CN204664554U - A kind of air valve control circuit and gas water-heater - Google Patents
A kind of air valve control circuit and gas water-heater Download PDFInfo
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- CN204664554U CN204664554U CN201420635558.2U CN201420635558U CN204664554U CN 204664554 U CN204664554 U CN 204664554U CN 201420635558 U CN201420635558 U CN 201420635558U CN 204664554 U CN204664554 U CN 204664554U
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- air valve
- npn type
- type triode
- feedback signal
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Abstract
The utility model discloses a kind of air valve control circuit and gas water-heater, the master control branch road that described air valve control circuit comprises control unit and is connected with described control unit, described master control branch road is connected in the current supply circuit of air valve, and the on state of described master control branch road accepts the control of described control unit, also comprise the feedback signal controlling brancher be connected with described control unit, electrically switchable grating is in series with in the current supply circuit of described air valve, described feedback signal controlling brancher receives rotation speed of fan feedback signal or the water flow feedback signal of the transmission of described control unit, and control described electrically switchable grating conducting according to described rotation speed of fan feedback signal or water flow feedback signal or close.Air valve control circuit of the present utility model, be provided with feedback signal controlling brancher, can using rotation speed of fan feedback signal or water flow feedback signal as the necessary condition controlling air valve opening, when above-mentioned condition does not meet, still can not open air valve, Security is higher.
Description
Technical field
The utility model relates to a kind of air valve control circuit and gas water-heater.
Background technique
Current gas water-heater adopts airtight firing chamber, needs to deliver in firing chamber by the mode of blower fan air blast by air in combustion process, and the effect of blower fan in gas water-heater is most important.If blower fan breaks down in combustion process, to input air in firing chamber, firing chamber reducing fire cannot can be caused, and tail gas cannot emit in time, when in air, the concentration of combustion gas reaches certain proportion, there is great potential safety hazard in the serious consequence that firing chamber can be caused to explode.
Although more existing gas water-heater is by microprocessor control circuit air valve and blower fan, the pulse of certain frequency can be exported after fan starting to microprocessor during gas water heater working, microprocessor judges current blower fan wind speed by the number of pulse, and then to transmit control signal to air valve and realize control to air valve, but there is certain unreliability in the control circuit of this pattern, when air valve hardware-in-the-loop goes wrong, even if when blower fan has stopped or wind speed does not reach the value of needs, air valve still can conducting, cause gas leakage, or firing chamber reducing fire, and tail gas cannot emit in time, still there is larger potential safety hazard.
Summary of the invention
The utility model is in order to solve the low problem of existing gas water-heater Safety performance, propose a kind of air valve control circuit, can be coupled in air valve control circuit by rotation speed of fan feedback signal or water flow feedback signal, participate in the control of air valve, Safety performance is high.
In order to solve the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of air valve control circuit, the master control branch road comprising control unit and be connected with described control unit, described master control branch road is connected in the current supply circuit of air valve, and the on state of described master control branch road accepts the control of described control unit, also comprise the feedback signal controlling brancher be connected with described control unit, electrically switchable grating is in series with in the current supply circuit of described air valve, described feedback signal controlling brancher receives rotation speed of fan feedback signal or the water flow feedback signal of the transmission of described control unit, and control described electrically switchable grating conducting according to described rotation speed of fan feedback signal or water flow feedback signal or close.
Further, described feedback signal controlling brancher comprises the first NPN type triode, the collector electrode of described first NPN type triode is connected with DC electrical source by a relay, the emitter of described first NPN type triode connects grounding end, the base stage of described first NPN type triode is connected with described control unit by the first bootstrap charge circuit loop, and described electrically switchable grating is the normally opened contact of described relay.
Further, described first bootstrap charge circuit loop comprises the first electric capacity, second diode, 3rd diode, second resistance and the first electrochemical capacitor, described second resistance and described 3rd diode are in series composition first series arm, and described first series arm is connected in parallel on base stage and the emitter two ends of described first NPN type triode, described first electrochemical capacitor is connected in parallel on base stage and the emitter two ends of described first NPN type triode, described second diode is connected between described first series arm and described first electrochemical capacitor, described first electric capacity is connected between described control unit and described first series arm.
Further, the first resistance is also in series with between described first bootstrap charge circuit loop and the base stage of described first NPN type triode.
Further, the 3rd resistance is also parallel with between the base stage of described first NPN type triode and emitter.
Further, described master control branch road comprises the second NPN type triode, be connected with valve body power supply after the collector electrode of described second NPN type triode is sequentially connected in series air valve, electrically switchable grating, the emitter of described second NPN type triode connects grounding end, and the base stage of described second NPN type triode is connected with described control unit by the second bootstrap charge circuit loop.
Further, described second bootstrap charge circuit loop comprises the second electric capacity, 5th diode, 6th diode, 5th resistance and the second electrochemical capacitor, described 5th resistance and described 6th diode are in series composition second series arm, and described second series arm is connected in parallel on base stage and the emitter two ends of described second NPN type triode, described second electrochemical capacitor is connected in parallel on base stage and the emitter two ends of described second NPN type triode, described 5th diode is connected between described second series arm and described second electrochemical capacitor, described second electric capacity is connected between described control unit and described second series arm.
Further, the 4th resistance is also in series with between described second bootstrap charge circuit loop and the base stage of described second NPN type triode.
Further, the 6th resistance is also parallel with between the base stage of described second NPN type triode and emitter.
Based on above-mentioned air valve control circuit, the utility model proposes a kind of gas water-heater simultaneously, comprises the air valve control circuit as described in front any one.
Compared with prior art, advantage of the present utility model and good effect are: air valve control circuit of the present utility model, be provided with feedback signal controlling brancher, rotation speed of fan feedback signal or water flow feedback signal can be carried out changing participates in the control of air valve, even if when the master control branch road of air valve breaks down, rotation speed of fan feedback signal or water flow feedback signal are as the necessary condition controlling air valve opening, when above-mentioned condition does not meet, still air valve can not be opened, therefore, the Security of this air valve control circuit is higher.
After reading the detailed description of the utility model mode of execution by reference to the accompanying drawings, other features of the present utility model and advantage will become clearly.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of embodiment's skeleton diagram of the air valve control circuit that the utility model proposes;
Fig. 2 is the circuit theory diagrams of a kind of embodiment of the air valve control circuit that the utility model proposes.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technological scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Embodiment one, the present embodiment is example by combining the gas water-heater with above-mentioned air valve control circuit, this air valve control circuit is described in detail, as shown in Figure 1, the master control branch road that air valve control circuit in the present embodiment comprises control unit and is connected with described control unit, described master control branch road is connected in the current supply circuit of air valve L1, and the on state of described master control branch road accepts the control of described control unit, also comprise the feedback signal controlling brancher be connected with described control unit, electrically switchable grating is in series with in the current supply circuit of described air valve, described feedback signal controlling brancher receives rotation speed of fan feedback signal or the water flow feedback signal of the transmission of described control unit, and control described electrically switchable grating conducting according to described rotation speed of fan feedback signal or water flow feedback signal or close.The air valve control circuit of the present embodiment, be provided with feedback signal controlling brancher, rotation speed of fan feedback signal or water flow feedback signal can be carried out changing participates in the control of air valve, even if when the master control branch road of air valve breaks down, rotation speed of fan feedback signal or water flow feedback signal are as the necessary condition controlling air valve L1 aperture, when above-mentioned condition does not meet, still air valve can not be opened, therefore, the Security of this air valve control circuit is higher, and described water flow feedback signal is exported by flow module.
As a preferred embodiment, as shown in Figure 2, described feedback signal controlling brancher comprises the first NPN type triode N1, the collector electrode of described first NPN type triode N1 is connected with DC electrical source by a relay K 1, the emitter of described first NPN type triode N1 connects grounding end, the base stage of described first NPN type triode N1 is connected with control unit U1 by the first bootstrap charge circuit loop, and in the present embodiment, electrically switchable grating is the normally opened contact of described relay K 1.The pulse of certain frequency or the size according to water flow can be exported after fan starting during gas water heater working, control unit U1 controls the pulse exporting certain frequency, and control unit U1 can judge current blower fan wind speed or flow rate of water flow by the number of pulse, this air valve control circuit is by arranging the first bootstrap charge circuit loop, when the pulse that control unit U1 exports reaches a certain number of, the voltage of the base stage of the first NPN type triode N1 raises by this first bootstrap charge circuit loop, when after the conducting voltage being elevated to N1, N1 conducting, relay K 1 powers on, now normally opened contact adhesive, when master control branch road meets turn-on condition simultaneously, the current supply circuit conducting of air valve L1, also namely air valve L1 can be opened.When needs air valve is closed, control unit U1 sends shutdown signal to master control branch road, and the current supply circuit of air valve L1 is closed, therefore air valve L1 also corresponding closedown.
In the present embodiment, as shown in Figure 2, described first bootstrap charge circuit loop comprises the first electric capacity C1, second diode D2, 3rd diode D2, second resistance R2 and the first electrochemical capacitor E1, described second resistance R2 and described 3rd diode D3 is in series composition first series arm, and described first series arm is connected in parallel on base stage and the emitter two ends of described first NPN type triode N1, described first electrochemical capacitor E1 is connected in parallel on base stage and the emitter two ends of described first NPN type triode N1, described second diode D2 is connected between described first series arm and described first electrochemical capacitor E1, described first electric capacity C1 is connected between described control unit U1 and described first series arm.
In the present embodiment, between described first bootstrap charge circuit loop and the base stage of described first NPN type triode N1, be also in series with the first resistance R1, be used for restriction first NPN type triode N1 base current, prevent triode from burning.
In the present embodiment, the 3rd resistance R3 is also parallel with between the base stage of described first NPN type triode N1 and emitter, when preventing at powered on moment or do not have Puled input, base stage and the emitter pressure reduction of the first NPN type triode N1 are 0V, guarantee that triode N1 is in closed condition.
In the present embodiment, as shown in Figure 2, described master control branch road comprises the second NPN type triode N2, be connected with valve body power supply after the collector electrode of described second NPN type triode N2 is sequentially connected in series air valve L1, electrically switchable grating, the emitter of described second NPN type triode N2 connects grounding end, and the base stage of described second NPN type triode N2 is connected with described control unit U1 by the second bootstrap charge circuit loop.Control unit U1 exports the pulse of certain frequency to master control branch road, this air valve control circuit is by arranging the second bootstrap charge circuit loop, when the pulse that control unit U1 exports reaches a certain number of, the voltage of the base stage of the second NPN type triode N2 raises by this second bootstrap, when after the conducting voltage being elevated to N2, and N2 conducting, power on when meeting relay K 1 simultaneously, during normally opened contact adhesive, namely the current supply circuit conducting of air valve L1, also can open air valve L1.Otherwise, when rotation speed of fan or water flow can not meet the condition of the current supply circuit conducting making air valve L1, first NPN type triode N1 cut-off of feedback signal controlling brancher, the normally opened contact of relay K 1 disconnects, even if the base voltage of the second NPN type triode N2 of master control branch road meets unlocking condition, air valve L1 also cannot be made to open.
In the present embodiment, described second bootstrap charge circuit loop comprises the second electric capacity C2, 5th diode D5, 6th diode D6, 5th resistance R5 and the second electrochemical capacitor E2, described 5th resistance R5 and described 6th diode D6 is in series composition second series arm, and described second series arm is connected in parallel on base stage and the emitter two ends of described second NPN type triode N2, described second electrochemical capacitor E2 is connected in parallel on base stage and the emitter two ends of described second NPN type triode N2, described 5th diode D5 is connected between described second series arm and described second electrochemical capacitor E2, described second electric capacity C2 is connected between described control unit U1 and described second series arm.
The 4th resistance R4 is also in series with between described second bootstrap charge circuit loop and the base stage of described second NPN type triode N2.
The 6th resistance R6 is also parallel with between the base stage of described second NPN type triode N2 and emitter.
Certainly; above-mentioned explanation is not to restriction of the present utility model; the utility model is also not limited in above-mentioned citing, the change that those skilled in the art make in essential scope of the present utility model, remodeling, interpolation or replacement, also should belong to protection domain of the present utility model.
Claims (10)
1. an air valve control circuit, the master control branch road comprising control unit and be connected with described control unit, described master control branch road is connected in the current supply circuit of air valve, and the on state of described master control branch road accepts the control of described control unit, it is characterized in that: also comprise the feedback signal controlling brancher be connected with described control unit, electrically switchable grating is in series with in the current supply circuit of described air valve, described feedback signal controlling brancher receives rotation speed of fan feedback signal or the water flow feedback signal of the transmission of described control unit, and control described electrically switchable grating conducting according to described rotation speed of fan feedback signal or water flow feedback signal or close.
2. air valve control circuit according to claim 1, it is characterized in that: described feedback signal controlling brancher comprises the first NPN type triode, the collector electrode of described first NPN type triode is connected with DC electrical source by a relay, the emitter of described first NPN type triode connects grounding end, the base stage of described first NPN type triode is connected with described control unit by the first bootstrap charge circuit loop, and described electrically switchable grating is the normally opened contact of described relay.
3. air valve control circuit according to claim 2, it is characterized in that: described first bootstrap charge circuit loop comprises the first electric capacity, second diode, 3rd diode, second resistance and the first electrochemical capacitor, described second resistance and described 3rd diode are in series composition first series arm, and described first series arm is connected in parallel on base stage and the emitter two ends of described first NPN type triode, described first electrochemical capacitor is connected in parallel on base stage and the emitter two ends of described first NPN type triode, described second diode is connected between described first series arm and described first electrochemical capacitor, described first electric capacity is connected between described control unit and described first series arm.
4. air valve control circuit according to claim 3, is characterized in that: be also in series with the first resistance between described first bootstrap charge circuit loop and the base stage of described first NPN type triode.
5. air valve control circuit according to claim 4, is characterized in that: be also parallel with the 3rd resistance between the base stage of described first NPN type triode and emitter.
6. the air valve control circuit according to any one of claim 1-5, it is characterized in that: described master control branch road comprises the second NPN type triode, be connected with valve body power supply after the collector electrode of described second NPN type triode is sequentially connected in series air valve, electrically switchable grating, the emitter of described second NPN type triode connects grounding end, and the base stage of described second NPN type triode is connected with described control unit by the second bootstrap charge circuit loop.
7. air valve control circuit according to claim 6, it is characterized in that: described second bootstrap charge circuit loop comprises the second electric capacity, 5th diode, 6th diode, 5th resistance and the second electrochemical capacitor, described 5th resistance and described 6th diode are in series composition second series arm, and described second series arm is connected in parallel on base stage and the emitter two ends of described second NPN type triode, described second electrochemical capacitor is connected in parallel on base stage and the emitter two ends of described second NPN type triode, described 5th diode is connected between described second series arm and described second electrochemical capacitor, described second electric capacity is connected between described control unit and described second series arm.
8. air valve control circuit according to claim 7, is characterized in that: be also in series with the 4th resistance between described second bootstrap charge circuit loop and the base stage of described second NPN type triode.
9. air valve control circuit according to claim 8, is characterized in that: be also parallel with the 6th resistance between the base stage of described second NPN type triode and emitter.
10. a gas water-heater, is characterized in that: comprise the air valve control circuit as described in any one of claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420635558.2U CN204664554U (en) | 2014-10-30 | 2014-10-30 | A kind of air valve control circuit and gas water-heater |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420635558.2U CN204664554U (en) | 2014-10-30 | 2014-10-30 | A kind of air valve control circuit and gas water-heater |
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| CN204664554U true CN204664554U (en) | 2015-09-23 |
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| CN201420635558.2U Active CN204664554U (en) | 2014-10-30 | 2014-10-30 | A kind of air valve control circuit and gas water-heater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108039875A (en) * | 2017-11-29 | 2018-05-15 | 青岛海尔科技有限公司 | A kind of control circuit of refrigerator ozone generator |
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2014
- 2014-10-30 CN CN201420635558.2U patent/CN204664554U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108039875A (en) * | 2017-11-29 | 2018-05-15 | 青岛海尔科技有限公司 | A kind of control circuit of refrigerator ozone generator |
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