JP2018194199A - Air conditioning system - Google Patents

Abstract

To provide an air conditioning system which can properly perform air conditioning in an indoor space by a ceiling side air conditioning facility and a floor side perimeter air conditioning facility, and which can achieve high efficiency of a system configuration by omitting a dew condensation water discharge facility such as a drain discharge pipe and the like which are troublesome to install and which are not frequently used.SOLUTION: An air conditioning system includes: a ceiling side air conditioning facility 10 which blows air conditioning air SA1 to an indoor space A from a ceiling side via a perforated ceiling material 11 or which radiates heat or absorbs heat with respect to the indoor space A from the ceiling side via a radiation ceiling material 11; and a floor side perimeter air conditioning facility 20 for blowing air conditioning air SA2 to a perimeter zone P in the indoor space A from a floor side. The floor side perimeter air conditioning facility 20 is constituted so as to execute: a heating operation for heating air RA2 and blowing it to the perimeter zone P; and a dew condensation prevention cooling operation for cooling air RA2 under a dew condensation prevention operation condition in which dew condensation does not generate and blowing it to the perimeter zone P.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an air conditioning system that performs air conditioning of an indoor space.

  As an air conditioning system for air conditioning an indoor space such as an office room of an office building, air conditioned air is blown from the ceiling side to the indoor space through a perforated ceiling material (hereinafter, such a blowing state may be referred to as exudation). Or an air conditioning system provided with a ceiling-side air conditioning facility that radiates or absorbs heat from the ceiling side to the indoor space via a radiation ceiling material (see, for example, Patent Documents 1 and 2). ).

  Such an air-conditioning system is designed to prevent occupants from being drafted by oozing out air-conditioned air from the perforated ceiling material by the ceiling-side air conditioning equipment and heat radiation or heat absorption from the radiation ceiling material. Space can be air-conditioned. This ceiling-side air conditioning equipment is somewhat poor at heating, in which warm air hardly reaches the lower layer, compared to cooling in which cool air naturally falls.

  By the way, in the air conditioning system provided with the ceiling side air conditioning equipment as described above, a floor side perimeter air conditioning equipment for blowing conditioned air from the floor side to a perimeter zone having a large influence of the outdoor environment such as a window zone in the indoor space is provided. There are cases (see, for example, Patent Document 1).

  The floor-side perimeter air conditioning equipment performs a heating operation in which air is heated and air is blown to the perimeter zone when a heating load is generated by low temperature outside air such as in winter. On the other hand, when a cooling load is generated by solar heat or high temperature outside air in summer or the like, a cooling operation is performed in which the air is cooled and the cooling air is blown to the perimeter zone.

  Here, in the heating operation of the ceiling-side air conditioning equipment, heating of the indoor space is not performed efficiently, so the ceiling-side air conditioning equipment alone cannot adequately cover the heating load of the perimeter zone. There are relatively many cases where the heating load of the indoor space including the perimeter zone is covered by adding heating by means of. Conversely, in the cooling operation of the ceiling-side air conditioning equipment, since the cooling of the indoor space is efficiently performed using the natural descent of the cold air, in many cases the cooling load of the perimeter zone can be covered only by the ceiling-side air conditioning equipment, The frequency of cooling by the floor side perimeter air conditioning equipment is relatively low.

  Conventionally, such a floor perimeter air conditioning facility has been provided with a condensed water discharge facility such as a drain exhaust pipe for discharging condensed water generated when air is cooled in a cooling operation.

JP 2013-195047 A JP, 2006-217581, A

However, it is necessary to install dew condensation water discharge equipment such as drain pipes appropriately in a state that penetrates the outer wall of the building so as to discharge dew condensation water outside the building without leaking the floor under the building, etc. There is an inconvenience that it is troublesome to install both the plan and the construction.
In addition, in the air conditioning system having the ceiling side air conditioning equipment and the floor side perimeter air conditioning equipment as described above, the floor side perimeter air conditioning equipment needs to be cooled relatively less frequently. The frequency of use of condensed water discharge facilities such as drain pipes provided correspondingly is relatively low.

  In view of this situation, the main problem of the present invention is that drainage pipes and the like that are difficult to install and use less frequently while the indoor space can be appropriately air-conditioned by the ceiling-side air conditioning equipment and the floor-side perimeter air-conditioning equipment. The point is to provide an air conditioning system that can eliminate the condensed water discharge facility and improve the efficiency of the system configuration.

A first characteristic configuration of the present invention is an air conditioning system that blows conditioned air from a ceiling side to an indoor space via a perforated ceiling material, or from a ceiling side to an indoor space via a radiant ceiling material. A ceiling-side air conditioner that radiates or absorbs heat; and
The perimeter zone of the indoor space is equipped with a floor side perimeter air conditioning equipment that blows conditioned air from the floor side,
The floor-side perimeter air conditioning equipment can perform heating operation that heats air and blows air to the perimeter zone, and anti-condensation cooling operation that cools air and blows air to the perimeter zone under the dew condensation prevention operation conditions where condensation does not occur It is in the point which is comprised.

  According to this configuration, the floor-side perimeter air conditioning equipment can perform the anti-condensation cooling operation in which air is cooled and blown to the perimeter zone under the anti-condensation operation conditions in which dew condensation does not occur. By performing the operation, it is possible to cool the perimeter zone while preventing the generation of condensed water. Therefore, it is possible to omit the dew condensation water discharge facility such as a drain exhaust pipe which is troublesome to install and is less frequently used.

And according to this structure, about the heating load of the indoor space which cannot be covered only by the ceiling side air conditioner, the floor side perimeter air conditioner performs the heating operation for the heating from the ceiling side by the ceiling side air conditioner and the floor side Heating to the perimeter zone can be added and covered appropriately.
Furthermore, with regard to the cooling load of the indoor space, if necessary, the floor side perimeter air conditioning equipment performs condensation prevention cooling operation for cooling from the ceiling side air conditioning equipment to cool the floor space from the floor side to the perimeter zone. Can be covered appropriately.

  Therefore, while the indoor space can be properly air-conditioned by the ceiling-side air conditioning equipment and the floor-side perimeter air-conditioning equipment, the condensate drainage equipment such as drain pipes, which are cumbersome to install and use less frequently, are omitted. The efficiency of the configuration can be improved.

  The 2nd characteristic structure of this invention exists in the point by which the ventilation speed in the said dew condensation prevention cooling operation is set larger than the ventilation speed in the said heating operation in the said floor side perimeter air conditioning equipment.

According to this configuration, in the floor-side perimeter air conditioning equipment, in the heating operation, the perimeter zone can be efficiently heated in a form in which the heated air is raised relatively slowly from the floor side using the difference in gravity.
In the condensation prevention cooling operation, it is possible to appropriately cool the perimeter zone in a form in which the air blowing speed is increased compared to the heating operation and the air arrival distance from the floor side to the upper layer side is extended against the gravity difference. .
In addition, by increasing the air blowing speed in the condensation prevention cooling operation in this way, the operation condition of the condensation prevention cooling operation can be further set to a safer condition for preventing the occurrence of condensation. It is possible to more reliably prevent the occurrence of condensation.

The third characteristic configuration of the present invention is configured such that the floor-side perimeter air conditioning equipment sucks room air from an air suction port and regulates the temperature and blows it out as air-conditioned air from an air outlet.
The air inlet and the air outlet are provided in an arrangement state in which the air inlet is located on the outdoor side of the air outlet.

According to this configuration, when heating operation is performed in the floor side perimeter air conditioning equipment in winter or the like, the indoor air on the outdoor side (window side) that is at the lowest temperature is sucked from the air inlet and heated to the air outlet By blowing out from, the thermal environment of the perimeter zone can be improved efficiently.
In addition, when performing anti-condensation cooling operation in the floor side perimeter air conditioning equipment in the summer, etc., the indoor air on the outdoor side (window side) that is at the highest temperature is sucked from the air inlet and cooled to blow out from the air outlet. Thus, the thermal environment of the perimeter zone can be improved efficiently.
Moreover, in this condensation prevention cooling operation, the indoor air on the outdoor side (window side), which is the hottest, is used as the air to be cooled, so that it is easy to ensure a relatively large difference from the dew point temperature. It is possible to more reliably prevent the generation of condensed water by cooling to the following.

  A fourth characteristic configuration of the present invention is that a dew condensation water evaporation means capable of evaporating the dew condensation water generated in the dew condensation prevention cooling operation is provided.

  According to this configuration, even when a slight amount of condensed water is generated in the condensation prevention cooling operation, the condensed water can be evaporated by the condensed water evaporation means.

  According to a fifth characteristic configuration of the present invention, in the floor side perimeter air conditioning equipment, the condensed water generated in the condensation prevention cooling operation can be heated and evaporated, and the air can be additionally heated in the heating operation. An electric heater is provided as the condensed water evaporation means.

According to this structure, when dew condensation water generate | occur | produces by the dew condensation prevention cooling operation, the dew condensation water can be heated with the electric heater as a dew condensation water evaporation means, and can be evaporated appropriately.
Furthermore, at the time of a high heating load such as when the heating operation is started, the amount of heating heat can be supplemented by additionally heating air with an electric heater as a condensed water evaporation means.

6th characteristic structure of this invention is comprised so that the said floor side perimeter air-conditioning equipment may inhale indoor air from an air suction inlet, it regulates temperature, and it blows out as conditioned air from an air blower outlet,
The dew condensation water evaporating means is configured to increase the amount of room air sucked from the air suction port and to evaporate the dew condensation water by exposing the dew condensation water to the increased room air.

According to this configuration, when dew condensation water is generated in the dew condensation prevention cooling operation of the floor side perimeter air conditioning equipment, the amount of room air sucked from the air suction port is increased by the dew condensation water evaporation means, and this is increased. The condensed water can be evaporated by exposing the condensed water to the indoor air.
Therefore, in the floor side perimeter air conditioning equipment, the condensed water can be evaporated by using the indoor air (return air) sucked to air-condition the perimeter zone, and the condensed water can be used by utilizing the original function of the floor side perimeter air conditioning equipment. Can be evaporated.
In addition, since the indoor air sucked from the air suction port during the condensation prevention cooling operation is air in a perimeter zone that is relatively high in temperature and suitable for the evaporation of condensed water, the condensed water can be efficiently evaporated.

(A) Conceptual diagram of air conditioning system, (b) Configuration diagram of floor perimeter air conditioning equipment Diagram showing the operation mode of the air conditioning system The block diagram of the floor side perimeter air-conditioning equipment of another embodiment

An embodiment of an air-conditioning system according to the present invention will be described with reference to the drawings.
As shown in FIG. 1A, this air conditioning system includes a ceiling side air conditioning facility 10 that air-conditions the indoor space A from the ceiling side, and a floor that air-conditions the perimeter zone P such as the window W of the indoor space A from the floor side. A side perimeter air conditioning facility 20 and a control device 30 for controlling the operating state of the air conditioning system are provided.

  As shown in FIG. 2, this air conditioning system includes a “heating / heating mode” in which both the ceiling-side air conditioner 10 and the floor-side perimeter air-conditioner 20 perform a heating operation, and the ceiling-side air conditioner 10 has a cooling operation. And the floor side perimeter air conditioner 20 performs the heating operation, and the ceiling side air conditioner 10 executes the cooling operation and the floor side perimeter air conditioner 20 performs the condensation prevention cooling operation (condensation water). Each of the “cooling / cooling mode” operation modes can be executed. Of course, in addition to each of these operation modes, the ceiling-side air conditioning equipment 10 can execute heating operation and cooling operation independently, and the floor-side perimeter air-conditioning equipment 20 also executes heating operation and condensation prevention cooling operation alone. can do.

For convenience, in the present embodiment, a case where the air conditioning system executes each operation mode based on an operation command from the control device 30 will be described as an example, but for each of the ceiling side air conditioning facility 10 and the floor side perimeter air conditioning facility 20 The air conditioning system may execute each operation mode based on individual user operations or the like.
Hereinafter, each operation mode of the ceiling side air conditioner 10, the floor side perimeter air conditioner 20, and the air conditioning system will be described in detail.

<Ceiling-side air conditioning equipment>
As shown in FIG. 1 (a), the ceiling-side air conditioning facility 10 air-conditions the ceiling chamber 12 partitioned from the indoor space A by an air-conditioning ceiling material 11 disposed on the lower side of the slab S2 on the upper floor side. Air SA <b> 1 is supplied and the indoor space A is air-conditioned from the ceiling side via the air-conditioning ceiling material 11.
Although illustration is omitted, outside air can be appropriately introduced into the ceiling chamber 12 through an outside air introduction path (not shown). Moreover, the drooping wall K etc. can be arrange | positioned in the boundary part of the perimeter zone P in the indoor space A as needed.

For example, the ceiling-side air conditioning facility 10 includes an air-conditioning indoor unit 13 that can be blown as conditioned air SA1 in the ceiling chamber 12 after the return air RA1 (room air) is sucked and temperature-controlled through the ceiling-side return port 14. Configured. Heating operation in which the return air RA1 is heated by the air conditioning indoor unit 13 and the heated air is supplied to the ceiling chamber 12 as the conditioned air SA1, the return air RA1 is cooled by the air conditioning indoor unit 13, and the cooling air is A cooling operation to be supplied to the ceiling chamber 12 as the conditioned air SA1 can be executed.
Although illustration is omitted, the air conditioning indoor unit 13 includes a heat exchanger, a ventilation fan, and the like in which a heat medium such as cold / hot water and refrigerant is circulated and supplied from a heat source unit, an outdoor unit, and the like.

  The ceiling material 11 for air conditioning has a large number of holes through which the conditioned air SA1 can pass, and is easily heated or cooled by the conditioned air SA1, and is made of metal that can radiate or absorb heat to the indoor space A. It is comprised with the perforated panel (an example of a perforated ceiling material, an example of a radiation ceiling material).

  The ceiling-side air conditioning equipment 10 configured in this way heats or cools the air conditioning ceiling material 11 with the conditioned air SA1 supplied into the ceiling chamber 12, and passes through the heated or cooled air conditioning ceiling material 11. Thus, heat radiation or heat absorption can be performed on the entire indoor space A from the ceiling side. Further, the ceiling-side air conditioning equipment 10 can introduce the conditioned air SA1 supplied into the ceiling chamber 12 into the entire indoor space A through a number of holes formed in a distributed manner in the ceiling material 11 for air conditioning.

Next, description will be added for each operation performed by the ceiling-side air conditioning facility 10.
(Heating operation)
When the heating operation is commanded from the control device 30, the ceiling-side air conditioning facility 10 heats the return air RA1 from the indoor space A by the air conditioning indoor unit 13, and uses the heated air as the conditioned air SA1 in the ceiling chamber 12 The heating operation to supply to is executed.
Then, the air conditioning ceiling material 11 is heated by the conditioned air SA1 (heated air) supplied into the ceiling chamber 12, and the indoor space A from the ceiling side to the entire indoor space A through the heated air conditioning ceiling material 11. Heat radiation. In addition, conditioned air SA1 (heated air) is introduced from the ceiling chamber 12 to the entire indoor space A through a large number of holes formed in the air conditioning ceiling material 11 in a distributed manner.
In this way, the ceiling-side air conditioning facility 10 can efficiently heat the entire indoor space A from the ceiling side.

(Cooling operation)
When the cooling operation is commanded from the control device 30, the ceiling-side air conditioning facility 10 cools the return air RA1 from the indoor space A by the air conditioning indoor unit 13, and uses the cooling air as the conditioned air SA1 in the ceiling chamber 12 The cooling operation to be supplied to is executed.
Then, the air-conditioning ceiling material 11 is cooled by the conditioned air SA1 (cooling air) supplied into the ceiling chamber 12, and the indoor space A is generally directed from the ceiling side through the cooled air-conditioning ceiling material 11. Heat absorption. In addition, conditioned air SA1 (cooling air) is introduced from the ceiling chamber 12 to the entire interior space A through a large number of holes formed in the ceiling material 11 for air conditioning.
In this way, the ceiling-side air conditioning facility 10 can efficiently cool the entire indoor space A from the ceiling side. In particular, the conditioned air SA1 (cooling air) introduced into the indoor space A from the ceiling side naturally descends to the lower layer side of the indoor space A due to the difference in gravity, so that the cooling of the indoor space A is more efficient. Become.

<Floor perimeter air conditioning equipment>
As shown in FIGS. 1 (a) and 1 (b), the floor-side perimeter air-conditioning equipment 20 is capable of blowing air from the floor side to the perimeter zone P as conditioned air SA2 after sucking the return air RA2 from the perimeter zone P and adjusting the temperature. It is configured.

Specifically, the floor side perimeter air conditioning equipment 20 is disposed above the slab S1 on the lower floor side in a state where the air inlet 21 and the air outlet 22 provided on the upper surface face the perimeter zone P. It is arranged in the underfloor space between the floor material Y and the like. Then, the floor side perimeter air conditioning equipment 20 sucks the return air RA2 downward from the perimeter zone P through the air inlet 21 and heats or cools it, and uses the heated or cooled air as conditioned air SA2 through the air outlet 22 on the floor side. To the perimeter zone P so that air can be blown upward.
In this embodiment, the air inlet 21 and the air outlet 22 are provided in an arrangement state in which the air inlet 21 is located on the outdoor side of the air outlet 22.

  The floor-side perimeter air conditioning equipment 20 heats the return air RA2 and returns the heated air as air-conditioned air SA2 to the perimeter zone P at the air blowing speed V1 and the dew condensation prevention operation conditions in which no condensation occurs. When the air RA2 is cooled and the cooling air is supplied to the perimeter zone P as the conditioned air SA2 at a blowing speed V2, the condensation water is heated and evaporated when the condensation water is generated in the condensation prevention cooling operation. The condensed water evaporation operation to be performed can be executed.

Here, the blowing speed V2 in the condensation prevention cooling operation is set to be larger than the blowing speed V1 in the heating operation. That is, in the heating operation, the perimeter zone P can be efficiently heated in a form in which the heated air is raised relatively slowly from the floor side using the difference in gravity. On the other hand, in the condensation prevention cooling operation, it is possible to appropriately cool the perimeter zone P in a form in which the air blowing speed is made larger than in the heating operation and the air arrival distance from the floor side to the upper layer side is extended against the gravity difference. it can.
In addition, by increasing the air blowing speed in the condensation prevention cooling operation in this way, the operation condition of the condensation prevention cooling operation can be further set as a safety condition for preventing the generation of condensation water. The generation of condensed water during operation can be prevented more reliably.

  As shown in FIG. 1B, the floor side perimeter air conditioning equipment 20 includes, for example, a main body casing 23 having an air inlet 21 and an air outlet 22 on the upper surface, a ventilation fan 24, a heat source unit, an outdoor unit, and the like. A heat exchanger 25 to which a heat medium such as cold / hot water and a refrigerant is circulated, an electric heater 26, a drain pan 27, a control unit (not shown), various sensors (not shown), and the like are built in. In this embodiment, the ventilation fan 24, the heat exchanger 25, and the electric heater 26 are sequentially arranged from the upstream side of the air passage in the main body casing 23.

The floor-side perimeter air conditioning equipment 20 heats the return air RA2 by exchanging heat with the heat medium in the heat exchanger 25 in the heating operation, and heat-exchanges the return air RA2 under the dew condensation prevention operation condition in the dew condensation prevention cooling operation. The container 25 is cooled by exchanging heat with the heat medium.
Since this floor-side perimeter air conditioning equipment 20 is prevented from generating condensed water during cooling, drain water discharge equipment such as a drain discharge pipe for the floor-side perimeter air conditioning equipment 20 is omitted.

  The drain pan 27 is provided in order to avoid the inconvenience that the condensed water leaks from the main body casing 23 to the underfloor space or the like in the unlikely event that condensed water is generated in the condensation prevention cooling operation. The drain pan 27 is arranged immediately below the heat exchanger 25 and is configured to receive dew condensation water generated in the heat exchanger 25.

The electric heater 26 is provided as condensed water evaporation means 28 for heating and evaporating the condensed water generated in the condensation prevention cooling operation. The electric heater 26 is arranged at a position close to the drain pan 27 and is configured to heat and evaporate the condensed water received by the drain pan 27.
In the present embodiment, the electric heater 26 is disposed immediately above the drain pan 27 and in the air passage in the main body casing 23. Therefore, the condensed water received on the upper surface side of the drain pan 27 can be directly heated by the electric heater 26. In addition, the air can be additionally heated by the electric heater 26 when the heating load is large, such as when the heating operation starts.

  The drain pan 27 is in an inclined posture in which the electric heater 26 side is positioned below the opposite side, and the condensed water received by the drain pan 27 is guided to flow down to the electric heater 26 side. Therefore, the condensed water received by the drain pan 27 can be efficiently heated and evaporated by the electric heater 26.

Next, a description will be given of each operation performed by the floor-side perimeter air conditioning equipment 20.
(Heating operation)
When the heating operation is commanded from the control device 30, the floor-side perimeter air conditioning equipment 20 sucks the return air RA2 downward from the perimeter zone P through the air suction port 21 and heats it, and the heated air is used as conditioned air SA2. A heating operation is performed in which air is blown upward from the floor side to the perimeter zone P through the air outlet 22. In this heating operation, when the heating load at the time of rising or the like is large, the electric heater 26 is operated and the return air RA2 is additionally heated by the electric heater 26.

By performing this heating operation, the perimeter zone P can be heated from the floor side to improve the thermal environment of the perimeter zone P.
Further, in the present embodiment, the air inlet 21 is located on the outdoor side of the perimeter zone P, and the air outlet 22 is located on the indoor side of the perimeter zone P. The coldest outdoor air can be sucked and heated, and the heated air can be blown out to the indoor side of the perimeter zone P as conditioned air SA2, and the thermal environment of the perimeter zone P can be improved efficiently.

(Condensation prevention cooling operation)
The floor-side perimeter air conditioning equipment 20 sucks the return air RA2 downward from the perimeter zone P through the air inlet 21 under the dew condensation prevention operation condition in which dew condensation does not occur when the controller 30 instructs the dew condensation prevention cooling operation. Condensation prevention cooling operation in which the cooled air is blown upward from the floor side to the perimeter zone P through the air outlet 22 as the conditioned air SA2 is executed.

  Here, the dew condensation prevention operation condition is an operation condition in which the temperature of the conditioned air SA2 does not drop to the dew point temperature. For example, an operation condition in which the target temperature of the conditioned air SA2 exceeds the dew point temperature of the conditioned air SA2 is applicable. . In the present embodiment, the target temperature of the conditioned air SA2 is set to a temperature as close as possible to the dew point temperature on the side exceeding the dew point temperature of the conditioned air SA2.

  The dew point temperature of the conditioned air SA2 is measured by a dew point temperature measuring device or the like (not shown) that measures the dew point temperature of the indoor space A (specifically, the perimeter zone P) and is input to the control device 30. Has been. The control device 30 sets the target temperature of the conditioned air SA2 based on the dew point temperature input from a dew point temperature measuring instrument or the like.

Then, based on the set target temperature, the temperature of the cold water flowing through the heat exchanger 25 in the floor-side perimeter air conditioning equipment 20, the pressure of the refrigerant, and the ventilation fan 24 so that the temperature of the conditioned air SA2 becomes the target temperature. The amount of air blown is adjusted.
In addition, although the dew point temperature measuring device can use what directly measures dew point temperature, you may utilize what calculates dew point temperature from the measurement result of a thermohygrometer.

That is, the floor-side perimeter air conditioning equipment 20 cools the return air RA2 under the above-described dew condensation prevention operation condition, and blows out the low-temperature cooling air that does not reach the dew point temperature to the perimeter zone P as the conditioned air SA2, thereby causing dew condensation water. It is possible to improve the thermal environment of the perimeter zone P by performing low-level or medium-level cooling in a state where the occurrence of the above is prevented.
Furthermore, in this embodiment, since the air inlet 21 is located on the outdoor side of the perimeter zone P and the air outlet 22 is located on the indoor side of the perimeter zone P, in the dew condensation prevention cooling operation in summer, the perimeter zone P The indoor air on the hottest outdoor side can be sucked and cooled, and the cooled air can be blown out to the indoor side of the perimeter zone P as conditioned air SA2, so that the thermal environment of the perimeter zone P can be improved efficiently.
Moreover, in this condensation prevention cooling operation, the indoor air on the outdoor side (window side), which is the hottest, is used as the air to be cooled, so that it is easy to ensure a relatively large difference from the dew point temperature. It is possible to more reliably prevent the generation of condensed water by cooling to the following.

(Condensate water evaporation operation)
When the floor-side perimeter air conditioning equipment 20 determines that a predetermined condensed water generation condition indicating the generation of condensed water is satisfied from the measurement results of various built-in sensors and the like, the electric heater 26 as the condensed water evaporation means 28 is predetermined. Condensate water evaporation operation that operates at the output of.
Here, the condensed water generation condition is measured, for example, when the temperature and humidity of the return air RA2 measured by various sensors incorporated in the floor-side perimeter air conditioning equipment 20 is out of the set range or by various sensors. It can be set when the water level of the drain pan exceeds the set range.
By performing this dew condensation water evaporation operation, the dew condensation water received on the upper surface side of the drain pan 27 can be directly heated by the electric heater 26, and the dew condensation water can be efficiently evaporated.

<Air conditioning system operation mode>
Next, each operation mode of the air conditioning system will be described with reference to FIGS. In addition, the control apparatus 30 can select each operation mode based on temperature / humidity information of indoor air or outside air input from a user's remote control operation or various sensors.

(Heating / Heating mode)
When the control device 30 selects the “heating / heating mode”, a heating operation is commanded to the ceiling-side air conditioning equipment 10 and the floor-side perimeter air-conditioning equipment 20.

Then, the ceiling-side air conditioning facility 10 performs the heating operation described above, and radiates heat from the ceiling side to the entire indoor space A through the heated air-conditioning ceiling material 11, and the air-conditioning ceiling material 11 The conditioned air SA1 (heated air) is introduced into the indoor space A from the ceiling chamber 12 through a large number of dispersed holes, and the entire indoor space A is heated.
The floor-side perimeter air conditioning equipment 20 performs the heating operation described above, sucks the return air RA2 downward from the perimeter zone P through the air inlet 21 and heats it, and uses the heated air as conditioned air SA2. The air is sent upward from the floor side to the perimeter zone P through 22 and heating is added to the perimeter zone P.

  In this way, in the “heating / heating mode”, heating by the floor-side perimeter air conditioning equipment 20 is added to the perimeter zone P while heating the entire indoor space A by the ceiling-side air conditioning equipment 10. Thereby, the heating load of the indoor space A including the perimeter zone P can be covered appropriately.

(Cooling / Heating mode)
When the control device 30 selects the “cooling / heating mode”, the cooling operation is commanded to the ceiling side air conditioning equipment 10 and the heating operation is commanded to the floor side perimeter air conditioning equipment 20.

Then, the ceiling-side air conditioning facility 10 performs the above-described cooling operation and absorbs heat from the ceiling side to the entire indoor space A through the cooled air-conditioning ceiling material 11, and The conditioned air SA1 (cooling air) is introduced from the ceiling chamber 12 to the entire indoor space A through the numerous holes formed in a distributed manner, and the entire indoor space A is cooled.
The floor-side perimeter air conditioning equipment 20 performs the heating operation described above, sucks the return air RA2 downward from the perimeter zone P through the air inlet 21 and heats it, and uses the heated air as conditioned air SA2. The air is sent upward from the floor to the perimeter zone P through 22 to heat the perimeter zone P.

  Thus, in the “cooling / heating mode”, the ceiling-side air conditioning facility 10 cools the entire indoor space A, while the perimeter zone P is heated by the floor-side perimeter air-conditioning equipment 20. Thus, different types of loads (heating load and cooling load) in the indoor space A can be appropriately covered.

(Cooling / Cooling mode)
When the control device 30 selects the “cooling / cooling mode”, the cooling operation is commanded to the ceiling side air conditioning equipment 10, and the dew condensation prevention cooling operation is commanded to the floor side perimeter air conditioning equipment 20.

Then, the ceiling-side air conditioning facility 10 performs the above-described cooling operation and absorbs heat from the ceiling side to the entire indoor space A through the cooled air-conditioning ceiling material 11, and The conditioned air SA1 (cooling air) is introduced from the ceiling chamber 12 to the entire indoor space A through the numerous holes formed in a distributed manner, and the entire indoor space A is cooled.
The floor-side perimeter air conditioning equipment 20 performs the above-described dew condensation prevention cooling operation, and cools by sucking the return air RA2 downward from the perimeter zone P through the air inlet 21 under the dew condensation prevention operation condition in which no condensation occurs. Then, the cooled air is blown upward from the floor side to the perimeter zone P through the air outlet 22 as the conditioned air SA2, and cooling at a low level or an intermediate level is performed in a state where the generation of condensed water is prevented.

Thus, in the “cooling / cooling mode”, the ceiling-side air conditioning equipment 10 cools the entire indoor space A, while the perimeter zone P is weak or moderate by the floor-side perimeter air-conditioning equipment 20. By adding a level of cooling, the cooling load of the indoor space A including the perimeter zone P can be properly covered.
In addition, in the “cooling / cooling mode”, when a predetermined dew condensation water generation condition indicating the generation of dew condensation water is established on the floor side perimeter air conditioner 20 side, the floor side perimeter air conditioner 20 Since the evaporation operation is performed and the condensed water is evaporated, it is possible to surely prevent the disadvantage that the condensed water leaks into the under-floor space.

[Another embodiment]
(1) In the above-described embodiment, the dew condensation water generated by the dew condensation prevention cooling operation of the floor side perimeter air conditioning equipment 20 can be heated and evaporated as the dew condensation water evaporation means 28, and air is added during the heating operation. Although the case where the floor-side perimeter air conditioning equipment 20 is provided with the heatable electric heater 26 is shown as an example, the dew condensation water evaporation means 28 has various configurations capable of evaporating the dew condensation water generated in the dew condensation prevention cooling operation. Can be adopted as appropriate.

  For example, the condensed water evaporation means 28 increases the amount of return air RA2 (room air) sucked from the air suction port 21 in the floor-side perimeter air conditioning equipment 20, and condensation is formed on the increased return air RA2 (room air). You may be comprised so that water may be exposed and condensed water may be evaporated.

  In that case, as shown in FIG. 3, in the floor-side perimeter air conditioning equipment 20, the drain pan 27 is arranged at a position and posture in which the upper surface portion is located in the air passage in the main body casing 23. When it is determined that the predetermined dew condensation water generation condition is satisfied, the dew condensation water evaporation operation for increasing the amount of return air RA2 (room air) sucked from the air suction port 21 to the floor perimeter air conditioning equipment 20 is executed. Configure as follows.

  In the illustrated example, the drain pan 27 is displaced to the side of the ventilation fan 24 that covers the space between the ventilation fan 24 and the heat exchanger 25 from below, and the ventilation fan 24 side is more than the opposite side. Located on the lower side, the upper surface of the drain pan 27 is inclined to face the ventilation fan 24 side.

In this way, the amount of the return air RA2 (room air) sucked from the air suction port 21 in the floor-side perimeter air conditioning equipment 20 is increased by the execution of the condensed water evaporation operation, and the increased return air RA2 ( The condensed water can be evaporated by exposing the condensed water to room air).
In this case, the dew condensation water evaporation means 28 includes a control unit (not shown) of the floor side perimeter air conditioning equipment 20, a ventilation fan 24, a drain pan 27, and the like.

  (2) In the above-described embodiment, in the floor side perimeter air conditioning equipment 20, the air inlet 21 and the air outlet 22 are provided in an arrangement state in which the air inlet 21 is located on the outdoor side of the air outlet 22. However, the air inlet 21 may be provided in an arrangement state that is located on the indoor side of the air outlet 22.

  (3) In the above-mentioned embodiment, in the floor side perimeter air-conditioning equipment 20, the case where the ventilation speed V2 in the dew condensation prevention cooling operation was set larger than the ventilation speed V1 in the heating operation was shown as an example. In addition to this, an opening area adjusting mechanism capable of adjusting the opening area of the air outlet 22 of the floor-side perimeter air conditioning equipment 20 is provided. In the floor-side perimeter air-conditioning equipment 20, the opening area of the air outlet 22 in the dew condensation prevention cooling operation is provided. May be set smaller than the opening area of the air outlet 22 in the heating operation, and the air blowing speed V2 in the condensation prevention cooling operation may be further increased.

  (4) In the above-described embodiment, when the cooling and heating are performed by the ceiling side air conditioning equipment 10 and the floor side perimeter air conditioning equipment 20 as in the case of executing the “cooling / heating mode”, the ceiling side air conditioning The heat exchanger (not shown) of the facility 10 and the heat exchanger 25 of the floor side perimeter air conditioning facility 20 are connected by a heat medium circulation path, and the heat exchanger (not shown) of the ceiling side air conditioning facility 10 and the floor side perimeter are connected. A heat medium may be circulated and supplied to the heat exchanger 25 of the air conditioning facility 20.

  (5) In the above-described embodiment, as the ceiling-side air conditioning equipment 10, the conditioned air SA1 is blown from the ceiling side to the indoor space A via the perforated ceiling material (air-conditioning ceiling material 11), and the radiant ceiling material (air-conditioning) In the above description, the facility that radiates or absorbs heat from the ceiling side to the indoor space A via the ceiling material 11) is shown as an example. However, as the ceiling side air conditioning facility 10, the interior from the ceiling side through the perforated ceiling material A facility that simply blows the conditioned air SA1 into the space A or a facility that only radiates or absorbs heat from the ceiling side to the indoor space A via a radiant ceiling material may be used.

DESCRIPTION OF SYMBOLS 10 Ceiling side air conditioning equipment 11 Air conditioning ceiling material 20 Floor side perimeter air conditioning equipment 21 Air inlet 22 Air outlet 26 Electric heater 28 Condensate water evaporation means A Indoor space P Perimeter zone V1 Blowing speed V2 Blowing speed

Claims (6)

A ceiling-side air conditioning facility that blows conditioned air from the ceiling side to the indoor space via the perforated ceiling material, or that radiates or absorbs heat from the ceiling side to the indoor space via the radiation ceiling material, and
The perimeter zone of the indoor space is equipped with a floor side perimeter air conditioning equipment that blows conditioned air from the floor side,
The floor-side perimeter air conditioning equipment can perform heating operation that heats air and blows air to the perimeter zone, and anti-condensation cooling operation that cools air and blows air to the perimeter zone under the dew condensation prevention operation conditions where condensation does not occur The air conditioning system that is configured in.   2. The air conditioning system according to claim 1, wherein in the floor-side perimeter air conditioning equipment, an air blowing speed in the dew condensation prevention cooling operation is set larger than an air blowing speed in the heating operation. The floor-side perimeter air conditioning equipment is configured to inhale indoor air from an air inlet and regulate the temperature to blow out as conditioned air from an air outlet.
The air conditioning system according to claim 1 or 2, wherein the air inlet and the air outlet are provided in an arrangement state in which the air inlet is located on an outdoor side of the air outlet.   The air conditioning system according to any one of claims 1 to 3, further comprising condensed water evaporation means capable of evaporating condensed water generated in the condensation prevention cooling operation.   In the floor side perimeter air conditioning equipment, an electric heater capable of heating and evaporating the condensed water generated in the dew condensation prevention cooling operation and additionally heating air in the heating operation serves as the dew condensation water evaporating means. The air conditioning system of Claim 4 provided. The floor-side perimeter air conditioning equipment is configured to inhale indoor air from an air inlet and regulate the temperature to blow out as conditioned air from an air outlet.
The said dew condensation water evaporation means is comprised so that the amount of the indoor air suck | inhaled from the said air inlet may be increased, and dew condensation water may be exposed to the increased indoor air, and a dew condensation water may be evaporated. Air conditioning system.

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