A compressor, more particularly, a scroll compressor provides structures that may enhance centrifugal stiffness at a contact point between a fixed scroll and an orbiting scroll. The compressor may include an orbiting scroll having an orbiting scroll wrap wound around a radial-direction inner area from a radial-direction outer area; and a fixed scroll having a fixed scroll wrap wound around the radial-direction inner area from the radial-direction outer area. A surfacing part may be configured to narrow a distance between the orbiting scroll wrap and the fixed scroll wrap may be formed in a predetermined section of the orbiting scroll or fixed scroll wrap.

According to a hermetic electric compressor of the present invention, a discharge port 66a is placed downstream of eddying flow from the joint portion 66b, a bent portion 66c is formed between the joint portion 66b and the discharge port 66a, an imaginary plumb line 66aY of an opening surface formed on the discharge port 66a is oriented to a circumferential direction of a hermetic container 10, and fluid having a small lubrication oil content is taken out from the discharge port 66a utilizing eddying flow of mixture fluid of refrigerant and lubrication oil in a gap space between a compressing mechanism 20 and a motor section 30, thereby reducing a discharge amount from the hermetic container 10.

In the operation of a refueling screw compressor, when load conditions constantly fluctuate or when the rotation speed control of a cooling fan is performed, it is difficult to accurately perform a diagnosis predicted from measurement results of devices inside the compressor, so a diagnostic mode stably creates an operating condition under which an accurate diagnosis can be performed. In the refueling screw compressor, a discharge electric valve is provided downstream of an air cooler, and an air release electric valve and a dedicated orifice are provided to connect an oil separator inner space and a suction throttle valve space. In the diagnostic mode, the discharge electric valve is closed, the air release electric valve is opened, and while an upstream pressure of the oil separator is maintained at a specified pressure, a rotation speed control operation of a compressor body and the diagnosis of internal devices are performed.

In the operation of a refueling screw compressor, when load conditions constantly fluctuate or when the rotation speed control of a cooling fan is performed, it is difficult to accurately perform a diagnosis predicted from measurement results of devices inside the compressor, so a diagnostic mode stably creates an operating condition under which an accurate diagnosis can be performed. In the refueling screw compressor, a discharge electric valve is provided downstream of an air cooler, and an air release electric valve and a dedicated orifice are provided to connect an oil separator inner space and a suction throttle valve space. In the diagnostic mode, the discharge electric valve is closed, the air release electric valve is opened, and while an upstream pressure of the oil separator is maintained at a specified pressure, a rotation speed control operation of a compressor body and the diagnosis of internal devices are performed.

The disclosure relates to a device for the wireless transmission of a signal transmitted from a sensor to a supply apparatus (for example a control system) via at least one line, having electrical connections for the line and having an electronic transmitter apparatus that has an electronic circuit for tapping the signal and a transmitter with which the tapped signal can be wirelessly transmitted. The device is in the form of a plug adapter that has a plug housing, wherein a first plug part and a second plug part are attached to the plug housing, wherein the first plug part is connected to the second plug part via at least one signal conductor arranged within the plug housing for wired transmission of the signal, and wherein the electronic transmitter apparatus is arranged in the plug housing in order to tap off the signal.

The disclosure relates to a device for the wireless transmission of a signal transmitted from a sensor to a supply apparatus (for example a control system) via at least one line, having electrical connections for the line and having an electronic transmitter apparatus that has an electronic circuit for tapping the signal and a transmitter with which the tapped signal can be wirelessly transmitted. The device is in the form of a plug adapter that has a plug housing, wherein a first plug part and a second plug part are attached to the plug housing, wherein the first plug part is connected to the second plug part via at least one signal conductor arranged within the plug housing for wired transmission of the signal, and wherein the electronic transmitter apparatus is arranged in the plug housing in order to tap off the signal.

An enclosure system may be formed of a lightweight panel with a thin non-porous membrane that enables the extraction and leak detection of hazardous gases from housing equipment such as vacuum pumps, valves, abatement equipment and the like. Additionally, the enclosure system includes a one or multiple layers of wire mesh which prevent projectiles with a high kinetic energy from escaping from the housing equipment thereby minimising the risk of an explosion causing parts or panels to be ejected from the enclosure system.

An enclosure system may be formed of a lightweight panel with a thin non-porous membrane that enables the extraction and leak detection of hazardous gases from housing equipment such as vacuum pumps, valves, abatement equipment and the like. Additionally, the enclosure system includes a one or multiple layers of wire mesh which prevent projectiles with a high kinetic energy from escaping from the housing equipment thereby minimising the risk of an explosion causing parts or panels to be ejected from the enclosure system.

A control system comprising: a suction line; an exhaust line; an operating liquid line; a liquid ring pump comprising a suction input coupled to the suction line, an exhaust output coupled to the exhaust line, and a liquid input coupled to the operating liquid line; a motor configured to drive the liquid ring pump; a first sensor configured to measure a first parameter of an exhaust fluid of the liquid ring pump; a second sensor configured to measure a second parameter of a gas being received by the liquid ring pump via the suction line; and a controller operatively coupled to the first sensor, the second sensor, and the motor, and configured to control the motor based on sensor measurements of the first sensor and the second sensor.

Provided is a degradation diagnostic device, which is configured to perform a diagnosis for degradation of a compressor including a compression mechanism unit to be driven along with a rotational motion of a rotary shaft, and a shell, which is configured to form an outer casing. The degradation diagnostic device includes a vibration detection device to be fixed onto an outer wall of the shell at a position at which the compression mechanism unit is located. The vibration detection device includes: a vibration sensor, which is configured to detect vibration of the compressor; a sensor holding unit including the vibration sensor; a base portion to which the sensor holding unit is connected; and a plurality of projecting portions, which are formed on a surface of the base portion on a side opposite to the sensor holding unit and to be brought into contact with the outer wall.