CN101762020B - Heating circuit of flowing type instantaneous electric water heater - Google Patents
Heating circuit of flowing type instantaneous electric water heater Download PDFInfo
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- CN101762020B CN101762020B CN2009101556540A CN200910155654A CN101762020B CN 101762020 B CN101762020 B CN 101762020B CN 2009101556540 A CN2009101556540 A CN 2009101556540A CN 200910155654 A CN200910155654 A CN 200910155654A CN 101762020 B CN101762020 B CN 101762020B
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Abstract
The invention discloses a heating circuit of a flowing type instantaneous electric water heater, which comprises a first heating circuit (1) at least comprising a first heating tube, and a control circuit (2) for controlling the heating power of the first heating circuit (1), wherein the control circuit (2) comprises a switching power supply (21), a second filter capacitor, a third filter capacitor, a first normally open relay, a second normally open relay, a first protecting diode, a water flow switch, a bidirectional thyristor, a triggering diode, an alternating current capacitor, a potentiometer with a switch, a first protective resistor, a third protective resistor, a current limiting resistor, an electromagnetic valve and a tristate voltage stabilizer. Compared with the prior art, the heating circuit has the advantages that: the heating power of the first heating tube is adjusted from zero to the maximum heating power of the first heating tube by adjusting the resistance of the potentiometer with the switch; and the heating circuit has the characteristics of simple circuit structure, low cost, and high popularization and application values.
Description
Technical field
The present invention relates to a kind of instant electric water heater's heater circuit, particularly relate to a kind of heater circuit of flowing type instantaneous electric water heater.
Background technology
The applicant is that the Chinese invention patent " a kind of heater circuit of flowing type instantaneous electric water heater " of CN 101285618 has solved when discharge successive heater circuit of the flowing type instantaneous electric water heater of hot-water supply greatly the time in the publication number of on May 6th, 2008 application, after water flow switch is opened, first heater circuit in this heater circuit is in heated condition all the time, mends the switching of circuit temperature and the power of benefit circuit temperature and then controls by mending temperature control circuit.The heater circuit of the flowing type instantaneous electric water heater of above-mentioned patent disclosure has the following disadvantages: after water flow switch is opened, first heater circuit is in running order all the time, that is to say, as long as water flow switch one is opened, first heater circuit is with regard to full power operation, the minimum operating power of whole heater circuit is the power of first heating tube in first heater circuit, and the operating power of first heater circuit is non-adjustable; When summer, weather was warmmer, if the power designs of first heating tube is higher, the temperature of water outlet will soon reach a higher value, if the user does not wish that water temperature is too high, then can not regulate; And if the power designs of first heating tube is lower, in wintry weather cold, interior for a long time water temperature did not also reach ideal value after water flow switch was opened, and can influence user's use yet so.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of operating power of heater circuit can be from zero heater circuit to free adjustable flowing type instantaneous electric water heater the heating tube total power at above-mentioned prior art.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: the heater circuit of this flowing type instantaneous electric water heater includes
At least first heater circuit that comprises first heating tube;
Be used to control the control circuit of the heating power of first heater circuit;
It is characterized in that: described control circuit comprises Switching Power Supply, second filter capacitor, the 3rd filter capacitor, first normally opened relay, second normally opened relay, the first protection diode, water flow switch, bidirectional triode thyristor, diac, ac capacitor, potentiometer with switch, first protective resistance, the 3rd protective resistance, current-limiting resistance, magnetic valve, ternary voltage-stablizer; Wherein link to each other with the live wire of civil power after the switch terminals of the first end of incoming cables connecting band potentiometer with switch of Switching Power Supply, second end of incoming cables of Switching Power Supply links to each other with the zero line of civil power; First end of the first normally opened relay coil links to each other with first leading-out terminal of Switching Power Supply, and second end of the first normally opened relay coil links to each other with first end of water flow switch; First end of the second normally opened relay coil also links to each other with first leading-out terminal of Switching Power Supply, and second end of the second normally opened relay coil also links to each other with first end of water flow switch; The negative pole of the first protection diode links to each other with first leading-out terminal of Switching Power Supply, and second leading-out terminal of Switching Power Supply links to each other with second end of water flow switch; The positive pole of the first protection diode links to each other with first end of first protective resistance, and second end of first protective resistance links to each other with second end of the first normally opened relay coil and second end of the second normally opened relay coil; First end of magnetic valve links to each other with first leading-out terminal of Switching Power Supply, and second end of magnetic valve links to each other with second end of water flow switch; First end of current-limiting resistance links to each other with first leading-out terminal of Switching Power Supply, second end of current-limiting resistance links to each other with the input of ternary voltage-stablizer, the output of ternary voltage-stablizer links to each other with first end of the 3rd filter capacitor, and second end of the 3rd filter capacitor links to each other with second end of water flow switch; The earth terminal of ternary voltage-stablizer also links to each other with second end of water flow switch; First end of second filter capacitor links to each other with second end of current-limiting resistance, and second end of second filter capacitor also links to each other with second end of water flow switch; First end of first heating tube links to each other with the live wire of civil power after connecting the first normally opened relay contact; Second end of first heating tube links to each other with first end of potentiometer with switch, and second end of potentiometer with switch links to each other with first end of ac capacitor, and second end of ac capacitor is connected with the zero line of civil power after connecting the contact of second normally opened relay; First end of bidirectional triode thyristor links to each other with second end of first heating tube; second end of bidirectional triode thyristor is connected with the zero line of civil power after connecting the contact of second normally opened relay; the control end of bidirectional triode thyristor links to each other with first end of diac; second end of diac links to each other with first end of the 3rd protective resistance, and second end of the 3rd protective resistance links to each other with second end of potentiometer with switch.
As improvement, the present invention can also comprise second heater circuit that comprises second heating tube at least, described control circuit can also comprise the 3rd normally opened relay, the second protection diode, second protective resistance, press button with lock, wherein first end of the 3rd normally opened relay coil also links to each other with first leading-out terminal of Switching Power Supply, second end of the 3rd normally opened relay coil connects first end of press button with lock, and second end of press button with lock links to each other with first end of water flow switch; The negative pole of the second protection diode links to each other with first leading-out terminal of Switching Power Supply, and the positive pole of the second protection diode links to each other with first end of second protective resistance, and second end of second protective resistance links to each other with first end of press button with lock; First end of second heating tube links to each other with first end of first heating tube, and second end of second heating tube is connected with the zero line of civil power after connecting the contact of the 3rd normally opened relay.
As improvement, described control circuit can also comprise an overtemperature prote switch, and this overtemperature prote switch is connected between second end of first end of described water flow switch and the first normally opened relay coil.
Described control circuit also comprises the thermal circuit beraker that manually resets, the main body of this hand-reset thermal circuit beraker is installed in the delivery port place in the electric heater, and two normally-closed contacts of this hand-reset thermal circuit beraker are serially connected between first end of incoming cables of the switch terminals of potentiometer with switch and Switching Power Supply.
Compared with prior art, the invention has the advantages that: by the resistance sizes of accommodation zone potentiometer with switch, just can be with the maximum heating power of heating power from zero adjustment to first heating tube of first heating tube, circuit structure of the present invention is simple, cost is low, is fit to apply.
Description of drawings
Fig. 1 is the circuit theory diagrams of the preferred embodiment of the present invention one;
Fig. 2 is the circuit theory diagrams of the preferred embodiment of the present invention two;
Fig. 3 is the circuit theory diagrams of the preferred embodiment of the present invention three;
Fig. 4 is the circuit theory diagrams of the preferred embodiment of the present invention four.
The specific embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
Embodiment one:
The heater circuit of flowing type instantaneous electric water heater as shown in Figure 1 is first preferred embodiment of the present invention, and it comprises first heater circuit 1, be used to control the control circuit 2 of the heating power of first heater circuit 1.Wherein first heater circuit 1 comprises the first heating tube LR1 and the voltmeter V that is used to indicate the first heating tube LR1 operating power that is connected in parallel on the first heating tube LR1 two ends; Control circuit 2 comprises Switching Power Supply 21, the second filter capacitor C2, the 3rd filter capacitor C3, the first normally opened relay J1, the second normally opened relay J2, the first protection diode D1, water flow switch SL, bidirectional triode thyristor BT, diac D3, ac capacitor C4, potentiometer with switch R4, the first protective resistance R1, the 3rd protective resistance R5, current-limiting resistance R3, magnetic valve SD, ternary voltage-stablizer U; Switching Power Supply 21 can be made up of transformer, commutation diode, filter capacitor etc., also can adopt the Switching Power Supply of other types;
Wherein link to each other with the live wire of civil power after the switch terminals of the first end of incoming cables connecting band potentiometer with switch R4 of Switching Power Supply, second end of incoming cables of Switching Power Supply links to each other with the zero line of civil power; First end of the first normally opened relay J1 coil links to each other with first leading-out terminal of Switching Power Supply 21, and second end of the first normally opened relay J1 coil links to each other with first end of water flow switch SL; First end of the second normally opened relay J2 coil also links to each other with first leading-out terminal of Switching Power Supply 21, and second end of the second normally opened relay J2 coil also links to each other with first end of water flow switch SL; The negative pole of the first protection diode D1 links to each other with first leading-out terminal of Switching Power Supply 21, and second leading-out terminal of Switching Power Supply 21 links to each other with second end of water flow switch SL; The positive pole of the first protection diode D1 links to each other with first end of the first protective resistance R1, and second end of the first protective resistance R1 links to each other with second end of the first normally opened relay J1 coil and second end of the second normally opened relay J2 coil; First end of magnetic valve SD links to each other with first leading-out terminal of Switching Power Supply 21, and second end of magnetic valve SD links to each other with second end of water flow switch SL; First end of current-limiting resistance R3 links to each other with first leading-out terminal of Switching Power Supply 21, second end of current-limiting resistance R3 links to each other with the input of ternary voltage-stablizer U, the output of ternary voltage-stablizer U links to each other with first end of the 3rd filter capacitor C3, and second end of the 3rd filter capacitor C3 links to each other with second end of water flow switch SL; The earth terminal of ternary voltage-stablizer U also links to each other with second end of water flow switch SL; First end of the second filter capacitor C2 links to each other with second end of current-limiting resistance R3, and second end of the second filter capacitor C2 also links to each other with second end of water flow switch SL; First end of the first heating tube LR1 links to each other with the live wire of civil power after connecting the first normally opened relay J1 contact; Second end of the first heating tube LR1 links to each other with first end of potentiometer with switch R4, second end of potentiometer with switch R4 links to each other with first end of ac capacitor C4, and second end of ac capacitor C4 is connected with the zero line of civil power after connecting the contact of the second normally opened relay J2; First end of bidirectional triode thyristor BT links to each other with second end of the first heating tube LR1, second end of bidirectional triode thyristor BT is connected with the zero line of civil power after connecting the contact of second normally opened relay, the control end of bidirectional triode thyristor BT links to each other with first end of diac D3, second end of diac D3 links to each other with first end of the 3rd protective resistance R5, and second end of the 3rd protective resistance R5 links to each other with second end of potentiometer with switch R4; The two ends of the 3rd filter capacitor C3 are connected with a thermometer T.
The operation principle of present embodiment circuit is:
Open potentiometer with switch R4, thereby make the end of incoming cables of Switching Power Supply 21 that the input of 220V voltage be arranged, the current potential that produces a positive 12V at first leading-out terminal of Switching Power Supply 21 provides power supply (if potentiometer with switch R4 closes, first leading-out terminal of Switching Power Supply 21 does not have) for subsequent conditioning circuit; After first leading-out terminal of Switching Power Supply 21 has the 12V current potential, the magnetic valve SD work of switching on, at this moment current flow through water heater, water flow switch SL connects, the coil electricity of the first normally opened relay J1, the second normally opened relay J2, the contact of the contacting of the first normally opened relay J1, the second normally opened relay J2 is also connected, and is that the energising heating of the first heating tube LR1 is ready; At this moment, accommodation zone potentiometer with switch R4 changes bidirectional triode thyristor BT both end voltage, thereby the heating power of the first heating tube LR1 is adjusted accordingly.Pass through the resistance sizes of accommodation zone potentiometer with switch R4 like this, just can be with the maximum heating power of heating power of the first heating tube LR1 from zero adjustment to the first heating tube LR1.
In this circuit, first relay J 1 and second relay J 2 are actually has controlled opening and closing of the live wire that inserts the civil power in this circuit and zero line, connect instead even insert the live wire and the zero line of civil power in this circuit, can there be security hidden trouble in water heater yet.
Embodiment two:
Different with embodiment one is, present embodiment also comprises second heater circuit 3, referring to shown in Figure 2, whether in running order second heater circuit 3 comprise the second heating tube LR2 and be connected in parallel on the indicator lamp LED that indicates the second heating tube LR2 of being used at the second heating tube LR2 two ends; Control circuit 2 also comprises the 3rd normally opened relay J3, the second protection diode D2, the second protective resistance R2, press button QK with lock, wherein first end of the 3rd normally opened relay J3 coil also links to each other with first leading-out terminal of Switching Power Supply 21, second end of the 3rd normally opened relay J3 coil connects first end of press button QK with lock, and second end of press button QK with lock links to each other with first end of water flow switch SL; The negative pole of the second protection diode D2 links to each other with first leading-out terminal of Switching Power Supply, and the positive pole of the second protection diode D2 links to each other with first end of the second protective resistance R2, and second end of the second protective resistance R2 links to each other with first end of press button QK with lock; First end of the second heating tube LR2 links to each other with first end of the first heating tube LR1, and second end of the second heating tube LR2 is connected with the zero line of civil power after connecting the contact of the 3rd normally opened relay J3.
The operation principle of present embodiment circuit is:
If the power at the first heating tube LR1 is adjusted to maximum, and water temperature is when desirable not enough, at this moment, can press press button QK with lock, make the coil two ends energising of the 3rd relay J 3, at this moment the contacting of the 3rd relay J 3, the second heating tube LR2 work of switching on, indicator lamp LED is bright.
Resistance sizes by accommodation zone potentiometer with switch R4, just can be with the maximum heating power of heating power of the first heating tube LR1 from zero adjustment to the first heating tube LR1, at this moment the power of whole heater circuit just can be from zero adjustment to the first heating tube LR1 and the maximum heating power after the second heating tube LR2 addition.
For example, the power of first heating tube is 4000W, the power of second heating tube also is 4000W, if we need 4000W with interior power adjusting, at this moment by closing press button QK with lock, make the coil two ends no power of the 3rd relay J 3, allow the second heating tube LR2 not work, as long as adjust potentiometer with switch R4, the heating power of adjusting the first heating tube LR1 can reach target.If we need 4000W～8000W scope with interior power adjusting, at this moment by opening press button QK with lock, make the contacting of the 3rd relay J 3, allow second heating tube LR2 energising work, at this moment also only need to adjust the heating power that potentiometer with switch R4 adjusts the first heating tube LR1 and just can reach target.
Embodiment three:
Different with embodiment two is, control circuit 2 also comprises an overtemperature prote switch RJ1, and referring to shown in Figure 3, this overtemperature prote switch RJ1 is connected between second end of first end of water flow switch SL and the first normally opened relay J1 coil.
In actual use; overtemperature prote switch RJ1 is installed in the delivery port place of water heater; be used to measure coolant-temperature gage; when leaving water temperature surpasses the design temperature of overtemperature prote switch RJ1; overtemperature prote switch RJ1 disconnects; make the first normally opened relay J1 coil, the second normally opened relay J2 coil, the whole dead electricity of the 3rd normally opened relay J3 coil; the first normally opened relay J1 contact, the second normally opened relay J2 contact, the 3rd normally opened relay J3 contact all disconnect, and at this moment the first heating tube LR1 and the second heating tube LR2 all do not work.
Embodiment four:
Different with embodiment three is, control circuit 2 also comprises the thermal circuit beraker RJ2 that manually resets, referring to shown in Figure 4, the main body of this hand-reset thermal circuit beraker RJ2 is installed in the delivery port place in the electric heater, and two normally-closed contacts of this hand-reset thermal circuit beraker RJ2 are serially connected between the switch control end and Switching Power Supply 21 first ends of incoming cables of potentiometer with switch R4.
When the delivery port place leaving water temperature in the electric heater is spent above 60, hand-reset thermal circuit beraker RJ2 normally-closed contact disconnects, thereby make control circuit 2 dead electricity, the first normally opened relay J1 coil, the second normally opened relay J2 coil, the whole dead electricity of the 3rd normally opened relay J3 coil, the first normally opened relay J1 contact, the second normally opened relay J2 contact, the 3rd normally opened relay J3 contact all disconnect, and at this moment the first heating tube LR1 and the second heating tube LR2 all do not work; Only after fixing a breakdown, the SR of pressing hand-reset thermal circuit beraker RJ2 just can make the first heating tube LR1 and second heating tube LR2 work.
Claims (4)
1. the heater circuit of a flowing type instantaneous electric water heater includes
At least first heater circuit (1) that comprises first heating tube (LR1);
Be used to control the control circuit (2) of the heating power of first heater circuit (1);
It is characterized in that: described control circuit (2) comprises Switching Power Supply (21), second filter capacitor (C2), the 3rd filter capacitor (C3), first normally opened relay (J1), second normally opened relay (J2), the first protection diode (D1), water flow switch (SL), bidirectional triode thyristor (BT), diac (D3), ac capacitor (C4), potentiometer with switch (R4), first protective resistance (R1), the 3rd protective resistance (R5), current-limiting resistance (R3), magnetic valve (SD), ternary voltage-stablizer (U); Wherein link to each other with the live wire of civil power after the switch terminals of the first end of incoming cables connecting band potentiometer with switch (R4) of Switching Power Supply, second end of incoming cables of Switching Power Supply links to each other with the zero line of civil power; First end of first normally opened relay (J1) coil links to each other with first leading-out terminal of Switching Power Supply (21), and second end of first normally opened relay (J1) coil links to each other with first end of water flow switch (SL); First end of second normally opened relay (J2) coil also links to each other with first leading-out terminal of Switching Power Supply (21), and second end of second normally opened relay (J2) coil also links to each other with first end of water flow switch (SL); The negative pole of the first protection diode (D1) links to each other with first leading-out terminal of Switching Power Supply (21), and second leading-out terminal of Switching Power Supply (21) links to each other with second end of water flow switch (SL); The positive pole of the first protection diode (D1) links to each other with first end of first protective resistance (R1), and second end of first protective resistance (R1) links to each other with second end of first normally opened relay (J1) coil and second end of second normally opened relay (J2) coil; First end of magnetic valve (SD) links to each other with first leading-out terminal of Switching Power Supply (21), and second end of magnetic valve (SD) links to each other with second end of water flow switch (SL); First end of current-limiting resistance (R3) links to each other with first leading-out terminal of Switching Power Supply (21), second end of current-limiting resistance (R3) links to each other with the input of ternary voltage-stablizer (U), the output of ternary voltage-stablizer (U) links to each other with first end of the 3rd filter capacitor (C3), and second end of the 3rd filter capacitor (C3) links to each other with second end of water flow switch (SL); The earth terminal of ternary voltage-stablizer (U) also links to each other with second end of water flow switch (SL); First end of second filter capacitor (C2) links to each other with second end of current-limiting resistance (R3), and second end of second filter capacitor (C2) also links to each other with second end of water flow switch (SL); First end of first heating tube (LR1) links to each other with the live wire of civil power after connecting first normally opened relay (J1) contact; Second end of first heating tube (LR1) links to each other with first end of potentiometer with switch (R4), second end of potentiometer with switch (R4) links to each other with first end of ac capacitor (C4), and second end of ac capacitor (C4) is connected with the zero line of civil power after connecting the contact of second normally opened relay (J2); First end of bidirectional triode thyristor (BT) links to each other with second end of first heating tube (LR1); second end of bidirectional triode thyristor (BT) is connected with the zero line of civil power after connecting the contact of second normally opened relay; the control end of bidirectional triode thyristor (BT) links to each other with first end of diac (D3); second end of diac (D3) links to each other with first end of the 3rd protective resistance (R5), and second end of the 3rd protective resistance (R5) links to each other with second end of potentiometer with switch (R4).
2. the heater circuit of flowing type instantaneous electric water heater according to claim 1, it is characterized in that: also comprise second heater circuit (3) that comprises second heating tube (LR2) at least, described control circuit (2) also comprises the 3rd normally opened relay (J3), the second protection diode (D2), second protective resistance (R2), press button with lock (QK), wherein first end of the 3rd normally opened relay (J3) coil also links to each other with first leading-out terminal of Switching Power Supply (21), second end of the 3rd normally opened relay (J3) coil connects first end of press button with lock (QK), and second end of press button with lock (QK) links to each other with first end of water flow switch (SL); The negative pole of the second protection diode (D2) links to each other with first leading-out terminal of Switching Power Supply (21), the positive pole of the second protection diode (D2) links to each other with first end of second protective resistance (R2), and second end of second protective resistance (R2) links to each other with first end of press button with lock (QK); First end of second heating tube (LR2) links to each other with first end of first heating tube (LR1), and second end of second heating tube (LR2) is connected with the zero line of civil power after connecting the contact of the 3rd normally opened relay (J3).
3. the heater circuit of flowing type instantaneous electric water heater according to claim 1 and 2; it is characterized in that: described control circuit (2) also comprises an overtemperature prote switch (RJ1), and this overtemperature prote switch (RJ1) is connected between second end of first end of described water flow switch (SL) and first normally opened relay (J1) coil.
4. the heater circuit of flowing type instantaneous electric water heater according to claim 1 and 2, it is characterized in that: described control circuit (2) also comprises the thermal circuit beraker (RJ2) that manually resets, the main body of this hand-reset thermal circuit beraker (RJ2) is installed in the delivery port place in the electric heater, and two normally-closed contacts of this hand-reset thermal circuit beraker (RJ2) are serially connected between first end of incoming cables of the switch terminals of potentiometer with switch (R4) and Switching Power Supply (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101556540A CN101762020B (en) | 2009-12-24 | 2009-12-24 | Heating circuit of flowing type instantaneous electric water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101556540A CN101762020B (en) | 2009-12-24 | 2009-12-24 | Heating circuit of flowing type instantaneous electric water heater |
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| Publication Number | Publication Date |
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| CN101762020A CN101762020A (en) | 2010-06-30 |
| CN101762020B true CN101762020B (en) | 2011-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009101556540A Expired - Fee Related CN101762020B (en) | 2009-12-24 | 2009-12-24 | Heating circuit of flowing type instantaneous electric water heater |
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| CN (1) | CN101762020B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103743111A (en) * | 2013-12-17 | 2014-04-23 | 青岛吉之美商用设备有限公司 | Liquid heating device with adjustable power |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102607162A (en) * | 2012-03-30 | 2012-07-25 | 陶建新 | Instant electric water heater |
| CN105905125B (en) * | 2016-05-10 | 2017-12-15 | 吉林大学 | A kind of PTC electric heater for train |
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| CN2093412U (en) * | 1991-05-21 | 1992-01-15 | 王万荣 | Fully automatic multifunctional electric water heater |
| CN2222538Y (en) * | 1995-07-11 | 1996-03-20 | 北京表带厂 | immediate heated constant-temp. irrigator |
| CN2445244Y (en) * | 2000-10-12 | 2001-08-29 | 鲍建华 | Quick intelligent electric water heater |
| CN2542993Y (en) * | 2001-12-27 | 2003-04-02 | 蔡可健 | Full-automatic controller of solar water heater |
| CN2555482Y (en) * | 2002-04-26 | 2003-06-11 | 王曦宁 | Intelligent controller of electrothermal water heater |
| CN200983098Y (en) * | 2006-06-13 | 2007-11-28 | 蔡可健 | Water heater energy-saving controlling instrument |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2093412U (en) * | 1991-05-21 | 1992-01-15 | 王万荣 | Fully automatic multifunctional electric water heater |
| CN2222538Y (en) * | 1995-07-11 | 1996-03-20 | 北京表带厂 | immediate heated constant-temp. irrigator |
| CN2445244Y (en) * | 2000-10-12 | 2001-08-29 | 鲍建华 | Quick intelligent electric water heater |
| CN2542993Y (en) * | 2001-12-27 | 2003-04-02 | 蔡可健 | Full-automatic controller of solar water heater |
| CN2555482Y (en) * | 2002-04-26 | 2003-06-11 | 王曦宁 | Intelligent controller of electrothermal water heater |
| CN200983098Y (en) * | 2006-06-13 | 2007-11-28 | 蔡可健 | Water heater energy-saving controlling instrument |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103743111A (en) * | 2013-12-17 | 2014-04-23 | 青岛吉之美商用设备有限公司 | Liquid heating device with adjustable power |
| CN103743111B (en) * | 2013-12-17 | 2017-02-08 | 青岛吉之美商用设备有限公司 | Liquid heating device with adjustable power |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101762020A (en) | 2010-06-30 |
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