A pressure boosting device increases pressure of a fluid flowing through a conduit (5) and includes a booster pump (2), a control device (12), controlling the booster pump (2), as well as a pressure sensor (8) arranged at the exit side of the booster pump (2) and connected to the control device. The control device (12) is configured to control the booster pump, in an operating region, in a start-stop operation, a switching off of the booster pump (2) when reaching an upper pressure limit value (P.sub.1) and a switching on of the booster pump (2) when reaching a lower pressure limit value (P.sub.2). The control device (12) is further configured in a start-stop operation to automatically adapt at least one pressure control parameter (P.sub.1, P.sub.2) of the control device (12) on the basis of the temporal course of at least one pressure value (P) detected by the pressure sensor.

A dry vacuum pump regeneration apparatus includes an intake pipe connected to an intake port of a dry vacuum pump; an exhaust pipe connected to an exhaust port of the dry vacuum pump; an auxiliary vacuum pump configured to evacuate an interior of the dry vacuum pump upon being stopped via the exhaust pipe; a plasma generator configured to cause a first gas to pass through the plasma generator to generate a plasma in an atmosphere of the passing first gas, and release a radical of the first gas to the intake port via the intake pipe; a first gas heating device configured to cause a second gas to pass through the first gas heating device, heat the passing second gas, and release the heated second gas to the intake port via the intake pipe; and a bypass pipe connected to the intake pipe and the exhaust pipe.

A compressor includes: a container forming an outer shell of the compressor; a terminal portion projecting from an upper surface of the container, and configured to supply electric power to an inside of the container; a rod projecting from the upper surface of the container; a terminal cover covering the terminal portion to protect the terminal portion, and fixed to the container by the rod; and a thermal protector configured to detect a temperature of the compressor. The thermal protector is brought into contact with and fixed to a flat outer surface of the container that is formed between the terminal portion and the rod.

A system for controlling a fan is provided, which includes a processor, a driver, a power supply module, an instruction output module and a level control module. The power supply module is configured to supply power to the level control module when the server is started up and when the server is shut down. The instruction output module is configured to output a mode control instruction. The level control module is configured to output a first level to the PWM pin and output a second level to the TACH pin based on the mode control instruction and then control the power supply module to supply power to the processor and the driver. The processor is configured to determine a mode of the fan based on the first level and the second level and control a rotation speed of the fan based on the mode of the fan.

A fan control device with power saving mode and start-up setting having a control chip, the chip at least includes a main control circuit for controlling a speed of the fan through receiving an external voltage level, a protection control module for sending an alarm signal to the main control circuit while a detected ambient temperature being higher than a preset temperature, and a sleep mode control module electrically coupled to an externally adjustable voltage threshold circuit, wherein the sleep mode control module compares an input voltage threshold from the externally adjustable voltage threshold circuit and an input voltage detected by the protection control module, and sends a control signal to the main control circuit depended on comparing results of the sleep mode control module for controlling operation modes of the fan.

A ventilator having a rotor is mounted in a rotatable manner around an axis of rotation. The rotor includes a plurality of blade-like rotor blades arranged around the axis of rotation. The ventilator includes a sensor device for detecting an object approaching one of the plurality of rotor blades, and a control device that receives signals from the sensor device. The control device extrapolates a trajectory of the object from a position x and a speed v of the object, and adjusts an angular position or rotational speed n of the rotor to allow the object to continue moving along its trajectory without colliding with one of the plurality of rotor blades.

A concealed office fan lamp is provided, which includes a stop device, a support and a fan blade. A lamp is arranged at the bottom of the support, a cavity is arranged in the support, the fan blade is electrically connected with a driving mechanism to make it rotatably arranged in the cavity, and the stop device is arranged on the support and/or the fan blade to detect the motion state of the fan blade. According to the motion state, the fan blade is stopped and hidden in the cavity. By providing a stop device on the fan lamp, the fan blade can be accurately stopped and hidden in the cavity, the person under the fan lamp cannot see the fan blade when the fan lamp stops working, making the fan lamp more beautiful as a whole.

Various fan blade locking devices which operate to lock the blades of a fan in place and disconnect power to the fan. The locking device has an actuable bolt that, when in the locked position, extends to and contacts the fan blades and thereby stops the fan blades from turning. Additionally, the bolt has a contact washer coupled thereto such that the contact washer can engage with and disengage from a switch, thereby completing or interrupting a circuit supplying power to the fan, which allows for the locking device to prevent the fan from being actuated while the bolt is in contact with the fan blades.

An automatically opening and closing inflatable holiday ornament includes a box that has a base, a plurality of side panels hingedly connected to the base, and a top portion connected to each of the plurality of side panels. The ornament further includes a motor, a plurality of pull cables, such that each of the plurality of pull cables has a first end operatively connected to the motor and a second end connected to one of the plurality of side panels. The ornament also includes a first blower, an inflatable disposed in the box and surrounding the first blower such that operation of the first blower blows air into the inflatable to inflate the inflatable, and a controller operatively connected to the motor and to the first blower such that the controller controls operation of the motor and the blower.

A motor drive control device 1 includes a drive voltage generation circuit 13 configured to generate a drive voltage Vin based on a first supply voltage Vdc inputted to a first terminal P1 and generate the drive voltage Vin based on a second supply voltage inputted to a second terminal P2 when a supply of the first supply voltage Vdc is stopped, a control circuit 21 configured to be operable by the drive voltage Vin, generate a drive control signal Sd based on a drive command signal Sc, generate a motor driving information signal So and output the motor driving information signal So from a third terminal P3 and a motor drive circuit 10 configured to output a drive signal to the motor 3, in which the control circuit 21 monitors the first supply voltage Vdc and outputs history information 300 relating to operation of the motor 3 from the third terminal P3 as the motor driving information signal So upon detecting that the supply of the first supply voltage Vdc is stopped.