Abstract: A thermal management system includes a first flow direction switching device, a first throttling device, a first heat exchanger, a second heat exchanger and a third heat exchanger. The first flow direction switching device includes a first port, a second port and a third port. In a first working state, the first port communicates with at least one of the second port and the third port. In a heating mode, the first flow direction switching device is in the first working state; the first port communicates with a first end port of the first throttling device; a second end port of the first throttling device communicates with an outlet of the first heat exchanger. Both the second heat exchanger and the third heat exchanger can realize throttling function through the first throttling device, so as to simplify the thermal management system. A control method thereof is also disclosed.

Abstract: A cold-launch device, including a high-energy gas resource, a gas cylinder, a control valve, a gas-liquid mixing cylinder having a cylinder body, the high-energy gas resource is connected to the gas cylinder whereby supplying energy thereto, and the gas cylinder is connected to an terminal of the gas-liquid mixing cylinder via the control valve and a connecting pipe.

Abstract: A cold-launch device, including a high-energy gas resource, a gas cylinder, a control valve, a gas-liquid mixing cylinder having a cylinder body, the high-energy gas resource is connected to the gas cylinder whereby supplying energy thereto, and the gas cylinder is connected to an terminal of the gas-liquid mixing cylinder via the control valve and a connecting pipe.

Abstract: A continuously auto lifting and lowering hydraulic jack comprises a base, an oil pump, working oil cylinder, a piston, an oil box, an accumulator, a two-position and two-way valve, a dual-controlling check, a pressure-set check and other checks. The two-position and two-way valve, the dual-controlling check and the pressure-set check are arranged in a straight line; a valve bore is formed in the base to serve as a common valve bore for the two-position and two-way valve, the dual-controlling check and the pressure-set check. Valve members of the two-position and two-way valve, the dual-controlling check and the pressure-set check are disposed sequentially in the valve bore in series; a tappet is positioned between the two-position and two-way valve and the dual-controlling check; and another tappet is positioned between the dual-controlling check and the pressure-set check. Also disclosed is a hydraulic circuit for the hydraulic jack.

Abstract: A continuously auto lifting and lowering hydraulic jack comprises a base, an oil pump, working oil cylinder, a piston, an oil box, an accumulator, a two-position and two-way valve, a dual-controlling check, a pressure-set check and other checks. The two-position and two-way valve, the dual-controlling check and the pressure-set check are arranged in a straight line; a valve bore is formed in the base to serve as a common valve bore for the two-position and two-way valve, the dual-controlling check and the pressure-set check. Valve members of the two-position and two-way valve, the dual-controlling check and the pressure-set check are disposed sequentially in the valve bore in series; a tappet is positioned between the two-position and two-way valve and the dual-controlling check; and another tappet is positioned between the dual-controlling check and the pressure-set check. Also disclosed is a hydraulic circuit for the hydraulic jack.

Abstract: A control unit for hand-operated hydraulic jack comprises a control handle (1), a small hand-operated pump (2), a lifting cylinder (4), an inlet pipe and an outlet pipe, wherein the inlet pipe of said lifting cylinder (4) is connected with the small hand-operated pump (2) having a back-moving spring through a lifting oil circuit having a non-return valve (3), which the small hand-operated pump (2) is controlled by the control handle (1); said lifting oil circuit with a non-return valve (3) has an underload-accelerating oil circuit for quickly lifting the load when underloaded; and a release valve is provided on the outlet pipe of said lifting cylinder (4). This unit has the function of quickly lifting the load when underloaded, as well as increasing the force for lifting load when have loaded, and it can be operated simply and reliably.