Air-cooled refrigerator with refrigeration three-dimensional air return duct

Abstract

The invention provides an air-cooled refrigerator with a refrigeration three-dimensional return air duct, which comprises a freezing air duct assembly, a refrigeration air duct assembly and a connecting air duct structure, and realizes cold transfer and air circulation between the freezing air duct assembly and the refrigeration air duct assembly. And a freezing fan in the freezing air duct assembly operates, and cold energy generated by the evaporator is conveyed to an air supply channel of the connecting air duct through a freezing air duct air path. The air supply channel transmits the cooling capacity to the air supply path of the refrigeration air channel assembly, and the air supply path evenly blows the cooling capacity into the refrigeration chamber. The temperature of air in the refrigerating chamber is reduced under the action of cooling capacity, and cold air naturally sinks and is conveyed back to an evaporator chamber of the freezing chamber through an air return path of the refrigerating air duct assembly and an air return channel of the connecting air duct. According to the air-cooled refrigerator with the refrigeration three-dimensional air return duct, complete air circulation from top to bottom in the refrigeration chamber is achieved, the temperature uniformity in the refrigeration chamber is improved, the refrigeration efficiency of the air-cooled refrigerator is improved, and energy consumption is reduced.

Description

Technical Field

[0001] This application relates to the technical field of household appliances, and more particularly to a frost-free refrigerator with a refrigerating three-dimensional return air duct. Background Art

[0002] The design of a frost-free refrigerator with a refrigerating three-dimensional return air duct in the single-system of the type with freezing at the top and refrigerating at the bottom is unique. The refrigerating chamber is located at the lower part of the refrigerator, while the freezing chamber is arranged at the upper part. This design aims to optimize the storage space and meet the fresh-keeping requirements of different food materials.

[0003] In the current traditional design, the return air outlet of the refrigerating chamber is usually located at the top of the compartment. The cold air is transported from the evaporator in the upper freezing chamber to the refrigerating chamber through a blower. However, there is an obvious problem with this design: the cold air is likely to directly flow back to the evaporator from the top, forming what is called a "short circuit of the air path".

[0004] The "short circuit of the air path" phenomenon causes the bottom area of the refrigerating chamber to be unable to effectively participate in the cold air circulation, making it difficult to take away the heat in this area. In addition, due to the relatively large density of cold air, its natural downward trend conflicts with the top return air design. If the blowing force of the blower is insufficient or the air outlet design is unreasonable, it will be difficult for the cold air to evenly cover the entire refrigerating chamber, and the bottom area may have a relatively high temperature. The fruit and vegetable box at the bottom usually has a relatively strong sealing performance and is close to the bottom of the refrigerating chamber. Therefore, if the heat generated by its own water vapor evaporation and respiration cannot be discharged in time through the cold air circulation, it will further exacerbate the local temperature rise and affect the fresh-keeping effect of the food materials. Summary of the Invention

[0005] To solve the above problem that in the existing refrigerating chamber, the return air outlet is usually located at the top of the compartment, and the cold air is likely to directly flow back to the evaporator from the top, forming a "short circuit of the air path".

[0006] This application provides a frost-free refrigerator with a refrigerating three-dimensional return air duct, including: a box body, a freezing chamber, a refrigerating chamber, a freezing air duct assembly, a refrigerating air duct assembly, and a connecting air duct;

[0007] The freezing chamber is located at the upper part of the box body, the refrigerating chamber is located at the lower part of the box body, and the freezing air duct assembly and the refrigerating air duct assembly are communicated through the connecting air duct;

[0008] The refrigerating air duct assembly includes a blowing air path and an independently arranged return air path;

[0009] The air outlet of the blowing air path is communicated with the refrigerating chamber for blowing air into the refrigerating chamber, and the inlet of the return air path is located at the bottom of the refrigerating air duct assembly;

[0010] The connecting air duct includes a blowing channel and a return air channel;

[0011] The air supply channel connects the refrigeration air duct assembly and the air supply air path, and the return air channel connects the return air path and the evaporator compartment in the freezer compartment.

[0012] In a feasible implementation manner, the refrigerated air duct assembly further includes: a detachable lower return air path;

[0013] The lower return air path is connected to the return air path, and a return air inlet is arranged along the height direction of the refrigerator compartment in the lower return air path.

[0014] In a feasible implementation manner, the return air inlet includes: a first return air inlet, a second return air inlet, and a third return air inlet;

[0015] The first return air inlet, the second return air inlet, and the third return air inlet are arranged in sequence from high to low on the back of the refrigerator compartment, and form a three-dimensional return air structure with a vertical distribution with the lower return air path.

[0016] In a feasible implementation manner, the lower return air path is vertically arranged along the back of the refrigerator compartment and is located at the lower part of the refrigerated air duct assembly;

[0017] The lower return air path is connected to the return air path through a duct in the vertical direction, and the lower return air path is connected to the bottom of the evaporator compartment through the return air path.

[0018] In a feasible implementation manner, the refrigerated air duct assembly includes: a refrigerated face mask, a first refrigerated air duct, and a second refrigerated air duct;

[0019] The first refrigerated air duct and the second refrigerated air duct are spliced to form the air supply air path, and the return air path is formed by attaching auxiliary material adhesive sponge to the rear parts of the first refrigerated air duct and the second refrigerated air duct.

[0020] In a feasible implementation manner, the refrigeration air duct assembly includes a refrigeration air duct air path;

[0021] One end of the refrigeration air duct air path is connected to the evaporator and the refrigeration fan in the freezer compartment, and the other end is connected to the connecting duct, and conveys cold air to the refrigerated air duct assembly through the air supply channel.

[0022] In a feasible implementation manner, the connecting duct is of a split structure, the air supply channel and the return air channel are separated by a partition board, and the outlet of the return air channel extends to the bottom of the evaporator compartment.

[0023] In a feasible implementation manner, the air supply air path and the return air path of the refrigerated air duct assembly are vertically distributed along the rear wall of the refrigerator compartment;

[0024] The air outlet of the air supply air duct is located at the top of the refrigerating compartment, and the inlet of the return air duct is located at the bottom of the refrigerating compartment, forming a circulating path from top to bottom.

[0025] In a feasible implementation manner, a sealed connection is formed between the inlet of the return air duct and the evaporator compartment through the return air channel, and the cross-sectional area of the return air channel is larger than that of the air supply channel.

[0026] In a feasible implementation manner, the materials of the freezing air duct assembly and the refrigerating air duct assembly are both ABS engineering plastics, and the inner wall of the return air duct is provided with flow guiding ribs.

[0027] As can be seen from the above, according to the above embodiments, the air-cooled refrigerator with a refrigerating three-dimensional return air duct of the present application realizes the cold quantity transfer and air circulation between the freezing air duct assembly and the refrigerating air duct assembly through the structures of the freezing air duct assembly, the refrigerating air duct assembly and the connecting air duct. The refrigerating air duct assembly distributes the air supply air duct and the return air duct reasonably to make it meet the complete air circulation air duct from top to bottom in the refrigerating compartment and avoid short circuit on the wall surface; by connecting a return air duct at the lower part of the refrigerating three-dimensional air duct, the generalization of products with different heights on the same platform is realized, and the complete air circulation is ensured. The inlet of the return air duct is arranged at the bottom of the refrigerating compartment, which is beneficial to the recovery of cold air. The connecting air duct is of a split structure, and the air supply channel and the return air channel are separated by a partition plate to avoid cold quantity mixing. The cross-sectional area of the return air channel is larger than that of the air supply channel, which is beneficial to the recovery of cold air. The air-cooled refrigerator with a refrigerating three-dimensional return air duct of the present application realizes the complete air circulation from top to bottom in the refrigerating compartment, improves the temperature uniformity in the refrigerating compartment, improves the refrigeration efficiency of the air-cooled refrigerator and reduces the energy consumption. Description of the Drawings

[0028] The drawings here are incorporated into the specification and form a part of this specification, showing the embodiments that conform to the implementation of the present invention, and are used together with the specification to explain the principles of the embodiments of the present invention. Obviously, the drawings in the following description are only some embodiments of the implementation of the present invention, and those of ordinary skill in the art can obtain other drawings according to these drawings without creative efforts.

[0029] Figure 1 is a schematic diagram of the box structure of the air-cooled refrigerator with a refrigerating three-dimensional return air duct shown in the embodiment of the present application;

[0030] Figure 2 is a schematic cross-sectional structure diagram of the box of the air-cooled refrigerator with a refrigerating three-dimensional return air duct shown in the embodiment of the present application;

[0031] Figure 3 is Figure 2 a partial enlarged view of;

[0032] Figure 4 It is a schematic structural diagram of the refrigerated air duct assembly shown in the embodiments of the present application;

[0033] Figure 5 It is an exploded schematic diagram of the refrigerated air duct assembly shown in the embodiments of the present application.

[0034] Description of the reference numerals in the drawings:

[0035] 100 - box body; 1 - freezer compartment; 2 - refrigerating compartment; 3 - freezer air duct assembly; 4 - refrigerated air duct assembly; 5 - evaporator compartment; 6 - connecting air duct; 7 - lower return air path; 11 - evaporator; 12 - freezer fan; 31 - freezer air duct air path; 41 - supply air path; 42 - return air path; 61 - supply air channel; 62 - return air channel; 71 - first return air inlet; 72 - second return air inlet; 73 - third return air inlet; 401 - refrigerated face mask; 402 - first refrigerated air duct; 403 - second refrigerated air duct; 404 - adhesive sponge; 405 - inlet; 406 - air outlet. Detailed implementation manners

[0036] Now, the exemplary embodiments will be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be implemented in various forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The features, structures, or characteristics described may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of the embodiments of the present invention.

[0037] In the current design, the return air outlet of the refrigerating compartment is usually located at the top of the compartment. The cold air is transported from the evaporator in the upper freezer compartment to the refrigerating compartment through the fan. The cold air is prone to directly flow back to the evaporator from the top, forming a "short - circuit of the air path". The "short - circuit of the air path" phenomenon causes the bottom area of the refrigerating compartment to be unable to effectively participate in the cold air circulation, making it difficult to take away the heat in this area. In addition, due to the relatively large density of cold air, its natural tendency to sink conflicts with the design of top - return air. If the wind force of the fan is insufficient or the air outlet design is unreasonable, the cold air will be difficult to evenly cover the entire refrigerating compartment, especially the bottom area may have a relatively high temperature. The vegetable and fruit box at the bottom usually has a strong sealing property and is close to the bottom of the refrigerating compartment. Therefore, if the heat generated by its own water vapor evaporation and respiration cannot be discharged in time through the cold air circulation, it will further exacerbate the local temperature rise and affect the fresh - keeping effect of the food materials.

[0038] To solve the above problems, the present application proposes an air - cooled refrigerator with a three - dimensional return air duct for the refrigerating compartment. Refer to Figures 1-5As shown in the figure, its structure includes a box body 100, a freezer compartment 1, a refrigerating compartment 2, a freezer air duct assembly 3, a refrigerating air duct assembly 4 and a connecting air duct 6.

[0039] The freezer compartment 1 is located in the upper part of the box body 100, and the refrigerating compartment 2 is located in the lower part of the box body 100. The freezer air duct assembly 3 and the refrigerating air duct assembly 4 are connected through the connecting air duct 6. The refrigerating air duct assembly 4 includes a supply air passage 41 and an independently arranged return air passage 42. The air outlet of the supply air passage 41 communicates with the refrigerating compartment 2 for supplying air into the refrigerating compartment 2. The inlet 405 of the return air passage 42 is located at the bottom of the refrigerating air duct assembly 4. The supply air passage 41 transports the cold generated by the freezer air duct assembly 3 to the refrigerating compartment 2 to ensure uniform temperature in the refrigerating compartment 2. The return air passage 42 sucks the air in the refrigerating compartment 2 back to the evaporator compartment 5 to form a complete air circulation.

[0040] The connecting air duct 6 includes a supply air passage 61 and a return air passage 62. The supply air passage 61 communicates the freezer air duct assembly 3 with the supply air passage 41, and the return air passage 62 communicates the return air passage 42 with the evaporator compartment 5 in the freezer compartment 1. The connecting air duct 6 serves as a bridge to realize the cold transfer and air circulation between the freezer air duct assembly 3 and the refrigerating air duct assembly 4.

[0041] During the operation of the refrigerator, the freezer fan 12 in the freezer air duct assembly 3 operates to transport the cold generated by the evaporator 11 to the supply air passage 61 of the connecting air duct 6 through the freezer air duct passage 31. The supply air passage 61 transfers the cold to the supply air passage 41 of the refrigerating air duct assembly 4, and the air outlet of the supply air passage 41 evenly blows the cold into the refrigerating compartment 2. The air in the refrigerating compartment 2 decreases in temperature under the action of the cold, and the cold air naturally sinks and enters the return air passage 42 through the inlet 405 at the bottom of the refrigerating air duct assembly 4. The return air passage 42 transports the cold air back to the evaporator compartment 5 in the freezer compartment 1 through the return air passage 62 of the connecting air duct 6 to complete the air circulation.

[0042] In this embodiment, by arranging the inlet 405 of the return air passage 42 at the bottom of the refrigerating air duct assembly 4, the phenomenon of air duct short - circuit is effectively avoided, enabling the air in the refrigerating compartment 2 to form a complete circulation path. Since the cold air has a large density and the characteristic of natural sinking. Arranging the inlet 405 of the return air passage 42 at the bottom of the refrigerating air duct assembly 4 is consistent with the sinking trend of the cold air, which is beneficial to the recovery and circulation of the cold air.

[0043] Furthermore, the bottom - return design of the refrigerating air duct assembly 4 ensures that the air in the bottom area of the refrigerating compartment 2 can also effectively participate in the cold air circulation. In this way, the heat in the bottom area can be taken away in time, avoiding the problem of poor fresh - keeping effect of food materials caused by local over - high temperature. At the same time, the bottom - return design also helps to reduce the temperature fluctuation in the refrigerating compartment 2, improve the overall temperature uniformity, and further enhance the fresh - keeping effect of food materials.

[0044] In addition, the air-cooled refrigerator with a refrigerated three-dimensional return air duct in this embodiment realizes the cold quantity transfer and air circulation between the freezing duct assembly 3 and the refrigerating duct assembly 4 through the connecting duct 6. This design not only simplifies the internal structure of the refrigerator, but also improves the efficiency and stability of cold quantity transfer. During the operation of the refrigerator, the noise generated by the operation of the freezing fan 12 is also effectively controlled, providing a quieter use environment for users.

[0045] In summary, the air-cooled refrigerator with a refrigerated three-dimensional return air duct proposed in this embodiment effectively solves the problem of high temperature in the bottom area of the refrigerating chamber by optimizing the design of the return air path, improving the overall temperature uniformity and the fresh-keeping effect of food materials. At the same time, this refrigerator also has the advantages of simple structure, high cold quantity transfer efficiency, low noise, etc., and has high practical value and market promotion prospects.

[0046] In some embodiments of the present application, the refrigerating duct assembly 4 further includes a detachable lower return air path 7. The lower return air path 7 is communicated with the return air path 42, and a return air inlet is arranged along the height direction of the lower return air path 7 in the refrigerating chamber 2.

[0047] Among them, the setting of the lower return air path 7 extends the inlet of the return air path, enabling the air in the refrigerating chamber 2 to be more fully sucked back into the evaporator compartment 5. The setting of multiple return air inlets increases the return air area and improves the return air efficiency.

[0048] In this embodiment, the air in the refrigerating chamber 2 not only enters the return air path 42 through the inlet 405 of the return air path 42 at the bottom of the refrigerating duct assembly 4, but also can enter the return air path 42 through multiple return air inlets on the lower return air path 7. The multiple return air inlets on the lower return air path 7 are distributed along the height direction of the refrigerating chamber 2, and can recover the air at different heights in the refrigerating chamber 2 more comprehensively. By increasing the number and distribution range of the return air inlets, the return air efficiency is improved, ensuring that the air in each area of the refrigerating chamber 2 can be fully recovered.

[0049] In some embodiments of the present application, the return air inlets include a first return air inlet 71, a second return air inlet 72, and a third return air inlet 73. The first return air inlet 71, the second return air inlet 72, and the third return air inlet 73 are arranged in sequence from high to low on the back of the refrigerating chamber 2, and form a three-dimensional return air structure with a vertical distribution with the lower return air path 7.

[0050] It can be understood that the setting of the three return air inlets at different height positions on the back of the refrigerating chamber 2 can recover the air on each layer in the refrigerating chamber 2 more comprehensively. The three-dimensional return air structure with a vertical distribution makes the return air path more reasonable and improves the return air efficiency.

[0051] In this embodiment, the air in the refrigerating chamber 2 not only enters the return air duct 42 through the return air duct inlet 405 at the bottom of the refrigerating air duct assembly 4, but also can enter the return air duct 42 through the first return air inlet 71, the second return air inlet 72, and the third return air inlet 73 on the lower return air duct 7. The three return air inlets respectively recover the air at different heights in the refrigerating chamber 2, forming a three-dimensional return air effect. For refrigerating chambers 2 with different heights, the traditional single return air inlet may not be able to fully recover the air in all areas of the refrigerating chamber 2, resulting in uneven temperature in some areas.

[0052] In this embodiment, by setting multiple return air inlets and forming a three-dimensional return air structure, the problem of insufficient recovery of the air on each layer in the refrigerating chamber 2 is solved. It realizes more comprehensive air recovery in the refrigerating chamber 2, improves the temperature uniformity in the refrigerating chamber 2. The three-dimensional return air structure makes the return air path more reasonable and improves the return air efficiency.

[0053] In some specific embodiments of the present application, the lower return air duct 7 is designed to be vertically arranged along the back of the refrigerating chamber 2, and such a layout is located below the refrigerating air duct assembly 4. This design not only helps to save space, but also can effectively utilize the vertical space, making the entire refrigeration system more compact. The lower return air duct 7 and the return air duct 42 are connected through a duct in the vertical direction to ensure smooth air circulation. It improves the air circulation efficiency and helps to reduce energy consumption.

[0054] At the same time, the lower return air duct 7 is further connected to the bottom of the evaporator compartment 5 through the return air duct 42 to form a return air channel from bottom to top. In this way, the temperature in the refrigerating chamber can be more evenly distributed, thereby providing a more stable storage environment for the food stored therein.

[0055] In some embodiments of the present application, the refrigerating air duct assembly 4 includes a refrigerating mask 401, a first refrigerating air duct 402, and a second refrigerating air duct 403. The first refrigerating air duct 402 and the second refrigerating air duct 403 are spliced to form a supply air duct 41, and the return air duct 42 is formed by the auxiliary material adhesive sponge 404 being pasted on the rear parts of the first refrigerating air duct 402 and the second refrigerating air duct 403.

[0056] Among them, the refrigerating mask 401 plays a role in fixing and decorating. The supply air duct 41 formed by splicing the first refrigerating air duct 402 and the second refrigerating air duct 403 is used to convey cold air to the refrigerating chamber 2. The return air duct 42 formed by pasting the auxiliary material adhesive sponge 404 is used to suck the air in the refrigerating chamber 2 back to the evaporator compartment 5.

[0057] When the refrigeration fan 12 in the refrigeration air duct assembly 3 operates, the cold generated by the evaporator 11 is conveyed through the refrigeration air duct path 31 to the air supply channel 61 of the connecting air duct 6. The air supply channel 61 transfers the cold to the air supply air path 41 of the refrigerated air duct assembly 4. The air supply air path 41 is formed by splicing the first refrigerated air duct 402 and the second refrigerated air duct 403, and blows the cold evenly into the refrigerating chamber 2.

[0058] The air in the refrigerating chamber 2 is cooled under the action of the cold, and the cold air naturally sinks and enters the evaporator compartment 5 through the air return path 42 at the rear of the refrigerated air duct assembly 4. The air return path 42 is formed by pasting auxiliary material adhesive sponge 404 on the rear parts of the first refrigerated air duct 402 and the second refrigerated air duct 403, and can effectively suck the cold air back to the evaporator compartment 5.

[0059] In this embodiment, by splicing the first refrigerated air duct 402 and the second refrigerated air duct 403 to form the air supply air path 41, and using the auxiliary material adhesive sponge 404 to paste to form the air return path 42, the structure of the refrigerated air duct assembly 4 is simplified, which is convenient for processing and installation. Moreover, the air supply air path 41 and the air return air path 42 are respectively composed of different components, which is convenient for maintenance and replacement. The auxiliary material adhesive sponge 404 also has good sealing and heat preservation properties, and can improve the efficiency of the air return path 42.

[0060] In some embodiments of the present application, the refrigeration air duct assembly 3 includes a refrigeration air duct path 31. One end of the refrigeration air duct path 31 is connected to the evaporator 11 and the refrigeration fan 12 in the freezer 1, and the other end is connected to the connecting air duct 6, and conveys the cold to the refrigerated air duct assembly 4 through the air supply channel 61.

[0061] The refrigeration air duct path 31 is used to convey the cold generated by the evaporator 11 to the air supply channel 61 of the connecting air duct 6 under the action of the refrigeration fan 12. The air supply channel 61 conveys the cold to the refrigerated air duct assembly 4, realizing the cold transfer between the refrigeration air duct assembly 3 and the refrigerated air duct assembly 4.

[0062] When the refrigeration fan 12 operates, the cold generated by the evaporator 11 is conveyed through the refrigeration air duct path 31 to the air supply channel 61 of the connecting air duct 6. The air supply channel 61 transfers the cold to the air supply air path 41 of the refrigerated air duct assembly 4, and the air supply air path 41 blows the cold evenly into the refrigerating chamber 2. The air in the refrigerating chamber 2 is cooled under the action of the cold, and the cold air naturally sinks and is conveyed back to the evaporator compartment 5 of the freezer 1 through the air return path 42 of the refrigerated air duct assembly 4 and the air return channel 62 of the connecting air duct 6.

[0063] This embodiment utilizes the power generated by the refrigeration fan 12, and directly connects the evaporator 11, the refrigeration fan 12 and the air supply channel 61 of the connecting air duct 6 by using the refrigeration air duct path 31, which simplifies the structure of the refrigeration air duct assembly 3 and is convenient for realizing cold transfer.

[0064] In some embodiments of the present application, the connecting air duct 6 is a split structure. The air supply channel 61 and the air return channel 62 are separated by a partition, and the outlet of the air return channel 62 extends to the bottom of the evaporator compartment 5.

[0065] The split structure enables the air supply channel 61 and the air return channel 62 of the connecting air duct 6 to be independent of each other, avoiding the mixing of cold air during the transfer process. The partition separates the air supply channel 61 and the air return channel 62, improving the sealing and heat preservation of the connecting air duct 6. The outlet of the air return channel 62 extends to the bottom of the evaporator compartment 5, which is beneficial to the recovery and circulation of cold air.

[0066] In the traditional connecting air duct structure, there is a situation where cold air is mixed during the transfer process, resulting in a reduction in refrigeration efficiency. In this embodiment, by adopting a split structure and using a partition to separate the air supply channel 61 and the air return channel 62, the mixing of air in the air supply channel 61 and the air return channel 62 is avoided, solving the problem of cold air mixing and improving the refrigeration efficiency.

[0067] In some embodiments of the present application, the air supply air path 41 and the air return air path 42 of the refrigerated air duct assembly 4 are vertically distributed along the rear wall of the refrigerating chamber 2. The air outlet of the air supply air path 41 is located at the top of the refrigerating chamber 2, and the inlet 405 of the air return air path 42 is located at the bottom of the refrigerating chamber 2 and is communicated with the air outlet 406, forming a bottom-up circulation path.

[0068] This vertically distributed design optimizes the cold air distribution in the refrigerating chamber 2, ensuring that the temperatures in all regions of the refrigerating chamber 2 are more uniform. The selection of the air outlet position of the air supply air path 41 enables the cold air to quickly cover the upper area of the refrigerating chamber 2. At the same time, the cold air naturally sinks under the action of gravity, further promoting the temperature balance in the refrigerating chamber 2. The inlet 405 of the air return air path 42 is located at the bottom, effectively collecting the sinking cold air and returning it to the refrigeration system through the air return channel for re-cooling, thereby realizing efficient energy recycling.

[0069] In some embodiments of the present application, a sealed connection is formed between the inlet 405 of the air return air path 42 and the evaporator compartment 5 through the air return channel 62. The sealed connection ensures the smoothness of the air flow between the inlet 405 of the air return air path 42 and the evaporator compartment 5. Moreover, the cross-sectional area of the air return channel 62 is larger than that of the air supply channel 61, which is beneficial to the recovery of cold air because a larger cross-sectional area can reduce the resistance during air flow, thereby improving the cold air recovery efficiency.

[0070] In some embodiments of the present application, the materials of both the freezing air duct assembly 3 and the refrigerated air duct assembly 4 are ABS engineering plastics, and the inner wall of the air return air path 42 is provided with flow guiding ribs.

[0071] ABS engineering plastics are very suitable for manufacturing air duct components of various shapes due to their good processing performance and corrosion resistance. In addition, flow guiding ribs are specially designed on the inner wall of the return air duct 42. The function of these flow guiding ribs is to guide the flow direction of cold air in the return air duct 42, ensure that the cold air can flow more orderly, thereby improving the return air efficiency and ensuring the optimization of the performance of the refrigeration system.

[0072] According to the content of the above embodiments, the air-cooled refrigerator with a refrigerated three-dimensional return air duct of the present application realizes the cold quantity transfer and air circulation between the freezing air duct assembly and the refrigerating air duct assembly through the structure of the freezing air duct assembly, the refrigerating air duct assembly and the connecting air duct. The freezing fan in the freezing air duct assembly operates, and the cold quantity generated by the evaporator is transported to the air supply channel of the connecting air duct through the air duct air path of the freezing air duct. The air supply channel transfers the cold quantity to the air supply air path of the refrigerating air duct assembly, and the air supply air path evenly blows the cold quantity into the refrigerating chamber. The air in the refrigerating chamber decreases in temperature under the action of the cold quantity, and the cold air naturally sinks and is transported back to the evaporator compartment of the freezing chamber through the return air duct of the refrigerating air duct assembly and the return air channel of the connecting air duct. The inlet of the return air duct is arranged at the bottom of the refrigerating chamber, which is beneficial to the recovery of cold air. The connecting air duct is of a split structure, and the air supply channel and the return air channel are separated by a partition to avoid cold quantity mixing. The cross-sectional area of the return air channel is larger than that of the air supply channel, which is beneficial to the recovery of cold air. The air-cooled refrigerator with a refrigerated three-dimensional return air duct of the present application realizes the complete air circulation from top to bottom in the refrigerating chamber, improves the temperature uniformity in the refrigerating chamber, improves the refrigeration efficiency of the air-cooled refrigerator, and reduces energy consumption.

[0073] After considering the specification and practicing the disclosure herein, those skilled in the art will readily conceive of other embodiments of the present disclosure. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include known common knowledge or conventional technical means in the technical field not disclosed in the present disclosure. The specification and embodiments are only to be considered as exemplary, and the true scope and spirit of the present disclosure are pointed out by the following claims.

Claims

1. An air-cooled refrigerator with a three-dimensional return air duct for refrigeration, characterized in that: include: A box body (100), a freezing chamber (1), a refrigerating chamber (2), a freezing air duct assembly (3), a refrigerating air duct assembly (4), and a connecting air duct (6); The freezing chamber (1) is located at the upper part of the box body (100), the refrigerating chamber (2) is located at the lower part of the box body (100), and the freezing air duct assembly (3) and the refrigerating air duct assembly (4) are connected via the connecting air duct (6); The refrigeration air duct assembly (4) comprises an air supply air duct (41) and an independently arranged return air duct (42); The air outlet of the air supply passage (41) is connected to the refrigerating chamber (2) and is used to supply air into the refrigerating chamber (2); the inlet (405) of the return air passage (42) is located at the bottom of the refrigerating air duct assembly (4); The connecting air duct (6) comprises an air supply channel (61) and an air return channel (62); The air supply channel (61) connects the freezing air duct assembly (3) with the air supply air path (41), and the return air channel (62) connects the return air path (42) with the evaporator compartment (5) in the freezing chamber (1).

2. The air-cooled refrigerator with a refrigerated three-dimensional return air duct according to claim 1, characterized in that: The refrigeration air duct assembly (4) further comprises: a detachable lower return air duct (7); The lower return air passage (7) is in communication with the return air passage (42), and a return air inlet is provided along the lower return air passage (7) in the height direction of the refrigerating chamber (2).

3. The air-cooled refrigerator with a refrigerated three-dimensional return air duct according to claim 2, characterized in that: The return air inlet comprises: a first return air inlet (71), a second return air inlet (72) and a third return air inlet (73); The first return air inlet (71), the second return air inlet (72) and the third return air inlet (73) are arranged in sequence from high to low at the back of the refrigerating chamber (2), and form a vertically distributed three-dimensional return air structure with the lower return air duct (7).

4. The air-cooled refrigerator with a refrigerated three-dimensional return air duct according to claim 2, characterized in that: The lower return air duct (7) is vertically arranged along the back of the refrigerating chamber (2) and is located at the lower part of the refrigerating air duct assembly (4); The lower return air passage (7) is connected to the return air passage (42) via an air duct in a vertical direction, and the lower return air passage (7) is connected to the bottom of the evaporator compartment (5) via the return air passage (42).

5. The air-cooled refrigerator with a refrigerated three-dimensional return air duct according to claim 1, characterized in that: The refrigeration air duct assembly (4) comprises: a refrigeration mask (401), a first refrigeration air duct (402) and a second refrigeration air duct (403); The first refrigeration air duct (402) and the second refrigeration air duct (403) are spliced ​​to form the air supply air duct (41), and the return air duct (42) is formed by an auxiliary material viscose sponge (404) applied to the rear of the first refrigeration air duct (402) and the second refrigeration air duct (403).

6. The air-cooled refrigerator with a refrigerated three-dimensional return air duct according to claim 1, characterized in that: The freezing air duct assembly (3) comprises a freezing air duct air path (31); One end of the freezing air duct air path (31) is connected to the evaporator (11) and the freezing fan (12) of the freezing chamber (1), and the other end is connected to the connecting air duct (6), and transmits cold air to the refrigeration air duct assembly (4) through the air supply channel (61).

7. The air-cooled refrigerator with a refrigerated three-dimensional return air duct according to claim 1, characterized in that: The connecting air duct (6) is a split structure, the air supply channel (61) and the return air channel (62) are separated by a partition, and the outlet of the return air channel (62) extends to the bottom of the evaporator compartment (5).

8. The air-cooled refrigerator with a refrigerated three-dimensional return air duct according to claim 1, characterized in that: The air supply path (41) and the air return path (42) of the refrigeration air duct assembly (4) are vertically distributed along the rear wall of the refrigeration chamber (2); The air outlet of the air supply passage (41) is located at the top of the refrigerating chamber (2), and the inlet (405) of the air return passage (42) is located at the bottom of the refrigerating chamber (2), forming a circulation path from top to bottom.

9. The air-cooled refrigerator with a refrigerated three-dimensional return air duct according to claim 1, characterized in that: The inlet (405) of the return air passage (42) is sealedly connected to the evaporator compartment (5) via the return air channel (62), and the cross-sectional area of ​​the return air channel (62) is larger than that of the supply air channel (61).

10. The air-cooled refrigerator with a refrigerated three-dimensional return air duct according to claim 1, characterized in that: The freezing air duct assembly (3) and the refrigeration air duct assembly (4) are both made of ABS engineering plastics, and the inner wall of the return air duct (42) is provided with guide ribs.

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