Hitachi Astemo Ltd.

Hiroshi Sakai

Yoshinori Kawai

Kan Kobayashi

Junnosuke Nakatsugawa

Masaki Koyama

Tsutomu Ito

A linear motor for a compressor having asymmetric load characteristics in both directions of a stroke, improves the service life of a bearing, and reduces a total length of a system. The linear motor includes a movable element having a magnetic pole frame and a plurality of field element poles, and a plurality of magnetic pole teeth around which windings are wound and that are provided so as to sandwich the movable element, and the movable element and the magnetic pole teeth are relatively displaced. The plurality of field element poles include primary magnets arranged between the plurality of magnetic pole teeth and secondary magnets arranged externally relative to spaces between the plurality of magnetic pole teeth in either direction of the relative displacement. A neck part of the magnetic pole frame connected to a bearing is arranged externally in the other direction of the relative displacement direction.

Linear motor, compressor equipped with linear motor, refrigerator equipped with compressor, and vehicle air suspension equipped with compressor

An air suspension apparatus includes a compressor configured to compress air, a tank configured to store the air, a tank-side suction conduit configured to supply the compressed air in this tank to an intake side of the compressor, a tank conduit connecting a discharge side of the compressor and the tank, an air suspension connected to the discharge side of the compressor via an air drier, an intake electromagnetic valve provided in the tank-side suction conduit, a return electromagnetic valve provided in the tank conduit, and a discharge conduit provided so as to branch off from between the discharge side of the compressor and the air drier and configured to be connected to an atmosphere by opening a discharge electromagnetic valve.

Air suspension apparatus

Provided is a compressor capable of achieving a reduction in overall size and an improvement in vehicle mountability by using a linear motor. The compressorcomprises a linear motorhaving a reciprocating mover, a compression unithaving a pistonconnected to the moverat one end side of the linear motorso as to reciprocate and a cylinderslidably accommodating the pistonto form a compression chamberB, and an air dryerconnected to a cylinder headof the compression chamberB of the compression unitand filled therein with a desiccantC. The air dryeris disposed along the axis in the movement direction of the moverthe piston

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Tama, Japan

Hiroshi Sakai