Scroll compressor and air conditioner
AssigneeDaikin Industries, Ltd.
InventorsYoshitaka Shibamoto, Kenji Matsuba, Keiji Yoshimura
Life of this patent
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Abstract
A scroll compressor comprises an operating state detection part (27) detecting an operating state, a variable-speed motor (28), a control part (26) and an unloading mechanism (12) serving as capacity control means. The control part (26) controls operation of the unloading mechanism (12) and the rotational frequency of the motor (28) in response to the operating state detected by the operating state detection part (27). An air conditioner comprises the aforementioned scroll compressor, a condenser (23), an expansion valve (24) and an evaporator (25).
Claims10
A scroll compressor having a movable scroll and a fixed scroll forming a compression chamber compressing a refrigerant, said scroll compressor comprising:
- a variable-speed motor driving said movable scroll;
- capacity control means controlling the capacity of said scroll compressor by supplying said refrigerant into said compression chamber or bypassing said refrigerant from said compression chamber to a low-pressure side;
- an operating state detection part detecting the operating state of said scroll compressor;
- and
- a control part controlling operation of said capacity control means and the rotational frequency of said motor;
- wherein said operating state detection part includes an operating pressure ratio detection part detecting an operating pressure ratio indicating the value of the ratio of a suction pressure for said refrigerant to a discharge pressure for said refrigerant and a required ability detection part detecting required ability in operation of said scroll compressor, and
- wherein said control part controls operation of said capacity control means and the rotational frequency of said motor in response to said operating pressure ratio and said required ability.
An air conditioner including a compressor having a compression element compressing a refrigerant and a plurality of loading-side heat exchangers condensing or evaporating said refrigerant, said air conditioner comprising:
- a variable-speed motor driving said compression element;
- capacity control means supplying said refrigerant to said compression element or extracting said refrigerant from said compression element thereby controlling the capacity of said compressor;
- an operating state detection part detecting the operating state of said air conditioner;
- and
- a control part controlling operation of said capacity control means and the rotational frequency of said motor;
- wherein said operating state detection part includes an operating pressure ratio detection part detecting an operating pressure ratio indicating the value of the ratio of a suction pressure for said refrigerant to a discharge pressure for said refrigerant in said compressor and a required ability detection part detecting required ability of said loading-side heat exchangers in operation of said air conditioner, and
- wherein said control part controls operation of said capacity control means and the rotational frequency of said motor in response to said operating pressure ratio and said required ability.
Dependencies are inferred from the claim text.