Fan blade assembly, hot air device and cooking utensil

Abstract

The utility model provides a fan blade assembly, a hot air device and a cooking utensil, the fan blade assembly comprises: an impeller, along the axial direction of the impeller, the impeller comprises a first side and a second side opposite to each other; the multiple blades are arranged on the impeller, and the multiple blades are arranged in the circumferential direction of the impeller; the turbulent flow part is arranged on at least one blade, the first end of the turbulent flow part is connected with the blade, and the second end of the turbulent flow part extends towards the first side or the second side in the direction away from the blade.

Description

Technical Field

[0001] The utility model relates to the technical field of fan blade structures, in particular to a fan blade assembly, a hot air device and a cooking utensil. Background Art

[0002] With the continuous extension of product scenarios, products are developing in the direction of miniaturization and multi-functionality. Extreme products lead to extreme space. For heat dissipation modules or hot air modules, the diameter or height of the fan blades is limited. In addition, due to the expansion of dual-cavity scenarios of upper and lower double hot air or left and right double hot air, the original single hot air at the back or top becomes double hot air, which also makes the diameter of the fan blade smaller.

[0003] However, due to the small diameter of the fan blades, the airflow generated when the fan blades rotate is small, affecting the uniformity of heating of the food. If the speed of the motor is increased, the noise during the cooking process will be higher, affecting the user experience. Utility Model Content

[0004] The embodiments of the utility model are intended to solve at least one of the technical problems existing in the prior art.

[0005] To this end, a first aspect of an embodiment of the utility model provides a fan blade assembly.

[0006] A second aspect of the embodiments of the present utility model provides a hot air device.

[0007] A third aspect of the embodiments of the present invention provides a cooking utensil.

[0008] In view of this, according to the first aspect of an embodiment of the utility model, a fan blade assembly is provided, the fan blade assembly comprising: an impeller, along the axial direction of the impeller, the impeller comprises a first side and a second side opposite to each other; a plurality of blades, provided on the impeller, and the plurality of blades are arranged along the circumference of the impeller; a spoiler, provided on at least one blade, the first end of the spoiler is connected to the blade, and the second end of the spoiler extends toward the first side or the second side in a direction away from the blade.

[0009] The fan blade assembly provided in the embodiment of the utility model includes an impeller and a plurality of blades. Specifically, the plurality of blades are arranged on the impeller, and the plurality of blades are arranged along the circumference of the impeller. It can be understood that the impeller can drive the plurality of blades to rotate to generate airflow.

[0010] Optionally, the generated airflow is used for heat dissipation, that is, the heat dissipation structure includes the fan blade assembly, and the airflow generated by the fan blade assembly is used to dissipate heat from the components to be dissipated, thereby increasing the service life of the components to be dissipated.

[0011] Optionally, the generated airflow is used to form hot air, that is, the hot air device includes the fan blade assembly and the heating tube, wherein the heating tube is located on the flow path of the airflow, that is, when the airflow generated by the fan blade assembly flows through the heating tube, the airflow can be heated to form a hot airflow, and the hot airflow can flow into the cooking cavity of the cooking utensil to heat and cook the food in the cooking cavity.

[0012] The spoiler is arranged on at least one blade. Optionally, the spoilers are arranged on a plurality of blades respectively, or each blade is arranged on a spoiler.

[0013] The impeller includes a first side and a second side along the axial direction of the impeller. The first end of the spoiler is connected to the blade, and the second end of the spoiler extends toward the first side or the second side in a direction away from the blade. In other words, the second end of the spoiler extends toward one side on the impeller axial direction in a direction away from the blade.

[0014] Since the spoiler extends along one side of the impeller axis, the overall area of ​​the multiple blades can be increased without increasing the radial size of the fan blade assembly, thereby ensuring the miniaturization of the fan blade assembly while improving the efficiency of the fan blade assembly and the flow rate of the airflow generated by the fan blade assembly, thereby achieving efficient circulation of hot air in the hot air device with the fan blade assembly, that is, achieving efficient circulation of hot air in the deep cavity of the cooking utensil, improving the uniformity of heating of food in the cooking utensil, and thereby improving the cooking effect.

[0015] Moreover, while ensuring the original motor speed, it achieves ultimate efficiency and large flow, that is, there is no need to increase the air flow by increasing the motor speed, thereby reducing the noise generated by the cooking appliance during the cooking process and improving the user experience.

[0016] Optionally, the spoiler is an integral structure with the blade, or the spoiler is welded to the blade, which can be specifically configured according to actual needs.

[0017] Optionally, the fan blade assembly is a centrifugal fan blade. It is understandable that the centrifugal fan blade is a functional output device of the air duct. The flow rate and effective power of the airflow it generates are the main evaluation indicators of its air duct performance.

[0018] In addition, the fan blade assembly provided by the above technical solution of the utility model also has the following additional technical features:

[0019] In some technical solutions, optionally, along the axial direction of the impeller, a spacing H between the second end of the spoiler and a side surface of the blade facing away from the spoiler satisfies 10 mm ≤ H ≤ 30 mm.

[0020] In this technical solution, a range of values ​​of the distance between the second end of the spoiler and a side surface of the blade facing away from the spoiler in the axial direction of the impeller is defined.

[0021] Specifically, the distance between the second end of the spoiler and the side surface of the blade facing away from the spoiler in the axial direction of the impeller is between 10 mm and 30 mm, which limits the range of the height of the entire blade assembly in the axial direction of the impeller.

[0022] It is understandable that if the height of the fan blade assembly as a whole in the axial direction of the impeller is too small, that is, H is less than 10mm, the overall area of ​​the multiple blades will not increase significantly, and the airflow rate will not increase significantly. If the height of the fan blade assembly as a whole in the axial direction of the impeller is too large, that is, H is greater than 30mm, the fan blade assembly will use more materials, increasing the cost, and the overall weight of the fan blade assembly will be heavier, requiring an increase in the power of the motor driving the fan blade assembly to rotate, resulting in high energy consumption.

[0023] By limiting the height of the entire fan blade assembly in the axial direction of the impeller to between 10 mm and 30 mm, the production cost of the fan blade assembly can be ensured while significantly increasing the air flow rate.

[0024] Optionally, 18.5mm≤H≤30mm.

[0025] In some technical schemes, optionally, along the radial direction of the impeller, the end of the first end of the spoiler away from the center of the impeller is the outer edge portion; with the center of the impeller as the center and a circle passing through the outer edge portion as the base circle, the angle between the extension line of the connection between the first end of the spoiler and the blade and the tangent line of the base circle at the outer edge portion is the outlet angle; wherein the outlet angle α satisfies 61°≤α≤81°.

[0026] In this technical solution, the value range of the outlet angle of the fan blade assembly is limited. Specifically, the outlet angle of the fan blade assembly is between 61° and 81°.

[0027] Specifically, along the radial direction of the impeller, the end of the first end of the spoiler away from the center of the impeller is the outer edge. The center of the impeller is taken as the center of the circle and the circle passing through the outer edge is taken as the base circle, that is, the center of the impeller is taken as the center of the circle and the length of the line connecting the outer edge and the center of the impeller is taken as the radius.

[0028] The angle formed by the extension line of the connection between the first end of the spoiler and the blade and the tangent line of the base circle at the outer edge is the outlet angle.

[0029] By limiting the outlet angle of the fan blade assembly to between 61° and 81°, the flow rate of the airflow generated by the fan blade assembly and the effective power of the fan blade assembly are significantly improved. While ensuring the miniaturization of the fan blade assembly, the flow rate and effective power of the airflow generated by the fan blade assembly are comprehensively improved, thereby achieving deep cavity cooking of the cooking appliance.

[0030] In some technical solutions, optionally, along the radial direction of the impeller, the end of the first end of the spoiler away from the center of the impeller is the outer edge, and the length a of the line connecting the outer edge and the center of the impeller satisfies 90mm≤2a≤300mm.

[0031] In this technical solution, along the radial direction of the impeller, the end of the second end of the spoiler away from the center of the impeller is the outer edge portion, and twice the length of the line connecting the outer edge portion and the center of the impeller is the outer diameter of the fan blade assembly. 2a is between 90mm and 300mm, which limits the value range of the outer diameter of the fan blade assembly, and also limits the overall size of the fan blade assembly. This allows the fan blade assembly to be miniaturized while ensuring the flow rate of the airflow generated by the fan blade assembly, thereby achieving extreme efficiency and large flow under limited space conditions, thereby realizing deep cavity cooking of the cooking appliance.

[0032] In some technical solutions, optionally, the end of any blade facing the center of the impeller is the blade root, and the length b of the line connecting the blade root and the center of the impeller and the length a of the line connecting the outer edge and the center of the impeller satisfy 0.3≤b / a≤0.8.

[0033] In this technical solution, the end of any blade facing the impeller center is the blade root. Specifically, the ratio of the length b of the line connecting the blade root and the impeller center to the length a of the line connecting the outer edge and the impeller center is between 0.3 and 0.8.

[0034] It is understandable that twice the length of the line connecting the blade root and the center of the impeller is the inner diameter of the blade assembly, which limits the range of the hub ratio of the blade assembly, that is, 2b / 2a is between 0.3 and 0.8.

[0035] By limiting the hub ratio of the fan blade assembly to between 0.3 and 0.8, the airflow rate and effective power can be increased while ensuring the radial size of the fan blade assembly, thereby achieving deep cavity and efficient circulation of hot air in the cooking appliance.

[0036] Optionally, 0.5≤b / a≤0.8.

[0037] Optionally, 0.5≤b / a≤0.7.

[0038] In some technical solutions, optionally, the number Z of blades satisfies 6≤Z≤12.

[0039] In this technical solution, the range of the number of blades is limited. Specifically, the number of blades is between 6 and 12. This can further increase the flow rate of the airflow generated by the fan blade assembly, and realize the efficient circulation of hot air formed by the hot air device with the fan blade assembly, that is, realize the efficient circulation of hot air in the deep cavity of the cooking utensil, improve the uniformity of heating of the food in the cooking utensil, and thus improve the cooking effect.

[0040] Optionally, 6≤Z≤8.

[0041] Optionally, Z=7.

[0042] In some technical solutions, optionally, the spoiler and the blade are an integrated structure.

[0043] In this technical solution, it is defined that the spoiler and the blade are an integrated structure. Specifically, a portion of the blade is bent toward the first side or the second side to form the spoiler.

[0044] It can be understood that the integrated structure has good mechanical properties, and thus can improve the connection strength between the spoiler and the blade, extend the service life of the fan blade assembly, and ensure the output of a large flow of airflow of the fan blade assembly.

[0045] In addition, the integrated structure facilitates processing and production, reduces manufacturing difficulty, and improves production efficiency, thereby reducing the production cost of the fan blade assembly.

[0046] It can be understood that, when the spoiler is fixed to the blade by welding, the number of blades can be increased accordingly to further improve the flow rate of the airflow generated by the fan blade assembly.

[0047] According to the second aspect of the utility model, a hot air device is provided, including a fan blade assembly as provided by any of the above technical solutions, thereby having all the beneficial technical effects of the fan blade assembly, which will not be repeated here.

[0048] Furthermore, the hot air device also includes a driving member and a heating pipe, wherein the driving member is connected to the impeller, and the driving member can drive multiple blades to rotate through the impeller to generate airflow, and at least a portion of the heating pipe is located on the flow path of the airflow.

[0049] The hot air device provided in the embodiment of the utility model includes a fan blade assembly, a driving member and a heat pipe. Specifically, the driving member is connected to the impeller, that is, when the driving member is driven, the impeller can drive multiple blades to rotate to generate airflow.

[0050] Since a spoiler is provided on at least one blade, the overall area of ​​the plurality of blades can be increased without increasing the radial dimension of the fan blade assembly, thereby improving the efficiency of the fan blade assembly and the flow rate of the airflow generated by the fan blade assembly while ensuring the miniaturization of the fan blade assembly.

[0051] At least a portion of the heating tube is located on the flow path of the airflow, that is, the airflow will flow through the heating tube during the flow process, so that the airflow is heated after passing through the heating tube to form a hot airflow, and the hot airflow enters the cooking cavity to heat and cook the food in the cooking cavity.

[0052] Since the efficiency of the fan blade assembly and the flow rate of the airflow generated by the fan blade assembly are improved, that is, the flow rate of the hot air flow is improved, efficient circulation of hot air can be achieved, that is, efficient circulation of hot air in the deep cavity of the cooking appliance is achieved, the uniformity of heating of food in the cooking appliance is improved, and then the cooking effect is improved.

[0053] Optionally, the drive member comprises a motor.

[0054] According to the third aspect of the utility model, a cooking utensil is provided, comprising at least two hot air devices as provided by any of the above technical solutions, thereby having all the beneficial technical effects of the hot air device, which will not be repeated here.

[0055] Furthermore, the cooking appliance also includes a body, which is provided with at least two cooking cavities and at least two installation cavities, each cooking cavity is connected to an installation cavity, and at least two hot air devices are respectively arranged in the at least two installation cavities.

[0056] The cooking device provided by the embodiment of the utility model comprises at least two hot air devices and a body, specifically, the body is provided with at least two cooking cavities and at least two installation cavities, and each cooking cavity is connected with an installation cavity. The at least two hot air devices are respectively arranged in the at least two installation cavities.

[0057] Specifically, when the hot air device starts working, the driving member drives the fan blade assembly to rotate to generate airflow, and the airflow is heated after passing through the heating tube to form a hot airflow, and the hot airflow enters the cooking cavity to heat and cook the food in the cooking cavity.

[0058] It is understandable that the cooking utensil has a multi-cavity structure, so that multiple ingredients can be cooked at the same time, the cooking effect is improved, and there is no smell transfer, which enriches the user's cooking experience.

[0059] Since the cooking appliance has a multi-cavity structure and each cavity structure (cooking cavity) needs to be equipped with a hot air device, the radial size of the fan blade assembly is limited.

[0060] Since a spoiler is provided on at least one blade, the overall area of ​​the plurality of blades can be increased without increasing the radial size of the fan blade assembly, thereby ensuring the miniaturization of the fan blade assembly while improving the efficiency of the fan blade assembly and the flow rate of the airflow generated by the fan blade assembly, thereby achieving efficient circulation of hot air in the deep cavity of the cooking utensil, improving the uniformity of heating of food in the cooking utensil, and thereby improving the cooking effect.

[0061] In addition, the cooking utensil provided according to the above technical solution of the utility model also has the following additional technical features:

[0062] In some technical solutions, optionally, the machine body is further provided with a connecting portion, and each cooking cavity is connected with an installation cavity through the connecting portion; wherein the connecting portion includes a plurality of through holes or shutters.

[0063] In this technical solution, it is defined that the machine body is also provided with a connecting part. Specifically, each cooking cavity is connected with an installation cavity through the connecting part, so that the hot air generated by the hot air device can enter the cooking cavity through the connecting part to achieve heating and cooking of the food in the cooking cavity.

[0064] Moreover, since a spoiler is provided on at least one blade, the efficiency of the fan blade assembly and the flow rate of airflow generated by the fan blade assembly can be improved while ensuring the miniaturization of the fan blade assembly, thereby achieving efficient circulation of hot air in the cooking cavity, thereby improving the uniformity of heating of food in the cooking cavity and improving the cooking effect.

[0065] The connecting portion includes a plurality of through holes or shutters, which can be specifically arranged according to actual needs.

[0066] In some technical solutions, optionally, the cooking appliance includes an air fryer, an oven, a steam oven, or a microwave oven and steamer.

[0067] In this technical solution, specifically, the cooking appliance includes an air fryer, an oven, a steam oven or a microwave oven and steamer.

[0068] Specifically, when the cooking appliance includes a microwave oven, it can be understood that since the microwave oven uses microwaves to heat food when working, the aperture of the through hole connecting the installation cavity and the cooking cavity is generally made smaller, generally less than 6 mm, to prevent microwave leakage.

[0069] By providing a spoiler on at least one blade, the efficiency of the fan blade assembly and the flow rate of airflow generated by the fan blade assembly can be improved while ensuring the miniaturization of the fan blade assembly. Even if the aperture of the through hole connecting the installation cavity and the cooking cavity is small, efficient circulation of deep-cavity hot air in the microwave oven can be achieved, thereby improving the cooking effect of the microwave oven.

[0070] Additional aspects and advantages of the present invention will be given in the following description, and some will become apparent from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0071] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0072] Figure 1 One of the structural schematic diagrams of a fan blade assembly according to an embodiment of the utility model is shown;

[0073] Figure 2 A second structural schematic diagram of a fan blade assembly according to an embodiment of the utility model is shown;

[0074] Figure 3 A third structural schematic diagram of a fan blade assembly according to an embodiment of the utility model is shown;

[0075] Figure 4 One of the structural schematic diagrams of a cooking utensil according to an embodiment of the utility model is shown;

[0076] Figure 5 A second structural schematic diagram of a cooking appliance according to an embodiment of the utility model is shown.

[0077] in, Figures 1 to 5 The corresponding relationship between the reference numerals and the component names is as follows:

[0078] 100 fan blade assembly, 110 impeller, 111 first side, 112 second side, 120 blade, 121 blade root, 130 spoiler, 131 first end, 132 second end, 133 outer edge, 140 base circle, 150 extension line, 160 tangent line, 200 hot air device, 210 driving member, 220 heating pipe, 300 cooking utensil, 310 machine body, 311 cooking cavity, 312 installation cavity, 313 connecting part. DETAILED DESCRIPTION

[0079] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0080] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0081] Refer to the following Figures 1 to 5 The fan blade assembly 100, the hot air device 200 and the cooking appliance 300 provided according to some embodiments of the present invention are described.

[0082] In one embodiment according to the present application, Figure 1 , Figure 2 and Figure 3As shown, a fan blade assembly 100 is proposed, and the fan blade assembly 100 includes: an impeller 110, along the axial direction of the impeller 110, the impeller 110 includes a first side 111 and a second side 112 opposite to each other; a plurality of blades 120, provided on the impeller 110, and the plurality of blades 120 are arranged along the circumference of the impeller 110; a spoiler 130, provided on at least one blade 120, the first end 131 of the spoiler 130 is connected to the blade 120, and the second end 132 of the spoiler 130 extends toward the first side 111 or the second side 112 in a direction away from the blade 120.

[0083] The fan blade assembly 100 provided in the embodiment of the utility model includes an impeller 110 and a plurality of blades 120. Specifically, the plurality of blades 120 are disposed on the impeller 110, and the plurality of blades 120 are arranged along the circumference of the impeller 110. It is understandable that the impeller 110 can drive the plurality of blades 120 to rotate to generate airflow.

[0084] Optionally, the generated airflow is used for heat dissipation, that is, the heat dissipation structure includes the fan blade assembly 100, and the airflow generated by the fan blade assembly 100 is used to dissipate heat from the components to be dissipated, thereby increasing the service life of the components to be dissipated.

[0085] Optionally, the generated airflow is used to form hot air, that is, the hot air device 200 includes the fan blade assembly 100 and the heating tube 220, wherein the heating tube 220 is located on the flow path of the airflow, that is, when the airflow generated by the fan blade assembly 100 flows through the heating tube 220, the airflow can be heated to form a hot airflow, and the hot airflow can flow into the cooking cavity 311 of the cooking utensil 300 to heat and cook the food in the cooking cavity 311.

[0086] The spoiler 130 is disposed on at least one blade 120. Optionally, the spoilers 130 are respectively disposed on a plurality of blades 120, or each blade 120 is disposed on a spoiler 130.

[0087] Along the axial direction of the impeller 110, the impeller 110 includes a first side 111 and a second side 112. The first end 131 of the spoiler 130 is connected to the blade 120, and the second end 132 of the spoiler 130 extends toward the first side 111 or the second side 112 in a direction away from the blade 120. In other words, the second end 132 of the spoiler 130 extends toward one side of the impeller 110 in the axial direction in a direction away from the blade 120.

[0088] Since the spoiler 130 extends along one side of the axial direction of the impeller 110, the overall area of ​​the multiple blades 120 can be increased without increasing the radial size of the fan blade assembly 100, thereby ensuring the miniaturization of the fan blade assembly 100 while improving the efficiency of the fan blade assembly 100 and the flow rate of the airflow generated by the fan blade assembly 100, thereby achieving efficient circulation of hot air by the hot air device 200 with the fan blade assembly 100, that is, achieving efficient circulation of hot air in the deep cavity of the cooking utensil 300, improving the uniformity of heating of food in the cooking utensil 300, and thereby improving the cooking effect.

[0089] Moreover, while ensuring the original motor speed, extreme efficiency and large flow are achieved, that is, there is no need to increase the air flow by increasing the motor speed, thereby reducing the noise generated by the cooking appliance 300 during cooking and improving the user experience.

[0090] Optionally, the spoiler 130 and the blade 120 are an integral structure. Alternatively, the spoiler 130 is welded to the blade 120. The specific configuration can be made according to actual needs.

[0091] Optionally, the fan blade assembly 100 is a centrifugal fan blade. It is understandable that the centrifugal fan blade is a functional output device of the air duct. The flow rate and effective power of the airflow it generates are the main evaluation indicators of its air duct performance.

[0092] like Figure 3 As shown, in some embodiments, optionally, along the axial direction of the impeller 110 , a spacing H between the second end 132 of the spoiler 130 and a side surface of the blade 120 away from the spoiler 130 satisfies 10 mm≤H≤30 mm.

[0093] In this embodiment, a range of values ​​of the distance between the second end 132 of the spoiler 130 and a side surface of the blade 120 facing away from the spoiler 130 in the axial direction of the impeller 110 is defined.

[0094] Specifically, the distance between the second end 132 of the spoiler 130 and the side of the blade 120 away from the spoiler 130 in the axial direction of the impeller 110 is between 10 mm and 30 mm, which limits the range of the height of the entire blade assembly 100 in the axial direction of the impeller 110 .

[0095] It is understandable that if the overall height of the fan blade assembly 100 in the axial direction of the impeller 110 is too small, that is, H is less than 10 mm, the overall area of ​​the plurality of blades 120 does not increase significantly, and the airflow rate does not increase significantly. If the overall height of the fan blade assembly 100 in the axial direction of the impeller 110 is too large, that is, H is greater than 30 mm, the fan blade assembly 100 uses more material, which increases the cost, and the overall weight of the fan blade assembly 100 is heavier, and the power of the motor driving the fan blade assembly 100 to rotate needs to be increased, resulting in high energy consumption.

[0096] By limiting the height of the entire fan blade assembly 100 in the axial direction of the impeller 110 to between 10 mm and 30 mm, the production cost of the fan blade assembly 100 can be ensured while significantly increasing the airflow rate.

[0097] Optionally, 18.5mm≤H≤30mm.

[0098] like Figure 2 As shown, in some embodiments, optionally, along the radial direction of the impeller 110, the end of the first end 131 of the spoiler 130 away from the center of the impeller 110 is the outer edge 133; with the center of the impeller 110 as the center and a circle passing through the outer edge 133 as the base circle 140, the angle between the extension line 150 of the connection between the first end 131 of the spoiler 130 and the blade 120 and the tangent 160 of the base circle 140 at the outer edge 133 is the outlet angle; wherein the outlet angle α satisfies 61°≤α≤81°.

[0099] In this embodiment, the value range of the outlet angle of the fan blade assembly 100 is limited. Specifically, the outlet angle of the fan blade assembly 100 is between 61° and 81°.

[0100] Specifically, along the radial direction of the impeller 110, the end of the first end 131 of the spoiler 130 away from the center of the impeller 110 is the outer edge 133. The center of the impeller 110 is taken as the center O, and the circle passing through the outer edge 133 is taken as the base circle 140, that is, the center of the impeller 110 is taken as the center O, and the circle with the length of the line connecting the outer edge 133 and the center of the impeller 110 as the radius is taken as the base circle 140.

[0101] An angle formed by an extension line 150 of a connection point between the first end 131 of the spoiler 130 and the blade 120 and a tangent line 160 of the base circle 140 at the outer edge 133 is an exit angle.

[0102] By limiting the outlet angle of the fan blade assembly 100 between 61° and 81°, the flow rate of the airflow generated by the fan blade assembly 100 and the effective power of the fan blade assembly 100 are significantly improved, thereby ensuring the miniaturization of the fan blade assembly 100 while achieving a comprehensive improvement in the flow rate and effective power of the airflow generated by the fan blade assembly 100, thereby achieving deep cavity cooking of the cooking appliance 300.

[0103] Understandably, Figure 2 The rotation direction of the middle fan blade assembly 100 is clockwise, that is, the fan blade assembly 100 is a backward impeller.

[0104] like Figure 2As shown, in some embodiments, optionally, along the radial direction of the impeller 110, the end of the first end 131 of the spoiler 130 away from the center of the impeller 110 is the outer edge 133, and the length a of the line connecting the outer edge 133 and the center of the impeller 110 satisfies 90mm≤2a≤300mm.

[0105] In this embodiment, along the radial direction of the impeller 110, the end of the second end 132 of the spoiler 130 away from the center of the impeller 110 is the outer edge 133, and twice the length of the line connecting the outer edge 133 and the center of the impeller 110 is the outer diameter of the fan blade assembly 100. 2a is between 90 mm and 300 mm, which limits the value range of the outer diameter of the fan blade assembly 100, and also limits the overall size of the fan blade assembly 100, so that the fan blade assembly 100 can be miniaturized while ensuring the flow rate of the airflow generated by the fan blade assembly 100, and achieve extreme efficiency and large flow rate when space is limited, thereby realizing deep cavity cooking of the cooking utensil 300.

[0106] like Figure 2 As shown, in some embodiments, optionally, the end of any blade 120 facing the center of the impeller 110 is the blade root 121, and the length b of the line connecting the blade root 121 and the center of the impeller 110 and the length a of the line connecting the outer edge 133 and the center of the impeller 110 satisfy 0.3≤b / a≤0.8.

[0107] In this embodiment, the end of any blade 120 facing the center of the impeller 110 is the blade root 121. Specifically, the ratio of the length b of the line connecting the blade root 121 and the center of the impeller 110 to the length a of the line connecting the outer edge 133 and the center of the impeller 110 is between 0.3 and 0.8.

[0108] It is understandable that twice the length of the line connecting the blade root 121 and the center of the impeller 110 is the inner diameter of the blade assembly 100, which limits the value range of the hub ratio of the blade assembly 100. That is, 2b / 2a is between 0.3 and 0.8.

[0109] By limiting the hub ratio of the fan blade assembly 100 to between 0.3 and 0.8, the airflow rate and effective power can be increased while ensuring the radial size of the fan blade assembly 100, thereby achieving deep cavity and efficient circulation of hot air in the cooking appliance 300.

[0110] Optionally, 0.5≤b / a≤0.8.

[0111] Optionally, 0.5≤b / a≤0.7.

[0112] In some embodiments, optionally, the number Z of blades 120 satisfies 6≤Z≤12.

[0113] In this embodiment, the value range of the number of blades 120 is limited. Specifically, the number of blades 120 is between 6 and 12. This can further increase the flow rate of the airflow generated by the fan blade assembly 100, and realize the efficient circulation of hot air formed by the hot air device 200 with the fan blade assembly 100, that is, realize the efficient circulation of hot air in the deep cavity of the cooking utensil 300, improve the uniformity of heating of the food in the cooking utensil 300, and thus improve the cooking effect.

[0114] Optionally, 6≤Z≤8.

[0115] Optionally, Z=7.

[0116] Table 1

[0117]

[0118] As shown in Table 1, No. 1 is the optimal solution. No. 2, No. 3, No. 4, No. 5 and No. 6 are suboptimal solutions.

[0119] Table 2

[0120]

[0121] After the air duct performance test, it can be clearly seen from Table 2 that No. 10 is the best solution.

[0122] In some embodiments, optionally, the spoiler 130 and the blade 120 are an integral structure.

[0123] In this embodiment, the spoiler 130 and the blade 120 are defined as an integral structure. Specifically, a portion of the blade 120 is bent toward the first side 111 or the second side 112 to form the spoiler 130 .

[0124] It can be understood that the integrated structure has good mechanical properties, and thus can improve the connection strength between the spoiler 130 and the blade 120, extend the service life of the fan blade assembly 100, and ensure the output of a large flow of airflow of the fan blade assembly 100.

[0125] In addition, the integrated structure facilitates processing and production, reduces manufacturing difficulty, and improves production efficiency, thereby reducing the production cost of the fan blade assembly 100.

[0126] It is understandable that, when the spoiler 130 is fixed to the blade 120 by welding, the number of blades 120 can be increased accordingly to further increase the flow rate of the airflow generated by the fan blade assembly 100.

[0127] According to the second aspect of the utility model, a hot air device 200 is provided, including a fan blade assembly 100 as provided in any of the above embodiments, and thus has all the beneficial technical effects of the fan blade assembly 100, which will not be repeated here.

[0128] like Figure 4 As shown, further, the hot air device 200 also includes a driving member 210 and a heating pipe 220, wherein the driving member 210 is connected to the impeller 110, and the driving member 210 can drive the plurality of blades 120 to rotate through the impeller 110 to generate airflow, and at least a portion of the heating pipe 220 is located on the flow path of the airflow.

[0129] The hot air device 200 provided in the embodiment of the utility model includes a fan blade assembly 100, a driving member 210 and a heat pipe 220. Specifically, the driving member 210 is connected to the impeller 110, that is, when the driving member 210 is driven, the impeller 110 can drive the multiple blades 120 to rotate to generate airflow.

[0130] Since the spoiler 130 is provided on at least one blade 120, the overall area of ​​the plurality of blades 120 can be increased without increasing the radial dimension of the fan blade assembly 100, thereby improving the efficiency of the fan blade assembly 100 and the flow rate of the airflow generated by the fan blade assembly 100 while ensuring the miniaturization of the fan blade assembly 100.

[0131] At least a portion of the heating tube 220 is located on the flow path of the airflow, that is, the airflow will flow through the heating tube 220 during the flow process, so that the airflow is heated to form a hot airflow after passing through the heating tube 220, and the hot airflow enters the cooking cavity 311 to heat and cook the food in the cooking cavity 311.

[0132] Since the efficiency of the fan blade assembly 100 and the flow rate of the airflow generated by the fan blade assembly 100 are improved, that is, the flow rate of the hot air flow is improved, thereby achieving efficient circulation of hot air, that is, achieving efficient circulation of hot air in the deep cavity of the cooking appliance 300, improving the uniformity of heating of the food in the cooking appliance 300, and thus improving the cooking effect.

[0133] Optionally, the driving member 210 includes a motor.

[0134] According to the third aspect of the present invention, a cooking appliance 300 is provided, comprising at least two hot air devices 200 as provided in any of the above embodiments, and thus having all the beneficial technical effects of the hot air device 200, which will not be described in detail herein.

[0135] like Figure 4 and Figure 5As shown, further, the cooking appliance 300 also includes a body 310, which is provided with at least two cooking cavities 311 and at least two installation cavities 312, each cooking cavity 311 is connected to an installation cavity 312, and at least two hot air devices 200 are respectively arranged in the at least two installation cavities 312.

[0136] The cooking device 300 provided by the embodiment of the utility model comprises at least two hot air devices 200 and a body 310. Specifically, the body 310 is provided with at least two cooking cavities 311 and at least two mounting cavities 312, and each cooking cavity 311 is connected to one mounting cavity 312. The at least two hot air devices 200 are respectively arranged in the at least two mounting cavities 312.

[0137] Specifically, when the hot air device 200 starts working, the driving member 210 drives the fan blade assembly 100 to rotate to generate airflow. The airflow is heated after passing through the heating tube 220 to form a hot airflow. The hot airflow enters the cooking cavity 311 to heat and cook the food in the cooking cavity 311.

[0138] It is understandable that the cooking utensil 300 has a multi-cavity structure, so that multiple ingredients can be cooked at the same time, the cooking effect is improved, and there is no smell transfer, thus enriching the user's cooking experience.

[0139] Since the cooking appliance 300 has a multi-cavity structure and each cavity structure (cooking cavity 311 ) needs to be equipped with a hot air device 200 , the radial dimension of the fan blade assembly 100 is limited.

[0140] Since the spoiler 130 is provided on at least one blade 120, the overall area of ​​the plurality of blades 120 can be increased without increasing the radial dimension of the fan blade assembly 100, thereby ensuring the miniaturization of the fan blade assembly 100 while improving the efficiency of the fan blade assembly 100 and the flow rate of the airflow generated by the fan blade assembly 100, thereby achieving efficient circulation of hot air in the deep cavity of the cooking utensil 300, improving the uniformity of heating of the food in the cooking utensil 300, and thereby improving the cooking effect.

[0141] like Figure 4 and Figure 5 As shown, in some embodiments, optionally, the body 310 is further provided with a connecting portion 313, and each cooking cavity 311 is connected to a mounting cavity 312 through the connecting portion 313; wherein the connecting portion 313 includes a plurality of through holes or shutters.

[0142] In this embodiment, it is defined that the body 310 is also provided with a connecting portion 313. Specifically, each cooking cavity 311 is connected to an installation cavity 312 via the connecting portion 313, so that the hot air generated by the hot air device 200 can enter the cooking cavity 311 through the connecting portion 313, thereby achieving heating and cooking of the food in the cooking cavity 311.

[0143] Moreover, since a spoiler 130 is provided on at least one blade 120, the efficiency of the fan blade assembly 100 and the flow rate of the airflow generated by the fan blade assembly 100 can be improved while ensuring the miniaturization of the fan blade assembly 100, thereby achieving efficient circulation of hot air in the cooking cavity 311, thereby improving the uniformity of heating of the food in the cooking cavity 311 and improving the cooking effect.

[0144] The connecting portion 313 includes a plurality of through holes or shutters, which can be specifically arranged according to actual needs.

[0145] In some embodiments, optionally, the cooking appliance 300 includes an air fryer, an oven, a steam oven, or a microwave oven.

[0146] In this embodiment, specifically, the cooking appliance 300 includes an air fryer, an oven, a steam oven, or a microwave oven and steamer.

[0147] Specifically, when the cooking appliance 300 includes a microwave oven, it can be understood that since the microwave oven uses microwaves to heat food when working, the aperture of the through hole connecting the installation cavity 312 and the cooking cavity 311 is generally made smaller, generally less than 6 mm, to prevent microwave leakage.

[0148] By providing a spoiler 130 on at least one blade 120, the efficiency of the fan blade assembly 100 and the flow rate of the airflow generated by the fan blade assembly 100 can be improved while ensuring the miniaturization of the fan blade assembly 100. Even if the aperture of the through hole connecting the installation cavity 312 and the cooking cavity 311 is small, the deep cavity hot air efficient circulation of the microwave oven can be achieved, thereby improving the cooking effect of the microwave oven.

[0149] In the description of this specification, the terms "connection", "installation", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0150] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0151] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fan blade assembly, characterized in that: include: An impeller, wherein along the axial direction of the impeller, the impeller comprises a first side and a second side opposite to each other; A plurality of blades are provided on the impeller, and the plurality of blades are arranged along the circumference of the impeller; a spoiler, provided on at least one of the blades, wherein a first end of the spoiler is connected to the blade, and a second end of the spoiler extends toward the first side or the second side in a direction away from the blade; Along the axial direction of the impeller, a distance H between the second end of the spoiler and a side surface of the blade facing away from the spoiler satisfies 10 mm≤H≤30 mm.

2. The fan blade assembly according to claim 1, characterized in that: Along the radial direction of the impeller, the end of the first end of the spoiler away from the center of the impeller is the outer edge; The center of the impeller is taken as the center of the circle, and the circle passing through the outer edge is taken as the base circle, and the angle formed by the extension line of the connection between the first end of the spoiler and the blade and the tangent line of the base circle at the outer edge is taken as the outlet angle; Wherein, the outlet angle α satisfies 61°≤α≤81°.

3. The fan blade assembly according to claim 1, characterized in that: Along the radial direction of the impeller, the end of the first end of the spoiler away from the center of the impeller is an outer edge, and the length a of the line connecting the outer edge and the center of the impeller satisfies 90mm≤2a≤300mm.

4. The fan blade assembly according to claim 3, characterized in that: The end of any blade facing the center of the impeller is a blade root, and the length b of a line connecting the blade root and the center of the impeller and the length a of a line connecting the outer edge and the center of the impeller satisfy 0.3≤b / a≤0.

8.

5. The fan blade assembly according to any one of claims 1 to 4, characterized in that: The number Z of the blades satisfies 6≤Z≤12.

6. The fan blade assembly according to any one of claims 1 to 4, characterized in that: The spoiler and the blade are an integral structure.

7. A hot air device, characterized in that: include: The fan blade assembly according to any one of claims 1 to 6; A driving member connected to the impeller, the driving member can drive the plurality of blades to rotate through the impeller to generate airflow; A heating pipe, at least a portion of which is located on the flow path of the airflow.

8. A cooking utensil, characterized in that: include: At least two hot air devices as claimed in claim 7; The machine body is provided with at least two cooking cavities and at least two installation cavities, each of the cooking cavities is communicated with one of the installation cavities, and at least two of the hot air devices are respectively arranged in the at least two installation cavities.

9. The cooking device according to claim 8, characterized in that: The machine body is also provided with a connecting portion, and each of the cooking cavities is connected with one of the installation cavities through the connecting portion; Wherein, the connecting portion includes a plurality of through holes or shutters.

10. The cooking device according to claim 8 or 9, characterized in that: The cooking appliance includes an air fryer, an oven, a steam oven or a microwave oven.

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