Title:
METHOD AND DEVICE FOR CONTROLLING TEMPERATURE RISE OF AUTONOMOUS INVERTER-DRIVEN HYDRAULIC UNIT
Document Type and Number:
WIPO Patent Application WO/2004/046562
Kind Code:
A1
Abstract:
A device for controlling temperature rise of an autonomous inverter-driven hydraulic unit comprises a temperature rise control portion (15) and a switch portion (16). The temperature rise control portion (15) performs a predetermined process using a current speed and current pressure as input information and outputs a first switch command. The switch portion (16) is controlled by the first switch command so as to control on/off of power supplied to a fan motor (7a). The device causes an oil temperature to quickly rise to a level where a hydraulic unit driven by a hydraulic pump can work in an optimum condition.
Inventors:
NAKATA TETSUO (JP)
YANAGIDA YASUTO (JP)
OCHI YOSHIYUKI (JP)
YANAGIDA YASUTO (JP)
OCHI YOSHIYUKI (JP)
Application Number:
PCT/JP2003/014612
Publication Date:
June 03, 2004
Filing Date:
November 17, 2003
Export Citation:
Assignee:
DAIKIN IND LTD (JP)
NAKATA TETSUO (JP)
YANAGIDA YASUTO (JP)
OCHI YOSHIYUKI (JP)
NAKATA TETSUO (JP)
YANAGIDA YASUTO (JP)
OCHI YOSHIYUKI (JP)
International Classes:
G01K7/00; F15B21/0427; G01K3/10; H02P6/06; H02P6/08; H02P6/15; H02P6/21; (IPC1-7): F15B21/04; G01K7/00; H02P6/06
Foreign References:
| JP2002061611A | 2002-02-28 | |||
| JPS60165558U | 1985-11-02 | |||
| JPS5446990U | 1979-03-31 | |||
| JPH09216782A | 1997-08-19 | |||
| EP0479464A2 | 1992-04-08 | |||
| JPH09255262A | 1997-09-30 | |||
| JPH0933145A | 1997-02-07 | |||
| JPS63170571A | 1988-07-14 | |||
| JPH03158376A | 1991-07-08 |
Other References:
See also references of EP 1574723A4
Attorney, Agent or Firm:
Tsugawa, Tomoo (7-7 Chuo 2-chome, Joto-k, Osaka-shi Osaka, JP)
Download PDF: