Title:
AIR CONDITIONER AND POWER CONVERTER
Document Type and Number:
Japanese Patent JP3298450
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To delicately control even when a load is largely changed by more enlarging cooling capacity by PWM controlling a switch element by a pulse width modulation based on a value detected by a DC voltage detecting means.
SOLUTION: This air conditioner comprises a switch element 3 disposed in parallel with a DC power source rectified by a rectifying diode module connected to an AC power source, a DC voltage detecting means 10 for detecting a DC voltage of the DC power source, and a PWM control means 11 for controlling the element 3 by a pulse width modulation. The element 3 controls current of an AC reactor 17 to step up a DC voltage Vdc, and is PWM controlled by a PWM control means 11. The means 11 is controlled in response to change of the voltage Vdc of an input parameter detected by the means 10. Thus, DC voltage input to an inverter is always maintained constant. Accordingly, cooling capacity of the air conditioner can be enlarged.
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Inventors:
Makoto Ito
Tomio Yoshikawa
Hirokazu Nagura
Kenji Kubo
Tatsuo Ando
Tomio Yoshikawa
Hirokazu Nagura
Kenji Kubo
Tatsuo Ando
Application Number:
JP6608497A
Publication Date:
July 02, 2002
Filing Date:
March 19, 1997
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
F24F11/02; F04B35/04; F24F11/00; F25B49/02; H02M5/458; H02M7/48; (IPC1-7): H02M7/48; F24F11/02
Domestic Patent References:
| JP7167480A | ||||
| JP947084A | ||||
| JP522947A |
Attorney, Agent or Firm:
Yasuo Sakuta