Refrigerating machine
AssigneePanasonic Corporation
InventorsYuuichi Yakumaru, Tetsuya Saito, Tomoichiro Tamura, Masaya Honma
Life of this patent
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Abstract
A compressor, a radiator, an expander, and an evaporator are connected in series to define a refrigerating cycle. A bypass circuit that bypasses the expander, an on-off valve disposed in the bypass circuit, and a controller C1 for controlling an opening of the on-off valve are provided in the refrigerating cycle. During defrosting, the controller C1 controls the on-off valve so that a refrigerant may flow through the bypass circuit, thereby avoiding reduction in the amount of flow of the refrigerant during defrosting and preventing the defrosting operation from being prolonged.
Claims9
A refrigerating machine comprising;
- a compressor, a first heat-exchanger, an expander, and a second heat-exchanger, all connected in series to define a refrigerating cycle;
- a generator connected to the expander;
- a bypass circuit that bypasses the expander;
- a refrigerant regulator disposed in the bypass circuit;
- and
- a controller operable to control an opening of the refrigerant regulator;
- wherein during defrosting, the controller controls the refrigerant regulator to open it to thereby flow a refrigerant through the bypass circuit, and also controls a speed of the expander to a predetermined value with the generator used as a motor to thereby increase an amount of refrigerant in the refrigerating cycle.
Dependencies are inferred from the claim text.