JP2008170137A - Dehumidifying air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dehumidifying air conditioner capable of suppressing the degradation of dehumidifying capacity of treated air by sufficiently heating regenerated air in dehumidifying operation. <P>SOLUTION: The dehumidifying air conditioner comprises a dehumidifying rotor 20; an air supply unit 30 supplying the treated air into a store 1 in a mode of passing through a moisture adsorption area 31; an air discharging unit 40 discharging the regenerated air to the outside in a mode of passing through a moisture discharge area 41; a refrigerant compressor 51; and a heat pump unit 50 having a circuit formed by connecting a first heat exchanger 52 to a second heat exchanger 53, cooling the treated air passing through the first heat exchanger 52 toward the moisture adsorption area 31 in dehumidifying operation and heating the regenerated air passing through the second heat exchanger 53 toward the moisture discharge area 41. A condenser 60 heating the regenerated air passing toward the moisture discharge area 41 is provided separately from the heat pump unit 50. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a dehumidifying air conditioner, and more specifically, for example, a dehumidifying air conditioner that is applied to a store such as a supermarket, a convenience store, or a shopping center and has functions of ventilation, dehumidification, and air conditioning by introducing outside air into the room. Regarding improvements.

  2. Description of the Related Art Conventionally, as a dehumidifying air conditioner applied to, for example, a store such as a supermarket, a convenience store, or a shopping center, a device including a dehumidifying rotor, an air supply unit, an air discharge unit, and a heat pump unit is known.

  The dehumidification rotor is provided with, for example, a short-axis columnar moisture adsorbent. The moisture adsorbent is partitioned and divided into two, and rotates in such a manner as to alternately pass through the moisture adsorption region and the moisture release region that constitute the air flow path. When the moisture adsorbent rotates in this way, the portion located in the moisture adsorption area moves to the moisture release area and then moves again to the moisture adsorption area.

  The air supply unit has an air supply path incorporating the moisture adsorption region. This air supply unit becomes a target after the outside air (process air) is taken into the air supply path and the taken process air is passed through the moisture adsorption region by the operation of the blower fan disposed in the air supply path. It is supplied to the room (hereinafter also referred to as the target room).

  The air discharge unit is provided in parallel with the air supply path in a partitioned manner, and has an air discharge path that incorporates the moisture discharge region. This air discharge unit takes in outside air (regeneration air) into the air discharge path by operating a blower fan arranged in the air discharge path, and discharges the recovered air after passing it through the moisture discharge area. To do.

  The heat pump unit includes a refrigerant circulation circuit. The refrigerant circulation circuit is configured by sequentially connecting a compressor, a first heat exchanger, and a second heat exchanger with pipes, and a refrigerant is enclosed therein. The compressor compresses the refrigerant into a high temperature and high pressure state. The first heat exchanger is disposed in the upstream area of the moisture adsorption region in the air supply path, and exchanges heat between the refrigerant and the ambient air, that is, the processing air passing toward the moisture adsorption region. . The second heat exchanger is disposed in the upstream area of the moisture discharge area in the air discharge path, and exchanges heat between the refrigerant and the ambient air, that is, the regenerative air passing toward the moisture discharge area. .

  In such a heat pump unit, when the dehumidifying air conditioner performs a dehumidifying operation, the first heat exchanger is an evaporator and the second heat exchanger acts as a condenser to circulate the refrigerant so that the dehumidifying operation is performed. When the air conditioner performs heating operation, the first heat exchanger is a condenser, and the second heat exchanger circulates the refrigerant in such a manner that it acts as an evaporator. That is, when the dehumidifying air conditioner performs the dehumidifying operation and when performing the heating operation, the circulation direction of the refrigerant circulating in the refrigerant circulation circuit is opposite. Thus, the first heat exchanger evaporates the refrigerant during the dehumidifying operation and cools the processing air passing through the surroundings, and condenses the refrigerant during the heating operation and heats the processing air passing through the surroundings. The second heat exchanger condenses the refrigerant during the dehumidifying operation and heats the regenerated air passing through the surroundings, while evaporating the refrigerant during the heating operation to cool the regenerative air passing through the surroundings, in other words, heats from the regenerated air. It is a thing that draws up. Accordingly, during the dehumidifying operation, the heat pump unit draws heat from the processing air through the first heat exchanger and heats the regenerated air with the heat drawn through the second heat exchanger, while the second heat exchange during the heating operation. Heat is generated from the regenerated air through the vessel, and the processing air is heated with the heat drawn up through the first heat exchanger.

  In the conventional dehumidifying air conditioner having the above-described configuration, when performing the dehumidifying operation, the processing air is taken into the air supply path by the action of the blower fan, and the processing air passing through the first heat exchanger is cooled. By passing the cooled processing air through the moisture adsorption region, the moisture of the passing processing air is adsorbed by the moisture adsorbing body of the dehumidifying rotor and dehumidified, and the dehumidified air is introduced into the target chamber. Also, the moisture adsorber of the dehumidification rotor is obtained by taking the regeneration air into the air discharge path by the action of the blower fan, heating the regeneration air passing through the second heat exchanger, and passing the heated regeneration air to the moisture discharge region. Moisture is released and dried, and the regenerated air that has passed through the moisture release region is released to the outside.

  On the other hand, when performing the heating operation, the driving of the dehumidifying rotor is stopped and the circulation direction of the refrigerant in the refrigerant circuit constituting the heat pump unit is reversed. As a result, the regenerated air passing through the air discharge path is cooled through the second heat exchanger, and the cooled regenerated air is allowed to pass through the moisture discharge region and then released to the outside. Here, the regeneration air is cooled through the second heat exchanger, and this means that heat is generated in the refrigerant from the regeneration air through the second heat exchanger. Then, the processing air passing through the air supply path is heated through the first heat exchanger, and more specifically, the processing air passing through the second heat exchanger is heated using the heat generated from the regeneration air and heated. Process air is passed through the moisture adsorption region and then introduced into the target chamber (see, for example, Patent Document 1).

JP 2005-201624 A

  However, in the dehumidifying air conditioner as described above, when the outside air temperature is low during the dehumidifying operation, the amount of heat exchange between the refrigerant and the processing air through the first heat exchanger decreases, in other words, the first heat exchanger. The amount of heat absorbed from the processing air through the air is reduced, thereby reducing the amount of heat for heating the regeneration air through the second heat exchanger. If the amount of heat for heating the regeneration air through the second heat exchanger is reduced in this way, the regeneration air cannot be sufficiently heated. Therefore, even if the regeneration air passes through the moisture release region, the moisture adsorbent Thus, the moisture cannot be sufficiently released, and as a result, the dehumidifying ability of the processing air is lowered.

  In view of the above circumstances, an object of the present invention is to provide a dehumidifying air conditioner that can suppress a decrease in the dehumidifying capacity of the processing air by sufficiently heating the regenerated air during the dehumidifying operation.

  In order to achieve the above object, a dehumidifying air conditioner according to claim 1 of the present invention includes a dehumidification rotor that circulates and moves a moisture adsorbent between a partitioned moisture adsorption region and a moisture release region, and the moisture adsorption region. An air supply unit that supplies processing air introduced from the outside in a mode that allows the air to pass through the target chamber, an air discharge unit that discharges the regenerated air that has been introduced from the outside in a mode that allows the moisture release region to pass, and compresses the refrigerant And a refrigerant circulation circuit in which a first heat exchanger and a second heat exchanger for exchanging heat between the refrigerant and ambient air are sequentially connected by piping, and during the dehumidifying operation, During the heating operation, the processing air passing toward the moisture adsorption region through the first heat exchanger is cooled and the regeneration air passing toward the moisture release region through the second heat exchanger is heated. A dehumidification air conditioner comprising: a heat pump unit that reverses a refrigerant circulation direction in the refrigerant circulation circuit and heats processing air that passes through the first heat exchanger toward the moisture adsorption region. Is characterized by comprising heating means for separately heating the regeneration air passing toward the moisture release region.

  The dehumidifying air-conditioning apparatus according to claim 2 of the present invention is characterized in that, in claim 1 described above, the heating means heats the regenerated air passing toward the second heat exchanger.

  The dehumidifying air-conditioning apparatus according to claim 3 of the present invention is the dehumidifying air conditioner according to claim 1 or 2, wherein the heating means is an evaporator built in a refrigeration apparatus disposed in the target room, A fluid circulation circuit that circulates the working fluid together with a compressor that compresses the working fluid is configured, and the regeneration air is heated by condensing the working fluid compressed by the compressor.

  Moreover, the dehumidification air-conditioning apparatus which concerns on Claim 4 of this invention is the upstream of the said 2nd heat exchanger, The said heating means is arrange | positioned in any one of Claims 1-3 mentioned above. It is characterized by.

  The dehumidifying air conditioner according to claim 5 of the present invention is the dehumidifying air conditioner according to any one of claims 1 to 4 described above, wherein the heating means is disposed in a downstream area of the compressor constituting the heat pump unit. And the regenerative air that has passed around the compressor is heated.

  The dehumidifying air-conditioning apparatus according to claim 6 of the present invention is the dehumidifying air conditioner according to any one of claims 3 to 5, wherein the fluid circulation circuit includes a path connected to an inlet side of the heating unit and the heating unit. A bypass path disposed in such a manner as to communicate with a path connected to the outlet side, and a valve disposed in the bypass path and configured to adjust a flow rate of the working fluid passing through the bypass path. And a temperature detection means for detecting the temperature of the regenerated air immediately before passing through the moisture release region, and a control means for controlling the opening of the valve according to the detection result by the temperature detection means. To do.

  The dehumidifying air conditioner according to claim 7 of the present invention is the dehumidifying air conditioner according to claim 6, wherein the control means is configured such that the temperature detected by the temperature detecting means falls below a preset lower limit value of the target temperature. Decreases the opening of the valve, while increasing the opening of the valve when the detected temperature exceeds the upper limit of the target temperature.

  The dehumidifying air-conditioning apparatus according to claim 8 of the present invention is the dehumidifying air conditioner according to claim 7, wherein the control means is in a state where the valve is fully closed and the temperature detected by the temperature detecting means is the target. When the temperature falls below the lower limit value, the blast volume of the regeneration air is decreased, while the valve is fully closed and the temperature detected by the temperature detection means exceeds the upper limit value of the target temperature. In this case, the amount of the regenerated air blown is increased.

  According to the dehumidifying air-conditioning apparatus of the present invention, the heating means heats the regenerated air that passes toward the moisture release region separately from the heat pump unit, so that even if the outside air temperature is low during the dehumidifying operation, the regeneration is performed. The air can be sufficiently heated, so that the regenerated air passes through the moisture release region, so that the moisture adsorbent can sufficiently release the moisture. Accordingly, there is an effect that it is possible to suppress a decrease in the dehumidifying ability of the processing air by sufficiently heating the regenerated air during the dehumidifying operation.

  Exemplary embodiments of a dehumidifying air conditioner according to the present invention will be described below in detail with reference to the accompanying drawings. In the present embodiment, the target room of the dehumidifying air conditioner will be described as being a store such as a supermarket, a convenience store, a shopping center, or the like.

<Embodiment 1>
FIG. 1 is a schematic diagram schematically showing the configuration of the dehumidifying air-conditioning apparatus according to Embodiment 1 of the present invention. The dehumidifying air-conditioning apparatus 10 illustrated here performs ventilation, dehumidification, and air conditioning by introducing outside air into the store 1. A showcase (freezer / refrigerator) 2 is provided inside the target store 1.

  The showcase 2 is for cooling goods etc. displayed inside. The showcase 2 includes an evaporator 3. Although details will be described later, the evaporator 3 cools the products displayed inside the showcase 2 by evaporating the working fluid passing through the inside. In practice, a plurality of showcases 2 are generally provided inside the store 1, but in the first embodiment, the showcase 2 is placed inside the store 1 for convenience of explanation. Only one example will be described.

  The dehumidifying air conditioner 10 applied to the store 1 includes a dehumidifying rotor 20, an air supply unit 30, an air discharge unit 40, a heat pump unit 50, and a condenser (heating means) 60.

  The dehumidifying rotor 20 is provided with a moisture adsorbing body 21 such as paper or zeolite that is formed in a short-axis cylindrical shape. The moisture adsorbing body 21 rotates around its central axis by driving a motor (not shown). More specifically, the moisture adsorbing body 21 rotates in such a manner as to alternately pass between the moisture adsorbing region 31 and the moisture releasing region 41 that are partitioned from each other and that constitute the air flow path. That is, the dehumidification rotor 20 circulates and moves the moisture adsorbent 21 between the partitioned moisture adsorption region 31 and the moisture release region 41. Thus, when the moisture adsorbing body 21 rotates, the portion located in the moisture adsorption region 31 moves to the moisture release region 41 and then moves to the moisture adsorption region 31 again in order.

  The air supply unit 30 is for supplying the introduced processing air (outside air) to the inside of the store 1, and has an air supply path 300.

  The air supply path 300 is provided inside the housing constituting the dehumidifying air conditioner 10, and is a path for supplying the processing air taken in from the processing air inlet 301 into the store 1 through the processing air outlet 302. The water adsorption region 31 and the supply fan 32 are provided in this order from the processing air intake 301 side.

  As will be described in detail later, the moisture adsorption region 31 is a region for allowing the moisture adsorbent 21 to adsorb moisture of the processing air that passes when the dehumidifying air conditioner 10 performs a dehumidifying operation. As a result, the process air passing therethrough is dehumidified in the moisture adsorption region 31.

  The supply fan 32 serves as a blast source for introducing processing air through the processing air inlet 301 and sending (supplying) processing air into the store 1. Therefore, the processing air that has passed through the air supply path 300 is supplied into the store 1 through the processing air discharge port 302 by driving the supply fan 32.

  The air discharge unit 40 has an air discharge path 400. The air discharge path 400 is provided inside the housing constituting the dehumidifying air conditioner 10, and is arranged in parallel with the air supply path 300 in a manner partitioned from the air supply path 300. The air discharge path 400 is a path for discharging the regeneration air (outside air) taken from the regeneration air intake port 401 to the outside through the regeneration air discharge port 402, and the moisture discharge region 41 and the discharge fan 42 are connected to the regeneration air intake. They are provided in order from the entrance 401 side.

  Although the details will be described later, the moisture release area 41 is an area for allowing the moisture adsorbent 21 to release moisture when the dehumidifying air conditioner 10 performs a dehumidifying operation.

  The discharge fan 42 serves as a blast source for introducing the regeneration air through the regeneration air intake port 401 and sending out (releases) the regeneration air to the outside. Therefore, when the discharge fan 42 is driven, the regenerated air that has passed through the air discharge path 400 is discharged to the outside through the regenerative air discharge port 402.

  The heat pump unit 50 includes a refrigerant circulation circuit 50a. The refrigerant circulation circuit 50a is configured by sequentially connecting a refrigerant compressor 51, a first heat exchanger 52, and a second heat exchanger 53 with refrigerant pipes, and the refrigerant is enclosed inside. is there. Here, various refrigerants can be used. For example, chlorofluorocarbon, hydrochlorofluorocarbon, hydrofluorocarbon, fluorocarbon, a mixed solvent thereof, methyl bromide, ammonia, carbon dioxide, water, or the like can be used.

  The refrigerant compressor 51 is disposed in the air discharge path 400 in the vicinity of the regeneration air intake 401, more specifically, in the downstream area in the immediate vicinity of the regeneration air intake 401. The refrigerant compressor 51 compresses the refrigerant to a high temperature and high pressure state. The refrigerant compressor 51 is connected to each of a refrigerant pipe connected to the first heat exchanger 52 and a refrigerant pipe connected to the second heat exchanger 53 via the valve body 54. The valve body 54 adjusts the direction of the refrigerant flowing through the refrigerant circulation circuit 50a according to the operation (dehumidification operation and heating operation) of the dehumidifying air conditioner 10. More specifically, when the dehumidifying air conditioner 10 performs the dehumidifying operation, the valve body 54 is adjusted so as to send the refrigerant compressed by the refrigerant compressor 51 toward the second heat exchanger 53. When the dehumidifying air conditioner 10 performs the heating operation (in the direction of the solid arrow in the figure), the refrigerant compressed by the refrigerant compressor 51 is adjusted to be sent out toward the first heat exchanger 52. (Dotted arrow direction in the figure).

  The first heat exchanger 52 is disposed upstream of the moisture adsorption region 31 in the air supply path 300. The first heat exchanger 52 exchanges heat between the refrigerant and the ambient air, that is, the processing air that passes toward the moisture adsorption region 31. More specifically, the first heat exchanger 52 acts as an evaporator when the dehumidifying air conditioner 10 performs a dehumidifying operation, and acts as a condenser when the dehumidifying air conditioner 10 performs a heating operation. Is. In other words, during the dehumidifying operation, the refrigerant evaporates and cools the processing air that passes through the surroundings, in other words, absorbs heat in a mode that draws heat from the processing air, while during the heating operation, the refrigerant is condensed to pass through the surroundings. It is for heating.

  The second heat exchanger 53 is disposed in the upstream area of the moisture discharge area 41 in the air discharge path 400, that is, in a predetermined area between the refrigerant compressor 51 and the moisture discharge area 41. The second heat exchanger 53 exchanges heat between the refrigerant and ambient air, that is, regeneration air that passes toward the moisture release region 41. More specifically, the second heat exchanger 53 acts as a condenser when the dehumidifying air conditioner 10 performs a dehumidifying operation, and acts as an evaporator when the dehumidifying air conditioner 10 performs a heating operation. Is. That is, in the dehumidifying operation, the refrigerant is condensed to heat the regenerative air passing through the surroundings, while in the heating operation, the refrigerant is evaporated to cool the regenerating air passing through the surroundings, in other words, the heat is generated from the regenerated air. It absorbs heat.

  As described above, during the dehumidifying operation, the heat pump unit 50 draws up heat from the processing air (heat absorption) through the first heat exchanger 52 and regenerates air with the heat absorbed by the first heat exchanger 52 through the second heat exchanger 53. In the heating operation, heat is drawn from the regenerated air through the second heat exchanger 53 (heat is absorbed), and the processing air is heated by the heat absorbed by the second heat exchanger 53 through the first heat exchanger 52. Is.

  The condenser 60 is disposed in an upstream area of the second heat exchanger 53 in the air discharge path 400, that is, in a predetermined area between the refrigerant compressor 51 and the second heat exchanger 53. The condenser 60 constitutes a fluid circulation circuit L1 together with the evaporator 3 incorporated in the showcase 2 and the fluid compressor 4.

  Here, the fluid circulation circuit L1 is configured by sequentially connecting the fluid compressor 4, the condenser 60, the expansion mechanism 5, and the evaporator 3 with fluid pipes, and the working fluid is enclosed therein. It will be. Here, various working fluids can be used. For example, chlorofluorocarbon, hydrochlorofluorocarbon, hydrofluorocarbon, fluorocarbon, and a mixture thereof can be used similarly to the refrigerant sealed in the refrigerant circulation circuit 50a of the heat pump unit 50. A solvent, methyl bromide, ammonia, carbon dioxide, water or the like can be used.

  The fluid compressor 4 compresses the supplied working fluid into a high temperature and high pressure state.

  The condenser 60 condenses the working fluid supplied from the fluid compressor 4, that is, the working fluid compressed to a high temperature and high pressure state by the fluid compressor 4. As a result, the regeneration air passing around the condenser 60 is heated by condensing the working fluid. That is, the condenser 60 heats the regenerated air that passes toward the second heat exchanger 53.

  The expansion mechanism 5 adiabatically expands the working fluid supplied from the condenser 60, that is, the working fluid condensed by the condenser 60, that is, depressurizes the working fluid into a low-temperature and low-pressure state.

  The evaporator 3 evaporates the refrigerant adiabatically expanded to a low temperature and low pressure state by the expansion mechanism 5. Thereby, the goods displayed inside the showcase 2 are deprived of heat and cooled.

  As described above, in the fluid circulation circuit L1, the working fluid is constantly circulated in order to cool the products inside the showcase 2, and thus the condenser 60 is involved in the dehumidifying operation and the heating operation of the dehumidifying air conditioner 10. The regeneration air passing through the surroundings is heated.

  In the dehumidifying air conditioner 10 having the above configuration, the dehumidifying operation and the heating operation are performed as follows. In the following description, in the fluid circulation circuit L1, it is assumed that the fluid compressor 4 is driven and the working fluid is constantly circulated.

  First, the case where the dehumidifying operation is performed will be described. When the dehumidifying operation command is given, each of the motor, the refrigerant compressor 51, the supply fan 32, and the discharge fan 42 is driven, and the valve body 54 constituting the heat pump unit 50 is compressed by the refrigerant compressor 51. It adjusts so that it may send out toward the 2nd heat exchanger 53.

  Thus, the moisture adsorber 21 is rotated by driving the motor. In the heat pump unit 50, the refrigerant compressed by the refrigerant compressor 51 (high-temperature and high-pressure) is adjusted so that the refrigerant compressed by the refrigerant compressor 51 is sent out toward the second heat exchanger 53. Of the refrigerant) is sent to the second heat exchanger 53, exchanged heat with the regenerated air in the second heat exchanger 53, then sent to the first heat exchanger 52, and processed air in the first heat exchanger 52. The refrigerant circulation circuit 50a is circulated in such a manner as to return to the refrigerant compressor 51 after heat exchange with the refrigerant. That is, the first heat exchanger 52 acts as an evaporator, while the second heat exchanger 53 acts as a condenser.

  By driving the supply fan 32, the processing air is taken into the air supply path 300 through the processing air inlet 301, and the introduced processing air reaches the first heat exchanger 52. The processing air that has reached the first heat exchanger 52 is cooled by the evaporation of the refrigerant passing through the inside of the first heat exchanger 52 and reaches the moisture adsorption region 31. In the moisture adsorption region 31, moisture contained in the processing air is adsorbed by a corresponding portion of the moisture adsorbing body 21, and the humidity of the processing air is lowered. That is, the processing air is dehumidified. Further, the moisture adsorbed on the portion of the moisture adsorbing body 21 corresponding to the moisture adsorbing area 31 moves from the moisture adsorbing area 31 to the moisture releasing area 41 as the moisture adsorbing body 21 rotates. The processing air dehumidified in the moisture adsorption region 31 flows toward the downstream region by driving the supply fan 32, and is then supplied into the store 1 through the processing air discharge port 302.

  On the other hand, when the discharge fan 42 is driven, the regeneration air is taken in through the regeneration air intake 401, and the introduced regeneration air passes around the refrigerant compressor 51. The regenerated air that passes around the refrigerant compressor 51 is slightly heated by drive heat generated from the refrigerant compressor 51 (actually heat generated from a motor or the like) and reaches the condenser 60. The regeneration air that has reached the condenser 60 is heated by the condensation of the working fluid that flows inside the condenser 60, and reaches the second heat exchanger 53. The regenerative air that has reached the second heat exchanger 53 is further heated by the refrigerant passing through the second heat exchanger 53 condensing, and reaches a moisture release region 41. In the moisture release region 41, the regeneration air heated by the condenser 60 and the second heat exchanger 53 passes, so that moisture is released from the corresponding part of the moisture adsorbent 21, and the humidity of the regeneration air increases. . Thereafter, the regeneration air that has passed through the moisture release region 41 is discharged to the outside through the regeneration air discharge port 402 by driving the discharge fan 42.

  The portion of the moisture adsorbing body 21 corresponding to the moisture releasing region 41 is dried by releasing moisture, and the temperature rises. The corresponding portion of the dried moisture adsorbent 21 is moved from the moisture release area 41 to the moisture adsorption area 31 with the rotation of the moisture adsorbent 21, and the above operation is repeated, so that the dehumidifying operation is performed. Is done.

  As described above, in the dehumidifying air conditioner 10, during the dehumidifying operation, the processing air introduced from the outside is cooled by the first heat exchanger 52, and the cooled processing air is passed through the moisture adsorption region 31, so While the dehumidified treated air is supplied to the interior of the store 1, the regenerated air introduced is heated by the condenser 60 and further heated by the second heat exchanger 53 to a high temperature. By passing the regenerated air through the moisture release region 41, the moisture adsorbent 21 is caused to release moisture. That is, heat is drawn up (absorbed) from the process air through the first heat exchanger 52, and the regenerated air is heated by the heat absorbed by the first heat exchanger 52 through the second heat exchanger 53.

  Next, a case where the heating operation is performed will be described. While the heating operation command is given and the driving of the motor is stopped, each of the refrigerant compressor 51, the supply fan 32, and the discharge fan 42 is driven, and the valve body 54 constituting the heat pump unit 50 is connected to the refrigerant compressor 51. The refrigerant compressed in step (b) is adjusted so as to be sent out toward the first heat exchanger 52.

  Thus, when the driving of the motor is stopped, the rotation of the moisture adsorbing body 21 is stopped. Accordingly, moisture adsorption in the moisture adsorption region 31 and moisture release in the moisture release region 41 are hardly performed. As a result, the processing air simply passes through the moisture adsorption region 31, and the regeneration air simply passes through the moisture release region 41.

  In the heat pump unit 50, the refrigerant compressed by the refrigerant compressor 51 (high-temperature and high-pressure) is adjusted so that the refrigerant compressed by the refrigerant compressor 51 is sent out toward the first heat exchanger 52. Of the refrigerant) is sent to the first heat exchanger 52, exchanges heat with the processing air in the first heat exchanger 52, and then sent to the second heat exchanger 53, and is regenerated air in the second heat exchanger 53. The refrigerant circulation circuit 50a is circulated in such a manner as to return to the refrigerant compressor 51 after heat exchange with the refrigerant. That is, the first heat exchanger 52 acts as a condenser, while the second heat exchanger 53 acts as an evaporator.

  By driving the supply fan 32, the processing air is taken into the air supply path 300 through the processing air inlet 301, and the introduced processing air reaches the first heat exchanger 52. The processing air that has reached the first heat exchanger 52 is heated by condensation of the refrigerant passing through the inside of the first heat exchanger 52, passes through the moisture adsorption region 31, and then passes through the processing air discharge port 302 to the store 1. Supplied inside.

  On the other hand, when the discharge fan 42 is driven, the regeneration air is taken in through the regeneration air intake 401, and the introduced regeneration air passes around the refrigerant compressor 51. The regenerated air that passes around the refrigerant compressor 51 is slightly heated by drive heat generated from the refrigerant compressor 51 (actually heat generated from a motor or the like) and reaches the condenser 60. The regeneration air that has reached the condenser 60 is heated by the condensation of the working fluid that flows inside the condenser 60, and reaches the second heat exchanger 53. The regenerated air that has reached the second heat exchanger 53 is cooled by the evaporation of the refrigerant passing through the second heat exchanger 53, that is, the heat is absorbed by the second heat exchanger 53, and the moisture release region 41. And then discharged to the outside through the regeneration air discharge port 402.

  As described above, in the dehumidifying air conditioner 10, during the heating operation, the processing air introduced from the outside is heated by the first heat exchanger 52 and the heated processing air is supplied to the inside of the store 1, while the introduced regeneration air is supplied. Is heated by the condenser 60 and absorbed by the second heat exchanger 53. That is, heat is drawn up (absorbed) from the regenerated air through the second heat exchanger 53, and the process air is heated by the heat absorbed by the second heat exchanger 53 through the first heat exchanger 52.

  In the dehumidifying air conditioner 10, the condenser 60 heats the regenerative air that passes toward the moisture release region 41 separately from the heat pump unit 50 (second heat exchanger 53). Even if it is low, regeneration air can fully be heated. That is, even if the amount of heat absorbed from the processing air through the first heat exchanger 52 is small, the regeneration air can be sufficiently heated regardless of this. As a result, the regeneration air passes through the moisture release region 41, so that the moisture adsorbent 21 can sufficiently release the moisture.

  Therefore, according to the dehumidifying air-conditioning apparatus 10 in Embodiment 1 of the present invention, it is possible to suppress a reduction in the dehumidifying capacity of the processing air by sufficiently heating the regenerated air during the dehumidifying operation.

  Moreover, according to the dehumidifying air conditioner 10 in Embodiment 1 of this invention, the condenser 60 is arrange | positioned in the upstream area of the 2nd heat exchanger 53 which comprises the heat pump unit 50, and this 2nd heat exchange. Since the regenerative air passing toward the cooler 53 is heated, it is possible to avoid that the moisture of the regenerative air freezes on the heat transfer surface of the second heat exchanger 53 and becomes frosted during the heating operation. In addition, the amount of heat absorbed by the second heat exchanger 53 can be secured, so that the processing air can be heated satisfactorily through the first heat exchanger 52, resulting in a decrease in the heating capacity of the processing air. Can be suppressed. Even if the moisture of the regenerated air is frosted on the heat transfer surface of the second heat exchanger 53, the operation of the heat pump unit 50 is stopped and the regenerated air heated by the condenser 60 is passed to defrost. It becomes possible.

  Furthermore, according to the dehumidifying air-conditioning apparatus 10 according to Embodiment 1 of the present invention, the condenser 60 includes the evaporator 3 built in the showcase 2 disposed in the store 1 and the fluid that compresses the working fluid. Since the fluid circulation circuit L1 is configured together with the compressor 4 and the regenerated air is heated by condensing the working fluid compressed by the fluid compressor 4, the exhaust heat of the showcase 2 can be used effectively, and a new Since no heat source is required, the cost required for operation can be reduced.

  Furthermore, according to the dehumidifying air conditioner 10, the refrigerant compressor 51 constituting the heat pump unit 50 is disposed in the vicinity of the regenerative air intake 401, more specifically, in the downstream area immediately adjacent to the regenerative air intake 401. Further, the regeneration air can be further heated by the driving heat generated from the refrigerant compressor 51, and in combination with the action and effect of the condenser 60, the regeneration air is sufficiently heated during the dehumidifying operation to A decrease in the dehumidifying capacity can be suppressed, and a decrease in the heating capacity of the processing air can be suppressed during the heating operation.

<Embodiment 2>
FIG. 2 is a schematic diagram schematically showing the configuration of the dehumidifying air-conditioning apparatus according to Embodiment 2 of the present invention. In addition, the same code | symbol is attached | subjected and demonstrated to what has the structure same as Embodiment 1 mentioned above. The dehumidifying air conditioner 11 exemplified here performs ventilation, dehumidification, and air conditioning by introducing outside air into the store 1. A showcase (freezer / refrigerator) 2 is provided inside the target store 1.

  The showcase 2 is for cooling goods etc. displayed inside. The showcase 2 includes an evaporator 3. Although details will be described later, the evaporator 3 cools the products displayed inside the showcase 2 by evaporating the working fluid passing through the inside. In practice, a plurality of showcases 2 are generally provided inside the store 1, but in the second embodiment, the showcase 2 is placed inside the store 1 for convenience of explanation. Only one example will be described.

  The dehumidifying air conditioner 11 applied to the store 1 includes a dehumidifying rotor 20, an air supply unit 30, an air release unit 40, a heat pump unit 50, and a condenser (heating means) 60.

  The dehumidifying rotor 20 is provided with a moisture adsorbing body 21 such as paper or zeolite that is formed in a short-axis cylindrical shape. The moisture adsorber 21 rotates around its central axis by driving a motor M (see FIG. 3). More specifically, the moisture adsorbing body 21 rotates in such a manner as to alternately pass between the moisture adsorbing region 31 and the moisture releasing region 41 that are partitioned from each other and that constitute the air flow path. That is, the dehumidification rotor 20 circulates and moves the moisture adsorbent 21 between the partitioned moisture adsorption region 31 and the moisture release region 41. Thus, when the moisture adsorbing body 21 rotates, the portion located in the moisture adsorption region 31 moves to the moisture release region 41 and then moves to the moisture adsorption region 31 again in order.

  The air supply unit 30 is for supplying the introduced processing air (outside air) to the inside of the store 1, and has an air supply path 300.

  The air supply path 300 is provided inside the housing constituting the dehumidifying air conditioner 11, and is a path for supplying the processing air taken in from the processing air inlet 301 into the store 1 through the processing air outlet 302. The water adsorption region 31 and the supply fan 32 are provided in this order from the processing air intake 301 side.

  Although the details will be described later, the moisture adsorption region 31 is a region for allowing the moisture adsorbent 21 to adsorb moisture of the processing air that passes when the dehumidifying air conditioner 11 performs a dehumidifying operation. As a result, the process air passing therethrough is dehumidified in the moisture adsorption region 31.

  The supply fan 32 serves as a blast source for introducing processing air through the processing air inlet 301 and sending (supplying) processing air into the store 1. Therefore, the processing air that has passed through the air supply path 300 is supplied into the store 1 through the processing air discharge port 302 by driving the supply fan 32.

  The air discharge unit 40 has an air discharge path 400. The air discharge path 400 is provided inside the housing constituting the dehumidifying air conditioner 11, and is arranged in parallel with the air supply path 300 in a manner partitioned from the air supply path 300. The air discharge path 400 is a path for discharging the regeneration air (outside air) taken from the regeneration air intake port 401 to the outside through the regeneration air discharge port 402, and the moisture discharge region 41 and the discharge fan 42 are connected to the regeneration air intake. They are provided in order from the entrance 401 side.

  Although the details will be described later, the moisture release area 41 is an area for causing the moisture adsorbent 21 to release moisture when the dehumidifying air conditioner 11 performs a dehumidifying operation.

  The discharge fan 42 serves as a blast source for introducing the regeneration air through the regeneration air intake port 401 and sending out (releases) the regeneration air to the outside. Therefore, when the discharge fan 42 is driven, the regenerated air that has passed through the air discharge path 400 is discharged to the outside through the regenerative air discharge port 402.

  In the air release unit 40, the regeneration temperature sensor S is provided at a predetermined location between the second heat exchanger 53 and the moisture release region 41 in the air release path 400. The regeneration temperature sensor S is temperature detection means for detecting the temperature of the regeneration air that has passed through the second heat exchanger 53, that is, the temperature of the regeneration air immediately before passing through the moisture release region 41.

  The heat pump unit 50 includes a refrigerant circulation circuit 50a. The refrigerant circulation circuit 50a is configured by sequentially connecting a refrigerant compressor 51, a first heat exchanger 52, and a second heat exchanger 53 with refrigerant pipes, and the refrigerant is enclosed inside. is there. Here, various refrigerants can be used. For example, chlorofluorocarbon, hydrochlorofluorocarbon, hydrofluorocarbon, fluorocarbon, a mixed solvent thereof, methyl bromide, ammonia, carbon dioxide, water, or the like can be used.

  The refrigerant compressor 51 is disposed in the air discharge path 400 in the vicinity of the regeneration air intake 401, more specifically, in the downstream area in the immediate vicinity of the regeneration air intake 401. The refrigerant compressor 51 compresses the refrigerant to a high temperature and high pressure state. The refrigerant compressor 51 is connected to each of a refrigerant pipe connected to the first heat exchanger 52 and a refrigerant pipe connected to the second heat exchanger 53 via the valve body 54. The valve body 54 adjusts the direction of the refrigerant flowing through the refrigerant circulation circuit 50a according to the operation (dehumidification operation and heating operation) of the dehumidifying air conditioner 11. More specifically, when the dehumidifying air conditioner 11 performs the dehumidifying operation, the valve body 54 is adjusted so as to send the refrigerant compressed by the refrigerant compressor 51 toward the second heat exchanger 53. When the dehumidifying air conditioner 11 performs the heating operation (in the direction of the solid arrow in the figure), the refrigerant compressed by the refrigerant compressor 51 is adjusted to be sent out toward the first heat exchanger 52. (Dotted arrow direction in the figure).

  The first heat exchanger 52 is disposed upstream of the moisture adsorption region 31 in the air supply path 300. The first heat exchanger 52 exchanges heat between the refrigerant and the ambient air, that is, the processing air that passes toward the moisture adsorption region 31. More specifically, the first heat exchanger 52 acts as an evaporator when the dehumidifying air conditioner 11 performs a dehumidifying operation, and acts as a condenser when the dehumidifying air conditioner 11 performs a heating operation. Is. In other words, when a dehumidifying operation command is given, the refrigerant is evaporated to cool the processing air passing through the surroundings, in other words, when heat is absorbed in a manner that generates heat from the processing air, while a heating operation command is given In this method, the processing air passing through the surroundings by condensing the refrigerant is heated.

  The second heat exchanger 53 is disposed in the upstream area of the moisture discharge area 41 in the air discharge path 400, that is, in a predetermined area between the refrigerant compressor 51 and the moisture discharge area 41. The second heat exchanger 53 exchanges heat between the refrigerant and ambient air, that is, regeneration air that passes toward the moisture release region 41. More specifically, the second heat exchanger 53 acts as a condenser when the dehumidifying air conditioner 11 performs a dehumidifying operation, and acts as an evaporator when the dehumidifying air conditioner 11 performs a heating operation. Is. That is, when a dehumidifying operation command is given, the refrigerant is condensed and heated by the regenerated air passing through the surroundings, whereas when a heating operation command is given, the refrigerant is evaporated and the regenerated air passing through the surroundings is given through It cools, in other words, absorbs heat in a manner that draws heat from the regeneration air.

  As described above, when a dehumidifying operation command is given, the heat pump unit 50 draws up heat from the processing air through the first heat exchanger 52 (absorbs heat), and passes through the first heat exchanger 52 through the second heat exchanger 53. When the regenerative air is heated with the heat absorbed in the heat, while a heating operation command is given, heat is drawn from the regenerative air through the second heat exchanger 53 (heat absorption), and the second heat exchanger 52 receives the second heat through the first heat exchanger 52. The processing air is heated by the heat absorbed by the heat exchanger 53.

  The condenser 60 is disposed in an upstream area of the second heat exchanger 53 in the air discharge path 400, that is, in a predetermined area between the refrigerant compressor 51 and the second heat exchanger 53. The condenser 60 constitutes a fluid circulation circuit L2 together with the evaporator 3 incorporated in the showcase 2 and the fluid compressor 4.

  The fluid circulation circuit L2 is configured by connecting the fluid compressor 4, the condenser 60, the expansion mechanism 5, and the evaporator 3 with fluid pipes, and the working fluid is sealed inside. . More specifically, the fluid compressor 4, the condenser 60, the expansion mechanism 5, and the evaporator 3 are sequentially connected by the fluid piping, and the fluid piping connected to the inlet side of the condenser 60 and the condensation are connected. A bypass pipe (bypass path) 61 is arranged in such a manner as to communicate with a fluid pipe connected to the outlet side of the vessel 60, and a flow rate adjusting valve (valve) 62 is arranged in the bypass pipe 61. is there. The flow rate adjusting valve 62 is for controlling the flow rate of the entire working fluid in the fluid circulation circuit L2 by adjusting the flow rate of the working fluid passing through the bypass pipe. Moreover, the code | symbol 6 in a figure is an internal heat exchanger which heat-exchanges the working fluid to pass with external air.

  Various working fluids can be used as the working fluid sealed in the fluid circulation circuit L2, and, for example, chlorofluorocarbon, hydrochlorofluorocarbon, hydrostatic fluid can be used in the same manner as the refrigerant sealed in the refrigerant circulation circuit 50a of the heat pump unit 50. Fluorocarbon, fluorocarbon, a mixed solvent thereof, methyl bromide, ammonia, carbon dioxide, water and the like can be used.

  The fluid compressor 4 compresses the supplied working fluid into a high temperature and high pressure state. The condenser 60 condenses the working fluid supplied from the fluid compressor 4, that is, the working fluid compressed to a high temperature and high pressure state by the fluid compressor 4. As a result, the regeneration air passing around the condenser 60 is heated by condensing the working fluid. That is, the condenser 60 heats the regenerated air that passes toward the second heat exchanger 53. The expansion mechanism 5 adiabatically expands the working fluid supplied from the condenser 60, that is, the working fluid condensed by the condenser 60, that is, depressurizes the working fluid into a low-temperature and low-pressure state. The evaporator 3 evaporates the refrigerant adiabatically expanded to a low temperature and low pressure state by the expansion mechanism 5. Thereby, the goods displayed inside the showcase 2 are deprived of heat and cooled.

  As described above, in the fluid circulation circuit L2, the working fluid is constantly circulated in order to cool the products in the showcase 2, and thus the condenser 60 is involved in the dehumidifying operation and the heating operation of the dehumidifying air conditioner 11. The regeneration air passing through the surroundings is heated.

  FIG. 3 is a block diagram schematically showing a control system of the dehumidifying air-conditioning apparatus according to Embodiment 2 of the present invention shown in FIG. As illustrated in FIG. 3, the dehumidifying air conditioner 11 includes a controller 70.

  The controller 70 is a control means that incorporates a memory (not shown) and controls the operation of the dehumidifying air conditioner 11 in an integrated manner according to data and programs stored in the memory. The controller 70 includes various processing units, but includes a target temperature setting storage unit 71, a valve drive processing unit 72, and a fan drive processing unit 73 as particularly relevant to the present invention.

  The target temperature setting storage unit 71 sets the target temperature of the regeneration air in advance and stores it. In the second embodiment, an upper limit value and a lower limit value are set as the target temperatures of the regeneration air. The valve drive processing unit 72 performs drive processing for opening or closing the flow rate adjusting valve 62 based on the comparison result between the detection result of the regeneration temperature sensor S and the target temperature of the regeneration air. The fan drive processing unit 73 performs drive processing of the supply fan 32 and the discharge fan 42, and in particular, the rotation of the discharge fan 42 based on the comparison result between the detection result of the regeneration temperature sensor S and the target temperature of the regeneration air. A drive process for increasing or decreasing the number is performed.

  In the dehumidifying air conditioner 11 having the above configuration, the dehumidifying operation and the heating operation are performed as follows. In the following description, in the fluid circulation circuit L2, it is assumed that the fluid compressor 4 is driven and the working fluid is constantly circulated.

  First, the case where the dehumidifying operation is performed will be described. As a premise of this description, it is assumed that the valve body 54 constituting the heat pump unit 50 is adjusted so that the refrigerant compressed by the refrigerant compressor 51 is sent out toward the second heat exchanger 53.

  In the controller 70 to which the dehumidifying operation command is given, each of the motor M, the refrigerant compressor 51, the supply fan 32, and the discharge fan 42 gives a drive command to drive.

  When the motor M is driven, the moisture adsorbing body 21 rotates. In the heat pump unit 50, the refrigerant compressed by the refrigerant compressor 51 (high-temperature and high-pressure) is adjusted so that the refrigerant compressed by the refrigerant compressor 51 is sent out toward the second heat exchanger 53. Of the refrigerant) is sent to the second heat exchanger 53, exchanged heat with the regenerated air in the second heat exchanger 53, then sent to the first heat exchanger 52, and processed air in the first heat exchanger 52. The refrigerant circulation circuit 50a is circulated in such a manner as to return to the refrigerant compressor 51 after heat exchange with the refrigerant. That is, the first heat exchanger 52 acts as an evaporator, while the second heat exchanger 53 acts as a condenser.

  By driving the supply fan 32, the processing air is taken into the air supply path 300 through the processing air inlet 301, and the introduced processing air reaches the first heat exchanger 52. The processing air that has reached the first heat exchanger 52 is cooled by the evaporation of the refrigerant passing through the inside of the first heat exchanger 52 and reaches the moisture adsorption region 31. In the moisture adsorption region 31, moisture contained in the processing air is adsorbed by a corresponding portion of the moisture adsorbing body 21, and the humidity of the processing air is lowered. That is, the processing air is dehumidified. Further, the moisture adsorbed on the portion of the moisture adsorbing body 21 corresponding to the moisture adsorbing area 31 moves from the moisture adsorbing area 31 to the moisture releasing area 41 as the moisture adsorbing body 21 rotates. The processing air dehumidified in the moisture adsorption region 31 flows toward the downstream region by driving the supply fan 32, and is then supplied into the store 1 through the processing air discharge port 302.

  On the other hand, when the discharge fan 42 is driven, the regeneration air is taken in through the regeneration air intake 401, and the introduced regeneration air passes around the refrigerant compressor 51. The regenerated air that passes around the refrigerant compressor 51 is slightly heated by drive heat generated from the refrigerant compressor 51 (actually heat generated from a motor or the like) and reaches the condenser 60. The regeneration air that has reached the condenser 60 is heated by the condensation of the working fluid that flows inside the condenser 60, and reaches the second heat exchanger 53. The regenerative air that has reached the second heat exchanger 53 is further heated by the refrigerant passing through the second heat exchanger 53 condensing, and reaches a moisture release region 41. In the moisture release region 41, the regeneration air heated by the condenser 60 and the second heat exchanger 53 passes, so that moisture is released from the corresponding part of the moisture adsorbent 21, and the humidity of the regeneration air increases. . Thereafter, the regeneration air that has passed through the moisture release region 41 is discharged to the outside through the regeneration air discharge port 402 by driving the discharge fan 42.

  The portion of the moisture adsorbing body 21 corresponding to the moisture releasing region 41 is dried by releasing moisture, and the temperature rises. The corresponding portion of the dried moisture adsorbent 21 is moved from the moisture release area 41 to the moisture adsorption area 31 with the rotation of the moisture adsorbent 21, and the above operation is repeated, so that the dehumidifying operation is performed. Is done.

  Thus, in the dehumidifying air conditioner 11, when the dehumidifying operation command is given, the processing air introduced from the outside is cooled by the first heat exchanger 52, and the cooled processing air is passed through the moisture adsorption region 31. The moisture adsorbing body 21 adsorbs moisture to dehumidify it and supplies the dehumidified processing air to the inside of the store 1, while the introduced regenerative air is heated by the condenser 60 and further by the second heat exchanger 53. By heating to a high temperature and allowing the regeneration air to pass through the moisture release region 41, the moisture adsorbent 21 is released. That is, heat is drawn up (absorbed) from the process air through the first heat exchanger 52, and the regenerated air is heated by the heat absorbed by the first heat exchanger 52 through the second heat exchanger 53.

  Next, a case where the heating operation is performed will be described. As a premise of this explanation, the valve body 54 constituting the heat pump unit 50 is adjusted so that the refrigerant compressed by the refrigerant compressor 51 is sent out toward the first heat exchanger 52, and the motor M, each of the supply fan 32 and the discharge fan 42 is driven.

  The controller 70 given the heating operation command stops the driving of the motor M. Thus, when the driving of the motor M is stopped, the rotation of the moisture adsorbing body 21 is stopped. Accordingly, moisture adsorption in the moisture adsorption region 31 and moisture release in the moisture release region 41 are hardly performed. As a result, the processing air simply passes through the moisture adsorption region 31, and the regeneration air simply passes through the moisture release region 41.

  In the heat pump unit 50, the refrigerant compressed by the refrigerant compressor 51 (high-temperature and high-pressure) is adjusted so that the refrigerant compressed by the refrigerant compressor 51 is sent out toward the first heat exchanger 52. Of the refrigerant) is sent to the first heat exchanger 52, exchanges heat with the processing air in the first heat exchanger 52, and then sent to the second heat exchanger 53, and is regenerated air in the second heat exchanger 53. The refrigerant circulation circuit 50a is circulated in such a manner as to return to the refrigerant compressor 51 after heat exchange with the refrigerant. That is, the first heat exchanger 52 acts as a condenser, while the second heat exchanger 53 acts as an evaporator.

  By driving the supply fan 32, the processing air is taken into the air supply path 300 through the processing air inlet 301, and the introduced processing air reaches the first heat exchanger 52. The processing air that has reached the first heat exchanger 52 is heated by condensation of the refrigerant passing through the inside of the first heat exchanger 52, passes through the moisture adsorption region 31, and then passes through the processing air discharge port 302 to the store 1. Supplied inside.

  On the other hand, when the discharge fan 42 is driven, the regeneration air is taken in through the regeneration air intake 401, and the introduced regeneration air passes around the refrigerant compressor 51. The regenerated air that passes around the refrigerant compressor 51 is slightly heated by drive heat generated from the refrigerant compressor 51 (actually heat generated from a motor or the like) and reaches the condenser 60. The regeneration air that has reached the condenser 60 is heated by the condensation of the working fluid that flows inside the condenser 60, and reaches the second heat exchanger 53. The regenerated air that has reached the second heat exchanger 53 is cooled by the evaporation of the refrigerant passing through the second heat exchanger 53, that is, the heat is absorbed by the second heat exchanger 53, and the moisture release region 41. And then discharged to the outside through the regeneration air discharge port 402.

  Thus, in the dehumidifying air conditioner 11, when a heating operation command is given, the processing air introduced from the outside is heated by the first heat exchanger 52, and the heated processing air is supplied to the inside of the store 1. On the other hand, the introduced regeneration air is heated by the condenser 60 and absorbed by the second heat exchanger 53. That is, heat is drawn up (absorbed) from the regenerated air through the second heat exchanger 53, and the process air is heated by the heat absorbed by the second heat exchanger 53 through the first heat exchanger 52.

  FIG. 4 is a flowchart showing the processing contents performed by the controller when the dehumidifying air conditioner performs the dehumidifying operation and the heating operation, and FIG. 5 is a flowchart showing the processing contents of the valve drive control shown in FIG. FIG. 6 is a flowchart showing the processing contents of the fan drive control shown in FIG. The operation of the dehumidifying air conditioner 11 will be described with reference to FIGS. 4 to 6 as appropriate. In the following, for convenience of explanation, a case where a dehumidifying operation is performed will be described as a representative.

  In performing the dehumidifying operation, the controller 70 performs valve drive control (step S101). In this valve drive control, the controller 70 detects the temperature of the regeneration air that has passed through the second heat exchanger 53 through the regeneration temperature sensor S, that is, the temperature of the regeneration air immediately before passing through the moisture release region 41 (step S201). The detected regeneration air temperature (hereinafter also referred to as the detected temperature) is compared with the lower limit value of the target temperature stored in the target temperature setting storage unit 71 to determine whether or not the detected temperature is lower than the target temperature lower limit value. (Step S202).

  When the detected temperature is lower than the target temperature lower limit (step S202: YES), the controller 70 decreases the opening degree of the flow rate adjustment valve 62 through the valve drive processing unit 72 (step S203), and then returns the procedure. . By reducing the opening degree of the flow rate adjustment valve 62 in this way, the resistance of the bypass pipe 61 becomes relatively larger than that when the condenser 60 is passed, thereby causing the fluid compressor 4 in the fluid circulation circuit L2. The ratio at which the working fluid compressed in step 1 passes through the condenser 60 increases. That is, the working fluid passing through the condenser 60 is increased. As a result, the amount of working fluid to be condensed by the condenser 60 is increased, and the heating level of the regenerated air passing around the condenser 60 can be increased. As a result, the regeneration air passing around the condenser 60 is changed so as to be heated.

  On the other hand, when the detected temperature is equal to or higher than the target temperature lower limit value (step S202: NO), the controller 70 determines whether or not the detected temperature exceeds the upper limit value of the target temperature stored in the target temperature setting storage unit 71. (Step S204).

  When the detected temperature exceeds the target temperature upper limit (step S204: YES), the controller 70 increases the opening degree of the flow rate adjustment valve 62 through the valve drive processing unit 72 (step S205), and then returns the procedure. . By increasing the opening degree of the flow rate adjusting valve 62 in this way, the resistance of the bypass pipe 61 becomes relatively smaller than that when the condenser 60 is passed, and thereby the fluid compressor 4 in the fluid circulation circuit L2. The ratio at which the working fluid compressed in step 1 passes through the bypass pipe 61 increases. That is, the working fluid passing through the condenser 60 is reduced. As a result, the amount of working fluid to be condensed by the condenser 60 is reduced, and the heating level of the regenerative air passing around the condenser 60 can be lowered.

  On the other hand, when the detected temperature is equal to or lower than the target temperature upper limit value (step S204: NO), that is, when the detected temperature is within the target temperature range, the state is maintained and the procedure is returned.

  The controller 70 that has performed such valve drive control then performs fan drive control (step S102). In this fan drive control, the controller 70 ends the current process without performing the process to be described later when the opening degree of the flow rate adjusting valve 62 is not decreased in the valve drive control (step S301: NO). Return the procedure. Thereby, the operation state as described above is maintained.

  When the opening degree of the flow rate adjustment valve 62 is decreased in the valve drive control (step S301: YES), the controller 70 determines whether or not the flow rate adjustment valve 62 is fully closed through the valve drive processing unit 72. Is determined (step S302).

  When the flow rate adjustment valve 62 is not in the fully closed state (step S302: NO), the controller 70 returns the procedure without performing the process described later. Thereby, in the next process, the valve drive control of step S101 can be performed again, and the opening degree of the flow regulating valve 62 can be decreased.

  When the flow regulating valve 62 is in the fully closed state (step S302: YES), the controller 70 detects the temperature of the regenerated air immediately before passing through the moisture release region 41 through the regenerative temperature sensor S (step S303), It is determined whether or not the detected regeneration air temperature (detected temperature) is below a target temperature lower limit value (step S304).

  When the detected temperature is lower than the target temperature lower limit value (step S304: YES), the controller 70 decreases the rotation speed of the discharge fan 42 through the fan drive processing unit 73 (step S305), and then returns the procedure. By reducing the rotational speed of the discharge fan 42 in this way, the amount of regenerated air passing through the air discharge path 400 is reduced, that is, the refrigerant compressor 51, the condenser 60, and the second heat exchanger 53 are passed around. The amount of the regenerated air to be blown can be reduced, so that the temperature of the regenerated air immediately before passing through the moisture release region 41 is increased.

  On the other hand, when the detected temperature is equal to or higher than the target temperature lower limit value (step S304: NO), the controller 70 determines whether or not the detected temperature exceeds the upper limit value of the target temperature stored in the target temperature setting storage unit 71. (Step S306).

  When the detected temperature exceeds the target temperature upper limit value (step S306: YES), the controller 70 increases the rotational speed of the discharge fan 42 through the fan drive processing unit 73 (step S307), and then returns the procedure. By increasing the rotational speed of the discharge fan 42 in this way, the amount of the regenerated air passing through the air discharge path 400 is increased, that is, passing around the refrigerant compressor 51, the condenser 60 and the second heat exchanger 53. The amount of the regenerated air to be blown can be increased, so that the temperature of the regenerated air immediately before passing through the moisture release region 41 is lowered.

  On the other hand, when the detected temperature is equal to or lower than the target temperature upper limit (step S306: NO), that is, when the detected temperature is within the target temperature range, the state is maintained and the procedure is returned.

  As shown in FIG. 4, the controller 70 that has performed the fan drive control ends the current process. The processing contents performed by the controller 70 when performing the dehumidifying operation have been described above, but similar processing contents are also performed when performing the heating operation. In the processing when the heating operation is performed, the target temperature is set lower than that when the dehumidifying operation is performed.

  As described above, in the dehumidifying air conditioner 11, the condenser 60 heats the regenerated air that passes toward the moisture release region 41 separately from the heat pump unit 50 (second heat exchanger 53). Even when the outside air temperature is low in the case where the temperature is given, the regeneration air can be sufficiently heated. That is, even if the amount of heat absorbed from the processing air through the first heat exchanger 52 is small, the regeneration air can be sufficiently heated regardless of this. As a result, the regeneration air passes through the moisture release region 41, so that the moisture adsorbent 21 can sufficiently release the moisture.

  Therefore, according to the dehumidifying air conditioner 11 in Embodiment 2 of the present invention, when the dehumidifying operation command is given, the regeneration air can be sufficiently heated to suppress a decrease in the dehumidifying ability of the processing air. .

  In particular, in the dehumidifying air conditioner 11 according to the second embodiment of the present invention, the fluid circulation circuit L2 communicates the fluid piping connected to the inlet side of the condenser 60 and the fluid piping connected to the outlet side of the condenser 60. In this manner, the bypass pipe 61 is disposed, and the bypass pipe 61 is provided with a flow rate adjustment valve 62. The controller 70 controls the opening degree of the flow rate adjustment valve 62 according to the detection result of the regeneration temperature sensor S. Since the amount of working fluid passing through the condenser 60 is adjusted by adjusting, the amount of working fluid passing through the condenser 60 can be finely controlled, and the heating level in the condenser 60 is adjusted as necessary. can do. In both cases of the dehumidifying operation and the heating operation, the controller 70 adjusts the heating level in the condenser 60, thereby maintaining the temperature of the regenerated air immediately before passing through the moisture release region 41 within a desired range. It becomes possible. In addition, when the controller 70 is in a state where the flow rate adjustment valve 62 is fully closed and the temperature detected by the regeneration temperature sensor S is lower than the target temperature lower limit value, the flow rate of the regeneration air is decreased while the flow rate is reduced. When the regulating valve 62 is fully closed and the temperature detected by the regeneration temperature sensor S exceeds the upper limit value of the target temperature, the amount of regeneration air blown is increased. Even when this adjustment cannot be performed, it is possible to adjust the air flow rate and maintain the temperature of the regenerated air immediately before passing through the moisture release region 41 within a desired range.

  Moreover, according to the dehumidification air conditioner 11 in Embodiment 2 of this invention, the condenser 60 is arrange | positioned in the upstream area of the 2nd heat exchanger 53 which comprises the heat pump unit 50, and this 2nd heat exchange. Since the regenerative air passing toward the heat exchanger 53 is heated, when the heating operation command is given, the moisture of the regenerative air freezes on the heat transfer surface of the second heat exchanger 53 and becomes frosted. Can be avoided, and the amount of heat absorbed by the second heat exchanger 53 can be secured, so that the processing air can be heated satisfactorily through the first heat exchanger 52. A decrease in heating capacity can be suppressed. Even if the moisture of the regenerated air is frosted on the heat transfer surface of the second heat exchanger 53, the operation of the heat pump unit 50 is stopped and the regenerated air heated by the condenser 60 is passed to defrost. It becomes possible.

  Furthermore, according to the dehumidifying air conditioner 11 according to Embodiment 2 of the present invention, the condenser 60 includes the evaporator 3 built in the showcase 2 disposed in the store 1 and the fluid that compresses the working fluid. The fluid circulation circuit L2 is configured together with the compressor 4, and the working fluid compressed by the fluid compressor 4 is condensed to heat the regenerated air, so that the exhaust heat of the showcase 2 can be effectively utilized, and a new Since no heat source is required, the cost required for operation can be reduced.

  Furthermore, according to the dehumidifying air conditioner 11, the refrigerant compressor 51 constituting the heat pump unit 50 is disposed in the vicinity of the regeneration air intake 401, more specifically, in the downstream area immediately adjacent to the regeneration air intake 401. The regenerative air can be further heated by the driving heat generated from the refrigerant compressor 51, and in combination with the action and effect of the condenser 60, when the dehumidifying operation command is given, the regenerated air is sufficiently supplied. By heating, a decrease in the dehumidifying capacity of the processing air can be suppressed, and when a heating operation command is given, a decrease in the heating capacity of the processing air can be suppressed.

  Although the preferred embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made. In the first embodiment and the second embodiment, the condenser 60 constitutes the fluid circulation circuit L1 (L2) together with the evaporator 3 of the showcase 2 so that the exhaust heat of the showcase 2 is effectively utilized. However, in the present invention, the condenser (heating means) may constitute a fluid circulation circuit together with an evaporator other than the showcase.

  As described above, the present invention is applied to stores such as supermarkets, convenience stores, and shopping centers, and is useful as a dehumidifying air conditioner having functions of ventilation, dehumidification, and air conditioning by introducing outside air into the store.

It is the schematic diagram which showed typically the structure of the dehumidification air conditioner in Embodiment 1 of this invention. It is the schematic diagram which showed typically the structure of the dehumidification air conditioning apparatus in Embodiment 2 of this invention. It is a block diagram which shows typically the control system of the dehumidification air conditioner of Embodiment 2 of this invention shown in FIG. It is a flowchart which shows the processing content which a controller performs, when a dehumidification air conditioner performs a dehumidification driving | operation and a heating operation. It is a flowchart which shows the processing content of the valve drive control shown in FIG. It is a flowchart which shows the processing content of the fan drive control shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Store 2 Showcase 3 Evaporator 4 Compressor 5 Expansion mechanism 10,11 Dehumidification air conditioner 20 Dehumidification rotor 21 Moisture adsorption body 30 Air supply unit 31 Moisture adsorption area 40 Air release unit 41 Moisture release area 50 Heat pump unit 50a Refrigerant circulation circuit DESCRIPTION OF SYMBOLS 51 Compressor 52 1st heat exchanger 53 2nd heat exchanger 54 Valve body 60 Condenser 61 Bypass piping 62 Flow control valve 70 Controller 71 Target temperature setting memory | storage part 72 Valve drive process part 73 Fan drive process part L1, L2 Fluid Circulation circuit S Regenerative temperature sensor

Claims (8)

A dehumidification rotor that circulates and moves the moisture adsorbent between the partitioned moisture adsorption region and the moisture release region;
An air supply unit for supplying processing air introduced from the outside in a mode of passing through the moisture adsorption region into the target chamber;
An air discharge unit that discharges regeneration air introduced from the outside in a mode of passing through the moisture discharge region;
A dehumidifying operation has a refrigerant circulation circuit in which a compressor for compressing a refrigerant and a first heat exchanger and a second heat exchanger for exchanging heat between the refrigerant and ambient air are sequentially connected by piping. Sometimes the process air passing through the first heat exchanger toward the moisture adsorption region is cooled and the regeneration air passing through the second heat exchanger toward the moisture release region is heated while heating operation A dehumidification air conditioner comprising: a heat pump unit that reverses the refrigerant circulation direction in the refrigerant circulation circuit and heats the processing air passing through the first heat exchanger toward the moisture adsorption region,
A dehumidifying air conditioner comprising heating means for heating the regenerated air that passes toward the moisture release region separately from the heat pump unit.   2. The dehumidifying air conditioner according to claim 1, wherein the heating unit heats the regenerated air that passes toward the second heat exchanger.   The heating means constitutes a fluid circulation circuit that circulates the working fluid together with an evaporator built in a refrigerated refrigerator installed in the target chamber and a compressor that compresses the working fluid, and is compressed by the compressor The dehumidifying air conditioner according to claim 1 or 2, wherein the regenerated air is heated by condensing the working fluid.   The dehumidifying air conditioner according to any one of claims 1 to 3, wherein the heating unit is disposed in an upstream region of the second heat exchanger.   The heating means is disposed in a downstream area of a compressor constituting the heat pump unit, and heats the regenerated air that has passed around the compressor. Dehumidifying air conditioner described in 1. The fluid circulation circuit is disposed in the bypass path disposed in such a manner that the path connected to the inlet side of the heating means communicates with the path connected to the outlet side of the heating means, and the bypass path. And a valve for adjusting the flow rate of the working fluid passing through the bypass path,
Temperature detecting means for detecting the temperature of the regenerated air immediately before passing through the moisture release region;
The dehumidifying air conditioner according to any one of claims 3 to 5, further comprising: a control unit that controls an opening degree of the valve according to a detection result by the temperature detection unit.   The control means reduces the opening of the valve when the temperature detected by the temperature detection means falls below a preset lower limit value of the target temperature, while the detected temperature is an upper limit of the target temperature. The dehumidifying air conditioner according to claim 6, wherein when the value is exceeded, the opening degree of the valve is increased.   The control means reduces the blast amount of the regeneration air when the valve is fully closed and the temperature detected by the temperature detection means is lower than the lower limit value of the target temperature. The amount of blast air of the regeneration air is increased when the valve is fully closed and the temperature detected by the temperature detection means exceeds the upper limit value of the target temperature. Dehumidification air conditioner of description.

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