A dehumidifying device for repairing a vehicle lamp

Abstract

The utility model discloses a kind of dehumidification devices for vehicle light repair, including hot air machine, circulating pipeline, expansion joint and the sensor for monitoring lamp body internal environment. The circulating pipeline of device is composed of hot air outlet section, low-temperature air inlet section and return air circulation section, wherein low-temperature air inlet pipeline is attached with hot air pipe outside, return air circulation pipeline is attached with low-temperature pipe arrangement, for recycling exhaust heat, so that the airflow entering the lamp body is fully preheated before heating. Sensor can be deeply into lamp body internal from return air side, for real-time detection of deep humidity and temperature, so as to adjust hot air output. Expansion joint can be replaced according to the size of different vehicle light air vent, suitable for on-site processing or original vehicle interface scene. After dehumidification, interface can be removed and air vent is closed, so that the lamp body remains dry, solves the problem of heat waste, humidity monitoring inaccuracy, wet air backflow and interface not universal in existing mode.

Description

Technical Field

[0001] This utility model relates to the field of automotive repair equipment technology, specifically a dehumidification device for vehicle headlight repair. Background Technology

[0002] As the sealing structure of automotive lamps becomes increasingly complex, vehicles are prone to internal dampness, fogging, and even water accumulation after prolonged use or in environments exposed to water, rain, or snow. This can affect brightness and potentially lead to risks such as lamp wick oxidation and damp wiring connections. In actual repair scenarios, a common practice is to use an external heat source to heat the inside of the lamp, causing moisture to evaporate and escape through pre-drilled holes. However, due to the simplistic heating method and the lack of a sealed air duct, heat utilization is low, requiring continuous high-power operation to achieve dehumidification, resulting in high energy consumption. Furthermore, traditional dehumidification methods mostly directly expel the hot, humid air evaporated from inside the lamp without recovering the heat it contains, further reducing thermal efficiency.

[0003] Furthermore, existing dehumidification tools generally rely on shallow measuring points near the lamp body interface to monitor humidity and temperature, which is difficult to accurately reflect the true condition deep inside the lamp body. This can easily lead to a situation where the outside is dry but the inside remains damp, thus affecting the judgment of whether dehumidification is complete. The ventilation hole sizes of lamp bodies vary greatly among different vehicle models, and some vehicles do not even have a pre-installed interface. Repair personnel often need to temporarily modify or use methods such as sealing with tape to create ventilation openings, but the sealing effect is unstable, which can easily lead to air leakage and backflow, reducing dehumidification efficiency. At the same time, some existing air duct structures are prone to deformation of flexible pipes during heating, and backflow moisture can be easily re-drawn in during circulation, which can also lead to unstable circulating air quality, affecting the drying speed and temperature uniformity inside the lamp body.

[0004] In summary, existing dehumidification methods for vehicle lights generally suffer from significant heat waste, inaccurate humidity monitoring, potential moisture backflow, poor interface compatibility, and insufficient air duct stability. There is an urgent need for a dehumidification device for vehicle light repair that can improve thermal energy utilization efficiency, accurately monitor humidity deep within the lamp body, and be compatible with different lamp body structures. Utility Model Content

[0005] The purpose of this invention is to provide a dehumidification device for vehicle headlight repair, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a dehumidification device for vehicle headlight repair, comprising a hot air blower, a circulation pipeline, an expansion joint, and a sensor. The hot air blower is used to input hot air into the headlight to be repaired to remove moisture from inside the headlight. The circulation pipeline includes a hot air outlet pipeline, a low-temperature air inlet pipeline, and a return air circulation pipeline. The low-temperature air inlet pipeline is preheated by the hot air outlet pipeline and recovers heat from the return air circulation pipeline. The end of the hot air outlet pipeline is equipped with an air outlet connector, and the end of the return air circulation pipeline is equipped with a return air connector. The ends of the air outlet connector and the return air connector are respectively equipped with connectors, which are positioned relative to the connector of the headlight to be repaired. The top of the return air connector has an insertion port, and the sensor penetrates the return air connector and the connector and is inserted into the internal cavity of the headlight to be repaired. The sensor monitors the internal data of the headlight to be repaired.

[0007] Preferably, the hot air blower includes a main unit, the main unit is equipped with a heating element and a fan, the fan is equipped with an air outlet pipe at the air outlet end and an air inlet pipe at the air inlet end.

[0008] Preferably, the host has a heat dissipation vent on its exterior for heat dissipation of the internal control module.

[0009] Preferably, the lamp to be repaired includes a lamp body, the outer side of which is integrally formed with a lamp cover, and a ventilation opening is provided at the top of the lamp body.

[0010] Preferably, the hot air outlet duct includes a hot air pipe connected to the outlet duct, and a flexible outlet hose is connected to the outside of the hot air pipe, with the end of the outlet hose fixed to the input end of the outlet connector.

[0011] Preferably, the low-temperature air intake pipe includes a low-temperature pipe that is connected to the air intake pipe, and a preheating circulation pipe is connected to the end of the low-temperature pipe. The preheating circulation pipe is wrapped around the outer wall of the hot air pipe.

[0012] Preferably, the return air circulation pipeline includes a flexible return air hose connected to the return air connector, and a recovery circulation pipe is connected to the outside of the return air hose, the recovery circulation pipe being wound around the outer wall of the low temperature pipe.

[0013] Preferably, the expansion joint includes a mating part, a connector is fitted on the outer side of the mating part, and an expansion part with a replaceable diameter is fitted between the connector and the mating part.

[0014] Preferably, the sensor includes a plug rod, with a connecting wire harness at the top end of the plug rod and a sensing head at the bottom end of the plug rod.

[0015] Preferably, the insertion rod and the socket are sealed together, the sensor head monitors at least two or more data points, namely humidity and temperature, in real time, and the connecting harness is electrically connected to the hot air blower.

[0016] Compared with existing technologies, the advantages of this invention are as follows: This invention forms a preheating structure by connecting the low-temperature intake pipe and the outer wall of the hot air pipe, while simultaneously ensuring the return air circulation pipe is aligned with the low-temperature pipe, thus reusing the exhaust heat and allowing the air entering the lamp body to achieve stable temperature rise without increasing additional energy consumption. The return air section only handles waste heat recovery, while moisture is directly discharged through the return air connector, preventing it from re-entering the intake side circulation, thereby creating a cleaner and more efficient hot air path. Sensors can reach deep into the lamp body to collect real humidity data, allowing the control module to automatically adjust the heating amount based on the data, ensuring the temperature does not exceed limits and preventing lamp body deformation. The expansion connector has interchangeable diameters, and even if the vent is machined on-site, a reliable seal can be formed through screw connections, enhancing adaptability. The circulation pipe is primarily a rigid structure to maintain duct stability, while heat-resistant flexible tubing is used at necessary locations for angle compensation. After dehumidification, the interface can be quickly disconnected and the vent sealed, keeping the lamp body dry. This device has achieved significant improvements in heat energy utilization, temperature control, and interface compatibility, solving problems such as heat waste, inaccurate humidity monitoring, moisture recirculation, and incompatible interfaces in existing methods. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the forward structure of the present invention in use.

[0018] Figure 2 This is a schematic diagram of the rear structure of the present invention in use.

[0019] Figure 3 This is a bottom structural diagram of the present invention in use.

[0020] Figure 4 This is a schematic diagram of the forward assembly of this utility model.

[0021] Figure 5 This is a schematic diagram of the rear assembly of this utility model.

[0022] Figure 6 This is a schematic diagram of the bottom assembly of this utility model.

[0023] In the diagram: 1. Hot air blower, 11. Main unit, 12. Suction pipe, 13. Exhaust pipe, 14. Heat dissipation port, 2. Light waiting for maintenance, 21. Lamp body, 22. Lamp cover, 23. Ventilation port, 3. Circulation pipeline, 31. Hot air pipe, 32. Low temperature pipe, 33. Preheating circulation pipe, 34. Return air hose, 35. Recycle circulation pipe, 36. Exhaust air hose, 37. Return air connector, 38. Exhaust air connector, 4. Expansion connector, 41. Connecting piece, 42. Expansion piece, 43. Connector, 44. Butt connector, 5. Sensor, 51. Insert rod, 52. Sensor head, 53. Connecting wire harness. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-6 This utility model provides a technical solution: a dehumidification device for vehicle headlight repair, including a hot air blower 1, a circulation pipe 3, an expansion connector 4, and a sensor 5. The hot air blower 1 is used to input hot air into the headlight 2 to remove moisture from inside the headlight 2. The circulation pipe 3 includes a hot air outlet pipe, a low-temperature air inlet pipe, and a return air circulation pipe. The low-temperature air inlet pipe is preheated by the hot air outlet pipe and recovers heat from the return air circulation pipe. The end of the hot air outlet pipe is equipped with an outlet connector 38, and the end of the return air circulation pipe is equipped with a return air connector 37. The ends of the outlet connector 38 and the return air connector 37 are respectively equipped with connectors 44, which are positioned relative to the connector of the headlight 2. The top of the return air connector 37 has an insertion port. The sensor 5 passes through the return air connector 37 and the connector 44 and is inserted into the internal cavity of the headlight 2 to monitor the internal data of the headlight 2.

[0026] Specifically, in actual use, a dehumidification device for vehicle headlight repair involves the repair personnel first determining a suitable expansion connector 4 based on the structure of the headlight 2 to be repaired. The diameter of the expansion piece 42, connector 43, and mating connector 44 is adjusted to be approximately the same size as the headlight ventilation hole. Then, the hot air blower 1 is connected to the power supply via a power cord. The connection of each section of rigid pipe in the circulation pipe 3 (hot air outlet pipe, low-temperature air intake pipe, and return air circulation pipe) and the outlet hose 36 and return hose 34 is checked for secureness. It is ensured that the outlet connector 38 and return connector 37 can be smoothly inserted into the headlight body interface. After installation, insert or screw the connector 44 into the pre-drilled or on-site ventilation hole of the lamp 2 to be repaired. Secure the interface with a threaded lock or compression mechanism. Then, insert the probe 51 of the sensor 5 through the insertion port at the top of the return air connector 37, allowing the sensor head 52 to extend into the lamp body to a position further away from the interface, enabling the collection of temperature and humidity data deep within the lamp body. After installation, start the hot air blower 1, causing the internal heating element to operate and drive the blower to rotate. Hot air flows along the air outlet pipe 13, hot air pipe 31, and air outlet hose 36 to the air outlet connector 38 and enters the interior of the lamp 2 to be repaired. The cavity is emptied, and the humid air inside the lamp body is drawn back through the return air connector 37 and return air hose 34, forming a closed loop through the circulation pipe 3. Maintenance personnel can set the target temperature range and airflow through the control panel of the hot air blower 1 to maintain the internal temperature of the lamp body within a safe range suitable for dehumidification without causing lamp housing deformation or rubber strip aging. Initially, ventilation can continue for several minutes to promote significant evaporation of moisture. Subsequently, the sensor 5 reads the humidity and temperature changes inside the lamp body in real time. Once the humidity value drops below the preset threshold and remains stable near that threshold for a set period of time, the process continues... Maintain moderate heating for a short period to ensure that residual moisture in corners and crevices is completely dissipated. Then, turn off the heating unit and fan in sequence. When the airflow gradually weakens to the point of almost stopping, the maintenance personnel quickly loosen the connection structure and pull the connector 44 and sensor 5 out of the ventilation hole. Immediately use nuts, metal plugs, or the original structure of the vehicle light to seal the ventilation hole. This restores the sealing state of the lamp body in a timely manner after the dehumidification operation is completed, preventing external moisture from invading again. The whole process forms a continuous operation procedure from installation, heating and dehumidification, real-time monitoring, heat preservation and stabilization to the removal of the seal.

[0027] Specifically, the hot air blower 1 includes a main unit 11, which is equipped with a heating element and a fan. The fan's outlet end is equipped with an air outlet pipe 13, and the fan's inlet end is equipped with an air intake pipe 12.

[0028] Specifically, the hot air blower 1 includes a main unit 11, inside which heating elements and a fan assembly are sequentially assembled. A control module for monitoring the overall operation is located within the main unit 11. This control module is connected to the heating elements for adjusting heating power and is also electrically linked to the fan speed control unit to ensure that the hot air output temperature does not exceed a preset safety limit. The heating elements typically consist of a chip PTC, resistance wire, or ceramic heating unit, used to rapidly increase the outlet air temperature after power is applied. The fan assembly is installed at its rear end, continuously delivering hot air to the hot air duct 31 through the outlet duct 13 and providing pressure drive for the entire circulation pipeline 3. The control module has a temperature sensing interface, an adjustable power control circuit, and over-temperature power-off logic. After the hot air blower 1 starts operating, maintenance personnel set the target temperature range through the external control panel. The control module automatically adjusts the output of the heating elements based on the real-time temperature signal collected internally, stabilizing the temperature near the outlet duct 13 within a safe range and preventing localized temperature increases due to heat accumulation by adjusting the fan speed.

[0029] In practical use, maintenance personnel first power on the main unit 11 and put it into preheating mode. The control module starts the heating element with low power and only allows the fan to run at the set speed after confirming that the temperature rise is stable, so as to avoid sudden high-temperature airflow blowing directly into the lamp body. In the initial dehumidification stage, the control module will perform small-scale compensation heating on the heating element according to the temperature change of the airflow drawn back by the suction pipe 12, so that the temperature difference between the air outlet and the return air end is kept in a suitable range for evaporating water vapor. When the sensor 5 detects that the internal temperature of the lamp body is close to the target value, the control module will automatically reduce the heating power so that the air outlet temperature does not exceed the maximum limit allowed by the lamp body structure, thereby preventing the lamp cover 22, lamp body 21 or internal rubber strip from softening due to overheating. During continuous dehumidification, if an abnormal increase in the air outlet temperature or return air temperature is detected, the control module will immediately trigger the over-temperature protection logic, reduce the fan speed and cut off the power output of the heating element in stages, so that the main unit 11 returns to a safe cooling state. In addition, during the later stages of dehumidification, as the humidity inside the lamp gradually decreases, the control module will adjust the heating element to a constant temperature and low power to maintain stable warm air, so that the lamp maintains a small amount of heat to facilitate the complete evaporation of residual moisture. Only after the sensor 5 continuously reports stable temperature and humidity will the fan be allowed to enter the deceleration and shutdown procedure, so that the entire heating and dehumidification process is completed under safe and controlled conditions.

[0030] Specifically, the host 11 has a heat dissipation vent 14 on its exterior for heat dissipation of the internal control module.

[0031] Specifically, the main unit 11 is equipped with a heat dissipation vent 14 on its exterior to expel excess heat generated by the internal control module and heating elements during prolonged operation of the hot air blower 1, keeping the casing within a safe touch temperature range. The heat dissipation vent 14 is typically designed as an elongated strip or a multi-hole array, usually located on the side wall or rear end of the main unit 11. This allows the fan assembly to utilize the slight negative pressure created internally to naturally carry away heat. The edges of the heat dissipation vent 14 are generally reinforced with thickened ribs, or made of high-temperature resistant ABS, modified PC, or aluminum alloy to prevent deformation of the vent under high temperatures, which could affect stable ventilation within the main unit 11. Before using the device, maintenance personnel will perform a simple inspection of the heat dissipation vent 14 to ensure that the ventilation holes are not blocked by dust, lint, or other debris, ensuring smooth airflow. During dehumidification, the heat dissipation vent 14 will simultaneously generate a slight amount of hot air discharge along with the operation of the heating elements and the fan; this is an important way for the control module to automatically balance the internal heat load.

[0032] When the hot air blower 1 continuously outputs hot air to the lamp 2 under maintenance, the control module monitors the internal temperature of the unit in real time and automatically adjusts the heat dissipation intensity. For example, while controlling the power reduction of the heating element, it accelerates the change in fan power, thereby creating a higher flow rate of exhaust air near the heat dissipation vent 14, preventing the control module from becoming unstable due to excessive internal load. In cases where dehumidification operation lasts for a long time (e.g., when dealing with a severely damp lamp 21), the heat dissipation vent 14 can also provide additional heat dissipation buffering capacity for the main unit 11, keeping the outer casing temperature stable during long-term operation. Maintenance personnel can touch or move the main unit 11 at any time during operation without getting burned. After dehumidification is completed, as the hot air blower 1 enters the deceleration, cooling, and eventually shutdown buffering program, the heat dissipation vent 14 will continue to release residual heat for a period of time, maintaining a relatively gradual temperature drop inside the main unit 11. This helps extend the service life of internal electronic components and heating modules, thus ensuring the long-term stability of the entire dehumidification system.

[0033] Specifically, the lamp to be repaired 2 includes a lamp body 21, with a lamp cover 22 integrally formed on the outer side of the lamp body 21, and a ventilation opening 23 at the top of the lamp body 21.

[0034] Specifically, the lamp 2 under maintenance typically comprises an integral structure of a lamp body 21 and a lamp cover 22. The lamp body 21 is the main part forming a closed cavity inside, and is often made of heat-resistant engineering plastic materials such as PC, PBT, or aluminum to ensure it can withstand the continuous temperature output by the hot air blower 1 during dehumidification. The lamp cover 22 is integrally molded with the lamp body 21 or bonded with a sealing strip. Its transparent area is often made of PC transparent plastic or glass to maintain optical light transmission. A vent 23 is usually provided at the top of the lamp body 21. The vent 23 can be a pre-installed structure on the vehicle or can be drilled on-site as needed during maintenance. The drilling method can use a metal hole saw, a step drill, or an electric drill. After the hole wall is machined, tapping is performed so that the thread can be quickly fitted with the connector 44 or metal threaded tube for installation. The diameter of the vent 23 is usually selected based on the available installation space inside the lamp body 21 and the expected dehumidification efficiency to ensure that the air outlet connector 38 and the return air connector 37 can form a stable seal at this location and maintain airflow circulation inside the lamp body.

[0035] In practice, maintenance personnel will first clean the area around the vent 23 to ensure that there is no oil, water, or dust in the area, so as to ensure a reliable fit when the connector 44 is inserted. If the vent 23 is created on-site, the hole wall must be cleaned with a clean cloth after processing to prevent debris from being sucked into the circulation pipe 3. During installation, the maintenance personnel will position the connector 43 of the expansion connector 4 at the vent 23 and use screwing, crimping, or snapping to stably insert the connector 44 into the inner cavity of the lamp body 21, while ensuring that the insertion direction of the return air connector 37 faces the maintenance personnel to facilitate the insertion of the sensor 5. After completing the dehumidification task and removing the connector 44, the maintenance personnel will immediately use a pre-prepared plug, metal nut, or original vehicle rubber plug to seal the vent 23, restoring the original airtightness of the lamp body 21, preventing moisture from re-entering the lamp body, thereby maintaining a stable and long-lasting dehumidification effect.

[0036] Specifically, the hot air outlet duct includes a hot air duct 31 that is connected to the outlet duct 13, and a flexible outlet hose 36 is connected to the outside of the hot air duct 31. The end of the outlet hose 36 is fixed to the input end of the outlet connector 38.

[0037] Specifically, the hot air outlet duct in the device mainly consists of an outlet duct 13, a hot air duct 31, and a flexible outlet hose 36 connected in sequence. The hot air duct 31 is directly connected to the outlet duct 13 and is used to withstand the high-temperature airflow generated by the heating element inside the hot air blower 1. Therefore, the hot air duct 31 is usually made of high-temperature resistant metal tubing or modified reinforced nylon tubing to prevent softening, deformation, or cracking during prolonged heating. The outlet hose 36 is connected to the outer end of the hot air duct 31. Its material is mostly high-temperature resistant silicone hose or coated fiber-reinforced hose, which can withstand high outlet temperatures while maintaining flexible bending ability. During assembly, maintenance personnel will adjust the outlet hose 36 to a suitable length according to the vehicle position, so that it can be bent without flattening or obstructing airflow. Finally, the end of the outlet hose 36 is fixed to the input end of the outlet connector 38. The fixing method is mostly external clamping or internal buckle locking, so that the hot airflow can be stably input into the connector 44 and enter the lamp body 21 under pressure.

[0038] In practical use, before turning on the machine, the maintenance personnel will first check the connection interface between the hot air duct 31 and the air outlet hose 36 to ensure that there is no risk of loosening, air leakage, or disconnection. After starting the hot air blower 1, the hot air rises rapidly along the hot air duct 31. When the temperature reaches the set value of the control module and tends to stabilize, it is sent into the air outlet connector 38 through the air outlet hose 36 with stable pressure, and then guided by the connector 44 to the interior of the lamp body 21, so that the temperature can be evenly distributed to the internal moisture-affected area. Since the lamp body structure and position vary in different models, the maintenance personnel usually manually adjust the position of the air outlet hose 36 before dehumidification to prevent it from directly contacting the paint, wiring harness, or other sensitive areas when heated. At the same time, the air outlet hose 36 itself has good anti-scalding properties and can be manually adjusted in position when necessary. During the entire dehumidification process, if the airflow becomes obstructed due to changes in the hose's orientation, maintenance personnel can immediately adjust the bending angle of the outlet hose 36 to restore smooth airflow, thereby ensuring that the hot air duct maintains stable heating and providing sufficient conditions for subsequent humidity monitoring and internal drying.

[0039] Specifically, the low-temperature air intake pipeline includes a low-temperature pipe 32 that is connected to the air intake pipe 12. The end of the low-temperature pipe 32 is connected to a preheating circulation pipe 33, which is wrapped around the outer wall of the hot air pipe 31.

[0040] Specifically, the low-temperature air intake pipe is composed of a suction pipe 12, a low-temperature pipe 32, and a preheating circulation pipe 33 connected in sequence. The suction pipe 12 is installed at the air inlet of the fan assembly and is used to draw air returning from the lamp body 21 through the return air circulation pipe, and then gradually send it into the main unit 11 through the low-temperature pipe 32. The low-temperature pipe 32 is usually made of a rigid plastic pipe resistant to negative pressure or a lightweight aluminum pipe to ensure that it will not shrink or deform due to pressure on the pipe wall during continuous air extraction. The preheating circulation pipe 33 is a rigid coil with flexible winding. The material is generally a thin-walled copper pipe, a stainless steel coil, or a metal corrugated pipe with an insulating and heat-resistant layer on the surface. Its structure allows it to be tightly wound in a spiral manner around the outer wall of the hot air pipe 31 at the outer end of the low-temperature pipe 32, so that the recovered heat can fully preheat the cold air entering the main unit 11 without direct contact.

[0041] In actual operation, maintenance personnel will first connect the low-temperature pipe 32 to the suction pipe 12, confirming that the sealing ring, clamping clamp, or locking structure at the interface is completely closed. Then, the preheating circulation pipe 33 is evenly wound and fixed to the outside of the hot air pipe 31, so that the two form a stable heat exchange relationship. When the hot air blower 1 starts running, the fan assembly draws the airflow returned by the return air connector 37, enters the low-temperature pipe 32 through the return air hose 34, and then travels through the spiral section of the preheating circulation pipe 33. At this time, the residual heat from the outer wall of the hot air pipe 31 will continuously exchange with the low-temperature airflow inside the preheating circulation pipe 33, so that the air temperature at the air inlet gradually increases, reducing the instantaneous load on the heating element. During the continuous dehumidification operation, the control module will make fine adjustments according to the real-time temperature at the suction pipe 12 to maintain a suitable thermal balance between the preheating circulation pipe 33 and the hot air pipe 31, avoiding excessive temperature difference that could cause fluctuations in the fan load. After the sensor 5 reports the trend of decreasing humidity inside the lamp body 21, the preheating circulation pipe 33 continues to maintain the heat recovery function, so that the subsequent input airflow maintains a stable temperature and ensures that the temperature difference of the entire circulation is constant, thereby providing a stable low-temperature replenishment airflow for continuous dehumidification.

[0042] Specifically, the return air circulation pipeline includes a flexible return air hose 34 connected to the return air connector 37, and a recovery circulation pipe 35 is connected to the outside of the return air hose 34. The recovery circulation pipe 35 is wrapped around the outer wall of the low temperature pipe 32.

[0043] Specifically, the return air circulation duct consists of a return air connector 37, a return air hose 34, and a recovery circulation duct 35, arranged sequentially. The return air hose 34 is connected to the rear side of the return air connector 37 and is used to stably guide the hot and humid air extracted from the lamp body 21 back to the main unit 11. Its material is usually a high-temperature resistant silicone hose or a reinforced braided hose, which can withstand a certain temperature and has good flexibility to adapt to the bending routes of different vehicle positions. The recovery circulation duct 35 is set on the outside of the return air hose 34 and is used to attach to or wrap around the outer wall of the low-temperature duct 32 to form a heat exchange structure, thereby recovering the waste heat carried by the return airflow and transferring it to the low-temperature duct 32 during the operation of the hot air blower 1. The recovery circulation duct 35 is generally made of a high-temperature resistant thin-walled metal tube, a stainless steel hose, or a composite rigid tube with a heat-conducting outer layer, so that it can maintain stable thermal conductivity and structural shape under long-term heating conditions.

[0044] In practical use, maintenance personnel will first connect the return air hose 34 to the return air connector 37, confirming that the sealing ring, clamp, or lock at the interface is securely fastened. Then, based on the height and depth of the vehicle lamp body 21 within the vehicle body, the return air hose 34 will be adjusted to a smooth guiding path, ensuring that it is not flattened, broken, or blocked at bends, thus avoiding affecting the return airflow. After confirming the hose path, the maintenance personnel will evenly wrap the recovery circulation pipe 35 around the outside of the low-temperature pipe 32 or fix it with fasteners, ensuring a tight fit between the two to form an effective waste heat recovery structure. When the hot air blower 1 is started, the humid and hot air evaporated from inside the lamp body 21 enters the return air hose 34 through the return air connector 37, and the heat it carries is then transferred to the low-temperature pipe 32 through the recovery circulation pipe 35, allowing the air entering the main unit 11 to receive a partial temperature increase before being heated, which helps to improve the overall dehumidification speed. Throughout the dehumidification process, the control module automatically adjusts the fan suction volume based on the real-time temperature feedback at the suction pipe 12, ensuring stable delivery within the circulation section formed by the return air hose 34 and the recovery circulation pipe 35. When preparing to disassemble after dehumidification, the maintenance personnel will first turn off the hot air blower 1, allowing the airflow in the return air hose 34 to naturally weaken, and then gently twist the return air connector 37 to remove the entire return air circulation pipe assembly, ensuring that the lamp body 21 does not suddenly draw in external moisture, thereby maintaining a stable and reliable dehumidification effect.

[0045] Specifically, the expansion connector 4 includes a mating part 41, a connector 43 is fitted on the outside of the mating part 44, and an expansion part 42 with a replaceable diameter is fitted between the connector 43 and the mating part 41.

[0046] Specifically, the expansion connector 4 is used to adapt to different vehicle models and different lamp body 21 ventilation opening sizes. It consists of a mating part 41, a connector 43, and an expansion part 42 that can be replaced according to the lamp body installation diameter. The mating part 44 is usually fixed at the front end of the expansion connector 4 and is used to directly insert or screw into the ventilation opening 23 to form a stable and sealed interface. The connector 43 and the mating part 41 have a detachable structure, typically using an external thread with an internal thread, a slotted screw thread, or a clamping ring structure for quick replacement. This allows the expansion part 42 to be replaced according to different ventilation opening sizes of the lamp 2 being repaired, avoiding the problem of unsealed interfaces due to inconsistent opening sizes in the lamp body 21. The body of the expansion part 42 is mostly made of heat-resistant nylon, aluminum alloy, or rubber-coated structure. A sealing ring, stepped outer diameter, or flexible sealing sleeve can be installed on its outer side, allowing maintenance personnel to quickly determine the optimal matching diameter on-site and securely fix the expansion connector 4 to the ventilation opening 23 of the lamp body 21 by tightening the connector 43 or by clamping.

[0047] In the specific dehumidification operation, the maintenance personnel first select the appropriate specification of the extension part 42 according to the size of the ventilation opening 23 of the vehicle lamp body 21, and assemble it with the connector 43 to form a complete extension joint 4 with the mating part 41. Then, the mating joint 44 is inserted into the ventilation opening 23 or screwed into the threaded hole wall to form a seal, so that there will be no air leakage, detachment or loosening during the operation of the hot air blower 1. During the installation process, it is necessary to ensure that the outer edge of the extension part 42 fits flat against the outer wall of the lamp body 21 to avoid gaps that may cause air pressure loss. If the ventilation opening 23 is temporarily opened on site, the maintenance personnel will remove the debris from the hole wall before inserting the extension joint 4, and then screw in the metal thread or directly tap the hole wall to make it screwable, so that the extension part 42 can match the thread after entering the hole wall to form a stable support. After dehumidification is complete, when the hot air blower 1 is turned off and enters the cooling stage, the maintenance personnel will use the handle or a slight twist to pull out or unscrew the expansion connector 4 as a whole, and then immediately use a nut, metal plug or the vehicle's original seals to seal the vent 23, thereby keeping the inside of the lamp body 21 dry and preventing external moisture from re-entering.

[0048] Specifically, the sensor 5 includes a plug 51, with a connecting wire harness 53 at the top and a sensor head 52 at the bottom.

[0049] Specifically, sensor 5 is installed in this device to monitor the real humidity and temperature inside the lamp body 21 in real time. Its structure mainly consists of a plug 51, a sensor head 52, and a connecting harness 53. The plug 51 is usually made of high-temperature resistant hard materials, such as glass fiber reinforced nylon, carbon fiber rod, or thin-walled metal tube, to ensure that it can maintain sufficient mechanical strength and shape stability in a high-temperature dehumidification environment. Its length is designed according to the depth of the internal cavity of the lamp body 21 of different vehicle models, so that the sensor head 52 can reach the area near the far end of the lamp body, thereby obtaining more representative environmental parameters. The sensor head 52 is installed at the bottom of the plug 51 and can integrate a humidity probe, a temperature thermistor, or a miniature composite sensor chip. The probe is generally covered with a heat-resistant silicone or metal protective cap to avoid being directly impacted by the high-temperature airflow during dehumidification, which would affect the stability of the reading. The connecting harness 53 is fixed to the upper end of the plug 51. Its outer surface is covered with a heat-resistant insulation layer and is electrically connected to the control module inside the hot air blower 1. It is used to transmit the data collected by the sensor head 52 to the monitoring system on the side of the host 11 in real time.

[0050] In practice, after installing the return air connector 37, the maintenance personnel will slowly push the insertion rod 51 along its top insertion direction, allowing the sensor head 52 to pass through the connector 44 and enter deep inside the lamp body 21. During insertion, it is essential to ensure that the outer surface of the insertion rod 51 reliably fits against the internal sealing part of the return air connector 37 to form a stable sealing structure and prevent air leaks in the return air circulation pipeline. When the hot air blower 1 begins to supply hot air to the lamp body 21, the sensor head 52 can record humidity and temperature changes in real time at the location closest to the deepest part of the lamp body, enabling the control module to dynamically adjust the heating power, fan speed, and circulation flow rate based on the feedback signal. Throughout the dehumidification process, the readings of the sensor 5 will be continuously displayed on the external panel of the hot air blower 1 or on the connected equipment, allowing maintenance personnel to judge the dehumidification progress based on data changes. Once the humidity has stably decreased to a preset threshold and remained there for a period of time, the maintenance personnel can proceed with the shutdown and disassembly procedures. During disassembly, the maintenance personnel first turn off the hot air blower 1, gradually reduce the speed of the blower and stop it, then gently pull out the plug 51 to detach the sensor head 52 from the inside of the lamp body 21, and finally pull out the entire expansion connector 4 from the interface and immediately seal the vent 23, so as to ensure that the lamp body 21 no longer draws in external moisture after dehumidification is completed.

[0051] Specifically, the plug 51 is sealed to the socket, the sensor head 52 monitors at least two or more data points, namely humidity and temperature, in real time, and the connecting harness 53 is electrically connected to the hot air blower 1.

[0052] Specifically, the insertion rod 51 is assembled in a sealed manner at the insertion port, forming a reliable sealing interface after insertion into the return air connector 37. This prevents the leakage of hot and humid air inside the lamp body 21 from the insertion port during circulation. This sealing structure is typically formed using a high-temperature resistant rubber ring, an elastic sealing sleeve, or a stepped compression port, ensuring that the insertion rod 51 remains removable while possessing sufficient lateral stability, preventing loosening due to changes in circulating air pressure. The sensor head 52, as the core measuring component of the sensor 5, typically uses an element with composite monitoring capabilities, enabling real-time acquisition of both humidity and temperature. It maintains measurement accuracy even under the high-temperature environment of continuous operation of the hot air blower 1. Its outer layer is often covered with a heat-resistant protective cover to avoid instantaneous errors caused by thermal shock. The connecting harness 53 extends from the upper end of the insertion rod 51, electrically connecting to the control module inside the hot air blower 1 via a wire with a heat-resistant insulation layer. This allows the data obtained by the sensor head 52 to be instantly fed back to the monitoring system of the main unit 11 for guiding heating and airflow control.

[0053] In practical use, after assembling the expansion connector 4 and the vent 23, the maintenance personnel slowly insert the plug 51 along the insertion direction of the return air connector 37 until the sensor head 52 reaches a deep position inside the lamp body 21, confirming that the sealing structure is completely in place. When the hot air blower 1 starts heating and forms a circulation, the sensor head 52 can continuously record the temperature rise trend and humidity drop in the internal space of the lamp body 21, and transmit the data to the control module in real time, so that it adjusts the power of the heating element, the fan speed, and the circulation speed according to the set logic, thereby ensuring that the lamp body 21 effectively dehumidifies within a safe temperature range. When the humidity reaches the target range and remains stable, the maintenance personnel will turn off the hot air blower 1 according to the shutdown sequence, gradually weakening the circulation, and then pull the plug 51 out of the insertion port, so that the inside of the lamp body 21 is no longer connected to the outside. Finally, the expansion connector 4 is removed and the vent 23 is sealed in time to ensure that the internal cavity of the lamp body after dehumidification is not invaded by external humid air again.

[0054] Specifically, during the heat recovery control process, the control module simultaneously integrates the operating status of the preheating circulation pipe 33 and the recovery circulation pipe 35, as well as the temperature and humidity curves fed back by the sensor 5, to perform group start-stop control on the heating elements. The heating elements can be designed to be divided into several heating units with the same or approximately the same power. Each group of units is connected to the control module by an independent switch module. In the initial stage of dehumidification, all heating units can be turned on to quickly raise the internal temperature of the lamp body 21, allowing the airflow through the hot air pipe 31 to reach the preset target temperature in a short time. As the temperature at the return air connector 37 and the suction pipe 12 gradually increases, the preheating effect of the preheating circulation pipe 33 and the recovery circulation pipe 35 on the low-temperature intake air continuously strengthens. Based on the rate of change of internal temperature and humidity of the lamp body collected by the sensor head 52, the control module gradually turns off some heating units, retaining only the heating units required to maintain the set temperature. By using a two-stage heat recovery system consisting of a preheating circulation tube 33 and a recovery circulation tube 35, the heating element may need to operate continuously at a power of about 2000W for a long time without the heat recovery structure. However, by using a two-stage heat recovery system consisting of a preheating circulation tube 33 and a recovery circulation tube 35, the control module can gradually reduce the heating power to about 1400W to 1500W through group control to maintain the same dehumidification time and final humidity level. The overall power consumption can be reduced by about 25% to 30%. The specific energy saving ratio will vary slightly depending on the ambient temperature, lamp structure and usage time. However, by combining the above group control with heat recovery, the average operating power of the heating element can be effectively reduced while ensuring the dehumidification effect.

[0055] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0056] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A dehumidification device for vehicle headlight repair, comprising a hot air blower (1), a circulation pipeline (3), an expansion connector (4), and a sensor (5), characterized in that: The hot air blower (1) is used to input hot air into the lamp (2) to remove the moisture inside the lamp (2); the circulation pipeline (3) includes a hot air outlet pipeline, a low temperature air inlet pipeline and a return air circulation pipeline. The low temperature air inlet pipeline is preheated by the hot air outlet pipeline and recovers the heat from the return air circulation pipeline. The end of the hot air outlet pipeline is equipped with an air outlet connector (38), and the end of the return air circulation pipeline is equipped with a return air connector (37). The ends of the air outlet connector (38) and the return air connector (37) are respectively equipped with connectors (44). The connectors (44) are positioned relative to the interface of the lamp (2) to be repaired. The top of the return air connector (37) is provided with an insertion port. The sensor (5) is inserted into the cavity inside the lamp (2) through the return air connector (37) and the connector (44). The sensor (5) monitors the data inside the lamp (2).

2. The dehumidification device for vehicle headlight repair according to claim 1, characterized in that: The hot air blower (1) includes a main unit (11), which is equipped with a heating element and a fan. The fan is equipped with an air outlet pipe (13) at the air outlet end and an air inlet pipe (12) at the air inlet end.

3. The dehumidification device for vehicle headlight repair according to claim 2, characterized in that: The host (11) has a heat dissipation port (14) on its exterior for heat dissipation of the internal control module.

4. The dehumidification device for vehicle headlight repair according to claim 1, characterized in that: The lamp to be repaired (2) includes a lamp body (21), with a lamp cover (22) integrally formed on the outer side of the lamp body (21), and a ventilation opening (23) is provided at the top of the lamp body (21).

5. A dehumidification device for vehicle headlight repair according to claim 1, characterized in that: The hot air outlet duct includes a hot air duct (31) connected to the outlet duct (13), and a flexible outlet hose (36) is connected to the outside of the hot air duct (31). The end of the outlet hose (36) is fixed to the input end of the outlet connector (38).

6. A dehumidification device for vehicle headlight repair according to claim 5, characterized in that: The low-temperature air intake pipeline includes a low-temperature pipe (32) that is connected to the air intake pipe (12). The end of the low-temperature pipe (32) is connected to a preheating circulation pipe (33), which is wrapped around the outer wall of the hot air pipe (31).

7. A dehumidification device for vehicle headlight repair according to claim 6, characterized in that: The return air circulation pipeline includes a flexible return air hose (34) connected to the return air connector (37), and a recovery circulation pipe (35) is connected to the outside of the return air hose (34), which is wrapped around the outer wall of the low temperature pipe (32).

8. A dehumidification device for vehicle headlight repair according to claim 1, characterized in that: The expansion joint (4) includes a mating part (41), a connector (43) is fitted on the outside of the mating part (44), and an expansion part (42) capable of replacing the diameter is fitted between the connector (43) and the mating part (41).

9. A dehumidification device for vehicle headlight repair according to claim 1, characterized in that: The sensor (5) includes a plug (51), with a connecting wire harness (53) at the top end of the plug (51) and a sensor head (52) at the bottom end of the plug (51).

10. A dehumidification device for vehicle headlight repair according to claim 9, characterized in that: The plug (51) is sealed to the socket, the sensor head (52) monitors at least two or more data, namely humidity and temperature, in real time, and the connecting harness (53) is electrically connected to the hot air blower (1).

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