CN205248769U - Instant heating electric water heater prevents that dry combustion method detects protection circuit - Google Patents
Instant heating electric water heater prevents that dry combustion method detects protection circuit Download PDFInfo
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- CN205248769U CN205248769U CN201520904815.2U CN201520904815U CN205248769U CN 205248769 U CN205248769 U CN 205248769U CN 201520904815 U CN201520904815 U CN 201520904815U CN 205248769 U CN205248769 U CN 205248769U
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 115
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 238000009841 combustion method Methods 0.000 title abstract description 13
- 230000005611 electricity Effects 0.000 claims abstract description 39
- 238000001514 detection method Methods 0.000 claims abstract description 14
- 230000002265 prevention Effects 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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Abstract
The utility model discloses an instant heating electric water heater prevents that dry combustion method detects protection circuit belongs to high -power instant heating electric water heater field, including detecting control circuit, heating control circuit, main control chip and 12V power module, detecting control circuit and including three -phase bridge circuit, preventing dry combustion method detection circuitry, preventing dry combustion method protection circuit and three -phase AC contactor, the purpose is to instant heating electric water heater's three -phase electricity (380V) and single phase power heating system, provide and prevent that the dry combustion method detects and control circuit, and when the dry combustion method phenomenon takes place, the utility model discloses can the instantaneous trip three -phase electricity general supply, the emergence of effectual prevention dry combustion method phenomenon, guarantee high -power instant heating electric water heater in the course of the work the security and prolonged high -power instant heating electric water heater's life.
Description
Technical field
The utility model belongs to high-power instant-heating electric water heater field.
Background technology
High-power instant-heating electric water heater is very fragile in face of dry combustion method, generally under dry-fire condition, in several minutes, will be damagedBad, there is serious quality accident. The main manifestations of heating wire water heater is booster and fracture of wire. Therefore dry combustion method be high-powerThe main reason of heating electric water heater generation quality problems. In the quality problems that occur at all high-power instant-heating electric water heaters,Having over half is because dry combustion method is caused, and the quality problems that caused by dry combustion method are not generally minor issues, and it is directAttack be the heart (heating element) of high-power instant-heating electric water heater, once therefore because of dry combustion method cause one high-power be thermoelectricityWater heater generation quality problems, so this high-power instant-heating electric water heater whole subscription rate at last just substantially. Therefore say dryBurning is the No.1 natural enemy of high-power instant-heating electric water heater, has a strong impact on quality and the service life of high-power instant-heating electric water heater.
Utility model content
The purpose of this utility model is three-phase electricity (380V) and the single-phase electricity heating system for instant-heating electric water heater, provides anti-dryBurn and detect and control circuit.
For achieving the above object, the utility model adopts following technical scheme: instant-heating electric water heater anti-dry detects holding circuit,It is characterized in that: comprise and detect control circuit, heating control circuit, main control chip, power module, electrical heating wire, described inDetect control circuit and comprise bridge circuit, anti-dry testing circuit, anti-dry holding circuit and three-phase ac contactor, described inAnti-dry testing circuit comprises current-limiting resistance and photoelectrical coupler, and described photoelectrical coupler is by current-limiting resistance and described bridge-type electricityThe output on road connects, and the output of described photoelectrical coupler is connected with the detection input of described main control chip; Described anti-dryBurn holding circuit and comprise thermal circuit beraker, relay and control triode, the input of described thermal circuit beraker connects power module,The output of thermal circuit beraker connects the coil input end of described relay, the coil output connection control triode of relayColelctor electrode, controls the grounded emitter of triode, controls the base stage of triode and the anti-dry control of described main control chip outputEnd connects; The output of described bridge circuit is also connected with the coil control input end of three-phase ac contactor, and three-phase alternating current connectsThe coil control output end of tentaculum is connected with the common of relay, the normally-closed contact of described relay and bridge circuit defeatedGo out end and connect, described electrical heating wire is three-phase electricity heater strip or single-phase electricity heater strip.
Described heating control circuit comprises A phase electrical heating wire control circuit, B phase electrical heating wire control circuit and the electrical heating of C phaseSilk control circuit, the input of described A phase electrical heating wire control circuit and the A phase output terminal of described three-phase ac contactor touchPoint connection, the input of described B phase electrical heating wire control circuit and the B phase output terminal contact of described three-phase ac contactor connectConnect, the input of described C phase electrical heating wire control circuit and the C phase output terminal contact of described three-phase ac contactor be connected,The control end of described A phase electrical heating wire control circuit, the control end of B phase electrical heating wire control circuit, the control of C phase electrical heating wireThe control end of circuit is all connected with the heating wire control output end of described main control chip, the detection of A phase electrical heating wire control circuitThe detection output of output, B phase electrical heating wire control circuit, the detection output of C phase electrical heating wire control circuit are all and instituteThe input of stating bridge circuit connects.
Described power module is 12V power module.
Described electrical heating wire is three-phase electricity heater strip, and the A phase input of described three-phase electricity heater strip connects the electrical heating of described A phaseThe output of silk control circuit, the B phase input of three-phase electricity heater strip connects the output of described B phase electrical heating wire control circuitEnd, the C phase input of three-phase electricity heater strip connects the output of described C phase electrical heating wire control circuit.
Described electrical heating wire is single-phase electricity heater strip, and the live wire input of described single-phase electricity heater strip connects the electrical heating of described A phaseThe output of silk control circuit, the zero line input of described single-phase electricity heater strip connects described B phase electrical heating wire control circuitOutput.
It is a kind of three of instant-heating electric water heater that is applicable to that instant-heating electric water heater anti-dry described in the utility model detects holding circuitThe anti-dry of electricity (380V) and single-phase electricity heating system detects holding circuit mutually, in the time having dry combustion method phenomenon to occur, and the utility modelAdopt multiple protective circuit, i.e. three-phase ac contactor protection, thermal circuit beraker protection and the anti-dry of anti-dry holding circuit are protectedThe control end protection of protection circuit, can instantaneous trip three-phase electricity general supply, and the generation of effectively pre-anti-dry phenomenon, ensures largeSecurity in the course of the work of power instant-heating electric water heater and extended service life of high-power instant-heating electric water heater.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of the utility model embodiment 1;
Fig. 2 is the circuit theory diagrams of the utility model embodiment 2.
Detailed description of the invention
Embodiment 1:
Instant-heating electric water heater anti-dry as shown in Figure 1 detects holding circuit, comprise detect control circuit, heating control circuit,Main control chip, power module and electrical heating wire, described power module is 12V power module (power module is not shown).Described detection control circuit comprises bridge circuit, anti-dry testing circuit, anti-dry holding circuit and three-phase ac contactorCN13, described anti-dry testing circuit comprises current-limiting resistance R89 and photoelectrical coupler IC7, described photoelectrical coupler IC7 is by limitLeakage resistance R89 is connected with the output of described bridge circuit, the output of described photoelectrical coupler IC7 and described main control chip MCUDetection input connect; Described anti-dry holding circuit comprises thermal circuit beraker CN14, relay K 1 and control triode N2,The input of described thermal circuit beraker CN14 connects described power module, relay K 1 described in the output termination of described thermal circuit beraker CN14Coil input end, the coil output of described relay K 1 connects the colelctor electrode that controls triode N2, controls the transmitting of triode N2Utmost point ground connection, the base stage that controls triode N2 is connected with the anti-dry control output of described main control chip MCU; Described bridge circuitOutput be also connected with the coil control input end of described three-phase ac contactor CN13, described three-phase ac contactor CN13Coil control output end be connected with the common of described relay K 1, the normally-closed contact of described relay K 1 and described bridge-typeThe output of circuit connects.
Described heating control circuit comprises A phase electrical heating wire control circuit, B phase electrical heating wire control circuit and the electrical heating of C phaseSilk control circuit, the input of described A phase electrical heating wire control circuit is exported mutually with the A of described three-phase ac contactor CN13Terminal contacts connects, the input of described B phase electrical heating wire control circuit is exported mutually with the B of described three-phase ac contactor CN13Terminal contacts connects, the input of described C phase electrical heating wire control circuit is exported mutually with the C of described three-phase ac contactor CN13Terminal contacts connects, the control end of described A phase electrical heating wire control circuit, control end, the C phase of B phase electrical heating wire control circuitThe control end of electrical heating wire control circuit is connected with the heating wire control output end of described main control chip MCU respectively, and A is electricity mutuallyThe detection output of heating strip control circuit, the detection output of B phase electrical heating wire control circuit, C phase electrical heating wire control electricityThe detection output on road is all connected with the input of described bridge circuit;
Described electrical heating wire is three-phase electricity heater strip, and the A phase input of described three-phase electricity heater strip connects the electrical heating of described A phaseThe output of silk control circuit, the B phase input of three-phase electricity heater strip connects the output of described B phase electrical heating wire control circuitEnd, the C phase input of three-phase electricity heater strip connects the output of described C phase electrical heating wire control circuit.
After instant-heating electric water heater switches on power, after Master control chip MCU electrification reset, the high electricity of anti-dry control output outputFlat, now the temperature of instant-heating electric water heater does not exceed certain value (80 degree) and thermal circuit beraker CN14 in closure state (resistanceBe 0 Europe), now control triode N2 conducting, relay K 1 coil electricity, its public electric shock with often open and be connected, and exchangeThe coil of contactor CN13 is not powered, and in "on" position, at this moment three-phase electricity is by the ac contactor of A.C. contactor CN13Point is connected heating control circuit, adds after heat flow when discharge reaches to start, and main control chip MCU can control heating control circuitStart heating.
In the process of heating, the anti-dry testing circuit detecting in control circuit can be by bridge circuit to adding thermal control electricityReal-Time Monitoring is carried out on road, now detects the output port output high level signal of control circuit, the detection input of main control chip MCUEnd detects this high level and judges that system heating is in normal condition, otherwise judges that heating system goes wrong;
When in the instant-heating electric water heater normal heating course of work, thermal circuit beraker (CN14) locates to detect that temperature exceedes 80 degree, itResistance can moment become infinity, relay K 1 coil blackout, and public electric shock is connected with normal-closed end, now ac contactorOn the coil of device (CN13), there is electric current to flow through, tripping operation immediately, in off-state, now the total electricity of machine is closed, and stops and continues to addHeat, prevents that dry-fire condition from occurring.
In addition, in the instant-heating electric water heater normal heating course of work, when main control chip MCU detects that discharge is lower than starting heatingWhen flow, anti-dry control output output low level immediately, the state variation normally off of relay K 1, now ac contactorOn device (CN13), there is electric current to flow through, tripping operation immediately, in off-state, now the total electricity of machine is closed, and stops and continues heating, preventsDry-fire condition occurs;
When after A.C. contactor CN13 tripping operation, the power supply of instant-heating electric water heater is cut off, and protection machine is burned, and now needsWhether the every assembly of inspection machine normal, confirm all normal after, need to press the reset key on A.C. contactor CN13, hand overStream contactor CN13 recovers original normally off.
Embodiment 2:
Instant-heating electric water heater anti-dry as shown in Figure 2 detects holding circuit, and difference from Example 1 is: described electricityHeater strip is single-phase electricity heater strip, and the live wire input of described single-phase electricity heater strip connects described A phase electrical heating wire control circuitOutput, the zero line input of described single-phase electricity heater strip connects the output of described B phase electrical heating wire control circuit.
Claims (4)
1. instant-heating electric water heater anti-dry detects holding circuit, it is characterized in that: comprise detect control circuit, heating control circuit,Main control chip, power module and electrical heating wire, described detection control circuit comprises bridge circuit, anti-dry testing circuit, anti-dryBurn holding circuit and three-phase ac contactor, described anti-dry testing circuit comprises current-limiting resistance and photoelectrical coupler, described photoelectricityCoupler is connected with the output of described bridge circuit by current-limiting resistance, the output of described photoelectrical coupler and described master control coreThe detection input of sheet connects; Described anti-dry holding circuit comprises thermal circuit beraker, relay and control triode, and described heat is disconnectedThe input of road device connects power module, and the output of thermal circuit beraker connects the coil input end of described relay, the line of relayCircle output connects the colelctor electrode that controls triode, controls the grounded emitter of triode, controls base stage and the described master of triodeThe anti-dry control output of control chip connects; The output of described bridge circuit is also defeated with the coil control of three-phase ac contactorEnter end and connect, the coil control output end of three-phase ac contactor is connected with the common of relay, described relay normally closedContact is connected with the output of bridge circuit, and described electrical heating wire is three-phase electricity heater strip or single-phase electricity heater strip, described in add thermal controlCircuit processed comprises A phase electrical heating wire control circuit, B phase electrical heating wire control circuit and C phase electrical heating wire control circuit, described AThe input of phase electrical heating wire control circuit is connected with the A phase output terminal contact of described three-phase ac contactor, described B mutually electricity addThe input of heated filament control circuit is connected with the B phase output terminal contact of described three-phase ac contactor, the control of described C phase electrical heating wireThe input of circuit processed is connected with the C phase output terminal contact of described three-phase ac contactor, described A phase electrical heating wire control circuitControl end, B phase electrical heating wire control circuit control end, C phase electrical heating wire control circuit control end all with described master control coreThe heating wire control output end of sheet connects, the detection output of A phase electrical heating wire control circuit, B phase electrical heating wire control circuitThe detection output that detects output, C phase electrical heating wire control circuit is all connected with the input of described bridge circuit.
2. instant-heating electric water heater anti-dry as claimed in claim 1 detects holding circuit, it is characterized in that: described power moduleFor 12V power module.
3. instant-heating electric water heater anti-dry as claimed in claim 1 detects holding circuit, it is characterized in that: described electrical heating wireFor three-phase electricity heater strip, the A phase input of described three-phase electricity heater strip connects the output of described A phase electrical heating wire control circuit,The B phase input of three-phase electricity heater strip connects the output of described B phase electrical heating wire control circuit, the C phase of three-phase electricity heater stripInput connects the output of described C phase electrical heating wire control circuit.
4. instant-heating electric water heater anti-dry as claimed in claim 1 detects holding circuit, it is characterized in that: described electrical heating wireFor single-phase electricity heater strip, the live wire input of described single-phase electricity heater strip connects the output of described A phase electrical heating wire control circuit,The zero line input of described single-phase electricity heater strip connects the output of described B phase electrical heating wire control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520904815.2U CN205248769U (en) | 2015-11-11 | 2015-11-11 | Instant heating electric water heater prevents that dry combustion method detects protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520904815.2U CN205248769U (en) | 2015-11-11 | 2015-11-11 | Instant heating electric water heater prevents that dry combustion method detects protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205248769U true CN205248769U (en) | 2016-05-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520904815.2U Withdrawn - After Issue CN205248769U (en) | 2015-11-11 | 2015-11-11 | Instant heating electric water heater prevents that dry combustion method detects protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205248769U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2015
- 2015-11-11 CN CN201520904815.2U patent/CN205248769U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105406443B (en) * | 2015-11-11 | 2018-02-06 | 无锡联力电子科技股份有限公司 | Instant-heating electric water heater anti-dry detects protection circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160518 Effective date of abandoning: 20180206 |
|
| AV01 | Patent right actively abandoned |