JP4240148B1 - Hot water storage tank unit - Google Patents

Abstract

An object of the present invention is to provide a highly reliable hot water storage tank unit that can achieve both energy saving by reducing heat dissipation loss of a hot water storage tank and prevention of performance deterioration due to damage to a heat insulating material.
SOLUTION: At least two first vacuum heat insulating materials 4a and a second vacuum heat insulating material 4b are provided on the outer peripheral portion of a substantially cylindrical hot water storage tank 2, and the first vacuum heat insulating material 4a and the second vacuum heat insulating material 4b are provided. 2b, the outer peripheral end face 7b of the second vacuum heat insulating material 4b is folded back to the outer peripheral side of the second vacuum heat insulating material 4b, and the outer peripheral end face 7a of the first vacuum heat insulating material 4a is turned to the outer periphery of the second vacuum heat insulating material 4b. It is constructed so as to overlap the part end surface 7b, and the vacuum heat insulating material is brought into close contact with each other by overlapping the outer peripheral end surfaces of the vacuum heat insulating material, and the air between the vacuum heat insulating material and the substantially cylindrical container is placed on the outer peripheral side of the vacuum heat insulating material. No leakage occurs, heat dissipation loss can be reduced, and compactness and high efficiency can be achieved.
[Selection] Figure 1

Description

  The present invention relates to a hot water storage tank unit provided with a vacuum heat insulating material, and more particularly to a hot water storage tank unit that realizes space saving and high efficiency without reducing the heat insulating performance of the hot water storage tank.

  As a conventional hot water storage tank unit of this type, there is one using a vacuum heat insulating material as a heat insulating material (see, for example, Patent Document 1). 8 and 9 show the conventional hot water storage tank unit.

  As shown in FIGS. 8 and 9, the hot water storage tank unit 1 includes a cylindrical hot water storage tank 2 and a rectangular tubular outer case 3 that surrounds the hot water storage tank 2. In the space with 3, a vacuum heat insulating material 4 and a sheet-shaped heat insulating material 5 are installed to keep the hot water storage tank warm. The vacuum heat insulating material 4 is affixed along the shape of the hot water storage tank 2. The sheet-like heat insulating material 5 is installed so as to be filled in the space between the hot water storage tank 2 and the outer case 3.

In this way, by disposing the vacuum heat insulating material 4 in a portion where the space distance between the hot water storage tank 2 and the outer case 3 is small, the installation space can be reduced without reducing the heat insulating performance of the hot water storage tank 2, and the workability can be improved. It can be planned.
JP 2005-226965 A

  However, in the conventional configuration, when the capacity of the hot water storage tank 2 is large (for example, 460 L), the size of the vacuum heat insulating material 4 becomes large and the cost increases. Further, when the vacuum heat insulating material 4 is divided into a plurality of parts, there is a fear that heat dissipation loss from the gap between adjacent vacuum heat insulating materials 4 increases and the heat insulating performance of the hot water storage tank 2 decreases.

  Further, since the vacuum heat insulating material 4 is disposed so as to be substantially in contact with the outer case 3, the vacuum heat insulating material 4 may be damaged. The vacuum heat insulating material 4 is a heat insulating material in which a fiber material such as silica is wrapped with aluminum or the like and the inside is evacuated, and its thermal conductivity is 1/5 to 1/10 that of urethane, which is very high performance. It is a heat insulating material. On the other hand, it is relatively weak against external impacts, and once the internal vacuum cannot be maintained, the heat insulation performance is extremely lowered.

  The present invention solves the above-mentioned conventional problems, and prevents a heat loss from the gap between adjacent vacuum heat insulating materials and avoids damage to the vacuum heat insulating material to provide a highly efficient and reliable hot water storage tank unit. The purpose is to provide.

  In order to solve the conventional problem, a hot water storage tank unit of the present invention includes at least two first vacuum heat insulating materials and a second vacuum heat insulating material on an outer peripheral portion of the hot water storage tank, and the first vacuum heat insulating material and The second vacuum heat insulating material is formed by enclosing the core material with an outer skin material to make the inside vacuum, and then sealing the outer peripheral end face, and adjacent to the first vacuum heat insulating material and the second vacuum heat insulating material. Part, the outer peripheral part end surface of the second vacuum heat insulating material is folded back to the outer peripheral side of the second vacuum heat insulating material, and the outer peripheral part end surface of the first vacuum heat insulating material is turned to the outer peripheral part end surface of the second vacuum heat insulating material. It is characterized by being configured to overlap.

  As a result, the outer peripheral end surfaces of the vacuum heat insulating material are overlapped so that the vacuum heat insulating materials are in close contact with each other so that air between the vacuum heat insulating material and the substantially cylindrical container does not leak to the outer periphery of the vacuum heat insulating material, thereby reducing heat dissipation loss. be able to.

  ADVANTAGE OF THE INVENTION According to this invention, while reducing the heat dissipation loss from the clearance gap between vacuum heat insulating materials, the failure | damage of a vacuum heat insulating material can be prevented, and a highly efficient, compact, and reliable hot water storage tank unit can be provided.

  1st invention equips the outer peripheral part of a hot water storage tank with at least 2 sheets of 1st vacuum heat insulating material and 2nd vacuum heat insulating material, and said 1st vacuum heat insulating material and said 2nd vacuum heat insulating material have an outer shell as a core. The outer peripheral portion of the second vacuum heat insulating material is formed in an adjacent portion between the first vacuum heat insulating material and the second vacuum heat insulating material by sealing the outer peripheral end face after enclosing with a material and making the inside a vacuum state. The end surface is folded back to the outer peripheral side of the second vacuum heat insulating material, and the outer peripheral portion end surface of the first vacuum heat insulating material is configured to overlap the outer peripheral portion end surface of the second vacuum heat insulating material. In addition, the vacuum insulation material overlaps with each other so that the vacuum insulation material is in close contact with each other and air between the vacuum insulation material and the substantially cylindrical container does not leak to the outer circumference side of the vacuum insulation material, thereby reducing heat dissipation loss. Can be made more compact and more efficient.

  In the second invention, a heat insulating material is further disposed on the outer periphery of the adjacent portion of the first vacuum heat insulating material and the second vacuum heat insulating material. From the adjacent portion of the first vacuum heat insulating material and the second vacuum heat insulating material. This heat insulating material can prevent the vacuum heat insulating material from being damaged by an impact, and can improve efficiency and reliability.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited by this embodiment.

(Embodiment 1)
FIG. 1 is a configuration diagram of a hot water storage tank unit 1 according to the first embodiment of the present invention. FIG. 2 is a horizontal sectional view taken along the line AA ′ at a substantially central height of the hot water storage tank unit 1.

  1 and 2, the actual hot water storage tank unit 1 has a water supply pipe for supplying water to the hot water storage tank 2, a hot water supply pipe for extracting hot water from the hot water storage tank 2, and a mixture of water and hot water. However, in order to describe the heat insulation structure of the hot water storage tank unit 1, illustration and detailed description are omitted. To do.

  In FIG. 1, a hot water storage tank 2 is a substantially cylindrical container. Stainless steel is mainly used as the material for the hot water storage tank 2. The front surface of the hot water storage tank 2 has a front heat insulating material 3 for the purpose of reducing heat dissipation loss, the left and right side surfaces and the back surface of the hot water storage tank 2 have a first vacuum heat insulating material 4a and a second vacuum heat insulating material 4b, and an upper portion of the hot water storage tank 2. And the upper heat insulating material 5a and the lower heat insulating material 5b are installed in the lower part, respectively. A heat insulating material covering the hot water storage tank 2 and the outer periphery thereof is housed in the exterior body 6. Moreover, the 1st vacuum heat insulating material 4a is installed so that the lower part of the 2nd vacuum heat insulating material 4b may be adjoined.

  The surface shape of the hot water storage tank 2 in contact with the first vacuum heat insulating material 4a and the second vacuum heat insulating material 4b is a relatively simple two-dimensional curved surface. Therefore, the first vacuum heat insulating material 4 a and the second vacuum heat insulating material 4 b are installed so as to follow the outer periphery of the body of the hot water storage tank 2 by rolling a flat vacuum heat insulating material into a curved surface.

  The structure of the vacuum heat insulating material is shown in FIG. The vacuum heat insulating material is formed by wrapping a core material 10 made of a fiber material such as silica with an upper skin material 11a and a lower skin material 11b such as aluminum and evacuating the inside, and then subjecting the outer peripheral end faces 12a and 12b to a heat welding process or the like. It is a heat-insulating material that is hermetically sealed, and its thermal conductivity is one-fifth to one-tenth that of urethane and is a very high-performance heat-insulating material. Therefore, if a vacuum heat insulating material is used for heat insulation of the side surface of the hot water storage tank 2, the thickness of the heat insulating material can be made thinner than that of urethane or the like, and the hot water storage tank unit 1 can be made compact. .

  The capacity of hot water storage tanks for general households currently on the market is 300L to 560L, and the size of the vacuum heat insulating material is very large in order to cover the entire outer periphery of the hot water tank 2 with a single vacuum heat insulating material. turn into. On the other hand, when considering the manufacturability, moldability, and assemblability of the vacuum heat insulating material, the maximum size of the vacuum heat insulating material is appropriately about 0.5 m × 1 m. Therefore, for the heat insulation of the side surface of the hot water storage tank 2, a plurality of vacuum heat insulating materials such as the first vacuum heat insulating material 4a and the second vacuum heat insulating material 4b may be used.

  Here, the structure of the adjacent part of the 1st vacuum heat insulating material 4a and the 2nd vacuum heat insulating material 4b is demonstrated. FIG. 3 is an enlarged view of an adjacent portion (B portion in FIG. 1) of two vacuum heat insulating materials (first vacuum heat insulating material 4a and second vacuum heat insulating material 4b). As shown in FIG. 3, the outer peripheral end surface 7b of the second vacuum heat insulating material 4b is folded back to the outer peripheral side of the second vacuum heat insulating material 4b, and the outer peripheral end surface 7a of the first vacuum heat insulating material 4a is turned to the second vacuum heat insulating material 4b. It is comprised so that it may overlap with the outer peripheral part end surface 7b. In actual production, the adjacent portions of the first vacuum heat insulating material 4a and the second vacuum heat insulating material 4b are fixed with a tape or the like (not shown).

  As a result, the outer peripheral end surfaces of the vacuum heat insulating material are overlapped so that the vacuum heat insulating materials are in close contact with each other so that air between the vacuum heat insulating material and the substantially cylindrical container does not leak to the outer periphery of the vacuum heat insulating material, thereby reducing heat dissipation loss. be able to.

  In addition, the other heat insulating materials (front heat insulating material 3, upper heat insulating material 5a, lower heat insulating material 5b) have a complicated three-dimensional curved surface shape of the hot water storage tank 2, and various pipes penetrate the heat insulating material. For this reason, foamed polystyrene, foamed urethane, etc., which have good workability and are relatively inexpensive, are used. Of course, other fiber materials such as glass wool and glass fiber may be used.

  Thus, a high-performance hot water storage tank unit can be configured by properly using the heat insulating material according to the characteristics of the portion to be insulated.

  As described above, in the hot water storage tank unit of the present invention, at least two first vacuum heat insulating materials 4a and second vacuum heat insulating materials 4b are provided on the outer peripheral portion of the substantially cylindrical hot water storage tank 2, and the first vacuum heat insulating material is provided. 4a and the second vacuum heat insulating material 4b, the outer peripheral end surface 7b of the second vacuum heat insulating material 4b is folded back to the outer peripheral side of the second heat insulating material 4b, and the outer peripheral end surface 7a of the first vacuum heat insulating material 4a is It is configured to overlap with the outer peripheral end face 7b of the second vacuum heat insulating material, whereby the vacuum heat insulating material is in close contact with each other by overlapping the outer peripheral end face of the vacuum heat insulating material, so that the vacuum heat insulating material and the substantially cylindrical container are in close contact with each other. Air does not leak to the outer peripheral side of the vacuum heat insulating material, so that heat dissipation loss can be reduced, and compactness and high efficiency can be achieved.

  Moreover, about the adjacent part of the 1st vacuum heat insulating material 4a and the 2nd vacuum heat insulating material 4b, as shown in FIG. 5, the outer peripheral part end surface 7a of the 1st vacuum heat insulating material 4a is the outer peripheral side of the 1st vacuum heat insulating material 4a. The outer peripheral end face 7b of the second vacuum heat insulating material 4b may be configured to overlap the outer peripheral end face 7a of the first vacuum heat insulating material 4a. In this way, even if the air between the hot water storage tank 2 and the first vacuum heat insulation 4a is warmed and rises, it is suppressed from above by the outer peripheral end face 7b of the second vacuum heat insulating material 4b. Air leakage, that is, heat radiation loss can be more reliably reduced, and energy saving can be achieved.

(Embodiment 2)
FIG. 6 is a configuration diagram of a hot water storage tank unit according to the second embodiment of the present invention.

  This embodiment is different from the first embodiment in that a sheet-like heat insulating material 8 is installed on the outer periphery of the adjacent portion of the first vacuum heat insulating material 4a and the second vacuum heat insulating material 4b in FIG. .

  Vacuum insulation materials are superior in terms of heat insulation performance to polystyrene foam, urethane foam, etc., but are relatively weak against external vibrations and shocks, and once the air is mixed inside the insulation material, the heat insulation performance is extremely reduced. There is a fear.

  Then, by installing the sheet-like heat insulating material 8 on the outer periphery of the adjacent portion between the first vacuum heat insulating material 4a and the second vacuum heat insulating material 4b, from the adjacent portion between the first vacuum heat insulating material 4a and the second vacuum heat insulating material 4b. In addition to further reducing heat dissipation loss, the impact from the outside of the hot water tank unit 1 can be transmitted directly to the vacuum heat insulating material to prevent the vacuum heat insulating material from being damaged, improving efficiency and improving reliability. You can plan.

  The hot water storage tank unit according to the present invention can be used for a hot water storage tank unit of an electric water heater using an electric heater as well as a heat pump water heater using a heat pump unit as a heating means of the hot water storage tank.

The block diagram of the hot water storage tank unit in Embodiment 1 of this invention A-A 'horizontal sectional view of FIG. B part of FIG. 1 (adjacent part of the first heat insulating material and the second heat insulating material) enlarged view The block diagram of the vacuum heat insulating material in Embodiment 1 of this invention The other block diagram of the adjacent part of the 1st heat insulating material and the 2nd heat insulating material The block diagram of the hot water storage tank unit in Embodiment 2 of this invention C-C 'horizontal sectional view of FIG. Configuration diagram of a hot water storage tank unit of a conventional hot water storage type hot water supply system D-D 'horizontal sectional view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hot water storage tank unit 2 Hot water storage tank 3 Front heat insulating material 4a 1st vacuum heat insulating material 4b 2nd vacuum heat insulating material 5a Upper heat insulating material 5b Lower heat insulating material 6 Exterior body 7a End face of outer peripheral part of 1st vacuum heat insulating material 7b 2nd vacuum heat insulating material Outer end face of sheet 8 Insulated sheet

Claims (2)

An outer peripheral portion of the hot water storage tank is provided with at least two first vacuum heat insulating materials and a second vacuum heat insulating material, and the first vacuum heat insulating material and the second vacuum heat insulating material surround the core material with an outer skin material and are internally The outer peripheral end face is hermetically sealed after forming the vacuum state, and the outer peripheral end face of the second vacuum heat insulating material is adjacent to the second vacuum in the adjacent part of the first vacuum heat insulating material and the second vacuum heat insulating material. A hot water storage tank unit configured to be folded back to the outer peripheral side of the heat insulating material and overlap the outer peripheral end surface of the first vacuum heat insulating material with the outer peripheral end surface of the second vacuum heat insulating material. The hot water storage tank unit according to claim 1, further comprising a heat insulating material disposed on an outer periphery of an adjacent portion between the first vacuum heat insulating material and the second vacuum heat insulating material.

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