A reversible thermal management system and method for a work machine is disclosed. The system comprises a prime mover, a battery, a first circuit, and a second circuit. The battery supplies at least a portion of power of the prime mover. The first circuit circulates a glycol adapted to exchange thermal energy with one or more of an electronic component, a transmission circuit, a hydraulic circuit and the battery. The second circuit circulates a refrigerant. The second circuit, which is thermally coupled to the first circuit by at least one heat exchanger, is adapted to exchange thermal energy with air.

A reversible thermal management system and method for a work machine is disclosed. The system comprises a prime mover, a battery, a first circuit, and a second circuit. The battery supplies at least a portion of power of the prime mover. The first circuit circulates a glycol adapted to exchange thermal energy with one or more of an electronic component, a transmission circuit, a hydraulic circuit and the battery. The second circuit circulates a refrigerant. The second circuit, which is thermally coupled to the first circuit by at least one heat exchanger, is adapted to exchange thermal energy with air.

A refrigerant cycle system includes: a primary-side cycle of a vapor compression type that circulates a first refrigerant; a secondary-side cycle of a vapor compression type that circulates a second refrigerant; and a cascade heat exchanger that exchanges heat between the first refrigerant and the second refrigerant. The secondary-side cycle includes a secondary-side heat exchanger that uses cold or heat obtained by the second refrigerant from the cascade heat exchanger. The secondary-side heat exchanger includes a flat multi-hole pipe.

A refrigerant cycle system includes: a primary-side cycle of a vapor compression type that circulates a first refrigerant; a secondary-side cycle of a vapor compression type that circulates a second refrigerant; and a cascade heat exchanger that exchanges heat between the first refrigerant and the second refrigerant. The secondary-side cycle includes a secondary-side heat exchanger that uses cold or heat obtained by the second refrigerant from the cascade heat exchanger. The secondary-side heat exchanger includes a flat multi-hole pipe.

A refrigerant cycle system includes a primary-side cycle that circulates a first refrigerant, a secondary-side cycle that circulates a second refrigerant, and a cascade heat exchanger that exchanges heat between the first refrigerant and the second refrigerant. The primary-side cycle includes a primary-side connection pipe. The secondary-side cycle includes a secondary-side connection pipe. The primary-side connection pipe includes a primary-side gas connection pipe and a primary-side liquid connection pipe. The secondary-side connection pipe includes a secondary-side gas connection pipe and a secondary-side liquid connection pipe. The pipe diameter of the secondary-side gas connection pipe is smaller than the pipe diameter of the primary-side gas connection pipe, or the pipe diameter of the secondary-side liquid connection pipe is smaller than the pipe diameter of the primary-side liquid connection pipe.

The reversed single-working-medium vapor combined cycle of the present invitation belongs to the field of thermodynamics, refrigeration and heat pump. A reversed single-working-medium vapor combined cycle method consists of seven processes which are conducted with M.sub.1 kg of working medium and M.sub.2 kg of working medium separately or jointly: a heat-absorption vaporization process 1-2 of the M.sub.1 kg of working medium, a heat-absorption process 2-3 of the (M.sub.1+M.sub.2) kg of working medium, a pressurization process 3-4 of the (M.sub.1+M.sub.2) kg of working medium, a heat-releasing process 4-5 of the (M.sub.1+M.sub.2) kg of working medium, a depressurization process 5-2 of the M.sub.2 kg of working medium, a heat-releasing and condensation process 5-6 of the M.sub.1 kg of working medium, a depressurization process 6-1 of the M.sub.1 kg of working medium.

The reversed single-working-medium vapor combined cycle of the present invitation belongs to the field of thermodynamics, refrigeration and heat pump. A reversed single-working-medium vapor combined cycle method consists of seven processes which are conducted with M.sub.1 kg of working medium and M.sub.2 kg of working medium separately or jointly: a heat-absorption vaporization process 1-2 of the M.sub.1 kg of working medium, a heat-absorption process 2-3 of the (M.sub.1+M.sub.2) kg of working medium, a pressurization process 3-4 of the (M.sub.1+M.sub.2) kg of working medium, a heat-releasing process 4-5 of the (M.sub.1+M.sub.2) kg of working medium, a depressurization process 5-2 of the M.sub.2 kg of working medium, a heat-releasing and condensation process 5-6 of the M.sub.1 kg of working medium, a depressurization process 6-1 of the M.sub.1 kg of working medium.

A vector control system is used to control a vapor compression circuit. The vector control system may monitor the vapor compression circuit and adjust the speed of one or more motors to increase efficiency of the system by taking into account the torque forces placed on a compressor motor.

A vector control system is used to control a vapor compression circuit. The vector control system may monitor the vapor compression circuit and adjust the speed of one or more motors to increase efficiency of the system by taking into account the torque forces placed on a compressor motor.

A compressor system for a cryocooler includes a compressor unit that includes a compressor main body compressing a refrigerant gas of the cryocooler and a liquid-cooled heat exchanger cooling, through heat exchange with a cooling liquid, at least one of the refrigerant gas compressed by the compressor main body and an oil lubricating the compressor main body, a supply line through which the cooling liquid is supplied from a main chiller to the liquid-cooled heat exchanger, a collecting line through which the cooling liquid is collected from the liquid-cooled heat exchanger to the main chiller, and a backup chiller that is provided outside the compressor unit, circulates the cooling liquid to the liquid-cooled heat exchanger in place of or together with the main chiller, and includes a circulation pump and a cooler cooling the cooling liquid on an inlet side or outlet side of the pump.