JPH0820195B2 - Heat storage device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is attached to hot water supply equipment,
The present invention relates to a heat storage device connected to a heat exchanger or the like used to heat tap water or the like.

[0002]

2. Description of the Related Art Hot water supply to kitchens and baths attached to houses, and hot water supply to floor heating systems, air conditioning systems, etc.
A water heater or a heat storage device is used. This water heater has a water tank into which a predetermined volume of water, for example, 500 liters, is poured,
It is roughly composed of an electric heater arranged in this water tank, and the water filled and filled in the water tank is heated and kept warm by an electric heater using cheap night power, and the hot water in the water tank is used. It is a thing.

Further, the heat storage device has a water tank installed in the basement of a building such as a building, heat-exchanges the water filled in the water tank with waste heat or outside air, and stores it as hot water or cold water. The water tank made of heat-insulating material that is used as a heat storage tank is installed under the floor of the building, etc., and the water is filled in this tank, and electric The water is heated and kept warm, and the heat transfer medium such as oil in the circulation pipe that goes around the water tank is heated by heat conduction, and this circulation pipe is connected to the inside of the heat exchanger by piping from the water supply. There is also something that heats the water in the supply pipe.

[0004]

However, in the above-described water heater, the amount of hot water used for hot water supply is limited because the hot water is heated by heating only a predetermined amount of water filled in the water tank. If the amount exceeds the predetermined amount, there is a drawback that it is not possible to obtain hot water of the predetermined amount or more.

Further, in this water heater, in order to obtain hot water again when the hot water in the water tank is exhausted, the water is re-injected into the water tank and heated. Not only does the amount increase, but it also has the drawback that it takes time to obtain hot water, and there is the problem that hot water cannot be obtained easily. Further, since the electric heater is directly immersed in the water tank, there is a problem that the electric heater may be corroded.

On the other hand, in the above-mentioned heat storage device, since the heat storage material for storing heat is water, the structure of the water tank filled with this water must be processed to prevent water leakage, and the necessary amount of heat is stored. Therefore, the scale of the water tank has to be made large, so that there is a drawback that not only the construction cannot be performed easily, but also the construction is complicated and the cost becomes large.

Further, since the water filled in the water tank is used as a heat storage material, when it is heated by an electric heater, it can be heated only up to the boiling temperature due to the nature of the water, and the heat is heated by the heat storage device. There is a drawback in that the temperature of the hot water heated by the heat exchanger via the circulating heat transfer medium does not become sufficient hot water.

Further, since the electric heater for heating the water in the water tank is directly immersed in the water in the water tank as in the water heater, the electric heater causes corrosion and damage due to aging. There was a problem.

Therefore, in order to solve the above problems, the present invention aims to provide a heat storage device which can store and hold a sufficient temperature and can easily and effectively use the stored heat. I am trying.

[0010]

Means for achieving the above object will be described below with reference to the drawings corresponding to the embodiments. In the heat storage device 1 of the present invention, a box-shaped heat storage tank 2 having heat insulating properties is filled with a heat storage material 4 made of gravel, and a heat radiation panel 32 and a heat collection panel 33 which are integrally formed are provided in the heat storage material 4. The heating means 11 which is embedded in the heat radiation panel 32 and heats the heat storage material 4 and the heat transfer medium made of liquid provided in the heat collection panel 33 circulate and extend to the outside of the heat storage tank 2. It is characterized in that the circulation pipe 15 is arranged in parallel.

In the heat storage device 40 of the present invention, the box-shaped heat storage tank 2 having heat insulation properties is filled with the heat storage material 4 made of gravel, and the heat storage panel 4 and the heat collection panel 12 are placed in the heat storage material 4.
And are embedded facing each other with a predetermined gap between them,
On the heat dissipation panel 41, a heating means 11 for heating the heat storage material 4 and a heat transfer pipe 115 for circulating a heat transfer medium made of a liquid and extending out of the heat storage tank 2 are arranged in parallel, and the heat collection panel 12 is provided. A circulation pipe 15 is provided in which the heat transfer medium made of a liquid circulates and extends outside the heat storage tank 2.

[0012]

The heat storage tank 2 is filled with gravel as the heat storage material 4, and the heat dissipation panel 32 is integrally formed in the heat storage material 4.
The heat collecting panel 33 is embedded. The heating means 11 provided on the heat dissipation panel 32 heats the heat storage material 4 via the heat dissipation panel 32 and causes the heat storage material 4 to store heat. The heat collection panel 33 absorbs the heat stored in the heat storage material 4 and heats the heat transfer medium in the circulation pipe 15 provided in the heat collection panel 33. Then, the heat transfer medium in the circulation pipe 15 is circulated and sent to the outside of the heat storage tank 2.

The heat radiation panel 32 and the heat collection panel 3 are provided.
3 is integrally formed and embedded in the heat storage material 4, and has a structure in which the heating means 11 and the circulation pipe 15 are arranged in parallel. The circulation pipe 15 directly absorbs heat via the heat transfer section 31a.

Further, when the heating means 11 and the heat transfer pipe 115 are arranged in parallel on the heat radiation panel 41, and the heat radiation panel 41 and the heat collection panel 12 are embedded so as to face each other at a predetermined interval, Heat is stored in the heat storage material 4 by the heating means 11 via the heat dissipation panel 41, and the heat collection panel 12 absorbs this heat to heat the heat transfer medium in the circulation pipe 15 and also in the heat transfer pipe 115. The heat transfer medium directly absorbs the heat of the heating means 11.

[0015]

1 is a perspective view showing a first embodiment of a heat storage device according to the present invention. The heat storage device 1 of the first embodiment
Is generally composed of a heat storage tank 2, a heat radiation panel, and a heat collection panel.

First, the heat storage tank 2 is formed in a rectangular box shape from concrete or the like, and a heat insulating material 3 such as rock wool is spread on the inner wall surface.

The heat storage tank 2 is filled with a heat storage material 4 composed of gravel mixed with crushed stone or sand. The heat storage material 4 has a density of 1990 kg / m ³ and a specific heat of 1.6 KJ / kgK.

In this heat storage tank 2, a thermistor thermometer for measuring the temperature of the heat storage material 4 in the tank 2 at a desired position, for example, a position close to a heat radiation panel and a heat collection panel which will be described later. A temperature sensor 5 is provided, and a vent pipe 6 for bleeding air from the tank is provided on the side portion on the bottom side.

Next, the heat dissipation panel section 3 as a heat dissipation panel
As shown in FIG. 2, reference numeral 2 denotes a pipe 8 and a panel plate 9 which are integrally formed, and is made of a copper pipe 8 having good heat conductivity, for example, a pipe material for a heating and cooling device. Ω-shaped mounting bracket 10 into which the pipe 8 is attached
And a panel plate 9 made of a thin copper plate extending in the radial direction with respect to the pipe 8 while sandwiching the pair of mounting pieces 10a of the mounting bracket 10 and covering the mounting piece 10a. Due to the formation, they have a structure in which they are closely formed.

Further, the heat collecting panel portion 3 as a heat collecting panel
3 is formed in substantially the same shape as the heat dissipation panel portion 32, the copper pipe 13 and the panel plate 1 attached to the copper pipe 13 via a mounting bracket (not shown).
4.

As shown in FIGS. 1 and 3, the heat radiation panel section 32 and the heat collection panel section 33 are located in the right or left half (upper half in FIG. 3) and the left or right half of the center, respectively. Part (the lower half part in FIG. 3) is integrally formed and each panel plate 9 and 14 is formed into a single plate to form a heat transfer panel 31, which is substantially vertical in the heat storage tank 2. Is embedded in the heat storage material 4 so that In addition, a predetermined width portion which is a central portion of the heat transfer panel 31 is a heat transfer portion 31 a between the heat radiation panel portion 32 and the heat collection panel portion 33.

One end of the pipe 8 provided in the heat radiation panel portion 32 projects out of the heat storage tank 2, and a rod-shaped electric heater 11 as a heating means is provided in the pipe 8 as shown in FIG. Has been inserted.

Further, the copper pipe 13 of the heat collecting panel portion 33
A circulation pipe 15 having a heat insulating property extending to the outside of the heat storage tank 2 is connected to both ends of the.

The circulation pipe 15 is composed of a forward path pipe 15a and a return path pipe 15b. The forward path pipe 15a extends from the upper part of the heat storage tank 2, and the return path pipe 15b is located in the heat storage tank 2.
It is provided so as to extend from the lower part of the.

A heat transfer medium made of a liquid such as oil or water such as heavy oil is injected into the circulation pipes 15, and a circulation pump 16 connected to the middle of the return pipe 15b of the circulation pipe 15 is used. It circulates.

A temperature sensor 17 such as a thermistor thermometer that constantly measures the temperature of the heat transfer medium flowing in the circulation pipe 15 is provided in the middle of the circulation pipe 15 at the position above the heat storage tank 2 in this embodiment. It is provided and controls the electric heater 11 described above. In addition, these circulation pipes 15
A heat exchanger 20 is connected between the outward pipe 15a and the return pipe 15b as shown in FIG.

This heat exchanger 20, as shown in FIG.
The tank 21 is provided with a coiled heat exchanger, and an inner flexible tube 22 formed in a coil shape and a coiled outer flexible tube 23 that surrounds the inner flexible tube 22 are provided in the tank 21.

The inner pipe 22 has a circulation pipe 1 at one end.
No. 5 outbound pipe 15a is connected and the tank 2
The return pipe 15b of the circulation pipe 15 is connected to the outlet at the bottom of the first unit. Further, the outer spiral pipe 23 is connected to a water supply pipe and is connected to a hot water supply pipe for supplying hot water to various places and a heat radiation pipe connected to a floor heating device.

The heat transfer medium in the circulation pipe 15 is
The inside of the tank 21 is circulated by the inner flexible pipe 22, and the inside of the tank 21 is discharged from the other end of the inner flexible pipe 22 to fill the inside with a heat transfer medium, and is returned to the circulation pipe 15 at the outlet provided at the bottom of the tank 21 to circulate. To do.

A temperature sensor is provided in the heat exchanger 20 to constantly measure the temperature of the heat transfer medium in the tank 21 and keep the temperature of the heat transfer medium constant. 16 controls are performed.

Next, the heat storage device 1 configured as described above.
The operation of heat storage in will be described. First, the heat dissipation panel section 3
The electric heater 11 provided in 2 is energized, and the pipe 8
Also, the panel plate 9 is heated through the mounting bracket 10 to start radiating heat and heat the heat storage material 4.

The heat storage material 4 is heated to a desired temperature of 100 ° C. or higher and controlled by a temperature sensor 5 or the like so as to maintain the temperature.

The heat transfer medium in the circulation pipe 15 provided in the heat collection panel section 33 is circulated by the circulation pump 16 and the heat accumulated in the heat storage material 4 in the heat storage tank 2 is transferred to the panel plate 14. Heat is absorbed through the heat transfer medium to warm the heat transfer medium, and the heat transfer medium is sent to the heat exchanger 20 from the outward pipe 15a.

In the heat exchanger 20, tap water or the like is supplied, heat exchange is performed, and hot water is obtained. Then, the return pipe 15b of the circulation pipe 15 causes the heat transfer medium to circulate in the heat storage tank 2 again, absorbs the heat of the heat storage material 4 through the heat collecting panel portion 33, and circulates to the outward pipe 15a side.

Therefore, in the heat storage device 1 thus constructed, the gravel is used as the heat storage material 4, and the gravel is heated to store heat. Is about twice the density and 1.
It is excellent at 6 times, it is easy to raise the heat storage temperature to 100 ° C. or more, and sufficient heat storage can be performed.

Further, according to the heat storage device 1, the heat storage temperature is extremely high and the heat storage amount is very high.
The volume for heat storage is small and space can be saved.

Further, since the heat storage material 4 is gravel, even if the heat storage tank 2 is constructed of concrete or the like, construction for waterproofing for water leakage is unnecessary, and the gravel is accumulated by using the foundation of the building. Therefore, the installation cost of the heat storage device 1 and the construction period can be shortened. In particular, the heat storage tank can be installed under the floor of a building constructed on a sloping ground such as a villa or a mountain villa.

Further, according to the heat storage device 1, the means for transferring heat is the heat radiation panel section 32 and the heat collection panel section 33 which are made of a copper plate. Conduction of heat from the material 4 to the heat collection panel 12 and heat transfer by convection, that is, transfer of heat can be efficiently performed.

Further, according to the heat storage device 1, in addition to the above effects, the heat transfer panel 31 in which the heat radiation panel section 32 and the heat collection panel section 33 are integrated is provided with the electric heater 11 via the heat transfer section 31a. Since the circulation pipe 15 is provided in parallel, the heat of the electric heater 11 is directly transferred to the circulation pipe 15 by the heat transfer portion 31a which is a copper plate, and hot water is obtained even when the heat storage material 4 is not sufficiently heated. be able to.

Further, the electric heater 11 provided in the heat radiation panel portion 32 has a structure of being inserted and fixed in the pipe 8 of the heat radiation panel portion 32, and the heater body is brought into direct contact with water as in the conventional water heat storage system. This heater will not be corroded and damaged because it is not used.

Further, since the heat storage material 4 is made of gravel,
It does not freeze even in winter or when it is unused in winter, and problems such as unusability and damage due to freezing that occur in conventional water heat storage systems do not occur.

Further, according to this heat storage device 1, since the heat storage function can supply heat regardless of the heat demand time zone, it is possible to supply heat even in the midnight time zone when heat demand is low. Therefore, the use of late-night power becomes effective, and it becomes possible to cover a large amount of heat demand with a low power charge.

Next, the heat storage device 40 of the second embodiment will be described. In the second embodiment described below, the same or equivalent components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 4, the heat storage device 40 of this embodiment has an electric heater 11 and a circulation pipe, which are the heating means of the same construction as the first embodiment, in the heat storage material 4 of the heat storage tank 2. The heat dissipation panel 41 in which the heat transfer pipes 115 that serve as the heat dissipation panel 41 are arranged in parallel, and the heat collecting panel section 3 in the first embodiment described above.
The structure is such that the heat collecting panel 12 provided with the circulation pipe 15, which is substantially the same as the structure of only No. 3, is buried.

The heat dissipation panel 41 has the same structure as the heat transfer panel 31 in the heat storage device 1 of the first embodiment described above, and the electric heater 11 and the heat transfer pipe 115 are mutually connected via the heat transfer section 41a. They are arranged substantially vertically so as to be parallel. A heat transfer medium equivalent to the heat transfer medium in the circulation pipe 15 is injected into the heat transfer pipe 115.

As shown in FIG. 4, the heat radiation panel 41 and the heat collection panel 12 are embedded in the heat storage material 4 so as to be parallel to each other at a predetermined interval.

Therefore, the heat storage device 40 of the second embodiment
According to this, similarly to the first embodiment described above, the heat of the electric heater 11 heats the heat storage material 4 by the heat radiation panel 41, the heat is stored in the heat storage material 4, and the heat collection panel 1
The heat of the heat storage material 4 is absorbed by the heat transfer medium in the circulation pipe 15 via 2.

Further, the heat storage device 40 has the above-mentioned first
Since the electric heater 11 and the heat transfer pipe 115 are arranged side by side on the heat dissipation panel 41 via the heat transfer part 41a as in the embodiment of FIG. Will be transferred to
Hot water can be obtained even when the heat storage material 4 is not sufficiently heated.

That is, the heat storage device 40 is provided with the heat storage material 4
Even when the heat stored in is reduced with time or when the heat storage material 4 is not sufficiently heated, by switching the circulation of the heat transfer medium from the circulation pipe 15 to the heat transfer pipe 115, optimal It is possible to obtain hot water having a temperature.

In each of the above embodiments, the heat dissipation panel section 3
2. An example has been described in which the heating means 11 provided on the heat dissipation panel 41 is an electric heater. However, the pipe 8 to which the electric heater is fixed uses solar heat or waste heat of a factory as a heat medium. However, in this case, there is an effect that the utility value for industrial use becomes high.

[0051]

As described above, in the heat storage device according to the present invention, the heat storage material is made of gravel, and the gravel is heated to store heat, so that the heat storage temperature is 100 ° C. or more due to the characteristics of the gravel. Can be easily raised to
There is an effect that a sufficient amount of heat can be stored in the heat storage tank.

Further, since the heat storage material is gravel, even if the heat storage tank is constructed of concrete or the like, the construction for waterproofing for water leakage is not required, and the gravel can be used by using the foundation of the building or the lower floor. Since it is possible to accumulate
The installation position of this heat storage device is not limited, and there are effects that the installation cost can be reduced and the construction period can be shortened.

Further, since the heat storage material is made of gravel, it does not freeze even in the winter or when it is unused in the winter, and it has an effect that it can be used all the year round.

According to this heat storage device, the heat storage temperature of the heat storage material can be maintained at an extremely high temperature, and the heat storage amount is very high, so that the same amount of heat can be obtained as in the conventional heat storage tank using water. In this case, there is an effect that the volume for heat storage, that is, the volume of the heat storage tank is small, and space can be saved.

Further, since the heat radiation panel and the heat collection panel are integrally formed and embedded in the heat storage material, and the heating means and the circulation pipe are arranged in parallel, the heat storage material is heated and at the same time the circulation pipe is also opened. It is possible to heat the heat storage material, and it is possible to obtain a heated heat transfer medium even if the heat storage material is not sufficiently heated, and it is possible to obtain desired heat at all times.

Further, in the heat storage device having a structure in which the heat radiation panel having the heating means and the heat transfer pipe arranged side by side and the heat collection panel having the circulation pipe are opposed to each other at a predetermined interval and are embedded in the heat storage material. , In addition to the above-mentioned effects, when the heat stored in the heat storage material becomes lower with time,
Even when the heat storage material is not sufficiently heated, by switching the circulation of the heat transfer medium from the circulation pipe to the heat transfer pipe,
There is an effect that hot water having an optimum temperature can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of a heat storage device according to the present invention.

FIG. 2 is a partially enlarged perspective view of the heat storage device according to the embodiment.

FIG. 3 is a schematic plan sectional view of the heat storage device according to the embodiment.

FIG. 4 is a schematic configuration diagram showing a second embodiment of the heat storage device according to the present invention.

[Explanation of symbols]

 1, 40 ... Heat storage device 2 ... Heat storage tank 4 ... Heat storage material 11 ... Heating means (electric heater) 12 ... Heat collection panel 15 ... Circulation pipe 32 ... Heat radiation panel section (Heat radiation panel) 33 ... Heat collection panel section (Heat collection panel) ) 41 ... Heat dissipation panel 115 ... Heat transfer pipe

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Bunpei Mochizuki 2-13-5 Sotokanda, Chiyoda-ku, Tokyo Tsuruya Building 8F, Fuji Environmental System Co., Ltd. (56) References , A)

Claims (2)

[Claims] 1. A box-shaped heat storage tank having a heat insulating property is filled with a heat storage material made of gravel , and a heat radiation panel and a heat collection panel integrally formed are embedded in the heat storage material, and the heat radiation panel is also provided. For heating the heat storage material provided in the
If, distribution and circulation pipe heat transfer medium consisting of liquid provided in the heat collection panel extending outside the heat storage tank circulating in parallel
A heat storage device characterized by being installed . 2. Gravel is placed in a box-shaped heat storage tank having heat insulation properties.
The heat storage material is filled with
When it is embedded facing the panel with a predetermined gap
By the way, the heat radiation panel has a heating means for heating the heat storage material.
A heat transfer medium consisting of a stage and a liquid circulates and extends outside the heat storage tank.
Heat transfer pipes are installed side by side, and the heat collecting panel has a liquid
Circulation in which the heat transfer medium consisting of circulates and extends outside the heat storage tank
A heat storage device characterized in that a pipe is provided.