Fan and air fryer

Abstract

The invention relates to a fan and an air fryer, the fan comprises a base body and fan blades, the base body comprises a first base face and a second base face, the first base face and the second base face are sequentially arranged in the radial direction of the base body, an included angle alpha is formed between at least one of the first base face and the second base face and the axis of the base body, wherein alpha is larger than 0 and smaller than 90 degrees, the fan blades comprise a plurality of first blades and a plurality of second blades, the first blades are arranged on the first base face at intervals in the circumferential direction of the base body, and the second blades are arranged on the second base face at intervals in the circumferential direction of the base body. The fan is reasonable in structural design, air loss can be reduced, the air outlet efficiency is high, and the circulation effect of hot air in the cooking cavity can be improved.

Description

Technical Field

[0001] This invention relates to the field of cooking appliance technology, specifically to a fan and an air fryer. Background Technology

[0002] An air fryer is a household appliance that uses high-speed circulating hot air to cook food. It generates hot air through heating elements, and then a fan blows this hot air into the cooking chamber to heat the food. The food's own oils are used to fry it, dehydrating it and causing it to become golden brown and crispy, achieving a frying effect. In related technologies, manufacturers increase the fan diameter to improve airflow, but this method has limited impact on improving the efficiency of hot air circulation. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, this invention proposes a fan with a reasonable structural design that is beneficial to improving the circulation effect of hot air in the cooking cavity.

[0005] This invention also proposes an air fryer.

[0006] The fan of the present invention includes: a base, the base including a first base surface and a second base surface, the first base surface and the second base surface being arranged sequentially along the radial direction of the base, at least one of the first base surface and the second base surface having an included angle α with the axis of the base, wherein 0 < α < 90°; and fan blades, the fan blades including a plurality of first blades and a plurality of second blades, the plurality of first blades being arranged circumferentially on the first base surface, and the plurality of second blades being arranged circumferentially on the second base surface.

[0007] According to the fan of the present invention, since the first base surface and the second base surface are arranged sequentially along the radial direction of the base, a plurality of first blades are arranged at intervals along the circumference of the base on the first base surface, and a plurality of second blades are arranged at intervals along the circumference of the base on the second base surface. Therefore, when the fan rotates, the radial distance between the fan's outlet area and return area can be increased, thereby reducing the probability that airflow discharged from the fan's outlet area will be directly drawn back into the nearby return area, thus reducing wind loss. Since at least one of the first and second base surfaces has an angle α with the axis of the base, the fan's outlet angle can have a certain slope, thereby improving the fan's airflow efficiency. Therefore, the fan of the present invention has a reasonable structural design, can reduce wind loss, and has high airflow efficiency, thus contributing to improved hot air circulation within the cooking cavity.

[0008] Optionally, at least a portion of the first base surface and at least a portion of the second base surface overlap within the radial projection of the substrate. Thus, when the fan rotates, a portion of the airflow can flow outwards radially. Because at least a portion of the first base surface and at least a portion of the second base surface overlap radially, a secondary transmission of airflow can be achieved, increasing the output airflow and air pressure, further improving the food cooking rate and the uniformity of food heating.

[0009] Optionally, at least a portion of the first blade and at least a portion of the second blade overlap within the radial projection of the substrate. Thus, when the fan rotates, a portion of the airflow can flow outwards radially. Because at least a portion of the first blade and at least a portion of the second blade overlap radially, a secondary transmission of airflow can be achieved, increasing the output airflow and air pressure, further improving the food cooking rate and the uniformity of food heating.

[0010] Optionally, the substrate has a first side facing the cooking cavity and a second side facing away from the cooking cavity. Both the first blade and the second blade are arranged facing the first side. The first base surface is located radially outside the second base surface. From the second side to the first side, the first base surface extends obliquely away from the axis of the substrate. An angle α1 is formed between the first base surface and the axis of the substrate, where 0 < α1 < 90°. Because the first base surface is located radially outside the second base surface, and there is an angle α1 between the first base surface and the axis of the substrate, the first base surface of the outer ring of the fan has a certain slope. When the fan rotates, it can tilt and discharge air towards the cooking cavity, further improving the fan's airflow efficiency. Furthermore, because the fan has a certain tilt angle when discharging air, it can reduce local turbulence losses caused by the fan's radial airflow perpendicularly contacting the wall of the cooking cavity, which helps to reduce wind loss.

[0011] Optionally, 30°≤α1≤60°. By adopting the above-mentioned tilt angle range for the first base surface, the fan of the present invention can increase the airflow velocity while increasing the fan's air delivery range, thereby improving the food cooking rate and the uniformity of food heating.

[0012] Optionally, the substrate further includes a third base surface, which is disposed between the first base surface and the second base surface. The third base surface is orthogonal to the axis of the substrate, and the included angle β between the second base surface and the third base surface is 90°≤β≤180°. By setting the third base surface, the fan of the present invention can radially space the first blade and the second blade by a certain distance, which can increase the fan's air delivery range and increase the radial distance between the fan's outlet and return air areas. This reduces the probability that airflow discharged from the fan's outlet area will be directly drawn back into the nearest return air area, thus helping to reduce wind loss.

[0013] Optionally, the fan blades include a plurality of third blades, which are arranged circumferentially spaced along the third base surface. This allows for the generation of more airflow while maintaining a constant fan speed, enabling the delivery of more hot air to the food, thereby improving cooking efficiency and the uniformity of heating.

[0014] Optionally, the substrate has a first side facing the cooking cavity and a second side away from the cooking cavity. Both the first blade and the second blade are arranged facing the first side. The first base surface is located radially outside the second base surface and is orthogonal to the axis of the substrate. In the direction from the second side to the first side, the second base surface extends obliquely towards the axis of the substrate, and there is an angle α2 between the second base surface and the axis of the substrate, where 0 < α2 < 90°. When the fan rotates, the second blade can tilt radially to discharge air, and some airflow can be compressed twice by the first blade before being blown outwards, thus achieving secondary airflow relay to increase the air volume and air pressure.

[0015] Optionally, the substrate further includes a third base surface, which is located radially inside the second base surface and orthogonal to the axis of the substrate. The fan blade includes multiple third blades, which are arranged circumferentially around the third base surface. This allows for the generation of more airflow while maintaining a constant fan speed, enabling the delivery of more hot air to the food, improving cooking efficiency and the uniformity of heating. Furthermore, the arrangement of the third blades shifts the overall negative pressure return air area of ​​the fan closer to the fan axis, reducing the negative pressure value at the fan's edge outlet. This prevents airflow from being directly drawn back into the nearby negative pressure return air area after being exhausted from the fan's outlet, thus reducing wind loss.

[0016] Optionally, the substrate has a first side facing the cooking cavity and a second side facing away from the cooking cavity. Both the first blade and the second blade are arranged facing the first side. The first base surface is located radially outside the second base surface and is parallel to the axis of the substrate. From the second side to the first side, the second base surface extends obliquely towards the axis of the substrate, with an angle α2 between the second base surface and the axis of the substrate, where 0 < α2 < 90°. Because of the angle α2 between the second base surface and the axis of the substrate, the second base surface of the inner ring of the fan has a certain slope. When the fan rotates, the second blade of the inner ring can tilt towards the cooking cavity to discharge air, further improving the fan's airflow efficiency. Furthermore, because the first base surface is located radially outside the second base surface and is parallel to the axis of the substrate, some airflow can be compressed twice by the first blade before being blown outwards, achieving secondary airflow relay to increase the airflow volume and pressure.

[0017] Optionally, the substrate further includes a third base surface, which is disposed between the first base surface and the second base surface. The third base surface is orthogonal to the axis of the substrate, and the fan blade includes multiple third blades arranged circumferentially along the third base surface. This allows for the generation of more airflow while maintaining a constant fan speed, enabling the delivery of more hot air to the food, improving cooking efficiency and the uniformity of heating. Furthermore, the arrangement of the third blades shifts the overall negative pressure return air area of ​​the fan closer to the fan axis, reducing the negative pressure value at the fan's edge outlet. This prevents airflow from being directly drawn back into the nearby negative pressure return air area after being exhausted from the fan's outlet area, thus reducing wind loss.

[0018] Optionally, the first blade is located radially outside the second blade, and the number of the first blade is not less than the number of the second blade. This avoids the problem of airflow attenuation due to multiple transmissions between the inner and outer rings of the fan, reducing airflow loss.

[0019] Optionally, the first blade is orthogonal to the first base plane, and the second blade is orthogonal to the second base plane. This can improve the air delivery effect when the first and second blades rotate, thereby increasing the air volume.

[0020] The air fryer of the present invention includes: a body, wherein a cooking cavity is provided inside the body; a motor, wherein the motor has a drive shaft; a fan, wherein the fan is the fan described in any one of the present invention, the fan is disposed on the upper side of the cooking cavity, and the first blade and the second blade are disposed on the side of the base facing the cooking cavity, and the drive shaft is connected to the base.

[0021] According to the air fryer of the present invention, since the first base surface and the second base surface are arranged sequentially along the radial direction of the base body, a plurality of first blades are arranged at intervals along the circumference of the base body on the first base surface, and a plurality of second blades are arranged at intervals along the circumference of the base body on the second base surface, the radial distance between the fan's exhaust area and return air area can be increased when the fan rotates. This reduces the probability that airflow discharged from the fan's exhaust area will be directly drawn back into the nearby return air area, thus reducing wind loss. Since at least one of the first and second base surfaces has an angle α with the axis of the base body, the fan's exhaust angle can have a certain slope, thereby improving the fan's exhaust efficiency. Therefore, the air fryer of the present invention has a reasonable structural design, which can reduce wind loss and achieve high exhaust efficiency, thereby improving the circulation effect of hot air in the cooking chamber. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the internal flow field of an air fryer according to an embodiment of the present invention.

[0023] Figure 2 This is a side view of a fan according to the first embodiment of the present invention.

[0024] Figure 3 This is an isometric view of a fan according to the first embodiment of the present invention.

[0025] Figure 4 This is a simplified diagram of a fan according to the first embodiment of the present invention.

[0026] Figure 5 This is a simplified diagram of a fan according to a second embodiment of the present invention.

[0027] Figure 6 This is a simplified diagram of a fan according to the third embodiment of the present invention.

[0028] Figure 7 This is a simplified diagram of a fan according to the fourth embodiment of the present invention.

[0029] Figure 8 This is a simplified diagram of a fan according to the fifth embodiment of the present invention.

[0030] Figure 9 This is a simplified diagram of a fan according to the sixth embodiment of the present invention.

[0031] Figure 10 This is a simplified diagram of a fan according to the seventh embodiment of the present invention.

[0032] Figure 11 This is a simplified diagram of a fan according to the eighth embodiment of the present invention.

[0033] Figure 12 This is a simplified diagram of a fan according to the ninth embodiment of the present invention.

[0034] Figure label:

[0035] 1. Fan; 11. Base; 101. First side; 102. Second side; 111. First base surface; 1111. Hole; 112. Second base surface; 113. Third base surface; 12. Fan blade; 121. First blade; 122. Second blade; 123. Third blade;

[0036] 2. Body; 21. Cooking cavity;

[0037] 3. Motor;

[0038] 4. Heating element. Detailed Implementation

[0039] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0040] The following is a reference appendix. Figures 1 to 12 The fan 1 and the air fryer are described according to embodiments of the present invention.

[0041] like Figures 1 to 4 As shown, the fan 1 of this embodiment includes a base 11 and a fan blade 12. The base 11 includes a first base surface 111 and a second base surface 112. The first base surface 111 and the second base surface 112 are arranged sequentially along the radial direction of the base 11. At least one of the first base surface 111 and the second base surface 112 has an angle α with the axis of the base 11, wherein 0 < α < 90°. The fan blade 12 includes a plurality of first blades 121 and a plurality of second blades 122. The plurality of first blades 121 are arranged at intervals along the circumference of the base 11 on the first base surface 111, and the plurality of second blades 122 are arranged at intervals along the circumference of the base 11 on the second base surface 112.

[0042] According to an embodiment of the present invention, the fan 1 has a first base surface 111 and a second base surface 112 arranged radially along the base 11. Multiple first blades 121 are arranged circumferentially on the first base surface 111, and multiple second blades 122 are arranged circumferentially on the second base surface 112. Therefore, when the fan 1 rotates, the radial distance between the air outlet area and the air return area of ​​the fan 1 can be increased, reducing the probability that airflow discharged from the air outlet area of ​​the fan 1 will be directly drawn back into the nearest air return area, thus reducing wind loss. Since at least one of the first base surface 111 and the second base surface 112 has an angle α with the axis of the base 11, the air outlet angle of the fan 1 can have a certain slope, improving the air outlet efficiency of the fan 1 and allowing more hot air to be delivered into the cooking cavity 21. Therefore, the fan 1 of the embodiment of the present invention has a reasonable structural design, which can reduce wind loss and has high air outlet efficiency, thereby improving the circulation effect of hot air in the cooking cavity 21.

[0043] It is understandable that, such as Figure 1 As shown, the air outlet area of ​​fan 1 is located radially outward, and the negative pressure return air area of ​​fan 1 is located radially inward. Because the fan 1 in this embodiment of the invention adopts the above-described structural arrangement, the blades of the inner ring of fan 1 can transfer the overall negative pressure return air area of ​​fan 1 to a region closer to the axis of fan 1, reducing the negative pressure value at the air outlet of the edge region of fan 1. This prevents the airflow from being directly drawn back by the nearby negative pressure return air area after being discharged from the air outlet area of ​​fan 1, thus helping to reduce wind loss.

[0044] like Figures 2 to 4 As shown, since multiple first blades 121 are arranged on the first base surface 111, the first base surface 111 can support the first blades 121. When the fan 1 rotates, the first blades 121 and the first base surface 111 can work together to act on the airflow, so that the airflow flows in a large range within the cooking chamber 21, thereby improving the cooking rate of food and the uniformity of food heating.

[0045] like Figures 2 to 4 As shown, since multiple second blades 122 are arranged on the second base surface 112, the second base surface 112 can support the second blades 122. When the fan 1 rotates, the second blades 122 and the second base surface 112 can work together to act on the airflow, so that the airflow flows in a wide range within the cooking chamber 21, thereby improving the cooking rate of food and the uniformity of food heating.

[0046] It should be noted that the number of blade groups 12 can be two, three, or more. Specifically, when there are two blade groups, the fan blade 12 includes a first blade 121 and a second blade 122, which are arranged radially along the fan 1. When there are three blade groups, the fan blade 12 includes a first blade 121, a second blade 122, and a third blade 123, which are also arranged radially along the fan 1.

[0047] Compared to the solution in related technologies where the fan 1 only has a single set of blades, the number of blades of the fan 1 can be increased, thereby increasing the air volume of the fan 1 while keeping the fan speed constant, thus improving the cooking efficiency of the food and the uniformity of the food when heated.

[0048] Optionally, such as Figure 4 and Figure 5 As shown, within the radial projection of the base 11, at least a portion of the first base surface 111 and at least a portion of the second base surface 112 overlap. In other words, at least a portion of the first base surface 111 and at least a portion of the second base surface 112 are arranged opposite each other in the radial direction of the base 11. That is, at least a portion of the first base surface 111 and at least a portion of the second base surface 112 are at the same horizontal height. When the fan 1 rotates, part of the airflow can flow outward along the radial direction of the fan 1. Since at least a portion of the first base surface 111 and at least a portion of the second base surface 112 are at the same horizontal height, a secondary transmission relay of airflow can be achieved to increase the output air volume and air pressure, further improving the food cooking rate and the uniformity of food heating.

[0049] Optionally, such as Figure 6 As shown, within the radial projection of the base 11, at least a portion of the first blade 121 and at least a portion of the second blade 122 overlap. In other words, at least a portion of the first blade 121 and at least a portion of the second blade 122 are arranged opposite each other in the radial direction of the base 11. That is, at least a portion of the first blade 121 and at least a portion of the second blade 122 are at the same horizontal height. When the fan 1 rotates, part of the airflow can flow outward in the radial direction of the fan 1. Since at least a portion of the first blade 121 and at least a portion of the second blade 122 are at the same horizontal height, a secondary transmission relay of airflow can be achieved to increase the output air volume and air pressure, further improving the food cooking rate and the uniformity of food heating.

[0050] For example, when the fan blade 12 is arranged with multiple sets of blades (e.g., first blade 121, second blade 122 and third blade 123) along the radial direction of the base 11, the multiple sets of blades can realize multiple radial transmission relay of airflow, so as to guide all the airflow in the inner ring of the fan 1 to the outer ring of the fan 1 in the radial direction, which is beneficial to reduce wind loss.

[0051] For example, the first blade 121 extends radially along the fan 12, and the second blade 122 extends radially along the fan 12.

[0052] In one example, within the radial projection of the base 11, the first base surface 111 and the second base surface 112 completely overlap, the upper height of the first blade 121 is flush with the upper height of the second blade 122, and the lower height of the second blade 122 is flush with the lower height of the second blade 122. This allows all the radial wind generated by the inner blades to be absorbed by the negative pressure of the outer blades and compressed twice before being blown outward, thereby reducing the wind loss of the inner blades.

[0053] Optionally, such as Figure 2 and Figure 4 As shown, the base 11 has a first side 101 facing the cooking cavity 21 and a second side 102 away from the cooking cavity 21. The first blade 121 and the second blade 122 are both arranged facing the first side 101. A first base surface 111 is located radially outside the second base surface 112. In the direction from the second side 102 to the first side 101, the first base surface 111 extends obliquely away from the axis of the base 11. An angle α1 is formed between the first base surface 111 and the axis of the base 11, where 0 < α1 < 90°. Because the first base surface 111 is located radially outside the second base surface 112, and an angle α1 is formed between the first base surface 111 and the axis of the base 11, the first base surface 111 of the outer ring of the fan 1 has a certain slope. When the fan 1 rotates, the fan 1 can tilt and discharge air towards the cooking cavity 21, further improving the airflow efficiency of the fan 1. In addition, since the fan 1 has a certain tilt angle when it blows air, it can reduce the local turbulence loss caused by the radial airflow of the fan 1 perpendicularly contacting the wall of the cooking cavity 21, which is beneficial to reduce wind loss.

[0054] In one example, such as Figure 4 As shown, 30°≤α1≤60°. For example, α1 can be 30°, 40°, 50°, or 60°. By adopting the above-mentioned tilt angle range for the first base surface 111, the fan 1 of the embodiment of the present invention can increase the airflow velocity while increasing the air delivery range of the fan 1, thereby improving the food cooking rate and the uniformity of food heating.

[0055] Optionally, such as Figures 4 to 8 As shown, the substrate 11 also includes a third base plane 113, which is located between the first base plane 111 and the second base plane 112. The third base plane 113 is orthogonal to the axis of the substrate 11. The included angle β between the second base plane 112 and the third base plane 113 is 90°≤β≤180°. It can be understood that the third base plane 113 is parallel to the horizontal plane, and the included angle between the second base plane 112 and the third base plane 113 is a right angle, an obtuse angle, or a straight angle.

[0056] In the embodiment of the present invention, the fan 1 can be provided with a third base surface 113 to space the first blade 121 and the second blade 122 by a certain distance in the radial direction, which can increase the air supply range of the fan 1 and increase the radial distance between the air outlet area and the air return area of ​​the fan 1, thereby reducing the probability that the airflow is directly drawn back to the nearest air return area after being discharged from the air outlet area of ​​the fan 1, which is beneficial to reduce wind loss.

[0057] Optionally, such as Figure 7 and Figure 8 As shown, the fan blade 12 includes a plurality of third blades 123, which are arranged circumferentially along the third base surface 113. This allows for the generation of more airflow while maintaining the fan speed 1, thereby delivering more hot air to the food, improving cooking efficiency and the uniformity of heating.

[0058] Optionally, such as Figure 9 and Figure 10 As shown, the base 11 has a first side 101 facing the cooking cavity 21 and a second side 102 away from the cooking cavity 21. The first blade 121 and the second blade 122 are both arranged facing the first side 101. A first base surface 111 is located radially outside the second base surface 112. The first base surface 111 is orthogonal to the axis of the base 11. In the direction from the second side 102 to the first side 101, the second base surface 112 extends obliquely towards the axis of the base 11, with an angle α2 between the second base surface 112 and the axis of the base 11, where 0 < α2 < 90°. It can be understood that the first base surface 111 is parallel to the horizontal plane, and the second base surface 112 extends gradually towards the axis of the base 11, closer to the cooking cavity 21. When the fan 1 rotates, the second blade 122 can dissipate air radially at an oblique angle. Part of the airflow can be compressed twice by the first blade 121 before being blown outwards, achieving secondary transmission of airflow to increase the air volume and air pressure.

[0059] For example, such as Figure 9 As shown, α2 can be 30°, 40°, 50°, or 60°. By adopting the above-mentioned tilt angle range for the second base surface 112, the fan 1 of the embodiment of the present invention can increase the airflow velocity while increasing the airflow range of the fan 1, thereby improving the food cooking rate and the uniformity of food heating.

[0060] Optionally, such as Figure 10As shown, the base 11 also includes a third base surface 113, which is located radially inside the second base surface 112 and is orthogonal to the axis of the base 11. The fan blade 12 includes multiple third blades 123, which are arranged circumferentially along the third base surface 113. This allows for the generation of more airflow while maintaining the fan speed, enabling the delivery of more hot air to the food, improving cooking efficiency and the uniformity of heating. Furthermore, the arrangement of the third blades 123 shifts the overall negative pressure return air area of ​​the fan 1 closer to the axis of the fan 1, reducing the negative pressure value at the air outlet of the fan 1's edge area. This prevents the airflow from being directly drawn back into the nearby negative pressure return air area after being discharged from the fan 1's outlet area, thus reducing wind loss.

[0061] Optionally, such as Figure 11 and Figure 12 As shown, the base 11 has a first side 101 facing the cooking cavity 21 and a second side 102 away from the cooking cavity 21. The first blade 121 and the second blade 122 are both arranged facing the first side 101. The first base surface 111 is located radially outside the second base surface 112. The first base surface 111 is parallel to the axis of the base 11. In the direction from the second side 102 to the first side 101, the second base surface 112 extends obliquely in a direction that gradually approaches the axis of the base 11. The second base surface 112 and the axis of the base 11 have an included angle α2, where 0 < α2 < 90°.

[0062] Because the second base surface 112 has an included angle α2 with the axis of the base 11, the second base surface 112 of the inner ring of the fan 1 has a certain slope. When the fan 1 rotates, the second blade 122 of the inner ring of the fan 1 can tilt towards the cooking cavity 21 to discharge air, further improving the air discharge efficiency of the fan 1. In addition, because the first base surface 111 is located radially outside the second base surface 112 and is parallel to the axis of the base 11, some airflow can be compressed twice by the first blade 121 and then blown outward, so as to realize the secondary transmission and relay of airflow, thereby improving the air volume and air pressure.

[0063] For example, α2 can be 30°, 40°, 50°, or 60°.

[0064] Optionally, such as Figure 12As shown, the base 11 also includes a third base surface 113, which is located between the first base surface 111 and the second base surface 112. The third base surface 113 is orthogonal to the axis of the base 11. The fan blade 12 includes multiple third blades 123, which are arranged circumferentially along the third base surface 113. This allows for the generation of more airflow while maintaining the fan speed, enabling the delivery of more hot air to the food, thus improving cooking efficiency and the uniformity of heating. Furthermore, the arrangement of the third blades 123 shifts the overall negative pressure return air area of ​​the fan 1 to a region closer to the axis of the fan 1, reducing the negative pressure value at the air outlet of the fan 1's edge area. This prevents the airflow from being directly drawn back into the nearby negative pressure return air area after being discharged from the fan 1's outlet area, thereby reducing wind loss.

[0065] In some embodiments, such as Figure 3 As shown, the first blade 121 is located radially outside the second blade 122, and the number of first blades 121 is not less than the number of second blades 122. This reduces the problem of airflow attenuation caused by multiple transmissions between the inner and outer rings of the fan 1. Since the outer ring (first base surface 111) of the fan 1 has a larger diameter than the inner ring (second base surface 112) of the fan 1, and has more blades and a larger area, the outer ring of the fan 1 has a larger linear velocity at the same rotational speed, resulting in a larger airflow velocity and volume. According to Bernoulli's principle, the greater the airflow velocity and volume of the outer ring, the greater the negative pressure. This allows all the airflow generated by the inner ring of the fan 1 to be transferred to the negative pressure area of ​​the outer ring of the fan 1, reducing the loss or attenuation of the airflow generated by the inner ring.

[0066] Optionally, such as Figure 3 As shown, the first blade 121 is orthogonal to the first base plane 111, and the second blade 122 is orthogonal to the second base plane 112, which can improve the air supply effect when the first blade 121 and the second blade 122 rotate and increase the air volume.

[0067] Taking the formation of the first blade 121 on the first base surface 111 as an example, the first base surface 111 is provided with a plurality of hollow holes 1111, and the plurality of first blades 121 correspond one-to-one with the plurality of hollow holes 1111. The outer contour of the hollow holes 1111 is consistent with the outer contour of the first blade 121. Thus, the contour of the first blade 121 can be punched out from the first base surface 111 and bent to form the first blade 121, thereby facilitating the processing and manufacturing of the fan 1.

[0068] In one example, such as Figure 3 As shown, the base 11 and the fan blade 12 are integrally formed, meaning that the first blade 121 and the second blade 122 can rotate at the same speed.

[0069] In another example, the first base surface 111 and the second base surface 112 are separate structures and can rotate relative to each other. That is, the first base surface 111 and the second base surface 112 are driven by different driving sources, which allows the first blade 121 and the second blade 122 to rotate at different speeds, which is beneficial to improving the flexibility of the fan 1 during use and the air delivery effect is better.

[0070] like Figure 1 As shown, another embodiment of the air fryer of the present invention includes a body 2, a motor 3 and a fan 1. The body 2 is provided with a cooking chamber 21. The motor 3 has a drive shaft. The fan 1 is the fan 1 of the present invention. The fan 1 is located on the upper side of the cooking chamber 21, and the first blade 121 and the second blade 122 are located on the side of the base 11 facing the cooking chamber 21. The drive shaft is connected to the base 11.

[0071] According to an embodiment of the present invention, the air fryer has a first base surface 111 and a second base surface 112 arranged radially along the base 11. Multiple first blades 121 are arranged circumferentially on the first base surface 111, and multiple second blades 122 are arranged circumferentially on the second base surface 112. This increases the radial distance between the exhaust and return air areas of the fan 1 when the fan 1 rotates, reducing the probability that airflow discharged from the exhaust area of ​​the fan 1 will be directly drawn back into the nearby return air area, thus reducing airflow loss. Since at least one of the first base surface 111 and the second base surface 112 has an angle α with the axis of the base 11, the exhaust angle of the fan 1 can have a certain slope, improving the exhaust efficiency of the fan 1. Therefore, the air fryer of this embodiment has a reasonable structural design, reduces airflow loss, and has high exhaust efficiency, thereby improving the circulation effect of hot air within the cooking chamber 21.

[0072] like Figure 1 As shown, the fan 1 is located above the cooking cavity 21, and the first blade 121 and the second blade 122 are both arranged downwards.

[0073] In other examples, the fan 1 may also be positioned below the cooking cavity 21, with the first blade 121 and the second blade 122 both facing upwards.

[0074] like Figure 1 As shown, the air fryer also includes a heating element 4, which is located below the fan 1. The heating element 4 can generate heat. When the fan 1 rotates, the fan 1 can deliver hot air into the cooking chamber 21 and circulate hot air.

[0075] In the description of this invention, 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," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0076] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0077] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0078] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0079] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0080] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A fan (1), characterized in that, include: The substrate (11) includes a first base surface (111) and a second base surface (112), the first base surface (111) and the second base surface (112) are arranged sequentially along the radial direction of the substrate (11), and at least one of the first base surface (111) and the second base surface (112) has an angle α with the axis of the substrate (11), wherein 0 < α < 90°; The fan blade (12) includes a plurality of first blades (121) and a plurality of second blades (122). The plurality of first blades (121) are arranged at intervals along the circumference of the base (11) on the first base surface (111), and the plurality of second blades (122) are arranged at intervals along the circumference of the base (11) on the second base surface (112).

2. The fan (1) according to claim 1, characterized in that, In the radial projection of the substrate (11), at least a portion of the first base surface (111) and at least a portion of the second base surface (112) overlap.

3. The fan (1) according to claim 1, characterized in that, In the radial projection of the substrate (11), at least a portion of the first blade (121) and at least a portion of the second blade (122) overlap.

4. The fan (1) according to claim 1, characterized in that, The base (11) has a first side (101) facing the cooking cavity (21) and a second side (102) away from the cooking cavity (21). The first blade (121) and the second blade (122) are both arranged facing the first side (101). The first base surface (111) is located radially outside the second base surface (112). In the direction from the second side (102) to the first side (101), the first base surface (111) extends obliquely in a direction gradually away from the axis of the base (11). The first base surface (111) and the axis of the base (11) have an included angle α1, where 0 < α1 < 90°.

5. The fan (1) according to claim 4, characterized in that, 30°≤α1≤60°。 6. The fan according to claim 4, characterized in that, The substrate (11) further includes a third base surface (113), which is disposed between the first base surface (111) and the second base surface (112). The third base surface (113) is orthogonal to the axis of the substrate (11), and the included angle β between the second base surface (112) and the third base surface (113) is 90°≤β≤180°.

7. The fan according to claim 6, characterized in that, The fan blade (12) includes a plurality of third blades (123), which are arranged circumferentially along the third base surface (113).

8. The fan according to claim 1, characterized in that, The base (11) has a first side (101) facing the cooking cavity (21) and a second side (102) facing away from the cooking cavity (21). The first blade (121) and the second blade (122) are both arranged facing the first side (101). The first base surface (111) is located radially outside the second base surface (112). The first base surface (111) is orthogonal to the axis of the base (11). In the direction from the second side (102) to the first side (101), the second base surface (112) extends obliquely in a direction gradually closer to the axis of the base (11). The second base surface (112) and the axis of the base (11) have an included angle α2, where 0 < α2 < 90°.

9. The fan according to claim 8, characterized in that, The base (11) further includes a third base surface (113), which is located radially inside the second base surface (112). The third base surface (113) is orthogonal to the axis of the base (11). The fan blade (12) includes a plurality of third blades (123), which are arranged circumferentially along the third base surface (113).

10. The fan according to claim 1, characterized in that, The base (11) has a first side (101) facing the cooking cavity (21) and a second side (102) away from the cooking cavity (21). The first blade (121) and the second blade (122) are both arranged facing the first side (101). The first base surface (111) is located radially outside the second base surface (112). The first base surface (111) is parallel to the axis of the base (11). In the direction from the second side (102) to the first side (101), the second base surface (112) extends obliquely in a direction gradually closer to the axis of the base (11). The second base surface (112) has an included angle α2 with the axis of the base (11), where 0 < α2 < 90°.

11. The fan according to claim 10, characterized in that, The base (11) further includes a third base surface (113), which is disposed between the first base surface (111) and the second base surface (112). The third base surface (113) is orthogonal to the axis of the base (11). The fan blade (12) includes a plurality of third blades (123), which are arranged circumferentially along the third base surface (113).

12. The fan according to any one of claims 1-11, characterized in that, The first blade (121) is located radially outside the second blade (122), and the number of the first blade (121) is not less than the number of the second blade (122); And / or, the first blade (121) is orthogonal to the first base plane (111), and the second blade (122) is orthogonal to the second base plane (112).

13. An air fryer, characterized in that, include: The body (2) has a cooking cavity (21) inside; Motor (3), said motor (3) having a drive shaft; The fan (1) is the fan (1) according to any one of claims 1-12. The fan (1) is disposed on the upper side of the cooking cavity (21), and the first blade (121) and the second blade (122) are disposed on the side of the base (11) facing the cooking cavity (21). The drive shaft is connected to the base (11).

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