[0031] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the examples shown in the accompanying drawings.
[0032] There are multiple embodiments of the suction valve assembly of the compressor according to the present invention, and one of the most preferred embodiments will be described below.
[0033] Figure 4 Is a partial cross-sectional view of the compressor adopting the suction valve assembly of the present invention, and Figure 5 Yes Figure 4 An enlarged schematic diagram of part "B".
[0034] The compressor of the present invention includes a cylinder 4 fixed at the compressor housing (not shown) and forming a compression chamber 2, and a piston 6 arranged to be linearly reciprocating in the cylinder 4 to compress fluid and forming a suction passage 8. , And a suction valve assembly installed on the front side of the piston 6 and preventing the fluid from flowing back from the compression chamber 2 to the suction passage 8.
[0035] The piston 6 can reciprocate sealingly in the cylinder 4, and a suction passage 8 for sucking fluid is formed in the piston along the longitudinal direction. The supporting portion 12 is installed on the front side of the piston 6, and a plurality of suction holes 10 are formed on the supporting portion 12, and the fluid sucked into the suction passage 8 is supplied to the compression chamber 2 through the suction holes 10. The valve seat 14 is formed on the front side of the support portion 12 in the shape of a tapered hole having a certain angle.
[0036] The suction valve assembly includes a valve body 16 in contact with the valve seat 14 to switch fluid and a support rod 18. The support rod 18 is connected between the valve body 16 and the support portion 12 and supports the valve body 16 so as to be moved within a certain range.
[0037] The outer peripheral surface of the valve body 16 is formed into a tapered shape so as to closely adhere to the inner peripheral surface of the valve seat 14, and the front side of the valve body 16 that forms a compression chamber together with the inner peripheral surface of the cylinder 4 is formed as a flat surface to prevent compression A dead zone is formed in the chamber 2, a through hole 20 is formed on the rear side of the valve body 16, a support rod 18 is inserted into the through hole 20, and a space portion 22 is formed inside the through hole 20. After the support rod 18 is inserted, the support rod 18 can Move within a certain range in the space part.
[0038] One side of the support rod 18 is fixed to the support part 12, and a release preventing device is formed at the other end thereof to prevent the support rod 18 from being detached from the space part 22 after the support rod 18 is inserted into the through hole 20 of the valve body 16.
[0039] The support rod 18 is preferably molded integrally with the support part 12 in a manner of protruding from the front side of the support part 12.
[0040] In addition, the supporting part and the supporting rod can also be manufactured separately, and then they can be fitted together.
[0041] Regarding the disengagement prevention device, in order to prevent the support rod 18 from being detached after the support rod 18 is inserted into the through hole 20 of the valve body 16, an external thread 24 having a diameter larger than the diameter of the support rod 18 is formed at the end of the support rod 18, and the external thread 24 A screw-fitted internal thread 26 is formed on the inner peripheral surface of the through hole 20.
[0042] That is, after the external thread 24 of the support rod 18 and the internal thread 26 are screw-fitted, the external thread 24 of the support rod 18 is movably located in the space portion 22 of the valve body. Subsequently, when the valve body 16 is linearly moved, the external thread 24 is hooked inside the space portion 22, thereby preventing the valve body 16 from disengaging.
[0043] In addition to manufacturing the structure of the disengagement preventing device having external and internal threads, as long as the supporting rod can be prevented from disengaging after the supporting rod is inserted into the space portion, any other structure can also be applied to the disengagement preventing device.
[0044] Such as Figure 5 As shown, referring to the space portion 22 of the valve body, when the valve body 16 is tightly attached to the valve seat 14, there is a gap on the front side of the valve body 16 and the external thread 24. As a result, when the valve body 16 moves, the space The inner peripheral surface of the portion 22 and the external thread 24 are not in contact with each other, thereby preventing noise and vibration from occurring.
[0045] The operation of the suction valve assembly of the compressor of the present invention as described above will be described in detail below.
[0046] Figure 6 Is a schematic diagram showing the use state of the compressor using the suction valve assembly of the present invention, and Figure 7 Yes Figure 6 An enlarged schematic diagram of part "C".
[0047] First, in the case that the fluid in the suction passage 8 is supplied to the compression chamber 2, when the piston 6 is withdrawn with the operation of the driving device (not shown), following the flow of the fluid and the movement of the piston, due to the inertia valve The body 16 is disengaged from the valve seat 14 and, as a result, the fluid introduced into the suction passage 8 is supplied to the compression chamber 2 through the suction hole 10.
[0048] At this time, the external thread 24 formed at the end of the support rod 18 is hooked on the space portion 22 of the valve body 16 to prevent the valve body 16 from being separated from the piston 6.
[0049] In this state, when the piston 6 moves forward to compress the fluid, the valve body 16 is tightly attached to the valve seat 14 due to the inertia of the forward movement of the piston 6 and the pressure of the fluid filled in the compression chamber 2. In this way, the fluid in the compression chamber 2 can be prevented from flowing back to the suction side.
[0050] Since the front surface of the valve body 16 constituting a part of the compression chamber 2 is formed as a plane, a dead zone cannot be formed in the compression chamber 2, and therefore the compression efficiency of the fluid can be increased.
[0051] At this time, when the valve body 16 and the valve seat 14 are closely attached to each other, a gap is maintained between the front surface of the external thread 24 of the support rod 18 and the inner wall of the space portion 22. As a result, when the valve body 16 is opened and closed According to the contact between the external thread 24 and the inner peripheral surface of the space portion 22, noise and vibration can be prevented, and the close adhesion between the valve body 16 and the valve seat 14 can be maintained.
[0052] As mentioned, the suction valve assembly of the compressor according to the present invention has the following advantages.
[0053] That is, the front surface of the valve body of the suction valve assembly constituting the compression chamber is flat, so no dead space is formed, and the compression efficiency of the fluid can be improved.
[0054] In addition, since there is no fluid leakage, precise machining of parts for sealing fluids is not required. Therefore, manufacturing costs can be reduced, and reduction in compression efficiency due to fluid leakage can be prevented.
[0055] The present invention can be embodied in various forms without departing from the spirit and essential characteristics of the present invention. Therefore, it should be understood that the above-mentioned embodiments are only exemplary and do not constitute a limitation to the present invention. Without departing from the scope of the present invention, it is obvious that those skilled in the art can make many substitutions, modifications and changes to the present invention, and they should all be included in the protection scope of the present invention.
