JP2015165182A - Hot water storage water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hot water storage water heater having a heat insulation structure capable of preventing degradation in the transportation efficiency of a heat insulating material, reducing the probability of damage, and improving adhesion to a hot water storage tank.SOLUTION: A hot water storage water heater comprises: a cylindrical hot water storage tank 2 storing hot water; and a heat insulating material 3 serving as a non-vacuum heat insulating material covering a surface of the hot water storage tank 2. The heat insulating material 3 includes a plurality of strip cross-sectional shape parts (first circular arc bodies) 6a each having a circular arc surface along a cylindrical surface of the hot water storage tank 2 as an inner surface; and a plurality of strip cross-sectional shape parts (second circular arc body) 6b each having a circular arc surface wider than the circular arc surface of each of the strip cross-sectional shape parts 6a, and the cross-sectional shape parts 6a and the cross-sectional shape parts 6B are alternately arranged and connected in a short length direction. An inner surface-side slit 5a extending toward an inner surface and an outer surface-side slit 5b extending toward an outer surface are formed in a connection between each cross-sectional shape part 6a and each cross-sectional shape part 6b, and the heat insulating material 3 is disposed to closely attach the circular arc surfaces of the cross-sectional shape parts 6a and 6b to the cylindrical surface of the hot water storage tank 2.

Description

  The present invention relates to a hot water storage type water heater.

  The hot water storage tank unit of the heat pump water heater stores hot water of up to about 90 ° C. For this reason, it is widely known that a vacuum heat insulating material is attached around the hot water storage tank for the purpose of improving the heat retaining performance. However, the vacuum heat insulating material has the characteristic of being easily deteriorated by heat. For this reason, the structure in which the vacuum heat insulating material is directly attached to the hot water storage tank has a problem that the heat insulation performance of the vacuum heat insulating material is deteriorated year by year due to the influence of aging due to heat.

  Therefore, for example, in Patent Document 1, a non-vacuum heat insulating material is provided around a hot water storage tank having a cylindrical shape, and a vacuum heat insulating material curved along the outer peripheral shape of the hot water storage tank is provided outside the non-vacuum heat insulating material. Has been proposed. According to this configuration, since the vacuum heat insulating material is not directly attached to the hot water storage tank, a decrease in thermal conductivity due to thermal deterioration of the vacuum heat insulating material is suppressed. Thereby, the fall of the heat retention performance of a hot water storage tank unit can be prevented, and high heat insulation performance can be maintained.

JP 2010-91134 A

  However, when the non-vacuum heat insulating material (for example, styrofoam) is in close contact with the cylindrical hot water storage tank as in the above-described conventional apparatus, the shape of the non-vacuum heat insulating material is U-shaped along the cylindrical aspect of the hot water storage tank turn into. For this reason, if a non-vacuum heat insulating material having such a shape is used, the transportation efficiency is poor, the thin-walled portion is easily damaged during transportation or mounting in the hot water storage tank, or the hot water storage tank is warped by molding or the like. It had the problem that it did not adhere.

  The present invention has been made in order to solve the above-described problems, and does not deteriorate the transport efficiency of the heat insulating material, reduces the possibility of breakage, and increases the degree of adhesion with the hot water storage tank. An object of the present invention is to provide a hot water storage type water heater having a structure.

  A hot water storage type water heater according to the present invention includes a cylindrical hot water storage tank for storing hot water, and a non-vacuum heat insulating material that covers the surface of the hot water storage tank, and the non-vacuum heat insulating material extends along a cylindrical surface of the hot water storage tank. An arc body having an arc surface on the inner surface, the arc body having a strip-shaped first arc body whose lateral direction is curved in an arc shape, and a strip-shaped second arc body having a wider arc width than the first arc body. Are arranged in an alternating manner in the short-side direction and connected to each other. At the joint between the first arc body and the second arc body, an inner surface side slit extending to the inner surface side of the arc body, and an arc body An outer surface side slit extending to the outer surface side of the hot water storage tank is formed, and the arc surfaces of the first arc body and the second arc body are disposed in close contact with the cylindrical surface of the hot water storage tank.

  According to the present invention, it is possible to obtain a hot water storage type hot water heater having a heat insulating structure capable of suppressing the breakage of the heat insulating material and increasing the adhesion with the hot water storage tank without deteriorating the transport efficiency of the heat insulating material of the hot water storage tank. It becomes possible.

It is a figure for demonstrating the structure of the heat insulating material of the hot water storage tank unit 1 which concerns on this Embodiment. It is a figure for demonstrating the structure of the heat insulating material 3, (a) in the figure shows the perspective view of the heat insulating material 3, (b) has shown CC sectional drawing of the heat insulating material 3, respectively. It is a figure for demonstrating the shape at the time of mounting of the heat insulating material 3, (a) in the figure shows the perspective view of the heat insulating material 3, (b) shows DD sectional drawing of the heat insulating material 3, respectively. ing. It is a figure which shows the stacked state of the heat insulating material 3, (a) in a figure shows the stacked state of the heat insulating material shape | molded in the conventional U shape, (b) in the figure has the slit 5 formed. The stacked state of the heat insulating material of the present embodiment of the present invention is shown respectively. It is a figure for demonstrating the structure of the slit 5 formed in the heat insulating material. It is a figure for demonstrating the modification of the heat insulating material 3, (a) in the figure is a perspective view of the heat insulating material 3 as a modification, (b) is E- of the heat insulating material 3 as a modification. E sectional views are shown respectively. It is a figure for demonstrating the shape at the time of mounting of the heat insulating material 3 as a modification, (a) in the figure is a perspective view of the heat insulating material 3, (b) is FF sectional drawing of the heat insulating material 3. Respectively. It is a figure for demonstrating the operation | movement which mounts the heat insulating material 3 in the hot water storage tank 2. FIG. It is a figure for demonstrating the shape of the lower heat insulating material. It is a figure which expands and shows the vicinity of the lower convex part 8 when the heat insulating material 3 is mounted in the hot water storage tank 2. FIG. It is a figure which shows the three-dimensional perspective view of a hot water storage tank unit at the time of mounting the heat insulating material 3 in the hot water storage tank 2. FIG. It is a figure which expands and shows the heat insulating material both-ends uneven | corrugated shaped part 7 of the heat insulating material 3 of the hot water storage tank unit shown in FIG. It is the figure which looked at the hole 10 for thermistor replacement | exchange provided in the heat insulating material 3 of the hot water storage tank unit shown in FIG. 11 from the front. It is a figure for demonstrating mounting operation | movement in the case of mounting a vacuum heat insulating material in a hot water storage tank unit. FIG. 6 is a lower cross-sectional view in the central axis direction in a state where a vacuum heat insulating material is mounted on the hot water storage tank unit. It is a front view of the hot water storage tank unit which mounted the vacuum heat insulating material. It is a top sectional view of a central axis direction in the state where a vacuum heat insulating material was mounted in a hot water storage tank unit. The three-dimensional perspective view of the conventional hot water storage tank unit 100 (hot water storage type water heater) is shown. It is BB sectional drawing of the conventional hot water storage tank unit. It is AA sectional drawing of the conventional hot water storage tank unit. It is AA sectional drawing which shows the attachment process of the heat insulating material 103 to the hot water storage tank 102. FIG.

  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. Further, the present invention is not limited by this embodiment.

Embodiment 1 FIG.
FIG. 18 shows a three-dimensional perspective view of a conventional hot water storage tank unit 100 (hot water storage type hot water heater). Hereinafter, the heat insulating material structure of the hot water storage tank, which is a characteristic configuration of the present invention, will be described with reference to the AA and BB cross sectional views of the hot water storage tank unit 100 shown in FIG. The hot water storage tank unit 100 includes a hot water storage tank for supplying water to the hot water storage tank, a hot water supply pipe for taking out hot water from the hot water storage tank, water and hot water, and a predetermined temperature. It is equipped with a mixing valve for supplying hot water, a heat source for heating water (electric heater and heat pump unit), etc. In the figure shown below, only the configuration of the hot water storage tank and its heat insulating material is shown. The illustration and detailed description of the piping structure and the like will be omitted.

  FIG. 19 shows a BB cross-sectional view of a conventional hot water storage tank unit, and FIG. 20 shows an AA cross-sectional view of the conventional hot water storage tank unit. As shown in these drawings, the hot water storage tank unit 100 includes a hot water storage tank 102 in which hot hot water (hot water) is stored. The hot water storage tank 102 is formed in a cylindrical shape, and a heat insulating material 103 is in close contact with the side surface of the cylinder. The heat insulating material 103 has a shape obtained by dividing a hollow cylindrical shape in close contact with the cylindrical side surface of the hot water storage tank 102 into a plurality of parts (in the figure, divided into two parts). Is formed by. Further, a vacuum heat insulating material 104 is further provided along the side surface of the heat insulating material 103.

  According to such a structure, since the vacuum heat insulating material 104 does not directly adhere to the hot water storage tank 102, thermal deterioration of the vacuum heat insulating material 104 can be prevented. Thereby, since the fall of the heat retention performance by the fall of the heat conductivity of the vacuum heat insulating material 104 can be suppressed effectively, the hot water storage tank unit 100 provided with the hot water storage tank 102 which can maintain high heat insulation performance for a long period of time is provided. Can do.

  However, the conventional heat insulating material structure described above has the following problems. FIG. 21 is a cross-sectional view taken along line AA showing the process of attaching the heat insulating material 103 to the hot water storage tank 102. As shown in this figure, the heat insulating material 103 has a semi-cylindrical shape formed with a uniform thickness, and is molded using a mold having a shape corresponding to the heat insulating material 103. At this time, in order to foam beads of foamed material such as polystyrene foam used as the heat insulating material 103, the thickness of the foamed material needs to be at least about 10 mm. For this reason, the heat insulating material 103 formed in a semi-cylindrical shape is thin, and has a problem that it is easily damaged during transportation or mounting in a hot water storage tank.

  In addition, the shape of the heat insulating material 103 after molding is U-shaped, which has a problem in that the transport efficiency is deteriorated. Furthermore, when the U-shaped inner part is directed upward when stacking the heat insulating material 103 upward, the stacking may become unstable and load collapse may occur. On the other hand, when the U-shaped inner part is directed downward, the load concentrates on the end of the heat insulating material 103, and the heat insulating material 103 located below may be damaged. Further, if this problem is supplemented with a transportation jig or the like, there is a problem that the jig configuration becomes large and expensive. Furthermore, the thin U-shaped shape such as the heat insulating material 103 is largely deformed (warped) after molding. For this reason, when the curvature of the heat insulating material 103 deviates from that of the hot water storage tank 102, the degree of adhesion to the hot water storage tank 102 is lowered.

  Therefore, in the hot water storage tank unit 1 according to the present embodiment of the present invention, the following heat insulating material structure is adopted in order to solve these problems. FIG. 1 is a view for explaining the structure of a heat insulating material of a hot water storage tank unit 1 (hot water storage type hot water heater) according to the present embodiment. As shown in this figure, in the hot water storage tank unit 1 according to the present embodiment, a foaming molded heat insulating material (non-vacuum) such as polystyrene foam is provided on the cylindrical side surface of the cylindrical hot water storage tank 2 similar to the above-described conventional apparatus. The heat insulating material 3 formed by the heat insulating material is in close contact. Further, an upper heat insulating material 12 and a lower heat insulating material 13 each having a concave portion formed in accordance with the tank shape are provided on the upper surface portion and the bottom surface portion of the hot water storage tank 2, respectively. In addition, the upper heat insulating material 12 and the lower heat insulating material 13 are formed of a foamable molded heat insulating material (non-vacuum heat insulating material) such as foamed polystyrene, similarly to the heat insulating material 3.

  2A and 2B are diagrams for explaining the configuration of the heat insulating material 3. FIG. 2A is a perspective view of the heat insulating material 3, and FIG. 2B is a cross-sectional view taken along the line C-C of the heat insulating material 3. ing. As shown in this figure, the heat insulating material 3 includes a plurality of strip-shaped cross-sections 6 (arc bodies) having an inner surface curved in an arc shape along the cylindrical surface of the hot water storage tank 2 in the short direction. A plurality of 6 are arranged in a short direction and connected to form a substantially flat plate shape. A first slit 5a (inner surface side slit) and a second slit 5b (outer surface side slit) extending along the joint are respectively formed on the inner surface side and the outer surface side of the joint between the cross-sectional shapes 6. Yes. Details of the shape and arrangement of the first slit 5a and the second slit 5b will be described later.

  In addition, the cross-sectional shape portion 6 includes a plurality of cross-sectional shape portions 6a, a single cross-sectional shape portion 6b having a wider arc width than the cross-sectional shape portion 6a, and cross-sectional shape portions 6c arranged at both side edges of the heat insulating material 3. And have. On the side edge portion side of the cross-sectional shape portion 6c, a heat-insulating material both-ends uneven shape portion 7 for fitting with the cross-sectional shape portion 6c that abuts during mounting is formed. The cross-sectional shape portion 6b is provided with a thermistor replacement hole 10 (hole portion) for replacing the thermistor for detecting the water temperature in the hot water storage tank 2. Furthermore, at the lower part in the longitudinal direction of the cross-sectional shape parts 6b and 6c, a lower convex part 8 (fitting part) formed in a protruding shape, and a heat insulating material overlapped in the thickness direction around the surface of the lower convex part 8 The outer peripheral lower convex part 9 (convex part) is provided. In addition, about the structure of the heat insulating material both-ends uneven | corrugated shaped part 7, the lower convex part 8, the heat insulating material outer periphery lower convex shaped part 9, and the thermistor replacement hole 10, a detail is mentioned later.

  3A and 3B are diagrams for explaining the shape of the heat insulating material 3 when it is mounted, in which FIG. 3A is a perspective view of the heat insulating material 3, and FIG. 3B is a DD cross-sectional view of the heat insulating material 3. , Respectively. The heat insulating material 3 is easily curved at a thin portion where the slit 5 is provided. For this reason, as shown in this figure, the heat insulating material 3 is curved in the circumferential direction of the circular arc (that is, the direction in which the groove of the first slit 5a on the inner surface side is closed and the second slit 5b on the outer surface side is opened). An arc surface along the cylindrical surface of the hot water storage tank 2 can be formed on the inner surface side of 3. When the heat insulating material 3 is mounted on the hot water storage tank 2, as shown in FIG. 3, the two heat insulating materials 3 are curved as described above and are brought into close contact with the cylindrical surface. Thereby, the heat insulation performance equivalent to the heat insulating material formed in the semicylindrical shape can be exhibited using the flat heat insulating material 3.

  Moreover, FIG. 4 is a figure which shows the stacked state of the heat insulating material 3, (a) in a figure shows the stacked state of the heat insulating material shape | molded in the conventional U shape, (b) in the figure, The stacked state of the heat insulating material of this embodiment of the present invention in which the slits 5 are formed is shown respectively. As shown in this figure, the heat insulating material 3 of the present embodiment can be stacked on a flat surface, so that the transportation efficiency is improved as compared with the conventional U-shaped heat insulating material, and transportation is also performed. It is also possible to suppress breakage of the thin portion of the heat insulating material 3 at the time.

  In addition, the thing of various structures can be employ | adopted for the slit 5. FIG. FIG. 5 is a view for explaining the configuration of the slits 5 formed in the heat insulating material 3. As for the slit 5 shown to (a) in FIG. 5, the 1st slit 5a is formed shallowly and the 2nd slit 5b is formed deeply. According to such a slit, when the heat insulating material 3 is curved in the circumferential direction, the second slit 5b opens widely, so that the inner surface side of the heat insulating material 3 can be easily deformed into an arc surface. The slit 5 shown in FIG. 5A is formed at a position where the second slit 5b is not opposed to the first slit 5a, that is, a position avoiding a region corresponding to the back of the first slit 5a. Thereby, since the situation where two slits 5a and 5b interfere can be suppressed, a deeper slit can be formed.

  Further, (b) and (c) in FIG. 5 show other examples of the slit 5. In the slit 5 shown in FIG. 5B, the first slit 5a is formed deep and the second slit 5b is formed shallow. According to such a slit, when the heat insulating material 3 is curved in the circumferential direction, the first slit 5a is largely closed, so that the inner surface side of the heat insulating material 3 can be easily deformed into an arc surface. Furthermore, in the slit 5 shown in FIG. 5C, a plurality of second slits 5b (two in the figure) are formed at positions sandwiching the first slit 5a. According to such a slit, when the heat insulating material 3 is curved in the circumferential direction, the plurality of second slits 5b are opened, so that the inner surface side of the heat insulating material 3 can be easily deformed into an arc surface.

  Moreover, in the heat insulating material 3 mentioned above, although the several cross-sectional shape part 6a and the single cross-sectional shape part 6b are connected, these combinations are not limited to the structure mentioned above, For example, a some cross-sectional shape part It is good also as a structure which joins 6a and the some cross-sectional shape part 6b. 6A and 6B are diagrams for explaining a modification of the heat insulating material 3, in which FIG. 6A is a perspective view of the heat insulating material 3 as a modified example, and FIG. 6B is a heat insulating material as a modified example. 3 is a cross-sectional view taken along line EE. FIG. 7 is a diagram for explaining the shape of the heat insulating material 3 as a modified example when mounted, in which (a) is a perspective view of the heat insulating material 3 and (b) is the heat insulating material 3. FF sectional drawing of each is shown. In the heat insulating material 3 shown in FIGS. 6 and 7, the cross-sectional shape portions 6 a and the cross-sectional shape portions 6 b are alternately connected. According to such a configuration, since the number of the slits 5 is reduced, it is easy to manufacture the mold and it is possible to suppress the initial cost of the mold. In addition, by increasing the cross-sectional shape portion 6b having a wide circumferential width, there are few places (slits) to be bent when closely contacting the hot water storage tank 2, so that it is easy to assemble along the outer peripheral shape of the hot water storage tank 2, High heat insulation performance can be maintained by preventing a decrease in heat insulation performance.

  In the hot water storage type hot water supply apparatus according to Embodiment 1 of the present invention, various contrivances are provided for easily and reliably mounting the heat insulating material 3 on the hot water storage tank 2. Hereinafter, these will be described in order.

(Characteristics of the lower projection 8)
First, the feature of the lower convex part 8 formed in the heat insulating material 3 is demonstrated. 8 is a diagram for explaining the operation of mounting the heat insulating material 3 on the hot water storage tank 2, FIG. 9 is a diagram for explaining the shape of the lower heat insulating material 13, and FIG. It is a figure which expands and shows the vicinity of the lower convex part 8 when it mounts in the hot water storage tank 2. FIG. As shown in FIG. 8, the lower convex portion 8 is disposed in the vicinity of the lower convex portion 8 a provided at the lower portion of the cross-sectional shape portion 6 c disposed at the side edge portion of the heat insulating material 3 and the center of the heat insulating material 3. The lower convex part 8b provided in the lower part of the cross-sectional shape part 6b which is provided. Further, as shown in FIG. 10, the lower heat insulating material 13 is provided with a lower heat insulating material concave portion 14 (fitting portion) at a position corresponding to the lower convex portion 8 when the heat insulating material 3 is mounted. The lower convex portion 8b described above is inserted and fixed in the lower heat insulating material concave portion. Moreover, as shown in FIG. 10, the lower convex part 8a is inserted and fixed to the lower heat insulating material concave part 14, after fitting with the adjacent lower convex part 8a which contact | abuts. Thereby, while suppressing the curvature of the edge part of the heat insulating material 3, positioning at the time of an assembly is enabled, and it becomes possible to assemble easily. Moreover, it becomes possible to assemble easily by matching the curvatures of the hot water storage tank 2 and the heat insulating material 3, and it is possible to maintain a high heat insulating performance by preventing a decrease in the heat retaining performance. In addition, the fitting shape of the lower convex part 8 provided in the cross-sectional shape part 6 and the lower heat insulating material recessed part 14 provided in the lower heat insulating material 13 is not limited to what was mentioned above, Various well-known fitting shapes are used. Can be adopted.

(Characteristics of heat insulating material both-ends uneven portion 7 and thermistor replacement hole 10)
11 is a view showing a three-dimensional perspective view of the hot water storage tank unit when the heat insulating material 3 is mounted on the hot water storage tank 2, and FIG. 12 is an uneven shape at both ends of the heat insulating material 3 of the hot water storage tank unit shown in FIG. FIG. 13 is an enlarged view of the portion 7, and FIG. 13 is a view of the thermistor replacement hole 10 provided in the heat insulating material 3 of the hot water storage tank unit shown in FIG. As shown in FIGS. 11 and 12, the heat insulating material both-ends uneven shape portion 7 is fitted to the adjacent heat insulating material both-end uneven shape portion 7. Thereby, it becomes possible to fix a plurality of heat insulating materials 3 reliably. Further, as shown in FIGS. 11 and 13, on the front side of the hot water storage tank 2, five tank water temperature detection thermistors 16 for measuring and controlling the water temperature in the tank are arranged along the tank longitudinal direction. ing. The heat insulating material 3 is provided with a thermistor replacement hole 10 formed of a long hole at a position where the tank water temperature detection thermistor 16 is disposed. According to such a configuration, even when a failure or the like occurs in the tank water temperature detection thermistor 16 and it is necessary to replace it, the thermistor can be easily installed from the front of the hot water storage tank 2 without removing the heat insulating material 3. Exchange can be performed.

In the above-described embodiment, the thermistor replacement hole 10 is composed of two elongated holes. However, if the thermistor can be replaced with the heat insulating material 3 mounted, the shape, arrangement, etc. of the hole are as follows. There is no particular limitation.
(Characteristics of heat insulating material outer peripheral lower convex part 9)
Moreover, in the hot water storage tank unit of the present embodiment, a vacuum heat insulating material is mounted on the outer side of the heat insulating material 3 that is a non-vacuum heat insulating material. FIG. 14 is a view for explaining a mounting operation when a vacuum heat insulating material is mounted on the hot water storage tank unit. FIG. 15 is a lower cross-sectional view in the central axis direction in a state where a vacuum heat insulating material is mounted on the hot water storage tank unit. As shown in FIGS. 2A and 14 described above, a step 9a is formed along the circumferential direction at the upper end of the heat insulating material outer peripheral lower convex portion 9. When mounting the vacuum heat insulating material 4, this step 9a is used as a guide. Specifically, as shown in FIG. 14 and FIG. 15, by mounting the vacuum heat insulating material 4 on the step 9a of the heat insulating material outer peripheral lower convex portion 9 formed in the lower outer periphery of the heat insulating material 3, Positioning during mounting can be easily performed. The lower convex portion is thickened by the heat insulating material outer peripheral lower convex portion 9. Thereby, damage to the heat insulating material lower convex portion 8 can be effectively prevented.

(Features of vacuum insulation 4)
FIG. 16 is a front view of a hot water storage tank unit mounted with a vacuum heat insulating material. FIG. 17 is a top sectional view in the central axis direction in a state where a vacuum heat insulating material is mounted on the hot water storage tank unit. As shown in FIGS. 14 and 15, when the vacuum heat insulating material 4 is mounted on the hot water storage tank 2, the vacuum heat insulating material 4 is arranged so that the upper end surface of the vacuum heat insulating material 4 is lower than the upper part of the heat insulating material 3. The size of is set. Thereby, the vacuum heat insulating material 4 can be fixed to the heat insulating material 3 with the tape 15, and the vacuum heat insulating material 4 can be prevented from coming into direct contact with the hot water storage tank 2. Moreover, since deterioration of the vacuum heat insulating material 4 can be prevented, high heat insulation performance can be maintained.

1 Hot water storage tank unit (hot water storage water heater)
2 Hot water storage tank 3 Insulation (non-vacuum insulation)
4 Vacuum heat insulating material 5 Slit 5a First slit (inner surface side slit)
5b Second slit (outside slit)
6 Cross section (arc)
7 Insulation material both ends uneven shape part (side edge part)
8 Lower convex part (fitting part)
9 Heat-insulating material outer periphery lower convex part (convex part)
10 Thermistor replacement hole 13 Lower heat insulating material 14 Lower heat insulating material recess (fitting part)

Claims (10)

A cylindrical hot water storage tank for storing hot water;
A non-vacuum heat insulating material covering the surface of the hot water storage tank,
The non-vacuum heat insulating material includes an arc body having an arc surface along the cylindrical surface of the hot water storage tank on the inner surface,
The arcuate body has a strip-shaped first arcuate body whose lateral direction is curved in an arcuate shape, and a strip-shaped second arcuate body having a wider arc width than the first arcuate body alternately in the transversal direction. It is composed by connecting several in a row,
An inner surface side slit extending to the inner surface side of the arc body and an outer surface side slit extending to the outer surface side of the arc body are formed at the joint between the first arc body and the second arc body. And
A hot water storage type hot water supply apparatus, wherein the circular arc surface is disposed in close contact with a cylindrical surface of the hot water storage tank.   The hot water storage type hot water heater according to claim 1, wherein the outer surface side slit is provided so as to avoid a position corresponding to a position directly behind the inner surface side slit.   The hot water storage type hot water heater according to claim 1 or 2, wherein the outer surface side slit is provided in the vicinity of a position corresponding to the back of the inner surface side slit.   The hot water storage type hot water supply device according to any one of claims 1 to 3, wherein a plurality of the outer surface side slits are provided with respect to one inner surface side slit.   The hot water storage type hot water heater according to any one of claims 1 to 4, wherein the inner surface side slit is a deeper slit than the outer surface side slit.   The hot water storage type hot water heater according to any one of claims 1 to 4, wherein the inner surface side slit is a shallower slit than the outer surface side slit. The non-vacuum heat insulating material includes a fitting shape at a side edge of the arc body,
The hot water storage system according to any one of claims 1 to 6, wherein when the cylindrical surface of the hot water storage tank is covered by one or a plurality of the circular arc bodies, the abutting side edges are fitted with each other. Water heater.   The non-vacuum heat insulating material includes a lower heat insulating material that covers a lower portion of the hot water storage tank and is in contact with an arc edge portion of the arc body, and a contact portion between the lower heat insulating material and the arc edge portion of the arc body The hot water storage type hot water heater according to any one of claims 1 to 7, further comprising a fitting portion.   The hot water storage type hot water heater according to any one of claims 1 to 8, wherein the non-vacuum heat insulating material includes a hole portion for thermistor replacement in a partial region of the circular arc body. Further comprising a vacuum insulation covering the further outside of the non-vacuum insulation;
The hot water storage type hot water heater according to any one of claims 1 to 9, wherein the non-vacuum heat insulating material is provided with a convex portion for positioning the vacuum heat insulating material on an outer surface of the arcuate body. .

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