KR200267900Y1 - Valve assembly for hermetic compressor - Google Patents

Abstract

The present invention relates to a valve assembly of a hermetic compressor. In the present invention, the suction valve plate 31, the valve plate 33, the discharge valve plate 35, and the gasket 37 and the head cover 50, which constitute the valve assembly 30, are not disturbed arbitrarily. Improve workability of assembly work. To prevent this, the valve assembly 30 is prevented from being detached to at least one of the components closest to the distal end of the bolt 60 which fastens the valve assembly 30 to the cylinder block 40, for example, the bolt hole 38 of the suction valve plate 31. The protrusion 39 is formed. The stripping prevention protrusion 39 protrudes by a length corresponding to a gap formed between the bolt hole 38 and the bolt 60 to be in close contact with or caught on the outer circumferential surface of the bolt 60 to prevent the suction valve plate 31. Prevent removal. In this case, the provisional assembly state of the valve assembly is not easily disturbed, and thus the mounting workability of the valve assembly is greatly improved.

Description

Valve assembly for hermetic compressor

The present invention relates to a hermetic compressor, and more particularly to a valve assembly for controlling the flow of the working fluid flowing in and out of the compression chamber.

In general, a hermetic compressor can be divided into a scotch yoke type and a connecting rod type according to a method of converting the rotation of the crankshaft into a linear reciprocation of the piston. 1 shows an internal configuration of a hermetic compressor of a connecting rod type.

According to this, the sealed container 1 which consists of the upper container 1t and the lower container 1b is provided, and the frame 2 is provided in the inside of the said sealed container 1. The stator 3 is fixed to the frame 2, and the frame 2 is supported inside the sealed container 1 by a spring 2S. The crankshaft 5 is provided through the center of the said frame 2. The crankshaft 5 is integrally provided with a rotor 4 and rotated together with the crankshaft 5 by electromagnetic interaction with the stator 3.

An eccentric pin 5b is formed on the upper end of the crankshaft 5 so as to be eccentric with respect to the rotation center of the crankshaft 5. And the counterweight (5c) is formed on the opposite side formed with the eccentric pin (5b). Reference numeral 5a denotes a passage formed inside the crankshaft 5 for supplying the oil L. As shown in FIG.

On the other hand, the cylinder block 6 provided with the compression chamber 6 'is formed integrally with the frame 2. In the compression chamber 6 ′, a piston 7 connected to the eccentric pin 5b of the crankshaft 5 and the connecting rod 8 is provided. At the front end of the cylinder block 6, a valve assembly 15 for controlling a working fluid flowing into and out of the compression chamber 6 is installed. A silencer 11 for reducing noise generated by the working fluid is connected to the head cover 10.

Reference numeral 5d is a pumping mechanism for sucking oil L into the passage 5a, 12 is a suction pipe for delivering a working fluid to the inside of the hermetic container 1, and 13 is a compressed working fluid outside the compressor. The discharge pipe discharged to the.

In the general hermetic compressor having such a configuration, the configuration of the cylinder block 6 detachably attached to the frame 2, the valve assembly 15 and the head cover 10 mounted thereto is shown in detail in FIG. . According to this, the cylinder block 6 is formed in the lower end of the cylinder base (6b) that is seated on the upper surface of the frame (2). The cylinder base 6b is formed with a mounting hole 6m through which a bolt (not shown) for mounting to the frame 2 passes. The cylinder block 6 is formed in a quadrangular shape with a cylinder front surface 6f on which the valve assembly 15 is mounted. In the cylinder front surface 6f, fastening holes 6h for fastening the head cover 10 and the valve assembly 15 are formed at four corners.

A suction valve plate 21, a valve plate 23, a discharge valve plate 25, and a gasket 27 are sequentially installed between the cylinder front surface 6f and the head cover 10. The suction plate 23i and the discharge hole 23e are drilled in the valve plate 23, respectively. The suction hole 32i is opened and closed by a suction valve 22 formed in the suction valve plate 21. The discharge hole 23e is opened and closed by the discharge valve 26 in the discharge valve plate 25.

On the other hand, the four holes of each of the elements constituting the valve assembly 15 is bored with a bolt hole (H), respectively. The bolt holes H correspond to the fastening holes 6h drilled in the cylinder block 6 and the bolt holes 10 'drilled in the head cover 10, respectively. ) Is penetrated and fastened to the fastening hole 6h so that the valve assembly 15 and the head cover 10 are fastened to the cylinder block 6.

However, the prior art as described above has the following problems.

In general, the valve assembly 15 and the head cover 10 are temporarily assembled in a state where the bolt 29 is penetrated, and fastened to the cylinder block 6. However, the diameters of the bolt holes H perforated at four corners of the suction valve plate 21, the valve plate 23, the discharge valve plate 25, and the gasket 27 constituting the valve assembly 15 are the above. It is formed relatively larger than the diameter of the bolt 29.

Therefore, a state in which the bolt 29 penetrates through the bolt hole 10 'of the head cover 10 and the bolt hole H of the valve assembly 15 can be easily distracted during transportation for assembly. . As a result, when the head cover 10 and the valve assembly 15 are put into the assembly line in such a state, a problem arises in that workability of the assembly work is greatly deteriorated.

Accordingly, an object of the present invention is to solve the problems of the prior art as described above, and to provide a valve assembly in which the preassembled state is not randomly disturbed.

1 is a cross-sectional view showing the internal configuration of a typical hermetic compressor.

Figure 2 is an exploded perspective view showing the valve assembly and peripheral configuration of a hermetic compressor according to the prior art.

Figure 3 is an exploded perspective view showing a preferred embodiment of the valve assembly of the hermetic compressor according to the present invention and its peripheral configuration.

Explanation of symbols on the main parts of the drawings

1: airtight container 2: frame

3: stator 4: rotor

5: crankshaft 6: cylinder block

7: piston 8: connecting rod

9: valve assembly 10: head cover

11: Silencer 15: Valve Assembly

30: valve assembly 31: suction valve plate

32: suction valve 33: valve plate

33i: suction hole 33e: discharge hole

35: discharge valve plate 36: discharge valve

37: gasket 38: bolt hole

39: stripping prevention protrusion 40: cylinder block

42: front cylinder 43: fastening hole

45: cylinder base 50: head cover

51: discharge chamber 52: bolt hole

60: bolts

According to a feature of the present invention for achieving the above object, the present invention is a valve plate which is formed through the discharge hole and the suction hole and has a plurality of bolt holes for fastening the bolt, and is in close contact with one surface of the valve plate A suction valve plate installed to open and close the suction hole to form a bolt hole corresponding to the bolt hole, and a discharge valve plate installed to be in close contact with the other surface of the valve plate to open and close the discharge hole and to form a bolt hole corresponding to the bolt hole. And at least one bolt hole of the valve plate, the suction valve plate, and the discharge valve plate positioned adjacent to the tip end portion of the bolt, wherein a stripping prevention protrusion is formed on the outer circumferential surface of the bolt. .

The stripping prevention protrusions are formed to have a protruding length corresponding to the gap between the bolt hole and the bolt, and a plurality of the protrusion preventing protrusions are formed at predetermined angle intervals in the bolt hole.

The valve assembly according to the present invention having such a configuration has an advantage that the preassembled state is not disturbed during the transfer to the assembly line, thereby greatly improving workability of the assembly work.

Hereinafter, a preferred embodiment of the valve assembly of the hermetic compressor according to the present invention as described above will be described in detail with reference to the accompanying drawings.

3 is an exploded perspective view of the valve assembly and the peripheral parts of the hermetic compressor according to the present invention. According to this, the valve assembly 30 is composed of the suction valve plate 31, the valve plate 33, the discharge valve plate 35 and is further provided with a gasket 37 for preventing the working fluid from leaking. do.

The suction valve plate 31 is formed with a suction valve 32. The suction valve plate 31 is installed in close contact with the cylinder front surface 42 of the cylinder block 40 to be described below. The valve plate 33 is installed to be in close contact with the rear surface of the suction valve 32. The valve plate 33 penetrates through the center thereof to form a suction hole 33i and a discharge hole 33e. The suction hole 33i is opened and closed by the suction valve 32.

The discharge valve plate 35 is provided on the rear surface of the valve plate 33. A discharge valve 36 is formed in the discharge valve plate 35 to open and close the discharge hole 33e of the valve plate 33. A gasket 37 is interposed between the discharge valve plate 35 and the head cover 50 to be described below to prevent leakage.

Meanwhile, four holes of the suction valve plate 31, the valve plate 33, the discharge valve plate 35, and the gasket 37 are bored with a bolt hole 38 through which the bolt 60 penetrates. The bolt hole 38 is generally formed to a diameter slightly larger than the diameter of the bolt 60.

Here, one of the components of the valve assembly 30 is in close contact with the cylinder front surface 42 of the cylinder block 40, in this embodiment one of the bolt hole 38 of the suction valve plate 31, the removal prevention projections 39 is formed. The stripping prevention protrusion 39 is formed around the inner surface of the bolt hole 38 and extends a predetermined length toward the center of the bolt hole 38. These stripping prevention projections 39 are preferably formed at regular angular intervals. Protruding length of the removal preventing protrusion 39 is preferably about the gap between the bolt hole 38 and the bolt 60.

Of course, even if the protruding length of the removal preventing protrusion 39 is shorter than the gap, the suction valve plate 31 may not be detached from the bolt 60 arbitrarily. In more detail, when the stripping prevention protrusion 39 has a protruding length shorter than the gap, the surface of the suction valve plate 31 is installed to be exactly perpendicular to the longitudinal direction of the bolt 60. The suction valve plate 31 may be removed from the bolt 60 only when the bolt 60 is located at the center of the bolt hole 38. Therefore, the removal of the suction valve plate 31 can be prevented even if it is somewhat short except when the protrusion length of the removal preventing protrusion 39 is too short.

Next, referring to the configuration of the cylinder block 40 to which the valve assembly 30 is mounted, the compression chamber 41 is formed through the center of the cylinder block 40. The working fluid is compressed into and discharged from the compression chamber 41 while being controlled by the valve assembly 30.

The front surface of the cylinder block 40, that is, the portion on which the suction valve plate 31 is mounted is precisely machined into the cylinder front surface 42. Fastening holes 43 are drilled in the four corners by penetrating rearward from the cylinder front face 42. The fastening hole 43 is formed at a position corresponding to the bolt hole 38 of the valve assembly 30. The bottom of the cylinder block 40 is formed by a cylinder base 45, the cylinder base 45 is provided with a mounting hole 46 is fastened to the frame.

And looks at the configuration of the head cover 50 is fastened to the cylinder block 40 together with the valve assembly (30). The discharge chamber 51 is formed in the head cover 50 to communicate with the discharge hole 33e to discharge the working fluid compressed in the compression chamber 41. Bolt holes 52 through which the bolt 60 penetrates are formed at four corners of the head cover 50, respectively. The bolt hole 52 is drilled at a position corresponding to the bolt hole 38 of the valve assembly 30.

Hereinafter, the operation of the valve assembly according to the present invention having the configuration as described above will be described in detail.

The valve assembly 30 is coupled to the cylinder front surface 42 of the cylinder block 40 by the bolt 60 together with the head cover 50. That is, the suction valve plate 31, the valve plate 33, the discharge valve plate 35, and the gasket 37 constituting the valve assembly 30 are sequentially stacked, and the head cover 50 is disposed on the gasket 37. ) Is positioned, and penetrates the bolt 60 through the bolt holes 52 and 38. In this case, all four bolts may be inserted into the bolt holes 52 and 38, but only at least two bolts may be inserted.

Such a state is a state in which the valve assembly 30 and the head cover 50 are temporarily assembled. At this time, the removal prevention protrusion 39 formed in one of the bolt hole 38 of the suction valve plate 31 which is the most closest part of the valve assembly 30, that is, the part closest to the front end of the bolt 60 is the The outer peripheral surface of the bolt 60 is in close contact with or caught. By doing so, the entire valve assembly 30 including the suction valve plate 31 is prevented from being detached from the bolt 60.

On the other hand, when the removal prevention projection 39 has a protruding length such as a gap between the bolt 60 and the bolt hole 38 is in close contact with the outer circumferential surface of the bolt 60 to remove the suction valve plate 31 Prevent it. When the protruding length of the stripping prevention protrusion 39 has a protruding length shorter than the gap between the bolt 60 and the bolt hole 38, the suction valve plate 31 is exactly perpendicular to the bolt 60. The removal preventing protrusion 39 is caught on the outer circumferential surface of the bolt 60 so as to restrict the removal of the suction valve plate 31 unless it is positioned to.

In this way, when the suction valve plate 31 is prevented from being detached from the bolt 60 by the presence of the removal preventing protrusion 39, the valve assembly 30 including the head cover 50 is bolted ( 60), the pre-assembled state is not disturbed.

The valve assembly 30 and the head cover 50 in the assembled state as described above are transferred to the main assembly line to fasten the bolt 60 to the fastening hole 43 formed in the front surface 42 of the cylinder. It is mounted to the block 40.

The valve assembly of the hermetic compressor according to the present invention as described in detail above can maintain the assembled state of the valve assembly for a long time by forming a removal preventing protrusion in at least one bolt hole closest to the tip of the bolt. Doing. In this way, the pre-assembled state of the valve assembly can be introduced into the assembly line without disturbing, thereby achieving an effect of greatly improving the mounting workability of the valve assembly.

Claims (2)

A valve plate formed through the discharge hole and the suction hole and having a plurality of bolt holes for fastening the bolts; A suction valve plate installed in close contact with one surface of the valve plate to open and close the suction hole and to form a bolt hole corresponding to the bolt hole; And a discharge valve plate installed in close contact with the other surface of the valve plate to open and close the discharge hole and form a bolt hole corresponding to the bolt hole. The at least one bolt hole of the valve plate, the suction valve plate and the discharge valve plate positioned adjacent to the tip end portion of the bolt is formed with a stripping prevention protrusion which is in close contact with the tip of the outer peripheral surface of the bolt. Valve assembly. The valve assembly of claim 1, wherein the stripping prevention protrusions are formed to have a protruding length corresponding to a gap between the bolt hole and the bolt.