JPH08247674A - Heat accumulating device - Google Patents

Abstract

PURPOSE: To improve the efficiency of fusion by reducing deviation of fusion of a heat accumulator. CONSTITUTION: A heat accumulator 15 is filled with a heat accumulating material and comprises a heat-exchange surface 20 for freezing being one surface and plane, and a heat-exchange surface 21 for fusion being a back surface and having an uneven surface along which fluid flows. The heat accumulator 15 has a bent part 24 wherein thickness is decreased at one end of the discharge side 23 of fluid and a protrusion part 22 of the uneven surface of the heat- exchange surface 21 for fusion on the discharge side 23 of fluid from the bent part 24 forms a bellows 25. Heat accumulation units 16 each having a cooling device 17 making abutment against the protrusion part 22 of the heat-exchange surface 21 for fusion of the heat accumulator 15 to make plane contact with the heat-exchange surface 20 for freezing to form a laminated structure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat storage device for refrigerating or cooling using a heat storage material that stores cold heat.

[0002]

2. Description of the Related Art In recent years, a heat storage device used for refrigeration or cooling has been considered as disclosed in Japanese Patent Application Laid-Open No. 1-219466.

An example of the conventional heat storage device described above will be described below with reference to the drawings. 4 and 5, between the flat tubes of the heat exchanger tube 1 having a U-shaped cross section, the heat storage containers 2 and 3 and the two corrugated plates 4 and 5 that partition the heat storage containers 2 and 3 are inserted. The corrugated plates 4 and 5 are fixed to the heat exchanger tube 1 by brazing or fixing means such as fixing metal fittings (not shown). A heat storage device 6 in which a plurality of heat storage containers 2 and 3 configured in this way are stacked is housed in a housing 7. An air intake 9 in which a filter 8 is attached to the housing 7.
The blower fan 10 is provided on the downstream side of the heat storage device 6, and the air discharge port 11 is further formed on the downstream side.

In this structure, the refrigerant is flown through the heat exchanger tube 1 to freeze the heat storage material, and the air taken into the housing 7 from the filter 8 becomes the air passages 12 formed at both ends around the heat storage device 6. Blower fan 1 through 13
After passing 0, the air is discharged from the air discharge port 11 to the outside. At this time, the air that has entered the housing 7 through the air intake port 9 is deprived of heat by the heat storage materials 2 and 3 and becomes cooled air that is discharged from the air discharge port 11 by the blower fan 10.
The discharged low temperature air is used.

[0005]

However, in the above structure, when the heat storage material is melted, the blower fan 10 is installed at the upper part and the air taken into the housing 7 is discharged through the air passages 12 and 13. As a result, there is a difference in ventilation resistance, and when the heat storage materials 2 and 3 are stacked, the melting may be biased depending on the position, resulting in poor efficiency.

In view of the above-mentioned problems, it is an object of the present invention to make the melting of each layer uniform when the heat accumulators containing the heat storage material in the heat accumulating device are laminated to efficiently perform the melting.

[0007]

In order to achieve this object, the present invention provides a melting heat having a heat exchange surface for freezing, one side of which is a flat surface and an uneven surface through which a fluid flows, on one side. There is a heat accumulator consisting of an exchange surface, this heat accumulator has a bent portion with thin wall thickness at one end on the fluid discharge side, and the uneven surface of the melting heat exchange surface on the fluid discharge side from the bent portion. The convex portion is a bellows, and the thermal storage unit provided with a cooling device that abuts the convex portion of the heat exchange surface for melting of the heat accumulator and is in flat contact with the heat exchange surface for freezing is laminated.

[0008]

In the heat storage device of the present invention, the convex portion of the heat exchange surface for melting of the heat accumulator has a bellows on the discharge side of the fluid. Therefore, when the heat storage material is frozen, the bellows of the convex portion are not expanded due to the expansion of the heat storage material. The bent portion on the fluid discharge side of the heat accumulator that is extended is used as a fulcrum to open the fluid discharge side. At this time, since the cross-sectional area in the passage direction of the fluid is large, the ventilation resistance is small, and since the bellows return as the melted, the cross-sectional area in the passage direction of the fluid is gradually decreased and the ventilation resistance becomes large. Therefore, in each layer when the heat accumulators are stacked, the air exchange resistance is higher for the heat accumulators that melt earlier at the time of melting, so the fluid to be heat-exchanged is less likely to flow, and the ventilation resistance is small for that amount. It flows to the delay section.

From the above, when the heat accumulators are laminated, the deviation of melting in each layer can be reduced, and the efficiency is good.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a heat storage device according to the present invention will be described below with reference to the drawings.

FIG. 1 is a longitudinal sectional view of a heat storage device according to one embodiment of the present invention, and FIG. 2 is a longitudinal sectional view of the same embodiment at the start of melting,
FIG. 3 is an enlarged vertical sectional view of a main part of the embodiment.

In FIGS. 1 and 2, 14 is a heat storage device, and 15 is a heat storage device.
Is a regenerator, 16 is a regenerator unit, 17 is a cooling device, 1
Reference numeral 8 is a heat exchanger refrigerant pipe, and 19 is a heat insulating box.

The heat storage device 14 includes a heat storage device 15 and a cooling device 1.
The heat storage unit 16 composed of 7 and 7 is stacked, and the heat storage unit 16 is composed of a heat insulating box 19 that surrounds the stacked heat storage units 16 with a heat insulating material.

The laminated heat storage unit 16 is composed of an upper heat storage unit 16a, a middle heat storage unit 16b, and a lower heat storage unit 16c from the top in three layers.

The heat accumulator 15 is filled with a latent heat type heat storage material inside, and has a freezing heat exchange surface 20 having a flat surface on one side and a melting heat exchange surface 2 which is an uneven surface on the back surface of the freezing heat exchange surface 20.
1 and the convex portions 22 of the heat storage device 15 are in a staggered arrangement. In particular, as shown in FIG. 3, the fluid discharge side 23 of the heat storage unit 15 has a bent portion 24 having a thin wall at one end, and the convex portion 22 on the fluid discharge side 23 from the bent portion 24 has a bellows 25.
Has become.

The regenerator unit 16 abuts the convex portion 22 of the heat exchange surface 21 for melting of the regenerator 15 and is in planar contact with the cooling device 17.

The heat insulating box 19 has a heat exchange fluid suction port 26 and a fluid discharge port 27, and a blast fan 28 for fluid transportation is provided at the fluid discharge port 27.

The operation of the heat storage device configured as described above will be described below. Normally, as shown in FIG. 1, the bellows 25 on the discharge side 23 of the convex portion 22 of the heat storage unit 15 is in a contracted state, and since the bent portion 24 has a small wall thickness, the weight of the heat storage material in the bellows 25 is small. Is bent at.

The heat storage unit 15 stores the refrigerant in the heat exchanger refrigerant pipe 18
And the heat is exchanged in a plane from the cooling device 17 to the freezing heat exchange surface 20 of the heat accumulator 15 to be frozen. After that, the blower fan 28 is operated to take in the fluid from the suction port 26, exchange heat with the fluid on the uneven surface of the heat exchange surface 21 for melting of the heat accumulator 15, and discharge from the discharge port 27. Use the air.

At the start of melting the heat storage unit 15, as shown in FIG. 2, the bellows 25 expands due to the freezing expansion of the heat storage material filled inside the heat storage unit 15. At this time, since the bent portion 24 has a small wall thickness, the bent portion 24 does not bend, and the fluid discharge side 23 is spread and opened with the bent portion 24 as a fulcrum, and the ventilation resistance is small.

While the heat accumulator 15 is melting, the shortest upper heat storage unit 16a along the fluid path from the suction port 26 to the discharge port 27 melts quickly because the ventilation resistance is small, and then the middle heat storage unit 16b and the lower heat storage unit 16b. As the distance from the unit 16c becomes lower, the distance of the fluid from the suction port 26 to the discharge port 27 becomes longer, so that the ventilation resistance becomes large and the melting is delayed. At this time, the bellows 25 of the upper heat storage unit 16a, which melts quickly, contracts, opens with the bent portion 24 as a fulcrum, and the ventilation resistance becomes large, so that the fluid does not flow easily. Since it becomes smaller and the ventilation resistance becomes smaller, the flow becomes easier. in this way,
It is possible to reduce the bias of melting of the heat storage unit 15 in each of the stacked layers and to obtain a highly efficient and stable discharge fluid. Then, when completely melted, the bellows 25 contracts to the maximum, and the bent portion 2
Return to the normal state where 4 is bent.

As described above, the heat storage device of the present embodiment is filled with the heat storage material and has a freezing heat exchange surface 2 having a flat surface on one side.
0 and the back surface have a heat storage unit 15 composed of a heat exchange surface 21 for melting having an uneven surface through which the fluid flows. The heat storage unit 15 has a bent portion 24 having a thin wall thickness at one end of a discharge side 23 of the fluid. The convex portion 22 of the concavo-convex surface of the melting heat exchange surface 21 on the discharge side 23 of the fluid from the bent portion 24 is a bellows 25, and the convex portion 22 of the melting heat exchange surface 21 of the heat accumulator 15 is butted against and frozen. Since the heat storage unit 16 including the cooling device 17 that comes into flat contact with the heat exchange surface 20 is laminated, efficient melting can be achieved.

[0023]

As described above, according to the present invention, a heat exchange surface for freezing, which is filled with a heat storage material and has a flat surface on one side, and a heat exchange surface for melting, which has an uneven surface through which a fluid flows The heat accumulator has a bent portion with a thin wall thickness at one end on the fluid discharge side, and the convex portion on the uneven surface of the melting heat exchange surface on the fluid discharge side from the bent portion is bellows. Therefore, by stacking a heat storage unit having a cooling device that abuts the convex portion of the heat exchange surface for melting of the heat accumulator and makes a flat contact with the heat exchange surface for freezing, when the heat storage material is frozen, Due to the expansion of the heat storage material, the bellows of the convex portion expands and the bent portion disappears, and the cross-sectional area with respect to the fluid passage direction is large, so the ventilation resistance is small and the bellows returns as it melts, so the bent portion bends and the Ventilation resistance is large because the cross-sectional area gradually decreases Kunar. Therefore, in each layer when the heat accumulators are laminated, the air exchange resistance is larger as the heat accumulator that melts earlier at the time of melting, so the fluid to be heat exchanged is hard to flow, and the ventilation resistance is small for that part. It flows to the delay section. From the above, when the heat accumulators are laminated, the bias of melting in each layer can be reduced, and the efficiency is good.

[Brief description of drawings]

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

FIG. 2 is a vertical cross-sectional view of the same embodiment at the start of melting the heat storage device.

FIG. 3 is an enlarged vertical sectional view of a main part of the embodiment.

FIG. 4 is a vertical sectional view of a conventional heat storage device.

5 is a longitudinal sectional view of the heat storage device taken along the line AA ′ in FIG. 4 of the conventional example.

[Explanation of symbols]

 14 heat storage device 15 heat storage device 16 heat storage unit 17 cooling device 20 freezing heat exchange surface 21 melting heat exchange surface 22 convex portion 23 discharge side 24 bent portion 25 bellows

Claims (1)

[Claims] 1. A regenerator having a heat exchange surface for freezing, the inside of which is filled with a heat storage material, and one side of which is a flat surface, and a back side of which is a heat exchange surface for melting having an uneven surface through which a fluid flows. Has a thinned bent portion at one end on the fluid discharge side, and the convex portion of the uneven surface of the heat exchange surface for melting on the fluid discharge side from the bent portion is a bellows, and the melting of the heat storage unit Accumulating unit having a cooling unit that has a cooling device that abuts the convex portions of the heat exchange surface for use and makes a flat contact with the heat exchange surface for freezing.