JP2012167584A - Hermetic compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hermetic compressor that can obtain an noise reduction effect at low cost without increasing man-hours for processing.SOLUTION: The hermetic compressor includes: a compressing mechanism 2 including two cylinders 5, 6, an intermediated partition plate 7 for partitioning the two cylinders 5, 6, two bearings 4, 8 for closing the opening of the two cylinders 5, 6 and two valve covers 9, 10, which are fitted into the bearings 4, 8, respectively; and a harmonic container for containing a motor 3. A communication hole 11 for communicating the two cylinders 5, 6, the intermediate partition plate 7 and the two bearings 4, 8, and for guiding a refrigerant gas ejected within a lower valve cover 10 into an upper valve cover 9 is arranged. A dimension of the communication hole 11 provided in a predetermined component is larger than that of the communication hole 11 provided in another component.

Description

  The present invention relates to a hermetic compressor used in refrigeration equipment such as an air conditioner and a refrigerator.

  A general rotary-type hermetic compressor has a structure in which a motor part and a compression mechanism part connected to the motor part are housed in a hermetic case, and is composed of a cylinder, an upper bearing, and a lower bearing. The refrigerant gas is compressed by and discharged into the sealed case. In recent years, a two-cylinder type rotary hermetic compressor having two sets of the above and below cylinders is being standardized.

  In such a two-cylinder compressor, refrigerant gas is discharged in two directions, the upper cylinder side and the lower cylinder side, so that the discharge sound of the refrigerant gas is larger than that of the one-cylinder type compressor. A bug sometimes occurred.

  Therefore, a technique has been proposed in which a Helmholtz silencer as shown in FIG. 6 is installed in an intermediate partition plate between the upper and lower cylinders to reduce noise (see, for example, Patent Document 1).

JP 2000-320479 A

  However, in the above-described conventional configuration, it is necessary to process holes and grooves having a small diameter in the intermediate partition plate, and there is a problem that the cost increases due to an increase in the number of processing steps.

  An object of the present invention is to solve the above-mentioned conventional problems, and when reducing the noise generated in the compression mechanism section, it can be processed by a simple method with less man-hours and can provide a reliable noise reduction effect. An object is to provide a compressor.

  In order to solve the above-described conventional problems, a hermetic compressor of the present invention includes two cylinders, an intermediate partition plate that partitions the two cylinders, two bearing portions that close the two cylinder opening ends, It consists of a sealed container that houses a compression mechanism portion having two valve covers each fitted to the bearing portion, and an electric motor portion, and the two cylinders, the intermediate partition plate, and the two bearing portions communicate with each other. In addition, a communication hole for introducing the refrigerant gas discharged into one of the valve covers into the other valve cover is provided, and the diameter of the communication hole provided in the predetermined part is a communication hole provided in the other part. It is larger than the diameter of the hole.

  According to the present invention, it is possible to provide a hermetic compressor capable of obtaining a noise reduction effect at low cost without increasing the number of processing steps.

Sectional view of hermetic compressor according to Embodiment 1 Sectional drawing which shows the principal part of the hermetic compressor which concerns on Embodiment 2. FIG. Sectional drawing which shows the principal part of the hermetic compressor which concerns on Embodiment 2. FIG. Sectional drawing which shows the principal part of the hermetic compressor which concerns on Embodiment 2. FIG. Sectional drawing which shows the principal part of the hermetic compressor which concerns on Embodiment 3. FIG. Cross section of a conventional hermetic compressor

  The hermetic compressor of the present invention includes two cylinders, an intermediate partition plate that partitions the two cylinders, two bearing portions that close the two cylinder opening ends, and 2 fitted to the bearing portions, respectively. It consists of a sealed container that houses a compression mechanism section with two valve covers and an electric motor section. The two cylinders, the intermediate partition plate, and the two bearing sections communicate with each other and are discharged into one of the valve covers. A communication hole for introducing the refrigerant gas into the other valve cover is provided, and the diameter of the communication hole provided in the predetermined part is larger than the diameter of the communication hole provided in the other part. Here, the predetermined part means any one part selected from a bearing portion, a cylinder, or an intermediate partition plate. Further, the other parts mean parts other than the predetermined parts among the bearing portion, the cylinder, or the intermediate partition plate. For example, when the predetermined part is a cylinder, the other parts are a bearing portion and an intermediate partition plate. Note that one of the two cylinders may be a predetermined part and the other cylinder may be included in another part. Thereby, an expansion type silencer can be comprised inside a communicating hole, and the noise reduction effect can be acquired.

  In one embodiment, in the hermetic compressor, the diameter of the communication hole provided in the intermediate partition plate is larger than the diameter of the communication hole provided in another part.

  In one embodiment, in the hermetic compressor, a diameter of a communication hole provided in one of the two cylinders is larger than a diameter of a communication hole provided in another component.

  In one embodiment, in the hermetic compressor, the diameter of the communication hole provided in the two cylinders is larger than the diameter of the communication hole provided in another part.

  Further, the hermetic compressor of the present invention comprises a hermetic container that houses one cylinder, a bearing unit, a compression mechanism unit including a valve cover fitted to the bearing unit, and an electric motor unit, A communication hole for communicating the one cylinder and the bearing portion is provided, and the diameter of the communication hole provided in the one cylinder is larger than the diameter of the communication hole provided in the bearing portion.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a cross-sectional view of a hermetic compressor in the present embodiment. The hermetic compressor accommodates a compression mechanism unit 2 and an electric motor unit 3 in a hermetic container 1.

  The compression mechanism unit 2 includes an upper bearing 4, an upper cylinder 5, a lower cylinder 6, an intermediate partition plate 7, and a lower bearing 8.

  The refrigerant gas compressed by the upper cylinder 5 is discharged from the upper bearing 4, passes through the upper valve cover 9 attached to the upper bearing 4, and is discharged into the sealed container 1.

  The refrigerant gas compressed by the lower cylinder 6 is discharged from the lower bearing 8. The refrigerant gas discharged from the lower bearing 8 is once guided into the lower valve cover 10 attached to the lower bearing 8. Thereafter, the lower bearing 8, the lower cylinder 6, the intermediate partition plate 7, the upper cylinder 5, and the upper bearing 4 are passed through a communication hole 11 and guided to the upper bearing 4 side. Is discharged into the sealed container 1.

  In the present embodiment, the diameter of the communication hole 11 installed in the intermediate partition plate 7 is larger than the diameter of the communication hole installed in the lower bearing 8, the lower cylinder 6, the upper cylinder 5, and the upper bearing 4. .

  With this configuration, an expansion silencer is configured along the flow path of the communication hole 11. In the expansion silencer having the above configuration, it is generally known that the silencing effect increases or decreases in accordance with the rate of change in the channel cross-sectional area. Therefore, it is preferable that the diameter of the hole provided in the intermediate partition plate 7 is sufficiently larger than the diameter of the holes provided in other parts.

(Embodiment 2)
The expansion silencer, that is, the diameter of the communication hole 11 need not be limited to the intermediate partition plate 7 alone.

  FIG. 2 is a cross-sectional view showing a main part of the hermetic compressor in the second embodiment. Thus, even if an expansion type silencer is installed in the upper cylinder 5, the same silencing effect can be obtained.

  Further, as shown in FIG. 3, an expansion silencer may be installed in the lower cylinder 6.

  Furthermore, as shown in FIG. 4, an expansion silencer may be installed in both the upper cylinder 5 and the lower cylinder 6.

(Embodiment 3)
It is not necessary to limit the two-cylinder type compressor to install the expansion silencer, that is, to provide the communication hole 11 with a large diameter.

  FIG. 5 is a cross-sectional view showing a main part of the hermetic compressor in the third embodiment. Thus, it is applicable also to the 1 cylinder type compressor which performs discharge by the lower bearing 8 side. Since the refrigerant gas discharged to the lower bearing 8 side is guided to the upper bearing 4 side through the communication hole 11, a similar silencing effect can be obtained if the diameter of the communication hole 11 of the cylinder 12 of one cylinder type is increased.

  According to the present invention, it is possible to reduce noise reliably and inexpensively with a simple structure. Therefore, the present invention can be applied to the use of refrigeration equipment such as an air conditioner and a refrigerator.

DESCRIPTION OF SYMBOLS 1 Airtight container 2 Compression mechanism part 3 Motor part 4 Upper bearing 5 Upper cylinder 6 Lower cylinder 7 Intermediate partition plate 8 Lower bearing 9 Upper valve cover 10 Lower valve cover 11 Communication hole 12 1 cylinder type cylinder

Claims (5)

A compression mechanism comprising two cylinders, an intermediate partition that partitions the two cylinders, two bearing portions that close the two cylinder open ends, and two valve covers that are respectively fitted to the bearing portions In a hermetic compressor composed of a hermetic container that houses a motor part and a motor part,
The two cylinders, the intermediate partition plate, and the two bearing portions communicate with each other, and a communication hole that guides the refrigerant gas discharged into one of the valve covers into the other valve cover is provided,
A hermetic compressor in which a diameter of the communication hole provided in a predetermined part is larger than a diameter of the communication hole provided in another part. 2. The hermetic compressor according to claim 1, wherein a diameter of the communication hole provided in the intermediate partition plate is larger than a diameter of the communication hole provided in another component. The hermetic compressor according to claim 1, wherein a diameter of the communication hole provided in one of the two cylinders is larger than a diameter of the communication hole provided in another component. 2. The hermetic compressor according to claim 1, wherein a diameter of the communication hole provided in the two cylinders is larger than a diameter of the communication hole provided in another component. In a hermetic compressor including a hermetic container that houses one cylinder, a bearing portion, a compression mechanism portion including a valve cover fitted to the bearing portion, and an electric motor portion,
A communication hole for communicating the one cylinder and the bearing portion;
A hermetic compressor in which a diameter of the communication hole provided in the one cylinder is larger than a diameter of the communication hole provided in the bearing portion.