CN209909794U - Cooling unit and vehicle lamp - Google Patents
Cooling unit and vehicle lamp Download PDFInfo
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- CN209909794U CN209909794U CN201920173695.1U CN201920173695U CN209909794U CN 209909794 U CN209909794 U CN 209909794U CN 201920173695 U CN201920173695 U CN 201920173695U CN 209909794 U CN209909794 U CN 209909794U
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- Prior art keywords
- heat
- cooling unit
- peltier element
- heat sink
- lamp
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/25—Projection lenses
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
- F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
- F21S45/40—Cooling of lighting devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
- F21S45/40—Cooling of lighting devices
- F21S45/47—Passive cooling, e.g. using fins, thermal conductive elements or openings
- F21S45/48—Passive cooling, e.g. using fins, thermal conductive elements or openings with means for conducting heat from the inside to the outside of the lighting devices, e.g. with fins on the outer surface of the lighting device
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
- F21V29/503—Cooling arrangements characterised by the adaptation for cooling of specific components of light sources
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/54—Cooling arrangements using thermoelectric means, e.g. Peltier elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/60—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air
- F21V29/67—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air characterised by the arrangement of fans
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
- F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
- F21V29/76—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
- F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Abstract
Provided is a cooling unit capable of cooling the temperature of the internal space of a housing. The cooling unit (10) cools the temperature in the lamp chamber (106). The cooling unit (10) is provided with an outer heat sink (12) and a Peltier element (14), wherein the outer heat sink (12) is configured to expose a flat heat radiation fin (12c) to the outside of the lamp chamber (106), and the Peltier element (14) is provided with a heat absorption surface (14a) for absorbing heat from the air in the lamp chamber (106) and a heat radiation surface (14b) for radiating the heat absorbed by the heat absorption surface (14a) to the outer heat sink (12). A vehicle lamp using the cooling unit is also provided.
Description
Technical Field
The utility model relates to a cooling unit and used vehicle lamp of this cooling unit.
Background
Conventionally, there is known a vehicle lamp using a semiconductor light Emitting element such as an led (light Emitting diode) as a light source. In the case of using a semiconductor light emitting element as a light source of a vehicle lamp, it is necessary to satisfy a light quantity level required for the vehicle lamp by making the most use of light emission of the semiconductor light emitting element.
In general, when a large current is supplied to a semiconductor light emitting element in order to obtain a high output, heat generation increases, but when the element is heated to a high temperature due to the heat generation, light emission efficiency decreases. In order to efficiently dissipate heat from the semiconductor light emitting element, various heat dissipation structures for vehicle lamps have been proposed (see, for example, patent document 1).
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2006 and 286395
SUMMERY OF THE UTILITY MODEL
Problem to be solved by utility model
Conventionally, a large number of techniques for dissipating heat from semiconductor light emitting elements have been proposed, but in a lamp chamber of a vehicle lamp, in addition to the semiconductor light emitting elements, there is a possibility that devices having a low heat resistance temperature may be disposed. Therefore, it is desirable to be able to cool the temperature in the lamp chamber of the vehicle lamp.
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a cooling unit capable of cooling the temperature of the internal space of the housing, and a vehicle lamp using the cooling unit.
Means for solving the problems
In order to solve the above problem, the cooling unit according to one aspect of the present invention is a cooling unit that cools the temperature of the internal space of the housing, and the cooling unit includes an outer side heat sink and a peltier element, and the outer side heat sink is configured to be partially exposed to the outside of the housing, and the peltier element has a heat absorbing surface that absorbs heat from the internal space of the housing and a heat radiating surface that radiates the heat absorbed through the heat absorbing surface to the outer side heat sink.
The peltier device may further include an inner heat sink that receives heat from the internal space of the housing and conducts the heat to the heat absorbing surface of the peltier element.
The heat sink may further include a heat insulating member that blocks heat conduction between the outer heat sink and the inner heat sink.
The thermal conductive sheet may be disposed between the base portion of the inner heat sink and the heat absorbing surface of the peltier element, and/or the thermal conductive sheet may be disposed between the base portion of the outer heat sink and the heat dissipating surface of the peltier element.
An inner fan may be further provided for blowing air in the internal space of the housing toward the heat absorbing surface of the peltier element.
The air conditioner may further include an inner fan that sucks air in the internal space of the casing and blows the air in a predetermined direction.
The heat sink may further include an outer fan for blowing air outside the housing toward the outer exposed portion of the outer heat sink.
The water absorbing device may further include a moisture absorbing body for absorbing moisture generated in the internal space of the casing.
The moisture absorber may be disposed on a peripheral portion of a surface of the inner heat sink opposite to the surface on the peltier element side.
Another aspect of the present invention relates to a vehicle lamp in which a lamp unit is accommodated in a lamp body formed by including an outer lens and a lamp main body. The vehicle lamp includes the cooling unit that cools the temperature inside the lamp body.
Effect of the utility model
According to the present invention, a cooling unit that can cool the temperature of the inner space of the housing and a vehicle lamp using the cooling unit can be provided.
Drawings
Fig. 1 is a schematic cross-sectional view of a vehicle lamp equipped with a cooling unit according to an embodiment of the present invention.
Fig. 2 is a schematic cross-sectional view of a vehicle lamp equipped with a cooling unit according to another embodiment of the present invention.
Fig. 3 is a schematic cross-sectional view of a vehicle lamp equipped with a cooling unit according to another embodiment of the present invention.
Fig. 4 is a schematic cross-sectional view of a vehicle lamp equipped with a cooling unit according to another embodiment of the present invention.
Fig. 5 is a schematic cross-sectional view of a vehicle lamp equipped with a cooling unit according to another embodiment of the present invention.
Fig. 6 is a schematic cross-sectional view of a vehicle lamp equipped with a cooling unit according to another embodiment of the present invention.
Fig. 7 is a schematic cross-sectional view of a vehicle lamp equipped with a cooling unit according to another embodiment of the present invention.
Fig. 8 is a schematic cross-sectional view of a vehicle lamp equipped with a cooling unit according to another embodiment of the present invention.
Description of the reference numerals
10. 20, 30, 40, 50, 60, 70, 80: a cooling unit; 12: an outer radiator; 14: a Peltier element; 22: an inner side heat sink; 30: a cooling unit; 32. 62: an inside fan; 52: an external fan; 64: an air duct; 73: a moisture absorbent body; 82: a heat insulating member; 100. 200, 300, 400, 500, 600, 700, 800: a vehicular lamp; 102: a lamp body; 104: an outer lens; 106: a lamp chamber; 108: a lamp unit; 110: an LED; 120: a flat plate heat sink.
Detailed Description
Hereinafter, a cooling unit according to an embodiment of the present invention will be described in detail with reference to the drawings. The cooling unit is capable of cooling the temperature of the inner space of the closed housing. In the following description, a case where the cooling unit is applied to a vehicle lamp will be described. In the present specification, when the terms "up", "down", "front", "rear", "left", "right", "inside", "outside", and the like, which indicate directions, are used, the terms refer to directions in a posture in which the vehicle lamp is mounted in the vehicle.
Fig. 1 is a schematic cross-sectional view of a vehicle lamp 100 equipped with a cooling unit 10 according to an embodiment of the present invention. As shown in fig. 1, the vehicle lamp 100 is configured such that a lamp unit 108 using a semiconductor light emitting element as a light source is housed in a lamp chamber 106, and the lamp chamber 106 includes a resin lamp body 102 opened in the front and an outer lens 104 formed of a translucent material and hermetically covering the front of the lamp body 102.
The lamp unit 108 is a so-called projection type lamp unit, and uses LEDs as light sources. In the illustrated example, one lamp unit 108 is provided in the lamp chamber 106, but a plurality of lamp units 108 may be provided in the lamp chamber 106.
The lamp unit 108 includes an LED110, a reflector 114, a support member 116, and a projection lens 118. The LED110 is a white LED in which an LED chip 113 is mounted on a circuit board 112. The LED110 is disposed on the optical axis Ax in a state where the light emission direction is directed in a direction perpendicular to the optical axis Ax of the lamp unit 108. The LED110 is supplied with power via a wiring pattern formed on the circuit substrate 112.
The reflector 114 is formed in a half dome shape by using, for example, polycarbonate, and is disposed above the LED 110. The surface on the inner side of the reflector 114 has a reflecting surface for converging and reflecting light from the LED110 toward the front side toward the optical axis Ax.
The projection lens 118 is configured by a plano-convex aspheric lens having a convex front surface and a flat rear surface, and irradiates a light source image formed on a rear focal plane forward as a reverse image. The support member 116 is formed by casting a metal containing aluminum as a main component, and the LED110 and the reflector 114 are fixedly mounted on the upper surface thereof, and the reflector 114 has a reflecting surface based on an elliptic curved surface.
A plurality of flat fins 120 are erected in parallel at predetermined intervals on the rear side end portion of the support member 116. The plate fins 120 are formed so that the extending direction is oriented in the vertical direction. The extending direction of the flat plate fins 120 refers to the longitudinal direction of the flat plate fins 120. The flat plate heat sink 120 dissipates heat generated from the LEDs 110 into the air within the lamp chamber 106.
The lamp unit 108 is tiltably attached to the lamp body 102 by a support member, not shown, so that light emitted from the lamp unit 108 is irradiated toward the front of the vehicle lamp 100. In the present embodiment, the lamp unit 108 is provided near the center of the lamp chamber 106.
The vehicle lamp 100 includes a cooling unit 10 that cools the temperature in the lamp chamber 106. As shown in fig. 1, the cooling unit 10 includes an outer heat sink 12, a peltier element 14, and a current control unit (not shown) that controls a current supplied to the peltier element 14. Although the cooling unit 10 is attached to the lower surface 102a of the lamp body 102 in the present embodiment, the cooling unit 10 may be provided on the rear surface 102b and the upper surface 102c of the lamp body 102. A hole 102d is formed in the lower surface 102a of the lamp body 102, and the cooling unit 10 is attached to the lower surface 102a so as to close the hole 102 d.
The outer heat sink 12 includes a base portion 12a and a plurality of plate fins 12c erected on a lower surface 12b of the base portion 12 a. The outer heat sink 12 is fixed to the lower surface 102a of the lamp body 102 so that the flat fins 12c are exposed to the outside of the lamp chamber 106. In the present embodiment, the outer heat sink 12 is fixed to the lower surface 102a of the lamp body 102 by the screws 13, but the fixing method is not particularly limited. After the outer heat sink 12 is fixed to the lower surface 102a of the lamp body 102, the upper surface 12d of the base portion 12a of the outer heat sink 12 faces the inner space of the lamp chamber 106 through the hole portion 102d of the lamp body 102.
The peltier element 14 is disposed on the upper surface 12d of the base portion 12a of the outer heat sink 12. The peltier element 14 is a plate-shaped semiconductor element that moves heat from one surface to the other surface by flowing current. The peltier element 14 defines a heat absorbing surface and a heat dissipating surface according to the direction in which current flows. In the present embodiment, power is supplied to the peltier element 14 such that the upper surface of the peltier element 14 facing the lamp chamber 106 is formed as a heat absorbing surface 14a that absorbs heat from the internal space of the lamp chamber 106, and the lower surface of the peltier element 14 facing the upper surface 12d of the base portion 12a of the outer heat sink 12 is formed as a heat radiating surface 14b that radiates the heat absorbed by the heat absorbing surface 14a to the outer heat sink 12. The heat radiation surface 14b of the peltier element 14 may be in contact with the upper surface 12d of the base portion 12a, or a heat conductive sheet or the like may be interposed between the heat radiation surface 14b of the peltier element 14 and the upper surface 12d of the base portion 12 a.
The operation of the cooling unit 10 configured as described above will be described. In fig. 1, solid arrows indicate the flow of heat. When power is supplied to the peltier element 14 such that the upper surface is formed as the heat absorbing surface 14a and the lower surface is formed as the heat radiating surface 14b, the peltier element 14 absorbs heat from the air in the lamp chamber 106 through the heat absorbing surface 14a and radiates the heat from the heat radiating surface 14 b. The heat radiated from the heat radiation surface 14b of the peltier element 14 is conducted to the base portion 12a of the outer heat sink 12, and radiated from the flat plate heat radiation fins 12c to the outside of the lamp chamber 106.
As described above, by applying the cooling unit 10 according to the present embodiment to the vehicle lamp 100, the temperature in the lamp chamber 106 can be forcibly cooled. As the functions of the vehicle lamp are improved, electronic devices such as a camera, various sensors, and a dmd (digital Mirror device) may be installed in the lamp chamber, but the heat-resistant temperature of these electronic devices may not be too high. The temperature in the lamp chamber 106 is often high due to heat generation from the LEDs 110 of the lamp unit 108 and heat generation of the electronic devices and the like, but by using the cooling unit 10, the temperature in the lamp chamber 106 is lowered, and electronic devices having a heat-resistant temperature not too high can also be disposed in the lamp chamber 106.
Fig. 2 is a schematic cross-sectional view of a vehicle lamp 200 equipped with a cooling unit 20 according to another embodiment of the present invention. The same or corresponding components as those in the above embodiment are denoted by the same reference numerals, and overlapping description thereof is appropriately omitted.
The cooling unit 20 according to the present embodiment is different from the cooling unit 10 shown in fig. 1 in that it includes an inner heat sink 22 in addition to the outer heat sink 12 and the peltier element 14. The inner heat sink 22 includes a base portion 22a and a plurality of plate fins 22c erected on an upper surface 22b of the base portion 22 a. The inner heat sink 22 is disposed on the peltier element 14 such that the lower surface 22d of the base portion 22a abuts against the heat absorbing surface 14a of the peltier element 14. Alternatively, a heat conductive sheet or the like may be interposed between the lower surface 22d of the base portion 22a and the heat absorbing surface 14a of the peltier element 14.
The operation of the cooling unit 20 configured as described above will be described. In fig. 2, solid arrows indicate the flow of heat. In the present embodiment, power is also supplied to the peltier element 14 so that the upper surface is formed as the heat absorbing surface 14a and the lower surface is formed as the heat radiating surface 14 b. The inner heat sink 22 newly provided in the present embodiment receives heat of air in the lamp chamber 106 and conducts the heat to the heat absorbing surface 14a of the peltier element 14. The peltier element 14 absorbs heat from the inner heat sink 22 through the heat absorbing surface 14a and radiates the heat from the heat radiating surface 14 b. The heat radiated from the heat radiation surface 14b of the peltier element 14 is conducted to the base portion 12a of the outer heat sink 12, and radiated from the flat plate heat radiation fins 12c to the outside of the lamp chamber 106.
As described above, even when the cooling unit 20 according to the present embodiment is applied to the vehicle lamp 200, the temperature in the lamp chamber 106 can be forcibly cooled. As a result, the electronic device having a heat-resistant temperature not too high can be also disposed in the lamp chamber 106.
Fig. 3 is a schematic cross-sectional view of a vehicle lamp 300 equipped with a cooling unit 30 according to another embodiment of the present invention. The same or corresponding components as those in the above embodiment are denoted by the same reference numerals, and overlapping description thereof is appropriately omitted.
The cooling unit 30 according to the present embodiment is different from the cooling unit 10 shown in fig. 1 in that it includes an inner fan 32 in addition to the outer heat sink 12 and the peltier element 14. The inner fan 32 is an axial fan that discharges air drawn in from the axial direction in the axial direction. The inner fan 32 is arranged to blow air in the lamp chamber 106 toward the heat absorbing surface 14a of the peltier element 14. The inner fan 32 is supported above the peltier element 14 by a support member, not shown.
The operation of the cooling unit 30 configured as described above will be described. In fig. 3, solid arrows indicate the flow of heat, and hollow arrows indicate the flow of air. In the present embodiment, power is also supplied to the peltier element 14 so that the upper surface is formed as the heat absorbing surface 14a and the lower surface is formed as the heat radiating surface 14 b. In the present embodiment, the air in the lamp chamber 106 is blown to the heat absorbing surface 14a of the peltier element 14 by the inner fan 32. The peltier element 14 absorbs heat from the blown air through the heat absorbing surface 14a and radiates the heat from the heat radiating surface 14 b. The heat radiated from the heat radiation surface 14b of the peltier element 14 is conducted to the base portion 12a of the outer heat sink 12, and is radiated from the flat plate heat radiation fin 12c to the outside of the lamp chamber 106.
As described above, even when the cooling unit 30 according to the present embodiment is applied to the vehicle lamp 300, the temperature in the lamp chamber 106 can be forcibly cooled. As a result, the electronic device having a heat-resistant temperature not too high can be also disposed in the lamp chamber 106.
In addition, in the present embodiment, the air blown to the peltier element 14 by the inner fan 32 is cooled by heat exchange. The cooled air flows in the lamp chamber 106 along the inner surfaces of the outer lens 104 and the lamp body 102, and thus the lamp chamber 106 can be cooled over a wide range.
Fig. 4 is a schematic cross-sectional view of a vehicle lamp 400 equipped with a cooling unit 40 according to another embodiment of the present invention. The same or corresponding components as those in the above embodiment are denoted by the same reference numerals, and overlapping description thereof is appropriately omitted.
The cooling unit 40 according to the present embodiment is different from the cooling unit 20 shown in fig. 2 in that it includes an inner fan 32 in addition to the outer heat sink 12, the peltier element 14, and the inner heat sink 22. The inner fan 32 is an axial fan, and is arranged to blow air in the lamp room 106 toward the inner heat sink 22. The inner heat sink 22 is disposed such that the extending direction of the flat fins 22c is directed in the front-rear direction of the vehicle lamp 400.
The operation of the cooling unit 40 configured as described above will be described. In fig. 4, solid arrows indicate the flow of heat, and hollow arrows indicate the flow of air. In the present embodiment, power is also supplied to the peltier element 14 so that the upper surface is formed as the heat absorbing surface 14a and the lower surface is formed as the heat radiating surface 14 b. In the present embodiment, the air in the lamp room 106 is blown to the inner heat sink 22 by the inner fan 32. The inner heat sink 22 receives heat of air blown by the inner fan 32 and conducts the heat to the heat absorbing surface 14a of the peltier element 14. The peltier element 14 absorbs heat from the inner heat sink 22 through the heat absorbing surface 14a and radiates the heat from the heat radiating surface 14 b. The heat radiated from the heat radiation surface 14b of the peltier element 14 is conducted to the base portion 12a of the outer heat sink 12, and radiated from the flat plate heat radiation fins 12c to the outside of the lamp chamber 106.
As described above, even when the cooling unit 40 according to the present embodiment is applied to the vehicle lamp 400, the temperature in the lamp chamber 106 can be forcibly cooled. As a result, the electronic device having a heat-resistant temperature not too high can be also disposed in the lamp chamber 106.
In addition, in the present embodiment, the air blown to the inner radiator 22 by the inner fan 32 is cooled by heat exchange. The cooled air flows in the lamp chamber 106 along the inner surfaces of the outer lens 104 and the lamp body 102, and thus the lamp chamber 106 can be cooled over a wide range.
Fig. 5 is a schematic cross-sectional view of a vehicle lamp 500 equipped with a cooling unit 50 according to another embodiment of the present invention. The same or corresponding components as those in the above embodiment are denoted by the same reference numerals, and overlapping description thereof is appropriately omitted.
The cooling unit 50 according to the present embodiment is different from the cooling unit 10 shown in fig. 1 in that it includes an external fan 52 disposed outside the lamp chamber 106 in addition to the external heat sink 12 and the peltier element 14. The external fan 52 is an axial fan, and blows air outside the lamp chamber 106 toward the exposed portion of the outside heat sink 12, that is, toward the flat fins 12c and the lower surface 12b of the base portion 12 a. The outer heat sink 12 is disposed such that the extending direction of the flat fins 12c is directed in the front-rear direction of the vehicle lamp 500.
The operation of the cooling unit 50 configured as described above will be described. In fig. 5, solid arrows indicate the flow of heat, and hollow arrows indicate the flow of air. In the present embodiment, power is also supplied to the peltier element 14 so that the upper surface is formed as the heat absorbing surface 14a and the lower surface is formed as the heat radiating surface 14 b. In the present embodiment, as in the cooling unit 10 shown in fig. 1, heat is absorbed from the air in the lamp chamber 106 by the heat absorbing surface 14a of the peltier element 14, and the heat is radiated from the heat radiating surface 14 b. The heat radiated from the heat radiation surface 14b of the peltier element 14 is conducted to the base portion 12a of the outer heat sink 12, and radiated from the flat plate heat radiation fins 12c to the outside of the lamp chamber 106. Here, in the cooling unit 50 according to the present embodiment, since the air outside the lamp room 106 is blown to the flat fins 12c of the outer heat sink 12 and the like by the external fan 52, the heat exchange in the outer heat sink 12 can be promoted, and the heat radiation efficiency can be improved.
The cooling unit 20 shown in fig. 2, the cooling unit 30 shown in fig. 3, and the cooling unit 40 shown in fig. 4 may be provided with an external fan 52. Even when the external fan 52 is provided in the above embodiment, the heat radiation efficiency can be improved.
Fig. 6 is a schematic cross-sectional view of a vehicle lamp 600 equipped with a cooling unit 60 according to another embodiment of the present invention. The same or corresponding components as those in the above embodiment are denoted by the same reference numerals, and overlapping description thereof is appropriately omitted.
The cooling unit 60 according to the present embodiment is different from the cooling unit 20 shown in fig. 2 in that it includes an inner fan 62 and an air duct 64 in addition to the outer heat sink 12, the peltier element 14, and the inner heat sink 22. The inner fan 62 is a centrifugal fan, and sucks air in the lamp chamber 106 and blows air through the air outlet 62 a. An air duct 64 is connected to the exhaust port 62 a. The air duct 64 extends to guide the air from the air outlet 62a to the flat plate heat sink 120 of the lamp unit 108. The inner heat sink 22 is disposed such that the extending direction of the flat fins 22c is directed in the front-rear direction of the vehicle lamp 600.
The operation of the cooling unit 60 configured as described above will be described. In fig. 6, solid arrows indicate the flow of heat, and hollow arrows indicate the flow of air. In the present embodiment, power is also supplied to the peltier element 14 so that the upper surface is formed as the heat absorbing surface 14a and the lower surface is formed as the heat radiating surface 14 b. In the present embodiment, air in the lamp chamber 106 is sucked by the inner fan 62 and is sent to the flat plate fins 120 of the lamp unit 108 through the air duct 64. While the air flows, the heat of the air is conducted to the inner radiator 22 by heat exchange. The heat received by the inner heat sink 22 is absorbed by the heat absorbing surface 14a of the peltier element 14 and dissipated from the heat dissipating surface 14 b. The heat radiated from the heat radiation surface 14b of the peltier element 14 is conducted to the base portion 12a of the outer heat sink 12, and radiated from the flat plate heat radiation fins 12c to the outside of the lamp chamber 106.
As described above, even when the cooling unit 60 according to the present embodiment is applied to the vehicle lamp 600, the temperature in the lamp chamber 106 can be forcibly cooled. As a result, the electronic device having a heat-resistant temperature not too high can be also disposed in the lamp chamber 106.
In the present embodiment, the air cooled by the heat exchange is blown by the inner fan 62 to the flat fins 120 of the lamp unit 108 through the air duct 64. This allows the flat plate fins 120 to be cooled, and therefore, the heat radiation efficiency of the lamp unit 108 can be improved.
In the present embodiment, the air cooled by the heat exchange is blown to the flat plate fins 120 of the lamp unit 108, but the cooled air may be blown to another device disposed in the lamp room 106.
The cooling unit 10 shown in fig. 1 and the cooling unit 50 shown in fig. 5 may be provided with an inner fan 62. Even when the inner fan 62 is provided in the above embodiment, the heat radiation efficiency can be improved.
Fig. 7 is a schematic cross-sectional view of a vehicle lamp 700 equipped with a cooling unit 70 according to another embodiment of the present invention. The same or corresponding components as those in the above embodiment are denoted by the same reference numerals, and overlapping description thereof is appropriately omitted.
Like the cooling unit 20 shown in fig. 2, the cooling unit 70 according to the present embodiment includes the outer heat sink 12, the peltier element 14 disposed on the base portion 12a of the outer heat sink 12, and the inner heat sink 22 disposed on the peltier element 14. As shown in fig. 7, a heat conductive sheet 71 may be disposed between the base portion 22a of the inner heat sink 22 and the heat absorbing surface 14a of the peltier element 14. Further, the thermal conductive sheet 72 may be disposed between the base portion 12a of the outer heat sink 12 and the heat radiation surface 14b of the peltier element 14.
The cooling unit 70 according to the present embodiment further includes a moisture absorbent 73. The moisture absorber 73 absorbs moisture from condensed water generated in the lamp chamber 106. As the moisture absorbent 73, for example, a member made of zeolite can be used, but the present invention is not limited thereto.
The moisture absorber 73 is disposed on the peripheral edge portion of the surface (i.e., the upper surface 22b) of the inner heat sink 22 opposite to the surface (i.e., the lower surface 22d) of the peltier element 14. As shown in fig. 7, the absorbent 73 is preferably disposed so as to surround the plurality of flat fins 22 c. The absorbent 73 may be disposed on the upper surface 22b of the base portion 22a, or a groove may be provided in the upper surface 22b, and the absorbent 73 may be disposed in the groove. The groove may be disposed on the peripheral edge of the upper surface 22 b.
The operation of the cooling unit 70 configured as described above will be described. In the present embodiment, power is also supplied to the peltier element 14 so that the upper surface is formed as the heat absorbing surface 14a and the lower surface is formed as the heat radiating surface 14 b. The inner heat sink 22 receives heat from the air in the lamp chamber 106 and conducts the heat to the heat absorbing surface 14a of the peltier element 14. The peltier element 14 absorbs heat from the inner heat sink 22 through the heat absorbing surface 14a and radiates the heat from the heat radiating surface 14 b. The heat radiated from the heat radiation surface 14b of the peltier element 14 is conducted to the base portion 12a of the outer heat sink 12, and radiated from the flat plate heat radiation fins 12c to the outside of the lamp chamber 106.
Here, since the temperature of the inner heat sink 22 is lower than the air in the lamp chamber 106, there is a possibility that condensed water is generated on the surface of the inner heat sink 22 (particularly, the surface of the flat plate fins 22 c). In the present embodiment, since the moisture absorber 73 absorbs moisture from the condensed water, it is possible to prevent the liquid droplets from coming into contact with the peltier element 14. This is preferred in order to make the peltier element 14 work ideally. Further, by disposing the moisture absorbent 73 on the peripheral edge portion of the upper surface 22b, it is possible to prevent liquid droplets from dropping downward from the upper surface 22 b.
Fig. 8 is a schematic cross-sectional view of a vehicle lamp 800 equipped with a cooling unit 80 according to another embodiment of the present invention. The same or corresponding components as those in the above embodiment are denoted by the same reference numerals, and overlapping description thereof is appropriately omitted.
Like the cooling unit 40 shown in fig. 4, the cooling unit 80 according to the present embodiment includes the outer heat sink 12, the peltier element 14 disposed on the base portion 12a of the outer heat sink 12, the inner heat sink 22 disposed on the peltier element 14, and the inner fan 32 disposed to blow air in the lamp chamber 106 toward the inner heat sink 22. As shown in fig. 8, a heat conductive sheet 71 may be disposed between the base portion 22a of the inner heat sink 22 and the heat absorbing surface 14a of the peltier element 14. Further, the thermal conductive sheet 72 may be disposed between the base portion 12a of the outer heat sink 12 and the heat radiation surface 14b of the peltier element 14.
The cooling unit 70 according to the present embodiment further includes a heat insulating member 82 that blocks heat conduction between the outer radiator 12 and the inner radiator 22. The heat insulating member 82 is a resin spacer disposed between the outer heat sink 12 and the inner heat sink 22, and is formed to surround the periphery of the peltier element 14. As shown in fig. 8, the inner fan 32, the inner radiator 22, the heat insulating member 82, and the outer radiator 12 are fastened together by screws 84.
The operation of the cooling unit 80 configured as described above will be described. In the present embodiment, power is also supplied to the peltier element 14 so that the upper surface is formed as the heat absorbing surface 14a and the lower surface is formed as the heat radiating surface 14 b. The air in the lamp room 106 is blown to the inside heat sink 22 by the inside fan 32. The inner heat sink 22 receives heat of air blown by the inner fan 32 and conducts the heat to the heat absorbing surface 14a of the peltier element 14. The peltier element 14 absorbs heat from the inner heat sink 22 through the heat absorbing surface 14a and radiates the heat from the heat radiating surface 14 b. The heat radiated from the heat radiation surface 14b of the peltier element 14 is conducted to the base portion 12a of the outer heat sink 12, and radiated from the flat plate heat radiation fins 12c to the outside of the lamp chamber 106.
Here, in the present embodiment, the heat conduction between the outer radiator 12 and the inner radiator 22 can be blocked by the heat insulating member 82. This makes it possible to desirably insulate the heat absorbing surface 14a and the heat radiating surface 14b of the peltier element 14 from each other, and thus, the heat radiation efficiency can be improved.
The present invention has been described above based on the embodiments. The above embodiments are examples, and various modifications can be made by combining the respective constituent elements and the respective processing steps, and such modifications also fall within the scope of the present invention, which can be understood by those skilled in the art. For example, the cooling unit may be disposed not on the bottom surface of the lamp body but on the upper surface, the rear surface, and the side surfaces of the lamp body. Further, a plurality of cooling units may be disposed in the lamp.
In the above-described embodiment, power is supplied to the peltier element such that the surface inside the lamp chamber of the peltier element is formed as a heat absorbing surface, and the surface outside the lamp chamber of the peltier element is formed as a heat dissipating surface. However, when the temperature inside the lamp chamber is lower than the temperature outside the lamp chamber and the temperature inside the lamp chamber needs to be raised, for example, to normally operate the laser light source, the direction of the current flowing through the peltier element may be reversed, the surface inside the lamp chamber of the peltier element may be set as the heat radiation surface, and the surface outside the lamp chamber of the peltier element may be set as the heat absorption surface.
In the above, the case where the cooling unit is applied to the vehicle lamp has been described, but the cooling unit according to the embodiment of the present invention can cool not only the vehicle lamp but also the temperature of the internal space of any of the cases.
Claims (10)
1. A cooling unit for cooling the temperature of the inner space of a housing,
it is characterized in that the preparation method is characterized in that,
the cooling unit is provided with:
an outer heat sink partially exposed to the outside of the housing; and
and a peltier element having a heat absorbing surface that absorbs heat from the internal space of the housing and a heat radiating surface that radiates the heat absorbed by the heat absorbing surface to the outer heat sink.
2. The cooling unit of claim 1,
the cooling unit further includes an inner heat sink that receives heat from the internal space of the housing and conducts the heat to the heat absorbing surface of the peltier element.
3. The cooling unit of claim 2,
the cooling unit further includes a heat insulating member that blocks heat conduction between the outer radiator and the inner radiator.
4. The cooling unit of claim 2,
a thermally conductive sheet is disposed between the base portion of the inner heat sink and the heat absorbing surface of the peltier element, and/or a thermally conductive sheet is disposed between the base portion of the outer heat sink and the heat dissipating surface of the peltier element.
5. The cooling unit of any one of claims 1 to 4,
the cooling unit further includes an inner fan that blows air in the internal space of the housing toward the heat absorbing surface of the peltier element.
6. The cooling unit of any one of claims 1 to 4,
the cooling unit further includes an inner fan that sucks air in the internal space of the casing and blows the air in a predetermined direction.
7. The cooling unit of any one of claims 1 to 4,
the cooling unit further includes an outer fan that blows air outside the housing toward an exposed portion of the outer heat sink.
8. The cooling unit of any one of claims 1 to 4,
the cooling unit further includes a moisture absorber that absorbs moisture from condensed water generated in the internal space of the casing.
9. The cooling unit of claim 8,
the moisture absorber is disposed on a peripheral portion of a surface of the inner heat sink opposite to the surface on the peltier element side.
10. A vehicle lamp in which a lamp unit is housed in a lamp body formed by an outer lens and a lamp body,
it is characterized in that the preparation method is characterized in that,
the vehicle lamp includes the cooling unit according to any one of claims 1 to 9 that cools the temperature inside the lamp body.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018-022179 | 2018-02-09 | ||
| JP2018022179 | 2018-02-09 | ||
| JP2018-218574 | 2018-11-21 | ||
| JP2018218574 | 2018-11-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209909794U true CN209909794U (en) | 2020-01-07 |
Family
ID=67548995
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910095976.4A Pending CN110131675A (en) | 2018-02-09 | 2019-01-31 | Cooling unit and lamps apparatus for vehicle |
| CN201920173695.1U Active CN209909794U (en) | 2018-02-09 | 2019-01-31 | Cooling unit and vehicle lamp |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910095976.4A Pending CN110131675A (en) | 2018-02-09 | 2019-01-31 | Cooling unit and lamps apparatus for vehicle |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPWO2019156088A1 (en) |
| CN (2) | CN110131675A (en) |
| WO (1) | WO2019156088A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110131675A (en) * | 2018-02-09 | 2019-08-16 | 株式会社小糸制作所 | Cooling unit and lamps apparatus for vehicle |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111503535B (en) * | 2020-05-18 | 2021-10-26 | 江苏佳强照明电器有限公司 | Constant-current stable lamp wick for LED lamp |
| DE102022001240A1 (en) * | 2022-04-12 | 2023-10-12 | Mercedes-Benz Group AG | Temperature control module and headlights |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004095526A (en) * | 2002-07-11 | 2004-03-25 | Honda Motor Co Ltd | Defogger for vehicle headlight |
| JP4775249B2 (en) * | 2006-12-22 | 2011-09-21 | トヨタ自動車株式会社 | Vehicle lighting |
| FR2913751A1 (en) * | 2007-03-15 | 2008-09-19 | Valeo Vision Sa | LIGHTING AND / OR SIGNALING DEVICE FOR A MOTOR VEHICLE COMPRISING AN EXTERNAL WALL HAVING A THERMAL LIGHTING AREA. |
| JP4992111B2 (en) * | 2007-09-20 | 2012-08-08 | 株式会社小糸製作所 | Vehicle lighting |
| DE102007057056A1 (en) * | 2007-11-27 | 2009-05-28 | Hella Kgaa Hueck & Co. | Headlight for motor vehicle, has thermoelectric radiator arranged on housing, where heat exchange takes place between internal space and outer side of housing through thermoelectric radiator |
| JP2012003847A (en) * | 2010-06-14 | 2012-01-05 | Stanley Electric Co Ltd | Vehicular lighting fixture |
| DE102012205435A1 (en) * | 2012-04-03 | 2013-10-10 | Bayerische Motoren Werke Aktiengesellschaft | Lighting device for a motor vehicle |
| JP6120496B2 (en) * | 2012-06-15 | 2017-04-26 | 三菱電機株式会社 | Light source device |
| KR101786198B1 (en) * | 2015-09-10 | 2017-10-18 | 현대자동차주식회사 | Dehumidifier of lamp for vehicle |
| CN106016124A (en) * | 2016-06-28 | 2016-10-12 | 安徽蓝锐电子科技有限公司 | Refrigerating mechanism used for cooling of interior of vehicle headlamp assembly |
| FR3058503B1 (en) * | 2016-11-09 | 2019-01-25 | Valeo Vision | LIGHT DEVICE EQUIPPED WITH AT LEAST ONE PELTIER ELEMENT |
| CN110131675A (en) * | 2018-02-09 | 2019-08-16 | 株式会社小糸制作所 | Cooling unit and lamps apparatus for vehicle |
-
2019
- 2019-01-31 CN CN201910095976.4A patent/CN110131675A/en active Pending
- 2019-01-31 CN CN201920173695.1U patent/CN209909794U/en active Active
- 2019-02-05 JP JP2019570759A patent/JPWO2019156088A1/en active Pending
- 2019-02-05 WO PCT/JP2019/004102 patent/WO2019156088A1/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110131675A (en) * | 2018-02-09 | 2019-08-16 | 株式会社小糸制作所 | Cooling unit and lamps apparatus for vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2019156088A1 (en) | 2021-01-28 |
| CN110131675A (en) | 2019-08-16 |
| WO2019156088A1 (en) | 2019-08-15 |
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