Small-size quick-cooling support type fan

Abstract

The utility model provides a small-size quick-cooling support type fan which comprises a brush carrier, a driving motor connected with the brush carrier and an impeller assembly connected with the driving motor, the impeller assembly comprises a fixed impeller, a movable impeller and an impeller cover, and the fixed impeller comprises a fixed impeller shell. A bearing hole and a plurality of guide vanes arranged around the bearing hole are arranged in the middle of the fixed impeller shell, guide channels are arranged among the guide vanes, and the guide vanes extend to the bearing hole from the edge of the fixed impeller shell. According to the invention, the guide vanes of the fixed impeller extend to the bearing hole from the edge, so that noise caused by turbulent flow of wind in the fixed impeller is avoided, and meanwhile, more wind can be blown to the driving motor. Compared with a conventional fan structure, the fan has the remarkable advantages of being light and small in size, large in application range, high in use flexibility, good in cooling effect, convenient and rapid to install, high in working efficiency and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a small-volume quick-cooling bracket-type fan. Background Art

[0002] Vacuum cleaners are widely used in modern household appliances, and one of their core components is the fan. This type of fan is usually composed of a brush holder, a drive motor, a fixed impeller, a hood, and a moving impeller. The drive motor in these devices drives the moving impeller to generate air flow to form a negative pressure in the hood. The airflow is sucked in and thrown out at high speed through the moving impeller from the air inlet of the hood. The airflow is sucked in and the moving impeller rotates at a high speed. The sucked air flows out from the guide channel of the fixed impeller to achieve functions such as sucking out dust and debris.

[0003] like Figure 1 As shown, during long-term use of the existing vacuum cleaner fan, there is a gap between the stator impeller guide vane 313' and the stator impeller bearing chamber 312', causing air to flow in the gap. On the one hand, the airflow in the gap is turbulent and generates noise, and on the other hand, the airflow is lost and cannot flow out better. Utility Model Content

[0004] To this end, the utility model provides a small-volume quick-cooling bracket-type fan, which can solve the problem of airflow flowing in the gap in the existing stator impeller.

[0005] To solve the above technical problems, the utility model provides a small-volume quick-cooling bracket-type fan, which includes a brush holder, a drive motor connected to the brush holder and an impeller assembly connected to the drive motor, the impeller assembly including a stator impeller, a movable impeller and an impeller cover, wherein the stator impeller includes a stator impeller housing, a bearing chamber is provided in the middle position of the stator impeller housing, a bearing hole through which the output shaft of the drive motor passes is provided in the middle of the bearing chamber, a plurality of guide blades are arranged around the bearing chamber, a guide channel is provided between every two guide blades, the air inlet of the guide channel faces the movable impeller, the air outlet of the guide channel faces the drive motor, and the guide blades extend from the edge of the stator impeller housing to the bearing chamber.

[0006] In one embodiment of the present invention, the guide vanes include eight pieces, and the guide vanes are integrally formed with the stator impeller housing.

[0007] In one embodiment of the utility model, the driving motor includes a stator and a rotor rotatably disposed inside the stator, the stator is connected to the brush holder via screws, the rotor is rotatably disposed inside the stator, and carbon brushes are disposed inside the brush holder.

[0008] In one embodiment of the present invention, a bushing and a gasket are provided between the stator impeller and the movable impeller.

[0009] In one embodiment of the utility model, the output shaft of the driving motor is fixedly connected to the rotor, and a thread is provided at the end of the output shaft, which is connected to the impeller through a gasket and a nut.

[0010] In one embodiment of the present invention, the impeller cover and the stator impeller housing are bonded to each other or snap-fitted to each other.

[0011] In one embodiment of the utility model, a protrusion is integrally formed on the surface of the stator impeller housing facing the drive motor, and a plurality of protrusions are arranged around the stator impeller housing. A bolt groove is provided on the protrusion, and a bolt hole is provided on the stator. The stator impeller housing is fixed to the stator by bolts.

[0012] In an embodiment of the present invention, a circle of wind collecting sheets is wrapped around the periphery of the plurality of protrusions.

[0013] The above technical solution of the utility model has the following advantages compared with the prior art:

[0014] The small-volume quick-cooling bracket-type fan described in the utility model has an output shaft of a driving motor that passes through the bearing chamber of the fixed impeller housing and is connected to the bearing of the fixed impeller housing, and the end of the driving motor output shaft is fixedly connected to the impeller by bolts, thereby driving the rotation of the impeller. The impeller cover is sleeved on the impeller and connected to the fixed impeller housing. The impeller cover and the impeller are both provided with air inlets, and the wind is sucked by the rotation of the impeller so that the wind enters the impeller cover, and then is guided to the fixed impeller by the blades of the impeller, and the wind is blown upward by the guide vanes of the fixed impeller, and blows to the surface of the driving motor, thereby cooling the driving motor. Among them, the guide vanes of the fixed impeller extend from the edge to the bearing chamber, so that the wind will not generate turbulence and noise in the fixed impeller, and at the same time, more wind can be blown to the driving motor. Compared with the conventional fan structure, it has the significant advantages of light and compact size, wide application range, high flexibility of use, good cooling effect, convenient and quick installation, and high work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments of the utility model in combination with the accompanying drawings.

[0016] Figure 1 It is a structural schematic diagram of a fixed impeller in the prior art;

[0017] Figure 2 This is a schematic diagram of the internal structure of a small-volume rapid cooling bracket-type fan in a preferred embodiment of the utility model;

[0018] Figure 3 yes Figure 2 The exploded structure diagram of the small-volume rapid cooling bracket-type fan shown;

[0019] Figure 4 yes Figure 2 The schematic diagram of the structure of the stator impeller in the small-volume rapid cooling bracket-type fan is shown.

[0020] Explanation of the reference numerals in the specification: 100, casing; 200, driving motor; 210, output shaft; 220, bearing; 300, impeller assembly; 310, fixed impeller; 311, fixed impeller casing; 312 / 312', bearing chamber; 313 / 313', guide vane; 320, moving impeller; 330, connecting frame; 340, stator; 350, rotor; 360, wind collecting piece; 370, impeller cover. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0022] Embodiment 1

[0023] See also Figure 2-4 As shown, the present embodiment provides a small-volume quick-cooling bracket-type fan, which includes: a brush holder, a driving motor 200 connected to the brush holder and an impeller assembly 300 connected to the driving motor 200, the impeller assembly 300 includes a stator impeller 310, a movable impeller 320 and an impeller cover 370, wherein the stator impeller 310 includes a stator impeller housing 311, a bearing chamber 312 is provided in the middle position of the stator impeller housing 311, a bearing hole through which the output shaft 210 of the driving motor 200 passes and a plurality of guide blades 313 are provided in the middle position of the bearing chamber, a guide channel is provided between every two guide blades 313, an air inlet of the guide channel faces the movable impeller 320, and an air outlet of the guide channel faces the driving motor 200, and the guide blades 313 extend from the edge of the stator impeller housing 311 to the bearing chamber 312.

[0024] A bushing and a gasket are provided between the stator impeller 310 and the movable impeller 320 to separate the stator impeller from the movable impeller.

[0025] The small-volume quick-cooling bracket-type fan described in the utility model has an output shaft 210 of the driving motor 200 that passes through the bearing hole 312 of the fixed impeller housing 311 and is connected to the bearing 220 of the fixed impeller housing 311. The end of the output shaft 210 of the driving motor 200 is fixedly connected to the impeller 320 by bolts, thereby driving the rotation of the impeller 320. The impeller cover 370 is sleeved on the impeller 320 and connected to the fixed impeller housing 311. The impeller cover 370 and the impeller 320 are both provided with air inlets. The impeller 320 rotates to absorb wind, so that the wind enters the impeller cover 370, and then is guided to the fixed impeller 310 through the blades of the impeller 320, and the wind is blown upward through the guide blades 313 of the fixed impeller 310, so as to cool the driving motor 200. The guide vanes 313 of the stator impeller 310 extend from the edge to the bearing chamber 312, so that the wind will not flow turbulently between the guide vanes 313 in the stator impeller 310 and the bearing chamber 312 to generate noise, and at the same time, the wind can be better guided, and more wind can be blown to the drive motor 200. Compared with the conventional fan structure, it has significant advantages such as light and compact size, wide application range, high flexibility of use, good cooling effect, convenient and quick installation, and high work efficiency.

[0026] The small-volume quick-cooling bracket fan in this embodiment is applied to a vacuum cleaner. When the motor rotates, the impeller 320 forms a negative pressure in the impeller cover 370, and the air flow is sucked in and thrown out at high speed through the impeller 320 from the air inlet of the impeller cover 370. The air flow is sucked in and the impeller 320 rotates highly. The sucked cooling air is blown to the stator 340 coil package from the guide channel of the fixed impeller 310. The fixed impeller 310 is provided with 8 guide blades 313, and these 8 blades are connected to the outer surface of the bearing chamber 312 of the fixed impeller 310, which greatly improves the full utilization of the cooling air. The temperature of the stator 340 coil package is optimized by 10-15°C. The cooling air is fully guided when passing through the guide blades 313, and the outflow of the cooling air is smoother, breaking the old process in which the guide blades 313 of the traditional fixed impeller 310 are not connected to the bearing chamber 312. The old technology has always been a technical bottleneck for customers due to the shortcomings of the air duct, high noise and low air volume. This application can directly reduce noise by 1-2 decibels and increase air volume by 3%. It saves material waste and improves performance in terms of traditional technology. On the basis of the above advantages, it also improves the difficulty of processing and reduces energy consumption by 2%.

[0027] The impeller cover 370 and the stator impeller 310 are bonded and connected to each other. In other embodiments, the impeller cover 370 and the stator impeller 310 can also be configured to be connected to each other in other connection modes such as mutual snap-fit ​​connection.

[0028] In this embodiment, the drive motor 200 includes a stator 340 and a rotor 350 rotatably arranged inside the stator 340. The stator 340 is connected to the brush holder and the stator impeller housing by screws. The rotation of the rotor 350 is arranged inside the stator, and the rotor 350 is connected to the commutator through the output shaft. Carbon brushes are arranged in the brush holder, and the carbon brushes abut against the commutator.

[0029] In this example, a thread is disposed at the end of the output shaft 210 , which is connected to the impeller 320 via a washer and a nut.

[0030] The drive motor 200 and the impeller assembly 300 in this embodiment are sequentially arranged along the axial direction of the fan, and the drive motor 200 includes an output shaft 210 and a bearing 220. The output shaft 210 is fixedly connected to the rotor, one end of which passes through the rotor 350 and is fixedly connected to the commutator, and the bearing 220 is sleeved on the output shaft 210 and connected to the stator 310. Specifically, a bearing chamber 312 is provided on the stator housing 311 in this embodiment, and the bearing 220 is embedded in the bearing chamber 312, and the output shaft 210 passes through the bearing hole, thereby ensuring the stability of the relative position of the two.

[0031] At the same time, a protrusion is integrally formed on the surface of the stator impeller housing facing the drive motor. Two protrusions are arranged around the stator impeller housing and are symmetrically arranged on the stator impeller housing. A bolt groove is provided on the protrusion. At the same time, a bolt hole is provided on the stator, and a bolt hole is also provided on the brush holder. The bolt passes through the brush holder bolt hole, the stator bolt hole and the bolt groove, thereby fixing the three together.

[0032] In one embodiment of the utility model, in order to prevent the airflow from flowing out from the side, a circle of wind collecting sheets is wrapped around the periphery of the plurality of protrusions. The wind collecting sheets are fixed on the protrusions by gluing, or can be integrally formed with the protrusions.

[0033] Meanwhile, the wheel assembly 300 further includes a moving impeller 320, and the moving impeller 320 is disposed on a side of the fixed impeller 310 away from the driving motor 200;

[0034] The guide blades 313 in this embodiment include eight pieces, and a plurality of the guide channels extend radially outward from the center of the stator housing 311, and a plurality of the guide channels are evenly spaced and arranged on the stator housing 311, and the guide channels are provided with at least one corner. In order to change the direction of the cooling wind, the flow rate of the cooling wind can be reduced, while the residence time of the cooling wind is increased, and the cooling effect is improved. Based on this, the present application can solve the problem that the guide channel in the conventional structure is difficult to control the cooling wind, and thus the volume of the chamber needs to be increased. Based on this structural setting, the present application can miniaturize the fan without reducing the working efficiency, reduce costs and increase efficiency. The guide channel in this embodiment is provided with a corner, and in other embodiments, it can also be set to other shapes and quantities according to actual use requirements, and the present utility model does not make specific restrictions on this.

[0035] In summary, the above technical solution of the utility model has the following advantages compared with the prior art:

[0036] The small-volume quick-cooling bracket-type fan described in the utility model has an output shaft 210 of the driving motor 200 that passes through the bearing hole of the fixed impeller housing 311 and is connected to the bearing 220 of the fixed impeller housing 311. The end of the output shaft 210 of the driving motor 200 is fixedly connected to the impeller 320 by bolts, thereby driving the rotation of the impeller 320. The impeller cover 370 is sleeved on the impeller 320 and connected to the fixed impeller housing 311. The impeller cover 370 and the impeller 320 are both provided with air inlets. The impeller 320 rotates to absorb wind, so that the wind enters the impeller cover 370, and then is guided to the fixed impeller 310 through the blades of the impeller 320, and the wind is blown upward through the guide blades 313 of the fixed impeller 310, so as to cool the driving motor 200. The guide blades 313 of the stator impeller 310 extend from the edge to the bearing chamber 312, so that the wind will not flow turbulently in the stator impeller 310 to generate noise, and more wind can be blown to the drive motor 200. Compared with the conventional fan structure, it has significant advantages such as light and compact size, wide application range, high flexibility of use, good cooling effect, convenient and quick installation, and high work efficiency.

[0037] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.

Claims

1. A small-volume rapid cooling bracket fan, characterized in that: It includes a brush holder, a driving motor connected to the brush holder and an impeller assembly connected to the driving motor, wherein the impeller assembly includes a stator impeller, a movable impeller and an impeller cover, wherein the stator impeller includes a stator impeller housing, a bearing hole through which the output shaft of the driving motor passes and a plurality of guide vanes arranged around the bearing hole are provided in the middle position of the stator impeller housing, a guide channel is provided between every two guide vanes, an air inlet of the guide channel faces the movable impeller, an air outlet of the guide channel faces the driving motor, and the guide vanes extend from the edge of the stator impeller housing to the bearing hole.

2. A small-volume rapid cooling bracket-type fan according to claim 1, characterized in that: The guide vanes include eight pieces, and the guide vanes are integrally formed with the stator impeller housing.

3. A small-volume rapid cooling bracket-type fan according to claim 1, characterized in that: The driving motor comprises a stator and a rotor rotatably arranged inside the stator. The stator is connected to the brush holder through screws. The rotor is rotatably arranged inside the stator. Carbon brushes are arranged inside the brush holder.

4. A small-volume rapid cooling bracket-type fan according to claim 1, characterized in that: A bushing and a gasket are arranged between the stator impeller and the movable impeller.

5. The small-volume rapid cooling bracket-type fan according to claim 3 is characterized in that: The output shaft of the driving motor is fixedly connected to the rotor, and a thread is arranged at the end of the output shaft, which is connected to the impeller through a gasket and a nut.

6. A small-volume rapid cooling bracket-type fan according to claim 1, characterized in that: The impeller cover and the stator impeller are bonded to each other or snap-fitted to each other.

7. The small-volume rapid cooling bracket-type fan according to claim 3 is characterized in that: The surface of the stator impeller housing facing the drive motor is integrally formed with a protrusion, and a plurality of the protrusions are arranged around the stator impeller housing. The protrusions are provided with bolt grooves, and bolt holes are provided on the stator. The stator impeller housing is fixed to the stator by bolts.

8. A small-volume rapid cooling bracket-type fan according to claim 7, characterized in that: A circle of wind collecting sheets is wrapped around the periphery of the plurality of protrusions.

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