Principle of Foam Blocking in Mobile Toilets

The principle of foam blocking in mobile toilets achieves water conservation and odor removal through foam generation, blocking lubrication, and intelligent control, replacing traditional water flushing methods. Its core mechanism can be divided into the following steps:

Foam Generation and Injection

The device is equipped with a built-in foam generator triggered by sensors. The system mixes a dedicated foaming agent, a small amount of water, and air in proportion within the foaming chamber, generating a large amount of fine and dense foam through physical stirring or compressed air action. Some systems directly convert the foaming agent and water mixture into foam through the foaming device. The generated foam is continuously injected into the toilet bowl through pipes, covering the entire drainage area. This process does not require a large amount of water; only 0.1-0.3 liters of water are needed for a single flush, achieving a water-saving rate of over 90%, and even exceeding 96% in some scenarios.

Foam Blocking and Lubrication

The injected foam forms a dense foam layer on the surface of the excreta, serving three functions:

1. Odor Blocking: The foam layer acts like a seal, covering the drainage pipes and effectively locking in odors, preventing them from overflowing back into the toilet compartment and physically blocking the diffusion path of odors.
2. Visual Blocking: The white foam completely covers the drainage opening, preventing users from directly seeing the waste during use, enhancing the user experience and reducing psychological discomfort.
3. Lubrication and Flushing: The foam contains lubricating components that can wrap around the excreta and reduce its friction with the inner walls of the toilet bowl, allowing the waste to smoothly fall into the collection bin without relying on water flushing. This characteristic makes it well-adapted to both solid and liquid excreta, and it operates within a temperature range of -30℃ to 60℃, suitable for extreme environments.

Intelligent Control and Dynamic Replenishment

The system achieves automated operation through infrared sensors or PLC intelligent control modules. When the user leaves the toilet compartment or the foam level decreases to a set threshold, sensors trigger the foam generator to replenish new foam, ensuring uninterrupted blocking 24 hours a day. Maintenance only requires regular emptying of the collection bin and replenishment of the foaming agent, without the need for complex biochemical reaction management, making operation simple and cost-effective.

Summary of Technical Characteristics: This principle achieves efficient water conservation and odor removal through physical isolation, with extremely low water consumption per flush, strong adaptability, and simple maintenance. It is particularly suitable for water-scarce areas, outdoor temporary events, and scenarios without a sewer network, representing an important development direction in eco-friendly toilet technology.