JP4890103B2 - Hot water storage water heater - Google Patents

Description

  The present invention relates to a hot water storage type hot water supply apparatus having a hot water storage tank for storing hot water.

  Hot water storage hot water heaters such as heat pump water heaters and electric water heaters are used to store hot water obtained by heating water with a heat source such as a heat pump or heater in a hot water storage tank, and the end of a hot water pipe connected to the hot water storage tank. The hot water in the hot water storage tank is discharged when the user opens the water faucet arranged in the hot water tank. Since the time from the generation of hot water by the heat source to the hot water is indefinite, the hot water storage type water heater surrounds the hot water storage tank with a heat insulating material to suppress the temperature drop of the hot water in the hot water storage tank. In order to improve the heat retaining property of the hot water storage tank by the heat insulating material, it is important to make the heat insulating materials in close contact with each other and to make the heat insulating material and the hot water storage tank in close contact with each other. For this reason, various ideas have been elaborated about the heat insulation structure of the hot water storage type water heater.

  For example, in order to achieve close contact between the heat insulating material and the hot water storage tank, the heat insulating material is wrapped around the hot water storage tank, or when the hot water storage tank is surrounded by a plurality of heat insulating materials, the heat insulating material is fixed to each other with an adhesive tape, etc. Although there is a method of achieving close contact between the materials and close contact between the heat insulating material and the hot water storage tank, the hot water storage tanks described in Patent Document 1 and Patent Document 2 are known as higher workability.

  The hot water storage tanks described in Patent Documents 1 and 2 are provided with a predetermined fitting portion, that is, an uneven portion in which the adjacently arranged ones are fitted to each of a plurality of heat insulating materials surrounding the hot water storage tank. In addition, by providing the above-described uneven portions on each heat insulating material, the workability when these heat insulating materials are brought into close contact with each other and disposed around the hot water storage tank is improved. Moreover, the outer periphery of the heat insulating material described in Patent Documents 1 and 2 is partially thinned, and in the hot water storage tanks described in these Patent Documents 1 and 2, a portion that is not thinned in the heat insulating material is The heat insulating material is pressed against the hot water storage tank by placing the heat insulating material and the external case so as to be in contact with the inner surface of the outer case (hot water storage tank outer body), and the heat insulating material and the hot water storage tank are in close contact with each other. .

JP 2002-310511 A JP 2002-357364 A

  However, in many cases, the outer case of the hot water storage tank is made of a relatively thin sheet metal in order to reduce the cost. Therefore, when the outer case is arranged so that the inner surface thereof is partially in contact with the heat insulating material and the heat insulating material is pressed against the hot water storage tank, the region of the outer case that contacts the heat insulating material and its periphery Is distorted outward and the appearance is likely to be impaired. On the other hand, if the contact pressure between the heat insulating material and the outer case is set to such a level that the appearance of the outer case is not impaired, it becomes difficult to sufficiently improve the adhesion between the heat insulating material and the hot water storage tank, and the heat retention is improved. It tends to be difficult.

  Of course, if the entire outer peripheral surface of the heat insulating material is in contact with the inner surface of the outer case without removing the heat insulating material, the heat insulating material is pressed against the hot water storage tank without impairing the outer appearance of the outer case, thereby improving the adhesion between the two. Although it becomes easy to raise, when the contact area of an exterior case and a heat insulating material becomes large, the heat dissipation from both contact parts will increase and the heat retention performance by a heat insulating material will deteriorate.

  The present invention has been made in view of the above, and an object of the present invention is to obtain a hot water storage type hot water heater that can easily improve heat retention without impairing the appearance of the exterior case.

  A hot water storage type water heater of the present invention that achieves the above object is a hot water storage type having a hot water storage tank for storing hot water, a plurality of heat insulating materials surrounding the hot water storage tank, and an exterior case for storing the hot water storage tank and the heat insulating material. In the water heater, the outer case has a plurality of convex portions on its inner surface for pressing the heat insulating material against the hot water storage tank.

  In the hot water storage type water heater of the present invention, since the above-mentioned convex part is provided in the exterior case, relatively high rigidity can be obtained even when the exterior case is made relatively thin. For this reason, even if the outer case is pressed against the heat insulating material and arranged so that the heat insulating material is pressed against the hot water storage tank by the convex portion and the adjacent heat insulating materials are in close contact with each other. The appearance of the outer case is hardly damaged. Furthermore, since the outer case and the heat insulating material are in contact with each other at the above-described convex portion, it is easy to reduce the contact area between the outer case and the heat insulating material.

  As a result of these, even when the outer case is made relatively thin, the heat insulating materials are brought into close contact with each other without impairing the appearance of the outer case, and the heat insulating material and the hot water storage tank are brought into close contact with each other. It becomes easy to suppress the heat radiation from the contact portion. Therefore, according to the present invention, it becomes easy to improve the heat retaining property without deteriorating the appearance of the outer case of the hot water storage type hot water heater, and as a result, the hot water type hot water heater having good heat retaining property and good appearance can be obtained at low cost. It becomes easier to obtain below.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a hot water storage type water heater of the present invention will be described in detail with reference to the drawings. The present invention is not limited to the embodiments described below.

FIG. 1 is a perspective view schematically showing an example of a hot water storage type water heater of the present invention. A hot water storage type water heater 30 shown in the figure includes a heat pump heat source device 1 using carbon dioxide or the like as a refrigerant, and a hot water storage tank unit 20. The hot water storage tank unit 20 includes a hot water storage tank (not shown in FIG. 1), a plurality of heat insulating materials (not shown in FIG. 1) surrounding the hot water storage tank, and various control components not shown. And a piping component and an exterior case 17 storing them, and a total of four convex portions S _{1 to} S ₄ are provided on the inner surface of the exterior case 17. However, in FIG. 1, the back surfaces of the _two convex portions S _{1 to} S ₂ out of the _four convex portions S _{1 to} S ₄ appear.

  The hot water storage tank unit 20 is connected to the first water supply pipe 3, the second water supply pipe 4, the first hot water supply pipe 5, and the second hot water supply pipe 6, and one end of the second hot water supply pipe 6. Is provided with a hot water tap 7. The first water supply pipe 3 is connected to the lower part of the hot water storage tank and supplies non-heated water to the hot water storage tank. The non-heated water supplied to the hot water storage tank is supplied with a heat pump heat source by the second water supply pipe 4. It is supplied to the vessel 1 and heated here to become hot water. This hot water is sent to the hot water storage tank through the first hot water supply pipe 5, and is supplied into the hot water storage tank from above. The second hot water supply pipe 6 is connected to the upper part of the hot water storage tank, and the hot water stored in the hot water storage tank is discharged from the second hot water supply pipe 6 when the user opens the hot water tap 7.

  FIG. 2 is an exploded perspective view schematically showing the hot water storage tank unit 20 shown in FIG. As shown in the figure, the hot water storage tank 11 is housed in a substantially central portion of the hot water storage tank unit 20, and a first water supply pipe 3 and a second water supply pipe 4 (not shown) are shown below the hot water storage tank 11. One end of each of the first hot water supply pipe 5 and the second hot water supply pipe 6 (see FIG. 1) (not shown) is connected to the upper end. A plurality of tank support legs 13 are attached to the lower part of the hot water storage tank 11.

  Further, around the hot water storage tank 11, four heat insulating materials 15a to 15d, that is, the right outer peripheral surface of the hot water storage tank 11 (meaning the outer peripheral surface of the right half of the hot water storage tank 11 when the hot water storage tank unit 20 is viewed from the front). ) And the left outer peripheral heat insulating material 15a in contact with the left outer peripheral surface of the hot water storage tank 11 (meaning the outer peripheral surface of the left half of the hot water storage tank 11 when the hot water storage tank unit 20 is viewed from the front). 15 b, an upper heat insulating material 15 c in contact with the upper surface of the hot water storage tank 11, and a lower heat insulating material 15 d in contact with the lower surface of the hot water storage tank 11 are arranged.

  Among these heat insulating materials 15a to 15d, each of the right outer peripheral heat insulating material 15a and the left outer peripheral heat insulating material 15b corresponds to the surface shape of the hot water storage tank 11 at the place where these heat insulating materials 15a and 15b are arranged. The upper heat insulating material 15c has an inner peripheral surface shape, and each of the hot water storage tank 11, the first hot water supply pipe 5, and the second hot water supply pipe 6 (see FIG. 1) at a place where the upper heat insulating material 15c is disposed. It has an inner peripheral surface shape corresponding to the surface shape. And the lower heat insulating material 15d is the inner peripheral surface corresponding to each surface shape of the hot water storage tank 11, the 1st water supply pipe 3, and the 2nd water supply pipe 4 (refer FIG. 1) in the location where this lower heat insulating material 15d is arrange | positioned. It has a shape.

  The heat insulating materials 15 a to 15 b are pressed against the hot water storage tank 11 by the external case 17 in a state where they are accommodated in the external case 17, and adjacent ones are in close contact with each other to surround the hot water storage tank 11. Various materials can be used for the individual heat insulating materials 15a to 15d. However, in order to reduce the manufacturing cost of the hot water storage type water heater 30, these heat insulating materials 15a to 15d are made of, for example, heat-resistant foamed polystyrene. It is preferable.

  The outer case 17 that accommodates the hot water storage tank 11 and the heat insulating materials 15a to 15d described above has six casing materials, that is, the right side casing material 17a that forms the right side surface of the outer case 17, and the left side casing that forms the left side surface. It comprises a material 17b, a front casing material 17c that forms the front surface, a rear casing material 17d that forms the back surface, an upper casing material 17e that forms the upper surface, and a lower casing material 17f that forms the lower surface. Adjacent ones of these casing members 17a to 17f are fixed to each other by a fixing tool such as a screw to form the outer case 17. A plurality of support legs 19 that support the entire hot water storage tank unit 20 are attached to the lower surface of the lower casing material 17f.

Of the six casing materials 17a to 17f, the right casing material 17a includes two convex portions S ₁ and S ₂ (in FIG. 2, the rear surfaces of these convex portions S ₁ and S ₂ appear). The left casing material 17b has two convex portions S ₃ and S ₄ on the inner surface. These convex portions S _{1 to} S ₄ are all integrally formed when the right casing member 17a or the left casing member 17b is made from a relatively thin sheet metal, and extend in the horizontal direction. It is a scale-like convex part (a convex part formed in a straight or straight strip shape). The convex portions S ₁ and S ₂ are arranged side by side, and the convex portions S ₃ and S ₄ are also arranged side by side.

3 is a vertical sectional view partially showing the hot water storage tank unit 20 shown in FIG. 2, and FIG. 4 is a schematic view showing a part of FIG. 3 in an enlarged manner. As shown in FIG. 3, the right casing material 17 a is applied to another predetermined casing material in a state where the convex portion S ₁ provided on the right casing material 17 a is pressed against the right outer peripheral insulating material 15 a. The outer case 17 (see FIGS. 1 and 2) is formed by being fixed. Further, the left casing member 17b is fixed to the other predetermined casing member in a state where the convex portion S ₃ provided in the left side casing member 17b is pressed against the left outer periphery heat insulating material 15b, the outer A case 17 is formed. Although not shown in FIG. 3, the convex portion S ₂ (see FIG. 2) provided on the right casing material 17a is pressed against the right outer peripheral insulating material 15a and provided on the left casing material 17b. The convex portion S ₄ (see FIG. 1) is pressed against the left outer peripheral heat insulating material 15b.

As shown in FIG. 3 and FIG. 4, the convex portion S ₁ is formed by drawing a sheet metal that is the base of the right casing material 17 a. Similarly, each of the convex portions S ₂ , S ₃ , S ₄ (see FIG. 2) is also formed by drawing.

In the hot water storage water heater 30 (see FIG. 1) having the hot water storage tank unit 20 configured in this way, the right outer peripheral heat insulating material 15a and the left outer peripheral heat insulating material 15b are respectively the right side casing material 17a or the left side casing material 17b. Therefore, the two heat insulating materials 15a and 15b, the upper heat insulating material 15c, and the lower heat insulating material 15d described above can easily obtain high heat retaining performance. Further, even when the right casing member 17a and the left casing member 17b are made of relatively thin sheet metal, the rigidity can be made relatively high, so the right outer peripheral heat insulating material 15a or the left outer peripheral heat insulating material 15b. When the convex portions S _{1 to} S ₄ are pressed against the convex portions S _{1 to} S ₄ , it is difficult for distortion to occur around the convex portions S _{1 to} S ₄ .

Therefore, in the hot water storage type hot water heater 30, it is easy to improve the heat retaining property without deteriorating the appearance of the outer case 17. Further, since each of the convex portions S _{1 to} S _{4 is} a long convex portion extending in the horizontal direction, the vertical convection generated in the air around the hot water storage tank 11 due to the temperature distribution in the hot water storage tank 11. Can be blocked by each of the convex portions S _{1 to} S _{4, and} the heat retaining performance is improved also from this point. And since the comparatively thin sheet metal can be used when producing the exterior case 17, the manufacturing cost is easy to hold down. Furthermore, due to the relatively high rigidity of each of the right side casing material 17a and the left side casing material 17b, the transportability of the casing materials 17a, 17b at the manufacturing site, the workability when assembling the exterior case 17, etc. Will also be good.

As mentioned above, although embodiment of the hot water storage type water heater of this invention was explained in full detail, this invention is not limited to embodiment mentioned above. For example, it is possible to appropriately select how many insulating materials the hot water storage tank is surrounded by. In addition, heat insulating members are arranged before and after the hot water tank (front and rear of the hot water tank when the hot water tank unit is viewed from the front) and above and below, respectively, and the hot water tank is surrounded by these heat insulating members. can also configure the exterior case in the casing material, in this case, for example, similar to the convex portion and the convex portion S ₁ to S ₄ described above on each of the front casing member and the rear casing member is provided.

Of course, each of the upper casing material and the lower casing material can be provided with convex portions similar to the convex portions S _{1 to} S ₄ described above. In this case, each of the upper heat insulating material and the lower heat insulating member, the hot water storage tank, And the rigidity of the upper casing material and the lower casing are improved. Providing the same convex portions as the convex portions S _{1 to} S ₄ described above in each casing material constituting the outer case further improves the adhesion between each of the heat insulating members and the hot water storage tank and the heat insulating members. A hot water storage type water heater can be obtained easily.

  The shape and number of protrusions provided on each casing material can be selected as appropriate in consideration of the influence of the contact area with the heat insulating material on the heat insulation performance of the hot water storage type water heater, the rigidity required for the exterior case, etc. . The number of hot water storage tanks in the hot water storage tank unit can be set to a desired number of 1 or more. The larger the number of hot water storage tanks, the larger the outer case and the larger the area of each casing material. Rigidity is required.

  The overall shape of each convex portion may be a long shape (straight or straight strip) extending in the vertical direction, a ring shape, a rectangle, or the like. Further, the method for forming the convex portion is not limited to the drawing process. For example, the convex portion is formed by attaching a part prepared as a separate part from the casing material to a predetermined portion of the casing material with an adhesive or a process tool. Casing material can also be obtained. Furthermore, the casing material can be a resin molded product, and in this case, the convex portion may be integrally formed when the casing material is molded.

  The heat source device constituting the hot water storage type water heater of the present invention may be other than a heat pump type, for example, a heater or the like disposed in a hot water storage tank. If it is a hot water storage type water heater, the kind of heat source is not ask | required. Moreover, the number of hot water storage tanks can also be made into the desired number of 1 or more. The hot water storage type water heater of the present invention can be variously modified, modified, combined, etc. in addition to those described above.

1 is a perspective view schematically showing an example of a hot water storage type water heater of the present invention. It is a disassembled perspective view which shows schematically the hot water storage tank unit shown in FIG. FIG. 3 is a vertical sectional view partially showing the hot water storage tank unit shown in FIG. 2. It is the schematic which expands and shows a part of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat pump type heat source 11 Hot water storage tank 15a Right outer peripheral heat insulating material 15b Left outer peripheral heat insulating material 15c Upper heat insulating material 15d Lower heat insulating material 17 Exterior case 17a Right side casing material 17b Left side casing material 17c Front casing material 17d Rear casing material 17e upper casing member 17f lower casing member 20 hot water storage tank unit 30 hot water storage type water heater S ₁ to S ₄ protrusions

Claims (5)

A hot water storage water heater having a hot water storage tank for storing hot water, a plurality of heat insulating materials surrounding the hot water storage tank, and an exterior case for storing the hot water storage tank and the heat insulating material,
The outer case may have a plurality of protrusions for pressing the insulation material to the hot water storage tank on its inner surface,
Each of the plurality of convex portions extends in the horizontal direction .   The outer case includes a casing member that forms left and right side surfaces of the outer case, a casing member that forms front and rear side surfaces, and a casing member that forms upper and lower surfaces, the left and right side surfaces, The hot water storage type water heater according to claim 1, wherein the convex portion is provided on a casing member that forms a side surface or the upper and lower surfaces.   The hot water storage type hot water heater according to claim 1 or 2, wherein the plurality of convex portions include at least two long convex portions arranged in parallel to each other.   The hot water storage type water heater according to any one of claims 1 to 3, wherein the plurality of convex portions includes a convex portion having an annular shape as a whole.   The hot water storage type hot water supply device according to any one of claims 1 to 3, wherein the plurality of convex portions include a convex portion formed in a horizontal direction in an overall shape.

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