WO2017199683A1 - Climatiseur et procédé de commande de climatiseur - Google Patents

Climatiseur et procédé de commande de climatiseur Download PDF

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Publication number
WO2017199683A1
WO2017199683A1 PCT/JP2017/015964 JP2017015964W WO2017199683A1 WO 2017199683 A1 WO2017199683 A1 WO 2017199683A1 JP 2017015964 W JP2017015964 W JP 2017015964W WO 2017199683 A1 WO2017199683 A1 WO 2017199683A1
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WIPO (PCT)
Prior art keywords
refrigerant
indoor
type
unit
outdoor
Prior art date
Application number
PCT/JP2017/015964
Other languages
English (en)
Japanese (ja)
Inventor
恵介 三苫
晋一 五十住
隆博 加藤
Original Assignee
三菱重工サーマルシステムズ株式会社
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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Application filed by 三菱重工サーマルシステムズ株式会社 filed Critical 三菱重工サーマルシステムズ株式会社
Priority to CN201780010518.5A priority Critical patent/CN108700328A/zh
Priority to EP17799114.8A priority patent/EP3401612A4/fr
Publication of WO2017199683A1 publication Critical patent/WO2017199683A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32—Responding to malfunctions or emergencies
    • F24F11/36—Responding to malfunctions or emergencies to leakage of heat-exchange fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/49—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring ensuring correct operation, e.g. by trial operation or configuration checks
    • 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
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
    • 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
    • F25B6/00—Compression machines, plants or systems, with several condenser circuits
    • F25B6/02—Compression machines, plants or systems, with several condenser circuits arranged in parallel

Definitions

  • the present invention relates to an air conditioner and a control method of the air conditioner.
  • multi-type air conditioner in which a plurality of indoor units are connected to an outdoor unit, such as used in buildings or commercial facilities, the indoor unit and the outdoor unit are different types. May be sold separately.
  • the variation (type or capacity) of the indoor units tends to increase. Then, an outdoor unit corresponding to the selected indoor unit is selected.
  • the characteristics and safety measures of the air conditioner change depending on the type of refrigerant used in the multi-type air conditioner. For example, since the refrigerant of R410 is incombustible but the refrigerant of R32 is slightly incombustible, refrigerant leakage detection is required for the air conditioner. Therefore, although it is necessary to use an outdoor unit or an indoor unit corresponding to the type of refrigerant, the indoor unit has many variations, and if the type of refrigerant is further matched, the number of variations is enormous.
  • the supply side such as the indoor unit manufacturer and the sales company produces various types of indoor units in a small amount, and inventory control also becomes general, resulting in higher cost. As a result, the selling price of indoor units per unit increases.
  • an outdoor unit provided with a compressor may require a change in hardware configuration depending on the type of refrigerant.
  • the indoor unit may need to change the control program even though the hardware configuration does not need to be changed.
  • Patent Document 1 includes control program storage means for storing a plurality of control programs for controlling the refrigeration cycle according to the type of refrigerant, and based on the control program stored in the control program storage means, the type of refrigerant An air conditioning control device is described which controls the refrigeration cycle according to the above.
  • the air conditioning control device described in Patent Document 1 determines the type of refrigerant by a CPU that controls an indoor unit. This determination method is performed by calculating the pressure-enthalpy ratio of the refrigerant in the compression process based on the suction temperature and pressure of the compressor, and the discharge temperature and pressure, and comparing the pressure-enthalpy ratio data corresponding to the type of refrigerant. .
  • the type of refrigerant is determined by the CPU that controls the indoor unit. Further, in Patent Document 1, control data is selected according to the type of refrigerant in the indoor unit, control data or refrigerant type information is transmitted to the outdoor unit, and control data or refrigerant type information received in the outdoor unit is selected. It is described that it memorizes or specifies. That is, the air conditioning control device described in Patent Document 1 determines the type of refrigerant on the indoor unit side, sets control data, and transmits the information to the outdoor unit side.
  • the present invention has been made in view of such circumstances, and provides an air conditioner and a control method of the air conditioner, which enables a large number of indoor units to be easily used according to the type of refrigerant.
  • the purpose is
  • control method of the control method of the air harmony device and the air harmony device of the present invention adopts the following means.
  • An air conditioner includes an outdoor unit, a plurality of indoor units connected to the outdoor unit via a refrigerant pipe, and an outdoor control provided in the outdoor unit to control the outdoor unit.
  • the air conditioning apparatus includes an outdoor unit and a plurality of indoor units connected to the outdoor unit via a refrigerant pipe.
  • the outdoor unit is controlled by the outdoor control means provided in the outdoor unit.
  • Each indoor unit is controlled by indoor control means provided for each indoor unit.
  • the indoor unit connected to the outdoor unit needs to be controlled according to the refrigerant to be used. Therefore, the outdoor control means transmits a refrigerant type signal indicating the type of refrigerant to be used, or a function necessity signal indicating the necessity of the function according to the type of refrigerant, to the plurality of indoor control means. Control corresponding to the type of refrigerant indicated by the refrigerant type signal received from the outdoor control means is performed by the indoor control means. Further, control corresponding to the function indicated by the function necessity signal is performed by the indoor control means.
  • the outdoor control means transmits the refrigerant type signal or the function necessity signal to the plurality of indoor control means, and the control corresponding to the type of refrigerant indicated by the refrigerant type signal or the function indicated by the function necessity signal Control is performed by the indoor control device. Therefore, this configuration makes it possible to easily use a large number of indoor units in accordance with the type of refrigerant.
  • the indoor control means may set necessity / unnecessity of a function related to refrigerant leak detection in accordance with the type of refrigerant.
  • the function related to refrigerant leak detection is turned off when the refrigerant is nonflammable, and the function related to refrigerant leak detection is turned on when the refrigerant is combustible. Control is possible.
  • the indoor control means may change the target temperature of the heat exchanger provided in the indoor unit in accordance with the type of refrigerant.
  • the indoor control means may change the air volume of the fan provided in the indoor unit in accordance with the type of refrigerant.
  • a control method of an air conditioner includes an outdoor unit, a plurality of indoor units connected to the outdoor unit via a refrigerant pipe, and the outdoor unit, and controls the outdoor unit.
  • a control method of an air conditioning apparatus comprising: outdoor control means for controlling the indoor unit; and a plurality of indoor control means for controlling the indoor unit provided for each of the indoor units, wherein the outdoor control means is a refrigerant to be used
  • the refrigerant type signal indicating the type, or the function necessity signal indicating the necessity of the function according to the type of refrigerant is transmitted to the plurality of indoor control means, and the indoor control means receives the refrigerant received from the outdoor control means Control corresponding to the type of refrigerant indicated by the type signal or control corresponding to the function indicated by the function necessity signal is performed.
  • FIG. 2 is a refrigerant circuit diagram of the multi-type air conditioner according to the first embodiment of the present invention.
  • FIG. 6 is a block diagram showing an electrical configuration of an outdoor control unit and an indoor control unit according to the used refrigerant corresponding control according to the embodiment of the present invention. It is a flow chart which shows a flow of processing concerning control of correspondence to refrigerants concerning an embodiment of the present invention.
  • coolant circuit diagram of the multi type air conditioning apparatus 1 concerning this embodiment is shown by FIG.
  • the multi-type air conditioner 1 includes a branching unit 9 between the outdoor unit 3, the gas side piping 5 and the liquid side piping 7 drawn from the outdoor unit 3, and the gas side piping 5 and the liquid side piping 7.
  • the plurality of indoor units 11A and 11B are connected in parallel via each other.
  • the outdoor unit 3 includes an inverter-driven compressor 13 for compressing the refrigerant, an oil separator 15 for separating the refrigerator oil from the refrigerant gas, a four-way switching valve 17 for switching the refrigerant circulation direction, the refrigerant and the outside air.
  • An accumulator 31 that separates the liquid component and causes only the gas component to be sucked into the compressor 13, a gas side operation valve 33, and a liquid side operation valve 35 are provided.
  • the above-described devices on the outdoor unit 3 side are connected in a known manner via refrigerant pipes 37 such as a discharge pipe 37A, a gas pipe 37B, a liquid pipe 37C, a gas pipe 37D, a suction pipe 37E, and a branch pipe 37F for supercooling.
  • the outdoor side refrigerant circuit 39 is configured.
  • the outdoor unit 3 is provided with an outdoor fan 41 for blowing the outside air to the outdoor heat exchanger 19.
  • an oil return circuit for returning a predetermined amount of refrigeration oil separated from the refrigerant gas discharged in the oil separator 15 to the compressor 13 side. 43 are provided.
  • the gas side pipe 5 and the liquid side pipe 7 are refrigerant pipes 37 connected to the gas side operation valve 33 and the liquid side operation valve 35 of the outdoor unit 3, and are connected to the outdoor unit 3 at the time of installation and construction at the site.
  • the length is set according to the distance between the indoor units 11A and 11B.
  • branching devices 9 are provided, and an appropriate number of indoor units 11 A and 11 B are connected via the branching devices 9.
  • a closed refrigeration cycle 45 is configured.
  • the indoor units 11A and 11B exchange indoor air through the indoor heat exchanger 47, the indoor expansion valve (EEVC) 49 for cooling, and the indoor heat exchanger 47, which exchange heat between the refrigerant and the indoor air and provide the room with air conditioning.
  • An indoor fan 51 to be circulated is provided, and is connected to the branching unit 9 via the branch gas side pipings 5A, 5B and the branch liquid side pipings 7A, 7B on the indoor side.
  • the outdoor unit 3 is provided with an outdoor control unit 53, and the indoor units 11A and 11B are provided with an indoor control unit 55, respectively.
  • the outdoor control unit 53 and the indoor control unit 55 are configured by, for example, a central processing unit (CPU), a random access memory (RAM), a read only memory (ROM), a computer readable storage medium, and the like. Then, a series of processes for realizing various functions are stored in the form of a program, for example, in a storage medium or the like in the form of a program, and the CPU reads this program into a RAM or the like to execute information processing and arithmetic processing. Thus, various functions are realized.
  • the program may be installed in advance in a ROM or other storage medium, may be provided as stored in a computer-readable storage medium, or may be distributed via a wired or wireless communication means. Etc. may be applied.
  • the computer readable storage medium is a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, a semiconductor memory or the like.
  • the indoor control unit 55 transmits necessary control information to the outdoor control unit 53 based on input information from the suction air temperature sensor 63, the blowout air temperature sensor, the heat exchange temperature sensor, the heat exchange outlet temperature sensor, etc.
  • the opening degree of the expansion valve 49, the air volume by the indoor fan 51, and the like are appropriately controlled.
  • the indoor control unit 55 is configured to calculate the required capacity from the difference between the indoor temperature detected by the suction air temperature sensor 63 and the set temperature, and to transmit it to the outdoor control unit 53.
  • the outdoor control unit 53 controls the rotational speed of the compressor 13 and the opening degree of the outdoor expansion valve 23 based on control information from the indoor control unit 55 and input information from the outside air temperature sensor 57, the high pressure sensor 59, the low pressure sensor 61, and the like. And the like, and the four-way switching valve 17 is operated to switch between cooling and heating.
  • the outdoor control unit 53 can control the high pressure to the heating target high pressure (target pressure) HP based on the detection value of the high pressure sensor 59 during heating operation, and the low pressure based on the detection value of the low pressure sensor 61 during cooling operation.
  • the pressure can be controlled to the cooling target low pressure (target pressure) LP.
  • the cooling operation is performed as follows.
  • the high temperature / high pressure refrigerant gas compressed by the compressor 13 is discharged to the discharge pipe 37A, and the oil separator 15 separates the refrigerator oil contained in the refrigerant.
  • the refrigerant gas is circulated toward the gas pipe 37B by the four-way switching valve 17, heat-exchanged with the outside air blown by the outdoor fan 41 by the outdoor heat exchanger 19, and condensed and liquefied.
  • the liquid refrigerant is further cooled by the subcooling coil 21, passes through the outdoor expansion valve 23, and is temporarily stored in the receiver 25.
  • the liquid refrigerant whose circulation amount has been adjusted by the receiver 25 is partially divided into the subcooling branch pipe 37F in the process of being circulated through the subcooling heat exchanger 27 through the liquid pipe 37C, and the subcooling expansion valve
  • the refrigerant is heat-exchanged with the adiabatically expanded refrigerant in (EEVSC) 29 to provide a degree of subcooling.
  • the liquid refrigerant is led from the outdoor unit 3 to the liquid side pipe 7 through the liquid side operation valve 35, and the liquid refrigerant led to the liquid side pipe 7 is branched by the brancher 9 into branches of the indoor units 11A and 11B. It is diverted to liquid side piping 7A and 7B.
  • the liquid refrigerant divided into the branched liquid side pipes 7A and 7B flows into the indoor units 11A and 11B, is adiabatically expanded by the indoor expansion valve (EEVC) 49, and becomes a gas-liquid two-phase flow to the indoor heat exchanger 47 Flowed into.
  • EEVC indoor expansion valve
  • the indoor heat exchanger 47 heat is exchanged between the indoor air and the refrigerant circulated by the indoor fan 51, and the indoor air is cooled and provided for indoor cooling.
  • the refrigerant is gasified, passes through the branch gas side pipes 5A and 5B, and reaches the branch 9 and is merged with the refrigerant gas from the other indoor unit 11 by the gas side pipe 5.
  • the refrigerant gas joined in the gas side pipe 5 returns to the outdoor unit 3 again, passes through the gas side operation valve 33, the gas pipe 37D, and the four-way switching valve 17 to reach the suction pipe 37E, and the refrigerant from the supercooling branch pipe 37F After being joined with the gas, it is introduced into the accumulator 31.
  • the liquid contained in the refrigerant gas is separated, and only the gas is drawn into the compressor 13.
  • the refrigerant is compressed again in the compressor 13, and the cooling operation is performed by repeating the above cycle.
  • the heating operation is performed as follows.
  • the high-temperature and high-pressure refrigerant gas compressed by the compressor 13 is discharged to the discharge pipe 37A, and after the refrigerator oil contained in the refrigerant is separated by the oil separator 15, the four-way switching valve 17 It is circulated to
  • the refrigerant is drawn from the outdoor unit 3 through the gas side operation valve 33 and the gas side pipe 5, and is further introduced into the indoor units 11A and 11B through the branch 9 and the branch gas side pipes 5A and 5B on the indoor side. .
  • the high-temperature and high-pressure refrigerant gas introduced into the indoor units 11A and 11B is heat-exchanged with the indoor air circulated through the indoor fan 51 by the indoor heat exchanger 47, and the indoor air is heated and provided for indoor heating. Ru.
  • the liquid refrigerant condensed in the indoor heat exchanger 47 passes through the indoor expansion valve (EEVC) 49 and the branch liquid side pipes 7A and 7B to reach the branch 9 and is merged with the refrigerant from the other indoor unit 11, It is returned to the outdoor unit 3 through the liquid side pipe 7.
  • EEVC indoor expansion valve
  • the refrigerant returned to the outdoor unit 3 passes through the liquid side operation valve 35 and the liquid pipe 37C to reach the subcooling heat exchanger 27, and after being subcooled as in the cooling operation, flows into the receiver 25.
  • the circulation amount is adjusted by being temporarily stored.
  • the liquid refrigerant is supplied to the outdoor expansion valve (EEVH) 23 through the liquid pipe 37C, adiabatically expanded there, and then flows into the outdoor heat exchanger 19 through the subcooling coil 21.
  • the refrigerant exchanges heat with the outside air blown from the outdoor fan 41, and the refrigerant absorbs heat from the outside air to be vaporized and gasified.
  • This refrigerant flows from the outdoor heat exchanger 19 through the gas pipe 37 B, the four-way switching valve 17, and the suction pipe 37 E, joins with the refrigerant from the supercooling branch pipe 37 F, and is introduced into the accumulator 31.
  • the liquid contained in the refrigerant gas is separated, and only the gas is drawn into the compressor 13 and compressed again in the compressor 13. The heating operation is performed by repeating the above cycle.
  • the outdoor unit 3 provided with the compressor 13 needs to change the specification according to the type of refrigerant used.
  • the indoor unit 11 the main components are the indoor heat exchanger 47, the indoor expansion valve 49, the indoor fan 51, etc.
  • the indoor unit 11 is shared. It is possible to use it. That is, while the outdoor unit 3 needs to change the hardware configuration depending on the type of refrigerant used, the indoor unit 11 can cope without changing the hardware configuration, but a change in control of the indoor unit 11 is required. .
  • the multi-type air conditioning apparatus 1 performs used refrigerant correspondence control that changes the control of the indoor unit 11 according to the type of used refrigerant.
  • FIG. 2 is a block diagram showing an electrical configuration of the outdoor control unit 53 and the indoor control unit 55 according to the used refrigerant correspondence control.
  • the outdoor control unit 53 includes a refrigerant type setting unit 60, a refrigerant type signal generation unit 62, and a transmission unit 64.
  • the refrigerant type setting unit 60 is, for example, a dip switch, and the type of refrigerant used is set by switching the switch.
  • the refrigerant type setting unit 60 is not limited to the dip switch, and may be, for example, software in which a refrigerant type is defined, or information stored in a storage unit (not shown).
  • the refrigerant type signal generation unit 62 reads the type of refrigerant used from the refrigerant type setting unit 60, and generates a refrigerant type signal indicating the read type.
  • the transmitting unit 64 transmits the refrigerant type signal to the indoor control unit 55.
  • the refrigerant type signal is simultaneously transmitted from the transmission unit 64 to a plurality of indoor control units 55 provided for each indoor unit 11.
  • the indoor control unit 55 includes a receiving unit 66, a control setting unit 68, a storage unit 70, and a control unit 72.
  • the receiving unit 66 receives the refrigerant type signal from the outdoor control unit 53.
  • the control setting unit 68 sets control of the indoor unit 11 corresponding to the type of refrigerant used indicated by the refrigerant type signal.
  • the storage unit 70 stores control information indicating control contents corresponding to the type of refrigerant used.
  • the control setting unit 68 reads control content corresponding to the type of refrigerant used from the storage unit 70, and performs control setting of the indoor unit 11 based on the control content.
  • the control unit 72 performs control on the indoor unit 11 based on the control content set by the control setting unit 68.
  • FIG. 3 is a flowchart showing a flow of processing relating to the used refrigerant corresponding control according to the present embodiment.
  • compatible control is performed, for example, when driving
  • the present invention is not limited to this, and the power supply of the indoor unit 11 and the outdoor unit 3 may be switched on or off, or a new indoor unit 11 may be added, or the type of refrigerant used may be changed.
  • the used refrigerant corresponding control may be executed.
  • step 100 the outdoor control unit 53 reads the type of refrigerant used and generates a refrigerant type signal.
  • the outdoor control unit 53 transmits a refrigerant type signal to the indoor control unit 55.
  • the indoor control unit 55 for each indoor unit 11 receives the refrigerant type signal from the outdoor control unit 53.
  • the outdoor control unit 53 is made aware of the type of refrigerant used and all indoor control connected It is suitable to transmit the refrigerant type signal to the unit 55 from the viewpoint of processing efficiency.
  • the indoor control unit 55 sets control corresponding to the type of refrigerant indicated by the refrigerant type signal.
  • the set control content is transmitted from the indoor control unit 55 to the outdoor control unit 53.
  • the outdoor control unit 53 can grasp the control contents by the indoor control unit 55, so that the outdoor control unit 53 can perform control according to the control contents by the indoor control unit 55 like a refrigerant leak detection function described later. Become.
  • the indoor control unit 55 executes control corresponding to the used refrigerant based on the setting in step 106.
  • control contents corresponding to the type of refrigerant used will be described.
  • the indoor control unit 55 sets the necessity of the function related to the refrigerant leak detection (hereinafter referred to as the “refrigerant leak detection function”) in accordance with the type of the used refrigerant.
  • the refrigerant leak detection function is, for example, an external refrigerant leak detector, a reception function of the detection result by the refrigerant leak detector, or a warning function to the user when a refrigerant leak is detected, etc. It is.
  • the outdoor unit 3 and the indoor unit 11 use a larger amount of refrigerant than the one-to-one air conditioning apparatus, the amount of leakage when the refrigerant leaks also increases. For this reason, it is necessary to appropriately use a safety device such as a refrigerant leak detector corresponding to the type of refrigerant used.
  • R410A is a nonflammable refrigerant
  • R32 is a slightly flammable refrigerant. Therefore, when the refrigerant used is R410A, the refrigerant leak detection function is not necessary, and this function is turned off. On the other hand, when the refrigerant used is R410A, a refrigerant leak detection function is required, and this function is turned on. Thereby, the multi-type air conditioning apparatus 1 can perform appropriate control depending on the presence or absence of the flammability of the used refrigerant.
  • the outdoor control unit 53 moves the refrigerant on the indoor unit 11 side to the outdoor unit 3 side, a so-called pump-down operation. After that, the operation of the multi-type air conditioner 1 is stopped. In addition, the outdoor control unit 53 closes a valve provided in a refrigerant pipe 37 connecting the outdoor unit 3 and the indoor unit 11 or the like.
  • the indoor control unit 55 changes the target temperature of the indoor heat exchanger 47 provided in the indoor unit 11 according to the type of refrigerant used. Since the degree of superheat during the cooling operation and the degree of subcooling during the heating operation differ depending on the characteristics of the used refrigerant, an appropriate degree of superheat and subcooling will be set according to the type of the used refrigerant.
  • the target temperature corresponding to the used refrigerant is stored in the storage unit 70.
  • the indoor control unit 55 changes the air volume of the indoor fan 51 provided in the indoor unit 11 in accordance with the type of refrigerant used. Since the required air volume is different depending on the characteristics of the used refrigerant, an appropriate air volume is set according to the type of the used refrigerant.
  • the air volume corresponding to the used refrigerant is stored in the storage unit 70 as the number of revolutions of the indoor fan 51 as an example.
  • the multi-type air conditioner 1 is provided in the outdoor unit 3 and is provided for each of the outdoor control unit 53 that controls the outdoor unit and the indoor unit 11 to control the indoor unit 11 A plurality of indoor control units 55 are provided. Then, the outdoor control unit 53 transmits a refrigerant type signal indicating the type of refrigerant used to the plurality of indoor control units 55. The indoor control unit 55 performs control corresponding to the type of refrigerant used indicated by the refrigerant type signal received from the outdoor control unit 53.
  • the refrigerant type signal is transmitted from the outdoor control unit 53 to the plurality of indoor control units 55, and the indoor control unit 55 performs control corresponding to the type of refrigerant indicated by the refrigerant type signal. Therefore, the multi-type air conditioning apparatus 1 according to the present embodiment can easily use the large number of indoor units 11 connected to the outdoor unit 3 in accordance with the type of refrigerant.
  • the outdoor control unit 53 may transmit, to the indoor control unit 55, a function necessity signal indicating whether the function according to the type of refrigerant is necessary instead of the refrigerant type signal.
  • the function whose necessity is indicated by the function necessity signal is, for example, a refrigerant leak detection function, but the function is not limited to this, and other functions may be used if they need to be changed according to the type of refrigerant. May be
  • the outdoor control unit 53 performs the necessity determination of the function according to the type of the refrigerant.
  • the outdoor control unit 53 stores table data indicating necessity of a function according to the type of refrigerant, and determines the necessity of function by referring to the table data every time the type of refrigerant is set.
  • the manager of the multi-type air conditioner 1 inputs information indicating the necessity of the function according to the type of refrigerant to the outdoor control unit 53, and the outdoor control unit 53 receives the input information.
  • the function necessity signal may be transmitted to the indoor control unit 55 based on the above.
  • the indoor control unit 55 performs control corresponding to the function indicated by the received function necessity signal. More specifically, if the function required by the function necessity signal is not executed, the indoor control unit 55 starts the execution of the function. On the other hand, when the function requiring the function necessity signal is not in execution, the indoor control unit 55 stops the execution of the function. When the function required by the function necessity signal is in execution, the indoor control unit 55 continues to execute the function.

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  • General Engineering & Computer Science (AREA)
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Abstract

Le but de la présente invention est de faciliter l'utilisation d'une pluralité d'unités intérieures par l'association du type de fluide frigorigène correspondant à celles-ci. Un climatiseur (1) à types multiples comprend : une unité de commande extérieure (53) qui est disposée sur une unité extérieure (3) de manière à commander l'unité extérieure; et une pluralité d'unités de commande intérieures (55) qui sont chacune disposées sur une unité intérieure correspondante (11) de façon à commander l'unité intérieure correspondante (11). L'unité de commande extérieure (53) transmet, à la pluralité d'unités de commande intérieures (55), un signal de type de fluide frigorigène représentant le type de fluide frigorigène à utiliser. Les unités de commande intérieures (55) réalisent une commande correspondant au type de fluide frigorigène à utiliser comme indiqué par le signal de type fluide frigorigène reçu à partir de l'unité de commande extérieure (53).
PCT/JP2017/015964 2016-05-20 2017-04-21 Climatiseur et procédé de commande de climatiseur WO2017199683A1 (fr)

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CN201780010518.5A CN108700328A (zh) 2016-05-20 2017-04-21 空调装置以及空调装置的控制方法
EP17799114.8A EP3401612A4 (fr) 2016-05-20 2017-04-21 Climatiseur et procédé de commande de climatiseur

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JP2016-101280 2016-05-20
JP2016101280A JP2017207256A (ja) 2016-05-20 2016-05-20 空気調和装置及び空気調和装置の制御方法

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EP3712533B1 (fr) * 2017-11-16 2023-09-20 Hitachi-Johnson Controls Air Conditioning, Inc. Climatiseur
JP6800187B2 (ja) * 2018-08-31 2020-12-16 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
WO2020217380A1 (fr) * 2019-04-25 2020-10-29 東芝キヤリア株式会社 Unité intérieure de climatiseur et climatiseur
JP6904395B2 (ja) * 2019-09-30 2021-07-14 ダイキン工業株式会社 冷凍装置および熱源ユニット

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See also references of EP3401612A4

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JP2017207256A (ja) 2017-11-24
CN108700328A (zh) 2018-10-23
EP3401612A1 (fr) 2018-11-14
EP3401612A4 (fr) 2019-03-27

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