CN205841284U - Fan control and testing circuit - Google Patents
Fan control and testing circuit Download PDFInfo
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- CN205841284U CN205841284U CN201620618807.6U CN201620618807U CN205841284U CN 205841284 U CN205841284 U CN 205841284U CN 201620618807 U CN201620618807 U CN 201620618807U CN 205841284 U CN205841284 U CN 205841284U
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- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The utility model discloses a kind of fan control and testing circuit, comprising: fan drive circuit part, fan failure testing circuit part；Fan drive circuit part includes: the terminal CN2 that is connected to fan, the driving audion Q1 being connected to terminal CN2; terminal CN2 is connected to storage capacitor D1; the emitter stage driving audion Q1 is connected to fan failure testing circuit part; the base stage driving audion Q1 is connected to control chip, is connected to protective resistance R2 of one end ground connection between current-limiting resistance R1 and the base stage driving audion Q1；Fan failure testing circuit part includes: be connected to the current-limiting resistance R3 of control chip; current-limiting resistance R3 is connected to resistance combination device; the other end of resistance combination device is connected to the earth terminal of protective resistance R2; the control chip connection of current-limiting resistance R3 is terminated with filter capacitor C1, and the filter capacitor C1 other end is connected to the earth terminal of resistance combination device.This product drives the AD value of audion one end to judge fan failure situation by detection, and circuit structure is simple, and detection mode is easily carried out.
Description
Technical field
This utility model relates to fan art, especially relates to a kind of fan control and testing circuit.
Background technology
Heat radiation is very important for existing electrical equipment, and long term high temperature can damage components and parts and cause the electrical equipment can not be normal
Work, most radiating mode, for installing fan auxiliary heat dissipation, accelerates air circulation and takes away heat and dispel the heat, easy and have
Effect, so fan cooling mode is extremely important, but the fault detect of fan is not accurate enough, it is impossible to accurately judge that the fault of fan
Situation.
Utility model content
The purpose of this utility model is to provide a kind of fan control and testing circuit, and it can judge fan event accurately
Barrier situation, and circuit structure is succinct, detection mode is simple.
For solving above-mentioned technical problem, embodiment of the present utility model provides a kind of fan control and testing circuit,
Comprising: fan drive circuit part and be connected to the fan failure testing circuit part of fan drive circuit part；Fan drives
Dynamic circuit part includes: the terminal CN2 that is connected to fan, the driving audion Q1, terminal CN2 being connected to terminal CN2 are connected to electric power storage electricity
Hold D1, drive the emitter stage of audion Q1 to be connected to fan failure testing circuit part, drive the base stage of audion Q1 to pass through current limliting
Resistance R1 and be connected to control chip, current-limiting resistance R1 and drive audion Q1 base stage between be connected to other end ground connection protection electricity
Resistance R2；Fan failure testing circuit part includes: be connected to the current-limiting resistance R3 of control chip, and current-limiting resistance R3 is connected to resistance combination
Device, the other end of this resistance combination device is connected to the earth terminal of protective resistance R2, and the control chip of current-limiting resistance R3 connects end
Being connected to filter capacitor C1, the filter capacitor C1 other end is connected to the earth terminal of resistance combination device.
Compared with prior art, the fan control that embodiment of the present utility model is provided can be passed through with testing circuit
Detection drives the AD value of audion one end to judge fan failure situation, and circuit structure is simple, and detection mode is easily carried out.
Further, the resistance that resistance combination device is made up of multiple parallel connections is constituted.
Further, the parallel resistance of resistance combination device is three.
Accompanying drawing explanation
Fig. 1 is fan control and testing circuit figure.
Detailed description of the invention
For the technological means making this utility model realize, creation characteristic, reach purpose and be easy to understand with effect, under
Face in conjunction with specific embodiments, is expanded on further this utility model.
As it is shown in figure 1, a kind of fan control and testing circuit, comprising: for the fans drive electricity driving fan work
Road part 1 and be connected to fan drive circuit part 1 and for detect fan failure situation and magnitude of voltage is changed AD value transmit
The fan failure testing circuit part 2 processed is carried out to chip.Fan drive circuit part 1 includes: be connected to the terminal of fan
CN2, being connected to the driving audion Q1 of terminal CN2, when driving triode ON, fan normally works, and terminal CN2 is connected to electric power storage electricity
Hold D1, drive the emitter stage of audion Q1 to be connected to fan failure testing circuit part 2, drive the base stage of audion Q1 to pass through current limliting
Resistance R1 and be connected to control chip, current-limiting resistance R1 and drive audion Q1 base stage between be connected to other end ground connection protection electricity
Resistance R2；Fan failure testing circuit part 2 includes: be connected to the current-limiting resistance R3 of control chip, and current-limiting resistance R3 is connected to resistor group
Locking device, the other end of this resistance combination device is connected to the earth terminal of protective resistance R2, and the control chip of current-limiting resistance R3 connects
Being terminated with filter capacitor C1, the filter capacitor C1 other end is connected to the earth terminal of resistance combination device.
From the discussion above it is seen that, in the fan control that embodiment of the present utility model is provided and testing circuit,
Fan failure testing circuit part 2 is connected by driving audion Q1 one end to detect mouth with the AD of microcontroller, and this terminal voltage turns
Change AD value judge fan failure situation and will it be processed, when fan occurs that open circuit or stall etc. are abnormal, electricity
Stream is relatively big, and resistance both end voltage can increase, and different abnormal conditions corresponding A D values change and to stablize AD value different, according to this change
Change and AD value difference is different can accurately judge fan abnormal conditions.
It is noted that the resistance that the resistance combination device of fan failure testing circuit part 2 is made up of multiple parallel connections
Constitute, the resistance combination device that three resistance R4, R5, R6 parallel connections of such as this case are constituted, it is possible to burn out when preventing electric current excessive
Need to detect the resistance of both end voltage, resistance is certain, and voltage is directly proportional to electric current, and when electric current increases, voltage increases, and fan is different
During failure condition, the resistor group to be checked electric current that closes is different, so can be according to the failure condition of the change-detection of electric current to fan, inspection
Survey result accuracy rate is high and speed is fast.
It will be understood by those skilled in the art that the respective embodiments described above are to realize of the present utility model being embodied as
Example, and in actual applications, can to it, various changes can be made in the form and details, without departing from spirit of the present utility model
And scope.
Claims (3)
1. fan control and testing circuit, it is characterised in that comprising: fan drive circuit part and be connected to fans drive electricity
The fan failure testing circuit part of road part；
Described fan drive circuit part includes: the terminal CN2 that is connected to fan, the driving audion Q1 being connected to terminal CN2, described
Terminal CN2 is connected to storage capacitor D1, and the emitter stage of described driving audion Q1 is connected to fan failure testing circuit part, drives three
The base stage of pole pipe Q1 is connected to control chip by current-limiting resistance R1, described current-limiting resistance R1 with drive audion Q1 base stage it
Between be connected to protective resistance R2 of other end ground connection；
Described fan failure testing circuit part includes: is connected to the current-limiting resistance R3 of control chip, described current-limiting resistance R3 and is connected to
Resistance combination device, the other end of this resistance combination device is connected to the earth terminal of protective resistance R2, the control of described current-limiting resistance R3
The connection of coremaking sheet is terminated with filter capacitor C1, and the described filter capacitor C1 other end is connected to the earth terminal of resistance combination device.
Fan control the most according to claim 1 and testing circuit, it is characterised in that described resistance combination device is by multiple
The resistance constituted in parallel is constituted.
Fan control the most according to claim 2 and testing circuit, it is characterised in that the parallel connection of described resistance combination device
Resistance is three.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620618807.6U CN205841284U (en) | 2016-06-20 | 2016-06-20 | Fan control and testing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620618807.6U CN205841284U (en) | 2016-06-20 | 2016-06-20 | Fan control and testing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205841284U true CN205841284U (en) | 2016-12-28 |
Family
ID=58153093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620618807.6U Active CN205841284U (en) | 2016-06-20 | 2016-06-20 | Fan control and testing circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205841284U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112493862A (en) * | 2019-08-26 | 2021-03-16 | 浙江苏泊尔家电制造有限公司 | Detection circuit of cooking appliance, cooking appliance and control method of cooking appliance |
-
2016
- 2016-06-20 CN CN201620618807.6U patent/CN205841284U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112493862A (en) * | 2019-08-26 | 2021-03-16 | 浙江苏泊尔家电制造有限公司 | Detection circuit of cooking appliance, cooking appliance and control method of cooking appliance |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180929 Address after: 273100 1 road four, industrial park, Qufu, Jining, Shandong Patentee after: Qufu Xin Da Intelligent Technology Co., Ltd. Address before: 311228 Linjiang Industrial Park, Xiaoshan District, Hangzhou, Zhejiang, No. 2977, No. six road. Patentee before: Hangzhou Sinodod Electric Co., Ltd. |