Fisher & Paykel Appliances Limited

Upesh Patel

John H Boyd, Jr

Timothy Gordon Read

Ian Campbell McGill

Gerald David Duncan

Neville David Seagar

Geoffrey Alan Lee

Andrew Paul Taylor

Gordon Cameron Otte

David Julian White

Craig Bruce

Ian Mcgill

David White

Brian Bonniface

Gordon Mallinson

Gordon Otte

John Boyd

A linear compressor comprising a cylinder part including a cylinder bore. A piston disposed in, and is slidable within, the bore. A main spring connects the cylinder part directly or indirectly to the piston. A connecting rod connects between the main spring and the piston. A stator has an air gap, and the connecting rod passes through the air gap. At least one armature pole is located along the connecting rod.

Linear compressor

A linear compressor has a hollow piston with crown and sidewall. The piston reciprocates in a cylinder. A piston rod connects the piston to a spring. A connection between the piston rod and the piston transmits axial forces directly to the piston crown. The connection transmits lateral forces to the piston at an axial location away from the piston crown. The connection allows rotational flexibility between the piston and the piston rod transverse to and uniformly around the piston reciprocation axis. Other improvements in or relating to linear compressors are disclosed and claimed.

Connecting rod for a linear compressor

Compressor improvements

A linear compressor includes a cylinder part with a cylinder bore. A piston is disposed in the bore and slidable therein. A main spring connects the cylinder part to the piston. A connecting member connects between the main spring and the piston. The connecting member passes through the air gap of a stator of a linear electric motor. At least one armature pole of the motor is located along the connecting member. The stator comprises a plurality stator parts opposed across the air gap. The cylinder part includes a tapered clamp for each stator part. The tapered clamp widens outward from the air gap. Each stator part has a matching taper and is engaged in the tapered clamp.

A linear compressor has a hollow piston with crown and sidewall. The piston reciprocates in a cylinder. A piston rod connects the piston to a spring. A connection between the piston rod and the piston transmits axial forces directly to the piston crown. The connection transmits lateral forces to the piston at an axial location away from the piston crown. The connection allows rotational flexibility between the piston and the piston rod transverse to and uniformly around the piston reciprocation axis. Other improvements in or relating to linear compressors are disclosed.

A method of manufacturing a linear compressor includes measures to account for possible variations in manufacture of the spring connecting between a cylinder part and a piston part. In the method, the piston is located at a predetermined axial position in the bore of the cylinder of the compressor. A spring that is connected with the cylinder part is extended so that a piston connection point of the spring is at a position based on a predetermined displacement of the spring or a position in which the spring exerts a predetermined reaction force. In this position, this piston and the spring connection point are thus separated by a distance that depends on the actual formed dimension of the individual spring. The piston and the piston connection point are subsequently joined to have a rigid axial separation that is fixed according to the separation attained in these steps.

Method of manufacturing a linear compressor

Refrigeration compressor

Growing community of inventors

Auckland, New Zealand

Upesh Patel