Novel function spoiler fan

Abstract

The utility model belongs to refrigerator refrigerating system technical field discloses a new function turbulence fan, including air duct, centrifugal fan, axial flow fan and evaporimeter, the centrifugal fan sets up inside air cavity of air duct, the axial flow fan sets up outside air inlet of air duct through support and with the attitude of impeller axis perpendicular to horizontal plane, the system of turbulence fan is configured as: when the refrigerator normal refrigeration work, control centrifugal fan operation and axial flow fan stop, make airflow inhale from air inlet of air duct and discharge through air outlet of air duct, the utility model passes through installing support formula axial flow fan at air inlet of air duct, has realized the intelligent switching of refrigerator working mode, the axial flow fan has constructed the air curtain of the barrier hot airflow at air inlet of air duct, has solved the problem that the warm current invades the box in the defrosting process successfully, makes the refrigerator in defrosting process the temperature of the inner tank of box keeps stable, need not additional refrigeration to offset the influence of warm current, has reduced the overall energy consumption of refrigerator.

Description

Technical Field

[0001] This utility model relates to the field of refrigerator refrigeration system technology, and in particular to a novel functional turbulence fan. Background Technology

[0002] In existing refrigerator refrigeration systems, the air duct typically uses a single centrifugal fan for airflow circulation. When the refrigerator enters defrost mode, the centrifugal fan stops, and the hot air generated by the heating element on the evaporator is directly transferred to the inner liner through the air inlet. This causes the cold air inside the liner to be invaded by warm, humid air, causing its temperature to rise. To maintain a constant temperature and preservation effect, the refrigerator needs to continuously cool to counteract the effects of the warm air. This frequent cooling not only accelerates the mechanical aging of the evaporator and fan, shortening the equipment's lifespan, but also significantly increases the refrigerator's energy consumption and reduces its energy efficiency ratio. Furthermore, existing technology lacks an effective design to block the warm, humid air during defrosting, resulting in the refrigerator taking longer to return to the set temperature after defrosting, affecting the preservation effect and user experience. Utility Model Content

[0003] The main objective of this invention is to provide a novel turbulence fan to address the issue of hot air from the evaporator being directly transferred to the inner liner of the refrigerator through the air inlet when the centrifugal fan stops during defrosting mode. This causes the cold air inside the liner to be intruded by warm, humid air, resulting in a temperature rise. To maintain a constant temperature and preservation effect, the refrigerator needs to continuously operate in cooling mode to counteract the effects of the warm air. This frequent cooling not only accelerates the mechanical aging of the evaporator and fan, shortening the equipment's lifespan, but also significantly increases the refrigerator's energy consumption and reduces its energy efficiency ratio.

[0004] In order to achieve the above-mentioned utility model objectives, the first aspect of this utility model proposes a new functional turbulence fan, including an air duct, a centrifugal fan, an axial fan, and an evaporator; The centrifugal fan is installed in the internal air cavity of the air duct; The axial flow fan is mounted outside the air inlet of the air duct via a bracket and with the impeller axis perpendicular to the horizontal plane. The system of the turbulence fan is configured to: when the refrigerator is working normally, control the centrifugal fan to run while the axial fan stops, so that the airflow is drawn in from the air inlet of the air duct and discharged through the air outlet of the air duct. During evaporator defrosting, the centrifugal fan is stopped while the axial fan operates at a low speed, creating a reverse airflow from the direction of the inner chamber of the casing towards the evaporator.

[0005] Furthermore, the reverse airflow generated by the axial flow fan during defrosting creates an air curtain at the air inlet of the air duct that blocks the entry of hot airflow.

[0006] Furthermore, the axial flow fan is fastened to the air inlet of the air duct by screws, and the axial flow fan is a bracket-type axial flow fan.

[0007] Furthermore, the centrifugal fan is fastened inside the cavity of the air duct by screws, and is used to drive the airflow from the air inlet of the air duct to the air outlet of the air duct by rotation during normal cooling.

[0008] Furthermore, the air duct and evaporator are fixed to the back panel of the refrigerator, and the inner wall of the air duct is provided with multiple arc-shaped guide ribs; The multiple arc-shaped guide ribs extend along the airflow direction within the duct, and their curvature is configured to comb and equalize the airflow from the centrifugal fan, and guide the airflow to the corresponding air outlet.

[0009] Furthermore, the air inlet of the air duct is connected to the inner liner of the box, and the axial flow fan operates during defrosting to maintain a constant temperature of the inner liner of the box by blocking the warm airflow.

[0010] Furthermore, it also includes a control unit configured to: receive a defrosting start signal from a temperature sensor, and accordingly first execute a command to stop the centrifugal fan, and then start the axial fan after a first time delay; receive a defrosting end signal, and accordingly first execute a command to stop the axial fan, and then start the centrifugal fan after a second time delay; The first time period T1 is 1-3 seconds, and the second time period T2 is 1-3 minutes.

[0011] Furthermore, a sealing ring is provided between the support of the axial flow fan and the outer edge of the air inlet of the air duct, and the impeller diameter of the axial flow fan is greater than or equal to the diameter of the air inlet of the air duct.

[0012] Furthermore, the low speed of the axial flow fan during defrosting is controlled within the range of 20% to 40% of its rated speed.

[0013] Furthermore, the system's control method is based on the automatic switching of the refrigerator's working mode. In normal cooling mode, the centrifugal fan is activated first, and in defrosting mode, the axial fan is activated first, in order to reduce energy consumption and extend the working life of the evaporator and the fan.

[0014] Beneficial effects: This invention features a novel turbulence-disrupting fan. By installing a bracket-type axial flow fan at the air inlet of the duct, it achieves intelligent switching of the refrigerator's operating modes: during normal cooling, the axial flow fan stops, and the centrifugal fan operates; during evaporator defrosting, the centrifugal fan stops, and the axial flow fan rotates in the opposite direction at a low speed, forming an airflow from the direction of the inner liner towards the evaporator, effectively preventing warm and humid air from entering the refrigerator. Through this design, the axial flow fan creates an air curtain at the air inlet of the duct, successfully solving the problem of warm air intrusion into the refrigerator during defrosting. This technology keeps the temperature of the inner liner of the refrigerator stable during defrosting, eliminating the need for additional cooling to counteract the warm air's influence, thereby extending the service life of the evaporator and fan, and reducing the overall energy consumption of the refrigerator. Simultaneously, the two fans do not operate simultaneously, ensuring the stability and efficiency of the airflow during normal cooling and avoiding interference with the normal cooling effect. This invention effectively improves the refrigerator's preservation effect and energy efficiency ratio, providing users with a more stable and energy-saving user experience, while reducing the frequency of refrigerator maintenance and long-term operating costs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a novel functional turbulence fan according to an embodiment of the present invention; Figure 2 This is a structural schematic diagram of a novel functional turbulence fan according to an embodiment of the present invention from another perspective; Figure 3 This is a system control schematic diagram of a novel functional turbulence fan according to an embodiment of the present invention.

[0016] in: 1-Air duct; 11-Air duct inlet; 2-Centrifugal fan; 3-Axial fan; 4-Evaporator; 5-Inner chamber of the enclosure.

[0017] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0018] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0019] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly and specifically defined.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] Reference Figures 1-3 One embodiment of this utility model provides a novel turbulence fan, including a duct 1, a centrifugal fan 2, an axial fan 3, and an evaporator 4; The centrifugal fan 2 is disposed in the internal air cavity of the air duct 1; The axial flow fan 3 is mounted outside the air inlet 11 of the air duct via a bracket and with the impeller axis perpendicular to the horizontal plane; The system of the turbulence fan is configured such that when the refrigerator is working normally, the centrifugal fan 2 is controlled to run while the axial fan 3 is stopped, so that the airflow is drawn in from the air inlet 11 of the air duct and discharged through the air outlet of the air duct. During defrosting of evaporator 4, centrifugal fan 2 is stopped while axial fan 3 operates at low speed, forming a reverse airflow from the direction of inner chamber 5 towards evaporator 4.

[0023] In this embodiment, one end of the air duct 1 is the air inlet 11, and the other end is the air outlet. An air cavity is formed inside the air duct 1. The centrifugal fan 2 is fastened to the cavity inside the air duct 1 with screws. The specific installation position is located in the middle area of ​​the air duct 1, ensuring that it can effectively drive the airflow from the air inlet 11 and out of the air outlet during normal cooling operation.

[0024] An axial flow fan 3 is mounted on the outside of the air inlet 11 of the duct via a bracket, with its impeller axis perpendicular to the horizontal plane. The axial flow fan 3 is secured to the opening of the air inlet 11 with screws, and it is a bracket-mounted axial flow fan. A sealing ring is provided between the bracket of the axial flow fan 3 and the outer edge of the air inlet 11 to ensure airtightness. The impeller diameter of the axial flow fan 3 is greater than or equal to the diameter of the air inlet 11, ensuring that the axial flow fan 3 can effectively form an air curtain during operation.

[0025] The air duct 1 and evaporator 4 are fixed to the back panel of the refrigerator. Multiple arc-shaped guide ribs are provided on the inner wall of the air duct 1. These ribs extend along the airflow direction within the air duct 1, and their curvature is designed to streamline and even out the airflow from the centrifugal fan 2, guiding the airflow to the corresponding air outlet. The arrangement of these guide ribs effectively reduces airflow turbulence within the air duct 1, improving the uniformity and flowability of the airflow.

[0026] The air inlet 11 of the air duct is connected to the inner liner 5 of the box. When the axial fan 3 is running during defrosting, the reverse airflow it generates can effectively block the warm and humid airflow from the inner liner 5 of the box from entering the air duct, thereby maintaining the constant temperature of the inner liner 5 of the box.

[0027] By setting up two fan systems, centrifugal fan 2 and axial fan 3, the airflow direction can be switched between normal cooling and defrosting modes. During normal cooling, centrifugal fan 2 operates to create a forward airflow, effectively improving cooling efficiency. During defrosting, axial fan 3 operates at a low speed to create a reverse airflow, effectively blocking warm and humid air from entering the air duct, thereby maintaining a constant temperature inside the refrigerator liner 5, avoiding temperature fluctuations during defrosting, improving defrosting efficiency, and reducing energy consumption.

[0028] Optionally, the reverse airflow generated by the axial fan 3 during defrosting creates an air curtain at the air inlet 11 of the air duct to block the entry of hot airflow.

[0029] It should be noted that the reverse airflow generated by the axial fan 3 during defrosting creates an air curtain at the air inlet 11 of the air duct to block the entry of hot airflow. This effectively prevents the warm and humid airflow generated during defrosting from entering the air duct, avoids the temperature rise of the inner liner 5 of the refrigerator during the defrosting process, ensures the stability of the internal temperature of the refrigerator, improves defrosting efficiency, and reduces the time required for the refrigerator to reach the set temperature again after defrosting.

[0030] Optionally, the axial flow fan 3 is fastened to the inlet of the air duct 11 by screws, and the axial flow fan 3 is a bracket-type axial flow fan.

[0031] It should be noted that the axial flow fan 3 is fastened to the air inlet 11 of the air duct with screws, and it is a bracket-type axial flow fan. This structural design ensures the stable installation of the axial flow fan 3 and avoids loosening or displacement caused by vibration during operation.

[0032] Optionally, the centrifugal fan 2 is fastened inside the cavity of the air duct 1 by screws, and is used to drive the airflow from the air inlet 11 of the air duct to the air outlet of the air duct during normal cooling.

[0033] It should be noted that the centrifugal fan 2 is fastened to the cavity of the air duct 1 with screws. This installation method ensures that the centrifugal fan 2 can operate stably during normal cooling, effectively driving the airflow to enter from the air inlet 11 of the air duct and exit from the air outlet of the air duct, improving the cooling efficiency, and at the same time avoiding displacement of the fan due to vibration during operation.

[0034] Optionally, the air duct 1 and the evaporator 4 are fixed to the back panel of the refrigerator, and the inner wall of the air duct 1 is provided with multiple arc-shaped guide ribs. The plurality of arc-shaped guide ribs extend along the airflow direction inside the air duct 1, and their curvature is configured to comb and equalize the airflow from the centrifugal fan 2 and guide the airflow to the corresponding air outlet.

[0035] It should be noted that the multiple arc-shaped guide ribs set on the inner wall of the air duct 1 extend along the airflow direction inside the air duct 1. Their curvature is configured to sort and equalize the airflow from the centrifugal fan 2, effectively reducing the turbulence of the airflow inside the air duct 1, improving the uniformity and fluidity of the airflow, thereby improving the cooling efficiency.

[0036] Optionally, the air inlet 11 of the air duct is connected to the inner liner 5 of the box, and the axial flow fan 3 operates during defrosting to maintain a constant temperature of the inner liner 5 of the box by blocking the warm airflow.

[0037] It should be noted that the air inlet 11 of the air duct is connected to the inner liner 5 of the refrigerator. The axial fan 3 operates during defrosting to maintain a constant temperature of the inner liner 5 by blocking the warm airflow. This design effectively prevents the temperature of the inner liner 5 from rising during the defrosting process, thus ensuring the cooling effect inside the refrigerator.

[0038] Optionally, a control unit is also included, which is configured to: receive a defrosting start signal from a temperature sensor and, accordingly, first execute an instruction to stop the centrifugal fan 2, and then start the axial fan 3 after a first time delay; receive a defrosting end signal and, accordingly, first execute an instruction to stop the axial fan 3, and then start the centrifugal fan 2 after a second time delay. The first time period T1 is 1-3 seconds, and the second time period T2 is 1-3 minutes.

[0039] It should be noted that the control unit is electrically connected to centrifugal fan 2 and axial fan 3, and also connected to a temperature sensor located near the evaporator 4 to receive temperature signals and control the start and stop of both. The control unit is configured as follows: when the temperature sensor detects that the evaporator surface temperature has reached the defrost start threshold, the control unit receives the defrost start signal from the temperature sensor and, based on this, first executes the command to stop centrifugal fan 2, and then starts axial fan 3 after a first time period T11-3 seconds; when the temperature sensor detects that the evaporator surface temperature has reached the defrost end threshold, the control unit receives the defrost end signal and, based on this, first executes the command to stop axial fan 3, and then starts centrifugal fan 2 after a second time period T21-3 minutes. The low speed of axial fan 3 during defrosting is controlled within 20% to 40% of its rated speed, which can form an effective air curtain while reducing energy consumption and noise. The control unit is designed to achieve precise control of fan switching. By designing delay times T11-3 seconds and T21-3 minutes, the smoothness of the fan switching process is ensured, the impact of sudden airflow changes on the system is avoided, the stability and reliability of the system are improved, and energy consumption is reduced.

[0040] Optionally, a sealing ring is provided between the bracket of the axial flow fan 3 and the outer edge of the air inlet 11 of the air duct, and the impeller diameter of the axial flow fan 3 is greater than or equal to the diameter of the air inlet 11 of the air duct.

[0041] It should be noted that a sealing ring is provided between the bracket of the axial flow fan 3 and the outer edge of the air inlet 11 of the air duct, and the impeller diameter of the axial flow fan 3 is greater than or equal to the diameter of the air inlet 11 of the air duct. This design ensures that the axial flow fan 3 can form an effective air curtain when it is running, effectively blocking the warm and humid airflow from entering the air duct and improving the blocking effect of the air curtain. At the same time, the setting of the sealing ring further enhances the airtightness of the system.

[0042] Optionally, the low speed of the axial flow fan 3 during defrosting is controlled within the range of 20% to 40% of its rated speed.

[0043] It should be noted that the axial fan 3 is controlled at a low speed of 20% to 40% of its rated speed during defrosting. This speed control ensures the formation of the air curtain while effectively reducing energy consumption and operating noise, achieving a balance between energy saving and functionality.

[0044] Optionally, the system's control method is based on the automatic switching of the refrigerator's working mode. In normal cooling mode, centrifugal fan 2 is activated first, and in defrosting mode, axial fan 3 is activated first, in order to reduce energy consumption and extend the working life of evaporator 4 and fan.

[0045] It should be noted that the system's control method is based on the automatic switching of the refrigerator's working mode. In normal cooling mode, centrifugal fan 2 is activated first, and in defrosting mode, axial fan 3 is activated first. This intelligent control method not only reduces system energy consumption, but also extends the working life of evaporator 4 and fans, improving the overall operating efficiency and service life of the refrigerator.

[0046] Explanation: When the refrigerator is working normally, the control unit starts the centrifugal fan 2 and stops the axial fan 3, so that the airflow is drawn in from the air inlet 11 and discharged through the air outlet. The centrifugal fan 2 drives the airflow to form a uniform cooling airflow in the air duct 1. After being sorted and evenly distributed by multiple arc-shaped guide ribs on the inner wall of the air duct, it is guided to the air outlet to achieve efficient cooling. When the temperature sensor detects that the surface temperature of the evaporator has reached the defrosting condition, the control unit receives the defrosting start signal and first executes the instruction to stop the centrifugal fan 2. Then, after a delay of 1-3 seconds, the axial fan 3 is started to run at a low speed of 20%-40% of the rated speed, forming a reverse airflow from the direction of the inner liner 5 of the box to the direction of the evaporator 4. An air curtain is built at the air inlet 11 of the air duct to block the entry of hot airflow, effectively blocking the warm and humid airflow from the inner liner 5 of the box from entering the air duct and maintaining the constant temperature of the inner liner 5 of the box. When the temperature sensor detects that defrosting is complete, the control unit receives the defrosting end signal and first executes the instruction to stop the axial fan 3. Then, after a delay of 1-3 minutes, it starts the centrifugal fan 2, so that the system returns to normal refrigeration operation. Through this intelligent control method, the refrigerator's refrigeration and defrosting processes are seamlessly switched, reducing system energy consumption and extending the service life of the evaporator 4 and the fan.

[0047] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A novel functional turbulence fan, characterized in that, It includes air duct (1), centrifugal fan (2), axial fan (3) and evaporator (4); The centrifugal fan (2) is installed in the internal air cavity of the air duct (1); The axial flow fan (3) is mounted outside the air inlet (11) of the air duct via a bracket and with the impeller axis perpendicular to the horizontal plane; The system of the turbulence fan is configured such that when the refrigerator is working normally, the centrifugal fan (2) is controlled to run while the axial fan (3) stops, so that the airflow is drawn in from the air inlet (11) of the air duct and discharged through the air outlet of the air duct. When the evaporator (4) is defrosting, the centrifugal fan (2) is stopped while the axial fan (3) runs at a low speed, forming a reverse airflow from the direction of the inner liner (5) of the box towards the direction of the evaporator (4).

2. The novel functional turbulence fan according to claim 1, characterized in that, The reverse airflow generated by the axial flow fan (3) during defrosting creates an air curtain at the air inlet (11) of the air duct that blocks the entry of hot airflow.

3. The novel functional turbulence fan according to claim 1, characterized in that, The axial flow fan (3) is fastened to the air inlet (11) of the air duct by screws, and the axial flow fan (3) is a bracket-type axial flow fan.

4. The novel functional turbulence fan according to claim 1, characterized in that, The centrifugal fan (2) is fastened inside the cavity of the air duct (1) by screws, and is used to drive the airflow from the air inlet (11) of the air duct to the air outlet of the air duct during normal cooling.

5. The novel functional turbulence fan according to claim 1, characterized in that, The air duct (1) and the evaporator (4) are fixed to the back panel of the refrigerator, and the inner wall of the air duct (1) is provided with multiple arc-shaped guide ribs; The multiple arc-shaped guide ribs extend along the airflow direction in the air duct (1), and their curvature is configured to comb and equalize the airflow from the centrifugal fan (2) and guide the airflow to the corresponding air outlet.

6. The novel functional turbulence fan according to claim 2, characterized in that, The air inlet (11) of the air duct is connected to the inner liner (5) of the box. The axial flow fan (3) operates during defrosting to maintain the temperature of the inner liner (5) of the box by blocking the warm air.

7. The novel functional turbulence fan according to claim 1, characterized in that, It also includes a control unit configured to: receive a defrost start signal from a temperature sensor and, accordingly, first execute an instruction to stop the centrifugal fan (2), and then start the axial fan (3) after a first time delay; receive a defrost end signal and, accordingly, first execute an instruction to stop the axial fan (3), and then start the centrifugal fan (2) after a second time delay. The first time period T1 is 1-3 seconds, and the second time period T2 is 1-3 minutes.

8. The novel functional turbulence fan according to claim 1, characterized in that, A sealing ring is provided between the support of the axial flow fan (3) and the outer edge of the air inlet (11) of the air duct, and the impeller diameter of the axial flow fan (3) is greater than or equal to the diameter of the air inlet (11) of the air duct.

9. The novel functional turbulence fan according to claim 7, characterized in that, The axial flow fan (3) is controlled at a low speed of 20% to 40% of its rated speed during defrosting.

10. The novel functional turbulence fan according to claim 7, characterized in that, The system's control method is based on the automatic switching of the refrigerator's working mode. In normal cooling mode, the centrifugal fan (2) is started first, and in defrosting mode, the axial fan (3) is started first, in order to reduce energy consumption and extend the working life of the evaporator (4) and the fan.

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