CN203856750U - Double-circuit alternating current fan fault detection device - Google Patents
Double-circuit alternating current fan fault detection device Download PDFInfo
- Publication number
- CN203856750U CN203856750U CN201420080799.5U CN201420080799U CN203856750U CN 203856750 U CN203856750 U CN 203856750U CN 201420080799 U CN201420080799 U CN 201420080799U CN 203856750 U CN203856750 U CN 203856750U
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- circuit
- double
- detection device
- fan
- current
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- 238000001514 detection method Methods 0.000 title claims abstract description 39
- 238000002955 isolation Methods 0.000 claims abstract description 23
- 230000008878 coupling Effects 0.000 claims abstract description 17
- 238000010168 coupling process Methods 0.000 claims abstract description 17
- 238000005859 coupling reaction Methods 0.000 claims abstract description 17
- 230000003287 optical effect Effects 0.000 claims abstract description 17
- 238000004891 communication Methods 0.000 claims description 12
- 230000009977 dual effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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- Control Of Positive-Displacement Air Blowers (AREA)
Abstract
The utility model discloses a double-circuit alternating current fan fault detection device. The double-circuit alternating current fan fault detection device comprises two fan fault detection circuits I and II with the same principles and a power supply work indicating circuit; the two fan fault detection circuits respectively comprise a current detection circuit, an optical coupling isolation circuit, a comparison circuit and a fan fault indicating circuit. The double-circuit alternating current fan fault detection device is characterized in that the output end of the current detection circuit is connected with the input end of the optical coupling isolation circuit; the output end of the optical coupling isolation circuit is connected with the input end of the comparison circuit; the output end of the comparison circuit is connected with the fan fault indicating circuit; the power supply work indicating circuit consists of a current-limiting resistor and a light-emitting diode. The double-circuit alternating current fan fault detection device aims to monitor the working condition online in the fan working process, is simple in structure and convenient to use and can simultaneously detect states of two fans.
Description
Technical field
The utility model relates to double-circuit communication fan trouble detection technique, is particularly applicable to AC blower fan failure protecting device.
Background technique
At present, have in the product that ventilation and heat requires at industrial occasions, manufacturing, home appliance and other, AC blower fan is used in a large number.In AC blower fan running, break down and can have a strong impact on the safety of whole consumer, so using AC blower fan, in the time that it breaks down, must overhaul replacing, guarantee the Security of consumer.
Summary of the invention
The purpose of this utility model is exactly the on-line monitoring in order to realize working state in blower fan working procedure, and a kind of AC blower fan Fail detecting apparatus is provided, and it is simple in structure, easy to use, and can detect two machine states simultaneously.
The purpose of this utility model is achieved by the following technical measures: double-circuit communication fan trouble detection device, comprises fan failure detection circuit I, II and power work indicating circuit that two-way principle is identical.The fan failure detection circuit that two-way principle is identical comprises current detection circuit, optical coupling isolation circuit, comparison circuit, fan trouble indicating circuit respectively, it is characterized in that: the output terminal of described current detection circuit and the input end of optical coupling isolation circuit are connected, the output terminal of optical coupling isolation circuit and the input end of comparison circuit are connected, and the output terminal of comparison circuit and fan trouble indicating circuit are connected; Described power work indicating circuit is made up of current-limiting resistance and light emitting diode.
In technique scheme, described current detection circuit I, II are connected and form successively by current transformer, sample circuit.When AC blower fan is normally worked, 0.2A alternating current (a.c.) is transformed into the voltage signal of 5.1V left and right.If fan trouble is OV voltage signal.
In technique scheme, described optical coupling isolation circuit I, II are connected to form by optocoupler, pull-up resistor.The voltage signal of the 5.1V left and right producing when AC blower fan is normally worked is transformed into 0V voltage signal after light-coupled isolation; The voltage signal of the 0V left and right producing during by AC blower fan fault is transformed into 15V voltage signal after light-coupled isolation.
In technique scheme, described comparison circuit I, II are made up of the intergrated circuit LM393 with dual comparator unit.By AC blower fan normally work, 0V, 15V voltage and 7.5V voltage when fault compares output, normally works, exports respectively when fault 0V, 15V voltage signal in AC blower fan.
In technique scheme, described fan trouble indicating circuit I, II are made up of LED light, current-limiting resistance, and convection flow fan is normally worked, fault state shows.
In technique scheme, described power work indicating circuit is made up of LED light, current-limiting resistance.
The utility model is simple in structure, easy to use, has the following advantages:
(1) current detection circuit converts the Ac from tested blower fan through current transformer, then through optical coupling isolation circuit, through twice isolation, circuit working is safer.
(2) circuit form is simple, cost is low.
(3) power consumption is little, and volume is little, and strong adaptability is convenient in parallel use.
Brief description of the drawings
Fig. 1 is the utility model double-circuit communication fan trouble detection device integrated circuit schematic diagram.
Fig. 2,3 is current detection circuit I in the utility model embodiment, II schematic diagram.
Fig. 4,5 is the utility model embodiment optical coupling isolation circuit I, II schematic diagram.
Fig. 6,7 is comparison circuit and fan trouble indicating circuit I in the utility model embodiment, II schematic diagram.
Fig. 8 is power work indicating circuit schematic diagram in the utility model embodiment.
Embodiment
Below in conjunction with accompanying drawing, the utility model will be further described.
As shown in Figure 1, a kind of double-circuit communication fan trouble detection device, comprises fan failure detection circuit I, II and power work indicating circuit that two-way principle is identical.The fan failure detection circuit that two-way principle is identical comprises current detection circuit, optical coupling isolation circuit, comparison circuit, fan trouble indicating circuit respectively, it is characterized in that: the output terminal of described current detection circuit and the input end of optical coupling isolation circuit are connected, the output terminal of optical coupling isolation circuit and the input end of comparison circuit are connected, and the output terminal of comparison circuit and fan trouble indicating circuit are connected; Described power work indicating circuit is made up of current-limiting resistance and light emitting diode.
As shown in Figure 2,3, described current detection circuit I, II, be made up of current transformer, sample circuit, and when this circuit is normally worked AC blower fan, 0.2A alternating current (a.c.) is transformed into the voltage signal of 5.1V left and right.If fan trouble is OV voltage signal.
As shown in Figure 4,5, described optical coupling isolation circuit I, II, connected to form by optocoupler, pull-up resistor.The voltage signal of the 5.1V left and right producing when AC blower fan is normally worked is transformed into 0V voltage signal after light-coupled isolation; The voltage signal of the 0V left and right producing during by AC blower fan fault is transformed into 15V voltage signal after light-coupled isolation.This circuit is isolated the voltage signal after mutual inductor isolation again, better reliability.
As shown in Figure 6,7; described comparison circuit and fan trouble indicating circuit I, II; LM3923 has two groups of comparing units; by AC blower fan normally work, 0V, 15V voltage and 7.5V voltage when fault compares output; normally work, export respectively when fault 0V, the output of 15V voltage signal in AC blower fan; through LED output display, indicate blower fan normally or fault simultaneously.Disturb for fear of signal, increased filter capacitor at comparator positive-negative input end.
As shown in Figure 8, power work indicating circuit is made up of LED light, current-limiting resistance.
In sum, every technical performance of the utility model double-circuit communication fan trouble detection device is as follows:
A) power supply voltage: DC15V ± 5%
B) tested blower fan quantity: 2
C) tested blower fan rated current parameter: 0.1A～0.2A
D) output: 0V when blower fan is normal
When fan trouble, export: DC15V
E) weight: < 1kg
F) insulation resistance (cold conditions): > 10M Ω.
Claims (6)
1. double-circuit communication fan trouble detection device, comprise fan failure detection circuit I, fan failure detection circuit II and power work indicating circuit that two-way principle is identical, the fan failure detection circuit that two-way principle is identical comprises current detection circuit, optical coupling isolation circuit, comparison circuit, fan trouble indicating circuit respectively, it is characterized in that: the output terminal of described current detection circuit and the input end of optical coupling isolation circuit are connected, the output terminal of optical coupling isolation circuit and the input end of comparison circuit are connected, and the output terminal of comparison circuit and fan trouble indicating circuit are connected; Described power work indicating circuit is made up of current-limiting resistance and light emitting diode.
2. double-circuit communication fan trouble detection device according to claim 1, is characterized in that: described current detection circuit is connected and forms successively by current transformer, sample circuit.
3. double-circuit communication fan trouble detection device according to claim 1, is characterized in that: described optical coupling isolation circuit is connected to form by optocoupler, pull-up resistor.
4. double-circuit communication fan trouble detection device according to claim 1, is characterized in that: described comparison circuit is made up of the intergrated circuit LM393 with dual comparator unit.
5. double-circuit communication fan trouble detection device according to claim 1, is characterized in that: described fan trouble indicating circuit is made up of LED light, current-limiting resistance.
6. double-circuit communication fan trouble detection device according to claim 1, is characterized in that: described power work indicating circuit is made up of LED light, current-limiting resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420080799.5U CN203856750U (en) | 2014-02-25 | 2014-02-25 | Double-circuit alternating current fan fault detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420080799.5U CN203856750U (en) | 2014-02-25 | 2014-02-25 | Double-circuit alternating current fan fault detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203856750U true CN203856750U (en) | 2014-10-01 |
Family
ID=51606604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420080799.5U Expired - Lifetime CN203856750U (en) | 2014-02-25 | 2014-02-25 | Double-circuit alternating current fan fault detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203856750U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109931287A (en) * | 2019-04-10 | 2019-06-25 | 深圳市恩玖科技有限公司 | A kind of fault detection circuit and its fault detection method of ac fan |
-
2014
- 2014-02-25 CN CN201420080799.5U patent/CN203856750U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109931287A (en) * | 2019-04-10 | 2019-06-25 | 深圳市恩玖科技有限公司 | A kind of fault detection circuit and its fault detection method of ac fan |
| CN109931287B (en) * | 2019-04-10 | 2020-06-12 | 深圳市恩玖科技有限公司 | Fault detection circuit of alternating current fan and fault detection method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141001 |