Whirlpool S.a.

Marcelo Knies

Dietmar Erich Bernhard Lilie

Paulo Sergio Dainez

Rinaldo Puff

Nerian Fernando Ferreira

Clodovir Gallo

Henrique Brüggmann MÜHLE

Nerian Fernando Ferrelra

A piston and cylinder combination driven by linear motor with cylinder position recognition system, including a support structure forming an air gap; a motor winding generating a variable magnetic flow along part of the air gap; a cylinder having a head at one end; a piston connected to a magnet, the magnet driven by the magnetic flow of the motor winding to move inside a displacement path including at least partially the air gap; the displacement of the magnet making the piston reciprocatingly move inside the cylinder; and an inductive sensor disposed at a point of the displacement path of the magnet, such that when the piston reaches a position of closest approach to the cylinder head, the inductive sensor detects a variation in the magnetic field resulting from the corresponding position of the magnet, and generates a voltage signal arising from this magnetic field variation.

Piston and cylinder combination driven by linear motor with cylinder position recognition system and linear motor compressor, and an inductive sensor

A method of detecting impact or collision between a cylinder () and piston () driven by a linear motor of a gas compressor includes the steps of: i) obtainment of a reference signal (Sr) associated to an electrical output of the linear motor before the piston attains the upper dead center; ii) obtainment of a detection signal (Sd) associated to the electrical output of the linear motor after the piston attains the upper dead center; iii) comparison between the reference signal (Sr) and the detection signal (Sd); and iv) record of occurrence of impact when the result of comparison of step iii indicates that the detection signal (Sd) presents a variation deriving from impact between the cylinder and the piston, considering a pre-established tolerance. Also disclosed is an electronic detector device , a gas compressor () and a control system.

Method of detecting impact between cylinder and piston driven by a linear motor, detector of impact between a cylinder and piston driven by a linear motor, gas compressor, control system for a cylinder and a piston set driven by a linear motor gas compressor, control system for a cylinder and a piston set driven by a linear motor

The present invention relates to a system and method of controlling a linear compressor (), which is capable of fine-tuning the compressor when necessary, throughout the operating period of the compressor, so that said compressor operates at maximum capacity, wherein the piston () achieves a maximum displacement amplitude, closely approaching the cylinder head () without colliding with it. The system and the method according to the invention are also intended to control the operation of the linear compressor throughout its operating period, also seeking to maximize its performance and to reduce or optimize its power consumption. According to the present invention, the fine-tuning and control of the operation of the linear compressor are carried out by means of the combination of a technique for controlling a compressor without a sensor, and a technique for controlling the compressor with the aid of a sensor.

System and method of controlling a linear compressor

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Marcelo Knies