Fuel Economizer Improvements

• US 20100025489A1
• Filed: 07/24/2009
• Published: 02/04/2010
• Est. Priority Date: 07/29/2008
• Status: Active Grant

• Current Assignee: James Edward Sambrook
• Original Assignee: James Edward Sambrook
• Inventors: Sambrook, James Edward
• Granted Patent: US 8,201,750 B2
• Time in Patent Office: Days
• US Class Current: 237/8.A
• CPC Class Codes: F24D 19/1009 for central heating
• CPC Class Codes: F24D 2200/04 Gas or oil fired boiler
• CPC Class Codes: F24H 15/156 Reducing the quantity of energy consumed; Increasing efficiency
• CPC Class Codes: F24H 15/174 Supplying heated water with desired temperature or desired range of temperature
• CPC Class Codes: F24H 15/254 Room temperature
• CPC Class Codes: F24H 15/335 Control of pumps, e.g. on-off control control of compressors of heat pumps F24H15/38
• CPC Class Codes: F24H 15/36 of burners
• CPC Class Codes: F24H 15/486 using timers

Abstract

An electronic circuit for a hot water heating system an override thermostat; a timer operable to deactivate and reactivate the burner while a room thermostat is calling for heat; a differential temperature switch configured to disconnect the electrical supply to the water pump when the difference in temperature between the water at the boiler inlet and the water at the boiler outlet falls below an adjustable set point; and, a temperature switch configured to prevent operability of the timer until the temperature of the water at the burner outlet rises above an adjustable set point.

Claims

1. An electronic circuit to conserve fuel consumption and reduce carbon dioxide emissions in a heating system that comprises a burner that heats water, the boiler comprising a burner and a heat exchanger with a water inlet and a water outlet;

a water pump powered by an electrical supply; and

, a room thermostat comprising a setting for a lower temperature limit and an upper temperature limit wherein the room thermostat is operable to activate the burner upon detecting a room temperature at or below the lower temperature limit and deactivate the burner upon detecting a room temperature at or above the upper temperature limit, the electronic circuit comprising;

an override thermostat comprising a setting for a lower temperature limit and an upper temperature limit below those of the room thermostat and operable to activate continuous operation of the burner until the upper temperature limit of the override thermostat is reached when the indoor temperature falls below the lower temperature limit of the room thermostat;

a timer operable to deactivate and reactivate the burner while the room thermostat is calling for heat;

a differential temperature switch configured to disconnect the electrical supply to the water pump when the difference in water temperature between the water inlet of the heat exchanger and the water outlet of the heat exchanger falls below an adjustable set point; and

,

a temperature switch configured to prevent operability of the timer until the temperature of the water at the water outlet of the heat exchanger rises above an adjustable set point.

2. The electronic circuit of claim 1 wherein the timer is operable to deactivate and reactivate the burner by interrupting and restoring electrical supply to a circuit controlling the burner.