KR20090125312A - HVAC system - Google Patents

Abstract

It can supply cold and warm air, cold water and hot water, and has an auxiliary heat exchanger that promotes the vaporization of low-temperature low-pressure gas refrigerant flowing into the compressor, so that air-conditioning and cold / hot water can be used properly according to the change of the season. An air conditioning hot and cold water system capable of efficient operation is disclosed. Cooling and cooling hot and cold water system according to the present invention comprises a conventional refrigeration cycle unit compressor, condenser, expansion valve and evaporator constitute a closed circuit; An auxiliary heat exchanger which sucks room temperature air and provides latent heat of evaporation to the low-temperature low-pressure liquid refrigerant introduced to the evaporator; Cold air and cold water supply unit for providing cold air and cold water that can be cooled by the heat exchange is performed by the auxiliary heat exchange unit; And a warm air and hot water supply unit configured to provide hot air and hot water capable of heating by heat exchange by a condenser.

Description

HVAC & HOT WATER SYSTEM {HEATING AND COOLING SYSTEM}

The present invention relates to an air-conditioning cold / hot water system provided in a house or an agricultural house, and more particularly, can supply cold air and hot air, cold water and hot water, and an auxiliary heat exchanger for promoting vaporization of a low-temperature low-pressure gas refrigerant flowing into a compressor. The present invention relates to an air conditioning hot and cold water system capable of using air conditioning and cold and hot water appropriately according to the change of the season, and enabling efficient operation of the system.

In general, air-conditioning systems use compressors, condensers, expansion valves, and evaporators as basic components, and use latent heat that is transferred when refrigerant circulating them is converted from liquid to gas and gas to liquid.

1 is a schematic view showing a conventional air conditioning cold and hot water system.

As shown in FIG. 1, the cooling and heating system 10 selectively opens and closes a compressor 12 compressed and forcedly circulated at high temperature and high pressure, and a refrigerant compressed by the compressor 12 is sent to the indoor heat exchanger 16. The four-way valve 14 and the high-temperature, high-pressure refrigerant flowing through the four-way valve 14, the indoor heat exchanger 16 for exchanging heat with the indoor air, and the condenser in the room heat exchanger (16) 18, an expansion valve 20 for adiabatic expansion of the refrigerant carried through the expansion valve, an outdoor heat exchanger 22 for exchanging heat of a low temperature low pressure refrigerant through the expansion valve 20 with outdoor air, and the outdoor heat exchanger ( 22 is a liquid separator 24 which separates the liquid refrigerant from the refrigerant flowing through the four-way valve 14 and is supplied to the compressor 12.

In the above-described conventional air-conditioning system 10, the refrigerant compressed and discharged at high temperature and high pressure is discharged to indoor air from the indoor heat exchanger 16 through the four-way valve 14 and condensed into a high-pressure supercooling liquid at the same time. The refrigerant condensed with the high-pressure subcooled liquid is adiabaticly expanded into the low-temperature low-pressure refrigerant by the expansion valve 20 through the receiver 18, and expands into the low-temperature low-pressure refrigerant. After the heat exchanger 22 absorbs heat from the outdoor air and evaporates it, it becomes a low temperature gas, and the low temperature gas refrigerant flows into the liquid separator 24 to separate the liquid refrigerant and gas refrigerant generated on the pipe, and then the gas refrigerant. Only the compressor 12 is repeated to be compressed and discharged at high temperature and high pressure again to repeat the cycle.

However, in the above-described air conditioning system 10, when the outdoor temperature is relatively low, water vapor generated by condensation due to contact between the low-temperature low-pressure refrigerant and the cold outdoor air freezes to prevent evaporative latent heat absorption of the low-temperature low-pressure liquid refrigerant. As a result, the liquid refrigerant is not completely vaporized in the outdoor heat exchanger 16, and there is a problem in that the compression performance of the compressor 12 is lowered.

In addition, the conventional air conditioning system 10 has another problem in that cold water and hot water cannot be used.

The present invention has been made to solve the conventional problems as described above, an object of the present invention is to supply cold air and hot air and cold water and hot water, secondary heat exchange to promote the vaporization of low-temperature low-pressure gas refrigerant flowing into the compressor side By providing a wealth, it is possible to provide air-conditioning and cold / hot water systems capable of efficiently operating the system as well as using air-conditioning and cold / hot water according to the change of the season.

In order to achieve the object of the present invention as described above, the present invention,

A conventional refrigeration cycle unit in which a compressor, a condenser, an expansion valve, and an evaporator constitute a closed circuit;

An auxiliary heat exchanger which sucks room temperature air and provides latent heat of evaporation to the low-temperature low-pressure liquid refrigerant introduced to the evaporator;

Cold air and cold water supply unit for providing cold air and cold water that can be cooled by the heat exchange is performed by the auxiliary heat exchange unit; And

It provides a heating and cooling cold and hot water system consisting of; a hot air and hot water supply unit for providing a hot air and hot water to heat the heat exchange by the condenser.

As described above, according to the present invention, by providing an auxiliary heat exchanger for providing latent heat of evaporation to the low-temperature low-pressure liquid refrigerant flowing through the evaporator, there is an advantage that can maximize the efficiency of the air-conditioning cold and hot water system according to the present invention.

In addition, by providing the latent heat of evaporation to the evaporator, the cold air and cold water supply unit is arranged in the anti-freeze storage tank of the secondary heat exchanger cold exchanged by the evaporator, and the hot air and hot water supply unit to the condenser to provide cooling and hot water to the user There is this.

Hereinafter, with reference to the accompanying drawings will be described for the air conditioning hot and cold water system according to an embodiment of the present invention.

Figure 2 is a schematic diagram showing a cooling and heating cold and hot water system according to the present invention.

Referring to FIG. 2, the cooling / cooling / hot / hot water system 100 according to the present invention includes a conventional refrigeration cycle unit 110 in which a compressor 112, a condenser 114, an expansion valve 116, and an evaporator 118 form a closed circuit. And a subsidiary heat exchanger (130) and a subsidiary heat exchanger (130) which are heat-exchanged by the evaporator 118 at the same time as providing a low-temperature low-pressure liquid refrigerant introduced to the evaporator 118 by sucking the room temperature air Cold air and cold water supply unit 140 for providing cold air and cold water that can be cooled by the heat exchange by the heat exchange, and hot air and hot water to provide hot air and hot water that can be heated by heat exchange by the condenser 114 It consists of a supply unit (160).

First, the refrigeration cycle unit 110, as anyone can see, the compressor 112 to compress the refrigerant to high temperature and high pressure forcibly circulated, and to release the heat of the high temperature and high pressure gas refrigerant flowing from the compressor 112 to the high temperature and high pressure A condenser 114 for condensing the gas refrigerant, an expansion valve 116 for adiabatic expansion and expansion of the high temperature and high pressure liquid refrigerant with a low temperature low pressure liquid refrigerant, and a low temperature low pressure liquid refrigerant to absorb the latent heat of evaporation into a low temperature low pressure gas refrigerant. Evaporator 118 is evaporated, the oil separator 120 is disposed between the compressor 112 and the condenser 114, the gas-liquid separator 122 and the receiver between the condenser 114 and the expansion valve 116 124 is disposed, and a liquid separator 126 is disposed between the evaporator 118 and the compressor 112.

An auxiliary heat exchanger 130 and a cold air and cold water supply unit 140 connected to the auxiliary heat exchanger 130 are disposed on the evaporator 118 side of the refrigeration cycle unit 110 formed as described above, and on the condenser 114 side. Warm air and hot water supply unit 160 is disposed.

The auxiliary heat exchanger 130 includes an antifreeze storage tank 132 in which an antifreeze fluid is transferred to the refrigerant at low temperature and low pressure passing through the evaporator 118, and an antifreeze disposed in the outdoor and introduced from the antifreeze storage tank 132 at room temperature. Auxiliary heat exchanger 134 for contacting and exchanging heat with air, one end is connected to the antifreeze reservoir 132 and the other end is connected to the antifreeze reservoir 132 again through the auxiliary heat exchanger 134 and evaporator 118 It consists of an antifreeze circulation tube 136 equipped with an antifreeze circulation motor 138. The antifreeze reservoir 132 is stored in the cold antifreeze heat exchanged through the evaporator 118, the auxiliary heat exchanger 134 heat exchanges the cold antifreeze introduced from the antifreeze reservoir 132 in contact with the outdoor air at room temperature The warm, heat exchanged antifreeze flows into the evaporator 118 so that the low temperature low pressure in the evaporator 118 provides the latent heat of evaporation to the liquid refrigerant. The antifreeze that has passed through the evaporator 118 is heat exchanged by the evaporator 118, and the antifreeze that has cooled is introduced into the antifreeze reservoir 132.

The cold air and cold water supply unit 140 is disposed adjacent to the cold water storage tank 142, the cold water storage tank 142, and a cold air blowing fan 144 for blowing cold air, and at one end room temperature is introduced into the water and the other end is an antifreeze storage tank ( Cold water pipe 146 connected to the cold water storage tank 142 through the 132, and one end is connected to the cold water storage tank 142 and the other end is circulated to the cold water storage tank 142 by circulating the space to be cooled again A tube 148. The cold water circulation tube 148 is equipped with a cold water circulation motor 150. Water at room temperature introduced from one end of the cold water pipe 146 is heat exchanged through the antifreeze storage tank 132 in which the cold antifreeze is stored, and the cold cold water is stored in the cold water storage tank 142. When cooling is performed in a space to be cooled, the cooling air blowing fan 144 and the cooling circulation motor 150 are operated to cool. Preferably, the cold water supply tank 142 is further connected to the cold water supply pipe 152 to provide the user with cold water of the cold water storage tank 142.

On the other hand, the hot air and hot water supply unit 160 is disposed adjacent to the hot water storage tank 162, the hot water storage tank 162 and the hot air blowing fan 164 for blowing the warm air, and once the room temperature is introduced into the water and the other end of the condenser Hot water pipe 166 connected to the hot water storage tank 162 via the 114, and one end is connected to the hot water storage tank 162 and the other end circulates the space to be heated to the hot water storage tank 162 again The circulation pipe 168 is provided. The hot water circulation tube 168 is equipped with a hot water circulation motor 170. Water at room temperature introduced from one end of the hot water pipe 166 is heat exchanged through the condenser 114, and the warmed hot water is stored in the hot water storage tank 162. And when you want to heat in the space to be heated is heated by operating the hot water blowing fan 164 and the hot water circulation motor 170. Preferably, the hot water storage tank 162 is further connected to the hot water supply pipe 172 to provide the user with hot water of the hot water storage tank 162.

The following briefly describes the operating state of the air conditioning hot and cold water system 100 formed as described above.

The high temperature and high pressure gas refrigerant discharged from the compressor 112 flows into the condenser 114, and the refrigerant introduced into the condenser 114 condenses into a high temperature liquid while flowing through the condenser 114, and condensed high temperature liquid refrigerant. Is introduced into the expansion valve 116, and is adiabatic expansion and subcooled while passing through the expansion valve 116. The supercooled liquid refrigerant flows into the evaporator 118, absorbs heat, and becomes a low temperature low pressure gas. At this time, the cold antifreeze stored in the antifreeze storage tank 132 of the subsidiary heat exchanger 130 is heat-exchanged while passing through the subsidiary heat exchanger 134, and the antifreeze thus exchanged is introduced into the evaporator 118 side and the evaporator 118 Provide latent heat of evaporation to the liquid refrigerant entering the furnace. The latent heat of evaporation allows the refrigerant flowing into the evaporator 118 to be completely vaporized. The gas refrigerant vaporized in the evaporator 118 is introduced into the compressor 112 to complete one cycle.

In order to cool in summer under the condition that the air-conditioning cold and hot water system 100 according to the present invention. By operating the cold air blowing fan 114 or the cold water circulation motor 150 to cool the space to be cooled. At this time, the hot air blowing fan 164 and the hot water circulation motor 170 to stop the operation. In addition, in order to perform the heating in winter, under the state in which the operation of the cold air blowing fan 114 and the cold water circulation motor 150 is stopped, the hot air blowing fan 164 and the hot water circulation motor 170 operate a space to be heated. Heating. On the other hand, in the early spring and late autumn when the day crossing is severe, the cold air and cold water supply unit 140 and the hot air and hot water supply unit 160 are operated alternately to perform the cooling and heating.

Meanwhile, the room temperature water introduced through the cold water pipe 146 and the hot water pipe 166 is heat exchanged with cold water and hot water through the antifreeze storage tank 132 and the condenser 114, and then the cold water storage tank 142 and the hot water storage tank. Stored in 162, the stored cold water and hot water is provided according to the user's purpose through the cold water supply pipe 152 and hot water supply pipe 172.

Although the above has been described with reference to a preferred embodiment of the present invention, those skilled in the art can variously modify and change the present invention without departing from the spirit and scope of the invention described in the claims. You will understand.

1 is a schematic view showing a conventional air conditioning hot and cold water system, and

Figure 2 is a schematic diagram showing a cooling and heating cold and hot water system according to the present invention.

Explanation of symbols on the main parts of the drawing

100: cooling and heating cold and hot water system 110: refrigeration cycle

112: compressor 114: condenser

116: expansion valve 118: evaporator

130: auxiliary heat exchanger 132: antifreeze reservoir

134: auxiliary heat exchanger 136: antifreeze circulation tube

140: cold air and cold water supply unit 142: cold water storage tank

144: cold air blowing fan 146: cold water pipe

148: cold water circulation pipe 160: hot air and hot water supply unit

162: hot water storage tank 164: warm wind fan

166: hot water pipe 168: hot water circulation pipe

Claims (4)

A conventional refrigeration cycle unit in which a compressor, a condenser, an expansion valve, and an evaporator constitute a closed circuit; An auxiliary heat exchanger that sucks room temperature air and provides latent heat of evaporation to the low-temperature low-pressure liquid refrigerant introduced to the evaporator; A cold air and cold water supply unit configured to provide cold air and cold water capable of cooling by heat exchange by the auxiliary heat exchange unit; And Heating and cooling hot and cold water system, characterized in that consisting of; hot air and hot water supply unit for providing a hot air and hot water to the heat exchange is made by the condenser. The method of claim 1, wherein the auxiliary heat exchange unit, An antifreeze reservoir configured to store cold antifreeze heat exchanged while passing through the evaporator; An auxiliary heat exchanger disposed outside and providing latent heat of evaporation to the refrigerant flowing through the evaporator through heat exchange by contacting cold antifreeze flowing from the antifreeze storage tank with external air at room temperature; An antifreeze circulation motor is mounted, and one end is connected to the antifreeze reservoir and the other end is an antifreeze circulation tube connected to the antifreeze reservoir again through the auxiliary heat exchanger and the evaporator. The method of claim 2, wherein the cold air and cold water supply unit, A cold air blowing fan disposed adjacent to the cold water storage tank and the cold water storage tank to blow cold air; Cold water pipe is connected to the cold water storage tank through the antifreeze storage tank and the other end is the room temperature is introduced into the first end; Cold water circulation motor is mounted, one end is connected to the cold water storage tank and the other end is circulated to the cooling space to the cold water circulation pipe connected to the cold water storage tank; And Cooling and heating cold and hot water system, characterized in that consisting of; cold water supply pipe for providing a user with cold water of the cold water storage tank. According to claim 1, wherein the warm air and hot water supply unit, A hot air blowing fan disposed adjacent to the hot water storage tank and the hot water storage tank to blow warm air; At one end, water is introduced into the room temperature, and the other end is connected to the hot water storage tank via the condenser; A hot water circulation motor is mounted, one end of which is connected to the hot water storage tank, and the other end of the hot water circulation tube that circulates a space to be heated and is connected to the hot water storage tank again; And Cooling and heating cold and hot water system, characterized in that consisting of; hot water supply pipe for providing a user with cold water of the hot water storage tank.

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