JP2016008732A - Thermal storage unit and cooling and heating system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thermal storage unit that can maintain high-heat exchangeability without providing a complex device thereto.SOLUTION: The thermal storage unit includes: a case; a heat transfer part 42 arranged inside this case, through which a heat medium is communicated; multiple pieces of granular latent heat storage materials 43 stored inside the case and covering around the heat transfer part 42; and heat storing fluid filled between these latent heat storage materials 43 and the case. A dimension W0 between adjacent flat tubes 42B of the multiple flat tubes 42B constituting the heat transfer part 42 is smaller than a dimension W1 of the latent heat storage material 43.

Description

  The present invention relates to a heat storage unit and an air conditioning system including the same.

  Thermal storage units are used in buildings such as houses and other fields. In the heat storage unit, a latent heat storage material is stored inside the case, a pipe through which a heat medium such as antifreeze liquid is circulated is placed inside the case, and the latent heat storage material is solidified or melted around the pipe, And heat exchange between the heat storage material and the latent heat storage material. In the solidification process (cold storage process) of the latent heat storage material in such a heat storage unit, since the solidified latent heat storage material is fixed around the pipe, the fixed latent heat storage material becomes a thermal resistance and hinders the progress of the cold storage. . On the other hand, in the melting process of the latent heat storage material (cooling process), it starts to melt from the latent heat storage material fixed to the surface portion of the tube, so that the solidified latent heat storage material remains at the portion away from the tube, and the thermal refrigerant in the tube However, it does not cool sufficiently, which hinders the progress of cooling.

In view of this, for the purpose of improving heat exchange, conventionally, a heat transfer section in which a medium flows is arranged in a heat storage tank filled with a refrigerant body, and a bubble blowing hole is formed in the lower part of the heat storage tank. There is a heat storage unit that disposes the bubble blowing portion and causes a forced flow or disturbance in the refrigerant body near the outer periphery of the heat transfer portion by the bubbles blown out from the bubble blowing hole (Patent Document 1).
In the heat storage unit shown in Patent Document 1, one end of the bubble blowing portion is connected to a pressurized air supply device arranged outside the heat storage tank.

JP 2001-33069 A

  However, in the heat storage unit shown in Patent Document 1, the pressurized air supply device requires at least a pump that supplies pressurized air, a motor that drives the pump, a pump and a motor control device, and a filter that filters air. , The structure becomes complicated. That is, unless a pressurized air supply device having a complicated structure is provided, there is a problem that it is difficult to maintain high heat exchange in the heat storage unit.

  An object of the present invention is to provide a heat storage unit and an air conditioning system that can maintain high heat exchange properties without providing a complicated device.

  The heat storage unit of the present invention will be described with reference to the drawings. The case 41, the heat transfer units 42 and 420 that are arranged inside the case and through which the heat medium is circulated, and the case are housed. A plurality of latent heat storage materials 43 covering the periphery of the heat transfer section, and a heat storage liquid 44 filled between these latent heat storage materials and the case, and the heat transfer sections are arranged side by side. Tube portions 42B and 42P, and the dimension W0 between adjacent tube portions among these tube portions is smaller than the dimension W1 of the latent heat storage material.

In the present invention having this configuration, the heat storage unit 4 includes a plurality of latent heat storage materials covering the periphery of the heat transfer section, and a heat storage liquid filled between the latent heat storage material and the case. Since the latent heat storage material maintains its shape when solidified and melted, the heat storage liquid always naturally convects around the heat transfer section. As a result, an effect of promoting heat transfer such as convection heat transfer caused by natural convection of the heat storage liquid acts on the outer peripheral surface of the heat transfer section. Therefore, high heat exchange can be maintained in the heat storage unit without providing a complicated device for promoting heat transfer as in the prior art.
For example, the latent heat storage material may adhere to the heat transfer section during melting. When the latent heat storage material adheres to the heat transfer section, in particular, when the latent heat storage material enters between adjacent pipe sections among the plurality of pipe sections constituting the heat transfer section, the area in contact with the heat storage liquid of the heat transfer section As a result, the heat exchange performance decreases. On the other hand, in the present invention, the dimension between the adjacent pipe parts is smaller than the dimension of the granular latent heat storage material, so that the latent heat storage material does not enter between the adjacent pipe parts, and a high heat exchange rate. Can be maintained.

  The heat storage unit of the present invention includes a case, a heat transfer unit disposed inside the case and through which a heat medium flows, and a plurality of latent heats housed in the case and covering the periphery of the heat transfer unit A heat storage material, and a heat storage liquid filled between the latent heat storage material and the case, and the heat transfer unit has a plurality of tubes arranged side by side, and surrounds the heat transfer unit. Covering guard members 42C and 45 for preventing the latent heat storage material from adhering to the heat transfer section are arranged.

In the present invention having this configuration, as described above, the periphery of the heat transfer section is covered with a plurality of latent heat storage materials, and the heat storage liquid is filled between the latent heat storage materials and the case. Therefore, by maintaining the shape of the latent heat storage material, the heat storage liquid naturally convects around the heat transfer section, and high heat exchange performance can be maintained in the heat storage unit.
And since the guard member has covered the circumference | surroundings of the heat-transfer part, it is prevented that a latent heat storage material adheres to a heat-transfer part. Therefore, the area which contacts the heat storage liquid in the heat transfer section is secured, and high heat exchange properties can be maintained.

In the present invention, it is preferable that the guard member includes a net 45 that prevents the latent heat storage material from entering between adjacent tube portions of the plurality of tube portions.
In this configuration, the net can be deformed so as to follow the outer shape of the heat transfer section, and therefore can be easily disposed in the heat transfer section regardless of the shape and structure of the heat transfer section.

The heat transfer part is adjacent to the header pipe 42A located on the opposite side, the flat pipe 42B in which the end parts are communicated between the header pipes, and a plurality of the pipes are arranged side by side. Preferably, the corrugated fin 42C is interposed between the flat tubes, the tube portion is the flat tube, and the guard member is the corrugated fin.
In this configuration, the corrugated fin enhances the heat dissipation effect and also functions as a guard member, so that the number of parts can be reduced.

The air conditioning system of the present invention includes a heat storage unit having the above-described configuration, a heat source 2 connected to one end of a heat transfer unit of the heat storage unit, and a heat exchange connected to the other end of the heat transfer unit and arranged indoors. A panel (panel louver 3) is provided.
In the present invention having this configuration, since the heat storage unit can maintain high heat exchange and no complicated device is provided for promoting heat transfer, which increases the cost, the cost for maintaining the cooling and heating as a whole increases. Can be prevented.

The figure which shows the air conditioning system concerning 1st Embodiment of this invention. The perspective view which shows the thermal storage unit concerning 1st Embodiment of this invention. The schematic diagram which shows the inside of a thermal storage unit. The conceptual diagram explaining the rise and fall of a latent heat storage material. The schematic diagram which shows the principal part of a thermal storage unit. The schematic diagram which shows the example different from FIG. 5 of a thermal storage unit. The perspective view which shows the thermal storage unit concerning 2nd Embodiment of this invention. The schematic diagram which shows the inside of a thermal storage unit. The conceptual diagram explaining the rise and fall of a latent heat storage material. The schematic diagram which shows the inside of the other example of a thermal storage unit.

Embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
A first embodiment will be described with reference to FIGS.
FIG. 1 shows an air conditioning system 1 according to the present embodiment.
In FIG. 1, an air conditioning system 1 is disposed between a heat pump 21 and a heat exchange unit 22, a panel louver 3 as a heat exchange panel connected to the heat exchange unit 22, and the panel louver 3 and the heat exchange unit 22. The heat storage unit 4 is provided. The heat pump 21 and the heat exchange unit 22 constitute the heat source 2.
In the first embodiment, the panel louver 3 and the heat storage unit 4 are disposed in the heat insulation area A. The heat insulation area A includes not only the room in which the panel louver 3 is disposed but also the underfloor space in which the heat storage unit 4 is disposed. Insulation of the underfloor space is performed by heat-insulating the underfloor and the foundation.

The heat pump 21 includes a compressor, an expansion valve (both not shown), and the like. When the refrigerant such as alternative chlorofluorocarbon or CO ₂ gas is compressed by the compressor, and when the refrigerant is expanded by the expansion valve The water as a heat medium returning to the heat exchange unit 22 from the second connection pipe 72 described later through the heat exchange unit 22 is heated or cooled using the heat absorption phenomenon. The heat pump 21 heats the water returning to the heat exchange unit 22 when, for example, the outside air temperature is a predetermined temperature, and returns to the heat exchange unit 22 when the outside air temperature exceeds the predetermined temperature. Cool down.

The heat exchange unit 22 flows out the cooling water cooled by the action of the heat pump 21 toward the panel louver 3.
The panel louver 3 is used, for example, when the room louver 3 is disposed in the room of the house 10 to cool or heat the room. The panel louver 3 is made of, for example, aluminum, and both upper and lower ends thereof are closed. The tube louver 3 is attached to a plurality of tube members 31 that extend along the vertical direction and are arranged in parallel with each other at a predetermined interval. And an installation stand (not shown). In the present embodiment, a plurality of, for example, six tube members 31 are provided.

The upper parts of the plurality of pipe members 31 are joined and joined by an upper joining member 32A made of, for example, aluminum. A communication path (not shown) is formed at a joint portion between the upper portion of the pipe member 31 and the upper joint member 32A. A weir (not shown) that prevents water flowing in the pipe member 31 from flowing out of the predetermined flow path is provided at a predetermined position inside the upper bonding member 32A.
Moreover, the lower part of the some pipe member 31 is joined and connected by the lower joining member 32B formed, for example with aluminum. A communication path (not shown) is formed at a joint portion between the lower portion of the pipe member 31 and the lower joint member 32B. However, the joint part between the lower part of the pipe member 31 arranged at the leftmost side in FIG. 1 and the lower joint member 32B, and the joint part between the lower part of the pipe member 31 arranged at the rightmost side in FIG. There is no communication path formed in. A weir (not shown) is provided at a predetermined position inside the lower joint member 32B to prevent water flowing in the pipe member 31 from flowing out of the predetermined flow path.

Such a panel louver 3 is connected to the heat exchange unit 22 via a first pipe 51, a second pipe 52, and the like. Specifically, the lower part of the pipe member 31 arranged on the leftmost side in FIG. 1 and the heat exchange unit 22 are connected via the first pipe 51, and the first pipe 51 includes the heat exchange unit 22. An on-off valve 61 arranged on the front side, a switching valve 62 arranged outside the room, and a two-way valve 63 arranged indoors are provided.
Moreover, the 2nd piping 52 is connected to the lower part of the pipe member 31 arrange | positioned at the rightmost side in FIG. 1, and the 3-way valve 64 arrange | positioned outdoors is provided in the 2nd piping 52. As shown in FIG. In FIG. 1, the portion of the second pipe 52 that connects the three-way valve 64 and the switching valve 66 is not used when indoor air conditioning is performed.

  A first branch pipe 53 branches from a portion of the first pipe 51 where the switching valve 62 is provided, and a second branch pipe 54 branches from a portion of the second pipe 52 where the three-way valve 64 is provided. The first branch pipe 53 and the second branch pipe 54 are joined by a three-way valve 65. A first connection pipe 71 is connected to the three-way valve 65.

The heat storage unit 4 of 1st Embodiment is shown by FIG.2 and FIG.3.
The heat storage unit 4 is made of an acrylic cube-like case 41, a heat transfer part 42 disposed inside the case 41, a latent heat storage material 43 housed inside the case 41 and covering the periphery of the heat transfer part 42, And a heat storage liquid 44 filled between the case 41 and the latent heat storage material 43.
The case 41 has a size that can be installed, for example, under the floor of the house 10. In the present embodiment, the case 41 has a width of 500 mm, a depth of 500 mm, and a height of 300 mm.

The heat transfer section 42 includes an upper heat transfer section 421 disposed in an upper portion inside the case 41, a lower heat transfer section 422 disposed in a lower portion inside the case 41, and an upper heat transfer section 421. A connected heat transfer section 423 that connects the lower heat transfer section 422 is provided. In the first embodiment, the dimension between the top plate part of the case 41 and the upper heat transfer part 421 is set larger than the dimension between the bottom plate part of the case 41 and the lower heat transfer part 422.
In this embodiment, in order to prevent the latent heat storage material 43 from adhering to the heat transfer section 42, a net 45 as a guard member is disposed around the heat transfer section 42 (see FIG. 3).
The net | network 45 is a structure which covers the circumference | surroundings of the upper side heat-transfer part 421, the lower side heat-transfer part 422, and the connection heat-transfer part 423, respectively. In addition, the net | network 45 is good also as a structure which covers the upper side heat-transfer part 421 and the lower side heat-transfer part 422 separately, and exposes it without covering the connection heat-transfer part 423. The mesh 45 is made of metal, and the size of the stitches is smaller than the size of the latent heat storage material 43.

The upper heat transfer portion 421 is formed in a planar rectangular plate shape, and includes header pipes 42A located on opposite sides of each other, and a plurality of flat tubes 42B whose end portions communicate with each other between these header pipes 42A. And corrugated fins 42C interposed between adjacent flat tubes 42B.
One end of one header pipe 42 </ b> A of the pair of header pipes 42 </ b> A communicates with the first connection pipe 71. The other end side of the header pipe 42 </ b> A communicates with the connection heat transfer portion 423.

A flow path is formed inside the flat tube 42B. In FIG. 3, one flow path is formed in one flat tube 42B. However, a configuration in which a plurality of flow paths are formed in one flat tube 42B by providing a partition (not shown) inside is also possible.
Both end portions of the flat tube 42B are communicated with a pair of header pipes 42A disposed on opposite sides. In 1st Embodiment, it is set as the structure which provides the partition which is not illustrated in a pair of header pipe 42A, respectively so that the water which flows into the some flat tube 42B may meander. In addition, the water flowing in from one header pipe 42A may be branched into a plurality of flat tubes 42B and gathered in the other header pipe 42A. In this case, the first connection pipe 71 is communicated with one header pipe 42A, and the connection heat transfer section 423 is communicated with the other header pipe 42A.

The lower heat transfer section 422 has the same structure as the upper heat transfer section 421 except that one header pipe 42A communicates with the second connection pipe 72. That is, the lower heat transfer section 422 is a planar rectangular plate-like member having a header pipe 42A, a plurality of flat tubes 42B, and corrugated fins 42C.
The connection heat transfer part 423 communicates the header pipes 42 </ b> A arranged above and below the upper heat transfer part 421 and the lower heat transfer part 422, and is arranged extending vertically.

The melting point of the latent heat storage material 43 is set by adjusting the components of the latent heat storage material 43. The latent heat storage material 43 maintains its shape when solidified or melted.
The plurality of latent heat storage materials 43 are each formed from gelled paraffin. As this gelled paraffin, for example, CALGRIP (registered trademark) manufactured by JSR Corporation is used.
There are various shapes of the latent heat storage material 43, for example, a granular shape, a spherical shape, a cube shape, and the like. Examples of the particle size of the granular latent heat storage material 43 include 5 mm, 10 mm, and 20 mm. In the figure, a cube-like latent heat storage material 43 is shown.

In the present embodiment, the heat storage liquid 44 is water. The density of water is 1000 kg / m ³ .
When the density of the heat storage liquid 44 is a, the density of the latent heat storage material 43 when melted is b, and the density of the latent heat storage material 43 when solidified is c,
b <a <c
The relationship is satisfied.
Here, in selecting the latent heat storage material 43 having the above-described density, the supply temperature of water as a heat medium supplied from the heat source 2 is considered. For example, when the temperature range of water that can be supplied from the heat source 2 is around 7 ° C., the phase changes within the temperature range, and the phase change temperature is 9 as the CALGRIP (registered trademark) latent heat storage material 43 that can be obtained. ℃, specific gravity at melting is 0.94 (density at melting is 940 kg / m ³ ), specific gravity at solidification is 0.92 (density at solidification is 1100 kg / m ³ ), and latent heat is 190 kJ / kg There is something. Note that the latent heat storage material 43 may be separately manufactured so as to satisfy the above-described relationship.

In such a heat storage unit 4, as shown in FIG. 1, the upper heat transfer section 421 is connected to the first connection pipe 71, and the lower heat transfer section 422 is disposed on the front side of the heat exchange unit 22. The second connection pipe 72 connected to the switching valve 66 is connected. As a result, the heat exchange unit 22 and the heat pump 21 are connected to one end side of the heat transfer section 42, and the panel louver 3 is connected to the other end side of the heat transfer section 42.
As shown in FIG. 3, in the heat storage unit 4, the individual latent heat storage materials 43 maintain the shape, and the heat transfer section is formed inside the heat storage liquid 44 by the cooling water flowing in the heat transfer section 42. Since a temperature difference is generated between the periphery of the heat transfer unit 42 and a portion away from the heat transfer unit 42, the heat storage liquid 44 always naturally convects around the heat transfer unit 42.

And if a cooling water is poured in the heat-transfer part 42, the latent-heat storage material 43 will solidify and will be in the state of cold storage. At this time, the solidification heat released from the latent heat storage material 43 is transmitted to the heat storage liquid 44 and is transmitted to the cooling water in the heat transfer section 42 via the heat storage liquid 44.
In the present embodiment, when the latent heat storage material 43 is solidified, the density a of water as the heat storage liquid 44 is 1000 kg / m ³ , and the density c at the time of solidification of the latent heat storage material 43 is greater than the density a of water. Since it is 1100 kg / m ³ which is large, the latent heat storage material 43 is deposited in the lower layer inside the case 41 as shown in FIG. Thereby, cold air accumulates in the lower layer of the heat storage unit 4, and temperature stratification is carried out.

As shown in FIG. 5, in the first embodiment, a corrugated fin 42 </ b> C may be used as a guard member in addition to or instead of the net 45. The corrugated fin 42C as a guard member is provided between the adjacent flat tubes 42B.
The upper end portion of the corrugated fin 42C matches the upper side portion of the adjacent flat tube 42B, and the lower end portion of the corrugated fin 42C matches the lower side portion of the adjacent flat tube 42B.
That is, the corrugated fin 42C closes the space formed by the surfaces of the adjacent flat tubes 42B facing each other.

As shown in FIG. 6, in the first embodiment, in order to prevent the latent heat storage material 43 from entering between the adjacent flat tubes 42 </ b> B, the dimension W <b> 0 between the adjacent flat tubes 42 </ b> B is set to the value of the latent heat storage material 43. It may be smaller than the dimension W1. For example, when the dimension W1 of the short side of the cube-shaped latent heat storage material 43 and the dimension W1 of the particle size of the granular latent heat storage material 43 are 20 mm, the dimension W0 between the adjacent flat tubes 42B is 20 mm. Is less than.
In the example of FIG. 6, the corrugated fins 42C are omitted from between the adjacent flat tubes 42B, but in this embodiment, the corrugated fins 42C may be arranged.

  When the latent heat storage material 43 is melted, the latent heat storage material 43 tends to adhere to the heat transfer portion 42. In the first embodiment, when the mesh 45 is disposed in the heat transfer portion 42, the mesh The latent heat storage material 43 is separated from the heat transfer section 42 by 45. Even without the net 45, the latent heat storage material 43 does not enter between the adjacent flat tubes 42B in a state where the corrugated fins 42C are provided between the adjacent flat tubes 42B. If the dimension W0 between the adjacent flat tubes 42B is smaller than the dimension W1 of the latent heat storage material 43, the latent heat storage material 43 will not enter between the adjacent flat tubes 42B regardless of the presence or absence of the corrugated fins 42C. .

Next, returning to FIG. 1, indoor cooling using the panel louver 3 will be described.
When the panel louver 3 is used for cooling, a material in which the melting point of the latent heat storage material 43 is adjusted and set to 4 ° C. or more and 12 ° C. or less is used.
First, the latent heat storage material 43 is solidified, for example, at night when the temperature is low, so that the heat storage unit 4 is in a cold storage state in advance. Specifically, as indicated by a broken line arrow in FIG. 1, the cooling water cooled by the action of the heat pump 21 is caused to flow from the heat exchange unit 22 into the first pipe 51, and the first branch pipe is passed through the switching valve 62. Flow in 53. Then, the cooling water flows into the first connection pipe 71 via the three-way valve 65 and flows into the heat transfer section 42 of the heat storage unit 4. The latent heat storage material 43 is solidified by the cooling water flowing in the heat transfer section 42 and enters a cold storage state. At this time, the solidification heat released from the latent heat storage material 43 is transferred to the cooling water in the heat transfer section 42 via the heat storage liquid 44, and heat is added to the water in the heat transfer section 42. The water to which this heat has been applied returns to the heat exchange unit 22 through the second connection pipe 72. In the present embodiment, the cooling water flowing in the heat transfer section 42 is about 5 to 10 ° C.

Next, the switching valve 62 is switched, for example, during the daytime so that the water in the first pipe 51 does not flow into the first branch pipe 53. And as shown by the solid line arrow of FIG. 1, the cooling water cooled by the effect | action of the heat pump 21 is poured in the 1st piping 51 from the heat exchange unit 22 in the state by which the heat storage unit 4 was cold-stored previously.
The cooling water flows from the lower side into the pipe member 31 arranged on the leftmost side in FIG. 1 via the on-off valve 61, the switching valve 62, and the two-way valve 63. The cooling water meanders and flows in the adjacent pipe members 31 so as to be opposite to each other through the communication path. At this time, the cooling water flowing through the pipe member 31 absorbs heat, and the room is cooled.

Thereafter, the water heated by absorbing heat flows out from the lower portion of the pipe member 31 arranged on the rightmost side in FIG. 1 to the second pipe 52 and flows into the second branch pipe 54 via the three-way valve 64, It flows into the first connecting pipe 71 via the three-way valve 65. The warmed water flows in the heat transfer section 42 of the heat storage unit 4, and the heat released from the water flowing in the heat transfer section 42 is transferred to the latent heat storage material 43 via the heat storage liquid 44 and solidifies. The latent heat storage material 43 is melted. As a result, water whose heat has been released and whose temperature has decreased returns to the heat exchange unit 22 through the second connection pipe 72.
When the latent heat storage material 43 is melted, the density b when the latent heat storage material 43 is melted is 940 kg / m ^3, which is smaller than the water density a. Ascending in order (see the imaginary line in FIG. 4).
And the latent heat storage material 43 does not stick to the circumference | surroundings of the heat-transfer part 42 because the latent heat storage material 43 floats (refer FIG. 3).
And the water which returned to the heat exchange unit 22 is cooled again by the effect | action of the heat pump 21, and the cooling water cooled by the effect | action of the heat pump 21 is again sent to the panel louver 3 via the 1st piping 51 from the heat exchange unit 22. Supplied.
By such cooling water circulation, cooling using the panel louver 3 is performed.

Therefore, in the first embodiment, the following operational effects can be achieved.
(1) The heat storage unit 4 includes a plurality of granular latent heat storage materials 43 covering the periphery of the heat transfer section 42, and a heat storage liquid 44 filled between the latent heat storage materials 43 and the case 41. Since the granular latent heat storage material 43 maintains its shape when solidified and melted, the heat storage liquid 44 always naturally convects around the heat transfer section 42. Thus, an effect of promoting heat transfer such as convection heat transfer caused by natural convection of the heat storage liquid 44 acts on the outer peripheral surface of the heat transfer section 42. Therefore, it is possible to maintain high heat exchange in the heat storage unit 4 without providing a complicated device for promoting heat transfer as in the past.

(2) Among the plurality of flat tubes 42B constituting the upper heat transfer section 421 and the lower heat transfer section 422, the dimension W0 between the adjacent flat tubes 43B is smaller than the dimension W1 of the latent heat storage material 43, so The latent heat storage material 43 does not enter between the matching flat tubes 42B, and a high heat exchange rate can be maintained.
(3) Since the heat transfer section 42 is covered with the net 45 serving as a guard member that prevents the latent heat storage material 43 from adhering to the heat transfer section 42, the area of the heat transfer section 42 that contacts the heat storage liquid 44 is ensured. As a result, high heat exchange properties can be maintained.

(4) Since the net 45 can be deformed so as to conform to the outer shape of the heat transfer section 42, it is easily disposed in the heat transfer section 42 regardless of the shape and structure of the heat transfer section 42. Can do.
(5) Since the corrugated fin 42C enhances the heat dissipation effect and functions as a guard member, the number of parts can be reduced.
(6) Since the melting point of the latent heat storage material 43 is set by adjusting the components of the latent heat storage material 43, when the heat storage unit 4 including such a latent heat storage material 43 is cooled using the panel louver 3. It can also be used when heating.

(7) Since the relationship between the density a of the heat storage liquid a and the density c at the time of solidification of the latent heat storage material is a <c, the latent heat storage material 43 is precipitated in the lower layer of the case 41 during cold storage. Cold air accumulates in the lower layer and temperature stratification occurs. In addition, since the relationship between the density a of the heat storage liquid 44 and the density b when the latent heat storage material 43 is melted is b <a, the melting is performed among the plurality of latent heat storage materials 43 that have been precipitated during the cold storage. As a result, the latent heat storage material 43 does not come into close contact with the periphery of the heat transfer section 42. Therefore, heat transfer between the heat storage liquid 44 and water as a heat medium flowing through the heat transfer section 42 becomes efficient.

(8) The air conditioning system 1 includes the heat storage unit 4, the heat pump 21 and the heat exchange unit 22 connected to one end of the heat transfer unit 42 of the heat storage unit 4, and the panel louver 3 connected to the other end of the heat transfer unit 42. With. In such an air conditioning system 1, since the heat storage unit 4 can maintain high heat exchange and no complicated device is provided to promote heat transfer, which increases the cost, the overall cost of maintaining the air conditioning is low. It can be prevented from becoming high.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIGS.
In 2nd Embodiment, the structure of a heat-transfer part differs from 1st Embodiment, and another structure is the same as 1st Embodiment. In the description of the second embodiment, the same components as those of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
7 and 8 show a heat storage unit according to the second embodiment.
As shown in FIGS. 7 and 8, the heat storage unit 4 includes a case 41, a heat transfer unit 420 disposed inside the case 41, and latent heat that is housed inside the case 41 and covers the periphery of the heat transfer unit 420. A heat storage material 43 and a heat storage liquid 44 filled between the case 41 and the latent heat storage material 43 are provided.
The heat transfer section 420 of the second embodiment is bent and formed on the upper heat transfer section 421 </ b> A that is disposed in the upper portion inside the case 41, and is bent and formed on the lower portion in the case 41. The lower heat-transfer part 422A arrange | positioned and the connection heat-transfer part 423A which connects the upper heat-transfer part 421A and the lower heat-transfer part 422A are provided.

The upper heat transfer section 421A is formed in a plate shape by meandering one aluminum tube. One end of the upper heat transfer portion 421A is in communication with the first connection pipe 71, and the other end of the upper heat transfer portion 421A is in communication with the connection heat transfer portion 423A.
The lower heat transfer section 422A is formed in a plate shape by meandering one aluminum tube. One end of the lower heat transfer section 422A is in communication with the second connection pipe 72, and the other end of the lower heat transfer section 422A is in communication with the connection heat transfer section 423A.
The coupled heat transfer section 423A is a pipe extending up and down.

The latent heat storage material 43 and the heat storage liquid 44 are the same as the latent heat storage material 43 and the heat storage liquid 44 of the first embodiment. That is, the latent heat storage material 43 is formed from gelled paraffin. As this gelled paraffin, for example, CALGRIP (registered trademark) manufactured by JSR Corporation is used.
The heat storage liquid 44 is water. The density a of the heat storage liquid 44, the density b when the latent heat storage material 43 is melted, and the density c when the latent heat storage material 43 is solidified have a relationship of b <a <c.
Therefore, when the latent heat storage material 43 is solidified, the latent heat storage material 43 is deposited in the lower layer inside the case 41 as shown in FIG. 9. On the other hand, when the latent heat storage material 43 melts, it floats in order from the melted one of the plurality of precipitated latent heat storage materials 43 (see the imaginary line in FIG. 9).
And the latent heat storage material 43 floats, and the latent heat storage material 43 does not adhere to the circumference | surroundings of the heat-transfer part 42 (refer FIG. 8).

In FIGS. 8 and 9, a guard member such as a net is not provided in the heat transfer unit 420, but in the second embodiment, a guard member may be provided in the heat transfer unit 420 as illustrated in FIG. 10. . That is, in FIG. 10, the net | network 45 is arrange | positioned around the upper side heat-transfer part 421A and the lower side heat-transfer part 422A among the heat-transfer parts 420, respectively. The coupled heat transfer section 423A is exposed without being covered with the mesh 45, but as shown in FIG. 3, the entire heat transfer section 420 including the coupled heat transfer section 423A may be covered with the mesh 45. .
Moreover, in 2nd Embodiment, the dimension W0 between the adjacent pipe parts 42P among the adjacent pipe parts 42P may be made smaller than the dimension W1 of the latent heat storage material 43 as in the first embodiment.
Therefore, in 2nd Embodiment, there can exist an effect similar to 1st Embodiment.

Note that the present invention is not limited to the above-described embodiment, and includes the following modifications as long as the object of the present invention can be achieved.
In each of the above embodiments, the density a of the heat storage liquid 44, the density b when the latent heat storage material 43 is melted, and the density c when the latent heat storage material 43 is solidified have a relationship of b <a <c. The present invention is not limited to this configuration.

  And the heat storage unit 4 of this invention can be used also when heating. In this case, the latent heat storage material 43 having a melting point adjusted and set to 40 ° C. or more and 60 ° C. or less is used. First, for example, during the daytime when the temperature is high, the latent heat storage material 43 is melted so that the heat storage unit 4 is in a heat storage state in advance. Specifically, as indicated by the broken-line arrows in FIG. 1, hot water having a predetermined temperature heated by the action of the heat pump 21 is caused to flow from the heat exchange unit 22 into the first pipe 51, and then passed through the switching valve 62. Flow in one branch pipe 53. Then, the warm water is caused to flow into the first connection pipe 71 via the three-way valve 65 and flow into the heat transfer section 42 of the heat storage unit 4. The heat released from the hot water (40 to 60 ° C.) flowing through the heat transfer section 42 is transmitted to the latent heat storage material 43 via the heat storage liquid 44, and the latent heat storage material 43 is melted to be in a heat storage state. The water whose temperature has decreased due to the release of heat returns to the heat exchange unit 22 through the second connection pipe 72.

Next, for example, the switching valve 62 is switched at night when the temperature is lowered, so that the water in the first pipe 51 does not flow into the first branch pipe 53. Then, as indicated by the solid line arrows in FIG. 1, hot water having a predetermined temperature that is heated by the action of the heat pump 21 is caused to flow from the heat exchange unit 22 into the first pipe 51 in a state in which the heat storage unit 4 is preheated. The hot water flows from the lower side into the pipe member 31 arranged on the leftmost side in FIG. 1 via the on-off valve 61, the switching valve 62, and the two-way valve 63. The hot water meanders and flows in the adjacent pipe members 31 so as to be opposite to each other through the communication path. At this time, heat is radiated from the hot water flowing in the pipe member 31, and the room is heated.
Thereafter, the water whose temperature has been reduced due to the release of heat flows out from the lower part of the pipe member 31 arranged on the rightmost side in FIG. 1 to the second pipe 52 and passes through the three-way valve 64 in the second branch pipe 54. And flows into the first connection pipe 71 via the three-way valve 65. Then, the water whose temperature has decreased flows in the heat transfer section 42 of the heat storage unit 4, heat is released from the latent heat storage material 43 in the heat storage state, and the heat released from the latent heat storage material 43 is the heat storage liquid 44. The heat is transferred to the water in the heat transfer section 42 via the heat, and heat is added to the water in the heat transfer section 42. The water to which this heat has been applied returns to the heat exchange unit 22 through the second connection pipe 72. And the water which returned to the heat exchange unit 22 is heated again by the effect | action of the heat pump 21, and the warm water heated by the effect | action of the heat pump 21 is again supplied to the panel louver 3 from the heat exchange unit 22 via the 1st piping 51. Is done.
Heating using the panel louver 3 is performed by circulating such heated hot water.

In each of the above-described embodiments, the net 45 is used. However, a configuration in which a plurality of metal wires are wound inside the case 41 instead of the net 45 may be employed. In this case, the plurality of wires are arranged vertically with the upper and lower heat transfer portions 421 and 421A and the lower heat transfer portions 422 and 422A interposed therebetween, and the dimension between adjacent wires among these wires is latent heat. The size is smaller than the particle size of the heat storage material 43.
Furthermore, in each said embodiment, although water was used as a thermal medium, it is not limited to this, Other than water may be sufficient if it is a fluid which can move a heat | fever.

  INDUSTRIAL APPLICABILITY The present invention can be used as a heat storage unit and an air conditioning system including the same in buildings such as houses and other fields.

  DESCRIPTION OF SYMBOLS 1 ... Air-conditioning system, 2 ... Heat source, 3 ... Panel louver (heat exchange panel), 4 ... Heat storage unit, 41 ... Case, 42, 420 ... Heat transfer part, 42A ... Header pipe, 42B ... Flat tube (pipe part), 42C ... corrugated fin (guard member), 42P ... pipe part, 43 ... latent heat storage material, 44 ... liquid for heat storage, 45 ... net (guard member)

Claims (5)

A case, a heat transfer unit disposed inside the case and through which a heat medium flows, a plurality of latent heat storage materials housed in the case and covering the periphery of the heat transfer unit, and latent heat thereof A heat storage liquid filled between the heat storage material and the case,
The heat transfer part has a plurality of pipe parts arranged side by side, and the dimension between adjacent pipe parts among these pipe parts is made smaller than the dimension of the granular latent heat storage material. . A case, a heat transfer unit disposed inside the case and through which a heat medium flows, a plurality of latent heat storage materials housed in the case and covering the periphery of the heat transfer unit, and latent heat thereof A heat storage liquid filled between the heat storage material and the case,
The heat transfer part has a plurality of pipe parts arranged side by side,
A heat storage unit, characterized in that a guard member that covers the periphery of the heat transfer unit and prevents the latent heat storage material from adhering to the heat transfer unit is disposed. In the heat storage unit according to claim 2,
The heat storage unit, wherein the guard member includes a net that prevents the latent heat storage material from entering between adjacent tube portions of the plurality of tube portions. In the heat storage unit according to claim 2,
The heat transfer section includes header pipes located on opposite sides of each other, flat pipes having end portions communicating between the header pipes and arranged in a plurality, and adjacent flat pipes among the flat pipes. And corrugated fins interposed between
The heat storage unit, wherein the tube portion is the flat tube, and the guard member is the corrugated fin.   The heat storage unit according to any one of claims 1 to 4, a heat source connected to one end of a heat transfer unit of the heat storage unit, and connected to the other end of the heat transfer unit and arranged indoors. Heating and cooling system characterized by comprising a heat exchange panel.