JPH0370882A - Closed type compressor - Google Patents

Abstract

PURPOSE:To reduce generation of vibration and noise from supporting legs and obtain a low noise closed type compressor by providing metal rings fitted and fixed to a closed vessel, and providing supporting legs fixed to the rings and holding a closed type compressor on an unit base. CONSTITUTION:Metal rings 10, 10 fitted and fixed on the outer circumferential faces of the compressor element 3 side and the motor element 2 side of a closed vessel 1, by shrinkage fit, welding, threadly fix, or the like, are formed into thickness of 1.5-3 times of that of the closed vessel 1 to obtain sufficient rigidity for assembly and necessity, independent of the fixing method. Further, supporting legs 5, 6 are respectively fixed on the metal rings 10, 10 fitted to the closed vessel 1 by welding, threadly fit, or the like. By this constitution rigidity of the fitting part of the supporting legs 5, 6 is increased, compared with the case of the closed vessel 1 only. Hereby, vibration generated from the compressor element 3 at operation is transmitted to the closed vessel 1, but herefrom transmission to the supporting legs is restrained, and generation of vibration and high frequency noise due to resonance of the supporting legs 5, 6 can be reduced.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a hermetic compressor in which vibration and noise from support legs are reduced.

[Conventional technology]

FIG. 3 is a front view showing a conventional rotary closed type pressure m machine disclosed in, for example, Japanese Unexamined Patent Publication No. 62-173582. In Fig. 1, 1 is a hermetic container forming the outer shell of the hermetic compressor, 2 is an electric element that supplies the driving force, 3 is a compression element that compresses the refrigerant to be compressed, and 4 is the compressor that compresses the driving force from the electric element 2. It is a crankshaft that transmits power to the element 2, and the electric element 2 and the compression element 3 are provided in the closed container 1. Further, support legs 5 and 6 are fixed to the outer peripheral surface of the sealed container 1 by welding or bolting, and the support legs 5 and 6 are attached to the mount l-7,
8 and is held and fixed to a unit base 9 of equipment such as a refrigeration device or an air conditioner. In the hermetic compressor configured as described above, the crankshaft 4 is driven by the electric element 2, and the compression element 3 compresses the refrigerant gas from the stroke of sucking it into the hermetic container. A series of steps sequentially transitioning to a step of discharging inward is continuously repeated.

[Problem to be solved by the invention]

The conventional hermetic compressor is constructed as described above, and the plurality of supports 115 and 6 are formed by pressing plate materials, etc., and are directly fixed to the outer peripheral surface of the hermetic container 1 by bolting or welding. Each of the support legs 5.6 is made of a single plate material, and since the support legs 5.6 exhibit sharp vibration characteristics specific to high frequencies, the compression elements are joined to the glIi enclosure #11 by welding or the like. 3 propagates to the closed container 1, and from the closed container 1 to the support 11gl5.
6, and these support legs 5 and 6 have a frequency that indicates a unique resonance frequency (mainly a high frequency band of 5Z to 7KHz).
There was a problem in that it caused resonance and generated large high-frequency noise. This invention was made to solve the above-mentioned problems, and by suppressing vibrations to the support legs and reducing vibration and noise generation from the support legs, a low-noise closed type pressure M The purpose is to take advantage of the opportunity.

[Means to solve the problem]

A hermetic compressor according to the present invention includes a metal ring that is fitted and fixed to the outer peripheral surface of a hermetic container, and support legs that are fixed to the metal ring and hold the hermetic compressor on a unit base. It is something.

[Function] In the hermetic compressor of the present invention, the support legs are not directly fixed to the hermetic container, but are attached to metal rings that are fitted and fixed to the outer peripheral surface of the hermetic container by shrink fitting, welding, screwing, etc. As a result, the rigidity of the mounting portion can be increased to a level greater than that of a closed container alone, vibration to the support legs can be suppressed, and generation of vibrations and high-frequency noise due to resonance of the support legs can be reduced.

【Example】

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a rotary hermetic compressor according to an embodiment. In FIG. 1, numerals 1 to 9 are the same or equivalent parts as in the conventional hermetic compressor shown in FIG.
Reference numeral 10 denotes a ring made of metal, such as steel, which is fitted and fixed to the outer circumferential surface of the compression element 3 side and the electric element 2 side of the closed container 1 by shrink fitting, welding, screwing, or the like. When the metal ring 10°10 is shrink-fitted, the inner diameter is the same as that of the sealed container 1.
Regardless of the fixing method, the thickness of the metal ring 10.10 should be approximately 1.5 to 3 times the thickness of the sealed container 1 to ensure ease of assembly and sufficient rigidity as required. be. Furthermore, the support legs 5 and 6 are fixed to the metal rings 10 and 10 attached to the closed container 1 by welding, screwing, etc., respectively. The rotary hermetic compressor according to this embodiment is constructed as described above, and the rigidity of the mounting portions of the support legs 5 and 6 is the same as that of the hermetic container 1.
This has increased compared to the case where only For this reason, vibrations generated from the compression element 3 during operation of the hermetic compressor are propagated to the hermetic container 1, and the support i! $
5 and 6, and the generation of vibration and high frequency noise due to the resonance of the support 1115°6 can be reduced. In the above embodiment, the support leg 5 on the compression element 3 side and the support leg 6 on the electric element 2 side are both fixed to the metal ring 10.10 that is fitted and fixed in the sealed chamber N1 by shrink fitting or the like. However, in this invention, the compression element 3 side and the electric element 2 side
The metal ring 10 may be used only on either side. Next, other embodiments of the invention will be described. In the above embodiment, the metal rings 10, 10 are attached to the airtight container 1.
We have explained that the support legs 5 and 6 are attached to the metal ring 10° 10 after fitting and fixing them.
In another embodiment, as shown in FIG. 2, support legs 5 (or 6) are attached in advance to a metal ring 10 made of steel or the like to constitute a metal ring 11 with support legs. The metal ring 11 with support legs is then shrink-fitted into the closed container and fixed by welding, screwing, or the like. In this other embodiment, transmission of vibrations from the closed container to the support legs can be reduced in the same manner as in the embodiment shown in FIG. 1, and vibrations and high-frequency noise from the support legs can also be reduced.

【Effect of the invention】

As explained above, according to the present invention, the supporting legs are provided on the metal ring that is fitted and fixed to the outer peripheral surface of the closed container.
The rigidity of the mounting part of the support leg can be increased by the metal ring, and the vibration generated from the compression element during operation of the compressor can be suppressed from propagating to the support leg via the sealed container. It is possible to reduce vibrations caused by resonance and high-frequency noise, and therefore, there is an effect that a hermetic compressor with low noise can be obtained.

[Brief explanation of drawings]

FIG. 1 is a front view showing a hermetic compressor according to one embodiment of the present invention, FIG. 2 is a front view showing a metal ring with supporting legs used in another embodiment of the invention, and FIG. 3 is a conventional FIG. 2 is a front view showing a hermetic compressor. 1-Airtight container, 2-Electric element, 3-Compression element, 5.6-
...Support legs! -・Unit pace, 10・Metal ring, 11・Metal ring with support legs. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] In a hermetic compressor in which an electric element and a compression element are provided in a hermetic container, a metal ring is fitted and fixed to the outer peripheral surface of the hermetic container, and the hermetic compressor is fixed to the metal ring and the hermetic compressor is mounted on a unit base. A hermetic compressor characterized by comprising support legs for holding the compressor.