Refrigerant compressor driven by variable supply frequency motor
AssigneeZanussi Elettromeccanica S.p.A.
InventorsTiziano Bertotti, Fabrizio Carli, Roberto Peruzzo
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Abstract
A refrigerant compressor driven by an electric motor, whose supply frequency is selectively variable between a discrete number of values (f1, f2, fT) as a function of an input signal, uses control means integrated in the compressor to monitor two or more quantities that are variable with time in a mutually independent manner, of which at least one is representative of the actual operating conditions of the appliance. The control means also generates the input signal with a value that corresponds to a pre-established combination of the monitored quantities.
Claims4
A compressor of refrigerant medium for a home-type or similar refrigeration apparatus, driven by a motor (10) whose power supply frequency is selectively variable between a discrete number of values (f1, f2, fT) as a function of an input signal, characterized in that it integrally comprises control means (7) which are adapted to monitor two or more quantities that are variable with time in a mutually independent manner, of which at least one is representative of the actual operating conditions of the appliance, said control means being further adapted to generate said input signal with a value that corresponds to a preestablished combination of the monitored quantities,
- wherein the compressor also integrally comprises means for processing said input signal, which are from time to time adapted to privilege any of said time-variable quantities over the other ones as a function of the absolute value that such quantities take in a respective pre-set scale, and
- wherein one of said variable quantities is constituted by the utilization index of the driving motor (10) thereof.
A compressor of refrigerant medium for a home-type or similar refrigeration apparatus, driven by a motor (10) whose power supply frequency is selectively variable between a discrete number of values (f1, f2, fT) as a function of an input signal, characterized in that it integrally comprises control means (7) which are adapted to monitor two or more quantities that are variable with time in a mutually independent manner, of which at least one is representative of the actual operating conditions of the appliance, said control means being further adapted to generate said input signal with a value that corresponds to a pre-established combination of the monitored quantities.
- wherein the compressor also integrally comprises means for processing said input signal, which are from time to time adapted to privilege any of said time-variable quantities over the other ones as a function of the absolute value that such quantities take in a respective pre-set scale, and
- wherein one of said variable quantities is constituted by the absolute duration of the operation of the driving motor (10) thereof.
A compressor of refrigerant medium for a home-type or similar refrigeration apparatus, driven by a motor (10) whose power supply frequency is selectively variable between a discrete number of values (f1, f2, fT) as a function of an input signal, characterized in that it integrally comprises control means (7) which are adapted to monitor two or more quantities that are variable with time in a mutually independent manner, of which at least one is representative of the actual operating conditions of the appliance, said control means being further adapted to generate said input signal with a value that corresponds to a pre-established combination of the monitored quantities,
- wherein the compressor also integrally comprises means for processing said input signal, which are from time to time adapted to privilege any of said time-variable quantities over the other ones as a function of the absolute value that such quantities take in a respective pre-set scale, and
- wherein one of said variable quantities is constituted by the electric current input of the driving motor (10) thereof.
A compressor of refrigerant medium for a home-type or similar refrigeration apparatus, driven by a motor (10) whose power supply frequency is selectively variable between a discrete number of values (f1, f2, fT) as a function of an input signal, characterized in that it integrally comprises control means (7) which are adapted to monitor two or more quantities that are variable with time in a mutually independent manner, of which at least one is representative of the actual operating conditions of the appliance, said control means being further adapted to generate said input signal with a value that corresponds to a pre-established combination of the monitored quantities.
- wherein the compressor also integrally comprises means for processing said input signal, which are from time to time adapted to privilege any of said time-variable quantities over the other ones as a function of the absolute value that such quantities take in a respective pre-set scale, and
- wherein the ratio of the highest power-supply frequency (fT) to the lowest power-supply frequency (f1) of the driving motor (10) thereof is comprised between 1.4 and 2.1 and is preferably anywhere near 2.
Dependencies are inferred from the claim text.