JPS5960098A - Scroll compressor - Google Patents

Abstract

PURPOSE:To enable the effective sound deadening of the noise of compressed gas discharged out of a delivery port by a method wherein a delivery path is formed between a sound deadening cover provided at the outside of a shroud and the shroud while a sound deadening chamber, facing to the delivery path, is formed on the shroud. CONSTITUTION:The sound deadening cover 26 is mounted on the upper surface of the fixed shroud 21 and the inside thereof is utilized for a delivery chamber 27 while the delivery path 28 is formed between the cover and the shroud 21. The sound deadening chamber 29 is formed on the shroud 21 at the side facing to the delivery path 28. According to this method, the volume of compressed gas in the delivery chamber 27 is expanded suddenly when the gas is compressed and discharged into the delivery chamber 27 from the delivery port 24 upon the terminal period of a compression stroke and, whereby, the sound deadening effect may be obtained. Further, the gas discharged into the delivery chamber 27 is discharged to the outside through the delivery path 28, however, the gas is expanded again when it is passing through the sound deadening chamber 29 and the sound of the noise may be eliminated more effectively.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a scroll fist compressor, and in particular to a scroll that can effectively muffle the noise of compressed gas discharged from the discharge port of a fixed shroud that supports fixed scroll blades. Regarding the dispute compressor.

[Technical background and problems of the invention]

In general, a scroll compressor has a spiral-shaped fixed scroll blade engaged with a spiral-shaped orbiting scroll blade, and the gas sucked in from the suction port is transferred into a compression chamber formed between the fixed scroll blade and the orbiting scroll blade. The volume of the compression chamber is gradually reduced as the orbiting scroll blade rotates, and during this time the gas is compressed into high-pressure gas, and the gas is released into the discharge chamber from the discharge port provided near the center of the spiral of the fixed scroll blade. It is designed to discharge high pressure gas. Compressed gas at high temperature and high pressure is discharged into the discharge chamber, which generates noise, and in order to eliminate this noise, a muffler is usually provided in the middle of the discharge passage. Since it is difficult to completely muffle the sound with seven mufflers, a plurality of mufflers are usually combined. For this reason, the overall structure of the muffler has become large, which has been a major obstacle in making the compressor more compact.
□ [Object of the Invention] Therefore, the object of the present invention is to provide a scroll compressor that can effectively eliminate the noise generated by the high-temperature, high-pressure gas discharged from the scroll compressor with a compact configuration. be.

[Summary of the invention]

In order to achieve the above object, the present invention provides a spiral fixed scroll blade inside a fixed shroud, engages an orbiting scroll blade with the fixed scroll blade, and connects the orbiting scroll blade with the fixed scroll blade. A scroll compressor that uses the volume change of the compression chamber formed between both scroll blades to compress gas, and discharges the compressed gas from a discharge port opened approximately in the center of a fixed shroud. In the above, a sound deadening cover is attached to the outside of the fixed shroud, a discharge passage is formed between the sound deadening cover and the fixed shroud, and a sound deadening chamber opening facing the discharge passage is formed on the side of the fixed shroud. This is a characteristic feature.

[Embodiments of the invention]

Embodiments of a scroll compressor according to the present invention will be described below with reference to the drawings.

In FIG. 1, the symbol / indicates a closed casing;
A mounting frame λ is press-fitted into the inside of the casing. Inside this mounting frame, a housing chamber 3, a head receiving hole, and a left bearing hole are formed in stages.

Above bearing hole! A drive shaft t is rotatably fitted inside the drive shaft t, a shaft head at the upper end of the drive shaft t is loosely fitted into the head receiving hole q, and a lower end surface 7a of the shaft head is supported by a mounting frame. . The drive shaft 6 extends downward from the casing, and its lower end is immersed in lubricating oil g stored at the bottom of the casing.

Further, a rotor 9 constituting a drive motor is fixed on the axis of the drive shaft B, while a stator 10 is arranged concentrically on the outside of the rotor T, and the stator 10 is placed on the side of the casing. Retained.

On the other hand, the shaft head 7 is formed with an eccentric hole whose center is offset from the axis of the drive shaft B.

A driven shaft 13 of an orbiting scroll, indicated by the symbol /2 as a whole, is loosely fitted into this eccentric hole //, and a blade support disk /4' is integrally connected to the driven shaft /3. Furthermore, an orbiting scroll fi/s is integrally formed on the upper surface thereof. The above-mentioned orbiting scroll R/S has a rectangular cross section, and has a blade vent surface /, lt which is in a parallel relationship with a blade tip surface /ja.
b, /j-b. The lower surface of the wing support disk /4' is supported by an Oldham ring /AK, and the Oldham ring /A is a ring with a rectangular cross section, as is clear from FIG. Keyways and 7g that are perpendicular to each other are formed on both end faces. Of these, the key groove /g is a key located on the diameter line provided on the bottom surface of the storage chamber 3. The other key groove /g is fitted with a key (not shown) which is attached to the lower surface of the wing support disk /l and is perpendicular to the key 19. Therefore, the rotation of the drive shaft 6 causes the driven shaft 3 to perform a circular motion around the axis of the drive shaft B, but the orbiting scroll 12 is converted into an orbiting motion by the action of the Oldham ring B.

A fixed searoud 2/ is fixed above the mounting frame so as to sandwich the rotating shaft 4/co, and this shellaud 2/ has an annular suction chamber 2.2 on the inside and outside. , further has a fixed scroll blade n inside thereof, and a discharge port 2 is opened at the center of the spiral of the fixed scroll blade 3.

The fixed scroll blade 3 includes the orbiting scroll blade 15.
It is desirable that the wings be made to have the same shape and size, and that the height of the wings be precisely the same.

Incidentally, a suction pipe 5 passing through the casing 1 is connected to the two suction chambers.

According to the present invention, however, a sound deadening cover 2B is attached to the upper surface of the shroud 2/. This muffling cover 26 has a discharge chamber 27 on the inside, and a discharge passage 2g is formed in a part of the outside, and a muffling chamber UT is formed on the side facing the discharge passage 2g. The silencing chamber 29 is a rectangular cavity facing the discharge path H.

Since the present invention is configured in this way, the gas sucked into the suction chamber n from the suction pipe J is transferred to the λ formed between the orbiting scroll blade/blade 15 and the fixed scroll blade 23.
The volume of the compression chamber is gradually reduced as the orbiting scroll blade rotates to the left, and the gas is compressed and discharged from the discharge port to the discharge chamber core at the end of the compression process. At this time, the volume within the discharge chamber 27 rapidly increases (and expands) to produce a silencing effect, and the discharge gas discharged into the discharge chamber 27 is transferred to the discharge path λ
During this time, when passing through the silencing chamber λ, it expands again to achieve a silencing effect.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, a sound deadening cover is provided on the outside of the shroud, a discharge passage is formed between this cover and the sea loud, and a sound deadening chamber facing the discharge passage is formed in the shroud. The compressed gas discharged from the discharge port is rapidly expanded and muffled within the discharge chamber, and when passing through the discharge passage, the compressed gas is further muffled within the muffler chamber and is discharged with low noise. In addition, since the muffling chamber is formed within the fixed seal, it is convenient to make the compressor more compact without having to protrude a muffler to the outside.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing an embodiment of a scroll compressor according to the present invention, Fig. 2 is a perspective view showing an Oldham ring, and Fig. 3 is an enlarged sectional view showing the structure of a silencer. be. /S... Orbiting scroll blade 1.2/... Fixed shroud 1.23... Fixed scroll blade, J... Discharge boat, -7... Discharge chamber, 2g... Discharge path 1. 29・
...Mute room. Applicant's agent Kiyomi Inomata II4 Figure 2, item 3

Claims (1)

[Claims] A spiral fixed scroll blade is provided inside the fixed shroud, an orbiting scroll blade is engaged with the fixed scroll blade, and the orbiting scroll blade is driven to rotate with respect to the fixed scroll blade, so that there is a space between both scroll blades. A scroll compressor that compresses gas by utilizing changes in the volume of the compression chamber that is formed, and discharges the compressed gas from a discharge port that opens approximately in the center of a fixed shroud.
A sound deadening cover is mounted on the outside of the fixed shroud, and a discharge passage is formed between the sound deadening cover and the fixed shroud,
A scroll compressor characterized in that a silencing chamber that opens facing the discharge passage is formed on the side of the fixed shroud.