CN100380000C - Casing base of axial flow radiating fan - Google Patents

Abstract

A housing seat for an axial flow cooling fan. The present invention is proposed to provide a cooling device component that increases the overall air intake, reduces noise, maintains internal air pressure, and ensures air intake efficiency and air outlet efficiency. The housing seat comprises an annular wall for accommodating a fan motor; the annular wall forms an air inlet and an air outlet; and the annular wall forms a plurality of axial slots arranged axially, wherein the width of the axial slots near the air inlet is greater than the width near the air outlet, so that the axial slots expand toward the air inlet side and contract toward the air outlet side.

Description

Axial fan housing

technical field

The invention belongs to components of a heat dissipation device, in particular to a shell seat of an axial flow heat dissipation fan.

Background technique

Commonly used axial cooling fans, such as the invention patent of US Patent No. 6,132,171 'Blower and Method for Molding Housing Thereof', the housing of the cooling fan includes a ring wall, a base plate and a rotor.

The ring wall is roughly circular and is located on the air inlet side of the shell seat.

The base plate is rectangular and located on the air outlet side of the shell seat.

The rotor is provided with several blades and accommodated in the ring wall.

The ring wall is formed by axially stacking several ring plates, and several long and narrow radial notches are formed between two adjacent ring plates.

When the rotor rotates, the blades of the rotor can inhale the airflow around the casing through the radial slots to increase the overall air intake.

However, since the radial airflow direction sucked by the radial slots and the axial airflow direction of the air inlet almost form a 90° right angle, when the airflow flows between the blades of the rotor and the radial slots, it is very easy to form chaos. flow and turbulence. Furthermore, if the width of the radial slots is too large, it may relatively reduce the pressurization effect of the airflow in the ring wall, thus causing the actual wind-dispelling efficiency to be lower than expected.

Another commonly used axial flow cooling fan, such as US Patent No. 6,710,486 'Housing Structure for a Heat-Dissipation Fan' invention patent, the housing of the cooling fan includes a ring wall, a composite plate and rotor.

The ring wall is further optionally formed with several long and narrow axial notches.

When the rotor rotates, the blades of the rotor can inhale the air flow consistent with the flow direction of the air inlet of the housing seat through the axial slots. Although the shell seat can use the axial slots to increase the air intake, and at the same time relatively reduce the probability of inconsistent flow with the air inlet to reduce noise. However, since the axial slots form a uniform caliber width from the air inlet side to the air outlet side, when the rotor inhales side airflow through the axial slots, it may be sucked in from the position near the air outlet side of the axial slots. The airflow that has just been output from the air outlet of the shell seat, so as to disperse the overall output airflow. Furthermore, if the width of the axial notch is too large, it may still relatively reduce the pressurization effect of the airflow in the ring wall, thus causing the actual wind driving efficiency to be lower than expected. Therefore, it is indeed necessary to further try to improve the structure of the conventional cooling fan housing.

Contents of the invention

The object of the present invention is to provide a housing for an axial cooling fan that increases the overall air intake, reduces noise, maintains internal air pressure, and ensures air intake efficiency and air output efficiency.

The present invention comprises a ring wall for accommodating a fan motor; the ring wall forms an air inlet and an air outlet; several axial slots arranged in the axial direction are formed on the ring wall, and the width of the axial slot near the air inlet is larger than that near the air outlet. Make the axial notch expand in diameter toward the wind-inlet side and shrink in diameter toward the air-outlet side.

in:

The axial notch is a trapezoidal, tapered or horn-shaped oblique expansion.

One side of the axial notch forms a guide slope at the front end in the wind driving direction to smoothly introduce the lateral airflow.

At least two groups of axial slots with decreasing widths are provided on the ring wall from the side near the air inlet to the side near the air outlet.

A reinforcing rib ring is formed between adjacent groups of at least two groups of axial notches to strengthen the structural strength of the ring wall.

The inner wall of the axial notch near the air inlet is recessed to form an extended gap connected to the air inlet of the ring wall.

At least two sets of axial notches together form a tapered shape.

At least two sets of axial notches jointly form an axially inclined corresponding arrangement, so as to smoothly introduce lateral airflow.

The air outlet of the ring wall extends radially outward to form at least one combined plate for fixed assembly.

Since the present invention includes a ring wall for accommodating the fan motor; the ring wall forms an air inlet and an air outlet; several axial slots arranged in the axial direction are formed on the ring wall, and the width of the axial slot near the air inlet is larger than that near the air outlet , making the axial notch expand in diameter toward the air inlet side and shrink in diameter toward the air outlet side. When the axial flow cooling fan motor combined in the housing seat of the axial flow cooling fan of the present invention is in operation, the fan motor will simultaneously suck in the consistent external airflow from the air inlet and the axial slot, and the airflow will be drawn into the same direction by the inlet of the axial slot. The enlarged diameter shape of the air side end can ensure that the fan motor can inhale an additional and sufficient amount of lateral airflow, which will increase the overall air intake; the reduced diameter shape of the air outlet side end of the axial slot is also conducive to proper sealing of the ring wall, The inside of the ring wall 10 tends to form an airflow boosting effect to maintain a higher output wind pressure, and it is beneficial to prevent the axial slot from accidentally sucking the airflow just output from the air outlet of the ring wall 10, so that the axial flow of the present invention can be effectively separated The air flow of the axial notch of the shell seat of the cooling fan and the air outlet can ensure the overall air inlet efficiency and air outlet efficiency of the present invention, and prevent turbulent flow, turbulent flow and turbulent flow to reduce the noise of air inlet and outlet. It not only increases the overall air intake, reduces noise, maintains the internal air pressure, but also ensures the air intake efficiency and air output efficiency, so as to achieve the purpose of the present invention.

Description of drawings

Fig. 1 is a schematic perspective view of the structure of Embodiment 1 of the present invention.

Fig. 2 is a schematic side view of the structure of Embodiment 1 of the present invention.

Fig. 3 is a schematic perspective view of the second embodiment of the present invention.

Fig. 4 is a schematic side view of the second embodiment of the present invention.

Fig. 5 is a schematic side view of the third embodiment of the present invention.

Fig. 6 is a schematic side view of the fourth embodiment of the present invention.

Detailed ways

Embodiment one

As shown in FIG. 1 and FIG. 2 , the casing 1 of the axial flow cooling fan of the present invention includes a ring wall 10 and a plurality of combined plates 12 constituting the main body of the fan motor. The ring wall 10 is roughly circular, and its two ends respectively form an air inlet 101 and an air outlet 102 , and usually a plurality of ribs 103 and a base 104 are provided on the air outlet 102 for connecting the axial cooling fan motor. Several axial notches 11 are formed on the ring wall 10, and the axial notches 11 are arranged on the ring wall 10 at equal intervals along the axial direction for sucking in lateral airflow. The axial notch 11 has an air inlet end 112 near the air inlet 101 and an air outlet end 113 near the air outlet 102 . The width D of the air inlet end 112 is greater than the width d of the air outlet end 113 . That is, the diameter of the axial notch 11 expands toward the wind-inlet side end 112 , and forms a diameter-reduction toward the wind-outlet side end 113 . For example, the axial notch 11 can be selected to form a trapezoidal, conical or trumpet-shaped inclined expansion diameter at the wind inlet side end 112, and the inclined shape is preferably formed at the front end (upstream) of the fan motor in the lateral direction of the wind driving direction, so that Increase the efficiency of lateral air intake as much as possible without affecting the structural strength.

One side of the axial notch 11 can also form a guide slope 111 at the front end in the wind-dispelling direction, so as to smoothly introduce lateral airflow.

Several, such as four, combined plates 12 are respectively formed by extending radially outward from appropriate corners of the air outlet 102 of the ring wall 10, and the combined plates 12 are respectively provided with assembly holes 121 for axially assembling the present invention.

As shown in Figure 2, when the axial flow cooling fan motor combined in the casing 1 of the axial flow cooling fan of the present invention is running, the fan motor will simultaneously suck in the consistent external air flow from the air inlet 101 and the axial notch 11, The enlarged diameter shape of the air inlet side end 112 of the axial notch 11 can ensure that the fan motor can absorb additional and sufficient lateral airflow. Thereby, the axial notches 11 will increase the overall air intake. On the other hand, the reduced-diameter shape of the air outlet side end 113 of the axial notch 11 is also conducive to properly closing the ring wall 10, so that the inside of the ring wall 10 tends to form an airflow boosting effect to maintain a higher output wind pressure. Furthermore, the reduced diameter shape of the air outlet side end 113 of the axial notch 11 is also beneficial to prevent the axial notch 11 from inadvertently inhaling the airflow just output from the air outlet 102 of the ring wall 10, thus effectively distinguishing the axial flow cooling fan of the present invention. The air flow through the axial notch 11 and the air outlet 102 of the shell seat 1. By means of the axial notches 11 arranged at equal intervals along the axial direction on the ring wall 10, the overall air inlet efficiency and air outlet efficiency of the present invention can be ensured, and turbulent flow, turbulent flow and turbulent flow can be prevented to reduce the air inlet and wind noise.

Embodiment two

As shown in FIG. 3 and FIG. 4 , the casing 1 a of the axial flow cooling fan of the present invention includes a ring wall 10 a for accommodating the main body of the fan motor and several composite plates 12 . The ring wall 10a is generally circular, and its two ends respectively form an air inlet 101 and an air outlet 102 , and usually a plurality of ribs 103 and a base 104 are provided on the air outlet 102 for coupling with the axial cooling fan motor. On the ring wall 10a, at least two groups of axial notches 11a, 11a' whose width gradually decreases from the air inlet 101 to the air outlet 102 are provided, and a reinforcing rib ring 13 is formed between two adjacent groups of axial notches 11a, 11a', so as to Strengthen the structural strength of the ring wall 10a. Axial slots 11a, 11a' are arranged at equal intervals along the axial direction on the ring wall 10a for inhaling side airflow. The width of the axial slot 11a near the air inlet 101 side of the ring wall 10a is greater than the width of the axial slot 11a' near the air outlet 102 side of the ring wall 10a. At the same time, the axial notch 11a near the air inlet 101 of the ring wall 10a is recessed on the inner wall to form an extended gap 112' communicating with the air inlet 101 of the ring wall 10a. In this way, the present invention can not only increase the overall air intake, separate the lateral airflow and the airflow at the air outlet, and form an airflow boosting effect, but also increase the smoothness of the airflow between the air inlet 101 and the axial slots 11a, 11a' resistance to reduce wind noise.

Embodiment Three

As shown in FIG. 5 , the casing 1 b of the axial flow cooling fan of the present invention includes a ring wall 10 b for accommodating the main body of the fan motor and several assembly plates 12 . The ring wall 10b is generally circular, and its two ends respectively form an air inlet and an air outlet, and are usually provided with several ribs and a base at the air outlet for coupling with the axial cooling fan motor. At least three groups of axial notches 11b, 11b', 11b" whose width gradually decreases from the air inlet to the air outlet are provided on the ring wall 10b, each adjacent to two groups of axial notches 11b and 11b' and between 11b' and 11b". Strengthening rib rings 13, 13' are formed between them to strengthen the structural strength of the ring wall 10b. Axial notches 11b, 11b', 11b" are arranged at equal intervals along the axial direction on the ring wall 10b for inhaling lateral airflow. The width of the axial notches 11b near the air inlet 101 side of the ring wall 10b is the largest, and the width of the near The width of the axial notch 11b″ on the air outlet 102 side of the ring wall 10b is the smallest. The axial notches 11b, 11b', 11b" together form a conical shape, and can respectively form guide slopes 111, 111', 111" at the front end in the wind driving direction. In this way, the present invention can not only increase the overall air intake, separate the side airflow and the air outlet airflow, and form the airflow supercharging effect, but also can increase the distance between the air inlet 101 and the axial notches 11b, 11b', 11b". The fluency of the airflow reduces the noise of the wind.

Embodiment Four

As shown in FIG. 6 , the casing 1c of the axial flow cooling fan of the present invention includes a ring wall 10c for accommodating the main body of the fan motor and several assembly plates 12 . The ring wall 10c is generally circular, and its two ends respectively form an air inlet and an air outlet, and are usually provided with several ribs and bases at the air outlet for coupling with the axial cooling fan motor. At least three groups of axial notches 11c, 11c', 11c" whose width gradually decreases from the air inlet to the air outlet are set on the ring wall 10c, each adjacent two groups of axial notches 11c and 11c' and between 11c' and 11c". Strengthening rib rings 13, 13' are formed between them to strengthen the structural strength of the ring wall 10c. Axial notches 11c, 11c', 11c" are arranged at equal intervals along the axial direction on the ring wall 10c for inhaling lateral airflow. The width of the axial notches 11c near the air inlet 101 side of the ring wall 10c is the largest, and the width of the near The width of the axial notch 11c" on the air outlet 102 side of the ring wall 10c is the smallest. Axial notches 11c, 11c', 11c" are in the shape of a parallelogram respectively, and together form an axially inclined corresponding setting, so as to smoothly introduce lateral airflow; The front end of the direction forms guide slopes 111, 111', 111". In this way, the present invention can not only increase the overall air intake, separate the side airflow and the air outlet airflow, form the airflow boosting effect, but also increase the air inlet 101 And the fluency of the airflow between the axial notches 11c, 11c', 11c", to reduce the noise of the wind.

As mentioned above, compared with the disadvantages of the conventional axial flow heat dissipation fan housing, which is difficult to simultaneously increase the side air intake and avoid the dispersion of the total output airflow, the present invention as shown in Figure 1 forms an axial slot on the ring wall 11, and make the air inlet side end 112 of the axial notch 11 form an enlarged diameter and the air outlet side end 113 form a reduced diameter, which can indeed increase the overall air intake, separate the lateral airflow and the air outlet airflow, and form an airflow increase. Pressure effect, and can increase the smoothness of the airflow between the air inlet and the axial slot, so as to reduce the noise of the air inlet, thus improving the overall performance of the axial flow cooling fan.

Claims (9)

1. A shell seat of an axial flow cooling fan, which includes a ring wall that accommodates a fan motor; the ring wall forms an air inlet and an air outlet; it is characterized in that several axial grooves arranged axially are formed on the ring wall The width of the axial notch near the air inlet is larger than that near the air outlet, so that the axial notch expands in diameter toward the air inlet side and shrinks in diameter toward the air outlet side. 2 . The casing of an axial flow cooling fan according to claim 1 , wherein the axial notch has a trapezoidal, conical or horn-shaped oblique diameter expansion. 3 . 3 . The housing of an axial flow cooling fan according to claim 1 , wherein one side of the axial notch forms a guide slope at the front end in the wind driving direction to smoothly introduce lateral airflow. 4 . 4 . The casing of an axial flow cooling fan according to claim 1 , wherein at least two groups of axial notches with decreasing widths are provided on the ring wall from the side near the air inlet to the side near the air outlet. 5 . 5. The casing seat of the axial flow cooling fan according to claim 4, characterized in that said at least two groups of axial notches are formed between two adjacent groups of axial notches to strengthen the structural strength of the ring wall. rib ring. 6 . The casing seat of an axial flow cooling fan according to claim 4 , wherein the inner wall of the axial notch near the air inlet is recessed to form an extended gap leading to the air inlet of the ring wall. 7 . 7 . The casing of an axial flow cooling fan according to claim 4 , wherein the at least two groups of axial notches together form a conical shape. 8 . 8 . The casing of an axial flow cooling fan according to claim 4 , wherein the at least two groups of axial notches jointly form an axially inclined corresponding arrangement, so as to smoothly introduce lateral airflow. 9 . 9 . The casing of an axial flow cooling fan according to claim 1 , wherein the air outlet of the ring wall extends radially outward to form at least one combined plate for fixed assembly. 10 .

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