| Compressor and suction valve structure -> Monitor Keywords |
|
|
 
Compressor and suction valve structureRelated Patent Categories: Pumps, Three Or More Cylinders Arranged In Parallel, Radial, Or Conical Relationship With Rotary Transmission AxisCompressor and suction valve structure description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20060280617, Compressor and suction valve structure. Brief Patent Description - Full Patent Description - Patent Application Claims
TECHNICAL FIELD [0001] The present invention relates to a compressor that compresses coolant gas in a refrigeration cycle of a vehicle air conditioner or the like, and relates, more particularly to a valve structure of the compressor. BACKGROUND ART [0002] A compressor disclosed in Japanese Patent Publication No. 3326909 (first related art) is proposed for the compressor to be used to compress coolant gas. According to the compressor of the first related art, the compressor comprises a cylinder block in which cylinder bores are formed, a crank chamber provided at the front of the cylinder block, and a suction chamber and a discharge chamber provided at the front end of the cylinder block, and a valve provided between the cylinder bore, the suction chamber, and the discharge chamber. The valve further includes a valve plate having a suction hole that communicates between each cylinder bore and the suction chamber, and a discharge hole that communicates between each cylinder bore and the discharge chamber, and also includes so-called a reed valve type suction valve which is provided in the cylinder bore of the valve plate, and can open and close the suction hole. [0003] A piston which is accommodated in each cylinder bore is reciprocated by utilizing the rotation of a drive shaft axially supported within the crank chamber, thereby compressing the coolant taken into each cylinder bore from the suction chamber through the suction hole, and sending out the compressed coolant into the discharge chamber from the discharge hole. [0004] When the operation of the compressor is started in a suspension state, because the coolant volume remaining each of the cylinder bores are different, the coolant pressure fluctuates in the refrigeration cycle immediately after the starting. Therefore, a problem arises such that a suction pressure pulsation occurs and generates noise from an evaporator of the refrigeration cycle until when the operation is stabilized. [0005] In order to solve the above problem, the compressor proposed in the first related art mentioned above decreases the occurrence of noise by providing a pressure reduction path communicated with the suction chamber by forming a rough surface an a valve seat that is in contact with the suction valve, in order to quickly lower the pressure of the coolant within the cylinder bore in the suspension state of the compressor. [0006] Meanwhile, Japanese Patent Application Laid-open No. 52-147302 (second related art) proposes a valve structure of a compressor, according to the second related art, a pressure reduction path, which is comprised of a thin plate being disposed between the suction valve and the valve seat, or comprised of a groove being provided around the suction hole, is provided for discharging the coolant from the cylinder bore into the suction chamber for reducing the pressure. DISCLOSURE OF INVENTION [0007] However, when providing the rough surface on the valve seat forms the pressure reduction path, the size of the pressure reduction path formed between the suction valve and the valve seat is not constant. Therefore, the quantity of the coolant being discharged from a plurality of the suction valve is not uniform, so that there is still a possibility of generating a suction pressure pulsation. [0008] Furthermore, when the groove is provided around the suction hole as described in the second related art, a mechanical processing to provide the groove is carried out in high precision on the valve plate. Therefore, it is troublesome to form the pressure reduction path, which results in high manufacturing cost. [0009] When the thin plate is used, a simple plate has a risk of generating collision noise when the suction valve collides against the thin plate. [0010] The object of present invention is to provide a compressor that can be processed easily and that has clearances (pressure reduction paths) being formed in a uniform size. [0011] In order to achieve the above object, the compressor disclosed in the present invention includes: a cylinder block which has a cylinder bore to accommodate a piston; a crank chamber which is provided at one end of the cylinder block; a suction chamber and a discharge chamber that are provided at the other end of the cylinder block; a valve that is provided between the cylinder bore and the suction chamber and between the cylinder bore and the discharge chamber; a valve plate provided with the valve and having a suction hole to communicate between the cylinder bore and the suction chamber and a discharge hole to communicate between the cylinder bore and the discharge chamber; a suction valve provided with the valve and assemble to the side of the cylinder bore of the valve plate, and the suction valve is comprised of a flexible plate to be able to open and close the suction hole; a drive shaft that is rotatably and axially supported within the crank chamber to reciprocally actuate the piston; and a valve structure in which the suction valve is formed with a suction valve main body, and an opposing part that is integrally formed on the suction valve main body, and faces the suction hole and a valve seat at the opening edge of the suction hole so as to be able to open and close the suction hole, and clearance forming means, which forms a predetermined clearance between the opposing part and the valve seat by isolating the opposing part from the valve seat by a predetermined distance, is formed on at least one of the valve plate and the suction valve. BRIEF DESCRIPTION OF DRAWINGS [0012] FIG. 1 is a cross-sectional view of a valve structure of a compressor showing a relationship between a valve seat of a suction hole and an opposing part, according to a first embodiment of the present invention. [0013] FIG. 2 is a cross-sectional view of a compressor according to the present invention. [0014] Fig.3A shows a top plan view of the valve plate, and FIG. 3B shows a cross-sectional view of the valve plate cut along a line IIIB-IIIB in FIG. 3A. [0015] FIG. 4A shows a top plan view showing a front surface of the suction valve, FIG. 4B shows a top plan view showing a back surface of the suction valve onto which a coating layer is formed, and FIG. 4C shows a cross-sectional view of the suction valve cut along a line IVC-IVC in FIG. 4B. [0016] FIG. 5A shows a top plan view of the valve plate, FIG. 5B shows a cross-sectional view of the valve plate cut along a line VB-VB in FIG. 5A, and FIG. 5C shows a cross-sectional view of the valve plate showing a relationship with a opposing part. [0017] FIG. 6 is a partly cross-sectional view of a suction valve and a valve plate according to a third embodiment of the present invention. [0018] FIG. 7 is a partly cross-sectional view of a suction valve and a valve plate according to a fourth embodiment of the present invention. [0019] FIG. 8 is a partly cross-sectional view of a suction valve and a valve plate according to a fifth embodiment of the present invention. [0020] FIGS. 9A and 9B show a sixth embodiment of the present invention, FIG. 9A shows a partly cross-sectional view of the suction valve and the valve plate, and FIG. 9B shows a partly enlarged view of FIG. 9A. Continue reading about Compressor and suction valve structure... Full patent description for Compressor and suction valve structure Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Compressor and suction valve structure 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 Compressor and suction valve structure or other areas of interest. ### Previous Patent Application: Displacement control valve of variable displacement compressor Next Patent Application: Remanufacturing hydraulic pumps Industry Class: Pumps ### FreshPatents.com Support Thank you for viewing the Compressor and suction valve structure patent info. IP-related news and info Results in 0.14236 seconds Other interesting Feshpatents.com categories: Accenture , Agouron Pharmaceuticals , Amgen , AT&T , Bausch & Lomb , Callaway Golf 174 |
 * Protect your Inventions * US Patent Office filing 
PATENT INFO |
|
