Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
WARM WATER TYPE HEAT EXCHANGER
Document Type and Number:
Japanese Patent JPH0538931
Kind Code:
A
Abstract:

PURPOSE: To prevent the lowering of a heat radiation quantity when an engine speed is low.

CONSTITUTION: A path switching valve 28 for switching a path from a first path to a second path when an engine speed is lowered than a set value, is provided on a heater core 5 having the first path, in which warm water is U-shapedly flowed in the inside, and the second path in which the warm water is run in one direction in the inside. With this constitution, when the engine speed is set to a value in an idling condition and the supply quantity of the warm water to the heater core 5 is little, the first path, in which the warm water is U-shapedly flowed in the heater core 5, is switched to the second path, in which the warm water is run in one direction in the heater core 5, to reduce water-passing resistance in the heater core 5 for increasing the heat radiation quantity of the heater core 5, eventually ensuring necessary heating capacity.


Inventors:
Kajikawa, Kichiji
Application Number:
JP1991000197830
Publication Date:
February 19, 1993
Filing Date:
August 07, 1991
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
NIPPONDENSO CO LTD
International Classes:
B60H1/00; B60H1/08; (IPC1-7): B60H1/08
Attorney, Agent or Firm:
石黒 健二