JP2006096165A - Rear glass defogging device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To preclude bedewing on the inner surface of a rear glass 1. <P>SOLUTION: A rear glass defogging device for a vehicle is equipped with a plurality of blowout holes 31 to blow out the air toward the upper part of the inner surface of the vehicle rear glass 1, a suction hole 40 provided below the rear glass 1 for sucking in the surrounding air, a heat exchanger 13 for cabin heating to heat the sucked-in air, and a blower 12 to blow out of the holes 31 the hot wind heated by the heat exchanger 13 for cabin heating, and generates an air stream of hot wind flowing along the inner surface of the rear glass 1 toward the suction hole 40. Because the hot wind heated by the heat exchanger 13 for cabin heating flows along the inner surface of the rear glass 1, the inner surface of the rear glass 1 is heated. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vehicular rear glass antifogging device that prevents fogging of a rear glass of a vehicle.

Conventionally, as this type of anti-fogging device, there is a device that employs a heating wire attached to the inner surface of the rear glass and prevents the rear glass from being fogged by energizing the heating wire to heat the rear glass. (For example, refer to Patent Document 1).
Japanese Patent Laid-Open No. 11-208421

  However, the above-described anti-fogging device has a problem that the visibility of the rear glass is deteriorated because the heating wire is attached to the surface of the glass.

    An object of the present invention is to provide a vehicular rear glass anti-fogging device that prevents the rear glass of a vehicle from being fogged while ensuring the visibility of the rear glass.

In order to achieve the above object, in the invention according to claim 1, an air outlet (31) that blows out air toward the vehicle interior,
A suction port (40) that is provided below the rear glass of the vehicle and sucks in air in the passenger compartment;
Air conditioning means (13) for adjusting the air condition;
A blower (12) that blows out the adjusted air whose state is adjusted by the air-conditioning means from the air outlet,
An air flow of the adjustment air that flows toward the suction port along the inner surface of the rear glass is generated.

  Therefore, since the air whose state has been adjusted by the air conditioning means flows along the inner surface of the rear glass, it is possible to prevent dew condensation from occurring on the inner surface of the rear glass.

  Moreover, in the invention according to claim 1, since the heating wire is not attached to the rear glass, the visibility of the rear glass is not hindered.

  As described above, fogging of the rear glass of the vehicle can be prevented while ensuring the visibility of the rear glass.

  However, as the air conditioning means, a heating means for heating the temperature of the air as in the invention described in claim 2 is adopted, or a dehumidifying means for dehumidifying the air as in the invention according to claim 3. It is necessary to adopt.

Specifically, as in the invention according to claim 4, the air conditioning means adjusts the state of the air sucked from the suction port,
You may comprise so that the duct (20) which ventilates the adjustment air which the state was adjusted by the said air-conditioning means toward the said blower outlet may be provided.

  In addition, the code | symbol in the bracket | parenthesis of each said means shows the correspondence with the specific means as described in embodiment mentioned later.

  1 and 2 show a schematic configuration of a vehicle rear glass antifogging device according to an embodiment of the present invention. FIG. 1 is a schematic view of a vehicle rear glass anti-fogging device viewed from the side of the vehicle, and FIG. 2 is a schematic view of the vehicle rear glass anti-fogging device viewed from above the vehicle.

  The vehicular rear glass antifogging device includes a rear air conditioning unit 10 and left and right ducts 20, and the rear air conditioning unit 10 is disposed below the rear tray 4 in the trunk room on the rear side of the rear seat 2. The rear air conditioning unit 10 includes a casing 11, a blower 12, and a heat exchanger 13 for heating.

  The blower 12 is housed in the casing 11 together with the heat exchanger 13 for heating. The blower 12 generates an air flow by driving an electric motor, and sucks air from the suction port 40. The air is sent to the heat exchanger 13 for heating.

  Here, the suction port 40 is arranged on the lower side of the rear glass 1, and the suction port 40 is formed in the rear tray 4 so as to have a strip shape extending in the width direction. The dimension of the suction port 40 in the width direction (left-right direction) is set to be substantially the same as the dimension of the rear glass 1 in the width direction (left-right direction).

  The heating heat exchanger 13 is a heat exchanger that generates high-temperature air (conditioned air) by heating air with cooling water (warm water) of the traveling engine. The warm air heated by the heat exchanger is passed through the left duct 20 and the right duct 20 to the ceiling side ventilation path 30. As shown in FIGS. 1 and 2, the left duct 20 and the right duct 20 are provided in left and right C pillars disposed on the vehicle rear side. In FIG. 1, only the left duct 20 is shown.

  As shown in FIG. 1, the ceiling side ventilation path 30 is provided in a flat shape between the ceiling base material 32 of the vehicle and the heat insulating sheet material 33 on the upper side, and is sent from the left duct 20 and the right duct 20. Ventilate the wind. The ceiling base material 32 is provided with a plurality of holes 31 over the entire surface, and the plurality of holes 31 play a role of blowing warm air into the passenger compartment.

  Next, the effect of the vehicle rear glass antifogging device of this embodiment will be described with reference to FIG.

  First, when the air blower 12 sucks in the surrounding air from the suction port 40 and sends the air toward the heat exchanger 13 for heating, the heat exchanger 13 for heating heats the air and the hot air is heated for heating. It will be blown out from the exchanger 13.

  Then, the warm air is passed through the left duct 20 and the right duct 20 to the ceiling side ventilation path 30. Then, warm air is blown out from the ceiling side ventilation path 30 through the holes 31 of the ceiling base material 32 toward the vehicle interior.

  Here, among the plurality of hole portions 31, each hole portion 31 disposed in the vicinity of the upper side of the rear glass 1 is formed to open toward the upper side of the rear glass 1, and each hole portion 31 extends over the entire width direction of the rear glass 1. Hot air from is blown.

  On the other hand, as described above, since the blower 12 sucks air around the air inlet 40 from the air inlet 40, an air flow of high-temperature air flowing toward the air inlet 40 along the inner surface of the rear glass 1 is generated. For this reason, since the inner surface of the rear glass 1 is warmed by high-temperature air, the temperature of the inner surface of the rear glass 1 can be kept at a dew point or higher, so that dew condensation is prevented from occurring on the inner surface of the rear glass 1. Can do.

  Next, the effect of this embodiment is demonstrated. That is, the rear glass antifogging device for a vehicle according to the present embodiment includes a plurality of outlets 31 that blow out air toward the upper inner surface of the rear glass 1 of the vehicle, and a suction port that is provided below the rear glass 1 and sucks in ambient air. 40, a heating heat exchanger 13 that heats the air, and a blower 12 that blows out the warm air heated by the heating heat exchanger 13 from the air outlet 31, along the inner surface of the rear glass 1. Thus, an air flow of warm air flowing toward the suction port 40 is generated.

  Therefore, since the warm air heated by the heat exchanger 13 for heating flows along the inner surface of the rear glass 1, the inner surface of the rear glass 1 can be warmed, and the temperature can be kept above the dew point. It is possible to prevent condensation on the inner surface.

  Moreover, since a heating wire is not affixed on the rear glass 1 in this embodiment, the visibility of the rear glass 1 is not hindered. As described above, fogging of the rear glass 1 of the vehicle can be prevented while ensuring the visibility of the rear glass 1.

  Moreover, when employ | adopting the ceiling air conditioning which blows off warm air and cold air from the several hole part 31 by the side of a ceiling, the fogging of the rear glass 1 can be performed using a part of several hole part 31. FIG.

  Moreover, in this embodiment, since the warm air is blown out from the plurality of holes 31 on the ceiling side, a dedicated outlet that blows out the warm air from the lower side toward the rear glass 1 like a windshield antifogging device. Needless to say, it is not necessary to provide this.

(Other embodiments)
In the above-described embodiment, the suction port 40 has been described as functioning as an opening for taking air into the rear air conditioning unit 10. However, as the suction port 40, an exhaust port that exhausts air to the outside of the passenger compartment. You may make it fulfill | perform the function of.

  In the above-described embodiment, in order to generate an air flow of high-temperature air that flows along the inner surface of the rear glass 1, the hole portions 31 that are formed to open toward the upper side of the rear glass 1 are employed and the hole portions 31. The example in which the high-temperature air is blown out toward the inner surface of the rear glass 1 has been described. However, the present invention is not limited to this, and each hole 31 may blow out high-temperature air into the vehicle interior. In this case, the holes 31 are not limited to being provided on the ceiling, but may be provided at other parts such as pillars.

  In the above-described embodiment, an example in which a heating heat exchanger that heats air is used as the air conditioning means has been described. However, the present invention is not limited thereto, and a cooling heat exchanger that cools and dehumidifies air is used. It may be. A heating heat exchanger and a cooling heat exchanger may be used in combination.

  Here, the heat exchanger for cooling may be a heat exchanger that cools air using a refrigerant, or a Peltier element made of a semiconductor element that cools air by energization. The heating heat exchanger is not limited to a heat exchanger that uses engine cooling water, and an electric heater (heating wire) that heats air by energization may be used.

It is the schematic diagram which looked at the rear glass anti-fog device for vehicles of one embodiment concerning the present invention from the vehicles side. It is the schematic diagram which looked at the rear glass anti-fog device for vehicles from the vehicle upper direction.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Rear glass, 13 ... Heat exchanger for heating, 31 ... Air outlet, 40 ... Suction port.

Claims (4)

An air outlet (31) that blows air toward the passenger compartment;
A suction port (40) that is provided below the rear glass of the vehicle and sucks in air in the passenger compartment;
Air conditioning means (13) for adjusting the air condition;
A blower (12) that blows out the adjusted air whose state is adjusted by the air-conditioning means from the air outlet,
A rear glass antifogging device for a vehicle, characterized in that an air flow of the adjusted air flowing toward the suction port side along the inner surface of the rear glass is generated. The vehicle rear glass anti-fogging device according to claim 1, wherein the air-conditioning means is a heating means for heating the temperature of the air. The vehicle rear glass anti-fogging device according to claim 1, wherein the air-conditioning means is a dehumidifying means for dehumidifying the air. The air-conditioning means adjusts the state of air sucked from the suction port,
The vehicle rear glass prevention according to any one of claims 1 to 3, further comprising a duct (20) through which the adjusted air whose state is adjusted by the air-conditioning means flows toward the outlet. Fogging equipment.

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