WO2023157129A1 - Unité extérieure - Google Patents

Unité extérieure Download PDF

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Publication number
WO2023157129A1
WO2023157129A1 PCT/JP2022/006193 JP2022006193W WO2023157129A1 WO 2023157129 A1 WO2023157129 A1 WO 2023157129A1 JP 2022006193 W JP2022006193 W JP 2022006193W WO 2023157129 A1 WO2023157129 A1 WO 2023157129A1
Authority
WO
WIPO (PCT)
Prior art keywords
mounting surface
partition plate
electrical component
insulating material
heat
Prior art date
Application number
PCT/JP2022/006193
Other languages
English (en)
Japanese (ja)
Inventor
祥治 森田
圭一朗 志津
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 PCT/JP2022/006193 priority Critical patent/WO2023157129A1/fr
Priority to JP2024500771A priority patent/JPWO2023157129A1/ja
Publication of WO2023157129A1 publication Critical patent/WO2023157129A1/fr

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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

Definitions

  • the present disclosure relates to outdoor units of air conditioners.
  • the outdoor unit of an air conditioner contains a heat exchanger, blower fan, electrical equipment box, and compressor inside the housing.
  • the interior of the housing is generally divided into a blower room that houses a heat exchanger and a blower fan, and an electrical equipment box that houses electrical equipment units and a machine room that houses a compressor. .
  • the electrical component box houses electrical component units.
  • the machine room contains electrical units and compressors that are vulnerable to dust and moisture, so it is necessary to protect the electrical units and compressors from dust and moisture.
  • the machine room is a closed space separated from the fan room by a partition plate to prevent dust and water from entering.
  • the electrical unit is equipped with an inverter circuit to control the power and the compressor. Since some electrical parts such as power semiconductor elements and coils used in inverter circuits generate heat, thermal design is required for electrical unit units.
  • Patent Document 1 discloses a configuration in which a capacitor or the like is mounted on one surface of the mounting substrate 50 and a power module is mounted on the other surface.
  • a heat sink is attached to the power module via a heat transfer plate member that is part of a casing that accommodates the mounting board.
  • the main parts that generate heat include the first electric parts, which are power semiconductor elements such as IGBTs (Insulated Gate Bipolar Transistors) and diodes, IPMs (Intelligent Power Modules), reactors, common mode coils, etc. a second electrical component having windings of .
  • IGBTs Insulated Gate Bipolar Transistors
  • IPMs Intelligent Power Modules
  • reactors common mode coils, etc.
  • second electrical component having windings of .
  • the first electrical component is small in size and generates a large amount of heat
  • natural air cooling with a heat sink as in Patent Document 1 is the mainstream for efficient cooling.
  • the second electrical component was often thermally designed to rely on natural convection due to its large component size. Appropriate thermal design is becoming necessary.
  • the heat of the second electric component is transferred to the partition plate through the heat-conducting insulating material. It is conceivable to dissipate the heat from the second electrical component by transmitting it.
  • the heat-conducting insulating material may fall off when the mounting board is removed or attached in the event of an electrical component failure or the like. There is a risk of losing the heat-conducting insulation. That is, there is a problem that workability is poor in the configuration in which the thermal conductive insulating material is sandwiched between the mounting board and the partition plate.
  • the present disclosure has been made in view of the above, and aims to improve workability when mounting and removing a mounting board while ensuring heat dissipation from electrical components mounted on the mounting board.
  • the purpose is to obtain an outdoor unit that can
  • the outdoor unit divides the housing into a blower room in which a blower fan is installed and a machine room in which a compressor is installed.
  • a partition plate a first electrical component is mounted on the first mounting surface;
  • a second electrical component is mounted on the first mounting surface or a second mounting surface that is the back side of the first mounting surface;
  • a mounting board provided in the machine room facing toward the top, a heat sink attached to the first electrical component and having one end fixed to the partition plate, and a position overlapping the second electrical component when viewed from a direction perpendicular to the first mounting surface.
  • the holding sheet metal provided and fixed to the first mounting surface and fixed to the heat sink or the partition plate and the first mounting provided at a position overlapping the second electrical component when viewed in a direction perpendicular to the first mounting surface a thermally conductive insulating material abutting the surface.
  • the holding sheet metal is formed with an accommodating portion in which the surface facing the first mounting surface is recessed, and the accommodating portion accommodates a heat-conducting insulating material.
  • an outdoor unit that can improve workability when mounting and removing the mounting board while ensuring heat dissipation from the electrical components mounted on the mounting board. Effective.
  • FIG. 3 is a partially enlarged cross-sectional view of the A portion shown in FIG. 2, and is a cross-sectional view of the mounting board and its surroundings in the first embodiment;
  • FIG. 3 is a cross-sectional view of the mounting board and its surroundings in Embodiment 2, and corresponds to a partially enlarged cross-sectional view of the portion A shown in FIG. 2;
  • FIG. 3 is a cross-sectional view of the mounting board and its surroundings according to the third embodiment, and corresponds to a partially enlarged cross-sectional view of the portion A shown in FIG. 2;
  • FIG. 3 is a cross-sectional view of the mounting board and its surroundings in the fourth embodiment, and corresponds to a partially enlarged cross-sectional view of the portion A shown in FIG. 2;
  • FIG. 3 is a cross-sectional view of the mounting board and its surroundings in the fifth embodiment, and corresponds to a partially enlarged cross-sectional view of the portion A shown in FIG. 2;
  • FIG. 10 is a cross-sectional view of the mounting board and its surroundings in Embodiment 6, and corresponds to a partially enlarged cross-sectional view of part A shown in FIG. 2;
  • FIG. 1 is an overall external view of an outdoor unit according to Embodiment 1.
  • FIG. 2 is a diagram showing the internal structure of the outdoor unit shown in FIG. 1.
  • FIG. The outdoor unit has a housing 1 .
  • the interior of the housing 1 is divided into a fan room 4 and a machine room 5 by a partition plate 6 .
  • a blower fan 3 is provided in the blower room 4 .
  • a heat exchanger 7 is provided on the rear side of the blower chamber 4 .
  • a wire grill 2 is provided on the front wall of the fan chamber 4 .
  • An opening (not shown) is provided in the back wall of the blower chamber 4 .
  • FIG. 3 is a partially enlarged cross-sectional view of part A shown in FIG.
  • FIG. 4 is a side view of the mounting substrate according to Embodiment 1.
  • the configuration of FIG. 3 will be described.
  • the mounting board 10 has a first electrical component 11 soldered to the first mounting surface 10a and a second electrical component 13 soldered to the second mounting surface 10b.
  • the first electrical component 11 protrudes into the fan chamber 4 through a hole 6 a formed in the partition plate 6 .
  • a heat sink 12 is fixed to the hole 6a from the blower chamber 4 side.
  • the first electrical component 11 is in contact with the heat sink 12 and is thermally coupled with the heat sink 12 .
  • the mounting substrate 10 is provided with the first mounting surface 10 a facing the partition plate 6 .
  • a heat-conducting insulating material 14 in contact with the first mounting surface 10a is provided at a portion of the first mounting surface 10a that serves as the back surface of the second electrical component 13. As shown in FIG. In other words, the heat-conducting insulating material 14 is provided at a position overlapping the second electrical component 13 when viewed from the direction perpendicular to the first mounting surface 10a.
  • a holding sheet metal 16 is provided on the first mounting surface 10 a to connect the mounting board 10 and the partition plate 6 and to fix the thermal conductive insulating material 14 to the mounting board 10 .
  • the holding sheet metal 10 is provided at a position overlapping the second electrical component when viewed in a direction perpendicular to the first mounting surface 10a.
  • the partition plate 6 is formed with a hole 6 b through which the holding sheet metal is exposed to the fan chamber 4 .
  • the first electrical component 11 is, for example, an IC chip
  • the second electrical component 13 is, for example, a reactor or a common mode coil.
  • the first electrical component 11 and the second electrical component 13 of the mounting board 10 When the outdoor unit is operated, the first electrical component 11 and the second electrical component 13 of the mounting board 10 generate heat due to their own internal resistance and current flowing through the circuit. Heat generated by the first electrical component 11 is transferred to the heat sink 12 .
  • the heat sink 12 receives air generated by the rotation of the blower fan 3, so that the first electrical component 11 can be cooled with a greater cooling effect than natural air cooling.
  • the heat generated by the second electrical component 13 is transferred from the mounting board 10 to the heat conducting insulating material 14 and the holding sheet metal 16 through the heat conducting insulating material 14 thermally coupled to the mounting board 10 and the holding sheet metal 16 . Since the holding sheet metal 16 is exposed to the blower chamber 4, the holding sheet metal 16 receives the wind generated by the rotation of the blower fan 3, thereby cooling the second electric component with a greater cooling effect.
  • the mounting board 10 When the mounting board 10 needs to be removed or attached due to the failure of the first electrical component 11 or the second electrical component 13, the screw 15 for fixing the heat sink 12 and the partition plate 6, the heat sink 12 and the first electrical component 4.
  • the screws 18 for fixing the mounting plate 11 and the screws 19 for fixing the partition plate 6 and the holding plate 16 are removed, the mounting board 10 is in the state shown in FIG.
  • the mounting board 10 can be removed and attached while the thermally conductive insulating material 14 is fixed to the mounting board 10, the trouble of positioning the thermally conductive insulating material 14 and the presence or absence of the thermally conductive insulating material 14 as a service component can be eliminated. There are no problems such as confirmation, forgetting to attach, or loss due to dropping. This reduces the load on users and maintenance companies and improves serviceability.
  • heat-resistant non-silicon resin (acrylic resin, etc.) is desirable for the heat-conducting insulating material 14 . This is because although silicon-based resins are excellent in heat resistance, there is concern about poor contact due to generation of siloxane gas due to a high heat load.
  • the holding sheet metal 16 is provided with a housing portion 16a for housing the heat-conducting insulating material 14 on the surface facing the first mounting surface 10a. With such a configuration, the heat-conducting insulating material 14 can be reliably held by the holding sheet metal 16 .
  • the storage portion 16 a is located between the partition plate 6 and the mounting substrate 10 when the mounting substrate 10 is fixed to the partition plate 6 . That is, the storage portion 16a is positioned on the machine room 5 side. Moreover, the side surface of the storage portion 16a is open, and a portion of the heat-conducting insulating material 14 is exposed to the outside through the opening. With such a configuration, the heat dissipation from the heat-conducting insulating material 14 can be promoted by the opening on the side of the machine room 5 that is not directly exposed to the wind of the blower fan 3 .
  • the thermally conductive insulating material 14 is attached in order to increase the cooling effect of the second electrical component 13, and when the mounting substrate 10 is removed and attached for service, the thermally conductive insulating material 14 is not attached or the position of the thermally conductive insulating material 14 is removed.
  • the heat-conducting insulating material 14 is held on the mounting substrate 10 so that the mounting substrate alone (in the state of a service substrate) does not need to worry about deviation.
  • a hole 6b is formed in the portion of the partition plate where the holding sheet metal 16 contacts, and the holding sheet metal 16 is exposed to the blower chamber 4, thereby enhancing the cooling effect.
  • Embodiment 2 will be described in order to increase the number. Configurations similar to those of the above-described embodiment are denoted by similar reference numerals, and detailed description thereof is omitted.
  • FIG. 5 is a cross-sectional view of the mounting substrate and its surroundings in Embodiment 2, and is a view corresponding to a partially enlarged cross-sectional view of the portion A shown in FIG.
  • the partition plate 6 does not have an opening like the hole 6b in the first embodiment.
  • the holding structure of the heat-conducting insulating material 14 is changed so that the heat-conducting insulating material 14 is directly in contact with the partition plate 6, while the heat-conducting insulating material 14 is fixed to the first mounting surface 10a of the mounting board 10.
  • a holding clamper (fixing tool) 17 is used to fix the heat-conducting insulating material 14 to the mounting substrate 10 .
  • the holding clamper 17 is in contact with and thermally coupled with the partition plate 6 .
  • FIG. 6 is a diagram showing an example of the shape of the heat-conducting insulating material according to the second embodiment. A dotted line area in the center of the heat-conducting insulating material 14 in FIG.
  • FIG. 7 is a diagram showing an example of the shape of a holding clamper according to Embodiment 2.
  • FIG. FIG. 8 is a diagram showing an example of a shape in which the holding clamper is mounted on the mounting board and the heat-conducting insulating material.
  • the thermal conductive insulating material 14 is fixed by the upper spring structure portion 17a of the holding clamper 17 shown in FIG. can be fixed to the mounting board 10 .
  • the spring structure portion 17a abuts on the thermally conductive insulating material 14 and bends, and fixes the thermally conductive insulating material 14 by its restoring force.
  • the bending portion 17c contacts the mounting board 10 and bends, and the mounting board 10 is fixed by its restoring force. Further, the heat conductive insulating material 14 is fixed to the mounting board 10 by the holding clamper 17, and when the mounting board 10 is attached to the partition plate 6, the heat conductive insulating material 14 comes into contact with the partition plate 6 at a convex position. Positional relationship.
  • the heat generated by the second electrical component 13 is transferred from the mounting board 10 to the heat-conducting insulating material 14 thermally coupled to the mounting board 10 and the partition plate 6 . 14. Since it is transmitted to the partition plate 6, it can be cooled with a greater cooling effect than the second electrical component 13 by utilizing the flow of air in the blower chamber 4.
  • the screw 15 fixing the heat sink 12 and the partition plate 6 and the screw 18 fixing the heat sink 12 and the first electric component 11 can be removed. Since the mounting board 10 can be removed and attached while the thermal conductive insulating material 14 is fixed by the holding clamper 17, as in the first embodiment, the trouble of positioning the thermal conductive insulating material 14, There are no problems such as confirmation of the presence or absence of the heat-conducting insulating material 14 as a service part, forgetting to attach it, or loss, and the burden on users and maintenance companies is reduced, and serviceability is improved.
  • the second embodiment unlike the first embodiment, it is not necessary to form the hole 6b in the partition plate 6 to expose the holding metal plate 16 to the blower chamber 4. Therefore, water and dust can enter from the blower chamber 4. can be suppressed, and the improvement of waterproofness and dustproofness can be achieved.
  • the holding clamper 17 is also made of an insulating material (resin or the like) and may have any shape as long as it can hold the thermally conductive insulating material 14 and fix it to the mounting board 10 .
  • FIG. 9 is a cross-sectional view of the mounting substrate and its surroundings in Embodiment 3, and is a view corresponding to a partially enlarged cross-sectional view of the portion A shown in FIG. Configurations similar to those of the above-described embodiment are denoted by similar reference numerals, and detailed description thereof is omitted.
  • the second electrical component 13 is mounted on the first mounting surface 10a in the same manner as the first electrical component 11.
  • the second electrical component 13 is surrounded by the storage portion 16 a of the holding sheet metal 16 and covered with the heat-conducting insulating material 14 .
  • heat is directly transmitted from the second electrical component 13 to the heat-conducting insulating material 14, so the heat dissipation performance is further improved.
  • FIG. 10 is a cross-sectional view of the mounting substrate and its surroundings in Embodiment 4, and is a view corresponding to a partially enlarged cross-sectional view of the portion A shown in FIG. Configurations similar to those of the above-described embodiment are denoted by similar reference numerals, and detailed description thereof is omitted.
  • the base 12 a of the heat sink 12 is formed to have a size facing the holding metal plate 16 , and the holding metal plate 16 is fixed to the heat sink 12 instead of the partition plate 6 .
  • the heat generated by the second electrical component 13 is finally cooled by using the blower fan 3 in the blower chamber 4 through the partition plate 6, but in the configuration of Embodiment 4, the second electrical component The heat generated by 13 is finally cooled by the outside air fan 3 of the blower chamber 4 via the heat sink 12. If the thermal design of the first electric component 11 is feasible, this structure is preferable. The cooling performance of the second electrical component 13 is improved.
  • FIG. 11 is a cross-sectional view of the mounting board and its surroundings in Embodiment 5, and is a view corresponding to a partially enlarged cross-sectional view of the portion A shown in FIG.
  • Components similar to those of the above-described embodiment are denoted by similar reference numerals, and detailed description thereof will be omitted.
  • the second electrical component 13 is mounted on the first mounting surface 10a. Also, the heat-conducting insulating material 14 is fixed to the first mounting surface 10 a of the mounting substrate 10 by a holding clamper 17 . The second electrical component 13 is also covered with a thermally conductive insulating material 14 . Also, the heat-conducting insulating material 14 is in contact with the partition plate 6 and is thermally coupled thereto.
  • the mounting surface of the second electrical component 13 is changed from the configuration of the second embodiment to the partition plate 6 side.
  • the second electrical component 13 can be cooled.
  • the substrate can be removed and attached while the thermal conductive insulating material 14 is fixed to the mounting substrate 10 . Since a hole is not formed in the partition plate 6 for the second electrical component 13, water and dust are less likely to enter from the blower chamber 4, thereby improving waterproofness and dustproofness.
  • the second electrical component 13 is in direct contact with the heat-conducting insulating material 14, so the cooling performance of the second electrical component 13 is improved compared to the second embodiment.
  • FIG. 12 is a cross-sectional view of the mounting board and its surroundings in Embodiment 6, and is a view corresponding to a partially enlarged cross-sectional view of the portion A shown in FIG.
  • Components similar to those of the above-described embodiment are denoted by similar reference numerals, and detailed description thereof will be omitted.
  • Embodiment 6 projecting portions 6c having an L-shaped cross section are provided above and below the hole 6b of the partition plate 6. As shown in FIG. A protrusion 16b of the holding metal plate 16 is fitted in the groove formed by the protrusion 6c.
  • the mounting substrate 10 is slid onto the L-shaped protruding portion provided on the partition plate 6 to determine the position, and the mounting substrate 10 and the partition plate 6, and the heat sink 12 and the first electric component 11 are fixed with screws 18. 10 is fixed to the partition plate 6 . Even before the first electric component 11 is fixed to the heat sink 12, once the protrusion 16b of the holding sheet metal 16 is fitted into the groove formed by the protrusion 6c, the operator can release the mounting substrate 10 and Since the mounting board 10 does not drop even when the mounting board 10 is removed, the workability of mounting the mounting board is improved.
  • a hole 6b is formed in the holding sheet metal 16 on the blower chamber 4 side so that the cooling effect of the blower fan 3 can be fully exhibited. A structure that closes the opening may be employed.
  • the holding metal plate 16 is fixed to the partition plate 6 without being screwed to the partition plate 6 from the configuration of the first embodiment, the attachment of the mounting substrate 10, Easier to remove.
  • the configuration shown in the above embodiment shows an example of the content of the present disclosure.
  • the configuration of the embodiment can be combined with another known technique. A part of the configuration of the embodiment can be omitted or changed without departing from the gist of the present disclosure.

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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)

Abstract

L'invention concerne une unité extérieure comprenant : un boîtier ; une plaque de séparation (6) qui divise l'intérieur du boîtier en une salle de soufflerie et une salle des machines ; une plaque de montage (10) qui présente une première surface de montage (10a) sur laquelle est monté un premier composant électrique (11) et une seconde surface de montage (10b) sur laquelle est monté un deuxième composant électrique (13), et qui est fournie dans la salle des machines de telle sorte que la première surface de montage (10a) fait face à la plaque de séparation (6) ; un dissipateur thermique (12) qui est attaché au premier composant électrique (11) et fixé à la plaque de séparation (6) ; une tôle de maintien (16) placée à un endroit qui recouvre le second composant électrique (13) vu d'une direction perpendiculaire à la première surface de montage (10a), fixée à la première surface de montage (10a) et également fixée au dissipateur thermique (12) ou à la plaque de séparation (6) ; et un matériau isolant thermoconducteur (14) placé à un endroit qui recouvre le second composant électrique (13) vu d'une direction perpendiculaire à la première surface de montage (10a) et qui vient en butée sur la première surface de montage (10a). Le matériau isolant thermoconducteur (14) est logé dans une partie de stockage (16a) formée dans la tôle de maintien (16).
PCT/JP2022/006193 2022-02-16 2022-02-16 Unité extérieure WO2023157129A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2022/006193 WO2023157129A1 (fr) 2022-02-16 2022-02-16 Unité extérieure
JP2024500771A JPWO2023157129A1 (fr) 2022-02-16 2022-02-16

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2022/006193 WO2023157129A1 (fr) 2022-02-16 2022-02-16 Unité extérieure

Publications (1)

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WO2023157129A1 true WO2023157129A1 (fr) 2023-08-24

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PCT/JP2022/006193 WO2023157129A1 (fr) 2022-02-16 2022-02-16 Unité extérieure

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JP (1) JPWO2023157129A1 (fr)
WO (1) WO2023157129A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008121966A (ja) * 2006-11-10 2008-05-29 Daikin Ind Ltd 空気調和機の室外機
JP2012233614A (ja) * 2011-04-28 2012-11-29 Sanyo Electric Co Ltd 空気調和装置の室外ユニット
WO2016147345A1 (fr) * 2015-03-18 2016-09-22 株式会社テーケィアール Module d'alimentation électrique et unité extérieure de climatiseur l'utilisant
US20210041116A1 (en) * 2018-01-26 2021-02-11 Samsung Electronics Co., Ltd. Outdoor unit of air conditioner
CN112432256A (zh) * 2020-11-30 2021-03-02 珠海格力电器股份有限公司 控制电路板、电器盒、空调系统及其控制方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008121966A (ja) * 2006-11-10 2008-05-29 Daikin Ind Ltd 空気調和機の室外機
JP2012233614A (ja) * 2011-04-28 2012-11-29 Sanyo Electric Co Ltd 空気調和装置の室外ユニット
WO2016147345A1 (fr) * 2015-03-18 2016-09-22 株式会社テーケィアール Module d'alimentation électrique et unité extérieure de climatiseur l'utilisant
US20210041116A1 (en) * 2018-01-26 2021-02-11 Samsung Electronics Co., Ltd. Outdoor unit of air conditioner
CN112432256A (zh) * 2020-11-30 2021-03-02 珠海格力电器股份有限公司 控制电路板、电器盒、空调系统及其控制方法

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