CN221223046U - Heat exchange structure of evaporator and refrigerator - Google Patents

Abstract

The utility model discloses a heat exchange structure of an evaporator and a refrigerator, comprising a second evaporator, wherein one side of the second evaporator is provided with a second air duct, the other side of the second evaporator opposite to the second air duct is provided with a second tank liner side wall, a first bypass channel is formed between two sides of a shell of the second evaporator and the second air duct and the second tank liner side wall respectively, and the width of the lower part of the first bypass channel is larger than that of the upper part of the first bypass channel; the first bypass channel is used for circulating outside air and exchanging heat with the second evaporator. The first bypass channel is not easy to be blocked after frosting is carried out on the lower part of the second evaporator, so that the outside air can still continuously rise to the upper part of the second evaporator from the first bypass channel to carry out effective heat exchange, the heat exchange efficiency of the second evaporator is further improved or kept unchanged, and the condition that the heat exchange efficiency of the second evaporator is suddenly reduced is avoided.

Description

Heat exchange structure of evaporator and refrigerator

Technical Field

The utility model relates to the technical field of refrigeration, in particular to a heat exchange structure of an evaporator and a refrigerator.

Background

The evaporator in the refrigerator is a heat exchanger, and the heat exchange efficiency of the evaporator is related to the heat exchange system of the evaporator. As shown in fig. 1, most of the heat exchange structures of the current evaporators are composed of a first evaporator 100, a first air duct 200 and a first liner sidewall 300, wherein the first evaporator 100 is composed of a coil and fins, the first air duct 200 is arranged at one side of the first evaporator 100, and the first liner sidewall 300 is arranged at the other side of the first evaporator 100.

The heat exchange structure of the existing evaporator has the following defects:

1. The first passages 400 formed between the first air duct 200 and the first liner side wall 300 are respectively formed at both sides of the first evaporator 100 to be as wide and narrow as possible, and thus, the bypass passage cannot be formed, so that once the lower part of the first evaporator 100 is blocked by the frost formation due to the heat exchange, the outside air cannot continuously rise from the first passages 400 to the upper part of the first evaporator 100 to perform effective heat exchange, and the heat exchange efficiency of the first evaporator 100 is further drastically reduced.

2. All fins inside the first evaporator 100 are equal in width, so that second channels formed between adjacent fins and the inner side walls of the corresponding first evaporator 100 are narrow, hot and humid air can only circulate from the second channels and exchange heat, frosting of the second channels at the lower part of the first evaporator 100 is easily caused, once the second channels close to the lower part of the first evaporator 100 are severely frosted due to heat exchange, the second channels at the lower part of the first evaporator 100 are blocked, hot and humid air cannot continuously rise to exchange heat, and therefore all fins above the blocking of the second channels cannot continuously participate in heat exchange, so that the heat exchange efficiency of the first evaporator 100 is drastically reduced.

Disclosure of utility model

In view of this, the utility model provides a heat exchange structure of an evaporator and a refrigerator, which are used for solving the problem that in the prior art, after the lower part of a first evaporator is frosted and blocked due to heat exchange, external air cannot continuously rise to the upper part of the first evaporator from a gap to perform effective heat exchange, so that the heat exchange efficiency of the first evaporator is rapidly reduced.

In order to achieve one or a part of or all of the above objects or other objects, the present utility model provides a heat exchange structure of an evaporator, including a second evaporator, wherein a second air duct is disposed on one side of the second evaporator, a second liner sidewall is disposed on the other side of the second evaporator opposite to the second air duct, a first bypass channel is formed between two sides of a housing of the second evaporator and the second air duct and the second liner sidewall, and a width of a lower portion of the first bypass channel is larger than a width of an upper portion of the first bypass channel;

The first bypass channel is used for circulating outside air and exchanging heat with the second evaporator.

Further, a plurality of first fins and a plurality of second fins are arranged in the shell;

The first fins and the second fins are horizontally arranged at intervals along the height direction of the second evaporator, and a second bypass channel is formed by the adjacent first fins, second fins and the corresponding inner side walls of the shell;

The second bypass channel is used for facilitating circulation of hot and humid air in the second evaporator and exchanging heat with the first fins and the second fins.

Further, the width of the first fin is larger than the width of the second fin.

Further, a step portion is provided between the upper portion and the lower portion of the first bypass passage, and the width of the step portion gradually increases from the upper portion to the lower portion of the first bypass passage.

Further, the width of the upper part of the first bypass channel is equal in width, and the value range of the width is 3-5mm.

Further, the width of the lower part of the first bypass channel is equal in width, and the value range of the width is 10-15mm.

Further, the height of the lower part of the first bypass channel is 5-15mm.

Further, the shell is made of any one of aluminum, copper and stainless steel.

Further, the first fin and the second fin are made of any one of aluminum and copper.

A refrigerator comprises the heat exchange structure of the evaporator.

Compared with the prior art, the utility model has at least the following beneficial effects:

1. The first bypass channel is not easily blocked after frosting is generated by heat exchange at the lower part of the second evaporator, so that the outside air can still continuously rise to the upper part of the second evaporator from the first bypass channel to perform effective heat exchange, the heat exchange efficiency of the second evaporator is further improved or kept unchanged, and the condition that the heat exchange efficiency of the second evaporator is suddenly reduced is avoided;

2. according to the utility model, the second bypass channel is formed by the adjacent first fins, second fins and the corresponding inner side walls of the shell, and the second bypass channel is easily blocked after frosting is generated by heat exchange at the lower part of the second evaporator, so that the hot and humid air can still continuously rise to the first fins and the second fins at the upper part of the second evaporator from the second bypass channel to perform effective heat exchange, and further the first fins and the second fins at the upper part of the second evaporator can still participate in heat exchange, thereby further improving the heat exchange efficiency of the second evaporator and avoiding the condition that the heat exchange efficiency of the second evaporator is rapidly reduced.

Drawings

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs; the terminology used in the description of the applications herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model; the terms "comprising" and "having" and any variations thereof in the description of the utility model and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion. The terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order.

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.

FIG. 1 is a schematic view of a heat exchange structure of a prior art evaporator;

FIG. 2 is a schematic view of a heat exchange structure of an evaporator according to the present utility model;

fig. 3 is an enlarged schematic view of reference symbol a in fig. 2;

FIG. 4 is a cross-sectional view of one of the second evaporators of the present utility model;

FIG. 5 is another cross-sectional view of the second evaporator of the utility model;

fig. 6 is a partial schematic view of the inside of the refrigerator of the present utility model.

Reference numerals:

10. A second evaporator;

101. a housing;

102. A first fin;

103. A second fin;

104. A second bypass passage;

105. A step portion;

20. a second air duct;

30. The side wall of the second container;

40. a first bypass passage;

100. A first evaporator;

200. A first air duct;

300. the side wall of the first container;

400. a first channel.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model. Thus, reference throughout this specification to one feature will be used in order to describe one embodiment of the utility model, not to imply that each embodiment of the utility model must be in the proper motion. Furthermore, it should be noted that the present specification describes a number of features. Although certain features may be combined together to illustrate a possible system design, such features may be used in other combinations not explicitly described. Thus, unless otherwise indicated, the illustrated combinations are not intended to be limiting.

The principles and structures of the present utility model are described in detail below with reference to the drawings and the examples.

As an embodiment, referring to fig. 2-6, the present utility model proposes a heat exchange structure of an evaporator, including a second evaporator 10, one side of the second evaporator 10 is provided with a second air duct 20, the other side of the second evaporator 10 opposite to the second air duct 20 is provided with a second liner sidewall 30, two sides of a housing 101 of the second evaporator 10 form a first bypass channel 40 with the second air duct 20 and the second liner sidewall 30 respectively, and a width of a lower portion of the first bypass channel 40 is greater than a width of an upper portion of the first bypass channel 40.

The first bypass passage 40 is used for circulating outside air and exchanging heat with the second evaporator 10.

In this embodiment, when the second evaporator 10 is started up, the second evaporator 10 exchanges heat with the outside air flowing through the first bypass passage 40. Compared with the prior art that the first channel 400 is formed between the two sides of the first evaporator 100 and the first air duct 200 and the first liner sidewall 300 respectively, the first channel 400 is equally wide and narrow, but outside air flows through the first channel 400 formed between the two sides of the first evaporator 100 and the first air duct 200 and the first liner sidewall 300 respectively and exchanges heat, but the narrow lower part of the first evaporator 100 easily blocks the first channel 400 due to frosting, so that hot and humid air cannot continuously rise to exchange heat, and the first channel 400 above the blocked part cannot continuously participate in heat exchange. In the present utility model, the first bypass channel 40 is formed between the two sides of the second evaporator 10 and the second air duct 20 and the second liner side wall 30, and compared with the conventional first channel 400, the width of any part of the first bypass channel 40 is larger than that of the first channel 400, and the width of the lower part of the first bypass channel 40 is larger than that of the upper part of the first bypass channel 40, so that the first bypass channel 40 is not easily blocked even if the lower part of the second evaporator 10 frosts due to heat exchange, and the outside air can still continuously rise from the first bypass channel 40 to the upper part of the second evaporator 10 for effective heat exchange, thereby improving the heat exchange efficiency of the second evaporator 10 or keeping the heat exchange efficiency of the second evaporator 10 unchanged, and preventing the heat exchange efficiency of the second evaporator 10 from being rapidly reduced.

In this embodiment, referring to fig. 4, a plurality of first fins 102 and a plurality of second fins 103 are disposed in the housing 101; wherein the width of the first fin 102 is larger than the width of the second fin 103.

The first fins 102 and the second fins 103 are horizontally arranged at intervals along the height direction of the second evaporator 10, and the adjacent first fins 102, second fins 103 and corresponding inner side walls of the housing 101 form a second bypass channel 104.

The second bypass passage 104 is used for facilitating circulation of hot and humid air inside the second evaporator 10 and exchanging heat with the first fin 102 and the second fin 103.

Compared with the prior art that the width of all fins in the interior of the first evaporator 100 is equal, a second channel is formed between the adjacent fins and the corresponding inner side walls of the first evaporator 100, the second channel is narrow, but the hot and humid air in the first evaporator 100 circulates in the second channel between the fins and exchanges heat, and the second channel at the lower part of the first evaporator 100 is very easy to be blocked due to frosting, so that the hot and humid air cannot continuously rise to exchange heat, and all the fins above the blocked part cannot continuously participate in the heat exchange. The first fins 102 and the second fins 103 are horizontally arranged in the second evaporator 10 at intervals along the height direction of the second evaporator 10, and the width of the first fins 102 is larger than that of the second fins 103, so that the adjacent first fins 102, second fins 103 and the corresponding inner side walls of the shell 101 form second bypass channels 104, and compared with the second channels formed in the prior first evaporator 100, the second bypass channels 104 have larger size, so that even if the second bypass channels 104 at the lower part of the second evaporator 10 exchange heat, the second bypass channels 104 are not easily blocked, and the hot humid air can still continuously rise to the first fins 102 and the second fins 103 at the upper part of the second evaporator 10 from the second bypass channels 104 for effective heat exchange, so that the first fins 102 and the second fins 103 at the upper part of the second evaporator 10 still can still exchange heat, and further the heat exchange efficiency of the second evaporator 10 can be further improved, and the heat exchange efficiency of the second evaporator 10 cannot be suddenly reduced.

4-5, Considering the practical application environment and frosting condition of the second evaporator 10, the following cases are horizontally arranged at intervals along the height direction of the second evaporator 10 by the first fins 102 and the second fins 103:

one is that a second fin 103 is provided between every two adjacent first fins 102.

And two or more second fins 103 are arranged between every two adjacent first fins 102.

Third, one second fin 103 is provided in every two or more first fins 102.

In this way, the number and the degree of the density of the first fins 102 and the second fins 103 can be adjusted by different setting modes, so that the number and the distribution of the second bypass channels 104 when the hot and humid gas flows upwards from the lower side of the second evaporator 10 can be adjusted, and the heat exchange efficiency can be improved by combining the actual frosting condition. In the present utility model, the first fin 102 and the second fin 103 are preferably arranged in the first manner: a second fin 103 is provided between each adjacent two of the first fins 102.

In this embodiment, referring to fig. 2, a step 105 is provided between the upper and lower portions of the first bypass passage 40, and the width of the step 105 gradually increases from the upper portion to the lower portion of the first bypass passage 40. Thus, the outside air can better enter the upper part of the first bypass channel 40 from the lower part of the first bypass channel 40, and exchange heat with the upper part of the second evaporator 10, thereby improving the heat exchange efficiency of the second evaporator 10.

With reference to fig. 2, the width direction in the present embodiment is preferably the X direction, and the height direction in the present embodiment is preferably the Y direction.

In this embodiment, referring to fig. 2-3, the width of the upper portion of the first bypass passage 40 is equal to the width, and the width is X1, and the value of X1 is 3-5mm. If X1 is smaller than 3mm, the width of the upper portion of the first bypass passage 40 is too narrow, which makes the hot air circulation space insufficient and affects the heat exchange efficiency of the second evaporator 10.

In this embodiment, referring to fig. 2, the width of the lower portion of the first bypass passage 40 is equal to the width, and the width is X2, and the value of X2 is 10-15mm. Among them, X2 is preferably 12mm, so that the lower portion of the first bypass passage 40 is prevented from being easily clogged by frost.

Specifically, referring to fig. 2, the height of the lower portion of the first bypass passage 40 is H1, and the value of H1 ranges from 5mm to 15mm. Wherein, H1 is preferably 10mm, so that the outside air can better enter the upper part of the first bypass channel 40 from the lower part of the first bypass channel 40, and exchange heat with the upper part of the second evaporator 10, so that the frosting of the second evaporator 10 is uniform, and the heat exchange efficiency of the second evaporator 10 is improved.

Wherein, a coil is further disposed in the housing 101, and a connection relationship between the coil and the first fin 102 and the second fin 103 is a prior art, which will not be described herein.

In this embodiment, the material of the housing 101 is any one of aluminum, copper and stainless steel; of course, the material of the case 101 may be other materials having good thermal conductivity and corrosion resistance.

The shell 101 is preferably made of aluminum, so that compared with the shell 101 made of copper, the corrosion resistance of the second evaporator 10 is better, the heat conduction performance is better, the heat exchange efficiency is higher, the cost performance is higher, the heat of the outside air can be transferred to the refrigerant in the coil more quickly and effectively, and the refrigerating effect of the refrigerator is improved.

When the case 101 is made of stainless steel, the evaporator 10 has excellent corrosion resistance and stability, but has poor heat conductive property and low heat exchange efficiency.

In this embodiment, the materials of the first fin 102 and the second fin 103 are any one of aluminum and copper. Of course, the material of the first fin 102 and the second fin 103 may be other metal materials having good heat conductivity and good corrosion resistance. And the coil pipe is made of any one of aluminum and copper.

When the coil is made of copper and the first fin 102 and the second fin 103 are made of aluminum, it has advantages of good heat conductivity, high heat exchange efficiency, strong corrosion resistance, etc., but it is costly.

When the coil is made of copper, and the first fin 102 and the second fin 103 are made of copper, there are advantages in that the heat conductive property is more excellent, the heat exchange efficiency is higher, but the cost is higher.

When the coil is made of aluminum, the first fins 102 and the second fins 103 are made of aluminum, they have better heat dissipation performance, higher heat exchange efficiency, and lower cost than copper tube aluminum fins.

Therefore, in the present utility model, the materials of the first fin 102, the second fin 103 and the coil are preferably aluminum, so that the second evaporator 10 is more cost-effective.

The use flow of the heat exchange structure of the evaporator comprises the following steps:

after the second evaporator 10 is started, the first bypass channel 40 is filled with external air, so that the second evaporator 10 exchanges heat, and meanwhile, the second bypass channel 104 in the evaporator is filled with hot and humid air, and the hot and humid air exchanges heat with the first fins 102 and the second fins 103, so that the heat exchange efficiency of the second evaporator 10 is improved or the heat exchange efficiency of the second evaporator 10 is kept unchanged.

In this embodiment, referring to fig. 6, the utility model further provides a refrigerator, which includes the heat exchange structure of the evaporator.

The second evaporator 10 is located between the second air duct 20 and the second liner sidewall 30 of the refrigerator, and two sides of the housing 101 of the second evaporator 10 form a first bypass channel 40 with the corresponding second air duct 20 and second liner sidewall 30 respectively.

When the refrigerator is started, the second evaporator 10 is correspondingly started, and at the moment, the outside air flows into the first bypass channel 40 to perform wind circulation heat exchange, namely, the outside air enters the first bypass channel 40 to perform heat exchange with the second evaporator 10.

The width of the lower part of the first bypass channel 40 is larger than the width of the upper part of the first bypass channel 40, and the width of the lower part of the first bypass channel 40 is 12mm, so that even if the lower part of the second evaporator 10 frosts, the lower part of the first bypass channel 40 cannot be blocked easily, and the outside air can still enter from the lower part of the first bypass channel 40 and continuously rise to the upper part of the second evaporator 10 for effective heat exchange; meanwhile, the second bypass channel 104 in the second evaporator 10 is larger in size, and is not easy to be blocked due to frosting at the lower part of the second evaporator 10, so that the heat exchange efficiency of the second evaporator 10 is further improved or the heat exchange efficiency of the second evaporator 10 is kept unchanged, the condition that the heat exchange efficiency of the second evaporator 10 is suddenly reduced is avoided, and the refrigerating effect of the refrigerator is further improved.

It is apparent that the above-described embodiments are only some embodiments of the present utility model, but not all embodiments, and the preferred embodiments of the present utility model are shown in the drawings, which do not limit the scope of the patent claims. This utility model may be embodied in many different forms, but rather, embodiments are provided in order to provide a thorough and complete understanding of the present disclosure. Although the utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing description, or equivalents may be substituted for elements thereof. All equivalent structures made by the content of the specification and the drawings of the utility model are directly or indirectly applied to other related technical fields, and are also within the scope of the utility model.

Claims (10)

1. The utility model provides a heat transfer structure of evaporimeter, includes second evaporimeter (10), and one side of this second evaporimeter (10) is equipped with second wind channel (20), and this second evaporimeter (10) are relative the opposite side of second wind channel (20) is equipped with second case courage lateral wall (30), its characterized in that: a first bypass channel (40) is formed between two sides of a shell (101) of the second evaporator (10) and the second air duct (20) and the second liner side wall (30), and the width of the lower part of the first bypass channel (40) is larger than that of the upper part of the first bypass channel (40);

The first bypass passage (40) is used for circulating outside air and exchanging heat with the second evaporator (10).

2. The heat exchange structure of an evaporator according to claim 1, wherein:

A plurality of first fins (102) and a plurality of second fins (103) are arranged in the shell (101);

The first fins (102) and the second fins (103) are horizontally arranged at intervals along the height direction of the second evaporator (10), and a second bypass channel (104) is formed by the adjacent first fins (102), second fins (103) and the inner side wall of the corresponding shell (101);

the second bypass channel (104) is used for facilitating circulation of hot and humid air in the second evaporator (10) and exchanging heat with the first fins (102) and the second fins (103).

3. The heat exchange structure of an evaporator according to claim 2, wherein:

The width of the first fin (102) is larger than the width of the second fin (103).

4. The heat exchange structure of an evaporator according to claim 1, wherein:

A step (105) is provided between the upper and lower portions of the first bypass passage (40), and the width of the step (105) gradually increases from the upper portion to the lower portion of the first bypass passage (40).

5. The heat exchange structure of an evaporator according to claim 1 or 4, wherein:

The width of the upper part of the first bypass channel (40) is equal and wide, and the value range of the width is 3-5mm.

6. The heat exchange structure of an evaporator according to claim 1 or 4, wherein:

The width of the lower part of the first bypass channel (40) is equal in width, and the value range of the width is 10-15mm.

7. The heat exchange structure of an evaporator according to claim 1 or 4, wherein:

The height of the lower part of the first bypass channel (40) is 5-15mm.

8. The heat exchange structure of an evaporator according to claim 1, wherein:

the shell (101) is made of any one of aluminum, copper and stainless steel.

9. The heat exchange structure of an evaporator according to claim 2, wherein:

the first fin (102) and the second fin (103) are made of any one of aluminum and copper.

10. A refrigerator, characterized in that: heat exchange structure comprising an evaporator according to any one of claims 1-9.