CN111622968A - Heat dissipation structure and cooling method of airflow generator - Google Patents

Abstract

The invention discloses a heat dissipation structure and a cooling method of an airflow generator, which comprise the following steps: the turbine shell, the impeller, the wind guide wheel and the motor support; the impeller is positioned on the 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 arranged 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; the outer side of the air guide wheel is provided with an air guide sheet, and the air guide sheet and the volute form a second fluid channel; a motor bearing cavity is arranged at the axis position of the motor support, a lapping part is arranged on the outer side of the motor bearing cavity, and a second air guide hole is formed in the first side of the lapping part; the first air guide holes and the second air guide holes form a third fluid channel, so that the heat dissipation efficiency of the airflow generator is improved.

Description

Heat dissipation structure and cooling method of airflow generator

Technical Field

The invention relates to the technical field of electromechanics, in particular to a heat dissipation structure and a cooling method of an airflow generator.

Background

In some appliances that require suction to operate, the airflow generator is a core component. Such as vacuum cleaners, sweeping robots, etc., are common. The principle of the airflow generator is that a motor drives an impeller to rotate at a high speed to generate negative pressure, so that suction force to fluid is generated. On the other hand, after the fluid is sucked into the airflow generator, the flow of the fluid can be utilized to dissipate heat of each component of the motor.

In the prior art, the structure of an airflow generator is shown in fig. 1. Fluid enters the airflow generator from the air inlet under the action of suction force and flows along the direction of an arrow in figure 1. Therefore, at the moment, the fluid passes through the gap between the air guide wheel and the motor outer cover, passes through the outer side of the motor winding and is discharged from the motor driving plate. In the process, the fluid can help the motor windings dissipate heat.

However, the prior art has the disadvantage that only the outside of the motor winding is able to dissipate heat sufficiently due to the flow path of the fluid. The inside of the motor winding and other components of the motor cannot be effectively radiated. It can be seen that the heat dissipation efficiency of the above structure is relatively low, which easily causes the temperature inside the airflow generator to be too high.

Disclosure of Invention

The invention provides a heat dissipation structure and a cooling method of an airflow generator, which improve the heat dissipation effect through the improvement of an internal structure.

In a first aspect, the present invention provides a heat dissipation structure for an airflow generator, comprising: the turbine shell, the impeller, the wind guide wheel and the motor support;

the impeller is positioned on the 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 arranged 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; the outer side of the air guide wheel is provided with an air guide sheet, and the air guide sheet and the volute form a second fluid channel;

a motor bearing cavity is arranged at the axis position of the motor support, a lapping part is arranged on the outer side of the motor bearing cavity, and a second air guide hole is formed in the first side of the lapping part; the first air guide hole and the second air guide hole form a third fluid channel.

Preferably, a first fluid channel is arranged between the second side of the impeller and the first side of the air guide wheel, and specifically comprises:

and a gap is formed between the second side of the impeller and the first side of the air guide wheel, and the first fluid channel is formed by utilizing the gap.

Preferably, the air guide sheet arranged on the outer side of the air guide wheel is specifically as follows:

the outer wall surface of the air guide wheel is provided with a plurality of air guide blades at equal intervals.

Preferably, the second fluid channel formed by the wind-guiding sheet and the volute is specifically:

the adjacent air guide sheets and the volute are enclosed to form the second fluid channel.

Preferably, the first air guiding hole and the second air guiding hole form a third fluid channel, specifically:

the wind guide wheel sleeve is arranged on the first side of the overlapping part, and the first wind guide hole and the second wind guide hole are opposite in position, so that the first wind guide hole and the second wind guide hole form a third fluid channel.

Preferably, the overlapping part is specifically:

and the second side of the lap joint part is provided with an air guide groove which enables the second fluid channel to be communicated with the third fluid channel.

In a second aspect, the present invention provides a method of cooling an airflow generator comprising:

the impeller is driven by the motor to rotate so as to guide a first fluid to enter a first fluid channel between the impeller and the air guide wheel;

the inducer 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 sheet and the volute and cools the outer side of the motor winding through the second fluid channel;

and 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 driving plate are cooled through the third fluid channel.

Preferably, the method further comprises the following steps:

the second fluid and the third fluid are communicated with each other through the air guide groove arranged on the second side of the overlapping part.

According to the heat dissipation structure and the cooling method of the airflow generator, the first fluid channel, the second fluid channel and the third fluid channel are arranged through the heat dissipation structure, so that fluid can fully dissipate heat of the inner side and the outer side of the motor winding, heat dissipation of other parts such as the outer wall of the motor body, the motor driving plate and the motor bearing cavity can be achieved, and heat dissipation efficiency of the airflow generator is improved.

Further effects of the above-mentioned unconventional preferred modes will be described below in conjunction with specific embodiments.

Drawings

In order to more clearly illustrate the embodiments or the prior art solutions of the present invention, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.

FIG. 1 is a schematic diagram of a prior art airflow generator;

fig. 2 is a schematic structural diagram of a heat dissipation structure according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of an airflow generator according to an embodiment of the present invention;

fig. 4 is a schematic structural view of an air guide wheel in the heat dissipation structure according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a motor bracket in a heat dissipation structure according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a motor bracket in a heat dissipation structure according to an embodiment of the present invention;

FIG. 7 is a schematic flow chart of a cooling method according to an embodiment of the present invention;

fig. 8 is a schematic diagram illustrating fluid flow in a cooling method according to an embodiment of the present invention.

Wherein, in the figures, the respective reference numerals:

11	scroll casing	12	Impeller
				13	Wind guide wheel	21	Motor support
24	Motor drive plate	a	First air guide hole
				b	Second air guide hole	132	Air guide sheet
221	Motor bearing	222	Electric machine winding
				211	Motor bearing cavity	212	Lap joint part
213	Support body	216	Air guide groove

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail and completely with reference to the following embodiments and accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the prior art, the structure of the airflow generator is shown in fig. 1. And the fluid enters the air flow generator from the air inlet under the action of suction. In the airflow generator shown in figure 1 there is only a single fluid path, i.e. in the direction of the arrows in figure 1. That is, the fluid will pass through the gap between the inducer and the motor housing, pass through the outside of the motor winding, and be discharged from the motor drive plate. In the process, fluid flows through the outer side of the motor winding, and the heat dissipation of the motor winding can be facilitated.

However, the prior art has the disadvantage that only the outside of the motor winding is able to dissipate heat sufficiently due to the flow path of the fluid. The inside of the motor winding and other components of the motor cannot be effectively radiated. It can be seen that the heat dissipation efficiency of the above structure is relatively low, which easily causes the temperature inside the airflow generator to be too high.

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

Referring to fig. 2-6, there are shown embodiments of heat dissipation structures for airflow generators provided in accordance with the present invention. In this embodiment, the airflow generator includes a scroll 11, an impeller 12, an air guide wheel 13, and a motor bracket 21, as shown in fig. 2. In addition, the overall structure of the airflow generator in which the heat dissipation structure is located is as shown in fig. 3, and further includes a motor body 22, a motor driving board 24, and the like.

Referring to fig. 2, the impeller 12 is located on a first side of the inducer 13. As shown in fig. 2, the first side of the inducer 13 is above the inducer 13. The volute 11 is sleeved on the outer sides of the impeller 12 and the air guide wheel 13.

In the present embodiment, a first fluid channel is disposed between the second side of the impeller 12 and the first side of the wind guide wheel 13, as shown in fig. 2. The second side of the impeller 12 is in fig. 2 below the impeller 12. Unlike the structure shown in fig. 1 in which the impeller and the air guide wheel are attached in the prior art, 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 using the gap.

The structure of the inducer 13 is shown in figure 4. The wind guide wheel 13 is provided with a first wind guide hole a. The outer side of the air guide wheel is provided with an air guide sheet 132. Specifically, the outer wall surface of the wind guide wheel 13 is provided with a plurality of wind guide blades 132 at equal intervals. The air guiding sheets 132 and the scroll 11 form a second fluid channel, that is, two adjacent air guiding sheets 132 and the scroll 11 together enclose to form a cavity, that is, the second fluid channel.

As shown in fig. 5, a motor bearing cavity 211 is provided at the axial center of the motor bracket 21. The outer side of the motor bearing cavity 211 is provided with a lapping part 212. The motor bearing 221 shown in fig. 3 is placed in the motor bearing cavity 211. The first end (i.e. the upper end in fig. 3) of the motor bearing 221 penetrates the impeller 12, so that the motor can drive the impeller 12 to rotate.

A second air guiding hole b is formed on a first side (i.e., the upper side in fig. 2) of the overlapping part 212; the first air guiding hole a and the second air guiding hole b form a third fluid channel. Specifically, the wind guide wheel 13 is sleeved on the first side of the overlapping part 212, and the first wind guide hole a and the second wind guide hole b are opposite in position, so that the first wind guide hole a and the second wind guide hole b form a third fluid channel.

In addition, a wind guide groove 216 is provided at a second side of the overlapping portion 212, and the wind guide groove 216 communicates the second fluid passage with the third fluid passage. As shown in fig. 6.

Referring to fig. 7, there is shown an embodiment of a cooling method for an airflow generator according to the present invention. In this embodiment, the method specifically includes the following steps:

step 701, the impeller 12 is driven by the motor to rotate so as to guide the first fluid a to enter the first fluid channel between the impeller 12 and the wind guide wheel 13.

Step 702, the wind-guiding wheel 13 divides the first fluid a in the first fluid channel into a second fluid C and a third fluid B.

And 703, allowing the second fluid C to enter a second fluid channel formed by the air guide sheet 132 and the volute 11, and cooling the outer side of the motor winding 222 through the second fluid channel.

And 704, allowing the third fluid B to enter a third fluid channel formed by the first air guide hole a and the second air guide hole B, and cooling the motor bearing cavity 211, the inner side of the motor winding 222 and the motor driving plate 24 through the third fluid channel B.

That is, in the airflow generator having the above-described heat dissipation structure, when the impeller 12 rotates to cause the first fluid a to be sucked, the flow of the fluid in the airflow generator is as shown by the arrow in fig. 8. The sucked first fluid a will first enter the first fluid channel and will be split at the location of the wind deflector 13 into a second fluid C and a third fluid B.

Wherein the second fluid C will enter the second fluid channel and flow in a second direction of the flow generator, i.e. downwards as seen in fig. 8. The second end of the second fluid passageway (the lower end shown in fig. 8) may be located at the first end (the upper end shown in fig. 8) of the motor windings 222. That is, the flow direction of the second fluid C is opposite to the first end of the motor winding 222 and is shunted again, so that the second fluid C flows through the inner side and the outer side of the motor winding 222 respectively. The diverted second flow sheet C will exit the airflow generator via the motor drive plate 24.

In addition, the third fluid B will enter the third fluid channel, i.e. pass through the first wind guiding hole a and the second wind guiding hole B in sequence, and continue to flow in the second direction of the airflow generator (i.e. downward in fig. 8), i.e. through the inner side of the motor winding 222. And finally exits the airflow generator via motor drive plate 24.

It will be appreciated that the fluid flow described above, as in the prior art, can not only dissipate heat to the outside of the motor windings 222. Meanwhile, the third fluid B and a part of the second fluid C flowing through the inside of the motor winding 222 can dissipate heat of the inside of the motor winding 222, the outer wall of the motor body 22, and the motor driving board 24. The fluid B can also dissipate heat from the motor bearing cavity 211 when flowing through the third fluid passage. Thereby enhancing the heat dissipation effect for the airflow generator.

Therefore, compared with the prior art, the invention has the following beneficial effects: through the heat radiation structure has set up first fluid passage, second fluid passage and third fluid passage for fluid can be abundant dispels the heat to the inside and outside both sides of motor winding 222, and can realize the heat dissipation to other parts such as the outer wall of motor body 22, motor drive plate 24 and motor bearing chamber 211 simultaneously, has improved airflow generator's radiating efficiency.

It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects.

The embodiments of the present invention are described in a progressive manner, and the same and similar parts among the embodiments can be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, as for the apparatus embodiment, since it is substantially similar to the method embodiment, the description is relatively simple, and for the relevant points, reference may be made to the partial description of the method embodiment.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, 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 (8)

1. A heat dissipating structure for an airflow generator, comprising: the turbine shell, the impeller, the wind guide wheel and the motor support;

the impeller is positioned on the 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 arranged 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; the outer side of the air guide wheel is provided with an air guide sheet, and the air guide sheet and the volute form a second fluid channel;

a motor bearing cavity is arranged at the axis position of the motor support, a lapping part is arranged on the outer side of the motor bearing cavity, and a second air guide hole is formed in the first side of the lapping part; the first air guide hole and the second air guide hole form a third fluid channel.

2. The heat dissipation structure of claim 1, wherein a first fluid channel is disposed between the second side of the impeller and the first side of the wind guide wheel, and specifically comprises:

and a gap is formed between the second side of the impeller and the first side of the air guide wheel, and the first fluid channel is formed by utilizing the gap.

3. The heat dissipation structure of claim 1, wherein the air guiding fins disposed on the outer side of the air guiding wheel are specifically:

the outer wall surface of the air guide wheel is provided with a plurality of air guide blades at equal intervals.

4. The heat dissipation structure of claim 3, wherein the second fluid channel formed by the air guiding sheet and the scroll casing is specifically:

the adjacent air guide sheets and the volute are enclosed to form the second fluid channel.

5. The heat dissipation structure as claimed in any one of claims 1 to 4, wherein the first air guiding hole and the second air guiding hole form a third fluid channel, specifically:

the wind guide wheel sleeve is arranged on the first side of the overlapping part, and the first wind guide hole and the second wind guide hole are opposite in position, so that the first wind guide hole and the second wind guide hole form a third fluid channel.

6. The heat dissipation structure as claimed in any one of claims 1 to 4, wherein the overlapping portion is specifically:

and the second side of the lap joint part is provided with an air guide groove which enables the second fluid channel to be communicated with the third fluid channel.

7. A method of cooling an airflow generator, comprising:

the impeller is driven by the motor to rotate so as to guide a first fluid to enter a first fluid channel between the impeller and the air guide wheel;

the inducer 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 sheet and the volute and cools the outer side of the motor winding through the second fluid channel;

and 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 driving plate are cooled through the third fluid channel.

8. The method of claim 7, further comprising:

the second fluid and the third fluid are communicated with each other through the air guide groove arranged on the second side of the overlapping part.

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