KR102684036B1 - Air conditioning system - Google Patents

Abstract

An air conditioning system according to an embodiment of the present invention includes an air conditioning unit; heating heater; Chiller unit; bypass damper; Coolant valve; temperature Senser; and a control unit.
The air conditioning unit may include an indoor air intake unit, a heat exchanger for exchanging heat with air introduced into the indoor air intake unit, and a bypass unit through which air is introduced by bypassing the heat exchanger. The heating heater may be placed in an air-conditioned room where an air-conditioning unit is installed. The chiller unit can be connected to a heat exchanger and a cold water circulation path. The bypass damper may be installed in the bypass section. The cooling water valve can be installed in the cold water circulation path. A temperature sensor can measure temperature. In the heating preheating control mode, the control unit can control the cooling water valve to be fully closed and turn on the heating heater.
According to this, in the heating preheating mode, air heated by the heating heater flows into the indoor air intake and is not cooled in the heat exchanger, thereby enabling heating.

Description

Air conditioning system{AIR CONDITIONING SYSTEM}

The present invention relates to an air conditioning system, and more specifically, to an air conditioning system including a heating heater controlled by a control unit.

In general, an air conditioner is a device that creates a more comfortable indoor environment for users and can control at least one of air temperature, humidity, and cleanliness.

An air conditioner is a system that cools, heats, or ventilates the space to be conditioned by repeating the action of sucking indoor air, exchanging heat with a low-temperature or high-temperature refrigerant, and then discharging it indoors. It consists of a compressor, an expansion mechanism, and a first heat exchanger. It consists of a refrigerant refrigeration cycle consisting of a heat exchanger (condenser or evaporator) and a second heat exchanger (evaporator or condenser).

And, as is well known, air conditioners are largely divided into separate air conditioners in which the outdoor and indoor units are installed separately, and integrated air conditioners in which the outdoor and indoor units are installed as one. Depending on the size of the capacity, there are small-capacity air conditioners and large-capacity air conditioners. It can be divided into air conditioners.

In particular, a large-capacity air conditioner may have an indoor unit and an outdoor unit integrated into one unit, and may have a structure capable of providing high-quality air conditioned to a large number of air-conditioned spaces requiring air conditioning through ducts, etc.

In addition, among large-capacity air conditioners, those designed to provide the user with an optimal air conditioning feeling by mixing outside air (outdoor air) and indoor air in an appropriate ratio according to the target load according to the temperature, humidity, and cleanliness of the target space. It is also classified as an ‘Air Handling Unit’.

Such an air handling unit can be configured for each module according to each function so that the system can be efficiently operated according to the load capacity of the target space.

One problem that the present invention seeks to solve is to provide an air conditioning system equipped with a heating heater that increases the temperature of air flowing into the air conditioning unit.

Another problem to be solved by the present invention is to provide an air conditioning system that can provide heating by controlling the amount of cold water flowing into the heat exchanger.

An air conditioning system according to an embodiment of the present invention includes an air conditioning unit; heating heater; Chiller unit; bypass damper; Coolant valve; temperature Senser; and a control unit.

The air conditioning unit may include an indoor air intake unit, a heat exchanger for exchanging heat with air introduced into the indoor air intake unit, and a bypass unit through which air is introduced by bypassing the heat exchanger. A heating heater may be placed in an air-conditioned room where the air-conditioning unit is installed. The chiller unit may be connected to the heat exchanger and a cold water circulation passage. A bypass damper may be installed in the bypass unit. A cooling water valve may be installed in the cold water circulation passage. A temperature sensor can measure temperature.

In the heating preheating control mode, the control unit can control the cooling water valve to be fully closed and turn on the heating heater.

According to this, in the heating preheating mode, air heated by the heating heater flows into the indoor air intake and is not cooled in the heat exchanger, thereby enabling heating.

The control unit may control the bypass damper to be fully closed in the heating preheating mode.

The air conditioning system according to an embodiment of the present invention may further include an exhaust damper disposed in the air conditioning room. The air conditioning unit further includes an outside air intake unit equipped with an outside air damper, and the control unit may control the exhaust damper and the outside air damper.

The control unit may control the outside air damper and the exhaust damper to be fully closed in the heating preheating control mode.

The control unit executes the heating preheating control mode when the measured temperature detected by the temperature sensor is below the preheating judgment temperature, and when the measured temperature exceeds the preheating judgment temperature, the bypass mode is performed according to the measured temperature and the desired temperature. You can enter a regular control mode that controls the damper and the coolant valve.

When entering the regular control mode, the control unit may control the outside air damper and the exhaust damper to a set opening degree, control each of the bypass damper and the coolant valve to be fully opened, and turn off the heating heater.

In the regular control mode, if the measured temperature is less than the lower limit set value of the desired temperature, the controller may control the bypass damper with priority over the coolant coil.

In the regular control mode, if the measured temperature is less than the lower limit set value of the desired temperature, the control unit operates the bypass damper until the measured temperature is greater than or equal to the lower limit set value of the desired temperature or the bypass damper is fully open. The opening degree may be increased by a first set opening degree at a first predetermined period.

If the measured temperature is less than the lower limit set value of the desired temperature and the bypass damper is fully open, the control unit adjusts the opening degree of the coolant valve to a second degree until the measured temperature is greater than the lower limit set value or the coolant valve is fully closed. The second setting opening degree can be decreased by setting cycle.

In the regular control mode, if the measured temperature exceeds the upper limit setting value of the desired temperature, the controller may control the cooling water valve with priority over the bypass damper.

In the regular control mode, if the measured temperature exceeds the upper limit set value of the desired temperature, the control unit adjusts the opening degree of the coolant valve until the measured temperature is less than or equal to the upper limit set value of the desired temperature or the coolant valve is fully open. The third set opening degree can be increased by the third predetermined period.

If the measured temperature exceeds the upper limit setting value of the desired temperature and the cooling water valve is fully open, the control unit operates the bypass damper until the measured temperature is below the upper limit setting value of the desired temperature or the bypass damper is fully closed. The opening degree can be decreased by the fourth set opening degree at the fourth predetermined period.

According to a preferred embodiment of the present invention, heating of the room may be possible by increasing the temperature of air introduced into the air conditioning unit by the heating heater.

Additionally, indoor heating may be possible by controlling the amount of cold water flowing into the heat exchanger.

Additionally, indoor heating may be possible by blocking the inflow of outside air and circulating indoor air.

Figure 1 is a perspective view of an air conditioning unit according to an embodiment of the present invention as seen from one direction.
Figure 2 is a perspective view of an air conditioning unit according to an embodiment of the present invention as seen from another direction.
Figure 3 is a diagram showing the interior of an air conditioning unit according to an embodiment of the present invention.
Figure 4 is a perspective view showing a mixing unit.
Figure 5 is an exploded perspective view of the mixing unit.
Figure 6 is a perspective view showing a blowing unit.
Figure 7 is an exploded perspective view of the blowing unit.
Figure 8 is an exploded perspective view of the control unit.
Figure 9 is a perspective view showing the extraction unit.
Figure 10 is an exploded perspective view of the extraction unit.
Figure 11 is a diagram briefly illustrating an air conditioning unit according to another embodiment of the present invention.
Figure 12 is a perspective view showing an extraction unit of an air conditioning unit according to another embodiment of the present invention.
Figure 13 is a configuration diagram showing an example of an air conditioning system including an air conditioning unit according to an embodiment of the present invention.
Figure 14 is a control block diagram for controlling an air conditioning system.
Figure 15 is a flowchart showing the operation sequence of the air conditioning system during cooling operation.
Figure 16 is a flowchart showing the operation sequence of the air conditioning system during heating operation.
Figure 17 is a flowchart showing the operation sequence of the air conditioning system in the regular control mode.

Hereinafter, specific embodiments of the present invention will be described in detail along with the drawings.

Figure 1 is a perspective view of an air conditioning unit according to an embodiment of the present invention as seen from one direction, and Figure 2 is a perspective view of an air conditioning unit according to an embodiment of the present invention as seen from another direction.

Referring to Figures 1 and 2, the air conditioning unit 1 according to this embodiment may include a main body 10. The main body 10 may be integral.

The air conditioning unit 1 may include a mixing unit 100 and a blowing unit 200. The air conditioning unit 1 may further include an extraction unit 300. At this time, the main body 10 is not formed as a single piece, but may be formed by combining the mixing unit 100, the blowing unit 200, and the extraction unit 300.

The main body 10 may have a substantially rectangular parallelepiped shape, but is not limited thereto.

The blowing unit 200 may be disposed between the mixing unit 100 and the extraction unit 300. This is so that the blowing mechanism 210 provided inside the blowing unit 200 blows the air mixed in the mixing unit 100 to the blowing port 310 formed in the blowing unit 300.

For example, the mixing unit 100 may be placed above the blowing unit 200 and the blowing unit 300 may be placed above the blowing unit 300 .

The air conditioning unit 1 can condition the air in the room 50 by supplying air to the room 50 (see FIG. 11). The air conditioning unit 1 can blow air through a duct connected to the room 50.

The main body 10 may be provided with an indoor air intake unit 110, an outdoor air intake unit 120, and a bypass unit 130. In more detail, the mixing unit 100 may include an indoor air intake unit 110, an outdoor air intake unit 120, and a bypass unit 130. The indoor air intake unit 110, the outside air intake unit 120, and the bypass unit 130 are preferably located on different sides of the mixing unit 100, respectively.

In addition, in order to lower the overall height of the air conditioning unit 1, the indoor air intake unit 110, outdoor air intake unit 120, and bypass unit 130 are not located on the upper surface of the main body 10, but on the peripheral surface. Location is desirable.

Indoor air may flow into the indoor air intake unit 110. At this time, indoor air may mean return air (RA) that circulates around the room 50 and returns. Circulating air (RA) may have a relatively high temperature and carbon dioxide (CO₂) concentration due to the body temperature and respiration of people active indoors (50).

Outdoor air (OA), which is outdoor air, may be introduced into the outdoor air intake unit 120. Outdoor air (OA) may have a relatively low CO₂ partial pressure.

Through the bypass unit 130, the circulating air (RA) returned after circulating in the room 50 can be introduced into the main body 10 by bypassing the indoor air intake unit 110.

The air introduced into the indoor air intake unit 110, the outdoor air intake unit 120, and the bypass unit 130 may be mixed inside the main body 10. In more detail, the air introduced into the indoor air intake unit 110, the outdoor air intake unit 120, and the bypass unit 130 may be mixed in the mixing unit 100.

At least one of the outdoor air intake unit 120 and the bypass unit 130 may be provided with a damper. For example, the outside air intake unit 120 may be provided with an outside air damper 121, and the bypass unit 130 may be provided with a bypass damper 131.

Dampers may include a vane that adjusts the opening degree of a flow path through which air flows depending on the rotation angle, and a damper actuator that operates the vane. The control unit 90 may control the opening degree of each damper by operating the damper actuator. By operating the damper actuator under the control of the control unit 90, the rotation angle of the vane can be controlled.

An increase in the damper opening may mean that the damper is open. A decrease in the damper opening may mean that the damper is closed.

The control unit 90 can control the outside air (OA) and circulating air (RA) flowing into the main body 10 by adjusting the opening degrees of the outside air damper 121 and the bypass damper 131.

A cold water circulation passage 114 may be connected to the main body 10. In more detail, a cold water circulation passage 114 may be connected to the mixing unit 100. The cold water circulation passage 114 may include an inlet passage 115 and an outlet water passage 116. The cold water circulation passage 114 may be connected to a heat exchanger 131, which will be described later.

A blowing mechanism 210 may be disposed inside the main body 10. In more detail, the blowing unit 200 may include a blowing mechanism 210. The blowing mechanism 210 may serve to blow air mixed in the mixing unit 100 to the blowing unit 300.

Accordingly, the blowing mechanism 210 may be located below the indoor air intake unit 110, the outside air intake unit 120, and the bypass unit 130, and may be located above the outlet 310.

At least one outlet 310 may be formed in the main body 10. In more detail, the extraction unit 300 may include at least one outlet 310. The outlet 310 may be located on the bottom of the main body 10, but is preferably formed on the peripheral surface of the main body 10 in order to lower the overall height of the air conditioning unit 1.

The outlet 310 may be selectively opened and closed.

The outlet 310 may be a hole formed by opening at least a portion of one side of the outlet unit 300.

The outlet 310 may be formed on at least one of the peripheral surfaces of the outlet unit 300. For example, the outlet 310 may be formed on the left and right sides of the outlet unit 300.

The air mixed in the mixing unit 100 may pass through the blowing unit 200 by the blowing mechanism 210, flow to the blowing unit 300, and be blown out through the blowing port 310. At this time, the air mixed in the mixing unit 100 and blown out through the outlet 310 may refer to supply air (SA).

The main body 10 may be provided with at least one inspection door. For example, the mixing unit 100 may include a mixing unit inspection door 140. The manager can perform maintenance work on the mixing unit 100 by opening the mixing unit inspection door 140. The mixing unit inspection door 140 may be installed on a side of the mixing unit 100 other than the side where the indoor air intake part 110, the outside air intake part 120, and the bypass part 130 are located.

The main body 10 may be equipped with a control unit 290. The controller 295 included in the control unit 290 may include an inverter drive, an interface (HMS: Human-Machine Interface), etc.

The controller 295 may be a control unit of the air conditioning unit 1.

The inverter drive of the controller 295 can set the wind volume or static pressure for each site by controlling the rotation speed of the motor of the blowing device. This allows the air conditioning unit to operate under optimal conditions. In addition, by manipulating the interface, the user can control the air volume of the supply air (SA), the operation status of the air conditioning unit (1), check the operation history, and control the air conditioning unit to operate according to the set schedule. possible.

Additionally, the controller 295 may include a communication unit. The communication unit may communicate with the central control unit. The central control unit may be a building management system (BMS) of the building where the air conditioning unit 1 is installed. Therefore, central control and monitoring through communication may be possible.

The control unit 290 may be a control box. The control unit 290 may be installed on the outer surface of the main body 10. That is, the part where the interface is located in the control unit 290 may be exposed to the outside of the main body 10. As a result, the user can control the air conditioning unit 1 by simply accessing the interface of the control unit 290, and control convenience can be increased.

If the control unit 290 is installed in the mixing unit 100, the flow of air flowing into the mixing unit 100 may be obstructed, and the position of the control unit 290 is high so that the user cannot use the control unit 290. It can be difficult to access. Therefore, the control unit 290 is preferably installed in the blowing unit 200.

If the control unit 290 is arranged to face the blowing mechanism 210, the vibration resulting from the operation of the blowing mechanism 210 may be directly transmitted to the control unit 290, lowering the stability of the control unit 290. there is.

Accordingly, the control unit 290 may be located between the mixing unit 100 and the blowing mechanism 210. The control unit 290 may be located between the heat exchanger 110 and the blowing mechanism 210. It is also possible for the control unit 290 to be located between the blowing mechanism 210 and the blowing unit 300.

Figure 3 is a diagram showing the interior of an air conditioning unit according to an embodiment of the present invention.

Referring to FIG. 3, the mixing unit 100, the blowing unit 200, and the blowing unit 300 may be in communication.

A heat exchanger 111 may be disposed inside the main body 10. An indoor air filter 112 may be installed in the indoor air intake unit 110.

As described above, circulating air (RA) may flow into the indoor air intake unit 110. Since the circulating air (RA) is air circulated in the room 50, it may be hot air whose temperature has risen due to the body temperature of people in the room 50. Accordingly, the heat exchanger 111 can heat exchange the air introduced into the main body 10 through the indoor air intake unit 110.

A cold water circulation passage 114 may be connected to the heat exchanger 111. In more detail, an inlet flow path 115 and an outlet water flow path 116 may be connected to the heat exchanger 111.

Cold water supplied by the chiller unit 5 (see FIG. 11), which will be described later, may flow into the heat exchanger 111 through the water intake passage 115. The cold water flowing into the heat exchanger 111 exchanges heat with the circulating air (RA) sucked through the indoor air intake unit 110 and can cool the circulating air (RA). Cold water heat-exchanged with the circulating air (RA) in the heat exchanger 111 may flow into the water outlet passage 116.

A cooling water valve 62 (see FIG. 11) may be installed in the water intake passage 115. The control unit 90 may control the flow rate of cold water flowing into the heat exchanger 111 through the water intake passage 115 by adjusting the opening degree of the cooling water valve 62. If the flow rate of cold water flowing into the heat exchanger 111 increases, the temperature of the supply air (SA) may decrease, and if the flow rate of cold water flowing into the heat exchanger 111 decreases, the temperature of the supply air (SA) may increase.

The heat exchanger 111 may be arranged to face the indoor air intake unit 110. The heat exchanger 111 may be placed closer to the indoor air intake unit 110 than the outdoor air intake unit 120 and the bypass unit 130.

The heat exchanger 111 may be installed to be connected to the indoor air intake unit 110. In more detail, the heat exchanger 111 and the indoor air intake unit 110 may be installed in contact with each other.

A drain pan 113 may be provided below the heat exchanger 111. Since the surface temperature of the heat exchanger 111 is lower than that of the surrounding air, water may form on the surface of the heat exchanger 111 due to condensation, and the water may flow down the heat exchanger 111. . The drain pan 113 may serve to receive water flowing down from the heat exchanger 111.

A drain flow path (not shown) is connected to the drain pan 113 so that water that falls into the drain pan 113 can be drained.

The indoor air filter 112 may include a pre-filter and/or a medium filter.

Since the circulated air (RA) is air circulated in the room 50, it may be polluted air passing through the room 50. The indoor air filter 112 can purify the circulating air (RA) flowing in through the indoor air intake unit 110.

The indoor air filter 112 may be installed outside the indoor air intake unit 110, but is not limited to this.

The heat exchanger 111 may be placed after the indoor air filter 112 along the flow direction of the circulating air (RA). Therefore, the circulating air (RA) purified in the indoor air filter 112 may flow into the indoor air intake unit 110, and the temperature of the circulating air (RA) may decrease as it passes through the heat exchanger 111. . That is, the circulating air (RA) introduced into the main body 10 through the indoor air intake unit 110 may be purified, low-temperature air.

Meanwhile, a bypass damper 131 may be installed in the bypass unit 130. A bypass filter 132 may be installed in the bypass unit 130.

Indoor air may be introduced into the bypass unit 130 by bypassing the indoor air intake unit 110. In more detail, the bypass unit 130 may bypass the heat exchanger 111 and allow circulating air (RA) to flow into the main body 10. That is, the circulating air (RA) heated in the room 50 may be introduced into the mixing unit 100 without being cooled in the heat exchanger 111.

When the temperature of the circulating air (RA) is sufficiently low, a portion of the circulating air (RA) flows into the main body 10 through the bypass unit 130, thereby reducing the energy required for heat exchange. In other words, there is an advantage that the energy required for heat exchange can be reduced.

In order to prevent the circulating air (RA) flowing into the bypass unit 130 from exchanging heat with the heat exchanger 111 on the indoor air intake unit 110, the bypass unit 130 and the indoor air intake unit 110 ) can be placed as far away from each other as possible. For example, if the indoor air intake unit 110 is located on one side of the main body 10, the bypass part 130 is located on the other side of the main body 10 facing the one side, not on the side perpendicular to the one side. can do. That is, the bypass unit 130 and the indoor air intake unit 110 may be arranged to face each other.

The bypass damper 131 may be provided in the bypass unit 130. The bypass damper 131 can control the flow rate of the circulating air (RA) flowing in through the bypass unit 130 by adjusting the opening degree.

When the bypass damper 131 is fully opened, the circulating air (RA) flowing into the bypass unit 130 preferably constitutes 50% of the supply air (SA) blown out through the outlet 310.

The bypass filter 132 may be provided in the bypass unit 130. The bypass filter 132 can purify the circulating air (RA) flowing in through the bypass unit 130.

The bypass filter 132 may include a pre-filter and/or a medium filter.

The bypass filter 132 may be installed outside the bypass unit 130, but is not limited to this.

The bypass damper 131 may be placed after the bypass filter 132 along the flow direction of the circulating air (RA). Therefore, the circulating air (RA) purified in the bypass filter 132 may flow into the bypass unit 130, and the bypass damper 131 may flow into the main body 10 through the bypass unit 130. The flow rate of incoming circulating air (RA) can be adjusted. Accordingly, the circulating air (RA) introduced into the main body 10 through the bypass unit 110 may be purified room temperature air.

An outdoor air damper 121 may be installed in the outdoor air intake unit 120. The outdoor air damper 120 can control the flow rate of outdoor air (OA) flowing in through the outdoor air intake unit 120 by adjusting the opening degree.

When the outside air damper 121 is fully opened, it is preferable that the outside air (OA) flowing into the outside air intake unit 120 constitutes 10% of the supply air (SA) blown out through the outlet 310.

Meanwhile, a control unit 290 may be installed on the outer surface of the main body 10. The control unit 290 may be installed on one side of the main body 10. The control unit 290 may be located between the heat exchanger 111 and the blowing mechanism 210.

In order to smooth the flow of air flowing by the blowing mechanism 210 and reduce noise, an auxiliary panel 270 disposed to face the control unit 290 may be disposed inside the main body 10.

The blowing mechanism 210 may include a blowing fan 211 and a motor 212.

The blowing fan 211 may be an axial flow fan. The blowing fan 211 may blow air mixed in the mixing unit 100 to the blowing unit 300.

The motor 212 may be located below the blowing fan. The motor can rotate the blower fan. The motor 212 may be controlled by the control unit 90. The control unit 90 can control the operating frequency (rpm) of the motor 212 to adjust the air volume and pressure of the supply air (SA) blown out through the outlet 310.

A blowing unit base 220 may be provided inside the main body 10. The blowing mechanism 210 may be supported by the blowing unit base 220. The blowing unit base 220 may be a blowing mechanism supporter.

Since the air blown by the blowing mechanism 210 must flow to the blowing unit 300, the blowing unit base 220 may include a plurality of through holes. For example, the blowing unit base 220 may be a base frame formed in a grid shape by crossing a plurality of bars.

An air guide 320 may be installed on the inner bottom of the main body 10.

The air guide 320 may be installed on the bottom of the take-out unit 300 and protrude toward the inside of the take-out unit 300. At this time, the degree of protrusion may decrease from the center to the edge of the air guide 320. That is, the distance between the upper surface of the air guide 320 and the lower surface of the main body 10 may decrease from the center to the edge.

The air flowing into the blowing unit 300 by the blowing mechanism 210 may be guided along the upper surface of the air guide 320 and blown out through the blowing port 310. Accordingly, the flow resistance of the supply air (SA) blown from the blowing unit 300 to the blowing port 310 can be reduced and the noise generated during blowing can be reduced.

Meanwhile, the mixing unit 100, blowing unit 200, and extraction unit 300 may each be modularized. In this case, diversity can be provided in the configuration of the air conditioning unit (1) by adding and removing each unit (100, 200, and 300), and each unit (100, 200, and 300) can be increased or decreased depending on the required air conditioning capacity. This is possible. In addition, each completed unit (100, 200, 300) can be transported in a separated state to the location where the air conditioning unit (1) is installed, and the assembly process of each unit (100, 200, 300) is also very quick and simple. It can be accomplished.

The mixing unit 100, blowing unit 200, and extraction unit 300 may be separably coupled to each other. At this time, the air conditioning unit 1 includes a sealing member (not shown) disposed between the mixing unit 100 and the blowing unit 200 and/or between the blowing unit 200 and the blowing unit 300 to prevent leakage. It may further include.

When each unit is combined, the mixing unit 100 and the blowing unit 200 may be in communication, and the blowing unit 200 and the blowing unit 300 may be in communication.

Of course, it is also possible that the mixing unit 100, the blowing unit 200, and the extraction unit 300 are not separable from each other but are formed integrally.

Below, the composition and operation of each unit will be described in detail.

Figure 4 is a perspective view showing a mixing unit, and Figure 5 is an exploded perspective view of the mixing unit.

The mixing unit 100 may refer to the upper part of the air conditioning unit 1. The mixing unit 100 may be disposed above the blowing unit 200 and may be in communication with the blowing unit 200.

Referring to FIGS. 4 and 5 , the mixing unit 100 may have a substantially rectangular parallelepiped shape.

The mixing unit 100 may be located above the blowing unit 200. The mixing unit 100 may be in communication with the blowing unit 200.

The mixing unit 100 may include at least one of a mixing unit frame 150, an indoor air intake unit 110, an outside air intake unit 120, a bypass unit 130, and a mixing unit inspection door 140. . The mixing unit 100 may include a heat exchanger 111 and a drain pan 113.

The mixing unit frame 150 may be formed by combining a plurality of bars. The mixing unit frame 150 may be made of metal.

The indoor air intake unit 110, the outside air intake unit 120, and the bypass unit 130 are preferably disposed on different sides of the mixing unit 100, but are not limited thereto.

The indoor air intake unit 110, the outdoor air intake unit 120, and the bypass unit 130 may be spaced apart from each other.

In order for the air flowing into the bypass unit 130 to not exchange heat with the heat exchanger 111 on the indoor air intake unit 110, the distance between the bypass unit 130 and the indoor air intake unit 110 is maximized. This is desirable. Accordingly, the bypass unit 130 and the indoor air intake unit 110 may be arranged to face each other. In more detail, the bypass unit 130 may be placed on one side of the mixing unit 100, and the indoor air intake section 110 may be placed on the other side facing the one side.

The indoor air intake unit 110 may include a first panel 118 on which an indoor air intake port 119 is formed. The indoor air intake unit 110 may further include a first fixing unit 117.

The first panel 118 may be fastened to the mixing unit frame 150. An indoor air intake port 119 may be formed in the first panel 118. Circulating air (RA) may be introduced into the mixing unit 100 through the indoor air intake port 119.

A first fixing part 117 may be fastened to the front of the first panel 118. The front may be a surface facing the outer surface of the mixing unit 100. The first panel 118 and the first fixing part 117 may be formed as one piece. The first fixing part 117 may be a bracket assembly in which a plurality of brackets are combined.

An indoor air filter 112 may be installed in the first fixing part 117. The circulated air (RA) purified in the indoor air filter 112 may be introduced into the mixing unit 100 through the indoor air intake port 119 of the first panel 118.

A heat exchanger 111 may be disposed inside the mixing unit 100. Additionally, a drain pan 113 may be disposed inside the mixing unit 100. In more detail, a heat exchanger 111 and a drain pan 113 may be disposed inside the mixing unit frame 150.

The heat exchanger 111 may be arranged to face the indoor air intake unit 110. Preferably, the heat exchanger 111 may be provided on the back of the first panel 118. The rear surface may be a surface facing the inner direction of the mixing unit 100. That is, the heat exchanger 111 may be in contact with the first panel 119.

The size of the heat exchanger 111 may be larger than the size of the indoor air intake port 119. Accordingly, the entire circulating air (RA) flowing in through the indoor air intake port 119 can exchange heat while passing through the heat exchanger 111.

The drain pan 113 may be located below the heat exchanger 111. As previously described, the drain pan 113 can receive water that falls on the surface of the heat exchanger.

Meanwhile, an outdoor air intake port 122 may be formed in the outdoor air intake unit 120. Outside air (OA) may flow into the mixing unit 100 through the outside air inlet 122.

The outside air intake unit 120 may be fastened to the mixing unit frame 150.

An outdoor air damper 121 may be installed in the outdoor air intake unit 120. In more detail, the outdoor air damper 121 may be installed at the outdoor air intake port 122. The outdoor air damper 121 can adjust the opening degree to control the flow rate of outdoor air flowing into the mixing unit 100 through the outdoor air inlet 122.

The outdoor air intake unit 120 may be connected to the outdoor air flow path 123 (see FIG. 11), which will be described later. Alternatively, the outdoor air damper 121 may be connected to the outdoor air flow path 123. Outdoor air (OA) flowing into the outdoor air flow path 123 may pass through the outdoor air damper 121 and flow into the mixing unit 100 through the outdoor air inlet 122.

Meanwhile, the bypass unit 130 may include a second panel 134 on which the bypass inlet 133 is formed. The bypass unit 130 may further include a second fixing unit 135.

The second panel 134 may be fastened to the mixing unit frame 150. A bypass inlet 133 may be formed in the second panel 134. Circulating air (RA) may be introduced into the mixing unit 100 through the bypass inlet 133.

A second fixing part 135 may be fastened to the front of the second panel 134. The front may be a surface facing the outer surface of the mixing unit 100. The second panel 134 and the second fixing part 135 may be formed as one piece. The second fixing part 135 may be a bracket assembly in which a plurality of brackets are combined.

A bypass filter 132 may be installed in the second fixing part 135. The circulating air (RA) purified in the bypass filter 132 may be introduced into the mixing unit 100 through the bypass inlet 133 of the second panel 134.

A bypass damper 131 may be installed in the bypass unit 130. In more detail, the bypass damper 131 may be installed at the bypass inlet 133. The bypass damper 131 can adjust the opening degree to control the flow rate of external air flowing into the mixing unit 100 through the bypass inlet 133.

It is also possible that the second panel 134 and the second fixing part 135 are not directly fastened, but the second fixing part 135 is fastened to the bypass damper 131 installed on the second panel 134.

Circulating air (RA) that has passed through the bypass damper 131 may be introduced into the mixing unit 100 through the bypass inlet 133.

Meanwhile, the mixing unit inspection door 140 is fastened to the mixing unit frame 150 to open and close the mixing unit 100. The user can maintain the mixing unit 100 by opening the mixing unit inspection door 140.

The mixing unit 100 may further include at least one first casing panel 160. The first casing panel 160 may be fastened to the mixing unit frame 150.

When there are a plurality of first casing panels 160, the size and shape of each first casing panel 160 may be different.

The first casing panel 160 is located in the mixing unit frame 150 except for the part where the indoor air intake part 110, the outdoor air intake part 120, the bypass part 130, and the mixing unit inspection door 140 are fastened. It can be fastened to the part.

However, in order for the mixing unit 100 and the blowing unit 200 to communicate, the first casing panel 160 may not be fastened to the lower part of the mixing unit frame 150.

The indoor air intake unit 110, the outdoor air intake unit 120, the bypass unit 130, and the mixing unit inspection door 140 are preferably fastened to the peripheral portion of the mixing unit frame.

Hereinafter, the operation of the mixing unit 100 will be described.

The mixing unit 100 may mix circulating air (RA) flowing into the indoor air intake unit 110 and the bypass unit 130 and outdoor air (OA) flowing into the outdoor air intake unit 120.

A portion of the circulating air (RA) may be introduced through the indoor air intake unit 110. The circulating air (RA) flowing into the indoor air intake unit 110 may be purified in the indoor air filter 112, exchange heat with the heat exchanger 111, and then be introduced into the mixing unit 100. That is, the air introduced into the mixing unit 100 through the indoor air intake unit 110 may be purified air with a high carbon dioxide concentration and low temperature.

Another part of the circulating air (RA) may be introduced by bypassing the heat exchanger 111 through the bypass unit 130. The circulating air (RA) flowing into the bypass unit 130 may be purified in the bypass filter 132, pass through the bypass damper 131, and then be introduced into the mixing unit 100. Since the air introduced into the mixing unit 100 through the bypass unit 130 does not exchange heat in the heat exchanger 111, the air introduced into the mixing unit 100 through the bypass unit 130 has a high carbon dioxide concentration. , it may be purified air at room temperature.

Outside air (OA) may be introduced through the outside air intake unit 120. Outdoor air (OA) flowing into the outside air intake unit 120 may pass through the outside air damper 121 and flow into the mixing unit 100. That is, the air introduced into the mixing unit 100 through the outdoor air intake unit 120 may be air with a low carbon dioxide concentration.

The air introduced into the indoor air intake unit 110, the outdoor air intake unit 120, and the bypass unit 130 may be mixed inside the mixing unit 100. The air mixed in the mixed pressure unit 100 may constitute supply air (SA) blown out through the outlet 310.

The amount of air flowing into the indoor air intake unit 110 may be constant. Depending on the flow rate of cold water flowing into the heat exchanger 111, the temperature of the air sucked into the indoor air intake unit 110 may vary. That is, the control unit 90 is a cooling water valve 62 connected to the cold water circulation passage 114 connected to the heat exchanger 111, or a chiller unit 5 that supplies cold water through the cold water circulation passage 114 (see FIG. 11). ) can be controlled to adjust the temperature of the air flowing into the indoor air intake unit 110. The more cold water flows into the heat exchanger 111, the more active the heat exchange can be between the air flowing into the indoor air intake unit 110 and the cold water of the heat exchanger 111, and the more cold water flowing into the indoor air intake unit 110 becomes. The temperature of the air may decrease. This can lower the temperature of the supply air (SA).

The amount of air flowing into the outdoor air intake unit 120 may vary depending on the opening degree of the outdoor air damper 121. The temperature of outside air (OA) may be higher or lower than that of circulating air (RA). The control unit 90 may control the amount of air flowing into the outdoor air intake unit 120 by adjusting the opening degree of the outdoor air damper 121. As more outside air (OA) flows into the outside air intake unit 120, the carbon dioxide concentration of the supply air (SA) may decrease.

The amount of air flowing into the bypass unit 130 may vary depending on the opening degree of the bypass damper 131. The control unit 90 may control the amount of air flowing into the bypass unit 130 by adjusting the opening degree of the bypass damper 131. As more indoor air flows into the bypass unit 130, the temperature of the supply air (SA) may increase. That is, the temperature of the supply air (SA) may be close to the temperature of the circulating air (RA).

Therefore, if the temperature of the circulating air (RA) is sufficiently low, the amount of air flowing into the bypass unit 130 is increased without heat exchange at the indoor air intake unit 110, thereby creating supply air (SA) with an optimal temperature. can be supplied. That is, by providing the bypass unit 130 in the mixing unit 100, there is an advantage in that optimal control of the supply air (SA) temperature is possible and energy required for heat exchange can be saved.

Figure 6 is a perspective view showing a blowing unit, Figure 7 is an exploded perspective view of the blowing unit, and Figure 8 is an exploded perspective view of the control unit.

Referring to FIGS. 6 to 8 , the blowing unit 200 may have a substantially rectangular parallelepiped shape.

The blowing unit 200 may be located between the mixing unit 100 and the blowing unit 300. The blowing unit 200 may be located below the mixing unit 100 and above the blowing unit 300. The blowing unit 200 may be in communication with the mixing unit 100 and the blowing unit 300, respectively.

The blowing unit 200 may include at least one of a blowing unit frame 250, a blowing unit base 220, a blowing unit inspection door 230, and a guide member 240. The blowing unit 200 may include a blowing mechanism 210.

The blowing unit frame 250 may be formed by combining a plurality of bars. The blowing unit frame 250 may be made of metal. The blowing unit frame 250 may include an upper frame 251 and a lower frame 252.

A control unit 290 may be installed in the upper frame 251. In more detail, a control unit 290 may be installed on the side of the upper frame 251.

A blowing mechanism 210 may be disposed inside the lower frame 252.

Additionally, a guide member 240 may be installed on the lower frame 252. In more detail, a guide member 240 may be installed on the upper part of the lower frame 252. It is also possible for the guide member 240 to be installed below the upper frame 251.

A blowing unit inspection door 230 may be installed in the lower frame 252. In more detail, a blowing unit inspection door 230 may be installed on the side of the lower frame 252. Additionally, a blowing unit base 220 may be installed on the lower frame 252. In more detail, a blowing unit base 220 may be installed at the lower part of the lower frame 252.

The blowing unit base 220 may be located at the lower part of the blowing unit 200. The blowing unit base 220 may be installed at the lower part of the blowing unit frame 250.

The blowing unit base 220 can support the blowing mechanism 210. The blowing unit base 220 may have at least one through hole through which air passes. For example, when the blowing unit base 220 is a grid-type base frame, the space between the grids may be a through hole.

The blowing unit inspection door 230 may be installed on the side of the blowing unit frame 250. The blowing unit inspection door 230 can open and close the blowing unit 200. The manager or user can access the inside of the blowing unit 200 by opening the blowing unit inspection door 230, and it is also possible to separate the blowing mechanism 210 from the blowing unit 200 and remove it.

The guide member 240 may be installed on the blowing unit frame 250. The guide member 240 may serve to guide the air mixed in the mixing unit 100 to the blowing mechanism 210. The guide member 240 may be located above the blowing mechanism 210. The guide member 240 may be located between the mixing unit 100 and the blowing mechanism 210.

The blowing unit 200 may further include at least one second casing panel 260. The second casing panel 260 may be fastened to the blowing unit frame 250.

When there are a plurality of second casing panels 260, the size and shape of each second casing panel 260 may be different.

The second casing panel 260 may be fastened to a portion of the blowing unit frame 250 other than the portion where the blowing unit inspection door 140 is fastened.

However, in order for the mixing unit 100 and the blowing unit 200 to communicate, the second casing panel 260 may not be fastened to the upper part of the blowing unit frame 250. Additionally, in order for the blowing unit 200 and the blowing unit 300 to communicate, the second casing panel 260 may not be fastened to the lower part of the blowing unit frame 250.

The blowing mechanism 210 may be located inside the blowing unit 200. In more detail, the blowing mechanism 210 may be located inside the blowing unit frame 250.

The blowing mechanism 210 can blow the air mixed in the mixing unit 100 to the blowing unit 300. That is, the blowing mechanism 210 can cause air from the upper side to flow downward.

As described above, the blowing mechanism 210 may include a blowing fan 211 and a motor 212. The blowing mechanism 210 can be modularized and detachably fastened to the blowing unit 200.

The blowing mechanism 210 may be supported by the blowing unit base 220. The upper end of the blowing mechanism 210 may be in contact with the guide member 240. Accordingly, the air mixed in the mixing unit 100 can be guided to the blowing mechanism 210 along the upper surface of the guide member 240.

The blowing fan 211, which rotates by driving the motor 212, can form a downward airflow from the mixing unit 100 through the blowing unit 200 to the blowing unit 300.

The air sucked into the blowing mechanism 210 may be blown by the blowing fan 211, pass through the through hole formed in the blowing mechanism base 220, and be blown out through the blowing port 310 formed in the blowing unit 300. That is, the blowing mechanism 210 can cause air to flow through the mixing unit 100, the blowing unit 200, and the blowing unit 300 in order.

The control unit 290 may be installed in the blowing unit 200. In more detail, the control unit 290 may be installed on the blowing unit frame 250.

The control unit may include a control unit door 291, a controller 295, and a casing 293.

The casing 293 may be in the form of a box with one side open. An insulating material (not shown) may be provided on the back of the casing 293.

A control unit door 291 may be installed on one open surface of the casing 293. The control unit door 291 can open and close the control unit 290. A user or administrator can open the control unit door 291 and directly control the controller 295.

A controller 295 may be provided inside the casing 293. The controller 295 can control the bypass damper 131, the outside air damper 121, the coolant valve 62, the motor 212, etc. The controller 295 may include an inverter drive, an interface, a communication unit, etc. The inverter drive can control the operating frequency of the motor of the blowing mechanism. Users can enter commands into the controller through the interface. The communication unit can communicate with the Building Management System (BMS) of the building where the air conditioning unit 1 is installed. Therefore, central control and monitoring through communication may be possible.

The control unit 290 may be installed on the outer surface of the blowing unit 200. As a result, the user can control the air conditioning unit 1 by simply accessing the control unit 290, and control convenience can be increased.

If the control unit 290 is installed on the lower frame 252 on which the blowing mechanism 210 is disposed, the vibration resulting from the operation of the blowing mechanism 210 is directly transmitted to the control unit 290 and the control unit 290 ) may decrease its stability. Accordingly, the control unit 290 may be installed on the upper frame 251.

Hereinafter, the operation of the blowing unit 200 will be described.

Air mixed in the mixing unit 100 may flow into the blowing unit 200 in communication with the mixing unit 100. In more detail, the blowing mechanism 210 can suck the air mixed in the mixing unit 100 into the blowing unit 200.

The air sucked into the blowing unit 200 flows downward and can pass through the rear of the control unit 290.

Air sucked from the upper side of the blowing unit 210 may be sucked into the blowing mechanism 210 along the upper surface of the guide member 240. The air sucked into the blowing mechanism 210 may be discharged to the side and/or bottom of the blowing mechanism 210 by the blowing fan 211. Air discharged from the blowing mechanism 210 may flow downward.

Even if a portion of the air discharged from the blowing device 210 flows upward, it may be reflected from the lower surface of the guide member 240 and flow downward again.

The air discharged from the blowing mechanism 210 and flowing downward may pass through the blowing unit base 220 and flow into the blowing unit 300. In more detail, the air discharged from the blowing device 210 and flowing downward may pass through the through hole formed in the blowing unit base 220 and flow into the blowing unit 300.

Figure 9 is a perspective view showing the extraction unit, and Figure 10 is an exploded perspective view of the extraction unit.

Referring to FIGS. 9 and 10 , the extraction unit 300 may have a substantially rectangular parallelepiped shape. The height of the blowing unit 300 may be lower than the height of the mixing unit 100 or the blowing unit 200.

The blowing unit 300 may be located below the blowing unit 200. The blowing unit 300 may be in communication with the blowing unit 200.

The take-out unit 300 may include at least one of the take-out unit frame 300, the third casing panel 360, and the fixed door 330. At least one outlet 310 may be formed in the outlet unit 300. The take-out unit 300 may be provided with an air guide 320.

The take-out unit frame 360 may be formed by combining a plurality of bars. The take-out unit frame 360 may be made of metal.

The outlet 310 is preferably formed on at least a portion of the peripheral surface of the outlet unit 300. For example, the left and right sides of the take-out unit 300 may be open. At this time, the open left and right sides may be the outlet 310.

The third casing panel 360 may be installed at the bottom of the take-out unit frame 350. In order to communicate with the blowing unit 200, the third casing panel 360 may not be installed on the top of the blowing unit frame 350.

The air guide 320 may be installed on the inner bottom of the extraction unit 300. The air guide 320 may protrude inward of the extraction unit 300. The distance between the upper surface of the air guide 320 and the lower surface of the extraction unit 300 may become closer from the center to the edge of the air guide 320.

The air guide 320 can guide the air flowing from the blowing unit 200 to the blowing unit 300 to the blowing port 310. The air guide 320 can smooth the flow of supply air (SA) blown out through the outlet 310 and reduce noise generated by the flow of air in the blowing unit 300.

The fixed door 330 may be detachably installed at a side end of the take-out unit frame 350. The location of the outlet in the outlet may be determined depending on the installation position of the fixed door 330. For example, when the fixed door 330 is installed at the front and rear ends of the take-out unit frame 350, the left and right ends of the take-out unit frame 350 may form an outlet.

In the take-out unit 300, a portion of the take-out unit frame 350 where the fixed door 330 is not installed may be the take-out opening 310. Accordingly, the user can change the position of the outlet 310 by installing or removing the fixed door 330.

The operation of the extraction unit 300 will be described. The air blown from the blowing unit 200 to the blowing unit 300 by the blowing mechanism 210 may be blown out through the blowing port 310 along the upper surface of the air guide 320. At this time, the air blown out through the outlet 310 may mean supply air (SA).

FIG. 11 is a schematic diagram of an air conditioning unit according to another embodiment of the present invention, and FIG. 12 is a perspective view showing an extraction unit of an air conditioning unit according to another embodiment of the present invention.

Hereinafter, the same content as previously explained will be omitted and the explanation will focus on the differences.

11 and 12, the air conditioning unit 10 according to this embodiment may include a plurality of blowing units 200, and a plurality of blowing units 300 respectively corresponding to the plurality of blowing units 200. ) may further be included. For example, two blowing units 200 and two blowing units 100 may be provided.

The size of the mixing unit 100 may be larger than when a single blowing unit 200 is provided.

A plurality of blowing units 200 may be arranged side by side with each other. In more detail, the upper side of the plurality of blowing units 200 may be connected to the lower side of the mixing unit 100 and arranged in parallel.

It is preferable that the plurality of blowing units 200 do not communicate with each other, but the present invention is not limited thereto.

The mixing unit 100 may be arranged horizontally and horizontally above the plurality of blowing units 200. The mixing unit 100 may be in communication with each of the plurality of blowing units 200.

A plurality of blowing units 300 may be coupled to each blowing unit 200. In more detail, a plurality of blowing units 300 may be coupled to the lower side of each blowing unit 200 and arranged side by side.

A plurality of blowing units 300 may be in communication with each blowing unit 200.

Among the plurality of take-out units 300, a barrier panel may be installed between two take-out units 300 that are in contact with each other. In more detail, another take-out unit among the plurality of take-out units 300 that is in contact with one take-out unit may have a barrier panel installed on the side facing the take-out unit. At this time, the barrier panel may refer to the fixed door 330.

If the fixed door 330 is not installed between the two take-out units 300 that are in contact with each other, the two take-out units 300 may communicate with each other. In this case, there is a risk that the air blown from one blowing unit 200 connected to one blowing unit 300 and the air blown from another blowing unit 200 connected to the other blowing unit 300 may act as flow resistance to each other. there is. That is, it is preferable that the two extraction units 300 that are in contact with each other are partitioned rather than communicating with each other.

For example, when the air conditioning unit 1 includes two air blowing units 300, the left side of one air blowing unit 300 and the right side of the other air blowing unit 300 may be coupled to each other. At this time, the fixed door 300 may be installed on at least one of the left side of the take-out unit frame 350 of one take-out unit 300 and the right side of the take-out unit frame 350 of the other take-out unit 300.

According to this embodiment, there is an advantage that the air conditioning load that the air conditioning unit 1 can handle can be further increased by including a plurality of blowing units 200. In addition, since the existing blowing units 200 are combined rather than separately manufacturing blowing units of different sizes, the manufacturing cost of the air conditioning unit 1 can be reduced and the manufacturing process can be simplified.

Figure 13 is a configuration diagram showing an example of an air conditioning system including an air conditioning unit according to an embodiment of the present invention.

Referring to FIG. 13, the air conditioning system may include an air conditioning unit 1. The air conditioning system may further include a ventilation unit (3) and/or a chiller unit (5).

Hereinafter, the detailed structure and operation of the air conditioning unit 1 are the same as those described above, so description thereof will be omitted.

The air conditioning unit 1 may be placed in the air conditioning room 20 . In more detail, the mixing unit 100 and the blowing unit 200 of the air conditioning unit 1 may be located on the floor 24 of the air conditioning room, and the blowout unit 300 may be located below the floor 24 of the air conditioning room. can do.

The air conditioning system may include a floor duct 59. At least a portion of the floor duct 59 may be located below the indoor floor surface 55 of the room 50.

In more detail, the floor duct 59 is an air conditioning room floor duct 21 located below the air conditioning room floor surface 24 of the air conditioning room 20, and an indoor floor located below the indoor floor surface 55 of the room 50. It may include a duct 51.

An air conditioning room floor duct 21 may be located below the air conditioning room floor surface 24. The extraction unit 300 may be located inside the air conditioning room floor duct 21. It is also possible that the space below the air conditioning room floor surface 24 itself serves as the air conditioning room floor duct 21.

A heating heater 77 may be provided in the air conditioning room 20. The heating heater 77 can increase the temperature of the air conditioning room 20. In more detail, the heating heater 77 may increase the temperature of the circulating air (RA) inside the air conditioning room 20.

The interior 50 can be distinguished from the air conditioning room 20. The interior 50 may be a space where people are active. The indoor 50 may refer to the space between the indoor floor surface 55 and the indoor ceiling surface 56.

The air conditioning room floor duct 21 may communicate with the indoor floor duct 51 located below the indoor floor surface 55. In more detail, the air conditioning room floor duct 21 may communicate with the outlet 310 of the air conditioning unit 1 and the indoor floor duct 51.

It is also possible that the space below the indoor floor surface 55 itself serves as the indoor floor duct 51.

The indoor floor surface 55 may be provided with a plurality of outlet bodies 52 in which air discharge holes are formed. The indoor ceiling surface 56 may be provided with a plurality of inlet bodies 54 each having air intake holes. The outlet body and inlet body may be diffusers.

The outlet body 52 can communicate with the floor duct 59 and the interior 50. The inlet body 54 may communicate with the selling duct 53 and the interior 50.

The selling duct 53 disposed on the indoor ceiling surface 56 may communicate with the air conditioning room 20.

The supply air (SA) blown out from the outlet 310 of the air conditioning unit 1 to the air conditioning room floor duct 21 may flow into the indoor floor duct 51. Supply air (SA) may be introduced from the indoor floor duct 51 into the room 50 through an air discharge hole formed in the outlet body 52.

The temperature and carbon dioxide concentration of the supply air (SA) introduced into the room 50 may increase due to the body temperature or breathing of people active in the room 50. Accordingly, the temperature of the air introduced into the room 50 may gradually increase, and the air whose temperature rises may rise inside the room 50 and flow into the air intake hole formed in the inlet body 54. The air flowing into the selling duct 53 through the air intake hole may be circulating air (RA) that circulated in the room 50.

The circulating air (RA) flowing through the selling duct 53 may flow into the air conditioning room 20. Part of the circulating air (RA) flowing into the air conditioning room 20 flows into the exhaust passage 22, which will be described later, and another part flows into the mixing unit 100 through the indoor air intake unit 110, and another part flows into the mixing unit 100 through the indoor air intake unit 110. may flow into the mixing unit 100 through the bypass unit 130.

Since the supply air (SA) flows into the room 50 through the floor duct 59, the air conditioning system according to this example is a floor air conditioning system, and in this case, the air conditioning unit may be a floor air conditioner. This floor air conditioning system has the advantage of reducing floor height compared to a ceiling air conditioning system in which air is supplied from the indoor ceiling. At this time, the floor height may mean the height of the space above the indoor ceiling surface 56.

In addition, in the floor air conditioning system, it is preferable that the temperature of the supply air (SA) blown out from the outlet 310 of the air conditioning unit 1 is about 18°C. This is higher than the supply air temperature of 14°C in a typical ceiling air conditioning system, so it has the advantage of achieving the same air conditioning effect using less energy.

Meanwhile, the ventilation unit 3 may be installed in the sub air conditioning room 30, which is separate from the air conditioning room 20. It is also possible for the ventilation unit 3 to be installed outdoors.

The ventilation unit 3 may be connected to the air conditioning unit 1 and the outside air flow path 123, and may be connected to the air conditioning room 20 and the exhaust flow path 22.

The outdoor air flow path 123 may be connected to the outdoor air suction unit 120 of the air conditioning unit (1). Alternatively, the outdoor air flow path 123 may be connected to the outdoor air damper 121 installed in the outdoor air intake unit 110. The outside air flow path 123 may communicate with the ventilation unit 3 and the air conditioning unit 1.

The exhaust flow path 22 may communicate with the air conditioning room 20 and the ventilation unit 3. Air flowing out of the air conditioning room 20 through the exhaust passage may refer to exhaust air (EA: Exhaust Air).

An exhaust damper 23 may be installed in the exhaust passage 22. The exhaust damper 23 may be placed in the air conditioning room 20. The exhaust damper 23 can control the amount of air flowing into the exhaust passage 22 by adjusting the opening degree.

The ventilation unit 3 may include an exhaust unit 31 and an external air unit 32.

The external air unit 32 and the exhaust unit 31 may be partitioned by a barrier 33. That is, the barrier 33 may be located between the external air unit 32 and the exhaust unit 31.

The barrier 33 may be provided with an opening 34. The open portion 34 may include an open hole that communicates the external air portion 32 and the exhaust portion 31. A mixing damper 35 may be installed in the opening 34. The mixing damper 35 can adjust the opening degree to control the amount of air flowing from the exhaust unit 31 to the external air unit 32 through the opening unit 34.

An exhaust passage 22 may be connected to the exhaust unit 31. The exhaust unit 31 may be provided with an exhaust discharge unit 38. A sub-exhaust damper 39 may be installed in the exhaust discharge unit 38. The sub exhaust damper 39 can adjust the opening degree to control the amount of exhaust (EA) flowing out to the exhaust discharge unit 38.

The sub-exhaust flow path 40 may be connected to the exhaust discharge unit 38 or the sub-exhaust damper 39. The sub-exhaust passage 40 can connect the exhaust unit 31 to the outdoors. However, if the ventilation unit 3 is placed outdoors, the sub-exhaust passage 40 may be unnecessary.

An exhaust blowing mechanism 36 may be disposed inside the exhaust unit 31. The exhaust blowing mechanism 36 may blow air introduced into the exhaust unit 31 through the exhaust passage 22 to the exhaust discharge unit 38 and/or the opening unit 34.

An external air flow path 123 may be connected to the external air unit 32 . The external air unit 32 may be provided with an external air introduction unit 41. A sub-outside air damper 42 may be installed in the outside air inlet 41. The sub outside air damper 42 can control the amount of outside air (OA) flowing into the outside air inlet 41 by adjusting the opening degree.

A sub-outdoor air flow path 43 may be connected to the outside-air inlet 41 or the sub-outside air damper 42. The sub external air passage 43 may connect the external air unit 32 to the outdoors. However, if the ventilation unit 3 is placed outdoors, the sub-outdoor air flow path 43 may be unnecessary.

An outside air blowing mechanism 37 may be disposed inside the outside air unit 32. The outside air blowing mechanism 37 may blow air introduced into the outside air unit 32 through the outside air introduction part 41 and/or the opening part 34 to flow into the outside air passage 123.

The ventilation unit 3 may be equipped with an outside air heat exchanger 47. In more detail, an external air heat exchanger 47 may be disposed inside the external air unit 32.

The outside air heat exchanger 47 may be located between the outside air blowing mechanism 37 and the barrier 33. The outside air heat exchanger 47 may be located between the outside air inlet 41 and the outside air blowing mechanism 37. The connection portion between the outside air flow path 123 and the outside air portion 32 may be located on the opposite side of the outside air inlet portion 41 and the opening portion 34 with respect to the outside air heat exchanger 47.

A cold water circulation flow path 114 may be connected to the outside air heat exchanger 47. In more detail, a sub-circulation flow path 44 may be connected to the outside air heat exchanger 47.

The sub circulation passage 44 may include a sub inlet passage 45 and a sub outlet passage 46. The sub inlet flow path 45 may connect the inlet flow path 115 and the outside air heat exchanger 47. The sub water outlet passage 46 may connect the water outlet passage 116 and the outside air heat exchanger 47.

The sub water flow path 45 may be a flow path in which the water inlet flow path 115 is branched, and the sub water outlet flow path 46 may be a flow path in which the water outlet flow path 116 is branched.

Cold water flowing from the inlet flow path 115 to the outside air heat exchanger 47 through the sub-inlet flow path 45 passes through the outside air heat exchanger 47 and can exchange heat with the air inside the outside air unit 32. Cold water that has exchanged heat with air in the outside air heat exchanger 47 may flow into the water outlet passage 116 through the sub water outlet passage 46.

Hereinafter, the operation of the ventilation unit 3 will be described.

Outdoor air (OA), which is outdoor air, may flow into the outdoor air inlet 41. Outside air (OA) may flow into the outside air inlet 41 through the sub outside air passage 43. At this time, the amount of outside air (OA) flowing into the outside air inlet 41 may vary depending on the opening degree of the sub outside air damper 42.

The outside air (OA) introduced into the outside air introduction unit 41 may flow into the outside air unit 32. Additionally, the outside air (OA) introduced into the outside air introduction unit 41 may be mixed with the air flowing from the exhaust unit 31 to the outside air unit 32 through the opening part 34. That is, when the mixing damper 35 is open, some exhaust air (EA) may be mixed with the outside air (OA) flowing from the inside of the outside air unit 32 to the air conditioning unit 1 through the outside air passage 123. .

The outside air blowing mechanism 37 may blow air flowing into the outside air unit 32 through the outside air introduction part 41 and/or the opening part 34. In more detail, the air flowing into the outside air unit 32 through the outside air introduction part 41 and/or the opening part 34 may be flowed by the outside air blowing mechanism 37. The air passes through the outside air heat exchanger 37 and can exchange heat with cold water in the outside air heat exchanger 37, and can then flow into the outside air intake portion 121 of the air conditioning unit 100 through the outside air flow path 123. there is.

Accordingly, the outside air (OA) flowing into the mixing unit 100 through the outside air intake unit 120 may be low-temperature air. Additionally, as previously explained, the carbon dioxide concentration in outdoor air (OA) may be relatively low.

Meanwhile, the exhaust air (EA), which is part of the circulating air (RA) flowing from the selling duct 53 to the air conditioning room 20, may flow to the exhaust portion 31 of the ventilation unit 3 through the exhaust passage 22. there is. At this time, the exhaust damper 23 may be in an open state.

The exhaust EA flowing into the exhaust unit 31 may flow to the opening 34 and/or the exhaust discharge unit 38 by the exhaust blowing mechanism 36.

At this time, the amount of exhaust EA discharged from the opening portion 34 and the exhaust discharge portion 38 may vary depending on the opening degrees of the exhaust damper 39 and the mixing damper 35, respectively. For example, when the mixing damper 35 is closed and the exhaust damper 39 is open, all of the exhaust EA flowing into the exhaust unit 31 is transferred to the exhaust discharge unit 38. It can be fluid. That is, it can be discharged outdoors through the sub exhaust passage 40.

Meanwhile, the air conditioning system may include a chiller unit 5.

The chiller unit 5 may include a compressor, a condenser, an expansion mechanism, and an evaporator through which refrigerant circulates.

The refrigerant compressed in the compressor may be condensed in the condenser, expanded in the expansion mechanism, and evaporated in the evaporator. The refrigerant is evaporated in the evaporator and can exchange heat with cold water supplied to the cold water circulation passage 114. Therefore, cold water exchanges heat with the refrigerant and can become colder.

The chiller unit 5 may be placed in the machine room 60. The machine room 60 may be a basement. The machine room 60 can be distinguished from the indoor room 50, the air conditioning room 20, and the sub air conditioning room 30. However, the installation location of the chiller unit 5 is not limited to this, and it is also possible for the chiller unit 5 to be installed outdoors, such as on a rooftop.

The chiller unit 5 may serve to supply cold water to the heat exchanger 111 of the air conditioning unit 1 and/or the outside air heat exchanger 47 of the ventilation unit 3. Cold water may be cooling water.

The chiller unit 5 may be connected to a heat exchanger 111 and a cold water circulation passage 114. In more detail, the cold water circulation passage 114 may connect the evaporator and heat exchanger of the chiller unit 5. The cold water circulation passage 114 includes an inlet passage 115 through which cold water flows from the chiller unit 5 to the heat exchanger 111, and an outlet passage 116 through which cold water flows from the heat exchanger 111 to the chiller unit 5. ) may include.

A circulation pump 61 may be installed in the cold water circulation passage 114. The circulation pump 61 may be installed in the inlet water flow path 115 and/or the water outlet flow path 116. The circulation pump 61 may circulate cold water along the cold water circulation passage 114.

The sub circulation passage 44 may connect the cold water circulation passage 114 and the outdoor heat exchanger 47. The sub circulation passage 44 may include a sub inlet passage 45 and a sub outlet passage 46.

The sub inlet flow path 45 may connect the outside air heat exchanger 47 and the inlet flow path 115. Therefore, part of the cold water flowing from the chiller unit 5 to the inlet flow path 115 may flow into the outdoor heat exchanger 47 through the sub inlet flow path 45, and the remaining part may flow into the heat exchanger 111. It can be.

The sub water outlet passage 46 may connect the outside air heat exchanger 47 and the water outlet passage 116. Accordingly, the cold water flowing from the outside air heat exchanger 47 to the sub water outlet passage 115 may be combined with the cold water flowing from the heat exchanger 111 to the sub water outlet passage 116 and flow to the chiller unit 5.

As previously described, the air conditioning unit 1 is provided with a bypass unit, thereby saving unnecessary heat exchange energy. Therefore, the efficiency of the chiller unit 5 can be improved.

In addition, in the floor air conditioning system, it is preferable that the temperature of the cold water supplied from the chiller unit 5 through the water inlet passage 115 is 10°C. This is higher than 7°C, which is the temperature of cold water generally supplied in ceiling air conditioning systems. Accordingly, the efficiency of the chiller unit 5 can be improved.

Hereinafter, each sensor included in the air conditioning system will be described.

The air conditioning system may include a temperature sensor 65. The temperature sensor 65 includes an inlet temperature sensor 63, an outlet temperature sensor 64, an indoor temperature sensor 70, a supply air temperature sensor 71, a return temperature sensor 72, an outside air temperature sensor 78, and a mixture. It may include at least one of the temperature sensors 79.

Additionally, the air conditioning system may further include at least one of a carbon dioxide sensor 73, a static pressure sensor 76, and a smoke detection sensor 80. The air conditioning system may further include additional sensors as needed.

The water temperature sensor 63 may be installed in the water water flow path 115. The inlet temperature sensor 63 can measure the temperature of cold water flowing from the chiller unit 5 to the heat exchanger 111 through the inlet flow path 115.

The water outlet temperature sensor 64 may be installed in the water outlet passage 116. The water outlet temperature sensor 64 can measure the temperature of cold water flowing from the heat exchanger 111 to the chiller unit 5 through the water outlet passage 116.

The indoor temperature sensor 70 may be placed indoors 50 . The indoor temperature sensor 70 can measure the air temperature in the room 50. The air temperature in the room 50 may be higher than the temperature of the supply air (SA) and lower than the temperature of the circulating air (RA).

The supply air temperature sensor 71 can measure the temperature of the supply air (SA) blown out from the outlet 310.

The supply air temperature sensor 71 may be placed in the floor duct 59. In more detail, the supply air temperature sensor 71 may be placed in the air conditioning room floor duct 21. It is also possible for the supply air temperature sensor 71 to be disposed in the blowout unit 300.

The return temperature sensor 72 can measure the temperature of the circulating air (RA) flowing into the selling duct 53.

The return temperature sensor 72 may be placed at the top of the air conditioning room 20. In more detail, the return temperature sensor 72 may be installed adjacent to the portion in communication with the selling duct 53 at the upper part of the air conditioning room 20. Alternatively, the return temperature sensor 72 may be placed in the selling duct 53.

The carbon dioxide sensor 73 can measure the carbon dioxide concentration of circulating air (RA). The concentration of carbon dioxide may mean the partial pressure of carbon dioxide.

The carbon dioxide sensor 73 may be placed in the air conditioning room 20 or the room 50. In order to measure the carbon dioxide concentration of the circulating air (RA), the carbon dioxide sensor 73 is preferably installed in the air conditioning room 20.

The static pressure sensor 76 can measure the pressure within the floor duct 59. In more detail, the static pressure sensor 76 can measure the pressure within the indoor floor duct 51.

Static pressure sensor 76 may be placed in the floor duct 59. In more detail, the static pressure sensor 76 may be placed in the indoor floor duct 51.

The static pressure sensor 76 may include a first static pressure sensor 75 and a second static pressure sensor 74. The first static pressure sensor 75 may be disposed at an end of the floor duct 59 farthest from the outlet 310. The second static pressure sensor 74 may be disposed between the first static pressure sensor 75 and the outlet 310. The second static pressure sensor 74 is preferably disposed at an intermediate position between the first static pressure sensor 75 and the outlet 310.

Since the first static pressure sensor 75 is located further away from the outlet 310 through which the supply air (SA) is discharged than the second static pressure sensor 74, the pressure measured by the first static pressure sensor 75 is the second static pressure sensor ( 74) may be lower than the pressure measured.

The outside air temperature sensor 78 may be installed in the sub outside air passage 43. The outdoor temperature sensor 78 may be installed outdoors. The outdoor temperature sensor 78 can measure the temperature of outdoor air (OA) flowing in from outdoors.

Alternatively, the outside air temperature sensor 78 may be installed in the outside air passage 123. At this time, the outside air temperature sensor 78 can measure the temperature of outside air (OA) that is heat exchanged in the outside air heat exchanger 47 in the ventilation unit 3 and flows into the air conditioning unit 1.

The mixing temperature sensor 79 may be disposed inside the main body 10 of the air conditioning unit 1. In more detail, the mixing temperature sensor 79 may be installed in the mixing unit 100. The mixing temperature sensor 79 can measure the temperature of the air mixed in the mixing unit 100 by flowing into the outdoor air intake unit 120, the indoor air intake unit 110, and the bypass unit 130, respectively.

The smoke detection sensor 80 may be placed indoors. In more detail, the smoke detection sensor 80 may be installed on the indoor ceiling surface 56. The smoke detection sensor 80 can detect smoke generated indoors (50). If smoke occurs in the room 50 due to a fire, etc., the smoke detection sensor 80 can detect it.

Figure 14 is a control block diagram for controlling an air conditioning system.

Referring to FIG. 14, the air conditioning system may include a control unit 90. The control unit 90 may include a controller 295 that is an air conditioning unit control unit, a ventilation unit control unit, and a chiller unit control unit.

The control unit 90 may further include a central control unit capable of communicating with the controller 295, the ventilation unit control unit, and the chiller unit control unit, respectively. At this time, the central control unit may include a building management system (BMS) of a building equipped with an air conditioning system.

That is, the control unit 90 can control the air conditioning unit 3, ventilation unit 3, and chiller unit 5 through central control, and the air conditioning unit 3, ventilation unit 3, and chiller unit 5 ) can also be controlled individually.

The control unit 90 can control the air conditioning system according to various modes. The control mode of the control unit 90 may include a main mode and a sub mode.

Main mode may mean normal mode, normal board, basic mode, etc. The main mode may refer to the most basic control mode of the air conditioning system. The control unit may enter the main mode when a predetermined time has elapsed after the air conditioning system starts operating. Alternatively, when the required conditions are met, the control unit can enter the main mode.

Submode may mean other modes, spare modes, emergency modes, etc., and may be implemented before or after the main mode. Additionally, it is possible to perform it during the main mode under certain conditions.

The control unit 90 can receive the temperature detected by the temperature sensor 65. In more detail, the control unit 90 controls the temperature measured by at least one of the indoor temperature sensor 70, the supply air temperature sensor 71, the return temperature sensor 72, the outdoor temperature sensor 78, and the mixed temperature sensor 79. can be delivered to each. In addition, the control unit 90 is also capable of receiving and detecting the temperatures measured by the water inlet temperature sensor 63 and the outlet temperature sensor 64.

The control unit 90 can receive and detect the concentration of carbon dioxide measured by the carbon dioxide sensor 73.

The control unit 90 can receive and sense the pressure measured by the static pressure sensor 76.

When smoke is detected by the smoke detection sensor 80, the control unit 90 can receive and detect a smoke generation signal. The control unit 90 may enter the emergency mode when smoke is detected by the smoke detection sensor 80. In emergency mode, the control unit 90 can stop the air conditioning system. In more detail, in the emergency mode, the control unit 90 can stop the air conditioning unit 1, the chiller unit 3, and the ventilation unit 5, respectively.

The control unit 90 can control the coolant valve 62. In more detail, the control unit 90 may control the opening degree of the cooling water valve 62 to adjust the flow rate of cold water flowing through the cold water circulation passage 114. As the opening degree of the cooling water valve 62 increases, the amount of cold water flowing into the heat exchanger 111 and/or the outside air heat exchanger 47 may increase. Accordingly, the temperature of the air heat exchanged in the heat exchanger 111 and/or the outside air heat exchanger 47 may further decrease.

The control unit 90 can control the outdoor air damper 121. In more detail, the control unit 90 may control the opening degree of the outdoor air damper 121 to adjust the amount of outdoor air (OA) flowing into the outdoor air intake unit 120. As the opening degree of the outdoor air damper 121 increases, the amount of outdoor air (OA) flowing into the outdoor air intake unit 120 may increase. Therefore, the proportion of outdoor air (OA) in the air mixed in the mixing unit 100 may increase.

The control unit 90 can control the bypass damper 131. In more detail, the control unit 90 may control the opening degree of the bypass damper 131 to adjust the amount of circulating air (RA) flowing into the bypass unit 130. As the opening degree of the bypass damper 131 increases, the amount of circulating air (RA) flowing into the bypass unit 130 may increase. Therefore, the proportion of the circulating air (RA) that bypasses the heat exchanger 111 in the air mixed in the mixing unit 100 may increase.

The control unit 90 can control the circulation pump 61. In more detail, the control unit 90 may control the flow rate of cold water circulating along the cold water circulation passage 114 by controlling the operating frequency of the circulation pump 61. As the operating frequency of the circulation pump 61 increases, the flow rate of cold water circulating along the cold water circulation passage 114 may increase. Accordingly, the amount of cold water flowing into the heat exchanger 111 and/or the outside air heat exchanger 47 may increase, and the temperature of the air heat exchanged in the heat exchanger 111 and/or the outside air heat exchanger 47 may increase. You can go down.

The control unit 90 can control the blowing mechanism 210. In more detail, the control unit 90 may control the rotation of the blowing fan 211 by controlling the operating frequency of the motor 212 included in the blowing device 210. As the rotation of the blowing fan 211 increases, the flow rate of the supply air (SA) discharged through the outlet 310 increases, thereby increasing the pressure inside the floor duct 59.

That is, the control unit 90 can control the blower 210 to maintain the static pressure in the room 50 set by the user. In addition, the control unit 90 can control the blowing mechanism 210 to vary the amount of air blown out from the outlet 310 and the outlet body 52.

The control unit 90 can control the exhaust damper 23. In more detail, the control unit 90 can control the opening degree of the exhaust damper 23 to adjust the amount of exhaust EA flowing into the exhaust passage 22. As the opening degree of the exhaust damper 23 increases, the amount of exhaust EA flowing from the air conditioning room 20 through the exhaust passage 22 to the exhaust portion 31 of the ventilation unit 3 may increase.

The control unit 90 can control the sub outside air damper 42. In more detail, the control unit 90 can control the opening degree of the sub outside air damper 42 to adjust the amount of outside air (OA) flowing into the outside air inlet 41. As the opening degree of the sub outdoor air damper 42 increases, the amount of outdoor air (OA) flowing into the outdoor air unit 32 through the outdoor air introduction unit 41 may increase.

The control unit 90 can control the sub exhaust damper 39. In more detail, the control unit 90 can control the opening degree of the sub-exhaust damper 39 to adjust the amount of exhaust EA flowing into the exhaust discharge unit 38. As the opening degree of the sub exhaust damper 39 increases, the amount of exhaust EA discharged from the exhaust unit 31 to the outdoors through the exhaust discharge unit 38 may increase.

The control unit 90 can control the mixing damper 35. In more detail, the controller 90 can control the opening degree of the mixing damper 35 to adjust the amount of air passing through the opening portion 34. As the opening degree of the mixing damper 35 increases, the amount of air flowing from the exhaust part 31 to the external air part 32 through the opening part 38 may increase.

The control unit 90 can control the exhaust blower 36. In more detail, the control unit 90 can control the operating frequency of the exhaust blower 36. As the operating frequency of the exhaust blower 36 increases, the air sucked from the air conditioning room 20 into the exhaust unit 31 through the exhaust passage 22 and the air from the exhaust unit 31 through the exhaust discharge unit 38 The amount of air discharged and air flowing from the exhaust unit 31 to the external air unit 32 through the opening part 34 may increase.

The control unit 90 can control the outside air blowing mechanism 37. In more detail, the control unit 90 can control the operating frequency of the outside air blowing device 37. As the operating frequency of the outside air blowing mechanism 37 increases, the air flowing from the exhaust part 31 to the outside air part 32 through the opening part 34 and the outside air part 32 through the outside air introduction part 41 The amount of air sucked and air flowing into the air conditioning unit 1 through the outside air flow path 123 may increase.

The control unit 90 can control the heating heater 77. In more detail, the control unit 90 can control the temperature of the circulating air (RA) inside the air conditioning room 20 by turning the heating heater 77 on or off or controlling the temperature of the heating heater 77.

FIG. 15 is a flowchart showing the operation sequence of the air conditioning system during cooling operation, and FIG. 16 is a flowchart showing the operation sequence of the air conditioning system during heating operation.

The air conditioning system can perform cooling operation or heating operation. The control unit 90 can determine cooling operation or heating operation according to the user's command.

Alternatively, the control unit 90 may determine cooling operation or heating operation depending on the outdoor temperature. For example, in summer, the outdoor temperature is high, so cooling operation can be performed, and in winter, because the outdoor temperature is low, heating operation can be performed. However, it is not limited to this, and it is possible to determine cooling operation or heating operation by considering other factors.

Cooling operation and heating operation may be essentially the same operation in that they are intended to keep the temperature of the room 50 constant.

Meanwhile, the control unit 90 can control the air conditioning system according to the measured temperature (T) and the desired temperature (W).

The measured temperature (T) may be the temperature detected by the temperature sensor 65. In more detail, the measured temperature (T) is detected by any one of the indoor temperature sensor (70), supply air temperature sensor (71), return temperature sensor (72), outdoor temperature sensor (78), and mixed temperature sensor (79). It could be temperature. Preferably, the measured temperature (T) may be a temperature detected by any one of the indoor temperature sensor 70, the supply air temperature sensor 71, and the return temperature sensor 72.

As described above, the indoor temperature sensor 70 may be placed in the room 50 connected to the air conditioning unit 1 through a duct. In more detail, the indoor temperature sensor 70 may be placed in the room 50 connected to the outlet 310 of the air conditioning unit 1 and the floor duct 59.

The supply air temperature sensor 71 and the return temperature sensor 72 may be installed in the duct connecting the air conditioning unit 1 and the room 50. In more detail, the supply air temperature sensor 71 may be placed in the floor duct 59 connecting the outlet 310 of the air conditioning unit 1 and the room 50, and the return temperature sensor 72 may be placed in the air conditioning room 20. ) or may be placed in the selling duct 53 connecting the air conditioning room 20 and the room 50.

The desired temperature (W) may be the temperature of the room 50 desired by the user. The user can input the desired temperature through the interface included in the control unit 290 or central control. Alternatively, the desired temperature (W) may be a basically set temperature.

Referring to FIG. 15, when the cooling operation starts, the control unit 90 may compare the measured temperature (T) and the pre-cooling judgment temperature (A) (S1).

The pre-cooling judgment temperature (A) may be lower than the desired temperature (W). The pre-cooling judgment temperature (A) may vary depending on the desired temperature (W). The pre-cooling judgment temperature (A) may be a temperature as low as a preset value from the desired temperature (W). For example, if the desired temperature (W) is 24°C and the set value is 0.5°C, the pre-cooling judgment temperature (A) may be 23.5°C.

If the measured temperature (T) is less than the pre-cooling judgment temperature (A), the control unit 90 can immediately enter the regular control mode (S300). The on-time control mode (S300) will be described in detail later.

On the other hand, if the measured temperature (T) is equal to or higher than the pre-cooling judgment temperature (A), the control unit 90 may enter the pre-cooling control mode (S100).

The pre-cooling control mode (S100) may be a sub-control mode. In more detail, the pre-cooling control mode (S100) is a mode for preferentially cooling the room (50) before entering the main control mode because the current temperature of the room (50) is too high compared to the desired temperature (W). You can.

Hereinafter, control in the pre-cooling control mode (S100) will be described.

In the pre-cooling control mode (S100), the control unit 90 can control the outside air damper 121 and the exhaust damper 23 to be fully open. Full opening of the damper may mean a state in which the opening degree of the damper is maximum.

When the outside air damper 121 is fully opened, the amount of outdoor outside air (OA) flowing into the air conditioning unit 100 increases, and when the exhaust damper 23 is fully opened, the circulating air (RA) in the air conditioning room 20 increases. Outdoor leaks may increase. That is, in the air conditioning system, the inflow of outside air (OA) and the outflow of exhaust air (EA) are maximized to ensure smooth ventilation of the room 50, so that warmed air can be discharged from the room 50.

Additionally, in the pre-cooling control mode (S100), the control unit 90 may control the bypass damper 131 to be fully closed. Full close of the damper may mean a state in which the opening degree of the damper is completely closed.

When the bypass damper 131 is fully closed, the circulating air (RA) flowing into the mixing unit 100 through the bypass unit 130 may be blocked. That is, the hot circulating air (RA) circulating in the room 50 may not be included in the supply air (SA). Accordingly, the temperature of the supply air (SA) blown out through the outlet 310 and supplied to the room 50 through the floor duct 59 can be lowered, and thus the room 50 can be cooled.

Additionally, in the pre-cooling control mode (S100), the controller 90 can control the coolant valve 62 to be fully opened. Full opening of the valve may mean a state in which the opening degree of the valve is maximum.

When the cooling water valve 62 is fully opened, the flow rate of cold water supplied from the chiller unit 5 and circulating along the cold water circulation passage 114 may increase. Therefore, the flow rate of cold water flowing into the heat exchanger 111 through the water flow path 115 may increase, and heat exchange between cold water and air may occur more actively in the heat exchanger 111. That is, the air sucked into the indoor air intake unit 110 is sufficiently cooled in the heat exchanger 111 and can be included in the supply air (SA), and the supply air (SA) is supplied to the room 50 through the floor duct 59. supply, the room 50 can be cooled.

Additionally, in the pre-cooling control mode (S100), the control unit 90 can turn on the blower 210.

After implementing the pre-cooling control mode (S100), the control unit 90 can again compare the measured temperature (T) and the pre-cooling judgment temperature (A) (S1).

As the pre-cooling control mode (S100) is implemented, the temperature of the room 50 may decrease, and after a certain period of time, the measured temperature (T) may become lower than the pre-cooling judgment temperature (A). In this case, the control unit 90 may enter the on-time control mode (S300).

Meanwhile, referring to FIG. 16, when the heating operation starts, the control unit 90 can compare the measured temperature (T) and the preheating judgment temperature (B) (S2).

The preheating judgment temperature (B) may be a higher temperature than the desired temperature (W). The preheating judgment temperature (B) may vary depending on the desired temperature (W). The preheating judgment temperature (B) may be as high as a preset value from the desired temperature (W). For example, if the desired temperature (W) is 24°C and the set value is 0.5°C, the preheating judgment temperature (B) may be 24.5°C.

If the measured temperature (T) exceeds the preheating judgment temperature (B), the control unit 90 can immediately enter the regular control mode (S300).

On the other hand, if the measured temperature (T) is equal to or higher than the preheating judgment temperature (B), the control unit 90 may enter the heating preheating control mode (S200).

The heating preheating control mode (S200) may be a sub-control mode. In more detail, the heating preheating control mode (S200) is a mode for preferentially heating the room (50) before entering the main mode because the current temperature of the room (50) is too low compared to the desired temperature (W). You can.

Hereinafter, control in the heating preheating control mode (S200) will be described.

In the heating preheating control mode (S200), the control unit 90 can control the outside air damper 121 and the exhaust damper 23 to be fully closed.

When the outside air damper 121 is fully closed, outdoor outside air (OA) does not flow into the air conditioning unit 100, and when the exhaust damper 23 is fully closed, the circulating air (RA) in the air conditioning room 20 flows out to the outdoors. It may not work. That is, since the inflow of outside air (OA) and the outflow of exhaust air (EA) do not occur in the air conditioning system, the heated air in the room 50 continues to circulate and the temperature of the room 50 can increase.

Additionally, in the heating preheating control mode (S200), the controller 90 can control the cooling water valve 62 to be fully closed. Full close of the valve may mean a state in which the opening degree of the valve is completely closed.

When the cooling water valve 62 is fully closed, the cold water supplied from the chiller unit 5 may not circulate along the cold water circulation passage 114. Accordingly, cold water may not flow into the heat exchanger 111 through the water intake passage 115, and heat exchange between cold water and air may not occur in the heat exchanger 111. That is, the air sucked into the indoor air intake unit 110 may be included in the supply air (SA) without being cooled in the heat exchanger 111, and the supply air (SA) may be supplied indoors (50) through the floor duct 59. ), so that the room 50 can be heated.

Additionally, in the heating preheating control mode (S200), the controller 90 may control the bypass damper 131 to be fully closed. As described above, the coolant valve 62 is currently fully closed and the air sucked into the indoor air intake unit 110 does not exchange heat in the heat exchanger 111, so there is no need to bypass the heat exchanger 111.

Additionally, in the heating preheating control mode (S200), the control unit 90 can turn on the blower 210.

Additionally, in the heating preheating control mode (S200), the control unit 90 can turn on the heating heater 77.

When the heating heater 77 is turned on, the temperature of the air conditioning room 20 increases, so the temperature of the air flowing into the air conditioning unit 1 through the indoor air intake unit 110 may increase. Accordingly, the temperature of the air flowing into the room 50 from the outlet 310 through the floor duct 59 increases, thereby heating the room 50.

After implementing the heating preheating control mode (S200), the control unit 90 can again compare the measured temperature (T) and the preheating judgment temperature (B) (S2).

As the heating preheating control mode (S200) is implemented, the temperature of the room 50 may rise, and after a certain period of time, the measured temperature (T) may become higher than the preheating judgment temperature (B). In this case, the control unit 90 may enter the on-time control mode (S300).

Figure 17 is a flowchart showing the operation sequence of the air conditioning system in the regular control mode.

The on-time control mode (S300) may be the main control mode. The regular control mode (S300) may be a temperature-based mode for maintaining the temperature of the room 50 at a constant desired temperature (W).

Hereinafter, control in the on-time control mode (S300) will be described.

Referring to FIG. 17, when entering the on-time control mode (S300), the control unit 90 can control the outside air damper 121 and the exhaust damper 23 to a preset opening degree, and the bypass damper 131 and the coolant. The valve 62 can be fully opened (S301).

Additionally, if the heating heater 77 was previously turned on, the control unit 90 may turn off the heating heater 77 when entering the on-time control mode.

The control unit 90 can compare the measured temperature (T) and the lower limit setting value (W1) of the desired temperature (S310).

The lower limit set value (W1) of the desired temperature may be a temperature obtained by subtracting a predetermined set value from the desired temperature (W). For example, if the desired temperature (W) is 24°C and the set value is 1°C, the lower limit set value (W1) of the desired temperature may be 23°C.

If the measured temperature (T) is greater than or equal to the lower limit setting value (W1) of the desired temperature, the control unit 90 may compare the measured temperature (T) and the upper limit setting value (W2) of the desired temperature (S320).

The upper limit setting value (W2) of the desired temperature may be the temperature obtained by adding a predetermined setting value to the desired temperature (W). For example, if the desired temperature (W) is 24°C and the set point is 1°C, the desired upper temperature set point (W2) may be 25°C.

If the measured temperature (T) is less than the lower limit setting value (W1) of the desired temperature, the control unit 90 may control the bypass damper 131 with priority over the coolant coil 62.

If the measured temperature (T) is less than the lower limit set value (W1) of the desired temperature, the control unit 90 operates until the measured temperature (T) is greater than the lower limit set value (W1) of the desired temperature or until the bypass damper 131 is fully open. The opening degree of the bypass damper 131 may be increased by a first set opening degree at a first predetermined period.

If the measured temperature (T) is less than the lower limit set value (W1) of the desired temperature and the bypass damper 131 is fully open, the control unit 90 controls the coolant valve when the measured temperature (T) is greater than or equal to the lower limit set value (W1) of the desired temperature. The opening degree of the coolant valve 62 may be decreased by the second set opening degree at a second predetermined cycle until (62) is fully closed.

In more detail, if the measured temperature (T) is less than the lower limit setting value (W1) of the desired temperature, the control unit 90 may increase the opening degree of the bypass damper 131 by the preset first set opening degree (S311). For example, if the first set opening degree is 10% of the total opening degree, the control unit 90 may increase the opening degree of the bypass damper 131 by 10%.

When the opening degree of the bypass damper 131 increases, the amount of circulating air (RA) flowing into the air conditioning unit 1 through the bypass unit 130 increases, so the temperature of the supply air (SA) may increase, thereby increasing the indoor air temperature. (50) The temperature may rise. Therefore, the measured temperature (T) may increase.

When the opening degree of the bypass damper 131 increases by the first set opening degree, the control unit 90 can compare the measured temperature (T) and the desired temperature lower limit setting value (W1) again (S312).

At this time, if the measured temperature (T) is equal to or higher than the desired temperature lower limit setting value (W1), the control unit 90 may compare the measured temperature (T) with the desired temperature upper limit setting value (W2) (S320). On the other hand, if the measured temperature (T) is less than the lower limit setting value (W1) of the desired temperature, the control unit 90 may determine whether the bypass damper 131 is fully open (S313).

When the bypass damper 131 is not fully open, the control unit 90 may further increase the opening degree of the bypass damper 131 by the first set opening degree (S311). At this time, the opening degree of the bypass damper 131 may be increased by the first set opening degree according to the first predetermined period. For example, if the first predetermined period is 3 minutes and the first set opening degree is 10%, the opening degree of the bypass damper 131 increases by 10%, and after 3 minutes, the opening degree of the bypass damper 131 increases by 10%. It can be.

That is, the control steps of S311 to S313 are cycled according to the first predetermined period, and the opening degree of the bypass damper 131 may gradually increase.

When the bypass damper 131 is fully opened, the control unit 90 may reduce the opening degree of the coolant valve 62 by the second set opening degree (S314). That is, the opening degree of the bypass damper 131 is first increased, and if the measured temperature (T) is still less than the lower limit setting value (W1) of the desired temperature even though the bypass damper 131 is fully opened, the coolant valve 62 is opened. You can control it to raise the indoor temperature.

When the opening degree of the cooling water valve 62 is reduced, the amount of cold water flowing into the heat exchanger 111 through the water flow path 115 decreases, so that the air flowing into the indoor air intake unit 110 flows from the heat exchanger 111. Could be less cooled. Accordingly, the temperature of the supply air (SA) may rise, which may increase the temperature of the room 50 and thus the measured temperature (T).

When the opening degree of the coolant valve 62 is reduced by the second set opening degree, the control unit 90 can compare the measured temperature (T) and the desired temperature lower limit setting value (W1) again (S315).

At this time, if the measured temperature (T) is equal to or higher than the desired temperature lower limit setting value (W1), the control unit 90 may compare the measured temperature (T) with the desired temperature upper limit setting value (W2) (S320). On the other hand, if the measured temperature (T) is less than the desired temperature lower limit set value (W1), the control unit 90 may further reduce the opening degree of the coolant valve 62 by the second set opening degree (S314).

At this time, the opening degree of the coolant valve 62 may be reduced by the second set opening degree according to the second predetermined cycle. For example, if the second predetermined period is 3 minutes and the second set opening degree is 10%, the opening degree of the coolant valve 62 may be reduced by 10%, and after 3 minutes, the opening degree of the coolant valve 62 may be further reduced by 10%. there is.

That is, the control steps of S314 to S315 are cycled according to the second predetermined cycle, and the opening degree of the coolant valve 62 may gradually decrease.

Meanwhile, the control unit 90 can compare the measured temperature (T) and the desired temperature upper limit setting value (W2) (S320).

If the measured temperature (T) exceeds the upper limit setting value (W2) of the desired temperature, the control unit 90 may control the coolant valve 62 with priority over the bypass damper 131.

If the measured temperature (T) exceeds the upper limit setting value (W2) of the desired temperature, the control unit 90 supplies coolant until the measured temperature (T) is below the upper limit setting value (W2) of the desired temperature or the coolant valve 62 is fully open. The opening degree of the valve 62 may be increased by a third set opening degree at a third predetermined cycle.

If the measured temperature (T) exceeds the upper limit setting value (W2) of the desired temperature and the cooling water valve 62 is fully open, the control unit 90 determines that the measured temperature (T) is less than or equal to the upper limit setting value (W2) of the desired temperature or the bypass damper. The opening degree of the bypass damper 131 may be decreased by the fourth set opening degree at the fourth predetermined period until (131) is fully closed.

In more detail, if the measured temperature (T) exceeds the upper limit setting value (W2) of the desired temperature, the control unit 90 may increase the opening degree of the coolant valve 62 by the preset third set opening degree (S321). For example, if the third set opening degree is 10% of the total opening degree, the controller 90 may increase the opening degree of the coolant valve 62 by 10%.

As the opening degree of the cooling water valve 62 increases, the amount of cold water flowing into the heat exchanger 111 through the water flow path 115 increases, so the air flowing into the indoor air intake unit 110 flows from the heat exchanger 111. Could be more cooled. Accordingly, the temperature of the supply air (SA) may decrease, which may lower the temperature of the room 50 and the measured temperature (T).

When the opening degree of the coolant valve 62 increases by the third set opening degree, the control unit 90 can again compare the measured temperature (T) and the desired temperature upper limit setting value (W2) (S322).

At this time, if the measured temperature (T) is less than or equal to the upper limit setting value (W2) of the desired temperature, the control unit 90 may compare the measured temperature (T) with the lower limit setting value (W2) of the desired temperature (S310). On the other hand, if the measured temperature (T) exceeds the upper limit setting value (W2) of the desired temperature (W), the control unit 90 may determine whether the coolant valve 62 is fully open (S323).

If the coolant valve 62 is not fully open, the controller 90 may further increase the opening degree of the coolant valve 62 by the third set opening degree (S321). At this time, the opening degree of the coolant valve 62 may be increased by the third set opening degree according to the third predetermined period. For example, if the third predetermined period is 3 minutes and the third set opening degree is 10%, the opening degree of the coolant valve 62 may be increased by 10%, and after 3 minutes, the opening degree of the coolant valve 62 may be further increased by 10%. there is.

That is, the control steps of S321 to S323 are cycled according to the third predetermined cycle, and the opening degree of the coolant valve 62 may gradually increase.

When the coolant valve 62 is fully opened, the control unit 90 may reduce the opening degree of the bypass damper 131 by the fourth set opening degree (S324). That is, the opening degree of the coolant valve 62 is preferentially increased, and if the measured temperature (T) still exceeds the upper limit setting value (W2) of the desired temperature even though the coolant valve 62 is fully opened, the bypass damper 131 is controlled. This can lower the indoor temperature.

When the opening degree of the bypass damper 131 is reduced, the amount of circulating air (RA) flowing into the air conditioning unit 1 through the bypass unit 130 decreases, so the temperature of the supply air (SA) can decrease, thereby lowering the temperature of the indoor air. (50) The temperature may decrease. Therefore, the measured temperature (T) can be lowered.

When the opening degree of the bypass damper 131 is reduced by the fourth set opening degree, the control unit 90 can compare the measured temperature (T) and the desired temperature upper limit setting value (W2) again (S325).

At this time, if the measured temperature (T) is below the desired temperature upper limit setting value (W2), the control unit 90 can compare the measured temperature (T) and the desired temperature lower limit setting value (W1) (S310). On the other hand, if the measured temperature (T) exceeds the desired temperature upper limit setting value (W2), the control unit 90 may further reduce the opening degree of the bypass damper 131 by the fourth set opening degree (S324).

At this time, the opening degree of the bypass damper 131 may be reduced by the fourth set opening degree according to the fourth predetermined period. For example, if the fourth predetermined period is 3 minutes and the fourth set opening degree is 10%, the opening degree of the bypass damper 131 is reduced by 10%, and after 3 minutes, the opening degree of the bypass damper 131 is further reduced by 10%. It can be.

That is, the control steps of S324 to S325 are cycled according to the fourth predetermined cycle, and the opening degree of the bypass damper 130 may gradually decrease.

In the regular control mode (S300), the control unit 90 can continue to control the air conditioning system by comparing the measured temperature (T) and the desired temperature (W). As a result, the temperature of the room 50 can be kept constant at the desired temperature (W).

Meanwhile, as described above, the sub-mode may include a pre-cooling control mode (S100) and a heating pre-heating control mode (S200). In addition, the sub-mode may further include a carbon dioxide control mode and a static pressure control mode.

Hereinafter, the carbon dioxide control mode will be described.

The carbon dioxide concentration in the room 50 may continuously increase due to the breathing of people active in the room 50. In other words, the carbon dioxide concentration in circulating air (RA) may gradually increase. The carbon dioxide control mode may be a mode for controlling the carbon dioxide concentration in the room 50.

The carbon dioxide control mode can be implemented simultaneously with the precooling control mode (S100), the heating preheating control mode (S200), and the on-time control mode (S300). The carbon dioxide control mode can be performed independently of the precooling control mode (S100), the heating preheating control mode (S200), and the on-time control mode (S300).

In the carbon dioxide control mode, the control unit 90 can control the outside air damper 121 and the exhaust damper 23 according to the measured concentration (D) detected by the carbon dioxide sensor 73, which measures the concentration of carbon dioxide in the air. .

In more detail, the control unit 90 may increase the opening degrees of the outside air damper 121 and the exhaust damper 23 when the measured concentration D is higher than the preset set concentration. Preferably, the control unit 90 can fully open the outside air damper 121 and the exhaust damper 23.

When the opening degree of the exhaust damper 23 increases, the circulating air (RA) circulated from the room 50 to the air conditioning room 20 through the selling duct 53 discharges to the outside through the exhaust passage 22 (EA). ) may increase. Therefore, the proportion of the circulating air (RA) flowing into the air conditioning unit (1) through the indoor air intake unit 110 and/or the bypass unit 130 in the supply air (SA) is reduced, and the carbon dioxide in the supply air (SA) is reduced. Concentration may be lowered.

Additionally, as the opening degree of the outside air damper 121 increases, the amount of outside air (OA) flowing into the air conditioning unit 1 through the outside air intake unit 120 may increase. The carbon dioxide concentration of outdoor air (OA) may be relatively low compared to indoor air (50). Therefore, the proportion of outside air (OA) in supply air (SA) increases, and the carbon dioxide concentration in supply air (SA) may decrease.

That is, when the opening degree of the outside air damper 121 and the exhaust damper 23 increases, the carbon dioxide concentration of the supply air (SA) flowing into the room 50 through the floor duct 59 from the outlet 310 decreases, so that the indoor ( 50) The carbon dioxide concentration can be lowered.

Hereinafter, the constant pressure control mode will be described.

Air flowing from the outlet 310 to the floor duct 59 may be introduced into the room 50 through the outlet body 52. At this time, it is preferable that the pressure of the supply air (SA) flowing from the outlet body 52 to the room 50 is maintained at a preset positive pressure. If dust, etc. accumulates in the outlet body 52, air supply to the room 50 through the outlet body 52 may not be smooth and the pressure inside the floor duct 59 may increase. The constant pressure control mode may be a mode for maintaining the pressure at a constant constant pressure.

The constant pressure control mode can be implemented simultaneously with the precooling control mode (S100), the heating preheating control mode (S200), and the on-time control mode (S300). The constant pressure control mode can be performed independently of the precooling control mode (S100), the heating preheating control mode (S200), and the on-time control mode (S300).

In the static pressure control mode, the control unit 90 may control the operating frequency of the blowing mechanism 210 according to the measured pressure (P) detected by the static pressure sensor 76.

At this time, the measured pressure (P) is measured by the first static pressure sensor 75 disposed at the end farthest from the outlet 310 of the floor duct 59, and the first static pressure sensor 75 disposed between the outlet 310 and the first static pressure sensor 75. It may be the average pressure of the pressures measured by the second static pressure sensor 74. Since the pressure within the floor duct 59 may vary depending on the distance from the outlet 310, the pressure within the floor duct can be measured more accurately through the average pressure of the first static pressure sensor 75 and the second static pressure sensor 74. there is.

The control unit 90 may control the operating frequency of the blowing mechanism 210 to increase when the measured pressure P is lower than a preset static pressure.

As the operating frequency of the blower 210 increases, the volume of air blown through the outlet 310 and the outlet body 52 may increase, and the pressure within the floor duct 59 may increase. As a result, pressure drop factors such as dust accumulated in the outlet body 52 can be removed.

According to a preferred embodiment of the present invention, heating of the room may be possible by increasing the temperature of air introduced into the air conditioning unit by the heating heater.

Additionally, indoor heating may be possible by controlling the amount of cold water flowing into the heat exchanger.

Additionally, indoor heating may be possible by blocking the inflow of outside air and circulating indoor air.

The above description is merely an illustrative explanation of the technical idea of the present invention, and various modifications and variations will be possible to those skilled in the art without departing from the essential characteristics of the present invention.

Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but rather to explain it, and the scope of the technical idea of the present invention is not limited by these embodiments.

The scope of protection of the present invention should be interpreted in accordance with the claims below, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of rights of the present invention.

1: Air conditioning unit 3: Ventilation unit
5: Chiller unit 10: Main body
20: air conditioning room 23: exhaust damper
50: Indoor 52: Outlet body
53: Selling duct 54: Inlet body
59: floor duct 65: temperature sensor
73: carbon dioxide sensor 76: static pressure sensor
77: Heating heater 90: Control unit
110: indoor air intake 111: heat exchanger
114: cold water circulation passage 120: external air intake section
121: External air damper 130: Bypass unit
131: bypass damper 210: blowing mechanism
310: outlet

Claims (12)

An air conditioning unit including an indoor air intake unit, a heat exchanger for exchanging heat with air introduced into the indoor air intake unit, and a bypass unit through which air is introduced by bypassing the heat exchanger;
A heating heater disposed in the air conditioning room where the air conditioning unit is installed;
A chiller unit connected to the heat exchanger and a cold water circulation passage;
A bypass damper installed in the bypass unit;
A cooling water valve installed in the cold water circulation passage; A temperature sensor installed in at least one of the air conditioning room in which the air conditioning unit is installed and the room and the duct connecting the air conditioning room and the room to measure at least one of return temperature, room temperature, and supply air temperature; And
An air conditioning system comprising a control unit that controls the cooling water valve to be fully closed and turns on the heating heater in a heating preheating control mode. According to claim 1,
The control unit is an air conditioning system that controls the bypass damper to be fully closed in a heating preheating mode. According to claim 1,
Further comprising an exhaust damper disposed in the air conditioning room,
The air conditioning unit further includes an outside air intake unit installed with an outside air damper,
The control unit is an air conditioning system that controls the exhaust damper and the outside air damper. According to claim 3,
The control unit,
An air conditioning system that controls the outside air damper and the exhaust damper to be fully closed when in the heating preheating control mode. According to claim 1,
The control unit,
If the measured temperature detected by the temperature sensor is below the preheating judgment temperature, the heating preheating control mode is implemented,
An air conditioning system that enters a regular control mode to control the bypass damper and the coolant valve according to the measured temperature and the desired temperature when the measured temperature exceeds the preheating judgment temperature. According to claim 3,
The control unit,
If the measured temperature detected by the temperature sensor exceeds the preheating judgment temperature, when entering the regular control mode to control the bypass damper and the coolant valve according to the measured temperature and the desired temperature, set the outside air damper and the exhaust damper, respectively. An air conditioning system that controls the opening degree, controls each of the bypass damper and the cooling water valve to be fully open, and turns off the heating heater. According to claim 5,
The control unit,
In the regular control mode, if the measured temperature is less than the lower limit set value of the desired temperature, the air conditioning system controls the bypass damper with priority over the coolant coil. According to claim 5,
The control unit,
In the regular control mode, if the measured temperature is less than the lower limit set value of the desired temperature, the opening degree of the bypass damper is adjusted to the first level until the measured temperature is greater than the lower limit set value of the desired temperature or the bypass damper is fully open. An air conditioning system that increases the first set opening at predetermined intervals. According to claim 8,
The control unit,
If the measured temperature is less than the lower limit set value of the desired temperature and the bypass damper is fully open, the opening degree of the coolant valve is adjusted to a second set cycle until the measured temperature is greater than the lower limit set value or the coolant valve is fully closed. An air conditioning system that reduces the opening degree by setting. According to claim 5,
The control unit,
In the regular control mode, if the measured temperature exceeds the upper limit setting value of the desired temperature, the air conditioning system controls the cooling water valve with priority over the bypass damper. According to claim 5,
The control unit,
In the regular control mode, if the measured temperature exceeds the upper limit set value of the desired temperature, the opening degree of the coolant valve is adjusted to a third predetermined cycle until the measured temperature is less than or equal to the upper limit set value of the desired temperature or the coolant valve is fully open. An air conditioning system that increases the third setting in degrees. According to claim 11,
The control unit,
If the measured temperature exceeds the upper limit setting value of the desired temperature and the coolant valve is fully open, the opening degree of the bypass damper is controlled until the measured temperature is below the upper limit setting value of the desired temperature or the bypass damper is fully closed. 4An air conditioning system that reduces the fourth set opening degree at predetermined intervals.

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