IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
|
출원번호 |
US-0463328
(1983-02-02)
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발명자
/ 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
5 인용 특허 :
6 |
초록
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Control circuits are provided for a heat exchange unit including environment responsive means placed in the general area of the heat exchange unit's heat exchanger or of the associated heat distribution network or return system. The environment responsive means is connected in series between the hea
Control circuits are provided for a heat exchange unit including environment responsive means placed in the general area of the heat exchange unit's heat exchanger or of the associated heat distribution network or return system. The environment responsive means is connected in series between the heat exchange unit's main control switch, such as a thermostat, and the fuel valve which controls the flow of fuel to the unit's burner. The environment responsive means may be either independent of, or connected in parallel with a heat circulator if any, associated with the unit's heat exchanger. The control circuits of the present invention control the action of the heat exchange units fuel valve to create an intermittent heating flame in response to environmental changes at the heat exchanger, heat distribution network or return system during each heat demand cycle. This conserves fuel and energy by intermittently terminating the flow of fuel, and thus the burning of fuel, during each heat demand cycle while continuing to utilize and distribute heat stored in the heat exchanger during non-fuel burning periods of each heat demand cycle.
대표청구항
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1. A heat exchange system comprising: a thermostat controller for initiating and terminating a heat demand cycle; a burner directly fluidly coupled to a fuel valve, said fuel valve being operable in the open position to provide a constant fuel supply to said burner and being operable in the clos
1. A heat exchange system comprising: a thermostat controller for initiating and terminating a heat demand cycle; a burner directly fluidly coupled to a fuel valve, said fuel valve being operable in the open position to provide a constant fuel supply to said burner and being operable in the closed position to prevent any fuel supply to said burner, said fuel valve being responsive to a heat demand signal from said controller; a heat exchanger proximate the burner; a heat duct distribution network arranged and adapted to direct heated fluid from said heat exchanger to a region to be heated; and a temperature responsive switch electrically connected in series with said controller and said fuel valve, said switch arranged and adapted to sense the temperature at a chosen position in said heat duct distribution network remote from said heat exchanger to prevent the application of said heat demand signal to close said fuel valve when the temperature at said chosen position rises above a first temperature, and to permit the reapplication of said heat demand signal to open said fuel valve when the temperature at said chosen position drops below a second temperature. 2. The heat exchange system of claim 1 further comprising: a fluid circulator; and a normally open fluid circulator switch, responsive to the temperature of said heat exchanger and operably coupled to said fluid circulator, adapted to close and activate said circulator when the temperature of said heat exchanger rises above a certain temperature. 3. The heat exchange system of claim 2 further comprising a high temperature safety switch arranged and adapted to close said fuel valve to halt the delivery of fuel to said burner when the temperature at said heat exchanger is above a chosen temperature. 4. A control system for use with heat exchange systems of the type including a thermostat controller for initiating and terminating a heat demand cycle, a burner directly coupled to a fuel valve, said fuel valve and controller being operably connected along a control line, said fuel valve being operable in the open position to provide a constant fuel supply to said burner and being operable in the closed position to prevent any fuel supply to said burner, said fuel valve being responsive to a heat demand signal transmitted from said controller to said fuel valve along said control line, a heat exchanger proximate said burner, a heat duct distribution network arranged and adapted to direct heated fluid from said heat exchanger to a region to be heated, the control system comprising a temperature responsive switch electrically connected along said control line in series with the controller and fuel valve, said switch arranged and adapted to sense the temperature at a chosen position in said heat duct distribution network remote from said heat exchanger to prevent the application of said heat demand signal to close said said fuel valve when the temperature at said chosen position rises above a first temperature, and to permit the reapplication of said heat demand signal to open said fuel valve when the temperature at the chosen position drops below a second temperature. 5. The control system of claim 4 further comprising: a fluid circulator adapted to force a fluid past said heat exchanger; and a normally open fluid circulator switch, responsive to the temperature at said heat exchanger and operably coupled to said fluid circulator, adapted to close and activate the circulator when the temperature of said heat exchanger rises above a certain temperature. 6. A method for controlling the operation of a heating system comprising the following steps: initiating and terminating a heat demand signal according to the temperature within a region to be heated; directing the heat demand signal to a fuel valve; actuating said fuel valve upon receipt of said heat demand signal from a thermostatic controller; providing a burner with fuel directly from the actuated fuel valve; burning the provided fuel at said burner: heating a heat exchanger, located proximate said burner, with the burning fuel; circulating a heating fluid past said heat exchanger thereby removing heat from said heat exchanger; directing said heating fluid from said heat exchanger, through a heat duct distribution network and to the region to be heated; monitoring the temperature of said heating fluid in said heat duct distribution network at a position remote from said heat exchanger; interrupting said heat demand signal to close said fuel valve when the temperature at said position remote rises above a first temperature: and permitting said heat demand signal to be reapplied to open said fuel valve when the temperature at said remote position drops below a second temperature. 7. The method of claim 6 wherein the circulating step includes the steps of: blowing air past said heat exchanger with a blower; sensing the temperature at said heat exchanger; and actuating said blower when the temperature at said heat exchanger rises above a certain temperature. 8. A flame control system for use with heat exchange systems of the type including a controller for initiating and terminating a heat demand cycle, a burner directly coupled to a fuel valve, said fuel valve being operable in the open position to provide a constant fuel supply to said burner and being operable in the closed position to prevent any fuel supply to said burner, said fuel valve being responsive to a heat demand signal from said controller, a heat exchanger proximate said burner, a fluid circulator arranged and adapted to remove heat from said heat exchanger, and a normally open fluid circulator switch, responsive to the temperature of the heat exchanger and operably coupled to said fluid circulator, adapted to close and activate said circulator when the temperature of said heat exchanger rises above a certain temperature, the control system comprising: a normally closed relay switch mounted in series with said controller and operably coupled to a relay coil, said relay coil and relay switch arranged and adapted so energization of said relay coil causes said relay switch to open; means, operably coupled to the fluid circulator switch, for energizing the relay coil when said fluid circulator is energized; and a temperature responsive switch means, adapted to sense said heat exchanger temperature, for permitting the energizing of the relay coil when the temperature of said heat exchanger rises above a first temperature so to prevent the application at said heat demand signal to close said fuel valve, and for preventing the energizing of said relay coil when the temperature at said heat exchanger drops below a second temperature to permit the application of said heat demand signal to open said fuel valve. 9. The flame control system of claim 8 wherein said switch means includes a switch connected in series with said relay coil and adapted to close when the temperature at said heat exchanger rises above said first temperature. 10. A flame control system for use with heat exchange systems of the type including a controller for initiating and terminating a heat demand cycle, a burner directly coupled to a fuel valve, said fuel valve being operable in the open position to provide a constant fuel supply to said burner and being operable in the closed position to prevent any fuel supply to said burner, said fuel valve being responsive to a heat demand signal from said controller, a heat exchanger proximate said burner, a fluid circulator arranged and adapted to remove heat from said heat exchanger, and a normally open fluid circulator switch, responsive to the temperature of said heat exchanger and operably coupled to said fluid circulator, adapted to close and activate said circulator when the temperature of said heat exchanger rises above a certain temperature, said control system comprising: a temperature responsive switch means, placed in series with said controller and said fuel valve, for preventing the application of said heat demand signal to close said fuel valve when the temperature of said heat exchanger rises above a first temperature, and for permitting the reapplication of said heat demand signal to open said fuel valve when the temperature of said heat exchanger drops below a second temperature; a normally closed third switch placed in parallel across said switch means; and means for opening said third switch when said fluid circulator switch is closed so that said heat demand signal from said controller to said fuel valve cannot be disrupted until after said fluid circulator has been activated. 11. A flame control system for use with heat exchange systems of the type including a controller for initiating and terminating a heat demand cycle, a burner directly coupled to a fuel valve, said fuel valve being operable in the open position to provide a constant fuel supply to said burner and being operable in the closed position to prevent any fuel supply to said burner, said fuel valve being responsive to a heat demand signal from said controller, a heat exchanger proximate the burner, a fluid circulator arranged and adapted to remove heat from said heat exchanger, and a normally open fluid circulator switch, responsive to the temperature of said heat exchanger and operably coupled to said fluid circulator, adapted to close and activate said circulator when the temperature of said heat exchanger rises above a certain temperature, the control system comprising: a temperature responsive switch means, placed in series with said controller and said fuel valve, for preventing the application of said heat demand signal to close said fuel valve when the temperature of said heat exchanger rises above first temperature, and for permitting the reapplication of said heat demand signal to open said fuel valve when the temperature of said heat exchanger drops below a second temperature: and an environment responsive switch placed in parallel across said switch means and positioned remote from said heat exchanger, said environment responsive switch arranged and adapted to open sensing actuation of said fluid circulator to permit said switch means to control the cycling on and off of said heat exchanger during a heat demand cycle. 12. The control system of claim 11 wherein said environment responsive switch is responsive to temperature.
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