JP2010127191A - Hermetic type compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hermetic type compressor being capable of reducing machine vibration of the internal mechanism of the compressor generated during the operation thereof, and controlling the vibration transmission to the outside of the compressor. <P>SOLUTION: The hermetic type compressor has a structure in which the internal mechanism comprising the electric operation element 2 and the compression element 3 is supported by the elastic supporting member 4 in the hermetic container 1, and there is a storage space of the compressor oil 5 below the hermetic container 1, wherein a site having a plane part is provided to one part and the like of the elastic supporting member 4 in the compressor oil 5, and this plane part is parallel to the oil surface, so that when the internal mechanism of the compressor is vibrated in the vertical direction, the plane part which receives the vibration of the same phase meets the viscosity resistance from the compressor oil, thereby damping the vibration. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a technique for reducing vibration generated during operation of a compressor.

  Recent hermetic compressors are required to have low vibration noise. The demand level is becoming stricter year by year, and the importance of technology that can meet the need for low vibration is increasing.

  Patent Document 1 is known as an example of a conventional vibration reduction technique for a hermetic compressor. As shown in FIG. 9, a suspension spring 12 for supporting the internal mechanism of the compressor is provided between the support stay 13 and a support spring 14 is also provided between the support stay 13 and the sealed container 1 to provide double vibration isolation. By adopting the structure, the effect of reducing the vibration caused by the compressor operation is enhanced.

JP-A-5-010261

  However, since the vibration-proof structure as described above does not have a structure that attenuates the vibration of the elastic support member, the vibration generated in the compression process (especially in the case of the reciprocating type) is transmitted to the sealed container of the compressor without being attenuated. Easy to do. Accordingly, the vibration is transmitted to the casing of the apparatus in which the compressor is installed through the compressor legs, that is, to the outside of the compressor. In particular, the refrigerator operates continuously without day and night. As a result, it may cause a failure of a precision component such as an electronic component in the apparatus or a noise problem such as a rattling noise.

  Thus, in the case where the vibration is transmitted to the outside of the compressor, the natural frequency of the parts outside the compressor is different, and it is difficult to predict the occurrence of the problem in advance. However, after-the-fact measures often result in increased costs, such as adding vibration and sound insulation members later. In order to prevent the occurrence of such a problem caused by vibration transmission to the outside of the compressor, it is important to sufficiently attenuate the vibration before the vibration is transmitted to the outside of the compressor.

  An object of the present invention is to attenuate the vibration generated inside the compressor by the operation of the compressor inside the sealed container, and to reduce various problems caused by the vibration transmitted to the outside.

  The object of the present invention is achieved by providing a hydraulic damper between the compressor internal mechanism and the sealed container.

  According to the present invention, transmission of vibration to the outside of the compressor is suppressed.

  Examples will be described below.

  FIG. 1 is a side sectional view showing a first example of an embodiment of a hermetic compressor for a refrigerator. A compressor internal mechanism including an electric element 2 and a compression element 3 is accommodated in the sealed container 1, and the compressor internal mechanism is elastically supported in the sealed container 1 by a leaf spring 4. The compression element 3 is a reciprocating type.

  In addition, compressor oil 5 used for lubrication of sliding parts such as shafts and pistons included in the compressor internal mechanism is stored in the lower part of the hermetic container 1, and the electric element rotates during operation of the compressor. It is guided to the part that needs lubrication using force. After that, it communicates with the space inside the compressor and returns to the lower part of the sealed container 1 again.

  Note that the oil level is kept above a certain level under normal conditions except for special cases where the operating state changes suddenly, such as when starting operation or immediately after switching to high speed rotation.

  FIG. 2 shows an example of the shape of the leaf spring 4. The flat spring 4 a is formed in a portion parallel to the oil level at the time of installation. The flat portion 4a is normally at a height located in the oil.

  When the compressor internal mechanism vibrates in the vertical direction due to the operation of the compressor, the flat spring 4 moves in the compressor oil 5 in the vertical direction because the leaf spring 4 receives the excitation force and vibrates in the same phase. It will be. At this time, the acceleration received by the flat portion 4 a is acceleration due to viscous resistance received from the compressor oil 5 and acceleration due to the elastic force of the leaf spring 4. That is, the flat surface portion 4 a of the plate-like member moves in the compressor oil 5, so that the flat surface portion 4 a receives the viscous resistance force in the direction opposite to the movement from the compressor oil 5.

  Therefore, ideally, a simple vibration is generated by the elastic force of the leaf spring 4, but the simple vibration can be attenuated by the viscous resistance received from the compressor oil 5. That is, the combination of the leaf spring 4 that is the support member and the flat surface portion 4a has a function of a hydraulic damper described later. At this time, the hydraulic damper is mainly formed by a flat portion. As a result, damping against vibration can be obtained, so that vibration of the leaf spring 4 and the compressor internal mechanism can be reduced.

  In this way, the vibration is effectively damped inside the hermetic container 1 of the compressor, so that the leaf spring 4 and the hermetic container 1 and further from the hermetic container 1 through the compressor leg member 6 to the outside of the compressor. The transmitted vibration can be reduced.

  FIG. 3 is a side sectional view showing a second example of the embodiment of the hermetic compressor. The compressor internal mechanism is elastically supported in the sealed container by the plate-attached coil spring 7, and the other elements and the compressor oil 5 have the same structure as the first example.

  FIG. 4 is an exploded view showing an example of the shape of the plate-attached coil spring 7, which includes two coil springs 7a and a plate member 7b. The plate member 7b is provided with a projection for connecting the coil spring 7a by press fitting, and these three parts are integrated. At this time, the hydraulic damper is mainly formed by the plate member 7b.

  Accordingly, it can be said that the hydraulic damper is fixed to the plate-like coil spring 7 (combination of the plate-like coil spring 7a and the plate member 7b) as the support member, and the support member is the hydraulic damper as in the first example. It can be said that it plays a function.

  The vibration during operation of the compressor can reduce the vibration during operation of the compressor by obtaining a damping effect when the flat surface portion of the plate member 7b receives the viscous resistance of the compressor as in the first example. .

  FIG. 5 is a side sectional view showing a third example of the embodiment of the hermetic compressor. The compressor internal mechanism is elastically supported in the hermetic container 1 by the coil spring 8, and the other elements and the compressor oil 5 have the same structure as the first and second examples. A donut-shaped plate 9 is fixed to a lower portion of the compressor internal mechanism with a rod-shaped member so as to be at a height position where the donut-shaped plate 9 is submerged in the compressor oil 5.

  FIG. 6 is a perspective view showing an example of the shape of the doughnut-shaped plate 9. A hole provided in the center of the disk is provided to avoid the shaft 10 protruding from the lower part of the compressor internal mechanism to the compressor oil 5. is there. As described above, the vibration during operation of the compressor can reduce the operation vibration of the compressor by obtaining a damping effect when the flat portion of the donut-shaped plate 9 receives viscous resistance from the compressor oil 5. Of course, the shape of the plate member is not limited to a circle.

  7 and 8 are modifications of the above-described embodiment. FIG. 7 shows a modification of the second example, and FIG. 8 shows a modification of the third example, and has a structure in which a flat portion oil passage hole 11 for receiving the viscous resistance of the compressor oil 5 is provided. By providing this hole, the moving path of the compressor oil 5 pushed away when the plane portion receives vibration and moves up and down is dispersed, and therefore, the advantage that the disturbance of the compressor oil 5 is less likely to occur compared to the case where there is no hole. There is. It is also possible to adjust the magnitude of the viscous resistance received by changing the hole diameter.

  The means capable of attenuating simple vibrations described above with reference to FIGS. 1 to 8 is referred to as a hydraulic damper.

  Note that the flat surface portion 4a in the first example is not necessarily a flat surface, and the surface thereof may be a wave shape, a saw shape, or the like. That is, it may be substantially parallel to the oil surface. In addition, even if it is tilted by several tens of degrees, the degree of attenuation is adjusted. The same applies to the flat surface portion of the plate member 7b and the flat surface portion 9a of the donut-shaped plate 9.

1 is a side sectional view of a compressor in Embodiment 1. FIG. 3 is a perspective view of an elastic support member in Embodiment 1. FIG. FIG. 4 is a side cross-sectional view of a compressor in Embodiment 2. FIG. 6 is an exploded view of an elastic support member in Embodiment 2. 4 is a side cross-sectional view of a compressor in Embodiment 3. FIG. The perspective view of the elastic support member in Example 3. FIG. The figure which shows an example of the elastic support member in a modification. The figure which shows an example of the elastic support member in a modification. The figure which shows an example which shows the vibration proof structure of the conventional compressor.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sealed container 2 Electric element 3 Compression element 4 Leaf spring 5 Compressor oil 6 Compressor leg member 7 Coil spring 8 with plate 8 Coil spring 9 Donut-shaped plate 10 Shaft 11 Oil through hole 12 Suspension spring 13 Support stay 14 Support spring

Claims (10)

In a hermetic compressor having a compressor internal mechanism supported by an elastic support member in a hermetic container storing compressor oil for lubricating each part,
A hermetic compressor in which a hydraulic damper fixed to the support member or the compressor internal mechanism is provided below a normal oil level of the compressor oil. In claim 1,
The hydraulic damper is a hermetic compressor in which the support member has a function. In claim 2,
The hermetic damper is formed by a flat portion substantially parallel to the oil level of the compressor oil. In claim 1,
The hydraulic damper is fixed to the support member, and is formed by a flat portion substantially parallel to an oil surface of the compressor oil. In claim 1,
The hermetic damper is fixed to the compressor internal mechanism, and is formed by a flat portion substantially parallel to the oil surface of the compressor oil. In any one of Claims 3 thru | or 5,
The hermetic compressor, wherein the flat portion is provided with an oil passage hole through which the compressor oil can pass. In a reciprocating type hermetic compressor having a compressor internal mechanism supported by an elastic support member in a hermetic container storing compressor oil for lubricating each part,
A reciprocating hermetic compressor in which a hydraulic damper fixed to the support member or the compressor internal mechanism is provided below a normal oil level of the compressor oil. In a sealed compressor for a refrigerator having a compressor internal mechanism supported by an elastic support member in a sealed container storing compressor oil for lubricating each part,
A hermetic compressor for a refrigerator, wherein a hydraulic damper fixed to the support member or the compressor internal mechanism is provided below a normal oil level of the compressor oil. It has a compressor internal mechanism consisting of an electric element and a compression element elastically supported in a sealed container, and the lower part of the sealed container is a compression for the purpose of lubricating parts such as shafts and pistons that slide in the compression process In a hermetic compressor that is a space for storing machine oil,
By providing a flat portion that is parallel to the oil surface at the portion of the elastic member that supports the compressor internal mechanism that is submerged in the compressor oil, the flat portion is in the same phase as the vibration of the compressor internal mechanism. Is a hermetic compressor characterized in that it is performed in compressor oil. It has a compressor internal mechanism consisting of an electric element and a compression element elastically supported in a sealed container, and the lower part of the sealed container is a compression for the purpose of lubricating parts such as shafts and pistons that slide in the compression process In a hermetic compressor that is a space for storing machine oil,
The plate-like member is fixed below the compressor internal mechanism so that the plate member is immersed in the compressor oil and the flat surface of the plate member is parallel to the oil surface, and the plate-like member is the same as the vibration of the compressor internal mechanism. A hermetic compressor characterized in that phase elastic vibration is performed in compressor oil.

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