A downhole-type system includes a rotatable shaft; a sensor that can sense an axial position of the shaft and generate a first signal corresponding to the axial position of the shaft; a controller coupled to the sensor, in which the controller can receive the first signal generated by the sensor, determine an amount of axial force to apply to the shaft to maintain a target axial position of the shaft, and transmit a second signal corresponding to the determined amount of axial force; and multiple magnetic thrust bearings coupled to the shaft and the controller, in which each magnetic thrust bearing can receive the second signal from the controller and modify a load, corresponding to the second signal, on the shaft to maintain the target axial position of the shaft.

A high and low-pressure integrated air pump includes a single housing including an air inlet and an air outlet. A high-pressure pump is disposed within the housing and in fluid communication with the air inlet, and uses a first outlet passage to discharge to the air outlet. A low-pressure pump is also disposed within the housing and in fluid communication with the air inlet, and uses a second outlet passage to discharge to the air outlet.

An electrical submersible pump has a tubular pump housing containing centrifugal pump stages and a rotatable shaft. A bearing mounts in the housing and has a shaft passage through which the shaft extends. A sensor hole extends through the housing and into the bearing. A temperature sensor is located within the sensor hole. The sensor hole has a closed end radially outward from the shaft passage. A sensor line leads from the temperature sensor to a sensing unit mounted at an upper or a lower end of the pump assembly.

A vacuum pump that is suitable to achieve uniformity of pressure in the chamber and improve the compression ratio, and a vacuum exhaust system using the vacuum pump. A vacuum pump includes: a cylindrical inner housing; a cylindrical stator placed outside the inner housing; a cylindrical shaft rotationally disposed between the inner housing and the stator; a motor configured to drive and rotate the shaft about an axis thereof; rotor blades in multiple stages disposed on an outer circumference surface of the shaft; and a cylindrical outer housing that is disposed outside the rotor blades in multiple stages and has an inlet port and an outlet port. A seal mechanism is provided in a gap between an outer circumference surface of the inner housing and an inner circumference surface of the shaft to inhibit an inflow of gas into the gap.

A vacuum pump exhaust system and an exhausting method of the vacuum pump supply a purge gas to the vacuum pump such that an amount of the purge gas satisfies one of following conditions: an amount of the purge gas flowing at a higher velocity than a backflow velocity of gas exhausted by the vacuum pump on at least a part of a downstream side of the temperature sensor unit, and an amount of the purge gas having a pressure of one of an intermediate flow and a viscous flow around the temperature sensor unit. The exhaust system further includes a purge gas supply unit capable of controlling a flow rate of purge gas introduced into the vacuum pump. This configuration can prevent process gas from flowing backward so as to change the composition around the temperature sensor unit, thereby accurately measuring the temperature of the rotating portion.

A smart air pump comprises a housing defining an accommodating chamber. A main air pump is located in the accommodating chamber for inflating or discharging air from an inflatable body. The main air pump includes a cover defining an inlet and an outlet port. The cover divides the accommodating chamber into an impeller and a driving chamber. An air replenishing pump is located in the accommodating chamber. A driving switch, located in the driving chamber, connects to the main air pump. A central control unit electrically connects to the main air pump, the air replenishing pump, and the driving switch. The central control unit comprises a time control module configured to initiate periodic replenishment of air to the inflatable body. The time control module has a setting module and a counting module. An inflatable device including a smart air pump is also disclosed herein.

The present disclosure relates to a motor driving apparatus and an air conditioner including the same. The motor driving apparatus and the air conditioner including the same according to an embodiment of the present disclosure include: a switching device disposed between an inverter and a motor; and a controller, which in response to windings of the motor being switched from a first connection to a second connection, controls an operating frequency of the motor to be less than or equal to a first frequency, and in response to the windings of the motor being switched from the second connection to the first connection, controls an operating frequency of the motor to be less than or equal to a second frequency which is less than the first frequency. Accordingly, burnout of the switching device for switching connection of the motor windings may be prevented.

An electric air pump system includes a housing in fluid communication with an inflatable body, a first valve, a first air pump for inflating and deflating the inflatable body, a second air pump for inflating the inflatable body, an air pressure sensor configured to detect the inner pressure of the inflatable body, and first and second prompting devices. The system also includes a control device electrically coupled to the first and second air pumps, the air pressure sensor, and the first and second prompting devices. The first prompting device outputs a first indication signal when the inner pressure is less than or equal to a first air pressure threshold and the second prompting device outputs a second indication signal when the second air pump inflates the inflatable body.

An electric blower includes a motor including a rotor having a rotation shaft, and a stator provided to surround the rotor, a moving blade mounted at one end side of the rotation shaft in the axial direction of the rotation shaft, a bearing portion provided between the moving blade and the stator in the axial direction and rotatably supporting the rotation shaft, and a frame. The frame includes a motor housing portion housing the stator, a bearing housing portion housing the bearing portion, a wall formed between the motor housing portion and the bearing housing portion and facing the moving blade, and a hole passing through the wall. The electric blower further includes a first air path outside the frame, and a second air path inside the frame. An air volume in the first air path is larger than an air volume in the second air path.

A washer system, including: a washer having controllable operational parameters; an optical camera which provides optical data at the washer; a controller configured to: communicate with the washer and the optical camera, receive the optical data from the optical camera, and control the operational parameters of the washer. The washer system includes a processor configured to: receive the optical data, identify, using a machine learning model, types of laundry and quantities of the laundry loaded in the washer using received optical data from the optical camera and data sets stored in a data bank, and communicate with the controller to control the washer to operate using one or more specified operational parameters based on the types of laundry and the quantities of laundry.