GB2417768A - Electro-mechanical control of hot water from a boiler or the like - Google Patents
Electro-mechanical control of hot water from a boiler or the like Download PDFInfo
- Publication number
- GB2417768A GB2417768A GB0512783A GB0512783A GB2417768A GB 2417768 A GB2417768 A GB 2417768A GB 0512783 A GB0512783 A GB 0512783A GB 0512783 A GB0512783 A GB 0512783A GB 2417768 A GB2417768 A GB 2417768A
- Authority
- GB
- United Kingdom
- Prior art keywords
- control unit
- hot water
- boiler
- item
- electronic control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 230000003213 activating effect Effects 0.000 claims 1
- 230000001419 dependent effect Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/025—Actuating devices; Operating means; Releasing devices electric; magnetic actuated by thermo-electric means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/20—Control of fluid heaters characterised by control inputs
- F24H15/212—Temperature of the water
- F24H15/219—Temperature of the water after heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
- F24H15/305—Control of valves
- F24H15/31—Control of valves of valves having only one inlet port and one outlet port, e.g. flow rate regulating valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/40—Control of fluid heaters characterised by the type of controllers
- F24H15/414—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
- G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D7/00—Control of flow
- G05D7/06—Control of flow characterised by the use of electric means
- G05D7/0617—Control of flow characterised by the use of electric means specially adapted for fluid materials
- G05D7/0629—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means
- G05D7/0635—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by action on throttling means
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Fluid Mechanics (AREA)
- Computer Hardware Design (AREA)
- Automation & Control Theory (AREA)
- General Physics & Mathematics (AREA)
- Magnetically Actuated Valves (AREA)
- Control Of Temperature (AREA)
Abstract
There is disclosed a means of controlling the flow of hot water at a requisite temperature from a boiler or the like, by having the outlet pipe 3 connected to an electrically controlled solenoid valve 4, having terminals for electrical connection to a control unit 6. The control unit 6 with a built-in transformer (not shown) supplies a specified voltage to a circuit board and electronic components, which provides the necessary electric impulses to operate the valve 4 both 'opening' and 'closing' the valve at the desired water temperature.
Description
24 1 7768
ELECTRO-MECHANICAL CONTROL OF HOT WATER
FLOW FROM A BOILER OR THE LIKE.
The invention relates to controlling the flow of 'loot Water' by an Electro- Mechanical means from a boiler before releasing same for flow output By present conventional means the hot water available in both commercial and domestic systems is sourced from boilers of varying types and sizes, (many of which are commercially available).
Other present conventional means is by hot water cylinders of which two main types are available, namely that of direct and indirect systems.
Both direct and indirect have the water within the copper cylinder Ted by cold water supply to the lower region of the cylinder and the hot water feed - outlet at the top (usually with an expansion pipe, t'or pressure relief) In both cases the initial cold water within the cylinder is heated to a higher temperature by two of the following methods.- a) An electrical thermostat heater.
b) A hot water coil heated from an external boiler.
Any of the aforesaid systems will allow draw-off of hot water via 'Taps' or the like, allowing a certain volume of relatively cool water to flow before hot water becomes present, volume will vary dependent upon the number of draw-offpoints in use.
An electronic control unit (E.C U.) directly connected to a solenoid valve which is assembled on the hot water pipe from the boiler or other source of water will recognise the water temperature and allow response at the (E.C.U.) To activate the solenoid valve in turn 'opening' the valve and allowing hot water to flow to draw-off points. At the requisite temperature.
By way of the following description and drawings the invention seeks to overcome this problem.
Fig I Diagrammatic arrangement of system Fig 2 Diagramatic view of circuit.
Item 3 Fig l is the hot water 'outlet' pipe from the boiler or source connected to an electrically controlled solenoid valve item 4, (which are commercial available) The electrical connection terminals are represented by item 5 Fig 1 The terminals are connected via specified rated wires/cable to an electrical control unit 6 Fig l (and for the remainder of this description will be depicted by the abbreviation EC.U letters.
Item 8 Fig 2 is a typical circuit which will provide the necessary functional sequencing required to the 'input' terminals item 5 Fig l of the solenoid valve 4 Fig's I and2.
Item 9 Fig 2 is the positive (+ ve) side ofthe circuit with a negative (ve) side 10 For this description only a l 2 volt supply is used compatible with the 'input' electrical requirement of the selected solenoid valve item 4 Fig 's l and 2.
The following description of the circuit item 8 Fig 2 will itemise the various electronic components by name only as the electrical values will vary dependent on the pre selection of the solenoid valve item 4 Fig's l and 2 as the electrical 'input' supply can vary dependent on the manufacturer, also that of the design criteria.
Item 11 Fig's 1 and 2 is a thermistor' having connections within the circuit board (not shown) to a series of resistors items 12, 13 and 14 connected to the 'input' side ofthe operational amplifier' (POP AMP) item 15 Fig 2.
The 'output' side ofthe POP AMP' item 15 Fig 2 is connected via a Diode item 15a, (to prevent current flow back to the POP AMP' item 15) to a series of resistors items l 6, 18 and 19 (resistor item 19 is of the variable type, namely that of a potentiometer), the capacitor- condenser item 17 ensures stabalized voltage as required. To the input' of a secondary POP-AMP' item 20 Fig 2.
The 'output' side ofthe secondary POP-AMP' item 20 Fig 2 is connected to a metal oxide semi-conductor field effect transistor (M.O.S.F.E T) item 21., with electrical output' connection to the 'input' terminals ofthe solenoid valve item 4 Fig's 1 and 2.
The aforesaid electric circuit and components assembled on a compatible circuit board housed within a specified case/housing unit with a 'transformer' (not shown) providing the necessary voltage required by the design specification. The E.C.U. will have a cable for 'input' electrical supply compatible to the 'transformers' requirement.' and final connection made within either the 'boiler' casing unit or that of alternative electrical supply source.
A summary and circuit operation (fig 2) will now be described.- (For this description only the input voltage from the transformer to the circuit is 12 volts). - 2
As the temperature of the water increases, the resistance in the thermistor will reduce.
This reduction in temperature will cause the Voltage at Vl to be lower than V2. V2 will be greater than V1 when the temperature is above the desired temperature (40 degrees C) Since the op-amp, with no feedback, has an extremely high gain, the output voltage ofthe op-amp will switch high.
Condenser item l 7 Fig 2 is then charged to V3 in around 1 second, causing the second op-amp to switch its output high With the output of the second op-amp high, the gate threshold voltage of the MOSFET is exceeded, allowing current to flow through the solenoid, opening the valve and releasing the full flow of hot water from the outlet pipe item 7 Fig 1.
When water flow is stopped, the temperature will gradually reduce, as will that of the thermistor Once below the threshold temperature, the first op-amp output switches low condenser item 17 Fig 2 then discharges (through the adjacent resistor), causing the second op-amp to switch to low, turning off the current to the solenoid, and closing the valve This will take around two minutes to occur The small time lag in opening and the longer delay in closing the solenoid should eliminate any 'bouncing ofthe valve around the operating temperature.
Claims (4)
- ]. An electronic control unit directly connected to a solenoid valve, which is assembled on the hot Hater 'outlet pipe from the boiler or other source of water supply, will recognise the water temperature and allow response at the electronic control unit, activating the solenoid valve and allowing hot water to flow at the requisite temperature.
- 2 An electronic control unit as in claim 1, having a built-in transformer for supply of the specified voltage to satisfy the design criteria of the circuit and electronic components.
- 3. An electronic control unit as in claims 1 and 2 having a 'time delay' designed within the circuit to provide delay in 'opening' the solenoid valve, this prevents bouncing of the valve at the operating temperature
- 4. An electronic control unit as in claims I - 3 and substantially as herein before described with reference to the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GBGB0414629.6A GB0414629D0 (en) | 2004-06-30 | 2004-06-30 | Electrical control of the temperature of hot water from a boiler or the like |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB0512783D0 GB0512783D0 (en) | 2005-07-27 |
| GB2417768A true GB2417768A (en) | 2006-03-08 |
| GB2417768B GB2417768B (en) | 2008-07-16 |
Family
ID=32843299
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GBGB0414629.6A Ceased GB0414629D0 (en) | 2004-06-30 | 2004-06-30 | Electrical control of the temperature of hot water from a boiler or the like |
| GB0512783A Expired - Fee Related GB2417768B (en) | 2004-06-30 | 2005-06-23 | Electro-mechanical control of hot water flow from a boiler |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GBGB0414629.6A Ceased GB0414629D0 (en) | 2004-06-30 | 2004-06-30 | Electrical control of the temperature of hot water from a boiler or the like |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB0414629D0 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2464095A (en) * | 2008-10-01 | 2010-04-07 | Abdool Raheed Moedeen | Thermostatic heating control system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5577660A (en) * | 1994-12-09 | 1996-11-26 | Hansen; K. Gene | Temperature sensing automatic faucet |
| JPH10103536A (en) * | 1996-09-27 | 1998-04-21 | Matsushita Electric Works Ltd | Hot and cold water combination supplyer |
| US6676024B1 (en) * | 2002-09-05 | 2004-01-13 | Masco Corporation | Thermostatic valve with electronic control |
-
2004
- 2004-06-30 GB GBGB0414629.6A patent/GB0414629D0/en not_active Ceased
-
2005
- 2005-06-23 GB GB0512783A patent/GB2417768B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5577660A (en) * | 1994-12-09 | 1996-11-26 | Hansen; K. Gene | Temperature sensing automatic faucet |
| JPH10103536A (en) * | 1996-09-27 | 1998-04-21 | Matsushita Electric Works Ltd | Hot and cold water combination supplyer |
| US6676024B1 (en) * | 2002-09-05 | 2004-01-13 | Masco Corporation | Thermostatic valve with electronic control |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2464095A (en) * | 2008-10-01 | 2010-04-07 | Abdool Raheed Moedeen | Thermostatic heating control system |
| GB2464095B (en) * | 2008-10-01 | 2012-07-04 | Abdool Raheed Moedeen | Thermostatic heating control system, apparatus and method |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0512783D0 (en) | 2005-07-27 |
| GB0414629D0 (en) | 2004-08-04 |
| GB2417768B (en) | 2008-07-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6053416A (en) | Automatic hydronic zone valve and electric controls therefor | |
| US5479558A (en) | Flow-through tankless water heater with flow switch and heater control system | |
| US4567350A (en) | Compact high flow rate electric instantaneous water heater | |
| JPS6122431B2 (en) | ||
| EP1026020B1 (en) | Electric heating device for a vehicle | |
| US10948191B2 (en) | Magnet-thermocouple system for fail-safe supply of gas to burners or the like | |
| US8539978B2 (en) | Gas valve unit with bypass flow | |
| US4485966A (en) | Pulsation device for a heating or cooling unit | |
| GB2417768A (en) | Electro-mechanical control of hot water from a boiler or the like | |
| GB2150716A (en) | Electric water heaters | |
| US4337891A (en) | Electric control device for a central heating boiler | |
| US11908618B2 (en) | Thermoelectric assembly for powering electromagnetic valves of a cooking appliance | |
| GB2375592A (en) | Electric shower with power consumption limit | |
| US2932456A (en) | Temperature control system and compensated thermostat therefor | |
| EP3839352A1 (en) | Thermoelectric assembly for powering a plurality of electromagnetic valves of a cooking appliance | |
| CN105065726A (en) | Instantaneous constant-temperature output device with cold and hot water mixing function | |
| CN204828797U (en) | Instantaneous constant temperature output device of cold water mixing | |
| GB2210215A (en) | Off period-timer | |
| JP6530661B2 (en) | Solenoid valve device | |
| NL2020522A (en) | Improved satellite plumbing unit | |
| GB2263965A (en) | Water heater | |
| AU3803797A (en) | Circuit protection arrangements | |
| CN213145473U (en) | Near-end induction electronic tap | |
| CN211556865U (en) | Main/standby circuit switching device | |
| GB2086087A (en) | Space heating control device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20130623 |