JPS63153380A - Cold accumulation type refrigerator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a regenerator refrigerator that keeps products that require refrigeration or freezing, such as fresh foods and pharmaceuticals, cold, and is used for long-distance deliveries or small-lot deliveries by loading them onto trucks, etc. Regarding.

As shown in Japanese Utility Model Application Publication No. 60-21681, a conventional cold storage type refrigerator freezes a cold storage agent in a refrigerator installed in a refrigerator, and when it is loaded onto a truck or the like, the latent heat of melting of the cold storage agent is absorbed. It is known that products are kept cold by using them. The cold storage tank of this type of refrigerator, that is, the cooler filled with a cold storage agent and equipped with a refrigerant pipe to freeze this cold storage agent, utilizes the latent heat of melting of the frozen cold storage agent as described above. In order to efficiently freeze the cold storage agent, the refrigerant pipe is located approximately at the center of the cold storage tank.

Problems to be Solved by the Invention Although there is no problem with the freezing time of the cold storage agent in conventional cold storage type refrigerators, it is difficult to cool the inside of the refrigerator quickly, that is, to quickly lower the temperature to a predetermined temperature. This is extremely difficult since the agent is cooled through the surface of the agent. Furthermore, before this type of refrigerator is loaded onto a truck, etc., it is naturally stored in a cold storage operation at the base, and in this state, it is often used to put the refrigerated cargo into the warehouse to cool it. There was an inconvenience that this could not be done adequately.

The present invention has been made in view of the above points, and has a simple configuration that satisfies the functions of a cold storage box that utilizes the latent heat of melting of the cold storage agent and a refrigerator that can cool the cold storage agent. The purpose is to provide a cold storage type refrigerator that does not cause problems in terms of time.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention bends the cooling pipe of the cooling cycle in a meandering manner, and arranges the straight pipe portions alternately at the upper and lower portions. This is a cold storage tank whose lower part is placed in the upper part of the heat insulating box, and is placed in close contact with the wall on the side facing the inside of the box.

Function: With the above-described configuration, the present invention freezes the cold storage agent in the cold storage tank that is in contact with the cooling pipe, and the wall surface of the cold storage tank facing the inside of the refrigerator constitutes a cooling surface to quickly and efficiently cool the inside of the refrigerator. The upper straight pipe part freezes the cold storage agent quickly, and satisfies the functions of both a cold storage and a cooling refrigerator.

Example An embodiment of the present invention will be described below with reference to the accompanying drawings.

In the figure, 1 is the cold storage type refrigerator body, outer box 2,
It consists of a box body 6 consisting of an inner box 3 and a heat insulating material 4, and a machine room 6 arranged on the side of the box body for six people. A heat insulating door 7 is pivotally attached to the front surface of the box body 6 so as to be freely openable and closable, and movable casters 8 are provided on the bottom wall. In addition, a box-shaped cold storage tank 9 is arranged at the upper part of the inside of the box body 6, spanning almost the entire surface.
A net shelf 1o is provided in the center, and a drainboard 11 is provided at the bottom.

The machine room 6 has a compressor 12. Condenser 13. A blower 14 is arranged to cool these. Compressor 12, condenser 1
3 constitutes a well-known cooling cycle together with a cooling pipe 16 which will be described later.

The cold storage tank 9 is made of metal such as stainless steel and is configured in the shape of a sealed box with an upper wall 911, a lower wall 9b, a side wall 90, etc., and is arranged with the top wall of the box body 5 leaving a space for an air convection passage. There is. Further, the inside of the tank 9 is filled with a cool storage agent 16 made of a mixture of carbohydrates and an inorganic electrolyte aqueous solution, and furthermore, cooling pipes 15 are installed at approximately equal intervals. That is,
The cooling pipe 16 is bent in a meandering manner as shown in FIGS. 3 and 4, and by twisting at the bent portion, the upper straight pipe portion 16a and the lower straight pipe portion 15b are alternately formed. It is composed of The straight pipe part 16a located at the lower part is fixed with a fixing fitting 17 so as to be in close contact with the wall surface on the side facing the inside of the refrigerator, that is, the lower wall 9b, and the straight pipe part 15b located at the upper part is fixed at the center of the tank 9 or close to it. It is arranged to be located higher up.

Reference numeral 18 denotes a heat-sensitive part of a thermostat (not shown) that performs ON-OFF control of the compressor 11, and the adjacent straight pipe portion 1
5b and is fixed at approximately the center thereof. Heat sensitive part 18
In this part, the temperature is about 10'C lower than the melting point of the cold storage agent 1e, that is, if the cold storage agent has a melting point of 15°C, the temperature is -115°C.
When detected, the thermostat is configured to stop the compressor 11.

In the above configuration, when the compressor 12 is operated, a cooling operation is started, and the cooling pipe 15 starts freezing the cold storage agent 16 filled in the cold storage tank 9, and the cooling inside the refrigerator via the lower wall 9b is started. Perform forced cooling. This cooling operation continues until the thermostat senses a predetermined temperature, that is, the temperature at which the cool storage agent 16 is completely frozen. Even if the cold storage agent 16 is disconnected from the power supply, the latent heat of fusion of the cold storage agent 16 can keep the inside of the refrigerator cold for a predetermined period of time, and, for example, it can be mounted on a delivery vehicle to deliver fresh foods. Furthermore, when the power is turned on, the lower wall 9b of the cold storage tank 9, which the cooling pipe 15 is in close contact with, is located on the inside of the refrigerator, so that the cold items stored in the refrigerator can be efficiently and quickly cooled by natural convection.

Furthermore, the cold storage agent 16 freezes from around the cooling pipe 16,
Although heat transfer becomes insufficient, the freezing time does not become longer because the upper straight pipe portion 15a is located near the center of the cold storage agent 16.Effects of the InventionAs is clear from the above explanation, according to the present invention, The extremely simple configuration has the advantage of quickly freezing the cold storage agent and efficiently cooling the inside of the refrigerator.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a cold storage refrigerator according to an embodiment of the present invention, FIG. 2 is a partial sectional view of a cold storage tank, FIG. 3 is a top view of cooling pipes in the cold storage tank, and FIG. Figure ■−v′
FIG. 6...Box (insulated box), 9...Cold storage tank, 9b...Lower wall (wall surface), 16...
Cooling pipe, 16... Cold storage agent. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
figure

Claims (2)

[Claims] (1) An insulating box body equipped with an opening/closing door, a box-shaped cold storage tank filled with a cold storage agent and placed in the upper part of the insulating box body, and a cooling pipe placed to freeze the cold storage agent in this cold storage tank. , consisting of a cooling pipe that is attached integrally with the heat insulating box and a refrigerator that constitutes a cooling cycle; the cooling pipe is bent in a meandering manner, and the straight pipe portions are alternately located at the upper and lower portions of the cooling pipe; A cold storage refrigerator in which the lower part of the tube is fixed to the wall of the cold storage tank on the side facing the inside of the insulated box. (2) The regenerator refrigerator according to claim 1, wherein the upper portion of the straight pipe portion is located approximately at the center of the regenerator tank.