KR101276224B1 - Blower for vehicles - Google Patents

Abstract

The present invention comprises an inlet duct consisting of a duct body and an inner / outer air inlet formed to protrude from one side of the duct body, and having a connection wall interconnecting the outlet of the inside air inlet and the outlet of the outside air inlet; A blower for a vehicle comprising an opening and closing means for opening and closing an inner and an outside air inlet, the opening and closing means having a rotating shaft spaced apart from the inner surface of the inlet duct side connecting wall located between the inside and the outside air inlets. A guide roller formed to vary a distance from an inner surface of the connection wall when rotating about the center; First and second rollers spaced apart from the inner surface adjacent to the inner and outer air inlets of the inlet duct by a predetermined distance; The ventilating portion is formed in the plate-shaped main body portion, and is rotatably driven by the guide roller and the first and second rollers, and includes an internal and external air switching door for opening and closing the internal and external air inlets of the inlet duct, and between the internal and external air inlets. One side of the internal and external air conversion door is located in the close contact or spaced to the inner surface of the connecting wall by the rotation of the guide roller,

In the internal / external mixed mode as well as internal / external mode, the sealing gap is prevented between the internal and external air inlets by the gap between the connecting wall interconnecting the outlet parts of the internal and external air inlets and the internal and external air conversion doors. It is possible to provide a vehicle blower.

Vehicle, blowing, betting, outside, conversion, door,

Description

Blower for vehicles

1 is a cross-sectional view showing a general vehicle air conditioner.

2 is an exploded perspective view showing the configuration of a vehicular blower according to the prior art;

FIG. 3 is a cross-sectional view illustrating a coupling cross-sectional view of the vehicle blower illustrated in FIG. 2 when the internal / external air switching door is in the bet mode. FIG.

FIG. 4 is a cross-sectional view illustrating a coupling cross-sectional view of the vehicle blower illustrated in FIG. 2 when the internal / external air switching door is in an external air mode. FIG.

FIG. 5 is a cross-sectional view illustrating a combined cross-sectional view of the vehicle blower illustrated in FIG. 2, in which the internal / external air switching door is in an internal / external air mixing mode in which internal and external air flows simultaneously.

Figure 6 is a preferred embodiment of the present invention, a cross-sectional view showing the internal configuration of the vehicle air conditioner in the guide roller state in which the guide roller is not in close contact with the connecting wall in the bet mode state.

Figure 7 is a cross-sectional view showing the internal configuration of the vehicle air conditioner in a state in which the guide roller is operated in Figure 6 in close contact with the internal and external air conversion door to the connecting wall.

8 is a cross-sectional view showing the internal configuration of a vehicle air conditioner in a state in which the guide roller is not in close contact with the connecting wall in the outside air mode of the present invention mode.

Figure 9 is a cross-sectional view showing the internal configuration of the vehicle air conditioner in a state in which the guide roller is operated in Figure 8 in close contact with the internal and external air conversion door to the connecting wall.

10 is a cross-sectional view showing the internal configuration of a vehicle air conditioner in a state in which the guide roller is not in close contact with the connecting wall in the internal and external air mixing mode of the present invention.

Figure 11 is a cross-sectional view showing the internal configuration of the vehicle air conditioner in a state in which the guide roller is operated in Figure 10 in close contact with the internal and external air conversion door to the connecting wall.

12 shows a portion of another embodiment of a connecting wall of the invention.

Figure 13 is a plan view showing when the internal and external air conversion door according to the present invention is a band shape that is not connected in a closed loop.

14 is a perspective view showing appearance of first and second rollers according to the present invention;

15 is an external perspective view showing a state in which the internal and external air conversion doors surround the guide roller and the first and second rollers according to the present invention;

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

120: scroll case

121: blower fan

130: inlet ring

131: Bellemouth

140: filter means

200: inlet duct

210: duct body

220: bet inlet

221: exit section

225: Bet side sealing wall

230: outside air inlet

231: exit section

235: outside air sealing wall

240: connecting wall

241: inner wall

242: entry surface

243: stop surface

300: opening and closing means

310: guide roller

320: first roller

321: transfer protrusion

330: second roller

331: transfer protrusion

340: indoor and outdoor air conversion door

341: main body

342: vent

345: feed hole

400: first driving means

500: second drive means

The present invention relates to a blower for a vehicle, and more particularly, in the internal and external air mixing mode as well as in the internal and external air modes, a gap between the internal and external air conversion doors and the connecting wall interconnecting the outlets of the internal and external air inlets. It relates to a vehicle blower for sealing to prevent mutual air communication between the internal and external air inlet.

In general, a vehicle air conditioner is a device that cools or heats a vehicle interior by injecting indoor / external air and heating or cooling the air to blow into the interior of the vehicle. As shown in FIG. And the outside air inlet 12 is formed at one side, and the internal and outdoor air conversion doors 13 are installed to selectively open and close the internal and outdoor air inlets 11 and 12, and the inlet and outdoor air inlet side of the air conditioning case 40 is provided. A blower device 30 including a blower fan 20 for forcibly blowing to the air, an inlet side 43 into which air blown from the blower device 30 is introduced, and an outlet side from which the air is discharged (44) is provided and consists of an air conditioning case (40) provided with an evaporator (41) and a heater core (42) at regular intervals therein.

FIG. 2 is an exploded perspective view showing the configuration of a vehicular blower according to the prior art, and FIG. 3 is a cross-sectional view illustrating a coupling cross-sectional view of the vehicular blower shown in FIG. 2 when the internal / external air switching door is in a bet mode. 4 is a cross-sectional view illustrating a coupling cross-sectional view of the vehicle blower illustrated in FIG. 2 when the internal / external air switching door is in an external air mode, and FIG. 5 is an appearance of the switching door of the vehicle blower illustrated in FIG. 2. Perspective view.

As shown in the drawing, the blower 100 according to the related art has an inlet duct 110 having an internal air inlet 111 and an external air inlet 112 formed at an upper side thereof, and rotatably inside the inlet duct 110. Air-conditioning case which is connected to the lower and lower air inlet duct 110, the internal and external air conversion door 115 to selectively open and close the internal and external air inlet (111, 112) installed into the inlet duct 110 (40; conventionally), it comprises a scroll case (120) provided with a blower fan (121) for forcibly blowing to the inlet side (formerly).

Such a conventional blower 100 is formed by extending the outlet 122 to one side of the scroll case 120 to be coupled to the inlet side 43 (conventional) of the air conditioning case 40 (conventional).

In addition, between the inlet duct 110 and the scroll case 120, the bell mouse (guiding internal and external air introduced through the internal and external air inlets 111 and 112) to the upper side of the blower fan 121 ( 131 is provided with an inlet ring 130 through which the inlet ring 130 is integrally formed on the upper side of the scroll case 120.

In addition, the internal / external air switching door 115 is a plate type having a substantially flat shape, the structure of which is connected to the rotating shaft 116 rotatably coupled to both inner sides of the inlet duct 110 and the rotating shaft 116. It is installed, but is spaced apart from a predetermined interval is composed of a plate 117 is formed in a flat plate shape centered on the rotating shaft 116.

In addition, the flange 119 of a rubber material serving as a sealing part at both ends of the plate 117 to improve the sealing property to prevent air leakage between the internal and external air conversion door 115 and the inlet duct 110 It is formed to protrude vertically.

Meanwhile, the air filter 140 may be selectively inserted between the inlet duct 110 and the inlet ring 130.

Referring to the operation of the prior art vehicle blower configured as described above is as follows.

First, in the betting mode, as shown in FIG. 3, the switching door 115 opens the inside inlet 111 and closes the outside air inlet 112, and at this time, the air inlet ( The bet introduced through 111 flows through the bell mouse 131 to the scroll case 120 and is forcedly blown into the air conditioning case 30 (conventional).

Meanwhile, in the external air mode, as shown in FIG. 4, the switching door 115 seals the internal air inlet 111 and opens the external air inlet 112. At this time, the external air inlet ( The outside air introduced through 112 flows through the bell mouse 131 to the scroll case 120 and is forcedly blown into the air conditioning case 30 (conventional).

By the way, according to the prior art vehicle blower, when operating the heater in cold weather in winter, there is a problem that a lot of power required to increase the heating performance is required. That is, in cold weather in winter, while maintaining the interior of the car in the heating state, so as not to cause frost on the window glass such as the front window is set to the outdoor mode as shown in FIG.

In this case, since only cold air outside the vehicle is introduced through the outside air inlet 112, a lot of power required to heat the interior of the vehicle is required, and as a result, the heating efficiency is deteriorated.

In order to solve this problem, as shown in FIG. 5, the warmed indoors and the cold outside air flow into the interior of the scroll case 120 at the same time to prevent frost on the window glass such as the front window, but a part of the warmed indoors. By continuing to circulate to switch the indoor / outdoor air conversion door 115 to the internal and external air mixing mode state to further improve the indoor heating performance.

However, as shown in FIG. 5, when the internal / external air switching door 115 is switched to the internal / external air mixing mode, the outlets 111a and 112a of the internal air inlet 111 and the outdoor air inlet 112 are respectively changed. A predetermined gap t exists between the lower surface of the connecting wall 110a and the outer surface of the plate 117 constituting the inner / outer air switching door 115.

As a result, some of the cold outside air introduced through the outside air inlet 112 is bypassed into the gap t to be introduced into the room, thereby degrading the indoor heating performance.

The present invention was created in order to solve the above problems, while the indoor warmed and cold outside air flows into the inlet duct at the same time to prevent frost on the window panes such as the front window while continuing to circulate a portion of the warmed indoors In the internal and external air inlet mode as well as the internal and external air mixing mode to improve the heating performance, the internal and external air inlet openings are connected to each other by the gap between the connection wall and the outdoor and outdoor air conversion doors interconnecting the outlets of the internal and external air inlets. By sealing to prevent air communication, the heating performance is not deteriorated in the internal and external air mixing mode, and in addition, in the internal or external air mode, an air blower for a vehicle is provided in which the internal air or external air is not lost. Its purpose is to.

The present invention for achieving the above object, consisting of a duct body, the inner and outer air inlet formed to protrude to each side of the duct body, respectively, which connects the outlet of the inlet and the outlet of the outside air inlet An inlet duct having a connecting wall; In the vehicle blower comprising an opening and closing means for opening and closing the inner and outer air inlet, the opening and closing means is provided with a rotating shaft spaced apart from the inner surface of the inlet duct-side connecting wall located between the inside and outside air inlet. And a guide roller configured to vary a distance from an inner surface of the connection wall when rotating about the rotation shaft; First and second rollers spaced apart from each other by an inner surface adjacent to the inner and outer air inlets of the inlet duct; The ventilating portion is formed in the plate-shaped main body portion, and is rotatably driven by the guide rollers and the first and second rollers, and includes an internal and external air conversion door for opening and closing the internal and external air inlets of the inlet duct. One side of the internal and external air conversion doors located between the inlets may be in close contact or spaced apart from the inner surface of the connecting wall by the rotation of the guide roller.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of a vehicle blower according to the present invention will be described in detail as follows.

Figure 6 is a preferred embodiment of the present invention, a cross-sectional view showing the internal configuration of the vehicle air conditioner in a state that the guide roller is not in close contact with the connecting wall in the betting mode state, Figure 7 is a guide roller in Figure 6 Is a cross-sectional view showing the internal configuration of the vehicle air conditioner in a state in which the internal and external air switching door is in close contact with the connecting wall, Figure 8 is a guide roller in the outside mode of the present invention is not in close contact with the internal and external air conversion door to the connecting wall 9 is a cross-sectional view showing the internal configuration of the vehicle air conditioner in the state, Figure 9 is a cross-sectional view showing the internal configuration of the vehicle air conditioner in a state in which the guide roller is operated in close contact with the connecting wall in Figure 8, Figure 10 Inner structure of the vehicle air conditioner in a state in which the guide roller is not in close contact with the connecting wall in the internal and external air mixing mode of the present invention 11 is a cross-sectional view showing the internal configuration of a vehicle air conditioner in a state in which the guide roller is operated in Figure 10 in close contact with the connection wall to the connection wall in Figure 10, Figure 12 is another view of the connection wall of the present invention FIG. 13 is a view showing a part of an embodiment, and FIG. 13 is a plan view showing when the inside and outside air conversion doors according to the present invention are in a band shape without being connected in a closed loop state, and FIG. 14 is the first and second rollers according to the present invention. Figure 15 is a perspective view showing the appearance, Figure 15 is an external perspective view showing a state in which the internal and external air conversion door surrounding the guide roller and the first and second rollers according to the present invention.

The present invention consists of a duct body 210 and the inner and outer air inlets 220 and 230 protruding to protrude on one side of the duct body 210, respectively, and the outlet portion 221 of the internal air inlet 220. An inlet duct 200 having a connection wall 240 interconnecting the outlet portion 231 of the outside air inlet 230; Note that it is applied to all vehicle blowers including the opening and closing means 300 for opening and closing the internal and external air inlets 220 and 230.

As an example of the vehicular blower applied to the present invention, the rest of the configuration except for the inlet duct 200 is almost the same as the prior art described with reference to Figures 2, 3, 4, 5, once again to explain In the present invention, the member number has been changed from the prior art.

In order to forcibly blow air, which is coupled to the lower part of the inlet duct 200, the air, which is mixed with the inside air and the outside air, to the inlet side (see reference numeral 43 in FIG. 1) of the air conditioning case (see reference numeral 40 in FIG. 1). The blower fan 121, which is operated by receiving the rotational force of the driving motor, includes a scroll case 120 installed therein to be rotatable.

Between the scroll case 120 and the inlet duct 200, the air introduced through the internal and external air inlets 220 and 230, for example, air mixed with internal / external air or internal / external air is blown the fan 121 An inlet ring 130 through which a bell mouse 131 is formed to guide the upper side of the bar is provided. The inlet ring 130 is a constituent member constituting the scroll case 120. It is formed integrally with.

And, between the inlet duct 200 and the inlet ring 130, a filter means 140 for filtering foreign matter such as dust in the air may be selectively installed from the outside.

The present invention is such that the opening and closing means in the configuration of the vehicle blower as described above is a completely different configuration than the conventional plate type.

The opening and closing means of the present invention is installed inside the inlet duct 200 corresponding to the upper portion of the filter means 140 in the above-described configuration of the vehicle blower. The guide roller 310 and the first and second rollers ( 320, 330, and the internal and external air conversion door 340.

The guide roller 310 has a rotating shaft 310A spaced apart from the inner surface 241 of the inlet duct 200 side connecting wall 240 located between the inside air inlet 220 and the outside air inlet 230. In addition, the rotation axis 310A is formed so that the interval between the inner surface 241 of the connection wall 240 is variable when rotating.

Such a configuration of the guide roller 310 may have the following embodiment.

First, the guide roller 310, which is the remaining portion except for the rotation shaft 310A, is cut in the vertical direction with respect to the axial direction so that the shape viewed in the axial direction has a non-circular cross section.

Here, as an example of the non-circular cross-section is formed in a substantially elliptical shape, the rotation axis 310A may be formed in a position eccentric from the center of the guide roller 310, the rotation axis 310A of the connection wall 240 It is not necessary to form the rotational axis 310A eccentrically according to the space | interval gap with the inner side surface 241. FIG.

Second, the guide roller 310 may be cut in a vertical direction with respect to the axial direction to form a circular cross section instead of a non-circular cross section as viewed in the axial direction. In this case, the rotation shaft 310A may be formed in the guide roller 310. When configured in a position eccentric from the center, the rotation of the guide roller 310 when the rotation around the axis of rotation (310A) is able to vary the interval with the inner surface 241 of the connecting wall (240).

Therefore, when the rotary shaft 310A is eccentrically formed, the guide roller 310 can be configured to variously change the cross-sectional shape viewed in the axial direction by cutting in the vertical direction with respect to the axial direction. Will be.

In addition, the internal and external air inlets 220 may be spaced apart between the connection wall 240 and the internal and external air conversion doors 340 interconnecting the outlet parts 221 and 231 of the internal air inlet 220 and the external air inlet 230. In order to prevent the mutual air communication between the (23) and the guide roller 310 of the present invention when rotating around the axis of rotation (310A) configured to vary the interval with the inner surface 241 of the connecting wall 240 By the end 311 of the guide roller 310, the inner side surface of the connecting wall 240, one side portion 340A of the internal and external air conversion door 340 located between the internal and external inlet 220 and the external air inlet 230. By making it adhere to 241, it can seal and the sealing performance will become very excellent.

Next, the first and second rollers 310 and 320 are installed to be spaced apart from the inner surface adjacent to the inside air inlet 220 and the outside air inlet 230 of the inlet duct 200, in more detail. The first and second rollers 320 and 330 are installed to be spaced apart from the guide roller 310, and adjacent to the outlet portions 221 and 231 of the internal and external air inlets 220 and 230, respectively. It is rotatably installed in the left and right inside the duct body 210 in the position.

More specifically, it is installed at the boundary between the duct body 210 and the internal and external air inlets 220 and 230.

Therefore, the guide roller 310 and the first and second rollers 320 and 330 are arranged to be substantially triangular in the duct body 210.

On the other hand, as shown in Figure 13, 14, 15, the internal and external air conversion door 340 is any one of the first and second rollers 320, 330 of the first driving means 400 In response to a driving force being driven to rotate, the guide roller 310 and the first and second rollers 320 and 330 are coupled to be installed so as to surround them so that they can be moved in position in contact with the outer surfaces of the respective inner and outer air. Conversion door 340 is between the connecting wall 240 and the guide roller 310, the boundary between the duct body 210 and the inlet inlet 220 and the first roller 320, the duct body 210 and the outside air inlet ( It is arranged to pass between the boundary between the 230 and the second roller 330.

Here, the inner and outer sides of the switching door 340 in the width direction of the inner side in the longitudinal direction of the feed hole 345 is formed in a predetermined interval, the both ends of the first and second rollers 320, 330 At least one transfer protrusion 321 and 331 are formed on the outer circumferential surface to be inserted and coupled to correspond to the transfer hole 345. Any one of the first and second rollers 320 and 330 may be formed. When the first driving means 400 is rotated, the transfer protrusions 321 and 331 act as a traction force to rotate the internal and external air conversion doors 340 in a state where the transfer protrusions 321 and 331 are inserted into the transfer holes 345, and then the next transfer is performed. The process of being inserted back into the ball 345 is repeated.

In this case, when the first roller 320 of the first and second rollers 320 and 330 receives the driving force of the first driving means 400, the first roller 320 is an internal / external air switching door. The second roller 330 and the guide roller 310 serve as a guide for transferring the internal and external air conversion doors, while acting as a driving shaft for transferring the 340.

Here, according to the thickness of the internal and external air conversion door 340 can be formed in a concave groove structure without being formed in the shape of the through hole like the transfer hole 345.

As the first driving means 400, for example, a motor is used, and among the motors, it is preferable to use a servo motor having precise control of the number of revolutions according to a control signal.

This internal and external air conversion door 340 is a plate-like plate member 341, such as a film (Film), made of a thin, flexible plate-like strip in a closed loop state, was tensioned by an external force The elastic material is restored to its original state after the external force is dissipated.

The internal and external air conversion door 340 is rotatably driven by the guide roller 310 and the first and second rollers 320 and 330 as the vent 342 is formed in the plate-shaped main body 341. It acts to open and close the inside and outside air inlets 220, 230 of the inlet duct 200, and more specifically, the plate member 341 constituting the inside and outside air conversion door 340 is in accordance with the position movement At least one of the internal and external air inlets 220 and 230 is formed through the vent 342 through which the inlet communicates with the duct body 210. In the present invention, the vent 342 is converted into the internal and external air. The door 340 has a single long hole structure formed over a predetermined section.

Finally, when any one of the inlet and outlet air inlets 220 and 230 is communicated with each other by the duct body 210 and the vent 342, the guide roller 310 is the second drive The driving force of the means 500 is rotated and driven so that the inner and outer air switching doors 340 are in close contact with the inner wall surface 241 of the connecting wall 240 by the end thereof.

The second driving means 500 uses a motor as in the above-described first driving means, or when the motor is not used, transmits the rotational driving force of the first driving means 400 through a separate power transmission means. The guide roller 310 can be rotated at an angle.

As the second driving means 500, for example, a motor is used, and among the motors, it is preferable to use a servo motor having precise control of the number of revolutions according to a control signal.

Here, a case in which any one of the inlet and outlet air inlets 220 and 230 are communicated by the duct body 210 and the vent 342 will be described in more detail as follows.

First, when the air inlet 220 and the duct body 210 are communicated with each other by the vent 342, it means a bet mode for introducing only indoor air.

In addition, when the outside air inlet 230 and the duct body 210 are communicated with each other by the vent 342, it means an outside air mode for introducing only cold air.

Lastly, when a portion of each of the air inlet 220 and the outdoor air inlet 230 and the duct body 210 communicate with each other by the vent 342, the inlet duct 200 simultaneously warms the indoor warm air and cold air. It means the internal and external air mixing mode in which a part of the indoor air and a part of the outdoor air are mixed and introduced to improve the indoor heating performance by continuously circulating a part of the warmed air in the room while preventing the occurrence of frost on the window glass such as the front window.

So far, the configuration of the opening and closing means 300 that is the main configuration of the present invention has been described.

Hereinafter, with reference to the accompanying drawings, the operation of the preferred embodiment of the present invention will be described separately by betting mode, the outside air mode and the mixed inside and outside air mode. Here, prior to the description of each mode of the present invention, the cross-section hatched in the internal and external air conversion door 340 shown in Figures 6 to 11 is the side of the closed portion that does not pass air, the cross-section is not hatched air is passed through Mean vent 342 to be.

<Betting mode>

6 illustrates a state in which the guide roller 310 does not closely contact the inner and outer air conversion doors 340 with the inner side surface 241 of the connection wall 240 in the bet mode.

In the state of FIG. 6 as described above, most of the air in the vehicle interior may pass through the air inlet 220, and then may be introduced into the duct body 210 through the air vent 342 of the internal / external air conversion door 340. Is in a state that can be leaked toward the outside air inlet 230 through the gap between the connecting wall 240 and the internal and external air conversion door 340.

In this state, as shown in FIG. 7, when the guide roller 310 is rotated about the rotation shaft 310A by driving the second driving means 500, the internal and external air switching doors 340 themselves. Since the elastic material is stretched and in close contact with the inner surface 241 of the connecting wall 240. In this case, there is no gap between the connecting wall 240 and the internal and external air conversion doors 340, and eventually, the internal and external air inlets 220 and 230 are prevented from intercommunicating with each other. Bet is to be able to enter into the duct body 210 without being lost.

<Outdoor mode>

On the other hand, if you want to switch to the outside air mode in the above-described bet mode state, first, by operating the second drive means 500 to position the position of the guide roller 310, that is, the internal and external air conversion door 340 ) To the position not in close contact.

Thereafter, the first driving means 400 for rotating any one of the first and second rollers 320 and 330 is operated for a predetermined time to rotate any one of the first and second rollers 320 and 330. When driven, the internal and external air conversion doors 340 are rotated by the guidance of the remaining roller and the guide roller 310, and the vent part 342 communicates between the air inlet 220 and the duct body 210. Come to.

At this time, the remaining internal and external air conversion door 340 except for the vent 342 is blocked from the inlet air inlet 220 is not in communication with the duct body 210. That is, as shown in FIG. 8, the guide roller 310 is not in close contact with the inner and outer surfaces 241 of the connection wall 240.

In the state of FIG. 8 as described above, after the air outside the vehicle passes through the outside air inlet 230, most of the air may flow into the duct body 210 through the air vent 342 of the internal / external air conversion door 340. Is a state that can be leaked to the inside air inlet 220 through a gap between the connecting wall 240 and the internal and external air conversion door 340.

In this state, as shown in FIG. 9, when the guide roller 310 is rotated by driving the second driving means 500, the internal and external air conversion doors 340 are stretched because they are elastic materials. It is in close contact with the inner surface 241 of the connecting wall 240. In this case, there is no gap between the connecting wall 240 and the internal and external air conversion doors 340, and eventually, the internal and external air inlets 220 and 230 are prevented from intercommunicating with each other. It is to be able to enter the duct body 210 without being lost outside air.

The reason for carrying out the above-described outdoor air mode is to prevent frost from occurring on window panes such as the front window while keeping the interior of the car heated in cold weather in winter.

<Internal and external mixing mode>

On the other hand, if only the outdoor air mode described above, rather the cold air outside the vehicle through the outside air inlet 230 is required a lot of power required to heat the interior of the vehicle, as a result, the heating efficiency is lowered.

In order to solve this problem, the indoor warming and cold outside air flow into the inlet duct 200 at the same time to prevent frost on the window glass such as the front window, while circulating the warming part of the indoor warming to improve the heating performance. The internal and external air mixing mode is carried out by mixing a part of the inside air and a part of the outside air.

In order to proceed with the mixing of the internal and external air, first, the second driving means 500 is operated in the above-described betting mode state (see FIG. 7) or in the outdoor mode state (see FIG. 9) to position the guide roller 310. 6 returns to the state shown in FIG. 6 or 8, that is, the position which does not contact the internal / external air conversion door 340 in close contact.

Thereafter, the first driving means 400 for rotating any one of the first and second rollers 320 and 330 is operated for a predetermined time to rotate any one of the first and second rollers 320 and 330. When driven, the internal and external air conversion doors 340 are rotated by the guidance of the remaining rollers and the guide rollers 310, and the ventilation unit 342 is a part of each of the internal and external air inlets 220 and 230 and the duct body 210. You are in a position to communicate with each other. In this case, as shown in FIG. 10, the guide roller 310 is not in close contact with the inner and outer air conversion doors 340 to the inner surface 241 of the connecting wall 240.

In the state of FIG. 10 as described above, part of the outside air introduced through the outside air inlet 230 and part of the outside air introduced through the inside air inlet 220 pass through the vent 342 of the inside and outside air conversion door 340. It can be introduced into the duct body 210, the remaining outdoor air introduced into the outdoor air inlet 230 is bypassed to the indoor air inlet 220 through the gap between the connecting wall 240 and the internal and external air conversion door 340, By flowing in, it becomes the state which can rather deteriorate indoor heating performance.

In this state, as shown in FIG. 11, when the guide roller 310 is rotated by driving the second driving means 500, the internal and external air conversion doors 340 are stretched because they are elastic materials. It is in close contact with the inner surface 241 of the connecting wall 240. In this case, there is no gap between the connecting wall 240 and the internal and external air conversion doors 340, and eventually, the internal and external air inlets 220 and 230 are prevented from intercommunicating with each other. Part of the outside air to be blocked can be bypassed to the inlet inlet 220, and furthermore it is possible to prevent the deterioration of the indoor heating performance because the outside air is not introduced into the room.

Meanwhile, in FIGS. 6 to 10, which are views for explaining a preferred embodiment of the present invention, the connection wall 240 is formed at the boundary between the duct body 210 and the internal and external air inlets 220 and 230. The inner side sealing wall 225 and the outer side sealing wall 235 are further formed separately from each other, and the first and second rollers 320 and 330 are formed on the inner side sealing wall 225 and the outer side. It is installed in a position to always be in contact with the outside air conversion door 340 to the sealing wall 235.

Here, at the boundary between the duct body 210 and the inner and outer air inlets 220 and 230, the inner side sealing wall 225 and the outer side sealing wall 235 are further separately spaced apart from the connecting wall 240. Although what was formed was mentioned as an example, the internal side sealing wall 225 and the external air side sealing wall 235 are not formed separately, but the end part of the connection wall 240 is rotated by the rotation of the guide roller 310. When the inside and outside air switching doors 340 are brought into close contact with the wall surface, the first and second parts are placed at a position such that the inside and outside air switching doors 340 are always in contact with the boundary between the duct body 210 and the inside air inlets 320 and 330. Of course, the two rollers 320 and 330 can be installed.

However, in the first and second rollers 320 and 330 of the present invention, the inner and outer air switching doors of the first and second rollers 320 and 330 are formed on the inner wall surface 241 of the connecting wall 240 by the rotation driving of the guide roller 310. When the 340 is in close contact with each other, the outside and outside air switching doors 340 contact the boundary between the duct body 210 and the inside inlet openings 220 and 230 or the sealing walls 225 and 235 protruding from the boundary. Can be installed at the location.

On the other hand, the position where the guide roller 310 which concerns on this invention adjoins from the inner wall surface 241 of the connection wall 240, when the guide roller 310 was rotated by a predetermined angle about the rotation axis 310A, If the end 311 is close enough to the inner wall surface 241 of the connecting wall 240, the internal and external air conversion door 340 is in close contact with the inner wall surface 241 of the connecting wall 240. 12, the entrance surface 242 and the entrance surface (240) entering the inner wall surface 241 of the connecting wall 240 during the rotational driving of the guide roller 310 as shown in FIG. A stop surface 243 extending from 242 to stop the rotational drive of the guide roller 310 may be configured.

In this way, the inner wall surface 241 of the connecting wall 240 is composed of the entry surface 242 and the stop surface 243 is the end 311 of the entry surface 242 during the rotational drive of the guide roller 310 This is to prevent the end of the guide roller 310 from deviating from the connecting wall 240 when the current applied to the motor, which is the second driving means 500, is overoperated for more than a set time in the state of entering.

In the present invention, the entry surface 242 to prevent the problem that the internal and external air switching door 340 is not in close contact with the inner wall surface 241 of the connecting wall 240 due to the operation error of the motor as the second driving means. The stop surface 243 is formed to extend so that the end 311 of the guide roller 310 is stopped in close contact with the inner surface 241 of the connecting wall 240. will be.

In this case, the inner surface 241 of the connection wall 240 is preferably formed such that the entrance surface 242 and the stop surface 243 are concave round.

As described above, according to the air blower for a vehicle according to the present invention, the warmed indoors and the cold outside air are introduced into the inlet duct at the same time, so that frost does not occur on the window glass such as the front window, and continues to circulate some of the warmed indoors. In the inside and outside air mixing mode as well as the inside and outside air mixing mode, which improves indoor heating performance, the gap between the inside and outside air inlets is separated by a gap between the connecting wall interconnecting the outlet portions of the inside and outside air inlets and the inside and outside air conversion doors. By sealing to prevent mutual air communication, the heating performance is not deteriorated in the internal and external air mixing mode, and additionally, the internal or external air flowing in the internal or external air mode is not lost.

In addition, the present invention provides a very simple configuration of a sealing structure to prevent mutual air communication between the inlet and the outside air inlet by the separation gap between the connection wall and the outside air switching door interconnecting the outlet portions of the inside and outside air inlet. In addition, there is an advantage that the sealing performance is very excellent.

Claims (4)

Consists of a duct body 210 and the internal and external air inlets 220 and 230 protruding from one side of the duct body 210, respectively, the outlet 221 and the outside air inlet of the internal air inlet 220 An inlet duct 200 having a connecting wall 240 interconnecting the outlet portions 231 of 230; In the vehicle blower comprising an opening and closing means 300 for opening and closing the internal and external air inlets 220, 230, The opening and closing means 300, The rotary shaft 310A is provided to be spaced apart from the inner surface 241 of the inlet duct 200 side connecting wall 240 located between the internal air inlet 220 and the external air inlet 230, and the rotary shaft 310A. A guide roller 310 formed to vary a distance from an inner surface 241 of the connection wall 240 when rotating about the center; First and second rollers 320 and 330 spaced apart from the inner surfaces adjacent to the inside air inlet 220 and the outside air inlet 230 of the inlet duct 200 by a predetermined interval; Ventilation part 342 is formed in the plate-shaped main body part 341 and is rotated and driven by the guide rollers 310 and the first and second rollers 320 and 330, thereby allowing the inside and outside of the inlet duct 200. Including the outdoor and outdoor air conversion door 340 to open and close the air inlet 220, 230, One side portion 340A of the internal / external air conversion door 340 located between the internal air inlet 220 and the external air inlet 230 is formed on the inner surface of the connection wall 240 by the rotation of the guide roller 210. Vehicle blowing device, characterized in that the contact or spaced 241. The method of claim 1, An inner wall surface 241 of the connection wall 240 is an entrance surface 242 which enters when the guide roller 310 is driven to rotate, and extends from the entrance surface 242 to drive the rotation of the guide roller 310. A vehicle blower comprising a stop surface (243) for stopping the. The vehicle blower of claim 2, wherein the access surface (242) and the stop surface (243) are concavely rounded on the connection wall (240). The method of claim 1, The guide roller 310, the internal and external air conversion door 340 in the internal air mode to open the internal air inlet 220, the external air mode to open the external air inlet 230, the internal air inlet 220 and the external air inlet ( 230. After the completion of the movement to any one mode of the internal and external air mixing mode of opening each part to mix the internal and external air, the internal and external air conversion door 340 is the inner surface of the connection wall 240 of the inlet duct 200 Vehicle blower, characterized in that rotationally driven to be in close contact with (241).

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