JPS6119413Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a refrigerator in which an ice-making unit cooler is provided in the ice-making unit of the freezer compartment.

A conventional Fan Cool type refrigerator is shown in FIGS. 1 to 4.

In FIG. 1, reference numeral 1 indicates a freezer compartment, and reference numeral 2 indicates a refrigerator. In Fig. 2, the refrigerant is compressed in the compressor 5 and liquefied in the condenser 6. The refrigerant is depressurized in the capillary reach tube 7, evaporates and vaporizes in the cooler 3, and is sucked into the compressor 5 again to complete the refrigeration cycle. do. In FIG. 1, air is sucked in the direction from a to b by the action of the fan 4 and is turned into cold air by the cooler 3. This cold air is blown into the freezer compartment 1 from the blow-off port A, passes through the suction port B, and is sucked in by the fan 4 again. On the other hand, cold air is blown into the refrigerator 2 from the air outlet C, and is sucked through the suction port D by the fan 4. The temperature of the cold air in the freezer compartment 1 is made to be lower than the temperature of the cold air in the refrigerator 2 by controlling a damper 8 for adjusting the flow rate of cold air by a method not shown.

FIG. 3 shows a Fancool type refrigerator in which a cooler 9 for the freezer compartment 1 is disposed after the cooler 3, and FIG. 4 shows a block diagram of the refrigerant system.
Similarly to the above, the refrigerant that has passed through the compressor 5 and condenser 6 is depressurized in the capillary tube 7 and partially evaporated in the cooler 3 at, for example, -15°C. Thereafter, the liquid refrigerant remaining without being evaporated and the vaporized refrigerant are further depressurized in the capillary reach tube 10 and enter the cooler 9 for the freezer compartment 1, where they evaporate to, for example, -25°C and cool the freezer compartment 1. .

Now, in the fan-cooled refrigerator shown in FIGS. 1 and 2, it takes time to make ice because the ice-making section is cooled by the circulation of cold air generated by heat exchange between the cooler 3 and the air, as described above. It is inconvenient. Therefore, as shown in FIGS. 3 and 4, the fan-cooled refrigerator in which the ice-making section is directly cooled by the cooler 9 is superior in that it can speed up the ice-making time.
However, this type has the drawback that the temperature of the cooler 9 in the freezer compartment 1 is lower than the temperature of the cold air in the freezer compartment 1, resulting in frost formation and freezing.
Furthermore, in order to defrost, the temperature of the cooler 9 must be raised, and if the temperature of the cooler 9 is raised, the ice making efficiency decreases, making it difficult to defrost effectively.

The object of the present invention is to eliminate the above-mentioned drawbacks and provide a two-compartment fan-cooled refrigerator that does not cause frosting or freezing in the ice-making section in the freezer compartment.

In order to achieve the above-mentioned objectives, the present invention includes two or more types of refrigerants with different evaporation temperatures in the refrigeration cycle, and the cooler for the ice making section is placed downstream in the refrigeration cycle than the main cooler. It features an attached refrigerator.

Hereinafter, embodiments of the present invention will be described based on the drawings.

In Figures 5 and 6, Figures 1 to 4
Components with the same reference numerals as those in the drawings indicate the same components and functions.
In FIG. 5, an ice-making cooler 12 is disposed near the ice-making section 11, and as shown in FIG. 6, the ice-making cooler 12 is connected downstream of the main cooler 3 without a capillary reach tube. There is.

The refrigeration cycle of this embodiment uses two or more types of refrigerants with different evaporation temperatures, for example, R-12 with a high evaporation temperature and R-22 with a low evaporation temperature at a weight ratio of 75:
A non-azeotropic mixture of refrigerants consisting of a mixture of 25 refrigerants is enclosed.

Now, in FIG. 6, the refrigerant whose pressure has been reduced in the capillary reach tube 7 enters the main cooler 3, and first the refrigerant R-22, which has a lower evaporation temperature, starts to evaporate at, for example, -25°C. As the evaporation of R-22 progresses, the evaporation temperature increases, and at the outlet of the main cooler 3, R-22
becomes a vaporized refrigerant, while R-12 enters the next ice-making cooler 12 as a liquid refrigerant. This cooling chamber 12
Refrigerant R-12 starts to evaporate at, for example, -21°C, and -
Evaporation is completed at 15° C., and the refrigerants R-12 and R-22 all become gaseous and are sucked into the compressor 5 to complete the refrigeration cycle. Here, as mentioned above, -25℃
It exchanges heat with the main cooler 3 at a low temperature close to -15℃, and the cold air flows from the outlet A into the freezer compartment 1, which has a larger volume than the ice-making section, and the ice-making cooler 12, which has a temperature close to -15℃.
There is a small temperature difference between the cold air near the ice-making section and the cold air near the ice-making section, which has undergone heat exchange, and therefore no frosting or freezing occurs near the ice-making section. On the other hand, the ice-making section is not simply cooled by the cold air that has passed through the main cooler 3, but is directly cooled by the cold air that exchanges heat with the ice-making cooler 12, making it possible to make ice quickly. . FIG. 7 shows an example of the arrangement of the ice-making corner section 11 and the ice-making cooler 12 in this embodiment.

Another embodiment is shown in FIG. In the above embodiment, the main cooler 3 was installed on the intermediate partition wall between the freezer compartment 1 and the refrigerator 2, but in this embodiment, the cooler 3 was installed on the back of the refrigerator.
The functions and effects in this case are the same as those in the previous embodiment.

FIG. 9 again shows another embodiment. In this embodiment, an ice making section 11' and an ice making cooler 12 are arranged above the freezing chamber 1, and an aluminum plate is used for the cooler 12 to improve heat exchange efficiency. In this embodiment, as described above, an aluminum plate is used for the cooler 12, which not only has the advantage of a clean appearance but also provides a better ice-making effect.

As is clear from the above explanation, the present invention can achieve the following effects.

1. It is possible to make ice in a shorter time than before without causing frosting or freezing in the ice making section in the freezer compartment.

2. No other special measures are required for defrosting or preventing icing.

3. It can be easily implemented by simply adding an ice-making cooler to a conventional fan-cooled refrigerator without extensive modification.

4 Does not affect the cooling effect of the refrigerator compartment in any way.

[Brief explanation of the drawing]

Figure 1 is a vertical cross-sectional view of a conventional fan-cooled refrigerator, Figure 2 is a block diagram showing the refrigerant system, and Figure 3 is a diagram of a conventional fan-cooled refrigerator equipped with a freezer compartment cooler. FIG. 4 is a vertical cross-sectional view of a refrigerator showing an embodiment of the present invention. FIG. 6 is a block diagram of the refrigerant path. FIG. 7 is a perspective view showing the arrangement of an ice-making corner and an ice-making cooler, and FIGS. 8 and 9 are longitudinal cross-sectional views of a refrigerator showing other embodiments of the present invention. In the figure, 1 is a freezer compartment, 2 is a refrigerator compartment, 3 is a main cooler, 4 is a fan, 5 is a compressor, 6 is a condenser, 7 is a capillary reach tube, 8 is a damper for flow rate adjustment, and 9 is a freezing compartment 10 is a capillary reach tube, 11 and 11' are ice-making corners, and 12 is an ice-making cooler.

Claims (1)

[Scope of utility model registration request] It has a refrigeration cycle in which two or more types of refrigerants with different evaporation temperatures are mixed and sealed, and a fan supplies cold air from a main cooler installed in a part of the refrigerator compartment to a refrigerator compartment and a freezer compartment equipped with an ice-making unit. What is claimed is: 1. A refrigerator in which an ice-making section cooler disposed in the ice-making section is connected to a downstream side of a refrigeration cycle from a main cooler.