KR102028605B1 - Intake duct with a blowing mode changing door and blower unit for a vehicle - Google Patents

Abstract

The present invention relates to an intake duct having a switching door, and according to one aspect of the present invention, includes a pair of opposing side walls and a periphery extending between the pair of side walls, wherein the periphery includes internal and external air. A duct body having an inlet formed therein and an auxiliary inlet formed on the pair of side walls; And a bracket including a seating portion arranged to cross each of the auxiliary inlets and having a fastening hole for fastening with the vehicle body, and a pair of support portions for supporting the seating portion to be spaced apart from the side wall. .

Description

INTAKE DUCT WITH A BLOWING MODE CHANGING DOOR AND BLOWER UNIT FOR A VEHICLE}

The present invention relates to an intake duct having a switching door, and more particularly, to an intake duct having a switching door for selectively introducing outside air or internal air into a room in an air conditioner of an automobile.

In general, the air conditioner for automobiles can be supplied to the indoor air by supplying the air to the room, or to block the outdoor air and recycle the indoor air according to the user's choice. To this end, the air conditioning case installed inside the vehicle is provided with an intake duct capable of selectively introducing outside air or bet. The intake duct is provided with an outside air inlet and an inside air inlet, respectively, and a switching door for blocking any one of the outside air inlet or the inside air inlet and opening the other is installed inside the intake duct.

An example of such an intake duct has been disclosed in Korean Patent Laid-Open Publication No. 10-2008-0092677 (name of the invention: a vehicle air conditioner), which is schematically illustrated in FIGS. 1 and 2. 1 and 2, the intake duct 10 includes an internal air inlet 11 and an external air inlet 12, respectively, and includes a blower unit 20 for sucking air outside the intake duct. It is fixed to the top of the case 22. On the other hand, the inside and outside air conversion door 30 is rotatably installed in the inside of the intake duct 10, so that any one of the inside air inlet or the outside air inlet can be opened and the other one can be closed.

The internal and external air conversion door 30 has a form in which a cylinder is cut in a quarter and is driven by a driving motor (not shown). 2 illustrates a state in which the internal / external air conversion door 30 closes the internal air inlet 11, and an auxiliary inlet 13 is additionally formed on the sidewall of the internal air inlet 11 to increase the suction amount of the internal air.

On the other hand, the intake duct 10 is fixed to the scroll case 22, in addition to the fixing portion (not shown) formed in the vehicle body using a bolt or screw and generally the sidewall of the bet inlet Brackets have been formed to be signed with the government. However, when the auxiliary inlet 13 is formed on the side wall as described above, there is a lack of space to install the bracket, there is a problem that the assembly work is difficult and it is difficult to obtain a sufficient fastening strength.

The present invention has been made in order to overcome the disadvantages of the prior art as described above, it is a technical problem to provide an intake duct that can be installed to the bracket in a desired position even when the auxiliary inlet is formed on the side of the intake duct.

According to one aspect of the present invention for achieving the above technical problem, and includes a pair of opposing side walls and a circumference extending between the pair of side walls, the circumference is formed inside and outside air inlet, A duct body having auxiliary inlets formed on the pair of side walls, respectively; And a bracket including a seating portion arranged to cross each of the auxiliary inlets and having a fastening hole for fastening with the vehicle body, and a pair of support portions for supporting the seating portion to be spaced apart from the side wall. .

Here, each of the pair of supports may be extended along the longitudinal direction of the circumference. In addition, the seating portion may be disposed parallel to the side wall.

In addition, at least one of the brackets may be formed with a cable fixing portion, the cable fixing portion may include a plurality of fixing ribs formed to protrude from the seating portion. Here, the plurality of fixing ribs may be arranged to have a rectangular shape, and the fixing groove may be formed between two adjacent fixing ribs.

In addition, when viewed in a direction perpendicular to the side wall, the seating portion divides the auxiliary inlet into a first region disposed adjacent to the inside air inlet and a second region disposed adjacent to the outside air inlet, and the first region. The area of may be set to be larger than the area of the second area.

According to another aspect of the invention, the intake duct is provided with the internal air inlet and the external air inlet; Internal and external air conversion doors for selectively opening any one of the internal air inlet and the external air inlet; And a scroll case coupled to a lower side of the intake duct and provided with a blower for introducing air through the inside or outside air inlets, wherein the intake duct is any one of the intake ducts as described above. A blower is provided.

According to one aspect of the present invention having the configuration as described above, because the bracket is provided to cross the auxiliary inlet, while ensuring a sufficient installation area, the bracket is disposed away from the surface of the auxiliary inlet, so that the amount of air flow into the auxiliary inlet The reduction can be minimized.

According to another aspect of the invention, since the support portion of the bracket extends along the longitudinal direction of the intake duct, it is possible to minimize the resistance to the flow of air flowing into the auxiliary inlet.

According to another aspect of the present invention, by forming a cable fixing portion in at least one of the brackets, it is possible to more easily fix the cable located adjacent to the intake duct, thereby minimizing the generation of noise.

1 is a cross-sectional view schematically showing the internal structure of a conventional general intake duct.
FIG. 2 is a perspective view illustrating the intake duct shown in FIG. 1.
3 is a perspective view showing a vehicle blower equipped with an embodiment of the intake duct according to the present invention.
4 is a side view showing one side of the embodiment shown in FIG.
FIG. 5 is an enlarged perspective view of a portion of the other side of the embodiment illustrated in FIG. 3.
FIG. 6 is a cross-sectional view taken along the line A-A 'of FIG. 4.
FIG. 7 is a cross-sectional view taken along the line BB ′ in FIG. 4.

Hereinafter, with reference to the accompanying drawings will be described in detail an embodiment of the intake duct according to the present invention.

Referring to FIG. 3, an embodiment 100 of an intake duct according to the present invention is illustrated, and the embodiment 100 is fixed to an upper portion of a scroll case 110 having a blower (not shown) therein. It is. The scroll case 110 serves to deliver the air discharged from the discharge port provided at the lower end of the intake duct into the air conditioner case (not shown), in the present invention may employ any type of scroll case known in the art. The detailed description thereof will be omitted.

The intake duct 100 has a pair of side walls 100a facing each other. The side wall 100a is formed to have a substantially fan shape, and a circumferential portion 100b is formed therebetween. In addition, the lower end of the circumference portion and the side wall forms an outlet opening communicating with the scroll case 110, and the upper end portion forms an external air inlet 102 and an internal air inlet 104, respectively. The bet inlet 104 is formed with a grill 106 extending in the form of a grid to block the introduction of bulky foreign matters.

In addition, the outside air inlet 102 is disposed to face the inside air inlet 104, and is disposed to the right upward based on FIG. 4.

On the other hand, the auxiliary inlet 108 is formed in the side wall (100a), respectively. The auxiliary inlet 108 is connected to the indoor air of the vehicle together with the internal air inlet 104 to be introduced into the intake duct, and to allow a larger amount of internal air to be introduced into the intake duct. The auxiliary inlet 108 is formed on each of the sidewalls, and based on FIG. 4, the auxiliary inlet 108 is disposed adjacent to the bettor inlet 104 from the center of the sidewall.

Inside and outside air conversion doors 120 are installed inside the intake duct 100. The internal and external air conversion door 120 is configured to selectively open any one of the outside air inlet and the inside air inlet and close the other according to its position. 3 and 4, the internal and external air conversion doors 120 are positioned to close the internal air inlet 104 and open the external air inlet 102. In FIG. As a result, the intake duct is operated in an outdoor air inflow mode. In this state, the auxiliary inlet 108 is also in a closed state by the internal and external air conversion doors 120.

The internal and external air conversion door 120 includes a rotation shaft 122 rotatably fastened to a boss portion (not shown) formed on the pair of side walls 100a. With respect to the rotation shaft 122, the internal and external air conversion door 120 is rotated by a cam and actuator not shown. When a switching operation is performed by a user in the interior of the vehicle, an operation signal is transmitted to the actuator, and the cam rotates accordingly, thereby rotating the internal / external air switching door 120 in any one of the betting circulation or the outside air inflow mode. The operation is made.

The intake duct 100 is fastened by using a screw or the like on the upper portion of the scroll case 110, but is also fastened to the vehicle body side. Therefore, a portion to be fastened with a vehicle body side and a screw is necessary, and for this purpose, a bracket 130 is formed to cross the auxiliary inlet 108.

The bracket 130 may be formed to connect any two points of the outer circumferential portion of the auxiliary inlet 108, and in FIG. 3, the auxiliary inlet is formed between an arc portion of the auxiliary inlet 108 and a straight portion at a lower end thereof. It extends across. Specifically, the bracket 130 extends between the support part 132 and the support part 132 extending along a direction substantially perpendicular from the surface of the side wall 100a and a seating part 134 which provides a fastening hole to be described later. It is formed to have).

In this case, the bracket 130 is formed integrally with the intake duct, but in some cases, may be considered to be coupled to the intake duct through a separate fastening means after being manufactured as a separate component.

The seating part 134 is fastened with a screw or the like in contact with a fastening part (not shown) provided in the vehicle body. To this end, a fastening hole 135 for fastening the screw is formed to penetrate the surface of the seating portion 134. Referring to FIG. 5, the surface of the seating portion 134 is disposed substantially parallel to the sidewall 100a, and is spaced apart from the sidewall 100a by the height of the support portion. Because of this, even if the bracket 130 is arranged to cross the secondary inlet 108, it may not significantly increase the resistance to the flow of air through the secondary inlet. In addition, the seating portion 134 may also serve to stabilize the flow of air flowing in, it is also useful for noise reduction.

Here, the seating portion does not necessarily need to be disposed parallel to the side wall, and an example in which the seating portion is inclined with respect to the side wall may be considered. For example, the seating part may be disposed to have a smaller distance from the side wall toward the right side with reference to FIG. 5. In this case, the seating portion may act as a guide to allow the air introduced into the auxiliary inlet to be introduced into the intake duct.

A bead 134a may be formed on the rear surface of the seating part 134 to increase the rigidity of the seating part. The bead 134a is formed to extend along the longitudinal direction of the seating portion 134. Here, it can be seen that the mounting portion is disposed relatively adjacent to the bet inlet 104 side. That is, the seating portion is disposed such that the distance S1 between the front end of the auxiliary inlet is smaller than the distance S2 between the rear end of the seating portion and the rear end of the auxiliary inlet.

The air flowing through the S1 may collide with the air flowing from the adjacent bet inlet 104 to increase the flow resistance of the air. Therefore, as described above, by arranging the seating portion relatively adjacent to the bet inlet side, it is possible to reduce the air flow resistance and maximize the amount of air flow in spite of the bracket installation. In addition, the bracket also serves to block the introduction of bulky foreign matter through the auxiliary inlet 108.

Referring to FIG. 6, as described above, the support part 132 extends in the longitudinal direction of the circumference part, that is, the direction substantially perpendicular to the side wall 100a, and the fastening hole 135 in the seating part 134. ) Is formed. The lower portion of the fastening hole 135, that is, the boss portion 135a is formed on the rear surface of the seating portion 134, so that a fastening member such as a screw can be stably supported.

Here, the support portion does not necessarily need to be disposed in a direction perpendicular to the side wall, and in some cases, may be disposed in an inclined direction with respect to the side wall. For example, the support portion may be arranged such that the distance from each other becomes narrower as it moves away from the side wall. Through this, it is possible to reduce the length of the seating portion, thereby further improving the rigidity of the seating portion. In addition, when the area of the auxiliary inlet is sufficiently large, an example of not forming the support may be considered. In this case, since the seating portion is disposed on the same plane as the side wall, the manufacturing and maintenance of the intake duct can be more easily performed.

Meanwhile, as described above, the internal and external air switching doors are driven by an actuator, and power and control signals for controlling the driving of the actuator are transmitted by a cable connected to the actuator. In general, cables installed inside a vehicle are not only provided with a thick coating to avoid disconnection and to prevent noise due to collisions with neighboring components, but also be electrically connected through a connector or the like. Therefore, a cable fixing part is provided inside the vehicle for stably fixing the cable without moving while driving the vehicle. In this embodiment, the bracket may be utilized to provide the cable fixing part.

FIG. 7 illustrates an example in which the cable fixing part is provided in the bracket. Referring to FIG. 7, the cable fixing part includes first and second fixing ribs 136a and 136b on the mounting part 134 surface of the bracket 130. The cable fixing part 136 is formed. The first fixed rib 136a has a shape of a rectangular wall with one side open, and the second go rib 136b basically has the same shape as the first fixed rib, but has a second fixed rib. The distal end of is disposed to face the distal end of the first fixed rib. As a result, a groove 136c is formed between the two fixing ribs, and the groove functions as the fixing groove 136c to which the cable is fitted and fixed. In addition, the space formed by the first fixing rib and the second fixing rib is utilized as a space into which the connector for electrically fastening the cables is inserted and fixed.

The first and second fixing ribs may be integrally formed with the bracket as shown in FIG. 7, but in some cases, an example of manufacturing the first and second fixing ribs as a separate part may be considered.

In the above-described example, although one bracket is provided for one auxiliary inlet, an example in which a plurality of brackets are provided in one auxiliary inlet may be considered. In addition, it is also possible to consider an example of forming a plurality of vent holes through which air can pass through the mounting portion within the limit that the rigidity of the mounting portion provided in the bracket is maintained. The resulting vent serves to minimize the increase in air flow resistance due to the bracket formation.

In addition, in the above embodiment, the bracket extends along an approximately up and down direction of the intake duct, but in some cases, an example may be extended along the left and right directions. In addition, the support does not necessarily need to be two, and an example having three or more supports may be considered. In this case, the seating portion may also have a "I" shape as shown, or may have any shape such as "T", "Y" or "X".

Claims (10)

A duct body including an opposite pair of side walls and a circumferential portion extending between the pair of side walls, wherein the circumferential portion is formed with an inlet and an outside air inlet, and an auxiliary inlet is formed in the pair of side walls, respectively; And
And a bracket including a seating portion disposed to cross each of the auxiliary inlets, and a mounting portion having a fastening hole for fastening with the vehicle body, and a pair of support portions for supporting the seating portion from the side wall. The method of claim 1,
Each of the pair of supports extends along the longitudinal direction of the circumference. The method of claim 2,
And the seating portion is disposed parallel to the side wall. The method of claim 1,
An intake duct, characterized in that a bead extending in the longitudinal direction of the seating portion is formed on the surface facing the auxiliary inlet of the seating portion. The method of claim 1,
Intake duct, characterized in that the boss portion extending in the direction toward the auxiliary inlet is formed around the fastening hole. The method of claim 1,
Intake duct, characterized in that the cable fixing portion is formed on at least one of the brackets. The method of claim 6,
And the cable fixing part includes a plurality of fixing ribs protruding from the seating part in a direction opposite to the auxiliary inlet. The method of claim 7, wherein
The plurality of fixing ribs are arranged to have a rectangular shape, characterized in that the fixing groove is formed between two adjacent fixing ribs. The method of claim 1,
When viewed from the direction perpendicular to the side wall, the seating portion divides the auxiliary inlet into a first region disposed adjacent to the inside air inlet and a second region disposed adjacent to the outside air inlet, and an area of the first region. An intake duct, which is larger than the area of the second region. An intake duct having an internal air inlet and an external air inlet;
Internal and external air conversion doors for selectively opening any one of the internal air inlet and the external air inlet; And
And a scroll case coupled to a lower side of the intake duct and provided with a blower for introducing air through the inside or outside air inlets.
The intake duct is a vehicle blower according to any one of claims 1 to 9.

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