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US20060124078: Water feed controller for a boiler

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Filing Information

Inventor(s) Jeffrey Merwin ·
Assignee(s) MERWIN JEFFREY C ·
Correspondent LEWIS, RICE & FINGERSH, LC;ATTN: BOX IP DEPT. ·
Application Number US11298159
Filing date 12/09/2005
Publication date 06/15/2006
Predicted expiration date 12/09/2025
U.S. Classifications 122/451.00R  ·
International Classifications F22D526  ·
Kind CodeA1
21 Claims, 6 Drawings


Abstract

A water feed controller which can provide for the addition of a preset fixed amount of water to be added after a low water condition is removed. This system provides for a preset fixed amount of water to be added to a boiler above the amount which triggers the low water condition. This generally inhibits excess cycling from the boiler operating at its minimum safe water level as well as inhibiting overfilling of the boiler. Further, there is discussed a water feed controller which can measure the amount of water added over a prior predetermined period (such as 30 days) which serves as a floating window of time so that a leak or other condition resulting in overly frequent filling can be detected quickly.

Independent Claims | See all claims (21)

  1. 1. A water feed controller for a boiler, the controller comprising: electronics for monitoring the signal from a low water cut-off (LWCO); electronics for opening and closing a water path; and a processor; wherein when said electronics for monitoring detect a low water signal from said LWCO, said processor initiates opening of said water path to allow water to flow into said boiler; wherein said water path remains open until said LWCO ceases signaling a low water condition; and wherein said processor allows said water path to remain open after said LWCO ceases signaling said low water condition, so a preset fixed amount of water is added into said boiler after said LWCO ceases signaling said low water condition.
  2. 7. A water feed controller for a boiler, the controller comprising: means for detecting a low water condition in said boiler; and means for opening and closing a water path into said boiler; wherein when said means for detecting detects a low water condition, said means for opening and closing opens said water path to allow water to flow into said boiler; wherein said means for opening and closing maintains said open water path until said means for detecting no longer detects said low water condition; and wherein said means for opening and closing does not close said open water path, until a preset fixed amount of water is added into said boiler after said means for detecting no longer detects said low water condition.
  3. 11. A method for feeding water to a boiler, the method comprising the steps of: detecting a low water condition in said boiler; opening a water path to allow water to flow into said boiler; waiting for said low water condition to cease; allowing said water path to remain open until a preset fixed additional amount of water has been added to said boiler after said low water condition ceased; and closing said water path.
  4. 18. A system for controlling water feed to a boiler, the system comprising: electronics for monitoring the signal from a low water cut-off (LWCO); electronics for opening and closing a water path into said boiler; and a processor having a clock source; wherein when said electronics for monitoring detect a low water signal from said LWCO, said processor initiates opening of said water path to allow water to flow into said boiler; wherein which said processor determines when said boiler has sufficient water to close said water path to said boiler, said electronics close said water path; wherein said processor adds the amount of water added between the instance of opening and closing the water path to a value representative of the water added for a sub-period of time determined by said clock source; wherein at the end of said sub-period of time, said processor writes said value for said sub-period to a memory; and wherein said processor computes the total amount of water added in a period by adding the values for the immediately prior sub-periods forming that period; and wherein if said amount is over a preset limit, triggers an alarm condition.

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Referenced By

Document NumberAssigneeInventorsIssue/Pub Date
US8069723 Richard D. Wells et al. Dec 2011

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