EP4279826A1 - Wärmepumpenkreislaufvorrichtung - Google Patents

Wärmepumpenkreislaufvorrichtung Download PDF

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Publication number
EP4279826A1
EP4279826A1 EP23171991.5A EP23171991A EP4279826A1 EP 4279826 A1 EP4279826 A1 EP 4279826A1 EP 23171991 A EP23171991 A EP 23171991A EP 4279826 A1 EP4279826 A1 EP 4279826A1
Authority
EP
European Patent Office
Prior art keywords
cable
electrical equipment
equipment box
pump cycle
heat exchanger
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.)
Pending
Application number
EP23171991.5A
Other languages
English (en)
French (fr)
Inventor
Ko Inagaki
Yuki YAMAOKA
Jun Yoshida
Shunji Moriwaki
Shigeo Aoyama
Masaaki Nagai
Kazuhito Nakatani
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.)
Panasonic Intellectual Property Management Co Ltd
Original Assignee
Panasonic Intellectual Property Management Co Ltd
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 Panasonic Intellectual Property Management Co Ltd filed Critical Panasonic Intellectual Property Management Co Ltd
Publication of EP4279826A1 publication Critical patent/EP4279826A1/de
Pending 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
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/20—Electric components for separate outdoor units
    • F24F1/22—Arrangement or mounting thereof
    • 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
    • F24F11/89—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H4/00—Fluid heaters characterised by the use of heat pumps
    • F24H4/02—Water heaters

Definitions

  • the present invention relates to a heat pump cycle device.
  • the present disclosure provides a heat pump cycle device with improved safety that maintains airtightness of an electrical equipment box by disposing a cable outlet of the electrical equipment box on a mechanical chamber side, and reliably prevents ignition even if a refrigerant leaks.
  • the inventors have found a problem that, if the electrical equipment box is sealed, the temperature inside the electrical equipment box rises, and, as a result, the seal at an outlet for pulling out a cable from the electrical equipment box deteriorates, and airtightness cannot be maintained.
  • the inventors have invented the subject matter of this disclosure.
  • the present disclosure provides a heat pump cycle device with improved safety by disposing a cable outlet of an electrical equipment box on a mechanical chamber side so as to maintain the airtightness of the electrical equipment box, and reliably prevent ignition even if a refrigerant leaks.
  • FIG. 1 is a perspective view of a heat pump cycle device according to Embodiment 1.
  • FIG. 2 is an exploded perspective view of the heat pump cycle device according to Embodiment 1.
  • FIG. 3 is a front view showing a state in which a front panel of the heat pump cycle device according to Embodiment 1 is removed.
  • a heat pump cycle device 1 has a box-shaped housing 10.
  • each part of the housing 10 is made of a steel plate.
  • a partition plate 11 extending in an up-down direction is provided inside the housing 10.
  • the inside space of the housing 10 is partitioned into a blower chamber 12 and a mechanical chamber 13 by the partition plate 11.
  • the housing 10 has a bottom plate 14 forming a bottom surface of the housing 10, a pair of side panels 15 covering the mechanical chamber 13 of the housing 10 from the front and rear thereof, a front panel 16 covering a front side of the blower chamber 12, and a top plate 17 covering a top side of the housing 10.
  • the front panel 16 is provided with a ventilation part 18 formed in a mesh shape to allow passage of air.
  • a heat source side heat exchanger 20 and a blower device 21 are installed in the blower chamber 12.
  • the heat source side heat exchanger 20 of the present embodiment extends along a height direction of the housing 10, and is formed in a substantially L shape in a plan view of the housing 10 so as to face a side surface and a back surface of the housing 10.
  • heat source side heat exchanger 20 for example, a fin-tube heat exchanger is used.
  • blower device 21 for example, an axial fan with propeller-like impeller is used.
  • the blower device 21 is disposed so as to direct an axial flow direction to the ventilation part 18.
  • a refrigerant circuit Stored in the mechanical chamber 13 are various pieces of equipment forming a refrigerant circuit, such as a compressor 22, a use side heat exchanger 23, and expansion means 24 (see FIG. 4 ), and refrigerant piping 25 connecting these pieces of equipment to each other.
  • a plate heat exchanger is used for the use side heat exchanger 23 for example.
  • a cut-out part 26 is formed in an upper portion of the partition plate 11, and an electrical equipment box 30 is installed in the cut-out part 26.
  • FIG. 4 is a circuit diagram showing a refrigerant circuit according to Embodiment 1.
  • the compressor 22, a four-way valve 27, the use side heat exchanger 23, the expansion means 24, and the heat source side heat exchanger 20 are annularly connected through predetermined refrigerant piping 25 so as to form the refrigerant circuit.
  • Predetermined water supply piping 28 is connected to the use side heat exchanger 23, and, in the use side heat exchanger 23, heat exchange is performed with a refrigerant circulating in the refrigerant circuit.
  • the refrigerant compressed to high temperature and high pressure by the compressor 22 flows as shown by the solid-line arrows in FIG. 4 , and is sent to the use side heat exchanger 23 in which the refrigerant is heat-exchanged with water flowing through the water supply piping 28, and is cooled and condensed by the use side heat exchanger 23.
  • the water that becomes hot water by receiving the heat of the refrigerant is supplied to a predetermined location.
  • the refrigerant discharged from the use side heat exchanger 23 is decompressed by the expansion means 24 to evaporate, is heat-exchanged in the heat source side heat exchanger 20 to be a gas refrigerant, and is returned again to the compressor 22.
  • the refrigerant flows as shown by the broken-line arrows in FIG. 4 , is heat-exchanged with outside air in the heat source side heat exchanger 20, is decompressed by the expansion means 24, and is then sent to the use side heat exchanger 23 so as to enable cooling of the water flowing through the water supply piping 28.
  • a flammable refrigerant is used as the refrigerant.
  • the flammable refrigerant is R32 or a mixed refrigerant containing 70 weight percent or more of R32, or propane or a mixed refrigerant containing propane.
  • an inflammable refrigerant may be used as the refrigerant, instead of the flammable refrigerant.
  • FIG. 5 is an exploded perspective view showing the electrical equipment box of Embodiment 1.
  • FIG. 6 is a longitudinal sectional view showing the electrical equipment box of Embodiment 1.
  • the electrical equipment box 30 is disposed above the blower chamber 12 and the mechanical chamber 13.
  • the electrical equipment box 30 is disposed across the mechanical chamber 13 and the blower chamber 12.
  • the electrical equipment box 30 includes a box-shaped electrical equipment box body 32 with an open-top opening 31, and a lid member 33 for closing the opening 31.
  • a substantially rectangular bottom opening 35 is formed on an electrical equipment box bottom surface 34 of the electrical equipment box body 32.
  • the entire electrical equipment box body 32 is made of a metal material, only a portion located in the blower chamber 12 may be made of a metal material.
  • the lid member 33 is formed in a substantially rectangular flat plate shape.
  • the lid member 33 is preferably made of a metal material with high thermal conductivity like the electrical equipment box body 32.
  • a control board 40 made of a printed wiring board, and various electronic components are stored in the electrical equipment box 30.
  • control board 40 for example, electronic components such as a semiconductor chip like a CPU, a transistor, a capacitor, and a resistor are mounted to form an electrical circuit.
  • electronic components such as a semiconductor chip like a CPU, a transistor, a capacitor, and a resistor are mounted to form an electrical circuit.
  • a radiator plate 41 with a plurality of fins is installed on a lower surface of the control board 40 so as to project downward from the bottom opening 35.
  • the control board 40 is installed such that the radiator plate 41 projects downward from the bottom opening 35.
  • a seal material 42 is disposed on a peripheral edge of the bottom opening 35, and the control board 40 is installed so as to close the bottom opening 35 through the seal material 42, and is secured in this state.
  • control board 40 Other electronic components which are electrically connected to the control board 40 are installed on both sides of the control board 40 on the electrical equipment box bottom surface 34 of the electrical equipment box body 32.
  • the lid member 33 is secured through the seal material 42 to the top of the electrical equipment box body 32 with screws or the like. Consequently, the inside of the electrical equipment box body 32 is made a sealed space.
  • a ventilable space is formed between the lower surface of the top plate 17 of the housing 10 and an upper surface of the electrical equipment box 30.
  • An outlet 46 for a cable 45, which is electrically connected to the control board 40, is provided on the electrical equipment box bottom surface 34 of the electrical equipment box body 32, at a point located in the mechanical chamber 13.
  • a cable gland 50 is attached to the outlet 46.
  • the cable 45 is taken out of the electrical equipment box 30 through the cable gland 50, and connected to predetermined equipment such as the compressor 22.
  • FIG. 7 is a perspective view showing the cable gland of Embodiment 1.
  • FIG. 8 is a longitudinal sectional view showing the cable gland of Embodiment 1.
  • the cable gland 50 has a gland body 51 which is attached to the electrical equipment box bottom surface 34 of the electrical equipment box 30.
  • the gland body 51 includes a flange part 52 which is provided at a substantially central portion in the axial direction, and protrudes toward an outer periphery.
  • a flange part 52 Formed above the flange part 52 is an insertion part 54 that penetrates the electrical equipment box bottom surface 34 of the electrical equipment box 30, and has an external thread 53 formed on an outer circumference.
  • a holding part 55 Formed at a lower upper portion of the flange part 52 is a holding part 55 with the external thread 53 formed on the outer circumference surface.
  • the cable gland 50 includes a nut member 57 formed with an internal thread 56 that is screwed with the external thread 53 of the holding part 55.
  • a cylindrical seal member 58 is inserted into the holding part 55.
  • the insertion part 54 of the gland body 51 is inserted into the electrical equipment box bottom surface 34 of the electrical equipment box 30 from below.
  • a seal member 59 is disposed between the upper side of the flange part 52 and the electrical equipment box bottom surface 34 of the electrical equipment box 30.
  • the cable 45 is inserted into the inside of the gland body 51 and into the inside of the seal material 58, and the nut member 57 is tightened and secured to the holding part 55 by screwing the internal thread 56 of the nut member 57 with the external thread 53 of the holding part 55.
  • the seal material 58 is deformed by tightening the nut member 57, and the seal material 58 is closely attached to an external surface of the cable 45. Consequently, it is possible to airtightly hold the cable 45 with respect to electrical equipment box 30.
  • the cable 45 is the multi-core cable 45 including a plurality of core wires covered with an outer covering.
  • the outlet 46 for the cable 45 at the mechanical chamber 13 in which the influence of the heat source side heat exchanger 20 is small and a change in temperature is smaller than in the blower chamber 12, it is possible to reduce the deterioration over time of the cable 45 and the outlet 46. Furthermore, since the electrical equipment box 30 is disposed in an upper portion near the top plate 17 away from a lower portion of the housing 10 in which the refrigerant with a higher specific gravity than air is likely to accumulate, if the refrigerant leaks, it is possible to reduce the amount of the refrigerant entering into the electrical equipment box 30.
  • the refrigerant compressed to high temperature and high pressure by the compressor 22 flows as shown by the solid-line arrows in FIG. 4 , is sent to the use side heat exchanger 23, and is cooled by heat exchange with the water flowing through the water supply piping 28 by the use side heat exchanger 23, and the water becomes hot water by receiving the heat of the refrigerant, and is supplied to a predetermined location.
  • the refrigerant discharged from the use side heat exchanger 23 is decompressed by the expansion means 24 and heat-exchanged by the heat source side heat exchanger 20 to be a gas refrigerant, and is returned again to the compressor 22.
  • the refrigerant flows as shown by the broken-line arrows in FIG. 4 , is heat-exchanged with outside air by the heat source side heat exchanger 20, is decompressed by the expansion means 24, and is then sent to the use side heat exchanger 23 so as to cool the water flowing through the water supply piping 28.
  • the entire surface of the electrical equipment box 30 can be cooled by the air, and a rise in temperature of electronic components 43 stored inside the electrical equipment box 30 can be suppressed.
  • the air flows to the radiator plate 41. Consequently, the radiator plate 41 can be cooled, and the control board 40 can be cooled through the radiator plate 41.
  • the cable gland 50 is disposed on the lower surface of the electrical equipment box 30, and the cable 45 is arranged to extend downward from the electrical equipment box 30, an uneven load due to the weight of the cable 45 does not occur and deformation of the cable 45 due to twisting of the cable 45 is smaller compared to a case in which the cable 45 is arranged sideways, and therefore the contact between the seal material 58 of the cable gland 50 and the cable 45 is evenly maintained over the entire circumference.
  • the heat pump cycle device 1 includes: the compressor 22, the use side heat exchanger 23, the expansion means 24, and the heat source side heat exchanger 20 stored inside the housing 10; the refrigerant circuit connecting these members annularly and using the flammable refrigerant; the blower device 21 for circulating air through the heat source side heat exchanger 20; and the electrical equipment box 30 configured to be airtight, wherein the compressor 22, the use side heat exchanger 23, and the expansion means 24 are disposed in the mechanical chamber 13 located on one side of the housing 10, the heat source side heat exchanger 20 and the blower device 21 are disposed in the blower chamber 12 located on another side of the housing 10, the electrical equipment box 30 is disposed across the mechanical chamber 13 and the blower chamber 12, and is provided with the cable 45 that electrically connects the control board in the electrical equipment box 30 and external equipment of the electrical equipment box 30, and the outlet 46 for the cable 45 is disposed on the mechanical chamber 13 side of the electrical equipment box 30.
  • the cable gland 50 for airtightly holding the cable 45 with respect to the electrical equipment box 30 is attached to the outlet 46.
  • the cable gland 50 is disposed on the lower surface of the electrical equipment box 30, and the cable 45 is arranged to extend downward from the electrical equipment box 30.
  • the cable 45 is constituted by one multi-core cable 45 including a plurality of core wires covered with an outer covering, and the cable gland 50 airtightly holds the one cable 45.
  • the flammable refrigerant is R32 or a mixed refrigerant containing 70 weight percent or more of R32, or propane or a mixed refrigerant containing propane.
  • Embodiment 2 shows another example of the cable 45 that is held more airtightly by the cable gland 50.
  • the configuration of the heat pump cycle device is the same as in Embodiment 1.
  • the cable gland 50 of Embodiment 2 will be described.
  • the cable 45 is constituted by a plurality of cables 45.
  • the seal material 58 of the cable gland 50 is formed with a plurality of insertion holes 61 into which the plurality of cables 45 are inserted.
  • the cables 45 are inserted into the insertion holes 61, respectively, of the seal material 58, and the nut member 57 is tightened and secured to the holding part 55 by screwing the internal thread 56 of the nut member 57 with the external thread 53 of the holding part 55.
  • the seal material 58 is deformed by tightening the nut member 57, and the seal material 58 is closely attached to the external surface of each cable 45 inserted into the insertion hole 61. Consequently, the respective cables 45 can be airtightly held with respect to the electrical equipment box 30.
  • the cable 45 is constituted by a plurality of cables 45
  • the seal material 58 of the cable gland 50 has the insertion holes 61 into which the plurality of cables 45 are inserted, and the cable gland 50 airtightly holds the plurality of cables 45.
  • Embodiment 1 is described as an example of the technology disclosed in the present application.
  • the technology in the present disclosure is not limited to this, and can also be applied to embodiments in which modifications, replacements, additions, omissions, etc. are made.
  • a heat pump cycle device including: a compressor, a use side heat exchanger, expansion means, and a heat source side heat exchanger stored inside a housing; a refrigerant circuit connecting these members annularly and using a flammable refrigerant; a blower device for circulating air through the heat source side heat exchanger; and an electrical equipment box configured to be airtight, wherein the compressor, the use side heat exchanger, and the expansion means are disposed in a mechanical chamber located on one side of the housing, the heat source side heat exchanger and the blower device are disposed in a blower chamber located on another side of the housing, the electrical equipment box is disposed across the mechanical chamber and the blower chamber, and is provided with a cable that electrically connects a control board in the electrical equipment box and external equipment of the electrical equipment box, and an outlet for the cable is disposed on the mechanical chamber side of the electrical equipment box.
  • the heat pump cycle device according to configuration 1, wherein the outlet is provided with a cable gland for airtightly holding the cable with respect to the electrical equipment box.
  • the airtightness of the cable can be kept by the cable gland.
  • the heat pump cycle device according to configuration 1 or configuration 2, wherein the cable gland airtightly holds the cable by closely attaching the cable and a seal material made of an elastic material to each other.
  • the airtightness of the cable can be kept by the seal material of the cable gland.
  • the heat pump cycle device according to configuration 2 or configuration 3, wherein the cable gland is disposed on a lower surface of the electrical equipment box, and the cable is arranged to extend downward from the electrical equipment box.
  • the heat pump cycle device according to any one of configuration 2 to configuration 4, wherein the cable is constituted by one multi-core cable including a plurality of core wires covered with an outer covering, and the cable gland airtightly holds the one cable.
  • the heat pump cycle device according to any one of configuration 2 to configuration 4, wherein the cable is constituted by a plurality of cables, the seal material of the cable gland has an insertion hole into which the plurality of cables are inserted, and the cable gland airtightly holds the plurality of cables.
  • the heat pump cycle device according to any one of configuration 1 to configuration 6, wherein the flammable refrigerant is R32 or a mixed refrigerant containing 70 weight percent or more of R32, or propane or a mixed refrigerant containing propane.
  • the present disclosure can be suitably applied to a heat pump cycle device that can suppress an increase in temperature of electronic components disposed in the electronic component box, prevent malfunctions and shortening of the service life of a product, prevent a leaked refrigerant from entering into the electrical equipment box, take an anti-explosion measure, and improve safety.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Connection Or Junction Boxes (AREA)
  • Installation Of Indoor Wiring (AREA)
  • Cable Accessories (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
EP23171991.5A 2022-05-16 2023-05-08 Wärmepumpenkreislaufvorrichtung Pending EP4279826A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2022080239A JP2023168874A (ja) 2022-05-16 2022-05-16 ヒートポンプサイクル装置

Publications (1)

Publication Number Publication Date
EP4279826A1 true EP4279826A1 (de) 2023-11-22

Family

ID=86330628

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23171991.5A Pending EP4279826A1 (de) 2022-05-16 2023-05-08 Wärmepumpenkreislaufvorrichtung

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EP (1) EP4279826A1 (de)
JP (1) JP2023168874A (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101389447B1 (ko) * 2014-02-05 2014-05-30 (주)에이원엔지니어링 방폭 처리된 이동식 에어컨
JP2015055455A (ja) 2013-09-13 2015-03-23 三菱電機株式会社 室外機及び空気調和機
KR20180007413A (ko) * 2016-07-13 2018-01-23 주식회사 웰라스 방폭형 공조 장치
CN113915692A (zh) * 2020-07-07 2022-01-11 宁波奥克斯电气股份有限公司 一种电控盒组件、空调器及外机主板温度控制方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015055455A (ja) 2013-09-13 2015-03-23 三菱電機株式会社 室外機及び空気調和機
KR101389447B1 (ko) * 2014-02-05 2014-05-30 (주)에이원엔지니어링 방폭 처리된 이동식 에어컨
KR20180007413A (ko) * 2016-07-13 2018-01-23 주식회사 웰라스 방폭형 공조 장치
CN113915692A (zh) * 2020-07-07 2022-01-11 宁波奥克斯电气股份有限公司 一种电控盒组件、空调器及外机主板温度控制方法

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Publication number Publication date
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