KR20140037578A - 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 has multiple first inner blades and multiple second inner blades, wherein the first inner blades are installed at the side of the central portion of the hub so that the first inner blades are capable of sucking the air to the side of the hub, and the second inner blades are installed at the peripheries of the first inner blades so that the second inner blades are capable of sucking the air to the side of the hub. In addition, the first inner blades have the blade structure of an axial fan and are radially extended from the central portion of the hub toward the outside of the radial direction; and the second inner blades have the blade structure of a multi-blade fan and are radially extended from the peripheries of the first inner blades toward the blades outside the radial 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, is composed of a forward curve (wing) whose tip 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, but has a disadvantage that the static pressure is lowered to decrease 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 blower fan of a multi-fan fan type air conditioner that sucks air and discharges it radially outward, comprising: a plurality of first inner wings installed at a central side portion of the hub to suck air to the hub side portion; ; It characterized in that it comprises a plurality of second inner wings which are installed in the peripheral portion of the first inner wings to suck the air to the hub side portion.

Preferably, the first inner wings have an axial fan-shaped wing structure and extend radially outwardly from a central portion of the hub; The second inner blades have a blade structure of a multi-vane fan type, and are radially extended from the circumference of the first inner wings toward the radially outer wing.

Each of the first inner blades has a structure of a forward curve in which the tip portion is curved at a specific curvature toward the rotation direction, and each of the second inner wings has a tip portion opposite to the rotation direction. It is characterized by having a structure of backward and backward curves (Backward Curve, Backward Inclined) is curved at a specific curvature.

According to the blowing fan of the vehicle air conditioner according to the present invention, since the first and second inner wings are provided in the hub, there is an effect of increasing 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.

Further, the first and second inner blades are provided in the hub, but since the inner blades have a structure capable of increasing the static pressure of the discharged air, there is an effect of increasing the discharge wind pressure of the blower 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 perspective 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) 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 blowing fan of the present invention includes a plurality of first inner wings 40 and first inner wings 40 formed in the cone-shaped central portion 22a of the hub 22. It further comprises a plurality of second inner wings 50 formed around the field.

The first inner wings 40, having a wing structure of an axial fan, extend radially outward from the cone-shaped central portion 22a of the hub 22, and thus extend the first inner side. The vanes 40 are configured such that their tip 42 is connected to each other by an annular band 44.

The first inner blades 40 of the axial fan structure are configured to suck air above the central portion 22a of the hub 22, as shown in FIG. In particular, it is comprised so that the upper air of the center part 22a may be sucked in an axial direction.

Therefore, the air intake rate toward the hub 22 center portion 22a side is increased. As a result, the suction rate of the air is remarkably improved 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.

Meanwhile, each of the first inner blades 40 has a structure of a forward curve in which the tip portion 42 is curved at a specific curvature toward the rotation direction.

In addition, each of the first inner blade 40, the leading edge (Leading Edge) 46 and the trailing edge (Trailing Edge) 48 (wave) toward the opposite direction of rotation of the blowing fan 20 ( Is configured to be waved.

In particular, the leading edge portion 46 and the trailing edge portion 48 are forward curves 46a and 48a (Forward Curve) in the direction of rotation while going from the blade portion 49 to the tip portion 42, and the rotation direction. The backward portions 46b and 48b (Backward Curve) facing in the opposite direction of the wave are formed so as to be sequentially formed.

Therefore, the flow dispersion region D can be formed between the deflecting portions 46a and 48a. As a result, the flow load of air applied to the leading edge portion 46 can be reduced. As a result, it is possible to improve power consumption and blowing noise due to the flow load of air.

The structure of the leading edge portion 46 and the trailing edge portion 48 having such a structure is described in Korean Patent No. 761153 to which the applicant has applied for and registered. Therefore, a detailed description thereof will be omitted.

The second inner blades 50 extend radially from the circumference of the first inner blades 40, as shown in FIGS. 4 to 6. In particular, it extends radially from the annular band 44 of the first inner wings 40 toward the radially outer wing 24.

As such, each of the second inner inner blades 50 protrudes from the upper surface of the hub 22 toward the suction side, and the second inner inner blades 50 protruding from the blades of the multi-vane fan. Has a structure.

Therefore, during the rotational movement, as shown in FIG. 8, the upper portion of the hub 22 is sucked in air, and then discharged to the wing 24 side portion of the radially outer side. This increases the air intake rate toward the hub 22 side. As a result, the blowing performance of the blowing fan 20 is remarkably improved.

On the other hand, the second inner blades 50 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).

Here, the second inner blade 50, as shown in Figures 4 to 6, is configured to gradually widen the wing width toward the tip portion 52, the tip portion of the second inner blade 50 configured as described above 52 is comprised so that it may be mutually connected with the outer blade | wing 24. As shown in FIG.

The blade width of the tip portion 52 is configured to be equal to the height h of the outer blade 24. Therefore, the tip portion 52 of the second inner blade 50 is connected to the same height as the upper edge portion 24b of the blade 24.

In addition, each of the second inner blades 50 is configured such that the leading edge portion 54 of the upper end is formed in an oblique line along the longitudinal direction A1 of the wing.

In particular, the leading edge portion 54 is formed to be inclined upward from the blade portion 56 toward the tip portion 52, and the leading edge portion 54 thus formed is an annular band 44 of the first inner blade 40. ) From the top edge portion 24b of the blade 24 in an oblique line.

In this way, the second inner blades 50 in which the leading edge portion 54 is diagonally formed are configured 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.

In addition, it is preferable that the second inner blades 40 are installed in the number of 1/2 of the number of the outer blades 24.

The reason for this configuration is that if the number of the second inner wings 50 is less than 1/2 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 air is reduced. This is because if the number of the main blades 24 exceeds 1/2, the number of the blades may be so large that the blowing performance of the main blades 24 may be further reduced.

In addition, the second inner blades 50 extend radially from the circumference of the first inner blades 40, and the tip portion 52 is curved with a specific curvature in the direction opposite to the rotation direction. It has the shape of backward curve and backward curve (Backward Inclined).

As such, the second inner blades 50 having a shape of backward and backward curves are configured to increase the static pressure of the sucked air and discharge them. 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.

4 to 6, a plurality of through holes 60 are formed in the hub 22 of the blower fan 20.

The plurality of through holes 60 are formed to correspond to each of the first inner blades 40. In particular, formed in the lower portion of the first inner blade 40, the through-holes 60 formed in this way is configured to communicate with the bottom portion of the hub 22 through the hub 22.

These through holes 60 are configured to introduce air sucked by the first and second inner blades 40, 50 into the underside of the hub 22, as shown in FIG. 8. The air introduced into the bottom portion of the hub 22 can be discharged radially outward by the wings 24 installed around the bottom of the hub 22.

On the other hand, these through holes 60 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 60 at the time of injection molding integrally with the hub 22. Thereby, the mold structure for injection molding of the first inner blade 40 becomes very simple. As a result, a reduction in manufacturing cost can be expected.

6 and 7, a plurality of bottom wings 70 are installed around the bottom edge of the hub 22.

The plurality of bottom wings 70 are formed to correspond to the second inner wings 50 provided on the top surface of the hub 22. In particular, it is configured to correspond to the second inner blades 50 with the hub 22 therebetween.

These bottom blades 70 are configured to suck the lower air and discharge the sucked air radially outward when the blowing fan 20 rotates (see FIG. 8).

Accordingly, the blowing efficiency of the air is increased together with the upper first and second inner blades 40 and 50. This significantly improves the blowing performance of the blowing fan 20.

In addition, the bottom blades 70 also discharge the air introduced into the bottom portion of the hub 22 through the through holes 60 to the radially outward. Therefore, the blowing efficiency of air is further increased.

On the other hand, the bottom blades 70, like the second inner blade 50 has a shape of the rear and rear curve that the tip portion 72 is curved with a specific curvature toward the opposite direction of rotation.

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 70 extend from the inner side of the bottom of the hub 22 toward the radially outer wing 24, and is configured to gradually widen the wing width toward the tip portion 72.

And the tip portion 72 of the bottom wings 70, is configured to be connected to each other with the wing 24 of the outside.

According to this invention of such a structure, since the 1st and 2nd inner side wings 40 and 50 are 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 first and second inner blades (40, 50) are provided in the hub 22, but since these inner blades (40, 50) can increase the static pressure of the discharge air, the blower fan 20 is discharged Wind pressure can be increased.

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 70 is further installed on the hub 22, the air flow rate, wind speed, and wind pressure of the discharge air are further increased, thereby maximizing the blowing performance of the blowing fan 20.

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: first inner wing 42: tip part
44: annular band 46: leading edge
48: trailing edge 49: root region
50: second inner wing 52: tip
54: leading edge part 56: root region
60: through hole 70: bottom wing
72: tip

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,
A plurality of first inner blades (40) installed at the central portion (22a) side of the hub (22) to suck air into the hub (22) side portion;
Blowing fan of the vehicle air conditioner, characterized in that it comprises a plurality of second inner blades 50 which are installed in the peripheral portion of the first inner blades 40 to suck the air to the hub 22 side portion . The method of claim 1,
The first inner blades (40) have a wing structure of an axial fan type and extend radially outwardly from a central portion (22a) portion of the hub (22);
The second inner blades 50 have a wing structure of a multi-vane fan type, and extend radially from the circumference of the first inner blades 40 toward the radially outer wing 24. Blowing fan of the vehicle air conditioner characterized in that. 3. The method of claim 2,
Each of the first inner blades 40 has a forward curve structure in which the tip portion 42 is curved at a specific curvature in the direction of rotation.
Each of the second inner blades 50 has a structure of backward and backward curves in which the tip portion 52 is curved at a specific curvature in the opposite direction of the rotation direction. Blower fan of air conditioning system. The method of claim 3, wherein
Each of the first inner blades 40,
The leading edge 46 and the trailing edge 48 are turned toward the tip portion 42 from the root portion 49 of the longitudinal direction A to the tip portion 42 in the direction of rotation ( 46a, 48a (Forward Curve), and the rear fan (46b, 48b) (Backward Curve) facing in the opposite direction of the rotation direction so as to be formed so as to be sequentially formed blower fan of the vehicle air conditioner. The method of claim 3, wherein
Each of the second inner wings 50,
The blade width gradually widens toward the tip portion 52, and the tip portion 52 is blower fan of the air conditioner for a vehicle, characterized in that connected to each other with the outer blade (24). 6. The method of claim 5,
The second inner wings 50,
Blowing fan of the vehicle air conditioner, characterized in that installed in the number of 1/2 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 60 formed in the hub 22,
The through-holes (60) of the blowing fan of the vehicle air conditioner, characterized in that the air sucked by the first and second inner blades (40, 50) flows into the bottom portion of the hub (22). 8. The method of claim 7,
The through holes 60,
Blowing fan of the vehicle air conditioner, characterized in that formed on the lower portion of each of the first inner blade (40). 8. The method of claim 7,
Further comprising a plurality of bottom wings 70 are installed on the bottom portion of the hub 22 to correspond to the second inner wings 50 with the hub 22 therebetween,
The bottom blades (70), 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 (60) to the radially outward.

Images