Patent ID: 8196420

Claim:
A cooling or heating system for controlling the liquid flow to reduce power losses, said cooling or heating system comprising: at least one compressor; a condenser in communication with said compressor; an expansion apparatus in communication with said condenser by a condensate channel; a vaporizer in communication with said expansion apparatus and said compressor; a control apparatus in said condenser or in proximity to an outlet of said condenser before said expansion apparatus, said control apparatus being arranged to receive liquid from said condenser, said control apparatus having an inlet to an impulse-signal channel, said impulse-signal channel having at least one vaporize arrangement to vaporize liquid that comes into said impulse-signal channel, said vaporize arrangement provides at least a heat-exchange between said condensate channel and said impulse-signal channel; an orifice arranged in said impulse-signal channel and after said vaporize arrangement, said impulse-signal channel being connected to a cooling or heating system low-pressure side, said orifice reduces an impulse-signal flow entering said low-pressure side for maintaining a higher pressure in said impulse-signal channel from a high pressure side relative to said low pressure side by depending on pressure produced by an amount of said liquid that is vaporized in said impulse-signal channel and said impulse-signal flow from said impulse-signal channel to said low pressure side; and a control for controlling an opening and closing process of said expansion apparatus, said control being connected to said impulse-signal channel; wherein the amount of liquid that vaporizes in said impulse-signal channel affects the pressure in said impulse-signal channel, and wherein the pressure in said impulse-signal channel affects said control for controlling said opening and closing process of said expansion apparatus.