Title:
FLOW CONTROL VALVE AND HOT WATER TYPE HEATING DEVICE USING IT
Document Type and Number:
Japanese Patent JP3279105
Kind Code:
B2
Abstract:
PURPOSE: To reduce the spring operating range (deflection quantity) of a constant-differential pressure valve (pressure reaction valve) for absorbing the change of the hot water flow of a heat exchanger due to the fluctuation of the engine revolving speed.
CONSTITUTION: The opening area of a hot water inlet pipe 19 into which the hot water from an engine 1 flows is squeezed by the first throttle section A1 of a control passage 17a provided on the valve element 17 of a flow control valve 4, the opening area of a hot water outlet pipe 20 communicated with the inlet side of a heating heat exchanger 3 is throttled by the second throttle section A2 of a control passage 17b provided on the valve element 17, and the intermediate section (a) of both control passages 17a, 17b is communicated with a by-pass circuit 5 by the third throttle section A3. The first and second throttle sections A1, A2 are formed into such shapes that the flow coefficient is decreased as the flow is increased, the third throttle section A3 is formed into such shape that the flow coefficient is kept nearly constant even when the flow is increased, and the change of the hot water flow of the heat exchanger 3 can be decreased.
Inventors:
Kouichi Ito
Yoshihiko Okumura
Yoshimitsu Inoue
cedar light
Yoshihiko Okumura
Yoshimitsu Inoue
cedar light
Application Number:
JP32496094A
Publication Date:
April 30, 2002
Filing Date:
December 27, 1994
Export Citation:
Assignee:
株式会社デンソー
International Classes:
F16K5/04; B60H1/08; F16K11/07; (IPC1-7): F16K5/04; B60H1/08; F16K11/07
Domestic Patent References:
| JP872529A |
Attorney, Agent or Firm:
Yoji Ito
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