GB2375592A - Electric shower with power consumption limit - Google Patents
Electric shower with power consumption limit Download PDFInfo
- Publication number
- GB2375592A GB2375592A GB0211305A GB0211305A GB2375592A GB 2375592 A GB2375592 A GB 2375592A GB 0211305 A GB0211305 A GB 0211305A GB 0211305 A GB0211305 A GB 0211305A GB 2375592 A GB2375592 A GB 2375592A
- Authority
- GB
- United Kingdom
- Prior art keywords
- power consumption
- elements
- shower
- heater
- maximum
- 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.)
- Withdrawn
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 74
- 238000010438 heat treatment Methods 0.000 claims abstract description 26
- 230000000670 limiting effect Effects 0.000 claims abstract description 14
- 230000004913 activation Effects 0.000 claims abstract description 7
- 239000008236 heating water Substances 0.000 claims abstract description 3
- 230000003213 activating effect Effects 0.000 claims description 9
- 238000009434 installation Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000002829 reductive effect Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
- 238000012937 correction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000002453 shampoo Substances 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
Classifications
-
- 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
- F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
- F24H9/2028—Continuous-flow heaters
-
- 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
- F24H15/10—Control of fluid heaters characterised by the purpose of the control
- F24H15/156—Reducing the quantity of energy consumed; Increasing efficiency
-
- 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
- F24H15/215—Temperature of the water before 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
- F24H15/20—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
- F24H15/20—Control of fluid heaters characterised by control inputs
- F24H15/238—Flow rate
-
- 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
- F24H15/281—Input from user
-
- 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
- F24H15/355—Control of heat-generating means in heaters
- F24H15/37—Control of heat-generating means in heaters of electric heaters
-
- 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
-
- 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
- G05D23/1927—Control of temperature characterised by the use of electric means using a plurality of sensors
- G05D23/193—Control of temperature characterised by the use of electric means using a plurality of sensors sensing the temperaure in different places in thermal relationship with one or more spaces
- G05D23/1931—Control of temperature characterised by the use of electric means using a plurality of sensors sensing the temperaure in different places in thermal relationship with one or more spaces to control the temperature of one space
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- Computer Hardware Design (AREA)
- Fluid Mechanics (AREA)
- Remote Sensing (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
Abstract
An electric shower has a water heater 10 with a plurality of electrical heating elements 24, 26, 28, 30 for heating water passing through the heater. A control means 36 activates any one or more of the elements in various combinations to provide a desired output water temperature. The shower also has a maximum power consumption limiting means 52 - 64 to selectively inhibit activation of combinations of elements having a combined power rating above a pre-determined value which is less than the total combined power rating of all the heating elements in the heater. The maximum power consumption limiting means comprises a jumper link 52 which can be positioned between any one of a number of pairs of terminals 54-64 to selectively limit the maximum power consumption of the shower to one of a number of pre-determined values suitable for use with a corresponding range of pre-existing wiring installations.
Description
Electric Shower The present invention relates to an electric shower and in
particular to an electric shower having a water heater with a plurality of heating elements.
Electric showers are known which have a water heater with an electric heating element. To 5 heat the water, an electric current is passed through the heating element and the heat thus generated is transferred to the water as it passes through the water heater. It is also known to provide an electric shower having water heater with two or more heating elements. In one common arrangement, the shower has a manual control which allows a user selectively activate any one or more of the elements to provide a desired water temperature. Typically 10 two elements are provided, each having a different power rating and the user is able to activate either of the elements on their own or both elements together to provide a low, medium or a high power setting. In an alternative lcnown arrangement, the water heater has number of heating elements and a control system which automatically switches the elements on and off in various combinations to maintain a desired output water temperature. The 15 maximum power consumption of water heaters having multiple heating elements is determined by the combined power rating of all the elements.
To meet ever increasing demands for performance, the maximum power rating of electric showers has steadily increased over recent years. Currently, modern electric showers are being manufactured in which the elements have a maximum combined power rating of 20 approximately 0. SkW. This figure being chosen because it utilizes the maximum capability of currently available terminal blocks which is 45A at 240V. However, there is often a requirement to fit an electric shower as a replacement for a previously fitted shower which had a lower maximum power rating than that which is currently available. In such circumstances, the existing cabling may not have sufficient capacityto safely handle the load 25 of the latest, most highly rated showers. To meet this demand, shower manufactures have had to produce a range of showers having different maximum power ratings to suit various existing wiring installations. The need to produce a range of showers having different maximum power ratings significantly adds to the cost of manufacturing and marketing when
introducing a new shower design.
The object of the present invention is to provide an improved electric shower which overcomes or at least mitigates the problems of the known electric showers.
In accordance with the invention, there is provided an electric shower comprising a water heater having a plurality of electrical heating elements for heating water passing through the heater and control means for selectively activating any one or more of the elements, in which the shower further comprises means for selectively limiting the maximum power consumption 10 of the heater, the maximum power consumption limiting means operating in use to inhibit the activation of elements in combinations having a combined power consumption above a pre-
determined value, which pre-determined value is less than the total combined power consumption of all the heating elements in the heater.
An electric shower in accordance with the invention can be produced having heating elements 15 with a maximum total combined power rating which is as high as current wiring installations can safely handle. However, when the shower is to be fitted to a pre-existing wiring installation with a lower load handling capacity, the maximum power consumption of the shower can be limited to a value which can be safely handed by the pre-existing wiring installation. As a result, a shower manufacture need only produce one electric shower in which 20 the maximum power consumption of the heater can be simply adjusted, on fitting, to suit a range of pre-existing wiring installations.
Preferably, the control means comprises means for automatically activating one or more ofthe heater elements in different combinations to maintain a desired water output temperature.
Alternatively, the control means can comprise a manually operable means by which a user can 25 selectively activate one or more of the elements.
In a first preferred embodiment, the maximum power consumption limiting means comprises a link which can be selectively positioned between one of a number of pairs of connections,
each pair of connections corresponding to a different pre-determined value for the maximum permitted power consumption.
In a second preferred embodiment, the maximum power consumption limiting means comprises a multi-position switch, each position of the switch corresponding to a different 5 pre-determined value for the maximum permitted power consumption.
Alternatively, where the control means comprises means for automatically activating any one or more of the heater elements in different combinations to maintain a desired water output temperature, the control means may be programmable to inhibit it from activating combinations of elements having a combined power consumption above the pre-determine l O value.
Preferably, the maximum power consumption limiting means is adapted to inhibit the activation of combinations of elements having a combined power rating above 6.9kW or 7.71kW or 8.49kW or 9.25kW or l O.8kW.
Advantageously, the maximum power consumption limiting means can be set to inhibit 15 activation of any of the heating elements.
An embodiment of the invention will now be described, by way of example only, with reference to the accompanying drawings in which: Figure 1 is a schematic drawing showing the water heater of an electric shower in accordance with the invention; and 20 Figure 2 is a perspective view of part of the control means of the water heater of Figure 1.
A water heater 10 for an electric shower comprises a heater tube 12 having an inlet 14 and an outlet 16. The tube 12 has an inner tube member 18 and an outer tube member 20. When in use, the tube 12 is arranged so as to be aligned substantially vertically.
$ Cold water from a suitable water supply (not shown) enters the heater tube 12 through the inlet 14 from where it flows, via a solenoid controlled valve 22, down through the inner tube member 18. When the water reaches the bottom of the inner tube member, it flows back upwards between the inner tube member and the outer tube member 20 towards the outlet 16.
5 From the outlet, the water is delivered to a shower head (not shown) by means of suitable pipe work (also not shown).
Four electrical heating elements 24, 26, 28, 30 are affixed to the external surface ofthe outer tube member 20. Each heating element is selectively and independently connectable to an electrical power supply 32 by means of a respective relay 34.
10 Each element when connected to the power supply generates heat which is transferred across the outer tube member 20 to the water as is flows up the tube 12 between the inner tube member 18 and the outer tube member 20.
Each of the elements has a different power rating and so generates a different amount of heat when connected to the power supply. In the present embodiment, a first of the elements 24 has 1 5 a power rating of 1 542W, a second element 26 has a power rating of 2313 W. a third element a power rating of 3084W, whilst a fourth element has a power rating of 3855W. This arrangement gives a minimum power rating of 1 542W if only the first element 24 is activated and a maximum combined power rating for all elements of approximately 10.8kW.
It will be noted that the power ratings ofthe elements are based on a step value of 771 W. Thus 20 the first element 24 has a power rating of 2 x 771 W. the second element 26 has a power rating of 3 x 771W, the third element 28 has a power rating of 4 x 771W end the fourth element30 has a power rating of 5 x 771 W. As indicated above, each of the elements can be activated independently of the others by closing its respective relay 34 to connect the element to the power supply. By activating the 25 elements either singly or together in various combinations, 12 different power ratings are possible as shown in the table below.
Elements activated | Power rating l First 1542W Second 2313W Third 3084W 5 Fourth 3855W First & Third 4626W First & Fourth or Second & Third 5397W Second & Fourth 6168W Third & Fourth or First & Second & Third 6939W 10 First & Second & Fourth 7710W First & Third & Fourth 8481 W Second, Third & Fourth 9255W First & Second & Third & Fourth 10794W For the avoidance of doubt, it should be noted that throughout this specification, including the
15 claims, references to combinations of elements or to elements being activated in combinations or the line are to be understood as including a single heating element.
The water heater also comprises a control means, indicated generally at 36, which is operative to control the output water temperature of the shower and the rate of flow of water through the shower. The conko1 means comprises a Central Processing Unit (CPU) 38 which has 20 microprocessor circuitry including a memory and is operatively connected to relay drivers 40 for selectively opening and closing the relays 34 connecting the heating elements to the power supply. The CPU is also operatively connected at 35 to the solenoid valve 22 to control the flow of water through the heater tube 12.
Input data for the control means is provided by art inlet water temperature sensor 42 for 25 sensing the temperature of the water entering the heater, otherwise known as the inlet water temperature; an outlet water temperature sensor 44 for sensing the temperature of the water leaving the heater, otherwise known as the outlet water temperature, and a flow meter 46 for measuring the flow rate of the water. The temperature sensors 42, 44 and the flow meter 46 are all connected to the CPU by suitable cables 43, 45, 47 and the CPU may also have the 30 necessary signal processing circuitry to convert the signals from the sensors into a suitable form for the microprocessor. Such signal processing circuitry may include an analog to digital converter for example.
A user interface 48 is also provided. The user interface 48 has various displays for the user and input devises, such as push buttons, through which the user can select a desired mode of operation for the shower. In particular, the interface provides an input device through which the user can select a desired output water temperature for the shower. The user interface is 5 connected to the CPU as indicated at 50.
Operation of the shower will now be described.
On first use of the shower, the control means checks the systems ability to supply water by opening the solenoid valve 22 and monitoring the flow rate of the water as sensed by the flow meter 46. The maximum flow rate, or flow capacity, of the system is retained in the memory O of the control recleans and will be updated each time the shower is operated. This ensures that any changes in flow capacity, due for instance to a build up of deposits in the pipe work supplying the shower, can be taken into account by the control means where selecting the required flow rate and element combination to provide the desired output water temperature.
Typically, but not exclusively, an electric shower in accordance with the invention is designed 15 to operate with a flow rate of up to approximately 10 L/m. If the flow capacity of the system exceeds this value, the solenoid valve 22 is operated to restrict the maximum flow rate through the shower accordingly.
Subsequently, when a user wishes to take a shower, the user operates the appropriate controls on the user interface. This may include activating a switch to turn the shower on and selecting 20 a desired output water temperature.
Once to shower has been turned on, the control means checks the input water temperature as sensed by the input water temperature sensor 42 and calculates the optimum combination of water flow rate (up to the maximum flow rate for the shower), and heater element power to achieve the desired water temperature. The required combination of elements is then 25 activated by closing the appropriate relay or relays 34 and the flow rate of the water is controlled by means of the solenoid valve 22.
During the shower, the control means will continue to monitor the input water temperature and the flow rate of the water. If there are any changes, such as for example a drop in the temperature of the water entering the shower, then the optimum flow rate and element
combination is automatically re-calculated and adjusted to maintain the desired output water temperature. The control means will also monitor the actual output water temperature as sensed by the output water sensor 44 to ensure that the desired output water temperature has been achieved.
5 If the actual water temperature is different from the desired temperature, then the control means will vary the flow rate and/or the element combination until the actual output water temperature matches the desired output water temperature as selected by the user.
In calculating the optimum combination of flow rate and heater element power, the control means is programmed to maximise the flow rate of water through the shower for the selected lO temperature, up to the maximum flow rate of the heater. The control means will thus determine whether a desired outlet water temperature can be achieved at the maximum flow rate by selecting a particular combination of heating elements. If not, the control means determines the combination of heater elements which it predicts will achieve an outlet water temperature that is closest to, but less than, the desired temperature and will then calculate the 15 amount by which the flow rate needs to be reduced in order to achieve the desired outlet temperature with that combination of elements. The control means then activates the selected combination of elements and adjusts the flow rate accordingly. In effect, the control means uses the selection of heater element combinations as a course temperature control with adjustment of the flow rate being used to fme tune the outlet water temperature.
20 At all times the control means will seek to provide the predetermined outlet water temperature at the highest possible flow rate up to the maximum flow rate of the shower. As indicated above, the control means monitors the flow capacity of the shower during use. In the event that the maximum possible flow rate drops, for example due to a build up of deposits in the supply pipe work, the control means uses the new lower maximum flow rate when calculating 25 the optimum combination of flow rate and heater element power.
Where a change in the inlet water temperature is detected during use ofthe shower, the control means will assess whether the change needs to be compensated for by changing the combination of heater elements which are activated, the flow rate of the water through the heater, or a combination of both. If the change in inlet water temperature is small and a change 3 0 in the heater element combination would over compensate, the control means may vary the flow rate only. However, the control means will change both the element combination and the
flow rate if this enables the desired outlet water temperature to be delivered at a higher flow rate. Changes in the flow rate of the water through the heater, due for example to a sudden drop in the pressure of the water supply, will be compensated for by adjusting the solenoid valve 22 5 alone whenever possible. Where the flow rate of the water entering the heater drops, the solenoid valve 22 will be opened to compensate. If, however, the solenoid valve is already fully open or if opening the valve is not sufficient to fully compensate for the drop in flow rate, the control means will recalculate the required combination of heater elements and flow rate to produce the desired outlet water temperature at the highest possible flow rate. If the 10 flow rate should subsequently increase, the control means will again recalculate the required combination of heater elements and flow rate required to deliver the desired outlet water temperature whilst maximising the flow rate of the water within the limits of the heaters capacity. In certain circumstances, the shower may have an input to allow the user to select a reduced 15 flow rate. For example, the shower may have a low flow rate mode which can be selected by the user when they wish to apply shampoo. Where a user has selected a reduced flow rate mode in this way, the control means will treat the reduced flow rate as if it were the maximum flow rate when controlling the outlet water temperature.
In calculating the optimum combination of heating elements and flow rate to achieve the 20 desired output temperature, the microprocessor will use pre-programmed algorithms which are based on the nominal power ratings of the heating elements 24, 26, 28, 30. However, due to manufacturing tolerances, the actual power rating of the elements in any particular shower may vary from these nominal values. Thus, any particular element may generate more or less heat than the microprocessor expects.
25 In order that the control means can more accurately predict and select the optimum combination of elements and flow rate, the microprocessor has a self-calibration facility.
During use of the shower, ',he microprocessor monitors the actual outlet water temperature achieved for any given combination of activated heating elements, flow rate and inlet water temperature and compares this with an expected outlet temperature for those conditions.
30 Where differences between the values of the actual and expected outlet water temperature is detected, this information is used to generate a correction factor or weighting for each element.
The correction factors are stored to memory for subsequent use by the control means when calculating the required combination of elements and flow rate. This allows for a progressively more accurate predictive setting of the element and flow rate combinations available.
As was discussed earlier, in the embodiment shown, the maximum combined power rating of 5 all the elements is approximately 1 0.8kW. This value has been selected because it utilizes the maximum capability of currently available terminal blocks which is 45A at a voltage of 240V.
However, there may be occasions when it is desired to fit the shower as a replacement for a previously fitted shower which had a lower power rating and where the existing cabling cannot be used safely with this load. In order that the shower can be used safely in these 10 circumstances, the shower 10 is provided with a jumper link 52 which can be positioned between any one of a number of pairs of terminals 54, 56, 58, 60, 62, 64 to selectively limit the maximum permitted power consumption of the shower. Positioning the jumper link on a particular pair of links will cause the control means to disallow any combination of elements which have a power rating above the maximum power consumption selected.
15 In the present embodiment there are six pairs of the links, the first pair 54 is provided as a shipping position and with the link connected across this pair no heating elements can be activated. The remaining five pairs of links allow for maximum power settings of 6.94kW, 7.7 lkW, 8. 48kW, 9.25kW, and 1 0.8kW respectively. These values allowing for replacement of existing showers with wiring from 4mrn2 to 1 Omm2.
20 It will be understood that other methods could be adopted for selecting the maximum permitted power consumption for the shower. For example a multi-position switch could be used rather than the link arrangement. Alternatively, the maximum power consumption can be selected by programming the microprocessor to disallow any combinations of elements having a power consumption above the desired value.
25 The ability to limit the maximum power consumption ofthe heater means that a manufacturer need supply only one shower to meet all the normal power ratings currently in use, rather than having to supply a range of showers each having a different maximum power rating or consumption. This considerably reduces manufacturing and marketing costs.
It should be noted in this regard, that the concept of using means for inhibiting combinations 30 of activated elements which have a combined power rating above a pre-determined value is
not limited to use in showers having automatic control means. Indeed, this concept can be used in any electric shower having two or more heating elements to provide a shower which can be used safely with power supplies having differing power ratings.
Although the present embodiment has been described as having four heating elements, it 5 should be understood that the invention encompasses a shower having a heater with any number of heating elements from two upwards. Furthermore, the actual power ratings of the elements can be varied as appropriate to the application.
Claims (9)
1. An electric shower comprising a water heater having a plurality of electrical heating elements for heating water passing through the heater and control means for selectively activating any one or more of the elements, in which the shower further 5 comprises means for selectively limiting the maximum power consumption of the heater, the maximum power consumption limiting means operating in use to inhibit the activation of elements in combinations having a combined power consumption above a predetermined value, which pre-determined value is less than the total combined power consumption of all the heating elements in the heater.
10
2. An electric shower in accordance with claim 1, in which the control means comprises means for automatically activating one or more of the heater elements in different combinations to maintain a desired water output temperature.
3. An electric shower in accordance with claim 1, in which the control means comprises manually operable means by which a user can selectively activate one or more of the 1 S elements.
4. An electric shower in accordance with any one of claims 1 to 3, in which the maximum power consumption limiting means comprises a link which can be selectively positioned between one of a number of pairs of connections, each pair of connections corresponding to a different predetermined value for the maximum 20 permitted power consumption.
S. An electric shower in accordance with claim any one of claims 1 to 3, in which the power limiting means comprises a multi position switch, each position of the switch corresponding to a different pre-determined value for the maximum permitted power consumption. 25
6. An electric shower in accordance with claim 2, in which the control means is programmable to inhibit it from activating elements in combinations having a combined power consumption above the pre-determined value.
7. An electric shower in accordance with any previous claim, in which the maximum
power consumption limiting means is adapted to inhibit activation of elements in combinations having a combined power rating above 6.9kW or 7. 71 kW or 8.49kW or 9.25kW or 10.8K.
8. An electric shower in accordance with any previous claim, in which the maximum 5 power consumption limiting means can be set to inhibit activation of any of the heating elements.
9. An electric shower substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GBGB0112097.1A GB0112097D0 (en) | 2001-05-18 | 2001-05-18 | Electric shower |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB0211305D0 GB0211305D0 (en) | 2002-06-26 |
| GB2375592A true GB2375592A (en) | 2002-11-20 |
Family
ID=9914831
Family Applications (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GBGB0112097.1A Ceased GB0112097D0 (en) | 2001-05-18 | 2001-05-18 | Electric shower |
| GB0211306A Withdrawn GB2375593A (en) | 2001-05-18 | 2002-05-17 | Electric shower correction control |
| GB0211305A Withdrawn GB2375592A (en) | 2001-05-18 | 2002-05-17 | Electric shower with power consumption limit |
| GB0211303A Withdrawn GB2375591A (en) | 2001-05-18 | 2002-05-17 | Electric shower with automatic control |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GBGB0112097.1A Ceased GB0112097D0 (en) | 2001-05-18 | 2001-05-18 | Electric shower |
| GB0211306A Withdrawn GB2375593A (en) | 2001-05-18 | 2002-05-17 | Electric shower correction control |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0211303A Withdrawn GB2375591A (en) | 2001-05-18 | 2002-05-17 | Electric shower with automatic control |
Country Status (1)
| Country | Link |
|---|---|
| GB (4) | GB0112097D0 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2389890A (en) * | 2002-04-30 | 2003-12-24 | Electroheat Plc | Flow boiler control system |
| CN105276824A (en) * | 2015-11-24 | 2016-01-27 | 阿里斯顿热能产品(中国)有限公司 | Heating control method for rapid electric water heater compatible with EMC |
| US11515078B2 (en) | 2016-12-21 | 2022-11-29 | Joaquín Enríque NEGRETE HERNANDEZ | Harmonics filters using semi non-magnetic bobbins |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0325399D0 (en) * | 2003-10-31 | 2003-12-03 | Heatrae Sadia Heating Ltd | An improved electric boiler |
| GB2446602A (en) * | 2007-02-13 | 2008-08-20 | Menachem Porat | Thermal regulation of water |
| DE102011016198A1 (en) * | 2010-12-27 | 2012-06-28 | Robert Bosch Gmbh | Water-heater |
| KR20120111906A (en) | 2011-04-01 | 2012-10-11 | 웅진코웨이주식회사 | Apparatus for supplying warm water and method for supplying warm water |
| GB2496636B (en) * | 2011-11-17 | 2016-08-31 | Applied Energy Products Ltd | Shower Control |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2102164A (en) * | 1981-06-25 | 1983-01-26 | Woolhouse Limited Norman | Temperature sensing means |
| GB2148467A (en) * | 1983-10-18 | 1985-05-30 | Gainsborough Electrical | Water heaters |
| GB2184526A (en) * | 1983-10-18 | 1987-06-24 | Gainsborough Electrical | Water heaters |
| US4713525A (en) * | 1986-07-23 | 1987-12-15 | Kowah, Inc. | Microcomputer controlled instant electric water heating and delivery system |
| GB2254678A (en) * | 1991-04-10 | 1992-10-14 | Triton Plc | Instantaneous electric water heater |
| GB2317944A (en) * | 1996-10-04 | 1998-04-08 | Andrew Boulton Renfrew | Electrical water heating appliance |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8329917D0 (en) * | 1983-11-09 | 1983-12-14 | R L & D Ltd | Heating water |
| GB2204966A (en) * | 1987-05-22 | 1988-11-23 | Heatrae Sadia Heating Ltd | Instantaneous water heater with presets |
| GB2269466B (en) * | 1992-08-08 | 1996-01-24 | Caradon Mira Ltd | Improvements in or relating to instantaneous water heaters |
-
2001
- 2001-05-18 GB GBGB0112097.1A patent/GB0112097D0/en not_active Ceased
-
2002
- 2002-05-17 GB GB0211306A patent/GB2375593A/en not_active Withdrawn
- 2002-05-17 GB GB0211305A patent/GB2375592A/en not_active Withdrawn
- 2002-05-17 GB GB0211303A patent/GB2375591A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2102164A (en) * | 1981-06-25 | 1983-01-26 | Woolhouse Limited Norman | Temperature sensing means |
| GB2148467A (en) * | 1983-10-18 | 1985-05-30 | Gainsborough Electrical | Water heaters |
| GB2184526A (en) * | 1983-10-18 | 1987-06-24 | Gainsborough Electrical | Water heaters |
| US4713525A (en) * | 1986-07-23 | 1987-12-15 | Kowah, Inc. | Microcomputer controlled instant electric water heating and delivery system |
| GB2254678A (en) * | 1991-04-10 | 1992-10-14 | Triton Plc | Instantaneous electric water heater |
| GB2317944A (en) * | 1996-10-04 | 1998-04-08 | Andrew Boulton Renfrew | Electrical water heating appliance |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2389890A (en) * | 2002-04-30 | 2003-12-24 | Electroheat Plc | Flow boiler control system |
| GB2389890B (en) * | 2002-04-30 | 2005-08-31 | Electroheat Plc | Flow boiler control system |
| CN105276824A (en) * | 2015-11-24 | 2016-01-27 | 阿里斯顿热能产品(中国)有限公司 | Heating control method for rapid electric water heater compatible with EMC |
| CN105276824B (en) * | 2015-11-24 | 2017-12-12 | 阿里斯顿热能产品(中国)有限公司 | Compatible EMC Rapid electric water heater method for heating and controlling |
| US11515078B2 (en) | 2016-12-21 | 2022-11-29 | Joaquín Enríque NEGRETE HERNANDEZ | Harmonics filters using semi non-magnetic bobbins |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2375591A (en) | 2002-11-20 |
| GB0211303D0 (en) | 2002-06-26 |
| GB0211305D0 (en) | 2002-06-26 |
| GB0112097D0 (en) | 2001-07-11 |
| GB0211306D0 (en) | 2002-06-26 |
| GB2375593A (en) | 2002-11-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |