CN108035895A - A kind of electric fan fault alarm - Google Patents
A kind of electric fan fault alarm Download PDFInfo
- Publication number
- CN108035895A CN108035895A CN201711382220.5A CN201711382220A CN108035895A CN 108035895 A CN108035895 A CN 108035895A CN 201711382220 A CN201711382220 A CN 201711382220A CN 108035895 A CN108035895 A CN 108035895A
- Authority
- CN
- China
- Prior art keywords
- resistance
- electric fan
- capacitance
- pulse signal
- integrated circuit
- 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
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/008—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/002—Details, component parts, or accessories especially adapted for elastic fluid pumps
Abstract
The invention discloses a kind of electric fan fault alarm, including power supply VCC, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, capacitance C1, capacitance C2, capacitance C3, diode D1, triode Q1, Integrated circuit IC, buzzer BP and tachometer pulse signal TS；The tachometer pulse signal TS is square-wave pulse, is derived from three-wire type DC electric fans；When retation speed of electric fan is normal, the tachometer pulse signal TS is high level by Integrated circuit IC output, then the buzzer is not alarmed；During retation speed of electric fan failure, the tachometer pulse signal TS is low level by Integrated circuit IC output, then the buzzer warning.The present invention is by detecting the tachometer pulse signal TS from retation speed of electric fan, and buzzer will send alarm when realizing retation speed of electric fan failure；So both save the time, also reduced human cost, improved work efficiency.
Description
Technical field
The present invention relates to electric fan field, more particularly to a kind of electric fan fault alarm.
Background technology
For the case radiation electric fan of long continuous operation equipment, continuous work equipment is related to whether its is working properly
Performance can stablize.But the working status for inspecting periodically electric fan is a cumbersome job, has both spent time manpower,
Work efficiency is influenced again.
Therefore, the prior art is defective, it is necessary to improve.
The content of the invention
The present invention provides a kind of electric fan fault alarm, the above problem of solution.
To solve the above problems, technical solution provided by the invention is as follows：
A kind of electric fan fault alarm, including power supply VCC, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5,
Resistance R6, resistance R7, capacitance C1, capacitance C2, capacitance C3, diode D1, triode Q1, Integrated circuit IC, buzzer BP and survey
Fast pulse signal TS；The tachometer pulse signal TS is square-wave pulse, is derived from three-wire type DC electric fans；Retation speed of electric fan is normal
When, the tachometer pulse signal TS is high level by Integrated circuit IC output, then the buzzer is not alarmed；Electric fan
During rotating speed failure, the tachometer pulse signal TS is low level by Integrated circuit IC output, then the buzzer warning.
Preferable technical solution, by adjusting the parameter of the capacitance C2, resistance R4 so that the tachometer pulse signal TS
In time interval between two low pulses, the reverse inter-input-ing voltage of the Integrated circuit IC is kept to be less than homophase input electricity
Pressure, the output of the Integrated circuit IC will remain high level, the buzzer BP silences.
Preferable technical solution, by adjusting the capacitance C2, resistance R4, resistance R5, resistance R6 parameter, can select
When retation speed of electric fan is dropped to below threshold value, the buzzer BP will alarm.
Preferable technical solution, the power supply VCC are DC12V.
Preferable technical solution, the cathode of the capacitance C3 are connected with the power supply VCC；The anode of the capacitance C3 connects
Ground；The capacitance C3 plays voltage regulation filtering for the power supply VCC.
It is that using the above scheme, the present invention comes from retation speed of electric fan by detection relative to the beneficial effect of the prior art
Tachometer pulse signal TS, buzzer will send alarm when realizing retation speed of electric fan failure；So both save the time, also dropped
Low human cost, improves work efficiency.
Brief description of the drawings
, below will be to embodiment or the prior art for clearer explanation embodiment or technical solution of the prior art
The required attached drawing used is briefly described in description, it is clear that, drawings in the following description are only some realities invented
Example is applied, for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of electric fan fault alarm circuit diagram of the present invention.
Embodiment
For the ease of understanding the present invention, below in conjunction with the accompanying drawings and specific embodiment, the utility model is carried out more detailed
Explanation.The preferred embodiment of the present invention is given in attached drawing.But the present invention can realize in many different forms,
It is not limited to this specification described embodiment.On the contrary, the purpose for providing these embodiments makes to the utility model
The understanding of disclosure more thorough and comprehensive.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element
Or there may also be element placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.Term used in this specification " fixation ", " being integrally formed ",
For illustrative purposes only, in figure, the similar unit of structure is to identical label for "left", "right" and similar statement
Sign.
Unless otherwise defined, technical and scientific term all used in this specification is led with belonging to the technology of the present invention
The normally understood implication of technical staff in domain is identical.Used term is simply in the description of the invention in this specification
The purpose of description specific embodiment, is not intended to the limitation present invention.
As shown in Figure 1, one embodiment of the present of invention is：
A kind of electric fan fault alarm, including power supply VCC, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5,
Resistance R6, resistance R7, capacitance C1, capacitance C2, capacitance C3, diode D1, triode Q1, Integrated circuit IC, buzzer BP and survey
Fast pulse signal TS；The tachometer pulse signal TS is square-wave pulse, is derived from three-wire type DC electric fans；Retation speed of electric fan is normal
When, the tachometer pulse signal TS is high level by Integrated circuit IC output, then the buzzer is not alarmed；Electric fan
During rotating speed failure, the tachometer pulse signal TS is low level by Integrated circuit IC output, then the buzzer warning.
Preferable technical solution, by adjusting the parameter of the capacitance C2, resistance R4 so that the tachometer pulse signal TS
In time interval between two low pulses, the reverse inter-input-ing voltage of the Integrated circuit IC is kept to be less than homophase input electricity
Pressure, the output of the Integrated circuit IC will remain high level, the buzzer BP silences.
Preferable technical solution, by adjusting the capacitance C2, resistance R4, resistance R5, resistance R6 parameter, can select
When retation speed of electric fan is dropped to below threshold value, the buzzer BP will alarm.
Preferable technical solution, the power supply VCC are DC12V.
Preferable technical solution, the cathode of the capacitance C3 are connected with the power supply VCC；The anode of the capacitance C3 connects
Ground；The capacitance C3 plays voltage regulation filtering for the power supply VCC.
Preferable technical solution, the Integrated circuit IC are comparator LM393.
The present invention operation principle be：
The present invention be directed to the electric fan of three-wire type DC instrument heat dissipation, two lead-out wire of red and black of the electric fan is power supply and ground
Line, another (the yellow or white) output of single line is tachometer pulse signal.When electric fan works normally, inputted to circuit input end certain
The square-wave pulse of frequency.Electric fan each rotation exports two pulses.When low pulse arrives, capacitance C2 is through triode Q1's
Eb poles and resistance R3 charge to capacitance C1, and triode Q1 conductings, quickly fall the charge discharging resisting of capacitance C2, Integrated circuit IC
Anti-phase terminal voltage V- is less than in-phase end voltage V+, then Integrated circuit IC output high level, buzzer BP are not cried.Power supply VCC at the same time
Charge through resistance R2 to capacitance C1, triode Q1 ends quickly, and power supply VCC starts slowly to charge to capacitance C2 through resistance R4；When
Electric fan to circuit input upper jump pulse when, capacitance C1 discharges through diode Dl, resistance R1, while triode Q1 keeps cut-off
State, resistance R4 continue slowly to charge to capacitance C2；When next low pulse arrives, triode Q1 is turned on again, and by electricity
The electric charge held on C2 is quickly released, and circuit repeats above procedure.If the value of resistance R4 and capacitance C2 are proper so that at two
In time interval between low pulse, V- is kept<V+, the output of Integrated circuit IC will remain high level, and buzzer BP is not
Cry.Through calculating, resistance R4 charges to capacitance C2 so that the time of V-=V+ is：If VCC=12V, by component parameters in circuit
Exploitation, T=0.1456 seconds, the rotating speed of corresponding electric fan was 206 revs/min.Therefore, as long as the rotating speed of electric fan is higher than 206
Rev/min, buzzer BP will keep not crying, and circuit does not alert.If electric fan stalls, electric fan to circuit input be continue it is high
Level (or low level), after triode Q1 ends, crosses the time delay of 0.1456 second, the anti-phase terminal voltage V- of Integrated circuit IC
Higher than in-phase end voltage V+, Integrated circuit IC output low level, power supply VCC powers through resistance R7 to buzzer BP, buzzer BP
Continue toot cry, carry out stalling alarm.
An alternative embodiment of the invention：
With the difference of first embodiment：The present invention can give other circuits to provide TTL alarm signals：Buzzer BP is gone
Fall, resistance R7 is connected to the output terminal of Integrated circuit IC.Output OUT TTL be：OUT is high level when electric fan is normal, electric wind
OUT is low level during fan stalling, and OUT is pulse signal when retation speed of electric fan is too low.
It should be noted that above-mentioned each technical characteristic continues to be mutually combined, the various embodiments not being enumerated above are formed,
It is accordingly to be regarded as the scope of description of the invention record；Also, for those of ordinary skills, it can add according to the above description
To improve or convert, and all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (5)
1. a kind of electric fan fault alarm, including power supply VCC, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, electricity
Hinder R6, resistance R7, capacitance C1, capacitance C2, capacitance C3, diode D1, triode Q1, Integrated circuit IC, buzzer BP and test the speed
Pulse signal TS；It is characterized in that, the tachometer pulse signal TS is square-wave pulse, three-wire type DC electric fans are derived from；Electric fan
When rotating speed is normal, the tachometer pulse signal TS is high level by Integrated circuit IC output, then the buzzer is not reported
It is alert；During retation speed of electric fan failure, the tachometer pulse signal TS is low level by Integrated circuit IC output, then the bee
The device that rings is alarmed.
2. electric fan fault alarm according to claim 1, it is characterised in that by adjusting the capacitance C2, resistance
The parameter of R4 so that the tachometer pulse signal TS keeps the integrated circuit in the time interval between two low pulses
The reverse inter-input-ing voltage of IC is less than homophase input voltage, and the output of the Integrated circuit IC will remain high level, the bee
Ring device BP silences.
3. electric fan fault alarm according to claim 1, it is characterised in that by adjusting the capacitance C2, resistance
R4, resistance R5, the parameter of resistance R6, when can select the retation speed of electric fan to drop to below threshold value, the buzzer BP will alarm.
4. electric fan fault alarm according to claim 1, it is characterised in that the power supply VCC is DC12V.
5. electric fan fault alarm according to claim 1, it is characterised in that the cathode of the capacitance C3 and the electricity
Source VCC connections；The anode ground connection of the capacitance C3；The capacitance C3 plays voltage regulation filtering for the power supply VCC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711382220.5A CN108035895A (en) | 2017-12-20 | 2017-12-20 | A kind of electric fan fault alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711382220.5A CN108035895A (en) | 2017-12-20 | 2017-12-20 | A kind of electric fan fault alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108035895A true CN108035895A (en) | 2018-05-15 |
Family
ID=62099997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711382220.5A Pending CN108035895A (en) | 2017-12-20 | 2017-12-20 | A kind of electric fan fault alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108035895A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109236697A (en) * | 2018-10-29 | 2019-01-18 | 安徽四创电子股份有限公司 | A kind of blower fan control system |
| CN112780591A (en) * | 2021-02-25 | 2021-05-11 | 深圳市科元电气技术有限公司 | Fan control and protection circuit and control method of fan protection circuit |
-
2017
- 2017-12-20 CN CN201711382220.5A patent/CN108035895A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109236697A (en) * | 2018-10-29 | 2019-01-18 | 安徽四创电子股份有限公司 | A kind of blower fan control system |
| CN112780591A (en) * | 2021-02-25 | 2021-05-11 | 深圳市科元电气技术有限公司 | Fan control and protection circuit and control method of fan protection circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180515 |