EP3745033B1 - Heat pump hot water supply outdoor unit - Google Patents

Heat pump hot water supply outdoor unit Download PDF

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Publication number
EP3745033B1
EP3745033B1 EP18902846.7A EP18902846A EP3745033B1 EP 3745033 B1 EP3745033 B1 EP 3745033B1 EP 18902846 A EP18902846 A EP 18902846A EP 3745033 B1 EP3745033 B1 EP 3745033B1
Authority
EP
European Patent Office
Prior art keywords
compressor
soundproofing material
bottom plate
heat pump
outdoor unit
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.)
Active
Application number
EP18902846.7A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3745033A1 (en
EP3745033A4 (en
Inventor
Daiki FUJITA
Toshiya Yamauchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of EP3745033A1 publication Critical patent/EP3745033A1/en
Publication of EP3745033A4 publication Critical patent/EP3745033A4/en
Application granted granted Critical
Publication of EP3745033B1 publication Critical patent/EP3745033B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D17/00—Domestic hot-water supply systems
    • F24D17/02—Domestic hot-water supply systems using heat pumps
    • 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
    • F24F1/08—Compressors specially adapted for separate outdoor units
    • F24F1/10—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
    • F24F1/08—Compressors specially adapted for separate outdoor units
    • F24F1/12—Vibration or noise prevention 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
    • F24F1/36—Drip trays for outdoor units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24—Means for preventing or suppressing noise
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0096—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater combined with domestic apparatus

Definitions

  • the present invention relates to a heat pump water-heater outdoor unit.
  • a heat pump hot water supply system which uses heat of the air and is excellent in energy efficiency is widely used.
  • a heat pump water-heater outdoor unit of the heat pump hot water supply system an evaporator which causes a refrigerant to absorb the heat of the air, a propeller fan which blows air to the evaporator, a compressor which compresses the refrigerant, and a water-refrigerant heat exchanger which heats water with the compressed refrigerant having high temperature and high pressure are mounted.
  • the periphery of the compressor is covered with a soundproofing material.
  • the compressor is installed on a bottom plate serving as a base of the heat pump water-heater outdoor unit.
  • the soundproofing material includes a substance having water absorption properties such as, e.g., felt.
  • the soundproofing material absorbs the drainage, there is a possibility that the compressor will be corroded by water in the drainage.
  • the soundproofing material absorbs the drainage, there is a possibility that soundproofing properties of the soundproofing material will be degraded. It is preferable to prevent the soundproofing material from coming into contact with the drainage having collected on the bottom plate such that the soundproofing material does not absorb the drainage.
  • a soundproofing material covering the side surface of a compressor includes a sound absorbing material having water absorption properties.
  • a bottom plate on which the compressor is installed has a soundproofing material placement portion on which the soundproofing material is placed, and a surrounding portion which is positioned around the soundproofing material placement portion and is formed integrally with the soundproofing material placement portion.
  • the soundproofing material placement portion is at a position higher than that of the surrounding portion.
  • JP 2011 094 955 A discloses a heat pump type heat source machine unit where a heat insulating material of a soft structure is provided on an upper surface of a base around a compressor, a heat insulating material is wound around the compressor body, and a heat insulating material is placed on an upper part of the compressor, and thus, a sealed space is formed around the compressor. Accordingly, as heat radiation loss from the compressor body is drastically reduced, and the noise from the compressor body is sound-insulated, and the noise is reduced.
  • the outdoor unit in PTL 1 has the following problems. Depending on the situation of an installation environment such as a porch or a berm, there are cases where the outdoor unit is tilted toward the compressor and installed. In these cases, the drainage having flowed down to the bottom plate collects at a corner portion on the compressor side, and the soundproofing material may be thereby soaked in the drainage. When the soundproofing material absorbs water, a problem may arise in that a shell of the compressor is corroded, and a problem may arise in that the soundproofing properties of the soundproofing material are degraded.
  • the present invention has been made in order to solve the above-described problems, and an object thereof is to provide a heat pump water-heater outdoor unit capable of preventing a soundproofing material which covers the side surface of a compressor from absorbing water having collected on a bottom plate irrespective of the situation of an installation environment.
  • a heat pump water-heater outdoor unit includes: a bottom plate having a rectangular bottom surface; a compressor provided on the bottom plate, the compressor compressing a refrigerant; a soundproofing material configured to cover a side surface of the compressor; and a soundproofing material placement portion provided on the bottom plate, the soundproofing material placement portion holding a lower end of the soundproofing material at a position higher than the bottom surface.
  • the soundproofing material placement portion is configured to cover corner portion that is closest to the compressor out of corner portions of the bottom plate and to surround a periphery of the compressor so as to arc.
  • the heat pump water-heater outdoor unit is configured such that the soundproofing material placement portion is placeable on the bottom plate in a state in which the compressor is disposed on the bottom plate.
  • one corner portion that is closest to the compressor out of corner portions of the bottom plate is covered with the soundproofing material placement portion. Consequently, it is possible to prevent the soundproofing material covering the side surface of the compressor from being soaked in drainage which collects at the corner portion. With this, it becomes possible to suppress corrosion of a shell of the compressor and degradation of soundproofing properties irrespective of the situation of the installation environment.
  • the arc-shaped soundproofing material placement portion By providing the arc-shaped soundproofing material placement portion, the following effect can be obtained. Even in a state in which the compressor is fixed to the bottom plate, it is possible to install the soundproofing material placement portion on the bottom plate. With this, it is possible to mount the soundproofing material placement portion irrespective of assembly procedure.
  • FIG. 1 is a view of piping of a heat pump hot water supply system including a heat pump water-heater outdoor unit of Embodiment 1.
  • a heat pump hot water supply system 100 includes a heat pump water-heater outdoor unit 10, and a tank unit 50.
  • the heat pump water-heater outdoor unit 10 is installed outdoors.
  • the tank unit 50 may be installed outdoors or may also be installed indoors.
  • the heat pump water-heater outdoor unit 10 includes a compressor 2, a heat exchanger 3, a first expansion valve 4a, a second expansion valve 4b, an evaporator 5, an internal heat exchanger 6, and a fan 7.
  • the heat pump water-heater outdoor unit 10 includes a refrigerant circuit, and performs operation of a refrigeration cycle, i.e., a heat pump cycle.
  • the compressor 2 compresses low-pressure refrigerant gas.
  • a refrigerant may be, e.g., carbon dioxide.
  • the heat exchanger 3 exchanges heat between a high-temperature high-pressure refrigerant discharged from the compressor 2 and water or another liquid heating medium.
  • the liquid heating medium may be, e.g., a calcium chloride aqueous solution, an ethylene glycol aqueous solution, or alcohol.
  • Each of the first expansion valve 4a and the second expansion valve 4b is an example of a decompression device which decompresses a high-pressure refrigerant to change the high-pressure refrigerant into a low-pressure refrigerant.
  • the decompressed low-pressure refrigerant is brought into a gas-liquid two-phase state.
  • the evaporator 5 is a heat exchanger which exchanges heat between the low-pressure refrigerant and the air. In the evaporator 5, the low-pressure refrigerant evaporates by absorbing heat of the air.
  • the fan 7 blows air to the evaporator 5, and heat exchange in the evaporator 5 can be thereby facilitated.
  • the internal heat exchanger 6 includes a high-pressure flow path and a low-pressure flow path.
  • the internal heat exchanger 6 exchanges heat between the high-pressure refrigerant flowing in the high-pressure flow path and the low-pressure refrigerant flowing in the low-pressure flow path.
  • the low-pressure refrigerant gas evaporated in the evaporator 5 is sucked into the compressor 2 via the low-pressure flow path of the internal heat exchanger 6.
  • the refrigerant circuit in the present embodiment includes a first channel 8 in which the refrigerant having passed through the heat exchanger 3 reaches the evaporator 5 via the high-pressure flow path of the internal heat exchanger 6, and a second channel 9 in which the refrigerant having passed through the heat exchanger 3 bypasses the internal heat exchanger 6 and reaches the evaporator 5.
  • the first expansion valve 4a is installed in the first channel 8 on the downstream side of the high-pressure flow path of the internal heat exchanger 6.
  • the second expansion valve 4b is installed in the second channel 9.
  • the tank unit 50 includes a hot water storage tank 52, a water pump 53, a flow path switching valve 54, and a bypass flow path 55.
  • the heat pump water-heater outdoor unit 10 and the tank unit 50 are connected via external pipings 56 and 57.
  • hot water storage tank 52 water before heating and hot water after heating are stored.
  • temperature stratification in which an upper side has high temperature and a lower side has low temperature is formed due to a difference in the specific gravity of water caused by temperature.
  • a hot water supply pipe (not shown) for supplying hot water to a terminal such as, e.g., a hot water faucet, a shower, or a bathtub is connected.
  • a water supply pipe (not shown) for supplying water from a water source such as a water supply is connected.
  • hot water in the upper portion of the hot water storage tank 52 is sent to the hot water supply pipe by water pressure which is applied to the inside of the hot water storage tank 52 from the water supply pipe. Water in an amount equal to that of hot water having flowed out to the hot water supply pipe flows into the hot water storage tank 52 from the water supply pipe, and the hot water storage tank 52 is thereby kept in a fully filled state.
  • the lower portion of the hot water storage tank 52 is connected to an inlet of the water pump 53 via a conduit.
  • An outlet of the water pump 53 is connected to the flow path switching valve 54.
  • the flow path switching valve 54 is connected to a water inlet of the heat exchanger 3 of the heat pump water-heater outdoor unit 10 via the external piping 56.
  • the heat pump hot water supply system 100 can perform heat storage operation which accumulates hot water heated by the heat pump water-heater outdoor unit 10 in the hot water storage tank 52. During the heat storage operation, the following operation is performed.
  • the compressor 2, the fan 7, and the water pump 53 are operated. Water having flowed out from the lower portion of the hot water storage tank 52 flows into the heat exchanger 3 of the heat pump water-heater outdoor unit 10 through the water pump 53, the flow path switching valve 54, and the external piping 56.
  • the water is heated by the refrigerant in the heat exchanger 3 and becomes hot water.
  • the temperature of hot water heated in the heat exchanger 3 may be, e.g., about 65°C to about 90°C.
  • Hot water having flowed out from the heat exchanger 3 returns to the tank unit 50 through the external piping 57, and flows into the upper portion of the hot water storage tank 52 through a tank upper pipe 58.
  • the flow path switching valve 54 can switch the flow path such that water discharged from the water pump 53 is caused to pass through the bypass flow path 55 instead of the heat pump water-heater outdoor unit 10, and flow into the tank upper pipe 58.
  • the heat pump water-heater outdoor unit of the present invention is not limited to the heat pump water-heater outdoor unit constituting part of a hot water supply system such as the above-described heat pump hot water supply system 100, and may also be the heat pump water-heater outdoor unit which is used for the purpose of heating the liquid heating medium in, e.g., a hot-water heating system. That is, the liquid heating medium heated by the heat pump water-heater outdoor unit of the present invention may be supplied to an indoor heating appliance such as, e.g., a floor heating panel which is installed under a floor, a radiator or a panel heater which is installed on an indoor wall surface, or a fan convector.
  • an indoor heating appliance such as, e.g., a floor heating panel which is installed under a floor, a radiator or a panel heater which is installed on an indoor wall surface, or a fan convector.
  • FIG. 2 is a perspective view showing the appearance of the heat pump water-heater outdoor unit 10 of Embodiment 1.
  • FIG. 3 is an exploded perspective view of the heat pump water-heater outdoor unit 10 of Embodiment 1.
  • the heat pump water-heater outdoor unit 10 includes a plurality of leg portions 41. The leg portions 41 are fixed to the ground or a floor surface.
  • the heat pump water-heater outdoor unit 10 includes a bottom plate 18, a front panel 19, a side panel 20, and a top panel 21.
  • the bottom plate 18, the front panel 19, the side panel 20, and the top panel 21 constitute an outer shell, i.e., a cabinet of the heat pump water-heater outdoor unit 10.
  • the bottom plate 18, the front panel 19, the side panel 20, and the top panel 21 are preferably made of metal.
  • the bottom plate 18 corresponds to a base or a frame of the heat pump water-heater outdoor unit 10. Constituent devices such as the compressor 2 are mounted on the bottom plate 18.
  • the leg portions 41 are fixed to the lower surface of the bottom plate 18.
  • the front panel 19 covers the front surface and the left side surface of the heat pump water-heater outdoor unit 10.
  • the side panel 20 covers part of the rear surface and the right side surface of the heat pump water-heater outdoor unit 10.
  • the top panel 21 covers the upper surface of the heat pump water-heater outdoor unit 10.
  • the evaporator 5 is disposed so as to cover the rear surface and the left side surface of the heat pump water-heater outdoor unit 10.
  • the fan 7 is disposed between the evaporator 5 and the front panel 19.
  • the fan 7 in the present embodiment includes a propeller fan.
  • the internal portion of the outer shell of the heat pump water-heater outdoor unit 10 is partitioned into a fan room 15 in which the fan 7 is disposed and a machine room 14.
  • the fan room 15 is separated from the machine room 14 by a partition plate 16.
  • the compressor 2 and refrigerant piping are disposed in the machine room 14. In FIG. 3 , depiction of soundproofing materials 32 and 33 described later is omitted.
  • a case 13 is disposed below the fan 7.
  • the heat exchanger 3 is stored in the case 13 in a state in which the heat exchanger 3 is covered with a heat insulating material.
  • the front panel 19 has an opening at a position which faces the fan 7.
  • a grille 23 which covers the opening is mounted to the front panel 19.
  • the heat pump water-heater outdoor unit 10 includes an electrical component storage box 17.
  • the electrical component storage box 17 is disposed in space which occupies part of the upper portion of the fan room 15 and the upper portion of the machine room 14.
  • an electrical component such as, e.g., an inverter power supply which drives and controls a motor of the compressor 2 and a motor of the fan 7 is stored.
  • a terminal block is provided near the electrical component storage box 17. The terminal block is used when external electrical wiring is connected.
  • a service panel 22 is detachably attached to the side panel 20. The service panel 22 protects the terminal block.
  • a connection portion cover 42 is detachably attached to the side panel 20 below the service panel 22. The connection portion cover 42 protects a connection portion (not shown) to which the external pipings 56 and 57 are connected.
  • FIG. 4 is an exploded perspective view showing the bottom plate 18 and the compressor 2 of the heat pump water-heater outdoor unit 10 of Embodiment 1.
  • the bottom plate 18 has a shape in which a plurality of projections and depressions, stepped portions, and slopes which have height differences of, e.g., about 1 cm are formed.
  • the bottom plate 18 has a rectangular bottom surface 181, and an edge portion 182 which extends upward from each side of the bottom surface 181.
  • the bottom plate 18 may be formed by press working such as, e.g., drawing.
  • the bottom plate 18 has water shielding properties.
  • drain holes 36 for discharging drainage are formed. It is preferable that the drain hole 36 is provided at the lowest position in the bottom plate 18.
  • the number of drain holes 36 may be two or more.
  • the temperature of the evaporator 5 becomes low during the operation of the heat pump water-heater outdoor unit 10, and hence there are cases where water contained in air passing through the evaporator 5 is condensed on the surface of the evaporator 5.
  • the condensed drainage flows down due to gravity.
  • the bottom plate 18 receives the drainage. The drainage flows toward the position of the drain hole 36 with the height differences formed in the bottom plate 18, and is discharged from the drain hole 36 to space below the bottom plate 18.
  • the compressor 2 includes a shell.
  • the shape of the shell may be a cylindrical shape shown in the drawing.
  • a compression device which compresses the refrigerant and a motor which drives the compression device are stored inside the shell of the compressor 2, through the depiction thereof is omitted.
  • the compression device may be any of, e.g., reciprocation-type, scroll-type, and rotary-type compression devices.
  • a suction muffler 25 is positioned adjacent to the shell of the compressor 2.
  • the suction muffler 25 is coupled to the side surface of the shell of the compressor 2.
  • the shape of the suction muffler 25 may be a cylindrical shape smaller than that of the shell of the compressor 2.
  • a suction pipe 26 is connected to the suction muffler 25. Low-pressure refrigerant gas is sucked into the compressor 2 through the suction pipe 26 and the suction muffler 25.
  • a discharge pipe 27 is connected to the compressor 2. High-pressure refrigerant gas compressed in the compressor 2 is discharged to the discharge pipe 27.
  • a compressor leg portion 30 is fixed to the bottom portion of the shell of the compressor 2.
  • the compressor 2 is mounted on the bottom plate 18 via the compressor leg portion 30.
  • the compressor leg portion 30 has a strength which allows the compressor leg portion 30 to support the weight of the compressor 2 and the suction muffler 25.
  • the compressor leg portion 30 is preferably made of metal.
  • the compressor leg portion 30 corresponds to a base portion which supports the compressor 2.
  • the compressor leg portion 30 in the embodiment is a plate-like member.
  • the upper surface of the compressor leg portion 30 is joined to the bottom surface of the shell of the compressor 2.
  • the compressor leg portion 30 may be welded to the shell of the compressor 2.
  • a plurality of (three in the present embodiment) holes 43 are formed in the compressor leg portion 30.
  • a plurality of (three in the present embodiment) bolts 28 for coupling the compressor 2 to the bottom plate 18 are installed on the bottom plate 18. Each bolt 28 protrudes upward.
  • the bolt 28 may also be a weld bolt which is welded to the upper surface of the bottom plate 18.
  • the heat pump water-heater outdoor unit 10 includes a plurality of (three in the present embodiment) vibration isolation members 29. Each vibration isolation member 29 is disposed between the upper surface of the bottom plate 18 and the lower surface of the compressor leg portion 30.
  • the vibration isolation member 29 is a member having elasticity such as, e.g., rubber or a spring.
  • the shape of the vibration isolation member 29 may be a cylindrical shape shown in the drawing or a columnar shape.
  • the vibration isolation member 29 has a hole through which the bolt 28 can pass.
  • the bolt 28 passes through the hole of the vibration isolation member 29 and the hole 43 of the compressor leg portion 30.
  • a nut 31 is screwed on the bolt 28.
  • the vibration isolation member 29 and the compressor leg portion 30 are held between the bottom plate 18 and the nut 31, and the compressor 2 is thereby coupled to the bottom plate 18.
  • a soundproofing material placement portion 24 is disposed so as to surround the periphery of the compressor leg portion 30. The configuration of the soundproofing material placement portion 24 and the function thereof will be described later in detail.
  • vibration is generated by torque fluctuation of a rotator inside the compressor 2, unbalance of the rotator, and pulsation of refrigerant pressure.
  • high compression pressure is required, and hence the vibration of the compressor 2 tends to be increased.
  • the weight of the compressor 2 and the suction muffler 25 is applied to the bottom plate 18 via the vibration isolation member 29.
  • the vibration isolation member 29 absorbs the vibration during the operation of the compressor 2, whereby it is possible to reliably suppress the transmission of the vibration of the compressor 2 to the bottom plate 18.
  • the vibration isolation member 29 is not provided and the compressor 2 is directly fixed to the upper surface of the bottom plate 18, the following problem arises.
  • the vibration of the compressor 2 is transmitted to the bottom plate 18, and the vibration of the bottom plate 18 is further transmitted to the front panel 19, the side panel 20, the top panel 21, the partition plate 16, and the evaporator 5.
  • the vibrations of the bottom plate 18, the front panel 19, the side panel 20, the top panel 21, the partition plate 16, and the evaporator 5 will generate noise, particularly low-frequency noise.
  • the low-frequency noise is sound including low frequency which cannot be perceived by the sense of hearing of a human being.
  • the vibration isolation member 29 by providing the vibration isolation member 29, it is possible to reduce the vibrations of the bottom plate 18, the front panel 19, the side panel 20, the top panel 21, the partition plate 16, and the evaporator 5. Therefore, it is possible to reliably suppress generation of noise, particularly low-frequency noise.
  • FIG. 5 is a perspective view showing the bottom plate 18, the compressor 2, and the soundproofing materials 32 and 33 of the heat pump water-heater outdoor unit 10 of Embodiment 1.
  • the heat pump water-heater outdoor unit 10 includes the soundproofing materials 32 and 33.
  • the soundproofing material 32 at least partially covers the side surface of the compressor 2.
  • the soundproofing material 32 covers the entire side surfaces of the compressor 2 and the suction muffler 25.
  • the soundproofing material 32 becomes cylindrical by being wound around the compressor 2 and the suction muffler 25.
  • the compressor 2 and the suction muffler 25 are positioned inside the cylindrical soundproofing material 32.
  • the soundproofing material 33 covers the compressor 2 and the suction muffler 25 from above.
  • the soundproofing material 33 is disposed so as to close an opening at the upper end of the cylindrical soundproofing material 32.
  • holes 44 for passage of the suction pipe 26 and the discharge pipe 27 are formed. According to the present embodiment, by providing the soundproofing materials 32 and 33, it is possible to reliably suppress leakage of noise during the operation of the compressor 2 to the outside of the heat pump water-heater outdoor unit 10.
  • Each of the soundproofing materials 32 and 33 includes a sound absorbing material.
  • the sound absorbing material is made of a material having fine voids.
  • the sound absorbing material may include at least one of, e.g., felt, glass wool, and rock wool.
  • Each of the soundproofing materials 32 and 33 may further include a sound insulating material.
  • the sound absorbing material may constitute an inner layer of each of the soundproofing materials 32 and 33, and the sound insulating material may constitute an outer layer of each of the soundproofing materials 32 and 33.
  • the sound insulating material is made of a material having a density higher than that of the sound absorbing material.
  • the sound insulating material may be formed of, e.g., a rubber material or a resin material.
  • the drain hole 36 provided in the bottom plate 18 is clogged with a foreign object such as, e.g., dead leaves or mud, and the drain hole 36 may be thereby blocked.
  • a foreign object such as, e.g., dead leaves or mud
  • the evaporator 5 is constantly cooled during the operation of the heat pump water-heater outdoor unit 10. Consequently, the amount of condensed water generated on the surface of the evaporator 5 is large than that of an outdoor unit of an air conditioner. In the case where the drain hole 36 is blocked, there is a possibility that a large amount of drainage will collect on the bottom plate 18.
  • the sound absorbing material of each of the soundproofing materials 32 and 33 has fine voids, and hence the sound absorbing material has water absorption properties. Assuming that the lower end of the soundproofing material 32 comes into contact with a pool of the drainage on the bottom plate 18, the sound absorbing material of the soundproofing material 32 absorbs water. The sound absorption performance of the sound absorbing material having absorbed water is degraded. In addition, the water absorbed in the sound absorbing material comes into contact with the compressor 2, and the compressor 2 may be thereby corroded. In order to avoid these harmful effects, it is necessary to reliably prevent the lower end of the soundproofing material 32 from coming into contact with the pool of the drainage on the bottom plate 18.
  • the heat pump water-heater outdoor unit 10 of the present embodiment includes the soundproofing material placement portion 24 which retains the position of the lower end of the soundproofing material 32.
  • the soundproofing material placement portion 24 is disposed on the bottom plate 18.
  • the soundproofing material placement portion 24 is shaped such that part of the soundproofing material placement portion 24 extends along the corner portion 183 of the bottom plate 18. More specifically, the soundproofing material placement portion 24 has a first side 241 which is configured so as to extend along the side surface of the edge portion 182 of the bottom plate 18 on a right side surface side, and a second side 242 which is configured so as to extend along the side surface of the edge portion 182 of the bottom plate 18 on a front surface side.
  • the soundproofing material placement portion 24 is disposed such that the first side 241 and the second side 242 are in contact with the edge portions 182 including the corner portion 183 of the bottom plate 18. According to such an arrangement, the corner portion 183 of the bottom plate 18 is covered with the soundproofing material placement portion 24.
  • the soundproofing material placement portion 24 by providing the soundproofing material placement portion 24, the following effect can be obtained. Even in the case where the pool of the drainage has occurred on the bottom plate 18 due to the blockage of the drain hole 36, it is possible to reliably prevent the situation in which the pool of the drainage occurs at the corner portion 183 and the lower end of the soundproofing material 32 is soaked in the pool of the drainage. It is possible to reliably prevent water from being absorbed in the sound absorbing material of the soundproofing material 32. It is possible to reliably prevent the occurrence of harmful effects such as a harmful effect in which the sound absorption performance of the sound absorbing material of the soundproofing material 32 is degraded and a harmful effect in which the compressor 2 is corroded.
  • FIG. 6 is a cross-sectional view of the compressor 2, the bottom plate 18, the soundproofing material placement portion 24, and the soundproofing materials 32 and 33 in Embodiment 1.
  • FIG. 6 shows the appearance of the compressor 2 instead of the cross section thereof.
  • an upper surface 243 of the soundproofing material placement portion 24 is at a position above the upper end of the edge portion 182 of the bottom plate 18. More specifically, when a height from the bottom surface 181 of the bottom plate 18 to the upper end of the edge portion 182 is h1 and a height from the bottom surface 181 of the bottom plate 18 to the upper surface 243 of the soundproofing material placement portion 24 is h2, the soundproofing material placement portion 24 and the bottom plate 18 are configured so as to satisfy h2 > h1.
  • the upper surface 243 of the soundproofing material placement portion 24 is in contact with the lower end surface of the soundproofing material 32.
  • FIG. 7 is a perspective view of the soundproofing material placement portion 24 before the soundproofing material placement portion 24 is mounted to the compressor 2 in Embodiment 1 when viewed from above.
  • FIG. 8 is a perspective view of the soundproofing material placement portion 24 before the soundproofing material placement portion 24 is mounted to the compressor 2 in Embodiment 1 when viewed from below.
  • FIG. 9 is a view obtained by viewing the internal structure of the heat pump water-heater outdoor unit 10 to which the soundproofing material placement portion 24 in Embodiment 1 is mounted through the upper surface.
  • a concave drain flow path 244 is provided on the lower surface of the soundproofing material placement portion 24 .
  • the drain flow path 244 has an inlet 245 and an outlet 246 which are opened on the sides of the side surfaces of the soundproofing material placement portion 24.
  • the inlet 245 is opened on the evaporator side, and the outlet 246 is opened on the drain hole 36 side.
  • the inlet 245 is opened more widely than the outlet 246.
  • the drain flow path 244 by providing the drain flow path 244, the following effect can be obtained.
  • the drainage having flowed down from the evaporator 5 passes through the drain flow path 244 from the inlet 245, flows out from the outlet 246, and is discharged to the drain hole 36.
  • the inlet 245 is widely opened toward the evaporator 5, and hence it is easy to take in the drainage having flowed down from the evaporator 5.
  • the outlet 246 is narrowly opened toward the drain hole 36, and hence it is possible to effectively prevent the drainage having flowed out from the outlet 246 from flowing to other areas.
  • it is possible to increase the drainage efficiency of the drainage to reliably prevent the soundproofing material 32 from being soaked in the drainage.
  • the soundproofing material placement portion 24 is disposed on the bottom plate 18 by using the vibration isolation members 29 as positioning members. As shown in FIG. 7 and FIG. 8 , the soundproofing material placement portion 24 does not have an annular shape but has an arc-like shape. More specifically, the soundproofing material placement portion 24 is disposed to surround two sides of a triangle of the compressor leg portion 30 to which the compressor 2 is fixed so as to arc. According to the present embodiment, by providing the arc-shaped soundproofing material placement portion 24, the following effect can be obtained. Even in a state in which the compressor 2 is fixed to the bottom plate 18, it is possible to install the soundproofing material placement portion 24 on the bottom plate 18. With this, it is possible to mount the soundproofing material placement portion 24 irrespective of assembly procedure.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Other Air-Conditioning Systems (AREA)
EP18902846.7A 2018-01-23 2018-01-23 Heat pump hot water supply outdoor unit Active EP3745033B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2018/001994 WO2019146003A1 (ja) 2018-01-23 2018-01-23 ヒートポンプ給湯室外機

Publications (3)

Publication Number Publication Date
EP3745033A1 EP3745033A1 (en) 2020-12-02
EP3745033A4 EP3745033A4 (en) 2021-01-06
EP3745033B1 true EP3745033B1 (en) 2023-08-09

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EP18902846.7A Active EP3745033B1 (en) 2018-01-23 2018-01-23 Heat pump hot water supply outdoor unit

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EP (1) EP3745033B1 (ja)
JP (1) JP6747614B2 (ja)
NZ (1) NZ764215A (ja)
WO (1) WO2019146003A1 (ja)

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Publication number Priority date Publication date Assignee Title
CN110779210B (zh) * 2019-11-13 2021-06-08 江苏浴普太阳能有限公司 一种空气能热水器底盘装置
JP2023052717A (ja) * 2020-03-16 2023-04-12 株式会社富士通ゼネラル 空気調和機
DE102020112799A1 (de) * 2020-05-12 2021-11-18 Viessmann Werke Gmbh & Co Kg Wärmepumpenanlage
JP7223723B2 (ja) * 2020-05-28 2023-02-16 日立グローバルライフソリューションズ株式会社 ヒートポンプ式給湯機
JP6958771B1 (ja) * 2021-02-05 2021-11-02 三菱電機株式会社 圧縮機腐食診断器および圧縮機腐食診断方法
DE102021104783B3 (de) * 2021-03-01 2022-06-30 Viessmann Climate Solutions Se Wärmepumpe
DE102021205746A1 (de) 2021-06-08 2022-12-08 Robert Bosch Gesellschaft Für Medizinische Forschung Mbh Wärmepumpe mit einem Bodengestell
AU2023207099A1 (en) * 2022-01-14 2024-06-06 Rheem Manufacturing Company Shroud structure

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4982812A (en) * 1989-10-24 1991-01-08 Hwang Min Su Noise-preventive means for compressor used in air conditioner
JPH0719531A (ja) * 1993-07-07 1995-01-20 Toshiba Corp 空気調和機の室外ユニット
JP2005241197A (ja) * 2004-02-27 2005-09-08 Kimura Kohki Co Ltd ヒートポンプ式空調機
JP5146525B2 (ja) * 2010-12-24 2013-02-20 三菱電機株式会社 ヒートポンプ式熱源機ユニット
JP2013053771A (ja) * 2011-09-01 2013-03-21 Daikin Industries Ltd 室外機
JP2013053827A (ja) 2011-09-06 2013-03-21 Daikin Industries Ltd 室外機
JP2013068386A (ja) * 2011-09-26 2013-04-18 Daikin Industries Ltd 室外機
JP2013088003A (ja) * 2011-10-17 2013-05-13 Daikin Industries Ltd 室外機

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JP6747614B2 (ja) 2020-08-26
JPWO2019146003A1 (ja) 2020-04-30
EP3745033A1 (en) 2020-12-02
WO2019146003A1 (ja) 2019-08-01
EP3745033A4 (en) 2021-01-06
NZ764215A (en) 2024-08-30

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