Refrigerator

Abstract

The application relates to the technical field of refrigeration equipment, and discloses a refrigerator. The refrigerator comprises an inner container, which encloses an internal space, and the inner container defines a supply air duct with a supply air outlet; a return air cover plate is located in the inner container and divides the internal space into a storage cavity and an evaporator cavity; the inlet of the supply air duct is in communication with the outlet of the evaporator cavity, and the inlet of the evaporator cavity is in communication with the storage cavity, so that the airflow flowing out of the supply air outlet flows into the evaporator cavity after flowing through the storage cavity; and a plurality of evaporators are located in the evaporator cavity. In this way, the heat exchange area of the airflow and the evaporator can be increased, and the refrigerating capacity of the refrigerator is improved.

Description

Technical Field

[0001] This application relates to the field of refrigeration equipment technology, such as a freezer. Background Technology

[0002] Currently, most large foam-door horizontal freezers on the market use direct cooling. During use, as the number of times the door is opened and closed increases, frost or even ice will form on the inner liner of the freezer, causing defrosting problems for users. It also leads to reduced storage space and increased energy consumption.

[0003] Related technologies provide an air-cooled freezer, which includes an air-cooling component, typically comprising an evaporator chamber, an evaporator, a fan, and air ducts. The evaporator exchanges heat with the airflow to form a cooling airflow, and the fan drives the flow of this cooling airflow. Air-cooling reduces frost buildup inside the freezer.

[0004] In the process of implementing the embodiments of this disclosure, at least the following problems were found in the related art:

[0005] Related air-cooled freezers typically consist of a single chamber, a fan, and an evaporator, resulting in limited cooling capacity. It should be noted that the information disclosed in the background section above is solely for enhancing understanding of the background of this application and may therefore include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0006] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0007] This disclosure provides a freezer to improve its cooling capacity.

[0008] This disclosure provides a freezer, comprising: an inner liner enclosing an internal space, the inner liner defining an air duct with an air outlet; a return air cover located within the inner liner, dividing the internal space into a storage cavity and an evaporator cavity, the inlet of the air duct being connected to the outlet of the evaporator cavity, and the inlet of the evaporator cavity being connected to the storage cavity, so that the airflow from the air outlet flows through the storage cavity and then into the evaporator cavity; and a plurality of evaporators located within the evaporator cavity.

[0009] The freezer provided in this embodiment can achieve the following technical effects:

[0010] The evaporator exchanges heat with the gas inside its chamber to create a cooling airflow. This cooling airflow flows from the evaporator chamber into the air duct, and then from the air outlet into the storage chamber, cooling the items inside. Multiple evaporators are installed within the evaporator compartment, increasing the heat exchange area between the airflow and the evaporator, thereby increasing the cooling capacity of the freezer. Furthermore, the multiple evaporators allow users to select the number of evaporators to operate, making the temperature of the cooling airflow adjustable and improving the flexibility of the freezer's cooling system.

[0011] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0012] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:

[0013] Figure 1 This is a schematic diagram of the structure of a freezer provided in an embodiment of this disclosure;

[0014] Figure 2 This is a schematic diagram of the structure of an inner liner provided in an embodiment of this disclosure;

[0015] Figure 3 This is a schematic diagram of the mating structure of an inner liner and a return air cover provided in an embodiment of this disclosure;

[0016] Figure 4 This is a schematic diagram of the mating structure of an inner liner and an evaporator provided in an embodiment of this disclosure;

[0017] Figure 5 This is a cross-sectional structural diagram of an inner liner and an evaporator provided in an embodiment of this disclosure;

[0018] Figure 6 This is a schematic diagram of the cooperative structure of two evaporators provided in an embodiment of this disclosure;

[0019] Figure 7 This is a schematic diagram of the structure of an evaporator provided in an embodiment of this disclosure;

[0020] Figure 8 This is a schematic diagram of a return air cover, a foam board, and an evaporator provided in an embodiment of this disclosure;

[0021] Figure 9 This is a schematic diagram of the cooperation structure between a first heating wire and an inner liner provided in an embodiment of this disclosure;

[0022] Figure 10This is a schematic diagram of another first heating wire and inner liner assembly structure provided in this embodiment of the present disclosure;

[0023] Figure 11 This is a cross-sectional structural diagram of another inner liner provided in this embodiment of the present disclosure;

[0024] Figure 12 This is a schematic diagram of a sidewall structure provided in an embodiment of this disclosure;

[0025] Figure 13 This is a schematic diagram of another sidewall structure provided in an embodiment of this disclosure;

[0026] Figure 14 This is a schematic diagram of the structure of a heat-conducting plate provided in an embodiment of this disclosure;

[0027] Figure 15 This is an exploded structural diagram of a return air cover provided in an embodiment of this disclosure;

[0028] Figure 16 This is a schematic diagram of the structure of the evaporator assembly provided in an embodiment of this disclosure;

[0029] Figure 17 This is a schematic diagram of the exploded structure of a sidewall provided in an embodiment of this disclosure;

[0030] Figure 18 This is a schematic diagram of the structure of a duct cover provided in an embodiment of the present disclosure;

[0031] Figure 19 This is a schematic diagram of another air duct cover provided in an embodiment of the present disclosure.

[0032] Figure label:

[0033] 1. Inner liner; 11. Side wall; 111. First side wall; 112. Second side wall; 113. Third side wall; 114. Side wall body; 115. Step; 116. Air supply duct; 1161. First air supply duct; 1162. Second air supply duct; 117. Air outlet; 1171. First air outlet; 1172. Second air outlet; 1174. First grille; 1175. Second grille; 12. Bottom wall; 13. Internal space; 131. Storage cavity; 132. Evaporator cavity; 2. Return air cover; 21. First return air outlet; 22. Second return air outlet; 2 3. Third return air vent; 24. First sub-cover plate; 241. First connecting platform; 25. Second sub-cover plate; 251. Second connecting platform; 26. Third sub-cover plate; 27. Side plate; 271. Top plate; 3. Evaporator; 31. First evaporator; 32. Second evaporator; 33. Heating tube; 331. First heating tube; 332. Second heating tube; 34. Fin; 341. Evaporator tube; 342. Windward side; 343. Clip hole; 344. Evaporator end plate; 345. Perforation; 346. Movable plate; 347. Hook; 35. First heating wire; 351. 352. Heating section 1; 353. Second heating section 2; 354. Third heating section 3; 355. Fourth heating section 4; 356. Fifth heating section 5; 37. Second heating wire; 38. Drain outlet; 39. Connecting pipe; 40. Capillary tube; 41. First capillary tube; 42. Return air pipe; 431. First return air pipe; 51. Air duct cover; 52. Cover body; 53. Air guide structure; 54. Air supply hole; 55. First sub-air duct cover; 56. Second sub-air duct cover; 57. Insert plate; 58. Insert groove; 59. Fifth buckle; 50. Air supply slot; 51. Air outlet slot; 552. Fan slot; 56. Wind baffle; 6. Foam board; 61. Grooved air duct; 62. Heat-conducting plate; 63. Ventilation opening; 7. Volute; 71. Base plate; 72. Volute cover plate; 73. First shell wall; 74. Second shell wall; 77. Impeller; 78. First air outlet; 79. Second air outlet; 8. Fan; 81. Fan drainage channel; 811. First drainage channel; 812. Second drainage channel; 82. Evaporation drainage channel; 83. Transition drainage channel; 84. First fan; 85. Second fan; 94. Housing; 95. Door; 96. Compressor. Detailed Implementation

[0034] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0035] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0036] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0037] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0038] Unless otherwise stated, the term "multiple" means two or more.

[0039] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0040] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0041] like Figures 1 to 19 As shown, this disclosure provides a freezer, particularly an air-cooled freezer, specifically an air-cooled horizontal freezer. The freezer includes a cabinet and a door 95, with the door 95 movably located above the cabinet. The cabinet includes a shell 94, an inner liner 1, and a foam layer. The inner liner 1 is located inside the shell 94, and the foam layer is located between the shell 94 and the inner liner 1. Optionally, the foam layer is an insulation material.

[0042] The inner liner 1 includes a bottom wall 12 and side walls 11. The side walls 11 include a front side wall, a rear side wall, a left side wall, and a right side wall. The front and rear side walls are arranged opposite each other and are located at the front and rear ends of the bottom wall 12, respectively, and both the front and rear side walls extend upwards. The left and right side walls are arranged opposite each other and are located at the left and right ends of the bottom wall 12, respectively, and extend upwards. The bottom wall 12, front side walls, rear side walls, left side walls, and right side walls together enclose an internal space 13. The internal space 13 has an opening that faces upwards, and a door 95 is movably mounted above the opening.

[0043] For ease of description, this application defines the front-back direction as the width direction and the left-right direction as the length direction.

[0044] This disclosure provides a refrigerator with an inner liner 1 including a first sidewall 111 and a second sidewall 112. The first sidewall 111 and the second sidewall 112 are arranged along the width direction of the inner liner 1, and both the first sidewall 111 and the second sidewall 112 define an air duct 116 with an air outlet 117. Here, the first sidewall 111 and the second sidewall 112 are arranged along the width direction of the inner liner 1, that is, the first sidewall 111 can be a rear sidewall or a front sidewall, and correspondingly, the second sidewall 112 can be a front sidewall or a rear sidewall. It can be understood that both the front sidewall and the rear sidewall define an air duct 116 with an air outlet 117. This enables air to be discharged from the internal space 13, thereby achieving air cooling.

[0045] The freezer also includes a return air cover 2, located within the internal space 13, which divides the internal space 13 into a storage cavity 131 and an evaporator cavity 132. The outlet of the evaporator cavity 132 is connected to the inlet of the air supply duct 116. The return air cover 2 has a return air inlet, allowing airflow from the storage cavity 131 to flow into the evaporator cavity 132. The storage cavity 131 is used to hold items that need to be frozen, such as meat, seafood, or tea. The evaporator cavity 132 generates cooling airflow, which flows from the evaporator cavity 132 to the air supply duct 116, then flows into the storage cavity 131 through the air supply inlet 117. After exchanging heat with the items in the storage cavity 131, the cooling airflow flows back into the evaporator cavity 132 for recooling, and then flows back into the air supply duct 116 for circulation. This achieves air circulation in the freezer, enabling air-cooled refrigeration.

[0046] It should be noted that the return air cover 2 can be of various shapes, such as L-shaped or inclined. The evaporator cavity 132 can also be of various shapes and located in different positions within the internal space 13. For example, the evaporator cavity 132 can be located at the left, middle, or right end of the internal space 13. In practical applications, the evaporator cavity 132 and the storage cavity 131 can be arranged according to the structure of the internal space 13 of the freezer.

[0047] The freezer also includes an evaporator 3 and a fan 8, with the evaporator 3 located within an evaporator cavity 132. Optionally, the fan 8 and the air supply duct 116 are located on the same side wall 11 and are connected. The fan 8 drives airflow through the evaporator cavity 132, the air supply duct 116, and the storage cavity 131, before returning to the evaporator cavity 132 via a return air vent, thus forming a circulating airflow path. Here, the evaporator 3 is used for heat exchange with the airflow within the evaporator cavity 132 to generate a cooling airflow. The fan 8 provides power for the airflow. Since the fan 8 and the air supply duct 116 are both located on the same side wall 11, the airflow from the fan 8 can flow to the air supply duct 116 without passing through a right-angle bend, reducing airflow loss, improving the freezer's cooling effect, and reducing energy consumption.

[0048] like Figure 3 As shown, Figure 3 The thick arrows indicate the air outlet direction of the first and second air supply ducts, while the thin arrows indicate the airflow direction within the storage cavity. Optionally, such as... Figure 12 and Figure 13 As shown, a fan 8 is provided in both the first sidewall 111 and the second sidewall 112. There are multiple fans 8, including a first fan 84 and a second fan 85. The first fan 84 is located in the first sidewall 111 and is connected to the first air supply duct 1161, which is defined by the first sidewall 111. The second fan 85 is located in the second sidewall 112 and is connected to the second air supply duct 1162, which is defined by the second sidewall 112. The air supply duct 116 includes the first air supply duct 1161 and the second air supply duct 1162.

[0049] In this embodiment, the airflow of the freezer flows out from the first side wall 111 and the second side wall 112 and returns to the refrigerator through the return air inlet of the return air cover 2. This shortens the flow distance of the outflowing air and reduces the obstruction of the airflow by the central beam, thereby improving the air-cooling effect of the freezer. This is particularly effective for large horizontal freezers, significantly improving their cooling performance. Furthermore, due to the use of air cooling, it reduces frost buildup on the inner liner 1, achieving frost-free operation and solving the defrosting problem.

[0050] Optionally, the number of air supply ducts 116 may be one or more. When the number of air supply ducts 116 is multiple, the multiple air supply ducts 116 are arranged sequentially at intervals along the height direction of the side wall 11.

[0051] Optionally, the number of first air supply ducts 1161 may be one or more. When there are multiple first air supply ducts 1161, they are arranged sequentially at intervals along the height direction of the first sidewall 111; and / or, the number of second air supply ducts 1162 may be one or more. When there are multiple second air supply ducts 1162, they are arranged sequentially at intervals along the height direction of the second sidewall 112. In this embodiment, the arrangement of multiple first air supply ducts 1161 and / or multiple second air supply ducts 1162 enables the air outlet of the freezer to reach all corners of the inner liner 1, thereby improving the cooling effect of the freezer.

[0052] Optionally, an air supply duct 116 of a side wall 11 may be provided in at least one of the upper, middle and lower parts of the side wall 11, which can realize air outlet to different positions of the inner liner 1.

[0053] In some optional embodiments, the number of first air supply ducts 1161 is the same as the number of second air supply ducts 1162, and they correspond one-to-one. This ensures uniform airflow on both the front and rear sides of the freezer, improving the uniformity of airflow. In other optional embodiments, the number of first air supply ducts 1161 is different from the number of second air supply ducts 1162. This allows for different air outlet positions and volumes on opposite sides of the freezer, enabling complementary air outlet positions and increasing the airflow area of ​​the freezer. Alternatively, different numbers of air supply ducts 116 can be provided according to the needs of different side walls 11, improving the flexibility of the freezer's use.

[0054] It should be noted that the number and location of the first air supply duct 1161 and the second air supply duct 1162 can be set according to usage requirements, and this application does not make specific limitations here.

[0055] Optionally, the first air supply duct 1161 extends along the length of the inner liner 1, and / or the second air supply duct 1162 extends along the length of the inner liner 1. Since the inner liner 1 of the freezer is relatively long, extending the air supply duct 116 along the length of the inner liner 1 can increase the air supply area and cooling capacity, thereby improving the cooling effect and cooling uniformity of the freezer.

[0056] Optionally, such as Figure 12As shown, a first air supply duct 1161 has multiple first air outlets 1171, which are arranged at intervals along the extension direction of the first air supply duct 1161. The multiple first air outlets 1171 enable airflow from the first air supply duct 1161 along its length, increasing airflow uniformity. Optionally, a second air supply duct 1162 has multiple second air outlets 1172, which are arranged at intervals along the extension direction of the second air supply duct 1162. The multiple second air outlets 1172 enable airflow from the second air supply duct 1162 along its length, increasing airflow uniformity.

[0057] Optionally, the first fan 84 is connected to one or more first air supply ducts 1161. The second fan 85 is connected to one or more second air supply ducts 1162. Here, one first fan 84 can simultaneously drive airflow through multiple first air supply ducts 1161, and similarly, one second fan 85 can simultaneously drive airflow through multiple second air supply ducts 1162. Ultimately, air circulation in the freezer can be achieved.

[0058] Optionally, the fan 8 is located at one end of the side wall 11. For example, the first fan 84 is located at one end of the first side wall 111, and the second fan 85 is located at one end of the second side wall 112. In this way, the airflow from the fan 8 flows in one direction, reducing the diversion of the airflow from the fan 8.

[0059] Optionally, such as Figures 4 to 8 As shown, the evaporator 3 is located within the evaporator cavity 132. There can be one or more evaporators 3. Having multiple evaporators 3 increases the heat exchange effect between the evaporator 3 and the airflow within the evaporator cavity 132, thereby improving the cooling effect of the freezer. It should be noted that having multiple evaporators 3 is not limited to the air outlet configuration of this application. For other freezers requiring evaporators 3, multiple evaporators 3 can also be installed within the evaporator cavity 132. For example, if one of the front or rear side walls has an air supply vent 117 and the return air cover 2 has a return air vent, multiple evaporators 3 can also be installed within the evaporator cavity 132. Alternatively, if the return air cover 2 has an air supply vent 117 and the evaporator cavity 132 has a bottom return air path, multiple evaporators 3 can also be installed within the evaporator cavity 132. This application will not elaborate further on this.

[0060] Optionally, when the evaporator 3 is placed inside the evaporator cavity 132, the fins of the evaporator 3 extend vertically, thus freeing up more space above for placing components such as storage baskets. Specifically, the width of the fins of the evaporator 3 extends vertically to free up more upper space.

[0061] Optionally, the number of evaporators 3 is the same as the number of fans 8 and corresponds one-to-one. The multiple evaporators 3 include a first evaporator 31 and a second evaporator 32. The first evaporator 31 is located within the evaporator cavity 132, corresponds to the first fan 84, and is connected to the first air supply duct 1161. The first fan 84 drives the airflow from the return air inlet to flow through the first evaporator 31 and then into the first air supply duct 1161. The second evaporator 32 is located within the evaporator cavity 132, corresponds to the second fan 85, and is connected to the second air supply duct 1162. The second fan 85 drives the airflow from the return air inlet to flow through the second evaporator 32 and then into the second air supply duct 1162. Here, the first evaporator 31 cooperates with the first fan 84 to drive the airflow within the first air supply duct 1161. The second evaporator 32 cooperates with the second fan 85 to drive the airflow within the second air supply duct 1162. In this way, the temperature of the airflow in the first air supply duct 1161 and the second air supply duct 1162 can be adjusted, and the cooling capacity of the first air supply duct 1161 and the second air supply duct 1162 can be guaranteed.

[0062] It should be noted that the number of evaporators 3 can also be one, with two fans 8 driving the airflow through one evaporator 3 before flowing to the first air supply duct 1161 and the second air supply duct 1162 respectively. This reduces costs and facilitates installation. The number of evaporators 3 can also be more than two, and users can reasonably arrange the number and position of the evaporators 3 according to the space of the evaporator cavity 132.

[0063] Optionally, such as Figure 4 As shown, the first evaporator 31 and the second evaporator 32 are arranged sequentially along the width direction of the inner liner 1. Here, since the first sidewall 111 and the second sidewall 112 are arranged along the width direction of the inner liner 1, the first fan 84 and the second fan 85 are also arranged along the width direction of the inner liner 1. Therefore, the first evaporator 31 and the second evaporator 32 are also arranged along the width direction of the inner liner 1. This facilitates the airflow entering from the return air vent to flow directly to the first evaporator 31 and the second evaporator 32, avoiding interference between the airflows in the two directions.

[0064] It should be noted that the first evaporator 31 and the second evaporator 32 can also be arranged in other ways. The way in which the first evaporator 31 is connected to the first air supply duct 1161 and the second evaporator 32 is connected to the second air supply duct 1162 are all optional embodiments of this application.

[0065] Optionally, the first evaporator 31 and the second evaporator 32 are spaced apart, and a return air cavity is defined between the first evaporator 31 and the second evaporator 32. The return air inlet corresponds to and is connected to the return air cavity. Here, the spaced arrangement of the first evaporator 31 and the second evaporator 32 forms the return air cavity, and the return air inlet corresponds to the return air cavity. In this way, after the airflow flows into the return air cavity through the return air inlet, it will flow to the first evaporator 31 and the second evaporator 32 on both sides respectively, which can avoid mutual interference between the airflows flowing to the two evaporators 3. Moreover, since the return air inlet corresponds to the return air cavity, the return air cavity can also serve as a foreign matter cavity. Foreign objects falling through the return air inlet can fall into the return air cavity and then be cleaned by the user, without falling into the evaporator 3 and affecting the operation of the evaporator.

[0066] Optionally, there may be one or more return air vents, and multiple return air vents can increase the return air volume of the freezer. At least one of the top, bottom, and side wall 11 of the evaporator cavity 132 facing the storage cavity 131 is provided with a return air vent. Here, the return air vent is located in the evaporator cavity 132, not on the side wall 11 of the inner liner 1. Regardless of where the air exits from within the internal space 13, the positions of the return air vent and the air outlet 117 are relatively moderate, which can improve the uniformity of airflow within the internal space 13, thereby improving temperature uniformity. This allows air from all areas of the internal space 13 to return to the refrigeration cavity nearby and then be recirculated, avoiding the formation of eddies, preventing air waste, increasing the return air volume within the freezer, and ultimately improving the cooling effect.

[0067] Optionally, such as Figure 3 and Figure 15 As shown, at least one of the top of the return air cavity, the side of the return air cavity facing the storage cavity 131, and the bottom of the return air cavity is provided with a return air inlet. The return air inlets are all located in the return air cavity, which can reduce the loss of airflow into the return air cavity and improve the smoothness of return air.

[0068] Optionally, when there are multiple return air vents, the return air vent at the top of the evaporator cavity 132 is defined as the first return air vent 21, the return air vent at the bottom of the evaporator cavity 132 is defined as the third return air vent 23, and the return air vent on the side wall 11 of the evaporator cavity 132 facing the storage cavity 131 is defined as the second return air vent 22. The first return air vent 21, the second return air vent 22, and the third return air vent 23 correspond to each other, so that the incoming air from the first return air vent 21, the second return air vent 22, and the third return air vent 23 can mix more quickly in the return air cavity and flow rapidly into the evaporator 3.

[0069] Optionally, the flow area of ​​the return air vent is matched with that of the return air cavity. That is, the flow area of ​​the return air vent is similar to or the same as that of the return air cavity. This can increase the return air volume of the return air vent, improve the smoothness of the return air, and save energy.

[0070] Optionally, the bottom wall 12 of the inner liner 1 protrudes upward to form a step 115. The area below the step 115 is used to house the compressor 96. A return air cover 2 is placed above the step 115, and the return air cover 2 and the step 115 enclose the evaporator cavity 132. The evaporator 3 is located above the step 115. Because the freezer needs to house components such as the compressor 96 and condenser, the bottom wall 12 of the inner liner 1 protrudes upward to form the step 115, and the area below the step 115 is used to avoid obstructing the compressor 96. In this application, the return air cover 2 is placed above the step 115, so that the return air cover 2, the step 115, and the side wall 11 of the inner liner 1 can enclose the evaporator cavity 132. The evaporator 3 is located above the step 115, so that the evaporator 3 does not excessively occupy the horizontal space of the internal space 13, ensuring the storage capacity of the storage cavity 131, and making the evaporator cavity 132 more compact, reducing the bulkiness inside the freezer.

[0071] The return air cover 2 and the step 115 form a third return air inlet 23 on the side wall 11 facing the storage cavity 131. The third return air inlet 23 is located at the bottom of the return air cover 2.

[0072] Optionally, the return air cover 2 extends along the width of the inner liner 1, and a portion of the return air cover 2 is recessed downwards to allow space above, facilitating the installation of a storage basket above the return air cover 2 and increasing the freezer's capacity. For example, ... Figure 3 As shown, when there are two fans 8, the height of the middle part of the return air cover is lower than the height of the two ends. The two ends of the return air cover 2 are used to match the fans 8 to realize the airflow. The middle part of the return air cover 2 is recessed to facilitate the placement of storage baskets on top.

[0073] Optionally, the bottom wall 12 of the evaporator chamber 132 is provided with a drain outlet 37 for draining defrost water from the evaporator 3. When there is only one evaporator 3, the evaporator 3 is tilted toward the drain outlet 37 to facilitate the discharge of defrost water from the evaporator 3.

[0074] Optionally, when there are multiple evaporators 3, the number of drain ports 37 can be one or more. When there is only one drain port 37, multiple evaporators 3 share one drain port 37. When there are multiple drain ports 37, each evaporator 3 is provided with at least one drain port 37. When the evaporator 3 includes a first evaporator 31 and a second evaporator 32, the defrosting water from both the first evaporator 31 and the second evaporator 32 can be discharged through the drain port.

[0075] In one specific embodiment, the drain outlet 37 is located between the first evaporator 31 and the second evaporator 32. Here, the evaporator 3 can be defrosted by heating, and the defrost water generated by the evaporator 3 can flow to the drain outlet 37 and then be discharged from the freezer.

[0076] Optionally, such as Figure 5As shown, the evaporator 3 is inclined toward the drain outlet 37 to facilitate the flow of defrost water. Optionally, the first evaporator 31 is inclined downwards along the direction from the first sidewall 111 to the second sidewall 112 so that the defrost water of the first evaporator 31 flows to the drain outlet 37; and / or, the second evaporator 32 is inclined downwards along the direction from the second sidewall 112 to the first sidewall 111 so that the defrost water of the second evaporator 32 flows to the drain outlet 37. In this embodiment, the evaporator 3 is inclined to facilitate the discharge of defrost water.

[0077] Optionally, such as Figure 7 As shown, the evaporator 3 includes an air-facing surface 342, which is connected to a return air inlet. The airflow entering from the return air inlet flows into the evaporator 3 through the air-facing surface 342. The freezer also includes a heating element 33, which is at least partially located on the air-facing surface 342 and is used to heat the evaporator 3 for defrosting.

[0078] In this embodiment, because the temperature of the evaporator 3 is low, the evaporator 3 is prone to frost formation, especially on the windward side 342 of the evaporator 3 where the airflow is large and there is more contact with the airflow. Once blocked, it will have a significant impact on the smoothness of the airflow. Therefore, the defrosting requirement of the windward side 342 is relatively large. The windward side 342 of the evaporator 3 is equipped with a heating tube 33, which can improve the defrosting efficiency and the thoroughness of the defrosting of the evaporator 3.

[0079] Optionally, heating elements 33 are provided on at least two adjacent walls of the evaporator 3, including the air-facing surface 342. Here, the provision of heating elements 33 on both adjacent walls can increase the heating area of ​​the heating elements 33, and the airflow on the wall adjacent to the air-facing surface 342 is also larger, which can further improve the defrosting efficiency.

[0080] Optionally, the evaporator 3 includes a first wall and a second wall, the second wall being disposed opposite to the first wall and disposed along the thickness direction of the evaporator 3, and the windward surface 342 being connected between the first wall and the second wall; wherein, the windward surface 342 is provided with a first heating tube 331, and the first wall and / or the second wall is provided with a second heating tube 332, and the heating tube 33 includes the first heating tube 331 and the second heating tube 332.

[0081] In this embodiment, the heating tube 33 is not only provided on the windward side 342, but also on the first wall surface and / or the second wall surface. This increases the contact area between the heating tube 33 and the evaporator 3, thereby improving the defrosting efficiency.

[0082] Optionally, the evaporator 3 includes multiple fins 34 arranged side by side. The evaporator 3 also includes an evaporator end plate 344, which is located on the windward side 342 and connected to the fins 34. The evaporator end plate 344 protrudes from the windward side 342. The evaporator end plate 344 has a through hole 345 through which the heating tube 33 passes, and the through hole 345 restricts the movement of the heating tube 33. In this embodiment, the evaporator end plate 344 protruding from the windward side 342 can also fix the heating tube 33, preventing it from moving or deforming due to gravity or external influences.

[0083] Optionally, a movable plate 346 is provided on the side of the perforation 345 away from the evaporator 3. Moving the movable plate 346 can release the restriction of the perforation 345 on the heating tube 33, so that the heating tube 33 can be moved into or out of the perforation 345. In this embodiment, the movable plate 346 facilitates the installation and removal of the heating tube 33 without damaging the fins 34 and other components of the evaporator 3, making maintenance and replacement easier.

[0084] The evaporator 3 also includes an evaporator tube 341, which passes through multiple fins 34 in a reciprocating manner. The heating tube 33 is arranged in an S-shape on the wall of the evaporator 3, which can increase the contact area between the heating tube 33 and the evaporator 3 and improve the defrosting efficiency of the heating tube 33 on the evaporator 3.

[0085] Optionally, the freezer also includes a hook 347, which is located on the windward side 342, connected to the fins 34, and protrudes from the windward side 342. The hook 347 has a bent structure, the bent structure being opposite to the opening direction of the third sub-heating tube 33 of the second heating tube 332. The third sub-heating tube 33 of the second heating tube 332 is located inside the hook 347, so that the hook 347 can restrict the movement of the second heating tube 332. In this embodiment, since the second heating tube 332 is bent, the hook 347 can further fix the second heating tube 332. Moreover, the setting of the hook 347 makes it easier for the user to determine the windward side 342, and when the user installs the evaporator 3, the evaporator 3 can be accurately placed and the heating tube 33 can be set, preventing installation errors. It also serves to prevent the heating tube 33 from being inserted incorrectly.

[0086] Optionally, when the freezer includes a first evaporator 31 and a second evaporator 32, the second evaporator 32 and the first evaporator 31 are arranged alternately along the direction of the inner liner 1, and the return air vent is located between the first evaporator 31 and the second evaporator 32. The windward surface 342 of the first evaporator 31 and the windward surface 342 of the second evaporator 32 are arranged opposite to each other, and both the windward surface 342 of the first evaporator 31 and the windward surface 342 of the second evaporator 32 are provided with heating tubes 33.

[0087] In this embodiment, after the return air flows into the evaporator cavity 132, it flows to the first evaporator 31 and the second evaporator 32 respectively. The windward side 342 of the first evaporator 31 and the windward side 342 of the second evaporator 32 are both equipped with heating tubes 33, which can ensure the defrosting efficiency of the first evaporator 31 and the second evaporator 32.

[0088] It is understood that when a freezer includes a first evaporator 31 and a second evaporator 32, each evaporator 3 can be equipped with the aforementioned heating element 33, which will not be elaborated further here.

[0089] Optionally, such as Figure 9 and Figure 10 As shown, the freezer also includes a first heating wire 35, which is located in the inner liner 1 and is at least partially located below the fan 8 for heating and defrosting the fan 8.

[0090] In this embodiment, since the fan 8 is located downstream of the evaporator 3, the refrigerant gas flowing out of the evaporator 3 will pass through the fan 8, thus causing frost to form on the fan 8 as well. The evaporator 3 is generally equipped with a heating device for defrosting, but the heat from this device is limited, resulting in insufficient heat transfer to the fan 8, which may lead to incomplete defrosting. Therefore, a first heating wire 35 is provided below the fan 8 to improve its defrosting efficiency, ensuring thorough defrosting, improving the smoothness of air return, and ultimately guaranteeing the cooling effect of the freezer.

[0091] Optionally, the bottom of the fan 8 is attached to the bottom wall 12, meaning the bottom of the fan 8 is attached to or close to the bottom wall 12, and the first heating wire 35 is at least partially located on the side of the bottom wall 12 away from the fan 8. Here, since the side of the bottom wall 12 facing the internal space 13 needs to accommodate components such as the evaporator 3 and heating tube 33, the space on that side is limited. The first heating wire 35 is located on the side of the bottom wall 12 away from the fan 8 and is at least partially located at the bottom of the fan 8 to improve the defrosting efficiency of the fan 8.

[0092] In some alternative embodiments, such as Figure 10 As shown, the first heating wire 35 includes a first heating section 351 and a second heating section 352. The first heating section 351 is located on the side of the bottom wall 12 away from the internal space 13, and corresponds to the fan 8, used to heat the bottom of the fan 8. The second heating section 352 is located on the side wall 11 away from the internal space 13, and corresponds to the fan 8, used to heat the side of the fan 8.

[0093] In this embodiment, the first heating section 351 is used to defrost the bottom of the fan 8, and the second heating section 352 is used to defrost the side of the fan 8. This can increase the defrosting of the fan 8 from multiple directions and improve the defrosting efficiency.

[0094] It can be understood that the number of first heating wires 35 and fans 8 are the same and correspond one-to-one. That is to say, when there are two or more fans 8, the bottom of each fan 8 can be provided with the first heating wire 35 mentioned above in this application.

[0095] Optionally, such as Figure 2 As shown, when the bottom wall 12 has a drain outlet 37, part of the bottom wall 12 is recessed downward to form a fan drain channel 81. The fan drain channel 81 extends from the bottom of the fan 8 to the drain outlet 37 to facilitate the discharge of defrosting water from the fan 8.

[0096] In this embodiment, when the freezer is defrosted, the frost on the fan 8 will also melt. The fan drainage channel 81 is designed to facilitate the discharge of defrosting water from the fan 8.

[0097] Optionally, the fan drain channel 81 is inclined downwards along the direction from the fan 8 to the drain outlet 37. Here, the fan drain channel 81 is inclined downwards, so that the defrosting water of the fan 8 can flow more smoothly under the action of gravity, so as to make the drainage more thorough.

[0098] Optionally, the flow area of ​​the fan drainage channel 81 gradually decreases along the direction from the fan 8 to the drain outlet 37. Here, the initial flow area of ​​the fan drainage channel 81 is relatively large, which can receive more defrosting water from the fan 8. As the defrosting water flows, the flow area gradually decreases, which can accelerate the flow speed of the defrosting water and improve the thoroughness of drainage.

[0099] Optionally, the bottom wall 12 is also constructed with an evaporation drainage channel 82, which is higher than the fan drainage channel 81 and is connected to the drain outlet 37. The evaporator 3 is located above the evaporation drainage channel 82, and the defrosting water from the evaporator 3 can flow along the evaporation drainage channel 82 to the drain outlet 37. In this embodiment, the defrosting water after the evaporator 3 defrosts can flow through the evaporation drainage channel 82 to the drain outlet 37 and flow out from the drain outlet 37.

[0100] Optionally, the evaporative drainage channel 82 is inclined downwards along the direction from the fan 8 to the drain outlet 37. Here, the inclined arrangement of the evaporative drainage channel 82 also facilitates the rapid flow of defrosting water from the evaporator 3 to the drain outlet 37, improving the thoroughness of drainage.

[0101] Optionally, such as Figure 11 As shown, the tilt angle of the fan drainage channel 81 is different from that of the evaporation drainage channel 82.

[0102] In this embodiment, the fan drainage channel 81 and the evaporator drainage channel 82 have different inclination angles to avoid mutual interference between the drainage of the fan 8 and the evaporator 3.

[0103] Optionally, the angle between the evaporator drain channel 82 and the horizontal direction is greater than the angle between the fan drain channel 81 and the horizontal direction. Here, the fan drain channel 81 is located below the evaporator 3, the evaporator drain channel 82 has a large angle of inclination, and the evaporator 3 is located above the evaporator drain channel 82. This way, the evaporator 3 will not block the fan drain channel 81, so that the fan 8 and the evaporator 3 can drain water simultaneously.

[0104] Optionally, the height of the bottom of the fan 8 is less than the height of the evaporator 3 from the end facing the fan 8. Here, the fan 8 is lowered by a certain distance, and the fan drainage channel 81 is lower than the evaporator drainage channel 82, which facilitates the drainage of the fan 8 and allows the two drainage channels to drain at different angles.

[0105] Optionally, there are multiple evaporation drainage channels 82, and a fan drainage channel 81 is constructed between two adjacent evaporation drainage channels 82. The evaporator 3 is located above the two adjacent evaporation drainage channels 82 and covers at least part of the fan drainage channel 81. In this embodiment, the evaporator 3 covers the fan drainage channel 81, so that the evaporator 3 will not block the drainage of the fan drainage channel 81, and some of the defrosting water from the evaporator 3 can also flow into the fan drainage channel 81 and flow out from the fan drainage channel 81.

[0106] Optionally, there may be one or more fan drainage channels 81. When there are multiple fan drainage channels 81, the multiple fan drainage channels 81 and multiple evaporation drainage channels 82 are staggered to increase the drainage capacity of the fan 8 and the evaporator 3.

[0107] Optionally, when the freezer includes a first fan 84 and a second fan 85, the number of fan drainage channels 81 is the same as the number of fans 8 and corresponds one-to-one. This ensures that defrost water from each fan 8 can flow out of the freezer. It should be noted that the fan drainage channels 81 and evaporator drainage channels 82 in this application include, but are not limited to, the freezer form with fans 8 and evaporators 3 described above. When the freezer has one or more fans 8, it can also have corresponding fan drainage channels 81 and evaporator drainage channels 82. Any method that enables drainage through different drainage channels of the fans 8 and evaporators 3 is an optional embodiment of this application.

[0108] When multiple fans 8 include a first fan 84 and a second fan 85, multiple fan drainage channels 81 include a first drainage channel 811 and a second drainage channel 812. A drain outlet 37 is located between the first drainage channel 811 and the second drainage channel 812, so that defrosting water from both fans 8 can flow to the drain outlet 37. It should be noted that there can also be multiple drain outlets 37, with different fan drainage channels 81 each flowing out through their respective corresponding drain outlets 37.

[0109] Optionally, the number of evaporators 3 can be one or more. When there is only one evaporator 3, it is located on the bottom wall 12, and the drain outlet 37 can be located below or to one side of the evaporator 3. Alternatively, there can be multiple evaporators 3, including a first evaporator 31 and a second evaporator 32. The bottom wall 12 is constructed with a first drain channel 811 and a second drain channel 812, with the first evaporator 31 located above the first drain channel 811 and the second evaporator 32 located above the second drain channel 812. This ensures that each evaporator 3 can drain water. Optionally, both the first drain channel 811 and the second drain channel 812 are connected to the drain outlet 37. That is, multiple fan drain channels 81 and multiple evaporator drain channels 82 are connected to a single drain outlet 37, allowing the defrosting water from the evaporators 3 and the fan 8 to collect and flow out.

[0110] Optionally, the first drainage channel 811 and the second drainage channel 812 are symmetrically arranged about the drain outlet 37, so that the drainage of the first fan 84 and the second fan 85 can be synchronized, which facilitates operation. The first drainage channel 811 is also symmetrically arranged about the drain outlet 37. Optionally, the evaporation drainage channel 82 corresponding to the first evaporator 31 and the evaporation drainage channel 82 corresponding to the second evaporator 32 are also symmetrically arranged about the drain outlet 37.

[0111] Optionally, the bottom wall 12 is also partially recessed to form a transition drainage channel 83. The transition drainage channel 83 is located between the first evaporator 31 and the second evaporator 32, and the extension direction of the transition drainage channel 83 intersects the line connecting the first evaporator 31 and the second evaporator 32. The drain outlet 37 is located at the lowest point of the transition drainage channel 83.

[0112] In this embodiment, the transition drainage channel 83 allows water around the drain outlet 37 to flow to the drain outlet 37 for easy discharge. Moreover, the transition drainage channel 83 is connected to the outlet of the evaporation drainage channel 82, so that some of the defrosting water flowing out of the evaporation drainage channel 82 can first flow into the transition drainage channel 83 and then flow to the drain outlet 37, thus preventing water from overflowing from the evaporation drainage channel 82 to other locations.

[0113] Optionally, when the bottom wall 12 forms a step 115, the fan 8 is higher than the top wall of the step 115, so that the step 115 will not block the airflow in the evaporator cavity 132 to the fan 8, thus ensuring the airflow in the air supply duct 116.

[0114] It can be understood that when the evaporator 3 is located above the step 115, the top wall of the step 115 can be regarded as the bottom wall 12 of the evaporator cavity 132, and is part of the bottom wall 12. Therefore, the technical features of the evaporator cavity 132 in this application also apply to the top wall of the step 115. Therefore, this application will not elaborate on the technical features of the top wall of the step 115 when the evaporator 3 is located on the step 115.

[0115] In other alternative embodiments, such as Figure 9 As shown, the first heating wire 35 is at least partially located on the side of the fan drain channel 81 away from the internal space 13. Here, the first heating wire 35 is located on the back of the fan drain channel 81 to facilitate increasing the temperature of the fan drain channel 81, preventing the defrost water from freezing again during the flow process, and increasing the flow rate of the defrost water.

[0116] Optionally, the first heating wire 35 is matched with the fan drain channel 81. Here, "matching" means that the shape and size of the first heating wire 35 are the same as or similar to those of the fan drain channel 81. This further enhances the heating effect of the fan drain channel 81, thereby improving the defrosting efficiency of the fan 8. Additionally, since the fan drain channel 81 is located below the evaporator 3, the first heating wire 35 can also heat the evaporator 3, improving its defrosting efficiency.

[0117] Optionally, the first heating wire 35 on the back of the fan drain channel 81 is also bent, and the density of the first heating wire 35 first decreases and then increases along the direction from the fan 8 to the drain outlet 37.

[0118] In this embodiment, the density of the first heating wire 35 near the fan 8 is relatively high, which improves the defrosting efficiency of the fan 8. The density is further increased near the drain outlet 37 to prevent defrosting water from freezing and clogging at the drain outlet 37, thereby improving the drainage efficiency of the defrosting water.

[0119] Optionally, the freezer includes a first fan 84 and a second fan 85. The fan drainage channel 81 includes a first drainage channel 811 and a second drainage channel 812. The first drainage channel 811 and the second drainage channel 812 are arranged in the direction from the first fan 84 to the second fan 85, and a drain outlet 37 is provided at the connection between the first drainage channel 811 and the second drainage channel 812 so that the water in the first drainage channel 811 and the second drainage channel 812 flows out through the drain outlet 37. The first heating wire 35 includes a third heating section 353 and a fourth heating section 354. The third heating section 353 is located on the side of the first drainage channel 811 away from the internal space 13. The third heating section 353 extends from the bottom of the first fan 84 to the drain outlet 37 and matches the first drainage channel 811. The fourth heating section 354 is located on the side of the second drainage channel 812 away from the internal space 13 and matches the second drainage channel 812. The third heating section 353 and the fourth heating section 354 are an integral structure.

[0120] In this embodiment, when the freezer is equipped with two fans 8, two fan drainage channels 81 are required for drainage. Each fan drainage channel 81 is provided with a first heating wire 35 on the side away from the internal space 13 to ensure the defrosting efficiency of each fan 8 and the smooth drainage of each fan drainage channel 81.

[0121] Optionally, the first heating wire 35 also includes a fifth heating section 355, which is located on the side of the transition drainage channel 83 away from the internal space 13 and is matched with the transition drainage channel 83.

[0122] In this embodiment, the fifth heating section 355 can heat the transition drainage channel 83 to prevent the water in the transition drainage channel 83 from freezing and clogging, thereby increasing the flow rate of the water in the transition drainage channel 83. This further increases the density of heating wires around the drain outlet 37, thereby ensuring that the defrosting water flowing to the drain outlet 37 will not freeze, so that it can flow out of the drain outlet 37 quickly and smoothly.

[0123] Optionally, the third heating section 353, the fourth heating section 354, and the fifth heating section 355 can be an integral structure, that is, the heating wire is a single piece, in order to improve the ease of manufacturing the heating wire and save costs.

[0124] Optionally, at least one of the third heating section 353, the fourth heating section 354, and the fifth heating section 355 is independent, which facilitates individual control of defrosting of the corresponding area or component.

[0125] Optionally, the freezer also includes a drain pipe connected to a drain outlet 37 for draining defrost water from the drain outlet 37. The freezer also includes a second heating wire 36, which is wound around the outside of the drain pipe. The second heating wire 36 is either integral with the first heating wire 35 or separate from the first heating wire 35.

[0126] In this embodiment, a second heating wire 36 is wound around the outside of the drain pipe, which can increase the temperature of the drain pipe, thereby ensuring smooth drainage, preventing the water in the drain pipe from freezing, and improving defrosting efficiency.

[0127] The second heating wire 36 and the first heating wire 35 are integrated into one piece, which facilitates the production and processing of the heating wire, as shown in Figure 9. Optionally, the second heating wire 36 and the first heating wire 35 can also be separated. When the first heating wire 35 includes a first heating section 351 and a second heating section 352, the second heating wire 36 is far from the first heating wire 35, and the second heating wire 36 can be set independently.

[0128] For example, such as Figure 2 As shown, the flow area of ​​the fan drainage channel 81 gradually decreases along the direction from the fan 8 to the drain outlet 37, and the first heating wire 35 also gradually narrows along the direction from the fan 8 to the drain outlet 37.

[0129] The freezer also includes a condenser, a compressor 96, a capillary tube 4, and a return pipe 43. The capillary tube 4 connects the outlet of the condenser and the inlet of the evaporator 3, and the return pipe 43 connects the outlet of the evaporator 3 and the inlet of the compressor 96.

[0130] Optionally, such as Figure 12 As shown, the freezer includes a return air pipe assembly. When there are multiple evaporators 3, they are connected in series. This reduces the amount of piping required for the return air pipe 43 and capillary tube 4. Specifically, the first evaporator 31 and the second evaporator 32 are connected in series. This allows for unified temperature control of the first evaporator 31 and the second evaporator 32, ensuring that the airflow temperatures from the two air supply ducts 116 are similar or identical.

[0131] Optionally, the freezer also includes a first return pipe 431, a connecting pipe 39, and a first capillary tube 41. The first return pipe 431 connects the inlet of the compressor 96 to the outlet of the first evaporator 31. The connecting pipe 39 connects the outlet of the first evaporator 31 to the inlet of the second evaporator 32. The first capillary tube 41 connects the outlet of the condenser to the inlet of the second evaporator 32. Here, the refrigerant flowing out of the condenser flows into the evaporator 3 through the first capillary tube 41, evaporates in the evaporator 3, and then flows into the compressor 96 through the first regenerative pipe. The compressor 96 compresses the refrigerant into a high-temperature, high-pressure gas before it flows back into the condenser. The first capillary tube 41 and the first regenerative pipe establish a flow loop for the refrigerant in the two evaporators 3.

[0132] Optionally, the connecting pipe 39 is abutted against the bottom wall 12; specifically, the connecting pipe 39 is abutted against or close to the bottom wall 12. Here, the connecting pipe 39 connects the first evaporator 31 and the second evaporator 32, as shown below. Figure 4 As shown, the connecting pipe 39 is located inside the return air chamber, and the airflow entering from the return air port will pass through the connecting pipe 39. This can reduce the uncertainty of the connecting pipe 39 being suspended in the air and being pulled, and it can also be close to the heating defrosting device of the freezer, such as the heating tube 33 located on the evaporator 3 and the first heating wire 35 located at the bottom of the inner liner 1, so as to facilitate better defrosting of the connecting pipe 39 and the evaporator 3.

[0133] Optionally, the height of the inlet of the first evaporator 31 is greater than the height of the outlet of the first evaporator 31. This facilitates the flow of refrigerant from the first evaporator 31 to the second evaporator 32. Furthermore, the connecting pipe 39 can be mostly positioned close to the bottom wall 12, reducing bends and length, and simplifying installation.

[0134] Optionally, multiple evaporators 3 can be connected in parallel. For example, the first evaporator 31 and the second evaporator 32 can be connected in parallel. This allows each evaporator 3 to be controlled independently, thereby enabling independent control of the outlet air temperature of the two air ducts 116 and avoiding mutual interference between the two evaporators 3.

[0135] Optionally, when the first evaporator 31 and the second evaporator 32 are connected in parallel, the freezer also includes a second return pipe and a second capillary tube. The second return pipe is connected to the inlet of both the first and second evaporators. The second capillary tube is connected to the outlet of both the first and second evaporators. Here, the refrigerant flowing out of the condenser flows through the second capillary tube to the first and second evaporators respectively, and the refrigerant flowing through the first and second evaporators then flows into the second heat recovery pipe and finally into the compressor.

[0136] Optionally, the freezer also includes switches, the number of which is the same as the number of evaporators 3 and they correspond one-to-one, located in the second capillary tube. The switches are used to control the connection between the second capillary tube and the evaporator 3 corresponding to the switch, so that the user can adjust the switches according to their needs, thereby adjusting the opening and closing of each evaporator 3 to meet different air outlet patterns.

[0137] Optionally, the distance between the fan 8 and the bottom of the evaporator cavity 132 is less than the distance between the fan 8 and the upper surface of the inner liner 1. In this embodiment, the height of the fan 8 is reduced, so the height of the evaporator cavity 132 corresponding to the fan 8 can also be reduced, thereby freeing up more upper space and increasing the volume of the inner liner 1.

[0138] Optionally, the return air cover 2 is a one-piece structure to facilitate its production and installation.

[0139] Optionally, such as Figure 15 As shown, the return air cover 2 includes multiple sub-covers, which are detachably connected or spliced ​​together. The detachable or splicable nature of these sub-covers facilitates opening the evaporator chamber 132 for inspection and replacement. Furthermore, it facilitates the storage and placement of the return air cover 2 during the processing, transportation, and disassembly / reassembly of the freezer.

[0140] Optionally, at least two of the multiple sub-covers are detachably connected to the inner liner 1. In this embodiment, the multiple sub-covers are detachably connected to the inner liner 1, which facilitates the removal of the sub-covers and also improves the connection stability of the sub-covers. Specifically, all of the multiple sub-covers may be detachably connected to the inner liner 1, or only some of the sub-covers may be connected to the inner liner 1.

[0141] Optionally, the plurality of sub-covers include a first sub-cover 24, a second sub-cover 25, and a third sub-cover 26. One end of the first sub-cover 24 is connected to the first sidewall 111. One end of the second sub-cover 25 is connected to the second sidewall 112 of the inner liner 1. The second sidewall 112 and the first sidewall 111 are arranged opposite to each other along the width direction of the inner liner 1. The third sub-cover 26 is connected between the other ends of the first sub-cover 24 and the second sub-cover 25. Here, the first sub-cover 24 is connected to the first sidewall 111, and the second sub-cover 25 is connected to the second sidewall 112, so that the first sub-cover 24 and the second sub-cover 25 can be relatively fixed. The third sub-cover 26 is connected between the first sub-cover 24 and the second sub-cover 25, thereby realizing the connection of the three sub-covers.

[0142] Optionally, the first sidewall 111 is provided with a first groove, and one end of the first sub-cover plate 24 is provided with a first protrusion located within the first groove, thereby connecting the first sub-cover plate 24 with the first sidewall 111. Optionally, the second sidewall 112 is provided with a second groove, and one end of the second sub-cover plate 25 is provided with a second protrusion located within the second groove, thereby connecting the second sub-cover plate 25 with the second sidewall 112.

[0143] Optionally, the first sub-cover 24 is sealed to the first sidewall 111, and / or the second sub-cover 25 is sealed to the second sidewall 112. This ensures that the airflow from the evaporator cavity 132 to the fan 8 does not leak. For example, a sealing strip is provided between the first sub-cover 24 and the first sidewall 111, and a sealing strip is also provided between the second sub-cover 25 and the second sidewall 112.

[0144] The inner liner 1 also includes a third side wall 113, which is connected between the first side wall 111 and the second side wall 112. The return air cover 2, together with the third side wall 113, the first side wall 111, the second side wall 112 and the bottom wall 12 of the inner liner 1, forms an evaporator cavity 132. The first sub-cover 24 and / or the second sub-cover 25 are detachably connected to the third side wall 113.

[0145] In this embodiment, the first sidewall 111 and the second sidewall 112 connect and fix the first sub-cover plate 24 and the second sub-cover plate 25 from the width direction of the inner liner 1. The third sidewall 113 is located on the side of the evaporator 3 compartment away from the storage cavity 131. Therefore, the third sidewall 113 connects and fixes the first sub-cover plate 24 and the second sub-cover plate 25 from one side of the length direction of the inner liner 1. This ensures that the return air cover plate 2 is fixed from at least three sides, thereby ensuring the connection stability of the return air cover plate 2 and preventing the return air cover plate 2 from shifting or falling off.

[0146] Optionally, the first sub-cover plate 24 is connected to the third sidewall 113 by a snap-fit ​​connection or a screw connection. The second sub-cover plate 25 is also connected to the third sidewall 113 by a snap-fit ​​connection or a screw connection. For example... Figure 15 As shown, one of the first sub-cover plate 24 and the third side wall 113 is provided with a first buckle, and the other of the first sub-cover plate 24 and the third side wall 113 is provided with a first slot. When the first buckle is located in the first slot, the first sub-cover plate 24 is connected to the third side wall 113. One of the second sub-cover plate 25 and the third side wall 113 is provided with a second buckle, and the other of the second sub-cover plate 25 and the third side wall 113 is provided with a second slot. When the second buckle is located in the second slot, the second sub-cover plate 25 is connected to the third side wall 113. The connection between the first sub-cover plate 24 and the second sub-cover plate 25 and the third side wall 113 restricts the movement of the return air cover 2 in the vertical and horizontal directions.

[0147] Optionally, the other end of the first sub-cover plate 24 is recessed downwards to form a first connecting platform 241, the other end of the second sub-cover plate 25 is recessed downwards to form a second connecting platform 251, and the third sub-cover plate 26 overlaps the first connecting platform 241 and the second connecting platform 251. In this embodiment, the third sub-cover plate 26 overlaps the first connecting platform 241 and the second connecting platform 251, and the third sub-cover plate 26 can press the first sub-cover plate 24 and the second sub-cover plate 25 tightly, further increasing the connection area and connection stability between the three sub-cover plates.

[0148] Optionally, when the return air cover 2 is installed on the step 115, the return air cover 2 and the step 115 are detachably connected. This can further increase the connection stability of the return air cover 2.

[0149] Optionally, the storage cavity 131 and the evaporator cavity 132 are arranged along the length of the inner liner 1. Each sub-cover includes a top plate 271 and a side plate 27, with the top plate 271 located above the step 115. The side plate 27 is connected to one end of the top plate 271 and extends downward, located on the outer side of the side wall 11 of the step 115 facing the storage cavity 131; wherein, the top plate 271 is connected to the third side wall 113, and the side plate 27 is connected to the side wall 11 of the step 115 facing the storage cavity 131. Optionally, the return air cover 2 is an L-shaped cover, which reduces the horizontal space occupied by the return air cover 2 in the internal space 13.

[0150] In this embodiment, the top plate 271 is used to enclose the evaporator cavity 132 with the step 115. The side plate 27 is used to enclose the side of the evaporator cavity 132 on one hand, and on the other hand, the side plate 27 extends downward and connects with the step 115, which can increase the connection stability of the return air cover 2.

[0151] Optionally, the side plate 27 and the step 115 facing the side wall 11 of the storage cavity 131 are connected by screws. Specifically, the first sub-cover plate 24, the second sub-cover plate 25 and the third sub-cover plate 26 are all connected to the step 115 by screws.

[0152] In actual use, first install the first sub-cover plate 24 and the second sub-cover plate 25, aligning the buckle and the position of the gap. Then, press the third sub-cover plate 26 onto the first connecting platform 241 of the first sub-cover plate 24 and the second connecting platform 251 of the second sub-cover plate 25. Then, connect the third sub-cover plate 26 to the inner liner 1 with screws, thus realizing the connection of the three sub-cover plates.

[0153] It should be noted that the number of screw holes and clips or slots in each sub-cover plate can be one or more. This application does not make a specific limitation here. The number and position of screw holes and clips or slots can be set according to the requirements.

[0154] Optionally, the third sub-cover 26 is provided with a return air vent. Since the third sub-cover 26 is connected between the first sub-cover 24 and the second sub-cover 25, the return air vent is located on the third sub-cover 26, which facilitates the return of air from the middle of the return air cover 2.

[0155] Optionally, the third sub-cover 26 corresponds to the return air cavity. This can be understood as the third sub-cover 26 and the top wall of the step 115 enclosing the return air cavity. Thus, when cleaning the return air cavity or return air inlet is required, or when maintenance of the evaporator 3 is needed, only the third sub-cover 26 needs to be opened. Furthermore, since the third sub-cover 26 of this application overlaps the first sub-cover 24 and the second sub-cover 25, the removal of the first sub-cover 24 will not affect the first sub-cover 24 and the second sub-cover 25.

[0156] like Figure 15 As shown, the top of the third sub-cover 26 is provided with a first return air vent 21, and the side of the third sub-cover 26 facing the storage cavity 131 is provided with a second return air vent 22. The third sub-cover 26 and the side wall 11 of the step 115 facing the storage cavity 131 enclose a third return air vent 23, which is located at the bottom of the third sub-cover 26. The first return air vent 21, the second return air vent 22, and the third return air vent 23 are all connected to the return air cavity. This increases the return air volume, ensures the flow of refrigerant gas for heat exchange with the evaporator 3, and thus improves the cooling effect of the freezer.

[0157] Optionally, such as Figure 6 As shown, the freezer also includes a foam board 6, which is located inside the evaporator cavity 132 and above the evaporator 3. The foam board 6 is detachably connected to the return air cover 2. Here, the foam is used to insulate the area above the evaporator 3 to prevent the loss of cold air from the evaporator 3, thereby ensuring the heat exchange effect between the airflow and the evaporator 3.

[0158] Optionally, one of the return air cover 2 and the foam board 6 is provided with a third buckle, and the other of the return air cover 2 and the foam board 6 is provided with a third slot. When the third buckle is located in the third slot, the return air cover 2 and the foam board 6 are connected. Figure 6As shown, the foam board 6 is recessed inward to form a third groove, and the return air cover 2 is provided with a third buckle. The third buckle is located in the third groove, and the third buckle protrudes towards the third groove to form an abutment plate. The upper end face of the abutment plate can abut against the lower end face of the foam board 6, so that the foam board 6 can be connected to the return air cover 2 as a whole. This allows the return air cover 2 and the foam board 6 to be installed as a whole on the evaporator 3 and the inner liner 1. Optionally, there are multiple third buckles. Some of the third buckles are located at the end of the return air cover 2 facing the third side wall 113, and some of the third buckles are spaced apart along the end of the return air cover 2 facing the first side wall 111. The number of third grooves and third buckles is the same and corresponds one-to-one. This can increase the connection stability between the return air cover 2 and the foam board 6, and will not interfere with other connecting parts. Optionally, the foam board 6 can be matched with the return air cover 2, and a third clip can also be provided on the end face of the side plate 27 facing the foam board 6. This allows both ends of the return air cover 2 and the foam board 6 to be connected, thereby improving the stability of the connection. It should be noted that the return air cover 2 can also be connected to the foam board 6 in other ways, such as screws, magnets, adhesives, etc., which will not be described in detail here.

[0159] Optionally, at least one sub-cover plate is detachably connected to the foam board 6. Specifically, the first sub-cover plate 24 is detachably connected to the foam board 6, and / or the second sub-cover plate 25 is detachably connected to the foam board 6.

[0160] Optionally, the foam board 6 is attached to at least one side of the evaporator 3, where "attached" means that the foam board 6 is in contact with or close to the evaporator 3. The side of the foam board 6 facing the evaporator 3 is at least partially recessed to form a recessed air duct 61, which connects the return air inlet and the evaporator 3, so that the airflow entering from the return air inlet can flow through the recessed air duct 61 and pass through the evaporator 3.

[0161] In this embodiment, when the return air surface of the evaporator 3 is frosted, the airflow into the evaporator 3 decreases, and the air resistance increases, thus affecting the cooling effect of the freezer. The foam plate 6 of the evaporator 3 is recessed to form a grooved air duct 61. This allows airflow to still enter the evaporator 3 through the grooved air duct 61 even when the return air surface of the evaporator 3 is frosted, thereby ensuring the airflow volume of the evaporator 3. In addition, the grooved air duct 61 can also increase the return air volume of the evaporator 3, improving the cooling effect of the freezer.

[0162] It should be noted that the foam board 6 may not be located above the evaporator 3. The location of the foam board 6 can be selected according to the orientation or position of the evaporator 3.

[0163] Optionally, the evaporator 3 has multiple fins 34 arranged side by side, with a foam board 6 located at one end of each fin 34, and the grooved air duct 61 connected to the gap between adjacent fins 34. In this embodiment, the gap between the grooved air duct 61 and adjacent fins 34 is connected, and the fins 34 do not obstruct the airflow, thus allowing the airflow in the grooved air duct 61 to flow smoothly into the evaporator 3.

[0164] Optionally, the grooved air duct 61 extends along the extension direction of the fins 34, which facilitates the flow of air in the grooved air duct 61 into the evaporator 3. One end of the grooved air duct 61 is open, and the other end of the grooved air duct 61 is closed, so the airflow will not flow away from the grooved air duct 61, but will flow into the evaporator 3 after passing through one end of the grooved air duct 61.

[0165] Optionally, the length of the grooved air duct 61 is less than or equal to the length of the fin 34. This facilitates the closure of the other end of the grooved air duct 61 to avoid airflow loss.

[0166] The evaporator 3 includes an air-facing surface 342, which corresponds to the return air inlet. A recessed air duct 61 is connected to the return air inlet, with one end of the recessed air duct 61 on the same side as the air-facing surface 342, allowing airflow from the return air inlet to enter the recessed air duct 61. Here, the air-facing surface 342 of the evaporator 3 is used to allow the return airflow to flow in, facilitating heat exchange between the airflow and the evaporator 3. One side of the recessed air duct 61 is on the same side as the air-facing surface 342, so that when the air-facing surface 342 becomes frosted and blocked, the airflow can flow into the recessed air duct 61 and then into the evaporator 3, ensuring the cooling effect of the freezer.

[0167] Optionally, the evaporator 3 also includes an evaporator tube 341, which passes through multiple fins 34 in a reciprocating manner. Multiple grooved air ducts 61 are arranged sequentially along the extension direction of the evaporator tube 341.

[0168] In this embodiment, multiple grooved air ducts 61 are arranged along the extension direction of the evaporator tube 341, which can increase the strength of the foam board 6 and ensure that airflow can flow into each grooved air duct 61.

[0169] Optionally, the freezer also includes a heating element 33, which is located between the evaporator 3 and the foam board 6, and the heating element 33 is at least partially located within the recessed air duct 61.

[0170] In this embodiment, the heating tube 33 is used to heat and defrost the evaporator 3. The heating tube 33 is at least partially located in the grooved air duct 61. When the heating tube 33 is working, it can also heat and defrost the wall of the grooved air duct 61 to avoid frost formation in the grooved air duct 61 from affecting the smoothness of airflow.

[0171] Optionally, the heating tube 33 is connected to the end of the fin 34 facing the foam board 6. The fin 34 can fix the heating tube 33 and prevent the heating tube 33 from shifting. The end of the fin 34 facing the foam board 6 is provided with a fourth slot (corresponding to the aforementioned slot 343), and the heating tube 33 is located in the fourth slot. The fourth slot is used to fix and limit the heating tube 33.

[0172] Optionally, the heating tube 33 extends in the same direction as the evaporator tube 341, and the heating tube 33 is also curved, which can increase the contact area between the heating tube 33 and the evaporator 3 and improve the defrosting effect.

[0173] Optionally, such as Figure 14 As shown, the freezer also includes a heat-conducting plate 62, which is located between the heating tube 33 and the foam board 6, and is used to transfer the heat from the heating tube 33. Here, the heat-conducting plate 62 is used to evenly transfer the heat from the heating tube 33 to the entire evaporator 3, so as to improve the defrosting uniformity of the evaporator 3.

[0174] Optionally, the heat-conducting plate 62 is placed in contact with the heating tube 33 to improve the heat transfer capacity of the heat-conducting plate 62 to the heating tube 33.

[0175] Optionally, the heat-conducting plate 62 has a vent 63, which connects the grooved air duct 61 and the evaporator 3 to facilitate airflow within the grooved air duct 61 and the evaporator 3. In this embodiment, the vent 63 facilitates the flow of airflow from the grooved air duct 61 into the evaporator 3, preventing the heat-conducting plate 62 from obstructing the airflow.

[0176] Optionally, the vent 63 and the heating pipe 33 are staggered. That is, the heating pipe 33 is not installed below the vent 63, which ensures both ventilation and airflow.

[0177] Optionally, the heat-conducting plate 62 is movably connected to the evaporator 3. In this embodiment, the heat-conducting plate 62 can be removed from or installed on the evaporator 3. During use, the installation of the heat-conducting plate 62 can be selected based on the arrangement density of the heating tubes 33 or the airflow rate of the evaporator 3. When the density of the heating tubes 33 is high, installing the heat-conducting plate 62 can prevent the heating tubes 33 from directly contacting the foam board 6, thus avoiding localized overheating and damage to the foam board 6. When the distribution density of the heating tubes 33 is low, the heating tubes 33 will not damage the foam board 6, and the heat-conducting plate 62 can be omitted.

[0178] Specifically, the heat-conducting plate 62 has inserts on the side facing the fins 34. These inserts can be inserted between adjacent fins 34, and they restrict the movement of the heat-conducting plate 62 along the arrangement direction of the multiple fins 34. The inserts have recesses, and the heating tube 33 is located within these recesses. These recesses restrict the movement of the heat-conducting plate 62 along the extension direction of the fins 34, thus enabling the heat-conducting plate 62 to move along the end face of the evaporator 3. Optionally, multiple inserts are provided, spaced apart circumferentially along the heat-conducting plate 62, to increase the connection stability between the heat-conducting plate 62 and the evaporator 3.

[0179] Optionally, along the extending direction of the fins 34, the ratio of the length of the grooved air duct 61 to the length of the foam board 6 ranges from one-third to one-half. For example, when the heat-conducting plate 62 is provided, the ratio of the length of the grooved air duct 61 to the length of the foam board 6 can be 1:2. This allows for a larger length of the grooved air duct 61, reducing the impact of the heat-conducting plate 62 and ensuring sufficient airflow. When the heat-conducting plate 62 is not provided, the ratio of the length of the grooved air duct 61 to the length of the foam board 6 can be 1:3. Since there is no obstruction from the heat-conducting plate 62, reducing the length of the grooved air duct 61 also ensures sufficient airflow.

[0180] Optionally, such as Figure 17 As shown, the sidewall 11 includes a sidewall body 114 and an air duct cover 5. The air duct cover 5 is located on the side of the sidewall body 114 facing the internal space 13. The air duct cover 5 and the sidewall body 114 together enclose an air supply duct 116. The air duct cover 5 is constructed with multiple air outlets 117. The multiple air outlets 117 are arranged sequentially at intervals along the extension direction of the air supply duct 116. The fan 8 is connected to the air supply duct 116 and is used to drive the airflow to flow in the air supply duct 116.

[0181] In this embodiment, the airflow from the air supply duct 116 flows into the internal space 13 through the air outlet 117 of the duct cover 5. Multiple air outlets 117 are arranged along the extension direction of the air supply duct 116, which increases the air volume of the air outlets 117, thereby increasing the airflow into the internal space 13 and improving the cooling effect of the freezer.

[0182] Optionally, the side wall body 114 is recessed in the direction away from the internal space 13 to form an air supply duct 55, and the air duct cover 5 is installed on the side of the air supply duct 55 facing the internal space 13. The air duct cover 5 includes multiple sub-air duct cover 5, and the multiple sub-air duct cover 5 can be detachably connected or spliced ​​together.

[0183] In this embodiment, the duct cover 5 covers the side of the air supply duct 55 facing the internal space 13, so that airflow can flow into the internal space 13 through the air supply port 117 of the duct cover 5. The duct cover 5 is formed by connecting multiple sub-duct cover plates 5, which facilitates the disassembly and installation of the duct cover 5, and thus facilitates the inspection and cleaning of the air supply duct 55 and / or the air supply port 117. It should be noted that: in some optional embodiments, the duct cover 5 can also be provided with a return air port, through which the airflow of the storage cavity 131 can flow into the air supply duct 55. Such a duct cover 5 can also include multiple sub-duct cover plates 5, and the multiple sub-duct cover plates 5 can be detachably connected or spliced ​​together. Moreover, in this embodiment, even if a single sub-duct cover plate 5 is deformed and damaged, only the single sub-duct cover plate 5 needs to be replaced, instead of replacing the entire duct cover 5, which can save costs and facilitate maintenance.

[0184] Optionally, such as Figure 17 As shown, the duct cover 5 is detachably connected to the side wall body 114.

[0185] In this embodiment, the duct cover 5 can also be detachably connected to the side wall body 114, so that the duct cover 5 can be removed to clean the air supply slot 55 and the air outlet (air supply outlet 117 or return air outlet).

[0186] Optionally, one of the duct cover 5 and the side wall body 114 is provided with a buckle (hereinafter referred to as the fifth buckle 535 for easy distinction), and the other of the duct cover 5 and the side wall body 114 is provided with a groove adapted to the buckle (hereinafter referred to as the fifth groove for easy distinction). When the fifth buckle 535 is located in the fifth groove, the duct cover 5 and the side wall body 114 are connected. In this embodiment, the duct cover 5 and the side wall body 114 are connected by the fifth buckle 535 and the fifth groove, which has a simple structure, is easy to operate and process, and has a low cost.

[0187] Optionally, the plurality of sub-duct covers 5 include a first sub-duct cover 53 and a second sub-duct cover 532. One end of the first sub-duct cover 53 is configured with one of a plug-in plate 533 and a plug-in groove 534, and one end of the second sub-duct cover 532 is configured with the other of a plug-in plate 533 and a plug-in groove 534. The plug-in groove 534 is adapted to the plug-in plate 533. When the plug-in plate 533 is located in the plug-in groove 534, the first sub-duct cover 53 and the second sub-duct cover 532 are connected. In this embodiment, two adjacent sub-duct covers 5 are connected by a plug-in plate 533 and a plug-in groove 534, which facilitates installation and disassembly.

[0188] Optionally, the air supply duct 55 includes a fan duct 552 and an air outlet duct 551. The fan duct 552 is used to house the fan 8. There are multiple air outlet ducts 551, each of which is connected to a fan duct 552. The multiple air outlet ducts 551 are arranged at intervals along the height direction of the side wall 11. The first sub-duct cover plate 53 is at least partially covered on the side of the fan duct 552 facing the internal space 13. The number of second sub-duct cover plates 532 is the same as the number of air outlet ducts 551 and they correspond one-to-one. Each first sub-duct cover plate 53 is connected to multiple second sub-duct cover plates 532.

[0189] In this embodiment, the fan slot 552 is used to house the fan 8. One fan slot 552 is connected to multiple air outlet slots 551, so that the air outlet of the fan 8 can flow to multiple air outlet slots 551 simultaneously, realizing the air supply of multiple air supply ducts 116. The first sub-air duct cover plate 53 is at least partially covered by the fan slot 552 to cover the fan 8. That is, the first sub-air duct cover plate 53 and the side wall body 114 form an air supply cavity, and the fan 8 is located in the air supply cavity. The second sub-air duct cover plate 532 is covered on the side of each air outlet slot 551 facing the internal space 13 to facilitate the air outlet of each side air supply duct 116.

[0190] Optionally, when there are multiple air supply ducts 116, the fan 8 is located on the same side of the multiple air supply ducts 116, such as... Figure 9 and Figure 10 As shown, the fan 8 includes an impeller 77 and a volute 7. The impeller 77 is located inside the volute 7. The volute 7 is constructed with multiple air outlets, and the number of air outlets is the same as that of the air supply duct 116 and they correspond one-to-one.

[0191] In this embodiment, multiple air supply ducts 116 share a single fan 8, and the fan 8 is located on the same side of the multiple air supply ducts 116. The volute 7 of the fan 8 is provided with an air outlet corresponding to the air supply duct 116, so that the air outlet of the fan 8 can flow to multiple ducts on the same side at the same time, so as to ensure the air flow of each air supply duct 116.

[0192] Optionally, when multiple air supply ducts 116 are provided on the same side wall 11, the multiple air supply ducts 116 include a third air supply duct 1163 and a fourth air supply duct 1164. The fan 8 includes a base plate 71, a first shell wall 73, and a second shell wall 74. The first shell wall 73 is connected to one end of the base plate 71; the second shell wall 74 is connected to the other end of the base plate 71 and is arranged opposite to the first shell wall 73. The base plate 71, the second shell wall 74, and the first shell wall 73 enclose a receiving cavity with an open side. The impeller 77 is located in the receiving cavity, and the open side is used for air intake. The fan 8 also includes a volute cover plate 72, which covers the open side of the receiving cavity. The volute cover plate 72 and the receiving cavity enclose a fan cavity, and the volute cover plate 72 has an air inlet 58. The fan cavity is used to house the impeller 77. The first shell wall 73 and the second shell wall 74 define a first air outlet 78 and a second air outlet 79. The first air outlet 78 is connected to the third air supply duct 1163, and the second air outlet 79 is adapted to be connected to the fourth air supply duct 1164. The plurality of air outlets include the first air outlet 78 and the second air outlet 79.

[0193] In this embodiment, the first air outlet 78 and the second air outlet 79 are respectively connected to the third air supply duct 1163 and the fourth air supply duct 1164, and are used for a fan 8 to supply air to the third air supply duct 1163 and the fourth air supply duct 1164.

[0194] Optionally, the volute cover 72 of this application can be set independently or integrated with the fan cover. That is, the volute cover 72 and the fan cover are integrated into one. The volute cover 72 can cover the opening of the receiving cavity or the side of the fan duct 552 facing the internal space 13, and the volute cover 72 has an air inlet 58 that communicates with the internal space 13. This eliminates the need for a separate fan cover or volute cover 72, which facilitates installation, saves costs, improves production efficiency, and eliminates the need for sealing foam to seal the interface between the volute 7 and the air supply duct 116, resulting in good sealing performance. When the volute cover 72 and the fan cover are integrated, the characteristics of the fan cover also apply to the volute cover 72, and vice versa.

[0195] Optionally, when the volute cover 72 and the fan cover are combined into one, it can be understood that the volute cover 72 and the first sub-duct cover 53 are combined into one, with the first sub-duct cover 53 located on the side of the volute 7 facing the internal space 13. The volute 7 and the first sub-duct cover 53 together enclose the fan cavity; the fan 8 is located inside the fan cavity. Specifically, the volute 7 and the first sub-duct cover 53 can be detachably connected or fixedly connected. The side of the first sub-duct cover 53 facing the fan slot 552 has a wall section that matches the volute 7, enabling the connection between the first sub-duct cover 53 and the volute 7 and ensuring sealing.

[0196] Optionally, such as Figure 18 As shown, the freezer also includes a baffle 56, which is located inside the air supply duct 116 and is located on one side of at least one air outlet 117. The air outlet 117 and the baffle 56 are arranged sequentially along the airflow direction.

[0197] In this embodiment, the air outlet 117 and the baffle 56 are arranged sequentially along the airflow direction. This can be understood as follows: the baffle 56 is located on the side of the air outlet 117 away from the fan 8. This allows the baffle 56 to block part of the airflow, causing the airflow to bounce back and form a vortex after impacting the baffle 56. The airflow within the vortex then flows back into the air outlet 117, thus increasing the airflow in the weaker airflow area at the end of the air outlet 117 away from the fan 8. The baffle 56 improves the uniformity of airflow from the air outlet 117, thereby improving the uniformity of airflow from the freezer.

[0198] Optionally, the wind baffle 56 is provided on the side of the air duct cover 5 facing the air supply duct 116, and the wind baffle 56 protrudes from the air duct cover 5. When there are multiple wind baffles 56, each wind baffle 56 corresponds to an air outlet 117. Along the flow direction of the airflow in the air supply duct 116, the height of the multiple wind baffles 56 protruding from the air duct cover 5 gradually increases.

[0199] Optionally, such as Figure 19 As shown, the duct cover 5 includes a cover body 51 and an air guide structure 52. The cover body 51 has an air outlet 117. The air guide structure 52 is located inside the air outlet 117 and has multiple air holes 521 arranged in a honeycomb pattern. Along the airflow direction within the air duct 116, the height of the air guide structure 52 gradually increases on the side facing the air duct 116.

[0200] In this embodiment, an air guide structure 52 is provided inside the air outlet 117. The air guide structure 52 can guide the airflow out of the air outlet 117, making the airflow out of the air outlet 117 controllable. The side of the air guide structure 52 facing the air supply duct 116 gradually increases in height along the airflow direction. This increases the resistance at the end of the air outlet 117, reducing the airflow velocity and preventing excessively high airflow velocity from some air outlets 521, thus avoiding air recirculation in some air outlets 521. This makes the airflow from the air outlet 117 more uniform. In addition, multiple honeycomb-shaped air outlets 521 can evenly divide the cold air into many smaller cold air streams when passing through the air outlet 117. Not only is the flow rate of each cold air stream smaller, but the airflow is also more uniform, ensuring a more uniform temperature in all parts of the freezer. The honeycomb-shaped air outlet 521 has a strong directional air outlet capability, allowing air to be delivered to a greater distance along the direction of the air outlet 117.

[0201] Optionally, such as Figure 17 As shown, the freezer is also equipped with an anti-blocking device. For ease of description, the air supply vents and return vents that connect the ventilation duct and the internal space 13 are collectively referred to as air vents. The air vents are equipped with anti-blocking devices. Optionally, the anti-blocking device includes grilles, which are located at the air vents, and there are multiple grilles.

[0202] Optionally, the air vent includes a first air vent, which connects to a first air duct and the internal space 13. The first air vent can be an air supply vent 117. The first air duct refers to the air duct defined by the side wall 11, such as the air supply duct 116 of this application, or it can refer to other forms of air duct, such as a return air duct set in the side wall 11, which is also an optional embodiment applicable to the anti-blocking device of this application.

[0203] Optionally, the plurality of grilles includes a first grille 1174 and a second grille 1175. The plurality of first grilles 1174 are spaced apart on the side of the first air vent facing the interior space 13, and the first grilles 1174 protrude from the sidewall 11. The second grilles 1175 are intersecting with the first grilles 1174, and the grilles are located on the side of the first grilles 1174 facing the interior space 13, and the second grilles 1175 protrude from the first grilles 1174.

[0204] In this embodiment, the first grille 1174 protrudes from the side wall 11 and is located on the side of the first air vent facing the internal space 13. This prevents items placed in the internal space 13 from clogging the first air vent and also prevents foreign objects from falling into the first air vent. The second grille 1175 intersects with the first grille 1174 and protrudes from the first grille 1174. The second grille 1175 protrudes further, and the air outlet of the first air vent is not on the same plane, thus preventing the first air vent from being completely blocked.

[0205] In this embodiment, the baffle ribs 56 are located on the air duct cover plate 5 and are stepped along the airflow direction. This causes the airflow volume of the air outlet 117 to gradually decrease as the airflow direction changes. The baffle ribs 56 corresponding to the upstream air outlets 117 with larger airflow volumes are lower in height, resulting in smaller vortices and more uniform airflow from the air outlets 117. Conversely, the baffle ribs 56 corresponding to the downstream air outlets 117 with smaller airflow volumes are higher in height, resulting in larger vortices that block more airflow, thus reducing the airflow volume of the downstream air outlets 117. In this embodiment, the stepped baffle ribs 56 ensure more uniform airflow from the multiple air outlets 117 positioned along the airflow direction, increasing the airflow volume even from outlets 117 far from the fan 8 and guaranteeing uniform airflow from the freezer. In particular, when the air supply duct 116 extends along the length of the inner liner 1 and the fan 8 is located on one side of the air supply duct 116, the air supply duct 116 is relatively long, and the setting of the wind baffle 56 can effectively increase the uniformity of air outlet.

[0206] The foregoing description and accompanying drawings fully illustrate embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. Embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A freezer, characterized in that, The freezer is a horizontal freezer, and includes: The inner liner encloses the internal space and defines an air duct with an air outlet; The return air cover is located inside the inner liner and divides the internal space into a storage cavity and an evaporator cavity. The inlet of the air supply duct is connected to the outlet of the evaporator cavity, and the inlet of the evaporator cavity is connected to the storage cavity, so that the airflow from the air supply outlet flows through the storage cavity and then into the evaporator cavity. The return air cover is provided with a return air inlet. A plurality of evaporators are located within an evaporator cavity; the evaporator cavity extends along the width direction of the inner liner; at least two of the plurality of evaporators include a first evaporator and a second evaporator, the second evaporator and the first evaporator being spaced apart along the width direction of the inner liner; A fan is connected to the air supply duct. The fan can drive the airflow through the evaporator cavity, the air supply duct and the storage cavity, and then back to the evaporator cavity through the return air port.

2. The freezer according to claim 1, characterized in that, The inner liner includes: The bottom wall has a drain outlet located above the first evaporator and the second evaporator. The drain outlet is used to drain the defrost water from the first evaporator and the second evaporator.

3. The freezer according to claim 2, characterized in that, The first evaporator and / or the second evaporator are inclined toward the drain outlet to facilitate the outflow of defrost water.

4. The freezer according to claim 1, characterized in that, The first evaporator and the second evaporator are connected in series.

5. The freezer according to claim 4, characterized in that, Also includes: The first return pipe is connected to the outlet of the first evaporator; A connecting pipe connects the outlet of the first evaporator and the inlet of the second evaporator; The first capillary tube is connected to the inlet of the second evaporator.

6. The freezer according to claim 5, characterized in that, The connecting pipe is in contact with the bottom wall of the evaporator cavity; and / or, The height of the inlet of the first evaporator is greater than the height of the outlet of the first evaporator.

7. The freezer according to claim 1, characterized in that, The first evaporator and the second evaporator are connected in parallel.

8. The freezer according to claim 7, characterized in that, Also includes: The second return pipe is connected to both the inlet of the first evaporator and the inlet of the second evaporator. The second capillary tube is connected to both the outlet of the first evaporator and the outlet of the second evaporator.

9. The freezer according to claim 1, characterized in that, The fan and the air supply duct are located within the same side wall of the inner liner; and / or, The number of air supply ducts may be one or more. When the number of air supply ducts is multiple, the multiple air supply ducts are arranged at intervals along the height direction of the side wall of the inner liner; and / or, The number of evaporators is the same as the number of fans and corresponds one-to-one; and / or, The inner liner's sidewall includes a sidewall body and an air duct cover. The sidewall body is recessed in the direction away from the internal space to form an air supply groove, and the air duct cover is placed on the side of the air supply groove facing the internal space.

10. The freezer according to any one of claims 1 to 9, characterized in that, The inner liner includes: The first sidewall defines a first air supply duct with a first air supply outlet; The second sidewall is disposed opposite to the first sidewall and defines a second air supply duct with a second air supply outlet. The first evaporator is connected to the first air supply duct, and the second evaporator is connected to the second air supply duct.

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