KR19990019241U - Blower Fans for Automotive Air Conditioners - Google Patents

Abstract

1. The technical field to which the invention described in the claims belongs.

The present invention relates to a blower fan for an automotive air conditioner.

2. The technical problem the invention is trying to solve.

Ribs are formed on the outer periphery of the upper frame, which forms the basis of the blower fan, to prevent the interference between the orifice and the fan, while minimizing the gap between the upper end and the air blower to increase the efficiency and reduce the noise.

3. Summary of the solution of the design.

In constructing a blower fan assembly for use in an automotive air conditioning apparatus;

The blower fan assembly 3 is equipped with a ball mouth 32 having an orifice 31 inside the suction port 30 and a blower fan 33 at a lower end thereof, and the blower fan 33 is disposed at an outer circumference of the upper frame. A rib is formed to fix the orifice 31 so as to surround it, and the rib 35 is formed by applying a round r to the bent portion to reduce the inflow resistance of the intake air.

4. Significant Uses of the Invention.

The blower fan for the automotive air conditioner of the present invention is easy to change the shape of the fan and orifice as the gap is reduced, the air blowing capacity is increased, the amount of loss is reduced, the noise is reduced, and the driving comfort by quiet operation is guaranteed It is a useful design to provide.

Description

Blower Fans for Automotive Air Conditioners

The present invention relates to a blower fan for an automotive air conditioner, and more particularly, to reduce the noise and increase the blowing capacity by improving the shape of the blower fan.

Vehicles are equipped with air conditioning systems and air conditioning units, such as air conditioning systems and heater units, to control the room temperature during the summer or winter months.

The air conditioning apparatus generates air of a required type while passing air introduced from the outside through various apparatuses, and the generated air is introduced into the room by a forced blower by a blower fan assembly.

The blower fan 1 of the blower fan assembly used for forced air of the air generated by the air conditioner as described above has a plurality of blades in the longitudinal direction between the upper and lower frames 10 and 11 as shown in FIG. 12 is formed at uniform intervals, the lower frame 11 is provided with a rib 13 for reinforcing the torsional strength of the fan 1, the center of the rib 13 is necessary for connection with the motor shaft The fixing hole 14 is located.

Since the rib 13 in which the fixing hole 14 is formed is formed using a thin plate, brittleness occurs around the fixing hole 14. To prevent this, a hub 15 is added around the fixing hole 14. The brittleness of the ribs 13 is compensated for.

The blower fan 1 configured as described above is mounted and driven in the case 20 as shown in FIG. 2, and the blower fan 1 discharges air sucked in the axial direction in a direction perpendicular to the axial direction due to its characteristics. In this case, the suction port 21 is provided with an orifice 22 having a constant curvature r inside the suction port 21 for the purpose of increasing suction efficiency and reducing noise.

The orifice 22 is bent inwardly into the circumferential surface of the inlet port 21 to be close to the blower fan upper end 17. When the orifice 22 is provided inside the inlet port 21 as described above, the upper part of the blower fan Due to interference with (17) and the like, the deformation width of the shape is extremely limited, and a gap (t) between the fan 1 and the orifice 26 causes loss of intake air.

As described above, the loss of the intake air due to the gap (t) has caused a decrease in the blowing capacity, and caused the intake noise generated by the friction due to the air passing through the narrow gap at a high speed.

Therefore, in the present invention, the ribs are formed on the outer periphery of the upper frame of the blower fan to solve the above-mentioned problems, thereby minimizing the gap between the orifice and the fan while minimizing the gap between the upper end of the blower fan to increase the blowing efficiency. This is to achieve noise reduction.

1 is a perspective view of a blower fan for explaining the present invention,

2 is a cross-sectional view of a blower fan to which the prior art is applied,

3 is a cross-sectional view of the blower fan to which the present invention is applied,

4 is a perspective view showing an upper frame of the blower fan.

* Explanation of symbols for main parts of the drawings

31: Orifice 33: Blower Fan

34: upper frame 35: rib

r: round

Hereinafter, the configuration and operation of the present invention will be described with reference to the accompanying drawings.

3 is a cross-sectional view of the blower fan to which the present invention is applied, and FIG. 4 is a perspective view showing an upper frame of the blower fan.

The blower fan assembly is necessary for the intake of air and the forced air blowing of air.

The blower fan assembly 3 is equipped with a blower fan 33 at the lower end of the ball mouth 32 having the orifice 31 in the inlet 30 as shown in the second diagram.

The blower fan 33 is fixed as wrapped around the orifice 31. For this purpose, the rib 35 is integrally formed through pressing on the outer circumference of the upper frame 34 of the blower fan 33 as shown in FIG. Molding.

The rib 35 is pressed by applying a round r to the bent portion in order to reduce inflow and smooth inflow of intake air.

Looking at the working state of the present invention configured as described above; First, the blower fan assembly 3 includes the blower fan 33 using the upper frame 34 formed with the ribs 35, and the orifice 31 is provided at one side of the case to minimize the resistance of the suction port 30. Fix the provided bell mouse (32).

The orifice 31 formed on the bell mouse 32 is positioned in the rib 35 formed on the upper frame 34 of the blower fan 33, and the lower end surface 31 'and the upper rib surface of the orifice 31 are formed. The extension lines of (35 ') are fixed so as to coincide with each other to avoid interference and to eliminate the gap (t) that occurred up and down.

As described above, when the gap t between the orifice 31 and the fan 33 disappears, the width b of the blower fan 33 increases to increase the blowing capacity, and the amount of air lost to the gap t rapidly increases. Reduced noise due to friction is significantly reduced.

The blower fan for the automotive air conditioner of the present invention configured as described above is easy to change the shape of the fan and orifice as much as the gap is reduced, the air blowing capacity is increased, the amount of loss is reduced, the noise is reduced, and the riding comfort by quiet driving is guaranteed. It is a useful design to provide safe driving.

Claims (2)

In constructing a blower fan assembly for use in an automotive air conditioning apparatus; The blower fan assembly 3 is equipped with a bell mouse 32 having an orifice 31 inside the suction port 30 and a blower fan 33 at a lower end thereof. The blower fan 33 is a blower fan for an automotive air conditioner, characterized in that to form a rib on the outer periphery of the upper frame to be fixed as wrapped around the orifice (31). The method of claim 1; The rib 35 is a blower fan for an automobile air conditioner, characterized in that configured to give a round (r) to the bent portion to reduce the inflow resistance of the intake air.