Fan structure and air fryer

Abstract

The utility model discloses a fan structure and an air fryer, and the fan structure comprises a centrifugal fan which comprises an air inlet and an air supply outlet, and the side wall of the centrifugal fan is provided with an assembling part for assembling; the interior of the fan connector is hollow to form an air duct, the air duct comprises an air inlet and an air outlet, the air inlet is communicated with the air supply outlet, the air duct between the air inlet and the air outlet is provided with an arc-shaped airflow cavity, the arc-shaped airflow cavity is used for enabling air from the air inlet to the air outlet to generate centripetal force, and the air outlet is located at the circle center of the arc-shaped airflow cavity. The arc-shaped air flow cavity is arranged, so that air from the air inlet to the air outlet generates centripetal force, the guidance quality and the flow speed of the air flow are enhanced, and the aim of improving the air inlet efficiency on the premise of not increasing too much longitudinal space is achieved. The centrifugal fan is directly connected with the fan connector, so that the assembly process is simplified. And the assembling part can be conveniently, quickly and accurately assembled with other parts, so that the production cost is reduced, and meanwhile, subsequent maintenance and repair are also facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to fan technical field especially, relate to a fan structure and air fryer. BACKGROUND

[0002] Air fryer as a kind of modern cooking equipment, through motor drive centrifugal fan blade high-speed rotation, form high-speed airflow in basket cavity, and the heat generated by heat generating component is brought into basket, so that food is heated uniformly without additional oil and reaches cooking effect. However, the heating efficiency of air fryer is largely dependent on the performance of fan part, especially the level of air inlet efficiency.

[0003] Prior art (such as CN209090943U) proposes an air fryer design aimed at improving air inlet efficiency, its characteristics are that fan blade is inclined to vertical direction, and a conical shell is arranged above fan. The conical shell has upper port and lower port, when motor drives fan to rotate, cold air is sucked into upper shell from air inlet, then flows into the upper port of conical shell, under the guidance of conical shell, cold air is pressed down to the lower port of conical shell, so as to improve the flow rate of air and promote the rapid air inlet at air inlet.

[0004] Although this design improves air inlet efficiency to some extent, it has several significant problems. First, the conical shell is set on the outside of fan, which leads to the need for more space in longitudinal direction to accommodate this structure, which is not conducive to the compactness and miniaturization design of equipment. Secondly, the addition of conical shell increases the assembly complexity of air fryer, improves production cost, and may also bring inconvenience to subsequent maintenance and repair. UTILITY MODEL CONTENTS

[0005] In order to overcome at least one of the defects of the prior art described above, the utility model provides a fan structure and air fryer. The longitudinal space occupation problem can be solved, and the air volume demand can be met.

[0006] The technical scheme adopted by the utility model to solve the problem is:

[0007] A fan structure, comprising: centrifugal fan, the centrifugal fan includes air inlet and air outlet, the side wall of the centrifugal fan is provided with assembly part for assembly;Fan joint, the fan joint is hollow in the inside to form air duct, the air duct includes air inlet and air outlet, the air inlet is communicated with the air outlet, the air duct between the air inlet and the air outlet is provided with arc airflow cavity, the arc airflow cavity is used to make the air from air inlet to air outlet produce centripetal force, and the air outlet is located at the center of the arc airflow cavity.

[0008] By adopting the above scheme, by optimizing the design of the air duct, an arc-shaped air flow cavity is arranged, so that the air from the air inlet to the air outlet generates a centripetal force, thereby enhancing the guiding property and flow rate of the air flow; by directly connecting the centrifugal fan and the fan joint, the assembly process is simplified. The side wall of the centrifugal fan is provided with an assembly part, which facilitates quick and accurate assembly with other components, reduces production cost, and is also convenient for subsequent maintenance and repair; by optimizing the design of the air duct, the goal of improving the air inlet efficiency without increasing too much longitudinal space is achieved.

[0009] Further, the centrifugal fan is provided with at least one, the number of air inlets of the fan joint is consistent with the number of centrifugal fans.

[0010] By adopting the above scheme, not only the air inlet efficiency and air volume are improved, but also the air flow distribution is optimized, the system reliability and redundancy are enhanced, the expansion and upgrading are facilitated, and the compactness and beauty of the structure are maintained.

[0011] Further, the number of air inlets of the fan joint and the number of centrifugal fans are more than two, the centrifugal fans are arranged along the circumference of the arc-shaped air flow cavity, and every two parallel air inlets are arranged staggered.

[0012] By adopting the above scheme, the staggered arrangement of the air inlets not only enhances the air flow uniformity and mixing effect, improves the air inlet efficiency and air volume, optimizes the noise control, but also reduces the noise superposition effect.

[0013] Further, the air inlets are arranged clockwise or counterclockwise along the tangent direction of the arc-shaped air flow cavity.

[0014] By adopting the above scheme, the air flow entering the air duct can flow more smoothly along the arc-shaped cavity. This design utilizes the tangent velocity principle in fluid mechanics, so that the air flow can naturally generate a centripetal force when entering the arc-shaped air flow cavity, which helps to enhance the guiding property and stability of the air flow. When the air flow enters the arc-shaped air flow cavity in the tangent direction, it forms a rotating air flow field in the cavity. This rotating air flow field not only increases the speed of the air flow, but also increases the pressure of the air flow on the inner wall of the arc-shaped cavity, thereby enhancing the impact force and penetration of the air flow. By optimizing the arrangement direction of the air inlets, the resistance loss and energy loss of the air flow when entering the air duct can be reduced. This design enables the air flow to make more efficient use of the power generated by the fan, reducing energy consumption and improving overall efficiency.

[0015] Further, the centrifugal fans around the arc-shaped air flow cavity are arranged at equal intervals.

[0016] By adopting the above scheme, it is ensured that the air flow is more uniformly distributed in the arc-shaped air flow cavity, which can balance the air flow and noise generated by each fan, reduce the fluctuations and instability factors in the system.

[0017] Further, one of the air inlet and the air outlet is provided with a slot, and the other is provided with a plug, the plug is inserted into the slot to make the air inlet and the air outlet in sealed communication.

[0018] By adopting the above scheme, the tight fit of the plug and the slot can effectively prevent air leakage and ensure the sealing between the air inlet and the air outlet; the connection is simpler and faster. Without additional fasteners or sealing materials, the connection can be completed by simply inserting the plug into the slot, greatly reducing the assembly difficulty and cost.

[0019] Further, the assembly part is an outwardly convex threaded column or an inwardly recessed threaded column slot, and the axial direction of the assembly part is consistent with the axial direction of the centrifugal fan.

[0020] By adopting the above scheme, the connection of the centrifugal fan with the fan joint or other components becomes simple and direct, and reliable mechanical locking force can be provided to ensure that the centrifugal fan will not loosen due to vibration or external force during operation.

[0021] Further, the side wall of the centrifugal fan is provided with at least two assembly parts.

[0022] By adopting the above scheme, it is helpful to reduce loosening or damage caused by vibration or external force and improve the overall stability and durability of the equipment.

[0023] Further, the air inlet and the air outlet are opposite in direction, and the air outlet is provided with an air outlet lip plate.

[0024] By adopting the above scheme, the opposite direction can ensure that the airflow flows along a clear and efficient path under the action of the centrifugal fan, which helps to reduce the vortex and turbulence of the airflow in the air duct, improve the stability and efficiency of the airflow, and the air outlet lip plate has a specific shape and angle, which can make the airflow more concentrated and powerful when leaving the air outlet, and can also cooperate with other accessories to play a sealing role and reduce air leakage at the air outlet.

[0025] An air fryer includes a housing body, a top cover, a mounting rack, a heating cavity, and a fan structure, the mounting rack is assembled above the housing body, the top cover is arranged above the mounting rack, the heating cavity is arranged between the housing body and the mounting rack, the assembly part of the centrifugal fan is connected with the top cover, the air outlet of the fan joint is in communication with the heating cavity, and one side of the mounting rack is provided with an air inlet, the air inlet is in communication with the air inlet.

[0026] By adopting the above scheme, the cold air can enter the fan structure smoothly, form hot air after heating, and then be sent into the heating cavity. The circulation process ensures that the temperature inside the air fryer can be kept stable, improves the consistency and quality of cooking, and ensures sufficient air intake.

[0027] In summary, the fan structure and the air fryer provided by the utility model have the following technical effects:

[0028] 1. By setting an arc-shaped airflow cavity inside the fan joint, the wind entering from the air inlet generates a centripetal force when passing through the arc-shaped airflow cavity, thereby enhancing the guidance and flow rate of the airflow. This design helps to quickly introduce more cold air into the heating area of the air fryer, improving the overall heating efficiency;

[0029] 2. Compared with the traditional design of using a conical shell to improve air intake efficiency, the fan structure of the utility model optimizes the air duct design to achieve the goal of improving air intake efficiency without increasing too much longitudinal space. This is conducive to the compactness and miniaturization design of the equipment, making the air fryer more portable and easier to store;

[0030] 3. The side wall of the centrifugal fan is provided with an assembly part, which facilitates quick and accurate assembly with other components. This design not only reduces production costs, but also improves assembly efficiency, which is conducive to mass production and rapid delivery;

[0031] 4. The fan structure helps to reduce airflow vortex and turbulence in the air duct, thereby reducing vibration and noise during equipment operation. This helps to improve the reliability and stability of the equipment and prolong the service life of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a fan assembly structure schematic diagram of the utility model embodiment;

[0033] Figure 2 is a fan explosion structure schematic diagram of the utility model embodiment;

[0034] Figure 3 is a fan bottom structure schematic diagram of the utility model embodiment;

[0035] Figure 4 is an air fryer structure schematic diagram of the utility model embodiment;

[0036] Figure 5 is an air fryer explosion structure schematic diagram of the utility model embodiment.

[0037] Wherein, the reference mark meaning as follows: 1, centrifugal fan;11, air inlet;12, air outlet;121, plug;13, assembly part;2, fan joint;21, air duct;22, air inlet;221, slot;23, air outlet;24, arc airflow cavity;25, air outlet lip plate;3, shell main body;4, top cover;5, mounting frame;51, air inlet;6, heating cavity. DETAILED DESCRIPTION

[0038] For better understanding and implementation, the following will be combined with the drawings of the present application, the technical scheme in the embodiment of the present application is clearly and completely described and discussed, obviously, only part of the examples described here, not all examples, based on the examples in the present application, all other examples obtained by the person skilled in the art without doing creative work, belong to the protection scope of the present application.

[0039] In order to facilitate the understanding of the embodiments of the present application, the following will be combined with the drawings to further explain and describe the specific embodiments, and each embodiment does not constitute a limitation on the embodiments of the present application.

[0040] In the description of the present application, it should be pointed out that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element must have a specific orientation, structure and operation, therefore it cannot be understood as a limitation on the present application.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as understood by those skilled in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments, and are not intended to limit the present application.

[0042] Embodiment 1 of the present application refers to Figures 1-5As shown, a fan structure is disclosed, comprising a centrifugal fan 1 and a fan joint 2, the centrifugal fan 1 comprising an air inlet 11 and an air outlet 12, the side wall of the centrifugal fan 1 is provided with an assembly part 13 for assembly, the fan joint 2 is internally hollow to form an air duct 21, the air duct 21 comprises an air inlet 22 and an air outlet 23, the air inlet 22 is communicated with the air outlet 12, the air duct 21 between the air inlet 22 and the air outlet 23 is provided with an arc-shaped airflow cavity 24, the arc-shaped airflow cavity 24 is used to generate centripetal force for the air from the air inlet 22 to the air outlet 23, the air outlet 23 is located at the center of the arc-shaped airflow cavity 24, by optimizing the design of the air duct 21, the arc-shaped airflow cavity 24 is arranged to generate centripetal force for the air from the air inlet 22 to the air outlet 23, thereby enhancing the guiding property and flow rate of the air flow; by directly connecting the centrifugal fan 1 and the fan joint 2, the assembly process is simplified. The side wall of the centrifugal fan 1 is provided with the assembly part 13, which facilitates quick and accurate assembly with other components, reduces production cost, and is also convenient for subsequent maintenance and repair; by optimizing the design of the air duct 21, the goal of improving the air inlet efficiency without increasing too much longitudinal space is achieved.

[0043] In some embodiments, the centrifugal fan 1 is provided with at least one, the number of air inlets 22 of the fan joint 2 is consistent with the number of centrifugal fans 1. When the number of air inlets 22 of the fan joint 2 and the number of centrifugal fans 1 is one, the arc-shaped airflow cavity 24 of the fan joint 2 is circular, the air inlet 22 extends outwardly along the tangent direction of the arc-shaped airflow cavity 24 and is communicated with the air outlet 12 of the centrifugal fan 1, so that the fan joint 2 as a whole is whistle-shaped, when the centrifugal fan 1 works, the air can enter the air duct 21 through the curved air inlet 22, rotate along the arc-shaped inner wall of the air duct 21 and then be discharged from the air outlet 23 below, by air flow rotation, the air inlet efficiency, air volume and noise control are optimized, and noise superposition effect is reduced.

[0044] When the number of air inlets 22 of the fan joint 2 and the number of centrifugal fans 1 is more than two, the centrifugal fans 1 are arranged along the circumference of the arc-shaped airflow cavity 24, and every two parallel air inlets 22 are arranged in a staggered manner, the staggered arrangement of the air inlets 22 not only enhances the air flow uniformity and mixing effect, improves the air inlet efficiency and air volume, optimizes the noise control, but also reduces the noise superposition effect. Thus, a structure similar to a windmill can be formed. In this embodiment 1, the number of air inlets 22 of the fan joint 2 and the number of centrifugal fans 1 is two, the two air inlets 22 respectively extend outwardly along the tangent direction of the circular arc-shaped airflow cavity 24, so that the fan joint 2 as a whole is S-shaped, when the centrifugal fan 1 works, the air can enter the air duct 21 through the two curved air inlets 22, rotate synchronously along the arc-shaped inner wall of the air duct 21 and then be discharged from the air outlet 23 below.

[0045] Optionally, the air inlet 22 is arranged clockwise or counterclockwise along the tangent direction of the arc-shaped airflow cavity 24, which can make the airflow entering the air duct 21 flow more smoothly along the arc-shaped cavity. This design utilizes the tangent velocity principle in fluid mechanics, so that the airflow can naturally generate centripetal force when entering the arc-shaped airflow cavity 24, which helps to enhance the guidance and stability of the airflow. When the airflow enters the arc-shaped airflow cavity 24 in the tangential direction, it will form a rotating airflow field in the cavity. This rotating airflow field not only increases the speed of the airflow, but also increases the pressure of the airflow on the inner wall of the arc-shaped cavity, thereby enhancing the impact force and penetration of the airflow. By optimizing the arrangement direction of the air inlet 22, the resistance loss and energy loss of the airflow when entering the air duct 21 can be reduced. This design makes the airflow more efficiently utilize the power generated by the fan, reduces energy consumption and improves overall efficiency.

[0046] Preferably, the centrifugal fans 1 are arranged at equal intervals around the arc-shaped airflow cavity 24 to ensure more uniform distribution of airflow in the arc-shaped airflow cavity 24, which can balance the airflow and noise generated by each fan and reduce internal fluctuations and instability factors.

[0047] In some embodiments, one of the air inlet 22 and the air outlet 12 is provided with a slot 221, and the other is provided with a plug 121. The plug 121 is inserted into the slot 221 to seal the communication between the air inlet 22 and the air outlet 12. The tight fit of the plug 121 and the slot 221 can effectively prevent airflow leakage and ensure the sealing between the air inlet 22 and the air outlet 12. The connection is simple and fast without the need for additional fasteners or sealing materials. The plug 121 can be connected by simply inserting it into the slot 221, greatly reducing the assembly difficulty and cost. In this embodiment 1, the air inlet 22 is provided with a ring of slots 221, and the air outlet is provided with a plug 121 that matches the slots 221.

[0048] In some embodiments, the assembly part 13 is an outwardly convex threaded column or an inwardly recessed threaded column. The axial direction of the air outlet 12 is consistent with the axial direction of the centrifugal fan 1, making the connection of the centrifugal fan 1 with the fan joint 2 or other components simple and direct. It can provide reliable mechanical locking force to ensure that the centrifugal fan 1 will not loosen during operation due to vibration or external force. In this embodiment 1, the assembly part 13 is an outwardly convex threaded column, which is fixed by a screw passing through the threaded column. Optionally, the side wall of the centrifugal fan 1 is provided with at least two assembly parts 13, preferably two in this embodiment 1, which are evenly distributed on both sides of the centrifugal fan 1. This helps to reduce loosening or damage caused by vibration or external force, and improves the overall stability and durability of the equipment.

[0049] In some embodiments, the air inlet 11 and the air outlet 23 are oppositely oriented, and the air outlet 23 is provided with an air outlet lip 25. The opposite orientation can ensure that the airflow flows along a clear and efficient path under the action of the centrifugal fan 1, which helps to reduce the vortex and turbulence of the airflow in the air duct 21, improve the stability and efficiency of the airflow, and the air outlet lip 25 has a specific shape and angle, which can make the airflow more concentrated and powerful when leaving the air outlet 23, while also sealing with other accessories to reduce air leakage at the air outlet 23.

[0050] The utility model also relates to an air fryer, including shell main part 3, top cap 4, mounting bracket 5, heating cavity 6 and a fan structure, mounting bracket 5 is assembled in shell main part 3 top, top cap 4 covers and sets up mounting bracket 5 top, heating cavity 6 is located between shell main part 3 with mounting bracket 5, the assembly part 13 of centrifugal fan 1 is connected with top cap 4, the air outlet 23 of fan connector 2 is linked with heating cavity 6, the side of mounting bracket 5 is provided with air inlet 51, air inlet 51 is linked with air inlet 11. Make cold air can enter fan structure smoothly, form hot air after heating, send into heating cavity 6 again. The circulation process ensures that the temperature inside the air fryer can remain stable, improves the consistency and quality of cooking, and at the same time ensures sufficient air intake. Because the airflow distribution is more uniform, the heat inside the air fryer can also be more evenly distributed. This helps to ensure that all parts of the food can be evenly heated, improving the cooking quality and taste. At the same time, uniform airflow can also speed up the heat transfer speed and improve the heating efficiency of the air fryer.

[0051] In summary, the fan structure and air fryer provided by the utility model have the following technical effects:

[0052] 1. By setting the arc-shaped airflow cavity 24 inside the fan connector 2, the wind entering from the air inlet 22 generates a centripetal force when passing through the arc-shaped airflow cavity 24, thereby enhancing the directivity and flow rate of the wind flow. This design helps to quickly introduce more cold air into the heating area of the air fryer, improving the overall heating efficiency;

[0053] 2. Compared with the traditional design of using a conical shell to improve air intake efficiency, the fan structure of the utility model optimizes the air duct 21 design to achieve the goal of improving air intake efficiency without increasing too much longitudinal space. This is conducive to the compactness and miniaturization design of the equipment, making the air fryer more portable and easier to store;

[0054] 3. The side wall of the centrifugal fan 1 is provided with a mounting part 13, which facilitates quick and accurate assembly with other components. This design not only reduces production costs, but also improves assembly efficiency, helping to achieve mass production and fast delivery;

[0055] 4. The fan structure helps to reduce the vortex and turbulence of air flow in the air duct 21, thereby reducing the vibration and noise of the equipment during operation. This helps to improve the reliability and stability of the equipment and prolong the service life of the equipment.

[0056] The technical means disclosed in the utility model scheme are not limited to the technical means disclosed in the above-mentioned embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that for ordinary skilled persons in the art, without departing from the principles of the utility model, a number of improvements and refinements can be made, and these improvements and refinements are also considered within the protection scope of the utility model.

Claims

1. A fan structure, characterized by comprising: The centrifugal fan (1) includes an air inlet (11) and an air outlet (12), and the side wall of the centrifugal fan (1) is provided with an assembly part (13) for assembly. The fan connector (2) is internally hollow to form an air duct (21), and the air duct (21) includes an air inlet (22) and an air outlet (23). The air inlet (22) is in communication with the air outlet (12), and the air duct (21) between the air inlet (22) and the air outlet (23) is provided with an arc-shaped airflow cavity (24) for generating centripetal force of the air from the air inlet (22) to the air outlet (23). The air outlet (23) is located at the center of the arc-shaped airflow cavity (24). The centrifugal fan (1) is provided with at least one air inlet (22) of the fan connector (2), and the number of the air inlets (22) of the fan connector (2) is consistent with the number of the centrifugal fans (1).

2. The fan structure according to claim 1, wherein The number of the air inlets (22) of the fan connector (2) and the number of the centrifugal fans (1) are more than two, the centrifugal fans (1) are arranged along the circumference of the arc-shaped airflow cavity (24), and every two parallel air inlets (22) are arranged in a staggered manner.

3. The fan structure of claim 2, wherein The air inlets (22) are arranged in a clockwise or counterclockwise direction along the tangent direction of the arc-shaped airflow cavity (24).

4. The fan structure according to claim 3, wherein The centrifugal fans (1) are arranged at equal intervals along the circumference of the arc-shaped airflow cavity (24).

5. A fan structure according to claim 3 or 4, wherein One of the air inlets (22) and the air outlet (12) is provided with a slot (221), and the other is provided with a plug (121). The plug (121) is inserted into the slot (221) to realize sealed communication between the air inlet (22) and the air outlet (12).

6. The fan structure of claim 1, wherein The assembly part (13) is an outwardly convex threaded column or an inwardly recessed threaded column groove, and the axial direction of the assembly part (13) is consistent with the axial direction of the centrifugal fan (1).

7. The fan structure of claim 1, wherein The side wall of the centrifugal fan (1) is provided with at least two assembly parts (13).

8. The fan structure of claim 7, wherein The air outlet (23) is provided with an air outlet lip plate (25).

9. The fan structure of claim 1, wherein The fan structure includes a shell body (3), a top cover (4), a mounting rack (5), a heating cavity (6), and the fan structure of any one of claims 1-9. The mounting rack (5) is assembled above the shell body (3), the top cover (4) is arranged above the mounting rack (5), the heating cavity (6) is arranged between the shell body (3) and the mounting rack (5), the assembly part (13) of the centrifugal fan (1) is connected with the top cover (4), the air outlet (23) of the fan connector (2) is in communication with the heating cavity (6), and one side of the mounting rack (5) is provided with an air inlet (51). The air inlet (51) is in communication with the air inlet (11).

10. An air fryer characterized in that, ​

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