JP4894364B2 - Water heater - Google Patents

Description

  The present invention relates to a hot water supply apparatus having a heat insulating material that reduces the amount of heat released from a hot water storage can body.

  Conventionally, this type of hot water supply device has been designed to keep the temperature of hot water stored in a hot water storage can by surrounding the outer shape of the hot water storage can with a plurality of molded heat insulating materials as shown in FIG. And according to this structure, compared with the case where glass wool is wound as a heat insulating material around a hot water storage can body, the man-hour at the time of manufacture assembly is reduced significantly, and workability | operativity improved. (For example, refer to Patent Document 1).

In addition, considering the small housing situation in Japan, it will be required to reduce the size of the entire hot water supply system, but the capacity of the hot water storage can itself will decrease accordingly. If the capacity of the hot water storage can is reduced, the hot water problem that the hot water to be discharged in the hot water storage can be exhausted easily occurs, so the effect of the temperature drop due to the heat dissipation of the stored hot water becomes serious. Keeping warm water in the body is an important issue.
JP-A-8-327517

  However, in the above conventional technique, when the outer shape of the hot water storage can body is surrounded by the molded heat insulating material, in order to minimize the amount of heat dissipation, the molded heat insulation is formed so as to have a uniform thickness around the hot water storage can body. However, when covering the approximately cylindrical shape of the hot water storage can with the molded heat insulating material, the outer shape of the hot water storage can body is adjusted so that the molded heat insulating material has a uniform thickness according to the substantially cylindrical shape. If the casing for storing the hot water storage can body is substantially square, the casing and the molded heat insulating material surrounding the outer shell of the hot water storage can body may come into contact with each other. In addition, variations occur in the manufacturing process of surrounding the outer shell of the hot water storage can body with the molded heat insulating material, and depending on the degree of variation, the housing and the hot water storage can body may be in contact with each other. As a result of contact, heat is radiated to the outside of the housing, and there is a problem that the heat retaining performance is lowered.

  The present invention solves the above-mentioned conventional problems, and even if variations occur in the manufacturing process of surrounding the hot water storage can body with a molded heat insulating material, the hot water storage body and the housing for storing the hot water storage can body are in contact with each other. An object of the present invention is to provide a hot water supply device that does not need to be performed.

In order to solve the above-described conventional problems, a hot water supply apparatus of the present invention includes a substantially cylindrical hot water storage can body for storing hot water, and a foam heat insulating material disposed so as to cover the periphery of the hot water storage can body. A front-side heat insulating material, a rear-side heat insulating material forming the rear surface side, a substantially rectangular housing that houses the hot water storage can body and the foamed heat insulating material, and the front-side heat insulating material and the rear surface side The heat insulating material is provided with a flat portion forming a side portion of the substantially rectangular housing and an inclined flat portion forming a space, and is opposed to the flat portion forming the side portion of the substantially rectangular housing. In this configuration, the inclined plane-shaped joining portion is located at the position where the joint is located .

  As a result, an inclined flat surface portion is provided at a location where the foamed heat insulating material disposed so as to cover the periphery of the hot water storage can body and the housing for storing the hot water storage can body are in contact with each other. Since a space can be reliably formed between the heat insulating materials, contact between the housing and the hot water storage can body can be prevented while minimizing the amount of heat released.

  Even if variations occur in the manufacturing process of enclosing the hot water storage can body with a molded heat insulating material, it is possible to provide a hot water supply device in which the hot water storage can body and the housing for storing the hot water storage can body do not come into contact with each other.

A hot water supply apparatus according to a first aspect of the present invention is a substantially cylindrical hot water storage can body for storing hot water, and a foam heat insulating material disposed so as to cover the periphery of the hot water storage can body . Configure the rear side
And a substantially rectangular housing that houses the hot water storage can and the foam insulating material, and the substantially rectangular housing is provided on the front insulating material and the rear insulating material. A flat surface portion that forms the side portion and an inclined flat surface portion that forms a space are provided, and the inclined flat surface portion is joined to a position facing the flat surface portion that forms the side portion of the substantially rectangular housing. Since the space is reliably formed between the housing for storing the hot water storage can body and the foamed heat insulating material, the heat insulating effect is improved by the formed space, and the amount of heat released. It is possible to prevent contact between the casing and the hot water storage can body while minimizing the above.

In addition, since the inclined flat portions of the front surface side heat insulating material and the rear surface side heat insulating material are matched, the housing and the foam heat insulating material are less likely to contact each other, and a space can be provided more reliably.

In addition, it is possible to more reliably avoid the contact between the casing and the foam insulation, and to form a space. The formed space improves the heat insulation effect, minimizing the amount of heat dissipation, while minimizing the amount of heat dissipation. Can be prevented.

In the hot water supply apparatus of the second invention, in particular, in the first invention, the foam heat insulating material includes a front surface side heat insulating material constituting the front surface side, a rear surface side heat insulating material constituting the rear surface side, and a ceiling constituting the top surface side. It is comprised by the surface side heat insulating material and the lower surface side heat insulating material which comprises a lower surface side, and the said front side heat insulating material, the said rear surface side heat insulating material, the said top surface side heat insulating material, and the said lower surface side heat insulating material are joined. Since the foamed heat insulating material is formed by molding by forming the inclined flat surface portion in the portion, it is possible to easily form a space between the hot water storage can body and the housing .

The hot water supply apparatus of the third invention is the hot water supply apparatus of the third invention, particularly in the first or second invention, wherein the hot water storage can has a leg portion, and a positioning portion for positioning the leg portion on the front side heat insulating material and / or the rear side heat insulating material. By providing, the hot water storage can body and foam insulation can be securely fixed, and the positioning part is the reference for assembly, so the height and rotation direction are positioned, and the foam insulation formed from multiple parts is joined Since it becomes easy to match the shape in the joint part to perform, it becomes difficult to contact a housing | casing and a foam heat insulating material further, and a space can be provided more reliably.

The hot water supply apparatus according to the fourth aspect of the present invention is the variation in assembly particularly in the first to third aspects of the invention, by providing the front side heat insulating material and / or the rear surface side heat insulating material with the push pin avoiding the inclined flat portion. Thus, even if a deviation occurs in the rotation direction, the push pin does not interfere with the housing.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a configuration diagram of a hot water supply apparatus according to the first embodiment of the present invention, and FIG. 2 is an exploded view of a main part of the hot water supply apparatus according to the present embodiment. 1 and 2, a hot water supply device 100 supplies water into a case 200, a hot water storage can body 102 for storing hot water, a foam insulation 300 covering the hot water storage can body 102, and the hot water storage can body 102. There are a water supply pipe 201 for performing hot water and a hot water discharge pipe 202 for discharging hot water stored in the hot water storage can body 102. In addition, a heat exchanger 203 is disposed inside the casing 200, and heats hot water circulating as hot water in the bathtub or hot water for floor heating and hot water stored in the hot water storage can body 102. To be exchanged.

  Further, in the present embodiment, the heat pump unit 101 using the heat pump cycle as a heat source is used as a heating source for heating the hot water in the hot water storage can body 102. However, the present invention is not limited to this. A hot water supply apparatus configured to heat the low-temperature water in the tank may be used.

  The foam heat insulating material 300 covering the hot water storage can body 102 includes a front surface heat insulating material 310 covering the front portion of the hot water storage can body 102, a rear surface heat insulating material 320 covering the rear portion, and a top surface heat insulating material 330 covering the ceiling portion. And the lower surface side heat insulating material 340 which covers a bottom part, and each heat insulating material is comprised with a foam heat insulating material.

  FIG. 3 is a top plan view of the housing 200 with the top plate removed. In FIG. 3, the hot water storage can body 102 is covered with a front surface side heat insulating material 310, a rear surface side heat insulating material 320, a top surface side heat insulating material 330, and a lower surface side heat insulating material 340 and housed in the housing 200. In general, when the substantially cylindrical hot water storage can body 102 is housed in the substantially rectangular housing 200, the hot water storage can body 102 covered with the foam heat insulating material and the substantially rectangular housing 200 are substantially rectangular. Interference is likely to occur at locations where the front surface 210 of the housing 200, the rear housing 220, the right housing 230, and the left housing 240 form a flat surface. Therefore, by providing a sloped flat surface portion at a location facing the flat surface portion forming the housing 200, interference is prevented by forming a space between the housing 200 and the hot water storage can body 102. In the present embodiment, the front-side heat insulating material 310 and the rear-side heat insulating material are disposed at locations where the front-side heat insulating material 310 and the rear-side heat insulating material 320 are joined to face the right housing portion 230 and the left housing portion 240. 320, flat portions 311 and 321 each having an inclined shape are formed over the entire longitudinal length of each heat insulating material, and flat portions 312 that are also inclined at positions facing the front portion 210 and the rear portion 220 of the case, respectively. 323 is formed.

  FIG. 4 is a local cross-sectional view of a positioning portion provided on the front side heat insulating material of the hot water supply apparatus in the present embodiment, FIG. 5 is an inner front view of the front side heat insulating material of the hot water supply apparatus in the present embodiment, and FIG. FIG. 7 is a top plan view of a chassis (housing bottom) for fixing a hot water storage can body, and FIG. 8 is a local sectional view of the hot water supply apparatus according to the present embodiment. It is. 4 to 8, a can body leg fitting 103 is welded and fixed to the hot water storage can body 102 with a positioning jig, and a can body leg column 104 is inserted into the can body leg fitting 103, and further to the can body leg fitting 103. It is fixed with screws. The hot water storage can body 102 is attached to the housing bottom 250 via a can body leg mounting plate 105. Further, when the hot water storage can body 102 is covered with the front-side heat insulating material 310, a positioning portion is provided on the front-side heat insulating material 310 at a place where the can body leg fitting 103 and the front-side heat insulating material 310 abut. In the present embodiment, a flat portion 313 is provided as a positioning portion so as to come into contact with the flat portion of the can leg fitting 103. By providing such a flat portion 313, the can body leg metal fitting 103 and the flat portion 313 come into contact with each other, so that the hot water storage can body 102 and the front side heat insulating material 310 are positioned. The displacement in the rotation direction of the material 310, the rear surface side heat insulating material 320, the top surface side heat insulating material 330, and the lower surface side heat insulating material 340) can be prevented.

  Further, as shown in FIG. 8, when the front-side heat insulating material 310 and the rear-side heat insulating material 320 are assembled, the inclined flat surface portions formed at positions facing the right portion 230 and the left portion 240 are the front-side heat insulating materials. Although formed on each of the material 310 and the rear surface side heat insulating material 320, it is desirable that the combination portion is formed in a series.

  As described above, the foam heat insulating material 300 (at the position facing the housing front part 210, the housing rear part 220, the housing right part 230, and the housing left part 240 forming the flat part of the substantially square housing 200 ( The front side heat insulating material 310, the rear surface side heat insulating material 320, the top surface side heat insulating material 330, and the lower surface side heat insulating material 340) are provided with inclined planes so that the front side heat insulating material 310, the rear surface side heat insulating material 320, Even if the variation in the rotation direction generated when the surface-side heat insulating material 330 and the lower surface-side heat insulating material 340 are assembled and the variation due to the inclination of the hot water storage can body 102 occur, the air between the casing 200 and the foamed heat insulating material 300 A layer can be formed. Needless to say, if the inclination angle is made larger, an air layer is more reliably formed between the housing 200 and the foam heat insulating material 300.

In addition, in order to provide a compact hot water supply device, there is a dimensional restriction inside the housing 200, and the foam pin insulation that is easier to form a heat insulating shape than glass wool is always required to be an extrusion pin mark for a molding die. 322 is formed. Therefore, in the present embodiment, as shown in FIG. 8, the extrusion pin mark 322 is provided so as to avoid the inclined flat portion. Therefore, the extruding pin mark 322 and the housing 200 do not interfere with the variation in the rotational direction that occurs when the foam heat insulating material 300 is assembled, and the heat insulating effect can be maintained.

  As described above, it is possible to improve the heat insulating effect by forming a space between the foam heat insulating material and the housing, and by covering the foam heat insulating material with the hot water storage can body by providing the inclined flat surface portion. Even if variations occur in the rotation direction in the manufacturing process, the housing and the foamed heat insulating material do not interfere with each other, and the heat insulating effect can be reliably maintained.

  As described above, the present invention can be applied not only to heat pump water heaters but also to electric water heaters.

The block diagram of the hot-water supply apparatus in the 1st Embodiment of this invention Exploded view of the main part of the water heater in the same embodiment Top plan view with the top plate removed in the same embodiment Local sectional view of the positioning portion in the same embodiment Inside front view of the front-side heat insulating material in the same embodiment Lower plan view of the embodiment with the bottom plate removed Bottom top view of the same embodiment Local sectional drawing of the hot-water supply apparatus in the embodiment Configuration diagram of a conventional electric water heater

DESCRIPTION OF SYMBOLS 100 Hot-water supply apparatus 101 Heat pump unit 103 Can body leg metal fittings 104 Can body leg pillar 105 Can body leg mounting plate 200 Case 201 Water supply pipe 202 Hot water pipe 203 Heat exchanger 210 Case front part 220 Case rear part 230 Case right part 240 Case left portion 250 Case bottom portion 300 Foam heat insulating material 310 Front side heat insulating material 311, 312 Inclined flat surface portion 313 Flat portion 320 Rear surface side heat insulating material 321, 323 Inclined flat surface portion 322 Extrusion pin trace 330 Top surface side heat insulation Material 340 Underside insulation

Claims (4)

A substantially cylindrical hot water storage can body for storing hot water, and a foam heat insulating material disposed so as to cover the periphery of the hot water storage can body, a front side heat insulating material constituting the front side, and a rear side heat insulating material constituting the rear side And a substantially rectangular housing that houses the hot water storage can body and the foam heat insulating material, and the front side heat insulating material and the rear surface heat insulating material form side portions of the substantially square shaped housing. A configuration in which an inclined plane portion that forms a space and an inclined plane portion that forms a space is provided, and a joint portion of the inclined plane portion is located at a position facing the plane portion that forms the side portion of the substantially rectangular housing. A hot water supply device characterized by that. The foam heat insulating material includes a front surface side heat insulating material constituting the front surface side, a rear surface side heat insulating material constituting the rear surface side, a top surface side heat insulating material constituting the top surface side, and a lower surface side heat insulating material constituting the lower surface side. A flat plane portion having an inclined shape is formed at a joint portion where the front surface side heat insulating material, the rear surface side heat insulating material, the top surface side heat insulating material, and the lower surface side heat insulating material are bonded. The hot water supply apparatus according to claim 1 . The hot water storage device according to claim 1 or 2 , wherein the hot water storage can has leg portions, and a positioning portion for positioning the leg portions is provided on the front surface side heat insulating material and / or the rear surface side heat insulating material. The hot water supply device according to any one of claims 1 to 3 , wherein an extrusion pin is provided so as to avoid an inclined flat portion on the front surface side heat insulating material and / or the rear surface side heat insulating material.

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