JPH08219500A - Latent heat storing device - Google Patents

Abstract

PURPOSE: To improve a thermal efficiency and facilitate a handling of a latent heat storing device by a method wherein a capsule with a sealingly stored latent heat storing material is arranged around a cooling coil installed in a heat storing tank. CONSTITUTION: A heat storing tank 2 is connected to a cold heat medium input means 1 comprised of a freezing cycle system, and a cold heat output means 3 is connected to the tank 2. The heat storing tank 2 is filled with brine. In addition, a cooling coil 11 is installed within the tank 2, and a capsule 12 having latent heat storing material S enclosed therein is arranged around the cooling coil 11. With such an arrangement, cold heat is supplied to the tank 2 with the cold heat medium input means 1. Then, in the heat storing tank 2, the latent heat storing material S within the capsule 12 is cooled in the case of storing heat, the liquid is changed to solid phase. In addition, during heat radiation, latent heat storing material S within the capsule 12 is changed from its solid state to its liquid state and cooled. This cooled brine is supplied to a cold heat medium output means 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a latent heat storage device which stores cold heat and uses the cold heat as a heat source.

[0002]

2. Description of the Related Art In recent years, cold heat is stored by a refrigerator by effectively utilizing nighttime electric power, and the cold heat is stored in a latent heat storage material such as brine or water filled in a heat storage tank, and during the daytime, the latent heat storage material is stored. A latent heat storage device that uses the latent heat of the above as a load for an air conditioning system or the like is in the limelight. Generally, the heat storage methods of such a latent heat storage device are classified into three types: a dynamic ice making method, a static ice making method, and a capsule method.

The dynamic ice making method is a method in which ice is made by an ice making machine or the like and the ice is stored in a heat storage tank. The static ice making method is a method of producing ice on an ice making coil and accumulating the ice on the coil. The capsule system is a system in which a latent heat storage material is enclosed in a capsule and the latent heat is stored by cooling the capsule with brine cooled by a brilliantler.

FIG. 27 shows an air conditioning system using a dynamic ice making latent heat storage device. In the figure, reference numeral 1
Reference numeral 01 is a cooling / heating medium inputting means comprising a refrigeration cycle system. The cooling / heating medium inputting means 101 is connected to a heat storage tank 103 via an ice making machine 102, and further the cooling / heating medium output means 104 is connected to the heating / storage tank 103. ing. A heat pump type is adopted as the cooling / heating medium input means 101 composed of the above refrigeration cycle system, and an evaporator 105, an accumulator 106, a compressor 107, an air-cooling type condenser 108, a liquid receiver 109, an expansion valve 110, and a refrigerant circulation pipe. It is arranged on the path 111. Further, the cooling / heating medium output means 104 is composed of a closed circuit 112 containing water, a brine pump 113 is interposed in the closed circuit 112, and a load 115 is connected to the closed circuit 112.

The ice maker 102 and the heat storage tank 103 are filled with water, and at the time of heat storage, the cold heat medium input means 10
1, the cold heat is supplied to the ice making machine 102, and the ice making machine 102
Then, the water is cooled, and the phase changes from liquid to solid ice. The ice is transported to the heat storage tank 103 and accumulated therein. In this case, ice becomes the latent heat storage material. At the time of heat radiation, solid ice changes to a liquid, the temperature of the water in the heat storage tank 103 decreases, and low-temperature water is conveyed to the load 115 via the closed circuit 112, and the load 115 is cooled.

FIG. 28 shows an air conditioning system using a latent heat storage device of the static ice making system. In the figure, reference numeral 2
Reference numeral 01 is a cooling / heating medium inputting means comprising a refrigerating cycle system, and a cooling storage tank 202 is connected to the cooling / heating medium inputting means 201,
Further, the heat storage tank 202 is connected with a cold heat medium output means 203. A heat pump type is adopted as the cold heat medium input means 201 composed of the refrigeration cycle system, and has the same structure as the cold heat medium input means 101 used in the latent heat storage device of the dynamic ice making system. Cooling medium output means 20
3 comprises a closed circuit 204 filled with water, and a brine pump 205 is interposed in the middle of the closed circuit 204, and the closed circuit 2
A load 206 is connected to 04. The evaporator 2
01A consists of a direct expansion type coil.

The heat storage tank 202 is filled with water, and at the time of heat storage, heat is taken from the water in the heat storage tank 202 by the vaporizing action of the refrigerant of the evaporator 201A by the cold heat medium input means 201, and the evaporator is evaporated. The liquid on the coil of 201A is cooled and the liquid changes to ice. Ice is generated and grows on the coil of the evaporator 201A. In this case, the coil of the evaporator 201A also serves as an ice making coil, and the ice grown on this ice making coil serves as a latent heat storage material.

At the time of heat radiation, solid ice changes into liquid, the temperature of the water in the heat storage tank 202 decreases, and low-temperature water is conveyed to the load 206 through the closed circuit 204, and the load 206 is cooled. . FIG. 29 shows an air conditioning system using a latent heat storage device of the capsule ice making system. In the figure, reference numeral 301
Is a cooling / heating medium input means composed of a refrigeration cycle system, and a chiller medium 302 is connected to this cooling / heating medium input means 301.
It is connected to the heat storage tank 304 via. Heat storage tank 304
Brine is filled therein, and a large number of capsules 304A enclosing the latent heat storage material are accommodated.

A brine pump 305 and a brine tank 306 are provided in the middle of the brine circulation circuit 303. Cold heat medium input means 3 comprising the above refrigeration cycle system
01 is a heat pump type, and is a cold heat medium input means 101 used in a dynamic ice making system latent heat storage device.
It has the same structure as. Three-way valves 307 and 308 are interposed in the middle of the brine circulation circuit 303, and the three-way valve 30
Cooling medium output means 309 is branched from 7, 308.
The cooling medium output means 309 is a closed circuit 310 containing brine.
And a load 312 is connected to the closed circuit 310 via a heat exchanger 311.

When the heat is stored, the cold heat medium input means 30
By the vaporizing action of the refrigerant in the evaporator 301A by 1, the heat is taken from the brine in the brilliantler 302, and the brine is cooled. The cooled brine is carried into the heat storage tank 304 via the brine circulation circuit 303. Heat storage tank 304
Inside, the latent heat storage material in the capsule 304A undergoes a phase change from a liquid to a solid. In this case, the capsule 304
The latent heat storage material in A serves as a latent heat storage material.

At the time of heat radiation, the latent heat storage material which is a solid phase-changes to a liquid, the temperature of the brine in the heat storage tank 304 becomes low, and this low temperature brine is conveyed to the heat exchanger 311 via the closed circuit 310, and the heat is exchanged. Heat exchange is performed in the exchanger 311,
The cold water pump 313 is carried on the cooling circuit 314 to cool the load 312.

[0012]

However, the above-mentioned three conventional latent heat storage devices have the following problems. First, in the latent heat storage device of the dynamic ice making system, since the ice is mechanically conveyed to the heat storage tank 103, the device becomes complicated and troubles such as ice accretion on the surface of the coil of the evaporator 105, the piping of the ice making machine 102, etc. Easily occurs, the heat storage tank 103
Internally, there is a problem that if ice is stored for a long time, it may be difficult to thaw, because of problems such as generation of large ice blocks.

Further, the static ice storage type latent heat storage device is a system in which ice is adhered to the direct expansion type coil of the evaporator 201A, but it is difficult to make the ice making and the defrosting uniform on this coil, and the bridging is performed. The phenomenon occurs. Here, the bridging phenomenon is a phenomenon in which ice on adjacent portions of the coil is connected to each other, and means that the surface area of ice is reduced and the melting speed is reduced. Also, since troubles such as coil damage due to over- or total ice making may occur, IP
F (ICE PACKING FACTOR: ice filling rate, given by IPF = ice volume / (ice volume + water volume) × 100) cannot be increased. That is, the heat storage tank 2
There is a problem that the volume of 02 becomes large and the installation area becomes large.

Then, the capsule type latent heat storage device is
The heat is transferred by the brine to the latent heat storage material enclosed in the capsule 304A through the brine circulation circuit 303 and stored therein. Unlike ice as a latent heat storage material generated in a random thickness on the coil of the static ice storage latent heat storage device, solidification action of the latent heat storage material occurs in the capsule 304A, so that the area for accumulating latent heat is It is fixed and easy to handle, but the use of brine as an intermediate heat transfer medium reduces the thermal efficiency, and since capsules are used, the generation efficiency during the phase change of the latent heat storage material Is a problem.

The present invention has been made to solve the above-mentioned problems, and an object thereof is to provide a latent heat storage device which can improve heat efficiency and can be easily handled.

[0016]

According to the first aspect of the present invention,
A cold heat medium input means for supplying cold heat, a heat storage tank containing brine or water, a cooling coil connected to the cold heat medium input means and provided in the heat storage tank, and arranged around the cooling coil to store latent heat storage heat. It is characterized by comprising a capsule enclosing the material and a cooling / heating medium output means connected to the heat storage tank.

According to a second aspect of the invention, in the first aspect of the invention, the cooling coil is an evaporator of a refrigeration cycle system. The invention described in claim 3 is claim 1,
In the latent heat storage device according to any one of 2 above, the capsule is arranged around the cooling coil in close contact with the cooling coil.

According to a fourth aspect of the present invention, in the latent heat storage device according to any one of the first, second and third aspects, the capsule is composed of a pair of cases having opposing surfaces sandwiching the cooling coil. And According to a fifth aspect of the present invention, in the latent heat storage device according to any one of the first, second, third, and fourth aspects, the pair of cases are integrally configured to be openable and closable.

The invention according to claim 6 is the invention of claims 1, 2, 3,
The latent heat storage device according to any one of 4 and 5 is characterized in that the capsule has an elongated shape along the longitudinal direction of the cooling coil. The invention according to claim 7 is the latent heat storage device according to any one of claims 1, 2, 3, 4, 5 and 6, wherein a three-dimensional capsule laminate is housed in the heat storage tank. Is characterized by being constituted by laminating a capsule layer having one or more capsules mounted on the cooling coil along the longitudinal direction of the cooling coil.

The invention as defined in claim 8 is defined in claims 1, 2, 3,
In the latent heat storage device according to any one of 4, 5, 6, and 7, a brine flow path is formed between adjacent capsule layers, and a brine direction reversal portion that is continuous with the brine flow path is formed at one end of the capsule layer. At the other end of the capsule layer arranged across the brine flow path of the capsule layer, a brine direction reversal portion is formed that is continuous with the brine flow path, and the inlet / outlet port of the heat storage tank is connected to the cooling / heating medium output means. It is characterized by

The invention according to claim 9 is the invention as defined in claims 1, 2, 3,
The latent heat storage device described in 4, 5, 6, 7, and 8 is characterized in that the capsules arranged in the same capsule layer are integrated by a fastener. According to a tenth aspect of the invention, in the latent heat storage device according to the first, second, third, fourth, fifth, sixth, seventh, eighth and ninth aspect, the cooling / heating medium output means is a closed circuit.

[0022]

According to the first aspect of the invention, cold heat is supplied to the heat storage tank by the cold heat medium input means. In the heat storage tank, the latent heat storage material inside the capsule is cooled during heat storage,
Phase change from liquid to solid. During heat dissipation, the latent heat storage material in the capsule undergoes a phase change from solid to liquid, and the brine is deprived of heat and cooled. This cooled brine is supplied to the cooling / heating medium output means.

According to the second aspect of the present invention, since the cold heat medium input means is the evaporator of the refrigeration cycle means, cold heat is supplied to the latent heat storage material in the capsule by the vaporizing action of the evaporator. In the invention according to claim 3, since the capsule is arranged around the cooling coil in close contact with the cooling coil, heat transfer efficiency from the cooling coil to the capsule is ensured.

According to the fourth aspect of the present invention, the capsule is composed of a pair of cases having opposing surfaces sandwiching the cooling coil, so that the work for attaching the capsule to the cooling coil becomes easy. In the invention according to claim 5, since the pair of cases are integrally configured to be openable and closable, the work for attaching the capsule to the cooling coil is facilitated.

In the invention according to claim 6, since the capsule has an elongated shape along the longitudinal direction of the cooling coil, uneven solidification of the latent heat storage material in the capsule is prevented, and accordingly, the latent heat storage material is not solidified. The expansion of the uniformly solidified latent heat storage material is prevented, and the thickness of the capsule is reduced. In the invention according to claim 7, since the shape of the capsule is a three-dimensional capsule laminated body, the capacity of the capsule accommodated in the heat storage tank is secured in a wide region, and the IPF becomes high.

In the invention according to claim 8, the brine is allowed to flow in a meandering manner by the brine flow path and the brine direction reversing part, and at the time of heat storage, the brine is circulated to agitate the inside of the heat storage tank to ensure the operation. Uniform heat storage (solidifying the entire latent heat storage material uniformly) is performed, and heat storage efficiency can be improved and heat storage can be made uniform. Also, when radiating heat,
The efficiency of heat dissipation is improved.

In the ninth aspect of the present invention, since the capsules arranged in the same capsule layer are integrated by the fastener, a plurality of capsules are integrated. Claim 1
In the invention described in 0, since the cooling / heating medium output means is a closed circuit, the brine circulates during heat storage, improving heat storage efficiency,
The heat storage can be made uniform. In addition, the efficiency of heat dissipation is improved during heat dissipation.

[0028]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 26 show a latent heat storage device according to an embodiment of the invention described in claims 1 to 9. In FIG. 1, reference numeral 1 is a cooling / heating medium input means composed of a refrigeration cycle system, and a cooling storage tank 2 is connected to the cooling / heating medium input means 1.
Further, a cold heat medium output means 3 is connected to the heat storage tank 2.

A heat pump type is adopted as the cooling / heating medium input means 1 composed of the above refrigeration cycle, and an evaporator 4, an accumulator 5, a compressor 6, an air-cooled condenser 7, a liquid receiver 8 and an expansion valve 9 are provided. It is arranged on the refrigerant circulation pipeline 10. The evaporator 4 has a meandering shape and is configured as a direct expansion type cooling coil 11 which is laminated three-dimensionally and is three-dimensionally arranged. Copper is used as the material of the cooling coil 11. Since the cooling coil 11 is the evaporator 4 of the refrigeration cycle system, the cooling efficiency in the heat storage tank 2 can be increased.

The heat storage tank 2 is filled with brine.
Brine is an antifreeze liquid that does not become solid even when cooled, and is used as a heat transfer medium for transferring heat without changing its phase. For example, an ethylene glycol aqueous solution is used as the brine. Note that the solution containing calcium chloride or the like as brine may corrode the cooling coil 11, and thus its use is not preferable.

A plurality of rectangular parallelepiped capsules 12 are arranged around the cooling coil 11 along the longitudinal direction thereof, and the plurality of capsules 12 form a three-dimensional capsule laminate 13.
(The structure will be described later) is configured. 12 capsules each
A latent heat storage material S is enclosed in. Polyethylene is used as the material of the capsule 12. Latent heat storage material S
Is a liquid at room temperature, and when cold heat is applied, it is stored as latent heat to become a solid. For example, as the latent heat storage material S, a solution containing a hydrated salt of sodium sulfate is used.

Since the cooling coil 11 and the capsule 12 are immersed in the brine of the heat storage tank 2, heat dissipation from the cooling coil 11, the capsule 12 and the latent heat storage material S can be prevented and the heat storage efficiency can be improved. The cooling medium output means 3 is
It consists of a closed circuit 14 through which brine flows, one end of the closed circuit 14 is connected to the outlet 2A of the heat storage tank 2, and the other end of the closed circuit 14 is connected to the inlet 2B of the heat storage tank 2. Closed circuit 1
A brine pump 15 is interposed in the middle of 4, and a bypass line 16 is connected in parallel, and a three-way valve 17 is provided at a connecting portion between one end of the bypass line 16 and the closed circuit 14.

A heat exchanger 18 is provided on the closed circuit 14, and a cooling water circulation circuit 19 for circulating cooling water is connected to the heat exchanger 18. A chilled water pump 20 and a load 21 to be cooled are provided in the middle of the chilled water circulation circuit 19. Next, the capsule 12 will be described in detail with reference to FIGS. The capsule 12 is shown in FIGS. 2 and 3 and comprises a pair of substantially symmetrically shaped cases 22, 23.
It is composed of The cases 22 and 23 are configured as one article that can be opened and closed. The cooling coil 11 is adapted to be tightly fitted in the wire grooves 22B and 23B formed in the longitudinal direction of the inner surfaces 22A and 23A facing each other of the cases 22 and 23, and the case 22 in a folded and closed state. ，
The cooling coil 11 is fixed to 23 and sandwiched in a close contact state, which state is shown in FIG. Since the cases 22 and 23 of the capsule 12 can be opened and closed, the capsule 1
The work for attaching 2 to the cooling coil 11 can be facilitated.

In this way, the capsule 12 is arranged in close contact with the periphery of the cooling coil 11. This allows
The efficiency of heat transfer from the cooling coil 11 to the capsule 12 can be ensured. The capsule 12 has an elongated shape along the longitudinal direction of the cooling coil 11. This allows
It is possible to prevent the latent heat storage material S from non-uniformly solidifying in the capsule 12, thus preventing expansion of the non-uniformly solidified latent heat storage material to reduce the strength of the capsule 12 and reduce the thickness of the capsule 12. This can prevent a decrease in heat transfer efficiency from the cooling coil 11 to the latent heat storage material S.

In FIG. 2 with the capsule 12 opened, the latent heat storage material S is formed on the inner surface 22A of one case 22.
A first enclosing port 22C for pouring in is projected, and the first enclosing port 22C is sealed by inserting a cap (not shown). On the inner surface 23A of the other case 23, a first recess 23D that closes the first sealing port 22C is formed. Also,
On the inner surface 23A of the other case 23, a second sealing port 23C into which the latent heat storage material S is poured is projected, and the second sealing port 23C is sealed by inserting a cap (not shown). On the inner surface 22A of the one case 22, the second sealing port 2
A second recess 22D that closes 3C is formed.

The inner surface 22A of the one case 22 has a first
The spherical protrusion 22E and the first spherical recess 22F are formed, and the second spherical protrusion 23 is formed on the inner surface 23A of the other case 23.
E, the second spherical concave portion 23F is formed. The first spherical protrusion 22E engages with the second spherical recess 23F, and
By engaging the spherical protrusion 23E with the first spherical recess 22F, the cases 22 and 23 are held in a folded and closed state.

The outer surfaces 22G, 2 of the cases 22, 23 are
Four circular dish-shaped recesses 22H and 23H are formed in 3G, respectively. By the circular dish-shaped recesses 22H and 23H,
The volume expansion of the latent heat storage material S during the phase change from liquid to solid is absorbed. Thereby, as described above, the capsule 12
Together with preventing the expansion of the latent heat storage material S that has been nonuniformly solidified due to the elongated shape along the longitudinal direction of the cooling coil 11, the strength of the capsule 12 is further reduced, and the thickness of the capsule 12 is increased. Can be made thinner. This allows the latent heat storage material S to flow from the cooling coil 11
Heat transfer efficiency can be prevented from decreasing. The latent heat storage material S
A small amount of air can be enclosed in the capsule 12 in order to absorb the volume expansion.

Further, the outer surfaces 22G, 2 of the cases 22, 23 are
Belt grooves 22I and 23I are formed in the center of 3G. Next, the structure of the three-dimensional capsule laminate 13 and the assembling order thereof will be described with reference to FIGS. 9 to 22. As shown in FIGS. 21 and 22, the three-dimensional capsule laminate 13 is formed on the cooling coil 11. The cooling coil 11 is formed in a three-dimensional shape by laminating flat plate layers 24 each having a coil portion formed in a meandering shape. The cooling coil 11 is formed on the flat plate layer 24 of the cooling coil 11.
Capsule layers 25 and 31 composed of a plurality of capsules 12 are provided along the longitudinal direction of the capsule 12, and the three-dimensional capsule laminate 13 is formed by alternately stacking the capsule layers 25 and 31. The assembling order of the three-dimensional capsule laminated body 13 will be described with reference to FIGS. 9 to 20.

The assembling order of the capsule layer 25 is shown in FIGS. As shown in FIG. 9, first, the frame 26 is prepared. This frame body 26 is a rail horizontal frame 26 on the drawing.
A, 26A and vertical frames 26B, 26C, 26D, 2 on the drawing
6E is assembled. Vertical frame 26B, 26C
In between, a brine direction reversal portion 27 is formed at one end of the capsule layer 25.

As shown in FIG. 10, a flat plate-like layer 24 composed of a coil portion formed in a meandering shape is mounted on a frame 26 by a metal fitting 27A. As shown in FIG. 11 and FIG. 12, the capsule 1 is provided on the flat plate layer 24 including the coil portion.
By incorporating 2, the capsule layer 25 including the plurality of capsules 12 is formed in the flat plate layer 24 of the cooling coil 11 along the longitudinal direction of the cooling coil 11. The capsule layer 25 is formed in a plane by arranging the capsules 12 vertically and horizontally. The dotted line in FIG. 12 indicates the meandering flow path 38.

As shown in FIGS. 4 and 13 to 16, the capsules 1 are arranged in the same capsule layer 25.
The two are integrated with a fastener 28 and will be described below. As shown in FIGS. 13 and 14, the fastener 28 includes a metal belt 29 that fastens the belt grooves 22I and 23I of the capsule 12 that are vertically aligned, and a fastener 30 that fastens both ends of the belt 29. ing. The stopper 30 is a frame portion 30A.
And two pressing portions 30B integrated with the frame portion 30A.

The state in which the capsule 12 is bound with the belt 29 is shown in the lowermost stage of FIG. 13, and the joint portion of the fastener 28 is shown in FIGS. 15 and 16. That is, the vertically aligned capsules 12 are bound by the belts 29 from both sides thereof,
Both ends of 9 are passed through the inside of the frame portion 30A of the stopper 30, and the belt 29 is passed under the both side portions 30C of the frame portion 30A through the holding portion 30B. The arrows (a) and (b) in FIG. The capsule 12 is bound by the belt 29 by pulling the belt 29 in the direction.

In this way, the capsule 12 has the fastener 28.
Since they are integrated with each other, a plurality of capsules 12 can be integrated. The structure and assembling order of the capsule layer 31 adjacent to the lower side of the capsule layer 25 are shown in FIGS.
Shown in. As shown in FIG. 17, first, the frame 32 is prepared. The frame 32 is a rail horizontal frame 32A on the drawing,
32A and vertical frames 32B, 32C, 32D, 32E on the drawing
Is assembled. A brine direction reversal portion 33 is formed at one end of the capsule layer 31 between the vertical frames 32B and 32C.

As shown in FIG. 18, a flat plate layer 34 made of a coil portion formed in a meandering shape is mounted on the frame body 32 by a metal fitting 35. As shown in FIGS. 19 and 20, the capsule 12 is formed on the flat plate-shaped layer 34 including the coil portion.
By incorporating the above, the capsule layer 31 including the plurality of capsules 12 is formed in the flat plate layer 34 of the cooling coil 11 along the longitudinal direction of the cooling coil 11. The capsule layer 31 is formed in a plane by vertically and horizontally arranging the capsules 12. The dotted line in FIG. 20 indicates the meandering flow path 38.

The capsules 12 lined up in the same capsule layer 31 are integrated by the above-mentioned fastener 28. As shown in FIGS. 21 and 22, the capsule layer 2 described above is used.
The three-dimensional capsule laminate 13 is assembled by alternately stacking 5 and the capsule layer 31 and connecting the capsule layers 25 and 31 with the vip 36.

As shown in FIG. 22, a brine flow path 37 is formed between the capsule layers 25 and 31 that are vertically adjacent to each other, and the brine direction reversal portions 27 and 33 are connected to the brine flow path 37. ing. Therefore, the brine flow path 37 and the brine direction reversing units 27 and 33 are used in FIGS.
A meandering flow path 38 shown by a dotted line is formed at. FIG. 23 shows a capsule casing 39, and a plurality of support rails 39A are arranged at predetermined intervals on the front inside of the capsule casing 39 in the drawing. Inside the rear side, a plurality of support rails 39B are arranged at predetermined intervals so as to face the plurality of support rails 39A. As shown in FIG. 26, a plurality of support rails 39A, 39B are provided on the rail horizontal frame 26A,
32A is supported respectively. Therefore, the three-dimensional capsule laminate 13 is supported by the capsule casing 39 in a multi-pointed manner, and in the three-dimensional capsule laminate 13, the predetermined capsule layers 25 and 31 are independently supported by the capsule casing 39. Therefore, the upper capsule layer 2
No load is received from 5, 31.

As shown in FIG. 25, the capsule casing 39 supporting the three-dimensional capsule laminate 13 is housed in the heat storage tank 2. A starting end 1A and a terminating end 1B of a cooling coil 11 composed of a three-dimensional capsule laminate 13 are connected to both ends of a refrigerant circulation conduit 10 of a cooling / heating medium input means 1 composed of a refrigeration cycle system. As described above, since the shape of the capsule 12 is the three-dimensional capsule laminated body 13, the capacity of the capsule 12 accommodated in the heat storage tank 2 can be secured in a wide area, and the IPF can be increased.

Next, the operation of this embodiment will be described. In the cooling / heating medium input means 1 including the refrigeration cycle system, the refrigerant gas is compressed by the compressor 6 and changed into the high temperature / high pressure refrigerant gas. The high-temperature high-pressure refrigerant gas is guided to the condenser 7, cooled by air, and undergoes a phase change to a high-temperature refrigerant liquid. The refrigerant liquid is guided to the expansion valve 9 via the liquid receiver 8. In the expansion valve 9, the pressure of the refrigerant liquid sharply decreases, a part of the refrigerant liquid is vaporized, and becomes a low-temperature gas-liquid mixed refrigerant. In the evaporator 4, the refrigerant liquid in the cooling coil 11 is vaporized to remove heat from the capsule 12 and the capsule 12 is cooled. Further, the gas-liquid mixed refrigerant that has passed through the evaporator 4 is
It is guided to the accumulator 5, separated into gas and liquid, and only the refrigerant gas is returned to the compressor 6.

Then, in the heat storage tank 2, in the evaporator 4, the latent heat storage material S in the capsule 12 is cooled by vaporization of the refrigerant liquid in the cooling coil 11, and the phase of the latent heat storage material S is changed from liquid to solid to store heat. During heat storage, the path from the closed circuit 14 to the heat exchanger 18 is cut off by operating the three-way valve 17, and the bypass path 16 communicates with the closed circuit 14. By the operation of the brine pump 15, the brine is stored in the heat storage tank 2
And the closed circuit 14, and the brine in the heat storage tank 2 is agitated. That is, since the cold heat medium output means 3 is the closed circuit 14, it is possible to improve the heat storage efficiency and make the heat storage uniform.

At the time of heat radiation, the three-way valve 17 is switched,
The bypass 16 is disconnected from the closed circuit 14, and the closed circuit 14 and the heat exchanger 18 are connected. At that time, the cooling / heating medium output means 3
Since it is a closed circuit 14, the efficiency of heat radiation can be improved. By the operation of the brine pump 15, the brine circulates between the heat storage tank 2, the closed circuit 14, and the heat exchanger 18, and in the heat storage tank 2, the latent heat storage material S in the capsule 12 undergoes a phase change from solid to liquid. Is stripped of heat and cooled. The cooled brine is guided to the heat exchanger 18 via the closed circuit 14. In the heat exchanger 18, the closed circuit 1
The brine in 4 and the cooling water in the cooling water circulation circuit 19 are heat-exchanged, and the heat-exchanged cooling water is the cooling water circulation circuit 1
It is guided to the load 21 by 9 and the load 21 is cooled.

Further, in the heat storage tank 2, the brine is allowed to flow in a meandering shape by the brine flow path 37 and the brine direction reversing portions 27, 33, and when the heat is stored, the brine is circulated to stir the inside of the heat storage tank 2. As a result, uniform heat storage (solidifying the entire latent heat storage material uniformly) can be reliably performed, and heat storage efficiency can be improved and heat storage can be made uniform.
In addition, the efficiency of heat dissipation can be improved during heat dissipation.

According to the above-mentioned structure, the latent heat storage material in the capsule is not cooled by the conventional capsule type brine, but the latent heat storage material in the capsule 12 is cooled by the cooling coil 11. Never use brine as. Therefore, the thermal efficiency can be increased.
In addition, since the latent heat storage material S undergoes a phase change in the capsule 12, there is no need to directly make ice on the cooling coil unlike the conventional static ice making method, and the capsule method has the advantage of being easy to handle.

Further, the cooling coil 11 has one capsule.
2 is attached, the capacity of the capsule 12 is freely selected, and the IPF is selected according to the selected capacity of the capsule 12.
Can be determined. Therefore, it was not possible to control the ice making area on the cooling coil in the static ice making method, but the capacity of the capsule 12 is set as the area of the phase change of the latent heat storage material S, and the area of the phase change of the latent heat storage material S is set as the area of the latent heat storage material S. You can decide freely. Therefore, the equivalent of static icemaking bridging, global and local icemaking cannot occur,
The IPC is high and can be set freely.

Although copper is used as the material of the cooling coil 11 in this embodiment, the material is not limited to copper, and stainless steel or the like may be used. In addition, although polyethylene is used as the material of the capsule 12 in the present embodiment, the material is not limited to this, and, for example, a synthetic product of polypropylene, vinyl chloride and ethylene vinyl copolymer may be used. it can.

Furthermore, in this embodiment, a solution containing a hydrated salt of sodium sulfate is used as the latent heat storage material S, but the present invention is not limited to this and, for example, a solution containing calcium chloride. Or water can be used. Further, in the present embodiment, a heat pump type refrigeration cycle system is used as the cooling / heating medium input means, but the present invention is not limited to this, and for example, an absorption type refrigerator or a cooling circuit for circulating brine is used. Can also be used.

Further, in this embodiment, the heat storage tank 2 is filled with brine, but water may be put in place of the brine. Further, in the present embodiment, the cold heat stored in the cooling coil 11 in the heat storage tank 2 is transferred to the cooling water via the brine, and the load 21 is cooled by the cooling water. It is also possible to fill the tank 2 with cooling water and directly cool the load 21 with this cooling water.

In addition, in this embodiment, the capsule 1
Although 2 has a rectangular parallelepiped shape, it is not limited to such a shape, and may have a cylindrical shape, for example.

[0058]

As described above, according to the first aspect of the invention, the latent heat storage material in the capsule is not cooled by the conventional capsule type brine, but the latent heat storage material in the capsule is cooled by the cooling coil. Since it is cooled, brine is not used as a cooling / heating medium input means. Therefore, the thermal efficiency can be increased.

Further, since the latent heat storage material undergoes a phase change in the capsule, there is no need to directly make ice on the cooling coil unlike the conventional static ice making method, and the capsule method has the advantage of being easy to handle. . Further, since the capsule is mounted on the cooling coil, the capacity of the capsule can be freely selected, and the IPF can be determined by the selected capacity of the capsule. Therefore, in the static ice making method, it was not possible to control the ice making area on the cooling coil, but the capacity of the capsule was set as the phase change area of the latent heat storage material, and the phase change area of the latent heat storage material was freely determined. it can. Therefore, static ice-making bridging,
No equivalent to global and local ice making can occur and IP
C is high and can be set freely.

According to the second aspect of the invention, since the cooling coil is the evaporator of the refrigeration cycle system, the cooling efficiency in the heat storage tank can be increased. According to the third aspect of the present invention, the capsule is arranged around the cooling coil in close contact with the cooling coil, so that the heat transfer efficiency from the cooling coil to the capsule can be secured.

According to the fourth aspect of the present invention, since the capsule is composed of a pair of cases having opposing surfaces for sandwiching the cooling coil, the work for attaching the capsule to the cooling coil can be facilitated. According to the invention of claim 5, the pair of cases are integrally configured so as to be openable and closable, so that the work for attaching the capsule to the cooling coil can be facilitated.

According to the invention described in claim 6, since the capsule has an elongated shape along the longitudinal direction of the cooling coil, it prevents uneven solidification of the latent heat storage material in the capsule, and therefore, It is possible to prevent the expansion of the latent heat storage material that is solidified unevenly, reduce the thickness of the capsule, and increase the efficiency of heat transfer from the cooling coil to the capsule. According to the invention described in claim 7, since the shape of the capsule is a three-dimensional capsule laminated body, the capacity of the capsule accommodated in the heat storage tank can be secured in a wide region, and the IPF can be increased.

According to the invention described in claim 8, the brine is allowed to flow in a meandering manner by the brine flow passage and the brine direction reversing part, and at the time of heat storage, the brine is circulated to stir the inside of the heat storage tank. It is possible to perform uniform heat storage (solidify the entire latent heat storage material uniformly), improve heat storage efficiency, and make heat storage uniform. Also, when radiating heat,
The efficiency of heat dissipation can be improved.

According to the invention described in claim 9, since the capsules arranged in the same capsule layer are integrated by a fastener, a plurality of capsules can be integrated.
According to the tenth aspect of the present invention, since the cooling / heating medium output means is a closed circuit, the brine circulates during heat storage, and heat storage efficiency can be improved and heat storage can be made uniform. Also, when radiating heat,
The efficiency of heat dissipation can be improved.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a latent heat storage device according to an embodiment of the invention described in claims 1, 2, 3, 4, 5, 6, 7, 8, and 9.

FIG. 2 is a perspective view showing an open state of a capsule.

FIG. 3 is a perspective view of a capsule.

FIG. 4 is a perspective view showing an assembled state of a capsule and a cooling coil.

5 is a cross-sectional view taken along the line I-I of FIG.

6 is a sectional view taken along line II-II of FIG.

7 is a sectional view taken along line III-III in FIG.

8 is a cross-sectional view taken along the line IV-IV of FIG.

FIG. 9 is a perspective view showing a first step of the manufacturing process of the capsule layer.

FIG. 10 is a perspective view showing a second step of the manufacturing process of the capsule layer.

FIG. 11 is a perspective view showing a third step of the manufacturing process of the capsule layer.

FIG. 12 is a view as viewed in the direction of arrow A in FIG. 11;

FIG. 13 is an exploded view of the capsule fastener.

FIG. 14 is an enlarged view of a fastener of a fastener.

FIG. 15 is an exploded view of the connecting portion of the fastener showing the state in which the capsule is bound with the fastener according to the enlargement of the part C in FIG. 13;

16 is a sectional view taken along line VV of FIG.

17 is a perspective view showing a first step of the capsule layer adjacent to the capsule layer of FIG. 12. FIG.

FIG. 18 is a perspective view showing a second step of the capsule layer adjacent to the capsule layer of FIG. 12.

FIG. 19 is a perspective view showing a third step of the capsule layer adjacent to the capsule layer of FIG. 12.

20 is a view on arrow B in FIG.

FIG. 21 is a perspective view of a three-dimensional capsule laminate.

FIG. 22 is an explanatory diagram showing the flow of brine in a three-dimensional capsule laminate.

FIG. 23 is a perspective view of a support frame for a cooling coil.

FIG. 24 is a perspective view showing a state where a cooling coil is placed on a support frame.

FIG. 25 is a side sectional view showing a state in which a cooling coil is housed in the heat storage tank.

FIG. 26 is a cross-sectional view of FIG. 25 taken along line VI-VI.

FIG. 27 is a configuration diagram of a first conventional latent heat storage device.

FIG. 28 is a configuration diagram of a second conventional latent heat storage device.

FIG. 29 is a configuration diagram of a third conventional latent heat storage device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cold heat medium input means 2 Heat storage tank 3 Cold heat medium output means 4 Evaporator 11 Cooling coil 12 Capsule 13 Three-dimensional capsule laminated body 14 Closed circuit 22 Case 23 Case 24 Flat plate layer 25 Capsule layer 27 Brine direction reversing part 28 Fastener 31 Capsule Layer 33 Brine Direction Inversion Section 37 Brine Flow Path S Latent Heat Storage Material

Claims (10)

[Claims] 1. A cold heat medium input means for supplying cold heat, a heat storage tank containing brine or water, a cooling coil connected to the cold heat medium input means and provided in the heat storage tank, and around the cooling coil. A latent heat storage device, which is provided with a capsule enclosing a latent heat storage material and a cooling heat medium output means connected to the heat storage tank. 2. The latent heat storage device according to claim 1, wherein the cooling coil is an evaporator of a refrigeration cycle system. 3. The latent heat storage device according to claim 1, wherein the capsule is arranged around the cooling coil in close contact with the cooling coil. 4. The latent heat storage device according to claim 1, wherein the capsule is composed of a pair of cases having opposite surfaces sandwiching the cooling coil. 5. The latent heat storage device according to claim 1, wherein the pair of cases are integrally formed so as to be openable and closable. 6. The capsule has an elongated shape along the longitudinal direction of the cooling coil.
The latent heat storage device according to any one of 2, 3, 4, and 5. 7. A three-dimensional capsule laminate is housed in the heat storage tank, and the three-dimensional capsule laminate has one or more capsules attached to the cooling coil along the longitudinal direction of the cooling coil. The latent heat storage device according to any one of claims 1, 2, 3, 4, 5, and 6, which is configured by stacking capsule layers. 8. A brine flow path is formed between adjacent capsule layers, and a brine direction reversal portion that is continuous with the brine flow path is formed at one end of the capsule layer so as to separate the brine flow paths of the capsule layer. 4. The brine direction reversal part connected to the brine flow path is formed at the other end of the arranged capsule layer, and the inlet / outlet of the heat storage tank is connected to the cooling / heating medium output means. , 4, 5, 6, 7 latent heat storage device according to any one of. 9. A capsule according to claim 1, wherein the capsules arranged in the same capsule layer are integrated by a fastener. Latent heat storage device. 10. The cooling / heating medium output means is a closed circuit, 1, 2, 3, 4, 5, 6, 7, 8, 9.
The latent heat storage device according to any one of 1.