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Compressor driving apparatus and refrigeration circulating apparatus

A technology for driving devices and compressors, applied in the direction of automatic disconnection emergency protection devices, circuit devices, machines/engines, etc., can solve the problem of unable to prevent the abnormal temperature rise of hermetic compressors, improve safety, prevent pressure or the effect of abnormal temperature rise

Inactive Publication Date: 2011-08-03
TOSHIBA CARRIER CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this situation, even if the protection device is housed in the airtight casing of the hermetic compressor as described above, and the protection device operates when the abnormal temperature rises, the hermetic compressor can continue to operate while maintaining the open-phase operation. There is a problem that the abnormal temperature rise of the hermetic compressor cannot be prevented

Method used

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  • Compressor driving apparatus and refrigeration circulating apparatus
  • Compressor driving apparatus and refrigeration circulating apparatus
  • Compressor driving apparatus and refrigeration circulating apparatus

Examples

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Embodiment Construction

[0043] Next, an embodiment of the present invention will be described with reference to the drawings.

[0044] figure 1 In the figure, reference numeral 1 is a hermetic compressor, and a permanent magnet motor 10 and a compression mechanism unit 20 driven by the permanent magnet motor 10 are accommodated in a hermetic casing 1 a. The permanent magnet motor 10 is also called a brushless DC motor, and includes: a stator 11 provided in contact with the inner peripheral surface of the airtight casing 1a, a rotor 12 rotatably provided inside the stator 11, and a center shaft of the rotor 12 The shaft 13 of the rotor 12 is rotated by the interaction of a magnetic field generated by energizing each phase winding of the stator 11 and a magnetic field formed by a plurality of permanent magnets embedded in the rotor 12 . The rotational power of the rotor 12 is transmitted to the compression mechanism unit 20 through the shaft 13 .

[0045] In addition, suction pipes 2a, 2b are provide...

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PUM

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Abstract

A compressor driving device and a refrigeration cycle device can reliably prevent the abnormal increase of pressure or temperature of closed compressor no matter the type of motor installed on the closed compressor. The safety of the compressor driving device and the refrigeration cycle device is excellent. A protecting device (15) is installed in the closed casing (1a) of closed compressor (1). The protecting device (15) acts when the pressure in the closed casing (1a) increases abnormally for forming the short-circuited current of phase winding. When the protecting device (15) acts, an overcurrnt which can be detected by an overcurrent detector (42) flows in the inverter. Thus the action of inverter can be stopped with a control part (60).

Description

technical field [0001] The invention relates to a compressor driving device and a refrigeration cycle device with the function of protecting a hermetic compressor. Background technique [0002] As a drive device for a hermetic compressor composed of a motor and a compression mechanism, there is a drive device that converts the voltage of an industrial AC power supply into a DC voltage, converts the DC voltage into a three-phase analog AC voltage by switching, and applies Inverter (inverter) for each phase winding of the above-mentioned motor. In this case, in order to sequentially switch the energization of multiple phases from the inverter to the windings of each phase, the voltage induced by the non-energized phase windings of the windings of each phase is detected, and the motor rotor is detected based on the detected voltage. The rotation position of the inverter, and control the switching time of the inverter according to the detected position. [0003] In addition, i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B49/10H02H5/00H02H7/122H02M7/48H02P27/06H02P6/12
Inventor 二见俊彦
Owner TOSHIBA CARRIER CORP
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