Upper-freezing and lower-storage single-circulation air-cooled refrigerator

Abstract

The invention provides an upper-freezing and lower-storage single-circulation air cooling refrigerator. Comprising a freezing air duct assembly, a refrigerating air duct assembly, a connecting air duct and a fruit and vegetable box assembly. The freezing air duct assembly communicates with the refrigerating air duct assembly through a connecting air duct. The refrigeration air duct assembly comprises an air supply path and an air return path; the air supply path is provided with an air outlet assembly, the air outlet assembly comprises a front air outlet and a lower air outlet, the front air outlet is located at the front top of the refrigeration air duct assembly, and the lower air outlet is located at the bottom of the refrigeration air duct assembly; the fruit and vegetable box assembly comprises a fruit and vegetable box and a fruit and vegetable box cover plate, and a gap is formed between the rear side of the fruit and vegetable box cover plate and the refrigerator container. According to the refrigerator, through reasonable air outlet layout and air distribution, the temperature difference of the top, bottom and side face areas of the refrigerating chamber is reduced, effective transmission of cold air and hot air between the freezing chamber and the refrigerating chamber is achieved through the connecting air duct, the cold air can smoothly flow into the fruit and vegetable box area through the gap design of the fruit and vegetable box cover plate and the refrigerator container, and the bottom temperature is reduced; the temperature uniformity is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of household appliances, and more specifically to a single-circulation air-cooled refrigerator with upper freezing and lower storage. Background Art

[0002] The design of a single-system air-cooled refrigerator with a top-freezer and bottom-store compartment features a refrigerator compartment at the bottom and a freezer compartment at the top. This layout allows users to customize their food storage needs while maintaining optimal internal space utilization.

[0003] In traditional top-freezer, bottom-store, single-system air-cooled refrigerators, the return air from the refrigerator compartment is typically located at the top of the compartment. Cool air flows from the freezer evaporator above, through a fan, and is then transported to the refrigerator compartment. However, this design presents a significant problem: the cool air cannot directly reach the bottom of the refrigerator compartment. Due to its high density, the natural tendency of cool air to sink creates a conflict with the top return air. If the fan's wind power is insufficient or the air outlet design is inappropriate, the cool air will not be evenly distributed throughout the refrigerator compartment, resulting in higher temperatures in the bottom area.

[0004] Furthermore, after the cold air exchanges heat in the refrigerator compartment, the hot air returns to the top of the compartment and enters the return air duct. This design can easily lead to higher temperatures at the top, further exacerbating the problem of uneven temperature distribution. The fruit and vegetable boxes at the bottom of the refrigerator compartment are typically well sealed and located in front of the compressor compartment. The heat generated by evaporation and respiration within these boxes can further increase local temperatures if the cold air circulation cannot be promptly dissipated. Summary of the Invention

[0005] In order to solve the above-mentioned problems of existing upper freezing and lower storage air-cooling refrigerators, the return air of the refrigerator compartment is usually located at the top of the compartment, the cold air cannot evenly cover the entire refrigerator compartment, and the temperature distribution at the bottom and top is uneven, which affects the refrigeration effect of the refrigerator and also affects the preservation quality of food.

[0006] The present application provides a single-circulation air-cooled refrigerator with upper freezing and lower storage, comprising: a box body, a freezing chamber, a refrigerating chamber, a freezing air duct assembly, a refrigerating air duct assembly, a connecting air duct, and a fruit and vegetable box assembly;

[0007] The freezing chamber is arranged at the upper part of the box body, and the refrigerating chamber is arranged at the lower part of the box body;

[0008] The freezing air duct assembly is located inside the freezing compartment, the refrigerating air duct assembly is located inside the refrigerating compartment, and the freezing air duct assembly and the refrigerating air duct assembly are connected via the connecting air duct;

[0009] The refrigeration air duct assembly includes a supply air duct and a return air duct;

[0010] The air supply duct is provided with an air outlet assembly, and the air outlet assembly includes a front air outlet and a lower air outlet, the front air outlet is located at the front top of the refrigeration duct assembly, and the lower air outlet is located at the bottom of the refrigeration duct assembly;

[0011] The air volume of the positive air outlet accounts for 20% to 25%, and the air volume of the lower air outlet accounts for 30% to 35%;

[0012] The inlet of the return air duct is arranged at the top of the refrigeration duct assembly and is connected to the top space of the refrigeration chamber;

[0013] The outlet of the return air passage is connected to the return air passage inlet of the connecting air duct; the return air passage outlet of the connecting air duct is connected to the bottom of the refrigeration evaporator compartment;

[0014] The fruit and vegetable box assembly includes a fruit and vegetable box and a fruit and vegetable box cover, wherein the fruit and vegetable box cover covers the top of the fruit and vegetable box, the rear side of the fruit and vegetable box cover is close to the box inner portion of the refrigeration chamber, and there is a gap between the rear side of the fruit and vegetable box cover and the box inner portion.

[0015] In a feasible implementation, the fruit and vegetable box is arranged at the bottom front side of the refrigerating chamber, the upper surface of the fruit and vegetable box cover is close to the bottom inner wall of the refrigerating chamber, and the rear side of the fruit and vegetable box cover is away from the rear wall of the fruit and vegetable box;

[0016] The gap between the rear side of the fruit and vegetable box cover and the box inner portion is in the range of 25 to 30 mm.

[0017] In a feasible implementation, the air outlet assembly further includes a side air outlet, which is located on the side of the refrigeration duct assembly. Cold air passes through the side wall of the refrigeration chamber 2 through the side air outlet to form an embracing circulation forward.

[0018] In a feasible implementation, the connecting air duct includes an air supply passage and an air return passage;

[0019] One end of the air supply passage is connected to the outlet of the freezing air duct assembly, and the other end is connected to the air supply passage inlet of the refrigeration air duct assembly;

[0020] One end of the return air channel is connected to the return air outlet of the refrigeration duct assembly, and the other end is connected to the bottom of the freezing evaporator compartment. Cold air flows from the freezing chamber to the refrigeration chamber through the supply air channel, and hot air returns through the return air channel.

[0021] In a feasible implementation, the refrigeration duct assembly further includes a refrigeration mask;

[0022] The refrigeration mask is arranged on the outside of the refrigeration air duct assembly, and the refrigeration air duct assembly is also provided with a top return air outlet. The top return air outlet is located on both sides of the refrigeration mask and is connected to the inlet of the return air duct.

[0023] In a feasible implementation, the positive air outlet is a rectangular opening and is arranged on the front side of the refrigeration air duct assembly near the top;

[0024] The lower air outlet is a slot-shaped opening and is arranged at the bottom of the refrigeration air duct assembly away from the top. The cold air covers the top of the refrigeration chamber through the positive air outlet and covers the fruit and vegetable box area at the bottom through the lower air outlet.

[0025] In a feasible implementation, the refrigeration air duct assembly includes: a refrigeration air duct;

[0026] The freezing evaporator compartment of the freezing chamber is provided with a freezing evaporator and a freezing fan;

[0027] The inlet of the freezing air path is connected to the freezing evaporator compartment, and the outlet of the freezing air path is connected to the air supply path of the connecting air duct.

[0028] In a feasible implementation, the air volume proportion of the side air outlet is higher than the air volume proportion of the front air outlet and the lower air outlet.

[0029] In a feasible implementation, the air supply passage includes a first air duct and a second air duct, and the first air duct and the second air duct are bonded by an auxiliary material viscose sponge.

[0030] In a feasible implementation, the outlet of the return air duct is arranged on the rear side of the refrigeration duct assembly near the top, and the outlet of the return air duct is connected to the return air channel of the connecting air duct, through which the hot air flows to the freezing evaporator chamber.

[0031] As can be seen from the above, this application provides a single-circulation air-cooled refrigerator with upper freezing and lower storage. By adjusting the air outlet pattern of the refrigerated air outlet and reasonably distributing the air volume, it can meet the air volume requirements of different areas of the compartment. The fruit and vegetable box component structure is designed to increase the matching distance between the fruit and vegetable box, the fruit and vegetable box cover, and the box liner to facilitate the flow of cold air into the fruit and vegetable box for cooling. The structure of the refrigerated air duct component satisfies the requirement of a complete air circulation path from top to bottom in the refrigerated compartment, ensuring good temperature uniformity in the compartment and a moderate temperature difference between the bottom fruit and vegetable box and the upper part of the compartment, thereby enhancing the market competitiveness of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the implementation of this application, and together with the specification, are used to explain the principles of the embodiments of this application. Obviously, the drawings described below are only some embodiments of the implementation of this application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without inventive effort.

[0033] Figure 1 This is a schematic diagram of the overall structure of a single-cycle air-cooled refrigerator with upper freezing and lower storage shown in an embodiment of the present application;

[0034] Figure 2 Schematic diagram of air circulation of a single-cycle air-cooled refrigerator with upper freezing and lower storage shown in an embodiment of the present application;

[0035] Figure 3 Schematic diagram of the structure of the refrigeration duct assembly shown in an embodiment of the present application;

[0036] Figure 4 It is a schematic diagram of the exploded structure of the refrigeration air duct assembly shown in an embodiment of the present application.

[0037] Description of Figure Numbers:

[0038] 100-cabinet; 1-freezer compartment; 2-refrigerator compartment; 3-refrigeration air duct assembly; 4-refrigeration air duct assembly; 5-refrigeration evaporator compartment; 6-connecting air duct; 11-refrigeration evaporator; 12-refrigeration fan; 21-cabinet liner; 31-refrigeration air duct; 41-supply air duct; 42-return air duct; 61-supply air duct; 71-fruit and vegetable box cover; 72-fruit and vegetable box; 401-refrigeration mask; 402-first air duct; 403-second air duct; 404-viscose sponge; 411-front air outlet; 412-side air outlet; 413-lower air outlet; 414-top return air outlet. DETAILED DESCRIPTION

[0039] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make the present application embodiments more comprehensive and complete and to fully convey the concepts of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, many specific details are provided to provide a full understanding of the implementation of the embodiments of the present application.

[0040] In a top-freeze, bottom-store, single-system air-cooled refrigerator, the refrigerator compartment is located at the bottom and the freezer compartment is located at the top. Traditionally, the return air from the refrigerator compartment is located at the top of the compartment. Cold air is pumped from the freezer compartment evaporator to the refrigerator compartment via a fan, but it cannot reach the bottom of the compartment directly, causing temperatures to rise at the bottom. After the cold air exchanges heat in the refrigerator compartment, the hot air returns to the top of the compartment and enters the return air duct, which can easily cause temperatures to rise at the top. Furthermore, improperly designed refrigerator ducts, such as low top airflow, can also cause high top temperatures. This is because cold air has a high density and a natural tendency to sink, which conflicts with the return air at the top. If the fan is insufficient or the air outlet is poorly designed, the cold air cannot evenly cover the entire refrigerator compartment, and temperatures at the bottom may rise. The fruit and vegetable bins at the bottom are typically tightly sealed and located in front of the compressor compartment. If the heat generated by evaporation and respiration cannot be promptly dissipated through the cold air circulation, this can exacerbate localized temperature increases.

[0041] In order to solve the above problems, the present application provides a single-cycle air-cooled refrigerator with upper freezing and lower storage. Figures 1-4 As shown, the upper portion of the box body 100 is a freezing chamber 1, and the lower portion is a refrigerating chamber 2.

[0042] The freezing air duct assembly 3 is installed inside the freezing chamber 1, and the refrigerating air duct assembly 4 is located inside the refrigerating chamber 2, and the two are connected by the connecting air duct 6. The refrigerating air duct assembly 4 includes a supply air duct 41 and a return air duct 42. The supply air duct 41 is provided with a front air outlet 411 and a lower air outlet 413. The front air outlet 411 is located at the top of the front of the refrigerating air duct assembly 4, and the lower air outlet 413 is located at its bottom. The inlet of the return air duct 42 is at the top of the refrigerating air duct assembly 4, and the outlet is connected to the bottom of the freezing evaporator compartment 5 through the return air channel of the connecting air duct 6. In the fruit and vegetable box assembly, the fruit and vegetable box 72 is placed on the front side of the bottom of the refrigerating chamber 2, and the fruit and vegetable box cover 71 covers the top of the fruit and vegetable box 72. The rear side of the fruit and vegetable box is close to the box liner 21 of the refrigerating chamber 2, and there is a gap between the box liner 21 and the fruit and vegetable box.

[0043] Specifically, the cabinet 100 is the overall structure of the refrigerator, which is divided into freezing and refrigerating spaces. The freezer compartment 1 is used for frozen storage of food, and the refrigerating compartment 2 is used for refrigerated storage. The freezing air duct assembly 3 is responsible for transporting the coldness of the freezing evaporator compartment 5 to the freezer compartment 1. The refrigerating air duct assembly 4 distributes the coldness to each area of ​​the refrigerating compartment 2, the supply air duct 41 transports cold air, and the return air duct 42 recovers the hot air after heat exchange. The connecting air duct 6 realizes the transmission of cold air between the freezer compartment 1 and the refrigerating compartment 2. The positive air outlet 411 mainly supplies air to the top area of ​​the refrigerating compartment 2, and the lower air outlet 413 focuses on covering the bottom fruit and vegetable box area. The fruit and vegetable box 72 is used to store fruits and vegetables, and the gap between the fruit and vegetable box cover 71 and the box liner 21 facilitates the flow of cold air into the fruit and vegetable box area.

[0044] Furthermore, the air volume of the front air outlet 411 accounts for 20%-25%, and the air volume of the lower air outlet 413 accounts for 30%-35%.

[0045] It is understandable that the air volume ratio of the front air outlet 411 and the lower air outlet 413 has been optimized, which can more accurately meet the cooling demand of the top and bottom areas of the refrigeration chamber 2.

[0046] After the cooling energy from the evaporator compartment 5 is transported to the refrigeration duct assembly 4 via the freezing air duct assembly 3 and the connecting air duct 6, it is distributed to the front air outlet 411 and the lower air outlet 413 according to a set ratio. The front air outlet 411 covers the top area with 20%-25% of the air volume, and the lower air outlet 413 covers the fruit and vegetable box area at the bottom with 30%-35% of the air volume. The remaining cooling energy may be distributed through other air outlets to complete the cooling of the refrigerator compartment 2.

[0047] By allocating the proportion of air volume, this embodiment further solves the problem of different cooling requirements in different areas. The top area has relatively small space and requires less cooling capacity. An air volume of 20%-25% can avoid over-cooling. The fruit and vegetable box area at the bottom stores more food and is easily affected by external heat exchange. An air volume of 30%-35% is required to ensure sufficient cooling effect, thereby balancing the temperature of each area. By reasonably allocating the air volume, cooling capacity is supplied on demand in different areas, achieving uniform control of the overall temperature. The temperature uniformity in the cold storage room 2 is further improved, so that the temperature in each area is closer to the set value, thereby improving the quality of food preservation.

[0048] The refrigerator cycle in this embodiment is as follows: the cooling air generated by the freezing evaporator compartment 5 enters the freezing air path 31 of the freezing air duct assembly 3 under the action of the freezing fan 12, and is then transported through the supply air path 61 connected to the air duct 6 to the supply air path 41 of the refrigeration air duct assembly 4. The cooling air then enters the refrigeration compartment 2 through the front air outlet 411 and the lower air outlet 413, covering the top and bottom areas, respectively. After heat exchange within the refrigeration compartment 2, the cooling air is converted into hot air, which then flows from the top of the refrigeration air duct assembly 4 through the return air path 42 inlet and into the return air path 42. The air then flows back to the bottom of the freezing evaporator compartment 5 through the return air channel connected to the air duct 6, completing the cycle.

[0049] This embodiment solves the problem of uneven temperatures at the top and bottom of the refrigerator compartment 2 by using the freezing air duct assembly 3. The top of the refrigerator compartment of a traditional refrigerator is prone to rising temperatures due to the accumulation of hot air, while the temperature of the fruit and vegetable box area at the bottom is relatively high due to insufficient cold air coverage. This embodiment provides a positive air outlet 411 and a lower air outlet 413 to precisely supply air to the top and bottom areas, respectively, thereby improving the temperature unevenness. At the same time, the gap design between the fruit and vegetable box cover 71 and the box liner 21 allows cold air to flow smoothly into the fruit and vegetable box area, reducing the temperature at the bottom.

[0050] This embodiment achieves uniform distribution and circulation of cold air within the refrigeration chamber 2 by designing a rational air duct structure and air outlet layout. The flow of cold air removes heat, making the temperature of each area within the refrigeration chamber 2 uniform. This ensures good temperature uniformity within the refrigeration compartment, reduces the temperature difference between the fruit and vegetable box at the bottom and the upper part of the compartment, and allows fruits and vegetables to be stored at a more suitable temperature, extending their freshness.

[0051] In some embodiments of the present application, the fruit and vegetable box 72 is located on the front side of the bottom of the refrigerating chamber 2, the upper surface of the fruit and vegetable box cover 71 is close to the inner wall of the bottom of the refrigerating chamber 2, and its rear side is away from the rear wall of the fruit and vegetable box 72. The gap between the rear side of the fruit and vegetable box cover 71 and the box liner 21 is in the range of 25-30 mm.

[0052] Among them, the fruit and vegetable box 72 provides storage space for fruits and vegetables, and the fruit and vegetable box cover 71 plays a covering and protection role. At the same time, the gap with the box liner 21 forms a cold air channel to facilitate the flow of cold air into the fruit and vegetable box area.

[0053] After the cold air is blown out from the lower air outlet 413, some of it enters the fruit and vegetable box area through the gap between the rear side of the fruit and vegetable box cover 71 and the box liner 21, cooling the fruits and vegetables. The gap is 25-30mm in size, which ensures that the cold air can flow in smoothly without causing excessive loss of cooling energy due to an excessive gap.

[0054] In traditional designs, the gap between the fruit and vegetable box cover and the box liner is too small, making it difficult for cold air to enter, resulting in higher temperatures in the fruit and vegetable box area. This embodiment controls the gap to 25-30mm, forming an effective cold air channel, allowing cold air to fully enter the fruit and vegetable box area and lower the temperature. The appropriate gap size can reduce the resistance to cold air flow, allowing cold air to flow smoothly into the fruit and vegetable box area due to the pressure difference. This effectively lowers the temperature in the fruit and vegetable box area, reduces the temperature difference between this area and other areas of the refrigeration chamber 2, and provides a more stable fruit and vegetable storage environment.

[0055] In some embodiments of the present application, the air outlet assembly further includes a side air outlet 412 located on the side of the refrigeration duct assembly 4. The side air outlet 412 can assist in distributing the cold air through the side wall of the refrigeration chamber 2 to form an embracing circulation forward, thereby expanding the coverage of the cold air.

[0056] During actual use, after the cold air enters the air supply path 41, in addition to being blown out from the front air outlet 411 and the lower air outlet 413, part of the cold air can also pass through the side wall of the cold storage room 2 from the side air outlet 412 to cool the side wall area of ​​the cold storage room 2. The side wall area of ​​the conventional cold storage room 2 has the problem of insufficient cold air coverage. Relying solely on the front air outlet 411 and the lower air outlet 413, the side wall area may not receive enough cooling due to the long distance. In this embodiment, the side air outlet 412 is provided to supplement the cooling capacity of the area, and the cold surface continues to move forward after passing through the side wall to form an embracing circulation, so that the cold air can reach every corner of the cold storage room 2, and the cold air in the cold storage room 2 is more evenly distributed, and the temperature difference between each area is further reduced, thereby improving the overall cooling effect.

[0057] In some embodiments of the present application, the connecting air duct 6 includes a supply air path 61 and a return air path. One end of the supply air path 61 is connected to the outlet of the refrigeration air duct assembly 3, and the other end is connected to the inlet of the supply air path 41 of the refrigeration air duct assembly 4; one end of the return air path is connected to the outlet of the return air path 42 of the refrigeration air duct assembly 4, and the other end is connected to the bottom of the refrigeration evaporator compartment 5.

[0058] Specifically, the supply air path 61 is responsible for transporting the cold air from the freezer compartment 1 to the refrigerator compartment 2, while the return air duct is responsible for returning the hot air from the refrigerator compartment 2 back to the evaporator compartment 5. The refrigeration fan 12 blows the cold air from the evaporator compartment 5 into the freezing air path 31. The cold air then flows through the supply air path 61 into the supply air path 41 of the refrigeration duct assembly 4, and then into the refrigerator compartment 2 through the various air outlets. After heat exchange, the cold air is converted into hot air, which then flows through the return air path 42 into the return air duct and back to the bottom of the evaporator compartment 5, completing the cycle.

[0059] This embodiment achieves single-circuit air cooling through the air supply duct 61 and the return air channel. The connected air duct 6 enables one-way transmission of cold and hot air, forming an effective circulation system that circulates cooling energy between the two compartments. This simplifies the refrigerator structure and reduces costs while ensuring cooling performance and improving energy efficiency.

[0060] In some embodiments of the present application, the refrigeration duct assembly 4 also includes a refrigeration mask 401, which is arranged on the outside of the refrigeration duct assembly 4. The refrigeration duct assembly 4 is also provided with a top return air outlet 414, which is located on both sides of the refrigeration mask 401 and is connected to the interior of the return air duct 42.

[0061] The refrigeration hood 401 protects the internal structure of the refrigeration duct assembly 4 and guides the flow of cold air. The top return air vent 414 collects hot air from the top of the refrigeration chamber 2. After the cold air enters the refrigeration chamber 2 from the air outlet, it exchanges heat in the top area. The hot air rises to the top of the refrigeration hood 401, passes through the top return air vent 414, enters the return air path 42, and then flows back to the bottom of the refrigeration evaporator compartment 5 through the connecting air duct 6, forming a complete air circulation system.

[0062] In this embodiment, top return air vents 414 are positioned on either side of the refrigeration hood 401, near the hot air collection area, to facilitate efficient hot air recovery. Since hot air rises, the top of the refrigeration duct assembly 4 is where hot air tends to collect. Providing top return air vents 414 there improves hot air recovery efficiency and accelerates cold air circulation.

[0063] In some embodiments of the present application, the positive air outlet 411 is a rectangular opening, which is arranged on the front side of the refrigeration duct assembly 4 near the top; the lower air outlet 413 is a slot-shaped opening, which is arranged on the bottom side of the refrigeration duct assembly 4 away from the top.

[0064] It is understandable that air outlets of different shapes have different effects on the diffusion and direction of airflow. Rectangular openings concentrate the jet, while slot-shaped openings have a wide diffusion range. Therefore, the rectangular opening shape of the positive air outlet 411 facilitates the control of wind direction and air volume, covering the top area of ​​the refrigeration chamber 2 with cold air; while the slot-shaped opening of the lower air outlet 413 can expand the air outlet range to cover the fruit and vegetable box area at the bottom. When cold air enters from the air supply air path 41, the positive air outlet 411 blows the cold air evenly toward the top of the refrigeration chamber 2 in the form of a rectangular opening, while the lower air outlet 413 blows the cold air more widely toward the fruit and vegetable box area at the bottom with a slot-shaped opening. Different cooling needs for different areas can be met through the opening shape.

[0065] In some embodiments of the present application, the refrigeration air duct assembly 3 includes a refrigeration air duct 31. The refrigeration evaporator compartment 5 of the freezer compartment 1 is provided with a refrigeration evaporator 11 and a refrigeration fan 12. The inlet of the refrigeration air duct 31 is connected to the refrigeration evaporator compartment 5, and the outlet of the refrigeration air duct 31 is connected to the air supply duct 61 of the air duct 6.

[0066] The refrigeration fan 12 is used to provide power to blow the cold air generated by the refrigeration evaporator 11 into the refrigeration air duct 31; the refrigeration air duct 31 then transports the cold air to the connecting air duct 6. When the refrigeration fan 12 is started, the cold air inside the refrigeration evaporator compartment 5 is drawn into the refrigeration air duct 31, transported through the refrigeration air duct 31 to the air supply duct 61 of the connecting air duct 6, and then enters the refrigeration air duct assembly 4, completing the transfer of cold air from the freezer compartment 1 to the refrigerator compartment 2.

[0067] In some embodiments of the present application, the air volume proportion of the side air outlet 412 is higher than the air volume proportion of the front air outlet 411 and the lower air outlet 413 .

[0068] Specifically, side air outlets 412 assist in air supply. When the air volume from front air outlet 411 accounts for 20% to 25% and the air volume from lower air outlet 413 accounts for 30% to 35%, the air volume from side air outlet 412 accounts for approximately 40% to 50%. It is understood that side air outlets 412 are generally distributed on both sides, meaning that the air volume from a single side is 20% to 25%. This air volume ratio ensures uniform air volume distribution overall. After cold air enters air supply path 41, the cooling capacity is distributed to front air outlet 411, lower air outlet 413, and side air outlet 412 according to their respective ratios, cooling the top, bottom, and side areas, respectively.

[0069] It is understandable that if the air volume from the side air outlet 412 is too large, it can easily lead to insufficient cooling capacity in the main area. In this embodiment, by controlling the overall air volume ratio of the side air outlet 412 to be slightly higher than that of the front air outlet 411 and the lower air outlet 413, and the single-side air volume ratio is more evenly distributed compared to the front air outlet 411 and the lower air outlet 413, while ensuring the cooling effect of the top and bottom areas, the air volume is reasonably distributed according to the cooling demand of each area, ensuring balanced cooling capacity in the areas, and thus improving the overall cooling effect.

[0070] In some embodiments of the present application, the air supply passage 41 includes a first air duct 402 and a second air duct 403 , and the first air duct 402 and the second air duct 403 are bonded together by an auxiliary material viscose sponge 404 .

[0071] The first air duct 402 and the second air duct 403 are arranged in layers above and below each other within the refrigeration duct assembly 4. The first air duct 402 is located near the inside of the refrigeration compartment, and the second air duct 403 is parallel and adjacent to it. The two are bonded together along their contact surface using an auxiliary material, viscose sponge 404. This bonding structure is located within the interior space of the refrigeration mask 401 and, together with the refrigeration mask 401, forms the complete refrigeration duct assembly 4.

[0072] The first air duct 402 and the second air duct 403 together form the physical cavity of the air supply path 41. The first air duct 402 is responsible for guiding the cold air to the front air outlet 411 and the side air outlet 412, while the second air duct 403 is responsible for guiding the cold air to the lower air outlet 413. Auxiliary viscose sponge 404 is used to fill the assembly gap between the first air duct 402 and the second air duct 403, ensuring the sealing of the air supply path 41 and preventing cold air leakage.

[0073] After entering supply air passage 41 from supply air passage 61 connected to air duct 6, cold air is divided within first air passage 402: some of the cold air flows through front air outlet 411 toward the upper space of refrigerator compartment 2, while some flows through side air outlet 412 to cover the side areas. The remaining cold air flows into second air passage 403 and is delivered directly to the fruit and vegetable drawer area at the bottom of refrigerator compartment 2 through lower air outlet 413. The sealing effect of viscose sponge 404 ensures that no air volume is lost during this diversion process.

[0074] In this embodiment, the use of auxiliary material, viscose sponge 404, to bond the first air duct 402 and the second air duct 403 effectively seals the air duct connection, reducing air leakage and improving air supply efficiency. The viscose sponge also provides a certain degree of sound insulation, reducing noise generated during device operation and improving the user experience. Furthermore, the bonding method simplifies the air duct assembly process, facilitating production and maintenance.

[0075] In some embodiments of the present application, the outlet of the return air duct 42 is located at the rear side of the refrigeration duct assembly 4 near the top, and the outlet of the return air duct 42 is connected to the return air channel connected to the air duct 6. The location of the outlet of the return air duct 42 facilitates the smooth entry of hot air into the return air channel connected to the air duct 6, thereby achieving effective recovery of the hot air.

[0076] The hot air in the refrigerating chamber 2 enters the return air duct 42 through the return air duct 42 entrance, flows out from the rear outlet near the top, enters the return air channel connected to the air duct 6, and then flows back to the bottom of the freezing evaporator chamber 5.

[0077] In this embodiment, the outlet of the return air passage 42 is located on the rear side of the refrigeration duct assembly 4 near the top, matching the position of the return air passage connected to the air duct 6, facilitating the smooth flow of hot air. Furthermore, the rational outlet location reduces resistance to hot air flow, improves recovery efficiency, and enhances the smoothness of hot air recovery, speeding up the circulation of cold air, stabilizing the temperature of the refrigeration compartment 2 more quickly, and improving cooling efficiency.

[0078] According to the contents of the above embodiments, it can be seen that when the single-cycle air-cooled refrigerator with upper freezing and lower storage provided by the present application is in use, the freezer compartment 1 and the refrigerator compartment 2 store foods that need to be frozen and refrigerated, respectively. When the refrigerator is in operation, the refrigeration fan 12 is started, and the cold air in the freezing evaporator compartment 5 is transported to the air supply duct 61 connected to the air duct 6 through the freezing air duct 31, and then enters the air supply duct 41 of the refrigeration duct assembly 4. The cold air is blown from the front air outlet 411, the lower air outlet 413 and the side air outlet 412 to the top, bottom and side areas of the refrigerator compartment 2, respectively, to cool each area. After heat exchange, the cold air becomes hot air, enters the return air duct 42 through the return air duct 42 inlet, and then flows back to the bottom of the freezing evaporator compartment 5 through the return air channel connected to the air duct 6, completing a cycle. This cycle is repeated continuously to keep the temperature in the refrigerator compartment 2 within the set range.

[0079] In summary, the single-circulation air-cooled refrigerator with upper freezing and lower storage provided by this application reduces the temperature difference between the top, bottom and side areas of the refrigerator compartment through a reasonable air outlet layout and air volume distribution, ensuring that food is stored at an appropriate temperature. The connecting air duct realizes the effective transmission of cold air and hot air between the freezer and the refrigerator compartment, forming a single-circulation air-cooling system, which simplifies the structure while improving energy efficiency. The gap design between the fruit and vegetable box cover and the box liner allows cold air to flow smoothly into the fruit and vegetable box area, lowering the bottom temperature and reducing the deterioration of fruits and vegetables due to uneven temperature. The reasonable positions and connection relationships of the various structures of the refrigerator and the scientific air volume distribution further ensure the long-term stable operation of the refrigerator and provide users with a high-quality food storage environment.

[0080] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the disclosure herein. 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 common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the following claims.

Claims

1. A single-cycle air-cooled refrigerator with upper freezing and lower storage, 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), a connecting air duct (6), and a fruit and vegetable box assembly; The freezing chamber (1) is arranged at the upper part of the box body (100), and the refrigerating chamber (2) is arranged at the lower part of the box body (100); The freezing air duct assembly (3) is located inside the freezing chamber (1), the refrigerating air duct assembly (4) is located inside the refrigerating chamber (2), 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) includes an air supply duct (41) and an air return duct (42); The air supply passage (41) is provided with an air outlet assembly, the air outlet assembly comprising a front air outlet (411) and a lower air outlet (413), the front air outlet (411) being located at the front top of the refrigeration air duct assembly (4), and the lower air outlet (413) being located at the bottom of the refrigeration air duct assembly (4); The air volume of the front air outlet (411) accounts for 20% to 25%, and the air volume of the lower air outlet (413) accounts for 30% to 35%; The inlet of the return air passage (42) is arranged at the top of the refrigeration air duct assembly (4) and is connected to the top space of the refrigeration chamber (2); The outlet of the return air passage (42) is connected to the return air channel inlet of the connecting air duct (6); the return air channel outlet of the connecting air duct (6) is connected to the bottom of the freezing evaporator compartment (5); The fruit and vegetable box assembly comprises a fruit and vegetable box (72) and a fruit and vegetable box cover (71), wherein the fruit and vegetable box cover (71) covers the top of the fruit and vegetable box (72), the rear side of the fruit and vegetable box cover (71) is close to the box liner (21) of the refrigeration chamber (2), and there is a gap between the rear side of the fruit and vegetable box cover (71) and the box liner (21).

2. The upper freezing and lower storing single-circulation air-cooling refrigerator according to claim 1, characterized in that: The fruit and vegetable box (72) is arranged at the bottom front side of the refrigerating chamber (2), the upper surface of the fruit and vegetable box cover (71) is close to the bottom inner wall of the refrigerating chamber (2), and the rear side of the fruit and vegetable box cover (71) is away from the rear wall of the fruit and vegetable box (72); The gap between the rear side of the fruit and vegetable box cover (71) and the box liner (21) is in the range of 25 to 30 mm.

3. The single-cycle air-cooled refrigerator with upper freezing and lower storage according to claim 1, characterized in that: The air outlet assembly further comprises a side air outlet (412), which is located on the side of the refrigeration air duct assembly (4), and the cold air passes through the side air outlet (412) and the side wall of the refrigeration chamber (2) to form an embracing circulation forward.

4. The upper freezing and lower storing single-circulation air-cooling refrigerator according to claim 1, characterized in that: The connecting air duct (6) includes an air supply passage (61) and an air return passage; One end of the air supply passage (61) is connected to the outlet of the freezing air duct assembly (3), and the other end is connected to the inlet of the air supply passage (41) of the refrigeration air duct assembly (4); One end of the return air channel is connected to the return air path (42) outlet of the refrigeration air duct assembly (4), and the other end is connected to the bottom of the freezing evaporator compartment (5). Cold air flows from the freezing chamber (1) to the refrigeration chamber (2) through the supply air path (61), and hot air returns through the return air channel.

5. The upper freezing and lower storing single cycle air cooling refrigerator according to claim 1, characterized in that: The refrigeration air duct assembly (4) further includes a refrigeration mask (401); The refrigeration mask (401) is arranged on the outside of the refrigeration duct assembly (4), and the refrigeration duct assembly (4) is also provided with a top return air outlet (414). The top return air outlet (414) is located on both sides of the refrigeration mask (401) and is connected to the inlet of the return air duct (42).

6. The single-cycle air-cooled refrigerator with upper freezing and lower storage according to claim 1, characterized in that: The front air outlet (411) is a rectangular opening and is arranged on the front side of the refrigeration air duct assembly (4) near the top; The lower air outlet (413) is a slot-shaped opening and is arranged at the bottom of the refrigeration air duct assembly (4) away from the top. Cold air covers the top of the refrigeration chamber (2) through the positive air outlet (411) and covers the fruit and vegetable box area at the bottom through the lower air outlet (413).

7. The upper freezing and lower storing single cycle air cooling refrigerator according to claim 1, characterized in that: The freezing air duct assembly (3) comprises: a freezing air duct (31); A freezing evaporator (11) and a freezing fan (12) are provided in the freezing evaporator compartment (5) of the freezing chamber (1); The inlet of the freezing air path (31) is connected to the freezing evaporator compartment (5), and the outlet of the freezing air path (31) is connected to the air supply path (61) of the connecting air duct (6).

8. The single-cycle air-cooled refrigerator with upper freezing and lower storage function according to claim 3, characterized in that: The air volume proportion of the side air outlet (412) is higher than the air volume proportion of the front air outlet (411) and the lower air outlet (413).

9. The upper freezing and lower storing single cycle air cooling refrigerator according to claim 1, characterized in that: The air supply passage (41) comprises a first air duct (402) and a second air duct (403), and the first air duct (402) and the second air duct (403) are bonded together by an auxiliary material viscose sponge (404).

10. The upper freezing and lower storing single cycle air cooling refrigerator according to claim 1, characterized in that: The outlet of the return air passage (42) is arranged on the rear side of the refrigeration air duct assembly (4) near the top, and the outlet of the return air passage (42) is connected to the return air channel of the connecting air duct (6), through which the hot air flows to the freezing evaporator compartment (5).

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