The invention relates to a method and a device for preventing fast changes of the atmospheric pressure in an enclosed room (1) induced by an external environment. According to the invention, the internal pressure in the room (1) is monitored by a sensor (3). Fast changes of the internal pressure are at least partially compensated for by the targeted supply or removal of air. The supply and removal of air preferably occurs with overpressure and underpressure containers (5, 6).

Method and device for preventing fast changes of the internal pressure in an enclosed room

of EP1050446Pressure sensor (52) located at head of train has orifices such that static pressure near atmospheric is measured. Pneumatic integrator (56) sensitive to altitude enables pressure variations within tunnel to be taken into account, and differential press sensor (54) provides output signal (S1) used to control air input (22), air output (24) and condensation (36) valves through controller (28).

Protection device against pressure waves in passenger transportation vehicles

The invention relates to a pressure regulating device in a car and a regulating method of the pressure regulating device. The regulating method includes the following steps: S1, a pressure value P ina carriage is detected; and S2, the angle of a waste exhaust valve is adjusted and corrected by a control device according to a starting command until the target requirement is met. According to the pressure regulating device in the car and the regulating method of the pressure regulating device, the problem of the change of the pressure in the car caused by the change of fan performance and air duct resistance when a vehicle is in use is solved, and meanwhile, the problem of the change of the pressure in the car caused by the change of an air duct and other the vehicle structures after improved design on existing platforms is further solved; the pressure in the carriage is adjusted by adjusting the angle of an air valve, the pressure in the carriage is always controlled within a reasonable range, and the comfortability of riding in the car is achieved; and meanwhile, tests and simulations for adjusting the pressure in the car during improved design of the existing platforms can be avoided, and the cost of testing is greatly lowered.

Pressure regulating device in car and regulating method of pressure regulating device

The invention relates to an air conditioning pressure wave function test method for a motor train, which comprises an ambient pressure adjustment and pressure wave function test, and is characterized in that: a notebook computer is connected with a train main processing unit, maintenance software is utilized for searching an ambient pressure variable, a pressure value is set to be higher than an allowable value, and a pressure protection control device is triggered to be operated; and at a fresh wind port and a waste exhaust port of each train, the operation sound of a wind door is heard, when a closing sound of the wind door is heard, the air conditioning pressure wave function is proved to be normal. According to the air conditioning pressure wave function test method for the motor train, detection on the air conditioning pressure wave function in a manufacturing factory is realized; during detection, only the ambient pressure variable is required to be reset, no part is needed to be disassembled, so that no personal safety risk exists; and meanwhile, the operation is simple, and the actual working efficiency is improved; and the limitation of test conditions of the manufacturing factory is rid of, detection can be carried out at any ambient pressure, and the generality and the integration of the detection method are realized.

Air conditioning pressure wave function test method for motor train

Dispositif de protection contre les ondes de pression dans les vehicules de transport de personnes

The vehicle has a ventilator which is closed in response to an external pressure wave. A valve (V) connects the compartment to an inlet orifice (O) that is located in an area of high dynamic pressure, and a sensor (P) which measures absolute pressure is located in the compartment. A controller which operates the ventilation is provided. This opens the valve in response to a reduction in pressure being sensed by the sensor and so limits the reduction in internal pressure.

Carisey Christophe

Papers

Pressure control system for passenger compartment of vehicle