WO2019163346A1 - Climatiseur - Google Patents

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Publication number
WO2019163346A1
WO2019163346A1 PCT/JP2019/001444 JP2019001444W WO2019163346A1 WO 2019163346 A1 WO2019163346 A1 WO 2019163346A1 JP 2019001444 W JP2019001444 W JP 2019001444W WO 2019163346 A1 WO2019163346 A1 WO 2019163346A1
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WO
WIPO (PCT)
Prior art keywords
indoor
temperature
control unit
indoor temperature
air conditioner
Prior art date
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PCT/JP2019/001444
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English (en)
Japanese (ja)
Inventor
裕記 藤岡
智彦 堤
晃宏 中野
Original Assignee
ダイキン工業株式会社
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Publication of WO2019163346A1 publication Critical patent/WO2019163346A1/fr

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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
    • 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
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • 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
    • 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
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • 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
    • F25B13/00—Compression machines, plants or systems, with reversible cycle

Definitions

  • This disclosure relates to air conditioners.
  • Patent Document 1 JP-A-5-10625
  • the air conditioner starts the compressor and sets the blower in the indoor unit (hereinafter referred to as “indoor blower”) to the high wind mode to perform the heating operation. do.
  • the temperature reading value of the room temperature sensor exceeds the room temperature set value in a shorter time than when the indoor fan does not operate in the strong wind mode. At this time, when the heating operation is temporarily stopped and the temperature reading value of the room temperature sensor is lower than the room temperature setting value again, the heating operation is resumed, and thus the problem of frequent start / stop occurs.
  • This disclosure provides an air conditioner that can suppress an increase in the number of starts and stops.
  • the air conditioner of this disclosure is A refrigerant circuit having a compressor, an outdoor heat exchanger, an expansion mechanism, and an indoor heat exchanger, in which the refrigerant circulates; An indoor fan for blowing air to the indoor heat exchanger; An indoor temperature sensor for detecting the indoor temperature; A control device, The control device During cooling operation, when the room temperature detected by the room temperature sensor is equal to or lower than the room temperature set by the user, the cooling operation is temporarily stopped, while during heating operation, the room temperature detected by the room temperature sensor is A first operation control unit for temporarily stopping the heating operation when the temperature is equal to or higher than the indoor temperature set by the user; After the cooling operation is temporarily stopped by the first operation control unit, when the room temperature detected by the room temperature sensor is higher than the room temperature set by the user, or the heating operation is performed by the first operation control unit When the indoor temperature detected by the indoor temperature sensor is lower than the indoor temperature set by the user after the suspension is stopped, the determination unit determines whether the indoor air conditioning load is equal to or lower than a predetermined air conditioning load.
  • the indoor fan rotates at a rotational speed lower than the rotational speed that can be manually set by the user, and the compressor A second operation control unit that restarts the cooling operation or the heating operation under a condition of driving at a predetermined frequency.
  • the cooling operation or the heating operation is restarted by the second operation control unit according to the determination result of the determination unit.
  • the cooling operation or the heating operation is restarted under the condition that the indoor fan rotates at a rotation speed lower than the rotation speed that can be manually set by the user, an increase in the number of start / stop times can be suppressed.
  • the control device is configured to restart the cooling operation or the heating operation temporarily stopped by the first operation control unit when the determination unit determines that the indoor air conditioning load exceeds a predetermined air conditioning load.
  • the predetermined frequency is equal to or lower than a frequency used for driving the compressor in the cooling operation or the heating operation restarted by the third operation control unit.
  • the frequency used for driving the compressor in the cooling operation or the heating operation restarted by the third operation control unit when the cooling operation or the heating operation is restarted by the second operation control unit, the frequency used for driving the compressor in the cooling operation or the heating operation restarted by the third operation control unit.
  • the compressor is driven. Therefore, the occurrence of dew can be suppressed during the cooling operation, while the occurrence of a short circuit can be suppressed during the heating operation.
  • the predetermined frequency is the lowest frequency among the frequencies for operating the compressor.
  • the compressor when the cooling operation or the heating operation is resumed by the second operation control unit, the compressor is driven at the lowest frequency among the frequencies for operating the compressor.
  • production of a circuit can be heightened.
  • the cooling operation or heating operation that is temporarily stopped by the first operation control unit is an automatic cooling operation or automatic heating operation that automatically changes the rotation speed of the indoor fan according to the indoor temperature detected by the indoor temperature sensor. is there.
  • the first cooling unit can surely temporarily stop the automatic cooling operation or the automatic heating operation.
  • the control device After the cooling operation is restarted by the second operation control unit, the control device is configured such that the room temperature detected by the room temperature sensor is higher than the room temperature set by the user, or the second operation control.
  • the control mode of the rotational speed of the indoor fan and the frequency of the compressor is set.
  • a control mode changing unit for changing to the control mode of the cooling operation or the heating operation temporarily stopped by the first operation control unit.
  • control mode changing unit can suppress an increase in the difference between the room temperature and the set temperature after the cooling operation is restarted by the second operation control unit.
  • the rated cooling output is less than 2.2 kW.
  • the rated cooling capacity is less than 2.2 kW, air conditioning suitable for a narrow space such as a washroom or a kitchen can be performed.
  • FIG. 1 is a configuration diagram of a multi-type air conditioner including a low-capacity indoor unit 20C according to an embodiment of the present disclosure.
  • the multi-type air conditioner includes an indoor unit 20A having an indoor heat exchanger 4A and an indoor fan 5A, an indoor unit 20B having an indoor heat exchanger 4B and an indoor fan 5B, and indoor heat exchange.
  • a low-capacity indoor unit 20C having a unit 4C and an indoor fan 5C, and an outdoor unit 10 connected to the indoor units 20A and 20B and the low-capacity indoor unit 20C via a refrigerant pipe.
  • the indoor fans 5A, 5B, 5C send air to the indoor heat exchangers 4A, 4B, 4C.
  • the outdoor unit 10 corresponds to a multi-type air conditioner to which a plurality of indoor units can be connected, and the low-capacity indoor unit 20C can operate as an indoor unit of the multi-type air conditioner.
  • 1 is a compressor
  • 2 is a four-way switching valve with one end connected to the discharge side of the compressor
  • 3 is an outdoor heat exchanger with one end connected to the other end of the four-way switching valve
  • EVA , EVB, EVC are electric expansion valves having one end connected to the other end of the outdoor heat exchanger 3, respectively.
  • An exchanger 6 is an accumulator in which one end is connected to the other end of the indoor heat exchangers 4A, 4B, and 4C via the four-way switching valve 2 and the other end is connected to the suction side of the compressor 1.
  • Indoor fans 5A, 5B, 5C are arranged in the vicinity of the indoor heat exchangers 4A, 4B, 4C, respectively.
  • the electric expansion valve EVC is an example of an expansion mechanism.
  • a plurality of refrigerant pipe connection portions 7A, 7B, 7C are connected to the other ends of the electric expansion valves EVA, EVB, EVC, and the plurality of refrigerant pipe connection portions 7A, 7B, 7C are connected to the other refrigerant piping connection ports (refrigerant pipes).
  • One end of each of the indoor heat exchangers 4A, 4B, 4C is connected.
  • a plurality of refrigerant pipe connection portions 8A, 8B, and 8C are connected to the other ends of the indoor heat exchangers 4A, 4B, and 4C through connection pipes (refrigerant pipes).
  • the compressor 1, the four-way switching valve 2, the outdoor heat exchanger 3, the electric expansion valves EVA, EVB, EVC, the indoor heat exchangers 4A, 4B, 4C, and the accumulator 6 constitute a refrigerant circuit.
  • This refrigerant circuit is filled with, for example, a slightly flammable R32 refrigerant.
  • a discharge pipe temperature sensor 11 is provided on the discharge side of the compressor 1.
  • the outdoor heat exchanger 3 is provided with an outdoor heat exchanger temperature sensor 12 for detecting the outdoor heat exchanger temperature, and an outdoor temperature sensor 13 for detecting the outdoor temperature is provided in the vicinity of the outdoor heat exchanger 3.
  • the indoor heat exchanger 4A is provided with an indoor heat exchanger temperature sensor 15A that detects the temperature of the indoor heat exchanger, and an indoor temperature sensor 16A that detects the indoor temperature is provided near the indoor heat exchanger 4A.
  • the indoor heat exchanger 4B is provided with an indoor heat exchanger temperature sensor 15B that detects the temperature of the indoor heat exchanger, and an indoor temperature sensor 16B that detects the indoor temperature is provided near the indoor heat exchanger 4B.
  • the indoor heat exchanger 4C is provided with an indoor heat exchanger temperature sensor 15C that detects the temperature of the indoor heat exchanger, and an indoor temperature sensor 16C that detects the indoor temperature is provided near the indoor heat exchanger 4C.
  • the outdoor unit 10 includes an outdoor control device 18 including a microcomputer and an input / output circuit.
  • the indoor units 20A and 20B are each provided with an indoor control device (not shown), and the low-capacity indoor unit 20C is provided with an indoor control device 100 (shown in FIG. 3).
  • the indoor control device 100 is an example of a control device.
  • the indoor control devices of the indoor units 20A and 20B and the indoor control device 100 of the low capacity indoor unit 20C communicate with the outdoor control device 18 of the outdoor unit 10 via a communication line (not shown), thereby
  • the control device 18, the indoor control devices of the indoor units 20A and 20B, and the indoor control device 100 of the low-capacity indoor unit 20C operate in cooperation, thereby operating as a multi-type air conditioner.
  • the four-way switching valve 2 is switched to the dotted line position and the operation of the compressor 1 is started. Then, the electric expansion valves EVA, EVB, EVC are each opened to a predetermined opening degree.
  • the high-temperature and high-pressure gas refrigerant discharged from the compressor 1 is condensed by a heat exchange with the outdoor air by operating an outdoor fan (not shown) in the outdoor heat exchanger 3 to become a liquid refrigerant.
  • the liquid refrigerant from the indoor heat exchangers 4A, 4B, 4C is decompressed by the electric expansion valves EVA, EVB, EVC, and then the indoor fans 5A, 5B, 5C are operated to operate the indoor heat exchanger 4A, At 4B and 4C, it evaporates by heat exchange with room air to become a gas refrigerant, and returns to the suction side of the compressor 1.
  • the rated cooling capacity of the indoor units 20A and 20B is 2.2 kW
  • the rated cooling capacity of the low capacity indoor unit 20C is 0.8 kW. That is, the low-capacity indoor unit 20C has a lower capacity than the indoor units 20A and 20B.
  • the four-way switching valve 2 is switched to the position of the solid line, and the operation of the compressor 1 is started. Then, the electric expansion valves EVA, EVB, EVC are each opened to a predetermined opening degree.
  • the high-temperature and high-pressure gas refrigerant discharged from the compressor 1 is condensed by heat exchange with indoor air in the indoor heat exchangers 4A, 4B, and 4C by operating the indoor fans 5A, 5B, and 5C. Become.
  • the liquid refrigerant from the indoor heat exchangers 4A, 4B, 4C is decompressed by the electric expansion valves EVA, EVB, EVC, and then an outdoor fan (not shown) is operated by the outdoor heat exchanger 3. It evaporates by heat exchange with the outdoor air to become a gas refrigerant and returns to the suction side of the compressor 1.
  • FIG. 2 is an external view of the low-capacity indoor unit 20C viewed obliquely from below.
  • This indoor unit is a ceiling-embedded indoor unit.
  • the low-capacity indoor unit 20C includes a casing main body 101, a rectangular panel 102 attached to the lower side of the casing main body 101, and a grill 103 detachably attached to the panel 102. ing.
  • the blower outlet 110 is provided along the short side of the panel 102 on one side in the longitudinal direction of the panel 102.
  • a flap 120 is rotatably attached to the panel 102.
  • FIG. 2 shows a state in which the air outlet 110 is closed by the flap 120.
  • a drain socket 107 is provided so as to protrude from the side wall of the casing body 101.
  • a drain hose (not shown) is connected to the drain socket 107 from the outside.
  • the pipe connecting portions 105 and 106 are provided so as to protrude from the side wall of the casing main body 101.
  • a refrigerant pipe (not shown) is connected to the pipe connecting portions 105 and 106 from the outside.
  • reference numeral 108 denotes an electrical component part
  • reference numerals 111 to 113 denote suspension fittings provided so as to protrude laterally from the casing main body 101, respectively.
  • FIG. 3 is a block diagram of the indoor control device 100 of the low-capacity indoor unit 20C.
  • the low-capacity indoor unit 20C includes an indoor control device 100 including a microcomputer and an input / output circuit as shown in FIG.
  • an indoor heat exchanger temperature sensor 15C In the indoor control device 100, an indoor heat exchanger temperature sensor 15C, an indoor temperature sensor 16C, a fan motor 21, a flap drive unit 22, and a display unit 23 are connected.
  • the indoor control device 100 includes a first operation control unit 100a, a determination unit 100b, a second operation control unit 100c, and a control mode change unit 100e.
  • the indoor control device 100 can grasp the outdoor temperature detected by the outdoor temperature sensor 13 by communicating with the outdoor control device 18.
  • the first operation control unit 100a temporarily stops the automatic cooling operation, while during the automatic heating operation, When the room temperature detected by the room temperature sensor 16C is equal to or higher than the room temperature set by the user, the automatic heating operation is temporarily stopped.
  • the automatic cooling operation means a cooling operation in which the rotation speed of the indoor fan 5C is automatically changed according to the room temperature detected by the room temperature sensor 16C.
  • the automatic heating operation means a heating operation in which the rotational speed of the indoor fan 5C is automatically changed according to the indoor temperature detected by the indoor temperature sensor 16C.
  • the determination unit 100b is configured such that the room temperature detected by the room temperature sensor 16C is higher than the room temperature set by the user, or the first operation. If the indoor temperature detected by the indoor temperature sensor 16C is lower than the indoor temperature set by the user after the automatic heating operation is temporarily stopped by the control unit 100a, is the indoor air conditioning load equal to or lower than the predetermined air conditioning load? Determine whether or not.
  • the second operation control unit 100c rotates the indoor fan 5C at a rotation speed lower than the rotation speed that can be manually set by the user.
  • the automatic cooling operation or the automatic heating operation is restarted under the condition that the compressor 1 is driven at a predetermined frequency.
  • the third operation control unit 100d resumes the automatic cooling operation or the automatic heating operation temporarily stopped by the first operation control unit 100a. .
  • the control mode changing unit 100e is configured to start the second operation when the indoor temperature detected by the indoor temperature sensor 16C is higher than the indoor temperature set by the user after the automatic cooling operation is resumed by the second operation control unit. After the automatic heating operation is resumed by the control unit, when the indoor temperature detected by the indoor temperature sensor 16C is lower than the indoor temperature set by the user, the rotational speed of the indoor fan 5C and the frequency of the compressor 1 are controlled. The mode is changed to the control mode of automatic cooling operation or automatic heating operation temporarily stopped by the first operation control unit 100a.
  • FIG. 4 is a flowchart for explaining the control performed by the indoor control device 100 during the automatic cooling operation. This control starts in response to the start of automatic cooling operation.
  • step S1 the room temperature T 1 detected by the room temperature sensor 16C is a temperature obtained by subtracting a predetermined temperature (eg, 2 ° C.) from the set temperature T 0. (Hereinafter, it is referred to as “first reference temperature T 0-2 ”).
  • first reference temperature T 0-2 a predetermined temperature obtained by subtracting a predetermined temperature (eg, 2 ° C.) from the set temperature T 0.
  • step S2 the automatic cooling operation is thermo-OFF. That is, the compressor 1 and the indoor fan 5C are stopped, and the automatic cooling operation is temporarily stopped.
  • step S3 the indoor temperature T 1 is the set temperature T 0 at a predetermined temperature (for example, 1 ° C.) and the mixture was temperature (hereinafter, referred to as "second reference temperature T 0 + 1".) Or more or is not Determine whether.
  • the process proceeds to the next step S4.
  • step S3 performed when the indoor temperature T 1 of the determined not second reference temperature T 0 + 1 or more, the step S3 again.
  • step S4 it is determined whether the indoor air conditioning load is equal to or less than a predetermined standard air conditioning load. More specifically, in step S4, the indoor temperature T 1 is predetermined indoor temperature (e.g. 27 ° C.) or less, and the outdoor temperature T 2 detected by the outdoor temperature sensor 13 is a predetermined outdoor temperature (e.g. 35 ° C. ) It is determined whether the following is true. In this step S4, the indoor temperature T 1 is less than the predetermined indoor temperature, and when the outdoor temperature T 2 is determined to be equal to or less than a predetermined outdoor temperature, the flow proceeds to the next step S5. On the other hand, in step S4, the indoor temperature T 1 is less than the predetermined indoor temperature, and when the outdoor temperature T 2 is determined not to become below a predetermined outdoor temperature, in step S11, and restarts the automatic cooling operation Return to step S1.
  • the indoor temperature T 1 is predetermined indoor temperature (e.g. 27 ° C.) or less
  • the outdoor temperature T 2 detected by the outdoor temperature sensor 13 is a predetermined
  • step S5 the small capacity cooling operation is started.
  • the rotation speed of the indoor fan 5C in the small capacity cooling operation is set to a rotation speed (for example, 650 rpm) smaller than the rotation speed corresponding to the minimum air volume that can be manually set in the low capacity indoor unit 20C during the cooling operation.
  • the air volume of the low-capacity indoor unit 20C is, for example, 1 m 3 / min.
  • the frequency of the compressor 1 in the small capacity cooling operation is set to a frequency (6 Hz) lower than the frequency (for example, 10 Hz) of the compressor 1 for the automatic cooling operation restarted in step S11. Further, during the small capacity cooling operation, the rotation speed of the indoor fan 5C and the frequency of the compressor 1 are kept constant.
  • the air volume of the low-capacity indoor unit 20C is, for example, six levels of “large air volume”, “first intermediate air volume”, “medium air volume”, “second intermediate air volume”, “small air volume”, and “micro air volume”. It is possible to set manually.
  • the “first intermediate air volume” is smaller than the “large air volume” and larger than the “medium air volume”.
  • the “second intermediate air volume” is an air volume that is smaller than the “medium air volume” and larger than the “small air volume”.
  • the “large air volume” is an air volume larger than the “medium air volume”
  • the “small air volume” is an air volume smaller than the “medium air volume”.
  • the “minute air volume” corresponds to the minimum air volume that can be manually set in the low-capacity indoor unit 20C. Further, when the “minute air volume” is manually set, the rotational speed of the indoor fan 5C is, for example, 1000 rpm.
  • step S6 it is determined whether the indoor temperature T 1 is exceeds the set temperature T 0.
  • step S6 when the indoor temperature T 1 is is determined to exceed the set temperature T 0, in step S7, and ends the small capacity cooling operation, the process proceeds to step S11.
  • step S6 when the indoor temperature T 1 is is determined not to exceed the set temperature T 0, is performed again step S6.
  • the first operation control unit 100a executes step S2
  • the determination unit 100b executes step S4
  • the second operation control unit 100c executes step S5.
  • the third operation control unit 100d executes step S11.
  • the control mode changing unit 100e executes steps S7 and S11.
  • the second operation control unit 100c executes step S5. Therefore, the rotation speed is lower than the rotation speed that can be manually set by the user.
  • the indoor fan 5C rotates. Therefore, since no indoor temperature T 1 is below the set temperature T 0 in a short time, when cooling the room, it is possible to suppress the increase of the start-stop number.
  • the second operation control unit 100c executes step S5, so that the frequency is lower than the frequency of the compressor 1 for automatic cooling operation restarted in step S11.
  • the compressor 1 is driven at a low frequency. Therefore, condensation is less likely to occur at the flap 120. That is, the occurrence of dew can be suppressed in the low-capacity indoor unit 20C.
  • Step S2 since the first operation control unit 100a executes Step S2, the automatic cooling operation can be surely temporarily stopped.
  • control mode changing unit 100e executes the step S7, S11, it is possible to suppress after small capacity cooling operation is started, that the difference between the indoor temperature T 1 of the set temperature T 0 increases.
  • the rated cooling capacity of the low-capacity indoor unit 20C is less than 2.2 kW, it is possible to perform cooling suitable for a narrow space such as a washroom or a kitchen.
  • FIG. 5 is a flowchart for explaining the control performed by the indoor control device 100 during the automatic heating operation. This control starts in response to the start of automatic heating operation.
  • step S21 the temperature of the room temperature T 1 of which is detected by the indoor temperature sensor 16C is, by adding a predetermined temperature (for example, 2 ° C.) from the set temperature T 0 (Hereinafter, referred to as “third reference temperature T 0 + 2 ”).
  • a predetermined temperature for example, 2 ° C.
  • step S21 if it is determined that the indoor temperature T 1 is at the third reference temperature T 0 + 2 or more, the process proceeds to the next step S22.
  • step S21 performs the indoor temperature T 1 is is determined not to be the third reference temperature T 0 + 2 or more, the step S21 again.
  • the set temperature T 0 means, for example, a temperature set by a user with a remote controller (not shown).
  • step S22 the automatic heating operation is thermo-off. That is, the compressor 1 and the indoor fan 5C are stopped, and the automatic heating operation is temporarily stopped.
  • step S23 the indoor temperature T 1 is the set temperature T 0 at a predetermined temperature (for example, 1 ° C.) and the mixture was temperature (hereinafter, referred to as "second reference temperature T 0 + 1".) Or more or is not Determine whether.
  • the process proceeds to the next step S24.
  • step S23 it performs the indoor temperature T 1 of the determined not second reference temperature T 0 + 1 or more, the step S23 again.
  • step S24 it is determined whether the indoor air conditioning load is equal to or less than a predetermined standard air conditioning load. More specifically, in step S24, the indoor temperature T 1 is predetermined indoor temperature (e.g. 20 ° C.) or less, and the outdoor temperature T 2 detected by the outdoor temperature sensor 13 is a predetermined outdoor temperature (e.g. 7 ° C. ) It is determined whether it is above. In this step S24, the indoor temperature T 1 is less than the predetermined indoor temperature, and when the outdoor temperature T 2 is determined to be equal to or greater than the predetermined outdoor temperature, the flow proceeds to the next step S25. On the other hand, in step S24, the indoor temperature T 1 is less than the predetermined indoor temperature, and when the outdoor temperature T 2 is determined not to become higher than a predetermined outdoor temperature, in step S31, and restarts the automatic heating operation Return to step S21.
  • the indoor temperature T 1 is predetermined indoor temperature (e.g. 20 ° C.) or less
  • the outdoor temperature T 2 detected by the outdoor temperature sensor 13 is
  • step S25 the small capacity heating operation is started.
  • the rotation speed of the indoor fan 5C in the small capacity heating operation is set to a rotation speed (for example, 800 rpm) smaller than the rotation speed corresponding to the minimum air volume that can be manually set in the low capacity indoor unit 20C, that is, the “micro air volume”.
  • the air volume of the low-capacity indoor unit 20C is, for example, 1.5 m 3 / min.
  • the frequency of the compressor 1 in the small capacity heating operation is set to a frequency (10 Hz) lower than the frequency (for example, 14 Hz) of the compressor 1 for the automatic heating operation restarted in step S31. Further, during the small capacity heating operation, the rotation speed of the indoor fan 5C and the frequency of the compressor 1 are kept constant.
  • step S26 it is determined whether the indoor temperature T 1 is less than the set temperature T 0.
  • step S26 when the indoor temperature T 1 is is determined to be less than the set temperature T 0, in step S27, and terminates the small capacity heating operation, the flow proceeds to step S31.
  • step S26 when the indoor temperature T 1 is is determined not to be less than the set temperature T 0, is performed again step S26.
  • the first operation control unit 100a executes step S22
  • the determination unit 100b executes step S24
  • the second operation control unit 100c executes step S25.
  • the third operation control unit 100d executes step S31.
  • the control mode changing unit 100e executes steps S27 and S31.
  • the second operation control unit 100c executes Step S25, so that the rotation speed is lower than the rotation speed that can be manually set by the user.
  • the indoor fan 5C rotates. Therefore, since no indoor temperature T 1 is higher than the set temperature T 0 in a short time, when heating the room, it is possible to suppress the increase of the start-stop number.
  • step S25 when the low-capacity indoor unit 20C returns to the thermo state and performs the automatic heating operation, since the second operation control unit 100c executes step S25, the frequency of the compressor 1 for the automatic heating operation restarted in step S31 is exceeded.
  • the compressor 1 is driven at a low frequency. Therefore, the phenomenon that the warm air blown from the low-capacity indoor unit 20C rises without passing through the lower part of the indoor space and is sucked into the low-capacity indoor unit 20C is less likely to occur. That is, the occurrence of a short circuit can be suppressed.
  • control mode changing unit 100e executes the steps S27, S31, it is possible to suppress after small capacity heating operation is started, that the difference between the indoor temperature T 1 of the set temperature T 0 increases.
  • the rated cooling capacity of the low-capacity indoor unit 20C is less than 2.2 kW, heating suitable for a narrow space such as a washroom or a kitchen can be performed.
  • the rated cooling capacity of the low-capacity indoor unit 20C is 0.8 kW, but may be other than 0.8 kW.
  • the low-capacity indoor unit 20C is installed from the viewpoint of air-conditioning the low-capacity indoor unit 20C in a space such as a washroom (for example, a room area of 3.3 m 2 ⁇ ceiling height of 2.4 m).
  • the rated cooling capacity is preferably less than 2.2 kW.
  • step S2 when the automatic cooling operation is turned off in step S2, the control in steps S2 to S7 and S11 is performed.
  • the cooling operation other than the automatic cooling operation for example, the cooling in which the air flow rate is fixed.
  • the same control as in steps S2 to S7 and S11 may be performed.
  • step S4 when it is determined in step S4 that the indoor air conditioning load is not equal to or less than the predetermined standard air conditioning load, the automatic cooling operation temporarily stopped with the thermo OFF is resumed in step S11.
  • an operation other than the automatic cooling operation for example, a cooling operation in which the air flow rate is fixed may be started.
  • the frequency of the compressor 1 during the small capacity cooling operation is set to be lower than the frequency of the compressor 1 for the automatic cooling operation restarted in step S11. It may be the same as the frequency or the same as the lowest frequency among the frequencies for operating the compressor.
  • step S22 when the automatic heating operation is turned off in step S22, the control in steps S22 to S27 and S31 is performed.
  • the heating operation other than the automatic heating operation for example, heating in which the air flow rate is fixed
  • the same control as in steps S22 to S27 and S31 may be performed.
  • step S24 when it is determined in step S24 that the indoor air conditioning load is not equal to or less than the predetermined standard air conditioning load, the automatic heating operation temporarily stopped with the thermo-OFF is resumed in step S31.
  • an operation other than the automatic heating operation for example, a heating operation in which the air flow rate is fixed may be started.
  • the frequency of the compressor 1 at the time of small capacity heating operation was made to become lower than the frequency of the compressor 1 of automatic heating operation restarted by step S31, It may be the same as the frequency or the same as the lowest frequency among the frequencies for operating the compressor.
  • At least one of the first operation control unit 100a, the determination unit 100b, the second operation control unit 100c, and the control mode change unit 100e may be configured by software or by hardware. It may be configured.
  • Compressor 2 Four-way selector valve, 3 outdoor heat exchanger, 4A, 4B, 4C Indoor heat exchanger 5A, 5B, 5C Indoor fan 6 Accumulator 7A, 7B, 7C Refrigerant pipe connection part 8A, 8B, 8C Refrigerant pipe connection part 10 Outdoor unit 11 Discharge pipe temperature sensor 12 Outdoor heat exchanger temperature Sensor 13 Outdoor temperature sensor 15A, 15B, 15C Indoor heat exchanger temperature sensor 16A, 16B, 16C Indoor temperature sensor 18 Outdoor controller 20A, 20B ... Indoor unit 20C Low-capacity indoor unit 100 Indoor controller 100a First operation controller 100b Determination unit 100c Second operation control unit 100d Third operation control unit 100e Control mode change unit EVA, EVB, EVC Electric expansion valve

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fluid Mechanics (AREA)
  • Air Conditioning Control Device (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)

Abstract

Un dispositif de commande (100) pour un climatiseur, comprenant : une unité de détermination (100b) pour déterminer si oui ou non la charge de climatisation intérieure est égale ou inférieure à une charge de conditionnement d'air prescrite, si, après qu'une opération de refroidissement est temporairement arrêtée par une première unité de commande d'opération (100a), la température intérieure (T1) détectée par un capteur de température intérieure (16c) est supérieure à une température intérieure (T0) réglée par un utilisateur, ou si, après qu'une opération de chauffage est temporairement arrêtée par une première unité de commande d'opération (100a), la température intérieure (T1) détectée par un capteur de température intérieure (16c) est inférieure à une température intérieure (T0) réglée par un utilisateur ; et une deuxième unité de commande d'opération (100c) qui, lorsqu'il est déterminé par l'unité de détermination (100b) que la charge de climatisation intérieure est égale ou inférieure à la charge de climatisation prescrite, redémarre l'opération de refroidissement ou l'opération de chauffage dans un état dans lequel un compresseur (1) entraîne à une fréquence prescrite et un ventilateur intérieur (5c) tourne à une vitesse de rotation inférieure à la vitesse de rotation que l'utilisateur peut régler manuellement.
PCT/JP2019/001444 2018-02-23 2019-01-18 Climatiseur WO2019163346A1 (fr)

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WO2021214816A1 (fr) * 2020-04-20 2021-10-28 三菱電機株式会社 Dispositif à cycle frigorifique, climatiseur, et dispositif de refroidissement
CN113028576B (zh) * 2021-04-22 2022-05-06 宁波奥克斯电气股份有限公司 一种空调器控制方法、控制装置以及空调器
CN113959078B (zh) * 2021-09-16 2023-02-28 青岛海尔空调电子有限公司 用于压缩机的控制方法、装置、设备及存储介质
CN113915749A (zh) * 2021-10-27 2022-01-11 奥普家居股份有限公司 空调控制方法、空调装置、计算机可读存储介质
CN114294772A (zh) * 2021-12-30 2022-04-08 海信（广东）空调有限公司 空调器健康功能控制方法、空调器和计算机存储介质

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JP2010078217A (ja) * 2008-09-25 2010-04-08 Daikin Ind Ltd 空調システム
JP2014020687A (ja) * 2012-07-19 2014-02-03 Mitsubishi Electric Corp 空調装置
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