WO2020017021A1 - Heat pump water heater outdoor unit - Google Patents

Heat pump water heater outdoor unit Download PDF

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Publication number
WO2020017021A1
WO2020017021A1 PCT/JP2018/027274 JP2018027274W WO2020017021A1 WO 2020017021 A1 WO2020017021 A1 WO 2020017021A1 JP 2018027274 W JP2018027274 W JP 2018027274W WO 2020017021 A1 WO2020017021 A1 WO 2020017021A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
outdoor unit
hot water
heat exchanger
refrigerant
Prior art date
Application number
PCT/JP2018/027274
Other languages
French (fr)
Japanese (ja)
Inventor
敏也 山内
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/JP2018/027274 priority Critical patent/WO2020017021A1/en
Priority to NZ770289A priority patent/NZ770289A/en
Priority to EP18926577.0A priority patent/EP3825622B1/en
Priority to JP2020530839A priority patent/JP6921326B2/en
Publication of WO2020017021A1 publication Critical patent/WO2020017021A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H4/00—Fluid heaters characterised by the use of heat pumps
    • F24H4/02—Water heaters
    • 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
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/0097—Casings or frame structures for hydraulic components
    • 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
    • F24D19/00—Details
    • F24D19/08—Arrangements for drainage, venting or aerating
    • F24D19/082—Arrangements for drainage, venting or aerating for water heating systems
    • F24D19/088—Draining arrangements
    • 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
    • F24F1/14—Heat exchangers specially adapted for separate outdoor units
    • F24F1/16—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
    • F24F1/36—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
    • 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
    • F24F1/56—Casing or covers of separate outdoor units, e.g. fan guards
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H4/00—Fluid heaters characterised by the use of heat pumps
    • F24H4/02—Water heaters
    • F24H4/04—Storage heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/02—Casings; Cover lids; Ornamental panels
    • 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
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/12—Heat pump

Definitions

  • the present invention relates to a heat pump hot water supply outdoor unit in which a water-refrigerant heat exchanger is housed in a box-shaped heat insulating material to reduce heat radiation from the water-refrigerant heat exchanger to the outside.
  • the heat pump hot water supply outdoor unit included in the heat pump hot water supply system includes an evaporator that absorbs atmospheric heat into a refrigerant, a blower that blows air to the evaporator, a compressor that compresses the refrigerant, and water that heats water with the compressed high-temperature and high-pressure refrigerant.
  • a refrigerant heat exchanger and the like are mounted.
  • the water-refrigerant heat exchanger is housed in a box-shaped heat insulator.
  • the water-refrigerant heat exchanger When the water-refrigerant heat exchanger is stored in a box-shaped heat insulating material, the water-refrigerant heat exchanger may be corroded as described below. Specifically, when dew condensation occurs on the surface of the water-refrigerant heat exchanger, water on the surface of the water-refrigerant heat exchanger flows down and accumulates on the inner bottom of the heat insulating material. If the water-refrigerant heat exchanger is immersed in the water accumulated in the inner bottom of the heat insulating material, the water-refrigerant heat exchanger may corrode.
  • the water-refrigerant heat exchanger should not be immersed in the water accumulated at the inner bottom of the heat insulating material.
  • the inner bottom part of the heat insulating material is a bottom part on the inner side of the heat insulating material.
  • the heat insulating material that accommodates the water-refrigerant heat exchanger includes a lower heat insulating material and an upper heat insulating material.
  • the lower heat insulating material is a box-shaped heat insulating material that is open at the top and is long in the left-right direction.
  • the upper heat insulator is a heat insulator that covers the upper opening of the lower heat insulator.
  • the inner bottom of the lower heat insulating material has a flat portion, and the water-refrigerant heat exchanger is placed on the flat portion.
  • a water leakage discharge portion is provided in the inner bottom of the lower heat insulating material in order to suppress accumulation of water in the inner bottom.
  • the water leakage discharge section includes a through hole penetrating the inner bottom of the lower heat insulating material, and a filler sealing the through hole. According to Patent Literature 1, with such a configuration, water that has flowed down to the inner bottom of the lower heat insulating material flows through the through hole while permeating or dissolving the filler, and is discharged to the outside of the heat insulating material.
  • a water leakage discharge section is provided on a flat portion at the inner bottom of the lower heat insulating material on which the water / refrigerant heat exchanger is placed. For this reason, dew condensation occurs on the surface of the water-refrigerant heat exchanger, and when water on the surface of the water-refrigerant heat exchanger flows down to the flat part of the inner bottom of the lower heat insulating material, the water is discharged from the water leakage discharge part. During this time, the water refrigerant heat exchanger will be immersed in the water.
  • the portion where the water-refrigerant heat exchanger is placed on the inner bottom of the lower heat insulating material is a flat portion as described above, the water that has flowed down to the flat portion easily stays on the flat portion. For this reason, the water accumulated in the flat portion does not flow into the leak discharge portion until a certain amount of water is accumulated in the flat portion. Therefore, the heat pump hot water supply outdoor unit described in Patent Literature 1 still cannot sufficiently prevent the water refrigerant heat exchanger from being immersed in the water accumulated in the inner bottom of the heat insulating material, and still has sufficient corrosion of the water refrigerant heat exchanger. There was a problem that it could not be suppressed.
  • the present invention has been made in order to solve the above-described problems, and even when dew condensation occurs in the water-refrigerant heat exchanger stored in the box-shaped heat insulating material, the water-refrigerant heat exchanger has a more
  • An object of the present invention is to provide a heat pump hot water supply outdoor unit that can suppress immersion in water.
  • the heat pump hot water supply outdoor unit includes a box-shaped heat insulating material, and a water-refrigerant heat exchanger that is housed in the heat insulating material and heats water with a refrigerant, and an inner bottom portion of the heat insulating material has a convex portion. And a concave / convex shape having a concave portion, wherein the concave portion is formed with a drain hole penetrating the inner bottom portion, and the water / refrigerant heat exchanger is placed on the convex portion.
  • dew condensation occurs on the surface of the water-refrigerant heat exchanger, and when water on the surface of the water-refrigerant heat exchanger flows down to the inner bottom of the heat insulating material, the water is removed from the inner bottom. Collect in the recess. Then, the water accumulated in the concave portion is discharged to the outside of the heat insulating material from a drain hole formed in the concave portion.
  • the heat pump hot-water supply outdoor unit suppresses the water-refrigerant heat exchanger from being immersed in water as compared with the related art even when dew condensation occurs in the water-refrigerant heat exchanger stored in the box-shaped heat insulating material. it can.
  • heat pump hot water supply outdoor unit may include any combination of configurations that can be combined among the configurations described below.
  • FIG. 1 is a piping diagram illustrating a heat pump hot water supply system including a heat pump hot water supply outdoor unit according to an embodiment of the present invention.
  • the heat pump hot water supply system 90 includes the heat pump hot water supply outdoor unit 1 and a tank unit 91.
  • the heat pump hot water supply outdoor unit 1 is installed outside the room.
  • the tank unit 91 may be installed outdoors or may be installed indoors.
  • the heat pump hot water supply outdoor unit 1 includes a compressor 2, a water refrigerant heat exchanger 3, a first expansion valve 4a, a second expansion valve 4b, an evaporator 5, an internal heat exchanger 6, and a blower 7.
  • the heat pump hot water supply outdoor unit 1 includes a refrigerant circuit and operates a refrigeration cycle, that is, a heat pump cycle.
  • the compressor 2 compresses the low-pressure refrigerant.
  • the refrigerant may be, for example, carbon dioxide.
  • the water-refrigerant heat exchanger 3 includes a refrigerant pipe 3b through which high-temperature and high-pressure refrigerant discharged from the compressor 2 flows, and a water pipe 3a through which water supplied from the tank unit 91 flows.
  • heat exchanger 3 heat exchange is performed between the high-temperature and high-pressure refrigerant flowing through the refrigerant pipe 3b and the water flowing through the water pipe 3a. That is, the water flowing through the water pipe 3a is heated by the high-temperature and high-pressure refrigerant flowing through the refrigerant pipe 3b.
  • the first expansion valve 4a and the second expansion valve 4b are examples of a decompression device that decompresses a high-pressure refrigerant into a low-pressure refrigerant.
  • the decompressed low-pressure refrigerant is in a gas-liquid two-phase state.
  • the evaporator 5 is a heat exchanger that exchanges heat between the low-pressure refrigerant and the atmosphere. In the evaporator 5, the low-pressure refrigerant evaporates by absorbing atmospheric heat. By the blower 7 blowing air to the evaporator 5, heat exchange in the evaporator 5 can be promoted.
  • the internal heat exchanger 6 includes a high-pressure channel and a low-pressure channel.
  • the internal heat exchanger 6 exchanges heat between the high-pressure refrigerant flowing through the high-pressure flow path and the low-pressure refrigerant flowing through the low-pressure flow path.
  • the low-pressure refrigerant evaporated in the evaporator 5 is sucked into the compressor 2 via the low-pressure flow path of the internal heat exchanger 6.
  • the tank unit 91 includes a hot water storage tank 92, a pump 93, a flow path switching valve 94, and a bypass pipe 95.
  • the heat pump hot water supply outdoor unit 1 and the tank unit 91 are connected via an external pipe 96 and an external pipe 97.
  • the hot water storage tank 92 water before heating and hot water after heating are stored.
  • a temperature stratification with a high temperature on the upper side and a low temperature on the lower side is formed due to a difference in specific gravity of water depending on the temperature.
  • a hot water supply pipe (not shown) for supplying hot water to terminals such as a hot water tap, a shower, and a bathtub is connected to an upper portion of the hot water storage tank 92.
  • a water supply pipe (not shown) for supplying water from a water source such as a tap is connected to a lower portion of the hot water storage tank 92.
  • hot water above the hot water storage tank 92 is sent to the hot water supply pipe by water pressure acting on the hot water storage tank 92 from the water supply pipe.
  • the hot water storage tank 92 is maintained in a full state.
  • the lower part of the hot water storage tank 92 is connected to the inlet of the pump 93 via a conduit.
  • the outlet of the pump 93 is connected to a flow path switching valve 94.
  • the flow path switching valve 94 is connected to the water pipe 3a of the water / refrigerant heat exchanger 3 of the heat pump hot water supply outdoor unit 1 via an external pipe 96.
  • the heat pump hot water supply system 90 can perform a heat storage operation of storing hot water heated by the heat pump hot water supply outdoor unit 1 in the hot water storage tank 92. At the time of the heat storage operation, it becomes as follows.
  • the compressor 2, the blower 7, and the pump 93 are operated.
  • the water flowing out from the lower part of the hot water storage tank 92 flows into the water / refrigerant heat exchanger 3 of the heat pump hot water supply outdoor unit 1 through the pump 93, the flow path switching valve 94, and the external pipe 96.
  • This water is heated by the refrigerant in the water-refrigerant heat exchanger 3 to become hot water.
  • the temperature of the hot water heated by the water-refrigerant heat exchanger 3 is, for example, about 65 ° C. to 90 ° C.
  • Hot water flowing out of the water-refrigerant heat exchanger 3 returns to the tank unit 91 through the external pipe 97 and flows into the upper portion of the hot water storage tank 92 through the tank upper pipe
  • the flow path switching valve 94 can switch the flow path so that the water discharged from the pump 93 flows into the tank upper pipe 98 through the bypass pipe 95 instead of the heat pump hot water supply outdoor unit 1.
  • FIG. 2 is a perspective view of the heat pump hot water supply outdoor unit according to the embodiment of the present invention as viewed from the front right side.
  • FIG. 3 is an exploded perspective view of the heat pump hot water supply outdoor unit according to the embodiment of the present invention, as viewed from the front right side.
  • the heat pump hot water supply outdoor unit 1 includes a plurality of legs 25. The leg 25 is fixed to the ground or the floor.
  • the heat pump hot water supply outdoor unit 1 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 of the heat pump hot water supply outdoor unit 1, that is, a housing.
  • the bottom plate 18, the front panel 19, the side panels 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 hot water supply outdoor unit 1.
  • the components such as the compressor 2 are mounted on the bottom plate 18.
  • the leg 25 is fixed to the lower surface of the bottom plate 18.
  • the front panel 19 covers the front and left sides of the heat pump hot water supply outdoor unit 1.
  • the side panel 20 covers a part of the rear surface and the right side surface of the heat pump hot water supply outdoor unit 1.
  • the top panel 21 covers the upper surface of the heat pump hot water supply outdoor unit 1.
  • the evaporator 5 is disposed so as to cover the rear surface and the left side surface of the heat pump hot water supply outdoor unit 1.
  • the inside of the outer shell of the heat pump hot water supply outdoor unit 1 is divided into a blower room 15 in which the blower 7 is provided and a machine room 14.
  • a partition plate 16 separates the blower room 15 from the machine room 14.
  • the compressor 2 In the machine room 14, the compressor 2, a refrigerant pipe, and the like are arranged.
  • the compressor 2 is covered with a soundproof material (not shown).
  • the blower room 15 In the blower room 15, the blower 7 is arranged between the evaporator 5 and the front panel 19.
  • Blower 7 in the present embodiment includes a propeller fan.
  • a case 8 is arranged below the blower 7.
  • the water-refrigerant heat exchanger 3 is housed in a case 8 while being covered with an upper heat insulating material 9 and a lower heat insulating material 10 described later.
  • the front panel 19 has an opening at a position facing the blower 7.
  • a grill 24 covering this opening is attached to the front panel 19.
  • the heat pump hot water supply outdoor unit 1 includes an electric component storage box 17.
  • the electric component storage box 17 is disposed in a space occupying a part of an upper part of the blower room 15 and an upper part of the machine room 14.
  • electric components such as an inverter power supply for driving and controlling the motor of the compressor 2 and the motor of the blower 7 are stored.
  • a service panel 22 is detachably attached to the side panel 20.
  • the service panel 22 protects the terminal block.
  • a connection cover 23 is detachably attached to the side panel 20.
  • the connection part cover 23 protects a connection part (not shown) to which the external pipe 96 and the external pipe 97 are connected.
  • FIG. 4 is a perspective view of a bottom plate, an upper heat insulating material, a lower heat insulating material, a water-refrigerant heat exchanger, and the like included in the heat pump hot water supply outdoor unit according to the embodiment of the present invention, as viewed from the front right side.
  • the bottom plate 18 has a shape in which a plurality of irregularities, steps, slopes, and the like having a height difference of, for example, about 1 cm are formed.
  • the bottom plate 18 may be formed by press working such as drawing.
  • the bottom plate 18 has water shielding.
  • a drain port (not shown) is formed in the bottom plate 18. This drain port is desirably at the lowest position of the bottom plate 18.
  • This drain port is desirably at the lowest position of the bottom plate 18.
  • a place where the heat pump hot water supply outdoor unit 1 is installed may be provided with a hopper or the like for receiving water discharged from the drain port.
  • the drain port By forming the drain port in the bottom plate 18, the following effects can be obtained.
  • the condensed water and the like generated on the surface of the evaporator 5 are collected by the bottom plate 18 and drained from the drain to the outside of the heat pump hot water supply outdoor unit 1, so that water can be prevented from flowing out of a portion other than the drain.
  • the user can be reliably prevented from misunderstanding that there is a water leak in the heat pump hot water supply outdoor unit 1.
  • the box-shaped heat insulating material in the present embodiment has a vertically divided structure, and has a box-shaped lower heat insulating material 10 that houses the water-refrigerant heat exchanger 3 inside, and a lid-shaped heat insulating material that covers the upper surface thereof. It is composed of an upper heat insulating material 9.
  • FIG. 5 is a perspective view of a bottom plate, a lower heat insulating material, a water-refrigerant heat exchanger, and the like included in the heat pump hot water supply outdoor unit according to the embodiment of the present invention, as viewed from the front right side.
  • the direction D1 indicated by an arrow in FIG. 5 indicates the left-right direction of the heat pump hot water supply outdoor unit 1. That is, the direction D1 indicates the left-right direction of the lower heat insulating material 10 and the water-refrigerant heat exchanger 3.
  • the direction D2 indicated by an arrow in FIG. 5 indicates the front-back direction of the heat pump hot water supply outdoor unit 1. That is, the direction D2 indicates the front-back direction of the lower heat insulating material 10 and the water-refrigerant heat exchanger 3.
  • the internal space of the lower heat insulating material 10 has a substantially rectangular parallelepiped shape that is long in the left-right direction.
  • the water-refrigerant heat exchanger 3 is placed on the inner bottom 10 a of the lower heat insulating material 10. Note that the inner bottom portion 10 a of the lower heat insulating material 10 is a bottom portion on the inner side of the lower heat insulating material 10.
  • the water refrigerant heat exchanger 3 is a tubular heat exchanger such as a double tube type.
  • the water-refrigerant heat exchanger 3 is structured to be vertically stacked while being bent into a rectangular shape corresponding to the shape of the internal space of the lower heat insulating material 10. That is, when the water-refrigerant heat exchanger 3 is viewed in plan, the left-right direction is the longitudinal direction, and the front-rear direction is the short direction.
  • FIG. 6 is a perspective view of the lower heat insulating material provided in the heat pump hot water supply outdoor unit according to the embodiment of the present invention, as viewed from the front right side.
  • FIG. 7 is a vertical cross-sectional view of the lower heat insulating material provided in the heat pump hot water supply outdoor unit according to the embodiment of the present invention, which is cut by a vertical plane parallel to the shorter direction of the lower heat insulating material.
  • FIG. 8 is a longitudinal sectional view of the lower heat insulating material provided in the heat pump hot water supply outdoor unit according to the embodiment of the present invention, which is cut by a vertical plane parallel to the longitudinal direction of the lower heat insulating material.
  • the inner bottom portion 10a of the lower heat insulating material 10 has an uneven shape having a convex portion 12 and a concave portion 13. More specifically, the inner bottom portion 10a of the lower heat insulating material 10 includes a plurality of convex portions 12 extending in a direction that is shorter when the lower heat insulating material 10 is viewed in plan.
  • the plurality of protrusions 12 are arranged at predetermined intervals. A portion lower than the plurality of protrusions 12 is formed between the plurality of protrusions 12, and the portion serves as a recess 13. At least one drainage hole 11 penetrating the inner bottom portion 10a is formed in the recess 13. In the first embodiment, a plurality of drain holes 11 are formed. Then, the water-refrigerant heat exchanger 3 is placed on the plurality of protrusions 12.
  • the heat pump hot-water supply outdoor unit 1 according to the present embodiment has a configuration in which the water-refrigerant heat exchanger 3 has more water than the conventional case even when dew condensation occurs in the water-refrigerant heat exchanger 3 housed in the box-shaped heat insulating material. Can be suppressed. That is, the heat pump hot water supply outdoor unit 1 according to the present embodiment can suppress corrosion of the water-refrigerant heat exchanger 3 more than before.
  • the concave portion 13 has an inclined surface 13a that is inclined so as to descend toward the drain hole 11.
  • the water accumulated in the concave portion 13 can be quickly discharged from the drain hole 11 to the outside of the lower heat insulating material 10 as compared with the case where the inclined surface 13a is not provided.
  • the recess 13 has the inclined surface 13a, it is possible to further suppress the water-refrigerant heat exchanger 3 from being immersed in water. That is, since the recess 13 has the inclined surface 13a, the corrosion of the water-refrigerant heat exchanger 3 can be further suppressed.
  • the concave portion 13 according to the present embodiment has a plurality of inclined surfaces 13a, the above-described effect can be obtained as long as it has at least one inclined surface 13a.
  • each drain hole 11 is formed at the lower end 13c of the inclined surface 13a.
  • each drain hole 11 is formed in a valley formed by the plurality of inclined surfaces 13a.
  • a part of the convex portion 12 is located at the vertex 13b of the inclined surface 13a. That is, a part of the convex portion 12 is disposed at the highest position in the concave portion 13.
  • the heat pump hot water supply outdoor unit 1 may be installed to be inclined in the left-right direction. In some cases, the heat pump hot water supply outdoor unit 1 is installed inclined in the front-rear direction. In some cases, the heat pump hot water supply outdoor unit 1 may be installed inclined in both the left-right direction and the front-back direction.
  • the concave portion 13 has a plurality of inclined surfaces 13a, by defining the inclination direction of the inclined surface 13a as described above, even when the heat pump hot water supply outdoor unit 1 is inclined and installed in any direction, the concave portion 13 Water accumulated in the lower heat insulating material 10 can be discharged more quickly.
  • the inner bottom part 10a of the lower heat insulating material 10 includes a plurality of convex parts 12, the number of the convex parts 12 is arbitrary.
  • the water-refrigerant heat exchanger 3 can be placed on one protrusion 12 by making the shape of the protrusion 12 substantially frame-shaped in plan view.
  • the inner bottom part 10a has a plurality of convex parts 12, it is preferable to arrange each convex part 12 as shown in FIG. 6 and FIG. More specifically, the plurality of protrusions 12 are preferably arranged at intervals in a direction that is the longitudinal direction of the water-refrigerant heat exchanger 3 when the water-refrigerant heat exchanger 3 is viewed in plan.
  • the deflection of the water-refrigerant heat exchanger 3 can be suppressed. That is, it is possible to prevent the water-refrigerant heat exchanger 3 from being bent and immersed in the water accumulated in the concave portion 13.
  • the corner 12 a of the convex portion 12 has an arc shape that is convex outside the convex portion 12.
  • the contact area between the water-refrigerant heat exchanger 3 and the upper surface of the protrusions 12 can be reduced.
  • the corners 12 a of the convex portion 12 have such a shape, the water that has flowed down from the water-refrigerant heat exchanger 3 to the upper surface of the convex portion 12 is less likely to remain on the upper surface of the convex portion 12.
  • the corner 12a of the convex part 12 into such a shape, the time during which the water-refrigerant heat exchanger 3 is in contact with water can be shortened, and the corrosion of the water-refrigerant heat exchanger 3 can be further suppressed. .
  • the heat pump hot water supply outdoor unit 1 includes a box-shaped heat insulator and a water-refrigerant heat exchanger 3 housed in the heat insulator and heating water with a refrigerant.
  • the inner bottom part 10 a of the lower heat insulating material 10 of the heat insulating material has an uneven shape having a convex part 12 and a concave part 13.
  • a drain hole 11 penetrating the inner bottom 10 a is formed.
  • the water-refrigerant heat exchanger 3 is placed on the convex portion 12 of the inner bottom portion 10a.
  • dew condensation occurs on the surface of the water-refrigerant heat exchanger 3, and water on the surface of the water-refrigerant heat exchanger 3 flows down to the inner bottom part 10 a of the lower heat insulating material 10. At this time, the water accumulates in the concave portion 13 of the inner bottom portion 10a. Then, the water accumulated in the concave portion 13 is discharged to the outside of the lower heat insulating material 10 from a drain hole 11 formed in the concave portion 13. The water-refrigerant heat exchanger 3 is raised with respect to the concave portion 13 by the convex portion 12.
  • the heat pump hot-water supply outdoor unit 1 according to the present embodiment has a configuration in which the water-refrigerant heat exchanger 3 has more water than the conventional case even when dew condensation occurs in the water-refrigerant heat exchanger 3 housed in the box-shaped heat insulating material. Can be suppressed. That is, the heat pump hot water supply outdoor unit 1 according to the present embodiment can suppress corrosion of the water-refrigerant heat exchanger 3 more than before.
  • 1 heat pump hot water supply outdoor unit 2 compressor, 3 water refrigerant heat exchanger, 3a water pipe, 3b refrigerant pipe, 4a first expansion valve, 4b second expansion valve, 5 evaporator, 6 internal heat exchanger, 7 air blower, 8 case, 9 upper heat insulator, 10 lower insulator, 10a inner bottom, 11 drain hole, 12 convex, 12a angular, 13 concave, 13a inclined surface, 13b vertex, 13c lower end, 14 machine room, 15 blower room , 16 partition, 17 electrical parts storage box, 18 bottom plate, 19 front panel, 20 side panel, 21 top panel, 22 service panel, 23 connection part cover, 24 grill, 25 leg, 90 heat pump hot water supply system, 91 tank unit , 92 hot water storage tank, 93 pump, 94 flow switching valve, 95 bypass pipe, 96 External piping, 97 external pipe, 98 tank upper tube.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Housings, Intake/Discharge, And Installation Of Fluid Heaters (AREA)

Abstract

A heat pump water heater outdoor unit according to the present invention includes a box-shaped heat insulating material, and a water-refrigerant heat exchanger that is housed in the heat insulating material and heats water with a refrigerant, wherein the inner bottom portion of the heat insulating material has concavo-convex shape having a convex portion and a concave portion, a drainage hole penetrating the inner bottom portion is formed in the concave portion, and the water-refrigerant heat exchanger is placed on the convex portion.

Description

ヒートポンプ給湯室外機Heat pump hot water outdoor unit
　本発明は、箱状の保温材に水冷媒熱交換器を収納し、水冷媒熱交換器から外部への放熱の低減を図ったヒートポンプ給湯室外機に関する。 The present invention relates to a heat pump hot water supply outdoor unit in which a water-refrigerant heat exchanger is housed in a box-shaped heat insulating material to reduce heat radiation from the water-refrigerant heat exchanger to the outside.
　大気の熱を利用する、エネルギー効率に優れたヒートポンプ給湯システムが広く用いられている。ヒートポンプ給湯システムが備えるヒートポンプ給湯室外機には、大気の熱を冷媒に吸収させる蒸発器、蒸発器へ送風する送風機、冷媒を圧縮する圧縮機、圧縮された高温高圧の冷媒で水を加熱する水冷媒熱交換器等が搭載されている。また、ヒートポンプ給湯室外機の運転中に水冷媒熱交換器から外部へ放熱してしまうことを低減するため、水冷媒熱交換器は、箱状の保温材に収納されている。水冷媒熱交換器が箱状の保温材に収納されている場合、以下のように水冷媒熱交換器が腐食する可能性がある。詳しくは、水冷媒熱交換器の表面に結露が発生すると、水冷媒熱交換器の表面の水が流れ落ちて保温材の内底部に溜まる。水冷媒熱交換器が保温材の内底部に溜まった水に浸ると、水冷媒熱交換器が腐食する可能性がある。このため、水冷媒熱交換器が保温材の内底部に溜まった水に浸らないようにすることが望ましい。なお、保温材の内底部とは、保温材の内部側の底部である。 エ ネ ル ギ ー Energy-efficient heat pump hot water supply systems that use atmospheric heat are widely used. The heat pump hot water supply outdoor unit included in the heat pump hot water supply system includes an evaporator that absorbs atmospheric heat into a refrigerant, a blower that blows air to the evaporator, a compressor that compresses the refrigerant, and water that heats water with the compressed high-temperature and high-pressure refrigerant. A refrigerant heat exchanger and the like are mounted. In addition, in order to reduce heat dissipation from the water-refrigerant heat exchanger to the outside during operation of the heat pump hot water supply outdoor unit, the water-refrigerant heat exchanger is housed in a box-shaped heat insulator. When the water-refrigerant heat exchanger is stored in a box-shaped heat insulating material, the water-refrigerant heat exchanger may be corroded as described below. Specifically, when dew condensation occurs on the surface of the water-refrigerant heat exchanger, water on the surface of the water-refrigerant heat exchanger flows down and accumulates on the inner bottom of the heat insulating material. If the water-refrigerant heat exchanger is immersed in the water accumulated in the inner bottom of the heat insulating material, the water-refrigerant heat exchanger may corrode. For this reason, it is desirable that the water-refrigerant heat exchanger should not be immersed in the water accumulated at the inner bottom of the heat insulating material. In addition, the inner bottom part of the heat insulating material is a bottom part on the inner side of the heat insulating material.
　そこで、従来のヒートポンプ給湯室外機には、水冷媒熱交換器が保温材の内底部に溜まった水に浸ることの抑制を図ったものが提案されている（特許文献１参照）。具体的には、特許文献１に記載のヒートポンプ給湯室外機においては、水冷媒熱交換器を収納する保温材は、下部保温材と上部保温材とで構成されている。下部保温材は、上部が開口し、左右方向に長い箱状の保温材である。上部保温材は、下部保温材の上部の開口を覆う保温材である。 Therefore, there has been proposed a conventional heat pump hot water supply outdoor unit in which the water refrigerant heat exchanger is suppressed from being immersed in water accumulated in the inner bottom of the heat insulating material (see Patent Document 1). Specifically, in the heat pump hot water supply outdoor unit described in Patent Literature 1, the heat insulating material that accommodates the water-refrigerant heat exchanger includes a lower heat insulating material and an upper heat insulating material. The lower heat insulating material is a box-shaped heat insulating material that is open at the top and is long in the left-right direction. The upper heat insulator is a heat insulator that covers the upper opening of the lower heat insulator.
　下部保温材の内底部は平坦部を有しており、水冷媒熱交換器は、該平坦部に置かれている。また、下部保温材の内底部には、該内底部へ水が溜まることを抑制するため、漏水排出部が設けられている。この漏水排出部は、下部保温材の内底部を貫通する貫通孔と、該貫通孔を封止する充填物とを備えている。特許文献１によると、このような構成により、下部保温材の内底部に流れ落ちた水は、充填物を浸透又は溶解しながら貫通孔を流れ、保温材の外部に排出されるとなっている。 内 The inner bottom of the lower heat insulating material has a flat portion, and the water-refrigerant heat exchanger is placed on the flat portion. In addition, a water leakage discharge portion is provided in the inner bottom of the lower heat insulating material in order to suppress accumulation of water in the inner bottom. The water leakage discharge section includes a through hole penetrating the inner bottom of the lower heat insulating material, and a filler sealing the through hole. According to Patent Literature 1, with such a configuration, water that has flowed down to the inner bottom of the lower heat insulating material flows through the through hole while permeating or dissolving the filler, and is discharged to the outside of the heat insulating material.
特開２０１５－４５４２５号公報Japanese Patent Application Laid-Open No. 2015-45425
　特許文献１に記載のヒートポンプ給湯室外機においては、水冷媒熱交換器が置かれている下部保温材の内底部の平坦部に、漏水排出部が設けられている。このため、水冷媒熱交換器の表面に結露が発生し、水冷媒熱交換器の表面の水が下部保温材の内底部の平坦部に流れ落ちると、該水が漏水排出部から排出されるまでの間、水冷媒熱交換器が該水に浸ることとなる。また、下部保温材の内底部において水冷媒熱交換器が置かれている箇所は上述のように平坦部であるため、平坦部に流れ落ちた水が該平坦部に留まりやすい。このため、該平坦部に一定量の水が溜まるまで、該平坦部に溜まった水が漏水排出部へ流れ込まない。したがって、特許文献１に記載のヒートポンプ給湯室外機は、水冷媒熱交換器が保温材の内底部に溜まった水に浸ることを未だ十分に抑制できず、水冷媒熱交換器の腐食を未だ十分に抑制できないという課題があった。 ヒ ー ト In the heat pump hot water supply outdoor unit described in Patent Literature 1, a water leakage discharge section is provided on a flat portion at the inner bottom of the lower heat insulating material on which the water / refrigerant heat exchanger is placed. For this reason, dew condensation occurs on the surface of the water-refrigerant heat exchanger, and when water on the surface of the water-refrigerant heat exchanger flows down to the flat part of the inner bottom of the lower heat insulating material, the water is discharged from the water leakage discharge part. During this time, the water refrigerant heat exchanger will be immersed in the water. In addition, since the portion where the water-refrigerant heat exchanger is placed on the inner bottom of the lower heat insulating material is a flat portion as described above, the water that has flowed down to the flat portion easily stays on the flat portion. For this reason, the water accumulated in the flat portion does not flow into the leak discharge portion until a certain amount of water is accumulated in the flat portion. Therefore, the heat pump hot water supply outdoor unit described in Patent Literature 1 still cannot sufficiently prevent the water refrigerant heat exchanger from being immersed in the water accumulated in the inner bottom of the heat insulating material, and still has sufficient corrosion of the water refrigerant heat exchanger. There was a problem that it could not be suppressed.
　本発明は、上述のような課題を解決するためになされたもので、箱状の保温材に収納された水冷媒熱交換器に結露が発生した場合でも、従来よりも水冷媒熱交換器が水に浸ることを抑制できるヒートポンプ給湯室外機を提供することを目的とする。 The present invention has been made in order to solve the above-described problems, and even when dew condensation occurs in the water-refrigerant heat exchanger stored in the box-shaped heat insulating material, the water-refrigerant heat exchanger has a more An object of the present invention is to provide a heat pump hot water supply outdoor unit that can suppress immersion in water.
　本発明に係るヒートポンプ給湯室外機は、箱状の保温材と、前記保温材に収納され、冷媒で水を加熱する水冷媒熱交換器と、を備え、前記保温材の内底部は、凸部及び凹部を有する凹凸形状となっており、前記凹部には、前記内底部を貫通する排水穴が形成され、前記水冷媒熱交換器は、前記凸部の上に置かれている。 The heat pump hot water supply outdoor unit according to the present invention includes a box-shaped heat insulating material, and a water-refrigerant heat exchanger that is housed in the heat insulating material and heats water with a refrigerant, and an inner bottom portion of the heat insulating material has a convex portion. And a concave / convex shape having a concave portion, wherein the concave portion is formed with a drain hole penetrating the inner bottom portion, and the water / refrigerant heat exchanger is placed on the convex portion.
　本発明に係るヒートポンプ給湯室外機においては、水冷媒熱交換器の表面に結露が発生し、水冷媒熱交換器の表面の水が保温材の内底部に流れ落ちた際、該水は内底部の凹部に溜まる。そして、該凹部に溜まった水は、該凹部に形成された排水穴から保温材の外部へ排出される。このため、本発明に係るヒートポンプ給湯室外機は、箱状の保温材に収納された水冷媒熱交換器に結露が発生した場合でも、従来よりも水冷媒熱交換器が水に浸ることを抑制できる。 In the heat pump hot water supply outdoor unit according to the present invention, dew condensation occurs on the surface of the water-refrigerant heat exchanger, and when water on the surface of the water-refrigerant heat exchanger flows down to the inner bottom of the heat insulating material, the water is removed from the inner bottom. Collect in the recess. Then, the water accumulated in the concave portion is discharged to the outside of the heat insulating material from a drain hole formed in the concave portion. For this reason, the heat pump hot-water supply outdoor unit according to the present invention suppresses the water-refrigerant heat exchanger from being immersed in water as compared with the related art even when dew condensation occurs in the water-refrigerant heat exchanger stored in the box-shaped heat insulating material. it can.
本発明の実施の形態に係るヒートポンプ給湯室外機を備えたヒートポンプ給湯システムを示す配管系統図である。It is a piping system figure showing the heat pump hot water supply system provided with the heat pump hot water supply outdoor unit concerning an embodiment of the invention. 本発明の実施の形態に係るヒートポンプ給湯室外機を前方右側から観察した斜視図である。It is the perspective view which looked at the heat pump hot-water supply outdoor unit which concerns on embodiment of this invention from the front right side. 本発明の実施の形態に係るヒートポンプ給湯室外機を前方右側から観察した分解斜視図である。It is the disassembled perspective view which observed the heat pump hot-water supply outdoor unit which concerns on embodiment of this invention from the front right side. 本発明の実施の形態に係るヒートポンプ給湯室外機が備える底板、上部保温材、下部保温材及び水冷媒熱交換器等を前方右側から観察した斜視図である。It is the perspective view which looked at the bottom plate, the upper heat insulation material, the lower heat insulation material, the water-refrigerant heat exchanger, etc. with which the heat pump hot-water supply outdoor unit which concerns on embodiment of this invention is provided from the front right side. 本発明の実施の形態に係るヒートポンプ給湯室外機が備える底板、下部保温材及び水冷媒熱交換器等を前方右側から観察した斜視図である。It is the perspective view which looked at the bottom plate with which the heat pump hot-water supply outdoor unit concerning embodiment of this invention is provided, a lower heat insulating material, a water-refrigerant heat exchanger, etc. from the front right side. 本発明の実施の形態に係るヒートポンプ給湯室外機が備える下部保温材を前方右側から観察した斜視図である。It is the perspective view which looked at the lower heat insulating material with which the heat pump hot-water supply outdoor unit concerning embodiment of this invention was provided from the front right side. 本発明の実施の形態に係るヒートポンプ給湯室外機が備える下部保温材を、該下部保温材の短手方向に平行な垂直平面で切断した縦断面図である。It is the longitudinal cross-sectional view which cut | disconnected the lower heat insulating material with which the heat pump hot-water supply outdoor unit which concerns on embodiment of this invention with the vertical plane parallel to the short direction of this lower heat insulating material. 本発明の実施の形態に係るヒートポンプ給湯室外機が備える下部保温材を、該下部保温材の長手方向に平行な垂直平面で切断した縦断面図である。It is the longitudinal cross-sectional view which cut | disconnected the lower heat insulation material with which the heat pump hot-water supply outdoor unit which concerns on embodiment of this invention with the vertical plane parallel to the longitudinal direction of this lower heat insulation material.
　以下の実施の形態において、図面を参照しながら本発明に係るヒートポンプ給湯室外機の一例について説明する。なお、各図において共通する要素には、同一の符号を付して、重複する説明を簡略化又は省略する。また、本発明に係るヒートポンプ給湯室外機は、以下で説明する構成のうち、組合せ可能な構成のあらゆる組合せを含み得る。 In the following embodiments, an example of a heat pump hot water supply outdoor unit according to the present invention will be described with reference to the drawings. Elements common to the drawings are denoted by the same reference numerals, and redundant description will be simplified or omitted. Further, the heat pump hot water supply outdoor unit according to the present invention may include any combination of configurations that can be combined among the configurations described below.
実施の形態．
　図１は、本発明の実施の形態に係るヒートポンプ給湯室外機を備えたヒートポンプ給湯システムを示す配管系統図である。図１に示すように、ヒートポンプ給湯システム９０は、ヒートポンプ給湯室外機１と、タンクユニット９１とを備えている。ヒートポンプ給湯室外機１は、室外に設置される。タンクユニット９１は、室外に設置されてもよいし、室内に設置されてもよい。 Embodiment.
FIG. 1 is a piping diagram illustrating a heat pump hot water supply system including a heat pump hot water supply outdoor unit according to an embodiment of the present invention. As shown in FIG. 1, the heat pump hot water supply system 90 includes the heat pump hot water supply outdoor unit 1 and a tank unit 91. The heat pump hot water supply outdoor unit 1 is installed outside the room. The tank unit 91 may be installed outdoors or may be installed indoors.
　ヒートポンプ給湯室外機１は、圧縮機２、水冷媒熱交換器３、第一膨張弁４ａ、第二膨張弁４ｂ、蒸発器５、内部熱交換器６、及び送風機７を備えている。ヒートポンプ給湯室外機１は、冷媒回路を備え、冷凍サイクルすなわちヒートポンプサイクルの運転を行う。圧縮機２は、低圧冷媒を圧縮する。冷媒は、例えば二酸化炭素でもよい。水冷媒熱交換器３は、圧縮機２から吐出された高温高圧の冷媒が流れる冷媒配管３ｂと、タンクユニット９１から供給された水が流れる水配管３ａとを備えている。そして、水冷媒熱交換器３では、冷媒配管３ｂを流れる高温高圧の冷媒と、水配管３ａを流れる水との間で、熱交換が行われる。すなわち、水配管３ａを流れる水は、冷媒配管３ｂを流れる高温高圧の冷媒によって加熱される。 The heat pump hot water supply outdoor unit 1 includes a compressor 2, a water refrigerant heat exchanger 3, a first expansion valve 4a, a second expansion valve 4b, an evaporator 5, an internal heat exchanger 6, and a blower 7. The heat pump hot water supply outdoor unit 1 includes a refrigerant circuit and operates a refrigeration cycle, that is, a heat pump cycle. The compressor 2 compresses the low-pressure refrigerant. The refrigerant may be, for example, carbon dioxide. The water-refrigerant heat exchanger 3 includes a refrigerant pipe 3b through which high-temperature and high-pressure refrigerant discharged from the compressor 2 flows, and a water pipe 3a through which water supplied from the tank unit 91 flows. In the water-refrigerant heat exchanger 3, heat exchange is performed between the high-temperature and high-pressure refrigerant flowing through the refrigerant pipe 3b and the water flowing through the water pipe 3a. That is, the water flowing through the water pipe 3a is heated by the high-temperature and high-pressure refrigerant flowing through the refrigerant pipe 3b.
　第一膨張弁４ａ及び第二膨張弁４ｂは、高圧冷媒を減圧して低圧冷媒にする減圧装置の例である。減圧された低圧冷媒は、気液二相の状態になる。蒸発器５は、低圧冷媒と大気との間で熱を交換する熱交換器である。蒸発器５において、低圧冷媒は、大気の熱を吸収することで蒸発する。送風機７が蒸発器５へ送風することで、蒸発器５での熱交換を促進できる。内部熱交換器６は、高圧流路及び低圧流路を備える。内部熱交換器６は、高圧流路を流れる高圧冷媒と、低圧流路を流れる低圧冷媒との間で熱を交換する。蒸発器５で蒸発した低圧冷媒は、内部熱交換器６の低圧流路を経由して、圧縮機２に吸入される。 The first expansion valve 4a and the second expansion valve 4b are examples of a decompression device that decompresses a high-pressure refrigerant into a low-pressure refrigerant. The decompressed low-pressure refrigerant is in a gas-liquid two-phase state. The evaporator 5 is a heat exchanger that exchanges heat between the low-pressure refrigerant and the atmosphere. In the evaporator 5, the low-pressure refrigerant evaporates by absorbing atmospheric heat. By the blower 7 blowing air to the evaporator 5, heat exchange in the evaporator 5 can be promoted. The internal heat exchanger 6 includes a high-pressure channel and a low-pressure channel. The internal heat exchanger 6 exchanges heat between the high-pressure refrigerant flowing through the high-pressure flow path and the low-pressure refrigerant flowing through the low-pressure flow path. The low-pressure refrigerant evaporated in the evaporator 5 is sucked into the compressor 2 via the low-pressure flow path of the internal heat exchanger 6.
　タンクユニット９１は、貯湯タンク９２、ポンプ９３、流路切替弁９４、及びバイパス配管９５を備えている。ヒートポンプ給湯室外機１とタンクユニット９１との間は、外部配管９６及び外部配管９７を介して接続されている。 The tank unit 91 includes a hot water storage tank 92, a pump 93, a flow path switching valve 94, and a bypass pipe 95. The heat pump hot water supply outdoor unit 1 and the tank unit 91 are connected via an external pipe 96 and an external pipe 97.
　貯湯タンク９２内には、加熱前の水及び加熱後の湯が貯留される。貯湯タンク９２内には、温度による水の比重の違いにより、上側が高温で下側が低温の温度成層が形成される。貯湯タンク９２の上部には、例えば給湯栓、シャワー、及び浴槽等の端末へ給湯するための図示せぬ給湯管が接続されている。貯湯タンク９２の下部には、水道等の水源からの水を供給する図示せぬ給水管が接続されている。貯湯タンク９２から給湯するときには、給水管から貯湯タンク９２内に作用する水圧により、貯湯タンク９２の上部の湯が給湯管へ送出される。給湯管へ流出した湯と同量の水が給水管から貯湯タンク９２内に流入することで、貯湯タンク９２内が満水状態に維持される。 水 In the hot water storage tank 92, water before heating and hot water after heating are stored. In the hot water storage tank 92, a temperature stratification with a high temperature on the upper side and a low temperature on the lower side is formed due to a difference in specific gravity of water depending on the temperature. A hot water supply pipe (not shown) for supplying hot water to terminals such as a hot water tap, a shower, and a bathtub is connected to an upper portion of the hot water storage tank 92. A water supply pipe (not shown) for supplying water from a water source such as a tap is connected to a lower portion of the hot water storage tank 92. When hot water is supplied from the hot water storage tank 92, hot water above the hot water storage tank 92 is sent to the hot water supply pipe by water pressure acting on the hot water storage tank 92 from the water supply pipe. When the same amount of water as the hot water that has flowed into the hot water supply pipe flows into the hot water storage tank 92 from the water supply pipe, the inside of the hot water storage tank 92 is maintained in a full state.
　貯湯タンク９２の下部は、導管を介してポンプ９３の入口につながっている。ポンプ９３の出口は、流路切替弁９４につながっている。流路切替弁９４は、外部配管９６を介して、ヒートポンプ給湯室外機１の水冷媒熱交換器３の水配管３ａにつながっている。 下部 The lower part of the hot water storage tank 92 is connected to the inlet of the pump 93 via a conduit. The outlet of the pump 93 is connected to a flow path switching valve 94. The flow path switching valve 94 is connected to the water pipe 3a of the water / refrigerant heat exchanger 3 of the heat pump hot water supply outdoor unit 1 via an external pipe 96.
　ヒートポンプ給湯システム９０は、ヒートポンプ給湯室外機１により加熱された湯を貯湯タンク９２内に蓄積する蓄熱運転を実施できる。蓄熱運転のときには、以下のようになる。圧縮機２、送風機７、及びポンプ９３が運転される。貯湯タンク９２の下部から流出した水が、ポンプ９３、流路切替弁９４、及び外部配管９６を通って、ヒートポンプ給湯室外機１の水冷媒熱交換器３に流入する。この水は、水冷媒熱交換器３にて冷媒により加熱されて湯になる。水冷媒熱交換器３で加熱された湯の温度は、例えば、６５℃～９０℃程度である。水冷媒熱交換器３から流出した湯は、外部配管９７を通ってタンクユニット９１に戻り、タンク上部管９８を通って貯湯タンク９２の上部に流入する。 The heat pump hot water supply system 90 can perform a heat storage operation of storing hot water heated by the heat pump hot water supply outdoor unit 1 in the hot water storage tank 92. At the time of the heat storage operation, it becomes as follows. The compressor 2, the blower 7, and the pump 93 are operated. The water flowing out from the lower part of the hot water storage tank 92 flows into the water / refrigerant heat exchanger 3 of the heat pump hot water supply outdoor unit 1 through the pump 93, the flow path switching valve 94, and the external pipe 96. This water is heated by the refrigerant in the water-refrigerant heat exchanger 3 to become hot water. The temperature of the hot water heated by the water-refrigerant heat exchanger 3 is, for example, about 65 ° C. to 90 ° C. Hot water flowing out of the water-refrigerant heat exchanger 3 returns to the tank unit 91 through the external pipe 97 and flows into the upper portion of the hot water storage tank 92 through the tank upper pipe 98.
　流路切替弁９４は、ポンプ９３から吐出された水が、ヒートポンプ給湯室外機１に代えてバイパス配管９５を通ってタンク上部管９８に流入する状態になるように流路を切り替え可能である。 The flow path switching valve 94 can switch the flow path so that the water discharged from the pump 93 flows into the tank upper pipe 98 through the bypass pipe 95 instead of the heat pump hot water supply outdoor unit 1.
　図２は、本発明の実施の形態に係るヒートポンプ給湯室外機を前方右側から観察した斜視図である。図３は、本発明の実施の形態に係るヒートポンプ給湯室外機を前方右側から観察した分解斜視図である。図２に示すように、ヒートポンプ給湯室外機１は、複数の脚部２５を備えている。脚部２５は、地面又は床面に固定される。 FIG. 2 is a perspective view of the heat pump hot water supply outdoor unit according to the embodiment of the present invention as viewed from the front right side. FIG. 3 is an exploded perspective view of the heat pump hot water supply outdoor unit according to the embodiment of the present invention, as viewed from the front right side. As shown in FIG. 2, the heat pump hot water supply outdoor unit 1 includes a plurality of legs 25. The leg 25 is fixed to the ground or the floor.
　図３に示すように、ヒートポンプ給湯室外機１は、底板１８、フロントパネル１９、サイドパネル２０、及びトップパネル２１を備えている。底板１８、フロントパネル１９、サイドパネル２０、及びトップパネル２１は、ヒートポンプ給湯室外機１の外郭すなわち筐体を構成する。底板１８、フロントパネル１９、サイドパネル２０、及びトップパネル２１は、金属製が好ましい。底板１８は、ヒートポンプ給湯室外機１のベース又はフレームに相当する。圧縮機２等の構成機器は、底板１８の上に搭載される。底板１８の下面に脚部２５が固定されている。 ヒ ー ト As shown in FIG. 3, the heat pump hot water supply outdoor unit 1 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 of the heat pump hot water supply outdoor unit 1, that is, a housing. The bottom plate 18, the front panel 19, the side panels 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 hot water supply outdoor unit 1. The components such as the compressor 2 are mounted on the bottom plate 18. The leg 25 is fixed to the lower surface of the bottom plate 18.
　フロントパネル１９は、ヒートポンプ給湯室外機１の前面及び左側面を覆う。サイドパネル２０は、ヒートポンプ給湯室外機１の後面の一部及び右側面を覆う。トップパネル２１は、ヒートポンプ給湯室外機１の上面を覆う。蒸発器５は、ヒートポンプ給湯室外機１の後面及び左側面を覆うように配置される。 The front panel 19 covers the front and left sides of the heat pump hot water supply outdoor unit 1. The side panel 20 covers a part of the rear surface and the right side surface of the heat pump hot water supply outdoor unit 1. The top panel 21 covers the upper surface of the heat pump hot water supply outdoor unit 1. The evaporator 5 is disposed so as to cover the rear surface and the left side surface of the heat pump hot water supply outdoor unit 1.
　ヒートポンプ給湯室外機１の外郭の内部は、送風機７がある送風機室１５と、機械室１４とに区画されている。仕切板１６が送風機室１５と機械室１４とを隔てる。機械室１４には、圧縮機２及び冷媒配管等が配置されている。圧縮機２は図示せぬ防音材に覆われている。送風機室１５には、蒸発器５とフロントパネル１９との間に、送風機７が配置されている。本実施の形態における送風機７は、プロペラファンを備えている。また、送風機室１５には、送風機７の下にケース８が配置されている。水冷媒熱交換器３は、後述する上部保温材９及び下部保温材１０に覆われた状態で、ケース８内に収納されている。 The inside of the outer shell of the heat pump hot water supply outdoor unit 1 is divided into a blower room 15 in which the blower 7 is provided and a machine room 14. A partition plate 16 separates the blower room 15 from the machine room 14. In the machine room 14, the compressor 2, a refrigerant pipe, and the like are arranged. The compressor 2 is covered with a soundproof material (not shown). In the blower room 15, the blower 7 is arranged between the evaporator 5 and the front panel 19. Blower 7 in the present embodiment includes a propeller fan. In the blower room 15, a case 8 is arranged below the blower 7. The water-refrigerant heat exchanger 3 is housed in a case 8 while being covered with an upper heat insulating material 9 and a lower heat insulating material 10 described later.
　フロントパネル１９は、送風機７と対向する位置に開口部が形成されている。この開口部を覆うグリル２４がフロントパネル１９に取り付けられている。送風機７が運転されると、外気すなわち大気が、蒸発器５を通過して送風機室１５に流入し、グリル２４からヒートポンプ給湯室外機１の外へ排出される。 開口 The front panel 19 has an opening at a position facing the blower 7. A grill 24 covering this opening is attached to the front panel 19. When the blower 7 is operated, the outside air, that is, the atmosphere, flows into the blower room 15 through the evaporator 5 and is discharged from the grill 24 to the outside of the heat pump hot water supply room outdoor unit 1.
　ヒートポンプ給湯室外機１は、電気部品収納箱１７を備えている。電気部品収納箱１７は、送風機室１５の上部の一部及び機械室１４の上部を占める空間に配置されている。電気部品収納箱１７内には、例えば、圧縮機２のモーター及び送風機７のモーターを駆動制御するインバータ電源等の電気部品が収納されている。電気部品収納箱１７の近くには端子台がある。外部の電気配線を電気部品収納箱１７内の電気部品と接続する際、該端子台が用いられる。サービスパネル２２がサイドパネル２０に対して着脱可能に取り付けられている。サービスパネル２２は、端子台を保護している。サービスパネル２２の下には、接続部カバー２３がサイドパネル２０に対して着脱可能に取り付けられている。接続部カバー２３は、外部配管９６及び外部配管９７が接続される図示せぬ接続部を保護している。 The heat pump hot water supply outdoor unit 1 includes an electric component storage box 17. The electric component storage box 17 is disposed in a space occupying a part of an upper part of the blower room 15 and an upper part of the machine room 14. In the electric component storage box 17, for example, electric components such as an inverter power supply for driving and controlling the motor of the compressor 2 and the motor of the blower 7 are stored. There is a terminal block near the electric component storage box 17. The terminal block is used when connecting external electric wiring to electric components in the electric component storage box 17. A service panel 22 is detachably attached to the side panel 20. The service panel 22 protects the terminal block. Below the service panel 22, a connection cover 23 is detachably attached to the side panel 20. The connection part cover 23 protects a connection part (not shown) to which the external pipe 96 and the external pipe 97 are connected.
　図４は、本発明の実施の形態に係るヒートポンプ給湯室外機が備える底板、上部保温材、下部保温材及び水冷媒熱交換器等を前方右側から観察した斜視図である。図４に示すように、底板１８は、例えば１ｃｍ程度の高低差を有する凹凸、段差、斜面等が複数形成された形状を有する。底板１８は、例えば絞り加工等のプレス加工により形成されたものでもよい。底板１８は、遮水性を有する。 FIG. 4 is a perspective view of a bottom plate, an upper heat insulating material, a lower heat insulating material, a water-refrigerant heat exchanger, and the like included in the heat pump hot water supply outdoor unit according to the embodiment of the present invention, as viewed from the front right side. As shown in FIG. 4, the bottom plate 18 has a shape in which a plurality of irregularities, steps, slopes, and the like having a height difference of, for example, about 1 cm are formed. The bottom plate 18 may be formed by press working such as drawing. The bottom plate 18 has water shielding.
　底板１８には、図示せぬ排水口が形成されている。この排水口は、底板１８のうちで最も低い位置にあることが望ましい。ヒートポンプ給湯室外機１の運転時、蒸発器５は低温になるため、蒸発器５を通過する空気に含まれる水分が蒸発器５の表面で凝縮することがある。その凝縮水は、重力により流下する。底板１８は、その水を受ける。その水は、底板１８に形成された高低差によって排水口の位置へ向かって流れ、排水口から底板１８の下へ排出される。 排水 A drain port (not shown) is formed in the bottom plate 18. This drain port is desirably at the lowest position of the bottom plate 18. During operation of the heat pump hot water supply outdoor unit 1, the temperature of the evaporator 5 becomes low, so that moisture contained in the air passing through the evaporator 5 may condense on the surface of the evaporator 5. The condensed water flows down by gravity. The bottom plate 18 receives the water. The water flows toward the position of the drain port due to the height difference formed in the bottom plate 18, and is discharged from the drain port to below the bottom plate 18.
　ヒートポンプ給湯室外機１が設置される場所には、排水口から排出される水を受けるホッパー等が備えられてもよい。底板１８に排水口を形成することにより、以下の効果が得られる。蒸発器５の表面で生じた凝縮水等を底板１８が集めて排水口からヒートポンプ給湯室外機１の外へ排水するので、排水口以外の箇所から水が出ることを防止できる。ヒートポンプ給湯室外機１の水漏れではないかとユーザが誤解することを確実に防止できる。 場所 A place where the heat pump hot water supply outdoor unit 1 is installed may be provided with a hopper or the like for receiving water discharged from the drain port. By forming the drain port in the bottom plate 18, the following effects can be obtained. The condensed water and the like generated on the surface of the evaporator 5 are collected by the bottom plate 18 and drained from the drain to the outside of the heat pump hot water supply outdoor unit 1, so that water can be prevented from flowing out of a portion other than the drain. The user can be reliably prevented from misunderstanding that there is a water leak in the heat pump hot water supply outdoor unit 1.
　水冷媒熱交換器３は、箱状の保温材に収納されることにより、ヒートポンプ給湯室外機１の運転時に外部への放熱を低減することができる。本実施の形態における箱状の保温材は、上下に２分割された構成であり、内側に水冷媒熱交換器３を収納する箱状の下部保温材１０と、その上面側を覆う蓋状の上部保温材９で構成されている。 Since the water-refrigerant heat exchanger 3 is housed in a box-shaped heat insulating material, heat radiation to the outside can be reduced when the heat pump hot water supply outdoor unit 1 is operated. The box-shaped heat insulating material in the present embodiment has a vertically divided structure, and has a box-shaped lower heat insulating material 10 that houses the water-refrigerant heat exchanger 3 inside, and a lid-shaped heat insulating material that covers the upper surface thereof. It is composed of an upper heat insulating material 9.
　図５は、本発明の実施の形態に係るヒートポンプ給湯室外機が備える底板、下部保温材及び水冷媒熱交換器等を前方右側から観察した斜視図である。なお、図５に矢印で示すＤ１方向は、ヒートポンプ給湯室外機１の左右方向を表している。すなわち、Ｄ１方向は、下部保温材１０及び水冷媒熱交換器３の左右方向を表している。また、図５に矢印で示すＤ２方向は、ヒートポンプ給湯室外機１の前後方向を表している。すなわち、Ｄ２方向は、下部保温材１０及び水冷媒熱交換器３の前後方向を表している。 FIG. 5 is a perspective view of a bottom plate, a lower heat insulating material, a water-refrigerant heat exchanger, and the like included in the heat pump hot water supply outdoor unit according to the embodiment of the present invention, as viewed from the front right side. The direction D1 indicated by an arrow in FIG. 5 indicates the left-right direction of the heat pump hot water supply outdoor unit 1. That is, the direction D1 indicates the left-right direction of the lower heat insulating material 10 and the water-refrigerant heat exchanger 3. The direction D2 indicated by an arrow in FIG. 5 indicates the front-back direction of the heat pump hot water supply outdoor unit 1. That is, the direction D2 indicates the front-back direction of the lower heat insulating material 10 and the water-refrigerant heat exchanger 3.
　下部保温材１０の内部空間は、左右方向に長い略直方体形状となっている。水冷媒熱交換器３は、下部保温材１０の内底部１０ａに置かれている。なお、下部保温材１０の内底部１０ａとは、下部保温材１０の内部側の底部である。水冷媒熱交換器３は、二重管式等の管状熱交換器である。水冷媒熱交換器３は、下部保温材１０の内部空間の形状に対応した長方形状に折り曲げられながら、上下方向に積層された構造となっている。すなわち、水冷媒熱交換器３は、平面視した際、左右方向が長手方向となっており、前後方向が短手方向となっている。 内部 The internal space of the lower heat insulating material 10 has a substantially rectangular parallelepiped shape that is long in the left-right direction. The water-refrigerant heat exchanger 3 is placed on the inner bottom 10 a of the lower heat insulating material 10. Note that the inner bottom portion 10 a of the lower heat insulating material 10 is a bottom portion on the inner side of the lower heat insulating material 10. The water refrigerant heat exchanger 3 is a tubular heat exchanger such as a double tube type. The water-refrigerant heat exchanger 3 is structured to be vertically stacked while being bent into a rectangular shape corresponding to the shape of the internal space of the lower heat insulating material 10. That is, when the water-refrigerant heat exchanger 3 is viewed in plan, the left-right direction is the longitudinal direction, and the front-rear direction is the short direction.
　図６は、本発明の実施の形態に係るヒートポンプ給湯室外機が備える下部保温材を前方右側から観察した斜視図である。図７は、本発明の実施の形態に係るヒートポンプ給湯室外機が備える下部保温材を、該下部保温材の短手方向に平行な垂直平面で切断した縦断面図である。また、図８は、本発明の実施の形態に係るヒートポンプ給湯室外機が備える下部保温材を、該下部保温材の長手方向に平行な垂直平面で切断した縦断面図である。 FIG. 6 is a perspective view of the lower heat insulating material provided in the heat pump hot water supply outdoor unit according to the embodiment of the present invention, as viewed from the front right side. FIG. 7 is a vertical cross-sectional view of the lower heat insulating material provided in the heat pump hot water supply outdoor unit according to the embodiment of the present invention, which is cut by a vertical plane parallel to the shorter direction of the lower heat insulating material. FIG. 8 is a longitudinal sectional view of the lower heat insulating material provided in the heat pump hot water supply outdoor unit according to the embodiment of the present invention, which is cut by a vertical plane parallel to the longitudinal direction of the lower heat insulating material.
　下部保温材１０の内底部１０ａは、凸部１２及び凹部１３を有する凹凸形状となっている。詳しくは、下部保温材１０の内底部１０ａは、該下部保温材１０を平面視した際に短手方向となる方向に延びる複数の凸部１２を備えている。これら複数の凸部１２は、所定の間隔を空けて配置されている。これら複数の凸部１２の間にはこれら複数の凸部１２よりも低い箇所が形成され、該箇所が凹部１３となっている。凹部１３には、内底部１０ａを貫通する少なくとも１つの排水穴１１が形成されている。なお、本実施の形態１では、複数の排水穴１１が形成されている。そして、水冷媒熱交換器３は、複数の凸部１２の上に置かれる。 内 The inner bottom portion 10a of the lower heat insulating material 10 has an uneven shape having a convex portion 12 and a concave portion 13. More specifically, the inner bottom portion 10a of the lower heat insulating material 10 includes a plurality of convex portions 12 extending in a direction that is shorter when the lower heat insulating material 10 is viewed in plan. The plurality of protrusions 12 are arranged at predetermined intervals. A portion lower than the plurality of protrusions 12 is formed between the plurality of protrusions 12, and the portion serves as a recess 13. At least one drainage hole 11 penetrating the inner bottom portion 10a is formed in the recess 13. In the first embodiment, a plurality of drain holes 11 are formed. Then, the water-refrigerant heat exchanger 3 is placed on the plurality of protrusions 12.
　このため、本実施の形態に係るヒートポンプ給湯室外機１においては、水冷媒熱交換器３の表面に結露が発生し、水冷媒熱交換器３の表面の水が下部保温材１０の内底部１０ａに流れ落ちた際、該水は内底部１０ａの凹部１３に溜まる。そして、該凹部１３に溜まった水は、該凹部１３に形成された排水穴１１から下部保温材１０の外部へ排出される。水冷媒熱交換器３は、凸部１２によって、凹部１３に対して嵩上げされている。このため、本実施の形態に係るヒートポンプ給湯室外機１は、箱状の保温材に収納された水冷媒熱交換器３に結露が発生した場合でも、従来よりも水冷媒熱交換器３が水に浸ることを抑制できる。すなわち、本実施の形態に係るヒートポンプ給湯室外機１は、水冷媒熱交換器３の腐食を従来よりも抑制することができる。 For this reason, in the heat pump hot-water supply outdoor unit 1 according to the present embodiment, dew condensation occurs on the surface of the water-refrigerant heat exchanger 3, and the water on the surface of the water-refrigerant heat exchanger 3 is removed by the inner bottom 10 a of the lower heat insulating material 10. When the water flows down, the water accumulates in the concave portion 13 of the inner bottom portion 10a. Then, the water accumulated in the concave portion 13 is discharged to the outside of the lower heat insulating material 10 from a drain hole 11 formed in the concave portion 13. The water-refrigerant heat exchanger 3 is raised with respect to the concave portion 13 by the convex portion 12. For this reason, the heat pump hot-water supply outdoor unit 1 according to the present embodiment has a configuration in which the water-refrigerant heat exchanger 3 has more water than the conventional case even when dew condensation occurs in the water-refrigerant heat exchanger 3 housed in the box-shaped heat insulating material. Can be suppressed. That is, the heat pump hot water supply outdoor unit 1 according to the present embodiment can suppress corrosion of the water-refrigerant heat exchanger 3 more than before.
　なお、排水穴１１から下部保温材１０の外部へ排出された水は、底板１８に流れ落ちる。底板１８に流れ落ちた水は、上述のように、底板１８に形成された高低差によって排水口の位置へ向かって流れ、排水口から底板１８の下へ排出される。 The water discharged from the drain hole 11 to the outside of the lower heat insulating material 10 flows down to the bottom plate 18. The water that has flowed down to the bottom plate 18 flows toward the position of the drain port due to the height difference formed in the bottom plate 18 as described above, and is discharged from the drain port to below the bottom plate 18.
　また、本実施の形態においては、凹部１３は、排水穴１１に向かって下降するように傾斜する傾斜面１３ａを備えている。傾斜面１３ａを備えることにより、傾斜面１３ａを備えない場合と比べ、凹部１３に溜まった水を排水穴１１から下部保温材１０の外部へ速やかに排出することができる。このため、凹部１３が傾斜面１３ａを備えることにより、水冷媒熱交換器３が水に浸ることをより抑制できる。すなわち、凹部１３が傾斜面１３ａを備えることにより、水冷媒熱交換器３の腐食をより抑制することができる。なお、本実施の形態に係る凹部１３は複数の傾斜面１３ａを有しているが、少なくとも１つの傾斜面１３ａを有していれば、上述の効果を得ることができる。 In addition, in the present embodiment, the concave portion 13 has an inclined surface 13a that is inclined so as to descend toward the drain hole 11. By providing the inclined surface 13a, the water accumulated in the concave portion 13 can be quickly discharged from the drain hole 11 to the outside of the lower heat insulating material 10 as compared with the case where the inclined surface 13a is not provided. For this reason, since the recess 13 has the inclined surface 13a, it is possible to further suppress the water-refrigerant heat exchanger 3 from being immersed in water. That is, since the recess 13 has the inclined surface 13a, the corrosion of the water-refrigerant heat exchanger 3 can be further suppressed. In addition, although the concave portion 13 according to the present embodiment has a plurality of inclined surfaces 13a, the above-described effect can be obtained as long as it has at least one inclined surface 13a.
　また、本実施の形態においては、各排水穴１１は、傾斜面１３ａの下端部１３ｃに形成されている。換言すると、複数の傾斜面１３ａを有する本実施の形態に係る凹部１３においては、複数の傾斜面１３ａによって形成される谷部に、各排水穴１１が形成されている。傾斜面１３ａの下端部１３ｃに排水穴１１を形成することにより、凹部１３に溜まった水を排水穴１１から下部保温材１０の外部へさらに速やかに排出することができ、水冷媒熱交換器３の腐食をさらに抑制することができる。すなわち、傾斜面１３ａの下端部１３ｃに排水穴１１を形成することにより、水冷媒熱交換器３の腐食をさらに抑制することができる。なお、排水穴１１のうちの少なくとも１つが傾斜面１３ａの下端部１３ｃに形成されていれば、当該効果を得ることができる。 In the present embodiment, each drain hole 11 is formed at the lower end 13c of the inclined surface 13a. In other words, in the recess 13 having the plurality of inclined surfaces 13a according to the present embodiment, each drain hole 11 is formed in a valley formed by the plurality of inclined surfaces 13a. By forming the drain hole 11 at the lower end portion 13c of the inclined surface 13a, the water accumulated in the concave portion 13 can be discharged from the drain hole 11 to the outside of the lower heat insulating material 10 more quickly. Corrosion can be further suppressed. That is, by forming the drain hole 11 at the lower end 13c of the inclined surface 13a, the corrosion of the water-refrigerant heat exchanger 3 can be further suppressed. The effect can be obtained if at least one of the drain holes 11 is formed at the lower end 13c of the inclined surface 13a.
　また、本実施の形態においては、下部保温材１０を平面視した際、凸部１２の一部は、傾斜面１３ａの頂点１３ｂに位置している。すなわち、凸部１２の一部は、凹部１３において最も高くなっている箇所に配置されている。このように凸部１２を配置することにより、凹部１３からの凸部１２の突出高さを低く抑えることができるため、下部保温材１０の材料コストを抑制することができる。 In addition, in the present embodiment, when the lower heat insulating material 10 is viewed in a plan view, a part of the convex portion 12 is located at the vertex 13b of the inclined surface 13a. That is, a part of the convex portion 12 is disposed at the highest position in the concave portion 13. By arranging the protruding portions 12 in this manner, the height of the protruding portions 12 protruding from the recessed portions 13 can be suppressed low, so that the material cost of the lower heat insulating material 10 can be suppressed.
　また、複数の傾斜面１３ａを有する本実施の形態に係る凹部１３においては、複数の傾斜面１３ａのうちの少なくとも一部は前後方向に傾斜しており、複数の傾斜面１３ａのうちの少なくとも一部は左右方向に傾斜している。なお、本実施の形態では、全ての傾斜面１３ａが、前後方向に傾斜し、且つ左右方向にも傾斜している。ヒートポンプ給湯室外機１は、左右方向に傾いて据え付けられる場合がある。ヒートポンプ給湯室外機１は、前後方向に傾いて据え付けられる場合もある。また、ヒートポンプ給湯室外機１は、左右方向及び前後方向の双方に傾いて据え付けられる場合もある。凹部１３が複数の傾斜面１３ａを備えている場合、傾斜面１３ａの傾き方向を上述のように規定することにより、ヒートポンプ給湯室外機１がいずれの方向に傾いて据え付けられたときでも、凹部１３に溜まった水を下部保温材１０の外部へさらに速やかに排出することができる。 Further, in recess 13 having a plurality of inclined surfaces 13a according to the present embodiment, at least a part of the plurality of inclined surfaces 13a is inclined in the front-rear direction, and at least one of the plurality of inclined surfaces 13a is inclined. The part is inclined in the left-right direction. In the present embodiment, all the inclined surfaces 13a are inclined in the front-rear direction and also in the left-right direction. The heat pump hot water supply outdoor unit 1 may be installed to be inclined in the left-right direction. In some cases, the heat pump hot water supply outdoor unit 1 is installed inclined in the front-rear direction. In some cases, the heat pump hot water supply outdoor unit 1 may be installed inclined in both the left-right direction and the front-back direction. When the concave portion 13 has a plurality of inclined surfaces 13a, by defining the inclination direction of the inclined surface 13a as described above, even when the heat pump hot water supply outdoor unit 1 is inclined and installed in any direction, the concave portion 13 Water accumulated in the lower heat insulating material 10 can be discharged more quickly.
　なお、本実施の形態に係る下部保温材１０の内底部１０ａは複数の凸部１２を備えているが、凸部１２の数は任意である。例えば、凸部１２の形状を平面視略額縁状とすることにより、１つの凸部１２の上に水冷媒熱交換器３を置くことができる。ここで、内底部１０ａが複数の凸部１２を備えている場合、図６及び図８に示すように各凸部１２を配置することが好ましい。詳しくは、複数の凸部１２は、水冷媒熱交換器３を平面視した際に該水冷媒熱交換器３の長手方向となる方向に、間隔を空けて並べられているのが好ましい。複数の凸部１２をこのように配置することにより、水冷媒熱交換器３のたわみを抑制できる。すなわち、水冷媒熱交換器３がたわんで凹部１３に溜まった水に浸ることを抑制できる。 In addition, although the inner bottom part 10a of the lower heat insulating material 10 according to the present embodiment includes a plurality of convex parts 12, the number of the convex parts 12 is arbitrary. For example, the water-refrigerant heat exchanger 3 can be placed on one protrusion 12 by making the shape of the protrusion 12 substantially frame-shaped in plan view. Here, when the inner bottom part 10a has a plurality of convex parts 12, it is preferable to arrange each convex part 12 as shown in FIG. 6 and FIG. More specifically, the plurality of protrusions 12 are preferably arranged at intervals in a direction that is the longitudinal direction of the water-refrigerant heat exchanger 3 when the water-refrigerant heat exchanger 3 is viewed in plan. By arranging the plurality of protrusions 12 in this way, the deflection of the water-refrigerant heat exchanger 3 can be suppressed. That is, it is possible to prevent the water-refrigerant heat exchanger 3 from being bent and immersed in the water accumulated in the concave portion 13.
　また、本実施の形態では、縦断面において、凸部１２の角部１２ａは、該凸部１２の外側に凸形状となる円弧形状となっている。凸部１２の角部１２ａをこのような形状とすることにより、水冷媒熱交換器３と凸部１２の上面との接触面積を小さくすることができる。また、凸部１２の角部１２ａをこのような形状とすることにより、水冷媒熱交換器３から凸部１２の上面に流れ落ちた水は、凸部１２の上面に留まり難くなる。このため、凸部１２の角部１２ａをこのような形状とすることにより、水冷媒熱交換器３が水と接触している時間を短縮でき、水冷媒熱交換器３の腐食をさらに抑制できる。 In addition, in the present embodiment, in the vertical cross section, the corner 12 a of the convex portion 12 has an arc shape that is convex outside the convex portion 12. By forming the corners 12a of the protrusions 12 in such a shape, the contact area between the water-refrigerant heat exchanger 3 and the upper surface of the protrusions 12 can be reduced. In addition, by making the corners 12 a of the convex portion 12 have such a shape, the water that has flowed down from the water-refrigerant heat exchanger 3 to the upper surface of the convex portion 12 is less likely to remain on the upper surface of the convex portion 12. For this reason, by making the corner 12a of the convex part 12 into such a shape, the time during which the water-refrigerant heat exchanger 3 is in contact with water can be shortened, and the corrosion of the water-refrigerant heat exchanger 3 can be further suppressed. .
　以上、本実施の形態に係るヒートポンプ給湯室外機１は、箱状の保温材と、前記保温材に収納され、冷媒で水を加熱する水冷媒熱交換器３と、を備えている。前記保温材の下部保温材１０の内底部１０ａは、凸部１２及び凹部１３を有する凹凸形状となっている。凹部１３には、内底部１０ａを貫通する排水穴１１が形成されている。そして、水冷媒熱交換器３は、内底部１０ａの凸部１２の上に置かれている。 As described above, the heat pump hot water supply outdoor unit 1 according to the present embodiment includes a box-shaped heat insulator and a water-refrigerant heat exchanger 3 housed in the heat insulator and heating water with a refrigerant. The inner bottom part 10 a of the lower heat insulating material 10 of the heat insulating material has an uneven shape having a convex part 12 and a concave part 13. In the recess 13, a drain hole 11 penetrating the inner bottom 10 a is formed. And the water-refrigerant heat exchanger 3 is placed on the convex portion 12 of the inner bottom portion 10a.
　本実施の形態に係るヒートポンプ給湯室外機１においては、水冷媒熱交換器３の表面に結露が発生し、水冷媒熱交換器３の表面の水が下部保温材１０の内底部１０ａに流れ落ちた際、該水は内底部１０ａの凹部１３に溜まる。そして、該凹部１３に溜まった水は、該凹部１３に形成された排水穴１１から下部保温材１０の外部へ排出される。水冷媒熱交換器３は、凸部１２によって、凹部１３に対して嵩上げされている。このため、本実施の形態に係るヒートポンプ給湯室外機１は、箱状の保温材に収納された水冷媒熱交換器３に結露が発生した場合でも、従来よりも水冷媒熱交換器３が水に浸ることを抑制できる。すなわち、本実施の形態に係るヒートポンプ給湯室外機１は、水冷媒熱交換器３の腐食を従来よりも抑制することができる。 In the heat pump hot water supply outdoor unit 1 according to the present embodiment, dew condensation occurs on the surface of the water-refrigerant heat exchanger 3, and water on the surface of the water-refrigerant heat exchanger 3 flows down to the inner bottom part 10 a of the lower heat insulating material 10. At this time, the water accumulates in the concave portion 13 of the inner bottom portion 10a. Then, the water accumulated in the concave portion 13 is discharged to the outside of the lower heat insulating material 10 from a drain hole 11 formed in the concave portion 13. The water-refrigerant heat exchanger 3 is raised with respect to the concave portion 13 by the convex portion 12. For this reason, the heat pump hot-water supply outdoor unit 1 according to the present embodiment has a configuration in which the water-refrigerant heat exchanger 3 has more water than the conventional case even when dew condensation occurs in the water-refrigerant heat exchanger 3 housed in the box-shaped heat insulating material. Can be suppressed. That is, the heat pump hot water supply outdoor unit 1 according to the present embodiment can suppress corrosion of the water-refrigerant heat exchanger 3 more than before.
　１　ヒートポンプ給湯室外機、２　圧縮機、３　水冷媒熱交換器、３ａ　水配管、３ｂ　冷媒配管、４ａ　第一膨張弁、４ｂ　第二膨張弁、５　蒸発器、６　内部熱交換器、７　送風機、８　ケース、９　上部保温材、１０　下部保温材、１０ａ　内底部、１１　排水穴、１２　凸部、１２ａ　角部、１３　凹部、１３ａ　傾斜面、１３ｂ　頂点、１３ｃ　下端部、１４　機械室、１５　送風機室、１６　仕切板、１７　電気部品収納箱、１８　底板、１９　フロントパネル、２０　サイドパネル、２１　トップパネル、２２　サービスパネル、２３　接続部カバー、２４　グリル、２５　脚部、９０　ヒートポンプ給湯システム、９１　タンクユニット、９２　貯湯タンク、９３　ポンプ、９４　流路切替弁、９５　バイパス配管、９６　外部配管、９７　外部配管、９８　タンク上部管。 1 heat pump hot water supply outdoor unit, 2 compressor, 3 water refrigerant heat exchanger, 3a water pipe, 3b refrigerant pipe, 4a first expansion valve, 4b second expansion valve, 5 evaporator, 6 internal heat exchanger, 7 air blower, 8 case, 9 upper heat insulator, 10 lower insulator, 10a inner bottom, 11 drain hole, 12 convex, 12a angular, 13 concave, 13a inclined surface, 13b vertex, 13c lower end, 14 machine room, 15 blower room , 16 partition, 17 electrical parts storage box, 18 bottom plate, 19 front panel, 20 side panel, 21 top panel, 22 service panel, 23 connection part cover, 24 grill, 25 leg, 90 heat pump hot water supply system, 91 tank unit , 92 hot water storage tank, 93 pump, 94 flow switching valve, 95 bypass pipe, 96 External piping, 97 external pipe, 98 tank upper tube.

Claims (7)

  1. 　箱状の保温材と、
    　前記保温材に収納され、冷媒で水を加熱する水冷媒熱交換器と、
    　を備え、
    　前記保温材の内底部は、凸部及び凹部を有する凹凸形状となっており、
    　前記凹部には、前記内底部を貫通する排水穴が形成され、
    　前記水冷媒熱交換器は、前記凸部の上に置かれているヒートポンプ給湯室外機。     Box-shaped insulation,
    A water-refrigerant heat exchanger stored in the heat insulating material and heating water with a refrigerant,
    With
    The inner bottom portion of the heat insulating material has an uneven shape having a convex portion and a concave portion,
    A drain hole is formed in the recess, penetrating the inner bottom,
    The water-refrigerant heat exchanger is a heat pump hot water supply outdoor unit that is placed on the protrusion.
  2. 　前記凹部は、前記排水穴に向かって下降するように傾斜する傾斜面を備えている請求項１に記載のヒートポンプ給湯室外機。 The heat pump hot water supply outdoor unit according to claim 1, wherein the concave portion includes an inclined surface inclined so as to descend toward the drain hole.
  3. 　前記保温材を平面視した際、前記凸部の一部は、前記傾斜面の頂点に位置している請求項２に記載のヒートポンプ給湯室外機。 The heat pump hot water supply outdoor unit according to claim 2, wherein a part of the convex portion is located at a vertex of the inclined surface when the heat insulating material is viewed in a plan view.
  4. 　前記排水穴は、前記傾斜面の下端部に形成されている請求項２又は請求項３に記載のヒートポンプ給湯室外機。 4. The heat pump hot water supply outdoor unit according to claim 2, wherein the drain hole is formed at a lower end portion of the inclined surface. 5.
  5. 　前記凹部は、複数の前記傾斜面を備え、
    　複数の前記傾斜面のうちの少なくとも一部は、前後方向に傾斜しており、
    　複数の前記傾斜面のうちの少なくとも一部は、左右方向に傾斜している請求項２～請求項４のいずれか一項に記載のヒートポンプ給湯室外機。     The recess includes a plurality of the inclined surfaces,
    At least a part of the plurality of inclined surfaces is inclined in the front-rear direction,
    The heat pump hot water supply outdoor unit according to any one of claims 2 to 4, wherein at least a part of the plurality of inclined surfaces is inclined in the left-right direction.
  6. 　前記内底部は、複数の前記凸部を備え、
    　複数の前記凸部は、前記水冷媒熱交換器を平面視した際に該水冷媒熱交換器の長手方向となる方向に、間隔を空けて並べられている請求項１～請求項５のいずれか一項に記載のヒートポンプ給湯室外機。     The inner bottom portion includes a plurality of the protrusions,
    6. The water refrigerant heat exchanger according to claim 1, wherein the plurality of protrusions are spaced from each other in a direction that is a longitudinal direction of the water refrigerant heat exchanger when the water refrigerant heat exchanger is viewed in a plan view. The heat pump hot water supply outdoor unit according to claim 1.
  7. 　縦断面において、前記凸部の角部は、該凸部の外側に凸形状となる円弧形状となっている請求項１～請求項６のいずれか一項に記載のヒートポンプ給湯室外機。 The heat pump hot water supply outdoor unit according to any one of claims 1 to 6, wherein in the vertical cross section, the corners of the convex portion have an arc shape that is convex outside the convex portion.
PCT/JP2018/027274 2018-07-20 2018-07-20 Heat pump water heater outdoor unit WO2020017021A1 (en)

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Application Number Priority Date Filing Date Title
PCT/JP2018/027274 WO2020017021A1 (en) 2018-07-20 2018-07-20 Heat pump water heater outdoor unit
NZ770289A NZ770289A (en) 2018-07-20 2018-07-20 Heat-pump hot-water supply outdoor unit
EP18926577.0A EP3825622B1 (en) 2018-07-20 2018-07-20 Heat-pump hot-water supply outdoor unit
JP2020530839A JP6921326B2 (en) 2018-07-20 2018-07-20 Heat pump hot water supply outdoor unit

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WO2020017021A1 true WO2020017021A1 (en) 2020-01-23

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Cited By (1)

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EP3825622A1 (en) 2021-05-26
EP3825622B1 (en) 2024-11-06

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