JP4382549B2 - Vehicle defroster device - Google Patents

Description

  The present invention relates to a vehicle defroster device that blows air-conditioning air on the inner surface of a windshield of a vehicle to remove fogging of the glass surface or release the freezing of the glass surface of a wiper wiping portion. The present invention relates to a vehicle defroster device provided with a dedicated defroster outlet for blowing air to an inner driving visibility region (eye point).

Conventional technology

  A defroster for clearing the fogging of the glass surface and releasing the freezing of the glass surface by blowing dehumidified warm air sent from the air conditioning unit toward the inner surface of the windshield inside the windshield of the vehicle The blower outlet is provided (for example, refer patent document 1, 2).

  FIG. 11 and FIG. 12 show examples of general defroster devices. In the figure, 101 is a windshield, 102 is an instrument panel, and the defroster outlet 111 is disposed at the front end of the instrument panel 102. The air sent through the defroster duct 121 is blown out from the defroster outlet 111 at the front end of the instrument panel 102 toward the lower end of the windshield 101.

  By the way, in the defroster device described above, the defroster outlet 111 only blows air toward the lower end portion of the windshield 101, so that the defrost gradually proceeds from the lower end, and the eye located above the lower defroster device. There was a problem that the defrost of the point (driver's forward view area) was delayed.

  Therefore, there is a defroster device in which a dedicated outlet for blowing air toward a position above the lower end by a predetermined height is added to ensure driving visibility.

  FIG. 13 shows an example. In this apparatus, in addition to the first defroster outlet 111 that blows air toward the lower end region of the inner surface of the windshield 101 of the vehicle, the second defroster that blows air toward the upper driving field of view. An air outlet 112 is added, a branch 124 is provided in the middle of the defroster duct 121, and air is supplied to both the defroster air outlets 111 and 112.

According to this defroster device, the eye point can be quickly defrosted by blowing air from the second defroster outlet 112.
JP 2000-318441 A JP 2000-233721 A

  By the way, in the conventional example shown in FIG. 13, since the branch 124 to the first defroster outlet 111 is provided in the vicinity of the second defroster outlet 112, the turbulence of the air flow generated at the branch 124 is the second. There is a problem that the directivity of the air blowing from the defroster outlet 112 to the eye point is impaired, and as a result, the defrosting property of the eye point is deteriorated. There is also a problem that the disturbance of the airflow at the branch 124 contributes to noise.

  In view of the above circumstances, an object of the present invention is to provide a vehicle defroster device that can blow out highly directional air to a driving view area on the inner surface of a windshield and contribute to reduction of air conditioning noise. And

The first aspect of the present invention is the first defroster outlet for blowing air toward the lower end region of the inner surface of the windshield of the vehicle, and the second defroster blower for blowing air toward the driving vision region above it. In a vehicle defroster device comprising an outlet, an upstream side is connected to the air conditioning unit, and a downstream end is connected to the second defroster passage connected to the second defroster outlet, toward the second defroster outlet A fan-shaped directing portion that directs the driving field of view while gradually expanding in the left-right direction, and a sub-defroster passage that is connected to the air conditioning unit on the upstream side and connected to the first defroster outlet on the downstream side, branched from the main defroster passage at a position upstream of the directional unit of the fan, arranged defroster passage of the main to the central, support on the left and right sides The defroster passage is arranged, and the downstream side of the sub-defroster passage is connected to a chamber portion that extends over substantially the entire width in the vehicle width direction and forms the upper surface of the instrument panel, and the first defroster outlet is connected to the chamber portion. And a communication portion that communicates with the sub defroster passage is provided downstream of the left and right sub defroster passages, and a throttle portion of the air passage is formed in the communication portion .

A second aspect of the present invention, a vehicle defroster device according to claim 1, wherein the throttle portion so as to protrude into the air passage from the first defroster outlet side to the second defroster outlet It is formed.

A third aspect of the present invention, a vehicle defroster device according to claim 1, wherein the throttle portion from, respectively, respectively in opposed state first defroster outlet side and the second defroster outlet side It is formed so as to protrude into the air passage.

  According to the first aspect of the present invention, the sub-defroster passage for sending air to the first defroster outlet is not branched by the fan-shaped directing portion of the main defroster passage, and the position before the directing portion (from the directing portion). Since the air is branched at the upstream position), the air at the stage of flowing into the fan-shaped directing portion is not disturbed, and the air flows smoothly and blows out toward the driving field of view on the inner surface of the windshield. Therefore, the directivity of the blown air to the eye point (driving field of view) is improved, and defrost is preferentially performed from the eye point. In addition, since the turbulent flow is less likely to occur in the air flow, the cause of noise is reduced.

Further , since the sub defroster passages are arranged on both the left and right sides of the main defroster passage, the balance of the air flow to the defroster outlets on the left and right sides can be improved. Moreover, since the increase in the longitudinal dimension of the duct that forms the defroster passage is suppressed, it is possible to make the duct compact in the longitudinal direction.

Furthermore, since the cold air entering through the windshield can be warmed by the heated air passing through the chamber portion to go to the first defroster outlet, the flow of the cold air toward the passenger's knees can be reduced, This can contribute to relieving the occupant's feeling of cold knees.

In addition, since the defroster passage is communicated by providing a communication portion on the downstream side of the branched sub defroster passage, the air pressure from the left and right sub defroster passages can be averaged. For this reason, the wind pressure from the 1st defroster blower outlet can be made constant.

Further, since the throttle portion formed in the communication path suppresses the turbulent air flow in the air path, noise can be reduced. At the same time, the wind pressure blown from the first defroster outlet can be made constant.

According to the invention of claim 2 and the invention of claim 3 , the throttle portion can be easily formed with respect to the air passage.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 is a side sectional view of an air conditioner including the defroster device according to the embodiment, FIG. 2 is a plan view showing a schematic configuration of the defroster device, and FIG. 3 is a sectional view taken along the line III-III in FIG.

  As shown in FIG. 1, the vehicle defroster device is directed to a first defroster outlet 21 that blows air toward the lower end region PL of the inner surface of the windshield 1, and a driving view region PH above the first defroster outlet 21. And a second defroster outlet 22 for blowing out air.

  As shown in FIG. 2, the first defroster air outlet 21 is arranged at the front end of the instrument panel 2 so as to be dispersed in the vehicle width direction, and the second defroster air outlet 22 is slightly more than that. It is arranged on the upper surface of the rear instrument panel 2. FIG. 4 is an enlarged cross-sectional view of the first defroster outlet 21 portion disposed at the front end of the instrument panel 2. As shown in this figure, the first defroster outlet 21 opens toward the inner surface of the lower end of the windshield 1.

  Each of the defroster outlets 21 and 22 is connected to the downstream end of the vent / diff duct 4 extending from the air conditioning unit 3 via the upper duct 24 and the lower duct 23. As shown in FIG. 1, a vent duct 14 is further connected to the vent / diff duct 4 of the air conditioning unit 3, and an upper vent outlet 11, a center vent outlet 15, a side vent outlet is connected to the tip of the vent duct 14. Air outlets such as the outlet 16 are provided. Further, doors such as a vent door 5, a differential door 6, and an upper vent door 7 are provided at necessary portions of the passage in the air conditioning unit 3 and the passage in the vent / diff duct 4.

  As shown in FIGS. 2 and 3, the defroster duct is configured by combining an upper duct 24 coupled to the instrument panel 2 side and a lower duct 23 coupled to the air conditioning unit 3 side.

  FIG. 5 is a perspective view showing a configuration of the lower duct 23, and FIG. 6 is a perspective view showing a configuration of the entire duct in which a vent duct is further connected to a defroster duct configured by combining the upper duct 24 and the lower duct 23.

  As shown in FIG. 5, the lower duct 23 constituting the defroster duct is provided with a main defroster passage 25 and a sub defroster passage 26. The main defroster passage 25 is provided in the center, and the sub defroster passages 26 are provided integrally on the left and right sides of the main defroster passage 25.

  As shown in FIG. 3, the main defroster passage 25 arranged in the center has an upstream end (lower end) opening communicating with a downstream end (upper end) opening of a vent / diff duct 4 extending from the air conditioning unit 3, and a downstream end ( The upper end opening is connected to a second defroster outlet 22 formed in the upper wall of the upper duct 24. The sub-defroster passages 26 arranged on both the left and right sides communicate with the downstream end (upper end) opening of the vent / diff duct 4 whose upstream end (lower end) opening extends from the air conditioning unit 3, and the downstream end (upper end) opening is the upper duct. 24 is connected to an opening formed in the lower wall of the wall 24, and communicates with the first defroster outlet 21 through a chamber portion 27 formed in the upper duct 24.

  Further, at the downstream portion of the main defroster passage 25, there is a fan-shaped directing portion 25H that is directed toward the driving field of view region PH (see FIG. 1) while gradually expanding in the left-right direction toward the second defroster outlet 22. The sub-defroster passage 26 is provided at a position upstream of the fan-shaped directing portion 25H and is branched from the main defroster passage 25.

  That is, the upstream end opening of the main defroster passage 25 and the upstream end opening of the sub defroster passage 26 are in parallel with each other and communicate with the internal passage of the vent / diff duct 4 so that the conditioned air flowing from the air conditioning unit The main defroster passage 25 and the sub defroster passage 26 flow smoothly.

  As shown in FIG. 6, the upper duct 24 is developed in a shape in which the wings are expanded to the left and right, and has a chamber portion 27 that extends over substantially the entire width in the vehicle width direction. The chamber portion 27 is defined between the upper surface wall and the lower surface wall of the upper duct 24, and the upper surface wall defining the chamber portion 27 constitutes the upper surface of the instrument panel 2 (see FIG. 1). Yes. A first defroster outlet 21 and a side defroster outlet 29 are formed in the chamber portion 27.

  Next, the operation will be described.

  In this defroster device, a sub-defroster passage 26 for sending air to the first defroster outlet 21 is provided with a passage (vent / vent) at a position upstream of the fan-shaped directing portion 25H of the main defroster passage 25. Since it is connected to the differential duct 4), the influence of the diversion to the sub defroster passage 26 does not reach the air at the stage of flowing into the fan-shaped directing portion 25H, and the flow is not disturbed.

  Accordingly, the air flowing into the main defroster passage 25 flows smoothly and is blown out from the second defroster outlet 22 toward the driving field of view PH on the inner surface of the windshield 1 with high directivity. Defrosting is performed efficiently. In addition, since the turbulent flow is less likely to occur in the air flow, the cause of noise is reduced.

  Further, since the sub defroster passages 26 are arranged on both the left and right sides of the main defroster passage 25, the balance of the air flow to the defroster outlets 29 on both the left and right sides can be improved. Moreover, since the increase in the longitudinal dimension of the lower duct 23 in which the defroster passages 25 and 26 are formed can be suppressed, it is possible to contribute to downsizing the longitudinal dimension of the duct.

  In addition, as shown in FIG. 7, the front upper surface of the instrument panel 2 is configured by the upper surface wall of the chamber portion 27 of the upper duct 24, so that the chamber portion 27 is moved toward the first defroster outlet 21. The cold air R that enters through the windshield 1 can be warmed by the heated air that passes. Therefore, it is possible to alleviate the flow of cold air toward the occupant's knees, thereby contributing to the elimination of the occupant's feeling of cold knees.

  8 and 9 show a perspective view and a plan view of another embodiment of the present invention. In this embodiment, the downstream side of the sub defroster passage 26 is connected.

  That is, the upstream side of the sub defroster passage 26 is branched on both the left and right sides of the main defroster passage 25, but the downstream side thereof is connected to a chamber portion 27 formed in the upper duct 24, so Are communicating. The chamber portion 27 extends along the vehicle width direction, and the inside of the chamber portion 27 has a hollow shape over the entire length. By connecting the downstream side of the left and right sub-defroster passages 26 to the chamber portion 27, The communication part 31 which connects the defroster channel | path 26 of this is formed.

  The communication portion 31 is formed at a substantially central portion in the length direction of the chamber portion 27. In the communication portion 31, air from the left and right sub-defroster passages 26 is mixed. By this mixing, the air pressure can be made uniform. Moreover, since the 1st defroster blower outlet 21 is arrange | positioned around the communication part 31, the air by which the air pressure was equalized can blow off from the 1st defroster blower outlet 21. FIG. For this reason, the wind pressure from the 1st defroster blower outlet 21 can be made constant.

  Further, in this embodiment, a throttle part 32 is formed in the communication part 31. That is, as shown in FIG. 8, a convex portion that protrudes toward the passenger compartment is formed at a substantially central portion in the length direction of the upper duct 24, and this convex portion is used as the throttle portion 32. Therefore, the throttle portion 32 is provided in the communication portion 31 at the substantially central portion of the chamber portion 27. Further, the throttle portion 32 formed of a convex portion is formed from the first defroster outlet 21 side toward the second defroster outlet 22 so that the air passage of the communication portion 31 is restricted. It is working.

  In such a structure, the air flowing into the chamber portion 27 from the left and right sub-defroster passages 26 is equalized in the communication portion 31, and in addition, the throttle portion 32 causes air disturbance in the communication portion 31. Suppress the flow. And the air pressure from the 1st defroster blower outlet 21 can be made constant by equalizing air pressure, and noise can be reduced by suppressing air turbulence. Further, since the narrowed portion 32 can be formed simultaneously with the molding of the upper duct 24, the formation thereof is easy.

  FIG. 10 shows another embodiment in which the communication part 31 and the throttle part are provided. In this embodiment, in addition to the narrowed portion 32 being formed from the first defroster outlet 21 side toward the second defroster outlet 22, the first defroster outlet 22 side is connected to the first defroster outlet 22 side. A throttle portion 33 is formed in the direction of the defroster outlet 21.

  These throttling portions 32 and 33 protrude into the communication portion 31 so as to face each other, and act to further narrow the air passage as compared with the embodiment of FIGS. 8 and 9. Therefore, in this embodiment, the turbulent air flow can be more effectively suppressed by the constricting portions 32 and 33 facing each other. As a result, it is possible to make the wind pressure from the first defroster outlet 21 constant and to reduce noise by suppressing air turbulence more reliably.

  In the above embodiment, the main defroster passage 25 and the sub defroster passage 26 are arranged side by side in the left-right direction of the vehicle. However, the main defroster passage 25 and the sub defroster passage 26 are arranged in the front-rear direction of the vehicle. They may be arranged side by side, and the arrangement of the defroster passages 25 and 26 is not particularly limited.

It is a sectional side view of an air-conditioner provided with the defroster device of an embodiment of the present invention. It is a top view which shows schematic structure of the defroster apparatus of embodiment of this invention. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 1. It is an expanded sectional view of the 1st defroster blower outlet 21 part in FIG. It is a perspective view which shows the structure of the lower duct 23 in FIG. It is an external appearance perspective view which shows the whole structure of the duct which comprises the defroster apparatus of embodiment of this invention. It is a principle block diagram used for description of an effect | action of the defroster apparatus of embodiment of this invention. It is a perspective view which shows the defroster apparatus of another embodiment of this invention. It is a top view of the defroster apparatus of FIG. It is a top view which shows the defroster apparatus of another embodiment. It is the schematic block diagram seen from the vehicle inner side of the conventional general vehicle defroster apparatus. It is principal part sectional drawing of the defroster apparatus of FIG. It is principal part sectional drawing of another conventional defroster apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Front glass 2 Instrument panel 3 Air conditioning unit 21 1st defroster blower outlet 22 2nd defroster blower outlet 25 Main defroster channel | path 25H Fan-shaped directing part 26 Sub defroster channel | path 27 Chamber part 31 Communication part 32, 33 Restriction part PL Lower end area PH Driving field of view (eye point)

Claims (3)

Blows air toward the first defroster outlet (21) that blows air toward the lower end region (PL) of the inner surface of the windshield (1) of the vehicle, and the driving field of view (PH) above it. A vehicle defroster device comprising: a second defroster outlet (22);
The upstream side is connected to the air conditioning unit (3) and the downstream end is connected to the downstream portion of the main defroster passage (25) connected to the second defroster outlet (22), and the second defroster outlet (22). A fan-shaped directing part (25H) that directs the driving field of view while gradually expanding in the left-right direction is provided, the upstream side is connected to the air conditioning unit (3), and the downstream side is the first defroster outlet (21) A sub-defroster passage (26) connected to the main defroster passage (25) at a position upstream of the fan-shaped directing portion (25H) ,
The main defroster passage (25) is arranged in the center, and sub defroster passages (26) are arranged on the left and right sides thereof,
The downstream side of the sub defroster passage (26) is connected to a chamber portion (27) that extends over substantially the entire width in the vehicle width direction and forms the upper surface of the instrument panel (2). 1 defroster outlet (21) is connected,
On the downstream side of the left and right sub-defroster passages (26), a communication portion (31) that communicates with the sub-defroster passages (26) is provided,
A defroster device for a vehicle, wherein a throttle part (32, 33) of an air passage is formed in the communication part (31) . The vehicle defroster device according to claim 1 ,
The throttle portion (32) is formed so as to protrude into the air passage from the first defroster outlet (21) side toward the second defroster outlet (22). Defroster device. The vehicle defroster device according to claim 1 ,
The throttle portion (33) is formed so as to project into the air passage from the first defroster outlet (21) side and the second defroster outlet (22) side in a state of being opposed to each other. A vehicle defroster device.

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