EP4290144A1 - Dispositif de cycle de pompe à chaleur - Google Patents

Dispositif de cycle de pompe à chaleur Download PDF

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Publication number
EP4290144A1
EP4290144A1 EP23175404.5A EP23175404A EP4290144A1 EP 4290144 A1 EP4290144 A1 EP 4290144A1 EP 23175404 A EP23175404 A EP 23175404A EP 4290144 A1 EP4290144 A1 EP 4290144A1
Authority
EP
European Patent Office
Prior art keywords
electrical equipment
equipment box
refrigerant
heat exchanger
pump cycle
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
EP23175404.5A
Other languages
German (de)
English (en)
Inventor
Jun Yoshida
Ko Inagaki
Yuki YAMAOKA
Shunji Moriwaki
Shigeo Aoyama
Kazuhito Nakatani
Masaaki Nagai
Yohei MATSUNAMI
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 EP4290144A1 publication Critical patent/EP4290144A1/fr
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
    • F24F1/24—Cooling of electric components
    • 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

Definitions

  • Japanese Patent Laid-Open No. 2008-101862 discloses a configuration of an electrical equipment box that can mitigate an increase in temperature inside a casing (electrical equipment box), which has a sealed structure and stores electrical equipment, by thermally coupling, through a cooling jacket, the casing and refrigerant piping through which a flammable refrigerant flows.
  • This disclosure includes: the refrigerant piping through which the flammable refrigerant flows; the casing which has a sealed structure, is made of an electrically conductive material, and stores electrical equipment; and the cooling jacket which is made of an electrically conductive material, partly covers the refrigerant piping, and is thermally coupled to the refrigerant piping.
  • the casing is thermally coupled to the refrigerant piping through the cooling jacket.
  • the cooling jacket is electrically connected to the refrigerant piping, and the casing is electrically connected through the cooling jacket to the refrigerant piping.
  • Japanese Patent Laid-Open No. H11-094291 discloses a configuration in which an unsealed electrical equipment box is mounted in an air conditioner body.
  • a heat pump cycle device includes: 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, wherein the electrical equipment box is configured to be airtight, and a circulation device for circulating air is installed inside the electrical equipment box.
  • an electrical equipment box is configured to have a sealed structure to prevent a flammable gas from entering into the electrical equipment box, or the electrical equipment box is provided with air permeability to dilute the entered flammable gas to be below an ignition concentration.
  • the electrical equipment box has a sealed structure, an increase in the temperature of the electrical equipment box becomes larger, which may lead to deterioration of the electrical components and a lowering of the reliability.
  • the electrical equipment box is provided with air permeability, the dilution of the flammable refrigerant may be insufficient due to factors such as clogging with debris.
  • it may be difficult to reliably separate the flammable refrigerant and an ignition source, and therefore the present inventors have configured a subject matter of the present disclosure that more sufficiently ensures safety measures against ignition due to spark, and a leakage of the refrigerant into a living space.
  • the present disclosure provides a heat pump cycle device using a flammable refrigerant, which can achieve both the airtightness of an electrical equipment box and heat radiation of electrical equipment, and improve safety and reliability.
  • Figure 1 is a perspective view of a heat pump cycle device according to Embodiment 1.
  • Figure 2 is an exploded perspective view of the heat pump cycle device according to Embodiment 1.
  • Figure 3 is a front view showing a state in which a front panel and a right-side front panel of the heat pump cycle device according to Embodiment 1 are removed.
  • Figure 4 is a front view showing a schematic structure of the heat pump cycle device according to Embodiment 1.
  • 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 the up-down direction is installed 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 (see Figure 4 ).
  • the housing 10 has a bottom plate 14 forming a bottom surface of the housing 10, a right-side front panel 15a and a right-side rear panel 15b 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 a propeller-shaped impeller is used.
  • the blower device 21 is disposed such that an axial flow direction is directed to the ventilation part 18.
  • a compressor 22 Stored in the mechanical chamber 13 are various pieces of equipment, such as a compressor 22, a use side heat exchanger 23 and expansion means 24 (see Figure 5 ), forming a refrigerant circuit, and refrigerant piping 25 connecting these pieces of equipment to each other.
  • a compressor 22 Stored in the mechanical chamber 13 are various pieces of equipment, such as a compressor 22, a use side heat exchanger 23 and expansion means 24 (see Figure 5 ), forming a refrigerant circuit, 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.
  • An upper portion of the partition plate 11 is cut out to enable installation of an electrical equipment box 30.
  • the electrical equipment box 30 is installed in the cut-out part of the upper portion of the partition plate 11.
  • Figure 5 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 the 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 Figure 5 , 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.
  • 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 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 Figure 5 , is heat-exchanged with outside air by the heat source side heat exchanger 20, is decompressed by the expansion means 24, and 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.
  • Figure 6 is an exploded perspective view showing the electrical equipment box of Embodiment 1.
  • Figure 7 is a plan view showing the electrical equipment box of Embodiment 1 in a state in which the lid member is removed.
  • Figure 8 is a longitudinal sectional view showing the electrical equipment box of Embodiment 1.
  • the electrical equipment box 30 is disposed in the cut-out part of the upper portion of the partition plate 11.
  • the electrical equipment box 30 is disposed across the mechanical chamber 13 and the blower chamber 12.
  • the electrical equipment box 30 includes an open-top box-shaped electrical equipment box body 32 with an opening 31, and a lid member 33 for closing the opening 31.
  • a substantially rectangular bottom surface opening 35 is formed on a bottom surface 34 of the electrical equipment box body 32.
  • 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.
  • 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 surface opening 35.
  • a fan 44 in the electrical equipment box 30 is installed as a circulation device in the vicinity of a reactor 43 which generates a large amount of heat among the electronic components.
  • the refrigerant flows as shown by the broken-line arrows in Figure 5 , is heat-exchanged with outside air by the heat source side heat exchanger 20, is decompressed by the expansion means 24, is then sent to the use side heat exchanger 23 to cool the water flowing through the water supply piping 28, and is then returned again to the compressor 22.
  • the fan 44 is installed inside the electrical equipment box 30, and the air inside the electrical equipment box 30 can be circulated by driving the fan 44 in the electrical equipment box 30.
  • At least the portion of the electrical equipment box 30, which is located in the blower chamber 12, is made of a metal material
  • the control board 40 stored in the electrical equipment box 30 is provided with the radiator plate 41
  • the radiator plate 41 is disposed in the blower chamber 12.
  • the electric equipment box 30 is made of the metal material, it is possible to increase the heat transmission efficiency, and improve the cooling efficiency of the electrical equipment box 30.
  • the control board 40 can be cooled through the radiator plate 41 by the air sent from the blower device 21.
  • the ventilable space is formed between the top plate 17 of the housing 10 and the electrical equipment box 30.
  • 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 1 is described as an example of 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, wherein the electrical equipment box is configured to be airtight, and a circulation device for circulating air is installed inside the electrical equipment box.
  • the temperature distribution inside the electrical equipment box can be more averaged by the circulation device in the electrical equipment box, the temperature of electronic components such as a reactor disposed in the electrical equipment box can be averaged, and malfunctions and shortening of the service life of a product can be mitigated.
  • the electrical equipment box is configured to be airtight, entry of leaked refrigerant into the electrical equipment box is prevented, and it is possible to take anti-explosion measures, and improve safety.
  • the heat pump cycle device according to configuration 1 or configuration 2, wherein at least the portion of the electrical equipment box, which is located in the blower chamber, is made of a metal material, a control board stored in the electrical equipment box is provided with a radiator plate, and the radiator plate is disposed in the blower chamber.
  • the electrical equipment box is made of the metal material, it is possible to increase the heat transmission efficiency, and improve the cooling efficiency of the electrical equipment box. Moreover, it is possible to cool the control board through the radiator plate by the air sent from the blower device.
  • thermoelectric device according to any one of configuration 1 to configuration 3, wherein a ventilable space is formed between a top plate of the housing and the electrical equipment box.
  • the heat pump cycle device according to any one of configuration 1 to configuration 4, 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 electrical equipment box 30 has a sealed structure, and is isolated from the flammable refrigerant described above. Consequently, even if the flammable refrigerant leaks, it is possible to prevent accidents such as ignition due to spark.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Inverter Devices (AREA)
EP23175404.5A 2022-06-08 2023-05-25 Dispositif de cycle de pompe à chaleur Pending EP4290144A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2022092751A JP2023179867A (ja) 2022-06-08 2022-06-08 ヒートポンプサイクル装置

Publications (1)

Publication Number Publication Date
EP4290144A1 true EP4290144A1 (fr) 2023-12-13

Family

ID=86603853

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23175404.5A Pending EP4290144A1 (fr) 2022-06-08 2023-05-25 Dispositif de cycle de pompe à chaleur

Country Status (2)

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EP (1) EP4290144A1 (fr)
JP (1) JP2023179867A (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1194291A (ja) 1997-09-24 1999-04-09 Toshiba Corp 空気調和機
JP2008101862A (ja) 2006-10-20 2008-05-01 Daikin Ind Ltd 電装品箱
CN201297714Y (zh) * 2008-09-18 2009-08-26 珠海格力电器股份有限公司 一种空调室外机
JP2010038514A (ja) * 2008-08-08 2010-02-18 Corona Corp ヒートポンプ装置
WO2013001829A1 (fr) * 2011-06-29 2013-01-03 パナソニック株式会社 Dispositif de refroidissement et climatiseur comprenant celui-ci
CN202835659U (zh) * 2012-09-19 2013-03-27 广东美的制冷设备有限公司 密闭电控盒和空调室外机
CN208186646U (zh) * 2018-01-25 2018-12-04 珠海格力电器股份有限公司 一种电器盒、电器盒组件和空调器

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1194291A (ja) 1997-09-24 1999-04-09 Toshiba Corp 空気調和機
JP2008101862A (ja) 2006-10-20 2008-05-01 Daikin Ind Ltd 電装品箱
JP2010038514A (ja) * 2008-08-08 2010-02-18 Corona Corp ヒートポンプ装置
CN201297714Y (zh) * 2008-09-18 2009-08-26 珠海格力电器股份有限公司 一种空调室外机
WO2013001829A1 (fr) * 2011-06-29 2013-01-03 パナソニック株式会社 Dispositif de refroidissement et climatiseur comprenant celui-ci
CN202835659U (zh) * 2012-09-19 2013-03-27 广东美的制冷设备有限公司 密闭电控盒和空调室外机
CN208186646U (zh) * 2018-01-25 2018-12-04 珠海格力电器股份有限公司 一种电器盒、电器盒组件和空调器

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