Title:
COOL/HOT WATER PUMP DRIVING DEVICE
Document Type and Number:
Japanese Patent JP3298026
Kind Code:
B2
Abstract:
PURPOSE: To provide a cool/hot water pump driving device which can reduce the unnecessary rise of temperature in a heating mode and also can reduce the cooling load in a cooling mode.
CONSTITUTION: A cool/hot water pump driving device circulates the cool/hot water produced by an absorption type cool/hot water machine 1 between the machine 1 and a fan coil unit 5 provided with an electromagnetic two way valve 4 and supplies the heat to the heat load. The circulation of the cool/hot water is carried out by a speed control type cool/hot water pump 7. The opening degree of the valve 4 is monitored by a monitoring device 8, and the cool/hot water is made to bypass each unit 5 through control of the opening degree of a three way valve 2. So that the least flow rate is secured for the cool/hot water of the machine 1. The outlet temperature of cool/hot water of the machine 1 can be detected by a temperature sensor 11. A controller 12 reduces the rotational speed of the pump 7 based on the detection signal supplied from the sensor 11 when the temperature of cool/hot water rises higher than a fixed level in a heating mode or falls lower than the fixed level in a cooling mode respectively.
Inventors:
Hiroyuki Shimizu
Application Number:
JP4091293A
Publication Date:
July 02, 2002
Filing Date:
March 02, 1993
Export Citation:
Assignee:
Yazaki Corporation
International Classes:
F04B49/06; F24F11/02; F25B15/00; G05D23/00; (IPC1-7): G05D23/00; F24F11/02; F25B15/00
Domestic Patent References:
| JP61253501A | ||||
| JP4340348A |
Attorney, Agent or Firm:
Tatsuyuki Unuma