Impeller assembly, fan and cooking utensil

Abstract

The invention provides an impeller assembly, a draught fan and a cooking utensil, the impeller assembly can be driven by a motor to rotate, the impeller assembly comprises a blade disc, the blade disc is provided with a shaft hole, and the shaft hole is detachably connected with a driving shaft of the motor; the multiple blades are arranged in the circumferential direction of the blade disc at intervals, a part of any blade inclines in the first direction, and the first direction is the direction opposite to the air outlet direction when the impeller assembly rotates in the forward direction. According to the fan, one part of any blade is inclined in the direction opposite to the air outlet direction deviating from the impeller assembly, so that the efficiency of the impeller assembly can be improved, the performance of the fan can meet the use requirement without being driven by a high-rotating-speed motor, and the problem that the noise of the motor is large is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of household electrical appliance equipment, in particular to a impeller assembly, a fan and a cooking utensil. BACKGROUND

[0002] At present, cooking utensils have a development trend of miniaturization, which leads to the continuous compression of the electrical appliance containing space of the cooking utensil, the reduction of the electrical appliance containing space, and the placement of the fan in the electrical appliance containing space in the cooking utensil. Therefore, the impeller in the fan needs to be designed to be small in size. The small-size impeller in the related art has the problem of low efficiency, and since the small-size impeller needs to be driven by a high-speed motor, it also has the problem of high noise. SUMMARY

[0003] The present application aims to at least solve one of the problems in the prior art or related art.

[0004] To this end, the first object of the present application is to provide an impeller assembly.

[0005] The second object of the present application is to provide a fan.

[0006] The third object of the present application is to provide a cooking utensil.

[0007] To achieve at least one of the above objects, according to a first aspect of the present application, an impeller assembly is provided, which can be rotated under the driving of a motor. The impeller assembly comprises: a disc having a shaft hole, the shaft hole being detachably connected with a driving shaft of the motor; and a plurality of blades, the plurality of blades being arranged at intervals along the circumference of the disc, a portion of any blade being inclined toward a first direction, the first direction being opposite to the direction of air outlet when the impeller assembly rotates in a forward direction.

[0008] The impeller assembly provided in the present application can be used in a fan. The impeller assembly can be connected with a motor of the fan, and the motor can drive the impeller assembly to rotate to generate airflow. The impeller assembly comprises a disc and a plurality of blades. The disc has a shaft hole for connecting with a driving shaft of the motor. The shaft hole is detachably connected with the driving shaft of the motor, and the motor can drive the disc to rotate through the driving shaft. The plurality of blades are connected to the disc and arranged at intervals along the circumference of the disc. When the disc is driven to rotate by the motor, the disc drives the plurality of blades to rotate synchronously to generate airflow.

[0009] Further, a part of any blade is inclined towards a first direction, the first direction being opposite to the air outlet direction when the impeller rotates in a positive direction. Understandably, by setting a part of any blade to be inclined towards a direction opposite to the air outlet direction away from the impeller assembly, the structure of the blade and the disc can form a backward impeller. Such structure of the impeller assembly has the advantage of high efficiency compared to other impeller forms, and the performance of the fan can meet the use requirements without the need of a high-speed motor, thereby avoiding the problem of large motor noise.

[0010] By setting a part of any blade to be inclined towards a direction opposite to the air outlet direction away from the impeller assembly, the efficiency of the impeller assembly can be improved, and the performance of the fan can meet the use requirements without the need of a high-speed motor, thereby avoiding the problem of large motor noise.

[0011] According to the above-mentioned impeller assembly of the present application, the following distinguished technical features can also be provided:

[0012] In some embodiments, the first end of the blade is close to the disc, the second end of the blade is away from the disc, the distance from the first end of the blade to the center of the shaft hole is D1, the distance from the second end of the blade to the center of the shaft hole is D2, and D1 and D2 satisfy 0.43≤D1 / D2≤0.46.

[0013] In this embodiment, the size parameters of the blade are further limited. The first end of the blade is close to the disc, the second end of the blade is away from the disc, the distance from the first end of the blade to the center of the shaft hole is D1, the distance from the second end of the blade to the center of the shaft hole is D2, and D1 and D2 satisfy 0.43≤D1 / D2≤0.46. Specifically, the first end of the blade defines a circular shape, i.e., the inner diameter of the blade, and the size of the inner diameter of the blade is 2xD1. The second end of the blade defines a circular shape, i.e., the outer diameter of the blade, and the size of the outer diameter of the blade is 2xD2.

[0014] By optimizing the size parameters of the blade, the ratio between the distance D1 from the first end of the blade to the center of the shaft hole and the distance D2 from the second end of the blade to the center of the shaft hole is limited to 0.43≤D1 / D2≤0.46, which can effectively improve the wind pressure and flow of the impeller assembly, and further improve the preheating time of the cooking appliance using the impeller assembly, thereby improving the cooking efficiency.

[0015] In some embodiments, the angle of the outlet angle of the blade is α, and α satisfies 72°<α<90°.

[0016] In the technical solution, the size parameter of the blade is limited, and the angle of the outlet angle of the blade is a, and a satisfies 72° < a < 90°. Specifically, by optimizing the design of the size parameter of the blade, the angle a of the outlet angle of the blade can be 72° to 73°, so as to effectively improve the wind pressure of the impeller assembly and the airflow velocity generated by the impeller assembly, improve the efficiency and exhaust speed of the fan, and then improve the heating efficiency of the cooking utensil used by the fan, and improve the heating uniformity of the cooking utensil.

[0017] In some technical solutions, optionally, the height of the impeller assembly is h, and h satisfies 15mm < h < 20mm.

[0018] In the technical solution, the height of the impeller assembly is further limited. The height of the impeller assembly is h, and h satisfies 15mm < h < 20mm. The height value of the impeller assembly in this value range is matched with the outlet angle of the blade and the size of the blade, so as to effectively improve the wind pressure and flow of the impeller assembly, improve the efficiency and exhaust speed of the fan, and then improve the heating efficiency of the cooking utensil used by the fan, and improve the heating uniformity of the cooking utensil.

[0019] In some technical solutions, optionally, the number of blades is Z, Z is an integer, and Z satisfies 8 ≤ Z ≤ 9.

[0020] In the technical solution, the number of blades is limited, and the number of blades is Z, Z is an integer, and Z satisfies 8 ≤ Z ≤ 9. Specifically, the number of blades can be 8 or 9, which is matched with the value range of the inlet angle of the blade, the size of the blade and the height of the impeller assembly, so as to effectively improve the wind pressure and flow of the impeller assembly, improve the efficiency and exhaust speed of the fan, and then improve the heating efficiency of the cooking utensil used by the fan, and improve the heating uniformity of the cooking utensil.

[0021] In some technical solutions, optionally, D2 satisfies 110mm ≤ 2×D2 ≤ 120mm.

[0022] In the technical solution, the size of the impeller assembly is further limited. The second end of the blade away from the blade disc is the second end of the blade, and the distance from the second end of the blade to the center of the shaft hole is D2, that is, the outer diameter size of the blade is 2×D2, and the outer diameter size of the impeller assembly is 2×D2. Specifically, D2 satisfies 110mm ≤ 2×D2 ≤ 120mm, that is, the outer diameter size of the impeller assembly ranges from 110mm to 120mm, so as to miniaturize the impeller assembly, so that the impeller assembly can be applied to more cooking utensils, and is beneficial to the miniaturization design of the cooking utensil.

[0023] In some technical solutions, optionally, the plurality of blades are uniformly distributed along the circumference of the blade disc.

[0024] In the technical solution, the blade is further limited. Specifically, the plurality of blades are uniformly distributed along the circumference of the blade disc. In this way, when the blade disc drives the blade to rotate, a uniform airflow can be generated due to the uniform distribution of the plurality of blades along the circumference of the blade disc.

[0025] The second aspect of the present application also provides a fan, which comprises the impeller assembly provided in the first aspect of the present application.

[0026] The fan provided in the second aspect of the present application has all the beneficial effects of the impeller assembly.

[0027] In some technical solutions, the fan further comprises a volute having an air outlet, the blade disc and the blade of the impeller assembly are located in the volute, and the air outlet is used to discharge the airflow generated by the impeller assembly.

[0028] In the technical solution, the fan is further limited, and the fan further comprises a volute, the blade disc and the blade of the impeller assembly are located in the volute, and the volute can protect the impeller assembly. The impeller assembly can generate an airflow when rotating, the volute is provided with an air outlet, and the air outlet is used to discharge the airflow generated by the impeller assembly.

[0029] In some technical solutions, the fan further comprises a motor comprising a driving shaft, the driving shaft is connected to the shaft hole of the impeller assembly, and the motor is used to drive the impeller assembly to rotate.

[0030] In the technical solution, the structure of the fan is further limited. The fan further comprises a motor, and the motor is used to drive the impeller assembly to rotate to generate an airflow. Specifically, the motor comprises a driving shaft, the driving shaft is connected to the shaft hole of the impeller assembly, the driving shaft is detachably connected to the impeller assembly, the motor is used to drive the impeller assembly to rotate, and then an airflow is generated.

[0031] The third aspect of the present application also provides a cooking appliance, which comprises the fan provided in the second aspect of the present application.

[0032] The cooking appliance provided in the third aspect of the present application has all the beneficial effects of the fan.

[0033] The cooking appliance comprises an oven, a microwave oven, a microwave oven, or an air fryer.

[0034] Additional aspects and advantages of the present application will become apparent from the following description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0035] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the accompanying drawings, in which:

[0036] Figure 1 Fig. 1 shows a structural schematic diagram of an impeller assembly according to an embodiment of the present application;

[0037] Figure 2 Fig. 2 shows another structural schematic diagram of an impeller assembly according to an embodiment of the present application;

[0038] Figure 3 Fig. 3 shows a third structural schematic diagram of an impeller assembly according to an embodiment of the present application;

[0039] wherein, Figures 1 to 3 The correspondence between the reference signs and the component names is as follows:

[0040] 100, impeller assembly; 110, impeller disc; 111, shaft hole; 120, blade. DETAILED DESCRIPTION

[0041] In order to enable a clearer understanding of the above-mentioned objects, features and advantages of the present application, the present application will be further described below in conjunction with the accompanying drawings and specific embodiments. 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.

[0042] In the following description, a large number of specific details are set forth in order to facilitate a thorough understanding of the present application, however, the present application can also be implemented in other ways different from those described herein, and therefore, the scope of protection of the present application is not limited by the specific embodiments disclosed below.

[0043] The following will be described with reference to Figures 1 to 3 An impeller assembly 100, a fan and a cooking appliance provided according to some embodiments of the present application are described.

[0044] In an embodiment according to the present application, as Figure 1 , Figure 2 and Figure 3 An impeller assembly 100 is provided according to the present application, the impeller assembly 100 is capable of rotating under the driving of a motor, and the impeller assembly 100 comprises: an impeller disc 110, provided with a shaft hole 111, the shaft hole 111 is detachably connected with a driving shaft of the motor; a plurality of blades 120, the plurality of blades 120 are arranged at intervals along the circumference of the impeller disc 110, a part of any blade 120 is inclined towards a first direction, the first direction is a direction opposite to the air outlet direction when the impeller assembly 100 rotates in a forward direction.

[0045] The impeller assembly 100 proposed in this application can be used in a fan. The impeller assembly 100 can be connected to the fan's motor, and the motor can drive the impeller assembly 100 to rotate to generate airflow. The impeller assembly 100 includes an impeller disk 110 and a plurality of blades 120. The impeller disk 110 has a shaft hole 111 for connecting to the drive shaft of the motor. The shaft hole 111 is detachably connected to the drive shaft of the motor, and the motor can drive the impeller disk 110 to rotate via the drive shaft. The plurality of blades 120 are connected to the impeller disk 110 and are spaced apart circumferentially along the impeller disk 110. When the motor drives the impeller disk 110 to rotate, the impeller disk 110 drives the plurality of blades 120 to rotate synchronously to generate airflow.

[0046] Furthermore, a portion of any blade 120 is tilted towards a first direction, which is opposite to the airflow direction when the impeller rotates forward. The forward rotation direction of the impeller assembly is as follows: Figure 2 As shown. Understandably, by setting a portion of any blade 120 to be tilted in the opposite direction to the airflow direction away from the impeller assembly 100, the impeller disk 110 and the blade 120 can form a backward impeller structure. This type of impeller assembly 100 has the advantage of high efficiency compared to other impeller types, and the performance of the fan can meet the usage requirements without the need for a high-speed motor, thus avoiding the problem of high motor noise.

[0047] By setting a portion of any blade 120 to tilt in the opposite direction to the air outlet direction of the impeller assembly 100, the efficiency of the impeller assembly 100 can be improved. The performance of the fan can meet the usage requirements without the need for a high-speed motor, thus avoiding the problem of high motor noise.

[0048] In some embodiments, optionally, such as Figure 2 As shown, the end of the blade 120 closest to the bladed disk 110 is the first end of the blade 120, and the end of the blade 120 away from the bladed disk 110 is the second end of the blade 120. The distance from the first end of the blade 120 to the center of the shaft hole 111 is D1, and the distance from the second end of the blade 120 to the center of the shaft hole 111 is D2. D1 and D2 satisfy 0.43≤D1 / D2≤0.46.

[0049] In this embodiment, the size parameters of the blades 120 are further limited. The first end of the blade 120 is close to the impeller disc 110, the second end of the blade 120 is away from the impeller disc 110, the distance from the first end of the blade 120 to the center of the shaft hole 111 is D1, the distance from the second end of the blade 120 to the center of the shaft hole 111 is D2, and D1 and D2 satisfy 0.43≤D1 / D2≤0.46. Specifically, the first end of the plurality of blades 120 defines a circular shape, i.e., the inner diameter of the blade 120, and the size of the inner diameter of the blade 120 is 2×D1; the second end of the plurality of blades 120 defines a circular shape, i.e., the outer diameter of the blade 120, and the size of the outer diameter of the blade 120 is 2×D2.

[0050] By optimizing the size parameters of the blades 120, the ratio between the distance D1 from the first end of the blade 120 to the center of the shaft hole 111 and the distance D2 from the second end of the blade 120 to the center of the shaft hole 111 is limited to 0.43≤D1 / D2≤0.46, which can effectively improve the wind pressure and flow rate of the impeller assembly 100, thereby improving the preheating time of the cooking appliance used by the impeller assembly 100 and improving the cooking efficiency.

[0051] In some embodiments, as shown in FIG. 12, the outlet angle of the blade 120 is α, and α satisfies 72°<α<90°. Figure 2

[0052] In this embodiment, the size parameters of the blades 120 are limited, and the angle of the outlet angle of the blade 120 is α, which satisfies 72°<α<90°. Specifically, by optimizing the size parameters of the blade 120, the angle α of the outlet angle of the blade 120 can be 72° to 73°, which can effectively improve the wind pressure of the impeller assembly 100 and the flow rate of the airflow generated by the impeller assembly 100, improve the efficiency and exhaust speed of the fan, and thereby improve the heating efficiency of the cooking appliance used by the fan and improve the heating uniformity of the cooking appliance.

[0053] In some embodiments, as shown in FIG. 12, the height of the impeller assembly 100 is h, and h satisfies 15mm<h<20mm. Figure 3

[0054] In this embodiment, the height of the impeller assembly 100 is further limited. The height of the impeller assembly 100 is h, and h satisfies 15mm<h<20mm. The height value of the impeller assembly 100 in this value range is matched with the outlet angle of the blade 120 and the size of the blade 120, which can effectively improve the wind pressure and flow rate of the impeller assembly 100, improve the efficiency and exhaust speed of the fan, and thereby improve the heating efficiency of the cooking appliance used by the fan and improve the heating uniformity of the cooking appliance. ​​

[0055] In some embodiments, optionally, the number of the blades 120 is Z, Z is an integer, and Z satisfies 8≤Z≤9.

[0056] In this embodiment, the number of the blades 120 is limited, and the number of the blades 120 is Z, Z is an integer, and Z satisfies 8≤Z≤9. Specifically, the number of the blades 120 can be 8 or 9, which is adapted to the range of the inlet angle of the blades 120, the size of the blades 120, and the height of the impeller assembly 100, and can effectively improve the wind pressure and flow of the impeller assembly 100, improve the efficiency and exhaust speed of the fan, and thus improve the heating efficiency of the cooking utensil to which the fan is applied, and improve the heating uniformity of the cooking utensil.

[0057] In some embodiments, optionally, D2 satisfies 110mm≤2×D2≤120mm.

[0058] In this embodiment, the size of the impeller assembly 100 is further limited. The end of the blade 120 away from the blade disc 110 is the second end of the blade 120, and the distance from the second end of the blade 120 to the center of the shaft hole 111 is D2, that is, the outer diameter size of the blade 120 is 2×D2, and the outer diameter size of the impeller assembly 100 is 2×D2. Specifically, D2 satisfies 110mm≤2×D2≤120mm, that is, the range of the outer diameter size of the impeller assembly 100 is 110mm to 120mm, so as to miniaturize the impeller assembly 100, and make the impeller assembly 100 applicable to more cooking utensils, which is conducive to the miniaturization design of the cooking utensil.

[0059] In some embodiments, optionally, the plurality of blades 120 are uniformly distributed along the circumference of the blade disc 110.

[0060] In this embodiment, the blade 120 is further limited. Specifically, the plurality of blades 120 are uniformly distributed along the circumference of the blade disc 110. In this way, in the case that the blade disc 110 drives the blade 120 to rotate, since the plurality of blades 120 are uniformly distributed along the circumference of the blade disc 110, a uniform airflow can be generated.

[0061] The second aspect of the present application also proposes a fan, which comprises the impeller assembly 100 proposed in the first aspect of the present application.

[0062] The fan provided in the second aspect of the present application has all the beneficial effects of the impeller assembly 100 because it comprises the impeller assembly 100 proposed in the first aspect of the present application.

[0063] In some embodiments, optionally, the fan further comprises: a volute having an air outlet, the blade disc 110 and the blade 120 of the impeller assembly 100 are located in the volute, and the air outlet is used to discharge the airflow generated by the impeller assembly 100.

[0064] In this embodiment, the fan is further limited. The fan further comprises a volute, the impeller assembly 100 is located in the volute, and the volute is capable of protecting the impeller assembly 100. The impeller assembly 100 is capable of generating airflow in rotation, and the volute is provided with an air outlet for discharging the airflow generated by the impeller assembly 100.

[0065] In some embodiments, the fan optionally further comprises a motor, the motor comprises a driving shaft connected to the shaft hole 111 of the impeller assembly 100, and the motor is used to drive the impeller assembly 100 to rotate.

[0066] In this embodiment, the structure of the fan is further limited. The fan further comprises a motor, the motor is used to drive the impeller assembly 100 to rotate to generate airflow. Specifically, the motor comprises a driving shaft connected to the shaft hole 111 of the impeller assembly 100, the driving shaft is detachably connected to the impeller assembly 100, the motor is used to drive the impeller assembly 100 to rotate, thereby generating airflow.

[0067] The third aspect of the present application also provides a cooking appliance comprising the fan according to the second aspect of the present application.

[0068] The cooking appliance according to the third aspect of the present application has all the beneficial effects of the fan according to the second aspect of the present application.

[0069] The cooking appliance comprises an oven, a microwave oven, a microwave oven, or an air fryer.

[0070] In a possible embodiment, the impeller assembly 100 according to the present application comprises a fan blade (i.e. the blade 120), the outer diameter of the fan blade is 2xD2, the value of the outer diameter of the fan blade is 110mm to 120mm, and the impeller assembly 100 is a small impeller. The value of the impeller outlet angle (i.e. the angle of the outlet angle) a is 72° to 90°, and the form of the impeller assembly 100 is a backward impeller. The first end of the fan blade is close to the hub 110, the second end of the fan blade is away from the hub 110, the distance from the first end of the fan blade to the center of the shaft hole 111 is D1, the distance from the second end of the fan blade to the center of the shaft hole 111 is D2, the hub ratio ratio = D1 / D2, and the value of the hub ratio is 0.43 to 0.46. The number of fan blades is Z, the value of Z is 8 to 9, the height of the impeller assembly 100 is h, and the value of h is 15mm to 20mm. The impeller assembly 100 is formed by sheet metal blanking and sheet metal bending.

[0071] In this invention, the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0072] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," 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 present 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.

[0073] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An impeller assembly, characterized in that, The impeller assembly is capable of rotating under the drive of a motor, and the impeller assembly includes: The impeller has a shaft hole, which is detachably connected to the drive shaft of the motor; Multiple blades are arranged at circumferential intervals along the impeller disk, and a portion of any blade is inclined toward a first direction, which is opposite to the air outlet direction when the impeller assembly rotates forward.

2. The impeller assembly according to claim 1, characterized in that, The end of the blade closest to the bladed disk is the first end of the blade, and the end of the blade away from the bladed disk is the second end of the blade. The distance from the first end of the blade to the center of the shaft hole is D1, and the distance from the second end of the blade to the center of the shaft hole is D2. D1 and D2 satisfy 0.43≤D1 / D2≤0.

46.

3. The impeller assembly according to claim 1, characterized in that, The exit angle of the blade is α, where α satisfies 72° < α < 90°.

4. The impeller assembly according to claim 1, characterized in that, The height of the impeller assembly is h, where h satisfies 15mm < h < 20mm.

5. The impeller assembly according to claim 1, characterized in that, The number of blades is Z, where Z is an integer and Z satisfies 8≤Z≤9.

6. The impeller assembly according to claim 2, characterized in that, D2 satisfies 110mm≤2×D2≤120mm.

7. The impeller assembly according to any one of claims 1 to 6, characterized in that, The multiple blades are evenly distributed along the circumference of the bladed disk.

8. A fan, characterized in that, include: The impeller assembly as described in any one of claims 1 to 7.

9. The fan according to claim 8, characterized in that, Also includes: The volute has an air outlet, and the impeller disk and blades of the impeller assembly are located inside the volute. The air outlet is used to discharge the airflow generated by the impeller assembly.

10. The fan according to claim 8, characterized in that, Also includes: An electric motor, including a drive shaft connected to a shaft hole of the impeller assembly, is used to drive the impeller assembly to rotate.

11. A cooking utensil, characterized in that, include: The fan as described in any one of claims 8 to 10.

12. The cooking utensil according to claim 11, characterized in that, The cooking appliance includes any one of an oven, a microwave oven, or an air fryer.

Images