JP5268136B2 - Heat pump air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat pump type air conditioning device capable of improving efficiency of a refrigerating cycle by utilizing the condensation water, excess water and the like which are conventionally discarded to the external. <P>SOLUTION: In this heat pump type air conditioning device which is provided with a supply air flow channel 4 from an outside air inlet 2 to an air supply opening 3 connected with an air supply duct of an air-conditioned room, and a return air flow channel 7 from an air return opening 5 connected with a return air duct from the air-conditioned room to an exhaust opening 6 in a casing 1, and in which a refrigerant from a compressor 14 is circulated through an air supply side heat exchanger 9 disposed in the supply air flow channel 4 and a return air side heat exchanger 12 disposed in the return air flow channel 7 by order of the return air side heat exchanger 12 and the supply air side heat exchanger 9 or its reverse order to switch a cooling operation and a heating operation to the air-conditioned room, a drain pan 20a is disposed at a lower part of the supply air side heat exchanger 9, a water storage tank 21 is disposed to receive and store the water captured in the drain pan 20a, and a refrigerant pipe 23 for circulating the refrigerant from the compressor 14 to the return air side heat exchanger 12 and the supply air side heat exchanger 9 is disposed through the water in the water storage tank 21. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a heat pump type air conditioner that can selectively perform cooling operation and heating operation by switching operation of a refrigerant circuit, and in particular, condensate water during cooling and dehumidification, and surplus water during humidification. The present invention relates to a heat pump type air conditioner that can be utilized to improve the efficiency of a refrigeration cycle.

In the outside air introduction type heat pump type air conditioner, the air supply side heat exchanger acts as an evaporator during cooling operation, and surplus water in the introduced outside air is condensed by cooling, and the condensed water is externally supplied as drain water. It is supposed to be discharged. On the other hand, at the time of heating operation, a humidifier is disposed on the downstream side of the air supply side heat exchanger, and humidifying water is dropped into the humidifier, so that excess water is discharged to the outside as drain water ( For example, see Patent Document 1 and Patent Document 2). In addition, the condensed water discharged to the outside is not currently used.
Japanese Patent No. 3945301 JP 2003-42479 A

  As described above, in the conventional outside air introduction type heat pump type air conditioner, the water condensed during the cooling operation and the excess water used in the humidifier are discharged to the outside as drain water and are not particularly utilized. .

  Therefore, a technical problem to be solved arises in order to provide a heat pump type air conditioner that improves the efficiency of the refrigeration cycle by utilizing condensate water, surplus water, etc. that have been discarded to the outside. The present invention aims to solve this problem.

The present invention has been proposed in order to achieve the above object, and the invention according to claim 1 is characterized in that the air supply air from the outside air inlet to the air inlet to which the air supply duct of the air-conditioned room is connected is provided in the casing. And a return air flow path from the return air port to which the return air duct from the air-conditioned room is connected to the external exhaust port is partitioned by the partition plate, with the supply air flow channel at the top and the return air flow channel at the bottom. The return air side heat exchange of the refrigerant from the compressor to the supply side heat exchanger and humidifier provided in the supply air flow path and the return air side heat exchanger provided in the return air flow path In the heat pump type air conditioner configured to switch between the cooling operation and the heating operation for the air-conditioned room by circulating in the order of the heat exchanger and the air supply side heat exchanger, or vice versa,
A drain pan provided below the air supply side heat exchanger and the humidifier, and a water storage tank disposed in the return air flow path for receiving and collecting water collected by the drain pan, from the compressor While passing a refrigerant pipe for circulating the refrigerant through the return air side heat exchanger and the air supply side heat exchanger in a state of being spirally submerged in the water of the water storage tank,
A drain hose having one end connected to the bottom of the drain pan is connected to the water storage tank through the partition plate, and the drain water collected by the drain pan is stored in the water tank by natural fall. the other end of the drain hose connecting the one end to the bottom of the drain pan is made is connected to the water storage tank,
Furthermore, the water storage tank, connects the drain hose to the drain pan provided below the return air-side heat exchanger, a drain water collected in the drain pan so that it can be returned through the drain hose, the drain hose connection Provided is a heat pump type air conditioner.

  According to this configuration, during the heating operation, the refrigerant from the compressor is sent to the supply side heat exchanger via the four-way valve or the like, and condensed by heat exchange with the air flowing through the supply passage. Heat the air in the side channel. The condensed refrigerant flows through the refrigerant pipe provided in the water storage tank, is sent to the return air side heat exchanger, is evaporated by the return air side heat exchanger, and passes through the return air flow path. After depriving of heat, it is sent to an accumulator or the like for gas-liquid separation and returned to the compressor. In addition, the air heated with the air supply side heat exchanger is sent to an air-conditioned room.

On the other hand, during the cooling operation, the refrigerant from the compressor is sent to the return air side heat exchanger via a four-way valve or the like, and is condensed by heat exchange with the air flowing through the return air passage. The condensed refrigerant flows through the refrigerant piping in the water storage tank and is sent to the supply side heat exchanger. The condensed refrigerant is evaporated by the supply side heat exchanger, and the heat of the air passing through the supply passage is removed. After that, it is sent to an accumulator or the like for gas-liquid separation and returned to the compressor. In addition, the air cooled with the air supply side heat exchanger is sent to an air-conditioned room.

  Therefore, the refrigerant condensed in the air supply side heat exchanger or the return air side heat exchanger passes through the refrigerant pipe disposed in the water of the water tank, and a part of the refrigerant is heat-exchanged in the refrigerant pipe. After that, it is sent to the return air side heat exchanger or the supply air side heat exchanger, evaporated in the return air side heat exchanger or the supply air side heat exchanger, then gas-liquid separated and returned to the compressor .

  According to this configuration, drain water such as condensed water and humidified surplus water generated on the air supply side can be collected by the drain pan and stored in the water storage tank.

In the first aspect of the present invention, the refrigerant condensed in the intake side heat exchanger or the return air side heat exchanger and sent to the return air side heat exchanger or the intake side heat exchanger is collected and stored by the drain pan. Since the water in the storage tank is heat-exchanged and cooled and then sent to the return air side heat exchanger or the intake side heat exchanger, high efficiency of the refrigeration cycle can be realized at low cost. Then, to dispose by passing in a state where a refrigerant pipe allowed to flow into the return air side heat exchanger and the air supply side heat exchanger refrigerant submerged spirally in water of the water tank from the compressor Therefore, since the heat of the refrigerant flowing in the refrigerant pipe can be efficiently exchanged with the water in the water storage tank and lowered, the efficiency of the refrigeration cycle can be further improved.

This invention, since the effective use of both the water condensate and humidification excess water generated by the supply side, in addition to the above effects, further low cost high efficiency of the refrigeration cycle. In addition, a drain hose having one end connected to the bottom of the drain pan is connected to the water storage tank through the partition plate so that the drain water collected by the drain pan can be stored in the water tank by natural fall. Therefore, the other end of the drain hose, which has one end connected to the bottom of the drain pan, is connected to the water storage layer, and the water storage tank has a drain pan provided at one end below the return air side heat exchanger. Since the drain hose is connected so that the collected condensed water and surplus water can be returned through the drain hose, both the drain pan below the air supply side heat exchanger and the drain pan below the return air side heat exchanger The generated condensed water and surplus water can be used effectively and the efficiency of the refrigeration cycle can be increased at a reduced cost.

  In order to achieve the purpose of improving the efficiency of the refrigeration cycle by utilizing the condensed water that has been thrown away outside, the air supply port to which the air supply duct of the air-conditioned room is connected from the outside air inlet in the casing And a supply air side heat provided in the supply air channel, and a return air channel from the return air port to which the return air duct from the air-conditioned room is connected to the external exhaust port. The refrigerant from the compressor is circulated in the order of the return air side heat exchanger and the supply air side heat exchanger or vice versa with respect to the return air side heat exchanger provided in the exchanger and the return air flow path. In the heat pump type air conditioner configured to switch between the cooling operation and the heating operation for the air-conditioned room, a drain pan provided below the air supply side heat exchanger and water collected by the drain pan are received. It has a water storage tank to store and the compressor The refrigerant is realized by a refrigerant pipe allowed to flow into the return air side heat exchanger and the air supply side heat exchanger is provided through the water of the water tank.

  Hereinafter, the heat pump type air conditioner of the present invention will be described with reference to preferred embodiments.

  FIG. 1 is a system diagram showing a configuration of a heat pump type air conditioner according to the present invention. In FIG. 1, in a casing 1, an air supply passage 4 extending from an outside air inlet 2 to an air supply port 3 to which an air supply duct (not shown) of the air-conditioned room is connected, and return air from the air-conditioned room A partition plate 8 partitions a return air flow path 7 from the return air port 5 to which the duct is connected to the exhaust port 6 to the outside.

The air supply passage 4 is provided with an air supply side heat exchanger 9, a humidifier 10, and a blower 11 in order from the outside air inlet 2 side toward the air inlet 3. In addition, a drain pan 20a is provided below the air supply side heat exchanger 9 and the humidifier 10 so as to straddle the air supply side heat exchanger 9 and the humidifier 10, and the air supply side heat exchanger 9 side is provided. The condensate generated in step 1 and excess water in the humidifier 10 can be collected by the drain pan 20a.

  On the other hand, the return air flow path 7 is provided with a return air side heat exchanger 12 and a blower 13 in order from the return air port 5 toward the exhaust port 6. Further, a compressor 14 of a refrigerant circuit is provided between the return air port 5 and the return air side heat exchanger 12 in the return air flow path 7. The refrigerant from the compressor 14 is supplied by switching the supply-side heat exchanger 9 and the return-air side heat exchanger 12 in this order and vice versa by the four-way switching valve 15, and the accumulator 16 is supplied to the compressor 14. The heating operation and the cooling operation are switched by switching the four-way switching valve 15. The compressor 14, the four-way switching valve 15, and the accumulator 16 may be provided at other positions.

  In addition, a water storage tank 21 is provided on the return air flow path 7 side, and straddles the water storage tank 21, the return air side heat exchanger 12, the accumulator 16, the compressor 14, and the four-way switching valve 15. A drain pan 20b is provided so that condensed water or the like generated on the return air side heat exchanger 12 side can be collected by the drain pan 20b.

  The water storage tank 21 is provided with a refrigerant pipe 23 that circulates the refrigerant from the compressor 14 to the return air side heat exchanger 12 and the air supply side heat exchanger 9 in a spirally submerged state. Yes. The refrigerant pipe 23 can reduce the heat of the refrigerant flowing through the refrigerant pipe 23 by efficiently exchanging heat with the water in the water storage tank 21.

  In addition, the other end of a drain hose 22a having one end connected to the bottom of the drain pan 20a is connected to the water storage tank 21 via a partition plate 8, and the drain water collected by the drain pan 20a is stored in the water storage tank. It can be stored in 21 by natural fall and used as cooling water. Furthermore, the other end of a drain hose 22b having one end connected to the bottom of the drain pan 20b is connected to the water storage tank 21, and the condensed water and excess water collected by the drain pan 20b are returned to the water storage tank 21. Be able to. In addition, when the condensed water from the drain pan 20b cannot be poured back into the water storage tank 21 by natural fall, a water pump is appropriately provided in the middle of the drain hose 22b. Moreover, when there is a shortage of surplus water, tap water is supplied to the water storage tank 21 to compensate.

  In FIG. 1, reference numerals 17a and 17b denote an expansion valve for the supply air side heat exchanger 9 and an expansion valve for the return air side heat exchanger 12, respectively, and 18a and 18b denote supply air side heat exchangers, respectively. 9 check valve and return air side heat exchanger 12 check valve. Reference numerals 19a and 19b denote a temperature sensing cylinder for the supply-side heat exchanger 9 and a temperature sensing cylinder for the return air-side heat exchanger 12, which control the expansion valves 17a and 17b, respectively.

  Next, operation | movement of the heat pump type air conditioning apparatus comprised in this way is demonstrated. First, at the time of heating operation, as indicated by broken line arrows in FIG. 1, the refrigerant from the compressor 14 is sent to the supply side heat exchanger 9 via the four-way valve 15 and flows through the supply passage 4. It condenses by heat exchange with air and heats the air in the supply side flow path 4. Further, the condensed refrigerant is sent to the return air side heat exchanger 12 through the refrigerant pipe 23 disposed in the water of the water storage tank 21, and is evaporated and returned by the return air side heat exchanger 12. The heat of the air passing through the air flow path 7 is taken away, and then sent to the accumulator 16 where it is gas-liquid separated and returned to the compressor 14. In addition, the air heated with the air supply side heat exchanger 9 is sent to an air-conditioned room. In addition, the water temperature in the water storage tank 21 here is substantially equal to the temperature of the humidified surplus water during the winter heating operation, and is about 15 to 25 ° C., from the supply air side heat exchanger 9 to the return air side heat exchanger 12. The temperature of the refrigerant sent out is about 30 to 40 ° C. When the refrigerant flows in the refrigerant pipe 23 of the water storage tank 21, the refrigerant is deprived of about 80% of the heat and is sent to the return air side heat exchanger 12 with the temperature lowered to 24 to 32 ° C.

  On the other hand, during the cooling operation, as indicated by a solid line arrow in FIG. 1, the refrigerant from the compressor 14 is sent to the return air side heat exchanger 12 through the four-way valve 15 and flows through the return air flow path 7. It is condensed by heat exchange with air. Further, the condensed refrigerant is sent to the supply side heat exchanger 9 through the refrigerant pipe 23 in the water storage tank 21 and is evaporated in the supply side heat exchanger 9 to flow through the supply passage 4. The excess air is deprived of heat and cooled, and then sent to the accumulator 16 where it is gas-liquid separated and returned to the compressor 14. In addition, the air cooled with the air supply side heat exchanger 9 is sent to an air-conditioned room. Further, the water temperature in the water storage tank 21 here is approximately equal to the temperature of the condensed water during the cooling operation in summer, and is about 15 to 25 ° C., from the return air side heat exchanger 12 to the supply side heat exchanger 9. The temperature of the refrigerant sent out is about 40-50 ° C. When the refrigerant flows through the refrigerant pipe 23 in the water storage tank 21 as well, the refrigerant is deprived of about 80% of the heat and is sent to the supply-side heat exchanger 12 with the temperature lowered to 32 to 40 ° C.

  Therefore, according to the heat pump type air conditioner of this embodiment, the air is condensed in the supply air side heat exchanger 9 or the return air side heat exchanger 12, and is returned to the return air side heat exchanger 12 or the supply air side heat exchanger 9. The refrigerant to be sent is cooled by exchanging heat in the water storage tank 21 where the condensed water at the time of cooling dehumidification and the surplus water at the time of humidification which have been discarded without being used are collected and collected by the drain pans 20a and 20b. Then, since it is sent to the return air side heat exchanger 12 or the supply side heat exchanger 9, high efficiency of the refrigeration cycle can be realized at low cost.

  It should be noted that the present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified ones.

The system diagram which shows the structure of the heat pump type air conditioning apparatus which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Casing 2 Outside air inlet 3 Air inlet 4 Supply air flow path 5 Return air outlet 6 Exhaust outlet 7 Return air flow path 8 Partition plate 9 Supply side heat exchanger 10 Humidifier 11 Blower 12 Return air side heat exchanger 13 Blower 14 Compression Machine 15 Four-way selector valve 16 Accumulator 20a Drain pan 20b Drain pan 21 Water tank 22a Drain hose 22b Drain hose 23 Refrigerant piping

Claims (1)

In the casing, an air supply passage extending from an outside air inlet to an air supply port to which an air supply duct of the air-conditioned room is connected, and a return air port connected to the return air duct from the air-conditioned room to an external exhaust port The return air flow path is provided with a partition plate and the supply air flow path is divided into the upper part and the return air flow path is divided into the lower part, and the supply air side heat exchanger and humidifier provided in the supply air flow path and the return air flow The refrigerant from the compressor is circulated in the order of the return-side heat exchanger and the supply-side heat exchanger or vice versa with respect to the return-side heat exchanger provided in the passage to cool the air-conditioned room In a heat pump air conditioner configured to switch between operation and heating operation,
A drain pan provided below the air supply side heat exchanger and the humidifier, and a water storage tank disposed in the return air flow path for receiving and collecting water collected by the drain pan, from the compressor While passing a refrigerant pipe for circulating the refrigerant through the return air side heat exchanger and the air supply side heat exchanger in a state of being spirally submerged in the water of the water storage tank,
A drain hose having one end connected to the bottom of the drain pan is connected to the water storage tank through the partition plate, and the drain water collected by the drain pan is stored in the water tank by natural fall. the other end of the drain hose connecting the one end to the bottom of the drain pan is made is connected to the water storage tank,
Furthermore, a drain hose is connected to the water storage tank so that a drain hose is connected to a drain pan provided below the return air side heat exchanger, and the drain water collected by the drain pan can be returned through the drain hose. The heat pump type air conditioner characterized by being made.

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