KR20040090129A - Multi-air conditioner capable of heating and cooling simultaneously for building - Google Patents

Abstract

PURPOSE: A simultaneous cooling and heating multi-air conditioner for a building is provided to realize partial operation of operating some indoor units, and realize simultaneous cooling and heating operation of indoor units. CONSTITUTION: A plurality of indoor units(11) are arranged in the room, having indoor heat exchangers(12). An outdoor unit(21) includes compressors(23). Outdoor heat exchangers(27) are arranged to selectively exchange heat with a low-temperature fluid having a temperature lower than a refrigerant to be condensed inside, or a high-temperature fluid having a temperature higher than a refrigerant to be evaporated inside. A distributor(41) is installed to appropriately supply the refrigerant according to states of cooling operation and heating operation of each indoor unit.

Description

MULTI-AIR CONDITIONER CAPABLE OF HEATING AND COOLING SIMULTANEOUSLY FOR BUILDING}

The present invention relates to a simultaneous air-conditioning-type multi air conditioner for a building, and more particularly, to simultaneously operate a partial operation in which only a part of indoor units are operated, and to simultaneously cool and heat a building. It's about a multi air conditioner.

1 is a view schematically showing a conventional cooling and heating system. As shown, a plurality of outlets 112 are formed in the indoor space of each floor of the building so that the treated air can be discharged during cooling or heating, and each outlet 112 is formed so that the treated air can flow. It is connected by the formed duct 111. In addition, the ventilation duct 114 is formed in each indoor space to circulate the air in the indoor space.

The duct 111 and the ventilation duct 114 usually extend to the basement floor of the building, and the air treatment part 121 for processing air is formed in the basement floor. One side of the air treatment unit 121 is connected to the inlet side of the duct 111, the other side is connected to the outlet side of the ventilation duct 114 in communication with each other. On one side of the ventilation duct 114, the outside air inlet 123 is formed so that the outside air can be introduced.

The evaporator 134 of the refrigerator 131 for cooling is disposed on the inlet side of the internal duct 111 of the air treatment unit 121, and the heat exchanger 143 for heating is disposed on the outlet side of the ventilation duct 114. have. The filter 144 and the humidifier 145 are respectively disposed upstream and downstream of the heat exchanger 143 with respect to the flow direction of air.

On the other hand, the refrigerator 131 includes a compressor 132 for compressing the refrigerant, a condenser 133 for condensing the compressed refrigerant through heat radiation, an evaporator 134 in which the refrigerant absorbs latent heat and evaporates the refrigerant, Is composed of an expansion device (not shown) which is expanded under reduced pressure. On the roof of the building, a cooling tower 136 is usually provided to promote heat dissipation of the condenser 133. A low temperature fluid cooled in the cooling tower 136 is provided between the cooling tower 136 and the condenser 133. The low temperature fluid circulation passage 130 is formed to circulate. The low temperature fluid circulation path 130 is provided with a low temperature fluid pump 138 to circulate cold water.

On one side of the heat exchanger 143, a boiler 141 is installed to supply a high temperature fluid to the heat exchanger 143, and a high temperature fluid circulation in which the high temperature fluid is circulated between the heat exchanger 143 and the boiler 141. The flow path 140 is formed. The high temperature fluid circulation path 140 is provided with a collecting tank 147 and a high temperature fluid pump 146, respectively.

By the way, in such a cooling and heating system of a conventional building, either the cooling operation or the heating operation is selectively selected, so that the cooling operation and the heating operation cannot be performed simultaneously, and only a part of each indoor space is cooled or heated. There is a problem that it is not economical because the entire building must be cooled or heated when cooling loads or heating loads of some indoor spaces are generated due to impossibility of partial operation (or partial operation).

Accordingly, an object of the present invention is to provide a simultaneous air-conditioning multi-air conditioner for a building capable of partially operating only part indoor units and cooling and heating a different indoor unit simultaneously.

1 is a view schematically showing a conventional cooling and heating system,

2 is a configuration of a refrigeration cycle of a building air-conditioning simultaneous multi air conditioner according to an embodiment of the present invention,

3 is a view showing a state of use of the air-conditioning simultaneous multi-air conditioner for buildings of FIG.

4 is a configuration of a refrigeration cycle of a building air-conditioning simultaneous multi air conditioner according to another embodiment of the present invention,

5 is a view showing a state of use of the air-conditioning simultaneous multi-air conditioner for the building of FIG.

Explanation of symbols on the main parts of the drawings

11: indoor unit 12: indoor heat exchanger

21: outdoor unit 23: compressor

27: air-cooled outdoor heat exchanger 35: high pressure engine

37: high pressure liquid pipe 41: distributor

51: outdoor heat exchanger 53: on-off valve

54: check valve 55: bypass flow

56: outdoor expansion device 61a: low temperature fluid circulation passage

62: cooling tower 63: low temperature fluid pump

65a: high temperature fluid circulation path 66: boiler

67: high temperature fluid pump 68: collecting tank

The object is, according to the present invention, a plurality of indoor units disposed indoors with an indoor heat exchanger; An outdoor unit having a compressor; An outdoor heat exchanger disposed to be selectively heat exchanged with any one of a low temperature fluid having a lower temperature than the refrigerant to be condensed therein and a high temperature fluid having a higher temperature than the refrigerant to be evaporated therein; It is achieved by a simultaneous air-conditioning type multi air conditioner for a building, characterized in that it comprises a distributor so that the refrigerant can be properly provided according to the cooling operation and heating operation state of each indoor unit.

Here, it is preferable to further include a cooling tower for providing a low-temperature fluid having a lower temperature than the refrigerant of the outdoor heat exchanger to condense the refrigerant of the outdoor heat exchanger.

The cooling tower and the outdoor heat exchanger further comprises a low temperature fluid circulation path formed to allow the low temperature fluid to circulate, and a low temperature fluid pump disposed in the low temperature fluid circulation path to allow the low temperature fluid to circulate along the low temperature fluid circulation path. It is effective to include.

It is preferable to further include a boiler for providing a high-temperature fluid having a higher temperature than the refrigerant of the outdoor heat exchanger so that the refrigerant of the outdoor heat exchanger can absorb the latent heat of evaporation.

The hot fluid circulation passage formed so that the hot fluid heated in the boiler circulates between the boiler and the outdoor heat exchanger and the hot fluid circulation passage are disposed so that the high temperature fluid is circulated along the hot fluid circulation passage. It is effective to further comprise a high temperature fluid pump.

It is preferable to further include a collecting tank disposed upstream of the high temperature fluid pump along the circulation direction of the high temperature fluid.

The outdoor heat exchanger is effectively formed integrally with the outdoor unit.

The outdoor unit preferably further includes an air-cooled outdoor heat exchanger formed to exchange heat with the refrigerant inside the air.

It is effective to further include a blowing fan for blowing the heat exchange of the air-cooled outdoor heat exchanger to promote.

Preferably, the outdoor heat exchanger and the air-cooled outdoor heat exchanger are disposed on both sides of the on-off valve for opening and closing the flow path.

On the other hand, according to another field of the present invention, a plurality of indoor units disposed in the room having an indoor heat exchanger; An outdoor unit having a compressor; An outdoor heat exchanger disposed to be heat-exchangable with any one of a low temperature fluid having a lower temperature than the refrigerant to be condensed therein and a high temperature fluid having a higher temperature than the refrigerant to be evaporated therein; A distributor for allowing the refrigerant to be appropriately provided according to the cooling operation and the heating operation state of each indoor unit; A cooling tower providing low temperature fluid to the outdoor heat exchanger to condense the refrigerant of the outdoor heat exchanger; Provided is a building air conditioning simultaneous multi-air conditioner comprising a boiler for providing a high-temperature fluid to the outdoor heat exchanger so that the refrigerant of the outdoor heat exchanger to absorb the latent heat of evaporation.

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

2 is a configuration of a refrigeration cycle of a building air-conditioning simultaneous multi air conditioner according to an embodiment of the present invention. As shown, the simultaneous air-conditioning type multi air conditioner for the building includes a plurality of indoor units 11, a compressor 23, and an indoor unit having an indoor heat exchanger 12 and an indoor expansion device 13. It is possible to exchange heat with either an outdoor unit 21 having a pair of air-cooled outdoor heat exchangers 27 and a low temperature fluid having a lower temperature than the refrigerant to be condensed therein and a high temperature fluid having a temperature higher than the refrigerant to be evaporated therein. The outdoor heat exchanger 51 and the distributor 41 may be provided so that the refrigerant can be appropriately provided according to the cooling operation and the heating operation state of each indoor unit 11.

The outdoor unit 21 includes a plurality of compressors 23 for compressing a refrigerant, a four-way valve 25 disposed on the discharge side of the compressor 23, and a pair of air-cooled outdoor units connected to the discharge side of the four-way valve 25. The heat exchanger 27 is provided. The discharge side of the compressor 23 is connected in communication with each other and is connected to the suction side of the four-way valve 25, the accumulator 24 is connected to the suction side of the compressor 23.

One end of the high-pressure engine 35 is connected to the refrigerant pipe connecting the discharge side of the compressor 23 and the four-way valve 25 so that the refrigerant compressed by the compressor 23 can flow to the indoor unit 11 side. In addition, one side of the outdoor heat exchanger 27 is provided with a blowing fan 28 to promote the flow of air.

One side of the outdoor heat exchanger (27) is connected with a high pressure liquid tube (37) so that the refrigerant via the outdoor heat exchanger (27) flows to the indoor unit (11), and the high pressure liquid tube (37) performs outdoor heat exchange during heating. A check valve 29, a bypass passage 31, and an outdoor expansion device 33 are provided for allowing the refrigerant to expand under reduced pressure before the gas 27 is introduced.

A distributor 41 is provided between the outdoor unit 21 and the indoor unit 11 so that the refrigerant can be appropriately provided according to the cooling and / or heating operation state of each indoor unit 11.

The distributor 41 is connected to the high-pressure engine section 42a through which the high-pressure gaseous refrigerant flows, and the indoor expansion device 13 of each indoor heat exchanger 12, and the high-pressure liquid refrigerant flows therein. It consists of the high pressure liquid pipe part 42b and the low pressure engine part 42c which the refrigerant | coolant of the low pressure gas state which flows through each indoor heat exchanger 12 flows. The mutually joined low pressure engine section 42c is connected in communication with the suction side of the accumulator 24 and corresponds to the high pressure engine section 42a and the low pressure engine section 42c respectively connected to each indoor heat exchanger 12. High pressure valve 43 and low pressure valve 44 are respectively provided to open and close the flow path.

Meanwhile, an outdoor heat exchanger 51 is disposed at one side of the outdoor unit 21 so as to selectively heat exchange with the high temperature fluid and the low temperature fluid, respectively. One side of the outdoor heat exchanger 51 is connected to the refrigerant pipe connecting the air-cooled outdoor heat exchanger 27 and the four-way valve 25, and the other side is connected to the high-pressure liquid pipe 37. Each branch or confluence area of the outdoor heat exchanger 51 and the air-cooled outdoor heat exchanger 27 is provided with an opening and closing valve 53 so as to open and close the corresponding flow path, respectively, and the outdoor heat exchanger 51 and one side opening and closing valve. In the interregion 53, when the outdoor heat exchanger 51 functions as an evaporator, a check valve 54, a bypass passage 55, and an outdoor expansion device 56 are provided so that the refrigerant can be bypassed to expand under reduced pressure. have.

When the outdoor heat exchanger 51 functions as a condenser and an evaporator, respectively, the low temperature fluid circulation passage 61a and the high temperature fluid circulation passage 65a are formed to selectively heat exchange with the low temperature fluid and the high temperature fluid.

The low temperature fluid circulation path 61a is provided with a cooling tower 62 for lowering the temperature of the fluid to be a low temperature fluid, and a low temperature fluid pump 63 for circulating the low temperature fluid, respectively. A boiler 66 for raising the temperature to become a high temperature fluid, a high temperature fluid pump 67 for circulating the high temperature fluid, and a collecting tank 68 are provided.

3 is a view showing a state of use of the air-conditioning simultaneous multi-air conditioner for the building of FIG. As shown in the figure, a divider 41 is arranged for each floor in the interior of the building, and each dispenser 41 is connected to an indoor unit 11 disposed in each indoor space of the corresponding floor.

A plurality of outdoor units 21 having a compressor 23 and an air-cooled outdoor heat exchanger 27 are arranged on the roof of the building, and an outdoor heat exchanger 51 is provided on one side of the outdoor unit 21.

One side of the outdoor heat exchanger (51) is provided with a cooling tower (62) for providing a low-temperature fluid so that the refrigerant of the outdoor heat exchanger (51) can be condensed, and the refrigerant in the outdoor heat exchanger (51) evaporates latent heat in the basement layer. A boiler 66 is provided which provides a high temperature fluid for absorption.

According to this configuration, in the case of the so-called cooling main body operation in which all the indoor units 11 to be operated are cooled, or the number of the indoor units 11 in which the cooling unit is operated is more than the number of the indoor units 11 in which they are heated. The refrigerant compressed by the compressor 23 flows to the air-cooled outdoor heat exchanger 27 and / or the outdoor heat exchanger 51 via the four-way valve 25. Here, the air-cooled outdoor heat exchanger 27 and the outdoor heat exchanger 51 or all of the outdoor heat exchanger 51 and the air-cooled outdoor heat exchanger 27 in consideration of the capacity, the outdoor temperature condition, and the operating load of the indoor unit 11. Some are driven.

When the outdoor heat exchanger 51 operates, the low temperature fluid pump 63 causes the low temperature fluid to flow to the cooling tower 62 so that the cooled low temperature fluid is circulated along the low temperature fluid circulation passage 61a. The refrigerant introduced into the outdoor heat exchanger 51 is cooled and condensed by the low temperature fluid, and flows through the check valve 29 to the distributor 41 along the high pressure liquid pipe 37. The refrigerant flowing along the high pressure liquid pipe part 42b of the distributor 41 flows into the indoor expansion device 13 of the indoor unit 11 which is operated in a cooling operation to perform a cooling function to absorb the latent heat of the surroundings, and the low pressure engine part ( Flow along 42c) flows into the accumulator 24.

On the other hand, in the case of the so-called heating main body operation in which the total number of the indoor unit 11 in which all the indoor units 11 are heated or the indoor unit 11 in which the heating operation is cooled is more than the number of the indoor units 11 in which the air is operated. The refrigerant compressed in 23 is moved to the distributor 41 along the high-pressure engine 35 and flows into the indoor heat exchanger 12 of the indoor unit 11 which is heated and operated by the distributor 41 to perform a heating function. do. Some of the refrigerant that performs the heating function is introduced into the indoor unit 11 that is cooled and operated, and some of the refrigerant flows along the high pressure liquid tube 37. At this time, all of the air-cooled outdoor heat exchanger 27 and the outdoor heat exchanger 51 in consideration of the capacity of the outdoor heat exchanger 51 and the air-cooled outdoor heat exchanger 27, the outdoor temperature condition, and the operating load of the indoor unit 11. Or part is driven.

When the outdoor heat exchanger 51 is operated, the refrigerant flowing along the high pressure liquid pipe 37 flows along the bypass passage 55, expands under reduced pressure through the outdoor expansion device 56, and then expands the outdoor heat exchanger 51. Flows into. At this time, the high temperature fluid pump 67 pumps the fluid of the collecting tank 68 to the boiler 66, and the high temperature fluid heated in the boiler 66 is the outdoor heat exchanger 51 along the high temperature fluid circulation passage 65a. Flows to The refrigerant, which is heat-exchanged with the high temperature fluid in the outdoor heat exchanger 51 and absorbs latent heat, is introduced into the accumulator 24 and is compressed and discharged from the compressor 23.

4 is a configuration of a refrigeration cycle of a building air-conditioning simultaneous multi air conditioner according to another embodiment of the present invention. Like reference numerals refer to like and corresponding embodiments, and like reference numerals are used for the convenience of description and detailed description thereof will be omitted. As shown, the simultaneous heating and cooling multi-air conditioner for a building includes a plurality of indoor units (11) arranged indoors, including an indoor heat exchanger (12) and an indoor expansion device (13), a compressor (23), and a compressor. An outdoor heat exchanger (51) connected to the discharge side of (23) to be selectively heat exchanged with any one of a low temperature fluid having a lower temperature than the refrigerant to be condensed therein and a high temperature fluid having a temperature higher than the refrigerant to be evaporated therein; It comprises a plurality of outdoor unit 21 having a, and a distributor 41 so that the refrigerant can be appropriately provided according to the cooling operation and heating operation state of each indoor unit (11).

The outdoor unit 21 includes a compressor 23, a four-way valve 25 disposed on the discharge side of the compressor 23 to switch the flow path, and an outdoor heat exchanger 51 connected to the discharge part of the four-way valve 25. Equipped with.

One end of the high pressure liquid pipe 37 is connected to the outlet side of the outdoor heat exchanger 51 along the flow direction of the refrigerant during the cooling operation so that the refrigerant via the outdoor heat exchanger 51 flows to the distributor 41. The high-pressure liquid tube 37 is provided with a check valve 29, a bypass passage 31, and an outdoor expansion device 33 to allow the refrigerant to expand under reduced pressure during heating operation.

Meanwhile, the outdoor heat exchanger 51 has a low temperature fluid circulation passage 61a to provide a low temperature fluid to cool the refrigerant of the outdoor heat exchanger 51 during the cooling operation, and the outdoor heat exchanger 51 during the heating operation. The high temperature fluid circulation passage 65a is selectively formed to be capable of heat exchanging so as to provide a high temperature fluid so that the refrigerant may absorb latent heat and evaporate.

The low temperature fluid circulation passage 61a is provided with a low temperature fluid pump 63 for circulating the fluid and a cooling tower 62 for cooling the fluid. In the upstream region of the low temperature fluid pump 63 along the flow direction of the low temperature fluid, a low temperature fluid circulation path 61b is formed so that the low temperature fluid can be circulated through the plurality of outdoor heat exchangers 51. The low temperature fluid circulation passages 61a and 61b are provided with on / off valves 71 so as to open and close the passages 61a and 61b, respectively.

The high temperature fluid circulation path 65a is provided with a boiler 66 for heating the fluid, a high temperature fluid pump 67 for circulating the fluid, and a collecting tank 68. The hot fluid circulation passage 65b is formed in the downstream region of the boiler 66 along the circulation direction of the hot fluid so that the hot fluid can be circulated to each outdoor heat exchanger 51. Opening and closing valves 72 are provided to open and close the circulation passages 65a and 65b, respectively.

5 is a view showing a state of use of the air-conditioning simultaneous multi-air conditioner for the building of FIG. As shown, a distributor 41 is disposed on each floor of the building, and each of the distributors 41 is connected to a plurality of indoor units 11 arranged in each indoor space. Each floor of the building is provided with an outdoor unit 21 integrally formed with a compressor 23 and an outdoor heat exchanger 51 for each floor. The basement of the building is provided with a boiler 66, a high temperature fluid pump 67 and a collecting tank 68 to supply high temperature fluid to the outdoor heat exchanger 51 disposed on each floor. A cooling tower 62 is installed to supply low temperature fluid to the arranged outdoor heat exchanger 51.

With this configuration, in the case of the cooling chamber operation or the cooling main body operation for each floor, the refrigerant compressed by the compressor 23 flows into the outdoor heat exchanger 51 through the four-way valve 25. At this time, when the flow path connected to the outdoor heat exchanger 51 is operated and the low temperature fluid pump 63 is operated, the low temperature fluid cooled in the cooling tower 62 flows to the outdoor heat exchanger 51. The refrigerant cooled in the outdoor heat exchanger (51) flows into the distributor (41), flows into the indoor unit (11) during the cooling operation, performs a cooling function to absorb latent heat of evaporation, and then flows into the accumulator (24). 23) the process of being sucked, compressed and discharged is repeated.

On the other hand, in the case of the heating chamber operation or the main heating operation for each floor, the refrigerant compressed by the compressor 23 flows to the distributor 41 along the high-pressure engine 35, and the indoor unit 11 which is being heated in the distributor 41. ) Is flowed in to perform the heating function. During the operation of the heating main body, some of the refrigerant that has performed the heating function flows into the indoor unit 11 which is operated in the cooling operation, performs the cooling function, and then flows to the accumulator 24, and part of the refrigerant expands outdoors in the bypass passage 55. After expansion under reduced pressure in the device (56) is introduced into the outdoor heat exchanger (51). At this time, the hot fluid heated in the boiler 66 flows to the outdoor heat exchanger 51 in operation, and the refrigerant of the outdoor heat exchanger 51 absorbs latent heat and evaporates and then flows to the accumulator 24. . The refrigerant of the accumulator 24 is again sucked into the compressor 23 to be compressed and discharged.

As described above, according to the present invention, a plurality of indoor units, an outdoor unit having a compressor, a low temperature fluid having a lower temperature than the refrigerant to be condensed therein, and a high temperature fluid having a higher temperature than the refrigerant to be evaporated therein By providing an outdoor heat exchanger arranged to be selectively heat exchanged with any one of them, and a distributor for providing refrigerant appropriately according to the operating state of each indoor unit, a partial operation in which only some indoor units are operated is possible and different indoor units can be operated. It is provided with simultaneous air-conditioning and multi-air conditioners for buildings that can simultaneously cool and heat.

Claims (11)

A plurality of indoor units disposed indoors with an indoor heat exchanger; An outdoor unit having a compressor; An outdoor heat exchanger disposed to be selectively heat exchanged with any one of a low temperature fluid having a lower temperature than the refrigerant to be condensed therein and a high temperature fluid having a higher temperature than the refrigerant to be evaporated therein; Cooling and heating simultaneous multi-air conditioner for a building, characterized in that it comprises a distributor so that the refrigerant can be appropriately provided according to the cooling operation and heating operation state of each indoor unit. The method of claim 1, And a cooling tower providing a low temperature fluid having a lower temperature than the refrigerant of the outdoor heat exchanger so that the refrigerant of the outdoor heat exchanger can be condensed. The method of claim 2, The cooling tower and the outdoor heat exchanger further comprises a low temperature fluid circulation passage formed to allow the low temperature fluid to circulate, and a low temperature fluid pump disposed in the low temperature fluid circulation passage to allow the low temperature fluid to circulate along the low temperature fluid circulation passage. Air-conditioning simultaneous type multi air conditioner for buildings comprising a. The method of claim 1, And a boiler providing a high temperature fluid having a higher temperature than the refrigerant of the outdoor heat exchanger such that the refrigerant of the outdoor heat exchanger absorbs latent heat of evaporation. The method of claim 4, wherein The hot fluid circulation passage formed so that the hot fluid heated in the boiler circulates between the boiler and the outdoor heat exchanger and the hot fluid circulation passage are disposed so that the high temperature fluid is circulated along the hot fluid circulation passage. Building air-conditioning simultaneous multi-air conditioner, characterized in that it further comprises a high-temperature fluid pump. The method of claim 5, The air conditioner for simultaneous heating and cooling of a building further comprising a collecting tank disposed upstream of the high temperature fluid pump along a circulation direction of the high temperature fluid. The method according to any one of claims 1 to 6, The outdoor heat exchanger is a heating and cooling simultaneous multi-type air conditioner for building, characterized in that formed integrally with the outdoor unit. The method according to any one of claims 1 to 6, The outdoor unit air-conditioning simultaneous multi-air conditioner for a building, characterized in that it further comprises an air-cooled outdoor heat exchanger is formed so that the refrigerant inside the heat exchange with the air. The method of claim 8, Cooling and heating simultaneous multi-air conditioner for a building, characterized in that it further comprises a blowing fan for blowing the heat exchange of the air-cooled outdoor heat exchanger. The method of claim 8, The air conditioner for simultaneous heating and cooling of a building further comprising an on / off valve disposed on both sides of the outdoor heat exchanger and the air-cooled outdoor heat exchanger. A plurality of indoor units disposed indoors with an indoor heat exchanger; An outdoor unit having a compressor; An outdoor heat exchanger disposed to be heat-exchangable with any one of a low temperature fluid having a lower temperature than the refrigerant to be condensed therein and a high temperature fluid having a higher temperature than the refrigerant to be evaporated therein; A distributor for allowing the refrigerant to be appropriately provided according to the cooling operation and the heating operation state of each indoor unit; A cooling tower providing low temperature fluid to the outdoor heat exchanger to condense the refrigerant of the outdoor heat exchanger; And simultaneous heating and cooling of the outdoor heat exchanger comprises a boiler for providing a high temperature fluid to the outdoor heat exchanger to absorb latent heat of evaporation.