CN207884277U - AC blower fan driving device and air conditioner - Google Patents

Abstract

The utility model discloses a kind of AC blower fan driving device and air conditioner, the fan drive device includes ac input end, rectification module, switch module, wind turbine drive module, main control module and wind turbine stall detection module, the first input end of rectification module is connect with ac input end, first output end of rectification module and the coil of AC blower fan connect, and the second input terminal and second output terminal of rectification module are connect with the output end of switch module and input terminal respectively；The test side of wind turbine stall detection module and the input terminal and output end of switch module connect, and the output end of wind turbine stall detection module is connect with main control module；When terminal voltage of the wind turbine stall detection module when detecting switch module conducting is more than predetermined voltage threshold, corresponding trigger signal is exported to main control module, so that main control module output protection signal.The problem of the utility model avoids wind turbine and stall or reversion occurs, damage wind turbine and late-class circuit, even can burn air conditioner when serious.

Description

AC blower fan driving device and air conditioner

Technical field

The utility model is related to electronic circuit technology field, more particularly to a kind of AC blower fan driving device and air conditioner.

Background technology

In current outdoor fan of air conditioner, AC blower fan cost is relatively low, and can by simply adjusting duty ratio To realize stepless speed regulation, therefore AC blower fan is widely used in air conditioner.

But in most of outdoor fan of air conditioner, the testing mechanism of fan operation state is not set, once In the operational process of AC blower fan, there is wind turbine stall, or because under the harsh conditions such as typhoon, wind turbine is in inverted status, It can then cause the electric current of blower motor winding to increase, and damage wind turbine and control the late-class circuit of AC blower fan work, when serious Air conditioner even can be burnt.

Utility model content

The main purpose of the utility model is a kind of AC blower fan driving device of proposition and air conditioner, it is intended to wind turbine be avoided to go out Existing stall or reversion and cause the electric current of blower motor winding to increase, damage wind turbine and the rear class for controlling AC blower fan work are electric Road occurs when serious or even the problem of burning air conditioner.

To achieve the above object, the utility model proposes a kind of AC blower fan driving device, the fan drive device packets Ac input end, rectification module, switch module, wind turbine drive module, main control module and wind turbine stall detection module are included, it is described The first input end of rectification module is connect with the ac input end, the first output end of the rectification module and AC blower fan Coil connects, the second input terminal and second output terminal of the rectification module respectively with the output end of the switch module and input End connection；The test side of the wind turbine stall detection module is connect with the input terminal of the switch module and output end, the wind The output end of machine stall detection module is connect with the main control module；Wherein,

The switch module, based on the control of the wind turbine drive module, and it is the exchange to drive the rectification module Wind turbine is powered；

The wind turbine stall detection module, the terminal voltage for detecting the switch module, and according to described in detecting Terminal voltage when switch module is connected, exports corresponding trigger signal to the main control module, so that the main control module Export corresponding control signal.

Preferably, the wind turbine stall detection module includes isolated location, differential amplification unit and comparator, the isolation The first end of unit is the input terminal of the wind turbine stall detection module, the second end of the isolated location and the differential amplification The first input end of unit connects, and the second input terminal of the differential amplification unit is connect with the output end of the switch module； The output end of the differential amplification unit is connect with the normal phase input end of the comparator；The inverting input of the comparator is used In access predetermined voltage threshold, the output end of the comparator is the output end of the wind turbine stall module.

Preferably, the isolated location includes the first diode, and the cathode of first diode is the isolated location First end, the anode of first diode is the second end of the isolated location.

Preferably, the wind turbine stall detection module further includes current-limiting resistance, the first end of the current-limiting resistance with it is described The anode of first diode connects, and the second end of the current-limiting resistance is connect with the control terminal of the wind turbine drive module.

Preferably, the wind turbine stall module further includes pull down resistor, and the pull down resistor is arranged in series in described first Between diode and the second input terminal of the differential amplification unit.

Preferably, the switch module includes N-MOS pipes, the N-MOS pipes, and the drain electrode of the N-MOS pipes is described opens The input terminal of module is closed, the source electrode of the N-MOS pipes is the output end of the switch module, and the grid of the N-MOS pipes is institute State the controlled end of switch module.

Preferably, the AC blower fan driving device further includes the first afterflow module and DC bus, first afterflow The input terminal of module is connect with the negative pole end of the DC bus, output end and the rectification module of the first afterflow module Input terminal connection.

Preferably, the AC blower fan driving device further includes the second afterflow module, the second afterflow module input It is connect with the input terminal of the rectification module, the output end of the second afterflow module connects with the positive terminal of the DC bus It connects.

Preferably, the first afterflow module includes the second diode, and the anode of second diode is described first The input terminal of afterflow module, the cathode of second diode are the output end of the first afterflow module；

The second afterflow module includes third diode, and the anode of the third diode is the second afterflow module Input terminal, the cathode of the third diode is the output end of the second afterflow module.

The utility model further includes a kind of air conditioner, including AC blower fan driving device as described above；The wind turbine drives Dynamic device includes ac input end, rectification module, switch module, wind turbine drive module, main control module and the detection of wind turbine stall Module, the first input end of the rectification module are connect with the ac input end, the first output end of the rectification module with The coil of AC blower fan connects, and the second input terminal and second output terminal of the rectification module are defeated with the switch module respectively Outlet is connected with input terminal；The test side of the wind turbine stall detection module connects with the input terminal of the switch module and output end It connects, the output end of the wind turbine stall detection module is connect with the main control module；Wherein, the switch module is based on institute The control of wind turbine drive module is stated, and the rectification module is driven to power for the AC blower fan；The wind turbine stall detects mould Block, the terminal voltage for detecting the switch module, and terminal voltage when being connected according to the switch module that detects, output Corresponding trigger signal is to the main control module, so that the main control module exports corresponding control signal.

The utility model is connected in switch module by the way that wind turbine stall detection module is arranged and drives the rectification module Under operating mode for AC blower fan power supply, the terminal voltage of detection switch module, and when detecting the switch module conducting Terminal voltage be more than predetermined voltage threshold, that is, occur wind turbine stall or reversion failure and cause the electric current on AC blower fan excessive When, corresponding trigger signal is exported to main control module, so that main control module exports stoppage protection signal, or control exchange Wind turbine runs slowly.The utility model, which avoids wind turbine, to be there is stall or reversion and the electric current of blower motor winding is caused to increase Greatly, the late-class circuit of damage wind turbine and control AC blower fan work, occurs when serious or even the problem of burning air conditioner.

Description of the drawings

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, the structure that can also be shown according to these attached drawings obtains other attached drawings.

Fig. 1 is the function module signal that the utility model AC blower fan driving device is applied to an embodiment in air conditioner Figure；

Fig. 2 is the electrical block diagram of one embodiment of AC blower fan driving device in Fig. 1.

Drawing reference numeral explanation：

Label	Title	Label	Title
				100	AC blower fan	70	Second afterflow module
10	Rectification module	R1	Current-limiting resistance
				20	Switch module	R2	Pull-up resistor
30	Wind turbine drive module	D1	First diode
				40	Main control module	D2	Second diode
50	Wind turbine stall detection module	D3	Third diode
				51	Isolated location	AC-IN	Ac input end
52	Differential amplification unit	ACL-In	Firewire input terminal
				53	Comparator	ACN-In	Zero curve input terminal
60	First afterflow module

The embodiments will be further described with reference to the accompanying drawings for the realization, functional characteristics and advantage of the utility model aim.

Specific implementation mode

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describing, it is clear that described embodiment is only a part of the embodiment of the utility model, rather than all Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise Lower obtained every other embodiment, shall fall within the protection scope of the present invention.

If it is to be appreciated that related in the utility model embodiment directionality instruction (such as upper and lower, left and right, it is preceding, Afterwards ...), then directionality instruction be only used for explain it is opposite between each component under a certain particular pose (as shown in the picture) Position relationship, motion conditions etc., if the particular pose changes, directionality instruction also correspondingly changes correspondingly.

If, should " first ", " the in addition, relate to the description of " first ", " second " etc. in the utility model embodiment Two " etc. description is used for description purposes only, and is not understood to indicate or imply its relative importance or is implicitly indicated meaning The quantity of the technical characteristic shown." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one A this feature.In addition, the technical solution between each embodiment can be combined with each other, but must be with ordinary skill Personnel can be implemented as basis, will be understood that this technical side when the combination of technical solution appearance is conflicting or cannot achieve The combination of case is not present, also not within the protection domain of the requires of the utility model.

The utility model proposes a kind of AC blower fan driving devices, are applied in outdoor unit of the air conditioner.

AC blower fan or DC fan may be used to realize in the outdoor fan of air conditioner, and DC fan can pass through because of it The stepless speed regulation of wind turbine is realized in frequency control, can promote the efficiency of air-conditioning system, it is common to use in the air-conditioning of high energy efficiency, But in this way, the cost of air-conditioning system can be greatly improved.And AC blower fan cost is relatively low, while increasing can also be passed through Add tapped mode to realize step-governor d, but increase centre tap, can make the complex process of blower motor, in cost It rises.However AC blower fan can realize the stepless speed regulation of AC blower fan by simply adjusting duty ratio, and wind turbine at This is relatively low, is also widely used in outdoor unit of the air conditioner.

It, in use, may be because of strong wind or foreign body obstruction since the use environment of air-conditioner outdoor unit is complicated And there is wind turbine stall, it is also possible to inverting in the case of typhoon weather, in this way there is a possibility that motor is operated in power generation Under state, the electric current of blower motor winding is caused to increase, and damage wind turbine and control the late-class circuit of AC blower fan work, seriously When even can burn air conditioner.

To solve the above-mentioned problems, referring to Figures 1 and 2, in one embodiment of the utility model, the fan drive device packet It is stifled to include ac input end AC-IN, rectification module 10, switch module 20, wind turbine drive module 30, main control module 40 and wind turbine Turn detection module 50, the first input end of the rectification module 10 is connect with the ac input end AC-IN, the rectification module 10 the first output end is connect with the coil of AC blower fan 100, the second input terminal and second output terminal of the rectification module 10 It is connect respectively with the output end of the switch module 20 and input terminal；The test side of the wind turbine stall detection module 50 with it is described The input terminal of switch module 20 is connected with output end, output end and the main control module of the wind turbine stall detection module 50 40 connections；Wherein,

The switch module 20, based on the control of the wind turbine drive module 30, it is described to drive the rectification module 10 AC blower fan 100 is powered；The wind turbine stall detection module, the terminal voltage for detecting the switch module, and according to detection The terminal voltage when switch module conducting arrived, exports corresponding trigger signal to the main control module, so that the master Control module exports corresponding control signal.

The wind turbine stall detection module 50, the terminal voltage for detecting the switch module 20, and according to detecting The terminal voltage when switch module 20 is connected, exports corresponding trigger signal to the main control module 40, so that the master Control module 40 exports corresponding control signal.

In the present embodiment, ac input end includes zero curve input terminal ACN-IN and firewire input terminal ACL-IN, rectification module The alternating current of 10 pairs of firewire input terminal ACL-IN inputs exports direct current, the two output ends connection of rectification module 10 after carrying out rectification Switch module 20 provides power supply for the work of switch module 20, and rectification module 10 includes two ac input ends AC-IN, Yi Jizhi It can be discrete full bridge rectifier or integrated rectification to flow output head anode and DC output end cathode, rectification module 10 Bridge heap module.

The high voltage bearing switching tubes such as N-MOS pipes, IGBT may be used to realize in the switch module 20, and the present embodiment is preferred It is managed using N-MOS, wherein the drain electrode of the N-MOS pipes is the input terminal of the switch module 20, the source electrode of the N-MOS pipes For the output end of the switch module 20, the grid of the N-MOS pipes is the controlled end of the switch module 20.

In the present embodiment, main control module can be the main control circuit of air-conditioner outdoor unit, can also be air conditioner chamber The main control circuit of interior machine, the present embodiment are preferably the main control circuit of air conditioner room unit.The driving of wind turbine drive module 30 Ability is managed according to N-MOS and the practical situations of fan drive device are set.Wind turbine drive module 30 and main control module 40 Communication connection, wind turbine drive module 30 receive the pwm signal that main control module 40 exports, and wind turbine drive module 30 is according to receiving Pwm signal, output high level either low level come control N-MOS pipes conducting or shutdown, when N-MOS pipes be connecteds, exchange The rectified module 10 of AC power of input terminal AC-IN accesses, N-MOS pipes, AC blower fan 100 and composition current loop, to hand over The work of flow fan 100 provides AC blower fan 100.Its current loop is specific as follows：When N-MOS pipes are connected, the electricity of AC power Stream exchanges L lines, the first input end of rectified module 10, second output terminal, the drain electrode of N-MOS pipes, source from ACL-IN Pole, the second input terminal of rectification module 10, the first output end and AC blower fan 100 coil windings return to AC power ACN-IN exchanges N lines；When AC power electric current from ACN-IN i.e. exchange N lines, the coil through AC blower fan 100 around Group, the first output end of rectification module 10, the second input terminal, the source electrode and drain electrode of N-MOS pipes, rectification module 10 it is second defeated Enter end and return to the ACL-IN of AC power with first input end to exchange L lines.Certainly in other embodiments, work as switch module 20 using IGBT come when realizing, 30 adaptability design of wind turbine drive module is IGBT drive circuit, is not limited herein.

It is understood that the pwm signal duty ratio exported by adjusting main control module 40, to drive wind turbine to drive mould Block 30 controls the ON/OFF time of switch module 20 namely the ON/OFF time of N-MOS pipes, you can adjusts AC blower fan 100 Rotating speed, to realize the purpose of 100 speed governing of AC blower fan.And N-MOS is managed or the switching tubes such as IGBT are full in conducting And conducting, namely it is operated in saturated.According to N-MOS pipes or resistance characteristics of the IGBT in saturated, It would know that the internal resistance of N-MOS pipes or IGBT at this time.N-MOS is managed or IGBT internal resistances under saturation conduction state are certain , and when the electric current at N-MOS pipes source and drain terminal both ends increases, voltage potential must also will increase, and therefore, the detection of wind turbine stall Module 50 can be by 20 input and output both ends of detection switch module, i.e. N-MOS pipes source and the terminal voltage at drain terminal both ends is examined Test cross flow fan 100 whether overcurrent, and the terminal voltage detected is compared with preset voltage value, when the terminal voltage detected When more than preset voltage value, then can determine that the electric current on AC blower fan 100 at this time is excessive, namely may occur wind turbine stall or Failure is inverted, and exports corresponding trigger signal to main control module 40, so that main control module 40 exports stoppage protection signal, Or control AC blower fan 100 runs slowly.

The utility model is connected in switch module 20 by the way that wind turbine stall detection module 50 is arranged and drives the rectification Module 10 is the terminal voltage of detection switch module 20 under the operating mode that the AC blower fan 100 is powered, and is detecting the switch Terminal voltage when module 20 is connected is more than predetermined voltage threshold Vref, that is, wind turbine stall or reversion failure occurs and causes to exchange When electric current on wind turbine 100 is excessive, corresponding trigger signal is exported to main control module 40, so that the output of main control module 40 stops Machine protection signal, or control AC blower fan 100 run slowly.The utility model avoid wind turbine there is stall or reversion and The electric current of blower motor winding is caused to increase, damage wind turbine and the late-class circuit for controlling the work of AC blower fan 100, when serious even The problem of air conditioner can be burnt, occurs.

Referring to Figures 1 and 2, it should be noted that when IGBT ends, will be produced on the winding coil of AC blower fan 100 Raw induced electromotive force, and, the sense that the winding coil of AC blower fan 100 on generates different with the current direction of above-mentioned AC power Electromotive force is answered to correspond to polarity also different.In order to which the induced electromotive force generated on the winding coil to AC blower fan 100 carries out afterflow It releases, the present embodiment corresponds to the induced electromotive force of opposed polarity, is provided with the first afterflow module 60 and the second afterflow module 70, and When switch module 20 turns off, this induced electromotive force is released, to ensure that AC blower fan 100 can work normally.

Wherein, the input terminal of the first afterflow module 60 is connect with the negative pole end DC- of the DC bus, and described first The output end of afterflow module 60 is connect with the input terminal of the rectification module 10.

Second afterflow module, 70 input terminal is connect with the input terminal of the rectification module 10, the second afterflow module 70 output end is connect with the positive terminal DC+ of the DC bus.

Specifically, when switch module 20 turns off, the induced electromotive force generated on the winding coil of AC blower fan 100 passes through Continuous current circuit carries out afterflow and releases, and the circuit for constituting continuous current circuit includes the first afterflow module 60 or the second afterflow module 70, whole Flow module 10, wind turbine winding.Electric current in continuous current circuit passes through above-mentioned first afterflow module 60 or the second afterflow module 70, rectification Module 10 and DC bus.It should be noted that since the alternating current by AC blower fan 100 is from firewire input terminal ACL-IN It sets out and zero curve input terminal ACN-IN lines sets out two kinds of directions, therefore 100 winding wire of AC blower fan when switch module 20 ends The induced electromotive force polarity generated on circle by its coil by alternating current direction difference by it is different, because of different inductions The corresponding continuous current circuit of electromotive force polarity is different, and when alternating current direction is from input terminal L lines, current direction is The B terminals of AC blower fan 100 flow to A terminals, at this time when switch module 20 ends, 100 winding coil of AC blower fan The induced electromotive force direction of upper generation is that the ends B are negative, and the ends A are that just, it carries out the circuit that afterflow is released to induced electromotive force at this time Electric current is specially：It is female by the output end of rectification module 10, the second afterflow module 70, direct current from firewire input terminal ACL-IN The positive terminal DC+ of line, the negative pole end DC- of DC bus, the first afterflow module 60,10 AC blower fan 100 of rectification module, finally Zero curve input terminal ACN-IN is returned to, i.e. induced electromotive force is released by the progress afterflow of this circuit, passes through electricity in this continuous current circuit Machine current direction is identical by 100 current direction of AC blower fan before ending with switch module 20, therefore the electric current pair in this circuit Induced electromotive force plays the role of afterflow and releases.And when alternating current direction is from input terminal N lines, current direction is exchange wind The A terminals of machine 100 flow to B terminals, at this time when switch module 20 ends, are generated on 100 winding coil of AC blower fan Induced electromotive force direction be the ends A be negative, the ends B are that just, it carries out loop current for releasing of afterflow to induced electromotive force and has at this time Body is specially：From zero curve input terminal ACN-IN by AC blower fan 100, rectification module 10, the second afterflow module 70, straight Stream busbar anode DC+, DC bus cathode DC-, rectification module 10 return to firewire input terminal ACL-IN, lead in this continuous current circuit Cross also identical by 100 current direction of AC blower fan before 100 current direction of AC blower fan and switch module 20 turn off, therefore this time Electric current in road plays the role of afterflow to induced electromotive force and releases.

It is understood that in above-described embodiment, since the first afterflow module 60 and the second afterflow module 70 are unidirectionally to pass Effect is led, could different continuous current circuits be formed to the induced electromotive force of above-mentioned opposed polarity respectively and induced electromotive force is continued It flows and puts, ensure that the normal work of motor；Meanwhile unidirectional conduction also acts as buffer action, ensures to lead in switch module 20 Logical high direct voltage when being powered to AC blower fan 100, exported from rectification module 10, which will not be sealed in into switch module 20, to be made It obtains switch module 20 can not work normally, that is, plays the role of the DC voltage of the output of isolation rectification module 10.The present embodiment according to The one-way conduction of diode, the first afterflow module 60 and the second afterflow module 70 preferably use the second diode D2 and the respectively Three diode D3 realize that specifically, the anode of the second diode D2 is the input terminal of the first afterflow module 60, institute The cathode for stating the second diode D2 is the output end of the first afterflow module 60；The anode of the third diode D3 is institute The input terminal of the second afterflow module 70 is stated, the cathode of the third diode D3 is the output end of the second afterflow module 70.

Referring to Figures 1 and 2, in above-described embodiment, the wind turbine stall detection module 50 is put including isolated location 51, difference Big unit 52 and comparator 53, the first end of the isolated location 51 are the input terminal of the wind turbine stall detection module 50, institute The second end for stating isolated location is connect with the first input end of the differential amplification unit 52, the differential amplification unit 52 Second input terminal is connect with the output end of the switch module 20；The output end of the differential amplification unit 52 and the comparison The normal phase input end of device 53 connects；The inverting input of the comparator 53 is for accessing predetermined voltage threshold Vref, the ratio Compared with the output end that the output end of device 53 is the wind turbine stall module.

In the present embodiment, control of the isolated location 51 based on wind turbine drive module 30, and exported in wind turbine drive module 30 It is connected when high level, and ends when wind turbine drive module 30 exports low level.Due to aforementioned induced electromotive force and afterflow Reason can form the high pressure for the positive terminal DC+ for about waiting DC bus in the second output terminal of the rectification module 10, described at this time Isolated location turns off, to avoid the High voltage output on DC bus to the wind turbine drive module 30 and differential amplification unit 52. Wherein, it is the isolated location that the isolated location 51, which preferably uses the cathode of the first diode D1, the first diode D1, 51 first end, the anode of the first diode D1 are the second end of the isolated location 51.

According to the conduction of diode, the first diode D1 conductings when wind turbine drive module 30 exports high level, with reality Now the terminal voltage of switch module 20 is checked, and when switch module 20 turns off, the first diode D1 cut-offs, to prevent High pressure electricity output on DC bus is to wind turbine drive module 30 and differential amplification unit 52.

In the present embodiment, it is to be understood that an input terminal of differential amplification unit 52 is connected to through the first diode D1 The drain electrode of N-MOS pipes, another input terminal are connected to the source electrode of N-MOS pipes, are carried out to N-MOS pipe drain-source extreme voltages to realize Detection, and the terminal voltage to detecting carries out differential amplification processing, to press down to the common-mode signal in the terminal voltage detected System effectively improves the terminal voltage of acquisition so that output is less to common mode interference in the terminal voltage detecting signal of comparator 53 Detect the accuracy of signal.It is understood that the terminal voltage that the present embodiment detects is the first diode D1 both end voltages The sum of with N-MOS pipe drain-source extreme voltages, passes through and detect the first diode D1 both end voltages and N-MOS pipe drain-source extreme voltages The sum of, you can determine electric current on wind turbine winding whether overcurrent.

In the present embodiment, the input terminal of one end connection differential amplification unit 52 of comparator 53, the default electricity of other end access Pressure threshold value Vref namely overcurrent compare threshold value, such as the normal phase input end of comparator 53 connects the input terminal of differential amplification unit 52, Inverting input then accesses predetermined voltage threshold Vref, when the output of the differential amplification module compares threshold value more than the overcurrent When, comparator 53 exports high level to main control module 40.Or the anti-phase input of comparator 53 terminates differential amplification unit 52 Input terminal, normal phase input end then accesses predetermined voltage threshold Vref, when the output of the differential amplification module is more than the mistake When stream compares threshold value, comparator 53 then exports low level to main control module 40, so that main control module 40 compares receiving When high level or low level that device 53 exports, stoppage protection signal is exported, or control AC blower fan 100 runs slowly.

Wherein, the isolated location 51 further includes current-limiting resistance R1, the first end of the current-limiting resistance R1 and described first The anode of diode D1 connects, and the second end of the current-limiting resistance R1 is connect with the control terminal of the wind turbine drive module 30.

In the present embodiment, current-limiting resistance R1 burns for preventing from exporting excessive to the electric current of the first diode D1 anodes One diode D1.

Referring to Figures 1 and 2, in above-described embodiment, the wind turbine stall module further includes pull down resistor R2, the drop-down electricity Resistance R2 is arranged in series between the first diode D1 and the second input terminal of the differential amplification unit 52.

In the present embodiment, pull down resistor R2 is preferably realized using the larger resistance of resistance value, and pull down resistor R2 is used in wind When machine drive module 30 exports low level and controls the first diode D1 cut-offs, the voltage of the first diode D1 anodes is pulled down, To ensure that the input terminal of difference discharge cell is low level.

The utility model also proposes that a kind of air conditioner, the air conditioner include the driving of AC blower fan 100 dress as described above It sets.The detailed construction of 100 driving device of AC blower fan can refer to above-described embodiment, and details are not described herein again；It is understood that Due to having used 100 driving device of above-mentioned AC blower fan in the utility model air conditioner, the utility model air conditioner Embodiment include whole technical solutions of 100 driving device whole embodiments of above-mentioned AC blower fan, and reached technology effect Fruit is also identical, and details are not described herein.

The above is only the preferred embodiment of the present invention, and it does not limit the scope of the patent of the present invention, Under every utility model in the utility model is conceived, equivalent structure made based on the specification and figures of the utility model Transformation, or directly/be used in other related technical areas indirectly and be included in the scope of patent protection of the utility model.

Claims (10)

1. a kind of AC blower fan driving device, which is characterized in that the fan drive device includes ac input end, rectification mould Block, switch module, wind turbine drive module, main control module and wind turbine stall detection module, the first input of the rectification module End is connect with the ac input end, and the first output end of the rectification module and the coil of AC blower fan connect, the rectification The second input terminal and second output terminal of module are connect with the output end of the switch module and input terminal respectively；The wind turbine is stifled The test side for turning detection module is connect with the input terminal of the switch module and output end, the wind turbine stall detection module it is defeated Outlet is connect with the main control module；Wherein,

The switch module, based on the control of the wind turbine drive module, and it is the AC blower fan to drive the rectification module Power supply；

The wind turbine stall detection module, the terminal voltage for detecting the switch module, and according to the switch detected Terminal voltage when module is connected exports corresponding trigger signal to the main control module, so that the main control module exports Corresponding control signal.

2. AC blower fan driving device as described in claim 1, which is characterized in that the wind turbine stall detection module include every From unit, differential amplification unit and comparator, the first end of the isolated location is the input of the wind turbine stall detection module End, the second end of the isolated location are connect with the first input end of the differential amplification unit, the differential amplification unit Second input terminal is connect with the output end of the switch module；The output end of the differential amplification unit and the comparator are just Phase input terminal connects；For accessing predetermined voltage threshold, the output end of the comparator is the inverting input of the comparator The output end of the wind turbine stall module.

3. AC blower fan driving device as claimed in claim 2, which is characterized in that the isolated location includes the one or two pole Pipe, the cathode of first diode are the first end of the isolated location, and the anode of first diode is the isolation The second end of unit.

4. AC blower fan driving device as claimed in claim 3, which is characterized in that the wind turbine stall detection module further includes Current-limiting resistance, the first end of the current-limiting resistance are connect with the anode of first diode, the second end of the current-limiting resistance It is connect with the control terminal of the wind turbine drive module.

5. AC blower fan driving device as claimed in claim 3, which is characterized in that the wind turbine stall module further includes drop-down Resistance, the pull down resistor are arranged in series between first diode and the second input terminal of the differential amplification unit.

6. AC blower fan driving device as described in claim 1, which is characterized in that the switch module includes N-MOS pipes, institute N-MOS pipes are stated, the drain electrode of the N-MOS pipes is the input terminal of the switch module, and the source electrode of the N-MOS pipes is the switch The output end of module, the grid of the N-MOS pipes are the controlled end of the switch module.

7. the AC blower fan driving device as described in claim 1 to 6 any one, which is characterized in that the AC blower fan drives Dynamic device further includes the first afterflow module and DC bus, and the input terminal of the first afterflow module is negative with the DC bus Extreme connection, the output end of the first afterflow module are connect with the input terminal of the rectification module.

8. AC blower fan driving device as claimed in claim 7, which is characterized in that the AC blower fan driving device further includes Second afterflow module, the second afterflow module input are connect with the input terminal of the rectification module, the second afterflow mould The output end of block is connect with the positive terminal of the DC bus.

9. AC blower fan driving device as claimed in claim 8, which is characterized in that the first afterflow module includes the two or two Pole pipe, the anode of second diode are the input terminal of the first afterflow module, and the cathode of second diode is institute State the output end of the first afterflow module；

The second afterflow module includes third diode, and the anode of the third diode is the defeated of the second afterflow module Enter end, the cathode of the third diode is the output end of the second afterflow module.

10. a kind of air conditioner, which is characterized in that include the AC blower fan driving dress as described in claim 1 to 9 any one It sets.