Control system and method for reciprocating compressors
AssigneeEmbraco Industria de Compressores e Solucoes em Refrigeracao Ltda.
InventorsMarcos Guilherme Schwarz, Filipe Guolo Nazario
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Abstract
A control system for hermetic cooling compressor includes a reciprocating compressor (3) and an electronic control (2) for the reciprocating compressor (3). The electronic control (2) is configured for, after commanding the turning off of the reciprocating compressor (3), detecting whether the turn velocity (23) of the turning axle (10) is below a predefined velocity level, and then applying a braking torque (36) that causes deceleration of the turning axle (10) before completing the next turn of the turning axle (10), in case the turn velocity (23) detected is below the velocity level (34).
Claims16
A cooling compressor control system comprising:
- an electronic control (2);
- and
- a reciprocating compressor (3) comprising a mechanical assembly (12) including a compression mechanism (8), said compression mechanism comprising a reciprocating piston (15) coupled to a turning axle (10), and said mechanical assembly (12) further comprising a motor (9) that rotates the turning axle (10) to reciprocate the piston (15);
- wherein
- the electronic control (2) is configured to detect a rotation turn velocity (33) of the compression mechanism (8) during a stopping process of the reciprocating compressor (3) and to apply a braking torque (36) to the mechanical assembly (12) after detecting that the rotation turn velocity (33) is below a predefined velocity level (34);
- and
- wherein the electronic control is adapted to determine whether the rotation turn velocity is below the predefined velocity level by detecting a period that the compression mechanism needs to carry out a movement and to compare the period with a maximum reference time, the maximum reference time being related with the period which the compression mechanism needs to carry out the movement at the predefined velocity level.
A control method for a hermetic cooling reciprocating compressor (2), comprising the steps of:
- (a) detecting a rotation turn velocity (33) of a mechanical assembly (12) that comprises a compression mechanism (8) and a motor (9) during a stopping process of the reciprocating compressor (3), said compression mechanism comprising a reciprocating piston (15) coupled to a turning axle (10), said turning axle (10) driven by said motor (9);
- (b) comparing the rotation turn velocity (33) with a predefined velocity level (34);
- and
- (c) applying a braking torque (36) for a deceleration of the mechanical assembly (12) after detecting that the rotation turn velocity (33) is below the predefined velocity level (34);
- wherein the step (a) detects a period which the compression mechanism (8) needs to carry out a movement and the step (b) compares the period with a maximum reference time related with the period which the compression mechanism (8) needs to carry out the movement at the predefined velocity level (34) to determine the rotation turn velocity (33).
Dependencies are inferred from the claim text.