Car lamp drying device

By designing a headlight drying device, the humidity condition is directly judged using a changeable desiccant and a visual part, the problem that cannot be discovered in time when the desiccant fails in the prior art is solved, preventing fogging in the headlights from being too high, and improving the normal use of the headlights and driving safety.

CN222864756UActive Publication Date: 2025-05-13LYNWAY VISION TECH (NB) CO LTD
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Patent Information

Application Number
CN202421979847.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-08-15
Publication Date
2025-05-13
Estimated Expiration
2034-08-15

AI Technical Summary

Technical Problem

LED headlights are prone to temperature differences in cold environments or long-term use, causing the water vapor inside the headlight to condense into water droplets visible to the naked eye, forming mist, affecting lighting efficiency and driving safety. The prior art is difficult to identify desiccant failure in time, resulting in excessive humidity in the car lights and fogging.

Method used

设计了一种车灯干燥装置,包括第一壳体、第二壳体和可视部,通过在第一容纳槽中放置可变色干燥剂,使得通过可视部能直接查看到干燥剂的变化,判断当前车灯内的湿度情况。 At the same time, a third housing and a seal are provided to improve the overall sealing and practicality.

Benefits of technology

Directly judge the humidity condition by changing the color-changing desiccant, avoiding the inability to detect the desiccant in time when the desiccant fails, preventing the excessive humidity in the car lights from causing fog, and improving the normal use of the car lights and driving safety. At the same time, the sealing and practicality of the headlight drying device are improved.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a car lamp drying device which comprises a first shell, a second shell, a third shell and a fourth shell, the first shell is provided with a first containing cavity, and a drying agent is arranged in the first containing cavity; the second shell is connected with the first shell in a matched manner, and the second shell is provided with a visible part; the first containing groove is formed in the first shell, the first containing groove and the visual part are correspondingly arranged, and a color-changeable drying agent is further arranged in the first containing groove; the third shell is arranged on the side, away from the second shell, of the first shell; and the sealing element is arranged on the first shell. According to the utility model, the state of the drying agent can be identified more conveniently, and the structure is simpler.
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Description

Technical Field

[0001] The utility model relates to the technical field of vehicle lamps, in particular to a vehicle lamp drying device. Background Art

[0002] As an important part of the car, headlights are not only related to driving safety, but also one of the highlights of the car's exterior design. From traditional halogen headlights to technologically innovative xenon headlights, to the widely used LED headlights today.

[0003] However, LED headlights are known for their compact and highly integrated complex design structure. While this feature optimizes performance, it also creates certain obstacles to the smooth flow of air inside the headlights. Therefore, when encountering cold environments, long-term continuous use, or encountering significant seasonal temperature fluctuations, significant temperature differences are likely to form inside the headlights. This temperature difference effect causes the water vapor originally present in the headlight mask to condense and transform into visible water droplets, forming fog inside the headlight. This phenomenon not only weakens the lighting efficiency and clarity of the headlight, but also may interfere with the driver's field of vision, thus posing a hidden danger to driving safety that cannot be ignored, and may also have a negative impact on the overall aesthetics of the vehicle.

[0004] At present, the common method to solve the fogging of car lights on the market is to put physical desiccants such as magnesium oxide, silica gel and mineral desiccants or chemical desiccants such as magnesium chloride and calcium chloride into the car lights to keep the internal environment of the car lights dry. However, desiccants have a time limit, and often the desiccant is not known to have expired until the car lights fog up. Summary of the invention

[0005] Therefore, the embodiment of the utility model provides a lamp drying device, which can more conveniently identify the state of the desiccant and has a simpler structure.

[0006] In order to solve the above problems, the utility model provides a lamp drying device, which includes: a first shell, the shell is provided with a first accommodating chamber, and the first accommodating chamber is provided with a desiccant; a second shell, the second shell and the first shell are cooperatively connected, and the second shell is provided with a visible portion; a first accommodating groove, the first accommodating groove is provided in the first shell, the first accommodating groove and the visible portion are correspondingly provided, and the first accommodating groove is also provided with a color-changing desiccant; a third shell, the third shell is provided on a side of the first shell away from the second shell; and a sealing member is provided on the first shell.

[0007] Compared with the prior art, the technical effect achieved by adopting the technical scheme is as follows: a first shell is provided to accommodate the desiccant, so that the desiccant can be protected by the first shell, and a second shell is provided to cooperate with and connect the first shell, and a visible portion is provided, and a first accommodating groove is provided correspondingly under the visible portion, and a color-changing desiccant is placed in the first accommodating groove, so that the change of the color-changing desiccant can be directly viewed through the visible portion, and the change of the color-changing desiccant can be directly judged through the change of the color-changing desiccant, so as to avoid the failure of the desiccant to be discovered in time, thereby causing excessive humidity in the lamp, causing fogging, and affecting the normal use of the lamp, and a third shell and a sealing member are provided, so that the overall lamp drying device has stronger sealing performance, and the sealing performance can also be improved after the lamp drying device is installed on the lamp, thereby improving the overall practicality.

[0008] In one example of the utility model, the lamp drying device further includes: a matching groove, which is arranged on a side of the first shell close to the second shell; a connecting member, which is arranged on the second shell, and the connecting member and the matching groove are embedded and matched to fix the second shell to the first shell.

[0009] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: by setting a mating groove on the first shell, and by embedding and mating with a connecting piece set on the second shell, the second shell and the first shell are fixed. Through this connection method, the convenience of assembly is improved, and installation can be more convenient. At the same time, the mating groove can provide an installation positioning point, further improving the efficiency of installation, making the overall practicality better.

[0010] In one example of the utility model, the lamp drying device is installed on the air vent of the lamp housing, and the lamp drying device also includes: a matching piece, which is arranged on the first housing, and the matching piece cooperates with the air vent to fix the lamp drying device to the air vent.

[0011] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: by setting a matching piece on the first shell, and then through the matching piece and the air vent, the car lamp drying device can be more conveniently installed on the air vent, thereby improving the efficiency of disassembly and installation. At the same time, the installation method is simpler, the structure is simpler, and the fixing effect is good, avoiding detachment, thereby improving the practicality of the car lamp drying device and the convenience of disassembly and assembly.

[0012] In an example of the present invention, the first shell further includes: a first fixing member; a first supporting member, the first supporting member is arranged around the first fixing member; and a plurality of protrusions, the plurality of protrusions connecting the first fixing member and the first supporting member.

[0013] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: by arranging the first supporting member on the first fixing member, and arranging a plurality of protrusions to connect the first supporting member and the first fixing member, so that when installing and disassembling the lamp drying device and the air vent, force can be applied with the help of the protrusions, and the installation and disassembly of the lamp drying device can be carried out more conveniently, thereby improving the efficiency of assembly and disassembly.

[0014] In an example of the present utility model, the first shell further includes: a first air vent, the first air vent is provided on the first fixing member, and the first air vent is connected to the first accommodating cavity.

[0015] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: by arranging the first air vent on the first fixing member, and arranging the first air vent to connect with the first accommodating cavity, the circulation of internal moisture can be realized, and the moisture can pass through the desiccant better and then be discharged by the first air vent, thereby improving the internal air circulation capacity, avoiding accumulation, and improving the overall dehumidification capacity.

[0016] In an example of the utility model, the lamp drying device further includes: a second air hole, which is arranged on the second shell; and a first air permeable member, which is arranged to cover the second air hole.

[0017] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: by setting a second air hole in the second shell and setting a first air permeable member to cover the second air hole, it is possible to prevent external dust and other debris from entering the interior of the lamp drying device through the second air hole, and to achieve air circulation between the lamp drying device and the outside, thereby better discharging moisture inside the lamp and improving the dryness of the interior of the lamp.

[0018] In an example of the utility model, the lamp drying device further includes: the desiccant is provided with a first notch, and the first notch is used to accommodate a part of the color-changing desiccant.

[0019] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: by setting the desiccant with a first notch, and the color-changing desiccant part is arranged in the first notch, through this arrangement, when the desiccant fails, the color-changing desiccant can be changed color at the first time, so that the failure of the desiccant can be obtained more quickly. At the same time, the setting of the first notch makes the overall internal space utilization higher, and also reduces the amount of color-changing desiccant used, thereby reducing costs.

[0020] In one example of the utility model, the lamp drying device further includes: a moisture permeable membrane, which is arranged between the desiccant and the third shell, and the moisture permeable membrane and the desiccant are provided with corresponding second and third notches; and the second and third notches are arranged correspondingly to the first air hole.

[0021] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: by arranging a moisture-permeable membrane between the desiccant and the third shell, the desiccant can be protected by the moisture-permeable membrane to avoid being disturbed by dust and other debris, and the entry of moisture will not be blocked, thereby improving the practicality of the overall lamp drying device; at the same time, by arranging corresponding second notches and third notches, an air flow channel is formed corresponding to the first air hole, so that moisture can be better discharged, thereby improving the dryness of the interior of the lamp.

[0022] In one example of the utility model, the lamp drying device further includes: a guide protrusion, which is arranged on the third shell; a third air vent, which is arranged on one side of the third shell close to the guide protrusion, and the gas enters the guide protrusion through the third air vent.

[0023] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: by arranging the guide protrusion on the third shell and arranging the third air vent to connect to the outside, the moisture can enter the guide protrusion through the third air vent and can better prolong the contact time between the moisture and the desiccant, so as to better absorb the moisture and reduce the humidity inside the lamp, thereby preventing the lamp from fogging and affecting the normal use of the lamp, thereby improving the practicality of the lamp drying device.

[0024] After adopting the technical solution of the utility model, the following technical effects can be achieved:

[0025] (1) The first shell is provided to contain the desiccant, so that the desiccant can be protected by the first shell. The second shell is provided to cooperate with and connect the first shell, and a visible portion is provided. A first receiving groove is provided corresponding to the visible portion. The color-changing desiccant is placed in the first receiving groove, so that the change of the color-changing desiccant can be directly viewed through the visible portion, so that the humidity condition in the current headlight can be directly judged through the change of the color-changing desiccant, so as to avoid the failure of the desiccant to be discovered in time, resulting in excessive humidity in the headlight, causing fogging and affecting the normal use of the headlight. The third shell and the sealing member are provided, so that the sealing property of the overall headlight drying device is stronger, and the sealing property can be improved after the headlight drying device is installed on the headlight, so as to improve the overall practicality.

[0026] (2) By arranging the matching piece on the first shell, and then cooperating with the vent hole, the lamp drying device can be more conveniently installed on the vent hole, thereby improving the efficiency of disassembly and installation. At the same time, the installation method is simpler, the structure is simpler, and the fixing effect is good, avoiding the situation of separation, thereby improving the practicality and convenience of disassembly and assembly of the lamp drying device;

[0027] (3) By providing the desiccant with a first notch, and the color-changing desiccant portion being provided in the first notch, the color-changing desiccant can be changed color immediately when the desiccant fails, thereby enabling the desiccant failure to be detected more quickly. At the same time, the provision of the first notch increases the overall space utilization rate of the interior, reduces the amount of color-changing desiccant used, and reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings to be used in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 A schematic diagram of the structure of a lamp drying device provided by an embodiment of the utility model;

[0030] Figure 2 An exploded schematic diagram of a lamp drying device provided by an embodiment of the utility model;

[0031] Figure 3 One of the partial structural schematic diagrams of a lamp drying device provided by an embodiment of the utility model;

[0032] Figure 4 A second partial structural diagram of a lamp drying device provided by an embodiment of the utility model;

[0033] Figure 5 A third partial structural diagram of a lamp drying device provided by an embodiment of the utility model;

[0034] Figure 6 The fourth partial structural schematic diagram of a lamp drying device provided in an embodiment of the utility model.

[0035] Description of reference numerals:

[0036] 100. Lamp drying device; 1. First air permeable member; 2. Second shell; 3. First shell; 4. Sealing member; 5. Color-changing desiccant; 6. Desiccant; 7. Moisture-permeable membrane; 8. Third shell; 9. Visible portion; 10. First accommodating groove; 11. Matching groove; 12. Connecting member; 13. Matching member; 14. First fixing member; 15. First supporting member; 16. Raised portion; 17. First air hole; 18. Second air hole; 19. First air permeable member; 20. First notch; 21. Second notch; 22. Third notch. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the technical solutions in the embodiments of the utility model are described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] [First embodiment]

[0039] See also Figure 1-Figure 3 The utility model provides a lamp drying device 100, which includes: a first shell 3, the shell is provided with a first accommodating cavity, and a desiccant 6 is provided in the first accommodating cavity; a second shell 2, the second shell 2 and the first shell 3 are cooperatively connected, and the second shell 2 is provided with a visible portion 9; a first accommodating groove 10, the first accommodating groove 10 is provided in the first shell 3, the first accommodating groove 10 and the visible portion 9 are correspondingly provided, and a color-changing desiccant 65 is also provided in the first accommodating groove 10; a third shell 8, the third shell 8 is provided on a side of the first shell 3 away from the second shell 2; a sealing member 4, the sealing member 4 is provided in the first shell 3.

[0040] Specifically, when installing the lamp drying device 100, first install the first air permeable member 191 onto the second air permeable hole 18, wherein the first air permeable member 191 can be a breathable film, and the breathable film is attached to the second air permeable hole 18 for fixing, and the second air permeable hole 18 is used as an outlet to remove internal moisture.

[0041] Furthermore, the color-changing desiccant 65 is placed in the first receiving groove 10 on the first shell 3, and then the connecting piece 12 on the second shell 2 is matched and connected with the matching groove 11 on the first shell 3. The connection method can be fixed by snapping or plugging.

[0042] Furthermore, the desiccant 6 is placed inside the first accommodating chamber, wherein an isolating piece is provided inside the first accommodating chamber to divide the desiccant 6 into four parts, and a corresponding first notch 20 is provided on the desiccant 6 to correspond to the first accommodating groove 10, so that the color-changing desiccant 65 can contact the desiccant 6 and be partially accommodated in the first notch 20, so that when the desiccant 6 fails, the color-changing desiccant 65 can react in time and be recognized by the visible portion 9, wherein the visible portion 9 is transparent.

[0043] Furthermore, the moisture-permeable membrane 7 is applied under the desiccant 6 and the first shell 3 to facilitate moisture discharge, and then the third shell 8 is welded to the first shell 3. The guide protrusion 16 provided on the third shell 8 can be a maze-shaped setting to facilitate moisture circulation inside, so that the desiccant 6 can absorb moisture more fully.

[0044] Furthermore, the lamp drying device 100 is rotatably connected to the air vent of the lamp by means of a fitting 13 and a base arranged on the air vent, and the connection method may be a threaded connection or a snap-fit ​​connection.

[0045] Preferably, a first shell 3 is provided to accommodate the desiccant 6, so that the desiccant 6 can be protected by the first shell 3, and a second shell 2 is provided to cooperate with the first shell 3, and a visible portion 9 is provided, and a first receiving groove 10 is correspondingly provided under the visible portion 9, and a color-changing desiccant 65 is placed in the first receiving groove 10, so that the change of the color-changing desiccant 65 can be directly viewed through the visible portion 9, and the change of the color-changing desiccant 65 can be directly judged by the change of the color-changing desiccant 65, so as to avoid the failure of the desiccant 6 to be discovered in time, resulting in excessive humidity in the lamp, causing fogging, and affecting the normal use of the lamp, and a third shell 8 and a seal 4 are provided, so that the overall lamp drying device 100 has stronger sealing, and the sealing can also be improved after the lamp drying device 100 is installed on the lamp, thereby improving the overall practicality.

[0046] Specifically, the lamp drying device 100 also includes: a mating groove 11, which is arranged on a side of the first shell 3 close to the second shell 2; a connecting member 12, which is arranged on the second shell 2, and the connecting member 12 and the mating groove 11 are embedded and matched to fix the second shell 2 to the first shell 3.

[0047] Preferably, a mating groove 11 is provided on the first shell 3, and a connecting piece 12 is provided on the second shell 2 to be embedded and matched with the mating groove 11, so that the second shell 2 and the first shell 3 are fixed. Through this connection method, the convenience of assembly is improved and installation can be more convenient. At the same time, the mating groove 11 can provide an installation positioning point, which further improves the efficiency of installation and makes the overall practicality better.

[0048] Specifically, the lamp drying device 100 is installed on the air vent of the lamp housing, and the lamp drying device 100 further includes: a fitting 13, which is arranged on the first housing 3, and the fitting 13 cooperates with the air vent to fix the lamp drying device 100 on the air vent.

[0049] Preferably, by arranging the fitting 13 on the first shell 3, and then by the fitting 13 cooperating with the air vent, the lamp drying device 100 can be more conveniently installed on the air vent, thereby improving the efficiency of disassembly and installation. At the same time, the installation method is simpler, the structure is simpler, and the fixing effect is good, avoiding detachment, thereby improving the practicality and convenience of disassembly and assembly of the lamp drying device 100.

[0050] Specifically, the first housing 3 further includes: a first fixing member 14 ; a first supporting member 15 , the first supporting member 15 being disposed around the first fixing member 14 ; and a plurality of protrusions 16 , the plurality of protrusions 16 connecting the first fixing member 14 and the first supporting member 15 .

[0051] Preferably, by arranging the first supporting member 15 on the first fixing member 14 and arranging a plurality of protrusions 16 to connect the first supporting member 15 and the first fixing member 14, force can be applied with the help of the protrusions during installation and disassembly between the lamp drying device 100 and the air vent, which makes installation and disassembly of the lamp drying device 100 more convenient and improves the efficiency of assembly and disassembly.

[0052] Specifically, the first shell 3 further includes: a first vent hole 17 , which is disposed on the first fixing member 14 , and is connected to the first accommodating cavity.

[0053] Preferably, by arranging the first air hole 17 on the first fixing member 14 and arranging the first air hole 17 to connect to the first accommodating cavity, the circulation of internal moisture can be achieved, and the moisture can better pass through the desiccant 6 and then be discharged by the first air hole 17, thereby improving the internal air circulation capacity, avoiding accumulation, and improving the overall dehumidification capacity.

[0054] Specifically, the lamp drying device 100 further includes: a second air hole 18 , which is disposed in the second shell 2 ; and a first air permeable member 191 , which is disposed to cover the second air hole 18 .

[0055] Preferably, by providing a second air hole 18 in the second shell 2 and providing a first air permeable member 191 covering the second air hole 18, it is possible to prevent external dust and other debris from entering the interior of the lamp drying device 100 through the second air hole 18, and to enable air circulation between the lamp drying device 100 and the outside, thereby better discharging moisture from the interior of the lamp and improving the dryness of the interior of the lamp.

[0056] Specifically, the lamp drying device 100 further includes: the desiccant 6 is provided with a first notch 20 , and the first notch 20 is used to accommodate a part of the color-changing desiccant 65 .

[0057] Preferably, the desiccant 6 is provided with a first notch 20, and the color-changing desiccant 65 is partially provided in the first notch 20. This arrangement allows the color-changing desiccant 65 to change color immediately when the desiccant 6 fails, thereby enabling the failure of the desiccant 6 to be detected more quickly. At the same time, the arrangement of the first notch 20 allows for a higher overall space utilization rate inside, and also reduces the amount of color-changing desiccant 65 used, thereby reducing costs.

[0058] Specifically, the lamp drying device 100 further includes: a moisture permeable membrane 7, which is arranged between the desiccant 6 and the third shell 8, and the moisture permeable membrane 7 and the desiccant 6 are provided with corresponding second notches 21 and third notches 22; and the second notches 21 and third notches 22 are arranged corresponding to the first air holes 17.

[0059] Preferably, by arranging a moisture-permeable membrane 7 between the desiccant 6 and the third shell 8, the desiccant 6 can be protected by the moisture-permeable membrane 7 to avoid being disturbed by dust and other debris, and the entry of moisture will not be blocked, thereby improving the practicality of the overall lamp drying device 100. At the same time, by arranging the corresponding second notch 21 and the third notch 22, an air flow channel is formed corresponding to the first air vent 17, so that moisture can be better discharged, thereby improving the dryness of the interior of the lamp.

[0060] Specifically, the lamp drying device 100 also includes: a guide protrusion 16, which is arranged on the third shell 8; a third air vent, which is arranged on one side of the third shell 8 close to the guide protrusion 16, and the gas enters the guide protrusion 16 through the third air vent.

[0061] Preferably, by arranging the guide protrusion 16 on the third shell 8 and arranging the third air hole to connect to the outside, the moisture can enter the guide protrusion 16 through the third air hole, which can better prolong the contact time between the moisture and the desiccant 6, and can better absorb the moisture, thereby reducing the humidity inside the car lamp, thereby preventing the car lamp from fogging and affecting the normal use of the car lamp, thereby improving the practicality of the car lamp drying device 100.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A lamp drying device, characterized in that: The lamp drying device comprises: A first shell (3), the shell being provided with a first accommodating chamber, wherein a desiccant (6) is arranged in the first accommodating chamber; A second shell (2), the second shell (2) and the first shell (3) are connected in a cooperative manner, and the second shell (2) is provided with a visible portion (9); A first containing groove (10), the first containing groove (10) being arranged in the first shell (3), the first containing groove (10) and the visible portion (9) being arranged correspondingly, and a color-changeable desiccant (5) being further arranged in the first containing groove (10); a third shell (8), the third shell (8) being arranged on a side of the first shell (3) away from the second shell (2); A sealing member (4), wherein the sealing member (4) is arranged on the first shell (3).

2. The lamp drying device according to claim 1, characterized in that: The lamp drying device further comprises: A matching groove (11), the matching groove (11) being arranged on a side of the first shell (3) close to the second shell (2); A connecting piece (12) is provided on the second shell (2), and the connecting piece (12) and the matching groove (11) are embedded and matched, so that the second shell (2) is fixed to the first shell (3).

3. The lamp drying device according to claim 1, characterized in that: The lamp drying device is mounted on the air vent of the lamp housing, and the lamp drying device further comprises: A matching piece (13), the matching piece (13) is arranged on the first shell (3), and the matching piece (13) cooperates with the air vent so that the vehicle lamp drying device is fixed to the air vent.

4. The lamp drying device according to claim 1, characterized in that: The first housing (3) further comprises: A first fixing member (14); A first supporting member (15), wherein the first supporting member (15) is disposed around the first fixing member (14); A plurality of protrusions (16), wherein the plurality of protrusions (16) connect the first fixing member (14) and the first supporting member (15).

5. The lamp drying device according to claim 4, characterized in that: The first housing (3) further comprises: A first air vent (17), wherein the first air vent (17) is disposed on the first fixing member (14), and the first air vent (17) is connected to the first accommodating cavity.

6. The lamp drying device according to claim 1, characterized in that: The lamp drying device further comprises: A second air vent (18), the second air vent (18) being arranged on the second shell (2); A first air permeable member (19) (1), wherein the first air permeable member (19) (1) covers the second air permeable hole (18).

7. The lamp drying device according to claim 1, characterized in that: The lamp drying device further comprises: The desiccant (6) is provided with a first notch (20), and the first notch (20) is used to accommodate part of the color-changeable desiccant (5).

8. The lamp drying device according to claim 5, characterized in that: The lamp drying device further comprises: A moisture permeable membrane (7), the moisture permeable membrane (7) being arranged between the desiccant (6) and the third shell (8), and the moisture permeable membrane (7) and the desiccant (6) being provided with a second notch (21) and a third notch (22) which are arranged correspondingly; Furthermore, the second notch (21) and the third notch (22) are arranged corresponding to the first vent hole (17).

9. The lamp drying device according to claim 1, characterized in that: The lamp drying device further comprises: A guide protrusion (16), wherein the guide protrusion (16) is arranged on the third shell (8); A third air vent is provided on a side of the third shell (8) close to the guide protrusion (16), and gas enters the guide protrusion (16) through the third air vent.