KR20000009219U - Refrigerator with cold air bypass - Google Patents

Abstract

In the case where the evaporator of the refrigerator is overheated, a cold air bypass device is provided so as not to interfere with the circulation of the cold air. In the refrigerator divided into a freezer compartment and a refrigerating chamber for this purpose, a freezer cold air bypass passage for allowing cold air from the freezer compartment to flow from the freezer compartment to a freezing fan for the freezer without directly passing through an evaporator, and the cold air from the freezer compartment And a refrigerating compartment cold air passage allowing the flow to the refrigeration fan for the refrigerating compartment without directly passing through the evaporator.

Description

Refrigerator with cold air bypass

The present invention relates to a refrigerator, and more particularly, to a cold air bypass device capable of circulating cold air even when an evaporator or a cooler is overheated.

If the refrigerator is operated for a certain period of time, the frost is formed on the cooler, that is, the evaporator. When defrosting the defrost, not only the performance of the evaporator is degraded, but also causes the circulation of cold air, etc., the normal refrigerator is configured to operate in a defrost mode for defrosting the defrost from the evaporator. Normally, the refrigerator is switched to the defrost mode in consideration of the power consumption of the compressor and temperature changes. When the defrost mode is switched, defrosting or freezing may be eliminated or melted by the operation of the defrost heater.

However, in the refrigerator according to the prior art, which only removes the defrost depending on the defrost mode, freezing occurs in a serious state before being converted to the defrost mode, and the cold air passage is blocked, so that the cold air circulation in the refrigerator does not occur, thereby reducing the refrigeration freezing effect. Often occurred.

The present invention has been made to solve such a problem, it is an object of the present invention to provide a cold air bypass device for smoothing the circulation of cold air even when the evaporator of the refrigerator overheated.

The purpose of the present invention is a refrigerator divided into a freezer compartment and a refrigerating compartment, wherein the first bypass passage for allowing the cold air from the freezer compartment to flow from the freezer compartment to the freezing fan for the freezer without going directly through the evaporator, and the cold air from the refrigerating compartment It can be achieved by providing a refrigerator having a second bypass passage that allows the flow from the refrigerator compartment to the cooling fan for the refrigerator compartment without passing directly through the evaporator.

1 is a plan view of a refrigerator according to the present invention,

2 and 3 are cross-sectional views taken along lines II-II and III-III of FIG. 1, respectively.

4 is a plan sectional view of a refrigerator according to the present invention,

5 is a rear view illustrating a first bypass passage of the refrigerator according to the present invention.

<Explanation of symbols for main parts of drawing>

10: refrigerator 12: door

14: handle 16: body

18: freezer 20: evaporator

22: pin 24: horizontal return passage

25: outlet 26: first return section

36: first bypass passage 40: second bypass passage

44: second return section

First, FIGS. 2 and 3 illustrate a refrigerator having a cold air bypass device according to the present invention. FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1, which is a plan view of a general refrigerator, and illustrates a cooling fan accommodation space for a refrigerating compartment. As shown, the refrigerator 10 includes a freezing compartment 18 at the upper side and a refrigerating compartment 34 at the lower side thereof. A door 12 having a handle 14 is installed at the front of the freezing compartment 18, and a freezing compartment partition 41 is installed at the rear thereof to form a freezing space. The front surface of the refrigerating chamber 34 is provided with a door 12 with a handle 14 attached thereto, and a rear wall filled with urethane foam is provided at the rear thereof.

Referring to FIGS. 2 and 4, a cooler, that is, an evaporator 20, is installed in the rear of the freezing chamber 18. The evaporator 20 has a plurality of fins 22 formed on the surface thereof. In the upper portion of the evaporator 20, a blower fan receiving space 28 for a refrigerating chamber is formed. The storage space 28 is provided with a cooling fan 32 for the refrigerating chamber. The refrigerating chamber blowing fan 32 serves to flow the cold air in the accommodation space 28 to the refrigerating chamber 34 through a refrigerating chamber cold air duct (not shown). The refrigerating chamber blowing fan 32 is driven by the drive motor 30. The cold air flowing into the refrigerating compartment 34 circulates in the refrigerating compartment and returns to the accommodation space 28 through the outlet 25.

The refrigerating compartment cold air rises to the rear surface of the evaporator 20 through the horizontal section of the outlet 25, the first return section 26, and the second return section 44 during the return process. It will return to the receiving space 28 through. One is an evaporator contact passage 35 formed between the vertical plate 42 and the evaporator 20, where the cold air passing through the passage is directly raised by passing through the fin 22 of the evaporator 20. The other passage is the first bypass passage 36 formed by the vertical plate 42 and the rear wall 13, in which cold air flows into the receiving space 28 without directly contacting the fin 22. . According to the first bypass passage 36, when the frost is over-evaporated on the evaporator 20 and freezing occurs on the pin 22, the evaporator contact passage 35 is blocked as in the conventional refrigerator so that the cold air is blown in the refrigerating chamber. It is possible to prevent the phenomenon that the cold air supply to the refrigerating chamber is blocked because the fan 32 is not reached.

Referring to FIGS. 3 and 4, FIG. 3 is a cross-sectional view taken along line III-III of FIG. 1 and shows a receiving space 29 for a blower fan 33 for a freezer compartment. The blower fan receiving space 29 for the freezing compartment is formed at the upper portion of the evaporator 20. The accommodation space 29 is provided with a blowing fan 33 for a freezer compartment. The freezing chamber blowing fan 33 serves to introduce the cold air in the accommodation space 29 into the freezing chamber 18 through the cold air inlet 39. The freezing chamber blowing fan 33 is driven by the drive motor 31. The cold air introduced into the freezer compartment 18 circulates in the freezer compartment and returns to the accommodation space 29 through the outlet 13.

In the process of returning the freezer cold air, the outlet 13, the horizontal return section 24, and the second bypass passage 40 are raised to the front of the evaporator 20. The second bypass passage 40 formed by the evaporator 20 and the partition wall 41 passes through the second bypass passage 40 by forming a considerable clearance between the evaporator 20 and the partition wall 41. Part of the cold air is raised in contact with the fin 22, and part of the cold air is introduced into the receiving space 28 without being in contact with the fin 22. According to the second bypass passage 36, when the frost is excessively formed on the evaporator 20 and freezing occurs on the fin 22, the front surface of the partition 41 and the evaporator 20 are narrow as in the conventional refrigerator. When the evaporator 20 is over-formed by forming a space, the cold air circulation passage is blocked so that the cold air does not reach the blower fan 33 for the freezer compartment, thereby preventing the supply of cold air to the freezer compartment.

As can be seen in FIG. 5, the first bypass passage 36, which is a cold air bypass passage to the cold storage fan 32, has a first sidewall that is approximately inclined when viewed from the rear of the refrigerator 10. In addition, the second side wall is formed in a substantially vertical straight shape to form a passage connecting the second return section 44 and the receiving space 28. In addition, the inlet portion of the first bypass passage connected to the second return section 44 is preferably about 2/3 of the size of the evaporator 20 in the transverse direction.

According to the bypass passage according to the present invention, even when the evaporator is over-heated and the cold air circulation passage passing directly through the evaporator is blocked, it frequently occurs in the conventional refrigerator because the cold air circulation can be secured to some extent until the defrost mode is switched. It is possible to prevent the cold cycle circulation to occur almost.

Claims (2)

A refrigerator divided into a freezer compartment and a refrigerating compartment, comprising: a first bypass passage allowing cold air from the freezer compartment to flow from the freezer compartment to a freezing fan for the freezer without directly passing through an evaporator; and a cold air from the refrigerating compartment for the cold compartment And a second bypass passage allowing flow to the blower fan without directly passing through the evaporator. 2. The refrigerator according to claim 1, wherein the inlet of the second bypass passage has a transverse length of approximately 2/3 of the transverse length of the evaporator.