Edge Detection Window Cleaning Robot
Model:309 Pro
LIESA manufactures the edge detection window cleaning robot in Qingdao, China, with sensors that recognise the boundary of the glass and hold the unit clear of the frame or the edge of a frameless pane. Detection is monitored during the route, so the machine stops and turns rather than pressing on a seal.
Edge Detection Window Cleaning Robot by LISA, a China supplier, uses edge detection to identify the boundary of the glass and adjust its cleaning path before reaching the edge. This helps the robot stay on the glass surface and avoid riding onto the window frame or moving beyond the glass edge.
The detection system also helps maintain more consistent edge cleaning. By controlling the robot’s position near the boundary, it reduces unnecessary contact with the frame and helps the cleaning path stay closer to the usable glass area.
How Edge Sensing Works in Practice
Two methods are common. Non-contact sensing looks ahead for the absence of glass or for a frame feature, while contact sensing detects the resistance of the seal. Machines in this range combine the two, so a misread by one method is corrected by the other rather than causing the unit to press against the frame.
What the user experiences is the behaviour at the boundary: the edge detection window cleaning robot slows, turns and resumes the route at a fixed offset from the edge. That offset is what keeps the pad off the gasket, and it is set at the factory rather than adjusted per window.
Edge Handling Compared
| Method | How the boundary is detected | Behaviour at the edge |
| No sensing | Route is fixed by the user | Pressure on the frame or a fall on frameless glass |
| Contact sensing | Resistance of the seal | Stops, but can push before stopping |
| Non-contact sensing | Look-ahead detection of the glass edge | Slows and turns before reaching it |
| Combined sensing | Both methods cross-checked | Steady behaviour on framed and frameless glass |
The fourth row is the arrangement used here: the same setting works on a framed window and on a frameless panel without adjustment.
Specifications
| Overview | Model | 309 PRO | |
| Product Name | Edge Detection Window Cleaning Robot | ||
| Color | White / Pink | ||
| Appearance (Design Rendering) | |||
| Packing List | Main Unit (with built-in battery pack) × 1, Power Adapter × 1, AC Power Cord, DC Extension Cord × 1, Cleaning Cloths × 8, Safety Rope × 1, Remote Control × 1, User Manual × 1, Spray Bottle × 1, Battery × 1 | ||
| Detailed Specifications | |||
| Package | Color | White / Pink | |
| Main Unit Dimensions (L×W×H) mm | 269*136*78 | ||
| Main Unit Material | ABS+PC | ||
| Main Unit Net Weight (kg) | 1.18 | ||
| Overall Gross Weight (incl. 1-in-1 Master Carton, kg) | 2.45 | ||
| Color Box Dimensions (L×W×H) mm | 320x86x287mm | ||
| 1-in-1 Master Carton Dimensions (L×W×H) mm | 335x96x315mm | ||
| 5-in-1 Master Carton Dimensions (L×W×H) mm | 505x350x335mm | ||
| Function | Operating Mode | 1. Clean Upwards 2. Clean Downwards3. Clean Leftwards 4. Clean Rightwards 5. Spot Cleaning6. X1 Mode Cleaning (Dry/Wet Mopping; adjustable water volume for wet mopping—Small/Large—with Small as default) 7. X2 Mode Cleaning (Dry/Wet Mopping; adjustable water volume for wet mopping—Small/Large—with Small as default) | |
| Backup Battery Charging Time (h) | Approx. 2.5 hours | ||
| Backup Battery Runtime (min) | 20–30 minutes | ||
| Operating Noise (dB) | Approx. 68 dB | ||
| Operating Temperature & Humidity Range (°C / %) | 0–40°C; ≤85% RH | ||
| Operating Speed (min/m²) | Approx. 4 min 40 sec per square meter; one full water tank covers 18 square meters | ||
| Rated Power (W) | 72 W | ||
| Rated Voltage (V) | 24 V | ||
| Unit Lifespan (h) | ≥400 Pa | ||
| Suction Motor Speed (rpm) | 29,000 RPM ±10% | ||
| Speed Settings | Automatic Adjustment | ||
| Vacuum Pressure (Pa) | 2000–3200 RPM (Variable Frequency) | ||
| Manual Update (Firmware) | Yes | ||
| Low Battery Alarm | Yes (Buzzer) | ||
| Control Method | Remote Control (2.4G) — Controllable range: up to 25 meters | ||
| Minimum Working Surface Size (cm) | 30*30 | ||
| Water Spray Settings | 2 Levels | ||
| Water Spray Volume (ml/spray) | Small Setting: Approx. 0.06 ml/s; Large Setting: Approx. 0.09 ml/s | ||
| Water Spray Method | Atomizing Nozzle (Bi-directional Spray) | ||
| Water Level Detection | None | ||
| Applicable Surfaces | Glass, tiles, wooden doors, marble walls, and other smooth vertical surfaces | ||
| Structure | Solenoid Valve | Voltage | 24V |
| Indicator Light | Battery Indicator / Meaning of Indicator Light Colors | Yes | |
| Water Tank | Capacity (ml) | 60 ml | |
| Motor | Suction Motor Type | Brushless DC Motor | |
| Drive Wheel Motor Type | Brushed DC Motor | ||
| Battery | Battery Capacity (mAh) | 650 | |
| Battery Type | Lithium-ion Cells | ||
| Charging Current (mA) | Approx. 300 (at constant current) | ||
| Accessories | Adapter | Output Parameters: Voltage (V), Current (A) | 24V 3A |
| Input Parameters: AC (V), Frequency (Hz), Current (A) | AC 100–240V, 50/60 Hz, 2.5A | ||
| Safety Rope | Safety Rope Load Capacity (Kgf) | 150 | |
| Safety Rope Length | 5 m | ||
| Cleaning Cloth | Quantity | 8 Blades | |
| Other | Sensor | Distribution and Category | 1. 6-axis sensor (on the mainboard) 2. Barometric pressure sensor (on the button board) |
| Certification | CE | YES | |
| KC | YES | ||
Frames, Gaskets and Long-Term Effect
Gasket staining is a slow failure that buyers notice after a season. It comes from water pushed into the seal and from rubber compressed by a pad running against it, and both are avoided by the offset the edge detection window cleaning robot keeps at the edge. That is the reason edge behaviour is specified on the sample rather than left to the route.
Frame profiles differ between markets, so the offset is checked against a sample profile where a buyer supplies one. Where profiles vary widely, the machine is set to the wider offset, which leaves a few millimetres of glass uncleaned at the boundary and keeps the seal intact.
OEM and Order Notes
The edge detection window cleaning robot is supplied as OEM work on sensor configuration, edge offset, body colour, logo, carton artwork, manual language and accessory sets. Sensor behaviour is confirmed on a sample pane with the buyer's frame profile where one is available. Minimum order quantity, tooling and lead time are confirmed with the quotation.
Contact: Liesa Intelligent Technology (Qingdao) Co., Ltd., Qingdao, China | www.liesagadget.com. Factory address and full contact details are provided with the quotation.
FAQ
Q: How does the edge detection window cleaning robot know where the glass ends?
A: Contact and non-contact sensing are used together, so a frame feature or the absence of glass is confirmed before the drive changes direction.
Q: Will it ride onto the window frame?
A: The route keeps a set offset from the boundary, which keeps the pad off the frame and off the gasket. The offset is set at the factory.
Q: Does it work on frameless glass?
A: Yes. Non-contact sensing detects the edge of the pane, and the safety rope remains anchored as a backup.
Q: Why is the edge offset important?
A: Water pushed into the seal and rubber compressed by the pad are what stain a gasket over a season. The offset prevents both.
Q: Can the offset be adjusted for a specific frame?
A: Yes. Where a buyer supplies a frame profile, sensor behaviour and offset are confirmed against it on a sample.
Q: What is needed to quote?
A: The frame profile, market, sensor configuration, colour, quantity, packaging format and branding.
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Contact Info
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No.1, Keyuan Wei 1st Road, Laoshan District, Qingdao City, Shandong Province, China
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