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

Abstract

An independent temperature control three-temperature-zone refrigeration device with a single evaporator, comprising a housing (1) and an inner container (2), wherein an air deflector plate (7) is connected to a back plate of the inner container (2), and an air deflection chamber (8) is formed between the air deflector plate (7) and the back plate of the inner container (2); a fan (5) and an evaporator (6) are arranged in the air deflection chamber (8); a first temperature zone (9), a second temperature zone (10) and a third temperature zone (11) independent of each other are formed in the inner container (2), and each temperature zone is provided with an air return port (27) for returning air to the air deflection chamber (8); and the back plate of the inner container (2) is further provided with a first air intake duct (12), a second air intake duct (13) and a third air intake duct (14), the three air ducts being respectively used for transferring cold air to the first temperature zone (9), the second temperature zone (10) and the third temperature zone (11), each air duct being provided with an air damper (26), and during refrigeration, the flow rate of the first air intake duct (12) being greater than the flow rate of the second air intake duct (13) and the third air intake duct (14). When the first temperature zone (9) is farthest away from the evaporator (6), relatively large energy loss occurs during the refrigeration process thereof; and prioritizing the refrigeration of the first temperature zone (9) can minimize the energy loss during the transfer process.

Description

Single-evaporator independent temperature control three-temperature-zone refrigeration equipment TECHNICAL FIELD

[0001] The present application relates to the field of refrigeration equipment, in particular to a single-evaporator independent temperature control three-temperature-zone refrigeration equipment. BACKGROUND

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

[0003] The traditional three-temperature-zone wine cabinet system uses a single evaporator to achieve three temperature zones. One of the temperature zones is fixed, and the set temperature of this temperature zone cannot be higher than that of the other two temperature zones. The low-temperature-zone cold air is sent to the other two high-temperature zones by a fan to achieve three storage temperature zones. The three temperature zones cannot achieve completely independent temperature control and affect each other. When the system uses one condenser and three evaporators, the refrigerant enters each evaporator through a one-to-three electromagnetic valve to achieve independent temperature control of the three evaporators. Each evaporator is equipped with an evaporative fan, and the three evaporators cannot cool at the same time. The controller and electromagnetic valve are used for partition cooling to achieve independent temperature control of the three temperature zones. This method requires an electromagnetic four-way valve, plus three evaporators and three evaporative fans, which has high cost and energy consumption. SUMMARY

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

[0005] A single-evaporator independent temperature control three-temperature-zone refrigeration equipment, comprising a shell, an inner container and a refrigeration element, the refrigeration element comprising a compressor, a condenser, a fan and an evaporator, characterized in that a back plate of the inner container is connected with a guide vane, and a guide chamber is formed between the guide vane and the back plate of the inner container.

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

[0007] The inner container forms 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 guide chamber.

[0008] The back plate of the inner container is further provided with a first air inlet duct, a second air inlet duct and a third air inlet duct, and the three air inlet ducts are used for delivering cold air to the first temperature zone, the second temperature zone and the third temperature zone, respectively. Each air inlet duct is provided with an air door. During refrigeration, the flow rate of the first air inlet duct is greater than that of the second air inlet duct and the third air inlet duct.

[0009] More specifically, in the above technical solution, the air deflector is provided with a first flow dividing part and a second flow dividing part, the first flow dividing part is used to divide the airflow to the first air inlet duct and the second air inlet duct, and the second flow dividing part is used to divide 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 arranged on both sides of the first air inlet duct from top to bottom.

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

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

[0013] More specifically, in the above technical solution, the second air inlet duct is provided with a second temperature zone air inlet at the end, and the second air inlet duct is provided with an arc surface facing the second temperature zone air inlet at a position close to the second temperature zone air inlet.

[0014] More specifically, in the above technical solution, the air deflector 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 deflection chamber, and the evaporator is located in the lower part of the air deflection chamber.

[0016] The air deflector is further provided with an air deflection cover, the opening of the air deflection cover faces the first flow dividing part, the fan is located in the air deflection cover, and the air deflection cover further forms the third air inlet duct.

[0017] More specifically, in the above technical solution, the evaporator is connected with a heating element, 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, the damper of the high-temperature zone, and the heating element 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 turned off, and the compressor is started. After pre-cooling, the fan and the dampers of the two low-temperature zones are opened for refrigeration. If the actual temperature of the high-temperature zone is lower than the set temperature by 2℃, the heating compensation element of the high-temperature zone is turned on until the high-temperature zone reaches the set temperature, and the damper and the heating compensation element of the high-temperature zone are turned off. When it is detected that all three temperature zones have reached the temperature, the compressor is stopped, and all dampers are turned off.

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

[0020] When the first temperature zone is farthest from the evaporator and the fan, the energy loss is the largest during the refrigeration process. Therefore, by increasing the flow of the first air inlet duct, it can be ensured that the first temperature zone is first supplied with sufficient cold air so that the first temperature zone can quickly reach the required temperature, thereby improving the refrigeration 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, reducing the energy loss caused by this distance requires providing a larger flow to ensure that the first temperature zone reaches the target temperature more quickly.

[0021] On the other hand, each temperature zone has an independent air inlet duct and damper, which means that the air inlet amount and refrigeration effect of each temperature zone can be controlled more meticulously. Compared with a multi-damper system, this design can more accurately adjust the temperature of each temperature zone and provide more personalized refrigeration. Compared with a multi-damper system, this separate duct design can more effectively utilize energy and reduce unnecessary refrigeration loss. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort.

[0023] FIG. 1 is an exploded structural schematic diagram of the present application;

[0024] FIG. 2 is a schematic diagram of the cross-sectional structure of the rear part of the inner container of the present application;

[0025] FIG. 3 is a schematic diagram of the partial structure of the first air inlet duct of the present application;

[0026] FIG. 4 is a schematic diagram of the partial structure of the second air inlet duct of the present application;

[0027] FIG. 5 is a schematic diagram of the side cross-sectional structure of the present application;

[0028] Fig. 6 is a structural schematic diagram of the refrigeration element of the present application.

[0029] In the figure: 1, housing; 2, inner container; 3, compressor; 4, condenser; 5, fan; 6, evaporator; 7, air deflector; 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 air distribution part; 16, second air distribution part; 17, first temperature zone air inlet; 18, inclined surface; 19, second temperature zone air inlet; 20, arc surface; 21, capillary tube; 22, air deflector cover; 23, heating element; 24, heating compensation element; 25, drying filter; 26, air door; 27, air return. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0031] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation on the present application.

[0032] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be understood broadly, and those skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solutions.

[0033] In addition, in the description of the present application and the appended claims, the terms "first", "second", "third", etc. are only used for distinguishing description, and cannot be understood as indicating or implying relative importance.

[0034] Reference in the specification to "one embodiment" or "some embodiments" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. The appearances of the phrase "in one embodiment" or "in some embodiments" in various places in the specification are not necessarily all referring to the same embodiment, although it can. The terms "including," "comprising," "having" and variations thereof are meant to encompass the items listed thereafter and equivalents thereof as well as additional items.

[0035] The application defines a refrigeration device, which can be a refrigerator in particular, and can also be a wine cabinet, a freezer, a tobacco cabinet, a beef cabinet, a tea bar machine and other products with refrigeration and storage capabilities. The features of the application are preferably used in a wine cabinet. Different types and grades of wine have different storage environment requirements. By storing different wines in different temperature zones, the optimal storage conditions of each type of wine can be maintained to ensure its quality and taste.

[0036] Referring to FIG. 1, the application provides a single-evaporator independent temperature control three-temperature-zone refrigeration device, which includes a shell 1, an inner container 2 and a refrigeration element. The refrigeration element includes a compressor 3, a condenser 4, a fan 5 and an evaporator 6. The back plate of the inner container 2 is connected with a guide vane 7, and a guide vane chamber 8 is formed between the guide vane 7 and the back plate of the inner container 2. The fan 5 and the evaporator 6 are arranged in the guide vane chamber 8. The inner container 2 forms 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 provided with a return air port 27 for returning air to the guide vane chamber 8. The back plate of the inner container 2 is further provided with a first air inlet duct 12, a second air inlet duct 13 and a third air inlet duct 14. The three air inlet ducts are used to deliver cold air to the first temperature zone 9, the second temperature zone 10 and the third temperature zone 11 respectively. Each air inlet duct is provided with an air door 26. During refrigeration, the flow rate of the first air inlet duct 12 is greater than that of the second air inlet duct 13 and the third air inlet duct 14.

[0037] As shown in FIG. 5, when the first temperature zone 9 is farthest from the evaporator 6 and the fan 5, the energy loss during the refrigeration process is the largest. Therefore, by increasing the flow rate of the first air inlet duct 12, it can be ensured that the first temperature zone 9 is the first to obtain sufficient cold air, so that the first temperature zone 9 can quickly reach the required temperature and improve the refrigeration 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 can be energy loss in delivering cold air to this temperature zone. Therefore, to reduce the energy loss caused by this distance, a greater flow rate needs to be provided to ensure that the first temperature zone 9 can reach the target temperature more quickly.

[0038] On the other hand, the single air duct mode can cause the refrigeration efficiency to decrease, because multiple temperature zones share one air supply path, and the air door 26 needs to be adjusted frequently when different temperatures need to be controlled, resulting in unsatisfactory refrigeration effect and increased energy waste; in the present application, each temperature zone has an independent air inlet duct and air door 26, which means that the air inlet amount and refrigeration effect of each temperature zone can be controlled more meticulously, and the air inlet ducts with different flow rates can more effectively distribute cold air to different temperature zones, ensuring that each region can quickly reach the set temperature; compared with the single-duct multi-air door 26 system, this design can more accurately adjust the temperature of each temperature zone, provide more personalized refrigeration, more effectively utilize energy, and reduce unnecessary refrigeration loss.

[0039] The present application designs a three-temperature-zone refrigeration device based on a single evaporator 6 and a single condenser 4, which realizes independent temperature control of three temperature zones by using three air doors 26, three air inlet ducts, and one evaporative air fan 5; the air door 26 is used in cooperation with the entire air duct system to realize independent control of the cooling speed and temperature of each temperature zone, and the opening degree of the control air door 26 can control the cooling speed of each temperature zone.

[0040] The single evaporator 6 system is used to complete refrigeration, wherein each temperature zone is adjusted in temperature by an air duct switch, each temperature zone can be independently controlled in temperature, each layer can be configured with a heating compensation element 24 for scheduling and adjusting the temperature, and an independent air duct circulation system is configured to independently perform air inlet and return air, and each temperature air duct is not affected and can be freely adjusted without temperature mixing.

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

[0042] It can be understood that the refrigeration element is a commonly used part in the art, and the specific parts are not limited in the present application, and those skilled in the art can adjust them according to actual needs. Optionally, as shown in FIG. 6, the refrigeration element includes a compressor 3, a condenser 4, and an evaporator 6, the compressor 3 is connected with the condenser 4, the condenser 4 is connected with a drying filter 25, the drying filter 25 is connected with a capillary tube 21, the capillary tube 21 is connected with the evaporator 6, and the evaporator 6 is connected with the compressor 3 to form a cold air loop.

[0043] The compressor 3 compresses the gaseous coolant at normal temperature and pressure into high-temperature and high-pressure gaseous coolant. The condenser 4 converts the gaseous coolant delivered by the compressor 3 into high-pressure liquid coolant. The dry filter 25 is used to remove impurities that may exist in the condenser 4, so as to ensure that the working medium in the refrigeration system is pure. The liquid coolant is then delivered to the capillary tube 21 for pressure reduction. The capillary tube 21 delivers the liquid coolant to the evaporator 6 after pressure reduction. The evaporator 6 exchanges heat with the gas in the air guide chamber 8. During the heat exchange process, the liquid coolant is converted into gaseous coolant, which is delivered to the compressor 3 for circulation refrigeration.

[0044] In some embodiments, as shown in FIG. 2, the air deflector 7 is provided with a first flow dividing part 15 and a second flow dividing part 16. The first flow dividing part 15 is used to divide the air flow into the first air inlet duct 12 and the second air inlet duct 13. The second flow dividing part 16 is used to divide the air flow in the first air inlet duct 12 into two sides of the first temperature zone 9.

[0045] The first flow dividing part 15 divides the cold air into the first air inlet duct 12 and the second air inlet duct 13, which can more effectively deliver the cold air to the first temperature zone 9 and the second temperature zone 10, maximize the use of the cold air provided by the system, improve the overall refrigeration effect, and ensure that the first temperature zone can quickly reach the required temperature.

[0046] The second flow dividing part 16 divides the air flow in the first air inlet duct 12 into two sides of the first temperature zone 9, which increases the volume of the gas flowing in the first air inlet duct 12 per unit time, improves the flow rate of the first air inlet duct 12, and ensures that the first temperature zone 9 can first obtain sufficient cold air, so as to quickly reach the required temperature and improve the refrigeration efficiency of the first temperature zone 9. The second flow dividing part 16 also makes the air flow in the first air inlet duct 12 more evenly distributed, increases the range of air flow coverage, avoids the influence of uneven air flow on some areas of the first temperature zone 9, and improves the refrigeration efficiency.

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

[0048] The arrangement of multiple air inlets can achieve more uniform distribution of cold air on both sides of the first air inlet duct 12, which helps to ensure that different parts of the first temperature zone 9 can obtain sufficient cold air and avoid large temperature differences between different areas. Uniform distribution of cold air means that the entire first temperature zone 9 can more quickly reach the required temperature, which improves the refrigeration efficiency and makes the cooling process faster and more uniform. In addition, multiple air inlets can ensure that the items placed in different positions can be in a similar environment temperature, which is conducive to meeting the same storage environment requirements of the same type and same grade of wine.

[0049] In some embodiments, as shown in FIG. 3, the first- uppermost-located temperature zone air inlet 17 is provided with an inclined surface 18 facing the first temperature zone 9.

[0050] The inclined gas entry into the first temperature zone air inlet 17 can reduce the loss or scattering of cold air from the top to other areas, keep the cold air more concentratedly flow to the first temperature zone 9, reduce the waste of energy, and improve the refrigeration efficiency.

[0051] In some embodiments, as shown in FIG. 4, the width of the second air inlet duct 13 gradually increases and then gradually decreases after the airflow is divided by the first flow dividing part 15.

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

[0053] In some embodiments, as shown in FIG. 4, the second air inlet duct 13 is provided with a second temperature zone air inlet 19 at the end thereof, and the second air inlet duct 13 is provided with an arc surface 20 facing the second temperature zone air inlet 19 at a position close to the second temperature zone air inlet 19.

[0054] Through the design of the arc surface 20, the resistance of the airflow can be reduced, the airflow can enter the second temperature zone 10 more smoothly, the energy loss can be reduced, and the stability of the airflow can be maintained.

[0055] In some embodiments, the air deflector 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 installed on the air deflector 7, which can prevent vibration or resonance generated by the fan 5 during operation, thereby reducing noise and maintaining the stability of the system.

[0057] The fan 5 can be fixed in the fan fixing groove by buckling or bolting.

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

[0059] The air deflector 7 is further provided with an air deflector cover 22, the opening of the air deflector cover 22 faces the first flow dividing part 15, the fan 5 is located in the air deflector cover 22, and the air deflector cover 22 further forms a third air inlet duct 14.

[0060] The air deflector cover 22 helps to guide the airflow towards the first flow dividing part 15 and the third air inlet duct 14, which can improve the airflow dividing and guiding effect, make the air supply more targeted, and improve the refrigeration efficiency.

[0061] In some embodiments, as shown in Fig. 5, the evaporator 6 is connected with a heating element 23, 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) for sensing the actual temperature of each temperature zone;

[0062] When the set temperature of a 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 of the high temperature zone are turned on, and the heating element 23 is 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 refrigeration; if the actual temperature of the high temperature zone is lower than the set temperature by 2℃ during the refrigeration, the heating compensation element 24 of the high temperature zone is turned on until the high temperature zone reaches the set temperature, and then the damper 26 and the heating compensation element 24 of the high temperature zone are turned off; when it is detected that all the three temperature zones reach the temperature, the compressor 3 is stopped, and all the dampers 26 are turned off.

[0063] The above ensures that after the high temperature zone reaches the set temperature, the other temperature zones can also reach the required temperature within a proper time, and the overall temperature is balanced.

[0064] The heating element 23 is installed at the bottom of the evaporator 6; when the system is frosting, the heating element 23 heats and melts the frost on the windward surface of the evaporator 6; when the temperature of a certain temperature zone in the box is lower than the set temperature, the compressor 3 stops working, and the heating compensation element 24 works to heat the return air entering the evaporator 6, which is sent back to each temperature zone by the fan 5 to maintain the temperature in the temperature zone to the set value. The heating power of the heating compensation element 24 can be adjusted by inputting the current size to avoid the temperature of the return air rising too high.

[0065] The independent three-temperature-zone air duct system is refrigerated by the evaporator 6, and the air is transported from the air duct to each temperature zone by the centrifugal fan 5; the temperature is controlled by the damper 26, and the temperature of each temperature zone is monitored by the temperature sensing element to close the air duct and turn on / off the heating compensation element 24; each temperature zone is an independent circulating air duct system, and there is no air duct connection to affect the independence of each air duct.

[0066] The above-described embodiments are only used to illustrate the technical solutions of the present application, but not limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalent ones; the modification or replacement does not change the essence of the corresponding technical solutions, and should be included in the protection scope of the present application.

Claims

1. A single evaporator independent temperature controlled triple temperature zone refrigeration appliance comprising a housing, an inner liner and refrigeration components, said refrigeration components comprising a compressor, a condenser, a fan and an evaporator, characterised in that, The back plate of the inner container is connected with a guide vane, and a guide chamber is formed between the back plate of the inner container and the guide vane; The fan and the evaporator are arranged in the guide chamber; The inner container forms first, second and third temperature zones which are independent of each other, and each temperature zone is provided with a return air port for returning air to the guide chamber; The back plate of the inner container is further provided with first, second and third air inlet channels, and the three air inlet channels are used for conveying cold air to the first, second and third temperature zones respectively, and each air inlet channel is provided with an air door, and the flow rate of the first air inlet channel is greater than that of the second and third air inlet channels during refrigeration; The first, second and third temperature zones are arranged in sequence from top to bottom, the fan is located in the middle of the guide chamber, the evaporator is located in the lower part of the guide chamber, and the first temperature zone is farthest from the evaporator and the fan.

2. The single evaporator independent temperature zone three temperature zone refrigeration appliance of claim 1, wherein, The guide vane is provided with first and second shunt portions, the first shunt portion is used for shunting air flow to the first and second air inlet channels, and the second shunt portion is used for shunting air flow of the first air inlet channel to both sides of the first temperature zone.

3. The single evaporator independent temperature zone three-temperature zone refrigeration apparatus according to claim 2, wherein, A plurality of first temperature zone air inlets are arranged on both sides of the first air inlet channel from top to bottom.

4. The single evaporator independent temperature zone three-temperature zone refrigeration apparatus according to claim 3, wherein, The uppermost first temperature zone air inlet is provided with an inclined surface facing the first temperature zone.

5. The single evaporator independent temperature zone three temperature zone refrigeration appliance of claim 2, wherein, After the first shunt portion shunts air flow to the second air inlet channel, the width of the second air inlet channel gradually increases and then gradually decreases.

6. The single evaporator independent temperature zone three-temperature zone refrigeration appliance of claim 5, wherein, The second air inlet channel is provided with a second temperature zone air inlet at the end thereof, and the second air inlet channel is provided with an arc surface facing the second temperature zone air inlet at a position close to the second temperature zone air inlet.

7. The single evaporator, independent temperature zone, triple temperature zone refrigeration appliance of any of claims 2-6, wherein, The guide vane is further provided with a fan fixing groove, and the fan is fixed in the fan fixing groove.

8. The single evaporator independent temperature zone three-temperature zone refrigeration apparatus according to claim 7, wherein, The guide vane is further provided with a guide cover, the opening of the guide cover faces the first shunt portion, the fan is located in the guide cover, and the guide cover forms the third air inlet channel.

9. The single evaporator independent temperature zone three-temperature zone refrigeration appliance of claim 1, wherein, The evaporator is connected with a heating element, the first, second and third temperature zones are respectively provided with a heating compensation element and a temperature sensing element, and the temperature sensing element is used for sensing the actual temperature of each temperature zone; When the set temperature of a temperature zone is higher than the actual temperature, and the set temperatures of two temperature zones are lower than the actual temperature, the fan, the air door of the high temperature zone and the heating element are turned on, when it is detected that the actual temperature of the high temperature zone reaches the set temperature, the fan and the air door of the high temperature zone are turned off, and the compressor is started, after pre-cooling, the fan and the air doors of the two low temperature zones are turned on for refrigeration, if the actual temperature of the high temperature zone is lower than the set temperature by 2℃, the heating compensation element of the high temperature zone is turned on until the high temperature zone reaches the set temperature, the air door and the heating compensation element of the high temperature zone are turned off, and when it is detected that the three temperature zones reach the temperature, the compressor is stopped, and all the air doors are turned off.

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