JP2013217505A - Heat insulating structure of hot water storage type water heater and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively manufacture a heat insulating structure having high heat insulating property using a vacuum heat insulating material and a formed insulating material.SOLUTION: A heat insulating structure 6 constituting a hot water storage tank unit 1 has formed heat insulating materials 7 and a vacuum heat insulating material 8. The formed insulating materials 7 has the first foamed heat insulating material 7A integrally formed in the inner face of the vacuum heat insulating material 8 by filling the inner face side of the vacuum heat insulating material 8 with foamed particle and the second foamed heat insulating material 7B integrally formed in the outer face of the vacuum heat insulating material 8 by filling the outer face side of the vacuum heat insulating material 8 with the foamed particle. Consequently, when forming the heat insulating structure 6, foamable particle with which both the face sides of the vacuum heat insulating material 8 are filled is foamed while coming into close contact with the inner face and the outer face of the vacuum heat insulating material 8 and the first and second foamed heat insulating materials 7A, 7B can be integrally formed. Accordingly, the high performance heat insulating structure 6 with no gap in the formed heat insulating material 7 can be effectively manufactured.

Description

  The present invention relates to a heat insulating structure for a hot water storage type hot water heater provided with a hot water storage tank and a method for manufacturing the same.

  In general, hot water storage tanks of hot water storage hot water stores hot water at a maximum of about 90 ° C, so the conventional technology places vacuum heat insulating materials and other heat insulating materials (molded heat insulating materials, etc.) around the hot water storage tank. And it is set as the structure which improves heat retention performance so that the warm water in a tank may not cool. However, when the vacuum heat insulating material is configured to be in close contact with the hot water storage tank, a gap is likely to be generated between the vacuum heat insulating material and the molded heat insulating material, and heat release performance is reduced due to heat dissipation from the gap. There's a problem.

  For this reason, in the prior art, for example, by performing one-shot molding or multi-stage molding of two or more shots, an integrally molded part in which the vacuum heat insulating material is embedded in the molded heat insulating material is formed, and a gap is generated between them. The structure which prevented, the structure which fills the clearance gap between both with an adhesive agent etc. are proposed (for example, refer patent document 1, 2). Thereby, in the prior art, heat generation is prevented from occurring through the gap, and high heat insulation performance is realized.

JP 2006-118635 A JP 2005-188714 A

  However, in the conventional technology, for example, when the vacuum heat insulating material and the molded heat insulating material are integrally formed by one shot molding, the vacuum heat insulating material and the molded heat insulating material are bonded to the surface of the vacuum heat insulating material so that the gap is bonded without a gap. It is necessary to apply an adhesive in advance. As a result, at the time of manufacturing the heat insulating material, an adhesive coating process is newly added, and there is a problem that manufacturing efficiency is lowered. In addition, when an adhesive is used, foreign matter adheres to the adhesive during the coating process, and thus the vacuum heat insulating material may be damaged during molding, and the yield tends to decrease.

  In addition, when performing one-shot molding, for example, a positioning heat insulating material for positioning the vacuum heat insulating material in a mold is formed in advance, and this positioning heat insulating material is placed on the four sides of the outer periphery of the vacuum heat insulating material. After mounting each, it is necessary to fix the vacuum heat insulating material in the mold. As a result, at the time of manufacturing the heat insulating material, in addition to the work of forming the positioning heat insulating material and the work of attaching them one by one to the four sides of the vacuum heat insulating material, the four sides of the vacuum heat insulating material are placed in one place in the mold. There is a problem that it takes time and labor to perform alignment work one by one. Moreover, in this prior art, there exists a possibility that curvature may arise in a vacuum heat insulating material by the pressure fluctuation in a metal mold | die.

  On the other hand, when performing multi-stage molding of two or more shots, for example, after performing the first shot, it is necessary to slide the mold, so these operations increase the processing time and reduce the manufacturing efficiency. There is a problem of doing.

  The present invention has been made to solve the above-described problems, and can use a vacuum heat insulating material and a molded heat insulating material to efficiently manufacture a heat insulating structure having high heat retention performance. It aims at providing the heat insulation structure of a water heater, and its manufacturing method.

  The heat insulation structure of the hot water storage type hot water heater according to the present invention includes a molded heat insulating material that covers the hot water storage tank for storing hot water from the outside, an inner surface facing the hot water storage tank, and an outer surface that is embedded in the molded heat insulating material. A heat insulating structure of a hot water storage water heater comprising a plate-shaped vacuum heat insulating material, and the molded heat insulating material is integrally formed on the inner surface by filling foamed particles on the inner surface side of the vacuum heat insulating material. The first foamed heat insulating material extending to the outside of the peripheral portion of the vacuum heat insulating material and the outer surface side of the vacuum heat insulating material are integrally formed on the outer surface by filling the foam particles, and the outer periphery of the vacuum heat insulating material And a second foam heat insulating material that is integrally formed with the first foam heat insulating material.

  According to the present invention, at the time of molding the heat insulating structure, the foam particles filled on both sides of the vacuum heat insulating material are foamed in close contact with the inner surface and the outer surface of the vacuum heat insulating material, and the first and second foam heat insulating materials. Can be integrally molded. Thereby, even if it does not use an adhesive agent etc. at the time of shaping | molding, it can suppress that a clearance gap produces between the foaming heat insulating material after shaping | molding, and a vacuum heat insulating material, and can improve the heat retention performance of a heat insulation structure. In addition, the first and second foam heat insulating materials can be integrally molded from both sides of the vacuum heat insulating material, and these foam heat insulating materials support the vacuum heat insulating material in the mold, Can be integrated with vacuum insulation. This eliminates the need for bending of the positioning heat insulating material and the vacuum heat insulating material, so that the heat insulating structure can be efficiently manufactured by one-shot molding.

It is a perspective view which shows the hot water storage tank unit of the hot water storage type water heater by Embodiment 1 of this invention. It is a longitudinal cross-sectional view which shows the state which fractured | ruptured the hot water storage tank unit along the vertical plane P in FIG. It is the external view which looked at the vacuum heat insulating material from the outer peripheral side. In the manufacturing method of the heat insulation structure by Embodiment 1 of this invention, it is a longitudinal cross-sectional view which shows a 1st preparatory process. It is a longitudinal cross-sectional view which shows the state which fills the space in a metal mold | die with a foaming particle in a 2nd preparation process. In a 2nd preparation process, it is a longitudinal cross-sectional view which shows the state which moved the hook to the exterior of the metal mold | die, supporting a vacuum heat insulating material with the foaming particle with which it filled in the metal mold | die. It is a longitudinal cross-sectional view which shows the state which collides two metal mold | dies and implements a formation process. FIG. 4 is an external view of a portion where a vacuum heat insulating material is supported by a hook from the same position as in FIG. 3 in the first preparation step.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The present invention is not limited to the first to third embodiments described below. Moreover, the same code | symbol is attached | subjected to the element which is common in each figure, and the overlapping description is abbreviate | omitted.

Embodiment 1 FIG.
First, Embodiment 1 of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view showing a hot water storage tank unit of a hot water storage type hot water heater according to Embodiment 1 of the present invention. 2 is a longitudinal sectional view showing a state in which the hot water tank unit is broken along a vertical plane P in FIG. The hot water storage type hot water heater boils low temperature water such as city water into high temperature water using a heat source device, stores the high temperature water in the hot water storage tank unit 1, or supplies hot water to an external desired location. In addition to the hot water storage tank unit 1, the hot water storage type hot water heater is a water supply pipe for supplying water to the hot water storage tank unit 1, a hot water supply pipe for taking out high temperature water from the hot water storage tank unit 1, and low temperature water and high temperature water. A mixing valve for supplying hot water at a predetermined temperature, a heat source device (electric heater or heat pump unit) for heating low-temperature water, and the like. In addition, in this Embodiment, since the heat insulation structure of the hot water storage tank unit 1 is demonstrated, illustration and description of another structure are abbreviate | omitted.

  As shown in FIG. 2, the hot water storage tank unit 1 includes an outer case 2, a hot water storage tank 3, an upper heat insulating material 4, a lower heat insulating material 5, a heat insulating structure 6, and the like. The outer case 2 is formed in a box shape by a plurality of panels or the like, and accommodates the hot water storage tank 3, the heat insulating materials 4, 5 and the heat insulating structure 6 inside. The hot water storage tank 3 is formed as a cylindrical sealed tank extending in the vertical direction, and is configured to store high-temperature water heated by a heat source device. Moreover, the heat insulating materials 4 and 5 and the heat insulating structure 6 hold the hot water storage tank 3 in which high-temperature water is stored, and the upper heat insulating material 4 is disposed so as to cover the upper side of the hot water storage tank 3. 5 is arrange | positioned so that the lower part side of the hot water storage tank 3 may be covered.

  The heat insulation structure 6 is formed in, for example, a substantially semi-cylindrical shape, and is configured to cover the entire circumference of the hot water storage tank 3 by combining a plurality of heat insulation structures 6 in a cylindrical shape. The upper end surface of the heat insulating structure 6 is in close contact with the upper heat insulating material 4, and the lower end surface of the heat insulating structure 6 is in close contact with the lower heat insulating material 5. The heat insulating structure 6 is embedded in the molded heat insulating material 7 by means of a substantially semi-cylindrical molded heat insulating material 7 that covers the outer peripheral surface of the hot water storage tank 3 from the outside, and insert molding or the like. And a substantially semi-cylindrical (plate-like) vacuum heat insulating material 8 having an inner peripheral surface (inner surface) and an outer peripheral surface (outer surface) facing the outside.

  The molded heat insulating material 7 is made of, for example, a foam heat insulating material such as a bead method polystyrene foam (EPS) heat insulating material. More specifically, the molded heat insulating material 7 is a first foam heat insulating material integrally formed on the inner peripheral surface of the vacuum heat insulating material 8 by filling the inner peripheral side of the vacuum heat insulating material 8 with foamed particles as will be described later. 7A and a second foam heat insulating material 7B integrally formed on the outer peripheral surface of the vacuum heat insulating material 8 by filling the outer peripheral side of the vacuum heat insulating material 8 with foamed particles. These foam heat insulating materials 7A and 7B are each formed in a substantially semi-cylindrical shape, extend to the outside of the peripheral edge portion of the vacuum heat insulating material 8 in the vertical direction, and are integrally formed with each other outside the vacuum heat insulating material 8. .

  The vacuum heat insulating material 8 has a curved shape along the cylindrical surface of the molded heat insulating material 7, and extends in an arc shape in a state of being embedded between the foam heat insulating materials 7A and 7B. Further, as shown in FIGS. 2 and 3, the vacuum heat insulating material 8 includes, for example, a core material 8A formed by processing foam, powder, fiber, or the like into a sheet shape (plate shape), and a core material. And two gas barrier films 8B arranged with 8A interposed therebetween. Here, FIG. 3 is an external view of the vacuum heat insulating material viewed from the outer peripheral side. The gas barrier film 8B is formed of a plastic film, a plastic metal laminate film, or the like, and has gas barrier properties.

  As shown in FIG. 3, the frame-shaped portions surrounding the core material 8A in each gas barrier film 8B are thermally welded together to form a frame-shaped welded portion 8C. Thereby, the core material 8A is sealed between the two gas barrier films 8B inside the frame-shaped welded portion 8C, and is kept in a reduced pressure state close to a vacuum. Further, the frame-shaped welded portion 8C projects in a flange shape from the peripheral edge of the core material 8A over the entire circumference. Furthermore, the non-welding peripheral part 8D which was located in the outer side of the frame-shaped welding part 8C and was hold | maintained in the non-welding state is provided in the upper end part (peripheral part) of each gas barrier film 8B. The non-welding peripheral edge 8D constitutes a part that can safely hold the vacuum heat insulating material 8 without destroying the sealed state of the core material 8A.

  According to the said structure, at the time of manufacture of the heat insulation structure 6, filling the foam particle to the inner peripheral side and outer peripheral side of the vacuum heat insulating material 8, respectively, and forming the 1st, 2nd foam heat insulating materials 7A and 7B integrally. Can do. Thereby, the following effects can be obtained as compared with the prior art. First, the problems of the prior art will be described. In the prior art, for example, when the heat insulating material is formed by one shot molding, the foam particles filled in the mold are transferred from the inner peripheral side of the vacuum heat insulating material 8 to the outer peripheral side (or It is necessary to bend the frame-shaped welded portion 8C of the vacuum heat insulating material 8 in advance so that it can easily go from the outer peripheral side to the inner peripheral side. As a result, the working time increases by the amount of bending, and the manufacturing efficiency decreases. Further, if the vacuum heat insulating material 8 is damaged during bending, a slow leak or the like due to perforation occurs, and there is a problem that the heat insulating structure 6 becomes a defective product.

  In the prior art, when the heat insulating material is formed, it is necessary to apply an adhesive in advance on both sides of the vacuum heat insulating material in order to bring the formed heat insulating material and the vacuum heat insulating material into close contact with each other. This coating process also increases work time and decreases manufacturing efficiency. Moreover, if a foreign substance adheres to the applied adhesive, the vacuum heat insulating material may be damaged. Further, during the molding of the prior art, in order to hold the vacuum heat insulating material 8 in a floating state in the mold, positioning heat insulating materials previously formed are respectively attached to the four sides of the outer periphery of the vacuum heat insulating material 8. An operation for positioning the vacuum heat insulating material 8 in the mold is required. In this case, there is a problem that it takes time and labor to form and attach the positioning heat insulating material and to position the vacuum heat insulating material 8. On the other hand, when performing multi-stage molding of two or more shots, for example, it is necessary to slide the mold after executing the first one shot, so that the working time increases and the manufacturing efficiency decreases.

  On the other hand, in the present embodiment, the foam particles filled on both sides of the vacuum heat insulating material 8 are foamed in close contact with the inner peripheral surface and the outer peripheral surface of the vacuum heat insulating material 8, and the first and second The foam heat insulating materials 7A and 7B can be integrally formed. Thereby, without using an adhesive or the like at the time of molding, the formation of a gap between the foamed heat insulating materials 7A, 7B and the vacuum heat insulating material 8 after molding is suppressed, and the heat insulation performance of the heat insulating structure 6 is improved. Can be made.

  Moreover, in the present embodiment, the foam heat insulating materials 7A and 7B can be abutted from both sides of the frame-shaped welded portion 8C of the vacuum heat insulating material 8 and integrally molded. That is, since the foamed particles are discharged from the mold corresponding to both the inner peripheral side and the outer peripheral side of the vacuum heat insulating material 8 at the time of molding, the vacuum heat insulating material 8 is changed from the inner peripheral side to the outer peripheral side (and from the outer peripheral side to the inner peripheral side). ), The bending work of the frame-shaped welded portion 8C can be omitted to reduce the labor of processing, and damage to the vacuum heat insulating material 8 can be prevented. Further, at the time of molding, the vacuum heat insulating material 8 can be held in a predetermined position in the mold by the foam particles filled on the inner peripheral side and the outer peripheral side of the vacuum heat insulating material 8 respectively. Accordingly, the vacuum heat insulating material 8 can be embedded at a specified position in the molded heat insulating material 7 without using the positioning heat insulating material of the prior art, and the warpage of the vacuum heat insulating material 8 can be suppressed. it can. Therefore, according to the present embodiment, the heat insulating structure 6 can be efficiently manufactured by one-shot molding.

  Moreover, in this Embodiment, the non-welding peripheral part 8D is provided in the outer side of the frame-shaped welding part 8C of the vacuum heat insulating material 8. FIG. Thereby, the following effects can be obtained. Generally, when the vacuum heat insulating material 8 has a hole in the gas barrier film 8B and the internal reduced pressure state is impaired, the heat insulating performance is greatly deteriorated. For this reason, it is necessary to pay close attention not to damage the gas barrier film 8B at the time of manufacture or the like, and handling is difficult. On the other hand, since the non-welding peripheral edge 8D is a part that does not affect the sealed state in the film even if it is damaged, the vacuum heat insulating material 8 can be obtained by gripping the non-welding peripheral edge 8D when the heat insulating structure 6 is manufactured. Can be easily supported and moved. Thereby, the work efficiency at the time of handling the vacuum heat insulating material 8 can be improved, and generation | occurrence | production of inferior goods (slow leak etc.) can be suppressed.

  In the present embodiment, the first and second foam heat insulating materials 7A and 7B may be formed of different types of foam materials. Specifically, the first foam heat insulating material 7A may be formed using a foam material having higher heat resistance than the second foam heat insulating material 7B. Thereby, the heat resistance of the internal peripheral part near the hot water storage tank 3 among the shaping | molding heat insulating materials 7 can be improved, and the durability of the heat insulation structure 6 can be improved.

  Further, the first foam heat insulating material 7A may be formed using a foam material having a lower expansion ratio (low magnification) than that of the second foam heat insulating material 7B. In general, a foam heat insulating material has a characteristic that heat insulation performance is improved and strength is increased and hardened as the expansion ratio is lower. Therefore, according to the present configuration, the foamed heat insulating material 7A having a low magnification and high heat insulating property is used for the inner peripheral portion close to the hot water storage tank 3 in the molded heat insulating material 7, and the outer peripheral portion facing the outside of the molded heat insulating material 7. The foam heat insulating material 7B having high elasticity and high elasticity can be used. Thereby, the heat insulation structure 6 which is easy to absorb the impact from the outside etc. can be formed, implement | achieving high heat retention performance.

  Next, the manufacturing method of the heat insulation structure 6 by this Embodiment is demonstrated, referring FIG. 4 thru | or FIG. In the present embodiment, using a mold 20 (core mold) and a mold 21 (cavity mold) for molding the molded heat insulating material 7, the following first preparation process, second preparation process, and The heat insulating structure 6 is manufactured by sequentially performing the molding process. The molds 20 and 21 are formed in a substantially semi-cylindrical shape similarly to the molded heat insulating material 7, and each include a plurality (or a single number) of foamed particle filling ports 22.

  FIG. 4 is a longitudinal sectional view showing the first preparation process. In the first preparation step, first, the molds 20 and 21 are arranged with a gap S provided therebetween. Next, the vacuum heat insulating material 8 is disposed in the space between the molds 20 and 21 from the gap S while supporting (gripping) the non-welding peripheral edge portion 8D of the vacuum heat insulating material 8 by the hook 23 as a support member. At this time, both sides of the vacuum heat insulating material 8 are held at positions away from the inner wall surfaces of the molds 20 and 21, respectively. In addition, the holding position of the vacuum heat insulating material 8 by the hook 23 is shown in FIG. FIG. 8 is an external view of a portion where the vacuum heat insulating material is supported by the hook as seen from the same position as in FIG. Thus, since the hook 23 grips the non-welding peripheral edge portion 8D of the vacuum heat insulating material 8, even if the non-welding peripheral edge portion 8D is damaged by this gripping operation, the sealed state of the vacuum heat insulating material 8 is impaired. Can be prevented. Therefore, the generation of defective products due to the destruction of the sealed state can be suppressed, and the yield during manufacturing can be improved. The vacuum heat insulating material 8 may be held by a plurality of hooks 23.

  Next, FIG.5 and FIG.6 is a longitudinal cross-sectional view which shows a 2nd preparatory process. In the second preparation step, first, as shown in FIG. 5, foamed particles (foamed beads) 24 </ b> A and 24 </ b> B are filled into the space between the molds 20 and 21 from the foamed particle filling port 22. At this time, the foam particles 24 </ b> A are filled into the inner peripheral side of the vacuum heat insulating material 8 from the foamed particle filling port 22 of the mold 20, and the foamed particle filling port 22 of the mold 21 is filled into the outer peripheral side of the vacuum heat insulating material 8. To fill the expanded particles 24B. At this time, by performing the filling operation of the foam particles 24A and the filling operation of the foam particles 24B at the same pressure at the same time, the inclination of the vacuum heat insulating material 8 inside the molds 20, 21 (molded heat insulating material 7) is corrected, Both side surfaces of the vacuum heat insulating material 8 can be arranged in parallel to the inner wall surfaces of the molds 20 and 21. Moreover, the position of the vacuum heat insulating material 8 inside the molded heat insulating material 7 can be adjusted as necessary by making a difference in the filling timing and filling pressure of the foam particles 24A and 24B.

  As the filling amount of the expanded particles 24A and 24B is increased, the vacuum heat insulating material 8 is supported (positioned) from both sides by the expanded particles 24A and 24B as shown in FIG. Is removed from the vacuum heat insulating material 8 and moved to the outside of the molds 20 and 21. In the present embodiment, two foamed particle filling ports 22 provided in the molds 20 and 21 are illustrated. However, in the present invention, a plurality of foamed particle filling ports 22 are provided on the molds 20 and 21. It is good also as a structure arrange | positioned along with the axial direction and the circumferential direction (the up-down direction in FIG. According to this configuration, the foam particles 24A and 24B can be uniformly filled over almost the entire inner wall surfaces of the molds 20 and 21, and the vacuum heat insulating material 8 can be stably supported by the foam particles 24A and 24B. it can.

  Further, the expanded particle filling port 22 of the mold 20 and the expanded particle filling port 22 of the mold 21 have the same distance from the expanded particle filling port 22 to the frame-shaped welded portion 8 </ b> C of the vacuum heat insulating material 8. It is preferable to arrange in the above. As a result, the foam particles 24A and 24B filled from the respective foam particle filling ports 22 can be integrally produced by contacting (colliding) with each other at the position of the frame-shaped weld portion 8C. Therefore, it is possible to suppress the generation of a gap in the molded heat insulating material 7 near the end of the vacuum heat insulating material 8 without bending the frame-shaped welded portion 8C.

  Next, FIG. 7 is a longitudinal sectional view showing the molding process. In the molding step, the molds 20 and 21 are brought into contact with each other and the gap S is closed while the filling of the expanded particles 24A and 24B is continued. As a result, the foam particles 24A and 24B are compressed in the molds 20 and 21 to be brought into close contact with the vacuum heat insulating material 8, and the gap between the foam particles 24A and 24B and the vacuum heat insulating material 8 is eliminated. In this state, the foamed particles 24 </ b> A and 24 </ b> B are foamed to integrally form the first foam heat insulating material 7 </ b> A on the inner peripheral surface of the vacuum heat insulating material 8, and the second foam heat insulating material 7 </ b> B is formed on the vacuum heat insulating material 8. The molded heat insulating material 7 is completed by integrally forming the outer peripheral surface and integrally forming the foam heat insulating materials 7A and 7B outside the vacuum heat insulating material 8.

  According to the manufacturing method, in the first preparation step, the vacuum heat insulating material 8 can be supported at the specified positions in the molds 20 and 21 using the hooks 23. In the second preparation step, the hooks 23 can be removed while supporting the vacuum heat insulating material 8 from both sides by the foam particles 24A and 24B filled on the inner and outer peripheral sides of the vacuum heat insulating material 8, respectively. Thereby, the vacuum heat insulating material 8 can be embedded at a specified position in the molded heat insulating material 7 without using a positioning heat insulating material or the like. Further, in the molding step, the foam particles 24A and 24B are foamed in close contact with the inner peripheral surface and the outer peripheral surface of the vacuum heat insulating material 8, respectively, and the foam heat insulating materials 7A and 7B and the vacuum heat insulating material 8 have a gap between them. It can be integrally formed in a state without any. This eliminates the need for using an adhesive or bending the frame-shaped welded portion 8C, thereby simplifying the manufacturing process. Therefore, the high-performance heat insulating structure 6 can be efficiently manufactured by one-shot molding.

  Further, in the second preparation step, as described above, based on the balance between the filling timing and / or the filling pressure of the foam particles to be filled on the inner peripheral side and the outer peripheral side of the vacuum heat insulating material 8, The position and inclination of the vacuum heat insulating material 8 inside can be adjusted. Thereby, even when using one-shot molding, the positional relationship between the molded heat insulating material 7 and the vacuum heat insulating material 8 can be set accurately and easily, and the heat retaining performance of the heat insulating structure 6 can be stabilized.

DESCRIPTION OF SYMBOLS 1 Hot water storage tank unit 2 Outer case 3 Hot water storage tank 4 Upper heat insulating material 5 Lower heat insulating material 6 Heat insulating structure 7 Molding heat insulating material 7A 1st foam heat insulating material 7B 2nd foam heat insulating material 8 Vacuum heat insulating material 8A Core material 8B Gas barrier property Film 8C Frame-like welded portion 8D Non-welded peripheral edge 20, 21 Mold 22 Foamed particle filling port 23 Hook (supporting member)
24A, 24B expanded particles

Claims (7)

Molded insulation that covers the hot water storage tank that stores hot water from the outside,
A plate-like vacuum heat insulating material embedded in the molded heat insulating material and having an inner surface facing the hot water storage tank and an outer surface facing the outside;
A heat insulation structure for a hot water storage water heater comprising
The molded insulation is
A first foam heat insulating material that is integrally formed with the inner surface by filling foam particles on the inner surface side of the vacuum heat insulating material, and extends to the outside of the peripheral edge of the vacuum heat insulating material;
Filled with foam particles on the outer surface side of the vacuum heat insulating material, is integrally formed with the outer surface, extends to the outside of the peripheral edge of the vacuum heat insulating material, and is integrally formed with the first foam heat insulating material. Foam insulation of
Heat insulation structure for hot water storage water heaters equipped with   The vacuum heat insulating material is formed by welding two gas barrier films sandwiching a plate-shaped core material, and the peripheral edge of each gas barrier film is located outside the welded portion. The heat insulation structure of the hot water storage type hot-water supply device according to claim 1, wherein a non-welding peripheral edge portion held in a welding state is provided.   The heat insulation structure of a hot water storage type hot water supply apparatus according to claim 1 or 2, wherein the first and second foam heat insulating materials are formed using different types of foam materials.   The heat insulation structure of a hot water storage type hot water heater according to claim 1 or 2, wherein the first foam heat insulating material is formed using a foam material having a lower magnification than the second foam heat insulating material. A molded heat insulating material that covers a hot water storage tank that stores hot water from the outside, and a plate-shaped vacuum heat insulating material that is embedded inside the molded heat insulating material and has an inner surface facing the hot water storage tank and an outer surface facing the outside. A method of manufacturing a heat insulation structure for a hot water storage hot water heater,
A first preparatory step of arranging the vacuum heat insulating material in a space between the molds while supporting the vacuum heat insulating material with a support member in a state where a gap is provided between the two molds for forming the molded heat insulating material;
Foam particles are filled from the foam particle discharge port provided in each mold in the space between the molds at positions on the inner surface side and outer surface side of the vacuum heat insulating material, and the vacuum heat insulating material is double-sided by the foam particles. A second preparatory step in which the support member is removed from the vacuum heat insulating material and moved to the outside of the mold while being supported from the side;
A first foam heat insulating material located on the inner surface side of the vacuum heat insulating material and an outer surface of the vacuum heat insulating material by foaming the foamed particles in a state where the two molds are abutted to compress the foamed particles A molding step of integrally molding the second foam insulation material located on the side to complete the molded insulation material;
For manufacturing a heat insulating structure of a hot water storage type hot water heater provided with   6. The hot water storage type hot water supply according to claim 5, wherein in the first preparation step, a non-welding peripheral edge provided at a peripheral edge of two gas barrier films constituting the vacuum heat insulating material is supported by the support member. Method for manufacturing a heat insulating structure of a machine.   In the second preparation step, based on the balance of filling timing and / or filling pressure of the foam particles filling the inner surface side and the outer surface side of the vacuum heat insulating material, the vacuum heat insulating material inside the molded heat insulating material. The manufacturing method of the heat insulation structure of the hot water storage type water heater of Claim 5 or 6 formed by adjusting a position and inclination.

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