JPH11132622A - Cold storage unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten a freezing time of a cold storing agent and increase an effect of keeping cold. SOLUTION: This cold storage unit is constructed such that an evaporating pipe 3 is pushed into the surface of a container 1, directly contacted with it, the surface of a pushing plate 5 having some fins contacted with the container 1 is corrugated, its protruded portion is oppositely arranged against each of straight pipes 3a of the evaporating pipe 3. With such an arrangement as above, a contact area of each of the container 1 and the evaporating pipe 3 and each of the container 1 and the pushing plate 5 having some fins is increased, a heat transferring amount per hour from the evaporating pipe 3 to the container 1 and also a heat transferring amount from the container 1 to the pushing plate 5 having some fins are increased to cause a cold storage in the container 1 to be increased and a cold dispersion from the fins 5a is activated. In addition, a clearance between each of the straight line pipes 3a of the evaporating pipe 3 and the pushing plate 5 having some fins is made locally narrow at a location of the protrusion, resulting in that a temperature difference is produced during cooling operation, an over-cooling state is prohibited from being generated and correspondingly a freezing time of the cold storing agent 2 is shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cool storage unit for cooling a cold storage or a vending machine in which a cold storage agent stored in a container is stored by cold heat stored therein. Also,
Similar to this cold storage unit, the same can be said for a heat storage unit that keeps a cool box or a vending machine warm by the accumulated heat of a heat storage agent heated in a container.

[0002]

2. Description of the Related Art A conventional cold storage unit will be described with reference to the following drawings. In this conventional example, a cold storage agent enclosed in a container is frozen via a refrigerator during a late-night power time in a vending machine for cold goods, for example, and the cold storage agent stored in the cold storage agent at other times is used. (Latent heat plus alpha) keeps the inside of the vending machine cool, that is to say, more precisely, assists in the original cooling and reduces the power consumption, especially during times of high power demand.

FIG. 3 is a perspective view of a cool box in which a conventional example is incorporated. In FIG. 3, a cool storage unit is attached to each of the inner surfaces of the heat insulation box 7 of the cool box opposite to each other. The cold storage unit has a configuration in which a container 1 in which a cold storage agent is sealed is sandwiched from both sides by a meandering evaporating tube 3 and a heat transfer plate 14 on the front side and a finned holding plate 15 on the other side. The evaporating tube 3 has parallel straight pipe portions 3a connecting the curved portions on both sides of the meander. The evaporating tube 3 is connected to a refrigerator (not shown), through which a refrigerant flows.

FIG. 4 is a plan view of a cool box in which a conventional example is incorporated. In FIG. 4, the supplementary description of FIG. 3 is slightly supplemented. The finned holding plate 15 is provided with a heat-dissipating band-shaped fin 15a on the surface on the side opposite to the container 1 in a direction perpendicular to the length direction (in FIG. Attachment screws 12 are attached to mounting seats 9 provided on the entire wall of the heat insulating box 7 via a helical compression spring 10. The container 1 is a bag-like member made of a film material that is easy to bend.
The regenerator 2 is sealed in the inside, and is attached to an attachment seat 8 provided on the wall of the heat insulation box 7 with an attachment screw 11. This container 1
Is held by the biasing force of the spring 10 between a flat portion on the opposite side of the fin 15a of the finned holding plate 15 from both sides and a flat portion on the surface of the heat transfer plate 14 (details will be described later).

FIG. 5 is a sectional view of a conventional example (a sectional view taken along line AA in FIG. 4). In FIG. 5, the description in FIGS. 3 and 4 is slightly supplemented. The heat transfer plate 14 has a bent edge. The heat transfer plate 14 is disposed so that the evaporating pipe 3 is brought into contact with the inner surface on the right side to be housed inside the edge, and the container 1 is brought into contact with the entire surface on the left surface. The container 1 is pressed and sandwiched between a flat portion of the finned holding plate 15 opposite to the fin 15 a and a flat portion of the surface of the heat transfer plate 14, and is attached to a wall of the heat insulating box 7. It is attached to the seat 8 with the attachment screw 11. That is, the mounting seat 8
Is provided with a not-signed slit, and the edge of the container 1 is sandwiched between the slits and fastened with mounting screws 11 to fix the container. Further, the container 1 is sandwiched between the heat transfer plate 14 and the finned holding plate 15 by the mounting seat 9, the spring 10, and the mounting screw 1.
2 That is, after the mounting screw 12 is passed through the helical spring 10 and the hole of the holding plate 15 with fins, the mounting seat 9 is compressed to a certain length while compressing the spring 10.
And secure it. The final compression force of the spring 10 at that time is the force between the finned holding plate 15 and the heat transfer plate 14 with respect to the container 1. Naturally, the expansion and contraction of the regenerator 2 sealed in the container 1 is absorbed by the contraction and extension of the spring 10.

[0006]

In the prior art, the regenerator 2
Is sandwiched between the heat transfer plate 14 and the flat plate 15 with fins in parallel, and cold heat is conducted through the contact plane. At this time, as a demand, it is desired to increase the amount of heat transfer (heat transfer amount) per hour, shorten the freezing time of the regenerator 2, and increase the heat dissipation from the fins 15a of the finned holding plate 15. On the other hand, in the conventional example, since the thickness of the container 1 is uniform, the generation of crystal nuclei is hindered and supercooling is likely to occur, and the freezing time of the regenerator 2 becomes too long due to the occurrence of the supercooling. Disadvantageously occurs. That is, usually, when the regenerator 2 is cooled and reaches the phase change temperature, the regenerator 2
Is frozen for a substantially constant time according to the amount of refrigeration, during which cold heat is accumulated. However, when the supercooling occurs, the time until the freezing is extended due to the supercooling time. By the way, in order to eliminate the supercooling (take out early), the regenerator 2
There is a method of mixing impurities such as flour and metal powder so that crystal nuclei are easily formed. However, in view of an increase in cost due to the mixing of impurities and a change in properties of the regenerator 2, this method is used here. I do not want to take it.

The problem to be solved by the present invention is to reduce the freezing time by removing the factor of the inhibition of freezing of the regenerator, and to increase the cooling heat dissipation from the holding plate which also serves as the cooling and heat dissipation, thereby increasing the cooling effect. It is to provide a cool storage unit.

[0008]

SUMMARY OF THE INVENTION The present invention is directed to a bag-like container made of a flexible film material and containing a refrigerating agent inside; a container sandwiching the container from both sides and placed in contact with each surface. An evaporating tube connected to the refrigerator and a holding plate for both cooling and heat dissipation; the evaporating tube is in direct contact with the container surface in a form of being pushed into the container surface, and the container-side surface of the holding plate is In this configuration, the surface of the container is deformed so that the surface of the container can be deformed so as to be in contact with the entire surface.

Here, the evaporating tube is formed so as to meander in the same plane, and straight pipe portions connecting the curved portions on both sides of the meandering are arranged in parallel. Either a mountain-shaped convex portion extending opposite to each straight pipe portion of the pipe is provided, or the evaporating pipe is formed so as to meander in the same plane, and a straight pipe portion connecting each curved portion on both sides of the meandering is parallel. Is disposed in the container-side uneven surface of the holding plate, is provided with a valley-shaped recess extending opposite to each straight pipe portion of the evaporation tube,
It is preferable that it is a structure.

The convex portion and the concave portion of the holding plate may have a shape in which all are opposed to the straight tube portion of the evaporating tube, or a portion thereof is opposed to the middle portion of the adjacent straight tube portion. Can take the form of Therefore, in the present invention, on the one hand, the evaporating tube is directly in contact with the container surface in the form of being pushed into the container surface, and on the other hand, the container side surface of the holding plate is formed into an uneven surface, and the container surface in which the regenerator is sealed follows this. Therefore, each contact area between the evaporating tube and the container and between the holding plate and the container increases. Therefore, the amount of heat transfer per hour from the evaporating tube to the container and the amount of heat transfer per hour from the container containing the regenerator to the holding plate increase, and the amount of accumulated cold heat per unit of the container increases, and the heat dissipated from the holding plate increases. Is activated.

Here, when the straight pipe portion of the evaporating tube meanders in parallel in the same plane, and the convex portion of the uneven surface of the holding plate is disposed so as to face each straight tube portion of the evaporating tube, The distance between each straight pipe portion and the holding plate varies (varies) so as to be locally narrow at the convex portion. as a result,
Since the regenerator in the container is cooled more rapidly at the opposite part (narrow part) of the straight part of the evaporator tube and the convex part of the holding plate than other parts, the temperature difference promotes the generation of crystal nuclei. Thus, the occurrence of supercooling is suppressed, and the freezing time of the regenerator is reduced.

Further, when the straight pipe portion of the evaporating tube meanders in parallel in the same plane, and the concave portion of the uneven surface of the holding plate is arranged so as to face each straight tube portion of the evaporating tube, Variation in the distance between the straight pipe and the uneven surface of the holding plate (variation)
However, although it is more equalized than when the convex portion of the holding plate faces each straight pipe portion of the evaporating tube, the place where each straight pipe portion of the evaporating tube and the concave portion of the holding plate face each other or are adjacent to each other Because the center of the straight pipe part and the convex part of the holding plate oppose each other, or locally narrow at an intermediate point between these parts,
The cooling is performed more quickly in the narrow portion, and the temperature difference promotes the generation of crystal nuclei, suppresses the occurrence of supercooling, and shortens the freezing time of the regenerator. In addition to this, unlike the case where the convex portion of the holding plate faces each straight tube portion of the evaporating tube, the following excellent operation also occurs. That is, in the above arrangement, the interval is extremely widened locally at the concave portion of the holding plate, so that freezing hardly occurs at this portion and the freezing time is prolonged. There is a drawback that the heat dissipation is hindered. However, in the arrangement in which the concave portion of the holding plate faces each straight pipe portion of the evaporating tube, the fluctuation of the interval is relatively small (the interval does not become extremely wide locally). Therefore, those disadvantages are remarkably improved.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Two embodiments of the present invention will be described with reference to the drawings. FIG.
FIG. 2 is a sectional view of the first embodiment. This sectional view corresponds to that of the conventional example in FIG. The first embodiment is different from the conventional example in that the evaporating tube 3 is directly in contact with the right side surface of the container 1 in the form of being pushed into the container.
The surface in contact with the container 1 is an uneven surface, and the convex portion of the uneven surface is arranged in a mountain-like shape so as to face each straight pipe portion 3a of the evaporation pipe 3. In addition, all the convex parts face the straight pipe portion 3a (as in the first embodiment), or a part thereof faces the straight pipe part 3a, and the rest is located at an equal position between the adjacent straight pipe parts 3a. Can be arranged.

Accordingly, the contact area between the evaporating tube 3 and the container 1 and between the finned holding plate 5 and the container 1 are increased. Therefore, the amount of heat transfer per unit time from the evaporating tube 3 to the container 1 and the amount of heat transfer per unit from the container 1 to the holding plate 5 with fins increase, and the amount of accumulated cold heat per unit time of the container 1 increases. Dissipation of cold heat from the air becomes active. In addition, the gap between each straight pipe portion 3a of the evaporating pipe 3 and the finned holding plate 5 varies (varies) so as to be locally narrow at the convex portion. As a result, the cold storage agent 2 in the container 1 is displaced by the straight pipe portion 3a of the evaporating pipe 3.
And at the place (the narrowest place) opposite the surface convex portion of the finned holding plate 5, cooling is quicker than other places.
The generation of crystal nuclei is promoted, the occurrence of supercooling is suppressed, and the freezing time of the regenerator 2 is reduced.

FIG. 2 is a sectional view of the second embodiment. This sectional view corresponds to that of the embodiment of FIG. The second embodiment is different from the first embodiment in that the concave portion of the uneven surface of the finned holding plate 6 which comes into contact with the container 1 is arranged in a valley-like manner so as to face each straight pipe portion 3a of the evaporation pipe 3. That is. In addition,
According to the first embodiment, the arrangement of the concave portions is such that all of the concave portions face the straight pipe portion 3a (as in the second embodiment), or a portion thereof faces the straight pipe portion 3a, and the remaining portions are adjacent to the straight pipe portion 3a. They can be arranged so as to be equally spaced between them.

Therefore, in addition to the same operation and effect as described above, the interval between each straight pipe portion 3a and the uneven surface of the finned holding plate 6 tends to be equalized, and the following operation and effect can be expected. . In the first embodiment, the holding plate 5 with fins
The disadvantage is that the interval becomes extremely wide locally at the concave part, so that freezing is difficult to occur at this point and the freezing time is extended, and conversely, it is difficult to melt at the time of heat release and the accumulated cold heat dissipation is hindered. On the other hand, in the arrangement in the second embodiment, since the fluctuation of the interval is relatively small (the interval does not become extremely wide locally), it is difficult to cause freezing at a wide interval (freezing time is reduced). Factor to extend)
In addition, the difficulty of melting during heat radiation (disturbance of accumulated cold heat dissipation) is remarkably reduced.

Further, what can be said in common with the first and second embodiments is that the container 1 containing the regenerator 2 is pressed from both sides by the concave and convex surfaces of the evaporating tube 3 and the holding plate 5 or 6 with fins. Therefore, attachment and holding are supported by the restraint (jagging) on the uneven surface. This is useful, for example, when mounted on a vehicle or the like and subject to severe vibration. By the way, it is possible to propose a heat storage unit having a configuration similar to the cold storage unit described in each of the first and second embodiments. A heat storage agent is used instead of the regenerator of the cool storage unit, a heater is used instead of the refrigerator, a heating tube is used instead of the evaporating tube, and a heat preservation room is used instead of the cold storage room. For example, in a vending machine, it is heated via a heater at midnight power hours, and at other times, heat energy stored in a heat storage agent is dissipated to keep the inside of the vending machine warm. ), And the power consumption can be reduced especially in a time zone where power demand is high.

[0018]

According to the present invention, the following excellent effects can be expected. (1) The evaporator tube comes into direct contact with the
The contact area between the evaporating tube and the container, and between the holding plate and the container is increased by contacting the entire surface of the holding plate surface with the concave and convex surface of the cooling and heat dissipating surface, so that the amount of heat transfer per time increases, The amount of cold stored per unit time of the cold storage agent in the container increases, and the heat dissipation from the holding plate is activated. As a result, the refrigerating time of the regenerator in the container is shortened, and the refrigerating effect is increased.

(2) In particular, when the evaporating pipe is formed in a meandering pipe and the convex portion of the uneven surface of the holding plate is arranged to face each straight pipe portion of the evaporating tube, the interval between each straight pipe portion and the holding plate is locally. To narrow. As a result, a temperature difference occurs because the regenerator is rapidly cooled locally, and therefore, the generation of crystal nuclei is promoted without mixing impurities into the regenerator, thereby suppressing the occurrence of supercooling and freezing time. Shortening can be achieved.

(3) When the evaporating pipe is formed in a meandering pipe, and the concave portion of the uneven surface of the holding plate is arranged to face each straight pipe portion of the evaporating tube, the interval between each straight pipe portion and the uneven surface of the holding plate is reduced. It tends to be equalized. Therefore, without mixing impurities into the regenerator, the occurrence of supercooling is suppressed, the freezing time of the regenerator is shortened, and when the convex portion of the holding plate faces each straight tube portion of the evaporating tube. In contrast, the difficulty of freezing at a wide interval (a factor that extends the freezing time) and the difficulty of melting at the time of heat radiation (inhibition of accumulated cold heat dissipation) are remarkably reduced. In other words, in the above arrangement, the interval becomes extremely wide at the concave portion of the holding plate, so that freezing hardly occurs at this portion and the freezing time is prolonged. However, in this arrangement, the intervals are equalized (the intervals are not extremely large locally).
Because.

(4) Since the container containing the regenerator is pressed from both sides by the concave and convex surfaces of the evaporating tube and the holding plate, attachment and holding are supported by the restraint (jagging) on the concave and convex surfaces. This is effective, for example, when the vehicle is mounted on a vehicle or the like and receives severe vibration.

[Brief description of the drawings]

FIG. 1 is a sectional view of a first embodiment according to the present invention.

FIG. 2 is a sectional view of a second embodiment according to the present invention;

FIG. 3 is a perspective view of a cool box in which a conventional example is incorporated.

FIG. 4 is a plan view of a cool box incorporating a conventional example.

5 is a sectional view of a conventional example (a sectional view taken along line AA in FIG. 4).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container 2 Cold storage agent 3 Evaporation pipe 3a Straight pipe part 4 Heat transfer plate 5, 6 Holding plate with fins 5a, 6a Fin 7 Heat insulation box 8, 9 Mounting seat 10 Spring 11, 12 Mounting screw

Claims (3)

[Claims] 1. A container in the form of a bag made of a bendable membrane material, in which a regenerator is sealed, and connected to a refrigerator disposed in contact with each surface with the container sandwiched from both sides. An evaporating tube and a holding plate for both cooling and heat dissipation, the evaporating tube being directly pressed into contact with the surface of the container, and the surface of the holding plate on the side of the container following the surface of the container following the entire surface. A cold storage unit characterized by having an uneven surface that can be deformed so as to come into contact with the cold storage unit. 2. The cold storage unit according to claim 1,
The evaporating tube is formed so as to meander in the same plane, and straight pipe portions connecting the curved portions on both sides of the meandering are arranged in parallel. A regenerative unit comprising a mountain-shaped convex portion extending opposite to the portion. 3. The cold storage unit according to claim 1,
The evaporating tube is formed so as to meander in the same plane, and straight pipe portions connecting the curved portions on both sides of the meandering are arranged in parallel. A regenerative storage unit comprising a valley-shaped recess extending opposite to the portion.