JPH10220828A - Heat storage container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat storage container having the high performance of heat transfer characteristics by reducing the labor of replenishing a heat storage material to enhance the operational performance and by simplifying the structure of a container body to reduce cost, assuming that water is used as the heat storage material. SOLUTION: This container is equipped with a container body 1 inside of which a heat storage material S is stored, an endothermic heat exchanger 2 which consists of at least pipes and has a heating medium flow inside to heat exchange the heat storage material, and a radiating heat exchanger 3. The container body 1 is provided with the container body 1 which is formed into a box shape by a drawing work and has an opening part at the top surface, and with a cover body 4 which is fixed by being installed on the peripheral end of this container body by a caulking work to block a top surface opening part 1a of the container body. Each heat exchanger penetrates the side of the container body and is provided with connecting parts 6A and 6B which are installed by the caulking work.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat storage container used for, for example, a refrigeration cycle of an air conditioner and used for absorbing and releasing heat to and from a heat storage material.

[0002]

2. Description of the Related Art For example, a refrigeration cycle of an air conditioner used for general households is sometimes used in combination with a heat storage container. As the heat storage container, a material that causes a chemical change (for example, a hydrated salt) is used as a heat storage material, or a latent heat storage material (ice, paraffin, or the like) that performs a phase change is used.
Was used.

[0003] However, these heat storage materials have a small heat capacity, and therefore, there is a disadvantage that the container body for storing the heat storage material becomes large in order to secure a desired heat storage capacity. Furthermore, when using a heat storage material due to chemical change,
Since the volume of the heat storage material changes, a heat exchanger using plate fins cannot be used.

[0004] Therefore, the conventional heat storage heat exchanger cannot use a plate heat exchanger that is inexpensive and has good heat conductivity, has low heat conductivity, and is large in size.
Inviting higher costs.

[0005]

For these reasons,
Attempts have been made to use water as an alternative to the above heat storage materials. That is, if water is used, which is inexpensive and has a large heat capacity, and only utilization of sensible heat is considered, the cost can be reduced.

[0006] However, water as a heat storage material has the property of easily evaporating, so that it must be replenished frequently, which is troublesome. In addition, water has a large pressure (steam pressure) fluctuation, and it is necessary to use a pressure-resistant container which is not affected by the fluctuation. Manufacturing such a pressure-resistant container adversely affects the cost.

The present invention has been made in view of the above circumstances, and an object of the present invention is to improve workability by reducing the time for replenishing a heat storage material on the premise that water is used as the heat storage material. In addition to the above, it is an object of the present invention to provide a heat storage container having a high-performance heat transfer property by simplifying the structure of the container body to reduce the cost.

[0008]

According to a first aspect of the present invention, there is provided a heat storage container comprising a container body in which a heat storage material is stored, at least a pipe, and a heat medium therein. In a heat storage container provided with a heat exchanger that circulates and exchanges heat with a heat storage material in the container main body, the container main body is formed in a box shape by drawing and has an opening on an upper surface, and the periphery of the container main body is provided. The upper opening of the container body is closed by a lid attached and fixed to the end by caulking, and the heat exchanger includes a joint portion that penetrates the side surface of the container body and is attached by caulking. I do.

According to a second aspect of the present invention, in the heat storage container according to the first aspect, the heat storage material stored in the container body is water and is filled so as to have a predetermined gap from the upper surface of the container body. The lid closing the opening is provided with a safety valve for releasing high pressure when the pressure in the container body rises and for releasing low pressure when the pressure drops.

[0010] Claim 3 is Claim 1 and Claim 2
In the heat storage container described above, the heat exchanger is an endothermic heat exchanger that absorbs heat of a heat storage material, and is arranged at an upper portion of the container body.

[0011] Claim 1 and Claim 2
In the heat storage container described above, the heat exchanger is a heat radiation heat exchanger that radiates heat to a heat storage material, and is arranged at a lower part of the container body.

According to a fifth aspect of the present invention, in the heat storage container according to the second aspect, the heat storage material stored in the container body is water, and oil is mixed so that an oil film is formed on the surface of the water. Features.

By providing the means for solving the above-mentioned problems, in the first aspect of the present invention, an inexpensive material can be used as the caulking material, the processing cost can be reduced, and the cost can be reduced. The rigidity of the container body and the mounting strength of the lid and the joint to the container body are increased.

According to the second aspect of the present invention, the safety valve is canceled in both the pressurized state and the negative pressure state, thereby ensuring safety, and simplifying the pressure-resistant structure of the container body, thereby contributing to cost reduction.

According to the third aspect of the present invention, the endothermic heat exchanger is located near the water surface, and the endothermic heat exchanger is arranged at a favorable position where high-temperature water is substantially concentrated by natural convection at the time of heat absorption, so that heat exchange efficiency is improved. Is good.

According to the fourth aspect of the present invention, the heat radiating heat exchanger is disposed at a favorable position where the low-temperature water is substantially concentrated by natural convection at the time of heat radiation, so that heat exchange efficiency is good. According to the fifth aspect of the invention, by forming an oil film on the water surface, evaporation of water is suppressed, and replenishment becomes almost unnecessary, thereby improving workability.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described.
This will be described with reference to the drawings. As shown in FIG. 1, the heat storage container T is configured. In the figure, reference numeral 1 denotes a container body, which is formed in a box shape having an opening 1a on the upper surface by drawing.
A heat storage material S is stored inside the container body 1, and an endothermic heat exchanger 2 and a heat radiation heat exchanger 3 as heat exchangers are arranged, all of which are immersed in the heat storage material S.

The upper opening 1a of the container body 1 is closed by a lid 4, so that the container 1 is kept airtight. A safety valve 5 for releasing the pressurized and negative pressure in the container body 1 is attached to the lid 4.

The endothermic heat exchanger 2 is mounted on the upper side of the container body 1 via a joint 6A. The heat radiation heat exchanger 3 is attached to a lower portion of the side surface of the container body 1 via a joint 6B. All of them are securely sealed to the container body 1.

The general configuration of the heat storage container T has been described above. Next, individual components of the heat storage container T will be described in detail. The container body 1 is formed by deep drawing a metal plate having a predetermined thickness and has no seams at all. Therefore, it has sufficient rigidity with the minimum required thickness. Along with the peripheral end, a flange 1b for mounting the lid 4 is integrally formed as described later.

The heat storage material S is stored up to a position where its liquid level is close to the upper opening 1a of the container body 1 and does not contact the safety valve 5. The component of the heat storage material S is a mixture of water, ethylene glycol and oil. The ethylene glycol concentration is, for example, 30%, so that the antifreeze has a freezing temperature of about -20 ° C.

As shown in FIG. 7, as the heat storage material S, an ethylene glycol aqueous solution e in which ethylene glycol is mixed with water is formed, and occupies most of the heat storage material. An oil o having a low specific gravity is laminated on the upper surface of the ethylene glycol aqueous solution e. In other words, the ethylene glycol aqueous solution e is entirely covered with the thin oil film o.

Therefore, even if the temperature of the heat storage material S rises and the aqueous solution of ethylene glycol e tends to evaporate, the oil film o
Is prevented from evaporating. Only a very small amount of evaporated water dissolves in the oil film o, and there is almost no consumption due to actual evaporation.

The lid 4 for closing the upper opening 1a of the container body 1 is attached to the container body 1 as described below. That is, as shown in FIG. 2A, first, the container body 1 is formed with a flange portion 1b which is integrally bent in the horizontal and vertical directions along the periphery of the upper surface opening 1a. On the upper surface of the horizontal portion of the flange 1b, the peripheral end 4 of the lid 4
a is placed.

Since only the safety valve 5 is attached to the cover 4, a thin metal plate having a rigidity such that it does not deform under its own weight may be used. The peripheral end 4a of the lid 4 directly mounted on the flange 1b may be turned back to secure a predetermined plate thickness.

Next, as shown in FIG. 1B, the vertical portion of the container main body flange 1b is folded back and processed, and is superposed on the upper surface of the peripheral end 4a of the lid 4. That is, the container main body flange 1b is caulked with respect to the lid 4.

Finally, as shown in FIG. 3C, the crimped container body flange 1b and the lid peripheral end 4a are both joined together.
While squeezing diagonally upward to increase the swaging strength,
Improve the sealing effect.

In addition, in order to perform reliable caulking, in addition to folding back the peripheral end 4a of the lid 4, the peripheral end 4a of the lid is kept straight, and here, for example, a thin copper plate is used. The same effect can be obtained by laminating metal packings or applying a silicon-based coating agent to the peripheral end of the lid and then performing caulking.

The safety valve 5 is configured as shown in FIG. That is, 7A is an upper valve body, and a lower valve body 7B is connected to a lower portion of the upper valve body 7A to form an integrated valve body 7.

A semicircular projection 8 is projected along the peripheral surface of the upper valve body 7A, and a mounting part 9 whose hole is drawn up and formed is provided substantially at the center of the lid body 4. Mounting part 9
The peripheral surface of the upper valve body 7A is press-fitted and fixed therein. Therefore,
The mounting portion 9 is in close contact with the projection 8 and the peripheral surface of the upper valve body 7, and the sealing property with respect to the upper valve body peripheral surface is ensured.

As described above, since the safety valve 5 is press-fitted and fixed to the lid 4, if a pressure equal to or more than a predetermined pressure is applied to the safety valve along the axial direction, the protrusion 8 of the upper valve body 7A is formed.
May move through the mounting portion 9, and eventually the safety valve 5 may come out of the mounting portion 7.

At this time, the pressure is given by the area of the hole of the mounting portion 9 ×
It is set to be equal to or less than the internal pressure inside the container body 1 (below the breaking limit of the container body 1 and above the operating pressure of the weight 14 described later).

In the safety valve 5, the upper side of the upper valve body 7A projects upward from the lid body 4 and is in the atmosphere, and the lower side of the mounting portion 9 and the lower valve body 7B are below the lid body 4. It is located in the main body 1.

The upper valve body 7A has an upper surface opening closed by an upper surface plate 10 and a bottom portion formed by a valve seat 11.
It has a space chamber 12 inside. Projection 1 on the peripheral surface of top plate 10
0a is protruded, and is press-fitted into a concave portion provided at the upper end of the upper valve body 7A. For this reason, when a predetermined pressure or more is applied to the upper surface plate 10, the upper surface plate comes off the upper valve body 7A. Further, a plurality of pressure relief holes 13 are provided in the upper surface plate 10 so that the atmosphere and the space chamber 12 are communicated.

A weight 14 is accommodated in the space chamber 12 of the upper valve body 7A. The weight 14 is formed of, for example, a stainless steel material, and a coating film 14a is formed of a plastic material or a rubber material except for the entire peripheral surface and the central portion of the lower surface. Coating film 14
The reason a is provided is to make the sliding (movement) of the weight 14 in the space chamber 12 smooth.

The thickness and diameter of the weight 14 are slightly smaller than the height and diameter of the space chamber 12, respectively.
A through hole 15 penetrating the upper and lower surfaces is provided at a central portion along the axis.

A reed valve 16 is attached to the center of the lower surface of the weight 14. This reed valve 16 is similar to that shown in FIG.
As shown in (B), it is made of a thin leaf disk and has an annular notch 17 at the center. The circular diameter of the notch 17 is set to be larger than the diameter of the through-hole 15, and the center of the notch faces the center of the through-hole 15, and the outer periphery of the notch 17 extends through the lower surface of the weight 14. Hole 15
Mounted around.

As shown in FIG. 3 again, an upper concave portion 18 having a diameter larger than the diameter of the reed valve 16 is provided at the center of the valve seat 11 of the upper valve body 7A on the upper surface side which is the space chamber 12 side. Can be Further, on the lower surface side facing the lower valve seat 7B,
A lower surface concave portion 19 having a larger diameter than the upper surface concave portion 18 is provided. Between these recesses 18 and 19, a valve hole 20 having the same axis as each recess and having a smaller diameter than the recesses is provided.

The lower valve body 7B has only the upper surface opened, and has the same diameter as the peripheral surface of the valve seat 11 of the upper valve body 7A. The diameter from the center to the lower side is smaller than the upper side, and the diameter of the lower side is substantially the same as the diameter of the lower surface recess 19 of the upper valve body valve seat 11.

An inwardly protruding projection 21 is integrally provided on the upper portion of the lower valve body 7B, and is press-fitted into a concave portion 22 provided on the peripheral surface of the upper valve body valve seat 11. That is, also in this case, when a force equal to or more than a predetermined pressure is applied, the upper valve body 7A and the lower valve body 7B are separately disassembled.

When the lower valve element 7B is connected to the upper valve element 7A, the upper opening of the lower valve element 7B is closed, and a space 23 is formed therein. A guide hole 24 is provided in the side surface portion, and communicates the space chamber 23 with the inside of the container body 1.

A stopper 25, which is a heavy body, is accommodated in the internal space chamber 23 of the lower valve body 7B. This stopper 25
In the normal state, the upper end is inserted into the lower surface concave portion 19 of the upper valve body valve seat 11, and is spaced from the valve hole 20 by a predetermined distance to open the valve hole. In other words, the stopper 2
Depending on the position of 5, the upper surface thereof abuts against the lower surface concave portion 19 so that the valve hole 20 can be closed.

As shown in FIG. 1 again, the endothermic heat exchanger 2 disposed in the upper part of the container body 1 is formed by bending a pipe into a U-shape, and is formed horizontally so as to be parallel to the water surface of the heat storage material S. Be placed. Inside the container body 1, a plurality of fins f are provided at predetermined intervals to enhance the heat exchange property.

The end of the endothermic heat exchanger 2 protrudes out of the container body 1 and is connected to a refrigeration cycle circuit described later. Therefore, the circulation of the refrigerant is controlled inside the endothermic heat exchanger 2, so that the refrigerant exchanges heat with the heat storage material S and absorbs heat from the heat storage material.

The heat-radiating heat exchanger 3 disposed in the lower part of the container body 1 is formed by bending a pipe into a U-shape, and is disposed horizontally in parallel with the bottom surface of the container body 1. An end of the heat radiation heat exchanger 3 projects outside the container body 1 and is connected to a refrigeration cycle circuit described later. Therefore, the heat radiation heat exchanger 3
The circulation of a refrigerant (which is a heating medium at this time) is controlled inside, heat exchanges with the heat storage material S, and heat is released to the heat storage material.

The heat radiation heat exchanger 3 is different from the heat absorption heat exchanger 2 only in the form of a pipe in order to suppress the heat radiation from the refrigerant in the heat radiation heat exchanger 3. This is because the amount of heat released from the refrigerant to the heat storage material S may be about 10 Wh per hour.
This is to prevent the refrigerant from radiating heat more than necessary in the heat radiation heat exchanger 3 when heat is stored while performing the air conditioning operation, and the efficiency of the air conditioning operation is not reduced.

As shown in FIG. 5, the refrigeration cycle circuit is configured. In the figure, reference numeral 30 denotes a two-cylinder compressor. A four-way valve 32 is connected to a refrigerant pipe P connected to the discharge part via a cycle on-off valve 31. Four-way valve 32
, The indoor heat exchanger 33, the electronic automatic expansion valve 34, and the outdoor heat exchanger 35 are sequentially communicated with each other.
The suction port of the compressor 30 is connected from the second connection port through the suction cup 36.

On the other hand, one end of a heat radiation circuit 37 is branched between the discharge part of the compressor 30 and the cycle on-off valve 31. The heat radiation circuit 37 includes a heat radiation on-off valve 38 and a heat radiation heat exchanger 3 in the heat storage container T, and the other end is connected between the cycle on-off valve 31 and the four-way valve 32. .

One end of a heat absorbing circuit 40 branches between the indoor heat exchanger 33 and the electronic automatic expansion valve 34. The heat absorbing circuit 40 includes a heat absorbing opening / closing valve 41, a heat absorbing heat exchanger 2 and an auxiliary suction cup 42 in the heat storage container T, and the other end thereof includes the suction cup 36 and the compressor 30 suction part. Connected between

A check valve 43 is provided on the suction side of the compressor 30 to which the other end of the heat absorption circuit 40 is connected, and this is a valve for cooling the refrigerant from the auxiliary suction cup 42 to the suction part of the compressor 30. Allow the flow, suction cup 36
The flow to is regulated.

As shown in FIG. 1 again, the heat-absorbing and heat-dissipating heat exchangers 2 and 3 ensure the sealing performance with respect to the container body 1 and also prevent the pipes constituting each heat exchanger from being damaged due to run-out or vibration. To prevent this, the joints 6A, 6
Attached via B.

FIG. 6 illustrates a procedure for attaching the joints 6A and 6B to the container body 1. In addition, since the above-mentioned heat absorption / radiation heat exchangers 2 and 3 use the same form of pipe, both joint portions 6A and 6B have exactly the same configuration.

First, as shown in FIG. 5A, the joints 6 are attached to the pipes constituting the heat absorbing and radiating heat exchangers 2 and 3.
A and 6B are inserted, and the joint edge and the heat exchanger are attached and fixed at predetermined positions over the entire circumference by, for example, brazing.

Each of the joints 6A and 6B has a flange portion 26 which is in close contact with the outer surface of the container body 1, and engages with a mounting hole 27 provided in the container body 1 and engages with the engaging projection 28 which is inserted into the container body. Having.

Next, as shown in FIG. 7B, the engaging projection 28 inserted into the container body 1 is bent to be in close contact with the inner surface of the container body. That is, the crimping process is performed so that the side wall of the container main body is clamped and fixed together with the flange 26 that is in close contact with the outer surface of the container main body 1.

The heat absorbing and radiating heat exchangers 2 and 3 are relatively easily attached to the container body 1 by the joints 6A and 6B, so that the workability is good and the sealing property to the container body 1 is ensured.

This is a refrigeration cycle equipped with the heat storage container T constructed as described above. When the cooling operation is performed, the cycle on-off valve 31 of the refrigeration cycle circuit shown in FIG. 38 and the heat absorbing on-off valve 41 are closed. That is, without introducing the refrigerant to the heat storage container T,
The heat storage / release function in the heat storage container T is not performed.

When the heating operation is performed, the on-off valve 41 for heat absorption of the refrigeration cycle circuit shown in FIG. 5 is closed, and the on-off valve 38 for heat radiation is opened. Therefore, the compressor 30 and the heat radiating circuit 37 are directly communicated with each other, and the refrigerant (here, the heating medium) discharged from the compressor is guided to the heat radiating circuit 37, and from the heat radiating heat exchanger 3 to the container main body 1. To the heat storage material S.

At the start of heating operation or at the time of defrosting operation, etc., the heat absorbing / closing valve 41 of the refrigeration cycle circuit is opened to guide the refrigerant to the heat storage container T, thereby performing the heat absorbing action in the heat storage container T. Use

When the air-conditioning operation for cooling and heating is not performed, heat may be stored in the heat storage container T using late-night electric power. In this case, only the radiation on-off valve 38 is opened,
The cycle on-off valve 31 and the heat absorption on-off valve 41 are closed.

In the heat storage container T, sensible heat of water is used as the heat storage material S, and the water is converted to warm water to store heat. The configuration of the heat storage container T is simple and can be provided at a low price, thereby contributing to a reduction in cost, as well as obtaining high heat storage performance.

Further, while the heat radiation heat exchanger 3 is arranged at the lower part of the container body 1, the low-temperature water as the heat storage material S is almost concentrated and guided to the lower part of the container body 1 by natural convection. 3, heat exchange is efficiently performed.

In the heating operation, when the outside air temperature is low and the condensing pressure of the refrigerant is hard to increase, the heat absorbing opening / closing valve 41 is opened to guide the refrigerant to the heat absorbing circuit 40 in parallel with the heating operation. The low-temperature refrigerant guided to the endothermic heat exchanger 2 exchanges heat with the heat storage material S, which is high-temperature water, and absorbs heat.

The heat-absorbing heat exchanger 2 is arranged on the upper part of the container body 1, while the high-temperature water as the heat storage material S is almost concentrated and guided to the upper part of the container body 1 by natural convection.
Exchange with the heat is performed efficiently.

As shown in FIG. 8, the safety valve 5 has a relatively low pressure of about 5 KMp in the container body 1 and a weight 14.
Rises to open the valve hole 20 and release the internal pressure to the outside of the container body 1 through the safety hole 5 such as the valve hole and the pressure relief hole 13.

That is, assuming that the weight of the weight 14 is MKgf and the diameter φD of the valve hole 20, M ≦ valve hole area {π · (2 / D) ² } × pressure at pressure relief (5 KPa). By setting the conditions (1) and (2), if the pressure inside the container body 1 becomes equal to or higher than the predetermined pressure, the pressure is immediately released via the safety valve 5 and sufficient safety is secured.

For some reason, the weight 14 is caught and the valve hole 20 is kept closed, so that the safety valve 5 may not function. At this time, the pressure inside the container body 1 becomes abnormally high, but before the container body is broken, the safety valve 5
And release the internal pressure by opening the mounting portion 9 of the lid.
In this way, the heat storage container T is doubly protected from high pressure.

On the other hand, the temperature inside the container body 1 may drop extremely, and the heat storage material S may freeze. If the container main body 1 is a completely sealed structure, the inside of the main body becomes negative pressure and contracts and deforms, leading to destruction.

However, in the heat storage container T, as shown in FIG. 9, the reed valve 16 provided in the safety valve 5 is operated by receiving a negative pressure, and is located in the upper recess 18. The through hole 15 provided in the weight 14 is opened, and the external air is released from the pressure relief hole 13, the through hole 15, and the safety valve 5 such as the valve hole 20.
Through the container body 1.

Therefore, even if the heat storage material S freezes, a negative pressure on at least the container body 1 is prevented, and the heat storage material S does not break. For example, the heat storage container T may fall over during transportation of the air conditioner.
At this time, as shown in FIG.
The stopper 25 accommodated in B moves with the weight 14 in position, and in particular, the stopper 25 enters the lower surface concave portion 19 to close the valve hole 20.

That is, the stopper 25 maintains airtightness in the container main body 1 and reliably prevents the heat storage material S from flowing out to ensure safety. In the above-described embodiment, heat is stored by the heat-radiating heat exchanger 3. However, the present invention is not limited to this. A separate heater may be provided, and heat may be stored by using both of them. .

In this case, the above-mentioned heater is attached to the lower part in the container main body or to the outer bottom surface, and the heat radiation heat exchanger 3 is arranged above the container main body 1 and below the heat exchanger 2 for heat absorption.

In this way, at the time of starting heating, which requires a large amount of heat, the heat storage material S is heated by the heater.
Is heated and the amount of heat is utilized. Then, for example, during a defrosting operation sufficient with a certain amount of heat, only a part (upper part) of the heat storage material S is heated by the heat radiation heat exchanger 3 disposed above while suppressing natural convection. Utilizes the amount of heat. Therefore, heat storage and use of heat storage can be performed efficiently.

As the heat storage material S, the oil o was mixed with the ethylene glycol aqueous solution e, but the present invention is not limited to this. Instead of the oil, a substance that does not mix with water or a material having a specific gravity lower than that of the ethylene glycol aqueous solution is used. A substance or a substance that diffuses on a water surface to form a film may be used.

[0075]

As described above, according to the first aspect of the present invention, the container main body is formed into a box shape by drawing, and the lid is attached to the container main body by caulking to fix the upper opening of the container main body. It is closed, and the joint part of the heat exchanger is attached to the container body by caulking, so inexpensive materials can be used as caulking material, processing costs are reduced, cost reduction is achieved, and the rigidity of the container body and the container body This increases the strength of attachment between the lid and the joint with respect to, and has the effect of improving safety.

According to the second aspect of the present invention, the heat storage material is filled with water so as to have a predetermined gap from the upper surface of the container main body, and the lid is relieved of high pressure when the pressure in the container increases and low pressure when the pressure decreases. Since the safety valve for releasing the pressure is provided, the safety valve is canceled in both the pressurized state and the negative pressure state, and the safety of the container body is ensured, and the pressure-resistant structure can be simplified, which contributes to cost reduction.

According to the third aspect of the present invention, the endothermic heat exchanger for absorbing the heat of the heat storage material is mounted on the upper portion of the container body.
The heat-absorbing heat exchanger is disposed at a favorable position where high-temperature water is substantially concentrated by natural convection during heat absorption, and heat exchange efficiency is good.

According to the fourth aspect of the present invention, since the heat radiating heat exchanger for radiating heat to the heat storage material is attached to the lower portion of the container body,
Since the heat radiating heat exchanger is disposed at a favorable position where the low-temperature water is almost concentrated by natural convection during heat radiation, heat exchange efficiency is good.

According to the fifth aspect of the present invention, the heat storage material stored in the container body is water, and an oil film is formed on the water surface.
Evaporation of water is suppressed by the oil film, and almost no replenishment is required, thereby improving workability.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a heat storage container, showing one embodiment of the present invention.

FIGS. 2A to 2C show the same embodiment;
The figure explaining the attachment procedure to a container main body of a lid body in order.

FIG. 3 is a longitudinal sectional view of the safety valve, showing the embodiment.

FIG. 4A is a front view of the reed valve, showing the embodiment. (B) is a side view of a reed valve.

FIG. 5 is a configuration diagram of a refrigeration cycle including a heat storage container according to the embodiment.

FIGS. 6A and 6B show the same embodiment;
The figure explaining the attachment procedure to the container main body of a heat exchanger joint part.

FIG. 7 is a diagram illustrating a state of a heat storage material according to the embodiment.

FIG. 8 is a view showing the same embodiment and is a view for explaining the internal state of the safety valve when the pressure inside the container body increases.

FIG. 9 is a view showing the same embodiment and is a view for explaining the internal state of the safety valve when the inside of the container body is at a negative pressure.

FIG. 10 is a view showing the same embodiment and is for explaining an internal state of the safety valve when the container body falls down.

[Explanation of symbols]

 S: heat storage material, 1: container body, 1a: top opening (of container body), 4: lid, 6A, 6B: joint, 5: safety valve, 2: heat absorption heat exchanger, 3: heat dissipation heat exchanger . e: ethylene glycol aqueous solution, o: oil film.

Claims (5)

[Claims] 1. A heat storage container comprising: a container main body in which a heat storage material is stored; and a heat exchanger comprising at least a pipe, through which a heat medium flows and exchanges heat with the heat storage material in the container main body. The container body is formed in a box shape by drawing and has an opening on the upper surface, and the upper opening of the container body is closed by a lid attached and fixed to the peripheral end of the container body by caulking. The heat storage container, wherein the heat exchanger integrally includes a joint portion that penetrates a side surface of the container body and is attached by caulking. 2. The heat storage material stored in the container main body is water, and is filled so as to have a predetermined gap with the upper surface of the container main body. 2. The heat storage container according to claim 1, further comprising a safety valve for releasing a high pressure when the internal pressure rises and releasing a low pressure when the pressure decreases. 3. The heat storage container according to claim 1, wherein the heat exchanger is an endothermic heat exchanger that absorbs heat of a heat storage material, and is disposed at an upper portion of the container body. 4. The heat storage container according to claim 1, wherein said heat exchanger is a heat radiation heat exchanger for radiating heat to a heat storage material, and is disposed at a lower portion of the container body. 5. The heat storage container according to claim 2, wherein the heat storage material stored in the container body is water, and oil is mixed so that an oil film is formed on the surface of the water.