JPH03160167A - Closed type compressor - Google Patents

Abstract

PURPOSE:To contrive damping of noise by coating the external side of the first case, in which a drive part and a compressor mechanism part are housed at an interval, by means of the second case and interposing a porous part between both cases. CONSTITUTION:In a closed type compressor 11 used for a refrigerating cycle, a motor 17, serving as a drive part comprising a stator 15 and a rotor 16, and a compressor mechanism part 20, driven by this motor 17 and comprising a cylinder 19 and a roller 22 or the like, are housed in a case housing (first case) 14 formed in a cylindrical vessel shape. Here the second case 28 of almost hanging bell shape with one end side in the axial direction opened is concentrically arranged in the periphery of the first case 14. A foaming layer 35, formed of a foaming metal material or the like with which space between both the cases 14, 28 is foaming-charged, is provided. This foaming layer 35 is sealed in the space between both cases 14, 28 by a belt-shaped member 36 fitted to the opening edge part of the second case 28.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a sealed compressor in which, for example, a rotary compression mechanism, a motor for driving the compression mechanism, etc. are enclosed in a housing. Regarding type compressors.

(Prior art) Generally, as a rotary compressor, for example,
There are those described in Japanese Utility Model Publication No. 192692 and Japanese Utility Model Publication No. 58-48470. That is, the compressor described in Utility Model Application Publication No. 58-192692 is as follows:
As shown in FIGS. 4 and 5, the case housing 1
A motor 2, a compression mechanism section 3 driven by the motor 2, a muffler 4 covering the outside of the compression mechanism section 3, and the like are housed inside. In this compressor, a foamed metal 5 is provided in the muffler 4 to reduce noise.

Furthermore, as shown in FIG. 6, the compressor described in Japanese Utility Model Publication No. 58-48470 has a compressor main body 6 housing a compression mechanism and a motor surrounded by a sheet-like soundproofing material 7. , this soundproofing material 7 aims to reduce noise.

(Problem to be Solved by the Invention) By the way, in the compressor of the type shown in FIGS. 4 and 5, the muffler 4 is used to reduce the noise caused by the flow of the compressed gas discharged from the compression mechanism section 3. However, solid sound transmitted through each member of the compression mechanism section 3 (Ii
It is not possible to reduce the electromagnetic excitation noise generated in the motor 2, the vibration noise of the case housing 1 itself, etc.

Furthermore, the compressor of the type shown in FIG. 6 has a problem in that the noise reduction effect is halved if there is even a slight gap in the joints or openings of the soundproofing material. In addition, it has a low power effect on high frequency components of various noises, but low frequency components (
For example, the reduction effect is small for lkllz or lower).

An object of the present invention is to provide a hermetic compressor that has an excellent noise reduction effect.

[Structure of the Invention] (Means and Effects for Solving the Problems) In order to achieve the above object, the present invention provides a first part in which a drive part and a compression mechanism part driven by the drive part are enclosed in part (C). The first case housing includes a first case housing, a second case housing that covers the first case housing, and a porous material filled between the first case housing and the second case housing. The present invention includes a porous portion that connects the housing and the second case housing and is in thermal conductive contact with the first case housing and the second case housing.

By doing this, the present invention absorbs and insulates noise transmitted to the first case housing by the porous portion,
The purpose is to improve the noise reduction effect.

(Example) Hereinafter, each example of the present invention will be described based on FIGS. 1 to 3.

1 and 2 show a first failed embodiment of the present invention. What is indicated by 11 in FIG. 1 is a rotary compressor (hereinafter referred to as a compressor) as a hermetic compressor used, for example, in a refrigeration cycle. This compressor 11 includes a first case housing (12) consisting of a case body l2 formed into a cylindrical container shape and a lid member 13 airtightly fixed to this case body 12.
The compressor 11 further includes a stator 15 fixed to the inner circumferential surface of the first case 14, and a stator 15 fixed to the inner circumferential surface of the first case 14. It has a motor 17 as a drive unit, which is composed of a rotor 16 and a rotor 16 inserted concentrically inside the motor 15. The compressor 11 also includes a crankshaft 18, a cylinder 19, etc. in a first case 14, and a first
It has a compression mechanism section 20 fixed to a case 14 of.

Then, the compressor 11 uses the motor 17 to cause the crankshaft 18 extending from the stator 16 to rotate simultaneously, and eccentrically rotates the crank part 21 of the crankshaft 18 and the roller 22 fitted onto the crank part 21 in the cylinder 19. . As the crankshaft 18 rotates, the compressor 11 supplies refrigerant gas to the cylinder through a suction pipe 23 connected to the compression mechanism section 20 at one end and led out to the outside of the first case 14 at the other end. It is designed to be inhaled within 19 minutes.

Further, the compressor 11 compresses the refrigerant gas in the cylinder 19 and transfers the high pressure refrigerant gas to the cylinder 19.
It is once discharged from the inside space of the first case 14. Then, the refrigerant gas discharged into the first case 14 is discharged and pressure-fed to the outside of the first case 14 via the discharge pipe 24 inserted into the lid member 13, and the refrigerant gas is used as a refrigerant in the refrigeration cycle. Return to management.

Here, what is indicated by 25 in FIG. 1 is the first case 14.
This is a stud pin that is provided to protrude outward from the casing l4 and is located substantially on the axis of the first case l4.

Further, 26 is an oil cooler pipe introduced into the first case 14, and 27 is a terminal portion fixed to the lid member 13.

Moreover, what is shown at 28 in FIG. 1 is a second case housing (hereinafter referred to as the second case). The second case 28 is approximately bell-shaped with one axial end open, and the first case 14 is inserted concentrically into the second case 28 . The second case 28 covers the first case 14 from the outside, and its inner wall surface faces the outer wall surface of the first case 14.

Further, the second case 28 exposes the end of the first case 14 on the side where the lid member 13 is located to the outside. Further, the second case 28 allows the suction pipe 23, the stat bin 25, the oil cooler pipe 26, etc. that protrude from the first case 14 to pass through its bottom 29 and lead them out to the outside.

Then, the second case 28 has the above-mentioned members 2 on the bottom part 29.
Each through hole 30, 31, 32 through which the holes 3, 25, 26 pass through.
have. The second case 28 has the proximal end portion of the stat bin 25 fixedly connected to the bottom portion 29 by welding, and the suction pipe 23 and the oil cooler pipe 26 are fitted into the peripheral edges of the respective through holes 30 and 32. It is supported by ring-shaped members 33 and 34 that are joined together. and,
The second case 28 has each of the through holes 30, 31, and 32 hermetically sealed.

Further, 35 in the figure indicates a foam layer as a porous portion. The foam layer 35 is made of a foamed metal material or the like that is foamed and filled in the space between the first case 14 and the second case 28, and has high heat conductivity. and,
This foam layer 35 is formed between the opening edge of the second case 28 and the first
The space between the cases 14 and 28 is enclosed by a band-shaped member 36 inserted between the case and the outer peripheral surface of the case.

Further, the foam layer 35 is in thermal conductive contact with most of the outer circumferential surface of the first case 14 and substantially the entire inner circumferential surface of the second case 28, and fixedly connects both cases 14 and 28. It is integrated. Further, the foam layer 35 is in contact with portions located between the case 14 and the second case 28 of the TS1, such as the suction pipe 23, the stud pin 25, and the oil cooler pipe 26.

In other words, when the compressor 11 starts operating and rotates the crankshaft 18 concavely, the first
Various noises generated in the first case 14 and transmitted to the first case 14, such as electromagnetic noise caused by running current flowing through the motor 17, mechanical noise of the compression mechanism 20, and flow noise of the refrigerant gas, are First, it is transmitted from the first case 14 to the foam layer 35 and diffused by the foam layer 35. Then, the compressor 11 disperses the direction and sound energy of the radiated sound from the first case using the numerous micro spaces and the matrix within the foam layer 35, thereby attenuating the radiated sound.

Then, the radiated sound that has once attenuated within the foam layer 35 and reached the outer part of the foam layer 35 is reflected by the inner peripheral surface of the second case and returned to the foam layer 35 again. This largely eliminates most of the noise generated inside the case and transmitted to the outside.

That is, the above-mentioned compressor 11 absorbs and insulates the noise generated in the first case by the foam layer 35,
The above-mentioned noise can be prevented from becoming solid-borne sound and being transmitted to the second case 28, and the noise flowing outside the second case 28 can be significantly reduced.

Furthermore, since the compressor 11 has a foam layer 35 enclosed between the first case 14 and the second case 28, generation of standing resonance between the two cases 14 and 28 can be prevented. Can be done.

Here, FIG. 2 compares the noise characteristics of the above-mentioned compressor 11 and the noise characteristics of a conventional compressor. The solid line 37 in the figure shows the noise characteristics of the above-mentioned compressor 11, and the dashed line 38 shows the noise characteristics of the above-mentioned compressor 11. It shows the noise characteristics of a conventional compressor. The horizontal axis of the graph in FIG. 2 shows the noise frequency (Hz), and the vertical axis shows the mechanical impedance (dB).

In addition, since the compressor 11 has a foam layer 35 interposed between the first case 14 and the second case 28, the heat generated inside the first case 14, that is, the high temperature discharge gas component and the motor heat generation component. Foam layer 35 with excellent heat conductivity etc.
The heat can be transmitted to the second case 28 via the heat source, and the heat can be efficiently radiated from the second case 28 to the outside air. Therefore, the compressor 11 can prevent the temperature of the motor 17 and the compression mechanism section 20 from rising excessively.

FIG. 3 shows a second embodiment of the invention. That is, in this compressor 41, the outside of the axially intermediate portion of the first case 14 is covered with a cylindrical second case 42 whose fleshy end is open. A foam layer 42 as a porous portion made of a foam metal material or the like is formed between the first case 14 and the second case 41. The combustor 41 has both axial ends of the first case 14 exposed to the outside from the second case 41, and both cases 1
4 and 41 are fixedly connected only by the foamed RiI 42.

[Effects of the Invention] As explained above, the present invention includes a first case housing in which a drive section and a compression mechanism section driven by the drive section are enclosed, and a first case housing that covers the first case housing. The first case housing is made of a porous material filled between the first case housing and the second case housing, and the first case housing and the second case housing are connected to each other. The second case housing includes a porous portion that is in thermal conductive contact with the second case housing.

Therefore, the present invention has the effect that the noise transmitted to the first case housing can be absorbed and insulated by the porous portion, and the effect of reducing deceptive noise can be improved.

[Brief explanation of the drawing]

Figures 1 and 2 show a first embodiment of the present invention, with Figure 1 being a cross-sectional view, Figure 2 being a graph comparing the noise characteristics with those of a conventional one, and Figure 3 is the second aspect of the present invention
Figures 4 to 6 show conventional examples, Figure 4 is a cross-sectional view of the muffler H type, and Figure 5 is r'lA in Figure 4. Enlarged view of the enclosed area,
FIG. 6 is a perspective view of a type having soundproofing material. 11...Rotary compressor (hermetic compressor), 1
4...First case housing, 17...Motor (
20... Compression mechanism part, 28... Second case housing, 35... Foam layer (porous part).

Claims (1)

[Claims] a first case housing that encloses a drive section and a compression mechanism section driven by the drive section; a second case housing that covers the first case housing; the first case housing and the above case housing; a porous body filled between the first case housing and the second case housing, the first case housing and the second case housing being connected to each other; A hermetic compressor equipped with a porous part that is in thermal conductive contact with the air compressor.