A rotary compressor (700) and a refrigeration cycle device (1000) having same are provided. The rotary compressor comprises: a liquid reservoir (1), a first direction control assembly (49), and a compression mechanism. The compression mechanism comprises two cylinders and two gas injection holes, in which a sliding vane of one cylinder is pressed against an outer circumferential wall of a piston in the cylinder and a gas injection hole is used for injecting a refrigerant to the cylinder, while the sliding vane of the other cylinder is optionally in contact with or separate from the piston in the cylinder, the other gas injection hole is used for unidirectionally injecting the refrigerant into the cylinder; a first valve port (491) of the first direction control assembly (49) is connected to the gas suction port of the other cylinder, a second valve port (492) thereof is connected to liquid reservoir (1), a third valve port (493) thereof is in communication with the exhaust hole, and the second valve port (492) and the third port (493) are optionally in communication with the first valve port (491).

A variable capacity compressor (100), a cooler (200) including same, and a method and system for controlling a variable capacity compressor are disclosed. An electronic control (50), a thermostat (30) and a power source (10) are disclosed, the power source including a neutral terminal and a phase terminal, the thermostat including a first terminal and a second terminal, and the electronic control including a phase feed input and a neutral feed input, the neutral terminal of the power source electrically connected to the neutral feed input of the electronic control and the phase terminal of the power source electrically connected to the first terminal of the thermostat, the second terminal of the thermostat connected electrically to the phase feed input of the electronic control, the thermostat configured to feed and un-feed selectively the electronic control, the electronic control activating and deactivating selectively the compressor and controlling its cooling capacity.

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.

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.

System and methods are provided and include a compressor operable in a refrigeration circuit, a first sensor detecting high-side data indicative of a high-side operating condition of a high-pressure side of the refrigeration circuit, a second sensor detecting low-side data indicative of a low-side operating condition of a low-pressure side of the refrigeration circuit, and processing circuitry. The processing circuitry receives the high-side data and the low-side data, determines a high-side fault, a low-side fault, a severe high-side fault, or a severe low-side fault based on the high-side data and the low-side data, operates the compressor in a limp-along mode by restricting power to the compressor or reducing a capacity of the compressor in response to determining at least one of the high-side fault and the low-side fault, and shuts down the compressor in response to determining at least one of the severe high-side fault and the severe low-side fault.

System and methods are provided and include a compressor operable in a refrigeration circuit, a first sensor detecting high-side data indicative of a high-side operating condition of a high-pressure side of the refrigeration circuit, a second sensor detecting low-side data indicative of a low-side operating condition of a low-pressure side of the refrigeration circuit, and processing circuitry. The processing circuitry receives the high-side data and the low-side data, determines a high-side fault, a low-side fault, a severe high-side fault, or a severe low-side fault based on the high-side data and the low-side data, operates the compressor in a limp-along mode by restricting power to the compressor or reducing a capacity of the compressor in response to determining at least one of the high-side fault and the low-side fault, and shuts down the compressor in response to determining at least one of the severe high-side fault and the severe low-side fault.

A method is provided that includes installing a compressor in a refrigeration system and determining a condenser temperature difference using processing circuitry. The method also includes checking for an overcharge condition or a condenser fan blockage condition when the condenser temperature difference is greater than a high condenser temperature difference value. The method also includes determining a discharge superheat temperature using the processing circuitry and checking for the overcharge condition or the condenser fan blockage condition when the condenser temperature difference is less than the high condenser temperature difference value and the discharge superheat temperature is less than a low discharge superheat temperature value. The method also includes checking for an undercharge condition or an evaporator fan blockage condition when the condenser temperature difference is less than the high condenser temperature difference value and the discharge superheat temperature is greater than a high discharge superheat temperature value. The method also includes completing installation of the compressor when the condenser temperature difference is between the high condenser temperature difference value and the low condenser temperature difference value and the discharge superheat is between the high discharge superheat temperature value and the low discharge superheat temperature value.

A method is provided that includes installing a compressor in a refrigeration system and determining a condenser temperature difference using processing circuitry. The method also includes checking for an overcharge condition or a condenser fan blockage condition when the condenser temperature difference is greater than a high condenser temperature difference value. The method also includes determining a discharge superheat temperature using the processing circuitry and checking for the overcharge condition or the condenser fan blockage condition when the condenser temperature difference is less than the high condenser temperature difference value and the discharge superheat temperature is less than a low discharge superheat temperature value. The method also includes checking for an undercharge condition or an evaporator fan blockage condition when the condenser temperature difference is less than the high condenser temperature difference value and the discharge superheat temperature is greater than a high discharge superheat temperature value. The method also includes completing installation of the compressor when the condenser temperature difference is between the high condenser temperature difference value and the low condenser temperature difference value and the discharge superheat is between the high discharge superheat temperature value and the low discharge superheat temperature value.

A motor vehicle-mounted system for controlling an air compressor or hydraulic fluid pump is provided. The system can alternatively include a battery box or an engine-driven welder configured for supplying DC power to an electric motor via an electric motor controller. The electric motor can operate an air compressor, which can further include an air tank for storing compressed air. The electric motor can also operate a hydraulic fluid pump for operating a pressurized hydraulic fluid system.

A motor vehicle-mounted system for controlling an air compressor or hydraulic fluid pump is provided. The system can alternatively include a battery box or an engine-driven welder configured for supplying DC power to an electric motor via an electric motor controller. The electric motor can operate an air compressor, which can further include an air tank for storing compressed air. The electric motor can also operate a hydraulic fluid pump for operating a pressurized hydraulic fluid system.