CN108331778A - Control circuit of blower for vehicle air conditioning - Google Patents
Control circuit of blower for vehicle air conditioning Download PDFInfo
- Publication number
- CN108331778A CN108331778A CN201810251130.0A CN201810251130A CN108331778A CN 108331778 A CN108331778 A CN 108331778A CN 201810251130 A CN201810251130 A CN 201810251130A CN 108331778 A CN108331778 A CN 108331778A
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- Prior art keywords
- blower
- control
- mcu
- air
- air conditioning
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
Present invention is disclosed a kind of control circuit of blower for vehicle air conditioning, automobile air conditioner control system is equipped with the MCU for controlling air-conditioning, the switching signal output ports of the MCU connect relay input terminal, the blower power supply anode of air-conditioning connects power supply through relay output end, and the speed regulating control end of the MCU connects the power cathode of air blower through secondary filter circuit with control speed adjusting module.The present invention can be very good the PWM control adjustment module running noise of motor caused by amplifying voltage fluctuation for solving tradition without control module, meet vehicle NVH performance requirements.Feature is not have to replace principal assembly component while solving the problems, such as, design alteration is avoided to lead to the great variety in cost period.
Description
Technical field
The present invention relates to automobile air conditioning technology fields more particularly to a kind of PWM to control vehicle air conditioning blower speed adjusting module
Optimisation technique.
Background technology
Currently, in known technology, the technologic material close with inventive technique effect has：CN201210091275.1、
CN201010502511.5；The former mainly describes how to solve the heat dissipation performance of vehicle air conditioning blower speed adjusting module not
It is good, and for the solution that the problem proposes, the latter describes to describe for the technology of speed adjusting module ontology；Both exist
Control plane lacks patented technology, influences client's riding experience.
Automobile research technology require it is higher and higher, especially influence client's riding experience air-conditioning and the fields NVH, noise and
Reliability requirement is continuously improved, and the standard of guidance exploitation design requirement is also being substantially improved.It is gradually carried with sale automobile type configuration
It rises, universal design is become using the car air-conditioner of speed adjusting module control, how to be directed to the speed adjusting module application that VLCL and PWM is controlled
It is exactly the technology that product development department needs to be grasped.Speed adjusting module control failure generation especially for application PWM controls is whole
The optimization design that vehicle and system abnormal sound case study verification propose, however there is no solve to be directed in development process well at present
Vehicle is generated using the speed adjusting module control failure of PWM controls and the optimization design proposed is verified in system abnormal sound case study.
Currently, air conditioner blower control principle is Air-Conditioning Control Panel by AD conversion by vehicle accumulator 12V power supply tune
Section is that 2V-3V PWM voltage signals are exported to speed adjusting module grid (poles G), and speed adjusting module is amplified by collector (poles D) by 0V
The voltage output of~12V realizes the control of air blower different voltages, that is, gear, wherein blower motor to blower motor negative terminal
Anode connects 30 electricity of vehicle (often electricity).There are hundreds of millivolts of fluctuation, fluctuation voltage outputs for square-wave voltage after usual AD conversion
It can be amplified to output after to speed adjusting module, cause blower motor negative terminal voltage unstable, which influences inductive load inclined
Greatly, the fluctuation that motor can be caused to operate, causes flabellum air-flow to change, which can cause air-flow air pressure in air-conditioning duct not stop
It is raised and lowered and covibration is caused to generate abnormal sound.If the problem is not present using the speed adjusting module of VLCL controls, because
VLCL controls speed adjusting module and carries control module, can stabilize the output voltage, but high expensive, in low compact of development cost
Using on the low side in rank vehicle.
Invention content
The technical problem to be solved by the present invention is to realize that one kind can be to avoid control while realizing air compressor control
The vehicle air conditioning blower control circuit of delay and blower motor vibration abnormal sound problem.
To achieve the goals above, the technical solution adopted by the present invention is：Control circuit of blower for vehicle air conditioning, automobile are empty
Control system is adjusted to be equipped with the MCU for controlling air-conditioning, the switching signal output ports of the MCU connect relay input terminal, empty
The blower power supply anode of tune connects power supply through relay output end, the speed regulating control end of the MCU through secondary filter circuit and
Control the power cathode of speed adjusting module connection air blower.
The control speed adjusting module is metal-oxide-semiconductor.
The ends output end connection metal-oxide-semiconductor G of the secondary filter circuit, the ends metal-oxide-semiconductor S ground connection, the ends the metal-oxide-semiconductor D connect
Connect the power cathode of air blower.
The secondary filter circuit is RC filter circuits.
Square-wave signal between the speed regulating control end output 2V-3V of the MCU, the control speed adjusting module export 0V-12V
Speed electric.
Resistance R2 connects with after capacitance C1 parallel connections with capacitance C2, and air blast is connected after the circuit constituted is in parallel with resistance R3 again
The power cathode of machine, the speed regulating control end of the MCU is through resistance R1 connection resistance R2, resistance R3 and capacitance C1.
The R1=2.2K Ω, R2=100K Ω, R3=100K Ω, C1=1nf, C2=1uf.
The present invention can be very good to solve traditional PWM controls adjustment module without control module because amplification voltage fluctuation is led
The running noise of motor of cause meets vehicle NVH performance requirements.Feature is not have to replace principal assembly portion while solving the problems, such as
Part avoids design alteration from leading to the great variety in cost period.
Description of the drawings
The content of every width attached drawing expression in description of the invention is briefly described below：
Fig. 1 is air conditioner blower control principle drawing；
Fig. 2 is knob sectional arrangement drawing (secondary filter circuit diagram).
Specific implementation mode
The present invention is that the filter circuit of PWM control speed adjusting modules is preposition, and circuit design is realized in Air-Conditioning Control Panel portion
In part, and by the fluctuation of access control secondary filter output voltage within the scope of 10 millivolts, test air blower feedback fluctuation is 300
Millivolt can achieve the effect that be substantially reduced noise, and the problem of can control to adjust air blower phase delay；Because of filter capacitor
Crossing conference causes to open and adjusting control voltage output lag, control delay, and what air conditioner blower air quantity adjusted not in time new asks
Topic occurs.
As shown in Figure 1, control circuit of blower for vehicle air conditioning cardinal principle is the operation principle of metal-oxide-semiconductor, air blower is realized
Switching function is to need to control speed adjusting module metal-oxide-semiconductor in saturation region operation, realizes that air blower speed-regulating function needs to control speed governing mould
Block metal-oxide-semiconductor is operated in magnification region, and square wave of the general MCU controls contro l signals between 2V~3V is exported to speed adjusting module
The poles G, realize that the output of speed adjusting module D pole 0V~12V reaches blower end voltage difference and realizes Boiler pressure control function；It is former herein
It is easy to carelessness MCU in reason to be filtered contro l signals, or can not effectively realize and be filtered, present invention explanation
Be the principle coordinate Fig. 2 describe secondary filter circuit can complete air conditioner blower wind speed, response time, NVH in terms of
System designs.
As shown in Fig. 2, effective secondary filter circuit diagrams of the MCU to speed adjusting module G end signals, wherein R1=2.2K Ω, R2
=100K Ω, R3=100K Ω, C1=1nf, C2=1uf；If again increased secondary filter capacitance in this principle RC filter circuits
Control can be caused to be delayed over 500 milliseconds to 4.7uf greatly, control response lag issues occur and user is caused to complain, if by two
The electronic 0.1uf that is decreased to of grade filtering can cause to control signal filtering in vain, the literary wave signal of output 300mV or so, through speed governing mould
Block amplification will increase in the ripple voltage fluctuation of air blower negative terminal to 2V~3V ranges, and inductive load blower motor is caused to have
It obviously resonates and leads to the problem of abnormal sound and also result in user's complaint.
In conjunction with Fig. 1,2 two are designed between contro l signals and PWM control the speed adjusting module G of Air-Conditioning Control Panel MCU
Grade filter circuit simultaneously designs and develops principle according to file characterising parameter, can prolong to avoid control while realizing air compressor control
Occur late with blower motor vibration abnormal sound problem..
The present invention is exemplarily described above in conjunction with attached drawing, it is clear that the present invention implements not by aforesaid way
Limitation, as long as the improvement of the various unsubstantialities of inventive concept and technical scheme of the present invention progress is used, or without changing
Other occasions are directly applied to by the design of the present invention and technical solution, within protection scope of the present invention.
Claims (7)
1. control circuit of blower for vehicle air conditioning, automobile air conditioner control system is equipped with the MCU for controlling air-conditioning, the MCU's
Switching signal output ports connect relay input terminal, and the blower power supply anode of air-conditioning connects power supply through relay output end,
It is characterized in that：The power supply that the speed regulating control end of the MCU connects air blower through secondary filter circuit with control speed adjusting module is negative
Pole.
2. control circuit of blower for vehicle air conditioning according to claim 1, it is characterised in that：The control speed adjusting module is
Metal-oxide-semiconductor.
3. control circuit of blower for vehicle air conditioning according to claim 2, it is characterised in that：The secondary filter circuit
Output end connects the ends metal-oxide-semiconductor G, and the ends metal-oxide-semiconductor S ground connection, the ends the metal-oxide-semiconductor D connect the power cathode of air blower.
4. control circuit of blower for vehicle air conditioning according to claim 3, it is characterised in that：The secondary filter circuit is
RC filter circuits.
5. control circuit of blower for vehicle air conditioning according to claim 1,2,3 or 4, it is characterised in that：The tune of the MCU
Square-wave signal between fast control terminal output 2V-3V, the speed electric of the control speed adjusting module output 0V-12V.
6. control circuit of blower for vehicle air conditioning according to claim 5, it is characterised in that：Resistance R2 is in parallel with capacitance C1
It connects afterwards with capacitance C2, the power cathode of air blower, the speed governing of the MCU is connected after the circuit constituted is in parallel with resistance R3 again
Control terminal is through resistance R1 connection resistance R2, resistance R3 and capacitance C1.
7. control circuit of blower for vehicle air conditioning according to claim 6, it is characterised in that：R1=2.2K Ω, R2
=100K Ω, R3=100K Ω, C1=1nf, C2=1uf.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810251130.0A CN108331778A (en) | 2018-03-26 | 2018-03-26 | Control circuit of blower for vehicle air conditioning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810251130.0A CN108331778A (en) | 2018-03-26 | 2018-03-26 | Control circuit of blower for vehicle air conditioning |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108331778A true CN108331778A (en) | 2018-07-27 |
Family
ID=62931387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810251130.0A Pending CN108331778A (en) | 2018-03-26 | 2018-03-26 | Control circuit of blower for vehicle air conditioning |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108331778A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4408442A1 (en) * | 1994-03-12 | 1995-09-14 | Telefunken Microelectron | Circuit to control speed of universal motor e.g for vehicle air conditioner |
| CN202451445U (en) * | 2011-11-10 | 2012-09-26 | 上海福太隆汽车电子科技有限公司 | Control circuit for blower of automobile air conditioner |
| CN202468389U (en) * | 2011-09-30 | 2012-10-03 | 合肥同智机电控制技术股份有限公司 | Automobile air-conditioner blower speed adjusting device |
| CN103758773A (en) * | 2014-01-02 | 2014-04-30 | 奇瑞汽车股份有限公司 | Automobile air conditioner blower control method |
| CN204880553U (en) * | 2015-08-28 | 2015-12-16 | 安徽江淮汽车股份有限公司 | Drum fan control of vehicle air conditioner system circuit |
| CN206741340U (en) * | 2017-06-06 | 2017-12-12 | 河南大洋纱线有限公司 | Combing machine temperature control circuit |
-
2018
- 2018-03-26 CN CN201810251130.0A patent/CN108331778A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4408442A1 (en) * | 1994-03-12 | 1995-09-14 | Telefunken Microelectron | Circuit to control speed of universal motor e.g for vehicle air conditioner |
| CN202468389U (en) * | 2011-09-30 | 2012-10-03 | 合肥同智机电控制技术股份有限公司 | Automobile air-conditioner blower speed adjusting device |
| CN202451445U (en) * | 2011-11-10 | 2012-09-26 | 上海福太隆汽车电子科技有限公司 | Control circuit for blower of automobile air conditioner |
| CN103758773A (en) * | 2014-01-02 | 2014-04-30 | 奇瑞汽车股份有限公司 | Automobile air conditioner blower control method |
| CN204880553U (en) * | 2015-08-28 | 2015-12-16 | 安徽江淮汽车股份有限公司 | Drum fan control of vehicle air conditioner system circuit |
| CN206741340U (en) * | 2017-06-06 | 2017-12-12 | 河南大洋纱线有限公司 | Combing machine temperature control circuit |
Non-Patent Citations (2)
| Title |
|---|
| 王季秩 等: "《微特电机应用技术手册》", 31 January 2003 * |
| 王永康: "《继电器保护及自动装置》", 31 May 1992 * |
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Application publication date: 20180727 |
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