Abstract: Various embodiments of the teachings herein include a valve comprising: a first port; a second port; a fluid path extending between the first port and the second port; a valve member situated in the fluid path, the valve member selectively moveable between a closed position, blocking the fluid path, and an open position; an armature coupled to the valve member and having a surface; and a solenoid forming a linear actuator with the armature. At least a portion of the surface of the armature directly faces the solenoid.

Abstract: Various embodiments of the teachings herein include a valve comprising: a first port; a second port; a fluid path extending between the first port and the second port; a valve member situated in the fluid path, the valve member selectively moveable between a closed position, blocking the fluid path, and an open position; an armature coupled to the valve member and having a surface; and a solenoid forming a linear actuator with the armature. At least a portion of the surface of the armature directly faces the solenoid.

Abstract: A system supplies a fluid to an evaporator of a refrigeration unit and has first and second lines connected to a fluid inlet of the evaporator. The system has an expansion valve with a continuously modifiable first flow cross section, disposed in the first line, the continuously modifiable first flow cross section setting a first mass flow through the first line. A shut-off device is disposed in the second line and switchable discretely between an open position and a closed position. A throttle with a constant second flow cross section is disposed in the second line. A control unit continuously modifies the first flow cross section of the expansion valve and controls the shut-off device as a function of the first flow cross section.