Water Tank Design for Ultrasonic Atomizing Modules
A good tank keeps the operating water depth stable, lets mist leave without excessive condensation, protects electrical connections and allows the module to be removed for cleaning.
Design around the operating water line
The key dimension is not total tank height. It is the distance between the ceramic disc surface and the working water line. The inlet system, float and overflow must hold this level while the module is running and water is being atomized.
Give the module enough clearance
Do not place the atomizer directly against a wall, baffle or air inlet. Restricted water movement can create uneven output and local heat. Leave access around the module so it can be lifted out without removing unrelated components.
Separate water and electrical areas
Cable exits, connectors and the power supply should be positioned away from splash and condensate. Even when a power supply is rated IP67, it should not be mounted where water can collect around glands or connectors.
Manage airflow and condensation
Mist needs a controlled path out of the tank. A fan mounted too close can disturb the water surface; a weak fan may allow fog to collapse back into the tank. Ducts should avoid sharp restrictions and should be arranged so condensate drains back safely instead of reaching the outlet or fan.
Inlet, overflow and drainage
A float valve should be easy to inspect and should not be blocked by the module. Include an overflow path for inlet-valve failure and a drain that lets the tank be cleaned completely. Dead corners collect scale and biological contamination.
| Design point | Recommended approach |
|---|---|
| Working depth | Set from disc surface, not tank floor |
| Module access | Removable without dismantling the whole machine |
| Air inlet | Above splash zone and away from direct water disturbance |
| Condensate | Slope surfaces or ducting back to a safe drain path |
| Overflow | Provide independent protection against inlet failure |
| Cleaning | Avoid inaccessible corners and fixed obstructions |
Materials and water treatment
Stainless steel and suitable engineering plastics are common choices. Material selection should consider water quality, cleaning chemicals and any process liquid. If RO water is used, avoid unnecessary contamination from rusting fasteners or unapproved sealants.
Prototype testing
Run the tank at minimum and maximum water supply conditions. Check start-up, low-water protection, full output, condensate return and service access. A clear cover or temporary inspection window is useful during development.
Frequently asked questions
Can the module sit directly on the tank bottom?
Only when the module design and required water depth allow it. Many systems use a bracket or float structure to maintain the correct position.
How large should the tank be?
Large enough for stable water level, module clearance and the required runtime. Tank volume alone does not determine mist output.
Should the fan blow into or pull from the tank?
Both arrangements can work, but the airflow must not disturb water level or draw droplets into the duct. Test the complete path.
Designing an OEM mist tank?
Send a sketch with tank dimensions, outlet position, required output and available voltage. We can review the module position and water-level arrangement.
Send your tank layoutUse a tank shape that can be drained completely
Flat areas and internal corners collect sediment and cleaning water. A slight slope toward the drain helps remove old water and mineral residue. The drain should be accessible without removing the complete humidifier.
Protect the air path from carryover
The tank needs enough free space above the water for droplets to separate and for mist to enter the airflow. If the fan pulls water directly from the surface, large droplets can enter the duct and form condensate. Baffles or a larger separation chamber may be needed at high output.
| Tank feature | Purpose |
|---|---|
| Level mounting surface | Maintains even depth across all heads |
| Overflow | Protects against inlet or float failure |
| Low-point drain | Allows full cleaning and water replacement |
| Removable cover | Provides inspection and module access |
| Mist separation area | Reduces large-droplet carryover |
Keep the float away from turbulence
Place the level control where inlet flow, fan suction and returning condensate do not make it oscillate. A simple calming chamber can improve level stability and reduce frequent valve movement.
Frequently Asked Questions
Can the module sit directly on the tank bottom?
Only when the module design and specified water depth allow it. The ceramic surface must remain at the correct depth and the module must be removable.
How large should the tank be?
It must provide stable depth, thermal capacity, mist separation and service access. Capacity is not determined by output alone.
Should condensate return to the tank?
It can, when the duct is clean and sloped correctly. The return path must not disturb the float or introduce contamination.