CN104240413A - Cooling fan system alarm circuit - Google Patents
Cooling fan system alarm circuit Download PDFInfo
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- CN104240413A CN104240413A CN201310259958.8A CN201310259958A CN104240413A CN 104240413 A CN104240413 A CN 104240413A CN 201310259958 A CN201310259958 A CN 201310259958A CN 104240413 A CN104240413 A CN 104240413A
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- reed relay
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Abstract
Disclosed is a cooling fan system alarm circuit. The cooling fan system alarm circuit is used for achieving alarming through an alarm lamp and an alarm sound when a fan stops rotating and relevant temperature is too high. The cooling fan system alarm circuit comprises an alarm signal isolation and amplification device, a dry reed relay and a sound-light alarm circuit. After being integrated into one path, a fan rotating-stop signal and an over-temperature alarm signal are isolated by an optocoupler and output, and then drive an NPN triode to be amplified, meanwhile, a coil of the dry reed relay is switched on to enable a normally open switch of the dry reed relay to be closed, then the sound-light alarm circuit is connected, so that a light emitting diode emits alarm light and a sound generator generates a sound after current flows through. According to the cooling fan system alarm circuit, the two kinds of alarm signals are integrated, dual alarming is carried out, the circuit is achieved through pure hardware, the structure is simple, and reliability is high.
Description
Technical field
The present invention relates to the radiator fan field of electrical equipment, be specifically related to the dual-alarm Circuits System of temperature excess temperature in a kind of fan stall and heat dissipation environment.
Background technology
Building and plant power supply and distribution equipment, long playing household electrical appliance etc., need the operation keeping the permanent time, higher to the requirement of radiating fan system, therefore also usually for radiating fan system, some warning devices are installed, but majority is the warning device of simple target, as the stppage alarm device of fan.
Along with global warming; environment temperature uprises; in addition during the broiling summer; cooling system often there will be because of extraneous thermal effect to fan self-temperature or the transfiniting of object temperature and breaking down of dispelling the heat; so to fan self-temperature or the more and more necessary work be detected as visual plant of dispel the heat object temperature or environment temperature, also just existence necessity that temperature over-range is reported to the police naturally.
Summary of the invention
Based on above trend, and the needs that radiating fan system complete detection is also reported to the police, consideration structure is simple, reliable simultaneously, and the present invention takes into account fan stall and relevant device excess temperature with regard to proposing one, and can pass through the Circuits System of light and audible alarm simultaneously.
Main technical schemes of the present invention is:
A kind of radiating fan system warning circuit, in fan stall, and realizes reporting to the police by alarm lamp and alarm sound during associated temperature excess temperature, comprises alerting signal isolation and amplify, dry-reed relay switch and sound light alarming circuit.After fan stall signal and overtemperature alarm signal first synthesize a road, through light-coupled isolation, export rear drive NPN triode to amplify, connected the coil of dry-reed relay simultaneously, dry-reed relay switch is impelled to close, and then connected sound light alarming circuit, namely light emitting diode and acoustical generator current-sharing excess current send warning light and sound.
Fan stall signal and overtemperature alarm signal respectively through filtering, and are combined into a road after being connected in series a diode separately again.After optocoupler, optocoupler output signal connects the base stage of NPN triode.
Dry-reed relay and sound light alarming circuit driving power must through filtering and voltage stabilizing measures, and dry-reed relay coil outer parallel resistance, then connects with the collector and emitter of NPN triode.
Sound light alarming circuit is made up of light emitting diode, acoustical generator, adjustable resistance, light emitting diode and ground connection in parallel with acoustical generator again after connecting with adjustable resistance, the other end is connected with dry-reed relay switch, dry-reed relay switch one termination primary power, adjustable resistance is adjusted to suitable value according to the electric current of the two-way of the parallel connection of reality and device parameters.
The power supply and the aforementioned power supply flowing through dry-reed relay switch and sound light alarming circuit that flow through dry-reed relay coil and NPN triode collection emitter-base bandgap grading are all a primary power.Optocoupler power supply is the low-tension supply of relative primary power.But all power, containing the two-way alerting signal source of input, their ground wire finally will be unified to be shorted together.
Technique effect of the present invention mainly contains: this alarm circuit system is integrated with fan stall and temperature over-range two problems are reported to the police, and the same alarm of sound, light, compare two cover warning systems and provide cost savings and volume.Meanwhile, this alarm circuit system is pure hardware controls, and circuit structure is also simple.
In order to have higher alarm sound and illumination to allow people learn accurately, need larger electric current, the present invention utilizes optocoupler to realize the isolation of signal stream and alarm current, and reliability significantly improves.
Accompanying drawing explanation
Figure 1 shows that warning circuit structural drawing of the present invention.
Wherein: 1: fan stall signal, 2: overtemperature alarm signal, 3: dry-reed relay, 4: sound light alarming circuit, C1, C2: electric capacity, D1, D2, D4: diode, D3: voltage stabilizing diode, D5: light emitting diode, C3: electrochemical capacitor, U1: optocoupler, R1, R2: resistance, R3: adjustable resistance, Q1: triode, HA: acoustical generator, VCC1, VCC2: direct supply.
Embodiment
As shown in drawings, fan stall signal (1) and overtemperature alarm signal (2) are separately respectively through electric capacity C1 and electric capacity C2 filtering, then series diode D1 and diode D2 on branch road separately, then unite two into one and as the input of optocoupler U1; Diode D1 and diode D2 Main Function produce for preventing the circulation between fan stall signal (1) and overtemperature alarm signal (2).Fan stall signal (1) and overtemperature alarm signal (2), when there is fan stall and excess temperature, are high level, on the contrary the low level of being.Consider that the original signal line of such as brshless DC motor fan exports as square wave, before this warning circuit of introducing, need the logic synthesis carrying out signal, namely low level is normal, and high level is stall; For excess temperature signal, be also need the overtemperature alarm signal (2) after into excess temperature of adjusting to be high level, otherwise be low level.
Optocoupler U1 adopts the linearity good TIL113, the direct supply VCC1 of optocoupler U1 be+5V, VCC1 elder generation after resistance R1 through optocoupler U1 in the base stage exporting to NPN triode Q1, NPN triode Q1 chooses BCX19; Resistance R1 shields.
Main dc power supply VCC2 is taken as+24V, and first after filtering and voltage stabilizing, filter capacitor C3 is 4.7 μ 35V, voltage stabilizing diode D3 is+24V voltage stabilizing; The desirable 10k Ω of value of resistance R2, otherwise the too small electric current making to flow through in dry-reed relay (3) coil is too low, simultaneously because also for the fault offset of dry-reed relay (3) coil provides loop, so resistance is also unsuitable excessive; The existence acting as dry-reed relay (3) coil preventing from being connected with it of diode D4 and issuable back flow current.
Model chosen by dry-reed relay (3) is DIP24-1C90, and during its work, Inside coil voltage request is+24V, so main dc power supply VCC2 is+24V.After having input alerting signal to make the conducting of NPN triode Q1 collector and emitter, the inner right side normal open switch of the magnetic field suction dry-reed relay (3) that the electric current produced in dry-reed relay (3) coil is set up closes, thus the main dc power supply VCC2 on the upside of it is communicated with sound light alarming circuit (4).
Sound light alarming circuit (4) is started working after the normal open switch of dry-reed relay (3) is closed, and light emitting diode D5 connects with adjustable resistance R3, then in parallel with acoustical generator HA together, and common ground.Adjustable resistance R3 adopts power resistor, and size is determined according to the current conditions of other two elements in sound light alarming circuit (4).
Claims (4)
1. a radiating fan system warning circuit, in fan stall, and realizes reporting to the police by alarm lamp and alarm sound during associated temperature excess temperature, and it comprises alerting signal isolation and amplifies, dry-reed relay and sound light alarming circuit.After fan stall signal and overtemperature alarm signal first synthesize a road, through light-coupled isolation, export rear drive NPN triode to amplify, connected the coil of dry-reed relay simultaneously, the magnetic field that the coil of dry-reed relay is set up under direct supply effect impels dry-reed relay normal open switch to close, and then connected sound light alarming circuit, make light emitting diode and acoustical generator current-sharing excess current send warning light and sound.
2. radiating fan system warning circuit as claimed in claim 1, it is characterized in that: described fan stall signal and overtemperature alarm signal are respectively through filtering, and be combined into a road again after being connected in series a diode separately, after optocoupler, optocoupler output signal connects the base stage of NPN triode.
3. radiating fan system warning circuit as claimed in claim 1, it is characterized in that: described dry-reed relay and sound light alarming circuit driving power must through filtering and voltage stabilizing measures, dry-reed relay coil outer parallel resistance, then connects with the collector and emitter of NPN triode.
4. radiating fan system warning circuit as claimed in claim 1, it is characterized in that: described sound light alarming circuit is made up of light emitting diode, acoustical generator, adjustable resistance, light emitting diode and ground connection in parallel with acoustical generator again after connecting with adjustable resistance, the other end is connected with dry-reed relay switch, another termination direct supply of dry-reed relay switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310259958.8A CN104240413A (en) | 2013-06-24 | 2013-06-24 | Cooling fan system alarm circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310259958.8A CN104240413A (en) | 2013-06-24 | 2013-06-24 | Cooling fan system alarm circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104240413A true CN104240413A (en) | 2014-12-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310259958.8A Pending CN104240413A (en) | 2013-06-24 | 2013-06-24 | Cooling fan system alarm circuit |
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| Country | Link |
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| CN (1) | CN104240413A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201027684Y (en) * | 2007-01-31 | 2008-02-27 | 孙武源 | Intelligent warning system of fan |
| CN201185007Y (en) * | 2008-04-15 | 2009-01-21 | 东莞市金翔电器设备有限公司 | Control circuit for radiating fan of computer power supplier |
| US20100047082A1 (en) * | 2006-02-24 | 2010-02-25 | Delta Electronics, Inc. | Fan system and detector thereof |
| CN201569107U (en) * | 2009-10-23 | 2010-09-01 | 广东美的电器股份有限公司 | Relay output circuit with function of isolation for central air conditioning controller |
| CN201932118U (en) * | 2011-01-20 | 2011-08-17 | 高顺强 | Automobile anti-theft positioning and monitoring device |
| CN202883417U (en) * | 2012-06-14 | 2013-04-17 | 广东粤林电气科技股份有限公司 | Cooling fan fault alarm circuit structure |
-
2013
- 2013-06-24 CN CN201310259958.8A patent/CN104240413A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100047082A1 (en) * | 2006-02-24 | 2010-02-25 | Delta Electronics, Inc. | Fan system and detector thereof |
| CN201027684Y (en) * | 2007-01-31 | 2008-02-27 | 孙武源 | Intelligent warning system of fan |
| CN201185007Y (en) * | 2008-04-15 | 2009-01-21 | 东莞市金翔电器设备有限公司 | Control circuit for radiating fan of computer power supplier |
| CN201569107U (en) * | 2009-10-23 | 2010-09-01 | 广东美的电器股份有限公司 | Relay output circuit with function of isolation for central air conditioning controller |
| CN201932118U (en) * | 2011-01-20 | 2011-08-17 | 高顺强 | Automobile anti-theft positioning and monitoring device |
| CN202883417U (en) * | 2012-06-14 | 2013-04-17 | 广东粤林电气科技股份有限公司 | Cooling fan fault alarm circuit structure |
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Application publication date: 20141224 |