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CompressorRelated Patent Categories: Pumps, Condition Responsive Control Of Drive Transmission Or Pump Displacement, Adjustable Cam Or Linkage, Axial Cam, With Sump Pressure ActuationCompressor description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20070065299, Compressor. Brief Patent Description - Full Patent Description - Patent Application Claims
BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] This application claims priority from Korean Patent Application No. 2005-81668 filed Sep. 2, 2005, incorporated herein by reference in its entirety. [0003] The present invention relates to a compressor, and more particularly, to a compressor, which has ribs for directly supporting a part of a valve plate in a suction chamber of a housing, thereby preventing a noise caused by vibration of the valve plate during the strike of a suction reed valve. [0004] 2. Background Art [0005] In general, a compressor constituting an air conditioning device of an automobile is a device for selectively receiving driving power from a power source by a restricting action of an electromagnetic clutch, compressing refrigerant gas by a straight reciprocating motion of pistons after absorbing the refrigerant gas from an evaporator, and discharging it toward a condenser. Such a compressor is classified into various kinds according to compression methods and structures, and out of the compressors of the various kinds, a variable capacity compressor, which can vary a compression volume, has been widely used. [0006] Hereinafter, referring to FIGS. 1 and 2, a prior art variable capacity swash plate type compressor will be described as an example. [0007] The variable capacity swash plate type compressor 1 includes: a cylinder block 10 having a plurality of cylinder bores 11 formed inside the cylinder block 10 axially along a concentric circle; a front housing 20 mounted at the front part of the cylinder block 10 and having a crank chamber 21 formed therein; a rear housing 30 mounted at the rear part of the cylinder block 10 and having a suction chamber 31 and a discharge chamber 32 formed therein; a plurality of pistons 40 reciprocatingly inserted into each of the cylinder bores 11 of the cylinder block 10 and having a bridge 41 at the rear end portion thereof; a driving shaft 50 having an end portion rotatably passing through the front housing 20 and the other end portion rotatably inserted and mounted into the center of the cylinder block 10; a rotor 60 combined to the driving shaft 50 inside the crank chamber 21 and rotating with the driving shaft 50; a swash plate 70 mounted on the circumference of the driving shaft 50 by slidably combining a sleeve 65, having an edge rotatably mounted to an insertion space of the piston bridge 41 by interposing a shoe 45 between the insertion space and the edge of the swash plate 70, and movably connected to a hinge arm 61 of the rotor 60 so as to be rotated together with the rotor 60 and adjust its inclination angle against the driving shaft 50; and a valve unit 80 mounted between the cylinder block 10 and the rear housing 30 to suck refrigerant from the suction chamber 31 into the cylinder bore 11 during a suction stroke and discharge compressed refrigerant from the cylinder bore 11 into the discharge chamber 32 during a compression stroke. [0008] In addition, the inclination angle of the swash plate 70 against the driving shaft 50 can be adjusted according to a change in pressure inside the crank chamber 21 by a control valve 90 mounted in the rear housing 30. [0009] Furthermore, the compression coil spring 55 interposed on the driving shaft 50 between the rotor 60 and the swash plate 70 elastically supports the sleeve 65, to which the swash plate 70 is rotatably combined, against the rotor 60, so that the swash plate 70 can be returned to its original position. [0010] Moreover, the valve unit 80 includes: a valve plate 81 having a refrigerant suction hole 81b and a refrigerant discharge hole 81a; a suction reed valve 82 mounted at a side of the valve plate 81 for opening and closing the refrigerant suction hole 81b; and a discharge reed valve 83 mounted at the other side of the valve plate 81 for opening and closing the refrigerant discharge hole 81a. [0011] Meanwhile, the rotor 60 has a slot 62 formed on the hinge arm 61 thereof, and a connection hinge arm 73 having a hinge pin 74 is formed on a hub 71 of the swash plate 70, which puts opposite the hinge arm 61 of the rotor 60. The connection hinge arm 73 protrudes toward both sides of the hinge arm 61 and is movably combined to the slot 62 of the hinge arm 61. [0012] As described above, in the variable capacity swash plate type compressor 1, a plurality of the pistons 40 arranged along the concentric circle of the cylinder block 10 perform the and backward reciprocating motion in order by the rotation of the swash plate 70. [0013] Here, during the suction stroke of the pistons 40, the suction reed valve 82 of the valve unit 80 is opened by a drop of pressure inside the cylinder bore 11, whereby the cylinder bore 11 and the suction chamber 31 are fluidically communicated with each other and the refrigerant is induced from the suction chamber 31 into the cylinder bore 11. [0014] Additionally, during the compression stroke of the pistons 40, the discharge reed valve 83 of the valve unit 80 is opened while the refrigerant is compressed by a rise of pressure inside the cylinder bore 11, whereby the cylinder bore 11 and the discharge chamber 32 are fluidically communicated with each other and the compressed refrigerant is discharged from the cylinder bore 11 into the discharge chamber 32. [0015] In addition, the swash plate 70 adjusts its inclination angle in correspondence to a difference between pressure inside the crank chamber 21 and suction pressure inside the cylinder bore 11, whereby a discharge volume of the compressor 1 is varied. [0016] However, the suction reed valve 82 strikes a blow to the valve plate 81 while being closed to tightly seal the refrigerant suction hole 81b of the valve plate 81, but in this instance, the valve plate 81 is vibrated and so generates noise when the suction reed valve 82 strikes a blow to the valve plate 81. SUMMARY OF THE INVENTION [0017] Accordingly, the present invention has been made to solve the above disadvantages of the prior arts, and it is an object of the present invention to provide a compressor, which has a rib for directly supporting a part of a valve plate in a suction chamber of a housing, thereby preventing a noise due to shaking of the valve plate during the strike of a suction reed valve. [0018] To accomplish the above objects, according to the present invention, there is provided a compressor including: front and rear housings; a cylinder block mounted between the front and rear housings and having a plurality of cylinder bores; a plurality of pistons mounted inside the cylinder bores and performing a reciprocating motion while cooperating with a rotating motion of a swash plate rotating together with a driving shaft; and a valve unit mounted between one of the front and rear housings, which has a suction chamber and a discharge chamber, and the cylinder block, the valve unit having a suction reed valve and a discharge reed valve mounted at both sides of a valve plate, wherein the suction chamber has support means for directly supporting a part of the valve plate at a position corresponding to each valve plate of the suction reed valve to prevent a noise caused by vibration of the valve plate during the strike of the suction reed valve. BRIEF DESCRIPTION OF THE DRAWINGS [0019] The above and other objects, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments of the invention in conjunction with the accompanying drawings, in which: [0020] FIG. 1 is a sectional view of a prior art compressor; [0021] FIG. 2 is a sectional view of a rear housing of FIG. 1, showing a state where a suction reed valve is located virtually; Continue reading about Compressor... Full patent description for Compressor Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this 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. 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