JPS6124858Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a refrigerator whose purpose is to reduce the heat load on the evaporator of the cooling system.

In conventional refrigerators, a suction pipe, which is an inlet and outlet pipe of the evaporator, is connected to the evaporator through heat exchange with a capillary tube. Therefore, during cooling operation, the temperature of the capillary tube is higher than the ambient temperature inside the refrigerator, and the temperature of the suction pipe that exchanges heat with the capillary tube is also higher than the ambient temperature. The internal piping section of the suction pipe had the disadvantage of placing an unnecessary heat load on the evaporator.

The present invention solves the above-mentioned drawbacks of the conventional cooling system by insulating the internal piping of the capillary tube and the internal piping of the suction pipe, which have a temperature higher than the cooling chamber ambient temperature, from the surroundings.

An embodiment of the present invention is shown below in Figures 1 to 4.
This will be explained based on the diagram.

In the figure, 1 is the main body of the refrigerator, and the insulation box 2
The interior of the refrigerator is divided into two upper and lower chambers by a partition wall 3, and doors 4 and 5 are provided at the front of each chamber. A cooling chamber 6 is formed inside the partition wall 3, an evaporator 7 of a cooling system is provided, and a blower 8 is used to forcibly circulate cold air between the two chambers.
Reference numeral 9 denotes an electric compressor of the cooling system, which is provided on the lower rear surface of the main body 1. 10 is a condenser of the cooling system, and a duct plate 11 formed on the back side of the main body 1
is attached to. The capillary tube 12 and the suction pipe 13 of the cooling system are buried in the heat insulating box 2 in contact with each other so as to exchange heat, and are divided into almost parallel sections inside the refrigerator to form an evaporator 7.
is attached to. Note that the suction pipe 13 is connected via an accumulator 14. 15 is a cylindrical first heat insulating material into which the capillary tube 12 is inserted. This first heat insulating material 15 is inserted before the capillary tube 12 is attached to the evaporator 7, and the cylindrical portion is formed to be slightly larger than the capillary tube 12. Moreover, this first heat insulating material 15
As shown in Figures a and b, it does not cover the entire length of the capillary tube 12 located inside the refrigerator, but only partially. 16 is two parallel grooves 17, 18
A pair of second heat insulating materials having a. Said groove 17
covers the capillary tube 12 inside the refrigerator excluding the first heat insulating material 15, and has a slightly larger diameter than the capillary tube 12. A recess 19 is formed on the evaporator 7 side of this groove 17 in which the end of the first heat insulating material 15 is accommodated. Further, the groove 18 has a slightly larger diameter into which the suction pipe 13 is inserted. 20 is the groove 17, 1 formed on the side opposite to the evaporator 7 of the second heat insulating material 16.
8, which is inserted into a recess 21 formed on the back surface of the main body 1 inside the refrigerator. The pair of second heat insulators 16 cover the capillary tube 12 and suction pipe 13 with grooves 17 and 18 facing each other, and are attached by pressing the first heat insulator 15 toward the evaporator 7 ( The state shown in Fig. 4c) is the state shown in Fig. Further, the length (l) of the second heat insulating material 16 is determined for the reasons described below.

That is, the first heat insulating material 15 and the second heat insulating material 1
As shown in FIG. 3, the relationship between the temperature change due to the distance between the capillary tube 12 and the suction pipe 13 and the ambient temperature during operation of the cooling system is based on the heat exchange between the capillary tube 12 and the suction pipe 13. From the end part a of the accumulator 14
When looking at the distance from the end point a to the connection point b of the suction pipe 13 and the distance to the connection point c between the capillary tube 12 and the evaporator 7 on the horizontal axis and the temperature on the vertical axis, the length from the end point a is The temperature of the suction pipe 13 is higher than the ambient temperature up to l (the length of the second heat insulating wall 16). Also,
The capillary tube 12 is also tall. Therefore, the capillary tube 12 and the suction pipe 13 heat the ambient temperature. Therefore, in the present invention, the capillary tube 12 is covered with the first insulating material 15 and the second insulating material 16, and the suction pipe 13 is covered with the second insulating material 16 by the length l.
This prevents the evaporator from becoming a heat load.

As in the above configuration, when the compressor 19 is in operation, the capillary tube 12 and the suction pipe 13 extending into the refrigerator are heated through the first heat insulation. Material 1
5. Since it is insulated by the second heat insulating material 16, there is no heat load on the evaporator 7.

Therefore, unnecessary heat load on the evaporator 7 is reduced, resulting in a power saving effect. Further, since the first heat insulating material 15 is made into a tubular shape and is pressed against the evaporator 7 side by the second heat insulating material 16, the interior extension portion of the capillary tube 13 can be reliably insulated. Further, the first heat insulating material 15 can be securely fixed.

As is clear from the above description, the refrigerator of the present invention connects a compressor, a condenser, a capillary tube, an evaporator, and a suction pipe in order to form a refrigeration cycle, and connects the capillary tube extending into the refrigerator body. 2. A tubular first heat insulating material is provided in the pillar tube, and a concave portion is formed on the inside of the refrigerator and a convex portion is formed on the outside of the refrigerator.
A split-type second insulation material is provided between the tubular insulation material and the internal wall of the refrigerator, and a capillary tube and a suction pipe are buried in the second insulation material, thereby allowing air to flow from the capillary tube and suction pipe to the atmosphere. Since this prevents heat radiation, the heat load on the evaporator can be reduced.

Therefore, electricity costs can be reduced by removing unnecessary heat load on the evaporator during cooling operation.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a refrigerator showing an embodiment of the present invention, Fig. 2 is a perspective view of the second heat insulating material of the same refrigerator, and Fig. 3 is a temperature change depending on the distance between the capillary tube and the suction pipe. FIG. 4 shows an assembly diagram showing how to attach the first and second heat insulating materials. 7... Evaporator, 9... Compressor, 10... Condenser, 12... Capillary tube, 13... Suction pipe, 15... First insulation material, 16...
Second insulation material.

Claims (1)

[Scope of utility model registration request] A refrigeration cycle is formed by sequentially connecting a compressor, a condenser, a capillary tube, an evaporator, and a suction pipe, and the evaporator is provided in the main body, and the evaporator side of the capillary tube located in the main body is A first heat insulating material is provided, and between the end of the first heat insulating material remote from the evaporator and the inner wall of the main body, a pair of first heat insulating material having two grooves covering the capillary tube and the suction pipe are provided. A second heat insulating material is provided, a recess for accommodating the first heat insulating material is formed on the end face of the groove for accommodating the capillary tube of the second heat insulating material, and the inner wall of the main body includes both grooves on the other end side. A refrigerator with a convex portion that is inserted into the refrigerator.