KR20040099907A - Inlet ring for vehicle blower unit - Google Patents

Abstract

PURPOSE: An inlet ring for a blower of a vehicle is provided to reduce noise from vortex by restricting counter flow of air between the blade and the inlet ring with the first stepped guide, and to increase the heat exchange efficiency by supplying inflow air to the heat exchanger without loss. CONSTITUTION: A scroll type blower case(10) is composed of an internal air inlet and an external air inlet and a blowing port, and divided into an inlet chamber and a blowing chamber(14) by an inlet ring(20) of a blower of a vehicle. First and second guide part(23,24) are formed in the lower part of the inlet ring to surround the upper part of a blade(41) of a blower fan(40) installed in the blower case. The first and second guide parts surround the upper inner and outer sides of the blades of the blower fan to restrict inflow of air between the blade and the inlet ring and to prevent counter flow of air from the blade into the blower fan.

Description

Inlet Ring for Automotive Blower {INLET RING FOR VEHICLE BLOWER UNIT}

The present invention relates to an inlet ring for an automobile blower, and more particularly, to an inlet ring for an automobile blower that can reduce noise during inflow of air and prevent loss of air volume.

In general, a vehicle air conditioner is a device that cools or heats a vehicle interior by introducing air inside and outside the vehicle and heats or cools the air to blow into the interior of the vehicle. Blower is essentially provided. In general, as a blower for an automotive air conditioner, a centrifugal blower which mainly blows the air inside and out of a vehicle through a heat exchanger for cooling and heating after introducing the inside and outside of the vehicle by the air flow in the centrifugal direction caused by the rotation of the cylindrical fan is mainly used. do.

Referring to the blower according to the prior art based on the accompanying drawings as follows.

As shown in FIG. 1, a blower for a vehicle according to the related art includes a scroll-shaped blower case 10 having upper / outer air inlets 11 and 12 formed at an upper portion thereof, and a blower (not shown) formed at a side thereof. Is installed in the transverse direction inside the blower case 10, the inlet ring 20 for dividing the inside into the inlet chamber 13 and the blower chamber 14, and the inside / inside of the blower case 10 Centrifugal blower fan having a plurality of blades 41 in the circumferential direction and installed in the interior / exterior air conversion door 30 and the blower case 10 to selectively open and close the outside air inlets (11, 12) 40 and a motor 50 for driving the blowing fan 40.

In the blower having the above configuration, the blower fan 40 is blown to the heat exchanger side by sucking the inside / outside of the vehicle and flowing in the centrifugal direction while rotating by the power of the motor 50.

In more detail, the air flows in the axial direction of the blower fan 40 through the bell mouse 21 by the rotational force of the blower fan 40 and is arranged in the circumferential direction of the blower fan 40 by centrifugal force. After passing through the air flow path between the blades 41, it is discharged to the heat exchanger side through the vent.

The inlet ring 20 is formed in an annular shape having a bell mouse 21 therein, and is installed in the blower case 10 in a lateral direction, thereby dividing the blower case 10 into an inflow chamber 13 and a blower chamber 14. Is guided to smoothly flow into the blowing chamber 14 from the inlet chamber 13, so that the air introduced into the blowing chamber 14 does not flow back to the inlet chamber (13).

Through this purpose, the inlet ring 20 has various shapes. For example, as shown in FIG. 2, when the upper end of the blade 41 is stepped to have a lower inner diameter side, the inlet ring 20 has a blade 41. It is formed in parallel with the blade 41 at a predetermined distance from the. At this time, the inner diameter side end of the inlet ring 20 is bent vertically and horizontally along the shape of the blade 31 is formed between the blade 41 and the inner circumference of the inlet ring 20 is formed in the opening opening toward the horizontal.

The inlet ring for a vehicle blower according to the prior art configured as described above has the following problems.

Since the inlet ring 20 is formed only for the smooth inflow and backflow of air, the space between the inlet ring 20 and the blade 41 is opened horizontally so that the inlet ring 20 is introduced into the blower chamber 14. A part can be easily introduced into the gap between the top of the blade 34 and the inlet ring 20, the noise caused by the vortex generated within this interval, the problem that the air volume is reduced due to air loss have.

The present invention has been invented to solve the above conventional problems, and to provide an inlet ring for a vehicle blower to reduce the noise during the inflow of air, while maintaining the air flow while preventing the inflow and backflow of air smoothly. There is a purpose.

1 is a cross-sectional view of a blower for a vehicle according to the prior art.

Figure 2 is an enlarged cross-sectional view of the inlet ring for a vehicle blower according to the prior art.

3 is a cross-sectional view of the inlet ring for a vehicle blower according to the present invention.

<Description of the symbols for the main parts of the drawings>

10 blower case, 13 inflow chamber

14: blower room, 20: inlet ring

21: Bell mouse, 22: horizontal portion

23, 24: guide portion, 40: blowing fan

41: blade,

The present invention is provided in order to achieve the object as described above, is installed in the case for the car blower, and partitions the inside of the case into the inlet chamber and the blowing chamber, suction by a centrifugal blowing fan provided with a plurality of blades in the circumferential direction In the inlet ring for a vehicle blower for guiding the inflow of air,

The inlet ring is characterized in that the inner diameter end portion is provided with a first guide portion extending downwards to surround the upper portion of the inner diameter side wall of the blades.

The inlet ring may further include a second guide part surrounding the upper portion of the outer diameter side wall of the blade to extend downward.

The upper end of the blade is stepped stepwise, the first guide portion of the inlet ring is formed stepped along the top of the blade is wrapped around the upper side wall of the blade is opened between the end and the blade toward the lower side Openings may be formed.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to this, the terms or words used in the present specification and claims are defined in the technical spirit of the present invention on the basis of the principle that the inventor can appropriately define the concept of the term in order to explain his invention in the best way. It should be interpreted as meanings and concepts that match. The same reference numerals as used in FIG. 1 indicate the same components.

As shown in FIG. 3, the inlet ring 20 for an automobile blower according to the present invention has an annular shape having a bell mouth 21 therein, and is installed in the transverse direction inside the case 10 for the automobile blower. The inside of the blower case 10 is divided into an upper inflow chamber 13 and a lower blower chamber 14, and a predetermined interval is provided on the blade 41 of the blower fan 40 installed inside the blower case 10. It may be formed so as to surround a portion inside / outside the top of the blades (41).

For example, the inlet ring 20 for an automobile blower according to the present invention includes a horizontal portion 22 disposed parallel to the upper end of the blade 41 at a predetermined interval with respect to the upper end of the blade 41, and the horizontal portion ( The first guide portion 23 extending downward to surround the upper portion of the inner wall of the blade 41 at the inner diameter side end of the blade 22 and the upper portion of the outer wall of the blade 41 at the bottom of the horizontal portion 22. It may be made to include a second guide portion 24 which is formed to extend downward to surround at a predetermined interval. The first and second guide parts 23 and 24 may be formed in an annular shape along the arrangement of the blades 41. In addition, as shown in FIG. 3, the blade 40 and the inlet ring 20 have a gap t between the upper end of the blade 40 and the horizontal portion 22 of the inlet ring 20, and the side surface of the blade 40 and the inlet ring. The gap t between the first guides 23 of 20 is arranged to maintain the same gap.

The shape of the inlet ring 20 for an automobile blower according to the present invention is not limited to that illustrated and described in the drawings, and may be freely deformed according to the shape of the blade.

That is, when the upper end of the blade 41 is stepped in a step shape, the first guide part 23 of the inlet ring 20 is bent in a step shape along the shape of the blade 41 and the lower end of the blade 41. It may be formed extending below the top of the blade 41 to surround the top portion of the inner wall of the. Therefore, the opening between the first guide portion 23 and the blade 41 of the inlet ring 20 is opened downward.

The operation of the vehicle blower according to the present invention configured as described above is as follows.

As the blowing fan 40 rotates by the power of the motor 50, air flows in the axial direction of the blowing fan 40 through the bell mouse 21 by this rotational force, and thus the circumference of the blowing fan 40 by centrifugal force. After passing through the air flow path between the blades 41 arranged in the direction, it is discharged to the heat exchanger side through the tuyeres.

The air in the inflow chamber is guided by the first guide 23 of the inlet ring 20 while being introduced by the rotational force of the blowing fan. At this time, since the first guide part 23 is formed along the shape of the blade 41 and surrounds the upper end of the blade 41, the air introduced into the blower chamber 14 has the upper end of the blade 41 and the inlet ring 20. It is discharged through the air flow path between the blades (41) without entering into the gap between.

The air discharged between the blades 41 flows toward the tuyeres without being flowed back into the blades by the second guide 24 outside the blades 41.

As described above, according to the inlet ring for a vehicle blower according to the present invention, the stepped first guide provided on the upper side of the blade formed stepped to prevent vortex of air flowing into the blowing chamber to prevent the air This can prevent backflow between and inlet ring. Thus, noise due to the vortex is not generated, and all the inflow air is supplied to the heat exchanger side without loss, thereby increasing the air volume, thereby increasing the heat exchange efficiency.

While the invention has been described and illustrated in connection with a preferred embodiment for illustrating the principles of the invention, the invention is not limited to the configuration and operation as such is shown and described. Rather, those skilled in the art will appreciate that many modifications and variations of the present invention are possible without departing from the spirit and scope of the appended claims. Accordingly, all such suitable changes and modifications and equivalents should be considered to be within the scope of the present invention.

Claims (3)

Installed in the case 10 for the vehicle blower, the inside of the case is partitioned into the inlet chamber 13 and the blower chamber 14, and the centrifugal blower fan 40 is provided with a plurality of blades 41 in the circumferential direction. In the inlet ring 20 for an automobile blower for guiding the inflow of air sucked by The inlet ring is an inlet ring for a vehicle blower, characterized in that the first guide portion (23) extending downwards to surround the upper portion of the inner diameter side wall of the blade at its inner diameter side end. 2. The inlet ring for an automobile blower according to claim 1, wherein the inlet ring further includes a second guide portion (24) extending downwardly surrounding the upper portion of the outer diameter side wall of the blade. According to claim 1 or claim 2, wherein the upper end of the blade is formed stepped stepped, the first guide portion of the inlet ring is formed stepped along the upper end of the blade surrounding the upper side wall of the blade end An inlet ring for an automobile blower, characterized in that an opening is formed between the blade and the blade toward the lower side.