GB2511368A - Instant electric water heater - Google Patents
Instant electric water heater Download PDFInfo
- Publication number
- GB2511368A GB2511368A GB1309281.2A GB201309281A GB2511368A GB 2511368 A GB2511368 A GB 2511368A GB 201309281 A GB201309281 A GB 201309281A GB 2511368 A GB2511368 A GB 2511368A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 157
- 238000010438 heat treatment Methods 0.000 claims abstract description 97
- 238000005485 electric heating Methods 0.000 claims description 16
- 230000005611 electricity Effects 0.000 claims description 3
- 230000035876 healing Effects 0.000 claims 1
- 238000000034 method Methods 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002453 shampoo Substances 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- 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
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- 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
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
- F24H1/101—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium using electric energy supply
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- 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)
- Control Of Resistance Heating (AREA)
- Multiple-Way Valves (AREA)
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
Abstract
The instantaneous water heater comprises a water flow pipe; a first switch 11; a second switch 12; and a control dial operable to be rotated in order to selectively contact the first and second switches. When the control dial contacts the first switch a flow control valve such as a solenoid valve (2, figure 7) opens to permit passage of water through the water flow pipe. When the control dial contacts the second switch an electrical heating element (31, figure 2) heats water flowing through the water flow pipe. A delay control unit (6,7,7, figures 5-7) is arranged to prevent closure of the flow control valve upon contact between the first switch and the control dial being broken to ensure that residual heat in the heating element is dissipated. Ideally, the instantaneous heater includes a second electrical heating element activated when the control dial contacts a third switch 13. The switches are preferably micro-switches activated by respective first 161, second 162 and third 163 triggers located on a spindle 15 of the control dial. The delay control unit ideally comprises a temperature control switch (6, figure 5) or a time unit (7, figure 6) to control the delay.
Description
Instant electric water heater This invention relates to electric water heater, especially instant electric water heater, also known as instantaneous electric water heater, or instantaneous electric shower.
Instant electric water beater, also known as instantaneous electric water heater, or instantaneous electric shower. Is a different type from storage electric water heater with a water tank.
It uses high-power electric current to help heating pipe or electromagnetic coiled heating elements heats water inside hot water pipe and generates hot water. Therefore compare to traditional storage electric water heater, instant electric water heater has the advantage of saving more time and space.
However, because of this rapid heating characteristics of instant electric water heater, it has one weakness: during shower period, temporarily turn off the hot water due to rub with soap or shampoo, water flow stops inside water pipe, while electric heating element is off power and stop working, however, its residual beat is still high, which will heat water flow inside water pipe to a high temperature, when users turn on hot water again, it is easy to burn user's skin. Furthermore, high residual heat of heating elements will also affect instant electric shower's service life. Therefore to solve the above mentioned problem, when turn off instant electric water heater, it should cut off electric heating elements' electric current first, then turn off water flow inside instant electric water heater's water pipe.
Base on above solution, current instant electric water heater has independent knob controls water flow inside instant electric water heater's water pipe and independent knob controls heating from instant electric shower's electric beating elements, user needs to operate correctly: firstly turn off heating power knob manually, after a certain period, until water output temperature from water pipe back to normal, then turn oft water flow knob manually. This kind of instant electric water heater is difficult to use, cannot meet nowadays people's fast and easy life request.
Therefore an instant electric water heater with intelligent phase shut down water function has been invented, it is mainly controlled by a microcomputer control board, it collects signal from knob's different position and provide to microcomputer chip inside microcomputer control board, microcomputer chip then according to internal program to electronically control different relays, use relay on/off to control connected electric heating elements' heating circuit and water flow loop's on/off inside solenoid valve. This instant electric water heater with intelligent phase shut down water function can meet easy operation request, but its cost is high (need to use many high-current relays), also microcomputer control board can go wrong easily. In addition, there is another instant electric water heater use purely mechanical design method to provide water phase shut down function in instant electric water, but its assembly precision is high, and structure is very complex, cannot be used widely.
Thus, this invention proposes an improved instant electric water heater, use gear knob's mechanical structure and some simple electronic components or circuit board to achieve water phase shut down function, compare to current solutions, its structure is more simple and reliable, also low costs advantage.
This invention use following technical solution to achieve: An instant electric water heater has an external cover, its external cover at least has gear knobs, and its internal structure at least includes water flow pipes, electric heating elements, and flow electronic control valve.Heating power elements use electricity to heat water inside hot water flow pipe, flow electronic control valve controls water stop/start inside water flow pipe, gear knobs at least have 2 mechanical contact switches, rotate them to different position to contact with above mentioned mechanical contact switches and achieve different switch combinations, these mechanical contact switches are series circuited to electric heating elements' circuit and valve electronic control valve's circuit, then achieve on-off control of heating and water flow. Wherein, connect flow electronic control valve's circuit's mechanical contact switch to a delay control unit, to achieve delay shut off of flow electronic control valve's circuit, and achieve flow delay shut down (phase shut down) control of electric water heater.
Wherein, mentioned delay control unit is realize by temperature control delay, details include: firstly parallel one opened temperature control switch and flow electronic control valve's circuit's mechanical contact switch, then series circuit to flow electronic control valve's circuit, this temperature control switch is collecting temperature change and connect or disconnect to one of low electronic control valve's circuit.
Or, described delay control unit is realized by delay timer, details include: series circuit a control board to flow electronic control valve's circuit's mechanical contact switch, then series circuit to flow electronic control valve's circuit, this control board use flow electronic control valve's circuit's mechanical contact switch as trigger signal, use control board to start time control base on this trigger signal, after timing is complete, control board connects or disconnects valve electronic valve's circuit through relay.
Or, described delay control unit is the combination of temperature control and timer, details include: series circuit a control board to flow electronic control valve's circuit's mechanical contact switch, then series circuit to flow electronic control valve's circuit, this control board use flow electronic control valve's circuit's mechanical contact switch as trigger signal, and control board use a temperature detector to collect temperature change information, use control board to start time control base on this trigger signal, control board evaluates synthetically after timing complete and/or collected temperature, then connects or disconnects valve electronic valve's circuit through a relay.
Preferred, described control board and display unit, connect to a display screen, use for display control and information setting.
Preferred, described gear knob at least includes a knob dial base, knob spindle, dial boss, upper microswitch cover, 2pcs or above mechanical contact switches. Knob spindle is fixed to top of dial boss, dial boss's bottom is inserted into knob dial base, then knob spindle can drive dial boss to rotate knob dial base. Upper microswitch cover is fixed on the knob dial base, switch cover is to fix above mentioned mechanical contact switches, and help dial boss move to the proper setting position, different contact point can touch to the corresponding mechanical contact switches and let it connects.
Preferred, described gear knob has U shape elastic part, this U shape elastic part is fixed on upper switch cover, to clip on knob spindle, to limit its rotation position.
Preferred, described gear knob's base has pressure pop up structure.
Wherein preferred, described gear knob includes 2 heating power setting, 1 turn off setting and 1 cold water setting, as I, II, Cold and Off settings respectively. Inside gear knob, there are 3 mechanical contact switches, one is used to control flow electronic valve's circuit, the other two are used to control 2 heating functions' electric elements' circuit, turn on/off status' control is: * When gear knob is rotated to Off position, control and connect flow electronic valve's circuit's first mechanical contact switch, control and connect first heating element's circuit's second mechanical contact switch, control and connect second heating element's circuit's third mechanical contact switch, all of three are disconnected.
* When gear knob is rotated to Cold position, control and connect flow electronic valve's circuit's first mechanical contact switch is connected, control and connect first heating element's circuit's second mechanical contact switch, control and connect second heating element's circuit's third mechanical contact switch, all of two are disconnected.
* When gear knob is rotated to I position, control and connect flow electronic valve's circuit's first mechanical contact switch, control and connect first heating element's circuit's second mechanical contact switch are connected, control and connect second heating element's circuit's third mechanical contact switch is disconnected.
* When gear knob is rotated to II position, control and connect flow electronic valve's circuit's first mechanical contact switch, control and connect first heating element's circuit's second mechanical contact switch, control and connect second heating element's circuit's third mechanical contact switch, all of three are connected.
Wherein preferred, described mechanical contact switch is microswitch.
Wherein preferred, described flow electronic control valve is solenoid valve.
Wherein preferred, described heating element is heating pipe.
Instant electric water heater in this invention, use gear knob to select hot water level also to achieve water phase shut down function, compare to current solutions, its structure is more simple and reliable, also low costs advantage.
Figure 1: An example ol gear knob schematic diagram.
Figure 2: Example l's water phase shut down control system connection.
Figure 3: Example 2's water phase shut down control system connection.
Figure 4: Example 3's water phase shut down control system connection.
Figure 5: Temperature control phase shut down control proposal.
Figure 6: Timing control phase shut down control proposal.
Figure 7: Combination of temperature control and timing control phase shut down control proposal.
Figure 8: An example of gear knob structure's three dimensional drawing ( angle 1).
Figure 9: An example of gear knob structure's three dimensional drawing ( angle 2).
Figure 10: An example of gear knob structure's three dimensional drawing removing U shape elastic part 17, upper switch cover 18, 2 and 3rd microswitches 12, 13 (angle 1).
Figure 11: An example of gear knob structure's three dimensional drawing removing U shape elastic part 17, upper switch cover 18, 2 and 3rd microswitches 12, 13 (angle 2).
Figure 12: An example of gear knob at Off position, position relation drawing between dial boss 16 and 3 microswitches 11, 12 and 13.
Figure 13: An example of gear knob at Cold position, position relation drawing between dial boss 16 and 3 microswitches 11, 12 and 13.
Figure 14: An example of gear knob at I position, position relation drawing between dial boss 16 and 3 microswitches 11, 12 and 13.
Figure 15: An example of gear knob at II position, position relation drawing between dial boss 16 and 3 microswitches 11, 12 and 13.
Firstly instant electric water heater's general structure description. Instant electric water heater has an external cover, the cover has gear knobs to control different positions and functions, cable box connected with AC mains, connection to inlet pipe and shower outlet pipe. Inside external cover, there are water flow pipes, electric heating elements, and flow electronic control valve.Heating power elements use electricity to heat water inside hot water flow pipe, flow electronic control valve controls water stop/start inside water flow pipe, wherein, electric heating elements can be high-power electric tube (ceramic heating tube), or electromagnetic heating coil, etc.Flow electronic control valve can use normal solenoid valve. The detailed structure of instant electric water heater can be revealed in existing product design and related literature, no longer described in details in this document. Furthermore, in additional to above mentioned basic structure, instant electric water heater can be designed according to different functions or needs, and maybe additional functional modules are included.
Now to further explain this invention with attached drawings and implementation design. For the convenience of description, in following examples, the electric heating elements is using high-power electric heating tube, flow electronic control valve is using normal solenoid valve, but these do not limit the invention's other similar or alternative implementation designs.
Firstly, example in this invention has improved gear knobs, there are at least 2 mechanical contact switches fitted into gear knob. Mechanical contact switches is using press and change on/off contact's travel distance to turn on/off mechanical switches, such as microswitches, push button switches, metal dome membrane switches. The following various examples for the drawing and convenient explanation, all use microswitches. This gear knob use knob rotation to different position, mechanically contact with above mentioned 1 or 2 or more mechanical contact switch combinations to output several groups of on/off status. These mechanical contact switches are series circuit to electric heating elements' circuit and solenoid valve's circuit, to control on/off of heating and water flow. Wherein, solenoid valve's circuit is connecting this mechanical contact switch in this circuit (series circuit or parallel connection) to a delay control unit, to phase shut down solenoid valve's circuit, and finally achieve flow delay turn off control function of instant electric shower.
It should be noted that, for the drawing and convenience of description purpose, the various examples use 4 gears gear knob, refer to figure 1 and additional figure 2 to figure 4, gear knob includes 2 heating gears, 1 off gear and 1 cold water gear, i.e. 3 mechanical contact switches are fitted inside, one is used to control flow solenoid valve's circuit, the other two are used to control 2 heating powers' heating elements circuit. If only use 1 heating gear, then remove 1 gear and 1 mechanical contact switch base on various samples, if use 3 heating gears, then add a gear and 1 mechanical contact switch base on various samples, and so on.
Refer to figure 8 to figure 15 and additional figure 1, gear knob in the example is with following functions: * When gear knob is rotated to Off position, control and connect solenoid valve 2's circuit's first microswitch 11, control and connect first heating element 31's circuit's second microswitcb 12, control and connect second heating element 32's circuit's third microswitch 13, all of three are disconnected.
* When gear knob is rotated to Cold position, control and connect solenoid valve 2's circuit's first microswitch 11 is connected, control and connect first heating element 31's circuit's second microswitch 12,control and connect second heating element 32's circuit's third microswitcb 13, all of two are disconnected.
* When gear knob is rotated to I position, control and connect solenoid valve 2's circuit's first microswitch 11, control and connect first heating element 31's circuit's second microswitcb 12 are connected, control and connect second heating element 32's circuit's third microswitch 13 is disconnected.
* When gear knob is rotated to II position, control and connect solenoid valve 2's circuit's first microswitch 11, control and connect first heating element 31's circuit's second microswitch 12, control and connect second heating element 32's circuit's third microswitch 13, all of three are connected.
Therefore, gear knob in example use following structure design. Refer again to figure 8 to figure 15, this gear knob includes a knob dial base 14, knob spindle 15, dial boss 16, U shape elastic part 1 7,upper microswitch cover 18, and three microswitches switches 11, 12 & 13. Knob spindle 15 is fixed to top of dial boss 16, dial boss 16's bottom is inserted into knob dial base 14, then knob spindle 15 can drive dial boss 16 to rotate knob dial base 14. Upper microswitch cover 18 is fixed on the knob dial base 14 through a clip (or screw), switch cover 18 is to fix above mentioned first, second and third microswitches 11, 12 and 13, and U shape elastic part 1 7.The first microswitch is fixed on an appropriate position of switch cover 18, then when dial boss 16 is rotated to proper position, it can touches its contact and finish conduction.U shape elastic part 17 fixed on switch cover 18 is to clip on knob spindle 15, and limit its rotation position. Gear knobs 1 and 4 in the example, there is square shape part on knob spindle 15 to match with this U shape elastic part 17 to provide 4 position limitations of knob. Where U shape elastic part 17 might be relaced by other position limitation parts for same function, Design here is normal gear knob design, and will not be described in detail.
Also, knob dial base 14 can also be connected with connection pipe 141, for water flow pipe connection purpose. Knob dial base 14 has water pressure pop up structure, only when water pressure exists in knob dial base 14, dial boss 16 fitted in knob dial base 14 can touch three microswitches 11, 12 and 13' contacts at the right position, i.e. Gear knob 1 can perform its control function only if water pressure exists, this water pressure pop up structure design is for safety protection of instant electric water heater during use, some electric water heater's gear knob has same or similar structure design, and will not be described here in detail.
Also, gear knob has an knob handle fixed on knob spindle 15 (not shown in figure), to facilitate easy knob rotation by user, this is normal design, and will not be described here in detail.
Below with reference to the attached figures 12 to 15, and additional figures 8 to 11, to describe in detail about dial boss 16 at 4 different gear positions and the trigger condition of first, second, third microswitches 11, 12, 13. Dial boss 16 is designed with 3 corresponding triggers for above mentioned first, second, third microswitches 11, 12, 13.
They are located at: first trigger 161 is at dial boss 16's spindle center position, second trigger 162 is between dial boss 16's spindle center position and outer ring, and third trigger 163 is at dial boss 16's outer ring.
First trigger 161's external geometry is 1/4 of a full circular missing inwardly to form a irregular circular, the 1/4 missing part is exactly the Off position of gear knob 1, and first microswitch 11 is fixed to a position so that its contacts towards first trigger 161, so when gear knob 1 is at Off position, first trigger 161 will not touch first microswitch 11's contacts, where the other three gear positions touch the contacts of the first microswitch 11. Further, in order to achieve better contact and reliable touch, the first microswitch 11 is lever type microswitch.
Second trigger 162's external geometry is a shape that 1/2 circular ring of a circular boss missing inwardly, the 1/2 missing part is exactly at gear knob l's Off and Cold position, , and second microswitch 12 is fixed to a position downward so that its contacts towards second trigger 162's 1/2 circular ring's missing part, so when gear knob 1 is at Oft and Cold position, second trigger 162 will not touch second microswitch 12's contacts, where the other two gear positions I & II touch the contacts of the second microswitch 12. Further, in order to achieve better contact and reliable touch of second microswitch 12, the transition surface between second trigger 162's 1/2 circular ring's missing part and circular boss is angular surface.
Third trigger 163's external geometry is the convex portion of a 1/4 circular ring (circular ring has certain width, its width is greater than microswitch's contacts), the 1/4 circular ring's convex portion is exactly at gear knob l's II position, , and third microswitch 13 is fixed to a position downward so that its contacts towards third trigger 163's 1/4 circular ring's convex portion, so when gear knob 1 is at II position, third trigger 163 will not touch third microswitch 13's contacts, where the other gear positions Off, Cold and I, third trigger 163 will not touch the contacts of the third microswitch 13.
Further, in order to achieve better contact and reliable touch of third microswitch 13, third trigger 163's 1/4 circular ring's convex portion, its start and end are both angular surface.
Please note, dial boss 16's first, second, third triggers 161, 162, 163 are designed for first, second and third microswitches 11, 12, 13's triggering. Practically, it can be partially set at knob spindle 15, and partially set at dial boss 16, for example, in attached figures 8 to 11, first trigger 161 is set at knob spindle 15, is located at the top of where matches with dial boss 16; or dial boss 16 and knob spindle 15 are an integral structure, which contains first, second, third triggers 161, 162 and 163, but not limited to design in attached figures.
Secondly, refer to figure 5 to 7, in this invention's example, water phase shut down control method can use temperature control delay, timing delay or combination of temperature control and timing delay three ways to achieve.
Example 1:
Refer to figure 5 and additional figure 2, use temperature control delay water shut down control proposal, firstly parallel one opened temperature control switch and flow electronic control valve's circuit's mechanical contact switch, then series circuit to flow electronic control valve's circuit, this temperature control switch is collecting temperature change and connect or disconnect to one of low electronic control valve's circuit. More specifically: solenoid valve 2 which control water flow loop's one end connects to Neutral wire N, the other end has two channels, one is the first rriicroswitch 11 in gear knob 1, the other channel is opened temperature control switch 6. Heating circuit control is series circuit second microswitch 12 to first electric heating pipe 31 to form first heating circuit, and series circuit third microswitch 13 to second electric heating pipe 32 to form second heating circuit, this opened temperature control switch 6 is mounted at the position near the hot water flow pipe, to collect temperature change more accurately and to achieve a switching operation.
From above description about gear knob 1, we know that: * When instant electric water heater is not used, when gear knob 1 is at Off position, microswitcbes 11, 12 and 13 are all disconnected, temperature control control switch 6 is also disconnected, then instant electric water heater's water flow and heating circuits are both disconnected, there is neither water flows nor heating in the instant electric water heater.
* When gear knob 1 is at Cold position, first microswitcb 11 is connected, second and Ihird microswilches 12 and 13 are all disconnected, temperathre control control switch 6 is also disconnected, then instant electric water heater's water flow loop is connected but heating circuit is disconnected, there is water flows out but no heating in the instant electric water heater, i.e. only cold water flows out.
* When gear knob 1 is at I position, first and second microswitches 11, 12 are connected, microswitch 13 is disconnected, then instant electric water heater's water flow loop is connected, and first heating circuit is connected, but second heating circuit is disconnected, there is water flows out at first heating power in the instant electric water heater, i.e. warm water flows out.
* When gear knob 1 is at II position, first, second and third microswitches 11, 12, 13 are all connected, then instant electric water heater's water flow loop is connected, first and second heating circuits are connected, there is water flows out at two heating power in the instant electric water heater, i.e. hotter water flows out.
Refer to figure 1 and figure 8 to 15 again, when gear knob 1 is rotated from hot water position I or II to Off position, first microswitch 11's channel is disconnected, but due to high residual heat of first electric heating pipe 31, or first and second electric heating pipes 31, 32, temperature inside instant electric water heater's water flow pipe is still high, temperature control control switch 6 is connected, and makes its channel is connected, until temperature in the water flow pipe decreases to normal temperature, temperature control control switch 6 get back to disconnected status, and will disconnect solenoid valve 2's power supply channel, cut off water flows inside instant electric water heater's flow pipe, to achieve flow delay shut down protection function.
Further more, this instant electric water heater connects to AC mains through junction box 5, and series circuit to a closed temperature control control switch 4 (Also known as "thermal cut-out", or "TOO" for short) in the overall electrical circuit to provide whole protection, when instant electric water heater's temperature is too high due to abnormal failures, this temperature control control switch 4 cut off main power supply. This temperature control control delay turn off water system's advantage is: intelligently turn off water base on water temperature change.
Example 2:
Refer to figure 6 and additional figure 3, use timing delay water shut down control proposal, firstly series circuit a control board to solenoid valve's circuit's mechanical contact switch, then series circuit to solenoid valve's circuit, this control board use solenoid valve's circuit's mechanical contact switch as trigger signal, use control board to start time control base on this trigger signal, after timing is complete, control board connects or disconnects solenoid valve's circuit through relay.More specifically: this example is substantially the same as in example 1, heating circuit and total circuit protection's structure are the same, main difference is: solenoid valve 2 which controls water flow loop's one end is connected to Neutral wire N, the other end is connected to a control board 7, use relay unit on control board 7 to control connection and disconnection switching. Besides above mentioned relay unit, this control board 7 also has a microprocessor (MCU), timing unit and power supply unit. Power supply unit is connected to the junction box, and convert AC mains into low voltage DC working power. First microswitch 11 is connected to this control board 7, then control board 7's MCU starts timing unit timing base on collected first microswitch's switching signal, after timing is finished, control relay to cut off water flow loop. The microprocessor, timing unit, power supply unit and relay unit in this control board 7 can use simple electric circuit from current available technology, cost is low. This timing delay turn off water system/s advantage is: according to fixed time period to delay water shut down, will not delay water shut down due to delay temperature collection.
Example 3:
Refer to figure 7 and additional figure 3, use combination of temperature control and timer to delay water shut down, firstly series circuit a control board to solenoid valve's circuit's mechanical contact switch, then series circuit to solenoid valve's circuit, this control board use solenoid valve's circuit's mechanical contact switch's switching signal as trigger signal, and control board use a temperature detector to collect temperature change information, use control board to start time control base on this trigger signal, control board evaluates synthetically after timing complete and/or collected temperature, then connects or disconnects valve electronic valve's circuit through a relay. More specifically: this example is substantially the same as example 2, heating circuit, water flow loop and total circuit protection's structure are the same, main difference is: use control board 7' to replace above mentioned control board 7. Besides relay unit, microprocessor (MCU), timing unit and power supply unit on control board 7', it also has a temperature detection unit, connect to a temperature sensor 8, to collect temperature inside water flow pipe.Furthermore, it has a display unit, connect to a display screen 9, and is used to display information such as control and setting etc. To users. In addition, through internal control program, MCU on this control board 7' can evaluate synthetically base on collected first microswitch il's switching signal and temperature sensor 8's temperature value signal, then control relay to cut off water flow loop. The preferred control method is: when one of any two conditions is finished first, then immediately control relay to cut off water flow loop, two conditions include timing is finished, or temperature is lower than setting value. This combination of temperature control and timer to delay water shut down proposal's advantage is: synthetically evaluate timing and temperature condition and delay water shut down, more accurate and scientific, furthermore, when any one of these two conditions fail, it will not affect the water phase shut down control, more secure.
Although combined examples and introduction to describe this invention, technical people in this industry should understand, within the spirit and scope of the present invention without departing from attached patent claim, any change to this invention in the form or details, is under protection scope of this invention.
Claims (15)
- CLAIMS1. Instant electric water heater has one external cover, its external cover at least has gear knobs, and its internal structure at least includes water flow pipes, electric heating elements, and flow electronic control valve. Electric heating power elements use electricity to heat water inside hot water flow pipe, flow electronic control valve controls water stop/start inside water flow pipe. Its main feature is described gear knobs at least have 2 mechanical contact switches, rotate them to different position to contact with above mentioned mechanical contact switches and achieve different switch combinations, then achieve on-off control of heating and water flow. Wherein, connect flow electronic control valve's circuit's mechanical contact switch to a delay control unit, to achieve delay shut off of flow electronic control valve's circuit, and achieve flow delay shutdown (phase shut down) control of electric water heater.
- 2. Instant electric water heater according to right claim 1, its feature is: mentioned delay control unit is realize by temperature control delay, details include: firstly parallel one opened temperature control switch and flow electronic control valve's circuit's mechanical contact switch, then series circuit to flow electronic control valve's circuit, this temperature control switch is collecting temperature change and connect or disconnect to one of low electronic control valve's circuit.
- 3. Instant electric water heater according to right claim 1, its feature is: described delay control unit is realized by delay timer, details include: series circuit a control board to flow electronic control valve's circuit's mechanical contact switch, then series circuit to flow electronic control valve's circuit, this control board use flow electronic control valve's circuit's mechanical contact switch as trigger signal, use control board to start time control base on this trigger signal, after timing is complete, control board connects or disconnects valve electronic valve's circuit through relay.
- 4. Instant electric water heater according to right claim 1, its feature is: described delay control unit is the combination of temperature control and timer, details include: series circuit a control board to flow electronic control valve's circuit's mechanical contact switch, then series circuit to flow electronic control valve's circuit, this control board use flow electronic control valve's circuit's mechanical contact switch as trigger signal, and control board use a temperature detector to collect temperature change information, use control board to start time control base on this trigger signal, control board evaluates synthetically after timing complete and/or collected temperature, then connects or disconnects valve electronic valve's circuit through a relay.
- 5. Instant electric water heater according to right claim 3 or 4, its feature is: described control board and display unit, connect to a display screen, use for display control and information setting.
- 6. Instant electric water heater according to right claim 1 or 2 or 3 or 4, its feature is: described gear knob at least includes a knob dial base, knob spindle, dial boss, upper microswitch cover, 2pcs or above mechanical contact switches. Knob spindle is fixed to top of dial boss, dial boss's bottom is inserted into knob dial base, then knob spindle can drive dial boss to rotate knob dial base. Upper microswitch cover is fixed on the knob dial base, switch cover is to fix above mentioned mechanical contact switches, and help dial boss move to the proper setting position, different contact point can touch to the corresponding mechanical contact switches and let it connects.
- 7. Instant electric water heater according to right claim 6, its feature is: described gear knob has U shape elastic part, this U shape elastic part is fixed on upper switch cover, to clip on knob spindle, to limit its rotation position.
- 8. Instant electric water heater according to right claim 7, its feature is: described gear knob's base has pressure pop up structure.
- 9. Instant electric water heater according to right claim 1 or 2 or 3 or 4, its feature is: described gear knob includes 2 heating power setting, 1 turn off setting and 1 cold water setting, as I, II, Cold and Oft settings respectively. Inside gear knob, there are 3 mechanical contact switches, one is used to control flow electronic valve's circuit, the other two are used to control 2 heating functions' electric elements' circuit, turn on/oft status' control is: * When gear knob is rotated to Off position, control and connect flow electronic valve's circuit's first mechanical contact switch, control and connect first heating element's circuit's second mechanical contact switch, control and connect second heating element's circuit's third mechanical contact switch, all of three are disconnected.* When gear knob is rotated to Cold position, control and connect flow electronic valve's circuit's first mechanical contact switch is connected, control and connect first heating element's circuit's second mechanical contact switch, control and connect second heating element's circuit's third mechanical contact switch, all of two are disconnected.* When gear knob is rotated to I position, control and connect flow electronic valve's circuit's first mechanical contact switch, control and connect first healing element's circuit's second mechanical contact switch are connected, control and connect second heating element's circuit's third mechanical contact switch is disconnected.* When gear knob is rotated to II position, control and connect flow electronic valve's circuit's first mechanical contact switch, control and connect first heating element's circuit's second mechanical contact switch, control and connect second heating element's circuit's third mechanical contact switch, all of three are connected.
- 10. Instant electric water heater according to right claim 6, its feature is: described gear knob includes 2 heating power setting, 1 turn off setting and 1 cold water setting, as I, II, Cold and Off settings respectively. Inside gear knob, there are 3 mechanical contact switches, one is used to control flow electronic valve's circuit, the other two are used to control 2 heating functions' electric elements' circuit, turn on/off status' control is: * When gear knob is rotated to Off position, control and connect flow electronic valve's circuit's first mechanical contact switch, control and connect first heating element's circuit's second mechanical contact switch, control and connect second heating element's circuit's third mechanical contact switch, all of three are disconnected.* When gear knob is rotated to Cold position, control and connect flow electronic valve's circuit's first mechanical contact switch is connected, control and connect first heating element's circuit's second mechanical contact switch, control and connect second heating element's circuit's third mechanical contact switch, all of two are disconnected.* When gear knob is rotated to I position, control and connect flow electronic valve's circuit's first mechanical contact switch, control and connect first heating element's circuit's second mechanical contact switch are connected, control and connect second heating element's circuit's third mechanical contact switch is disconnected.* When gear knob is rotated to II position, control and connect flow electronic valve's circuit's first mechanical contact switch, control and connect first heating element's circuit's second mechanical contact switch, control and connect second heating element's circuit's third mechanical contact switch, all of three are connected.
- 11. Instant electric water heater according to right claim 7, its feature is: described gear knob includes 2 heating power setting, 1 turn off setting and 1 cold water setting, as I, II, Cold and Off settings respectively. Inside gear knob, there are 3 mechanical contact switches, one is used to control flow electronic valve's circuit, the other two are used to control 2 heating functions' electric elements' circuit, turn on/off status' control is: * When gear knob is rotated to Off position, control and connect flow electronic valve's circuit's first mechanical contact switch, control and connect first heating element's circuit's second mechanical contact switch, control and connect second heating element's circuit's third mechanical contact switch, all of three are disconnected.* When gear knob is rotated to Cold position, control and connect flow electronic valve's circuit's first mechanical contact switch is connected, control and connect first heating element's circuit's second mechanical contact switch, control and connect second heating element's circuit's third mechanical contact switch, all of two are disconnected.* When gear knob is rotated to I position, control and connect flow electronic valve's circuit's first mechanical contact switch, control and connect first heating element's circuit's second mechanical contact switch are connected, control and connect second heating element's circuit's third mechanical contact switch is disconnected.* When gear knob is rotated to II position, control and connect flow electronic valve's circuit's first mechanical contact switch, control and connect first heating element's circuit's second mechanical contact switch, control and connect second heating element's circuit's third mechanical contact switch, all of three are connected.
- 12. Instant electric water heater according to right claim 8, its feature is: described gear knob includes 2 heating power setting, 1 turn off setting and 1 cold water setting, as I, II, Cold and Off settings respectively. Inside gear knob, there are S mechanical contact switches, one is used to control flow electronic valve's circuit, the other two are used to control 2 heating functions' electric elements' circuit, turn on/off status' control is: * When gear knob is rotated to Off position, control and connect flow electronic valve's circuit's first mechanical contact switch, control and connect first heating element's circuit's second mechanical contact switch, control and connect second heating element's circuit's third mechanical contact switch, all of three are disconnected.* When gear knob is rotated to Cold position, control and connect flow electronic valve's circuit's first mechanical contact switch is connected, control and connect first heating element's circuit's second mechanical contact switch, control and connect second heating element's circuit's third mechanical contact switch, all of two are disconnected.* When gear knob is rotated to I position, control and connect flow electronic valve's circuit's first mechanical contact switch, control and connect first heating element's circuit's second mechanical contact switch are connected, control and connect second heating element's circuit's third mechanical contact switch is disconnected.* When gear knob is rotated to II position, control and connect flow electronic valve's circuit's first mechanical contact switch, control and connect first heating element's circuit's second mechanical contact switch, control and connect second heating element's circuit's third mechanical contact switch, all of three are connected.
- 13. Instant electric water heater according to right claim 1 or 2 or 3 or 4, its feature is: described mechanical contact switch is microswitch.
- 14. Instant electric water heater according to right claim 1 or 2 or 3 or 4, its feature is: described flow electronic control valve is solenoid valve.
- 15. Instant electric water heater according to right claim 1 or 2 or 3 or 4, its feature is: described heating element is heating pipe.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310062844.4A CN103075811B (en) | 2013-02-28 | 2013-02-28 | Direct-heating type electric heater |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB201309281D0 GB201309281D0 (en) | 2013-07-10 |
| GB2511368A true GB2511368A (en) | 2014-09-03 |
| GB2511368B GB2511368B (en) | 2016-05-04 |
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ID=48152430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1309281.2A Active GB2511368B (en) | 2013-02-28 | 2013-05-23 | Instant electric water heater |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103075811B (en) |
| GB (1) | GB2511368B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105202769A (en) * | 2015-10-09 | 2015-12-30 | 六安市同心畅能电子科技有限公司 | Forced exhaust type gas water heater shower room faucet preheating device |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103075811B (en) * | 2013-02-28 | 2016-01-06 | 厦门帅科卫浴电器有限公司 | Direct-heating type electric heater |
| CN103940076B (en) * | 2014-05-09 | 2016-09-14 | 卓元廉 | Miniature water-heater |
| CN106440395B (en) * | 2016-12-09 | 2021-11-23 | 厦门阿玛苏电子卫浴有限公司 | Switch device applied to instant electric water heater |
| CN108302756A (en) * | 2017-01-13 | 2018-07-20 | 中山市艾菲尔电器有限公司 | A kind of adjustable heat generating device of instant heating type temperature |
| DE102017000438A1 (en) | 2017-01-19 | 2018-07-19 | Stiebel Eltron Gmbh & Co. Kg | Safety device for emergency shutdown of an electric instantaneous water heater |
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|---|---|---|---|---|
| GB2007046A (en) * | 1977-07-21 | 1979-05-10 | Dolphin Showers Ltd | Electric water heaters |
| GB2319831A (en) * | 1996-11-30 | 1998-06-03 | Basic Patents | Safety system for instantaneous water heaters |
| GB2341667A (en) * | 1998-09-19 | 2000-03-22 | Caradon Mira Ltd | An instantaneous water heater with an on-off valve to control power and water supply |
| CN202057059U (en) * | 2010-12-17 | 2011-11-30 | 深圳市世惠之家电器有限公司 | Changeover switch for adjusting power of electric water heater |
| CN103075811A (en) * | 2013-02-28 | 2013-05-01 | 侯全舵 | Direct heating type electric water heater |
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| CN2175377Y (en) * | 1993-10-27 | 1994-08-24 | 陈永华 | Wire controlling device dor directly heating type gas water heater |
| CN1920437A (en) * | 2005-08-25 | 2007-02-28 | 王焱 | Energy-saving control method for electric heater and electric heating system thereof |
| BRPI0905319B1 (en) * | 2009-12-04 | 2020-09-24 | Cláudio Lourenço Lorenzetti | IMPROVEMENT IN ELECTRIC SHOWER |
| CN202002328U (en) * | 2011-04-19 | 2011-10-05 | 徐菲 | Water-saving device of water heater |
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- 2013-02-28 CN CN201310062844.4A patent/CN103075811B/en active Active
- 2013-05-23 GB GB1309281.2A patent/GB2511368B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2007046A (en) * | 1977-07-21 | 1979-05-10 | Dolphin Showers Ltd | Electric water heaters |
| GB2319831A (en) * | 1996-11-30 | 1998-06-03 | Basic Patents | Safety system for instantaneous water heaters |
| GB2341667A (en) * | 1998-09-19 | 2000-03-22 | Caradon Mira Ltd | An instantaneous water heater with an on-off valve to control power and water supply |
| CN202057059U (en) * | 2010-12-17 | 2011-11-30 | 深圳市世惠之家电器有限公司 | Changeover switch for adjusting power of electric water heater |
| CN103075811A (en) * | 2013-02-28 | 2013-05-01 | 侯全舵 | Direct heating type electric water heater |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105202769A (en) * | 2015-10-09 | 2015-12-30 | 六安市同心畅能电子科技有限公司 | Forced exhaust type gas water heater shower room faucet preheating device |
| CN105202769B (en) * | 2015-10-09 | 2017-11-17 | 六安市同心畅能电子科技有限公司 | Forced-ventilated gas water heater shower house tap preheating device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103075811B (en) | 2016-01-06 |
| CN103075811A (en) | 2013-05-01 |
| GB201309281D0 (en) | 2013-07-10 |
| GB2511368B (en) | 2016-05-04 |
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