JP2021127840A - Hot-water storage type water heater - Google Patents

Abstract

To provide a hot-water storage type water heater which is advantageous in both improving heat-insulation capacity of a hot-water storage tank and enabling an operator to easily check the attached state of a tank leg attached to the hot-water storage tank.SOLUTION: The hot-water storage type water heater comprises a hot-water storage tank 10, a plurality of tank-leg pedestals 20 attached to the hot-water storage tank 10, a plurality of tank legs 30 each attached to the tank-leg pedestals 20 respectively, and a lower heat-insulation material 50 that covers the hot-water storage tank 10 and comprises a plurality of tank-leg insertion sections 50b, i.e., a plurality of openings, each formed on the position of each of the plurality of tank-leg pedestals 20 respectively. The attachment part of the tank-leg pedestals 20 and the tank legs 30 is visible from the tank-leg insertion sections 50b when the lower insulation material 50 is in a state of being attached to the hot-water storage tank 10. A front-leg insulation material 53 and a rear-leg insulation material 54 can be attached to the lower insulation material 50 in a manner of covering the corresponding tank-leg insertion sections 50b respectively.SELECTED DRAWING: Figure 2

Description

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

FIGS. 2 to 4 of Patent Document 1 below discloses a hot water storage type water heater provided with a heat insulating material that covers the hot water storage tank including the attachment portion of the tank leg. The heat insulating material is composed of three blocks divided at the same circumferential position as the three tank legs.

Japanese Unexamined Patent Publication No. 2011-153777

The hot water storage type water heater of Patent Document 1 has a problem that the mounting state of the tank legs cannot be confirmed when the hot water storage tank is equipped with a heat insulating material.

This disclosure has been made to solve the above-mentioned problems, and has both improved the heat retention performance of the hot water storage tank and easily confirming the mounting state of the tank legs attached to the hot water storage tank. The purpose is to provide a hot water storage type water heater that is advantageous in terms of operation.

The hot water storage type water heater according to the present disclosure is a molded heat insulating material that covers a hot water storage tank, a pedestal provided in the hot water storage tank, a tank leg attached to the pedestal, and a hot water storage tank, and an opening is formed at the position of the pedestal. It is a hot water storage type water heater equipped with, and with the molded heat insulating material attached to the hot water storage tank, the attachment part between the pedestal and the tank leg can be visually recognized from the opening, and the molded heat insulating material is the tank leg. It has a tank leg heat insulating wall that covers the outer wall.
Further, the hot water storage type water heater according to the present disclosure is molded by covering the hot water storage tank, the pedestal provided in the hot water storage tank, the tank legs attached to the pedestal, and the hot water storage tank, and an opening is formed at the position of the pedestal. It is a hot water storage type water heater equipped with a heat insulating material, and with the molded heat insulating material attached to the hot water storage tank, the attachment part between the pedestal and the tank leg can be visually recognized from the opening so as to close the opening. It is further provided with a lid heat insulating material that can be attached to the molded heat insulating material.

According to the present disclosure, there is provided a hot water storage type water heater that is advantageous in achieving both improving the heat retention performance of the hot water storage tank and easily checking the attached state of the tank legs attached to the hot water storage tank. It becomes possible.

It is a figure which shows the hot water storage type water heater according to Embodiment 1. FIG. FIG. 5 is an exploded perspective view showing a hot water storage tank provided in the hot water storage type water heater according to the first embodiment and a heat insulating material covering the hot water storage tank. FIG. 5 is a perspective view of the lower heat insulating material according to the first embodiment as viewed diagonally from above. FIG. 5 is a perspective view seen from diagonally above with the lower heat insulating material of the first embodiment turned upside down. FIG. 5 is a perspective view showing a state when the lower heat insulating material according to the first embodiment is assembled to a hot water storage tank. It is a perspective view which shows the state of fastening the tank leg to the tank leg pedestal with a bolt after assembling the lower heat insulating material in Embodiment 1 to a hot water storage tank. FIG. 5 is a perspective view of the rear leg heat insulating material according to the first embodiment as viewed from the radial outer position of the hot water storage tank. FIG. 5 is a perspective view of the rear leg heat insulating material according to the first embodiment as viewed from the inner position in the radial direction of the hot water storage tank. FIG. 5 is a perspective view of a hot water storage tank to which a heat insulating material is attached according to the first embodiment and a part of an exterior body as viewed from the right front side. FIG. 5 is a cross-sectional view taken along the plane A in FIG. 9, which is a plane parallel to the vertical line. It is a horizontal cross-sectional view cut along line BB in FIG. FIG. 5 is a perspective view of the lower heat insulating material according to the second embodiment as viewed diagonally from above. FIG. 5 is a perspective view seen from diagonally above with the lower heat insulating material of the second embodiment turned upside down. It is a perspective view which shows the state of fastening the tank leg to the tank leg pedestal with a bolt after assembling the lower heat insulating material in Embodiment 2 to a hot water storage tank. It is a perspective view which looked at the cover heat insulating material in Embodiment 2 from the outside position in the radial direction of a hot water storage tank. FIG. 5 is a perspective view of a hot water storage tank to which a heat insulating material is attached according to the second embodiment and a part of the exterior body as viewed from the right front side. It is sectional drawing cut by the plane C in FIG. 16 which is the plane parallel to the vertical line. It is a horizontal cross-sectional view cut along the DD line in FIG.

Hereinafter, embodiments will be described with reference to the drawings. The same reference numerals are given to common or corresponding elements in each figure to simplify or omit the description.

Embodiment 1.
FIG. 1 is a diagram showing a hot water storage type water heater according to the first embodiment. As shown in FIG. 1, the hot water storage type water heater 100 according to the first embodiment has a hot water storage unit 1 having a built-in hot water storage tank 10 and a heating means 4 for heating water to generate hot water. The hot water storage unit 1 and the heating means 4 are connected by a water inlet pipe 3 and a hot water outlet pipe 5. Further, the hot water storage unit 1 is connected to a water supply pipe 2 for supplying water from a water source such as an external water supply, a bath hot water supply pipe 6, and a hot water supply pipe 7. The water stored in the hot water storage tank 10 is led out from the lower part of the hot water storage tank 10 and is conveyed to the heating means 4 through the water inlet pipe 3. The heating means 4 is composed of, for example, a heat pump unit that heats water using a refrigeration cycle. The water conveyed to the heating means 4 is heated to become hot water. This high-temperature hot water returns to the hot water storage unit 1 through the hot water outlet pipe 5, flows into the hot water storage tank 10 from the upper part of the hot water storage tank 10, and is stored. Hot water is stored in the hot water storage tank 10 by forming a temperature stratification in which the upper side is high temperature and the lower side is low temperature. The hot water storage unit 1 is provided with a mixing valve for mixing the hot water taken out from the hot water storage tank 10 and the water supplied from the water supply pipe 2 to control the temperature. The hot water whose temperature is controlled by the mixing valve is supplied to the bath tub 110 via the bath hot water supply pipe 6, or is supplied to a hot water supply destination such as a shower, a kitchen, or a faucet in a washroom via a hot water supply pipe 7. NS. The heating means in the present disclosure is not limited to the above-described configuration, and for example, a heating means such as an electric heater may be arranged in the hot water storage tank 10.

The hot water storage unit 1 includes an exterior body 8 that forms an outer shell. The exterior body 8 in the present embodiment has a rectangular parallelepiped shape. The exterior body 8 is made of metal, for example. The hot water storage tank 10 is arranged inside the exterior body 8 in a state of being covered with a heat insulating material described later. A plurality of body legs 9 are installed under the exterior body 8. The hot water storage unit 1 is supported and fixed to the ground or foundation by these body legs 9. Although not shown, various devices such as pipes, pumps, valves, and heat exchangers are arranged inside the exterior body 8. In the following description, as a general rule, the vertical direction is specified based on the posture in which the hot water storage type water heater 100 is installed as shown in FIG.

FIG. 2 is an exploded perspective view showing a hot water storage tank 10 included in the hot water storage type water heater 100 according to the first embodiment and a heat insulating material covering the hot water storage tank 10. FIG. 2 is an exploded view in which the exterior body 8 of the hot water storage unit 1 is removed in order to clarify the arrangement of each heat insulating material. The hot water storage tank 10 is made of a metal such as stainless steel. The hot water storage tank 10 has a cylindrical tank body 10a, an upper end plate 10b, and a lower end plate 10c. The hot water storage tank 10 is installed in a posture in which the central axis of the tank body 10a is parallel to the vertical line. The upper end plate 10b is joined to the upper end portion of the tank body 10a so as to close the opening of the upper end portion. The upper end plate 10b corresponds to the upper part of the hot water storage tank 10. The lower end plate 10c is joined to the lower end of the tank body 10a so as to close the opening of the lower end. The lower end plate 10c corresponds to the lower part of the hot water storage tank 10.

Since the hot water storage tank 10 has a capsule shape as shown in FIG. 2, it is impossible to maintain the standing state by itself. In order to maintain the upright state of the hot water storage tank 10, tank legs 30 are attached to a plurality of locations of the hot water storage tank 10. Since it is necessary for the hot water storage tank 10 to stably support the weight when the water is full over time, in the first embodiment, the tank legs 30 are provided at three positions at equal intervals in the circumferential direction of the lower end plate 10c. Has been done.

Since the inside of the hot water storage tank 10 is filled with hot water, it is not possible to provide holes or the like for attaching other parts except for the water passage port. Therefore, the tank pedestal 20 having a built-in nut is welded to the lower end plate 10c at the position where the tank leg 30 is attached. The tank legs 30 are fastened to the tank leg pedestal 20 by bolts 40. The bolt 40 corresponds to a mounting portion between the tank leg pedestal 20 and the tank leg 30. The tank leg 30 has an outer wall facing outward in the radial direction of the hot water storage tank 10 and an inner wall facing inward in the radial direction of the hot water storage tank 10.

The hot water storage unit 1 of the first embodiment includes a lower heat insulating material 50, a back heat insulating material 51, a front heat insulating material 52, a front leg heat insulating material 53, and a rear leg heat insulating material 54 as heat insulating materials for covering the hot water storage tank 10. And the upper heat insulating material 55 is provided. Each heat insulating material is made of foamed plastic such as foamed polystyrene or foamed polyurethane, and is formed into a predetermined shape covering the hot water storage tank 10. The lower insulating material 50 covers at least a part of the lower end plate 10c. The back heat insulating material 51 covers about half the circumference of the tank body 10a on the back side. The front heat insulating material 52 covers about half the circumference of the tank body 10a on the front side. The upper heat insulating material 55 covers at least a part of the upper end plate 10b.

FIG. 3 is a perspective view of the lower heat insulating material 50 according to the first embodiment as viewed obliquely from above. FIG. 4 is a perspective view of the lower heat insulating material 50 according to the first embodiment, which is turned upside down and viewed from diagonally above. As shown in these figures, the lower heat insulating material 50 is formed based on the bowl-shaped portion 50a having a shape corresponding to the lower end plate 10c. The thickness of the bowl-shaped portion 50a is substantially uniform as a whole. The lower heat insulating material 50 has a tank leg insertion portion 50b. The tank leg insertion portion 50b corresponds to an opening formed at the position of the tank leg pedestal 20. In the illustrated example, the tank leg insertion portion 50b has a shape as if a part of the peripheral wall of the bowl-shaped portion 50a is cut out and removed.

The lower heat insulating material 50 has a tank leg support protrusion 50c that projects downward from the bowl-shaped portion 50a. The tank leg support protrusion 50c is located adjacent to the bottom of the tank leg insertion portion 50b. The tank leg support protrusion 50c has a prismatic shape whose axial direction is parallel to the central axis of the hot water storage tank 10. When the lower heat insulating material 50 and the tank legs 30 are assembled to the hot water storage tank 10, the tank leg support protrusions 50c come into contact with the inner wall of the tank legs 30.

Each of the front leg heat insulating material 53 and the rear leg heat insulating material 54 corresponds to a lid heat insulating material that can be attached to the lower heat insulating material 50 so as to close the tank leg insertion portion 50b. A groove 50d is formed on the inner edge of the tank leg insertion portion 50b in contact with the front leg heat insulating material 53 or the rear leg heat insulating material 54. The groove 50d is used for fixing the front leg heat insulating material 53 or the rear leg heat insulating material 54.

FIG. 5 is a perspective view showing a state when the lower heat insulating material 50 according to the first embodiment is assembled to the hot water storage tank 10. When the lower heat insulating material 50 is assembled to the hot water storage tank 10, the hot water storage tank 10 is supported by an assembly table (not shown) in a posture in which the central axis thereof is horizontal. In that state, the operator assembles the lower heat insulating material 50 to the hot water storage tank 10 by moving the lower heat insulating material 50 in the direction of the central axis of the hot water storage tank 10. At that time, the lower heat insulating material 50 is assembled so that the position of the tank leg insertion portion 50b matches the position of the tank leg pedestal 20. In the present embodiment, the lower heat insulating material 50 is assembled to the hot water storage tank 10 before the tank legs 30 are attached to the tank leg pedestal 20. Therefore, the tank legs 30 do not get in the way when assembling the lower heat insulating material 50 to the hot water storage tank 10, which facilitates the work.

FIG. 6 is a perspective view showing a state in which the lower heat insulating material 50 according to the first embodiment is assembled to the hot water storage tank 10 and then the tank legs 30 are fastened to the tank leg pedestal 20 with bolts 40. When assembling the tank legs 30, the hot water storage tank 10 is rotated around its central axis so that the assembling point is located at the uppermost position on the assembling table. The operator assembles the tank legs 30 by lowering the tank legs 30 toward the tank leg pedestal 20 and the tank leg support protrusions 50c from the outside in the radial direction of the hot water storage tank 10. In the present embodiment, by providing the tank leg support protrusion 50c in contact with the inner wall of the tank leg 30, the stability is good when the tank leg 30 is placed, and the fastening work with the bolt 40 is easy. You get work benefits. In particular, in the present embodiment, the surface of the tank leg pedestal 20 and the surface of the tank leg support protrusion 50c are located on the same surface with the lower heat insulating material 50 attached to the hot water storage tank 10, and the tank leg 30 The inner wall is in contact with both the tank leg pedestal 20 and the tank leg support protrusion 50c. As a result, the stability when the tank leg 30 is placed is further improved.

In the present embodiment, with the lower heat insulating material 50 attached to the hot water storage tank 10, the bolt 40 corresponding to the attachment portion between the tank leg pedestal 20 and the tank leg 30 can be visually recognized from the tank leg insertion portion 50b. Therefore, the mounting state of the tank legs 30 can be confirmed without removing the lower heat insulating material 50. Therefore, the work of confirming the mounting state of the tank legs 30 becomes easy.

FIG. 7 is a perspective view of the rear leg heat insulating material 54 according to the first embodiment as viewed from the radial outer position of the hot water storage tank 10. FIG. 8 is a perspective view of the rear leg heat insulating material 54 according to the first embodiment as viewed from the radial inner position of the hot water storage tank 10. In the present embodiment, the rear leg heat insulating material 54 or the front leg heat insulating material 53 is attached so as to close the tank leg insertion portion 50b, so that the heat of the hot water storage tank 10 is surely leaked from the tank leg insertion portion 50b. Can be suppressed.

The rear leg heat insulating material 54 is attached to the tank leg insertion portions 50b at two locations on the left and right sides of the back surface of the hot water storage unit 1, and the front leg heat insulating material 53 is attached to the tank leg insertion portion 50b at one location on the front side of the hot water storage unit 1. Is installed. The front leg heat insulating material 53 has the same purpose and function as the rear leg heat insulating material 54, although there are slight differences in its dimensions and shape. Therefore, in the following, the rear leg heat insulating material 54 will be described in detail, and the front leg heat insulating material 53 will be omitted in detail.

As shown in FIGS. 7 and 8, the rear leg heat insulating material 54 is formed based on the tank leg heat insulating wall 54a. The thickness of the tank leg heat insulating wall 54a is substantially uniform as a whole. In the following description, a cross section perpendicular to the central axis of the hot water storage tank 10 is referred to as a "horizontal cross section". The tank leg heat insulating wall 54a has a "U" shape in a horizontal cross section. The rear leg heat insulating material 54 has an upper protrusion 54b and a side protrusion 54c. The upper protrusion 54b protrudes from the upper surface of the tank leg heat insulating wall 54a. The side protrusions 54c project from both side surfaces of the tank leg heat insulating wall 54a and come into contact with the inner edge of the tank leg insertion portion 50b. When the rear leg heat insulating material 54 is attached to the tank leg insertion portion 50b, the side protrusion 54c is inserted into the groove 50d. The side protrusion 54c corresponds to an engaging portion that engages with the groove 50d of the lower heat insulating material 50. By engaging the side protrusion 54c with the groove 50d, the rear leg heat insulating material 54 can be reliably fixed at an appropriate position. As shown in FIG. 8, a bolt storage recess 54d is formed on the inner wall of the tank leg heat insulating wall 54a to avoid interference with the head of the bolt 40.

FIG. 9 is a perspective view of the hot water storage tank 10 to which the heat insulating material is attached according to the first embodiment and a part of the exterior body 8 as viewed from the right front side. As shown in FIG. 9, the bottom plate 8a of the exterior body 8 is sandwiched between the upper end of the machine body leg 9 and the lower end of the tank leg 30. The tank legs 30 are located inside the exterior body 8.

FIG. 10 is a cross-sectional view taken along the plane A in FIG. 9, which is a plane parallel to the vertical line. FIG. 11 is a horizontal cross-sectional view taken along the line BB in FIG. As shown in these figures, in the present embodiment, the rear leg heat insulating material 54 is in contact with the outer wall of the tank leg 30, so that cold air can be prevented from coming into contact with the outer wall of the tank leg 30. Therefore, it is possible to more reliably prevent the heat of the hot water storage tank 10 from being dissipated from the outer wall of the tank legs 30. In particular, in the present embodiment, as shown in FIG. 10, the rear leg heat insulating material 54 covers from the upper end to the lower end of the outer wall of the tank leg 30. Therefore, it is further advantageous in preventing the heat of the hot water storage tank 10 from being dissipated from the outer wall of the tank legs 30.

In the present embodiment, the tank leg support protrusion 50c comes into contact with the inner wall of the tank leg 30, so that cold air can be prevented from coming into contact with the inner wall of the tank leg 30. Therefore, it is possible to more reliably prevent the heat of the hot water storage tank 10 from being dissipated from the inner wall of the tank legs 30. In particular, in the present embodiment, the tank leg support projection 50c comes into contact with the inner wall of the tank leg 30 from the position adjacent to the tank leg pedestal 20 to the lower end of the tank leg 30. Therefore, it is further advantageous in preventing the heat of the hot water storage tank 10 from being dissipated from the inner wall of the tank legs 30.

In the present embodiment, when the rear leg heat insulating material 54 is attached, the upper protrusion 54b engages with the lower end surface of the back surface heat insulating material 51, and the side protrusion 54c engages with the groove 50d of the lower heat insulating material 50. do. Further, the lower end of the rear leg heat insulating material 54 is in contact with the bottom plate 8a. The upper protrusion 54b and the side protrusion 54c prevent a gap between the rear leg heat insulating material 54 and the back surface heat insulating material 51 and a gap between the rear leg heat insulating material 54 and the lower heat insulating material 50. Since the degree of adhesion between the heat insulating materials is increased, the heat retention efficiency is further improved. Further, by providing the upper protrusion 54b and the side protrusion 54c, it is possible to more reliably prevent the attached rear leg heat insulating material 54 from falling off.

When the rear leg heat insulating material 54 is attached, the rear leg heat insulating material 54 is press-fitted into the recess formed by the tank leg insertion portion 50b, the lower end surface of the back surface heat insulating material 51, and the bottom plate 8a. , The upper protrusion 54b and the side protrusion 54c are compressed and deformed. In order to enhance the cushioning property at the time of press-fitting, the foaming ratio of the rear leg heat insulating material 54 may be higher than the foaming ratio of the lower heat insulating material 50 or the foaming ratio of the back surface heat insulating material 51.

When manufacturing small heat insulating materials such as the front leg heat insulating material 53 and the rear leg heat insulating material 54, a plurality of small heat insulating materials used for one hot water storage unit 1 are molded at a time with one molding die. You may. In this case, a plurality of small heat insulating materials are connected to each other at the position of the upper protrusion 54b or the side protrusion 54c, and the connecting portion is separated to form the upper protrusion 54b or the side protrusion 54c. May be good. In this way, by molding a plurality of small heat insulating materials at once with one molding die, the cost of the molding die can be kept low, and the cost can be reduced. In addition, since the quantity of a plurality of small heat insulating materials used per product can be managed as a set, there is an advantage that the number of personnel can be easily managed at the production site.

In the illustrated example, in the rear leg heat insulating material 54, the region where the bolt storage recess 54d is formed covers the fastening portion of the bolt 40, so that the heat retention efficiency is further improved. Not limited to the illustrated example, a through hole may be formed instead of the bolt storage recess 54d. When this through hole is formed, the head of the bolt 40 can be visually recognized from the through hole, so that there is an advantage that the tightened state of the bolt 40 can be confirmed with the rear leg heat insulating material 54 attached. .. Since this through hole is small, there is little adverse effect on heat retention efficiency.

Further, the rear leg heat insulating material 54 may be fixed to the lower heat insulating material 50 or the back surface heat insulating material 51 by using a fixing member such as an adhesive tape without providing the upper protrusion 54b and the side protrusion 54c.

Embodiment 2.
Next, the second embodiment will be described with reference to FIGS. 12 to 18, but the differences from the above-described first embodiment will be mainly described, and the same or corresponding parts will be simplified or explained. Omit.

The hot water storage unit 1 of the second embodiment includes a lower heat insulating material 60 instead of the lower heat insulating material 50. FIG. 12 is a perspective view of the lower heat insulating material 60 according to the second embodiment as viewed from diagonally above. FIG. 13 is a perspective view of the lower heat insulating material 60 according to the second embodiment, which is turned upside down and viewed from diagonally above. As shown in these figures, the lower heat insulating material 60 is formed based on the bowl-shaped portion 60a. The tank leg heat insulating wall 60b is formed at a position of the peripheral wall of the bowl-shaped portion 60a facing the mounting position of each tank leg 30. The tank leg heat insulating wall 60b projects outward from the peripheral wall of the bowl-shaped portion 60a. A U-shaped notch 60e is formed in the tank leg heat insulating wall 60b. The U-shaped notch 60e corresponds to an opening formed at the position of the tank leg pedestal 20.

A tank leg insertion hole 60c for passing the tank leg 30 is formed at a position adjacent to the tank leg heat insulating wall 60b. The tank leg insertion hole 60c penetrates the bowl-shaped portion 60a along a direction parallel to the central axis of the hot water storage tank 10. The horizontal cross-sectional shape of the tank leg insertion hole 60c is a "U" shape corresponding to the horizontal cross-sectional shape of the tank leg 30. A tank leg support protrusion 60d that projects downward from the bowl-shaped portion 60a is formed at a position adjacent to the tank leg insertion hole 60c.

The lid heat insulating material 70, which will be described later, can be attached to the lower heat insulating material 60 so as to close the U-shaped notch 60e. A groove 60f is formed on the inner edge of the U-shaped notch 60e in contact with the lid heat insulating material 70. The groove 60f is used for fixing the lid heat insulating material 70.

FIG. 14 is a perspective view showing a state in which the lower heat insulating material 60 according to the second embodiment is assembled to the hot water storage tank 10 and then the tank legs 30 are fastened to the tank leg pedestal 20 with bolts 40. As shown in FIG. 14, the operator assembles the lower heat insulating material 60 to the hot water storage tank 10 so that the position of the U-shaped notch 60e matches the position of the tank leg pedestal 20. After that, the tank leg 30 is inserted into the tank leg insertion hole 60c by sliding the tank leg 30 toward the central axis of the hot water storage tank 10. At this time, since the tank leg 30 is inserted in a state of being covered with the "U" -shaped tank leg 30 on the prism-shaped tank leg support protrusion 60d, the stability is good when the tank leg 30 is inserted, and the fastening work with the bolt 40 is performed. The advantage in assembly work that it is easy to remove can be obtained. Further, in the present embodiment, since the surface of the tank leg pedestal 20 and the surface of the tank leg support protrusion 60d are located on the same surface, the upper end portion of the tank leg 30 inserted into the tank leg insertion hole 60c can be twisted. It can be smoothly guided to the tank leg pedestal 20.

In the present embodiment, with the lower heat insulating material 60 attached to the hot water storage tank 10, the bolt 40 corresponding to the attachment portion between the tank leg pedestal 20 and the tank leg 30 can be visually recognized from the U-shaped notch 60e. Therefore, the mounting state of the tank legs 30 can be confirmed without removing the lower heat insulating material 60. Therefore, the work of confirming the mounting state of the tank legs 30 becomes easy.

FIG. 15 is a perspective view of the lid heat insulating material 70 according to the second embodiment as viewed from the radial outer position of the hot water storage tank 10. As shown in FIG. 15, the lid heat insulating material 70 is formed based on the lid-shaped portion 70a. The lid-shaped portion 70a has an inverted "L" shape when viewed from the tangential direction of the circumference of the hot water storage tank 10. The thickness of the lid-shaped portion 70a is substantially uniform as a whole. The lid heat insulating material 70 has an upper protrusion 70b and a side protrusion 70c. The upper protrusion 70b projects from the upper surface of the lid-shaped portion 70a. The side protrusions 70c project from both side surfaces of the lid-shaped portion 70a and are in contact with the inner edge of the U-shaped notch 60e. The side protrusion 70c corresponds to an engaging portion that engages with the groove 60f of the lower heat insulating material 60. A plurality of recesses 70d are formed on the outer wall of the lid-shaped portion 70a facing outward in the radial direction of the hot water storage tank 10. The recess 70d corresponds to a finger hook portion on which a finger can be hung. When the lid heat insulating material 70 is attached / detached, the work is facilitated by putting a finger on the recess 70d to grip the lid heat insulating material 70. Similar finger hooks may be formed on the front leg heat insulating material 53 and the rear leg heat insulating material 54 of the first embodiment.

FIG. 16 is a perspective view of the hot water storage tank 10 to which the heat insulating material is attached according to the second embodiment and a part of the exterior body 8 as viewed from the right front side. FIG. 17 is a cross-sectional view taken along the plane C in FIG. 16, which is a plane parallel to the vertical line. FIG. 18 is a horizontal cross-sectional view cut along the DD line in FIG. As shown in these figures, in the present embodiment, the tank leg heat insulating wall 60b of the lower heat insulating material 60 covers a part of the outer wall of the tank leg 30 to prevent cold air from coming into contact with the outer wall of the tank leg 30. can. Therefore, it is possible to reliably prevent the heat of the hot water storage tank 10 from being dissipated from the outer wall of the tank legs 30. In particular, in the present embodiment, as shown in FIG. 17, the tank leg heat insulating wall 60b is in contact with the outer wall of the tank leg 30 on the lower side of the bolt 40, and the tank leg heat insulating wall 60b is on the left and right sides of the bolt 40. It touches the outer wall of. Therefore, it is further advantageous in preventing the heat of the hot water storage tank 10 from being dissipated from the outer wall of the tank legs 30. The tank leg heat insulating wall 60b may be formed so as to cover the lower end of the outer wall of the tank leg 30. Further, in the present embodiment, as in the first embodiment, the tank leg support protrusion 60d comes into contact with the inner wall of the tank leg 30, so that the heat of the hot water storage tank 10 is surely dissipated from the inner wall of the tank leg 30. Can be prevented.

In the present embodiment, the lid heat insulating material 70 may not be provided. Even without the lid heat insulating material 70, the tank leg heat insulating wall 60b covers the outer wall of the tank leg 30, so that the heat insulating efficiency can be sufficiently improved. When the lid heat insulating material 70 is omitted, there is an advantage that the work of removing the lid heat insulating material 70 becomes unnecessary when checking the fastened state of the bolt 40. In the present embodiment, the front leg heat insulating material 53 and the rear leg heat insulating material 54 in the first embodiment are not required, which contributes to the reduction of the type and the number of parts of the molded heat insulating material and the reduction of the assembly process. You can get advantages such as.

On the other hand, when the lid heat insulating material 70 that closes the U-shaped notch 60e is provided as in the illustrated example, heat leakage from the U-shaped notch 60e can be prevented, so that the heat retention efficiency is further improved. In the present embodiment, when the lid heat insulating material 70 is attached, the upper protrusion 70b engages with the lower end surface of the back surface heat insulating material 51, and the side protrusion 70c engages with the groove 60f of the lower heat insulating material 60. As a result, the degree of adhesion between the heat insulating materials is increased, so that the heat retention efficiency is further improved. In addition, it is possible to more reliably prevent the press-fitted lid heat insulating material 70 from falling off. The foaming ratio of the lid heat insulating material 70 may be higher than the foaming ratio of the lower heat insulating material 60 or the foaming ratio of the back surface heat insulating material 51 in order to enhance the cushioning property at the time of press fitting.

Further, the lid heat insulating material 70 may be fixed to the lower heat insulating material 60 or the back surface heat insulating material 51 by using a fixing member such as an adhesive tape without providing the upper protrusion 70b and the side protrusion 70c. The lid insulation 70 in the illustrated example is not in contact with the outer wall of the tank leg 30. Not limited to this example, the lid heat insulating material 70 may be configured to be in contact with the outer wall of the tank leg 30.

1 Hot water storage unit, 2 Water supply pipe, 3 Water inlet pipe, 4 Heating means, 5 Hot water outlet pipe, 6 Bath hot water supply pipe, 7 Hot water supply pipe, 8 Exterior body, 8a Bottom plate, 9 Body legs, 10 Hot water storage tank, 10a Tank body, 10b Upper end plate, 10c lower end plate, 20 tank leg pedestal, 30 tank legs, 40 bolts, 50 lower insulation material, 50a bowl shape part, 50b tank leg insertion part, 50c tank leg support protrusion, 50d groove, 51 back insulation material, 52 Front insulation, 53 Front leg insulation, 54 Rear leg insulation, 54a Tank leg insulation wall, 54b Upper protrusion, 54c Side protrusion, 54d Bolt storage recess, 55 Upper insulation, 60 Lower insulation, 60a Bowl shape, 60b tank leg heat insulation wall, 60c tank leg insertion hole, 60d tank leg support protrusion, 60e U-shaped notch, 60f groove, 70 lid insulation, 70a lid shape, 70b top protrusion, 70c side protrusion, 70d recess, 100 hot water storage type water heater, 110 tub

Claims (10)

Hot water storage tank and
The pedestal provided in the hot water storage tank and
The tank legs attached to the pedestal and
A molded heat insulating material that covers the hot water storage tank and has an opening formed at the position of the pedestal.
It is a hot water storage type water heater equipped with
With the molded heat insulating material attached to the hot water storage tank, the attachment portion between the pedestal and the tank leg can be visually recognized from the opening.
The molded heat insulating material is a hot water storage type water heater having a tank leg heat insulating wall that covers the outer wall of the tank leg. The hot water storage type water heater according to claim 1, further comprising a lid heat insulating material that can be attached to the molded heat insulating material so as to close the opening. Hot water storage tank and
The pedestal provided in the hot water storage tank and
The tank legs attached to the pedestal and
A molded heat insulating material that covers the hot water storage tank and has an opening formed at the position of the pedestal.
It is a hot water storage type water heater equipped with
With the molded heat insulating material attached to the hot water storage tank, the attachment portion between the pedestal and the tank leg can be visually recognized from the opening.
A hot water storage type water heater further provided with a lid heat insulating material that can be attached to the molded heat insulating material so as to close the opening. The hot water storage type water heater according to claim 2 or 3, wherein the lid heat insulating material is in contact with the outer wall of the tank leg. The lid insulation has an engaging portion that engages with the molded insulation.
The hot water storage type water heater according to any one of claims 2 to 4, wherein the lid heat insulating material is fixed to the molded heat insulating material by the engaging portion. The molded heat insulating material and the lid heat insulating material are foam heat insulating materials.
The hot water storage type water heater according to any one of claims 2 to 5, wherein the foaming ratio of the lid heat insulating material is higher than the foaming ratio of the molded heat insulating material. The lid insulation has through holes and
2. The hot water storage type water heater described. The hot water storage type water heater according to any one of claims 2 to 7, wherein the lid heat insulating material has a finger hook portion on which a finger can be hung. The hot water storage type water heater according to any one of claims 1 to 8, wherein the molded heat insulating material has a protrusion in contact with the inner wall of the tank leg. The hot water storage type water heater according to claim 9, wherein the surface of the pedestal and the surface of the protrusion are located on the same surface with the molded heat insulating material attached to the hot water storage tank.

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