CN207281543U - A kind of abnormal detector of air conditioner blower - Google Patents
A kind of abnormal detector of air conditioner blower Download PDFInfo
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- CN207281543U CN207281543U CN201721387129.8U CN201721387129U CN207281543U CN 207281543 U CN207281543 U CN 207281543U CN 201721387129 U CN201721387129 U CN 201721387129U CN 207281543 U CN207281543 U CN 207281543U
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Abstract
The utility model provides a kind of abnormal detector of air conditioner blower, including：Air blower, drive circuit, signal acquisition circuit and MCU；Drive circuit is connected with air blower and MCU respectively；Signal acquisition circuit is connected with air blower, drive circuit and MCU respectively；Signal acquisition circuit gathers the voltage signal of air blower, and voltage signal is sent to MCU；The voltage signal is compared MCU with preset voltage value, judges whether air blower is abnormal.The abnormal detector of air conditioner blower provided by the utility model can solve the problems, such as that the abnormal conditions of air blower can not be identified in existing air conditioner blower circuit.
Description
Technical field
It the utility model is related to detection technique field, and in particular to a kind of abnormal detector of air conditioner blower.
Background technology
On-board air conditioner is generally fitted with automobile, but the air blower of on-board air conditioner is it sometimes appear that exception, needs in user
When freezing, after exception occurs in air blower, compressor operating can be caused abnormal.Since user can not discover whether compressor is in
Working status, be easy to cause compressor damage.
And the abnormal conditions of air blower can not be identified in existing air conditioner blower circuit, so as to can not be diagnosed
And processing, and compressor can be constantly in working status or frequent operation, may make evaporimeter frosting, cause the system of automobile
Cold effect reduces and compressor damage.
Utility model content
In view of above-mentioned analysis, the utility model proposes a kind of abnormal detector of air conditioner blower, to solve
The problem of abnormal conditions of air blower can not be identified in existing air conditioner blower circuit.
To achieve the above object, the utility model adopts the following technical solution：
The utility model provides a kind of abnormal detector of air conditioner blower, including：Air blower, drive circuit, letter
Number Acquisition Circuit and MCU；The drive circuit is connected with the air blower and MCU respectively；The signal acquisition circuit respectively with
The air blower, drive circuit and MCU are connected；The signal acquisition circuit gathers the voltage signal of the air blower, and will
The voltage signal is sent to the MCU；The voltage signal is compared the MCU with preset voltage value, described in judgement
Whether air blower is abnormal.
In one embodiment, the abnormal detector of air conditioner blower further includes field-effect tube, the field-effect tube difference
It is connected with the air blower, drive circuit and signal acquisition circuit.
In one embodiment, the signal acquisition circuit includes first resistor to 3rd resistor, the first capacitance, the second capacitance
And diode；One end of second resistance is connected to the drain electrode of the field-effect tube, other end ground connection by the first resistor；Institute
The first end for stating the first capacitance is connected between the first resistor and second resistance, the second end ground connection of first capacitance；
The first end of second capacitance is connected to the first end of the first capacitance by the 3rd resistor, and the second of second capacitance
End ground connection；The anode of the diode connects the first end of second capacitance, and the cathode of the diode connects the first power supply electricity
Pressure；The first end of second capacitance connects the AD ends of the MCU.
In one embodiment, the drive circuit includes the first operational amplifier, the second operational amplifier, the one or three pole
Pipe, the second triode, the 4th resistance to the 13rd resistance and the 3rd capacitance to the 6th capacitance；The drain electrode of the field-effect tube passes through
The air blower connects second source voltage, the source electrode ground connection of the field-effect tube, and the grid of the field-effect tube passes through described
4th resistance connects the collector of first triode；The emitter ground connection of first triode, first triode
Base stage connect the first control terminal of the MCU；One end of 6th resistance connects second source voltage by the 5th resistance, another
End ground connection；The reverse input end of first operational amplifier is connected between the 5th resistance and the 6th resistance, and described
The positive input of one operational amplifier is connected to the collector of second triode, the output of first operational amplifier
End is connected to the collector of first triode by the 7th resistance, and one end of the 3rd capacitance connects first computing
The reverse input end of amplifier, the other end connect the output terminal of first operational amplifier；The current collection of second triode
Pole is connected to the drain electrode of the field-effect tube by the 8th resistance, and the base stage of second triode connects the second of the MCU
Control terminal, the emitter ground connection of second triode；The first end of 9th resistance connects the collector of second triode,
The second end of 9th resistance connects the reverse input end of second operational amplifier；The first end connection institute of 4th capacitance
The second end of the 9th resistance is stated, the second end of the 4th capacitance is connected to second operational amplifier by the 12nd resistance
In-phase input end；The reverse input end of second operational amplifier is connected with output terminal, one end connection institute of the 5th capacitance
State second source voltage, other end ground connection；The first end of 13rd resistance connects the 3rd control terminal of the MCU, described
The second end ground connection of 13rd resistance；The first end of tenth resistance connects the first end of the 13rd resistance, the tenth electricity
The second end of resistance connects the second end of the 4th capacitance by the 11st resistance, one end connection of the 6th capacitance described the
The second end of ten resistance, the other end ground connection of the 6th capacitance.
Technical solutions of the utility model, have the following advantages that：
The utility model provides a kind of abnormal detector of air conditioner blower, including：Air blower, drive circuit, letter
Number Acquisition Circuit and MCU；Drive circuit is connected with air blower and MCU respectively；Signal acquisition circuit is electric with air blower, driving respectively
Road and MCU are connected；Signal acquisition circuit gathers the voltage signal of air blower, and voltage signal is sent to MCU；MCU should
Voltage signal is compared with preset voltage value, judges whether air blower is abnormal.Air-conditioning air blast provided by the utility model
The abnormal detector of machine can solve what the abnormal conditions of air blower can not be identified in existing air conditioner blower circuit
Problem.
Brief description of the drawings
, below will be right in order to illustrate more clearly of the utility model embodiment or technical solution of the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, describe below
In attached drawing be the utility model some embodiments, for those of ordinary skill in the art, do not paying creativeness
On the premise of work, other attached drawings can also be obtained according to these attached drawings.
Fig. 1 is the principle frame of a specific example of the abnormal detector of air conditioner blower in the utility model embodiment
Figure；
Fig. 2 is the circuit of a specific example of the abnormal detector of air conditioner blower in the utility model embodiment
Figure.
Embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described
Embodiment is the utility model part of the embodiment, instead of all the embodiments.Based on the embodiment in the utility model, sheet
Field those of ordinary skill all other embodiments obtained without making creative work, belong to this practicality
Novel protected scope.
, it is necessary to which explanation, term " first ", " second ", " the 3rd " etc. are only used for retouching in the description of the utility model
Purpose is stated, and it is not intended that instruction or hint relative importance.
, it is necessary to illustrate in the description of the utility model, unless otherwise clearly defined and limited, term " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or be electrically connected；It can be directly connected, can also be indirectly connected by intermediary, can be with
It is the connection inside two elements, can is wireless connection or wired connection.For those of ordinary skill in the art
For, concrete meaning of the above-mentioned term in the utility model can be understood with concrete condition.
In addition, as long as technical characteristic involved in the utility model different embodiments disclosed below is each other
Not forming conflict can be combined with each other.
The utility model provides a kind of abnormal detector of air conditioner blower, as shown in Figure 1, the air conditioner blower
Abnormal detector includes：Air blower 1, drive circuit 2, signal acquisition circuit 3 and MCU4；Drive circuit 2 respectively with air blower 1
It is connected with MCU4；Signal acquisition circuit 3 is connected with air blower 1, drive circuit 2 and MCU4 respectively；Signal acquisition circuit 3 gathers
The voltage signal of air blower 1, and the voltage signal is sent to MCU4；MCU4 is compared the voltage signal with preset voltage value
It is right, judge whether air blower 1 is abnormal.
The abnormal detector of air conditioner blower provided by the utility model, signal acquisition circuit 3 gather the electricity of air blower 1
Signal is pressed, and the voltage signal is sent to MCU4, MCU4 the voltage signal is compared with preset voltage value, judges air blast
Whether machine 1 is abnormal, and when MCU4 judges that the voltage signal of air blower 1 exceedes the preset voltage value, then judges air blower 1
Operation is abnormal, and when the voltage signal of air blower 1 is not less than the preset voltage value, then judges the normal operation of air blower 1,
So as to solve the problems, such as that the abnormal conditions of air blower can not be identified in existing air conditioner blower circuit.
As shown in Fig. 2, the abnormal detector for the air conditioner blower that the utility model embodiment provides further includes field-effect
Pipe FET, field-effect tube FET are connected with above-mentioned air blower 1, drive circuit 2 and signal acquisition circuit 3 respectively, field-effect tube
FET receives the drive signal of drive circuit 2, so as to control the on and off of air blower 1.
As shown in Fig. 2, above-mentioned signal acquisition circuit 3 includes first resistor R1 to 3rd resistor R3, the first capacitance C1, second
Capacitance C2 and diode D；One end of second resistance R2 is connected to the drain electrode of field-effect tube FET, the other end by first resistor R1
Ground connection；The first end of first capacitance C1 is connected between first resistor R1 and second resistance R2, the second termination of the first capacitance C1
Ground；The first end of second capacitance C2 is connected to the first end of the first capacitance C1 by 3rd resistor R3, and the second of the second capacitance C2
End ground connection；The anode of diode D connects the first end of the second capacitance C2, and the cathode of diode D meets the first supply voltage VCC1；The
The AD ends AD of the first end connection MCU4 of two capacitance C2.
In the abnormal detector for the air conditioner blower that the utility model embodiment provides, as the first control terminal PWM_G and
Second control terminal PWM_D is low level, and the 3rd control terminal PWM is high level, and signal acquisition circuit 3 gathers the voltage of air blower 1
Signal, the bleeder circuit formed through above-mentioned first resistor R1 and second resistance R2 carry out partial pressure and above-mentioned first capacitance C1, the
After the filter circuit of two capacitance C2 and 3rd resistor R3 compositions is handled, it is transmitted to after AD the ends AD, MCU4 of MCU4 will handle
Voltage signal be compared with preset voltage value, when the voltage signal after processing exceedes preset voltage value, MCU judge air blast
Machine 1 is abnormal, and due to the presence of above-mentioned diode D, voltage clamp can be carried out when air blower 1 is abnormal, so as to protect
Protect the AD ends AD of MCU4.
As shown in Fig. 2, above-mentioned drive circuit 2 includes the first operational amplifier OA1, the second operational amplifier OA2, the one or three
Pole pipe Q1, the second triode Q2, the 4th resistance R4 to the 13rd resistance R13 and the 3rd capacitance C3 to the 6th capacitance C6；Field-effect
The source electrode that the drain electrode of pipe FET connects second source voltage VCC2, field-effect tube FET by air blower 1 is grounded, field-effect tube FET
The grid collector that passes through the 4th resistance R4 the first triodes of connection Q1；The emitter ground connection of first triode Q1, the one or three
The first control terminal PWM_G of the base stage connection MCU4 of pole pipe Q1；One end of 6th resistance R6 passes through the 5th resistance R5 connections second
Supply voltage VCC2, other end ground connection；The reverse input end of first operational amplifier OA1 is connected to the electricity of the 5th resistance R5 and the 6th
Between hindering R6, the positive input of the first operational amplifier OA1 is connected to the collector of the second triode Q2, the first operation amplifier
The output terminal of device OA1 is connected to the collector of the first triode Q1 by the 7th resistance R7, one end connection of the 3rd capacitance C3 the
The reverse input end of one operational amplifier OA1, the other end connect the output terminal of the first operational amplifier OA1；Second triode Q2
Collector be connected to the drain electrode of field-effect tube FET by the 8th resistance R8, the of the base stage connection MCU4 of the second triode Q2
The emitter ground connection of two control terminal PWM_D, the second triode Q2；The first end of 9th resistance R9 connects the collection of the second triode Q2
Electrode, the second end of the 9th resistance R9 connect the reverse input end of the second operational amplifier OA2；The first end of 4th capacitance C4 connects
The second end of the 9th resistance R9 is connect, the second end of the 4th capacitance C4 is connected to the second operational amplifier by the 12nd resistance R12
The in-phase input end of OA2；The reverse input end of second operational amplifier OA2 is connected with output terminal, and one end of the 5th capacitance C5 connects
Connect second source voltage VCC2, other end ground connection；The 3rd control terminal PWM of the first end connection MCU4 of 13rd resistance R13, the
The second end ground connection of 13 resistance R13；The first end of tenth resistance R10 connects the first end of the 13rd resistance R13, the tenth resistance
The second end of R10 passes through the second end of the 4th capacitance C4 of the 11st resistance R11 connections, the tenth electricity of one end connection of the 6th capacitance C6
Hinder the second end of R10, the other end ground connection of the 6th capacitance C6.
In the drive circuit 2 of the utility model embodiment, the 5th resistance R5 is identical with the resistance value of the 8th resistance R8, the 6th electricity
It is identical with the resistance value of the 9th resistance R9 to hinder R6.When opening air blower 1, the 3rd control terminal PWM is high level signal, which passes
The noninverting input of the second operational amplifier OA2 is transported to, so that the voltage U3 liters of the 3rd pin of the second operational amplifier OA2
Height, the voltage U2 rises of the second pin of the second operational amplifier OA2, the voltage of the 5th pin of the first operational amplifier OA1
U5 is raised, and the pressure drop on field-effect tube FET at this time reduces, and field-effect tube FET drain voltage reduces, and can cause the first computing
The voltage U5 of the 5th pin of amplifier OA1 reduces.MCU4 changes by varying the duty cycle of the signal of the 3rd control terminal PWM
The magnitude of voltage of 3rd control terminal PWM, with reference to the closed-loop control of above-mentioned drive circuit 2 and field-effect tube so that value of voltage U5 etc.
In the value of the voltage U6 of the 6th pin of the first operational amplifier OA1 so that whole drive circuit 2 reaches dynamic stability.
Obviously, the above embodiments are merely examples for clarifying the description, and the restriction not to embodiment.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of change or
Change.There is no necessity and possibility to exhaust all the enbodiments.And the obvious change thus extended out or
Among changing still in the scope of protection of the utility model.
Claims (4)
- A kind of 1. abnormal detector of air conditioner blower, it is characterised in that including：Air blower (1), drive circuit (2), signal Acquisition Circuit (3) and MCU (4)；The drive circuit (2) is connected with the air blower (1) and MCU (4) respectively；The signal acquisition circuit (3) is connected with the air blower (1), drive circuit (2) and MCU (4) respectively；The signal acquisition circuit (3) gathers the voltage signal of the air blower (1), and the voltage signal is sent to described MCU(4)；The voltage signal is compared the MCU (4) with preset voltage value, and it is different to judge whether the air blower (1) occurs Often.
- 2. abnormal detector according to claim 1, it is characterised in that further include field-effect tube (FET), the field effect (FET) should be managed respectively with the air blower (1), drive circuit (2) and signal acquisition circuit (3) to be connected.
- 3. abnormal detector according to claim 2, it is characterised in that the signal acquisition circuit (3) includes first Resistance (R1) is to 3rd resistor (R3), the first capacitance (C1), the second capacitance (C2) and diode (D)；One end of second resistance (R2) is connected to the drain electrode of the field-effect tube (FET) by the first resistor (R1), another End ground connection；The first end of first capacitance (C1) is connected between the first resistor (R1) and second resistance (R2), described The second end ground connection of first capacitance (C1)；The first end of second capacitance (C2) is connected to by the 3rd resistor (R3) The first end of one capacitance (C1), the second end ground connection of second capacitance (C2)；The anode connection described the of the diode (D) The first end of two capacitances (C2), the cathode of the diode (D) connect the first supply voltage (VCC1)；Second capacitance (C2) First end connects the AD ends (AD) of the MCU (4).
- 4. abnormal detector according to claim 3, it is characterised in that the drive circuit (2) includes the first computing Amplifier (OA1), the second operational amplifier (OA2), the first triode (Q1), the second triode (Q2), the 4th resistance (R4) are extremely 13rd resistance (R13) and the 3rd capacitance (C3) to the 6th capacitance (C6)；The drain electrode of the field-effect tube (FET) connects second source voltage (VCC2), the field-effect by the air blower (1) The source electrode ground connection of (FET) is managed, the grid of the field-effect tube (FET) connects the one or three pole by the 4th resistance (R4) Manage the collector of (Q1)；The emitter ground connection of first triode (Q1), the base stage connection institute of first triode (Q1) State the first control terminal (PWM_G) of MCU (4)；One end of 6th resistance (R6) connects second source electricity by the 5th resistance (R5) Press (VCC2), other end ground connection；The reverse input end of first operational amplifier (OA1) is connected to the 5th resistance (R5) And the 6th between resistance (R6), the positive input of first operational amplifier (OA1) is connected to second triode (Q2) collector, the output terminal of first operational amplifier (OA1) are connected to the described 1st by the 7th resistance (R7) The collector of pole pipe (Q1), one end of the 3rd capacitance (C3) connect the reverse input of first operational amplifier (OA1) End, the other end connect the output terminal of first operational amplifier (OA1)；The collector of second triode (Q2) passes through Eight resistance (R8) are connected to the drain electrode of the field-effect tube (FET), and the base stage of second triode (Q2) connects the MCU (4) the second control terminal (PWM_D), the emitter ground connection of second triode (Q2)；The first end of 9th resistance (R9) connects The collector of second triode (Q2) is connect, the second end of the 9th resistance (R9) connects second operational amplifier (OA2) reverse input end；The first end of 4th capacitance (C4) connects the second end of the 9th resistance (R9), the 4th electricity The second end for holding (C4) is connected to the in-phase input end of second operational amplifier (OA2) by the 12nd resistance (R12)；Institute The reverse input end for stating the second operational amplifier (OA2) is connected with output terminal, one end connection described second of the 5th capacitance (C5) Supply voltage (VCC2), other end ground connection；The first end of 13rd resistance (R13) connects the 3rd control of the MCU (4) Hold (PWM), the second end ground connection of the 13rd resistance (R13)；First end connection the 13rd electricity of tenth resistance (R10) The first end of (R13) is hindered, the second end of the tenth resistance (R10) connects the 4th capacitance by the 11st resistance (R11) (C4) second end, one end of the 6th capacitance (C6) connect the second end of the tenth resistance (R10), the 6th capacitance (C6) other end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721387129.8U CN207281543U (en) | 2017-10-25 | 2017-10-25 | A kind of abnormal detector of air conditioner blower |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721387129.8U CN207281543U (en) | 2017-10-25 | 2017-10-25 | A kind of abnormal detector of air conditioner blower |
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| CN207281543U true CN207281543U (en) | 2018-04-27 |
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| CN201721387129.8U Active CN207281543U (en) | 2017-10-25 | 2017-10-25 | A kind of abnormal detector of air conditioner blower |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112082797A (en) * | 2020-09-14 | 2020-12-15 | 深圳宇信和科技有限公司 | Automobile air conditioner test system and test method based on CAN interface |
-
2017
- 2017-10-25 CN CN201721387129.8U patent/CN207281543U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112082797A (en) * | 2020-09-14 | 2020-12-15 | 深圳宇信和科技有限公司 | Automobile air conditioner test system and test method based on CAN interface |
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| GR01 | Patent grant | ||
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| CP03 | Change of name, title or address |
Address after: No. M-1, West Industrial Zone, Hongqiao Town, Yueqing City, Wenzhou City, Zhejiang Province, 325608 (Branch office: No. 1, Area A, Science and Technology Innovation Park, Hongqiao Town, Yueqing City (in Yueqing Zhongtaizhi Aluminum Door and Window Decoration Co., Ltd.) Patentee after: Daming Electronics Co.,Ltd. Address before: 325608 no.m-1, West Industrial Zone, Hongqiao Town, Yueqing City, Wenzhou City, Zhejiang Province Patentee before: DAMING ELECTRONIC CO.,LTD. |