CN207922583U - Single-phase electric water-boiling device final stage control protective unit - Google Patents
Single-phase electric water-boiling device final stage control protective unit Download PDFInfo
- Publication number
- CN207922583U CN207922583U CN201820111557.6U CN201820111557U CN207922583U CN 207922583 U CN207922583 U CN 207922583U CN 201820111557 U CN201820111557 U CN 201820111557U CN 207922583 U CN207922583 U CN 207922583U
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- China
- Prior art keywords
- relay
- protective
- boiler
- electrothermal tube
- firewire
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Abstract
The utility model discloses a kind of single-phase electric water-boiling device final stage control protective units, including boiler electrothermal tube, working relay, protective relay, mutual inductor, protect circuit, the zero curve of one end connection power supply of the boiler electrothermal tube, the other end is connect with firewire, firewire is equipped with working relay and protective relay, protective relay is located at close to the side of electrothermal tube, firewire between working relay and protective relay is around the primary for being located at the mutual inductor, the secondary of mutual inductor is connected with protection circuit by the conducting wire of winding, the other end of protection circuit is connected with boiler intelligent controller.The protective device of the utility model is under boiler normal heating working condition; occur that wiring circuit contact is bad or the failure of relay contact adhesion; the supply line of electrothermal tube can be cut off immediately; it is simultaneously emitted by buzzing alarm; until continueing to complete machine by artificial shut down, is effectively prevented fire, water tank explosion or steam and leaked accident.
Description
Technical field
The utility model is related to a kind of boiler protective devices, and in particular to a kind of single-phase electric water-boiling device final stage control protection
Device.
Background technology
Current household and commercial water heating device are very universal, and control circuit is that prime uses microcomputer singlechip intelligence mostly
Chip can be controlled, this part of comparative maturity is stablized, and rear class is connected to high-power electricity using relay or A.C. contactor
Heat pipe.For the power of electrothermal tube from two kilowatts to 12 kilowatt, operating current is big, once relay contact adhesion, the temperature of boiler
Degree is inevitable out of control, although CPU has had been sent from the instruction for stopping heating, the relay of adhesion can allow electrothermal tube to continue work
Make, just there is the danger of explosion if it is the water tank of sealing, even if there is the water tank of steam exhaust pipe not explode, also can steam it is largely outer
Let out generation scald accident.In addition, by the accident analysis to the commercial water heating device of " spontaneous combustion " we have found that：These boilers are sent out
Raw failure is mainly due to caused by the connection line aging or poor contact of relay control panel to electrothermal tube.Due to electric heating
Pipe operating current is big, powerful electric arc is will produce once aging circuit or poor contact, electric spark be enough to allow boiler from
It fires and leads to fire incident.The present invention is designed aiming at the two fatal risk failures of boiler, uses me
The boiler rear class of company protects circuit, even if artificial simulated failure, this protector can be effectively protected action, completely
Prevent the generation of accident.
Utility model content
Utility model aims to solve above-mentioned technical problems, provide a kind of single-phase electric water-boiling device final stage control protection
Device, effectively prevent because relay contact adhesion or aging circuit cause water tank of water boiler explosion, steam leaks or fire incident
Generation.
In order to achieve the above object, the utility model is achieved through the following technical solutions：
A kind of single-phase electric water-boiling device final stage control protective unit, including boiler electrothermal tube, working relay, protection relay
Device, mutual inductor, protection circuit, boiler intelligent controller, it is characterised in that：One end of the boiler electrothermal tube connects power supply
Zero curve, the other end connect with firewire, and the firewire is equipped with working relay and protective relay, and the protective relay is set
Close to the side of electrothermal tube, the firewire between working relay and protective relay is around the primary for being located at the mutual inductor, institute
The secondary conducting wire by winding for stating mutual inductor is connected with protection circuit, and the other end of the protection circuit is connected with boiler intelligence
It can controller.
Further, the working relay is in normally open, and protective relay is in normally off.
The beneficial effects of the utility model：The final stage protector of the utility model is in boiler normal heating working condition
Under, if aging circuit poor contact, can protection act immediately, stop the power supply to electrothermal tube and send out buzzing alarm,
And protection alarm condition is continued until that the artificial deenergization of complete machine just terminates, to effectively prevent the generation of fire incident.
And there is relay contact adhesion to (water tank temperature 95-100 degree at this time) in the state of heating is stopped in boiler normal work
Failure, the supply line that protection circuit can also act cut-out electrothermal tube immediately is simultaneously emitted by buzzing alarm, and protects report
Until alert state is continued until complete machine by artificial shut down, to effectively prevent water tank to explode or the accident of steam a lot of leakage
Occur.
Description of the drawings
Fig. 1 is the electrical schematic diagram of the utility model protective device；
Fig. 2 is the circuit diagram of the protection circuit of the utility model.
Specific implementation mode
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is further described.
As depicted in figs. 1 and 2, a kind of single-phase electric water-boiling device final stage control protective unit, including boiler electrothermal tube R, work
Make relay J1, protective relay J2, mutual inductor L, protection circuit, boiler intelligent controller, it is characterised in that：The boiling water
The zero curve of one end connection power supply of device electrothermal tube R, the other end are connect with firewire, and the firewire is equipped with working relay J1 and guarantor
Protect relay J2, the protective relay J2 is located at close to the side of electrothermal tube R, working relay J1 and protective relay J2 it
Between firewire around the primary for being located at the mutual inductor L, the secondary conducting wire by winding of the mutual inductor L is connected with protection electricity
The other end on road, the protection circuit is connected with boiler intelligent controller.
The heater switch circuit of electrothermal tube R is made of working relay J1 and protective relay J2 in the utility model, work
Making relay J1 takes normally opened contact, protective relay J2 to take normally-closed contact.When normal work, electric heating after working relay J1 is attracted
Pipe R obtains electrical heating, and the contacts working relay J1 discharge rear electrothermal tube R and stop heating, when protecting circuit to detect line anomalies, protects
Relay J2 is protected to be attracted, normally-closed contact disconnects, and at this moment no matter whether working relay J1 is attracted, the both ends electrothermal tube R all no-voltages,
To make machine be in guard mode, since protective relay J2 uses normally-closed contact, failsafe that would not disconnect, institute
Longer than common relay with its contact service life, probability of malfunction is several a ten thousandths of common relay probability of malfunction.
Protect the operation principle of circuit：The equivalent resistance RJ1 compositions of triode Q1, Q2 and resistance R4 and relay J1 coils
Four arms of electric bridge, when circuit works normally, there is potential difference at the both ends electric bridge AB always, and there are one places always by photoelectrical coupler N1 or N2
In conducting state, Q3 is also at conducting state, then positioned at C points voltage always be in low potential, triode Q4 with it is silicon-controlled
Q5 is not turned on, protective relay J2 will not work once electrified, this state is the normal operating conditions of boiler；When boiler intelligence
When control prime is in heated condition, controller can input a high level, Q1 conductings in D points, and relay J1 is attracted, electrothermal tube
Electric normal work is obtained, operating current flows through the primary of mutual inductor L and generates induction alternating voltage in the secondary of L, which passes through
The C1 filtering of D2, D3, D4, D5 bridge rectifier capacitance generates left negative right positive DC voltage and is added on optocoupler N3 by R5, and N3, Q2 are led
It is logical, that is, Q1 and Q2 are to simultaneously turn on, on the contrary also to end simultaneously so that there is potential difference at the both ends A, B always, also allow for optocoupler
It is in the conduction state there are one N1, N2 are total, keep Q3 also constantly on, C points are constantly in low potential, the protection electricity of Q4, Q5 composition
Road would not act.Once relay contact adhesion either electrothermal tube and its connecting line poor contact or open circuit, the both ends A, B are just
Will appear equipotential, N1, N2, Q3 are turned off, and C point voltages, which are charged by R6 to C3, to be risen rapidly, and 5 volts or so Q4 conductings are risen to,
To trigger silicon-controlled Q5 conductings so that protective relay J2 is attracted, buzzer is simultaneously emitted by alarm, the power supply of electrothermal tube R
It is safely disconnected, machine enters guard mode.
Make protection device as a result of silicon-controlled, protection reliability greatly improves, and has to just move back to complete machine power-off
Go out guard mode, protection sensitivity determines that general control is in 0.3-1s or so by the time constant of resistance R6 and capacitance C3；R6 and
The access of C3 delay circuits also effectively prevents relay switch moment from generating accidentally protection.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection domain within.
Claims (2)
1. a kind of single-phase electric water-boiling device final stage control protective unit, including boiler electrothermal tube, working relay, protection relay
Device, mutual inductor, protection circuit, boiler intelligent controller, it is characterised in that：One end of the boiler electrothermal tube connects power supply
Zero curve, the other end connect with firewire, and the firewire is equipped with working relay and protective relay, and the protective relay is set
Close to the side of electrothermal tube, the firewire between working relay and protective relay is around the primary for being located at the mutual inductor, institute
The secondary conducting wire by winding for stating mutual inductor is connected with protection circuit, and the other end of the protection circuit is connected with boiler intelligence
It can controller.
2. single-phase electric water-boiling device final stage control protective unit according to claim 1, it is characterised in that：The work relay
Device is in normally open, and protective relay is in normally off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820111557.6U CN207922583U (en) | 2018-01-23 | 2018-01-23 | Single-phase electric water-boiling device final stage control protective unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820111557.6U CN207922583U (en) | 2018-01-23 | 2018-01-23 | Single-phase electric water-boiling device final stage control protective unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207922583U true CN207922583U (en) | 2018-09-28 |
Family
ID=63605335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820111557.6U Expired - Fee Related CN207922583U (en) | 2018-01-23 | 2018-01-23 | Single-phase electric water-boiling device final stage control protective unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207922583U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112941839A (en) * | 2021-01-27 | 2021-06-11 | 江苏广中电子科技有限公司 | Safety protection measure of washing machine with heating function |
-
2018
- 2018-01-23 CN CN201820111557.6U patent/CN207922583U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112941839A (en) * | 2021-01-27 | 2021-06-11 | 江苏广中电子科技有限公司 | Safety protection measure of washing machine with heating function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180928 Termination date: 20220123 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |