JP2877412B

PURPOSE:To realize the control of a large capacity of refrigerant circulating amount inexpensively and control the flow amount of the refrigerant continuously by providing a bypass pipe with an opening and closing valve, bypassing an electronic expansion valve, in the part of the expansion valve of...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: SEKIGAMI KUNIMORI, SHIINA TAKAO
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:PURPOSE:To realize the control of a large capacity of refrigerant circulating amount inexpensively and control the flow amount of the refrigerant continuously by providing a bypass pipe with an opening and closing valve, bypassing an electronic expansion valve, in the part of the expansion valve of the electronic expansion valve. CONSTITUTION:An opening and closing valve (solenoid valve) 8 is provided in a bypass pipe provided in parallel to an electronic expansion valve 5 while the capacity of the opening and closing valve is the same as the capacity of said electronic expansion valve 5. The electronic expansion valve 5 and the opening and closing valve 8 are controlled by a controller 11 and when the circulating amount of refrigerant is smaller than the capacity of the electronic expansion valve 5, the opening and closing valve 8 is closed and the electronic expansion valve 5 is controlled. When the circulating amount of the refrigerant is so big that it exceeds the capacity of the electronic expansion valve 5, the opening and closing valve 8 is opened and the electronic expansion valve 5 is also controlled. The opening and closing valve 8 and the electronic expansion valve 1 are controlled by the controller 11 in such a manner whereby the circulating amount of refrigerant is controlled continuously from a small capacity to a big capacity. Further, the opening and closing valve 8 is very cheat compared with a case wherein the electronic control valve of a big capacity is employed and the same valve 8 can be used for controlling the circulating amount of refrigerant to a big capacity.