Abstract:
본 발명은, 현재 압축기 온도를 결정하기 위하여 압축기(2)의 어드미션-압력 및 카운터-압력이 고려되자마자, 적어도 압축기의 동작 중에 항상 현재 압축기 온도가 결정되고, 늦어도 임계 온도에 도달한 때에 압축기(2)의 전원이 차단되도록 구성된, 폐쇄된 레벨 조절 설비 내부의 압축기(2)를 제어하기 위한 방법에 관한 것이다. 바람직하게, 압축기 동작 중에 경과된 각각의 단위 시간(dt) 후에 현재 압축기 온도(t)가 값(dT)으로 맞추어지고, 상기 값은 카운터-압력과 어드미션-압력 간 압력차(P counter - P admission )에 의존한다.
Abstract:
The invention relates to a method for controlling a compressor (2) in a closed level adjustment system, wherein the actual compressor temperature is continuously determined, at least during operation of the compressor, and the compressor (2) is disconnected when it reaches a threshold temperature. Admission pressure and counter-pressure of the compressor are taken into account in order to determine the actual compressor temperature. Preferably, the actual compressor temperature t is adapted by a value dT after each unit of time has elapsed while the compressor is operating, said value depending upon the difference between counter pressure and admission pressure(pgegen - pvor).
Abstract:
A rod-pump control device is disclosed. The claimed rod-pump control device uses fuel or air usage for gas units, and can use pressure. The sensors work as the primary trigger to indicate a pump-off condition on an oil and gas well. These sensors can be used as stand-alone triggers or in conjunction with other sensors to more accurately monitor pump efficiency. When the pump-controller starts to indicate an inefficient pump condition, it will remove power to disengage an electric clutch or send a signal to an engine controller to stop. An adjustable algorithm will use percentage change of off time, dependent on actual run time compared to a user definable target time to keep the pump operating at peak efficiency.
Abstract:
A cryopump includes an accommodation space for a condensed layer of gas, a first-stage cryopanel having an inner surface of the first-stage cryopanel disposed so as to surround the accommodation space, and a second-stage cryopanel disposed so as to be surrounded by the inner surface of the first-stage cryopanel together with the accommodation space. A first-stage heat load is incident on the inner surface of the first-stage cryopanel from outside the cryopump through an intake port, and the gas enters the accommodation space from outside the cryopump. The first-stage cryopanel is cooled to a temperature higher than a condensation temperature of the gas, the second-stage cryopanel is cooled to a temperature of the condensation temperature or less, and the condensed layer is deposited. The cryopump monitors the amount of condensed gas in the accommodation space based on a change in the first-stage heat load.
Abstract:
An apparatus for the vacuum packaging of food, which includes a base structure which defines a vacuum chamber which can be connected to a vacuum pump. Between the vacuum chamber and the vacuum pump, at least one air filtration device is provided which has elements for varying at least one thermo-fluid dynamics parameter of the flow of air extracted from the vacuum chamber by the vacuum pump, in order to enable the elimination, from the air extracted from the vacuum chamber, of water, biochemical liquids and biological materials.
Abstract:
Provided is a configuration which prevents an engine from being unable to start in the state in which dew condensation occurred in a fuel injection pump and froze. The present invention relates to a fuel injection pump which is provided with a pump body and a hydraulic head and driven by an engine, and is characterized in that while the engine is in operation, the temperature of the hydraulic head is increased to a dew-point temperature or higher. Consequently, it is possible to increase the temperature of the hydraulic head and remove water in the fuel injection pump while the engine is in operation. Accordingly, the engine can be prevented from being unable to start in the state that dew condensation occurred in the fuel injection pump and froze.
Abstract:
Process for regulating a compressor with motor for a refrigerating system, where the temperature of the cooling site is regulated through an on-off motor mode if the temperature in the compressor exceeds an upper temperature threshold. In addition, the temperature of the cooling site is regulated through a continuous on mode of the motor as soon as the motor has cooled to a lower temperature threshold. The controller converts a variable corresponding to the cooling requirement of the cooling site into a switch signal for a valve, which results in clocked opening and closing of the valve, or uses a frequency converter, which controls the cooling liquid flow through the compressor by regulating the voltage and the frequency of the motor in that the frequency converter converts a variable corresponding to the cooling requirement of a cooling site into a voltage and a frequency for the motor.
Abstract:
Method and equipment to control operating temperature of an air compressor. A compressor element compresses air and oil and supplies it to an oil separator. In the separator, the air and oil are separated. Oil is led to a circulating pipe and returned to the compressor element. When necessary, at least some of the oil flowing in the oil circulating pipe is supplied to cooling, which is used for controlling operating temperature of the compressor such that it is as low as possible, but nevertheless so high that no condensation point is reached. The amount of oil to be supplied to cooling is controlled by a thermostatic valve based on a change in dimension of a controlling element such that dimensions of the controlling element are changed by an external command.
Abstract:
Provided is an air conditioning apparatus that is capable of suppressing increases in volume and cost of the apparatus and performing more suitable overheating protection. An electric compressor is an inverter-integrated electric compressor integrally including a compressor, an electric motor that drives the compressor, and an inverter including a temperature sensor that detects the temperature in the vicinity of a semiconductor switching device, wherein a controller estimates a discharge temperature of the compressor on the basis of a correlation of respective pressure loading characteristics for the detected temperature of the inverter, for the rotational speed of the compressor, and for the motive force of the compressor in a refrigerating cycle.
Abstract:
An air pump has an air tank (20) for temporarily storing air from a pump unit (12) before discharging the air. The air tank has a tank body having a top wall (40) on which the pump unit is placed, and a peripheral wall (42) extending downward from the top wall. The tank body has a downward facing opening. The air tank further has a metallic bottom wall member (46) engaged with the bottom surface of the peripheral wall so as to close the opening of the tank body. Bolts are passed through the metallic bottom wall member and into a metallic part of the pump unit and tightened to connect and secure the pump unit and the air tank to each other.