WO2023112987A1 - Dispositif à cycle frigorifique - Google Patents

Dispositif à cycle frigorifique Download PDF

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Publication number
WO2023112987A1
WO2023112987A1 PCT/JP2022/046212 JP2022046212W WO2023112987A1 WO 2023112987 A1 WO2023112987 A1 WO 2023112987A1 JP 2022046212 W JP2022046212 W JP 2022046212W WO 2023112987 A1 WO2023112987 A1 WO 2023112987A1
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WO
WIPO (PCT)
Prior art keywords
refrigeration cycle
substrate
heat
casing
cycle apparatus
Prior art date
Application number
PCT/JP2022/046212
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English (en)
Japanese (ja)
Inventor
仁 大久保
秀彦 片岡
元輝 高木
崇 丹波
Original Assignee
ダイキン工業株式会社
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Filing date
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Application filed by ダイキン工業株式会社 filed Critical ダイキン工業株式会社
Publication of WO2023112987A1 publication Critical patent/WO2023112987A1/fr

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    • 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
    • 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 a refrigeration cycle device.
  • Patent Document 1 discloses an air conditioner that cools high-heat-generating components mounted on a control board of the electrical component unit by blowing outside air sucked from an outside air intake port to an electrical component unit arranged in a fan chamber.
  • An outdoor unit of the machine is disclosed.
  • Patent Document 1 for example, if a highly combustible refrigerant such as propane is used, there is a risk that a high-heat-generating component may become an ignition source.
  • the purpose of the present disclosure is to reduce the risk of ignition caused by electrical equipment as an ignition source, even if a flammable refrigerant leaks from refrigerant piping.
  • a first aspect of the present disclosure includes a main body casing (30), a partition member (31) that partitions the inside of the main body casing (30) into a machine room (32) and a blower room (33), and the machine room ( 32), and a blower (22) arranged in the blower chamber (33), wherein the machine chamber (32) includes the compressor (24) and the blower (22).
  • a refrigerant pipe (26) through which a combustible refrigerant flows is arranged to be connected to the air conditioner (24), and electrical equipment (40) is arranged in the air blower chamber (33). It includes a substrate (42) on which a component (41) is mounted, and a sealing member (45) that seals the substrate (42).
  • the electrical component (40) by sealing the substrate (42) of the electrical component (40) and isolating it from the machine room (32), even if the flammable refrigerant leaks from the refrigerant pipe (26), the electrical component (40) ) can be reduced as an ignition source.
  • a second aspect of the present disclosure is the refrigeration cycle apparatus of the first aspect, wherein the sealing member (45) is a substrate casing (50) having an accommodation space (52) for accommodating the substrate (42).
  • the substrate (42) can be hermetically sealed by housing the substrate (42) in the substrate casing (50).
  • a third aspect of the present disclosure is the refrigeration cycle apparatus of the second aspect, wherein a heat exchanger (21) having a plurality of stages of heat transfer tubes (21b) is arranged in the blower chamber (33), and the substrate
  • the casing (50) comprises a first member (51) having an opening (53) communicating with the accommodation space (52), and closing the opening (53) by contacting the first member (51).
  • the leaked refrigerant flows into the accommodation space (52) through the contact portion between the first member (51) and the second member (55). You can prevent the influx.
  • a fourth aspect of the present disclosure is the refrigeration cycle apparatus according to the third aspect, wherein the first member (51) includes a flange portion (54) projecting outward along the peripheral edge portion of the opening (53). ) is provided, and the second member (55) is attached to the flange portion (54), and the flange portion (54) is placed on the fins (21a) of the heat exchanger (21).
  • the fourth aspect even if the flammable refrigerant leaks from the heat transfer pipe (21b), it is possible to prevent the leaked refrigerant from flowing into the accommodation space (52) through the overlapping surfaces of the flange portion (54). can. Further, by placing the flange portion (54) on the fins (21a), it becomes easier to adjust the height position of the substrate casing (50).
  • the sealing member (45) is a coating material (70) covering the entire surface of the substrate (42).
  • the substrate (42) can be sealed by covering the entire surface of the substrate (42) with the coating material (70).
  • a sixth aspect of the present disclosure is the refrigeration cycle apparatus of any one of the first to fifth aspects, wherein the blower chamber (33) includes a heat exchanger (21) having a plurality of stages of heat transfer tubes (21b). is arranged, and the substrate (42) is arranged above the uppermost heat transfer tube (21b) among the plurality of heat transfer tubes (21b).
  • the blower chamber (33) includes a heat exchanger (21) having a plurality of stages of heat transfer tubes (21b). is arranged, and the substrate (42) is arranged above the uppermost heat transfer tube (21b) among the plurality of heat transfer tubes (21b).
  • the leaked refrigerant can be prevented from flowing toward the substrate (42).
  • a seventh aspect of the present disclosure is a refrigeration cycle apparatus according to any one of the first to sixth aspects, comprising: a working fluid flow path (61) through which a working fluid flows; and a condensing section (63) for condensing the working fluid, wherein in the working fluid flow path (61), the evaporating section (62) and the condensing section (63) In the evaporating section (62), heat is exchanged between the heat-generating component (41) and the working fluid, and in the condensing section (63), the working fluid flows through the refrigerant pipe (26). Heat is exchanged between the combustible refrigerant and the working fluid.
  • heat is exchanged between the combustible refrigerant flowing through the refrigerant pipe (26) and the working fluid at a position away from the heat-generating component (41), thereby reducing the risk of ignition of the combustible refrigerant. , can cool the heat-generating component (41).
  • An eighth aspect of the present disclosure is the refrigeration cycle apparatus of any one of the first to seventh aspects, comprising a blower support base (34) for supporting the blower (22), wherein the blower support base (34) is provided with an electrical component support base (37) for supporting the electrical component (40).
  • the support column portion of the support base can be shared to save space.
  • a ninth aspect of the present disclosure is the refrigeration cycle apparatus according to any one of the first to eighth aspects, wherein the sealing member (45) is a substrate casing having an accommodation space (52) that accommodates the substrate (42). (50), and a heat dissipation space (38) for dissipating heat generated by the heat generating component (41) is provided between the top plate of the main body casing (30) and the upper surface of the substrate casing (50). be done.
  • the sealing member (45) is a substrate casing having an accommodation space (52) that accommodates the substrate (42). (50), and a heat dissipation space (38) for dissipating heat generated by the heat generating component (41) is provided between the top plate of the main body casing (30) and the upper surface of the substrate casing (50).
  • the heat generated by the heat-generating component (41) is radiated to the heat-dissipating space (38), thereby preventing the heat from accumulating around the electrical component (40).
  • the electrical component (40) is arranged apart from the partition member (31).
  • the electrical component (40) can be arranged further away from the refrigerant pipe (26).
  • An eleventh aspect of the present disclosure is the refrigeration cycle device according to any one of the first to tenth aspects, wherein the combustible refrigerant is R290.
  • a twelfth aspect of the present disclosure is the refrigeration cycle apparatus of the second aspect, wherein the substrate casing (50) includes a first member (51) having an opening (53) communicating with the accommodation space (52), and and a second member (55) that seals the housing space (52) from the outside of the substrate casing (50) by contacting the first member (51) and blocking the opening (53).
  • the substrate (42) is disposed on the surface of the interior of the first member (51) opposite to the opening (53), and the substrate casing (50) includes the second member ( 55) is arranged in the blower chamber (33) in a posture positioned below the first member (51).
  • the cooling medium is positioned away from the opening (53).
  • the refrigerant is less likely to come into contact with the substrate (42), and the risk of ignition caused by the electrical component (40) of the substrate (42) as an ignition source can be reduced.
  • the electrical wiring (47) is led out from the substrate (42), ) is formed with a wiring hole (66) through which the electric wiring (47) is pulled out of the substrate casing (50).
  • the wiring hole (66) is formed in the side wall of the first member (51) at a position below the substrate (42), so that the coolant that has flowed into the substrate casing (50) is It becomes easier to discharge to the outside of the substrate casing (50) through the wiring hole (66). This can prevent the refrigerant from staying in the accommodation space (52).
  • a fourteenth aspect of the present disclosure is the refrigeration cycle apparatus of the thirteenth aspect, wherein a plurality of the electric wires (47) are provided, a plurality of the wiring holes (66) are formed, and the plurality of the electric wires (47 ) are pulled out from the plurality of wiring holes (66) while being bundled in a plurality of groups.
  • the plurality of electrical wirings (47) are divided into a plurality of groups and bundled, so that the plurality of electrical wirings (47) can be connected while maintaining the airtightness of the housing space (52). It is possible to easily perform the connection work for pulling out from the substrate casing (50) and connecting the electrical wiring (47) to each device.
  • FIG. 1 is a refrigerant circuit diagram of a refrigeration cycle apparatus according to this embodiment.
  • FIG. 2 is a cross-sectional plan view showing the configuration of the outdoor unit.
  • FIG. 3 is a front sectional view showing the configuration of the outdoor unit.
  • FIG. 4 is a perspective view showing the configuration of the substrate casing and the cooling device.
  • FIG. 5 is a front cross-sectional view showing the configuration of the substrate casing and the cooling device.
  • FIG. 6 is a front cross-sectional view showing the disassembled structure of the substrate casing.
  • FIG. 7 is a front sectional view showing the configuration of the outdoor unit according to Modification 1.
  • FIG. 8 is a front cross-sectional view showing the configuration of the outdoor unit according to Modification 2.
  • FIG. FIG. 1 is a refrigerant circuit diagram of a refrigeration cycle apparatus according to this embodiment.
  • FIG. 2 is a cross-sectional plan view showing the configuration of the outdoor unit.
  • FIG. 3 is a front sectional view showing the
  • FIG. 9 is a front sectional view showing the configuration of an outdoor unit according to Modification 3.
  • FIG. 10 is a view of a state in which a plurality of electrical wirings are grouped, viewed from the opening side.
  • FIG. 11 is a refrigerant circuit diagram of a refrigeration cycle device according to another embodiment.
  • the refrigeration cycle device (1) is an air conditioner.
  • a refrigeration cycle device (1) has a refrigerant circuit (5).
  • the refrigerant circuit (5) is filled with a combustible natural refrigerant.
  • the refrigerant circuit (5) performs a refrigeration cycle by circulating refrigerant.
  • propane which is a highly flammable natural refrigerant, is used as the refrigerant.
  • Natural refrigerants have zero ozone depletion potential, low global warming potential, and low environmental impact. Propane ignites below 500°C.
  • the combustible refrigerant filled in the refrigerant circuit (5) may be other than propane.
  • ammonia (R717) which is a natural refrigerant, may be used as the combustible refrigerant with which the refrigerant circuit (5) is filled.
  • methane (R50), ethane (R170), butane (R600), and isobutane (R600a), which are highly flammable natural refrigerants, may be used as the combustible refrigerant to be filled in the refrigerant circuit (5).
  • a refrigeration cycle device (1) has an indoor unit (10) and an outdoor unit (20).
  • the indoor unit (10) is installed indoors.
  • the outdoor unit (20) is installed outdoors.
  • the indoor unit (10) and the outdoor unit (20) are connected to each other by a gas pipe (6) and a liquid pipe (7).
  • a gas shutoff valve (8) is connected to the gas pipe (6).
  • a liquid closing valve (9) is connected to the liquid pipe (7).
  • the indoor unit (10) has an indoor heat exchanger (11) and an indoor fan (12).
  • the indoor heat exchanger (11) is composed of, for example, a cross-fin type fin-and-tube heat exchanger. In the indoor heat exchanger (11), heat is exchanged between the refrigerant flowing inside the heat transfer tubes and the air blown by the indoor fan (12).
  • the outdoor unit (20) includes an outdoor heat exchanger (21), an outdoor fan (22) as a blower, an outdoor expansion valve (23), a compressor (24), a four-way switching valve (25), an electric a product (40) and a cooling device (60).
  • the outdoor heat exchanger (21), the outdoor expansion valve (23), the compressor (24), and the four-way switching valve (25) are connected by refrigerant piping (26).
  • a combustible refrigerant flows through the refrigerant pipe (26).
  • the outdoor heat exchanger (21) is composed of, for example, a cross-fin type fin-and-tube heat exchanger.
  • the outdoor heat exchanger (21) has a plurality of fins (21a) and heat transfer tubes (21b).
  • the plurality of fins (21a) are arranged at intervals in a direction perpendicular to the air circulation direction.
  • the heat transfer tubes (21b) extend through the fins (21a) in the thickness direction and are folded back at both ends of the outdoor heat exchanger (21), thereby being arranged in a plurality of stages in the vertical direction.
  • the outdoor expansion valve (23) is, for example, an electronic expansion valve.
  • the compressor (24) is, for example, a rotary compressor such as a scroll compressor.
  • the four-way switching valve (25) has a first port (P1), a second port (P2), a third port (P3) and a fourth port (P4).
  • the four-way switching valve (25) is in a state in which the first port (P1) and the second port (P2) are communicated and the third port (P3) and the fourth port (P4) are communicated (see FIG. 1) during cooling operation. state indicated by a solid line).
  • the four-way switching valve (25) communicates between the first port (P1) and the third port (P3) and communicates between the second port (P2) and the fourth port (P4) during heating operation (Fig. 1 state indicated by the dashed line).
  • the outdoor unit (20) has a main body casing (30).
  • arrows indicate directions of up and down, front and back, and left and right. Unless otherwise specified, directions such as up and down will be described according to the directions indicated by these arrows.
  • the body casing (30) is box-shaped.
  • a partition member (31) extending in the front-rear direction is arranged upright inside the body casing (30).
  • the partition member (31) partitions the inside of the body casing (30) into a machine room (32) and a fan room (33).
  • the machine room (32) is a space on the right side of the partition member (31) inside the main body casing (30).
  • a compressor (24), a four-way switching valve (25), and a refrigerant pipe (26) are arranged in the machine room (32).
  • the blower room (33) is a space on the left side of the partition member (31) inside the main body casing (30).
  • An outdoor fan (22), an outdoor heat exchanger (21), and electrical equipment (40) are arranged in the blower room (33).
  • a blower support base (34) is provided in the blower room (33).
  • the blower support (34) has a pair of struts (35), a motor bracket (36), and an electrical component support (37).
  • the pair of pillars (35) are erected in the air blower chamber (33) with an interval left and right.
  • the motor bracket (36) is attached across the pair of struts (35).
  • a fan motor (22a) of the outdoor fan (22) is attached to the motor bracket (36).
  • the electrical component support base (37) is located above the outdoor fan (22) and protrudes forward from the pair of pillars (35).
  • the electrical component (40) is placed and supported on the electrical component support base (37).
  • the electrical equipment (40) is arranged away from the partition member (31).
  • a suction port (30a) communicating with the blower chamber (33) is formed in the rear wall and the left side wall of the main body casing (30). By driving the outdoor fan (22), outside air is sucked into the blower chamber (33) through the suction port (30a).
  • An outlet (30b) communicating with the fan chamber (33) is formed in the front wall of the main body casing (30). By driving the outdoor fan (22), the air in the blower room (33) is blown out from the outlet (30b).
  • the electrical component (40) constitutes a power conversion device for supplying power to the motor of the compressor (24).
  • the electrical equipment (40) has a heat-generating component (41), a substrate (42), and a sealing member (45).
  • a sealing member (45) seals the substrate (42).
  • the sealing member (45) consists of a substrate casing (50) having an accommodation space (52) therein.
  • the heat generating component (41) is mounted on the substrate (42).
  • the heat-generating component (41) is a switching element (eg, IGBT or MOSFET) of an inverter circuit (not shown).
  • the heat-generating component (41) is a component that generates a large amount of heat during operation of the compressor (24). Therefore, in order to operate the refrigerating cycle device (1) normally, it is necessary to cool the heat generating component (41) so as not to exceed the operable temperature (for example, 90°C).
  • the heat-generating component (41) is cooled by the cooling device (60), which will be described later in detail.
  • the substrate (42) is mounted with an electrical component (43) such as a capacitor in addition to the heat-generating component (41).
  • the substrate (42) is accommodated in the accommodation space (52) of the substrate casing (50).
  • the substrate casing (50) has a first member (51) and a second member (55).
  • the first member (51) has an opening (53) communicating with the accommodation space (52).
  • the first member (51) is formed in a box shape with an upper opening, and the opening (53) is an upper opening of the first member (51).
  • a right side wall of the first member (51) is partially cut out.
  • a later-described heat pipe (61) of the cooling device (60) is drawn out of the substrate casing (50) through a notch in the first member (51).
  • the first member (51) has a flange portion (54).
  • the flange (54) protrudes outward along the periphery of the opening (53).
  • the first member (51) includes a first sealing member (57) and a second sealing member (58).
  • the first seal member (57) is integrally formed with a portion extending along the upper surface of the flange portion (54) and a portion covering the cutout portion of the right side wall of the first member (51).
  • the first sealing member (57) is arranged above the heat pipe (61).
  • the second sealing member (58) is arranged so as to close the cutout portion of the right side wall of the first member (51).
  • the second sealing member (58) is arranged below the heat pipe (61).
  • the heat pipe (61) is sandwiched between the first sealing member (57) and the second sealing member (58).
  • the electrical wiring (47) (see FIG. 4) drawn out from the substrate (42) is similarly sandwiched between the first sealing member (57) and the second sealing member (58).
  • the second member (55) has a box shape with an open bottom and is arranged to cover the flange (54) of the first member (51) from above.
  • the second member (55) is attached to the first member (51) and closes the opening (53).
  • a substrate (42) is attached to the bottom surface of the second member (55).
  • the first member (51) and the second member (55) are attached, for example, by fastening the four corners of the flange (54) with screws (see Fig. 4).
  • a first seal member (57) is sandwiched between the flange portion (54) of the first member (51) and the second member (55) for sealing.
  • the substrate (42) is arranged in a sealed state in the accommodation space (52) of the substrate casing (50).
  • the state in which the substrate (42) is sealed is a state in which the waterproof standard is IPX4 or higher, preferably IPX6 or higher.
  • the substrate (42) is arranged above the uppermost heat transfer tube (21b) among the plurality of heat transfer tubes (21b). Accordingly, even if the flammable refrigerant leaks from the heat transfer tube (21b), the leaked refrigerant can be prevented from flowing toward the substrate (42) because propane, which is a flammable refrigerant, is heavier than air.
  • the contact portion between the first member (51) and the second member (55) is arranged above the uppermost heat transfer tube (21b) among the plurality of heat transfer tubes (21b).
  • the overlapping surface between the flange portion (54) of the first member (51) and the second member (55) are arranged above the uppermost heat transfer tube (21b).
  • a heat dissipation space (38) for dissipating heat generated by the heat generating component (41) is provided between the top plate of the main body casing (30) and the upper surface of the substrate casing (50). As a result, the heat generated by the heat-generating component (41) is radiated to the heat-dissipating space (38), thereby preventing the heat from accumulating around the electrical component (40).
  • the cooling device (60) includes a plurality of heat pipes (61) as working fluid flow paths, a heat sink (62) as an evaporator, a refrigerant jacket (63) as a condenser, have
  • a working fluid is enclosed in the heat pipe (61).
  • the working fluid for example, water whose boiling point is lowered by lowering the pressure is used.
  • lithium, naphthalene, methanol, ammonia, or the like may be used as the working fluid.
  • the heat pipe (61) penetrates the partition member (31) and extends across the fan room (33) and the machine room (32). Inside the heat pipe (61), the working fluid circulates between the heat sink (62) and the coolant jacket (63).
  • An inclined portion (61a) is provided in the middle of the flow path of the heat pipe (61). The inclined portion (61a) extends obliquely upward from the heat sink (62) side toward the refrigerant jacket (63) side.
  • the heat sink (62) is made of, for example, a metal material such as aluminum.
  • a heat sink (62) is arranged in the fan chamber (33). Specifically, the heat sink (62) is placed in close contact with the heat-generating component (41) inside the substrate casing (50).
  • the heat pipe (61) is arranged in close contact with the heat sink (62). As a result, heat is exchanged between the heat-generating component (41) and the working fluid via the heat sink (62), and the working fluid evaporates. The evaporated working fluid flows within the heat pipe (61) toward the refrigerant jacket (63).
  • the refrigerant jacket (63) is made of a metal material such as aluminum, for example.
  • the refrigerant jacket (63) is arranged inside the machine room (32).
  • a plurality of heat pipes (61) are arranged in close contact with the upper portion of the coolant jacket (63).
  • the refrigerant pipe (26) is arranged in close contact with the lower portion of the refrigerant jacket (63).
  • the liquid pipe (7) is used for the refrigerant pipe (26).
  • the cooling device (60) heat is exchanged between the combustible refrigerant flowing through the refrigerant pipe (26) and the working fluid at a position away from the heat generating component (41).
  • the heat-generating component (41) can be cooled while reducing the risk of ignition of the flammable refrigerant.
  • Embodiment - Effects of Embodiment - According to the feature of the present embodiment, by sealing the circuit board (42) of the electrical component (40) and isolating it from the machine room (32), even if the flammable refrigerant leaks from the refrigerant pipe (26), It is possible to reduce the risk of ignition with the product (40) as an ignition source.
  • the substrate (42) can be hermetically sealed by housing the substrate (42) in the substrate casing (50).
  • the contact portion between the first member (51) and the second member (55) is arranged above the uppermost heat transfer tube (21b) among the plurality of heat transfer tubes (21b). be done. Therefore, even if the flammable refrigerant leaks from the heat transfer tube (21b), the leaked refrigerant is prevented from flowing into the accommodation space (52) through the contact portion between the first member (51) and the second member (55). can be suppressed.
  • the substrate (42) is arranged above the uppermost heat transfer tube (21b) among the plurality of heat transfer tubes (21b). Therefore, even if the flammable refrigerant leaks from the heat transfer tube (21b), the leaked refrigerant can be prevented from flowing toward the substrate (42).
  • the working fluid flow path (61) circulates the working fluid between the evaporator (62) and the condenser (63), and the evaporator (62) circulates the heat-generating component (41 ) is heat-exchanged with the working fluid, and in the condensation section (63), heat is exchanged between the combustible refrigerant flowing through the refrigerant pipe (26) and the working fluid. Therefore, by exchanging heat between the combustible refrigerant flowing through the refrigerant pipe (26) and the working fluid at a position away from the heat-generating component (41), the risk of ignition of the combustible refrigerant is reduced, and the heat-generating components (41) 41) can be cooled.
  • the electrical component support base (37) on the blower support base (34) it is possible to standardize the support column portion of the support base and save space.
  • the heat radiation space (38) is provided between the top plate of the body casing (30) and the upper surface of the substrate casing (50). Therefore, the heat generated by the heat-generating component (41) is radiated to the heat-dissipating space (38), thereby preventing the heat from accumulating around the electrical component (40).
  • the electrical equipment (40) is arranged apart from the partition member (31). Therefore, the electrical component (40) can be arranged further away from the refrigerant pipe (26).
  • the substrate casing (50) has a first member (51) and a second member (55).
  • the first member (51) has a flange portion (54).
  • the flange (54) protrudes outward along the periphery of the opening (53).
  • the second member (55) is attached to the flange portion (54) of the first member (51) to close the opening (53).
  • the board (42) is housed in the housing space (52) of the board casing (50).
  • the flange portion (54) of the substrate casing (50) is placed on the fins (21a) of the outdoor heat exchanger (21). Therefore, the overlapping surface between the flange portion (54) of the first member (51) and the second member (55) (more precisely, the overlapping surface between the flange portion (54) and the first sealing member (57) ) is located above the uppermost heat transfer tube (21b) of the outdoor heat exchanger (21).
  • the electrical component (40) has a heat-generating component (41), a substrate (42), and a sealing member (45).
  • a sealing member (45) seals the substrate (42).
  • the sealing member (45) consists of a coating material (70) covering the entire surface of the substrate (42).
  • the coating material (70) is made of, for example, a resin material. Also, in the example shown in FIG. 8, a portion of the heat pipe (61) and the heat sink (62) are similarly covered with the coating material (70).
  • the substrate (42) can be sealed. As a result, even if the flammable refrigerant leaks from the refrigerant pipe (26), it is possible to reduce the risk of ignition caused by the electrical component (40) as an ignition source.
  • the coating material (70) also covers the heat-generating component (41), the substrate (42), the electrical component (43), part of the heat pipe (61), and the heat sink (62). Therefore, heat conduction is promoted through the coating material (70) to the electrical component (43) other than the heat-generating component (41), which is in close contact with the heat sink (62), and a cooling effect can be obtained.
  • the entire surface of the substrate (42) including the heat-generating component (41), part of the heat pipe (61), and the heat sink (62) are covered with the coating material (70).
  • the coating material (70) it is not limited to this form. Specifically, in order to reduce the risk of ignition caused by the electrical equipment (40) as an ignition source, the entire surface of the substrate (42) including at least the heat-generating parts (41) is covered with the coating material (70). All you have to do is
  • the substrate casing (50) has a first member (51) and a second member (55).
  • the first member (51) has an opening (53) communicating with the accommodation space (52).
  • the first member (51) is formed in a box shape with an open bottom, and the opening (53) is a downward opening of the first member (51).
  • a part of the right side wall of the first member (51) is notched.
  • the heat pipe (61) of the cooling device (60) and the electric wiring (47) of the substrate (42) are led out of the substrate casing (50) through the notch of the first member (51).
  • the first member (51) has a flange portion (54).
  • the flange (54) protrudes outward along the periphery of the opening (53).
  • a sealing member (65) is provided on the first member (51).
  • the seal member (65) is arranged to close the cutout portion of the right side wall of the first member (51).
  • the sealing member (65) is formed with a hole for the heat pipe (61) and a wiring hole (66) for the electrical wiring (47).
  • the second member (55) is shaped like a box with an upper opening, and is arranged to cover the flange (54) of the first member (51) from below.
  • the second member (55) seals the housing space (52) from the outside of the substrate casing (50) by contacting the first member (51) and blocking the opening (53).
  • the substrate (42) is arranged on the surface opposite to the opening (53) inside the first member (51). That is, the substrate (42) is arranged on the bottom side (upper side in FIG. 9) of the box-shaped first member (51).
  • the substrate casing (50) is arranged in the blower chamber (33) with the second member (55) positioned below the first member (51).
  • the substrate (42) placed away from the opening (53) is less likely to come into contact with the refrigerant, thereby reducing the risk of ignition caused by the electrical component (40) of the substrate (42) as an ignition source.
  • a sealing member (65) forming part of the side wall of the first member (51) is formed with a hole through which the heat pipe (61) is inserted and a wiring hole (66) through which the electrical wiring (47) is inserted. be done.
  • a plurality of electric wirings (47) are provided.
  • a plurality of wiring holes (66) are formed.
  • a protective tube (48) is arranged in the wiring hole (66).
  • a protective tube (48) protects the electrical wiring (47).
  • the electric wiring (47) passes through the protective tube (48) and is led out of the substrate casing (50).
  • the wiring hole (66) is formed at a position below the substrate (42) in the sealing member (65).
  • the inside of the substrate casing (50) can be formed below the substrate (42) in the sealing member (65) forming the side wall of the first member (51) in this manner, the inside of the substrate casing (50) can be The coolant that has flowed into the circuit board casing (50) is easily discharged to the outside of the board casing (50) through the wiring hole (66). This can prevent the refrigerant from staying in the accommodation space (52).
  • the plurality of electric wires (47) are pulled out from the plurality of wiring holes (66) while being bundled in a plurality of groups. Specifically, the plurality of electrical wirings (47) are classified into A group, B group, C group, and D group.
  • the high-voltage electrical wiring (47) of the inverter circuit is grouped by bundling it with a binding band (68).
  • Group B by bundling the low current electrical wiring (47) of the control circuit with a binding band (68).
  • the electrical wiring (47) connected to the third terminal (83) for the motor-operated valve coil, the electrical wiring (47) connected to the fourth terminal (84) for the thermistor, and the pressure and the electrical wiring (47) connected to the fifth terminal (85) for the sensor are group B.
  • Group C by bundling the low current electrical wiring (47) of the inverter circuit with a binding band (68).
  • the AC200 series electrical wiring (47) is grouped by bundling it with a binding band (68).
  • the electric wiring (47) connected to the eighth terminal (88) for the electric valve coil, the electric wiring (47) connected to the ninth terminal (89) for the PHE heater, are group D.
  • the plurality of electrical wirings (47) are divided into a plurality of groups and bundled, so that the plurality of electrical wirings (47) can be connected to the substrate casing while the accommodation space (52) is kept airtight. It is possible to easily perform the connection work for pulling out from (50) and connecting the electrical wiring (47) to each device.
  • the refrigeration cycle device (1) has been described as an air conditioner with a single refrigerant circuit, but it is not limited to this form.
  • the refrigeration cycle device (1) has an air conditioner unit (100) and an outdoor unit (20).
  • the outdoor unit (20) has a refrigerant circuit (5).
  • the refrigerant circuit (5) is filled with a combustible natural refrigerant.
  • the refrigerant circuit (5) performs a refrigeration cycle by circulating refrigerant.
  • the air conditioner unit (100) has an air conditioner (106) connected to a fluid circuit (105).
  • a temperature adjusting fluid flows through the fluid circuit (105).
  • the temperature-regulating fluid is, for example, water.
  • the air conditioner (106) is installed in an indoor air-conditioned space.
  • the number of air conditioners (106) is not limited to this, and a plurality of air conditioners (106) may be provided.
  • the air conditioner unit (100) has a valve or the like for individually switching supply/non-supply of the temperature adjusting fluid to the plurality of air conditioners (106). may be provided.
  • a fluid circuit (105) is configured by connecting a water heat exchanger (101), a fluid pump (107), and an air conditioner (106) by a fluid pipe (108).
  • a fluid pump (107) circulates water in the fluid circuit (105).
  • a refrigerant pipe (28) of the refrigerant circuit (5) is connected to the water heat exchanger (101).
  • the water heat exchanger (101) exchanges heat between the combustible refrigerant flowing through the refrigerant pipe (28) and the water flowing through the fluid pipe (108).
  • the four-way switching valve (25) communicates between the first port (P1) and the third port (P3) and communicates between the second port (P2) and the fourth port (P4) (indicated by solid lines in FIG. 11). state).
  • the air conditioner (106) is a heat exchanger that functions as a heat radiator for the temperature adjusting fluid that circulates in the fluid circuit (105).
  • the air conditioner (106) is an example of an object whose temperature is adjusted.
  • the air conditioner (106) is specifically a radiator, a floor cooling/heating panel, or the like.
  • the air conditioner (106) is installed along the wall of the room.
  • the air conditioner (106) is a floor cooling/heating panel, the air conditioner (106) is installed under the floor of the room.
  • the present disclosure is useful for refrigeration cycle devices.
  • Refrigeration cycle device 21 Outdoor heat exchanger (heat exchanger) 21a Fin 21b Heat transfer tube 22 Outdoor fan (blower) 24 Compressor 26 Refrigerant pipe 30 Body casing 31 Partition member 32 Machine room 33 Blower room 34 Blower support 37 Electrical component support 38 Heat dissipation space 40 Electrical component 41 Heat generating component 42 Substrate 45 Sealing member 47 Electrical wiring 50 Substrate casing 51 First Member 52 Housing space 53 Opening 54 Flange 55 Second member 60 Cooling device 61 Heat pipe (working fluid flow path) 62 Heat sink (evaporator) 63 Refrigerant jacket (condenser) 66 Wiring hole 70 Coating material

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Other Air-Conditioning Systems (AREA)

Abstract

L'intérieur d'un carter de corps (30) est divisé en une chambre à machine (32) et une chambre à soufflante (33) à l'aide d'un élément de séparation (31). Un compresseur (24), et une tuyauterie de fluide frigorigène (26) à travers laquelle s'écoule un fluide frigorigène inflammable, sont disposés dans la chambre à machine (32). Un ventilateur extérieur (22) et un composant électrique (40) sont disposés dans la chambre à soufflante (33). Le composant électrique (40) comprend un substrat (42) sur lequel est monté un composant émetteur de chaleur (41), et un élément d'étanchéité hermétique (45) permettant de rendre hermétiquement étanche le substrat (42).
PCT/JP2022/046212 2021-12-15 2022-12-15 Dispositif à cycle frigorifique WO2023112987A1 (fr)

Applications Claiming Priority (2)

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JP2021203047 2021-12-15
JP2021-203047 2021-12-15

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JP (1) JP7332963B2 (fr)
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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10220824A (ja) * 1997-02-03 1998-08-21 Daikin Ind Ltd 可燃性冷媒を用いた空気調和装置
JP2001201110A (ja) * 2000-01-20 2001-07-27 Fujitsu General Ltd 空気調和機の室外機
JP2010014340A (ja) * 2008-07-03 2010-01-21 Daikin Ind Ltd 冷凍装置
JP2010038514A (ja) * 2008-08-08 2010-02-18 Corona Corp ヒートポンプ装置
WO2016006106A1 (fr) * 2014-07-11 2016-01-14 日立アプライアンス株式会社 Unité extérieure de climatiseur
JP2017083148A (ja) 2015-10-30 2017-05-18 ダイキン工業株式会社 空調機の室外ユニット
CN109340929A (zh) * 2018-10-31 2019-02-15 珠海格力电器股份有限公司 制冷设备及其密封盒
WO2019124359A1 (fr) * 2017-12-18 2019-06-27 ダイキン工業株式会社 Climatiseur
WO2020208670A1 (fr) * 2019-04-08 2020-10-15 三菱電機株式会社 Unité d'extérieur pour climatiseur

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10220824A (ja) * 1997-02-03 1998-08-21 Daikin Ind Ltd 可燃性冷媒を用いた空気調和装置
JP2001201110A (ja) * 2000-01-20 2001-07-27 Fujitsu General Ltd 空気調和機の室外機
JP2010014340A (ja) * 2008-07-03 2010-01-21 Daikin Ind Ltd 冷凍装置
JP2010038514A (ja) * 2008-08-08 2010-02-18 Corona Corp ヒートポンプ装置
WO2016006106A1 (fr) * 2014-07-11 2016-01-14 日立アプライアンス株式会社 Unité extérieure de climatiseur
JP2017083148A (ja) 2015-10-30 2017-05-18 ダイキン工業株式会社 空調機の室外ユニット
WO2019124359A1 (fr) * 2017-12-18 2019-06-27 ダイキン工業株式会社 Climatiseur
CN109340929A (zh) * 2018-10-31 2019-02-15 珠海格力电器股份有限公司 制冷设备及其密封盒
WO2020208670A1 (fr) * 2019-04-08 2020-10-15 三菱電機株式会社 Unité d'extérieur pour climatiseur

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JP2023088895A (ja) 2023-06-27

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