Centralized cleaning work station for maintenance parts in warehouse

Abstract

The utility model discloses a centralized cleaning work station for maintenance parts in a warehouse, relates to the technical field of part cleaning, and aims to solve the problem that special cleaning equipment is required to be arranged for cleaning the parts in the warehouse. A rough cleaning chamber, a fine cleaning chamber and a manual supplementary cleaning chamber which are divided by a lifting isolation door, and a cleaning inlet and a cleaning outlet which are respectively communicated with the rough cleaning chamber and the manual supplementary cleaning chamber are sequentially arranged in the centralized cleaning room; an upper spraying frame and a lower spraying frame are arranged in the rough washing chamber, and the upper spraying frame is in sliding connection with the top of the rough washing chamber; a spraying robot is arranged in the fine cleaning chamber, sliding rails are arranged on the two sides of the fine cleaning chamber, the spraying robot is in sliding connection with the sliding rails, and a cleaning spray gun and a stain recognition device are installed on the spraying robot; a high-pressure cleaning machine is arranged in the manual supplementary cleaning chamber; and the upper spraying frame, the lower spraying frame, the cleaning spray gun and the high-pressure cleaning machine are connected with a cleaning liquid supply system. According to the cleaning work station, centralized cleaning of various parts is achieved, and independent matched cleaning equipment is not needed any more.

Description

Technical Field

[0001] This utility model relates to the field of component cleaning technology, and in particular to a centralized cleaning workstation for components under maintenance in a warehouse. Background Technology

[0002] In the current field of rail transit vehicle maintenance, especially in the maintenance of vehicles such as subways, high-speed trains, and locomotives, the cleaning of parts faces a series of challenges. Traditional cleaning methods are mainly based on semi-automatic or fully manual approaches, which are not only labor-intensive but also inefficient, making them unsuitable for large-scale and high-efficiency cleaning needs.

[0003] Furthermore, existing cleaning operations are typically scattered across different maintenance workshops or lines, resulting in low component turnover efficiency and low utilization of individual cleaning equipment. From an economic and environmental perspective, traditional cleaning methods consume large amounts of water and cleaning agents, generate significant amounts of wastewater, and create harsh working environments at the cleaning sites.

[0004] The decentralized cleaning method, which sets up cleaning stations in the maintenance workshop or maintenance line, has the following problems:

[0005] (1) Poor compatibility; it can only be used for specific components and cannot be compatible with all components in the field.

[0006] (2) The component cleaning process is simple;

[0007] (3) Low level of intelligence.

[0008] Therefore, it is necessary to provide a device that is compatible with a variety of parts to be cleaned, and can solve the cleaning process in one stop, avoiding the need for multiple dedicated cleaning devices for different parts. Utility Model Content

[0009] To address the aforementioned technical problems, this application provides a centralized cleaning workstation for in-warehouse maintenance components.

[0010] To achieve the above objectives, this utility model provides the following technical solution:

[0011] A centralized cleaning workstation for in-warehouse maintenance components is provided, characterized in that it includes a centralized cleaning room, which is located within the in-warehouse maintenance area;

[0012] The centralized cleaning room is provided with a rough cleaning room, a fine cleaning room and a manual cleaning room separated by a lifting isolation door. It is also provided with a cleaning inlet and a cleaning outlet that are respectively connected to the rough cleaning room and the manual cleaning room.

[0013] The rough washing chamber is equipped with an upper spray frame and a lower spray frame. The upper spray frame is slidably connected to the top of the rough washing chamber, and the lower spray frame is located at the bottom of the rough washing chamber.

[0014] The fine cleaning chamber is equipped with a spray robot, and slide rails are provided on both sides of the fine cleaning chamber. The spray robot is slidably connected to the slide rails, and a cleaning spray gun and a stain recognition device are installed on the spray robot.

[0015] The manual cleaning room is equipped with a high-pressure cleaner;

[0016] The upper spray frame, the lower spray frame, the cleaning spray gun, and the high-pressure cleaner are connected to the cleaning fluid replenishment system.

[0017] Compared with the prior art, the present invention has the following technical advantages:

[0018] The centralized cleaning workstation in this application is located within the warehouse maintenance area. Components to be cleaned are transported from different workstations to the centralized cleaning room via a material conveying device, where they undergo centralized cleaning. The centralized cleaning room is sequentially equipped with a pre-washing room, a fine-washing room, and a manual touch-up washing room. Components to be cleaned are sequentially cleaned in these rooms, ensuring effective cleaning through multiple cleaning processes. Adjacent cleaning rooms are separated by lifting isolation doors, facilitating the transfer of components between them. All three cleaning rooms utilize the same cleaning fluid replenishment system, resulting in lower construction costs. Sharing the centralized cleaning room within the maintenance area reduces the cost and burden of constructing individual cleaning rooms at each workstation. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0020] Figure 1 This is a plan view of the centralized cleaning workstation for the maintenance components inside the warehouse in an embodiment of this utility model;

[0021] Figure 2 for Figure 1 Schematic diagram of a medium-coarse washing room;

[0022] Figure 3 for Figure 2 Schematic diagram of the upper and middle spray frame;

[0023] Figure 4 for Figure 3 Front view of the upper and middle spray frame;

[0024] Figure 5 for Figure 1 A schematic diagram of the medium-sized shower room.

[0025] Figure label:

[0026] 10-Preliminary cleaning chamber, 11-Upper spray rack, 111-Horizontal guide rail, 112-Lifting frame, 113-Gantry frame, 114-Cleaning nozzle, 115-High-pressure centrifugal fan, 116-Air outlet, 12-Lower spray rack, 20-Fine cleaning chamber, 21-Spraying robot, 22-Slide rail, 23-Cleaning spray gun, 24-LiDAR, 25-Rinsing rack, 30-Manual cleaning chamber, 31-High-pressure cleaner, 32-Air cutter, 40-Cleaning fluid supply system, 50-Mist exhaust fan. Detailed Implementation

[0027] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0028] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] See details Figures 1 to 5 As shown in the figure, the centralized cleaning workstation for in-warehouse maintenance components provided in this embodiment of the utility model includes a centralized cleaning room and a material conveying device, wherein the material conveying device connects the maintenance workstation and the centralized cleaning room.

[0031] The centralized cleaning room is equipped with a rough cleaning room 10, a fine cleaning room 20 and a manual cleaning room 30, which are separated by a lifting isolation door. It is also equipped with a cleaning inlet and a cleaning outlet that are respectively connected to the rough cleaning room 10 and the manual cleaning room 30.

[0032] The rough washing chamber 10 is equipped with an upper spray frame 11 and a lower spray frame 12. The upper spray frame 11 is slidably connected to the top of the rough washing chamber 10, and the lower spray frame 12 is located at the bottom of the rough washing chamber 10.

[0033] A spraying robot 21 is installed inside the fine cleaning chamber 20. Slide rails 22 are installed on both sides of the fine cleaning chamber 20. The spraying robot 21 is slidably connected to the slide rails 22. A cleaning spray gun 23 and a stain recognition device are installed on the spraying robot 21.

[0034] A high-pressure washer 31 is installed in the manual cleaning room 30;

[0035] The upper spray frame 11, the lower spray frame 12, the cleaning spray gun 23 and the high-pressure cleaner 31 are connected to the cleaning fluid supply system 40.

[0036] In practice:

[0037] The centralized cleaning workstation is located in the maintenance area of ​​the warehouse. It connects to multiple maintenance stations within the area via a material conveying device, allowing all maintenance stations to share a single centralized cleaning room, thus reducing construction costs. The centralized cleaning room can be located in a non-track area of ​​the maintenance area or above the track. The track passes through the coarse washing chamber 10, fine washing chamber 20, and manual touch-up washing chamber 30 of the centralized cleaning room. The material conveying device includes a power unit, a bracket, and material boxes used in conjunction with the bracket. The power unit includes traction AGVs and track-crossing AGVs. The traction AGV can pull bogies, wheelsets, and other wheeled, unpowered devices from the maintenance station along the track to the centralized cleaning room for cleaning. After cleaning and verification, it is pulled back to the maintenance station along the track. The track-crossing AGV can carry the bracket and material boxes back and forth between the maintenance station and the centralized cleaning room. Small parts to be cleaned are placed in the material boxes, which are placed on the brackets during cleaning. Additionally, the brackets can hold frames, motors, brakes, and other components awaiting cleaning.

[0038] The centralized cleaning room is divided into a rough cleaning room 10, a fine cleaning room 20, and a manual cleaning room 30 arranged in sequence, for rough cleaning, fine cleaning, and manual cleaning operations, respectively. The rough cleaning room 10 and the fine cleaning room 20, as well as the fine cleaning room 20 and the manual cleaning room 30, are equipped with lifting isolation doors to separate and isolate water mist.

[0039] Both the rough washing chamber 10 and the fine washing chamber 20 can be equipped with multiple cleaning stations, arranged side-by-side along the central cleaning area. The number of cleaning stations in both chambers is the same. The upper spray rack 11 and lower spray rack 12 cover all cleaning stations in the rough washing chamber 10, and the spray robot 21 covers all cleaning stations in the fine washing chamber 20. By utilizing the multiple cleaning stations in the rough washing chamber 10 and fine washing chamber 20, multiple groups of parts can be cleaned simultaneously, improving cleaning efficiency while ensuring cleaning quality. Covering all cleaning stations ensures comprehensive cleaning of the parts within each station.

[0040] 1. Preparation of the object to be cleaned

[0041] (1) Small parts such as brakes, couplers, and valves can be placed in the material box or directly on the bracket, with the material box placed on the bracket. A positioning device is installed between the material box and the bracket to ensure that they do not move. The bracket can be transported by forklift, hoisting equipment, or AGV. The material box has a hollow structure so as not to block the cleaning water. The bracket has a certain height to facilitate cleaning operations from below. The small parts to be cleaned will be placed in the material box on the bracket at the maintenance station, and the bracket and material box will be transported together from the maintenance and disassembly area of ​​their respective products to a fixed position in front of the centralized cleaning room by AGV.

[0042] (2) Medium-sized components such as axle boxes, motors, and frames are placed directly on the brackets. AGVs can transport these medium-sized components from their respective product maintenance and disassembly areas to a fixed position in front of the centralized cleaning room.

[0043] (3) Bogies or wheelsets can be transported along the rail from their respective product maintenance and dismantling areas to a fixed position in front of the centralized cleaning room by traction AGV or manual labor, and then transported into the centralized cleaning room. Alternatively, bogies or wheelsets can be placed on a bracket and transported by AGV to a fixed position in front of the centralized cleaning room.

[0044] (4) The way the objects to be cleaned are transported from their respective product maintenance and dismantling areas to the centralized cleaning room can be by manual pushing or by a fully automatic or semi-automatic transportation method, such as traction AGV, rail-crossing AGV, etc.

[0045] 2. The parts to be cleaned enter the rough cleaning station in the centralized cleaning room.

[0046] (1) Products to be cleaned, carried on a tray, are transported to the rough cleaning station in the centralized cleaning room by forklift or AGV.

[0047] (2) The bogie or wheelset is transported by the traction mechanism (traction AGV) to the rough washing station in the centralized cleaning room.

[0048] 3. Rough washing

[0049] (1) The rough washing operation is carried out in the rough washing chamber 10. The rough washing chamber 10 is a closed space to prevent the washing water and water mist from overflowing. The rough washing chamber 10 is equipped with an observation window to observe the washing status. The rough washing chamber 10 is equipped with a lifting isolation door that can be opened and closed automatically or manually.

[0050] (2) The coarse cleaning chamber 10 is equipped with an upper spray frame 11 and a lower spray frame 12. The cleaning nozzles 114 and the swing nozzles are respectively installed on the upper spray frame 11 and the lower spray frame 12. The upper spray frame 11 has a gate-type structure and can move back and forth along the arrangement direction of the centralized cleaning room, so that the upper spray frame 11 covers the upper and side areas of the entire part to be cleaned; the upper spray frame 11 can also be raised and lowered, so as to accommodate parts to be cleaned at different heights. The swing nozzles of the lower spray frame 12 can swing left and right, so that the lower spray frame 12 covers the lower area of ​​the entire part to be cleaned.

[0051] (3) A mist exhaust fan 50 is installed at the top of the coarse washing chamber 10. The water mist in the coarse washing chamber 10 can be discharged into a special collection pipe by the mist exhaust fan 50.

[0052] (4) The cleaning fluid is drawn from the cleaning fluid container by the water pump of the cleaning fluid supply system 40 and supplied to the cleaning nozzles of the upper spray frame 11 and the lower spray frame 12.

[0053] (5) The cleaning fluid sprayed from the cleaning nozzle 114 and the oscillating nozzle can be returned to the cleaning fluid container (container A) and, after filtration and purification, can be recycled. A physical sedimentation structure can be set in the cleaning fluid container to concentrate and isolate particulate foreign matter in the physical sedimentation area for easy centralized cleaning.

[0054] (6) An air curtain drying device is also installed on the upper spray rack 11 to dry the parts before they enter the fine washing chamber 20 after the rough washing is completed.

[0055] 4. Send to the dehydration room

[0056] The parts to be cleaned are delivered to the cleaning station of the cleaning chamber 20 by manual or AGV operation.

[0057] 5. Fine washing

[0058] (1) The fine cleaning operation is carried out in the fine cleaning chamber 20. The fine cleaning chamber 20 is a closed space to prevent the overflow of cleaning water and water mist. The fine cleaning chamber 20 is equipped with an observation window to observe the cleaning status. The fine cleaning chamber 20 is equipped with a lifting isolation door (not shown in the figure) to separate it from the rough cleaning chamber 10. It can be opened and closed automatically or manually.

[0059] (2) Two cleaning spray guns 23 are respectively mounted on two spraying robots 21. The stain recognition device can identify areas on the parts to be cleaned that were not cleaned properly during the rough cleaning process. The cleaning spray guns 23 can spray high-concentration cleaning liquid or cleaning water, which is automatically switched by a valve. The high-concentration cleaning liquid is drawn from the high-concentration cleaning liquid tank by a centrifugal pump and supplied to the spray gun. The cleaning water is drawn from the cleaning water tank by a plunger pump and supplied to the spray gun. The cleaning water in the cleaning water tank is drawn from container A and filtered by a filtration device. The particle size of the foreign matter contained in the cleaning water is less than 100 micrometers. The aforementioned high-concentration cleaning liquid or cleaning water can be returned to container A.

[0060] (3) The lidar 24 system is installed on the top of the cleaning chamber 20 and can automatically identify the position and outline of the parts to be cleaned. The system can interact with the spray robot 21 system to guide the spray robot 21 to automatically generate the cleaning path.

[0061] (4) Two stain visual recognition systems are installed on two spray robots 21 respectively, which can identify the stains remaining after rough washing and guide the spray robots 21 to accurately clean the stains.

[0062] 6. Sent to the manual washing room 30

[0063] (1) The parts to be cleaned are sent to the manual cleaning station of the manual cleaning room 30 by manual or AGV.

[0064] (2) During the transfer, the parts will pass through the rinsing rack 25 and the air-cutting rack 32 in sequence to rinse and dry the parts.

[0065] (3) The rinsing rack 25 is fixed and also has a door-type structure. The spray nozzles can cover the top, bottom, and sides of the parts to be cleaned. When the parts to be cleaned pass through, the rinsing is completed. The clean water for rinsing is drawn from container B by a centrifugal pump and supplied to the nozzles. The water in container B is supplied by municipal tap water.

[0066] (4) The air cutter 32 is a fixed type. Several high-pressure blowers and air outlets are integrated on the air cutter 32 to blow off the water on the parts to be cleaned.

[0067] 7. Manual review

[0068] (1) The parts to be cleaned are transported to the corresponding manual maintenance station, either manually or automatically.

[0069] (2) Manually check the cleaned parts, and manually high-pressure clean the unqualified parts until the check meets the requirements.

[0070] 8. Items to be cleaned leave the centralized cleaning room.

[0071] After cleaning, the cleaned parts can be transported to the corresponding maintenance station manually or automatically.

[0072] The centralized cleaning workstation in this application is located within the warehouse maintenance area. Components to be cleaned are transported from different workstations to the centralized cleaning room via a material conveying device, where they undergo centralized cleaning. The centralized cleaning room is sequentially equipped with a pre-washing room, a fine-washing room, and a manual touch-up washing room. Components to be cleaned are sequentially cleaned in these rooms, ensuring effective cleaning through multiple cleaning processes. Adjacent cleaning rooms are separated by lifting isolation doors, facilitating the transfer of components between them. All three cleaning rooms utilize the same cleaning fluid replenishment system, resulting in lower construction costs. Sharing the centralized cleaning room within the maintenance area reduces the cost and burden of constructing individual cleaning rooms at each workstation.

[0073] As one possible implementation, the upper spray frame 11 includes a transverse guide rail 111, a lifting frame 112, a portal frame 113, and a cleaning nozzle 114. The transverse guide rail 111 is set at the top of the coarse washing chamber 10. One end of the lifting frame 112 is slidably connected to the transverse guide rail 111, and the other end is fixedly connected to the portal frame 113. The cleaning nozzle 114 is set along the portal frame 113 and is connected to the cleaning fluid supply system 40.

[0074] The horizontal guide rail 111 allows the portal frame 113 to reciprocate along the horizontal guide rail 111, enabling cleaning operations on parts to be cleaned at multiple cleaning stations. In conjunction with the lifting frame 112, the upper spray frame 11 can perform cleaning operations on parts to be cleaned with different cleaning height requirements, thus improving the applicability.

[0075] As one possible implementation, the upper spray frame 11 also includes an air curtain drying device; the air curtain drying device includes a high-pressure centrifugal fan 115 and multiple air outlets 116, the high-pressure centrifugal fan 115 and multiple air outlets 116 are fixedly connected to the portal frame 113, and the air outlets 116 are connected to the high-pressure centrifugal fan 115.

[0076] The air curtain drying device can drain the residual water after the rough wash, preventing the residual water from affecting the stain recognition device after entering the fine wash chamber 20.

[0077] As one possible implementation, the lower spray frame 12 includes a spray pipe and an oscillating nozzle; the spray pipe is laid along the ground of the coarse washing chamber 10, the oscillating nozzle is fixedly connected to the spray pipe, and the spray pipe is connected to the cleaning fluid supply system 40.

[0078] The swing nozzles of the lower spray rack 12 can swing, which can better cover the lower part of the parts to be cleaned and ensure the cleaning effect.

[0079] As one possible implementation, the cleaning workstation also includes a rinsing rack 25 and an air-cutting rack 32; the rinsing rack 25 is installed in the fine washing chamber 20 and located on the side near the manual cleaning chamber 30, and the air-cutting rack 32 is installed in the manual cleaning chamber 30 and located on the side near the fine washing chamber 20. The rinsing rack 25 is connected to the municipal pipeline network; the air-cutting rack 32 includes a mounting frame, a high-pressure blower, and an air outlet (designed in the same way as the air curtain drying device). The high-pressure blower and the air outlet are fixedly connected to the mounting frame, and the mounting frame is fixedly connected to the top of the manual cleaning chamber 30.

[0080] The rinsing rack 25 can rinse the parts after fine washing to remove residual cleaning solution, and the air cutter rack 32 can hang down the residual water on the parts after rinsing.

[0081] As one possible implementation, the material transfer device includes an AGV, a tray, and a material box. The material box is placed on the tray, and the AGV carries the tray back and forth between the maintenance station and the centralized cleaning room.

[0082] By setting up AGVs, brackets, etc., the parts to be cleaned that are scattered in different maintenance stations can be effectively transported to the centralized cleaning room for cleaning operations, thereby improving the utilization rate of the cleaning workstation.

[0083] As one possible implementation, the cleaning workstation also includes an exhaust fan 50; the exhaust fan 50 is connected to the coarse cleaning chamber 10, the fine cleaning chamber 20 and the manual touch-up cleaning chamber 30 via pipelines.

[0084] The defogging fan 50 can effectively remove the water mist generated during cleaning operations in the centralized cleaning room, ensuring good visibility within the room.

[0085] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0086] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A centralized cleaning workstation for in-warehouse maintenance components, characterized in that, This includes a centralized cleaning room, which is located within the warehouse maintenance area; The centralized cleaning room is provided with a rough cleaning room, a fine cleaning room and a manual cleaning room separated by a lifting isolation door. It is also provided with a cleaning inlet and a cleaning outlet that are respectively connected to the rough cleaning room and the manual cleaning room. The rough washing chamber is equipped with an upper spray frame and a lower spray frame. The upper spray frame is slidably connected to the top of the rough washing chamber, and the lower spray frame is located at the bottom of the rough washing chamber. The fine cleaning chamber is equipped with a spray robot, and slide rails are provided on both sides of the fine cleaning chamber. The spray robot is slidably connected to the slide rails, and a cleaning spray gun and a stain recognition device are installed on the spray robot. The manual cleaning room is equipped with a high-pressure cleaner; The upper spray frame, the lower spray frame, the cleaning spray gun, and the high-pressure cleaner are connected to the cleaning fluid replenishment system.

2. The centralized cleaning workstation for in-warehouse maintenance components according to claim 1, characterized in that, The upper spray frame includes a horizontal guide rail, a lifting frame, a gantry frame, and cleaning nozzles; The transverse guide rail is located at the top of the coarse washing chamber. One end of the lifting frame is slidably connected to the transverse guide rail, and the other end is fixedly connected to the portal frame. The cleaning nozzle is arranged along the portal frame and is connected to the cleaning fluid replenishment system.

3. The centralized cleaning workstation for in-warehouse maintenance components according to claim 2, characterized in that, The upper spray frame also includes an air curtain drying device; The air curtain drying device includes a high-pressure centrifugal fan and multiple air outlets. The high-pressure centrifugal fan and the multiple air outlets are fixedly connected to the portal frame, and the air outlets are connected to the high-pressure centrifugal fan.

4. The centralized cleaning workstation for in-warehouse maintenance components according to claim 1, characterized in that, The lower spray frame includes spray pipes and oscillating nozzles; The spray pipe is laid along the floor of the coarse washing chamber, the oscillating nozzle is fixedly connected to the spray pipe, and the spray pipe is connected to the cleaning fluid replenishment system.

5. The centralized cleaning workstation for in-warehouse maintenance components according to claim 1, characterized in that, The cleaning workstation also includes a rinsing rack and an air-cutting rack; The rinsing rack is installed in the fine washing chamber and located on the side close to the manual cleaning chamber. The air cutter is installed in the manual cleaning chamber and located on the side close to the fine washing chamber. The rinsing rack is connected to the municipal pipeline network. The air cutting frame includes a mounting frame, a high-pressure blower, and an air outlet. The high-pressure blower and the air outlet are fixedly connected to the mounting frame. The high-pressure blower is connected to the air outlet. The mounting frame is fixedly connected to the top of the manual washing room.

6. The centralized cleaning workstation for in-warehouse maintenance components according to claim 1, characterized in that, The centralized cleaning workstation also includes a material conveying device, which connects the maintenance station inside the warehouse and the centralized cleaning room. The material conveying device includes an AGV, a bracket, and a material frame. The material frame is placed on the bracket, and the AGV carries the bracket back and forth between the maintenance station and the centralized cleaning room.

7. The centralized cleaning workstation for in-warehouse maintenance components according to claim 1, characterized in that, The cleaning workstation also includes an exhaust fan; The defogging fan is connected to the coarse washing chamber, the fine washing chamber, and the manual touch-up washing chamber via pipelines.

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