KR19990008917A - Defrost efficiency improvement structure of evaporator for refrigerator - Google Patents

Abstract

The present invention relates to an evaporator for use in a refrigerator, and in particular, to form a evaporator by forming a refrigerant flow channel having different hot spacing between the refrigerant flow paths so as to equalize the density of the advancing in the air flow direction. Minimize the reduction.

Description

Defrost efficiency improvement structure of evaporator for refrigerator

The present invention relates to an evaporator for use in a refrigerator, and in particular, to form a evaporator by forming a refrigerant flow channel having different hot spacing between the refrigerant flow paths so as to equalize the density of the advancing in the air flow direction. The goal is to minimize the reduction of

A schematic form of a conventional evaporator used in a refrigerator is a refrigerant flow channel 1 in which a low-temperature refrigerant flows inside as shown in FIGS. 1 and 2, and is stacked on the surface of the refrigerant flow path 1 to provide air and refrigerant. Fins 2 for promoting heat transfer are configured between them.

The conventional evaporator has the same fin 1 spacing in the A direction through which air travels, and the spacing of the fins 2 in each row R1 to RN decreases as the heat increases.

The evaporator configured as described above has a refrigerant having a low temperature of about −40 ° C. inside the refrigerant flow path 1, and thus the surfaces of the refrigerant flow path 1 and the fin 2 are below the freezing point of water, as shown in FIG. 2. Frost 3 is generated on the surfaces of the refrigerant flow path 1 and the fins 2.

The progress of the frost (3) acts as a thermal resistance in the heat exchange between the refrigerant flow path (1) and the air, the growth of the frost (3) in the first row that is in primary contact with the air in the process It is fast and the growth of frost 3 decreases as the heat progresses.

For this reason, the reduction in heat transfer in the first row (R1) is the largest compared to the other heat has a problem that the overall efficiency of the heat exchanger is lowered.

The present invention has been made in view of the above-mentioned problems, and the evaporator is constructed by manufacturing a refrigerant flow passage tube of a type having a different heat interval in a sequential manner as far as possible.

1 is a schematic diagram of a conventional evaporator.

Figure 2 is a frost generation in the refrigerant flow path and fin in the conventional evaporator.

Figure 3 is a schematic diagram of the evaporator with a different interval between the refrigerant flow channel as the present invention.

*** Explanation of symbols for main parts of drawing ***

101: refrigerant path pipe 102: pin

The defrosting efficiency improving structure of the refrigerator evaporator of the present invention will be described below with reference to the accompanying drawings.

3, the configuration of the refrigerant flow path 101 through which a low-temperature refrigerant flows and the fin 102 for promoting heat transfer between the air and the refrigerant on the surface of the refrigerant flow path 101 are the same as in the related art. In the present invention, the distance between the refrigerant flow paths 101 between the first row R1 and the second row R2, which has the fastest growth of frost, is the farthest, and the rows R1 to RN As the evaporator proceeds, the refrigerant flow path 101 is formed to have a smaller difference between heat transfer and heat transfer.

As described above, the gap between the first row R1 and the second row R2 of the refrigerant flow path 101 is increased to the greatest value, and as the heat progresses, the gap between the heat transfer and the after heat is gradually decreased to increase the frost growth rate. By uniformly inducing the density of frost implanted on the refrigerant flow passage 101 showing

Formation of the refrigerant flow path 101 serves to reduce the humidity difference that causes the implantation.

Accordingly

The frost density in each row (R1 to RN) is maintained uniformly, improving the thermal performance of the entire evaporator, and also delaying the blocking phenomenon due to frost growth that progresses over time.

As described above, the present invention forms a coolant flow channel by providing a gap between the rows of the coolant flow pipes through which the coolant passes, thereby reducing the humidity difference that causes frosting and inducing the density of frost in each row uniformly. This improves the thermal performance of the entire heat exchanger, and has the effect of delaying the blocking phenomenon due to frost growth that progresses over time.

Claims (2)

In an evaporator composed of a refrigerant flow channel through which a low-temperature refrigerant flows, and fins vertically stacked to increase the contact area with air in the refrigerant flow path to promote heat exchange. The refrigerant flow pipe is The defrosting efficiency improvement structure of the evaporator for refrigerators formed by making each hot gap | differential space different. The method of claim 1, The refrigerant flow path defrosting structure of the refrigerator evaporator, characterized in that the interval between the heat is formed to be reduced as the heat proceeds.