JP5887828B2 - Hot water storage type water heater and manufacturing method of molded heat insulating material - Google Patents

Description

  The present invention relates to a hot water storage type hot water heater and a method for manufacturing a molded heat insulating material.

  There are a wide range of hot water storage water heaters configured to store hot water obtained by heating water with a heat source such as a heat pump unit in a hot water storage tank, take out hot water from this hot water storage tank when necessary, and supply it to a hot water supply terminal It is used. In order to suppress heat dissipation loss from the hot water storage tank, a heat insulating material is disposed around the hot water storage tank. As the heat insulating material, for example, a foamed heat insulating material such as expanded polystyrene has been used conventionally, but in order to further improve the heat insulation performance of the hot water storage tank, a technique using a vacuum heat insulating material with higher heat insulating performance has been proposed. Yes. The vacuum insulation material is a vacuum state in which a core material (core material) formed by processing foam, powder, fiber, etc. into a sheet is wrapped in a gas barrier film (plastic film, plastic metal laminate film, etc.). And the peripheral part of the gas barrier film is heat sealed and sealed. The vacuum heat insulating material has an extremely high heat insulating performance, but when the gas barrier film is perforated and the internal vacuum state is impaired, the heat insulating performance is greatly deteriorated. Thus, since a vacuum heat insulating material is easy to be damaged, there exists a problem that handling at the time of manufacture, conveyance, the assembly to a hot water storage tank unit, etc. is difficult.

  In order to solve this problem, a technique has been proposed in which a vacuum heat insulating material is integrally formed with a foamable heat insulating material, and the vacuum heat insulating material is incorporated in the foamable heat insulating material (see, for example, Patent Document 1).

JP 2007-131329 A

  However, in the above-mentioned conventional technology, even if the vacuum heat insulating material is broken during insert molding of the vacuum heat insulating material into the foamable heat insulating material, during transportation, or when assembled in the hot water storage tank unit, Unable to find that damage. For this reason, the breakage of the vacuum heat insulating material is overlooked, and there is a possibility that the hot water storage type hot water heater in which the heat insulation performance of the hot water storage tank is greatly reduced due to the deterioration of the heat insulating performance of the vacuum heat insulating material will be shipped as a product.

  The present invention has been made in order to solve the above-described problems, and is capable of easily confirming whether or not the vacuum heat insulating material incorporated in the molded heat insulating material for insulating the hot water storage tank is damaged. An object of the present invention is to provide a water heater and a method for producing a molded heat insulating material thereof.

A hot water storage type hot water heater according to the present invention is a hot water storage type hot water heater comprising a hot water storage tank, a molded heat insulating material covering the outside of the hot water storage tank, and a vacuum heat insulating material incorporated in the molded heat insulating material. The material has a confirmation part that exposes a part of the built-in vacuum heat insulating material, and a part of the vacuum heat insulating material can be visually observed from the confirmation part. Is provided on the inner surface side of the molded heat insulating material which is the inner side.
Further, a hot water storage type hot water heater according to the present invention is a hot water storage type hot water heater provided with a hot water storage tank, a molded heat insulating material covering the outside of the hot water storage tank, and a vacuum heat insulating material built in the molded heat insulating material, The molded insulation has a confirmation part that exposes a part of the built-in vacuum insulation, and a part of the vacuum insulation is visible from the confirmation part, and the confirmation part attaches the molded insulation to the hot water storage tank. When the molded heat insulating material is attached to the hot water storage tank, it is provided on both the inner surface side of the molded heat insulating material which is the inner side and the outer surface side of the molded heat insulating material which is the outer side.
Further, a hot water storage type hot water heater according to the present invention is a hot water storage type hot water heater provided with a hot water storage tank, a molded heat insulating material covering the outside of the hot water storage tank, and a vacuum heat insulating material built in the molded heat insulating material, The molded insulation has a confirmation part that exposes a part of the built-in vacuum insulation, and a part of the vacuum insulation is visible from the confirmation part, and when the vacuum insulation is damaged, the vacuum insulation A part having a lower mechanical strength than the other part of the molded heat insulating material is provided around the confirmation part of the molded heat insulating material so that the molded heat insulating material around the confirmed part is deformed by the expansion of There is .
Also, a manufacturing method of forming heat-insulating material according to the present invention, when producing shaped heat-insulating material of the hot-water storage type water heater, the vacuum heat insulating material was placed in a mold, which supports the vacuum heat insulating material in the mold Molding is performed by arranging the support means at a position corresponding to the confirmation portion.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to confirm easily the presence or absence of the damage of the vacuum heat insulating material incorporated in the shaping | molding heat insulating material for heat-insulating a hot water storage tank.

It is a block diagram which shows the hot water storage type water heater of Embodiment 1 of this invention. It is sectional drawing of the hot water storage tank unit of the hot water storage type water heater of Embodiment 1 of this invention. It is a disassembled perspective view which shows the hot water storage tank of the hot water storage type water heater of Embodiment 1 of this invention, and the shaping | molding heat insulating material which covers this. It is a perspective view which shows the shaping | molding heat insulating material of the hot water storage type water heater of Embodiment 1 of this invention. It is the figure which looked at the shaping | molding heat insulating material of the hot water storage type water heater of Embodiment 1 of this invention from the inner peripheral surface side. It is the sectional view on the AA line in FIG. It is a perspective view which shows the shaping | molding heat insulating material in the hot water storage type water heater of Embodiment 2 of this invention. It is a side view which shows the hot water storage tank unit 30 of the state which removed the outer case side surface and outer case top plate in the hot water storage type water heater of Embodiment 3 of this invention.

  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 configuration diagram illustrating a hot water storage type water heater according to Embodiment 1 of the present invention. As shown in FIG. 1, the hot water storage type water heater of this embodiment includes a hot water storage tank unit 30 and a heating means 4. The outer case of the hot water storage tank unit 30 accommodates a substantially cylindrical hot water storage tank 1 and various devices such as pumps, valves, and a heat exchanger for reheating. The hot water storage tank 1 is covered with a heat insulating material to be described later in order to prevent heat dissipation to the atmosphere. A plurality of tank unit legs 12 are installed below the outer case, and the hot water storage tank unit 30 is supported and fixed to the ground or a pedestal by these tank unit legs 12.

  Water is supplied to the hot water storage tank 1 through a water supply pipe 2. The water in the hot water storage tank 1 is transported to the heating means 4 through the incoming water pipe 3 connected to the lower part of the hot water storage tank 1. The heating means 4 is comprised with the heat pump unit which heats water using a refrigerating cycle, for example. The water conveyed to the heating means 4 is heated by the heating means 4 and becomes hot water. The hot water is conveyed to the hot water storage tank 1 and stored in the hot water storage tank 1 through a hot water discharge pipe 5 that connects the heating means 4 and the upper part of the hot water storage tank 1. Hot water stored in the hot water storage tank 1 is supplied to a bath tub 40 through a bath hot water supply pipe 6 or to a hot water supply terminal such as a shower, a kitchen, and a bathroom faucet through the hot water supply pipe 7. Supplied.

  The hot water storage type water heater of the present invention is not limited to the above-described configuration, and may be one in which heating means such as an electric heater is disposed in the hot water storage tank 1, for example.

  FIG. 2 is a cross-sectional view showing a hot water storage tank unit 30 of the hot water storage type water heater according to Embodiment 1 of the present invention. FIG. 3 is an exploded perspective view showing a hot water storage tank 1 of the hot water storage type hot water supply apparatus according to Embodiment 1 of the present invention and a molded heat insulating material covering the hot water storage tank 1. FIG. 4 is a perspective view showing a molded heat insulating material of the hot water storage type water heater according to Embodiment 1 of the present invention. FIG. 5 is a view of the molded heat insulating material of the hot water storage type water heater according to Embodiment 1 of the present invention as viewed from the inner peripheral surface side. 6 is a cross-sectional view taken along line AA in FIG.

  As shown in FIG. 2, the hot water storage tank 1 is covered with molded heat insulating materials 14, 15, 16, and 17 that are molded into a predetermined shape. These molded heat insulating materials 14, 15, 16, and 17 are desirably foamed molded heat insulating materials made of, for example, expanded polystyrene. The outer case is constituted by the bottom plate 9, the outer case side surface 10, the outer case top plate 11 and the like arranged so as to surround the hot water storage tank 1 covered with these molded heat insulating materials 14, 15, 16 and 17. The hot water storage tank 1 is supported on the bottom plate 9 by a plurality of tank legs 8. A plurality of tank unit legs 12 are installed below the bottom plate 9.

  The molded heat insulating material 14 has a substantially bowl-like shape covering the upper part of the hot water storage tank 1. The molded heat insulating material 15 has a substantially bowl-like shape covering the lower part of the hot water storage tank 1. As shown in FIG. 3, the molded heat insulating materials 16 and 17 each have a substantially semi-cylindrical shape. By combining both, the body (side surface) of the hot water storage tank 1 extends over the entire circumference. Covered. In addition, since the shaping | molding heat insulating materials 16 and 17 in this embodiment are the mutually substantially the same structure, in FIG. 4 thru | or FIG. 6, only one of the shaping | molding heat insulating materials 16 and 17 is shown.

  A vacuum heat insulating material 13 is built in each of the molded heat insulating materials 16 and 17. That is, the vacuum heat insulating material 13 is integrated with the molded heat insulating materials 16 and 17, and most of the surface of the vacuum heat insulating material 13 is covered with the molded heat insulating materials 16 and 17. The vacuum heat insulating material 13 is formed by, for example, wrapping a core material (core material) formed by processing foam, powder, fiber, or the like into a sheet shape with a gas barrier film (plastic film, plastic metal laminate film, etc.). A vacuum state (reduced pressure state) is employed, and the peripheral portion of the gas barrier film is heat-sealed and sealed. For this reason, the vacuum heat insulating material 13 has a configuration in which a welded film portion formed by thermally welding a gas barrier film protrudes from an outer peripheral portion of a main body portion containing a core material.

  As shown in FIG. 4, the vacuum heat insulating material 13 is built in the molded heat insulating materials 16 and 17 in a state of a curved surface (substantially semi-cylindrical) along the cylindrical surface of the molded heat insulating materials 16 and 17. . In the illustrated configuration, one vacuum heat insulating material 13 is built in each of the molded heat insulating materials 16 and 17, but a plurality of vacuum heat insulating materials may be built in one molded heat insulating material. In that case, a plurality of vacuum heat insulating materials may be stacked, or a plurality of vacuum heat insulating materials may be arranged in divided regions. As a method of manufacturing the molded heat insulating materials 16 and 17 including the vacuum heat insulating material 13, the vacuum heat insulating material 13 is arranged in a mold for forming the molded heat insulating materials 16 and 17 so as to surround the vacuum heat insulating material 13. The molded heat insulating materials 16 and 17 can be easily manufactured by integrally molding, that is, by insert molding.

  Generally, the heat insulation performance of the vacuum heat insulating material is greatly reduced when a hole is opened in the gas barrier film and the internal vacuum state is impaired. For this reason, when manufacturing, transporting, and assembling, it is necessary to pay close attention so as not to damage the gas barrier film and make a hole, and handling is difficult. On the other hand, in this embodiment, since the vacuum heat insulating material 13 is built in the molded heat insulating materials 16 and 17, the vacuum heat insulating material 13 is protected by the molded heat insulating materials 16 and 17. It is possible to surely prevent the gas barrier film of the vacuum heat insulating material 13 from being damaged by mistake during the transportation after assembling 17 or the assembly into the hot water storage tank unit 30. Moreover, the assembly work of the hot water storage tank unit 30 is also facilitated.

  As shown in FIGS. 2 to 6, the formed heat insulating materials 16 and 17 are provided with holes 18 b and 18 c as confirmation portions for exposing a part of the built-in vacuum heat insulating material 13. The hole 18b is provided on the inner peripheral surface side of the molded heat insulating materials 16 and 17 that are inside when the molded heat insulating materials 16 and 17 are attached to the hot water storage tank 1. The hole 18c is provided on the outer peripheral surface side of the molded heat insulating materials 16 and 17 which are outside when the molded heat insulating materials 16 and 17 are attached to the hot water storage tank 1. The holes 18b and 18c have a shape in which the wall surfaces of the molded heat insulating materials 16 and 17 covering the vacuum heat insulating material 13 are cut out in a window shape. In the illustrated configuration, the holes 18b and 18c are rectangular, but the shape is not limited to this, and may be, for example, a circle, an ellipse, or a triangle.

  In the present embodiment, a partial region of the vacuum heat insulating material 13 can be visually observed from the outside of the molded heat insulating materials 16 and 17 through the holes 18b and 18c. When the gas barrier film of the vacuum heat insulating material 13 is damaged and the internal vacuum state is impaired, the compressive force due to the atmospheric pressure acting on the core material is lost, so that the vacuum heat insulating material 13 is Inflate. For this reason, whether or not the vacuum heat insulating material 13 is damaged can be easily and surely confirmed by visually confirming whether or not the vacuum heat insulating material 13 is expanded from the holes 18b and 18c. As described above, the vacuum heat insulating material 13 is covered and protected by the molded heat insulating materials 16 and 17, but the vacuum heat insulating material 13 may be damaged when the molded heat insulating materials 16 and 17 are formed. Moreover, the vacuum heat insulating material 13 may be damaged for some reason during transportation and assembly. According to the present embodiment, if the vacuum heat insulating material 13 is damaged, whether the vacuum heat insulating material 13 has expanded from the holes 18b and 18c after the forming heat insulating materials 16 and 17 are formed, during transportation, and during assembly. By visually confirming the above, it is possible to easily find the vacuum breakage of the vacuum heat insulating material 13. Thereby, it can suppress reliably that the failure | damage of the vacuum heat insulating material 13 is overlooked and the product in which the heat insulation (thermal insulation performance) of the hot water storage tank 1 fell is shipped.

  The size (area) of the confirmation portion such as the holes 18b and 18c is not particularly limited, but has a size that allows the visual confirmation of the expansion of the vacuum heat insulating material 13 when the vacuum heat insulating material 13 is damaged. It is desirable. Further, in order to avoid damage to the vacuum heat insulating material 13 due to something inadvertently contacting with the vacuum heat insulating material 13 exposed from the holes 18b, 18c during transportation or assembly, the hole 18b, It is desirable that the size (area) of the confirmation part such as 18c is not larger than necessary. In addition, it is desirable that the vacuum heat insulating material 13 is covered with the molded heat insulating materials 16 and 17 and not exposed to the outside in places other than the confirmation portions such as the hole portions 18b and 18c.

  In the configuration shown in the figure, the confirmation portions (the hole portion 18b on the inner peripheral surface side and the hole portion 18c on the outer peripheral surface side) are provided on both the inner peripheral surface side and the outer peripheral surface side of the molded heat insulating materials 16 and 17, Regardless of the orientation when the molded heat insulating materials 16 and 17 are stored as parts, it is possible to easily confirm whether or not the vacuum heat insulating material 13 is damaged. Further, it is possible to confirm whether or not the vacuum heat insulating material 13 is damaged even after assembly (after being mounted on the hot water storage tank 1).

  However, the confirmation part may be provided only on one of the inner peripheral surface side and the outer peripheral surface side of the molded heat insulating materials 16 and 17. When the confirmation part (hole 18b) is provided only on the inner peripheral surface side of the molded heat insulating materials 16 and 17, the vacuum heat insulating material 13 exposed from the hole 18b after assembly (after mounting in the hot water storage tank 1). In addition, the possibility of damaging the vacuum heat insulating material 13 due to interference of other components or the like can be eliminated, so that the vacuum heat insulating material 13 can be more reliably protected. On the other hand, when the confirmation part (hole 18c) is provided only on the outer peripheral surface side of the molded heat insulating materials 16 and 17, the vacuum heat insulating material 13 is damaged even after assembly (after being mounted on the hot water storage tank 1). There is an advantage that the presence or absence can be confirmed.

  Moreover, in this embodiment, since the confirmation part was comprised by the window-shaped hole parts 18b and 18c, only the one part area | region very small with respect to the magnitude | size of the vacuum heat insulating material 13 is exposed from the hole parts 18b and 18c. Therefore, it can be easily taken care that nothing touches the vacuum heat insulating material 13 exposed from the holes 18b and 18c during transportation or assembly. For this reason, it can suppress more reliably that the vacuum heat insulating material 13 is damaged carelessly.

  In the present embodiment, as shown in FIGS. 3 and 5, the holes 18b and 18c are provided at a plurality of locations (in the illustrated configuration, at intervals along the circumferential direction of the molded heat insulating materials 16 and 17, respectively). 3 places). For this reason, it is possible to more easily and reliably confirm whether or not the vacuum heat insulating material 13 is damaged.

  Further, as shown in FIG. 3, a sealing member 19 is prepared for closing the hole 18c as a defective portion of the molded heat insulating materials 16 and 17, and after assembly (after mounting on the hot water storage tank 1) or before assembly. After confirming that the vacuum heat insulating material 13 is not damaged, the sealing member 19 may be attached to the hole 18c. Thereby, after the sealing member 19 is mounted, the vacuum heat insulating material 13 is not exposed from the hole 18c, so that there is no possibility of damaging the vacuum heat insulating material 13 due to interference with other parts, and the vacuum heat insulating material. 13 can be protected more reliably. Moreover, the heat insulation performance of the hot water storage tank 1 can be improved by closing the missing portions of the molded heat insulating materials 16 and 17. The sealing member 19 is preferably made of a material having heat insulation properties, and more preferably made of the same material as the molded heat insulating materials 16 and 17. Moreover, it is preferable that the sealing member 19 is formed in a shape corresponding to the hole 18c and can be fixed by being press-fitted into the hole 18c. In FIG. 3, only the sealing member 19 for the central hole 18c is shown, and the sealing member 19 for the remaining hole 18c is omitted. Moreover, you may make it mount | wear with the same sealing member also in the hole 18b by the side of the internal peripheral surface of the shaping | molding heat insulating materials 16 and 17. FIG.

  Moreover, when the vacuum heat insulating material 13 is damaged by adjusting the mechanical strength of the molded heat insulating materials 16 and 17 around the hole portions 18b and 18c, the hole portions 18b and 18c are accompanied by the expansion of the vacuum heat insulating material 13. You may comprise so that the shaping | molding heat insulating materials 16 and 17 of the periphery of may deform | transform (expand). For example, the molded heat insulating materials 16 and 17 around the holes 18b and 18c are provided with portions thinner than the other portions, hollow portions, or tapered toward the holes 18b and 18c. By providing a structure that weakens the mechanical strength such as reducing the thickness, the molded heat insulating materials 16 and 17 around the holes 18b and 18c are deformed (expanded) when the vacuum heat insulating material 13 is damaged or expanded. It can be constituted as follows. According to such a configuration, when the vacuum heat insulating material 13 is broken, the breakage can be found more easily and reliably.

  Moreover, you may make it provide the mark (marking etc.) which displays the position of a confirmation part on the shaping | molding heat insulating materials 16 and 17 of the periphery of confirmation parts like the hole parts 18b and 18c. This makes it possible to more easily check whether the vacuum heat insulating material 13 is damaged.

  The molded heat insulating materials 16 and 17 can be manufactured by insert molding as described above, but when the insert molding is performed, the vacuum heat insulating material 13 is disposed in the mold and the vacuum heat insulating material 13 is supported in the mold. There is a need to. In that case, it is preferable to perform molding by arranging support means for supporting the vacuum heat insulating material 13 in the mold at positions corresponding to the hole portions 18b and 18c (confirmation portions). Since it is not necessary to pour the molding material, which is the material of the molding heat insulating materials 16 and 17, into the positions corresponding to the holes 18b and 18c (confirmation unit), the support means can be easily arranged. By performing the molding in this manner, the vacuum heat insulating material 13 can be easily held in the mold, and the manufacturing (molding) property is improved. In the present embodiment, since the holes 18b and 18c are provided at a plurality of locations (three locations in the illustrated configuration) at intervals along the circumferential direction of the molded heat insulating materials 16 and 17, the support means is also provided. The vacuum heat insulating material 13 can be held at a plurality of locations along the circumferential direction. For this reason, holding | maintenance of the vacuum heat insulating material 13 in a metal mold | die becomes still easier.

Embodiment 2. FIG.
Next, a second embodiment of the present invention will be described with reference to FIG. 7. The description will focus on the differences from the first embodiment described above, and the same or corresponding parts will be denoted by the same reference numerals. Is omitted.

  FIG. 7 is a perspective view showing the molded heat insulating material 16 in the hot water storage type water heater according to the second embodiment of the present invention. As shown in FIG. 7, in the molded heat insulating material 16 of the present embodiment, instead of the holes 18b and 18c of the first embodiment, as a confirmation portion for exposing a part of the built-in vacuum heat insulating material 13, it is cut. A notch 18d is provided. The notch portion 18d is a portion formed in a shape in which a part of the upper end portion of the molded heat insulating material 16 is notched. The notches 18d are provided at a plurality of locations (three locations in the illustrated configuration) at intervals along the circumferential direction of the molded heat insulating material 16. A part of the end of the vacuum heat insulating material 13 built in the molded heat insulating material 16 is exposed from the notch 18d. The portion of the vacuum heat insulating material 13 exposed from the notch 18d includes not only a welded film portion formed by welding a gas barrier film but also a main body portion containing a core material. According to the present embodiment, in the unlikely event that the vacuum heat insulating material 13 is damaged, the presence or absence of expansion of the vacuum heat insulating material 13 is visually confirmed from the notched portion 18d after the molding heat insulating material 16 is molded, transported, or assembled. By doing so, it becomes possible to easily find the vacuum breakage of the vacuum heat insulating material 13.

  In the present embodiment, since the confirmation part is configured by the window-shaped notch 18d, the end of the vacuum heat insulating material 13 is not exposed over the entire length, but only a part of the end of the vacuum heat insulating material 13 is exposed. Since it is only exposed from the notch 18d, it can be easily taken care that something does not contact the vacuum heat insulating material 13 exposed from the notch 18d during transportation or assembly. For this reason, it can suppress more reliably that the vacuum heat insulating material 13 is damaged carelessly.

  Moreover, since the vacuum heat insulating material 13 exposed from the notch 18d is visible from both the inner peripheral surface side and the outer peripheral surface side of the molded heat insulating material 16, it is easily confirmed whether the vacuum heat insulating material 13 is damaged. Is possible. Further, it is possible to confirm whether or not the vacuum heat insulating material 13 is damaged even after assembly (after being mounted on the hot water storage tank 1). In addition, the formation part of the notch 18d is not limited to the upper end of the molded heat insulating material 16, but a similar notch is provided at the lower end of the molded heat insulating material 16 or the end along the vertical direction. Also good. Further, as described in the first embodiment, a sealing member for closing the notch portion 18d as a defective portion of the molded heat insulating material 16 was prepared, and it was confirmed that the vacuum heat insulating material 13 was not damaged. The sealing member may be attached to the notch 18d later.

Embodiment 3 FIG.
Next, a third embodiment of the present invention will be described with reference to FIG. 8. The description will focus on the differences from the first embodiment described above, and the same or corresponding parts will be denoted by the same reference numerals. Is omitted.

  FIG. 8 is a side view showing the hot water storage tank unit 30 with the outer case side surface 10 and the outer case top plate 11 removed in the hot water storage type hot water heater of Embodiment 3 of the present invention. As shown in FIG. 8, the molded heat insulating material 16 of this embodiment is provided with a hole 18e as a confirmation portion. In the molded heat insulating material 16, a vacuum heat insulating material 13a and a vacuum heat insulating material 13b are arranged side by side. A part of the vacuum heat insulating material 13a and a part of the vacuum heat insulating material 13b are exposed from the hole 18e. In addition, a gap is provided between the vacuum heat insulating material 13a and the vacuum heat insulating material 13b. For this reason, the part of the gap between the vacuum heat insulating materials 13 a and 13 b in the hole 18 e penetrates between the inner peripheral surface and the outer peripheral surface of the molded heat insulating material 16. A thermistor 21 as a temperature sensor for detecting the water temperature in the tank is attached to the surface of the hot water storage tank 1. The hole 18e is provided at a position corresponding to the attachment position of the thermistor 21. For this reason, the thermistor 21 can be visually observed through the said penetration part of the hole 18e, without removing the shaping | molding heat insulating material 16 from the hot water storage tank 1. FIG.

  According to the present embodiment, if the vacuum heat insulating materials 13a and 13b are damaged, whether or not the vacuum heat insulating materials 13a and 13b are expanded from the hole 18e after the molding heat insulating material 16 is molded, transported, or assembled. By visual confirmation, it becomes possible to easily find the vacuum breakage of the vacuum heat insulating materials 13a and 13b. Further, without removing the molded heat insulating material 16 from the hot water storage tank 1, the thermistor 21 can be inspected, or the thermistor 21 can be replaced when the thermistor 21 breaks down, through the penetrating portion of the hole 18e. .

  As another means for confirming whether or not the vacuum heat insulating material 13 is damaged, the surface temperature of the peripheral portion including the holes 18b, 18c, 18e and the notch 18d is measured with a thermoviewer or the like in a state where heat storage is required, such as hot water storage. You may implement by measuring distribution. Thereby, the presence or absence of breakage of the vacuum heat insulating material 13 can be easily confirmed from the state of the temperature difference between the hole or notch and other parts even in a state where the water heater is actually installed and used, for example. Is possible.

DESCRIPTION OF SYMBOLS 1 Hot water storage tank 2 Water supply piping 3 Water supply piping 4 Heating means 5 Hot water supply piping 6 Bath hot water supply piping 7 Hot water supply piping 8 Tank leg 9 Bottom plate 10 Outer case side surface 11 Outer case top plate 12 Tank unit legs 13, 13a, 13b Vacuum heat insulating material 14, 15, 16, 17 Molded heat insulating materials 18b, 18c, 18e Hole 18d Notch 19 Sealing member 21 Thermistor 30 Hot water storage tank unit

Claims (11)

A hot water storage tank,
A molded insulation covering the outside of the hot water storage tank;
A vacuum heat insulating material incorporated in the molded heat insulating material;
A hot water storage water heater equipped with
The molded heat insulating material has a confirmation part that exposes a part of the built-in vacuum heat insulating material, and a part of the vacuum heat insulating material is visible from the confirmation part,
The said confirmation part is the hot water storage type hot water supply machine provided in the inner surface side of the said shaping | molding heat insulating material which becomes an inner side when the said shaping | molding heat insulating material is mounted in the said hot water storage tank. A hot water storage tank,
A molded insulation covering the outside of the hot water storage tank;
A vacuum heat insulating material incorporated in the molded heat insulating material;
A hot water storage water heater equipped with
The molded heat insulating material has a confirmation part that exposes a part of the built-in vacuum heat insulating material, and a part of the vacuum heat insulating material is visible from the confirmation part,
The confirmation part includes an inner surface side of the molded heat insulating material that becomes an inner side when the molded heat insulating material is attached to the hot water storage tank, and an outer surface of the molded heat insulating material that becomes the outer side when the molded heat insulating material is attached to the hot water storage tank. Hot water storage type water heater provided on both the outer surface side of the. A hot water storage tank,
A molded insulation covering the outside of the hot water storage tank;
A vacuum heat insulating material incorporated in the molded heat insulating material;
A hot water storage water heater equipped with
The molded heat insulating material has a confirmation part that exposes a part of the built-in vacuum heat insulating material, and a part of the vacuum heat insulating material is visible from the confirmation part,
When the vacuum heat insulating material is damaged, the molded heat insulating material is formed around the confirmation portion of the formed heat insulating material so that the molded heat insulating material around the confirmation portion is deformed by expansion of the vacuum heat insulating material. A hot water storage type hot water supply machine with a part that has lower mechanical strength than other parts. The confirmation unit, hot-water storage type water heater according to claim 3 Symbol mounting is provided on the outer surface side of the molded heat insulator consisting the outer upon mounting the molded heat insulating material to the hot water storage tank. The hot water storage type water heater according to any one of claims 1 to 4 , wherein the confirmation unit is configured by a window-like hole provided in a wall surface of the molded heat insulating material that covers the vacuum heat insulating material. The confirmation unit, hot-water storage type water heater according to claim 3 Symbol mounting constituted by the shaped insulation portion is cut out notch of the end of the member. The hot water storage type hot water supply device according to any one of claims 1 to 6 , further comprising a sealing member that can be attached to the confirmation portion so as to close a defective portion of the molded heat insulating material constituting the confirmation portion. The hot water storage type hot water heater according to any one of claims 1 to 7 , wherein a mark for indicating a position of the confirmation portion is provided on the molded heat insulating material around the confirmation portion. A tank water temperature sensor installed in the hot water storage tank;
The hot water storage type hot water heater according to any one of claims 1 to 8 , wherein the confirmation unit is formed at a position corresponding to the water temperature sensor in the tank and has a portion penetrating the molded heat insulating material. The hot water storage type hot water heater according to any one of claims 1 to 9 , wherein the confirmation portion is provided at a plurality of locations along a circumferential direction of the molded heat insulating material. Upon manufacturing the molded heat insulating material according to claim 1 1 0 hot-water storage type water heater according to any one of the vacuum insulation material is placed in a mold, supporting the vacuum heat insulating material in the mold The manufacturing method of the shaping | molding heat insulating material which arrange | positions the support means to do in the position corresponded to the said confirmation part, and shape | molds.

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