Refrigeration cabinet air outlet system and control method thereof

Abstract

The present invention belongs to the technical field of refrigeration equipment, and in particular to a refrigeration cabinet air outlet system and a control method thereof. Aiming at the problem of high power consumption of traditional air-cooled refrigeration cabinets, the following scheme is proposed, including a bottom box, a refrigeration system is installed inside the bottom box, and the refrigeration system includes an evaporator, a fan motor, a fan, a condenser, a compressor and a fan regulator, an air duct mechanism is installed inside the bottom box and the back plate, and the air duct mechanism includes a main air duct, a back plate is welded on the upper surface of the bottom box near the rear end, and side plates are fixed by bolts on the upper surface of the bottom box near both sides, and the top of the back plate and the side plate are fixed by bolts to the same cabinet top. The present invention sets a plurality of refrigeration sub-spaces and corresponding solenoid valves one, so that each refrigeration sub-space will not interfere with each other, and any solenoid valve one can be selected to be opened or closed separately, which is convenient for saving cold and improving the utilization rate of cold.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration equipment, and in particular to an air outlet system of a refrigeration cabinet and a control method thereof. Background Art

[0002] In modern daily life, refrigerators have become an indispensable item for people; first of all, refrigerators can help us keep food fresh. We all know that food is easy to spoil at high temperatures, and refrigerators can provide a low-temperature environment, effectively extending the shelf life of food and making our diet safer and healthier; in addition, refrigerators also have the function of dehumidification. In a humid environment, the low temperature of the refrigerator can absorb moisture in the air, reduce humidity, and make us feel more comfortable; at the same time, refrigerators can also increase the air flow rate and promote indoor ventilation, which is also beneficial to our health; air-cooled refrigerators have forced circulation of cold air, fast cooling speed, and good temperature balance, so more and more users choose air-cooled refrigerators.

[0003] Compared with direct-cooling refrigeration cabinets, air-cooled refrigeration cabinets have an additional set of air duct circulation components. In order to ensure the cooling effect, the fan needs to continuously blow air through the evaporator to produce heat exchange, reduce the air temperature, and then send it into the box to maintain a low temperature. Therefore, air-cooled refrigeration cabinets have higher power consumption, which increases the economic burden on users. Summary of the invention

[0004] Based on the technical problem of high power consumption of traditional air-cooled refrigeration cabinets, the present invention proposes an air outlet system for a refrigeration cabinet and a control method thereof.

[0005] A refrigeration cabinet air outlet system proposed by the present invention comprises a bottom box, wherein a refrigeration system is installed inside the bottom box, and the refrigeration system comprises an evaporator, a fan motor, a fan, a condenser, a compressor and a fan regulator, an air duct mechanism is installed inside the bottom box and a back plate, and the air duct mechanism comprises a main air duct, a back plate is welded to the upper surface of the bottom box near the rear end, and side plates are fixed to the upper surface of the bottom box near both sides by bolts, the top ends of the back plate and the side plates are fixed to the same cabinet top by bolts, the opposite sides of the two side plates are fixed to the same partition plate by bolts near the middle, and partition plates are installed at the middle of the upper end and the middle of the lower end of the partition plate, and the plurality of partition plates divide the refrigerated main space into a plurality of equally divided refrigerated sub-spaces, the inner walls of the back plates of the refrigerated sub-spaces are installed with independent cold air boxes, and the air inlets of the cold air boxes are installed with solenoid valves, and the inner walls of the back plates of the refrigerated sub-spaces are installed with independent air return ports.

[0006] Preferably, the air duct mechanism includes a main air duct, and the main air duct is connected to the evaporator. A plurality of sub-air ducts are connected to one end of the main air duct away from the evaporator, and the sub-air ducts correspond to the refrigerated sub-spaces. The sub-air ducts are connected to the air inlet of the cold air box, and a return air fan with controllable speed is installed inside the return air port.

[0007] Preferably, a louvered air outlet is clamped at the front end of the cold air box.

[0008] Preferably, an air filter is installed at one end of the interior of the cold air box close to the solenoid valve.

[0009] Preferably, a solenoid valve 2 is installed on the inner wall of the cold air box away from the solenoid valve 1, and the solenoid valve 2 is connected to a ventilation pipe, the ventilation pipe passes through the cold air box, and a connecting pipe is connected to the circumferential outer wall of the ventilation pipe away from the cold air box, and a changing hose is sleeved at the opening of the connecting pipe.

[0010] Preferably, a cold air auxiliary pipe is inserted into the end of the changing hose away from the connecting pipe, and the circumferential outer wall of the cold air auxiliary pipe is provided with evenly distributed air outlet holes, a rotating shaft is inserted into the circumferential outer wall of the cold air auxiliary pipe close to the end of the changing hose, and a connecting block is welded to the end of the rotating shaft away from the cold air box, and the connecting block is connected to the vertical partition.

[0011] Preferably, the front end of the refrigerated subspace is slidably connected to a sliding door, and a handle is fixed to the front end of the sliding door on the side close to the side panel by bolts, and a distance sensor is installed on the side of the side panel close to the sliding door.

[0012] Preferably, the partitions in the vertical state are provided with connecting holes near the middle, and the inner wall of the connecting holes is clamped with a ventilation rotating plate.

[0013] Preferably, a height sensor is installed on the inner wall of the back panel of the refrigerated sub-space near the cold air box, and a temperature sensor, an air quality sensor and a humidity sensor are installed on the inner wall of the back panel of the refrigerated sub-space near the middle, and a memory and a processor are installed inside the bottom box, and a touch screen is installed on the outer side of the side panel near the middle.

[0014] A method for controlling air outlet of a refrigeration cabinet comprises the following steps:

[0015] S1: When the refrigeration cabinet is working, the fan motor drives the fan to force the air to circulate. The circulating airflow continuously exchanges heat with the evaporator and then is transported to the cold air box of each sub-refrigerated room through the main air duct and sub-air duct of the air duct mechanism. After the air filter element in the cold air box filters out odor, the louvered air outlet evenly transports the cold air to the refrigerated items in the sub-refrigerated room. The touch screen displays the temperature, air quality and air humidity information of each sub-refrigerated room, and the touch screen has the highest authority of the air outlet system;

[0016] S2: When the sub-refrigerator is idle, in order to avoid extra cooling consumption, the solenoid valve 1 of the corresponding sub-refrigerator is closed through the touch screen so that cold air does not flow into the corresponding sub-refrigerator. After receiving the command, the processor closes the solenoid valve 1 and controls the fan regulator to reduce the fan speed, thereby reducing the cooling capacity delivered and reducing energy consumption.

[0017] S3: When the sliding door is opened, the distance sensor on the corresponding side panel senses the sliding distance of the sliding door. In order to prevent the escape of cold air, the processor linearly closes the solenoid valve 1 according to the sliding distance of the sliding door. The larger the opening range of the sliding door, the deeper the closing degree of the solenoid valve 1.

[0018] S4: When the items in the sub-refrigerator are piled too high, the height sensor is triggered. In order to prevent the piled-up items from affecting the uniform cooling of the cooling box, the processor controls the second solenoid valve to open, so that the cooling energy enters the cooling auxiliary pipe and is evenly dispersed from the air outlet of the cooling auxiliary pipe, further ensuring the air outlet effect;

[0019] S5: When the temperature of the sub-refrigerator needs to be adjusted, the touch screen is used to determine the accurate temperature. After receiving the command, the processor adaptively adjusts the solenoid valve 1 according to the information of the temperature sensor to adjust the input amount of the cooling capacity to achieve the effect of controlling the temperature;

[0020] S6: When the air quality sensor detects that the air quality is deteriorating, the processor sends a warning to the touch screen. The user can choose to replace the air filter according to the warning content to improve the air purification effect;

[0021] S7: When the humidity sensor of the sub-refrigerated space senses that the humidity deviates from the normal range, the controller controls the return air fan in the return air port of the corresponding sub-refrigerated space; when the humidity is too high, the return air fan is accelerated to increase the wind speed flow in the sub-refrigerated space, take away the water vapor and reduce the humidity; when the humidity is too low, the return air fan is decelerated to slow down the wind speed flow in the sub-refrigerated space, retain the water vapor and increase the humidity.

[0022] The beneficial effects of the present invention are:

[0023] 1. By setting up multiple refrigerated sub-spaces and corresponding solenoid valves, the refrigerated sub-spaces will not interfere with each other, and any solenoid valve can be opened or closed separately, which is convenient for saving cold energy and improving the utilization rate of cold energy.

[0024] 2. By setting up the main air duct, the cold energy of the main air duct can be evenly transported to the sub-air ducts and then enter each refrigerated sub-space, and the return air fan can individually control the return air rate of each sub-refrigerated room and regulate the flow speed of cold energy in the sub-refrigerated room.

[0025] 3. By setting an air filter at the air outlet to filter the output cold air, the best filtering effect can be achieved, effectively preventing the cold air from being contaminated with odor in the main air duct and sub-air duct.

[0026] 4. By setting up a cold air auxiliary pipe, the angle and direction of cold air release can be increased on the basis of the cold air box, so that the cold air can enter the cold storage room more evenly and improve the refrigeration efficiency.

[0027] 5. By setting up a ventilation rotating plate, if the refrigeration effect of one sub-refrigerator deteriorates, or the cold air box fails, resulting in the inability to supply cold air in time, the ventilation rotating plate can be rotated to make the two adjacent sub-refrigerators interconnected, so as to share cold air and avoid the deterioration of items. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the structure of one side of an air outlet system for a refrigeration cabinet proposed by the present invention;

[0029] Figure 2 This is a front structural schematic diagram of an air outlet system for a refrigeration cabinet proposed by the present invention;

[0030] Figure 3 A schematic diagram of the structure of an air outlet mechanism of an air outlet system for a refrigeration cabinet proposed by the present invention;

[0031] Figure 4 A cross-sectional view of the air outlet mechanism structure of an air outlet system of a refrigeration cabinet proposed by the present invention;

[0032] Figure 5 A schematic diagram of a cold air auxiliary pipe mechanism of a refrigeration cabinet air outlet system proposed by the present invention;

[0033] Figure 6 This is a flow chart of the distance sensor function of a refrigeration cabinet air outlet control method proposed by the present invention;

[0034] Figure 7 A working flow diagram of a temperature sensor, a humidity sensor, and an air quality sensor for a refrigeration cabinet air outlet control method proposed by the present invention;

[0035] Figure 8 This is a flow chart of the action of a height sensor in a refrigeration cabinet air outlet control method proposed by the present invention.

[0036] In the figure: 1. cabinet top; 2. side panel; 3. back panel; 4. touch screen; 5. bottom box; 6. ventilation turn plate; 7. handle; 8. partition; 9. sliding door; 10. air conditioning auxiliary pipe; 11. distance sensor; 12. air conditioning box; 13. height sensor; 14. temperature sensor; 15. return air port; 16. air quality sensor; 17. humidity sensor; 18. louver air port; 19. connecting pipe; 20. change direction hose; 21. air filter element; 22. solenoid valve 1; 23. connecting block; 24. rotating shaft; 25. ventilation pipe; 26. solenoid valve 2; 27. air outlet. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0038] Embodiment 1:

[0039] Reference Figure 1-8 A refrigeration cabinet air outlet system includes a bottom box 5, a refrigeration system is installed inside the bottom box 5, and the refrigeration system includes an evaporator, a fan motor, a fan, a condenser, a compressor and a fan regulator, an air duct mechanism is installed inside the bottom box 5 and the back plate 3, and the air duct mechanism includes a main air duct, the back plate 3 is welded to the upper surface of the bottom box 5 near the rear end, and the upper surface of the bottom box 5 near both sides are fixed with side plates 2 by bolts, the top of the back plate 3 and the side plate 2 are fixed with the same cabinet top 1 by bolts, and the opposite sides of the two side plates 2 are fixed with the same partition plate 8 by bolts near the middle , and partitions 8 are installed in the middle of the upper end and the middle of the lower end of the partition 8. The multiple partitions 8 divide the main refrigerated space into a number of equally divided refrigerated sub-spaces. The inner walls of the back plates 3 of the refrigerated sub-spaces are installed with independent cold air boxes 12, and the air inlets of the cold air boxes 12 are installed with solenoid valves 22. The inner walls of the back plates 3 of the refrigerated sub-spaces are installed with independent air return ports 15. By setting multiple refrigerated sub-spaces and corresponding solenoid valves 22, the refrigerated sub-spaces will not interfere with each other, and any solenoid valve 22 can be opened or closed separately, which is convenient for saving cold energy and improving the utilization rate of cold energy.

[0040] In the present invention, the air duct mechanism includes a main air duct, and the main air duct is connected to the evaporator, a plurality of sub-air ducts are connected to one end of the main air duct away from the evaporator, and the sub-air ducts correspond to the refrigerated sub-spaces, the sub-air ducts are connected to the air inlet of the cold air box 12, and a return air fan with controllable speed is installed inside the return air port 15; by setting the main air duct, the cold energy of the main air duct can be evenly transported to the sub-air ducts and then enter each refrigerated sub-space, and the return air fan can individually control the return air rate of each sub-refrigerated room.

[0041] Reference Figure 3The front end of the cold air box 12 is clamped with a louver air outlet 18, through which the louver air outlet 18 can deliver cold energy at multiple angles, so that the cold energy can act more evenly on the refrigerated space.

[0042] Reference Figure 3 An air filter 21 is installed at one end of the interior of the air conditioning box 12 near the solenoid valve 22; by setting the air filter 21 at the air outlet, the output cold air is filtered to achieve the best filtering effect, and effectively avoid the cold air from being contaminated with odor in the main air duct and the sub-air duct.

[0043] Reference Figure 4 and Figure 5 A solenoid valve 26 is installed on the inner wall of the cold air box 12 on the side away from the solenoid valve 1 22, and the solenoid valve 26 is connected to a ventilation pipe 25, the ventilation pipe 25 passes through the cold air box 12, and the circumferential outer wall of the ventilation pipe 25 at one end away from the cold air box 12 is connected to a connecting pipe 19, and a changing hose 20 is sleeved at the opening of the connecting pipe 19, and the end of the changing hose 20 away from the connecting pipe 19 is plugged with a cold air auxiliary pipe 10, and the circumferential outer wall of the cold air auxiliary pipe 10 is provided with evenly distributed air outlet holes 27, and a rotating shaft 24 is plugged with one end of the circumferential outer wall of the cold air auxiliary pipe 10 close to the changing hose 20, and a connecting block 23 is welded on the end of the rotating shaft 24 away from the cold air box 12, and the connecting block 23 is connected to the vertical partition 8; by arranging the cold air auxiliary pipe 10, the angle and direction of cold air release can be increased on the basis of the cold air box 12, so that the cold air can enter the cold storage room more evenly, thereby improving the refrigeration efficiency.

[0044] Reference Figure 2 The front end of the refrigerated subspace is slidably connected with a sliding door 9, and a handle 7 is fixed to the front end of the sliding door 9 close to the side panel 2 by bolts, and a distance sensor 11 is installed on the side of the side panel 2 close to the sliding door 9; by setting the distance sensor 11, the state of the sliding door 9 can be sensed, and the solenoid valve 22 can be adjusted in time to reduce or increase the delivery of cold air and avoid wasting cold air.

[0045] Reference Figure 1 The vertical partitions 8 are all provided with connecting holes near the middle, and the inner wall of the connecting hole is clamped with a ventilation rotating plate 6; by setting the ventilation rotating plate 6, if the refrigeration effect of one sub-refrigerating chamber deteriorates, or the cold air box 12 fails, resulting in the inability to supply cold air in time, the ventilation rotating plate 6 can be rotated to make the two adjacent sub-refrigerating chambers communicate with each other, so as to share cold air and reduce losses.

[0046] Reference Figure 1 A touch screen 4 is installed near the middle of the outer side of a side panel 2; by setting the touch screen 4, the status of each sub-refrigerating chamber can be observed and adjusted in time, so that each sub-refrigerating chamber can work at the best effect, avoid waste of cooling capacity, and reduce the power consumption of the refrigerating cabinet.

[0047] Embodiment 2:

[0048] A refrigeration cabinet air outlet system and a control method thereof. This embodiment makes the following improvements on the basis of embodiment 1: Figure 2 As shown,

[0049] A height sensor 13 is installed on the inner wall of the back plate 3 of the refrigerated sub-space near the cold air box 12, and a temperature sensor 14, an air quality sensor 16 and a humidity sensor 17 are installed near the middle of the inner wall of the back plate 3 of the refrigerated sub-space, and a memory and a processor are installed inside the bottom box 5; through each sensor, information of each sub-refrigerated room can be collected and saved in the storage device, providing data support for reducing the power consumption of the refrigeration cabinet.

[0050] Reference Figure 6 , Figure 7 and Figure 8 , a refrigeration cabinet air outlet control method, comprising the following steps:

[0051] S1: When the refrigeration cabinet is working, the fan motor drives the fan to force the air to circulate, and the circulating airflow continuously exchanges heat with the evaporator, and then is transported to the cold air box 12 of each sub-refrigerating room through the main air duct and the sub-air duct of the air duct mechanism. After the air filter element 21 in the cold air box 12 filters the odor, the louver air outlet 18 evenly transports the cold air to act on the refrigerated objects in the sub-refrigerating room. The touch screen 4 displays the temperature, air quality and air humidity information of each sub-refrigerating room, and the touch screen 4 has the highest authority of the air outlet system;

[0052] S2: When the sub-refrigerating chamber is idle, in order to avoid extra cooling consumption, the solenoid valve 22 of the corresponding sub-refrigerating chamber is closed through the touch screen 4, so that the cold air does not flow into the corresponding sub-refrigerating chamber. After receiving the command, the processor closes the solenoid valve 22 and controls the fan regulator to reduce the fan speed, thereby reducing the cooling capacity delivered and reducing energy consumption.

[0053] S3: When the sliding door 9 is opened, the distance sensor 11 on the corresponding side plate 2 senses the sliding distance of the sliding door 9. In order to prevent the escape of cold, the processor linearly closes the solenoid valve 1 22 according to the sliding distance of the sliding door 9. The larger the opening range of the sliding door 9 is, the deeper the closing degree of the solenoid valve 1 22 is.

[0054] S4: When the objects in the sub-refrigerating chamber are piled too high, the height sensor 13 is triggered. In order to prevent the objects piled too high from affecting the uniform cooling of the cooling box 12, the processor controls the solenoid valve 26 to open, so that the cooling energy enters the cooling sub-pipe 10 and is evenly dispersed from the air outlet 27 of the cooling sub-pipe 10, further ensuring the air outlet effect.

[0055] S5: When the temperature of the sub-refrigerating chamber needs to be adjusted, the touch screen 4 is used to determine the accurate temperature. After receiving the command, the processor adaptively adjusts the solenoid valve 22 according to the information of the temperature sensor 14 to adjust the input amount of the cooling capacity to achieve the effect of controlling the temperature;

[0056] S6: When the air quality sensor 16 detects that the air quality is deteriorating, the processor sends a warning to the touch screen 4, and the user can choose to replace the air filter 21 according to the warning content to improve the air purification effect;

[0057] S7: When the humidity sensor 17 of the sub-refrigerated space senses that the humidity deviates from the normal range, the controller controls the return air fan in the return air port 15 in the corresponding sub-refrigerated space; when the humidity is too high, the return air fan is accelerated to increase the wind speed flow in the sub-refrigerated space, take away the water vapor and reduce the humidity. When the humidity is too low, the return air fan is decelerated to slow down the wind speed flow in the sub-refrigerated space, retain the water vapor and increase the humidity.

[0058] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A refrigeration cabinet air outlet system, comprising a bottom box (5), a refrigeration system installed inside the bottom box (5), and the refrigeration system includes an evaporator, a fan motor, a fan, a condenser, a compressor and a fan regulator, an air duct mechanism is installed inside the bottom box (5) and a back plate (3), and the air duct mechanism includes a main air duct, the back plate (3) is welded to the upper surface of the bottom box (5) near the rear end, and side plates (2) are fixed to the upper surface of the bottom box (5) near both sides by bolts, and the top ends of the back plate (3) and the side plates (2) are fixed to the same cabinet top (1) by bolts, characterized in that: The same partition (8) is fixed by bolts near the middle of the opposite sides of the two side panels (2), and the middle of the upper end and the middle of the lower end of the partition (8) are both installed with partitions (8). The plurality of partitions (8) divide the main refrigerated space into a plurality of equally divided refrigerated sub-spaces. The inner walls of the back panels (3) of the refrigerated sub-spaces are all installed with independent cold air boxes (12), and the air inlets of the cold air boxes (12) are installed with solenoid valves (22). The inner walls of the back panels (3) of the refrigerated sub-spaces are all installed with independent air return ports (15); The air duct mechanism comprises a main air duct, and the main air duct is connected to the evaporator. The end of the main air duct away from the evaporator is connected to a plurality of sub-air ducts, and the sub-air ducts correspond to the refrigerated sub-spaces. The sub-air ducts are connected to the air inlet of the cold air box (12). A return air fan with a controllable speed is installed inside the return air port (15). A louver air port (18) is clamped at the front end of the cold air box (12). An air filter element (21) is installed inside the cold air box (12) at one end close to the solenoid valve (22).

2. The refrigeration cabinet air outlet system according to claim 1, characterized in that: A second solenoid valve (26) is installed on the inner wall of the cold air box (12) away from the first solenoid valve (22), and the second solenoid valve (26) is connected to a ventilation pipe (25). The ventilation pipe (25) passes through the cold air box (12). A connecting pipe (19) is connected to the circumferential outer wall of one end of the ventilation pipe (25) away from the cold air box (12), and a change-of-direction hose (20) is sleeved on the opening of the connecting pipe (19).

3. The refrigeration cabinet air outlet system according to claim 2, characterized in that: The end of the reversing hose (20) away from the connecting pipe (19) is plugged with a cold air auxiliary pipe (10), and the circumferential outer wall of the cold air auxiliary pipe (10) is provided with evenly distributed air outlet holes (27); the end of the circumferential outer wall of the cold air auxiliary pipe (10) close to the reversing hose (20) is plugged with a rotating shaft (24), and the end of the rotating shaft (24) away from the cold air box (12) is welded with a connecting block (23), and the connecting block (23) is connected to the vertical partition (8).

4. The refrigeration cabinet air outlet system according to claim 1, characterized in that: The front end of the refrigerated subspace is slidably connected to a sliding door (9), and a handle (7) is fixed to the front end of the sliding door (9) on a side close to the side plate (2) via bolts, and a distance sensor (11) is installed on a side of the side plate (2) close to the sliding door (9).

5. The refrigeration cabinet air outlet system according to claim 1, characterized in that: The partition plates (8) in the vertical state are provided with connecting holes near the middle, and the inner walls of the connecting holes are clamped with ventilation rotating plates (6).

6. The refrigeration cabinet air outlet system according to claim 4, characterized in that: A height sensor (13) is installed on the inner wall of the back plate (3) of the refrigerated sub-space near the cold air box (12), and a temperature sensor (14), an air quality sensor (16) and a humidity sensor (17) are installed on the inner wall of the back plate (3) of the refrigerated sub-space near the middle, and a memory and a processor are installed inside the bottom box (5), and a touch screen (4) is installed on the outer side of one of the side plates (2) near the middle, and the touch screen (4) displays information such as the temperature of each sub-refrigerated space.

7. A method for controlling air outlet of a refrigerating cabinet, comprising an air outlet system of a refrigerating cabinet as claimed in claim 6, characterized in that: Follow these steps: S1: When the refrigeration cabinet is working, the fan motor drives the fan to force air to circulate. The circulating airflow continuously exchanges heat with the evaporator and is then transported to the cold air box (12) of each sub-refrigerating chamber through the main air duct and the sub-air duct of the air duct mechanism. After the air filter element (21) in the cold air box (12) filters out odor, the louvered air outlet (18) evenly transports the cold air to the refrigerated items in the sub-refrigerating chamber. The touch screen (4) displays the temperature, air quality and air humidity information of each sub-refrigerating chamber, and the touch screen (4) has the highest authority of the air outlet system. S2: When the sub-refrigerating chamber is idle, in order to avoid extra cooling consumption, the solenoid valve 1 (22) of the corresponding sub-refrigerating chamber is closed through the touch screen (4) so ​​that cold air no longer flows into the corresponding sub-refrigerating chamber. After receiving the command, the processor closes the solenoid valve 1 (22) and controls the fan regulator to reduce the fan speed, thereby reducing the cooling capacity delivered and reducing energy consumption. S3: When the sliding door (9) is opened, the distance sensor (11) on the corresponding side plate (2) senses the sliding distance of the sliding door (9). In order to prevent the escape of cold, the processor linearly closes the solenoid valve 1 (22) according to the sliding distance of the sliding door (9). The larger the opening range of the sliding door (9), the deeper the closing degree of the solenoid valve 1 (22); S4: When the objects in the sub-refrigerating chamber are piled too high, the height sensor (13) is triggered. In order to prevent the objects piled too high from affecting the uniform cooling of the cooling box (12), the processor controls the second solenoid valve (26) to open, so that the cooling energy enters the cooling auxiliary pipe (10) and is evenly dispersed from the air outlet (27) of the cooling auxiliary pipe (10), thereby further ensuring the air outlet effect. S5: When the temperature of the sub-refrigerating chamber needs to be adjusted, the touch screen (4) is used to determine the accurate temperature. After receiving the command, the processor adaptively adjusts the solenoid valve 1 (22) according to the information of the temperature sensor (14) to adjust the input amount of the cooling capacity to achieve the effect of controlling the temperature; S6: When the air quality sensor (16) detects that the air quality has deteriorated, the processor sends a warning message to the touch screen (4), and the user can choose to replace the air filter (21) according to the warning message to improve the air purification effect; S7: When the humidity sensor (17) of the sub-refrigerated space senses that the humidity deviates from the normal range, the controller controls the return air fan in the return air port (15) of the corresponding sub-refrigerated space; when the humidity is too high, the return air fan is accelerated to increase the wind speed flow in the sub-refrigerated space, remove the water vapor and reduce the humidity; when the humidity is too low, the return air fan is decelerated to slow down the wind speed flow in the sub-refrigerated space, retain the water vapor and increase the humidity.

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