WO2021095422A1 - Climatiseur - Google Patents

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Publication number
WO2021095422A1
WO2021095422A1 PCT/JP2020/038651 JP2020038651W WO2021095422A1 WO 2021095422 A1 WO2021095422 A1 WO 2021095422A1 JP 2020038651 W JP2020038651 W JP 2020038651W WO 2021095422 A1 WO2021095422 A1 WO 2021095422A1
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WO
WIPO (PCT)
Prior art keywords
temperature
air
heat exchanger
control device
indoor
Prior art date
Application number
PCT/JP2020/038651
Other languages
English (en)
Japanese (ja)
Inventor
脩 三浦
恵介 西谷
Original Assignee
ダイキン工業株式会社
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 ダイキン工業株式会社 filed Critical ダイキン工業株式会社
Priority to CN202080077987.0A priority Critical patent/CN114667421B/zh
Publication of WO2021095422A1 publication Critical patent/WO2021095422A1/fr

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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
    • F24F11/62—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
    • F24F11/67—Switching between heating and cooling modes
    • 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
    • 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
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles

Definitions

  • This disclosure relates to an air conditioner.
  • Patent Document 1 discloses an air conditioner having a function of suppressing the growth of mold and bacteria.
  • the ventilation operation and the heating operation are executed in order.
  • dew condensation water is generated on the surface of the indoor heat exchanger.
  • the compressor is stopped and the indoor blower is operated.
  • the air carried by the indoor blower dries the indoor heat exchanger.
  • the indoor heat exchanger functions as a condenser and the indoor blower operates.
  • the indoor heat exchanger is further dried by the refrigerant inside it.
  • the air conditioner of Patent Document 1 performs a heating operation in order to dry the utilization heat exchanger (indoor heat exchanger).
  • the air heated by the heating operation is supplied to the target space by a blower. Therefore, in an environment where the temperature is high, the high temperature air is supplied to the target space, which makes people in the target space feel uncomfortable.
  • the purpose of the present disclosure is to prevent people in the target space from feeling uncomfortable in the operation of drying the heat exchanger used.
  • the first aspect of the present disclosure is a refrigerant circuit (11) including a compressor (21), a heat source heat exchanger (22), and a utilization heat exchanger (53) in which a refrigeration cycle is performed, and the utilization heat exchanger.
  • a utilization unit (40) provided with (53) and having a blower (52) for supplying air passing through the utilization heat exchanger (53) to the target space, and the utilization heat exchanger (53) as an evaporator.
  • the refrigerant circuit (11) so as to perform the first operation of generating condensed water or ice and the second operation of heating the air using the utilization heat exchanger (53) as a radiator after the completion of the first operation.
  • a control device (C) for controlling the blower (52), and the control device (C) is provided when the outdoor temperature is higher than the first temperature or the indoor temperature is higher than the second temperature. , Perform the limiting process for limiting the second operation.
  • the control device (C) controls the refrigerant circuit (11) and the blower (52) to perform the first operation and the second operation.
  • the utilization heat exchanger (53) is used as an evaporator to generate condensed water or ice.
  • the air is heated by using the utilization heat exchanger (53) as a radiator after the completion of the first operation. Then, when the outdoor temperature is higher than the first temperature, or when the indoor temperature is higher than the second temperature, the limiting process for limiting the second operation is performed.
  • control device (C) performs the first operation and the first operation after the end of the air conditioning operation for air-conditioning the target space by the utilization heat exchanger (53).
  • the second operation is executed in order.
  • the first operation and the second operation are continuously executed in order.
  • a third aspect of the present disclosure is the first or second aspect, wherein the control device (C) is the first after the end of the air conditioning operation for air-conditioning the target space by the utilization heat exchanger (53).
  • the operation, the third operation of operating the blower (52) with the utilization heat exchanger (53) stopped, and the second operation are executed in order.
  • the first operation after the end of the air conditioning operation for air-conditioning the target space, the first operation, the third operation in which the blower (52) is operated with the heat exchanger (53) stopped, and the second operation are continued.
  • the operations are carried out in sequence.
  • control device (C) has the outdoor temperature higher than the first temperature and the indoor temperature is the first. When the temperature is higher than 2 temperatures, the restriction treatment is performed.
  • the limiting process is performed when the outdoor temperature is higher than the first temperature and the indoor temperature is higher than the second temperature.
  • the second operation is not performed in the restriction process.
  • the second operation is not performed in the restriction process.
  • a sixth aspect of the present disclosure is, in any one of the first to fifth aspects, in the limiting process, the execution time of the second operation is set to the second operation when the limiting process is not performed. Make it shorter than the execution time of.
  • the execution time of the second operation is made shorter than the execution time of the second operation when the limiting process is not performed.
  • the utilization heat exchanger (53) is stopped without performing the second operation. In this state, the third operation of operating the blower (52) is performed.
  • the third operation of operating the blower (52) is performed instead of the second operation.
  • the utilization heat exchanger (53) can be dried in a high temperature environment without supplying high temperature air to the target space.
  • the first blower operation and the second blower operation in which the air volume is smaller than that of the first blower operation are performed.
  • the first blower operation and the second blower operation are performed.
  • the blast is performed with a smaller air volume than in the first blast operation.
  • the ninth aspect of the present disclosure further includes a notification unit (80) for notifying that the restriction processing is in progress in any one of the first to eighth aspects.
  • the notification unit (80) notifies that the restriction processing is in progress.
  • the user can grasp that the utilization unit (40) is in the process of restriction processing.
  • a tenth aspect of the present disclosure is, in any one of the first to ninth aspects, the control device (C) performs an air conditioning operation for air-conditioning the target space by the utilization heat exchanger (53).
  • the air-conditioning operation includes a heating operation in which the air heated by the heat exchanger (53) used as a radiator is supplied to the target space, and the control device (C) has the outdoor temperature of the third temperature. When it is higher than, the heating operation is restricted, and the first temperature is lower than the third temperature.
  • the air conditioning operation includes a heating operation in which the air heated by the heat exchanger (53) used as a radiator is supplied to the target space.
  • the control device (C) limits the heating operation when the outdoor temperature is higher than the third temperature.
  • the first temperature which is a temperature condition that limits the second operation, is lower than the third temperature.
  • the control device (C) performs an air conditioning operation for air-conditioning the target space by the utilization heat exchanger (53).
  • the air-conditioning operation includes a heating operation in which the air heated by the heat exchanger (53) used as a radiator is supplied to the target space, and the control device (C) has a fourth temperature in the room. When it is higher than, the heating operation is restricted, and the second temperature is lower than the fourth temperature.
  • the air conditioning operation includes a heating operation in which the air heated by the heat exchanger (53) used as a radiator is supplied to the target space.
  • the control device (C) limits the heating operation when the room temperature is higher than the fourth temperature.
  • the second temperature which is a temperature condition that limits the second operation, is lower than the fourth temperature.
  • FIG. 1 is an overall configuration diagram of an air conditioner according to the first embodiment.
  • FIG. 2 is a piping system diagram of the air conditioner.
  • FIG. 3 is a vertical cross-sectional view showing the internal structure of the indoor unit.
  • FIG. 4 is an enlarged view of the vicinity of the air outlet of the indoor unit, and shows a state in which the flap is in the closed position.
  • FIG. 5 is an enlarged view of the vicinity of the air outlet of the indoor unit, and shows a state in which the flap is in the horizontal air outlet position.
  • FIG. 6 is a schematic configuration diagram of a drain pan and a drainage channel.
  • FIG. 7 is a block diagram showing a control device and a device connected to the control device via a communication line.
  • FIG. 8 is a time chart showing the air conditioning operation and the operation of each device in the first mode.
  • FIG. 9 is a flowchart relating to the determination before the start of the first mode.
  • FIG. 10 is a flowchart relating to the determination during the first operation.
  • FIG. 11 is a flowchart relating to the determination during the third operation.
  • FIG. 12 is a flowchart relating to the determination during the second operation.
  • FIG. 13 is a flowchart relating to the determination during the drainage operation.
  • FIG. 14 is a flowchart relating to the determination at the time of the first operation of the second embodiment.
  • FIG. 15 is a flowchart relating to the determination at the time of the third operation during the restriction processing.
  • Embodiment 1 >> ⁇ Overall configuration of air conditioner>
  • the air conditioner (10) regulates the temperature of the air in the target space.
  • the target space of this example is an indoor space.
  • the air conditioner (10) performs a cooling operation, a heating operation, and a dehumidifying operation.
  • the air conditioner (10) performs the first mode.
  • the first mode is an operation for cleaning the indoor heat exchanger (53).
  • the air conditioner (10) includes an outdoor unit (20), an indoor unit (40), a liquid communication pipe (12), and a gas communication pipe (13).
  • the outdoor unit (20) and the indoor unit (40) are connected to each other via a liquid connecting pipe (12) and a gas connecting pipe (13). By connecting these, the refrigerant circuit (11) is configured.
  • the refrigerant circuit (11) is filled with refrigerant.
  • the refrigerant of this example is difluoromethane.
  • the refrigerant circuit (11) performs a vapor compression refrigeration cycle.
  • the refrigerant circuit (11) mainly has a compressor (21), an outdoor heat exchanger (22), an expansion valve (23), an indoor heat exchanger (53), and a four-way switching valve (25). ..
  • the outdoor unit (20) is installed outdoors. As shown in FIG. 2, the outdoor unit (20) includes a compressor (21), an outdoor heat exchanger (22), an expansion valve (23), a four-way switching valve (25), and an outdoor fan (26). And have.
  • the compressor (21) sucks in low-pressure gas refrigerant and compresses it.
  • the compressor (21) discharges the compressed refrigerant.
  • the compressor (21) is a variable capacitance type in which electric power is supplied from an inverter circuit to an electric motor. In other words, the compressor (21) is configured so that the operating frequency (rotational speed) of the electric motor can be adjusted.
  • the outdoor heat exchanger (22) corresponds to the heat source heat exchanger.
  • the outdoor fan (26) carries the outdoor air that passes through the outdoor heat exchanger (22).
  • the outdoor heat exchanger (22) exchanges heat between the outdoor air carried by the outdoor fan (26) and the refrigerant.
  • the expansion valve (23) corresponds to the pressure reducing mechanism.
  • the expansion valve (23) depressurizes the refrigerant.
  • the expansion valve (23) is an electric expansion valve whose opening degree can be adjusted.
  • the decompression mechanism may be a temperature-sensitive expansion valve, an expander, a capillary tube, or the like.
  • the expansion valve (23) may be provided in the indoor unit (40) as long as it is connected to the liquid communication pipe (12) of the refrigerant circuit (11).
  • the four-way switching valve (25) has a first port (P1), a second port (P2), a third port (P3), and a fourth port (P4).
  • the first port (P1) is connected to the discharge portion of the compressor (21).
  • the second port (P2) is connected to the suction part of the compressor (21).
  • the third port (P3) is connected to the gas end of the outdoor heat exchanger (22).
  • the fourth port (P4) is connected to the gas connecting pipe (13).
  • the four-way switching valve (25) switches between the first state (the state shown by the solid line in FIG. 2) and the second state (the state shown by the broken line in FIG. 2).
  • the four-way switching valve (25) in the first state communicates the first port (P1) and the third port (P3), and communicates the second port (P2) and the fourth port (P4).
  • the four-way switching valve (25) in the second state communicates the first port (P1) and the fourth port (P4) and communicates the second port (P2) and the third port (P3).
  • the refrigerant circuit (11) performs the first refrigeration cycle and the second refrigeration cycle according to the switching of the four-way switching valve (25).
  • the first refrigeration cycle is a refrigeration cycle in which the indoor heat exchanger (53) is used as an evaporator.
  • the second refrigeration cycle is a refrigeration cycle in which the indoor heat exchanger (53) is used as a radiator.
  • the outdoor unit (20) has a discharge pressure sensor (27), a discharge temperature sensor (28), a suction temperature sensor (29), an outside air temperature sensor (30), and a first refrigerant temperature sensor (31). ..
  • the discharge pressure sensor (27) detects the pressure of the high-pressure medium discharged from the compressor (21).
  • the suction temperature sensor (29) detects the pressure of the low pressure refrigerant sucked into the compressor (21).
  • the outside air temperature sensor (30) detects the temperature of the outdoor air.
  • the first refrigerant temperature sensor (31) detects the temperature of the refrigerant inside the outdoor heat exchanger (22).
  • the indoor unit (40) is installed indoors. As shown in FIG. 3, the indoor unit (40) is a ceiling-mounted type installed on the ceiling. Specifically, the indoor unit (40) is a ceiling-suspended type that is suspended from a beam behind the ceiling. More specifically, it is a ceiling-embedded type that is embedded in the ceiling surface. The indoor unit (40) corresponds to the unit used.
  • the indoor unit (40) includes a casing (41), a filter (50), a bell mouth (51), an indoor fan (52), an indoor heat exchanger (53), a drain pan (54), and wind direction adjustment. It has a part (55).
  • the casing (41) has a casing body (42) and a panel (43).
  • the casing body (42) is formed in a rectangular box shape having an open surface formed on the lower side.
  • the panel (43) is detachably provided on the opening surface of the casing body (42).
  • the panel (43) has a rectangular frame-shaped panel main body (44) in a plan view and a suction grill (45) provided in the center of the panel main body (44).
  • One suction port (46) is formed in the center of the panel body (44).
  • the suction grill (45) is attached to the suction port (46).
  • One outlet (47) is formed on each of the four side edges of the panel body (44). Each outlet (47) extends along the four side edges. Inside the casing (41), an air passage (48) is formed between the suction port (46) and the air outlet (47). Auxiliary outlets are formed at each of the four corners of the panel (43) so as to be continuous with each outlet (47).
  • the filter (50) is placed above the suction grill (45).
  • the filter (50) is located upstream of the indoor heat exchanger (53) in the air passage (48).
  • the filter (50) collects dust in the suction air, which is the air sucked from the suction port (46).
  • the bell mouth (51) is placed above the filter (50). Bellmouth (51) rectifies the intake air.
  • the indoor fan (52) is located above the bell mouth (51).
  • the indoor fan (52) is located upstream of the indoor heat exchanger (53) in the air passage (48).
  • the indoor fan (52) corresponds to the blower.
  • the indoor fan (52) is a centrifugal type.
  • the indoor fan (52) carries air passing through the indoor heat exchanger (53).
  • the indoor fan (52) conveys the air sucked from the bell mouth (51) side outward in the radial direction.
  • the indoor fan (52) is configured so that the air volume can be switched in 4 stages. Specifically, these four stages of air volume are, in order from the smallest air volume, a light air volume (LL), a small air volume (L), a medium air volume (M), and a large air volume (H).
  • the control device (C) controls the air volume of the indoor fan (52) between these four stages of air volume.
  • the indoor heat exchanger (53) is placed around the indoor fan (52).
  • the indoor heat exchanger (53) is bent along the four sides of the casing body (42).
  • the indoor heat exchanger (53) corresponds to the utilization heat exchanger.
  • the air conveyed by the indoor fan (52) exchanges heat with the refrigerant.
  • the drain pan (54) is located under the indoor heat exchanger (53).
  • the drain pan (54) receives the condensed water generated inside the casing (41) of the indoor unit (40).
  • the wind direction adjusting unit (55) adjusts the wind direction of the blown air, which is the air blown from the outlet (47).
  • the wind direction adjusting unit (55) has a motor (not shown), a shaft (56) connected to the motor, and a flap (57) that rotates with the rotation of the shaft (56).
  • the flap (57) is formed in the shape of a long plate extending along the side edge of the panel body (44) or the longitudinal direction of the air outlet (47).
  • the shape of the vertical cross section of the flap (57) is substantially arcuate.
  • the flap (57) opens and closes the air outlet (47).
  • the flap (57) is configured so that the tilt angle can be changed stepwise.
  • the position where the flap (57) of this example is adjusted includes six positions. These six positions include the closed position shown in FIG. 4 and the five open positions. The five open positions include the horizontal blowout position shown in FIG. The flap (57) in the closed position substantially closes the outlet (47). A gap may be formed between the flap (57) in the closed position and the air outlet (47).
  • the flap (57) at the horizontal blowing position blows out the blown air in the almost horizontal direction.
  • the horizontal blow-out position is the position where the change in angle from the closed position of the flap (57) is minimized.
  • the indoor unit (40) has a drain pump (58) and a drainage channel (70).
  • the drain pump (58) corresponds to the pump that discharges the water in the drain pan (54).
  • the drain pump (58) discharges the water in the drain pan (54) to the outside of the casing (41) via the drainage channel (70).
  • the drainage channel (70) of this example includes a first rising portion (70a), a first relay portion (70b), a second relay portion (70c), a second rising portion (70d), and an inclined portion (70e). ..
  • the first rising portion (70a) and the first relay portion (70b) are arranged inside the casing (41).
  • the second relay portion (70c), the second rising portion (70d), and the inclined portion (70e) are arranged outside the casing (41).
  • the first rising part (70a) extends upward from the drain pump (58).
  • the first riser (70a) extends upward toward the downstream side of the water pumped by the drain pump (58).
  • the first relay portion (70b) extends substantially horizontally from the upper end portion of the first rising portion (70a).
  • the second relay section (70c) is composed of a flexible hose.
  • the second relay portion (70c) is connected to the first relay portion (70b) via a clamp metal fitting.
  • the second relay section (70c) extends substantially horizontally.
  • the second rising portion (70d) extends upward from the end of the second relay portion (70c).
  • the second riser (70d) extends upward toward the downstream side of the water pumped by the drain pump (58).
  • the ramp (70e) is composed of a flexible hose.
  • the inclined portion (70e) extends diagonally downward from the upper end of the second rising portion (70d).
  • the drain pump (58) is stopped, the water inside the inclined portion (70e) flows downward due to its own weight.
  • the first rising portion (70a) and the second rising portion (70d) are provided to secure a lift for flowing water in the inclined portion (70e) by its own weight.
  • the indoor unit (40) has an inside air temperature sensor (61), an inside air humidity sensor (62), and a second refrigerant temperature sensor (63).
  • the inside air temperature sensor (61) detects the temperature of the indoor air in the target space as the indoor temperature (T1).
  • the air temperature (T1) is the temperature of the sucked air.
  • the inside air humidity sensor (62) detects the humidity of the indoor air in the target space as the indoor humidity (R1).
  • Indoor humidity (R1) is the humidity of the intake air.
  • the inside air humidity sensor (62) of this example detects the absolute humidity of the room air.
  • the inside air humidity sensor (62) may detect the relative humidity of the room air.
  • the second refrigerant temperature sensor (63) detects the temperature of the refrigerant in the indoor heat exchanger (53).
  • the second refrigerant temperature sensor (63) detects the evaporation temperature (Te) of the indoor heat exchanger (53) that functions as an evaporator.
  • the second refrigerant temperature sensor (63) detects the condensation temperature (Tc) of the indoor heat exchanger (53) that functions as a radiator.
  • the evaporation temperature (Te) may be determined by the saturation temperature corresponding to the low pressure of the refrigerant.
  • the condensation temperature (Tc) may be determined by the saturation temperature corresponding to the high pressure of the refrigerant.
  • the second refrigerant temperature sensor (63) also serves as a sensor that detects the in-flight temperature (T2) of the indoor unit (40).
  • the in-flight temperature (T2) corresponds to the temperature of the air in the air passage (48) of the casing (41) of the indoor unit (40).
  • the air conditioner (10) may have another sensor for detecting the in-flight temperature (T2) in addition to the second refrigerant temperature sensor (63).
  • the air conditioner (10) has a control device (C).
  • the control device (C) controls the refrigerant circuit (11).
  • the control device (C) controls the indoor unit (40) and the outdoor unit (20).
  • the control device (C) includes an outdoor control unit (C1), an indoor control unit (C2), and a remote controller (C3).
  • the outdoor control unit (C1) is provided in the outdoor unit (20).
  • the indoor control unit (C2) is provided in the indoor unit (40).
  • the remote controller (C3) is installed in the target space.
  • the remote controller (C3) is in a position where the user can operate it.
  • the remote controller (C3) has a display unit (80).
  • the display unit (80) displays a sign for notifying a user, a maintenance company, or the like of predetermined information.
  • the sign here includes characters, codes, symbols, pictures, icons and the like.
  • the display unit (80) is composed of, for example, a liquid crystal monitor.
  • the display unit (80) corresponds to the notification unit.
  • Each of the outdoor control unit (C1), indoor control unit (C2), and remote controller (C3) has a control board.
  • Each of the control boards is provided with a microprocessor and a memory device for storing software for operating the microcomputer.
  • the control device (C) includes a plurality of first communication lines.
  • the outdoor control unit (C1), the indoor control unit (C2), and the remote controller (C3) send and receive signals via these first communication lines.
  • the first communication line is wired.
  • the first communication line may be wireless.
  • the control device (C) includes a compressor (21), an expansion valve (23), a four-way switching valve (25), an outdoor fan (26), and It includes an indoor fan (52), a wind direction adjuster (55), a drain pump (58), and a plurality of second communication lines connecting to each sensor.
  • the control device (C) is at least a compressor (21), an expansion valve (23), a four-way switching valve (25), an outdoor fan (26), an indoor fan (52), a wind direction adjusting unit (55), and a drain pump. (58) has an output unit that outputs a control signal.
  • the control device (C) has an input unit into which the detection value of each sensor is input.
  • the air conditioner (10) performs the air conditioning operation and the first mode.
  • Air conditioning operation air-conditions the target space.
  • the air conditioning operation includes a cooling operation, a dehumidifying operation, and a heating operation.
  • Cooling operation is an operation to cool the air in the target space.
  • the dehumidifying operation is an operation of dehumidifying the air in the target space.
  • the cooling operation and the dehumidifying operation correspond to the cooling operation.
  • the cooling operation is an operation in which the air is cooled by the indoor heat exchanger (53) which has been used as an evaporator by performing the first refrigeration cycle.
  • the heating operation is an operation that heats the air in the target space.
  • the heating operation is an operation in which the air is heated by the indoor heat exchanger (53) which is used as a radiator by performing the second refrigeration cycle.
  • the first mode is an operation for cleaning the indoor heat exchanger (53).
  • the first mode includes a first operation, a second operation, and a third operation.
  • the first mode further includes a drainage operation.
  • the first operation is an operation in which the indoor fan (52) is operated and the first refrigeration cycle is performed to generate dew condensation water in the indoor heat exchanger (53) which is an evaporator.
  • the second operation is an operation in which the indoor fan (52) is operated and the indoor heat exchanger (53) is used as a radiator.
  • the third operation is an operation of operating the indoor fan (52) and stopping the indoor heat exchanger (53).
  • the drainage operation is an operation of draining the water accumulated in the drain pan (54) to the outside of the casing (41).
  • the control device (C) operates the compressor (21), the indoor fan (52), and the outdoor fan (26).
  • the control device (C) sets the four-way switching valve (25) to the first state.
  • the control device (C) appropriately adjusts the opening degree of the expansion valve (23).
  • the first refrigeration cycle is performed in which the refrigerant compressed by the compressor (21) dissipates heat in the outdoor heat exchanger (22) and evaporates in the indoor heat exchanger (53).
  • the refrigerant compressed by the compressor (21) passes through the four-way switching valve (25) and flows through the outdoor heat exchanger (22).
  • the outdoor heat exchanger (22) the refrigerant dissipates heat to the outdoor air and condenses.
  • the refrigerant dissipated by the outdoor heat exchanger (22) is decompressed by the expansion valve (23) and then flows through the indoor heat exchanger (53).
  • the indoor heat exchanger (53) the refrigerant absorbs heat from the indoor air and evaporates.
  • the air cooled by the indoor heat exchanger (53) is supplied to the target space from the air outlet (47).
  • the refrigerant evaporated in the indoor heat exchanger (53) is sucked into the compressor (21) and compressed again.
  • the control device (C) adjusts the target evaporation temperature (TeS) of the indoor heat exchanger (53) so that the indoor temperature (T1) converges to the set temperature.
  • the control device (C) controls the rotation speed of the compressor (21) so that the evaporation temperature (Te) of the refrigerant in the indoor heat exchanger (53) converges to the target evaporation temperature (TeS).
  • the control device (C) operates the compressor (21), the indoor fan (52), and the outdoor fan (26).
  • the control device (C) sets the four-way switching valve (25) to the first state.
  • the control device (C) appropriately adjusts the opening degree of the expansion valve (23).
  • the first refrigeration cycle is performed in which the refrigerant compressed by the compressor (21) dissipates heat in the outdoor heat exchanger (22) and evaporates in the indoor heat exchanger (53).
  • the flow of the refrigerant in the dehumidifying operation is the same as the flow of the refrigerant in the cooling operation.
  • the control device (C) controls the cooling capacity of the indoor heat exchanger (53) so that the evaporation temperature (Te) of the indoor heat exchanger (53) is lower than the dew point temperature (Td) of the indoor air. ..
  • the control device (C) obtains the dew point temperature (Td) based on the room temperature (T1) detected by the inside air temperature sensor (61) and the room humidity (R1) detected by the inside air humidity sensor (62).
  • the control device (C) adjusts the target evaporation temperature (TeS) so that the evaporation temperature (Te) of the indoor heat exchanger (53) is equal to or lower than the dew point temperature (Td).
  • the control device (C) controls the rotation speed of the compressor (21) so that the evaporation temperature (Te) of the refrigerant in the indoor heat exchanger (53) converges to the target evaporation temperature (TeS).
  • the moisture in the indoor air cooled by the indoor heat exchanger (53) condenses. This dehumidifies the room air.
  • the drain pan (54) receives the condensed moisture. The dehumidified air is supplied to the target space from the outlet (47).
  • the control device (C) operates the compressor (21), the indoor fan (52), and the outdoor fan (26).
  • the control device (C) sets the four-way switching valve (25) to the second state.
  • the control device (C) appropriately adjusts the opening degree of the expansion valve (23).
  • a second refrigeration cycle is performed in which the refrigerant compressed by the compressor (21) dissipates heat in the indoor heat exchanger (53) and evaporates in the outdoor heat exchanger (22).
  • the refrigerant compressed by the compressor (21) passes through the four-way switching valve (25) and flows through the indoor heat exchanger (53).
  • the indoor heat exchanger (53) the refrigerant dissipates heat to the indoor air and condenses.
  • the air heated by the indoor heat exchanger (53) is supplied to the target space from the air outlet (47).
  • the refrigerant dissipated by the indoor heat exchanger (53) is decompressed by the expansion valve (23) and then flows through the outdoor heat exchanger (22).
  • the outdoor heat exchanger (22) the refrigerant absorbs heat from the outdoor air and evaporates.
  • the refrigerant evaporated in the outdoor heat exchanger (22) is sucked into the compressor (21) and compressed again.
  • the control device (C) adjusts the target condensation temperature (TcS) of the indoor heat exchanger (53) so that the room temperature (T1) converges to the set temperature.
  • the control device (C) controls the rotation speed of the compressor (21) so that the condensation temperature (Tc) of the refrigerant in the indoor heat exchanger (53) converges to the target condensation temperature (TcS).
  • control device (C) executes the first mode when the air conditioning operation is completed. Strictly speaking, the control device (C) starts the first mode when the cooling operation and the dehumidifying operation are completed. The control device (C) does not start the first mode even when the heating operation is completed.
  • control device (C) executes the first operation, the third operation, the second operation, and the drainage operation in order.
  • the execution time of the first operation is ⁇ T1
  • the execution time of the third operation is ⁇ T2
  • the execution time of the second operation is ⁇ T3
  • the execution time of the drainage operation is ⁇ T4.
  • the execution time ⁇ T2 of the third operation is longer than the execution time ⁇ T3 of the second operation.
  • the execution time ⁇ T2 of the third operation is longer than the execution time ⁇ T1 of the first operation.
  • the execution time ⁇ T2 of the third operation is longer than the execution time ⁇ T4 of the drainage operation.
  • the first operation is an operation of removing dirt such as dust adhering to the surface of the indoor heat exchanger (53).
  • the execution time ⁇ T1 of the first operation is, in principle, 10 minutes.
  • the control device (C) operates the compressor (21), the indoor fan (52), and the outdoor fan (26).
  • the control device (C) sets the four-way switching valve (25) to the first state.
  • the control device (C) appropriately adjusts the opening degree of the expansion valve (23).
  • the refrigerant compressed by the compressor (21) dissipates heat in the outdoor heat exchanger (22), is depressurized by the expansion valve (23), and evaporates in the indoor heat exchanger (53) in the first refrigeration cycle. Will be done.
  • the control device (C) adjusts the target evaporation temperature (TeS) so that the evaporation temperature (Te) of the indoor heat exchanger (53) becomes equal to or lower than the dew point temperature (Td) of the indoor air.
  • the target evaporation temperature (TeS) at the time of the first operation is set to a value lower than the target evaporation temperature (TeS) at the end of the cooling operation.
  • the target evaporation temperature (TeS) at the time of the first operation is set to the same value as the target evaporation temperature (TeS) at the end of the dehumidification operation.
  • the air sucked from the suction port (46) passes through the indoor heat exchanger (53).
  • the refrigerant cools the air to below the dew point temperature.
  • condensed water is generated on the surface of the indoor heat exchanger (53).
  • Condensed water removes dirt such as dust on the surface of the indoor heat exchanger (53).
  • Condensation water used for cleaning the indoor heat exchanger (53) collects in the drain pan (54). The air that has passed through the indoor heat exchanger (53) flows out from the air outlet (47) to the target space.
  • control device (C) controls the air volume of the indoor fan (52) to the breeze volume (LL). As a result, the amount of blown air is reduced, so that it is possible to prevent people in the target space from feeling uncomfortable due to cold air.
  • control device (C) operates the drain pump (58). As a result, the water accumulated in the drain pan (54) can be discharged to the outside of the casing (41).
  • control device (C) adjusts the flap (57) to the horizontal outlet position. As a result, it is possible to prevent the cold air from directly hitting the person in the target space.
  • the evaporation temperature range of the indoor heat exchanger (53) during the first operation is lower than the evaporation temperature range of the evaporation temperature of the indoor heat exchanger (53) during the cooling operation.
  • the control range of the evaporation temperature of the indoor heat exchanger (53) during the first operation is lower than the control range of the evaporation temperature of the indoor heat exchanger (53) during the cooling operation.
  • the control range of the evaporation temperature in the cooling operation is 10 ° C. to 30 ° C.
  • the control range of the evaporation temperature in the first operation is 4 ° C. to 30 ° C.
  • the upper limit value of the evaporation temperature range of the first operation (hereinafter referred to as the first evaporation temperature range) and the upper limit value of the evaporation temperature range of the cooling operation (hereinafter referred to as the second evaporation temperature range).
  • the lower limit of the first evaporation temperature range is lower than the lower limit of the second evaporation temperature range.
  • the first evaporation temperature range and the second evaporation temperature range do not have to overlap at all.
  • the upper limit of the first evaporation temperature range is lower than the lower limit of the second evaporation temperature.
  • the lower limit value of the first evaporation temperature range is lower than the lower limit value of the second evaporation temperature range, and the upper limit value of the first evaporation temperature range. May be lower than the upper limit of the second evaporation temperature range.
  • the third operation is an operation of drying the water on the surface of the indoor heat exchanger (53) with the air conveyed by the indoor fan (52). By drying the water on the surface of the indoor heat exchanger (53), the growth of mold and bacteria on the surface of the indoor heat exchanger (53) can be suppressed.
  • the execution time ⁇ T2 of the third operation is, in principle, 100 minutes.
  • the control device (C) stops the compressor (21) and the outdoor fan (26).
  • the control device (C) operates the indoor fan (52).
  • the control device (C) controls the air volume of the indoor fan (52) to a small air volume (L).
  • the indoor heat exchanger (53) is stopped.
  • the term "indoor heat exchanger stops" as used herein means that the indoor heat exchanger (53) does not function as a radiator and an evaporator.
  • the air sucked from the suction port (46) passes through the indoor heat exchanger (53) in the stopped state.
  • the water on the surface of the indoor heat exchanger (53) evaporates.
  • the air used for drying the indoor heat exchanger (53) flows out from the air outlet (47) to the target space.
  • the execution time ⁇ T2 of the third operation is longer than the execution time ⁇ T3 of the second operation.
  • the indoor heat exchanger (53) does not act as a radiator and is in a stopped state. Therefore, a large amount of water does not evaporate from the surface of the indoor heat exchanger (53). Therefore, by limiting the supply of high-temperature and high-humidity air to the target space for a long period of time, it is possible to prevent people in the target space from feeling uncomfortable.
  • the control device (C) controls the air volume of the indoor fan (52) to a small air volume (L). This makes it possible to accelerate the drying of the indoor heat exchanger (53) as compared with the case where the air volume is a breeze volume (LL). Compared with when the air volume is medium air volume (M) or large air volume (H), it is possible to suppress the person in the target space from feeling uncomfortable.
  • the control device (C) operates the drain pump (58). Strictly speaking, the control device (C) continuously operates the drain pump (58) from the first operation to the third operation. As a result, the water remaining in the drain pan (54) can be discharged to the outside of the casing (41).
  • control device (C) adjusts the flap (57) to the horizontal outlet position. As a result, it is possible to prevent the person in the target space from being directly exposed to moist air.
  • the second operation is an operation of heating the surface of the indoor heat exchanger (53) with a refrigerant and rapidly drying the surface.
  • the execution time ⁇ T3 of the second operation is, in principle, 10 to 15 minutes.
  • the control device (C) operates the compressor (21), the indoor fan (52), and the outdoor fan (26).
  • the control device (C) sets the four-way switching valve (25) to the second state.
  • the control device (C) appropriately adjusts the opening degree of the expansion valve (23).
  • the refrigerant compressed by the compressor (21) dissipates heat in the indoor heat exchanger (53), is depressurized by the expansion valve (23), and evaporates in the outdoor heat exchanger (22) in the second refrigeration cycle. Will be done.
  • control device (C) adjusts the target condensation temperature (TcS) to a predetermined value.
  • the air sucked from the suction port (46) passes through the indoor heat exchanger (53).
  • the surface of the indoor heat exchanger (53) is heated by the internal refrigerant.
  • the water on the surface of the indoor heat exchanger (53) further evaporates.
  • the air containing the evaporated water flows out from the air outlet (47) to the target space.
  • the execution time ⁇ T3 of the second operation is shorter than the execution time ⁇ T2 of the third operation. Therefore, by limiting the supply of high-temperature and high-humidity air to the target space, it is possible to prevent people in the target space from feeling uncomfortable.
  • the heat of the refrigerant is used to dry the indoor heat exchanger (53). Therefore, even if the execution time ⁇ T3 is relatively short, the moisture in the indoor heat exchanger (53) can be reliably removed. As a result, the subsequent growth of mold and fungi can be suppressed.
  • control device (C) controls the air volume of the indoor fan (52) to a small air volume (L).
  • the air volume of the blown air becomes relatively small, so that it is possible to prevent people in the target space from feeling uncomfortable due to the high humidity and high temperature wind.
  • the control device (C) operates the drain pump (58). Strictly speaking, the control device (C) continuously operates the drain pump (58) from the third operation to the second operation. As a result, the water remaining in the drain pan (54) can be discharged to the outside of the casing (41).
  • control device (C) adjusts the flap (57) to the horizontal outlet position. As a result, it is possible to prevent the person in the target space from being directly exposed to high temperature and high humidity air.
  • ⁇ Drainage operation> In the drainage operation, the control device (C) stops the compressor (21), the indoor fan (52), and the outdoor fan (26). In the drainage operation, the indoor unit (40) is substantially stopped.
  • control device (C) operates the drain pump (58). Strictly speaking, the control device (C) continuously operates the drain pump (58) from the second operation to the drainage operation. As a result, the water remaining in the drain pan (54) can be discharged to the outside of the casing (41).
  • the first mode ends.
  • the control device (C) controls the flap (57) to the closed state.
  • step ST1 when the air conditioning operation is completed in step ST1, the control device (C) determines which operation is completed. In step ST2, the control device (C) determines whether or not the heating operation has been completed. If the control device (C) determines in step ST2 that the heating operation has been completed, the control device (C) does not execute the first mode in step ST8. In other words, after the end of the heating operation, the control device (C) prohibits the execution of the first mode. Therefore, the first operation is not executed.
  • step ST3 the control device (C) determines whether or not the cooling operation has been completed. If the control device (C) determines in step ST3 that the cooling operation has been completed, step ST5 is performed. If the control device (C) determines in step ST3 that the cooling operation has not been completed, step ST4 is performed.
  • step ST4 the control device (C) determines whether or not the dehumidifying operation has been completed.
  • step ST5 is performed. If the control device (C) determines in step ST4 that the dehumidifying operation has not been completed, step ST8 is performed.
  • step ST5 the controller (C) confirms the settings of the remote controller (C3). The user or the like can select whether or not to execute the first mode on the remote controller (C3). If the remote controller (C3) is not selected to execute the first mode in step ST5, the controller (C) does not execute the first mode in step ST8. If the remote controller (C3) is selected to execute the first mode in step ST5, step ST6 is performed.
  • step ST6 the control device (C) determines whether the execution time of the immediately preceding cooling operation is longer than the predetermined time.
  • the predetermined time used in step ST6 is 1 minute.
  • the cooling operation referred to here is a cooling operation or a dehumidifying operation executed immediately before. If the execution time of the cooling operation is too short, it is possible that the user or the like mistakenly started the cooling operation or the dehumidifying operation and then ended it immediately. Therefore, if the condition of step ST6 is not satisfied, the control device (C) does not execute the first mode in step ST8. When the condition of step ST6 is satisfied, step ST7 is performed.
  • step ST7 the control device (C) determines whether the dew point temperature (Td) is smaller than the lower limit of the target evaporation temperature (TeS) of the indoor heat exchanger (53).
  • the lower limit of the target evaporation temperature (TeS) referred to here is the lower limit of the control range of the target evaporation temperature (TeS) in the first operation.
  • the control device (C) does not execute the first operation of step ST10, but executes the third operation of step ST20 (see FIG. 11).
  • step ST7 the control device (C) may determine whether the condition that the dew point temperature (Td) is lower than the predetermined target evaporation temperature (TeS) is satisfied. In step ST7, the controller (C) may determine whether the condition that the dew point temperature (Td) is lower than the evaporation temperature (Te) of the indoor heat exchanger (53) at the end of the cooling operation is satisfied.
  • step ST7 If the condition of step ST7 is not satisfied, the control device (C) executes the first mode in step ST9. The control device (C) executes the first operation of step ST10 (see FIG. 10).
  • the dew point temperature (Td) of the control device (C) is the target evaporation temperature (TeS) of the indoor heat exchanger (53). Judge whether it is smaller than the lower limit of.
  • the lower limit of the target evaporation temperature (TeS) referred to here is the lower limit of the control range of the target evaporation temperature (TeS) in the first operation.
  • step ST11 the control device (C) may determine whether the condition that the dew point temperature (Td) is lower than the predetermined target evaporation temperature (TeS) is satisfied.
  • step ST7 the controller (C) may determine whether the condition that the dew point temperature (Td) is lower than the evaporation temperature (Te) of the indoor heat exchanger (53) is satisfied.
  • step ST12 the control device (C) determines whether the room temperature (T1) is equal to or lower than the predetermined lower limit temperature.
  • the lower limit temperature is a value obtained by subtracting a predetermined temperature (for example, 3 ° C.) from the room temperature (T1) at the end of the cooling operation.
  • the control device (C) does not continuously execute the first operation, but executes the third operation of step ST20. As a result, it is possible to prevent a person in the target space from feeling excessively cold due to the first driving.
  • step ST13 the control device (C) determines whether the execution time of the first operation is ⁇ T1 or more. This ⁇ T1 is 10 minutes. When the condition of step ST13 is satisfied, the control device (C) ends the first operation and executes the third operation of step ST20. If the condition of step ST13 is not satisfied, step ST14 is performed.
  • the control device (C) ends the first operation and executes the drainage operation in step ST40 (see FIG. 13).
  • the abnormality of the air conditioner (10) is the abnormality of each device of the indoor unit (40), the abnormality of each device of the outdoor unit (20), the abnormality of each device of the refrigerant circuit (11), and the abnormality of each sensor. Includes abnormalities and abnormalities of each communication line. If the condition of step ST14 is not satisfied, the process returns to step ST11.
  • step ST21 the control device (C) determines whether the execution time of the third operation is ⁇ T2 or more. ⁇ T2 is 100 minutes. When the condition of step ST21 is satisfied, the control device (C) ends the third operation and shifts to the second operation of step ST30. If the condition of step ST21 is not satisfied, step ST22 is performed.
  • step ST22 When an abnormality occurs in the air conditioner (10) in step ST22, the control device (C) ends the third operation and executes the drainage operation in step ST40. If the condition of step ST22 is not satisfied, the process returns to step ST21.
  • the control device (C) determines whether the outdoor temperature (T2) is higher than the first temperature.
  • the first temperature is a temperature lower than the third temperature that controls the heating operation during the air conditioning operation.
  • the third temperature is set, for example, between 20 ° C and 35 ° C.
  • the first temperature is a value obtained by subtracting a predetermined temperature (for example, 2 ° C.) from the third temperature.
  • step ST32 is performed. If the condition of step ST30 is not satisfied, step ST31 is performed.
  • step ST31 the control device (C) determines whether the room temperature (T1) is higher than the second temperature.
  • the second temperature is a value obtained by subtracting a predetermined temperature (for example, 2 ° C.) from the fourth temperature.
  • the first temperature and the second temperature may be the same temperature or different temperatures.
  • step ST32 is performed. If the condition of step ST31 is not satisfied, step ST33 is performed.
  • step ST32 the control device (C) changes the execution time ⁇ T3 of the second operation in order to perform the limiting process that limits the operation of the second operation. Specifically, the control device (C) changes the value of ⁇ T3 so that the execution time ⁇ T3 of the second operation is shortened.
  • the execution time ⁇ T3 of the second operation becomes shorter than the execution time of the second operation when the limiting processing is not performed.
  • the execution time of the normal second operation is 10 minutes
  • the execution time of the second operation during the restriction processing may be 5 minutes.
  • the outdoor temperature and the indoor temperature are higher than the predetermined temperature, and it is determined whether or not the limiting process is performed.
  • it is not limited to this form. For example, after the end of the air conditioning operation and before the start of the first mode, it may be decided whether or not to perform the restriction process.
  • step ST34 the control device (C) continues to be in a state where the condensation temperature (Tc) of the indoor heat exchanger (53) is equal to or higher than a predetermined value for a predetermined time or longer. To judge.
  • the control device (C) may determine that the state in which the temperature of the discharged refrigerant of the compressor (21) is equal to or higher than a predetermined value continues for a predetermined time or longer.
  • the control device (C) ends the second operation and executes the drainage operation of step ST40. If the condition of step ST34 is not satisfied, step ST35 is performed.
  • step ST35 the control device (C) determines whether the room temperature (T1) is higher than the predetermined upper limit temperature.
  • the upper limit temperature is a value obtained by adding a predetermined temperature (for example, 3 ° C.) to the room temperature (T1) at the start of the second operation. If the room temperature (T1) is higher than the upper limit temperature in step ST35, it can be determined that the air in the target space is excessively heated by the second operation. Therefore, when the condition of step ST35 is satisfied, the control device (C) does not continuously execute the second operation, but executes the drainage operation of step ST40. As a result, it is possible to prevent a person in the target space from feeling excessive heat due to the second driving. If the condition of step ST35 is not satisfied, step ST36 is performed.
  • step ST36 the control device (C) determines whether the discomfort index of the air in the target space is larger than the predetermined value.
  • the discomfort index is obtained by the calculation unit of the control device (C) based on the humidity and temperature of the indoor air. Specifically, the calculation unit of the control device (C) calculates the discomfort index based on the room temperature (T1) detected by the inside air temperature sensor (61) and the room humidity (R1) detected by the inside air humidity sensor (62). Ask.
  • step ST36 if the discomfort index is higher than the predetermined value, it can be determined that the comfort of the person in the target space is impaired. Therefore, when the condition of step ST36 is satisfied, the control device (C) does not continuously execute the second operation, but executes the drainage operation of step ST40.
  • step ST36 the control device (C) can also use an index other than the discomfort index.
  • This index is preferably an index using the temperature and humidity of the indoor air.
  • a heat index can also be used as this index.
  • the heat index is WBGT (Wet-Bulb Globe Temperature).
  • step ST37 the control device (C) determines whether the execution time of the second operation is ⁇ T3 or more. ⁇ T3 is 10 to 15 minutes. When the condition of step ST37 is satisfied, the control device (C) ends the second operation and executes the drainage operation of step ST40. If the condition of step ST37 is not satisfied, step ST38 is performed.
  • step ST38 When an abnormality occurs in the air conditioner (10) in step ST38, the control device (C) ends the second operation and executes the drainage operation in step ST40. If the condition of step ST38 is not satisfied, the process returns to step ST34.
  • the drainage operation is executed in any of the cases where an abnormality occurs in the first operation, an abnormality occurs in the third operation, and an abnormality occurs in the second operation.
  • the drain pump (58) stops.
  • the drain pump (58) is operated to ensure that the water in the drain pan (54) is discharged.
  • the drain pump (58) is operated, the water in the drain pan (54) is sent to the outside of the casing (41) via the drainage channel (70) shown in FIG.
  • the drain pump (58) is stopped due to an abnormality in the air conditioner (10)
  • the second rising portion (70d), the second relay section (70c), the first relay section (70b), and the first relay section (70b) are stopped. 1
  • the water in the rising part (70a) flows back into the drain pan (54). This is because, as described above, in the drainage channel (70), a certain amount of lift is secured in order to drain water from the inclined portion (70e) by its own weight.
  • control device (C) executes the drainage operation and the drain pump (58) is continuously operated in all of the first operation, the third operation, and the second operation. Therefore, it is possible to prevent the water in the drainage channel (70) from flowing back to the drain pan (54).
  • the water in the drainage channel (70) flows back into the drain pan (54) after an abnormality occurs in the second operation, the water in the drain pan (54) evaporates due to the heat of the indoor heat exchanger (53). In this case, moisture adheres to the surface of the indoor heat exchanger (53), and the indoor heat exchanger (53) cannot be sufficiently dried. In addition, the supply of hot and humid air to the target space makes people in the target space feel uncomfortable.
  • the drain pump (58) is continuously operated by the drainage operation. Therefore, the backflow of water in the drainage channel (70) can be suppressed, and the evaporation of water in the drain pan (54) can be suppressed.
  • step ST41 the control device (C) determines whether the in-flight temperature (T2) is lower than the predetermined lower limit temperature.
  • the lower limit temperature is a value obtained by adding a predetermined temperature (for example, 2 ° C.) to the room temperature (T1).
  • a predetermined temperature for example, 2 ° C.
  • the control device (C) sets the condition of step ST41 as a necessary condition for terminating the drainage operation. In other words, the control device (C) ends the second operation when the temperature of the air in the air passage (48) becomes equal to or lower than the predetermined temperature.
  • step ST42 the control device (C) determines whether the humidity inside the machine is equal to or less than the predetermined lower limit humidity.
  • the in-flight humidity is the relative humidity inside the casing (41).
  • the relative humidity is obtained by the calculation unit of the control device (C) based on the room temperature (T1) and the room humidity (R1).
  • the lower limit humidity is, for example, 65%.
  • control device (C) ends the drainage operation in step ST43.
  • the control device (C) may end the drainage operation in step ST43 when any one of the conditions of step ST41 and step ST42 is satisfied.
  • step ST43 the controller (C) determines whether the execution time of the drainage operation is ⁇ T4 or more. ⁇ T4 is a predetermined time shorter than ⁇ T2. When the condition of step ST43 is satisfied, the control device (C) ends the drainage operation in step ST43. As a result, the first mode ends (step ST44).
  • the display unit (80) of the remote controller (C3) displays a sign.
  • This sign is a sign that the drainage operation is in progress.
  • the indoor fan (52) or the like stops with the end of the second operation, the user or the like determines that the first mode has ended.
  • the drain pump (58) is in the operating state in the drainage operation, the user or the like who hears the operating noise of the drain pump (58) cannot understand what kind of operating condition is currently in operation.
  • the sign on the display (80) disappears when the drainage operation is completed.
  • the display unit (80) may display a sign informing that the first mode is being executed during the drainage operation.
  • the display unit (80) corresponds to the notification unit.
  • the display unit (80) may display a sign notifying that the restriction process is being performed, such as that the second operation is not being performed.
  • the display unit (80) may indicate that the first mode is being executed by a light such as an LED.
  • the display unit (80) may be provided in a device other than the remote controller (C3) such as the indoor unit (40).
  • a feature of the embodiment is a refrigerant circuit in which a refrigeration cycle is performed, including a compressor (21), an outdoor heat exchanger (22) (heat source heat exchanger), and an indoor heat exchanger (53) (utilized heat exchanger).
  • An indoor unit (40) (utilization unit) equipped with an indoor heat exchanger (53) and an indoor fan (52) (blower) that supplies air passing through the indoor heat exchanger (53) to the target space. )
  • the first operation in which the indoor heat exchanger (53) is used as an evaporator to generate condensed water or ice, and the second operation in which the indoor heat exchanger (53) is used as a radiator to heat the air after the first operation is completed.
  • a control device (C) for controlling the refrigerant circuit (11) and the indoor fan (52) is provided, and the control device (C) is provided when the outdoor temperature is higher than the first temperature or indoors.
  • the control device (C) is provided when the outdoor temperature is higher than the first temperature or indoors.
  • the control device (C) controls the refrigerant circuit (11) and the indoor fan (52) to perform the first operation and the second operation.
  • the indoor heat exchanger (53) is used as an evaporator to generate condensed water or ice.
  • the indoor heat exchanger (53) is used as a radiator to heat the air. Then, when the outdoor temperature is higher than the first temperature, or when the indoor temperature is higher than the second temperature, the limiting process for limiting the second operation is performed.
  • the indoor temperature also rises according to the outdoor temperature. Then, when high-temperature air is supplied to the target space where the indoor temperature is high, the person in the target space feels uncomfortable.
  • control device (C) executes the first operation and the second operation in order after the air conditioning operation for air-conditioning the target space by the indoor heat exchanger (53) is completed.
  • the first operation and the second operation are continuously executed in order. Therefore, after automatically cleaning the dust adhering to the indoor heat exchanger (53) in the air conditioning operation, the condensed water generated on the surface of the indoor heat exchanger (53) can be automatically dried.
  • control device (C) is indoors in a state where the first operation and the indoor heat exchanger (53) are stopped after the air conditioning operation for air-conditioning the target space by the indoor heat exchanger (53) is completed.
  • the third operation in which the fan (52) is operated and the second operation are executed in order.
  • the first operation, the third operation in which the indoor fan (52) is operated with the indoor heat exchanger (53) stopped, And the second operation are executed in order. Therefore, after automatically cleaning the dust adhering to the indoor heat exchanger (53) in the air conditioning operation, the condensed water generated on the surface of the indoor heat exchanger (53) can be automatically dried.
  • control device (C) performs the limiting process when the outdoor temperature is higher than the first temperature and the indoor temperature is higher than the second temperature.
  • the restriction treatment is performed when the outdoor temperature is higher than the first temperature and the indoor temperature is higher than the second temperature.
  • the feature of the embodiment is that in the limiting process, the execution time of the second operation is shorter than the execution time of the second operation when the limiting process is not performed.
  • the execution time of the second operation is made shorter than the execution time of the second operation when the restriction processing is not performed. As a result, it is possible to shorten the time during which high-temperature air is supplied to the target space having a high indoor temperature, and to prevent people in the target space from feeling uncomfortable.
  • the feature of the embodiment is that the display unit (80) (notification unit) for notifying that the restriction processing is in progress is further provided.
  • the display unit (80) notifies that the restriction process is in progress. As a result, the user can grasp that the utilization unit (40) is in the process of restriction processing.
  • control device (C) executes an air-conditioning operation for air-conditioning the target space by the indoor heat exchanger (53), and the air-conditioning operation is the air heated by using the indoor heat exchanger (53) as a radiator.
  • the control device (C) limits the heating operation when the outdoor temperature is higher than the third temperature, and the first temperature is lower than the third temperature. ..
  • the air conditioning operation includes a heating operation in which the air heated by the indoor heat exchanger (53) as a radiator is supplied to the target space.
  • the control device (C) limits the heating operation when the outdoor temperature is higher than the third temperature.
  • the first temperature which is a temperature condition that limits the second operation, is lower than the third temperature.
  • control device (C) executes an air-conditioning operation for air-conditioning the target space by the indoor heat exchanger (53), and the air-conditioning operation is the air heated by using the indoor heat exchanger (53) as a radiator.
  • the control device (C) limits the heating operation when the room temperature is higher than the fourth temperature, and the second temperature is lower than the fourth temperature. ..
  • the air conditioning operation includes a heating operation in which the air heated by the indoor heat exchanger (53) as a radiator is supplied to the target space.
  • the control device (C) limits the heating operation when the room temperature is higher than the fourth temperature.
  • the second temperature which is a temperature condition that limits the second operation, is lower than the fourth temperature.
  • Embodiment 2 >> Hereinafter, the same parts as those in the first embodiment are designated by the same reference numerals, and only the differences will be described.
  • step ST11 the dew point temperature (Td) of the control device (C) is the target evaporation temperature (TeS) of the indoor heat exchanger (53). Judge whether it is smaller than the lower limit of.
  • step ST15 is performed. If the condition of step ST11 is not satisfied, step ST12 is performed.
  • step ST12 the control device (C) determines whether the room temperature (T1) is equal to or lower than the predetermined lower limit temperature. When the condition of step ST12 is satisfied, step ST15 is performed. If the condition of step ST12 is not satisfied, step ST13 is performed.
  • step ST13 the control device (C) determines whether the execution time of the first operation is ⁇ T1 or more. When the condition of step ST13 is satisfied, step ST15 is performed. If the condition of step ST13 is not satisfied, step ST14 is performed.
  • step ST14 When an abnormality occurs in the air conditioner (10) in step ST14, the control device (C) ends the first operation and executes the drainage operation in step ST40. If the condition of step ST14 is not satisfied, the process returns to step ST11.
  • step S15 the control device (C) determines whether the outdoor temperature (T2) is higher than the first temperature.
  • the first temperature is a temperature lower than the third temperature that controls the heating operation during the air conditioning operation.
  • the third temperature is set, for example, between 20 ° C and 35 ° C.
  • the first temperature is a value obtained by subtracting a predetermined temperature (for example, 2 ° C.) from the third temperature.
  • step ST15 When the condition of step ST15 is satisfied, the third operation at the time of the restriction processing of step ST50 is executed. If the condition of step ST15 is not satisfied, step ST16 is performed.
  • step ST16 the control device (C) determines whether the room temperature (T1) is higher than the second temperature.
  • the second temperature is a value obtained by subtracting a predetermined temperature (for example, 2 ° C.) from the fourth temperature.
  • the first temperature and the second temperature may be the same temperature or different temperatures.
  • step ST16 When the condition of step ST16 is satisfied, the third operation at the time of the restriction processing of step ST50 is executed. If the condition of step ST16 is not satisfied, the normal third operation of step ST20 is executed.
  • the outdoor temperature and the indoor temperature are higher than the predetermined temperature, and it is determined whether or not the limiting process is performed.
  • it is not limited to this form. For example, after the end of the air conditioning operation and before the start of the first mode, it may be decided whether or not to perform the restriction process.
  • control device (C) performs the first blower operation and the second blower operation in which the air volume is smaller than that of the first blower operation.
  • step ST50 when the third operation is started in step ST50, the first blower operation is started in step ST51.
  • the control device (C) controls the air volume of the indoor fan (52) to a small air volume (L). Then, in step ST52, the control device (C) determines whether the execution time of the first blower operation is ⁇ T5 or more. ⁇ T5 is 100 minutes.
  • step ST54 is performed. If the condition of step ST52 is not satisfied, step ST53 is performed.
  • step ST53 When an abnormality occurs in the air conditioner (10) in step ST53, the control device (C) ends the first blower operation in the third operation and executes the drainage operation in step ST40. If the condition of step ST53 is not satisfied, the process returns to step ST52.
  • step ST54 the second ventilation operation is started.
  • the control device (C) controls the air volume of the indoor fan (52) to the light air volume (LL).
  • step ST55 the control device (C) determines whether the execution time of the second blower operation is ⁇ T6 or more. ⁇ T6 is 4 hours.
  • step ST55 When the condition of step ST55 is satisfied, the control device (C) ends the second blower operation in the third operation, and executes the drainage operation of step ST40 without performing the second operation. If the condition of step ST55 is not satisfied, step ST56 is performed.
  • step ST56 When an abnormality occurs in the air conditioner (10) in step ST56, the control device (C) ends the second blower operation in the third operation and executes the drainage operation in step ST40. If the condition of step ST56 is not satisfied, the process returns to step ST55.
  • Embodiment 2- The feature of the embodiment is that the second operation is not performed in the restriction process.
  • the second operation is not performed in the restriction process.
  • high-temperature air is not supplied to the target space having a high indoor temperature, and it is possible to prevent people in the target space from feeling uncomfortable or being in poor physical condition.
  • the feature of the embodiment is that, in the restriction process, the third operation of operating the indoor fan (52) with the indoor heat exchanger (53) stopped is performed without performing the second operation.
  • the third operation of operating the indoor fan (52) with the indoor heat exchanger (53) stopped is performed without performing the second operation. ..
  • the indoor heat exchanger (53) can be dried without supplying high-temperature air to the target space having a high indoor temperature.
  • the feature of the embodiment is that in the third operation, the first blower operation and the second blower operation in which the air volume is smaller than that of the first blower operation are performed.
  • the first blower operation and the second blower operation are performed.
  • the blast is performed with a smaller air volume than in the first blast operation.
  • the indoor heat exchanger (53) becomes dry, bacteria and mold grow, and odor is generated. To do.
  • the target space of the air conditioner (10) is not limited to the indoor space.
  • the target space may be an internal space such as a warehouse, or may be a space inside a factory.
  • the air conditioner (10) may be of a multi-type having a plurality of indoor units (40).
  • the multi-type air conditioner (10) may be of a method in which some indoor units (40) are heated and at the same time other indoor units (40) are cooled.
  • the air conditioner (10) may be an air conditioning system having a plurality of systems of refrigerant circuits.
  • the air conditioner (10) may be of a type in which the refrigerant circuit (11) is integrally housed in the casing (41) of the indoor unit (40).
  • An example of the air conditioner in this example is a window type air conditioner.
  • the indoor unit (40) may be arranged on the front side of the ceiling surface and may be suspended from the top surface.
  • the indoor unit (40) may be arranged on the back side of the top surface and suspended from a beam on the ceiling.
  • the indoor unit (40) may have one or both of the suction duct and the outlet duct.
  • the suction duct constitutes a flow path for sucking indoor air into the air passage.
  • the outlet duct constitutes a flow path for supplying air that has passed through the indoor heat exchanger (53) into the room.
  • the indoor unit (40) may be a wall-mounted type or a floor-standing type.
  • the control device (C) may be provided only in the indoor unit (40) or may be provided only in the outdoor unit (20).
  • the control device (C) may be a centralized management device separate from the indoor unit (40) and the outdoor unit (20).
  • the first operation may be an operation of generating ice in the indoor heat exchanger (53) as an evaporator.
  • ice is generated on the surface of the indoor heat exchanger (53).
  • third and second operations remove this ice from the surface of the indoor heat exchanger (53). As a result, the indoor heat exchanger (53) can be cleaned.
  • the first operation may be an operation in which condensed water is generated on the surface of the indoor heat exchanger (53), and includes a cooling operation and a dehumidifying operation.
  • the control device (C) may perform a cooling operation or a dehumidifying operation as the first operation, and then execute the third operation and the second operation in order.
  • the present disclosure is useful for air conditioners.
  • Air conditioner 11 Refrigerant circuit 21 Compressor 22 Outdoor heat exchanger (heat source heat exchanger) 40 Indoor unit (use unit) 52 Indoor fan (blower) 53 Indoor heat exchanger (utilized heat exchanger) 80 Display (notification) C controller

Abstract

L'invention concerne un dispositif de commande (C) commandant un circuit de fluide frigorigène (11) et une soufflante (52) effectuant une première opération et une seconde opération. La première opération génère une condensation ou de la glace, à l'aide d'un échangeur de chaleur d'usage (53) en tant qu'évaporateur. La seconde opération chauffe l'air après que la première opération a été achevée, en utilisant l'échangeur de chaleur d'usage (53) en tant que dissipateur. Si la température extérieure est supérieure à une première température ou si la température intérieure est supérieure à une seconde température, le dispositif de commande (C) limite la seconde opération.
PCT/JP2020/038651 2019-11-15 2020-10-13 Climatiseur WO2021095422A1 (fr)

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CN113819630B (zh) * 2021-09-13 2023-06-23 青岛海尔空调器有限总公司 用于控制空调的方法、装置及空调
WO2023210734A1 (fr) * 2022-04-28 2023-11-02 パナソニックＩｐマネジメント株式会社 Dispositif à cycle de réfrigération

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JP2018189356A (ja) * 2017-04-28 2018-11-29 日立ジョンソンコントロールズ空調株式会社 空気調和機
CN110173846A (zh) * 2019-05-29 2019-08-27 广东美的制冷设备有限公司 空调器、室内换热器的自清洁方法和计算机可读存储介质

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