Transit type vacuum excrement collecting system for train, and control method

Abstract

The invention relates to a transit type vacuum excrement collecting system for a train, and a control method. The system comprises a dirt box, a transfer box and a grey water box, the other end of a grey water box drainage pipe is connected to a dirt inlet pipe between a toilet stool blow-down valve and a second valve or directly connected to the transfer box, and a vacuum switch is installed on apositive pressure gas circuit in front of the grey water blow-down valve or directly installed on a vacuum generator. Meanwhile, the steps of vacuumizing fault judgment, low-pressure protection switch fault judgment, tank full liquid level judgment, position sensor and blow-down valve fault judgment and the like are added to control logic of the system. Therefore, the phenomenon that dirt and grey water in the transfer box are reversely sprayed from the toilet stool and the hand washing sink due to pipeline blockage or functional part damage is completely eradicated, meanwhile, the system canaccurately judge whether a device or a system component breaks down, an alarm is given only when it is judged that the system component breaks down, sanitary equipment is controlled to be used temporarily, and the working stability and reliability of the system are further improved.

Description

technical field [0001] The invention relates to a water supply sanitation equipment, in particular to a transit vacuum feces collection system and control method for trains. Background technique [0002] In recent years, domestic high-speed trains and other vehicles have all been equipped with vacuum defecation collection systems, which generally include dirt tanks, transfer tanks, and gray water tanks. Among them, the transfer box is used to temporarily store the sewage and gray water discharged from the toilet and the gray water tank, and the gray water tank is used to temporarily store the gray water discharged from the sink. The transfer box is connected to the waste tank through the sewage pipe, and the transfer box is connected to the vacuum generator At the same time, it is also connected with an air circuit for adding positive pressure to the transfer box. The transfer box is connected to the toilet through the sewage inlet pipe. The toilet sewage valve is installed ...

AI Technical Summary

Problems solved by technology

[0003] The existing vacuum defecation collection system uses air source as power. When the general functional devices are damaged or the pipeline is blocked, there is a certain probability that the toilet or sink will be sprayed back during use, making the toilet or sink unusable, and passenger Dissatisfaction complaints, etc.

[0004] For example, in the prior art, when the gray water tank of the vacuum defecation system enters the drain pipe of the transfer box, only a slide valve is set to control the opening and closing of the pipeline. There is a risk of positive pressure air entering the vehicle through the gray water tank causing backspray at the sink

In addition, the vacuum switch of the vacuum defecation collection system in the prior art is installed on the vacuum generator. When the vacuum pipe pinch valve cannot be opened or the ejector is blocked, the vacuum switch cannot detect the air pressure state in the transfer box, and only the ejection is detected. At this time, the vacuum switch will be turned on. The actual transfer box may be under positive pressure. The system will mistakenly think that the vacuum degree in the transfer box has been established. At this time, the toilet drain valve will open. Automatically open, the positive pressure air in the transfer box will be directly sprayed out from the sewage outlet of the toilet

[0005] In the existing vacuum defecation collection system, there are often malfunctions of functional devices such as vacuum switches and liquid level switches, which lead to false alarms of the system, and then control the deactivation of sanitary equipment, which brings troubles to the use of passengers and makes the system Work stability and reliability are greatly affected, seriously affecting the passenger experience

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