JP2012197983A - Storage type water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a storage type water heater with a vibration control structure achieved with a simple structure.SOLUTION: The storage type water heater includes: a hot water storage tank 3 for storing hot water; and a bath circulation pump 8 for delivering hot water. The storage type water heater is equipped with: heat insulating materials 31, 32 formed in such a shape so as to cover the hot water storage tank 3; an insertion heat-insulating-material 34 which is insertion-fitted and fixed in a heat-insulating-material cutout part 35 formed in the heat insulating materials 31, 32; and a pump support structure 54 fixed to the insertion heat-insulating-material 34. The pump support structure 54: has a pump installation part 542 where the bath circulation pump 8 is installed; and is formed in such a way that the pump installation part 542 protrudes outside when the insertion heat-insulating-material 34 is insertion-fitted in the heat insulating materials 31, 32.

Description

  The present invention relates to a hot water storage type water heater.

  Conventionally, in a hot water storage type water heater, in order to keep the hot water tank warm and to insulate, the outer side of the hot water tank is covered with the foamed molded heat insulating material formed on the outer side of the hot water tank and divided into four parts, upper and lower and left and right. A configuration is known.

  In addition, a circulating pump for circulating water and hot water in the hot water heater is used in the hot water heater with a reheating function. As a method for holding the circulation pump in the water heater, there is known a method in which an anti-vibration base is fastened by inserting a mounting sheet metal into a foamable molded heat insulating material (see, for example, Patent Document 1). According to this method, since the circulation pump is held in the foamable molded heat insulating water heater, vibration generated when the pump is driven is reduced.

JP 2008-57794 A

  However, in the conventional vibration-proof structure described above, it is necessary to embed the attachment sheet metal in the foaming process of the foamable molded heat insulating material. For this reason, there are problems that the manufacturing cost of the foamed molded heat insulating material increases, and that a plurality of parts are required and the structure is complicated.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a hot water storage type hot water heater capable of realizing a vibration isolation structure for a pump with a simple structure.

  A hot water storage type hot water supply apparatus according to the present invention is a hot water storage type hot water supply apparatus including a hot water storage tank for storing hot water and a pump for supplying hot water, a heat insulating material formed in a shape covering the hot water tank, and heat insulation A heat insulating material for insertion that is inserted and fixed in a fitting portion provided in the material, and a pump support member that is fixed to the heat insulating material for insertion, and the pump support member is provided for installing the pump. It has a pump installation part, and when the heat insulating material for insertion is inserted in the fitting part, the pump installation part is formed in the shape which protrudes outside.

  According to the present invention, it is possible to provide a hot water storage type water heater capable of realizing a vibration isolation structure for a pump with a simple structure.

It is a circuit block diagram of the hot water supply apparatus as Embodiment 1 of the hot water storage type water heater of this invention. It is a figure which shows the heat insulation structure of a hot water storage tank. It is a figure which shows the structure of the heat insulating material for insertion, Fig.3 (a) is a perspective view of the heat insulating material for insertion, FIG.3 (b) shows the heat insulating material for insertion from the direction of arrow A in Fig.3 (a). Each front view is shown. It is a figure for demonstrating the insertion structure of the heat insulating material notch part and the heat insulating material for insertion. It is a disassembled perspective view for demonstrating the structure for fixing the bath circulation pump to the heat insulating material for insertion, and its component structure. It is a perspective view which shows the state which fixed the bath circulation pump to the heat insulating material for insertion. It is a top view which shows the state which fixed the bath circulation pump to the heat insulating material for insertion. It is a figure for demonstrating the fastening method of a pump support stand and the heat insulating material for insertion.

  Embodiments of the present invention will be described below with reference to the drawings. In addition, the same code | symbol is attached | subjected to the element which is common in each figure, and the overlapping description is abbreviate | omitted.

Embodiment 1 FIG.
FIG. 1 is a circuit configuration diagram of a hot water supply apparatus as Embodiment 1 of a hot water storage type hot water supply apparatus of the present invention. The hot water supply apparatus shown in FIG. 1 is composed of a tank unit 1 and a heat pump unit 2, and the two units are connected by a boiling forward pipe 5 and a boiling return pipe 6. The heat pump unit 2 is a heat source for absorbing low-temperature water supplied from the tank unit 1 by absorbing atmospheric heat into the refrigerant by the refrigeration cycle.

  A cylindrical hot water storage tank 3 for storing hot water heated by the heat pump unit 2 is installed inside the tank unit 1. The tank unit 1 side of the above-mentioned boiling forward piping 5 and the boiling return piping 6 is connected to the upper part and the lower part of the hot water storage tank 3, respectively. A heating circulation pump 7 for supplying water taken out from the lower part of the hot water storage tank 3 to the heat pump unit 2 is disposed in the middle of the heating forward piping 5. In addition, a water supply pipe 4 for supplying water from a water source to the hot water heater is disposed below the hot water storage tank 3.

  One end of a bath heat exchange outlet pipe 10 is connected to the upper part of the hot water storage tank 3. The other end of the heat exchange pipe 10 for the bath is connected to the inlet side of the heat exchange pipe 11 for the bath included in the heat exchanger 20. The heat exchanger 20 has a structure in which hot water in the heat exchange pipe 17 is heated by giving heat from the bath heat exchange pipe 11 to the heat exchange pipe 17 described later. A heat exchange return pipe 12 for the bath is connected to the outlet side of the heat exchange pipe 11 for the bath. A bath circulation heat source pump 9 is arranged in the middle of the bath heat exchange return pipe 12, and its downstream side is connected to the lower part of the hot water storage tank 3.

  An upper end of the hot water storage tank 3 is connected to one end of a bath circulation outgoing pipe 13. A bath solenoid valve 19 is arranged in the middle of the bath circulation outgoing pipe 13, and the downstream side branches off into a heat exchanger outgoing bypass pipe 14 and a bath outgoing pipe 15. The bath solenoid valve 19 is a check valve, and is configured such that hot water does not flow back into the hot water circulation tank 13 in the hot water storage tank 3. The other end of the bath outlet pipe 15 is connected to the bath tub 18, and the other end of the heat exchanger outlet bypass pipe 14 is connected to the inlet side of the heat exchange pipe 17 included in the heat exchanger 20 described above. ing. The outlet side of the heat exchange pipe 17 is connected to one end of the return pipe 16 for bath. The other end of the bath return pipe 16 is connected to the bathtub 18. Further, a bath circulation pump 8 is disposed in the middle of the bath return pipe 16.

  In such a hot water storage type water heater, when hot water in the hot water storage tank 3 is supplied into the bath tub 18, the hot water in the hot water storage tank 3 flows through the hot water circulation pipe 13, the hot water solenoid valve 19, and the hot water pipe 15. The hot water is supplied to the bath tub 18 after passing through. On the other hand, when performing normal reheating, the bath circulation pump 8 and the bath circulation heat source pump 9 are driven. Thereby, the hot water in the bathtub that has passed through the bath return pipe 16 is heated by the heat exchanger 20, then passes through the bath return pipe 15 and is returned to the bath again.

  Next, a characteristic configuration of the hot water supply apparatus according to the first embodiment will be described with reference to FIG. FIG. 2 is a view showing a heat insulating structure of the hot water storage tank 3. As shown in FIG. 2, the cylindrical hot water storage tank 3 is covered with heat insulating materials 30, 31, 32, and 33 divided into an upper part, a central right part, a central left part, and a lower part of the outer shell. . The heat insulating materials 30, 31, 32, and 33 are heat insulating materials for heat insulation of the hot water storage tank 3, and are formed of, for example, a foamed molded heat insulating material such as expanded polystyrene. The heat insulating materials 31 and 32 covering the central portion (cylindrical side surface portion) of the hot water storage tank 3 are provided with a concave heat insulating material notch portion 35 (fitting portion) across the surfaces where they abut each other. The hot water supply apparatus according to the first embodiment is characterized by a structure in which the bath circulation pump 8 is fixed to a heat insulating material 34 for insertion, which will be described later, and is inserted into the heat insulating material notch 35. Hereinafter, these structures will be described in more detail.

  FIG. 3 is a view showing the structure of the heat insulating material 34 for insertion. 3A is a perspective view of the heat insulating material 34 for insertion, and FIG. 3B is a front view of the heat insulating material 34 for insertion viewed from the direction of arrow A in FIG. 3A. ing. As shown in these drawings, the heat insulating material 34 for insertion includes a cutting portion 50 (slit groove) for accommodating a pump support frame 54 (pump support member) described later, and separation of the contact surfaces of the heat insulating materials 31 and 32. A key part 51 (protrusion part) for suppressing and a drain plug surrounding part 52 for enclosing a bath circulation pump drain plug 55 described later are formed.

  FIG. 4 is a view for explaining a fitting structure between the heat insulating material notch 35 and the heat insulating material 34 for insertion. As shown in this figure, the key part 51 is a protrusion that extends in the direction of insertion into the heat insulating material notch 35 formed in the heat insulating materials 31 and 32, and the outer corner of the tip is chamfered. It has become. On the other hand, the heat insulating material notch 35 is formed as a rectangular recess, and its outer shape is set to a size that fits the outer shape of the heat insulating material 34 for insertion. Further, further concave portions 352 for inserting the key portions 51 are respectively formed at the longitudinal ends of the bottom surface 351 of the concave portions. According to such a structure, by inserting the heat insulating material 34 for insertion into the heat insulating material notch 35, the key portion 51 of the heat insulating material 34 for insertion hangs on the respective recesses 352 of the heat insulating materials 31, 32. The situation where the contact surfaces of the heat insulating materials 31 and 32 are separated can be effectively suppressed.

  FIG. 5 is an exploded perspective view for explaining the structure for fixing the bath circulation pump 8 to the heat insulating material 34 for insertion and its component configuration. 6 is a perspective view showing a state where the bath circulation pump 8 is fixed to the heat insulating material 34 for insertion, and FIG. 7 is a top view showing a state where the bath circulation pump 8 is fixed to the heat insulating material 34 for insertion. is there. As shown in these drawings, the bath circulation pump 8 is fixed to the insertion heat insulating material 34 by using a pump support frame 54. The pump support base 54 includes a fixing portion 541 on the side fixed to the heat insulating material 34 for insertion, a pump installation portion 542 on the side where the bath circulation pump 8 is installed, and the fixing portion 541 and the pump installation portion 542. And a bridging portion 543 for passing.

  As shown in FIGS. 5 to 7, the bath circulation pump 8 is fastened to the pump installation part 542 of the pump support frame 54 by the pump fastening screw 58. Further, in the pump support frame 54, the bridging portion 543 is inserted into the gap of the cutting portion 50, the pump installation portion 543 protrudes toward the surface 341 side of the insertion heat insulating material 34, and the fixing portion 541 is inserted. It is fixed to the heat insulating material 34 for insertion in the arrangement | positioning closely_contact | adhered to the back surface 343. The insertion heat insulating material 34 and the pump support frame 54 are provided with holes 342 and 544 so as to penetrate from the surface 341 side to the fixing portion 541. Here, specifically, the pump support frame 54 and the heat insulating material 34 for insertion are fastened by inserting the vibration-proof rubber (well nut) 56 and the vibration-proof rubber fastening screw 57 into the holes 342 and 544. Is done.

  FIG. 8 is a view for explaining a fastening method between the pump support base 54 and the heat insulating material 34 for insertion. As shown in this figure, when the anti-vibration rubber 56 is inserted in a state where the insertion heat insulating material 34 and the fixing portion 541 of the pump support base 54 are overlapped, and the anti-vibration rubber fastening screw 57 is screwed in, the anti-vibration rubber 56 The intermediate portion is deformed and both are fastened. According to such a fastening structure, the anti-vibration rubber fastening screw 57, which has a low anti-vibration effect, does not directly touch the pump support base 54 connected to the bath circulation pump 8 that is the source of vibration, and thus has an anti-vibration effect. Only the heat insulating material 34 for insertion and the vibration isolating rubber 56 are in contact with each other, and vibration is effectively suppressed. In addition, it is good also as a structure which puts a washer between the anti-vibration rubber 56 and the anti-vibration rubber fastening screw 57 at the time of fastening, and relieve | moderates the stress of an attachment surface.

  In addition, the gap of the cutting part 50 is set to a slit width in which the bridging part 543 does not contact the cutting part 50 even when the bath circulation pump 8 is driven to vibrate. As a result, it is possible to effectively suppress the situation in which the vibration of the bath circulation pump 8 is directly transmitted to the cutting unit 50 via the bridging unit 543.

  Further, as shown in FIGS. 5 to 7, a drain plug surrounding portion 52 having a through hole 521 into which the bath circulation pump drain plug 53 is inserted is formed in the central portion on the surface 341 side of the heat insulating material 34 for insertion. Yes. According to such a configuration, even if hot water leaks from the circulation pump drain plug 53, it is possible to effectively suppress the situation where these hot water is scattered in the water heater.

  As described above, by adopting a structure in which the heat insulating material 34 for insertion in which the bath circulation pump 8 is fixed is inserted into the heat insulating material notch portions 35 of the heat insulating materials 31 and 32, the number of parts is small and the structure is simple. A costly fixed structure of the circulation pump 8 can be obtained. In addition, by fastening the heat insulating material for insertion 34 and the pump support base 54 with the vibration isolating rubber 56 and the vibration isolating rubber fastening screw 57, the influence of vibration from the bath circulation pump 8 which is the source of vibration to the inside of the water heater is reduced. Since it decreases as much as possible, it is possible to effectively reduce the vibration noise. Further, by inserting the key 51 of the heat insulating material 34 for insertion into the recess 352 of the heat insulating material notch 35, separation of the contact surfaces of the heat insulating materials 31 and 32 can be effectively suppressed. Further, by providing the drain plug enclosure 52 in the heat insulating material 34 for insertion, even if water leaks from the connection point between the circulation pump 8 and the circulation pump drain plug 53, water droplets are applied to the surrounding functional parts. Damage can be prevented.

  By the way, in the hot water storage type hot water heater of the first embodiment described above, the bath circulation pump 8 is fixed to the heat insulating material 34 for insertion. It may be fixed. Further, in the hot water storage type water heater of the first embodiment described above, the heat insulating material 34 for insertion and the pump support frame 54 are fastened by the vibration isolation rubber 56 and the vibration isolation rubber fastening screw 57. As long as it can be fastened so that the metal part does not directly contact 54, a rubber washer or the like may be used instead of the anti-vibration rubber (well nut) 56, for example.

  Further, in the hot water storage type water heater of the first embodiment described above, the contact surfaces of the heat insulating materials 31 and 32 are inserted by inserting the key portion 51 of the heat insulating material 34 for insertion into the concave portion 352 of the heat insulating material notch portion 35. However, the shapes of the key 51 and the recess 352 are not limited to the above-described embodiments. That is, the key 51 and the recess 352 may have any fitting shape that can generate a resistance against the force in the separation direction of the contact surface. For example, the key 51 along the surface 341 of the insertion heat insulating material 34. It may be provided in a direction protruding from the outer shape, or a recess may be provided on the insertion heat insulating material 34 side, and a key portion may be provided in the heat insulating material notch 35. More preferably, the insertion heat insulating material 34 may be made of a material having higher strength than the heat insulating materials 31 and 32 in order to suppress separation. (For example, lowering the foaming rate to increase strength)

  Further, in the hot water storage type water heater of the first embodiment described above, the drain plug surrounding portion 52 having the through hole 521 is formed in the central portion on the surface 341 side of the heat insulating material 34 for insertion. The shape is not particularly limited as long as it is a shape that can cover the periphery of the connection portion between the circulator 8 and the circulation pump drain plug 53.

  Moreover, in the hot water storage type water heater of Embodiment 1 described above, the heat insulating material notch 35 is formed across the contact surfaces of the heat insulating materials 31 and 32, but the heat insulating materials contact each other. If it arrange | positions in the position which straddles a surface, the arrangement | positioning will not specifically limit.

3 Hot water storage tank 8 Bath circulation pump (pump)
30, 31, 32, 33 Insulating material 34 Insulating material 35 for insertion Insulating material notch (fitting part)
50 Cutting part (slit groove)
51 Key (protrusion)
52 Drainage plug enclosure 53 Drainage plug (drainage)
54 Pump support frame (pump support member)
541 Fixing part 542 Pump installation part 56 Anti-vibration rubber (well nut)
57 Anti-vibration rubber fastening screw

Claims (6)

A hot water storage water heater comprising a hot water storage tank for storing hot water and a pump for supplying hot water,
A heat insulating material formed in a shape covering the hot water storage tank;
A heat insulating material for insertion, which is fixed by being inserted into a fitting portion provided in the heat insulating material;
A pump support member fixed to the heat insulating material for insertion,
The pump support member has a pump installation portion for installing the pump, and when the heat insulating material for insertion is inserted into the fitting portion, the pump installation portion protrudes to the outside. A hot water storage type water heater characterized by being formed.   The hot water storage type hot water heater according to claim 1, wherein the pump support member is fixed to the heat insulating material for insertion through a vibration isolating member. The heat insulating material is configured by contacting at least two heat insulating materials, and the fitting portion is formed across the contact surface of the two heat insulating materials,
The hot water storage type hot water supply apparatus according to claim 1 or 2, wherein the heat insulating material for insertion and the fitting portion have a fitting structure that generates a resistance against separation of the contact surface. The heat insulating material for insertion further includes a groove for the pump support member to protrude to the outside,
The hot water storage type hot water heater according to any one of claims 1 to 3, wherein the groove is set to have a groove width that does not contact the pump support member and the groove when the pump is operated. .   The hot water storage type hot water heater according to any one of claims 1 to 6, wherein the heat insulating material for insertion further includes a surrounding portion surrounding a drainage portion of the pump installed in the fixed portion.   The hot water storage type hot water heater according to any one of claims 1 to 5, wherein the heat insulating material for insertion is made of a material having higher mechanical strength than the heat insulating material.

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