JPH08247672A - Heat accumulating device - Google Patents

Abstract

PURPOSE: To uniformize fusion of a heat accumulation material and to improve the efficiency of a heat accumulator, in a heat accumulating device which utilizes a heat accumulation material and is used for refrigeration or cooling. CONSTITUTION: A heat accumulator 15 is filled with a heat accumulation material and comprises one surface being a heat-exchange surface 20 for freezing and a back surface being a heat-exchange surface 21 for fusion having an uneven surface along which fluid flows. Heat accumulation units each having a cooling device 17 wherein a damper part 22 is arranged on the fluid discharge side, the thickness of the damper part 22 is higher than that of the heat- exchange surface for fusion, and the protrusion part of the heat-exchange surface 21 for fusion of the heat-accumulator 15 making plane contact with the heat-exchange surface 20 for freezing in a state to make abutment thereagainst is provided are laminated together.

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. 5 and 6, the heat storage containers 2 and 3 and two corrugated plates 4 and 5 that partition the heat storage containers 2 and 3 are inserted between the flat tubes of the heat exchanger tube 1 having a U-shaped cross section. 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
It is discharged to the outside from the air discharge port 11 via 0. At this time, the air that has entered the housing 7 from the air intake port 9 in the direction of the arrow 12 is deprived of heat by the heat storage materials 2 and 3, and becomes cooled air. Is discharged in the direction of the arrow 13 shown in the figure, and 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 problems, it is an object of the present invention to make the heat accumulator in the heat accumulator in which the heat storage material is sealed uniform and 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. A heat accumulator consisting of an exchange surface, the discharge side of the fluid has a damper part in which a part of the heat accumulator extends and fluctuates due to freezing and melting, and the damper part has a freezing heat exchange surface side for melting. The thickness of the container of the heat accumulator was made thicker than that of the heat accumulator, and the heat accumulating unit provided with a cooling device that abuts the convex portion of the heat exchanging surface for melting of the heat accumulator and contacts the freezing heat exchanging surface in a plane.

In the damper portion of the heat accumulator, a metal film is attached to the freezing heat exchange surface to reduce the thickness of the freezing heat exchange surface of the container of the heat accumulator by the thickness of the metal film.

[0009]

In the heat storage device of the present invention, the thickness of the freezing heat exchange surface of the regenerator is larger than the thickness of the melting heat exchange surface on the back side of the freezing heat exchange surface, and the freezing heat exchange surface is used for melting in the damper part of the regenerator. Since the heat exchange surface is curved inward, when the heat storage material is frozen, the thin-walled heat exchange surface for melting has a larger expansion due to freezing than the thicker heat exchange surface for freezing. The damper portion on the fluid discharge side of the heat accumulator has no curvature, and the fluid passage resistance is low. At the time of melting, since the heat storage material is frozen at the beginning of melting, there is no curvature, and as the heat storage material melts, the curvature gradually returns, and when completely melted, the curvature returns to its original value and reaches its maximum. Since the resistance to fluid passage is greater in the portion, the air volume is smaller, and the amount of air increases in the portion that melts later, and the unevenness of melting is less and uniform melting is possible, resulting in good efficiency.

Further, since the freezing heat exchange area is provided with a metal film, and the melting heat exchange surface expands more due to freezing than the freezing heat exchange surface, the damper portion on the fluid discharge side of the heat accumulator is curved. The flow resistance of the fluid is low. At the time of melting, since the heat storage material is frozen at the beginning of melting, there is no curvature, the curvature gradually returns as the heat storage material melts, and the curve returns to the base at full melting and reaches the maximum. Since the resistance to fluid passage is greater in the portion, the air volume is smaller, and the amount of air increases in the portion that melts later, and the unevenness of melting is less and uniform melting is possible, resulting in good efficiency.
In addition, the freezing heat exchange area has a metal film to improve freezing efficiency, and the freezing heat exchange surface of the regenerator is thin due to the metal film, so there is a difference in wall thickness from the melting heat exchange surface. Easy to mold.

[0011]

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 vertical sectional view of a heat storage device according to an embodiment of the present invention when freezing is completed, and FIG. 2 is a vertical sectional view of the same embodiment when melting is completed.

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, 18
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 including the heat storage unit 16 and the heat storage unit 16 including the heat storage unit 16 are surrounded by a heat insulating box 19.

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.
The thickness of the freezing heat exchange surface 20 is thicker than that of the melting heat exchange surface 21, and the damper portion 22 on the fluid discharge side has the melting heat exchange surface inside when the heat storage material is completely melted. It is curved toward and disappears when it is completely frozen.

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

The heat insulating box 19 has a fluid suction port 23 and a fluid discharge port 24, and a blower fan 25 for fluid transportation is provided at the fluid discharge port 24.

The operation of the heat storage device configured as described above will be described below. At the time of freezing of the heat storage unit 15, that is, at the time of heat storage, the refrigerant is caused to flow through the heat exchanger refrigerant pipe 18, and heat is flatly exchanged from the cooling device 17 to the freezing heat exchange surface 20 of the heat storage unit 15 to be frozen. At this time, the freezing heat exchange surface 20
Since the thickness of the melting heat exchange surface 21 is thicker than that of the melting heat exchange surface 21, the thin thickness heat-exchange surface 21 for melting has large expansion and the thick thick heat exchange surface 20 for freezing has small expansion. As a difference occurs, the curvature of the damper portion 22 becomes smaller as the freezing progresses, and at the time of complete freezing, as shown in FIG.
The bending of the damper part 22 on the fluid discharge side is eliminated.

When the heat accumulator 15 is melted, the blower fan 25 draws the fluid from the fluid suction port 23 into the heat storage device 14 as shown by the arrow 26 and discharges it from the fluid discharge port 24 as shown by the arrow 27. Since the initial stage of thawing is at the time of freezing, the damper portion 22 on the fluid discharge side of the heat accumulator 15 does not curve and the passage resistance of the fluid is small.

After that, since the expansion of the heat storage material during freezing becomes weaker as it melts, the damper part 22 is gradually curved as before, the fluid passage resistance is increased and the air volume is decreased. Bend back as shown. For this reason, the air volume can be reduced in the part that melts quickly, and the amount can be increased to the part that melts slowly. From this, the bias at the time of melting can be reduced and the efficiency is good.

As described above, the heat storage device 14 of the present embodiment is filled with a heat storage material, and the freezing heat exchange surface 20 having a flat surface on one side and the heat exchange surface for melting having the uneven surface through which the fluid flows. 21 has a damper part 22 on the discharge side of the fluid, which part of the heat accumulator 15 is extended and fluctuates due to freezing and thawing, and the damper part 22 has a freezing heat exchange surface side for melting heat. A heat storage unit provided with a cooling device 17 in which the container wall thickness of the heat storage device is made thicker than that of the exchange surface side, and the convex portions of the melting heat exchange surface 21 of the heat storage device are butted against each other to make a flat contact with the freezing heat exchange surface 20. Since 16 is laminated, melting can be performed efficiently.

Next, a second embodiment of the heat storage device according to the present invention will be described with reference to the drawings. The same components as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

FIG. 3 is a longitudinal sectional view of the second embodiment of the present invention when frozen, and FIG. 4 is a longitudinal sectional view of the same embodiment when thawed.

In FIGS. 3 and 4, 14 is a heat storage device and 15
Is a regenerator, 16 is a regenerator unit, 17 is a cooling device, 18
Is a heat exchanger refrigerant pipe, and 19 is a heat insulating box. In this embodiment, in the heat storage unit 15 of the heat storage device 14 according to the first embodiment, the thickness of the damper portion 22 of the freezing heat exchange surface 20 is thin, and the metal film 28 is attached by that thickness.

The operation of the heat storage device configured as described above will be described below. During freezing, as shown in FIG. 3, the melting heat exchange surface 21 has a larger expansion due to freezing than the freezing heat exchange surface 20, so that the melting heat exchange surface of the damper portion 22 on the fluid discharge side of the heat accumulator 15 is frozen. The curve in which 21 is directed inward disappears and the fluid passage resistance is low.

At the time of melting, as shown in FIG. 4, since the heat storage material is frozen at the beginning of melting, the damper portion 22 is not curved,
The curvature gradually returns as the heat storage material melts, and returns to the maximum when completely melted, and becomes the maximum.Therefore, the resistance to fluid passage is greater in the part that melts faster and the air volume is smaller. The amount of air flow is increased, and there is little uneven distribution of melting and uniform melting is possible, resulting in good efficiency. Further, since the freezing heat exchange area 20 is provided with the metal film 28, the freezing efficiency is improved, and since the freezing heat exchange surface 20 of the heat accumulator is thin due to the metal film, the freezing heat exchange surface 20 is The thickness difference is reduced and it is easy to mold.

As described above, the heat storage device 14 of this embodiment is
In the damper part 22 of the heat accumulator, a metal film 28 is attached to the freezing heat exchange surface 20 to reduce the thickness of the freezing heat exchange surface 20 of the container of the heat accumulator 15 by the thickness of the metal film 28. It is possible to reduce the bias of the heat storage unit 15 when melting, the melting is highly efficient, the freezing efficiency is good, and the heat storing unit is also easy to mold.

[0028]

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, are formed on the back surface. In the heat accumulator, the discharge side of the fluid has a damper part in which a part of the heat accumulator is extended and fluctuates due to freezing and thawing, and the damper part has a freezing heat exchange surface side rather than a melting heat exchange surface side. When the heat storage material is frozen, the thickness of the container is increased and a heat storage unit equipped with 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 is used. In comparison with the thicker heat exchange surface for freezing, the thin heat exchange surface for melting has a larger expansion due to freezing, so the heat exchange surface for melting of the damper part on the fluid discharge side of the heat accumulator faces inward. There is no bending and the fluid passage resistance is low. Since the heat storage material is frozen at the beginning of melting at the time of melting, there is no curvature of the damper portion, and the curvature gradually returns as the heat storage material melts, and the curvature returns to the base in complete melting and becomes maximum, Since the passage resistance of the fluid is higher in the portion that melts earlier, the air volume is smaller, and the amount of air increases in the portion that melts later, and there is less bias in melting and uniform melting is possible, resulting in good efficiency.

In the damper part of the heat accumulator, a metal film is attached to the freezing heat exchange surface to reduce the thickness of the freezing heat exchange surface of the container of the heat accumulator when the heat accumulator is melted. The deviation can be reduced, the melting is highly efficient, the efficiency at the time of freezing is good, and the heat accumulator is easy to mold.

[Brief description of drawings]

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

FIG. 2 is a longitudinal sectional view of the first embodiment of the heat storage device according to the present invention when the heat storage device is frozen.

FIG. 3 is a vertical sectional view of a second embodiment of the heat storage device according to the present invention when the heat storage device is frozen.

FIG. 4 is a longitudinal sectional view of the second embodiment of the heat storage device according to the present invention when the heat storage device is frozen.

FIG. 5 is a vertical sectional view of a conventional heat storage device.

FIG. 6 is a longitudinal sectional view of the heat storage device taken along the line AA ′ in FIG. 3 of the conventional example.

[Explanation of symbols]

 14 heat storage device 15 heat storage device 16 heat storage unit 17 cooling device 20 heat exchange surface for freezing 21 heat exchange surface for melting 22 damper part 26 metal film

Claims (2)

[Claims] 1. A heat accumulator which is filled with a heat storage material and has a heat exchange surface for freezing whose one side is a flat surface and a heat exchange surface for melting which has a concavo-convex surface on which a fluid flows, the discharge side of said fluid. Is a part of the heat accumulator that has a damper part that fluctuates due to freezing and thawing. In the damper part, the freezing heat exchange surface side makes the container wall thickness of the heat accumulator thicker than the melting heat exchange surface side. Storage device in which a heat storage unit including a cooling device that abuts the convex portion of the heat exchange surface for melting of the container and is in flat contact with the heat exchange surface for freezing is stacked. 2. The damper portion of the heat accumulator, wherein a metal film is attached to the freezing heat exchange surface to reduce the thickness of the freezing heat exchange surface of the container of the heat accumulator by the thickness of the metal film. Heat storage device.