Heat dissipation structure and cooling method of air flow generator

Abstract

The present invention discloses a heat dissipation structure and cooling method of an air flow generator, comprising: a vortex casing, an impeller, an air guide wheel and a motor bracket; the impeller is located on a first side of the air guide wheel, and the vortex casing 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 vortex casing form a second fluid channel; a motor bearing cavity is provided at the axial position of the motor bracket, an overlap 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 overlap portion; the first air guide hole and the second air guide hole form a third fluid channel, thereby improving the heat dissipation efficiency of the air flow generator.

Description

Technical Field

[0001] The present invention relates to the field of electromechanical technology, and in particular to a heat dissipation structure and a cooling method of 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 a heat dissipation structure and a cooling method of an airflow generator, which improve the heat dissipation effect by improving the internal structure.

[0006] In a first aspect, the present invention provides a heat dissipation structure of an airflow generator, comprising: a volute, an impeller, an air guide wheel and a motor bracket;

[0007] The impeller is located on a first side of the wind guide wheel, and the volute is sleeved on the outer sides of the impeller and the wind guide wheel; a first fluid channel is provided between the second side of the impeller and the first side of the wind guide wheel;

[0008] The wind guide wheel is provided with a first wind guide hole; the outer side of the wind guide wheel is provided with a wind guide vane, and the wind guide vane and the volute form a second fluid channel;

[0009] A motor bearing cavity is provided at the axial center position of the motor bracket, a lap joint is provided on the outer side of the motor bearing cavity, 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.

[0010] Preferably, a first fluid channel is provided between the second side of the impeller and the first side of the wind guide wheel, specifically:

[0011] 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.

[0012] Preferably, the outer side of the wind guide wheel is provided with a wind guide piece specifically comprising:

[0013] The outer wall surface of the wind guide wheel is provided with a plurality of wind guide blades at equal intervals.

[0014] Preferably, the air guide plate and the volute form a second fluid channel specifically as follows:

[0015] The adjacent air guide plates and the volute casing enclose each other to form the second fluid channel.

[0016] Preferably, the third fluid channel formed by the first air guide hole and the second air guide hole is specifically:

[0017] 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.

[0018] Preferably, the overlapping portion is specifically:

[0019] 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.

[0020] In a second aspect, the present invention provides a cooling method for an airflow generator, comprising:

[0021] The impeller is driven by the motor to rotate to guide the first fluid into the first fluid channel between the impeller and the guide wheel;

[0022] The air guide wheel divides the first fluid in the first fluid channel into a second fluid and a third fluid;

[0023] The second fluid enters a second fluid channel formed by the air guide vane and the volute, and cools the outer side of the motor winding through the second fluid channel;

[0024] The third fluid enters a third fluid channel formed by the first air guide hole and the second air guide hole, and the motor bearing cavity, the inner side of the motor winding and the motor drive plate are cooled through the third fluid channel.

[0025] Preferably, it also includes:

[0026] The second fluid and the third fluid are connected to each other through an air guide groove provided on the second side of the overlapping portion.

[0027] The heat dissipation structure and cooling method of the airflow generator provided by the present invention are characterized in that a first fluid channel, a second fluid channel and a third fluid channel are arranged through the heat dissipation structure, so that the fluid can fully dissipate the heat on the inner and outer sides of the motor winding, and at the same time can achieve heat dissipation of other parts such as the outer wall of the motor body, the motor drive plate and the motor bearing cavity, thereby improving the heat dissipation efficiency of the airflow generator.

[0028] 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

[0029] 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.

[0030] Figure 1 It is a structural schematic diagram of an airflow generator in the prior art;

[0031] Figure 2 A schematic diagram of a heat dissipation structure provided by an embodiment of the present invention;

[0032] Figure 3 It is a structural schematic diagram of an airflow generator involved in one embodiment of the present invention;

[0033] Figure 4 A schematic structural diagram of an air guide wheel in a heat dissipation structure provided in one embodiment of the present invention;

[0034] Figure 5 A schematic diagram of the structure of a motor bracket in a heat dissipation structure provided in an embodiment of the present invention;

[0035] Figure 6 A schematic diagram of the structure of a motor bracket in a heat dissipation structure provided in an embodiment of the present invention;

[0036] Figure 7 A schematic flow chart of a cooling method provided in one embodiment of the present invention;

[0037] Figure 8 A schematic diagram of fluid flow in a cooling method provided in one embodiment of the present invention.

[0038] Among them, the reference numerals in the figure are:

[0039] 11 Volute 12 impeller 13 Air guide wheel 21 Motor bracket 24 Motor driver board a The first air guide hole b Second air guide hole 132 Air guide 221 Motor bearings 222 Motor winding 211 Motor bearing cavity 212 Overlap 213 Bracket body 216 Air guide slot DETAILED DESCRIPTION

[0040] 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.

[0041] 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.

[0042] 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.

[0043] In view of this, the present invention provides a heat dissipation structure and a cooling method of an airflow generator, which improve the heat dissipation effect by improving the internal structure.

[0044] See also Figure 2-6 FIG. 1 is a specific embodiment of the heat dissipation structure of the airflow generator provided by the present invention. In this embodiment, the airflow generator includes a volute 11, an impeller 12, an air guide wheel 13 and a motor bracket 21. Figure 2 In addition, the overall structure of the airflow generator where the heat dissipation structure is located is as shown in Figure 3 As shown, it also includes components such as a motor body 22 and a motor drive board 24.

[0045] See also Figure 2 As shown, the impeller 12 is located on the first side of the guide wheel 13. Figure 2 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.

[0046] 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 2 As shown. The second side of the impeller 12, Figure 2 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 heat dissipation structure 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.

[0047] The structure of the wind guide wheel 13 is as follows: Figure 4 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.

[0048] like Figure 5 As shown, a motor bearing cavity 211 is provided at the axis center of the motor bracket 21. An overlap portion 212 is provided on the outer side of the motor bearing cavity 211. Figure 3 The motor bearing 221 shown in FIG. 1 is placed in the motor bearing cavity 211. The first end portion (i.e. Figure 3 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.

[0050] In addition, a wind guide groove 216 is provided on the second side of the overlap portion 212, and the wind guide groove 216 enables the second fluid channel to communicate with the third fluid channel. Figure 6 shown.

[0051] See also Figure 7 FIG. 1 is a specific embodiment of the cooling method for the airflow generator provided by the present invention. In this embodiment, the method specifically includes the following steps:

[0052] Step 701 : The impeller 12 is driven by the motor to rotate to guide the first fluid A into the first fluid channel between the impeller 12 and the guide wheel 13 .

[0053] Step 702: The air guide wheel 13 divides the first fluid A in the first fluid channel into a second fluid C and a third fluid B.

[0054] Step 703: The second fluid C enters the second fluid channel formed by the air guide plate 132 and the volute 11, and the outer side of the motor winding 222 is cooled through the second fluid channel.

[0055] Step 704 , the third fluid B enters a third fluid channel formed by the first air guide hole a and the second air guide hole b, and the motor bearing cavity 211 , the inner side of the motor winding 222 and the motor drive plate 24 are cooled through the third fluid B channel.

[0056] That is, in the airflow generator having the above heat dissipation structure, when the impeller 12 rotates to cause the first fluid A to be sucked in, the flow of the fluid in the airflow generator is as follows: Figure 8 As shown by the arrow in the middle, the sucked first fluid A will first enter the first fluid channel, and then split into the second fluid C and the third fluid B at the position of the guide wheel 13.

[0057] The second fluid C will enter the second fluid channel and flow in the second direction (i.e. Figure 8 The second end of the second fluid channel ( Figure 8 ), may be located at the first end ( Figure 8 That is, the flow direction of the second fluid C is directly opposite to the first end of the motor winding 222 and is split again, so that it flows through the inner and outer sides of the motor winding 222 respectively. The split second flow chart C will be discharged from the airflow generator through the motor drive plate 24.

[0058] In addition, the third 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. Figure 8 , 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.

[0059] 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 third fluid B and part of the second 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.

[0060] It can be seen that the beneficial effect of the present invention compared with the prior art is that the first fluid channel, the second fluid channel and the third fluid channel are set through the heat dissipation structure, 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 of 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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. A heat dissipation structure of an airflow generator, characterized in that: include: Volute, impeller, guide wheel and motor bracket; The impeller is located on a first side of the wind guide wheel, and the volute is sleeved on the outer sides of the impeller and the wind guide wheel; a first fluid channel is provided between the second side of the impeller and the first side of the wind guide wheel; The wind guide wheel is provided with a first wind guide hole; the outer side of the wind guide wheel is provided with a wind guide vane, and the wind guide vane and the volute form a second fluid channel; A motor bearing cavity is provided at the axis center of the motor bracket, an overlap 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 overlap portion; 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 heat dissipation structure 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 heat dissipation structure according to any one of claims 1 to 2, 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.

4. A cooling method for an airflow generator, applied to the heat dissipation structure according to any one of claims 1 to 3, characterized in that: include: The impeller is driven by the motor to rotate to guide the first fluid into the first fluid channel between the impeller and the guide wheel; The air guide wheel divides the first fluid in the first fluid channel into a second fluid and a third fluid; The second fluid enters a second fluid channel formed by the air guide vane and the volute, and cools the outer side of the motor winding through the second fluid channel; The third fluid enters a third fluid channel formed by the first air guide hole and the second air guide hole, and the motor bearing cavity, the inner side of the motor winding and the motor drive plate are cooled through the third fluid channel.

5. The method according to claim 4, characterized in that: Also includes: The second fluid and the third fluid are connected to each other through an air guide groove provided on the second side of the overlapping portion.

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