Title:
HOT/COLD WATER MIXING CONTROLLER
Document Type and Number:
Japanese Patent JPH02306317
Kind Code:
A
Abstract:
PURPOSE:To prevent hunting phenomenon and to supply a stable mixed hot water temperature by detecting the fluctuation of a temperature deviation and switching the driving quantity of a mixing valve driving means by means of the period and the size of the temperature deviation. CONSTITUTION:When hunting occurs, a temperature deviation detection means 28 outputs a signal when the temperature deviation of a mixed hot water temperature detection means 15 a setting means 17 attains more than a constant value. A maximum value detection means 30 detects the maximum value of the subsequent mixing hot water temperature. Then, a timer means 29 starts and action and the timer means 29 counts time till the subsequent maximum value and obtains the period. The period and the maximum value are inputted to a comparison means 31, and the driving quantity is outputted to a main control means 26 from two values. The main control means 26 selects an optimum means from plural driving quantity setting means 27-1 to 27-4 by the signal of the comparison means 31, reduces a gain for controlling hunting and drives a coil 23 being the mixing valve driving means. Thus, hunting is eliminated, and the mixed hot water temperature becomes equal to the setting temperature and is stabilized.
Inventors:
SHIBA BUNICHI
UEDA YASUKIYO
YONEKUBO HIROAKI
NAGAOKA YUKIO
KIDOUCHI YASUO
UEDA YASUKIYO
YONEKUBO HIROAKI
NAGAOKA YUKIO
KIDOUCHI YASUO
Application Number:
JP12691689A
Publication Date:
December 19, 1990
Filing Date:
May 19, 1989
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
F16K31/66; F24D17/00; G05D23/13; (IPC1-7): F16K31/66; F24D17/00; G05D23/13
Domestic Patent References:
| JPS61262286A | 1986-11-20 | |||
| JPS62231305A | 1987-10-09 | |||
| JPS6353106B2 | 1988-10-21 | |||
| JPS62187903A | 1987-08-17 |
Attorney, Agent or Firm:
Tomoyuki Takimoto (1 person outside)