WO2025009355A1 - 給湯機 - Google Patents

給湯機 Download PDF

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Publication number
WO2025009355A1
WO2025009355A1 PCT/JP2024/021563 JP2024021563W WO2025009355A1 WO 2025009355 A1 WO2025009355 A1 WO 2025009355A1 JP 2024021563 W JP2024021563 W JP 2024021563W WO 2025009355 A1 WO2025009355 A1 WO 2025009355A1
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WO
WIPO (PCT)
Prior art keywords
top surface
hot water
water heater
surface portion
heat exchanger
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/JP2024/021563
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
晃平 舩津
翔 後藤
伸浩 立花
将吾 岩原
健太郎 村瀬
慶郎 青▲柳▼
卓矢 池田
茂 飯島
僚 川阪
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
Priority to JP2025531460A priority Critical patent/JPWO2025009355A1/ja
Priority to DE112024002868.3T priority patent/DE112024002868T5/de
Publication of WO2025009355A1 publication Critical patent/WO2025009355A1/ja
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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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
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/18—Water-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
    • 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
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • 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
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/14—Arrangements for connecting different sections, e.g. in water 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
    • F24H9/18—Arrangement or mounting of grates or heating means
    • F24H9/1809—Arrangement or mounting of grates or heating means for water 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
    • F24H9/20—Arrangement or mounting of control or safety devices

Definitions

  • This disclosure relates to a water heater.
  • Some water heaters have a heating device that heats the water located above the hot water storage tank to reduce installation space.
  • Patent Document 1 discloses a water heater in which a heat pump unit that houses a heat pump device is disposed above a tank unit that houses a hot water storage tank, and the heat pump unit is fixed to the tank unit.
  • This disclosure has been made to solve the above problems, and aims to provide a water heater that can place a heating device on top of a hot water storage tank with a small number of parts.
  • the water heater comprises a heating device, a hot water storage tank, and an insulating member.
  • the heating device heats hot water.
  • the hot water storage tank is disposed below the heating device and stores hot water heated by the heating device.
  • the insulating member has a top surface disposed between the heating device and the hot water storage tank, and covers the hot water storage tank.
  • the top surface has at least one of a recess that fits with and supports at least one component that constitutes the heating device, and a protrusion that abuts against at least one component that constitutes the heating device and determines the position of the component.
  • the top surface of the insulating member has at least one of a recess that fits with and supports at least one component that constitutes the heating device, and a protrusion that abuts against at least one component that constitutes the heating device and determines the position of the component. Therefore, there is no need to provide a member other than the top surface to support the components that constitute the heating device. As a result, the heating device can be placed on top of the hot water storage tank with a small number of parts.
  • FIG. 1 is a perspective view of a water heater according to a first embodiment of the present disclosure, viewed obliquely from above and in front;
  • FIG. 1 is a perspective view of a water heater according to a first embodiment of the present disclosure, viewed obliquely from below at a rear thereof;
  • FIG. 1 is a front view showing an internal structure of a housing of a water heater according to a first embodiment of the present disclosure.
  • FIG. 1 is a diagram showing an overall configuration of a water heater according to a first embodiment of the present disclosure. 1 is a cross-sectional view of a hot water tank and a heat insulating member included in a water heater according to a first embodiment of the present disclosure;
  • FIG. 1 is a perspective view of a water heater according to a first embodiment of the present disclosure, viewed obliquely from above and in front;
  • FIG. 1 is a perspective view of a water heater according to a first embodiment of the present disclosure, viewed obliquely from
  • FIG. 1 is a perspective view of a top surface of a heat insulating member included in a water heater according to a first embodiment of the present disclosure, viewed obliquely from above;
  • FIG. 1 is a perspective view of a heating unit included in a water heater according to a first embodiment of the present disclosure, viewed obliquely from below;
  • FIG. 1 is a perspective view of a top surface of a heat insulating member into which a heating unit included in a water heater according to a first embodiment of the present disclosure is fitted, viewed obliquely from above;
  • FIG. 13 is a perspective view of an upper portion of a hot water storage unit included in a hot water heater according to a second embodiment of the present disclosure, and a frame structure provided in the upper portion;
  • FIG. 1 is a perspective view of a top surface of a heat insulating member included in a water heater according to a first embodiment of the present disclosure, viewed obliquely from above;
  • FIG. 1 is
  • FIG. 13 is a perspective view of a heat exchanger of a heating unit supported by a frame structure included in a water heater according to a second embodiment of the present disclosure.
  • FIG. 13 is a perspective view of a top surface of a heat insulating member included in a water heater according to a third embodiment of the present disclosure.
  • FIG. 13 is an enlarged top view of a portion of a top surface of a heat insulating member included in a water heater according to a third embodiment of the present disclosure.
  • FIG. 13 is a perspective view showing an example of a shaped steel member forming a lower frame portion of a frame structure included in a water heater according to a fourth embodiment of the present disclosure.
  • FIG. 13 is a perspective view of a top surface of a heat insulating member included in a water heater according to a fourth embodiment of the present disclosure.
  • 15 is a cross-sectional view taken along the line XV-XV in FIG.
  • FIG. 13 is a perspective view of a top surface of a heat insulating member included in a water heater according to a fifth embodiment of the present disclosure.
  • FIG. 13 is a perspective view of a top surface of a heat insulating member into which a heating unit included in a water heater according to a fifth embodiment of the present disclosure is fitted.
  • FIG. 13 is a perspective view of a top surface of a heat insulating member included in a water heater according to a sixth embodiment of the present disclosure.
  • FIG. 13 is an enlarged front view showing an internal structure of a housing of a water heater according to a sixth embodiment of the present disclosure.
  • the water heater according to the first embodiment is a water heater in which a heating unit equipped with a heating device is disposed on a hot water storage unit equipped with a hot water storage tank and a heat insulating member.
  • a heating unit equipped with a heating device is disposed on a hot water storage unit equipped with a hot water storage tank and a heat insulating member.
  • components provided in the heating device of the heating unit are placed directly on the heat insulating member of the hot water storage unit.
  • FIG. 1 is a front perspective view of the water heater 1A according to the first embodiment, viewed from diagonally above.
  • FIG. 2 is a rear perspective view of the water heater 1A, viewed from diagonally below.
  • FIG. 3 is a front view showing the internal structure of a housing 10 provided in the water heater 1A.
  • FIG. 4 is a diagram showing the overall configuration of the water heater 1A. Note that FIG. 3 shows the housing 10 with the front panel 11, right side panel 12, and left side panel 13 shown in FIGS. 1 and 2 removed.
  • the water heater 1A has a rectangular parallelepiped housing 10. As shown in Fig. 3, the water heater 1A has a heating unit 20 housed in an upper region of the internal space of the housing 10, and a hot water storage unit 50 housed in a lower region of the internal space of the housing 10.
  • the heating unit 20 is a unit having a circuit for heating hot water to be supplied to a heating device (not shown), such as a radiator or a floor heating pipe, and hot water stored in the hot water storage unit 50.
  • a heating device such as a radiator or a floor heating pipe
  • the heating unit 20 includes a heating circuit 30 that circulates hot water between the heating device (not shown), and a hot water supply circuit 40 that circulates hot water between the hot water storage unit 50.
  • the heating circuit 30 has an expansion tank 31, a multifunction device 32, a pump 33, a heat exchanger 34, a booster heater 35, and a three-way valve 36 to send heated water to the heating device.
  • a pump 33 sends hot water in the heating circuit 30.
  • the expansion tank 31 is a tank that absorbs the expansion of hot water in the heating circuit 30. When the temperature of the hot water in the heating circuit 30 becomes high and thermally expands, the expansion tank 31 temporarily stores the hot water and suppresses the increase in pressure in the heating circuit 30.
  • the expansion tank 31 is connected to a heating device (not shown) and suppresses the increase in pressure of the hot water supplied from the heating device.
  • the expansion tank 31 discharges the hot water supplied from the heating device to the multifunction device 32.
  • the multifunction device 32 is a device with multiple functions.
  • the multifunction device 32 includes a filter that removes scale, such as rust particles, contained in the hot water, a relief valve that releases the hot water to the outside when the pressure of the hot water in the heating circuit 30 becomes higher than the allowable pressure, and an air vent valve that exhausts air that accumulates in the heating circuit 30 to prevent a drop in pressure in the pump 33.
  • the multifunction device 32 passes the hot water supplied from the expansion tank 31 through these components and then sends it to the pump 33.
  • the pump 33 is a device that applies pressure to the hot water in the heating circuit 30 and circulates the hot water between the heating circuit 30 and the heating device.
  • the pump 33 applies pressure to the hot water that has passed through the multifunction device 32 and sends the hot water to the heat exchanger 34.
  • the heat exchanger 34 is a device that exchanges heat between the refrigerant heated by the outdoor unit 60 and the hot water flowing through the heating circuit 30.
  • the heat exchanger 34 heats the hot water sent from the pump 33 through heat exchange and discharges it to the booster heater 35.
  • the booster heater 35 is an auxiliary device that heats hot water when the heating capacity of the outdoor unit 60 is insufficient. When the booster heater 35 heats hot water, it discharges the hot water to the three-way valve 36.
  • the three-way valve 36 is a device that switches the flow of hot and cold water in the heating circuit 30.
  • the three-way valve 36 switches whether the hot and cold water supplied from the booster heater 35 flows to a heating device (not shown) or to a heat exchanger 41 (described later) in the hot water supply circuit 40.
  • the heating circuit 30 these devices are connected in this order via piping: expansion tank 31, multifunction device 32, pump 33, heat exchanger 34, booster heater 35, and three-way valve 36.
  • the heating circuit 30 receives hot water supplied from the heating device via piping connected to the expansion tank 31, and heats the hot water using the heat exchanger 34 and booster heater 35.
  • the heating circuit 30 discharges the heated hot water to the heating device. In this way, the heating circuit 30 causes the heating device to perform heating using the heated hot water.
  • the heating circuit 30 discharges heated water to the heat exchanger 41 of the hot water supply circuit 40.
  • the configuration of the hot water supply circuit 40 will be described.
  • the hot water supply circuit 40 has a heat exchanger 41, a scale trap 42, and a pump 43.
  • the heat exchanger 41 is a device that exchanges heat between the hot water heated by the heating circuit 30 described above and the hot water in the hot water storage tank 51 of the hot water storage unit 50, which will be described later.
  • the heat exchanger 41 is connected to a pipe 44 that extends into the inside of the hot water storage tank 51.
  • the heat exchanger 41 exchanges heat between the hot water in the hot water storage tank 51 supplied from the pipe and the heated hot water supplied from the heating circuit 30 by switching the three-way valve 36 described above. In this way, the heat exchanger 41 heats the hot water from the hot water storage tank 51. After heating the hot water, the heat exchanger 41 discharges the hot water into the scale trap 42.
  • the scale trap 42 is a device that captures scale particles contained in the hot water.
  • the scale trap 42 is equipped with an adsorbent material, and captures scale particles contained in the hot water by passing the heated hot water discharged from the heat exchanger 41 through the adsorbent material.
  • the pump 43 has an intake port and an exhaust port, not shown.
  • the scale trap 42 is connected to the intake port of the pump 43 via piping. This allows the pump 43 to suck in hot water from the scale trap 42. As a result, the pump 43 sucks up hot water from the hot water storage tank 51 and flows it through the heat exchanger 41 and the scale trap 42.
  • the discharge port of the pump 43 is connected to a pipe 45 that extends into the hot water storage tank 51. This allows the pump 43 to send hot water drawn from the scale trap 42 to the hot water storage tank 51. As a result, the hot water heated by the heat exchanger 41 is sent through the scale trap 42 and the pump 43 to the hot water storage tank 51, i.e., the hot water storage unit 50.
  • the hot water storage unit 50 includes a hot water storage tank 51 formed in the shape of a cylinder with convex ends.
  • a water supply pipe 52 equipped with a water supply valve is connected to the hot water storage tank 51, and tap water, i.e., low-temperature water, is supplied from the water supply pipe 52.
  • the pipes 44, 45 of the hot water supply circuit 40 described above are connected to the hot water storage tank 51, and the water or hot water in the hot water storage tank 51, i.e., hot water, is converted to hot water at a higher temperature by circulating through the hot water supply circuit 40 via the pipes 44, 45.
  • a hot water supply pipe 53 equipped with a hot water supply valve is connected to the hot water storage tank 51.
  • the hot water supply pipe 53 supplies the hot water in the hot water storage tank 51 to external equipment.
  • the hot water heated by the hot water supply circuit 40 is stored in the hot water storage tank 51.
  • the hot water storage unit 50 is equipped with a heat insulating member that covers the outer surface of the hot water storage tank 51. Next, the configuration of the heat insulating member will be described in detail with reference to Figure 5.
  • FIG. 5 is a cross-sectional view of the hot water storage tank 51 and the heat insulating member 54 provided in the water heater 1A. Note that hatching is omitted in FIG. 5.
  • the heat insulating member 54 is formed by combining heat insulating materials on the top surface 541A, the right side surface 542, the left side surface 543, and the bottom surface 544.
  • Top surface portion 541A is formed in the shape of an upside-down bowl. The shape of the upper surface of top surface portion 541A will be described later, but the lower surface of top surface portion 541A is concave in a parabolic shape. As a result, top surface portion 541A fits into the upper surface of hot water storage tank 51. Top surface portion 541A also covers the upper surface of hot water storage tank 51 to suppress heat radiation from the upper surface of hot water storage tank 51. Also, the outer peripheral end surface of top surface portion 541A, i.e., the lower end surface, has a step as a result of the outer portion protruding downward from the inner portion, as shown in FIG. 5.
  • the upper end surfaces of right side surface portion 542 and left side surface portion 543 have a step in which the inner portion protrudes upward from the outer portion, opposite to the lower end surface of top surface portion 541A.
  • the lower end surface of top surface portion 541A fits into the upper end surfaces of right side surface portion 542 and left side surface portion 543.
  • the top surface 541A is fixed to the right side surface 542 and the left side surface 543.
  • the step on the bottom end surface of the top surface 541A and the steps between the right side surface 542 and the left side surface 543 may be uneven in the opposite direction to that described above.
  • the right side surface 542 and the left side surface 543 are integral, they may be uneven in the opposite direction to that described above.
  • the right side portion 542 and the left side portion 543 are formed in a semi-cylindrical shape.
  • the right side portion 542 and the left side portion 543 fit into the right side wall and the left side wall of the hot water storage tank 51.
  • the right side portion 542 and the left side portion 543 cover the outer peripheral surface of the hot water storage tank 51.
  • heat radiation from the outer peripheral surface of the hot water storage tank 51 is suppressed.
  • the hot water tank 51 has a parabolic underside that protrudes downward, and a cylindrical base 511 is welded to the underside.
  • the bottom surface 544 of the insulating member 54 is formed in the shape of a bowl with a cylindrical cut-out in the center so that it can fit between the underside of the hot water tank 51 and the base 511.
  • the bottom surface portion 544 has this shape and covers the bottom surface of the hot water storage tank 51. As a result, the bottom surface portion 544 suppresses heat dissipation from the bottom surface of the hot water storage tank 51.
  • the insulation materials on the top surface 541A, right side surface 542, left side surface 543, and bottom surface 544 are made of foamed plastic, such as expanded polystyrene. As a result, these insulation materials have high heat retention and a certain degree of rigidity. Furthermore, these insulation materials are strong enough not to undergo plastic deformation even when a certain degree of compressive force is applied.
  • the heating unit 20 is placed on the hot water storage unit 50 as shown in FIG. 3.
  • a top plate made of metal, resin, etc. on the hot water storage unit 50 and to arrange each component of the heating unit 20 on the plate.
  • a bottom plate under the heating unit 20 to support each component of the heating unit 20.
  • top plate and bottom plate would increase the number of parts in the water heater 1A, which would increase manufacturing costs. Also, the weight of the water heater 1A would increase.
  • the top surface 541A of the insulating member 54 has a certain degree of strength, the top surface 541A is provided with uneven portions into which the components of the heating unit 20 fit, and the components fit into the uneven portions. In addition, the components of the heating unit 20 are directly supported by the top surface 541A.
  • an uneven portion refers to a portion where, when there is a convex portion, other portions become concave portions when viewed from the convex portion.
  • an uneven portion refers to a portion where, when there is a concave portion, other portions become convex portions when viewed from the concave portion.
  • the surface of the flat portion or curved portion other than the convex portion is a concave portion.
  • the surface of the flat portion or curved portion other than the concave portion is a convex portion.
  • Figure 6 is an oblique view of the top surface 541A of the insulating member 54 provided in the water heater 1A, viewed diagonally from above.
  • Figure 7 is an oblique view of the heating unit 20 provided in the water heater 1A, viewed diagonally from below.
  • Figure 8 is an oblique view of the top surface 541A of the insulating member 54 into which the heating unit 20 provided in the water heater 1A is fitted, viewed diagonally from above. Note that, for ease of understanding, Figures 7 and 8 only show the parts of the heating unit 20 that are placed on the top surface 541A of the insulating member 54.
  • the upper surface of the top surface 541A of the insulating member 54 is formed with uneven portions into which the components of the heating unit 20 fit.
  • the depth of the recesses among these uneven portions is shallower than the height of each component of the heating unit 20, and as a result, each component of the heating unit 20 protrudes from the recesses.
  • Such uneven portions are formed on the upper surface of the top surface 541A.
  • the expansion tank support portion 310, the multifunction device support portion 320, the pump support portion 330, the heat exchanger support portions 340, 410, the scale trap support portion 420, and the piping support portion 440 which are uneven surfaces, are formed on the upper surface of the top surface 541A.
  • the expansion tank 31 has an outer shape in the form of a thick plate with rounded corners.
  • the surface of the thick plate of the expansion tank 31 faces left and right, and the longitudinal direction of the surface faces up and down.
  • the bottom surface 311 of the expansion tank 31 is U-shaped with bent front and rear ends.
  • the bottom portion of the expansion tank 31 also has a shape with a protruding wall 312 that extends linearly in the front-to-rear direction.
  • the expansion tank support portion 310 has a U-shaped surface 313 bent in the front-rear direction into a U-shape to support the underside portion of the expansion tank 31 having the above-mentioned shape, and a groove 314 extending in the front-rear direction on the U-shaped surface 313.
  • the underside 311 of the expansion tank 31 can be fitted into the U-shaped surface 313.
  • the protruding wall 312 of the expansion tank 31 can be fitted into the groove 314.
  • the expansion tank 31 is fitted into the expansion tank support part 310.
  • the expansion tank support part 310 determines the position of the expansion tank 31.
  • the expansion tank support part 310 determines the position of the expansion tank 31 and also supports the expansion tank 31.
  • the multifunction device 32 has a pipe 321 at the bottom that is bent forward in an L-shape from the vertical direction.
  • the multifunction device support section 320 has a truncated pyramid section 322 that protrudes from the upper surface of the top surface section 541A of the heat insulating member 54, and a groove 323 that is U-shaped in cross section and is formed in the truncated pyramid section 322 and extends in the front-to-rear direction.
  • the L-shaped bent pipe 321 described above can be fitted into the groove 323.
  • the piping 321 of the multifunction device 32 is fitted into the multifunction device support part 320.
  • the multifunction device support part 320 determines the position of the multifunction device 32.
  • the multifunction device support part 320 also supports the multifunction device 32 via the piping 321.
  • the pump 33 has an outer shape in which a small diameter portion 331 and a large diameter portion 332 are connected in the front-rear direction.
  • a protrusion 333 extending in the front-rear direction is formed on the small diameter portion 331 at the front.
  • a cylindrical surface recess 334 and a cylindrical surface recess 335 having a larger diameter than the cylindrical surface recess 334 are arranged in the front-rear direction.
  • a groove 336 extending in the front-rear direction is formed in the cylindrical surface recess 334.
  • the small diameter portion 331 and the large diameter portion 332 can be fitted into the cylindrical surface recesses 334 and 335.
  • the protrusion 333 can be inserted into the groove 336.
  • the heating unit 20 is attached to the top surface 541A of the insulating member 54, the underside of the pump 33 is placed on the pump support portion 330.
  • the small diameter portion 331 and the large diameter portion 332 are fitted into the cylindrical surface recesses 334 and 335.
  • the cylindrical surface recesses 334 and 335 determine the position of the pump 33 and support the pump 33.
  • the protrusion 333 is inserted into the groove 336.
  • the groove 336 prevents the protrusion 333 from interfering with the position of the pump 33 and preventing it from being unsupported by the cylindrical surface recesses 334 and 335.
  • the heat exchanger 34 has an elongated rectangular shape with rounded corners. Each face of the rectangular shape of the heat exchanger 34 faces up/down, left/right, and front/back.
  • the heat exchanger support portion 340 has a flat surface 341 parallel to the horizontal plane, a curved wall 342 curved in an arc in the front-to-rear direction, and a vertical wall 343 with its vertical wall surface facing to the right.
  • the front corner of the lower surface of the heat exchanger 34 can be fitted into the curved wall 342 when the lower surface of the heat exchanger 34 abuts against the flat surface 341.
  • the left side surface of the heat exchanger 34 can be fitted into the vertical wall 343 when the front corner of the lower surface of the heat exchanger 34 is fitted into the curved wall 342.
  • the arc-shaped recess formed in the vertical wall 343 is a recess that prevents interference with piping.
  • the heat exchanger support portion 340 determines the position of the heat exchanger 34. It also supports the heat exchanger 34.
  • the heat exchanger 41 has a rectangular shape with rounded corners and is smaller than the heat exchanger 34.
  • the heat exchanger 41 also has each face of its rectangular shape facing up/down, left/right, and front/back.
  • the heat exchanger support portion 410 has a flat surface 411 parallel to the horizontal plane, a curved wall 412 that curves in an arc in the left-right direction, and a vertical wall 413 whose vertical wall surface faces rearward.
  • the right corner portion of the lower surface of the heat exchanger 41 can be fitted into the curved wall 412 when the lower surface of the heat exchanger 41 abuts against the flat surface 411.
  • the front side surface of the heat exchanger 41 can be fitted into the vertical wall 413 when the right corner portion of the lower surface of the heat exchanger 41 is fitted into the curved wall 412.
  • the underside of the heat exchanger 41 abuts against the heat exchanger support part 410.
  • the underside and front side of the heat exchanger 41 abut against the flat surface 411 and the vertical wall 413.
  • the right corner of the underside of the heat exchanger 41 fits into the curved wall 412. In this way, the heat exchanger support part 410 determines the position of the heat exchanger 41. It also supports the heat exchanger 41.
  • the scale trap 42 has a pipe 421 at the bottom that is bent in an L-shape from the vertical to the rear.
  • the scale trap support portion 420 has a protrusion 422 that protrudes in a rectangular shape from the upper surface of the top surface portion 541A of the heat insulating member 54 in a top view, and a groove 423 that is formed in the protrusion 422 and has a U-shaped cross section that extends in the front-to-rear direction.
  • the above-mentioned L-shaped bent pipe 421 can be fitted into the groove 423.
  • the piping 421 of the scale trap 42 is fitted into the scale trap support part 420.
  • the scale trap support part 420 determines the position of the scale trap 42.
  • the scale trap support part 420 also supports the scale trap 42 via the piping 421.
  • the heating unit 20 has a pipe 44 that extends downward from the heat exchanger 41, and a pipe 45 that bends in a crank shape and extends downward.
  • the pipes 44 and 45 are pipes that extend into the inside of the hot water storage tank 51 when the water heater 1A is assembled, and serve as the hot water intake and exhaust ports.
  • the pipe support part 440 has U-shaped recesses 441 and 442 recessed forward from the rear end surface of the top surface part 541A of the heat insulating member 54, as shown in FIG. 6.
  • the pipes 44 and 45 can be fitted into the recesses 441 and 442 from the rear.
  • the pipe 44 is fitted into the recess 441.
  • the pipe 44 passes through the recess 441 and extends in the vertical direction.
  • the pipe 45 is fitted into the recess 442, and as a result, the pipe 45 also passes through the recess 442 and extends in the vertical direction.
  • the recesses 441 and 442 hold the pipes 44 and 45.
  • an uneven portion is formed on the upper surface of the top surface 541A of the insulating member 54, which is constituted by the expansion tank support portion 310, the multifunction device support portion 320, the pump support portion 330, the heat exchanger support portions 340, 410, the scale trap support portion 420, and the piping support portion 440.
  • Each part of the heating unit 20 fits into the uneven portion.
  • the position of each part of the heating unit 20 is determined, and each part of the heating unit 20 is supported or held.
  • the heating unit 20 can be placed on the hot water storage unit 50 without increasing the number of parts.
  • the heating unit 20 described above is an example of a heating device as defined in this disclosure.
  • the expansion tank 31, multifunction device 32, pump 33, heat exchangers 34, 41, scale trap 42, and pipes 44, 45 included in the heating unit 20 are an example of at least one component constituting a heating device as defined in this disclosure.
  • the expansion tank support 310, the multifunction device support 320, the pump support 330, the heat exchanger support 340, 410, the scale trap support 420, and the piping support 440 are examples of at least one of a recess that fits with at least one component constituting the heating device and supports the component, and a protrusion that abuts against at least one component constituting the heating device and determines the position of the component, as defined in this disclosure.
  • the U-shaped surface 313, the groove 314, the groove 323, the cylindrical surface recesses 334, 335, the flat surface 411, the curved wall 412, the groove 423, the recesses 441, 442 are examples of a recess that fits with at least one component constituting the heating device and supports the component.
  • the vertical wall 343, the curved wall 412, and the vertical wall 413 are examples of at least one of a protrusion that abuts against at least one component constituting the heating device and determines the position of the component.
  • Flat surfaces 341, 411 are an example of a bottom portion that supports the lower surface of a part as defined in this disclosure.
  • Curved walls 342, 412 and vertical walls 343, 413 are an example of an inner wall portion that supports the side surface of a part as defined in this disclosure.
  • Cylindrical surface recesses 334, 335 are an example of a recess into which a cylindrical outer portion of a pump as defined in this disclosure fits.
  • the insulating member 54 is disposed between the heating unit 20 and the hot water storage tank 51, and has a top surface 541A on which the components constituting the heating unit 20 fit and on which uneven portions are formed to support the components. Therefore, the components constituting the heating unit 20 can be supported without providing any other member other than the insulating member 54 to support the components constituting the heating unit 20. As a result, in the water heater 1A, the heating unit 20 can be disposed on the hot water storage tank 51 with a small number of components.
  • the components that make up the heating unit 20 fit into the unevenness formed in the top surface 541A, so the components that make up the heating unit 20 can be positioned accurately.
  • the water heater 1A can be manufactured with high precision.
  • the top surface 541A having the above-mentioned unevenness may be produced by (1) filling a mold having a cavity with uneven shapes with pre-expanded expanded polystyrene beads, for example, expanded polystyrene beads expanded 30 to 80 times, and (2) applying steam, for example steam at 110 to 120°C, to the expanded polystyrene beads filled in the mold.
  • pre-expanded expanded polystyrene beads for example, expanded polystyrene beads expanded 30 to 80 times
  • steam for example steam at 110 to 120°C
  • the uneven portions formed by the expansion tank support portion 310, multifunction device support portion 320, pump support portion 330, heat exchanger support portion 340, 410, scale trap support portion 420, and piping support portion 440 described above may be uneven in the shapes described above, or may be uneven in a shape that corresponds to the outer shape of the parts to be fitted.
  • a protrusion may be provided on the U-shaped surface 313 of the expansion tank support portion 310, and the protrusion may support the right end or lower end of the lower surface 311 of the expansion tank 31.
  • the vertical walls 343, 413 of the heat exchanger support portions 340, 410 may be inclined with respect to the vertical direction according to the outer shape of the heat exchangers 34, 41.
  • expansion tank support 310, multifunction device support 320, pump support 330, heat exchanger support 340, 410 and scale trap support 420 of the expansion tank 31, multifunction device 32, pump 33, heat exchanger 34, 41 and scale trap 42 may be uneven in shape with surfaces that can abut against the +X, -X, +Y and -Y sides of the lower part of each of these components, and the bottom surface which is the -Z surface.
  • the uneven portion of the top surface 541A of the heat insulating member 54 supports the components constituting the heating unit 20 from below.
  • the water heater 1A is not limited to this.
  • the water heater 1A in addition to the uneven portion of the top surface 541A, there may be something that supports the components constituting the heating unit 20 from the left and right or the front and back.
  • the water heater 1B according to the second embodiment has a frame structure that supports the components that make up the heating unit 20 from the side.
  • Figure 9 is a perspective view of the upper part of the hot water storage unit 50 provided in the hot water heater 1B according to embodiment 2 and the frame structure 70 provided on that upper part.
  • Figure 10 is a perspective view of the heat exchangers 34, 41 of the heating unit 20 supported by the frame structure 70. Note that, for ease of understanding, Figure 10 illustrates the heating unit 20 with only the heat exchangers 34, 41 placed on the top surface 541B of the insulating member 54.
  • the frame structure 70 is formed in the shape of a rectangular parallelepiped framework that is installed on the top surface 541B of the insulating member 54.
  • top surface portion 541B is square in top view. Each side of top surface portion 541B faces the left-right and front-back directions, i.e., the X and Y directions.
  • Frame structure 70 has a U-shaped lower frame portion 71 that is arranged along the +X side, -X side, and -Y side of the square in top view, a rectangular upper frame portion 72 that is provided on top of lower frame portion 71, i.e., on the +Z side, support portions 73-76 that connect lower frame portion 71 and upper frame portion 72, and a beam portion 77 provided between support portions 74 and 75.
  • the lower frame section 71 is formed by connecting three elongated steel plates that are L-shaped in cross section, that is, angle irons, also known as angles.
  • the lower frame portion 71 is formed by combining three angle irons in a U-shape, each having the same length as each side of the square shape of the top surface portion 541B of the insulation member 54 when viewed from above.
  • Each angle iron covers the corner portion formed by the +Z face and the +X face, -Y face or -X face of the top surface portion 541B, with the inner corner of the L-shape when viewed in cross section facing that corner portion.
  • Each angle iron is then placed on the top surface portion 541B in this state. This allows the lower frame portion 71 to be supported by the top surface portion 541B.
  • the upper frame portion 72 is formed by combining steel material that is the same length as the +Y and -Y sides of the square shape of the top surface portion 541B of the insulation member 54 when viewed from above, and steel material that is shorter than the +X and -X sides of the square shape of the top surface portion 541B when viewed from above.
  • the steel material refers to the above-mentioned angle iron or channel steel that is U-shaped in cross section.
  • the upper frame portion 72 is formed by combining such steel materials to form a rectangular frame.
  • the pillars 73-76 are made of steel and extend the same length from the lower frame section 71 in the +Z direction.
  • the pillars 73-76 support each corner of the rectangular frame that is the shape of the upper frame section 72.
  • pillars 73 and 76 are formed in an L-shape in cross section, with the inner corners of the L-shape facing the corners formed by the -Y and +X faces, and the -Y and -X faces, of top surface 541B, respectively, and covering these corners. Furthermore, pillars 73 and 76 are supported in this state by lower frame 71. Meanwhile, pillars 74 and 75 are fixed in place while abutting against the +X or -X face of top surface 541B. In this way, pillars 74 and 75 are supported by lower frame 71.
  • a beam portion 77 is provided between the pillars 74 and 75 to support the heat exchangers 34 and 41 of the heating unit 20.
  • Beam portion 77 is formed from the steel material described above. Its length in the extension direction is the same as the distance from support 74 to support 75. Beam portion 77 is fitted between supports 74 and 75 with its extension direction horizontal. Its position in the Z direction is lower than the +Z end of heat exchangers 34, 41 when heat exchangers 34, 41 of heating unit 20 are attached to top surface portion 541B of insulating member 54 shown in FIG. 10. As a result, beam portion 77 crosses the middle part of heat exchangers 34, 41 when viewed in the Y direction.
  • both ends of the beam portion 77 are fixed to the supports 74 and 75, respectively, at the positions described above.
  • the beam portion 77 is supported by the lower frame portion 71 via the supports 74 and 75.
  • metal fittings 771-773 that hold the heat exchangers 34, 41 of the heating unit 20 are fixed in place with the heating unit 20 attached to the top surface 541B of the insulating member 54.
  • metal fitting 771 is formed by bending a band-shaped metal plate into a U-shape.
  • Metal fitting 771 holds heat exchanger 34 by fitting heat exchanger 34 inside the U-shape.
  • one end of the band of metal fitting 771 is fixed to beam portion 77, and the other end of the band of metal fitting 771 is fixed to support pillar 75.
  • beam portion 77 and support pillar 75 support heat exchanger 34 via metal fitting 771.
  • the metal fittings 772 are formed by bending a strip-shaped metal plate into an L-shape.
  • the metal fittings 772 are fixed to the support posts 75 and upper frame section 72 with the inner corners of the L-shape covering the corners of the heat exchanger 34's exterior and the L-shaped plate surfaces abutting the -Y and -X faces of the heat exchanger 34.
  • the support posts 75 and upper frame section 72 support the heat exchanger 34 via the metal fittings 772.
  • metal fitting 773 like metal fitting 771, is formed by bending a band-shaped metal plate into a U-shape.
  • Metal fitting 773 holds heat exchanger 41 by fitting heat exchanger 41 inside the U-shape.
  • one end of the band of metal fitting 773 is fixed to beam portion 77, and the other end of the band of metal fitting 773 is fixed to support pillar 74.
  • beam portion 77 and support pillar 74 support heat exchanger 41 via metal fitting 773.
  • the uneven portion of the top surface 541B of the insulating member 54 supports the heat exchangers 34 and 41 from below.
  • the frame structure 70 supports the heat exchangers 34 and 41 from the sides via the metal fittings 771-773.
  • the heat exchangers 34 and 41 may be surrounded by another insulating material other than the insulating material 54.
  • the heat exchangers 34 and 41 are surrounded by the other insulating material, it is advisable to fix the other insulating material to the frame structure 70 while compressing it with the metal fittings 771-773. This allows the heat exchangers 34 and 41 to be fixed even more firmly in the water heater 1B.
  • the other insulating material be a soft material such as foamed polyethylene or foamed rubber.
  • the frame structure 70 described above is an example of a first frame that supports the side portion of a component as defined in this disclosure.
  • the heat exchangers 34 and 41 are an example of a component as defined in this disclosure.
  • the water heater 1B includes a frame structure 70 that is fixed to the top surface 541B of the insulating member 54 and supports the side surfaces of the heat exchangers 34, 41.
  • the bottom surfaces of the heat exchangers 34, 41 are supported by the uneven portion formed on the top surface 541B, and the side surfaces of the heat exchangers 34, 41 are supported by the frame structure 70, so that the heat exchangers 34, 41 are less likely to shift out of position. They are also less likely to come off.
  • the frame structure 70 is placed on the top surface 541B of the heat insulating member 54, which has uneven surfaces and supports the heat exchangers 34, 41 from below. As a result, the lower and side surfaces of the heat exchangers 34, 41 are supported by the same top surface 541B. This makes it difficult for the heat exchangers 34, 41 to shift position.
  • the lower frame portion 71 is simply placed on the top surface portion 541B of the insulating member 54, but the lower frame portion 71 may be fixed to the top surface portion 541B with fasteners such as bolts or screws, or with adhesive.
  • a drainage mechanism may further be provided on the top surface portions 541A and 541B of the heat insulating member 54.
  • a drain is provided on the top surface 541C of the insulating member 54.
  • FIG. 11 is a perspective view of a top surface 541C of a heat insulating member 54 provided in a water heater according to embodiment 3.
  • FIG. 12 is an enlarged top view of a portion of the top surface 541C.
  • an outer peripheral wall 55 is provided on the upper surface side of the top surface 541C of the heat insulating member 54, i.e., the +Z surface side, surrounding the outer periphery. Meanwhile, the uneven portion described in the first embodiment is formed into a convex surface 56 that becomes lower from the center toward the periphery. As a result, the portion between the outer peripheral wall 55 and the convex surface 56 forms the lowest bottom surface. As a result, a groove 57 is formed in that portion, running along the outer peripheral wall 55.
  • groove 57 runs along outer peripheral wall 55, it also passes near the corners on the +Y and -X sides of top surface 541C. As shown in FIG. 12, the portion of groove 57 that passes near the corners has a drain 58 in the shape of a round hole that penetrates top surface 541C in the Z direction. This connects the internal space of groove 57 with the internal space of drain 58. As a result, in groove 57, water that flows down from convex surface 56 of top surface 541C or outer peripheral wall 55 and accumulates is drained through drain 58.
  • groove 57 has a bottom lower than the uneven portion as defined in this disclosure, and is an example of a groove that surrounds the uneven portion.
  • a groove 57 is formed in the top surface 541C of the insulating member 54, surrounding the convex surface 56 on which the uneven portion is formed.
  • a drain 58 is formed in the groove 57. Therefore, in the water heater according to the third embodiment, even if water adheres to the top surface 541C, the water can be quickly drained.
  • the lower frame portion 71 of the frame structure 70 is simply placed on the top surface portion 541B of the heat insulating member 54.
  • the top surface portion 541B of the heat insulating member 54 is not limited to this.
  • the top surface portion 541B of the heat insulating member 54 may be fabricated by insert molding, whereby the frame structure 70 is fixed.
  • the top surface 541D of the insulating member 54 is integrated with the lower frame portion 71 of the frame structure 70 by insert molding.
  • FIG. 13 is a perspective view showing an example of a steel member 78 forming a lower frame portion 71 of a frame structure 70 provided in a water heater according to embodiment 4.
  • FIG. 14 is a perspective view of a top surface portion 541D of a heat insulating member 54 provided in a water heater according to embodiment 4.
  • FIG. 15 is a cross-sectional view taken along the XV-XV cutting line shown in FIG. 14.
  • the lower frame section 71 of the frame structure 70 is formed by combining three shaped steel members 78 shown in FIG. 13 in a U-shape.
  • the ends E1 and E2 in the extension direction are L-shaped in cross section, i.e., have the shape of an angle steel.
  • the central section C in the extension direction is U-shaped in cross section, i.e., has the shape of a channel steel.
  • the top surface 541D of the heat insulating member 54 is formed in a square shape when viewed from above, and the center portion protrudes from three of the four sides of the square when viewed from above.
  • the top surface 541D has protrusions 546 and 547 that protrude from the side wall surfaces.
  • FIG. 14 is a view from the +X side and the -Y side, the protrusion formed in the center of the side in the -X direction among the four sides mentioned above is not shown. Therefore, below, the three protrusions will be described using the two reference numerals 546 and 547.
  • the central portion C of the above-mentioned structural steel member 78 is inserted into each of the protrusions 546, 547.
  • the shape of the channel steel is inserted.
  • the structural steel member 78 is fixed to each of the protrusions 546, 547.
  • one flange portion 781 is embedded inside the protruding portion 546. That is, one flange portion 781 is integrated with the protruding portion 546 by insert molding. Furthermore, the portion of the web portion 783 connecting the flange portions 781 and 782 on the flange portion 781 side is also embedded inside the protruding portion 546. That is, a portion of the web portion 783 is also integrated with the protruding portion 546 by insert molding.
  • the shaped steel member 78 is firmly fixed to the protruding portion 546, i.e., the top surface portion 541D of the heat insulating member 54. As a result, the shaped steel member 78 reinforces the top surface portion 541D and increases the rigidity of the top surface portion 541D.
  • the above-mentioned frame structure 70 is an example of a first frame that supports the side portion of a part as defined in this disclosure.
  • the lower frame portion 71 is an example of a second frame that is insert molded into the outer periphery of the top surface portion as defined in this disclosure and reinforces the outer periphery.
  • a portion of the lower frame portion 71 of the frame structure 70 is embedded in the top surface portion 541D of the insulating member 54.
  • the frame structure 70 is integrated with the top surface portion 541D, increasing the rigidity of the top surface portion 541D.
  • the pump 33 is placed on the top surface portions 541A-541D of the heat insulating member 54. That is, the pump 33 is placed on the top surface portions 541A-541D, and thereby directly supported by the top surface portions 541A-541D.
  • the pump 33 is not limited to this.
  • the pump 33 may be indirectly supported by the top surface portions 541A-541D via other components.
  • the pump 33 is supported on the top surface 541E via the piping 321.
  • Figure 16 is a perspective view of the top surface 541E of the insulating member 54 provided in the water heater according to embodiment 5.
  • Figure 17 is a perspective view of the top surface 541E of the insulating member 54 into which the heating unit 20 provided in the water heater is fitted.
  • the top surface 541E of the heat insulating member 54 has a recess 337 in front of the multifunction device support part 320, i.e., on the -Y side.
  • the bottom surface of the recess 337 is located below the protrusion 333 located at the bottom of the pump 33 when the heating unit 20 shown in FIG. 17 is fitted to the top surface 541E. As a result, the pump 33 is not in contact with the top surface 541E.
  • the pump 33 is connected to a pipe 321 that extends downward from the multifunction device 32.
  • the pipe 321 fits into a multifunction device support part 320, which is a U-shaped groove in cross section as shown in FIG. 16 and is provided on the top surface part 541E.
  • the pipe 321 is supported by the top surface part 541E.
  • the pump 33 is connected to the pipe 321 configured in this way, and is thereby supported by the pipe 321. In other words, the pump 33 is supported by the top surface part 541E via the pipe 321.
  • the pump 33 contacts the top surface portions 541A-541D, so vibrations generated when the pump 33 is operating are transmitted to the top surface portions 541A-541D, resulting in noise.
  • the pump 33 is positioned away from the top surface portion 541E and is not in direct contact with the top surface portion 541E. Therefore, vibrations generated when the pump 33 is operating are less likely to be transmitted to the top surface portion 541E. As a result, the noise of the pump 33 can be suppressed in the water heater according to embodiment 5.
  • the piping 321 connected to the pump 33 is fitted into the multifunction device support part 320, so that the piping 321 is directly supported by the top surface part 541E.
  • the pump 33 is not directly supported by the top surface part 541E, but is positioned away from the top surface part 541E. For this reason, vibrations are not easily transmitted from the pump 33 to the top surface part 541E during operation. As a result, the water heater of embodiment 5 can suppress noise from the pump 33.
  • the hot water heaters 1A and 1B according to the embodiments 1-5 are assembled by, for example, (1) fitting the heating unit 20 into the unevenness of the top surface portions 541A-E of the heat insulating member 54, and (2) then fitting the heating unit 20 and the top surface portions 541A-541E into the portion of the hot water storage unit 50 excluding the top surface portions 541A-541E, for example, fitting them into the upper surface portions of the right side surface portion 542 and the left side surface portion 543 shown in FIG. 5.
  • the assembly method of the hot water heaters 1A and 1B according to the embodiments 1-5 is not limited to this.
  • the entire lower surface portion of the top surface portions 541A-E does not have to be fitted into the entire upper surface portions of the right side surface portion 542 and the left side surface portion 543 of the heat insulating member 54.
  • the heating unit 20 and the top surfaces 541A-541E may be attached to the right side surface 542 and left side surface 543 of the insulation member 54 by abutting a portion of the lower surface of the top surfaces 541A-541E against the upper surface portions of the right side surface 542 and left side surface 543 of the insulation member 54.
  • the water heater according to embodiment 6 has a number of protrusions on the underside of the top surface 541F, and these protrusions come into contact with the upper surfaces of the right side surface 542 and left side surface 543 of the insulating member 54, thereby attaching the top surface 541F to the right side surface 542 and left side surface 543 of the insulating member 54.
  • FIG. 18 is a perspective view of the top surface 541F of the insulating member 54 provided in the water heater according to embodiment 6.
  • FIG. 19 is an enlarged front view showing the internal structure of the housing 10 provided in the water heater.
  • the top surface 541F of the heat insulating member 54 has a cylindrical portion on the lower side, and multiple protrusions 351 are provided at the lower end of the outer periphery 350 of the cylindrical portion.
  • multiple protrusions 351, specifically at least three, are provided at equal intervals in the circumferential direction.
  • Each of the protrusions 351 is formed from the same material as the top surface 541F, for example, foamed plastic.
  • each of the protrusions 351 has the same shape as one another when viewed from the radial direction of the outer periphery 350, and as a result, they are all the same height as one another. Note that the protrusions 351 only need to be arranged in the circumferential direction, and do not have to be arranged at equal intervals in the circumferential direction.
  • the protrusion 351 is brought into contact with the upper surface portion of the right side surface 542 of the insulating member 54. Also, although not shown, another protrusion 351 is brought into contact with the upper surface portion of the left side surface 543 of the insulating member 54. In this way, the top surface 541F is placed on the right side surface 542 and left side surface 543 of the insulating member 54. As a result, on the top surface 541F, only the protrusion 351 is in contact with the right side surface 542 and left side surface 543.
  • the protrusions 351 are arranged at equal intervals in the circumferential direction at the lower end of the outer periphery 350, so that the load is evenly applied to each of the protrusions 351. Furthermore, the load of the heating unit 20 and the top surface 541F causes the protrusions 351 to be crushed, so that the gap between the bottom surface of the top surface 541F and the top surface of the hot water storage tank 51 surrounded by the right side surface 542 and the left side surface 543 of the insulating member 54 becomes as small as possible. As a result, the bottom surface of the top surface 541F comes into contact with the top surface of the hot water storage tank 51.
  • the protrusions 351 make the gap between the top surface 541F and the hot water storage tank 51 as small as possible, thereby improving the heat retention of the top surface of the hot water storage tank 51. Furthermore, since the protrusions 351 are arranged at equal intervals in the circumferential direction of the outer periphery 350, the top surface 541F does not incline with respect to the top surface of the right side surface 542 and the left side surface 543. As a result, the water heater according to embodiment 6 can be assembled with high precision.
  • right side portion 542 and the left side portion 543 of the insulating member 54 are examples of side portions that cover the sides of the hot water storage tank as defined in this disclosure.
  • the top surface portion 541F has a plurality of protrusions 351 arranged in the circumferential direction at the lower end of the outer peripheral portion 350.
  • the top surface portion 541F is attached to the side portion by contacting the upper surface portions of the right side surface portion 542 and the left side surface portion 543 of the heat insulating member 54 with the plurality of protrusions 351.
  • the top surface portion 541F since the plurality of protrusions 351 are arranged in the circumferential direction at the lower end of the outer peripheral portion 350, the top surface portion 541F does not incline with respect to the upper surface portions of the right side surface portion 542 and the left side surface portion 543.
  • the water heater according to the sixth embodiment is assembled with high precision. This makes it possible to minimize the gap between the top surface portion 541F and the upper surface portions of the right side surface portion 542 and the left side surface portion 543 as much as possible, thereby improving the heat retention of the water heater according to the sixth embodiment.
  • the multiple protrusions 351 are also made of foamed plastic, and are crushed by the weight of the top surface 541F when the top surface 541F is placed on the upper surface of the right side surface 542 and the left side surface 543. The multiple protrusions 351 are crushed by the weight of the top surface 541F, thereby closing the gap between the top surface 541F and the upper surface of the hot water storage tank 51. As a result, the multiple protrusions 351 can improve the heat retention of the hot water heater of embodiment 6.
  • water heaters 1A and 1B are not limited to this.
  • the expansion tank 31, the multifunction device 32, the pump 33, the heat exchangers 34, 41, the scale trap 42, and the piping 44, 45 of the heating unit 20 are fitted into the uneven portion formed on the top surface 541A of the insulating member 54.
  • the uneven portion is not limited to this.
  • the heating device refers to a device that heats hot and cold water, for example, the heating unit 20. Therefore, at least one of the expansion tank 31, the multifunction device 32, the pump 33, the heat exchangers 34, 41, the scale trap 42, and the piping 44, 45 of the heating unit 20 may fit into the uneven portion.
  • the pump 43 does not fit into the uneven portion in the first embodiment, it may fit into the uneven portion.
  • the insulating member 54 is formed by top surface portions 541A-541D, right side surface portion 542, left side surface portion 543, and bottom surface portion 544.
  • the insulating member 54 is not limited to this.
  • the insulating member 54 may be disposed between the heating device and the hot water storage tank 51, and may have a top surface portion formed with an uneven portion into which at least one component constituting the heating device is fitted and which supports at least one component, and may cover the hot water storage tank 51. Therefore, the insulating member 54 may be further divided into the right side surface portion 542 and the left side surface portion 543.
  • the insulating member 54 is made of expanded polystyrene, but the insulating member 54 may be made of other insulating materials, for example, expanded polyurethane.
  • the water heaters 1A, 1B are not limited to the above-described embodiments 1-6, and various modifications and substitutions can be made thereto. Various aspects of the present disclosure are described below as appendices.
  • a hot water storage tank is disposed under the heating device and stores the hot water heated by the heating device.
  • a heat insulating member having a top surface portion disposed between the heating device and the hot water tank and covering the hot water tank; Equipped with the top surface portion has at least one of a recess that fits with at least one component constituting the heating device and supports the component, and a protrusion that abuts against at least one component constituting the heating device and determines a position of the component; Water heater.
  • the top surface portion has the recess,
  • the recess has a bottom portion that supports a lower surface portion of the component and an inner wall portion that supports a side surface portion of the component. 2.
  • the water heater according to claim 1 (Appendix 3)
  • the top surface portion has the recess,
  • the component is a heat exchanger that exchanges heat between the hot water and another hot water or a refrigerant, The recess is fitted to a lower portion of the heat exchanger to support the lower portion.
  • the top surface portion has the convex portion,
  • the component is a heat exchanger that exchanges heat between the hot water and another hot water or a refrigerant, The protrusion abuts against a side surface of the heat exchanger to define a position of the side surface. 4.
  • the water heater according to claim 1 The water heater according to claim 1 .
  • the top surface portion has the recess
  • the part is a pump having a cylindrical outer shape and sending the separate hot and cold water to a heat exchanger,
  • the recess is recessed in a semi-cylindrical shape, and a cylindrical outer portion of the pump is fitted into the recess.
  • the water heater according to claim 1 (Appendix 6)
  • the component is a pipe connected to a pump that sends hot water to a heat exchanger, the hot water being separate from the hot water.
  • the recess is a groove having a U-shape in cross section, into which the pipe is fitted,
  • the pump is disposed away from the top surface. 5.
  • the water heater according to claim 1 is
  • the heat insulating member is disposed under the top surface portion and further has a side surface portion covering a side of the hot water storage tank,
  • the top surface portion has a plurality of protrusions arranged in a circumferential direction at a lower end of an outer circumferential portion, and is attached to the side surface portion by the plurality of protrusions contacting an upper surface portion of the side surface portion.

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  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Housings, Intake/Discharge, And Installation Of Fluid Heaters (AREA)
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PCT/JP2024/021563 2023-07-06 2024-06-13 給湯機 Pending WO2025009355A1 (ja)

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