JP2002106962A - Heat storage vessel and bathroom heat supply apparatus using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat storage vessel and a bathroom heat supply apparatus using the heat storage vessel capable of raising heat storage performance without causing increase in size of the vessel. SOLUTION: The heat storage tank 1 comprises a plurality of weirs 2A-2D partitioning an interior of a container 11 for storing a heat storage fluid into a plurality of sub-tanks 1A-1E, and a plurality of submerged weirs 3A-3D provided respectively in the vicinity of the weirs 2A-2D. At least either the weirs 2A-2D or the submerged weirs 3A-3D are made hollow in their interiors. Heat insulation members 7b are provided respectively in the interiors of the weirs 2A-2D or 3A-3D. The respective weirs 2A-2D and 3A-3D are formed integrally with the container 11. Further, in the bathroom heat supply apparatus 28 having the heat storage tank 1 installed below a floor face 30 of a bathroom 29, heat conduction members 31A-31E are provided between the floor face 30 and the heat storage tank 1 so as to supply part of heat of the tank 1 into the bathroom 29.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat storage tank suitable for use in, for example, a hot water supply apparatus and a bathroom heat supply device using the heat storage tank.

[0002]

2. Description of the Related Art As shown in FIG.
The inside of the container 11 for storing a heat storage fluid (for example, hot water or cold water of a hot water supply device) includes weirs 2A and 2B and dive weirs 3A and 3A.
B is known to be divided into a plurality of tanks 1A to 1C and water passages 4A and 4B. For example, JP-A-6-2415
No. 09, the weirs 2A and 2B extend in the vertical direction and open at the liquid level of the heat storage fluid.
A and 3B are provided near one side (high-temperature side of the heat storage fluid) of each of the weirs 2A and 2B, and extend from the ceiling 11a and open to the bottom 11b.

[0003] Thereby, for example, a tank 1 in which cold water remains.
In the case where hot water is stored in A to 1C, the hot water in the tank 1A passes through the water channel 4A from the lower side of the dive weir 3A and pushes out the next tank 1B from the opening of the weir 2A while pushing out cold water as shown by a broken line. It flows into the upper side. Conversely, when hot water is used, the cold water in the tank 1C flows through the water passage 4B from the upper side of the weir 2B and flows into the lower side of the next tank 1B from the opening of the dive weir 3B while pushing out the hot water as shown by the solid line. I will do it. At this time, the hot water and the cold water do not mix with each other, and the temperature stratification is performed in any of the tanks 1A to 1C according to the heat storage amount or the usage amount of the heat storage fluid so that the hot water is always above the cold water due to the difference in specific gravity. 8 are formed to ensure heat storage performance.

[0004]

However, when the heat storage fluid is not being stored or used, the temperature stratification 8 is stationary.
The cold water of B exchanges heat with the warm water of the adjacent tank 1A through the weir 2A and the dive weir 3A, and this warm water causes a temperature drop. In addition, the hot water in the tank 1B exchanges heat with the cold water in the adjacent tank 1C through the dive weir 3B and the weir 2B, and this cold water causes a rise in temperature, so that the thermal stratification 8 collapses as a whole, so that the heat storage performance is reduced.

In order to secure the required amount of heat storage, the capacity of the tanks 1A to 1C must be increased to the extent that the temperature stratification collapses.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a heat storage tank capable of improving heat storage performance without increasing the size of the tank, and a bathroom heat supply device using the heat storage tank.

[0007]

The present invention employs the following technical means to achieve the above object.

According to the first aspect of the present invention, the high-temperature opening (9) through which the high-temperature heat storage fluid flows into and out of one of the containers (11) storing the heat storage fluid, and the low-temperature heat storage fluid through the other. A low-temperature opening (10) for inflow and outflow is provided, and the inside of the container (11) is partitioned into a plurality of tanks (1A to 1E) from the high-temperature opening (9) to the low-temperature opening (10). A plurality of vertical weirs (2A to 2D) opening to the surface of the heat storage fluid in the container (11);
A to 2D) near the high-temperature opening (9) side, extend from the ceiling (11a) of the container (11), and extend from the bottom (11).
b) In a heat storage tank having a plurality of submerging weirs (3A to 3D) opening between the submerging weirs (2A to 2D) and at least one of the plurality of submerging weirs (3A to 3D), the inside is hollow. It is characterized by being formed so as to be.

Thus, each weir (2A-2D, 3A-3
Since the heat insulation effect by the air layer is obtained in D), heat transfer between the low-temperature side tank and the high-temperature side tank is suppressed, and the temperature stratification (8) does not collapse. The heat storage performance can be improved without increasing the size of). Also,
The heat storage tank can be reduced in size as the heat storage performance is improved.

According to the second aspect of the present invention, the plurality of weirs (2
A to 2D) and a plurality of submerging weirs (3A to 3D) are provided with a heat insulating member (7b) in the hollow interior.

Thus, the heat insulating effect is further improved, and the heat storage performance can be improved.

According to the third aspect of the present invention, a plurality of weirs (2
A to 2D) and at least one of the plurality of submerging weirs (3A to 3D) are formed integrally with the container (11).

Thus, each weir (2A-2D, 3A-3
Since the inside of D) is hollow, the weirs (2A to 2D, 3A to 3D) can be formed integrally with the container (11) by resin molding or bending and drawing of a metal plate, so that the cost can be reduced.

According to the fourth aspect of the invention, the first to third aspects are provided.
The heat storage tank (1) described in (1) above, the floor (30) of the bathroom (29)
And a part of the heat of the heat storage tank (1) is supplied to the interior of the bathroom (29).

Specifically, as in the fifth aspect of the present invention, heat conducting members (31A to 31E) are provided between the floor (30) and the heat storage tank (1). .

Thus, when the high-temperature heat storage fluid is stored in the heat storage tank (1) mainly after use of the bathroom (29), the heat of the improved heat storage performance according to claims 1 to 3 is transferred to the bathroom (29). ) Can be supplied to the floor surface (30) to evaporate the moisture in the bathroom (29) and prevent the occurrence of mold, so that the bathroom can always be used cleanly.

The reference numerals in the parentheses of the above means indicate the correspondence with the specific means described in the embodiment described later.

[0018]

(First Embodiment) FIG. 1 shows a first embodiment of the present invention. In the first embodiment, the heat storage tank 1 of the present invention is applied to a heat pump hot water supply device 50. First, the overall configuration will be described.

A heat pump type hot water supply device (hereinafter referred to as a hot water supply device) 50 is used for general household use.
It comprises a heat pump 50A as a heating means and a heat storage tank 1 as a storage container for a heat storage fluid.

The heat pump 50A includes an electric compressor 5
1, a well-known device comprising a water heat exchanger 52, an expansion valve 53, and a refrigerant heat exchanger 54, for example, a refrigerant such as CO ₂
The heat storage fluid is heated to a predetermined temperature by exchanging heat with a heat storage fluid from a heat storage tank 1 described later by a water heat exchanger 52 at a high temperature and a high pressure in 1. The heat source of the heat storage fluid is not limited to the heat pump 50A, but may be a gas, an electric heater, solar heat, or the like. Here, the heat storage fluid is tap water used in a home washroom, a kitchen, a bathroom, and the like.

The heat storage tank 1 includes a container 11 having a high-temperature opening 9, a low-temperature opening 10, weirs 2A to 2D, and dive weirs 3A to 3D.

Above one longitudinal side wall of the container 11, a hot water side opening 9 is provided as a high temperature opening through which hot tap water (hereinafter, hot water) flows in and out, and the other side wall is provided. Low-temperature tap water (hereinafter referred to as cold water)
A cold water-side opening 10 is provided as a low-temperature opening that flows out.

A plurality of tanks 1A are placed in the container 11 so that the container 11 is directed from the hot water side opening 9 side to the cold water side opening 10 side.
There are provided a plurality of weirs 2A to 2D that partition into 1E to 1E.
The weirs 2A to 2D extend in the vertical direction from the bottom 11b, and open at the liquid surface of hot or cold water stored inside.

Further, a plurality of submerging weirs 3A to 3D are provided near the hot water side opening 9 of each of the weirs 2A to 2D, extending from the ceiling 11a and opening to the bottom 11b.

The weirs 2A to 2D and the dive weir 3
A to 3D are all formed so that the inside becomes hollow.

Further, the entire exterior of the container 11 is wrapped with a heat insulating member 7a such as glass wool or urethane, for example, so that the heat of the internal hot water or cold water does not leak outside. In addition, the weirs 2A to 2D and the dive weir 3A
Similarly, a heat insulating member 7b is inserted into the hollow interior of 3D.

The hot water side opening 9, the cold water side opening 10 and the water heat exchanger 52 of the heat storage tank 1 are connected by the heat storage pipe 14, and a pump is provided between the cold water side opening 10 and the water heat exchanger 52. 55 is provided so that cold water in the heat storage tank 1 is circulated to the hot water side opening 10 through the water heat exchanger 52.

Further, a water supply pipe 15 connected to the three-way valve 13 is provided near the cold water side opening 10, and a hot water supply pipe 16 connected to the three-way valve 12 is provided near the hot water side opening 9. ing.

Here, a method of manufacturing the heat storage tank 1 will be described.

As shown in FIG. 2, the heat storage layer 1 joins the upper member 21 and the lower member 22. The upper member 21 forms portions corresponding to the dive weirs 3A to 3D with respect to the flat plate shape forming the ceiling portion 11a, and is integrally formed by injection molding of a resin so as to have a crank shape. The lower member 22 is a rectangular parallelepiped bottom 1 opening on the ceiling side.
1b, a portion corresponding to the weirs 2A to 2D is formed, and the bottom portion 11b is integrally formed by injection molding of a resin so as to have a crank shape, and the upper member 21 and the lower member 22 are welded by resin. Are joined. 3A
3D and weirs 2A to 2D have a ceiling 11a and a bottom 11a.
By forming b into a crank shape, it is formed so that the inside becomes hollow.

The material of each of the members 21 and 22 is not limited to a resin material but may be a metal material. In the case of a metal material, each weir 2A-2D, 3A-
3D can be integrally formed, and the heat storage tank 1 can be manufactured by welding the members 21 and 22.

Next, the operation of the hot water supply device 50 having the above configuration will be described.

In the heat storage tank 1, hot water is stored and stored by receiving heat from the heat pump 50A that operates mainly at midnight. That is, the three-way valves 12 and 13 open to the heat storage pipe 14 side,
The cold water in the heat storage tank 1 is supplied to the water heat exchanger 52 by a pump 55.
The hot water is then exchanged with the high-temperature refrigerant to become hot water, and stored and stored in the tanks 1 </ b> A to 1 </ b> E sequentially from the hot water side opening 9 so that the tanks become full.

In the daytime, warm water is used by a user in a washroom or the like. In this case, the three-way valves 12 and 13 open the water supply pipe 15 side and the hot water supply pipe 16 side, respectively.
Hot water flows out and is used, and tap water (cold water) is supplied from the water supply pipe 16 accordingly.

At this time, according to the amount of hot water used by the user,
For example, the cold water flows through the channel 4C from the upper opening of the weir 2C, and flows from the lower opening of the dive weir 3C to the adjacent hot water tank 1C.
Flows into Then, the temperature stratification 8 is formed without mixing of the two due to the specific gravity difference between the hot water and the cold water.

Next, effects of the first embodiment will be described. Normally, the heat storage performance is ensured by separating the hot water and the cold water in the heat storage tank 1 by the temperature stratification 8 as described above.
Heat transfer between hot water and cold water occurs through A to 2D or dive weirs 3A to 3D, and the thermal stratification 8 collapses, lowering the heat storage performance. In the present embodiment, however, weirs 2A to 2D and dive weir 3A 3D is hollow and the heat insulating member 7b is inserted into the hollow, so that a sufficient heat insulating effect can be obtained, and heat transfer between the low-temperature side tank and the high-temperature side tank is prevented. Since the temperature stratification 8 is suppressed and does not collapse, the heat storage performance can be improved without increasing the size of each of the tanks 1A to 1E. Further, if the performance is equivalent, the heat storage tank 1 can be reduced in size because the heat storage performance can be improved.

The weirs 2A to 2D and the dive weirs 3A to 3D
Since the inside of D is hollow, it can be formed integrally with the container 11 by resin molding or bending and drawing of a metal plate, so that the cost can be reduced.

(Second Embodiment) FIG. 3 shows a second embodiment of the present invention. In the second embodiment, a heat supply device 28 to a bathroom 29 is provided by utilizing the heat storage tank 1 in the first embodiment.

The bathroom heat supply device 28 is connected to the floor 3 of the bathroom 29.
The heat storage tank 1 of the first embodiment is installed below the heat storage tank 0 using a heat storage tank base 32. Here, in order to supply the heat of the heat storage tank 1 to the interior of the bathroom 29, heat conducting members 31A to 31E are provided between the tanks 1A to 1E and the floor surface 30. Specifically, it is made of a copper material, an aluminum material, or the like having good thermal conductivity.
The volume (area, plate thickness) of the heat storage tank 1 is set to ensure the required amount of heat storage and to obtain the amount of heat to be supplied to the bathroom 29.

Regarding the operation of the bathroom heat supply device 28,
This will be described below. After using the bathroom, heat pump 50 at midnight
By A (FIG. 1), the used hot water is stored in the heat storage tank 1 and heat is stored. Part of the heat of the heat storage tank 1 is supplied to the bathroom 29 through the heat conducting members 31A to 31E, and heats the floor 30.

Thus, the moisture in the bathroom 29 is evaporated to prevent the occurrence of mold, so that the bathroom can always be used cleanly.

In this case, it is preferable to operate the ventilation fan in the bathroom 29 in conjunction with each other. Specifically, it is preferable to add a timer function to operate the ventilation fan for a predetermined time after the hot water is stored in the heat storage tank 1.

(Other Embodiments) In the first and second embodiments, the heat insulating member 7b is inserted into the hollow interior of the weirs 2A to 2D and the dive weirs 3A to 3D, but may be left hollow. . The heat insulation effect is obtained by the air layer inside,
Similarly, the heat storage performance can be improved.

In the second embodiment, the heat conducting members 31A to 31E may be omitted, and the ceilings of the tanks 1A to 1E may partially contact the floor surface 30, respectively.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a configuration of a first embodiment of the present invention.

FIG. 2 is a perspective view showing a method of manufacturing the heat storage tank in FIG.

FIG. 3 is a cross-sectional view illustrating a configuration of a second embodiment of the present invention.

FIG. 4 is a sectional view showing a conventional heat storage tank.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Thermal storage tank 11 Container 11a Ceiling part 11b Bottom part 2A-2D Weir 3A-3D Diving weir 7b Heat insulation member 9 Hot water side opening (high temperature opening) 10 Cold water side opening (low temperature opening) 28 Bathroom heat supply device 29 Bathroom 30 Floor surface 31A-31E Heat conduction member

Continued on the front page (72) Inventor Hisasuke Sakakibara 1-1-1, Showa-cho, Kariya-shi, Aichi F-term in DENSO Corporation (Reference) 3L036 AB02 AB04 AB07 AB12 AB16

Claims (5)

[Claims] A container (11) for storing a heat storage fluid; a high-temperature opening (9) provided in one of the containers (11), through which a high-temperature heat storage fluid flows in and out; ), And a low-temperature opening (10) through which a low-temperature heat storage fluid flows in and out; and the inside of the container (11) from the high-temperature opening (9) side to the low-temperature opening (10) side. Multiple tanks (1A-1E)
A plurality of vertical weirs (2A to 2D) that open to the liquid surface of the heat storage fluid in the container (11); and the high-temperature openings (9) of the plurality of weirs (2A to 2D). ), Near the ceiling (11) of the container (11).
a) a plurality of submerged weirs (3A to 3D) extending from a) and opening to the bottom (11b), the plurality of submerged weirs (2A to 2D) and the plurality of submerged weirs (3A to 3D). ), Wherein at least one of the heat storage tanks is formed so that the inside becomes hollow. 2. A heat insulating member (7b) is provided in a hollow interior of at least one of the plurality of weirs (2A to 2D) and the plurality of dive weirs (3A to 3D). 2. The heat storage tank according to 1. 3. The container according to claim 1, wherein at least one of the plurality of weirs (2A to 2D) and the plurality of submerged weirs (3A to 3D) is formed integrally with the container (11). 3. The heat storage tank according to 2. 4. The heat storage tank (1) according to claim 1, wherein
A bathroom heat supply device, which is installed below a floor surface (30) of a bathroom (29) and supplies a part of heat of the heat storage tank (1) into the bathroom (29). 5. The bathroom heat supply according to claim 4, wherein heat conducting members (31A to 31E) are provided between the floor surface (30) and the heat storage tank (1). apparatus.