Refrigerator

Abstract

The utility model relates to refrigeration equipment technical field provides a refrigerator, including cold storage room, freezer, cold storage return air pipe and heat conduction structure, freezer is equipped with freezing air duct and is located freezing air duct inside's freezing evaporimeter and defrosting heater, and defrosting heater is located freezing evaporimeter's one side, cold storage return air pipe has cold storage air inlet and cold storage air outlet, and cold storage air inlet is connected with cold storage room, and cold storage air outlet is connected with freezing air duct, and cold storage return air pipe is located freezing evaporimeter's one side, and cold storage air outlet extends to the position corresponding defrosting heater, and one end of heat conduction structure is connected with defrosting heater, and the other end is extended to cold storage return air pipe in cold storage air outlet, utilizes heat conduction structure to carry defrosting heater's heat conduction to cold storage return air pipe, thereby carries out defrosting and deicing to cold storage return air pipe inside.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration equipment technology, and in particular to a refrigerator. Background Technology

[0002] In the continuous development of refrigerator technology, its refrigeration system, as the core system ensuring the normal operation of the refrigerator, is usually composed of key components such as the freezer evaporator, compressor, and condenser. Among them, the freezer evaporator is one of the core components, and its main function is to maintain the low temperature environment inside the refrigerator to ensure that food is properly preserved. The internal air circulation structure design of the refrigerator plays a crucial role in the cooling effect. In a common air circulation layout, the refrigerated return air duct extends from the refrigerator compartment to the bottom of the evaporator in the freezer compartment to form a complete air circulation path.

[0003] However, this design reveals a critical problem in actual operation: when air enters the return air duct from the refrigerator compartment, it rapidly cools and condenses at the freezer compartment inlet, gradually forming frost on the inner wall of the return air duct. Over time, the frost accumulates, eventually causing blockage. Once the return air duct is blocked, the refrigerator's air circulation system cannot function properly, affecting its cooling performance and potentially causing malfunctions, severely impacting the refrigerator's normal operation and lifespan.

[0004] Therefore, how to solve the problem of frost easily forming inside the refrigeration return air duct in refrigerators has become a key issue that urgently needs to be addressed in the current refrigerator technology field. Utility Model Content

[0005] This invention aims to solve at least one of the technical problems existing in the related art. To this end, this invention proposes a refrigerator that can prevent frost from forming inside the refrigeration return air duct.

[0006] The refrigerator according to an embodiment of the present utility model includes:

[0007] Refrigeration compartment;

[0008] The freezer compartment is equipped with a freezer air duct and a freezer evaporator and a defrost heater located within the freezer air duct, with the defrost heater located on one side of the freezer evaporator;

[0009] The refrigerated return air duct has a refrigerated air inlet and a refrigerated air outlet. The refrigerated air inlet is connected to the refrigerated compartment, and the refrigerated air outlet is connected to the refrigeration air duct. The refrigerated return air duct is located on one side of the refrigeration evaporator, and the refrigerated air outlet extends to the position corresponding to the defrost heater.

[0010] The heat-conducting structure has one end connected to the defrosting heater and the other end extending through the refrigeration air outlet into the refrigeration return air duct.

[0011] According to the refrigerator of this utility model embodiment, by connecting a heat-conducting structure to the defrost heater and extending one end of the heat-conducting structure into the refrigerator return air duct, the heat of the defrost heater can be conducted to the refrigerator return air duct by the heat-conducting structure without changing the existing structure of the defrost heater, thereby defrosting the inside of the refrigerator return air duct. This can effectively solve the problem of frost formation inside the refrigerator return air duct and improve the anti-freezing capability inside the refrigerator return air duct.

[0012] According to one embodiment of the present invention, the portion of the heat-conducting structure located inside the refrigerated return air duct extends along the length of the refrigerated return air duct, and there is a gap between the peripheral wall of the heat-conducting structure and the inner wall of the refrigerated return air duct.

[0013] According to one embodiment of the present invention, the heat-conducting structure includes a heat-conducting body and a buckle, the buckle being located at one end of the heat-conducting body near the defrosting heater and engaging with the defrosting heater.

[0014] According to one embodiment of the present invention, the defrosting heater includes a heating wire, and the buckle is a slot structure adapted to the heating wire, wherein the buckle is interference-fitted with the heating wire.

[0015] According to one embodiment of the present invention, the heat-conducting body and the buckle are integrally formed.

[0016] According to one embodiment of the present invention, a retainer is provided on the inner wall of the refrigerated return air duct, and the portion of the heat-conducting structure located inside the refrigerated return air duct is fixed to the retainer.

[0017] According to one embodiment of the present invention, the end of the heat-conducting structure away from the defrosting heater is provided with a snap-fit ​​protrusion, and the fixture is provided with a snap-fit ​​groove. The snap-fit ​​protrusion snaps into the snap-fit ​​groove to fix the heat-conducting structure on the fixture.

[0018] According to one embodiment of the present invention, the heat-conducting structure and the defrosting heater are an integral structure. The portion of the heat-conducting structure located inside the refrigeration return air duct is fixed in the refrigeration return air duct by a snap-fit ​​assembly. The snap-fit ​​assembly includes a snap-fit ​​seat and snap-fit ​​members. The snap-fit ​​seat is a hollow shell. The two ends of the snap-fit ​​members are respectively connected to the two opposite side walls of the snap-fit ​​seat. Each pair of snap-fit ​​members is arranged parallel to each other. Each pair of snap-fit ​​members has a slot on the opposite side that is adapted to the heat-conducting structure. The heat-conducting structure is sandwiched in at least one pair of snap-fit ​​members and snapped into the slot.

[0019] According to one embodiment of the present invention, the refrigeration air duct is further provided with a fan and an insulation layer. The fan is located on the side of the refrigeration evaporator near the refrigerator compartment, and the insulation layer is located on the outer wall of the refrigerator return air duct.

[0020] According to one embodiment of the present invention, the length of the heat-conducting structure accounts for 2 / 7 to 3 / 7 of the length of the refrigerated return air duct.

[0021] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of the freezer air duct of a refrigerator according to one embodiment of the present invention;

[0024] Figure 2 This is one of the partial schematic diagrams of the freezer air duct of a refrigerator provided in one embodiment of the present invention;

[0025] Figure 3 This is a second partial schematic diagram of the freezer air duct of a refrigerator provided in one embodiment of this utility model;

[0026] Figure 4 This is a partial schematic diagram of the freezer air duct of a refrigerator provided in another embodiment of the present invention;

[0027] Figure 5 yes Figure 4 An enlarged schematic diagram of the heat-conducting structure and snap-fit ​​assembly shown.

[0028] Figure label:

[0029] 1. Refrigeration air duct; 2. Refrigeration evaporator; 3. Defrosting heater; 4. Refrigeration return air duct; 5. Heat-conducting structure; 6. Fan; 7. Fixture; 8. Insulation layer; 501. Heat-conducting body; 502. Buckle; 503. Snap-fit ​​protrusion; 9. Buckle assembly; 901. Fixing base; 902. Buckle piece; 9021. Slot; 9022. Hollowed-out structure. Detailed Implementation

[0030] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0031] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0033] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0034] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0035] Most refrigerators on the market currently use a rear-mounted air duct system, which increases the refrigerator's thickness. In recent years, traditional rear-mounted air duct systems have become insufficient to meet users' demands for ultra-thin refrigerators. In contrast, a vertical center-mounted air duct system can significantly reduce the refrigerator's thickness, thus achieving a further breakthrough in ultra-thin refrigerators. In a vertical center-mounted system, the refrigerator return air duct extends from the bottom of the refrigerator compartment to the bottom of the evaporator below the freezer compartment, forming an air circulation. Due to the significant temperature difference between the refrigerator compartment and the freezer evaporator, when air enters the return air duct from the refrigerator compartment, it rapidly cools and condenses at the freezer compartment inlet. As moisture accumulates, frost forms on the inner wall of the return air duct, causing blockages and affecting the refrigerator's normal operation.

[0036] Therefore, this application proposes a refrigerator designed to solve the problem of frost forming inside the refrigeration return air duct in existing refrigerators due to the large temperature difference between the refrigeration return air duct and the freezer evaporator.

[0037] The following is combined Figures 1 to 5 Describe the refrigerator of this application.

[0038] A refrigerator according to one embodiment of this application, please refer to... Figure 1 The refrigerator includes independent refrigerator and freezer compartments. The freezer compartment is located to one side of the refrigerator compartment, for example, below or above the refrigerator compartment. The freezer compartment has a freezer air duct 1, within which a freezer evaporator 2 and a defrost heater 3 are located. The defrost heater 3 is located to one side of the freezer evaporator 2 and is used to heat and defrost the freezer evaporator 2. Preferably, the defrost heater 3 is located below the freezer evaporator 2, so that when the defrost heater 3 is turned on, the hot air moves upwards to achieve the best defrosting effect on the freezer evaporator 2.

[0039] The refrigerator also includes a refrigerator return air duct 4 and a heat-conducting structure 5. The refrigerator return air duct 4 has a refrigerator air inlet and a refrigerator air outlet. The refrigerator air inlet connects to the refrigerator compartment, and the refrigerator air outlet connects to the freezer air duct 1. A portion of the refrigerator return air duct 4 extends into the freezer air duct 1. The refrigerator return air duct 4 is located on one side of the freezer evaporator 2, and the refrigerator air outlet extends to the position corresponding to the defrost heater 3. One end of the heat-conducting structure 5 is connected to the defrost heater 3, and the other end of the heat-conducting structure 5 extends into the refrigerator return air duct 4 through the refrigerator air outlet. The heat-conducting structure 5 can conduct heat from the defrost heater 3 to the refrigerator return air duct 4, thereby defrosting the inside of the refrigerator return air duct 4 and effectively solving the problem of frost buildup inside the refrigerator return air duct 4.

[0040] Please refer to the details. Figure 1 This embodiment uses a vertically oriented, centrally located refrigerator system as an example. The refrigerator compartment is positioned above the freezer compartment. A vertically oriented freezer air duct 1 is located in the center of the freezer compartment, dividing it into a left and right compartment. The freezer air duct 1 includes a fan 6, a freezer evaporator 2, a defrost heater 3, and a heat-conducting structure 5. The fan 6 is located on the side of the freezer evaporator 2 closest to the refrigerator compartment. The freezer evaporator 2 is located below the freezer air duct 1. The defrost heater 3 is located below the freezer evaporator 2. The refrigerator return air duct 4 is located in front of the vertically oriented, centrally located freezer air duct 1 (i.e., near the refrigerator door), and the refrigerator air outlet extends to a position adjacent to the defrost heater 3. The fan 6 and the freezer evaporator 2 are both located behind the refrigerator return air duct 4. One end of the heat-conducting structure 5 is connected to the defrost heater 3, and the other end extends through the refrigerator air outlet into the refrigerator return air duct 4, thereby transferring heat from the defrost heater 3 to the refrigerator return air duct 4.

[0041] The heat-conducting structure 5 can be made of metal, such as aluminum, iron, copper, or silver, etc. There are no restrictions here.

[0042] Furthermore, the portion of the heat-conducting structure 5 located inside the refrigerated return air duct 4 extends along the length of the refrigerated return air duct 4, and there is a gap between the peripheral wall of the heat-conducting structure 5 and the inner wall of the refrigerated return air duct 4.

[0043] Typically, the refrigerated return air duct 4 is made of plastic. Due to the thermal conductivity of the heat-conducting structure 5, it can conduct heat from the defrosting heater 3 to itself. The portion of the heat-conducting structure 5 located inside the refrigerated return air duct 4 extends along the length of the refrigerated return air duct 4, and there is a gap between the peripheral wall of the heat-conducting structure 5 and the inner wall of the refrigerated return air duct 4. This design avoids contact between the heat-conducting structure 5 and the inner wall of the refrigerated return air duct 4, preventing deformation or damage to the inner wall of the refrigerated return air duct 4 caused by heat conducted to the heat-conducting structure 5. In addition, the gap between the heat-conducting structure 5 and the inner wall of the refrigerated return air duct 4 allows for normal air circulation within the refrigerated return air duct 4.

[0044] Furthermore, the end of the defrost heater 3 closest to the heat-conducting structure 5 is located below the refrigerated air outlet of the refrigerated return air duct 4. Thus, when the defrost heater 3 is turned on, some hot air will move upwards and enter the refrigerated return air duct 4, further accelerating the defrosting process inside the refrigerated return air duct 4. Correspondingly, the heat-conducting structure 5 can extend along the length of the refrigerated return air duct 4, reducing the impact of its bending outside the refrigerated air outlet on the normal ventilation of the refrigerated return air duct 4.

[0045] Furthermore, an insulation layer 8 is also provided inside the refrigeration air duct 1. The insulation layer 8 is set on the outer wall of the refrigeration return air duct 4, which can further reduce frost formation inside the refrigeration return air duct 4. Since the temperature near the fan 6 is lower than other areas, optionally, the thickness of the insulation layer 8 near the fan 6 is greater than the thickness of the part away from the fan 6.

[0046] Please refer to Figures 2-3 The heat-conducting structure 5 includes a heat-conducting body 501 and a clip 502. The clip 502 is located at the end of the heat-conducting body 501 near the defrost heater 3, and the heat-conducting structure 5 is fastened to the defrost heater 3 by the clip 502. Both the heat-conducting body 501 and the clip 502 have heat-conducting functions.

[0047] Optionally, the length of the heat-conducting structure 5 is 2 / 7 to 3 / 7 of the length of the refrigeration return air duct 4. When the air entering the refrigeration return air duct 4 condenses at the freezer compartment inlet, the condensate flows towards the end near the refrigeration air outlet due to gravity, causing frost to easily accumulate near the refrigeration air outlet. The heat-conducting structure 5 of this application, with its length design, can cover the core area where frost forms inside the refrigeration return air duct 4. This ensures sufficient heat transfer to the refrigeration return air duct 4 while avoiding heat loss caused by overheating non-core areas. It also reduces interference with the airflow velocity inside the refrigeration return air duct 4, maintaining the stability of the gas flow velocity at the refrigeration air outlet.

[0048] Optionally, the heat-conducting body 501 and the clip 502 are integrally molded to reduce costs and improve structural stability.

[0049] Optionally, the defrosting heater 3 includes a heating wire, and the clip 502 forms an interference fit with the heating wire.

[0050] like Figure 3 As shown, the buckle 502 is a slot structure adapted to the heating wire. The radius of curvature of the slot structure is slightly smaller than the radius of the heating wire, so that the buckle 502 and the heating wire form an interference fit. In this way, the buckle 502 can be tightly locked onto the heating wire, preventing the heat conduction structure 5 from shaking under the influence of airflow and other factors.

[0051] Please continue to refer to Figure 2 and Figure 3 Furthermore, the contact surface between the buckle 502 and the defrost heater 3 is provided with anti-slip texture. The anti-slip texture can increase the friction between the contact surface between the buckle 502 and the defrost heater 3, further improving the stability of the connection between the heat conduction structure 5 and the defrost heater 3.

[0052] The heat-conducting body 501 can be in the form of a sheet, a tube, or a filament. Figures 1-3 Taking the sheet-like heat-conducting body 501 as an example, the sheet-like structure of the heat-conducting body 501 can not only increase heat conduction, but also the sheet-like structure set along the central axis of the refrigerated return air duct 4 will not affect the normal air circulation in the refrigerated return air duct 4.

[0053] It is understood that in other embodiments of this utility model, the heat-conducting body 501 can be made of a hollow tubular structure or a spiral filament structure to increase heat conduction without affecting the normal air circulation in the refrigeration return air duct 4.

[0054] Optionally, a retainer 7 is provided on the inner wall of the refrigerated return air duct 4. The part of the heat-conducting structure 5 located inside the refrigerated return air duct 4 is fixed on the retainer 7. The retainer 7 can limit the heat-conducting structure 5 and prevent the heat-conducting structure 5 from shaking and contacting the inner wall of the refrigerated return air duct 4 under the influence of airflow and other factors.

[0055] Optionally, the end of the heat-conducting structure 5 away from the defrost heater 3 is provided with a snap-fit ​​protrusion 503, and the retainer 7 is provided with a snap-fit ​​groove. The snap-fit ​​protrusion 503 snaps into the snap-fit ​​groove to fix the heat-conducting structure 5 to the retainer 7. Since the retainer 7 is in contact with the inner wall of the refrigeration return air duct 4, the retainer 7 can be made of a non-thermal-conducting material.

[0056] Furthermore, the surface of the fixture 7 away from the refrigeration air outlet is inclined, and this inclined surface is inclined towards the side close to the refrigeration air outlet. This inclined surface is designed to guide air and will not affect the return air in the refrigeration return air duct 4.

[0057] In an embodiment of the present utility model, the fixture 7 can construct an inclined surface and a clamping groove through its own bending. Exemplarily, the fixture 7 is a sheet-like structure, and an inclined surface and a clamping groove are constructed simultaneously through its own bending.

[0058] Please refer to Figure 4 and Figure 5 In another embodiment of the present utility model, the heat conduction structure 5 and the defrosting heater 3 are an integral structure, and a part of the heat conduction structure 5 extends into the refrigeration return air duct 4. The defrosting heater 3 includes heating wires, and the heat conduction structure 5 is formed by bending the heating wires. Among them, the part of the heat conduction structure 5 located in the refrigeration return air duct 4 is fixed in the refrigeration return air duct 4 through the buckle assembly 9, and the buckle assembly 9 can limit the heat conduction structure 5 to prevent the heat conduction structure 5 from shaking and contacting the inner wall of the refrigeration return air duct 4 under the influence of factors such as air flow.

[0059] Among them, the buckle assembly 9 includes a fixed seat 901 and at least one pair of buckle members 902. The fixed seat 901 is a hollow shell, and both ends of the buckle member 902 are respectively connected to two opposite side walls of the fixed seat 901. Each pair of buckle members 902 is arranged in parallel, and a clamping groove 9021 adapted to the heat conduction structure 5 is provided on the opposite side of each pair of buckle members 902. The heat conduction structure 5 is clamped between at least one pair of buckle members 902 and is clamped with the clamping groove 9021, and the clamping groove 9021 is in interference fit with the heat conduction structure 5.

[0060] It can be understood that when the buckle assembly 9 has two or more pairs of buckle members 902, the two or more pairs of buckle members 902 are arranged at intervals in the height direction of the fixed seat 901, so as to enhance the connection stability between the buckle assembly 9 and the heat conduction structure 5.

[0061] Optionally, the fixed seat 901 is a hollow shell structure in the shape of "U" or "□", and the buckle member 902 is a sheet-like structure, which can reduce the interference of the buckle assembly 9 on the air flow velocity in the refrigeration return air duct 4.

[0062] Furthermore, the buckle member 902 is also provided with a hollow structure 9022, and the air flow in the refrigeration return air duct 4 can pass through the hollow structure 9022 and continue to flow towards the refrigeration air outlet. This structural design can further reduce the interference of the buckle assembly 9 on the air flow velocity in the refrigeration return air duct 4.

[0063] It should be noted that the other structures in the freezing air duct of the refrigerator in this embodiment are similar to the structures of the freezing air duct in the above embodiment, and can be specifically referred to the description in the above embodiment, which will not be elaborated here.

[0064] The refrigerator of this utility model embodiment, by connecting a heat-conducting structure to the defrost heater and extending one end of the heat-conducting structure into the refrigerator return air duct, can use the heat-conducting structure to conduct the heat of the defrost heater into the refrigerator return air duct, thereby defrosting the inside of the refrigerator return air duct. This can effectively solve the problem of frost formation inside the refrigerator return air duct and improve the anti-freezing capability inside the refrigerator return air duct.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art should understand that various combinations, modifications, or equivalent substitutions of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention and should be covered within the scope of the claims of the present invention.

Claims

1. A refrigerator, characterized in that, include: Refrigeration compartment; The freezer compartment is equipped with a freezer air duct and a freezer evaporator and a defrost heater located within the freezer air duct, with the defrost heater located on one side of the freezer evaporator; The refrigerated return air duct has a refrigerated air inlet and a refrigerated air outlet. The refrigerated air inlet is connected to the refrigerated compartment, and the refrigerated air outlet is connected to the refrigeration air duct. The refrigerated return air duct is located on one side of the refrigeration evaporator, and the refrigerated air outlet extends to the position corresponding to the defrost heater. The heat-conducting structure has one end connected to the defrosting heater and the other end extending through the refrigeration air outlet into the refrigeration return air duct.

2. The refrigerator according to claim 1, characterized in that, The portion of the heat-conducting structure located inside the refrigerated return air duct extends along the length of the refrigerated return air duct, and there is a gap between the peripheral wall of the heat-conducting structure and the inner wall of the refrigerated return air duct.

3. The refrigerator according to claim 2, characterized in that, The heat-conducting structure includes a heat-conducting body and a snap fastener. The snap fastener is located at one end of the heat-conducting body near the defrost heater and is engaged with the defrost heater.

4. The refrigerator according to claim 3, characterized in that, The defrosting heater includes a heating wire, and the buckle is a slot structure adapted to the heating wire, wherein the buckle is interference-fitted with the heating wire.

5. The refrigerator according to claim 3, characterized in that, The heat-conducting body and the buckle are integrally formed.

6. The refrigerator according to claim 3, characterized in that, A retainer is provided on the inner wall of the refrigerated return air duct, and the portion of the heat-conducting structure located inside the refrigerated return air duct is fixed to the retainer.

7. The refrigerator according to claim 6, characterized in that, The end of the heat-conducting structure away from the defrosting heater is provided with a snap-fit ​​protrusion, and the fixture is provided with a snap-fit ​​groove. The snap-fit ​​protrusion snaps into the snap-fit ​​groove to fix the heat-conducting structure on the fixture.

8. The refrigerator according to claim 2, characterized in that, The heat-conducting structure and the defrosting heater are integrated into one structure. The portion of the heat-conducting structure located inside the refrigeration return air duct is fixed in the refrigeration return air duct by a snap-fit ​​assembly. The snap-fit ​​assembly includes a snap-fit ​​base and snap-fit ​​members. The snap-fit ​​base is a hollow shell. The two ends of the snap-fit ​​members are respectively connected to the two opposite side walls of the snap-fit ​​base. Each pair of snap-fit ​​members is arranged parallel to each other. Each pair of snap-fit ​​members has a slot on the opposite side that is adapted to the heat-conducting structure. The heat-conducting structure is sandwiched in at least one pair of snap-fit ​​members and snapped into the slot.

9. The refrigerator according to claim 1, characterized in that, The refrigeration air duct is also equipped with a fan and an insulation layer. The fan is located on the side of the refrigeration evaporator near the refrigerator compartment, and the insulation layer is located on the outer wall of the refrigerator return air duct.

10. The refrigerator according to any one of claims 1-9, characterized in that, The length of the heat-conducting structure accounts for 2 / 7 to 3 / 7 of the length of the refrigerated return air duct.

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