JP2009097394A - Hermetic compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce a rotary direction vibration generated due to torque fluctuation with a simple structure in order to solve such a problem that a method positively reducing vibration value of a hermetic vessel is not adopted to a former compressor and that the hermetic vessel of the compressor vibrates. <P>SOLUTION: In this hermetic compressor, magnets 50 are attached in a circumference direction and a radial direction of an accumulator 13 of the hermetic compressor comprising an electric motor part, a compressor mechanism part driven by the electric motor part, the hermetic vessel 10 storing the compression mechanism part, an accumulator 13 and legs 11 supporting the same. Consequently, the weight of the accumulator part is increased and inertia moment is increased to reduce rotary direction vibration of the compressor over whole operation frequency. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for reducing vibration of a hermetic compressor used in a cooling device such as an air conditioner or a refrigerator.

  As the refrigerating and air-conditioning hermetic compressor, there are a reciprocating type, a rotary type, and a scroll type, and any type has been used in the field of refrigeration and air conditioning for home use and business use. Currently, it is growing by taking advantage of its features in terms of cost and performance.

  Among them, a compressor in which a compression mechanism and an electric mechanism are housed in a container is represented by a so-called hermetic compressor intended for soundproofing and maintenance-free, and a scroll compressor and a rotary compressor are mainstream. Conventionally, a rotary compressor installed in a vertical orientation as shown in FIG. 3 has been widely used. This is supported by legs 11 to which the sealed container 10 is welded. In the sealed container 10, an electric motor unit 20 and a compression mechanism unit 30 are provided. The sealed container 10 includes a suction pipe 12 connected to the evaporator side, an accumulator 13 connected to the suction pipe 12, and a discharge pipe 14 connected to the condenser side. The electric motor unit 20 that is operated at a frequency of 15 Hz to 150 Hz by an inverter or the like includes a stator 21 and a rotor 22. The stator 21 is fixed in the hermetic container 10, and the rotor 22 is in the stator 21. It is provided in a freely rotatable manner. The compression mechanism 30 includes a cylinder 31, a piston 34 that rotates in the cylinder 31 by an eccentric portion 33 of the crankshaft 32, and a vane (not shown) that separates a space formed by the cylinder 31 and the piston 34 into a compression space and a suction space. And the upper and lower bearings 36 and 37 that close both end surfaces of the cylinder 31 and the piston 34, and the driving force generated by the electric motor unit 20 is transmitted through the eccentric portion 33 of the crankshaft 32.

  Further, as a method for reducing vibrations of a compressor and other vibrating bodies, a structure in which a dynamic vibration absorber 15 is mounted on a sealed container 10 as shown in FIG.

Further, as a vibration reducing method of the rotary compressor, as shown in FIGS. 5 and 6 shown in Patent Document 2, a line segment that passes through the center of gravity of the hermetic compressor and is perpendicular to the axis of the crankshaft 32 is used. The thing which attached the two weights 40 made to oppose the side wall of the airtight container 10 which crossed 180 degrees was devised.
Japanese Utility Model Publication No. 53-8961 Japanese Utility Model Publication No. 61-241471

  However, in the conventional compressor, since the method of actively reducing the vibration value of the hermetic container has not been adopted, the vibration of the hermetic container of the compressor has been a problem.

  In addition, in the configuration of Patent Document 2 in which two weights opposed to the side wall of the hermetic container are attached 180 °, when the hermetic compressor is used in an air conditioner, the weight is prevented from contacting the fan of the outdoor unit. However, it has been extremely difficult to arrange the hermetic compressor in the outdoor unit so as not to interfere with the piping.

  In order to solve the above-described conventional problems, a hermetic compressor according to the present invention includes an electric motor unit, a compression mechanism unit driven by the electric motor unit, the electric motor unit, a sealed container containing the compression mechanism unit, and an iron outer casing. A magnet is attached in a circumferential direction or a radial direction of an iron outer shell of an accumulator of a hermetic compressor composed of an accumulator having a shell and legs supporting the accumulator.

  The hermetic compressor of the present invention can reduce vibration in the rotational direction due to torque fluctuation due to compression by attaching a magnet to the accumulator, thereby increasing the mass of the accumulator.

  In addition, by using a magnet, attachment is easy, and when it is unnecessary, it can be easily removed, so that the mass can be adjusted while sharing the accumulator.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 is a longitudinal sectional view of a hermetic compressor according to Embodiment 1 of the present invention.

  As shown in FIG. 1, the sealed container 10 is supported by welded legs 11. In the sealed container 10, an electric motor unit 20 and a compression mechanism unit 30 are provided. The sealed container 10 includes a suction pipe 12 connected to the evaporator side, an accumulator 13 connected to the suction pipe 12, and a discharge pipe 14 connected to the condenser side. The electric motor unit 20 that is operated at a frequency of 15 Hz to 150 Hz by an inverter or the like includes a stator 21 and a rotor 22. The stator 21 is fixed in the hermetic container 10, and the rotor 22 is in the stator 21. It is provided in a freely rotatable manner. The refrigerant in the refrigeration cycle is compressed and circulated by the compression mechanism 30 driven by the electric motor 20. The torque fluctuation generated in the compression process at that time becomes vibration in the rotation direction of the compressor and is transmitted to the refrigeration cycle.

  By attaching the magnet 50 in the radial direction of the accumulator 13, the moment of inertia in the rotation direction of the compressor is increased, and it is possible to reduce circumferential vibration caused by torque fluctuation.

(Embodiment 2)
FIG. 2 is a plan view of the hermetic compressor according to the second embodiment of the present invention.

  As shown in FIG. 2, the same effect can be obtained by attaching two magnets 50 having the same mass in the circumferential direction of the accumulator 13.

  As described above, the hermetic compressor according to the present invention can be applied to a use using a heat pump.

1 is a longitudinal sectional view of a hermetic compressor according to Embodiment 1 of the present invention. The top view of the hermetic compressor in Embodiment 1 of the present invention Cross section of a conventional hermetic compressor Side view of vibration reduction example shown in Patent Document 1 Sectional view of vibration reduction example shown in Patent Document 2 Plan view of vibration reduction example shown in Patent Document 2

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Airtight container 11 Leg 12 Intake pipe 13 Accumulator 14 Discharge pipe 15 Dynamic vibration absorber 20 Electric motor part 21 Stator 22 Rotor 30 Compression mechanism part 31 Cylinder 32 Crankshaft 33 Eccentric part 34 Piston 36 Upper bearing 37 Lower bearing 40 Weight 50 Magnet

Claims (2)

A hermetic compressor composed of an electric motor part, a compression mechanism part driven by the electric motor part, the electric motor part, a sealed container containing the compression mechanism part, an accumulator having an iron outer shell, and a leg supporting the accumulator. A hermetic compressor in which a magnet is attached in the radial direction of the accumulator outer shell. A hermetic compressor characterized in that a magnet is attached in the circumferential direction of the accumulator outer shell.

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