Vehicle defroster device

Abstract

To provide a vehicle defroster device which can efficiently blow out the air-conditioning air to a wide range of a front windshield glass.SOLUTION: A defroster device comprises: an air-conditioning unit; a defroster blowout port 11; and a connection duct 12. The defroster blowout port 11 is arranged in a center region in a vehicle width direction below and in front of the front windshield glass so as to extend in the vehicle width direction and blows out an air-conditioning air toward the front windshield glass from a vehicle interior side. The connection duct 12 connects the air-conditioning unit to the defroster blowout port 11. The connection duct 12 has a chamber 17 with a passage width in a direction orthogonal to the vehicle width direction being wider than a passage width of a downstream end region in a blowout direction of the air-conditioning air. The chamber 17 is formed in a swollen shape that swells out toward a downstream side in the blowout direction of the air-conditioning air as proceeding toward the center region from one end side and the other end side in the vehicle width direction.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a defroster device for a vehicle that removes water vapor and frost that has adhered to a front windshield glass. [Background technology]

[0002] BACKGROUND ART Vehicles are equipped with a defroster device that blows conditioned air from inside the vehicle toward the front windshield glass, thereby removing water vapor and frost that has adhered to the front windshield glass (see, for example, Patent Document 1).

[0003] The defroster device includes an air conditioning unit that delivers conditioned air, a defroster outlet located below the front portion of the windshield, and a connecting duct that connects the air conditioning unit to the defroster outlet. The defroster outlet is located in the vehicle's central region and extends longitudinally in the vehicle width direction. This allows the conditioned air blown out from the defroster outlet to be blown across a wide area of ​​the windshield in the vehicle width direction, thereby removing water vapor and frost that has accumulated over a wide area of ​​the windshield as uniformly as possible. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 11-129742 Summary of the Invention [Problem to be solved by the invention]

[0005] The above-described defroster device is designed to blow conditioned air over a wide area of ​​the windshield by expanding the defroster outlet outward in the vehicle width direction. However, if another device unit, such as a head-up display, is installed below the windshield in front of the front seats, the defroster outlet cannot be expanded sufficiently outward in the vehicle width direction. In this case, it becomes difficult for the conditioned air blown from the defroster outlet to reach the outer area of ​​the windshield in the vehicle width direction, and measures such as increasing the volume of conditioned air must be considered.

[0006] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a defroster device for a vehicle that can efficiently blow conditioned air over a wide area of ​​the front windshield glass. [Means for solving the problem]

[0007] In order to solve the above problems, the defroster device for a vehicle according to the present invention employs the following configuration. That is, the defroster device of the vehicle according to the present invention comprises an air conditioning unit (e.g., air conditioning unit 3 in the embodiments) that sends out conditioned air, a defroster outlet (e.g., defroster outlet 11 in the embodiments) that is arranged extending in the vehicle width direction in the central region in the vehicle width direction below the front part of the front windshield glass (e.g., front windshield glass 2 in the embodiments) and that blows conditioned air from inside the vehicle toward the front windshield glass, and a connecting duct (e.g., connecting duct 12 in the embodiments) that connects the air conditioning unit and the defroster outlet, wherein the connecting duct has a chamber (e.g., chamber 17 in the embodiments) whose passage width in a direction perpendicular to the vehicle width direction is wider than the passage width of the downstream end region in the blowing direction of the conditioned air, and the chamber is formed in a bulging shape that bulges from one end side and the other end side in the vehicle width direction toward the central region downstream in the blowing direction of the conditioned air.

[0008] With the above configuration, when conditioned air is introduced from the air conditioning unit into the connecting duct, the conditioned air first flows into the chamber, passes through the downstream end region of the connecting duct, and is then blown out from the defroster outlet toward the front windshield. Because the chamber is shaped to bulge downstream from both ends in the vehicle width direction toward the central region, the conditioned air is also blown outward in the vehicle width direction from the left and right inclined portions of the top of the chamber. This configuration utilizes the fluid characteristic of flowing from the high-pressure side to the low-pressure side, allowing conditioned air to be blown from the chamber toward a wide range in the vehicle width direction toward the defroster outlet.

[0009] The bulging shape of the chamber is preferably an arc shape.

[0010] In this case, since the chamber has an arcuate bulging shape, conditioned air can be made to flow smoothly over a wider range in the vehicle width direction of the defroster outlet.

[0011] The downstream region of the connecting duct connected to the defroster outlet may be configured by a gradually increasing passage (e.g., the gradually increasing passage 16 in the embodiment) whose passage width in the vehicle width direction gradually increases toward the defroster outlet, and the chamber may be arranged in the gradually increasing passage.

[0012] In this case, the chamber is arranged in a gradually increasing passage in which the passage width in the vehicle width direction gradually increases toward the defroster outlet, so that the conditioned air flowing from the chamber toward the downstream end of the connecting duct can be smoothly guided outward in the vehicle width direction along the gradually increasing passage.

[0013] The connecting duct may have a first passage portion (e.g., first passage portion 12a in the embodiment) extending upward from the air conditioning unit, a second passage portion (e.g., second passage portion 12b in the embodiment) connected to an upper end of the first passage portion and extending toward the front of the vehicle, and a third passage portion (e.g., third passage portion 12c in the embodiment) connecting a front end of the second passage portion and the defroster outlet, and the chamber may be provided in at least the second passage portion of the first passage portion and the second passage portion, and the third passage portion may extend vertically upward toward the defroster outlet.

[0014] In this case, the conditioned air is blown out vertically upward from the defroster outlet along the third passage. At this time, in the central region of the defroster outlet in the vehicle width direction, the conditioned air strikes the windshield glass at an intersecting angle close to a right angle, while in the outer regions of the defroster outlet in the vehicle width direction, the conditioned air strikes the windshield glass at a relatively small intersecting angle. As a result, more conditioned air flows at a faster flow rate in the outer regions in the vehicle width direction. Therefore, when this configuration is adopted, it is possible to more efficiently supply conditioned air to a wide area of ​​the windshield glass.

[0015] The chamber is preferably formed to protrude above the second passage portion.

[0016] In this case, the conditioned air flowing upward from the first passage can be retained under high pressure in the chamber above the second passage, which increases the pressure difference between the inside of the chamber and the downstream end region of the connecting duct, thereby increasing the flow velocity and volume of the conditioned air flowing from the chamber toward the outside of the defroster outlet in the vehicle width direction.

[0017] The defroster outlet and the connecting duct are positioned so that their vehicle width center (e.g., vehicle width center C2 in the embodiment) is offset toward the passenger seat relative to the vehicle width center (e.g., vehicle width center C1 in the embodiment), and another device unit (e.g., head-up display 5 in the embodiment) may be positioned in a front lower position of the front windshield glass in front of the driver's seat so as not to interfere with the defroster outlet and the connecting duct.

[0018] In this case, the defroster outlet and connecting duct are offset toward the passenger seat, allowing for ample space to install other equipment units below the front windshield in front of the driver's seat. Even in this case, a sufficient flow of conditioned air can be supplied to the outer area of ​​the windshield in the vehicle width direction.

[0019] It is desirable that the apex of the bulging shape of the chamber (e.g., apex t in the embodiment) be positioned offset toward the passenger seat with respect to the vehicle width center of the connecting duct (e.g., vehicle width center C2 in the embodiment).

[0020] In this case, the extension length of the inclined portion of the chamber on the driver's side from the apex can be easily set longer than the extension length of the inclined portion on the passenger side from the apex, so that even if the defroster outlet and connecting duct are offset toward the passenger side, a sufficient flow of conditioned air can be supplied to the side edge of the front windshield glass on the driver's side. [Effects of the Invention]

[0021] In the defroster device according to the present invention, the chamber of the connecting duct is formed in a bulging shape that bulges downstream in the direction in which conditioned air is blown from both ends in the vehicle width direction toward the central region, so that conditioned air can be efficiently blown out over a wide area in the vehicle width direction from the defroster outlet. Therefore, when the defroster device according to the present invention is used, conditioned air can be efficiently blown out over a wide area in the vehicle width direction of the front windshield glass, quickly removing moisture and frost from the front windshield glass. [Brief explanation of the drawings]

[0022] [Figure 1] FIG. 1 is a view of the front part of the interior of a vehicle according to an embodiment, viewed from above and behind. [Figure 2] FIG. 2 is a cross-sectional view taken along line II-II in FIG. [Figure 3] FIG. 3 is an enlarged front view of a part of FIG. [Figure 4] FIG. 4 is a perspective view of a part of the defroster device according to the embodiment. [Figure 5] FIG. 5 is a diagram showing the distribution of conditioned air on the front windshield glass when the defroster device of the embodiment is employed. DETAILED DESCRIPTION OF THE INVENTION

[0023] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following explanation, unless otherwise specified, the terms "front, back, top, bottom, left, and right" refer to the front, back, top, bottom, left, and right of the vehicle. Also, in the appropriate places on the drawings, there is an arrow UP pointing up the vehicle, an arrow FR pointing forward, and an arrow LH pointing to the left side of the vehicle.

[0024] FIG. 1 is a diagram showing the front part of the interior of a vehicle 1 according to an embodiment as seen from diagonally above and behind, and FIG. 2 is a cross-sectional view taken along line II-II in FIG. In Fig. 1, reference numeral 2 denotes a front windshield glass disposed in front of the front seats of the vehicle 1, reference numeral 3 denotes an air conditioning unit of the air conditioner, reference numeral 4 denotes an instrument panel disposed facing in front of the front seats, and reference numeral 5 denotes a head-up display that displays information by reflecting it on the interior surface of the front windshield glass 2. In this embodiment, the head-up display 5 constitutes another device unit.

[0025] The vehicle 1 of this embodiment is a so-called left-hand drive vehicle in which the driver's seat is located on the left side when viewed in the direction of travel of the vehicle. The front windshield glass 2 is inclined at a predetermined angle from the front to the upper side of an upper shelf wall 4a (see FIG. 2) of the instrument panel 4 toward the rear of the vehicle. The air conditioning unit 3 is located in approximately the center of the instrument panel 4 in the vehicle width direction. The head-up display 5 is located in front of the driver's seat at the front end position of the upper shelf wall 4a of the instrument panel 4 (directly below the front edge of the front windshield glass 2).

[0026] 3 is an enlarged front view of a part of FIG. 1 (a part where the defroster device 10 is arranged), and FIG. 4 is a perspective view of a part of the defroster device 10. As shown in FIG. The defroster device 10 of this embodiment constitutes part of an air conditioning system and includes an air conditioning unit 3 that delivers conditioned air, a defroster outlet 11 that blows the conditioned air delivered from the air conditioning unit 3 from inside the vehicle toward the front windshield 2, and a connecting duct 12 that connects the air conditioning unit 3 to the defroster outlet 11. The air conditioning unit 3 incorporates an indoor heat exchanger (evaporator and heater) and a blower 13, not shown. The air conditioning unit 3 also has a blowing mode switching door, not shown. When the blowing mode switching door of the air conditioning unit 3 is switched to the side communicating with the connecting duct 12, the defroster device 10 delivers the conditioned air blown from the blower 13 to the connecting duct 12. In this embodiment, the conditioned air refers to air whose humidity and temperature have been adjusted by the air conditioning unit 3.

[0027] The defroster outlet 11 is disposed in the vehicle width direction in front of the upper shelf wall 4a of the instrument panel 4. In other words, the defroster outlet 11 extends longitudinally in the vehicle width direction below the front portion of the front windshield glass 2. The center C2 of the defroster outlet 11 in the vehicle width direction is offset toward the passenger seat with respect to the center C1 of the vehicle in the vehicle width direction. In other words, the entire defroster outlet 11 is disposed offset toward the passenger seat. In addition, the connecting duct 12 connected to the defroster outlet 11 is also disposed offset toward the passenger seat with respect to the center C1 of the vehicle in the vehicle width direction. The center C2 of the connecting duct 12 in the vehicle width direction is offset toward the passenger seat with respect to the center C1 of the vehicle in the vehicle width direction. The head-up display 5 in front of the driver's seat is disposed in a position below the front windshield glass 2 so as not to interfere with the defroster outlet 11 and the connecting duct 12.

[0028] The defroster outlet 11 is formed in a resin outlet garnish 14 attached to the end of the connection duct 12 (the end of a third passage portion 12c, which will be described later). As shown in FIG. 4, the outlet garnish 14 is a long component extending along the vehicle width direction, and is formed so that the defroster outlet 11 penetrates it in the vertical direction. The defroster outlet 11 has a plurality of ribs 15 extending along the vehicle front-rear direction and arranged at approximately equal intervals in the vehicle width direction. Note that the ribs 15 are not shown in FIGS. 1 to 3.

[0029] The connection duct 12 has a first passage portion 12a extending upward from the air conditioning unit 3, a second passage portion 12b connected to the upper end of the first passage portion 12a and extending toward the front of the vehicle while being slightly inclined upward, and a third passage portion 12c extending vertically upward from the front end of the second passage portion 12b and connected to the defroster outlet 11 of the outlet garnish 14. The first passage portion 12a, the second passage portion 12b, and the third passage portion 12c are integrally formed from a resin material.

[0030] The passage width of the first passage portion 12a in the vehicle width direction is formed to be approximately the same as the passage width of the defroster air outlet 3a (FIG. 2) of the air conditioning unit 3 in the vehicle width direction. In contrast, the passage width of the portion extending from the second passage portion 12b to the third passage portion 12c in the vehicle width direction gradually increases in a fan-shaped manner from the base side of the second passage portion 12b connected to the first passage portion 12a toward the upper end side of the third passage portion 12c. In this embodiment, the portion extending from the second passage portion 12b to the third passage portion 12c (the downstream region continuing to the defroster outlet 11 of the connecting duct 12) is configured by an increasing passage 16 whose passage width in the vehicle width direction gradually increases toward the defroster outlet 11.

[0031] Of the first passage portion 12a and the second passage portion 12b, at least the second passage portion 12b is provided with a chamber 17 whose vertical passage width (passage width in a direction perpendicular to the vehicle width direction) is wider than the vertical passage width (passage width in a direction perpendicular to the vehicle width direction) of a downstream end region Ae in the blowing direction of conditioned air. In this embodiment, a part of the upper wall 12bu of the second passage portion 12b is raised upward to form the chamber 17. Therefore, in this embodiment, the chamber 17 is formed so that its vertical passage width is wider than the vertical passage width of the downstream region, and is disposed within the gradually increasing passage 16 described above.

[0032] The chamber 17 is formed in a bulging shape that bulges from one end and the other end in the vehicle width direction toward the central region downstream in the blowing direction of the conditioned air. In this embodiment, the chamber 17 is provided in the upper wall 12bu of the second passage portion 12b extending in the vehicle front-rear direction, so that the central region of the chamber 17 bulges forward in a top view. More specifically, the bulging shape of the chamber 17 toward the downstream side is an arc. An apex t of the bulging shape of the chamber 17 (the portion that bulges most toward the front of the vehicle) is positioned offset toward the passenger seat side with respect to the center C2 of the connection duct 12 in the vehicle width direction. Therefore, the extension length of the arc-shaped inclined portion 17d on the driver's seat side, which is sandwiched between the apex t of the chamber 17, is longer than the extension length of the arc-shaped inclined portion 17a on the passenger seat side.

[0033] The outer end of each of the inclined portions 17d, 17a of the chamber 17 in the vehicle width direction is connected to the base of the gradually increasing passage 16. Specifically, the outer end of each of the inclined portions 17d, 17a in the vehicle width direction is connected to the vicinity of the portion of the gradually increasing passage 16 where the passage width in the vehicle width direction is narrowest. Therefore, at the outer portion of each of the inclined portions 17d, 17a of the chamber 17 in the vehicle width direction, a portion of the downstream end region Ae of the gradually increasing passage 16 where the passage width in the up-down direction is narrow extends in a substantially fan shape (flaring toward the end).

[0034] Next, the operation of the defroster device 10 will be described. When conditioned air is introduced from the air conditioning unit 3 into the connecting duct 12, the conditioned air flows from the first passage portion 12a of the connecting duct 12 into the chamber 17 of the second passage portion 12b, and then flows out from the chamber 17 into the downstream end region Ae, which has a narrow vertical passage width, of the gradually increasing passage 16. The conditioned air that has flowed into the downstream end region Ae changes direction vertically upward in the third passage portion 12c, and is blown out from the defroster outlet 11 toward the interior surface of the front windshield glass 2. At this time, the chamber 17 is formed in a bulging shape that bulges downstream from one end and the other end in the vehicle width direction toward the central region, so that the conditioned air is blown out radially from the left and right inclined portions 17d, 17a of the top t of the chamber 17 toward the outside in the vehicle width direction.

[0035] 5 is a diagram showing the distribution of conditioned air on the front windshield glass 2 when the defroster device 10 is in operation. In FIG. 5, the density of dots increases in areas where the flow rate of conditioned air is greater. Conditioned air, which is a fluid, has the characteristic of flowing from the high-pressure side to the low-pressure side. Therefore, in the defroster device 10 of this embodiment, which has a chamber 17 in part of the connecting duct 12, a sufficient flow rate of conditioned air is blown out from the high-pressure portion of the chamber 17 toward the defroster outlet 11 over a wide area in the vehicle width direction, as shown in Figure 5.

[0036] <Effects of the embodiment> In the defroster device 10 of this embodiment, the chamber 17 of the connecting duct 12 is formed in a bulging shape that bulges downstream in the direction in which conditioned air is blown out from one end and the other end in the vehicle width direction toward the central region. Therefore, the conditioned air flows radially downstream from the bulging portion of the chamber 17, and the conditioned air can be efficiently blown out toward a wide range of the defroster outlet 11 in the vehicle width direction. Therefore, when the defroster device 10 of this embodiment is adopted, conditioned air can be efficiently blown out over a wide area of ​​the front windshield glass 2 in the vehicle width direction, thereby quickly removing moisture and frost from the front windshield glass 2.

[0037] In addition, in the defroster device 10 of this embodiment, the bulging shape facing the downstream side of the chamber 17 is arc-shaped, so that conditioned air can flow more smoothly over a wide range in the vehicle width direction of the defroster outlet 11. However, the bulging shape facing the downstream side of the chamber 17 does not necessarily have to be such that the left and right inclined portions 17d, 17a are curved in an arc shape, and the left and right inclined portions 17d, 17a may be linear or non-arc curved.

[0038] Furthermore, in the defroster device 10 of this embodiment, a gradually increasing passage 16 is provided in the downstream region of the connecting duct 12, the passage width in the vehicle width direction gradually increasing toward the defroster outlet 11, and the chamber 17 is disposed within the gradually increasing passage 16. Therefore, the conditioned air flowing from the chamber 17 toward the downstream end of the connecting duct 12 can be smoothly guided along the gradually increasing passage 16 to the outside in the vehicle width direction.

[0039] In the defroster device 10 of this embodiment, the connecting duct 12 includes a first passage portion 12a extending upward from the air conditioning unit 3, a second passage portion 12b connected to an upper end of the first passage portion 12a and extending toward the front of the vehicle, and a third passage portion 12c connecting a front end of the second passage portion 12b to the defroster outlet 11. The chamber 17 is provided in at least the second passage portion 12b of the first passage portion 12a and the second passage portion 12b, and the third passage portion 12c extends vertically upward toward the defroster outlet 11. Therefore, when conditioned air is blown out from the defroster outlet 11, the conditioned air impinges on the inner surface of the front windshield glass 2 at an intersecting angle close to a right angle in the central region of the defroster outlet 11 in the vehicle width direction, but at a relatively small intersecting angle in the outer regions in the vehicle width direction. At this time, in the outer region in the vehicle width direction where the conditioned air hits the inner surface of the front windshield glass 2 at a relatively small crossing angle, the conditioned air flows at a high flow rate and with a sufficient flow rate. Therefore, when this configuration is adopted, more conditioned air can be made to flow toward the outer region of the front windshield glass 2 in the vehicle width direction.

[0040] Furthermore, in the defroster device 10 of this embodiment, the chamber 17 is formed to protrude above the second passage portion 12b of the connecting duct 12. Therefore, the conditioned air flowing upward from the first passage portion 12a of the connecting duct 12 can be retained in a high-pressure state by the chamber 17 in the upper wall 12bu portion of the second passage portion 12b. Therefore, when this configuration is adopted, the pressure difference between the chamber 17 and the downstream end region Ae of the connecting duct 12 can be increased, and the flow rate and volume of the conditioned air flowing from the chamber 17 toward the outside of the defroster outlet 11 in the vehicle width direction can be increased.

[0041] Furthermore, the defroster device 10 of this embodiment is disposed so that the center C2 of the defroster outlet 11 and the connecting duct 12 in the vehicle width direction is offset toward the passenger seat with respect to the center C1 of the vehicle 1 in the vehicle width direction, and the head-up display 5 is disposed in a position below and in front of the front windshield 2 in front of the driver's seat so as not to interfere with the defroster outlet 11 and the connecting duct 12. In this case, because the defroster outlet 11 and the connecting duct 12 are disposed offset toward the passenger seat, the head-up display 5 can be installed comfortably in a position below and in front of the front windshield 2 in front of the driver's seat. In this case, a sufficient flow rate of conditioned air can be supplied to the outer region of the front windshield 2 in the vehicle width direction.

[0042] Furthermore, in the defroster device 10 of this embodiment, the apex t of the bulging shape of the chamber 17 is positioned offset toward the passenger seat with respect to the center C2 of the connecting duct 12 in the vehicle width direction, so that the extension length of the arc-shaped inclined portion 17d on the driver's seat side of the apex t of the chamber 17 can be easily set longer than the extension length of the arc-shaped inclined portion 17a on the passenger seat side of the apex t. Therefore, even if the defroster outlet 11 and the connecting duct 12 are positioned offset toward the passenger seat side, a sufficient flow rate of conditioned air can be supplied to the side edge of the front windshield glass 2 on the driver's seat side.

[0043] The present invention is not limited to the above-described embodiment, and various design modifications are possible without departing from the spirit of the present invention. For example, in the above embodiment, the vertical passage width of a portion of the connecting duct 12 is formed wider than the vertical passage width of the downstream end region Ae, and this portion is used as the chamber 17. However, when the chamber 17 is provided in the portion of the connecting duct 12 that extends in the vertical direction, the front-rear passage width of a portion of the connecting duct 12 may be formed wider than the front-rear and vertical passage widths of the downstream end region Ae, and this portion may be used as the chamber 17. Furthermore, in the above embodiment, the chamber 17 is formed only in the second passage portion 12b of the connection duct 12, but the chamber 17 may be formed so as to straddle the second passage portion 12b and the first passage portion 12a. In addition, in the above embodiment, the chamber 17 is formed so as to protrude upward on the upper wall 12bu of the second passage portion 12b of the connecting duct 12, but the chamber 17 can also be formed on the lower wall side of the second passage portion 12b. Furthermore, in the above embodiment, the head-up display 5 is given as an example of another device unit that is placed in a lower front position of the front windshield glass 2 in front of the driver's seat, but a device unit other than the head-up display 5 may also be placed in a lower front position of the front windshield glass 2 in front of the driver's seat. [Explanation of symbols]

[0044] 2...Front windshield glass 2 3...Air conditioning unit 5. Head-up display 10...Defroster device 11...Defroster outlet 12...Connecting duct 12a...First passage section 12b…Second passage section 12c...Third passage section 16...Gradually increasing passage 17...Chamber C1: Center of the vehicle width C2: Center of the defroster outlet and connecting duct in the vehicle width direction

Claims

1. an air conditioning unit that sends out conditioned air; a defroster outlet that is disposed in a vehicle width direction in a central region in the vehicle width direction below a front portion of a front windshield glass and that blows conditioned air from an interior side of the vehicle toward the front windshield glass; a connecting duct that connects the air conditioning unit and the defroster outlet, the connecting duct has a chamber whose passage width in a direction perpendicular to the vehicle width direction is wider than the passage width of a downstream end region in a blowing direction of the conditioned air, The defroster device for a vehicle is characterized in that the chamber is formed in a bulging shape that bulges from one end side and the other end side in the vehicle width direction toward a central region downstream in a blowing direction of conditioned air.

2. 2. The defroster device for a vehicle according to claim 1, wherein the bulging shape of the chamber is an arc shape.

3. 3. The vehicle defroster device according to claim 1, wherein the downstream region of the connecting duct connected to the defroster outlet is configured as a gradually increasing passage whose passage width in the vehicle width direction gradually increases toward the defroster outlet, and the chamber is arranged in the gradually increasing passage.

4. The connecting duct is a first passage portion extending upward from the air conditioning unit; a second passage portion connected to an upper end of the first passage portion and extending toward the front of the vehicle; a third passage portion connecting a front end portion of the second passage portion and the defroster outlet, the chamber is provided in at least the second passage portion of the first passage portion and the second passage portion, 4. The defroster device for a vehicle according to claim 1, wherein the third passage portion extends vertically upward toward the defroster outlet.

5. 5. The defroster device for a vehicle according to claim 4, wherein the chamber is formed to protrude above the second passage portion.

6. the defroster outlet and the connecting duct are arranged such that their centers in the vehicle width direction are offset toward the passenger seat side with respect to the center of the vehicle in the vehicle width direction, A defroster device for a vehicle as described in any one of claims 1 to 5, characterized in that another device unit is arranged at a front lower position of the front windshield glass in front of the driver's seat so as not to interfere with the defroster outlet and the connecting duct.

7. 7. The defroster device for a vehicle according to claim 6, wherein the top of the bulging shape of the chamber is disposed offset toward the passenger seat with respect to the center of the connecting duct in the vehicle width direction.

Images