JP5549630B2 - Hot water storage tank unit and water heater - Google Patents

Description

  The present invention relates to a technology for preventing a hot water storage tank unit and a water heater from being deformed by an impact during transportation or installation.

  In the conventional hot water storage tank unit, hot water enters and exits from the upper side of the hot water storage tank. And the unheated water is introduced from the lower side of the hot water storage tank, and the inside of the storage tank is always filled. For this reason, there is always hot water in the upper part of the hot water storage tank, and the temperature is high. Therefore, it is important to prevent heat dissipation loss especially from the upper part of the hot water storage tank.

  Therefore, for example, in the hot water storage tank unit described in Patent Document 1, at least the heat insulating material on the upper part of the hot water storage tank is formed as a heat insulating material, and the vacuum heat insulating material is disposed in close contact with the upper part of the thinned heat insulating material. doing. Heat dissipation loss is prevented by not contacting the hot water storage tank upper part with the molded heat insulating material and the vacuum heat insulating material.

Japanese Patent Laying-Open No. 2009-92306 (FIG. 1)

  The conventional hot water storage tank unit has a problem that deformation due to strain occurs because the outer case formed of a thin plate is weak when an impact due to dropping is applied during transportation or installation.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a hot water storage tank unit that does not deform even when an impact is applied to the outer case during transportation or installation.

A hot water storage tank unit according to the present invention is disposed between a hot water storage tank that stores heated hot water, a heat insulating material that insulates at least the upper part of the hot water storage tank, an outer case that covers the heat insulating material, and the outer case and the heat insulating material. One end abuts on the outer case, the other end is joined to the heat insulating material, and the support member partially supports the outer case with the heat insulating material. The support member has low rigidity from the outer case to the heat insulating material. A low-rigid body and a highly rigid high-rigid body are provided in series, and at least one end of the support member is configured by either a low-rigid body or a high-rigid body, and the outer case covers the top plate and the side that cover the top. consists of a side plate, the support member is disposed between the heat insulating member and the side plate, one end abutting said side plate and the other end Ru are bonded to the insulation.

  According to the present invention, the support member has a low-rigid body and a high-rigid body in series, absorbs the dimensional error between the heat insulating material and the outer case with the low-rigid body, and causes a shock due to a drop in the high-rigid body. Since the load or the like is supported, the hot water tank unit can be prevented from being deformed regardless of some dimensional errors inside the hot water tank unit.

It is sectional drawing of the hot water storage tank unit which concerns on Embodiment 1 of this invention. 1 is a schematic perspective view of a hot water storage tank unit according to Embodiment 1 of the present invention. It is sectional drawing which shows the structure of the supporting member which concerns on Embodiment 1 of this invention. It is an expanded sectional view which shows the fitting structure of the supporting member and molded heat insulating material which concern on Embodiment 1 of this invention. It is a block diagram which shows the case where there is no dimensional error between the outer case top plate and molded heat insulating material which concern on Embodiment 1 of this invention. FIG. 6 is a load-displacement diagram of each member in the case of FIG. 5. It is a block diagram which shows the case where the dimensional error between the outer case top plate and molded heat insulating material which concerns on Embodiment 1 of this invention is plus. FIG. 8 is a load-displacement diagram of each member in the case of FIG. 7. It is a block diagram which shows the case where the dimensional error between the outer case top plate and molded heat insulating material which concerns on Embodiment 1 of this invention is a minus. FIG. 10 is a load-displacement diagram of each member in the case of FIG. 9. It is sectional drawing which shows the structure which has a long hole part in the supporting member which concerns on Embodiment 1 of this invention. It is sectional drawing which shows the structure which has a hollow part in the supporting member which concerns on Embodiment 1 of this invention. It is sectional drawing which shows the structure which has several trapezoidal teeth in the supporting member which concerns on Embodiment 1 of this invention. It is a top sectional view of a hot water storage tank unit according to Embodiment 2 of the present invention. It is an expanded sectional view which shows the fitting structure of the supporting member and molded heat insulating material which concern on Embodiment 2 of this invention. It is the figure which combined the supporting member which concerns on Embodiment 2 of this invention, and the supporting member which concerns on Embodiment 1. FIG. It is a top sectional view of a hot water storage tank unit according to Embodiment 3 of the present invention. It is an expanded sectional view which shows the fitting structure of the supporting member and molded heat insulating material which concern on Embodiment 3 of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Embodiment 1 FIG.
FIG. 1 is a cross-sectional view of a water heater according to the first embodiment.
FIG. 2 is a schematic perspective view of the hot water storage tank unit according to the first embodiment.
The hot water storage tank unit 100 according to the present embodiment is surrounded on the outer periphery by an outer shell case 200 including the outer case top plate 11 and the outer case side plate 10 and the bottom plate 9. The hot water storage tank unit 100 includes a hot water storage tank 1, a molded heat insulating material 7, a tank leg 8, and a support member 13 inside. The hot water storage tank unit 100 is connected to the heating means 4 through the water inlet pipe 3 and the hot water outlet pipe 5.

  In the hot water storage tank unit 100 shown in FIGS. 1 and 2, the hot water storage tank 1 has a substantially cylindrical shape. A water supply pipe 2 is connected to the lower part of the hot water storage tank 1. Water is supplied into the hot water storage tank 1 through the water supply pipe 2. One end of the incoming water pipe 3 is connected to the lower part of the hot water storage tank 1, and the other end is connected to the heating means 4. One end of the hot water piping 5 is connected to the heating means 4, and the other end is connected to the upper part of the hot water storage tank 1. A hot water supply pipe 6 is connected to the upper part of the hot water storage tank 1.

  The water supplied from the water supply pipe 2 into the hot water storage tank 1 is conveyed to the heating means 4 through the water inlet pipe 3. The heating means 4 includes a compressor that compresses refrigerant, a heat exchanger for boiling corresponding to a radiator, an expansion valve, an evaporator, and a circulation pipe that connects these in an annular shape (see FIG. (Not shown) and operate under the control of the control device to function as a heat source machine. In the above refrigeration cycle section, a refrigerant such as carbon dioxide is compressed by a compressor to become a high temperature and high pressure, then dissipated heat by a heat exchanger for boiling, depressurized by an expansion valve, and absorbed by an evaporator to be in a gas state And is sucked into the compressor.

  The water conveyed to the heating means 4 is heated by the heating means 4 and then conveyed from the heating means 4 through the hot water piping 5 into the hot water storage tank 1 and stored. Hot water stored in the hot water storage tank 1 passes through a hot water supply pipe 6 and is supplied to a hot water supply terminal such as a bath tub, shower, kitchen or washroom faucet. The hot water storage tank 1 is always kept in a full state by supplying water from the water supply pipe 2.

  The hot water storage tank 1 is covered with a molded heat insulating material 7 molded into a predetermined shape in order to prevent heat radiation to the internal space of the hot water storage tank unit 100. The molded heat insulating material 7 is preferably made of, for example, foamed polystyrene or a material having a heat insulating performance higher than that.

  In the configuration of FIG. 1, the molded heat insulating material 7 is molded in a shape that covers and covers the entire hot water storage tank 1, but the molded heat insulating material 7 only needs to cover at least the upper part of the hot water storage tank 1. Of course, another heat insulating material such as a vacuum heat insulating material may be used instead of the expanded polystyrene. Here, the vacuum heat insulating material is a heat insulating material in which a core material having a porous structure is covered with a laminate film and then the inside is decompressed and sealed.

  The hot water storage tank 1 is supported by a plurality of tank legs 8. The upper end of the tank leg 8 is fixed to the lower part of the hot water storage tank 1 by fastening parts such as bolts. The lower end of the tank leg 8 is fixed on the metal bottom plate 9 by fastening parts such as bolts.

  The hot water storage tank 1 covered with the molded heat insulating material 7 is covered with a metal outer case 200 through a space. The outer case 200 of the first embodiment has a box shape (cuboid shape) as a whole. The outer case 200 includes an outer case side plate 10 that surrounds the side of the hot water storage tank 1 covered with the molded heat insulating material 7, and an outer case top plate 11 that covers the upper portion of the hot water storage tank 1 covered with the molded heat insulating material 7. have.

  The outer case side plate 10 and the outer case top plate 11 are fastened by fastening parts such as screws. The lower part of the outer case side plate 10 is fastened to the bottom plate 9 by fastening parts such as screws. As shown in FIG. 2, a front lower portion of the outer case side plate 10 has a cutout portion 10 a that is generally cut out of a part of a quadrangle in order to attach a piping member.

  A plurality of tank unit legs 12 are installed below the bottom plate 9, and these tank unit legs 12 support the entire hot water storage tank unit 100.

  The molded heat insulating material 7 is installed so as to be in close contact with the hot water storage tank 1 in order to suppress the heat radiation amount from the hot water storage tank 1 as much as possible. Further, spaces (gap) are provided between the molded heat insulating material 7 and the outer case side plate 10 and between the molded heat insulating material 7 and the outer case top plate 11 so that they do not directly contact each other. Thereby, the heat conduction from the hot water storage tank 1 to the outer case 200 can be suppressed, and the heat retaining performance can be enhanced.

  By the way, the hot water storage tank 1 and the outer case side plate 10 have some dimensional errors. Further, although the hot water storage tank 1 and the bottom plate 9 are connected via the tank legs 8, a dimensional error occurs during assembly. It is conceivable that a dimensional error of about stipulated dimension ± 2 mm occurs between the molded heat insulating material 7 covering the upper part of the hot water storage tank 1 and the outer case top plate 11 due to these accumulations.

  Here, a case where an impact such as a drop is applied to the hot water storage tank unit 100 during transportation or installation will be described. When the hot water storage tank unit 100 falls, the tank leg 12 contacts the ground or the like, and the hot water storage tank unit 100 stops suddenly. The outer case 100 continues to descend due to inertia and tends to continue downward by the gap between the molded heat insulating material 7 and the outer case top plate 11. The force that continues to fall acts on the notch 10a in a concentrated manner, causing the outer case side plate 10 to undergo plastic deformation. Therefore, in the present embodiment, the support member 13 is provided inside the outer case 200 and between the outer case top plate 11 and the molded heat insulating material 7 covering the hot water storage tank 1.

  The support member 13 has a compression characteristic in which a high-rigid body and a low-rigid body are connected in series. In other words, the support member 13 has a high rigidity portion and a low rigidity portion in series. Further, the low rigidity body of the support member 13 is formed shorter than the high rigidity body. The high-rigidity body is intended to reduce impact such as dropping by compressing and deforming, and the low-rigidity body is mainly intended to absorb and adjust the dimensional error described above, although it also slightly reduces the impact.

  One end (lower end) of the support member 13 is joined to the upper surface of the molded heat insulating material 7, and the other end (upper surface) of the support member 13 is in contact with the lower surface (back surface) of the outer case top plate 11. As a result, the support member 13 maintains the distance between the molded heat insulating material 7 and the outer case top plate 11. The support member 13 may be a single member that has an annular shape when viewed from above, or a plurality of support members 13 are arranged at intervals in the circumferential direction of the hot water storage tank 1. It may be. Moreover, it is good also as a structure like the beam which makes the supporting member 13 extend with respect to the edge | side which the outer case top plate 11 opposes.

FIG. 3 is an enlarged cross-sectional view of the structure of the support member 13 of the present invention.
In FIG. 3, the upper part of the support member 13 is constituted by a high foam molding material 17 as a low rigidity body, and the lower part is constituted by a low foam molding material 18 as a high rigidity body.

  Styrene, urethane, polyethylene or the like can be used as the material of the foam molding material. Even if the same material is used, by changing the foaming ratio at the time of molding, it is possible to arbitrarily design the level of rigidity, for example, low rigidity for high foaming and high rigidity for low foaming. .

  The support member 13 and the molded heat insulating material 7 may be bonded by an adhesive or the like. Alternatively, as shown in FIG. 4, a concave fitting portion 7a is provided on the upper shoulder of the molded heat insulating material 7, and the support member The lower part of 13 may be fitted.

  Next, the role of the support member 13 will be described. Hereinafter, the role of the support member 13 when there is no dimensional error between the molded heat insulating material 7 and the outer case top plate 11, when the dimensional error is positive, and when the dimensional error is negative will be described.

First, a case where there is no dimensional error between the molded heat insulating material 7 and the outer case top plate 11 will be described.
FIG. 5 is a configuration diagram showing a case where there is no dimensional error between the outer case top plate 11 and the molded heat insulating material 7.
FIG. 6 is a load-displacement diagram of each member in FIG. The vertical axis represents the load, and the horizontal axis represents the displacement.

  In FIG. 6, a solid line indicates the support member 13, a broken line indicates the outer case side plate 10, and a two-dot chain line indicates the relationship between the load and displacement acting on the hot water storage tank unit 100. Here, the relationship between the load acting on the hot water storage tank unit 100 and the displacement is a combination of the support member 13 and the outer case side plate 10. The load acting between the hot water storage tank 1 and the outer case top plate 11 is determined by the relationship between the load of the support member 13 and the displacement.

  First, a case where a load is applied to the outer case side plate 10 without the support member 13 will be described. The outer case side plate 10 undergoes plastic deformation when a load exceeding the yield point Pmax, which is the limit stress in the elastic deformation region, acts. At this time, stress tends to concentrate on the notch 10a provided for pipe attachment. According to the strength test result in which a compressive load was applied to the outer case side plate 10, the yield point Pmax was approximately 8000 N.

  Next, the case where the support member 13 is provided will be described. As shown in FIG. 5, when the support member 13 is assembled, a part of the low-rigid body in the support member 13 is displaced to generate a small compressive load, so that the outer case top plate 11 is connected to the support member 13. The hot water storage tank is in contact with the molded heat insulating material 7.

  That is, the outer case top plate 11 acts as an initial load by pressing downward against the hot water storage tank 1 via the support member 13. The initial load is P0. When the support member 13 is assembled, the molded heat insulating material 7 is pushed downward with a force corresponding to the initial load P0. From the load-displacement characteristic of the low-rigid body of the support member 13, the initial load is about 300N.

As shown in FIG. 5, when the support member 13 is provided between the outer case top plate 11 and the molded heat insulating material 7 covering the upper part of the hot water storage tank 1, the outer case 200 has an elastic limit of 8000 N as the elastic limit of the outer case side plate 10. When a similar compressive load is applied, the compressive load is distributed to the outer side plate 10 and the support member 13. At this time, the support member 13 is first compressed and displaced by the low-rigid body. The load with respect to the displacement of the low-rigid body gradually increases, and the low-rigid body is completely compressed at about 500 N. Thereafter, the support member 13 is displaced by the load-displacement characteristic of the high-rigidity body.
That is, since the load applied to the outer case side plate 10 is distributed to a load sufficiently lower than the yield point 8000N by providing the support member 13, the plastic deformation of the outer case side plate 10 can be suppressed.
In this way, when the tank leg 12 of the hot water storage tank unit 100 that has dropped during transportation or installation contacts the floor or the ground and the downward movement of the hot water storage tank 1 stops suddenly, the outer case 200 is supported by the support member 13. That is, the outer case side plate 10 and the outer case top plate 11 can be further lowered by the support member 13 and the stress applied to the outer case side plate 10 can be relieved. Can be suppressed.

  Further, since the initial load when assembling the support member 13 is about 300 N, the outer case side plate 10 can be pushed down with a simple device, for example, a pressing device using the lever principle or with human power, and can be assembled easily. Can do.

  Second, the case where the dimensional error between the molded heat insulating material 7 and the outer case top plate 11 is more positive than the prescribed dimension will be described.

  FIG. 7 is a configuration diagram showing a state in which a dimensional error between the molded heat insulating material 7 and the outer case top plate 11 is positive. In addition, the dimension error is positive when, for example, if the specified dimension between the molded heat insulating material 7 and the outer case top plate 11 is x, the dimension is about x + 2 mm.

  Even during assembly when the dimensional error is positive as shown in FIG. 7, a part of the low-rigid body in the support member 13 is displaced, and the outer case top plate 11 passes through the support member 13 and the molded heat insulating material 7. The force that presses the hot water storage tank 1 downward acts as the initial load P1. This is because the support member 13 is molded in advance larger than the prescribed dimension between the molded heat insulating material 7 and the outer case top plate 11 in order to absorb a dimensional error due to the collapse of the low-rigid body.

  Therefore, as in the case where there is no dimensional error, a part of the low-rigid body is displaced, and an initial load P1 of about 100 N is generated. The support member 13 is assembled by pushing down the outer case side plate 10 with a force corresponding to the initial load P1.

FIG. 8 is a load-displacement diagram of each member in FIG. The vertical axis represents the load, and the horizontal axis represents the displacement.
In the figure, a solid line indicates the support member 13, a broken line indicates the outer case side plate 10, and a two-dot chain line indicates the relationship between the load and displacement acting on the hot water storage tank unit 100. Here, the relationship between the load acting on the hot water storage tank unit 100 and the displacement is a combination of the support member 13 and the outer case side plate 10.

  The relationship between the load and displacement acting on the hot water storage tank unit 100 in the figure is less than the initial load as compared with the case without the dimensional error shown in FIG. The apparent rigidity of the sliding hot water storage tank unit 100 is low.

  Here, a case where an impact such as a drop is applied to the hot water storage tank unit 100 during transportation or installation will be considered. The case where there is no support member 13 is the same as the case where there is no dimensional variation, and thus the description thereof is omitted.

  Further, when the support member 13 does not have a low-rigidity body, that is, is composed of only a high-rigidity body for impact relaxation, the dimensions of the support member 13 are defined between the molded heat insulating material 7 and the outer case top plate 11. It is thought that it is made to become a size. Therefore, if a dimensional error between the molded heat insulating material 7 and the outer case top plate 11 is positive, a gap is generated between the support member 13 and the outer case top plate 11, and if a load is applied in this state, the support is supported. The member 13 may not support the outer case 200 and the outer case side plate 10 may be deformed.

  However, when the support member 13 having a low-rigidity body is provided, the support member 13 is molded to be larger than the dimension between the molded heat insulating material 7 and the outer case top plate 11, so that when the dimensional error is positive, However, a part of the low-rigid body in the support member 13 is displaced, that is, the support member 13 maintains the distance between the molded heat insulating material 7 and the outer case top plate 11 and no gap is generated, so that the compressive load is dispersed. The Therefore, since the load applied to the outer case side plate 10 is distributed to a load sufficiently lower than the yield point 8000N of the outer case side plate 10, plastic deformation of the outer case side plate 10 can be suppressed.

  In addition, since the initial load when assembling the support member 13 is about 100 N, it is easy to push down the outer case side plate 10 with a simple device such as a pressing device using the lever principle or with a force of human power. Can be assembled into.

  Third, the case where the dimensional error between the molded heat insulating material 7 and the outer case top plate 11 is negative will be described.

  FIG. 9 is a configuration diagram showing a state in which the dimensional error between the molded heat insulating material 7 and the outer case top plate 11 is negative. In addition, the dimension error is minus, for example, when the specified dimension between the molded heat insulating material 7 and the outer case top plate 11 is x, the dimension is about x-2 mm.

  As shown in FIG. 9, at the time of assembly, the outer case top plate 11 acts as an initial load due to the downward pressing force against the hot water storage tank 1, and the initial load is P2. The outer case side plate 10 is pushed down with a force corresponding to the initial load P2 and assembled. From the load-displacement characteristics of the low rigidity body of the support member 13, the initial load P2 is about 500N.

FIG. 10 is a load-displacement diagram of each member in FIG. The vertical axis represents the load, and the horizontal axis represents the displacement.
In the figure, a solid line indicates the support member 13, a broken line indicates the outer case side plate 10, and a two-dot chain line indicates the relationship between the load and displacement acting on the hot water storage tank unit 100. Here, the relationship between the load and displacement actually acting on the hot water storage tank unit 100 is a combination of the support member 13 and the outer case side plate 10.

  The load acting between the hot water storage tank 1 and the outer case top plate 11 is a relationship between the load of the support member 13 and the displacement, and the low-rigid body has already been deformed and buckled. A load is acting.

  The load-displacement acting on the hot water storage tank unit 100 is higher in apparent rigidity by the amount that the load-displacement diagram of the support member 13 slides to the left as compared with the case where there is no dimensional error shown in FIG. ing.

  Here, a case where an impact such as a drop is applied to the hot water storage tank unit 100 during transportation or installation will be considered. Since the case where there is no support member 13 has been described above, it will be omitted.

Moreover, when the support member 13 does not have a low-rigid body, it is considered that the size of the support member 13 is made to be a specified size between the molded heat insulating material 7 and the outer case top plate 11. Therefore, if the dimensional error between the molded heat insulating material 7 and the outer case top plate 11 is negative, the high rigidity body in the support member 13 when the support member 13 is installed between the molded heat insulating material 7 and the outer case top plate 11. Therefore, the initial load becomes too large due to compression deformation only, and there is a possibility that the hot water storage tank unit 100 cannot be assembled by a simple pressing device or human power at the time of assembly work for pushing down the outer case side plate 10 downward.

However, when the support member 13 having a low-rigidity body is provided, the hot-water storage tank unit 100 can be easily assembled because the low-rigidity body collapses to absorb a dimensional error. Even when the dimensional error is negative, the initial load can be reduced, and since the load is supported by a highly rigid body, the outer case is distributed to a load sufficiently lower than 8000 N, which is the yield point of the outer case side plate 10. Plastic deformation of the side plate 10 can be suppressed.
In this way, when the tank leg 12 of the hot water storage tank unit 100 that has dropped during transportation or installation contacts the floor or the ground and the downward movement of the hot water storage tank 1 stops suddenly, the outer case 200 is supported by the support member 13. That is, the outer case side plate 10 and the outer case top plate 11 can be further lowered by the support member 13 and the stress applied to the outer case side plate 10 can be relieved. Can be suppressed.

  In addition, since the initial load when assembling the support member 13 is about 500 N, it is easy to push down the outer case side plate 10 with a simple device such as a pressing device using the lever principle or with a force of human power. Can be assembled.

  As described above, according to the embodiment of the present invention, when an impact load due to dropping is applied to the hot water storage tank unit 100, the built-in hot water storage tank 1 is protected and the outer case side plate 10 itself is damaged or buckled. A structure capable of both preventing deformation can be obtained. As a result, it is possible to suppress wasteful use of resources associated with replacement of the outer case 200 due to poor appearance or replacement due to a malfunction of the hot water storage tank 1. In general, in order to improve the impact resistance, it is necessary to form the outer case 200 with a thick material or to use a large amount of packaging material for transportation. Transportation costs can be reduced.

  Further, since the support member 13 has in series a high-rigidity body that reduces the impact and a low-rigidity body that adjusts the dimensional error, a part of the low-rigidity body in the support member 13 is displaced during assembly, and the hot water storage tank unit While absorbing the dimensional error of 100 and the outer case, it supports a load caused by an impact at the time of dropping with a highly rigid body. Accordingly, when an impact such as a drop is applied to the hot water storage tank unit 100 during transportation or installation, plastic deformation of the outer case 200 can be prevented regardless of the dimensional error of the space portion of the hot water storage tank unit 100. Furthermore, even if a dimensional error occurs when assembling the hot water storage tank unit 100, the hot water storage tank unit 100 can be assembled without processing the support member 13, so that the assemblability is improved.

  Further, since only the upper surface of the support member 13 is in contact with the back surface of the outer case top plate 11, the contact area is smaller than when the upper surface of the molded heat insulating material 7 and the outer case top plate 11 are in direct contact. Therefore, it is possible to further suppress the heat from the upper part of the hot water storage tank 1 from escaping to the outer case 200, and to improve the heat insulation performance of the hot water.

  Further, by using foamed molding material for the support member 13 for both the high-rigidity body and the low-rigidity body, impact such as dropping is directly transmitted to the hot water storage tank as compared with the case where the outer case and the hot water storage tank are completely fixed by the metal member. It is difficult to prevent heat from escaping to the outer case because it has lower thermal conductivity than metal.

  The support member 13 has a low-rigidity body for adjusting the dimensional error, but can absorb more impact by lengthening the high-rigidity body for absorbing the drop impact. In general, 5 to 10% of the dimension of the highly rigid portion is desirable. The rigidity ratio of the support member 13 is preferably about 8 to 20 for the high-rigid body when the low-rigid body is 1.

  As described above, the support member 13 and the molded heat insulating material 7 may be joined by an adhesive or the like. Alternatively, a fitting portion is provided on the upper shoulder of the molded heat insulating material 7 so that the lower portion of the support member 13 is provided below. You may make it fit. At this time, in order to prevent the support member 13 from shifting when an impact from the horizontal direction occurs, it is more desirable that the portion where the support member 13 is joined to the molded heat insulating material 7 is made of a highly rigid body.

  Note that the cross-sectional shape of the support member 13 in the present embodiment may be a trapezoid whose upper base is shorter than the lower base. Thereby, the contact area of the support member 13 with respect to the molded heat insulating material 7 becomes smaller than the contact area of the support member 13 with respect to the outer case top plate 11, and the contact area between the support member 13 and the outer case top plate 11 is further sufficiently reduced. Therefore, the heat conduction to the outer case top plate 11 can be further suppressed, and the heat insulation performance of hot water can be further improved.

  In FIG. 3, the low-rigidity body and the high-rigidity body in the support member 13 are composed of the high-foaming molding material 17 having a low rigidity and the low-foaming molding material 18 having a high rigidity, but the support according to the present embodiment. The configuration of the member 13 is not limited to this. Other examples are shown below.

FIG. 11 is an enlarged cross-sectional view showing another example of the structure of the support member of the present embodiment.
In FIG. 11, the support member 23 is made of a foam molding material. The long hole portion formed below the support member 23 is a space. Since the long hole space portion 14 is provided, the rigidity of the portion having the long hole space portion 14 is lower in proportion to the effective cross-sectional area than the portion having no other space. The height of the long hole space 14 is preferably approximately 5 to 10% of the height of the support member 23, and the effective cross-sectional area is preferably 10 to 20%.

  The shape of the long hole space 14 is a combination of a circle and a rectangle, but may be an ellipse or a rectangle. Although the case where the number of the long hole spaces 14 is two is shown, the number is not limited to this and may be larger.

FIG. 12 is an enlarged cross-sectional view showing another example of the structure of the support member of the present embodiment.
The support member 33 is made of a foam molding material. A hollow portion 15 is provided at the lower portion of the support member 33. Since the cutout portion 15 is provided, the portion having the cutout portion 15 has lower rigidity in proportion to the effective cross-sectional area than the portion having no cutout portion. The height of the cut-out portion 15 is preferably about 5 to 10% of the height of the support member 33, and the effective cross-sectional area is preferably 10 to 20%.

FIG. 13 is an enlarged cross-sectional view showing another example of the structure of the support member of the present embodiment.
The support member 43 is made of a foam molding material. A plurality of trapezoidal teeth 16 are provided on the support member 43. Since the trapezoidal teeth 16 are provided, the portion having the trapezoidal teeth 16 has lower rigidity in proportion to the effective cross-sectional area than other portions. The height of the trapezoidal teeth 16 is desirably approximately 5 to 10% of the height of the support member 13, and the effective cross-sectional area is desirably 10 to 20%. Moreover, although the case where the number of the trapezoidal teeth 16 is four is shown, it may be more or less than this.

  Even when the support members 23, 33, and 43 described above with reference to FIGS. 11 to 13 are compressed, the same characteristics as the load-displacement diagram shown by the solid line in FIG. The same effect as the support member 13 is obtained. Furthermore, by providing a space in the same rigid foam molding material, a portion having a low rigidity in proportion to the effective cross-sectional area is generated, so that the manufacturing process can be simplified as compared with the case of joining foam molding materials having different rigidity. There is an effect such as cost reduction.

Embodiment 2. FIG.
In the first embodiment, the support member is provided between the outer case top plate and the molded heat insulating material. However, in the present embodiment, the case where the support member is provided between the outer case side plate and the molded heat insulating material will be described. . In addition, the same code | symbol is attached | subjected to the location same as Embodiment 1, and the description is abbreviate | omitted.

FIG. 14 is a front sectional view of hot water storage tank unit 110 according to the second embodiment.
A support member 53 is installed in the space between the molded heat insulating material 7 and the outer case side plate 10. The support member 53 has a compression characteristic in which a high-rigid body and a low-rigid body are connected in series. In other words, the support member 53 has a high rigidity portion and a low rigidity portion in series. Further, the low rigidity body of the support member 53 is formed shorter than the high rigidity body. Thus, by providing the support member 53 with a low-rigidity body, the low-rigidity body is displaced during assembly, and a dimensional error in the space between the molded heat insulating material 7 and the outer case 200 can be absorbed.

  One end of the support member 53 is joined to the upper shoulder portion of the molded heat insulating material 7, and the other end of the support member 53 is in contact with the upper end inner surface of the outer case side plate 10. Thereby, the support member 53 exhibits the function to hold | maintain the space | interval of the shaping | molding heat insulating material 7 and the upper end of the outer case side plate 10 in a horizontal direction. Note that the position where the support member 53 is provided is not limited to this as long as the gap can be maintained between the outer case side plate 10 and the molded heat insulating material 7.

FIG. 15 is an enlarged cross-sectional view showing a fitting structure between the support member 53 and the molded heat insulating material 7.
The support member 53 and the molded heat insulating material 7 may be joined by an adhesive or the like. Alternatively, as shown in FIG. 15, a concave fitting portion 7 a and a support member 53 are formed on the upper shoulder of the molded heat insulating material 7. A convex fitting portion 7b may be provided below and fitted.

  Next, the role of the support member 53 when an impact is applied to the hot water tank unit 110 during transportation or installation will be described. Here, the case where the hot water storage tank unit 110 is laid sideways and carried is considered. In the state without the support member 53, the lower part of the hot water storage tank 1 is supported by the bottom plate 9 via the tank legs 12, but there is a space between the molded heat insulating material 7 covering the hot water storage tank 1 and the outer case side plate 10. Therefore, when the hot water storage tank unit 110 is laid down for transportation, the hot water storage tank 1 moves largely toward the lower case side plate 10 due to gravity. Therefore, a large force is applied to the hot water discharge pipe 5 and the hot water supply pipe 6 connected to the upper part of the hot water storage tank 1, and as a result, there is a possibility of causing deformation or breakage.

  Here, as shown in FIG. 14, when the support member 53 is provided, the upper part of the hot water storage tank 1 is supported by the upper end of the outer case side plate 10 via the molded heat insulating material 7 and the support member 53. That is, since the space between the molded heat insulating material 7 and the outer case side plate 10 is held by the support member 53, the hot water storage tank 1 does not move to the side even if it is laid down during transportation, Since a large force is not applied to the hot water outlet pipe 5 and the hot water supply pipe 6, the occurrence of deformation and breakage of the hot water outlet pipe 5 and the hot water supply pipe 6 can be suppressed.

  As described above, according to the second embodiment of the present invention, the support member 53 is provided between the molded heat insulating material 7 and the outer case side plate 10, and the support member 53 has a high-rigidity body and a low-rigidity body in series. Therefore, the low-rigidity body absorbs the dimensional error of the hot water storage tank unit 110 and the outer case, and the high-rigidity body supports the load when the hot water storage tank unit 110 is laid down sideways during transportation. 7 and the function of maintaining the distance between the upper end of the outer case side plate 10 in the horizontal direction.

  As a result, if a part of the low-rigid body in the support member 53 is displaced and an initial load is applied during assembly, the load due to the hot water storage tank 1 being laid down is received by the support member 53 and the hot water storage tank 1 Plastic deformation of the hot water discharge pipe 5 and the hot water supply pipe 6 connected to the upper part can be prevented. That is, even when there is a space between the molded heat insulating material 7 and the outer case side plate 10, the hot water storage tank unit 110 can be laid sideways and transported. Further, even when a dimensional error occurs when assembling the hot water storage tank unit 110, the hot water storage tank unit 110 can be assembled without processing the support member 53, so that the assembling property is improved.

FIG. 16 shows a combination of the support member 53 according to the present embodiment and the support member 13 according to the first embodiment.
Further, the support member 53 according to the present embodiment and the support member 13 according to the first embodiment may be combined. Thereby, not only the plastic deformation of the hot water discharge pipe 5 and the hot water supply pipe 6 due to the impact at the time of lying down, but also the plastic deformation of the outer case side plate 10 due to the impact at the time of dropping can be suppressed.

  Further, the contact area of the support member 53 with the outer case side plate 10 is smaller than that when the molded heat insulating material 7 is in direct contact with the outer case side plate 10, so that the heat of the hot water storage tank 1 can be reduced. The escape to the case 200 can be further suppressed, and the heat insulation performance of hot water can be improved.

  Further, by using foamed molding material for the support member 53 for both the high-rigidity body and the low-rigidity body, it is difficult for the impact to be directly transmitted to the hot water storage tank as compared with the case where the outer case and the hot water storage tank are completely fixed by the metal member. Since heat conductivity is lower than that of metal, it is possible to further suppress heat from escaping to the outer case.

  Further, the cross-sectional shape of the support member 53 in the present embodiment may be a trapezoid whose side in contact with the outer case side plate 10 is shorter than the side in which the molded heat insulating material 7 is joined. As a result, the contact area between the support member 53 and the outer case side plate 10 can be further reduced sufficiently, so that heat conduction to the outer case side plate 10 can be further suppressed, and the hot water insulation performance can be further improved. .

  The support member 53 of the present embodiment is also composed of the high foam molding material 17 having low rigidity and the low foam molding material 18 having high rigidity, as in the first embodiment. As described, the configuration of the support member 53 is not limited to this.

Embodiment 3 FIG.
In the present embodiment, a case will be described in which the support member is provided between a bent portion where the upper end of the outer case side plate is bent inward and a molded heat insulating material. In addition, the same code | symbol is attached | subjected to the location same as Embodiment 1 and 2, and description is abbreviate | omitted.

FIG. 17 is a front cross-sectional view of hot water storage tank unit 120 according to the third embodiment.
FIG. 18 is an enlarged cross-sectional view showing a fitting structure between the support member 63 and the molded heat insulating material 7.
As shown in FIG. 18, in the present embodiment, the opposing pair of outer case side plates 10 has a bent portion 10 b that is bent at the upper end of the outer case side plate 10 inward, that is, toward the hot water storage tank 1. In FIG. 17, only one pair of the outer case side plates 10 facing each other has the bent portions 10b, but the other set of outer case side plates 10 may also be provided with the bent portions 10b.

  A support member 63 is installed between the molded heat insulating material 7 and the bent portion 10 b of the outer case side plate 10. The support member 63 has a compression characteristic in which a high-rigid body and a low-rigid body are connected in series. In other words, the support member 63 has a portion with high rigidity and a portion with low rigidity in series. Further, the low-rigid body of the support member 63 is formed with a shorter distance than the high-rigid body. Thus, by providing the support member 63 with a low-rigidity body, a dimensional error in the space between the molded heat insulating material 7 and the outer case 210 can be absorbed.

  One end of the support member 63 is inclined and joined to the slope of the upper shoulder portion of the molded heat insulating material 7, and the other end of the support member 63 is in contact with the lower surface of the bent portion 10 b at the upper end of the outer case side plate 10. Thereby, the support member 63 exhibits the function of maintaining the distance between the molded heat insulating material 7 and the bent portion 10 b at the upper end of the outer case side plate 10.

  The support member 63 and the molded heat insulating material 7 may be bonded by an adhesive or the like, or, as shown in FIG. 18, the concave fitting portion 7a and the support member 63 on the upper shoulder of the molded heat insulating material 7. A convex fitting portion 7b may be provided below and fitted.

Next, the role of the support member 63 when a vertical impact due to, for example, dropping is applied to the hot water storage tank unit 120 during transportation or installation will be described.
When the tank legs 12 of the dropped hot water storage tank unit 120 land on the floor or the ground and the downward movement of the hot water storage tank 1 stops suddenly, the bent portion 10b at the upper end of the outer case side plate 10 is supported by the support member 63. That is, the outer case side plate 10 and the outer case top plate 11 can be further lowered by the support member 63 and the stress applied to the outer case side plate 10 can be relieved. Can be suppressed.

Next, a description will be given of the role of the support member 63 when a horizontal impact is applied to the hot water storage tank unit 120, for example, by laying it down during transportation or installation.
A space between the molded heat insulating material 7 and the bent portion 10b is supported by the support member 63 in the horizontal direction. For this reason, the hot water storage tank 1 does not move greatly toward the outer case side plate 10 where the hot water storage tank 1 is lowered due to gravity due to being laid, and a large force is applied to the hot water discharge pipe 5 and the hot water supply pipe 6 connected to the upper part of the hot water storage tank 1. It doesn't hang. Therefore, the occurrence of deformation or breakage of the hot water discharge pipe 5 or the hot water supply pipe 6 can be suppressed.

  As described above, in the present embodiment, the outer case side plate 10 has the bent portion 10b bent in the inner direction at the upper end, the support member 63 is provided between the molded heat insulating material 7 and the bent portion 10b, and Since the support member 63 has a high-rigidity body and a low-rigidity body in series, the low-rigidity body absorbs dimensional errors of the hot water storage tank unit 120 and the outer case 210, and the high-rigidity body is used for transportation or installation. It is possible to support a load caused by a vertical impact caused by a drop generated in the horizontal direction and a horizontal impact such as a sideways fall.

  That is, even when there is a space between the molded heat insulating material 7 and the outer case 210, it is possible to suppress plastic deformation of the hot water storage tank unit 120 due to an impact at the time of dropping or lying down. Furthermore, even if a dimensional error occurs when assembling the hot water storage tank unit 120, the hot water storage tank unit 120 can be assembled without processing the support member 63, so that the assemblability of the hot water storage tank unit 120 is improved.

  Further, the area where the support member 63 contacts the outer case 210 may be smaller than the contact area when the heat insulating material is in direct contact with the outer case 210, so that the heat of the hot water storage tank 1 escapes to the outer case 210. Can be further suppressed, and the heat insulation performance of hot water can be improved.

  Further, as shown in FIG. 18, the vertical cross section of the support member 63 has a substantially trapezoidal shape, and the bottom side is formed with a longer dimension than the upper side, so that the contact area between the molded heat insulating material 7 and the support member 63 is the bent portion 10b. And the contact area between the support member 63 and the support member 63. Thereby, even if it receives a load from outer case side plate 10, it can support more stably. Further, since the contact area between the support member 63 and the bent portion 10b at the upper end of the outer case side plate 10 is small, heat conduction to the outer case side plate 10 can be further suppressed.

  Further, by bringing the support member 63 into contact with the bent portion 10b at the upper end of the outer case side plate 10, the strength against the load in the horizontal direction is increased, and the impact can be transmitted to the support member 63 more reliably.

  In addition, by supporting the support member 63 so as to be inclined outward with respect to the horizontal surface of the hot water storage tank 1, the support member 63 can receive the force in two directions from the vertical direction and the horizontal direction more reliably. it can. Therefore, it is possible to more reliably prevent plastic deformation of the hot water storage tank unit 120 when falling or lying down.

  Further, by using foamed molding material for the support member 63 for both the high-rigidity body and the low-rigidity body, the impact is directly transmitted to the hot water storage tank 1 as compared with the case where the outer case 210 and the hot water storage tank 1 are completely fixed by the metal member. It is difficult to prevent heat from escaping to the outer case 210 because the heat conductivity is lower than that of metal.

  Needless to say, when the outer case top plate 11 and the support member 63 are brought into contact with each other, the same effect as in the present embodiment can be obtained by bending the upper end of the outer case top plate 11 inward.

  The support member 63 of the present embodiment is also composed of the high foam molding material 17 having a low rigidity and the low foam molding material 18 having a high rigidity, as in the first embodiment. As described, the configuration of the support member 63 is not limited to this.

  In Embodiments 1 to 3 described above, other heat insulating materials such as a vacuum heat insulating material in addition to the molded heat insulating material 7 may be used as the heat insulating material covering the hot water storage tank 1. In this case, the same effect as in the first to third embodiments can be obtained by attaching the support member described in the first to third embodiments to a vacuum heat insulating material or the like.

  DESCRIPTION OF SYMBOLS 1 Hot water storage tank 2 Water supply piping 3 Water supply piping 4 Heating means 5 Hot water supply piping 6 Hot water supply piping 7 Molding heat insulating material 7a Recessed fitting part 7b Convex fitting part 8 Tank leg 9 Bottom plate 10 Outer case side plate 10a Notch 10b Bending part 11 Outer case top plate 12 Tank unit legs 13, 23, 33, 43, 53, 63 Support member 14 Slotted hole space portion 15 Cut-out portion 16 Trapezoidal teeth 17 High foam molding material 18 Low foam molding material 100, 110, 120 Hot water storage Tank unit 200, 210 outer case 19 screws.

Claims (6)

A hot water storage tank for storing heated hot water;
A heat insulating material for insulating at least the upper part of the hot water storage tank;
An outer case covering the heat insulating material;
A support member disposed between the outer case and the heat insulating material, having one end abutting on the outer case, the other end being joined to the heat insulating material, and partially supporting the outer case with the heat insulating material; With
The support member has a low-rigidity body having low rigidity and a high-rigidity body having high rigidity in series from the outer case to the heat insulating material, and at least one end of the support member is either the low-rigidity body or the high-rigidity body. Consists of
The outer case includes a top plate that covers an upper portion and a side plate that covers a side portion, the support member is disposed between the side plate and the heat insulating material, one end abuts on the side plate, and the other end is the heat insulating material. A hot water storage tank unit characterized in that it is joined to the water storage tank unit. A hot water storage tank for storing heated hot water;
A heat insulating material for insulating at least the upper part of the hot water storage tank;
An outer case covering the heat insulating material;
A support member disposed between the outer case and the heat insulating material, having one end abutting on the outer case, the other end being joined to the heat insulating material, and partially supporting the outer case with the heat insulating material; With
The support member has a low-rigidity body having low rigidity and a high-rigidity body having high rigidity in series from the outer case to the heat insulating material, and at least one end of the support member is either the low-rigidity body or the high-rigidity body. Consists of
The outer case includes a top plate that covers an upper portion and a side plate that covers a side portion. The side plate has a bent portion that is bent inward at an upper end, and the support member is between the bent portion and the heat insulating material. A hot water storage tank unit, wherein one end is in contact with the bent portion and the other end is joined to the heat insulating material . The low rigidity of the support member which is disposed between the heat insulating material and said outer case, according to any one of claims 1 to 2, characterized in that it is shorter than the high-rigidity body Hot water storage tank unit. The said support member consists of a foaming molding material, The part with low rigidity was produced in proportion to the effective cross-sectional area by providing a space in a part of said foaming molding material. The hot water storage tank unit according to any one of 2 above. The hot water storage tank unit according to any one of claims 1 to 2 , wherein the support member is formed by joining a foam molded material having low rigidity and a foam molded material having high rigidity in a series arrangement direction. A hot water supply apparatus that transports water from the hot water storage tank unit according to any one of claims 1 to 5 to a heating means, and transports and stores the water heated by the heating means into the hot water storage tank.

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