Moisture-absorbing device for the light fixture and this light fixture

Abstract

Moisture-absorbing device for a luminaire, comprising a moisture-absorbing body (10) having a closed cover (11), a surrounding wall (12) and a receiving chamber (13), wherein the cover (11) defines a central axis (A), wherein the surrounding wall (12) extends around this central axis (A) and surrounds the receiving chamber (13), wherein the receiving chamber (13) forms an opening (14), wherein the cover (11) closes the side of the receiving chamber facing away from the opening (14) in order to prevent the opening (14) and the receiving chamber (13) from coming into contact with the environment; a moisture absorption unit (20) which is in powder form and is filled into the receiving chamber (13); and a first air-permeable membrane (30) which removably closes the opening (14) of the receiving chamber (13).

Description

Technical field

[0001] The invention relates to moisture absorption, in particular a moisture-absorbing device for a lamp and this lamp. State of the art

[0002] When luminaires are installed or used in high ambient humidity, for example due to rain or damp weather, moisture can easily penetrate the luminaire housing and condense on the casing or translucent parts. This impairs the lighting effect and shortens the luminaire's lifespan. To solve this problem, the casing is usually fitted with a ventilation hole or an air-permeable membrane (e.g., breathable fabric) is attached to the casing. Air convection equalizes the internal and external pressure and dissipates the internal moisture.

[0003] However, since the moisture permeability of the breathable material is limited, moisture accumulation inside the light fixture cannot be effectively prevented. Condensation easily occurs when exposed to light or temperature changes. This leads to fogging of the fixture's surface and detracts from its appearance. In severe cases, excessive moisture inside the fixture can even damage the internal electronic components.

[0004] Therefore, it is necessary to provide a novel and advanced moisture-absorbing device for the luminaire and this luminaire in order to solve the aforementioned problems. Object of the invention

[0005] The object of the invention is to provide a moisture-absorbing device for a lamp and this lamp, wherein the moisture-absorbing device can be easily and quickly replaced and mounted in a lamp and has the moisture-absorbing function.

[0006] This task is achieved by the moisture-absorbing device for a luminaire, which comprises: a moisture-absorbing body having a closed lid, a surrounding wall, and a receiving chamber, wherein the lid defines a central axis, the surrounding wall extending around this central axis and surrounding the receiving chamber, the receiving chamber forming an opening, the lid closing the side of the receiving chamber facing away from the opening to prevent communication between the opening and the receiving chamber with the environment; a moisture-absorbing unit in powder form which is filled into the receiving chamber; and a first air-permeable membrane which removably closes the opening of the receiving chamber.

[0007] This task is further achieved by the luminaire, which comprises: a luminaire body having a lampshade and a luminaire housing, wherein the lampshade covers the luminaire housing and forms an interior space with it, wherein the luminaire housing has a ventilation hole and a mounting section, wherein the ventilation hole connects the interior space with the environment, wherein the moisture-absorbing device for the luminaire is detachably attached to the mounting section, the opening and the receiving space communicating with the interior space; and a second air-permeable membrane that detachably closes the ventilation hole. Brief description of the drawings Fig. 1 a perspective view of the first embodiment of the invention, Fig. 2 an exploded view of the first embodiment of the invention, Fig. 3 a sectional view of the first embodiment of the invention, Fig. 4 an enlarged representation according to Fig. 3, Fig. 5 a further enlarged representation according to Fig. 3, Fig. 6 a representation of the blocking projections and blocks of the lamp housing in the blocked state of the first embodiment of the invention, Fig. 7 a representation of the blocking projections and blocks of the lamp housing in the unblocked state of the first embodiment of the invention, Fig. 8 a perspective view of the second embodiment of the invention, Fig. 9 an exploded view of the second embodiment of the invention, Fig. 10 a sectional view of the second embodiment of the invention, Fig. 11 a sectional view of the third embodiment of the invention. Ways to implement the invention

[0008] The following embodiments serve only to illustrate the possible implementation of this invention and are not intended to limit its scope. The term "one" or "at least one" before the nouns mentioned in the article does not restrict the quantity. A "plural" is also possible, as needed. Changes to this number are also within the scope of protection of the invention.

[0009] Fig. Figures 1 to 7 show a first embodiment of the invention. The moisture-absorbing device 1 for a luminaire of the invention comprises: a moisture-absorbing body 10, a moisture-absorbing unit 20, and a first air-permeable membrane 30.

[0010] The moisture-absorbing body 10 has a closed lid 11, a surrounding wall 12, and a receiving chamber 13. The lid 11 defines a central axis A. The surrounding wall 12 extends around this central axis A and surrounds the receiving chamber 13. The receiving chamber 13 forms an opening 14. The lid 11 closes the side of the receiving chamber facing away from the opening 14 to prevent contact between the opening 14 and the receiving chamber 13 with the environment. In the present embodiment, the lid 11 and the surrounding wall 12 are formed in one piece. The moisture-absorbing unit 20 is in powder form and is filled into the receiving chamber 13. In the present embodiment, the moisture-absorbing unit 20 contains silicone gel, aluminosilicate, calcium chloride (CaCl₂), magnesium chloride (MgCl₂), a moisture-absorbing polymer resin, or any combination of these substances.The first air-permeable membrane 30 removably closes the opening 14 of the receiving chamber 13.

[0011] This allows for removable mounting in a luminaire housing 51 and effectively absorbs the moisture generated inside the luminaire 50. This prevents condensation of moisture on the inner wall or the optical components of the luminaire 50. The closed cover 11 prevents convection between the receiving chamber 13 of the luminaire housing 51 and the surrounding environment, thus preventing direct penetration of moisture from the outside into this chamber. This allows the moisture absorption unit 20 to absorb the moisture in the luminaire housing 51 over a longer period, which stabilizes the drying effect and extends the service life of the moisture absorption unit 20.

[0012] The diameter of the pores of the first air-permeable membrane 30 is larger than that of an air molecule but smaller than that of a liquid molecule. The particle size of the powder particle is larger than the diameter of the pores. In the present embodiment, the diameter of the pores of the first air-permeable membrane 30 is less than 100.00 µm (micrometers). Therefore, the first air-permeable membrane 30 is moisture-permeable but simultaneously waterproof, preventing water penetration. It also prevents the moisture absorption unit 20 from falling out of the receiving chamber 13. In the present embodiment, the first air-permeable membrane 30 adheres to the moisture absorption body 10. The first air-permeable membrane 30 is provided with an adhesive layer for bonding to the moisture absorption body 10. The adhesive layer can consist of a high-tack adhesive.For example, the adhesive layer can be an applied or bonded pressure-sensitive adhesive (PSA) that provides a strong bond and is removable. This ensures that the first air-permeable membrane 30 adheres firmly to the moisture-absorbing body 10 and can be easily removed from the moisture-absorbing body if necessary. Therefore, subsequent replacement of the moisture-absorbing unit 20 or the first air-permeable membrane 30 is facilitated, making the moisture-absorbing device 1 reusable.

[0013] The axial dimension L of the surrounding wall 12 is larger than the outer diameter D of the cover 11. Preferably, the axial dimension L of the surrounding wall 12 is larger than 1.3 times the outer diameter D of the cover 11. This creates a larger receiving space 13 that can accommodate more moisture absorption units 20. This increases the overall moisture absorption capacity and the duration of action, and extends the moisture absorption cycle. Furthermore, the moisture absorption body 10 is positioned deep within the luminaire body 51, and the moisture absorption unit 20 is located closer to the area of ​​concentrated moisture, enabling it to adsorb the water vapor molecules generated within the luminaire body 51 more quickly.

[0014] A rotary knob 15 is provided on the outside of the cover 11. The rotary knob 15 extends radially along the cover 11 and passes through the central axis A. The user can grip the rotary knob 15 with their fingers and exert force on the cover 11. This creates a balanced torque that allows for smooth rotation of the cover 11, thus ensuring quick assembly and disassembly without slippage or loosening. Preferably, the outer diameter D of the cover 11 is larger than the outer diameter of the surrounding wall 12. A ring flange 17 projects radially outwards from the cover 11, enabling effortless rotation of the cover 11 and covering the gap between it and the luminaire 50.

[0015] Preferably, several radially projecting locking projections 16 are provided on the outer circumferential surface of the surrounding wall 12, arranged around the central axis A. The locking projections 16 are located far from the opening 14. The moisture-absorbing device 10 is inserted into the luminaire body 51 and can be set between an unlocking position ( Fig. 7) and a locking position ( Fig. 6) can be rotated, whereby the locking projections 16 and the lamp body 51 lock each other in the direction of the central axis A and cannot be separated. By rotating in the opposite direction, the device can be quickly unlocked and disassembled, enabling fast assembly and disassembly.

[0016] The moisture-absorbing device for the luminaire also includes a sealing ring 40, which is attached to the surrounding wall 12 and is located between the blocking projections 16 and the cover 11. It rests against the inner wall of the luminaire body 51 to seal the luminaire body 51.

[0017] The present invention also provides a luminaire comprising a moisture-absorbing device as described above. The luminaire further comprises a luminaire body 51 and a second air-permeable membrane 70.

[0018] The luminaire body 51 consists of a lampshade 52 and a luminaire housing 53. The lampshade 52 covers the luminaire housing 53, forming an interior space 56. The luminaire housing 53 has a ventilation hole 54 and a mounting section 55. The ventilation hole 54 connects the interior space 56 to the environment. The moisture-absorbing device for the luminaire is removable and attached to the mounting section 55. The opening 14 and the receiving space 13 communicate with the interior space 56. The second air-permeable membrane 70 removablely closes the ventilation hole 54.

[0019] More precisely, the second air-permeable membrane 70 allows water vapor to pass through while simultaneously providing a waterproof effect that prevents the penetration of liquid water.

[0020] The ventilation hole 54 serves to create air convection between the interior 56 of the luminaire body 51 and the environment. Through this convection, moisture in the luminaire body 51 is naturally drawn to the ventilation hole 54 and subsequently discharged through the second air-permeable membrane 70. The cover 11 of the moisture-absorbing device is closed, so that air can only enter from the outside through the ventilation hole 54 and cannot flow in through the moisture-absorbing device. This improves the overall efficiency of moisture absorption and removal.

[0021] Preferably, the mounting section 55 is provided with a through-hole 64. One end of the moisture-absorbing device is inserted through the through-hole 64 into the interior 56. A stop 57 projects from the luminaire housing 53 into the interior 56. Several radially projecting blocking projections 16 are provided on the outer circumferential surface of the surrounding wall 12, spaced apart around the central axis A. The moisture-absorbing body 10 defines a circumferential direction P extending around the central axis A. At least one blocking projection 16 can be blocked in the circumferential direction P by the stop 57. More precisely, the shape of the through-hole 64 corresponds approximately to the radial cross-section of the blocking projections 16 and the surrounding wall 12. Fig. 6) By rotating the moisture absorber body 10, the blocking projections 16 can be locked in the direction of the central axis A of the luminaire housing 53 to prevent it from falling out. Locking it against the stop 57 also ensures that the moisture-absorbing device does not rotate excessively ( Fig. 7).

[0022] The luminaire body 51 further comprises a circuit board 58, which is arranged in the luminaire housing 53. The circuit board 58 has a through-hole 59 through which one end of the moisture-absorbing device is guided. The opening 14 is located between the circuit board 58 and the luminaire housing 53. The circuit board 58 is also equipped with several light elements 80. Moisture in the area of ​​the circuit board 58 and at the connection point between the luminaire housing 53 and the lampshade 52 can be absorbed directly, so that the light elements 80 and the electronic components are effectively protected from moisture damage.

[0023] Fig. Figures 8 to 10 show the second embodiment of the invention. The moisture-absorbing device for the luminaire further comprises at least one (or more) sealing rings 40. The outer circumferential surface of the surrounding wall 12a of the moisture-absorbing body 10a is provided with several annular grooves 18. These annular grooves 18 are spaced apart along the direction of the central axis A. The at least one (or two) sealing rings 40 are received in one of the annular grooves 18. Specifically, the mounting section 55a forms a seat 60 projecting into the interior 56. The seat 60 has a receiving recess 61 and a through-hole 62. The through-hole 62 connects the receiving recess 61 to the interior 56. The moisture-absorbing device is arranged in the receiving recess 61, and its opening 14 is connected to the through-hole 62.

[0024] The sealing rings 40 fit radially against a wall 63 of the receiving recess 61 to prevent moisture from the interior 56 from penetrating to the outside through the gap between the moisture-absorbing device and the seat 60. By simply inserting the moisture-absorbing device into the receiving recess 61, the sealing rings 40 ensure airtightness and positioning, enabling quick and convenient disassembly and assembly while maintaining excellent airtightness. There are at least four annular grooves 18 and at least two sealing rings 40. This configuration can be modularly adapted to different luminaire sizes; for example, with a shorter seat 60a ( Fig. 11) the position of the sealing rings 40 in the annular grooves 18 is changed accordingly to achieve a flexible configuration and a stable seal.

[0025] In summary, the moisture-absorbing device for a lamp according to the present invention, through the moisture absorption unit 20 arranged in the moisture absorption body 10 and the first air-permeable membrane 30 attached to the opening, brings the moisture generated inside the lamp 50 into contact with the moisture absorption unit 20 via the first air-permeable membrane, thereby adsorbing and dissipating the moisture. The moisture-absorbing device for a lamp according to the present invention also features a plate-shaped rotary knob 15, which extends outwards from the cover 11 of the moisture absorption body 10 and whose length corresponds approximately to the length of a finger joint.This allows the user to easily and quickly replace the moisture absorption body 10 by pinching it with the tips (first joints) of their thumb and forefinger and then twisting or pulling it straight out. This enables ordinary drivers to purchase the present invention and perform the replacement themselves to keep the vehicle light dry. Reference symbol list 10, 10a Moisture absorption body 11 lids 12,12a Perimeter wall 13 Recording Room 14 Opening 15 rotary knob 16 Blocking advantage 17 Ring flange 18 Ring-shaped groove 20 moisture absorption units 30 First air-permeable membrane 40 sealing rings 50 light 51 light fixtures 52 Lampshade 53 light housings 54 ventilation hole 55, 55a Assembly section 56 Interior 57 attack 58 circuit boards 59 Through hole 60.60a Seat 61. Admission exemption 62 Through hole 63 Wall 64 Through hole 70 Second air-permeable membrane 80 lighting elements A central axis D Outer diameter P Circumferential direction L Axial dimension

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