KR20050104116A - Blower unit for air conditioning system of a car - Google Patents

Abstract

The present invention relates to a blower for an air conditioner for an automobile, and when the inside / outdoor air switching door contacts the contact walls formed on both inner walls of the air intake case, and blocks the inside inlet or the outside air inlet in the air inflow mode or the outside air inflow mode. The purpose of the present invention is to improve the sealing property by dispersing the contact force with the contact wall so as to be in close contact with the whole.

To this end, the present invention is the top of the scroll case 30, the blowing fan is installed therein, the internal air inlet 11, the outdoor air inlet 12, and dome type internal and external air switching to selectively open and close the air inlet and the outdoor air inlet A contact wall 14 is formed on both inner walls of the air intake case 10 having the door 23, and the contact wall is a rotary shaft 23f of the inside and outside air switching doors when contacted with the inside and outside air switching doors. It is characterized in that it is formed in a triangular structure to widen the contact interval A with the lower end portion close to the) and the interval B with the upper end portion.

Description

Blower Unit for Air Conditioning System of a Car}

The present invention relates to a blower for an automotive air conditioner, and more particularly, in the air inflow mode or the outdoor air inflow mode, while the internal and external air conversion doors are in contact with the contact walls formed on both inner walls of the air intake case, The present invention relates to a blower for an automotive air conditioner that increases the sealing effect as a whole by increasing the contact force with the contact wall from the lower end portion close to the door rotation shaft to the upper end side when blocking the outside air inlet.

In general, a vehicle air conditioner is a device that cools or heats the air through a heat exchanger by introducing indoor and outdoor air of a vehicle, and then cools or heats the vehicle interior by blowing the air into the interior of the vehicle. An air blower is essentially provided to blow air into the vehicle interior by introducing air from the outside.

1 is a cross-sectional view of a conventional blower for a vehicle air conditioner.

As illustrated in FIG. 1, a conventional air conditioner blower of an automobile includes an internal air inlet 21 connected to a flow path of internal air of a vehicle and an external air inlet 22 connected to a flow path of external air of the vehicle. Air having a dome type internal / external air conversion door 23 for selectively opening / closing the internal air inlet 21 and the external air inlet 22 while rotating between the internal air inlet 21 and the external air inlet 22. An intake case 20; A scroll case 30 installed below the air intake case 20 and having a blowing fan 31 therein; The electric motor 32 is installed to penetrate the bottom of the scroll case 30 to drive the blowing fan 31. Reference numeral '33' indicates a bell mouth type guide hole for communicating the inflow chamber 20a in the air intake case 20 with the blowing chamber 30a in the scroll case 30. , '40' represents an air filter for filtering impurities in the inflowing air.

As shown in FIG. 2, the dome-shaped internal and external air conversion doors 23 have circular arc-shaped outer circumferential walls 23c that connect the fan-shaped side walls 23a and 23b and the side walls 23a and 23b. And a space portion 23e opened to allow air to pass through between the joint portion 23d, the side walls 23a and 23b, and the outer circumferential wall 23c, and outside the joint portion 23d. It has a structure having a rotating shaft 23f formed in the longitudinal direction of the door. In addition, on both sides of the locking step 23g extending to the outer circumferential side of the internal / external air switching door 23, when the internal air inlet 21 or the external air inlet 22 is blocked, air leakage to the blocked passage side is prevented. Sealing members 23h are attached to each other,

The rotary shaft 23f rotates in association with an operation of a blow mode selection switch (not shown) of an air-conditioning controller installed on a crash pad located in front of a vehicle interior. That is, the rotation shaft 23f is coupled to side holes formed in lower portions of both sides of the air intake case 20, and at one end thereof, although not shown in the drawing, a link arm, a lever, and the like. The connecting means of the connection is connected, the drive means of the cable (Cable) or actuator (Actuator) for rotating the lever is connected to the lower end of the lever.

Here, the inner surface between the inside air inlet 21 and the outside air inlet 22, that is, both inner walls of the air intake case 20, selectively block the inside air inlet 21 and the outside air inlet 22. The sealing member 23h formed on the locking step 23g of the internal / external air switching door 23 and the contact wall 24 which are in surface contact are protruded in a direction facing each other.

According to this structure, when the driver operates the blowing mode selection switch to select the internal air inflow mode or the external air inflow mode, the internal and external air conversion doors 23 are rotated about the rotary shaft 23f by the driving means. Depending on the mode, the air inlet 21 or the air inlet 22 is opened. At this time, the air introduced through the inside air inlet 21 or the outside air inlet 22 flows into the blowing chamber 30a of the scroll case 30 through the bell mouth-shaped guide port 33, and then blows a fan ( The air is blown toward the air conditioning case (not shown) connected to the air blowing duct 34 of the scroll case 30 by the rotation of 31.

However, in the conventional air conditioner blower as described above, since the contact walls 24 formed on both inner walls of the air intake case 20 have a straight structure, in the air inflow mode or the outside air inflow mode, When the inside and outside air conversion door 23 rotates about the rotation shaft 23f to block the inside air inlet 21 or the outside air inlet 22, the entire surface of the sealing member 23h of the inside and outside air conversion door 23 is closed. By not contacting the contact wall 24 at the same time, the sealing is not made uniform. That is, when the internal and external air conversion door 23 is rotated toward the internal air inlet 21 or the external air inlet 22, a part of the sealing member 23h of the internal and external air conversion door 23, that is, the door rotation shaft 23f. The lower surface (L) close to) first contacts the lower end of the straight contact wall (24), so that excessive pressure is applied to the lower surface (L).

As a result, the force of contact with the contact wall becomes weaker from the lower surface L of the sealing member 23h toward the upper surface U, so that the sealing member 23h of the internal / external air switching door 23 is Uniform surface contact between the contact walls 24 is not made.

In particular, an excessive pressure is applied to the lower surface L of the sealing member 23h to cause over sealing, thereby overloading the door rotation shaft 23f. Accordingly, a gap is generated while the repulsive force is generated at the upper end of the internal / external air conversion door 23 having a relatively small sealing effect. As a result, there is a problem in that the air leakage through the gap is reduced, as well as the sealing resistance is increased, the ventilation resistance is increased, the noise is increased, and also the air blowing efficiency is lowered to reduce the air conditioning performance.

Accordingly, the present invention has been made to solve the problems of the prior art, in the air inflow mode or the outdoor air inflow mode, while the internal and external air conversion door is in contact with the contact walls formed on both inner walls of the air intake case, the air inlet or the outside air When blocking the inlet, by increasing the contact force with the contact wall from the lower end to the upper end side close to the door rotation shaft, to provide a ventilation device for the automotive air conditioning apparatus to increase the sealing effect and increase the blowing efficiency as a whole. Its purpose is.

In order to achieve the above object, the present invention, in the top and the outside of the dome type to selectively open and close the air inlet and the outside air inlet while rotating around the inside inlet, outside air inlet, and the rotary shaft on the top of the scroll case provided with a blowing fan An air intake case having an air switching door is provided, and the inner wall of the air intake case has a structure in which the contact walls contacting the internal and external air switching doors protrude in a direction facing each other in the air inflow mode or the air inflow mode. In the air conditioner of the automobile air conditioner,

The contact wall is formed in a triangular structure when the contact with the internal and external air conversion door, the contact interval A with the lower end close to the rotation axis of the internal and external air conversion door is widened and the contact interval B with the upper end is narrowed. do.

In addition, the present invention is the air blower for the air conditioner of the automobile, characterized in that the contact interval B is 0.5 to 0.7 times the contact interval A.

The present invention is also characterized in that, in the air conditioner blower of the vehicle, the internal and external air switching doors are contacted with the contact wall by a sealing member attached to both ends of the edge.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail.

Figure 4 shows a cross-sectional view of the blower for a vehicle air conditioner according to the present invention.

As shown in FIG. 4, the air conditioner blower of the vehicle according to the present invention, similar to the structure of the conventional blower, the air inlet 11 and the outside air inlet 12 for introducing the indoor and outdoor air in the car An air intake case 10 having an internal and external air conversion door 23 that rotates to selectively open and close the internal air inlet 11 and the external air inlet 12, and a lower portion of the air intake case 10. Since it is composed of a combined scroll case 10 or the like, hereinafter, the same reference numerals are given to the same components as the conventional components, and detailed description thereof will be omitted.

The internal and external air conversion door 23 has a dome-shaped structure, as in the prior art, and a sealing member 23h is attached to both surfaces of the locking jaw 23g extending to the outer circumferential side thereof, and an air intake case 10 is disposed below the internal and external air conversion door 23. The rotating shaft 23f is coupled to the side holes formed in both side walls of the door and guides the rotation of the door by the driving force of the cable or the actuator. (See Fig. 3).

On both inner walls of the air intake case 10, as shown in FIGS. 4 and 5, the internal and external air conversion doors 23 which block any one of the internal air inlet 11 or the external air inlet 12 are provided. The contact wall 14 for surface contact with the sealing member 23h formed on both sides of the locking step 23g is formed.

The contact wall 14 is configured to rotate the shaft of the internal / external air conversion door 23 so as to increase the sealing property by uniformly distributing the contact force during surface contact with the sealing member 23h of the internal / external air conversion door 23. It is formed into an inverted triangle structure inclined at a predetermined angle in the direction of 23f).

As a result, the internal and external air conversion door 23 is rotated about the rotary shaft 23f to block the internal air inlet 11 or the external air inlet 12 so as to contact the contact wall from the lower end of the door toward the upper end. The degree will vary.

That is, when the driver selects the external air inflow mode by operating the blower mode selection switch of the air conditioning controller installed on the crash pad of the vehicle interior, the internal / external air conversion door 23 is driven by the drive of the cable or actuator. Rotating around the inside inlet 11, as shown in FIG. 4, the inside inlet 11 is closed.

In this state, the sealing member 23h of the internal / external air switching door 23 is in contact with the contact walls 14 formed on both inner walls of the air intake case 10 to maintain the airtight state. At this time, the contact wall 14 has an inverted triangular structure in which the width is widened from the lower end to the upper end with respect to the rotational axis 23f of the internal / external air conversion door 23, so that the internal and external air conversion door ( At the first contact between the sealing member 23h of the 23 and the contact wall 14, the lower end portion of the sealing member 23h, that is, the end side close to the rotation shaft 23f does not first contact the free end of the door. As the contact force increases. Accordingly, the internal and external air conversion doors 23 are not likely to overload the rotating shaft 23f as in the related art, and the sealing effect is increased by dispersing uniform contact force over the entire surface of the contact wall 14. do.

Fig. 5 is a sectional view of principal parts of the air intake case structure according to the present invention, (a) shows an external air inflow mode state, and (b) shows an internal air inflow mode state.

In FIG. 5, in order to facilitate understanding of the present invention, the sealing member 23h is omitted in the internal / external air switching door 23.

First, referring to FIG. 5 (a), as described above, when the internal / external air switching door 23 and the contact wall 14 are in contact with each other in the external air inflow mode, When the distance between the lower end portion close to the rotating shaft 23f and the lower end portion of the contact wall 14 is 'A', the distance B between the upper end portion of the internal / external air conversion door 23 and the upper end portion of the contact wall 14 is 0.5 to 0.7 times A, that is, B = (0.5 to 0.7) A. In other words, in the present invention, the contact wall is formed in an inverted triangular structure inclined at a predetermined angle so that the gap A of the lower end portion between the door 23 and the contact wall 14 is kept wider than the gap B at the upper end portion. The contact area is different. Therefore, when the sealing member 23h is attached to the internal / external air switching door 23, the sealing member 23h is brought into surface contact with the contact wall 14 by the intervals A and B. As a result, the sealing member 23h increases the contact force with the contact wall 14 as it goes from the bottom surface to the top surface side, whereby a gap does not occur in the top surface side as before, thereby obtaining a stable sealing effect. There is a number.

This action is equally applied to the inflow mode shown in Fig. 5 (b).

As described above, according to the present invention, by forming the contact wall of the inverted triangular structure inclined at a predetermined angle on both inner walls of the air intake case, the internal and external air circulation door and the contact wall to block the inside air inlet or the outside air inlet As the contact force increases toward the upper side of the door during contact, the sealing effect at the upper end of the door can be increased, thereby preventing air leakage from the upper end of the door and maximizing the blowing efficiency for air conditioning in the cabin. have.

Although the present invention has been described with respect to the preferred embodiment, the present invention is not limited thereto, and various modifications and applications will be possible to those skilled in the art without departing from the gist of the present invention.

1 is a perspective view of a blower for a vehicle air conditioner according to a conventional example.

2 is a cross-sectional view of a blower for a vehicle air conditioner according to a conventional example.

Figure 3 is a perspective view of the internal and external air conversion door in Figure 1;

4 is a cross-sectional view of a blower for a vehicle air conditioner according to the present invention.

Fig. 5 is a sectional view showing main parts of the air intake case in Fig. 4, (a) is a view showing an internal air inflow mode, and (b) is a view showing an external air inflow mode.

** Description of the symbols for the main parts of the drawings **

10, 20 ... Air Intake Case

11, 21 ... bet inlet

12, 22 ... open air inlet

14, 24 ... contact wall

23 ... indoor / outdoor switching door

23g ... hanging jaw

23h ... sealing member

23f ... axis of rotation

30 ... Scroll Case

Claims (3)

In the upper portion of the scroll case (Scroll Case) 30, the blowing fan 31 is provided therein, while rotating around the inside air inlet 11, outside air inlet 12, and the rotating shaft 23f and the inside air inlet 11 An air intake case 10 having a dome type internal and external air conversion door 23 for selectively opening and closing the outdoor air inlet 12 is provided on both inner walls of the air intake case 10. In the air inflow mode or the outdoor air inflow mode, the air blower for a vehicle air conditioner having a structure in which the contact wall 14 in contact with the internal and external air conversion door 23 is formed to protrude in a direction facing each other, The contact wall 14, when in contact with the internal and external air conversion door 23, widens the contact interval A with the lower end proximate the rotation shaft 23f of the internal and external air conversion door 23 and the contact interval with the upper end thereof. Blower for the automotive air conditioner, characterized in that formed in a triangular structure to narrow the B. The method of claim 1, The contact interval B is a blower for a vehicle air conditioner, characterized in that 0.5 to 0.7 times the contact interval A. The method of claim 1, The air blowing device for the vehicle air conditioner is characterized in that the inner and outer air conversion door 23 is in contact with the contact wall (14) by a sealing member attached to both ends of the edge.