IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0472619
(1999-12-27)
|
등록번호 |
US-7730935
(2010-06-29)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
10 인용 특허 :
6 |
초록
▼
A control system for controlling delivery of either heated or cooled water over a common water line to a plurality of heat exchangers. The control system includes a hydronic system controller which polls the heating or cooling demands of zone controllers controlling the respective delivery of water
A control system for controlling delivery of either heated or cooled water over a common water line to a plurality of heat exchangers. The control system includes a hydronic system controller which polls the heating or cooling demands of zone controllers controlling the respective delivery of water to the individual heat exchangers. The hydronic system controller is operative to implement a changeover between delivery of heated water to delivery cooled water or vice versa. The implemented changeover preferably includes checking the temperature of the water being returned to the source or sources for heating or cooling the water as well as defining a changeover time period which must occur in the event that the temperature of the water in the return line is not within a predefined range.
대표청구항
▼
What is claimed is: 1. A control system for controlling a hydronic system having both a heating source capable of heating water to be delivered over a piping line to a plurality of heat exchangers and a cooling source capable of cooling water to be delivered over the same piping line to the plurali
What is claimed is: 1. A control system for controlling a hydronic system having both a heating source capable of heating water to be delivered over a piping line to a plurality of heat exchangers and a cooling source capable of cooling water to be delivered over the same piping line to the plurality of heat exchangers, said control system comprising: a plurality of zone controllers, each zone controller connected to a respective heat exchanger so as to control the delivery of water over the piping line to the respective heat exchanger, each zone controller being operative to generate a demand signal corresponding to a request for one of heated water, cooled water or no water; a hydronic temperature sensor disposed in the piping line and configured to generate a sensed water temperature; and a hydronic system controller in communication with each of said zone controllers and operatively coupled to the hydronic temperature sensor, said hydronic system controller being operative to periodically receive the demand signal from each zone controller determine whether a predominance of the demand signals are requests for heating or cooling, and to activate, only if the sensed water temperature of the circulating water is within a predefined temperature range, either the heating source when a predominance of demand signals are for heating or the cooling source when the predominance of demand signals are for cooling. 2. The control system of claim 1 wherein the piping line includes a return section fluidly communicating from outlets of each heat exchanger to inlets of the heating source and cooling source, and in which the temperature sensor is disposed in the piping line return section. 3. The control system of claim 1 in which at least one of the heating source and cooling source is a currently active source while the other of the heating source and cooling source is a currently inactive source, in which the hydronic system controller is operative to deactivate the currently active source in response to a predominance of demand signals requesting operation of the currently inactive source, and in which the hydronic system controller is further operative to activate the currently inactive source only after a predetermined period of time has elapsed. 4. The control system of claim 3 wherein said hydronic system controller is further operative to activate the currently inactive source before the predetermined period of time has elapsed if the sensed water temperature is within a predefined temperature range. 5. The control system of claim 4 wherein the piping line includes a return section fluidly communicating from outlets of each heat exchanger to inlets of the heating source and cooling source, and in which the temperature sensor is disposed in the piping line return section. 6. The control system of claim 1, in which at least one of the heating source and cooling source is a currently active source while the other of the heating source and cooling source is a currently inactive source, and wherein said hydronic system controller is operative to deactivate the currently active source if a predetermined run time has elapsed for the currently active source. 7. The control system of claim 3 wherein said hydronic system controller is operative to periodically determine whether all zone controllers are demanding no conditioned water, said hydronic system controller being operative to thereafter maintain the currently active source in an active state and to furthermore transmit a message to the zone controllers indicating that the currently active source will continue to provide water over the pipe line to the heat exchangers controlled by the zone controllers. 8. The control system of claim 1 wherein said hydronic system controller is operative to send a message to each of the zone controllers indicating whether heated water or cooled water is to be provided to the heat exchangers and wherein each of said zone controllers is operative to control the delivery of water to the associated heat exchanger depending on whether the zone controller demand signal corresponds to a request for heated water, cooled water or no water. 9. A hydronic system for use in a space having multiple zones, the hydronic system comprising: a heat exchanger disposed in at least three of the zones; a heating source capable of heating water; a cooling source capable of cooling water; a piping line fluidly communicating between both the heating source and the cooling source and each of the heat exchangers; a zone controller operatively coupled to each heat exchanger, each zone controller being operable to generate a demand signal in response to at least one sensed parameter in the zone associated with the zone controller, wherein the demand signal corresponds to a request for one of heated water, cooled water, or no water; a hydronic temperature sensor disposed in the piping line and configured to generate a sensed water temperature; and a hydronic system controller operatively coupled to each zone controller and the hydronic temperature sensor, the hydronic system controller being operative to: periodically receive the demand signal from each zone controller, determine whether a predominance of the demand signals are requests for heating or cooling, and activate, only if the sensed water temperature is within a predefined temperature range, either the heating source when the predominance of the demand signals are for heating or the cooling source when the predominance of the demand signals are for cooling. 10. The hydronic system of claim 9, in which the piping line includes a return section fluidly communicating from outlets of each heat exchanger to inlets of the heating source and cooling source, and in which the temperature sensor is disposed in the piping line return section. 11. The hydronic system of claim 9, in which at least one of the heating source and cooling source is a currently active source while the other of the heating source and cooling source is a currently inactive source, in which the hydronic system controller is operative to deactivate the currently active source in response to a predominance of demand signals requesting operation of the currently inactive source, and in which the hydronic system controller is further operative to activate the currently inactive source only after a predetermined period of time has elapsed. 12. The hydronic system of claim 11, in which the hydronic controller is further operative to activate the currently inactive source before the predetermined period of time has elapsed if the sensed water temperature is within a predefined temperature range. 13. The hydronic system of claim 12, in which the piping line includes a return section fluidly communicating from outlets of each heat exchanger to inlets of the heating source and cooling source, and in which the temperature sensor is disposed in the piping line return section. 14. The hydronic system of claim 9, in which at least one of the heating source and cooling source is a currently active source while the other of the heating source and cooling source is a currently inactive source, and in which the hydronic system controller is operative to deactivate the currently active source if a predetermined run time has elapsed for the currently active source. 15. The hydronic system of claim 11, in which the hydronic system controller is operative to send a message to each of the zone controllers indicating whether heated water or cooled water is to be provided to the heat exchangers, and wherein each of the zone controllers is operative to control delivery of water to the associated heat exchanger depending on whether the zone controller demand signal corresponds to a request for heated water, cooled water, or no water.
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