Freezer

Abstract

The present application relates to a freezer, comprising: a cabinet, wherein an air outlet is formed in the cabinet; a mounting box, arranged on the inner bottom wall of the cabinet, wherein a first air return port is formed in the top of the mounting box; a compressor, arranged on the cabinet; an evaporator, arranged in the mounting box, wherein the evaporator is connected to the compressor; a fan, arranged in the cabinet; and a bearing frame, arranged in the cabinet, wherein the bearing frame comprises a horizontal section, the horizontal section is arranged above the mounting box, and the horizontal section is spaced apart from the upper surface of the mounting box; and under the action of the fan, air in the cabinet enters the mounting box through the first air return port, and the air entering the mounting box is outputted through the air outlet after being subjected to heat exchange by the evaporator when passing through the evaporator.

Description

freezer

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese patent application No. 2024105485322, filed on May 6, 2024, and Chinese patent application No. 2024211615583, filed on May 24, 2024, the entire contents of which are incorporated herein by reference for all purposes. Technical Field

[0003] This application relates to the technical field of refrigeration equipment, and more particularly to a freezer. Background Technology

[0004] A freezer is a household or commercial appliance used for refrigerating or freezing food and goods. It typically uses refrigeration technology to maintain a low temperature to keep food fresh and extend its shelf life.

[0005] In related technologies, a freezer includes a cabinet, an installation box is installed inside the cabinet, an evaporator is installed inside the installation box, and a return air vent is opened on the installation box.

[0006] However, in related technologies, the return air vent is usually located at the top of the installation box. When there are items inside the box, the items will cover the return air vent, affecting the return air effect. This reduces the amount of air that is exchanged for heat by the evaporator, and consequently affects the overall cooling effect of the freezer.

[0007] Summary of the Invention

[0008] Therefore, it is necessary to provide a freezer that prevents items from directly blocking the return air vent, ensuring smooth airflow inside the freezer and improving cooling efficiency.

[0009] According to the first aspect, a freezer is provided, comprising:

[0010] The enclosure has an air outlet inside;

[0011] The mounting box is located on the inner bottom wall of the box body, and the top of the mounting box has a first return air vent.

[0012] The compressor is located within the housing;

[0013] An evaporator is disposed inside the mounting box and is connected to the compressor;

[0014] A fan is installed inside the mounting box and located on one side of the evaporator; and

[0015] A load-bearing frame is installed inside the box. The load-bearing frame includes a horizontal section, which is located above the mounting box and is spaced apart from the upper surface of the mounting box.

[0016] Under the action of the fan, the air inside the box enters the installation box through the first return air inlet. The air entering the installation box is heated by the evaporator when it passes through the evaporator and is then output through the air outlet.

[0017] According to the above solution, when placing items into the freezer, the items can be placed on the support rack, thereby avoiding the items directly blocking the first return air vent, ensuring smooth air circulation inside the freezer, and improving cooling efficiency.

[0018] According to the second aspect, a freezer is provided, comprising:

[0019] The housing includes an outer shell and an inner liner, the inner liner being disposed inside the outer shell, the housing having a receiving cavity, the inner liner having a first heat exchanger cavity, and the housing having a return air vent and an air outlet for connecting the receiving cavity and the first heat exchanger cavity.

[0020] The first heat exchanger is disposed inside the first heat exchanger cavity;

[0021] A fan is installed inside the inner liner. The fan rotates to cause the air in the receiving cavity to flow through the return air inlet to the first heat exchanger cavity to exchange heat with the first heat exchanger. The air after exchanging heat with the first heat exchanger flows through the air outlet back into the receiving cavity.

[0022] A first temperature detection device is used to detect the current temperature Ti of the accommodating cavity;

[0023] compressor;

[0024] A first heating device is used to defrost the first heat exchanger; and

[0025] The controller is electrically connected to the compressor, the first temperature detection device, the fan, and the first heating device, and the controller is configured to:

[0026] When the cumulative running time T1 of the compressor reaches the first time value m1, it is determined whether the difference between the current temperature Ti of the accommodating cavity and the start-up temperature Tik of the compressor is greater than the first temperature value A.

[0027] When the difference between Ti and Tik is greater than A, the fan starts to run and the compressor enters the first stage of continuous operation; when the difference between Ti and Tik is not greater than A, the fan starts to run and the compressor enters the second stage of continuous operation.

[0028] When the compressor is in the second stage and the defrosting conditions are met, the compressor stops and the fan stops or the fan continues to run. During the continuous operation of the fan, the fan stops when the fan shutdown conditions are met.

[0029] After the fan stops, the first heating device starts working to defrost.

[0030] According to a third aspect, a freezer is provided, comprising:

[0031] The housing includes an outer shell and an inner liner, the inner liner being disposed inside the outer shell, the housing having a receiving cavity, the inner liner having a first heat exchanger cavity, and the housing having a return air vent and an air outlet for connecting the receiving cavity and the first heat exchanger cavity.

[0032] The door is used to open or close the opening of the box.

[0033] The first heat exchanger is disposed inside the first heat exchanger cavity;

[0034] A fan is installed inside the inner liner; the fan rotates to cause the air in the receiving cavity to flow through the return air inlet to the first heat exchanger cavity to exchange heat with the first heat exchanger, and the air after exchanging heat with the first heat exchanger flows through the air outlet to the receiving cavity.

[0035] A first temperature detection device is used to detect the current temperature Ti of the accommodating cavity;

[0036] compressor;

[0037] A first heating device is used to defrost the first heat exchanger; and

[0038] The controller is electrically connected to the compressor, the first temperature detection device, the fan, and the first heating device, and the controller is configured to:

[0039] Before the cumulative running time T1 of the compressor reaches the first time value m1, the compressor performs periodic operation to obtain the total number of times the door is opened S;

[0040] When the cumulative running time T1 of the compressor reaches the first time value m1, it is determined whether the total number of door openings S is greater than the preset number y. If S is greater than y, it is determined whether the difference between the current temperature Ti of the cavity and the start-up temperature Tik of the compressor is greater than the first temperature value A. If S is not greater than y, the compressor is controlled to continue to work periodically. Then it is determined whether the cumulative running time T1 of the compressor reaches the second time value m2, and at the same time, it is determined again whether the total number of door openings S is greater than the preset number y. When T1 reaches m2, it is determined whether the difference between the current temperature Ti of the cavity and the start-up temperature Tik of the compressor is greater than the first temperature value A.

[0041] When the difference between Ti and Tik is greater than A, the fan starts to run and the compressor enters the first stage of continuous operation; when the difference between Ti and Tik is not greater than A, the fan starts to run and the compressor enters the second stage of continuous operation.

[0042] During the first stage of the compressor, it is determined whether the difference between the current temperature Ti of the receiving cavity and the shutdown point temperature Ti of the compressor is less than a second temperature value B. When the difference between Ti and Ti is less than B, the compressor enters the second stage of continuous operation.

[0043] During the second stage, when the defrosting conditions are met, the compressor stops, and the fan stops or continues to run. During the continuous operation of the fan, when the fan shutdown conditions are met, the fan stops.

[0044] After the fan stops, the first heating device starts working to defrost.

[0045] Details of one or more embodiments of this application are set forth in the following drawings and description. Other features, objects, and advantages of this application will become apparent from the specification, drawings, and claims. Attached Figure Description

[0046] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the disclosed drawings without creative effort.

[0047] Figure 1 is a perspective view of a freezer according to some embodiments;

[0048] Figure 2 is a three-dimensional view of the freezer shown in Figure 1 from another angle;

[0049] Figure 3 is a top view of the freezer shown in Figure 1;

[0050] Figure 4 is a side view of the freezer shown in Figure 1;

[0051] Figure 5 is a cross-sectional view along the AA direction in Figure 4;

[0052] Figure 6 is a perspective enlarged view of the load-bearing frame and cover plate according to some embodiments;

[0053] Figure 7 is a three-dimensional enlarged view of the load-bearing frame and cover plate shown in Figure 6 from another angle;

[0054] Figure 8 is a top view of the load-bearing frame and cover plate shown in Figure 6;

[0055] Figure 9 is a three-dimensional enlarged view of a load-bearing frame according to some embodiments;

[0056] Figure 10 is a perspective enlarged view of the cover plate portion according to some embodiments.

[0057] Figure 11 is a perspective view of a freezer according to some embodiments;

[0058] Figure 12 is a three-dimensional view of the freezer shown in Figure 11 after the door has been removed;

[0059] Figure 13 is a perspective view of the inner liner according to some embodiments;

[0060] Figure 14 is a perspective view of the inner liner according to some embodiments;

[0061] Figure 15 is a perspective view of a freezer according to some embodiments;

[0062] Figure 16 is a perspective view of the inner liner according to some embodiments;

[0063] Figure 17 is a perspective view of a freezer according to some embodiments;

[0064] Figure 18 is a partial perspective view of a freezer according to some embodiments;

[0065] Figure 19 is a side view of a freezer according to some embodiments;

[0066] Figure 20 is a magnified view of a portion of point A2 in Figure 19;

[0067] Figure 21 is a flowchart of a method for operating a freezer according to some embodiments;

[0068] Figure 22 is a flowchart of a method for operating a freezer according to some other embodiments;

[0069] Figure 23 is a flowchart of a method for operating a freezer according to some other embodiments;

[0070] Figure 24 is a flowchart of a method for operating a freezer according to some other embodiments;

[0071] Figure 25 is a flowchart of a method for operating a freezer according to some other embodiments;

[0072] Figure 26 is a flowchart of a method for operating a freezer according to some other embodiments;

[0073] Figure 27 is a flowchart of a method for operating a freezer according to some other embodiments;

[0074] Figure 28 is a flowchart of a method for operating a freezer according to some other embodiments;

[0075] Figure 29 is a perspective view of a freezer according to some embodiments;

[0076] Figure 30 is a perspective view of a water receiving tray according to some embodiments;

[0077] Figure 31 is a perspective view of a water receiving tray according to some embodiments;

[0078] Figure 32 is a side view of a freezer according to some embodiments;

[0079] Figure 33 is a magnified view of a portion of E2 in Figure 32;

[0080] Figure 34 is a perspective view of a freezer according to an embodiment of the present application from another angle;

[0081] Figure 35 is a magnified view of part F2 in Figure 34;

[0082] Figure 36 is a side view of a freezer according to some embodiments;

[0083] Figure 37 is a perspective view of a freezer according to some embodiments;

[0084] Figure 38 is a partial enlarged view of Figure 34;

[0085] Figure 39 is a functional block diagram of a freezer according to some implementation methods. Detailed Implementation

[0086] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0087] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0088] In this application, unless otherwise expressly 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.

[0089] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. 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.

[0090] The present application will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0091] In this application, the freezer includes a cabinet, a door, and a refrigeration system: the cabinet is typically made of metal or plastic and has a certain degree of insulation. The interior of the cabinet contains either a refrigerator compartment or a freezer compartment. The door is used to open and close the freezer. The refrigeration system includes a compressor, a condenser, an evaporator, and refrigerant. It transfers heat from the inside of the freezer to the outside, thereby achieving a cooling effect.

[0092] In the following, embodiments of this application will be described in detail with reference to the accompanying drawings.

[0093] Referring to Figures 1 and 2, in some embodiments, the freezer includes a cabinet 100.

[0094] The top of the enclosure 100 has an opening. An air outlet is provided inside the enclosure 100.

[0095] The freezer also includes a mounting box 400. The mounting box 400 is located on the inner bottom wall of the cabinet 100. A first return air vent 401a is provided on the top of the mounting box 400.

[0096] The freezer also includes a compressor, which is located in the cabinet 100.

[0097] Please refer to Figure 5. The freezer also includes an evaporator 300, which is located inside the mounting box 400 and connected to the compressor.

[0098] The freezer also includes a fan 700. The fan 700 is located inside the mounting box 400. The fan 700 is located on one side of the evaporator 300.

[0099] The freezer also includes a load-bearing frame 900, which is installed inside the cabinet 100. The load-bearing frame 900 includes a horizontal section 901, which is located above the mounting box 400 and is spaced apart from the upper surface of the mounting box 400.

[0100] Under the action of the fan, the air inside the housing 100 enters the installation box 400 through the first return air inlet 401a. The air entering the installation box 400 is heat-exchanged by the evaporator 300 when it passes through the evaporator 300 and is then output through the air outlet.

[0101] With the above solution, when placing items into the freezer, the items can be placed on the support rack 900, thus preventing items from directly blocking the first return air vent 401a, ensuring smooth airflow inside the freezer, and improving cooling efficiency. In addition, the support rack 900 also prevents items from directly pressing on the mounting box 400, protecting critical components such as the evaporator 300 inside the mounting box 400, and extending the freezer's service life.

[0102] Specifically, please refer to Figures 1 and 4. In some embodiments, the housing 100 is rectangular. The housing 100 includes an outer shell and an inner liner disposed within the outer shell. The two sides in the width direction of the housing 100 are the front and rear sides of the housing 100, respectively.

[0103] Referring to Figures 2 and 3, in some embodiments, the mounting box 400 is rectangular, and its length direction is perpendicular to the length direction of the housing 100. The mounting box 400 is horizontal in its length direction. Both ends of the mounting box 400 are connected to the two inner sidewalls of the housing 100 in its width direction, i.e., the two ends of the mounting box 400 are close to the front and rear sides of the housing 100, respectively. The inclination direction of the upper surface of the mounting box 400 is the length direction of its upper surface. The length direction of the upper surface of the mounting box 400 intersects with the length direction of the mounting box 400.

[0104] Referring to Figures 6 and 10, the upper surface of the mounting box 400 has a plurality of first return air vents 401a. The opening direction of the first return air vent 401a is the return air direction of the first return air vent 401a. In some embodiments, the return air direction of the first return air vent 401a is perpendicular to the upper surface of the mounting box 400. In some embodiments, the return air direction of the first return air vent 401a is arranged along the height direction of the box 100. In some embodiments, the first return air vent 401a is located at one end of the upper surface of the mounting box 400 near the front side of the box 100. In some embodiments, the first return air vent 401a is located at one end of the upper surface of the mounting box 400 near the rear side of the box 100.

[0105] Referring to Figures 6 and 10, in some embodiments, a second return air vent 401b is provided on the side wall of the mounting box 400. The second return air vent 401b increases the airflow path inside the freezer, further improving cooling efficiency. The second return air vent 401b makes the air circulation inside the freezer more uniform, avoiding localized overheating or overcooling. In some embodiments, the second return air vent 401b is located at one end of the mounting box 400 near the front of the cabinet 100. In some embodiments, the second return air vent 401b is located at one end of the mounting box 400 near the rear of the cabinet 100.

[0106] Referring to Figures 2 and 6, the horizontal section 901 of the support frame 900 is parallel to the upper surface of the mounting box 400. In another embodiment, the horizontal section 901 is parallel to the inner bottom wall of the box 100. In some embodiments, the support frame 900 further includes a vertical section 902. The vertical section 902 is connected to the horizontal section 901, and is spaced apart from the side of the mounting box 400 where the second return air vent 401b is located. The spaced-apart arrangement between the vertical section 902 of the support frame 900 and the side of the second return air vent 401b ensures both unobstructed access to the second return air vent 401b and stable support of the items by the support frame 900. The spaced-apart arrangement between the vertical section 902 and the second return air vent 401b prevents items or condensation from clogging the return air vent, further enhancing the performance and reliability of the freezer.

[0107] In some embodiments, the vertical section 902 and the horizontal section 901 are integrally formed, i.e., the load-bearing frame 900 is integrally formed. In other embodiments, the vertical section 902 and the horizontal section 901 may also be formed separately and then combined together by processes such as welding. In some embodiments, the horizontal section 901 and the vertical section 902 are arranged in a mesh pattern. The mesh pattern of the horizontal section 901 and the vertical section 902 not only provides sufficient load-bearing capacity but also increases the airflow channels, which helps to improve the cooling effect. In some embodiments, the horizontal section 901 and the vertical section 902 are arranged perpendicular to each other.

[0108] Referring to Figure 9, in some embodiments, the load-bearing frame 900 includes a frame 903 and a mesh member 904. The frame 903 forms the border of the load-bearing frame 900, and the mesh member 904 is disposed within the border to form the load-bearing frame 900. In some embodiments, the frame 903 is formed by bending a metal rod. In some embodiments, the frame 903 is integrally injection molded.

[0109] Referring to Figure 6, in some embodiments, the upper surface of the mounting box 400 is provided with claws 420 for fixing the horizontal section 901. The claws 420 on the upper surface of the mounting box 400 facilitate the fixing of the horizontal section 901 of the load-bearing frame 900, ensuring the stability and safety of the load-bearing frame 900. The claws 420 fixing method is simple and quick, improving the installation and maintenance efficiency of the freezer. In some embodiments, the claws 420 are used to clamp the frame 903, especially the portion of the frame 903 located above the mounting box 400. In some embodiments, multiple claws 420 are spaced apart along the length of the mounting box 400 to improve the connection strength between the load-bearing frame 900 and the mounting box 400.

[0110] Referring to Figures 2 and 3, in some embodiments, a limiting block 110 is provided on the inner bottom wall of the cabinet 100, and the side of the vertical segment 902 away from the second return air vent 401b is used to abut against the limiting block 110. The limiting block 110 on the inner bottom wall of the cabinet 100 ensures that the vertical segment 902 of the load-bearing frame 900 maintains a stable position when abutting against the limiting block 110, preventing the load-bearing frame 900 from shaking or shifting. The limiting block 110 also ensures that the position of the load-bearing frame 900 within the cabinet 100 meets the design requirements, guaranteeing the performance and safety of the freezer. In some embodiments, multiple limiting blocks 110 are spaced apart along the length of the mounting box 400 to improve the installation stability of the load-bearing frame 900 within the cabinet 100.

[0111] Referring to Figures 2 and 3, in some embodiments, a step 120 is formed at one end of the inner bottom wall of the cabinet 100, and the side of the mounting box 400 away from the second return air vent 401b is attached to the side wall of the step 120. The step 120 formed on the inner bottom wall of the cabinet 100 allows the mounting box 400 to be placed against the side wall of the step 120, improving the stability of the mounting box 400. The step 120 also optimizes the internal spatial layout of the freezer, making the structure of the freezer more compact and reasonable. In some embodiments, the step 120 is located at one end of the length direction inside the cabinet 100. The upper surface of the step 120 is directly connected to the vertical side wall at one end of the length direction inside the cabinet 100. In some embodiments, the side of the mounting box 400 near the step is attached to the vertical side plate of the step 120. In some embodiments, the second return air vent 401b is opened on the vertical side of the mounting box 400 away from the step 120.

[0112] Referring to Figure 6, in some embodiments, the mounting box 400 includes a main body and a cover plate 410. In some embodiments, the top of the main body has an opening, and the cover plate 410 is detachably mounted on the top of the main body to close the opening. The mounting box 400 adopts a detachable design for the main body and the cover plate 410, which facilitates the maintenance and replacement of the internal components of the mounting box 400. The cover plate 410 can close the opening of the main body, protecting the internal components of the mounting box 400 from external contamination and damage. In some embodiments, the cover plate 410 partially covers the upper surface of the step. The design of the cover plate 410 partially covering the upper surface of the step ensures the stability of the step and optimizes the appearance structure of the freezer. In some embodiments, claws are provided on the upper surface of the cover plate 410.

[0113] Referring to Figure 6, in some embodiments, the first return air vent 401a is formed in the cover plate 410. In some embodiments, the second return air vent 401b is formed in the cover plate 410.

[0114] To prevent excessive temperature rise in the storage cavity during defrosting from affecting the items, a freezer is proposed according to some embodiments, referring to Figures 11-12. The freezer in this embodiment is similar to the freezers shown in Figures 1 and 2, and may include a cabinet 100. The height of the cabinet 100 extends from its bottom to its top. The cabinet 100 may have a length direction. The length of the cabinet extends from one end to the other. The front and rear ends of the cabinet 100 extend in the front-rear direction. The width of the cabinet 100 extends in the front-rear direction. Of the height, front-rear, and length directions of the cabinet 100, at least two are perpendicular to each other.

[0115] Referring to Figure 12, the top of the cabinet 100 has a cabinet opening 1061. The cabinet 100 may have a receiving cavity 1060. The receiving cavity 1060 can be a space for placing items, allowing the freezer to freeze items. The receiving cavity 1060 can communicate with the cabinet opening 1061. The cabinet opening 1061 is an opening for placing items, which can be placed into the receiving cavity through the cabinet opening.

[0116] Referring to Figure 11, in some embodiments, the freezer may include a door 200. The door 200 can be used to open or close the cabinet opening 1061. The door 200 can be rotatably connected to the cabinet 100. Specifically, the rear end of the door 200 can be rotatably connected to the cabinet 100. Flipping the door 200 relative to the cabinet 100 switches the door 200 between a closed cabinet opening 1061 state and an open cabinet opening 1061 state. In some embodiments, when the door 200 opens the cabinet opening 1061, the front end of the door 200 can gradually move rearward.

[0117] Referring to Figure 12, in some embodiments, the housing 100 may include an outer shell 102. The housing 100 may include an inner liner 101. The inner liner 101 may be disposed within the outer shell 102. Items may be placed inside the inner liner 101.

[0118] Referring to Figures 16-18, a first heat exchanger cavity 1062 is provided within the inner liner 101. In this embodiment, the freezer may include a first heat exchanger. The first heat exchanger can be used for heat exchange with air. In this embodiment, the first heat exchanger can be an evaporator 300. The first heat exchanger can be disposed within the inner liner 101. In some embodiments, the first heat exchanger can be disposed within the first heat exchanger cavity 1062. The first heat exchanger can be arranged along the front-rear direction of the cabinet 100. For example, along the front-rear direction of the cabinet 100, the first heat exchanger can be arranged horizontally. The length direction of the first heat exchanger can be parallel to the front-rear direction of the cabinet 100.

[0119] In other embodiments, the length direction of the first heat exchanger may be set at an acute angle to the front-back direction of the housing 100. For example, along the length direction of the housing 100, the first heat exchanger may be inclined, in which case the width direction of the first heat exchanger is set at an acute angle to the length direction of the housing 100. The width direction of the first heat exchanger may be parallel to the length direction of the housing 100. The height direction of the first heat exchanger may be set at an acute angle to the height direction of the housing 100. Setting the length direction of the first heat exchanger to be horizontal and the width direction to be inclined facilitates the drainage of condensate, and at the same time reduces the space occupied by the first heat exchanger in the inner tank while maintaining the same heat exchange capacity, thereby increasing the storage space.

[0120] Referring to Figures 16-18, in some embodiments, the freezer may include a fan 700. The fan 700 powers the airflow. The fan 700 may be located inside the inner liner 101. The fan 700 may be located on one side of the first heat exchanger. Specifically, the fan 700 may be located on one side of the first heat exchanger in the front-rear direction. The fan 700 may be located in front of or behind the first heat exchanger.

[0121] Referring to Figures 16-18, in some embodiments, the housing 100 is further provided with a return air vent 401. The return air vent 401 can connect the receiving cavity 1060 with the first heat exchanger cavity, thereby allowing air in the receiving cavity 1060 to enter the first heat exchanger cavity 1062.

[0122] Referring to Figure 13, in some embodiments, the housing 100 is further provided with an air outlet 600. The air outlet 600 connects the receiving cavity 1060 with the first heat exchanger cavity, allowing air from the first heat exchanger cavity 1062 to enter the receiving cavity 1060. The fan 700 rotates, causing the air in the receiving cavity 1060 to flow through the return air inlet 401 to the first heat exchanger cavity 1062 to exchange heat with the first heat exchanger. The air after exchanging heat with the first heat exchanger flows back to the receiving cavity 1060 through the air outlet 600.

[0123] Referring to Figures 19-20, in some embodiments, the freezer may include a drip tray 810. The drip tray 810 may be disposed inside the inner liner 101. The drip tray 810 may be disposed below the first heat exchanger to collect condensate from the first heat exchanger.

[0124] In some embodiments, the freezer may include a first temperature detection device 841. The first temperature detection device 841 may be disposed within the receiving cavity 1060 for detecting the current temperature within the receiving cavity 1060. The first temperature detection device 841 may be disposed on the inner liner. The first temperature detection device 841 may be a temperature sensor.

[0125] Referring to Figure 39, in some embodiments, the freezer may include a compressor 842.

[0126] Referring to Figure 39, in some embodiments, the freezer may further include a condenser 847. When the compressor 842 is operating, low-temperature, low-pressure refrigerant is drawn into the compressor 842, compressed into high-temperature, high-pressure superheated gas within the cylinder of the compressor 842, and then discharged into the condenser 847. The high-temperature, high-pressure refrigerant gas dissipates heat through the condenser 847, and its temperature continuously decreases, gradually being cooled into room-temperature, high-pressure saturated vapor, and further cooled into saturated liquid, at which point the temperature no longer decreases. This temperature is called the condensation temperature, and the pressure of the refrigerant remains almost constant throughout the entire condensation process.

[0127] Referring to Figure 39, in some embodiments, the freezer may include a throttling device 848. The saturated liquid refrigerant after condensation flows into the throttling device 848 after moisture and impurities are filtered out by the dryer filter 849. Through the throttling device 848, the refrigerant is reduced in pressure and becomes a room temperature, low-pressure wet vapor.

[0128] At room temperature and low pressure, wet steam begins to absorb heat and vaporize in the evaporator, which not only lowers the temperature of the evaporator and its surroundings, but also turns the refrigerant into a low-temperature, low-pressure gas. The refrigerant that comes out of the evaporator passes through the gas-liquid separator and returns to the compressor. The above process is repeated to transfer the heat inside the freezer to the air outside the freezer, thus achieving refrigeration.

[0129] Referring to Figure 39, in some embodiments, the freezer may include a first heating device 830. The first heating device 830 is used to defrost a first heat exchanger. The first heating device 830 may be connected to the first heat exchanger.

[0130] Referring to Figure 39, in some embodiments, the freezer may include a controller 850. The controller 850 may be electrically connected to a first temperature detection device 841. The controller 850 is capable of receiving the temperature detected by the first temperature detection device 841. The controller 850 may also be electrically connected to a first heating device 830. The controller 850 is capable of controlling the start and stop of the first heating device 830. The controller 850 may be electrically connected to a compressor 842. The controller 850 is capable of controlling the stop and start of the compressor 842. The controller 850 may be electrically connected to a fan 700. The controller 850 is capable of controlling the start and stop of the fan 700.

[0131] In some embodiments, referring to Figures 21 and 22, the controller 850 can be configured as follows:

[0132] Before the cumulative running time T1 of the compressor 842 reaches the first time value m1, the compressor 842 performs periodic work to obtain the total number of times the door 200 is opened S (step S1).

[0133] When the cumulative running time T1 of compressor 842 reaches the first time value m1 (step S2), it is determined whether the total number of door openings S is greater than the preset number y (step S3). When S is greater than y, it is determined whether the difference between the current temperature Ti of the receiving cavity 1060 and the start-up temperature Tik of compressor 842 is greater than the first temperature value A (step S4).

[0134] When the difference between Ti and Tik is greater than A, the fan 700 starts running and the compressor 842 enters the first stage of continuous operation; when the difference between Ti and Tik is not greater than A, the fan 700 starts running and the compressor 842 enters the second stage of continuous operation.

[0135] During the first stage of compressor 842, it is determined whether the difference between the current temperature Ti of the receiving cavity 1060 and the shutdown point temperature Ti of compressor 842 is less than a second temperature value B (step S5). When the difference between Ti and Ti is less than B, compressor 842 enters the second stage of continuous operation (step S6).

[0136] During the second stage, when the defrosting conditions are met (step S7), compressor 842 stops, and fan 700 either stops or continues to run. During the continuous operation of fan 700, when the fan 700 stops, fan 700 stops (step S8).

[0137] After the fan 700 stops, the first heating device 830 starts to work to defrost (step S9).

[0138] According to the workflow of the above embodiment, before determining whether to defrost, it is determined whether the door is currently open. If the door is not open, a pre-cooling stage is required to lower the temperature inside the containment cavity, preventing the temperature from rising too high during defrosting and affecting the items. When the defrosting conditions are met, the fan is set to run continuously, mixing the air inside the containment cavity with the air inside the first heat exchanger cavity. This increases the temperature inside the first heat exchanger cavity for pre-defrosting and lowers the temperature inside the containment cavity, preventing the temperature from rising too high during defrosting and affecting the items.

[0139] In some embodiments, the first time value m1 is related to the current cooling level of the freezer. The temperature inside the freezer's containment cavity can be adjusted between -40°C and +10°C, for example, it can be -18°C or -24°C. Accordingly, the cooling level of the freezer can be from -40 to 10. The cooling level of the freezer can be -30, -18, etc.

[0140] In some embodiments, the controller 850 is configured to: upon receiving a set gear signal, control the compressor 842 to operate periodically according to the cycle corresponding to the received gear. During periodic operation, the compressor 842 alternates between starting and stopping.

[0141] In some embodiments, the freezer may include a display device through which the gear setting is input. The display device may be connected to a controller 850, which may receive the gear setting signal from the display device.

[0142] In some embodiments, the preset number of times y is greater than or equal to the fifteenth parameter value. The fifteenth parameter value can be 3, 4, or 5 to avoid the preset number of times being too small, which would result in frequent defrosting.

[0143] In some embodiments, the first temperature value A is greater than or equal to the thirteenth parameter value. The thirteenth parameter value can be 1, 1.5, or 2 to avoid misjudgment caused by an excessively small first temperature value and to reduce the impact of normal temperature fluctuations within the containment cavity.

[0144] In some embodiments, the value of the fourteenth parameter is greater than or equal to the first temperature value A. The value of the fourteenth parameter can be 3, 3.5, or 4 to avoid the first temperature value being too large, which would prevent the door from being opened and thus undetectable.

[0145] In some embodiments, the sixteenth parameter value is greater than or equal to the second temperature value B. The sixteenth parameter value can be 1.5°, 1°, or 0.5° to avoid the second temperature value being too large, to ensure sufficient pre-cooling, so that the temperature inside the receiving cavity 1060 is low enough to prevent the temperature inside the receiving cavity 1060 from becoming too high due to temperature rise during defrosting.

[0146] In some embodiments, the compressor 842 starts when the temperature inside the receiving cavity 1060 reaches the start-up temperature of the compressor 842. The start-up temperature of the compressor 842 is related to the current cooling setting of the freezer. The current cooling setting corresponds to a target temperature value for the receiving cavity. The start-up temperature of the compressor 842 is the target temperature value of the receiving cavity plus a temperature value. When the temperature inside the receiving cavity 1060 reaches the start-up temperature of the compressor 842, the compressor 842 starts up, preventing the temperature inside the receiving cavity 1060 from rising excessively, and then the temperature drops.

[0147] In some embodiments, compressor 842 stops when the temperature inside the receiving cavity 1060 is lower than the stop point temperature of compressor 842. The stop point temperature of compressor 842 is related to the current cooling setting of the freezer. The current cooling setting corresponds to a target temperature value for the receiving cavity 1060. The stop point temperature of compressor 842 is the target temperature value of the receiving cavity 1060 minus a certain temperature value. When the temperature inside the receiving cavity 1060 is lower than the compressor stop point temperature, compressor 842 stops, preventing the temperature inside the receiving cavity 1060 from decreasing further.

[0148] In some embodiments, when S is greater than y, it indicates that the number of times the door is opened is too high before the cumulative running time T1 of the compressor 842 reaches the first time value. A high number of door openings will result in a large amount of frost buildup on the first heat exchanger. By setting the judgment between S and y, it is possible to determine whether the first heat exchanger needs defrosting when the number of door openings is too high.

[0149] When S is greater than y, it is determined whether the difference between the current temperature Ti of the receiving cavity 1060 and the start-up temperature Tik of the compressor 842 is greater than the first temperature value A. This is to determine whether the door is currently open. If the difference between Ti and Tik is greater than A, it means the door is open, and the compressor 842 needs to perform the first stage of continuous pre-cooling. If the difference between Ti and Tik is not greater than A, it means the door is not open, and the compressor 842 only needs to perform the second stage of continuous pre-cooling.

[0150] In some embodiments, during the first stage of continuous precooling of the compressor 842, it is determined whether the difference between the current temperature Ti of the accommodating cavity 1060 and the shutdown point temperature Ti of the compressor 842 is less than the second temperature value B. The purpose is to end the first stage of continuous precooling and then proceed to the second stage of continuous precooling when the temperature in the accommodating cavity 1060 is close to the shutdown temperature of the compressor 842.

[0151] When S is greater than y, and before determining whether the first heat exchanger meets the frosting conditions, it is necessary to check whether the door is currently open. If the door is open, a two-stage pre-cooling process is required to reduce the impact of the door being open and further lower the temperature inside the receiving cavity 1060, preventing the temperature of the receiving cavity 1060 from rising too high during defrosting and affecting the items. When the door is not open, a one-stage pre-cooling process is required to lower the temperature inside the receiving cavity 1060, preventing the temperature of the receiving cavity 1060 from rising too high during defrosting and affecting the items.

[0152] When the defrosting conditions are met, the fan 700 is set to run continuously, which can mix the air in the receiving cavity 1060 with the air in the first heat exchanger cavity, which can increase the temperature in the first heat exchanger cavity for pre-defrosting, and can also reduce the temperature in the receiving cavity 1060 to avoid the temperature of the receiving cavity 1060 rising too high during defrosting and affecting the items.

[0153] In some embodiments, referring to FIG23, step S1: obtaining the total number of times the door is opened S can be specifically as follows: before the cumulative running time T1 of the compressor 842 reaches the first time value m1, at certain intervals, it is determined whether the difference between the current temperature Ti of the cavity and the compressor start-up temperature Tik is greater than the first temperature value A (step S1a). When the difference between the current temperature Ti of the cavity 1060 and the compressor start-up temperature Tik is greater than the first temperature value A, the door 200 is recorded as having been opened once and the total number of times the door is opened S is calculated (step S1b).

[0154] When the difference between the current temperature Ti of the cavity 1060 and the start-up temperature Tik of the compressor 842 is greater than the first temperature value A, it indicates that the temperature inside the cavity 1060 is higher than the start-up temperature of the compressor 842 by a certain value, which is no longer a normal temperature fluctuation. This indicates that the door is open and the external ambient temperature has affected the temperature inside the cavity 1060.

[0155] By comparing the difference between the current temperature Ti of the cavity 1060 and the start-up temperature Tik of the compressor 842 with the first temperature value A, it can be determined whether the door 200 is open. The number of times the door is opened can be obtained by relying on the first temperature detection device 841, without the need to install an additional door opening and closing sensor, thereby reducing the number of parts and saving costs.

[0156] In some embodiments, referring to Figures 21-23, the controller 850 can be configured as follows:

[0157] Before the cumulative running time T1 of the compressor 842 reaches the first time value m1, the compressor 842 performs periodic work to obtain the total number of times the door 200 is opened S (step S1).

[0158] When the cumulative running time T1 of compressor 842 reaches the first time value m1 (step S2), it is determined whether the total number of door openings S is greater than the preset number y (step S3). When S is greater than y, it is determined whether the difference between the current temperature Ti of the receiving cavity 1060 and the start-up temperature Tik of compressor 842 is greater than the first temperature value A (step S4). When S is not greater than y, compressor 842 is controlled to continue to work periodically, and then it is determined whether the cumulative running time T1 of compressor 842 reaches the second time value m2, and at the same time, it is determined again whether the total number of door openings S is greater than the preset number y; when T1 reaches m2, it is determined whether the difference between the current temperature Ti of the receiving cavity 1060 and the start-up temperature Tik of compressor 842 is greater than the first temperature value A.

[0159] When the difference between Ti and Tik is greater than A, the fan 700 starts running and the compressor 842 enters the first stage of continuous operation; when the difference between Ti and Tik is not greater than A, the fan 700 starts running and the compressor 842 enters the second stage of continuous operation.

[0160] During the first stage of compressor 842, it is determined whether the difference between the current temperature Ti of the receiving cavity 1060 and the shutdown point temperature Ti of compressor 842 is less than a second temperature value B (step S5). When the difference between Ti and Ti is less than B, compressor 842 enters the second stage of continuous operation (step S6).

[0161] During the second stage of compressor 842, when the defrosting conditions are met (step S7), compressor 842 stops, and fan 700 either stops or continues to run. During the continuous operation of fan 700, when the fan shutdown conditions are met, fan 700 stops (step S8).

[0162] After the fan 700 stops, the first heating device 830 starts to work to defrost (step S9).

[0163] According to the workflow of the above embodiment, when S is not greater than y, the compressor's cumulative time T1 is judged to reach the second time value m2 and the total number of door openings S is judged to be greater than the preset number y. When one of the conditions is met, it indicates that the first heat exchanger has a lot of frost, and it is necessary to judge whether the first heat exchanger needs to be defrosted. This avoids problems such as incomplete defrosting and frequent defrosting caused by excessive frost on the first heat exchanger, and reduces the impact of defrosting on the temperature inside the containment cavity.

[0164] In some embodiments, referring to FIG24, when S is not greater than y, the compressor 842 is controlled to continue to work periodically, and it is determined again whether the total number of door openings S is greater than the first parameter value y (step S3).

[0165] In some embodiments, referring to FIG25, when S is not greater than y, step S3a is executed: the compressor 842 is controlled to continue operating periodically, and then step S3b is executed: it is determined whether the cumulative running time T1 of the compressor 842 has reached the second time value m2. When T1 reaches m2, it is determined whether the difference between the current temperature Ti of the receiving cavity 1060 and the start-up temperature Tik of the compressor 842 is greater than the first temperature value A. When T1 does not reach m2, it is determined again whether the total number of door openings S is greater than the preset number y.

[0166] In some embodiments, referring to FIG26, when S is not greater than y, step S3a is executed: the compressor 842 is controlled to continue operating periodically, and then step S3b is executed: it is determined whether the cumulative running time T1 of the compressor 842 has reached the second time value m2. When T1 reaches m2, it is determined whether the difference between the current temperature Ti of the receiving cavity 1060 and the start-up temperature Tik of the compressor 842 is greater than the first temperature value A. When T1 does not reach m2, the compressor 842 is controlled to continue operating periodically, and then it is determined whether the cumulative running time T1 of the compressor 842 has reached the second time value m2.

[0167] In some embodiments, referring to FIG27, when S is not greater than y, step S3a is executed: the compressor 842 is controlled to continue operating periodically. Then, it is simultaneously determined whether the cumulative running time T1 of the compressor 842 has reached the second time value m2 (step S3b) and whether the total number of door openings S is greater than the preset number y (step S3). If one of the conditions is met, it indicates that the amount of frost on the first heat exchanger is too large, and it is necessary to determine whether the first heat exchanger needs to be defrosted, so as to avoid problems such as incomplete defrosting and frequent defrosting caused by excessive frost on the first heat exchanger, and reduce the impact of defrosting on the temperature inside the housing cavity 1060.

[0168] In some embodiments, m2 is greater than m1. The second time value m2 is related to the current cooling setting of the freezer. The second time value m2 ≥ the eighteenth parameter value. The eighteenth parameter value can be 7 hours, 8 hours, or 9 hours to ensure that the second time value is not too small, thus avoiding the impact of frequent defrosting on the temperature inside the housing 1060. When T1 does not reach m2, the compressor is controlled to continue operating periodically, and then it is determined whether the cumulative running time T1 of the compressor 842 has reached the second time value m2.

[0169] In some embodiments, the defrosting conditions may include a first defrosting condition, when which the compressor 842 stops. The first defrosting condition may be: the compressor 842 has been operating continuously for a period of time T2 after entering the second stage, reaching a third time value m3. This indicates that the compressor 842 has been running continuously in the second stage for a relatively long time, allowing for defrosting. In some embodiments, the third time value m3 is greater than or equal to the seventeenth parameter value. The fifteenth parameter value may be 45 minutes, 50 minutes, or 55 minutes. In some embodiments, the last start-up time of the compressor 842 before entering the first stage is the last operating time T3 of the compressor 842.

[0170] In some embodiments, the defrosting conditions may include a second defrosting condition, when which the compressor 842 stops. The second defrosting condition may be: the continuous operating time T2 of the compressor 842 after entering the second stage reaches the sum of the compressor 842's last operating time T3 and a fourth time value m4, indicating that the compressor 842 has been running continuously in the second stage for a relatively long time and defrosting can proceed. In some embodiments, the fourth time value m4 ≥ the nineteenth parameter value. The nineteenth parameter value may be 15 minutes, 20 minutes, or 25 minutes.

[0171] In some embodiments, the freezer may include a second temperature detection device 843. The second temperature detection device 843 may be disposed on the first heat exchanger and used to detect the current temperature of the first heat exchanger. The second temperature detection device 843 may be a temperature sensor.

[0172] In some embodiments, the defrosting conditions may include a third defrosting condition. When the third defrosting condition is met, the compressor 842 stops. The third defrosting condition may be: the current temperature Th of the first heat exchanger does not exceed the difference between the compressor 842's shutdown point temperature Ti and the third temperature value C. This ensures a pre-cooling effect while preventing the temperature at the first heat exchanger from becoming too low, thus avoiding excessive frost buildup. In some embodiments, the third temperature value C ≥ the twenty-first parameter value. The twenty-first parameter value may be 1°, 2°, or 3°.

[0173] In some embodiments, after the compressor 842 enters the second stage, it needs to determine whether two or three of the first defrosting condition, the second defrosting condition, and the order of determination is not restricted.

[0174] In some embodiments, after the compressor 842 enters the second stage, it determines whether the first defrosting condition is met. If the first defrosting condition is met, the compressor 842 stops. If the first defrosting condition is not met, it determines whether the second defrosting condition is met. If the second defrosting condition is met, the compressor 842 stops. If the second defrosting condition is not met, it determines whether the third defrosting condition is met. If the third defrosting condition is met, the compressor 842 stops. If the third defrosting condition is not met, it re-determines whether the first defrosting condition is met.

[0175] In some embodiments, after the compressor 842 enters the second stage, it determines whether the first defrosting condition is met. If the first defrosting condition is met, the compressor 842 stops. If the first defrosting condition is not met, it determines whether the third defrosting condition is met. If the third defrosting condition is met, the compressor 842 stops. If the third defrosting condition is not met, it determines whether the second defrosting condition is met. If the second defrosting condition is met, the compressor 842 stops; if the second defrosting condition is not met, it re-determines whether the first defrosting condition is met.

[0176] In some embodiments, after the compressor 842 enters the second stage, it determines whether a second defrosting condition is met. If the second defrosting condition is met, the compressor 842 stops. If the second defrosting condition is not met, it determines whether a first defrosting condition is met. If the first defrosting condition is met, the compressor 842 stops. If the first defrosting condition is not met, it determines whether a third defrosting condition is met. If the third defrosting condition is met, the compressor 842 stops. If the third defrosting condition is not met, it re-determines whether the second defrosting condition is met.

[0177] In some embodiments, after the compressor 842 enters the second stage, it determines whether a second defrosting condition is met. If the second defrosting condition is met, the compressor 842 stops. If the second defrosting condition is not met, it determines whether a third defrosting condition is met. If the third defrosting condition is met, the compressor 842 stops. If the third defrosting condition is not met, it determines whether a first defrosting condition is met. If the first defrosting condition is met, the compressor 842 stops. If the first defrosting condition is not met, it re-determines whether the second defrosting condition is met.

[0178] In some embodiments, after the compressor enters the second stage, it is determined whether a third defrosting condition is met. If the third defrosting condition is met, the compressor 842 stops. If the third defrosting condition is not met, it is determined whether a first defrosting condition is met. If the first defrosting condition is met, the compressor 842 stops. If the first defrosting condition is not met, it is determined whether a second defrosting condition is met. If the second defrosting condition is met, the compressor 842 stops. If the second defrosting condition is not met, the determination of whether a third defrosting condition is met is repeated.

[0179] In some embodiments, after the compressor enters the second stage, it is determined whether a third defrosting condition is met. If the third defrosting condition is met, the compressor 842 stops. If the third defrosting condition is not met, it is determined whether a second defrosting condition is met. If the second defrosting condition is met, the compressor 842 stops. If the second defrosting condition is not met, it is determined whether a first defrosting condition is met. If the first defrosting condition is met, the compressor 842 stops. If the first defrosting condition is not met, the determination of whether a third defrosting condition is met is repeated.

[0180] In some embodiments, the shutdown condition for the fan 700 can be: the difference between the current temperature Ti of the containment cavity and the current temperature Th of the first heat exchanger is less than the fourth temperature value D. This allows the temperature inside the containment cavity to be approximately the same as the temperature inside the first heat exchanger cavity, reducing the temperature of the containment cavity to avoid excessive temperature rise during defrosting, and transferring heat from the containment cavity to the first heat exchanger cavity for pre-defrosting, thus improving the defrosting effect. In some embodiments, the fourth temperature value D ≥ the twenty-second parameter value. The twenty-second parameter value can be 1°, 2°, or 3°. In some embodiments, the twenty-third parameter value ≥ the fourth temperature value D. The twenty-third parameter value can be 4°, 5°, or 6°.

[0181] In some embodiments, referring to Figures 11-15, a drain channel 10122 may be formed on the inner liner. The drain channel 10122 may communicate with the first heat exchanger cavity 1062. The drain channel 10122 is used to drain water from the inner liner 101.

[0182] In some embodiments, the freezer may include a second heating device 844. The second heating device 844 is used to defrost the drain channel 10122.

[0183] In some embodiments, referring to FIG28, the controller 850 is configured to: after the first heating device 830 starts to work, the second heating device 844 operates when the opening conditions of the second heating device 844 are met.

[0184] In some embodiments, the opening conditions of the second heating device 844 include a first opening condition. When the first opening condition is met, the second heating device operates.

[0185] The first opening condition is: the difference between the current temperature Th of the first heat exchanger and the temperature Th0 of the first heat exchanger when the first heating device 830 starts working is greater than the fifth temperature E. After the temperature at the first heat exchanger is raised to a certain extent, the second heating device 844 is opened to prevent excessive water from being caused by freezing and blockage of the drainage channel 10122, facilitating timely water drainage. In some embodiments, the fifth temperature E ≥ the twenty-fourth parameter value. The twenty-fourth parameter value can be 14°, 15°, or 16°.

[0186] In some embodiments, the opening condition of the second heating device 844 includes a second opening condition. The second heating device 844 operates when the second opening condition is met. The second opening condition is: the second heating device 844 operates when the operating time of the first heating device during this defrosting reaches 1 / 3 of the total operating time of the first heating device 830 during the previous defrosting. This ensures that the second heating device 844 opens after the first heat exchanger has operated for a certain period, preventing excessive water from being caused by freezing and blockage of the drainage channel 10122, and facilitating timely water drainage.

[0187] In some embodiments, after the first heating device 830 starts working, it needs to determine whether a first opening condition and a second opening condition are met; the order of these determinations is not limited. In some embodiments, after the first heating device 830 starts working, it determines whether the first opening condition is met. When the first opening condition is met, the second heating device 844 opens. When the first opening condition is not met, it determines whether the second opening condition is met. When the second opening condition is met, the second heating device 844 opens. When the second opening condition is not met, it re-determines whether the first opening condition is met.

[0188] In some embodiments, referring to FIG28, the controller 850 is configured to: after the second heating device 844 is working, when the current temperature Th of the first heat exchanger is greater than the sixth temperature value F, the first heating device 830 stops working and the second heating device 844 continues to work, so that the first heat exchanger stops working after defrosting.

[0189] In some embodiments, referring to FIG28, the controller 850 is configured to stop working when the cumulative working time of the second heating device 844 during the current defrosting process reaches a fifth time value. After the first heat exchanger defrosts, small ice cubes may fall into the water receiving tray 810 and flow into the drain channel 10122. Setting the second heating device 844 to continue working for a certain period of time after the first heating device 830 stops working can further defrost the device, prevent small ice cubes from blocking the drain channel 10122, and ensure smooth drainage.

[0190] In some embodiments, referring to FIG21, the controller 850 may also perform the following steps:

[0191] S1: Determine whether the difference between the current temperature Ti of the receiving cavity 1060 and the start-up temperature Tik of the compressor 842 is greater than the first temperature value A. When the difference between the current temperature Ti of the receiving cavity 1060 and the start-up temperature Tik of the compressor 842 is greater than the first temperature value A, record that the door 200 has been opened once and calculate the total number of openings S, and then proceed to step S2.

[0192] S2: Determine whether the cumulative running time T1 of compressor 842 has reached the first time value m1. If it has, execute step S3; if it has not, execute S1 again after a certain period of time.

[0193] S3: Determine if the total number of door openings S is greater than the preset number y. If S is greater than y, proceed to step S4.

[0194] In some embodiments, in step S3: when S is not greater than y, the compressor 842 performs periodic operation and then repeats S3.

[0195] In some embodiments, in step S3: when S is not greater than y, the compressor 842 operates periodically, and then it is determined whether the cumulative running time T1 of the compressor 842 has reached the second time value m2. When it has, step S4 is executed; when it has not, the compressor 842 operates periodically, and then step S3 is executed again.

[0196] In some embodiments, in step S3: when S is not greater than y, the compressor 842 operates periodically, and then it is determined whether the compressor's accumulated time T1 has reached the second time value m2. When it has, step S4 is executed; when it has not, the compressor 842 operates periodically, and then it is determined again whether the compressor 842's accumulated time T1 has reached the second time value m2.

[0197] In some embodiments, in step S3: when S is not greater than y, the compressor 842 operates periodically, and then it is determined whether the cumulative running time T1 of the compressor 842 has reached the second time value m2, and step S3 is executed simultaneously; when T1 reaches m2, step S4 is executed; when T1 does not reach m2, the compressor 842 operates periodically, and then it is determined again whether the cumulative running time T1 of the compressor 842 has reached the second time value m2.

[0198] S4: Determine whether the difference between the current temperature Ti of the receiving cavity 1060 and the start-up temperature Tik of the compressor 842 is greater than the first temperature value A. When the difference between Ti and Tik is greater than A, execute step S4a: the fan 700 starts running, the compressor 842 enters the first stage of continuous operation, and then execute step S5; when the difference between Ti and Tik is not greater than A, the fan 700 starts running (step S4b), and then execute step S6.

[0199] S5: Determine whether the difference between the current temperature Ti of the receiving cavity 1060 and the shutdown point temperature Ti of the compressor 842 is less than the second temperature value B. If the difference between Ti and Ti is less than B, proceed to step S6.

[0200] S6: Compressor 842 enters the second stage of continuous operation, and then executes step S7.

[0201] S7: Determine whether the defrosting conditions are met. If they are met, proceed to step S8.

[0202] S8: The compressor 842 stops, the fan 700 stops, and then proceed to step S9.

[0203] Referring to Figure 22, in another embodiment, after step S8, step S8a is also executed: determining whether the fan shutdown conditions are met. If the fan conditions are met, step S8b is executed: fan 700 is shut down, and then step S9 is executed. If the fan shutdown conditions are not met, the process continues to determine whether the fan shutdown conditions are met.

[0204] Referring to Figure 28, S9: The first heating device 830 operates, and then step S10 is executed.

[0205] S10: Determine whether the opening conditions of the second heating device 844 are met. If met, proceed to step S11; otherwise, continue to determine whether the opening conditions of the second heating device 844 are met.

[0206] S11: The second heating device 844 is activated, and then step S12 is executed.

[0207] S12: Determine whether the current temperature Th of the first heat exchanger is greater than the sixth temperature value F. If it is greater, execute step S12a: the first heating device 830 stops working and the second heating device 844 continues working, and then execute step S13; if it is not greater, execute step S12 again.

[0208] S13: Determine whether the cumulative working time of the second heating device 844 during this defrosting process has reached the fifth time value. If it has, execute step S14: the second heating device 844 stops working; if it has not, execute step S13 again.

[0209] In step S13, after the second heating device 844 stops working, the compressor runs periodically and then executes step S1 intermittently.

[0210] In some embodiments, referring to FIG29, the first heating device 830 may include a heating tube 831. The heating tube 831 may be an aluminum tube. In some embodiments, referring to FIG33, the heating tube 831 may include a bottom heating tube 8311. The bottom heating tube 8311 may be connected to the first heat exchanger. The bottom heating tube 8311 may be located at the bottom end of the first heat exchanger.

[0211] In some embodiments, heating tube 831 may include top heating tube 8312. Top heating tube 8312 may be connected to the first heat exchanger. Top heating tube 8312 may be located at the top of the first heat exchanger.

[0212] In some embodiments, referring to FIG29, the first heat exchanger may include a first end plate 3041. The first end plate 3041 may be disposed at one end of the first heat exchanger along the width direction.

[0213] In some embodiments, referring to FIG29, the first heat exchanger may include a second end plate 3042. The second end plate 3042 may be disposed at the other end of the first heat exchanger along the width direction.

[0214] In some embodiments, referring to FIG34, the first heat exchanger may include a plurality of fins 303. The plurality of fins 303 are disposed between the first heat exchanger end plate 3041 and the second heat exchanger end plate 3042. The thickness direction of the fins 303 is parallel to the width direction of the first heat exchanger. The fins 303 may be perpendicular to the bottom surface of the first heat exchanger. The thickness direction of the fins 303 may be perpendicular to the front-rear direction of the housing 100.

[0215] In some embodiments, referring to FIG29, the first heat exchanger may include a first refrigerant pipe 302. The first refrigerant pipe 302 penetrates a first end plate 3041 of the heat exchanger and also penetrates a second end plate 3042 of the heat exchanger. The first refrigerant pipe 302 also penetrates fins 303.

[0216] In some embodiments, referring to FIG35, fin 303 may include bottom fins 3031 disposed at the bottom of the first heat exchanger. At least a portion of the bottom fins 3031 has a fin bottom locking portion 30311 at its bottom end. The bottom end of the fin bottom locking portion 30311 has an opening, and the bottom heating tube 8311 is locked in the fin bottom locking portion 30311 through the opening at the bottom end of the fin bottom locking portion 30311, which facilitates the fixation of the bottom heating tube 30311.

[0217] In some embodiments, referring to FIG35, the bottom of the first end plate 3041 of the heat exchanger is provided with an end plate bottom locking portion 3043. The bottom of the second end plate 3042 of the heat exchanger is also provided with an end plate bottom locking portion 3043. The bottom end of the end plate bottom locking portion 3043 is provided with an opening. The bottom heating tube 8311 is locked in the end plate bottom locking portion 3043 through the bottom opening of the end plate bottom locking portion 3043, which facilitates the fixation of the bottom heating tube 8311.

[0218] In some embodiments, referring to Figures 30-31, the water receiving tray 810 may include a first water receiving plate 8103. The first water receiving plate 8103 may be located below the first heat exchanger. In some embodiments, the first water receiving plate 8103 may be provided with a first support rib 81031. The first support rib 81031 may be provided on the side of the first water receiving plate 8103 near the first heat exchanger. In some embodiments, a portion of the first water receiving plate 8103 may be recessed towards the side near the first heat exchanger to form a first recess on the side of the first water receiving plate 8103 away from the first heat exchanger, and a first support rib 81031 on the side of the first water receiving plate 8103 near the first heat exchanger. In some embodiments, the first support rib 81031 may contact the bottom heating pipe.

[0219] Referring to Figure 33, the first support rib 81031 may have a first gap G1 with the bottom heating pipe 8311. In some embodiments, the first heat exchanger may be in contact with the first support rib 81031. In other embodiments, the first heat exchanger may have a gap with the first support rib 81031. By setting the first support rib 81031 to be in contact with the bottom heating pipe 8311 or to have a first gap, the water receiving tray 810, the first heat exchanger, and the bottom heating pipe 8311 are installed normally, while the first support rib 81031 and the bottom heating pipe 8311 are as close as possible, which can enhance the heat conduction effect, compensate for the problem of low air convection thermal conductivity, and improve the defrosting effect of the bottom heating pipe on the water receiving tray. The first support rib 81031 can prevent air from flowing from the bottom of the first heat exchanger to the fan, so that the air passes through the first heat exchanger, improving the heat exchange efficiency.

[0220] In some embodiments, when the first support rib 81031 and the bottom heating tube 8311 have a first gap G1, 0 < the first gap G1. The first gap G1 ≤ the thirteenth parameter value. The thirteenth parameter value can be 5mm, 7.5mm, or 10mm, so that a certain installation gap exists, allowing the first support rib 81031 to be as close as possible to the bottom heating tube 8311.

[0221] In some embodiments, referring to FIG30, the top of the first water receiving plate 8103 is provided with a plurality of first support ribs 81031. The plurality of first support ribs 81031 are spaced apart along the front-rear direction of the housing 100, which can prevent the fins 303 from blocking the drainage, so as to make the drainage smooth. In addition, the first support ribs 81031 can block the air from flowing from the bottom of the first heat exchanger to the fan 700, so that the air passes through the first heat exchanger and improves the heat exchange efficiency.

[0222] In some embodiments, referring to Figures 30-31, the first support rib 81031 may include a first support rib support surface 8103111. The first support rib support surface 8103111 may be disposed on the top of the first support rib 81031. The first support rib support surface 8103111 is in contact with the bottom heating pipe 8311. The first support rib support surface 8103111 and the bottom heating pipe 8311 may have a first gap G1.

[0223] In some embodiments, along the length of the housing, the first support rib support surface 8103111 is inclined, such that the first support rib support surface 8103111 is adapted to the arrangement direction of the bottom heating pipe 8311 and the first heat exchanger. The inclination direction of the first support rib support surface 8103111 can be the same as the inclination direction of the bottom surface 301 of the heat exchanger. The first support rib support surfaces 8103111 of the plurality of first support ribs 81031 can be parallel or coplanar, such that the plurality of first support rib support surfaces 8103111 are adapted to the arrangement direction of the bottom heating pipe 8311 and the first heat exchanger. In some embodiments, along the front-rear direction of the housing 100, the first support rib support surface 8103111 is horizontal, such that the first support rib support surface 8103111 is adapted to the arrangement direction of the bottom heating pipe 8311 and the first heat exchanger.

[0224] In some embodiments, referring to Figures 30-31, the first support rib 81031 may have a first support rib surface 810311. The first support rib surface 810311 may include a first support rib support surface 8103111.

[0225] In some embodiments, the first water receiving plate 8103 may have a first water receiving surface 81011. The first water receiving surface 81011 may be disposed on the top of the first water receiving plate 8103. In some embodiments, the first water receiving plate 8103 may have a first supporting rib surface 810311. The first supporting rib surface 810311 may be disposed on the top of the first water receiving plate 8103. In some embodiments, along the length direction of the housing 100, the first water receiving surface 81011 may be inclined, and the inclination direction of the first water receiving surface 81011 is the same as the inclination direction of the first supporting rib supporting surface 810311, facilitating water collection. In some embodiments, along the length direction of the housing 100, the inclination direction of the first water receiving surface 81011 may be the same as the inclination direction of the heat exchanger bottom surface 301.

[0226] In some embodiments, referring to Figures 30-31, the water receiving tray 810 may include a water-receiving bottom surface 8101. The water-receiving bottom surface 8101 may be located at the inner bottom of the water receiving tray 810. In some embodiments, the water-receiving bottom surface 8101 may include a first support rib surface 810311. In some embodiments, referring to Figures 30-31, the water-receiving bottom surface 8101 may include a first water-receiving surface 81011. Along the length direction of the housing 100, the first water-receiving surface 81011 may be inclined. The first support rib surface 810311 may be connected to the first water-receiving surface 81011.

[0227] In some embodiments, referring to FIG20, the plane containing the bottom end of the first heat exchanger can be the bottom surface 301 of the heat exchanger. A vertically arranged plane perpendicular to the front-back direction of the housing 100 is defined as the first plane M1. Along the length of the housing 100, the bottom surface 301 of the heat exchanger can be inclined. The intersection of the plane containing the bottom surface 301 of the heat exchanger and the first plane M1 can be the first intersection line. The angle between the first intersection line and the horizontal plane can be the first angle α. Along the length of the housing, the inclination direction of the first water-receiving surface 81011 can be the same as the inclination direction of the bottom surface 301 of the heat exchanger. The intersection of the plane containing the first water-receiving surface 81011 and the first plane M1 can be the second intersection line. The angle between the second intersection line and the horizontal plane can be the second angle β. Setting β>α, such that the inclination angle of the first water-receiving surface 81011 is greater than the inclination angle of the bottom surface 301 of the heat exchanger, avoids obstruction of the flow of condensate at the bottom of the heat exchanger, facilitates the rapid accumulation of condensate, and facilitates condensate discharge.

[0228] In some embodiments, α > the first parameter value. The first parameter value can be 2°, 4°, or 6°. This ensures that the bottom surface 301 of the heat exchanger is inclined, allowing the condensate on the first heat exchanger to flow towards the lowest point of the first heat exchanger, facilitating the collection of condensate.

[0229] In some embodiments, α < the value of the second parameter. The value of the second parameter can be 20°, 22°, or 24°. This avoids excessive tilting of the bottom of the first heat exchanger, reduces the vertical space occupied by the bottom of the first heat exchanger, and ensures the volume of the refrigerator's accommodating cavity 1060.

[0230] In some embodiments, referring to Figures 19-20, the water receiving tray 810 may be disposed inside the inner tank 101. The water receiving tray 810 may be located below the first heat exchanger. A water receiving tray drain hole 8102 for draining water may be formed on the water receiving tray 810. In some embodiments, along the length direction of the housing 100, the water receiving tray drain hole 8102 is located on the side of the bottom end of the first water receiving surface 81011 away from the top end of the first water receiving surface 81011, to facilitate water collection and gathering.

[0231] In some embodiments, referring to Figures 30-31, the water receiving tray 810 may include a plurality of second water receiving plates 8104. Each second water receiving plate 8104 has a plurality of second water receiving surfaces 81012 located on its top.

[0232] In some embodiments, referring to Figures 30-31, the second water receiving plate 8104 may include a second front water receiving plate 81041. The second water receiving plate 8104 may include a second rear water receiving plate 81042. The second front water receiving plate 81041 may be disposed in front of the second rear water receiving plate 81042. The first water receiving plate 8103 may be located between the second front water receiving plate 81041 and the second rear water receiving plate 81042.

[0233] In some embodiments, the second front water inlet plate 81041 may have a second front water inlet surface located at its top. The second rear water inlet plate 81042 has a second rear water inlet surface located at its top. The first water inlet surface 81011 may be located between the second front water inlet surface and the second rear water inlet surface. The second front water inlet surface and the second rear water inlet surface are inclined along the length direction of the housing 100. The inclination direction of the second front water inlet surface and the second rear water inlet surface is the same as the inclination direction of the first water inlet surface 81011 along the length direction of the housing 100. In some embodiments, the second front water inlet surface and the second rear water inlet surface are inclined along the front-rear direction of the housing 100, and the inclination direction of the second front water inlet surface is opposite to the inclination direction of the second rear water inlet surface. The end of the second front water inlet surface near the second rear water inlet surface is the bottom end of the second front water inlet surface, and the end of the second rear water inlet surface near the second front water inlet surface is the bottom end of the second rear water inlet surface.

[0234] In some embodiments, the second front water inlet plate 81041 may be located in front of the first water inlet plate 8103. The second rear water inlet plate 81042 may be located behind the first water inlet plate 8103.

[0235] In some embodiments, referring to Figures 30-31, the water receiving tray 810 may include a fourth water receiving plate 8105. The fourth water receiving plate may be connected to the first water receiving plate 8103. Along the length of the housing, the fourth water receiving plate 8105 may be disposed on one side of the first water receiving plate 8103. Along the length of the housing, the fourth water receiving plate 8105 may be connected to the top of the first water receiving surface 8103. In some embodiments, the fourth water receiving plate 8105 may have a fourth water receiving surface 81051 located at its top. Along the length of the housing 100, the fourth water receiving surface is inclined. Along the front-rear direction of the housing 100, the fourth water receiving surface is horizontal. In some embodiments, the heat exchanger end plate at one end in the width direction of the first heat exchanger may be disposed on the fourth water receiving surface.

[0236] In some embodiments, referring to Figures 30-31, a third support rib 81043 is provided on the second front water inlet plate 81041. A third support rib 81043 is provided on the second rear water inlet plate 81042. The heat exchanger end plate at the other end of the width direction of the first heat exchanger may be provided on the third support rib 81043.

[0237] In some embodiments, referring to Figures 30-31, a fourth support rib 80144 is provided on the second water receiving plate 81041. The fourth support rib 80144 is located at the top of the second water receiving plate 81041. The fourth support rib 80144 is located on the side of the first heat exchanger away from the fan. The top of the fourth support rib 80144 is higher than the bottom of the first heat exchanger. The fourth support rib 80144 is used to prevent air from flowing away from the bottom of the first heat exchanger without passing through the first heat exchanger, thereby improving the heat exchange efficiency of the first heat exchanger.

[0238] In some embodiments, referring to Figures 30-31, the water receiving tray 810 may include a fifth water receiving plate 8106. The fifth water receiving plate 8106 may be located on the side of the first water receiving plate 8103 away from the fourth water receiving plate 8105. The fifth water receiving plate 8106 may be connected to the first water receiving plate 8103. Along the length of the housing 100, the fifth water receiving plate 8106 may be connected to the bottom end of the first water receiving surface 81011. The fifth water receiving plate 8106 may include a fifth water receiving surface disposed on its top. Along the length of the housing 100, the fifth water receiving surface is inclined. Along the length of the housing 100, the inclination angle of the fifth water receiving surface is greater than the inclination angle of the first water receiving surface 81011. The fifth water receiving plate 8106 may be located between the second front water receiving plate 81041 and the second rear water receiving plate 81042. The front end of the fifth water receiving plate 8106 may be connected to the second front water receiving plate 81041. The rear end of the fifth water receiving plate 8106 can be connected to the second rear water receiving plate 81042.

[0239] In some embodiments, referring to Figures 30-31, the water receiving tray 810 may include a sixth water receiving plate 8107. The sixth water receiving plate 8107 may be located on the side of the fifth water receiving plate 8106 away from the first water receiving plate 8103. The sixth water receiving plate 8107 may be connected to the fifth water receiving plate 8106. The sixth water receiving plate 8107 is inclined along the length of the housing 100. The sixth water receiving plate 8107 may be located between the second front water receiving plate 81041 and the second rear water receiving plate 81042. The front end of the sixth water receiving plate 8107 may be connected to the second front water receiving plate 81041. The rear end of the sixth water receiving plate 8107 may be connected to the second rear water receiving plate 81042.

[0240] In some embodiments, a portion of the second front water inlet plate 81041 near the compressor cavity may extend rearward and be located on the side of the first water inlet plate 8103 near the compressor cavity. In some embodiments, a portion of the second rear water inlet plate 81042 near the compressor cavity may extend forward and be located on the side of the first water inlet plate 8103 near the compressor cavity.

[0241] In some embodiments, referring to Figures 30-31, the water receiving tray 810 may include a seventh water receiving plate 8108. The seventh water receiving plate 8108 may be located on the side of the sixth water receiving plate 8107 away from the fifth water receiving plate 8106. The seventh water receiving plate 8108 may be connected to the sixth water receiving plate 8107. Along the length of the housing 100, the seventh water receiving plate 8107 is located on the bottom end of the second front water receiving surface and the second rear water receiving surface away from their top ends. The seventh water receiving plate 8107 may be connected to the bottom end of the second front water receiving plate 81041 and the second rear water receiving plate 81042.

[0242] Referring to Figures 30-31, the seventh water receiving plate 8108 has a seventh water receiving surface 81081 located at its top. Along the length of the housing 100, the seventh water receiving surface 81081 is inclined in the opposite direction to the first water receiving surface 81011, ensuring that the water receiving tray 810 has a lowest point, facilitating water collection. A drain hole 8102 for the water receiving tray can be located on the seventh water receiving plate 8108.

[0243] In some embodiments, referring to FIG18, the freezer may include a mounting box 400. The mounting box 400 is connected to the inner liner 101 to define a first heat exchanger cavity 1062.

[0244] In some embodiments, referring to FIG18, the freezer may include a heat insulation element 402. The heat insulation element 402 is located within the first heat exchanger cavity 1062. The mounting box 400 may be fitted over the outside of the heat insulation element 402.

[0245] In some embodiments, referring to FIG13, the inner liner 101 may include a first sidewall 101211. The first sidewall 101211 may be located on the side of the inner liner 101. The first sidewall 101211 may be located on the rear side of the inner liner 101.

[0246] The inner liner 101 may include a second side wall 101212. The second side wall 101212 may be located on the side wall of the inner liner 101. The second side wall 101212 may be located on the front side of the inner liner 101. In the front-rear direction of the housing 100, the first side wall 101211 and the second side wall 101212 of the inner liner are arranged opposite to each other.

[0247] In some embodiments, referring to FIG14, the freezer may include a ventilation shell 500. The ventilation shell 500 may be disposed within the inner liner 101. The ventilation shell 500 is used to form an air outlet duct. The ventilation shell 500 and the inner liner 101 may jointly define the air outlet duct. The air outlet duct may communicate with the first heat exchanger cavity 1062. In some embodiments, the ventilation shell 500 is connected to the first sidewall 101211 or the second sidewall 101212 of the inner liner.

[0248] In some embodiments, referring to FIG14, a first air outlet 601 may be formed on the ventilation housing 500. The first air outlet 601 may be located at the bottom of the ventilation housing 500. In the longitudinal direction of the housing 100, the first air outlet 601 is located on one side of the fan 700. In the longitudinal direction of the housing 100, the first air outlet 601 is located on the side of the fan 700 away from the compressor cavity.

[0249] In some embodiments, referring to FIG14, a second air outlet 602 may be formed on the ventilation housing 500. In the vertical direction, the second air outlet 602 is located above the mounting box 400.

[0250] In some embodiments, referring to FIG14, a third air outlet 603 may be formed on the ventilation housing 500. In the vertical direction, referring to FIG13-FIG14, the third air outlet 603 is located above the mounting box 400.

[0251] In some embodiments, referring to FIG13, the inner liner 101 may include a third sidewall 101213. The third sidewall 101213 is disposed on the side of the inner liner 101.

[0252] In some embodiments, the inner liner 101 may include a fourth sidewall 101214. The fourth sidewall 101214 is disposed on the side of the inner liner 101. The third sidewall 101213 and the fourth sidewall 101214 may be disposed opposite to each other.

[0253] In some embodiments, the compressor chamber is located below the third sidewall 101213 of the inner liner. In some embodiments, the second air outlet 602 may be located on the side of the third air outlet 603 away from the third sidewall 101213 of the inner liner. In some embodiments, the second air outlet 602 may face the fourth sidewall 101214 of the inner liner. The third air outlet 603 may face the third sidewall 101213 of the inner liner.

[0254] In some embodiments, referring to Figures 13-14, a fourth air outlet 604 may be formed on the ventilation housing 500. The fourth air outlet 604 may be located above the second air outlet 602 and the third air outlet 603. The fourth air outlet 604 may be located between the second air outlet 602 and the third air outlet 603. The fourth air outlet 604 may face the second sidewall 101212 of the inner liner.

[0255] In some embodiments, referring to FIG37, the freezer may include a drain pipe 845. A drain channel is formed within the drain pipe 845. In some embodiments, the drain pipe 845 may be connected to the inner liner 101. In some embodiments, the drain pipe 845 may be integrally formed with the inner liner 101. In some embodiments, the drain pipe 845 may include a first drain portion connected to the inner liner 101. The first drain portion may be integrally formed with the inner liner 101. In some embodiments, the drain pipe 845 may include a second drain portion. The second drain portion may be connected to the first drain portion.

[0256] In some embodiments, referring to FIG38, the freezer may include a heating device mounting surface 846 for mounting a second heating device 844. In some embodiments, the heating device mounting surface 846 is formed on the outer wall of the inner liner 101 and / or the outer wall of the drain pipe 845. In some embodiments, the second heating device 844 includes a heating wire.

[0257] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0258] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A freezer, comprising: The enclosure has an air outlet inside; The mounting box is located on the inner bottom wall of the box body, and the top of the mounting box has a first return air vent. The compressor is located within the housing; An evaporator is disposed inside the mounting box and is connected to the compressor; A fan is installed inside the mounting box and located on one side of the evaporator; and A load-bearing frame is installed inside the box. The load-bearing frame includes a horizontal section, which is located above the mounting box and is spaced apart from the upper surface of the mounting box. Under the action of the fan, the air inside the box enters the installation box through the first return air inlet. The air entering the installation box is heated by the evaporator when it passes through the evaporator and is then output through the air outlet.

2. The freezer according to claim 1, wherein the horizontal section is parallel to the upper surface of the mounting box, or the horizontal section is parallel to the inner bottom wall of the box body.

3. The freezer according to claim 1, wherein a second return air vent is provided on the side wall of the mounting box.

4. The freezer according to claim 3, wherein the load-bearing frame further includes a vertical section, the vertical section being connected to the horizontal section, and the vertical section being spaced apart from the side of the mounting box where the second return air vent is provided.

5. The freezer according to claim 4, wherein the horizontal section and the vertical section are mesh-like.

6. The freezer according to claim 1, wherein the upper surface of the mounting box is provided with claws, the claws being used to fix the horizontal section.

7. The freezer according to claim 4, wherein the inner bottom wall of the cabinet is provided with a limiting block, and the side of the vertical section away from the second return air vent abuts against the limiting block.

8. The freezer according to claim 4, wherein a step is formed at one end of the inner bottom wall of the cabinet, and the side of the mounting box away from the second return air vent is in contact with the step.

9. The freezer according to claim 8, wherein the mounting box includes a main body and a cover plate; the top of the main body has an opening, and the cover plate is detachably disposed on the top of the main body for closing the opening.

10. The freezer according to claim 9, wherein the cover plate partially covers the upper surface of the step.

11. A freezer, comprising: The housing includes an outer shell and an inner liner, the inner liner being disposed inside the outer shell, the housing having a receiving cavity, the inner liner having a first heat exchanger cavity, and the housing having a return air vent and an air outlet for connecting the receiving cavity and the first heat exchanger cavity. The first heat exchanger is disposed inside the first heat exchanger cavity; A fan is installed inside the inner liner. The fan rotates to cause the air in the receiving cavity to flow through the return air inlet to the first heat exchanger cavity to exchange heat with the first heat exchanger. The air after exchanging heat with the first heat exchanger flows through the air outlet back into the receiving cavity. A first temperature detection device is used to detect the current temperature Ti of the accommodating cavity; compressor; A first heating device is used to defrost the first heat exchanger; and The controller is electrically connected to the compressor, the first temperature detection device, the fan, and the first heating device, and the controller is configured to: When the cumulative running time T1 of the compressor reaches the first time value m1, it is determined whether the difference between the current temperature Ti of the accommodating cavity and the start-up temperature Tik of the compressor is greater than the first temperature value A. When the difference between Ti and Tik is greater than A, the fan starts running and the compressor enters the first stage of continuous operation; when the difference between Ti and Tik is not greater than A, the fan starts running and the compressor enters the second stage of continuous operation. When the compressor is in the second stage, and when the defrosting conditions are met, the compressor stops, and the fan... The fan may be shut down or continue to operate. During the continuous operation of the fan, if the fan shutdown conditions are met, the fan will shut down. After the fan stops, the first heating device starts working to defrost.

12. The freezer according to claim 11, wherein the top of the cabinet is provided with a cabinet opening, the freezer further includes a door for opening or closing the cabinet opening, and the controller is configured to: Before the cumulative running time T1 of the compressor reaches the first time value m1, the compressor performs periodic operation to obtain the total number of times the door is opened S; When the cumulative running time T1 of the compressor reaches the first time value m1, it is determined whether the total number of door openings S is greater than the preset number y. When S is greater than y, it is determined whether the difference between the current temperature Ti of the receiving cavity and the start-up temperature Tik of the compressor is greater than the first temperature value A.

13. The freezer according to claim 11, wherein the controller is configured to: During the first stage of the compressor operation, it is determined whether the difference between the current temperature Ti of the receiving cavity and the shutdown point temperature Ti of the compressor is less than a second temperature value B. When the difference between Ti and Ti is less than B, the compressor enters the second stage of continuous operation.

14. The freezer according to claim 11, wherein the defrosting conditions include a first defrosting condition, and the compressor stops when the first defrosting condition is met; The first defrosting condition is: After the compressor enters the second stage, the continuous working time reaches the third time value.

15. The freezer according to claim 11, wherein the last start-up time of the compressor before entering the first stage is the last running time of the compressor; The defrosting conditions include a second defrosting condition, and the compressor stops when the second defrosting condition is met. The second defrosting condition is: The compressor operates continuously for the duration specified in the second stage, which is the sum of the compressor's last operating time and the fourth time value.

16. The freezer according to claim 11, further comprising: The second temperature detection device is used to detect the current temperature of the first heat exchanger; The defrosting conditions include a third defrosting condition, and the compressor stops when the third defrosting condition is met. The third defrosting condition is: The current temperature of the first heat exchanger does not exceed the difference between the compressor's shutdown point temperature and the third temperature value.

17. The freezer according to claim 11, wherein a drainage channel is formed on the inner liner, the drainage channel being connected to the first heat exchanger cavity and used to drain water from the inner liner; The freezer includes a second heating device for defrosting the drain channel; The controller is configured to: After the first heating device starts working, the second heating device starts working when the conditions for opening the second heating device are met; The opening conditions of the second heating device include a first opening condition. When the first opening condition is met, the second heating device operates. The first opening condition is: The difference between the current temperature Th of the first heat exchanger and the temperature Th0 of the first heat exchanger when the first heating device starts working is greater than the fifth temperature E.

18. The freezer according to claim 11, wherein a drainage channel is formed on the inner liner, the drainage channel being connected to the first heat exchanger cavity and used to drain water from the inner liner; The freezer includes a second heating device for defrosting the drain channel; The controller is configured to: After the first heating device starts working, the second heating device starts working when the conditions for opening the second heating device are met; The opening conditions of the second heating device include at least a second opening condition. When the second opening condition is met, the second heating device operates. The second opening condition is: When the working time of the first heating device during this defrosting process reaches 1 / 3 of the total working time of the first heating device during the previous defrosting, the second heating device will start working.

19. The freezer according to claim 17 or 18, wherein the controller is configured to: After the second heating device starts working, when the current temperature Th of the first heat exchanger is greater than the sixth temperature value F, the first heating device stops working and the second heating device continues to work. When the cumulative working time of the second heating device reaches the fifth time value during this defrosting process, the second heating device stops working.

20. A freezer, comprising: The housing includes an outer shell and an inner liner, the inner liner being disposed inside the outer shell, the housing having a receiving cavity, the inner liner having a first heat exchanger cavity, and the housing having a return air vent and an air outlet for connecting the receiving cavity and the first heat exchanger cavity. The door is used to open or close the opening of the box. The first heat exchanger is disposed inside the first heat exchanger cavity; A fan is installed inside the inner liner; the fan rotates to cause the air in the receiving cavity to flow through the return air inlet to the first heat exchanger cavity to exchange heat with the first heat exchanger, and the air after exchanging heat with the first heat exchanger flows through the air outlet to the receiving cavity. A first temperature detection device is used to detect the current temperature Ti of the accommodating cavity; compressor; A first heating device is used to defrost the first heat exchanger; and The controller is electrically connected to the compressor, the first temperature detection device, the fan, and the first heating device, and the controller is configured to: Before the cumulative running time T1 of the compressor reaches the first time value m1, the compressor performs periodic operation to obtain the total number of times the door is opened S; When the cumulative running time T1 of the compressor reaches the first time value m1, it is determined whether the total number of door openings S is greater than the preset number y. If S is greater than y, it is determined whether the difference between the current temperature Ti of the cavity and the start-up temperature Tik of the compressor is greater than the first temperature value A. If S is not greater than y, the compressor is controlled to continue to work periodically. Then it is determined whether the cumulative running time T1 of the compressor reaches the second time value m2, and at the same time, it is determined again whether the total number of door openings S is greater than the preset number y. When T1 reaches m2, it is determined whether the difference between the current temperature Ti of the cavity and the start-up temperature Tik of the compressor is greater than the first temperature value A. When the difference between Ti and TiK is greater than A, the fan starts running and the compressor enters the first stage of continuous operation; when the difference between Ti and TiK is not greater than A, the fan starts running and the compressor enters the second stage of continuous operation. During the first stage of the compressor, it is determined whether the difference between the current temperature Ti of the receiving cavity and the shutdown point temperature Ti of the compressor is less than a second temperature value B. When the difference between Ti and Ti is less than B, the compressor enters the second stage of continuous operation. During the second stage, when the defrosting conditions are met, the compressor stops, and the fan stops or continues to run. During the continuous operation of the fan, when the fan shutdown conditions are met, the fan stops. After the fan stops, the first heating device starts working to defrost.

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