WO2022190885A1 - 空気調和機 - Google Patents

空気調和機 Download PDF

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Publication number
WO2022190885A1
WO2022190885A1 PCT/JP2022/007663 JP2022007663W WO2022190885A1 WO 2022190885 A1 WO2022190885 A1 WO 2022190885A1 JP 2022007663 W JP2022007663 W JP 2022007663W WO 2022190885 A1 WO2022190885 A1 WO 2022190885A1
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WO
WIPO (PCT)
Prior art keywords
indoor unit
indoor
heat exchanger
request
unit
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Application number
PCT/JP2022/007663
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English (en)
French (fr)
Japanese (ja)
Inventor
元輝 高木
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.)
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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 CN202280020872.7A priority Critical patent/CN116981893A/zh
Publication of WO2022190885A1 publication Critical patent/WO2022190885A1/ja

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values

Definitions

  • the present disclosure relates to air conditioners.
  • Air conditioners are known in which moisture in the air is condensed or frosted on the surface of an indoor heat exchanger, and the moisture is used to clean the indoor heat exchanger. Further, in Patent Document 1, in a multi-type air conditioner having one outdoor unit and a plurality of indoor units, when a predetermined condition is established, a time period in which cleaning processing is performed in a plurality of indoor heat exchangers It is disclosed to overlap at least a portion of the.
  • Patent Document 1 when a plurality of indoor heat exchangers are in the process of cleaning (cleaning operation), if one of the indoor units receives an air conditioning operation command, the plurality of indoor heat exchangers It is disclosed that the cleaning operation is stopped and the air conditioning operation of the indoor unit that has received the instruction is performed.
  • Patent Literature 1 does not disclose any control when there is a request to simultaneously perform a cleaning operation in a certain indoor unit and a heating operation in another indoor unit. In such a case, since the cleaning operation in which the indoor heat exchanger functions as an evaporator and the heating operation in which the indoor heat exchanger functions as a condenser cannot be performed at the same time, when the heating operation is performed, the user's request for the cleaning operation cannot be satisfied.
  • An object of the present disclosure is to provide an air conditioner that can meet a user's request for a cleaning operation when there is a request for a cleaning operation in a certain indoor unit and a request for a heating operation in another indoor unit at the same time. It is to be.
  • An air conditioner indoor unit is connected to an outdoor unit including an outdoor heat exchanger, the first indoor unit including a first indoor heat exchanger, and the outdoor unit connected to the outdoor unit via a refrigerant pipe. through the refrigerant pipe, a second indoor unit including a second indoor heat exchanger, and a control unit.
  • the control unit performs a cleaning operation in the first indoor unit and the second indoor heat, including cleaning the first indoor heat exchanger by causing the first indoor heat exchanger to function as an evaporator.
  • a heating operation can be performed in the second indoor unit by causing the exchanger to function as a condenser, and the request for the cleaning operation in the first indoor unit and the request for the heating operation in the second indoor unit at the same time, the cleaning operation is performed in the first indoor unit without performing the heating operation in the second indoor unit.
  • the cleaning operation in the first indoor unit is requested first. and when the first indoor unit is in a preparatory state before the start of the cleaning operation at the time when the heating operation is requested in the second indoor unit, the heating operation in the second indoor unit is requested first and the first
  • the cleaning operation in the first indoor unit and heating in the second indoor unit It includes all cases where driving is requested at the same time.
  • control unit is capable of executing cooling operation in the first indoor unit, causing the first indoor heat exchanger to function as an evaporator, and When there is a request for the cooling operation and a request for the heating operation in the second indoor unit at the same time, the heating operation is performed in the second indoor unit without executing the cooling operation in the first indoor unit.
  • the control unit performs, as the air conditioning operation in the first indoor unit, a heating operation in which the first indoor heat exchanger functions as a condenser, and an evaporating operation in which the first indoor heat exchanger is operated.
  • the second indoor heat exchange can be performed as the air conditioning operation in the second indoor unit.
  • the second indoor unit is capable of executing a cooling operation in which the second indoor heat exchanger functions as an evaporator, and includes washing the second indoor heat exchanger by causing the second indoor heat exchanger to function as an evaporator.
  • the control unit determines the request for the air-conditioning operation or the cleaning operation in the first indoor unit and the request for the cleaning operation.
  • the request for the air conditioning operation or the cleaning operation for the second indoor unit is made at the same time, the operation request for the first indoor unit and the operation request for the second indoor unit are made first. It may be possible to operate in a first mode in which the operation according to the operation request is preferentially executed, and in a second mode in which the operation according to the operation request performed later is preferentially executed.
  • the control unit when the control unit is operating in the first mode, when the cleaning operation in the first indoor unit is requested during the heating operation in the second indoor unit, the first The heating operation in the second indoor unit may be interrupted and the cleaning operation in the first indoor unit may be performed.
  • the control unit when the control unit is operating in the first mode, when the heating operation in the second indoor unit is requested during the cleaning operation in the first indoor unit, the second The cleaning operation in the first indoor unit may be continued without executing the heating operation in the indoor unit.
  • the control unit when the heating operation in the second indoor unit is requested during the cleaning operation in the first indoor unit, the second The cleaning operation in the first indoor unit may be continued without executing the heating operation in the second indoor unit.
  • control unit when the control unit is operating in the second mode, when the cleaning operation in the first indoor unit is requested during the heating operation in the second indoor unit, the second The heating operation in the second indoor unit may be interrupted and the cleaning operation in the first indoor unit may be performed.
  • the control unit performs, as the air conditioning operation in the first indoor unit, a heating operation in which the first indoor heat exchanger functions as a condenser, and an evaporating operation in which the first indoor heat exchanger is operated.
  • the second indoor heat exchange can be performed as the air conditioning operation in the second indoor unit.
  • the second indoor unit is capable of executing a cooling operation in which the second indoor heat exchanger functions as an evaporator, and includes washing the second indoor heat exchanger by causing the second indoor heat exchanger to function as an evaporator.
  • the control unit determines the request for the air-conditioning operation or the cleaning operation in the first indoor unit and the request for the cleaning operation.
  • a third mode in which, when a request for the air conditioning operation or the cleaning operation in the second indoor unit is received at the same time, the operation according to the operation request in the first indoor unit is preferentially executed; It may be possible to operate in a fourth mode in which the indoor unit preferentially executes the operation according to the operation request.
  • the control unit when operating in the fourth mode, when the heating operation in the second indoor unit is requested during the cleaning operation in the first indoor unit, the control unit The cleaning operation in the first indoor unit is continued without executing the heating operation in the second indoor unit, and the cleaning operation in the first indoor unit is performed during the heating operation in the second indoor unit.
  • the heating operation in the second indoor unit may be interrupted and the cleaning operation in the first indoor unit may be performed.
  • control unit when the control unit is operating in the third mode, when the heating operation in the second indoor unit is requested during the cleaning operation in the first indoor unit, the first It is requested that the cleaning operation in the indoor unit is continued and the heating operation is not performed in the second indoor unit, and that the cleaning operation in the first indoor unit is in progress during the heating operation in the second indoor unit.
  • the cleaning operation in the first indoor unit may be performed and the heating operation in the second indoor unit may be interrupted.
  • the control unit performs, as the air conditioning operation in the first indoor unit, a heating operation in which the first indoor heat exchanger functions as a condenser, and an evaporating operation in which the first indoor heat exchanger is operated.
  • the second indoor heat exchange can be performed as the air conditioning operation in the second indoor unit.
  • the second indoor unit is capable of executing a cooling operation in which the second indoor heat exchanger functions as an evaporator, and includes washing the second indoor heat exchanger by causing the second indoor heat exchanger to function as an evaporator.
  • the control unit determines the request for the air-conditioning operation or the cleaning operation in the first indoor unit and the request for the cleaning operation.
  • the operation request for the first indoor unit and the operation request for the second indoor unit are made first. a first mode for preferentially executing the operation according to the operation request, a second mode for preferentially executing the operation according to the later operation request, and the operation according to the operation request in the first indoor unit. and the operation according to the operation request in the second indoor unit may be preferentially executed.
  • the heating operation in the second indoor unit is requested during the cleaning operation in the first indoor unit.
  • the heating operation in the second indoor unit is not performed, and the heating operation in the first indoor unit is performed during the heating operation in the second indoor unit.
  • the cleaning operation in the first indoor unit may be performed and the heating operation in the second indoor unit may be interrupted.
  • the heating operation in the second indoor unit is requested during the cleaning operation in the first indoor unit.
  • the cleaning operation in the first indoor unit is continued and the heating operation in the second indoor unit is not performed, and the heating operation in the first indoor unit is performed during the heating operation in the second indoor unit
  • the cleaning operation in the first indoor unit may be performed and the heating operation in the second indoor unit may be interrupted.
  • the heating operation in the second indoor unit is requested during the cleaning operation in the first indoor unit.
  • the cleaning operation in the first indoor unit is continued and the heating operation in the second indoor unit is not performed, and the heating operation in the first indoor unit is performed during the heating operation in the second indoor unit
  • the cleaning operation in the first indoor unit may be performed and the heating operation in the second indoor unit may be interrupted.
  • the heating operation in the second indoor unit is requested during the cleaning operation in the first indoor unit.
  • the washing operation in the first indoor unit is continued and the heating operation in the second indoor unit is not performed, and the washing in the first indoor unit is performed during the heating operation in the second indoor unit.
  • the cleaning operation in the first indoor unit may be performed and the heating operation in the second indoor unit may be interrupted.
  • FIG. 1 is a configuration diagram of a multi-type air conditioner according to an embodiment of the present disclosure
  • FIG. FIG. 2 is an external view of the indoor unit shown in FIG. 1 as viewed obliquely from below
  • FIG. 2 is a block diagram of the multi-type air conditioner shown in FIG. 1
  • FIG. 2 is a flowchart for explaining the operation of the multi-type air conditioner shown in FIG. 1 when a cleaning operation is requested;
  • FIG. 1 shows a configuration diagram of a multi-type air conditioner 1 according to an embodiment of the present disclosure.
  • the multi-type air conditioner 1 includes an outdoor unit 10 and three indoor units 20A, 20B, and 20C. It is connected to the outdoor unit 10 via piping.
  • the indoor unit 20A has an A-room heat exchanger 24A and an A-room fan 25A.
  • the indoor unit 20B has a B room heat exchanger 24B and a B room fan 25B.
  • the indoor unit 20C has a C-room heat exchanger 24C and a C-room fan 25C.
  • the number of indoor units is three, but the number of indoor units can be any number of two or more. Also, in the following description, the room in which the indoor unit 20A is installed is called room A, the room in which 20B is installed is called room B, and the room in which the indoor unit 20C is installed is called room C.
  • the outdoor unit 10 includes a compressor 11, a four-way switching valve 12, an outdoor heat exchanger 13, an outdoor fan 15, an accumulator 16, and three electric expansion valves EVA, EVB, EVC.
  • One of the four ports of the four-way switching valve 12 is connected to the discharge side of the compressor 11, another one is connected to one end of the outdoor heat exchanger 13, and another one is connected to one end of the accumulator 16, Yet another one is connected to one end of A-chamber heat exchanger 24A, B-chamber heat exchanger 24B and C-chamber heat exchanger 24C via three refrigerant pipe connections 18A, 18B, 18C.
  • the other end of the outdoor heat exchanger 13 is connected to one ends of three electric expansion valves EVA, EVB and EVC.
  • the other ends of the three electric expansion valves EVA, EVB, and EVC are connected to the A-compartment heat exchanger 24A, the B-compartment heat exchanger 24B, and the C-compartment heat exchanger 24A, 17B, and 17C, respectively, via three refrigerant pipe connections 17A, 17B, and 17C. connected to the other end of the device 24C.
  • the other end of the accumulator 16 is connected to the suction side of the compressor 11 .
  • An A-room fan 25A, a B-room fan 25B, and a C-room fan 25C are arranged near the A-room heat exchanger 24A, the B-room heat exchanger 24B, and the C-room heat exchanger 24C, respectively.
  • the A room fan 25A is driven by an A room fan motor 26A (see FIG. 3).
  • the B room fan 25B and the C room fan 25C are also driven by indoor fan motors (not shown).
  • Compressor 11, four-way selector valve 12, outdoor heat exchanger 13, electric expansion valves EVA, EVB, EVC, A-chamber heat exchanger 24A, B-chamber heat exchanger 24B and C-chamber heat exchanger 24C , and an accumulator 16 are connected by refrigerant pipes to form a refrigerant circuit 3 .
  • the refrigerant circuit 3 uses, for example, slightly flammable R32 as a refrigerant.
  • a discharge pipe temperature sensor 31 is arranged on the discharge side of the compressor 11 .
  • An outdoor heat exchanger temperature sensor 32 for detecting the outdoor heat exchanger temperature is arranged in the outdoor heat exchanger 13, and an outdoor temperature sensor 33 for detecting the outdoor temperature is arranged near the outdoor heat exchanger 13. are placed.
  • An A-room heat exchanger temperature sensor 45A for detecting the indoor heat exchanger temperature is arranged in the A-room heat exchanger 24A, and an A-room temperature sensor 46A for detecting the indoor temperature is arranged near the A-room heat exchanger 24A. and an A room humidity sensor 47A for detecting indoor humidity.
  • a B-room heat exchanger temperature sensor 45B for detecting the indoor heat exchanger temperature is arranged in the B-room heat exchanger 24B, and a B-room temperature sensor 46B for detecting the indoor temperature is arranged near the B-room heat exchanger 24B. and a room B humidity sensor 47B for detecting indoor humidity.
  • a C-chamber heat exchanger temperature sensor 45C for detecting the indoor heat exchanger temperature is arranged in the C-chamber heat exchanger 24C.
  • a sensor 46C and a C-chamber humidity sensor 47C for detecting the indoor humidity are arranged.
  • FIG. 2 is a perspective view of the indoor unit 20A viewed obliquely from below.
  • the indoor unit 20A is a ceiling cassette type (ceiling embedded type) indoor unit.
  • the three indoor units 20A, 20B, and 20C are all ceiling cassette type indoor units, but some or all of them may be wall-mounted or floor-mounted indoor units.
  • the indoor unit 20A includes a casing body 101, a rectangular panel 102 attached to the lower side of the casing body 101, and a grill 103 detachably attached to the panel 102.
  • the surface of the panel 102 has light emitting diodes (LEDs), and the A room display unit 28A (see FIG. 3) is provided.
  • LEDs light emitting diodes
  • a blowout port 110 is provided along the short side of the panel 102 on one side in the longitudinal direction of the panel 102 .
  • a flap 120 is attached to the panel 102 .
  • the flap 120 is driven by the A-chamber flap drive motor 27A (see FIG. 3) to be rotatable relative to the panel 102 within a predetermined angular range, thereby opening and closing the outlet 110 .
  • FIG. 3 shows a state where the outlet 110 is closed by the flap 120 .
  • a drain socket 107 protrudes from the side wall of the casing body 101 .
  • a drain hose (not shown) is connected to the drain socket 107 from the outside.
  • pipe connection portions 105 and 106 protrude from side walls of the casing main body 101 .
  • Refrigerant pipes (not shown) are connected to the pipe connection portions 105 and 106 from the outside.
  • Suspension fittings 111 to 113 protrude laterally from the casing main body 101 .
  • an electrical component section 108 is arranged near the casing main body 101 .
  • FIG. 3 is a block diagram of the air conditioner 1 according to this embodiment. Since the three indoor units 20A, 20B, and 20C have the same structure in this embodiment, the indoor unit 20A will be mainly described here. Also, the illustration of the indoor units 20B and 20C is simplified in FIG.
  • the outdoor unit 10 includes an outdoor control unit 51 comprising a microcomputer including an arithmetic device and a storage device, an input/output circuit, and the like.
  • the indoor units 20A, 20B, and 20C respectively include indoor controllers 52A, 52B, and 52C each including a microcomputer including an arithmetic device and a storage device, an input/output circuit, and the like.
  • the outdoor control unit 51 and the indoor control unit 52A are connected by a communication line LA
  • the outdoor control unit 51 and the indoor control unit 52B are connected by a communication line LB
  • the outdoor control unit 51 and the indoor control unit 52C are connected by a communication line LC.
  • the outdoor controller 51 and the three indoor controllers 52A, 52B, and 52C communicate with each other via communication lines LA, LB, and LC, so that the outdoor controller 51 and the indoor controllers 52A, 52B, and 52C operate as multi-type air It operates as the control section 50 of the harmony machine 1 .
  • Temperature detection signals from the discharge pipe temperature sensor 31, the outdoor heat exchanger temperature sensor 32, and the outdoor temperature sensor 33 are supplied to the outdoor control unit 51.
  • the outdoor control unit 51 also controls the compressor 11, the four-way switching valve 12, the outdoor fan motor 14, the electric expansion valves EVA, EVB, EVC, and the like.
  • Detection signals from the A-room heat exchanger temperature sensor 45A, the A-room temperature sensor 46A, and the A-room humidity sensor 47A are supplied to the indoor control unit 52A.
  • the indoor control unit 52A also controls the A-room fan motor 26A, the A-room flap drive motor 27A, the A-room display unit 28A, the A-room communication unit 29A, and the like.
  • the A-room communication unit 29A performs wireless communication with a user-operable remote controller (not shown) (hereinafter referred to as "remote controller").
  • the control unit 50 controls the operation of the air conditioner 1 in response to commands from the remote controller.
  • the remote control has a liquid crystal display unit or a light emitting diode (LED), and can notify the user by means of light, characters, graphics, or the like.
  • LED light emitting diode
  • control unit 50 rotates the air conditioning operation including the cooling operation and the heating operation, the A room fan 25A, the B room fan 25B and the C room fan 25C in each indoor unit.
  • a cleaning operation which will be described later, can be executed.
  • the outdoor control unit 51 switches the four-way switching valve 12 to the position indicated by the dotted line in FIG. start driving. At this time, the outdoor control unit 51 opens the electric expansion valve EVA to a predetermined degree of opening, while closing the electric expansion valves EVB and EVC.
  • the high-temperature and high-pressure gas refrigerant discharged from the compressor 11 is condensed by heat exchange with the outdoor air in the outdoor heat exchanger 13 functioning as a condenser by the outdoor control unit 51 rotating the outdoor fan 15. It becomes a liquid refrigerant.
  • the liquid refrigerant from the outdoor heat exchanger 13 reaches the A-room heat exchanger 24A after being decompressed by the electric expansion valve EVA.
  • the indoor control unit 52A operates the A-room fan 25A
  • the decompressed liquid refrigerant evaporates by heat exchange with the indoor air in the A-room heat exchanger 24A functioning as an evaporator, and becomes a gaseous refrigerant.
  • the indoor control unit 52A moves the flap 120 to the position where the air outlet 110 opens, so that the air cooled by the room A heat exchanger 24A is discharged from the air outlet 110.
  • the outdoor control unit 51 switches the four-way switching valve 2 to the solid line position shown in FIG. At this time, the outdoor controller 51 opens all the electric expansion valves EVA, EVB, and EVC to predetermined opening degrees. Therefore, when the indoor unit 20A performs the heating operation, the high-temperature refrigerant also flows into the other indoor units 20B and 20C. This is to prevent the refrigerant from staying in the indoor units 20B and 20C that do not perform the heating operation and in the refrigerant pipes before and after them.
  • the high-temperature and high-pressure gas refrigerant discharged from the compressor 11 is condensed by heat exchange with indoor air in the A-room heat exchanger 24A functioning as a condenser by the indoor controller 52A operating the A-room fan 25A. and becomes a liquid refrigerant.
  • the refrigerant from the A-chamber heat exchanger 24A, the B-chamber heat exchanger 24B, and the C-chamber heat exchanger 24C reaches the outdoor heat exchanger 13 after being decompressed by the electric expansion valves EVA, EVB, and EVC. .
  • control unit 50 The details of control of the outdoor unit 10 and the indoor units 20A, 20B, and 20C by the control unit 50 are changed by commands from the remote controller.
  • the remote controller By operating the remote controller, the user can request the multi-type air conditioner 1 to select heating operation or cooling operation, start operation, stop operation, set room temperature and air volume, and start and stop cleaning operation.
  • the controller 50 executes the evaporator phase of the cleaning operation in step S1. Specifically, the four-way switching valve 12 is switched to the position indicated by the dotted line in FIG. 1, and the operation of the compressor 11 is started.
  • the controller 50 also drives the room A fan motor 26A to rotate the room A fan 25A at a predetermined number of revolutions, and drives the room A flap drive motor 27A to move the flap 120 to the position where the outlet 110 opens. .
  • the control unit 50 opens the electric expansion valve EVA to a predetermined degree of opening, while closing the electric expansion valves EVB and EVC.
  • the A-room heat exchanger 24A functions as an evaporator as in the cooling operation, and the evaporator phase of the cleaning operation starts.
  • the temperature of the A-compartment heat exchanger 24A becomes higher than 0° C. and below the dew point temperature, moisture in the air begins to condense on the surface of the A-compartment heat exchanger 24A. This condensed water can clean the dirt adhering to the surface of the A-chamber heat exchanger 24A.
  • the temperature of the A-compartment heat exchanger 24A may be kept below the freezing point so that the surface of the A-compartment heat exchanger 24A is frosted with moisture in the air.
  • the length of the evaporator phase is a predetermined time.
  • the length of the evaporator phase is calculated by the control unit 50 from the environmental conditions (room temperature and humidity of room A, outdoor temperature). It may be the time until After the evaporator phase ends, the controller 50 stops the operation of the compressor 11 .
  • step S2 the controller 50 executes the blowing phase of the cleaning operation. Specifically, following step S1, the room A fan motor 26A is driven to rotate the room A fan 25A. Then, the position of the flap 120 is maintained at the same position as in step S1. Since the compressor 11 is stopped in the blowing phase, the temperature of the A-room heat exchanger 24A is higher than the temperature of the A-room heat exchanger 24A in the evaporator phase. The temperature of the A-compartment heat exchanger 24A usually exceeds the dew point temperature. By rotating the A room fan 25A, the evaporation of the moisture condensed on the A room heat exchanger 24A can be accelerated.
  • the number of rotations of the A-room fan 25A and the blowing time are fixed at constant values. It should be noted that the compressor 11 does not have to be stopped if the temperature of the A-room heat exchanger 24A is higher than the temperature of the A-room heat exchanger 24A in the evaporator phase in the ventilation phase.
  • the controller 50 executes the condenser phase of the cleaning operation. Specifically, the four-way switching valve 12 is switched to the solid line position shown in FIG. 1 to start the operation of the compressor 11 .
  • the controller 50 drives the room A fan motor 26A to rotate the room A fan 25A at a predetermined number of revolutions, and maintains the position of the flap 120 at the same position as in step S1. .
  • the controller 50 opens all the electric expansion valves EVA, EVB, and EVC to predetermined opening degrees.
  • the A-room heat exchanger 24A functions as a condenser as in the heating operation, and the condenser phase of the cleaning operation starts.
  • the temperature of the A-compartment heat exchanger 24A is higher than the temperature of the A-compartment heat exchanger 24A in the ventilation phase. Therefore, the evaporation of moisture remaining on the surface of the A-compartment heat exchanger 24A can be further accelerated.
  • the length of the condenser phase may be a predetermined amount of time.
  • the controller 50 stops the compressor 11 and the A-chamber fan 25A, drives the A-chamber flap drive motor 27A, and moves the flap 120 to a position where the outlet 110 is closed.
  • the condenser phase can be omitted, for example, if the blowing phase of step S2 is made sufficiently long.
  • the user can set which one is prioritized when there are requests to execute the operation of two or more indoor units at the same time.
  • operation modes “When there is a request to execute operation for two or more indoor units at the same time", the case where the operation of one of the indoor units is requested first, and the case where two or more indoor units are requested to operate Includes both and when driving is requested at the same time.
  • the request for the air conditioning operation and the request for the cleaning operation are referred to as operation requests.
  • the multi-type air conditioner 1 has five operation modes from first to fifth described below regarding which indoor unit is preferentially operated.
  • the first mode is when there is a request for air conditioning operation or cleaning operation in one of the indoor units 20A, 20B, 20C and a request for air conditioning operation or cleaning operation in another indoor unit 20A, 20B, 20C at the same time.
  • the second mode is a mode for preferentially executing an operation according to a later request.
  • a user can select either the first mode or the second mode by operating a remote controller or a central control panel (not shown). For example, if one of the successive operation requests requests the heating operation and the other requests the cooling operation, it is not possible to execute the operation related to the subsequent request in the first mode. However, if both of the preceding and succeeding operation requests request the cooling operation, the cooling operation related to the subsequent request can be executed in the first mode.
  • the third mode when there is a request for air conditioning operation or cleaning operation in the indoor unit 20A and a request for air conditioning operation or cleaning operation in the other indoor units 20B and 20C, priority is given to operation in the indoor unit 20A. It is a mode to execute by Similarly, the fourth mode is a mode in which the operation of the indoor unit 20B is preferentially executed, and the fifth mode is a mode in which the operation of the indoor unit 20C is preferentially executed. A user can select only one of the third mode, the fourth mode, and the fifth mode by operating a remote controller or a central control panel (not shown).
  • the heating operation can be performed in the indoor unit 20A. Cooling operation at 20B cannot be executed.
  • the heating operation can be performed in either indoor unit.
  • the indoor unit 20B whose operation is requested first and the indoor unit 20C whose operation is requested later are the first to be operated. priority is given to the indoor unit 20B. In such a case, priority may be given to the indoor unit 20C whose operation is requested later.
  • the multi-type air conditioner 1 can operate in one of the first to fifth modes, and further, one mode selected from the first mode and the second mode, and the third mode. It can also operate in two modes, one mode selected from the fifth mode. Then, if one mode selected from the first mode and the second mode and one mode selected from the third to fifth modes collide with each other, in the present embodiment, the third ⁇ 5th mode is given priority. For example, when operating in the first mode and the third mode, if the cooling operation of the indoor unit 20B is requested first and then the heating operation of the indoor unit 20A is requested, priority is given to the first mode. The cooling operation of the indoor unit 20B is interrupted and the heating operation of the indoor unit 20A is performed according to the rule of the third mode. In such a case, priority may be given to the first and second modes.
  • step S11 the control unit 50 determines whether at least one of the indoor units 20A and 20C installed in the A room and the C room is in the air conditioning operation or the cleaning operation. to judge whether In step S11, the control unit 50 also determines whether the heating operation in the indoor unit 20B and the air conditioning operation or the cleaning operation in at least one of the indoor units 20A and 20C are requested at the same time.
  • “simultaneously” includes not only the case of being performed at the same time, but also the case where the indoor units 20A and 20C are in a preparatory state before starting the air-conditioning operation or the cleaning operation.
  • the indoor unit 20B may be performing the cleaning operation or the cooling operation, or may not be performing either operation. In the following description, it is assumed that the indoor unit 20B was in a dormant state in which no operation was performed when the heating operation was requested.
  • step S12 the controller 50 determines in step S12 whether at least one of the indoor units 20A and 20C is in cooling operation.
  • step S12 the control unit 50 also determines whether the heating operation in the indoor unit 20B and the cooling operation in at least one of the indoor units 20A and 20C are requested at the same time.
  • “simultaneously” includes not only the case where the operation is performed at the same time, but also the case where the indoor units 20A and 20C are in a preparatory state before starting the cooling operation.
  • step S13 If this condition is met (S12: YES), proceed to step S13.
  • the indoor unit 20C is in a resting state and is not in operation, and only the indoor unit 20A is in operation.
  • the second mode that is, the "boost priority mode" in which priority is given to the previously requested operation, is effective.
  • the indoor unit 20B which is prioritized in the fourth mode, requests the heating operation. Therefore, the control unit 50 starts the heating operation in the indoor unit 20B according to the rules of the second mode and the fourth mode.
  • step S13 the control unit 50 causes the heating operation of the indoor unit 20B. start driving.
  • the multi-type air conditioner 1 enters a state of waiting for the next instruction while executing the heating operation in the indoor unit 20B (hereinafter referred to as "heating operation state").
  • the control unit 50 causes the display unit or the remote controller of the indoor unit 20A of the A room to display "The cooling operation is interrupted due to mode conflict with another room. ” is displayed to notify the user.
  • step S14 the control unit 50 determines whether at least one of the indoor units 20A, 20C is executing the evaporator phase or the ventilation phase of the cleaning operation, or is in the ventilation operation.
  • step S14 the control unit 50 also determines whether the heating operation in the indoor unit 20B and the operation other than the cooling operation in at least one of the indoor units 20A and 20C are simultaneously requested.
  • “simultaneously” includes not only the case where the operations are performed at the same time, but also the case where the indoor units 20A and 20C are in a preparatory state before starting operations other than the cooling operation.
  • step S15 the controller 50 causes the indoor unit 20A to operate (the evaporator phase or the ventilation phase of the cleaning operation) in violation of the rules of the second mode and the fourth mode. or fan operation). If the heating operation in the indoor unit 20B and the operation other than the cooling operation in the indoor unit 20A are requested at the same time, contrary to the rule of the fourth mode, in step S15, the control unit 50 Start the evaporator phase or blower operation of the wash operation on machine 20A. After the evaporator phase of the cleaning operation is continued or started, the multi-type air conditioner 1 sequentially shifts to the ventilation phase (S2) and the condenser phase (S3) of the cleaning operation described with reference to FIG.
  • the multi-type air conditioner 1 shifts to the condenser phase (S3).
  • the condenser phase ends, the multi-type air conditioner 1 enters a resting state, but the details are omitted here.
  • the multi-type air conditioner 1 waits for the next instruction while executing the blowing operation in the indoor unit 20A (hereinafter referred to as the "blowing operation state"). It will be maintained or will be in the fan operation state. In this case, the indoor unit 20B cannot perform the heating operation. Therefore, in step S15, the control unit 50 causes the display unit or the remote control of the indoor unit 20B of the room B to indicate that "heating operation cannot be performed due to mode conflict with another room.” is displayed to notify the user.
  • step S16 the indoor unit 20A is executing the condenser phase of the cleaning operation or heating operation.
  • the controller 50 starts the heating operation in the indoor unit 20B and continues the condenser phase or the heating operation in the indoor unit 20A in accordance with the rules of the second mode and the fourth mode. Specifically, the flap 120 of the indoor unit 20B is moved to a position where the outlet 110 is opened. Moreover, if necessary, the rotational speed of the compressor 11 and the opening degree of the electric expansion valve EVB are adjusted. If the heating operation of the indoor unit 20B and the heating operation of the indoor unit 20A are requested at the same time, the heating operation of the indoor unit 20A and the indoor unit 20B is started according to the rule of the fourth mode.
  • step S17 the controller 50 determines whether the condenser phase of the cleaning operation is being performed in the indoor unit 20A. If this condition is met (S17: YES), the process proceeds to step S18.
  • step S18 the controller 50 terminates the condenser phase when a predetermined time has elapsed since the start of the condenser phase in the indoor unit 20A. Specifically, the room A fan 25A is stopped, the room A flap drive motor 27A is driven, the flap 120 is moved to the position where the outlet 110 is closed, and the multi-type air conditioner 1 is brought into the heating operation state. If the condition of step S17 is not satisfied (S17: NO), the multi-type air conditioner 1 is shifted to the heating operation state without performing the process of step S18.
  • step S11 If the conditions in step S11 are not met (S11: NO), neither of the indoor units 20A, 20C is in operation.
  • the controller 50 starts the heating operation of the indoor unit 20B in step S19. Specifically, the four-way switching valve 2 is switched to the solid line position shown in FIG. 1, the compressor 11 is started to operate, and the electric expansion valves EVA, EVB, and EVC are each opened to a predetermined degree of opening. Further, the flap 120 of the indoor unit 20B is moved to the position where the outlet 110 is opened. As a result, the multi-type air conditioner 1 shifts to the heating operation state.
  • the operation when the heating operation of the indoor unit 20B is requested is the same as that described with reference to FIG.
  • the operation is determined according to the rules of the second mode or the fourth mode.
  • step S15 contrary to the rules of the second mode or the fourth mode, the indoor unit 20A continues to operate in either case.
  • step S13 the operation is determined according to the rule of the first mode or the third mode, the cooling operation of the indoor unit 20A is continued, and the heating operation of the indoor unit 20B is not performed.
  • step S15 the operation of the indoor unit 20A (the evaporator phase or the ventilation phase of the cleaning operation, or the ventilation operation) is continued in either case according to the rules of the first mode or the third mode.
  • step S31 the control unit 50 determines whether at least one of the indoor units 20B and 20C installed in the room B and the room C is in the air conditioning operation or the cleaning operation. to judge whether In step S31, the control unit 50 also determines whether the cleaning operation in the indoor unit 20A and the air conditioning operation or cleaning operation in at least one of the indoor units 20B and 20C are requested at the same time.
  • “simultaneously” includes not only the case of being performed at the same time, but also the case where the indoor units 20B and 20C are in a preparatory state before starting the air-conditioning operation or the cleaning operation.
  • the indoor unit 20A may be performing the air conditioning operation, or may not be performing any operation. In the following description, it is assumed that the indoor unit 20A was in a dormant state in which no operation was being performed when the cleaning operation was requested.
  • step S32 the control unit 50 determines whether at least one of the indoor units 20B and 20C is performing the heating operation or the condenser phase of the cleaning operation.
  • step S32 the control unit 50 also determines whether the cleaning operation in the indoor unit 20A and the heating operation in at least one of the indoor units 20B and 20C are requested at the same time.
  • “simultaneously” includes not only the case where the operations are performed at the same time, but also the case where the indoor units 20B and 20C are in a preparatory state before starting the heating operation.
  • step S33 the control unit 50 starts the cleaning operation of the indoor unit 20A in violation of the rule of the fourth mode, which is given priority over the second mode, and stops the operation of the indoor unit 20B (during the heating operation or the cleaning operation). condenser phase). Specifically, the four-way switching valve 2 is switched to the dotted line position shown in FIG. 1 to close the electric expansion valves EVB and EVC.
  • the rotation speed of the compressor 11, the rotation speed of the outdoor fan 15, and the rotation speed of the A room fan 25A are adjusted to values suitable for the evaporator phase of the cleaning operation in the indoor unit 20A, and the flap 120 of the indoor unit 20A is adjusted.
  • the outlet 110 is moved to a position where it opens.
  • the indoor fan 25B is stopped, and the flap 120 of the indoor unit 20B is moved to a position where the outlet 110 is closed.
  • the multi-type air conditioner 1 then sequentially shifts to the ventilation phase (S2) and the condenser phase (S3) of the cleaning operation described with reference to FIG. .
  • step S33 the control unit 50 notifies the user by displaying "operation will be stopped due to mode conflict with another room" by the display unit or the remote control of the indoor unit 20B of the B room.
  • step S32 If the conditions in step S32 are not met (S32: NO), the process proceeds to step S34.
  • the indoor unit 20C is not operating in a hibernation state.
  • the indoor unit 20B is executing the cooling operation, the air blowing operation, or the evaporator phase or the air blowing phase of the cleaning operation.
  • the control unit 50 starts the cleaning operation of the indoor unit 20A, contrary to the rule of the fourth mode that takes precedence over the second mode, and operates the indoor unit 20B (cooling operation, blowing operation, Or interrupt the evaporator phase or blower phase of the cleaning operation.
  • the indoor fan 25B is stopped, and the flap 120 of the indoor unit 20B is moved to a position where the outlet 110 is closed. Furthermore, if necessary, the electric expansion valve EVB is closed, the four-way switching valve 2 is switched to the position indicated by the dotted line in FIG. is adjusted to a value suitable for the evaporator phase of the cleaning operation in the indoor unit 20A, and the flap 120 of the indoor unit 20A is moved to a position where the outlet 110 opens.
  • the multi-type air conditioner 1 then sequentially shifts to the ventilation phase (S2) and the condenser phase (S3) of the cleaning operation described with reference to FIG. .
  • step S34 the control section 50 notifies the user by displaying "operation will be stopped due to mode conflict with another room" by the display section or remote control of the indoor unit 20B of the B room.
  • step S31 If the conditions in step S31 are not met (S31: NO), neither of the indoor units 20B and 20C is in operation.
  • the controller 50 starts the cleaning operation of the indoor unit 20A in step S37. Specifically, the four-way switching valve 2 is switched to the position indicated by the dotted line in FIG. 1, the compressor 11 is started to operate, and the electric expansion valve EVA is opened to a predetermined degree of opening. Further, the flap 120 of the indoor unit 20A is moved to the position where the outlet 110 is opened. Thereafter, the multi-type air conditioner 1 sequentially shifts to the ventilation phase (S2) and the condenser phase (S3) of the cleaning operation described with reference to FIG. Then, when the condenser phase ends, the multi-type air conditioner 1 enters a resting state.
  • S2 ventilation phase
  • S3 condenser phase
  • the cleaning operation in the indoor unit 20A is requested, the operation is the same as described in FIG. In these cases, in steps S33 and S34, the operation is determined according to the rules of the second mode or third mode.
  • the multi-type air conditioner 1 of the present embodiment is in the first mode, the fourth mode, the fifth mode, the first mode and the fourth mode, the first mode and the fifth mode, or the second mode and the fourth mode.
  • the operation when the cleaning operation in the indoor unit 20A is requested is also the same as described with reference to FIG. In these cases, in steps S33 and S34, the operation is determined to violate the rules of the first mode or the fourth mode.
  • the cooling operation request in the indoor unit 20A and the heating operation in the indoor unit 20B When there is an operation request at the same time, the indoor unit 20B performs the heating operation without performing the cooling operation in the indoor unit 20A. In this way, when the cooling operation and the heating operation collide with each other, the operation according to the operation mode enables operation according to the user's intention.
  • the request for the cleaning operation in the indoor unit 20A and the request for the heating operation in the indoor unit 20B are made at the same time.
  • the cleaning operation is performed in the indoor unit 20A without performing the heating operation in the indoor unit 20B. Therefore, regardless of the operation mode, it is possible to meet the user's request for cleaning operation.
  • step S14 may be changed so as to determine whether at least one of the indoor units 20A and 20C is in the cleaning operation or the air blowing operation. In this case, even when the indoor unit 20A of the room A is in the condenser phase of the cleaning operation in step S15, this is continued. Then, steps S17 and S18 are executed after step S15.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Signal Processing (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)
PCT/JP2022/007663 2021-03-12 2022-02-24 空気調和機 WO2022190885A1 (ja)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0942738A (ja) * 1995-07-21 1997-02-14 Sanyo Electric Co Ltd 空気調和装置の制御装置
JP2000193288A (ja) * 1998-12-28 2000-07-14 Sanyo Electric Co Ltd 空気調和装置
US20090211281A1 (en) * 2008-02-05 2009-08-27 Lg Electronics Inc. Air conditioning apparatus and method for determining the amount of refrigerant of air-conditioning apparatus
JP6786019B1 (ja) * 2020-03-05 2020-11-18 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

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7227509B2 (ja) 2021-03-12 2023-02-22 ダイキン工業株式会社 空気調和機

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0942738A (ja) * 1995-07-21 1997-02-14 Sanyo Electric Co Ltd 空気調和装置の制御装置
JP2000193288A (ja) * 1998-12-28 2000-07-14 Sanyo Electric Co Ltd 空気調和装置
US20090211281A1 (en) * 2008-02-05 2009-08-27 Lg Electronics Inc. Air conditioning apparatus and method for determining the amount of refrigerant of air-conditioning apparatus
JP6786019B1 (ja) * 2020-03-05 2020-11-18 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

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