Refrigerating and freezing device

Abstract

The present invention provides a refrigerator-freezer. The refrigerator-freezer comprises: a first storage compartment partitioned into at least two storage spaces; a cooling compartment; an air duct system comprising at least two air supply vents, at least two first air return vents, and an on / off control device, wherein each air supply vent connects the cooling compartment and a storage space, and each first air return vent connects a storage space and the cooling compartment; the on / off control device controls airflow from the cooling compartment to flow to one or more of the at least two air supply vents, thereby controlling all or part of the airflow to flow to the corresponding storage space; and a gear generating device configured to generate at least two gear instruction groups, wherein the gear instruction group includes multiple gear instructions, each corresponding to one storage space; each gear instruction includes control information for setting the corresponding storage space at a target temperature, so that the refrigerator-freezer controls the on / off control device according to each gear instruction, thereby controlling the temperature within the corresponding storage space.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration equipment, in particular to a refrigeration and freezing device. Background Art

[0002] With socioeconomic development and improved living standards, refrigerators have become an indispensable household appliance. Existing refrigerators have uniform temperature control in their refrigerator compartments, with each compartment set at a uniform temperature of 0-5°C. However, the optimal storage temperature for each food varies. If the user sets the temperature to 0°C, the entire refrigerator compartment will remain at approximately 0°C. Storing food with an optimal temperature above 5°C at this temperature will significantly shorten its shelf life and accelerate spoilage. Summary of the Invention

[0003] In view of the above problems, an invention has been proposed to provide a refrigeration and freezing device that overcomes the above problems or at least partially solves the above problems. The device can realize independent partitioning of the refrigerator refrigeration compartment, and each layer of the partition can realize independent adjustment of multiple temperature levels such as 2, 5, 10 (low, medium, high), so that users can adjust the temperature of each layer of the refrigerator according to their needs and habits, and achieve the best storage environment area for different foods through balanced control of temperature and humidity, guiding users to correctly place the best storage space for food.

[0004] To this end, the present invention proposes a refrigeration and freezing device, comprising:

[0005] a first storage compartment, wherein at least one shelf is provided in the first storage compartment, so that the first storage compartment is divided into at least two storage spaces by the shelf;

[0006] a cooling chamber configured to accommodate an evaporator of the refrigerator-freezer;

[0007] an air duct system, the air duct system comprising at least two air supply vents, at least two first air return vents, and an on-off control device, each of the air supply vents communicating with the cooling chamber and one of the storage spaces, and each of the first air return vents communicating with one of the storage spaces and the cooling chamber; the on-off control device being configured to control airflow from the cooling chamber to flow to one or more of the at least two air supply vents, thereby controlling all or part of the airflow to flow to the corresponding storage space; and

[0008] The gear generating device is configured to generate at least two gear instruction groups; each of the gear instruction groups includes multiple gear instructions, and each of the gear instruction groups corresponds to controlling one of the storage spaces; each of the gear instructions includes control information for making the corresponding storage space at a target temperature or within a target temperature range, so that the refrigeration and freezing device controls the on-off control device according to each of the gear instructions, thereby controlling the temperature in the corresponding storage space.

[0009] Optionally, the gear generation device includes at least two display panels, which are arranged on the inner wall of each storage space, each of which is configured to receive a signal and generate a gear instruction of the gear instruction group; and each of which is further configured to display a type of recommended storage items in the corresponding storage space; or,

[0010] The gear generating device includes at least two adjustment buttons, and an indication icon corresponding to each gear instruction of each adjustment button; each indication icon at least includes information suggesting the type of items stored in the corresponding storage space.

[0011] Optionally, at least two of the storage spaces are arranged in sequence along the vertical direction; and the air duct system includes:

[0012] an air supply assembly, arranged at the rear of the first storage compartment, having at least two air supply ports; the on-off control device is arranged in the air supply assembly; and

[0013] The return air assembly is arranged on one lateral side of the air supply assembly and has at least two first return air ports.

[0014] Optionally, the on-off control device is a branch air supply device, comprising a shell, at least two air outlets arranged on the peripheral wall of the shell, and an adjustment member rotatably arranged inside the shell; the adjustment member has at least one shielding portion, configured to controllably shield at least two air outlets to adjust the air outlet area of each of the at least two air outlets; and each air outlet is connected to one of the storage spaces through the corresponding air supply port.

[0015] Optionally, at least one of the shelves also separates the first storage compartment into a drawer space; the drawer space is arranged on the lower side of the three storage spaces; the air duct system also has a second return air outlet arranged on the return air assembly, and the second return air outlet connects the drawer space and the cooling chamber.

[0016] Optionally, the number of the storage spaces is three, and the number of the first return air vents is three; the three first return air vents and the three second return air vents are arranged in sequence along the vertical direction.

[0017] Optionally, the at least two air outlets include a first air outlet, and a second air outlet and a third air outlet arranged on both sides of the first air outlet; the first air outlet faces upward;

[0018] The air supply ports connected to the uppermost storage space are first air supply ports, and there are four of them, which are respectively arranged on both sides of the upper part and both sides of the middle part of the storage space;

[0019] The air supply outlets connected to the middle storage space are second air supply outlets, and there are two of them, which are respectively arranged on both sides of the upper part of the storage space;

[0020] The air supply port connected to the lowermost storage space is a third air supply port, and there is only one of them, which is arranged on one side of the upper part of the storage space;

[0021] The air supply assembly is provided with:

[0022] a first air supply duct, the lower end of which is connected to the first air outlet, and the upper part of which is connected to the four first air supply outlets;

[0023] a second air supply duct and a crossing duct, wherein the second air supply duct is provided on one side of the first air supply duct, the lower end of the second air outlet is connected, and the upper end of the second air supply outlet is connected to one of the second air supply outlets and the crossing duct, the crossing duct spans the first air supply duct and is connected to the other second air supply outlet; and

[0024] The third air supply duct is arranged on the other side of the first air supply duct, with a lower end connected to the third air outlet and an upper end connected to the third air supply outlet.

[0025] Optionally, an area ratio between the topmost first return air outlet and the first return air outlet below it is 2 to 3;

[0026] an area ratio between the first return air outlet at the bottom and the first return air outlet above it of 1 / 2 to 7 / 10;

[0027] The area ratio between the first return air outlet and the second return air outlet at the bottom is 1 / 10 to 1 / 5.

[0028] Optionally, the refrigeration and freezing device further comprises:

[0029] a first door body, mounted on the first storage compartment and configured to open or close the first storage compartment;

[0030] At least one bottle holder is arranged on the rear side of the first door, and the lower part of each bottle holder is located in front of one of the shelves, and when the first door is closed, each bottle holder is in contact with the shelf.

[0031] Optionally, a return air duct is provided in the return air assembly, and each of the first return air ports is connected to the return air duct;

[0032] A sealing structure is provided between each of the shelves and the wall of the first storage compartment;

[0033] At least two temperature sensors are also provided in the air supply assembly to respectively detect the temperature in each of the storage spaces.

[0034] In the refrigeration and freezing device of the present invention, because it has an air duct system and a gear generating device, the refrigerator refrigeration compartment can be independently partitioned, and each layer of the partition can achieve multiple temperature independent adjustments such as 2°C, 5°C, 10°C (low, medium, high), so that users can adjust the temperature of each layer of the refrigerator according to their needs and habits, and achieve the best storage environment area for different foods through balanced control of temperature and humidity, guiding users to correctly place the best storage space for food.

[0035] Furthermore, in the refrigeration and freezing device of the present invention, the original breeze duct technology can achieve independent temperature control of each layer of the refrigeration compartment, rapid cooling, reduced temperature fluctuations on each layer, preservation and energy saving, and can also achieve independent adjustment of the temperature of each layer in three levels, so that food can be kept in the optimal temperature range, greatly improving the food's shelf life, making it more convenient for users to use, and more energy-efficient.

[0036] Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0038] Figure 1 is a schematic structural diagram of a refrigeration and freezing device according to one embodiment of the present invention;

[0039] Figure 2 yes Figure 1 A schematic partial structural diagram of the refrigeration and freezing device shown;

[0040] Figure 3 yes Figure 1 A schematic exploded view of a partial structure of the refrigerator-freezer shown;

[0041] Figure 4 yes Figure 1 A schematic partial structural diagram of the refrigeration and freezing device shown;

[0042] Figure 5 yes Figure 1 A schematic internal structure diagram of the refrigerator-freezer shown;

[0043] Figure 6 yes Figure 1 A schematic structural diagram of the air supply assembly in the refrigeration and freezing device shown;

[0044] Figure 7 yes Figure 6 A schematic structural diagram of the air supply assembly from another perspective;

[0045] Figure 8 yes Figure 1 The schematic structural diagram of the return air assembly in the refrigeration and freezing device shown. DETAILED DESCRIPTION

[0046] Figure 1 FIG. 1 is a schematic structural diagram of a refrigeration and freezing device according to an embodiment of the present invention. Figure 1 As shown, and reference Figures 2 to 8 The arrows in the figure indicate the direction of airflow. The embodiment of the present invention provides a refrigeration and freezing device. The refrigeration and freezing device includes a housing 20, which defines a storage compartment. The refrigeration and freezing device also has a door for opening and closing the storage compartment.

[0047] The storage compartments may include a first storage compartment, a second storage compartment, and a third storage compartment. The first storage compartment may be a refrigerator, the second storage compartment may be a freezer, and the third storage compartment may be a variable temperature compartment. Accordingly, the doors may include a first door 30, a second door, and a third door to respectively open or close the first, second, and third storage compartments. Furthermore, the temperature within the freezer compartment generally ranges from -22°C to -14°C. The variable temperature compartment can be adjusted to a temperature between -18°C and 8°C.

[0048] The refrigeration system is configured to provide cold air to the storage compartments. In some embodiments, the refrigeration system may be a refrigeration cycle system composed of a compressor, a condenser, a throttling device and an evaporator 27. The evaporator 27 is configured to directly or indirectly provide cold air to the storage compartments. Since the refrigeration system of the refrigerator-freezer itself is well known to those skilled in the art, it will not be described in detail here. A cooling chamber may be provided in the housing 20, specifically on the rear side of the third storage compartment. The cooling chamber is used to accommodate the evaporator 27. The number of cooling chambers and evaporators 27 may be one or more. When there is one evaporator 27, cold air is provided to all storage compartments; when there are multiple evaporators 27, each evaporator 27 may provide cold air to one storage compartment.

[0049] In some embodiments of the present invention, Figure 2As shown, at least one shelf 40 is provided in the first storage compartment, so that the first storage compartment is divided into at least two storage spaces 21 by the shelf 40. The refrigerator-freezer also includes an air duct system and a gear generating device 50. The air duct system has at least two air supply ports, at least two first air return ports 81, and an on-off control device. Each air supply port connects the cooling compartment and one storage space 21, and each first air return port 81 connects one storage space 21 and the cooling compartment. The on-off control device 60 is configured to control the airflow from the cooling compartment to flow to one or more of the at least two air supply ports, thereby controlling all or part of the airflow to flow to the corresponding storage space 21. Specifically, the on-off control device 60 can allow the airflow from the cooling compartment to flow to only one storage space 21, or it can allow the airflow to flow to two or more storage spaces 21 simultaneously, that is, it is used to adjust the air supply to each storage space 21.

[0050] The gear generating device 50 is configured to generate at least two gear instruction groups; each gear instruction group includes multiple gear instructions, and each gear instruction group corresponds to controlling a storage space 21; each gear instruction includes control information for making the corresponding storage space 21 at a target temperature or within a target temperature range, so that the refrigeration and freezing device controls the on-off control device 60 according to each gear instruction, thereby controlling the temperature in the corresponding storage space 21.

[0051] For example, in some embodiments, the gear generation device 50 includes at least two display panels, located on the inner wall of each storage space 21. Each display panel is configured to receive signals and generate a gear instruction for a gear instruction set; each display panel is also configured to display the type of items recommended for storage in the corresponding storage space 21. Each display panel can be located adjacent to the corresponding storage space 21. Furthermore, each display panel can be used to input information through sliding, clicking, or other methods. In some alternative embodiments of the present invention, the gear generation device 50 can be a touchscreen display of the refrigerator / freezer.

[0052] In other embodiments, the gear generation device 50 includes at least two adjustment buttons and an indicator icon corresponding to each gear position command of each adjustment button. Each indicator icon includes at least information suggesting the type of items stored in the corresponding storage space. Each adjustment button may be a mechanical key structure such as a knob. The indicator icon may be an icon located on the inside of the refrigerator body near the adjustment button and may be provided using methods such as engraving, silk screen printing, or hollowing. For example, the indicator icon may be a symbol representing an item suggesting the type of item stored in the corresponding storage space. Furthermore, each indicator icon includes at least a target temperature or target temperature range for the corresponding storage space. The gear generation device 50 may also include at least two indicator lights. Each gear position command of each adjustment button is associated with an indicator light, such that when the adjustment button indicates the corresponding gear position command, the corresponding indicator light turns on, thereby highlighting the corresponding indicator icon for easier viewing by the user. Alternatively, the indicator icon may be displayed on a display screen, thereby combining mechanical buttons with display screen display. Furthermore, the indicator icon may also be directly text, that is, the display screen may display all information associated with the corresponding gear instruction.

[0053] In this embodiment, the air duct system and gear generation device 50 enable independent partitioning of the refrigerator's refrigerated compartment, with each compartment independently adjustable to multiple temperature settings, such as 2°C, 5°C, and 10°C (low, medium, and high). This allows users to adjust the temperature of each refrigerator compartment according to their needs and preferences. By balancing temperature and humidity, the optimal storage environment for different foods is achieved, guiding users to correctly place food in the optimal storage space. Prior to this application, each refrigerator compartment had the same temperature, while different foods had different optimal storage temperatures and humidity levels. This led users to be hesitant to place some ready-to-eat foods and tropical fruits stored at low temperatures in the refrigerator. These foods were too cold to be eaten immediately, so users had to leave them outside. Tropical fruits, on the other hand, require storage between 8°C and 10°C for optimal shelf life, and therefore were not placed in the refrigerator. The food placed in the refrigerator was not in the optimal temperature range, quickly spoiling and causing significant waste. The embodiment of the present invention allows users to freely adjust the temperature of each refrigerator compartment according to their needs, ensuring that food is stored in the optimal storage space and guiding users to correctly place food in the optimal storage space. Each storage space 21 has its own independent air outlet and independent air return, and each storage space 21 can achieve multiple temperature changes and switch freely.

[0054] Furthermore, if each gear instruction group has a large number of gear instructions, for example, each one-degree Celsius change in the target temperature within the storage space can be used as a new gear. This can also be called stepless gear adjustment. For example, there can be 11 gears between 0°C and 10°C, allowing each storage space 21 to adjust its temperature anywhere between 0°C and 10°C. Of course, the range between 0°C and 10°C can also be limited to three gears: a 0°C ice zone, a 4°C gold zone, and a 10°C tropical fruit zone.

[0055] In some embodiments of the present invention, Figures 5 to 7 As shown, the on-off control device 60 is preferably a branch air supply device, which may include a shell, at least two air outlets provided on the peripheral wall of the shell, and an adjustment member rotatably provided inside the shell; the adjustment member has at least one shielding portion, configured to controllably shield the at least two air outlets to adjust the air outlet area of each of the at least two air outlets; and each air outlet is connected to a storage space 21 through a corresponding air supply port. In some specific embodiments, such as the branch air supply devices in CN104879994A, CN106196840A, etc. The rotation of the adjustment member can be driven by a motor and a gear transmission mechanism. For example, when there are three storage spaces 21 and three air outlets, 7 or 8 air supply modes can be achieved, such as fully open, fully closed, one air outlet open (3 types), and two of the air outlets open (3 types).

[0056] In some embodiments of the present invention, Figures 2 to 5 As shown, at least two storage spaces 21 are arranged vertically in sequence. The air duct system includes an air supply assembly 70 and an air return assembly 80. The air supply assembly 70 is located at the rear of the first storage compartment and has at least two air supply ports. The on / off control device 60 is located within the air supply assembly 70. The air return assembly 80 is located on one side of the air supply assembly 70 and has at least two first return ports 81.

[0057] Furthermore, at least one shelf 40 also separates the first storage compartment into a drawer space 22; the drawer space 22 is arranged on the lower side of the three storage spaces 21; the air duct system also has a second return air outlet 82 arranged on the return air assembly 80, and the second return air outlet 82 connects the drawer space 22 and the cooling chamber.

[0058] Each shelf 40 is preferably a shelf board, a partition board, or the like, and is sealed against the wall of the first storage compartment. At least one bottle holder 31 is also provided on the rear side of the first door 30, with the lower portion of each bottle holder 31 located in front of a shelf 40. When the first door 30 is closed, each bottle holder 31 is in contact with the shelf 40. Preferably, airflow is allowed between the lowermost storage space 21 and the bottle holder 31 in front of it to flow downward into the drawer space 22. The drawer space 22 can also be further divided into multiple sub-drawer spaces 22 by partition boards to prevent multiple drawers 23.

[0059] In some preferred embodiments of the present invention, there are three storage spaces 21 and three first air return vents 81. The three first air return vents 81 and second air return vents 82 are arranged in a vertical sequence. Each first air return vent 81 is located on one side of the lower portion of the corresponding storage space 21; the second air return vent 82 is located on one side of the lower portion of the drawer space 22. The at least two air outlets include a first air outlet and second and third air outlets located on either side of the first air outlet; the first air outlet faces upward.

[0060] The air supply ports communicating with the uppermost storage space 21 are first air supply ports, and there are four of them, located on both sides of the upper portion and both sides of the middle portion of the storage space 21. The air supply ports communicating with the middle storage space 21 are second air supply ports, and there are two of them, located on both sides of the upper portion of the storage space 21. The air supply port communicating with the lowermost storage space 21 is third air supply port, and there is one of them, located on one side of the upper portion of the storage space 21.

[0061] Furthermore, if Figure 6 and Figure 7 As shown, a first air supply duct 71, a second air supply duct 72, a crossing duct 73 and a third air supply duct 74 are provided in the air supply assembly 70. The lower end of the first air supply duct 71 is connected to the first air outlet, and the upper part is connected to four first air supply outlets. The second air supply duct 72 is provided on one side of the first air supply duct 71, with the lower end connected to the second air outlet, and the upper end connected to one second air supply outlet and the crossing duct 73. The crossing duct 73 crosses the first air supply duct 71 and is connected to another second air supply outlet. The third air supply duct 74 is provided on the other side of the first air supply duct 71, with the lower end connected to the third air outlet, and the upper end connected to the third air supply outlet. Preferably, the third air supply duct 74 and the third air supply outlet are both on the side of the first air supply duct 71 away from the return air assembly 80. As shown Figure 8 As shown, a return air duct is provided within the return air assembly 80, and each first return air port 81 is connected to the return air duct. The return air duct has a main return air port 83 that connects to the cooling chamber. The air supply assembly 70 also has an air inlet that can connect to the cooling chamber via an air inlet duct. A fan 28 can be provided at the outlet of the cooling chamber to promote airflow.

[0062] The area ratio between the topmost first return air vent 81 and the first return air vent 81 below it is 2 to 3; the area ratio between the bottommost first return air vent 81 and the first return air vent 81 above it is 1 / 2 to 7 / 10; and the area ratio between the bottommost first return air vent 81 and the second return air vent 82 is 1 / 10 to 1 / 5. For ease of control, the air supply assembly 70 is further equipped with at least two temperature sensors 51 to detect the temperature within each storage space 21. This allows the refrigerator / freezer to be controlled based on the temperature detected by the temperature sensors 51. Each temperature sensor 51 is capable of sensing temperature changes in the corresponding storage space 21.

[0063] In the embodiment of the present invention, Figure 4 and Figure 5 As shown, the cold air from the cooling chamber is transferred to the air supply assembly 70. The air supply assembly 70 is equipped with an air volume distributor, i.e., a branch air supply device. The distributor realizes independent air supply to each layer of the air path or any combination of air supply. The air reaches each layer, returns through the independent return air vents of each layer, and then converges into the return air duct assembly to return to the cooling chamber. A seal is formed between the shelf 40 and the inner liner of the cabinet 20 to prevent the cold air from sinking and affecting the temperature fluctuation and control of the next layer. The display panel is equipped with 2°C, 5°C, and 10°C selection buttons (or low, medium, and high) for gear selection. At the same time, information about the storage type will be displayed to remind the user which items are placed in which area. When the first layer storage space 21 (the topmost storage space 21) needs air supply, the air exits through the first air supply vent, passes through the shelf 40, reaches the bottle holder 31 and the first door 30, and due to the configuration of the first return air vent 81, the air is returned through the first layer return air vent, completing a refrigeration cycle. When the temperature of the temperature sensor 51 corresponding to each layer of storage space 21 reaches the set temperature, the corresponding air outlet on the branch air supply device is closed and stops supplying air. The temperature between the shelf 40 and the bottle holder 31 is the same. The air circulation of the second layer of storage space 21 (the middle storage space 21) is the same as that of the first layer of storage space 21. Part of the wind from the third layer of storage space 21 (the lowermost storage space 21) passes through the shelf 40 to reach the bottle holder 31 and the first door body 30, and the other part will go down to the drawer area to transport cold air. The cold air ratio of each layer is controlled by the different sizes of the return air outlet to achieve a balance of the set temperature. The temperature sensor 51 detects that the temperature of the storage space 21 is high and air needs to be supplied, and the distributor will supply air to that layer. An independent return air vent is set in each storage space 21 and drawer space 22. The size of each return air vent has undergone rigorous calculation and simulation analysis. Considering factors such as heat conduction and cooling capacity, the area ratio of the four return air vents from top to bottom, namely the three first return air vents 81 and the second return air vents 82, is preferably 6:2.5:1.5:10.

[0064] The refrigeration and freezing device of the embodiment of the present invention can achieve multi-layer zoned temperature control in the refrigerated compartment; each layer can achieve three levels of temperature change; users can freely select the temperature range according to their needs; the size ratio of the return air vent is strictly calculated to achieve temperature balance. The return air vent is set in a structural manner; the return air vent, shelf 40, and bottle holder 31 cooperate with each other to achieve an air circulation method with adjustable temperature and humidity in the refrigeration and freezing device. Each display control panel can be set on the side wall of each storage space 21 and located near the first door body 30 for easy operation. Users can adjust it at will according to their own habits, which is convenient for users. It can also guide users to correctly place food for storage, reducing waste. Food that was previously not dared to be put in the refrigerator can now be put in the refrigerator to extend its shelf life. It can store food in an optimal temperature and humidity environment, greatly improving freshness. Air is only supplied to each layer when it is needed, preventing food from overcooling and saving energy.

[0065] At this point, those skilled in the art will recognize that, although a number of exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications consistent with the principles of the present invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims

1. A refrigeration and freezing device, characterized in that: include: a first storage compartment, wherein at least one shelf is provided in the first storage compartment, so that the first storage compartment is divided into at least two storage spaces by the shelf; a cooling chamber configured to accommodate an evaporator of the refrigerator-freezer; an air duct system, the air duct system comprising at least two air supply vents, at least two first air return vents, and an on-off control device, each of the air supply vents communicating with the cooling chamber and one of the storage spaces, and each of the first air return vents communicating with one of the storage spaces and the cooling chamber; the on-off control device being configured to control airflow from the cooling chamber to flow to one or more of the at least two air supply vents, thereby controlling all or part of the airflow to flow to the corresponding storage space; and a gear generating device configured to generate at least two gear instruction groups; each gear instruction group includes a plurality of gear instructions, and each gear instruction group controls a corresponding storage space; each gear instruction includes control information for causing the corresponding storage space to be at a target temperature or within a target temperature range, so that the refrigerator-freezer controls the on-off control device according to each gear instruction, thereby controlling the temperature in the corresponding storage space; At least two of the storage spaces are arranged in sequence along the vertical direction; the air duct system includes: An air supply assembly is provided at the rear of the first storage compartment and has at least two air supply ports; the on-off control device is provided in the air supply assembly; The on-off control device is a branch air supply device including at least two air outlets; The at least two air outlets include a first air outlet, and a second air outlet and a third air outlet arranged on both sides of the first air outlet; the first air outlet faces upward; The air supply outlets connected to the uppermost storage space are first air supply outlets, which are respectively arranged on both sides of the upper part and both sides of the middle part of the storage space; The air supply outlets connected to the storage space in the middle are second air supply outlets, which are respectively arranged on both sides of the upper part of the storage space; The air supply port connected to the lowermost storage space is a third air supply port, which is provided on one side of the upper portion of the storage space; The air supply assembly is provided with: a first air supply duct, the lower end of which is connected to the first air outlet, and the upper part of which is connected to the first air supply outlet; a second air supply duct and a crossing duct, wherein the second air supply duct is provided on one side of the first air supply duct, the lower end of the second air outlet is connected, and the upper end of the second air supply outlet is connected to one of the second air supply outlets and the crossing duct, the crossing duct spans the first air supply duct and is connected to the other second air supply outlet; and The third air supply duct is arranged on the other side of the first air supply duct, with a lower end connected to the third air outlet and an upper end connected to the third air supply outlet.

2. The refrigerator-freezer according to claim 1, wherein: The gear generating device includes at least two display panels, which are arranged on the inner wall of each storage space, each of which is configured to receive a signal and generate a gear instruction of the gear instruction group; and each of which is further configured to display a type of recommended storage items in the corresponding storage space; or, The gear generating device includes at least two adjustment buttons, and an indication icon corresponding to each gear instruction of each adjustment button; each indication icon at least includes information suggesting the type of items stored in the corresponding storage space.

3. The refrigerator-freezer according to claim 2, wherein: The air duct system further includes: The return air assembly is arranged on one lateral side of the air supply assembly and has at least two first return air ports.

4. The refrigerator-freezer according to claim 3, wherein: The branch air supply device also includes a shell and an adjusting member rotatably arranged inside the shell; at least two air outlets are arranged on the peripheral wall of the shell; the adjusting member has at least one shielding portion, which is configured to controllably shield the at least two air outlets to adjust the air outlet area of each of the at least two air outlets; and each air outlet is connected to one of the storage spaces through the corresponding air supply port.

5. The refrigerator-freezer according to claim 4, characterized in that: At least one of the shelves also separates the first storage compartment into a drawer space; the drawer space is arranged on the lower side of the three storage spaces; the air duct system also has a second return air outlet arranged on the return air assembly, and the second return air outlet connects the drawer space and the cooling chamber.

6. The refrigerator-freezer according to claim 5, characterized in that: There are three storage spaces and three first return air vents; each first return air vent is arranged on the lower side of the corresponding storage space; and the second return air vent is arranged on the lower side of the drawer space.

7. The refrigerator-freezer according to claim 6, characterized in that: There are four first air supply outlets, two second air supply outlets, and one third air supply outlet.

8. The refrigerator-freezer according to claim 6, wherein: an area ratio between the uppermost first return air vent and the lower first return air vent of the same is 2 to 3; an area ratio between the first return air outlet at the bottom and the first return air outlet above it of 1 / 2 to 7 / 10; The area ratio between the first return air outlet and the second return air outlet at the bottom is 1 / 10 to 1 / 5.

9. The refrigerator-freezer according to claim 5, characterized in that: Also includes: a first door body, mounted on the first storage compartment and configured to open or close the first storage compartment; At least one bottle holder is arranged on the rear side of the first door, and the lower part of each bottle holder is located in front of one of the shelves, and when the first door is closed, each bottle holder is in contact with the shelf.

10. The refrigerator-freezer according to claim 3, wherein: A return air duct is provided in the return air assembly, and each of the first return air ports is connected to the return air duct; A sealing structure is provided between each of the shelves and the wall of the first storage compartment; At least two temperature sensors are also provided in the air supply assembly to respectively detect the temperature in each of the storage spaces.

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