Refrigerator with air cooling function

Abstract

The technical scheme belongs to the technical field of refrigerators and specifically relates to a refrigerator with air cooling function, which comprises a cabinet body with a containing cavity with an upward cavity opening; a cover body device installed on the upper end of the cabinet body; an air cooling device installed in the cabinet body; a refrigeration circulation device installed in the cabinet body; the air cooling device comprises a air supply channel and a fan, the air supply channel is horizontally arranged on the inner wall of the upper half of the cabinet body, and the air outlet of the air supply channel is located on the inner wall of the length side of the cabinet body; the air outlet of the air supply channel is arranged on the inner wall of the length side of the cabinet body, and the air outlet is communicated with the containing cavity; so that the cold air can be blown out along the width direction of the cabinet body, the physical obstruction of the middle beam is avoided in the spatial layout, the problem that the middle beam hinders the flow of cold air and causes the local temperature difference in the cabinet body is solved, the local air flow accumulation or flow dead angle is avoided, and the air cooling refrigeration effect in the refrigerator and the uniform temperature in each corner are ensured.

Description

Technical Field

[0001] This technical solution relates to the field of freezer technology, specifically to a freezer with air-cooling function. Background Technology

[0002] During use, frequent opening and closing of the cabinet door causes frost to form on the side wall near the opening due to temperature changes. To alleviate this problem, the industry often adopts solutions such as adding air-cooling function or directly converting to air-cooled freezers. For example, Chinese Patent CN202223076734.7 discloses an air-cooled freezer that achieves internal air circulation. It blows cold air out through the cold air outlet at the top of the refrigeration unit, and then guides the cold air to the other side of the cabinet through the guide groove on the top surface of the cabinet body, thereby achieving cold air circulation. However, when such air-cooling solutions are applied to freezers with multiple doors, such as those disclosed in Chinese Patent CN202220607458.3 and Chinese Patent CN202021772314.0 regarding a central beam insulation structure and freezer, the following problems exist: These freezers are equipped with a central beam, the lower end of which protrudes from the lower end of the door. This central beam directly obstructs the flow of cold air inside the freezer, ultimately resulting in a weakened air-cooling effect and uneven temperature distribution on both sides, affecting the overall cooling performance. Utility Model Content

[0003] The purpose of this technical solution is to provide a freezer with air-cooling function. The air supply channel is horizontally set on the inner wall of the upper half of the cabinet. The air outlet of the air supply channel is located on the inner wall of the long side of the cabinet, and the air outlet of the air supply channel is connected to the interior of the receiving cavity. That is, cold air is blown out through the long side of the cabinet, avoiding the central beam from blocking the airflow. This improves the problems of poor air-cooling effect, uneven temperature on both sides of the cabinet and low cooling efficiency caused by the presence of a central beam in the freezer.

[0004] The purpose of this technical solution is achieved as follows: A freezer with air-cooling function includes: The cabinet has an accommodating cavity with its opening facing upwards; A cover device, which is installed on the upper end of the cabinet, is used to seal the receiving cavity; An air-cooling device is installed inside the cabinet to supply air and cool the upper part of the receiving cavity. A refrigeration circulation device, installed inside the cabinet, is used to cool the lower half of the receiving cavity; The air-cooling device includes: An air supply channel is horizontally arranged on the inner wall of the upper half of the cabinet. The air outlet of the air supply channel is located on the inner wall of the long side of the cabinet, and the air outlet of the air supply channel is connected to the interior of the receiving cavity. A fan is installed on the side wall of the cabinet and is connected to the air supply channel and the refrigeration zone of the refrigeration cycle device, for delivering cold air from the refrigeration zone to the receiving cavity through the air supply channel.

[0005] Preferably, the air supply channel has several air supply ducts, each air supply duct having an air inlet and an air outlet. The several air outlets are arranged sequentially on the inner wall of the upper half of the cabinet, and the distance between them and the fan gradually increases. The cross-sectional area of ​​the air inlet of the air supply duct to which the air outlet near the fan belongs is smaller than the cross-sectional area of ​​the air inlet of the air supply duct to which the air outlet far from the fan belongs.

[0006] Preferably, the plurality of said air supply ducts include at least: A duct has an air inlet and at least one air outlet, the air inlet being connected to the fan. Air duct two, which has two air inlets and at least one air outlet, wherein the two air inlets are connected to the fan; Wherein, the cross-sectional area of ​​the first air inlet is smaller than that of the second air inlet, the air outlets of the first air duct and the second air duct are arranged sequentially on the same inner wall of the long side of the cabinet, and the distance between the air outlet of the first air duct and the fan is smaller than the distance between the air outlet of the second air duct and the fan.

[0007] Preferably, the air outlet is provided in the rear half of the second air duct, and a guide plate is provided in the rear half of the second air duct, the guide plate making the cross-sectional area of ​​the rear half of the second air duct smaller as it moves further away from the fan.

[0008] Preferably, the guide plate is bent toward the air outlet of the second air duct.

[0009] Preferably, the air outlet of the air supply channel is provided with a plurality of horizontal partitions and / or vertical partitions; The transverse partition is inclined toward the opening of the receiving cavity, so that the air outlet of the air supply channel blows out toward the opening of the receiving cavity.

[0010] Preferably, a guide plate is provided at the rear end of the transverse partition located at the lower end of the air outlet of the air supply channel. The guide plate is inclined toward the cavity opening away from the receiving cavity, so as to make the cold air blown out of the air outlet of the air supply channel flow toward the bottom of the receiving cavity.

[0011] Preferably, the vertical partition is inclined in a direction away from the fan.

[0012] Preferably, the cover device includes: Several cover plates are rotatably mounted on the upper end of the cabinet to seal the receiving cavity; The cabinet is provided with at least one central beam, and cover plates are provided on both sides of the central beam. The air outlets of the air supply channel are distributed on both sides of the central beam. The cover plate is provided with a flow guide groove, and the side wall of the flow guide groove is provided with a flow guide arc surface. The flow guide arc surface is used to guide the cold air from the air outlet of the air supply channel from the groove opening to the bottom of the flow guide groove. The bottom of the flow guide channel is provided with several flow guide protrusions, which are parallel to the central beam.

[0013] Preferably, the cabinet is provided with a quick-freezing zone, which is located above the refrigeration zone of the refrigeration cycle device. The fan is located beside the quick-freezing zone, and the fan is provided with a number of air outlets. The fan blows air toward the quick-freezing zone through the air outlets. The air outlets are provided with baffles, which are used to open or close the air outlets.

[0014] The key and beneficial technical effects of this technical solution compared to existing technologies are: 1. This technical solution arranges the air supply channel horizontally on the inner wall of the upper half of the cabinet, and sets the air outlet of the air supply channel on the inner wall of the long side of the cabinet, and the air outlet is connected to the interior of the freezer's cavity; this design allows cold air to blow out along the width of the cabinet, avoiding the physical obstruction of the central beam from a spatial layout perspective, solving the problem of local temperature differences inside the cabinet caused by the central beam obstructing the flow of cold air in the existing technology, avoiding local airflow accumulation or dead corners, and ensuring the air-cooling effect inside the freezer and the temperature uniformity of every corner.

[0015] 2. In this technical solution, the cross-sectional area of ​​the air inlet of the air supply duct near the air outlet of the fan is smaller than the cross-sectional area of ​​the air inlet of the air supply duct far from the air outlet of the fan. That is, the cross-sectional area of ​​the air inlet of the air supply duct further away from the air outlet of the fan is larger. This changes the air volume entering different air supply ducts. The air volume entering the air supply duct near the air outlet of the fan is less than the air volume entering the air supply duct far from the air outlet of the fan, and the air volume entering the air supply duct further away from the air outlet of the fan is larger. This ensures that the wind speed of the cold air blown out from the air outlet of each air supply duct is uniform and constant, and ensures that the temperature in all corners of the cabinet is kept stable and balanced.

[0016] 3. This technical solution uses a guide plate in the rear half of the second air duct to make the cross-sectional area of ​​the rear half of the second air duct smaller as it gets further away from the fan, thereby ensuring that the air velocity blown out from the air outlets at different positions in the second air duct is uniform and constant, thus ensuring the stable and uniform air-cooling effect inside the cabinet.

[0017] 4. This technical solution has several horizontal and / or vertical baffles installed in the air outlet. The horizontal baffles guide the air into the guide channel of the cover plate, and then guide it to the other side of the cabinet through the guide channel to achieve circulation. The vertical baffles guide the air to the side of the cabinet away from the fan, thereby realizing the flow of cold air to every corner of the cabinet and ensuring the cooling effect of air cooling.

[0018] 5. This technical solution includes a quick-freezing zone with several air outlets provided by a fan. These outlets are closer to the cooling zone of the refrigeration cycle unit than the air outlets in the air supply channel, and the quick-freezing zone is located above the cooling zone. This ensures that the temperature in the quick-freezing zone is lower than that in other areas of the cabinet. The fan delivers cold air to the quick-freezing zone to rapidly cool the items within it. The air outlets are equipped with baffles, and by switching on and off different numbers of baffles, the airflow into the quick-freezing zone can be adjusted, thereby regulating the temperature within the quick-freezing zone. This design is convenient and simple to use. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this technical solution.

[0020] Figure 2 This is a partial exploded view of the technical solution.

[0021] Figure 3 This is one of the partial structural schematic diagrams of the air-cooling device and refrigeration cycle device in this technical solution.

[0022] Figure 4 This is the second partial structural schematic diagram of the air-cooling device and refrigeration cycle device in this technical solution.

[0023] Figure 5 This is a partial exploded view of the air-cooling device in this technical solution.

[0024] Figure 6 This is a schematic diagram of the structure of air duct two in this technical solution.

[0025] Figure 7 This is a cross-sectional view of the air supply channel in this technical solution.

[0026] Figure 8 This is a cross-sectional view of the air outlet of this technical solution.

[0027] Figure 9 This is a schematic diagram of the cover device of this technical solution.

[0028] Figure 10 This is a cross-sectional view of the cover plate of this technical solution.

[0029] Figure 11 This is a partial structural diagram of the fan in this technical solution.

[0030] Attached reference numerals: 1. Cabinet body; 11. Receiving cavity; 12. Quick-freezing zone; 13. Divider; 14. Inner liner; 2. Cover device; 21. Cover plate; 22. Central beam; 23. Guide channel; 24. Guide arc surface; 25. Guide protrusion; 3. Air-cooled device; 4. Refrigeration cycle unit; 41. Refrigeration zone; 42. Evaporator; 5. Air supply duct; 52. Air outlet; 53. Air duct one; 531. Air inlet one; 54. Air duct two; 541. Air inlet two; 55. Diverter plate; 56. Baffle; 57. Guide plate; 61. Horizontal partition; 62. Vertical partition; 63. Air guide plate; 7. Fan; 71. Air outlet; 72. Baffle; 73. Exhaust vent. Detailed Implementation

[0031] The specific implementation of this technical solution will be further described in detail below with reference to the accompanying drawings.

[0032] Combination Figures 1-4 A freezer with air-cooling function includes: a cabinet body 1 having a cavity 11 with its opening facing upwards; an inner liner 14 inside the cabinet body 1, with a partition between the inner liner 14 and the cabinet body 1; a cover device 2 installed on the upper end of the cabinet body 1 for sealing the cavity 11; an air-cooling device 3 installed inside the cabinet body 1 for supplying air to cool the upper half of the cavity 11; and a refrigeration circulation device 4 installed inside the cabinet body 1 for cooling the lower half of the cavity 11. The air-cooling device 3 includes: an air supply channel 5, which is horizontally arranged on the inner wall of the upper half of the cabinet 1. The air supply channel 5 has several air outlets 52, which are located on the inner wall of the long side of the cabinet 1 and are connected to the interior of the receiving cavity 11; and a fan 7, which is installed on the side wall of the cabinet 1 and is connected to the air supply channel 5 and the cooling zone 41 of the refrigeration cycle device 4, for delivering cold air in the cooling zone 41 to the receiving cavity 11 through the air supply channel 5.

[0033] Combination Figures 1-4 The central beam 22 of the cabinet 1 is located in the middle of the length side of the cabinet 1 and is perpendicular to the length side of the cabinet 1. Several air outlets 52 are located on the side wall of the length side of the cabinet 1. The cold air blown out of the air outlets 52 flows in the width direction of the cabinet 1. That is, the cold air blown out of the air outlets 52 flows along the length direction of the central beam 22 and will not be blocked or obstructed by the central beam 22, ensuring that the cold air blown out of the air outlets 52 can flow to every corner of the upper part of the cabinet 1.

[0034] Combination Figures 5-7The air supply duct 5 contains several air supply channels, each with an air inlet and an air outlet 52. The air inlet of each air supply channel is connected to a fan to ensure that the fan delivers air to each air supply channel. Several air outlets 52 are arranged sequentially on the inner wall of the upper half of the cabinet 1, with the distance between them and the fan 7 gradually increasing. That is, several air outlets 52 are arranged sequentially along the length of the inner wall of the upper half of the cabinet 1, resulting in unequal distances between each air outlet 52 and the fan 7. The cross-sectional area of ​​the air inlet of the air supply channel to which the air outlet 52 closest to the fan 7 belongs is smaller than that of the air outlet 52 furthest from the fan 7. The cross-sectional area of ​​the air inlet of the air supply duct is larger the further away from the air outlet 52 of the fan 7. This ensures that the fan 7 delivers different amounts of cold air to different air supply ducts, and that the air supply ducts that are further away from the air outlet 52 of the fan 7 receive more air. In other words, the air supply ducts that are close to the air outlet 52 of the fan 7 receive less air than the air supply ducts that are far away from the air outlet 52 of the fan 7. This ensures that the final air velocity of the cold air flowing out of the air outlets 52 of different air supply ducts is the same, ensuring that the air volume at each position in the cabinet 1 is uniform and ensuring the cooling effect.

[0035] Combination Figures 5-7 In this technical solution, the air supply channel 5 has several air supply ducts inside. To distinguish these air supply ducts, they are named air supply duct one 53 and air supply duct two 54. The several air supply ducts include: air supply duct one 53, which has an air inlet one 531 and at least one air outlet 52, and the air inlet one 531 is connected to the fan 7; and air supply duct two 54, which has an air inlet two 541 and at least one air outlet 52, and the air inlet two 541 is connected to the fan 7; the front ends of air inlet one 531 and air inlet two 541 converge and are connected to the same exhaust port 73 of the fan 7. In practice, the air supply ducts may also include air supply duct three, air supply duct four, air supply duct five and more air supply ducts. The air supply channel 5 is divided into several air supply ducts by setting several diverter plates 55 inside the air supply channel 5.

[0036] Among them, the cross-sectional area of ​​air inlet 1 531 (i.e., the opening size of air inlet 1 531) is smaller than the cross-sectional area of ​​air inlet 2 541 (i.e., the opening size of air inlet 2 541). The air outlets 52 of air duct 1 53 and air outlets 52 of air duct 2 54 are arranged sequentially on the same inner wall of the long side of cabinet 1. The distance between the air outlet 52 of air duct 1 53 and the fan 7 is smaller than the distance between the air outlet 52 of air duct 2 54 and the fan 7, so that the air volume entering air duct 1 53 is less than the air volume entering air duct 2 54. The air outlet 52 of air duct 2 54 is farther away from the fan 7 than the air outlet 52 of air duct 1 53. Therefore, more air volume is needed to ensure that the wind speed of the cold air blown out from the air outlet 52 of air duct 2 54 reaches the set value, so as to ensure that the wind speeds of the air outlets 52 of air duct 1 53 and air outlets 52 of air duct 2 54 are the same.

[0037] like Figure 7 A diverter plate 55 is installed inside the air supply duct 5, which divides the air supply duct 5 into air duct one 53 and air duct two 54.

[0038] Combination Figure 6 and Figure 7 The front half of the second air duct 54 is provided with the second air inlet 541, and the rear half of the second air duct 54 is provided with several air outlets 52. The rear half of the second air duct 54 is provided with a guide plate 57. The guide plate 57 makes the cross-sectional area of ​​the rear half of the second air duct 54 smaller as it moves away from the fan 7. That is, in the direction away from the fan 7, the guide plate 57 makes the cross-sectional area of ​​the rear half of the second air duct 54 gradually decrease. Since the air outlets 52 of the second air duct 54 are further away from the fan 7, the wind force of the cold air blown is smaller. Therefore, it is necessary to reduce the cross-sectional area of ​​the second air duct 54 to ensure the wind speed of the air outlets 52 that are far away from the fan 7, so as to ensure that the wind speed of the cold air blown out by each air outlet 52 of the second air duct 54 is the same or reaches the set value, and ensures that the cold air blown out by each air outlet 52 is uniform and stable.

[0039] Combination Figure 6 and Figure 7 The guide plate 57 is bent towards the air outlet 52 near the air duct 2 54, so that the cross-sectional area of ​​the air duct 2 54 at different positions of the air outlet 52 can make the wind speed of the cold air blown out of the air outlet 52 at that position reach the set value, so that the cross-sectional area at different positions in the air duct 2 54 can make the wind speed at that position reach the set value.

[0040] Combination Figure 6 and Figure 8 The air outlet 52 of the air supply channel 5 is provided with several horizontal partitions 61 and / or vertical partitions 62, that is, each air outlet 52 is provided with several horizontal partitions 61 and / or several vertical partitions 62, so that each air outlet 52 forms a grid structure. The transverse partition 61 is inclined toward the cavity opening of the receiving cavity 11 so that the air outlet 52 of the air supply channel 5 blows out toward the cavity opening of the receiving cavity 11, thereby allowing the cold air blown out of the air outlet 52 to be blown into the guide groove 23 of the cover plate 21.

[0041] like Figure 8 A guide plate 63 is provided at the rear end of the transverse partition 61 located at the lower end of the air outlet 52 of the air supply channel 5 (the lower end of the air outlet 52 is the end away from the cavity opening of the receiving cavity 11). In this technical solution, a guide plate 63 is provided at the rear end of one or more transverse partitions 61 located at the lowest end of the air outlet 52 of the air supply channel 5. The guide plate 63 is inclined towards the cavity opening away from the receiving cavity 11, so that the cold air blown out of the air outlet 52 of the air supply channel 5 flows towards the bottom of the receiving cavity 11, thereby allowing a portion of the cold air blown out of the air outlet 52 to reach the lower half of the receiving cavity 11, ensuring that cold air can be blown to different positions in the receiving cavity 11.

[0042] The vertical partition 62 is inclined away from the fan 7, so that the cold air blown out of the air outlet 52 can flow towards the side of the cabinet 1 away from the fan 7, thus allowing the side of the cabinet 1 away from the fan 7 to also be exposed to air.

[0043] like Figure 8 An edge baffle 56 is provided at the upper edge of the air outlet 52. That is, an edge baffle 56 is provided at the edge of the air outlet 52 near the cavity opening of the receiving cavity 11. The edge baffle 56 is used to block water droplets, water mist or debris from entering the air outlet 52, and can also prevent water mist from frosting at the air outlet 52, ensuring the unobstructed flow of the air outlet 52, that is, ensuring the stable airflow from the air outlet 52.

[0044] Combination Figure 9 and Figure 10 The cover device 2 includes: a plurality of cover plates 21, which are rotatably mounted on the upper end of the cabinet 1 via hinges or hinge shafts, for sealing the receiving cavity 11; this technical solution provides two cover plates 21, but in practice more than two cover plates 21 can be provided. like Figure 2 At least one central beam 22 is provided in the cabinet 1. The central beam 22 is arranged along the length of the cabinet 1 at the opening of the receiving cavity 11. At least one cover plate 21 is provided on both sides of each central beam 22. In this technical solution, the cabinet 1 is provided with one central beam 22, and a cover plate 21 is provided on both sides of the central beam 22. The air outlets 52 of the air supply channel 5 are distributed on both sides of the central beam 22, that is, the air outlets 52 of the air duct 1 53 and the air outlets 52 of the air duct 2 54 are located on both sides of the central beam 22 and blow air into the space on both sides of the central beam 22. like Figure 10The cover plate 21 is provided with a guide channel 23, and the side wall of the guide channel 23 is provided with a guide arc surface 24. The guide arc surface 24 is used to guide the cold air from the air outlet 52 of the air supply channel 5 from one side of the opening of the guide channel 23 to the bottom of the guide channel 23 and blow it out from the other side of the opening of the guide channel 23, so that the other side of the cabinet 1 opposite to the side with the air outlet 52 can also be blown by cold air. Then the cold air flows along the side wall of the cabinet 1 to the bottom of the receiving cavity 11 and finally flows back into the cooling zone 41. The bottom of the flow channel 23 is provided with several flow guide protrusions 25, which are parallel to the central beam 22. The flow guide protrusions 25 are used to guide the flow of cold air in the flow channel 23.

[0045] The cabinet 1 is equipped with an inner liner 14, and the inner liner 14 is equipped with a receiving cavity 11. A partition plate 13 is provided in the receiving cavity 11. The partition plate 13 and the inner wall of the receiving cavity 11 form an installation cavity. The evaporator 42 of the refrigeration circulation device 4 is installed in the installation cavity, thereby forming a refrigeration zone 41 in the installation cavity. The fan 7 is connected to the installation cavity, that is, the fan 7 is connected to the refrigeration zone 41. A return port is opened on the partition plate 13, and the return port is connected to the refrigeration zone 41 of the installation cavity to form an air duct circulation.

[0046] Combination Figures 2-4 and Figure 11 The cabinet 1 is equipped with a quick-freezing zone 12, which is located above the refrigeration zone 41 of the refrigeration cycle device 4, that is, at the upper end of the partition plate 13. The fan 7 is located beside the quick-freezing zone 12. The fan 7 is equipped with several air outlets 71. The fan 7 blows air towards the quick-freezing zone 12 through the air outlets 71. The air outlets 71 are equipped with baffles 72, which are rotated by a motor. The rotation of the baffles 72 opens or closes the air outlets 71, and the rotation of the baffles 72 can adjust the size of the air outlets 71 to adjust the air volume, thereby adjusting the temperature of the quick-freezing zone 12.

[0047] The refrigeration cycle device 4 is existing technology, including a compressor, a condenser, and an evaporator 42. The compressor is installed inside the cabinet 1. The condenser is connected to the compressor, and the evaporator 42 is connected to the compressor. The evaporator 42 and the condenser are connected through a capillary tube. The evaporator 42 is located inside the inner liner 14. The condenser extends from the inner wall of the inner liner 14 and wraps around the outer wall of the lower half of the inner liner 14 to achieve refrigeration of the lower half of the receiving cavity 11.

[0048] The foregoing has shown and described the basic principles, main features, and advantages of this technical solution. Those skilled in the art should understand that this technical solution is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this technical solution. Various changes and modifications can be made to this technical solution without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed technical solution. The scope of protection of this technical solution is defined by the appended claims and their equivalents.

[0049] It should be noted that the structures, proportions, and sizes depicted in the accompanying drawings are solely for illustrative purposes and to aid those skilled in the art in understanding and reading the content disclosed herein. They are not intended to limit the implementation of this technical solution and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this technical solution, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms used in this specification, such as "upper," "lower," "left," "right," "middle," and "one," are merely for clarity and not intended to limit the scope of implementation of this technical solution. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the technical solution's implementation.

[0050] It should also be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0051] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

Claims

1. A freezer with air-cooling function, characterized in that, include: The cabinet (1) has an accommodating cavity (11) with its opening facing upwards. A cover device (2) is installed on the upper end of the cabinet (1) to seal the receiving cavity (11). Air-cooled device (3), which is installed inside the cabinet (1), is used to supply air to cool the upper part of the receiving cavity (11); A refrigeration circulation device (4) is installed inside the cabinet (1) to cool the lower half of the receiving cavity (11); The air-cooling device (3) includes: An air supply channel (5) is horizontally arranged on the inner wall of the upper half of the cabinet (1). The air outlet (52) of the air supply channel (5) is located on the inner wall of the long side of the cabinet (1), and the air outlet (52) of the air supply channel (5) is connected to the interior of the receiving cavity (11). A fan (7) is installed on the side wall of the cabinet (1) and the fan (7) is connected to the air supply channel (5) and the cooling zone (41) of the refrigeration cycle device (4) to deliver the cold air in the cooling zone (41) to the receiving cavity (11) through the air supply channel (5).

2. A freezer with air-cooling function according to claim 1, characterized in that: The air supply channel (5) has several air supply channels, each of which has an air inlet and an air outlet (52). Several air outlets (52) are arranged sequentially on the inner wall of the upper half of the cabinet (1) and the distance between them and the fan (7) gradually increases. The cross-sectional area of ​​the air inlet of the air supply channel to which the air outlet (52) near the fan (7) belongs is smaller than the cross-sectional area of ​​the air inlet of the air supply channel to which the air outlet (52) far away from the fan (7) belongs.

3. A freezer with air-cooling function according to claim 2, characterized in that: Several of the aforementioned air supply ducts include at least: Air duct 1 (53) has an air inlet 1 (531) and at least one of the said air outlets (52), the air inlet 1 (531) being connected to the fan (7); Air duct two (54) has an air inlet two (541) and at least one of the said air outlets (52), the air inlet two (541) being connected to the fan (7); Among them, the cross-sectional area of ​​the first air inlet (531) is smaller than that of the second air inlet (541). The air outlets (52) of the first air duct (53) and the air outlets (52) of the second air duct (54) are arranged sequentially on the same inner wall of the long side of the cabinet (1). The distance between the air outlet (52) of the first air duct (53) and the fan (7) is smaller than the distance between the air outlet (52) of the second air duct (54) and the fan (7).

4. A freezer with air-cooling function according to claim 3, characterized in that: The air outlet (52) is provided in the rear half of the second air duct (54), and a guide plate (57) is provided in the rear half of the second air duct (54). The guide plate (57) makes the cross-sectional area of ​​the rear half of the second air duct (54) smaller as it gets further away from the fan (7).

5. A freezer with air-cooling function according to claim 4, characterized in that: The guide plate (57) is bent toward the air outlet (52) near the second air duct (54).

6. A freezer with air-cooling function according to any one of claims 1-5, characterized in that: The air outlet (52) of the air supply channel (5) is provided with a number of horizontal partitions (61) and / or vertical partitions (62). The transverse partition (61) is inclined toward the opening of the receiving cavity (11) so that the air outlet (52) of the air supply channel (5) blows out toward the opening of the receiving cavity (11).

7. A freezer with air-cooling function according to claim 6, characterized in that: A guide plate (63) is provided at the rear end of the transverse partition (61) located at the lower end of the air outlet (52) of the air supply channel (5). The guide plate (63) is inclined in the direction away from the cavity opening of the receiving cavity (11) so that the cold air blown out of the air outlet (52) of the air supply channel (5) flows toward the bottom of the receiving cavity (11).

8. A freezer with air-cooling function according to claim 6, characterized in that: The vertical partition (62) is inclined away from the fan (7).

9. A freezer with air-cooling function according to claim 1, 2, 3, 4, 5, 7, or 8, characterized in that: The cover device (2) includes: Several cover plates (21) are rotatably disposed at the upper end of the cabinet (1) to seal the receiving cavity (11). The cabinet (1) is provided with at least one central beam (22), and cover plates (21) are provided on both sides of the central beam (22). The air outlets (52) of the air supply channel (5) are distributed on both sides of the central beam (22). The cover plate (21) is provided with a guide groove (23), and the side wall of the guide groove (23) is provided with a guide arc surface (24). The guide arc surface (24) is used to guide the cold air from the air outlet (52) of the air supply channel (5) from the opening of the guide groove (23) to the bottom of the guide groove (23). The bottom of the guide channel (23) is provided with several guide protrusions (25), which are parallel to the middle beam (22).

10. A freezer with air-cooling function according to any one of claims 1, 2, 3, 4, 5, 7, or 8, characterized in that: The cabinet (1) is provided with a quick-freezing zone (12), which is located above the refrigeration zone (41) of the refrigeration cycle device (4). The fan (7) is located on the side of the quick-freezing zone (12). The fan (7) is provided with several air outlets (71). The fan (7) blows air toward the quick-freezing zone (12) through the air outlets (71). The air outlets (71) are provided with baffles (72), which are used to open or close the air outlets (71).

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