WO2017199808A1 - Dispositif à cycle frigorifique - Google Patents

Dispositif à cycle frigorifique Download PDF

Info

Publication number
WO2017199808A1
WO2017199808A1 PCT/JP2017/017661 JP2017017661W WO2017199808A1 WO 2017199808 A1 WO2017199808 A1 WO 2017199808A1 JP 2017017661 W JP2017017661 W JP 2017017661W WO 2017199808 A1 WO2017199808 A1 WO 2017199808A1
Authority
WO
WIPO (PCT)
Prior art keywords
refrigerant
refrigeration cycle
indoor
control unit
unit
Prior art date
Application number
PCT/JP2017/017661
Other languages
English (en)
Japanese (ja)
Inventor
将広 上條
康巨 鈴木
昌彦 高木
健裕 田中
和樹 渡部
Original Assignee
三菱電機株式会社
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 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to US16/082,988 priority Critical patent/US20190072291A1/en
Priority to EP17799233.6A priority patent/EP3460360A4/fr
Priority to CN201780028510.1A priority patent/CN109154464A/zh
Priority to JP2018518238A priority patent/JPWO2017199808A1/ja
Publication of WO2017199808A1 publication Critical patent/WO2017199808A1/fr

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • 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
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/52—Indication arrangements, e.g. displays
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • 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
    • F25B49/005—Arrangement or mounting of control or safety devices of safety devices
    • 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
    • F24F11/89—Arrangement or mounting of control or safety devices
    • 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
    • F25B13/00—Compression machines, plants or systems, with 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
    • F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
    • 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/031—Sensor arrangements
    • F25B2313/0314—Temperature sensors near the indoor heat exchanger
    • 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/031—Sensor arrangements
    • F25B2313/0315—Temperature sensors near the outdoor heat exchanger
    • 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves

Definitions

  • the present invention relates to a refrigeration cycle apparatus having a refrigerant detection function.
  • Patent Document 1 describes an air conditioner using a flammable refrigerant, which includes a gas sensor for detecting a flammable refrigerant gas on the outer surface of an indoor unit.
  • the indoor unit is a floor type, and the gas sensor is provided at the lower part of the indoor unit. If the sensor detection voltage of the gas sensor is equal to or higher than a reference value, the control unit of this air conditioner determines that the flammable refrigerant has leaked, immediately issues an alarm by an alarm device, and turns on the fan installed in the indoor unit. Rotate. Thereby, the user can know that the flammable refrigerant has leaked, and can take measures such as a procedure for ventilating the room and calling a service person for repair.
  • the processing performed first by a service person who has received a refrigerant leak notification and arrived at the site varies depending on the presence or absence of refrigerant in the refrigerant circuit. If the refrigerant in the refrigerant pipe remains, the service person will connect the extension pipe of the outdoor unit so that no more refrigerant will leak from the leaked part of the indoor unit before checking and repairing the leaked part. It is necessary to take measures such as closing the valve. On the other hand, when there is no refrigerant in the refrigerant pipe, the service person can immediately check the leak location and start a series of operations for repairing the found leak location.
  • the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a refrigeration cycle apparatus that enables rapid processing thereafter when refrigerant leakage occurs.
  • the refrigeration cycle apparatus includes a load-side heat exchanger that constitutes a refrigeration cycle in which refrigerant circulates, a refrigerant detection means that detects the refrigerant, and a blower fan, and an indoor unit that is installed indoors.
  • a control unit that controls the indoor unit, a notification unit that reports information related to the refrigerant, and a timer that measures time, and when the refrigerant is detected by the refrigerant detection unit, the control unit
  • the notification means is configured to notify information related to the time measured by the timer as countermeasure information for determining a countermeasure procedure for refrigerant leakage.
  • the countermeasure information for determining the countermeasure procedure for the refrigerant leakage is notified. Therefore, the service person corresponding to the refrigerant leakage can quickly start an appropriate initial movement process.
  • FIG. 1 is a refrigerant circuit diagram illustrating a schematic configuration of an air conditioner according to an embodiment of the present invention.
  • the dimensional relationship and shape of each component may differ from the actual ones.
  • the air conditioner 100 has a refrigerant circuit 40 for circulating the refrigerant.
  • the refrigerant circuit 40 includes a compressor 3, a refrigerant flow switching device 4, a heat source side heat exchanger 5 (for example, an outdoor heat exchanger), a decompression device 6, and a load side heat exchanger 7 (for example, an indoor heat exchanger).
  • the air conditioner 100 has the outdoor unit 2 installed, for example, outdoors as a heat source unit.
  • the air conditioner 100 has, for example, an indoor unit 1 installed indoors as a load unit.
  • the indoor unit 1 and the outdoor unit 2 are connected via extension pipes 10a and 10b that are part of the refrigerant pipe.
  • a slightly flammable refrigerant such as HFO-1234yf or HFO-1234ze, or a strong flammable refrigerant such as R290 or R1270 is used.
  • These refrigerants may be used as a single refrigerant, or may be used as a mixed refrigerant in which two or more kinds are mixed.
  • a refrigerant having a flammability at or above a slight combustion level (for example, 2 L or more in the ASHRAE 34 classification) may be referred to as a “flammable refrigerant”.
  • non-flammable refrigerants such as R22 and R410A having nonflammability (for example, 1 in the ASHRAE 34 classification) can be used. These refrigerants have, for example, higher density than air under atmospheric pressure.
  • the compressor 3 is a fluid machine that compresses sucked low-pressure refrigerant and discharges it as high-pressure refrigerant.
  • the refrigerant flow switching device 4 switches the flow direction of the refrigerant in the refrigerant circuit 40 between the cooling operation and the heating operation.
  • a four-way valve is used as the refrigerant flow switching device 4.
  • the heat source side heat exchanger 5 is a heat exchanger that functions as a radiator (for example, a condenser) during cooling operation and functions as an evaporator during heating operation. In the heat source side heat exchanger 5, heat exchange is performed between the refrigerant circulating in the interior and the outdoor air blown by an outdoor blower fan 5f described later.
  • the decompression device 6 decompresses the high-pressure refrigerant into a low-pressure refrigerant.
  • an electronic expansion valve whose opening degree can be adjusted is used.
  • the load-side heat exchanger 7 is a heat exchanger that functions as an evaporator during cooling operation and functions as a radiator (for example, a condenser) during heating operation. In the load-side heat exchanger 7, heat exchange is performed between the refrigerant circulating in the interior and air blown by an indoor blower fan 7f described later.
  • the cooling operation is an operation for supplying a low-temperature and low-pressure refrigerant to the load-side heat exchanger 7
  • the heating operation is an operation for supplying a high-temperature and high-pressure refrigerant to the load-side heat exchanger 7. It is.
  • a compressor 3, a refrigerant flow switching device 4, a heat source side heat exchanger 5 and a pressure reducing device 6 are accommodated.
  • the outdoor unit 2 accommodates an outdoor blower fan 5 f that supplies outdoor air to the heat source side heat exchanger 5.
  • the outdoor fan 5f is installed to face the heat source side heat exchanger 5. By rotating the outdoor fan 5f, an air flow passing through the heat source side heat exchanger 5 is generated.
  • a propeller fan is used as the outdoor blower fan 5f.
  • the outdoor fan 5f is arranged, for example, on the downstream side of the heat source side heat exchanger 5 in the air flow generated by the outdoor fan 5f.
  • the outdoor unit 2 includes a refrigerant pipe connecting the extension pipe connection valve 13a on the gas side during the cooling operation and the refrigerant flow switching device 4 as a refrigerant pipe, a suction pipe 11 connected to the suction side of the compressor 3, A discharge pipe 12 connected to the discharge side of the compressor 3, a refrigerant pipe connecting the refrigerant flow switching device 4 and the heat source side heat exchanger 5, a refrigerant pipe connecting the heat source side heat exchanger 5 and the decompression device 6, And the refrigerant
  • the extension pipe connection valve 13a is a two-way valve that can be switched between open and closed, and a flare joint is attached to one end thereof.
  • the extension pipe connection valve 13b is a three-way valve that can be switched between open and closed.
  • a service port 14a used for evacuation which is a pre-operation for filling the refrigerant into the refrigerant circuit 40, is attached, and a flare joint is attached to the other end.
  • the high-temperature and high-pressure gas refrigerant compressed by the compressor 3 flows through the discharge pipe 12 during both the cooling operation and the heating operation.
  • a low-temperature and low-pressure gas refrigerant or two-phase refrigerant that has undergone an evaporating action flows through the suction pipe 11 in both the cooling operation and the heating operation.
  • a service port 14b with a low-pressure side flare joint is connected to the suction pipe 11, and a service port 14c with a flare joint on the high-pressure side is connected to the discharge pipe 12.
  • the service ports 14b and 14c are used for measuring the operating pressure by connecting a pressure gauge at the time of installation or repair of the air conditioner 100.
  • the indoor unit 1 accommodates a load side heat exchanger 7. Further, the indoor unit 1 is provided with an indoor fan 7f that supplies air to the load-side heat exchanger 7. By rotating the indoor blower fan 7f, an air flow passing through the load-side heat exchanger 7 is generated.
  • a centrifugal fan for example, a sirocco fan, a turbo fan, etc.
  • a cross flow fan for example, a diagonal fan
  • an axial fan for example, a propeller fan
  • the indoor blower fan 7f of this example is disposed on the upstream side of the load side heat exchanger 7 in the air flow generated by the indoor blower fan 7f, but is disposed on the downstream side of the load side heat exchanger 7. Also good.
  • a joint portion 15a for example, a flare joint for connecting the extension piping 10a is provided at a connection portion with the extension piping 10a on the gas side.
  • a joint part 15b for example, a flare joint for connecting the extension pipe 10b is provided in the connection part with the liquid side extension pipe 10b. It has been.
  • the indoor unit 1 includes the intake air temperature sensor 91 that detects the temperature of the indoor air sucked from the room, and the refrigerant temperature at the inlet portion during the cooling operation of the load side heat exchanger 7 (the outlet portion during the heating operation).
  • a heat exchanger inlet temperature sensor 92 to detect, a heat exchanger temperature sensor 93 to detect the refrigerant temperature (evaporation temperature or condensation temperature) of the two-phase part of the load side heat exchanger 7 are provided.
  • the indoor unit 1 is provided with a refrigerant detection means 99 (for example, a semiconductor gas sensor) described later. These sensors are configured to output detection signals to the control unit 30 that controls the indoor unit 1 or the air conditioner 100 as a whole.
  • the control unit 30 is a microcomputer having a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Randam Access Memory), an I / O (Input / Output) port, etc. There is.)
  • the control unit 30 can perform data communication with the operation unit of the remote controller described later.
  • the operation unit accepts an operation by the user and outputs an operation signal based on the operation to the control unit 30.
  • the control unit 30 controls the entire operation of the indoor unit 1 or the air conditioner 100 including the operation of the indoor blower fan 7f based on the operation signal from the operation unit, the detection signal from the sensors, and the like.
  • control unit 30 of the present embodiment can switch between energization and non-energization of the refrigerant detection means 99.
  • the control unit 30 may be provided in the housing of the indoor unit 1 or may be provided in the housing of the outdoor unit 2.
  • control part 30 may be comprised by the outdoor unit control part provided in the outdoor unit 2, and the indoor unit control part provided in the indoor unit 1 and capable of data communication with the outdoor unit control part.
  • a solid line arrow indicates the flow direction of the refrigerant during the cooling operation.
  • the refrigerant flow path switching device 4 switches the refrigerant flow path as indicated by a solid line, and the refrigerant circuit 40 is configured so that the low-temperature and low-pressure refrigerant flows through the load-side heat exchanger 7.
  • the high-temperature and high-pressure gas refrigerant discharged from the compressor 3 first flows into the heat source side heat exchanger 5 through the refrigerant flow switching device 4.
  • the heat source side heat exchanger 5 functions as a condenser. That is, in the heat source side heat exchanger 5, heat exchange is performed between the refrigerant circulating in the interior and the outdoor air blown by the outdoor blower fan 5f, and the condensation heat of the refrigerant is radiated to the outdoor air. Thereby, the refrigerant flowing into the heat source side heat exchanger 5 is condensed and becomes a high-pressure liquid refrigerant.
  • the high-pressure liquid refrigerant flows into the decompression device 6 and is decompressed to become a low-pressure two-phase refrigerant.
  • the low-pressure two-phase refrigerant flows into the load side heat exchanger 7 of the indoor unit 1 via the extension pipe 10b.
  • the load side heat exchanger 7 functions as an evaporator. That is, in the load-side heat exchanger 7, heat exchange is performed between the refrigerant circulating inside and the air (for example, indoor air) blown by the indoor blower fan 7f, and the evaporation heat of the refrigerant is absorbed from the blown air.
  • the refrigerant flowing into the load-side heat exchanger 7 evaporates to become a low-pressure gas refrigerant or a two-phase refrigerant. Further, the air blown by the indoor blower fan 7f is cooled by the endothermic action of the refrigerant.
  • the low-pressure gas refrigerant or two-phase refrigerant evaporated in the load side heat exchanger 7 is sucked into the compressor 3 via the extension pipe 10 a and the refrigerant flow switching device 4.
  • the refrigerant sucked into the compressor 3 is compressed into a high-temperature and high-pressure gas refrigerant. In the cooling operation, the above cycle is repeated.
  • the refrigerant flow path switching device 4 switches the refrigerant flow paths as indicated by dotted lines, and the refrigerant circuit 40 is configured so that the high-temperature and high-pressure refrigerant flows through the load-side heat exchanger 7.
  • the refrigerant flows in the opposite direction to that during the cooling operation, and the load side heat exchanger 7 functions as a condenser.
  • FIG. 2 is a front view showing an appearance of the indoor unit of the air conditioner according to the embodiment of the present invention.
  • FIG. 3 is a front view schematically showing the internal structure of the indoor unit of the air conditioner according to the embodiment of the present invention.
  • FIG. 4 is a side view schematically showing the internal structure of the indoor unit of the air conditioner according to the embodiment of the present invention.
  • the left side in FIG. 4 shows the front side of the indoor unit 1 (that is, the indoor space side).
  • the indoor unit 1 is exemplified by a floor-standing indoor unit 1 installed on the floor surface of the indoor space serving as the air-conditioning target space.
  • the positional relationship (for example, vertical relationship etc.) between each structural member in the following description is a thing when installing the indoor unit 1 in the state which can be used in principle.
  • the indoor unit 1 includes a casing 111 having a vertically long rectangular parallelepiped shape.
  • a suction port 112 for sucking air in the indoor space is formed in the lower front portion of the housing 111.
  • the suction port 112 of the present embodiment is provided below the center part in the vertical direction of the casing 111 and at a position near the floor surface.
  • the air sucked from the suction port 112 is blown out into the room.
  • An outlet 113 is formed.
  • the housing 111 is a hollow box, and a front opening is formed on the front surface of the housing 111.
  • the casing 111 includes a first front panel 114a, a second front panel 114b, and a third front panel 114c that are detachably attached to the front opening.
  • the first front panel 114a, the second front panel 114b, and the third front panel 114c all have a substantially rectangular flat plate-like outer shape.
  • the first front panel 114a is detachably attached to the lower portion of the front opening of the casing 111.
  • the suction port 112 is formed in the first front panel 114a.
  • the second front panel 114b is disposed adjacent to and above the first front panel 114a, and is detachably attached to the central portion of the front opening of the housing 111 in the vertical direction.
  • the operation unit is provided on the second front panel 114b.
  • the third front panel 114c is disposed adjacent to and above the second front panel 114b, and is detachably attached to the upper portion of the front opening of the housing 111.
  • the above-described air outlet 113 is formed in the third front panel 114c.
  • the internal space of the housing 111 is roughly divided into a space 115a serving as a blower section and a space 115b positioned above the space 115a and serving as a heat exchange section.
  • the space 115a and the space 115b are partitioned by the partition portion 20.
  • the partition part 20 has a flat plate shape, for example, and is arranged substantially horizontally.
  • the partition portion 20 is formed with at least an air passage opening 20a serving as an air passage between the space 115a and the space 115b.
  • the space 115a is exposed to the front side by removing the first front panel 114a from the housing 111, and the space 115b is obtained by removing the second front panel 114b and the third front panel 114c from the housing 111. Is exposed on the front side.
  • the height at which the partition portion 20 is installed generally matches the height of the upper end of the first front panel 114a or the lower end of the second front panel 114b.
  • the partition portion 20 may be formed integrally with a fan casing 108 described later, or may be formed integrally with a drain pan described later, or as a separate body from the fan casing 108 and the drain pan. It may be formed.
  • an indoor blower fan 7f that causes an air flow from the inlet 112 to the outlet 113 to be generated in the air passage 81 in the housing 111 is disposed.
  • the indoor blower fan 7f of the present embodiment is a sirocco fan that includes a motor (not shown) and an impeller 107 that is connected to an output shaft of the motor and has a plurality of blades arranged at equal intervals in the circumferential direction, for example. is there.
  • the rotating shaft of the impeller 107 is disposed so as to be substantially parallel to the depth direction of the casing 111.
  • the rotational speed of the indoor blower fan 7f is set to be variable in multiple stages (for example, two or more stages) or continuously by control of the control unit 30 based on the set air volume set by the user.
  • the impeller 107 of the indoor fan 7f is covered with a spiral fan casing 108.
  • the fan casing 108 is formed separately from the casing 111, for example.
  • a suction opening 108 b that sucks room air into the fan casing 108 through the suction port 112 is formed.
  • the suction opening 108 b is disposed so as to face the suction port 112.
  • a blowout opening 108a for blowing out the blown air is formed.
  • the blowout opening 108 a is disposed so as to face upward, and is connected to the space 115 b through the air passage opening 20 a of the partition part 20.
  • an electrical component box 25 in which a microcomputer, various electrical components, a substrate, and the like constituting the control unit 30 are accommodated is provided.
  • the load side heat exchanger 7 is arranged in the air passage 81 in the space 115b.
  • a drain pan (not shown) that receives condensed water condensed on the surface of the load side heat exchanger 7 is provided below the load side heat exchanger 7.
  • the drain pan may be formed as a part of the partition part 20, or may be formed separately from the partition part 20 and disposed on the partition part 20.
  • a refrigerant detection means 99 is provided at a position near the lower side of the space 115a.
  • an energization type refrigerant detection means including an energization type gas sensor such as a semiconductor gas sensor or a hot wire type semiconductor gas sensor is used.
  • the refrigerant detection unit 99 detects, for example, the refrigerant concentration in the air around the refrigerant detection unit 99 and outputs a detection signal to the control unit 30. In the control unit 30, processing related to refrigerant leakage is executed based on the detection signal from the refrigerant detection means 99.
  • the refrigerant detection means 99 of the present embodiment is provided in a position lower in the casing 111 than the load-side heat exchanger 7 and the joint portions 15a and 15b. Thereby, at least when the indoor blower fan 7f is stopped, the refrigerant detection means 99 can reliably detect the leaked refrigerant.
  • the refrigerant detection means 99 is provided at a position closer to the lower side of the space 115a, but the installation position of the refrigerant detection means 99 may be another position.
  • the display unit 26a of the remote control 26 includes a status display area 261, an abnormal code display area 262, a current time display area 263, and a handling information display area 264 in which information for determining a handling procedure for refrigerant leakage is displayed.
  • a character string indicating the refrigerant leakage is displayed in the state display area 261.
  • FIG. 5 shows a state in which the characters “Rayby Law” are displayed as an example.
  • the abnormality code display area 262 when an abnormality occurs in the air conditioner 100, a predetermined code corresponding to the abnormality content is displayed. In FIG. 5, a two-digit code is displayed as an example.
  • This code is described in a manual or the like used by a service person in charge of maintenance and repair of the air conditioner 100.
  • the service person can manually check the code displayed in the abnormal code display area 262. It is possible to check what kind of abnormality has occurred in the air conditioner 100 and determine how to deal with it. For example, as shown in FIG. 5, in a situation where a character string indicating refrigerant leakage is displayed in the state display area 261, a code indicating refrigerant leakage is displayed in the abnormal code display area 262. That is, the same information is displayed in the status display area 261 and the abnormal code display area 262.
  • FIG. 6 is a control block diagram of the indoor unit of the air conditioner according to the embodiment of the present invention.
  • Information corresponding to the operation content of the operation unit 26 b of the remote control 26 by the user and the detection result by the refrigerant detection means 99 are input to the control unit 30.
  • the control signal which controls the display part 26a of the remote control 26 and the indoor ventilation fan 7f is output.
  • the elapsed time measured by the timer 101 is input to the control unit 30.
  • the elapsed time is displayed in the countermeasure information display area 264 of the display unit 26 a of the remote control 26 under the control of the control unit 30.
  • This timer 101 may be built in the control unit 30 or may be built in the remote control 26.
  • FIG. 7 is a flowchart showing an example of the refrigerant leakage detection process executed by the control unit 30 of the air conditioner 100 according to the present embodiment.
  • the refrigerant leakage detection process is repeatedly executed at predetermined time intervals at all times including during operation and stop of the air conditioner 100 or only when the air conditioner 100 is stopped.
  • the control unit 30 acquires information on the refrigerant concentration around the refrigerant detection means 99 based on the detection signal from the refrigerant detection means 99.
  • step S2 the control unit 30 checks whether or not the refrigerant concentration around the refrigerant detection means 99 is equal to or higher than a preset threshold value. If it is confirmed that the refrigerant concentration around the refrigerant detection means 99 is equal to or higher than the threshold value, the process proceeds to step S3. For example, when the refrigerant sealed in the refrigerant circuit 40 is flammable, the threshold is set to a quarter of the lower combustion limit LFL (Lower Flammable Limit).
  • LFL Lower Flammable Limit
  • step S3 when the indoor blower fan 7f is stopped, the control unit 30 starts the operation of the indoor blower fan 7f.
  • the indoor fan 7f is already in operation, the operation is continued as it is. That is, in order to prevent an air concentration that is not suitable as a work environment due to leakage of the refrigerant, the control unit 30 forces the indoor fan 7f to be in an operating state. Further, when the leaking refrigerant is a flammable refrigerant, the control unit 30 forcibly puts the indoor blower fan 7f into an operating state in order to prevent the refrigerant concentration from reaching the flammable concentration range.
  • step S4 the control unit 30 starts the timer 101 and starts measuring elapsed time.
  • the control unit 30 displays a character string informing that the refrigerant is leaking in the state display area 261 of the display unit 26a of the remote control 26.
  • the control unit 30 displays an abnormal code for refrigerant leakage in the abnormal code display area 262.
  • the control unit 30 displays the elapsed time acquired from the timer 101 in the handling information display area 264.
  • the user who has confirmed that the character string indicating the refrigerant leakage is displayed in the status display area 261 indicates the code displayed in the abnormal code display area 262 and the elapsed time displayed in the countermeasure information display area 264.
  • the serviceman can accurately determine the state of refrigerant leakage in the air conditioner 100.
  • Information for judging the contents of the abnormal code and the state of refrigerant leakage is described in a manual used by service personnel. For example, the time T until the refrigerant leaks from the brazing part or the joint parts 15a and 15b of the load side heat exchanger 7 and all the refrigerant sealed in the refrigerant circuit 40 leaks is enclosed in the refrigerant circuit 40.
  • the refrigerant amount m, the assumed leakage speed v, the time T described above, and the like are also described in the serviceman's manual. Further, even when the service person is informed only by the user that the refrigerant is leaking, the service person who has arrived at the job site is not limited to the above information and the service person displayed in each display area of the display unit 26a. By confirming the manual used by the air conditioner, it is possible to accurately determine the state of refrigerant leakage in the air conditioner 100. As a result, the service person can quickly perform an appropriate initial response when the refrigerant leaks.
  • the countermeasure information display area 264 displays an elapsed time less than the time T.
  • a serviceman who has obtained information on the elapsed time from the user has a possibility that a flammable concentration range may be formed if the refrigerant remains and the leakage continues thereafter, if the refrigerant is flammable. I can understand. Therefore, it can be determined that the user should be instructed to ventilate the room. Further, even if the service person arrives at the site without obtaining such information in advance, the service person himself may check the information displayed on the display unit 26a, so that the refrigerant may remain.
  • the remote control 26 having the display unit 26a for notifying information on refrigerant leakage is provided on the design surface of the casing 111. Therefore, it is possible for a user and a service person to easily visually recognize and acquire information on refrigerant leakage.
  • the indoor unit 1 may include a battery. If the breaker is dropped and the supply of commercial power is stopped, the indoor blower fan 7f stops. However, if the indoor unit 1 is equipped with a battery, even if the supply of commercial power is interrupted, by supplying power from the battery of the indoor unit 1, the operation of the indoor fan 7f and the measurement of elapsed time by the timer 101 are performed. And the display of the information regarding the refrigerant leakage on the display unit 26a can be continuously performed.
  • the timer 101 is started after detecting the leakage of the refrigerant and starting the indoor blower fan 7f.
  • the present invention is not limited to this.
  • the timer 101 may be started, and then the indoor fan 7f may be started to operate.
  • the length of the predetermined time is set so that the discharged refrigerant is not diffused by the indoor blower fan 7f to form a combustible concentration.
  • the elapsed time measured by the timer 101 is displayed in the countermeasure information display area 264 of the display unit 26a of the remote control 26, but the present invention is not limited to this.
  • a remaining time until a predetermined time set in advance as a time until all the refrigerant is discharged, or a remaining time until a predetermined time set so as to stop the indoor fan 7f is displayed. Also good.
  • information related to refrigerant leakage and information for the serviceman to determine the handling procedure at the time of refrigerant leakage are displayed on the display unit 26a of the remote control 26, but the present invention is not limited to this. It may be a display device or a display that is separately connected to the air conditioner 100.
  • the separately connected display device may be, for example, a centralized system controller or a personal computer that can collectively manage a plurality of air conditioners.
  • the display device connected separately may be a segment display 301 that is connected to the air conditioner 100 by a serviceman for checking and confirms the operation state.
  • These system controllers, personal computers, and segment displays may be wirelessly connectable.
  • information regarding refrigerant leakage and information for the serviceman to determine the countermeasure procedure at the time of refrigerant leakage are notified by text display, but the present invention is not limited to this. Such information may be notified by lighting and blinking of the lamp, or may be configured to be notified by voice.
  • the indoor unit 1 of the air conditioner 100 has been described as an example, but the present invention is not limited to this.
  • the outdoor unit 2 may be provided with the above-described display unit 26a.
  • the air conditioner 100 has been described as an example in the present embodiment, the present invention is not limited to this. You may comprise as mentioned above so that the information regarding refrigerant

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

L'invention concerne un dispositif à cycle frigorifique permettant un traitement rapide après une survenue de fuite de fluide frigorigène. Dans le présent dispositif à cycle frigorifique, lorsqu'un fluide frigorigène est détecté par un moyen de détection de fluide frigorigène, un moyen de notification communique des informations dans un temps mesuré par une minuterie en tant qu'informations de contre-mesure destinées à déterminer des méthodes de contre-mesure contre la fuite de fluide frigorigène.
PCT/JP2017/017661 2016-05-17 2017-05-10 Dispositif à cycle frigorifique WO2017199808A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US16/082,988 US20190072291A1 (en) 2016-05-17 2017-05-10 Refrigeration cycle apparatus
EP17799233.6A EP3460360A4 (fr) 2016-05-17 2017-05-10 Dispositif à cycle frigorifique
CN201780028510.1A CN109154464A (zh) 2016-05-17 2017-05-10 制冷循环装置
JP2018518238A JPWO2017199808A1 (ja) 2016-05-17 2017-05-10 冷凍サイクル装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JPPCT/JP2016/064629 2016-05-17
PCT/JP2016/064629 WO2017199342A1 (fr) 2016-05-17 2016-05-17 Dispositif à cycle frigorifique

Publications (1)

Publication Number Publication Date
WO2017199808A1 true WO2017199808A1 (fr) 2017-11-23

Family

ID=58666494

Family Applications (2)

Application Number Title Priority Date Filing Date
PCT/JP2016/064629 WO2017199342A1 (fr) 2016-05-17 2016-05-17 Dispositif à cycle frigorifique
PCT/JP2017/017661 WO2017199808A1 (fr) 2016-05-17 2017-05-10 Dispositif à cycle frigorifique

Family Applications Before (1)

Application Number Title Priority Date Filing Date
PCT/JP2016/064629 WO2017199342A1 (fr) 2016-05-17 2016-05-17 Dispositif à cycle frigorifique

Country Status (5)

Country Link
US (1) US20190072291A1 (fr)
EP (1) EP3460360A4 (fr)
JP (2) JP6121075B1 (fr)
CN (1) CN109154464A (fr)
WO (2) WO2017199342A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3584522A4 (fr) * 2018-05-10 2020-04-29 Mitsubishi Electric Corporation Dispositif de détermination de fuite de fluide frigorigène, climatiseur et procédé de détermination de fuite de fluide frigorigène

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110730891B (zh) * 2017-06-15 2021-10-01 三菱电机株式会社 空调机
JP6869213B2 (ja) * 2018-08-31 2021-05-12 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
US11579601B2 (en) * 2019-01-15 2023-02-14 Pricemy Developer LLC Methods and devices for a building monitoring system
US11959677B2 (en) * 2019-04-09 2024-04-16 Mitsubishi Electric Corporation Refrigeration apparatus having input operation modes
CN110044033A (zh) * 2019-04-29 2019-07-23 广东美的制冷设备有限公司 空调的制冷剂泄漏检测方法、系统及空调
US11408624B2 (en) * 2019-10-15 2022-08-09 Carrier Corporation Refrigerant leak detection
EP3875861B1 (fr) * 2020-03-06 2023-05-17 Daikin Industries, Ltd. Climatiseur, système de climatisation et procédé pour surveillance un climatiseur
WO2021220355A1 (fr) * 2020-04-27 2021-11-04 三菱電機株式会社 Dispositif à cycle de réfrigération
JP7474923B2 (ja) * 2020-06-25 2024-04-26 パナソニックＩｐマネジメント株式会社 空気調和機
US20220252291A1 (en) * 2021-02-05 2022-08-11 Emerson Climate Technologies, Inc. Mitigation State Verification Systems And Methods
JP7260806B2 (ja) * 2021-04-27 2023-04-19 ダイキン工業株式会社 空調システム、その運転制御方法、及び空調システムの運転制御装置

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11230648A (ja) * 1998-02-13 1999-08-27 Matsushita Electric Ind Co Ltd 可燃性冷媒を用いた冷凍機器の冷媒漏洩警報装置
JP2003207261A (ja) * 2002-01-17 2003-07-25 Toshiba Corp 冷蔵庫
JP2010078285A (ja) * 2008-09-29 2010-04-08 Mitsubishi Electric Corp ヒートポンプ給湯機
JP4599699B2 (ja) 2000-09-26 2010-12-15 ダイキン工業株式会社 空気調和機
JP2015094515A (ja) * 2013-11-12 2015-05-18 ダイキン工業株式会社 室内機
JP2015197279A (ja) * 2014-04-03 2015-11-09 ダイキン工業株式会社 コントローラ
JP2016029322A (ja) * 2014-07-15 2016-03-03 三菱電機株式会社 空気調和装置
JP2016065674A (ja) * 2014-09-25 2016-04-28 三菱電機株式会社 ヒートポンプ装置
JP2017053509A (ja) * 2015-09-08 2017-03-16 ジョンソンコントロールズ ヒタチ エア コンディショニング テクノロジー（ホンコン）リミテッド 空気調和システムおよび空気調和システムの警告報知方法

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60157699A (ja) * 1984-01-27 1985-08-17 ホーチキ株式会社 異常状態警報装置
JP3211405B2 (ja) * 1992-10-01 2001-09-25 株式会社日立製作所 冷媒組成検出装置
JP3523381B2 (ja) * 1995-07-26 2004-04-26 株式会社日立製作所 冷蔵庫
JPH11211292A (ja) * 1998-01-26 1999-08-06 Matsushita Electric Ind Co Ltd 冷凍装置の冷媒漏れ検出装置及び冷媒漏れ検出方法
JP2002039649A (ja) * 2000-07-24 2002-02-06 Funai Electric Co Ltd 空気調和機の運転警報装置
WO2003060400A1 (fr) * 2002-01-15 2003-07-24 Kabushiki Kaisha Toshiba Refrigerateur muni d'un systeme d'alerte pour signaler une fuite d'agent refrigerant
US6955198B2 (en) * 2003-09-09 2005-10-18 Advanced Technology Materials, Inc. Auto-switching system for switch-over of gas storage and dispensing vessels in a multi-vessel array
JP4265982B2 (ja) * 2004-02-25 2009-05-20 三菱電機株式会社 機器診断装置、冷凍サイクル装置、冷凍サイクル監視システム
JP5188800B2 (ja) * 2007-12-21 2013-04-24 オリンパスメディカルシステムズ株式会社 内視鏡洗浄消毒装置及びこの内視鏡洗浄消毒装置による漏水検知方法
US7834772B2 (en) * 2008-04-05 2010-11-16 Frederick Robert W Copper-watcher
US8174398B2 (en) * 2009-07-31 2012-05-08 Abraham Wien Leak sensor monitor
CN103322641B (zh) * 2012-03-21 2016-06-01 广东美芝精密制造有限公司 使用可燃性冷媒空调器的安全控制方法
JP2013250038A (ja) * 2012-06-04 2013-12-12 Daikin Industries Ltd 冷凍装置管理システム
KR20140056965A (ko) * 2012-11-02 2014-05-12 엘지전자 주식회사 공기조화기 및 그 제어 방법
JP5818849B2 (ja) * 2013-08-26 2015-11-18 三菱電機株式会社 空気調和装置および冷媒漏洩検知方法
JP2015183978A (ja) * 2014-03-26 2015-10-22 株式会社鷺宮製作所 警報表示装置
CN106537053A (zh) * 2014-06-20 2017-03-22 江森自控日立空调技术（香港）有限公司 显示装置、方法以及程序
JP6252684B2 (ja) * 2014-09-26 2017-12-27 三菱電機株式会社 冷媒漏洩検知装置及びこれを備えた冷凍サイクル装置
US9684312B1 (en) * 2014-11-22 2017-06-20 Orbit Irrigation Products, Inc. Resource consumption measurement system and method
US10408484B2 (en) * 2015-03-31 2019-09-10 Daikin Industries, Ltd. Air-conditioning apparatus with a refrigerant leak sensor in an indoor unit

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11230648A (ja) * 1998-02-13 1999-08-27 Matsushita Electric Ind Co Ltd 可燃性冷媒を用いた冷凍機器の冷媒漏洩警報装置
JP4599699B2 (ja) 2000-09-26 2010-12-15 ダイキン工業株式会社 空気調和機
JP2003207261A (ja) * 2002-01-17 2003-07-25 Toshiba Corp 冷蔵庫
JP2010078285A (ja) * 2008-09-29 2010-04-08 Mitsubishi Electric Corp ヒートポンプ給湯機
JP2015094515A (ja) * 2013-11-12 2015-05-18 ダイキン工業株式会社 室内機
JP2015197279A (ja) * 2014-04-03 2015-11-09 ダイキン工業株式会社 コントローラ
JP2016029322A (ja) * 2014-07-15 2016-03-03 三菱電機株式会社 空気調和装置
JP2016065674A (ja) * 2014-09-25 2016-04-28 三菱電機株式会社 ヒートポンプ装置
JP2017053509A (ja) * 2015-09-08 2017-03-16 ジョンソンコントロールズ ヒタチ エア コンディショニング テクノロジー（ホンコン）リミテッド 空気調和システムおよび空気調和システムの警告報知方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3460360A4 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3584522A4 (fr) * 2018-05-10 2020-04-29 Mitsubishi Electric Corporation Dispositif de détermination de fuite de fluide frigorigène, climatiseur et procédé de détermination de fuite de fluide frigorigène

Also Published As

Publication number Publication date
JP6121075B1 (ja) 2017-04-26
JPWO2017199342A1 (ja) 2018-05-31
US20190072291A1 (en) 2019-03-07
JPWO2017199808A1 (ja) 2018-11-29
EP3460360A4 (fr) 2019-05-08
WO2017199342A1 (fr) 2017-11-23
CN109154464A (zh) 2019-01-04
EP3460360A1 (fr) 2019-03-27

Similar Documents

Publication Publication Date Title
JP6121075B1 (ja) 冷凍サイクル装置
JP6143977B1 (ja) 冷凍サイクル装置及び冷凍サイクルシステム
JP6289757B2 (ja) 冷凍サイクル装置及び冷凍サイクルシステム
EP3591304B1 (fr) Dispositif à cycle de réfrigération et système à cycle de réfrigération
AU2016404760B2 (en) Refrigeration cycle apparatus
WO2016157615A1 (fr) Dispositif à cycle de réfrigération et système à cycle de réfrigération
CN109073306B (zh) 制冷循环装置
WO2017037841A1 (fr) Appareil à cycle frigorifique et procédé de mise en place associé

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 2018518238

Country of ref document: JP

NENP Non-entry into the national phase

Ref country code: DE

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17799233

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2017799233

Country of ref document: EP

Effective date: 20181217