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Reciprocating compressorRelated Patent Categories: Pumps, Motor Driven, Electric Or Magnetic Motor, Reciprocating Rigid Pumping Member, Reciprocating Motor, Unitary Pump And Motor Working MemberReciprocating compressor description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20060210411, Reciprocating compressor. Brief Patent Description - Full Patent Description - Patent Application Claims
TECHNICAL FIELD [0001] The present invention relates to a reciprocating compressor, and particularly to a reciprocating compressor that can be compact in size and having improved performance. BACKGROUND ART [0002] FIG. 1 is a sectional view showing a reciprocating compressor in accordance with one example of a conventional art. [0003] A conventional reciprocating compressor includes a close casing to which a suction pipe 102 and a discharge pipe 104 are connected respectively; a driving unit 108 disposed in the casing 106 and generating a reciprocal movement force; a compression unit 110 transmitted the reciprocal movement force generated at the driving unit 108 and compressing a fluid; a support portion 112 supporting the driving unit 108 and the compression unit 110. [0004] The driving unit 108 includes an outer stator 116 fixed at the support portion 112 and having a winding coil 114 to which power is applied; an inner stator 118 disposed at an inner circumferential surface of the outer stator 116 with a predetermined air gap therebetween; a magnet 120 positioned at the air gap between the outer stator 116 and the inter stator 118 and linearly and reciprocally moved when power is applied to the winding coil 114; and a moving member 122 mounted to the magnet 120 at a same interval in a circumferential direction and transmitting a linear movement of the magnet 120 to the piston 124 by being coupled with a piston 124 of the compression unit 110. [0005] The compression unit 110 includes a piston 124 linearly and reciprocally moved by being coupled with the moving member 122; a cylinder 130, in which the piston 124 is slidably inserted, having a compression chamber; and a suction valve 132 installed at a front portion of the piston 124 to prevent the fluid introduced into the compression chamber from being flowed backwardly; a discharge valve assembly 134 installed at a front portion of the cylinder 130 to perform an open-and-shut action of a discharged fluid. [0006] The support unit 112 includes a first frame 140 to which the inner stator 118 is fixed, mounted to an outer circumferential surface of the cylinder 130, and supporting one side surface of the outer stator 116; a second frame 142 supporting the other side surface of the outer stator 116; a third fame 144 coupled with the second frame 142 and receiving a resonant spring unit 146, [0007] The resonant spring unit 146 for inducing a resonant movement of the piston 124, includes a first resonant spring 148 interposed between the first frame and one side surface of a connecting portion 152 between the moving member 122 and the piston 124, and providing an elastic force to the piston 124 when the piston 124 is rearwardly moved; and second resonant spring 150 interposed between the other side surface of the connecting portion 152 and the third frame 144, and providing an elastic force to the piston 124 when the piston 124 is forwardly moved in order to compress a fluid. [0008] Herein, the first resonant spring 148 and the second resonant spring 150 are formed of a compression coil spring. The first resonant spring 148 has a bigger diameter than an outer diameter of the cylinder 130 and positioned at the outer circumferential surface of the cylinder 130, and the second resonant spring 150 is positioned at a rear portion of the compression unit 110. [0009] In the convention reciprocating compressor, when power is applied to a winding coil 114, a flux is formed between the outer stator 115 and the inner stator, and thus the magnet 120 and the moving member 122 are linearly and reciprocally moved. While the piston 124 connected to the moving member 122 is linearly and reciprocally moved in the cylinder 130, a fluid is compressed. [0010] At this time, when the piston 124 forwardly moves to compress a fluid, an elastic force of a second resonant spring 150 is provided to the piston 124, and when moving rearwardly, an elastic force of a first resonant spring 148 is provided to the piston 124. [0011] However, in the conventional reciprocating compressor, the first resonant spring 148 is positioned in a space between an outer circumferential surface of the cylinder 130 and an inner circumferential surface of the inner stator 118. Accordingly, a width of a compressor should be big because a predetermined space should be secured to install the first resonant spring 148 between the outer circumferential surface of the cylinder 130 and the inner stator 118. [0012] Also, since the first and the second springs 148 and 150 are formed of a compression coil spring having a torsion moment, and are disposed at the both sides of a connection unit 152 between the moving member 122 and the piston respectively, the torsion moment occurs while the first and the second springs 148 and 150 repeatedly compress and expand. Because of this, it is difficult for the piston 124 to keep its linear movement, so performance of a motor is deteriorated. [0013] FIG. 2 is a sectional view showing a reciprocating compressor for solving those problems according to another example of the conventional art. [0014] In a reciprocating compressor shown in FIG. 2, a compression unit 110 is disposed at a front portion of a casing 106 and fixed at a first frame 162, and a driving unit 108 is disposed at a rear portion of the casing 106, and fixed at second and third frames 164 and 166. A moving member 122 of the driving unit 108 and a piston 124 are connected mechanically and a spring supporting member is disposed at a connection portion of the moving member 122 and the piston 124. [0015] Also, plural first resonant springs 172 are disposed between the first frame 162 and a front portion surface of the spring supporting member 176 at a predetermined interval in a circumferential direction. Plural second resonant springs 174 are disposed between a rear portion surface of the spring supporting member 176 and the second frame at a predetermined interval in a circumferential direction. [0016] In the reciprocating compressor, a width of the compressor 110 can be reduced since the driving unit 108 and the compression unit 110 are positioned at front and rear portions of the casing 106 respectively and the first resonant spring 172 and the second resonant spring 174 are disposed at an outer circumferential portion of the compression 110. Also, since the plural first and second resonant springs 172 and 174 are disposed in a circumferential direction, a torsion moment caused by repeated compression and expansion of the springs can be reduced. [0017] However, in the reciprocating compressor according to the conventional art, the driving unit 108 generating a reciprocal movement force and the compression unit 110 transmitted the movement force from the driving unit 108 are disposed at the front portion and at rear portions of the compressor at a predetermined interval. Accordingly, it is difficult to adjust a concentricity of the driving unit 109 and the compression unit 110, and thus degrading of assembling is caused. [0018] That is, even though a concentricity of the inner and outer stators 116 and 118 of the driving unit 108 has been adjusted, a concentricity of the driving unit 108 and the piston 124 of the compression unit 110 has to be adjusted again, and thus a difficulty of assembling is caused. [0019] In addition, since the driving unit 108 and the compression unit 110 are disposed at the front and rear portions of the casing 106 respectively, the concentricity of the piston 124 is severely deviated even though the concentricity of the moving member 122 is little bit deviated during an operation of the compressor. This causes a collision of the cylinder 130 and the piston 124 and, accordingly, performance of the compressor is deteriorated. DISCLOSURE OF THE INVENTION [0020] Therefore, it is an object of the present invention to provide a reciprocating compressor capable of moving a resonant spring horizontally and straight forwardly by reducing a torsion moment of the resonant spring, reducing a width of the compressor, and maintaining a concentricity of a driving unit and a compression unit. [0021] To achieve the above objects, there is provided a reciprocating compressor including a driving unit having an outer stator and an inner stator disposed at a predetermined air gap therebetween, and a moving member positioned between the outer stator and the inner stator and linearly and reciprocally moved; a cylinder fixed at an inner circumferential surface of the inner stator; a compression unit coupled with the moving member and linearly and reciprocally moved in the cylinder; a support unit for supporting the compression unit and the driving unit; a resonant spring unit disposed at a rear portion of the driving unit, disposed at the support portion and inducing a resonant movement of the piston. Continue reading about Reciprocating compressor... Full patent description for Reciprocating compressor Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Reciprocating compressor 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 Reciprocating compressor or other areas of interest. ### Previous Patent Application: Reciprocating pump apparatus and method using same Next Patent Application: Bracketless magnetic pump Industry Class: Pumps ### FreshPatents.com Support Thank you for viewing the Reciprocating compressor patent info. IP-related news and info Results in 1.05427 seconds Other interesting Feshpatents.com categories: Accenture , Agouron Pharmaceuticals , Amgen , AT&T , Bausch & Lomb , Callaway Golf 174 |
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