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Electric compressor

An electric compressor and electric motor technology, which is applied in electric components, machines/engines, electromechanical devices, etc., can solve the problems such as the overall length of the rotating shaft 4 becoming longer, and the wear of the sliding surface.

Inactive Publication Date: 2004-08-18
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, if the necessary bearing length of the single-bearing type bearing portion 6 is maintained, the total length of the rotating shaft 4 becomes longer, and the distance between the center of gravity of the rotor 14 and the bearing portion 6 also becomes longer. Wear may occur on the sliding surfaces of both the bearing unit 6 and the rotating shaft 4

Method used

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  • Electric compressor
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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] figure 1 It is a longitudinal sectional view of the electric compressor according to Embodiment 1 of the present invention.

[0035] Such as figure 1 As shown, a compression mechanism unit 102 and a motor unit 103 for driving the compression mechanism unit are accommodated in an airtight container 101 .

[0036] The refrigerant enclosed in the airtight container 101 is a hydrocarbon-based refrigerant with a low global warming potential (GWP) represented by R134a or R600a having an ozone destruction coefficient of zero. In addition, lubricating oil 112 having a viscosity of 5 to 10 [cts] compatible with the refrigerant is stored in the airtight container 101 .

[0037] Next, the compression mechanism unit 102 will be described in detail below. The rotary shaft 104 has an eccentric shaft portion 117 , a main shaft portion 116 and a sub shaft portion 118 . The main shaft part 116 and the sub shaft part 118 are arranged coaxially up and down with the eccentric shaft p...

Embodiment 2

[0054] figure 2 It is a vertical cross-sectional view of an electric compressor according to Embodiment 2 of the present invention. In addition, the same symbols are used for the same configuration as in the first embodiment, and detailed description thereof will be omitted.

[0055] exist figure 2 Among them, the motor part 203 is a 2-pole synchronous motor, which is composed of a stator 213 in which a coil is wound on a stator core composed of laminated electromagnetic steel sheets, and a rotor 214 in which a secondary conductor is provided on a rotor core 215 composed of laminated electromagnetic steel sheets. The rotor core 215 incorporates a permanent magnet 215 a made of, for example, a ferromagnetic material such as neodymium, iron, or boron, which is a rare-earth magnet. In addition, other configurations are the same as those of the first embodiment.

[0056] The operation of the electric compressor configured as above will be described below.

[0057] The motor ...

Embodiment 3

[0060] image 3 It is a longitudinal sectional view of an electric compressor according to Embodiment 3 of the present invention. In addition, the same symbols are used for the same configuration as in the first embodiment, and detailed description thereof will be omitted.

[0061] Such as image 3 As shown, a compression mechanism unit 302 and a motor unit 303 for driving the compressor are housed in the airtight container 101 .

[0062] The cylinder block 305 constituting the compression mechanism part 302 is made of cast iron and forms the substantially cylindrical compression chamber 110, and the main bearing 320 pivotally supporting the main shaft part 116 of the rotary shaft 104 and the subshaft part 118 pivotally supporting the main shaft part 118 are fixed to the cylinder block 305. The secondary bearing 121.

[0063] The motor unit 303 is composed of a stator 113 and a rotor 314, and is a transformer-driven motor driven at a plurality of operating frequencies. The...

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PUM

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Abstract

A compressor includes a motor unit formed of a stator and a rotor, a compressor mechanism driven by the motor unit, and an enclosed container accommodating the foregoing elements. The compressor mechanism includes a cylinder block equipped with a compressing chamber and a piston. A shaft directly coupled to the rotor that drives the piston is supported by a double-sided bearing system, namely, a main bearing and a sub bearing. This structure allows preventing the shaft from slanting, and reducing a loss and a noise caused by sliding. As a result, a low profile, highly reliable and efficient compressor is obtainable.

Description

technical field [0001] The invention relates to an electric compressor used in refrigerating equipment, air conditioning equipment and the like. Background technique [0002] In recent years, for electric compressors used in refrigerators such as household freezers and refrigerators, in order to reduce power consumption, the low viscosity of the lubricating oil and the high efficiency brought about by the use of transformer drives and synchronous motors have been promoted. change. Moreover, in order to improve the volumetric efficiency of a freezer-refrigerator, a smaller compressor is desired. [0003] As an existing electric compressor, in order to improve efficiency, the stator and the main bearing are often improved, such as the electric compressor disclosed in Japanese Patent Application Laid-Open No. 2001-73948. [0004] Figure 5 It is a longitudinal sectional view of such a conventional electric compressor. exist Figure 5 In the airtight container 1 of the electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B39/00F04B35/04
CPCF04B35/04F04B39/00
Inventor 小岛健垣内隆志川端淳太长尾崇秀坪井康祐明石浩业片山诚洼田昭彦
Owner PANASONIC CORP