JP2004324638A - Closed type compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a closed-type compressor arranged to prevent occurrence of resonance of a closed container by altering the resonance frequency of the container. <P>SOLUTION: A dumping member (40), designed to be flexibly supported by an upper container (11) based on a specified elastic force, is attached to a side of the upper container (11). The dumping member (40) has a fixation part (41) to be fixed to the upper container (11) and an elastic support part (42) flexibly supported by the upper container (11). The elastic support part (42) has a protruding section (42a), which protrudes from one side of the fixation part, and a bending section (42b), which connects the fixation part (41) and the protruding section (42a), and bends to the other side of the fixation part. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a hermetic compressor, and more particularly to a hermetic compressor capable of attenuating noise and vibration generated when the hermetic compressor operates.

  Generally, a compressor is a device that applies pressure to a substance by mechanical force to reduce the volume or change the state of the substance. Among such compressors, there is a hermetic compressor that compresses a refrigerant in a closed space.

  A general hermetic compressor having such a function includes a driving unit that generates power inside a closed container formed by combining an upper container and a lower container, and receives power from the driving unit to suck and compress a refrigerant. And a compression unit.

  The driving unit includes a stator for forming a magnetic field and a rotor having a rotating shaft inserted therein. An eccentric shaft is provided above the rotating shaft.

  The driving unit includes a stator that applies a power source to form a magnetic field, a rotor that rotates by interacting with the stator, and a rotating shaft that is axially inserted into the center of the rotor and rotates integrally. Consists of

  In addition, the compression section includes a cylinder block provided with a compression chamber, a cylinder head provided with a suction chamber and a discharge chamber for guiding suction and discharge of refrigerant to and from the compression chamber, and a straight line extending through the interior of the compression chamber. And a reciprocating piston.

  When power is applied to the hermetic-type compressor configured as described above, the rotor having the rotating shaft inserted therein interacts and rotates due to a magnetic field formed by the stator. At this time, the rotating motion of the rotor is converted into a linear reciprocating motion of the piston via a connecting rod connecting the rotating shaft and the piston, and the piston sucks, compresses, and discharges the refrigerant while reciprocating in the compression chamber.

  However, such a conventional hermetic compressor does not have a specific high-frequency sound and low frequency radiated by vibration of pressure pulsation of the refrigerant generated by compression of the refrigerant, mechanical noise due to friction between the inner wall of the compression chamber and the piston, and vibration. Since the closed container resonates when the frequency sound matches the resonance frequency of the closed container, there is a problem that abnormal noise is generated.

  Therefore, the present invention has been made to solve such a conventional problem, and an object of the present invention is to change the resonance frequency of the closed container to thereby prevent the closed container from resonating. An object of the present invention is to provide a compressor.

  In order to achieve the above-described object, the present invention provides a hermetically sealed container containing a driving unit that generates power, a compression unit that receives power from the driving unit and compresses a refrigerant, and a hermetically sealed container with a predetermined elastic force. A hermetic compressor comprising: a damping member that is elastically supported by a container and changes a resonance frequency of the hermetic container.

  The closed container may be formed by combining an upper container and a lower container, and the damping member may be provided on at least one of the upper container and the lower container.

  The damping member may have a fixing portion fixed to the closed container, and an elastic supporting portion that comes into contact with the closed container while being elastically deformed to give an elastic force to the closed container.

  The fixing portion of the damping member may be fixed to the closed container by spot welding.

  The elastic supporting portion of the damping member may have a projecting portion which is elastically deformed by projecting to one side of the fixing portion of the damping member and elastically supported by the closed container.

  The elastic support portion of the damping member connects the fixed portion and the projecting portion of the damping member, and has a bent portion bent on the other side of the fixed portion so that the elastic support portion provides elastic force to the closed container. Good.

  The hermetic compressor to which the present invention is applied has an effect that the damping member attached to the hermetic container is continuously elastically supported by the hermetic container to change the resonance frequency of the hermetic container.

  Therefore, there is an effect that noise is reduced by preventing the closed container from resonating due to specific high frequency sound and low frequency sound radiated inside the closed type compressor.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a side sectional view showing the overall structure of a hermetic compressor to which the present invention is applied.

  As shown in FIG. 1, the hermetic compressor to which the present invention is applied includes a driving unit 20 that generates power in a closed container 10 in which an upper container 11 and a lower container 12 are connected, and power from the driving unit 20. And a compression unit 30 for receiving and compressing the refrigerant.

  The drive unit 20 includes a stator 21 for forming a magnetic field and a rotor 22 having a rotating shaft 23 inserted therein. An eccentric shaft 24 is provided above the rotating shaft 23.

  The compression section 30 includes a cylinder block 31 in which a compression chamber 31a is formed, a cylinder head 32 in which a suction chamber 32a and a discharge chamber 32b are formed for guiding suction and discharge of refrigerant, and a compression chamber 31a. And a valve portion 33 provided between the cylinder block 31 and the cylinder head 32. The suction valve plate has a suction valve plate and a discharge valve plate for interrupting the suction and discharge of the refrigerant passing therethrough.

  Further, a piston 34 is provided inside the compression chamber 31a. The piston 34 is connected to the eccentric shaft 24 of the rotary shaft 23 via a connecting rod 35, and the eccentric rotational motion is converted into a linear reciprocating motion, and the piston 34 moves forward and backward inside the compression chamber 31a.

  On the other hand, on one side of the upper container 11, a damping member 40 is provided which is elastically supported by the upper container 11 with a predetermined elastic force and changes the resonance frequency of the upper container 11. Hereinafter, the structure of the damping member 40 will be described in detail with reference to FIG.

  As shown in FIG. 2, the damping member 40 is made of a metal material, and has a fixing portion 41 fixed to the upper container 11 and an elastic supporting portion 42 elastically supported by the upper container 11.

  The fixing portion 41 has a flat plate shape and is fixed in close contact with the upper container 11, but is fixed by spot welding to ensure this fixing.

  The elastic portion 42 has a protruding portion 42a protruding to one side of the fixing portion 41, and a bending portion 42b connecting the fixing portion 41 and the protruding portion 42a and bending so as to expand to the other side.

  In the above embodiment, the damping member 40 is described as being limited to the one that is installed in the upper container 11. However, the damping member 40 may be provided not only in the upper container 11 but also in the lower container 12.

  FIG. 3 is a side sectional view showing a state before the hermetic container 10 and the damping member 40 of the hermetic compressor are fixed, and FIG. 4 is a sectional view of the hermetic container 10 of the hermetic compressor to which the present invention is applied. It is a sectional side view showing the state where 40 was fixed.

  As shown in FIGS. 3 and 4, when the fixing portion 41 is fixed to the closed container 10 by spot welding, the protruding portion 42 a is pushed rearward by the closed container 10 by the protrusion length (S). Therefore, the elastic supporting portion 42 including the projecting portion 42a and the bent portion 42b is elastically deformed and supported by the closed container 10.

  At this time, the bent portion 42b prevents the elastic supporting portion 42 from being plastically deformed by making the elastic deformation smoothly by the bent shape. Therefore, the elastic portion 42 can continuously exert an elastic force on the closed container 10.

  Next, the operation and operation of the hermetic compressor having the damping member 40 of the present invention configured as described above will be described.

  First, when power is applied to the hermetic compressor, the rotor 22 rotates by electromagnetic interaction with the stator 21. Then, the piston 34 connected to the eccentric shaft 24 of the rotor 22 via the connecting rod 35 linearly reciprocates in the compression chamber 31a, so that the refrigerant is sucked and compressed, and then discharged.

  When the hermetic compressor is operated in this manner, specific high-frequency sound and low-frequency sound are generated on the inner wall of the hermetic container 10 due to pressure pulsation of the refrigerant, noise due to friction between the inner wall of the compression chamber 31a and the piston 34, and vibration. Radiated. At this time, since the resonance frequency of the closed container 10 is changed by the damping member 40, it is possible to prevent specific high-frequency sound and low-frequency sound radiated in the closed container 10 from resonating. That is, since the damping member 40 is continuously elastically supported by the closed container 10 with a predetermined elastic force, the resonance frequency of the closed container 10 is changed.

  FIG. 5 is a graph showing a comparison between a conventional hermetic compressor and the degree of noise generated by the hermetic compressor to which the present invention is applied. As shown in the drawing, the hermetic compressor having the hermetic container 10 provided with the damping member 40 according to the present invention generates less noise than a hermetic compressor including a conventional hermetic container. This is because the damping member 40 according to the present invention changes the resonance frequency of the closed container 10, thereby preventing the closed container 10 from resonating.

BRIEF DESCRIPTION OF THE DRAWINGS It is a sectional side view which shows the whole structure of the hermetic compressor to which this invention is applied. It is a perspective view showing the damping member fixed to the upper container of the hermetic compressor to which the present invention is applied. FIG. 2 is a side sectional view showing a state before a closed container and a damping member of the closed type compressor to which the present invention is applied is fixed. It is a sectional side view showing the state where the damping member was fixed to the closed container of the closed type compressor to which the present invention was applied. 6 is a graph comparing noise generated by a conventional hermetic compressor and a hermetic compressor to which the present invention is applied.

Explanation of reference numerals

  DESCRIPTION OF SYMBOLS 10 Closed container, 11 Upper container, 12 Lower container, 20 Drive part, 21 Stator, 22 Rotor, 23 Rotation axis, 24 Eccentric axis, 30 Compression part, 31 Cylinder block, 31a Compression chamber, 32 Cylinder head, 32a Suction Chamber, 32b discharge chamber, 33 valve section, 34 piston, 35 connecting rod, 40 damping member, 41 fixing section, 42 elastic section, 42a projecting section, 42b bending section

Claims (6)

A sealed container containing a driving unit that generates power and a compression unit that receives power from the driving unit and compresses the refrigerant,
And a damping member which is elastically supported by the closed container with a predetermined elastic force and changes a resonance frequency of the closed container.   The hermetic compressor according to claim 1, wherein the closed container is formed by combining an upper container and a lower container, and the damping member is provided in at least one of the upper container and the lower container.   2. The damping member according to claim 1, wherein the damping member includes a fixing portion fixed to the closed container, and an elastic supporting portion that is in contact with the closed container while being elastically deformed to apply elastic force to the closed container. A hermetic compressor as described.   The hermetic compressor according to claim 3, wherein the fixing portion of the damping member is fixed to the closed container by spot welding.   4. The hermetic compressor according to claim 3, wherein the elastic supporting portion of the damping member has a projecting portion that is elastically deformed by projecting to one side of the fixing portion of the damping member and elastically supported by the closed container. .   The elastic supporting portion has a bent portion that is bent on the other side of the fixing portion so as to connect a fixing portion of the damping member and the protruding portion, and the elastic supporting portion applies elastic force to the closed container. The hermetic compressor according to claim 5, wherein

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