JPH0336876Y2 - - Google Patents

Description

[Detailed explanation of the idea] (b) Industrial application fields This proposal relates to a refrigerator equipped with a plate cooler.

(b) Prior art Utility Model Publication No. 58-29434 (IPC, F25D21/14)
The cooling box body has a dew receptacle formed on the back wall of the refrigerator that slopes low from both left and right ends toward the central drainage channel, and a horizontal lower edge located directly above the dew receptacle. A configuration is shown in which a rectangular plate-shaped cooler is provided inside the refrigerator.

According to such a configuration, the lower edge of the plate cooler is formed horizontally in order to obtain a large heat exchange area, but the plate cooler is placed directly above the dew pan. In this case, the gap between the two is wide near the center and narrow near both left and right ends. That is, during off-cycle defrosting, the gap in the center where a large amount of frost separated from the plate-shaped cooler is deposited is wide, and the gap where a small amount of frost is deposited is narrow. For this reason, during defrosting, the frost that peels off near the left and right edges of the plate cooler and accumulates on both the left and right ends of the dew receiving part does not completely separate from both lower edges of the plate cooler and comes into contact with it. The icicles cannot be completely thawed within the defrosting time, and after the cooling operation is restarted, they freeze into icicles, which gradually increase in volume as the cooling operation progresses, covering the plate cooler and the dew trap.
Not only does it cause the disadvantage that the inside of the refrigerator gets cold,
It became necessary to stop operating the refrigerator for a long time to melt the icicles.

(c) Purpose of the invention The purpose of this invention is to solve the drawbacks of the prior art.

(d) Structure of the invention A refrigerator is equipped with a dew pan that slopes low from both left and right ends toward a central drainage channel, and a rectangular plate-shaped cooler placed directly above the dew pan. At both left and right ends of the horizontal lower edge of the plate-shaped cooler,
By forming an inclined edge having an inclination angle equal to or greater than the inclination angle of the dew pan, the gap between the dew pan and the dew pan is increased, and the thin tube serving as the temperature detection part of the gas-filled defrosting return thermostat is formed. A refrigerator that is arranged so that it passes near and directly above both inclined edges and spans almost the entire width of the plate cooler to prevent residual frost from forming on the plate cooler during defrosting.

(E) Example of implementation of the invention An example of implementation of the invention will be explained below with reference to the drawings.
is an under-counter type refrigerator, which includes an insulating box 3 equipped with three insulating doors 2 that open and close the front opening, and a machine room 4 installed in parallel with this insulating box, in which a refrigerant compressor, condenser, etc. (not shown) are installed. It is composed of. Reference numeral 5 denotes an interior defined by the insulating box, and on the back wall 3A of the insulating box, there is a dew pan 6 that slopes downwardly from both left and right ends toward the center, and a drain extending downward from the center of the dew pan. road 7, left and right side walls 3B,
Together with the shelf supports 8A and 8B of 3C, shelf supports 8C and 8D that support the shelves 9A and 9B are formed. Reference numeral 10 denotes a rectangular plate-shaped cooler disposed directly above the dew pan. This cooler is molded by the so-called roll bonding method and has a meandering coolant flow path L, with its lower end extending from the center. The horizontal edge 10A and both left and right ends are inclined edges 10B and 10C having an inclination angle equal to or greater than the inclination angle of the dew pan. 11
1 is a gas-filled defrosting return thermostat that also serves as an internal temperature regulator, and the elongated thin tube 12 serving as the temperature detection section passes directly above the horizontal edge and both inclined edges, and connects to the plate cooler 10. A plate-shaped cooler 10 facing the back wall 3A of the insulation box 3 so as to span almost the entire width of the
It is located along the back side of the . This thin tube is fixed by holders 13A and 13B at two locations near the intersection of the horizontal edge 10A and the inclined edges 10B and 10C.

According to such a configuration, since the inclined edges 10B and 10C having an inclination angle equal to or greater than the inclination angle of the dew pan 6 are formed at both left and right ends of the lower edge of the plate-shaped cooler 10, off-cycle During defrosting, both inclined edges 10 are removed from near the left and right edges of the plate cooler 10.
The dew that has flowed down to B and 10C is guided to the horizontal edge 10A by the slope of both inclined edges and drips into the dew pan 6, and the frost that has peeled off from near the left and right edges of the plate cooler 10 is Both ends of the saucer 6 and both inclined edges 10
The plate cooler 10 is deposited in the gap between the slanted edges 10B and 10C.
be prevented from contacting. Therefore, the accumulated frost and the dew on the inclined edges 10B and 10C do not become connected due to the surface tension of the dew. In addition, a thin tube 12 serving as a temperature detection part of the gas-filled defrosting return thermostat 11 is disposed over almost the entire width of the plate-shaped cooler 10, passing directly above the inclined edges 10B and 10C. Therefore, the frost that has peeled off from the plate cooler 10 gets caught on the thin tube 12 while falling into the dew tray 6, and is deposited on the thin tube 12. Therefore, the frost accumulated on the thin tube 12 is Defrosting can be continued until it thaws, and in particular, defrosting can be accurately performed near the left and right edges of the plate cooler 10 where no refrigerant flow path L is formed and there is a lot of residual frost. In addition, if the thin tube 12 is arranged along the back surface of the plate-shaped cooler 10,
Even if the heat insulating door 2 is opened during defrosting and outside air enters the inside 5 of the refrigerator, the plate cooler 10 acts as a buffer, so that the defrosting return thermostat 11 does not malfunction.

(f) Effects of the invention Since the main proposal is structured as described above, it produces the effects listed below.

With both inclined edges, dew flowing down from near the left and right edges of the plate cooler can be effectively disposed of, and the frost accumulated on the dew pan can be prevented from coming into contact with the plate cooler. , this connection between frost and dew can also be prevented, and as a result,
Frost and dew treatment on the plate cooler becomes faster.

The thin tubes make it possible to detect the presence or absence of residual frost across the entire width of the plate-shaped cooler, and remove the frost that has peeled off from the plate-shaped cooler and caught on the thin tubes while falling into the dew pan until it thaws. Since frost can be continued, defrosting can be performed without any residual frost remaining on the plate cooler, and in combination with the above, accurate defrosting is now possible.

[Brief explanation of drawings]

The drawings all show embodiments of the proposed refrigerator, and the first
The figure is a front view of the insulation box, the second figure is an overall perspective view, and the third figure is a front view of the insulation box.
The figures are a sectional view taken along the line A-A' in FIG. 1, and FIG. 4 is an enlarged front view of the main parts. 5...Inside the refrigerator, 6...Dew pan, 7...Drainage channel, 1
0... Plate cooler, 10B, 10C... Inclined edge,
11... Defrost return thermostat, 12... Thin tube.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. The refrigerator is equipped with a dew pan that slopes low from both left and right ends toward a central drainage channel, and a rectangular plate-shaped cooler placed directly above the dew pan. In the refrigerator, inclined edges having an inclination angle equal to or greater than the inclination angle of the dew pan are formed on both left and right ends of the horizontal lower edge of the plate-shaped cooler, and the temperature of the gas-filled defrosting return thermostat is detected. A refrigerator in which a thin tube serving as a section is disposed over substantially the entire width of a plate-shaped cooler, passing directly above the both inclined edges. 2. The refrigerator according to claim 1, wherein the thin tubes are arranged along the back surface of a plate-shaped cooler.