KR20040020434A - A discharge silencer mounting structure for hermetic compressor - Google Patents

Abstract

PURPOSE: A structure for mounting a discharge muffler of a hermetic type compressor is provided to minimize the sizes of a head cover and a head plate. CONSTITUTION: A cylinder(50) has a compression chamber(52) inside, and a mount blade(54) installed at an end, vertical to a formation direction of the compression chamber. A discharge muffler(70) is mounted at the mount blade by a coupling boss(55) integratedly formed with the mounting blade, and reduces a noise and pulsation of an operating fluid compressed in the compression chamber. A head cover part(60) is coupled with a surface of an entrance of the compression chamber together with a valve assembly, and includes a discharge room(65) connecting the compression chamber with the discharge muffler.

Description

A discharge silencer mounting structure for hermetic compressor

The present invention relates to a hermetic compressor, and more particularly, to a structure in which a discharge silencer is installed in a cylinder to reduce discharge noise of a working fluid compressed at high pressure.

Figure 1 shows the internal configuration of a hermetic compressor of the connecting rod method according to the prior art. According to this, the frame 2 is installed in the sealed container 1 which consists of the upper container 1t and the lower container 1b. The frame 2 is supported inside the hermetically sealed container 1 by a spring 2S, and the frame 2 has a crankshaft 5 by electromagnetic interaction with the rotor 4 to be described below. The stator 3 for rotating) is fixed.

The crankshaft 5 is provided through the center of the said frame 2. The crankshaft 5 is provided with a rotor 4 integrally. The outer circumferential surface of the rotor 4 is installed to have a predetermined gap with the inner circumferential surface of the stator 3, and the rotor 4 is provided with the crankshaft 5 by electromagnetic interaction with the stator 3. Is rotated together.

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. A counterweight 5c is formed on the opposite side where the eccentric pin 5b is formed. At the lower end of the crankshaft 5, a pumping mechanism 5d for sucking up the lubricating oil L on the bottom surface of the lower container 1b into the oil passage 5a formed on the crankshaft 5 is provided. .

On the other hand, a cylinder 6 having a compression chamber 6 'formed therein is provided in the frame 2. The cylinder 6 is formed separately from the frame 2 by casting and is mounted to the frame 2. At both ends of the cylinder 6, mounting holes 6h for mounting to the frame 2 are formed. A piston 7 is provided in the compression chamber 6 ', which is connected to the eccentric pin 5b of the crankshaft 5 by a connecting rod 8. The eccentric pin 5b is connected to the crankshaft connecting portion 8a of the connecting rod 8, and the piston connecting portion 8b of the piston 7 and the connecting rod 8 is connected by a piston pin 7 ′. Connected.

In addition, a valve assembly 9 is installed at the front end of the cylinder 6 to control the flow of the working fluid flowing into and out of the compression chamber 6 '. The head assembly 10 is mounted on the valve assembly 9 to form a discharge chamber 10 ′ (see FIG. 3) through which the working fluid discharged after being compressed is passed. In addition, reference numeral 12 is a suction pipe for delivering the working fluid to the interior of the sealed container 1, 13 is a discharge pipe for discharging the compressed working fluid to the outside of the compressor.

On the other hand, the suction muffler 11 for reducing the noise generated by the working fluid is in communication with the compression chamber 6 'inside the cylinder 6 through the valve assembly 9.

Then, a configuration for reducing the noise of the working fluid discharged by compression is provided, which will be described with reference to FIG. A discharge passage 14 is formed through the cylinder 6 so as to communicate with the discharge chamber 10 'formed by the head cover 10. One side of the frame (2) is formed with a discharge noise section 16 through which the working fluid delivered through the discharge passage 14 flows. The discharge noise part 16 is covered with a noise part cover 17 to form a noise chamber 16 ′ for noise therein. In addition, a loop pipe 18 for discharging the working fluid from the discharge silencer 16 is provided through the silencer cover 17.

In addition, the silencer cover 17 is fastened by a bolt 19 fastened to the fastening boss 16b of the discharge noise canceller 16 so that the silencer 16 'is provided inside the discharge noise canceller 16. To form. The diaphragm 21 is provided in the silencer 16 'to partition the inside of the silencer 16' to increase the noise effect.

The diaphragm 21 has a through-hole 22 formed in the center thereof to communicate the noise chamber 16 'divided into two parts, and penetrate the through-hole 22 to allow the bolt 19 to connect the fastening boss ( 16b) is fastened to the frame 2 together with the silencer cover 17 fastened by the bolt 19. Reference numeral 19 'is a washer and 20, 20' is a packing.

On the other hand, Figure 4 and Figure 5 shows the configuration of the cylinder and the silencer according to another prior art. According to this, the valve assembly 26 is mounted on the front of the cylinder 22 in which the compression chamber 24 is formed to control the flow of the working fluid into and out of the compression chamber 24. The head plate 28 is fastened to the cylinder 22 together with the valve assembly 26. The head plate 28 is provided with a head cover 30, the discharge chamber 31 is formed therein.

Both ends of the head plate 28, that is, the remaining portions except for the portion in which the valve assembly 26 is in close contact are provided with the suction silencer 32 and the discharge silencer 34, respectively. The silencers 32 and 34 are fastened to the head plate 28 by blazing welding.

The suction silencer 32 removes noise of the working fluid entering the compression chamber 24, and the discharge silencer 34 removes noise of the working fluid from the compression chamber 24. The suction silencer 32 is connected to a suction pipe 33 for delivering a working fluid, and the discharge silencer 34 is provided with a discharge pipe 35 for discharging the working fluid.

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

First, in the prior art shown in Figs. 2 and 3, the discharge noise section 16 is formed on one side of the cylinder 6, and a mounting hole 6h for mounting the cylinder 6 to the frame 2 is provided. ) Is not symmetrical at both ends of the cylinder (6). Therefore, in fixing the cylinder 6 to the frame 2, the fastening positions of the bolts are different so that it is difficult to install the cylinder 6 to the frame 2 accurately and have the same overall adhesion. As a result, vibration and noise occur between the frame 2 and the cylinder 6 during operation of the compressor.

In addition, since the silencers 32 and 34 are mounted on the head plate 28 in the prior art illustrated in FIGS. 4 and 5, the size of the head plate 28 and the head cover 30 increases and the possibility of leakage occurs. There is a problem that the production cost increases.

Therefore, an object of the present invention is to solve the conventional problems as described above, to minimize the size of the head cover and the head plate.

Another object of the present invention is to mount the cylinder to the frame more stably.

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

Figure 2 is a front view schematically showing the configuration of the discharge noise reduction device of the hermetic compressor according to the prior art.

3 is a schematic cross-sectional view taken along the line AA ′ of FIG. 2.

Figure 4 is an exploded perspective view showing a cylinder and the peripheral configuration of a hermetic compressor according to the prior art.

5 is a plan view showing the configuration of the head cover and the silencer of the hermetic compressor shown in FIG.

Figure 6 is a perspective view showing the configuration of a preferred embodiment of the discharge silencer mounting structure of the hermetic compressor according to the present invention.

Figure 7 is an exploded cross-sectional view showing the configuration of an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

50: cylinder 52: compression chamber

54: mounting wing 55: tightening boss

58: fixed piece 60: head cover portion

62: head plate 64: head cover

65: discharge chamber 70: discharge silencer

72: noise main body 73: noise chamber

76: bolt

According to a feature of the present invention for achieving the above object, the present invention is a compression chamber is formed therein and a cylinder in which the mounting wing is formed to be perpendicular to the forming direction of the compression chamber at one end, and the mounting wing A discharge silencer for reducing the pulsation and noise of the working fluid compressed in the compression chamber, and a discharge chamber coupled with the valve assembly on the inlet side of the compression chamber of the cylinder and connecting between the compression chamber and the discharge silencer therein. It is configured to include a head cover portion.

The mounting blade is integrally formed with a fastening boss for fastening the discharge silencer.

The discharge silencer is mounted to the mounting blade in parallel with the formation direction of the compression chamber.

The head cover portion includes a head plate in close contact with the valve assembly and a head cover forming a discharge chamber therein in cooperation with the head plate, wherein the head plate is formed to overlap only a part of the mounting blade.

The mounting vane is perforated with a discharge passage communicating with the discharge chamber of the head cover portion and the silencer of the discharge silencer.

The discharge passage is inclined toward the tip of the mounting blade from the compression chamber side.

According to the discharge silencer mounting structure of the hermetic compressor according to the present invention having such a configuration, the mounting state of the cylinder, which is separately manufactured and mounted on the frame, becomes precise and stable, and the size of the head cover portion can be relatively small, resulting in leakage and noise. The problem can be minimized.

Hereinafter, a preferred embodiment of the discharge silencer mounting structure of the hermetic compressor according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 6 is a perspective view showing a preferred embodiment of the discharge silencer mounting structure of the hermetic compressor according to the present invention, and FIG. 7 is an exploded cross-sectional view of the configuration of the present embodiment.

As shown in these figures, the compression chamber 52 is formed inside the cylinder 50 mounted on one side of the upper surface of the frame. The piston 53 is installed inside the compression chamber 52 to compress the working fluid.

On one side of the cylinder 50, that is, the inlet (side on which the valve assembly 58, which will be described below is mounted) of the compression chamber 52, the mounting wing to be perpendicular to the forming direction of the compression chamber 52 ( 54) is formed. The mounting blade 54 is formed in a substantially plate shape, the fastening boss 55 is provided in the center of the rear surface. The fastening boss 55 is provided with a fastening hole 56 having a female thread therein. On the other hand, the discharge passage 57 is formed in the mounting blade (54). The discharge passage 57 serves to communicate the discharge chamber 65 and the noise chamber 73 to be described below. The discharge passage 57 is formed to be inclined toward the mounting blade 54 on the compression chamber 52 side.

Fixing pieces 58 are formed on both sides of the lower end of the cylinder 50. The fixing piece 58 is installed in close contact with the surface of the frame, and the fastening holes 58 'for fastening to the frame are symmetrically drilled. The cylinder 50 having such a configuration can be manufactured in various ways. For example, it may be formed by casting as in the prior art, or may be formed through sheet metal work or press work.

The valve assembly 59 is mounted at the inlet of the compression chamber 52 of the cylinder 50. The valve assembly 59 selectively flows the working fluid passing through the suction silencer (not shown) into the compression chamber 52 and selectively discharges the compressed working fluid into the compression chamber 52. .

The head cover portion 60 is mounted to the cylinder 50 together with the valve assembly 59. The valve assembly 59 and the head cover portion 60 are mounted to the cylinder 50 at the same time by bolts. The head cover part 60 is largely comprised of a head plate 62 and a head cover 64. The head plate 62 and the head cover 64 cooperate with each other to form a discharge chamber 65 therein. The discharge chamber 65 communicates with the compression chamber 52 through discharge holes 66 formed in the head plate 62. The head plate 62 is provided with a communication hole 67 for transferring the working fluid discharged to the discharge chamber 65 to the noise chamber 73 to be described below. The communication hole 67 is also formed in the valve assembly 59, and is not given a reference numeral. Reference numeral 68 is a suction hole 68 for delivering the working fluid passed through the suction silencer to the compression chamber (52).

A discharge silencer 70 is mounted on the mounting blade 54 of the cylinder 50. The discharge silencer 70 serves to reduce noise and pulsation of the working fluid compressed and discharged from the compression chamber 52. The noise main body 72 forms an appearance of the discharge silencer 70, and the noise main body 72 is installed in parallel with the direction in which the compression chamber 52 is formed. The noise main body 72 is formed in a substantially cylindrical shape.

A noise chamber 73 is provided inside the noise main body 72. The silencer 73 communicates with the discharge chamber 65 through the discharge passage 57. For reference, a communication tube may be installed inside the noise chamber 73 to be connected to the discharge passage 57 to more effectively reduce discharge noise and pulsation.

A fastening hole 74 is formed at one end of the noise main body 72. The bolt 76 is inserted into the noise chamber 73 through the fastening hole 74 and fastened to the fastening hole 56 of the fastening boss 55. At this time, a gasket 77 is provided between the noise main body 72 and the mounting wing 54 to prevent leakage, and a washer 78 is disposed between the head of the bolt 76 and the noise main body 72. To prevent leakage. The discharge pipe 79 is installed to penetrate through the noise main body 72, and the discharge pipe 79 serves to discharge the working fluid of the noise chamber 73. The discharge pipe 79 transfers the working fluid to the outside of the sealed container.

On the other hand, the noise main body 72 constituting the discharge silencer 70 may be formed by sheet metal working or deep drawing.

Hereinafter, the operation of the discharge silencer mounting structure of the hermetic compressor according to the present invention having the configuration as described above will be described.

The cylinder 50 of the present invention is fixed to the frame by the fixing piece 58 is seated on the surface of the frame and the bolt is fastened to the frame through the fastening hole 58 '. A discharge silencer 70 is mounted on the mounting blade 54 of the cylinder 50.

The discharge silencer 70 is fastened to the rear surface of the mounting blade 54 by a bolt 76. That is, the noise main body 72 is positioned on the rear surface of the mounting blade 54 in parallel with the direction in which the compression chamber 52 is formed, and the bolt 76 passes through the fastening hole 74. 55).

On the other hand, the valve assembly 59 and the head cover portion 60 are mounted on the surface corresponding to the inlet of the compression chamber 52 of the cylinder 50 at the same time. At this time, the suction hole 68 is selectively communicated with the compression chamber 52 through the valve assembly (59). The discharge chamber 65 and the noise chamber 73 communicate with each other through the communication hole 57 of the head plate 62 and the communication hole of the valve assembly 59.

Here, the valve assembly 59 and the head cover part 60 do not extend to the mounting blade 54. This is because the discharge silencer 70 is mounted on the mounting blade 54 and passes through the mounting blade 54 so that the discharge passage 57 is inclined. Therefore, the head cover part 60 may be formed in a relatively small area.

In the above configuration, the working fluid delivered to the compression chamber 52 through the suction hole 68 is compressed and discharged to the discharge chamber 65 through the discharge hole 66. At this time, the flow of the working fluid into and out of the compression chamber 52 is controlled by the valve assembly 59.

The working fluid discharged to the discharge chamber 65 is transferred to the noise chamber 73 through the communication hole 67, and noise and pulsation are reduced to exit the outside of the sealed container through the discharge pipe 79.

In the discharge silencer mounting structure of the hermetic compressor according to the present invention as described above in detail, the discharge silencer is installed in a mounting wing formed to protrude on one side of the cylinder in parallel with the compression chamber forming direction of the cylinder.

Such a configuration can minimize the leakage of the working fluid in which the area in which the cylinder and the valve assembly and the head cover part contact each other is minimized, and the leak-related design can be made easier.

In addition, even when the cylinder is mounted on the frame, the fastening hole may be symmetrically formed on the fixing piece, so that the cylinder may be accurately and stably adhered to the surface of the frame so that noise or vibration does not occur during operation.

Claims (6)

A cylinder having a compression chamber formed therein and a mounting wing formed at one end thereof perpendicular to the direction in which the compression chamber is formed; A discharge silencer mounted on the mounting vane and configured to reduce pulsation and noise of the working fluid compressed in the compression chamber; And a head cover portion coupled to the compression chamber inlet side of the cylinder with the valve assembly and having a discharge chamber therein for connecting between the compression chamber and the discharge silencer. The structure of claim 1, wherein the mounting vane is integrally formed with a fastening boss for fastening the discharge silencer. The discharge silencer mounting structure according to claim 1, wherein the discharge silencer is mounted to the mounting wing in parallel with a direction in which the compression chamber is formed. According to any one of claims 1 to 3, wherein the head cover portion comprises a head plate in close contact with the valve assembly and a head cover to form a discharge chamber therein in cooperation with the head plate, the head plate is Discharge silencer mounting structure of the hermetic compressor characterized in that it is formed overlapping only a part of the mounting blade. The discharge silencer mounting structure according to claim 4, wherein the mounting vane has a discharge passage communicating with the discharge chamber of the head cover portion and the silencer of the discharge silencer. 6. The discharge silencer mounting structure for a hermetic compressor of claim 5, wherein the discharge passage is formed to be inclined toward the tip of the mounting blade from the compression chamber side.