Defrosting heater and refrigeration equipment

Abstract

The defrosting heater comprises a heating piece and a plurality of heat conduction pieces, the heating piece comprises a plurality of transverse sections which are connected with one another, the transverse sections are arranged in the horizontal direction, the transverse sections are arranged at intervals in the vertical direction, each heat conduction piece is connected with the transverse sections, the heat dissipation area can be increased through the heat conduction pieces, and the heat dissipation efficiency is improved. The defrosting effect is enhanced, the defrosting time is shortened, heat is rapidly conducted out, the heat conduction pieces are arranged in the vertical direction, airflow can flow along the surfaces of the heat conduction pieces, the multiple heat conduction pieces are arranged at intervals in the horizontal direction, gaps are formed between the multiple heat conduction pieces, the airflow flowing resistance can be reduced, and the influence on the air cooling effect is relieved.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration equipment, in particular to a defrosting heater and refrigeration equipment. Background Art

[0002] At present, in air-cooled refrigerators, a defrost heater is generally used to defrost the evaporator. In the related art, the defrost heater is arranged near the evaporator. After the defrost heater is powered on, it can generate heat and transfer the heat to the evaporator by natural convection and heat radiation. Since the air-cooled refrigerator uses air cooling, that is, the cold air from the evaporator is sent to the refrigeration room by a fan, in order to reduce the resistance to the air flow and ensure the air cooling effect, the volume of the defrost heater is required to be smaller, but it also leads to a smaller surface area of ​​the defrost heater and weaker heat dissipation capacity, resulting in poor defrosting effect, requiring a long time for defrosting, and then causing large temperature fluctuations in the refrigeration room. In addition, due to the slow heat dissipation speed, the temperature at the defrost heater is high, which is also easy to burn the inner tank. Utility Model Content

[0003] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a defrost heater, which can quickly conduct the heat of the defrost heater, improve the defrost effect, shorten the defrost time and reduce the impact on the air cooling effect.

[0004] The utility model also provides refrigeration equipment with the defrosting heater.

[0005] The defrost heater according to the first embodiment of the utility model includes: a heating element, including a plurality of mutually connected transverse sections, the transverse sections are arranged in a horizontal direction, and the plurality of transverse sections are arranged at intervals in a vertical direction; a plurality of heat-conducting elements, each of the heat-conducting elements is connected to the plurality of transverse sections, the heat-conducting elements are arranged in a vertical direction, and the plurality of heat-conducting elements are arranged at intervals in a horizontal direction.

[0006] The defrost heater according to the embodiment of the first aspect of the utility model has at least the following beneficial effects: during defrosting, the heating element generates heat, and since the heat-conducting element is connected to the heating element, the heat of the heating element can be conducted to the heat-conducting element. Since there are multiple heat-conducting elements, the heat dissipation area can be increased, so that the heat of the heat-conducting element can be quickly dissipated, the defrosting effect is enhanced, the defrosting time is shortened, and the impact on the temperature of the refrigeration compartment is reduced. Moreover, each heat-conducting element is connected to multiple transverse sections of the heating element, which can enhance the heat-conducting effect, so that the heat of the heating element is quickly conducted to the heat-conducting element, and heat accumulation is avoided, and the inner tank is not easily burned. In addition, multiple heat-conducting elements are connected to multiple transverse sections, which can also enhance the fixing effect of the heating element. During cooling, since the heat-conducting element is arranged in a vertical direction, the airflow can flow along the surface of the heat-conducting element, and the resistance to the airflow is small. Moreover, since multiple heat-conducting elements are arranged at intervals, the airflow can also pass through the gap between two adjacent heat-conducting elements, so that the airflow flows more smoothly, ensuring a better air-cooling effect.

[0007] According to some embodiments of the utility model, the heating element includes a first layer structure and a second layer structure connected to each other, the first layer structure and the second layer structure each include a plurality of the transverse sections, the first layer structure is located on the front side of the heating element, the second layer structure is located on the rear side of the heating element, the front and rear sides of the first layer structure are both connected to a plurality of the heat-conducting elements, and the front and rear sides of the second layer structure are both connected to a plurality of the heat-conducting elements.

[0008] According to some embodiments of the utility model, along the arrangement direction of the plurality of heat-conducting components, the heat-generating components are divided into a first area, a second area, and a third area which are connected in sequence, the distance between two adjacent heat-conducting components in the first area is a first distance, the distance between two adjacent heat-conducting components in the second area is a second distance, the distance between two adjacent heat-conducting components in the third area is a third distance, and the first distance and the third distance are both greater than the second distance.

[0009] According to some embodiments of the present invention, the distance between two adjacent heat conducting members is 4 to 10 mm.

[0010] According to some embodiments of the present invention, the cross-sections of the heat conducting element and the heat generating element are circular, and the ratio of the outer diameter of the heat conducting element to the outer diameter of the heat generating element is greater than or equal to 1 / 4 and less than or equal to 1 / 2.

[0011] According to some embodiments of the present invention, a surface of the heat conducting element is provided with a varnish layer for corrosion protection.

[0012] According to some embodiments of the present invention, the heat conducting element and the heat generating element are connected by welding.

[0013] According to the refrigeration device of the embodiment of the second aspect of the utility model, it includes: a box body, which is provided with an air duct, one end of the air duct is provided with an air inlet, and the other end of the air duct is provided with an air outlet; an evaporator is arranged in the air duct; the defrost heater of the embodiment of the first aspect is arranged in the air duct, and the defrost heater is located below the evaporator.

[0014] The refrigeration device according to the second embodiment of the utility model comprises the defrost heater of the first embodiment and thus has at least the above-mentioned beneficial effects, which will not be described in detail here.

[0015] According to some embodiments of the utility model, the refrigeration equipment includes an air duct switching mechanism, the air duct switching mechanism includes a deformable part, the deformable part is arranged in the air duct, the deformable part is located above the evaporator, the deformable part has an expanded state and a folded state, when the deformable part is heated, the deformable part is in the expanded state to block the air duct, when the deformable part is cooled, the deformable part is in the folded state to open the air duct.

[0016] According to some embodiments of the utility model, the box body includes an inner liner and a cover plate, the air duct is defined between the inner liner and the cover plate, a bracket is provided in the air duct, the bracket is connected to the inner liner, and the deformable member is connected to the bracket.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0019] Figure 1 It is a front view of the defrost heater of some embodiments of the utility model;

[0020] Figure 2 It is a front view of the defrost heater of some embodiments of the utility model;

[0021] Figure 3 A bottom view of a defrost heater according to some embodiments of the present utility model;

[0022] Figure 4 It is a side view of a defrost heater according to some embodiments of the utility model;

[0023] Figure 5 It is a structural schematic diagram of a defrost heater in some embodiments of the utility model;

[0024] Figure 6It is a structural schematic diagram of a heating element of a defrost heater in some embodiments of the utility model;

[0025] Figure 7 A defrosting principle diagram of a refrigeration device according to some embodiments of the utility model;

[0026] Figure 8 A defrosting principle diagram of a refrigeration device according to some embodiments of the utility model;

[0027] Fig. 9 This is a schematic structural diagram of a deformable member and a bracket of a refrigeration device in some embodiments of the utility model.

[0028] Reference numerals:

[0029] The defrosting heater 100, the heating element 110, the transverse section 111, the bending section 112, the first layer structure 113, the second layer structure 114, the first area 115, the second area 116, the third area 117, and the heat conducting element 120;

[0030] Air duct 200, air inlet 210, air outlet 220, bracket 230, liner 240, cover plate 250;

[0031] Evaporator 300;

[0032] Air duct switch mechanism 400 and deformation member 410 . DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0034] Reference Figure 1As shown, the defrost heater 100 of the first embodiment of the utility model comprises a heating element 110 and a plurality of heat-conducting elements 120, the plurality of heat-conducting elements 120 are all connected to the heating element 110, the heat-conducting elements 120 extend in the vertical direction, and the plurality of heat-conducting elements 120 are arranged at intervals in the left-right direction. During defrosting, the heating element 110 is powered on to generate heat. Since the heat-conducting element 120 is connected to the heating element 110, the heat of the heating element 110 can be transferred to the heat-conducting element 120. Since there are a plurality of heat-conducting elements 120, the heat dissipation area can be increased, so that the heat of the heat-conducting element 120 can be quickly dissipated, the defrosting effect can be enhanced, the defrosting time can be shortened, the influence on the temperature of the refrigeration compartment can be reduced, and the inner tank 240 is not easily burned. During cooling, since the heat conductive member 120 extends in the vertical direction, the space occupied by the heat conductive member 120 is small, and the airflow flows from bottom to top. The airflow can flow along the surface of the heat conductive member 120, and the resistance to the airflow is small. In addition, multiple heat conductive members 120 are arranged at intervals, and the airflow can also pass through the gap between two adjacent heat conductive members 120, so that the airflow flows more smoothly, ensuring a better air cooling effect.

[0035] It should be noted that, for the above-mentioned embodiment, it can also be understood that the heat conductor 120 extends in the vertical direction, so that the surface area of ​​the heat conductor 120 is larger, and at the same time the projection area of ​​the heat conductor 120 in the vertical direction is smaller. The larger the surface area of ​​the heat conductor 120, that is, the larger the heat dissipation area of ​​the heat conductor 120, the better the heat dissipation effect on the heating element 110, and the defrosting effect can be enhanced. The smaller the projection area of ​​the heat conductor 120 in the vertical direction, the smaller the resistance to airflow.

[0036] It is understandable that, referring to Figure 1As shown, in some embodiments, the heating element 110 is a tubular structure, the heating element 110 can be a single-layer structure, the heating element 110 is bent and arranged to form multiple transverse sections 111, and the multiple transverse sections 111 are connected to each other. Specifically, the heating element 110 is formed by bending a single electric heating tube, and two adjacent transverse sections 111 are connected by a bending section 112, the bending section 112 is arc-shaped, and the bending section 112 is provided with multiple sections, and the multiple bending sections 112 are connected to the multiple transverse sections 111, and the transverse sections 111 are arranged in the left and right directions, and the multiple transverse sections 111 are arranged at intervals in the vertical direction, and the heat conducting element 120 is connected to the multiple transverse sections 111. It should be noted that the multiple transverse sections 111 are arranged to overlap as much as possible in the vertical direction, so that the projection area of ​​the multiple transverse sections 111 in the vertical direction is smaller, and the resistance to the airflow is smaller. At the same time, the number of transverse sections 111 can be increased as much as possible, and the heat dissipation area of ​​the heating element 110 can be increased, which can enhance the defrosting effect. Moreover, a single heat-conducting member 120 is connected to multiple transverse sections 111, thereby increasing the contact area between the heat-conducting member 120 and the heating element 110. The heat-conducting member 120 can simultaneously conduct the heat from the multiple transverse sections 111, thereby improving the heat dissipation efficiency and further enhancing the defrosting effect. In addition, the heat-conducting member 120 is connected to multiple transverse sections 111, thereby enhancing the connection stability between the heat-conducting member 120 and the heating element 110, thereby preventing the heat-conducting member 120 from falling off easily, and thereby improving the fixing effect on the heating element 110.

[0037] It should be noted that, for the above-mentioned embodiment, it can also be understood that the heat conductive member 120 extends a certain length in the vertical direction, so that the heat conductive member 120 can cover the lower end of the heating element 110 and the upper end of the heating element 110, thereby increasing the contact area between the heat conductive member 120 and the heating element 110 and improving the heat conduction effect.

[0038] It is understandable that, referring to Figure 3 and Figure 4 As shown, in some embodiments, the heating element 110 is a double-layer structure. Specifically, the heating element 110 includes a first layer structure 113 and a second layer structure 114 that are interconnected. The first layer structure 113 is located on the front side of the heating element 110, and the second layer structure 114 is located on the rear side of the heating element 110. By setting up a double-layer structure, the heat dissipation area of ​​the heating element 110 can be increased, and the space occupied by the double-layer structure is also small. It can also be understood that the first layer structure 113 and the second layer structure 114 are formed by a plurality of the above-mentioned transverse sections 111 and bending sections 112, or the first layer structure 113 and the second layer structure 114 are formed by bending a single electric heating tube, and there is a certain distance between the first layer structure 113 and the second layer structure 114 to allow airflow to pass through. The front and rear sides of the first layer structure 113 are connected to a plurality of heat-conducting members 120, and the front and rear sides of the second layer structure 114 are also connected to a plurality of heat-conducting members 120. Further, referring to Figure 3As shown, the heat conducting members 120 can be divided into four groups, and the multiple heat conducting members 120 in each group are arranged at intervals along the left-right direction. The first group of heat conducting members 120 is connected to the front side of the first layer structure 113, and the second group of heat conducting members 120 is connected to the rear side of the first layer structure 113, which can fully dissipate the heat of the first layer structure 113 and occupy a small space. The third group of heat conducting members 120 is connected to the front side of the second layer structure 114, and the fourth group of heat conducting members 120 is connected to the rear side of the second layer structure 114, which can fully dissipate the heat of the second layer structure 114 and occupy a small space. The second group of heat conducting members 120 and the third group of heat conducting members 120 are located between the first layer structure 113 and the second layer structure 114.

[0039] It can be understood that in this embodiment, the heat conductive element 120 is located at the front and rear sides of the heating element 110. The front and rear sides of the heating element 110 are generally opposite to the inner tank 240. The heat radiation of the heating element 110 directly acts on the inner tank 240. The heat conductive element 120 is set at this position. The heat conductive element 120 can absorb the heat radiation of the heating element 110 and quickly conduct it upwards to avoid heat accumulation, which can further avoid burning the inner tank 240.

[0040] It can be understood that in some embodiments, the heating element 110 and the heat conductive element 120 are both made of metal materials with good heat dissipation performance. The heating element 110 and the heat conductive element 120 are connected by welding, which can be easily assembled. The heating element 110 is directly connected to the heat conductive element 120 as a whole.

[0041] It is understandable that, in some embodiments, the heat conducting member 120 is subjected to surface varnish treatment by electrophoretic coating, and a varnish layer is formed on the surface of the heat conducting member 120, which can enhance corrosion resistance and prevent rust.

[0042] It can be understood that, in some embodiments, along the arrangement direction of the multiple heat conductive members 120, the multiple heat conductive members 120 can be arranged at equal intervals, that is, the distance between every two adjacent heat conductive members 120 is equal, or, along the arrangement direction of the multiple heat conductive members 120, the distance between two adjacent heat conductive members 120 varies.

[0043] Specifically, refer to Figure 2As shown, along the arrangement direction of the plurality of heat-conducting members 120, the heating element 110 is divided into a first area 115, a second area 116 and a third area 117 which are connected in sequence, the distance between two adjacent heat-conducting members 120 in the first area 115 is a first distance, the distance between two adjacent heat-conducting members 120 in the second area 116 is a second distance, the distance between two adjacent heat-conducting members 120 in the third area 117 is a third distance, and the first distance and the third distance are both greater than the second distance. It can also be understood that the distance between the two heat-conducting members 120 at the middle position of the heating element 110 is smaller, and the distance between the two heat-conducting members 120 at the edge position is smaller, forming an arrangement condition where the middle is dense and the sides are sparse. It can also be understood that the number of heat-conducting members 120 at the middle position of the heating element 110 is larger, and the number of heat-conducting members 120 at the edge position of the heating element 110 is smaller. It should be noted that, since the heat of the heating element 110 is concentrated in the middle position, more heat-conducting elements 120 are arranged in the middle position, that is, the heat dissipation area arranged in the middle position is larger, and more heat can be conducted out. The heat at the edge position of the heating element 110 is more dispersed, and fewer heat-conducting elements 120 are arranged at the edge position, which can reduce the resistance to the airflow and facilitate the flow of airflow. In addition, it should be noted that since there are fewer obstacles at the edge position, most of the airflow will flow at the edge position during cooling, and it is more reasonable to arrange fewer heat-conducting elements 120 at the edge position.

[0044] It can be understood that, in some embodiments, the distance between two adjacent heat conducting members 120 is 4 to 10 mm, which is relatively reasonable and can take into account both the heat dissipation effect and the air cooling effect.

[0045] It can be understood that, in some embodiments, the heating element 110 and the heat conductive element 120 are both tubular structures, the heat conductive element 120 is a solid structure, the cross-sections of the heating element 110 and the heat conductive element 120 are both circular, the diameter of the heat conductive element 120 is smaller than the diameter of the heating element 110, so as to reduce the occupied space, and the ratio of the diameter of the heat conductive element 120 to the diameter of the heating element 110 is greater than or equal to 1 / 4 and less than or equal to 1 / 2, so that the projection area of ​​the heat conductive element 120 in the vertical direction is smaller, which can reduce the resistance to the airflow, and at the same time, make the heat dissipation area of ​​the heat conductive element 120 larger.

[0046] It can be understood that, in some embodiments, the cross-section of the heat conducting member 120 can be circular, square, triangular or elliptical.

[0047] It can be understood that, in some embodiments, the heat conductor 120 can be a metal wire tube, and it can also be understood that the heat conductor 120 is a hollow structure, and a channel is formed inside the heat conductor 120, so that the cross-section of the heat conductor 120 is a circular ring shape, which can reduce the gravity of the heat conductor 120 and is relatively light. At the same time, the heat conductor 120 has an outer wall and an inner wall, which further increases the heat dissipation area compared to a solid structure, and the airflow can pass through the inside of the heat conductor 120, further reducing the resistance of the heat conductor 120 to the airflow, thereby ensuring a better air cooling effect during refrigeration.

[0048] The refrigeration device of the second aspect of the utility model comprises a box, an evaporator 300 and a defrosting heater 100, Figure 7 As shown, the box body is provided with an air duct 200, one end of the air duct 200 is provided with an air inlet 210, and the other end of the air duct 200 is provided with an air outlet 220. The air duct 200 can extend in the up-down direction, the air inlet 210 can be arranged at the lower end of the air duct 200, and the air outlet 220 can be arranged at the upper end of the air duct 200. The evaporator 300 and the defrost heater 100 are both arranged in the air duct 200, and the defrost heater 100 is located below the evaporator 300. When cooling, the fan is started, the air flow flows from bottom to top, and the temperature of the air flow drops when passing through the evaporator 300. Finally, the low-temperature air flow enters the refrigeration compartment from the air outlet 220 to achieve a circulating flow. When defrosting, the fan stops, and the defrost heater 100 transfers heat to the evaporator 300 in the form of natural convection and heat radiation, so that the frost on the evaporator 300 melts.

[0049] It can be understood that, in some embodiments, the refrigeration equipment includes an air duct switching mechanism 300, which is mainly used to close or open the air duct 200. The air duct switching mechanism 300 includes a deformable member 410, which is arranged in the air duct 200. The deformable member 410 is located above the evaporator 300. When the deformable member 410 is heated or cooled, the deformable member 410 can produce a certain deformation. Specifically, the deformable member 410 has an expanded state and a retracted state. The heat emitted by the defrost heater 100 can be conducted to the deformable member 410. When the deformable member 410 is heated, the deformable member 410 gradually expands, so that the deformable member 410 is in an expanded state, thereby blocking the air duct 200. When the deformable member 410 is cooled, the deformable member 410 gradually retracts, and the deformable member 410 is in a retracted state, thereby opening the air duct 200. Specifically, during defrosting, the heating element 110 generates heat, and the heat of the heating element 110 is transferred to the evaporator 300 , so that the airflow in the air duct 200 rises, and the high-temperature airflow rises and passes through the deformation element 410 .

[0050] It should be noted that, for the above embodiment, it can also be understood that when the deformable member 410 is switched from the folded state to the unfolded state, the area of ​​the projection of the deformable member 410 in the vertical direction increases, thereby blocking the air duct 200 and preventing the airflow in the air duct 200 from flowing out from the air outlet 220. The high-temperature airflow in the air duct 200 is not easy to enter the refrigeration room, thereby reducing the impact on the refrigeration room. When the deformable member 410 is switched from the unfolded state to the folded state, the area of ​​the projection of the deformable member 410 in the vertical direction decreases, which can reduce the area blocking the airflow and make the airflow flow smoothly.

[0051] It is understandable that, referring to Figure 7 As shown, in some embodiments, the box body includes an inner liner 240 and a cover plate 250. The cover plate 250 is vertically arranged. The above-mentioned air duct 200 is defined between the inner liner 240 and the cover plate 250. The cover plate 250 is located on the rear side of the inner liner 240 to reduce the occupied space.

[0052] It can be understood that a bracket 230 is provided in the air duct 200, the bracket 230 is connected to the inner liner 240, and the deformable member 410 is connected to the bracket 230. The bracket 230 mainly plays a supporting and connecting role and can support the deformable member 410. Since the bracket 230 is connected to the inner liner 240, the bracket 230 and the deformable member 410 can be installed first, and then the cover plate 250 can be installed. The assembly is more convenient, and the cover plate 250 will not hinder the installation of the bracket 230 and the deformable member 410.

[0053] It is understandable that, referring to Figure 7 As shown, the bottom of the deformable member 410 is connected to the top of the bracket 230. When the deformable member 410 is in a folded state, the two ends of the deformable member 410 are set downward. Specifically, the deformable member 410 is bent into a roughly N shape. During cooling, the airflow in the air duct 200 can flow upward along the surface of the deformable member 410 with less resistance, thereby ensuring smoother airflow and a cooling effect.

[0054] It is understandable that in some embodiments, the bracket 230 is made of metal material, the deformable member 410 is made of shape memory alloy material, the deformable member 410 can be deformed repeatedly, the bracket 230 and the deformable member 410 are connected by welding, the bracket 230 and the deformable member 410 are directly connected as one, and only the steps of installing the bracket 230 need to be performed, which is more convenient during installation. Alternatively, the bracket 230 and the deformable member 410 can also be connected by snap-fitting.

[0055] It is understandable that, referring to Fig. 9As shown, in some embodiments, the bracket 230 is a rod-shaped structure, and the bracket 230 extends in the horizontal direction. Specifically, the cross section of the bracket 230 is circular, the bracket 230 is a tubular structure, the deformable member 410 is a sheet-like structure, and the thickness is small, which reduces the resistance to the airflow. The deformable member 410 extends along the length direction of the bracket 230, and the bottom of the deformable member 410 is connected to the top of the bracket 230. When the deformable member 410 is in a retracted state, the two ends of the deformable member 410 are bent downward, and part of the bottom end surface of the deformable member 410 is in contact with the outer peripheral surface of the bracket 230. When cooling, the airflow in the air duct 200 can flow along the surface of the deformable member 410, and the resistance is small, which can ensure smooth airflow and ensure the air cooling effect. The bracket 230 is detachably connected to the inner liner 240. For example, a mounting groove can be set on the inner liner 240, and a mounting portion can be set on the bracket 230. The mounting portion cooperates with the mounting groove, and the assembly operation is more convenient. It can also be understood that the two ends of the bracket 230 are respectively mounted on the side walls of the inner liner 240, and the bracket 230 is suspended in the air duct 200, which can reduce the occupied space.

[0056] It is understandable that the shape memory alloy material can completely eliminate the deformation that occurs at a lower temperature after heating and restore its original shape before deformation. In this embodiment, the deformation member 410 is made of a shape memory alloy material with a two-way memory effect. In a natural state, the deformation member 410 is first bent into a U shape or a V shape, and then the deformation member 410 is installed. After the deformation member 410 is heated, it will return to the original unbent state. After the deformation member 410 cools, it will be bent again. The deformation member 410 can be deformed repeatedly, which is relatively stable and durable. In addition, the deformation member 410 is a sheet structure, which is easier to bend and convenient to manufacture.

[0057] Specifically, the shape memory alloy material can be nickel-titanium alloy, titanium-nickel-copper alloy, titanium-nickel-iron alloy, titanium-nickel-chromium alloy, copper-nickel alloy, copper-aluminum alloy, copper-zinc alloy, iron alloy, etc.

[0058] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, inside, outside, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0059] In the description of the utility model, if there is a description of first or second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0060] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0061] The embodiments of the utility model are described in detail above in conjunction with the accompanying drawings. Finally, it should be explained that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model is described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A defrost heater, characterized in that: include: The heating element comprises a plurality of mutually connected transverse sections, wherein the transverse sections are arranged in a horizontal direction and the plurality of transverse sections are arranged at intervals in a vertical direction; A plurality of heat-conducting parts, each of which is connected to a plurality of the transverse sections, the heat-conducting parts are arranged in a vertical direction, and a plurality of the heat-conducting parts are arranged at intervals in a horizontal direction, the heating element comprises a first layer structure and a second layer structure which are connected to each other, the first layer structure and the second layer structure both comprise a plurality of the transverse sections, the first layer structure is located on the front side of the heating element, the second layer structure is located on the rear side of the heating element, the front and rear sides of the first layer structure are both connected to a plurality of the heat-conducting parts, and the front and rear sides of the second layer structure are both connected to a plurality of the heat-conducting parts.

2. The defrost heater according to claim 1, characterized in that: Along the arrangement direction of the multiple heat-conducting parts, the heat-generating parts are divided into a first area, a second area, and a third area which are connected in sequence. The distance between two adjacent heat-conducting parts in the first area is a first distance. The distance between two adjacent heat-conducting parts in the second area is a second distance. The distance between two adjacent heat-conducting parts in the third area is a third distance. Both the first distance and the third distance are greater than the second distance.

3. The defrost heater according to claim 1, characterized in that: The distance between two adjacent heat conducting members is 4 to 10 mm.

4. The defrost heater according to claim 1, characterized in that: The cross-sections of the heat-conducting element and the heat-generating element are circular, and the ratio of the outer diameter of the heat-conducting element to the outer diameter of the heat-generating element is greater than or equal to 1 / 4 and less than or equal to 1 / 2.

5. The defrost heater according to claim 1, characterized in that: The surface of the heat conducting element is provided with a varnish layer for corrosion prevention.

6. The defrost heater according to claim 1, characterized in that: The heat conducting element is connected to the heat generating element by welding.

7. Refrigeration equipment, characterized in that include: The box body is provided with an air duct, one end of the air duct is provided with an air inlet, and the other end of the air duct is provided with an air outlet; an evaporator, disposed in the air duct; The defrost heater according to any one of claims 1 to 6 is arranged in the air duct, and the defrost heater is located below the evaporator.

8. The refrigeration device according to claim 7, characterized in that: The refrigeration equipment includes an air duct switching mechanism, which includes a deformable member. The deformable member is arranged in the air duct, and the deformable member is located above the evaporator. The deformable member has an expanded state and a retracted state. When the deformable member is heated, the deformable member is in the expanded state to block the air duct. When the deformable member is cooled, the deformable member is in the retracted state to open the air duct.

9. The refrigeration device according to claim 8, characterized in that: The box body includes an inner liner and a cover plate, the air duct is defined between the inner liner and the cover plate, a bracket is arranged in the air duct, the bracket is connected to the inner liner, and the deformable member is connected to the bracket.

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