JPH0267473A - Compressor - Google Patents

Abstract

PURPOSE:To aim at improvement in gas-liquid separation ability and reduction in noise by installing a deriving pipe integral structure part, having plural pieces of deriving pipes unified, in the inner part of a case of an accumulator, and setting up each suction port of these deriving pipes convergently in an almost axial center position in the case. CONSTITUTION:A case 16 of an accumulator 14 installed in a suction passage of a rotary compressor is made up of an upper cup 17 and a lower cup 18 in bottomed cylindrical form. A pair of pipe insert holes 20a, 20b are formed in a bottom part of the lower cup 18, from which each one end of deriving pipes 15a, 15b is inserted into the inside of the case 6. In this case, both these deriving pipes 15a, 15b are joined together at the extended end, forming an integral structure part 21. In addition, refrigerant suction ports 22a, 22b of these deriving pipes 15a, 15b are convergently set up in a almost axial center position in the case 16.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) This invention relates to an improvement in a compressor in which an accumulator is interposed in a suction passage.

(Prior Art) Generally, for example, a compressor for an air conditioner is provided with an accumulator for gas-liquid separation in a suction passage. An inlet pipe is fixed to the top of the case of this accumulator, and an outlet pipe extends into the case from the bottom of the case. Furthermore, a screen such as a wire mesh is disposed at the top inside the case of this accumulator. In this case, the refrigerant discharge port of the inlet pipe is arranged above the screen, and the refrigerant suction port of the outlet pipe is arranged below the screen.

The refrigerant led into the case of the accumulator from the refrigerant discharge port of the introduction pipe is separated into refrigerant liquid and refrigerant gas within this case, and the refrigerant gas is sucked into the refrigerant suction port of the output pipe. At the same time, the refrigerant liquid is stored in the inner bottom of the case. In addition, liquid return holes are formed at the bottom of the extensions of the lead-out pipes that extend into the inside of the case, and a portion of the refrigerant liquid stored in the inner bottom of the case flows through these liquid return holes. It is introduced into the lead-out vibe and returned to the compressor main body side via the lead-out pipe.

By the way, a compressor having a multi-cylinder configuration in which a plurality of cylinders are arranged in a compression mechanism section of a compressor main body is known. This type of compressor uses the so-called independent suction method, which aims to improve the suction efficiency (volume efficiency) into the compression chamber of each cylinder by sucking refrigerant gas separately from the accumulator for each compression chamber of each cylinder. There are some that have been adopted. In this case, by connecting one end of a plurality of lead-out pipes to a common accumulator, and connecting the other ends of these lead-out pipes to the suction ports of the compression chambers of each cylinder, It has been considered to have a configuration in which refrigerant gas is sucked in separately from the accumulator.

However, in the case of the above configuration, multiple lead-out pipes are introduced into the case of the accumulator, so the accumulator is There was a problem in that the refrigerant suction port of the outlet pipe could not be placed correctly at the axial center position within the case. In this case, a swirling flow of suction gas is formed inside the accumulator case by the cut-and-raised portion of the screen, and the refrigerant liquid tends to collect on the outer circumferential side of the case, so the refrigerant from the outlet pipe is placed at the center of the accumulator case. By arranging the suction port, it is possible to prevent refrigerant liquid from being sucked in from the refrigerant suction port of the outlet pipe.

Therefore, if the refrigerant suction port of each outlet pipe is placed at a position away from the axial center position in the case of the accumulator, such as when multiple outlet pipes are introduced into the accumulator case, each outlet pipe There was a risk that it would not be possible to prevent the refrigerant liquid from being sucked in from the refrigerant suction port. In addition, since the accumulator lead-out pipe extends relatively long from the bottom of the case to a position near the screen placed at the top of the case, the lead-out pipe inside the case may vibrate due to, for example, intake pulsation of refrigerant gas. , there was also the risk of causing noise generation.

(Problem to be Solved by the Invention) In the conventional structure, when a plurality of outlet pipes are introduced into the accumulator case, the refrigerant of each outlet pipe is located at a position away from the axial center position in the accumulator case. Since the suction ports are arranged, there is a risk that it will not be possible to prevent refrigerant liquid from being sucked in from the refrigerant suction ports of each outlet pipe, and the outlet pipes inside the case may vibrate due to intake pulsation of refrigerant gas, etc., which may cause noise. There was also a risk that this would occur.

This invention was made in consideration of the above circumstances, and it is possible to prevent the suction of refrigerant liquid from the refrigerant suction port of the outlet pipe of the accumulator, improve gas-liquid separation, and reduce noise. It is an object of the present invention to provide a compressor that can reduce the amount of water used.

[Structure of the Invention] (Means for Solving the Problems) This invention has a plurality of lead-out pipes whose one end is connected to the suction port of each cylinder in the compressor main body, and each other end of which is extended into the inside of the case of the accumulator. At the same time, a lead-out pipe-body structure unit that integrates multiple lead-out pipes is provided inside the accumulator case, and the suction ports of each lead-out pipe are centrally arranged at approximately the axial center position within the accumulator case. This is what I did.

(Function) By integrating the plurality of lead-out pipes in the accumulator case, each lead-out pipe can be adjusted by adjusting the period of vibration between each lead-out pipe in accordance with the phase shift of the intake pulsation of each cylinder on the compressor main body side. In addition to reducing noise by canceling out the vibrations between the This is intended to improve gas-liquid separation by preventing suction of refrigerant liquid from the refrigerant suction port.

(Example) Hereinafter, a first example of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 shows a schematic structure of an accumulator 14 interposed in a suction passage of a rotary compressor as shown in FIG. 2. As shown in FIG. In Figure 2,
1 is the main body of the rotary compressor. The compression mechanism section 2 of the rotary compressor main body 1 is provided with a pair of upper and lower cylinders 3a and 3b. Furthermore, 4 is a sealed case of the rotary compressor main body 1.

Inside this sealed case 4, an electric motor 5 is disposed on the upper side and a compression mechanism section 2 is disposed on the lower side.

Moreover, the electric motor 5 is formed by a stator 5a and a rotor 5b. Further, a rotating shaft 6 fitted to the rotor 5b is rotatably supported by an upper main bearing 7 and a lower sub-bearing 8. Further, a pair of upper and lower crank parts 9a and 9b are formed at the lower part of the rotating shaft 6.
The roller 1 in the upper cylinder 3a is attached to the upper crank part 9a.
Rollers 10b in the lower cylinder 3b are fitted into the crank portions 9b below 0a1, respectively.

Furthermore, a partition plate 1 is provided between the upper and lower cylinders 3a and 3b.
1 is interposed. Then, the main bearing 7, the partition plate 11
A first compression chamber 12a is formed between the auxiliary bearing 8, the partition plate 11 and the lower cylinder 3b.
A second compression chamber 12b is formed therebetween.

In addition, suction ports 13a and 13b are formed on each side wall surface of the upper cylinder 3a and the lower cylinder 3b, respectively. These suction ports 13a.

One end portions of lead-out pipes 15a and 15b of the accumulator 14 for gas-liquid separation are respectively connected to 13b.

On the other hand, the accumulator 14 has a configuration shown in FIG. In FIG. 1, 16 is the case of the accumulator 14. This case 16 is formed by an upper cup 17 and a lower cup 18 each having a cylindrical bottom. In this case, the lower open end 17a of the upper cup 17 is fitted into the upper open end 18a of the lower cup 18 and is integrally coupled. Further, inside this case 16, a screen 19 such as a wire mesh is disposed at the upper part.

Further, a pair of pipe insertion holes 20a and 20b are formed at the bottom of the lower cup 18 of the case 16. And these pipe insertion holes 20a.

The other ends of the vibrators 15a and 15b led out from the vibrator 20b are inserted into the case 16. In this case, the derived vibe 1
The upper ends of 5a and 15b extend to a position near the screen 19. At this extending end, both outlet pipes 1
5a and 15b are joined together by means such as welding to form an integral structure portion 21 of both lead-out vibes 15a and 15b. Further, the refrigerant suction ports 22a and 22b of both the lead-out vibes 15a and 15b are centrally arranged at approximately the axial center position within the case 16 of the accumulator 14.

Further, an introduction pipe 23 is fixed to the top of the upper cup 17 of the case 16. The refrigerant discharge port 24 of this introduction vibe 23 is arranged above the screen 20.

The refrigerant guided into the case 16 of the accumulator 14 from the refrigerant discharge port 24 of the introduction vibrator 23 is separated into refrigerant liquid and refrigerant gas within the case 16, and the refrigerant gas is transferred to the outlet vibrator 15a, The refrigerant liquid is sucked into the refrigerant suction ports 22a and 22b of the refrigerant 15b, and is also stored in the inner bottom of the case 16. Further, a lead-out vibe 15a extending inside the case 16,
A liquid return hole (not shown) is formed at the lower part of the extending portion of the case 15b, and a part of the refrigerant liquid stored in the inner bottom of the case 16 is led out from the liquid return hole to the vibrator 15a,
15b, and is returned to the rotary compressor main body 1 side via the lead-out vibes 15a and 15b.

Further, in the exposed parts 25a and 25b between the rotary compressor main body 1 and the accumulator 14 in the lead-out vibrators 15a and 15b, bent pipe parts 26a bent in a substantially arc shape are provided.
, 26b and a straight pipe section 27 extending along a substantially horizontal plane.
a and 27b are formed, respectively. And straight pipe part 27a.

The tip side of 27b is each suction port 13a of the upper cylinder 3a and lower cylinder 3b of the compressor main body 1.

13b. Furthermore, a pipe holding member 28 made of, for example, press-formed sheet metal material is attached to the curved pipe portions 26a, 26b of these lead-out pipes 15a, 15b. Inside the pipe holding member 28, there is a receiving part 29a having a shape corresponding to the curved pipe parts 26a, 26b of the lead-out vibrators 15a, 15b.

29b are formed, and these receiving portions 29a.

Bent pipe portion 26a of lead-out vibrator 15a, 15b in 29b,
26b is inserted, and the straight pipe part 27a.

The lead-out vibrators 15a and 15b are held in a state where the distance H between them 27b and the like are determined. Note that 30 is a discharge pipe attached to the upper end of the sealed case 4 of the rotary compressor main body 1.

Therefore, in the case of the above configuration, the accumulator 1
Since the integrated structure 21 is provided in which the plurality of lead-out vibrators 15a and 15b are integrated in the case 16 of 4, the intake pulsation of each cylinder 3a and 3b on the compressor main body 1 side is reduced during operation of the compressor main body 1. Each lead-out pipe 15-a according to the phase shift,
Due to the difference in the vibration period between 15b, each derived vibe 15
a.

The vibrations between the parts 15b can be mutually canceled out.

Therefore, noise can be reduced compared to the conventional method. Furthermore, the suction port 22 of each lead-out vibrator 15a, 15b
a, 22b are arranged centrally at approximately the axial center position within the case 16 of the accumulator 14, so that each lead-out vibrator 15
It is possible to prevent the refrigerant liquid from being sucked in from the suction ports 22a and 22b of the suction ports 22a and 15b, and it is possible to improve gas-liquid separation.

Further, FIGS. 3 and 4 show a second embodiment of the present invention. This is the lower cup 18 of the case 16.
Pipe insertion hole 20a at the bottom of.

20b are placed close to each other at approximately the center of the bottom of the lower cup 18, and the insertion portions 31a and 31b of each lead-out vibrator 15a and 15b inserted into the case 16 are placed approximately parallel to the axial direction of the case 16. Place and further case 1
Both lead-out vibes 15a and 15b are integrally held by a disk-shaped pipe holding plate 32 shown in FIG.
An integral structure portion 33 of both outlet pipes 15a and 15b is formed. In this case, a pair of pipe insertion holes 34a are provided approximately at the center of the pipe holding plate 32.

34b are formed, and a plurality of openings 35 for refrigerant circulation are formed around these vibrator insertion holes 34a, 34b. Therefore, in this case as well, the plurality of lead-out vibes 15a, 15b in the case 16 of the accumulator 14 can be integrated by the pipe holding plate 32, and each lead-out vibe 15a, 15
Since the suction ports 22a and 22b of the accumulator 14 can be centrally arranged approximately at the axial center position within the case 16 of the accumulator 14, the same effects as in the first embodiment can be obtained.

Note that the present invention is not limited to the above embodiments. For example, as in the third embodiment shown in FIGS. 5 and 6, a bifurcated outlet pipe connecting portion 41 is formed on the lower end side to connect the suction ports 22a, 22b of the pair of outlet vibrators 15a, 15b. and a common suction port 42 on the upper end side.
It is also possible to provide a connecting member 43 in which a connecting member 43 is formed, and to integrally hold both the leading-out vibrators 15a and 15b, thereby forming an integral structure portion 44 of both leading-out vibrators 15a and 15b. In this case, the connecting member 43 is disposed at a substantially axial position within the case 16 of the accumulator 14.

In addition, the pipe holding member 2 shown in the first embodiment
8 may have a structure in which a pair of structural members 51 and 52 are fixed by fixing screws 53 as shown in FIG. Furthermore, as shown in FIG. 8, the pipe holding member 28 may be formed of a spring material, and the pipe holding member 28 may be provided with claw portions 54 cut and raised on its inner surface.

Furthermore, it goes without saying that various other modifications can be made without departing from the gist of the invention.

[Effects of the Invention] According to the present invention, the other ends of each of the lead-out pipes connected to the suction ports of each cylinder in the compressor main body are extended into the inside of the case of the accumulator,
A lead-out pipe integrated structure unit that integrates multiple lead-out pipes is provided inside the accumulator case, and the suction ports of each lead-out pipe are centrally arranged approximately at the axial center position within the accumulator case. It is possible to prevent the refrigerant liquid from being sucked in from the refrigerant suction port of the outlet pipe, and it is possible to improve gas-liquid separation and to reduce noise.

[Brief explanation of the drawing]

1 and 2 show a first embodiment of the present invention, in which FIG. 1 is a vertical cross-sectional view showing a schematic configuration of the entire accumulator, and FIG. 2 is a vertical cross-sectional view showing a schematic configuration of the entire rotary compressor. 3 and 4 show a second embodiment of the present invention, in which FIG. 3 is a vertical sectional view of the main part, FIG. 4 is a perspective view showing the pipe holding plate, FIG. Fig. 6 shows a third embodiment of the present invention, Fig. 5 is a vertical sectional view of the main part, Fig. 6 is a perspective view showing the pipe connecting member, and Fig. 7 is a modification of the external pipe connecting member. Perspective view showing an example, No. 8
The figure is a perspective view showing yet another modification of the external pipe connecting member. 1...Rotary compressor main body (compressor main body), 2
...Compression mechanism section, 3a...Upper cylinder, 3b...
・Lower cylinder, 13a, 13b... Suction port, 14
... Accumulator, 15a, 15b... Outlet pipe, 16... Case, 21, 33.44... Integral structure part, 22a, 22b... Refrigerant suction port. Applicant's Representative Patent Attorney Takehiko Suzue Figure 2 Figure 4 Figure Figure Figure

Claims (1)

[Claims] In a compressor in which a compressor main body having a plurality of cylinders is provided in a compression mechanism section and an accumulator for gas-liquid separation is interposed in a suction passage of the compressor main body, one end side is inserted into the compressor main body. a plurality of lead-out pipes connected to the suction ports of each cylinder, the other ends of which extend into the case of the accumulator, and the plurality of lead-out pipes integrated into the case of the accumulator; A compressor characterized in that an integral structure is provided, and the suction ports of each of the lead-out pipes are centrally arranged approximately at an axial center position within the accumulator.