WO2020233098A1

WO2020233098A1 - Heat exchanger and electrical device

Info

Publication number: WO2020233098A1
Application number: PCT/CN2019/123357
Authority: WO
Inventors: 林晨; 岳宝; 江晨钟; 何仁庶
Original assignee: 广东美的白色家电技术创新中心有限公司; 美的集团股份有限公司
Priority date: 2019-05-17
Filing date: 2019-12-05
Publication date: 2020-11-26
Also published as: CN111947486A; CN111947486B

Abstract

The present application relates to the technical field of household appliances, and disclosed thereby are a heat exchanger and an electrical device. The heat exchanger comprises a first heat exchange fin; the first heat exchange fin comprises a first base and a bent portion that are connected; the first base is sleeved on a first pipe section and is provided with a first side edge extending along a first preset direction; the bent portion is connected to the first base along the first side edge and is disposed so as to be bent relative to the first base. By means of the described means, the present application may reduce the thickness of the heat exchanger without affecting the heat exchange capabilities of the heat exchanger.

Description

Heat exchanger and electrical equipment

This application claims the priority of the Chinese patent application filed on May 17, 2019 with the application number 2019104151516 and the invention title "heat exchanger and electrical equipment", which is fully incorporated into this application by reference.

【Technical Field】

This application relates to the technical field of household appliances, in particular to a heat exchanger and electrical equipment.

【Background technique】

Nowadays, refrigerators in household appliances are widely used. Refrigerator is a kind of refrigeration equipment that keeps the food or other items stored in low temperature. For air-cooled refrigerators, it uses an internal evaporator to create a low-temperature environment in the storage area of the refrigerator to achieve corresponding freezing and refrigeration functions.

At present, the evaporator used in refrigerator products usually has a flat heat exchange fin structure, that is, the surface of the fin is flat, which causes the thickness of the evaporator to be too large, which is not conducive to the ultra-thin design of the refrigerator. The home decoration design of the refrigerator has adverse effects.

[Content of the invention]

In view of this, the main technical problem solved by this application is to provide a heat exchanger and electrical equipment, which can reduce the thickness of the heat exchanger without affecting the heat exchange capacity of the heat exchanger.

In order to solve the above technical problems, a technical solution adopted in this application is to provide a heat exchanger, which has first and second sides that are arranged at intervals along a first preset direction and are opposed to each other. The heat exchanger includes Heat exchange tubes and at least two heat exchange fins. The heat exchange tube includes at least two first tube sections and at least one second tube section, wherein at least two first tube sections are spaced apart from each other along a first preset direction, and the second tube section connects adjacent ends of the at least two first tube sections Part, so that the heat exchange tube is arranged in a serpentine shape. The at least two heat exchange fins are sleeved on the first pipe section and are arranged at intervals along the extension direction of the first pipe section, wherein the at least two heat exchange fins include first heat exchange fins, and the first heat exchange fins include The first base and the bent part are connected. The first base is sleeved on the first pipe section and has a first side extending along a first predetermined direction. The bent part is connected to the first base along the first side and opposite to The first base is bent and arranged.

In order to solve the above technical problem, another technical solution adopted by this application is to provide an electrical equipment, the electrical equipment includes a heat exchanger, the heat exchanger has a first predetermined direction spaced apart and opposite first side and On the second side, the heat exchanger includes a heat exchange tube and at least two heat exchange fins. The heat exchange tube includes at least two first tube sections and at least one second tube section, wherein at least two first tube sections are spaced apart from each other along a first preset direction, and the second tube section connects adjacent ends of the at least two first tube sections Part, so that the heat exchange tube is arranged in a serpentine shape. The at least two heat exchange fins are sleeved on the first pipe section and are arranged at intervals along the extension direction of the first pipe section, wherein the at least two heat exchange fins include first heat exchange fins, and the first heat exchange fins include The first base and the bent part are connected. The first base is sleeved on the first pipe section and has a first side extending along a first predetermined direction. The bent part is connected to the first base along the first side and opposite to The first base is bent and arranged.

The beneficial effect of the present application is: different from the prior art, the present application provides a heat exchanger. The bent portion of the first heat exchange fin of the heat exchanger is bent and arranged relative to the first base, so that the When the area of the heat exchange fin is constant, the size of the first heat exchange fin portion corresponding to the bent portion in the thickness direction of the heat exchanger is smaller than the size in the thickness direction of the heat exchanger when it is not bent, That is to say, the setting of the bent bent portion reduces the size of the first heat exchange fin in the thickness direction of the heat exchanger, thereby reducing the thickness of the heat exchanger, while the heat exchange area provided by the bent portion is not affected. influences. Therefore, the heat exchanger provided by the present application can reduce the thickness of the heat exchanger without affecting the heat exchange capacity of the heat exchanger, thereby reducing the space occupied by the heat exchanger, which is beneficial to the application of the heat exchanger The ultra-thin design of refrigerators and other electrical equipment and the improvement of the volume ratio of refrigerators and other electrical equipment using the heat exchanger.

【Explanation of drawings】

The drawings here are incorporated into the specification and constitute a part of the specification, show embodiments that conform to the application, and are used together with the specification to explain the principle of the application. In addition, these drawings and text description are not intended to limit the scope of the concept of the present application in any way, but to explain the concept of the present application to those skilled in the art by referring to specific embodiments.

Figure 1 is a schematic structural diagram of a first embodiment of a heat exchanger according to the present application;

Figure 2 is a schematic structural diagram of a second embodiment of the heat exchanger of the present application;

3 is a schematic structural diagram of an embodiment of the first heat exchange fin of the present application;

Fig. 4 is a schematic top view of the third embodiment of the heat exchanger of the present application;

Fig. 5 is a schematic top view of a part of the heat exchanger shown in Fig. 4;

Fig. 6 is a schematic top view of a fourth embodiment of the heat exchanger of the present application;

Fig. 7 is a schematic top view of the fifth embodiment of the heat exchanger of the present application;

Fig. 8 is a schematic top view of the sixth embodiment of the heat exchanger of the present application;

Figure 9 is a schematic top view of the seventh embodiment of the heat exchanger of the present application;

Fig. 10 is a schematic top view of the eighth embodiment of the heat exchanger of the present application;

Fig. 11 is a schematic top view of the ninth embodiment of the heat exchanger of the present application;

Figure 12 is a schematic structural diagram of a tenth embodiment of a heat exchanger according to the present application;

Figure 13 is a schematic structural diagram of an eleventh embodiment of a heat exchanger according to the present application;

Fig. 14 is a partial structural diagram of a twelfth embodiment of a heat exchanger according to the present application;

15 is a schematic structural diagram of an embodiment of the electrical equipment of the present application;

Fig. 16 is a schematic structural diagram of another embodiment of the electrical equipment of the present application.

【Detailed ways】

In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in the embodiments of this application will be described clearly and completely in combination with the embodiments of this application. Obviously, the described embodiments are part of the implementation of this application. Examples, not all examples. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of this application. In the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

In order to solve the technical problem of the large thickness of the heat exchanger in the prior art, an embodiment of the present application provides a heat exchanger. The heat exchanger has a first side and a second side that are arranged at intervals along a first preset direction and are opposite to each other. On both sides, the heat exchanger includes a heat exchange tube and at least two heat exchange fins. The heat exchange tube includes at least two first tube sections and at least one second tube section, wherein at least two first tube sections are spaced apart from each other along a first preset direction, and the second tube section connects adjacent ends of the at least two first tube sections Part, so that the heat exchange tube is arranged in a serpentine shape. The at least two heat exchange fins are sleeved on the first pipe section and are arranged at intervals along the extension direction of the first pipe section, wherein the at least two heat exchange fins include first heat exchange fins, and the first heat exchange fins include The first base and the bent part are connected. The first base is sleeved on the first pipe section and has a first side extending along a first predetermined direction. The bent part is connected to the first base along the first side and opposite to The first base is bent and arranged. The details are described below.

In existing air-cooled refrigerators, the evaporator of the refrigerator is usually placed on the back of the refrigerator, and the thickness direction of the evaporator is the thickness direction of the refrigerator. The fin on the existing evaporator usually adopts a flat structure, that is, the fin itself is a flat structure. In addition, the fins on the evaporator are usually placed perpendicular to the back of the refrigerator, that is, the size of the fins in the direction perpendicular to the back of the refrigerator is the thickness of the evaporator. However, the flat fin structure causes the evaporator to have a larger thickness, which in turn leads to a larger thickness of the refrigerator, which is not conducive to the ultra-thin design of the refrigerator. In addition, the fins of the flat fin structure result in a larger thickness of the evaporator, which in turn causes the evaporator to occupy more space inside the refrigerator, resulting in a reduction in the storage space inside the refrigerator, which means that the volume ratio of the refrigerator is reduced.

However, if the thickness of the evaporator is simply reduced, that is, the size of the fins in the direction perpendicular to the back of the refrigerator is reduced, the heat exchange capacity of the evaporator will be greatly reduced, and it will especially seriously affect the frosting of the evaporator. The heat exchange capacity under working conditions makes it impossible to meet the normal cooling demand of the refrigerator. In addition, it will also cause large flow resistance on the wind side of the evaporator, making it difficult for the air volume circulating in the refrigerator to meet the demand, or in order to ensure that the air volume circulating in the refrigerator can meet the demand, the fan is required to have greater power, which improves the fan Equipment requirements.

In view of this, an embodiment of the present application provides a heat exchanger to solve the above-mentioned technical problems in the prior art, which will be described in detail below:

Please refer to FIG. 1, which is a schematic structural diagram of a first embodiment of a heat exchanger according to the present application.

In an embodiment, the heat exchanger 1 has a first side 11 and a second side 12 that are spaced apart along the first predetermined direction Y and opposite to each other. The first side 11 and the second side 12 serve as the air inlet side and the air outlet side of the heat exchanger 1 respectively. The heat exchange airflow enters the heat exchanger 1 from the air inlet side and flows out from the air outlet side of the heat exchanger 1. The heat exchanger 1 can be the above-mentioned evaporator used in the refrigerator. The refrigerant is passed through the heat exchanger 1 and the temperature is relatively low, and the heat exchange airflow takes away the heat in the storage area of the refrigerator, so it is removed from the heat exchanger 1 The temperature of the heat exchange airflow entering from the inlet side is relatively high. After being cooled by the heat exchanger 1, the temperature of the heat exchange airflow drops and feeds back to the storage area of the refrigerator, so that the storage area of the refrigerator is kept at a low temperature, thereby realizing the freezing of the refrigerator And the function of refrigeration.

Of course, the heat exchanger 1 provided in this embodiment is not limited to being used in refrigerators, and other electrical equipment requiring heat exchange can also use the heat exchanger 1 provided in this embodiment, and the form of heat exchange is not limited. The cooling and heating are not limited here.

The heat exchanger 1 includes a heat exchange tube 13 into which a medium for heat energy exchange (such as the refrigerant mentioned above) is passed. The heat exchange tube 13 includes at least two first tube sections 131 and at least one second tube section 132. The at least two first pipe sections 131 are spaced apart from each other along the first preset direction Y, and the second pipe section 132 connects adjacent ends of the at least two first pipe sections 131, so that the heat exchange tube 13 is serpentine Set up. The serpentine heat exchange tube 13 is beneficial to increase the contact area (ie heat exchange area) between the heat exchange tube 13 and the heat exchange airflow, thereby increasing the heat exchange capacity of the heat exchange tube 13 to improve the heat exchange tube 13 The heat transfer effect. Wherein, in order to make the heat exchange tube 13 arranged in a serpentine shape, the above-mentioned second tube section 132 connects the adjacent ends of the at least two first tube sections 131, specifically the two ends of the first tube section 131 and the first tube section respectively. Adjacent ends of different first pipe sections 131 adjacent to each other are connected by a second pipe section 132.

It should be noted that the at least two first pipe sections 131 are spaced apart from each other along the first predetermined direction Y, which does not mean that the first pipe sections 131 are required to be coplanar and strictly distributed along the first predetermined direction Y. The distribution direction of 131 may be at a certain angle to the first preset direction Y, or a part of the first pipe section 131 and the remaining first pipe section 131 in the at least two first pipe sections 131 may be arranged in different planes. Each of the above two cases The first pipe sections 131 still present a form of being spaced apart from each other along the first preset direction Y.

For example, FIG. 2 shows that in the at least two first pipe sections 131, some of the first pipe sections 131 and the remaining first pipe sections 131 are arranged in different planes. In the first preset direction Y, the at least two first pipe sections 131 Adjacent ends of the tube are connected by the second pipe section 132, so that the heat exchange tube 13 is arranged in a serpentine shape. Wherein, the second pipe section 132 is in an inclined form to connect the adjacent ends of the at least two first pipe sections 131.

Optionally, the first pipe section 131 of the heat exchange tube 13 is preferably a straight pipe, and the second pipe section 132 is preferably a bent pipe. The adjacent ends of the adjacent first pipe sections 131 are connected by the second pipe section 132, so that the The heat pipe 13 is arranged in a serpentine shape as described above.

Please refer to FIGS. 1 and 3. FIG. 3 is a schematic structural diagram of an embodiment of the first heat exchange fin of the present application.

The heat exchanger 1 also includes at least two heat exchange fins 14. The at least two heat exchange fins 14 are sleeved on the first pipe section 131 of the heat exchange tube 13 and are arranged at intervals along the extending direction of the first pipe section 131. The at least two heat exchange fins 14 include first heat exchange fins 141. The first heat exchange fin 141 includes a first base portion 1411 and a bent portion 1412 that are connected. The first base 1411 is sleeved on the first pipe section 131 to realize the connection between the first heat exchange fin 141 and the heat exchange tube 13, and at the same time play a role in temperature transmission, that is, the temperature of the heat exchange tube 13 will affect the first heat exchange The temperature of the heat fin 141 is such that the first heat exchange fin 141 performs a corresponding heat exchange function. The first base 1411 has a first side 14111 extending along the first predetermined direction Y, the bent portion 1412 is connected to the first base 1411 along the first side 14111, and the bent portion 1412 is bent relative to the first base 1411 Set up. Wherein, the first side 14111 extends along the first predetermined direction Y, which does not mean that the first side 14111 is required to strictly coincide with the first predetermined direction Y. The first side 14111 may be between the first predetermined direction Y It is arranged at a certain angle, and in the first preset direction Y, the first side 14111 still extends along the first preset direction Y.

It should be noted that the thickness direction X of the heat exchanger 1 can be understood as being perpendicular to the first preset direction Y and the extension direction of the first pipe section 131 of the heat exchange tube 13. The portion of the first heat exchange fin 141 corresponding to the bent portion 1412 has a size in the thickness direction X of the heat exchanger 1 smaller than its size in the thickness direction X of the heat exchanger 1 when it is not bent. In other words, when the area of the first heat exchange fin 141 is constant, the provision of the bent portion 1412 reduces the size of the first heat exchange fin 141 in the thickness direction X of the heat exchanger 1, and The size of the first heat exchange fin 141 in the thickness direction X of the heat exchanger 1 often determines the thickness of the heat exchanger 1, which means that the bent portion 1412 provided by bending further reduces the thickness of the heat exchanger 1 , And the area of the portion of the first heat exchange fin 141 corresponding to the bent portion 1412 itself remains unchanged, that is, the heat exchange area provided by the bent portion 1412 is not affected.

Therefore, the heat exchanger 1 provided in this embodiment can reduce the thickness of the heat exchanger 1 without affecting the heat exchange capacity of the heat exchanger 1, which is beneficial to the use of the heat exchanger 1 in electrical equipment such as refrigerators. Ultra-thin design, so that the thickness of refrigerators and other electrical equipment can be easily adapted to the size of home improvement cabinets, realizing embedded home improvement design; at the same time, the reduction of the thickness of heat exchanger 1 means that the space occupied by heat exchanger 1 is reduced , Which is beneficial to increase the volume ratio of refrigerators and other electrical equipment using the heat exchanger 1. And in the environment of electrical equipment such as refrigerators, the heat exchanger 1 provided in this embodiment reduces the thickness of the heat exchanger 1 without affecting the heat exchange capacity of the heat exchanger 1, and can ensure that the heat exchanger 1 Under frosting conditions, it has sufficient heat exchange capacity to meet the normal cooling requirements of refrigerators and other electrical equipment, and can reduce the air side pressure loss of heat exchanger 1, so that refrigerators and other electrical equipment have sufficient circulating air volume or It can reduce the power requirements of the fan.

Please refer to FIG. 4, which is a schematic top view of the third embodiment of the heat exchanger of the present application.

The bent portion 1412 and the first base portion 1411 are respectively located across the first side 14111 and perpendicular to the two sides of the reference plane α of the first base portion 1411, and the bent portion 1412 is at least the cut surface of the end away from the first base portion 1411 and The reference planes α are set at a preset angle θ. It can be understood that the smaller the preset angle θ, the smaller the size of the bent portion 1412 in the thickness direction X of the heat exchanger 1, which means that the thickness of the heat exchanger 1 is smaller.

Please refer to FIG. 5. FIG. 5 is a schematic top view of a part of the heat exchanger shown in FIG. 4.

In the adjacent first heat exchange fins 141, the distance between adjacent first base portions 1411 is D, and the distance between adjacent bent portions 1412 is d, where d=Dsinθ. Since the preset angle θ is an acute angle, d<D is inevitably. That is, in the adjacent first heat exchange fins 141, the distance between adjacent first base portions 1411 is greater than the distance between adjacent bent portions 1412.

In the application environment of electrical equipment such as refrigerators, the heat exchange tube 13 transfers low temperature to the first heat exchange fin 141, showing that the temperature of the first heat exchange fin 141 is higher than the temperature of the heat exchange tube 13. Since the frosting in the area near the heat exchange tube 13 is more serious than other areas, and because the first base 1411 of the first heat exchange fin 141 is closer to the heat exchange tube 13 than the bent part 1412, The frosting of the first base part 1411 is more serious than that of the bent part 1412. In view of the above situation, in the adjacent first heat exchange fins 141, the distance between the adjacent first bases 1411 is relatively large, so that there is a larger frost-holding space between the adjacent first bases 1411. Reduce the risk of frost blocking; the bent portion 1412 is used to reduce the thickness of the heat exchanger 1, although the distance between adjacent bent portions 1412 is small, but due to the first change The degree of frosting in the area where the bent portion 1412 of the heat fin 141 is located is lower than the degree of frosting in the area where the first base portion 1411 is located. Even if the distance between the adjacent bent portions 1412 is small, frost blocking is unlikely to occur The phenomenon.

Further, in the adjacent first heat exchange fins 141, when the distance between the adjacent first base portions 1411 is constant, the smaller the preset angle θ, the correspondingly the distance between the adjacent bent portions 1412 The smaller, so the preset angle θ is preferably 20°≤θ<90°, such as 30°, 40°, 50°, 60°, 70°, 80°, etc., which can ensure that there is between adjacent bending portions 1412 Sufficient distance can effectively reduce the risk of frost blocking between adjacent bent portions 1412, and the bent portion 1412 can be bent to reduce heat exchange without affecting the heat exchange capacity of heat exchanger 1 The thickness of the device 1.

The first base 1411 of the first heat exchange fin 141 is generally arranged perpendicular to the heat exchange tube 13 (that is, perpendicular to the first tube section 131 of the heat exchange tube 13), and is opposite to the first base 1411 of the first heat exchange fin 141. In the case of being arranged perpendicular to the heat exchange tube 13, the distance between the adjacent first base portions 1411 can be made larger, thereby reducing the risk of frost blocking. The width of the first base 1411, that is, the size of the first base 1411 in the thickness direction X of the heat exchanger 1, can be selected from 6 mm to 20 mm, so that the first base 1411 can provide a sufficient heat exchange area. In addition, the aforementioned preset angle and the width of the first base 1411 can be adjusted according to the requirements for the heat exchange capacity of the heat exchanger 1 and the size of the heat exchange air duct where the heat exchanger 1 is located.

The reason why the preset angle θ is not equal to 90° is that if the preset angle θ is equal to 90°, the bent portion 1412 of the first heat exchange fin 141 and the first base portion 1411 are coplanar, which is equivalent to the first heat exchange fin The sheet 141 is not bent, so the effect of reducing the thickness of the heat exchanger 1 cannot be achieved. The reason why the preset angle θ cannot be set to [0°, 20°) is that the preset angle θ is too small, resulting in too small a distance between adjacent bent portions 1412, which may easily lead to a distance between adjacent bent portions 1412 Frost blocking has occurred. It should be noted that the bent portion 1412 and the first base portion 1411 cannot be located on the same side of the reference plane, that is, the bent portion 1412 cannot be bent to the inside, resulting in avoiding the bent portion 1412 and avoiding the bent portion 1412 from the adjacent second If a heat exchange fin 141 is too close, the distance between adjacent first heat exchange fins 141 is bound to be too large, and when the size of the heat exchange tube 13 is fixed, it will cause the heat exchange tube 13 The number of the first heat exchange fins 141 provided is reduced, so that the heat exchange area provided by the heat exchanger 1 is reduced, which adversely affects the heat exchange effect of the heat exchanger 1.

Please refer to FIG. 6. FIG. 6 is a schematic top view of the fourth embodiment of the heat exchanger of the present application.

In an embodiment, the bending portion 1412 includes at least two sub-bending portions 14121 connected, each sub-bending portion 14121 respectively extends in a direction away from the reference plane α, and each sub-bending portion 14121 is at least away from the first base portion The cut surface of the end of 1411 and the reference plane α are set at a preset angle. The preset angles between the different sub-bending portions 14121 and the reference plane α may be the same or different, and the different sub-bending portions 14121 may be bent in the same direction or in different directions, which is not limited herein.

Please continue to refer to Figure 4. In an embodiment, the bent portion 1412 is the same as the first base 1411, and adopts a planar structure, that is, the bent portion 1412 and the first base 1411 are both flat fins, except that the bent portion 1412 and the first base 1411 Set at an angle between. The bent portion 1412 in the form of a flat sheet is set at a preset angle θ between the extended surface and the reference plane α to ensure that there is sufficient distance between the adjacent bent portions 1412, which can effectively reduce the adjacent bending There is a risk of frost blocking between the bent parts 1412, and the bent part 1412 provided by bending can reduce the thickness of the heat exchanger 1 without affecting the heat exchange capacity of the heat exchanger 1.

Please refer to FIG. 7. FIG. 7 is a schematic top view of the fifth embodiment of the heat exchanger of the present application.

In an alternative embodiment, the bent portion 1412 may be different from the flat sheet form of the first base portion 1411, and the bent portion 1412 has a curved structure. In this case, it is required that the cut surface of the end of the bent portion 1412 away from the first base portion 1411 and the reference plane α be set at a predetermined angle θ to ensure that there is a sufficient distance between adjacent bent portions 1412. It can effectively reduce the risk of frost blocking between adjacent bent portions 1412, and the bent portion 1412 provided by bending can reduce the heat exchange capacity of the heat exchanger 1 without affecting the heat exchange capacity of the heat exchanger 1 thickness.

Refer to Figure 8. Further, the first base portion 1411 and the bent portion 1412 can be connected by a curved surface transition, that is, the first heat exchange fin 141 is bent with a certain arc to form the bent portion 1412, which is beneficial to maintain the first base portion 1411 and the bent portion 1411. The stability of the connection of the bent portion 1412 avoids the occurrence of fracture between the two. The reason is: if the first base part 1411 and the bending part 1412 are directly bent, the crease between the two is obvious, and the structural stability of the first heat exchange fin 141 at the crease is affected by the bending Due to the influence of folds, the structural stability is poor, and cracks are prone to occur at the creases, and even breaks between the first base portion 1411 and the bending portion 1412 are caused. Therefore, the first base part 1411 and the bent part 1412 are connected by a curved surface transition, which can effectively avoid the first heat exchange fin at the crease caused by the direct bending between the first base part 1411 and the bent part 1412 The 141 part of the sheet has an adverse effect on the structural stability.

Please continue to refer to Figure 4. In an embodiment, the first base 1411 has two first sides 14111 opposite to each other, and at least one of the two first sides 14111 of the first base 1411 is connected with a bent portion 1412. That is, of the two opposite first sides 14111 of the first base 1411, the bending portion 1412 may be connected to only one first side 14111, and the side corresponding to the first heat exchange fin 141 is bent to form a bend. Of course, each first side 14111 of the first base 1411 can be connected to a bent portion 1412, that is, corresponding to the two sides of the first heat exchange fin 141 and are bent on the first heat exchange fin 141. The case where the bent portions 1412 are respectively formed on the sides is as shown in FIG. 4.

Further, when each first side 14111 of the first base 1411 is connected to a bent portion 1412, the preset angles corresponding to the bent portions 1412 on both sides of the first base 1411 may be the same or different. In addition, the bent portions 1412 connected to the first side edges 14111 are located on the same side or different sides of the extension surface where the first base portion 1411 is located, which is not limited herein. 4 shows that each first side 14111 of the first base 1411 is connected to a bent portion 1412, and the bent portion 1412 connected to each first side 14111 is located on the same side of the extended surface of the first base 1411. 9 shows that each first side 14111 of the first base 1411 is connected to a bent portion 1412, and the bent portion 1412 connected to each first side 14111 is located on the extended surface of the first base 1411 The situation on different sides.

Please refer to FIG. 10, which is a schematic top view of the eighth embodiment of the heat exchanger of the present application.

In an embodiment, in the case where the heat exchange air duct space where the heat exchanger 1 is located is large enough, and the heat exchange capacity of the heat exchanger 1 is required to be high, the heat exchanger 1 can adopt multiple rows of heat exchange. Tube 13 form. Specifically, the heat exchanger 1 further includes a heat exchange tube assembly 133, and the heat exchange tube assembly 133 includes a heat exchange tube assembly 133 opposite to each other and along a second preset direction (that is, the direction shown by arrow X in FIG. 10, that is, the thickness of the heat exchanger 1 Direction X) At least two heat exchange tubes 13 are arranged at intervals. Figure 10 shows the case where the heat exchange tube assembly 133 includes two heat exchange tubes 13; or Figure 10 shows the embodiment corresponding to Figure 2, that is, the heat exchange tube assembly 133 only includes one heat exchange tube 13, but the In the heat exchange tube 13, part of the first tube section 131 and the remaining first tube section 131 are arranged on different surfaces. The first base 1411 of the first heat exchange fin 141 is connected to the at least two heat exchange tubes 13 at the same time. Correspondingly, the width of the first base 1411 also needs to be adaptively increased to adapt to the design of the multiple rows of heat exchange tubes 13. Of course, for the heat exchanger 1 adopting the single-row heat exchange tube 13, it can be understood that the heat exchange tube assembly 133 includes only one heat exchange tube 13. Among them, for the single-row heat exchange tube 13, the thickness of the heat exchanger 1 can be controlled between 20 mm and 30 mm; and for the double-row heat exchange tube 13, the thickness of the heat exchanger 1 can be controlled between 25 mm and 40 mm. The thickness of the conventional heat exchanger 1 is about 60 mm, which shows that the thickness of the heat exchanger 1 provided by the embodiment of the present application is greatly reduced.

Further, the first base 1411 includes at least two sub-bases 14112 spaced apart from each other along the second predetermined direction and sleeved on different first pipe sections 131. In FIG. 8, the first pipe section 131 connected to each sub-base 14112 may belong to different heat exchange tubes 13, or the first pipe section 131 connected to each sub-base 14112 belongs to the same heat exchange tube 13, but each sub-base 14112 The connected first pipe sections 131 are spaced apart from each other in the second preset direction (ie, the direction shown by the arrow X in FIG. 10).

Further, as shown in Figure 11. In the at least two sub-bases 14112, adjacent sub-bases 14112 may be connected by bending portions 1412, and the bending portions 1412 between adjacent sub-bases 14112 may also adopt the multi-segment bending described in the above embodiment. The structure is not limited here.

Please continue to refer to Figure 1. In one embodiment, in order to reduce the resistance of the heat exchange tube 13 to the heat exchange airflow without affecting the heat exchange capacity of the heat exchange tube 13, at least a part of the first tube section 131 is an elliptical tube, that is, the first tube section 131 The radial cross-sectional shape of at least part of the pipe section is an ellipse. The long axis of the ellipse is parallel to the first predetermined direction Y, and the short axis of the ellipse is perpendicular to the first predetermined direction Y, that is, the at least part of the first pipe section 131 is perpendicular to the first predetermined direction Y The small orthographic projection area on the plane of, means that the resistance of the at least part of the first pipe section 131 to the heat exchange airflow is small, which is beneficial to reducing the wind side pressure loss of the heat exchanger 1. If the long axis of the ellipse is perpendicular to the first predetermined direction Y, and the short axis of the ellipse is parallel to the first predetermined direction Y, the at least part of the first pipe section 131 is perpendicular to the first predetermined direction Y. The larger orthographic projection area on the plane of the direction Y means that the resistance of the at least part of the first tube section 131 to the heat exchange airflow is relatively large, and accordingly the wind side pressure loss of the heat exchanger 1 is relatively large.

Optionally, the ratio of the size of the major axis to the size of the minor axis of the ellipse, that is, the length to diameter ratio of the elliptical tube, is preferably 1.5:1 to 3:1, which can be based on the requirements for the heat exchange capacity of the heat exchanger 1 and The size of the heat exchange air duct where the heat exchanger 1 is located is adjusted accordingly, so that the size of the heat exchange tube 13 in the thickness direction X of the heat exchanger 1 is minimized on the premise that the heat exchanger 1 has sufficient heat exchange capacity, To reduce the thickness of the heat exchanger 1.

In addition, for at least two first tube sections 131 in the heat exchange tube 13, part of the first tube sections 131 may be elliptical tubes, and the remaining part of the first tube sections 131 may be round tubes. Specifically, the first side 11 and the second side 12 along the first preset direction Y respectively serve as the air inlet side and the air outlet side of the heat exchanger 1, where the heat exchange gas on the air inlet side contains higher moisture The heat exchange gas on the air outlet side causes the frosting of the part near the air inlet side of the heat exchanger 1 to be more severe than the frosting of the part near the air outlet side. Therefore, the part of the first pipe section 131 near the inlet side of the heat exchange tube 13 may be an elliptical tube to reduce the wind resistance to the heat exchange airflow, and the first pipe section 131 near the outlet side may be a round tube, which can also meet the requirements. . Of course, at least two of the first tube sections 131 in the heat exchange tube 13 may also be elliptical tubes to further reduce the wind resistance of the heat exchange tube 13 to the heat exchange airflow. As for the second tube section 132 in the heat exchange tube 13, it is the same as the first tube section 131, and it can be at least partially an elliptical tube, or the second tube section 132 is a round tube, which is not limited here. It is understandable that the second tube section 132 also adopts an elliptical tube, which is more conducive to reducing the wind resistance to the heat exchange air flow, and the first tube section 131 and the second tube section 132 are both elliptical tubes, so that the elliptical tube substrate is bent integrally , The heat exchange tube 13 arranged in a serpentine shape can be formed, which is beneficial to simplify the preparation process of the heat exchange tube 13.

Of course, in other embodiments of the present application, the heat exchange tubes 13 may also be round tubes, such as φ5 round tubes, etc., which are not limited herein. In addition, the heat exchange tube 13 may be designed with a medium (including refrigerant, etc.) inlet and a medium outlet. The medium passes into the heat exchange tube 13 through the medium inlet and is output through the medium outlet, such as reciprocating. The heat exchange tube 13 can also be designed with multiple media inlets and multiple media outlets, which are not limited here.

Please refer to FIG. 12, which is a schematic structural diagram of a tenth embodiment of a heat exchanger according to the present application.

In an embodiment, the at least two heat exchange fins 14 of the heat exchanger 1 further include second heat exchange fins 142, which are different from the first heat exchange fins 141 in that the second heat exchange fins 142 consist of The second base 1421 is formed, that is, the second heat exchange fin 142 is in the form of a flat sheet. Wherein, the second base 1421 is usually also arranged perpendicular to the heat exchange tube 13, which is the same as the first base described above, and aims to keep sufficient space between adjacent heat exchange fins 14 on the heat exchange tube 13 Distance to reduce the risk of frost blocking. In addition, the size of the second heat exchange fin 142 in the thickness direction X of the heat exchanger 1 is equal to the size of the first heat exchange fin 141 in the thickness direction X of the heat exchanger 1, that is, the first heat exchange fin 141 The second heat exchange fin 142 has the same size in the thickness direction X of the heat exchanger 1, which is beneficial to the ultra-thin design of the heat exchanger 1.

Further, the at least two heat exchange fins 14 of the heat exchanger 1 are divided into at least two heat exchange fin groups 143 along the first preset direction Y. The ratio of the number of first heat exchange fins 141 and second heat exchange fins 142 in the heat exchange fin group 143 close to the first side 11 is different from that of the first heat exchange fin group 143 in the heat exchange fin group 143 close to the second side 12. The number ratio of the one heat exchange fin 141 and the second heat exchange fin 142.

Please continue to refer to Figure 12. In an embodiment, the heat exchange fin 14 in the heat exchange fin group 143 near the first side 11 is one of the first heat exchange fin 141 and the second heat exchange fin 142, which can be understood as the other The number of heat exchange fins 14 is 0; and the heat exchange fins 14 in the heat exchange fin group 143 close to the second side 12 are the first heat exchange fins 141 and the second heat exchange fins 142 The other type can also be understood as the number of the other type of heat exchange fins 14 is zero. Of course, in other embodiments of the present application, the same heat exchange fin group 143 may simultaneously include the first heat exchange fin 141 and the second heat exchange fin 142, and the first heat exchange fins 142 are alternately arranged on the heat exchange tube 13. The heat fin 141 and the second heat exchange fin 142.

Please continue to refer to Figure 12. In one embodiment, the heat exchange fin 14 in the heat exchange fin group 143 close to the first side 11 is the first heat exchange fin 141, that is, the first heat exchange fin 14 in the heat exchange fin group 143 close to the first side 11 The ratio of the number of one heat exchange fin 141 to the second heat exchange fin 142 is N:0, where N is the number of the first heat exchange fin 141 in the heat exchange fin group 143 close to the first side 11; The heat exchange fins 14 in the heat exchange fin group 143 on the second side 12 are the second heat exchange fins 142, that is, the first heat exchange fins 141 and the first heat exchange fins 141 in the heat exchange fin group 143 close to the second side 12 The number ratio of the second heat exchange fins 142 is 0:M, where M is the number of the second heat exchange fins 142 in the heat exchange fin group 143 close to the second side 12.

Refer to Figure 13. In an alternative embodiment, the heat exchange fin 14 in the heat exchange fin group 143 close to the first side 11 is the second heat exchange fin 142, that is, the first heat exchange fin 14 in the heat exchange fin group 143 close to the first side 11 The number ratio of a heat exchange fin 141 to the second heat exchange fin 142 is 0:M, where M is the number of the second heat exchange fin 142 in the heat exchange fin group 143 close to the first side 11; The heat exchange fins 14 in the heat exchange fin group 143 on the second side 12 are the first heat exchange fins 141, that is, the first heat exchange fins 141 and the first heat exchange fins 141 in the heat exchange fin group 143 close to the second side 12 The number ratio of the second heat exchange fins 142 is N:0, where N is the number of the first heat exchange fins 141 in the heat exchange fin group 143 close to the second side 12.

FIGS. 12-13 show a situation where at least two heat exchange fins 14 of the heat exchanger 1 are divided into two heat exchange fin groups 143 along the first preset direction Y. The two heat exchange fin groups 143 are respectively a flat heat exchange fin group (including the second heat exchange fin 142) and a folded heat exchange fin group (including the first heat exchange fin 141). Of course, in other embodiments of the present application, the at least two heat exchange fins 14 of the heat exchanger 1 can also be divided into a plurality of heat exchange fin groups 143 along the first preset direction Y. The fin groups and the folded-sheet heat exchange fin groups are alternately arranged along the first preset direction Y.

Please refer to Figure 1, 14. In an embodiment, the at least two heat exchange fins 14 of the heat exchanger 1 are divided into at least two heat exchange fin groups 143 along the first predetermined direction Y. The first side 11 and the second side 12 along the first preset direction Y respectively serve as the air inlet side and the air outlet side of the heat exchanger 1, because the heat exchange gas on the air inlet side contains more moisture than the air outlet Therefore, the amount of frost on the part near the inlet side of the heat exchanger 1 is greater than the amount of frost on the part near the outlet side.

In view of this, when the at least two heat exchange fin groups 143 divided along the first preset direction Y of the at least two heat exchange fins 14 of the heat exchanger 1 are all composed of only the first heat exchange fins 141, The preset angle θ1 of the first heat exchange fin 141 in the heat exchange fin group 143 close to the first side 11 is greater than that of the first heat exchange fin 141 in the heat exchange fin group 143 close to the second side 12 The angle θ2 is set so that in the heat exchange fin group 143 close to the first side 11, the distance between the bent portions 1412 of the adjacent first heat exchange fins 141 is relatively large, so as to provide sufficient frost-containing space and reduce The risk of frost blocking occurs; and in the heat exchange fin group 143 close to the second side 12, because the moisture in the heat exchange gas has been greatly reduced by the partial condensation of the heat exchanger 1 on the inlet side, it is close to the first side. In the heat exchange fin groups 143 on the two sides 12, the distance between the bent portions 1412 of the adjacent first heat exchange fins 141 is allowed to be relatively small, and frost blocking is not easy to occur. Moreover, since the dimensions of the first heat exchange fins 141 of the two heat exchange fin groups 143 close to the first side 11 and the second side 12 in the thickness direction X of the heat exchanger 1 are usually designed to be equal, and because they are close to the first side The preset angle θ1 of the first heat exchange fin 141 in the heat exchange fin group 143 on one side 11 is greater than the preset angle of the first heat exchange fin 141 in the heat exchange fin group 143 close to the second side 12 θ2, therefore, the area of the bent portion 1412 of the first heat exchange fin 141 in the heat exchange fin group 143 close to the second side 12 is larger, and the heat exchange area provided by it is larger, which is beneficial to improve the heat exchanger 1 The heat transfer efficiency.

In the above embodiment where the at least two heat exchange fins 14 of the heat exchanger 1 are divided into at least two heat exchange fin groups 143 along the first preset direction Y, the heat exchange gas on the inlet side contains The moisture content is higher than the heat exchange gas on the air outlet side, so the amount of frost on the part near the air inlet side of the heat exchanger 1 is greater than the amount of frost on the part near the air outlet side.

Please continue to refer to Figure 1. In one embodiment, the distance between adjacent heat exchange fins 14 is greater than the distance between the adjacent heat exchange fins 14 sleeved on the same first pipe section 131 near the air inlet side. The distance between adjacent heat exchange fins 14. That is, the distance between the adjacent heat exchange fins 14 near the air inlet side is relatively large to provide sufficient frost-holding space and reduce the risk of frost blocking; while the moisture in the heat exchange gas on the air outlet side passes through The partial condensation of the heat exchanger 1 on the wind side has been greatly reduced, so the distance between the adjacent heat exchange fins 14 near the air outlet side can be relatively small to provide a larger heat exchange area and improve the heat exchanger 1 The heat transfer efficiency.

In one embodiment, in order to avoid excessive moisture in the heat exchange gas on the inlet side, excessive frost formation after condensation by the heat exchanger 1 causes blockage of the gas flow passage of the heat exchanger 1 The air inlet side of the heater 1 is provided with a pre-cooling pipe 15, and the pre-cooling pipe 15 is not sleeved with heat exchange fins 14, which can avoid frost blocking. The pre-cooling pipe 15 can condense the moisture in the heat exchange gas on the pre-cooling pipe 15 in advance, which can prevent the frost blocking of the heat exchange fins 14 on the heat exchanger 1.

Further, the pre-cooling tube 15 may be a part of the heat exchange tube 13. Specifically, the heat exchange fins 14 are not sleeved on the first pipe section 131 near the inlet side of the heat exchange tube 13, and the first pipe section 131 near the inlet side serves as the pre-cooling tube 15 and is near the outlet side. Heat exchange fins 14 are sleeved on the first pipe section 131 to provide sufficient heat exchange area and improve the heat exchange efficiency of the heat exchanger 1. However, in this embodiment, the heat exchange fins 14 on the first pipe section 131 near the air outlet side may be in the form described in the foregoing embodiment, and will not be repeated here.

In summary, the heat exchanger provided by the present application can reduce the thickness of the heat exchanger without affecting the heat exchange capacity of the heat exchanger by bending the heat exchange fins, thereby reducing the cost of the heat exchanger. The occupied space is conducive to the ultra-thin design of refrigerators and other electrical equipment using the heat exchanger, and the volume ratio of the refrigerators and other electrical equipment using the heat exchanger is increased by about 7.5%.

Please refer to FIGS. 15-16. FIG. 15 is a schematic structural diagram of an embodiment of the electrical equipment of the present application, and FIG. 16 is a schematic structural diagram of another embodiment of the electrical equipment of the present application.

In an embodiment, the electrical equipment 2 includes a heat exchanger 1. When the electrical equipment 2 is a household appliance used for refrigerating fresh food or other items such as a refrigerator, the heat exchanger 1 may be an evaporator in the refrigerator to maintain a low-temperature environment in the storage area inside the refrigerator. The heat exchanger 1 can be arranged on the back of the electrical equipment 2, as shown in FIG. 15. Since the thickness of the heat exchanger 1 provided in this embodiment is small, it is beneficial to the ultra-thin design of the electrical equipment 2 so that the thickness of the electrical equipment 2 can be easily adapted to the size of the home improvement cabinet, and an embedded home improvement design is realized.

Further, the internal space of the electrical equipment 2 is used for refrigerating and keeping fresh food or other items. The electrical equipment 2 also includes a sandwich partition 22 that divides its internal space into different storage areas 21, and the heat exchanger 1 is arranged in the sandwich partition.板22. FIG. 16 shows a situation in which the sandwich partition 22 is arranged in the vertical direction and divides the internal space of the electrical equipment 2 into different storage areas 21 in the horizontal direction. The heat exchanger 1 is arranged in the interlayer partition 22 to avoid the influence on the thickness of the electric device 2 caused by being arranged on the back of the electric device 2, so as to allow the thickness of the electric device 2 to be further reduced. Of course, the arrangement form of the interlayer partition 22 can also adopt other ways, such as arrangement in a horizontal direction, etc., which is not limited herein.

In addition, since the temperature of the heat exchanger 1 in electrical equipment 2 such as refrigerators is low, strict insulation is required. Thicker PU foam materials (polyurethane) can be used, or VIP (Vacuum Insulation) can be used. Panel, vacuum insulation board) and other materials play the role of heat insulation. In a traditional refrigerator, the thickness of the evaporator is about 60mm, and the thickness of the insulation material is about 100mm. With the evaporator installed on the back of the refrigerator, the thickness of the refrigerator is difficult to be less than 640mm. However, the electrical equipment 2 provided in this embodiment has a small thickness of the heat exchanger 1 inside, so that the thickness of the electrical equipment 2 itself is much smaller than that of a traditional refrigerator, and the heat exchanger 1 is provided in the interlayer partition plate 22 to replace it. The heat exchanger 1 provided on the back of the electrical equipment 2 can further reduce the thickness of the electrical equipment 2.

Of course, the electrical equipment 2 can also be other equipment that requires the heat exchanger 1 to exchange thermal energy, which is not limited here. Among them, the heat exchanger 1 is the heat exchanger described in the above-mentioned embodiment, which will not be repeated here.

In addition, in this application, unless expressly stipulated and limited otherwise, the terms "connected", "connected", "stacked" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection, or Integration; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication between two elements or the interaction between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the application, not to limit them; although the application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand: It is still possible to modify the technical solutions described in the foregoing embodiments, or equivalently replace some or all of the technical features; these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the application range.

Claims

A heat exchanger, wherein the heat exchanger has a first side and a second side that are spaced apart along a first preset direction and opposite to each other, and the heat exchanger includes:

The heat exchange tube includes at least two first tube sections and at least one second tube section, wherein the at least two first tube sections are spaced apart from each other along the first preset direction, and the second tube sections are connected Adjacent ends of the at least two first pipe sections, so that the heat exchange tubes are arranged in a serpentine shape;

At least two heat exchange fins, the at least two heat exchange fins are sleeved on the first tube section and are arranged at intervals along the extension direction of the first tube section, wherein the at least two heat exchange fins include A first heat exchange fin, the first heat exchange fin includes a first base portion and a bent portion connected, the first base portion is sleeved on the first pipe section and has a direction along the first preset direction An extended first side, and the bent portion is connected to the first base along the first side and is bent relative to the first base.
The heat exchanger according to claim 1, wherein the bent portion and the first base are respectively located on both sides of a reference plane passing the first side edge and perpendicular to the first base, and The bending portion is set at a predetermined angle between at least the cut surface of the end portion away from the first base portion and the reference surface, wherein the predetermined angle is 20°≤θ<90°.
The heat exchanger according to claim 2, wherein the bent portion is a planar structure, and the extension surface where the bent portion is located and the reference surface are arranged at the preset angle.
The heat exchanger according to claim 2, wherein the bent portion has a curved surface structure, and the pre-curved surface is formed between the cut surface of the end of the bent portion away from the first base and the reference surface. Set the angle setting.
The heat exchanger according to claim 2, wherein the bent portion includes at least two connected sub-bend portions, each of the sub-bend portions extends in a direction away from the reference surface, and each of the The sub-bending portion is arranged at the preset angle between at least the cut surface of the end portion away from the first base portion and the reference surface.
The heat exchanger according to claim 1, wherein the heat exchanger further comprises a heat exchange tube assembly, and the heat exchange tube assembly comprises at least two heat exchangers arranged opposite to each other and spaced apart along a second preset direction. For the heat pipe, the first base includes at least two sub-bases arranged at intervals along the second predetermined direction and sleeved on different first pipe sections.
The heat exchanger according to claim 6, wherein the adjacent sub-bases are connected by the bent portion.
The heat exchanger according to claim 1, wherein the first base has two opposite first sides, and each of the first sides of the first base is connected to a folding The bent portion, wherein the bent portions connected to each of the first side edges are located on the same side or different sides of the extension surface where the first base portion is located.
The heat exchanger according to claim 1, wherein the first base part and the bent part are connected by a curved surface transition.
The heat exchanger according to claim 1, wherein the at least two heat exchange fins further comprise second heat exchange fins, and the second heat exchange fins consist of only the second base.
The heat exchanger according to claim 10, wherein the at least two heat exchange fins are divided into at least two heat exchange fin groups along the first predetermined direction, and all of them near the first side The number ratio of the first heat exchange fins and the second heat exchange fins in the heat exchange fin group is different from that of the first heat exchange fins in the heat exchange fin group close to the second side. The number ratio of the heat exchange fins and the second heat exchange fins.
The heat exchanger according to claim 11, wherein the heat exchange fins in the heat exchange fin group close to the first side are the first heat exchange fin and the second heat exchange fin. One of the heat exchange fins, and the heat exchange fins in the heat exchange fin group close to the second side are the first heat exchange fins and the second heat exchange fins Of another.
The heat exchanger according to claim 10, wherein the first side and the second side serve as the air inlet side and the air outlet side of the heat exchanger, respectively;

Wherein, the distance between adjacent heat exchange fins sleeved on the same first pipe section close to the air inlet side is greater than that of the same first pipe section sleeved on the air outlet side The distance between the upper and adjacent heat exchange fins; or

The heat exchange fins are not sleeved on the first pipe section close to the air inlet side, and the heat exchange fins are sleeved on the first pipe section close to the air outlet side.
The heat exchanger according to claim 2, wherein the at least two heat exchange fins are divided into at least two heat exchange fin groups along the first predetermined direction, and all of them near the first side The predetermined angle of the first heat exchange fins in the heat exchange fin group is greater than that of the first heat exchange fins in the heat exchange fin group close to the second side Preset angle.
The heat exchanger according to claim 14, wherein the first side and the second side serve as the air inlet side and the air outlet side of the heat exchanger, respectively;

Wherein, the distance between adjacent heat exchange fins sleeved on the same first pipe section close to the air inlet side is greater than that of the same first pipe section sleeved on the air outlet side The distance between the upper and adjacent heat exchange fins; or

The heat exchange fins are not sleeved on the first pipe section close to the air inlet side, and the heat exchange fins are sleeved on the first pipe section close to the air outlet side.
The heat exchanger according to claim 1, wherein at least a part of the pipe section of the first pipe section is an elliptical pipe; or the first side and the second side respectively serve as the air inlet side and the second side of the heat exchanger On the air outlet side, at least a part of the at least two first pipe sections close to the air inlet side is an elliptical pipe.
The heat exchanger according to claim 16, wherein the radial cross section of the elliptical tube is an ellipse, the major axis of the ellipse is parallel to the first predetermined direction, and the minor axis of the ellipse Perpendicular to the first preset direction.
The heat exchanger according to claim 17, wherein the ratio of the major axis size to the minor axis size of the ellipse is 1.5:1 to 3:1.
An electrical equipment, wherein the electrical equipment includes a heat exchanger, the heat exchanger having a first side and a second side that are spaced apart and opposed along a first preset direction, and the heat exchanger includes:

The heat exchange tube includes at least two first tube sections and at least one second tube section, wherein the at least two first tube sections are spaced apart from each other along the first preset direction, and the second tube sections are connected Adjacent ends of the at least two first pipe sections, so that the heat exchange tubes are arranged in a serpentine shape;

At least two heat exchange fins, the at least two heat exchange fins are sleeved on the first tube section and are arranged at intervals along the extension direction of the first tube section, wherein the at least two heat exchange fins include A first heat exchange fin, the first heat exchange fin includes a first base portion and a bent portion connected, the first base portion is sleeved on the first pipe section and has a direction along the first preset direction An extended first side, and the bent portion is connected to the first base along the first side and is bent relative to the first base.
The electrical equipment according to claim 19, wherein the electrical equipment is a refrigerator, the refrigerator includes a sandwich partition that divides its internal space into different storage areas, and the heat exchanger is disposed on the sandwich partition. Inside the board.