Star-rated public restrooms in Tianhe, Guangzhou

Project overview

In 2020 Tongwei supplied the smart-restroom scheme for the star-rated public restrooms in Tianhe District, Guangzhou. The sites include a mother-and-baby room. Each restroom uses one management host to join stalls, air, lighting, fresh air and floor washing. Squat and seated toilets sense occupancy, flush when the user leaves, and drive an outside indicator; the entrance screen shows free stalls. Fresh-air deodorising starts when air quality exceeds its limit. Lighting does not follow a sound-activated timeout: lights stay on while any stall is in use, and turn off when illuminance is already enough, so a stall does not go dark mid-use and daytime lights do not idle. Floors wash automatically on separate male, female and accessible circuits, and stalls have automatic drying, so cleaning starts when the user leaves rather than when a cleaner arrives. The sites share the Tianhe smart-restroom platform, where free stalls, ammonia, hydrogen sulfide, footfall, water and electricity can be read together; cleaning follows traffic and odour, not only a fixed roster. Eight of the restrooms were built to the same configuration: about 94 squat pans and 15 seated toilets.

On site

Stalls in a Tianhe star-rated restroom, with green free indicators on the doors — Occupancy indicators outside the stalls

A row of stall doors with green indicators along the top — Free stalls are marked, so people need not try each door

A mother-and-baby room in the star-rated restroom, with a crib and seats — Mother-and-baby room in the star-rated restroom

Occupancy sensing and flush fittings on a squat-pan partition — Occupancy sensing at a squat pan

Solenoid valves and wash piping under a sink — Solenoid valves on the flush and wash lines

The floor-wash channel under the stall doors — Floor-wash channel

Tianhe smart-restroom screen showing free stalls, air and footfall for the men's and women's rooms — One restroom: free stalls, air and footfall

Guangzhou Tianhe sanitation platform summarising footfall and air across the restrooms — The Tianhe platform rolls the restrooms up together

Main functions delivered

Stall sensing: about 94 squat pans and 15 seated toilets stay marked occupied while someone is still inside
Flush after use: the valve runs when the person leaves, without relying on a button press
Occupancy signs: an indicator outside each stall, and the entrance screen totals free stalls, so people stop opening doors to check
Air and fresh air: several air-quality points per restroom; fresh-air deodorising follows the threshold instead of a timer
Automatic lighting: stay on while any stall is occupied; turn off only when all stalls are free and illuminance is already enough. Sound-activated lights no longer go dark mid-use, and empty rooms do not stay lit
Automatic floor wash: three circuits per restroom for male, female and accessible rooms, rinsing the floor after use
Automatic drying: stalls dry after flushing and floor washing, so wet floors do not linger
One view: footfall, air quality and equipment status from all eight sites; cleaning follows traffic and alarms

Project list

The list is published without prices or contacts.

One set per restroom (8 sites)

Category	Item	Model	Qty	Use
Host	Smart restroom management host	BEC2000	8	Collects stalls and air, and interlocks lighting, fresh air and washing on site
Display	Entrance display	Restroom entrance display	8	Shows free stalls and conditions before entry
Lighting	Intelligent lighting controller	Lighting control	8	Controls lights from stall occupancy and illuminance
Lighting	Illuminance detector	Illuminance sensing	24	Decides whether lights are still needed
Lighting	Presence detector	Presence sensing	24	Helps tell whether the room is occupied
Environment	Air-quality detector	Odour sensing	24	Monitors odour and starts fresh-air deodorising
Fresh air	Fresh-air deodorising controller	Deodorising control	8	Runs fresh-air deodorising when air quality exceeds its limit
Footfall	Footfall counter	In/out counting	16	Counts entries and exits for cleaning schedules
Washing	Floor-wash control	I/O module / contactor / solenoid valve	24 each	Three circuits per site for male, female and accessible rooms
Drying	Automatic drying	Per stall	Per stall	Shortens wet-floor time after flushing and floor washing

Stalls and accessible rooms

Category	Item	Model	Qty	Use
Stall	Squat-pan occupancy sensing	Occupancy / flush after use	94	Detects occupancy and flushes when the user leaves
Stall	Seated-toilet occupancy sensing	Occupancy / flush after use	15	Occupancy and flush-after-use for seated toilets
Indicator	Stall occupied indicator	Occupied / free indicator	111	Shows outside the stall whether it is in use
Alarm	Accessible-room emergency alarm	Sound and light alarm	8	One emergency call in each accessible room
Platform	Smart restroom management platform	TW-SmartView	1	One view of footfall, air, equipment and alarms across eight restrooms

The problem

Tianhe's restrooms are busy, so odour, wet floors and finding a free stall depend on cleaners watching. Sound-activated lights can go out while a stall is still occupied; missed flushes and unwashed floors mean complaints arrive before detection.

What we connected

Squat and seated occupancy sensing, flush after use, occupied/free indicators outside the stall
Air-quality sensing, entrance screen, fresh-air deodorising interlock
Illuminance and presence sensing, automatic lighting control
Zoned automatic floor washing and automatic stall drying
Footfall counts, accessible-room emergency call, one platform for all eight sites

What we did

One management host per restroom; stalls, lights, fresh air and floor washing interlock on site, not only after a cloud round-trip
Lighting stays on from stall occupancy, then yields to illuminance, so lights neither drop on an occupant nor stay on in an empty, bright room
Flush, zoned floor wash and drying follow the same departure, so cleaning starts before a cleaner arrives
The entrance screen shows free stalls and conditions; the eight sites then roll up to the management platform

How it was rolled out

Per site, confirm squat pans, seated toilets, the accessible room, and lighting and wash circuits
Install occupancy, indicators, air quality and the host first, then lighting, fresh air, floor washing and drying
Prove flush, light-off and wash timing on one site, then bring all eight onto one board

Outcome

Flush, zoned floor wash and drying start when the user leaves; odour and standing water no longer wait for a cleaner
Lights stay on for an occupant and stay off when the room is empty and bright enough — a better fit than sound-activated lighting
People see free stalls and air conditions at the door; the same rules copy across all eight restrooms

If your site is similar

Send restroom count, squat and seated counts, whether you need flush-after-use, floor washing, drying and occupancy-held lighting, and how cleaning is rostered.

Products involved

Products used

BEC2000 Smart IoT Gateway BEC2000 SDS / IOC Expansion Modules SDS / IOC Environment and Status Sensors Temp-humidity / leak / smoke / gas / water quality AIoT Operations Platform AIoT Data Platform

Related core business

Scene Solution Services Scene Services Smart Restroom Open the scenario

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Next step

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