JP2018100011A - Freezing prevention device for vehicle headlamp - Google Patents

Abstract

A vehicle headlamp can be effectively prevented from freezing in an environment where the outside air temperature is low. An outside air temperature detection sensor for detecting an outside air temperature of a vehicle, a vehicle speed detection sensor for detecting the speed of the vehicle, and an air conditioning unit mounted on the vehicle based on detection results by the outside air temperature detection sensor and the vehicle speed detection sensor. And a control unit that is heated by the heat dissipation of the capacitor when the detection result by the outside air temperature detection sensor is equal to or less than a predetermined value and the vehicle speed detection sensor detects the stop of the vehicle. Reverse rotation is performed so that the direction of rotation of the condenser fan 110 flows in the direction opposite to the direction in which the wind used for heat dissipation of the condenser is circulated so that warm air is blown to the outer surface side of the outer cover 3 through the passage 113. Let [Selection] Figure 3

Description

  The present invention relates to an anti-freezing device for a vehicle headlamp, and is particularly suitable for preventing freezing of a headlamp.

  2. Description of the Related Art In recent years, in vehicle headlamps (particularly, headlamps) mounted on vehicles such as automobiles, HID lamps (High Intensity Discharge lamps) and semiconductors are used as light sources arranged in the lamp body constituting the headlamp. Devices using LEDs (Light Emitting Diodes), which are light emitting elements of the type, have been widely used.

  Such HID lamps and LEDs can not only greatly reduce power consumption while also improving visibility with high brightness compared to conventional halogen lamps, but also reduce the amount of heat generated during lighting. Long life and excellent durability.

  By the way, in the vehicle headlamp, measures for avoiding freezing in an environment where the outside air temperature is low are conventionally taken. In particular, there is a growing demand for anti-freezing measures for light sources that generate a small amount of heat during lighting as described above. For example, in the vehicle headlamp disclosed in Patent Document 1, a stay that abuts and grips the outer periphery of a lamp body (lamp body) is formed in a hollow shape, and the inside of the stay is used as a water passage. A heat exchanger such as a radiator is used. The heat exchange medium used in was distributed. Thereby, since a heat exchange medium distribute | circulates the inside of a stay, it can suppress suitably that ice and snow etc. adhere to a headlamp.

JP 2005-129294 A

However, in the vehicle headlamp described in Patent Document 1, the air guide duct 27 and the first flow path 29 are in contact with the lamp body as shown in the cross-sectional views of FIGS. Since the warm air is guided to the outer lens side disposed on the front surface of the lamp body so as to bypass the lamp body, that is, the warm air is not directly guided to the outer lens. There was a possibility that the ice and snow adhering to the surface (outer surface) of the outer lens could not be melted quickly, and the effect of preventing freezing could not be obtained sufficiently.
In particular, in recent HID lamps and LEDs, the amount of heat generated during lighting is low and the amount of heat dissipated from the inside of the lamp body is small. It is.

  Therefore, the present invention has been made in view of the above-described circumstances, and provides a vehicle headlamp anti-freezing device that can effectively prevent the vehicle headlamp from freezing in an environment where the outside air temperature is low. The purpose is to do.

(1) An antifreezing device for a vehicle headlamp according to at least one embodiment of the present invention is disposed at a front portion of a vehicle, and freezes a vehicle headlamp that emits light emitted from a light source toward the front of the vehicle. Prevention device,
The vehicle headlamp includes a lamp unit that houses the light source and includes a lamp body having a front surface opened, and an outer cover disposed on a front surface of the lamp body so as to cover the opening of the lamp body. And an outside air temperature detecting means for detecting the outside air temperature of the vehicle, a speed detecting means for detecting the speed of the vehicle, and the vehicle based on the detection results by the outside air temperature detecting means and the speed detecting means. Control means for controlling a heat exchange device that generates heat, and the heat exchange device comprises air blowing means for sending wind used during heat dissipation, and the control means is detected by the outside air temperature detection means. When the result is less than a predetermined value and the speed detecting means detects the stop of the vehicle, the air blowing means is switched to the direction opposite to the driving direction at the time of heat radiation to dissipate heat from the heat exchange device. The warm air that has been warmed I, and characterized in that blown to the outside front of the outer cover.

According to the configuration of (1), the heat exchange device includes a control unit that controls a heat exchange device that is mounted on a vehicle and generates heat based on the detection results of the outside air temperature detection unit and the speed detection unit. , It is provided with a blowing means for sending wind used for heat dissipation.
Then, when the detection result by the outside air temperature detection means is equal to or less than a predetermined value and the speed detection means detects the stop of the vehicle, the control means switches the air blowing means to be in the direction opposite to the driving direction at the time of heat dissipation. The warm air heated with the heat radiation of the heat exchange device is blown toward the outer surface of the outer cover. Thereby, the ice and snow adhering to the outer surface side of the outer cover can be effectively melted.
In this way, it is possible to achieve a vehicle headlamp anti-freezing device that can effectively prevent the vehicle headlamp from freezing in an environment where the outside air temperature is low.

(2) In some embodiments, in the configuration of (1),
The heat exchanging device is a condenser of a vehicle air conditioning unit, the blowing means is a condenser fan for releasing heat of the condenser, and the control means has a detection result by the outside air temperature detecting means that is a predetermined value or less. When the speed detection means detects the stop of the vehicle, the condenser fan is rotated in the reverse direction with respect to the driving direction at the time of heat dissipation, and the warm air warmed with the heat dissipation of the capacitor is passed through the passage. And controlling to send air to the outer front side of the outer cover.

  According to the configuration of (2), the heat exchange device mounted on the vehicle and generating heat is a condenser of the vehicle air conditioning unit, and the blowing means is a condenser fan for releasing the heat of the condenser. It is not necessary to add a new device as a heat exchange device that generates heat. Therefore, it is possible to avoid the increase in cost by effectively utilizing the existing air conditioning unit without reducing the space in the engine room.

(3) In some embodiments, in the configuration of (1),
The heat exchange device is a radiator of a radiator unit, the air blowing means is a radiator fan for releasing the heat of the radiator, and the control means has a detection result by the outside air temperature detecting means that is not more than a predetermined value. When the stop of the vehicle is detected by the speed detection means, the radiator fan is rotated in the reverse direction with respect to the driving direction at the time of heat dissipation, and the warm air warmed along with the heat dissipation of the radiator is passed through the passage. And controlling to blow air toward the outer surface of the outer cover.

  According to the configuration of (3), since the heat exchange device that generates heat mounted on the vehicle is a radiator of the radiator unit, and the blower means is a radiator fan for releasing the heat of the radiator, It is not necessary to add a new device as a device generating Therefore, an increase in cost can be avoided by effectively utilizing the existing radiator unit without reducing the space in the engine room.

  (4) In some embodiments, in any one of the configurations (1) to (3), the warm air outlet disposed at the end portion on the outer cover side is the outer surface side of the outer cover. It is arrange | positioned in the at least one of the side of the center part side of the said vehicle, or the downward direction of the said outer cover.

According to the configuration of (4), the warm air outlet disposed at the end on the outer cover side is
Since it is arranged on the outer surface side of the outer cover on at least one of the side of the central portion of the vehicle or the lower side of the outer cover, the warm air heated with the heat radiation of the device is moved to the outer surface side of the outer cover. The air and air can be evenly blown, and ice and snow adhering to the outer surface of the outer cover can be melted more effectively. In addition, it is possible to avoid the air outlet from being conspicuous in appearance and maintain the appearance without impairing the appearance.

  According to at least one embodiment of the present invention, it is possible to effectively prevent freezing of the vehicle headlamp in an environment where the outside air temperature is low.

It is a mimetic diagram showing the front part of vehicles provided with the freeze prevention device of the vehicular headlamp concerning the embodiment of the present invention. It is a conceptual diagram which shows the structure of the freezing prevention apparatus of the vehicle headlamp which concerns on 1st embodiment. It is a conceptual diagram with which it uses for description of the blowing from the side in an outer cover in the freezing prevention apparatus of the vehicle headlamp which concerns on 1st embodiment. It is a conceptual diagram with which it uses for description of the blowing from the lower part in an outer cover in the freezing prevention apparatus of the vehicle headlamp which concerns on 1st embodiment. It is a conceptual diagram which shows the air conditioning unit containing the capacitor | condenser fan of FIG. It is a conceptual diagram which shows the structure of the freezing prevention apparatus of the vehicle headlamp which concerns on 2nd embodiment. It is a conceptual diagram with which it uses for description of the blowing from the side in an outer cover in the freezing prevention apparatus of the vehicle headlamp which concerns on 2nd embodiment. It is a conceptual diagram with which it uses for description of the blowing from the lower part in an outer cover in the freezing prevention apparatus of the vehicle headlamp which concerns on 2nd embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the shapes of the component parts described in the following embodiments and the relative arrangement thereof are not intended to limit the scope of the present invention only to specific examples unless otherwise specifically described. Absent. In the following description, directions indicated as front and rear, left and right, and up and down mean the front and rear direction of the vehicle body, the vehicle width direction, and the vertical and vertical direction of the vehicle body unless otherwise specified.

<About vehicle>
FIG. 1 is a schematic view of a vehicle C equipped with a vehicle headlamp anti-freezing device according to an embodiment of the present invention as seen from the left side in the vehicle width direction. As shown in FIG. 1, a vehicle C includes a front grill 9 at the center of the front (front) of the vehicle, and headlamps as vehicle headlamps on the left and right sides sandwiching the front grill 9. 1 is provided. Here, for the sake of convenience, only the left headlamp 1 is shown, but it is also assumed that a headlamp whose structure is inverted horizontally is also provided on the right side.

  An engine hood 7 (so-called bonnet) is provided above the headlamp 1 in the vehicle C so as to extend in the vehicle front-rear direction, and a front bumper 8 extends in the vehicle width direction below the headlamp 1. Is provided. Further, an air outlet 91 to be described later is provided on the side of the front grille 9 in the vehicle width direction (that is, the side facing the headlamp 1), and the front bumper 8 is located below the headlamp 1 at a portion thereof. A blower outlet 81 to be described later is provided.

<Vehicle headlamp freeze prevention device>
<First embodiment>
Next, a freeze prevention device for a vehicle headlamp mounted on the vehicle C will be described. As shown in FIG. 2, the antifreezing device for a vehicle headlamp according to the present embodiment detects an outside air temperature detection sensor 30 as an outside air temperature detecting means for detecting the outside air temperature of the vehicle C, and detects the speed of the vehicle C. And a vehicle speed detection sensor 31 as a speed detection means. In addition, this freeze prevention device is an air conditioning unit 100 (more specifically, a device that generates heat mounted on the front portion of the vehicle C based on detection results by the outside air temperature detection sensor 30 and the vehicle speed detection sensor 31. And a control unit 32 as control means for controlling the condenser fan 110) described later. It should be noted that the outside air temperature detection sensor 30 and the vehicle speed detection sensor 31 can also utilize an outside air temperature detection means (not shown) and a vehicle speed detection means (not shown) of an air conditioner mounted on the vehicle C, respectively.

  Here, as shown in FIGS. 3 and 4, the headlamp 1 includes a lamp body 2 having an open front surface and a colorless and transparent outer cover 3 that covers the front opening of the lamp body 2. A lamp chamber 10 is provided by the main body 2 and the outer cover 3. In the lamp chamber 10, an LED (Light Emitting Diode) 4 that is a semiconductor light source, an inner lens 5 as a projection lens, and an extension reflector 6 that makes up the interior of the lamp chamber 10 are housed. .

The LED 4 is fixed to a substantially central portion of the bottom surface of the lamp body 2 when viewed from the front surface through the substrate 41 in a state where the LED 4 is mounted on the front surface of the substrate 41. The LED 4 has an optical axis Ax along the front-rear direction, and emits white light substantially radially forward about the optical axis Ax.
Specifically, the LED 4 is a known LED having a semiconductor light emitting element and a phosphor (none of which is shown) disposed on the front surface of the semiconductor light emitting element. In the LED 4, blue light is emitted as excitation light of the phosphor from the semiconductor light emitting element, and the blue light excites a phosphor made of, for example, YAG (Y ₃ Al ₅ O ₁₂ : Ce ³⁺ ) to emit from the phosphor. As a result of the yellow light being emitted, the blue light and the yellow light are mixed (mixed), and white light is emitted. The board 41 on which the LED 4 is mounted is fixed to the bottom surface of the lamp body 2 by two fixing screws 42, 42, and heat generated from the LED 4 is transmitted to the lamp body 2 through the board 41, so that the lamp body 2 It is dissipated from a plurality of radiating fins 21 provided on the rear surface.

  The inner lens 5 is an aspherical convex lens having a concave entrance surface (rear surface) and a convex exit surface (front surface), and the front surface of the LED 4 with the exit surface exposed forward from the opening of the extension reflector 6. Is arranged. The inner lens 5 has a focal point located in the vicinity of the LED 4 and irradiates light emitted from the LED 4 forward. Specifically, the inner lens 5 is formed of a colorless translucent material, and performs light distribution control by irradiating the white light emitted from the LED 4 forward.

  The extension reflector 6 is a component that functions as a reflector and an extension made of a non-translucent resin base material, and has a reflective surface 61 formed on the front side surface by aluminum vapor deposition or the like. The extension reflector 6 is disposed so as to cover the inside of the opening in front of the lamp main body 2 located around the inner lens 5 in the lamp chamber 10 so as to make up the interior of the lamp chamber 10.

The outer cover 3 is a transparent cover made of a colorless, translucent or translucent translucent member such as glass or resin material, and is disposed so as to cover the entire open front surface in front of the lamp body 2. . Further, the outer cover 3 and the lamp body 2 are fixed to each other at the respective peripheral portions.
Here, the appearance of the headlamp 1, that is, the case where the outer cover 3 and the front opening of the lamp body 2 are both formed in a rectangular shape when viewed from the front is illustrated, but is not limited to this example. As the shape, various other shapes (for example, a circular shape or an elliptical shape) can be widely applied. The outer cover 3 may be configured as a lens.

  As shown in FIGS. 1 and 3, a condenser fan 110 (included in the air conditioning unit 100 in FIG. 2) is included in the side portion of the headlamp 1 thus configured on the vehicle center side (that is, the front grille 9 side). The air outlet 91 of the passage 113 provided between the outer cover 3 and the outer cover 3 will be described in detail later. The passage 113 communicates the outer front side of the condenser fan 110 and the outer cover 3 and allows a part of the wind used for heat dissipation of the condenser 102 to be taken in from the outside and circulated.

  As shown in FIGS. 1 and 4, a passage 114 provided between the condenser fan 110 and the outer cover 3 is disposed inside the front bumper 8 (on the engine room side). A blower outlet 81 of the passage 114 is disposed on the upper surface side of the front bumper 8 located. The passage 114 communicates the outer front side of the condenser fan 110 and the outer cover 3 and takes in a part of the wind used for heat dissipation of the condenser 102 from the outside and distributes it.

  Next, the air conditioning unit 100 will be described. As shown in FIG. 4, the air conditioning unit 100 includes a compressor 101 as a compressor that compresses refrigerant, and a condenser 102 as a condenser that releases heat by exchanging heat between the refrigerant compressed by the compressor 101 and the outside air. The evaporator 103 is roughly divided into an evaporator 103 as an evaporator that heat-exchanges the refrigerant cooled by the condenser 102 with air in a passenger compartment (not shown) of the vehicle C to cool the air in the passenger compartment.

  The evaporator 103 includes an evaporator fan (not shown), a temperature sensor 107, an expansion valve 108, and the like. The evaporator 103 evaporates the refrigerant and cools the air by heat-exchanging the refrigerant sent from the condenser 102 via the high-temperature / high-pressure pipe 104 and the expansion valve 108 with the air in the passenger compartment.

  At this time, the expansion valve 108 injects the liquid refrigerant cooled by the condenser 102 to reduce the pressure and forms a low-temperature / low-pressure mist so that the liquid refrigerant can be easily vaporized (evaporated) ( Promotes vaporization of refrigerant). Thereafter, the refrigerant is returned to the compressor 101 via the low pressure / return pipe 105. An evaporator fan (not shown) is formed of, for example, a turbo fan, and is rotated by an evaporator fan motor (not shown) to send air cooled by the evaporator 103 into the vehicle interior.

  The temperature sensor 107 detects the temperature in the vehicle interior, and sends a signal corresponding to the detected temperature to an air conditioning control unit and an air conditioning drive unit (not shown) in order to control temperature management in the vehicle interior. The evaporator 103 is provided with a hot gas pipe 106 in parallel with the high-temperature / high-pressure pipe 104 and the low-pressure / return pipe 105 as refrigerant pipes. It is also possible to heat the air. This is a hot gas pipe that uses a high-temperature / high-pressure pipe 104 that passes through the condenser 102 during cooling, and that directly sends the gas compressed by the compressor 101 to the evaporator 103 without heating through the condenser 102 during heating. This is possible by using 106.

  The compressor 101 includes an accumulator (not shown) and the like. The accumulator functions as a refrigerant pool and is an element for returning the gaseous refrigerant to the compressor 101. The compressor 101 compresses the gaseous refrigerant into a high-temperature and high-pressure gas and sends it to the capacitor 102 via the high-temperature / high-pressure pipe 104. Alternatively, it is sent to the evaporator 103 via the hot gas pipe 106.

  The capacitor 102 includes a capacitor fan 110, a capacitor fan motor (not shown), an external temperature sensor (not shown), and the like. The capacitor 102 exchanges heat between the high-temperature and high-pressure refrigerant and the outside air to make the refrigerant liquid. The condenser fan 110 is rotated by a condenser fan motor (not shown), and sucks air from the internal space of the condenser and releases it to the outside (see the heat radiation direction indicated by the arrow in FIG. 2).

  The condenser 102 is arranged in an engine room (not shown), and the condenser fan 110 arranged in front of the condenser 102 sends wind from the front side to the rear side of the vehicle C so that the condenser 102 can dissipate heat. (In the direction of arrow E in FIG. 5). That is, the condenser fan 110 sends the outside air taken from the front of the vehicle to the condenser 102, generates an air flow so as to be discharged toward the rear of the vehicle through the inside of the condenser 102, and between the condenser 102. It is possible to perform heat exchange efficiently.

In the anti-freezing device for the headlamp 1 according to the present embodiment, when the control unit 32 detects that the detection result by the outside air temperature detection sensor 30 is equal to or less than a predetermined value and the vehicle speed detection sensor 31 detects the stop of the vehicle C. The driving state of the condenser fan 110 in the air conditioning unit 100 is opposite to the driving direction at the time of heat dissipation (that is, the direction in which the condenser fan 110 is rotating when the air conditioning unit 100 is normally operated). The warm air heated by the heat radiation of the condenser 102 is blown from the blower outlet 91 or the blower outlet 81 to the outer surface side of the outer cover 3 through the passages 113 and 114 (in the direction of arrow F in FIG. 5). . As a result, it is possible to effectively melt ice and snow adhering to the outer front side of the outer cover 3.
In addition, the blower outlets 81 and 91 should just be provided in at least one.

  In addition, the control by the control unit 32 controls the rotation direction of the condenser fan 110 under the condition of the outside air temperature and the stop state of the vehicle in a state in which the air conditioning unit 100 is stopped after the air conditioning unit 100 is operated once. Is.

  As described above, according to the anti-freezing device for the headlamp 1 of the present embodiment, the condenser fan 110 mounted on the front portion of the vehicle C and the outer cover 3 are communicated with each other. Passages 113 and 114 are provided for circulating the wind used for heat radiation of the air 102.

  When the detection result by the outside air temperature detection sensor 30 is not more than a predetermined value and the vehicle speed detection sensor 31 detects the stop of the vehicle C, the control unit 32 sets the driving state of the condenser fan 110 as the driving direction at the time of heat dissipation. Is switched to the opposite direction, and the warm air warmed by the heat radiation of the capacitor 102 is blown to the outer surface side of the outer cover 3 through the passages 113 and 114. Thereby, the ice and snow adhering to the outer surface side of the outer cover 3 can be effectively melted. Thus, it is possible to effectively prevent the headlamp 1 from freezing in an environment where the outside air temperature is low.

<Second embodiment>
Next, a second embodiment of the antifreezing device for the headlamp 1 mounted on the vehicle C will be described. As shown in FIG. 6 in which parts corresponding to those in FIG. 2 are assigned the same reference numerals, the anti-freezing device for the headlamp 1 according to this embodiment is a radiator unit as a device for generating heat mounted on the front part of the vehicle C. Except for applying 120, the configuration is almost the same as that of the first embodiment described above, and thus the description of the same configuration is omitted.

  In this case, the headlamp 1 is configured in the same manner as in the first embodiment described above, as shown in FIGS. Air outlets 81 and 91 are provided on the side portions as in the first embodiment described above. In the present embodiment, the anti-freezing device is different from the condenser fan 110 in that the radiator fan 121 is applied and the passages 123 and 124 provided between the radiator fan 121 and the outer cover 3 are different. Except for this, the configuration is the same as in the first embodiment described above.

In the case of the present embodiment, the radiator unit 120 as a device has a radiator 122 disposed at the rear portion of the front grill 9 and a radiator fan 121 disposed at the rear portion of the radiator 122 as shown in FIG. These are assembled to the vehicle C via the radiator support 125.
In the case of the present embodiment, a passage 123 provided between the radiator fan 121 and the outer cover 3 is disposed in the front grille 9 in front of the radiator 122. Similarly, a passage 124 provided between the radiator fan 121 and the outer cover 3 is disposed inside the front bumper 8 (engine room side). The passages 123 and 124 communicate with the radiator fan 121 and the outer front side of the outer cover 3, and are used to take in and distribute a part of the wind used for heat dissipation of the radiator 122 from the outside.

In the anti-freezing device for the headlamp 1 according to the present embodiment, when the control unit 32 detects that the detection result by the outside air temperature detection sensor 30 is equal to or less than a predetermined value and the vehicle speed detection sensor 31 detects the stop of the vehicle C. The driving direction (rotation direction) of the radiator fan 121 is normally switched to the direction opposite to the direction of rotation when the radiator 122 is cooled (dissipated heat), and warmed with the radiator 122 heat dissipation. The generated warm air is blown from the blower outlet 91 or the blower outlet 81 to the outer front side of the outer cover 3 through the passages 123 and 124. Normally, it flows in the direction of arrow G in FIG. 7, and in the case of preventing freezing, it flows in the direction of arrow H in FIG.
As a result, it is possible to effectively melt ice and snow adhering to the outer front side of the outer cover 3. In addition, the blower outlets 81 and 91 should just be provided in at least one.

  In addition, the control by the control unit 32 is such that after the radiator unit 120 is once operated, the function of the radiator unit 120 is stopped, and the rotation direction of the radiator fan 121 is changed on condition that the outside air temperature and the vehicle are stopped. It is something to control.

As described above, according to the antifreezing device for the headlamp 1 of the present embodiment, the radiator fan 121 mounted on the front portion of the vehicle C and the outer cover 3 are communicated with each other so that the radiator Passages 123 and 124 for circulating the wind used for heat dissipation 122 are provided.
Then, when the detection result by the outside air temperature detection sensor 30 is equal to or less than a predetermined value and the vehicle speed detection sensor 31 detects the stop of the vehicle C, the control unit 32 sets the driving state of the radiator fan 121 as the driving direction at the time of heat dissipation. Are switched so as to be in the opposite direction, and the warm air warmed by the heat radiation of the radiator 122 is blown to the outer surface side of the outer cover 3 through the passages 123 and 124.
Thereby, the ice and snow adhering to the outer surface side of the outer cover 3 can be effectively melted. Thereby, freezing of the headlamp 1 under an environment where the outside air temperature is low can be effectively prevented.

  Further, as shown in FIG. 7, when freezing is prevented, it flows in the direction of arrow H in FIG. That is, it passes through the radiator 122 in the reverse direction (arrow H direction) from the inside to the outside of the engine room, and the warm air heated by the heat radiation of the radiator 122 is directly bypassed, that is, bypassing the lamp body. Since the arrangement is not such that the hot air is guided to the front side of the lamp body, the temperature drop of the hot air is suppressed. As a result, it is possible to efficiently melt ice and snow adhering to the surface of the outer lens.

  In the above-described embodiment, the case where the front grill 9 is provided at the center of the front surface of the vehicle as the vehicle C has been described. However, the present invention is not limited to this, and the front hood 9 is not provided. It may be a so-called grillless type vehicle in which the front center of the vehicle extends to the front of the vehicle or the center of the front bumper 8 extends to the upper front of the vehicle. In this case, the above-described air outlet 91 is provided on both sides of the front central portion of the engine hood 7 that extends to the front of the vehicle or on both sides of the central portion of the front bumper 8 that extends to the upper front of the vehicle. It becomes.

  In the above-described embodiment, the case where the LED 4 is applied as the light source of the headlamp 1 which is a vehicle headlamp has been described. However, the present invention is not limited to this, and the light source may be an HID lamp, Light sources such as halogen lamps can be widely applied.

  Further, the device for generating heat mounted on the front portion of the vehicle is not limited to the condenser fan 110 for radiating the condenser 102 of the air conditioning unit 100 and the radiator fan 121 for radiating the radiator 122, Various devices can be widely applied.

  According to the present invention, the vehicle headlamp can be effectively prevented from freezing in an environment where the outside air temperature is low. Therefore, the light emitted from the light source disposed at the front of the vehicle is emitted toward the front of the vehicle. It is suitable for use in all vehicles equipped with vehicle headlamps.

1 Head lamp 2 Lamp body 3 Outer cover 4 LED (light source)
7 Engine hood 8 Front bumper 81 Air outlet (air outlet below the outer cover)
9 Front grill 91 Air outlet (air outlet on the side of the center of the vehicle on the outer front side of the outer cover)
100 Air conditioning unit 102 Condenser (Heat exchange equipment)
110 Condenser fan 113, 114 Passage 120 Radiator unit 121 Radiator fan 122 Radiator (Heat exchange equipment)
123, 124 Passage C Vehicle

Claims (4)

An anti-freezing device for a vehicle headlamp that is disposed at the front of a vehicle and emits light emitted from a light source toward the front of the vehicle,
The vehicle headlamp is
A lamp body containing the light source and having a front surface opened;
An outer cover disposed on the front surface of the lamp body so as to cover the opening of the lamp body, and a lamp unit including
An outside air temperature detecting means for detecting the outside air temperature of the vehicle;
Speed detecting means for detecting the speed of the vehicle;
Control means for controlling a heat exchange device mounted on the vehicle and generating heat based on detection results by the outside air temperature detection means and the speed detection means,
The heat exchange device includes a blowing means for sending wind used during heat dissipation,
When the detection result by the outside air temperature detection means is equal to or less than a predetermined value and the speed detection means detects the stop of the vehicle, the control means makes the air blowing means in a direction opposite to the driving direction during heat dissipation. The anti-freezing device for a vehicle headlamp is characterized in that the warm air heated by the heat exchange of the heat exchange device is blown to the outer surface side of the outer cover. The heat exchange device is a condenser of a vehicle air conditioning unit, and the air blowing means is a condenser fan for releasing heat of the condenser;
The control means includes
When the detection result by the outside air temperature detecting means is less than a predetermined value and the stop of the vehicle is detected by the speed detecting means, the condenser fan is rotated in the reverse direction with respect to the driving direction at the time of heat dissipation, and the heat dissipation of the capacitor is performed. 2. The vehicle headlamp freeze prevention device according to claim 1, wherein the warm air warmed along with the air is controlled to be blown toward the outer front side of the outer cover. The heat exchanging device is a radiator of a radiator unit, and the blowing means is a radiator fan for releasing heat of the radiator;
The control means includes
When the detection result by the outside air temperature detection means is less than a predetermined value and the stop of the vehicle is detected by the speed detection means, the radiator fan is rotated in the reverse direction with respect to the driving direction at the time of heat dissipation, and the heat dissipation of the radiator is performed. 2. The vehicle headlamp freeze prevention device according to claim 1, wherein the warm air warmed along with the air is controlled to be blown toward the outer front side of the outer cover. A hot air outlet provided at the end on the outer cover side,
The front for a vehicle according to any one of claims 1 to 3, wherein the vehicle front is disposed on at least one of a side of a central portion side of the vehicle on an outer front side of the outer cover or a lower side of the outer cover. Freezing prevention device for lighting.

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