JPH1114220A - Mobile cold keeping unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform the freezing work of a cold storage agent efficiently in particular in a transit base of transportation by preventing a matter to be reserved from being frozen when the cold storage agent is frozen in order to store the cooling/heating energy in a mobile cold keeping unit and circulating the chill discharged from the cold storage agent efficiently at the time of cold keeping. SOLUTION: A cooling board 5 and a cold storage agent 6 are applied sequentially along the inner surface of a thermally insulated housing 1 having a door 4 for placing or taking out a matter to be reserved and a chill circulation passage 8 is formed by providing a barrier wall 7 at a constant interval from the cold storage agent 6. When the cold storage agent 6 is frozen, circulation of the chill through the chill circulation passage 8 is interrupted by means of a flapper or a heater in order to form a kind of thermal insulation air layer for preventing the matter to be reserved from being frozen. In the cold keeping stage, the chill circulation passage 8 is opened so that the chill can circulate all over the unit thus bringing about a uniform cold keeping state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile cold storage box, in which a cold storage product is not frozen when a refrigerating agent is frozen in order to store cold energy in the cold storage box.

[0002]

2. Description of the Related Art The general structure of a mobile cool box is such that a plate-shaped evaporator (hereinafter referred to as a cooling plate) which is a component of a refrigerator, a regenerator and a protection plate are provided on the inner side wall of an insulated box with casters. Are arranged so as to overlap with each other, and a refrigerator attached to the heat insulating box is operated to freeze the regenerator, accumulate cold energy, gradually release the energy, and keep the inside of the refrigerator cool.

[0003]

In the above-mentioned conventional mobile cool box, when a refrigerator is operated in a state where cool articles are stored in the cool box, the temperature of the cooling plate becomes about -10.degree. As shown in FIG. 5, the outer surface of the cold storage is 35 ° C., the cooling plate is −10 ° C., the cold storage agent frozen in contact with the temperature is −8 ° C., and the temperature in the refrigerator is −5 ° C. As a result, the insulated article freezes.

[0004] In this case, if the insulated article is bottled juice, the juice inside will expand and the bottle will burst,
In the case of fruits and vegetables, the water in the plant tissue freezes and expands, causing tissue destruction, extremely reducing quality and losing commercial value. In addition, in the above-described structure, there is a problem that the cool air discharged from the regenerator does not circulate throughout the inside of the refrigerator, and the temperature distribution in the refrigerator becomes uneven.

[0005] In view of the above problems, the present invention does not freeze the cold storage agent even if the cold storage agent is frozen in a state where the cold storage product is placed in the cold storage box, and is released from the cold storage agent in the cold storage stage. It is an object of the present invention to provide a mobile cold storage in which cold air is circulated throughout the refrigerator to uniformly cool the cold-retained articles.

[0006]

According to a first aspect of the present invention, a cooling plate and a cold storage agent are sequentially disposed along an inner surface of an insulated box having a door for taking in and out a cold storage article. Then, a partition is provided at a predetermined interval from the regenerator to form a cool air circulation passage, and a caster is attached to the bottom of the heat insulating box.

[0007] With the above configuration, since the cool air circulation path exists between the cool storage agent and the cool keeping article, the cool keeping article does not freeze.

[0008] The invention of claim 2 employs a structure in which means for interrupting the cool air circulation is provided in the cool air circulation passage. The invention of claim 3 employs a cool air circulation passage as the means for interrupting the cool air circulation. The flapper is configured to be openably and closably attached to the outlet of the container.
As means for shutting off the cool air circulation, a heater is provided at the lower end of the cool air circulation passage.

According to the inventions configured as described above, in the process of freezing the regenerator, the cool air circulation passage forms an adiabatic air layer, so that freezing of the refrigerating article can be reliably prevented. By forming the cool air circulation passage along the surface of the substrate, the cool air can be circulated smoothly in the cool keeping stage, and the cool keeping temperature distribution can be made uniform.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partially cut-away internal partial perspective view of a movable cold storage according to the present invention in an open state.

An accommodation space 2 for the refrigerator is provided above the heat insulating box 1 and the refrigerator is installed here. Insulated box 1
The caster 3 for movement is attached to the bottom of
A door 4 for taking in and out of cold storage articles is attached to the front surface, and a cooling plate 5 and a cold storage agent 6 are sequentially arranged on a ceiling surface and side surfaces of the cold storage box so as to be spaced apart from the surface of the cold storage agent 6 by a predetermined distance. A cool air circulation passage 8 is formed by providing a partition wall 7, and a flapper 9 (see FIG. 2) is provided at the lower end of the cool air circulation passage 8 so as to be openable and closable.

In the above-described embodiment, when the cold storage agent 6 is frozen and cold energy is stored, the flapper 9 of the cold air circulation passage 8 is closed so that the passage becomes a kind of air heat insulating layer 10. On the other hand, when releasing the cold energy from the frozen regenerator 6, the flapper 9 of the cool air circulation passage 8 is opened to allow cool air to circulate in the refrigerator.

In another embodiment (see FIG. 3), a heater 11 is provided at the lower end of the cool air circulation passage 8 to prevent the cool air circulation in the passage, prevent freezing of the cold-reserved articles, and sufficiently freeze the regenerator 6. After that, the power of the heater 11 is turned off to enable the cool air circulation.

In FIGS. 2 and 3, the shelf plate 12 is made of a heat insulator, but when the inside volume is small and the whole can be covered with a single cold storage agent, the shelf plate 12 is made of a squash. can do.

Next, the function of this embodiment will be described. When the refrigerating machine is operated to freeze the regenerator 6 in order to store cold energy in the cool box, first, the flapper 9 of the cool air circulation passage 8 is closed or the heater 11 is energized. This operation can be performed automatically if a circuit is configured to operate simultaneously with turning on the power of the refrigerator.

When the refrigerating agent 6 is sufficiently frozen, the power supply of the refrigerator is opened, and at the same time, the power of the flapper 9 or the heater 11 of the cooling air circulation passage 8 is opened to circulate the cool air through the cooling air circulation passage 8 and the refrigerating agent. Absorb cold energy stored in the refrigerator to keep the inside of the refrigerator cool.

[0017]

As described above, according to the present invention,
When the cold storage agent is frozen to accumulate cold energy, the cold air circulation path is shut off, as if that part forms an air insulation layer, so that the cold-reserved articles do not freeze and the cold storage At the stage of releasing cold energy accumulated in the agent and keeping cool, the existence of the cool air circulation passage rectifies the circulation of cool air and keeps the cool condition uniform regardless of the state of the cool items stored in the cool box be able to.

In particular, when the refrigerating agent is additionally frozen at the transport relay base, the refrigerating articles are not frozen, so that an excellent effect is exhibited.

[Brief description of the drawings]

FIG. 1 is a partially cut-away internal perspective view of a movable cold storage according to an embodiment of the present invention in an open state;

FIG. 2 is a cross-sectional view of the cold storage agent installation portion.

FIG. 3 is a cross-sectional view of a cold storage agent installation portion in another embodiment.

FIG. 4 is a temperature gradient diagram from the outside to the inside of the storage;

FIG. 5 is a temperature gradient diagram from the outside to the inside of a mobile cold storage according to the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heat insulation box 2 Refrigerator accommodating space 3 Caster 4 Door 5 Cooling plate 6 Cold storage agent 7 Partition wall 8 Cold air circulation passage 9 Flapper 10 Air insulation layer 11 Heater 12 Shelf board

Claims (4)

[Claims] 1. A cooling air circulation passage in which a cooling plate and a cold storage agent are sequentially stacked along the inner surface of an insulated box having a door for taking in and out a cold storage product, and a partition is provided at a predetermined interval from the cold storage agent. And a caster mounted on the bottom of the heat-insulating box. 2. The mobile cold storage according to claim 1, further comprising means for interrupting the cooling air circulation in the cooling air circulation passage. 3. The mobile refrigerator according to claim 2, wherein a flapper is openably and closably attached to an outlet of the cool air circulation passage as means for interrupting the cool air circulation. 4. The mobile cold storage according to claim 2, wherein a heater is provided at a lower end of the cool air circulation passage as means for interrupting the cool air circulation.