Automatic temperature and humidity regulation – Combined heater and apartment controlled
Patent
1996-10-04
1997-12-16
Bennett, Henry A.
Automatic temperature and humidity regulation
Combined heater and apartment controlled
236 20R, 237 8R, F23N 108
Patent
active
056975511
DESCRIPTION:
BRIEF SUMMARY
This application is based on International Application PCT/GB95/02941, having international filing date of Dec. 15, 1995, and a priority date of Dec. 23, 1994.
The invention relates to a heating system of the type used for supplying a number of separate flats, apartments or offices in a building from a common boiler plant. Each apartment may be billed separately for the heat utilized.
According to the invention there is provided a heating system having a boiler for supplying heated water to a number of apartments, offices or the like and each apartment or the like including (a) first sensor means for sensing the current water temperature in that respective apartment; (b) second sensor means for sensing the arriving water temperature to that apartment; (c) first control means for controlling the incoming water to allow this to pass for utilization only when the temperature thereof is above a selected temperature for that apartment; and (d) second control means for returning the incoming water without utilization when the temperature thereof is below a selected temperature for that apartment and wherein each apartment includes a water store for receiving hot water from the boiler, the first sensor means sensing the temperature within the water store.
Further according to the invention there is provided a method of heating a number of apartments, offices or the like from a common boiler, the method including: sensing the current water temperature in a water store in a respective apartment; sensing the incoming water temperature received by that apartment controlling the incoming water in that apartment to allow this to pass for utilization only when the temperature thereof is above a selected temperature; and controlling in that apartment the incoming water so as to return it without utilization when the temperature thereof is below a selected temperature.
The invention will now be described by way of example with reference to the accompanying drawings in which:
FIG. 1 shows a system for heating a number of apartments using a common boiler;
FIG. 2 shows a modified system more able to cope with demand requirements; and
FIG. 3 shows an embodiment of the electronic controller of FIG. 2 in more detail.
FIG. 1 shows a system including a number of heating arrangements 10 connected to a common boiler 12 via pipes 13, 14. Although only two arrangements are shown, in practice the number utilized will be equal to the number of apartments in the building, e.g. 40.
Each arrangement 10 includes a hot water store 15 with associated thermostat S1. Hot tap water can be drawn via outlet 16 and water for radiators 17 are provided via pipes 19, 20. A meter 21 is provided on the return pipe 22 which also includes closure valve 23.
The hot water from boiler 12 is received by each apartment and the hot water store 15 therein will contain a reserve of this hot water for heating the tap water and radiators.
Thermostat S1 will be set to a desired temperature and will indicate to the boiler when temperature in the store has fallen so that the common supply will be heated further. The hot water for the taps will typically be heated within the store via coils from a cold source to avoid utilizing the water from the boiler itself. The radiator water is circulated and passes back to the hot water store. The meter 21 measures the water circulation or heat or the user is charged accordingly.
Problems with levels of demand can cause operational problems in that if the boiler cannot cope with demand, or if the water in the pipes 13 and 14 is cold, cool water could be circulated through the apartment system can be paid for. Also, if the water store temperature is relatively high this heat could be `robbed` by the boiler water. To avoid these problems, it may be necessary to keep the boiler water temperature and the water temperature in pipes 13 and 14 artificially high so that on many occasions heat is being wasted when demand is low as the hot water will be continually circulating in the pipework (i.e. pipes 13 and 14 would be joined at the e
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Bennett Henry A.
Wilson Gregory
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