CN207795623U - A kind of electric fan fault alarm - Google Patents
A kind of electric fan fault alarm Download PDFInfo
- Publication number
- CN207795623U CN207795623U CN201721789658.0U CN201721789658U CN207795623U CN 207795623 U CN207795623 U CN 207795623U CN 201721789658 U CN201721789658 U CN 201721789658U CN 207795623 U CN207795623 U CN 207795623U
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- Prior art keywords
- resistance
- electric fan
- capacitance
- pulse signal
- integrated circuit
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Abstract
The utility model discloses a kind of electric fan fault alarms, 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；When retation speed of electric fan failure, the tachometer pulse signal TS is low level by Integrated circuit IC output, then the buzzer warning.The utility model is by detecting the tachometer pulse signal TS from retation speed of electric fan, and buzzer will send out alarm when realizing retation speed of electric fan failure；It has both saved in this way the time, has also reduced human cost, improved work efficiency.
Description
Technical field
The utility model is related to arrive 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 working properly
Performance can stablize.But the working condition for inspecting periodically electric fan is a cumbersome job, has both spent time manpower,
Working efficiency is influenced again.
Therefore, the prior art is defective, needs to improve.
Utility model content
The utility model provides a kind of electric fan fault alarm, the above problem of solution.
To solve the above problems, the technical scheme that the utility model is provided 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
When rotating speed failure, the tachometer pulse signal TS is low level by Integrated circuit IC output, then the buzzer warning.
Preferred 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.
Preferred technical solution can select by adjusting the parameter of the capacitance C2, resistance R4, resistance R5, resistance R6
When retation speed of electric fan drops to threshold value or less, the buzzer BP will alarm.
Preferred technical solution, the power supply VCC are DC12V.
The anode of preferred technical solution, the capacitance C3 is connect with the power supply VCC；The cathode of the capacitance C3 connects
Ground；The capacitance C3 is that the power supply VCC plays voltage regulation filtering.
Advantageous effect compared with the existing technology is that using the above scheme, the utility model comes from electric fan by detection
The tachometer pulse signal TS of rotating speed, buzzer will send out alarm when realizing retation speed of electric fan failure；The time has both been saved in this way,
Also human cost is reduced, is improved work efficiency.
Description of the drawings
Illustrate embodiment or technical solution in the prior art in order to clearer, it below will be to embodiment or the prior art
The required attached drawing used is briefly described in description, it is clear that, the accompanying drawings in the following description is only the one of utility model
A little embodiments for those of ordinary skill in the art without creative efforts, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is a kind of electric fan fault alarm circuit diagram of the utility model.
Specific implementation mode
For the ease of understanding the utility model, in the following with reference to the drawings and specific embodiments, the utility model is carried out more detailed
Thin explanation.The preferred embodiment of the utility model is given in attached drawing.But the utility model can be with many different
Form is realized, however it is not limited to this specification described embodiment.Make to this on the contrary, purpose of providing these embodiments is
The understanding of the disclosure of utility model is 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 elements 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 ", " integrated molding ",
For illustrative purposes only, the similar unit of structure is to identical label in the figure for "left", "right" and similar statement
Mark.
Unless otherwise defined, technical and scientific term all used in this specification and the skill for belonging to the utility model
The normally understood meaning of technical staff in art field is identical.Art used in the description of the utility model in this specification
Language, which is only for the purpose of describing specific embodiments, is not intended to limitation the utility model.
As shown in Figure 1, one embodiment of the utility model 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
When rotating speed failure, the tachometer pulse signal TS is low level by Integrated circuit IC output, then the buzzer warning.
Preferred 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.
Preferred technical solution can select by adjusting the parameter of the capacitance C2, resistance R4, resistance R5, resistance R6
When retation speed of electric fan drops to threshold value or less, the buzzer BP will alarm.
Preferred technical solution, the power supply VCC are DC12V.
The anode of preferred technical solution, the capacitance C3 is connect with the power supply VCC；The cathode of the capacitance C3 connects
Ground；The capacitance C3 is that the power supply VCC plays voltage regulation filtering.
Preferred technical solution, the Integrated circuit IC are comparator LM393.
The operation principle of the utility model is：
The utility model is the electric fan for the heat dissipation of three-wire type DC instrument, and two lead-out wire of red and black of the electric fan is power supply
And ground wire, another single line (yellow or white) output is tachometer pulse signal.When electric fan works normally, inputted to circuit input end
The square-wave pulse of certain frequency.Electric fan each rotation exports two pulses.When low pulse arrives, capacitance C2 is through triode Q1
The poles eb and resistance R3 charge to capacitance C1, triode Q1 conducting quickly falls the charge discharging resisting of capacitance C2, Integrated circuit IC
Reverse phase terminal voltage V- is less than in-phase end voltage V+, then Integrated circuit IC exports high level, and buzzer BP is not cried.Power supply VCC simultaneously
It charges to capacitance C1 through resistance R2, triode Q1 ends quickly, and power supply VCC starts slowly to charge to capacitance C2 through resistance R4；When
When electric fan inputs upper jump pulse to circuit, capacitance C1 discharges through diode Dl, resistance R1, while triode Q1 keeps cut-off shape
State, resistance R4 continue slowly to charge to capacitance C2；When next low pulse arrives, triode Q1 is connected again, and by capacitance
Charge on C2 is quickly released, and circuit repeats above procedure.If the value of resistance R4 and capacitance C2 are proper so that low at two
In time interval between pulse, V- is kept<The output of V+, Integrated circuit IC will remain that high level, buzzer BP are not named.
Through calculating, resistance R4 charges to capacitance C2 so that the time of V-=V+ is：If VCC=12V, by the value of component parameters in circuit
It calculates, T=0.1456 seconds, the rotating speed of corresponding electric fan is 206 revs/min.Therefore, if the rotating speed of electric fan higher than 206 turns/
Point, buzzer BP does not cry holding, and circuit does not alert.If electric fan stalls, what electric fan was inputted to circuit is to continue high electricity
Flat (or low level) crosses 0.1456 second time delay, the reverse phase terminal voltage V- of Integrated circuit IC is higher than after triode Q1 cut-offs
In-phase end voltage V+, Integrated circuit IC export low level, and power supply VCC powers through resistance R7 to buzzer BP, and buzzer BP continues
Toot cry, carry out stalling alarm.
Another embodiment of the utility model：
With the difference of first embodiment：The utility model can give other circuits to provide TTL alarm signals：By buzzer BP
Remove, resistance R7 is connected to the output end of Integrated circuit IC.Output OUT TTL be：OUT is high level, electricity when electric fan is normal
OUT is low level when fan stalls, 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 combined with each other, the various embodiments not being enumerated above are formed,
It is accordingly to be regarded as the range of the utility model specification record；Also, it for those of ordinary skills, can be according to above stating
It is bright to be improved or converted, and all these modifications and variations should all belong to the protection model of the appended claims for the utility model
It encloses.
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
It hinders R6, resistance R7, capacitance C1, capacitance C2, capacitance C3, diode D1, triode Q1, Integrated circuit IC, buzzer BP and tests the speed
Pulse signal TS；It is characterized in that, the tachometer pulse signal TS is square-wave pulse, it is derived from three-wire type DC electric fans；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；When 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, which is characterized 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, which is characterized in that by adjusting the capacitance C2, resistance
The parameter of R4, resistance R5, resistance R6, when retation speed of electric fan can be selected to drop to threshold value or less, the buzzer BP will alarm.
4. electric fan fault alarm according to claim 1, which is characterized in that the power supply VCC is DC12V.
5. electric fan fault alarm according to claim 1, which is characterized in that anode and the electricity of the capacitance C3
Source VCC connections；The cathode of the capacitance C3 is grounded；The capacitance C3 is that the power supply VCC plays voltage regulation filtering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721789658.0U CN207795623U (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 |
|---|---|---|---|
| CN201721789658.0U CN207795623U (en) | 2017-12-20 | 2017-12-20 | A kind of electric fan fault alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207795623U true CN207795623U (en) | 2018-08-31 |
Family
ID=63281268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721789658.0U Expired - Fee Related CN207795623U (en) | 2017-12-20 | 2017-12-20 | A kind of electric fan fault alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207795623U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113109597A (en) * | 2021-05-12 | 2021-07-13 | 广东电网有限责任公司 | Automatic 10kV circuit breaker short-circuit connection device for alternating-current voltage withstand test of reporting to police |
-
2017
- 2017-12-20 CN CN201721789658.0U patent/CN207795623U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113109597A (en) * | 2021-05-12 | 2021-07-13 | 广东电网有限责任公司 | Automatic 10kV circuit breaker short-circuit connection device for alternating-current voltage withstand test of reporting to police |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180831 Termination date: 20191220 |