WO2019156088A1 - Cooling unit and vehicle lamp - Google Patents

Cooling unit and vehicle lamp Download PDF

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Publication number
WO2019156088A1
WO2019156088A1 PCT/JP2019/004102 JP2019004102W WO2019156088A1 WO 2019156088 A1 WO2019156088 A1 WO 2019156088A1 JP 2019004102 W JP2019004102 W JP 2019004102W WO 2019156088 A1 WO2019156088 A1 WO 2019156088A1
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WO
WIPO (PCT)
Prior art keywords
heat
cooling unit
lamp
heat sink
peltier element
Prior art date
Application number
PCT/JP2019/004102
Other languages
French (fr)
Japanese (ja)
Inventor
井上　貴司
高志 伊藤
Original Assignee
株式会社小糸製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社小糸製作所 filed Critical 株式会社小糸製作所
Priority to JP2019570759A priority Critical patent/JPWO2019156088A1/en
Publication of WO2019156088A1 publication Critical patent/WO2019156088A1/en

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Classifications

    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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]

Definitions

  • the present invention relates to a cooling unit and a vehicular lamp using the cooling unit.
  • a vehicular lamp using a semiconductor light emitting element such as an LED (Light Emitting Diode) as a light source is known.
  • a semiconductor light emitting element such as an LED (Light Emitting Diode)
  • a semiconductor light emitting device generates heat when a large current is supplied to obtain a high output.
  • the device becomes hot due to heat generation, the light emission efficiency decreases.
  • various heat dissipation structures for vehicle lamps have been proposed in order to efficiently dissipate heat from the semiconductor light emitting element (see, for example, Patent Document 1).
  • the present invention has been made in view of such 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.
  • a cooling unit is a cooling unit that cools the temperature of the internal space of the housing, and is disposed outside such that a part thereof is exposed to the outside of the housing.
  • a Peltier element having a heat sink, a heat absorption surface that absorbs heat from the internal space of the housing, and a heat dissipation surface that dissipates heat absorbed by the heat absorption surface to the outer heat sink.
  • An inner heat sink that receives heat from the internal space of the housing and transfers heat to the heat absorbing surface of the Peltier element may be further provided.
  • a heat insulating member that blocks heat transfer between the outer heat sink and the inner heat sink may be further provided.
  • An inner fan that blows air in the internal space of the housing toward the heat absorbing surface of the Peltier element may be further provided.
  • An inner fan that sucks air in the internal space of the housing and blows air in a predetermined direction may be further provided.
  • An outside fan that blows air outside the housing toward the outside exposed portion of the outside heat sink may be further provided.
  • a moisture absorber that absorbs moisture generated in the internal space of the housing may be further provided.
  • the moisture absorber may be disposed on the peripheral edge of the surface opposite to the surface on the Peltier element side of the inner heat sink.
  • Another aspect of the present invention is a vehicular lamp in which a lamp unit is housed in a lamp body that includes an outer lens and a lamp body.
  • This vehicular lamp includes the above-described cooling unit that cools the temperature inside the lamp body.
  • the present invention it is possible 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.
  • This cooling unit can cool the temperature of the internal space of the sealed casing.
  • a cooling unit can cool the temperature of the internal space of the sealed casing.
  • directions such as “up”, “down”, “front”, “back”, “left”, “right”, “inside”, “outside”, etc. are used, It means the direction in the posture when the vehicular lamp is mounted on the vehicle.
  • FIG. 1 is a schematic sectional view of a vehicular lamp 100 equipped with a cooling unit 10 according to an embodiment of the present invention.
  • a vehicular lamp 100 includes a resin lamp body 102 whose front surface is open, and an outer lens 104 that is formed of a light-transmitting material and covers the front surface of the lamp body 102 in an airtight manner.
  • a lamp unit 108 using a semiconductor light emitting element as a light source is accommodated in the lamp chamber 106 configured.
  • the lamp unit 108 is a so-called projector-type lamp unit, and uses an LED as a light source.
  • 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 LED 110, a reflector 114, a support member 116, and a projection lens 118.
  • the LED 110 is a white LED in which the LED chip 113 is mounted on the circuit board 112.
  • the LED 110 is provided so as to be positioned on the optical axis Ax in a state in which the light emission direction is directed in a direction perpendicular to the optical axis Ax of the lamp unit 108.
  • the LED 110 is supplied with power through a wiring pattern formed on the circuit board 112.
  • the reflector 114 is formed in a semi-dome shape using, for example, polycarbonate, and is disposed above the LED 110.
  • the reflector 114 has, on its inner surface, a reflecting surface that condenses and reflects the light from the LED 110 forward and toward the optical axis Ax.
  • the projection lens 118 is a plano-convex aspheric lens having a convex front surface and a flat rear surface, and irradiates the light source image formed on the rear focal plane forward as a reverse image.
  • the support member 116 is formed by die-casting using a metal whose main component is aluminum, and a reflector 114 having a reflective surface based on an ellipse curved surface is fixed to the upper surface of the support member 116.
  • a plurality of flat fins 120 are erected in parallel at predetermined intervals at the rear side end of the support member 116.
  • the plate fins 120 are formed such that the extending direction faces the vertical direction.
  • the extending direction of the flat plate fin 120 is the longitudinal direction of the flat plate fin 120.
  • the flat fin 120 radiates heat generated from the LED 110 to the air in the lamp chamber 106.
  • the lamp unit 108 is tiltably attached to the lamp body 102 by a support member (not shown) so that the light emitted from the lamp unit 108 is irradiated in front of the vehicular lamp 100.
  • 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.
  • 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.
  • the cooling unit 10 is attached to the lower surface 102a of the lamp body 102.
  • the cooling unit 10 may be provided on the rear surface 102b or 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 mounted on the lower surface 102a so as to close the hole 102d.
  • the outer heat sink 12 includes a base portion 12a and a plurality of flat plate fins 12c erected on the lower surface 12b of the base portion 12a.
  • the outer heat sink 12 is fixed to the lower surface 102 a of the lamp body 102 so that the flat fins 12 c are exposed to the outside of the lamp chamber 106.
  • the outer heat sink 12 is fixed to the lower surface 102a of the lamp body 102 with screws 13, but the fixing method is not particularly limited.
  • the upper surface 12 d of the base portion 12 a of the outer heat sink 12 faces the internal space of the lamp chamber 106 through the hole 102 d of the lamp body 102.
  • the Peltier element 14 is disposed on the upper surface 12 d of the base portion 12 a of the outer heat sink 12.
  • the Peltier element 14 is a plate-like semiconductor element that moves heat from one surface to the other surface by passing an electric current.
  • the Peltier element 14 has a heat absorbing surface and a heat radiating surface depending on the direction of current flow.
  • the upper surface of the Peltier element 14 facing the lamp chamber 106 is a heat absorbing surface 14 a that absorbs heat from the internal space of the lamp chamber 106, and the Peltier element 14 facing the upper surface 12 d of the base portion 12 a of the outer heat sink 12.
  • An electric current is supplied to the Peltier element 14 so that the lower surface becomes the heat radiating surface 14 b that radiates the heat absorbed by the heat absorbing surface 14 a to the outer heat sink 12.
  • the heat dissipation surface 14b of the Peltier element 14 may abut against the upper surface 12d of the base portion 12a, or a heat conductive sheet or the like may be interposed between the heat dissipation surface 14b of the Peltier element 14 and the upper surface 12d of the base portion 12a. Good.
  • a solid line arrow represents a heat flow.
  • the Peltier element 14 absorbs heat from the air in the lamp chamber 106 through the heat absorbing surface 14a, and radiates the heat. Heat is radiated from the surface 14b.
  • the heat radiated from the heat radiating surface 14 b of the Peltier element 14 is transferred to the base portion 12 a of the outer heat sink 12, and is radiated from the flat fin 12 c to the outside of the lamp chamber 106.
  • the temperature in the lamp chamber 106 can be forcibly cooled.
  • electronic devices such as cameras, various sensors, and DMD (Digital Mirror Device) may be provided in the lamp chamber, but these electronic devices may not have a high heat-resistant temperature. There is sex.
  • the temperature in the lamp chamber 106 tends to become high due to the heat generated from the LED 110 of the lamp unit 108 or the heat generated by the electronic device or the like, but by reducing the temperature in the lamp chamber 106 using the cooling unit 10, Even an electronic device whose heat-resistant temperature is not so high can be arranged in the lamp chamber 106.
  • FIG. 2 is a schematic sectional view of a vehicular lamp 200 equipped with a cooling unit 20 according to another embodiment of the present invention. Constituent elements that are the same as or correspond to those in the above-described embodiment are given the same reference numerals, and redundant descriptions are omitted as appropriate.
  • the cooling unit 20 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 flat plate fins 22c erected on the upper surface 22b of the base portion 22a.
  • the inner heat sink 22 is disposed on the Peltier element 14 so that the lower surface 22d of the base portion 22a contacts the heat absorbing surface 14a of the Peltier element 14.
  • a thermally 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 solid line arrow represents the flow of heat.
  • a current is supplied to the Peltier element 14 so that the upper surface is the heat absorbing surface 14a and the lower surface is the heat radiating surface 14b.
  • the inner heat sink 22 newly provided in the present embodiment receives heat from the air in the lamp chamber 106 and transfers heat to the heat absorbing surface 14 a of the Peltier element 14.
  • the Peltier element 14 absorbs heat from the inner heat sink 22 at the heat absorbing surface 14a and radiates the heat from the heat radiating surface 14b.
  • the heat radiated from the heat radiating surface 14 b of the Peltier element 14 is transferred to the base portion 12 a of the outer heat sink 12, and is radiated from the flat fin 12 c to the outside of the lamp chamber 106.
  • the cooling unit 20 according to the present embodiment is applied to the vehicular lamp 200, the temperature in the lamp chamber 106 can be forcibly cooled. As a result, even an electronic device whose heat-resistant temperature is not so high can be arranged in the lamp chamber 106.
  • FIG. 3 is a schematic cross-sectional view of a vehicular lamp 300 equipped with a cooling unit 30 according to still another embodiment of the present invention. Constituent elements that are the same as or correspond to those in the above-described embodiment are given the same reference numerals, and redundant descriptions are omitted as appropriate.
  • the cooling unit 30 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 exhausts air sucked from the axial direction in the axial direction.
  • the inner fan 32 is arranged so as to blow the air in the lamp chamber 106 toward the heat absorbing surface 14 a of the Peltier element 14.
  • the inner fan 32 is supported above the Peltier element 14 by a support member (not shown).
  • a solid line arrow represents a heat flow
  • a white arrow represents an air flow.
  • a current is supplied to the Peltier element 14 so that the upper surface is the heat absorbing surface 14a and the lower surface is the heat radiating surface 14b.
  • the air in the lamp chamber 106 is blown onto the heat absorbing surface 14 a of the Peltier element 14 by the inner fan 32.
  • the Peltier element 14 absorbs heat from the air blown by the heat absorbing surface 14a, and radiates the heat from the heat radiating surface 14b.
  • the heat radiated from the heat radiating surface 14 b of the Peltier element 14 is transferred to the base portion 12 a of the outer heat sink 12, and is radiated from the flat fin 12 c to the outside of the lamp chamber 106.
  • the cooling unit 30 according to the present embodiment is applied to the vehicular lamp 300, the temperature in the lamp chamber 106 can be forcibly cooled. As a result, even an electronic device whose heat-resistant temperature is not so high can be arranged in the lamp chamber 106.
  • the air blown to the Peltier element 14 by the inner fan 32 is cooled by heat exchange. Since this cooled air flows into the lamp chamber 106 along the inner surface of the outer lens 104 and the lamp body 102, a wide range of the lamp chamber 106 can be cooled.
  • FIG. 4 is a schematic cross-sectional view of a vehicular lamp 400 equipped with a cooling unit 40 according to still another embodiment of the present invention. Constituent elements that are the same as or correspond to those in the above-described embodiment are given the same reference numerals, and redundant descriptions are omitted as appropriate.
  • the cooling unit 40 according to this 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 the air in the lamp chamber 106 toward the inner heat sink 22.
  • the inner heat sink 22 is disposed so that the extending direction of the flat fins 22 c faces the front-rear direction of the vehicular lamp 400.
  • a solid line arrow represents a heat flow
  • a white arrow represents an air flow.
  • a current is supplied to the Peltier element 14 so that the upper surface is the heat absorbing surface 14a and the lower surface is the heat radiating surface 14b.
  • the air in the lamp chamber 106 is blown to the inner heat sink 22 by the inner fan 32.
  • the inner heat sink 22 receives the heat of the air blown by the inner fan 32 and transfers the heat to the heat absorbing surface 14 a of the Peltier element 14.
  • the Peltier element 14 absorbs heat from the inner heat sink 22 at the heat absorbing surface 14a and radiates the heat from the heat radiating surface 14b.
  • the heat radiated from the heat radiating surface 14 b of the Peltier element 14 is transferred to the base portion 12 a of the outer heat sink 12, and is radiated from the flat fin 12 c to the outside of the lamp chamber 106.
  • the cooling unit 40 according to the present embodiment is applied to the vehicular lamp 400, the temperature in the lamp chamber 106 can be forcibly cooled. As a result, even an electronic device whose heat-resistant temperature is not so high can be arranged in the lamp chamber 106.
  • the air blown to the inner heat sink 22 by the inner fan 32 is cooled by heat exchange. Since this cooled air flows into the lamp chamber 106 along the inner surface of the outer lens 104 and the lamp body 102, a wide range of the lamp chamber 106 can be cooled.
  • FIG. 5 is a schematic cross-sectional view of a vehicular lamp 500 equipped with a cooling unit 50 according to still another embodiment of the present invention. Constituent elements that are the same as or correspond to those in the above-described embodiment are given the same reference numerals, and redundant descriptions are omitted as appropriate.
  • the cooling unit 50 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 outer 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 an externally exposed portion of the outer heat sink 12, that is, the flat fin 12c and the lower surface 12b of the base portion 12a.
  • the outer heat sink 12 is disposed such that the extending direction of the flat fins 12 c faces the front-rear direction of the vehicular lamp 500.
  • the solid line arrow represents the flow of heat
  • the white arrow represents the flow of air.
  • a current is supplied to the Peltier element 14 so that the upper surface is the heat absorbing surface 14a and the lower surface is the heat radiating surface 14b.
  • 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 14b.
  • the heat radiated from the heat radiating surface 14 b of the Peltier element 14 is transferred to the base portion 12 a of the outer heat sink 12, and is radiated from the flat fin 12 c to the outside of the lamp chamber 106.
  • air outside the lamp chamber 106 is blown by the external fan 52 to the flat fins 12c of the outer heat sink 12, etc., so heat exchange in the outer heat sink 12 is promoted and heat dissipation efficiency is improved. Can be increased.
  • the external fan 52 may be provided for the cooling unit 20 shown in FIG. 2, the cooling unit 30 shown in FIG. 3, and the cooling unit 40 shown in FIG. Also when provided in these embodiments, the heat dissipation efficiency can be increased.
  • FIG. 6 is a schematic cross-sectional view of a vehicular lamp 600 equipped with a cooling unit 60 according to still another embodiment of the present invention. Constituent elements that are the same as or correspond to those in the above-described embodiment are given the same reference numerals, and redundant descriptions are omitted as appropriate.
  • the cooling unit 60 is different from the cooling unit 20 shown in FIG. 2 in that it includes an inner fan 62 and a 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, sucks the air in the lamp chamber 106, and blows it from the exhaust port 62a.
  • a duct 64 is connected to the exhaust port 62a. The duct 64 extends so as to guide the air from the exhaust port 62 a to the flat fin 120 of the lamp unit 108.
  • the inner heat sink 22 is disposed so that the extending direction of the flat fins 22 c faces the front-rear direction of the vehicular lamp 600.
  • a solid line arrow represents a heat flow
  • a white arrow represents an air flow.
  • a current is supplied to the Peltier element 14 so that the upper surface is the heat absorbing surface 14a and the lower surface is the heat radiating surface 14b.
  • the air in the lamp chamber 106 is sucked by the inner fan 62 and sent to the flat fins 120 of the lamp unit 108 via the duct 64.
  • heat of the air is transferred to the inner heat sink 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 radiated from the heat radiating surface 14b.
  • the heat radiated from the heat radiating surface 14 b of the Peltier element 14 is transferred to the base portion 12 a of the outer heat sink 12, and is radiated from the flat fin 12 c to the outside of the lamp chamber 106.
  • the cooling unit 60 according to the present embodiment is applied to the vehicular lamp 600, the temperature in the lamp chamber 106 can be forcibly cooled. As a result, even an electronic device whose heat-resistant temperature is not so high can be arranged in the lamp chamber 106.
  • the air cooled by heat exchange is blown to the flat fins 120 of the lamp unit 108 via the duct 64 by the inner fan 62.
  • the heat dissipation efficiency of the lamp unit 108 can be improved.
  • air cooled by heat exchange is blown to the flat fins 120 of the lamp unit 108, but the cooled air may be blown to other devices arranged in the lamp chamber 106.
  • the inner fan 62 may be provided for the cooling unit 10 shown in FIG. 1 and the cooling unit 50 shown in FIG. Also when provided in these embodiments, the heat dissipation efficiency can be increased.
  • FIG. 7 is a schematic cross-sectional view of a vehicular lamp 700 equipped with a cooling unit 70 according to still another embodiment of the present invention. Constituent elements that are the same as or correspond to those in the above-described embodiment are given the same reference numerals, and redundant descriptions are omitted as appropriate.
  • the cooling unit 70 is arranged on the outer heat sink 12, the Peltier element 14 disposed on the base portion 12 a of the outer heat sink 12, and the Peltier element 14, similarly to the cooling unit 20 illustrated in FIG. 2.
  • an inner heat sink 22 As shown in FIG. 7, a heat conductive sheet 71 may be disposed between the base portion 22 a of the inner heat sink 22 and the heat absorbing surface 14 a of the Peltier element 14. Further, a heat conductive sheet 72 may be disposed between the base portion 12 a of the outer heat sink 12 and the heat radiation surface 14 b of the Peltier element 14.
  • the cooling unit 70 further includes a moisture absorber 73.
  • the hygroscopic body 73 absorbs dew condensation generated in the lamp chamber 106.
  • the hygroscopic material 73 can be made of, for example, zeolite, but is not limited thereto.
  • the hygroscopic body 73 is disposed on the peripheral portion of the surface (that is, the upper surface 22b) opposite to the surface (that is, the lower surface 22d) on the Peltier element 14 side of the inner heat sink 22. As shown in FIG. 7, it is preferable that the hygroscopic body 73 is disposed so as to surround the plurality of flat plate fins 22c.
  • the moisture absorber 73 may be disposed on the upper surface 22b of the base portion 22a, or may be disposed in the recess by providing a recess in the upper surface 22b.
  • the depression may be disposed on the peripheral edge of the upper surface 22b.
  • a current is supplied to the Peltier element 14 so that the upper surface is the heat absorbing surface 14a and the lower surface is the heat radiating surface 14b.
  • the inner heat sink 22 receives heat from the air in the lamp chamber 106 and transfers heat to the heat absorbing surface 14 a of the Peltier element 14.
  • the Peltier element 14 absorbs heat from the inner heat sink 22 at the heat absorbing surface 14a and radiates the heat from the heat radiating surface 14b.
  • the heat radiated from the heat radiating surface 14 b of the Peltier element 14 is transferred to the base portion 12 a of the outer heat sink 12, and is radiated from the flat fin 12 c to the outside of the lamp chamber 106.
  • the inner heat sink 22 has a lower temperature than the air in the lamp chamber 106, condensation may occur on the surface of the inner heat sink 22 (particularly the surface of the flat fin 22c).
  • this dew condensation can be absorbed by the moisture absorber 73, it is possible to prevent a situation where the droplet contacts the Peltier element 14. This is desirable for operating the Peltier element 14 suitably.
  • the hygroscopic body 73 on the peripheral portion of the upper surface 22b, it is possible to prevent the liquid droplet from dripping downward from the upper surface 22b.
  • FIG. 8 is a schematic cross-sectional view of a vehicular lamp 800 equipped with a cooling unit 80 according to still another embodiment of the present invention. Constituent elements that are the same as or correspond to those in the above-described embodiment are given the same reference numerals, and redundant descriptions are omitted as appropriate.
  • the cooling unit 80 is disposed on the outer heat sink 12, the Peltier element 14 disposed on the base portion 12 a of the outer heat sink 12, and the Peltier element 14, similarly to the cooling unit 40 illustrated in FIG. 4.
  • the inner heat sink 22 and the inner fan 32 arranged to blow the air in the lamp chamber 106 toward the inner heat sink 22.
  • a heat conductive sheet 71 may be disposed between the base portion 22 a of the inner heat sink 22 and the heat absorbing surface 14 a of the Peltier element 14.
  • a heat conductive sheet 72 may be disposed between the base portion 12 a of the outer heat sink 12 and the heat radiation surface 14 b of the Peltier element 14.
  • the cooling unit 70 further includes a heat insulating member 82 that blocks heat transfer between the outer heat sink 12 and the inner heat sink 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 so as to surround the periphery of the Peltier element 14. As shown in FIG. 8, the inner fan 32, the inner heat sink 22, the heat insulating member 82, and the outer heat sink 12 are fastened together with screws 84.
  • a current is supplied to the Peltier element 14 so that the upper surface is the heat absorbing surface 14a and the lower surface is the heat radiating surface 14b.
  • the air in the lamp chamber 106 is blown onto the inner heat sink 22 by the inner fan 32.
  • the inner heat sink 22 receives the heat of the air blown by the inner fan 32 and transfers the heat to the heat absorbing surface 14 a of the Peltier element 14.
  • the Peltier element 14 absorbs heat from the inner heat sink 22 at the heat absorbing surface 14a and radiates the heat from the heat radiating surface 14b.
  • the heat radiated from the heat radiating surface 14 b of the Peltier element 14 is transferred to the base portion 12 a of the outer heat sink 12, and is radiated from the flat fin 12 c to the outside of the lamp chamber 106.
  • the heat transfer between the outer heat sink 12 and the inner heat sink 22 can be blocked by the heat insulating member 82.
  • the heat absorption surface 14a and the heat radiating surface 14b of the Peltier element 14 can be suitably insulated, heat radiation efficiency can be improved.
  • the cooling unit may be disposed not on the bottom surface of the lamp body but on the top surface, the back surface, and the side surface of the lamp body.
  • a plurality of cooling units may be arranged in the lamp.
  • a current is supplied to the Peltier element so that the surface inside the lamp chamber of the Peltier element becomes a heat absorbing surface and the surface outside the lamp chamber of the Peltier element becomes a heat radiating surface.
  • the temperature inside the lamp chamber is lower than the temperature outside the lamp chamber, for example, when it is necessary to increase the temperature in the lamp chamber in order to operate the laser light source normally, the direction of the current flowing through the Peltier element is reversed,
  • the surface inside the lamp chamber of the element may be a heat radiating surface, and the surface outside the lamp chamber of the Peltier device may be a heat absorbing surface.
  • the cooling unit can cool not only the vehicular lamp but also the temperature of the internal space of an arbitrary housing. it can.
  • the present invention can be used for a vehicular lamp.

Abstract

Provided is a cooling unit 10 that cools the internal temperature of a lamp chamber 106. The cooling unit 10 comprises: an outer heat sink 12 that is arranged such that flat fins 12c are exposed to the outside of the lamp chamber 106; and a Peltier element 14 that has a heat-absorbing surface 14a that absorbs heat from the air in the lamp chamber 106 and a heat-radiating surface 14b that radiates heat that is absorbed by the heat-absorbing surface 14a to the outer heat sink 12.

Description

冷却ユニットおよび車両用灯具Cooling unit and vehicle lamp
　本発明は、冷却ユニットおよび該冷却ユニットを用いた車両用灯具に関する。 The present invention relates to a cooling unit and a vehicular lamp using the cooling unit.
　従来、ＬＥＤ（Ｌｉｇｈｔ　Ｅｍｉｔｔｉｎｇ　Ｄｉｏｄｅ）等の半導体発光素子を光源として使用した車両用灯具が知られている。車両用灯具の光源として半導体発光素子を用いる場合、半導体発光素子の発光を最大限利用することにより、車両用灯具に要求される光量レベルを満足する必要がある。 Conventionally, a vehicular lamp using a semiconductor light emitting element such as an LED (Light Emitting Diode) as a light source is known. When a semiconductor light emitting element is used as a light source of a vehicular lamp, it is necessary to satisfy a light quantity level required for the vehicular lamp by making maximum use of light emitted from the semiconductor light emitting element.
　一般に、半導体発光素子は、高出力を得るために大きな電流を供給すると発熱が増えるが、発熱によって素子が高温になると発光効率が低下する。そのため、半導体発光素子からの熱を効率良く放熱するために、種々の車両用灯具の放熱構造が提案されている（たとえば特許文献１参照）。 Generally, a semiconductor light emitting device generates heat when a large current is supplied to obtain a high output. However, if the device becomes hot due to heat generation, the light emission efficiency decreases. For this reason, various heat dissipation structures for vehicle lamps have been proposed in order to efficiently dissipate heat from the semiconductor light emitting element (see, for example, Patent Document 1).
特開２００６－２８６３９５号公報JP 2006-286395 A
　従来、半導体発光素子からの熱を放熱する技術は多く提案されているが、車両用灯具の灯室内には半導体発光素子の他にも耐熱温度が低いデバイスが配置される可能性がある。従って、車両用灯具の灯室内の温度を冷却できることが望ましい。 Conventionally, many techniques for dissipating heat from a semiconductor light emitting element have been proposed, but there is a possibility that a device having a low heat-resistant temperature may be disposed in the lamp chamber of a vehicle lamp in addition to the semiconductor light emitting element. Therefore, it is desirable to be able to cool the temperature in the lamp chamber of the vehicular lamp.
　本発明はこうした状況に鑑みてなされたものであり、その目的は、筐体の内部空間の温度を冷却できる冷却ユニットおよび該冷却ユニットを用いた車両用灯具を提供することにある。 The present invention has been made in view of such 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.
　上記課題を解決するために、本発明のある態様の冷却ユニットは、筐体の内部空間の温度を冷却する冷却ユニットであって、一部が筐体の外部に露出するように配置される外側ヒートシンクと、筐体の内部空間から熱を吸熱する吸熱面と、吸熱面で吸熱した熱を外側ヒートシンクに放熱する放熱面とを有するペルチェ素子と、を備える。 In order to solve the above-described problem, a cooling unit according to an aspect of the present invention is a cooling unit that cools the temperature of the internal space of the housing, and is disposed outside such that a part thereof is exposed to the outside of the housing. And a Peltier element having a heat sink, a heat absorption surface that absorbs heat from the internal space of the housing, and a heat dissipation surface that dissipates heat absorbed by the heat absorption surface to the outer heat sink.
　筐体の内部空間の熱を受けてペルチェ素子の吸熱面に伝熱する内側ヒートシンクをさらに備えてもよい。 An inner heat sink that receives heat from the internal space of the housing and transfers heat to the heat absorbing surface of the Peltier element may be further provided.
　外側ヒートシンクと内側ヒートシンクとの間の伝熱を遮断する断熱部材をさらに備えてもよい。 A heat insulating member that blocks heat transfer between the outer heat sink and the inner heat sink may be further provided.
　ペルチェ素子の吸熱面に向かって筐体の内部空間の空気を送風する内側ファンをさらに備えてもよい。 An inner fan that blows air in the internal space of the housing toward the heat absorbing surface of the Peltier element may be further provided.
　筐体の内部空間の空気を吸い込み、所定の方向に送風する内側ファンをさらに備えてもよい。 An inner fan that sucks air in the internal space of the housing and blows air in a predetermined direction may be further provided.
　筐体の外部の空気を外側ヒートシンクの外部露出部に向かって送風する外側ファンをさらに備えてもよい。 An outside fan that blows air outside the housing toward the outside exposed portion of the outside heat sink may be further provided.
　筐体の内部空間で生じた結露を吸湿する吸湿体をさらに備えてもよい。 A moisture absorber that absorbs moisture generated in the internal space of the housing may be further provided.
　吸湿体は、内側ヒートシンクにおけるペルチェ素子側の面と反対側の面の周縁部に配置されてもよい。 The moisture absorber may be disposed on the peripheral edge of the surface opposite to the surface on the Peltier element side of the inner heat sink.
　本発明の別の態様は、アウターレンズとランプボディとを含んで形成される灯体内部に灯具ユニットが収容される車両用灯具である。この車両用灯具は、灯体内部の温度を冷却する上述の冷却ユニットを備える。 Another aspect of the present invention is a vehicular lamp in which a lamp unit is housed in a lamp body that includes an outer lens and a lamp body. This vehicular lamp includes the above-described cooling unit that cools the temperature inside the lamp body.
　本発明によれば、筐体の内部空間の温度を冷却できる冷却ユニットおよび該冷却ユニットを用いた車両用灯具を提供できる。 According to the present invention, it is possible 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.
本発明の実施形態に係る冷却ユニットが装着された車両用灯具の概略断面図である。It is a schematic sectional drawing of the vehicle lamp with which the cooling unit which concerns on embodiment of this invention was mounted | worn. 本発明の別の実施形態に係る冷却ユニットが装着された車両用灯具の概略断面図である。It is a schematic sectional drawing of the vehicle lamp with which the cooling unit which concerns on another embodiment of this invention was mounted | worn. 本発明のさらに別の実施形態に係る冷却ユニットが装着された車両用灯具の概略断面図である。It is a schematic sectional drawing of the vehicle lamp with which the cooling unit which concerns on another embodiment of this invention was mounted | worn. 本発明のさらに別の実施形態に係る冷却ユニットが装着された車両用灯具の概略断面図である。It is a schematic sectional drawing of the vehicle lamp with which the cooling unit which concerns on another embodiment of this invention was mounted | worn. 本発明のさらに別の実施形態に係る冷却ユニットが装着された車両用灯具の概略断面図である。It is a schematic sectional drawing of the vehicle lamp with which the cooling unit which concerns on another embodiment of this invention was mounted | worn. 本発明のさらに別の実施形態に係る冷却ユニットが装着された車両用灯具の概略断面図である。It is a schematic sectional drawing of the vehicle lamp with which the cooling unit which concerns on another embodiment of this invention was mounted | worn. 本発明のさらに別の実施形態に係る冷却ユニットが装着された車両用灯具の概略断面図である。It is a schematic sectional drawing of the vehicle lamp with which the cooling unit which concerns on another embodiment of this invention was mounted | worn. 本発明のさらに別の実施形態に係る冷却ユニットが装着された車両用灯具の概略断面図である。It is a schematic sectional drawing of the vehicle lamp with which the cooling unit which concerns on another embodiment of this invention was mounted | worn.
　以下、図面を参照して本発明の実施形態に係る冷却ユニットについて詳細に説明する。この冷却ユニットは、密閉された筐体の内部空間の温度を冷却可能である。以下の説明においては、冷却ユニットを車両用灯具に適用した場合について説明する。なお、本明細書において「上」、「下」、「前」、「後」、「左」、「右」、「内」、「外」等の方向を表す用語が用いられる場合、それらは車両用灯具が車両に装着されたときの姿勢における方向を意味する。 Hereinafter, a cooling unit according to an embodiment of the present invention will be described in detail with reference to the drawings. This cooling unit can cool the temperature of the internal space of the sealed casing. In the following description, a case where the cooling unit is applied to a vehicle lamp will be described. In the present specification, when terms indicating directions such as “up”, “down”, “front”, “back”, “left”, “right”, “inside”, “outside”, etc. are used, It means the direction in the posture when the vehicular lamp is mounted on the vehicle.
　図１は、本発明の実施形態に係る冷却ユニット１０が装着された車両用灯具１００の概略断面図である。図１に示すように、車両用灯具１００は、前面が開放した樹脂製のランプボディ１０２と、透光性材料により形成され、ランプボディ１０２の前面を気密的に覆うアウターレンズ１０４とを含んで構成された灯室１０６内に、半導体発光素子を光源とする灯具ユニット１０８が収容された構成となっている。 FIG. 1 is a schematic sectional view of a vehicular lamp 100 equipped with a cooling unit 10 according to an embodiment of the present invention. As shown in FIG. 1, a vehicular lamp 100 includes a resin lamp body 102 whose front surface is open, and an outer lens 104 that is formed of a light-transmitting material and covers the front surface of the lamp body 102 in an airtight manner. A lamp unit 108 using a semiconductor light emitting element as a light source is accommodated in the lamp chamber 106 configured.
　灯具ユニット１０８は、所謂プロジェクタ型の灯具ユニットであり、ＬＥＤを光源として用いている。図示の例では、灯具ユニット１０８は灯室１０６内に１つであるが、複数の灯具ユニット１０８が灯室１０６内に設けられていてもよい。 The lamp unit 108 is a so-called projector-type lamp unit, and uses an LED as a light source. 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.
　灯具ユニット１０８は、ＬＥＤ１１０と、リフレクタ１１４と、支持部材１１６と、投影レンズ１１８とを備えている。ＬＥＤ１１０は、ＬＥＤチップ１１３が回路基板１１２上に実装された白色ＬＥＤである。ＬＥＤ１１０は、光出射方向を灯具ユニット１０８の光軸Ａｘと直角方向に向けた状態で、光軸Ａｘ上に位置するように設けられている。ＬＥＤ１１０は、回路基板１１２に形成された配線パターンを介して給電される。 The lamp unit 108 includes an LED 110, a reflector 114, a support member 116, and a projection lens 118. The LED 110 is a white LED in which the LED chip 113 is mounted on the circuit board 112. The LED 110 is provided so as to be positioned on the optical axis Ax in a state in which the light emission direction is directed in a direction perpendicular to the optical axis Ax of the lamp unit 108. The LED 110 is supplied with power through a wiring pattern formed on the circuit board 112.
　リフレクタ１１４は、たとえば、ポリカーボネイトを用い半ドーム状に形成されて、ＬＥＤ１１０の上方に配置されている。リフレクタ１１４は、その内側の表面に、ＬＥＤ１１０からの光を前方へ向けて光軸Ａｘ寄りに集光反射させる反射面を有している。 The reflector 114 is formed in a semi-dome shape using, for example, polycarbonate, and is disposed above the LED 110. The reflector 114 has, on its inner surface, a reflecting surface that condenses and reflects the light from the LED 110 forward and toward the optical axis Ax.
　投影レンズ１１８は、前方側表面が凸面で後方側表面が平面の平凸非球面レンズからなり、後側焦点面上に形成される光源像を反転像として前方に照射するようになっている。支持部材１１６は、アルミを主成分とする金属によるダイキャストにより形成されており、その上面には、ＬＥＤ１１０および楕円曲面を基調とした反射面を有するリフレクタ１１４が固着されている。 The projection lens 118 is a plano-convex aspheric lens having a convex front surface and a flat rear surface, and irradiates the light source image formed on the rear focal plane forward as a reverse image. The support member 116 is formed by die-casting using a metal whose main component is aluminum, and a reflector 114 having a reflective surface based on an ellipse curved surface is fixed to the upper surface of the support member 116.
　支持部材１１６の後方側端部には、複数の平板フィン１２０が所定の間隔で平行に立設されている。平板フィン１２０は、延設方向が鉛直方向を向くように形成されている。平板フィン１２０の延設方向とは、平板フィン１２０の長手方向である。平板フィン１２０は、ＬＥＤ１１０から発生した熱を灯室１０６内の空気に放熱する。 A plurality of flat fins 120 are erected in parallel at predetermined intervals at the rear side end of the support member 116. The plate fins 120 are formed such that the extending direction faces the vertical direction. The extending direction of the flat plate fin 120 is the longitudinal direction of the flat plate fin 120. The flat fin 120 radiates heat generated from the LED 110 to the air in the lamp chamber 106.
　灯具ユニット１０８は、灯具ユニット１０８が出射する光が車両用灯具１００の前方に照射されるように、図示しない支持部材によりランプボディ１０２に傾動可能に取り付けられる。本実施形態において、灯具ユニット１０８は、灯室１０６の中央付近に設けられている。 The lamp unit 108 is tiltably attached to the lamp body 102 by a support member (not shown) so that the light emitted from the lamp unit 108 is irradiated in front of the vehicular lamp 100. In the present embodiment, the lamp unit 108 is provided near the center of the lamp chamber 106.
　車両用灯具１００は、灯室１０６内の温度を冷却する冷却ユニット１０を備える。図１に示すように、冷却ユニット１０は、外側ヒートシンク１２と、ペルチェ素子１４と、ペルチェ素子１４に供給する電流を制御する電流制御部（図示せず）とを備える。本実施形態では冷却ユニット１０はランプボディ１０２の下面１０２ａに取り付けられているが、冷却ユニット１０はランプボディ１０２の後面１０２ｂや上面１０２ｃに設けられてもよい。ランプボディ１０２の下面１０２ａには孔部１０２ｄが形成されており、冷却ユニット１０は、その孔部１０２ｄ塞ぐように下面１０２ａに装着される。 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. In this embodiment, the cooling unit 10 is attached to the lower surface 102a of the lamp body 102. However, the cooling unit 10 may be provided on the rear surface 102b or 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 mounted on the lower surface 102a so as to close the hole 102d.
　外側ヒートシンク１２は、ベース部１２ａと、ベース部１２ａの下面１２ｂ上に立設された複数の平板フィン１２ｃとを備える。外側ヒートシンク１２は、平板フィン１２ｃが灯室１０６の外部に露出するようにランプボディ１０２の下面１０２ａに固定される。本実施形態では、外側ヒートシンク１２はネジ１３によりランプボディ１０２の下面１０２ａに固定されているが、固定方法は特に限定されない。外側ヒートシンク１２がランプボディ１０２の下面１０２ａに固定されたとき、外側ヒートシンク１２のベース部１２ａの上面１２ｄはランプボディ１０２の孔部１０２ｄを介して灯室１０６の内部空間に面している。 The outer heat sink 12 includes a base portion 12a and a plurality of flat plate fins 12c erected on the lower surface 12b of the base portion 12a. The outer heat sink 12 is fixed to the lower surface 102 a of the lamp body 102 so that the flat fins 12 c 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 with screws 13, but the fixing method is not particularly limited. When the outer heat sink 12 is fixed to the lower surface 102 a of the lamp body 102, the upper surface 12 d of the base portion 12 a of the outer heat sink 12 faces the internal space of the lamp chamber 106 through the hole 102 d of the lamp body 102.
　ペルチェ素子１４は、外側ヒートシンク１２のベース部１２ａの上面１２ｄ上に配置される。ペルチェ素子１４は、電流を流すことにより一方の面から他方の面に熱を移動させる板状の半導体素子である。ペルチェ素子１４は、電流の流れる方向に応じて、吸熱面と放熱面が定まる。本実施形態では、灯室１０６に面するペルチェ素子１４の上面が灯室１０６の内部空間から熱を吸熱する吸熱面１４ａとなり、外側ヒートシンク１２のベース部１２ａの上面１２ｄに面するペルチェ素子１４の下面が吸熱面１４ａで吸熱した熱を外側ヒートシンク１２に放熱する放熱面１４ｂとなるように、ペルチェ素子１４に電流が供給される。ペルチェ素子１４の放熱面１４ｂはベース部１２ａの上面１２ｄに当接してもよいし、ペルチェ素子１４の放熱面１４ｂとベース部１２ａの上面１２ｄとの間に熱伝導性シート等が介在してもよい。 The Peltier element 14 is disposed on the upper surface 12 d of the base portion 12 a of the outer heat sink 12. The Peltier element 14 is a plate-like semiconductor element that moves heat from one surface to the other surface by passing an electric current. The Peltier element 14 has a heat absorbing surface and a heat radiating surface depending on the direction of current flow. In the present embodiment, the upper surface of the Peltier element 14 facing the lamp chamber 106 is a heat absorbing surface 14 a that absorbs heat from the internal space of the lamp chamber 106, and the Peltier element 14 facing the upper surface 12 d of the base portion 12 a of the outer heat sink 12. An electric current is supplied to the Peltier element 14 so that the lower surface becomes the heat radiating surface 14 b that radiates the heat absorbed by the heat absorbing surface 14 a to the outer heat sink 12. The heat dissipation surface 14b of the Peltier element 14 may abut against the upper surface 12d of the base portion 12a, or a heat conductive sheet or the like may be interposed between the heat dissipation surface 14b of the Peltier element 14 and the upper surface 12d of the base portion 12a. Good.
　以上のように構成された冷却ユニット１０の動作について説明する。図１において、実線矢印は熱の流れを表している。上面が吸熱面１４ａ、下面が放熱面１４ｂとなるようにペルチェ素子１４に電流が供給されると、ペルチェ素子１４は吸熱面１４ａで灯室１０６内の空気から熱を吸熱し、その熱を放熱面１４ｂから放熱する。ペルチェ素子１４の放熱面１４ｂから放熱された熱は、外側ヒートシンク１２のベース部１２ａに伝熱され、平板フィン１２ｃから灯室１０６の外部に放熱される。 The operation of the cooling unit 10 configured as described above will be described. In FIG. 1, a solid line arrow represents a heat flow. When current is supplied to the Peltier element 14 so that the upper surface becomes the heat absorbing surface 14a and the lower surface becomes 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. Heat is radiated from the surface 14b. The heat radiated from the heat radiating surface 14 b of the Peltier element 14 is transferred to the base portion 12 a of the outer heat sink 12, and is radiated from the flat fin 12 c to the outside of the lamp chamber 106.
　このように、本実施形態に係る冷却ユニット１０を車両用灯具１００に適用することにより、灯室１０６内の温度を強制的に冷却することができる。車両用灯具の高機能化に伴い、カメラ、種々のセンサ、ＤＭＤ（Digital Mirror Device)などの電子デバイスが灯室内に設けられる可能性があるが、これらの電子デバイスは耐熱温度がそれほど高くない可能性がある。灯室１０６内の温度は灯具ユニット１０８のＬＥＤ１１０からの発熱や、上記電子デバイス等の発熱により高温になりがちであるが、冷却ユニット１０を用いて灯室１０６内の温度を低下させることにより、耐熱温度がそれほど高くない電子デバイスであっても灯室１０６に配置することが可能となる。 Thus, by applying the cooling unit 10 according to the present embodiment to the vehicular lamp 100, the temperature in the lamp chamber 106 can be forcibly cooled. With the increasing functionality of vehicular lamps, electronic devices such as cameras, various sensors, and DMD (Digital Mirror Device) may be provided in the lamp chamber, but these electronic devices may not have a high heat-resistant temperature. There is sex. The temperature in the lamp chamber 106 tends to become high due to the heat generated from the LED 110 of the lamp unit 108 or the heat generated by the electronic device or the like, but by reducing the temperature in the lamp chamber 106 using the cooling unit 10, Even an electronic device whose heat-resistant temperature is not so high can be arranged in the lamp chamber 106.
　図２は、本発明の別の実施形態に係る冷却ユニット２０が装着された車両用灯具２００の概略断面図である。上述の実施形態と同一または対応する構成要素については同じ符号を付し、重複する説明は適宜省略する。 FIG. 2 is a schematic sectional view of a vehicular lamp 200 equipped with a cooling unit 20 according to another embodiment of the present invention. Constituent elements that are the same as or correspond to those in the above-described embodiment are given the same reference numerals, and redundant descriptions are omitted as appropriate.
　本実施形態に係る冷却ユニット２０は、外側ヒートシンク１２およびペルチェ素子１４に加えて、内側ヒートシンク２２を備える点が図１に示す冷却ユニット１０と異なる。内側ヒートシンク２２は、ベース部２２ａと、ベース部２２ａの上面２２ｂ上に立設された複数の平板フィン２２ｃとを備える。内側ヒートシンク２２は、ベース部２２ａの下面２２ｄがペルチェ素子１４の吸熱面１４ａに当接するように、ペルチェ素子１４上に配置される。あるいは、ベース部２２ａの下面２２ｄとペルチェ素子１４の吸熱面１４ａとの間に熱伝導性シート等が介在してもよい。 The cooling unit 20 according to this 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 flat plate fins 22c erected on the upper surface 22b of the base portion 22a. The inner heat sink 22 is disposed on the Peltier element 14 so that the lower surface 22d of the base portion 22a contacts the heat absorbing surface 14a of the Peltier element 14. Alternatively, a thermally 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.
　以上のように構成された冷却ユニット２０の動作について説明する。図２において、実線矢印は熱の流れを表している。本実施形態においても、上面が吸熱面１４ａ、下面が放熱面１４ｂとなるようにペルチェ素子１４に電流が供給される。本実施形態において新たに設けられた内側ヒートシンク２２は、灯室１０６内の空気の熱を受けて、ペルチェ素子１４の吸熱面１４ａに伝熱する。ペルチェ素子１４は、吸熱面１４ａで内側ヒートシンク２２から熱を吸熱し、その熱を放熱面１４ｂから放熱する。ペルチェ素子１４の放熱面１４ｂから放熱された熱は、外側ヒートシンク１２のベース部１２ａに伝熱され、平板フィン１２ｃから灯室１０６の外部に放熱される。 The operation of the cooling unit 20 configured as described above will be described. In FIG. 2, the solid line arrow represents the flow of heat. Also in the present embodiment, a current is supplied to the Peltier element 14 so that the upper surface is the heat absorbing surface 14a and the lower surface is the heat radiating surface 14b. The inner heat sink 22 newly provided in the present embodiment receives heat from the air in the lamp chamber 106 and transfers heat to the heat absorbing surface 14 a of the Peltier element 14. The Peltier element 14 absorbs heat from the inner heat sink 22 at the heat absorbing surface 14a and radiates the heat from the heat radiating surface 14b. The heat radiated from the heat radiating surface 14 b of the Peltier element 14 is transferred to the base portion 12 a of the outer heat sink 12, and is radiated from the flat fin 12 c to the outside of the lamp chamber 106.
　このように、本実施形態に係る冷却ユニット２０を車両用灯具２００に適用した場合も、灯室１０６内の温度を強制的に冷却することができる。その結果、耐熱温度がそれほど高くない電子デバイスであっても灯室１０６に配置することが可能となる。 Thus, even when the cooling unit 20 according to the present embodiment is applied to the vehicular lamp 200, the temperature in the lamp chamber 106 can be forcibly cooled. As a result, even an electronic device whose heat-resistant temperature is not so high can be arranged in the lamp chamber 106.
　図３は、本発明のさらに別の実施形態に係る冷却ユニット３０が装着された車両用灯具３００の概略断面図である。上述の実施形態と同一または対応する構成要素については同じ符号を付し、重複する説明は適宜省略する。 FIG. 3 is a schematic cross-sectional view of a vehicular lamp 300 equipped with a cooling unit 30 according to still another embodiment of the present invention. Constituent elements that are the same as or correspond to those in the above-described embodiment are given the same reference numerals, and redundant descriptions are omitted as appropriate.
　本実施形態に係る冷却ユニット３０は、外側ヒートシンク１２およびペルチェ素子１４に加えて、内側ファン３２を備える点が図１に示す冷却ユニット１０と異なる。内側ファン３２は、軸方向から吸い込んだ空気を軸方向に排気する軸流ファンである。内側ファン３２は、ペルチェ素子１４の吸熱面１４ａに向かって灯室１０６内の空気を送風するように配置される。内側ファン３２は、図示しない支持部材により、ペルチェ素子１４の上方に支持されている。 The cooling unit 30 according to this 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 exhausts air sucked from the axial direction in the axial direction. The inner fan 32 is arranged so as to blow the air in the lamp chamber 106 toward the heat absorbing surface 14 a of the Peltier element 14. The inner fan 32 is supported above the Peltier element 14 by a support member (not shown).
　以上のように構成された冷却ユニット３０の動作について説明する。図３において、実線矢印は熱の流れを表し、白抜き矢印は空気の流れを表している。本実施形態においても、上面が吸熱面１４ａ、下面が放熱面１４ｂとなるようにペルチェ素子１４に電流が供給される。本実施形態においては、内側ファン３２により、灯室１０６内の空気がペルチェ素子１４の吸熱面１４ａに吹き付けられる。ペルチェ素子１４は、吸熱面１４ａで吹き付けられた空気から熱を吸熱し、その熱を放熱面１４ｂから放熱する。ペルチェ素子１４の放熱面１４ｂから放熱された熱は、外側ヒートシンク１２のベース部１２ａに伝熱され、平板フィン１２ｃから灯室１０６の外部に放熱される。 The operation of the cooling unit 30 configured as described above will be described. In FIG. 3, a solid line arrow represents a heat flow, and a white arrow represents an air flow. Also in the present embodiment, a current is supplied to the Peltier element 14 so that the upper surface is the heat absorbing surface 14a and the lower surface is the heat radiating surface 14b. In the present embodiment, the air in the lamp chamber 106 is blown onto the heat absorbing surface 14 a of the Peltier element 14 by the inner fan 32. The Peltier element 14 absorbs heat from the air blown by the heat absorbing surface 14a, and radiates the heat from the heat radiating surface 14b. The heat radiated from the heat radiating surface 14 b of the Peltier element 14 is transferred to the base portion 12 a of the outer heat sink 12, and is radiated from the flat fin 12 c to the outside of the lamp chamber 106.
　このように、本実施形態に係る冷却ユニット３０を車両用灯具３００に適用した場合も、灯室１０６内の温度を強制的に冷却することができる。その結果、耐熱温度がそれほど高くない電子デバイスであっても灯室１０６に配置することが可能となる。 Thus, even when the cooling unit 30 according to the present embodiment is applied to the vehicular lamp 300, the temperature in the lamp chamber 106 can be forcibly cooled. As a result, even an electronic device whose heat-resistant temperature is not so high can be arranged in the lamp chamber 106.
　また、本実施形態においては、内側ファン３２によりペルチェ素子１４に吹き付けられた空気は、熱交換により冷却される。この冷却された空気は、アウターレンズ１０４やランプボディ１０２に内面に沿って灯室１０６に流れるので、灯室１０６の広い範囲を冷却することができる。 In this embodiment, the air blown to the Peltier element 14 by the inner fan 32 is cooled by heat exchange. Since this cooled air flows into the lamp chamber 106 along the inner surface of the outer lens 104 and the lamp body 102, a wide range of the lamp chamber 106 can be cooled.
　図４は、本発明のさらに別の実施形態に係る冷却ユニット４０が装着された車両用灯具４００の概略断面図である。上述の実施形態と同一または対応する構成要素については同じ符号を付し、重複する説明は適宜省略する。 FIG. 4 is a schematic cross-sectional view of a vehicular lamp 400 equipped with a cooling unit 40 according to still another embodiment of the present invention. Constituent elements that are the same as or correspond to those in the above-described embodiment are given the same reference numerals, and redundant descriptions are omitted as appropriate.
　本実施形態に係る冷却ユニット４０は、外側ヒートシンク１２、ペルチェ素子１４および内側ヒートシンク２２に加えて、内側ファン３２を備える点が図２に示す冷却ユニット２０と異なる。内側ファン３２は、軸流ファンであり、内側ヒートシンク２２に向かって灯室１０６内の空気を送風するように配置される。内側ヒートシンク２２は、平板フィン２２ｃの延設方向が車両用灯具４００の前後方向を向くように配置されている。 The cooling unit 40 according to this 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 the air in the lamp chamber 106 toward the inner heat sink 22. The inner heat sink 22 is disposed so that the extending direction of the flat fins 22 c faces the front-rear direction of the vehicular lamp 400.
　以上のように構成された冷却ユニット４０の動作について説明する。図４において、実線矢印は熱の流れを表し、白抜き矢印は空気の流れを表している。本実施形態においても、上面が吸熱面１４ａ、下面が放熱面１４ｂとなるようにペルチェ素子１４に電流が供給される。本実施形態においては、内側ファン３２により、灯室１０６内の空気が内側ヒートシンク２２に吹き付けられる。内側ヒートシンク２２は、内側ファン３２により吹き付けられた空気の熱を受けて、ペルチェ素子１４の吸熱面１４ａに伝熱する。ペルチェ素子１４は、吸熱面１４ａで内側ヒートシンク２２から熱を吸熱し、その熱を放熱面１４ｂから放熱する。ペルチェ素子１４の放熱面１４ｂから放熱された熱は、外側ヒートシンク１２のベース部１２ａに伝熱され、平板フィン１２ｃから灯室１０６の外部に放熱される。 The operation of the cooling unit 40 configured as described above will be described. In FIG. 4, a solid line arrow represents a heat flow, and a white arrow represents an air flow. Also in the present embodiment, a current is supplied to the Peltier element 14 so that the upper surface is the heat absorbing surface 14a and the lower surface is the heat radiating surface 14b. In the present embodiment, the air in the lamp chamber 106 is blown to the inner heat sink 22 by the inner fan 32. The inner heat sink 22 receives the heat of the air blown by the inner fan 32 and transfers the heat to the heat absorbing surface 14 a of the Peltier element 14. The Peltier element 14 absorbs heat from the inner heat sink 22 at the heat absorbing surface 14a and radiates the heat from the heat radiating surface 14b. The heat radiated from the heat radiating surface 14 b of the Peltier element 14 is transferred to the base portion 12 a of the outer heat sink 12, and is radiated from the flat fin 12 c to the outside of the lamp chamber 106.
　このように、本実施形態に係る冷却ユニット４０を車両用灯具４００に適用した場合も、灯室１０６内の温度を強制的に冷却することができる。その結果、耐熱温度がそれほど高くない電子デバイスであっても灯室１０６に配置することが可能となる。 Thus, even when the cooling unit 40 according to the present embodiment is applied to the vehicular lamp 400, the temperature in the lamp chamber 106 can be forcibly cooled. As a result, even an electronic device whose heat-resistant temperature is not so high can be arranged in the lamp chamber 106.
　また、本実施形態においては、内側ファン３２により内側ヒートシンク２２に吹き付けられた空気は、熱交換により冷却される。この冷却された空気は、アウターレンズ１０４やランプボディ１０２に内面に沿って灯室１０６に流れるので、灯室１０６の広い範囲を冷却することができる。 In this embodiment, the air blown to the inner heat sink 22 by the inner fan 32 is cooled by heat exchange. Since this cooled air flows into the lamp chamber 106 along the inner surface of the outer lens 104 and the lamp body 102, a wide range of the lamp chamber 106 can be cooled.
　図５は、本発明のさらに別の実施形態に係る冷却ユニット５０が装着された車両用灯具５００の概略断面図である。上述の実施形態と同一または対応する構成要素については同じ符号を付し、重複する説明は適宜省略する。 FIG. 5 is a schematic cross-sectional view of a vehicular lamp 500 equipped with a cooling unit 50 according to still another embodiment of the present invention. Constituent elements that are the same as or correspond to those in the above-described embodiment are given the same reference numerals, and redundant descriptions are omitted as appropriate.
　本実施形態に係る冷却ユニット５０は、外側ヒートシンク１２およびペルチェ素子１４に加えて、灯室１０６の外部に配置される外部ファン５２を備える点が図１に示す冷却ユニット１０と異なる。外部ファン５２は、軸流ファンであり、灯室１０６の外部の空気を外側ヒートシンク１２の外部露出部、すなわち平板フィン１２ｃやベース部１２ａの下面１２ｂに向かって送風する。外側ヒートシンク１２は、平板フィン１２ｃの延設方向が車両用灯具５００の前後方向を向くように配置されている。 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 outer 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 an externally exposed portion of the outer heat sink 12, that is, the flat fin 12c and the lower surface 12b of the base portion 12a. The outer heat sink 12 is disposed such that the extending direction of the flat fins 12 c faces the front-rear direction of the vehicular lamp 500.
　以上のように構成された冷却ユニット５０の動作について説明する。図５において、実線矢印は熱の流れを表し、白抜き矢印は空気の流れを表している。本実施形態においても、上面が吸熱面１４ａ、下面が放熱面１４ｂとなるようにペルチェ素子１４に電流が供給される。本実施形態においては、図１に示す冷却ユニット１０と同様に、ペルチェ素子１４の吸熱面１４ａで灯室１０６内の空気から熱が吸熱され、その熱が放熱面１４ｂから放熱される。ペルチェ素子１４の放熱面１４ｂから放熱された熱は、外側ヒートシンク１２のベース部１２ａに伝熱され、平板フィン１２ｃから灯室１０６の外部に放熱される。ここで本実施形態に係る冷却ユニット５０では、外部ファン５２により灯室１０６の外部の空気が外側ヒートシンク１２の平板フィン１２ｃ等に吹き付けられるので、外側ヒートシンク１２における熱交換が促進され、放熱効率を高めることができる。 The operation of the cooling unit 50 configured as described above will be described. In FIG. 5, the solid line arrow represents the flow of heat, and the white arrow represents the flow of air. Also in the present embodiment, a current is supplied to the Peltier element 14 so that the upper surface is the heat absorbing surface 14a and the lower surface is the heat radiating surface 14b. In the present embodiment, similarly to 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 14b. The heat radiated from the heat radiating surface 14 b of the Peltier element 14 is transferred to the base portion 12 a of the outer heat sink 12, and is radiated from the flat fin 12 c to the outside of the lamp chamber 106. Here, in the cooling unit 50 according to the present embodiment, air outside the lamp chamber 106 is blown by the external fan 52 to the flat fins 12c of the outer heat sink 12, etc., so heat exchange in the outer heat sink 12 is promoted and heat dissipation efficiency is improved. Can be increased.
　外部ファン５２は、図２に示す冷却ユニット２０、図３に示す冷却ユニット３０、図４に示す冷却ユニット４０に対して設けられてもよい。これらの実施形態に設けられた場合も、放熱効率を高めることができる。 The external fan 52 may be provided for the cooling unit 20 shown in FIG. 2, the cooling unit 30 shown in FIG. 3, and the cooling unit 40 shown in FIG. Also when provided in these embodiments, the heat dissipation efficiency can be increased.
　図６は、本発明のさらに別の実施形態に係る冷却ユニット６０が装着された車両用灯具６００の概略断面図である。上述の実施形態と同一または対応する構成要素については同じ符号を付し、重複する説明は適宜省略する。 FIG. 6 is a schematic cross-sectional view of a vehicular lamp 600 equipped with a cooling unit 60 according to still another embodiment of the present invention. Constituent elements that are the same as or correspond to those in the above-described embodiment are given the same reference numerals, and redundant descriptions are omitted as appropriate.
　本実施形態に係る冷却ユニット６０は、外側ヒートシンク１２、ペルチェ素子１４および内側ヒートシンク２２に加えて、内側ファン６２およびダクト６４を備える点が図２に示す冷却ユニット２０と異なる。内側ファン６２は、遠心ファンであり、灯室１０６内の空気を吸い込み、排気口６２ａから送風する。排気口６２ａにはダクト６４が接続されている。ダクト６４は、排気口６２ａからの空気を灯具ユニット１０８の平板フィン１２０に導くように延在している。内側ヒートシンク２２は、平板フィン２２ｃの延設方向が車両用灯具６００の前後方向を向くように配置されている。 The cooling unit 60 according to this embodiment is different from the cooling unit 20 shown in FIG. 2 in that it includes an inner fan 62 and a 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, sucks the air in the lamp chamber 106, and blows it from the exhaust port 62a. A duct 64 is connected to the exhaust port 62a. The duct 64 extends so as to guide the air from the exhaust port 62 a to the flat fin 120 of the lamp unit 108. The inner heat sink 22 is disposed so that the extending direction of the flat fins 22 c faces the front-rear direction of the vehicular lamp 600.
　以上のように構成された冷却ユニット６０の動作について説明する。図６において、実線矢印は熱の流れを表し、白抜き矢印は空気の流れを表している。本実施形態においても、上面が吸熱面１４ａ、下面が放熱面１４ｂとなるようにペルチェ素子１４に電流が供給される。本実施形態においては、内側ファン６２により灯室１０６内の空気が吸い込まれ、ダクト６４を介して灯具ユニット１０８の平板フィン１２０に送られる。この空気の流れの間に、熱交換により空気の熱が内側ヒートシンク２２に伝熱される。内側ヒートシンク２２が受けた熱はペルチェ素子１４の吸熱面１４ａにより吸熱され、放熱面１４ｂから放熱される。ペルチェ素子１４の放熱面１４ｂから放熱された熱は、外側ヒートシンク１２のベース部１２ａに伝熱され、平板フィン１２ｃから灯室１０６の外部に放熱される。 The operation of the cooling unit 60 configured as described above will be described. In FIG. 6, a solid line arrow represents a heat flow, and a white arrow represents an air flow. Also in the present embodiment, a current is supplied to the Peltier element 14 so that the upper surface is the heat absorbing surface 14a and the lower surface is the heat radiating surface 14b. In the present embodiment, the air in the lamp chamber 106 is sucked by the inner fan 62 and sent to the flat fins 120 of the lamp unit 108 via the duct 64. During the air flow, heat of the air is transferred to the inner heat sink 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 radiated from the heat radiating surface 14b. The heat radiated from the heat radiating surface 14 b of the Peltier element 14 is transferred to the base portion 12 a of the outer heat sink 12, and is radiated from the flat fin 12 c to the outside of the lamp chamber 106.
　このように、本実施形態に係る冷却ユニット６０を車両用灯具６００に適用した場合も、灯室１０６内の温度を強制的に冷却することができる。その結果、耐熱温度がそれほど高くない電子デバイスであっても灯室１０６に配置することが可能となる。 Thus, even when the cooling unit 60 according to the present embodiment is applied to the vehicular lamp 600, the temperature in the lamp chamber 106 can be forcibly cooled. As a result, even an electronic device whose heat-resistant temperature is not so high can be arranged in the lamp chamber 106.
　また、本実施形態においては、内側ファン６２によって、熱交換により冷却された空気がダクト６４を介して灯具ユニット１０８の平板フィン１２０に送風される。これにより、平板フィン１２０を冷却することができるので、灯具ユニット１０８の放熱効率を高めることができる。 In the present embodiment, the air cooled by heat exchange is blown to the flat fins 120 of the lamp unit 108 via the duct 64 by the inner fan 62. Thereby, since the flat fin 120 can be cooled, the heat dissipation efficiency of the lamp unit 108 can be improved.
　本実施形態では、熱交換により冷却された空気を灯具ユニット１０８の平板フィン１２０に送風したが、冷却された空気は灯室１０６に配置される他のデバイスに送風されてもよい。 In the present embodiment, air cooled by heat exchange is blown to the flat fins 120 of the lamp unit 108, but the cooled air may be blown to other devices arranged in the lamp chamber 106.
　内側ファン６２は、図１に示す冷却ユニット１０、図５に示す冷却ユニット５０に対して設けられてもよい。これらの実施形態に設けられた場合も、放熱効率を高めることができる。 The inner fan 62 may be provided for the cooling unit 10 shown in FIG. 1 and the cooling unit 50 shown in FIG. Also when provided in these embodiments, the heat dissipation efficiency can be increased.
　図７は、本発明のさらに別の実施形態に係る冷却ユニット７０が装着された車両用灯具７００の概略断面図である。上述の実施形態と同一または対応する構成要素については同じ符号を付し、重複する説明は適宜省略する。 FIG. 7 is a schematic cross-sectional view of a vehicular lamp 700 equipped with a cooling unit 70 according to still another embodiment of the present invention. Constituent elements that are the same as or correspond to those in the above-described embodiment are given the same reference numerals, and redundant descriptions are omitted as appropriate.
　本実施形態に係る冷却ユニット７０は、図２に示す冷却ユニット２０と同様に、外側ヒートシンク１２と、外側ヒートシンク１２のベース部１２ａ上に配置されたペルチェ素子１４と、ペルチェ素子１４上に配置された内側ヒートシンク２２とを備える。図７に示すように、内側ヒートシンク２２のベース部２２ａとペルチェ素子１４の吸熱面１４ａとの間に熱伝導性シート７１が配置されてもよい。また、外側ヒートシンク１２のベース部１２ａとペルチェ素子１４の放熱面１４ｂとの間に熱伝導性シート７２が配置されてもよい。 The cooling unit 70 according to the present embodiment is arranged on the outer heat sink 12, the Peltier element 14 disposed on the base portion 12 a of the outer heat sink 12, and the Peltier element 14, similarly to the cooling unit 20 illustrated in FIG. 2. And an inner heat sink 22. As shown in FIG. 7, a heat conductive sheet 71 may be disposed between the base portion 22 a of the inner heat sink 22 and the heat absorbing surface 14 a of the Peltier element 14. Further, a heat conductive sheet 72 may be disposed between the base portion 12 a of the outer heat sink 12 and the heat radiation surface 14 b of the Peltier element 14.
　本実施形態に係る冷却ユニット７０は、さらに、吸湿体７３を備える。この吸湿体７３は、灯室１０６内で生じた結露を吸湿する。吸湿体７３は、例えばゼオライトから成るものを利用できるが、これに限定されない。 The cooling unit 70 according to the present embodiment further includes a moisture absorber 73. The hygroscopic body 73 absorbs dew condensation generated in the lamp chamber 106. The hygroscopic material 73 can be made of, for example, zeolite, but is not limited thereto.
　吸湿体７３は、内側ヒートシンク２２におけるペルチェ素子１４側の面（すなわち下面２２ｄ）と反対側の面（すなわち上面２２ｂ）の周縁部に配置される。吸湿体７３は、図７に示すように、複数の平板フィン２２ｃの周囲を囲うように配置されることが好ましい。吸湿体７３は、ベース部２２ａの上面２２ｂ上に配置されてもよいし、上面２２ｂに窪みを設け、該窪みに配置されてもよい。窪みは、上面２２ｂの周縁部に配置されてよい。 The hygroscopic body 73 is disposed on the peripheral portion of the surface (that is, the upper surface 22b) opposite to the surface (that is, the lower surface 22d) on the Peltier element 14 side of the inner heat sink 22. As shown in FIG. 7, it is preferable that the hygroscopic body 73 is disposed so as to surround the plurality of flat plate fins 22c. The moisture absorber 73 may be disposed on the upper surface 22b of the base portion 22a, or may be disposed in the recess by providing a recess in the upper surface 22b. The depression may be disposed on the peripheral edge of the upper surface 22b.
　以上のように構成された冷却ユニット７０の動作について説明する。本実施形態においても、上面が吸熱面１４ａ、下面が放熱面１４ｂとなるようにペルチェ素子１４に電流が供給される。内側ヒートシンク２２は、灯室１０６内の空気の熱を受けて、ペルチェ素子１４の吸熱面１４ａに伝熱する。ペルチェ素子１４は、吸熱面１４ａで内側ヒートシンク２２から熱を吸熱し、その熱を放熱面１４ｂから放熱する。ペルチェ素子１４の放熱面１４ｂから放熱された熱は、外側ヒートシンク１２のベース部１２ａに伝熱され、平板フィン１２ｃから灯室１０６の外部に放熱される。 The operation of the cooling unit 70 configured as described above will be described. Also in the present embodiment, a current is supplied to the Peltier element 14 so that the upper surface is the heat absorbing surface 14a and the lower surface is the heat radiating surface 14b. The inner heat sink 22 receives heat from the air in the lamp chamber 106 and transfers heat to the heat absorbing surface 14 a of the Peltier element 14. The Peltier element 14 absorbs heat from the inner heat sink 22 at the heat absorbing surface 14a and radiates the heat from the heat radiating surface 14b. The heat radiated from the heat radiating surface 14 b of the Peltier element 14 is transferred to the base portion 12 a of the outer heat sink 12, and is radiated from the flat fin 12 c to the outside of the lamp chamber 106.
　ここで、内側ヒートシンク２２は灯室１０６内の空気よりも低温となるので、内側ヒートシンク２２の表面（特に平板フィン２２ｃの表面）には結露が生じる可能性がある。本実施形態においては、この結露を吸湿体７３で吸湿することができるので、液滴がペルチェ素子１４に接触する事態を防止することができる。これは、ペルチェ素子１４を好適に動作させる上で望ましい。また、吸湿体７３を上面２２ｂの周縁部に配置することで、上面２２ｂから下方へ液滴が垂れるのを防止できる。 Here, since the inner heat sink 22 has a lower temperature than the air in the lamp chamber 106, condensation may occur on the surface of the inner heat sink 22 (particularly the surface of the flat fin 22c). In the present embodiment, since this dew condensation can be absorbed by the moisture absorber 73, it is possible to prevent a situation where the droplet contacts the Peltier element 14. This is desirable for operating the Peltier element 14 suitably. Further, by disposing the hygroscopic body 73 on the peripheral portion of the upper surface 22b, it is possible to prevent the liquid droplet from dripping downward from the upper surface 22b.
　図８は、本発明のさらに別の実施形態に係る冷却ユニット８０が装着された車両用灯具８００の概略断面図である。上述の実施形態と同一または対応する構成要素については同じ符号を付し、重複する説明は適宜省略する。 FIG. 8 is a schematic cross-sectional view of a vehicular lamp 800 equipped with a cooling unit 80 according to still another embodiment of the present invention. Constituent elements that are the same as or correspond to those in the above-described embodiment are given the same reference numerals, and redundant descriptions are omitted as appropriate.
　本実施形態に係る冷却ユニット８０は、図４に示す冷却ユニット４０と同様に、外側ヒートシンク１２と、外側ヒートシンク１２のベース部１２ａ上に配置されたペルチェ素子１４と、ペルチェ素子１４上に配置された内側ヒートシンク２２と、内側ヒートシンク２２に向かって灯室１０６内の空気を送風するように配置された内側ファン３２とを備える。図８に示すように、内側ヒートシンク２２のベース部２２ａとペルチェ素子１４の吸熱面１４ａとの間に熱伝導性シート７１が配置されてもよい。また、外側ヒートシンク１２のベース部１２ａとペルチェ素子１４の放熱面１４ｂとの間に熱伝導性シート７２が配置されてもよい。 The cooling unit 80 according to the present embodiment is disposed on the outer heat sink 12, the Peltier element 14 disposed on the base portion 12 a of the outer heat sink 12, and the Peltier element 14, similarly to the cooling unit 40 illustrated in FIG. 4. The inner heat sink 22 and the inner fan 32 arranged to blow the 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 22 a of the inner heat sink 22 and the heat absorbing surface 14 a of the Peltier element 14. Further, a heat conductive sheet 72 may be disposed between the base portion 12 a of the outer heat sink 12 and the heat radiation surface 14 b of the Peltier element 14.
　本実施形態に係る冷却ユニット７０は、さらに、外側ヒートシンク１２と内側ヒートシンク２２との間の伝熱を遮断する断熱部材８２をさらに備える。この断熱部材８２は、外側ヒートシンク１２と内側ヒートシンク２２の間に配置される樹脂製のスペーサであり、ペルチェ素子１４の周囲を囲うように形成されている。図８に示すように、内側ファン３２、内側ヒートシンク２２、断熱部材８２および外側ヒートシンク１２は、ネジ８４により共締めされている。 The cooling unit 70 according to the present embodiment further includes a heat insulating member 82 that blocks heat transfer between the outer heat sink 12 and the inner heat sink 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 so as to surround the periphery of the Peltier element 14. As shown in FIG. 8, the inner fan 32, the inner heat sink 22, the heat insulating member 82, and the outer heat sink 12 are fastened together with screws 84.
　以上のように構成された冷却ユニット８０の動作について説明する。本実施形態においても、上面が吸熱面１４ａ、下面が放熱面１４ｂとなるようにペルチェ素子１４に電流が供給される。内側ファン３２により、灯室１０６内の空気が内側ヒートシンク２２に吹き付けられる。内側ヒートシンク２２は、内側ファン３２により吹き付けられた空気の熱を受けて、ペルチェ素子１４の吸熱面１４ａに伝熱する。ペルチェ素子１４は、吸熱面１４ａで内側ヒートシンク２２から熱を吸熱し、その熱を放熱面１４ｂから放熱する。ペルチェ素子１４の放熱面１４ｂから放熱された熱は、外側ヒートシンク１２のベース部１２ａに伝熱され、平板フィン１２ｃから灯室１０６の外部に放熱される。 The operation of the cooling unit 80 configured as described above will be described. Also in the present embodiment, a current is supplied to the Peltier element 14 so that the upper surface is the heat absorbing surface 14a and the lower surface is the heat radiating surface 14b. The air in the lamp chamber 106 is blown onto the inner heat sink 22 by the inner fan 32. The inner heat sink 22 receives the heat of the air blown by the inner fan 32 and transfers the heat to the heat absorbing surface 14 a of the Peltier element 14. The Peltier element 14 absorbs heat from the inner heat sink 22 at the heat absorbing surface 14a and radiates the heat from the heat radiating surface 14b. The heat radiated from the heat radiating surface 14 b of the Peltier element 14 is transferred to the base portion 12 a of the outer heat sink 12, and is radiated from the flat fin 12 c to the outside of the lamp chamber 106.
　ここで、本実施形態は、断熱部材８２により、外側ヒートシンク１２と内側ヒートシンク２２との間の伝熱を遮断することができる。これにより、ペルチェ素子１４の吸熱面１４ａと放熱面１４ｂとを好適に断熱できるので、放熱効率を高めることができる。 Here, in this embodiment, the heat transfer between the outer heat sink 12 and the inner heat sink 22 can be blocked by the heat insulating member 82. Thereby, since the heat absorption surface 14a and the heat radiating surface 14b of the Peltier element 14 can be suitably insulated, heat radiation efficiency can be improved.
　以上、実施の形態をもとに本発明を説明した。これらの実施形態は例示であり、各構成要素や各処理プロセスの組合せにいろいろな変形例が可能なこと、またそうした変形例も本発明の範囲にあることは当業者に理解されるところである。例えば、上記冷却ユニットは、ランプボティの底面ではなく、ランプボディの上面、背面、側面に配置されてもよい。また、冷却ユニットは、灯具内に複数配置されてもよい。 The present invention has been described above based on the embodiments. It should be understood by those skilled in the art that these embodiments are exemplifications, and that various modifications can be made to the combination of each component and each processing process, and such modifications are also within the scope of the present invention. For example, the cooling unit may be disposed not on the bottom surface of the lamp body but on the top surface, the back surface, and the side surface of the lamp body. A plurality of cooling units may be arranged in the lamp.
　上述の実施形態では、ペルチェ素子の灯室内側の面が吸熱面となり、ペルチェ素子の灯室外側の面が放熱面となるように、ペルチェ素子に電流を供給した。しかしながら、灯室内の温度が灯室外の温度よりも低く、例えばレーザ光源を正常に動作させるために灯室内の温度を高める必要がある場合には、ペルチェ素子に流す電流の方向を逆にし、ペルチェ素子の灯室内側の面を放熱面とし、ペルチェ素子の灯室外側の面を吸熱面としてもよい。 In the above-described embodiment, a current is supplied to the Peltier element so that the surface inside the lamp chamber of the Peltier element becomes a heat absorbing surface and the surface outside the lamp chamber of the Peltier element becomes a heat radiating surface. However, when the temperature inside the lamp chamber is lower than the temperature outside the lamp chamber, for example, when it is necessary to increase the temperature in the lamp chamber in order to operate the laser light source normally, the direction of the current flowing through the Peltier element is reversed, The surface inside the lamp chamber of the element may be a heat radiating surface, and the surface outside the lamp chamber of the Peltier device may be a heat absorbing surface.
　上記では、冷却ユニットを車両用灯具に適用した場合について説明したが、本発明の実施形態に係る冷却ユニットは、車両用灯具だけでなく、任意の筐体の内部空間の温度を冷却することができる。 In the above description, the case where the cooling unit is applied to a vehicular lamp has been described. However, the cooling unit according to the embodiment of the present invention can cool not only the vehicular lamp but also the temperature of the internal space of an arbitrary housing. it can.
　１０，２０，３０，４０，５０，６０，７０，８０　冷却ユニット、　１２　外側ヒートシンク、　１４　ペルチェ素子、　２２　内側ヒートシンク、　３０　冷却ユニット、　３２，６２　内側ファン、　５２　外部ファン、　６４　ダクト、　７３　吸湿体、　８２　断熱部材、　１００，２００，３００，４００，５００，６００，７００，８００　車両用灯具、　１０２　ランプボディ、　１０４　アウターレンズ、　１０６　灯室、　１０８　灯具ユニット、　１１０　ＬＥＤ、　１２０　平板フィン。 10, 20, 30, 40, 50, 60, 70, 80 Cooling unit, 12 Outer heat sink, 14 Peltier element, 22 Inner heat sink, 30 Cooling unit, 32, 62 Inner fan, 52 External fan, 64 Duct, 73 Moisture absorber , 82 Thermal insulation member, 100, 200, 300, 400, 500, 600, 700, 800 Vehicle lamp, 102 Lamp body, 104 Outer lens, 106 Lamp room, 108 Lamp unit, 110 LED, 120 Flat fin.
　本発明は、車両用灯具に利用できる。 The present invention can be used for a vehicular lamp.

Claims (9)

  1. 　筐体の内部空間の温度を冷却する冷却ユニットであって、
    　一部が前記筐体の外部に露出するように配置される外側ヒートシンクと、
    　前記筐体の内部空間から熱を吸熱する吸熱面と、前記吸熱面で吸熱した熱を前記外側ヒートシンクに放熱する放熱面とを有するペルチェ素子と、
    　を備えることを特徴とする冷却ユニット。     A cooling unit for cooling the temperature of the internal space of the housing,
    An outer heat sink arranged such that a portion is exposed to the outside of the housing;
    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 heat absorbed by the heat absorbing surface to the outer heat sink;
    A cooling unit comprising:
  2. 　前記筐体の内部空間の熱を受けて前記ペルチェ素子の前記吸熱面に伝熱する内側ヒートシンクをさらに備えることを特徴とする請求項１に記載の冷却ユニット。 The cooling unit according to claim 1, further comprising an inner heat sink that receives heat from the internal space of the casing and transfers heat to the heat absorbing surface of the Peltier element.
  3. 　前記外側ヒートシンクと前記内側ヒートシンクとの間の伝熱を遮断する断熱部材をさらに備えることを特徴とする請求項２に記載の冷却ユニット。 The cooling unit according to claim 2, further comprising a heat insulating member that blocks heat transfer between the outer heat sink and the inner heat sink.
  4. 　前記ペルチェ素子の前記吸熱面に向かって前記筐体の内部空間の空気を送風する内側ファンをさらに備えることを特徴とする請求項１から３のいずれかに記載の冷却ユニット。 The cooling unit according to any one of claims 1 to 3, further comprising an inner fan that blows air in an internal space of the housing toward the heat absorption surface of the Peltier element.
  5. 　前記筐体の内部空間の空気を吸い込み、所定の方向に送風する内側ファンをさらに備えることを特徴とする請求項１から３のいずれかに記載の冷却ユニット。 The cooling unit according to any one of claims 1 to 3, further comprising an inner fan that sucks air in an internal space of the housing and blows air in a predetermined direction.
  6. 　前記筐体の外部の空気を前記外側ヒートシンクの外部露出部に向かって送風する外側ファンをさらに備えることを特徴とする請求項１から５のいずれかに記載の冷却ユニット。 The cooling unit according to any one of claims 1 to 5, further comprising an outer fan that blows air outside the casing toward an externally exposed portion of the outer heat sink.
  7. 　前記筐体の内部空間で生じた結露を吸湿する吸湿体をさらに備えることを特徴とする請求項１から６のいずれかに記載の冷却ユニット。 The cooling unit according to any one of claims 1 to 6, further comprising a hygroscopic body that absorbs moisture generated in the internal space of the housing.
  8. 　前記吸湿体は、内側ヒートシンクにおける前記ペルチェ素子側の面と反対側の面の周縁部に配置されることを特徴とする請求項７に記載の冷却ユニット。 The cooling unit according to claim 7, wherein the hygroscopic body is disposed on a peripheral edge of a surface of the inner heat sink opposite to the surface on the Peltier element side.
  9. 　アウターレンズとランプボディとを含んで形成される灯体内部に灯具ユニットが収容される車両用灯具であって、
    　前記灯体内部の温度を冷却する請求項１から８のいずれかに記載の冷却ユニットを備えることを特徴とする車両用灯具。     A vehicular lamp in which a lamp unit is housed inside a lamp body that includes an outer lens and a lamp body,
    A vehicle lamp comprising the cooling unit according to any one of claims 1 to 8, which cools the temperature inside the lamp body.
PCT/JP2019/004102 2018-02-09 2019-02-05 Cooling unit and vehicle lamp WO2019156088A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023198372A1 (en) * 2022-04-12 2023-10-19 Mercedes-Benz Group AG Temperature-regulating module and headlight

Families Citing this family (2)

* Cited by examiner, † Cited by third party
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
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

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004095526A (en) * 2002-07-11 2004-03-25 Honda Motor Co Ltd Defogger for vehicle headlight
JP2008159375A (en) * 2006-12-22 2008-07-10 Toyota Motor Corp Vehicular lamp
JP2008226843A (en) * 2007-03-15 2008-09-25 Valeo Vision Lighting or signal device for automotive having outer wall having heat exchanger
JP2009076323A (en) * 2007-09-20 2009-04-09 Koito Mfg Co Ltd Vehicular lighting fixture
JP2012003847A (en) * 2010-06-14 2012-01-05 Stanley Electric Co Ltd Vehicular lighting fixture
US20150016133A1 (en) * 2012-04-03 2015-01-15 Bayerische Motoren Werke Aktiengesellschaft Illumination Device for a Motor Vehicle

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004095526A (en) * 2002-07-11 2004-03-25 Honda Motor Co Ltd Defogger for vehicle headlight
JP2008159375A (en) * 2006-12-22 2008-07-10 Toyota Motor Corp Vehicular lamp
JP2008226843A (en) * 2007-03-15 2008-09-25 Valeo Vision Lighting or signal device for automotive having outer wall having heat exchanger
JP2009076323A (en) * 2007-09-20 2009-04-09 Koito Mfg Co Ltd Vehicular lighting fixture
JP2012003847A (en) * 2010-06-14 2012-01-05 Stanley Electric Co Ltd Vehicular lighting fixture
US20150016133A1 (en) * 2012-04-03 2015-01-15 Bayerische Motoren Werke Aktiengesellschaft Illumination Device for a Motor Vehicle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023198372A1 (en) * 2022-04-12 2023-10-19 Mercedes-Benz Group AG Temperature-regulating module and headlight

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