CN203785271U - Liquid heating device with power adjustable - Google Patents
Liquid heating device with power adjustable Download PDFInfo
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- CN203785271U CN203785271U CN201320897137.2U CN201320897137U CN203785271U CN 203785271 U CN203785271 U CN 203785271U CN 201320897137 U CN201320897137 U CN 201320897137U CN 203785271 U CN203785271 U CN 203785271U
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 130
- 239000007788 liquid Substances 0.000 title claims abstract description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 112
- 238000001514 detection method Methods 0.000 claims description 14
- 230000002457 bidirectional effect Effects 0.000 claims description 7
- 238000009413 insulation Methods 0.000 claims description 3
- 238000009835 boiling Methods 0.000 abstract description 10
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000000630 rising effect Effects 0.000 description 4
- 238000005485 electric heating Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000003020 moisturizing effect Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
- Control Of Resistance Heating (AREA)
Abstract
The utility model discloses a liquid heating device with power adjustable and a power control circuit of the liquid heating device. The liquid heating device and the power control circuit are applied to the field of liquid heaters such as electric water boilers and electric water heaters. Power can be intelligently and automatically adjusted according to different heating stages of the liquid heating device. A relay on a circuit board and a triac on the circuit board are connected in parallel, and the triac and the relay is intelligently controlled to be switched and used alternately in different heating stages of the liquid heating device according to the calculation result of an embedded chip. Therefore, when the liquid heating device runs in a full power mode, switching is carried out so that the low-cost relay can be used for having control over start and shutdown of the heating device, and when the liquid heating device runs in a low power mode, switching is carried out so that the low-current triac can be used for having control over start and shutdown of a heating tube. Due to the fact that calculation is carried out through software, the embedded chip and a control circuit, the liquid heating device has the function that power is adjustable and is high in reliability and low in cost, energy consumption is reduced, repeated boiling is avoided, and the phenomenon that health of a user is influenced by precipitated heavy metal generated due to repeated boiling is avoided.
Description
Technical field
The utility model patent relates to a kind of liquid heater equipment, specifically, relating to one can be combined into power control group by relay and three sections of bidirectional triode thyristors, carries out electric water boiler, water dispenser and control circuit thereof and the control method of adjustment power in the different heating operation phase.
Background technology
The current liquid heater such as electric water boiler, water dispenser duty is generally divided into heating period and holding stage.In the heating period, water heating reaches the highest set temperature shuts down, and enters holding stage.Generate heat by control heater part at holding stage or stop heating and keep water temperature within the limits prescribed.No matter this series products is heating period or holding stage at present, electrical heating elements is to be all that 100% power heats with power maximum.
But this series products is in heating process, if design temperature is greater than 90 degree, or while approaching boiling temperature, can produce a large amount of steam, and outside tapping equipment, the waste courage energy, also makes the water excessive boiling in inner bag water tank and repeatedly seethes with excitement, and separates out the material that heavy metal etc. is harmful to health.
In insulating process, actual needs less energy, and this series products still uses 100% power heating, although the heat time is of short duration, but full power heating still can make water boiling again, forms thousand boiling water, and generation steam, consumes a large amount of electric energy.
Electric water-boiling device and water dispenser power are all higher, and low 800W left and right is more than high employing 3 cross streams electric power supply power can reach 10KW, even higher.
If directly adopt the adjustment of triode ac switch power ratio control, the control circuit load needing is larger, and it is very large that area of dissipation need to design.By high power triode ac switch circuit control heater part, the electric current of controlling during due to full power moves greatly easy break-down, and needs larger components and parts to produce high circuit cost.
Summary of the invention
The utility model aims to provide a kind of with low cost, utilize triode ac switch and the relay parallel connection of little electric current, by liquid heating described in embedded chip Based Intelligent Control the triode ac switch in each stage of stepping water heating and the switching of relay be used alternatingly, thereby low cost and a kind of stepping water liquid heating apparatus of realizing power-adjustable of high reliability.
The utility model can make described liquid heating apparatus in the time that the heating period, water temperature was closed on set temperature point, control and power control circuit adjustment heating power by operation, be reduced to a less performance number from full power, thereby reduce the generation of excessive boiling and steam.At holding stage, power is reduced to a lower-wattage value, thereby reduces energy loss and repeatedly boiling.
The utility model is used alternatingly by the parallel connection of triode ac switch and relay, while making described liquid heating need large electric current in circuit, use relay element control heater part, and under small-power, use triode ac switch control heater part, and by the control of software and embedded intelligent chip and control circuit, make device there is power adjustable function, and make device there is high reliability and low cost.Thereby there is promotional value in enormous quantities.By power-adjustable, at heating period and holding stage, low-power operation, reduces energy consumption and avoids the heavy metal that repeatedly seethes with excitement and produce to separate out unhealthful.
The liquid heating apparatus that described power is adjustable, comprises shell, inner bag, heater, temperature sensor, high water level sensor, low water level sensor, magnetic valve, power supply and signal lead, operation control and power control circuit board, relay, triode ac switch etc.Inner bag is positioned at shell, and heater element and temperature sensor, high water level sensor, low water level sensor are arranged on inner bag the inside.
Operation is controlled and power control circuit board is arranged between inner bag and shell.On control and power control circuit board, triode ac switch, relay are installed.
Heater, magnetic valve, temperature sensor, high water level sensor, low water level sensor are connected with power control circuit board with operation control with signal lead by power supply, and are connected in external power source.Wherein high water level sensor is installed on the top of inner bag, for detection of the high water level arranging.Magnetic valve by pipeline by water from device pipeline introduce inner bag.
Operation is controlled with power control circuit board and is comprised inserted computer chip, temperature sensing circuit, water level detection circuit, the formations such as one group relay and one group of triode ac switch, computer chip is connected with relay and triode ac switch with power control circuit board with described operation control by peripheral circuit.
It can be to be incorporated on a circuit board that operation is controlled with power control circuit, can be also that power control circuit separates with running control circuit, is positioned at each other on different circuit boards.Its another kind of application form of described relay in the utility model can be other switch elements such as A.C. contactor.Described heater in the utility model, can be heating tube, can be also heating film or heater strip; Heating tube can comprise a heater strip, also can comprise many heater strips.
In described operation control and power control circuit board, in circuit, compose in parallel a power control group by corresponding one by one to 1 relay and 1 triode ac switch; Described operation control and power control circuit board can, according to the concrete heater quantity using of described liquid heating, arrange 1 or several power control group.On every heating tube or a heating tube every heater strip independently, its break-make is by a relay and 1 power control group co-controlling that triode ac switch forms parallel with one another, and this heater strip is also connected and is connected with described power packages and power supply by wire.In the time that relay is worked, triode ac switch is closed; In the time that triode ac switch is worked, cut-off.
In the situation that heater is provided with many heating tubes or a multiple heater strip of heating tube, another kind of mode of the present utility model is, on operation control and power control circuit board, a power packages is only set, only control in wherein 1 single-phase heating tube or described many heater strips, and other heating tubes or heater strip pass through Control.
Inserted computer chip is according to the residing working stage of liquid heating described in temperature sensing circuit and water level detection circuit etc. and software program intelligent decision, mutual switching between control relay and triode ac switch, simultaneously according to the performance number of built-in setting in inserted computer chip, by the output power value adjustment of signal controlling triode ac switch.
Built-in software adds thermal control according to the calculation of parameter of high water level sensor, low water level sensor, temperature sensor and temperature sensing circuit, water level detection circuit and by following three phases:
First stage: stepping water heating period
The liquid heating apparatus that described power is adjustable, after water level reaches low water level position and detected by low water level sensor, magnetic valve quits work, and heater element 100% power is full power heating.At this moment circuit, in Control heating element heater state, adopts the connection of Control heating element heater, and three sections of control circuit of bidirectional thyristor are in closed condition.When detecting water temperature, temperature sensor reaches after set temperature, magnetic valve is opened into water, when water temperature in inner bag lower than arrange stop inflow temperature time, closed electromagnetic valve, heater still heats with Control full power, so step-by-step system circulation water inlet and heating, until magnetic valve is opened into water to high water level sensor present position, proceeds to second stage.
Second stage: step water inlet end heating period
In the time reaching high water level in water level water inlet process, add and hanker water temperature as raise while reaching first set temperature value, circuit control is according to first middle power controlling value power work; In the time reaching second set temperature, according to second middle power value heating; While reaching the 3rd set temperature, according to the 3rd middle power value heating, the rest may be inferred.
Concrete method is: in the time reaching high water level sensor position in water level water inlet process, add and hanker water temperature as reached first desired temperature between 90 to 97 degrees Celsius time, its preferred value of this temperature value is 97 degree, circuit control is according to the power work of setting, this setting power value is as first middle power controlling value, first described middle power controlling value can be full power 0% to 99% between certain value, its preferred value is 50%.
Continue rising in water temperature and reach second desired temperature between 90 to 99 degree, second desired temperature is higher than first desired temperature, this value is preferably 98 degrees Celsius, circuit control is according to second the middle power controlling value work of setting, second described middle power controlling value can be full power 0% to 99% between certain value, but be equal to or less than first middle power controlling value, its preferred value is 25%.
In the time that water temperature continuation rising reaches the 3rd desired temperature between 90 to 99 degree, the 3rd desired temperature is higher than second desired temperature, this value is preferably 99 degrees Celsius, circuit control is according to the 3rd the middle power controlling value work of setting, three described middle power controlling values can be full power 0% to 97% between certain value, but be equal to or less than second middle power controlling value, its preferred value is 10%.
This stage circuitry cuts relay work, be switched to triode ac switch state of a control, the work of control heater part, and by operation control and inserted computer chip, circuit and software this stage of adjustment of power control circuit board described in the performance number that needs when interval of different temperatures, control the dutycycle of triode ac switch, thus the power output of control heater part.
Phase III: holding stage
When water level reaches high water level sensor position and reaches after the maximum temperature of setting through water level electric circuit inspection, device described in the utility model enters the keeping warm mode stage.At this moment, heating power controlling value be full power 0% to 50% between certain value, as insulation performance number, its preferred value is 10%.
Still block system relay of this stage, by triode ac switch control heater part power output.
As user's water intaking, inner bag water level will depart from high water level sensor.If now again open magnetic valve water inlet moisturizing, circuit switches back relay duty, stop the work of triode ac switch, and carry out the power control flow of the above corresponding heating period according to the residing heating period circulation of described liquid heating.
Brief description of the drawings
Fig. 1: the liquid heating apparatus and the power control circuit pie graph thereof that adopt mono-heating tube of three-phase 380V
Fig. 2: the liquid heating apparatus and the power control circuit pie graph thereof that adopt mono-heating tube of single-phase 220V
Fig. 3: the liquid heating apparatus and the power control circuit pie graph thereof that adopt tri-heating tubes of single-phase 380V
Fig. 4: three heating period temperature Poewr control methods and flow chart
Fig. 5: operation is controlled and power control circuit board circuit diagram: three-phase 380V power mode
Fig. 6: operation is controlled and power control circuit board circuit diagram: 220V single phase poaer supply mode one
Fig. 7: operation is controlled and power control circuit board circuit diagram: 220V single phase poaer supply mode two
1 shell
2 inner bags
3 heaters
4 magnetic valves
5 power supplys and signal lead
6 operations are controlled and power control circuit board
7 high water level sensor
8 low water level sensors
9 temperature sensors
10 relays
11. triode ac switch
Detailed description of the invention
Embodiment mono-:
The liquid heating apparatus that described power is adjustable, comprises shell 1, inner bag 2, heater 3, magnetic valve 4, power supply and signal lead 5, operation control and power control circuit board 6, high water level sensor 7, low water level sensor 8, temperature sensor 9 etc.
Inner bag 2 is positioned at shell 1, and heater 3 and high water level sensor 7, low water level sensor 8, temperature sensor 9 are arranged on inner bag 2 the insides.Magnetic valve 4, power supply and signal lead 5, operation control and power control circuit board 6 is arranged between shell 1 and inner bag 2.
Heater 3 is controlled and is connected with power control circuit board 6 with operation with signal lead 5 by power supply with magnetic valve 4.Temperature sensor 9 is controlled and is connected with power control panel 6 with operation with signal lead 5 by power supply with high water level sensor 7, low water level sensor 8.Wherein high water level sensor 7 is installed on the top of inner bag 2, for detection of the high water level arranging.
Operation is controlled with power control circuit board 6 and is comprised the formations such as inserted computer chip, temperature sensing circuit, water level detection circuit, a group relay 10 and one group of triode ac switch 11, computer chip is connected with temperature sensing circuit, water level detection circuit etc. with signal lead 5 by peripheral circuit and power supply, and is connected with relay 10 and triode ac switch 11.
Fig. 5, Fig. 6, Figure 7 shows that the electrical schematic diagram that the power control section of described operation control and power control circuit board 6 is divided.RA1, RA2, RA3, RA4, RA5, RA6 are respectively and are arranged on operation and control the I/O mouth that is connected with the inserted computer chip of the operation control section on power control circuit board 6.
As shown in Fig. 5, Fig. 6, Fig. 7, in described operation control and power control circuit board 6, in circuit, compose in parallel 1 power control group by corresponding one by one 10 and 1 triode ac switch 11 of 1 relay; Described operation control and power control circuit board 6 can, according to concrete heater 3 quantity that use of described liquid heating, arrange 1 or several power control group.
It can be to be incorporated on a circuit board that operation is controlled with power control circuit board 6, can be also that power control circuit separates with running control circuit, is positioned at each other on different circuit boards.
Described relay 10 its another kind of application forms in the utility model can be other switch elements such as A.C. contactor.
Described heater 3 in the utility model, can be heating tube, can be also heating film or heater strip; Heater element 3 can be single electric heating tube, can be also many electric heating tubes; It can also be an electric heating tube of the multiple resistive heaters independent of each other of distribution.
As Fig. 5, Fig. 6 and Fig. 7, on every heating tube of heater element 3 or a heating tube every heater strip independently, its break-make is by a relay 10 and 1 power control group co-controlling that triode ac switch 11 forms parallel with one another, and this heater strip is also connected and is connected with described power packages and power supply by wire.In the time that relay 10 is worked, triode ac switch 11 is closed; In the time that triode ac switch 11 is worked, relay 10 cuts out.The power supply that device adopts as shown in Figure 6 and Figure 7 can be 220V single-phase alternating current, and the heater 3 adopting like this may be 1 heating tube, as shown shown in 2; Another kind of embodiment of the present utility model is several heating tubes in parallel, as shown in Figure 3.
As shown in Figure 1 and Figure 5, the power supply that device adopts can be also three-phase 380V alternating current, and the heater 3 of employing may be 1 heating tube, and 3 heater strips that distribute on this heating tube are connected to control device and power supply by triangle or wye connection.According to power and load needs, can be also that several heating tubes are in parallel uses.
In the situation that heater 3 is provided with many heating tubes or a multiple heater strip of heating tube, another kind of embodiment of the present utility model is, on operation control and power control circuit board 6, a power packages is only set, only control in wherein 1 single-phase heating tube of control device 3 wherein or described many heater strips, and other heating tubes or heater strip are controlled by relay 10.
As shown in Fig. 5, Fig. 6, Fig. 7, inserted computer chip is according to temperature sensing circuit and water level detection circuit etc. and the residing working stage of this liquid heating of software program intelligent decision, by the mutual switching between described each I/O mouth signal control relay 10 and triode ac switch 11, simultaneously according to the performance number of built-in setting in inserted computer chip, by the output power value of signal intelligent control triode ac switch 11 and then control heater 3.
As shown in Figure 4, built-in software adds thermal control according to the calculation of parameter of high water level sensor 7, low water level sensor 8, temperature sensor 9 and temperature sensing circuit, water level detection circuit and by following three heating periods:
First stage: stepping water heating period
Described liquid heating apparatus, after water level reaches low water level position and detected by low water level sensor 8, magnetic valve 4 quits work, and heater 3 is full power heating with 100% power.At this moment circuit, in relay 10 control heater part 3 states, adopts the connection of relay 10 control heater parts 3, and three sections of bidirectional triode thyristor 11 control circuits are in closed condition.When detecting water temperature, temperature sensor 9 reaches after set temperature, magnetic valve 4 is opened into water, when the interior water temperature of inner bag 2 lower than arrange stop inflow temperature time, magnetic valve 4 cuts out, heater 3 is still controlled full power heating with relay 10, so step-by-step system heating, until magnetic valve 4 is opened into water to high water level sensor 7 present positions, proceeds to second stage.
Second stage: step water inlet end heating period
In the time reaching high water level sensor 7 position in water level water inlet process, add and hanker water temperature as reached first desired temperature between 90 to 97 degrees Celsius time, its preferred value of this temperature value is 97 degree, circuit control is according to the power work of setting, this setting power value is as first middle power controlling value, first described middle power controlling value can be full power 0% to 99% between certain value, its preferred value is 50%.
Continue rising in water temperature and reach second desired temperature between 90 to 99 degree, second desired temperature is higher than first desired temperature, this value is preferably 98 degrees Celsius, circuit control is according to second the middle power controlling value work of setting, second described middle power controlling value can be full power 0% to 99% between certain value, but be equal to or less than first middle power controlling value, its preferred value is 25%.
In the time that water temperature continuation rising reaches the 3rd desired temperature between 90 to 99 degree, the 3rd desired temperature is higher than second desired temperature, this value is preferably 99 degrees Celsius, circuit control is according to the 3rd the middle power controlling value work of setting, three described middle power controlling values can be full power 0% to 97% between certain value, but be equal to or less than second middle power controlling value, its preferred value is 10%.
This stage circuitry cuts relay 10 is worked, be switched to triode ac switch 11 state of a controls, controlling heater 3 works, and by operation control and inserted computer chip, circuit and software this stage of adjustment of power control circuit board 6 described in the performance number that needs when interval of different temperatures, control the dutycycle of triode ac switch 11, thereby control the power output of heater 3.
Phase III: holding stage
When water level reaches high water level sensor position and reaches after the maximum temperature of setting through water level electric circuit inspection, device described in the utility model enters the keeping warm mode stage.At this moment, heating power controlling value be full power 0% to 50% between certain value, its preferred value is 10%.
This stage is block system relay 10 still, controls heater 3 power outputs by triode ac switch 11.As user's water intaking, the interior water level of inner bag 2 will depart from high water level sensor 7.If now again open magnetic valve 4 moisturizing of intaking, circuit switches back relay 10 duties, stop the work of triode ac switch 11, and carry out the power control flow of first, second or phase III of the above corresponding device heating according to the circulation of residing heating period of described liquid heating.
Embodiment bis-: above-mentioned relay 10 is A.C. contactor or triode ac switch.
Embodiment tri-: above-mentioned triode ac switch 11 is the nonadjustable triode ac switch of performance number.
Embodiment tetra-: described operation control and power control circuit board 6, its running control circuit plate and power control circuit board 6 are circuit boards of two independent separate, common composition operation is controlled and power control circuit board 6.
Embodiment five: built-in software is also controlled according to the calculation of parameter of high water level sensor 7, low water level sensor 8, temperature sensor 9 and temperature sensing circuit, water level detection circuit:
The desired temperature of described first stage stepping water heating period, second stage stepping water heating ending phase and phase III holding stage, the desired temperature in its each stage can be 1, also it can be 2,3, also can be 3 above multiple desired temperatures, and arrange according to the quantity of desired temperature that corresponding multiple middle power controlling values are controlled heating by three sections of bidirectional triode thyristors 11 or full power is controlled heating by relay 10.
The utility model can be widely used in the liquid heater such as electric water-boiling device, water dispenser field, inventive point of the present utility model is relay 10 and triode ac switch 11 parallel connections and forms one or more power control groups of alternation, jointly control the heating of heater element, the water in inner bag 2 is adjusted the size of heater 3 output power values by power-adjustable control circuit in the different heating periods.Simultaneously, according to this device heating feature of heating period and holding stage, by power control group, set respectively the performance number different with controlling output, to reach the object of the three sections of bidirectional triode thyristor Based Intelligent Control power-adjustable heating of small-power that use low cost and high reliability, thereby reduce energy consumption and the hygienic quality risk of excessively or repeatedly seething with excitement and producing.
Claims (14)
1. the adjustable liquid heating apparatus of power, comprises shell, inner bag, heater, magnetic valve, power supply and signal lead, high water level sensor, low water level sensor, temperature sensor; Inner bag is positioned at shell, heater element and high water level sensor, low water level sensor, temperature sensor are arranged on inner bag the inside, it is characterized in that: also there is an operation and control and power control circuit board, be arranged between shell and inner bag and be connected with temperature sensor, magnetic valve with heater element, water level with signal lead by power supply with magnetic valve, power supply and signal lead.
2. liquid heating apparatus according to claim 1, it is characterized in that: operation is controlled and power control circuit board comprises inserted computer chip, temperature sensing circuit, water level detection circuit, a group relay and one group of triode ac switch, and computer chip is connected with bidirectional triode thyristor with testing circuit and relay by circuit.
3. liquid heating apparatus according to claim 2, it is characterized in that: described inserted computer chip is according to temperature sensing circuit and residing heating period of water level detection circuit intelligent decision heater, the switching of control relay and triode ac switch, simultaneously according to built-in definite power ratio control value in inserted computer chip, by the output power value of signal controlling triode ac switch output signal and then control heater.
4. liquid heating apparatus according to claim 2, is characterized in that: described relay and triac compose in parallel a power control group in control circuit; Operation is controlled and power control circuit board is the circuit board of one or operation two circuit boards independently of controlling that control separates with power.
5. liquid heating apparatus according to claim 1 and 2, is characterized in that: heater is one or many heating tubes; In heating tube, comprise one or many heater strips.
6. liquid heating apparatus according to claim 5, it is characterized in that: the power control group that every heating tube forms by a relay parallel with one another and reverse-blocking tetrode thyristor is controlled, and be connected by wire with bidirectional triode thyristor with this relay, in the time that relay is worked, triode ac switch is closed, in the time that triode ac switch is worked, cut-off.
7. liquid heating apparatus according to claim 6, it is characterized in that: described heater adopts three-phase 380V power supply, be provided with 1 heating tube, it comprises 3 heater strips, the power control group that every heater strip forms by a relay parallel with one another and reverse-blocking tetrode thyristor is controlled, and 3 heater strips of this heating tube are connected by wire respectively with the power packages that 3 group relaies form with triode ac switch; In the time that relay is worked, triode ac switch is closed; In the time that triode ac switch is worked, cut-off.
8. liquid heating apparatus according to claim 6, it is characterized in that: described heater adopts three-phase 380V power supply, be provided with three heating tubes, the power control group that every heating tube forms by a relay parallel with one another and reverse-blocking tetrode thyristor is controlled, and is connected by wire respectively; In the time that relay is worked, triode ac switch is closed, in the time that triode ac switch is worked, and cut-off.
9. liquid heating apparatus according to claim 6, it is characterized in that: described heater adopts single-phase 220V power supply, be provided with 1 heating tube or many heating tube parallel connections, the power control group that every heating tube forms by a relay parallel with one another and reverse-blocking tetrode thyristor is controlled, and is connected by wire respectively; In the time that relay is worked, triode ac switch is closed; In the time that triode ac switch is worked, cut-off.
10. liquid heating apparatus according to claim 6, it is characterized in that: heater adopts single-phase 220V power supply, be provided with many heating tubes in parallel, the power control group that 1 heating tube is wherein made up of a relay parallel with one another and reverse-blocking tetrode thyristor is controlled, and is connected by wire; In the time that relay is worked, triode ac switch is closed; In the time that triode ac switch is worked, cut-off, other heating tubes pass through Control.
11. according to the liquid heating apparatus described in claim 2 or 3, it is characterized in that: described computer chip is logical according to the calculation of parameter of level sensor, temperature sensor and temperature and water level detection circuit, when being controlled at heating and approaching the highest design temperature, be switched to triode ac switch, and downwards Modulating Power to 0 to a middle power controlling value between peak power, and the control of closed relay.
12. according to liquid heating apparatus described in claim 2 or 3, it is characterized in that: described computer chip is according to the calculation of parameter of level sensor, temperature sensor and temperature and water level detection circuit, be controlled at liquid heating in the time of the keeping warm mode stage, be switched to triode ac switch control, the control of closed relay simultaneously, and adjust heater element power to 0 downwards to the insulation power control value between peak power.
13. liquid heating apparatus according to claim 11, is characterized in that: described middle power controlling value is 1 value or along with temperature constantly raises, the multiple power control values that arrange respectively according to different temperature.
14. liquid heating apparatus according to claim 12, is characterized in that: described insulation power control value is 1 value or along with temperature constantly raises, the multiple power control values that arrange respectively according to different temperature.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320897137.2U CN203785271U (en) | 2013-12-17 | 2013-12-17 | Liquid heating device with power adjustable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320897137.2U CN203785271U (en) | 2013-12-17 | 2013-12-17 | Liquid heating device with power adjustable |
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- 2013-12-17 CN CN201320897137.2U patent/CN203785271U/en not_active Expired - Lifetime
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