JP2018194215A - Air-conditioning apparatus and air-conditioning system - Google Patents

Abstract

To suitably process a dew-condensation water while efficiently reevaporating the dew-condensation water generated during a cooling process without causing increase in parts count and complication in the configuration.SOLUTION: There are provided: a cooling process part 21 for cooling a returned air RA from an air-condition target space so as to compensate a sensible heat load of the air-condition target space in the cooling process; an air supply part 22 for supplying the returned air RA after cooled in the cooling process part 21 as a supply air SA1 to the air-condition target space; and a reevaporating part 28 for reevaporating the dew-condensation water generated by the cooling process in the cooling process part 21. The reevaporating part 28 is configured to reevaporate the dew-condensation water by the returned air RA from the air-condition target space. The air supply part 22 is configured to supply returned air RA1, in addition to the returned air RA after cooling process, that has been used for reevaporation of the dew-condensation water in the reevaporating part as a supply air to the air-condition target space.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an air conditioner that performs air conditioning of a space to be air conditioned, and an air conditioning system including the air conditioner.

  In the air conditioner as described above, a cooling processing unit that cools the return air from the air-conditioning target space, and an air supply unit that supplies the return air after the cooling processing in the cooling processing unit to the air-conditioning target space as supply air Is provided. The air conditioner cools the air-conditioning target space by supplying the return air after the cooling process to the air-conditioning target space (see, for example, Patent Document 1).

  In such an air conditioner, when the return air is cooled in the cooling processing unit, condensed water may be generated. Therefore, it is required to take measures against the condensed water.

  In the air conditioner described in Patent Document 1, condensed water such as increasing the evaporation temperature of the refrigerant used for cooling the return air in the cooling process, or increasing the air volume of the return air supplied to the cooling processing unit. The cooling process is performed under the operating conditions for preventing the occurrence. Thereby, when the return air is cooled in the cooling processing section, the generation of condensed water is prevented.

  Moreover, in the air conditioning apparatus described in Patent Document 1, even when condensed water is generated, the condensed water is received by the receiving unit. Then, after the cooling operation in which the cooling processing is performed in the cooling processing unit, the condensed water received by the receiving unit is re-evaporated by performing a blowing operation for receiving the return air from the air-conditioning target space and blowing the air to the receiving unit. ing.

  As a configuration for re-evaporating the dew condensation water generated in the cooling process, there is also a structure for re-evaporating the dew condensation water by receiving the return air exhausted from the air-conditioning target space to the receiving part and blowing it to the receiving part (for example, Patent Document 2). reference.). In the air conditioner described in Patent Document 2, the object of the cooling process is not the return air from the air conditioning target space but the outside air, and the outside air after the cooling process is supplied to the air conditioning target space. Air conditioning is in progress.

JP 2003-106619 A JP2015-194304A

  In the air conditioner described in Patent Document 1, a blowing operation or the like is performed in order to re-evaporate the condensed water, but the blowing operation or the like is performed after the cooling operation. Therefore, during the execution of the cooling process that generates condensed water, the condensed water cannot be re-evaporated, and the condensed water cannot be re-evaporated efficiently. In addition, after the cooling operation, a blowing operation for re-evaporating the condensed water must be performed, which increases the energy consumption and increases the running cost.

  In the air conditioner described in Patent Literature 2, since the return air from the air-conditioning target space is exhausted to the outside even during the execution of the cooling process, the cooling process is performed by receiving the return air and blowing it to the catching part. Condensed water can be re-evaporated during execution. However, since the arrangement location of the cooling processing unit where the dew condensation water is generated and the arrangement location of the exhaust path for exhausting the return air from the air-conditioning target space to the outside are different, the dew condensation water generated in the cooling process is guided to the exhaust path. Therefore, it is necessary to provide various members for increasing the number of members and complicating the configuration.

  In view of this situation, the main problem of the present invention is that it is possible to efficiently re-evaporate the condensed water generated in the cooling process, and to deal with the condensed water without causing an increase in the number of members and a complicated configuration. An object of the present invention is to provide an air conditioner that can be appropriately performed.

The first characteristic configuration of the present invention is a cooling processing unit that cools the return air from the air conditioning target space so as to cover the sensible heat load of the air conditioning target space by the cooling process,
A supply air supply unit that supplies the return air after the cooling process in the cooling processing unit as supply air to the air-conditioning target space;
A re-evaporating unit that re-evaporates the condensed water generated by the cooling process in the cooling process unit,
The re-evaporating unit is configured to re-evaporate the condensed water with return air from the air-conditioning target space,
The supply air supply unit is configured to supply the return air used for re-evaporation of the condensed water in the re-evaporation unit as supply air to the air-conditioning target space in addition to the return air after the cooling process. In the point.

  According to this configuration, since the cooling processing unit performs the cooling processing so as to cover the sensible heat load of the air-conditioning target space, it can be prevented that condensed water is generated by the cooling processing itself. Since the re-evaporating unit re-evaporates the condensed water with the return air from the air-conditioning target space, the condensed water can be re-evaporated even if the condensed water is slightly generated by the cooling process. In this way, while performing the cooling process in a state that prevents the generation of condensed water, even if a small amount of condensed water is generated, the condensed water can be re-evaporated, so that the condensed water is drained to the outside. Equipment and the like may not be provided, and the apparatus configuration can be simplified.

  During the cooling process, the return air from the air-conditioning target space is supplied to the cooling processing unit, so the re-evaporation unit uses the original configuration of supplying the return air from the air-conditioning target space to the cooling processing unit. However, the condensed water can be re-evaporated during the cooling process. In addition to the return air after the cooling process, the supply air supply unit supplies the return air used for re-evaporation of the condensed water to the air-conditioning target space as the supply air, so that the return air from the air-conditioning target space is cooled. It is possible to appropriately re-evaporate condensed water while using the original function as an air conditioner that supplies the air to the air-conditioning target space as supply air to the air conditioning target air supply to the processing unit and the return air supplied to the cooling processing unit. it can. Therefore, while the condensed water generated in the cooling process can be efficiently re-evaporated, the originally provided configuration and functions can be fully utilized without increasing the number of members and complicating the configuration.

  The second characteristic configuration of the present invention lies in that the re-evaporating unit is configured to re-evaporate the condensed water with the return air before being cooled in the cooling processing unit.

  According to this configuration, the re-evaporating unit re-evaporates the condensed water with the return air before being subjected to the cooling treatment, so that the condensed water can be re-evaporated using the return air having a relatively high temperature. Re-evaporation of condensed water can be performed efficiently.

  The third characteristic configuration of the present invention is provided with a receiving portion that receives dew condensation water generated by the cooling process in the cooling processing portion, and the receiving portion is located at one end side portion below the other end side portion. The re-evaporating unit is configured to supply the return air to the one end portion located on the lower side and evaporate the condensed water in the receiving unit.

  As described above, since the cooling process unit performs the cooling process so as to cover the sensible heat load of the air-conditioning target space, there is a possibility that a slight amount of condensed water is generated by the cooling process. Therefore, according to this configuration, by providing the receiving portion in the inclined posture, condensed water that is slightly generated at one end side portion located on the lower side of the receiving portion can be collected. Since the re-evaporating part supplies the return air to the one end side part located on the lower side in the receiving part where the condensed water is collected, the re-evaporating part of the condensed water can be appropriately and efficiently performed.

  According to a fourth characteristic configuration of the present invention, the cooling processing unit is configured to cool the return air with cold water flowing from the upper end to the lower end, and the re-evaporating unit is configured such that the dew condensation water The dew condensation water is re-evaporated by the return air supplied to the cooling processing unit before falling to the lower end of the processing unit.

  According to this configuration, since the cooling processing unit cools the return air with the cold water flowing from the upper end toward the lower end, relatively low temperature cold water flows on the upper end side of the cooling processing unit. Therefore, condensed water may be generated by the cooling process of the cold water. The generated condensed water falls from the upper end side of the cooling processing unit toward the lower end portion. Therefore, the re-evaporating unit re-evaporates the condensed water with the return air supplied to the cooling processing unit until the condensed water falls to the lower end of the cooling processing unit. The re-evaporating unit uses the return air supplied to the lower end side of the cooling processing unit and can re-evaporate the condensed water until it falls to the lower end of the cooling processing unit. The re-evaporation of the condensed water can be efficiently performed while effectively using the configuration.

  According to a fifth characteristic configuration of the present invention, the cooling processing unit is configured to cool the return air with the refrigerant after expansion in the refrigerant circuit, and receives the dew condensation water generated by the cooling processing in the cooling processing unit. A heat exchanging pipe for allowing the refrigerant before expansion in the refrigerant circuit to flow in a manner that allows heat exchange with the dew condensation water to be received.

  According to this configuration, the receiving part is provided with the heat exchange pipe part through which the refrigerant before expansion in the refrigerant circuit flows, and the condensed water received by the refrigerant flowing through the heat exchange pipe part and the receiving part. And heat exchange is possible. By the heat exchange between the refrigerant and the condensed water, the condensed water can be re-evaporated, and the condensed water can be reliably re-evaporated.

  A sixth feature configuration of the present invention is an air conditioning system including the air conditioner according to any one of the first to fifth feature configurations described above, and includes a latent heat treatment air conditioner that covers the latent heat load of the air conditioning target space. There is in point.

  As described above, the cooling processing unit performs the cooling process so as to cover the sensible heat load of the air-conditioning target space, so that it can cover the sensible heat load of the air-conditioning target space while preventing the formation of condensed water. Cannot cover the latent heat treatment of the target space. Therefore, an air conditioning system that performs air conditioning of the air conditioning target space includes a latent heat treatment air conditioning device that covers the latent heat load of the air conditioning target space. As a result, the sensible heat load and latent heat load of the air-conditioning target space are shared by the air-conditioning apparatus having a cooling processing unit that covers the sensible heat load of the air-conditioning target space and the latent heat treatment air-conditioning apparatus, and the condensed water in the air-conditioning apparatus It is possible to appropriately air-condition the air-conditioning target space while preventing the occurrence of the above.

The figure which shows the whole air conditioning system outline Diagram showing schematic configuration of sensible heat treatment air conditioner Diagram showing schematic configuration of sensible heat treatment air conditioner The figure which shows schematic structure of the sensible heat processing air conditioner in 2nd Embodiment. The figure which shows schematic structure of the sensible heat processing air conditioner in 3rd Embodiment.

An embodiment of an air conditioning system provided with an air conditioner according to the present invention will be described based on the drawings.
[First Embodiment]
As shown in FIG. 1, this air conditioning system includes a sensible heat treatment air conditioner 2 (corresponding to the air conditioner of the present invention) that covers the sensible heat load of the air conditioned space 1 and a latent heat treatment that covers the latent heat load of the air conditioned space 1. An air conditioner 3 is provided.

  An underfloor space 6 is formed between the lower floor slab 4 and the flooring 5 on the floor side of the airconditioning target space 1. For example, the air conditioning target space 1 and the underfloor are provided by the floor side communication portion 7 provided in the flooring 5. The space 6 is in communication. On the ceiling side of the air conditioning target space 1, a ceiling space 10 is formed between the upper floor slab 8 and the ceiling material 9. For example, the air conditioning target space 1 and the ceiling are formed by the ceiling side communication portion 11 provided in the ceiling material 9. The space 10 is in communication.

  Incidentally, the space between the underfloor space 6 and the air-conditioning target space 1 and the space between the ceiling space 10 and the air-conditioning target space 1 are not limited to the floor side communication portion 7 and the ceiling side communication portion 11 but are communicated by other configurations. And various configurations can be applied. Although not shown, the ceiling space 10 is configured to be able to communicate with the outside through an external communication unit, and a part of the air in the ceiling space 10 is exhausted to the outside through the external communication unit. .

  The sensible heat treatment air conditioner 2 is arranged in the underfloor space 6 and supplies the sensible heat-treated air supply SA1 to the underfloor space 6 to supply the sensible heat-treated air supply SA1 from the floor side to the air-conditioning target space 1. Yes. The sensible heat suction passage 14 connected to the sensible heat treatment air conditioner 2 is open to the ceiling space 10 and sucks the return air RA from the air-conditioning target space 1 supplied to the ceiling space 10 through the ceiling side communication part 11. doing. The sensible heat treatment air conditioner 2 sucks the return air RA from the air-conditioning target space 1 from the ceiling side, and supplies the return air RA from the floor side of the air-conditioning target space 1 as sensible heat treatment (cooling treatment) supply air SA1. It is configured.

  For example, the latent heat treatment air conditioner 3 is disposed in an adjacent space 13 adjacent to the air conditioning target space 1 with the wall 12 interposed therebetween. The latent heat suction passage 15 connected to the latent heat treatment air conditioner 3 is open to the ceiling space 10 and sucks the return air RA from the air-conditioning target space 1 supplied to the ceiling space 10 through the ceiling side communication portion 11. ing. Although not shown, the latent heat treatment air conditioner 3 is configured to be able to introduce outside air, and the return air RA from the air-conditioning target space 1 is mixed with the introduced outside air as necessary to perform the latent heat treatment. Is configured to do. The latent heat supply path 16 connected to the latent heat treatment air conditioner 3 is open to the underfloor space 6, and the supply air SA 2 subjected to the latent heat treatment is supplied to the underfloor space 6, so Supply air SA2 subjected to latent heat treatment.

  When description is added about the latent heat treatment air conditioner 3, although illustration is abbreviate | omitted, in the latent heat treatment air conditioner 3, for example, the air (only the outside air or the mixture of the outside air and the return air RA) and the heat medium are introduced. The heat exchange part which heat-exchanges is provided. The latent heat treatment air conditioner 3 cools and dehumidifies the air introduced by the heat medium in the heat exchange unit, performs the latent heat treatment, and supplies the air supply SA2 after the latent heat treatment to the air conditioning target space 1 from the floor side. It is configured. About a heat exchange part, it can comprise in the cold water type which supplies the cold water from a cold source as a heat medium, or can comprise the direct expansion type which supplies the refrigerant | coolant after the expansion in a refrigerant circuit, for example. In addition to the heat exchange unit, the latent heat treatment air conditioner 3 can also include a total heat exchange unit that totally exchanges the return air exhausted from the air-conditioning target space 1 to the outside and the outside air. In this case, the latent heat treatment is performed by cooling and dehumidifying the outside air after the total heat exchange in the total heat exchange section.

Hereinafter, the sensible heat treatment air conditioner 2 will be described.
As shown in FIG. 2, the sensible heat treatment air conditioner 2 cools the return air RA from the air-conditioning target space 1, cools the return air RA, and supplies the return air RA after the cooling processing in the cooling processing unit 21 to the supply air SA1. The air supply unit 22 that supplies the air-conditioning target space 1 and the control unit 23 that controls the operation of the sensible heat treatment air conditioner 2 are provided.

  Incidentally, although not shown, the sensible heat treatment air conditioner 2 can include a heat treatment unit that heats the return air from the air-conditioning target space 1 in addition to the cooling treatment unit 21. In this case, the supply air supply unit 22 is configured to be able to supply the return air after the heat treatment in the heat treatment unit to the air-conditioning target space 1 as supply air. In this embodiment, the case where the air-conditioning target space 1 is cooled by the sensible heat treatment air-conditioning apparatus 2 will be described. Of course, the air-conditioning target space 1 may be heated by providing the sensible heat-treatment air-conditioning apparatus 2 with a heat treatment unit. it can.

  The cooling processing unit 21 includes a cooling coil that performs heat exchange between the supplied heat medium and the return air RA to cool the return air RA. 2 illustrates a direct expansion type cooling processing unit 21 that supplies the refrigerant B after being expanded by the expansion valve 25 in the refrigerant circuit 24 as a heat medium. The cooling processing unit 21 may be, for example, a cold water type that supplies cold water as a heat medium from a cold heat source, and is not limited to a direct expansion type, and various types of types can be applied.

  The supply air supply unit 22 sucks the return air RA from the air-conditioning target space 1 and supplies it to the cooling processing unit 21, and supplies the cooling processing unit 21 with the supplied air SA 1 after cooling processing to the air-conditioning target space 1. Consists of fans.

  The cooling processing unit 21 and the supply air supply unit 22 are provided in the casing 26 of the sensible heat treatment air conditioner 2, and the inside of the casing 26 is a ventilation space for allowing the return air RA and the supply air SA1 to flow.

  The controller 23 controls the operation of the sensible heat treatment air conditioner 2 by controlling the rotational speed of a compressor (not shown) in the refrigerant circuit 24 and the rotational speed of an air supply fan as the air supply unit 22. doing. The control unit 23 controls the operation of the sensible heat treatment air conditioner 2 so as to perform a cooling process under an operation condition that prevents the generation of condensed water.

  For example, the control unit 23 obtains the dew point temperature of the return air RA supplied to the cooling processing unit 21 based on detection information of various temperature and humidity sensors, and targets a temperature that is higher than the dew point temperature by a predetermined temperature difference. It is set as temperature. The target temperature may be set as long as it is a temperature that can prevent the generation of condensed water by the cooling process, and the setting method can be changed as appropriate.

  The control unit 23 controls the rotation speed of the compressor (not shown) in the refrigerant circuit 24 and the supply air supply unit 22 so that the temperature of the supply air SA1 after the cooling process in the cooling processing unit 21 becomes the target temperature. It controls the rotational speed of the air supply fan. For example, when the temperature of the supply air SA1 after the cooling process is lower than the target temperature, the control unit 23 reduces the rotation speed of the compressor (not shown) in the refrigerant circuit 24 to evaporate the refrigerant B. Or increasing the rotational speed of the supply fan as the supply air supply unit 22 to increase the air volume of the return air RA supplied to the cooling processing unit 21, thereby increasing the supply air SA1 after the cooling process. The temperature is set above the target temperature.

  In this way, the control unit 23 performs the rotation speed of the compressor and the supply as the supply air supply unit 22 under the operating conditions (the temperature of the supply air SA1 after the cooling process is set as the target temperature) that prevents the generation of condensed water. By controlling the rotational speed of the air fan and the like, the sensible heat treatment of the return air RA can be performed while preventing the generation of condensed water, and the sensible heat load of the air-conditioning target space 1 can be covered.

  Although the generation of condensed water in the cooling processing unit 21 is prevented by the control of the control unit 23, there is a possibility that the condensed water is slightly generated in the cooling processing unit 21 due to, for example, a control delay or other factors.

  Therefore, the sensible heat treatment air conditioner 2 includes a receiving unit 27 that receives dew condensation water generated by the cooling process in the cooling unit 21, and a re-evaporation unit 28 that re-evaporates the dew condensation water generated by the cooling process in the cooling unit 21. Is provided.

  When condensed water is generated in the cooling processing unit 21, the condensed water is generated on the surface of the cooling processing unit 21 and falls down through the cooling processing unit 21. The receiving portion 27 is formed in a dish shape having a larger area than the cooling processing portion 21, and is disposed on the lower side of the cooling processing portion 21 including directly under the cooling processing portion 21. The receiving portion 27 is provided in an inclined posture in which one end side portion 27a is positioned below the other end side portion 27b. In the receiving portion 27, one end side portion 27 a located on the lower side is located upstream of the cooling processing portion 21 in the ventilation direction of the return air RA or the like, and the other end portion 27 b located on the upper side is located on the cooling processing portion 21. Therefore, it is located downstream of the ventilation direction of the return air RA or the like.

  The re-evaporating unit 28 is configured to re-evaporate the condensed water with the return air RA from the air-conditioning target space 1. The supply air supply unit 22 supplies the return air RA1 (RA) used for re-evaporation of the condensed water in the re-evaporation unit 28 to the air-conditioning target space 1 as the supply air SA1 in addition to the return air RA after the cooling process. Is configured to do. Thus, the sensible heat treatment air conditioner 2 supplies the return air RA from the air conditioning target space 1 to the cooling processing unit 21 and supplies the return air RA supplied to the cooling processing unit 21 to the air conditioning target space 1 as the supply air SA1. It is possible to appropriately re-evaporate condensed water while using the original function as is.

  The re-evaporating unit 28 supplies the return air RA1 (RA) before being cooled in the cooling processing unit 21 to the one end side portion 27a located on the lower side in the receiving unit 27 so as to evaporate the condensed water. It is configured. Since the receiving portion 27 is in an inclined posture in which the one end side portion 27 a is positioned on the lower side, the slightly generated condensed water is collected in the one end side portion 27 a of the receiving portion 27. The re-evaporating unit 28 receives the return air RA ventilated by the air supply fan as the air supply unit 22 and directly vents the condensed water collected in the one end side portion 27a of the catching unit 27 to cause the condensed water to flow. Can be properly re-evaporated.

  The re-evaporating unit 28 only needs to adjust the ventilation direction of the air supply fan as the air supply unit 22, and can be configured from the air supply unit 22. In this embodiment, since the inside of the casing 26 is a ventilation space such as the return air RA, the return air RA is ventilated by the supply fan as the supply air supply unit 22 to receive not only the cooling processing unit 21 but also the catching air RA. The return air RA1 can also be ventilated to the one end portion 27a of the portion 27.

  2, the supply air supply unit 22 and the cooling processing unit 21 are arranged in this order in the casing 26 in the direction of ventilation of the return air RA or the like, but as shown in FIG. Further, the cooling processing unit 21 and the air supply unit 22 may be arranged in this order in the ventilation direction of the return air RA or the like. In FIG. 3, the receiving part 27 and the reevaporation part 28 can be provided similarly to FIG.

[Second Embodiment]
Since the second embodiment is different from the first embodiment in the configuration of the cooling processing unit 21 and the re-evaporating unit 28, only the cooling processing unit 21 and the re-evaporating unit 28 will be described based on FIG. . Since other configurations are the same as those of the first embodiment, description thereof is omitted.

  In 2nd Embodiment, as shown in FIG. 4, the cooling process part 21 is comprised by the cold water type which supplies the cold water C as a thermal medium from a cold heat source. The chilled water circuit 29 that supplies the chilled water C from the cold heat source to the cooling processing unit 21 is provided with a chilled water control valve 30 that can control the supply state of the chilled water C to the cooling processing unit 21. The cooling processing unit 21 is configured to cool the return air RA with cold water C flowing from the upper end portion toward the lower end portion. Thereby, since the comparatively low temperature cold water C distribute | circulates in the upper end part side of the cooling process part 21, the dew condensation water T may generate | occur | produce by the cooling process of the cold water C. FIG. The generated condensed water T falls along the surface of the cooling processing unit 21 from the upper end side of the cooling processing unit 21 toward the lower end.

  Therefore, the re-evaporating unit 28 is configured to re-evaporate the condensed water with the return air RA2 supplied to the cooling processing unit 21 until the condensed water falls to the lower end of the cooling processing unit 21. The re-evaporating unit 28 supplies the return air RA2 to the lower portion of the cooling processing unit 21 so that the condensed water T generated on the upper end side of the cooling processing unit 21 allows the return air RA2 to be ventilated during the fall. Therefore, the condensed water T can be re-evaporated before it falls to the lower end of the cooling processing unit 21.

  The re-evaporating unit 28 not only re-evaporates the condensed water T in the middle of the fall, but also supplies the return air RA1 to the one end side portion 27a located on the lower side in the receiving unit 27 as in the first embodiment. Thus, the dew condensation water of the receiving part 27 is configured to evaporate.

  The re-evaporating unit 28 only needs to adjust the ventilation direction of the air supply fan as the air supply unit 22, and can be configured from the air supply unit 22. In this embodiment, since the inside of the casing 26 is a ventilation space such as the return air RA, the upper side and the lower side of the cooling processing unit 21 are ventilated by the return air RA being ventilated by the air supply fan as the air supply unit 22. The return air RA1 can be ventilated not only to the side but also to the one end portion 27a of the receiving portion 27.

  In the second embodiment, as shown in FIG. 4, in the sensible heat treatment air conditioner 2, the supply air supply unit 22 and the cooling processing unit 21 are arranged in the casing 26 in the ventilation direction of the return air RA and the like in this order. Although not shown, the cooling processing unit 21 and the air supply unit 22 may be arranged in this order in the casing 26 in the direction of ventilation of the return air RA or the like, as in FIG.

[Third Embodiment]
Since the third embodiment differs from the first embodiment in the configuration of the refrigerant circuit 24 and the receiving portion 27, only the refrigerant circuit 24 and the receiving portion 27 will be described based on FIG. Since other configurations are the same as those of the first embodiment, description thereof is omitted.

  As shown in FIG. 5, the cooling processing unit 21 is configured to be a direct expansion type that cools the return air RA using the expanded refrigerant B in the refrigerant circuit 24, as in the first embodiment. The receiving portion 27 is provided with a heat exchanging piping portion 31 through which the refrigerant B before expansion in the refrigerant circuit 24 flows so as to exchange heat with the condensed water to be received.

  The heat exchanging piping section 31 is arranged in contact with the bottom side of the receiving section 27, and is configured to allow the refrigerant B before expansion to flow through the expansion valve 25 in the refrigerant circuit 24. The heat exchanging pipe portion 31 is configured to allow the refrigerant B to flow from the one end side portion 27a located on the lower side in the receiving portion 27 toward the other end side portion 27b. Since the refrigerant B flowing through the heat exchanging pipe portion 31 is not expanded by the expansion valve 25, it is at a relatively high temperature. Thereby, the refrigerant B flowing through the heat exchanging piping part 31 and the condensed water collected in the one end side portion 27a of the receiving part 27 exchange heat, whereby the condensed water can be re-evaporated.

[Another embodiment]
(1) Although the case where the sensible heat treatment air conditioner 2 is installed in the underfloor space 6 is shown in the above embodiment, for example, the sensible heat treatment air conditioner 2 can be installed in the ceiling space 10. The installation location can be changed as appropriate. Moreover, about the latent heat processing air conditioner 3, the installation location can be changed suitably.

(2) In the above embodiment, in addition to the return air RA after the cooling process, the return air RA used for the re-evaporation of the condensed water in the re-evaporation unit 28 is supplied to the air-conditioning target space 1 as the supply air SA1. Both the return air RA that has not been used for the re-evaporation of the dew condensation water and the return air RA that has been used for the re-evaporation of the dew condensation water are cooled in the cooling processing unit 21. The return air RA used in the above can be supplied to the air-conditioning target space 1 as the supply air SA1 without being cooled in the cooling processing unit 21.

1 Air-conditioning space 2 Sensible heat treatment air conditioner (air conditioner)
3 Subsurface heat treatment air conditioner 21 Cooling processing part 22 Supply air supply part 27 Receiving part 27a Receiving part one end side part 27b Receiving part other end part 28 Re-evaporation part 31 Heat exchange piping part RA Return air SA1

Claims (6)

A cooling processing unit for cooling the return air from the air-conditioning target space so as to cover the sensible heat load of the air-conditioning target space by the cooling process;
A supply air supply unit that supplies the return air after the cooling process in the cooling processing unit as supply air to the air-conditioning target space;
A re-evaporating unit that re-evaporates the condensed water generated by the cooling process in the cooling process unit,
The re-evaporating unit is configured to re-evaporate the condensed water with return air from the air-conditioning target space,
The supply air supply unit is configured to supply the return air used for re-evaporation of the condensed water in the re-evaporation unit as supply air to the air-conditioning target space in addition to the return air after the cooling process. Air conditioner.   The air conditioner according to claim 1, wherein the re-evaporating unit is configured to re-evaporate the condensed water with the return air before being cooled by the cooling processing unit.   A receiving portion for receiving dew condensation water generated by the cooling process in the cooling processing portion is provided, and the receiving portion is provided in an inclined posture in which one end side portion is located below the other end side portion, 3. The air conditioner according to claim 1, wherein the re-evaporating unit is configured to evaporate condensed water by supplying return air to one end side portion located on a lower side in the receiving unit.   The cooling processing unit is configured to cool the return air with cold water flowing from the upper end portion toward the lower end portion, and the re-evaporating unit is configured such that condensed water falls on the lower end portion of the cooling processing unit. Furthermore, the air conditioner of any one of Claims 1-3 comprised so that condensed water may be re-evaporated with the return air supplied to the said cooling process part.   The cooling processing unit is configured to cool the return air with the expanded refrigerant in the refrigerant circuit, and includes a receiving unit that receives dew condensation water generated by the cooling process in the cooling processing unit. The air conditioner according to any one of claims 1 to 3, further comprising a heat exchanging pipe portion through which the refrigerant before expansion in the refrigerant circuit flows so as to be able to exchange heat with the condensed water to be received. An air-conditioning system comprising the air-conditioning apparatus according to any one of claims 1 to 5, further comprising a latent heat treatment air-conditioning apparatus that covers a latent heat load of an air-conditioning target space.

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