CN2377480Y - Electric constant-temp. water heater - Google Patents
Electric constant-temp. water heater Download PDFInfo
- Publication number
- CN2377480Y CN2377480Y CN 99209494 CN99209494U CN2377480Y CN 2377480 Y CN2377480 Y CN 2377480Y CN 99209494 CN99209494 CN 99209494 CN 99209494 U CN99209494 U CN 99209494U CN 2377480 Y CN2377480 Y CN 2377480Y
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- Prior art keywords
- circuit
- voltage
- temperature
- water
- coil pipe
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Abstract
The utility model discloses an electric water heater which enables water in a coil pipe can be used once heated up by adopting an electric heating element to heat the coil pipe. The inside of a circuit device is mainly provided with a temperature measuring bridge, an operational amplifier, a comparison circuit, an output voltage control circuit, an electric voltage negative feedback circuit, a display circuit, a power circuit, a dan electric leakage control circuit; the voltage negative feedback circuit which is arranged in the circuit device is utilized to control water to heated to quickly automatically an output voltage on an operating load RL within the set temperature range to realize the quick water supply at a constant temperature. The utility model has the advantages of small size, simple structure, high safety, and low cost can be used for water supply facilities of families, office buildings, and commercial buildings.
Description
The utility model relates to fluid heater, the heater that specifically utilizes heating to heat for circulating water in the water flowing coil pipe.
Electric heater is used very extensive, except that safety factor, the design and the adjusting problem of a water yield and water temperature is arranged all.Needing to add cold water after hot water is emitted in the storage-type water tank and do the water temperature adjusting with hot and cold water tap, could use, no matter be that machinery is regulated or manual adjustments automatically, all is the thing of trouble like this.The circulating water heater of another kind of instant-heating-type constant-temperature control because will be subjected to influence of various factors such as flow velocity, heating power, original water temperature, adopts microcomputer control, thus complex structure, and cost is higher.
The purpose of this utility model is to propose a kind of electric heating constant temperature water heater improved, simple in structure.It can remove artificial various complicated the adjusting and puzzlement from, needs only set water temperature in use, just can be controlled the operating voltage of electrical heating elements by circuit arrangement automatically, obtains the supply of constant-temperature hot water, and instant heating is promptly used.
The utility model based on:
1, adopts the heating wire heating of enough power;
2, utilize the water flowing coil pipe that surrounds the heating setting fully to absorb heat;
3, the application of voltage negative feedback automatic control circuit in electrical heating.
The electric heating constant temperature water heater that technical solutions of the utility model provide, mainly comprise housing, coil pipe, heating, the circuit arrangement that flow switch and thermostatic control are used, the coil pipe that is used for water flowing is located in the chamber of housing, the pipe dish surrounds heating, the water inlet of pipe dish termination, delivery port is located at the housing outer wall, said circuit arrangement comprises that one is used to pick up the bridge for measuring temperature of surveying water temperature, with the circuit of set water temperature temperature, and an operational amplifier that is used for the deviation voltage amplification of thermometric voltage signal and design temperature signal, an output voltage controlling circuit is characterized in that said coil pipe is the double-deck coil pipe that is provided with of spirality; Also be provided with in the said circuit arrangement one from operating load-heating-voltage negative feedback circuit, with a comparison circuit, feedback circuit is made up of coupling transformer, rectifier bridge heap, divider resistance and load resistance, its load resistance is connected on the resistance of bleeder circuit of operational amplifier output terminal and the signal input part of SCR control circuit, the signal voltage of feedback signal and amplifier output is made comparisons, be used to control the silicon controlled angle of flow, and then control is added in the output voltage on the operating load.
Also be provided with a temperature digital display circuit device in the circuit arrangement of electric heating constant temperature water heater.
Also be provided with a leakage protection circuit device in the circuit arrangement of electric heating constant temperature water heater.Mainly form by transformer, Qiao Dui, resistance, electric capacity, triode and relay, fly-wheel diode, opposite, the symmetrical input coil of two phase places of transformer is connected in series with input coil two ends of power transformer respectively, its secondary coil is connected into rectification, amplifying circuit, the base stage work of back level is controlled by prime, and relay is connected in the collector access of back level.
Said SCR control circuit also is provided with a frequency synchronisation circuit, mainly is made up of triode and its power circuit, and its collector voltage and base signal voltage separately independently provide, and base terminal is not provided with filter capacitor.
Main effect of the present utility model is:
1, the coil pipe that is adopted has bigger heat exchange area, and heat can fully be absorbed by the water in the pipe;
2, the control of the negative-feedback by circuit, the water inlet that can make different discharges and different water temperatures is in seconds
Obtain heating and regulate and emit continuously;
3, structure is small and exquisite, is convenient to install, and supplies water with advancing with going out, and instant heating i.e. usefulness, and is easy to use;
4, add flow switch, need not dial down attaching plug after the use;
5, good insulation is set, can guarantees safety;
6, can add earth leakage protective and overtemperature alarm, realize automatic power-off protection, further improve security
And reliability.
Below in conjunction with embodiment and description of drawings it:
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is that coil arrangement row establishes mode figure.
Fig. 3 is a kind of set-up mode of heating.
Fig. 4 is the block diagram of circuit arrangement.
Fig. 5 is the circuit theory diagrams of embodiment.
Referring to accompanying drawing.Embodiment middle shell 1 shown in Figure 1 forms the shell chamber, dish is established the coil pipe of spiral series connection on the inside and outside wall of the shell frame 2 of a composite plate frame, outer coil pipe 3, inner coil pipe 8 and shell frame wall exposure to welding fixed, an one port connects the water inlet 15 that flow switch 4 is installed to the housing, and another port jointing temp sensor 9 is connected to delivery port 10 again.Heating assembly 6 is set in the Compound Cavity of shell frame 2, panel is provided with display window 5, bottom is respectively arranged with power switch 11 (K1), selector switch 12 (K2), making temperature sets and the selected usefulness of picking up survey, relay indicating light 13 (LED), or establish flow switch indicator lamp 14, the bright indication flow switch of lamp is positioned at open mode.
Fig. 2 is the assembly apparatus that the shell frame of Fig. 1 example combines with coil pipe, and in the time of in circuit arrangement is located at the chamber, water inlet is introduced into the coil pipe of internal layer and draws from outer field coil pipe, can make circuit arrangement be in lower environment temperature.In the interlayer of shell frame 2 heating is set.This structure with coil pipe encirclement heating also can adopt other style.It is tortuous for example to adopt spiral water flowing coil pipe to be undertaken by plane or space, in the middle of tortuous tunnel heating is set, and its effect is suitable.
Fig. 3 stresses a kind of structure and set-up mode of heating.It installs following two heating wire groups between the interlayer of shell frame 2, heating wire 18 is fastened on mica sheet skeleton 19, and both sides are in addition with mica-sheet insulation and spacing fixing.The 20th, heating wire draws joint.Interconnect outside the back and draw.
In the theory diagram shown in Figure 4, at first obtain real-time sampling, convert voltage difference to through bridge for measuring temperature and be passed to display and carry out numeral and show by temperature sensor.Make the displays temperature value consistent before the work, corresponding voltage difference V with the temperature value of actual samples point
1, also can adopt consistent with room temperature (indignant relatively thought).Design temperature is the heating water temperature of predetermined target value, corresponding voltage difference V
2The voltage pressure reduction that the switch bit of design temperature and bridge for measuring temperature is 1,2 is V
3V
3After amplifying and from electric heating element both ends coupled signal voltage, compare by a comparison circuit, by comparative result the base current of output voltage controlling circuit input G1 is boosted immediately or the automatic control of step-down, control output voltage by the control thyristor operating angle, make heating work.If electric leakage is arranged, introduce leakage control circuit as the heating place of AC load, amplify the work of pusher motor type relay by uneven electricity consumption sampled signal and disconnect the external power path by power input.In addition, flow switch or add that transfiniting outage control of heat protection is added in the biasing path of leakage control circuit simultaneously.
The course of work of this device is summarized as follows:
1, turn on the power switch K1, transformer B1 work, the charactron of display is lighted the demonstration sensing
Temperature value (water temperature or room temperature) is surveyed in picking up of element reflection;
2, put selector switch in " setting " position, it is a certain setting heating water temperature that adjusting W1 makes show value
The degree value promptly is expressed as 50 ℃ as " 50.0 ", finishes, and selector switch turns back " picking up survey " position;
3, open water on the water valve, flow switch K3 closure, the base bias path of G6 is connected and is worked,
The relay J energising, normally opened contact J
1-1By adhesive, load and external power are connected.If produce
Electric leakage, then the FG end has induced-current output, the G5 conducting, G6 ends, and relay discharges,
Disconnect J
1-1Make the external power open circuit.If overheated then heat portective switch Kr disconnects, G6 ends,
Can realize protection equally.
4, start working moment, output voltage is zero, feedback voltage V
4Also be zero; Water temperature is low, presses
Difference V
3Very big, V
3-V
4〉=0, the output current of G1 is very big, and bidirectional triode thyristor D19 leads
Current flow angle is minimum, and output voltage carries out Fast Heating near 220 volts to heating RL,
Water temperature rises rapidly; V when rising near design temperature
3≈ V
4, V
3-V
4≈ 0, the output of G1
Electric current reduces, and water temperature rises and slows down; When further approaching design temperature, V
4It is faster to descend,
V
3-V
4＞0, this moment, the output current of G1 began again to increase, and output voltage increases thereupon, as
This makes water temperature constant in the position near 50 ℃ gradually.Above process is in the time in several seconds
Automatically adjust, realize adding the automatic constant-temperature control of hot water.It is only relevant with sensing temperature,
And have nothing to do with initial water temperature, the water yield.
5, shutdown.Close into water water valve, flow switch K3 disconnects, and G6 ends, and relay discharges,
Contact J
1-1Disconnect and cut off external power.
In the embodiment circuit that Fig. 5 provides, the left side is the bridge for measuring temperature circuit, is display circuit above.Bridge circuit is made up of R1, R2, R3, R4, Rt, and R2, R3, R4, Rt respectively are brachium pontis, and Rt is a thermistor, as TEMP.Operating voltage is piled D by bridge
1-4Rectification and three terminal regulator DW1 obtain+and 5 volts of ends provide.R1 is a divider resistance, and potentiometer W2 uses for zeroing.Input 30 pin, 31 pin of electric bridge output termination display IC3 (L7107), the pressure reduction that is reflected is V
BA, i.e. V
TWhen sensing temperature was room temperature, it was the room temperature number of degrees that regulator potentiometer W2 makes the display displays temperature.V
BABe proportional to sensing temperature numerical value, linear value (full scale) V in 0-50 ℃ of scope
BA≤ 800mV can directly show so need not amplify.Display circuit is digital thermometer circuit (L7107) commonly used.
Design temperature.K2 connects the C point among the figure, then B, the C voltage difference V of ordering
BCBe that display shows, regulate W1, obtain the voltage change of dividing point B from divider resistance R6, corresponding according to this temperature displayed value is the design temperature of target water temperature.As shown in the figure, what K2 two opposite sides position was reflected is 2 situations of A, C, and its pressure reduction is V
ACIf V
AC=0 volt, because of V
BA≠ 0, equate with design temperature when corresponding to actual probe temperature.Generally speaking, T
Water＜T
If, then corresponding V
AC＞0 volt; Or T
Water＞T
If, should corresponding V
AC＜0 volt.This voltage difference provides convenience for later process control.
The pressure reduction amplifying circuit.Be used for V
ACWhat pressure reduction amplified is the differential amplifier circuit that is made of operational amplifier IC1, IC2 and peripheral cell thereof.Circuit has high input impedance, with the high internal resistance voltage source coupling of importing previously.Step-down is on load resistance R16 behind output voltage process dropping resistor R11 of this amplifying circuit and the potentiometer W4.T generally speaking
Water＜T
If, two ends of R16 are last negative just down.
Voltage negative feedback circuit.It is by transformer B2, bridge heap D
5-8, divider resistance R15, potentiometer W5 and form as the R17 of load resistance, the primary current coil of 2 transformer B is in parallel with the RL heating.Obviously the direct current pressure drop on the R17 directly and the voltage positive correlation on the RL.
Voltage comparator circuit.Voltage comparator circuit is made up of G1, R37, R16, R17, C2, R18, R19, and the base stage input voltage of G1 is determined by the algebraical sum of the voltage on R37, R16, the R17.Voltage V on the R37
5Polarity is constant, and pressure drop is about 0.7 volt, is used to overcome base voltage less than 0.7 volt dead band.V on the R16
3, the voltage V on the R17
4All change, by the collector current I of its comparative result triode G1
1CEControl.Work as V
3-V
4＜0 o'clock, I
1CE↑; Work as V
3-V
4＞0 o'clock, I
1CE↓.
Output voltage controlling circuit.Mainly be made up of G1, G2, G3, G4, B3, operating voltage is taken from the secondary coil L4 of power transformer B1, D
13-16Constitute the bridge heap, wherein G3 is a unijunction transistor, and DW4 is a voltage-stabiliser tube, and C4 is a filter capacitor.During the G1 conducting capacitor C 3 is charged, the speed of charging directly influences the ON time of unijunction transistor, and C3 powers on when pressing the Peak Operating Voltage that rises to greater than unijunction transistor G3, the unijunction transistor conducting, this moment, C3 discharged by R20, make the G4 conducting simultaneously, when the voltage on the C3 drop to the lowest point voltage of G3 when following G3 end, C3 no longer discharges, G4 ends rapidly, on the secondary coil of transformer B3, produce the response pulse crest at that time, trigger bidirectional triode thyristor D19 conducting work, by V
3-V
4The angle of flow size of decision D19, and then control is added in the height that heating RL goes up output voltage.
For more accurate control to the C3 charging interval, be provided with one and form by G2, DW3, R22, R23, R24, the collector voltage of G2 is provided by DW4, its base signal is taken from the secondary L3 of power transformer, through D
9-12Rectification, the DW3 voltage stabilizing is not provided with filter capacitor in the hope of synchronous with supply frequency.
Graphic display unit also is provided with a leakage protection circuit, and it is mainly by transformer B4, bridge heap D
21-24, resistance R 39, R40, capacitor C 15, triode G5, G6 and relay J, sustained diode 18 form.Wherein the relay load of G6 is connected in the D of bridge heap
1-4Output, just be in wait state after introducing working power, if its biasing circuit is connected G6 conducting work immediately.Put G5 this moment again and connect the electricity wait.The primary coil of B4 is the coil of two phase place symmetries, in case electric leakage occurs, with disequilibrium, the induced signal electric current appears in moment in the secondary coil, and the base stage of introducing G5 through rectification makes its conducting, and then G6 ends, and relay discharges, and disconnects external power and is protected.In addition, the contact of a heat portective switch Kr and a flow switch K3 plays the effect of safeguard protection equally on connecting in the biasing path of G6.Heat portective switch Kr and flow switch K3 also can be located in the path of K1 switch, as long as can control the break-make of external power, effect is identical.
Setting value is 50 ℃: (operating voltage when corresponding water temperature 49.78 is spent on the RL is 180～185V)
Water temperature temperature difference V3, (volt) V4, (volt) V3-V4 output services voltage water temperature change 1 room temperature 20-30 very greatly 0 〉=0 220V, 2 49.5 0.5 1.5 1＞0 220V, 3 49.67 0.33 1 1=0＜220V microlitre, 4 50 00 0.7＜0 180V that heats up that is rapidly heated edge down.
Claims (4)
1, a kind of electric heating constant temperature water heater, mainly comprise housing (1), coil pipe (3 and 8), heating (18), the circuit arrangement (7) that flow switch (4) and thermostatic control are used, the coil pipe that is used for water flowing is located in the chamber of housing, the pipe dish surrounds heating, the water inlet (15) of pipe dish termination, delivery port (10) is located at the housing outer wall, said circuit arrangement comprises that one is used to pick up the bridge for measuring temperature of surveying water temperature, with the circuit of set water temperature temperature, and an operational amplifier that is used for the deviation voltage amplification of thermometric voltage signal and design temperature signal, an output voltage controlling circuit is characterized in that said coil pipe is the coil pipe (3 and 8) that spirality is provided with; Also be provided with a voltage negative feedback circuit and the comparison circuit from operating load (RL) in the said circuit arrangement, feedback circuit is by coupling transformer (B2), rectifier bridge heap (D
5-8), divider resistance (R15, W5, R17) and load resistance (R17) form, its load resistance (R17) is connected on the resistance (R16) of the bleeder circuit of operational amplifier output terminal and the signal input part (X) of SCR control circuit, the signal voltage of feedback signal and amplifier output is made comparisons, be used to control the angle of flow of controllable silicon (D19), and then control is added in the output voltage on the operating load (RL).
2, electric heating constant temperature water heater as claimed in claim 1 is characterized in that also being provided with in the described circuit arrangement temperature digital display circuit device (IC3L7107).
3, electric heating constant temperature water heater as claimed in claim 1 is characterized in that also being provided with in the described circuit arrangement leakage protection circuit device, mainly by transformer (B4), and bridge heap (D
21-24), resistance (R39, R40), electric capacity (C15), triode (G5, G6) and relay (J), fly-wheel diode (D18) is formed, and opposite, the symmetrical input coil of two phase places of transformer is connected in series with input coil two ends of power transformer (B1) respectively, and its secondary coil is connected into rectification, amplifying circuit, the base stage work of back level (G6) is subjected to prime (G5) control, and relay is connected in the collector access of back level (G6).
4, electric heating constant temperature water heater as claimed in claim 1, it is characterized in that said SCR control circuit also is provided with a frequency synchronisation circuit, mainly form by triode (G2) with its power circuit, its collector voltage and base signal voltage separately independently provide, and base terminal is not provided with filter capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99209494 CN2377480Y (en) | 1999-04-28 | 1999-04-28 | Electric constant-temp. water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99209494 CN2377480Y (en) | 1999-04-28 | 1999-04-28 | Electric constant-temp. water heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2377480Y true CN2377480Y (en) | 2000-05-10 |
Family
ID=34002982
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99209494 Expired - Fee Related CN2377480Y (en) | 1999-04-28 | 1999-04-28 | Electric constant-temp. water heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2377480Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103052847A (en) * | 2010-07-22 | 2013-04-17 | 皇家飞利浦电子股份有限公司 | Prevention or reduction of scaling on a heater element of a water heater |
| CN103307757A (en) * | 2013-06-05 | 2013-09-18 | 苏州惠瑞自动化集成有限公司 | Automatic constant-temperature water heating device |
| CN103743114A (en) * | 2013-12-27 | 2014-04-23 | 柳州职业技术学院 | Water temperature automatic control circuit for temperature constant water heater |
| CN107367069A (en) * | 2017-06-30 | 2017-11-21 | 邹彦双 | A kind of air-source water heater voltage regulating and controlling circuit |
-
1999
- 1999-04-28 CN CN 99209494 patent/CN2377480Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103052847A (en) * | 2010-07-22 | 2013-04-17 | 皇家飞利浦电子股份有限公司 | Prevention or reduction of scaling on a heater element of a water heater |
| CN103052847B (en) * | 2010-07-22 | 2015-06-10 | 皇家飞利浦电子股份有限公司 | Prevention or reduction of scaling on a heater element of a water heater |
| CN103307757A (en) * | 2013-06-05 | 2013-09-18 | 苏州惠瑞自动化集成有限公司 | Automatic constant-temperature water heating device |
| CN103743114A (en) * | 2013-12-27 | 2014-04-23 | 柳州职业技术学院 | Water temperature automatic control circuit for temperature constant water heater |
| CN107367069A (en) * | 2017-06-30 | 2017-11-21 | 邹彦双 | A kind of air-source water heater voltage regulating and controlling circuit |
| CN107367069B (en) * | 2017-06-30 | 2018-06-26 | 佛山市顺德区约利节能设备有限公司 | A kind of air-source water heater voltage regulating and controlling circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |