WO2020070891A1 - 空気調和機、空気調和機の制御方法およびプログラム - Google Patents

空気調和機、空気調和機の制御方法およびプログラム

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Publication number
WO2020070891A1
WO2020070891A1 PCT/JP2018/037443 JP2018037443W WO2020070891A1 WO 2020070891 A1 WO2020070891 A1 WO 2020070891A1 JP 2018037443 W JP2018037443 W JP 2018037443W WO 2020070891 A1 WO2020070891 A1 WO 2020070891A1
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WO
WIPO (PCT)
Prior art keywords
air
heat exchanger
cleaning operation
indoor fan
indoor
Prior art date
Application number
PCT/JP2018/037443
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
烈将 毛塚
Original Assignee
日立ジョンソンコントロールズ空調株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日立ジョンソンコントロールズ空調株式会社 filed Critical 日立ジョンソンコントロールズ空調株式会社
Priority to EP18903046.3A priority Critical patent/EP3862643A4/de
Priority to JP2019500680A priority patent/JP6498374B1/ja
Priority to CN201880047517.2A priority patent/CN111279134A/zh
Priority to PCT/JP2018/037443 priority patent/WO2020070891A1/ja
Priority to MYPI2019005752A priority patent/MY201435A/en
Priority to TW108135920A priority patent/TWI720637B/zh
Publication of WO2020070891A1 publication Critical patent/WO2020070891A1/ja

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Classifications

    • 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
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • 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
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41—Defrosting; Preventing freezing
    • F24F11/43—Defrosting; Preventing freezing of indoor units
    • 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
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • 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
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/20—Humidity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2221/00—Details or features not otherwise provided for
    • F24F2221/22—Cleaning ducts or apparatus

Definitions

  • the present invention relates to an air conditioner, an air conditioner control method, and a program.
  • Patent Literature 1 states that “The air conditioner includes a refrigeration cycle having a heat exchanger that cools or heats surrounding air, and execution of a heating operation, a cooling operation, a dehumidification operation, and the like. And a control device 130 that controls the refrigeration cycle so as to execute a cleaning operation for cleaning the surface of the heat exchanger, wherein the control device 130 performs the cleaning operation when a predetermined condition occurs. It has a regulation control unit 138 that regulates the execution.
  • Japanese Patent Application Laid-Open No. H11-163873 discusses temperature detection in an air-conditioned room, that is, an indoor space in which an indoor unit is installed.
  • the room temperature detecting unit 161 detects the temperature in the air-conditioned room, It is preferable to detect the room temperature in the same range as the photographing range by the imaging unit 110. "(see the specification, paragraph 0020).
  • an indoor unit of an air conditioner is provided with a plurality of sensors, and as described in Patent Document 1, any one of the sensors is applied as a sensor for detecting the state of an air-conditioned room.
  • any one of the sensors is applied as a sensor for detecting the state of an air-conditioned room.
  • the difference between the measurement result of the sensor and the actual state of the air-conditioning room becomes large, which may cause a case where the cleaning operation cannot be appropriately performed.
  • the present invention has been made in view of the above-described circumstances, and has as its object to provide an air conditioner, a method of controlling an air conditioner, and a program that can appropriately execute a cleaning operation.
  • an air conditioner of the present invention has a refrigeration cycle including a compressor that compresses a refrigerant, an indoor heat exchanger that cools or heats air in an air conditioning room, and a surface of the indoor heat exchanger.
  • a sensor for driving the indoor fan for a predetermined time before executing the cleaning operation, and a detection result of the air condition sensor after driving the indoor fan is set to a first predetermined value.
  • a function of executing the cleaning operation on condition that the cleaning operation is performed within the range.
  • the cleaning operation can be appropriately performed.
  • FIG. 1 is a system diagram of an air conditioner 100 according to a first embodiment of the present invention. It is a sectional side view of the indoor unit in a 1st embodiment. 5 is a flowchart of a cleaning operation processing routine according to the first embodiment. It is a flow chart of a washing operation processing routine in a 2nd embodiment. It is a flow chart of a washing operation processing routine in a third embodiment.
  • FIG. 1 is a system diagram of an air conditioner 100 according to a first embodiment of the present invention.
  • the air conditioner 100 includes an outdoor unit 30, an indoor unit 60, and a control device 20 that controls these.
  • the indoor unit 60 sets an operation mode (cooling, heating, dehumidification, ventilation, etc.), an indoor air volume (rapid wind, strong wind, weak wind, etc.), a target indoor temperature, and the like according to a signal input from the remote controller 90.
  • the control device 20 includes hardware as a general computer, such as a CPU (Central Processing Unit), a DSP (Digital Signal Processor), a RAM (Random Access Memory), and a ROM (Read Only Memory). , A control program executed by the CPU, various data, and the like.
  • the control device 20 controls each unit of the outdoor unit 30 and the indoor unit 60 based on the control program. The details will be described later.
  • the outdoor unit 30 includes a compressor 32, a four-way valve 34, and an outdoor heat exchanger 36.
  • the compressor 32 includes a motor 32a and has a function of compressing the refrigerant flowing through the four-way valve 34.
  • a suction side temperature sensor 41 for detecting the temperature of the refrigerant drawn into the compressor 32 and a suction side pressure sensor 45 for detecting the pressure of the refrigerant drawn into the compressor 32 are provided in the pipe a1.
  • a discharge-side temperature sensor 42 for detecting the temperature of the refrigerant discharged from the compressor 32 and a discharge-side pressure sensor 46 for detecting the pressure of the refrigerant discharged from the compressor 32 are provided in the pipe a2.
  • the compressor 32 is provided with a compressor temperature sensor 43 for detecting the temperature of the compressor 32.
  • the four-way valve 34 has a function of switching the direction of the refrigerant supplied to the indoor unit 60 depending on whether the indoor heat exchanger 64 functions as an evaporator or a condenser.
  • the indoor heat exchanger 64 functions as an evaporator, for example, during a cooling operation
  • the four-way valve 34 is switched to connect the pipes a2 and a3 and connect the pipes a1 and a6 along the path indicated by the solid line.
  • the high-temperature and high-pressure refrigerant discharged from the compressor 32 is cooled by the outdoor heat exchanger 36.
  • the cooled refrigerant is supplied to the indoor unit 60 via the pipe a5.
  • the four-way valve 34 connects the pipes a2 and a6 and connects the pipes a1 and a3 along the path indicated by the broken line. Can be switched.
  • the high-temperature and high-pressure refrigerant discharged from the compressor 32 is supplied to the indoor unit 60 via the pipes a2 and a6.
  • the outdoor fan 48 includes a motor 48 a and sends air to the outdoor heat exchanger 36.
  • the outdoor heat exchanger 36 is a heat exchanger that exchanges heat between the air sent from the outdoor fan 48 and the refrigerant, and is connected to the compressor 32 via the four-way valve 34.
  • the outdoor unit 30 includes an outdoor heat exchanger inlet temperature sensor 51 that detects the temperature of air flowing into the outdoor heat exchanger 36, and an outdoor heat exchanger that detects the temperature of the gas-side refrigerant of the outdoor heat exchanger 36.
  • a refrigerant gas temperature sensor 53 and an outdoor heat exchanger refrigerant liquid temperature sensor 55 that detects the temperature of the liquid-side refrigerant of the outdoor heat exchanger 36 are mounted.
  • the power supply unit 54 receives a three-phase AC voltage from the commercial power supply 22.
  • the power measurement unit 58 is connected to the power supply unit 54, and the power consumption of the air conditioner 100 is measured by this.
  • the DC voltage output from the power supply unit 54 is supplied to the motor control unit 56.
  • the motor control unit 56 includes an inverter (not shown), and supplies an AC voltage to the motor 32a of the compressor 32 and the motor 48a of the outdoor fan 48. Further, the motor control unit 56 controls the motors 32a and 48a without a sensor, and thereby detects the rotation speed of the motors 32a and 48a.
  • the indoor unit 60 includes an indoor expansion valve 62, an indoor heat exchanger 64, an indoor fan 66, a motor control unit 67, and a remote control communication unit 68 for performing bidirectional communication with the remote control 90.
  • the indoor fan 66 includes a motor 66a and sends air to the indoor heat exchanger 64.
  • the motor control section 67 includes an inverter (not shown) and supplies an AC voltage to the motor 66a. Further, the motor control section 67 controls the motor 66a without a sensor, and thereby detects the rotation speed of the motor 66a.
  • the indoor expansion valve 62 is inserted between the pipes a5 and a7, and has a function of adjusting the flow rate of the refrigerant flowing through the pipes a5 and a7 and depressurizing the refrigerant on the secondary side of the indoor expansion valve 62. doing.
  • the indoor heat exchanger 64 is a heat exchanger that exchanges heat between the indoor air sent from the indoor fan 66 and the refrigerant, and is connected to the indoor expansion valve 62 via a pipe a7.
  • the indoor unit 60 includes an indoor heat exchanger inlet air temperature sensor 70 (air condition sensor), an indoor heat exchanger exhaust air temperature sensor 72, an indoor heat exchanger inlet humidity sensor 74, and an indoor heat exchanger refrigerant liquid.
  • a temperature sensor 25 and an indoor heat exchanger refrigerant gas temperature sensor 26 are provided.
  • the indoor heat exchanger inlet air temperature sensor 70 detects the temperature of the air sucked by the indoor fan 66.
  • the indoor heat exchanger exhaust air temperature sensor 72 detects the temperature of the air exhausted from the indoor heat exchanger 64.
  • the indoor heat exchanger inlet humidity sensor 74 detects the humidity of the air sucked by the indoor fan 66. Further, the indoor heat exchanger refrigerant liquid temperature sensor 25 and the indoor heat exchanger refrigerant gas temperature sensor 26 are provided at a connection point between the indoor heat exchanger 64 and the pipe a6, and measure the temperature of the refrigerant flowing through the connection point. To detect.
  • the compressor 32, the four-way valve 34, the outdoor heat exchanger 36, the indoor expansion valve 62, the indoor heat exchanger 64, and the pipes a1 to a7 form a refrigeration cycle RC.
  • FIG. 2 is a side sectional view of the indoor unit 60.
  • the indoor unit 60 is a so-called “ceiling cassette type” that is buried in the ceiling 130 and exposes the lower surface to the air conditioning room.
  • the indoor heat exchanger 64 is formed in a plate shape bent in a substantially V-shape, and is installed at the center of the indoor unit 60.
  • the indoor fan 66 has fins arranged in a substantially cylindrical shape, and is disposed in front of the indoor heat exchanger 64. Below the indoor heat exchanger 64 and the indoor fan 66, a dew tray 140 for receiving condensed water is arranged below the indoor heat exchanger 64 and the indoor fan 66.
  • An inclined air filter 142 is provided behind the indoor heat exchanger 64.
  • the lower surface of the indoor unit 60 is covered with a decorative plate 143.
  • an air inlet 144 formed by cutting a slit in the decorative plate 143 is formed below the air filter 142.
  • the indoor heat exchanger inlet air temperature sensor 70 is provided between the indoor heat exchanger 64 and the air filter 142.
  • An air blowing passage 146 is formed in front of the indoor fan 66.
  • the left and right wind direction plates 148 are provided in the middle of the air blowing passage 146, and control the direction of the airflow in the left and right direction (perpendicular to the paper surface).
  • the vertical wind direction plate 150 is provided at the outlet of the air blowing passage 146, rotates around the fulcrum 150a, and controls the direction of the air flow in the vertical direction.
  • the left and right wind direction plates 148 and the upper and lower wind direction plates 150 are rotationally driven by the control device 20 (see FIG. 1).
  • the vertical wind direction plate 150 shown by a solid line in FIG. 2 indicates a position when the air conditioner is in a fully opened state.
  • the vertical wind direction plate 150 is rotated to the fully closed position 152 indicated by a dashed line. Further, when performing a cleaning operation described later, the vertical wind direction plate 150 is rotated to a position 156 indicated by a dashed line, and thereafter, is rotated to a cleaning operation position 154. And, as the opening degree of the vertical wind direction plate 150 increases, the pipe resistance of the air blowing passage 146 decreases. However, even when the vertical wind direction plate 150 is closed at the fully closed position 152, a gap FS is formed between the vertical wind direction plate 150 and the decorative plate 143, and there is a slight gap through the gap FS. The air flows.
  • the “cleaning operation” is executed automatically or according to a user's instruction.
  • the “cleaning operation” is an operation in which the surface of the indoor heat exchanger 64 is frosted or dewed and the surface of the indoor heat exchanger 64 is washed with the frosted or dewed water.
  • the case where the cleaning operation is automatically performed is, for example, a case where the cleaning operation is set to be periodically performed at predetermined time intervals.
  • the cleaning operation is classified into a “freezing cleaning operation” and a “condensation cleaning operation”.
  • the control device 20 switches the four-way valve 34 in the direction shown by the solid line so that the indoor heat exchanger 64 becomes an evaporator.
  • the control device 20 controls the air conditioner such as the rotation speed of the compressor 32, the opening degree of the indoor expansion valve 62, and the rotation speed of the indoor fan 66 so that the surface temperature of the indoor heat exchanger 64 is below freezing.
  • the state of each part of 100 is set. If this state is continued, frost will form on the surface of the indoor heat exchanger 64.
  • the control device 20 heats the indoor heat exchanger 64 by switching the four-way valve 34 in the direction shown by the broken line so that the indoor heat exchanger 64 becomes a condenser. Then, the frost attached to the indoor heat exchanger 64 melts, and the surface of the indoor heat exchanger 64 is washed away. After that, the control device 20 continues to heat the indoor heat exchanger 64 and drive the indoor fan 66 for a while. Thereby, the surface of the indoor heat exchanger 64 dries. Through the above steps, the freeze washing operation is completed.
  • control device 20 switches the four-way valve 34 in the direction shown by the solid line so that the indoor heat exchanger 64 becomes an evaporator.
  • control device 20 sets the state of each part of air conditioner 100 such that the surface temperature of indoor heat exchanger 64 is lower than the dew point temperature and higher than zero degrees.
  • dew forms on the surface of the indoor heat exchanger 64
  • the condensed water rinses the surface of the indoor heat exchanger 64.
  • the control device 20 switches the four-way valve 34 in the direction shown by the broken line so that the indoor heat exchanger 64 becomes a condenser, heats the indoor heat exchanger 64, and continues to drive the indoor fan 66.
  • the surface of the indoor heat exchanger 64 dries.
  • FIG. 3 is a flowchart of a cleaning operation processing routine according to the present embodiment. This routine is executed by the user's instruction on the remote controller 90 when the user instructs the execution of the cleaning operation or when it is time to execute the automatic operation of the cleaning operation.
  • step S101 when the process proceeds to step S101, the vertical wind direction plate 150 is opened to the position 156 shown in FIG.
  • step S102 the rotational drive of the indoor fan 66 is started.
  • step S104 the process waits for a predetermined time.
  • This predetermined time is a time when the temperature and humidity around the indoor heat exchanger inlet air temperature sensor 70 (see FIG. 2) and the indoor heat exchanger inlet humidity sensor 74 approach the temperature and humidity of the air conditioning room.
  • the predetermined time may be, for example, about 30 seconds or more and about 5 minutes or less.
  • the processing branches based on the range of the relative humidity H which is the detection result of the indoor heat exchanger inlet humidity sensor 74. More specifically, the process is branched based on the result of comparison between the relative humidity H and the constants H10, H12, H14, and H16. Note that these constants have a relationship of “H10 ⁇ H12 ⁇ H14 ⁇ H16”.
  • the constants H12 and H14 are the minimum value and the maximum value of the relative humidity in which it is preferable to perform the freeze washing operation.
  • the relative humidity H is less than the constant H12, the relative humidity H is too low. Therefore, even when the freeze cleaning operation is performed, a sufficient amount of frost does not form on the indoor heat exchanger 64, and sufficient cleaning is performed. The effect cannot be obtained.
  • the relative humidity H is too high, dew condensation may occur at locations other than the indoor heat exchanger 64 when performing the freeze washing operation. For example, when dew condensation occurs in the indoor fan 66 and the air outlet passage 146, there is a problem that the condensed water leaks into the air conditioning room via the air outlet passage 146.
  • the constant H14 is a value of the relative humidity H at which dew condensation occurring at a portion other than the indoor heat exchanger 64 does not cause much problem.
  • the range in which the relative humidity H satisfies “H12 ⁇ H ⁇ H14” is a preferable range in which the freeze washing operation is performed.
  • the constant H10 is a relative humidity at which it is considered difficult to cause a sufficient amount of water to condense on the indoor heat exchanger 64 in performing the dew condensation cleaning operation.
  • the constant H16 is a relative humidity at which dew condensation may occur in a portion other than the indoor heat exchanger 64 even when the dew-condensation cleaning operation is performed.
  • step S106 If the relative humidity H is in the range of “H12 ⁇ H ⁇ H14” in step S106, the process proceeds to step S110. If the relative humidity H is in the range of “H10 ⁇ H ⁇ H12” or “H14 ⁇ H ⁇ H16”, the process proceeds to step S120. If the relative humidity H is in the range of “others”, that is, “H ⁇ H10” or “H16 ⁇ H”, the process proceeds to step S130.
  • step S110 the process branches based on the range of the room temperature T which is the detection result of the indoor heat exchanger inlet air temperature sensor 70. More specifically, the process branches based on a comparison result between the room temperature T and the constants T10, T12, T14, and T16. Note that these constants have a relationship of “T10 ⁇ T12 ⁇ T14 ⁇ T16”.
  • step S112 If the room temperature T is in the range of “T10 ⁇ T ⁇ T12”, the process proceeds to step S112, and the “freezing and cleaning operation F1” is executed. If the room temperature T is in the range of “T12 ⁇ T ⁇ T14”, the process proceeds to step S114, and the “freezing and cleaning operation F2” is executed. If the room temperature T is in the range of “T14 ⁇ T ⁇ T16”, the process proceeds to step S116, and the “freezing and cleaning operation F3” is executed. In other cases, that is, when the room temperature T is less than the constant T10 or exceeds T16, the process proceeds to step S130.
  • the constant T10 is a value near 0 ° C., for example, a value of about 1 ° C. to 6 ° C.
  • a drain pipe, a drain pump, and the like (not shown) for discharging dew water are attached to the dew receiving tray 140 (see FIG. 2) of the indoor unit 60. If there is a location where the temperature of the condensed water becomes 0 ° C. or less, the drain pipe or the like is clogged at that location. Therefore, the constant T10 is set to a value of about 1 ° C. to 6 ° C. with some allowance for “0 ° C.”, and the cleaning operation is stopped when the room temperature T becomes less than the constant T10.
  • the constant T16 may be set to a temperature at which the indoor heat exchanger 64 can be sufficiently frosted.
  • the operation contents of the freezing / cleaning operations F1, F2, and F3 are set so that the cooling capacity increases as the range of the room temperature T increases. More specifically, assuming that the rotation speeds of the compressors 32 (see FIG. 1) in the freeze washing operations F1, F2, and F3 are NF1, NF2, and NF3, respectively, these rotation speeds are "NF1 ⁇ NF2 ⁇ NF3". Have a relationship. In any of the freeze washing operations F1, F2, and F3, the control device 20 sets the position of the vertical wind direction plate 150 to the washing operation position 154 (see FIG. 2).
  • step S120 the process branches based on the range of the room temperature T. More specifically, the process branches based on a comparison result between the room temperature T and the constants T20, T22, T24, and T26. Note that these constants have a relationship of “T20 ⁇ T22 ⁇ T24 ⁇ T26”.
  • step S122 If the room temperature T is in the range of “T20 ⁇ T ⁇ T22”, the process proceeds to step S122, and the “condensation cleaning operation C1” is executed. If the room temperature T is in the range of “T22 ⁇ T ⁇ T24”, the process proceeds to step S124, and the “condensation cleaning operation C2” is executed. If the room temperature T is in the range of “T24 ⁇ T ⁇ T26”, the process proceeds to step S126, and the “condensation cleaning operation C3” is executed. In other cases, that is, when the room temperature T is less than the constant T20 or exceeds T26, the process proceeds to step S130.
  • the constant T20 is a value of, for example, about 1 ° C. to 6 ° C., like the constant T10 described above.
  • the constant T20 may be the same as the constant T10.
  • the constant T26 may be set to a temperature at which the indoor heat exchanger 64 can be sufficiently condensed. Therefore, the constant T26 may be higher than the constant T16 described above.
  • the operation contents of the dew condensation cleaning operations C1, C2, and C3 are set such that the higher the range of the room temperature T, the higher the cooling capacity. More specifically, assuming that the rotation speeds of the compressors 32 (see FIG. 1) in the dew washing operation C1, C2, and C3 are NC1, NC2, and NC3, respectively, these rotation speeds are “NC1 ⁇ NC2 ⁇ NC3”. Have a relationship. In addition, since the condensation cleaning operation has a lower cooling capacity than the freeze cleaning operation, when the rotation speeds NF1, NF2, and NF3 during the freeze cleaning operation described above are also combined, these rotation speeds are "NC1 ⁇ NC2 ⁇ NC3 ⁇ NF1". ⁇ NF2 ⁇ NF3 ”. Further, in any of the dew-washing operations C1, C2, and C3, the control device 20 sets the position of the vertical wind direction plate 150 to the washing operation position 154 (see FIG. 2).
  • step S130 the control device 20 executes a cleaning operation stop process. That is, control device 20 stops refrigeration cycle RC, stops indoor fan 66, and rotates vertical wind direction plate 150 to fully closed position 152 (see FIG. 2).
  • control device 20 stops refrigeration cycle RC, stops indoor fan 66, and rotates vertical wind direction plate 150 to fully closed position 152 (see FIG. 2).
  • the “watching operation” means that the cooling operation is automatically executed when the temperature of the air conditioning room becomes equal to or higher than a predetermined temperature.
  • the control device 20 performs the “room temperature acquisition process” every predetermined monitoring period during the period in which the refrigeration cycle RC is stopped. Is performed.
  • the "room temperature acquisition process” means that the indoor fan 66 is driven for a predetermined time to take in the air in the air-conditioned room into the indoor unit 60 and acquire the detection result of the indoor heat exchanger inlet air temperature sensor 70 as the room temperature T. Point.
  • the control device 20 determines whether or not the acquired room temperature T is equal to or higher than a predetermined temperature, and executes the cooling operation when the determination result is “yes”.
  • the “room temperature acquisition process” in the “watching operation” is different from the cleaning operation (see FIG. 3) in that the indoor fan 66 is driven to take in the air in the air-conditioned room into the indoor unit 60 to acquire the room temperature T.
  • This is similar to the processing in steps S101, S102, S104, and S106.
  • step S101 of the washing operation the vertical wind direction plate 150 is opened to the position 156 (see FIG. 2), whereas in the “watching operation” “room temperature acquisition processing”, the vertical wind direction plate 150 is opened.
  • the vertical wind direction plate 150 is opened.
  • the drive time of the indoor fan 66 in the cleaning operation (the standby time in step S104) is longer than the drive time of the indoor fan 66 in the room temperature acquisition process in the watching operation. Further, the rotation speed of the indoor fan 66 in the cleaning operation (the rotation speed in step S104) is higher than the rotation speed of the indoor fan 66 in the room temperature acquisition processing in the watching operation.
  • the processing in steps S101 to S106 in the cleaning operation is performed in such a manner that the room opening of the indoor fan 66 is long, the rotation speed of the indoor fan 66 is high, and the room temperature of the watching operation is high.
  • the processing is different.
  • One of the reasons why such a difference has occurred is that only the room temperature T needs to be acquired in the room temperature acquisition process of the watching operation, and the relative humidity H does not need to be measured.
  • the inside of the indoor unit 60 is dry, it is necessary to adjust the relative humidity inside the indoor unit 60 to the relative humidity of the air conditioning room, as compared with the case where only the temperature is adjusted. It is preferable to increase the driving time.
  • the control device (20) controls the function (S102, S104) of driving the indoor fan (66) for a predetermined time and the indoor fan (66) before performing the cleaning operation.
  • the detection result of the air condition sensor (70, 74) can be made accurate, and the cleaning operation can be appropriately performed.
  • the predetermined time is a time of 30 seconds or more, and when detecting whether or not the detection result of the air condition sensor (70, 74) is within the first predetermined range, the indoor fan (66) Drive is continuing. Thereby, the detection result of the air condition sensor (70, 74) can be made more accurate, and the cleaning operation can be executed more appropriately.
  • the control device (20) further has a function (S101) of setting the vertical wind direction plate (150) to an open state rather than a closed state within a predetermined time period.
  • a function (S101) of setting the vertical wind direction plate (150) to an open state rather than a closed state within a predetermined time period As a result, the flow of air in the air conditioner (100) can be promoted, the detection results of the air condition sensors (70, 74) can be made more accurate, and the cleaning operation can be performed more appropriately. be able to.
  • the control device (20) has a watching operation function of automatically executing the cooling operation according to the detection result of the air condition sensor (70, 74) after rotating the indoor fan (66), and performs the cleaning operation. Before the execution, the rotation speed at which the indoor fan (66) is rotated is higher than the rotation speed at which the indoor fan (66) is rotated before performing the watching operation function. As a result, the detection result of the air condition sensor (70, 74) can be made more accurate as compared to when the watching operation is executed, and the cleaning operation can be executed more appropriately.
  • control device (20) sets the rotation speed of the compressor (32) based on the detection result of the air condition sensor (70, 74) after driving the indoor fan (66) (S110, S120). ). Thereby, an appropriate cooling capacity can be given to the air conditioner (100) according to a situation.
  • control device (20) performs a freezing / cleaning operation for frosting the indoor heat exchanger (64) based on the detection result of the air condition sensor (70, 74) after driving the indoor fan (66), or It further has a function (S106) of selecting one of the dew-condensation washing operations for dew condensation without causing frost formation on the indoor heat exchanger (64). Thereby, an appropriate side can be selected from the freeze washing operation and the dew washing operation depending on the situation.
  • step S12 when the process proceeds to step S12, it is determined whether or not the relative humidity H, which is the detection result of the indoor heat exchanger inlet humidity sensor 74, satisfies the condition of “H60 ⁇ H ⁇ H62”. However, at this time, since the indoor fan 66 is not driven, the relative humidity H may be different from the actual relative humidity in the air conditioning room.
  • H60 and H62 are predetermined constants.
  • the constant H60 is slightly lower than the constant H10 described in step S106 of FIG. Further, the constant H62 is slightly higher than the constant H16 described in step S106. That is, the range of the constants H60 to H62 is wider than the range of the constants H10 to H16.
  • step S12 the process proceeds to step S14, and whether the outside air temperature TD that is the detection result of the outdoor heat exchanger inlet temperature sensor 51 satisfies the condition of “TD0 ⁇ TD ⁇ TD2” It is determined whether or not.
  • TD0 and TD2 are predetermined constants.
  • the constant TD0 is a value near 0 ° C., for example, about 1 ° C. to 6 ° C., like the constants T10 and T20 described in steps S110 and S120. If the outside air temperature is too high, there is a possibility that the cooling capacity cannot be secured to such an extent that the indoor heat exchanger 64 can be sufficiently frosted or dewed.
  • the constant TD2 may be set to a temperature at which the indoor heat exchanger 64 can be sufficiently frosted or dewed.
  • step S14 determines whether the room temperature T detected by the indoor heat exchanger inlet air temperature sensor 70 satisfies the condition “T80 ⁇ T ⁇ T82”. Is determined. However, at this time, since the indoor fan 66 is not driven, the room temperature T may be apart from the actual room temperature in the air-conditioning room, as in the case of the relative humidity H described above.
  • T80 and T82 are predetermined constants.
  • the constant T80 is a value near 0 ° C., but is set to a value lower than the constants T10 and T20 described in steps S110 and S120. Further, the constant T82 is set to a value higher than the constant T26 described in step S120. That is, the range of the constants T80 to T82 is wider than the range of the constants T10 to T20.
  • step S16 If “Yes” is determined in step S16, the same processing as in step S100 and subsequent steps in FIG. 3 is executed. On the other hand, if “No” is determined in any of steps S12, S14, and S16, the process proceeds to step S20. Here, the control device 20 executes the cleaning operation stop processing, and the processing of this routine ends.
  • the indoor fan (70, 74) before driving the indoor fan (66), the indoor fan (70, 74) must detect the air condition sensor (70, 74) within the second predetermined range. 66) (S12 to S16). Further, the second predetermined range is wider than the first predetermined range. Accordingly, when the detection result of the air condition sensor (70, 74) is not within the second predetermined range, electric power for moving the indoor fan (66) becomes unnecessary, and energy can be saved.
  • step S130 is executed without performing the freeze washing operation or the dew washing operation. In this case, the user may be suspicious that “a failure has occurred in the air conditioner (100)”.
  • the indoor fan (66) is driven once, it is possible to increase the possibility that the freeze cleaning operation or the dew condensation cleaning operation is performed, and reduce the frequency of suspicion of the user. it can.
  • FIG. 5 a cleaning operation processing routine shown in FIG. 5 is executed instead of the cleaning operation processing routine shown in FIG. This routine is also executed by the remote controller 90 (see FIG. 1) when the user instructs the execution of the cleaning operation or when the automatic cleaning execution operation timing comes.
  • step S150 the process branches based on the range of the room temperature T which is the detection result of the indoor heat exchanger inlet air temperature sensor 70. More specifically, the process branches based on a comparison result between the room temperature T and the constants T50, T52, T54, T56, T58, T60, and T62. Note that these constants have a relationship of “T50 ⁇ T52 ⁇ T54 ⁇ T56 ⁇ T58 ⁇ T60 ⁇ T62”.
  • step S152 If the room temperature T is in the range of “T50 ⁇ T ⁇ T52”, the process proceeds to step S152, and the “condensation cleaning operation C1” is executed. If the room temperature T is in the range of “T52 ⁇ T ⁇ T54”, the process proceeds to step S154, and the “condensation cleaning operation C2” is executed. If the room temperature T is in the range of “T54 ⁇ T ⁇ T56”, the process proceeds to step S156, and the “freezing and cleaning operation F1” is executed.
  • step S158 If the room temperature T is in the range of “T56 ⁇ T ⁇ T58”, the process proceeds to step S158, and the “freezing / cleaning operation F2” is executed. If the room temperature T is in the range of “T58 ⁇ T ⁇ T60”, the process proceeds to step S160, and the “freezing and cleaning operation F3” is executed. If the room temperature T is in the range of “T60 ⁇ T ⁇ T62”, the process proceeds to step S162, and the “condensation cleaning operation C3” is executed. In other cases, that is, when the room temperature T is less than the constant T50 or exceeds T62, the process proceeds to step S170.
  • step S170 The contents of the dew condensation cleaning operations C1 to C3 and the freeze cleaning operations F1 to F3 executed in steps S152 to S162 are the same as those of the first embodiment.
  • control device 20 executes a cleaning operation stop process.
  • the content of the stop processing is the same as that in step S130 (see FIG. 3) of the first embodiment, and the control device 20 stops the refrigeration cycle RC, stops the indoor fan 66, and sets the vertical wind direction plate 150 It is rotated to the fully closed position 152 (see FIG. 2). If it is determined as “other” in step S150 described above, the freeze cleaning operation or the dew condensation cleaning operation is not performed, and the stop processing in step S170 is performed. Thus, the processing of this routine ends.
  • the determination based on the relative humidity is not performed. This is based on the fact that the temperature and the relative humidity have a correlation corresponding to the area where the air conditioner 100 is installed. For example, assume that the air conditioner 100 is set to Japan. Considering Japan's climate, temperatures tend to be low in winter and high in summer. At the same time, relative humidity tends to be low in winter and high in summer. Then, the relative humidity has a monotonically increasing correlation with the temperature.
  • the relative humidity H is also a preferable range for the freeze-cleaning operation.
  • F1 to F3 are executed. If the room temperature T is in the range of “T50 ⁇ T ⁇ T54” or “T60 ⁇ T ⁇ T62” above and below, the relative humidity H can be estimated to be a preferable range for the dew condensation cleaning operation. , The dew condensation cleaning operations C1 to C3 are being executed.
  • the detection result of the indoor heat exchanger inlet air temperature sensor 70 can be made accurate, and the cleaning operation can be appropriately performed. it can. Further, in the processing of steps S140 to S170 of the present embodiment, since the determination based on the relative humidity is not performed, the indoor heat exchanger inlet humidity sensor 74 shown in FIGS. 1 and 2 can be omitted, and the air conditioning The cost of the machine 100 can be reduced.
  • step S140 before executing the processing of step S140, the same processing as steps S14, S16, and S20 of the above-described second embodiment (see FIG. 4) may be executed.
  • the processing after step S140 is executed, and when “No” is determined in any of steps S14 and S16, the stop of step S20 is performed.
  • the processing may be executed.
  • the present invention is not limited to the embodiments described above, and various modifications are possible.
  • the above-described embodiments are exemplarily illustrated for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described above.
  • a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of one embodiment can be added to the configuration of another embodiment.
  • a part of the configuration of each embodiment can be deleted, or another configuration can be added or replaced.
  • the control lines and information lines shown in the figure indicate those which are considered necessary for the description, and do not necessarily indicate all the control lines and information lines necessary for the product. In fact, it can be considered that almost all components are connected to each other. Possible modifications to the above embodiment are, for example, as follows.
  • the cooling capacity that is, the rotation speed of the compressor 32
  • the rotational speed of the compressor 32 is set in accordance with the room temperature T.
  • the rotational speed of the compressor 32 is feedback-controlled so that an appropriate refrigerant temperature can be realized based on the detection value of the indoor heat exchanger refrigerant liquid temperature sensor 25 or the indoor heat exchanger refrigerant gas temperature sensor 26. Good.
  • FIGS. 3 to 5 has been described as software processing using a program in the above embodiment, a part or all of the processing is ASIC (Application Specific Integrated Circuit); Alternatively, the processing may be replaced by hardware-based processing using an FPGA (Field Programmable Gate Array) or the like.
  • ASIC Application Specific Integrated Circuit
  • FPGA Field Programmable Gate Array
  • the present invention is suitable for use in a ceiling cassette type indoor unit in which a difference between the environment of the air-conditioning room and the environment in the indoor unit is likely to occur, but is not limited by the type of the indoor unit.
  • the present invention may be applied to a wall-mounted indoor unit or a window-type air conditioner in which an indoor unit and an outdoor unit are integrated.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Human Computer Interaction (AREA)
  • Air Conditioning Control Device (AREA)
PCT/JP2018/037443 2018-10-05 2018-10-05 空気調和機、空気調和機の制御方法およびプログラム WO2020070891A1 (ja)

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EP18903046.3A EP3862643A4 (de) 2018-10-05 2018-10-05 Klimaanlage, verfahren zur steuerung einer klimaanlage und programm
JP2019500680A JP6498374B1 (ja) 2018-10-05 2018-10-05 空気調和機、空気調和機の制御方法およびプログラム
CN201880047517.2A CN111279134A (zh) 2018-10-05 2018-10-05 空调机、空调机的控制方法以及程序
PCT/JP2018/037443 WO2020070891A1 (ja) 2018-10-05 2018-10-05 空気調和機、空気調和機の制御方法およびプログラム
MYPI2019005752A MY201435A (en) 2018-10-05 2018-10-05 Air-conditioner, method of controlling air-conditioner, and program
TW108135920A TWI720637B (zh) 2018-10-05 2019-10-03 空調機

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