JP2010084967A - Heat insulating structure of hot water storage tank and water heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat insulating structure of a hot water storage tank, and a water heater capable of improving the mounting performance of a vacuum heat insulating material to the hot water storage tank, and further improving heat insulating performance. <P>SOLUTION: In the heat insulating structure of the hot water storage tank 1 storing warm water for hot water supply, the vacuum heat insulating materials 2a, 2b having ends where welding parts of sealing margins 5a, 5b are folded to bodies 2ah, 2bh side are mounted around the hot water storage tank 1. Preferably, both the vacuum heat insulating materials 2a, 2b are mounted around the hot water storage tank 1 in a state that an end of one vacuum heat insulating material 2a and an end of the other vacuum heat insulating material 2b abut on each other, and a clearance c is formed between both ends, and the other heat insulating material 6 is attached to the clearance c. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a heat insulating structure for a hot water storage tank for storing hot water for hot water supply such as a heat pump hot water heater and a heater hot water heater, and a hot water heater.

  As a conventional heat insulation structure of a hot water storage tank, for example, in the heat insulation structure disclosed in Patent Document 1, a slit toward the hot water tank contact surface in the axial direction is provided around the hot water storage tank for the purpose of heat insulation and heat insulation of the hot water storage tank. A semi-cylindrical vacuum heat insulating material that is provided with a plurality of semi-cylindrical vacuum heat insulating materials and a semi-cylindrical normal heat insulating material having a predetermined thickness that covers the semi-cylindrical vacuum heat insulating material, and forms a semi-cylindrical heat insulating material. At least two pieces of the semicylindrical heat insulators are covered with a hot water storage tank interposed therebetween.

That is, in Patent Document 1, the inner vacuum heat insulating material is divided into a plurality of parts, and the plurality of divided vacuum heat insulating materials are attached to the inner side of another heat insulating material to form a double heat insulating material.
As a result, a heat insulating structure having a compact and inexpensive structure is realized, and even if the vacuum heat insulating material is damaged, the loss of the heat insulating performance can be suppressed without causing a total loss.
Japanese Patent Laying-Open No. 2008-39282 (paragraphs 0025 to 0031, FIG. 2, etc.)

By the way, when attaching a vacuum heat insulating material around the hot water storage tank, when the end portions of the welding portion of the sealing margin around the vacuum heat insulating material are butted together, the end portion which is the welding portion has a considerable rigidity, When the end of the welded portion of the vacuum heat insulating material comes into contact with the other vacuum heat insulating material, the other vacuum heat insulating material may be damaged.
However, when attaching a vacuum heat insulating material around a hot water storage tank in patent document 1, there is no particular mention about the structure of the butt | matching part of the edge parts of the welding part of a vacuum heat insulating material.

  In view of the above situation, an object of the present invention is to provide a heat insulating structure for a hot water storage tank and a water heater that can improve the heat insulating performance while improving the attachment property of the vacuum heat insulating material to the hot water storage tank.

  In order to achieve the above object, the heat insulation structure of the hot water storage tank according to the first aspect of the present invention is a heat insulation structure of the hot water storage tank for storing hot water for hot water supply, and is an end where the welding portion of the sealing margin is folded back to the main body side. A vacuum heat insulating material having a portion is attached around the hot water storage tank.

  The heat insulation structure of the hot water storage tank according to the second aspect of the present invention is a heat insulation structure of a hot water storage tank for storing hot water for hot water supply, and a vacuum heat insulating material attached around the hot water storage tank and an outer plate covering the hot water storage tank And a second heat insulating material that presses the vacuum heat insulating material toward the hot water storage tank.

  The heat insulation structure of the hot water storage tank according to the third aspect of the present invention is a heat insulation structure of a hot water storage tank for storing hot water for hot water supply, and covers a vacuum heat insulating material attached around the hot water storage tank and the hot water storage tank. And an outer plate for pressing the heat insulating material toward the hot water storage tank.

  A water heater according to a fourth aspect of the present invention is a hot water heater having a hot water storage tank for storing hot water for hot water supply, and a vacuum heat insulating material having an end portion where a welding portion of a sealing margin is folded back to the main body side. It is attached around.

  A water heater according to a fifth aspect of the present invention is a water heater having a hot water storage tank for storing hot water for hot water supply, and is attached to a vacuum heat insulating material attached around the hot water storage tank and an outer plate covering the hot water storage tank. And a second heat insulating material that presses the vacuum heat insulating material toward the hot water storage tank.

  A water heater according to a sixth aspect of the present invention is a water heater having a hot water storage tank for storing hot water for hot water supply, and covers a vacuum heat insulating material attached around the hot water storage tank, the hot water storage tank, and a vacuum heat insulating material. And an outer plate that can be pressed toward the hot water storage tank.

  ADVANTAGE OF THE INVENTION According to this invention, the heat insulation structure of a hot water storage tank and the hot water supply machine which can improve the heat insulation performance while improving the attachment property of the vacuum heat insulating material to a hot water storage tank are realizable.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
Fig.1 (a) is a side view which shows the state which has arrange | positioned the long-shaped vacuum heat insulating materials 2a and 2b around the hot water storage tank 1 of embodiment which concerns on this invention, FIG.1 (b) is FIG. It is a top view which shows the state which has arrange | positioned the long-shaped vacuum heat insulating materials 2a and 2b around the hot water storage tank 1 shown to (a), FIG.1 (c) is the A section enlarged view of FIG.1 (b). .
In addition, although the heat insulating material is provided in the upper surface 1j and the lower surface 1s of the hot water storage tank 1, it has abbreviate | omitted and shown in Fig.1 (a).

<< Outline of heat insulation structure of hot water storage tank 1 >>
In the heat insulation structure of the hot water storage tank 1 of the embodiment, as shown in FIG. 1 (b), the end portions 7a and 7b obtained by folding the sealing margins 5a and 5b of the vacuum heat insulating materials 2a and 2b around the hot water storage tank 1 are fixed. The gap c is opened and another heat insulating material 6 is attached to the gap c. That is, the end surfaces formed by folding the sealing allowances 5a and 5b face each other.
By opening the gap c, the vacuum heat insulating materials 2a and 2b do not collide with each other without hitting each other. Moreover, since the another heat insulating material 6 is provided in the clearance gap c, the heat radiation from the clearance gap c is suppressed.
Further, by holding the vacuum heat insulating materials 2a and 2b covering the hot water storage tank 1 with another heat insulating material 9 (see FIG. 4 to be described later) or an outer plate 8 such as an iron plate (see FIG. 5 to be described later), the vacuum heat insulating material 2a 2b is prevented from leaving the hot water storage tank 1.

  The hot water storage tank 1 described in detail below is widely used in water heaters such as a heat pump type water heater that produces hot water with a heat pump and a heater type hot water heater that produces hot water with a heater. For example, in a heat pump type hot water heater, hot water made by a heat pump is stored in a hot water storage tank 1 and used for hot water supply. In a heater type hot water heater, hot water made by a heater is stored in a hot water storage tank 1 and used for hot water supply. Yes.

Hereinafter, the heat insulation structure of the hot water storage tank 1 will be described in detail.
<Overall structure of heat insulation structure of hot water storage tank 1>
Next, the whole structure of the heat insulation structure of the hot water storage tank 1 will be described.
The hot water storage tank 1 shown in FIGS. 1A and 1B has a rectangular parallelepiped shape having a height s1 of about 90 cm, a depth s2 of about 130 cm, and a width s3 of about 41 cm. Hot water heated by a heat pump, a heater or the like using such as is stored.
Three hot water storage tanks 1 are provided from one side surface 1r to the rear surface 1z except for the front surface 1u provided with piping, the upper surface 1j provided with another heat insulating material (not shown), and the lower surface 1s (see FIG. 1A). The rectangular vacuum heat insulating material 2a is disposed, and similarly to the vacuum heat insulating material 2a shown in FIG. 1A, three rectangular vacuum heat insulating materials 2b are disposed from the other side surface 1t to the rear surface 1z. Has been. A normal heat insulating material (for example, polystyrene foam, glass wool, etc.) different from the vacuum heat insulating material is disposed on the front surface 1u.
The vacuum heat insulating materials 2a and 2b have the same shape.

As shown in FIG. 1 (c), the sealing margin 5a of the vacuum heat insulating material 2a disposed from the one side surface 1r to the rear surface 1z of the hot water storage tank 1 is folded outward and is in close contact with the heat insulating material body 2ah, while the other side surface. The sealing margin 5b of the vacuum heat insulating material 2b disposed from 1t to the rear surface 1z is folded outward and is in close contact with the heat insulating material body 2bh.
And the normal heat insulating material 6 is attached to the clearance gap c between the edge part 7a of the vacuum heat insulating material 2a, and the edge part 7b of the vacuum heat insulating material 2b.

<Vacuum insulation 2>
Next, the vacuum heat insulating material 2 (2a, 2b) will be described.
Fig.2 (a) is a top view of the vacuum heat insulating material 2 (2a, 2b) of embodiment, FIG.2 (b) is a BB sectional drawing of Fig.2 (a).
As shown in FIG. 2A, the vacuum heat insulating material 2 has, for example, a thin rectangular shape with a longitudinal dimension f1 of 30 cm, a lateral dimension f2 of 125 cm, and a thickness dimension f3 (see FIG. 2B) of 1 cm. It has a sealing margin 5 with a width dimension f4 around 5 cm.
In addition, it cannot be overemphasized that the dimension of each part of the vacuum heat insulating material 2 is not limited to the said dimension.

As shown in FIG. 2 (b), the vacuum heat insulating material 2 wraps glass wool or the like as the core material 3 with an aluminum gas barrier film 4 and evacuates the inside where the core material 3 is located. It is a plate-like heat insulating material sealed with a sealed sealing allowance 5.
Thus, a sealing allowance 5 is formed around the vacuum heat insulating material 2 in order to maintain the vacuum state therein.
Here, as shown in FIG. 2A, the sealing allowance 5 in the vacuum heat insulating material 2 is formed so as to be expanded toward the outside air, so that the heat radiation area may be expanded and the heat insulating performance may be deteriorated.

FIG. 3 is a view taken in the direction of the arrow C in FIG.
Therefore, the vacuum heat insulating material 2 (2a, 2b) shown in FIG. 2 is folded back as shown in FIG. 3 so that the heat sealing body 5h (2ah, 2bh) is hot-melted with a nonflammable adhesive. Adhering with a tape or the like, the heat radiation area of the sealing allowance 5 is reduced, and the heat insulation is improved.
3 shows a case where the sealing allowance 5 (the seal allowance 5 on the left side of FIG. 2A) of one end portion of the vacuum heat insulating material 2 is folded for easy understanding. In this case, the vacuum heat insulating material 2 in which the four-way sealing margin 5 is folded back and adhered to the heat insulating material main body 2h is used.

In addition, the vacuum heat insulating material 2 may use what turned up the sealing allowance 5 of the edge part of 4 directions as illustrated in this embodiment, or it turned up only the sealing allowance 5 of the one end part. May be used, or may be used by folding back the sealing margin 5 at the two ends, or may be used by folding back the sealing margin 5 at the three ends. Not.
By the way, there is a vacuum heat insulating material in which glass wool as a core material disposed inside is bonded and cured with a binder or the like. As the vacuum heat insulating material 2, glass wool as a core material 3 is bonded with an adhesive such as a binder. A so-called “binderless” type vacuum heat insulating material that is not adhesively cured is used. Since the vacuum heat insulating material 2 has flexibility, the vacuum heat insulating material 2 can be easily bent. The vacuum heat insulating material 2 is devised so that glass wool is not scattered by storing glass wool in a bag such as a polyethylene film instead of using a binder. Some vacuum heat insulating materials heat-bond glass fiber fibers together, but the vacuum heat insulating material 2 is not heat-bonded to ensure flexibility.

<Attaching the vacuum heat insulating material 2 to the hot water storage tank 1>
Next, attachment of the vacuum heat insulating material 2 (2a, 2b) to the hot water storage tank 1 will be described.
The hot water storage tank 1 stores hot water in which hot water is heated by operating a heat pump unit, a heater (not shown) or the like using cheap electric power at night. The hot water stored in the hot water storage tank 1 is used during the day.
For this reason, the hot water storage tank 1 is required to have high heat insulation properties so that the stored hot water does not cool.
Therefore, in order to improve the heat retention performance, vacuum heat insulating materials 2a and 2b having low thermal conductivity are attached around the hot water storage tank 1.

That is, the four-way sealing margin 5a of the vacuum heat insulating material 2a is brought into close contact with the heat insulating material main body 2ah (see FIG. 3), and as shown in FIG. In this way, the vacuum heat insulating material 2a is attached to the hot water storage tank 1 from one side surface 1r to the rear surface 1z of the hot water storage tank 1 using hot melt, double-sided tape or the like.
Similarly, the sealing margin 5b on the four sides of the vacuum heat insulating material 2b is brought into close contact with the heat insulating material body 2bh (see FIG. 3), and the sealing margin 5b in close contact with the heat insulating material body 2bh is outside as shown in FIG. Then, the vacuum heat insulating material 2a is attached to the hot water storage tank 1 from the other side surface 1t to the rear surface 1z of the hot water storage tank 1 using hot melt, double-sided tape or the like.

  In attaching the vacuum heat insulating material 2 (2a, 2b), the flat vacuum heat insulating material 2 (2a, 2b) is attached while being deformed along the shape of the hot water storage tank 1. However, the present invention is not limited to this, and the vacuum heat insulating material 2 (2a, 2b) is first bent according to the shape of the corner of the hot water tank 1 using a jig or the like and then attached to the hot water tank 1. It may be a thing.

At this time, as shown in FIG. 1 (c), the end 7a of the vacuum heat insulating material 2a does not damage the other vacuum heat insulating material 2b, and the end 7b of the vacuum heat insulating material 2b is the other side. In order not to damage the vacuum heat insulating material 2a, a gap c is provided between the end 7a of the vacuum heat insulating material 2a and the end 7b of the vacuum heat insulating material 2b, and another soft heat insulating material 6 is provided in the gap c. Is attached with heat-resistant adhesive or tape. As the heat insulating material 6, for example, polystyrene, glass wool or the like is used.
Thus, in the example shown in FIG. 1, three vacuum heat insulating materials 2a are attached from one side 1r to the rear surface 1z of the hot water storage tank 1, and three sheets from the other side surface 1t of the hot water storage tank 1 to the rear surface 1z. The vacuum heat insulating material 2b is attached, and a gap c is formed between the end 7a of the vacuum heat insulating material 2a and the end 7b of the vacuum heat insulating material 2b, so that the vacuum heat insulating materials 2a and 2b are not damaged without contact. .

Moreover, by attaching the heat insulating material 6 to the gap c between the end 7a of the vacuum heat insulating material 2a and the end 7b of the vacuum heat insulating material 2b, heat radiation from the gap c is suppressed as much as possible.
Here, a gap c is similarly formed between the three vacuum heat insulating materials 2a provided from one side surface 1r to the rear surface 1z of the hot water storage tank 1 shown in FIGS. 1 (a) and 1 (b), and the heat insulating material is formed in the gap c. 6 is provided. A gap c is similarly formed between the three vacuum heat insulating materials 2b provided from the other side surface 1t to the rear surface 1z of the hot water storage tank 1, and a heat insulating material 6 is provided in the gap c.

Since the hot water in the hot water storage tank 1 is higher at the upper part, the temperature difference from the outside air temperature is higher at the upper part, and the heat from the upper part of the hot water storage tank 1 is larger than that from the lower part. Therefore, it is preferable that the upper part of the hot water storage tank 1 is provided with more heat insulating material than the lower part.
For example, the vacuum heat insulating materials 2 a and 2 b are provided only on the upper part of the hot water storage tank 1. In this case, a normal heat insulating material may be disposed in the lower part of the hot water storage tank 1.
Alternatively, the heat insulating material of the hot water storage tank 1 is made thicker at the upper part than the lower part. For example, a plurality of vacuum heat insulating materials 2a and 2b are provided at the upper part of the hot water storage tank 1, and Insulating materials 2a, 2b, etc.

Note that a gap c is formed between the vacuum heat insulating materials 2 so that the sealing margin 5 that is folded and adhered to the heat insulating material body 2h of the vacuum heat insulating material 2 is on the outside, and another heat insulating material 6 is formed in the gap c. As illustrated in the present embodiment, the structure provided with the above may be applied to all end portions of adjacent vacuum heat insulating materials 2, that is, three end portions, or one end portion between the vacuum heat insulating materials 2. May be applied only to the two ends.
Or depending on the case, you may apply to the edge part of four directions, and it is not limited.

  For example, as shown in FIG. 1 (c), a gap c is formed only between the rear surfaces 1z of the hot water storage tank 1 between the sealing margins 5a and 5b that are folded and adhered to the heat insulating material bodies 2ah and 2bh of the vacuum heat insulating materials 2a and 2b. In addition, another heat insulating material 6 is provided in the gap c. And the sealing allowance 5a arrange | positioned between the three vacuum heat insulating materials 2a arrange | positioned from the one side surface 1r of the hot water storage tank 1 to the rear surface 1z is not folded, but is piled up on the adjacent vacuum heat insulating material 2a. Similarly, the sealing allowance 5b disposed between the three vacuum heat insulating materials 2b disposed from the other side surface 1t to the rear surface 1z of the hot water storage tank 1 may be overlapped on the adjacent vacuum heat insulating materials 2b without being folded back. Good.

<< Prevention of peeling of vacuum heat insulating materials 2a and 2b from hot water storage tank 1 >>
Next, a configuration for preventing the vacuum heat insulating materials 2a and 2b attached around the hot water storage tank 1 from peeling off from the hot water storage tank 1 will be described.
FIG. 4 is a top view showing a state in which the hot water storage tank 1 to which the vacuum heat insulating materials 2a and 2b (see FIG. 1C) are attached is housed in the outer plate (or housing) 8. In addition, although the heat insulating material and the outer plate are provided on the upper surface 1j of the hot water storage tank 1, they are omitted in FIG.
The casing refers to an outer plate that covers the front surface 1u, the rear surface 1z, the one side surface 1r, the other side surface 1t, the upper surface 1j, and the lower surface 1s of the hot water storage tank 1, or the front surface excluding the lower surface 1s of the hot water storage tank 1. 1u, the rear surface 1z, one side surface 1r, the other side surface 1t, and the outer plate | board which covers the upper surface 1j, respectively.
As described above, since the hot water storage tank 1 is required to have high heat insulation properties so that the hot water in the inside is not cooled, the vacuum heat insulating materials 2a and 2b having low thermal conductivity are provided around the hot water storage tank 1 with double-sided tape. It is attached with hot melt or the like to improve heat insulation performance.

Here, since hot hot water is stored in the hot water storage tank 1, the temperature of the outer surface of the hot water storage tank 1 rises to about 90 degrees.
The vacuum heat insulating materials 2a and 2b are attached to the hot water storage tank 1 with high temperature using a heat-resistant double-sided tape or hot melt. There is a concern that it may peel off from 2a, 2b, etc. or may float.
Therefore, as shown in FIG. 4, another heat insulating material 9 is attached to the outer plate 8 such as a coated iron plate covering the hot water storage tank 1, and the vacuum heat insulating materials 2 a and 2 b are attached from the outside to the inside by the heat insulating material 9. The hot water storage tank 1 can be pressed.

According to this configuration, the vacuum heat insulating materials 2a and 2b around the hot water storage tank 1 are pressed from the outside toward the inner hot water storage tank 1 by another heat insulating material 9, so that the vacuum heat insulating materials 2a and 2b are stored in the hot water storage tank. The tank 1 is prevented from peeling off or floating. Therefore, the reliability of the heat insulation performance of the hot water storage tank 1 is improved.
In addition, since another heat insulating material 9 is disposed between the vacuum heat insulating materials 2a and 2b around the hot water storage tank 1 and the outer plate 8 exposed to the outside, it is further suppressed that the outer plate 8 becomes hot. .

<Deformation form for preventing peeling of vacuum heat insulating materials 2a, 2b from hot water storage tank 1>
FIG. 5 is a top view showing a configuration in which the hot water storage tank 1 to which the modified vacuum heat insulating materials 2a and 2b are attached is housed in the outer plate 28 (28a, 28b, 28c). In addition, FIG. 5 also omits and shows the heat insulating material, the outer plate, and the like provided on the upper surface 1j of the hot water storage tank 1, similarly to FIG.
In the modification, the vacuum heat insulating materials 2a and 2b around the hot water storage tank 1 are directly pressed by the outer plates 28a and 28b.
As shown in FIG. 5, an outer plate 28a that is bent from one side surface 1r of the hot water storage tank 1 to the rear surface 1z side and covers the vacuum heat insulating material 2a, and a vacuum heat insulating material 2b that is bent from the other side surface 1t of the hot water storage tank 1 to the rear surface 1z side. And the rear surface 1z of the hot water storage tank 1 to which the vacuum heat insulating materials 2a and 2b are attached, and correspond to the screw hole 28a1 provided in the outer plate 28a and the screw hole 28b1 provided in the outer plate 28b, respectively. The outer plate 28c having the mounting holes 28c1 and 28c2 is used.

Here, the pitch p between the mounting holes 28c1, 28c2 of the outer plate 28c is formed smaller than the dimension f5 between the outer surface 2a1 of the vacuum heat insulating material 2a of the hot water storage tank 1 and the outer surface 2b1 of the vacuum heat insulating material 2b.
That is,
Pitch p between mounting holes 28c1 and 28c2 <Dimension f5 between outer surfaces 2a1 and 2b1 of vacuum heat insulating material
And
The outer plate 28a covers the vacuum heat insulating material 2a on the one side 1r and the rear surface 1z of the hot water storage tank 1, and the outer plate 28b covers the vacuum heat insulating material 2b on the other side surface 1t and the rear surface 1z of the hot water storage tank 1, The mounting holes 28c1, 28c2 of the outer plate 28c are aligned with the screw holes 28a1 of the outer plate 28a and the screw holes 28b1 of the outer plate 28b, and a bolt n is inserted, and the outer plate 28c is connected to the outer plate 28a and the outer plate 28b with the bolt n. Screw on to.

Accordingly, as described above, the pitch p between the mounting holes 28c1 and 28c2 of the outer plate 28c is smaller than the dimension f5 between the outer surface 2a1 of the vacuum heat insulating material 2a of the hot water storage tank 1 and the outer surface 2b1 of the vacuum heat insulating material 2b. The vacuum heat insulating material 2a is pressed toward the hot water storage tank 1 by the outer plate 28a, and the vacuum heat insulating material 2b is pressed toward the hot water storage tank 1 by the outer plate 28b.
According to this configuration, the vacuum heat insulating materials 2a and 2b around the hot water storage tank 1 are pressed from the outside toward the inner hot water storage tank 1 by the outer plates 28a and 28b, respectively. It is possible to prevent the hot water tank 1 from peeling off or floating.

In the present embodiment, the configuration in which the outer plates 28a and 28b are screwed to the outer plate 28c, respectively, is exemplified. An engagement protrusion may be formed on either one of the other, the engagement protrusion may be engaged with the engagement hole, and the outer plate 28c and the outer plates 28a and 28b may be fixed.
Alternatively, attachment holes and attachment projections are formed in the outer plates 28a and 28b and the outer plate 28c, respectively, and separate attachment members are attached to the respective attachment holes and attachment projections of the outer plates 28a and 28b and the outer plate 28c. The outer plate 28c and the outer plates 28a and 28b may be fixed.
As described above, if the outer plates 28a and 28b hold the vacuum heat insulating materials 2a and 2b toward the hot water storage tank 1, the configuration can be selected as appropriate.
In addition, in this description, although the attachment structure (refer FIG. 5) of the one side edge part of the hot water storage tank 1 was demonstrated, the attachment of the other side edge part is performed similarly.

<< Summary >>
As shown in FIG. 1C, the hot water storage tank 1 of the present embodiment has a welded portion of the sealing allowances 5a and 5b of the vacuum heat insulating materials 2a and 2b around the back surface (the opposite side on which the hot water storage tank 1 is disposed). When the vacuum heat insulating materials 2a and 2b are butted together, the gap 7 is attached with a certain gap c, and the end 7a (7b) is attached to the other vacuum heat insulating material 2b (2a). Another heat insulating material 6 is attached to the gap c so as not to be damaged.

Further, as shown in FIG. 4, the hot water storage tank 1 is an outer plate that covers the hot water storage tank 1 so that it does not peel off when the vacuum heat insulating materials 2a and 2b are attached to the hot water storage tank 1 with double-sided tape or hot melt. Another heat insulating material 9 is attached to the side 8 so that the heat insulating material 9 can hold the vacuum heat insulating materials 2a and 2b, and even if the adhesive force such as double-sided tape or hot melt is weakened, 9 is characterized in that the vacuum heat insulating materials 2 a and 2 b are prevented from being detached from the hot water storage tank 1 by the presser 9.
Moreover, as shown in FIG. 5, you may hold | suppress the vacuum heat insulating materials 2a and 2b of the hot water storage tank 1 toward the hot water storage tank 1 directly with the outer plates 28a and 28b, respectively.

<< Action and effect >>
The vacuum heat insulating materials 2a and 2b are plate-shaped heat insulating materials in which glass wool as the core material 3 is wrapped inside with an aluminum gas barrier film 4 and the inside is evacuated and hermetically sealed.
Since the sealing allowances 5a and 5b of the vacuum heat insulating materials 2a and 2b cause heat leakage, the welded portions of the sealing allowances 5a and 5b are folded back to the back surface to reliably reduce heat leakage.
Further, a gap c is provided between the end portions 7a and 7b so that the end portion 7a (7b) does not damage the other vacuum heat insulating material 2b (2a), and another soft heat insulating material is provided in the gap c. 6 is attached and the damage of the vacuum heat insulating material 2b (2a) is suppressed.

The vacuum heat insulating materials 2a and 2b are attached to the hot water storage tank 1 with double-sided tape, hot melt, or the like, but an outer plate that covers the hot water storage tank 1 so that the vacuum heat insulating materials 2a and 2b are not peeled off from the hot water storage tank 1. 8 is attached with another heat insulating material 9 so that the heat insulating material 9 can hold the vacuum heat insulating materials 2a and 2b to prevent the vacuum heat insulating materials 2a and 2b from being peeled off from the hot water storage tank 1 and lifted. In this case, the heat of the hot water storage tank 1 is further insulated by the heat insulating material 6 between the vacuum heat insulating materials 2 a and 2 b of the hot water storage tank 1 and the outer plate 8, and the temperature rise of the outer plate 8 can be suppressed.
Alternatively, the vacuum heat insulating materials 2a and 2b attached around the hot water storage tank 1 can be directly pressed by the outer plates 28a and 28b, so that the vacuum heat insulating materials 2a and 2b can be prevented from being peeled off and lifted up. .

In addition, in this embodiment, although the structure which attaches the vacuum heat insulating materials 2a and 2b which have the adhesion allowances 5a and 5b turned back to the opposite side of the hot water storage tank 1 to the hot water storage tank 1 was demonstrated, the contact allowances 5a and 5b were demonstrated. It is good also as a structure which attaches to the hot water storage tank 1 the vacuum heat insulating materials 2a and 2b turned back to the hot water storage tank 1 side.
Moreover, in this embodiment, while attaching the vacuum heat insulating materials 2a and 2b which turned the welding part of the sealing allowances 5a and 5b around the hot water storage tank 1, another heat insulating material 6 was attached between the vacuum heat insulating materials 2a and 2b. Although an example has been described, when only the vacuum heat insulating material that is folded back of the welding portion of the sealing allowances 5a and 5b is attached around the hot water storage tank 1, heat dissipation from the sealing allowances 5a and 5b is suppressed. Insulation performance can be improved.

Alternatively, by attaching the two vacuum heat insulating materials around the hot water storage tank 1 by causing the end of one vacuum heat insulating material and the end of the other vacuum heat insulating material to face each other and opening a gap between the two end portions, The problem that one end portion of the vacuum heat insulating material comes into contact with the other vacuum heat insulating material and is damaged can be solved.
Alternatively, by attaching a vacuum heat insulating material around the hot water storage tank 1 with the ends of the vacuum heat insulating material facing each other with a gap between them, one vacuum heat insulation is provided for the round hot water storage tank 1 or the small hot water storage tank 1. It is also possible to provide the material in one roll. In this case, another heat insulating material may be provided in the gap between the end portions of the vacuum heat insulating material to further improve the heat insulating performance and improve the reliability of the vacuum heat insulating material.

In the present embodiment, the case where a heat pump, a heater, or the like is used as a heat source has been described as an example. It is applicable to.
As mentioned above, although the heat insulation structure of the hot water storage tank of this invention was demonstrated based on embodiment, this invention is not limited to the structure described in the said embodiment, In the range which does not deviate from the meaning, the structure suitably It is possible to change.

  For example, in the above embodiment, the abutting portion between the end portions of the vacuum heat insulating material is located on the flat surface portion (that is, the rear surface 1z) of the hot water storage tank 1, but is located at the corner of the hot water storage tank 1. It may be a thing.

(a) is a side view showing a state in which a long vacuum heat insulating material is arranged around the hot water storage tank, and (b) is a long shape vacuum heat insulating material arranged around the hot water storage tank shown in (a). It is a top view which shows the state which carried out, (c) is the A section enlarged view of (b). (a) is a top view of the vacuum heat insulating material of embodiment, (b) is the sectional view on the AA line of Fig.2 (a). It is a C direction arrow line view of Drawing 2 (a) showing the use state of a vacuum heat insulating material. It is a top view which shows the state which accommodated the hot water storage tank which attached the vacuum heat insulating material in the outer plate. It is a top view which shows the structure which accommodates the hot water storage tank which attached the vacuum heat insulating material of the deformation | transformation form in an outer plate | board.

Explanation of symbols

1 Hot water storage tank 2 Vacuum insulation 2h Heat insulation body (main body)
2a Vacuum insulation 2ah Insulation body (body)
2b Vacuum insulation material 2bh Heat insulation body (main body)
3 Core material 5 Sealing allowance 5a Sealing allowance 5b Sealing allowance 6 Thermal insulation (another thermal insulation)
7a end 7b end 8 outer plate 9 heat insulating material (second heat insulating material)
28a outer plate 28b outer plate c gap

Claims (12)

A heat insulation structure of a hot water storage tank for storing hot water for hot water supply,
A heat insulation structure for a hot water storage tank, characterized in that a vacuum heat insulating material having an end portion where a sealed portion of a welding portion is folded back to the main body side is attached around the hot water storage tank. Around the hot water storage tank, the end of one of the vacuum heat insulating materials and the end of the other vacuum heat insulating material are abutted and the both vacuum heat insulating materials are attached with a gap between the both ends. The heat insulation structure of the hot water storage tank according to claim 1, wherein The heat insulation structure for a hot water storage tank according to claim 1, wherein a vacuum heat insulating material is attached around the hot water storage tank with the ends of the vacuum heat insulating material facing each other with a gap therebetween. The heat insulating structure of the hot water storage tank according to claim 2 or 3, wherein another heat insulating material is attached to a gap between the end portions. A heat insulation structure of a hot water storage tank for storing hot water for hot water supply,
A vacuum insulation attached around the hot water storage tank;
A heat insulation structure for a hot water storage tank, comprising: a second heat insulating material attached to an outer plate covering the hot water storage tank and pressing the vacuum heat insulating material toward the hot water storage tank. A heat insulation structure of a hot water storage tank for storing hot water for hot water supply,
A vacuum insulation attached around the hot water storage tank;
A heat insulation structure for a hot water storage tank, comprising: an outer plate that covers the hot water storage tank and presses the vacuum heat insulating material toward the hot water storage tank. A water heater having a hot water storage tank for storing hot water for hot water supply,
A hot water heater, characterized in that a vacuum heat insulating material having an end portion where a sealed portion of a welding portion is folded back to the main body side is attached around the hot water storage tank. Around the hot water storage tank, the end of one of the vacuum heat insulating materials and the end of the other vacuum heat insulating material are abutted and the both vacuum heat insulating materials are attached with a gap between the both ends. The water heater according to claim 7, wherein The hot water heater according to claim 7, wherein the vacuum heat insulating material is attached around the hot water storage tank with the ends of the vacuum heat insulating material facing each other with a gap therebetween. The water heater according to claim 8 or 9, wherein another heat insulating material is attached to a gap between the end portions. A water heater having a hot water storage tank for storing hot water for hot water supply,
A vacuum insulation attached around the hot water storage tank;
And a second heat insulating material attached to an outer plate covering the hot water storage tank and pressing the vacuum heat insulating material toward the hot water storage tank. A water heater having a hot water storage tank for storing hot water for hot water supply,
A vacuum insulation attached around the hot water storage tank;
A hot water supply apparatus comprising: an outer plate that covers the hot water storage tank and presses the vacuum heat insulating material toward the hot water storage tank.

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