Ventil sestává z ventilového tělesa (10) s vnitřní dutinou (24), uspořádanou mezi výstupním otvorem (15) ventilu a vstupním otvorem (28) ventilu a opatřenou přestavitelnou jednotkou pro otevírání a uzavírání vstupního otvoru (28) ventilu, který je pro umožnění rychlého nárůstu tlaku kapalného chladiva ve vnitřní dutině (24) po otevření vstupního otvoru (28) ventilu a pro jeho bezprostřední rychlé uzavření větší než výstupní otvor (15) ventilu. Chladicí zařízení obsahuje ventilový prvek, napojený na své výstupní straně na výparník (30), jehož výstupní konec je přes kondenzátor pro kondenzování plynného chladiva na kapalné připojen na vstupní stranu ventilového prvku, přičemž ventilový prvek je tvořen termostatickým expanzním ventilem, jehož otvor (11) je prostřednictvím tlakového vedení (31) propojen s teploměrnou jímkou (32), uspořádanou na výparníku (30) a upravenou pro vytváření ovládacího tlaku, uměrného teplotě par chladiva ve výparníku (30).ŕ
Output: In the present invention, there is disclosed a valve assembly for pulsed operation between open and closed conditions comprising: one inlet port (28) for being open and closed during operation having an inlet flow area and a valve for opening and closing said inlet port (28), an open outlet port (15) having an outlet flow area, a valve cavity (24) between said inlet port (28) and said outlet port (15) and in open communication therewith, said valve being responsive to pressure within said valve cavity (24) for opening and closing said inlet port (28), and wherein higher pressure therein biases said valve to close said inlet port (28) and lower pressure therein biases said valve to open said inlet port (28), said inlet flow area being larger than said outlet flow area whereby opening said inlet port provides for rapid pressure buildup in said cavity and rapid closure thereof after each opening, whereby said valve is pulsed to rapidly open and close said inlet port (28) during said operation. Disclosed is also a refrigeration apparatus comprising a condenser for condensing refrigerant gas, an evaporator (30) for cooling a load in thermal exposure therewith, and a valve assembly for pulsed operation between open and closed conditions for controlling refrigerant flow comprising: an inlet port in communication with said condenser having an inlet flow area for receiving condensed refrigerant, and a valve for opening and closing said inlet port, an open outlet port having an outlet flow area and communicating with said evaporator for directing liquid refrigerant thereto, a valve cavity between said inlet port and said outlet port and in open communication therewith, said valve being responsive to pressure within said valve cavity for opening and closing said inlet port, and wherein higher pressure therein biases said valve to close said inlet port and lower pressure therein biases valve to open said inlet port, said inlet flow area being at least twice the size of said outlet flow area whereby opening said inlet port provides for rapid pressure buildup in said cavity and rapid closure thereof after each opening, whereby said valve is pulsed to rapidly open and close said inlet port during said operation.