Obstacle Detection Window Cleaning Robot

Model:311

LIESA makes the obstacle detection window cleaning robot in Qingdao, China, for glass carrying a handle, a latch or a mullion. The unit slows, offsets its path by the width measured, passes the feature and returns to the original line. Liesa Intelligent Technology has built household appliances in Qingdao since 2014, and supplies the model with OEM branding.

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Product Description

Designed for glass with handles, latches, mullions and other raised features, the Obstacle Detection Window Cleaning Robot identifies obstacles in the cleaning path and adjusts its route instead of stopping at the obstruction.

LISA, a China supplier of window cleaning robots, focuses on the response after detection as well as the sensing itself. The robot can slow down, change position or continue along the planned route according to the detected feature, helping reduce repeated stops and unnecessary contact between the cleaning pad and surrounding fittings.

Specifications

Model	311（square shape）
Specification
Color	White/Black/Custom
Unit Dimensions (LWH) mm	22922965 (including wheel height)
Unit Material	Engineering-grade ABS
Unit Net Weight (kg)	1.4
Gross Weight (including 1in1 carton, kg)	2.6 kg
Base Dimensions (LWH) mm	37326287 mm
1in1 Carton Dimensions (LWH) mm	388100285 mm
5in1 Carton Dimensions (LWH) mm	545405310 mm
Top Cover Logo	YiYin/Sticker
Feature	Description
Working Modes	1. N-pattern cleaning,
	2. Z-pattern cleaning,
	3. Upward cleaning,
	4. Downward cleaning,
	5. Leftward cleaning,
	6. Rightward cleaning,
	7. Full-point cleaning,
	8. XZ-axis cleaning (N+Z),
	9. Left-only N-pattern cleaning,
	10. Right-only N-pattern cleaning
Backup Battery Operating Time	Approx. 20-30 mins
Charging Time	Approx. 2.0 h
Operating Noise	Approx. 65 dB
Operating Temperature & Humidity Range	0-40°C / 85% RH
Rated Power	72 W
Rated Voltage	24 V
Service Life	≥400 h
Bidirectional Auto Water Spray	Yes (Atomized)
Number of Spray Heads	2 (Dual-side spray, 1 head per side)
Water Spray Volume	0.17 ml/min
Effective Spray Area	Approx. 120 m²
Low Water Alarm	Yes (Motorized water valve)
Edge Air Pressure Detection	Yes
Variable Frequency Airflow Algorithm	Yes
Antifreeze Control Algorithm	Yes
UPS (Uninterruptible Power Supply)	Yes
Automatic Air Spray Adjustment	Yes
Belt Self-Cleaning	Yes
Anti-slip Belt	Yes
Hybrid Management	Yes
Multi-language Support	Yes (Chinese + 1 language included; additional languages available at extra cost)
Fan Speed	31,500 RPM ±10% (No load)
Speed Settings	Fixed
Maximum Vertical Drop Under Timed Spray	5.5 kgf
Fan Operating Pressure	2400-2800 Pa
Manual Update	Yes
Low Battery Alarm	Yes
Control Method	Remote control (Infrared) / APP (Optional)
Minimum Working Area Size	60 * 40 cm
Applicable Spray Coating Thickness	≥3 mm
Suitable Applications	Deep pools, garden landscapes, large stone walls, fountains, wooden doors, etc.
Feature	Sub-feature / Specification	Details
Indicator Light	Power indicator / Different color meanings	Yes
Motor	Momentary motor type	DC Brushless Motor (Full air-cooled)
	Drive motor type	2 pcs DC Brushless Motors
Battery	Battery type	Cylindrical Lithium-ion Cell
	Battery capacity (mAh)	500 (4 x 14500 cylindrical batteries)
	Charging current (mA)	Approx. 230 (at constant current)
Water Tank	Capacity (ml)	60
	Water spray	Dual-row ceramic nozzles (2*1)
Adapter	Input: AC(V), Frequency(Hz), Current(A)	AC 100~240V, 50/60Hz, 2.0A
	Output: Voltage(V), Current(A)	24V / 3.0A
Safety Line	Safety guard (Kgf)	135
	Safety rope length	Approx. 5m
Other	Quantity	2
	Dimensions (LWH) mm	233 * 233 * 4.0
Sensors	6-axis sensor	1
	Photoelectric sensor	4
	Water level sensor	1
	Highly sensitive air pressure sensor	/
Certifications	CE	Yes
	FCC ID	Yes
	RoHS	Yes
	WEEE	Yes
Installation Data	20Hz container capacity	2200 pcs
	40Hz container capacity	4300 pcs
	40HQ container capacity	5200 pcs

What Counts as an Obstruction

Four features cover most cases. A casement handle inside the frame is the most common. A latch or a lock stand proud of the glass on sliding doors. A mullion divides the opening, which the obstacle detection window cleaning robot treats as an edge rather than an obstacle. And a curtain or blind cord against the pane is detected before the pad reaches it, so fabric is not drawn into the cleaning path.

The response to each is set rather than improvised. the obstacle detection window cleaning robot slows, offsets the route by the width it has measured, passes the feature and returns to the original line. Because the offset is recorded, a second pass over the same pane follows the same path rather than discovering the obstacle again.

Detection Methods Compared

Method	What it detects	Behaviour
None	Nothing	Route ends at the obstruction
Contact sensing only	Resistance when the body meets a feature	Stops after touching
Non-contact sensing	Features ahead of the pad	Slows, offsets, passes
Combined with route memory	Features plus their position	Repeats the same path on later passes

The fourth row is the arrangement used here: on a window with two or three features the machine makes several corrections in one cycle.

False Triggers and Curtains

A sensor that responds to reflections rather than to objects will stop the machine on a shadow or a bright band, which is the complaint that makes an owner switch the feature off. Sensitivity is set against a list of normal conditions

Curtains are handled by combination rather than by force. The unit stops before the hem and the user is expected to draw the fabric aside, which is stated in the manual, rather than the machine pushing into it and pulling fabric onto the wet pad.

OEM and Order Notes

The obstacle detection window cleaning robot is supplied as OEM work on sensor sensitivity, offset behaviour, body colour, logo, carton artwork, manual language and accessory sets. Detection behaviour is confirmed on a sample pane carrying the buyer's typical window hardware. 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: What does the obstacle detection window cleaning robot recognise?

A: Handles, latches and other hardware standing proud of the glass, mullions dividing a pane, and fabric such as a curtain or blind cord drawn against the window.

Q: What happens when it meets a handle?

A: The unit slows, offsets its path by the width it has measured, passes the feature and returns to the original line. The offset is remembered for later passes.

Q: Will it stop on a shadow?

A: Sensitivity is set against normal conditions including low sun on glass, so reflections do not trigger a stop. Behaviour is checked under both light conditions on samples.