JPH03107594A - Silencer of compressor - Google Patents

Abstract

PURPOSE:To attenuate pressure pulsation of a refrigerant by partitioning the inside of a tail pipe extending to a high pressure chamber in a closed container with a bulkhead, and by providing a hole communicating to the high pressure chamber between the bulkhead and the closed container, so as to form a side branch type resonance muffler. CONSTITUTION:At the time of the operation of a scrawl compression element 2 in a closed container 1, compressed refrigerant is discharged form a discharge hole 14 of a mirror plate 11 in a fixed scrawl 7 to the inside of a high pressure chamber 9. The refrigerant is introduced from a communicating hole 28 of a tail pipe 24 to a space 26, and is discharged from a discharge pipe 23 to the outside of the closed container 1. The inside of the tail pipe 24 is partitioned by a bulkhead 25, divided into the space 26 communicating to the discharge pipe 23, and into a space 27 opening to the high pressure chamber 9. A part of each space 26, 27 is used as a side branch type resonance muffler. Of the pressure pulsation component of the refrigerant discharged from the high pressure chamber 9 to the discharge pipe 23, the component oscillating the discharge pipe 23 is attenuated, whereby the oscillation of the discharge pipe 23 through the refrigerant is eliminated.

Description

[Detailed description of the invention] (b) Industrial application field This invention relates to an improvement in a noise reduction device for a compressor.

(B) Prior art Conventional compressors use a muffler installed in the compression element to muffle the noise generated by the pressure pulsations of the refrigerant compressed by the compression element in the hermetic container. It is discharged to the outside from the discharge pipe through the
(See Publication No. 0).

(C) Problems to be Solved by the Invention However, conventional compressors discharge the refrigerant directly before being discharged from the discharge pipe to the outside through the airtight container without silencing the sound, so the muffler itself is unable to silo the refrigerant. If the muffler is insufficient or there is noise due to the muffler installation, that is, pressure pulsations due to resonance noise generated within the muffler, there is a problem in that the noise is directly transmitted to the outside through the discharge pipe.

The present invention solves the above-mentioned problem, and aims to provide a silencer for a compressor that is capable of attenuating the pressure pulsations of refrigerant discharged from the inside of a closed container to the outside through a discharge pipe, using the discharge pipe itself. This is the purpose.

(D) Means for Solving the Problems This invention has a closed container and a compression element housed in the container, and the refrigerant compressed by the compression element is passed through a high pressure chamber in the closed container. In a compressor that discharges from a discharge pipe attached to this container, the discharge pipe is provided with a tail pipe extending into a high pressure chamber in a closed container, the inside of this tail pipe is divided by a partition wall, and the partition wall and the closed container are A communication hole is provided in the tail pipe between the two and the high pressure chamber.

(e) Effect By having the above-described structure, this invention provides a partition wall in the tail pipe of the discharge pipe extending into the high pressure chamber in the closed container, and a plurality of side branch type resonance mufflers are installed inside the partition wall using the partition wall. The pressure pulsation component of the refrigerant discharged to the outside from the high-pressure chamber in the closed container is attenuated in the tail pipe to prevent noise from being generated outside.

Example) The present invention will be explained below based on the example shown in FIGS. 1 and 2.

Reference numeral 1 denotes a closed container, in which a scroll compressor section 2 is housed on the upper side, and an electric motor section 3 for driving the compressor section is housed on the lower side. Reference numeral 4 denotes a frame, and this frame is provided with a bearing portion 6 for pivotally supporting a rotating shaft 5 at the center thereof. The scroll compressor section 2 is composed of a fixed scroll 7 and an oscillating scroll 8. The fixed scroll 7 is in pressure contact with the inner wall of the closed container 1, and the inside of this container is divided into a high pressure chamber 9 and a low pressure chamber 1.
0, an annular wall 12 projecting from the periphery of one side of the mirror plate, and an involute-shaped or similar curved line surrounded by the annular wall and erected on the mirror plate 11. It is composed of a spiral wrap 13 consisting of. The end plate 11 of the fixed scroll 7 is provided with a discharge hole 14 communicating with the high pressure chamber 9 inside the closed container 1. The fixed scroll 7 has the annular wall 12 and the wrap 13 projecting downward. The oscillating scroll 8 includes a disk-shaped end plate 15, a spiral wrap 16 formed of an involute shape or a curved line approximating the involute, which is provided upright on one side of the end plate, and a spiral wrap 16 in the center of the other side of the end plate 15. It is composed of a protruding pin portion 17. The oscillating scroll 8 is configured such that the projecting direction of the wrap 16 is upward, and the wrap faces and engages with the wrap 13 of the fixed scroll 7 to form a plurality of compression spaces 18 inside. Reference numeral 19 denotes a boss hole provided at the tip of the rotating shaft 5 into which the pin portion 17 of the swinging scroll 8 is inserted, and the center of this boss hole is provided eccentrically from the axis of the rotating shaft 5. 2
0 is an Oldham joint that revolves the oscillating scroll 8 on a circular orbit relative to the fixed scroll 7 without rotating. A suction passage 21 for guiding refrigerant to the scroll compressor section 2 is provided on the outer periphery of the frame 4 . 22 is airtight container 1
This suction pipe is connected to a low pressure chamber 10 in the closed container 1 below the motor section 3.

Reference numeral 23 denotes a discharge pipe attached to the earthen wall of the closed container 1, and this discharge pipe communicates with the high pressure chamber 9 inside the closed container 1. The discharge pipe 23 is provided with a tail pipe 24 extending to the high pressure chamber 9 inside the closed container 1. The inside of this tail pipe is divided by a partition wall 25 so that one space 26 communicates with the discharge pipe 23 and the other space 27 communicates with the high pressure chamber 9. Reference numeral 28 denotes a communication hole provided in the tail pipe 24, and this communication hole is provided between the partition wall 25 and the closed container 1, and communicates the space 26 with the high pressure chamber 9.

In the scroll compressor configured in this manner, when the electric motor section 3 is rotated, its rotational force is transmitted to the oscillating scroll 8 via the rotating shaft 5.

That is, the oscillating scroll 8 has a pin portion 1 inserted into the boss hole 19 of the rotating shaft 5 eccentrically with respect to the axis of the rotating shaft.
7, and is caused to revolve on a circular orbit with respect to the fixed scroll 7 at an Oldham joint 20 so as not to rotate. The fixed scroll 7 and the swinging scroll 8 reduce the compression space 18 formed by these scrolls from the outside to the inside, and the air flows into the low pressure chamber 10 in the closed container 1 from the suction pipe 22. The refrigerant that passes through the electric motor section 3 and flows through the suction passage 21 on the outer periphery of the frame 4 is compressed. This compressed refrigerant is discharged into the high pressure chamber 9 from the discharge hole 14 of the end plate 11 of the fixed scroll, enters the space 26 from the communication hole 28 of the tail pipe 24, and is discharged from the discharge pipe 23 to the outside of the closed container 1.

The tail pipe 24 extending into the high pressure chamber 9 in the closed container 1 is partitioned by a partition wall 25 into a space 26 communicating with the discharge pipe 23 and a space 27 opening into the high pressure chamber 9.
A part of the space 26 is used as a side branch type resonance muffler to attenuate the frequency of vibration of the discharge pipe 23 in the pressure pulsation component of the refrigerant discharged from the high pressure chamber 9 to the discharge pipe 23. The refrigerant is used to prevent vibration. Moreover, the spaces 26, 27 of the tail tube 24 are located at a distance L1.27 from the opening. By varying Lx, the frequency of the pressure pulsation component that can be attenuated can be increased. That is,
The refrigerant discharged from the discharge hole 14 into the high pressure chamber 9 first has its pressure pulsations at a specific frequency attenuated in the space 27 of the tail pipe 24, and then the refrigerant flowing into the space 26 from the communication hole 28 of the tail pipe 23 is damped. Within this space, pressure pulsations of different frequencies are attenuated and the fluid is discharged from the discharge pipe 23 to the outside of the closed container 1.

By providing the communication hole 28 of the tail pipe 24 at the lower end, when the oil contained in the refrigerant that has flowed into the space 26 from the high pressure chamber 9 is separated in this space, it is made easier to return to the high pressure chamber 9. ing.

This invention provides a side branch type resonant muffler in the tail pipe 24 of the discharge 7 tail pipe 23 extending into the high pressure chamber 9 in the closed container 1, so that the The pressure pulsations of the refrigerant can be attenuated, and the discharge pipe can be prevented from vibrating due to the pressure pulsations of the refrigerant.

(G) Effects of the Invention According to the present invention, the interior of the tail pipe extending to the high pressure chamber in the closed container is divided by a partition wall, and the space between the partition wall and the closed container is connected to the high pressure chamber. Since a side branch type resonant muffler is formed by providing communication holes that communicate with each other, the pressure pulsations of the refrigerant discharged into the high pressure chamber can be attenuated by the tail pipe, and the refrigerant discharged from the high pressure chamber into the discharge pipe can be damped. This can prevent the discharge pipe from vibrating.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of a scroll compressor showing an embodiment of the present invention, and FIG. 2 is an enlarged cross-sectional view of a main part showing a state in which a discharge pipe is attached to a closed container. 1... Airtight container, 2... Scroll compression element,
-8= 9...High pressure chamber, 23...Discharge pipe, 24...Tail pipe, 5...Partition wall, 26.27...Space, 28...Communicating water.

Claims (1)

[Claims] 1. A compressor that has a closed container and a compression element housed in the container, and the refrigerant compressed by the compression element is discharged from a discharge pipe attached to the container through a high pressure chamber in the closed container. In the machine, the discharge pipe is provided with a tail pipe extending into a high pressure chamber in a sealed container, the inside of this tail pipe is divided by a partition wall, and a high pressure chamber is provided in the tail pipe between the partition wall and the sealed container. A silencer for a compressor, characterized by having a communication hole communicating with the compressor.