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Linear compressor cylinder and head constructionLinear compressor cylinder and head construction description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20080075610, Linear compressor cylinder and head construction. Brief Patent Description - Full Patent Description - Patent Application Claims
FIELD OF THE INVENTION [0001]The present invention relates to linear compressors, and in particular linear compressors of the type suitable for use in a vapour compression refrigeration system. BACKGROUND TO THE INVENTION [0002]Linear compressors of a type for use in a vapour compression refrigeration system are the subject of many documents in the prior art. One such document is our co-pending PCT patent application PCT/NZ2004/000108. That specification describes a variety of developments relating to compressors, many of which have particular application to linear compressors. The present invention relates to further improvements to compressor embodiments such as those described in that patent application. Accordingly that application provides a general exemplification of a compressor to which the present invention may be applied. However the present invention may also be applied beyond the scope of the particular embodiments of a linear compressor disclosed in that application. Persons skilled in the art will appreciate the general application of the ideas herein to other embodiments of linear compressors such as are found in the prior art. [0003]The present invention relates generally to cylinder part and head assemblies. SUMMARY OF THE INVENTION [0004]It is an object of the present invention to provide a cylinder and cylinder head assembly with improved characteristics with particular application to linear compressors, or to at least provide the industry with a useful choice. [0005]In a first aspect the invention may broadly be said to consist in a cylinder and cylinder head assembly for a linear compressor comprising: [0006]a cylinder chassis including an inner surface defining a cylinder head space at one end and a cylinder space extending along an axis from said cylinder head space, said cylinder space being at least substantially cylindrical, with an outlet from said cylinder head space through the wall of said cylinder chassis, [0007]a cylindrical cylinder liner, open at both ends and located within said frame, such that the outer surface of said liner is engaged against the cylinder space defining portion of said inner surface of said chassis, and [0008]a valve plate defining a barrier between a compression end of said cylinder liner and said head space, said valve plate engaged between said cylinder chassis and said cylinder liner to locate said valve plate against the open end of said cylinder liner. [0009]According to a further aspect of the invention said cylinder chassis extends beyond the other end of said cylinder liner, and may carry, for example, stator parts of a linear motor. Alternatively said cylinder chassis may end intermediate the ends of said cylinder liner, to cover only a portion of the outer surface of the cylinder liner. In that case a separate cylinder part frame may be fixed over the other end of the cylinder liner, for example with an interference friction fit. The cylinder part frame may carry the stator parts of a linear motor. [0010]According to a further aspect of the invention the valve plate is not fixed to the cylinder liner, but alternatively it may be, for example by solder or brazing, or by adhesive. [0011]According to a further aspect of the invention said cylinder liner is an interference fit within said chassis and is held in place by friction. [0012]According to a further aspect of the invention said chassis includes, at a transition between said cylinder defining part of said inner surface and said head defining part of said inner surface, a shoulder or shoulders, and said valve plate is pressed between said shoulder or shoulders at one side and the annular end of said cylinder liner at its other side. [0013]The shoulder may be annular or may be an annular series of inwardly protruding shoulders. The shoulder may press directly against the face of the valve plate, or may press against the face of a valve plate via an intermediate component, such as a resilient spring or gasket. A gasket may be interposed between the annular end of the cylinder liner and the valve plate. [0014]The valve plate may include one or more valve members assembled to it. [0015]One or more grooves in either the inner surface of the cylinder chassis or the outer surface of the cylinder liner may define supply passages to supply compressed gases to gas bearing ports formed in the cylinder liner. Preferably these grooves are provided in the outer surface of the cylinder liner, for example as described in our PCT Application WO 02/35093. In that case one or more notches are preferably provided in the periphery of the valve plate to define a flow path between the compressed gases discharge space and the head and the gas bearing supply passages defined between the chassis and the liner. [0016]In a further aspect the present invention may broadly be said to consist in a refrigeration system compressor comprising a hermetic housing, a linear compressor within said hermetic housing, said compressor including a cylinder part assembly at least in part defined according to one or more of the above paragraphs, a piston part including a piston for reciprocating within the cylinder defined by said cylinder liner, and a linear electric motor for driving reciprocating movement between the piston part and cylinder part, with the linear compressor suspended for operation within said hermetic housing. [0017]In a still further aspect the present invention may broadly be said to consist in a method of manufacturing a linear compressor, including, for assembling the cylinder and head portion thereof, the steps of: [0018]by differential temperature, expanding a cylinder chassis relative to a cylinder liner part, [0019]inserting a valve plate defining barrier into said cylinder chassis through an open end thereof, [0020]inserting said cylinder liner part into said cylinder chassis through said open end to engage said valve plate between an end of said cylinder liner and said cylinder chassis to define a barrier between a compression end of said cylinder and a head space enclosed by said cylinder chassis, and [0021]retaining a said cylinder liner in this position until said cylinder chassis and said cylinder liner become engaged as said temperature differential reduces. Continue reading about Linear compressor cylinder and head construction... Full patent description for Linear compressor cylinder and head construction Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Linear compressor cylinder and head construction patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Linear compressor cylinder and head construction or other areas of interest. ### Previous Patent Application: Compressor, method for manufacturing the compressor, defroster of refrigerant circuit, and refrigeration unit Next Patent Application: Miniature liquid cooling device having an integral pump therein Industry Class: Pumps ### FreshPatents.com Support Thank you for viewing the Linear compressor cylinder and head construction patent info. 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