GB2042709A - Water Heating Installation and Circuit Arrangement Therefor - Google Patents
Water Heating Installation and Circuit Arrangement Therefor Download PDFInfo
- Publication number
- GB2042709A GB2042709A GB7938935A GB7938935A GB2042709A GB 2042709 A GB2042709 A GB 2042709A GB 7938935 A GB7938935 A GB 7938935A GB 7938935 A GB7938935 A GB 7938935A GB 2042709 A GB2042709 A GB 2042709A
- Authority
- GB
- United Kingdom
- Prior art keywords
- temperature
- boiler
- water
- circuit arrangement
- delivery conduit
- 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 48
- 238000010438 heat treatment Methods 0.000 title claims description 26
- 238000009434 installation Methods 0.000 title claims description 19
- 230000001105 regulatory effect Effects 0.000 claims abstract description 6
- 239000012080 ambient air Substances 0.000 claims abstract description 4
- 230000005855 radiation Effects 0.000 description 3
- 239000003570 air Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- 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
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
- F24D19/1024—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves a multiple way valve
- F24D19/1033—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves a multiple way valve motor operated
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Steam Or Hot-Water Central Heating Systems (AREA)
- Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The circuit arrangement has a control unit (6) to control the delivery temperature of the water in dependence on the ambient air temperature; one or more thermostats (9) sensitive to the temperature of the water in the delivery conduit (14) leading from the boiler (1) and adjustable to a pre-set temperature which varies among the thermostats when more than one is present so that they are activated successively across a temperature range, and a temperature controller, to regulate the temperature of the boiler (1) comprising two or more stages (3, 4) each of which is adapted to regulate the boiler temperature over a predetermined temperature range which varies from one stage to another. When the pre-set temperature at one of the thermostats (9) is exceeded or no longer attained by the temperature of the water in the delivery conduit (14) as controlled by the control unit (6) the stage (3) regulating the temperature of the boiler (1) is switched to one (4) regulating the boiler at a higher or lower temperature range respectively. The temperature of the boiler (1) can thus correspond more closely to the demand for hot water. <IMAGE>
Description
SPECIFICATION
Water Heating Installation and Circuit
Arrangement Therefor
The present invention relates to a circuit arrangement for a water heating installation and to a water heating installation fitted therewith.
Hot-water heating installations controlled according to the weather are already known which operate with a mixer and whose control unit, associated with a heating system boiler, can be set at a constant level for example either to 900C or 600C. The night lowering of such a water heating installation can be carried out by means of a central control unit with an integrated time switch. The mixer determines the flow or delivery temperature of the water in the delivery conduit according to the outside temperature which is passed to the central control unit by way of an outside temperature pickup. In circuit arrangements or hot-water heating installations of this kind there can be considerable radiation losses due to the high boiler temperature and considerable cooling-down losses, each of which is disadvantageous.
It is an object of the present invention to adapt the boiler water temperature to the actual hot water requirement.
According to the present invention there is provided a circuit arrangement for a water heating installation having a heating boiler with a delivery conduit leading therefrom and a multi-way mixer included in the delivery conduit, the circuit arrangement including: (i) a control unit adapted to control the delivery temperature of the water in dependence on the ambient air temperature;
(ii) one or more thermostats each of which is sensitive to the temperature of the water in the delivery conduit and is adjustable to a pre-set temperature, the said pre-set temperature varying among the the thermostats when more than one is present so that the thermostats are activated successively across a temperature range; and
(iii) a temperature controller adapted to regulate the temperature of the boiler, the controller including two or more stages each of which is adapted to regulate the boiler temperature over a predetermined temperature range which varies from one stage to another, the arrangement being such that when the pre-set temperature at one of the thermostats is exceeded or no longer attained by the temperature of the water in the delivery conduit as controlled by the control unit the stage regulating the temperature of the boiler is switched to one regulating the boiler at a higher or lower temperature range respectively.
The circuit arrangement of the present invention can thus adapt the boiler water temperature to the demand for hot water at any one time. In addition considerable other advantages can be obtained by the present invention. For example switching differences of the control unit need no longer be noticeable in the delivery conduit, or are at least greatly reduced, as control of temperature is effected by means of the mixer. Moreover radiation and cooling-down losses can be substantially reduced.
When using a multi-stage boiler controller, in particular in conjunction with a plurality of delivery line thermostats, continuously variable running of the boiler is possible, so that optimum conditions can be achieved.
In operation the control unit controls the delivery temperature of the heating installation according to the ambient air temperature, which may be the outside air temperature. The boiler water temperature is held for example by a first controller stage to an adjustable temperature range of e.g. 500 to 600 C. If the delivery temperature of the heating installation exceeds a specific value settable at one of the delivery thermostats, the latter closes and electrically bypasses the first controller stage of the boiler.
The boiler water temperature is then monitored by the next controller stage and held at an adjustable higher temperature range, for example 800 to 900C; The present invention can thus ensure that the boiler water temperature is only run at a higher temperature level when the need exists. Radiation and cooling down losses from the boiler can thus be kept to a minimum. When the delivery temperature at the delivery thermostat falls below the set value, the electrical bypassing action is discontinued and the nextlower controller stage monitors the boiler temperature at its preset temperature range.
When on the other hand there is a low demand such as during night hours in by far the greater portion of the heating period the first controller stage can monitor the boiler water temperature.
As a rule, a relatively low delivery temperature is used during lower-level running periods and can be met by use of the first controller stage only.
Preferably the control unit includes a time switch so that the stage of the temperature controller which regulates the boiler temperature at the lower or lowest predetermined temperature range is arranged to regulate the boiler temperature during times of low demand such as at night
Whilst water is dispensed from or charged to the boiler the stage of the temperature controller which regulates the boiler temperature at the higher or highest predetermined temperature range is preferably arranged to regulate the boiler temperature.For example the priority circuit of a domestic water heater is connected so that the first (lower) controller stage of the heating boiler is electrically bypassed so that the boiler, when there is dispensing from or charging to the domestic water heater, is operated by the nexthigher controller stage or a still higher controller stage with a boiler water temperature of e.g. 800 to 900C.
The present invention extends to a water heating installation which includes the present circuit arrangement.
An embodiment of the present invention will now be described by way of example only with reference to the accompanying diagrammatic drawing. In the drawing a heater boiler 1 has associated with it an oil or gas burner 2. A temperature controller for the boiler 1 comprises two stages: a first stage 3 and a second stage 4.
A four-way mixer 5 having a motor actuator is located in the delivery conduit 14 which leads from the boiler 1.
A central control unit 6 incorporating a time switch is included in the circuit. The outside temperature is measured by a sensor or pickup 7 whereas the temperature of water delivered into the system is monitored by a pickup 8. A delivery thermostat 9 is sensitive to the water temperature in a delivery conduit 14 which leads to the heat consumer (which is not shown in the drawing). Associated with this delivery conduit is a motor-driven circulation pump 10 having a pump switch 11.
The broken lines represent electrical connections, the solid biock dots at points where these electrical connections cross indicating electrically conductive junctions. The electrical circuit includes electrical fuses 12 and 13.
The reference numerals 14 and 1 5 indicate the delivery and return conduits respectively of the heating system.
The method of operation will now be described. During daytime operation from e.g.
06.00 to 22.00 hours the control unit 6 controls the heating installation according to the outside air temperature, measured by the outside temperature pickup 7, and the delivery temperature measured by the delivery temperature pickup 8. The boiler water temperature is held by the first stage 3 of the controller to 500 to 600C. If the delivery temperature of the heating installation exceeds a specific value preset at the delivery thermostat 9, the latter closes and bypasses the first controller stage 3 of the boiler. The boiler water temperature is then monitored by the controller 4 and kept to about 800 to 900C. The temperature of the boiler water is thus only put on to the higher level when the need arises.
If the delivery temperature at the delivery thermostat 9 falls below the preset value, the bypassing effect is discontinued, and the first controller stage 3 resumes the monitoring role at the boiler 1 to supervise the boiler water temperature.
During night time operation, from e.g. 22.00 to 06.00 hours the installation operates as described hereinbefore. If a night time lowering arrangement is used then for by far the greater part of the heating period the first controller stage 3 will monitor the boiler water temperature, since the heating installation is usually run at a low delivery temperature during the duration of the lowered operating state.
For a boiler having a domestic water heater its operation is as already described. The priority circuit of the domestic water heater (not shown) however must be so connected that the controller 3 of the boiler 1 is electrically bypassed and the boiler 1 is operated by the second controller stage 4 at a boiler water temperature of 800 to 900C during dispensing from and charging to the domestic water.
Claims (8)
1. Circuit arrangement for a water heating installation having a heating boiler with a delivery conduit leading therefrom and a multi-way mixer included in the delivery conduit, the circuit arrangement including:
(i) a control unit adapted to control the delivery temperature of the water in dependence on the ambient air temperature;
(ii) one or more thermostats each of which is sensitive to the temperature of the water in the delivery conduit and is adjustable to a pre-set temperature, the said preset temperature varying among the thermostats when more than one is present so that the thermostats are activated successively across a temperature range; and
(iii) a temperature controller adapted to regulate the temperat;ure of the boiler, the controller including two or more stages each of which is adapted to regulate the boiler temperature over a predetermined temperature range which varies from one stage to another, the arrangement being such that when the pre-set temperature at one of the thermostats is exceeded or no longer attained by the temperature of the water in the delivery conduit as controlled by the control unit the stage regulating the temperature of the boiler is switched to one regulating the boiler at a higher or lower temperature range respectively.
2. Circuit arrangement according to claim 1 wherein the control unit includes a time switch.
3. Circuit arrangement according to claim 2 wherein the stage of the temperature controller which regulates the boiler temperature at the lower or lowest predetermined temperature range is arranged to regulate the boiler temperature during times of low demand such as at night.
4. Circuit arrangement according to any one of the preceding claims wherein the stage of the temperature controller which regulates the boiler temperature at thee higher or highest predetermined temperature range is arranged to regulate the boiler temperature whilst water is dispensed from or charged to the boiler.
5. Circuit arrangement substantially as herein described with reference to the accompanying drawing.
6. Water heating installation having a circuit arrangement according to any one of the preceding claims and a heating boiler with a delivery conduit leading therefrom and a multiway mixer included in the delivery conduit.
7. Water heating installation according to claim 6 wherein the multi-way mixer has a motor actuator and is located in the delivery conduit intermediate the boiler and the said one or more thermostats.
8. Water heating installation substantially as herein described with reference to the accompanying drawing.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19782851212 DE2851212A1 (en) | 1978-11-27 | 1978-11-27 | CIRCUIT FOR A HOT WATER HEATING SYSTEM |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2042709A true GB2042709A (en) | 1980-09-24 |
| GB2042709B GB2042709B (en) | 1983-03-23 |
Family
ID=6055636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7938935A Expired GB2042709B (en) | 1978-11-27 | 1979-11-09 | Water heating installation and circuit arrangement therefor |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE2851212A1 (en) |
| FR (1) | FR2442410A1 (en) |
| GB (1) | GB2042709B (en) |
| IT (1) | IT1125872B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2340965A (en) * | 1998-08-22 | 2000-03-01 | John Montgomery | Controlling a central heating boiler |
| GB2363189A (en) * | 2000-06-08 | 2001-12-12 | Gasforce Ltd | Controller for water-heating system |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2656668B1 (en) * | 1989-12-28 | 1992-04-17 | Losego Martine | AUTOMATIC THERMOSTATIC MIXER WITH INCORPORATED REDUCER. |
| AT412120B (en) * | 1999-07-07 | 2004-09-27 | Vaillant Gmbh | WATER HEATING SYSTEM |
| AT410134B (en) * | 1999-07-07 | 2003-02-25 | Vaillant Gmbh | WATER HEATING SYSTEM |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1991147U (en) * | 1968-08-08 | Hermann Koch, Kontroll- und Fernmessgeräte, 7000 Stuttgart | Controllers for heating systems | |
| DE1977545U (en) * | 1965-10-20 | 1968-01-25 | Loell K G Elektrotechnik Masch | CONTROL UNIT FOR HOT WATER HEATING SYSTEM. |
| DE2021579A1 (en) * | 1970-05-02 | 1971-11-25 | Heinrich Brockerhoff | Oil- or gas-fired central heating system with additional electric heater |
| DE2524302C2 (en) * | 1975-06-02 | 1986-01-02 | CENTRA-BÜRKLE GmbH, 7036 Schönaich | Method and system for controlling or regulating a heating system |
-
1978
- 1978-11-27 DE DE19782851212 patent/DE2851212A1/en not_active Ceased
-
1979
- 1979-11-09 GB GB7938935A patent/GB2042709B/en not_active Expired
- 1979-11-26 IT IT27558/79A patent/IT1125872B/en active
- 1979-11-27 FR FR7929162A patent/FR2442410A1/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2340965A (en) * | 1998-08-22 | 2000-03-01 | John Montgomery | Controlling a central heating boiler |
| GB2363189A (en) * | 2000-06-08 | 2001-12-12 | Gasforce Ltd | Controller for water-heating system |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2851212A1 (en) | 1980-06-12 |
| GB2042709B (en) | 1983-03-23 |
| FR2442410B3 (en) | 1981-08-14 |
| IT1125872B (en) | 1986-05-14 |
| IT7927558A0 (en) | 1979-11-26 |
| FR2442410A1 (en) | 1980-06-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 732 | Registration of transactions, instruments or events in the register (sect. 32/1977) |