Lamp unit and ventilation method for main body housing of lamp

Abstract

A lamp unit (1a) is provided with a main body case (10), a light source (13), and a pump (15). The main body case (10) has a light-transmitting member (11), a main body wall (12), a first opening (12a), and a second opening (12b). The main body wall (12) and the light-transmitting member (11) are joined to form a housing. The first opening part (12a) and the second opening part (12b) are respectively arranged on the main body wall (12) and serve as openings communicated with the external space of the housing. The light source (13) is disposed inside the main body case (10). The pump (15) has a gas discharge port (15a), and the gas discharge port (15a) is connected to the first opening (12a).

Description

Technical Field

[0001] The present invention relates to a lamp unit and a ventilation method for a main body casing of a lamp. Background Art

[0002] Conventionally, there is known a technique for performing ventilation in a lamp such as a vehicle lamp.

[0003] For example, Patent Document 1 describes a vehicle lamp having a lamp chamber formed by a lamp body and a translucent cover. In the vehicle lamp, a vent hole is formed at at least one location of the translucent cover to connect the inner and outer spaces of the lamp chamber. In addition, a filter having waterproof and moisture diffusive properties is installed in a manner to block the vent hole.

[0004] Prior Art Literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Publication No. 2018-45879

[0007] The technology described in Patent Document 1 has room for further study from the perspective of preventing fogging inside the lamp or effectively eliminating fogging generated inside the lamp. Therefore, the present invention provides a lamp unit that is advantageous from the perspective of preventing fogging inside the lamp or effectively eliminating fogging generated inside the lamp. Summary of the invention

[0008] The present invention provides a lamp unit, comprising: A main body shell, comprising a light-transmitting component, a main body wall connected to the light-transmitting component and forming a shell, a first opening portion and a second opening portion located on the main body wall and forming an opening communicating with an external space of the shell; A light source is disposed inside the main housing; and The pump has a gas ejection port connected to the first opening.

[0009] Furthermore, the present invention provides a ventilation method, A method for ventilating a main body housing of a lamp, wherein: The lamp comprises a lamp unit, The lamp unit comprises: The main body shell has a light-transmitting component, a main body wall connected to the light-transmitting component and forming a shell, a first opening portion and a second opening portion located on the main body wall and forming an opening communicating with an external space of the shell; A light source is disposed inside the main body shell; a pump having a gas outlet connected to the first opening; and a ventilation component, used for ventilation between the main body shell and the external space, The ventilation method includes the pump ejecting gas toward the main body casing in a manner satisfying the following conditions: 1000p·t·P·A / V≥3.0 (IIa) 0<t≤300 (IIb) In the above conditions, p is the pressure inside the main body housing when the pump is operating [kPa], t is the discharge time of the pump [seconds], and P is the air permeability coefficient of the ventilation member [cm 3 / (Pa·sec·cm 2 )], A is the permeation area of ​​the ventilation component [cm 2 ], V is the internal volume of the lamp unit [cm 3 ].

[0010] Effects of the Invention

[0011] The above-described lamp unit is advantageous from the viewpoint of preventing fogging of the interior of the lamp or effectively eliminating fogging generated in the interior of the lamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a cross-sectional view schematically showing a lamp unit of the present disclosure.

[0013] Figure 2A It is schematically shown Figure 1 FIG. 1 is a diagram showing an example of the arrangement of openings in a lamp unit.

[0014] Figure 2B It is a diagram schematically showing another example of the arrangement of the openings in the lamp unit.

[0015] Figure 3 It is a cross-sectional view showing an example of a ventilation member in the lamp unit.

[0016] Figure 4 It is a cross-sectional view showing another example of the ventilation member in the lamp unit.

[0017] Figure 5A This is a photo of the front view of the headlight of Chery Tiggo8.

[0018] Figure 5B yes Figure 5A A photograph of the underside of the headlamp is shown.

[0019] Figure 5C This is a photograph of the back side of the lamp unit according to Example 1A.

[0020] Fig. 6AThis is a photo of the front view of the headlight of Geely Emgrand X7.

[0021] Figure 6B yes Fig. 6A A photo of the back of the headlamp is shown.

[0022] Figure 6C This is a photograph of the back side of the lamp unit according to Example 2A.

[0023] Fig. 7A This is a photo of the front of the Ford Escape's headlight.

[0024] Figure 7B yes Fig. 7A A photo of the back of the headlamp is shown.

[0025] Figure 7C This is a photograph of the back side of the lamp unit according to Example 3A.

[0026] Figure 8 This is a diagram showing the relationship between the time T required for fogging to disappear in the evaluation of the ventilation performance of the lamp unit and the value of 1000·p·t·P·A / V. DETAILED DESCRIPTION

[0027] Embodiments of the present invention will be described with reference to the accompanying drawings. It should be noted that the present invention is not limited to the following embodiments.

[0028] like Figure 1 As described, the lamp unit 1a includes a main body shell 10, a light source 13 and a pump 15. The main body shell 10 includes a light-transmitting component 11, a main body wall 12, a first opening 12a and a second opening 12b. The main body wall 12 is joined to the light-transmitting component 11 to form a shell. The first opening 12a and the second opening 12b are respectively located on the main body wall 12, and form openings that communicate with the external space of the shell. The light source 13 is arranged inside the main body shell 10. The pump 15 includes a gas outlet 15a, and the gas outlet 15a is connected to the first opening 12a. The gas outlet 15a is connected to the first opening 12a, for example, through a flow path component such as a tube. The gas outlet 15a can also be directly connected to the first opening 12a.

[0029] When moisture absorption occurs in the lamp, the air inside the lamp becomes warm due to sunlight or lighting of the lamp, and moisture is released into the air. When the inside of the lamp is cooled rapidly in this state, condensation occurs inside the lamp, and fog may occur on the inner surface of the light-transmitting member that transmits light from the light source. For example, the inside of the lamp may be cooled rapidly due to events such as car washing and rain. If the area of ​​fogging on the inner surface of the light-transmitting member is large or the fogging on the inner surface of the light-transmitting member continues for a long time, user dissatisfaction may be aggravated. On the other hand, according to the lamp unit 1a, for example, the air in the external space is sent into the interior of the housing of the lamp unit 1a through the first opening 12a by operating the pump 15. In addition, the moisture existing in the interior of the housing of the lamp unit 1a is guided to the outside of the housing through the second opening 12b. Therefore, in the lamp unit 1a, it is difficult to generate fog on the inner surface of the light-transmitting member 11, and even if fogging occurs on the inner surface of the light-transmitting member 11, it is easy to effectively eliminate the fogging.

[0030] like Figure 1 As shown, the light-transmitting member 11 is disposed, for example, in front of the light source 13 in the traveling direction of the light from the light source 13. In the lamp unit 1a, the light-transmitting member 11 transmits the light from the light source 13.

[0031] like Figure 1 As shown in FIG. 1 , in the lamp unit 1a, the main body wall 12 is configured to cover the rear and side of the light source 13 based on the traveling direction of the light from the light source 13. In the lamp unit 1a, the main body wall 12 is joined to the light transmissive member 11 in a state of contacting the periphery of the light transmissive member 11. The manner of joining the main body wall 12 and the light transmissive member 11 is not limited to a specific manner. The main body wall 12 and the light transmissive member 11 are joined to each other by, for example, snap fastening or screw fastening. The main body wall 12 is composed of, for example, a light-proof member.

[0032] The light source 13 is not limited to a specific light source, and the light source 13 may be a halogen lamp, a HID lamp, or an LED lamp.

[0033] like Figure 1 As shown, the lamp unit 1a includes, for example, a ventilation member 20. The ventilation member 20 is a member for ventilation between the main body housing 10 and the external space of the main body housing 10. The ventilation member 20 is provided at the second opening 12b. The ventilation member 20 is installed at a portion of the main body wall 12 connected to the second opening 12b, for example, so as to cover the second opening 12b so as to allow ventilation.

[0034] The ventilation member 20 is not limited to a specific member as long as ventilation between the main body housing 10 and the external space of the main body housing 10 can be performed. The ventilation member 20 is, for example, a member having air permeability to prevent the intrusion of foreign matter such as water and dust. The ventilation member 20 may include a known air permeable membrane, or may include a porous body such as a woven fabric, a non-woven fabric, or a foam, a mesh, or a net.

[0035] The vent membrane can be either a single-layer membrane or a multilayer membrane. When the vent membrane is a multilayer membrane, each layer can be one selected from the group consisting of a porous membrane, a non-woven fabric, a fabric, and a mesh. The vent membrane preferably includes a porous membrane and a non-woven fabric, and may also include at least one of a fabric and a mesh and a porous membrane, and may also include a plurality of non-woven fabrics. The vent membrane is usually composed of an organic polymer (resin). The material of the porous membrane is, for example, a fluororesin. As the fluororesin, for example, polytetrafluoroethylene (PTFE), polytrichlorofluoroethylene, tetrafluoroethylene-hexafluoropropylene copolymer, or tetrafluoroethylene-ethylene copolymer can be used. The material of the non-woven fabric, fabric, and mesh is, for example, polyester such as polyethylene terephthalate, polyolefins such as polyethylene and polypropylene, nylon, aromatic polyamide, or ethylene vinyl acetate copolymer.

[0036] The air-permeable membrane includes, for example, a stretched PTFE porous membrane. In this case, the stretched PTFE porous membrane may be laminated on an air-permeable supporting material such as a nonwoven fabric.

[0037] The vent film can also be treated with liquid repellent as needed. The liquid repellent treatment is carried out, for example, by forming a liquid repellent film containing a fluorine-based surface modifier having a perfluoroalkyl group on the vent film. The formation of the liquid repellent film is not particularly limited, for example, by using methods such as air spraying, electrostatic spraying, dip coating, spin coating, roller coating, curtain flow coating or dipping, by coating the resin porous film with a solution or dispersion of a fluorine-based surface modifier having a perfluoroalkyl group. In addition, the liquid repellent film can also be formed by electrodeposition coating or plasma polymerization.

[0038] The pump 15 is not limited to a specific pump as long as it has the gas discharge port 15a. The pump 15 has a maximum discharge pressure P of 0.5 to 20 kPa, for example. dis_max In this case, in the lamp unit 1a, fogging is unlikely to occur on the inner surface of the light-transmitting member 11. Even if fogging occurs, the main body housing 10 and the ventilation member 20 are not damaged and the fogging can be easily and effectively eliminated. Maximum discharge pressure P dis_max It is preferably 10 kPa or less, more preferably 5 kPa or less, and even more preferably 4 kPa or less. dis_maxFor example, the maximum discharge pressure P can be determined by connecting one end of a flow path component such as a tube to the gas outlet 15a and connecting the other end of the flow path component to the first opening 12a. A pressure gauge can be arranged between the gas outlet 15a of the flow path component and the first opening 12a, and the pressure displayed by the pressure gauge can be read when the pump 15 is operated at maximum output. dis_max .

[0039] The arrangement of the first opening 12a and the second opening 12b in the main body wall 12 is not limited to a specific arrangement. Figure 2A As shown, the first opening 12a and the second opening 12b are arranged at ends on opposite sides of a specific direction in the outer surface of the main body wall 12, for example, when viewed from above at a portion that becomes the back of the lamp unit 1a. The first opening 12a and the second opening 12b are arranged diagonally to each other at a position that is diagonal to the outer surface of the main body wall 12. According to this structure, the flow of air sent from the pump 15 to the inside of the main body shell 10 of the lamp unit 1a can easily spread to a larger range inside the main body shell 10. Therefore, in the lamp unit 1a, it is difficult to generate fog on the inner surface of the light-transmitting component 11. Even if fog is generated, it is easy to eliminate the fog more effectively. At least one of the first opening 12a and the second opening 12b can also be arranged on the side of the main body wall 12.

[0040] The main body wall 12 may also have a plurality of first openings 12a. When the main body wall 12 has a plurality of first openings 12a, the lamp unit 1a may include a plurality of pumps 15, and the gas outlets 15a of the plurality of pumps 15 are connected to the respective first openings 12a. The gas outlet 15a of one pump 15 may also be connected to a plurality of first openings 12a.

[0041] The main body wall 12 may also have a plurality of second openings 12b. Figure 2B As shown in FIG. 1 , the main body wall 12 may have two second openings 12b, for example. The first opening 12a and the plurality of second openings 12b are disposed at ends on opposite sides of a specific direction in a top view of a portion of the outer surface of the main body wall 12 that becomes the back side of the lamp unit 1a. The two second openings 12b are disposed, for example, at a pair of adjacent corners of the outer surface of the main body wall 12. For example, Figure 2B As shown, in the outer surface of the main body wall 12, when the portion which becomes the back side of the lamp unit 1a is viewed from above, one of the plurality of second openings 12b is arranged to be separated from the straight line L intersecting the first opening 12a and the other second openings 12b. At least one of the first opening 12a and the plurality of second openings 12b may be located at the side of the main body wall 12.

[0042] The main body wall 12 may have an opening communicating with the external space of the main body case 10 in addition to the first opening 12a and the second opening 12b. The main body wall 12 may have three or less openings, for example.

[0043] The shapes of the first opening 12a and the second opening 12b in the main body wall 12 are not limited to specific shapes. In each of the first opening 12a and the second opening 12b, the end of the opening connected to the external space of the main body housing 10 may be located on the same plane as the surrounding of the opening, or may be located at the front end of a portion protruding from the surrounding of the opening.

[0044] The ventilation component 20 may be a patch-type ventilation component, a snap-on type ventilation component, a cap-type ventilation component, or other types of ventilation components.

[0045] When the ventilation component 20 is a patch-type ventilation component, the ventilation component 20 is installed at a position in contact with the second opening 12b of the main body wall 12 in a state where the adhesive tape overlapping the ventilation membrane along the periphery of the ventilation membrane is in contact with the outer surface of the main body wall 12 around the second opening 12b.

[0046] Figure 3 FIG. 2 shows an example of a ventilation member 20 in which the ventilation member 20 is a snap-fit ​​type ventilation member. Figure 3 As shown, the ventilation component 20 includes a ventilation membrane 21, a support portion 22, and a protrusion 23. The support portion 22 is an annular and plate-shaped portion having a through hole forming a part of the ventilation path 25a at the center thereof, and the ventilation membrane 21 is fixed to the support portion 22 in a manner covering the through hole. The protrusion 23 is a cylindrical portion protruding from the support portion 22 at the center of the support portion 22. The protrusion 23 has a plurality of legs 23g arranged separately from each other around its axis. A protrusion 23a protruding outward is formed at the front end portion of each of the plurality of legs 23g in a direction perpendicular to the axis of the support portion 22. The protrusion 23a is opposite to the inner surface 12m of the main body wall 12. The ventilation component 20 is configured so that the ventilation component 20 is engaged with the main body wall 12 through the protrusion 23a. The ventilation component 20 also includes a sealing component 24, for example. The sealing member 24 is arranged around the protruding portion 23 at a corner formed by the outer surface of the protruding portion 23 and the supporting portion 22. The sealing member 24 is an annular member, and is arranged in a state of contact with the supporting portion 22 and the outer surface of the main body wall 12. Thus, the air passage 25a is sealed relative to the external space of the main body wall 12 between the supporting portion 22 and the outer surface of the main body wall 12.

[0047] like Figure 3As shown, the ventilation member 20 further includes, for example, a cover 26. The cover 26 covers the ventilation membrane 21, and a ventilation path 25b is formed between the ventilation membrane 21 and the cover 26. An opening is formed on the side of the cover 26, and ventilation between the internal space of the main body wall 12 and the external space of the main body wall 12 can be performed through the ventilation path 25a and the ventilation path 25b.

[0048] Figure 4 FIG. 2 shows an example of a ventilation member 20 in which the ventilation member 20 is a hat-shaped ventilation member. Figure 4 As shown, the cap-shaped ventilation component 20, for example, includes a ventilation membrane 21, a cap 27, and a lining component 28. The ventilation component 20 is mounted on the main body wall 12 in a state where the inner surface of the lining component 28 is in contact with the outer surface of the protrusion 12p. Thus, the inner surface of the lining component 28 and the outer surface of the protrusion 12p are kept airtight. The protrusion 12p is a cylindrical portion protruding outward in the main body wall 12, and a second opening portion 12b is formed therein. The lining component 28 is a cylindrical component. A ventilation membrane 21 is fixed to one end of the lining component 28 in a manner that covers the internal space of the lining component 28. The cap 27 is mounted on the lining component 28 in a manner that covers the ventilation membrane 21. There is a gap between a portion of the side wall of the cap 27 and the lining component 28 that is included in a portion of the ventilation path.

[0049] In the lamp unit 1a, the combination of the main body shell 10, the pump 15 and the ventilation component 20 is not limited to a specific combination. The main body shell 10, the pump 15 and the ventilation component 20 are, for example, a combination that satisfies the conditions of the following equations (Ia) and (Ib). In this case, in the lamp unit 1a, it is difficult for fog to occur on the inner surface of the light-transmitting component 11, and even if fog occurs, it is easy to eliminate the fog more effectively. Among these conditions, p is the pressure inside the main body shell 10 when the pump 15 is working [kPa], t is the spraying time of the pump 15 [seconds], and P is the air permeability coefficient of the ventilation component 20 [cm 3 / (Pa·sec·cm 2 )], A is the permeation area of ​​the ventilation component 20 [cm 2 ], V is the internal volume of the lamp unit 1a [cm 3 ]. p is the gauge pressure.

[0050] 1000p·t·P·A / V≥3.0 (Ia)

[0051] 0<t≤300 (Ib)

[0052] The combination of the main body housing 10, the pump 15, and the ventilation member 20 may satisfy the conditions of 1000p·t·P·A / V≥4, 1000p·t·P·A / V≥5, or 1000p·t·P·A / V≥10. For example, the combination of the main body housing 10, the pump 15, and the ventilation member 20 satisfies the condition of 1000p·t·P·A / V≤20.

[0053] The pressure p inside the main body case 10 can be adjusted, for example, by a valve disposed between the gas ejection port 15a and the first opening 12a. If the pump 15 has a function of adjusting its output in multiple stages, the pressure p can also be adjusted using this function.

[0054] t is preferably 240 seconds or less, more preferably 180 seconds. By satisfying condition (Ia), even when the ejection time t of the pump 15 is as short as this, it is difficult to generate fog on the inner surface of the light-transmitting member 11. Even when fog is generated, it is easy to effectively eliminate the fog. t may also be 10 seconds or more.

[0055] The permeability coefficient P of the ventilation member 20 can be obtained by, for example, converting the air volume [cm 3 / (cm 2 · seconds)] divided by the pressure indicated by the inclined barometer of the Frazier tester, 125 Pa. The permeability coefficient P can also be determined by dividing the pressure by [cm 3 / (Pa·sec·cm 2 The air permeability is determined by converting the measured value indicating the air permeability measured by an air permeability tester other than the Frazier tester, such as a Gurley densometer, in a dimensionless manner.

[0056] The permeability coefficient P is not limited to a specific value. The permeability coefficient P is adjusted, for example, so as to satisfy the condition (Ia). The permeability coefficient P is, for example, 0.00008 to 0.80293 [cm 3 / (Pa·sec·cm 2 )]. In this case, the condition (Ia) is easily satisfied, and fogging is unlikely to occur on the inner surface of the light-transmitting member 11. Even if fogging occurs, it is easier to eliminate the fogging more effectively. The transmittance coefficient P is preferably 0.00008 to 0.8 [cm 3 / (Pa·sec·cm 2 )], more preferably 0.0008 to 0.16 [cm 3 / (Pa·sec·cm 2 )], more preferably 0.004~0.03[cm 3 / (Pa·sec·cm2 )].

[0057] The permeation area A of the ventilation member 20 is the area of ​​the portion of the ventilation member 20 through which air can permeate. For example, when the ventilation member 20 includes a permeable membrane, the effective area of ​​the permeable membrane through which air can permeate corresponds to the permeation area A. For example, when the periphery of the permeable membrane is fixed to a predetermined support material in the ventilation member 20 and the inner side of the periphery of the permeable membrane is in contact with the ventilation path, the area of ​​the portion of the permeable membrane in contact with the ventilation path on the inner side of the periphery of the permeable membrane can correspond to the permeation area A. For example, when the permeable membrane is fixed to the support material with an annular adhesive tape, the area of ​​the inner side of the annular adhesive tape can correspond to the permeation area A. In addition, when the permeable membrane is fixed to the support material by welding, the area of ​​the inner side of the weld can correspond to the permeation area A. When the lamp unit 1a includes a plurality of ventilation members 20, the sum of the permeation areas of the ventilation members 20 can correspond to the permeation area A.

[0058] The permeation area A of the ventilation member 20 is not limited to a specific value. The permeation area A is adjusted, for example, so as to satisfy the condition (Ia). The permeation area A is, for example, 0.03142 to 50.26548 cm 2 In this case, the condition (Ia) is easily satisfied, and even if fogging occurs on the inner surface of the light-transmitting component 11, the fogging can be eliminated more effectively. The transmission area A can be 0.785 to 38.48 cm 2 , can also be 1.767~28.27cm 2 .

[0059] The maximum diameter of the portion corresponding to the permeable area A of the ventilation member 20 is, for example, 2 to 80 mm, may be 10 to 70 mm, or may be 15 to 60 mm.

[0060] The internal space volume V of the lamp unit 1a can be determined by, for example, filling the entire internal space of the lamp unit 1a with water and calculating the value based on V=(W2-W1) / ρ. w In this relationship, W2 is the weight [kg] of the lamp unit 1a after water injection, and W1 is the weight [kg] of the lamp unit 1a before water injection. w is the density of water, which is 1.0×10 -3 kg / cm 3 .

[0061] The space volume V is not limited to a specific value. The space volume V is adjusted, for example, so as to satisfy the condition (Ia). The space volume V is, for example, 1000 to 20000 cm 3 The volume of the passage space V is 1000cm3 As described above, it is easy to emit light from the light source 13 in a desired state. The volume V of the passage space is 20000cm 3 Then, fogging is unlikely to occur on the inner surface of the light-transmitting member 11. Even if fogging occurs, it is easy to effectively eliminate the fogging.

[0062] The space volume V is preferably 2000~18000cm 3 , more preferably 3000~15000cm 3 .

[0063] In the lamp unit 1a, the main body casing 10 is ventilated by the operation of the pump 15. In this case, the pump 15 ejects gas toward the main body casing 10 so as to satisfy the conditions of the above-mentioned formulas (Ia) and (Ib), for example.

[0064] The use of the lamp unit 1a is not limited to a specific use. The lamp unit 1a is used in a vehicle, for example. In a vehicle, the inside of the lamp is rapidly cooled due to events such as car washing and rainfall, and fogging is likely to occur on the inner surface of the light-transmitting member. According to the lamp unit 1a, fogging of the inner surface of the light-transmitting member is unlikely to occur, and even if fogging occurs, it is easy to effectively eliminate the fogging, so the lamp unit 1a can improve the value of the vehicle equipped with the lamp unit 1a.

[0065] The lamp unit 1a may be a lamp unit for a headlamp, a lamp unit for a small lamp, a lamp unit for a fog lamp, or a lamp unit for a brake lamp.

[0066] Example

[0067] Hereinafter, the present invention will be described in further detail by way of examples, but the present invention is not limited to the following examples.

[0068] <Example 1A>

[0069] Water is poured into the interior of the headlamp C of Chery Tiggo 8 so as to fill the entire space inside the headlamp C. Based on the above V = (W2-W1) / ρ w The internal volume V of the headlamp C is determined by the relationship between the internal volume V of the headlamp C and the internal volume V of the headlamp C. As a result, the internal volume V of the headlamp C is 9400 cm 2 All valves installed on the housing of the headlamp C are removed and dried in an environment of 80°C for 24 hours. The headlamp can be dried under other conditions as long as the inside of the headlamp is fully dried. For example, the headlamp can be dried in an environment of 50°C for a week.

[0070] The dried headlamp C is transferred to a thermostat and hygrostat maintained at a temperature of 40°C and a relative humidity of 90% and left to stand for 24 hours to perform humidity control on the headlamp C. The headlamp C is taken out of the thermostat and hygrostat and placed in an environment of a temperature of 20°C and a relative humidity of 65% for 1 hour to replace the air inside the headlamp C. The suction port of FLEXTAILGEAR's portable small pump TINY PUMP X is covered with a breathable membrane to obtain the pump involved in the embodiment. The pump has a maximum discharge pressure of 3.5 kPa. The breathable membrane is fixed to the pump with a double-sided adhesive tape. The air permeability coefficient of the breathable membrane is 0.01204 cm 3 / (Pa·sec·cm 2 ). The permeability coefficient is calculated by dividing the air volume [cm2] obtained by the Frazier-type method (A) in JIS L 1096:2010 3 / (cm 2 · seconds)] divided by the pressure indicated by the tilt-type barometer of the Frazier tester, 125 Pa. The opening formed on the upper left of the back of the headlamp C and the discharge port of the pump involved in the embodiment are connected by a flow path component including a polyvinyl chloride tube. A pressure gauge and a valve are installed in the middle of the flow path component. The opening formed on the side of the housing of the headlamp C, which is located at the lower right when viewed from the back of the headlamp C, is covered with a vent film a. The air permeability coefficient P of the vent film a is 0.01204 cm 3 / (Pa·sec·cm 2 The permeability coefficient P of the air permeable membrane is calculated by converting the air volume [cm 3 / (cm 2 · seconds)] divided by the pressure indicated by the inclined barometer of the Frazier tester, 125 Pa. The permeation area A of the air-permeable membrane a is 20.43 cm 2 In this manner, the lamp unit according to Example 1A was manufactured. Figure 5A This is a photo of the front of the headlight of Chery Tiggo 8. Figure 5B This is a photo of the underside of the headlight. Figure 5C The following are photos of the back side of the lamp unit according to Example 1A. In these photos, the area surrounded by dotted lines near the symbol "p" indicates the position of the opening connected to the discharge port of the pump, and the area surrounded by dotted lines near the symbol "m" indicates the position of the opening covered with the vent membrane.

[0071] <Example 1B>

[0072] The lamp unit according to Example 1B was produced in the same manner as Example 1A except that the air-permeable membrane b was used instead of the air-permeable membrane a. The transmittance coefficient P of the air-permeable membrane b was 0.00127 cm 3 / (Pa·sec·cm 2 ).

[0073] <Comparative Example 1>

[0074] A lamp unit according to Comparative Example 1 was produced in the same manner as in Example 1A, except that the pump according to the example was not connected and the headlamp was sealed without using the air-permeable membrane a.

[0075] <Example 2A>

[0076] Water is poured into the interior of the headlamp G of Geely Emgrand X7 in such a manner as to fill the entire space inside the headlamp G. Based on the above V=(W2-W1) / ρ w The internal volume V of the headlamp G is determined by the relationship between the internal volume V of the headlamp G and the internal volume V of the headlamp G. As a result, the internal volume V of the headlamp G is 8000cm 2 All valves installed on the housing of the headlamp G were removed and dried in an environment of 80°C for 24 hours.

[0077] The dried headlamp G is transferred to a thermostat that maintains a temperature of 40°C and a relative humidity of 90% and is left to stand for 24 hours to perform humidity control on the headlamp G. The headlamp G is taken out of the thermostat and placed in an environment of 20°C and a relative humidity of 65% for 1 hour to replace the air inside the headlamp G. The opening formed at the left end of the back side of the headlamp G and the discharge port of the pump involved in the embodiment are connected by a flow path component including a tube made of polyvinyl chloride. A pressure gauge and a valve are installed in the middle of the flow path component. The opening formed in the housing of the headlamp G located at the right end when viewed from the back side of the headlamp G is covered with a vent membrane a. The permeable area A of the vent membrane a is 33.18 cm 2 In this manner, the lamp unit according to Example 2A was manufactured. Fig. 6A This is a photo of the front of the Geely Emgrand X7's headlight. Figure 6B This is a photo of the back of the headlight. Figure 6C 2A are photographs of the back side of the lamp unit according to Example 2A. In these photographs, the area surrounded by dotted lines near the symbol "p" indicates the position of the opening connected to the discharge port of the pump, and the area surrounded by dotted lines near the symbol "m" indicates the position of the opening covered with the vent membrane.

[0078] <Example 2B>

[0079] In addition to changing the permeable area A of the vent membrane a to 2.85 cm 2 The lamp unit according to Example 2B was produced in the same manner as in Example 2A except for the above.

[0080] <Comparative Example 2>

[0081] A lamp unit according to Comparative Example 2 was produced in the same manner as in Example 2A, except that the pump according to the example was not connected and the headlamp was sealed without using the air-permeable membrane a.

[0082] <Example 3A>

[0083] Water is poured into the interior of the headlamp (headlamp F) of Ford Escape so as to fill the entire space inside the headlamp F. Based on the above V=(W2-W1) / ρ w The internal space volume V of the headlamp F is determined by the relationship between the internal space volume V of the headlamp F of the Ford Edge. As a result, the internal space volume V of the headlamp F of the Ford Edge is 13400cm 2 All valves installed on the housing of the headlamp F were removed and dried in an environment of 80°C for 24 hours.

[0084] The dried headlamp F is transferred to a thermostat maintained at a temperature of 40°C and a relative humidity of 90% and left to stand for 24 hours to perform humidity control on the headlamp F. The headlamp F is taken out of the thermostat and placed in an environment of 20°C and a relative humidity of 65% for 1 hour to replace the air inside the headlamp F. The opening formed at the lower right end of the back side of the headlamp F and the discharge port of the pump involved in the embodiment are connected by a flow path component including a tube made of polyvinyl chloride. A pressure gauge is installed midway in the flow path component. The opening formed in the housing of the headlamp F located at the upper left end when viewed from the back side of the headlamp F is covered with a vent membrane a. The permeable area A of the vent membrane a is 20.43 cm 2 In this manner, the lamp unit according to Example 3A was manufactured. Fig. 7A This is a photo of the front of the Ford Edge's headlight. Figure 7B This is a photo of the back of the headlight. Figure 7C 3A are photographs of the back side of the lamp unit involved in Example 3A. In these photographs, the area surrounded by dotted lines near the symbol "p" indicates the position of the opening connected to the discharge port of the pump, and the area surrounded by dotted lines near the symbol "m" indicates the position of the opening covered with the vent membrane.

[0085] <Example 3B>

[0086] In addition to changing the permeable area A of the vent membrane a to 10.21 cm 2 The lamp unit according to Example 3B was produced in the same manner as in Example 3A except for the above.

[0087] <Example 3C>

[0088] Except that the air-permeable membrane b is used instead of the air-permeable membrane a and the permeable area A of the air-permeable membrane b is adjusted to 38.48 cm 2 The lamp unit according to Example 3C was produced in the same manner as in Example 3A except for the above. The permeability coefficient P of the air-permeable membrane b was 0.00127 cm 3 / (Pa·sec·cm 2 ).

[0089] <Example 3D>

[0090] In addition to changing the permeable area A of the vent membrane a to 2.10 cm 2 The lamp unit according to Example 3D was produced in the same manner as in Example 3A except for the above.

[0091] <Comparative Example 3>

[0092] A lamp unit according to Comparative Example 3 was produced in the same manner as in Example 3A, except that the pump according to the example was not connected and the headlamp was sealed without using the air-permeable membrane a.

[0093] [Evaluation of ventilation performance]

[0094] The ventilation performance was evaluated using each lamp unit of the embodiment and the comparative example. After each lamp unit was manufactured, it was placed in an environment with a temperature of 20°C and a relative humidity of 65%, and 8 beam lamps were set on the front of the lens of each lamp unit. As the beam lamp, a beam lamp BRF110V120W 150 type diffuse light type manufactured by Asahi Electric Industry Co., Ltd. was used. The distance between each lamp unit and the 8 beam lamps was adjusted to about 700 mm. The 8 beam lamps were lit, and the light from the 8 beam lamps was irradiated to each lamp unit for 2 hours. From the lighting of the 8 beam lamps, the temperature of the lens surface of each lamp unit rose, and after about 60 minutes from the lighting of the 8 beam lamps, the temperature of the lens surface of each lamp unit was maintained at about 40 to 60°C. It should be noted that as long as each lamp unit is warmed up in this way, each lamp unit can also be warmed up by a method other than the method of using a beam lamp in the evaluation of ventilation performance.

[0095] When the lamp unit involved in each embodiment is used to evaluate the ventilation performance, the pump in the lamp unit is started at the timing when the power of the beam lamp is turned off in order to turn off the beam lamp. Water is discharged to the surface of the lens of each lamp unit for 90 seconds at a predetermined timing after the power of the beam lamp is turned off. The temperature of the water used for the discharge is about 11°C. After the discharge of water, the presence or absence of fogging on the lens surface is confirmed. If fogging is confirmed, the time T required for the fogging to disappear is measured. It should be noted that in the case of no fogging, this time is determined to be 0 minutes. In the pump unit involved in each embodiment, the pump is started at the timing when the power of the beam lamp is turned off, and the pump is operated according to the following mode I or mode II. The pressure p inside the lamp unit housing during the pump operation is read from the pressure gauge. The pressure p is a gauge pressure. Table 1 shows the pump unit used in each evaluation, the pump operation mode, the pressure p [kPa] inside the lamp unit housing during the pump operation, the pump discharge time t [seconds], and the time T [minutes] required for the fogging to disappear. Figure 8 Graphs 1 and 2 show the relationship between the time T required for fogging to disappear in each evaluation and the value of 1000·p·t·P·A / V.

[0096] Mode I: The pump is operated for a predetermined discharge time t before the water is discharged, and the pump is stopped immediately before the water is discharged.

[0097] Mode II: The pump is operated during the water discharge process, and the pump is stopped after 1 minute has passed from the start of the water discharge.

[0098] As shown in Table 1, the time T in the evaluation of the ventilation performance using the pump unit involved in each embodiment (Evaluation No. 1 to 14) is shorter than the time T in the evaluation of the ventilation performance using the pump unit involved in Comparative Examples 1 to 3 (Evaluation No. 15 to 17). Therefore, it is understood that the pump unit involved in each embodiment can exert better ventilation performance than the pump unit involved in Comparative Examples 1 to 3.

[0099] according to Figure 8 , it is understood that when the condition of 1000·p·t·P·A / V≥3.0 is met, fogging does not occur or fogging on the lens surface is eliminated in a very short time.

[0100] A first aspect of the present invention provides a lamp unit comprising: A main body shell, comprising a light-transmitting component, a main body wall connected to the light-transmitting component and forming a shell, a first opening portion and a second opening portion located on the main body wall and forming an opening communicating with an external space of the shell; A light source is disposed inside the main housing; and The pump has a gas ejection port connected to the first opening.

[0101] A second aspect of the present invention provides a lamp unit according to the first aspect, wherein: The lamp unit further includes a ventilation member for ventilation between the main body housing and the external space. The ventilation component is arranged at the second opening.

[0102] A third aspect of the present invention provides a lamp unit according to the first aspect or the second aspect, wherein: The pump has a maximum discharge pressure of 0.5 to 20.0 kPa.

[0103] A fourth aspect of the present invention provides a lamp unit according to the second aspect, wherein: The main body housing, the pump, and the ventilation member are a combination that satisfies the following equations (Ia) and (Ib). 1000p·t·P·A / V≥3.0 (Ia) 0<t≤300 (Ib) In the above conditions, p is the pressure inside the main body housing when the pump is operating [kPa], t is the discharge time of the pump [seconds], and P is the air permeability coefficient of the ventilation member [cm 3 / (Pa·sec·cm 2 )], A is the permeation area of ​​the ventilation component [cm 2 ], V is the internal volume of the lamp unit [cm 3 ].

[0104] A fifth aspect of the present invention provides a lamp unit according to the second aspect, wherein: The air permeability coefficient of the ventilation component is 0.00008~0.80293cm 3 / (Pa·sec·cm 2 ).

[0105] A sixth aspect of the present invention provides a lamp unit according to the second aspect, wherein: The permeability area of ​​the ventilation component is 0.03142~50.26548cm 2 .

[0106] A seventh aspect of the present invention provides a lamp unit according to any one of the first to sixth aspects, wherein: The internal volume of the lamp unit is 1000-20000cm 3 .

[0107] An eighth aspect of the present invention provides a lamp unit according to any one of the first to seventh aspects, wherein: The lamp unit is for a vehicle.

[0108] A ninth aspect of the present invention provides a ventilation method, which is a ventilation method for a main body shell of a lamp, wherein: The lamp comprises a lamp unit, The lamp unit comprises: The main body shell has a light-transmitting component, a main body wall connected to the light-transmitting component and forming a shell, a first opening portion and a second opening portion located on the main body wall and forming an opening communicating with an external space of the shell; A light source is disposed inside the main body shell; a pump having a gas outlet connected to the first opening; and a ventilation component, used for ventilation between the main body shell and the external space, The ventilation method includes the pump ejecting gas toward the main body casing in a manner satisfying the following conditions: 1000p·t·P·A / V≥3.0 (IIa) 0<t≤300 (IIb) In the above conditions, p is the pressure inside the main body housing when the pump is operating [kPa], t is the discharge time of the pump [seconds], and P is the air permeability coefficient of the ventilation member [cm 3 / (Pa·sec·cm 2 )], A is the permeation area of ​​the ventilation component [cm 2 ], V is the internal volume of the lamp unit [cm 3 ].

[0109]

Table 1

Claims

1. A lamp unit comprising: A main body shell, comprising a light-transmitting component, a main body wall connected to the light-transmitting component and forming a shell, a first opening portion and a second opening portion located on the main body wall and forming an opening communicating with an external space of the shell; A light source is disposed inside the main housing; and The pump has a gas ejection port connected to the first opening.

2. The lamp unit according to claim 1, wherein The lamp unit further includes a ventilation member for ventilation between the main body housing and the external space. The ventilation component is arranged at the second opening.

3. The lamp unit according to claim 1, wherein: The pump has a maximum discharge pressure of 0.5 to 20.0 kPa.

4. The lamp unit according to claim 2, wherein: The main body housing, the pump, and the ventilation member are a combination that satisfies the following equations (Ia) and (Ib). 1000p·t·P·A / V≥3.0 (Ia) 0<t≤300 (Ib) In the above conditions, p is the pressure inside the main body housing when the pump is operating [kPa], t is the discharge time of the pump [seconds], and P is the air permeability coefficient of the ventilation member [cm 3 / (Pa·sec·cm 2 )], A is the permeation area of ​​the ventilation component [cm 2 ], V is the internal volume of the lamp unit [cm 3 ].

5. The lamp unit according to claim 2, wherein: The air permeability coefficient of the ventilation component is 0.00008~0.80293cm 3 / (Pa·sec·cm 2 ).

6. The lamp unit according to claim 2, wherein: The permeability area of ​​the ventilation component is 0.03142~50.26548cm 2 .

7. The lamp unit according to claim 1, wherein: The internal volume of the lamp unit is 1000-20000cm 3 .

8. The lamp unit according to claim 1, wherein The lamp unit is for a vehicle.

9. A ventilation method, which is a ventilation method for a main body shell of a lamp, wherein: The lamp comprises a lamp unit, The lamp unit comprises: The main body shell has a light-transmitting component, a main body wall connected to the light-transmitting component and forming a shell, a first opening portion and a second opening portion located on the main body wall and forming an opening communicating with an external space of the shell; A light source is disposed inside the main body shell; a pump having a gas outlet connected to the first opening; as well as a ventilation component, used for ventilation between the main body shell and the external space, The ventilation method includes the pump ejecting gas toward the main body casing in a manner satisfying the following conditions: 1000p·t·P·A / V≥3.0 (IIa) 0<t≤300 (IIb) In the above conditions, p is the pressure inside the main body housing when the pump is operating [kPa], t is the discharge time of the pump [seconds], and P is the air permeability coefficient of the ventilation member [cm 3 / (Pa·sec·cm 2 )], A is the permeation area of ​​the ventilation component [cm 2 ], V is the internal volume of the lamp unit [cm 3 ].

Images