JP2015137839A - hot water storage tank unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase a wall thickness dimension of a heat insulating material that surrounds an outer hull of a hot water storage tank to enhance heat retaining performance of hot water stored in the hot water storage tank.SOLUTION: In a hot water storage tank unit including a hot water storage tank 1 for storing hot water and heat insulating materials (an upper heat insulating material 2 and side heat insulating materials 3 and 4) for surrounding an outer hull of the hot water storage tank 1, hollow parts 11 in which at least one end is open are formed in a thick wall part of the heat insulating material (the upper heat insulating material 2), and opening parts of the hollow parts 11 are closed by the closing members (the side heat insulating materials 3 and 4).

Description

  Embodiments of the present invention relate to a hot water storage tank unit constituting, for example, a heat pump water heater.

  Heat pump water heaters use low-cost electricity at night to boil hot water, store the boiled hot water in a hot water storage tank and use it in the daytime, etc. In order to improve the heat retention of the hot water storage tank, Is surrounded by a heat insulating material (see, for example, Patent Document 1 below). As the heat insulating material, a heat insulating material made of foamed resin by a bead foaming method is widely used, and it is formed by placing foamed beads in a mold and heating and foaming. The heat retaining property of the heat insulating material increases as the thickness of the heat insulating material increases.

JP 2012-132615 A

  However, the heat insulating material made of foamed resin increases the time required for heat propagation to the beads inside the thick-walled part in the heating and foaming process and the cooling process as the wall thickness increases, resulting in an increase in processing man-hours. Incurs high manufacturing costs.

  An object of an embodiment of the present invention is to provide a hot water storage tank unit that is inexpensive and can improve the heat retention of the hot water storage tank.

  The hot water storage tank unit of the embodiment is a hot water storage tank unit having a hot water storage tank for storing hot water and a heat insulating material surrounding an outer shell of the hot water storage tank, and a hollow portion having at least one end opened in a thick portion of the heat insulating material is formed. The opening portion of the hollow portion is closed by a closing member.

It is a disassembled perspective view which shows the hot water storage tank unit of 1st Embodiment. It is a perspective view which shows the upper heat insulating material and side part heat insulating material of 2nd Embodiment. It is a longitudinal cross-sectional view which shows the state which couple | bonded the upper heat insulating material and side part heat insulating material of 2nd Embodiment. It is a disassembled perspective view which shows the upper heat insulating material and 1st, 2nd side heat insulating material of the hot water storage tank unit of 3rd Embodiment.

(First embodiment)
The hot water storage tank unit of the first embodiment will be described with reference to FIG. FIG. 1 is an exploded perspective view showing a hot water storage tank unit according to the first embodiment. The hot water storage tank unit includes a hot water storage tank 1 for storing hot water and a heat insulating material surrounding an outer shell of the hot water storage tank 1. . The heat insulating material has an upper heat insulating material 2 surrounding the upper side of the outer shell of the hot water storage tank 1, and side heat insulating materials 3 and 4 surrounding the lower side of the outer shell of the hot water storage tank 1. The heat insulating material is formed by combining the side heat insulating materials 3 and 4. Furthermore, the hot water storage tank unit has a housing for housing the hot water storage tank 1 and the heat insulating material, and this housing combines the top panel 5, the side panels 6, 7, the front panel 8, the back panel 9, and the bottom plate 10. It is formed by doing.

  This hot water storage tank unit is connected to a heating device such as a heat pump unit, for example, stores hot hot water boiled by the heating device above the hot water storage tank 1 which is a sealed tank, and is supplied downward from a water supply or the like. It can store very low temperature water.

  The hot water storage tank 1 is a metal cylinder, and various pipes (not shown) are connected to the hot water storage tank 1. The piping connected to the hot water storage tank 1 includes water supply piping for supplying tap water into the hot water storage tank 1, hot water piping for connecting the hot water storage tank 1 and a heating device (not shown), and hot water storage tank 1. It is a hot water supply pipe that supplies hot water to a hot water use place such as a washroom or a bathtub.

  The upper heat insulating material 2 and the side heat insulating materials 3 and 4 are foamed resin members, and are formed by placing foam beads in a mold and heating and foaming. The side heat insulating materials 3 and 4 are formed in a semi-cylindrical shape that is divided into two parts in the front and rear directions, and these side heat insulating materials 3 and 4 are formed in a cylindrical shape by bringing the side surfaces into contact with each other and joining them. The upper heat insulating material 2 and the side heat insulating materials 3 and 4 are coupled by bringing the lower end surface 2 a of the upper heat insulating material 2 into contact with the upper end surfaces 3 a and 4 a of the side heat insulating materials 3 and 4.

  A plurality of hollow portions 11 are formed in the thick portion of the upper heat insulating material 2. These hollow portions 11 are formed along the mold drawing direction (vertical direction) when the upper heat insulating material 2 is formed using a mold, the upper end portion is closed, and one end on the lower end side is the upper heat insulating portion. It is formed as a vertically long flat elliptic columnar space opened in the lower end surface 2 a of the material 2. Moreover, these hollow parts 11 are formed in the part in which the thickness dimension in the upper heat insulating material 2 is large. Further, these hollow portions 11 are positioned concentrically with respect to the hot water storage tank 1 when the outer wall of the hot water storage tank 1 is surrounded by the heat insulating materials (the upper heat insulating material 2 and the side heat insulating materials 3 and 4). Has been placed. A lid cover 12 made of foamed resin is attached to the upper end portion of the upper heat insulating material 2 and covers pipings connected to the upper part of the hot water storage tank 1.

  When the upper heat insulating material 2 and the side heat insulating materials 3, 4 are joined surrounding the outer shell of the hot water storage tank 1, the lower end surface 2 a of the upper heat insulating material 2 and the upper end surfaces 3 a, 4 a of the side heat insulating materials 3, 4 are The opening portion of the hollow portion 11 is closed by the upper end surfaces 3 a and 4 a of the side heat insulating materials 3 and 4. And the side part heat insulating materials 3 and 4 located adjacent to the upper heat insulating material 2 function as a closing member which closes the opening part of the hollow part 11. FIG. A support base 21 made of foamed resin is provided below the hot water storage tank 1 and the side heat insulating materials 3 and 4. The support base 21 supports the hot water storage tank 1 and the side heat insulating materials 3 and 4 while covering the lower surface of the hot water storage tank 1, and is fixed on the bottom plate 10.

  On the outer peripheral surface of the side heat insulating material 3, uneven portions for arranging various functional parts are formed. As these uneven | corrugated | grooved parts, for example, the convex part 13 which arrange | positions a controller (not shown), the several hole part 14 which arrange | positions the temperature sensor (not shown) which detects the temperature in the hot water storage tank 1, and reheating A recess 15 or the like for arranging a heat exchanger (not shown) is formed.

  In such a configuration, the hot water in the hot water storage tank 1 is boiled by using inexpensive nighttime electric power, and this hot water surrounds the outer wall of the hot water storage tank 1 with the heat insulating materials such as the upper heat insulating material 2, the side heat insulating materials 3, 4 and the like. It is kept warm by surrounding with.

  Here, a plurality of hollow portions 11 are formed in the thick portion of the upper heat insulating material 2. For this reason, in the manufacturing process, when the upper heat insulating material 2 is formed by placing and heating the foam beads in the mold, the heat is transmitted to the foam beads through the portion forming the hollow portion 11 in the mold. Can do. Therefore, even when the thickness of the upper heat insulating material 2 is increased, when foamed beads are foamed, heat can be transferred well to the whole foamed beads, and foaming of foamed beads due to poor heating in the heating process is prevented. can do. In the cooling process, secondary foaming due to poor cooling can be prevented, and deformation of the shape can be prevented. Furthermore, the heating time and the cooling time in the foaming process can be shortened, the productivity can be improved, and the upper heat insulating material 2 having a large wall thickness can be formed while suppressing a rise in manufacturing cost.

  And the heat insulation effect of this upper heat insulating material 2 can be improved by enlarging the thickness dimension of the upper heat insulating material 2, and the heat retention performance of the hot water stored in the hot water storage tank 1 can be improved.

  And since the opening part of the hollow part 11 is closed by the upper end surfaces 3a and 4a of the side part heat insulating materials 3 and 4 located adjacent to the upper heat insulating material 2, inflow of the outside air into the hollow part 11 is prevented. Since the hollow portion 11 also exhibits the heat retaining performance, the heat retaining performance by the upper heat insulating material 2 can be further enhanced.

  In this way, the upper heat insulating material 2 having the hollow portion 11 and having a large thickness is used, and the opening portion of the hollow portion 11 is closed by the side heat insulating materials 3 and 4, and the upper heat insulating material 2 and the side heat insulating material are closed. By surrounding the outer shell of the hot water storage tank 1 with the materials 3 and 4, the heat retaining property of the hot water storage tank 1 can be improved, and it is difficult to cool the hot water in the hot water storage tank 1 and the energy efficiency can be increased.

  Moreover, by forming the hollow portion 11 inside the upper heat insulating material 2, it is possible to reduce the cost by reducing the amount of resin beads used for the outer dimensions of the upper heat insulating material 2, The weight of the upper heat insulating material 2 can be reduced.

  In the first embodiment, as an example of the case where the side heat insulating materials 3 and 4 positioned adjacent to the upper heat insulating material 2 are used as the closing member for closing the opening portion of the hollow portion 11 of the upper heat insulating material 2. As described above, a tape-like member is used as a closing member for closing the opening portion of the hollow portion 11, and this tape-like member is interposed between the upper heat insulating material 2 and the side heat insulating materials 3, 4. Also good.

(Second Embodiment)
A hot water storage tank unit according to a second embodiment will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the same component as the component demonstrated in 1st Embodiment, and the overlapping description is abbreviate | omitted.

  The basic configuration of the hot water storage tank unit of the second embodiment is the same as that of the hot water storage tank unit of the first embodiment, and includes the hot water storage tank 1 and a heat insulating material surrounding the outer shell of the hot water storage tank 1.

  As shown in FIG. 2, the heat insulating material includes an upper heat insulating material 2 that surrounds the upper side of the outer shell of the hot water storage tank 1, and side heat insulating materials 3A and 4A that surround the lower side of the outer shell of the hot water storage tank 1. The upper heat insulating material 2 and the side heat insulating materials 3A and 4A are joined together to form a heat insulating material. The side heat insulating materials 3A and 4A are made of foamed resin similarly to the side heat insulating materials 3 and 4 described in the first embodiment, and are each formed in a semicylindrical shape.

  A plurality of convex portions 16 are formed on the upper end surfaces 3a and 4a of the side heat insulating materials 3A and 4A. These convex portions 16 are formed in a size and a position to be fitted into the opening portion of the hollow portion 11 when the upper heat insulating material 2 and the side heat insulating materials 3A, 4A are joined.

  FIG. 3 is a longitudinal sectional view showing the heat insulating material in a state where the upper heat insulating material 2 and the side heat insulating materials 3A and 4A are combined. In a state where the upper heat insulating material 2 and the side heat insulating materials 3A and 4A are joined, the convex portion 16 is fitted into the opening portion of the hollow portion 11, and the lower end surface 2a of the upper heat insulating material 2 and the side heat insulating materials 3A and 4A. The upper end surfaces 3a and 4a are in contact with each other.

  In such a configuration, since the hollow portion 11 is formed in the thick portion of the upper heat insulating material 2 made of foamed resin, even if the thickness of the upper heat insulating material 2 is increased, foaming of foamed beads may be poorly formed. The upper heat insulating material 2 can be formed without. And the heat insulation effect of this upper heat insulating material 2 can be improved by enlarging the thickness dimension of the upper heat insulating material 2, and the heat retention performance of the hot water stored in the hot water storage tank 1 can be improved.

  When the upper heat insulating material 2 and the side heat insulating materials 3A, 4A are combined, the convex portion 16 is fitted into the opening portion of the hollow portion 11, and the lower end surface 2a of the upper heat insulating material 2 and the side heat insulating material 3A, The opening part of the hollow part 11 is closed by contact | abutting with the upper end surfaces 3a and 4a of 4A. For this reason, the airtightness of the hollow part 11 can be improved, the inflow of outside air into the hollow part 11 can be further prevented, and the heat insulation performance by the upper heat insulating material 2 can be further enhanced.

  Further, by fitting the convex portion 16 into the opening portion of the hollow portion 11, alignment when the upper heat insulating material 2 and the side heat insulating materials 3 </ b> A and 4 </ b> A are coupled can be performed accurately and quickly.

(Third embodiment)
A hot water storage tank unit according to a third embodiment will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the same component as the component demonstrated in 1st, 2nd embodiment, and the overlapping description is abbreviate | omitted.

  The basic configuration of the hot water storage tank unit of the third embodiment is the same as that of the first and second hot water storage tank units, and includes the hot water storage tank 1 and a heat insulating material surrounding the outer shell of the hot water storage tank 1.

  As shown in FIG. 4, the heat insulating material includes an upper heat insulating material 2 that surrounds the upper side of the outer shell of the hot water storage tank 1, a first side heat insulating material 17 that surrounds a lower side of the outer shell of the hot water storage tank 1, Side heat insulating materials 18 and 19, and these upper heat insulating materials 2, the first side heat insulating materials 17, and the second side heat insulating materials 18 and 19 are combined to form a heat insulating material. Yes. Each of the first and second side heat insulating materials 17, 18, and 19 is a foamed resin member.

  The first side heat insulating material 17 is formed in a cylindrical shape, and when the upper heat insulating material 2 and the first side heat insulating material 17 are combined, the upper end surface 17a of the first side heat insulating material 17 is The upper end surface 17 a is in contact with the lower end surface 2 a of the upper heat insulating material 2 and closes the opening portion of the hollow portion 11. And the 1st side part heat insulating material 17 located adjacent to the upper heat insulating material 2 functions as a closing member which closes the opening part of the hollow part 11. As shown in FIG.

  A plurality of convex portions (not shown) similar to the convex portions 16 described in the second embodiment are formed on the upper end surface 17 a of the first side heat insulating material 17. These convex portions are formed at a size and a position to be fitted into the opening portion of the hollow portion 11 when the upper heat insulating material 2 and the first side heat insulating material 17 are combined.

  A plurality of hollow portions 20 are formed in the thick portion of the first side heat insulating material 17. These hollow portions 20 are formed along the mold drawing direction (vertical direction) when the first side heat insulating material 17 is formed using a mold, the upper end portion is closed, and the lower end portion is the first. 1 is opened on the lower end surface 17 b of the side heat insulating material 17. Moreover, these hollow parts 20 are formed in the part where the thickness dimension in the 2nd side part heat insulating material 17 is large. Further, these hollow portions 20 are disposed so as to be concentrically with respect to the hot water storage tank 1 when the outer wall of the hot water storage tank 1 is surrounded by a heat insulating material.

  The second side heat insulating materials 18 and 19 are formed in a semi-cylindrical shape that is divided into two parts in the front and rear directions, and these side heat insulating materials 18 and 19 are formed in a cylindrical shape by bringing the side surfaces into contact and joining. Yes. The first side heat insulating material 17 and the second side heat insulating materials 18 and 19 include a lower end surface 17b of the first side heat insulating material 17 and an upper end surface 18a of the second side heat insulating materials 18 and 19, 19a is contact | abutted and it couple | bonds.

  The opening portion of the hollow portion 20 is in contact with the lower end surface 17b of the first side heat insulating material 17 and the upper end surfaces 18a and 19a of the second side heat insulating materials 18 and 19 to contact the first side heat insulating material. When 17 and the 2nd side part heat insulating materials 18 and 19 are couple | bonded, it closes by the upper end surfaces 18a and 19a. And the 2nd side part heat insulating materials 18 and 19 located adjacent to the 1st side part heat insulating material 17 are functioning as a closing member which closes the opening part of the hollow part 20. As shown in FIG.

  A plurality of convex portions (not shown) similar to the convex portions 16 described in the second embodiment are formed on the upper end surfaces 18a, 19a of the second side heat insulating materials 18, 19. These convex portions are formed in a size and a position to be fitted into the opening portion of the hollow portion 20 when the first side heat insulating material 17 and the second side heat insulating materials 18 and 19 are combined. Yes.

  In such a configuration, in the third embodiment, since the hollow portion 11 is formed in the upper heat insulating material 2 and the hollow portion 20 is formed in the first side heat insulating material 17, the meat in the heat insulating material is formed. The region in which the thickness dimension is increased can be widened to enhance the heat insulating effect by the heat insulating material, and the heat retaining performance of the hot water stored in the hot water storage tank 1 can be further enhanced.

  In addition, in this Embodiment, the case where the heat insulating material was divided | segmented into two of the 1st side part heat insulating material 17 and the 2nd side part heat insulating materials 18 and 19 along the up-down direction was mentioned as an example, and was demonstrated. However, the number of divisions is not limited to two and may be three or more.

  In each embodiment mentioned above, when the opening part of the hollow part 11 formed in the upper heat insulating material 2 is closed by the upper end surfaces 3a and 4a of the side heat insulating materials 3 and 4, and further, the opening part of the hollow part 11 The case where the convex part 16 is fitted is described as an example. However, in addition to such a method, a hollow part is formed in each of the upper heat insulating material 2 and the side heat insulating materials 3 and 4, and a separate piece of rod-shaped member fitted to these hollow portions is provided. May be fitted into the hollow portions of the upper heat insulating material 2 and the side heat insulating materials 3 and 4 to couple them together.

  Moreover, although the hollow part 11 gave and demonstrated as an example the case where it arrange | positions so that it may be located on a concentric circle with respect to the hot water storage tank 1 when enclosing the outline of the hot water storage tank 1 with a heat insulating material, arrangement | positioning of the hollow part 11 is demonstrated. For example, the hollow portion 11 may have a cylindrical shape and may be arranged in a staggered manner on the thick portion of the upper heat insulating material 2.

  As mentioned above, although some embodiment of this invention was described, these embodiment is shown as an example and is not intending limiting the range of invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 ... Hot water storage tank, 2 ... Upper heat insulating material, 3, 4 ... Side part heat insulating material (closing member), 3A, 4A ... Side heat insulating material (closing member), 11 ... Hollow part, 16 ... Convex part

Claims (4)

In a hot water storage tank unit having a hot water storage tank for storing hot water and a heat insulating material surrounding an outer shell of the hot water storage tank,
A hollow part having at least one end opened in the thick part of the heat insulating material is formed,
The hot water storage tank unit, wherein the opening of the hollow portion is closed by a closing member.   The heat insulating material includes an upper heat insulating material that surrounds an upper side of the outer shell of the hot water storage tank, and a side heat insulating material that surrounds a lower side of the outer shell of the hot water storage tank, and the side portion in the thick portion of the upper heat insulating material The said hollow part by which the one end by the side of a heat insulating material was opened is formed, The said side heat insulating material is a closing member which contact | abuts to the said upper heat insulating material, and closes the opening part of the said hollow part. Item 2. A hot water tank unit according to item 1.   The hot water storage tank unit according to claim 1 or 2, wherein the closing member is provided with a convex portion that fits into the hollow portion. The hot water storage tank unit according to any one of claims 1 to 3, wherein the hollow portion is formed along a drawing direction of a mold that forms the heat insulating material.

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