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WO2019198176A1 - Unité intérieure pour dispositif de climatisation - Google Patents

Unité intérieure pour dispositif de climatisation Download PDF

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Publication number
WO2019198176A1
WO2019198176A1 PCT/JP2018/015226 JP2018015226W WO2019198176A1 WO 2019198176 A1 WO2019198176 A1 WO 2019198176A1 JP 2018015226 W JP2018015226 W JP 2018015226W WO 2019198176 A1 WO2019198176 A1 WO 2019198176A1
Authority
WO
WIPO (PCT)
Prior art keywords
air
refrigerant
air volume
indoor
detection sensor
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2018/015226
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English (en)
Japanese (ja)
Inventor
智史 高橋
和樹 渡部
昌彦 高木
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP2020512994A priority Critical patent/JP6847303B2/ja
Priority to PCT/JP2018/015226 priority patent/WO2019198176A1/fr
Publication of WO2019198176A1 publication Critical patent/WO2019198176A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—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
    • 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

Definitions

  • the present invention relates to an indoor unit of an air conditioner that performs air conditioning of a target space.
  • an air conditioner using a flammable refrigerant is provided with a refrigerant leakage detection sensor for detecting the leakage of the refrigerant when the refrigerant leaks.
  • Patent Document 1 discloses that in an air conditioner using a flammable refrigerant, a refrigerant leakage detection sensor is provided on the air path of the indoor unit.
  • a refrigerant leakage detection sensor is provided at a position equivalent to, or a position below, the abutting portion that is the lowest vertical portion of the indoor heat exchanger. Is disclosed.
  • the refrigerant leakage detection sensor is installed at the bottom of the indoor unit in which the refrigerant having a specific gravity higher than that of the air stays.
  • refrigerant leakage may not be detected even if a refrigerant leakage detection sensor is installed at the bottom of the indoor unit. In that case, it is necessary to install a plurality of refrigerant leak detection sensors in the indoor unit and to constantly monitor the refrigerant leak with these refrigerant leak detection sensors.
  • the refrigerant leakage detection sensor is energized when the air conditioner is energized to detect the presence or absence of refrigerant leakage. For this reason, the refrigerant leak detection sensor has a change in detection accuracy due to a secular change caused by energization, and the refrigerant leak cannot be accurately detected when used for a long time.
  • This invention is made in view of said subject, Comprising: It aims at providing the indoor unit of the air conditioning apparatus which can detect the leakage of a refrigerant
  • An indoor unit of an air conditioner is an indoor unit of an air conditioner having an air inlet and an air outlet, and an indoor fan arranged on an air path extending from the air inlet to the air outlet, A plurality of refrigerant leakage detection sensors provided on the road for detecting refrigerant leakage, an air volume determination unit for determining an air volume of the air flowing through the air path based on the number of rotations of the indoor fan, and according to the air volume, Leakage determination for determining presence or absence of leakage of the refrigerant based on a sensor selection unit that selects a refrigerant leakage detection sensor to be used among the plurality of refrigerant leakage detection sensors and detection information from the selected refrigerant leakage detection sensor Part.
  • the refrigerant leakage detection sensor to be used is selected according to the air volume based on the rotation speed of the indoor blower, and the detection from the selected refrigerant leakage detection sensor is performed. Since the presence or absence of the refrigerant leakage is determined based on the information, the refrigerant leakage can be detected more reliably.
  • FIG. It is the schematic which shows an example of a structure of the air conditioning apparatus which concerns on Embodiment 1.
  • FIG. It is a functional block diagram which shows an example of a structure of the control apparatus of FIG. It is a perspective view which shows an example of the external appearance of the indoor unit of FIG. It is sectional drawing which shows an example of the internal structure of the indoor unit of FIG. It is a flowchart which shows an example of the flow of the refrigerant
  • FIG. It is sectional drawing which shows an example of the internal structure of the indoor unit of FIG. 5 is a functional block diagram illustrating an example of a configuration of a control device according to Embodiment 2.
  • FIG. It is a flowchart which shows an example of the flow of the refrigerant
  • FIG. 1 is a schematic diagram illustrating an example of the configuration of the air-conditioning apparatus 100 according to Embodiment 1.
  • the air conditioning apparatus 100 includes an outdoor unit 1, an indoor unit 2, and a control device 3.
  • a refrigerant circuit is formed by connecting the outdoor unit 1 and the indoor unit 2 with a refrigerant pipe 4.
  • one indoor unit 2 is connected to the outdoor unit 1.
  • the present invention is not limited to this, and for example, a plurality of indoor units 2 may be connected.
  • the outdoor unit 1 may be plural.
  • the control apparatus 3 is provided in the indoor unit 2, this is not restricted to this example.
  • the control device 3 may be provided in the outdoor unit 1 or may be provided separately from the outdoor unit 1 and the indoor unit 2.
  • the outdoor unit 1 includes a compressor 11, a refrigerant flow switching device 12, an outdoor heat exchanger 13, and an outdoor blower 14.
  • the compressor 11 sucks low-temperature and low-pressure refrigerant, compresses the sucked refrigerant, and discharges high-temperature and high-pressure refrigerant.
  • the compressor 11 is composed of, for example, an inverter compressor whose capacity, which is a delivery amount per unit time, is controlled by changing an operation frequency.
  • the refrigerant flow switching device 12 is, for example, a four-way valve, and switches between a cooling operation and a heating operation by switching the direction in which the refrigerant flows.
  • the refrigerant flow switching device 12 is switched to the state shown by the solid line in FIG. 1 during the cooling operation.
  • coolant flow path switching apparatus 12 switches to the state shown with the dotted line of FIG. 1 at the time of heating operation. Switching of the flow path in the refrigerant flow switching device 12 is controlled by the control device 3.
  • the outdoor heat exchanger 13 performs heat exchange between the outdoor air and the refrigerant.
  • the outdoor heat exchanger 13 functions as a condenser that radiates the heat of the refrigerant to the outdoor air and condenses the refrigerant during the cooling operation.
  • the outdoor heat exchanger 13 functions as an evaporator that evaporates the refrigerant during the heating operation and cools the outdoor air with the heat of vaporization.
  • the outdoor blower 14 supplies outdoor air to the outdoor heat exchanger 13.
  • the rotational speed of the outdoor blower 14 is controlled by the control device 3. By controlling the number of rotations, the amount of air blown to the outdoor heat exchanger 13 is adjusted.
  • the indoor unit 2 includes an indoor heat exchanger 21, an expansion valve 22, and an indoor blower 23.
  • the expansion valve 22 expands the refrigerant.
  • the expansion valve 22 is configured by a valve capable of controlling the opening degree, such as an electronic expansion valve.
  • the opening degree of the expansion valve 22 is controlled by the control device 3.
  • the indoor heat exchanger 21 performs heat exchange between the air and the refrigerant. Thereby, heating air or cooling air supplied to the air-conditioning target space is generated.
  • the indoor heat exchanger 21 functions as an evaporator during cooling operation, and cools the air in the air-conditioning target space.
  • the indoor heat exchanger 21 functions as a condenser during heating operation, and heats the air in the air-conditioning target space to perform heating.
  • the indoor blower 23 supplies air to the indoor heat exchanger 21.
  • the rotational speed of the indoor blower 23 is controlled by the control device 3. By controlling the number of rotations, the amount of air blown to the indoor heat exchanger 21 is adjusted.
  • the indoor unit 2 includes a first refrigerant leak detection sensor 24A and a second refrigerant leak detection sensor 24B.
  • the first refrigerant leakage detection sensor 24 ⁇ / b> A and the second refrigerant leakage detection sensor 24 ⁇ / b> B are provided for detecting the refrigerant leaked in the indoor unit 2.
  • the first refrigerant leakage detection sensor 24 ⁇ / b> A detects the refrigerant contained in the air taken in by the indoor blower 23.
  • the second refrigerant leakage detection sensor 24B detects the refrigerant staying in the lower part of the indoor unit 2 when the air conditioning apparatus 100 is stopped.
  • the first refrigerant leak detection sensor 24A and the second refrigerant leak detection sensor 24B each detect the refrigerant only when an instruction for refrigerant leak detection is given.
  • Control device 3 Furthermore, the indoor unit 2 is provided with a control device 3.
  • the control device 3 controls the entire air conditioner 100.
  • the control device 3 performs refrigerant leakage detection processing for detecting refrigerant leakage in the indoor unit 2, and controls the operating frequency of the compressor 11 and the rotation speed of the indoor blower 23. To do.
  • FIG. 2 is a functional block diagram showing an example of the configuration of the control device 3 of FIG.
  • the control device 3 is implemented by executing software on an arithmetic device such as a microcomputer, and is configured by hardware such as a circuit device that implements various functions.
  • the control device 3 includes an air volume determination unit 31, a sensor selection unit 32, a leakage determination unit 33, a notification control unit 34, a blower control unit 35, and a compressor control unit 36.
  • the air volume determination unit 31 receives the rotation speed information from the indoor blower 23, and determines the air volume based on the received rotation speed information. In the first embodiment, the air volume determination unit 31 determines the presence or absence of the air volume based on the rotational speed of the indoor blower 23.
  • the sensor selection unit 32 selects a refrigerant leakage detection sensor to be used from the first refrigerant leakage detection sensor 24A and the second refrigerant leakage detection sensor 24B based on the determination result of the air volume determination unit 31.
  • the leakage determination unit 33 determines whether the refrigerant is leaking based on the detection information from the refrigerant leakage detection sensor selected by the sensor selection unit 32.
  • the notification control unit 34 controls the notification unit 5 to notify that a refrigerant leak has occurred when a refrigerant leak has occurred.
  • the notification unit 5 may display information indicating refrigerant leakage using a display unit (not shown) or may output a sound using a voice output unit (not shown).
  • reporting part 5 may alert
  • the notification unit 5 may be provided in the indoor unit 2 or may be provided outside the indoor unit 2.
  • the blower control unit 35 controls the rotation speed of the indoor blower 23. Specifically, the blower control unit 35 increases the rotation speed of the indoor blower 23 when refrigerant leakage occurs.
  • the compressor control unit 36 controls the operating frequency of the compressor 11. Specifically, the compressor control unit 36 sets the operation frequency of the compressor 11 to 0 and stops the compressor 11 when refrigerant leakage occurs.
  • FIG. 3 is a perspective view showing an example of the appearance of the indoor unit 2 of FIG.
  • FIG. 4 is a cross-sectional view showing an example of the internal structure of the indoor unit 2 in FIG.
  • the indoor unit 2 is, for example, a wall-hanging type, and an indoor heat exchanger 21 and an indoor blower 23 are disposed in the main body 20.
  • an expansion valve 22 is also arranged in the main body 20.
  • the main body 20 is formed by a front panel 20a, a side panel 20b, a top panel 20c, a back panel 20d, and a bottom panel 20e.
  • the top panel 20c is formed with a suction port 25 for sucking air around the indoor unit 2 into the interior.
  • the bottom panel 20e is formed with an outlet 26 for blowing out the air sucked into the indoor unit 2 to the outside.
  • An air passage 27 extending from the suction port 25 to the air outlet 26 is formed inside the main body 20.
  • the suction port 25, the filter 28 for preventing foreign matter from entering, the indoor heat exchanger 21, the indoor blower 23, and the air outlet 26 are located from the upstream side in the air flow direction.
  • the first refrigerant leakage detection sensor 24 ⁇ / b> A is provided in the vicinity of the suction port 25 on the air passage 27.
  • the second refrigerant leakage detection sensor 24 ⁇ / b> B is provided below the indoor heat exchanger 21 on the air passage 27.
  • the high-temperature and high-pressure gas refrigerant discharged from the compressor 11 flows into the outdoor heat exchanger 13 via the refrigerant flow switching device 12.
  • the high-temperature and high-pressure gas refrigerant that has flowed into the outdoor heat exchanger 13 is condensed while radiating heat by exchanging heat with the outdoor air taken in by the outdoor blower 14, and flows out from the outdoor heat exchanger 13 as high-pressure liquid refrigerant.
  • the high-pressure liquid refrigerant that has flowed out of the outdoor heat exchanger 13 flows out of the outdoor unit 1 and flows into the indoor unit 2 through the refrigerant pipe 4.
  • the high-pressure liquid refrigerant flowing into the indoor unit 2 is decompressed by the expansion valve 22 to become a low-temperature and low-pressure gas-liquid two-phase refrigerant and flows into the indoor heat exchanger 21.
  • the low-temperature and low-pressure gas-liquid two-phase refrigerant that has flowed into the indoor heat exchanger 21 exchanges heat with the indoor air taken in by the indoor blower 23, absorbs and evaporates, and becomes a low-pressure gas refrigerant from the indoor heat exchanger 21. leak.
  • the low-pressure gas refrigerant that has flowed out of the indoor heat exchanger 21 flows into the outdoor unit 1.
  • the low-pressure gas refrigerant flowing into the outdoor unit 1 passes through the refrigerant flow switching device 12 and is sucked into the compressor 11.
  • Heating operation During the heating operation, the refrigerant flow switching device 12 is switched so that the discharge side of the compressor 11 and the indoor unit 2 side are connected, as indicated by a broken line in FIG.
  • the low-temperature and low-pressure refrigerant is compressed by the compressor 11 and discharged as a high-temperature and high-pressure gas refrigerant.
  • the high-temperature and high-pressure gas refrigerant discharged from the compressor 11 flows out of the outdoor unit 1 through the refrigerant flow switching device 12 and flows into the indoor unit 2.
  • the high-temperature and high-pressure gas refrigerant that has flowed into the indoor unit 2 flows into the indoor heat exchanger 21.
  • the high-temperature and high-pressure gas refrigerant that has flowed into the indoor heat exchanger 21 is condensed while radiating heat by exchanging heat with the indoor air taken in by the indoor blower 23, and flows out from the indoor heat exchanger 21 as a high-pressure liquid refrigerant. .
  • the high-pressure liquid refrigerant that has flowed out of the indoor heat exchanger 21 is decompressed by the expansion valve 22 to become a low-temperature and low-pressure gas-liquid two-phase refrigerant and flows out of the indoor unit 2.
  • the low-temperature and low-pressure gas-liquid two-phase refrigerant that has flowed out of the indoor unit 2 flows into the outdoor unit 1.
  • the low-temperature and low-pressure gas-liquid two-phase refrigerant that has flowed into the outdoor unit 1 flows into the outdoor heat exchanger 13.
  • the low-temperature and low-pressure gas-liquid two-phase refrigerant that has flowed into the outdoor heat exchanger 13 exchanges heat with the outdoor air taken in by the outdoor blower 14, absorbs heat and evaporates, and becomes a low-pressure gas refrigerant from the outdoor heat exchanger 13. leak.
  • the low-pressure gas refrigerant that has flowed out of the outdoor heat exchanger 13 passes through the refrigerant flow switching device 12 and is sucked into the compressor 11.
  • the refrigerant leakage detection sensor to be used is selected based on the air volume, and it is determined whether or not the refrigerant is leaking based on the detection information of the selected refrigerant leakage detection sensor.
  • FIG. 5 is a flowchart showing an example of the flow of refrigerant leakage detection processing by the control device 3 of FIG.
  • the air volume determination unit 31 determines whether there is an air volume based on the rotational speed information received from the indoor blower 23 in step S2.
  • the determination as to whether or not there is an air volume is made based on whether or not the rotational speed of the indoor blower 23 is zero.
  • “the rotational speed of the indoor blower 23 is 0” includes a rotational speed that can be considered that the indoor blower 23 is not rotating.
  • step S2 When it is determined that there is an air volume (step S2; Yes), the sensor selection unit 32 detects the refrigerant leakage in step S3 as the first refrigerant leakage detection sensor 24A and the second refrigerant leakage detection. Both sensors 24B are selected.
  • step S2 when it is determined that there is no air volume (step S2; No), the indoor blower 23 is not rotating and air is not taken into the indoor unit 2, and therefore has a higher specific gravity than air. The refrigerant stays in the lower part of the indoor unit 2. Therefore, the sensor selection unit 32 selects the second refrigerant leakage detection sensor 24B as a sensor for detecting refrigerant leakage in step S4.
  • step S5 the leakage determination unit 33 determines whether or not refrigerant leakage has occurred based on the detection information from the refrigerant leakage detection sensor selected in step S3 or S4.
  • step S6 the notification control unit 34 controls the notification unit 5 so as to notify that refrigerant leakage has occurred.
  • the air blower control unit 35 increases the rotation speed of the indoor air blower 23 so that the leaked refrigerant is diffused into the air-conditioning target space.
  • the compressor control unit 36 controls the operating frequency of the compressor 11 to stop the compressor 11.
  • step S5 if it is determined that no refrigerant leakage has occurred (step S5; No), the process returns to step S1, and monitoring of the refrigerant leakage is continued.
  • coolant leak detection sensor used according to an air volume since the refrigerant
  • FIG. 6 is a perspective view showing an example of the appearance of the indoor unit 2 according to the modification of the first embodiment.
  • FIG. 7 is a cross-sectional view showing an example of the internal structure of the indoor unit 2 of FIG.
  • the indoor unit 2 is a four-way ceiling cassette type, and an indoor heat exchanger 21 and an indoor blower 23 are arranged in the main body 20.
  • an expansion valve 22 is also arranged in the main body 20.
  • the main body 20 is formed with an inlet 25 and an outlet 26.
  • An air passage 27 extending from the suction port 25 to the blowout port 26 is formed inside the main body 20.
  • the suction port 25, the filter 28, the indoor blower 23, the indoor heat exchanger 21, and the air outlet 26 are located from the upstream side in the air flow direction.
  • the first refrigerant leakage detection sensor 24 ⁇ / b> A is provided in the vicinity of the suction port 25 on the air passage 27.
  • the second refrigerant leakage detection sensor 24 ⁇ / b> B is provided below the indoor heat exchanger 21 on the air passage 27.
  • the indoor unit 2 can be applied to a four-way ceiling cassette type. And the indoor unit 2 by a modification can acquire the effect similar to the wall-hanging type indoor unit 2 by this Embodiment 1.
  • FIG. 1 A block diagram illustrating an exemplary computing environment in accordance with the present disclosure.
  • the first refrigerant leakage detection sensor 24A and the first refrigerant leakage detection sensor 24A and the Either or both of the two refrigerant leakage detection sensors 24B are selected. Then, based on detection information from the selected refrigerant leakage detection sensor, the presence or absence of refrigerant leakage is determined. As a result, the leakage of the refrigerant can be reliably detected, and the detection accuracy of the refrigerant leakage detection sensor can be maintained for a longer period.
  • the indoor unit 2 when the indoor blower 23 is not rotating, it is determined that there is no air volume, and the second refrigerant leakage detection sensor 24B is selected.
  • the indoor blower 23 When the indoor blower 23 is rotating, it is determined that the air volume is present, and the first refrigerant leakage detection sensor 24A and the second refrigerant leakage detection sensor 24B are selected.
  • coolant leak detection sensor is selected according to the presence or absence of an air volume, it can be detected correctly whether the refrigerant
  • the indoor unit 2 when the refrigerant leakage is detected, a notification indicating that the refrigerant is leaking is performed. Therefore, when the refrigerant is leaking, it is possible to promptly notify the worker of the refrigerant leak. Furthermore, in the indoor unit 2, when the refrigerant leakage is detected, the rotational speed of the indoor blower 23 is increased. Therefore, the leaked refrigerant can be diffused to prevent dangers such as ignition.
  • Embodiment 2 FIG. Next, a second embodiment of the present invention will be described.
  • the second embodiment is different from the first embodiment in that a refrigerant leakage detection sensor to be used is selected according to the air volume.
  • the refrigerant leakage detection sensor to be used is selected according to the presence or absence of the air volume, but the leaked refrigerant may not diffuse or stay depending on the air volume. For example, when the air volume is relatively small, the leaked refrigerant stays without being diffused. Further, when the air volume is relatively large, the leaked refrigerant diffuses without staying. Therefore, in the second embodiment, a threshold is set for the magnitude of the air volume, and the refrigerant leakage detection sensor to be used is selected according to the relationship between the air volume and the threshold.
  • the indoor unit 2 of the air-conditioning apparatus 100 according to Embodiment 2 includes a control device 103 instead of the control device 3 shown in FIG.
  • the same reference numerals are given to portions common to the first embodiment, and detailed description is omitted.
  • FIG. 8 is a functional block diagram showing an example of the configuration of the control device 103 according to the second embodiment.
  • the control device 103 includes an air volume determination unit 31, a sensor selection unit 32, a leakage determination unit 33, a notification control unit 34, a blower control unit 35, a compressor control unit 36, and a storage unit 37. .
  • the air volume determination unit 31 receives the rotation speed information from the indoor blower 23, and based on the received rotation speed information and a threshold value for the rotation speed stored in the storage unit 37 in advance, the magnitude of the air volume. Determine.
  • the storage unit 37 stores various types of information used when processing is performed by each unit of the control device 103. Various types of information stored in the storage unit 37 are read in response to requests from each unit. In the second embodiment, the storage unit 37 stores a threshold value set in advance with respect to the rotational speed of the indoor blower 23.
  • Threshold value is for determining the air volume step by step, and a plurality of threshold values are set.
  • a first threshold value and a second threshold value larger than the first threshold value are set as the plurality of threshold values.
  • the first threshold is for determining whether or not the air volume is equal to or less than the slight air volume.
  • the second threshold is for determining whether or not the air volume is a high air volume.
  • the air volume is compared with the first threshold value when determining whether or not the air volume is equal to or smaller than the slight air volume, that is, whether or not the air volume is a slight air volume or no air volume. Further, when determining whether or not the air volume is a high air volume, the air volume is compared with a second threshold value. Furthermore, when determining whether or not the air volume is an intermediate air volume that is intermediate between the fine air volume and the high air volume, the air volume is compared with the first threshold value and the second threshold value.
  • refrigerant leak detection processing A refrigerant leakage detection process in the air-conditioning apparatus 100 according to Embodiment 2 will be described.
  • the refrigerant leakage detection sensor to be used is selected based on the air volume, and it is determined whether or not the refrigerant is leaking based on the detection information of the selected refrigerant leakage detection sensor.
  • FIG. 9 is a flowchart showing an example of the flow of refrigerant leakage detection processing by the control device 103 of FIG.
  • symbol shall be attached
  • FIG. S1 when the air conditioner 100 is energized, the air volume determination unit 31 receives the rotation speed information received from the indoor blower 23 in step S11, the first threshold value and the second threshold value stored in the storage unit 37. Based on the threshold value, the magnitude of the air volume is determined.
  • the air volume determination unit 31 determines that the air volume is equal to or less than the slight air volume. And the sensor selection part 32 selects the 2nd refrigerant
  • the air volume determination unit 31 determines that the air volume is an intermediate air volume.
  • the sensor selection unit 32 selects both the first refrigerant leakage detection sensor 24A and the second refrigerant leakage detection sensor 24B as sensors for detecting refrigerant leakage.
  • the air volume determination unit 31 determines that the air volume is a high air volume.
  • the sensor selection unit 32 selects the first refrigerant leakage detection sensor 24A as a sensor for detecting refrigerant leakage.
  • step S5 the leakage determination unit 33 determines whether or not refrigerant leakage has occurred based on detection information from the refrigerant leakage detection sensor selected in steps S12 to S14.
  • step S6 the notification control unit 34 controls the notification unit 5 so as to notify that refrigerant leakage has occurred.
  • the air blower control unit 35 increases the rotation speed of the indoor air blower 23 so that the leaked refrigerant is diffused into the air-conditioning target space.
  • the compressor control unit 36 controls the operating frequency of the compressor 11 to stop the compressor 11.
  • step S5 if it is determined that no refrigerant leakage has occurred (step S5; No), the process returns to step S1, and monitoring of the refrigerant leakage is continued.
  • the second refrigerant leak detection sensor 24B when the rotational speed is equal to or less than the first set threshold value, it is determined that the air volume is equal to or less than the slight air volume, and the second refrigerant leak detection sensor 24B is selected.
  • the rotational speed is greater than the first set threshold and less than or equal to the second set threshold, it is determined that the air volume is the intermediate air volume, and the first refrigerant leak detection sensor 24A and the second refrigerant leak detection Sensor 24B is selected.
  • the rotational speed is larger than the second set threshold, it is determined that the air volume is a high air volume, and the first refrigerant leakage detection sensor 24A is selected.

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  • 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

La présente invention concerne une unité intérieure pour dispositifs de climatisation pourvue d'un orifice d'aspiration, d'un orifice de soufflage et d'une soufflante intérieure disposée sur un trajet d'air s'étendant de l'orifice d'aspiration à l'orifice de soufflage. L'unité intérieure comprend : une pluralité de capteurs de détection de fuite de réfrigérant qui sont disposés sur le trajet d'air et détectent des fuites de réfrigérant ; une unité de détermination de quantité d'air qui détermine la quantité d'air circulant à travers le passage d'air sur la base de la vitesse de rotation de la soufflante intérieure ; une unité de sélection de capteur qui sélectionne le capteur de détection de fuite de réfrigérant à utiliser parmi la pluralité de capteurs de détection de fuite de réfrigérant en fonction de la quantité d'air ; et une unité de détermination de fuite qui détermine la présence d'une fuite de réfrigérant sur la base d'informations de détection provenant du capteur de détection de fuite de réfrigérant sélectionné.
PCT/JP2018/015226 2018-04-11 2018-04-11 Unité intérieure pour dispositif de climatisation Ceased WO2019198176A1 (fr)

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JP2020512994A JP6847303B2 (ja) 2018-04-11 2018-04-11 空気調和装置の室内機
PCT/JP2018/015226 WO2019198176A1 (fr) 2018-04-11 2018-04-11 Unité intérieure pour dispositif de climatisation

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PCT/JP2018/015226 WO2019198176A1 (fr) 2018-04-11 2018-04-11 Unité intérieure pour dispositif de climatisation

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CN114061020B (zh) * 2021-11-17 2023-03-21 苏州浪潮智能科技有限公司 一种双相冷板液冷系统的冷媒泄漏检测方法和系统

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Publication number Priority date Publication date Assignee Title
WO2013038704A1 (fr) * 2011-09-16 2013-03-21 パナソニック株式会社 Climatiseur
WO2015194596A1 (fr) * 2014-06-19 2015-12-23 三菱電機株式会社 Unité intérieure pour dispositif de climatisation, et dispositif de climatisation comprenant ladite unité intérieure

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Publication number Priority date Publication date Assignee Title
WO2013038704A1 (fr) * 2011-09-16 2013-03-21 パナソニック株式会社 Climatiseur
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