CN109780732A - Anti-dry instant electric water heater - Google Patents
Anti-dry instant electric water heater Download PDFInfo
- Publication number
- CN109780732A CN109780732A CN201910054381.4A CN201910054381A CN109780732A CN 109780732 A CN109780732 A CN 109780732A CN 201910054381 A CN201910054381 A CN 201910054381A CN 109780732 A CN109780732 A CN 109780732A
- Authority
- CN
- China
- Prior art keywords
- circuit
- resistance
- water
- control
- heater
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Steam Or Hot-Water Central Heating Systems (AREA)
Abstract
A kind of anti-dry instant electric water heater.It includes water inlet flow channel and outlet passage, there is heating chamber between the water inlet flow channel and outlet passage, calandria is equipped in the heating chamber, the calandria is connect with heater circuit, it is additionally provided with resistance detecting circuit, whether the control chip connection in the resistance detecting circuit, heater circuit and governor circuit, the resistance that the test point of the resistance detecting circuit is set in the water inlet flow channel or outlet passage, and detects wherein medium are greater than preset range to judge whether there is water.The present invention judges whether there is water in runner before electric heating part electrified regulation, if there is water in runner, electric heating part is worked normally, and heats to water；If anhydrous in runner, the obstructed electric heating of electric heating part.It the presence or absence of water in runner is judged in advance, prevents electric heating part dry combustion method from burn out electric heating part, will not make in electric heater that temperature is excessively high to be damaged, effective protection electric heater.
Description
Technical field
The present invention relates to a kind of instant electric water heater, in particular to a kind of anti-dry instant electric water heater.
Background technique
Having instant electric water heater at present is kitchen appliance product, it solves family life and public place to hot water
Daily demand, make be convenient to use hot water within 24 hours 365 days in family, instant electric water heater generally comprises ontology and water
Pressure or flow control switch, ontology is interior to be equipped with heating chamber and electrical equipment control chamber, is separated with sealing plate, and intracavitary be equipped with of electrical equipment control adds
Heater circuit, is equipped with calandria in heating chamber, can heat out hot water at 1-5 seconds when use.
The burning prevention function of existing instant electric water heater is to have detected whether that water flows by water flow or hydraulic pressure switch
Enter, to control the on-off of heater circuit, realizes burning prevention function.But when cutting off the water, it can be passed through gas in runner, and gas
Body may also can trigger water flow or hydraulic pressure switch, and at this time in the absence of water, temperature control device cannot detect temperature change, just not
It can play the role of detecting temperature and power off, cause temperature control device that can not cut off, calandria will directly heat air, cause to add
Hot temperature rises rapidly, until burning.
Summary of the invention
In order to solve the problems, such as that existing instant electric water heater not can effectively prevent dry combustion method in background technique, the present invention is mentioned
Water is judged whether there is before electric heating part heating for a kind of to effectively prevent the instant electric water heater of dry combustion method.
The technical solution adopted by the present invention to solve the technical problems is: a kind of anti-dry instant electric water heater, packet
Water inlet flow channel and outlet passage are included, there is heating chamber between the water inlet flow channel and outlet passage, be equipped with and add in the heating chamber
Hot body, the calandria are connect with heater circuit, are additionally provided with resistance detecting circuit, the resistance detecting circuit, heater circuit with
Control chip connection in governor circuit, the test point of the resistance detecting circuit are set to the water inlet flow channel or outlet passage
It is interior, for detecting the resistance of medium in the water inlet flow channel or outlet passage；
When the dielectric resistance that the test point of the resistance detecting circuit detects is greater than preset range, control chip controls institute
State heater circuit no power；When dielectric resistance is less than preset range, the energization of heater circuit described in the control chip controls is simultaneously right
Water is heated.
The detection circuit is bridge detection circuit, including four bridge arms, and any bridge arm is test point detection
Resistance value, remaining bridge arm be fixed resistance.
It is additionally provided with display circuit, the display circuit is electrically connected with the control chip.
Preset range is set by the control chip.
Thermistor is equipped in governor circuit, the control chip is also connected with temperature display circuit, and the control chip is real
When read thermistor resistance value after corresponding temperature is shown on the display screen of the temperature display circuit.
Control circuit is equipped in governor circuit, the control circuit includes silicon-controlled, the silicon-controlled control electrode and control
The connection of coremaking piece.
The beneficial effects of the present invention are: the present invention judges whether there is water in runner before electric heating part electrified regulation, if stream
There is water in road, then electric heating part works normally, and heats to water；If anhydrous in runner, the obstructed electric heating of electric heating part.It is right in advance
The presence or absence of water is judged in runner, prevents electric heating part dry combustion method from burn out electric heating part, will not make instant electric water heater
Interior temperature is excessively high damages, effective protection instant electric water heater.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the embodiment of the present invention.
Fig. 2 is the circuit diagram of resistance detecting circuit of the embodiment of the present invention.
Fig. 3 is the control chip wiring schematic diagram of the embodiment of the present invention.
Fig. 4 is the circuit diagram of governor circuit of the embodiment of the present invention.
Fig. 5 is the circuit diagram of control circuit of the embodiment of the present invention.
Fig. 6 is the circuit diagram of the display circuit of the embodiment of the present invention.
Fig. 7 is the circuit diagram of the conditioned circuit of the embodiment of the present invention.
Specific embodiment
Embodiments of the present invention is further illustrated with reference to the accompanying drawing:
In the embodiment of the present invention, a kind of anti-dry instant electric water heater comprising water inlet flow channel 1 and outlet passage 2, it is described into
There is heating chamber between water flow passage 1 and outlet passage 2, calandria 3, the calandria 3 and heating electricity are equipped in the heating chamber
Road 4 connects, and is additionally provided with resistance detecting circuit 6, the control core in the resistance detecting circuit 6, heater circuit 4 and governor circuit 5
Piece connection, control chip, which can be used, common has i/o mouthfuls, programmable single-chip microcontroller, the test point of the resistance detecting circuit 6
In the water inlet flow channel 1 or outlet passage 1, when the test point of the resistance detecting circuit 6 detects the water inlet flow channel 1
Or the dielectric resistance in outlet passage 2 is when being greater than preset range, heater circuit no power described in the control chip controls；Work as inspection
When measuring point detects that the dielectric resistance in the water inlet flow channel 1 or outlet passage 2 is less than preset range, the control chip controls
Water is heated in the heater circuit energization.
The detection circuit is bridge detection circuit, including four bridge arms, and any bridge arm is test point detection
Resistance value, remaining bridge arm is fixed resistance, as shown in Figure 1, T1 point and T2 point are test point, to be examined between T1 point and T2 point
The resistance of survey, when anhydrous in runner, the resistance value between two test points is very huge, is equivalent to open circuit；When having in runner
When water, resistance value can measure specific numerical value, and can tell in runner has water state or anhydrous state.
The control chip is also connect with display circuit, digitron display screen is arranged in display circuit, in due to runner
When situations such as anhydrous causes electric heater not heat, digitron display screen can show that code prompts user.In addition in display screen
Upper display code is made outside prompt, and buzzing is such as arranged for issuing signal prompt user in also settable circuit for alarming in circuit
Device, when anhydrous in runner, buzzer makes a sound prompt user and can not heat；Or setting warning light makes user and warns.
Preset range is set by the control chip, and the cross-sectional area of runner will affect the electricity of water between test point T1 and T2
The water quality difference of resistance, south and the water source of northern different geographical is also very big, in order to more accurately realize the size of detection water resistance
Value compares, can be by a reference value in setting control chip, using a reference value as the central value of preset range.Similar, water temperature
It sets consistent with the setting principle of the preset range.The setting of resistance value can be carried out according to demand, or is carried out according to demand
The selection of multiple modes, or directly fix preset range, it is non-adjustable.
In governor circuit be equipped with thermistor, thermistor use negative temperature coefficient thermistor, display circuit it
Outer increase temperature display circuit, or directly by display circuit as temperature display function, such as by display circuit displays temperature when, institute
It states control chip and reads in real time and drive digital tube is shown into corresponding temperature after the resistance value of thermistor.
Control circuit is equipped in governor circuit, the control circuit is using silicon-controlled as switch, the silicon-controlled control
Pole processed is connect with control chip, silicon-controlled to have the advantages that be quick on the draw, control powerful, silicon-controlled control with small-power
Pole receives the control signal of control chip, when resistance detecting circuit 6 detect in runner have water or it is anhydrous when, can make rapidly anti-
It answers, the on-off of control circuit.
Meanwhile passing through the function of the silicon-controlled achievable automatic temperature-control.Silicon-controlled control electrode and control chip output
Foot connection controls chip and according to thermistor resistance value judges current water temperature and compared with set water temperature, then to silicon-controlled sending
Corresponding high level or low level are to control its on-off, so that the on-off of control circuit realizes the adjust automatically of temperature.
Relay can also be used in control circuit as switch, temperature control is realized by relay.Control chip root
Current water temperature is judged according to thermistor resistance value and compared with set water temperature, issue corresponding level signal control relay coil
Switching electricity disconnects relay contact, makes circuitry cuts after temperature reaches set water temperature.
Silicon-controlled to use in control circuit simultaneously with relay, when silicon-controlled be out of order, relay is to circuit
It plays a protective role.
Every technical staff's notice: of the invention although the present invention is described according to above-mentioned specific embodiment
Invention thought be not limited in the invention, any repacking with inventive concept will all be included in this patent protection of the patent right
In range.
Claims (6)
1. a kind of anti-dry instant electric water heater comprising water inlet flow channel (1) and outlet passage (2), the water inlet flow channel (1)
There is heating chamber between outlet passage (2), be equipped with calandria (3), the calandria (3) and heater circuit in the heating chamber
Connection, it is characterised in that: be additionally provided with resistance detecting circuit, the control in the resistance detecting circuit, heater circuit and governor circuit
The test point of the connection of coremaking piece, the resistance detecting circuit is set in the water inlet flow channel or outlet passage, described for detecting
The resistance of medium in water inlet flow channel or outlet passage；
When the dielectric resistance that the test point of the resistance detecting circuit detects is greater than preset range, control chip controls institute
State heater circuit no power；When dielectric resistance is less than preset range, the energization of heater circuit described in the control chip controls is simultaneously right
Water is heated.
2. a kind of anti-dry instant electric water heater according to claim 1, it is characterised in that: the detection circuit is bridge
Formula detection circuit, including four bridge arms, any bridge arm are the resistance value of test point detection, remaining bridge arm is fixed electricity
Resistance.
3. a kind of anti-dry instant electric water heater according to claim 1, it is characterised in that: it is additionally provided with display circuit,
The display circuit is electrically connected with the control chip.
4. a kind of anti-dry instant electric water heater according to claim 1, it is characterised in that: preset range is by the control
The setting of coremaking piece.
5. a kind of anti-dry instant electric water heater according to claim 1, it is characterised in that: be equipped with heat in governor circuit
Quick resistance, the control chip are connect with temperature display circuit, and the control chip will after reading the resistance value of thermistor in real time
Corresponding temperature is shown on the display screen of the temperature display circuit.
6. a kind of anti-dry instant electric water heater according to claim 1, it is characterised in that: be equipped with control in governor circuit
Circuit processed, the control circuit include it is silicon-controlled, the silicon-controlled control electrode with control chip connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910054381.4A CN109780732A (en) | 2019-01-21 | 2019-01-21 | Anti-dry instant electric water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910054381.4A CN109780732A (en) | 2019-01-21 | 2019-01-21 | Anti-dry instant electric water heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109780732A true CN109780732A (en) | 2019-05-21 |
Family
ID=66501784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910054381.4A Pending CN109780732A (en) | 2019-01-21 | 2019-01-21 | Anti-dry instant electric water heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109780732A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000039212A (en) * | 1998-07-24 | 2000-02-08 | Paloma Ind Ltd | Hot water supply apparatus with heat insulation function |
| CN2408396Y (en) * | 1999-12-29 | 2000-11-29 | 朱殿臣 | Electric water heater |
| CN202581759U (en) * | 2012-03-14 | 2012-12-05 | 中山市汉功电器有限公司 | Instantaneous electric heating device |
| CN103900248A (en) * | 2012-12-25 | 2014-07-02 | 福州斯狄渢电热水器有限公司 | Instant water heater |
| TW201516355A (en) * | 2013-10-18 | 2015-05-01 | Grand Mate Co Ltd | Water heater and dry-boiling prevention device and method for the water heater |
| CN105406443A (en) * | 2015-11-11 | 2016-03-16 | 无锡联力电子科技股份有限公司 | Instantaneous electric water heater dry heating prevention detection protection circuit |
| CN209623118U (en) * | 2019-01-21 | 2019-11-12 | 浙江传福电器有限公司 | Anti-dry instant electric water heater |
-
2019
- 2019-01-21 CN CN201910054381.4A patent/CN109780732A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000039212A (en) * | 1998-07-24 | 2000-02-08 | Paloma Ind Ltd | Hot water supply apparatus with heat insulation function |
| CN2408396Y (en) * | 1999-12-29 | 2000-11-29 | 朱殿臣 | Electric water heater |
| CN202581759U (en) * | 2012-03-14 | 2012-12-05 | 中山市汉功电器有限公司 | Instantaneous electric heating device |
| CN103900248A (en) * | 2012-12-25 | 2014-07-02 | 福州斯狄渢电热水器有限公司 | Instant water heater |
| TW201516355A (en) * | 2013-10-18 | 2015-05-01 | Grand Mate Co Ltd | Water heater and dry-boiling prevention device and method for the water heater |
| CN105406443A (en) * | 2015-11-11 | 2016-03-16 | 无锡联力电子科技股份有限公司 | Instantaneous electric water heater dry heating prevention detection protection circuit |
| CN209623118U (en) * | 2019-01-21 | 2019-11-12 | 浙江传福电器有限公司 | Anti-dry instant electric water heater |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104783654A (en) | Intelligent heat preservation electric kettle | |
| CN209623118U (en) | Anti-dry instant electric water heater | |
| WO2017036378A1 (en) | Intelligent heating rod and aquarium | |
| US6646237B2 (en) | Safety control circuit for electric water heater | |
| ATE325985T1 (en) | SYSTEM AND METHOD FOR MONITORING AN ELECTRIC STOVE | |
| CN109780732A (en) | Anti-dry instant electric water heater | |
| CN207279793U (en) | A kind of wind heater device with overtemperature protection | |
| GB2394607A (en) | Aquarium heater | |
| CN105548868A (en) | Performance test device and method for temperature switch | |
| CN201811352U (en) | Wall-mounted furnace controller | |
| CN207638204U (en) | A kind of novel constant-temperature electric cabinet | |
| CN109541447B (en) | Temperature relay detection equipment and method | |
| CN105030056A (en) | Thermal-insulation control electric kettle based on singlechip microcomputer | |
| CA1199817A (en) | Method and device for the testing of temperature control valves in the water cooling system of locomotive engines | |
| CN205510426U (en) | Safe novel electric heat is precious | |
| CN112460808B (en) | Control method of heating device, heating device and intelligent closestool | |
| CN202421106U (en) | Furniture heat testing device | |
| CN210241981U (en) | Electric heating device for gas | |
| CN110191542B (en) | Temperature protector of LED lamp and mounting process thereof | |
| CN201001630Y (en) | Full-intelligent electric water kettle | |
| WO2016078535A1 (en) | Power supply control apparatus capable of detecting external leakage voltage | |
| CN212498256U (en) | Building tubular pile switch board monitored control system | |
| CN205208711U (en) | Small -size domestic safe intelligent environmental protection heating system | |
| CN112460807A (en) | Control method of heating device, heating device and intelligent closestool | |
| CN208519853U (en) | The integrated security system of a kind of wall-hung boiler, floor heating |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |