KR20140037577A - Blower fan of air conditioning system for automotive vehicles - Google Patents

Abstract

The present invention relates to a blowing fan of an air conditioner for a vehicle. The purpose of the present invention is to provide a blowing fan of an air conditioner for a vehicle, wherein the blowing fan has an improved structure for increasing an air suction rate and the static pressure of discharge air so that the volume, the velocity, and the pressure of the discharge air can be largely improved. A multi-blade type blowing fan of an air conditioner for a vehicle according to the present invention for the purpose has a conical hub at the center thereof and multiple blades which are installed along the periphery of the hub at regular distances and discharge air to the outside of a radial direction after sucking the air from the upper side of the hub, and further has multiple inner blades which are installed to protrude from the upper side of the hub to the suction direction of the air so that the inner blades are capable of discharging the air to the blades outside the radial direction after sucking the air to the side of the hub, wherein the inner blade has a leading edge which is formed at the top there of and is curved in a certain direction so that the flowing direction of the air can be guided in an axial direction when the blowing fan rotates. In addition, the inner blades are radially extended from the central portion of the conical hub toward the blades outside the radial direction, and have widths which become wider gradually toward the blade tips thereof. Furthermore, each of the inner blades has a backward curved and backward inclined shape of which the blade tip is curved with a certain curvature toward the opposite direction of a rotating direction.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a blower fan for an air-

The present invention relates to a blower fan of a vehicle air conditioner, and more particularly, to improve the air intake rate and the static pressure of the discharged air through a structural improvement, thereby significantly improving the air flow rate, wind speed and wind pressure of the discharged air. It relates to a blowing fan of a vehicle air conditioner.

The car is equipped with an air conditioner to cool and heat the room. As shown in FIGS. 1 and 2, the air conditioner includes a blower 1 that sucks inside and outside air and blows the air into the vehicle interior.

The blower 1 includes a scroll casing 10, a blowing fan 20 provided in the blowing chamber 12 of the scroll casing 10, and a blowing motor 30 for driving the blowing fan 20. .

Blower fan 20 is a multi-vane fan (Multi Vane Fan), as shown in Figs. 2 and 3, the hub (22) in the center and a plurality of blades provided around the hub (22) And (24).

The hub 22 has a cone type center portion 22a to which the shaft 32 of the blower motor 30 is fixed, and an extension portion 22b extending radially outward from the edge circumference of the cone type center portion 22a. It consists of.

The vanes 24 rotate simultaneously as the hub 22 is rotated, and the vanes 24 which rotate in this manner, as shown in FIGS. 1 and 2, have an inlet 12a of the blower chamber 12. The side air is sucked in, and the sucked air is blown to the outlet 12b side of the blower chamber 12.

In particular, the plurality of wings 24, in the process of rotating at a high speed around the hub 22, sucks the air inlet 12a side of the blowing chamber 12 into the inner portion of the wings 24, so The sucked air is discharged radially outward while hitting the upper surface of the cone-shaped hub 22, and the discharged air is blown to the outlet 12b side of the blowing chamber 12.

On the other hand, the blades 24, as shown in Figure 3, the tip portion is composed of a forward curve (bend curve) that is bent in the direction of rotation. The reason for this configuration is that, when the vanes 24 are configured as the deflector, the air pressure of the fluid is increased to increase the discharge air volume of the air, thereby increasing the amount of air blown into the cabin.

For reference, Velocity Pressure is a total pressure of the blowing fan 20 together with the static pressure, and is related to the discharge air volume and the wind speed of the blowing fan 20. In particular, the discharge wind volume and the wind speed of the blower fan 20 are increased in proportion to the size thereof, and the increased discharge wind volume increases the amount of air blown into the vehicle cabin.

On the contrary, the static pressure is related to the discharge wind pressure of the blower fan 20, and the discharge wind pressure of the blower fan 20 is increased in proportion to the size of the blower fan 20. Increase resistance to resistors, ie evaporators (not shown). This allows a large amount of air to be blown through the evaporator and into the cabin.

In general, the blower fan 20 of the air conditioning apparatus should have a high dynamic pressure of air in order to obtain a large discharge air volume and a high wind speed, but should also have a high static pressure of air in order to obtain a high discharge wind pressure. This is because the discharge air of the blower fan 20 can be smoothly blown into the vehicle interior, overcoming the resistance of the evaporator.

By the way, in the conventional blower fan 20, since the blades 24 are composed of a deflector, the dynamic pressure of the air is increased, the discharge air volume and the wind speed of the air is increased, but the static pressure of the air is relatively low, the downstream side There is a disadvantage in that the ability to counteract the evaporator is lowered.

That is, as described above, the blowing fan 20 having the blades 24 of the turning target, the dynamic pressure is increased to increase the discharge air volume and the wind speed of the air, but has a disadvantage that the static pressure is lowered to reduce the discharge wind pressure.

And because of these disadvantages there is a problem that the ability to counter the evaporator is installed downstream, thereby reducing the amount of air passing through the evaporator. And this drawback is pointed out the drawback that the cooling and heating efficiency in the interior is significantly reduced.

In addition, the conventional blower fan 20, as shown in Figure 2, has the disadvantage that the air is concentrated intake only to the edge portion around which the blades 24 are formed during rotation. In particular, there is a disadvantage that the suction is concentrated only to the inner edge (Edge) portion of the wings 24, there is a problem that the suction efficiency of the air is low because of this disadvantage.

And it is pointed out that there is a limit to improve the blowing performance of the blowing fan 20 due to this problem.

The present invention has been made to solve the above-mentioned conventional problems, an object of the present invention is to provide a blower fan of the vehicle air conditioner that can increase the dynamic pressure of the discharged air by improving the structure.

SUMMARY OF THE INVENTION An object of the present invention is to provide a blower fan for an air conditioner for a vehicle that can increase the discharge wind pressure of air by being configured to increase the dynamic pressure of the discharged air.

Still another object of the present invention is to provide an air discharge apparatus for increasing the air discharge pressure, so that the air blowing capacity of the downstream evaporator can be improved, and thus the vehicle air conditioner can improve the cooling and heating efficiency in the vehicle interior. To provide a blower fan.

Still another object of the present invention is to provide a blower fan for an air conditioner for a vehicle that can improve the suction efficiency of air through structural improvement.

It is still another object of the present invention to provide a blower fan for an air conditioner for a vehicle that can be configured to increase the suction efficiency of the air, thereby significantly improving the blowing performance of the air.

In order to achieve this object, the blowing fan of the vehicle air conditioner according to the present invention, the central cone-shaped hub and a plurality of wings are installed at regular intervals along the circumference of the hub, the wings are the upper side of the hub A blowing fan of a multi-fan fan type air conditioner that sucks air and discharges it radially outward, wherein the air is drawn from the upper surface portion of the hub to suck air into the hub side and discharge the air toward the blades outside the radial direction. It is installed to protrude toward the suction direction of the, the leading edge portion (Leading Edge) of the upper portion is curved in a specific direction further comprises a plurality of inner wings for guiding the flow direction of the air in the axial direction during rotation do.

Preferably, the inner wings extend radially from the cone-shaped central portion of the hub toward the radially outer wing, characterized in that the wing width gradually increases toward the tip.

Each of the inner blades has a shape of a backward curve and a backward curve in which the tip portion is curved at a specific curvature toward the opposite direction of the rotation direction.

According to the blowing fan of the vehicle air conditioner according to the present invention, since the inner blade is provided in the hub, there is an effect that can increase the air intake rate to the hub side.

In addition, since the air intake rate to the hub side can be increased, there is an effect of remarkably improving the discharge air volume and the wind speed of the blower fan.

In addition, the inner blade is installed in the hub, but the inner blade has a structure that can increase the static pressure of the discharge air, there is an effect that can increase the discharge wind pressure of the blowing fan.

In addition, since the discharge wind pressure of the blower fan can be increased, the blowing ability of the downstream evaporator can be improved, and therefore, there is an effect of improving the cooling and heating efficiency in the vehicle interior.

In addition, the bottom wing is further installed on the hub, and through this structure, the air volume, the wind speed, and the air pressure of the discharge air are further increased, thereby maximizing the blowing performance of the blowing fan.

1 is a perspective view of an air conditioner showing a state in which a blowing fan of a conventional vehicle air conditioner is installed,
2 is a cross-sectional view of an air conditioner showing a state in which a blowing fan of a conventional vehicle air conditioner is installed;
3 is a cross-sectional view taken along line III-III of FIG. 2 showing a state in which a blowing fan of a conventional vehicle air conditioner is installed;
4 is a perspective view showing a blowing fan of the vehicle air conditioner according to the present invention;
5 is a plan sectional view showing a blowing fan of the vehicle air conditioner according to the present invention;
Figure 6 is a side cross-sectional view showing a blowing fan of the vehicle air conditioner according to the present invention,
7 is a bottom view showing a blowing fan of a vehicle air conditioner according to the present invention;
8 is a view showing an operation example of the blowing fan according to the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of a blowing fan of an air conditioner for a vehicle according to the present invention will be described in detail with reference to the accompanying drawings (the same components will be described using the same reference numerals).

First, prior to looking at the features of the blower fan according to the present invention, a brief description of the blower fan of the air conditioning apparatus with reference to FIGS.

The blower fan 20 has a hub 22 in the center and a plurality of wings 24 provided around the hub 22.

The hub 22 has a cone-shaped central portion 22a to which the shaft 32 of the blower motor 30 (see FIG. 2) is fixed, and extends radially outward from the periphery of the edge of the cone-shaped central portion 22a and lifts the wings 24. It consists of the extension part 22b which supports.

The blades 24 suck the upper air while simultaneously rotating as the hub 22 rotates, and blows the sucked air radially outward.

At this time, the air sucked into the inner portion of the wings (24) is discharged radially outward while hitting the upper surface of the cone-shaped hub (22).

On the other hand, the wings 24, as shown in Figure 5, the tip portion 24a is composed of a forward curve (bend curve) bent in the direction of rotation. Therefore, the air discharged by the blades 24 has a high dynamic pressure, whereby the discharge air volume and the wind speed of the blower fan 20 are increased.

Next, the features of the blowing fan according to the present invention will be described in detail with reference to FIGS. 4 to 8.

First, referring to FIGS. 4 to 6, the blower fan of the present invention further includes a plurality of inner blades 40 installed on the top surface of the hub 22.

Each inner blade 40 is installed to protrude from the upper surface of the hub 22 toward the intake side of the air, the inner blades 40 thus installed are installed at equal intervals along the circumferential direction of the hub 22. .

Here, each inner blade 40 extends radially from the cone-shaped central portion 22a portion of the hub 22 toward the radially outer wing 24, each of the inner blades 40 so extended, the tip It is configured to gradually widen the wing width toward the portion 42.

These inner blades 40, when the blowing fan 20 is rotated, as shown in Figure 8, is configured to suck the upper air. In particular, it is comprised so that a large amount of air may be inhaled to the center part 22a side part of the hub 22.

Therefore, the suction rate of air is raised. As a result, the suction rate of the air is significantly increased as compared with the conventional blower fan 20 which sucks only the vanes 24. As a result, the blowing performance of the blowing fan 20 is remarkably improved.

On the other hand, the inner blades 40 which sucked air discharge the sucked air to the radially outer side. In particular, it is discharged to the wings (24) installed in the outer portion, the air discharged in this way is discharged at high speed as the wind speed is increased by the outer wings (24).

5 and 6, the inner blades 40 are formed in the hub 22, and the tip portion 42 of the longitudinal direction A1 has a specific curvature toward the opposite direction of the rotation direction. It has the shape of curved backward and backward curve (Backward Inclined).

In this way, the inner blades 40 having the shape of the backward and backward curve, is configured to discharge the discharged by increasing the static pressure (Static Pressure) of the intake air. Therefore, the discharge wind pressure of air is raised.

This improves the blowing capacity to the downstream resistor, that is, the evaporator. As a result, a large amount of air can overcome the resistance of the evaporator and reach the interior of the vehicle. This improves the cooling and heating efficiency in the vehicle interior.

For reference, it is known that the wings of the rearward and backward grains are very advantageous for increasing the static pressure of air. Since such data is already known, a detailed description thereof will be omitted.

Again, referring to FIGS. 4 to 6, each of the inner blades 40 is formed in the hub 22, and the leading edge 44 of the upper portion of the width direction A2 rotates in the rotational direction. It is configured to be bent at a certain curvature towards.

The reason for this configuration is to form the shape of the inner blade 40 in the shape of the blade of the axial fan (Axial Fan), which induces the flow direction of air in the axial direction during the rotation of the blowing fan 20, This is to increase the air blowing amount.

Preferably, each of the inner blade 40, only the leading edge portion 44 of the total blade width is curved at a specific curvature toward the rotation direction, the remaining portion is configured to be perpendicular to the rotation direction Good (see FIG. 6).

Again, referring to FIGS. 4 to 6, each of the inner blades 40 is configured such that the leading edge portion 44 of the upper end is formed in an oblique line along the longitudinal direction A1.

In particular, the leading edge portion 44 is formed to be inclined upward from the blade portion 46 in the longitudinal direction A toward the tip portion 42, and the leading edge portion 44 thus formed is the cone-shaped central portion of the hub 22. It consists of diagonal lines from 22a to the upper edge part 24b of the blade | wing 24.

Here, the tip portion 42 of the leading edge portion 44 is preferably connected to the upper inner edge portion 24b of the blade 24.

As such, the inner blades 40 with the leading edge portion 44 formed obliquely are configured so as not to interfere with the air suction action of the outer main blades 24 when rotating. Therefore, the blowing performance of the wings 24 is not reduced.

On the other hand, the inner blades 40 of such a configuration, it is preferable to be installed in the number of 1/4 to 1/3 range of the number of the outer main blades 24.

The reason for this configuration is that if the number of the inner blades 40 is less than 1/4 of the number of the main blades 24 on the outside, the number of the blades is so small that the synergistic effect of the intake rate and blowing rate of the air is reduced. This is because if the number of the wings 24 is more than one third, the number of the wings is so large that the blowing performance of the main wings 24 can be further reduced.

4 to 6, a plurality of through holes 50 are formed in the hub 22 of the blower fan 20.

The plurality of through holes 50 are formed to correspond to the inner blades 40. In particular, formed in the lower portion of each inner blade 40, the through holes 50 formed in this way, is configured to communicate with the bottom portion of the hub 22 through the hub 22.

These through holes 50 are configured to introduce the air sucked by the inner blades 40 into the bottom portion of the hub 22, as shown in FIG. The air introduced into the bottom portion of the hub 22 can be discharged radially outward by the wings 24 around the bottom of the hub 22.

On the other hand, these through holes 50 are preferably configured in the plane projection shape of the inner blade (40). This is to configure the inner blade 40 to be molded through the through-hole 50 when the inner blade 40 is integrally injection molded with the hub 22, and thus, a mold for injection molding of the inner blade 40. The structure is very simple. As a result, a reduction in manufacturing cost can be expected.

6 and 7, a plurality of bottom wings 60 are installed on the bottom surface of the hub 22.

The plurality of bottom wings 60 are formed to correspond to the inner blade 40 provided on the upper surface of the hub 22. In particular, the hub 22 is interposed between the inner blades 40 are configured symmetrically.

These bottom wings 60 are configured to suck the lower air and discharge the sucked air radially outward, as shown in FIG. 8, when the blowing fan 20 is rotated.

Therefore, the blowing efficiency of air is raised with the inner blade 40 on the upper side. This significantly improves the blowing performance of the blowing fan 20.

In addition, the bottom blades 60 also discharge the air introduced into the bottom portion of the hub 22 through the through holes 50 radially outward. Therefore, the blowing efficiency of air is further increased.

On the other hand, the bottom blades 60, like the inner blades 40 has a shape of the rear and rear curves in which the longitudinal tip 62 of the longitudinal direction is curved with a specific curvature toward the opposite direction of the rotation direction.

Therefore, the static pressure of the intake air is increased to discharge. Therefore, the discharge wind pressure of air is raised.

In addition, the bottom wings 60, the leading edge (Leading Edge) 64 is configured to be curved with a specific curvature in the direction of rotation.

Accordingly, the bottom wings 60 have a wing shape of the axial fan. Thus, when the blowing fan 20 rotates, the flow direction of the air is guided in the axial direction, thereby increasing the blowing amount of the air.

In addition, the bottom wings 60, the leading edge portion 64 of the lower end is configured to be formed in an oblique line along the longitudinal direction. In particular, the leading edge 64 is diagonally formed from the cone-shaped center portion 22a of the hub 22 to the lower edge portion of the blade 24.

Therefore, during the rotation of the blower fan 20, the air suction of the outer blades 24 is not disturbed.

According to this invention of such a structure, since the inner blade 40 is provided in the hub 22, the air suction rate to the hub 22 side can be improved.

In addition, since the air intake rate toward the hub 22 can be increased, the discharge air volume and the wind speed of the blower fan 20 can be remarkably improved.

In addition, the inner blade 40 is installed on the hub 22, but the inner blade 40 has a structure that can increase the static pressure of the discharge air, it is possible to increase the discharge wind pressure of the blower fan (20).

In addition, since the discharge wind pressure of the blower fan 20 can be increased, the blowing ability for the downstream evaporator can be improved, and thus, the cooling and heating efficiency in the vehicle compartment can be improved.

In addition, since the bottom blade 60 is further installed on the hub 22, and thus the air volume, wind speed, and wind pressure of the discharged air are further increased, the blowing performance of the blowing fan 20 can be maximized.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.

1: Blower 10: Scroll Casing
12: Blower room 20: Blower fan (Fan)
22: Hub 22a: Center of Cone Type
24: wing 30: blower motor
40: inner blade 42: tip
44: leading edge 46: the root part
50: through hole 60: bottom wing
62: tip 64: leading edge

Claims (9)

A central cone-shaped hub 22 and a plurality of wings 24 are installed at regular intervals along the circumference of the hub 22, the blades 24 suck the air above the hub 22 In the blower fan of a multi-fan fan type air conditioner for discharging radially outward,
It is installed to protrude toward the suction direction of the air from the upper surface portion of the hub 22 so as to suck the air into the hub 22 side portion and to discharge to the blades 24 of the radially outer side, the top of the leading Blowing fan of the air conditioner for a vehicle, characterized in that the edge portion (Leading Edge) 44 is further curved in a specific direction to guide the flow direction of the air in the axial direction when rotating further . The method of claim 1,
The inner blades 40,
The radially extending from the cone-shaped center portion 22a of the hub 22 toward the radially outer wing 24, the air blower of the vehicle air conditioner, characterized in that the wing width gradually widens toward the tip 42 Pan. 3. The method of claim 2,
Each of the inner blades 40,
Blowing fan of the vehicle air conditioning apparatus, characterized in that the tip portion (42) has a shape of backward and backward (Backward Curve, Backward Inclined) is curved in a specific curvature toward the opposite direction of the rotation direction. The method of claim 3, wherein
Each of the inner blades 40,
Wherein a portion of the leading edge portion (44) of the entire wing width is curved at a specific curvature toward the rotating direction, and the remaining portion is formed at a right angle to the rotating direction. 5. The method of claim 4,
The leading edge portion 44 of each inner blade 40,
Inclined in the form of an oblique line toward the upper end of the blade 24 from the blade portion 46 of the cone-shaped central portion 22a side of the hub 22 to the tip portion 42 of the blade 24 side. Blowing fan of the vehicle air conditioner, characterized in that. 6. The method of claim 5,
The inner blades 40,
Blowing fan of the vehicle air conditioner, characterized in that installed in the number of the range of 1/4 to 1/3 of the number of the outer wing (24). 7. The method according to any one of claims 1 to 6,
Further comprising a plurality of through holes 50 formed in the hub 22 so as to correspond to each inner blade 40,
The through-holes (50) of the blowing fan of the vehicle air conditioner, characterized in that the air sucked by the inner blades (40) to flow into the bottom portion of the hub (22). 8. The method of claim 7,
Further comprising a plurality of bottom wings 60 which are installed on the bottom portion of the hub 22 so as to correspond to the inner blades 40 with the hub 22 therebetween,
The bottom blades (60), the blowing fan of the vehicle air conditioner, characterized in that for blowing air introduced into the bottom portion of the hub through the through holes (50) to the radially outward. The method of claim 8,
Each of the bottom blades (60)
The longitudinal tip 62 in the longitudinal direction has a shape of backwards and backwards curved at a specific curvature toward the opposite direction of rotation;
A leading leading edge 64 is bent at a specific curvature toward the rotational direction, leading to an axial direction of air flow during rotation;
The leading edge 64 is diagonally directed toward the lower end of the blade 24 from the blade portion of the cone-shaped central portion 22a side of the hub 22 to the tip portion 62 of the blade 24 side. Blowing fan of the vehicle air conditioner, characterized in that inclined in the form.

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