Cold storage equipment

Abstract

The utility model relates to the technical field of electrical equipment, and discloses a cold storage device which comprises a box body, a drawer and a defrosting assembly, the box body is provided with a first chamber with an opening, the drawer is arranged in the first chamber in a push-pull mode, and a sliding rail is arranged between the outer side wall of the drawer and the side wall of the first chamber. The defrosting assembly comprises at least one defrosting pipeline and a heating piece arranged on the defrosting pipeline, the defrosting pipeline is arranged in the first chamber and used for supplying air to the sliding rail, and the heating piece is used for heating airflow flowing to the sliding rail through the defrosting pipeline. According to the cold storage equipment, the defrosting assembly is arranged, the defrosting assembly comprises the defrosting pipeline and the first heating piece arranged on the defrosting pipeline, the first heating piece heats the airflow in the defrosting pipeline, and the heated airflow flows out of the defrosting pipeline and then blows to the surface of the sliding rail to move frost; the efficient frost moving effect can be achieved in the high-temperature environment, the frost accumulation problem at the sliding rail is reduced, the door opening pulling force is reduced, and the user experience is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electrical equipment, especially to a cold storage equipment. BACKGROUND

[0002] This part provides only background information related to the present disclosure, which is not necessarily prior art.

[0003] The drawer type storage box commonly used in the cold storage equipment is a commonly used movement component for assisting the sliding of the drawer in and out. With frequent door opening actions of the user, frost is accumulated at the slide rail, which makes it difficult for the user to push and pull the drawer and affects the use of the user. UTILITARY MODEL CONTENT

[0004] The utility model discloses a cold storage equipment and a slide rail frost removal method thereof.

[0005] The utility model discloses a cold storage equipment, which comprises:

[0006] The box body has a first chamber with an opening;

[0007] The drawer is push-pullably arranged in the first chamber, and a slide rail is arranged between the outer side wall of the drawer and the inner side wall of the first chamber;

[0008] The defrosting assembly comprises at least one defrosting pipeline and a first heating element arranged on the defrosting pipeline, the defrosting pipeline is arranged in the first chamber and is used for air supply for the slide rail, and the first heating element is used for heating the airflow flowing to the slide rail through the defrosting pipeline.

[0009] The cold storage equipment of the utility model has the advantages that the defrosting assembly comprises the defrosting pipeline and the first heating element arranged on the defrosting pipeline, the first heating element heats the airflow in the defrosting pipeline, the heated airflow blows to the surface of the slide rail to remove frost after flowing out of the defrosting pipeline, efficient frost removal effect can be obtained in a high-temperature environment, the frost layer on the surface of the slide rail can be melted, the frost accumulation problem at the slide rail is reduced, the door opening pulling force is reduced, and the user experience is improved.

[0010] In addition, the cold storage equipment according to the utility model can also have the following additional technical features:

[0011] In some embodiments of the utility model, along the height direction of the cold storage equipment, the defrosting pipeline is arranged on one side of the slide rail and extends along the extension direction of the slide rail, and the defrosting pipeline is provided with an air supply hole on the side facing the slide rail.

[0012] In some embodiments of the utility model, the number of air supply holes is multiple, multiple air supply holes are arranged along the extension direction of defrosting pipeline, and the interval distance between adjacent two air supply holes gradually decreases from the end of defrosting pipeline away from the opening to the end close to the opening.

[0013] In some embodiments of the utility model, the number of slide rails is two, two slide rails are arranged on opposite sides of the drawer, the defrosting pipeline comprises a defrosting main pipe and defrosting branch pipes, the number of defrosting branch pipes is two, the defrosting main pipe is communicated with two defrosting branch pipes respectively, the first heating element is arranged on the defrosting main pipe, and each defrosting branch pipe is arranged opposite to a slide rail.

[0014] In some embodiments of the utility model, the defrosting assembly further comprises a damper, the damper is arranged on the defrosting main pipe, and the damper is used for opening or closing the defrosting main pipe.

[0015] In some embodiments of the utility model, the cold storage device further comprises:

[0016] A heat exchange assembly is arranged in the box body.

[0017] An air supply assembly comprises a supply main pipe and a first air supply branch pipe, the inlet end of the supply main pipe is communicated with the heat exchange assembly, and the outlet end of the supply main pipe is communicated with the first air supply branch pipe and the defrosting pipeline respectively.

[0018] In some embodiments of the utility model, the heat exchange assembly comprises an evaporator and a fan, the space where the evaporator is located is communicated with the fan, and the outlet end of the fan is communicated with the inlet end of the supply main pipe.

[0019] In some embodiments of the utility model, the box body has a second chamber, the air supply assembly further comprises a second air supply branch pipe, the inlet end of the second air supply branch pipe is communicated with the outlet end of the supply main pipe, and the outlet end of the second air supply branch pipe is communicated with the second chamber.

[0020] In some embodiments of the utility model, the cold storage device further comprises a return air assembly, the return air assembly comprises a return air main pipe and a first return air branch pipe, the first return air branch pipe is communicated with the first chamber, the inlet end of the return air main pipe is communicated with the outlet end of the first return air branch pipe, and the outlet end of the return air main pipe is communicated with the heat exchange assembly.

[0021] In some embodiments of the utility model, the return air assembly further comprises a second return air branch pipe, and the second return air branch pipe is communicated with the second chamber and the return air main pipe respectively. BRIEF DESCRIPTION OF DRAWINGS

[0022] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments with reference made to the accompanying drawings. The drawings are for purposes of illustration only and are not intended to limit the present inventive subject matter thereto. Like reference numerals are used to indicate like or similar components throughout the several views of the drawings. In the drawings:

[0023] Figure 1 A structural schematic diagram of a cold storage device according to an embodiment of the present application is schematically shown;

[0024] Figure 2 A cross-sectional view of the cold storage device in FIG. 1 at A-A is shown; Figure 1

[0025] Figure 3 A cross-sectional view of the cold storage device in FIG. 1 at B-B is shown. Figure 1

[0026] Reference signs are as follows:

[0027] 100, cold storage device;

[0028] 1, cabinet; 11, first compartment; 12, second compartment;

[0029] 2, drawer;

[0030] 31, defrosting main pipe; 32, first defrosting branch pipe; 33, second defrosting branch pipe; 34, first heating element; 35, air supply hole; 36, air door;

[0031] 4, heat exchange assembly; 41, evaporator; 42, fan;

[0032] 51, air supply main pipe; 52, first air supply branch pipe; 53, second air supply branch pipe;

[0033] 61, air return main pipe; 62, first air return branch pipe; 63, second air return branch pipe;

[0034] 7, slide rail;

[0035] 8, second heating element. DETAILED DESCRIPTION

[0036] Exemplary embodiments of the present disclosure will be described more fully hereinafter with reference to the accompanying drawings. While example embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0037] ​​It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order in which they are described, unless specifically identified as an order dependent step. It is also to be understood that additional or alternative steps can be employed.

[0038] Although the terms first, second, third, etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first", "second", and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

[0039] Spatially relative terms, such as "inner", "outer", "inward", "outward", "lower", "bottom", "top", "upper", and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. Such spatially relative terms can be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0040] The temperature of the chamber of the deep-freezing refrigerator is usually lower than-30℃. When storing items, for example, putting items into the refrigerator or taking items out of the refrigerator, the door body of the refrigerator needs to be opened. After the door body of the refrigerating device is opened, the space in the refrigerator is in communication with the external environment, and the humid hot air in the external environment is easy to enter the refrigerator. The temperature in the refrigerator is relatively low, and the water vapor carried in the humid hot air will sublimate and frost at the inner wall and the slide rail of the refrigerator, resulting in poor refrigeration effect of the refrigerator. When the refrigerator is operated in the deep-freezing mode, the saturation enthalpy of the air supply is extremely low, the frost removal capacity of the circulating air is low, the frost on the surface of the storage chamber cannot be effectively transferred to the evaporator for melting, and as the set temperature of the freezing chamber decreases, and with the periodic opening of the door, the frost on the surface of the chamber and the slide rail is more serious, and the opening door pull exceeds the specified standard. As the frost layer gradually accumulates, the opening door pull gradually increases, affecting the user experience.

[0041] Therefore, the cold storage device 100 provided in the embodiment is provided with a defrosting pipeline and a first heating element 34. The first heating element 34 heats the airflow in the defrosting pipeline. The heated airflow flows out of the defrosting pipeline and blows towards the surface of the chamber and the slide rail 7 for frost removal, thereby solving the above technical problems.

[0042] As shown in Figures 1 to 3 According to the embodiment of the utility model, a cold storage device 100 is provided. The cold storage device 100 can be a deep-freezing refrigerator, a general household refrigerator, a freezer, etc. In the embodiment, the cold storage device 100 is a deep-freezing refrigerator. The cold storage device 100 comprises a cabinet 1, a drawer 2 and a defrosting assembly. The cabinet 1 has a first chamber 11 with an opening. The first chamber 11 is a deep-freezing chamber. The preset temperature of the deep-freezing chamber is not higher than-40℃. The opening is connected with a door body. The door body can be used to open or close the cabinet 1. The cabinet 1 is internally provided with the drawer 2 for storing food. The drawer 2 is slidably arranged in the first chamber 11. A slide rail 7 is arranged between the outer side wall of the drawer 2 and the inner side wall of the first chamber 11. The drawer 2 is slidably connected to the inner side wall of the first chamber 11 through the slide rail 7. The defrosting assembly comprises at least one defrosting pipeline and a first heating element 34 arranged on the defrosting pipeline. The defrosting pipeline is arranged in the first chamber 11. The defrosting pipeline is used to supply air to the slide rail 7. The first heating element 34 is used to heat the airflow flowing to the slide rail 7 through the defrosting pipeline. The first heating element 34 can be at least one of an electric heater, an electric heating film, a heating wire or a resistance wire. In the embodiment, the first heating element 34 is an electric heater. The power of the electric heater can be set to 30W-70W according to actual needs, for example, 30W, 40W, 60W or 70W, etc.

[0043] The cold storage equipment 100 is provided with the defrosting assembly, the defrosting assembly comprises a defrosting pipeline and a first heating piece 34 arranged on the defrosting pipeline, the first heating piece 34 heats the airflow in the defrosting pipeline, the heated airflow blows to the slide rail 7 and the surface of the drawer 2 to remove frost after flowing out of the defrosting pipeline, efficient frost removal effect can be obtained in a high-temperature environment, the frost layer on the surface of the slide rail 7 and the drawer 2 can be melted, the frost accumulation problem at the slide rail 7 and the drawer 2 is reduced, the door opening pulling force is reduced, and the user experience is improved.

[0044] In some embodiments of the utility model, along the height direction of the cold storage equipment 100, the defrosting pipeline is arranged on one side of the slide rail 7 and extends along the extension direction of the slide rail 7, and the side of the defrosting pipeline facing the slide rail 7 is provided with a air supply hole 35. Specifically, the slide rail 7 is symmetrically arranged on both sides of the drawer 2 and connects the outer wall of the drawer 2 and the inner side wall of the first chamber 11, and the structures of the two groups of slide rails 7 are the same, and the structure of the slide rail 7 is described in detail taking the slide rail 7 on one side as an example, the slide rail 7 assembly comprises a fixed rail and a sliding rail (not shown in the figure), the fixed rail is connected with the inner side wall of the first chamber 11 along the horizontal direction, and the sliding rail is slidably connected with the fixed rail, so that the drawer 2 can be push-pullly connected on the inner side wall of the first chamber 11 along the horizontal direction. The number of defrosting pipelines is two, and the two defrosting pipelines are arranged corresponding to the slide rails 7 on both sides, the defrosting pipeline is arranged above the slide rail 7, and the defrosting pipeline extends along the extension direction of the slide rail 7, that is, along the horizontal direction, the side of the defrosting pipeline facing the slide rail 7 is provided with a plurality of air supply holes 35, and the plurality of air supply holes 35 are arranged at intervals along the extension direction of the defrosting pipeline. Since the position close to the door body is more serious, the air supply holes 35 on the defrosting pipeline are arranged such that the interval distance between adjacent two air supply holes 35 gradually decreases from the end of the defrosting pipeline far away from the opening to the end close to the opening, so that the heated airflow flowing out of the defrosting pipeline close to the door body is increased, and the defrosting effect of the slide rail 7 close to the door body is improved.

[0045] In some embodiments of the utility model, defrosting pipeline includes defrosting main pipe 31 and defrosting branch pipe, the number of defrosting branch pipe is two, defrosting main pipe 31 is communicated with two defrosting branch pipes respectively, first heating piece 34 is set up on defrosting main pipe 31, and each defrosting branch pipe 31 is oppositely arranged with a slide rail. Specifically, two defrosting branch pipes are first defrosting branch pipe 32 and second defrosting branch pipe 33 respectively, the outlet end of defrosting main pipe 31 is communicated with the inlet end of first defrosting branch pipe 32 and the inlet end of second defrosting branch pipe 33 respectively, first defrosting branch pipe 32 and second defrosting branch pipe 33 are correspondingly arranged above two side slide rails 7 respectively, by setting defrosting main pipe 31 and first defrosting branch pipe 32 and second defrosting branch pipe 33 parallelly connected with defrosting main pipe 31, when defrosting of slide rail 7 is carried out, first heating piece 34 heats the airflow in defrosting main pipe 31, and the heated airflow is delivered to two side slide rails 7 through first defrosting branch pipe 32 and second defrosting branch pipe 33 respectively, and the heated airflow is blown to two side slide rails 7 and drawer 2 through air supply hole 35, thereby helping to melt the frost layer on the surface of slide rail 7 and drawer 2, reducing the frost accumulation problem of slide rail 7 and drawer 2, and facilitating user use.

[0046] In some embodiments of the utility model, defrosting assembly further includes air door 36, air door 36 is arranged on defrosting main pipe 31, and air door 36 is used for conducting or closing defrosting main pipe 31. When defrosting, air door 36 is in the open state, so that defrosting main pipe 31 is conducted, and the cold air in defrosting main pipe 31 is heated by first heating piece 34, and the heated airflow enters first defrosting branch pipe 32 and second defrosting branch pipe 33 respectively to defrost slide rail 7 and drawer 2;And when not defrosting, air door 36 can be closed, thereby closing defrosting main pipe 31.

[0047] In some embodiments of the utility model, cold storage equipment 100 still includes heat exchange component 4 and air supply component, heat exchange component 4 is arranged in box 1, air supply component includes air supply main pipe 51 and first air supply branch pipe 52, the inlet end of air supply main pipe 51 is communicated with heat exchange component 4, and the outlet end of air supply main pipe 51 is communicated with first air supply branch pipe 52 and defrosting pipeline respectively. Specifically, heat exchange component 4 includes evaporator 41 and fan 42, the bottom of evaporator 41 is provided with second heating element 8, and second heating element 8 can be at least one of electric heater, electric heating film, heating wire or resistance wire. Fan 42 is arranged at the upper end of evaporator 41, and the space where evaporator 41 is located is communicated with fan 42, and the outlet end of fan 42 is communicated with the inlet end of air supply main pipe 51. When air supply defrosting is carried out, dampener 36 is opened, first heating element 34 is electrified, and dry cold air flowing out of evaporator 41 enters air supply main pipe 51 under the entrainment of fan 42, and then is shunted to defrosting main pipe 31 and first air supply branch pipe 52, and the cold air flowing out of first air supply branch pipe 52 is used for refrigeration of first compartment 11, and the cold air entering defrosting main pipe 31 is heated by first heating element 34, and the heated airflow enters first defrosting branch pipe 32 and second defrosting branch pipe 33 respectively, and the high-temperature airflow flows out of air supply hole 35, flows through slide rail 7, and then flows along the outer panel of drawer 2, to defrost the slide rail 7 and the outer surface of drawer 2.

[0048] The recommended temperature range of first heating element 34 for heating the cold air in defrosting main pipe 31 is-10 DEG C~-30 DEG C, the higher the temperature of high-temperature airflow is, the stronger the defrosting ability is, efficient defrosting effect can be obtained in high-temperature environment, and it is helpful to melt the frost layer condensed on the slide rail 7 and the outer surface of drawer 2. Meanwhile, the larger the air volume of high-temperature airflow is, the more conducive to defrosting during defrosting. Generally, the minimum near-wall surface wind speed of the surface of the serious frosting position is about 0.4 m / s, and the setting of the rotating speed of fan 42 and the design of the size of air outlet need to consider this requirement. During defrosting, the air volume can be increased by increasing the gear of fan 42, to improve the defrosting effect.

[0049] In some embodiments of the utility model, box 1 has second compartment 12, and the air supply component further includes second air supply branch pipe 53, the inlet end of second air supply branch pipe 53 is communicated with the outlet end of air supply main pipe 51, and the outlet end of second air supply branch pipe 53 is communicated with second compartment 12. Second compartment 12 is a refrigeration compartment, and when air supply is carried out, dry cold air flowing out of evaporator 41 enters air supply main pipe 51 under the entrainment of fan 42, and then flows to second air supply branch pipe 53, and the cold air flowing out of second air supply branch pipe 53 is used for air supply of second compartment 12, to meet the preset temperature of second compartment 12.

[0050] In some embodiments of the utility model, cold storage equipment 100 further includes return air assembly, return air assembly includes return air main pipe 61 and first return air branch pipe 62, first return air branch pipe 62 is communicated with first chamber 11, the inlet end of return air main pipe 61 is communicated with the outlet end of first return air branch pipe 62, and the outlet end of return air main pipe 61 is communicated with heat exchange assembly 4. Specifically, the inlet end of first return air branch pipe 62 is arranged at the bottom of first chamber 11, by setting the position of the inlet end of first return air branch pipe 62 close to the bottom of first chamber 11, it can be guaranteed that high-temperature airflow can flow through the entire drawer 2, and then flow to the bottom of drawer 2 and then enter first return air branch pipe 62, thereby fully defrosting the outer surface of drawer 2 and improving the defrosting effect.

[0051] When air supply defrosting is performed, damper 36 is opened, first heating element 34 is powered on, and dry cold air flowing out of evaporator 41 enters air supply main pipe 51 under the entrainment of fan 42, and then is branched to defrosting main pipe 31 and first air supply branch pipe 52, cold air flowing out of first air supply branch pipe 52 is used for refrigeration of first chamber 11, and cold air entering defrosting main pipe 31 is heated by first heating element 34, and the heated airflow enters first defrosting branch pipe 32 and second defrosting branch pipe 33, respectively, high-temperature airflow flows out of air supply hole 35, flows through slide rail 7, and then flows along the outer panel of drawer 2, thereby defrosting the slide rails 7 on both sides and the outer surface of drawer 2. Then, the airflow in first chamber 11 flows to return air main pipe 61 through first return air branch pipe 62, and then returns to the bottom of evaporator 41 through return air main pipe 61, and finally, the above-mentioned air supply defrosting step is performed after being cooled and dehumidified by evaporator 41.

[0052] In the embodiment, the side of drawer 2 facing the door body is provided with a flow guide element (not shown in the figure), which is used for guiding the airflow flowing out of first defrosting branch pipe 32 and second defrosting branch pipe 33 to first return air branch pipe 62. Specifically, the flow guide element includes a flow guide baffle, when the airflow flowing out of air supply hole 35 flows downward to the bottom of drawer 2, the airflow can be prevented from mixing with the return air flow at the bottom of drawer 2, so that the airflow flows into first return air branch pipe 62 through the area between the outer wall of drawer 2 and the inner wall of first chamber 11.

[0053] In some embodiments of the utility model, the return air assembly further comprises a second return air branch pipe 63, and the second return air branch pipe 63 is in communication with the second chamber 12 and the return air main pipe 61 respectively. When air supply is performed, dry cold air flowing out of the evaporator 41 enters the air supply main pipe 51 under the entrainment of the fan 42, and then flows to the second air supply branch pipe 53, and the cold air flowing out of the second air supply branch pipe 53 supplies air to the second chamber 12 to meet the preset temperature of the second chamber 12. Then the airflow in the second chamber 12 flows to the return air main pipe 61 through the second return air branch pipe 63, and then returns to the bottom of the evaporator 41 through the return air main pipe 61, and finally circulates the above-mentioned air supply step after being cooled and dehumidified by the evaporator 41.

[0054] The cold storage device 100 of the embodiment can perform defrosting for 30 min after the door body is closed, and the main reason for frosting in the first chamber 11 is that a large amount of water vapor in the external environment enters the first chamber 11 to change phase and frost when the door body is opened, and the internal temperature of the first chamber 11 is low, so the water vapor quickly frosts after entering. Therefore, it is suggested that the defrosting process is started after the door body is closed, and defrosting is performed for 30 min to reduce the frost accumulation in the first chamber 11. The defrosting process can also be started 30 min before defrosting of the evaporator 41 to shift as much as possible to the evaporator 41 before defrosting to improve the defrosting efficiency. The refrigerator control panel can also be increased with a user self-starting defrosting function, and the user needs to start the defrosting program when defrosting is needed for the first chamber 11, and the defrosting program is exited when defrosting is not needed. The defrosting process can also be started according to the amount of water vapor entering.

[0055] The above is only a preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. A cold storage device, characterized by, The application relates to a cold storage device. The cold storage device comprises: a box body having a first chamber provided with an opening; a drawer provided in the first chamber in a pullable manner, a slide rail being arranged between the outer side wall of the drawer and the inner side wall of the first chamber; 2. The cold storage device according to claim 1, characterized by a defrosting assembly comprising at least one defrosting pipeline and a first heating element arranged on the defrosting pipeline, the defrosting pipeline being arranged in the first chamber and used for air supply of the slide rail, and the first heating element being used for heating air flow flowing to the slide rail through the defrosting pipeline.

3. The cold storage device according to claim 2, characterized by In the height direction of the cold storage device, the defrosting pipeline is arranged on one side of the slide rail and extends along the extension direction of the slide rail, and the defrosting pipeline is provided with air supply holes on the side facing the slide rail.

4. The cold storage device according to claim 1, characterized by The number of the air supply holes is multiple, the multiple air supply holes are arranged at intervals in the extension direction of the defrosting pipeline, and the interval distance between adjacent air supply holes gradually decreases from the end of the defrosting pipeline away from the opening to the end of the defrosting pipeline close to the opening.

5. The cold storage device according to claim 4, characterized by The number of the slide rails is two, the two slide rails are arranged on opposite sides of the drawer, the defrosting pipeline comprises a defrosting main pipeline and defrosting branch pipelines, the number of the defrosting branch pipelines is two, the defrosting main pipeline is in communication with the two defrosting branch pipelines respectively, the first heating element is arranged on the defrosting main pipeline, and each defrosting branch pipeline is arranged opposite to one slide rail.

6. The cold storage device according to any one of claims 1 to 5, characterized by, The defrosting assembly further comprises a damper, the damper is arranged on the defrosting main pipeline, and the damper is used for opening or closing the defrosting main pipeline. The cold storage device further comprises: a heat exchange assembly arranged on the box body; 7. The cold storage device according to claim 6, characterized by an air supply assembly comprising a main air supply pipeline and a first air supply branch pipeline, the inlet end of the main air supply pipeline is in communication with the heat exchange assembly, and the outlet end of the main air supply pipeline is in communication with the first air supply branch pipeline and the defrosting pipeline respectively.

8. The cold storage device according to claim 6, characterized by The heat exchange assembly comprises an evaporator and a fan, the space where the evaporator is arranged is in communication with the fan, and the outlet end of the fan is in communication with the inlet end of the main air supply pipeline.

9. The cold storage device according to claim 8, characterized by The box body has a second chamber, the air supply assembly further comprises a second air supply branch pipeline, the inlet end of the second air supply branch pipeline is in communication with the outlet end of the main air supply pipeline, and the outlet end of the second air supply branch pipeline is in communication with the second chamber.

10. The cold storage device according to claim 9, characterized by The cold storage device further comprises a return air assembly, the return air assembly comprises a main return air pipeline and a first return air branch pipeline, the first return air branch pipeline is in communication with the first chamber, the inlet end of the main return air pipeline is in communication with the outlet end of the first return air branch pipeline, and the outlet end of the main return air pipeline is in communication with the heat exchange assembly. The return air assembly further comprises a second return air branch pipeline, the second return air branch pipeline is in communication with the second chamber and the main return air pipeline respectively.

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