JPS5825249Y2 - Reizoko - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a refrigerator that saves power by attaching a portion of a capillary tube to a cooler for a refrigerator compartment.

Conventionally, in a refrigerator that has a refrigerator compartment and a freezer compartment, and in which the refrigerant from the compressor is made to flow into the refrigerator compartment cooler via a capillary tube and then to the freezer compartment cooler, the compressor Its operation is controlled by a control switch that operates in response to the temperature within the refrigerator compartment.

According to such a configuration, in winter and the like when the outside temperature is relatively low, the operating rate of the compressor decreases, making it difficult to maintain the storage room at a predetermined low temperature.

Conventional refrigerators of this type are equipped with a heater that heats the refrigerator compartment, and the heater forcibly heats the refrigerator compartment to increase the operating rate of the compressor, but this method reduces power consumption. This has the disadvantage that the amount of energy increases and becomes uneconomical.

The present invention was developed in view of the above circumstances, and its purpose is to attach a part of the capillary tube provided between the compressor and the refrigerator compartment cooler to the refrigerator compartment cooler for heat transfer. Accordingly, it is an object of the present invention to provide a refrigerator that can save power by effectively contributing heat from a capillary tube to improving the operating efficiency of a compressor.

An embodiment of the present invention will be described below based on the drawings.

Reference numeral 1 denotes a refrigerator main body, the interior of which is partitioned into two upper and lower compartments by a heat insulating wall 2, with the upper chamber serving as a freezing compartment 3 and the lower compartment serving as a refrigerating compartment 4.

Reference numerals 5 and 6 are doors for opening and closing the freezer compartment 3 and the refrigerator compartment 4.

7 is a compressor disposed at the lower rear of the refrigerator main body 1;
The discharge port of this is connected to the inlet of a condenser 8 attached to the back side of the refrigerator main body 1.

Reference numeral 9 indicates one end of the first tube 9a and a second tube shorter than this.
A capillary tube is formed by interconnecting one end of the first tube 9b with a joint 10, and the inflow end, that is, the other end of the first tube 9a, is connected to the outlet of the condenser 8 via a dryer 11. Link.

Reference numeral 12 denotes a refrigerator compartment cooler disposed above the interior of the refrigerator compartment 4, which is configured by integrally connecting an evaporation pipe section 13 and an insertion pipe section 14 having a smaller diameter with a heat transfer wall 15. For example, it is formed integrally by extrusion molding of aluminum and then bent into a meandering shape.

And the insertion pipe part 14 of the refrigerator compartment cooler 12
A part of the capillary tube 9, that is, the second tube 9b, is inserted in advance to heat transfer, and the other end of the second tube 9b, which is the outflow end of the capillary tube 9, is connected to the evaporator. It is connected to the end of the pipe section 13 on the inflow side.

Reference numeral 16 denotes a freezer compartment cooler installed on the inner peripheral surface of the freezer compartment 3, and its inlet is connected to the outlet end of the evaporation pipe section 13 of the refrigerator compartment cooler 12.

17 is a suction pipe whose inlet end is connected to the outlet of the freezer compartment cooler 16, and its outlet end is connected to the inlet of the compressor 7.

Then, the intermediate portion between both ends of the suction pipe 17 is brought close to or in contact with the first tube 9a of the capillary tube 9.

By the way, although not shown in the drawings, a heat-sensitive section is provided in the operation box section of the refrigerator main body 1 within the refrigerator compartment 4, for example, in the refrigerator compartment cooler 1.
A control switch extending directly below 2 is provided.

The control switch operates to start the operation of the compressor 7 when the temperature inside the refrigerator compartment 4 exceeds the set temperature, and starts the operation of the compressor 7 when the temperature inside the refrigerator compartment 4 falls below the set temperature. It operates to stop.

Next, the operation of this embodiment configured as described above will be explained.

When the temperature in the refrigerator compartment 4 reaches or exceeds the set temperature of the control switch, the compressor 7 starts operating, compresses the vaporized refrigerant sucked through the suction pipe 17, and sends it to the condenser 8.

Then, the vaporized refrigerant sent to the condenser 8 radiates heat and liquefies, and eventually flows into the evaporation pipe section 13 of the refrigerator compartment cooler 12 via the dryer 11 and the capillary tube 9, where the liquefied refrigerant A part of it evaporates and cools the refrigerator compartment 4, and then flows into the freezer compartment cooler 16, where it completely evaporates and cools the freezer compartment 3, and the suction pipe 1
7 and is sucked into the compressor 7.

Then, when the temperature inside the refrigerator compartment 4 becomes lower than the set temperature of the control switch, the compressor 7 stops its operation.

By the way, the temperature of the vaporized refrigerant flowing in the suction pipe 17 is relatively low, and it exchanges heat with the relatively high temperature liquefied refrigerant flowing in the first tube 9a of the capillary tube 9.

Therefore, while flowing through the first tube 9a of the capillary tube 9, the liquefied refrigerant is cooled down to approximately 30°C, flows into the second tube 9b, and then flows into the evaporation pipe section 13 of the refrigerator compartment cooler 12. When it evaporates and flows into the freezer compartment cooler 16, the temperature drops to approximately -15°C.

During this refrigerant distribution process, the refrigerator compartment cooler 12 is heated by the relatively high temperature liquefied refrigerant flowing in the second tube 9b of the capillary tube 9, and therefore the cooling rate in the refrigerator compartment 4 becomes slower. As a result, the operating time of the compressor 7 per operation becomes longer, and as a result, the operating rate improves.

As a result of this improvement in operating efficiency, not only the refrigerator compartment 4 but also the freezer compartment 3 can be kept cooled to a predetermined low temperature even in winter when the outside temperature drops.

In the above, the pressure inside the first tube 9a of the capillary tube 9 is relatively high, but the pressure decreases in the second tube 9b to a relatively low pressure, so the first tube 9a has a relatively high pressure resistance. The second tube 9b is made of iron or copper pipes, but the second tube 9b can be made of an aluminum tube with low pressure resistance.

Therefore, if the cooler for the refrigerator compartment is made of aluminum, integral molding becomes possible, and a device with good thermal conductivity can be manufactured at low cost.

In addition, the temperature of the refrigerant flowing into the second tube 9b exchanges heat with the suction pipe 17 in the first tube 9a, and the liquid refrigerant whose temperature has decreased somewhat is sent, so the cooler for the refrigerator compartment is heated more than necessary. Stable cooling inside the refrigerator is possible without raising the temperature inside the refrigerator.

As explained above, the present invention allows the heat of the capillary tube to effectively contribute to improving the operating rate of the compressor and the capacity of the refrigeration cycle, making it possible to eliminate the need for a heater to heat the refrigerator. Moreover, it is possible to provide a refrigerator with good performance.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; Fig. 1 is an overall vertical sectional side view, Fig. 2 is a refrigeration cycle component, Fig. 3 is an enlarged perspective view of the main parts, and Fig. 4 is a diagram of the middle of Fig. 3. FIG. 3 is a cross-sectional view taken along line IVIV. In the drawing, 1 is the refrigerator body, 3 is the freezer compartment, 4 is the refrigerator compartment, and 7
is a compressor, 8 is a condenser, 9 is a capillary tube, 9
a, 9b are first and second tubes, 12 is a cooler for the refrigerator compartment, 13 is an evaporation pipe part, 14 is an insertion pipe part, 15 is a heat transfer wall, 16 is a cooler for the freezer compartment, 17 is a cooler for the freezer compartment. It is a suction pipe.

Claims (1)

[Scope of utility model registration request] A refrigeration cycle configured such that refrigerant flows sequentially through a refrigerator compartment, a freezing compartment, a compressor, a condenser, a capillary tube, a cooler for the refrigerator compartment, and a cooler for the freezer compartment, and operates in response to the temperature inside the refrigerator compartment. In a refrigerator equipped with a control switch for controlling the operation of the compressor, the upstream part of the capillary tube is connected to the compressor suction pipe in a heat conductive manner, and the downstream part is connected to the refrigerator compartment cooler in a heat conductive manner. A refrigerator characterized by being attached to the refrigerator.