Refrigerator with multi-temperature zone independent temperature control function

Abstract

The application provides a refrigerator with a multi-temperature zone independent temperature control function, and relates to the technical field of refrigeration equipment. The refrigerator comprises a refrigeration box body, the refrigeration box body comprises a refrigeration space and an air duct assembly arranged at the back of the refrigeration space. The refrigeration space comprises a first refrigeration special zone, a second refrigeration special zone and a third refrigeration special zone. The air duct assembly comprises a first air duct, a second air duct, a third air duct, a first air door and a second air door. The first air door is arranged at the upstream of the first air duct and the second air duct and is used for controlling air supply of the first refrigeration special zone and the second refrigeration special zone. The second air door is arranged at the upstream of the third air duct and is used for controlling air supply of the third refrigeration special zone. The second refrigeration special zone is provided with a second return air port, and the third refrigeration special zone is provided with a third return air port. The second return air port and the third return air port are respectively communicated with a return air end of the air duct assembly. The application realizes independent temperature control of multiple refrigeration special zones through three independent air ducts cooperating with double air doors.

Description

Technical Field

[0001] This application relates to the field of refrigeration equipment technology, and in particular to a refrigerator with independent temperature control function for multiple temperature zones. Background Technology

[0002] As a core appliance for household food storage, refrigerators face increasingly diverse and sophisticated consumer demands for food preservation. Refrigerators need multiple temperature zones to meet the storage requirements of different foods, and each zone needs precise temperature control. To improve the division and control of internal temperature zones, existing technologies have developed solutions involving multiple independent refrigeration zones or independent temperature control systems within the refrigerator.

[0003] In the prior art, there is a refrigerator with a fresh-keeping drawer at the bottom of the refrigeration compartment. The fresh-keeping drawer is isolated from the refrigeration compartment by a sealed cavity, and a humidity-regulating membrane is installed inside the drawer to regulate humidity. There is also a refrigerator with a variable-temperature drawer in its refrigeration compartment. The variable-temperature drawer is connected to the main air duct of the refrigeration compartment through an independent air duct, and the air intake of the variable-temperature drawer is controlled by opening and closing a damper.

[0004] However, the existing solutions described above are insufficient to achieve a duct layout that allows for coordinated airflow control between two refrigerated zones while other refrigerated zones can be controlled independently. Conventional solutions either require each zone to have its own independent air damper, resulting in a complex and costly structure, or multiple zones to share a single air damper, making it impossible to adjust airflow in different zones. The airflow from each refrigerated zone is mutually restrictive, and crosstalk in the return airflow is prone to occur, leading to large temperature fluctuations. This makes it difficult to achieve stable and precise independent temperature control across multiple refrigerated zones simultaneously, and thus fails to meet the sophisticated preservation needs of diverse food products. Summary of the Invention

[0005] This application provides a refrigerator with multi-zone independent temperature control to solve the technical problem of large temperature fluctuations and inability to accurately and independently control the temperature of multiple refrigeration zones in existing refrigerators. To achieve the above objective, this application provides a refrigerator with multi-zone independent temperature control, comprising: A refrigerated cabinet, the refrigerated cabinet comprising: a refrigerated space and an air duct assembly disposed at the back of the refrigerated space; The refrigerated space includes: a first refrigerated area, a second refrigerated area, and a third refrigerated area, wherein the second refrigerated area and the third refrigerated area are located below the first refrigerated area; The air duct assembly includes: a first air duct, a second air duct, and a third air duct; The air outlet of the first air duct is connected to the first refrigerated area, the air outlet of the second air duct is connected to the second refrigerated area, and the air outlet of the third air duct is connected to the third refrigerated area. The air duct assembly further includes: a first air damper and a second air damper, wherein the first air damper is disposed upstream of the first air duct and the second air duct, and the first air damper is used to control the air supply to the first refrigerated area and the second refrigerated area; the second air damper is disposed upstream of the third air duct, and the second air damper is used to control the air supply to the third refrigerated area. The second refrigerated area is provided with a second return air vent, and the third refrigerated area is provided with a third return air vent. The second return air vent and the third return air vent are respectively connected to the return air end of the air duct assembly.

[0006] Preferably, the refrigerated space further includes: a box base, a box cover, a middle partition, and a drawer. The box base and the box cover are fixedly connected and enclose a cavity. The middle partition is disposed in the cavity and divides the cavity into two chambers. The drawers are slidably disposed in the two chambers, and the drawers are respectively sealed to the opening ends of the corresponding chambers to form the second refrigerated area and the third refrigerated area.

[0007] Preferably, the second refrigerated compartment is provided with a first metal guide rail, and the third refrigerated compartment is provided with a second metal guide rail. The first metal guide rail and the second metal guide rail are respectively disposed on the box base, and the drawer is slidably installed in the corresponding cavity through the first metal guide rail and the second metal guide rail.

[0008] Preferably, a first sealing ring is provided between the drawer of the second refrigerated area and the opening end of the corresponding cavity, and a second sealing ring is provided between the drawer of the third refrigerated area and the opening end of the corresponding cavity. The first sealing ring and the second sealing ring are used to seal the gap between the drawer and the opening end of the corresponding cavity respectively when the drawer is closed.

[0009] Preferably, the second refrigerated area is provided with a first drawer cover, and the third refrigerated area is provided with a second drawer cover. The first drawer cover and the second drawer cover are both located below the box cover and respectively cover the top of the corresponding drawer.

[0010] Preferably, an air supply cavity is formed between the first drawer cover and the box cover, and the air supply cavity is connected to the second refrigerated area.

[0011] Preferably, the first drawer cover is provided with a second air outlet, and the second air duct is connected to the air supply cavity through the second air outlet.

[0012] Preferably, a third air outlet is provided in the third refrigerated area, and the third air outlet is located on the rear wall of the box base. The third air duct is connected to the third refrigerated area through the third air outlet.

[0013] Preferably, the first air duct has a first air outlet at its outlet end, and the first air outlet is connected to the first refrigerated area.

[0014] Preferably, the air duct assembly further includes a fan, which is disposed upstream of the first air duct, the second air duct and the third air duct, and is used to supply air to the first air duct, the second air duct and the third air duct.

[0015] As can be seen from the above technical solutions, this application provides a refrigerator with independent temperature control for multiple temperature zones. The refrigerator includes: a refrigerator body, which includes a refrigerator space and an air duct assembly disposed at the back of the refrigerator space; the refrigerator space includes a first refrigerator zone, a second refrigerator zone, and a third refrigerator zone, with the second and third refrigerator zones located below the first refrigerator zone; the air duct assembly includes a first air duct, a second air duct, a third air duct, a first air damper, and a second air damper; the first air damper is disposed upstream of the first and second air ducts and is used to control the air supply to the first and second refrigerator zones; the second air damper is disposed upstream of the third air duct and is used to control the air supply to the third refrigerator zone; the second refrigerator zone has a second return air vent, and the third refrigerator zone has a third return air vent, with the second and third return air vents respectively connected to the return air end of the air duct assembly. This application achieves independent temperature control for multiple refrigerated zones by using three independent air ducts and dual air damper control, combined with independent return air channels for each refrigerated zone, effectively improving the temperature control accuracy and stability of each refrigerated zone. Attached Figure Description

[0016] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a refrigerator structure with independent temperature control for multiple temperature zones provided in an embodiment of this application. Figure 2 A schematic diagram of the layout of the air duct assembly and air outlet with multi-temperature zone independent temperature control function provided in the embodiments of this application; Figure 3 A front structural diagram of an air duct assembly with multi-temperature zone independent temperature control function provided in an embodiment of this application; Figure 4 This is a schematic diagram of the reverse side structure of an air duct assembly with independent temperature control function in multiple temperature zones, provided in an embodiment of this application. Figure 5 An exploded structural diagram of the box base and box cover with multi-temperature zone independent temperature control function provided in the embodiments of this application; Figure 6 A schematic diagram of the internal structure of the second and third cold storage areas with independent temperature control for multiple temperature zones provided in the embodiments of this application; Figure 7 A schematic diagram of the assembly of the first drawer cover and the second air outlet of a refrigerator with multi-temperature zone independent temperature control function provided in the embodiments of this application.

[0018] Figure label: The components include: 1. Refrigerated cabinet; 11. Refrigerated space; 111. First refrigerated zone; 112. Second refrigerated zone; 1121. Second return air vent; 1122. First metal guide rail; 1123. First sealing ring; 1124. First drawer cover; 1125. Second air outlet; 113. Third refrigerated zone; 1131. Third return air vent; 1132. Second metal guide rail; 1133. Second sealing ring; 1134. Second drawer cover; 1135. Third air outlet; 114. Box base; 115. Box cover; 116. Middle partition; 117. Drawer; 12. Air duct assembly; 121. First air duct; 1211. First air outlet; 122. Second air duct; 123. Third air duct; 124. First air damper; 125. Second air damper; 126. Fan. Detailed Implementation

[0019] The embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described below do not represent all embodiments consistent with this application. They are merely examples of systems and methods consistent with some aspects of this application.

[0020] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0021] The terms "first," "second," "third," etc., are used to distinguish similar or related objects or entities, and do not necessarily imply a specific order or sequence, unless otherwise specified. It should be understood that such terms can be used interchangeably where appropriate.

[0022] The terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclude inclusion, for example, a product or device that includes a range of components is not necessarily limited to all of the components that are clearly listed, but may include other components that are not clearly listed or that are inherent to such product or device.

[0023] In the field of refrigeration equipment technology, refrigerators typically require multiple temperature zones to meet the storage requirements of different foods. In existing refrigerators, multiple refrigeration zones usually share a common air supply duct or damper control, causing the airflow of each zone to interfere with each other and preventing independent adjustment. This makes it difficult for each zone to independently reach its target temperature. Furthermore, when multiple refrigeration zones share a single return air duct, crosstalk occurs when return air at different temperatures converges at the return end, affecting the temperature control accuracy of each zone. Conventional solutions, where each zone has its own independent damper, result in complex structures and high costs. Conversely, multiple zones sharing a single damper prevents zone-specific airflow adjustment, making it difficult to achieve stable and precise independent temperature control for multiple refrigeration zones simultaneously.

[0024] To solve the above problems, see [link to relevant documentation]. Figures 1-5 This application provides a refrigerator with independent temperature control for multiple temperature zones, the refrigerator including a refrigerator body 1, a refrigerator space 11 and an air duct assembly 12.

[0025] The refrigerator body 1 serves as the main structure of the refrigerator. The refrigerator body 1 has a refrigerator space 11 inside. An air duct assembly 12 is located on the back of the refrigerator body 1. The air duct assembly 12 is used to deliver cold air to the refrigerator space 11.

[0026] The refrigerator compartment 11 is an enclosed space inside the refrigerator used for storing food. It includes a first refrigerator compartment 111, a second refrigerator compartment 112, and a third refrigerator compartment 113, with the second and third compartments located below the first compartment 111. The first refrigerator compartment 111 is the standard refrigeration area within the refrigerator compartment 11, used to meet the routine refrigeration storage needs of everyday food items. The temperature range of the first refrigerator compartment 111 is 2°C to 8°C, the second refrigerator compartment 112 is 0°C to 3°C, and the third refrigerator compartment 113 is -5.5°C to -1°C. The first refrigerator compartment 111 has a volume of 150L to 350L, the second refrigerator compartment 112 has a volume of 15L to 40L, and the third refrigerator compartment 113 has a volume of 15L to 40L. The three refrigerator compartments are independent of each other within the refrigerator compartment 11. The first refrigerated zone 111, the second refrigerated zone 112, and the third refrigerated zone 113 are each formed by independent cavity walls. Adjacent refrigerated zones are separated by partition structures and are not interconnected. Air in each refrigerated zone will not flow directly between adjacent refrigerated zones.

[0027] The air duct assembly 12 is fixedly installed at the back of the refrigerated compartment 11. The air duct assembly 12 includes a first air duct 121, a second air duct 122, and a third air duct 123. The air outlet of the first air duct 121 is connected to the first refrigerated compartment 111, the air outlet of the second air duct 122 is connected to the second refrigerated compartment 112, and the air outlet of the third air duct 123 is connected to the third refrigerated compartment 113. The air volume of the first air duct 121 accounts for 50% to 60% of the total air volume of the refrigeration compartment, the air volume of the second air duct 122 accounts for 15% to 25% of the total air volume of the refrigeration compartment, and the air volume of the third air duct 123 accounts for 20% to 30% of the total air volume of the refrigeration compartment. The three air ducts respectively deliver cold air to the corresponding refrigerated compartments, forming three independent air supply paths. The first air duct 121 includes four branch lines. The upper left and right branch lines of the first air duct 121 supply air to the upper layer of the first refrigerated zone 111 through the first air outlet 1211. The air volume of the upper left and right branch lines accounts for 15% to 25% of the total refrigeration air volume, respectively. The lower left and right branch lines of the first air duct 121 supply air to the middle layer of the first refrigerated zone 111 through the first air outlet 1211. The air volume of the lower left and right branch lines accounts for 3% to 10% of the total refrigeration air volume, respectively.

[0028] The air duct assembly 12 also includes a first damper 124 and a second damper 125. The first damper 124 is located upstream of the first air duct 121 and the second air duct 122, and is used to control the airflow through the first air duct 121 and the second air duct 122. When the first damper 124 is open, cold air simultaneously enters the first air duct 121 and the second air duct 122, supplying air to the first refrigerated zone 111 and the second refrigerated zone 112 respectively. When the first damper 124 is closed, the airflow through the first air duct 121 and the second air duct 122 simultaneously stops. The first damper 124 achieves synchronous control of the first refrigerated zone 111 and the second refrigerated zone 112 through a single damper. The second damper 125 is located upstream of the third air duct 123, and is used to control the airflow through the third air duct 123. The second damper 125 independently controls the opening and closing of the third air duct 123, and the air supply of the third refrigerated zone 113 is not affected by the status of the first damper 124.

[0029] The first refrigerator compartment 111 has a return air vent, the second refrigerator compartment 112 has a second return air vent 1121, and the third refrigerator compartment 113 has a third return air vent 1131. The return air vent in the first refrigerator compartment 111 is part of the refrigerator's own return air structure. The second and third return air vents 1121 and 1131 are connected to the return air end of the air duct assembly 12. Air from the three refrigerator compartments returns to the air duct assembly 12 through their respective return air vents, forming their own independent and complete air circulation paths. The return air from each refrigerator compartment is isolated from each other before returning to the air duct assembly 12 and does not mix.

[0030] It should be noted that when the refrigerator with multi-zone independent temperature control is working, cold air is generated by the air duct assembly 12 and distributed to the first air duct 121, the second air duct 122, and the third air duct 123. The first air damper 124 opens or closes according to the temperature control requirements of the first refrigeration zone 111 and the second refrigeration zone 112. When the first air damper 124 is open, cold air simultaneously enters the first air duct 121 and the second air duct 122. The cold air in the first air duct 121 enters the first refrigeration zone 111 through the air outlet of the first air duct 121. The cold air flows inside the first refrigeration zone 111 and exchanges heat with the food inside the first refrigeration zone 111. After absorbing heat, the temperature rises, and the heated air returns to the return air end of the air duct assembly 12 through the return air vent of the first refrigeration zone 111 (a conventional return air structure inherent in the refrigerator itself). Cold air from the second air duct 122 enters the second refrigerated zone 112 through its outlet. Inside the second refrigerated zone 112, the cold air flows and exchanges heat with the food, absorbing heat and rising in temperature. The warmer air then returns to the return air end of the air duct assembly 12 through the second return air vent 1121. The second damper 125 opens or closes according to the temperature control requirements of the third refrigerated zone 113. When the second damper 125 is open, cold air enters the third air duct 123. Cold air from the third air duct 123 enters the third refrigerated zone 113 through its outlet. Inside the third refrigerated zone 113, the cold air flows and exchanges heat with the food, absorbing heat and rising in temperature. The warmer air then returns to the return air end of the air duct assembly 12 through the third return air vent 1131. Each of the three refrigerated zones has its own independent air supply and return paths. The refrigeration cycles of the three refrigerated zones are independent of each other, and the temperature control of each refrigerated zone does not interfere with each other.

[0031] This embodiment provides a basic solution for independent temperature control of multiple refrigerated zones through three independent air ducts and dual damper control. The first damper 124 simultaneously controls the first air duct 121 and the second air duct 122, allowing the air supply to the first refrigerated zone 111 and the second refrigerated zone 112 to be uniformly controlled by a single damper, simplifying the damper control structure. The second damper 125 independently controls the third air duct 123, making the air supply to the third refrigerated zone 113 independent of the first refrigerated zone 111 and the second refrigerated zone 112, thus achieving independent temperature control for the third refrigerated zone 113. The first air duct 121, the second air duct 122, and the third air duct 123 are each independent, and the air supply paths of each duct do not intersect, ensuring that the cold air supply to each refrigerated zone does not affect each other. The return air vents 1121, 1121, and 1131 of the first refrigerated zone each have independent return air vents. The return air from each refrigerated zone does not mix before the return air end of the return air duct assembly 12, avoiding crosstalk between return air at different temperatures that could affect the temperature control accuracy of each refrigerated zone. The first refrigerated zone 111, the second refrigerated zone 112, and the third refrigerated zone 113 each form independent supply air paths and independent return air paths. The refrigeration cycles of the three refrigerated zones are independent of each other, and the temperature control of each refrigerated zone does not interfere with each other, achieving independent temperature control of multiple refrigerated zones.

[0032] In some embodiments, see Figure 5 and Figure 6 The second refrigerated compartment 112 and the third refrigerated compartment 113 are composed of a box base 114, a box cover 115, a middle partition 116, and a drawer 117. The box base 114 and the box cover 115 are fixedly connected and enclose to form a cavity. The middle partition 116 is disposed in the cavity and divides the cavity into two chambers. Drawers 117 are slidably disposed in the two chambers respectively, and the drawers 117 are respectively sealed to the opening end of the corresponding chamber to form the second refrigerated compartment 112 and the third refrigerated compartment 113.

[0033] Specifically, a box base 114 is located at the bottom of the refrigerated space 11, and a box cover 115 is located above the box base 114. The box cover 115 and the box base 114 are snap-fitted together, forming a cavity. A middle partition 116 is located inside the cavity and is snap-fitted to the box base 114 and the box cover 115, dividing the cavity formed by the box base 114 and the box cover 115 into two independent chambers. There are two drawers 117, each located in one of the two chambers. The drawers 117 are slidably positioned within the chambers and can be pulled forward or pushed backward along the direction of the cavity. The front panel of the drawer 117 has a double-layer hollow structure with a hollow thickness of 20 mm to 30 mm. A sealed fit is formed between drawer 117 and the opening end of the corresponding chamber. After two drawers 117 are sealed with the opening ends of their respective chambers, one chamber and the drawer 117 within it together form a second refrigerated zone 112, and the other chamber and the drawer 117 within it together form a third refrigerated zone 113. Gaps are provided between the rear, sides, and bottom of the drawer 117 in the second refrigerated zone 112 and the base 114, forming a return air channel. A second return air vent 1121 is located on the base 114 and communicates with the gaps. After cold air enters the second refrigerated zone 112 from the second air outlet 1125, the cold air flows through the food storage area inside the drawer 117. The heated air flows into the return air channel through the gaps in the rear, sides, and bottom of the drawer 117, and then returns to the return air end of the air duct assembly 12 via the second return air vent 1121.

[0034] In this embodiment, the box base 114 and the box cover 115 are snapped together to form a cavity. A partition 116 divides the cavity into two independent chambers. Two drawers 117 are slidably disposed in the two chambers and sealed to the openings of the corresponding chambers, forming a second refrigerated zone 112 and a third refrigerated zone 113, respectively. The remaining space in the refrigerated space 11, excluding the cavity formed by the box base 114 and the box cover 115, forms the first refrigerated zone 111. The first refrigerated zone 111, the second refrigerated zone 112, and the third refrigerated zone 113 each form an independent storage space. The air between the three refrigerated zones is not circulated, providing a structural basis for independent temperature control in each refrigerated zone. The front panel of drawer 117 adopts a double-layer hollow structure with a hollow thickness of 20 mm to 30 mm. The air inside the hollow layer forms a heat insulation barrier, reducing the transfer of cold air from the second refrigeration zone 112 and the third refrigeration zone 113 to the outside through the front panel of drawer 117, thus improving the heat preservation performance of drawer 117. The gaps between the rear, sides, and bottom of drawer 117 in the second refrigeration zone 112 and the box base 114 form a return air channel. The second return air vent 1121 is located on the box base 114 and communicates with the gap, ensuring that the air inside the second refrigeration zone 112 can return evenly through multiple directions of drawer 117, avoiding dead air zones and improving the temperature uniformity inside the second refrigeration zone 112.

[0035] In some embodiments, see Figure 5 The second refrigerated compartment 112 is provided with a first metal guide rail 1124, and the third refrigerated compartment 113 is provided with a second metal guide rail 1134. The first metal guide rail 1124 and the second metal guide rail 1134 are respectively set on the box base 114, and the drawer 117 is slidably installed in the corresponding cavity through the first metal guide rail 1124 and the second metal guide rail 1134.

[0036] Specifically, the first metal guide rail 1124 is fixedly mounted on the box base 114 in the corresponding cavity of the second refrigerated zone 112, and the second metal guide rail 1134 is fixedly mounted on the box base 114 in the corresponding cavity of the third refrigerated zone 113. The first metal guide rail 1124 extends along the depth direction of the cavity, and the second metal guide rail 1134 extends along the depth direction of the cavity. The bottom of the drawer 117 slides in cooperation with the first metal guide rail 1124 and the second metal guide rail 1134. The drawer 117 slides forward along the depth direction of the cavity to the pulled-out position via the first metal guide rail 1124 and the second metal guide rail 1134, and slides backward along the depth direction of the cavity to the closed position via the first metal guide rail 1124 and the second metal guide rail 1134. The self-locking force of the first metal guide rail 1124 and the second metal guide rail 1134 is 5 to 15 Newtons. When the drawer 117 slides to the closed position, the self-locking mechanism of the first metal guide rail 1124 and the second metal guide rail 1134 locks the drawer 117 in the closed position.

[0037] Specifically, the first sealing ring 1123 is disposed between the drawer 117 of the second refrigeration zone 112 and the opening end of the corresponding chamber. The first sealing ring 1123 is fixedly installed on the edge of the front panel of the drawer 117 and extends continuously along the circumference of the front panel of the drawer 117. The second sealing ring 1133 is disposed between the drawer 117 of the third refrigeration zone 113 and the opening end of the corresponding chamber. The second sealing ring 1133 is fixedly installed on the edge of the front panel of the drawer 117 and extends continuously along the circumference of the front panel of the drawer 117. Both the first sealing ring 1123 and the second sealing ring 1133 are made of silicone rubber, and their Shore hardness is 20 to 50. When the drawer 117 slides along the cavity to the closed position, the first sealing ring 1123 and the second sealing ring 1133 are respectively clamped between the front panel of the drawer 117 and the opening edge of the corresponding cavity. The first sealing ring 1123 and the second sealing ring 1133 undergo elastic deformation and fill the gap between the front panel of the drawer 117 and the opening edge of the corresponding cavity.

[0038] In this embodiment, a first sealing ring 1123 is disposed between the drawer 117 of the second refrigerated compartment 112 and the opening end of the corresponding chamber, and a second sealing ring 1133 is disposed between the drawer 117 of the third refrigerated compartment 113 and the opening end of the corresponding chamber. When the drawer 117 is closed, this seals the drawer 117 with the chamber opening, preventing cold air leakage and hot air intrusion, thus ensuring the sealing performance of the second and third refrigerated compartments 112 and 113. The first and second sealing rings, made of silicone rubber, maintain good elasticity and sealing performance at low temperatures. Their Shore hardness range of 20 to 50 allows them to provide sufficient support while maintaining good deformation capacity, effectively filling the gap between the front panel of the drawer 117 and the edge of the chamber opening, ensuring reliable sealing.

[0039] In some embodiments, see Figure 6 The second refrigerated area 112 is provided with a first drawer cover 1123, and the third refrigerated area 113 is provided with a second drawer cover 1133. The first drawer cover 1123 and the second drawer cover 1133 are both located below the box cover 115 and respectively cover the top of the corresponding drawer 117.

[0040] Specifically, the first drawer cover 1123 is positioned above the drawer 117 of the second refrigerated compartment 112, covering the top opening of the drawer 117. The second drawer cover 1133 is positioned above the drawer 117 of the third refrigerated compartment 113, covering the top opening of the drawer 117. Both the first and second drawer covers 1123 are located below the box cover 115. The height of the cavity formed between the box cover 115 and the first drawer cover 1123 is 35 mm to 50 mm, and the height of the cavity formed between the box cover 115 and the second drawer cover 1133 is 35 mm to 50 mm. The first drawer cover 1123 is inclined at 1 to 2 degrees from front to back, and the second drawer cover 1133 is inclined at 1 to 2 degrees from front to back. The first drawer cover 1123 and the second drawer cover 1133 both have return air vents along their sides. The area of ​​the return air vents on the first drawer cover 1123 is larger than the area of ​​the second air outlet 1125, and the area of ​​the return air vents on the second drawer cover 1133 is larger than the area of ​​the third air outlet 1135. The upper surface of the first drawer cover 1123 is covered with insulating sponge, which covers its entire upper surface. The upper surface of the second drawer cover 1133 is also covered with insulating sponge, which covers its entire upper surface. The lower surface of the box cover 115 is covered with insulating sponge, which covers its entire lower surface.

[0041] In this embodiment, a first drawer cover 1123 and a second drawer cover 1133 are respectively installed over the corresponding drawers 117, sealing the top openings of the drawers 117 and reducing the loss of cold air from the second and third refrigeration zones 112 and 113 through the top openings. The first drawer cover 1123 and the second drawer cover 1133 are inclined at 1 to 2 degrees from front to back. The inclined surface of the cover facilitates the flow of condensate backward, preventing condensate from accumulating at the front of the drawer cover. Return air vents are provided on both sides of the first drawer cover 1123 and the second drawer cover 1133. The area of ​​the return air vents is larger than that of the air outlets to ensure smooth return airflow and avoid excessive air circulation resistance. Insulating sponge covers the entire upper surface of the drawer cover, reducing heat exchange between the drawer cover and the box cover and improving insulation performance.

[0042] In some embodiments, see Figure 6 An air supply cavity is formed between the first drawer cover 1123 and the box cover 115, and the air supply cavity is connected to the second refrigerated area 112.

[0043] Specifically, the first drawer cover 1123 is positioned below the box cover 115, with a gap between the first drawer cover 1123 and the box cover 115. The space between the upper surface of the first drawer cover 1123 and the lower surface of the box cover 115 forms an air supply cavity. The front end of the air supply cavity is connected to the air outlet of the second air duct 122, and the cold air in the second air duct 122 enters the interior of the air supply cavity through the air outlet of the second air duct 122. The air supply cavity extends along the depth of the second refrigerated compartment 112, and its length matches the depth of the second refrigerated compartment 112, covering the entire top area of ​​the second refrigerated compartment 112. The cold air inside the air supply cavity enters the second refrigerated compartment 112 through the second air outlet 1125 on the first drawer cover 1123. A grid is installed at the second air outlet 1125, which is inclined towards the middle of the air supply cavity at an angle of 15 to 60 degrees. The grid guides the cold air inside the air supply cavity to flow towards the middle of the cavity, preventing the cold air from blowing directly downwards onto the food inside the second refrigeration compartment 112. Sponge is attached around the second air outlet 1125 to fill the gap between the second air outlet 1125 and the first drawer cover 1123, reducing cold air leakage at the edge of the second air outlet 1125. Simultaneously, the sponge insulates the edge of the second air outlet 1125, reducing the outward transfer of cold air through the edge of the second air outlet 1125. The direct airflow area of ​​the second air outlet 1125 is covered with insulating sponge. This insulating sponge covers the surface area of ​​the first drawer cover 1123 directly below the second air outlet 1125. The insulating sponge reduces the direct blowing of cold air onto the first drawer cover 1123, lowers the temperature gradient on the surface of the first drawer cover 1123, and improves the temperature uniformity inside the second refrigerated compartment 112. Insulating sponge is also attached to the back of the temperature sensor to insulate it from the heat conducted through the drawer cover 115.

[0044] In this embodiment, an air supply cavity is formed between the first drawer cover 1123 and the box cover 115. The air supply cavity is connected to the second refrigeration zone 112. The cold air in the second air duct 122 enters the air supply cavity through the air outlet of the second air duct 122 and flows along the depth direction of the second refrigeration zone 112 inside the air supply cavity. After the cold air is evenly distributed in the air supply cavity, it enters the interior of the second refrigeration zone 112 through the second air outlet 1125, avoiding the cold air from blowing directly onto the food inside the second refrigeration zone 112, thus achieving uniform air supply to the second refrigeration zone 112.

[0045] In some embodiments, a temperature sensor is embedded in the first drawer cover 1123. The temperature sensor is used to detect the temperature inside the second refrigerated compartment 112. The installation position of the temperature sensor avoids the direct airflow area of ​​the second air outlet 1125 and the dead zone of air circulation inside the second refrigerated compartment 112. Insulating foam covers the entire upper surface of the drawer cover and the entire lower surface of the box cover 115 to reduce heat exchange between the drawer cover and the box cover and improve insulation performance.

[0046] In this embodiment, an air supply cavity is formed between the first drawer cover 1123 and the box cover 115. The air supply cavity is connected to the second refrigeration zone 112. The cold air in the second air duct 122 enters the air supply cavity through the air outlet of the second air duct 122 and flows along the depth direction of the second refrigeration zone 112 inside the air supply cavity. The cold air is evenly distributed in the air supply cavity before entering the interior of the second refrigeration zone 112, avoiding the cold air from blowing directly onto the food inside the second refrigeration zone 112, thus achieving uniform air supply to the second refrigeration zone 112.

[0047] In some embodiments, see Figure 2 and Figure 7 The first drawer cover 1124 is provided with a second air outlet 1125, and the second air duct 122 is connected to the air supply cavity through the second air outlet 1125.

[0048] Specifically, a second air outlet 1125 is located on the surface of the first drawer cover 1124, extending through both the upper and lower sides of the first drawer cover 1124. The upper end of the second air outlet 1125 connects to the air supply cavity, and the lower end connects to the second refrigerated compartment 112. The length of the second air outlet 1125 is 30 mm to 50 mm, and the width is 15 mm to 30 mm. The air outlet of the second air duct 122 connects to the front end of the air supply cavity. Cold air in the second air duct 122 enters the air supply cavity through its air outlet, and cold air inside the air supply cavity enters the second refrigerated compartment 112 through the second air outlet 1125. The second air outlet 1125 is surrounded by sponge to fill the gap between the second air outlet 1125 and the first drawer cover 1124, reducing the leakage of cold air at the edge of the second air outlet 1125. At the same time, the sponge insulates the edge of the second air outlet 1125, reducing the outward transfer of cold air through the edge of the second air outlet 1125. The direct airflow area of ​​the second air outlet 1125 is covered with insulating sponge, which covers the surface area of ​​the first drawer cover 1124 directly below the second air outlet 1125. The insulating sponge reduces the direct blowing of cold air onto the first drawer cover 1124, lowers the temperature gradient on the surface of the first drawer cover 1124, and improves the temperature uniformity inside the second refrigerated compartment 112.

[0049] In this embodiment, a second air outlet 1125 is provided on the first drawer cover 1124. The second air duct 122 is connected to the air supply cavity through the second air outlet 1125. The cold air in the second air duct 122 enters the air supply cavity through the second air outlet 1125 and flows along the depth of the second refrigeration zone 112 inside the air supply cavity. After the cold air is evenly distributed in the air supply cavity, it enters the interior of the second refrigeration zone 112 through the second air outlet 1125, avoiding the cold air from blowing directly onto the food inside the second refrigeration zone 112, thus achieving uniform air supply to the second refrigeration zone 112. The sponge around the second air outlet 1125 reduces cold air leakage and cold energy transfer. The heat-insulating sponge in the direct air supply area of ​​the second air outlet 1125 reduces the direct blowing of cold air onto the first drawer cover 1124, improving the temperature uniformity inside the second refrigeration zone 112.

[0050] In some embodiments, see Figure 2 The third refrigerated zone 113 is equipped with a third air outlet 1135, which is located on the rear wall of the box base 114. The third air duct 123 is connected to the third refrigerated zone 113 through the third air outlet 1135.

[0051] Specifically, the third air outlet 1135 is located on the rear wall surface of the box base 114, penetrating the rear wall of the box base 114. The front end of the third air outlet 1135 connects to the internal space of the third refrigerated compartment 113, and the rear end of the third air outlet 1135 connects to the air outlet of the third air duct 123. The air outlet of the third air duct 123 extends to the rear wall of the box base 114, and the air outlet of the third air duct 123 connects to the rear end of the third air outlet 1135. The cold air in the third air duct 123 enters the third air outlet 1135 through the air outlet of the third air duct 123, and the cold air in the third air outlet 1135 enters the interior of the third refrigerated compartment 113 through the front end of the third air outlet 1135. The third air outlet 1135 is located at the rear of the third refrigerated zone 113. The location of the third air outlet 1135 is opposite to the internal space of the third refrigerated zone 113. The cold air in the third air duct 123 is horizontally sent into the interior of the third refrigerated zone 113 from the rear. A grid is installed at the third air outlet 1135 to guide the cold air in the third air duct 123 to disperse at the third air outlet 1135 before entering the interior of the third refrigerated zone 113.

[0052] In this embodiment, a third air outlet 1135 is disposed on the rear wall of the box base 114. A third air duct 123 is connected to the third refrigerated compartment 113 through the third air outlet 1135. The cold air in the third air duct 123 is sent into the interior of the third refrigerated compartment 113 from the rear through the third air outlet 1135, realizing independent air supply to the third refrigerated compartment 113. The grid at the third air outlet 1135 disperses the cold air into the interior of the third refrigerated compartment 113, preventing the cold air from being concentrated in a local area inside the third refrigerated compartment 113 and improving the temperature uniformity inside the third refrigerated compartment 113.

[0053] In some embodiments, a cold storage device is provided in the third refrigerated compartment 113. The cold storage device is located between the bottom of the cover plate 115 and the upper edge of the third air outlet 1135. The cold storage device includes a cold storage module and a temperature sensor. The temperature sensor is used to detect the temperature inside the third refrigerated compartment 113, and an insulating sponge is attached to the back of the temperature sensor. When the third air duct 123 delivers cold air, the cold storage device absorbs cold energy and stores it inside the cold storage module. When the third air duct 123 stops delivering cold air, the cold storage module slowly releases the stored cold energy into the third refrigerated compartment 113, maintaining a stable temperature inside the third refrigerated compartment 113. The temperature sensor of the cold storage device detects the temperature of the cold storage device or the temperature inside the third refrigerated compartment 113 in real time, providing an accurate temperature detection signal for refrigeration control.

[0054] In some embodiments, see Figure 4 The first air outlet 121 is provided at the air outlet end of the first air duct 121, and the first air outlet 1211 is connected to the first cold storage area 111.

[0055] Specifically, the first air outlet 1211 is located at the air outlet end of the first air duct 121. The first air outlet 1211 penetrates the wall of the air duct assembly 12. One end of the first air outlet 1211 communicates with the internal space of the first air duct 121, and the other end of the first air outlet 1211 communicates with the internal space of the first refrigerated compartment 111. Cold air in the first air duct 121 enters the first air outlet 1211 through the air outlet end of the first air duct 121, and cold air in the first air outlet 1211 enters the interior of the first refrigerated compartment 111 through the first air outlet 1211. The first air outlet 1211 is located at the back of the first refrigerated compartment 111, and the opening position of the first air outlet 1211 is opposite to the internal space of the first refrigerated compartment 111. Cold air in the first air duct 121 is sent into the interior of the first refrigerated compartment 111 from the back direction.

[0056] In this embodiment, the first air outlet 1211 is set at the air outlet end of the first air duct 121. The first air outlet 1211 is connected to the first cold storage area 111. The cold air in the first air duct 121 enters the interior of the first cold storage area 111 through the first air outlet 1211, so as to realize independent air supply to the first cold storage area 111.

[0057] In some embodiments, see Figure 4 The air duct assembly 12 also includes a fan 126, which is located upstream of the first air duct 121, the second air duct 122 and the third air duct 123. The fan 126 is used to supply air to the first air duct 121, the second air duct 122 and the third air duct 123.

[0058] Specifically, the fan 126 is fixedly installed inside the air duct assembly 12, and is located upstream of the first air duct 121, the second air duct 122, and the third air duct 123. The outlet side of the fan 126 is connected to the inlet ends of the first air duct 121, the second air duct 122, and the third air duct 123, respectively. After the fan 126 is started, it generates airflow, which enters the first air duct 121, the second air duct 122, and the third air duct 123 through the outlet side of the fan 126. The airflow in the first air duct 121 enters the first refrigerated zone 111 through the outlet end of the first air duct 121, the airflow in the second air duct 122 enters the second refrigerated zone 112 through the outlet end of the second air duct 122, and the airflow in the third air duct 123 enters the third refrigerated zone 113 through the outlet end of the third air duct 123. When fan 126 is running continuously, airflow is continuously delivered to the three refrigerated compartments through the three air ducts. When fan 126 stops running, airflow stops being delivered to the three refrigerated compartments through the three air ducts.

[0059] In this embodiment, a fan 126 is installed upstream of the first air duct 121, the second air duct 122, and the third air duct 123. The fan 126 delivers air to the first air duct 121, the second air duct 122, and the third air duct 123, providing the power source for the cold air delivery of the three air ducts. This ensures that the cold air can enter the three refrigerated zones through the three air ducts, thereby achieving independent air delivery to the three refrigerated zones.

[0060] In some embodiments, the refrigerator with multi-zone independent temperature control also includes refrigeration control rules. When the second refrigeration zone 112 requires cooling, the refrigerator's control system does not consider the temperature value detected by the temperature sensor in the first refrigeration zone 111, and directly controls the compressor to start cooling. After the first refrigeration zone 111 finishes cooling, if the temperature of the second refrigeration zone 112 is higher than the shutdown point, the control system controls the second air duct 122 to supplement cooling 1 to 3 times. When the refrigerator's refrigeration compartment 11 is defrosting, the control system controls the second air duct 122 to operate for 5 to 15 minutes.

[0061] In this embodiment, when the second refrigeration zone 112 has a cooling demand, the temperature of the first refrigeration zone 111 is not considered. This avoids the second refrigeration zone 112 not receiving cold air because the first refrigeration zone 111 has reached the set temperature and stopped cooling, thus ensuring that the cooling demand of the second refrigeration zone 112 is prioritized. After the first refrigeration zone 111 finishes cooling, if the temperature of the second refrigeration zone 112 is higher than the shutdown point, supplemental cooling is performed 1 to 3 times to ensure that the temperature of the second refrigeration zone 112 can be reduced to below the set shutdown point. This prevents the temperature of the second refrigeration zone 112 from remaining above the shutdown point for an extended period due to its small volume and limited cooling capacity. When defrosting begins, the second air duct 122 is opened for 5 to 15 minutes, using the heat generated during defrosting to introduce heat into the second refrigeration zone 112. This prevents the temperature of the second refrigeration zone 112 from becoming too low during defrosting and ensures the temperature stability of the second refrigeration zone 112 during the defrosting process.

[0062] The above specific embodiments further illustrate the purpose, technical solution and beneficial effects of this application. It should be understood that the above are only specific embodiments of this application and are not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made on the basis of the technical solution of this application should be included within the scope of protection of this application.

Claims

1. A refrigerator with independent temperature control for multiple temperature zones, characterized in that, include: The refrigerator body (1) includes: a refrigerator space (11) and an air duct assembly (12) disposed on the back of the refrigerator space (11). The refrigerated space (11) includes: a first refrigerated area (111), a second refrigerated area (112) and a third refrigerated area (113), wherein the second refrigerated area (112) and the third refrigerated area (113) are located below the first refrigerated area (111); The air duct assembly (12) includes: a first air duct (121), a second air duct (122), and a third air duct (123); The air outlet of the first air duct (121) is connected to the first cold storage area (111), the air outlet of the second air duct (122) is connected to the second cold storage area (112), and the air outlet of the third air duct (123) is connected to the third cold storage area (113). The air duct assembly (12) further includes: a first air damper (124) and a second air damper (125). The first air damper (124) is located upstream of the first air duct (121) and the second air duct (122), and is used to control the air supply of the first refrigerated zone (111) and the second refrigerated zone (112). The second air damper (125) is located upstream of the third air duct (123), and is used to control the air supply of the third refrigerated zone (113). The second cold storage area (112) is provided with a second return air vent (1121), and the third cold storage area (113) is provided with a third return air vent (1131). The second return air vent (1121) and the third return air vent (1131) are respectively connected to the return air end of the air duct assembly (12).

2. The refrigerator with multi-zone independent temperature control function according to claim 1, characterized in that, The refrigerated space (11) further includes: a box base (114), a box cover (115), a middle partition (116), and a drawer (117). The box base (114) is fixedly connected to the box cover (115) and encloses it to form a cavity. The middle partition (116) is disposed in the cavity and divides the cavity into two chambers. The drawer (117) is slidably disposed in each of the two chambers, and the drawer (117) is sealed to the opening end of the corresponding chamber to form the second refrigerated area (112) and the third refrigerated area (113) respectively.

3. The refrigerator with multi-temperature zone independent temperature control function according to claim 2, characterized in that, The second refrigerated area (112) is provided with a first metal guide rail (1122), and the third refrigerated area (113) is provided with a second metal guide rail (1132). The first metal guide rail (1122) and the second metal guide rail (1132) are respectively set on the box base (114), and the drawer (117) is slidably installed in the corresponding cavity through the first metal guide rail (1122) and the second metal guide rail (1132).

4. The refrigerator with multi-zone independent temperature control function according to claim 2, characterized in that, A first sealing ring (1123) is provided between the drawer (117) of the second refrigerated area (112) and the opening end of the corresponding cavity, and a second sealing ring (1133) is provided between the drawer (117) of the third refrigerated area (113) and the opening end of the corresponding cavity. The first sealing ring (1123) and the second sealing ring (1133) are used to seal the gap between the drawer (117) and the opening end of the corresponding cavity respectively when the drawer (117) is closed.

5. The refrigerator with multi-zone independent temperature control function according to claim 2, characterized in that, The second refrigerated area (112) is provided with a first drawer cover (1124), and the third refrigerated area (113) is provided with a second drawer cover (1134). The first drawer cover (1124) and the second drawer cover (1134) are both located below the box cover (115) and respectively cover the corresponding drawer (117).

6. The refrigerator with multi-temperature zone independent temperature control function according to claim 5, characterized in that, An air supply cavity is formed between the first drawer cover (1124) and the box cover (115), and the air supply cavity is connected to the second refrigerated area (112).

7. The refrigerator with multi-temperature zone independent temperature control function according to claim 6, characterized in that, The first drawer cover (1124) is provided with a second air outlet (1125), and the second air duct (122) is connected to the air supply cavity through the second air outlet (1125).

8. The refrigerator with multi-zone independent temperature control function according to claim 5, characterized in that, The third refrigerated zone (113) is provided with a third air outlet (1135), and the third air outlet (1135) is located on the rear wall of the box base (114). The third air duct (123) is connected to the third refrigerated zone (113) through the third air outlet (1135).

9. The refrigerator with multi-zone independent temperature control function according to claim 1, characterized in that, The first air duct (121) has a first air outlet (1211) at its air outlet end, and the first air outlet (1211) is connected to the first cold storage area (111).

10. The refrigerator with multi-temperature zone independent temperature control function according to claim 1, characterized in that, The air duct assembly (12) further includes a fan (126), which is located upstream of the first air duct (121), the second air duct (122) and the third air duct (123), and is used to supply air to the first air duct (121), the second air duct (122) and the third air duct (123).

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