JPH0618174Y2 - Cooling device for cooling container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a cool storage device for a cooling container used for transportation, storage, etc. of fresh food or the like that requires refrigeration.

(Prior Art) Conventionally, the one shown in FIG. 3 has been known as a regenerator for a cooling container of this type.

In the figure, reference numeral 1 denotes a pair of cold storage containers filled with the cold storage agent 2, which are buried in the heat insulating wall 3 a of the cold storage 3. Each cold storage container 1 is made of a hollow plate-like container, and a groove 1a bent in a meandering shape is formed on one side surface thereof so as to fit with approximately half of the outer peripheral surface of a refrigerant flow pipe 4 described later. The formation surfaces of the grooves 1a are attached to each other. A mixture of ammonium chloride and cellulose, for example, is used as the cold storage agent 2, and the freezing temperature is kept until the cold storage is completed by freezing and complete melting.

Reference numeral 4 denotes a refrigerant flow pipe sandwiched between the cold storage containers 1 so that a low temperature refrigerant in a cooling circuit (not shown) including a compressor, a condenser and the like can be circulated to cool the cold storage agent 2.

In addition, a sealing material 5 for performing high-adhesion bonding is filled between the bonding surfaces of the cold storage containers 1. The sealing material 5 is made of a heat-conductive synthetic resin or the like, and when the refrigerant flow pipe 4 is sandwiched between the cold storage containers 1, they are poured together in a liquid state in which the resin is mixed, and then cured by a chemical reaction of the resin. .

(Problems to be Solved by the Invention) By the way, the volume of the cold storage agent 2 expands and contracts due to freezing and thawing thereof, and the gap between the sticking surfaces of the cold storage containers 1 repeatedly changes each time. However, since the synthetic resin, which is the material of the sealing material 5, has poor elasticity, it cannot expand or contract according to the variation of the gap, which easily causes separation between the sealing material 5 and the cold storage container 1, resulting in , The air layer generated by the peeling becomes a thermal resistance, and the regenerator 2 and the refrigerant flow pipe 4
There was a problem that the heat exchange rate with Also,
Since the sealing material 5 has poor fluidity even in a liquid state, an air layer may be formed when it is poured, and the curing time is long, so that there is a problem that it takes time to manufacture.

The present invention has been made in view of the above problems, and an object thereof is to prevent peeling between the sticking surfaces of the cold storage containers even if the cold storage agent repeatedly expands and contracts.
Moreover, it is to provide a cool storage device for a cooling container that can be easily manufactured.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention sandwiches between a pair of cool storage containers each filled with a cool storage agent and stuck to each other, and a sticking surface of each cool storage container. In a regenerator for a cooling container equipped with a refrigerant flow pipe for circulating a low-temperature refrigerant of a cooling circuit, an electrothermal heat exchange plate that is in thermal contact with the refrigerant flow pipe is provided, and the heat exchange plate is also provided. Also, the refrigerant flow pipe is adhered to the attaching surface of each cold storage container via a hot melt adhesive having elasticity even after curing.

(Operation) According to the cooling storage device of the cooling container of the present invention, the hot melt adhesive expands and contracts due to its elasticity even if the gap between the sticking surfaces of the cooling storage containers changes due to expansion and contraction of the cooling storage agent. No peeling occurs between the adhesive and the cold storage container. Further, the thermally melted hot melt adhesive has good fluidity, so that an air layer is not generated when the hot melt adhesive is filled between the sticking surfaces of the cold storage containers.

(Embodiment) FIG. 1 and FIG. 2 show an embodiment of the present invention, in which the same components as those of the conventional example are designated by the same reference numerals. That is, 1 is a cold storage container, 2 is a cold storage agent, 3 is a cold storage, 3a is a heat insulating wall of the cold storage 3, and 4 is a refrigerant distribution pipe.

In the figure, reference numeral 10 denotes a heat exchange plate interposed between the adhering surfaces of the cold storage containers 1, which has substantially the same outer shape as the adhering surfaces and is cut out at a portion corresponding to the refrigerant flow pipe 4. It is made of a heat conductive metal plate, for example, a good heat conductive metal such as a copper plate. Further, the refrigerant flow pipe 4 is joined to the heat exchange plates 10 located on both sides thereof via the adhesive copper tape 11.

Reference numeral 12 denotes a hot melt adhesive, which is filled between the adhering surfaces of the cold storage containers 1. The hot-melt adhesive is a mixture of resins, wax, etc., which is melted by heat to be in a liquid state.

When cold storage is performed in the cooling container configured as described above, the low-temperature refrigerant flowing into the refrigerant distribution pipe 4 exchanges heat with the cold storage agent 2 via the heat exchange plate 10 while moving through the refrigerant distribution pipe 4. To be done.

As described above, according to the cool storage device of the cooling container of the present embodiment, the hot melt adhesive 1 which has elasticity even after curing.
Since the sticking surface of each cold storage container 1 is adhered in 2,
Even if the cold storage agent repeatedly expands and contracts and the gap between the adhering surfaces fluctuates, the hot melt adhesive 12 expands and contracts by its elasticity and does not peel off from the adhering surface. Furthermore, since the hot melt adhesive 12 is applied by being dissolved in a liquid having good fluidity, there is no possibility that an air layer is formed between the adhering surfaces of the cold storage containers 1 at the time of application and the curing time is short. It can be easily manufactured. Further, the hot-melt adhesive 12 has a larger thermal resistance than the heat-conducting resin used in the conventional example, but the heat that is in thermal contact with the refrigerant flow pipe 4 between the adhering surfaces of the cold storage containers 1 Since the exchange plate 10 is provided,
The poor heat conductivity of the hot melt adhesive 12 can be compensated.

Although the heat exchange plate 10 is provided in the refrigerant flow pipe 4 in the above-described embodiment, a so-called roll bond heat exchange plate in which a pair of heat exchange plates each having a refrigerant flow passage formed in at least one of them are attached to each other is used. May be. In addition, the present invention is different from the one in which the cold storage container 1 is embedded in the heat insulating wall 3a as in the above-described embodiment, for example, a retainer or the like is separately attached at a predetermined position in the cool box 3 and the cool storage container 1 is stored in the retainer. It can also be applied to the type that does.

(Effects of the Invention) As described above, according to the cool storage device of the cooling container of the present invention, even if the gap between the sticking surfaces of each cool storage container fluctuates due to repeated expansion and contraction of the cool storage agent, hot melt bonding is performed. Since the agent expands and contracts due to its own elasticity, it does not separate from the sticking surface. Furthermore, since the hot melt adhesive is applied by dissolving it in a liquid with good fluidity, there is no possibility of forming an air layer between the sticking surfaces of the cold storage containers during the application, and the curing time is short, so the production is It can be done easily. Further, the hot-melt adhesive has a higher thermal resistance than the heat-conducting resin used in the conventional example, but a heat exchange plate that is in thermal contact with the refrigerant flow pipe is provided between the sticking surfaces of the cold storage containers. Since it is provided, the poor heat conductivity of the hot melt adhesive can be compensated.

[Brief description of drawings]

1 and 2 show an embodiment of the present invention. FIG. 1 is a sectional view of a regenerator of a cooling container, an internal front view of the regenerator, and FIG. 3 is a cooling container of a conventional example. It is sectional drawing of a cool storage device. In the figure, 1 ... Regenerator, 2 ... Regenerator, 4 ... Refrigerant flow pipe, 10 ... Heat exchange plate, 12 ... Hot melt adhesive.

Claims (1)

[Scope of utility model registration request] 1. A pair of cold storage containers each filled with a cold storage agent and adhered to each other, and a refrigerant flow pipe that is sandwiched between the adhesive surfaces of the cold storage containers and circulates a low-temperature refrigerant in a cooling circuit. In a cool storage device for a cooling container including: a heat transfer plate that is in thermal contact with the refrigerant flow pipe and is in thermal contact with the refrigerant flow pipe; A cool storage device for a cooling container, characterized in that it is adhered to the sticking surface of each cool storage container via an agent.