CN2811968Y - Intelligent wind pressure detector - Google Patents
Intelligent wind pressure detector Download PDFInfo
- Publication number
- CN2811968Y CN2811968Y CN 200520062222 CN200520062222U CN2811968Y CN 2811968 Y CN2811968 Y CN 2811968Y CN 200520062222 CN200520062222 CN 200520062222 CN 200520062222 U CN200520062222 U CN 200520062222U CN 2811968 Y CN2811968 Y CN 2811968Y
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- blower fan
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Abstract
The utility model relates to an intelligent wind pressure detector and a detecting method thereof for a gas water heater and a wall-mounted dual-purpose gas stove. The intelligent wind pressure detector of the utility model comprises an SCM, a buffer amplifying circuit, a blower driving circuit, a voltage sampling circuit, a current sampling circuit, a linear amplifying and filtering circuit, and a power circuit, wherein the power circuit supplies power for the SCM and each circuit, PWM signal which is output by the SCM is connected with an input end of the buffer amplifying circuit, an output end of the buffer amplifying circuit is connected to an input end of the blower driving circuit, signal output by the blower driving circuit drives a blower to move, the voltage sampling circuit and the current sampling circuit respectively collect the voltage signal and the current signal of the blower, an output end of the voltage sampling circuit is connected with an input end of the SCM, an output end of the current sampling circuit is connected with an input end of the linear amplifying and filtering circuit, and an output end of the linear amplifying and filtering circuit is connected to the input end of the SCM. The intelligent wind pressure detector of the utility model solves the shortage of using a wind pressure switch and removes the wind pressure switch, which directly reduces the cost and increase the reliability.
Description
1, technical field:
The utility model relates to a kind of intelligent wind pressure detecting device that is used for gas heater and fuel wall hanging formula dual-purpose stove, belongs to the renovation technique of intelligent wind pressure detecting device.
2, background technology:
At present, gas heater and fuel wall hanging formula dual-purpose stove all adopt a kind of device (element) that is called blast switch to detect pressure in the firing chamber, and when working properly, pressure is enough big, the blast switch action; When blower fan undesired or the smoke evacuation not smooth, pressure is little, the blast switch akinesia, thereby play a protective role.The shortcoming of its existence is: blast switch is can only be at certain pressure point closed or disconnect, and when needs during to fan speed regulation, the blast switch bad adaptability maybe can't be used.
3, utility model content:
The purpose of this utility model is to consider the problems referred to above and provides a kind of in the whole range of speeds of blower fan, has realized that the water heater combustion gas detects blast and the intelligent wind pressure detecting device of blast defencive function.The utility model has not only solved and has used the deficiency of blast switch, and has cancelled the blast switch device, directly reduces cost, and has improved reliability.
Theory diagram of the present utility model as shown in Figure 1, include single-chip microcomputer (1), buffer amplifier circuit (2), blower fan driving circuit (3), voltage sample circuit (4), current sampling circuit (5), linear amplification and filtering circuit (6), power circuit (7), power circuit (7) provides power supply for single-chip microcomputer (1) and each circuit, the pwm signal of single-chip microcomputer (1) output is connected with the input end of buffer amplifier circuit (2), the output terminal of buffer amplifier circuit (2) is connected with the input end of blower fan driving circuit (3), the output signal of blower fan driving circuit (3) drives blower fan (8) motion, voltage sample circuit (4) and current sampling circuit (5) are gathered the voltage signal and the current signal of blower fan (8) respectively, the output terminal of voltage sample circuit (4) is connected with the input end of single-chip microcomputer (1), the output terminal of current sampling circuit (5) is connected with the input end of linear amplification and filtering circuit (6), and the output terminal of linear amplification and filtering circuit (6) is connected with the input end of single-chip microcomputer (1).
Above-mentioned buffer amplifier circuit (2) includes resistance R 2, R4, R11, triode Q2, the base stage of triode Q2 is connected with the output terminal of single-chip microcomputer (1) by resistance R 11, the grounded emitter of triode Q2, the collector of triode Q2 is connected with power circuit (7) and is connected with the input end of blower fan driving circuit (3) by resistance R 2, R4.
Above-mentioned blower fan driving circuit (3) is the switch regulating circuit, include switching tube Q1, energy storage inductor L1, sustained diode 2, wherein the emitter of switching tube Q1 is connected with the resistance R 2 of buffer amplifier circuit (2), the base stage of switching tube Q1 is connected with the resistance R 4 of buffer amplifier circuit (2), the collector of switching tube Q1 is connected with the end of energy storage inductor L1 and the negative pole of sustained diode 2, the plus earth of sustained diode 2, the other end of energy storage inductor L1 is connected with blower fan (8).
Above-mentioned switching tube Q1 is big electric current PNP power tube or P type field effect transistor.
Above-mentioned voltage sample circuit (4) includes voltage sampling resistor R5, R6, and voltage sampling resistor R5, the end of R6 is connected with blower fan (8), and the other end is connected with the voltage sample input port of single-chip microcomputer (1).
Above-mentioned current sampling circuit (5) includes current sampling resistor R10, and current sampling resistor R10 is connected on blower fan (8).
Above-mentioned linear amplification and filtering circuit (6) include operational amplifier IC1A, IC1B, resistance R 7, R9, R15, R16, R18, R13, R14, capacitor C 3, C6, wherein the positive input terminal of operational amplifier IC1A is connected with current sampling resistor R10 by resistance R 7, resistance R 16 is connected and connects by resistance R 17 positive input terminal of IC1A with diode D3, diode D3 other end ground connection, the negative input end of operational amplifier IC1A respectively with resistance R 9, the end of R15 connects, the other end ground connection of resistance R 9, the output terminal of operational amplifier IC1A is by resistance R 13, capacitor C 6 is connected with the output terminal of operational amplifier IC1B and is connected with the current sample input port of single-chip microcomputer (1) by resistance R 18, the positive input terminal of operational amplifier IC1B is connected with an end of resistance R 14 and by capacitor C 3 ground connection, the other end of resistance R 14 respectively with resistance R 13, capacitor C 6 connects, and the output terminal of operational amplifier IC1B is connected with negative input end.
Above-mentioned operational amplifier IC1A, IC1B are LM358.
Above-mentioned power circuit (7) includes bridge rectifier circuit DB1 and filter capacitor C1, and the input end of bridge rectifier circuit DB1 is connected the two ends of power supply, and filter capacitor C1 is connected the output terminal of bridge rectifier circuit DB1.
The utility model wind pressure detection device utilizes dc fan under certain voltage; electric current increases with the increase of load; the characteristic that rotation speed of fan reduces with the increase of load; by single-chip microcomputer to the computing of sampling of the state parameter of fan operation; thereby detect fans load situation (being the pressure in the firing chamber) exactly, realize detection and protection blast.The utility model wind pressure detection device is in the whole range of speeds of blower fan; realized that the water heater combustion gas detects and the blast defencive function blast, not only solved and used the deficiency of blast switch, and cancelled the blast switch device; directly reduce cost, improved reliability.
4, description of drawings:
Fig. 1 is a theory diagram of the present utility model;
Fig. 2 is a circuit diagram of the present utility model.
5, embodiment:
Embodiment:
Theory diagram of the present utility model as shown in Figure 1, include single-chip microcomputer 1, buffer amplifier circuit 2, blower fan driving circuit 3, voltage sample circuit 4, current sampling circuit 5, linear amplification and filtering circuit 6, power circuit 7, power circuit 7 provides power supply for single-chip microcomputer 1 and each circuit, the pwm signal of single-chip microcomputer 1 output is connected with the input end of buffer amplifier circuit 2, the output terminal of buffer amplifier circuit 2 is connected with the input end of blower fan driving circuit 3, the output signal of blower fan driving circuit 3 drives blower fan 8 motions, voltage sample circuit 4 and current sampling circuit 5 are gathered the voltage signal and the current signal of blower fan 8 respectively, the output terminal of voltage sample circuit 4 is connected with the input end of single-chip microcomputer 1, the output terminal of current sampling circuit 5 is connected with the input end of linear amplification and filtering circuit 6, and the output terminal of linear amplification and filtering circuit 6 is connected with the input end of single-chip microcomputer 1.
Circuit diagram of the present utility model as shown in Figure 2, above-mentioned buffer amplifier circuit 2 includes resistance R 2, R4, R11, triode Q2, the base stage of triode Q2 is connected with the output terminal of single-chip microcomputer 1 by resistance R 11, the grounded emitter of triode Q2, the collector of triode Q2 is connected with power circuit 7 and is connected with the input end of blower fan driving circuit 3 by resistance R 2, R4.
Above-mentioned blower fan driving circuit 3 is the switch regulating circuit, include switching tube Q1, energy storage inductor L1, sustained diode 2, wherein the emitter of switching tube Q1 is connected with the resistance R 2 of buffer amplifier circuit 2, the base stage of switching tube Q1 is connected with the resistance R 4 of buffer amplifier circuit 2, the collector of switching tube Q1 is connected with the end of energy storage inductor L1 and the negative pole of sustained diode 2, the plus earth of sustained diode 2, the other end of energy storage inductor L1 is connected with blower fan 8.Above-mentioned switching tube Q1 is big electric current PNP power tube or P type field effect transistor.In the present embodiment, above-mentioned switching tube Q1 is big electric current PNP power tube.
Above-mentioned voltage sample circuit 4 includes voltage sampling resistor R5, R6, and voltage sampling resistor R5, the end of R6 is connected with blower fan 8, and the other end is connected with the voltage sample input port of single-chip microcomputer 1.
Above-mentioned current sampling circuit 5 includes current sampling resistor R10, and current sampling resistor R10 is connected on blower fan 8.
Above-mentioned linear amplification and filtering circuit 6 include operational amplifier IC1A, IC1B, resistance R 7, R9, R15, R16, R18, R13, R14, capacitor C 3, C6, wherein the positive input terminal of operational amplifier IC1A is connected with current sampling resistor R10 by resistance R 7, resistance R 16 is connected and connects by resistance R 17 positive input terminal of IC1A with diode D3, diode D3 other end ground connection, the negative input end of operational amplifier IC1A respectively with resistance R 9, the end of R15 connects, the other end ground connection of resistance R 9, the output terminal of operational amplifier IC1A is by resistance R 13, capacitor C 6 is connected with the output terminal of operational amplifier IC1B and is connected with the current sample input port of single-chip microcomputer (1) by resistance R 18, the positive input terminal of operational amplifier IC1B is connected with an end of resistance R 14 and by capacitor C 3 ground connection, the other end of resistance R 14 respectively with resistance R 13, capacitor C 6 connects, and the output terminal of operational amplifier IC1B is connected with negative input end.In the present embodiment, above-mentioned operational amplifier IC1A, IC1B are LM358.
Above-mentioned power circuit 7 includes bridge rectifier circuit DB1 and filter capacitor C1, and the input end of bridge rectifier circuit DB1 is connected the two ends of power supply, and filter capacitor C1 is connected the output terminal of bridge rectifier circuit DB1.
The detection method of the utility model intelligent detection device includes following process:
When 1) beginning to start, single-chip microcomputer 1 drives blower fan 8 and moves with stabilized (steady-state) speed by buffer amplifier circuit 2 and blower fan driving circuit 3 given PWM values;
2) to the fan speed computing of sampling, and by the computing of sampling of the magnitude of voltage of voltage sample circuit 4 and 5 pairs of blower fan electric currents of current sampling circuit and blower fan input, given different wind speed can corresponding different electric current, magnitudes of voltage; The sampling voltage signal directly connects single-chip microcomputer A/D mouth, connects single-chip microcomputer A/D mouth behind linear amplification that current sampling signal constitutes via operational amplifier and the second-order filter circuit.
3) single-chip microcomputer 1 obtains fans load situation value, compares with the ratings of obtaining in the experiment, if deviation, can judge then that blast is undesired greater than 15%～45% ratings.In the present embodiment, if deviation, can judge then that blast is undesired greater than 35% ratings.Different burner structures, this value can be adjusted.
Claims (9)
1, a kind of intelligent wind pressure detecting device, it is characterized in that including single-chip microcomputer (1), buffer amplifier circuit (2), blower fan driving circuit (3), voltage sample circuit (4), current sampling circuit (5), linear amplification and filtering circuit (6), power circuit (7), power circuit (7) provides power supply for single-chip microcomputer (1) and each circuit, the pwm signal of single-chip microcomputer (1) output is connected with the input end of buffer amplifier circuit (2), the output terminal of buffer amplifier circuit (2) is connected with the input end of blower fan driving circuit (3), the output signal of blower fan driving circuit (3) drives blower fan (8) motion, voltage sample circuit (4) and current sampling circuit (5) are gathered the voltage signal and the current signal of blower fan (8) respectively, the output terminal of voltage sample circuit (4) is connected with the input end of single-chip microcomputer (1), the output terminal of current sampling circuit (5) is connected with the input end of linear amplification and filtering circuit (6), and the output terminal of linear amplification and filtering circuit (6) is connected with the input end of single-chip microcomputer (1).
2, intelligent wind pressure detecting device according to claim 1, it is characterized in that above-mentioned buffer amplifier circuit (2) includes resistance R 2, R4, R11, triode Q2, the base stage of triode Q2 is connected with the output terminal of single-chip microcomputer (1) by resistance R 11, the grounded emitter of triode Q2, the collector of triode Q2 is connected with power circuit (7) and is connected with the input end of blower fan driving circuit (3) by resistance R 2, R4.
3, intelligent wind pressure detecting device according to claim 1, it is characterized in that above-mentioned blower fan driving circuit (3) is the switch regulating circuit, include switching tube Q1, energy storage inductor L1, sustained diode 2, wherein the emitter of switching tube Q1 is connected with the resistance R 2 of buffer amplifier circuit (2), the base stage of switching tube Q1 is connected with the resistance R 4 of buffer amplifier circuit (2), the collector of switching tube Q1 is connected with the end of energy storage inductor L1 and the negative pole of sustained diode 2, the plus earth of sustained diode 2, the other end of energy storage inductor L1 is connected with blower fan (8).
4, intelligent wind pressure detecting device according to claim 3 is characterized in that above-mentioned switching tube Q1 is big electric current PNP power tube or P type field effect transistor.
5, intelligent wind pressure detecting device according to claim 1, it is characterized in that above-mentioned voltage sample circuit (4) includes voltage sampling resistor R5, R6, voltage sampling resistor R5, the end of R6 is connected with blower fan (8), and the other end is connected with the voltage sample input port of single-chip microcomputer (1).
6, intelligent wind pressure detecting device according to claim 1 is characterized in that above-mentioned current sampling circuit (5) includes current sampling resistor R10, and current sampling resistor R10 is connected on blower fan (8).
7, intelligent wind pressure detecting device according to claim 1, it is characterized in that above-mentioned linear amplification and filtering circuit (6) include operational amplifier IC1A, IC1B, resistance R 7, R9, R15, R16, R18, R13, R14, capacitor C 3, C6, wherein the positive input terminal of operational amplifier IC1A is connected with current sampling resistor R10 by resistance R 7, resistance R 16 is connected and connects by resistance R 17 positive input terminal of IC1A with diode D3, diode D3 other end ground connection, the negative input end of operational amplifier IC1A respectively with resistance R 9, the end of R15 connects, the other end ground connection of resistance R 9, the output terminal of operational amplifier IC1A is by resistance R 13, capacitor C 6 is connected with the output terminal of operational amplifier IC1B and is connected with the current sample input port of single-chip microcomputer (1) by resistance R 18, the positive input terminal of operational amplifier IC1B is connected with an end of resistance R 14 and by capacitor C 3 ground connection, the other end of resistance R 14 respectively with resistance R 13, capacitor C 6 connects, and the output terminal of operational amplifier IC1B is connected with negative input end.
8, intelligent wind pressure detecting device according to claim 7 is characterized in that above-mentioned operational amplifier IC1A, IC1B are LM358.
9, intelligent wind pressure detecting device according to claim 1, it is characterized in that above-mentioned power circuit (7) includes bridge rectifier circuit DB1 and filter capacitor C1, the input end of bridge rectifier circuit DB1 is connected the two ends of power supply, and filter capacitor C1 is connected the output terminal of bridge rectifier circuit DB1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520062222 CN2811968Y (en) | 2005-08-02 | 2005-08-02 | Intelligent wind pressure detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520062222 CN2811968Y (en) | 2005-08-02 | 2005-08-02 | Intelligent wind pressure detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2811968Y true CN2811968Y (en) | 2006-08-30 |
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ID=36938358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520062222 Expired - Lifetime CN2811968Y (en) | 2005-08-02 | 2005-08-02 | Intelligent wind pressure detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2811968Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100498258C (en) * | 2005-08-02 | 2009-06-10 | 佛山市顺德区万和集团有限公司 | Intelligent wind pressure detecting device and its detecting method |
| CN102878096A (en) * | 2012-09-11 | 2013-01-16 | 广东华美骏达电器有限公司 | Fan automatic tracking control circuit |
| CN107070422A (en) * | 2015-09-11 | 2017-08-18 | Ess技术有限公司 | For the method and apparatus for the high output signal amplitude of oscillation for realizing class-D amplifier |
| CN109340887A (en) * | 2018-09-25 | 2019-02-15 | 广州迪森家居环境技术有限公司 | Gas wall-hung boiler control method, device, control equipment and gas wall-hung boiler |
| US10746186B2 (en) | 2017-08-04 | 2020-08-18 | Lennox Industries Inc. | HVAC blower protection |
-
2005
- 2005-08-02 CN CN 200520062222 patent/CN2811968Y/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100498258C (en) * | 2005-08-02 | 2009-06-10 | 佛山市顺德区万和集团有限公司 | Intelligent wind pressure detecting device and its detecting method |
| CN102878096A (en) * | 2012-09-11 | 2013-01-16 | 广东华美骏达电器有限公司 | Fan automatic tracking control circuit |
| CN107070422A (en) * | 2015-09-11 | 2017-08-18 | Ess技术有限公司 | For the method and apparatus for the high output signal amplitude of oscillation for realizing class-D amplifier |
| CN107070423A (en) * | 2015-09-11 | 2017-08-18 | Ess技术有限公司 | For the method and apparatus for the high output signal amplitude of oscillation for realizing D class A amplifier As |
| CN107070422B (en) * | 2015-09-11 | 2021-07-27 | Ess技术有限公司 | Method and apparatus for achieving high output signal swing for class D amplifiers |
| CN107070423B (en) * | 2015-09-11 | 2021-10-08 | Ess技术有限公司 | Method and apparatus for achieving high output signal swing for class D amplifiers |
| US10746186B2 (en) | 2017-08-04 | 2020-08-18 | Lennox Industries Inc. | HVAC blower protection |
| EP3438560B1 (en) * | 2017-08-04 | 2020-10-07 | Lennox Industries Inc. | Hvac blower protection |
| CN109340887A (en) * | 2018-09-25 | 2019-02-15 | 广州迪森家居环境技术有限公司 | Gas wall-hung boiler control method, device, control equipment and gas wall-hung boiler |
| CN109340887B (en) * | 2018-09-25 | 2021-05-07 | 广州迪森家居环境技术有限公司 | Gas wall-hung boiler control method, device, control equipment and gas wall-hung boiler |
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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 |
Effective date of abandoning: 20090610 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |