An automatic self-driving pump system features a pump/motor/drive detector and an automatic self-driving and control design/setup module. In operation, the pump/motor/drive detector receives sensed signaling containing information about a pump/drive for operating in a hydronic pump system, e.g., stored in and sensed from a signature chip or barcode installed that can be scanned by a scanner, and provides corresponding database signaling containing information about parameters for providing automatic pump control design, setup and run to control the pump/drive for operating in the hydronic pump system, based upon the sensed signaling received. The automatic self-driving and control design/setup module receives the corresponding database signaling, and provides control signaling containing information for providing the automatic pump control design, setup and run to control the pump/drive for operating in the hydronic pump system, based upon the corresponding database signaling received.

A paint sprayer includes an end bell, a motor connected to the end bell, a pump drive connected to the end bell, a pair of protrusions attached to an extending from the end bell such that each protrusion is cantilevered from the end bell, and a pump assembly comprising a pair of mounting holes and containing a piston. The pair of mounting holes is adapted to receive and slide onto the pair of protrusions to mount the pump assembly on the end bell as well as slide off of the pair of protrusions to remove the pump assembly from the end bell. The pump drive is configured to covert rotational motion output by the motor to reciprocal motion. The pump assembly is configured to pump paint when reciprocated by the pump drive while mounted on the end bell.

An analysis method of absolute energy efficiency and relative energy efficiency of the compressed air system. For the compressed air system operating in a form of a single compressor, a gas flow rate and a corresponding operating power of the compressor operating in the single compressor model are measured under a specified flow rate. Meanwhile, influencing factors of the compressor operation are monitored. The absolute energy efficiency of the compressor is defined, and a curve of the absolute energy efficiency of the compressor varying with the operating time versus the above factors are plotted in a same coordinate system. Obtaining absolute energy efficiency data of the compressor in a corresponding state. By analyzing the absolute energy efficiency under corresponding conditions and based on the corresponding chart, the actual unit consumption of a given single compressor and its changing rule under different production and environmental operating conditions can be intuitively analyzed.

A power-saving optimization operation method and switching point determining method for a water pump unit. In the parallel water pump units, k water pumps converters form a sub-pump unit A. The water output Q.sub.1 of a first water pump in the sub-pump unit A, the input power P.sub.1 of the frequency converter corresponding to Q.sub.1 and the operating frequency f.sub.1 of the frequency converter corresponding to Q.sub.1 are recorded, where Q.sub.A=Q.sub.1, P.sub.A=P.sub.1. The Q.sub.A-P.sub.A curve of an operating water pump serves as the working curve w.sub.1, where Q.sub.A=mQ.sub.1 and P.sub.A=mP.sub.1, and k≥m≥2. The working curve w.sub.m of m operating water pumps operating at the same frequency is obtained, where f.sub.1=f.sub.2= . . . =f.sub.m. The intersection point of the working curve w.sub.m-1 and the working curve w.sub.m is the optimal switching point between m-1 operating water pumps and m operating water pumps under the constant pressure H.sub.s.

A power-saving optimization operation method and switching point determining method for a water pump unit. In the parallel water pump units, k water pumps converters form a sub-pump unit A. The water output Q.sub.1 of a first water pump in the sub-pump unit A, the input power P.sub.1 of the frequency converter corresponding to Q.sub.1 and the operating frequency f.sub.1 of the frequency converter corresponding to Q.sub.1 are recorded, where Q.sub.A=Q.sub.1, P.sub.A=P.sub.1. The Q.sub.A−P.sub.A curve of an operating water pump serves as the working curve w.sub.1, where Q.sub.A=mQ.sub.1 and P.sub.A=mP.sub.1, and k≥m≥2. The working curve w.sub.m of m operating water pumps operating at the same frequency is obtained, where f.sub.1=f.sub.2= . . . =f.sub.m. The intersection point of the working curve w.sub.m−1 and the working curve w.sub.m is the optimal switching point between m−1 operating water pumps and m operating water pumps under the constant pressure H.sub.s.

A system attachable to a refrigeration circuit includes a recovery pump attachable to the refrigeration circuit to remove refrigerant. The recovery pump includes a pump, an electric motor, a battery pack, and a recovery pump controller for controlling the operation of the electric motor. The recovery pump controller has a first communication interface. The system further includes an accessory attachable to the refrigeration circuit concurrently with the recovery pump. The accessory includes a sensor for detecting a characteristic value of the refrigeration circuit, and an accessory controller electrically connected with the sensor to receive a signal corresponding with the characteristic value of the refrigeration circuit. The accessory controller has a second communication interface to communicate the signal to the recovery pump controller via the first and second wireless interfaces. The recovery pump controller controls the operation of the electric motor based upon the signal received from the accessory.

Actuation of a hydraulic device that provides a hydraulic supply to a torque-transmitting device is provided. An electrically operated pump is operated in a first operating state. The first operating state; has a primary pump rotational speed that provides a first fluid pressure to the torque-transmitting device via a fluid tract. A switchover process is initiated to operate the electrically operated pump device in a second operating state based on a second fluid pressure and a second fluid target pressure. The second operating state has a secondary pump rotational speed that provides the second fluid pressure to the torque-transmitting device via the fluid tract. During operation of the hydraulic device, the secondary pump rotational speed for the switchover process is determined based on a first power value. The first power value includes electrical pump power of the pump device in a preceding switchover process.

Method for operating a pump system preferably comprising more than one pump, comprising the steps of: Obtaining at least one target parameter to be optimized based on target values of each pump; Obtaining an operation target, wherein the operation target is provided by one or more of the pumps operating each with an individual operation parameter; Acquiring a relationship for more than one and preferably all of the pumps between the operation parameter and the target value and determine a target function; Determining a maximum/minimum of the target function and obtaining operation parameter of at least one pump; and Controlling of at least one pump to operate with the obtained operation parameter to optimize the target parameter.

A paint sprayer includes an end bell, a motor connected to the end bell, a pump drive connected to the end bell, a pair of protrusions attached to an extending from the end bell such that each protrusion is cantilevered from the end bell, and a pump assembly comprising a pair of mounting holes and containing a piston. The pair of mounting holes is adapted to receive and slide onto the pair of protrusions to mount the pump assembly on the end bell as well as slide off of the pair of protrusions to remove the pump assembly from the end bell. The pump drive is configured to covert rotational motion output by the motor to reciprocal motion. The pump assembly is configured to pump paint when reciprocated by the pump drive while mounted on the end bell.

Provided is a vacuum pump apparatus which allows reductions in thickness, weight, size, and cost of a vacuum pump control device. In the vacuum pump apparatus, a pump main body unit and a control unit which controls driving of the pump main body unit are integrated with each other. The vacuum pump apparatus has a configuration in which a spacer configured to support a load applied to a housing of the control unit is provided between a base of the pump main body unit and the housing of the control unit.