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Title:
FORCED CIRCULATION TYPE WATER HEATING DEVICE
Document Type and Number:
Japanese Patent JPS57129341
Kind Code:
A
Abstract:

PURPOSE: To optimum-control the flow to a heat exchanger and ensure the operation of a flow passage closing valve to the heat exchanger by method wherein the flow characteristics of a valve in a circuit by-passing a heating part is rendered to be discontinuous to that of the flow passage closing valve to the heat exchanger.

CONSTITUTION: The heat exchanger 2 in the heating part A and a bathtub 7 are connected to a heating circuit 11, in which a circulating pump 5 is provided and midway of which a temperature sensor 14 is arranged. Feed water temperature signal from the sensor 14 controls a solenoid valve 15 arranged at the influx side of the heat exchager 2. The by-pass circuit 13, which by-passes the heating part A and in which a by-pass valve 12 is arranged, is provided by branching-off the piping upstream of the solenoid valve 15. The by-pass valve 12 is a direct-acting pressure relief valve consisting of a valve 41 which is urged, through a spring 39 by means of a pressure setting screw 37, against a valve seat 43 in flush with the bottom surface of a hole 32 communicating to an influx port 33 and has a characteristics which causes a discontinuous change between differential pressure and flow rate.


Inventors:
KOGA RIYOUICHI
SAIJIYOU MASARU
TAKAHASHI YUTAKA
Application Number:
JP1615281A
Publication Date:
August 11, 1982
Filing Date:
February 04, 1981
Export Citation:
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Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
F24H1/00; F24D19/10; (IPC1-7): F24H1/18; F24H9/20
Domestic Patent References:
JPS5431366A1979-03-08
JP50152220B



 
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