JPS6179877A - Sealed type electric compressor - Google Patents

Abstract

PURPOSE:To reduce vibration and noise by installing a pair of permanent magnets having the reverse electrodes arranged oppositely onto an inside apparatus and installing a nonmagnetic conductor so as to be interposed between a pair of permanent magnets onto a sealed container for accommodating the inside apparatus. CONSTITUTION:In the inside apparatus of the captioned compressor, the compression elements such as a piston 2 for operating a cylinder 1 in slidable ways, connecting rod 3 for operating the piston 2 in reciprocation, rotor shaft 4, and a frame 5 are arranged in the upper part, and the electric driving elements such as a stator coil 6 for rotatably operating the rotor shaft 4 and a stator 7 are arranged in the lower part. Said inside apparatus is supported onto a sealed container 9 through a supporting spring 8. In the above, a pair of permanent magnets 10 having the reverse electrodes oppositely arranged are installed onto compression elements 1-5, and a nonmagnetic conductor 11 is installed onto a sealed container 9 so as to be interposed between the permanent magnets 10. Therefore, the vibration of the inside apparatus can be absorbed by utilizing a magnetic force.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a closed chamber @compressor used in refrigerators, air conditioners, and the like.

[Technical background of the invention and its problems]

Figure 2 shows a conventional closed-type Denkin-Oh R1 aircraft. The internal device of the hermetic compressor is the piston 2 that slides on the cylinder 1.
A compression element consisting of a connecting rod 3 which causes reciprocating motion of the piston 2, a rotor rotating part 4 which produces a rotational movement, and a frame 5 is upwardly moved, and a stator coil 6 and a stator 7 which produce a rotational interlock in the rotor rotating part 4. It is constructed by arranging the electric element below, and the internal device is
It is supported by the closed container 9 via.

In conventional hermetic dynamic compressors, the vibrations caused by the reciprocating movement of the piston and the pulsation of the refrigerant are suppressed by devising the shape of the structure and the hermetic container that support the internal equipment.
Vibration is suppressed because only the lower part of the internal itt is supported
If a vibration absorption device is installed in the middle or upper part of the internal device, there is no simple and effective vibration suppression method for hermetic electric compressors due to the structure and PiA manufacturing method. The noise generated by vibration has become a major problem.

[Purpose of the invention]

The purpose of the present invention is to suppress the vibrations generated in the internal device of a hermetic electric compressor from propagating to the hermetically sealed container 8'B, thereby preventing vibrations in the hermetic container and reducing the noise of the hermetically sealed electric compressor. It is something to do.

[Summary of the invention]

In this method, a pair of permanent magnets with opposing magnetic poles are placed facing each other, and a non-magnetic conductor is separately attached to the internal device and the container so as to be sandwiched between the permanent magnets. This is a hermetic electric compressor that absorbs vibrations and produces low noise.

[Effect of investigation]

According to the present invention, the movement generated in the internal device is easily absorbed by adding a damper between the internal device and the container, thereby achieving the purpose of reducing noise.

[Embodiments of the invention]

The present invention will be described in detail below with reference to the drawings.

FIG. 1 shows one embodiment of a hermetic compressor according to the present invention. The configuration is almost the same as that shown in Figure 2, which shows the conventional closed-type compressor, but in the present invention, a pair of permanent magnets with opposing magnetic poles placed opposite each other in the compression element are used to prevent vibration of the container. 10 is attached to the container 9, and a non-magnetic conductor 11 is attached to the container 9 so as to be sandwiched between the permanent magnets 10. A permanent magnet is placed inside the container, and a non-magnetic conductor is placed inside the container.
May be attached to an element.

Vibrations generated in the internal device cause relative motion between the permanent magnets compressed by the compression element and the non-magnetic conductor housed in the container. At this time, the non-magnetic conductor increases the magnetic flux between the permanent magnets. In order to cut the vibration, a frictional force corresponding to the magnetic force is generated, the vibrational energy is converted into thermal energy, and the movement is absorbed.

With such a structure, vibrations generated in the internal device can be absorbed and noise generation can be prevented. The manufacturing process of the non-magnetic 4JL body is easy, as it only needs to be attached to the container. Furthermore, installing permanent magnets and non-corrosive conductors all around the inner device and inside of the container increases the above-mentioned vibration absorption effect and further increases the noise reduction effect.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a hermetic type vibratory compressor according to the present invention, and FIG. 2 is a sectional view showing a conventional hermetic electric compressor. DESCRIPTION OF SYMBOLS 1... Cylinder, 2... Piston, 3... Connecting rod, 4... Rotor 1i21 rotation part, 5... Frame,
6... Stator coil, 7... Stator, 8...
- Spring, 9... Airtight container, 10... Permanent magnet, 11... Nonmagnetic conductor. Representative Patent Attorney Noriyuki Chika (and 1 other person) Figure 1 Figure 2

Claims (1)

[Claims] A compression element consisting of a cylinder, a piston, a connecting rod, a rotating part of a rotor, and a frame is placed in an airtight container above the stator.
In a hermetic electric compressor having an internal device configured by disposing an electric element consisting of a coil and a stator below,
A hermetic conductive compressor is characterized in that a pair of permanent magnets with opposing magnetic poles facing each other and a non-magnetic conductor sandwiched between the permanent magnets are separately attached to an internal device and a container.