An air flow generator

Abstract

The present invention discloses an airflow generator, comprising: an airflow inlet part and a motor part; the airflow inlet part comprises a vortex casing, an impeller and an air guide wheel; the impeller is located at a first side of the air guide wheel, and the vortex casing is arranged on the outer sides of the impeller and the air guide wheel; a first fluid channel is provided between the second side of the impeller and the first side of the air guide wheel; the air guide wheel is provided with a first air guide hole; an air guide vane is provided on the outer side of the air guide wheel, and the air guide vane and the vortex casing form a second fluid channel; the motor part comprises a motor bracket and a motor body; the motor body comprises a motor bearing and a motor winding; a motor bearing cavity is provided at the axial center position of the motor bracket, an overlapping portion is provided on the outer side of the motor bearing cavity, and a second air guide hole is provided on the first side of the overlapping portion; the first air guide hole and the second air guide hole form a third fluid channel, so as to improve the heat dissipation efficiency of the airflow generator.

Description

Technical Field

[0001] The present invention relates to the field of electromechanical technology, and in particular to an airflow generator. Background Art

[0002] In some electrical appliances that need to provide suction to work, the airflow generator is a core component. Common examples include vacuum cleaners, sweeping robots, etc. The principle of the airflow generator is to generate negative pressure by driving the impeller to rotate at high speed through the motor, thereby generating suction for the fluid. On the other hand, after the fluid is sucked into the airflow generator, the flow of the fluid can also be used to dissipate heat for the various components of the motor.

[0003] In the prior art, the structure of the airflow generator is as follows: Figure 1 As shown in the figure. Under the action of suction, the fluid enters the air flow generator from the air inlet and flows along Figure 1 It flows in the direction of the arrow. It can be seen that the fluid will pass through the gap between the guide wheel and the motor cover, pass through the outside of the motor winding, and then be discharged from the motor drive board. In this process, the fluid can help the motor winding to dissipate heat.

[0004] However, the defect of the prior art is that, due to the flow path of the fluid, only the outer side of the motor winding can fully dissipate the heat. The inner side of the motor winding and other components of the motor cannot be effectively dissipated. It can be seen that the heat dissipation efficiency of the above structure is relatively low, which easily leads to excessively high temperature inside the airflow generator. Summary of the invention

[0005] The invention provides an airflow generator, which improves the heat dissipation effect by improving the internal structure.

[0006] The airflow generator provided by the present invention comprises: an airflow introduction part and a motor part;

[0007] The airflow introduction part comprises a volute, an impeller and an air guide wheel; the impeller is located on a first side of the air guide wheel, and the volute is sleeved on the outer sides of the impeller and the air guide wheel; a first fluid channel is provided between the second side of the impeller and the first side of the air guide wheel; the air guide wheel is provided with a first air guide hole; an air guide vane is provided on the outer side of the air guide wheel, and the air guide vane and the volute form a second fluid channel;

[0008] The motor part includes a motor bracket and a motor body; the motor body includes a motor bearing and a motor winding; a motor bearing cavity is provided at the axial center position of the motor bracket, a lap joint is provided at the outer side of the motor bearing cavity, and a second air guide hole is provided on the first side of the lap joint; the first air guide hole and the second air guide hole form a third fluid channel.

[0009] Preferably, a first fluid channel is provided between the second side of the impeller and the first side of the wind guide wheel, specifically:

[0010] A gap is provided between the second side of the impeller and the first side of the guide wheel, and the first fluid channel is formed by utilizing the gap.

[0011] Preferably, the outer side of the wind guide wheel is provided with a wind guide piece specifically comprising:

[0012] The outer wall surface of the wind guide wheel is provided with a plurality of wind guide blades at equal intervals.

[0013] Preferably, the air guide plate and the volute form a second fluid channel specifically as follows:

[0014] The adjacent air guide plates and the volute casing enclose each other to form the second fluid channel.

[0015] Preferably, the air guide plate and the volute form a second fluid channel specifically as follows:

[0016] The second end of the second fluid channel is located at the first end of the motor winding;

[0017] The first end of the motor winding is provided with an air guide assembly.

[0018] Preferably, the third fluid channel formed by the first air guide hole and the second air guide hole is specifically:

[0019] The air guide wheel sleeve is installed on the first side of the overlapping portion, and the first air guide hole and the second air guide hole are located opposite to each other, so that the first air guide hole and the second air guide hole form a third fluid channel.

[0020] Preferably, the overlapping portion is specifically:

[0021] An air guide groove is provided on the second side of the overlapping portion, and the air guide groove enables the second fluid channel to communicate with the third fluid channel.

[0022] Preferably, the motor unit further comprises: a motor drive board;

[0023] The motor bracket also includes a bracket body, a first connecting column and a second connecting column; the motor body is fixed to the bracket body through the first connecting column; the motor drive plate is fixed to the second side of the bracket body through the second connecting column; the motor bearing cavity is arranged at the axial center position of the bracket body; the motor bearing is placed in the motor bearing cavity, and the first section end of the motor bearing passes through the impeller.

[0024] The airflow generator provided by the present invention improves the structure of the airflow generator and sets a first fluid channel, a second fluid channel and a third fluid channel, so that the fluid can fully dissipate the heat on the inner and outer sides of the motor winding 222, and at the same time can achieve heat dissipation for other parts such as the outer wall of the motor body 22, the motor drive plate 24 and the motor bearing cavity 211, thereby improving the heat dissipation efficiency of the airflow generator.

[0025] The further effects of the above-mentioned non-conventional preferred manner will be described below in conjunction with specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the existing technical solutions, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0027] Figure 1 It is a structural schematic diagram of an airflow generator in the prior art;

[0028] Figure 2 A schematic diagram of the structure of an airflow generator provided in one embodiment of the present invention;

[0029] Figure 3 A schematic diagram of the structure of an airflow generator provided in one embodiment of the present invention;

[0030] Figure 4 A schematic structural diagram of an airflow introduction portion in an airflow generator provided in one embodiment of the present invention;

[0031] Figure 5 A schematic structural diagram of an air guide wheel in an air flow generator provided in one embodiment of the present invention;

[0032] Figure 6 A schematic diagram of the structure of a motor bracket in an airflow generator provided in one embodiment of the present invention;

[0033] Figure 7 A schematic diagram of the structure of a motor bracket in an airflow generator provided in one embodiment of the present invention;

[0034] Figure 8 A schematic diagram of fluid flow in an air flow generator provided in one embodiment of the present invention;

[0035] Fig. 9 A schematic diagram of fluid flow in an airflow generator provided in one embodiment of the present invention.

[0036] Among them, the reference numerals in the figure are:

[0037]

[0038] DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] In the prior art, the structure of the airflow generator is as follows: Figure 1 As shown in the figure, the fluid enters the air flow generator from the air inlet under the action of suction. Figure 1 In the air flow generator shown, there is only one fluid channel, namely along Figure 1 The fluid will flow in the direction of the arrow. That is, the fluid will pass through the gap between the guide wheel and the motor cover, pass through the outside of the motor winding, and then be discharged from the motor drive board. In this process, the fluid flows through the outside of the motor winding, which can help the motor winding dissipate heat.

[0041] However, the defect of the prior art is that, due to the flow path of the fluid, only the outer side of the motor winding can fully dissipate the heat. The inner side of the motor winding and other components of the motor cannot be effectively dissipated. It can be seen that the heat dissipation efficiency of the above structure is relatively low, which easily leads to excessively high temperature inside the airflow generator.

[0042] In view of this, the present invention provides an airflow generator, which improves the heat dissipation effect by improving the internal structure.

[0043] See also Figure 2-9 As shown in the figure, it is a specific embodiment of the airflow generator provided by the present invention. In this embodiment, the airflow generator includes an airflow inlet portion 01 and a motor portion 02. Specifically, the airflow inlet portion 01 may include a vortex casing 11, an impeller 12 and an air guide wheel 13; the motor portion 02 may include a motor bracket 21 and a motor body 22, and may also include a motor cover 23 and a motor drive plate 24. Figure 2-3 shown.

[0044] See also Figure 4 As shown, the impeller 12 is located on the first side of the guide wheel 13. Figure 3 As shown, the first side of the wind guide wheel 13 is the upper side of the wind guide wheel 13. The volute 11 is sleeved on the outer sides of the impeller 12 and the wind guide wheel 13.

[0045] It should be noted that, in this embodiment, a first fluid channel is provided between the second side of the impeller 12 and the first side of the wind guide wheel 13. Figure 4 As shown. The second side of the impeller 12, Figure 4 That is, below the impeller 12. Different from Figure 1 In the prior art shown in FIG. 1 , an impeller and an air guide wheel are fitted together. In the airflow generator provided in this embodiment, a gap is provided between the second side of the impeller 12 and the first side of the air guide wheel 13, and the first fluid channel is formed by utilizing the gap.

[0046] The structure of the wind guide wheel 13 is as follows: Figure 5 As shown. The wind guide wheel 13 is provided with a first wind guide hole a. The outer side of the wind guide wheel is provided with a wind guide vane 132. Specifically, the outer wall surface of the wind guide wheel 13 is provided with a plurality of wind guide vanes 132 at equal intervals. The wind guide vanes 132 and the volute 11 form a second fluid channel, that is, two adjacent wind guide vanes 132 will enclose together with the volute 11 to form a cavity, namely, the second fluid channel.

[0047] like Figure 2 As shown, the motor body 22 includes a motor bearing 221 and a motor winding 222. A motor bearing cavity 211 is provided at the axial center of the motor bracket 21. An overlap portion 212 is provided on the outer side of the motor bearing cavity 211.

[0048] like Figure 6 As shown, the motor bracket 21 also includes a bracket body 213, a first connecting column 214 and a second connecting column 215. The motor body 22 is fixed to the bracket body 213 through the first connecting column 214. The motor drive board 24 is fixed to the second side (i.e., Figure 2 The motor bearing cavity 211 is arranged at the axial center of the support body 213. The motor bearing 221 is placed in the motor bearing cavity 211. The first end portion of the motor bearing 221 (i.e. Figure 2 The upper end of the impeller 12 passes through the impeller 12, so that the motor can drive the impeller 12 to rotate.

[0049] The first side (i.e. Figure 2 The first air guide hole a and the second air guide hole b are provided above the overlapped portion 212; the first air guide hole a and the second air guide hole b form a third fluid channel. Specifically, the air guide wheel 13 is installed on the first side of the overlapped portion 212, and the first air guide hole a and the second air guide hole b are located opposite to each other, so that the first air guide hole a and the second air guide hole b form a third fluid channel. Figure 4In addition, a wind guide groove 216 is provided on the second side of the overlap portion 212, and the wind guide groove 216 connects the second fluid channel with the third fluid channel. Figure 7 shown.

[0050] It should be noted that in the airflow generator with the above structure, when the impeller 12 rotates to cause fluid to be sucked in, the flow of the fluid in the airflow generator is as follows: Figure 8-9 As shown by the arrow in the middle, the sucked fluid A will first enter the first fluid channel, and then split into fluid B and fluid C at the position of the guide wheel 13.

[0051] The fluid C will enter the second fluid channel and flow toward the second direction of the airflow generator (i.e., downward as shown in the figure). The second end ( Fig. 9 ), may be located at the first end ( Fig. 9 The upper end shown in FIG. 2 ). That is, the flow direction of the fluid C is directly opposite to the first end of the motor winding 222. Preferably, the first end of the motor winding 222 is provided with an air guide component ( Fig. 9 The fluid C is further divided and flows through the inner and outer sides of the motor winding 222. The divided flow graph C will be discharged from the airflow generator through the motor drive plate 24.

[0052] In addition, fluid B will enter the third fluid channel, that is, pass through the first air guide hole a, the second air guide hole b in sequence, and continue to the second direction of the air flow generator (i.e. Fig. 9 , that is, flows through the inside of the motor winding 222. Finally, it is discharged from the airflow generator via the motor drive plate 24.

[0053] It is understandable that the above-mentioned fluid flow mode can not only dissipate heat for the outer side of the motor winding 222 as in the prior art. At the same time, the fluid B and part of the fluid C flowing through the inner side of the motor winding 222 can dissipate heat for the inner side of the motor winding 222, the outer wall of the motor body 22 and the motor drive plate 24. When the fluid B flows in the third fluid channel, it can also dissipate heat for the motor bearing cavity 211. Thereby, the heat dissipation effect of the airflow generator is improved.

[0054] Preferably, the second end of the motor housing 23 (i.e. Fig. 9 The bottom end shown in FIG. 2 may be connected to the second end ( Fig. 9 The lower end shown in FIG) is extended, thereby increasing the second end of the airflow generator ( Fig. 9 The space between the lower end (shown in FIG. 1 ) and the flow path length of the fluid C. The fluid C can be in more complete contact with the outside of the motor winding 222, further improving the heat dissipation effect.

[0055] In this embodiment, after the motor cover 23 is extended, its second end does not exceed the motor drive board 24. At this time, the fluid C flowing through the outer side of the motor winding 222 can also achieve heat dissipation for the motor drive board 24.

[0056] It can be seen from the above technical scheme that the beneficial effects of this embodiment are: by improving the structure of the airflow generator, a first fluid channel, a second fluid channel and a third fluid channel are set up, so that the fluid can fully dissipate the heat on the inner and outer sides of the motor winding 222, and at the same time can achieve heat dissipation for other parts such as the outer wall of the motor body 22, the motor drive plate 24 and the motor bearing cavity 211, thereby improving the heat dissipation efficiency of the airflow generator.

[0057] Those skilled in the art will appreciate that the embodiments of the present invention may be provided as methods or computer program products. Therefore, the present invention may be implemented in the form of a complete hardware embodiment, a complete software embodiment, or a combination of software and hardware.

[0058] The various embodiments of the present invention are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0059] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0060] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. An airflow generator, characterized in that: include: An air flow introduction part and a motor part; The airflow introduction part comprises a volute, an impeller and an air guide wheel; the impeller is located on a first side of the air guide wheel, and the volute is sleeved on the outer sides of the impeller and the air guide wheel; a first fluid channel is provided between the second side of the impeller and the first side of the air guide wheel; the air guide wheel is provided with a first air guide hole; an air guide vane is provided on the outer side of the air guide wheel, and the air guide vane and the volute form a second fluid channel; The motor part includes a motor bracket and a motor body; the motor body includes a motor bearing and a motor winding; a motor bearing cavity is provided at the axial center of the motor bracket, a lap joint is provided on the outer side of the motor bearing cavity, and a second air guide hole is provided on the first side of the lap joint; the first air guide hole and the second air guide hole form a third fluid channel; A first fluid channel is provided between the second side of the impeller and the first side of the wind guide wheel, specifically: A gap is provided between the second side of the impeller and the first side of the guide wheel, and the first fluid channel is formed by utilizing the gap; The air guide plate and the volute form a second fluid channel specifically as follows: The adjacent air guide blades and the volute are enclosed to form the second fluid channel; The third fluid channel formed by the first air guide hole and the second air guide hole is specifically: The air guide wheel is installed on a first side of the overlapping portion, and the first air guide hole and the second air guide hole are located opposite to each other, so that the first air guide hole and the second air guide hole form a third fluid channel.

2. The airflow generator according to claim 1, characterized in that: The outer side of the wind guide wheel is provided with a wind guide piece, which is specifically: The outer wall surface of the wind guide wheel is provided with a plurality of wind guide vanes at equal intervals.

3. The airflow generator according to claim 1, characterized in that: The air guide plate and the volute form a second fluid channel specifically as follows: The second end of the second fluid channel is located at the first end of the motor winding; The first end of the motor winding is provided with an air guide assembly.

4. The airflow generator according to claim 1, characterized in that: The overlapping portion is specifically: An air guide groove is provided on the second side of the overlapping portion, and the air guide groove enables the second fluid channel to communicate with the third fluid channel.

5. The airflow generator according to claim 1, characterized in that: The motor unit further includes: a motor drive board; The motor bracket also includes a bracket body, a first connecting column and a second connecting column; the motor body is fixed to the bracket body through the first connecting column; the motor drive plate is fixed to the second side of the bracket body through the second connecting column; the motor bearing cavity is arranged at the axial center position of the bracket body; the motor bearing is placed in the motor bearing cavity, and the first section end of the motor bearing passes through the impeller.

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