JP5852800B2 - Air conditioning equipment - Google Patents

Description

The present invention relates to an air conditioning facility that adjusts indoor temperature and humidity together with ventilation.

Conventionally, in many homes and workplaces, air conditioning is performed using a cooling / heating device in which an indoor unit and an outdoor unit are connected via a circulation circuit in which a refrigerant circulates. The cooling / heating device releases the heat of the indoor air to the outside air through the circulation circuit during the cooling operation to lower the room temperature, and takes the heat of the outside air into the room through the circulation circuit during the heating operation to increase the room temperature. .
Further, for indoor ventilation, a desiccant ventilator having a humidity adjusting function can be used, and specific examples of installing a cooling / heating device and a desiccant ventilator to adjust the temperature and ventilate a room are disclosed in Patent Documents 1 and 2. It is described in.

In recent years, some desiccant ventilators can adjust the temperature in addition to adjusting the humidity, and a specific example is described in Patent Document 3.
In the desiccant ventilator (ventilator) of Patent Document 3, a heat exchanger is provided in the air supply path, and the desiccant element is used between the outside air flowing in the air supply path toward the room and the room air flowing in the exhaust path outward. Move moisture.
The outside air flowing through the air supply path is cooled by a heat exchanger that functions as an evaporator during cooling and dehumidifying operation, then dehumidified through a desiccant element and flows into the room, and functions as a condenser during heating and moisturizing operation. After being warmed by the heat exchanger, it is humidified by the desiccant element and flows into the room.

JP 2003-262360 A JP 2010-255970 A JP 2002-81688 A

However, in Patent Documents 1 and 2, the cooling / heating device and the desiccant ventilation device are independent from each other. When the desiccant ventilation device has a cooling / heating function, cooling is performed by one of the cooling / heating device or the desiccant ventilation device and heating is performed by the other. As a result, there is a problem that the amount of electric power consumed for adjusting the temperature in the room increases.
This invention is made | formed in view of this situation, and aims at provision of the air-conditioning installation which avoids that an inefficient temperature adjustment is performed with a cooling / heating apparatus and a desiccant ventilation apparatus.

The air conditioning equipment according to the present invention that meets the above object is a cooling operation for cooling the outside air taken into the room while moving moisture between the indoor air released to the outside using a desiccant rotor and the outside air taken into the room, or The desiccant ventilator comprising: a desiccant ventilator that performs a heating operation for warming outside air to be taken into a room; and an air conditioner that cools and heats the room by circulating a refrigerant in a circulation circuit that connects the indoor unit and the outdoor unit. The control means to which the apparatus and the air conditioning apparatus are signal-connected is provided, and the control means simultaneously performs the heating operation by the desiccant ventilation apparatus and the cooling operation by the air conditioning apparatus, and the cooling operation by the desiccant ventilation apparatus and the air conditioning. to avoid performing the heating operation by the device at the same time, avoiding inefficient temperature control to the chamber, the desiccant ventilation When the cooling / heating device performs cooling operation with priority over the heating operation of the desiccant ventilation device, and when the cooling / heating device performs heating operation with priority over the cooling operation of the desiccant ventilation device, The control unit detects that the cooling operation of the cooling / heating device, which has been performed preferentially, has stopped or has been switched to the heating operation. In this case, the desiccant ventilator that had stopped the heating operation is started to perform the heating operation, and the heating operation of the cooling / heating apparatus that has been performed with priority has been stopped or switched to the cooling operation. When this is detected, the desiccant ventilator that has stopped the cooling operation is caused to start the cooling operation .

In the air conditioning equipment according to the present invention, the control means causes the cooling / heating device to perform cooling operation in preference to the heating operation of the desiccant ventilation device, and to perform heating operation in preference to the cooling operation of the desiccant ventilation device. Can be done.

In the air-conditioning equipment according to the present invention, the control means, according to a predetermined setting, prioritizes a heating operation of the desiccant ventilation device and a cooling operation of the air conditioning device, a cooling operation of the desiccant ventilation device, and The priority operation among the heating operations of the air conditioner can be determined.

In the air conditioning equipment according to the present invention, the control means avoids performing the heating operation by the desiccant ventilation device and the cooling operation by the air conditioning device at the same time, and simultaneously performing the cooling operation by the desiccant ventilation device and the heating operation by the air conditioning device. The desiccant ventilator and the air conditioner can avoid the conflicting operation of the indoor temperature adjustment, and can suppress the amount of power consumed for the temperature adjustment.

In the air conditioning equipment according to the present invention, when the control unit causes the cooling / heating device to perform cooling operation in preference to the heating operation of the desiccant ventilation device, and to perform the heating operation in preference to the cooling operation of the desiccant ventilation device, It is possible to reliably avoid a situation where one of the desiccant ventilator and the air conditioner performs an operation for increasing the indoor temperature and the other performs an operation for decreasing the indoor temperature.
In addition, since the desiccant ventilator is generally inferior in the temperature adjustment capability of the room as compared with the air conditioner, it is possible to efficiently adjust the temperature of the room by giving priority to the operation of the air conditioner.

In the air conditioning equipment according to the present invention, when the control means determines a priority operation among the operation of the desiccant ventilator and the operation of the air conditioning apparatus according to a predetermined setting, the user depends on the usage status of the air conditioning equipment. The priority operation can be easily changed.

Air conditioning equipment according to the present invention, the desiccant ventilator, when performing the cooling operation air conditioning apparatus in preference to heating operation of the desiccant, and when the air conditioner performs a heating operation in preference to cooling operation of the desiccant, since the ventilation operation which does not give a temperature change in outside air taken into the indoor, even when stopping the cooling operation and heating operation of the desiccant ventilator, it is possible to perform replacement of indoor air.

It is a block diagram of the air-conditioning equipment which concerns on one embodiment of this invention. It is explanatory drawing of the air conditioning apparatus used for the air conditioning equipment. It is explanatory drawing of the desiccant ventilation apparatus used for the air conditioning equipment.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
As shown in FIGS. 1 to 3, the air conditioner 10 according to an embodiment of the present invention uses a desiccant rotor 11 to move moisture between indoor air released outdoors and outside air taken into the room. The refrigerant is circulated through a desiccant ventilator 12 that performs a cooling operation for cooling the outside air taken into the room or a heating operation for warming the outside air taken into the room, and a circulation circuit 15 that connects the indoor unit 13 and the outdoor unit 14 to cool and cool the room. It has the air-conditioning apparatus 16 to perform. Details will be described below.

As shown in FIG. 1, the desiccant ventilation device 12 and the air conditioning / heating device 16 are signal-connected via the control means 17. The control means 17 can detect the operation mode of the desiccant ventilation device 12 and the operation mode of the air conditioning device 16, and can transmit a command signal for stopping or starting the operation to the desiccant ventilation device 12 and the air conditioning device 16. .
In addition, the control means 17 is provided with the communication port corresponding to the microcomputer in which the program is mounted, the desiccant ventilation apparatus 12, and the air conditioning apparatus 16, respectively.

As shown in FIG. 2, the air conditioner 16 cools the compressor 18 provided in the outdoor unit 14 , the outdoor heat exchanger 19, the expansion valve 20, and the indoor heat exchanger 21 provided in the indoor unit 13. Are connected by a circulation circuit 15 circulating.
In addition to the indoor heat exchanger 21, the indoor unit 13 includes a cross flow fan 22 that takes in indoor air into the housing of the indoor unit 13. The air taken into the housing of the indoor unit 13 by the cross flow fan 22 passes through the indoor heat exchanger 21 and is subjected to heat exchange, and then released from the housing of the indoor unit 13 into the room.
In this embodiment, Freon R410A is used as the refrigerant, but other refrigerants can also be used.

The outdoor unit 14 is installed outdoors, and the outdoor heat exchanger 19 performs heat exchange between the refrigerant circulating in the circulation circuit 15 and the outside air.
The outdoor heat exchanger 19, the compressor 18, and the expansion valve 20 are disposed in the casing of the outdoor unit 14, and the compressor 18, the outdoor heat exchanger 19, the expansion valve 20, and the indoor heat exchanger 21 constitute a heat pump cycle. Has been.
The control means 17 incorporates an inverter, and the operating frequency (rotation speed) of the compressor 18 changes according to the output value of the inverter, and adjusts the pressure of the refrigerant discharged from the compressor 18.

The flow rate of the refrigerant passing through the expansion valve 20 is changed by adjusting the opening degree of the expansion valve 20. The expansion valve 20 adjusts the flow rate of the refrigerant by adjusting the opening degree so that the cooling / heating capacity with respect to the unit power consumption of the compressor 18, that is, COP (Coefficient of Performance) is maintained at a high level.
The circulation circuit 15 is attached with a four-way valve 23 for switching the direction of the refrigerant flowing through the circulation circuit 15.

During the cooling operation, the four-way valve 23 enters a state in which the refrigerant discharged from the outdoor heat exchanger 19 passes through the expansion valve 20 and the indoor heat exchanger 21 in order and then returns to the outdoor heat exchanger 19 through the compressor 18. .
By setting the four-way valve 23 in such a state, the gaseous refrigerant whose pressure has been increased by the compressor 18 condenses while passing through the outdoor heat exchanger 19, and releases condensation heat to the outside air. To reduce the pressure. The refrigerant decompressed by the expansion valve 20 evaporates when passing through the indoor heat exchanger 21 and lowers the temperature of the indoor air taken into the housing of the indoor unit 13. Therefore, the air released from the casing of the indoor unit 13 into the room is lower than the room temperature, and the room can be cooled.

On the other hand, during the heating operation, the four-way valve 23 returns to the outdoor heat exchanger 19 through the expansion valve 20 after the refrigerant from the outdoor heat exchanger 19 sequentially passes through the compressor 18 and the indoor heat exchanger 21. become. As a result, the liquid refrigerant decompressed by the expansion valve 20 is sent to the outdoor heat exchanger 19 and absorbs the heat of the outside air to evaporate. After the pressure is increased by the compressor 18, the refrigerant is condensed in the indoor heat exchanger 21. Then warm the indoor air.

Further, the outdoor unit 14 is provided with a propeller fan 24 that promotes heat exchange between the refrigerant and the outside air in the outdoor heat exchanger 19.
The outdoor unit 14 and the indoor unit 13 are connected via a circulation circuit 15, and two opening / closing valves 25 provided in the circulation circuit 15 are attached to the casing of the outdoor unit 14. The on-off valve 25 is normally open and is closed during maintenance.

As shown in FIG. 3, the desiccant ventilator 12 that is signal-connected to the air conditioner 16 and the control means 17 includes an air supply path 27 that takes in outside air into the casing 26 and an exhaust path that discharges indoor air. 28 is formed.
The desiccant ventilator 12 includes a desiccant rotor 11 that moves moisture from the high relative humidity side of the air supply path 27 and the exhaust path 28 to the low side, outside air that flows through the air supply path 27, and indoor air that flows through the exhaust path 28. The sensible heat exchange rotor 30 that performs heat exchange between the two is provided.
In addition, the air supply passage 27 is provided with two heat exchangers 31 and 32 and a fan 33 that sends outdoor outdoor air to the room. The exhaust passage 28 also has two heat exchangers 34 and 35 and indoor air to the outside. A fan 36 is provided.

The desiccant rotor 11 has a disk shape, is disposed so as to block the air supply passage 27 and the exhaust passage 28, and has a surface covered with a hygroscopic material. The desiccant rotor 11 rotates slowly by power applied from a known electric motor, absorbs moisture from the air having a higher relative humidity in the air flowing through the air supply path 27 (outside air) and the air flowing through the exhaust path 28, The absorbed moisture is released to the air with the lower relative humidity.
Note that zeolite or silica gel can be used as the moisture absorbent attached to the surface of the desiccant rotor 11. Further, the hygroscopic material can be repeatedly used (that is, the water can be adsorbed) by releasing the moisture adsorbed on the hygroscopic material by being heated.

The sensible heat exchange rotor 30 is also disk-shaped, and is disposed downstream of the desiccant rotor 11 along the flow of air (outside air) traveling from the outside toward the room from the outside. It is installed so as to block the road 28.
The sensible heat exchange rotor 30 rotates slowly using a known electric motor as a power source, absorbs heat from the higher temperature side in the air flowing through the air supply path 27 and the air flowing through the exhaust path 28, and dissipates heat to the lower temperature side. .

Each of the heat exchangers 31, 32, 34, and 35 has a conduit through which a refrigerant formed of a metal having excellent thermal conductivity (copper in the present embodiment) flows, and the conduit is covered with aluminum. The heat exchanger 31 (the same applies to the heat exchangers 32, 34, and 35) has fins formed on the surface to increase the surface area, and between the air passing through the heat exchanger 31 and the refrigerant flowing through the conduit. To improve the efficiency of heat exchange.

The heat exchanger 31 is disposed on the upstream side of the desiccant rotor 11 and the heat exchanger 32 is disposed on the downstream side of the sensible heat exchange rotor 30 along the flow of air traveling through the air supply path 27 into the room.
The heat exchanger 34 is provided between the sensible heat exchange rotor 30 and the desiccant rotor 11, and the heat exchanger 35 is downstream of the desiccant rotor 11 along the flow of air that travels through the exhaust path 28 from the room to the outdoors. Arranged on the side.

The heat exchangers 31 and 35 are connected by a circulation circuit (not shown) filled with a refrigerant, and by circulating the refrigerant through the circulation circuit, one functions as a condenser and the other functions as an evaporator. The circulation circuit is provided with a compressor that circulates the refrigerant and a well-known four-way valve that reverses the flow direction of the refrigerant that circulates in the circulation circuit, and which of the heat exchangers 31 and 35 functions as a condenser It is determined by the flow direction of the refrigerant circulating in the circuit.
The heat exchangers 32 and 34 also have the same relationship as that of the heat exchangers 31 and 35, one functioning as a condenser and the other functioning as an evaporator.

Below, operation | movement of the desiccant ventilation apparatus 12 is demonstrated.
When performing indoor dehumidification, the heat exchangers 31 and 32 function as an evaporator, and the heat exchangers 34 and 35 function as a condenser.
The outside air taken into the air supply path 27 from the outside by the operation of the fan 33 is cooled by the heat exchanger 31 and dehumidified when passing through the desiccant rotor 11, and then the sensible heat exchange rotor 30 and the heat exchanger 32 are passed through. It passes through in order and is further cooled and flows into the room.
Therefore, when dehumidifying the room, the air cooled through the air supply path 27 is supplied to the room, and the desiccant ventilator 12 performs a cooling operation in addition to dehumidification.

Then, the indoor air sucked into the exhaust passage 28 from the room by the operation of the fan 36 passes through the sensible heat exchange rotor 30 and the heat exchanger 34 in order, and then rises in temperature. It passes and is discharged outdoors.
The desiccant rotor 11 rotates, and the portion that has absorbed moisture in the air supply passage 27 moves to the exhaust passage 28. And the part which absorbed the water | moisture content of the desiccant roller 11 hits the air heated by the sensible heat exchange rotor 30 and the heat exchanger 34 in the exhaust path 28, and discharge | releases a water | moisture content. Accordingly, the desiccant rotor 11 is in a dry state in which the portions that have passed through the exhaust passage 28 can absorb moisture sequentially.

On the other hand, when performing indoor moisture retention, the heat exchangers 31 and 32 function as a condenser, and the heat exchangers 34 and 35 function as an evaporator.
The outside air taken into the air supply path 27 from the outside by the operation of the fan 33 is warmed by the heat exchanger 31 and given moisture when passing through the desiccant rotor 11, and then the sensible heat exchange rotor 30 and the heat exchanger. Passing through 32 in order, the temperature rises and flows into the room.
Therefore, when the room is moisturized, the warmed air is supplied to the room through the air supply path 27, and the desiccant ventilator 12 performs the heating operation in addition to the moisturization.

Then, the indoor air sucked into the exhaust path 28 from the room by the operation of the fan 36 passes through the sensible heat exchange rotor 30 and the heat exchanger 34 in order and decreases in temperature, and then the desiccant rotor 11 and the heat exchanger 35. Is discharged to the outdoors.
In the desiccant rotor 11, the portion that has absorbed moisture in the exhaust passage 28 moves to the air supply passage 27, and the portion that has absorbed the moisture is warmed by the heat exchanger 31 in the air supply passage 27 and supplied. Water is released into the airway 27. Moisture released into the air supply path 27 flows into the room along with the outside air flowing from the outside into the room through the air supply path 27, and the indoor humidity can be maintained.

Here, as shown in FIG. 1, the desiccant ventilator 12 and the air conditioner 16 are provided with controllers 37 and 38 for performing operation mode switching operations, respectively, and the user operates the controller 37 of the desiccant ventilator 12. Thus, the operation mode of the desiccant ventilation device 12 can be switched, and the operation mode of the air conditioning device 16 can be switched by operating the controller 38 of the air conditioning device 16.
Therefore, the desiccant ventilation device 12 and the cooling / heating device 16 can be operated to perform contradictory operations related to indoor temperature adjustment, one of which increases the indoor temperature and the other decreases the indoor temperature.

Therefore, if the desiccant ventilator 12 and the air conditioner 16 are operated according to the operations performed by the controllers 37 and 38, respectively, the desiccant ventilator 12 and the air conditioner 16 perform an operation contrary to the adjustment of the room temperature. As a result, the amount of power consumed for room temperature adjustment increases.
Therefore, the control means 17 performs control to avoid performing the heating operation by the desiccant ventilation device 12 and the cooling operation by the air conditioning device 16 at the same time, and avoiding simultaneously performing the cooling operation by the desiccant ventilation device 12 and the heating operation by the air conditioning device 16. Do.

The control means 17 can detect the operation mode currently performed by the desiccant ventilator 12 and the air conditioner 16 respectively, and the input operation performed by the user on the controller 37 of the desiccant ventilator 12 and the controller of the air conditioner 16 by the user. It is possible to detect the input operation performed on the control unit 38.

When the controller 17 detects that the controller 38 of the air conditioner 16 has performed an input operation for starting the cooling operation while the desiccant ventilator 12 is performing the heating operation, the controller 17 performs the heating operation of the desiccant ventilator 12. The cooling / heating device 16 is caused to perform the cooling operation in preference to the heating operation of the desiccant ventilation device 12. The desiccant ventilator 12 that has stopped the heating operation stops the desiccant rotor 11 and the sensible heat exchange rotor 30, and also stops the compressor (not shown), and the refrigerant in the circulation circuit that connects the heat exchangers 31 and 35. Only the fans 33 and 36 are operated with the circulation of the refrigerant and the circulation of the refrigerant in the circulation circuit connecting the heat exchangers 32 and 34 stopped. Therefore, the desiccant ventilator 12 is in a state of performing a ventilation operation that does not change the temperature of the outside air taken into the room.
Then, when it is detected that the cooling operation of the air conditioning device 16 has stopped, or when it is detected that the operation mode of the air conditioning device 16 has been switched from the cooling operation to the heating operation, the control means 17 causes the desiccant ventilation device 12 to Start heating operation.

Further, when the control means 17 detects that the controller 38 of the air conditioning apparatus 16 has performed an input operation for starting the heating operation while the desiccant ventilation apparatus 12 is performing the cooling operation, the cooling operation of the desiccant ventilation apparatus 12 is performed. And the air conditioning apparatus 16 is caused to perform the heating operation in preference to the cooling operation of the desiccant ventilation apparatus 12. The desiccant ventilator 12 that has stopped the cooling operation is in a state in which only the fans 33 and 36 are operated to perform a ventilation operation that does not change the temperature of the outside air taken into the room.
When it is detected that the heating operation of the air conditioner 16 has stopped, or when it is detected that the operation mode of the air conditioner 16 has been switched from the heating operation to the cooling operation, the control means 17 Start cooling operation.

In this way, in the desiccant ventilation device 12 and the cooling / heating device 16, by avoiding a conflicting operation regarding indoor temperature adjustment, inefficient temperature adjustment for the room can be avoided, and indoor temperature adjustment It is possible to suppress the amount of power consumed for the purpose.
In addition, the desiccant ventilator 12 gives priority to the operation of the air conditioner 16 to indicate that the operation has been stopped or that the operation has not been started by generating a beep sound, lighting the lamp, or on the controller 37. It is also possible to make a design that informs by displaying.

In the present embodiment, the control means 17 is loaded with a program that always prioritizes the operation of the desiccant ventilator 12 in the operation of the air conditioner 16, but the operation of the desiccant ventilator 12 and the operation of the air conditioner 16. Of these, one of the priority operations may be changed by setting.
In this case, the control means 17 performs the priority operation in the heating operation of the desiccant ventilation device 12 and the cooling operation of the air conditioning device 16 according to the predetermined setting, the cooling operation of the desiccant ventilation device 12 and the heating operation of the air conditioning device 16. The priority operation is determined, and the conflicting operation between the desiccant ventilator 12 and the air conditioner 16 is avoided regarding the indoor temperature adjustment.
In addition, the control means 17 can be attached in the housing | casing (casing 26) of the desiccant ventilation apparatus 12, the housing | casing of the indoor unit 13, or the housing | casing of the outdoor unit 14. FIG.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and all changes in conditions and the like that do not depart from the gist are within the scope of the present invention.
For example, the number of heat exchangers provided in the desiccant ventilation device is not limited to four, and may be two, and the number of desiccant rotors is not limited to one, and may be two.
Moreover, the type in which floor heating and floor cooling are possible can also be used for an air conditioning apparatus.

10: air conditioning equipment, 11: desiccant rotor, 12: desiccant ventilator, 13: indoor unit, 14: outdoor unit, 15: circulation circuit, 16: air conditioning unit, 17: control means, 18: compressor, 19: outdoor heat Exchanger, 20: Expansion valve, 21: Indoor heat exchanger, 22: Cross flow fan, 23: Four-way valve, 24: Propeller fan, 25: Open / close valve, 26: Casing, 27: Air supply path, 28: Exhaust path , 30: sensible heat exchange rotor, 31, 32: heat exchanger, 33: fan, 34, 35: heat exchanger, 36: fan, 37, 38: controller

Claims (3)

A desiccant that performs a cooling operation for cooling the outside air taken into the room or a heating operation for warming the outside air taken into the room while moving moisture between the room air discharged outdoors using the desiccant rotor and the outside air taken into the room. In an air conditioning facility having a ventilation device and an air conditioning device that circulates a refrigerant in a circulation circuit that connects the indoor unit and the outdoor unit to cool and heat the room,
The desiccant ventilator and the cooling / heating device are provided with control means to which signals are connected. The control means simultaneously performs heating operation by the desiccant ventilator and cooling operation by the air conditioning device, and cooling operation by the desiccant ventilator. And avoiding performing the heating operation by the air conditioning apparatus at the same time, avoiding inefficient temperature adjustment for the room ,
The desiccant ventilation device is used when the cooling / heating device performs cooling operation in preference to the heating operation of the desiccant ventilation device, and when the cooling / heating device performs heating operation in preference to the cooling operation of the desiccant ventilation device. , Perform ventilation operation that does not give a temperature change to the outside air taken into the room,
The desiccant ventilation that has stopped the heating operation when the control means detects that the cooling operation of the cooling and heating apparatus that has been performed preferentially has stopped or has been switched to the heating operation. When the heating operation of the cooling and heating apparatus that was performed preferentially was started, or when it was detected that the apparatus was switched to cooling operation, the cooling operation was stopped. An air conditioning system characterized by causing a desiccant ventilator to start a cooling operation . 2. The air conditioning equipment according to claim 1, wherein the control unit causes the cooling / heating device to perform a cooling operation in preference to a heating operation of the desiccant ventilation device, and to perform a heating operation in preference to a cooling operation of the desiccant ventilation device. An air conditioning system characterized by 2. The air conditioning equipment according to claim 1, wherein the control means prioritizes a heating operation of the desiccant ventilation device and a cooling operation of the air conditioning device according to a predetermined setting, and a cooling operation of the desiccant ventilation device. And an air conditioning system that determines a priority operation among the heating operations of the air conditioner.

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