JP2019174007A - Air conditioning system - Google Patents

Abstract

To provide an air conditioning system allowing for improvement of the dehumidification capacity and the heating capacity thereof to air in an air conditioning target space, in a limited refrigeration cycle.SOLUTION: An air conditioning system 1 comprises a heat pump device 2, and a heat imparting device 12. The heat pump device 2 has a first indoor-side refrigerant heat exchanger 241, and a second indoor-side refrigerant heat exchanger 242. The heat imparting device 12 imparts heat to the air flowing in an indoor flow channel in which the first indoor-side refrigerant heat exchanger 241 and the second indoor-side refrigerant heat exchanger 242 are disposed. The heat pump device 2 can perform a total heat absorption cooling operation and a heat absorption/radiation cooling operation. In the total heat absorption cooling operation, both of the first indoor-side refrigerant heat exchanger 241 and the second indoor-side refrigerant heat exchanger 242 function as evaporators. In the heat absorption/radiation cooling operation, the first indoor-side refrigerant heat exchanger 241 functions as a condenser, and the second indoor-side refrigerant heat exchanger 242 functions as the evaporator.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an air conditioning system, and more particularly to an air conditioning system including a heat pump device and a heat applying device different from the heat pump device.

  Conventionally, an air conditioner capable of performing a cooling reheat dehumidification operation is known (see, for example, Patent Document 1). In this air conditioner, during normal cooling operation, the compressor, the outdoor heat exchanger, the first flow control valve with a small opening, the first indoor heat exchanger, the second indoor heat exchanger, and the compressor are reached. A refrigeration cycle is configured.

  Further, in this air conditioner, during the cooling reheat dehumidifying operation, the compressor, the outdoor heat exchanger, the first flow control valve with a slightly smaller opening, the first indoor heat exchanger, the second with a smaller opening. A refrigeration cycle that reaches the flow control valve, the second indoor heat exchanger, and the compressor is configured.

JP 2001-82761 A

  In the air conditioner disclosed in Patent Document 1, the second indoor heat exchanger serves as an evaporator and the first indoor heat exchanger serves as a condenser during the cooling reheat dehumidifying operation. In a limited refrigeration cycle, it has been difficult to improve the dehumidification capacity in the evaporator and the reheat capacity in the condenser.

  This invention is invented in view of the said conventional problem, Comprising: It is providing the air-conditioning system which can improve the dehumidification capability with respect to the air of an air-conditioning object space, and a heating capability in the limited refrigeration cycle. .

  In order to solve the above problem, an air conditioning system according to a first aspect includes a heat pump device, a heat application device, and a control unit. The heat pump device includes a compressor, an outdoor refrigerant heat exchanger, an expansion mechanism, a first indoor refrigerant heat exchanger, and a second indoor refrigerant heat exchanger. The heat applying device applies heat to air flowing through an indoor flow path in which the first indoor-side refrigerant heat exchanger and the second indoor-side refrigerant heat exchanger are arranged in the heat pump device. The control unit controls the heat pump device and the heat application device.

  The heat pump device is capable of performing a total endothermic cooling operation and an absorption / radiation cooling operation. In the total endothermic cooling operation, the refrigerant functions as the compressor, the outdoor refrigerant heat exchanger functioning as a condenser, the expansion mechanism, the first indoor refrigerant heat exchanger functioning as an evaporator, and an evaporator. The refrigerant flows in order through the second indoor-side refrigerant heat exchanger and the compressor. In the absorption / radiation cooling operation, the refrigerant functions as the compressor, the outdoor refrigerant heat exchanger functioning as a condenser, the first indoor refrigerant heat exchanger functioning as a condenser, the expansion mechanism, and an evaporator. The second indoor-side refrigerant heat exchanger and the compressor are sequentially passed.

  Moreover, in the invention which concerns on Claim 2, in the invention which concerns on Claim 1, the said control part makes the said heat pump apparatus perform the said all the endothermic cooling operation or the said heat absorption / radiation cooling operation, and the said heat provision It is possible to perform a heat application dehumidification operation in which the apparatus is driven and heat is applied to the air flowing through the indoor flow path by the heat application device.

  Moreover, in the invention which concerns on Claim 3, in the invention which concerns on Claim 2, the said air conditioning system is further provided with the suction humidity detection part which detects the suction humidity of the air which flows through the said indoor flow path. When the suction humidity is within a predetermined humidity range, the control unit causes the heat pump device to perform the total endothermic cooling operation, and drives the heat application device to cause the heat application device to perform the indoor flow path. It is possible to execute an ignition application dehumidifying operation for applying heat to the air flowing through.

  In the invention which concerns on Claim 1, since the air of air-conditioning object space can be heated with a heat provision apparatus, the dehumidification capability of air can be improved, maintaining the heating of air. Thereby, in the limited refrigerating cycle, the dehumidification capability with respect to the air of the air-conditioning object space, and a heating capability can be improved.

  In the invention which concerns on Claim 2, the heating capability of the air by the 1st indoor side refrigerant | coolant heat exchanger can be reduced or eliminated by heating the air of air-conditioning object space with a heat provision apparatus. Accordingly, the air dehumidifying ability of the second indoor-side refrigerant heat exchanger, or the first indoor-side refrigerant heat exchanger and the second indoor-side refrigerant heat exchanger can be improved.

  In the invention which concerns on Claim 3, in order to dehumidify air by both a 1st indoor side refrigerant | coolant heat exchanger and a 2nd indoor side refrigerant | coolant heat exchanger by a strong heat provision dehumidification operation, the dehumidification capability of air is carried out. It can be greatly improved.

It is a lineblock diagram showing roughly the whole air-conditioning system concerning a first embodiment. It is a block diagram which shows the control system of an air conditioning system same as the above. It is a flowchart of the cooling operation in an air conditioning system same as the above. It is a figure which shows the relationship between the coefficient of performance and the cooling load in the refrigerating cycle in an air conditioning system same as the above. It is a flowchart except a part of dehumidification driving | operation in an air conditioning system same as the above. It is a flowchart of a part of dehumidification driving | operation in an air conditioning system same as the above.

  The present disclosure relates to an air conditioning system, and more particularly, to an air conditioning system including a heat pump device and a heat applying device different from the heat pump device. Hereinafter, a first embodiment of an air conditioning system according to the present disclosure will be described based on FIGS. 1 to 6.

  As shown in FIG. 1, the air conditioning system 1 includes a heat pump device 2, a hot water supply device 3 as a heat application device 12, and a control unit 10 (see FIG. 2).

  As shown in FIG. 1, the heat pump device 2 includes a compressor 21, an outdoor-side refrigerant heat exchanger 22, an expansion mechanism 23, and an indoor-side refrigerant heat exchanger 24, and constitutes a refrigeration cycle.

  The heat pump device 2 includes an outdoor unit 201 and an indoor unit 202. The outdoor unit 201 includes devices such as a casing (not shown), a compressor 21, an outdoor refrigerant heat exchanger 22, an expansion mechanism 23, a four-way valve 25, and a blower 26 that are accommodated in the casing. Have.

  The expansion mechanism 23 is configured by an electronic expansion valve in the first embodiment. As the expansion mechanism 23, a first expansion mechanism 231 and a second expansion mechanism 232 are provided. The first expansion mechanism 231 and the second expansion mechanism 232 each have a large opening for simply forming a flow path without exhibiting the function as the expansion mechanism, and for exhibiting the function as the expansion mechanism. Switch to one of two states with a small opening. In addition, the 1st expansion mechanism 231 and the 2nd expansion mechanism 232 should just be a thing which can adjust an opening degree, and are not limited to an electronic expansion valve.

  One end of the flow path of the first expansion mechanism 231 is connected to one end of the flow path of the outdoor refrigerant heat exchanger 22 via the refrigerant flow path 27. The outdoor refrigerant heat exchanger 22 is disposed in the middle of an outdoor air flow path (not shown) in the outdoor unit 201. The casing of the outdoor unit 201 has an outside air intake port (not shown) and an outlet port (not shown), and an outside air flow path is formed between the intake port and the outlet port. A fan as the blower 26 is further disposed in the middle of the outside air flow path.

  The other end of the flow path of the outdoor refrigerant heat exchanger 22 is connected to the first port 251 of the four-way valve 25 via the refrigerant flow path 27. The second port 252 of the four-way valve 25 is connected to one end of the flow path of the compressor 21 via the refrigerant flow path 27. The other end of the flow path of the compressor 21 is connected to the third port 253 of the four-way valve 25 via the refrigerant flow path 27. The refrigerant flow path 27 connected to the other end of the flow path of the first expansion mechanism 231 and the refrigerant flow path 27 connected to the fourth port 254 of the four-way valve 25 are led out from the outdoor unit 201, and the indoor unit 202.

  The indoor unit 202 includes devices such as a casing (not shown), the indoor-side refrigerant heat exchanger 24, the indoor-side heat medium heat exchanger 33, and the blower 28 that are accommodated in the casing. However, the indoor heat medium heat exchanger 33 is an element that constitutes the air conditioning system 1, but is not an element that constitutes the heat pump device 2. As the indoor-side refrigerant heat exchanger 24, a first indoor-side refrigerant heat exchanger 241 and a second indoor-side refrigerant heat exchanger 242 are provided.

  The casing of the indoor unit 202 has an indoor air intake port (not shown) and a blow-out port (not shown), and an indoor flow path (not shown) is formed between the intake port and the blow-out port. In the middle of the indoor flow path, from the intake port side to the blowout port side, a fan as the blower 28, the indoor heat medium heat exchanger 33, the first indoor refrigerant heat exchanger 241 and the second indoor refrigerant heat exchange. The devices 242 are arranged in this order. The 1st indoor side refrigerant | coolant heat exchanger 241 and the 2nd indoor side refrigerant | coolant heat exchanger 242 are located in a line in the direction which cross | intersects the flow direction of an indoor flow path.

  The other end of the first expansion mechanism 231 is connected to one end of the flow path of the first indoor-side refrigerant heat exchanger 241 via the refrigerant flow path 27. The other end of the flow path of the first indoor-side refrigerant heat exchanger 241 is connected to one end of the second expansion mechanism 232 via the refrigerant flow path 27. The other end of the second expansion mechanism 232 is connected to one end of the flow path of the second indoor-side refrigerant heat exchanger 242. The other end of the flow path of the second indoor-side refrigerant heat exchanger 242 is connected to the fourth port 254 of the four-way valve 25 via the refrigerant flow path 27.

  The four-way valve 25 has a state in which the first port 251 and the second port 252 communicate with each other and the third port 253 and the fourth port 254 communicate with each other, and the first port 251 and the third port 253 communicate with each other. It is possible to arbitrarily switch to one of the states in which the second port 252 and the fourth port 254 communicate with each other.

As shown in FIG. 2, the control unit 10 controls the heat pump device 2. The control unit 10 includes, for example, a microcomputer, and controls the operation of each element by executing a program stored in a storage medium such as a ROM (Read Only Memory). Specifically, the control unit 10 is disposed in the outdoor unit 201 and the indoor unit 202, adjusting the transport amount (l / s) of the refrigerant transported by the compressor 21 per unit time, adjusting the opening of the expansion mechanism 23. The air volume per unit time (m ³ / s) and the switching of the four-way valve 25 by the air blowers 26 and 28 can be controlled.

  With this heat pump device 2, a cooling operation and a heating operation can be selectively performed. As shown in FIG. 1, during the cooling operation, the four-way valve 25 is in a state where the first port 251 and the second port 252 communicate with each other and the third port 253 and the fourth port 254 communicate with each other. Furthermore, the opening degree of the first expansion mechanism 231 is decreased to exert the function as the expansion mechanism, and the opening degree of the second expansion mechanism 232 is increased so that the function as the expansion mechanism is not exhibited. Accordingly, the compressor 21, the outdoor refrigerant heat exchanger 22 (condenser), the first expansion mechanism 231, the first indoor refrigerant heat exchanger 241 (evaporator), and the second indoor refrigerant heat exchanger 242 (evaporation). ), The refrigerant flow path 27 reaching the compressor 21 is formed again, and the cooling operation (the all-endothermic cooling operation described later) is performed.

  Further, during the heating operation, the four-way valve 25 is in a state in which the first port 251 and the third port 253 communicate with each other and the second port 252 and the fourth port 254 communicate with each other. Furthermore, the opening degree of the first expansion mechanism 231 is decreased to exert the function as the expansion mechanism, and the opening degree of the second expansion mechanism 232 is increased so that the function as the expansion mechanism is not exhibited. Thereby, the compressor 21, the 2nd indoor side refrigerant | coolant heat exchanger 242 (condenser), the 1st indoor side refrigerant | coolant heat exchanger 241 (condenser), the 1st expansion mechanism 231, the outdoor side refrigerant | coolant heat exchanger 22 (evaporation) The refrigerant flow path 27 reaching the compressor 21 is formed again, and the heating operation is performed. In the heat pump device 2, the cooling operation and the heating operation are performed under the control of the control unit 10.

  Such a heat pump device 2 is widely known in the past, and various devices can be used as appropriate and are not particularly limited. For example, the heat pump device 2 may have a device such as an accumulator as appropriate.

  In the first embodiment, the air conditioning system 1 further includes a hot water supply device 3. The hot water supply device 3 includes a heat source unit 31, a heat medium, a heat medium flow path 32, an indoor heat medium heat exchanger 33, and a heat source control unit 30 (see FIG. 2).

  The heat source unit 31 heats the heat medium. In the first embodiment, the heat source unit 31 is configured by a fuel cell. The fuel cell may constitute a hot water storage type so-called cogeneration system or may be used alone. Heat generated in the fuel cell is applied to the heat medium via a heat exchanger (not shown). In addition, when a fuel cell comprises a cogeneration system, energy efficiency is high. For this reason, it is preferable that the heat source part 31 is comprised by the fuel cell which comprises a cogeneration system.

  The heat medium flow path 32 is configured by a circulation pipe through which the heat medium flows. In the middle of the heat medium flow path 32, a heat source unit 31 and an indoor heat medium heat exchanger 33 are arranged. As described above, the indoor-side heat medium heat exchanger 33 is arranged in the indoor flow path in the casing of the indoor unit 202. The hot water supply device 3 including the indoor heat medium heat exchanger 33 constitutes the heat applying device 12 that applies heat to the air flowing through the indoor flow path in the casing of the indoor unit 202. By using the hot water supply device 3 as the heat application device 12, the followability is improved.

  As shown in FIG. 2, the heat source control unit 30 controls the heat source unit 31. The heat source control unit 30 includes, for example, a microcomputer, and controls the operation of each element by executing a program stored in a storage medium such as a ROM. Specifically, the heat source control unit 30 can control the amount of heat per unit time generated by the heat source unit 31 and applied to the heat medium flowing through the heat medium flow path 32.

  As shown in FIG. 1, in the middle of the heat medium flow path 32, a transfer device 34 made of a pump or the like and a valve 35 made of a flow rate adjusting valve or an electromagnetic valve are arranged. As shown in FIG. 2, the transport device 34 and the valve 35 are controlled by the heat source control unit 30.

  In the first embodiment, the air conditioning system 1 further includes a communication device (not shown) that performs communication between the control unit 10 and the heat source control unit 30. By the communication device, the control unit 10 and the heat source control unit 30 can transmit and receive each other wirelessly or by wire. The control unit 10 can control the hot water supply device 3 by communicating with the heat source control unit 30 via the communication device.

  Note that such communication devices are widely known in the past, and various devices can be used as appropriate and are not particularly limited.

The air conditioning system 1 further includes a suction humidity detector 15. The suction humidity detector 15 detects the suction humidity Hs (g / m ³ ) of air flowing through the indoor flow path. The suction humidity detector 15 is disposed in the vicinity of the intake port of the indoor flow path in the casing of the indoor unit 202. Such a suction humidity detection unit 15 is widely known, and various types can be used as appropriate, and are not particularly limited. The suction humidity Hs information detected by the suction humidity detection unit 15 is received by the control unit 10.

  The air conditioning system 1 further includes a suction temperature detection unit 11. The suction temperature detection unit 11 detects the suction temperature Ts (° C.) on the indoor side in the heat pump device 2 (that is, the temperature of the air in the air-conditioning target space). The suction temperature detection unit 11 is disposed in the vicinity of the intake port of the indoor flow path in the casing of the indoor unit 202. The suction temperature Ts information detected by the suction temperature detection unit 11 is received by the control unit 10.

  In the first embodiment, the outside air temperature detection unit 14 that detects the outside air temperature To (° C.) is disposed in the vicinity of the intake port of the outside air passage in the casing of the outdoor unit 201. The outside air temperature To information detected by the outside air temperature detector 14 is received by the controller 10. In addition, although the suction temperature detection part 11 and the external temperature detection part 14 are mainly comprised by the thermistor, various temperature sensors other than the thermistor can be utilized suitably and are not specifically limited.

The control unit 10 controls the heat pump device 2 to perform a cooling operation. In the cooling operation, the control unit 10 performs control so that the suction temperature Ts becomes the indoor target temperature Ta (° C.). The indoor target temperature Ta is a generally comfortable temperature such as 18 ° C., for example. In the first embodiment, the air conditioning system 1 includes an operation unit 13. The user can arbitrarily set the indoor target temperature Ta, the indoor target relative humidity, and the air volume Qa (m ³ / s) blown from the blowout port of the indoor unit 202 by operating the operation unit 13. Information on the indoor target temperature Ta, the indoor target relative humidity, and the air volume Qa input from the operation unit 13 is received by the control unit 10.

  In the first embodiment, in the cooling operation, the control unit 10 performs feedback control so that the suction temperature Ts falls within a predetermined temperature range including the indoor target temperature Ta. The predetermined temperature range is a temperature range between an allowable upper limit temperature Tu (° C.) that is equal to or higher than the indoor target temperature Ta and an allowable lower limit temperature Tl (° C.).

  The allowable upper limit temperature Tu is a temperature that is appropriately determined by, for example, Tu = indoor target temperature Ta + 5. Further, the allowable lower limit temperature Tl is a temperature that is appropriately determined by, for example, setting the indoor target temperature Ta. The allowable upper limit temperature Tu and the allowable lower limit temperature Tl are not particularly limited with respect to the indoor target temperature Ta, but satisfy Tl <Tu.

  The controller 10 adjusts the number of revolutions per unit time of the motor included in the compressor 21 to control the amount of refrigerant transported. Further, the control unit 10 adjusts the number of rotations per unit time of the motor of the blower 28 disposed in the indoor unit 202 to control the air volume Qa blown from the blowout port of the casing of the indoor unit 202. Further, the control unit 10 controls the amount of air flowing through the outdoor air flow path of the outdoor unit 201 by adjusting the number of rotations per unit time of the motor included in the blower device 26 disposed in the outdoor unit 201.

  The heat pump device 2 can execute a total endothermic cooling operation and an absorption / radiation cooling operation as the cooling operation.

  When performing the all-endothermic cooling operation, the control unit 10 causes the four-way valve 25 to communicate with the first port 251 and the second port 252 and with the third port 253 and the fourth port 254. . Further, the control unit 10 reduces the opening degree of the first expansion mechanism 231 to exhibit the function as the expansion mechanism, and increases the opening degree of the second expansion mechanism 232 so as not to exhibit the function as the expansion mechanism. To do. Accordingly, the compressor 21, the outdoor refrigerant heat exchanger 22 (condenser), the first expansion mechanism 231, the first indoor refrigerant heat exchanger 241 (evaporator), and the second indoor refrigerant heat exchanger 242 (evaporation). ), A refrigerant circuit for total endothermic cooling that reaches the compressor 21 again is formed, and the total endothermic cooling operation is performed.

  When the controller 10 performs the absorption / radiation cooling operation, the four-way valve 25 is in a state in which the first port 251 and the second port 252 communicate with each other and the third port 253 and the fourth port 254 communicate with each other. However, this point is the same as in the case of performing all endothermic cooling operation.

  Further, the control unit 10 increases the opening degree of the first expansion mechanism 231 so as not to exert the function as the expansion mechanism, and decreases the opening degree of the second expansion mechanism 232 so that the function as the expansion mechanism is exhibited. . As a result, the compressor 21, the outdoor refrigerant heat exchanger 22 (condenser), the first indoor refrigerant heat exchanger 241 (condenser), the second expansion mechanism 232, and the second indoor refrigerant heat exchanger 242 (evaporation). The refrigerant circuit for absorption / radiation cooling that reaches the compressor 21 is formed again, and the absorption / radiation cooling operation is performed.

  That is, in the heat absorption / radiation cooling operation, heat is dissipated in the first indoor refrigerant heat exchanger 241 in the indoor refrigerant heat exchanger 24, and heat is absorbed in the second indoor refrigerant heat exchanger 242.

  The cooling operation by the refrigerating cycle including the total endothermic cooling operation and the absorption / radiation cooling operation operated in the air conditioning system 1 will be described with reference to FIG.

  When the cooling operation is started, the control unit 10 reads and sets the indoor target temperature Ta and the air volume Qa input from the operation unit 13 in (S1).

  In (S2), the control unit 10 sets the allowable upper limit temperature Tu and the allowable lower limit temperature Tl based on the indoor target temperature Ta.

  In (S3), the control unit 10 starts detecting the suction temperature Ts by the suction temperature detection unit 11.

  In (S4), the control unit 10 drives the compressor 21, the blower device 26 of the outdoor unit 201, and the blower device 28 of the indoor unit 202. When the compressor 21 and the blowers 26 and 28 are driven, a refrigeration cycle is established and the heat pump device 2 is driven, and the suction temperature Ts rises.

  In (S5), the control unit 10 determines whether or not the suction temperature Ts is lower than the allowable lower limit temperature Tl. If the suction temperature Ts is not less than the allowable lower limit temperature Tl, the process returns to (S5). If the suction temperature Ts is lower than the allowable lower limit temperature Tl, the process proceeds to (S6).

  In (S6), the control part 10 stops the compressor 21 and the air blowers 26 and 28, and complete | finishes air_conditionaing | cooling operation.

  The stop of the cooling operation is always accepted, and when the stop of the cooling operation is input by the operation unit 13, the control unit 10 stops the cooling operation.

By the way, in the cooling operation by the heat pump device 2, the cooling load W (W) is based on the air volume Qa, the indoor target temperature Ta, and the suction temperature Ts.
W = Qa × (Ta−Ts) × A (Formula 1)
Is required. A in (Expression 1) is a constant determined for each heat pump device 2.

  A relationship shown in FIG. 4 exists between the cooling load W and a coefficient of performance (hereinafter referred to as COP) in the refrigeration cycle. Here, Wmin (W) is the minimum value of the cooling load W, and is mainly the minimum throttle load determined based on the minimum limit transport amount of the refrigerant transported by the compressor 21 and the outside air temperature To. The minimum limit transport amount is mainly determined by the lower limit value of the number of rotations per unit time of the motor included in the compressor 21.

  Wmax (W) is the maximum value of the cooling load W, and is determined mainly based on the maximum limit transport amount of the refrigerant transported by the compressor 21 and the outside air temperature To. The maximum limit transport amount is mainly determined by the upper limit value of the number of rotations per unit time of the motor included in the compressor 21.

  In the relationship shown in FIG. 4, the specific values of the cooling load W and COP are determined for each heat pump device 2, and thus description of the specific values is omitted.

  As shown in FIG. 4, when the cooling load at which COP is maximized is Wcmax (W), the range where the upper limit is Wcmax + α1 (W) and the lower limit is Wcmax−α2 (W) is the high-efficiency operation range Z And Here, α1 and α2 are appropriately determined depending on how wide various allowable ranges are taken from the viewpoint of COP and energy efficiency.

  When the cooling operation by the refrigeration cycle is performed when the cooling load W is within the high-efficiency operation range Z, it is preferable because of high COP and energy efficiency. Further, if the cooling operation by the refrigeration cycle is performed when the cooling load W is outside the high-efficiency operation range Z, COP and energy efficiency are low, which is not preferable.

  Hereinafter, the case where dehumidification is performed in the air conditioning system 1 will be described.

  In the air conditioning system 1, when the air blown into the air-conditioning target space is not heated after dehumidification, the heat absorption device 12 performs a full endothermic cooling operation, and the heat application device 12 is not driven.

In the air conditioning system 1, when the air blown into the air-conditioning target space after dehumidification is heated, one of the following (1) to (3) is mainly performed.
(1) Conventional Reheat Dehumidifying and Cooling Operation The air conditioning system 1 performs an absorption / radiation cooling operation by the heat pump device 2 and does not drive the heat applying device 12. In the 1st indoor side refrigerant | coolant heat exchanger 241, the heating of the air which blows off into air-conditioning object space is performed. In the second indoor-side refrigerant heat exchanger 242, dehumidification and cooling of the air blown into the air-conditioning target space is performed.

In contrast to (1) in which the heat application device 12 is not driven, (2) to (3) are heat application dehumidification operations in which the heat application device 12 is driven.
(2) Weak heat application dehumidification operation The air conditioning system 1 performs the heat absorption / radiation cooling operation by the heat pump device 2 to drive the heat application device 12. In the 1st indoor side refrigerant | coolant heat exchanger 241, the heating of the air which blows off into air-conditioning object space is performed. Furthermore, the air blown into the air-conditioning target space is also heated by the heat application device 12. Further, in the second indoor-side refrigerant heat exchanger 242, dehumidification and cooling of the air blown into the air-conditioning target space are performed.

In (2), the conveyance amount per unit time of the refrigerant conveyed in the heat pump device 2 is increased as compared with the reheat dehumidification operation in (1). Thereby, in the 2nd indoor side refrigerant | coolant heat exchanger 242, the dehumidification amount with respect to the air which blows off into the air-conditioning object space can be taken large. At this time, the cooling amount with respect to the air blown into the air-conditioning target space in the second indoor-side refrigerant heat exchanger 242 also increases. For this reason, in (1), the heat application device 12 that is not driven is driven to further heat the air blown into the air-conditioning target space, thereby raising the temperature of the air. Note that the temperature of the air blown into the air-conditioning target space is not significantly different from the case of (1).
(3) Igniting Dehumidification Operation The air conditioning system 1 performs a full endothermic cooling operation by the heat pump device 2 to drive the heat application device 12. In the 1st indoor side refrigerant | coolant heat exchanger 241 and the 2nd indoor side refrigerant | coolant heat exchanger 242, dehumidification of the air which blows off to an air-conditioning object space and cooling are performed.

  The air blown into the air-conditioning target space is not heated by the indoor refrigerant heat exchanger 24 but is heated only by the heat applying device 12.

  In (3), the conveyance amount per unit time of the refrigerant conveyed in the heat pump device 2 is the same as in (2). Dehumidification of the air blown into the air-conditioning target space was performed only in the second indoor-side refrigerant heat exchanger 242 in (2), whereas in (3), the first indoor-side refrigerant heat exchanger 241 and the second This is performed in both of the two indoor-side refrigerant heat exchangers 242. Thereby, the dehumidification amount with respect to the air blown into the air-conditioning target space can be made larger than in the case of (2). On the other hand, the amount of cooling with respect to the air blown into the air-conditioning target space becomes even larger than in the case of (2), and the first indoor-side refrigerant heat exchanger 241 performs heating to the air blown into the air-conditioning target space. I will not be broken. For this reason, the amount of heat imparted to the air blown into the air-conditioning target space by the heat imparting device 12 is even greater than in the case of (2).

  Next, the dehumidifying operation will be described with reference to FIG.

When the dehumidifying operation is started, the control unit 10 converts the indoor target relative humidity input from the operation unit 13 into the indoor target humidity Ha (g / m ³ ) and sets it in (S11).

In (S12), the control unit 10 sets an allowable humidity range having an allowable upper limit humidity (g / m ³ ) and an allowable lower limit humidity (g / m ³ ) based on the indoor target humidity Ha. The allowable humidity range is a humidity range that is appropriately determined based on the indoor target humidity Ha, and is not particularly limited.

  In (S13), the control unit 10 obtains and sets the first humidity range, the second humidity range, and the third humidity range for the suction humidity Hs mainly based on the indoor target humidity Ha. The first humidity range is a humidity range in which the reheat dehumidifying operation (1) is to be performed. A 2nd humidity range is a humidity range which should perform the low heat provision dehumidification driving | operation of said (2). The third humidity range is a humidity range in which the ignition application dehumidifying operation (3) is to be performed.

  The first humidity range to the third humidity range are mainly determined in consideration of COP or the like so that the energy efficiency of the heat pump device 2 and the hot water supply device 3 is increased. Even if the energy efficiency of the heat pump device 2 and the hot water supply device 3 is low, other operations (for example, the reheat dehumidification operation of (1) and the (2) reheat dehumidification operation with respect to the ignition application dehumidification operation of (3) When it cannot be achieved by the low heat application dehumidifying operation), the humidity range to be achieved is uniquely determined.

  In (S14), the control unit 10 starts the detection of the suction humidity Hs by the suction humidity detection unit 15.

  In (S15), the control unit 10 determines whether or not the suction humidity Hs is within the first humidity range. If it is determined in (S15) that it is within the first humidity range, the process proceeds to (S16). The case where it is not determined in (S15) that it is within the first humidity range will be described later.

  In (S16), the control part 10 drives the heat pump apparatus 2 by driving the compressor 21 and the air blowers 26 and 28. FIG. Furthermore, the control unit 10 switches between the first expansion mechanism 231 and the second expansion mechanism 232 so that the refrigerant circuit for absorbing and radiating and radiating cooling is formed. Note that the hot water supply device 3 remains stopped.

  In the dehumidifying operation, the control unit 10 performs feedback control so that the suction humidity Hs falls within the allowable humidity range.

  In (S17), the control unit 10 determines whether or not the suction humidity Hs is within the allowable humidity range. If the suction humidity Hs is not within the allowable humidity range, the process returns to (S17). If the suction humidity Hs is within the allowable humidity range, the process proceeds to (S18).

  In (S18), the control part 10 stops the heat pump apparatus 2 by stopping the compressor 21 and the air blowers 26 and 28, and complete | finishes a dehumidification driving | operation.

  Next, the case where it is not determined in (S15) that it is within the first humidity range will be described. In this case, the process proceeds to the flow shown in FIG.

  In (S21), the control unit 10 determines whether or not the suction humidity Hs is within the second humidity range. If it is determined in (S21) that it is within the second humidity range, the process proceeds to (S22).

  In (S22), the control part 10 drives the heat pump apparatus 2 by driving the compressor 21 and the air blowers 26 and 28. FIG. Furthermore, the control unit 10 switches between the first expansion mechanism 231 and the second expansion mechanism 232 so that the refrigerant circuit for absorbing and radiating and radiating cooling is formed. Furthermore, the control unit 10 drives the hot water supply device 3 to flow the heat medium through the indoor heat medium heat exchanger 33.

  Specifically, the control unit 10 sends a signal requesting that the heat medium necessary for heating the air blown into the air-conditioning target space to flow through the indoor heat medium heat exchanger 33 via the communication device. It transmits to the heat source control part 30. The heat source control unit 30 receives this signal and drives the hot water supply device 3.

  The heat source control unit 30 is necessary for the heat medium to give a necessary amount of heat to the air flowing through the indoor flow path, based on the temperature and amount of the heat medium that flows toward the indoor heat medium heat exchanger 33. A proper heating amount (W) is obtained.

  Does the heat source control unit 30 have, as data, the relationship between the temperature and amount of the heat medium that flows toward the indoor heat medium heat exchanger 33 and the temperature of the heat medium that returns from the indoor heat medium heat exchanger 33? Or it is grasped by calculating. The heat source control unit 30 has a relationship between the temperature and amount of the heat medium that flows toward the indoor heat medium heat exchanger 33 and the amount of heat applied to the air that flows through the indoor flow path from the indoor heat medium heat exchanger 33. I know. Mainly due to this relationship, the amount of heat to be applied to the heat medium in the heat source unit 31 is required in order for the heat medium to apply the necessary amount of heat to the air flowing through the indoor flow path.

  The heat source control unit 30 allows the heat medium heated by the heat source unit 31 and applied with heat to flow toward the indoor heat medium heat exchanger 33. The heat source control unit 30 adjusts the amount of heating to the heat medium flowing through the heat medium flow path 32 by adjusting the opening of the valve 35 or opening and closing (duty control) of the valve 35.

  In (S23), the control unit 10 determines whether or not the suction humidity Hs is within the allowable humidity range. If the suction humidity Hs is not within the allowable humidity range, the process returns to (S23). If the suction humidity Hs is within the allowable humidity range, the process proceeds to (S24).

  In (S24), the control part 10 stops the heat pump apparatus 2 by stopping the compressor 21 and the air blowers 26 and 28, stops the hot water supply apparatus 3, and complete | finishes dehumidification operation.

  Regarding the stop of the hot water supply device 3, specifically, the control unit 10 sends a signal requesting to stop the flow of the heat medium to the indoor heat medium heat exchanger 33 via the communication device. It transmits to the control part 30. The heat source control unit 30 receives this signal and stops the hot water supply device 3.

  In (S21), when it is not determined that the suction humidity Hs is within the second humidity range, the process proceeds to (S25). When the suction humidity Hs is neither within the first humidity range nor within the second humidity range, it is within the third humidity range.

  In (S25), the control part 10 drives the heat pump apparatus 2 by driving the compressor 21 and the air blowers 26 and 28. FIG. Furthermore, the control unit 10 switches between the first expansion mechanism 231 and the second expansion mechanism 232 so that a total heat radiation cooling refrigerant circuit is formed. Furthermore, the control unit 10 drives the hot water supply device 3 to flow the heat medium through the indoor heat medium heat exchanger 33. About the drive of the hot water supply apparatus 3, it is the same as that of (S22), However, About the heat amount which a heat medium provides to the air which flows through an indoor flow path, and the heating amount in the heat-source part 31 differ from (S22).

  In (S26), the control unit 10 determines whether or not the suction humidity Hs is within the allowable humidity range. If the suction humidity Hs is not within the allowable humidity range, the process returns to (S26). If the suction humidity Hs is within the allowable humidity range, the process proceeds to (S27).

  In (S27), the control part 10 stops the heat pump apparatus 2 by stopping the compressor 21 and the air blowers 26 and 28, stops the hot water supply apparatus 3, and complete | finishes dehumidification operation.

  The stop of the hot water supply device 3 is the same as (S24).

  In the air conditioning system 1 described above, in the dehumidifying operation, not only the heat pump device 2 but also the heat applying device 12 can heat the air in the air conditioning target space. For this reason, while maintaining the heating of the air in the air-conditioning target space, the heating capacity of the air by the first indoor-side refrigerant heat exchanger 241 is reduced (in the case of low heat application dehumidification operation) or is eliminated (high heat application). Dehumidifying operation). Accordingly, the second indoor-side refrigerant heat exchanger 242 (in the case of weak heat application dehumidifying operation), or the first indoor-side refrigerant heat exchanger 241 and the second indoor-side refrigerant heat exchanger 242 (in high heat application dehumidifying operation). The air dehumidifying ability can be improved. Thereby, in the limited refrigerating cycle, the dehumidification capability with respect to the air of the air-conditioning object space, and a heating capability can be improved.

  Next, a modification of the first embodiment will be described.

  In the first embodiment, the heat pump apparatus 2 has the four-way valve 25 and can perform both the cooling operation and the heating operation.

  The air conditioning system 1 has the heat source control unit 30 separately from the control unit 10 in the first embodiment, but does not have the heat source control unit 30 different from the control unit 10, and the control unit 10 controls the heat source. The function of the unit 30 may be included.

  The air conditioning system 1 includes the communication device in the first embodiment, but may not include the communication device.

  The indoor target relative humidity, the indoor target temperature Ta, and the air volume Qa can be arbitrarily set by the user in the first embodiment, but may not be arbitrarily set by the user. The user may directly set the indoor target humidity Ha.

  In the first embodiment, the control unit 10 controls the suction temperature Ts to be the indoor target temperature Ta by feedback control in the heating operation. However, the control unit 10 does not necessarily need to be based on feedback control.

  The suction temperature detection unit 11 and the suction humidity detection unit 15 may not be arranged near the intake port of the indoor flow path in the casing of the indoor unit 202.

  The outside air temperature detection unit 14 may be provided not in the outdoor unit 201 but in a portion located outside the hot water supply device 3.

DESCRIPTION OF SYMBOLS 1 Air conditioning system 10 Control part 12 Heat provision apparatus 15 Suction humidity detection part 2 Heat pump apparatus 21 Compressor 22 Outdoor refrigerant | coolant heat exchanger 23 Expansion mechanism 241 1st indoor side refrigerant | coolant heat exchanger 242 2nd indoor side refrigerant | coolant heat exchanger

Claims (3)

A heat pump device having a compressor, an outdoor refrigerant heat exchanger, an expansion mechanism, a first indoor refrigerant heat exchanger, and a second indoor refrigerant heat exchanger;
A heat application device for applying heat to air flowing through an indoor flow path in which the first indoor-side refrigerant heat exchanger and the second indoor-side refrigerant heat exchanger are arranged in the heat pump device;
A controller that controls the heat pump device and the heat application device,
The heat pump device
The refrigerant is the compressor, the outdoor refrigerant heat exchanger functioning as a condenser, the expansion mechanism, the first indoor refrigerant heat exchanger functioning as an evaporator, and the second indoor refrigerant heat functioning as an evaporator. An exchanger, a total endothermic cooling operation sequentially flowing through the compressor,
The refrigerant is the compressor, the outdoor refrigerant heat exchanger functioning as a condenser, the first indoor refrigerant heat exchanger functioning as a condenser, the expansion mechanism, and the second indoor refrigerant functioning as an evaporator. A heat exchanger, an absorption / radiation cooling operation for passing through the compressor in order,
The air conditioning system is feasible. The controller is
Heat that causes the heat pump device to perform the all-end-of-heat absorption cooling operation or the absorption-and-radiation heat-release cooling operation, and drives the heat application device to apply heat to the air flowing through the indoor flow path by the heat application device. The air conditioning system according to claim 1, wherein the imparting dehumidifying operation is executable. A suction humidity detector for detecting the suction humidity of air flowing through the indoor flow path;
The controller is
When the suction humidity is within a predetermined humidity range, air that causes the heat pump device to perform the all-endothermic cooling operation and drives the heat application device to flow through the indoor flow path by the heat application device. The air conditioning system according to claim 2, wherein an intense heat dehumidifying operation for applying heat to the air is executable.

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