An anti-air-return fan system includes a motor, a driving control circuit, and a rotation judgment circuit. The driving control circuit is electrically connected to the motor. The driving control circuit has a driving signal for driving the motor to rotate according to the driving signal. The rotation judgment circuit outputs a judgment signal to the driving control circuit when detecting that the motor reversely rotate. The driving control circuit executes a braking according to the judgment signal. The driving control circuit drives the motor to operate when the rotation judgment circuit detects that the motor doesn't rotate reversely.

A plural-fans driving apparatus includes a controller, a first fan driving circuit, a second fan driving circuit and a protection and input interface circuit. The controller controls the first fan driving circuit to drive a first fan apparatus. The controller controls the second fan driving circuit to drive a second fan apparatus. The protection and input interface circuit is used to protect the first fan driving circuit and the second fan driving circuit. The protection and input interface circuit is a common input interface for the first fan driving circuit and the second fan driving circuit.

A composite cooling fan includes a frame, a fan blade and a lateral valve. The frame has an air hole penetrating the frame and a lateral air outlet locating on one side of the frame and connecting with the air hole. The fan blade is disposed in the air hole and includes an impeller, multiple axial blades surrounding the impeller and multiple centrifugal blades surrounding the axial blades. The lateral valve is disposed on the lateral air outlet and includes a valve stem and a switch baffle linked with the valve stem. The valve stem is used for making the switch baffle at the lateral air outlet open or close.

It is known to mount an electric motor (1), in particular a blower motor, with oscillation decoupling. The electric motor (1) has a motor housing (4), in particular a pole housing, which has at least one connecting lug (10), which protrudes radially from the motor housing (4) and on which a decoupling element (20) is fitted, via which decoupling element the motor housing (4) is supported on an outer housing (5, 6). In order to rule out the risk of a collision between the connecting lug (10) and the outer housing (5, 6), the invention proposes an apparatus for oscillation-decoupled mounting, in which the decoupling element (20) surrounds the connecting lug (10; 11, 12) in the form of a sleeve with a casing part (21), wherein the casing part (21) is supported, via at least one web (30, 31; 40, 41; 50, 51; 55, 56), on an outer part (26), which surrounds the casing part (21) in the form of a frame and is accommodated in the outer housing (5, 6), which is preferably formed in two parts. The apparatus for oscillation-decoupled mounting of an electric motor is intended in particular for blower motors of motor vehicle air conditioning systems.

The present invention relates to a fan control system, which comprises a controller and a detection circuit. The controller controls a fan. The detection circuit detects at least one state of the fan control system, and generates a confirmation signal according to the at least one state. The confirmation signal represents the state of the fan control system.

Disclosed is a method for protecting a heat dissipation fan of a projecting device, including: when a heat dissipation fan is in a working state, obtaining fall-related information when a projecting device is falling; determining fall-related information of the heat dissipation fan according to the fall-related information of the projecting device; terminating the operation of the heat dissipation fan when the fall state information of the heat dissipation fan is in a falling state; resuming the operation of the heat dissipation fan when the fall state information of the heat dissipation fan is that the fall ends. Further disclosed is an apparatus for protecting a heat dissipation fan of a projecting device, corresponding to the method.

A voltage stabilizing module for multi power source input is compatible with multiple input power sources including DC power source and/or AC power source and comprises a plurality of receiving ends, a power source selection unit and a voltage conversion unit. The receiving ends receive the input power sources. The power source selection unit is coupled with the receiving ends to receive the input power sources and sets at least one of the input power sources as a working power source. The voltage conversion unit receives the working power source and keeps the working power source at a working voltage level to act as a voltage signal outputted to a loading.

An estimation device for estimating a process gas condition in a system for pumping gas from a vacuum chamber into which the gas is injected to perform a treatment process by a vacuum pump attached to the vacuum chamber through a vacuum valve, comprises: a computer having a processor and a memory, wherein the computer estimates a first process gas condition including an injected gas type and a gas flow rate based on correlation data between a valve body opening degree of the vacuum valve and an effective exhaust speed of the system regarding a predetermined gas type and a chamber pressure of the vacuum chamber.

A method of feedthrough and overcurrent protection of a sealed compressor used in a transport climate control system (“TCCS”) is provided. The TCCS includes a climate control circuit with a sealed compressor. The sealed compressor includes an outer housing and an electrical motor within the outer housing. The method includes operating the sealed compressor to compress a working fluid by supplying electrical power to the electric motor of the sealed compressor via a sealed electrical feedthrough in the outer housing of the sealed compressor. The method also includes detecting an operating parameter of the sealed electrical feedthrough, and determining whether the sealed electrical feedthrough is in a melting condition based on the detected operating parameter. Also, the method includes adjusting operation of the climate control circuit upon determining that the sealed electrical feedthrough is in the melting condition until the sealed electrical feedthrough is no longer in the melting condition.

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.