WO2015083529A1 - Climatiseur - Google Patents

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Publication number
WO2015083529A1
WO2015083529A1 PCT/JP2014/080366 JP2014080366W WO2015083529A1 WO 2015083529 A1 WO2015083529 A1 WO 2015083529A1 JP 2014080366 W JP2014080366 W JP 2014080366W WO 2015083529 A1 WO2015083529 A1 WO 2015083529A1
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WO
WIPO (PCT)
Prior art keywords
air conditioner
valve
emergency stop
liquid
gas
Prior art date
Application number
PCT/JP2014/080366
Other languages
English (en)
Japanese (ja)
Inventor
隆博 加藤
恵介 三苫
崇 濱千代
Original Assignee
三菱重工業株式会社
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 三菱重工業株式会社 filed Critical 三菱重工業株式会社
Priority to EP14867837.8A priority Critical patent/EP3040655A4/fr
Publication of WO2015083529A1 publication Critical patent/WO2015083529A1/fr

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00Compression machines, plants or systems, with reversible cycle
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00Arrangement or mounting of control or safety devices
    • F25B49/005Arrangement or mounting of control or safety devices of safety devices
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/023Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
    • F25B2313/0233Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units in parallel arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/027Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
    • F25B2313/02741Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/13Economisers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00Sensing or detecting of parameters; Sensors therefor
    • F25B2700/19Pressures
    • F25B2700/193Pressures of the compressor
    • F25B2700/1931Discharge pressures
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00Sensing or detecting of parameters; Sensors therefor
    • F25B2700/19Pressures
    • F25B2700/193Pressures of the compressor
    • F25B2700/1933Suction pressures

Definitions

  • the present invention relates to an air conditioner having a function of stopping the operation of the air conditioner in an emergency such as a disaster or a refrigerant leak.
  • Conventional air conditioners operate immediately after an emergency stop such as a disaster such as an earthquake or fire, or when a refrigerant leaks, based on input signals from external devices or unit built-in devices. Had an emergency stop function to stop.
  • Patent Documents 1 to 3 when an emergency stop situation occurs, an electromagnetic component that is controlled to open and close during the emergency stop in the refrigerant circuit in order to move and store the refrigerant on the indoor unit side toward the outdoor unit side.
  • a valve such as a valve
  • the solenoid valve is controlled to open and close via a control device when an emergency stop situation occurs
  • the present invention has been made in view of such circumstances, and is configured to be able to add an emergency stop control function as an option, an air conditioner having an emergency stop control function, and an air conditioner not equipped
  • An object of the present invention is to provide an air conditioner that can simplify the selection.
  • the air conditioner of the present invention employs the following means. That is, the air conditioner according to the present invention is an air conditioner in which at least one indoor unit is connected to one outdoor unit provided with an outdoor control device via a crossover gas pipe and a crossover liquid pipe.
  • the transition gas pipe and the transition liquid pipe are provided with a gas side stop valve and a liquid side stop valve
  • the liquid side stop valve is closed based on the emergency stop signal, the operation is continued as a cooling cycle, and when the pressure of the low pressure part reaches a set pressure, the gas side stop valve is closed,
  • An emergency stop control function for stopping the operation of the air conditioner and an output terminal for outputting a closing signal to the gas side closing valve and the liquid side closing valve are provided.
  • an air conditioner in which an indoor unit is connected to an outdoor unit via a crossover gas pipe and a crossover liquid pipe, and the outdoor unit side is connected to the crossover gas pipe and the crossover liquid pipe.
  • the transition gas pipe and the transition liquid pipe are provided with a gas side stop valve and a liquid side stop valve.
  • the liquid side stop valve is closed based on the emergency stop signal, the operation is continued as the cooling cycle, and when the pressure of the low pressure part reaches the set pressure, the gas side stop valve is closed,
  • An emergency stop control function for stopping the operation of the air conditioner and an output terminal for outputting a closing signal to the gas side closing valve and the liquid side closing valve are provided.
  • a gas-side shut-off valve and a liquid-side shut-off valve are provided.
  • the gas-side shut-off valve and the liquid-side shut-off valve are electrically connected to the output terminal of the outdoor control device, and the gas-side shut-off valve and the liquid-side shut-off valve are connected via the outdoor control device.
  • the valve closable it can be installed as an air conditioner having an emergency stop control function.
  • the gas side operation valve and the liquid side operation are not provided in the transition gas pipe and the transition liquid pipe without providing the gas side shutoff valve and the liquid side shutoff valve.
  • a connecting gas pipe and a connecting liquid pipe may be connected directly to the valve.
  • the air conditioner of the present invention is the above-described air conditioner, wherein the air conditioner is a multi-type air conditioner in which a plurality of the indoor units are connected in parallel to the transition gas pipe and the transition liquid pipe.
  • the receiver is provided in the refrigerant circuit on the outdoor unit side.
  • the air conditioner is a multi-type air conditioner in which a plurality of indoor units are connected in parallel to a transition gas pipe and a transition liquid pipe, and a receiver is provided in the refrigerant circuit on the outdoor unit side. It has been configured. For this reason, at the time of emergency stop control, the refrigerant from the plurality of indoor units can be moved to the outdoor unit side, and the refrigerant can be stored in the equipment on the outdoor unit side including the outdoor heat exchanger and the receiver. Therefore, by appropriately setting the receiver capacity, etc., and storing the refrigerant in the cycle on the outdoor unit side, in the event of an emergency stop such as a disaster or a refrigerant leak, the refrigerant flows from each indoor unit into the room. Risk can be reduced.
  • the air conditioner of the present invention in any one of the above-described air conditioners, the outdoor control device, the direct emergency stop function that immediately stops the operation of the air conditioner based on the emergency stop signal, and the emergency After the refrigerant is moved to the outdoor unit side by the emergency stop control based on a stop signal, the emergency stop control function for stopping the operation of the air conditioner is provided, and can be switched to any one of the configurations. Yes.
  • the outdoor control device has a direct emergency stop function that immediately stops the operation of the air conditioner based on the emergency stop signal, and the refrigerant is moved to the outdoor unit side by the emergency stop control based on the emergency stop signal. Thereafter, an emergency stop control function for stopping the operation of the air conditioner is provided, and the function can be switched to either one.
  • the emergency stop function of the air conditioner by the outdoor control device, the immediate emergency stop function that immediately stops the air conditioner by the emergency stop signal, and the emergency that stops the air conditioner after moving the refrigerant to the outdoor unit side For example, a changeover switch or the like can be used for switching to any one of the stop control functions. Therefore, any emergency stop function can be arbitrarily selected and set according to the situation where the air conditioner is installed.
  • the outdoor control device in any one of the above-described air conditioners, can be operated by inputting the emergency stop signal from an external device or a unit built-in device.
  • the outdoor control device is operable by the input of the emergency stop signal from an external device or a unit built-in device, for example, an emergency stop signal from an external device such as a fire alarm or a seismometer
  • the emergency stop function of the outdoor control device can be activated by inputting both emergency stop signals from unit built-in equipment such as a refrigerant leak detector. Therefore, it is possible to achieve the initial purpose by sufficiently functioning in various emergency stop situations and by making the air conditioner stop in an emergency state in a required state.
  • the crossover gas pipe and the crossover liquid connected to the gas side operation valve and the liquid side operation valve on the outdoor unit side are installed in the field.
  • the piping is provided with a gas-side shut-off valve and a liquid-side shut-off valve.
  • the gas-side shut-off valve and the liquid-side shut-off valve are electrically connected to the output terminal of the outdoor control device, and the gas-side shut-off valve and liquid are connected via the outdoor control device.
  • the gas side operation valve and the liquid side operation are not provided without the gas side stop valve and the liquid side stop valve provided in the transition gas pipe and the transition liquid pipe. It is only necessary to connect the gas pipe and the liquid pipe to the valve. For this reason, whether or not to install an outdoor unit incorporating an outdoor control device with an emergency stop control function, and whether to install a gas-side stop valve and a liquid-side stop valve in the transition gas piping and the transition liquid piping during local installation work Thus, it is possible to easily select either an air conditioner having an emergency stop control function or an air conditioner not having an emergency stop control function, and it is possible to eliminate a reduction in production efficiency and complexity of product management.
  • FIG. 1 It is a block diagram of the air conditioner which concerns on one Embodiment of this invention. It is a control flowchart figure at the time of abnormal operation
  • FIG. 1 shows a configuration diagram of an air conditioner according to an embodiment of the present invention
  • FIG. 2 shows a control flowchart diagram during abnormal operation of the air conditioner.
  • the air conditioner 1 a plurality of indoor units 3 ⁇ / b> A and 3 ⁇ / b> B are connected to a single outdoor unit 2 with a crossover gas pipe 4 and a crossover liquid pipe 5 extending from the outdoor unit 2.
  • a multi-type air conditioner 1 connected in parallel via a branching device 6 is shown.
  • the outdoor unit 2 exchanges heat between the inverter-driven compressor 10 that compresses the refrigerant, the oil separator 11 that separates the oil from the refrigerant gas, the four-way switching valve 12 that switches the circulation direction of the refrigerant, and the refrigerant and the outside air.
  • the above-mentioned devices on the outdoor unit 2 side are connected in a known manner via a refrigerant pipe 21 to constitute an outdoor refrigerant circuit 22.
  • the outdoor unit 2 is provided with an oil return circuit 23 for returning the oil separated by the oil separator 11 to the compressor 10 by a predetermined amount, and a high pressure switch 24, a high pressure sensor 25, and a low pressure sensor 26.
  • an outdoor fan (not shown) for ventilating the outside air to the outdoor control device 27 and the outdoor heat exchanger 13 is provided.
  • the crossover gas pipe 4 and the crossover liquid pipe 5 are refrigerant pipes connected to the gas side operation valve 19 and the liquid side operation valve 20 on the outdoor unit 2 side, and are connected to the outdoor unit 2 and to it during installation work on site.
  • the pipe length is set according to the distance between the plurality of indoor units 3A and 3B.
  • An appropriate number of branching devices 6 are provided in the middle of the transition gas pipe 4 and the transition liquid piping 5, and an appropriate number of indoor units 3 ⁇ / b> A and 3 ⁇ / b> B are connected in parallel via the branching device 6. Thereby, one sealed refrigeration cycle (refrigerant circuit) 7 is configured.
  • the indoor units 3 ⁇ / b> A and 3 ⁇ / b> B circulate indoor air to the indoor heat exchanger 28, an indoor heat exchanger 28 that exchanges heat between the indoor air and the refrigerant for indoor air conditioning, an indoor electronic expansion valve (EEVC) 29, and the indoor heat exchanger 28.
  • An indoor fan or the like (not shown) is provided, and is connected to the branching device 6 via indoor branch gas pipes 4A and 4B and branch liquid pipes 5A and 5B.
  • the cooling operation is performed as follows.
  • the high-temperature and high-pressure refrigerant gas compressed and discharged by the compressor 10 is separated from the oil contained in the refrigerant by the oil separator 11. Thereafter, the refrigerant gas is circulated to the outdoor heat exchanger 13 side by the four-way switching valve 12, and heat is exchanged with the outside air blown by the outdoor fan in the outdoor heat exchanger 13 to be condensed and liquefied.
  • This liquid refrigerant passes through the outdoor electronic expansion valve 14 and is temporarily stored in the receiver 15.
  • the liquid refrigerant whose circulation amount has been adjusted by the receiver 15 is partly diverted from the liquid pipe in the course of being circulated through the liquid pipe side via the supercooling heat exchanger 16, and the supercooling electronic expansion valve (EEVSC) 17. Heat exchange is performed with the refrigerant adiabatically expanded in order to provide a degree of supercooling.
  • This liquid refrigerant is guided from the outdoor unit 2 to the liquid pipe 5 through the liquid side operation valve 20. Furthermore, the liquid refrigerant led out to the transition liquid pipe 5 is divided into the branch liquid pipes 5A and 5B of the indoor units 3A and 3B via the branching device 6.
  • the liquid refrigerant divided into the branch liquid pipes 5A and 5B flows into the indoor units 3A and 3B, is adiabatically expanded by the indoor electronic expansion valve (EEVC) 29, and becomes a gas-liquid two-phase flow. 28.
  • EEVC indoor electronic expansion valve
  • the indoor heat exchanger 28 heat is exchanged between the indoor air circulated by the indoor fan and the refrigerant, and the indoor air is cooled and provided for indoor cooling.
  • the refrigerant is vaporized, reaches the branching device 6 through the branch gas pipes 4A and 4B, and is merged with the refrigerant gas from the other indoor units through the crossover gas pipe 4.
  • the refrigerant gas merged in the transition gas pipe 4 returns to the outdoor unit 2 side again, passes through the gas side operation valve 19 and the four-way switching valve 12, and merges with the refrigerant gas from the supercooling heat exchanger 16, and then the accumulator. 18 is introduced.
  • the accumulator 18 the liquid component contained in the refrigerant gas is separated, and only the gas component is sucked into the compressor 10. This refrigerant is compressed again in the compressor 10, 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 and discharged by the compressor 10 is separated into the gas-side operation valve 19 via the four-way switching valve 12 after the oil contained in the refrigerant is separated by the oil separator 11. Circulated.
  • the refrigerant circulated to the gas side operation valve 19 side is sent out from the outdoor unit 2 through the transition gas pipe 4, and is further passed through the branching unit 6 and the indoor side branch gas pipes 4A and 4B to a plurality of indoor units 3A and 3B. Led to.
  • the high-temperature and high-pressure refrigerant gas introduced into the indoor units 3A and 3B is heat-exchanged with the indoor air circulated through the indoor fan in the indoor heat exchanger 30, and the indoor air is heated to be used for heating. .
  • the liquid refrigerant condensed and liquefied in the indoor heat exchanger 28 reaches the branching device 6 through the indoor side electronic expansion valve (EEVC) 29 and the branch liquid pipes 5A and 5B, and merges with the liquid refrigerant from other indoor units. After that, it returns to the outdoor unit 2 side through the transition liquid pipe 5.
  • EEVC indoor side electronic expansion valve
  • the refrigerant outlet temperature (hereinafter referred to as heat exchange outlet temperature) or the refrigerant subcooling degree of the indoor heat exchanger 28 functioning as a condenser becomes a target value.
  • the opening degree of the indoor electronic expansion valve (EEVC) 29 is controlled.
  • the refrigerant that has returned to the outdoor unit 2 side reaches the supercooling heat exchanger 16 via the liquid side operation valve 20, and is given supercooling as in the case of cooling, and then flows into the receiver 15 and is temporarily stored. Thus, the circulation amount is adjusted.
  • This liquid refrigerant is supplied to the outdoor electronic expansion valve (EEVH) 14 and subjected to adiabatic expansion, and then flows into the outdoor heat exchanger 13.
  • the outdoor heat exchanger 13 heat is exchanged between the outside air blown through the outdoor fan and the refrigerant, whereby the refrigerant absorbs heat from the outside air and is evaporated and gasified.
  • This refrigerant is introduced from the outdoor heat exchanger 13 through the four-way switching valve 12 and the refrigerant gas from the supercooling heat exchanger 16 and then introduced into the accumulator 18.
  • the liquid component contained in the refrigerant gas is separated, and only the gas component is sucked into the compressor 10 and compressed again by the compressor 10.
  • the heating operation is performed by repeating the above cycle.
  • the outdoor control device 27 that controls the operation of the air conditioner 1 operates the air conditioner 1 when an emergency stop such as a disaster such as an earthquake or a fire or a refrigerant leak occurs.
  • the emergency stop control unit for emergency stop is added.
  • the emergency stop control unit immediately stops the operation of the air conditioner 1 when an emergency stop signal is input from an external device 30 such as a fire alarm or a seismometer, or a unit built-in device 31 such as a refrigerant leak detector.
  • An emergency stop unit 32 and an emergency stop control unit 33 that stops the operation of the air conditioner 1 after moving the refrigerant on the indoor unit 3A, 3B side to the outdoor unit 2 side, either one of which is controlled by the changeover switch 34 Switching setting is possible.
  • the direct emergency stop unit 32 has a function of immediately stopping the operation of the air conditioner 1 when an emergency stop signal is input from the external device 30 or the unit built-in device 31.
  • the emergency stop control unit 33 performs the operation of the air conditioner 1 after performing a so-called pump-down operation in which the refrigerant on the indoor unit 3A, 3B side is pumped and moved to the outdoor unit 2 side as shown in FIG. It has a function to stop. Below, the function of this emergency stop control part 33 is demonstrated in detail based on FIG.
  • step S2 when an emergency stop signal is input from the external device 30 or the unit built-in device 31 in step S1, the process proceeds to step S2 to close the liquid side shut-off valve 35. Thereafter, the process proceeds to step S3, where it is determined whether or not the cooling operation is being performed. If the cooling operation is being performed, the refrigeration cycle 7 is maintained in the cooling cycle and the process proceeds to step S4. If the heating operation is being performed, step S5 is performed. After shifting to step S4 and switching the heating cycle to the cooling cycle, the process proceeds to step S4. In step S4, the operation is continued with the drive frequency of the compressor 10 as the set frequency.
  • the refrigerant on the indoor units 3A, 3B side is pumped up into the equipment such as the outdoor heat exchanger 13 and the receiver 15 on the outdoor unit 2 side, or refrigerant piping.
  • the low pressure is monitored by the low pressure sensor 26 in step S6, and when the detected value of the low pressure sensor 26 falls below the set pressure due to the pumping of the refrigerant to the outdoor unit 2 side, the process proceeds to step S7.
  • the compressor 10 is stopped and the operation
  • the liquid side shut-off valve 35 and the gas side shut-off valve 36 which are closed by the emergency stop control unit 33 at the time of emergency stop are respectively electromagnetic valves, and as shown in FIG. 1, the outdoor refrigerant circuit 22 of the outdoor unit 2 as shown in FIG. In the vicinity of the gas-side operation valve 19 and the liquid-side operation valve 20 provided in the gas-side operation valve 19, the connection gas pipe 4 and the connection liquid pipe 5 are installed.
  • the liquid side shut-off valve 35 and the gas side shut-off valve 36 are connected and installed to the transition gas pipe 4 and the transition liquid pipe 5 during the field installation of the air conditioner 1, and are connected to the signal output terminal 37 of the outdoor control device 27. By being electrically connected, at the time of an emergency stop, as described above, it is closed by a closing signal from the emergency stop control unit 33.
  • the following operational effects can be obtained.
  • an emergency stop such as an earthquake or a fire occurs or a refrigerant leak occurs
  • an external device 30 such as a fire alarm or a seismometer, or refrigerant leak detection
  • the outdoor control device 27 sets the stop method when the air conditioner 1 is emergency stopped to any one of the following (1) and (2) using the changeover switch 34 Switching can be set.
  • the direct emergency stop unit 32 is selected and set, and when an emergency stop signal is input, the operation of the air conditioner 1 is immediately stopped.
  • the emergency stop control unit 33 is selected and set and an emergency stop signal is input, after performing a so-called pump-down operation in which the refrigerant on the indoor unit 3A, 3B side is pumped and moved to the outdoor unit 2 side, the air The operation of the harmony machine 1 is stopped.
  • the liquid-side shut-off valve 35 is first closed by an emergency stop signal, and if the cooling operation is being performed, the cooling cycle is maintained and the heating operation is performed. If it is medium, the heating cycle is switched to the cooling cycle and the operation is continued. With this pump-down operation, the refrigerant on the indoor units 3A, 3B side is pumped up to the outdoor unit 2 side, and is stored in equipment such as the outdoor heat exchanger 13 and the receiver 15 and refrigerant piping. When the detection value of the low-pressure sensor 26 drops below the set pressure due to the refrigerant pumping movement, the gas-side stop valve 36 is closed and the operation of the air conditioner 1 is stopped.
  • the refrigerant filled in the refrigeration cycle 7 of the air conditioner 1 is pumped to the outdoor unit 2 side, and the air conditioner 1 is stopped in a state where it is stored. This makes it possible to prevent the refrigerant from flowing out of the indoor units 3A and 3B into the room even when an emergency stop situation occurs.
  • the emergency stop control function that stops the refrigerant on the indoor units 3A, 3B side as being moved to the outdoor unit 2 side is provided. Append. For this reason, the liquid side shutoff valve 35 and the gas side shutoff valve 36 are moved in the vicinity of the gas side operation valve 19 and the liquid side operation valve 20 to which the crossover gas pipe 4 and the crossover liquid pipe 5 on the outdoor unit 2 side are connected. The gas pipe 4 and the transition liquid pipe 5 are installed.
  • liquid side shut-off valve 35 and the gas side shut-off valve 36 are electrically connected to the signal output terminal 37 of the outdoor control device 27, at the time of emergency stop, as described above, by the close signal from the emergency stop control unit 33.
  • the liquid side closing valve 35 and the gas side closing valve 36 can be closed.
  • the liquid side shut-off valve 35 and the gas side are optionally placed at the above positions of the crossover gas pipe 4 and the crossover liquid pipe 5 in the local installation work.
  • a stop valve 36 is provided to connect the transition gas pipe 4 and the transition liquid pipe 5 to the gas side operation valve 19 and the liquid side operation valve 20, and signals from the liquid side stop valve 35, the gas side stop valve 36 and the outdoor control device 27. What is necessary is just to electrically connect between the output terminals 37.
  • the liquid side shut-off valve 35 and the gas side valve are connected to the gas side operation valve 19 and the liquid side operation valve 20 of the outdoor unit 2 that shares the outdoor control device 27. What is necessary is just to connect and install the transition gas piping 4 and the transition liquid piping 5 which are not providing the shut-off valve 36.
  • the outdoor unit 2 incorporating the outdoor control device 27 with the emergency stop control function is shared, and the gas side closure is performed on the transition gas pipe 4 and the transition liquid pipe 5 in the field installation work.
  • the valve 36 and the liquid side shut-off valve 35 are provided, either the air conditioner 1 having an emergency stop control function or the air conditioner 1 not having the emergency stop control function can be easily selected. Product management complexity can be eliminated.
  • the air conditioner 1 is a multi-type air conditioner in which a plurality of indoor units 3A and 3B are connected in parallel to the crossover gas pipe 4 and the crossover liquid pipe 5, and a receiver is provided in the refrigerant circuit 22 on the outdoor unit 2 side. 15 is provided. For this reason, at the time of emergency stop control, the refrigerant from the plurality of indoor units 3A, 3B is moved to the outdoor unit 2 side, and the refrigerant is stored in the equipment on the outdoor unit 2 side including the outdoor heat exchanger 13 and the receiver 15. be able to.
  • the indoor units 3A and 3B can be moved from the indoor units 3A and 3B when an emergency stop occurs such as a disaster or a refrigerant leak. It is possible to prevent the refrigerant from flowing out.
  • the outdoor control device 27 has a direct emergency stop function for immediately stopping the operation of the air conditioner 1 based on the emergency stop signal, and the outdoor unit by the emergency stop control based on the emergency stop signal. After moving to the second side, an emergency stop control function for stopping the operation of the air conditioner 1 is provided.
  • the emergency stop function of the air conditioner 1 by the outdoor control device 27, the direct emergency stop function that immediately stops the air conditioner 1 by the emergency stop signal, and the air conditioner after moving the refrigerant to the outdoor unit 2 side. 1 can be easily switched to and set to any one of the emergency stop control functions for stopping 1, so that any emergency stop function can be set depending on the situation where the air conditioner 1 is installed. It is possible to select and set arbitrarily.
  • the outdoor control device 27 is operable by an emergency stop signal input from an external device 30 such as a fire alarm or a seismometer or a unit built-in device 31 such as a refrigerant leak detector.
  • an emergency stop signal input from an external device 30 such as a fire alarm or a seismometer or a unit built-in device 31 such as a refrigerant leak detector.
  • the emergency stop function of the outdoor control device 27 is activated by inputting both an emergency stop signal from an external device 30 such as a fire alarm or a seismometer or an emergency stop signal from a unit built-in device 31 such as a refrigerant leak detector.
  • the initial purpose can be achieved by sufficiently exhibiting the function for various emergency stop situations and by causing the air conditioner 1 to stop in an emergency state in a required state.
  • this invention is not limited to the invention concerning the said embodiment, In the range which does not deviate from the summary, it can change suitably.
  • the present invention in the above-described embodiment, an example in which the present invention is applied to the multi-type air conditioner 1 has been described. Needless to say, the present invention can be similarly applied to a single-type air conditioner to which one indoor unit is connected.

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

Abstract

L'invention concerne un climatiseur comportant au moins une unité intérieure (3A, 3B) reliée à une unité extérieure (2) par l'intermédiaire d'une tuyauterie de gaz de croisement (4) et d'une tuyauterie de liquide de croisement (5), et une valve d'arrêt côté gaz (36) et une valve d'arrêt côté liquide (35) sont ménagées dans la tuyauterie de gaz de croisement (4) et la tuyauterie de liquide de croisement (5) au voisinage d'une valve de fonctionnement côté gaz (19) et d'une valve de fonctionnement côté liquide (20) ménagées dans un circuit de liquide de refroidissement (22) sur le côté de l'unité extérieure (2). Un dispositif de commande extérieur (27) est équipé de : une fonction de commande d'arrêt d'urgence pour fermer la valve d'arrêt côté liquide (35) sur base d'un signal d'arrêt d'urgence, faisant en sorte que le fonctionnement continue en tant que cycle de refroidissement et, lorsqu'une pression de basse pression atteint une pression de consigne, fermant la valve d'arrêt côté gaz (36) et arrêtant le fonctionnement du climatiseur (1) ; et une borne de sortie (37) pour sortir un signal d'arrêt vers la valve d'arrêt côté gaz (36) et la valve d'arrêt côté liquide (35).
PCT/JP2014/080366 2013-12-02 2014-11-17 Climatiseur WO2015083529A1 (fr)

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JP2013-249294 2013-12-02
JP2013249294A JP6407522B2 (ja) 2013-12-02 2013-12-02 空気調和機

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WO2019130489A1 (fr) * 2017-12-27 2019-07-04 三菱電機株式会社 Dispositif de gestion de climatiseurs
CN110494703A (zh) * 2017-03-31 2019-11-22 大金工业株式会社 空调装置

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CN109863353B (zh) 2016-10-25 2021-09-14 三菱电机株式会社 制冷循环装置
EP3598037B1 (fr) * 2017-03-13 2024-02-21 Mitsubishi Electric Corporation Dispositif à cycle de réfrigération
US11248829B2 (en) 2017-06-09 2022-02-15 Mitsubishi Electric Corporation Apparatus using a heat pump including a refrigerant leakage detector
CN114777218B (zh) * 2022-03-28 2023-12-22 广东开利暖通空调股份有限公司 多联机系统及控制方法

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JP2015105813A (ja) 2015-06-08
JP6407522B2 (ja) 2018-10-17
EP3040655A1 (fr) 2016-07-06
EP3040655A4 (fr) 2016-11-30

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