Independent temperature control three-temperature-zone refrigeration equipment with single evaporator

Abstract

The utility model is applicable to refrigeration equipment, and discloses independent temperature control three-temperature-zone refrigeration equipment with a single evaporator, which comprises a shell and an inner container, a back plate of the inner container is connected with an air deflector, and an air guide cavity is formed between the air deflector and the back plate of the inner container; the fan and the evaporator are arranged in the air guide chamber; a first temperature area, a second temperature area and a third temperature area which are mutually independent are formed in the inner container, and each temperature area is provided with an air return opening used for returning air to the air guide cavity; a first air inlet duct, a second air inlet duct and a third air inlet duct are further arranged on the back plate of the inner container, the three air ducts are used for conveying cold air to the first temperature area, the second temperature area and the third temperature area respectively, each air duct is provided with an air door, and during refrigeration, the flow of the first air inlet duct is larger than that of the second air inlet duct and that of the third air inlet duct. When the first temperature zone is farthest from the evaporator, more energy loss can be caused in the refrigeration process, refrigeration of the first temperature zone is completed firstly, and energy loss in the conveying process can be reduced to the maximum extent.

Description

Technical Field

[0001] The utility model relates to the field of refrigeration equipment, in particular to an independent temperature-controlled three-temperature-zone refrigeration equipment with a single evaporator. Background Art

[0002] Multi-temperature zone refrigeration equipment is designed to meet the storage needs of different types of food. For example, different types and grades of wine have different requirements for storage environment. By storing different wines in different temperature zones, the optimal storage conditions for each wine can be maintained to ensure its quality and taste.

[0003] Traditional three-zone wine cabinet systems utilize a single evaporator to achieve three temperature zones: one fixed temperature zone has a set temperature that cannot be higher than the set temperatures of the other two zones. A fan delivers cold air from the low-temperature zone to the other two high-temperature zones, creating three storage temperature zones. These three zones cannot be completely independently controlled and affect each other. When the system uses one condenser and three evaporators, a one-to-three solenoid valve controls the refrigerant entering each evaporator, achieving independent temperature control for the three evaporators. Each evaporator is equipped with an evaporating fan, and the three evaporators cannot be cooled simultaneously. Zoned cooling is achieved through a controller and solenoid valve, achieving independent temperature control for the three zones. This method requires a four-way solenoid valve, three evaporators, and three evaporating fans, resulting in high cost and energy consumption. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a three-temperature-zone refrigeration device with independent temperature control and a single evaporator.

[0005] A single-evaporator, independently temperature-controlled, three-zone refrigeration device comprises a housing, an inner container, and a refrigeration element, wherein the refrigeration element comprises a compressor, a condenser, a fan, and an evaporator, and is characterized in that an air guide plate is connected to the back plate of the inner container, and an air guide chamber is formed between the air guide plate and the back plate of the inner container;

[0006] The fan and the evaporator are arranged in the air guide chamber;

[0007] The inner tank is formed with a first temperature zone, a second temperature zone and a third temperature zone which are independent of each other, and each temperature zone is provided with a return air port for returning gas to the air guide chamber;

[0008] A first air inlet duct, a second air inlet duct and a third air inlet duct are also provided on the back panel of the inner tank. The three ducts are used to transport cold air to the first temperature zone, the second temperature zone and the third temperature zone respectively. Each duct is provided with an air damper. During cooling, the flow rate of the first air inlet duct is greater than the flow rate of the second air inlet duct and the third air inlet duct.

[0009] To be more specific, in the above technical solution, a first diverter portion and a second diverter portion are provided on the air guide plate, the first diverter portion is used to divert the airflow to the first air inlet duct and the second air inlet duct, and the second diverter portion is used to divert the airflow of the first air inlet duct to both sides of the first temperature zone.

[0010] More specifically, in the above technical solution, a plurality of first temperature zone air inlets are provided on both sides of the first air inlet duct from top to bottom.

[0011] More specifically, in the above technical solution, the air inlet of the first temperature zone located at the top is provided with an inclined surface facing the first temperature zone.

[0012] More specifically, in the above technical solution, after the first diverter diverts the airflow to the second air inlet duct, the width of the second air inlet duct first gradually increases and then gradually decreases.

[0013] To be more specific, in the above technical solution, a second temperature zone air inlet is provided at the end of the second air inlet duct, and a curved surface facing the second temperature zone air inlet is provided at a position close to the second temperature zone air inlet of the second air inlet duct.

[0014] More specifically, in the above technical solution, the air guide plate is further provided with a fan fixing groove, and the fan is fixed in the fan fixing groove.

[0015] More specifically, in the above technical solution, the first temperature zone, the second temperature zone and the third temperature zone are arranged in sequence from top to bottom, the fan is located in the middle of the air guide chamber, and the evaporator is located in the lower part of the air guide chamber;

[0016] The wind guide plate is further provided with a wind guide cover, the opening of the wind guide cover faces the first diversion part, the fan is located in the wind guide cover, and the wind guide cover also forms the third air inlet duct.

[0017] More specifically, in the above technical solution, the evaporator is connected to a heating element, and the first temperature zone, the second temperature zone, and the third temperature zone are respectively provided with a heating compensation element and a temperature sensing element, and the temperature sensing element is used to sense the actual temperature of each temperature zone;

[0018] When the set temperature of one temperature zone is higher than the actual temperature and the set temperature of two temperature zones is lower than the actual temperature, the fan and the damper and heating element of the high temperature zone are turned on. When it is detected that the actual temperature of the high temperature zone has reached the set temperature, the fan and the damper of the high temperature zone are closed, and the compressor is started. After pre-cooling, the fan and the dampers of the two low temperature zones are opened for cooling. During this period, if the actual temperature of the high temperature zone is 2°C lower than the set temperature, the heating compensation element of the high temperature zone is turned on until the high temperature zone reaches the set temperature. The damper and heating compensation element of the high temperature zone are closed. When it is detected that all three temperature zones have reached the temperature, the compressor stops and all dampers are closed.

[0019] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0020] When the first temperature zone is farthest from the evaporator and the fan, the energy loss during the cooling process is the greatest. Therefore, by increasing the flow rate of the first air inlet duct, it can be ensured that the first temperature zone obtains sufficient cold air first, so that the first temperature zone quickly reaches the required temperature, thereby improving the cooling efficiency of the first temperature zone. In addition, when the first temperature zone is farthest from the evaporator and the fan, there may be energy loss in transporting cold air to this temperature zone. Therefore, in order to reduce the energy loss caused by this distance, a larger flow rate needs to be provided to ensure that the first temperature zone reaches the target temperature more quickly.

[0021] On the other hand, each temperature zone has its own independent air inlet duct and damper, which means that the air volume and cooling effect of each temperature zone can be more finely controlled. Compared with a multi-damper system, this design can more precisely adjust the temperature of each temperature zone and provide more personalized cooling. Compared with a multi-damper system, this individual air duct design may also use energy more efficiently and reduce unnecessary cooling losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is a schematic diagram of an explosion structure of the utility model;

[0024] Figure 2 This is a schematic cross-sectional view of the rear portion of the inner container of the present invention;

[0025] Figure 3 This is a partial structural diagram of the first air inlet duct of the utility model;

[0026] Figure 4 This is a partial structural diagram of the second air inlet duct of the utility model;

[0027] Figure 5 This is a side sectional structural schematic diagram of the utility model;

[0028] Figure 6 This is a structural diagram of the refrigeration element of the utility model.

[0029] In the figure: 1. Shell; 2. Inner tank; 3. Compressor; 4. Condenser; 5. Fan; 6. Evaporator; 7. Air guide plate; 8. Air guide chamber; 9. First temperature zone; 10. Second temperature zone; 11. Third temperature zone; 12. First air inlet duct; 13. Second air inlet duct; 14. Third air inlet duct; 15. First diverter; 16. Second diverter; 17. First temperature zone air inlet; 18. Inclined surface; 19. Second temperature zone air inlet; 20. Curved surface; 21. Capillary; 22. Air guide cover; 23. Heating element; 24. Heating compensation element; 25. Dry filter; 26. Air damper; 27. Return air outlet. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0032] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0033] In addition, in the description of the utility model specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0034] References to "one embodiment" or "some embodiments" in this specification mean that one or more embodiments of the present invention include a particular feature, structure, or characteristic described in conjunction with that embodiment. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in yet other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more but not all embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0035] This application defines a refrigeration device, which may specifically be a refrigerator, but may also be a wine cabinet, freezer, cigarette cabinet, beef cabinet, tea bar, or other product with refrigeration and storage capabilities. The features of this application are preferably used in wine cabinets. For example, different types and grades of wine have different storage environment requirements. By storing different wines in different temperature zones, the optimal storage conditions for each wine can be maintained, thereby ensuring its quality and taste.

[0036] See also Figure 1 , the present application proposes a single evaporator independent temperature control three-zone refrigeration device, comprising a shell 1, an inner tank 2 and a refrigeration element, the refrigeration element comprising a compressor 3, a condenser 4, a fan 5 and an evaporator 6, the back plate of the inner tank 2 is connected to an air guide plate 7, and an air guide chamber 8 is formed between the air guide plate 7 and the back plate of the inner tank 2; the fan 5 and the evaporator 6 are arranged in the air guide chamber 8; the inner tank 2 is formed with a first temperature zone 9, a second temperature zone 10 and a third temperature zone 11 which are independent of each other, each temperature zone is respectively provided with a return air port 27 for returning gas to the air guide chamber 8; a first air inlet duct 12, a second air inlet duct 13 and a third air inlet duct 14 are also provided on the back plate of the inner tank 2, the three air ducts are used to transport cold air to the first temperature zone 9, the second temperature zone 10 and the third temperature zone 11 respectively, and each air duct is provided with a damper 26. During cooling, the flow rate of the first air inlet duct 12 is greater than the flow rate of the second air inlet duct 13 and the third air inlet duct 14.

[0037] like Figure 5 As shown, when the first temperature zone 9 is farthest from the evaporator 6 and the fan 5, the energy loss during the cooling process is the greatest. Therefore, by increasing the flow rate of the first air inlet duct 12, it can be ensured that the first temperature zone 9 first obtains sufficient cold air so that the first temperature zone 9 quickly reaches the required temperature, thereby improving the cooling efficiency of the first temperature zone 9. In addition, when the first temperature zone 9 is farthest from the evaporator 6 and the fan 5, there may be energy loss in transporting cold air to this temperature zone. Therefore, in order to reduce the energy loss caused by this distance, a larger flow rate needs to be provided to ensure that the first temperature zone 9 reaches the target temperature more quickly.

[0038] On the other hand, the single air duct approach will lead to a decrease in cooling efficiency, because multiple temperature zones share one air supply path. When different temperatures need to be controlled, the damper 26 needs to be adjusted frequently, resulting in unsatisfactory cooling effect and increased energy waste. In the present application, each temperature zone has an independent air inlet duct and damper 26, which means that the air intake volume and cooling effect of each temperature zone can be controlled more finely. Air inlet ducts with different flow rates can more effectively distribute cold air to different temperature zones, ensuring that each area can quickly reach the set temperature. Compared with the single-duct multi-damper 26 system, this design can more accurately adjust the temperature of each temperature zone, provide more personalized cooling, more effectively use energy, and reduce unnecessary cooling losses.

[0039] The present application designs a three-temperature zone refrigeration device based on a single evaporator 6 and a single condenser 4. The refrigeration device uses three dampers 26, three air inlet ducts and an evaporating fan 5 to achieve independent temperature control of the three temperature zones; the dampers 26 and the entire air duct system are used in conjunction to achieve independent control of the cooling rate and temperature of each temperature zone. Controlling the opening of the dampers 26 can control the cooling rate of each temperature zone.

[0040] Refrigeration is completed by a single evaporator 6 system, in which each temperature zone is temperature-regulated by an air duct switch. Each temperature zone can be independently temperature-controlled. Each layer can be equipped with a heating compensation element 24 for scheduling and rising and falling adjustments. An independent air duct circulation system is configured for separate air intake and return air. Each temperature duct is not affected and can be adjusted freely without temperature fluctuations.

[0041] Using a single evaporator 6 and a single fan 5, the system has less noise and lower cost than the traditional three-temperature zone system of refrigeration equipment. The independent temperature control is stable and the energy consumption is lower than the old system with three evaporators 6 and three fans 5 and the single evaporator 6 and three fans 5 system.

[0042] It is understandable that the refrigeration element is a commonly used component in this field, and the specific components are not limited in this application. Those skilled in the art can adjust according to actual needs. Figure 6 As shown, the refrigeration element includes a compressor 3, a condenser 4 and an evaporator 6. The compressor 3 is connected to the condenser 4, the condenser 4 is connected to the drying filter 25, the drying filter 25 is connected to the capillary tube 21, the capillary tube 21 is connected to the evaporator 6, and the evaporator 6 is further connected to the compressor 3 to form a cold air circuit.

[0043] The compressor 3 compresses the gaseous coolant at room temperature and pressure into a gaseous coolant at high temperature and high pressure. After the condenser 4 converts the gaseous coolant delivered by the compressor 3 into a high-pressure liquid coolant, the dry filter 25 removes impurities that may exist in the condenser 4 to ensure that the working medium in the refrigeration system is pure, and then it is delivered to the capillary tube 21 for throttling and pressure reduction. After the capillary tube 21 reduces the pressure, the liquid coolant is delivered to the evaporator 6. The evaporator 6 is used to perform heat exchange treatment on the gas in the air guide chamber 8. During the heat exchange treatment, the evaporator 6 converts the liquid coolant into a gaseous coolant and delivers the gaseous coolant to the compressor 3 for circulating refrigeration.

[0044] In some embodiments, as Figure 2 As shown, a first diverter portion 15 and a second diverter portion 16 are provided on the air guide plate 7. The first diverter portion 15 is used to divert the airflow to the first air inlet duct 12 and the second air inlet duct 13. The second diverter portion 16 is used to divert the airflow of the first air inlet duct 12 to both sides of the first temperature zone 9.

[0045] The first diversion portion 15 diverts the cold air to the first air inlet duct 12 and the second air inlet duct 13, more effectively delivering the cold air to the first temperature zone 9 and the second temperature zone 10, making maximum use of the cold air provided by the system, improving the overall cooling effect, and ensuring that the first temperature zone can quickly reach the required temperature.

[0046] The second diversion portion 16 diverts the airflow of the first air inlet duct 12 to both sides of the first temperature zone 9, thereby increasing the volume of gas flowing through the first air inlet duct 12 per unit time and improving the flow rate of the first air inlet duct 12 to ensure that the first temperature zone 9 first obtains sufficient cold air so that the first temperature zone 9 quickly reaches the required temperature, thereby improving the cooling efficiency of the first temperature zone 9; and the second diversion portion 16 makes the airflow distribution of the first air inlet duct 12 more uniform, increases the range of airflow coverage, avoids partial areas of the first temperature zone 9 being affected by uneven airflow, and improves cooling efficiency.

[0047] In some embodiments, as Figure 2 As shown, a plurality of first temperature zone air inlets 17 are provided on both sides of the first air inlet duct 12 from top to bottom.

[0048] The provision of multiple air inlets allows for more even distribution of cold air on both sides of the first air inlet duct 12, helping to ensure that different areas of the first temperature zone 9 receive sufficient cold air and avoiding significant temperature variations between zones. This even distribution of cold air means that the entire first temperature zone 9 can reach the desired temperature more quickly, improving cooling efficiency and making the cooling process faster and more uniform. Furthermore, multiple air inlets ensure that items stored in different locations are exposed to similar ambient temperatures, helping to meet the consistent storage requirements for wines of the same type and grade.

[0049] In some embodiments, as Figure 3 As shown, the first temperature zone air inlet 17 located at the top is provided with an inclined surface 18 facing the first temperature zone 9 .

[0050] The air enters the first temperature zone air inlet 17 at an angle, which can reduce the loss of cold air from the top or scattering to other areas, keep the cold air flowing more concentratedly to the first temperature zone 9, reduce energy waste, and improve cooling efficiency.

[0051] In some embodiments, as Figure 4 As shown, after the first diverter 15 diverts the airflow to the second air inlet duct 13 , the width of the second air inlet duct 13 first gradually increases and then gradually decreases.

[0052] The gradually increasing width can reduce the air flow velocity, which helps to reduce the pressure of the air flow when entering the second air inlet duct 13; and the gradually decreasing width helps to maintain a more stable air flow state in the air supply duct and reduce energy loss.

[0053] In some embodiments, as Figure 4 As shown, a second temperature zone air inlet 19 is provided at the end of the second air inlet duct 13 , and a curved surface 20 facing the second temperature zone air inlet 19 is provided at a position close to the second temperature zone air inlet 19 of the second air inlet duct 13 .

[0054] The design of the curved surface 20 can reduce the resistance of the airflow, allowing the airflow to enter the second temperature zone 10 more smoothly, reducing energy loss, and helping to maintain the stability of the airflow.

[0055] In some embodiments, the air guide plate 7 is further provided with a fan fixing groove (not shown), and the fan 5 is fixed in the fan fixing groove.

[0056] The fan fixing groove can ensure that the fan 5 is firmly mounted on the air guide plate 7, and can prevent the fan 5 from vibrating or resonating during operation, thereby reducing noise and maintaining system stability.

[0057] The fan 5 can be fixed in the fan fixing slot by means of buckles or bolts.

[0058] like Figure 5 As shown, in some embodiments, the first temperature zone 9, the second temperature zone 10 and the third temperature zone 11 are arranged sequentially from top to bottom, the fan 5 is located in the middle of the air guide chamber 8, and the evaporator 6 is located in the lower part of the air guide chamber 8;

[0059] The wind guide plate 7 is further provided with a wind guide cover 22 , the opening of the wind guide cover 22 faces the first diversion portion 15 , the fan 5 is located in the wind guide cover 22 , and the wind guide cover 22 also forms a third air inlet duct 14 .

[0060] The air guide cover 22 helps to guide the airflow toward the first diverter portion 15 and the third air inlet duct 14, which can improve the diversion and guiding effects of the airflow, make the air supply more targeted, and improve the cooling efficiency.

[0061] In some embodiments, as Figure 5 As shown, the evaporator 6 is connected to a heating element 23, and the first temperature zone 9, the second temperature zone 10 and the third temperature zone 11 are respectively provided with a heating compensation element 24 and a temperature sensing element (not shown), and the temperature sensing element is used to sense the actual temperature of each temperature zone;

[0062] When the set temperature of one temperature zone is higher than the actual temperature and the set temperatures of two temperature zones are lower than the actual temperatures, the fan 5 and the damper 26 and heating element 23 of the high temperature zone are turned on. When it is detected that the actual temperature of the high temperature zone has reached the set temperature, the fan 5 and the damper 26 of the high temperature zone are turned off, and the compressor 3 is started. After pre-cooling, the fan 5 and the dampers 26 of the two low temperature zones are turned on for cooling. During this period, if the actual temperature of the high temperature zone is 2°C lower than the set temperature, the heating compensation element 24 of the high temperature zone is turned on until the high temperature zone reaches the set temperature. The damper 26 and the heating compensation element 24 of the high temperature zone are turned off. When it is detected that all three temperature zones have reached the temperature, the compressor 3 stops and all dampers 26 are closed.

[0063] Ensure that after the high temperature zone reaches the set temperature, other temperature zones can also reach the required temperature within an appropriate time to achieve overall temperature balance.

[0064] A heating element 23 is installed at the bottom of the evaporator 6. When frost forms on the system, this element 23 heats and melts the frost on the windward side of the evaporator 6. When the temperature in a certain temperature zone within the cabinet falls below the set point, the compressor 3 stops and the heating element 24 operates, heating the return air entering the evaporator 6. The air is then delivered back to each temperature zone by the fan 5, maintaining the temperature within that zone at the set point. The heating power of the heating element 24 can be adjusted by the input current to prevent the return air temperature from rising too high.

[0065] The independent three-temperature zone air duct system is cooled by the evaporator 6 and then the air is transported from the air duct to each temperature zone by the centrifugal fan 5. The temperature is controlled by the opening and closing of the damper 26, and the temperature of each temperature zone is monitored by the temperature sensing element, thereby closing the air duct and opening and closing the heating compensation element 24. Each temperature zone is an independent circulation air duct system, and there is no cross-connection of the air ducts to affect the independence of each air duct.

[0066] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the scope of protection of the present invention.

Claims

1. A single evaporator independent temperature control three-zone refrigeration device, comprising a shell, an inner tank and a refrigeration element, wherein the refrigeration element comprises a compressor, a condenser, a fan and an evaporator, characterized in that: The back plate of the inner container is connected to an air guide plate, and an air guide chamber is formed between the air guide plate and the back plate of the inner container; The fan and the evaporator are arranged in the air guide chamber; The inner tank is formed with a first temperature zone, a second temperature zone and a third temperature zone which are independent of each other, and each temperature zone is provided with a return air port for returning gas to the air guide chamber; The back panel of the inner liner is further provided with a first air inlet duct, a second air inlet duct and a third air inlet duct, the three air ducts are used to transport cold air to the first temperature zone, the second temperature zone and the third temperature zone respectively, each air duct is provided with a damper, and during cooling, the flow rate of the first air inlet duct is greater than the flow rate of the second air inlet duct and the third air inlet duct; The first temperature zone, the second temperature zone and the third temperature zone are arranged in sequence from top to bottom, the fan is located in the middle of the air guide chamber, the evaporator is located in the lower part of the air guide chamber, and the first temperature zone is farthest from the evaporator and the fan.

2. The independent temperature-controlled three-zone refrigeration equipment with a single evaporator according to claim 1, characterized in that: The air guide plate is provided with a first diverter portion and a second diverter portion, the first diverter portion is used to divert the airflow to the first air inlet duct and the second air inlet duct, and the second diverter portion is used to divert the airflow in the first air inlet duct to both sides of the first temperature zone.

3. The independent temperature-controlled three-zone refrigeration equipment with a single evaporator according to claim 2, characterized in that: A plurality of first temperature zone air inlets are provided on both sides of the first air inlet duct from top to bottom.

4. The independent temperature-controlled three-zone refrigeration equipment with a single evaporator according to claim 3, characterized in that: The first temperature zone air inlet located at the top is provided with an inclined surface facing the first temperature zone.

5. The independent temperature-controlled three-zone refrigeration equipment with a single evaporator according to claim 2, characterized in that: After the first diverter diverts the airflow to the second air inlet duct, the width of the second air inlet duct first gradually increases and then gradually decreases.

6. The independent temperature-controlled three-zone refrigeration equipment with a single evaporator according to claim 5, characterized in that: A second temperature zone air inlet is provided at the end of the second air inlet duct, and a curved surface facing the second temperature zone air inlet is provided at a position of the second air inlet duct close to the second temperature zone air inlet.

7. The independent temperature-controlled three-zone refrigeration device with a single evaporator according to any one of claims 2 to 6, characterized in that: The air guide plate is further provided with a fan fixing groove, and the fan is fixed in the fan fixing groove.

8. The independent temperature-controlled three-zone refrigeration equipment with a single evaporator according to claim 7, characterized in that: The wind guide plate is further provided with a wind guide cover, the opening of the wind guide cover faces the first diversion part, the fan is located in the wind guide cover, and the wind guide cover forms the third air inlet duct.

9. The independent temperature-controlled three-zone refrigeration equipment with a single evaporator according to claim 1, characterized in that: The evaporator is connected to a heating element, and the first temperature zone, the second temperature zone and the third temperature zone are respectively provided with a heating compensation element and a temperature sensing element, and the temperature sensing element is used to sense the actual temperature of each temperature zone; When the set temperature of one temperature zone is higher than the actual temperature and the set temperature of two temperature zones is lower than the actual temperature, the fan and the damper and heating element of the high temperature zone are turned on. When it is detected that the actual temperature of the high temperature zone has reached the set temperature, the fan and the damper of the high temperature zone are closed, and the compressor is started. After pre-cooling, the fan and the dampers of the two low temperature zones are opened for cooling. During this period, if the actual temperature of the high temperature zone is 2°C lower than the set temperature, the heating compensation element of the high temperature zone is turned on until the high temperature zone reaches the set temperature. The damper and heating compensation element of the high temperature zone are closed. When it is detected that all three temperature zones have reached the temperature, the compressor stops and all dampers are closed.

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