40 results about "Cabin pressurization" patented technology

Cabin air is managed in the aircraft as a function of the minimum requirements for defined air quality needs, temperature control needs, and cabin pressurization needs. Airflow may be varied dynamically as a function of aircraft or cabin altitude, and the minimum requirements for airflow may be determined in real time so as to dynamically set an airflow schedule.

A cabin pressure control system and method improves cabin pressurization during aircraft take-off operations. The cabin pressure control system sets a cabin pressurization rate limit based on a cabin pressurization rate error. The cabin pressurization rate error is derived from a comparison of a sensed cabin pressure rate-of-change value and a predetermined cabin pressurization rate value.

A method for emergency ventilating and pressurizing an aircraft cabin comprises determining a cabin pressure within the aircraft cabin and determining an ambient pressure in an aircraft environment. Descent of the aircraft is initiated when the cabin pressure falls below a predetermined threshold value. A supply of ambient air from the aircraft environment into the aircraft cabin is initiated, when, during descent of the aircraft, a differential pressure between the cabin pressure and the ambient pressure falls below a first calculated threshold value. The supply of ambient air into the aircraft cabin and an operation of an air outflow valve of a cabin pressurization system of the aircraft are controlled such that a flow of ambient air into the aircraft cabin corresponds to at least a predetermined minimum value and the differential pressure between the cabin pressure and the ambient pressure does not fall below a second calculated threshold value.

The invention discloses a multi-cabin double-system environment control system for a helicopter, which can realize conversion between refrigeration of an electronic equipment cabin of the helicopter and refrigeration and heating of a cabin, and comprises a cabin pressurization system without engine air entraining, so that the influence of the environment control system on a power source is reduced, and the maneuvering characteristics of the helicopter are improved. By the adoption of the compressor middle air supplementing technology, after primary throttling, part of refrigerant flows into the electronic equipment cabin for heat absorption and cooling, and then enters the compressor in an air supplementing mode; the remaining refrigerant continues to be throttled to lower pressure, flowsinto a cabin side evaporator (during refrigeration) or an environment side evaporator (during heating) for heat absorption, and then flows into the air suction end of the compressor; the exhaust temperature of the compressor can be reduced, normal work of a refrigerating system in a high-temperature environment is achieved, and it is guaranteed that an environment control system can effectively operate in an all-weather and wide-working-condition environment; and lubricating oil heat and heat dissipating capacity of electronic equipment are recycled, so that real-time comprehensive managementof the whole machine energy is realized, and the heating efficiency is improved.

An aircraft cabin pressure control system implements control logic that significantly reduces potentially uncomfortable pressure bumps that can occur during aircraft take-off rotation both with and without cabin pressuring fluid flowing into the aircraft cabin. The control logic implemented by the cabin pressure control system, among other things, determines whether the cabin pressurizing fluid is flowing into the aircraft cabin. If the cabin pressurizing fluid is flowing into the aircraft cabin, aircraft cabin altitude is controlled to at least a first predetermined minimum altitude value below the take-off altitude. If the cabin pressurizing fluid is not flowing into the aircraft cabin, aircraft cabin altitude is controlled to at least a second predetermined minimum altitude value above the take-off altitude.

A cabin pressure control apparatus that has an outflow valve that operates with a reference chamber without the need of using bleed air from the aircraft engines to adjust the pressure within the reference chamber. The invention has only pneumatic connections and no electrical connections to the outflow valve. Intrinsic negative differential protection is provided. Control solenoid(s) and pump(s) are internal to the controller for protection and simplified interconnection. The apparatus can be easily fitted in the aircraft without requiring additional cockpit panel space. The aircraft pressurization control apparatus is fully backward compatible with existing pressurization control systems as currently being manufactured by Kollsman, Inc.

The invention discloses a cabin pressurizing oxygen supply system based on aerodynamic turbine driving. The cabin pressurizing oxygen supply system comprises a temperature sensor, a first electric control valve, a first heat exchanger, a water separator, a Venturi pressure stabilizer, a pressure sensor, a first flow sensor, an aerodynamic turbine, a second electric control valve, a hollow fiber membrane separator, a centrifugal compressor, a second flow sensor, a second heat exchanger, a third flow sensor and a controller. According to the invention, the centrifugal compressor driven by the aerodynamic turbine is used for recycling the oxygen-enriched gas of the hollow fiber membrane separator. The oxygen content of the cabin is increased, the pressure height of the cabin is conveniently increased, and the requirement for the structural strength of the cabin is effectively reduced; the air entraining amount of an engine air compressor is reduced, and the compensation loss of an airplane is reduced; the system has no motor drive and is feasible to manufacture; the aerodynamic turbine has the advantages of being high in rotating speed, small in size and large in flow and meets the technical requirement for cabin pressurization and oxygen supply.

The present invention discloses a device and a method for quickly detecting the air leakage of an ultraviolet germicidal lamp. The device for quickly detecting the air leakage of the ultraviolet germicidal lamp is composed of a high-pressure cabin body and the high-pressure cabin body is arranged on a cabin body bracket bench. The high-pressure cabin body is provided with a high-pressure cabin door, a cabin pressurization valve and a steady-pressure decompression valve. The method specifically comprises the steps of vacuumizing a to-be-tested lamp tube, and hermetically filling the inert gas inside the lamp tube; 2) placing the above lamp tube processed in the step 1) in the high-pressure cabin body, connecting the high-pressure cabin body with a pressurization pump, and switching on the cabin pressurization valve to pressurize the high-pressure cabin body; 3) switching on the steady-pressure decompression valve to take the to-be-tested lamp tube out of the high-pressure cabin body when the air pressure outside the to-be-tested lamp tube is 300-600 times the air pressure inside the to-be-tested lamp tube; 4) detecting the to-be-tested lamp tube by means of a high-frequency spark leak detector. The device is simple in operation method and greatly shortens the manufacturing cycle. Meanwhile, the quality reliability of products is improved. The air-leakage problem of lamp tubes in the lamp manufacturing industry can be solved.

An environmental control system (ECS) for an aircraft includes at least one cooling turbine, and a turbine bypass valve disposed fluidly upstream of the at least one cooling turbine. The turbine bypass valve is configured to direct a first portion of an ECS output airflow to a first air load at a first pressure via a first outlet passage, and direct a second portion of the ECS output airflow across a cooling turbine of the at least one cooling turbine and to a second air load at a second pressure lower than the first pressure for cooling thereof.

An energy harvesting system is provided and a corresponding method for harvesting energy from an aircraft cabin pressurization system utilizing the same. According to one aspect, an energy harvesting system includes an aircraft cabin enclosing a high-pressure environment of pressurized air. An air input receives incoming air from a low-pressure environment and an air output expels outgoing air from the high-pressure environment. A turbine receives the pressurized air expelled from the aircraft cabin and utilizes the pressurized air to produce rotational motion on a turbine shaft. An energy harvesting mechanism is coupled to the turbine shaft and utilizes the rotational motion from the turbine shaft to compress the incoming air or to create electrical energy.

The invention relates to a hyperbaric oxygen treatment device and a using method thereof, in particular to a carbon dioxide mixed oxygen hyperbaric oxygen treatment device and a using method. The device is provided with a sealed cabin body, and the cabin body is provided with a cabin pressurization valve, a cabin pressure reduction valve, a pressure sensor, a carbon dioxide concentration sensor and a controller; a cabin grounding device is arranged on the cabin body. The using method includes the steps that a patient enters the pressurized cabin body, and the cabin body is sealed; when the concentration of carbon dioxide in the cabin body reaches 1.2-2.2%, the cabin pressurization valve is switched on, oxygen is introduced for pressurizing the cabin body, and then the cabin pressurizationvalve is switched off when the pressure reaches a treatment set value; a carbon dioxide partial pressure value is detected and converted, after the set value is reached, the opening angle of the cabinpressurization valve and cabin pressure reduction valve is controlled, and oxygen is introduced for ventilation and gas exchange when the carbon dioxide partial pressure value in the cabin body is kept within a set value range and the pressure is unchanged. The device has the advantages of being simple in structure, convenient to use, capable of dilating blood vessels and improving blood circulation and blood oxygen tension of the human body, good in therapeutic effect and the like.

The invention discloses a full-immersion accelerated corrosion crushing device for a submarine pipeline. The full-immersion accelerated corrosion crushing device comprises a full-immersion accelerated corrosion simulation area and a deep sea pressure bin pressurization area, the full-immersion accelerated corrosion simulation area comprises an electrochemical workstation, an electrolysis test pool, a solution concentration control mechanism, a pipeline test piece placement mechanism and an electrode group, wherein the solution concentration control mechanism is used for adjusting the concentration of a corrosion medium in the electrolysis test pool, and the electrochemical workstation is used for providing corrosion current for the electrolysis test pool; the deep sea pressure cabin pressurization area comprises a pressure cabin, a test piece filling mechanism, a pressure control mechanism and an underwater video monitoring mechanism, the test piece filling mechanism is used for moving the pipeline test piece close to or out of the pressure cabin, and the pressure control mechanism is used for adjusting the pressure in the pressure cabin. The invention further discloses a submarine pipeline full-immersion accelerated corrosion crushing method based on the submarine pipeline full-immersion accelerated corrosion crushing device. According to the invention, a mode of firstly corroding and then pressurizing is adopted, the corrosion crushing process of the pipeline in an extreme environment is simulated, and the experiment precision is high.

The invention relates to a pressurization and dehumidification device for a cabin of a marine wind turbine generator system. The pressurization and dehumidification device comprises a booster pump, a heat exchanger, a PLC and sensors for detecting and collecting pressure signals and humidity signals in a cabinet cover, wherein the booster pump and the heat exchanger are arranged in the cabinet cover. The booster pump is connected with the heat exchanger through a gas pipeline. Suction pipes are arranged on the side face of the booster pump. Suction end openings of the suction pipes are connected with an air inlet formed in the outer wall of the cabinet cover. Exhaust pipes are arranged on the side face of the heat exchanger. Exhaust end openings of the exhaust pipes are arranged in the cabinet cover. A drainage pipeline communicating with the exterior of the cabinet cover is arranged at the bottom of the heat exchanger. The booster pump, the heat exchanger and the sensors are connected with the PLC through cables. By the adoption of the pressurization and dehumidification device, the functions of increasing the internal pressure of the cabinet cover and reducing the air humidification of the cabinet cover are achieved, at the moment, the internal pressure of the cabinet cover is greater than the external pressure of the cabin cover, external damp air can be isolated, and erosion of salt fog to internal parts of the cabinet cover is prevented effectively.

The underwater weapon launching power device of the present invention is an accumulator-driven hydraulic motor and a rotary pump. Before the underwater weapon is launched, the motor is started, and under the action of the hydraulic pump, the hydraulic oil in the oil tank passes through the hydraulic pump, the first one-way valve , the spherical stop valve flows into the gas accumulator; the pressure gauge switch is connected with the pressure gauge, and the other end of the pressure gauge switch is connected with the outlet of the first one-way valve; when the reading of the pressure gauge reaches the preset value, it is closed Electric motor; when launching an underwater weapon, the electro-hydraulic reversing valve is energized to act, and the high-pressure oil in the gas accumulator enters the high-pressure port of the hydraulic motor through the spherical stop valve and the electro-hydraulic reversing valve, driving the hydraulic motor and driving it to rotate The water pump rotates at an accelerated speed, the inlet of the rotary water pump is connected with the seawater, the outlet of the rotary water pump is connected with the launch tube of the water cabin, and the large flow of seawater is output from the rotary water pump to the launch tube of the water cabin, and the underwater weapon is pushed out of the tube. The underwater weapon launching power device of the invention has low noise, low manufacturing cost and can avoid cabin pressurization.