CN1932302A - Cooling fan with air guide outlet - Google Patents

Abstract

A heat dissipation fan with a diversion air outlet mainly comprises: a casing with air inlet and outlet on two sides, a base with several rib plates fixed in the middle of the outlet, and each rib plate connected between the casing and the base in radial shape, a fan with a stator, a fan wheel and several vanes on the base; at least two guide rings are coaxially arranged on each rib plate between the base and the shell, and an axial inclination angle is formed between each guide ring. The air flow can be guided, the air pressure is increased, and the air flow is intensively radiated; but also can expand the heat dissipation range and carry out uniform and effective heat dissipation on the object to be dissipated with larger size. The air-cutting noise of the heat dissipation fan can be reduced, and the overall heat dissipation efficiency of the heat dissipation fan is improved.

Description

Cooling fan with air guide outlet

technical field

The invention relates to a heat dissipation fan, especially a fan with at least two guide rings at the air outlet of the housing, each guide ring forms various axial inclinations with respect to the axial direction of the housing, so as to guide the airflow and increase the wind pressure. Cooling fans with air guide outlets to concentrate the cooling airflow or expand the cooling range.

Background technique

Referring to FIG. 1 , the housing of a conventional cooling fan, the housing 10 is provided with an air inlet 11 , an air outlet 12 , a base 13 and ribs 14 . Two sides of the casing 10 are respectively an air inlet 11 and an air outlet 12 . The base 13 is firmly arranged in the middle of the air outlet of the casing 10 by several ribs 14 for fixing a fan (not shown in the figure). The fan has a stator, a fan wheel and several blades (not shown in the figure) . Therefore, when the fan wheel is in operation, the heat dissipation fan can suck the airflow through the air inlet 11 and discharge it through the air outlet 12, so as to dissipate heat from an object to be dissipated (such as heat dissipation fins or a central processing unit).

Although the above-mentioned conventional heat dissipation fan does have a heat dissipation function, the airflow of the heat dissipation fan can only be discharged along the axial direction of the housing 10 through the air outlet 12 in order to dissipate heat directly below the air outlet 12 . However, if the object to dissipate heat is not located directly below the air outlet 12 , the object to dissipate heat will not be able to receive most of the heat dissipation airflow, so uneven heat dissipation may occur and affect the actual heat dissipation efficiency. On the other hand, when the object to dissipate heat cannot be selected to be combined directly below the base 13 or within the outer diameter of the air outlet 12 due to limited assembly space (for example, in a notebook computer), or when the object to be dissipated When the heat dissipation object has a large size and cannot be completely directly under the heat dissipation fan, the actual heat dissipation efficiency will be seriously affected. Furthermore, when the air flow passes through the ribs 14 , it is easy to form turbulent or turbulent flow, which will generate noise and reduce heat dissipation efficiency.

In view of this, the present invention improves the above-mentioned shortcomings, and at least two guide rings are arranged at the air outlet of the cooling fan. The deflector ring is arranged on several ribs of the air outlet. Since the deflector ring is inclined to the outer diameter direction or to the inner diameter direction with respect to the axial direction of the air outlet of the heat dissipation fan, different inclination angles can be dispersed. Either concentrate the airflow, or guide the airflow to any position where heat dissipation is desired, and at the same time increase its wind pressure relatively. Therefore, the present invention can indeed expand the heat dissipation range, concentrate the air flow, reduce the wind shear noise, improve the overall heat dissipation efficiency and increase the design margin of assembly.

Contents of the invention

The main purpose of the present invention is to provide a cooling fan with a guide air outlet, which is provided with at least two guide rings at the air outlet of the casing, and each guide ring has various axial inclinations, which can guide the air flow and increase the wind pressure , Concentrated heat dissipation airflow; it can also expand the heat dissipation range, and evenly and effectively dissipate heat for larger objects to be dissipated. Therefore, the wind-cut noise of the cooling fan can be reduced, and the overall cooling efficiency of the cooling fan can be improved.

The secondary object of the present invention is to provide a heat dissipation fan with a guide air outlet, each rib plate is inclined along the wind driving direction of the fan wheel blades, and has the effect of guiding air flow. At the same time, the sections of the several ribs between the ribs can be designed with various inclination angles according to the needs, thereby promoting the air flow. Therefore, the margin of assembly and design can be relatively increased, and the wind shear noise of the cooling fan can also be reduced, and the cooling fan can be improved. overall cooling efficiency.

Another object of the present invention is to provide a cooling fan with a guide air outlet, the inclination angles of the guide rings arranged coaxially can be designed according to the requirements, and the user can choose to guide the airflow to any position where heat dissipation is desired. Concentrate the heat dissipation airflow to improve heat dissipation efficiency; you can also choose a dispersed airflow type to expand the heat dissipation range, improve the overall heat dissipation efficiency and the margin of assembly design.

Technical scheme of the present invention:

A heat dissipation fan with a guide air outlet, mainly comprising: a housing with air inlets and air outlets on both sides, a base with several ribs fixed in the middle of the air outlet of the housing, and each rib is in the shape of It is radially connected between the shell and the base, and a fan is arranged on the base, and the fan has a stator, a fan wheel and several blades; it is characterized in that:

On each rib plate located between the base and the casing, at least two guide rings are provided on the coaxial ring, and an axial inclination angle is formed between each guide ring.

Alternatively, at least two first guide rings and at least two second guide rings are arranged on each rib plate located between the base and the housing, and each second guide ring is arranged on each first guide ring. Between the flow ring and the base: an axial inclination angle is formed between each first flow guide ring and each second flow guide ring with respect to the axial direction of the casing.

Alternatively, at least one first flow guide ring and at least one second flow guide ring are arranged on each rib plate located between the base and the housing, and the second flow guide ring is arranged on the first flow guide ring. Between the ring and the housing: the first guide ring is provided with an inner ring surface and an outer ring surface, the inner ring surface extends downward and slopes toward the inner diameter direction, and the outer ring surface extends downward and slopes toward the outer diameter direction; the second The guide ring is provided with an inner ring surface and an outer ring surface, the inner ring surface extends downward and is inclined to the inner diameter direction, and the outer ring surface extends downward and is inclined to the outer diameter direction; the inner rings of the first and second guide rings One of the outer ring surface and the outer ring surface forms an axial inclination angle with respect to the axial direction of the casing.

The advantages of the present invention are:

1. Since at least two different deflector rings are arranged on each rib plate located between the base and the shell, when the air flow is discharged from the air outlet of the shell, the air flow passes through each guide ring and each rib plate , guide the airflow to its inner area, middle area and outer area respectively, which can ensure centralized heat dissipation at a specific location, or guide the airflow to the object to be dissipated directly under the air outlet in a limited assembly space. It can guide the airflow, increase the air pressure at the air outlet, concentrate the cooling airflow, and increase the cooling efficiency of the objects to be cooled. It can also expand the range of heat dissipation, and evenly and effectively dissipate heat for larger-sized objects to be dissipated. Therefore, the wind-cut noise of the cooling fan can be reduced, and the overall cooling efficiency of the cooling fan can be improved.

2. Since each rib plate is inclined along the wind-dispelling direction of the fan wheel blade, each rib plate has the effect of guiding the airflow. At the same time, the sections of several ribs between the ribs can be designed with various inclination angles according to the requirements, thereby promoting the flow of air, so that the assembly and design margin can be relatively increased.

3. Since the inclination angles of the guide rings arranged coaxially can be changed according to requirements, the user can choose to guide the airflow to any desired heat dissipation position to concentrate the heat dissipation airflow and improve the heat dissipation efficiency; they can also choose to disperse the airflow type, expand the heat dissipation range, improve the overall heat dissipation efficiency and the margin of assembly design.

Description of drawings

Figure 1 is a perspective view of a conventional cooling fan housing.

Fig. 2 is a perspective view of the first embodiment of the present invention.

Fig. 3 is a bottom view of the first embodiment of the present invention.

Fig. 4 is a sectional view along 4-4 in Fig. 3 .

Fig. 5 is a partially enlarged view in Fig. 4 .

Fig. 6 is a perspective view of the second embodiment of the present invention.

Fig. 7 is a bottom view of the second embodiment of the present invention.

Fig. 8 is a sectional view along 7-7 in Fig. 7 .

Fig. 9 is a sectional view of the third embodiment of the present invention.

Fig. 10 is a sectional view of the fourth embodiment of the present invention.

Fig. 11 is a perspective view of a fifth embodiment of the present invention.

Fig. 12 is a bottom view of the fifth embodiment of the present invention.

Fig. 13 is a sectional view along line 12-12 in Fig. 12 .

Fig. 14 is a sectional view of the sixth embodiment of the present invention.

Fig. 15 is a sectional view of the seventh embodiment of the present invention.

Detailed ways

In order to allow the purpose, technical features and advantages of the present invention to be more clearly understood, the preferred embodiments of the present invention are specifically cited below, and detailed descriptions are as follows in conjunction with the accompanying drawings:

Some components of the casing of the present invention are the same as those of the conventional heat dissipation fan, so the same parts of the two use the same symbols, and their structures and functions will not be described in detail.

Please refer to Figures 2-5, the first embodiment of the present invention, a heat dissipation fan with a guide air outlet, mainly includes a housing 10, an air inlet 11, an air outlet 12, a base 13, several Rib 14 and at least two guide rings 15a, 15b. The casing 10 is made of plastic or metal. The air inlet 11 and the air outlet 12 are respectively disposed on two sides of the casing 10 . The base 13 is located in the middle of the air outlet 12 of the casing 10 , and a fan is disposed on the base 13 , and the fan has a stator, a fan wheel 20 and several blades 21 (as shown in FIG. 4 ). Each rib 14 is radially and concentrically connected between the housing 10 and the base 13 . Each deflector ring 15a, 15b is coaxially arranged on each rib 14 and located between the base 13 and the housing 10 (as shown in FIG. 4 ). The guide ring 15a is parallel to the ring wall of the casing 10 (not shown), while the guide ring 15b extends downward relative to the axial direction of the casing 10 and is inclined toward the outer diameter direction (as shown in FIG. 4 ). An axial inclination angle is formed between the guide ring 15b and the guide ring 15a. In addition, each guide ring 15 extends through each rib 14 and is fixed on each rib 14 . (As shown in Figure 5), the axial length L of the guide ring 15a relative to the housing 10 on the side of the air outlet 12 is preferably greater than its radial width W, and the guide ring 15a is near the air inlet of the housing 10 An arc-shaped flow guiding part 150 is provided at the top of the side to reduce turbulent flow and turbulent flow. Furthermore, each rib 14 can also be inclined along the wind driving direction of several blades 21 of the fan wheel 20 .

Please refer to FIG. 4 again, which is a schematic diagram of the action of guiding the airflow by each guide ring 15 . When the fan wheel 20 was in operation, its blades 21 sucked in the airflow from the air inlet 11 of the housing 10, and drove the airflow to be discharged from the air outlet 12, so as to dissipate heat from objects (not shown), such as cooling fins or central processing. to dissipate heat. When the air flow passes through the guide ring 15 a and the ribs 14 of the air outlet 12 , the guide ring 15 a guides the air flowing through the air outlet 12 into an inner area 17 and an outer area 16 respectively. The inner area 17 faces toward the center of the air outlet 12 ; the outer area 16 faces toward the outer diameter of the air outlet 12 and is located between each rib 14 and the casing 10 . Therefore, the heat dissipation fan can ensure concentrated heat dissipation at a specific location, or is suitable for directing airflow to objects to be dissipated directly below the air outlet 12 in a limited assembly space (such as in a notebook computer). Therefore, the guide rings 15a, 15b of the present invention indeed have the effect of guiding the airflow.

Furthermore, as shown in FIGS. 2 and 3 , when the ribs 14 are inclined along the wind driving direction of the blades 21 of the fan wheel 20 , each rib 14 also has the function of guiding the air flow. At the same time, the several rib sections 14a, 14b, 14c between the ribs 14, that is, the different sections separated by the guide rings 15a, 15b, can be designed with various inclination angles according to requirements.

Please refer to FIGS. 6-8, the structure of the second embodiment of the present invention is basically the same as that of the first embodiment. Tilt in different directions (as shown in Figure 8). Each deflector ring 15a, 15b forms various inclination angles with respect to the axial direction of the housing 10 .

Please refer to Fig. 8 again, when the fan wheel 20 is in operation, its blade 21 sucks the airflow from the air inlet 11 of the casing 10, and drives the airflow to be discharged from the air outlet 12, so as to dissipate heat to objects (not shown) , such as cooling fins or CPU for heat dissipation. When the airflow passes through the guide rings 15a, 15b and the ribs 14 of the air outlet 12, since the guide rings 15a, 15b have different inclinations in the direction of the outer diameter, the airflow can be respectively guided into an inner area 17 and an outer area 16 . The inner area 17 is adjacent to the base 13 ; the outer area 16 faces outside the outer diameter direction of the air outlet 12 . Therefore, the heat dissipation fan can expand the heat dissipation range, or be suitable for directing the airflow to objects to be dissipated that are not directly below the air outlet 12 in a limited assembly space (such as in a notebook computer), or be suitable for objects with relatively large Large-sized objects to dissipate heat can dissipate heat evenly. Therefore, each guide ring 15a, 15b of the present invention does have the effect of guiding airflow.

Furthermore, as shown in FIG. 8 , along the inclination directions of the guide rings 15 a , 15 b , the guide rings 15 a , 15 b form various inclination angles, which can relatively increase the wind pressure at the air outlet 12 . On the other hand, since the outer area 16 close to the air outlet 12, each deflector ring 15a, 15b also has a pressurizing effect due to its downward extension and inclination towards the outer diameter direction, thereby providing the effect of concentrating the airflow, thereby increasing the efficiency of the airflow flow .

In addition, as shown in FIG. 6 , when the ribs 14 are inclined along the wind driving direction of the blades 21 of the fan wheel 20 , the ribs 14 also have the function of guiding the air flow. At the same time, the rib sections 14a, 14b, 14c of each rib 14, that is, the different sections separated by the guide rings 15a, 15b, can be designed with various inclination angles according to requirements.

Please refer to Fig. 9 again, the structure of the third embodiment of the present invention is basically the same as that of the first and second embodiments, the difference is that each deflector ring 15a, 15b extends downward relative to the air outlet 12 and toward the inner diameter direction tilt. Each deflector ring 15a, 15b forms an inclination angle with respect to the axial direction of the casing 10 . Therefore, each guide ring 15a, 15b can guide the airflow to its inner area 17, that is, directly below the base 13 of the casing 10, so as to relatively increase the heat dissipation efficiency of the object directly below the base 13 to dissipate heat . Furthermore, along the inclination direction of each guide ring 15a, 15b, each guide ring 15a, 15b forms various inclination angles, so as to relatively increase the wind pressure at the air outlet 12 . On the other hand, since the inner area 17 near the air outlet 12, the downward extension and inclination of the guide rings 15a, 15b also have a supercharging effect, therefore, the air outlet 12 near the air outlet 12 can be relatively promoted. The airflow in the outer area 16 flows inward, and the airflow can be concentrated for heat dissipation.

Please refer to Fig. 10 again, the structure of the fourth embodiment of the present invention is basically the same as that of the first to third embodiments, the difference is that it is provided with two guide rings 15' and 15a, and the guide ring 15' is set There is an inner ring surface 151 and an outer ring surface 152 . The inner ring surface 151 extends downwards and slopes toward the inner diameter direction, and the outer ring surface 152 extends downwards and slopes toward the outer diameter direction. The cross-section of the guide ring 15' is preferably triangular, and the inner ring surface 151 and the outer ring surface 152 of the guide ring 15' are connected to each other by a ring ridge 153. Thus, the guide ring 15' guides the airflow into an inner area 17 and an outer area 16, respectively. The inner area 17 faces directly below the base 13 ; and the outer area 16 faces outside the outer diameter direction of the air outlet 12 . It can expand the heat dissipation range and relatively increase the heat dissipation efficiency of the object directly under the base 13 to dissipate heat. The inner ring surface 151 and the outer ring surface 152 of the guide ring 15 and the guide ring 15' have various inclination angles. Therefore, the cross-sectional area of the air outlet side can be relatively reduced, so the two guide rings 15a, 15' also have the effect of increasing the wind pressure at the air outlet 12.

Please refer to FIGS. 11-13 again, the structure of the fifth embodiment of the present invention is basically the same as that of the first to fourth embodiments, except that it is provided with four guide rings. Each rib 14 is provided with a pair of first group of guide rings 15a, 15a' and a pair of second group of guide rings 15b, 15b', the first group and the second group of guide rings 15a, 15a', 15b, The ring 15 b ′ is disposed between the base 13 and the casing 10 and extends through each rib 14 . Moreover, the second set of guide rings 15b, 15b' is located between the base 13 and the first set of guide rings 15a, 15a'.

The first set of guide rings 15a, 15a' extends downward relative to the axial direction of the casing 10 and is inclined toward the inner diameter direction, and the first set of guide rings 15a, 15a' have various inclination angles. The second set of guide rings 15b, 15b' extends downward relative to the axial direction of the casing 10 and is inclined toward the outer diameter direction, and the second set of guide rings 15b, 15b' have different inclination angles. A gap 19 is formed between the first set of guide rings 15a and the second set of guide rings 15b (as shown in FIG. 13 ), and each rib is inclined along the direction of the blades driving the wind of the fan wheel.

Therefore, the first and second sets of guide rings 15a, 15a', 15b, 15b' guide the airflow to the middle area 18 directly below the gap 19, that is, the first and second sets of guide rings 15a, 15a', 15b , 15b', in order to concentrate the heat dissipation airflow, and further increase the heat dissipation effect of the objects to be dissipated in this area. Furthermore, along the inclination directions of the first group and the second group of guide rings 15a, 15a', 15b, 15b', the first group of guide rings 15a, 15a' or the second group of guide rings 15b, 15b' form There are different axial inclinations to increase the wind pressure at the air outlet 12 relatively. On the other hand, since the airflow in the middle area 18 has formed a pressurized state, it can also relatively promote the airflow in the inner area 17 and the outer area 16 to tend to the first set of guide rings 15a, 15a' and the second set of guide rings. The air flows between 15b and 15b', that is, it flows to the area directly below the gap 19, so it is convenient to concentrate the airflow to dissipate heat.

Please refer to FIG. 14 again. The structure of the sixth embodiment of the present invention is basically the same as that of the fifth embodiment, except that the first set of guide rings 15a, 15a' extend downward relative to the axial direction of the air outlet 12. and inclined toward the outer diameter direction, while the second set of guide rings 15 b , 15 b ′ extend downward relative to the axial direction of the air outlet 12 and are inclined toward the inner diameter direction.

Therefore, the airflow in the inner area 17 can be guided directly below the base 13 , and the airflow in the outer area 16 can be guided out of the direction of the outer diameter of the air outlet 12 . Therefore, the heat dissipation fan can expand the heat dissipation range, or be suitable for directing the airflow to the object to be dissipated directly below the air outlet 12 in a limited assembly space, or be suitable for more uniform heat dissipation of a larger-sized object to be dissipated . Moreover, along the inclination direction of the first group and the second group of guide rings 15a, 15a', 15b, 15b', the first group of guide rings 15a, 15a' or the second group of guide rings 15b, 15b 'has various inclination angles to relatively increase the wind pressure at the air outlet 12. On the other hand, since the airflow flowing toward the inner area 17 and the outer area 16 also has a pressurizing effect, it can also relatively promote the intermediate area 18, that is, the first and second guide rings 15a, 15a', The airflow between 15b and 15b' tends to flow directly under the base 13, so that the airflow can be concentrated for heat dissipation.

Please refer to Fig. 15 again, the structure of the seventh embodiment of the present invention is basically the same as that of the fifth and sixth embodiments, except that the first guide ring 15' is provided with an inner ring surface 154 and an outer ring surface 155. The inner ring surface 154 extends downwards and slopes toward the inner diameter direction, and the outer ring surface 155 extends downwards and slopes toward the outer diameter direction. The cross-section of the first guide ring 15' is preferably triangular, and the inner ring surface 154 and the outer ring surface 155 of the first guide ring 15' are connected to each other by a ring ridge 158. The second guide ring 15" is provided with an inner ring surface 156 and an outer ring surface 157, the inner ring surface 156 extends downward and is inclined to the inner diameter direction, and the outer ring surface 157 is inclined to the outer diameter direction. The second guide The cross-section of the flow ring 15" is preferably triangular. The inner ring surface 156 and the outer ring surface 157 of the second flow guide ring 15" are connected to each other by a ring ridge 159. The first and second flow guide rings 15' , 15" inner ring surfaces 154, 156 can be various axial inclination angles. The outer ring surfaces 155, 157 of the first and second guide rings 15', 15" can also be provided with various axial inclination angles.

Therefore, the first and second guide rings 15', 15" can guide the airflow to an inner area 17, an intermediate area 18 and an outer area 16 respectively. The inner area 17 faces directly below the base 13; The middle area 18 is located between the first and second deflector rings 15 ′, 15 ″; the outer area 16 faces outside the outer diameter direction of the air outlet 12 . Therefore, the heat dissipation range can be expanded. Moreover, along the inclination direction of the first and second guide rings 15', 15", the inner ring surfaces 154, 156 or outer ring surfaces 155, 157 of the first and second guide rings 15', 15" have Various inclination angles are used to relatively reduce the cross-sectional area of the wind outlet side, so it also has the effect of increasing the wind pressure.

In addition, as shown in Figures 2-15, the present invention guides the flow direction of the airflow through at least two guide rings 15, and the number, inclination direction and inclination angle of the guide rings 15 can be determined according to the blades 21 of the fan wheel 20 and the desired The size, location, shape, and heat dissipation requirements of heat dissipation objects (such as heat dissipation fins) can be changed. Therefore, the margin of assembly and design can also be relatively increased.

As mentioned above, compared with the disadvantages of conventional cooling fan casings that easily form turbulent flow and turbulent flow at the air outlet, and cannot guide the flow direction of the airflow and increase the wind pressure, the present invention can clearly solve the problem by using the air outlet 12 of the casing 10 set at least two deflector rings 15, so that the heat dissipation

The fan outlet 12 has the functions of guiding the flow direction of the airflow, concentrating the airflow, expanding the heat dissipation range, increasing the wind pressure, reducing the wind shear noise and increasing the assembly design margin.

Although the present invention has been disclosed using the above-mentioned preferred embodiments, it is not intended to limit the specific implementation of the present invention. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. , should be included within the protection scope of this claim.

Claims (23)

1, a kind of heat-dissipating fan of tool flow guiding air outlet, mainly comprise: both sides are respectively equipped with the housing of intake grill and exhaust outlet, one is fixedly arranged on this housing exhaust outlet middle pedestal, each gusset by the number gusset is connected between this housing and the pedestal radially, one fan is set on this pedestal, and this fan has a stator, an impeller and several blades; It is characterized in that:

On each gusset between this pedestal and the housing, coaxial rings is provided with at least two guide rings, forms an axial inclination between each guide ring.

2, the heat-dissipating fan of tool flow guiding air outlet according to claim 1 is characterized in that: one of described each guide ring is parallel to the axial of this heat-dissipating fan exhaust outlet.

3, the heat-dissipating fan of tool flow guiding air outlet according to claim 1 is characterized in that: another guide ring in the described guide ring is axially the extending downwards and tilt to the external diameter direction of this heat-dissipating fan exhaust outlet relatively.

4, the heat-dissipating fan of tool flow guiding air outlet according to claim 1 is characterized in that: described each guide ring is axially the extending downwards and tilt to the external diameter different direction of this housing exhaust outlet relatively, and be formed with axial inclination to each other; Perhaps, each guide ring is axially the extending downwards and tilt to the internal diameter different direction of this housing exhaust outlet relatively, and be formed with axial inclination to each other.

5, the heat-dissipating fan of tool flow guiding air outlet according to claim 1, it is characterized in that: axial formation one inner ring surface and an outer ring surface of relative this heat-dissipating fan exhaust outlet in described each guide ring, this inner ring surface is downward extension and tilts to internal diameter direction, and this outer ring surface is downward extension and tilts to the external diameter direction.

6, the heat-dissipating fan of tool flow guiding air outlet according to claim 5 is characterized in that: the cross section in described each guide ring is triangular shape, and the inner ring surface of this guide ring and outer ring surface are connected to each other by an ansa portion jointly.

7, the heat-dissipating fan of tool flow guiding air outlet according to claim 1 is characterized in that: described each gusset is to form inclination along the blade wind dispelling direction of this impeller.

8, the heat-dissipating fan of tool flow guiding air outlet according to claim 1 is characterized in that: described each guide ring is divided into several gusset sections with this gusset, and each gusset section is formed with axial inclination respectively.

9, the heat-dissipating fan of tool flow guiding air outlet according to claim 1 is characterized in that: described each guide ring forms a circular-arc diversion division on the top near the inlet side.

10, the heat-dissipating fan of tool flow guiding air outlet according to claim 1 and 2 is characterized in that: one of described each guide ring has an axial length and a radial width, and this axial length is greater than this radial width.

11, a kind of heat-dissipating fan of tool flow guiding air outlet, mainly comprise: both sides are respectively equipped with the housing of intake grill and exhaust outlet, one is fixedly arranged on this housing exhaust outlet middle pedestal, each gusset by the number gusset is connected between this housing and the pedestal radially, one fan is set on this pedestal, and this fan has a stator, an impeller and several blades; It is characterized in that:

On each gusset between this pedestal and the housing, be equipped with at least two first guide rings and at least two second guide rings, and each second guide ring is located between each first guide ring and the pedestal:

Reach the axial formation axial inclination of relative this housing between each second guide ring between each first guide ring.

12, the heat-dissipating fan of tool flow guiding air outlet according to claim 11, it is characterized in that: described each first guide ring is axially the extending downwards and tilt to the external diameter direction of this housing exhaust outlet relatively, and each second guide ring is axially the extending downwards and tilt to internal diameter direction of this housing exhaust outlet relatively.

13, the heat-dissipating fan of tool flow guiding air outlet according to claim 11, it is characterized in that: described each first guide ring is axially the extending downwards and tilt to internal diameter direction of this housing exhaust outlet relatively, and this second guide ring is axially the extending downwards and tilt to the external diameter direction of this housing exhaust outlet relatively.

14, the heat-dissipating fan of tool flow guiding air outlet according to claim 11 is characterized in that: described each gusset is along the blade wind dispelling direction of this impeller and form inclination.

15, the heat-dissipating fan of tool flow guiding air outlet according to claim 11 is characterized in that: described each first and second guide ring is divided into several gusset sections with each gusset, and each gusset section is formed with axial inclination respectively.

16, the heat-dissipating fan of tool flow guiding air outlet according to claim 11 is characterized in that: described each first and second guide ring forms a circular-arc diversion division on the top near the inlet side.

17, the heat-dissipating fan of tool flow guiding air outlet according to claim 11 is characterized in that: described each first and second guide ring has an axial length and a radial width respectively, and this axial length is greater than this radial width.

18, a kind of heat-dissipating fan of tool flow guiding air outlet, mainly comprise: both sides are respectively equipped with the housing of intake grill and exhaust outlet, one is fixedly arranged on this housing exhaust outlet middle pedestal, each gusset by the number gusset is connected between this housing and the pedestal radially, one fan is set on this pedestal, and this fan has a stator, an impeller and several blades; It is characterized in that:

On each gusset between this pedestal and the housing, be equipped with at least one first guide ring and at least one second guide ring, and second guide ring is located between first guide ring and the housing:

First guide ring is provided with an inner ring surface and an outer ring surface, and this inner ring surface extends downwards and tilts to internal diameter direction, and this outer ring surface extends downwards and tilts to the external diameter direction;

Second guide ring is provided with an inner ring surface and an outer ring surface, and this inner ring surface extends downwards and tilts to internal diameter direction, and this outer ring surface extends downwards and tilts to the external diameter direction;

One relative this housing of the inner ring surface of first and second guide ring, outer ring surface axially be formed with axial inclination.

19, the heat-dissipating fan of tool flow guiding air outlet according to claim 18, it is characterized in that: the inner ring surface of described first and second guide ring relatively this housing axially be formed with axial inclination, the outer ring surface of this first and second guide ring is different axial inclination simultaneously.

20, the heat-dissipating fan of tool flow guiding air outlet according to claim 18 is characterized in that: the cross section of described first guide ring is triangular shape, and the inner ring surface of this first guide ring and outer ring surface are connected to each other by an ansa portion jointly.

21, the heat-dissipating fan of tool flow guiding air outlet according to claim 18 is characterized in that: the cross section of described second guide ring is triangular shape, and the inner ring surface of this second guide ring and outer ring surface are connected to each other by an ansa portion jointly.

22, the heat-dissipating fan of tool flow guiding air outlet according to claim 18 is characterized in that: described each gusset is to form inclination along the blade wind dispelling direction of this impeller.

23, the heat-dissipating fan of tool flow guiding air outlet according to claim 18 is characterized in that: described first and second guide ring is divided into several gusset sections with each gusset, and each gusset section is formed with different axial inclination respectively.

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