CN113574328B - Air conditioner and air conditioning system - Google Patents
Air conditioner and air conditioning system Download PDFInfo
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- CN113574328B CN113574328B CN202080021897.XA CN202080021897A CN113574328B CN 113574328 B CN113574328 B CN 113574328B CN 202080021897 A CN202080021897 A CN 202080021897A CN 113574328 B CN113574328 B CN 113574328B
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- temperature
- indoor
- heat exchanger
- dehumidification operation
- trunk
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/56—Remote control
- F24F11/58—Remote control using Internet communication
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
Abstract
The air conditioner is provided with a refrigerant circuit, a control unit (100), a 1 st temperature sensor (52) for detecting the temperature of indoor air, and a 2 nd temperature sensor (54) for detecting the temperature of a trunk defining an indoor space. A control unit (100) controls the refrigerant circuit to perform a 1 st dehumidification operation in which substantially all of the indoor heat exchanger is in the evaporation region, and a 2 nd dehumidification operation in which a part of the indoor heat exchanger is in the evaporation region. The control unit (100) selects one of the 1 st dehumidification operation and the 2 nd dehumidification operation using the temperature of the indoor air and the temperature of the trunk.
Description
Technical Field
The present invention relates to an air conditioner and an air conditioning system.
Background
Conventionally, as an air conditioner, there is an air conditioner that performs a plurality of dehumidification operations having different sensible heat capacities, as disclosed in patent document 1.
Documents of the prior art
Patent literature
Patent document 1: japanese patent laid-open publication No. 2004-108618
Disclosure of Invention
Problems to be solved by the invention
In the above-described conventional air conditioner, when dehumidifying indoor air, one of a plurality of dehumidification operations may be improperly selected and performed. Therefore, there is a problem that operation switching frequently occurs.
The invention provides an air conditioner and an air conditioning system capable of reducing operation switching during indoor air dehumidification.
Means for solving the problems
The air conditioner of the invention comprises: a refrigerant circuit having a compressor, an outdoor heat exchanger, an indoor heat exchanger, and an adjustment mechanism for adjusting the size of an evaporation region of the indoor heat exchanger; a control unit; a 1 st temperature sensor that detects a temperature of indoor air; and a 2 nd temperature sensor that detects a temperature of a trunk that defines an indoor space, wherein the control unit controls the refrigerant circuit to perform a 1 st dehumidification operation in which substantially all of the indoor heat exchanger is set to an evaporation region and a 2 nd dehumidification operation in which a part of the indoor heat exchanger is set to an evaporation region, and wherein the control unit selects one of the 1 st dehumidification operation and the 2 nd dehumidification operation using the temperature of the indoor air and the temperature of the trunk.
According to the above configuration, when one of the 1 st dehumidification operation and the 2 nd dehumidification operation is selected, not only the temperature of the indoor air but also the temperature of the trunk is used, and therefore, the adequacy of the selection can be improved. Therefore, operation switching can be reduced when the indoor air is dehumidified.
In one aspect of the air conditioner, the controller selects the 1 st dehumidification operation when a difference between the temperature of the indoor air and the temperature of the trunk is greater than a preset 1 st threshold and a difference between the temperature of the indoor air and a preset temperature is less than a preset 2 nd threshold.
According to the above aspect, the 1 st dehumidification operation is selected when the difference between the temperature of the indoor air and the temperature of the trunk is greater than the 1 st threshold and the difference between the temperature of the indoor air and the set temperature is less than the 2 nd threshold. Therefore, when the difference between the temperature of the indoor air and the set temperature is smaller than the 2 nd threshold, the 1 st dehumidification operation can be selected more appropriately.
In one aspect of the air conditioner, the controller selects the 1 st dehumidification operation when a difference between the temperature of the indoor air and the temperature of the trunk is greater than the 1 st threshold and a difference between the temperature of the indoor air and the set temperature is greater than or equal to the 2 nd threshold.
According to the above aspect, the 1 st dehumidification operation is selected when the difference between the temperature of the indoor air and the temperature of the trunk is greater than the 1 st threshold and the difference between the temperature of the indoor air and the set temperature is equal to or greater than the 2 nd threshold. Therefore, a large heat load corresponding to the difference between the indoor air temperature and the set temperature can be effectively handled.
In an aspect of the air conditioner, the adjustment mechanism includes an expansion mechanism provided in a refrigerant path between the outdoor heat exchanger and the indoor heat exchanger, and a control valve provided in a middle of the refrigerant path of the indoor heat exchanger, and the 2 nd dehumidification operation includes: a 3 rd dehumidification operation in which a part of the indoor heat exchanger is set to an evaporation region and the remaining part of the indoor heat exchanger is set to a superheat region; and a 4 th dehumidification operation in which a portion of the indoor heat exchanger on an upstream side of the control valve is set to a condensation region, and a portion of the indoor heat exchanger on a downstream side of the control valve is set to an evaporation region.
According to the above aspect, since the 2 nd dehumidification operation includes the 3 rd and 4 th dehumidification operations, it is possible to handle a relatively small and large heat load by the 3 rd dehumidification operation and a relatively small heat load by the 4 th dehumidification operation.
In one embodiment of the air conditioner, the temperature of the trunk is an average temperature calculated using a temperature of at least one of a wall, a floor, and a ceiling in the room.
According to the above aspect, one of the 1 st dehumidification operation, the 2 nd dehumidification operation, and the 3 rd dehumidification operation can be appropriately selected by using the average temperature calculated using the temperature of at least one of the wall, the floor, and the ceiling of the room.
The air conditioning system of the present invention comprises: a refrigerant circuit having a compressor, an outdoor heat exchanger, an indoor heat exchanger, and an adjustment mechanism for adjusting the size of an evaporation area of the indoor heat exchanger; a control unit; a 1 st temperature sensor for detecting a temperature of indoor air; and a 2 nd temperature sensor that detects a temperature of a trunk that defines an indoor space, wherein the control unit controls the refrigerant circuit to perform a 1 st dehumidification operation in which substantially all of the indoor heat exchanger is set to an evaporation region, and a 2 nd dehumidification operation in which a part of the indoor heat exchanger is set to an evaporation region, and wherein the control unit selects one of the 1 st dehumidification operation and the 2 nd dehumidification operation using the temperature of the indoor air and the temperature of the trunk.
According to the above configuration, when one of the 1 st dehumidification operation and the 2 nd dehumidification operation is selected, not only the temperature of the indoor air but also the temperature of the trunk is used, and therefore, the adequacy of the selection can be improved. Therefore, operation switching can be reduced when the indoor air is dehumidified.
In an air conditioning system according to one aspect, the control unit selects the 1 st dehumidification operation when a difference between the temperature of the indoor air and the temperature of the trunk is greater than a preset 1 st threshold value and a difference between the temperature of the indoor air and a set temperature is less than a preset 2 nd threshold value.
According to the above aspect, the 1 st dehumidification operation is selected when the difference between the temperature of the indoor air and the temperature of the trunk is greater than the 1 st threshold and the difference between the temperature of the indoor air and the set temperature is less than the 2 nd threshold. Therefore, when the difference between the temperature of the indoor air and the set temperature is smaller than the 2 nd threshold, the 1 st dehumidification operation can be selected more appropriately.
In an air conditioning system according to one aspect, the control unit selects the 1 st dehumidification operation when a difference between the temperature of the indoor air and the temperature of the trunk is greater than the 1 st threshold and a difference between the temperature of the indoor air and the set temperature is greater than or equal to the 2 nd threshold.
According to the above aspect, the 1 st dehumidification operation is selected when the difference between the temperature of the indoor air and the temperature of the trunk is greater than the 1 st threshold and the difference between the temperature of the indoor air and the set temperature is equal to or greater than the 2 nd threshold. Therefore, a large heat load corresponding to the difference between the indoor air temperature and the set temperature can be effectively handled.
In an air conditioning system of one aspect, the adjustment mechanism includes an expansion mechanism provided in a refrigerant path between the outdoor heat exchanger and the indoor heat exchanger, and a control valve provided in a middle of the refrigerant path of the indoor heat exchanger, and the 2 nd dehumidification operation includes: a 3 rd dehumidification operation in which a part of the indoor heat exchanger is set to an evaporation region and the remaining part of the indoor heat exchanger is set to a superheating region; and a 4 th dehumidification operation in which a portion of the indoor heat exchanger on an upstream side of the control valve is set to a condensation region, and a portion of the indoor heat exchanger on a downstream side of the control valve is set to an evaporation region.
According to the above aspect, since the 2 nd dehumidification operation includes the 3 rd and 4 th dehumidification operations, it is possible to handle a relatively small and large heat load by the 3 rd dehumidification operation and a relatively small heat load by the 4 th dehumidification operation.
In one embodiment of the air conditioning system, the temperature of the trunk is an average temperature calculated using a temperature of at least one of a wall, a floor, and a ceiling in the room.
According to the above aspect, one of the 1 st dehumidification operation, the 2 nd dehumidification operation, and the 3 rd dehumidification operation can be appropriately selected by using the average temperature calculated using the temperature of at least one of the wall, the floor, and the ceiling of the room.
An air conditioning system according to one embodiment includes: an air conditioner; and a server capable of communicating with the air conditioner via a power communication network, wherein the refrigerant circuit and the 1 st temperature sensor are provided in the air conditioner, and the control unit is provided in the server.
According to the above aspect, by providing the control unit to the server, the air conditioner can be controlled from the outside to perform the 1 st dehumidification operation or the 2 nd dehumidification operation.
In an air conditioning system according to one aspect, the 2 nd temperature sensor is provided in the indoor space outside the air conditioner, and the air conditioner receives the signal indicating the temperature of the trunk unit from the 2 nd temperature sensor via the power communication network and the server, or directly receives the signal indicating the temperature of the trunk unit without via the power communication network and the server.
According to the above aspect, since the 2 nd temperature sensor is provided in the indoor space outside the air conditioner, the air conditioner can be caused to perform the 1 st dehumidification operation or the 2 nd dehumidification operation even if the air conditioner does not have a function of detecting the temperature of the trunk.
Further, since the air conditioner receives a signal indicating the temperature of the trunk from the 2 nd temperature sensor via the power communication network and the server, the server can grasp the temperature of the trunk.
Further, since the air conditioner directly receives the signal indicating the temperature of the trunk from the 2 nd temperature sensor without passing through the power communication network and the server, the air conditioner can receive the signal indicating the temperature of the trunk regardless of the states of the power communication network and the server.
An air conditioning system according to one embodiment includes: an air conditioner; and a server which can communicate with the air conditioner via a power communication network, wherein the 2 nd temperature sensor is provided in the indoor space outside the air conditioner, and the air conditioner receives a signal indicating the temperature of the trunk from the 2 nd temperature sensor via the power communication network and the server, or directly receives a signal indicating the temperature of the trunk without via the power communication network and the server.
According to the above aspect, since the 2 nd temperature sensor is provided in the indoor space outside the air conditioner, the air conditioner can be caused to perform the 1 st dehumidification operation or the 2 nd dehumidification operation even if the air conditioner does not have a function of detecting the temperature of the trunk.
Further, since the air conditioner receives a signal indicating the temperature of the trunk from the 2 nd temperature sensor via the power communication network and the server, the server can grasp the temperature of the trunk.
Further, since the air conditioner directly receives the signal indicating the temperature of the trunk from the 2 nd temperature sensor without passing through the power communication network and the server, the air conditioner can receive the signal indicating the temperature of the trunk regardless of the states of the power communication network and the server.
Drawings
Fig. 1 is a circuit diagram of a refrigerant circuit of an air conditioner according to embodiment 1 of the present invention.
Fig. 2 is a control block diagram of the air conditioner.
Fig. 3 is a schematic diagram for explaining the cooling and dehumidifying operation of the air conditioner.
Fig. 4 is a schematic diagram for explaining the over-throttle dehumidifying operation of the air conditioner.
Fig. 5 is a schematic diagram for explaining the reheat dehumidification operation of the air conditioner.
Fig. 6 is a mollier chart relating to the cooling/dehumidifying operation, the over-throttle dehumidifying operation, and the reheat dehumidifying operation of the air conditioner.
Fig. 7 is a diagram for explaining selection of the dehumidifying operation of the air conditioner.
Fig. 8 is a flowchart of control for selecting the dehumidification operation of the air conditioner.
Fig. 9 is a schematic configuration diagram of an air conditioning system according to embodiment 2 of the present invention.
Detailed Description
The air conditioner of the present invention will be described in detail below with reference to the illustrated embodiments.
[ 1 st embodiment ]
Fig. 1 is a circuit diagram of a refrigerant circuit RC included in an air conditioner according to embodiment 1 of the present invention.
The air conditioner includes an indoor unit 1 installed in an indoor space to be air-conditioned and an outdoor unit 2 installed outdoors.
The indoor unit 1 is, for example, a wall-mounted indoor unit attached to an indoor wall surface. The indoor unit 1 includes an indoor heat exchanger 11 and an indoor fan 12 that sends air to the indoor heat exchanger 11.
The main heat exchange portion 11a is composed of a front portion 11a-1 and a rear portion 11 a-2. The front surface portion 11a-1 is located on the indoor user side, and the rear surface portion 11a-2 is located on the opposite side to the indoor user side. In other words, the back surface portion 11a-2 is located on the wall side on which the indoor unit 1 is mounted, and the front surface portion 11a-1 is located on the opposite side of the wall side. The front portion 11a-1 is fluidly connected to the rear portion 11a-2 via refrigerant pipes L1, L2, and the like. Thus, the refrigerant flowing from the expansion valve 24 to the main heat exchange portion 11a flows through the front portion 11a-1 and then flows into the rear portion 11 a-2.
The auxiliary heat exchange portion 11b is provided on the opposite side of the front surface portion 11a-1 of the main heat exchange portion 11a from the back surface portion 11a-2 side of the main heat exchange portion 11 a. In other words, the auxiliary heat exchange portion 11b is located closer to the indoor user than the front portion 11a-1 of the main heat exchange portion 11 a. The volume of the auxiliary heat exchange portion 11b is smaller than the volume of the main heat exchange portion 11 a. The auxiliary heat exchange portion 11b is fluidly connected to the front portion 11a-1 of the main heat exchange portion 11a via a refrigerant pipe L11. Thereby, the refrigerant from the expansion valve 24 side is supplied to the main heat exchange portion 11a via the auxiliary heat exchange portion 11 b. In this way, the auxiliary heat exchange unit 11b can be said to have a refrigerant path between the refrigerant pipe L3 and the refrigerant pipe L11.
As the indoor fan 12, for example, a cross flow fan is used. The cross flow fan blows air whose temperature and the like have been adjusted by the indoor heat exchanger 11 toward the room.
An electromagnetic valve 13 as an example of a control valve is provided in the middle of the refrigerant path of the indoor heat exchanger 11. The electromagnetic valve 13 sets a differential pressure between the front surface portion 11a-1 side of the main heat exchange portion 11a and the rear surface portion 11a-2 side of the main heat exchange portion 11 a. More specifically, the solenoid valve 13 is an on-off valve that can be opened only at 2 positions, i.e., a large opening position and a small opening position, and is turned on when necessary (for example, during a reheat dehumidification operation described later), and is switched from the large opening position to the small opening position.
The indoor unit 1 further includes an indoor heat exchanger temperature sensor 51 that detects the temperature of the indoor heat exchanger 11, an indoor temperature sensor 52 that detects the temperature of the indoor air (hereinafter referred to as "indoor temperature"), an indoor humidity sensor 53 that detects the indoor humidity, and a trunk temperature sensor 54. The indoor temperature sensor 52 is an example of the 1 st temperature sensor. The trunk temperature sensor 54 is an example of the 2 nd temperature sensor.
The trunk temperature sensor 54 detects the temperature of a wall defining the indoor space. As the trunk temperature sensor 54, for example, an infrared sensor or the like that receives infrared rays from the front of the indoor unit 1 (the side opposite to the wall on which the indoor unit 1 is mounted) is used. Here, the wall is one of, for example, 4 walls defining the indoor space, and means a wall (hereinafter referred to as a "front wall") facing a wall on which the indoor unit 1 is installed.
The outdoor unit 2 includes a compressor 21, a four-way switching valve 22, an outdoor heat exchanger 23, an expansion valve 24 as an example of an expansion mechanism, a gas-liquid separator 25, and an outdoor fan 26 that sends air to the outdoor heat exchanger 23. The outdoor unit 2 further includes an outdoor heat exchanger temperature sensor 56 for detecting the temperature of the outdoor heat exchanger 23, an outside air temperature sensor 57 for detecting the outside air temperature, and a refrigerant temperature sensor 58 for detecting the temperature (evaporation temperature) of the refrigerant decompressed by the expansion valve 24.
The outdoor heat exchanger 23 is located upstream of the outdoor fan 26 with respect to the air flow generated by the outdoor fan 26.
The expansion valve 24 is, for example, an electrically operated valve capable of being adjusted to have 3 or more different opening degrees, and the opening degree changes in response to a signal from the control device 100 (shown in fig. 2).
The refrigerant circuit RC of the air conditioner includes the indoor heat exchanger 11, the electromagnetic valve 13, the compressor 21, the four-way switching valve 22, the outdoor heat exchanger 23, the expansion valve 24, the gas-liquid separator 25, and the refrigerant pipes L3 to L9. More specifically, the indoor heat exchanger 11, the compressor 21, the four-way switching valve 22, the outdoor heat exchanger 23, the expansion valve 24, and the gas-liquid separator 25 are fluidly connected by refrigerant pipes L3 to L9. Thereby, the annular refrigerant circuit RC is configured. In this refrigerant circuit RC, the refrigerant circulates at the time of driving of the compressor 21.
The outdoor air temperature sensor 57 is located upstream of the outdoor heat exchanger 23 with respect to the air flow generated by the outdoor fan 26. In other words, when the outdoor fan 26 is driven, the outdoor air before heat exchange with the outdoor heat exchanger 23 passes through the outdoor air temperature sensor 57.
Although not shown, the air conditioner includes a remote controller (hereinafter referred to as a "remote controller"). The user can start or stop the automatic operation, the cooling operation, the heating operation, the dehumidifying operation, and the like by operating the remote controller. The remote controller performs, for example, wireless communication with the indoor unit 1 in response to an operation by a user.
Fig. 2 is a control block diagram of the air conditioner.
The air conditioner includes a control device 100 for controlling the refrigerant circuit RC. More specifically, the control device 100 is constituted by a microcomputer, an input/output circuit, and the like. The control device 100 controls the compressor 21, the four-way switching valve 22, the expansion valve 24, the outdoor fan 26, the indoor fan 12, the electromagnetic valve 13, and the like, based on signals from the indoor heat exchanger temperature sensor 51, the indoor temperature sensor 52, the indoor humidity sensor 53, the trunk temperature sensor 54, the outdoor heat exchanger temperature sensor 56, the outdoor air temperature sensor 57, the refrigerant temperature sensor 58, and the like. The control device 100 is an example of a control unit.
The control device 100 includes a cooling/dehumidifying operation control unit 100a for performing a cooling/dehumidifying operation, an over-throttle dehumidifying operation control unit 100b for performing an over-throttle dehumidifying operation, and a reheat/dehumidifying operation control unit 100c for performing a reheat/dehumidifying operation. The cooling/dehumidifying operation control unit 100a, the over-throttle dehumidifying operation control unit 100b, and the reheating/dehumidifying operation control unit 100c are each configured by software. The cooling and dehumidifying operation is an example of the 1 st dehumidifying operation. The above-described overdriving dehumidification operation and reheating dehumidification operation are examples of the 2 nd dehumidification operation. The over-throttle dehumidification operation is an example of the 3 rd dehumidification operation. The reheat dehumidification operation is an example of the 4 th dehumidification operation.
[ refrigeration and dehumidification operation ]
As shown in fig. 1, the four-way switching valve 22 is switched to the solid line switching position, and the compressor 21 is started, whereby the cooling and dehumidifying operation described above is started. During this cooling and dehumidifying operation, the high-temperature and high-pressure refrigerant discharged from the compressor 21 flows into the outdoor heat exchanger 23 via the four-way switching valve 22. The refrigerant condensed in the outdoor heat exchanger 23 is decompressed by the expansion valve 24, and then flows into the auxiliary heat exchange portion 11b of the indoor heat exchanger 11 and the main heat exchange portion 11a of the indoor heat exchanger 11 in this order. The refrigerant evaporated in the main heat exchange portion 11a and the auxiliary heat exchange portion 11b is returned to the suction side of the compressor 21 via the four-way switching valve 22 and the gas-liquid separator 25. As described above, when the refrigerant circulates through the refrigerant circuit RC, the cooling/dehumidifying operation control unit 100a turns off the solenoid valve 13 while adjusting the frequency of the compressor 21 and the opening degree of the expansion valve 24, thereby causing substantially all of the indoor heat exchanger 11 to be an evaporation region (a hatched region in fig. 3) as shown in fig. 3. As a result, the sensible heat capacity, which is the capacity for changing the indoor temperature, is increased in the cooling and dehumidifying operation.
Here, the setting of substantially all of the indoor heat exchanger 11 as the evaporation region includes not only setting all of the indoor heat exchanger 11 as the evaporation region but also setting only a part of the indoor heat exchanger 11 except a part thereof as the evaporation region. If only this portion (for example, a portion equal to or less than 1/3 of the entire capacity of the indoor heat exchanger 11) does not become the evaporation region, for example, if a portion near the refrigerant outlet of the indoor heat exchanger 11 becomes a superheated region due to an indoor environment or the like, or the like may occur.
[ over-throttling dehumidification operation ]
The over-throttle dehumidifying operation causes the refrigerant to flow in the same direction as that in the cooling dehumidifying operation. At this time, the over-throttle dehumidification operation control portion 100b adjusts the frequency of the compressor 21 and the opening degree of the expansion valve 24, and turns off the electromagnetic valve 13, thereby making the auxiliary heat exchange portion 11b an evaporation region (a region hatched with oblique lines) and making the front surface portion 11a-1 and the rear surface portion 11a-2 of the main heat exchange portion 11a an overheat region (a region hatched with dots), as shown in fig. 4. Therefore, since the sensible heat capacity of the over-throttle dehumidification operation is lower than that of the cooling dehumidification operation, when the heat load in the room is not high or low, the indoor dehumidification can be performed while suppressing a decrease in the room temperature.
The over-throttle dehumidification operation control unit 100b controls the compressor 21 and the expansion valve 24 so that the evaporation region becomes equal to or less than a predetermined volume (for example, 2/3 of the entire volume of the indoor heat exchanger 11) during the over-throttle dehumidification operation.
[ reheat dehumidification operation ]
The reheat dehumidification operation causes the refrigerant to flow in the same direction as that in the cooling dehumidification operation. At this time, the reheat and dehumidification operation control unit 100c adjusts the frequency of the compressor 21 and the opening degree of the expansion valve 24, and turns on the solenoid valve 13, thereby making the auxiliary heat exchange unit 11b and the front surface portion 11a-1 of the main heat exchange unit 11a condensation region (hatched region in a grid), and making the rear surface portion 11a-2 of the main heat exchange unit 11a an evaporation region (hatched region) as shown in fig. 5. Thus, the reheat dehumidification operation has lower sensible heat capacity than the over-throttle dehumidification operation, and thus when the heat load in the room is low, the indoor dehumidification can be performed while suppressing a decrease in the room temperature.
In the reheat dehumidification operation, the solenoid valve 13 is switched to a small opening position. More specifically, the opening degree of the solenoid valve 13 in the reheating and dehumidifying operation corresponds to an opening degree at which the air flow rate is less than 10L/min. The opening degree of the solenoid valve 13 in the reheating and dehumidifying operation is preferably an opening degree corresponding to an air flow rate of 3.5L/min to 5L/min. Here, the phrase "the opening degree of the solenoid valve 13 in the reheating and dehumidifying operation is an opening degree corresponding to an air flow rate of less than 10L/min" does not mean that the air flow rate flowing through the refrigerant circuit RC is less than 10L/min at the opening degree, but means that the air flow rate at the opening degree obtained from the flow rate characteristics of the solenoid valve 13 is less than 10L/min.
Fig. 6 is a mollier chart of the air conditioner during the cooling and dehumidifying operation, the over-throttle dehumidifying operation, and the reheating and dehumidifying operation.
The control of the over-throttle dehumidification operation control unit 100b is performed so that the evaporation temperature in the over-throttle dehumidification operation is lower than the evaporation temperature in the cooling dehumidification operation. At this time, the opening degree of the expansion valve 24 is generally smaller than the opening degree of the expansion valve 24 during the cooling and dehumidifying operation.
The control of the reheat and dehumidification operation control unit 100c is performed in principle so that the evaporation temperature in the reheat and dehumidification operation is lower than the evaporation temperature in the throttle and dehumidification operation. At this time, the opening degree of the expansion valve 24 is fixed to an opening degree larger than the maximum opening degree of the expansion valve 24 during the throttle dehumidification operation.
Fig. 7 is a table for explaining how to select one of the cooling/dehumidifying operation, the over-throttle dehumidifying operation, and the reheat dehumidifying operation when the selected operation is performed.
(1)Y>α2、X<β1
When the difference Y between the indoor temperature and the trunk temperature is greater than the threshold value α 2 and the difference X between the indoor temperature and the set temperature is smaller than the threshold value β 1, the control device 100 selects the cooling/dehumidifying operation.
(2)Y>α2、X>β2
When the difference Y between the indoor temperature and the trunk temperature is greater than the threshold value α 2 and the difference X between the indoor temperature and the set temperature is greater than the threshold value β 2, the control device 100 selects the cooling/dehumidifying operation.
(3)Y>α2、β1≤X≤β2
The control device 100 selects the cooling/dehumidifying operation when the difference Y between the indoor temperature and the temperature of the trunk is greater than the threshold α 2 and the difference X between the indoor temperature and the set temperature is greater than or equal to the threshold β 1 and less than or equal to the threshold β 2.
(4)Y<α1、X<β1
When the difference Y between the indoor temperature and the trunk temperature is smaller than the threshold value α 1 and the difference X between the indoor temperature and the set temperature is smaller than the threshold value β 1, the controller 100 selects the reheat dehumidification operation.
(5)Y<α1、X>β2
The control device 100 selects the cooling and dehumidifying operation when the difference Y between the indoor temperature and the temperature of the trunk is smaller than the threshold α 1 and the difference X between the indoor temperature and the set temperature is larger than the threshold β 2.
(6)Y<α1、β1≤X≤β2
The control device 100 selects the throttle dehumidification operation when the difference Y between the indoor temperature and the trunk temperature is smaller than the threshold α 1 and the difference X between the indoor temperature and the set temperature is equal to or greater than the threshold β 1 and equal to or less than the threshold β 2.
(7)α1≤Y≤α2、X<β1
The control device 100 selects the throttle dehumidification operation when the difference Y between the indoor temperature and the temperature of the trunk is equal to or greater than the threshold α 1 and equal to or less than the threshold α 2, and the difference X between the indoor temperature and the set temperature is less than the threshold β 1.
(8)α1≤Y≤α2、X>β2
The control device 100 selects the cooling/dehumidifying operation when the difference Y between the indoor temperature and the trunk temperature is equal to or greater than the threshold value α 1 and equal to or less than the threshold value α 2, and the difference X between the indoor temperature and the set temperature is greater than the threshold value β 2.
(9)α1≤Y≤α2、β1≤X≤β2
The control device 100 selects the throttle dehumidification operation when the difference Y between the indoor temperature and the temperature of the trunk is equal to or greater than the threshold α 1 and equal to or less than the threshold α 2, and the difference X between the indoor temperature and the set temperature is equal to or greater than the threshold β 1 and equal to or less than the threshold β 2.
Next, control for selecting one of the cooling/dehumidifying operation, the throttled dehumidifying operation, and the reheat dehumidifying operation will be described with reference to the flowchart of fig. 9.
When the control is started, first, in step S1, it is determined whether or not a button for the dehumidification operation of the remote controller is pressed. This step S1 is repeated until it is determined that the button for the dehumidification operation has been pressed.
Next, in step S2, it is determined whether or not the indoor humidity is higher than the set humidity. If it is determined in step S2 that the indoor humidity is higher than the set humidity, the routine proceeds to step S3, and if it is determined that the indoor humidity is not higher than the set humidity, the control ends. The set humidity is set by the manufacturer side before shipment of the air conditioner, as in the case of the set temperature, but the user can change the set humidity using, for example, a remote controller.
Finally, in step S3, the difference X between the indoor temperature and the set temperature is calculated, the difference Y between the indoor temperature and the body temperature is calculated, and then one of the cooling/dehumidifying operation, the over-throttle dehumidifying operation, and the reheat dehumidifying operation is selected based on the difference X, Y. In other words, it is determined in which region of the graph of fig. 7 the difference X, Y falls, and the dehumidification operation corresponding to the region in which the difference X, Y falls is selected.
In this way, when the control device 100 selects one of the cooling/dehumidifying operation, the over-throttling/dehumidifying operation, and the reheating/dehumidifying operation, the control device can improve the adequacy of the selection by considering not only the temperature of the indoor air but also the temperature of the trunk. Therefore, when one of the cooling/dehumidifying operation, the over-throttle dehumidifying operation, and the reheat dehumidifying operation is selected at the time of dehumidifying the indoor air, the number of times of switching the operation can be reduced.
When the difference Y between the indoor temperature and the trunk temperature is greater than the threshold value α 2 and the difference X between the indoor temperature and the set temperature is less than the threshold value β 1, it is determined that the heat load is large, and the cooling and dehumidifying operation is selected. Therefore, when the difference X between the indoor temperature and the set temperature is smaller than the threshold value β 1, the adequacy of selecting the cooling/dehumidifying operation can be improved.
On the other hand, if the difference Y between the indoor temperature and the body temperature is not taken into consideration, the difference X between the indoor temperature and the set temperature is smaller than the threshold β 1, and therefore, it is erroneously determined that the heat load is small, and the reheat dehumidification operation is selected. Here, when the reheat dehumidification operation is selected, the time for the dehumidification operation may be long.
When the difference Y between the indoor temperature and the temperature of the trunk is greater than the threshold value α 2 and the difference X between the indoor temperature and the set temperature is greater than the threshold value β 2, the cooling/dehumidifying operation is selected. Therefore, a large thermal load corresponding to the difference X can be effectively handled.
When the difference Y between the indoor temperature and the temperature of the trunk is greater than the threshold value α 2 and the difference X between the indoor temperature and the set temperature is greater than or equal to the threshold value β 1 and less than or equal to the threshold value β 2, the cooling/dehumidifying operation is selected. Therefore, when the difference X between the indoor temperature and the set temperature is equal to or greater than the threshold value β 1 and equal to or less than the threshold value β 2, the adequacy of selecting the cooling and dehumidifying operation can be improved.
On the other hand, if the difference Y between the indoor temperature and the temperature of the trunk is not considered, the difference X between the indoor temperature and the set temperature is not less than the threshold β 1 and not more than the threshold β 2, and therefore, it is erroneously determined that the heat load is not small or large, and the throttle dehumidification operation is selected. Here, when the over-throttle dehumidifying operation is selected, the time for the dehumidifying operation may be long.
Further, since the air conditioner can perform the over-throttle dehumidification operation and the reheat dehumidification operation in addition to the cooling dehumidification operation, it is possible to handle a relatively small and large heat load by the over-throttle dehumidification operation and a relatively small heat load by the reheat dehumidification operation.
Although the trunk temperature sensor 54 detects the temperature of the wall in front in the above-described embodiment 1, for example, the temperature of a wall to which the indoor unit 1 is attached (hereinafter referred to as "rear wall") or the temperature of a wall that is continuous with the rear wall and is located on the side of the indoor unit 1 (hereinafter referred to as "side wall") may be detected.
In embodiment 1 described above, the control device 100 uses the temperature of the front wall to select one of the cooling dehumidification operation, the over-throttle dehumidification operation, and the reheat dehumidification operation, but may use the temperature of 1 front wall, the temperature of 1 rear wall, and the average temperature of 2 side walls, for example. For example, the average temperature may be determined by dividing the sum of the temperatures of the 4 walls by 4.
Although the trunk temperature sensor 54 detects the temperature of the wall in front in the above-described embodiment 1, the trunk temperature sensor may detect the temperature of the floor defining the indoor space in which the indoor unit 1 is installed. In this case, the average temperature of the floor surface may be calculated from the temperatures of the plurality of locations on the floor surface, and the average temperature may be used when one of the cooling and dehumidifying operation, the over-throttle dehumidifying operation, and the reheating and dehumidifying operation is selected. For example, when the average temperature of the floor surface is calculated from the temperatures of 10 locations on the floor surface, the temperatures of 10 locations on the floor surface may be sequentially detected, and the sum of these temperatures may be divided by 10.
Although the trunk temperature sensor 54 detects the temperature of the wall in front in the above-described embodiment 1, the trunk temperature sensor may detect the temperature of the ceiling defining the indoor space in which the indoor unit 1 is installed. In this case, the average temperature of the ceiling may be calculated from the temperatures of the plurality of portions of the ceiling, and the average temperature may be used when one of the cooling and dehumidifying operation, the over-throttle dehumidifying operation, and the reheating and dehumidifying operation is selected. For example, when the average temperature of the ceiling is calculated from the temperatures of 10 locations on the ceiling, the temperatures of 10 locations on the ceiling may be sequentially detected, and the sum of these temperatures may be divided by 10.
In embodiment 1 described above, the control device 100 uses the temperature of the wall in front when selecting one of the cooling/dehumidifying operation, the over-throttling/dehumidifying operation, and the reheating/dehumidifying operation, but may use an average temperature of at least two of the wall, the floor, and the ceiling defining the indoor space in which the indoor unit 1 is installed.
In embodiment 1 described above, when the button for the dehumidification operation of the remote controller is pressed, one of the cooling dehumidification operation, the over-throttle dehumidification operation, and the reheat dehumidification operation is selected to be performed, but even when the button for the automatic operation of the remote controller is pressed, one of the cooling dehumidification operation, the over-throttle dehumidification operation, and the reheat dehumidification operation may be selected to be performed. Here, the automatic operation means the following operation: one of the cooling operation, the dehumidifying operation, and the heating operation is automatically selected and started according to the indoor temperature, the outdoor temperature, and the like, and then the operation is automatically switched to the other air-conditioning operation.
In embodiment 1 described above, one of the cooling/dehumidifying operation, the over-throttle dehumidifying operation and the reheat/dehumidifying operation is selected, but one of the cooling/dehumidifying operation and the over-throttle dehumidifying operation or one of the cooling/dehumidifying operation and the reheat/dehumidifying operation may be selected. In other words, the present invention can be applied to an air conditioner that can perform the cooling dehumidification operation and the over-throttle dehumidification operation but cannot perform the reheat dehumidification operation, and can also be applied to an air conditioner that can perform the cooling dehumidification operation and the reheat dehumidification operation but cannot perform the over-throttle dehumidification operation. In the case where one of the cooling/dehumidifying operation and the over-throttling dehumidifying operation is selected, the cooling/dehumidifying operation may be selected when the same conditions as the conditions (1) to (3) are satisfied.
By performing such selection, the number of times of switching the operation can be reduced after the cooling/dehumidifying operation or the over-throttling dehumidifying operation is selected when the indoor air is dehumidified.
An air conditioner which can perform the cooling dehumidification operation and the over-throttling dehumidification operation but cannot perform the reheat dehumidification operation may not have a control valve such as the solenoid valve 13. Therefore, the air conditioner can suppress the increase of the manufacturing cost.
When one of the cooling dehumidification operation and the reheating dehumidification operation is selected, the cooling dehumidification operation may be selected when the same conditions as the conditions (1) to (3) are satisfied.
By performing such selection, the number of times of switching the operation can be reduced after the cooling dehumidification operation or the reheat dehumidification operation is selected when the indoor air is dehumidified.
Although the indoor heat exchanger 11 includes the main heat exchange unit 11a and the auxiliary heat exchange unit 11b in embodiment 1, the indoor heat exchanger may include the main heat exchange unit 11a and not include the auxiliary heat exchange unit 11 b. In this case, only a part of the main heat exchange portion 11a may be an evaporation region during the over-throttle dehumidification operation.
In embodiment 1 described above, the electromagnetic valve 13 is provided between the front surface portion 11a-1 of the main heat exchange portion 11a and the rear surface portion 11a-2 of the main heat exchange portion 11a, but an electrically operated valve capable of being adjusted to have an opening degree of 3 or more different from each other may be provided as an example of the control valve. In other words, the same solenoid valve as the expansion valve 24 may be provided as an example of the control valve in the middle of the refrigerant path of the indoor heat exchanger 11.
In embodiment 1 described above, the control device 100 may be configured by an indoor control unit (not shown) on the indoor unit 1 side and an outdoor control unit (not shown) on the outdoor unit 2 side, may be configured by only the indoor control unit, or may be configured by only the outdoor control unit. In other words, the control device 100 may have a part mounted on the indoor unit 1 and the remaining part mounted on the outdoor unit 2, may have all of the parts mounted on the indoor unit 1, and may have all of the parts mounted on the outdoor unit 2.
Although the air conditioner has the control device 100 in the above embodiment 1, the air conditioner may not have the control device 100. In this case, a control device mounted on a device other than an air conditioner or the like may be used as an example of the control unit. However, the air conditioner preferably includes the control device 100, in terms of controlling the air conditioning operation only by the air conditioner, as compared with the case where the air conditioner does not include the control device 100.
Although the air conditioner has the trunk temperature sensor 54 in the above embodiment 1, the trunk temperature sensor 54 may not be provided. In this case, a trunk temperature sensor mounted on a device other than an air conditioner or the like may be used as an example of the 2 nd temperature sensor. However, in comparison with the case where the air conditioner does not include the trunk temperature sensor 54, the air conditioner preferably includes the trunk temperature sensor 54 in order to detect the temperature of the trunk only by the air conditioner.
[ 2 nd embodiment ]
Fig. 9 is a schematic configuration diagram of an air conditioning system according to embodiment 2 of the present invention.
The air conditioning system includes an air conditioner 201, a server 202 capable of communicating with the air conditioner 201, and a communication terminal 203 capable of communicating with the server 202.
Although not shown in fig. 9, the air conditioner 201 includes the refrigerant circuit RC, the indoor temperature sensor 52, the trunk-body temperature sensor 54, and the like of fig. 1, as in the above-described embodiment 1. This air conditioner 201 is configured in the same manner as the air conditioner of embodiment 1 described above, except that it does not include a control device such as the control device 100 (shown in fig. 2) and that it includes the wireless communication module 211.
The wireless communication module 211 performs wireless communication with the wireless access point 204. In more detail, the wireless Communication module 211 is a component that uses a Communication standard such as Wi-Fi (registered trademark), Bluetooth (registered trademark), NFC (Near Field Communication), and transmits and receives signals to and from the server 202 via the wireless access point 204. At this time, communication between the server 202 and the wireless access point 204 is performed via the power communication network 205. The wireless access point 204 is installed in a building having a room air-conditioned by the air conditioner 201. In addition, as an example of the wireless access point 204, there is a wireless LAN (Local Area Network) router.
The server 202 has a control device 221. The control device 221 has the same configuration as the control device 100 (shown in fig. 2), and controls the refrigerant circuit RC of the air conditioner 201. More specifically, the air conditioner 201 receives a signal from the control device 221 via the wireless communication module 211, and thereby performs one of the cooling and dehumidifying operation, the throttled dehumidifying operation, and the reheating and dehumidifying operation. The starting conditions of the cooling/dehumidifying operation, the over-throttle dehumidifying operation, and the reheat dehumidifying operation are the same as those in embodiment 1.
The communication terminal 203 communicates with the server 202 via the power communication network 205, and thereby the air conditioner 201 can be operated from inside and outside the building. As such a communication terminal 203, for example, there is a mobile information terminal such as a smartphone (smartphone), a notebook computer, and a tablet terminal.
The air conditioning system having the above configuration exhibits the same operational advantages as the air conditioner of embodiment 1.
Further, the server 202 has the control device 221, and thus can control the air conditioner 201 from outside the building to cause the air conditioner 201 to perform the cooling dehumidification operation, the over-throttle dehumidification operation, or the reheat dehumidification operation.
Although air conditioner 201 has trunk room temperature sensor 54 in embodiment 2 described above, trunk room temperature sensor 54 may not be provided. In this case, a trunk temperature sensor mounted on a device other than the air conditioner 201 may be used. By using this trunk temperature sensor, the manufacturing cost of the air conditioner 201 can be reduced.
In addition, when trunk temperature sensor 54 is provided in an indoor space outside air conditioner 201, the air conditioner not having the function of detecting the temperature of the trunk can also perform the cooling dehumidification operation, the over-throttle dehumidification operation, or the reheat dehumidification operation.
In the above-described embodiment 2, the air conditioner 201 does not have a control device, and the server 202 has a control device 221, but the air conditioner may have a control device 1 and the server 202 may have a control device 2. In this case, for example, the 1 st control device and the 2 nd control device may cooperate with each other to perform the same operation as the control device 221.
In addition, when air conditioner 201 does not include trunk temperature sensor 54, trunk temperature sensor 54 or a device having trunk temperature sensor 54 mounted thereon may be connected to air conditioner 201 via server 202 to transmit a signal indicating the temperature of a wall or the like to air conditioner 201, or may be directly connected to air conditioner 201 via wireless communication module 211 to transmit a signal indicating the temperature of a wall or the like to air conditioner 201.
When the air conditioner 201 receives a signal indicating the temperature of the trunk from the trunk temperature sensor 54 via the power communication network 205 and the server 202, the server 202 can grasp the temperature of the trunk.
In addition, when the air conditioner 202 directly receives the signal indicating the temperature of the trunk from the trunk temperature sensor 54 without passing through the power communication network 205 and the server 202, the signal indicating the temperature of the trunk can be received regardless of the states of the power communication network 205 and the server 202.
While the present invention has been described with reference to the specific embodiments, the present invention is not limited to the above-described embodiments 1 and 2 and modifications thereof, and can be implemented with various modifications within the scope of the present invention. For example, the embodiment in which the above-described modifications are combined with each other in the 1 st and 2 nd embodiments may be an embodiment of the present invention. Alternatively, an embodiment obtained by combining the contents of embodiment 1 and embodiment 2 described above may be used as an embodiment of the present invention.
Description of the reference symbols
1 indoor machine
2 outdoor machine
11 indoor heat exchanger
11a main body heat exchange part
11a-1 front face
11a-2 back side portion
11b auxiliary heat exchange part
13 solenoid valve
12 indoor fan
21 compressor
22 four-way switching valve
23 outdoor heat exchanger
24 expansion valve
25 gas-liquid separator
26 outdoor fan
51 indoor heat exchanger temperature sensor
52 indoor temperature sensor
53 indoor humidity sensor
54 trunk temperature sensor
56 outdoor heat exchanger temperature sensor
57 outside air temperature sensor
58 refrigerant temperature sensor
100. 221 control device
201 air conditioner
202 server
203 communication terminal
RC refrigerant circuit
Claims (13)
1. An air conditioner, characterized in that the air conditioner comprises:
a Refrigerant Circuit (RC) having a compressor (21), an outdoor heat exchanger (23), an indoor heat exchanger (11), and adjusting means (13, 24) for adjusting the size of the evaporation region of the indoor heat exchanger (11);
a control unit (100);
a 1 st temperature sensor (52) that detects the temperature of the indoor air; and
a 2 nd temperature sensor (54) that detects a temperature of a trunk that defines the indoor space,
the control unit (100) controls the refrigerant circuit to perform a 1 st dehumidification operation in which substantially all of the indoor heat exchanger (11) is brought into an evaporation region, and a 2 nd dehumidification operation in which a part of the indoor heat exchanger (11) is brought into an evaporation region,
the control unit (100) selects one of the 1 st dehumidification operation and the 2 nd dehumidification operation using the temperature of the indoor air and the temperature of the trunk,
the control unit (100) selects the 1 st dehumidification operation when a difference between the temperature of the indoor air and the temperature of the trunk is greater than a preset 1 st threshold value (α 2) and a difference between the temperature of the indoor air and the set temperature is less than a preset 2 nd threshold value (β 1), and selects the 2 nd dehumidification operation when the difference between the temperature of the indoor air and the temperature of the trunk is equal to or less than the 1 st threshold value (α 2) and the difference between the temperature of the indoor air and the set temperature is less than the 2 nd threshold value (β 1).
2. The air conditioner according to claim 1,
the control unit (100) selects the 1 st dehumidification operation when a difference between the temperature of the indoor air and the temperature of the trunk is greater than the 1 st threshold (α 2) and a difference between the temperature of the indoor air and the set temperature is greater than or equal to the 2 nd threshold (β 1).
3. An air conditioner according to claim 1 or 2,
the control unit (100) selects the 1 st dehumidification operation when a difference between the temperature of the indoor air and the temperature of the trunk is equal to or less than the 1 st threshold value (α 2) and a difference between the temperature of the indoor air and a set temperature is greater than a 3 rd threshold value (β 2), the 3 rd threshold value (β 2) being set in advance so as to be greater than the 2 nd threshold value (β 1).
4. An air conditioner according to claim 1 or 2,
the adjustment mechanisms (13, 24) are provided with an expansion mechanism (24) arranged on a refrigerant path between the outdoor heat exchanger (23) and the indoor heat exchanger (11), and a control valve (13) arranged in the middle of the refrigerant path of the indoor heat exchanger (11),
the 2 nd dehumidification operation includes:
a 3 rd dehumidification operation in which a part of the indoor heat exchanger (11) is set to an evaporation region and the remaining part of the indoor heat exchanger (11) is set to a superheating region; and
and a 4 th dehumidification operation in which a portion of the indoor heat exchanger (11) on the upstream side of the control valve (13) is set to a condensation region, and a portion of the indoor heat exchanger (11) on the downstream side of the control valve (13) is set to an evaporation region.
5. An air conditioner according to claim 1 or 2,
the temperature of the trunk is an average temperature calculated using the temperature of at least one of the wall, floor, and ceiling of the room.
6. An air conditioning system, characterized in that the air conditioning system comprises:
a Refrigerant Circuit (RC) having a compressor (21), an outdoor heat exchanger (23), an indoor heat exchanger (11), and adjusting means (13, 24) for adjusting the size of the evaporation region of the indoor heat exchanger (11);
a control unit (100);
a 1 st temperature sensor (52) that detects the temperature of the indoor air; and
a 2 nd temperature sensor (54) for detecting the temperature of a trunk defining the indoor space,
the control unit (100, 221) controls the refrigerant circuit to perform a 1 st dehumidification operation in which substantially all of the indoor heat exchanger (11) is set to an evaporation region and a 2 nd dehumidification operation in which a part of the indoor heat exchanger (11) is set to an evaporation region,
the control unit (100, 221) selects one of the 1 st dehumidification operation and the 2 nd dehumidification operation using the temperature of the indoor air and the temperature of the trunk,
the control unit (100, 221) selects the 1 st dehumidification operation when a difference between the temperature of the indoor air and the temperature of the trunk is greater than a preset 1 st threshold value (α 2) and a difference between the temperature of the indoor air and the set temperature is less than a preset 2 nd threshold value (β 1), and selects the 2 nd dehumidification operation when the difference between the temperature of the indoor air and the temperature of the trunk is equal to or less than the 1 st threshold value (α 2) and the difference between the temperature of the indoor air and the set temperature is less than the 2 nd threshold value (β 1).
7. The air conditioning system of claim 6,
the control unit (100, 221) selects the 1 st dehumidification operation when a difference between the temperature of the indoor air and the temperature of the trunk is greater than the 1 st threshold value (α 2) and a difference between the temperature of the indoor air and a set temperature is greater than or equal to the 2 nd threshold value (β 1).
8. Air conditioning system according to claim 6 or 7,
the control unit (100, 221) selects the 1 st dehumidification operation when a difference between the temperature of the indoor air and the temperature of the trunk is equal to or less than the 1 st threshold value (α 2), and the difference between the temperature of the indoor air and a set temperature is greater than a 3 rd threshold value (β 2), the 3 rd threshold value (β 2) being set in advance so as to be greater than the 2 nd threshold value (β 1).
9. Air conditioning system according to claim 6 or 7,
the adjustment mechanisms (13, 24) are provided with an expansion mechanism (24) arranged on a refrigerant path between the outdoor heat exchanger (23) and the indoor heat exchanger (11), and a control valve (13) arranged in the middle of the refrigerant path of the indoor heat exchanger (11),
the 2 nd dehumidification operation includes:
a 3 rd dehumidification operation in which a part of the indoor heat exchanger (11) is set to an evaporation region and the remaining part of the indoor heat exchanger (11) is set to a superheating region; and
and a 4 th dehumidification operation in which a portion of the indoor heat exchanger (11) on the upstream side of the control valve (13) is set to a condensation region, and a portion of the indoor heat exchanger (11) on the downstream side of the control valve (13) is set to an evaporation region.
10. Air conditioning system according to claim 6 or 7,
the temperature of the trunk is an average temperature calculated using the temperature of at least one of the wall, floor, and ceiling of the room.
11. Air conditioning system according to claim 6 or 7,
the air conditioning system comprises:
an air conditioner (201); and
a server (202) capable of communicating with the air conditioner (201) via a power communication network (205),
the Refrigerant Circuit (RC) and the 1 st temperature sensor (52) are provided in the air conditioner (201),
the control unit (221) is provided in the server (202).
12. The air conditioning system of claim 11,
the 2 nd temperature sensor (54) is installed in the indoor space outside the air conditioner (201),
the air conditioner (201) receives a signal indicating the temperature of the trunk from the 2 nd temperature sensor (54) via the power communication network (205) and the server (202), or directly receives a signal indicating the temperature of the trunk without via the power communication network (205) and the server (202).
13. Air conditioning system according to claim 6 or 7,
the air conditioning system comprises:
an air conditioner (201); and
a server (202) capable of communicating with the air conditioner (201) via a power communication network (205),
the 2 nd temperature sensor (54) is installed in the indoor space outside the air conditioner (201),
the air conditioner (201) receives a signal indicating the temperature of the trunk from the 2 nd temperature sensor (54) via the power communication network (205) and the server (202), or directly receives a signal indicating the temperature of the trunk without via the power communication network (205) and the server (202).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019-056903 | 2019-03-25 | ||
| JP2019056903 | 2019-03-25 | ||
| PCT/JP2020/012736 WO2020196413A1 (en) | 2019-03-25 | 2020-03-23 | Air conditioner and air conditioning system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113574328A CN113574328A (en) | 2021-10-29 |
| CN113574328B true CN113574328B (en) | 2022-09-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080021897.XA Active CN113574328B (en) | 2019-03-25 | 2020-03-23 | Air conditioner and air conditioning system |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6881641B2 (en) |
| CN (1) | CN113574328B (en) |
| WO (1) | WO2020196413A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001099458A (en) * | 1999-09-30 | 2001-04-13 | Mitsubishi Electric Corp | Air conditioner |
| JP2013218506A (en) * | 2012-04-09 | 2013-10-24 | Toyota Home Kk | Heat management system of multiple dwelling house |
| JP2014088977A (en) * | 2012-10-29 | 2014-05-15 | Daikin Ind Ltd | Air conditioning device |
| CN104246387A (en) * | 2012-04-16 | 2014-12-24 | 大金工业株式会社 | Air conditioner |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100692894B1 (en) * | 2005-02-04 | 2007-03-12 | 엘지전자 주식회사 | Air conditioner and IN DOOR UINT in use with it and method for dehumidifying |
| JP6332537B2 (en) * | 2016-09-30 | 2018-05-30 | ダイキン工業株式会社 | Air conditioner |
-
2020
- 2020-03-18 JP JP2020047540A patent/JP6881641B2/en active Active
- 2020-03-23 WO PCT/JP2020/012736 patent/WO2020196413A1/en active Application Filing
- 2020-03-23 CN CN202080021897.XA patent/CN113574328B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001099458A (en) * | 1999-09-30 | 2001-04-13 | Mitsubishi Electric Corp | Air conditioner |
| JP2013218506A (en) * | 2012-04-09 | 2013-10-24 | Toyota Home Kk | Heat management system of multiple dwelling house |
| CN104246387A (en) * | 2012-04-16 | 2014-12-24 | 大金工业株式会社 | Air conditioner |
| JP2014088977A (en) * | 2012-10-29 | 2014-05-15 | Daikin Ind Ltd | Air conditioning device |
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|---|---|
| CN113574328A (en) | 2021-10-29 |
| JP2020159684A (en) | 2020-10-01 |
| WO2020196413A1 (en) | 2020-10-01 |
| JP6881641B2 (en) | 2021-06-02 |
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