| 摘要 |
The present invention relates to a linear-compressor control system, to the respective control method, and to the linear compressor itself incorporated into the control system of the present invention. According to the teachings of the prior art, the control of the capacity of a conventional compressor presents problems, due to characteristics intrinsic in this type of equipment. As it is known, one cannot start a compressor without the pressures of the cooling system being equalized. One of the functions of a conventional variable-capacity compressor is exactly to prevent the pressures of the system from becoming unequalized, in order to prevent the need to stop the equipment and wait for the pressures of the cooling fluid to become equalized. In order to overcome the problems of the prior art, one foresees a linear-compressor control system comprising an electronic circuit (50) controlling the linear compressor (10) through an electric motor (7), the linear compressor (10) comprising a cylinder (4) and a piston (5); the piston (5) being arranged inside a cylinder (4) and being driven by the electric motor (7) and moving axially within the cylinder (4) throughout the piston stroke between a top dead end (TDE) and a bottom dead end (BDE), a compression chamber (C) being arranged close to the top dead end (TDE) and the piston (5) compressing a fluid within the compression chamber (C), the electronic circuit (50) controlling the electric motor (7) intermittently through an on-time (tL) and an off-time (tD), throughout the operation of the linear compressor (10), the electronic circuit (5) actuates the electric motor (7) and keeps the piston stroke constant, generating a constant compression capacity, while the electronic circuit (50) controls the electric motor (7) for operation during the on-time (XC), the system being configured so that the electronic circuit (50) controls the on-time (tS_) and the off-time (to) to keep the compression capacity substantially constant throughout the time of operation of the linear compressor (10). |
