JP2021167685A - Storage type water heater - Google Patents

Abstract

To provide a storage type water heater that allows a worker to easily carry out a process of assembling piping communicating with a hot water storage tank.SOLUTION: The storage type water heater comprises a hot water storage tank, an upper insulation material 21 covering the upper part of the hot water storage tank, a lid insulation material 25 attached to the upper face of the upper insulation material 21, and an upper pipe 50 passing through a gap formed between the upper insulation material 21 and the lid insulation material 25, with one end of the pipe connected to a port 52 disposed on the upper part of the hot water storage tank. The lid insulation material 25 comprises a holder that contacts an object, i.e., either or both of the upper pipe 50 and a first instrument attached to the upper pipe 50 to block the object from moving.SELECTED DRAWING: Figure 2

Description

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

The hot water storage type water heater disclosed in Patent Document 1 below covers the wall-shaped protrusions provided on both side surfaces of the pressure relief valve connected to the pressure relief valve pipe connected to the upper part of the hot water storage tank and the periphery of the hot water storage tank. The heat insulating material is integrally configured, and the pressure relief valve is positioned and fixed without installing new parts.

Japanese Unexamined Patent Publication No. 2010-230190

In the manufacturing process of the hot water storage type water heater, after the step of assembling the heat insulating material covering the hot water storage tank, the step of assembling the piping communicating with the hot water storage tank is carried out. The hot water storage type water heater disclosed in Patent Document 1 has the following problems. When a heat insulating material having a wall-shaped protrusion is attached, the pressure relief valve is positioned and fixed, and the degree of freedom in the position of the pressure relief valve is lost. In that state, if the step of connecting the pressure relief valve pipe to the hot water storage tank or the step of connecting the expansion water discharge pipe to the pressure relief valve is performed, the piping is connected because there is no freedom in the position of the pressure relief valve. Difficult to work. Therefore, there is a possibility that the operator forcibly inserts and connects the pipe. If the pipe is forcibly inserted and connected, the seal member at the pipe connection portion is likely to be damaged or residual stress is likely to be generated in the seal member. As a result, the airtightness of the sealing member deteriorates over time, and water leakage may occur.

The present disclosure has been made in order to solve the above-mentioned problems, and an object of the present disclosure is to provide a hot water storage type water heater capable of easily carrying out a process of assembling a pipe communicating with a hot water storage tank.

The hot water storage type water supply machine according to the present disclosure includes a hot water storage tank, an upper heat insulating material that covers the upper part of the hot water storage tank, a lid heat insulating material attached to the upper surface of the upper heat insulating material, and a port provided at the upper part of the hot water storage tank. Is provided with an upper pipe that passes through a gap formed between the upper insulation and the lid insulation, the lid insulation for the upper pipe and the first device attached to the upper pipe. It has a holding portion that prevents the movement of the object by coming into contact with the object which is one or both of them.

According to the present disclosure, it is possible to provide a hot water storage type water heater that can easily carry out a process of assembling a pipe communicating with a hot water storage tank.

It is a front view which shows the hot water storage type water heater by Embodiment 1. FIG. FIG. 5 is a perspective view of the upper part of the hot water storage type water heater according to the first embodiment as viewed diagonally from the front with the outer case removed. FIG. 5 is a perspective view of the upper part of the hot water storage type water heater according to the first embodiment as viewed diagonally from the front with the outer case removed. It is a perspective view which looked at the lid insulation material from the lower surface side. It is a perspective view which shows the state in the process of removing the lid insulation material from the upper insulation material by sliding the lid insulation material in the front direction with respect to the upper insulation material. FIG. 5 is an exploded perspective view of the upper part of the hot water storage type water heater according to the second embodiment as viewed diagonally from the front with the outer case removed.

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. In the following description, the description of "water" means, in principle, liquid water, and may include low-temperature water to high-temperature hot water.

Embodiment 1.
FIG. 1 is a front view showing a hot water storage type water heater 100 according to the first embodiment. Note that in FIG. 1, the illustration of equipment such as pipes, pumps, valves, heat exchangers, and control boards included in the hot water storage type water heater 100 is omitted.

As shown in FIG. 1, the hot water storage type water heater 100 of the present embodiment includes a hot water storage tank 10. The hot water storage tank 10 in the present embodiment has a cylindrical outer shape. When the hot water storage type water heater 100 is installed, the central axis of the hot water storage tank 10 becomes parallel to the vertical line. In the following description, the direction is specified assuming that the central axis of the hot water storage tank 10 is parallel to the vertical line.

The upper heat insulating material 21 covers at least a part of the upper part of the hot water storage tank 10. In the illustrated example, the upper portion of the hot water storage tank 10 has a hemispherical or bowl-shaped outer surface having a convex outer surface. The upper heat insulating material 21 is made of foamed plastic.

A plurality of residual hot water thermistors 32 are attached to the surface of the body of the hot water storage tank 10 at different heights. The residual hot water thermistor 32 corresponds to a temperature sensor that detects the temperature of hot water in the hot water storage tank 10.

The hot water storage type water heater 100 of the present embodiment further includes a lower heat insulating material 22, a vacuum heat insulating material 23, and a body heat insulating material 24. The lower heat insulating material 22 and the body heat insulating material 24 are made of foamed plastic. The lower heat insulating material 22 covers at least a part of the lower part of the hot water storage tank 10. In the illustrated example, the lower portion of the hot water storage tank 10 has a hemispherical or bowl-shaped outer surface having a convex outer surface. The vacuum heat insulating material 23 covers the circumference of the body of the hot water storage tank 10. The body heat insulating material 24 covers the body of the hot water storage tank 10 from the outside of the vacuum heat insulating material 23. The hot water storage type water heater 100 of the present disclosure may not include the vacuum heat insulating material 23. Further, the lower heat insulating material 22 or the body heat insulating material 24 is not limited to the one made of foamed plastic, and may be, for example, glass wool or the like.

The hot water storage tank 10 is housed in a metal outer case 30 in a state of being covered with the above-mentioned heat insulating material. The bottom plate 31 forms the bottom of the outer case 30. The hot water storage tank 10 is supported on the bottom plate 31 by a plurality of internal legs 40 fixed to the hot water storage tank 10. The hot water storage type water heater 100 is fixed to the base or the floor surface by a plurality of installation legs 41 provided under the bottom plate 31.

The outer shape of the outer case 30 may be a rectangular parallelepiped. The outer case 30 has a removable side plate. In the present embodiment, the front plate forming the front surface of the outer case 30 corresponds to the removable side plate. FIG. 1 shows a state in which the front plate of the outer case 30 is removed. When maintaining the equipment inside the outer case 30, the front plate of the outer case 30 is removed. As shown in the drawing, the entire front plate of the outer case 30 may be removable, or only a part of the front plate of the outer case 30 may be removable.

The hot water storage type water heater 100 may include a water heating means for heating the water in the hot water storage tank 10. The configuration of the water heating means is not particularly limited, and may be, for example, a heat pump type or an electric heater arranged in the hot water storage tank 10.

2 and 3 are perspective views of the upper portion of the hot water storage type water heater 100 according to the first embodiment as viewed diagonally from the front with the outer case 30 removed. As shown in these figures, the hot water storage type water heater 100 includes a lid heat insulating material 25 attached to the upper surface of the upper heat insulating material 21. FIG. 2 shows a state before the lid heat insulating material 25 is attached to the upper heat insulating material 21. FIG. 3 shows a state in which the lid heat insulating material 25 is attached to the upper heat insulating material 21. The lid heat insulating material 25 is made of foamed plastic. In addition, in FIG. 1, the illustration of the lid heat insulating material 25 is omitted.

As shown in FIG. 2, the hot water storage type water heater 100 includes an upper pipe 50 communicating with the hot water storage tank 10 and a relief valve 51 attached to the upper pipe 50. One end of the upper pipe 50 is connected to a port 52 provided in the upper part of the hot water storage tank 10. As shown in FIG. 3, the upper pipe 50 projects out of the upper heat insulating material 21 and the lid heat insulating material 25 through a gap formed between the upper heat insulating material 21 and the lid heat insulating material 25. A relief valve 51 is attached to the protruding portion. The lid heat insulating material 25, the upper pipe 50, and the relief valve 51 are housed in the outer case 30.

When the water in the hot water storage tank 10 is heated and the internal pressure of the hot water storage tank 10 rises beyond the specified value, the relief valve 51 opens and the fluid is discharged, so that the internal pressure of the hot water storage tank 10 exceeds the specified value. Can be prevented. The relief valve 51 corresponds to the first device attached to the upper pipe 50.

The relief valve 51 has a lever 51a. For example, when draining the inside of the hot water storage tank 10, the lever 51a can be operated to forcibly open the relief valve 51 to allow air to enter the hot water storage tank 10. Although not shown, the contractor or the user can operate the lever 51a from the window formed on the front plate of the outer case 30.

A groove 25a is formed on the lower surface of the lid heat insulating material 25. As shown in FIG. 3, when the lid heat insulating material 25 is attached to the upper heat insulating material 21, the upper pipe 50 is fitted into the groove 25a, so that the movement of the upper pipe 50 is prevented. The groove 25a is an example of a holding portion that prevents the upper pipe 50 from moving by coming into contact with the upper pipe 50.

When the lid heat insulating material 25 is attached to the upper heat insulating material 21, the movement of the upper pipe 50 is prevented, so that the movement of the relief valve 51 attached to the upper pipe 50 is prevented. Therefore, since the relief valve 51 can be reliably positioned at an appropriate position, the lever 51a can be reliably operated from the window of the front plate of the outer case 30.

When the lid heat insulating material 25 is removed from the upper heat insulating material 21, the movable range of the upper pipe 50 and the relief valve 51 is expanded as compared with the state where the lid heat insulating material 25 is attached to the upper heat insulating material 21. When the lid heat insulating material 25 is removed from the upper heat insulating material 21, the upper pipe 50 and the relief valve 51 can move, for example, in a direction orthogonal to the longitudinal direction of the upper pipe 50 within a certain range. In the manufacturing process of the hot water storage type water heater 100, after attaching the upper heat insulating material 21 to the hot water storage tank 10, before attaching the lid heat insulating material 25 to the upper heat insulating material 21, the work of connecting the upper pipe 50 to the port 52, or The work of connecting another pipe to the upper pipe 50 or the relief valve 51 is carried out. At that time, since the upper pipe 50 and the relief valve 51 are movable, the operator can easily carry out the pipe connection work without difficulty. Therefore, it is possible to reliably prevent the operator from forcibly inserting and connecting the pipes. For this reason, it is possible to reliably prevent problems such as damage to the seal member of the pipe connection portion due to unreasonable work and occurrence of residual stress due to an excessive load acting on the seal member. As a result, the airtightness of the pipe connection portion by the seal member can be reliably maintained for a long period of time, and the occurrence of water leakage can be reliably suppressed.

As shown in FIG. 2, the hot water storage type water heater 100 further includes an upper pipe 53 communicating with the hot water storage tank 10. One end of the upper pipe 53 is connected to a port 54 provided in the upper part of the hot water storage tank 10. As shown in FIG. 3, the upper pipe 53 projects out of the upper heat insulating material 21 and the lid heat insulating material 25 through a gap formed between the upper heat insulating material 21 and the lid heat insulating material 25. A groove 25b is formed on the lower surface of the lid heat insulating material 25. When the lid heat insulating material 25 is attached to the upper heat insulating material 21, the upper pipe 53 is fitted into the groove 25b, so that the movement of the upper pipe 53 is prevented. The groove 25b is an example of a holding portion that prevents the upper pipe 53 from moving by coming into contact with the upper pipe 53.

When the lid heat insulating material 25 is removed from the upper heat insulating material 21, the movable range of the upper pipe 53 is expanded as compared with the state where the lid heat insulating material 25 is attached to the upper heat insulating material 21. When the lid heat insulating material 25 is removed from the upper heat insulating material 21, the upper pipe 53 can be moved within a certain range in a direction orthogonal to the longitudinal direction of the upper pipe 53, for example. In the manufacturing process of the hot water storage type water heater 100, after attaching the upper heat insulating material 21 to the hot water storage tank 10, before attaching the lid heat insulating material 25 to the upper heat insulating material 21, the work of connecting the upper pipe 53 to the port 54, or The work of connecting another pipe to the upper pipe 53 is carried out. At that time, since the upper pipe 53 is movable, the operator can easily carry out the pipe connection work without difficulty. Therefore, it is possible to reliably prevent the operator from forcibly inserting and connecting the pipes. For this reason, it is possible to reliably prevent problems such as damage to the seal member of the pipe connection portion due to unreasonable work and occurrence of residual stress due to an excessive load acting on the seal member. As a result, the airtightness of the pipe connection portion by the seal member can be reliably maintained for a long period of time, and the occurrence of water leakage can be reliably suppressed.

As shown in FIG. 2, a groove 21a and a groove 21b are formed on the upper surface of the upper heat insulating material 21. The upper pipe 50 is arranged so as to pass through the groove 21a. The upper pipe 53 is arranged so as to pass through the groove 21b. The width of the groove 21a is larger than the outer diameter of the upper pipe 50. The width of the groove 21b is larger than the outer diameter of the upper pipe 53. When the lid heat insulating material 25 is not attached to the upper heat insulating material 21, the upper pipe 50 is movable in the groove 21a, and the upper pipe 53 is movable in the groove 21b. When the lid heat insulating material 25 is attached to the upper heat insulating material 21, the groove 21a and the groove 21b are covered with the lid heat insulating material 25.

In the following description, the horizontal direction toward the front plate inside the outer case 30 is referred to as "front direction". Each of the upper pipe 50 and the upper pipe 53 has a portion extending along the front direction. The portion of the upper pipe 50 and the upper pipe 53 extending along the front direction fits into the groove 25a and the groove 25b.

FIG. 4 is a perspective view of the lid heat insulating material 25 as viewed from the lower surface side. In the following description, the dimension of the groove 25a in the horizontal direction orthogonal to the longitudinal direction of the groove 25a is referred to as the "width" of the groove 25a. Further, inside the groove 25a, the direction from the shallow portion near the lower surface of the lid heat insulating material 25 toward the deep portion deep inside the groove 25a is referred to as the "groove depth direction". The groove depth direction faces vertically upward when the lid heat insulating material 25 is attached to the upper heat insulating material 21. The width of the groove 25a continuously decreases in the groove depth direction. That is, the width of the groove 25a gradually narrows toward the depth of the groove 25a. As a result, the following effects can be obtained. Since the width of the groove 25a is wide in the shallow portion in the groove 25a, the upper pipe 50 can be more reliably and easily inserted into the groove 25a when the lid heat insulating material 25 is attached to the upper heat insulating material 21. Therefore, it is possible to more reliably prevent the lid heat insulating material 25 from floating due to the upper pipe 50 being sandwiched between the lower surface of the lid heat insulating material 25 and the upper surface of the upper heat insulating material 21. Further, since the width of the groove 25a gradually narrows toward the back of the groove 25a, the upper pipe 50 is more reliably fitted into the groove 25a and positioned. Therefore, the upper pipe 50 can be reliably held at an appropriate position. The width of the groove 25b is the same as described above. For example, by providing a rounded R shape or a chamfered shape for the portion shown by the broken line in FIG. 3, the widths of the grooves 25a and 25b are continuously reduced in the groove depth direction. Can be formed.

The upper pipe 50 may be held in a state of being press-fitted into the groove 25a. Further, the upper pipe 53 may be held in a state of being press-fitted into the groove 25b. By doing so, the following effects can be obtained. The upper pipes 50 and 53 can be reliably held at an appropriate position. Since no gap is generated between the upper pipes 50 and 53 and the grooves 25a and 25b, the heat insulating performance is improved. Since the lid heat insulating material 25 is fixed by the frictional force between the upper pipes 50 and 53 and the grooves 25a and 25b, the adhesive tape for fixing the lid heat insulating material 25 can be omitted or simplified, and the assembling property is improved. do.

The hardness of the lid heat insulating material 25 may be lower than the hardness of the upper heat insulating material 21. This "hardness" can be compared, for example, by the value of Young's modulus or compressive modulus. The larger the Young's modulus or compressive modulus, the higher the hardness. When the hardness of the lid heat insulating material 25 is lower than the hardness of the upper heat insulating material 21, the lid heat insulating material 25 is easily elastically deformed when the lid heat insulating material 25 is attached to the upper heat insulating material 21, so that the work becomes easy. Further, the lid heat insulating material 25, which is easily elastically deformed, is brought into close contact with the upper pipes 50 and 53, so that the upper pipes 50 and 53 can be reliably held at appropriate positions.

The lid heat insulating material 25 may be held in a state of being press-fitted into a recess formed in the upper heat insulating material 21. As a result, the adhesive tape or the like for fixing the lid heat insulating material 25 can be omitted or simplified, and the assembling property is improved.

The lid heat insulating material 25 may be made of expanded polystyrene. Since expanded polystyrene is easy to mold even with a complicated structure, it is easy to form a structure of a holding portion such as grooves 25a and 25b.

The upper heat insulating material 21 may be made of polyurethane foam. Polyurethane foam has a lower thermal conductivity than polystyrene foam or glass wool, and has better heat insulating performance. The foamed polyurethane may be what is generally called a rigid urethane foam. Polyurethane foam is less likely to form complex shapes than polystyrene foam. However, since the shape of the upper heat insulating material 21 is not complicated as compared with the lid heat insulating material 25, the upper heat insulating material 21 can be molded even with foamed polyurethane.

As shown in FIG. 4, the grooves 25a and 25b continue straight from the front end portion 25c to the rear end portion 25d of the lid heat insulating material 25. Therefore, the upper pipes 50 and 53 can move relatively in the longitudinal direction in the grooves 25a and 25b. Therefore, the lid heat insulating material 25 can be removed from the upper heat insulating material 21 by sliding the lid heat insulating material 25 in a predetermined direction with respect to the upper heat insulating material 21.

FIG. 5 is a perspective view showing a state in which the lid heat insulating material 25 is being removed from the upper heat insulating material 21 by sliding the lid heat insulating material 25 in the front direction with respect to the upper heat insulating material 21. If the front plate of the outer case 30 is removed during maintenance, the lid heat insulating material 25 can slide in the front direction with respect to the upper heat insulating material 21, so that the lid heat insulating material 25 can be removed. In the present embodiment, the lid heat insulating material 25 can be removed without removing the top plate of the outer case 30.

As shown in FIG. 2, the upper heat insulating material 21 is formed with an opening for exposing the port 52 and an opening for exposing the port 54. Before attaching the lid insulation 25, these exposed parts may be covered with another insulation (not shown). This improves the heat insulating performance. Further, since it is not necessary to form the protrusion for closing the opening on the lid heat insulating material 25, a structure in which the lid heat insulating material 25 can slide in the front direction with respect to the upper heat insulating material 21 can be easily achieved.

In the present embodiment, the grooves 25a and 25b have been described as examples of the holding portions that prevent the upper pipes 50 and 53 from moving, but the configuration of the holding portions in the present disclosure is not limited to the grooves 25a and 25b. For example, the lid heat insulating material 25 may be provided with a convex portion as a holding portion, and the convex portion may be in contact with the upper pipes 50 and 53 to prevent the upper pipes 50 and 53 from moving. Further, when the lid heat insulating material 25 is molded from foamed plastic, the holding portion may be formed by another component integrated by insert molding.

In the present embodiment, the groove 25a as the holding portion is in contact with the upper pipe 50 between the relief valve 51 and the port 52. This is more advantageous in preventing the relief valve 50 from moving. In the present embodiment, an example has been described in which the holding portion in contact with the upper pipe 50 prevents the movement of the relief valve 51 by blocking the movement of the upper pipe 50. Not limited to this example, in the present disclosure, the lid heat insulating material 25 may be formed with a holding portion that prevents the relief valve 51 from moving by coming into contact with the relief valve 51 itself. Further, the lid heat insulating material 25 may be formed with a holding portion in contact with both the upper pipe 50 and the relief valve 51.

Embodiment 2.
Next, the second embodiment will be described with reference to FIG. 6, but the differences from the first embodiment will be mainly described, and the elements common to or corresponding to the above-described elements have the same reference numerals. Is added to simplify or omit the common description. FIG. 6 is an exploded perspective view of the upper part of the hot water storage type water heater 101 according to the second embodiment as viewed diagonally from the front with the outer case 30 removed.

As shown in FIG. 6, the hot water storage type water heater 101 of the present embodiment includes a lid heat insulating material 25A and a lid heat insulating material 25B instead of the lid heat insulating material 25 of the first embodiment. The lid heat insulating material 25A and the lid heat insulating material 25B correspond to the lid heat insulating material 25 divided into two through a cut surface 25e between the grooves 25a and the groove 25b. The lid heat insulating material 25A includes a groove 25a as a holding portion. The lid heat insulating material 25B includes a groove 25b as a holding portion. In the present embodiment, the work of attaching the lid heat insulating material 25A so that the upper pipe 50 fits into the groove 25a and the work of attaching the lid heat insulating material 25B so that the upper pipe 53 fits into the groove 25b. Since it can be separated, the work can be performed more easily and reliably.

10 Hot water storage tank, 21 Upper heat insulating material, 21a groove, 21b groove, 22 Lower heat insulating material, 23 Vacuum heat insulating material, 24 Body heat insulating material, 25 lid heat insulating material, 25A lid heat insulating material, 25B lid heat insulating material, 25a groove, 25b Groove, 25c front end, 25d rear end, 25e cut surface, 30 outer case, 31 bottom plate, 32 residual hot water thermistor, 40 inner leg, 41 installation leg, 50 upper piping, 51 escape valve, 51a lever, 52 port, 53 Upper piping, 54 ports, 100 hot water storage type water heater, 101 hot water storage type water supply machine

Claims (12)

Hot water storage tank and
The upper heat insulating material that covers the upper part of the hot water storage tank and
With the lid insulation attached to the upper surface of the upper insulation,
An upper pipe having one end connected to a port provided in the upper part of the hot water storage tank and passing through a gap formed between the upper heat insulating material and the lid heat insulating material.
With
The lid heat insulating material is a hot water storage type having a holding portion that prevents the movement of the object by coming into contact with the object which is one or both of the upper pipe and the first device attached to the upper pipe. Water heater. The first aspect of claim 1, wherein when the lid heat insulating material is removed from the upper heat insulating material, the movable range of the object is expanded as compared with the state where the lid heat insulating material is attached to the upper heat insulating material. Hot water storage type water heater. The hot water storage type water heater according to claim 1 or 2, wherein the lid heat insulating material includes a groove into which the object is fitted as the holding portion. The hot water storage type water heater according to claim 3, wherein the width of the groove continuously decreases in the depth direction of the groove. The hot water storage type water heater according to claim 3 or 4, wherein the object is held in a state of being press-fitted into the groove. The hot water storage type according to any one of claims 1 to 5, wherein the lid heat insulating material can be removed from the upper heat insulating material by sliding the lid heat insulating material in a predetermined direction with respect to the upper heat insulating material. Insulation machine. Further provided with an outer case for accommodating the hot water storage tank, the upper heat insulating material, the lid heat insulating material, the upper pipe, and the first device.
The outer case has a removable side plate and
Any one of claims 1 to 6, wherein the lid heat insulating material can be removed from the upper heat insulating material by sliding the lid heat insulating material toward the side plate with respect to the upper heat insulating material. Hot water storage type water supply machine described in. The hot water storage type water heater according to any one of claims 1 to 7, further comprising the plurality of the lid heat insulating materials, each of which has the holding portion. The hot water storage type water heater according to any one of claims 1 to 8, wherein the hardness of the lid heat insulating material is lower than the hardness of the upper heat insulating material. The hot water storage type water heater according to any one of claims 1 to 9, wherein the lid heat insulating material is held in a state of being press-fitted into a recess formed in the upper heat insulating material. The hot water storage type water heater according to any one of claims 1 to 10, wherein the lid heat insulating material is made of expanded polystyrene. The hot water storage type water heater according to any one of claims 1 to 11, wherein the holding portion is in contact with the upper pipe between the first device and the port.

Images