J&e Hall Limited

Aaf-mcquay Inc.

Daikin Industries, Ltd.

Terence William Thomas Young

John Michael Roll

Peter Michael Woodard

Maghmood Van Der Poll

Andrew Albert Ellingham

A single screw compressor comprises a main rotor and at least one gate rotor, a casing for the main rotor having a discharge port at a discharge end of the casing, and a slide slidable within a bore in the casing adjacent the main rotor. The slide has a cut-out () between first () and second () sealing parts of the slide, the slide is slidable between a high volume ratio position where the cut-out () is within the casing and provides a path to the discharge port, and a low volume ratio position where the slide is beyond the discharge end of the casing to provide a fixed discharge path in the bore of the casing.

Slide valve of a single screw compressor

A ducted separator in a compressor-based cooling assembly is connected to an oil/gas outlet of the compressor. The ducted separator is a pipe with at least one bend in it which collects oil in a manner which can achieve 98% oil carry over efficiency. The ducted separator may optionally be connected to a second phase separator such as a centrifugal cylinder. In that case, the height of the centrifugal cylinder can be significantly reduced compared with conventional arrangements. Alternatively, a simpler impingement surface such as one or more baffles may be used as the second phase separator or just a collection chamber.

External separator

Disclosed is a discharge muffler for a compressor constructed as an inner duct extending inside an outer duct, the inner duct being open at each end and the outer duct being open only at the muffler inlet. The inner duct has a plurality of holes communicating with the outer duct. At least two of the holes are at different distances from the muffler outlet.

Discharge muffler

A slide for use in a single screw compressor is disclosed. The screw compressor is arranged to vent the flutes of its main rotor at all times, without having to provide a check valve in the discharge port of the main rotor casing. An additional outlet port in the casing vents gas from the discharge ends of the flutes into the body of the slide instead of to the discharge port. The vented gas is guided to an exit port of the slide, from where it can reach either the discharge port or the bypass port of the casing at all times during use of the compressor and under all loading conditions. The design of the disclosed slide further allows the use of an offset discharge port in the casing, in relation to the main rotor.

Slide for use in a screw compressor

A valve comprises a housing () having an inlet () and an outlet (), and a pressure sensing port (). A piston () slides in a part () of the housing () in response to a difference between a first fluid pressure at the pressure sensing port on the one side of the piston, and a second fluid pressure at the inlet and/or outlet on the other side of the piston (). A valve member () carried by the piston is operable thereby to close the inlet () when said second fluid pressure is less than a value sufficiently greater than said first fluid pressure. The valve member () is movable with respect to the piston () to facilitate closing of the inlet (), in response to a fluid flow from the housing () to the inlet (), when the piston is not acting to close the inlet.

Valve

In a method of repairing a scroll compressor, the casingof the compressor is cut open by making two transverse cuts through the casing to give access to the internal components of the compressor. The casingis then resealed, using two annular reinforcing structures, one at each cut, to conserve the dimensions of the casing. This allows a scroll compressor to be repaired and re-assembled without losing the fine positioning of internal components which are held in place by the casing. Each annular reinforcing structurecomprises a ringwith an outwardly directed flange. The flangehas a thickness chosen to conserve the dimensions of the re-assembled casing while allowing single-pass welding and the ringhas a length which is chosen to provide at least location of the cut surfaces of the casingduring re-assembly and, optionally, shielding to prevent weld pool, slag or splatter entering the canister

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Gravesend, United Kingdom

Terence William Thomas Young