CN110165630A - Air conditioner over-voltage detection circuit, air conditioner electric control gear and air conditioner - Google Patents
Air conditioner over-voltage detection circuit, air conditioner electric control gear and air conditioner Download PDFInfo
- Publication number
- CN110165630A CN110165630A CN201910374529.2A CN201910374529A CN110165630A CN 110165630 A CN110165630 A CN 110165630A CN 201910374529 A CN201910374529 A CN 201910374529A CN 110165630 A CN110165630 A CN 110165630A
- Authority
- CN
- China
- Prior art keywords
- circuit
- voltage
- air conditioner
- connect
- input
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16504—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the components employed
- G01R19/16523—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the components employed using diodes, e.g. Zener diodes
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/1213—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for DC-DC converters
Abstract
The present invention discloses a kind of air conditioner over-voltage detection circuit, air conditioner electric control gear and air conditioner, wherein, air conditioner over-voltage detection circuit includes the first ac input end, second ac input end, rectification circuit, resistor voltage divider circuit, voltage reference chip and opto-coupled feedback circuit constitute air conditioner over-voltage detection circuit, in alternating current over-voltage, the reference pole tension of voltage reference chip is greater than internal reference voltage, voltage reference chip conducting, and control opto-coupled feedback circuit output over-voltage feedback signal to air conditioner processor or air conditioner power circuit in controller, and then corresponding input of cutting off the power, realize overvoltage protection.The present invention realizes voltage detecting using voltage reference chip internal preset reference voltage, smaller by the current value of resistor voltage divider circuit, and the power that resistor voltage divider circuit is lost is milliwatt, to reduce loss and cost.
Description
Technical field
The present invention relates to air conditioner technical field, in particular to a kind of air conditioner over-voltage detection circuit, the automatically controlled dress of air conditioner
It sets and air conditioner.
Background technique
Input ac voltage is carried out in air conditioner at present to use dedicated over-voltage in the circuit of Zenith tracking substantially
Detection chip, dedicated over-voltage detection chip is expensive, or is sampled and exported using the biggish sampling resistor partial pressure of loss
Over-voltage signal is to the form of detection chip, and the electric current for flowing through sampling resistor is excessive, leads to be lost the power consumption on sampling resistor
It is larger.Using dedicated over-voltage detection chip to input voltage carry out detection mode higher cost, and use divider resistance and
Detection chip mode then exists compared with lossy.
Summary of the invention
The main object of the present invention is to provide a kind of air conditioner over-voltage detection circuit, it is intended to solve using special chip to defeated
Enter voltage and carry out detection mode higher cost, the problem of using divider resistance and detection chip mode compared with lossy.
To achieve the above object, a kind of air conditioner over-voltage detection circuit proposed by the present invention, comprising:
First ac input end, the second ac input end, rectification circuit, resistor voltage divider circuit, voltage reference chip and light
Coupling feed circuit；
The power input of the rectification circuit is connect with first ac input end and the second ac input end respectively,
The power output end of the rectification circuit is connect with the input terminal of the resistor voltage divider circuit, the signal of the resistor voltage divider circuit
Output end is connect with the reference pole of the voltage reference chip, the plus earth of the voltage reference chip, the voltage reference
The cathode of chip is connect with the signal input part of the opto-coupled feedback circuit, and the signal output end of the opto-coupled feedback circuit is institute
State the signal output end of air conditioner over-voltage detection circuit；
The rectification circuit, the alternating current for inputting first ac input end and second ac input end
It is rectified and exports direct current to the resistor voltage divider circuit；
The resistor voltage divider circuit, for carrying out partial pressure sampling to the direct current, and output voltage sampled signal is to institute
State voltage reference chip；
The voltage reference chip, the voltage value for the voltage sampling signal are connected when being greater than reference voltage, and defeated
Over-voltage detects signal to the opto-coupled feedback circuit out；
The opto-coupled feedback circuit for over-voltage detection signal to be carried out signal isolation, and exports.
In one embodiment, the resistor voltage divider circuit includes first input end and the second input terminal, the rectification circuit
Including first diode and zener diode, the anode of the first diode is connect with first ac input end, described
The cathode of first diode is connect with the first input end of the resistor voltage divider circuit, the cathode of the zener diode with it is described
The connection of second ac input end, the anode of institute's zener diode are connect with the second input terminal of the resistor voltage divider circuit.
In one embodiment, the opto-coupled feedback circuit includes optocoupler, first resistor, second resistance, 3rd resistor, first
Capacitor, the first operating voltage input terminal and the second operating voltage input terminal；
The cathode of the voltage reference chip is connect with the cathode of the optocoupler, the anode of the optocoupler and first electricity
The first end of resistance connects, and the second end of the first resistor is connect with the first operating voltage input terminal, the hair of the optocoupler
Emitter grounding, the first end interconnection of the collector of the optocoupler, the first end of the second resistance and 3rd resistor, described second
The second end of resistance is connect with the second operating voltage input terminal, the first end of the 3rd resistor and the first capacitor
First end connection, it is defeated that the second end of the first capacitor is grounded the signal that its connecting node is the air conditioner over-voltage detection circuit
Outlet.
In one embodiment, the model TL431 of the voltage reference chip.
The present invention also proposes a kind of air conditioner electric control gear, including power circuit and air conditioner over-voltage as described above detection
Circuit, the power circuit include current rectifying and wave filtering circuit, switching circuit, controller and voltage conversion circuit；
The first input end of the current rectifying and wave filtering circuit is connect with first ac input end, the current rectifying and wave filtering circuit
The second input terminal connect with second ac input end, the output head anode of the current rectifying and wave filtering circuit and the voltage turn
Change the first input end connection of circuit, the first end company of the negative pole of output end of the current rectifying and wave filtering circuit and the switching circuit
Connect, the second end of the switching circuit is connect with the second input terminal of the voltage conversion circuit, the switching circuit it is controlled
End is connect with the control terminal of the controller, and the first output end of the voltage conversion circuit and first operating voltage export
End connection, the second output terminal of the voltage conversion circuit are connect with the second operating voltage output end；
The current rectifying and wave filtering circuit, for the alternating current of input to be carried out rectifying and wave-filtering and exports direct current；
The controller controls the switching circuit conducting or shutdown for exporting control signal；
The voltage conversion circuit for the direct current to be carried out transformation conversion, and exports the work of different voltages grade
Make voltage.
In one embodiment, the signal end of the signal output end of the air conditioner over-voltage detection circuit and the controller connects
It connects.
In one embodiment, voltage conversion circuit include transformer, the second diode, third diode, the second capacitor and
Third capacitor, the transformer include primary coil, the first secondary coil, second subprime coil；
The first end of the primary coil is connect with the output head anode of the current rectifying and wave filtering circuit, the primary coil
Second end is connect with the first end of the switching circuit, the sun of the first end of first secondary coil and second diode
Pole connection, the cathode of second diode are connect with the first end of second capacitor, and connecting node turns for the voltage
The first output end of circuit is changed, the second end of the first secondary coil is connect with the second end of second capacitor, and described second
The first end of grade coil is connect with the anode of the third diode, the cathode of the third diode and the third capacitor
First end connection, connecting node are the second output terminal of the voltage conversion circuit, the second end of the second subprime coil
It connect and is grounded with the second end of the third capacitor.
In one embodiment, the switching circuit is NMOS tube.
In one embodiment, the power circuit further includes the absorbing circuit for absorbing leakage inductance peak voltage, the suction
Receiving circuit includes the 4th resistance, the 4th capacitor and the 4th diode；The of the first end of 4th resistance, the 4th capacitor
The interconnection of the output head anode of one end and the current rectifying and wave filtering circuit, the of the second end of the 4th resistance, the 4th capacitor
The connection of the cathode of two ends and the 4th diode, the anode of the 4th diode are connect with the first end of the switching circuit.
The present invention also proposes a kind of air conditioner, including indoor unit, outdoor unit, current loop communication circuit and sky as described above
Device electric control gear, the indoor unit and the outdoor unit is adjusted to communicate by current loop communication circuit, the air conditioner electric control gear
Power output end connect with the power end of the processor of the indoor unit.
Technical solution of the present invention is by using the first ac input end, the second ac input end, rectification circuit, electric resistance partial pressure
Circuit, voltage reference chip and opto-coupled feedback circuit constitute air conditioner over-voltage detection circuit, the first ac input end and second
Power circuit of the ac input end for input AC electricity to air conditioner, for the power supply of the electrically-controlled component of air conditioner, air conditioner mistake
Press detection circuit signal end respectively with the first ac input end and the second ac input end, rectification circuit by first exchange input
The alternating current of end and the input of the second ac input end is rectified and exports direct current to resistor voltage divider circuit, resistor voltage divider circuit
Partial pressure sampling and output voltage sampled signal are carried out to voltage reference chip, in alternating current over-voltage, voltage reference to direct current
The reference pole tension of chip is greater than internal reference voltage, voltage reference chip conducting, and controls opto-coupled feedback circuit output over-voltage
Feedback signal to air conditioner processor or air conditioner power circuit in controller, and then corresponding input of cutting off the power,
Realize overvoltage protection.The present invention realizes voltage detecting using voltage reference chip internal preset reference voltage, passes through electric resistance partial pressure
The current value of circuit is smaller, and the power that resistor voltage divider circuit is lost is milliwatt, to reduce loss and cost.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
The structure shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the module diagram of one embodiment of the air condition of that present invention over-voltage detection circuit；
Fig. 2 is the electrical block diagram of one embodiment of the air condition of that present invention over-voltage detection circuit；
Fig. 3 is the module diagram of one embodiment of the air condition of that present invention electric control gear；
Fig. 4 is the electrical block diagram of one embodiment of the air condition of that present invention electric control gear.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.It needs
Illustrate, the description for being related to " first ", " second " etc. in the present invention is used for description purposes only, and should not be understood as instruction or dark
Show its relative importance or implicitly indicates the quantity of indicated technical characteristic.The spy of " first ", " second " is defined as a result,
Sign can explicitly or implicitly include at least one of the features.
The present invention proposes a kind of air conditioner over-voltage detection circuit 10.
As shown in FIG. 1, FIG. 1 is the module diagram of one embodiment of the air condition of that present invention over-voltage detection circuit, air conditioner mistakes
Pressure detection circuit 10 include:
First ac input end L, the second ac input end N, rectification circuit 11, resistor voltage divider circuit 12, voltage reference core
Piece IC1 and opto-coupled feedback circuit 13；
The power input of rectification circuit 11 is connect with the first ac input end L and the second ac input end N respectively, rectification
The power output end of circuit 11 is connect with the input terminal of resistor voltage divider circuit 12, the signal output end and electricity of resistor voltage divider circuit 12
Press the reference pole connection of fiducial chip IC1, the plus earth of voltage reference chip IC1, the cathode and light of voltage reference chip IC1
The signal input part of coupling feed circuit 13 connects, and the signal output end of opto-coupled feedback circuit 13 is air conditioner over-voltage detection circuit 10
Signal output end；
Rectification circuit 11, for rectifying the alternating current of the first ac input end L and the second ac input end N input
And direct current is exported to resistor voltage divider circuit 12；
Resistor voltage divider circuit 12, for carrying out partial pressure sampling to direct current, and output voltage sampled signal is to voltage reference
Chip IC 1；
Voltage reference chip IC1, the voltage value for voltage sampling signal is connected when being greater than reference voltage, and output overvoltage
Signal is detected to opto-coupled feedback circuit 13；
Opto-coupled feedback circuit 13 for over-voltage detection signal to be carried out signal isolation, and exports.
In the present embodiment, while the first ac input end L and the second ac input end N are connect with rectification circuit 11, also
The power input of power circuit 20 corresponding to air conditioner connects, and power circuit 20 is used to provide work for air conditioner electrically-controlled component
Make power supply.
Rectification circuit 11 can be half-wave rectifying circuit 11 or full bridge rectifier 11, specifically can be according to actual selection.
The direct current that resistor voltage divider circuit 12 is used to export rectification circuit 11 divides, in the present embodiment, resistance point
Volt circuit 12 includes upper inclined divider resistance R5 and lower inclined divider resistance R6, one end and the rectification circuit 11 of upper inclined divider resistance R5
The connection of one output end, one end of lower inclined divider resistance R6 are connect with another output end of rectification circuit 11, and upper inclined divider resistance R5 is another
The connecting node of the other end of one end and lower inclined divider resistance R6 is the signal output end of resistor voltage divider circuit 12.
The model of voltage reference chip IC1 can carry out corresponding selection according to demand, in the present embodiment, voltage reference chip
IC1's is selected as TL431, and the reference voltage of the reference pole of voltage reference chip IC1 is 2.5V, by the way that upper inclined divider resistance is arranged
The resistance value of R5 and lower inclined divider resistance R6, in alternating current over-voltage, the reference pole tension of voltage reference chip IC1 is 2.5V, electricity
Cathode and the anode conducting of fiducial chip IC1 are pressed, and output overvoltage detects signal to opto-coupled feedback circuit 13, opto-coupled feedback circuit
13 carry out signal isolation work, and output overvoltage feedback signal, and the model of voltage reference chip IC1 can carry out pair according to demand
It should select.
Simultaneously because the detection electric current between the reference pole of voltage reference chip IC1 and anode can achieve 10uA, thus it is electric
The upper inclined divider resistance R5 and lower inclined divider resistance R6 of resistance bleeder circuit 12 can preferably use 10M ohm or more of resistance, Ke Yili
Solution, it is over-voltage more than 264V that electric appliance can safely and reliably work within the scope of alternating voltage 90V-264V, therefore,
When the voltage value of alternating current is 265V, power P=U*I=in upper inclined divider resistance R5 and lower inclined divider resistance R6 is lost
265V*10uA=2.75mW, loss power are small.
Same or different circuit board can be arranged in the electrically-controlled component of air conditioner in air conditioner over-voltage detection circuit 10
On, it can specifically be correspondingly arranged, be not particularly limited.
Technical solution of the present invention is by using the first ac input end L, the second ac input end N, rectification circuit 11, resistance
Bleeder circuit 12, voltage reference chip IC1 and opto-coupled feedback circuit 13 constitute air conditioner over-voltage detection circuit 10, the first exchange
Power circuit 20 of the input terminal L and the second ac input end N for input AC electricity to air conditioner, with automatically controlled group for air conditioner
Part power supply, the signal end of air conditioner over-voltage detection circuit 10 are whole respectively with the first ac input end L and the second ac input end N
First ac input end L and the second ac input end N alternating current inputted is rectified and exports direct current extremely by current circuit 11
Resistor voltage divider circuit 12, resistor voltage divider circuit 12 carry out partial pressure sampling and output voltage sampled signal to voltage reference to direct current
Chip IC 1, in alternating current over-voltage, the reference pole tension of voltage reference chip IC1 is greater than internal reference voltage, voltage reference core
Piece IC1 conducting, and 13 output overvoltage feedback signal of opto-coupled feedback circuit is controlled to the processor of air conditioner or the electricity of air conditioner
Controller 24 in source circuit 20, and then corresponding input of cutting off the power, realize overvoltage protection.The present invention uses voltage reference chip
IC1 internal preset reference voltage realizes voltage detecting, and the current value by resistor voltage divider circuit 12 is smaller, resistor voltage divider circuit 12
The power being lost is milliwatt, to reduce loss and cost.
As shown in Fig. 2, Fig. 2 is the electrical block diagram of one embodiment of the air condition of that present invention over-voltage detection circuit, this reality
Apply in example, resistor voltage divider circuit 12 include first input end and the second input terminal, rectification circuit 11 include first diode D1 and
Zener diode D5, the anode of first diode D1 are connect with the first ac input end L, the cathode and resistance of first diode D1
The first input end of bleeder circuit 12 connects, and the cathode of zener diode D5 is connect with the second ac input end NN, institute's pressure stabilizing two
The anode of pole pipe D5 is connect with the second input terminal of resistor voltage divider circuit 12.
In the present embodiment, rectification circuit 11 includes first diode D1 and zener diode D5, and the second diode D2 is to friendship
Galvanic electricity carries out halfwave rectifier, and zener diode D5 is used for pressure stabilizing, plays the role of clamping pressure when the voltage of alternating current is greater than 30V, and
Half-wave rectifying circuit 11 compares for full bridge rectifier 11, and cost is lower, and structure is simpler, and zener diode D5 can also be answered
With the component on the electrically-controlled component of air conditioner, such as the zener diode D5 in current loop communication circuit, to reduce design
Cost.
Please continue to refer to Fig. 2, in the present embodiment, opto-coupled feedback circuit 13 includes optocoupler U1, first resistor R1, second resistance
R2,3rd resistor R3, first capacitor C1, the first operating voltage V1 input terminal and the second operating voltage V2 input terminal；
The cathode of voltage reference chip IC1 is connect with the cathode of optocoupler U1, and the of the anode of optocoupler U1 and first resistor R1
One end connection, the second end of first resistor are connected with the first operating voltage V1 input terminal, the emitter ground connection of optocoupler U1, optocoupler U1
Collector, second resistance R2 first end and 3rd resistor R3 first end interconnection, the second end of second resistance R2 and second
The connection of operating voltage V2 input terminal, the first end of 3rd resistor R3 are connect with the first end of first capacitor C1, first capacitor C1's
Second end ground connection, connecting node are the signal output end of air conditioner over-voltage detection circuit 10.
In the present embodiment, second resistance R2 is pull-up resistor, when the non-over-voltage of alternating current, the sun of voltage reference chip IC1
Pole and cathode do not turn on, and the anode and cathode of optocoupler U1 is not turned on, and light emitting diode does not work, and the photodiode of optocoupler U1 is not
Conducting, under the action of pull-up resistor, air conditioner over-voltage detection circuit 10 exports high level.
In alternating current over-voltage, voltage reference chip IC1 conducting, the LED operation of optocoupler U1, the light of optocoupler U1
Quick diode current flow, air conditioner over-voltage detection circuit 10 export low level, the controller 24 of the power circuit 20 of air conditioner or
The processor of air conditioner can correspond to the conducting of control power switch or shutdown according to low and high level signal, to realize air conditioner
Overvoltage protection.
As shown in figure 3, Fig. 3 is the module diagram of one embodiment of the air condition of that present invention electric control gear, the present invention is also proposed
A kind of air conditioner electric control gear, air conditioner electric control gear include power circuit 20 and air conditioner over-voltage detection circuit 10, power supply electricity
Road 20 includes current rectifying and wave filtering circuit 21, switching circuit 23, controller 24 and voltage conversion circuit 22；
The first input end of current rectifying and wave filtering circuit 21 is connect with the first ac input end L, and the second of current rectifying and wave filtering circuit 21
Input terminal is connect with the second ac input end N, the output head anode of current rectifying and wave filtering circuit 21 and the first of voltage conversion circuit 22
Input terminal connection, the negative pole of output end of current rectifying and wave filtering circuit 21 connect with the first end of switching circuit 23, and the of switching circuit 23
Two ends are connect with the second input terminal of voltage conversion circuit 22, and the controlled end of switching circuit 23 and the control terminal of controller 24 connect
It connecing, the first output end of voltage conversion circuit 22 is connect with the first operating voltage V1 output end, and the second of voltage conversion circuit 22
Output end is connect with the second operating voltage V2 output end；
Current rectifying and wave filtering circuit 21, for the alternating current of input to be carried out rectifying and wave-filtering and exports direct current；
Controller 24, for exporting the conducting of control signal control switch circuit 23 or shutdown；
Voltage conversion circuit 22 for direct current to be carried out transformation conversion, and exports the operating voltage of different voltages grade.
In the present embodiment, power circuit 20 is used to export the electrically-controlled component that DC power supply is air conditioner and powers, rectification circuit
11 include rectifier bridge BR1 and filter capacitor C5, and the rectified bridge BR1 of alternating current is rectified into direct current, and filter capacitor C5 is to direct current
Energy storage and filtering are carried out, direct current is carried out transformation by voltage conversion circuit 22, and exports the work of the first operating voltage V1 and second
Voltage V2, controller 24 can be connect with the processor of air conditioner, i.e., the signal end of the processor of air conditioner and air conditioner over-voltage are examined
The signal output end of slowdown monitoring circuit 10 connects, and when the processor of air conditioner receives over-voltage feedback signal, output overvoltage is instructed to control
Device 24 processed, controller 24 instruct corresponding output control signal control switch circuit 23 conducting or shutdown, controller according to over-voltage
24 can also directly connect with controller 24, and correspond to the conducting of control switch circuit 23 or shutdown, control according to over-voltage feedback signal
Device 24, the processor of air conditioner and the over-voltage detection circuit of air conditioner processed can be correspondingly connected with, and be not particularly limited herein, one
In embodiment, the signal output end of air conditioner over-voltage detection circuit 10 is connect with the signal end of controller 24.
Voltage regulator circuit or transformer T1 etc. can be used in voltage conversion circuit 22, and accordingly, tool can be used in switching circuit 23
There are switching device of make-break capacity, such as metal-oxide-semiconductor, triode etc..
In order to reduce the cost of air conditioner electric control gear 20 and reduce design difficulty, the output end point of voltage conversion circuit 22
It is not connect with the opto-coupled feedback circuit 13 in air conditioner over-voltage detection circuit 10, to provide the work of the first operating voltage V1 and second
Voltage V2.
As shown in figure 4, Fig. 4 is the electrical block diagram of one embodiment of the air condition of that present invention electric control gear, voltage conversion
Circuit 22 includes transformer T1, the second diode D2, third diode D3, the second capacitor C2 and third capacitor C3, transformer T1
Including primary coil T1-A, the first secondary coil T1-B, second subprime coil T1-C；
The first end of primary coil T1-A is connect with the output head anode of current rectifying and wave filtering circuit 21, and the of primary coil T1-A
Two ends are connect with the first end of switching circuit 23, and the anode of the first end of the first secondary coil T1-B and the second diode D2 connect
It connects, the cathode of the second diode D2 is connect with the first end of the second capacitor C2, and connecting node is the of voltage conversion circuit 22
One output end, the second end of the first secondary coil T1-B are connect with the second end of the second capacitor C2, second subprime coil T1-C's
First end is connect with the anode of third diode D3, and the cathode of third diode D3 is connect with the first end of third capacitor C3,
Connecting node is the second output terminal of voltage conversion circuit 22, the of the second end of second subprime coil T1-C and third capacitor C3
The connection of two ends and ground connection.
In the present embodiment, the circle number of the first secondary coil T1-B and second subprime coil T1-C is different, in switching circuit 23
On-off action under, primary high pressure is converted into the first alternating voltage and the second alternating voltage, and in the second diode D2, third
Under the rectifying and wave-filtering effect of diode D3, the second capacitor C2 and third capacitor C3, the work of the first operating voltage V1 and second is exported
Voltage V2, the first operating voltage V1 and the second operating voltage V2 are for exporting to the electrically-controlled component of air conditioner and current ring communication electricity
Road provides operating voltage to provide operating voltage for the opto-coupled feedback circuit 13 of air conditioner over-voltage detection circuit 10, corresponding
Ground, switching circuit 23 are NMOS tube Q1, and NMOS tube Q1 receives the pwm signal that controller 24 exports, so that transformer T1 be made to export
Alternating current, and the first operating voltage V1 and the second operating voltage V2 are converted out, in the present embodiment, power circuit 20 is inverse-excitation type electricity
Source circuit.
Please continue to refer to Fig. 4, in the present embodiment, power circuit 20 further includes the suction for absorbing leakage inductance peak voltage spike
Circuit 25 is received, absorbing circuit 25 includes the 4th resistance R4, the 4th capacitor C4 and the 4th diode D4；The first of 4th resistance R4
The output head anode interconnection at end, the first end of the 4th capacitor C4 and current rectifying and wave filtering circuit 21, the second end of the 4th resistance R4, the 4th
The connection of the cathode of the second end of capacitor C4 and the 4th diode D4, the anode of the 4th diode D4 and the first end of switching circuit 23
Connection.
It is understood that primary coil T1-A can generate leakage inductance peak voltage in short-term in NMOS tube Q1 shutdown, leakage
Feel bigger, the leakage inductance peak voltage of generation is also bigger, and therefore, it is necessary to absorbing circuit 25 is arranged to inhale leakage inductance peak voltage
It receiving, NMOS tube Q1 is damaged to avoid leakage inductance peak voltage, the 4th diode D4 is used for the release of leakage inductance peak voltage, the
Four resistance R4 and the 4th capacitor C4 are used for the absorption of leakage inductance peak voltage.
The present invention also proposes a kind of air conditioner, which includes indoor unit, outdoor unit, current loop communication circuit and air-conditioning
Device electric control gear, the specific structure of the air conditioner electric control gear is referring to above-described embodiment, since this air conditioner uses above-mentioned institute
There are whole technical solutions of embodiment, therefore at least all beneficial effects brought by the technical solution with above-described embodiment,
This is no longer going to repeat them.Wherein, indoor unit and outdoor unit are communicated by current loop communication circuit, air conditioner electric control gear 20
The power end of the processor of power output end and indoor unit connects.
In the present embodiment, indoor unit and outdoor unit are communicated by current loop communication circuit, the electrically-controlled component of indoor unit
From the power circuit 20 of air conditioner electric control gear 20 obtain power supply, in addition, the power output end of power circuit 20 also with electric current loop
The power end of telecommunication circuit connects, to provide working power for current loop communication circuit.
Claims (10)
1. a kind of air conditioner over-voltage detection circuit characterized by comprising
First ac input end, the second ac input end, rectification circuit, resistor voltage divider circuit, voltage reference chip and optocoupler are anti-
Current feed circuit；
The power input of the rectification circuit is connect with first ac input end and the second ac input end respectively, described
The power output end of rectification circuit is connect with the input terminal of the resistor voltage divider circuit, the signal output of the resistor voltage divider circuit
End is connect with the reference pole of the voltage reference chip, the plus earth of the voltage reference chip, the voltage reference chip
Cathode connect with the signal input part of the opto-coupled feedback circuit, the signal output end of the opto-coupled feedback circuit is the sky
Adjust the signal output end of device over-voltage detection circuit；
The rectification circuit, for carrying out the alternating current of first ac input end and second ac input end input
It rectifies and exports direct current to the resistor voltage divider circuit；
The resistor voltage divider circuit, for carrying out partial pressure sampling to the direct current, and output voltage sampled signal is to the electricity
Press fiducial chip；
The voltage reference chip, the voltage value for the voltage sampling signal is connected when being greater than reference voltage, and exports
Pressure detects signal to the opto-coupled feedback circuit；
The opto-coupled feedback circuit for over-voltage detection signal to be carried out signal isolation, and exports.
2. air conditioner over-voltage detection circuit as described in claim 1, which is characterized in that the resistor voltage divider circuit includes first
Input terminal and the second input terminal, the rectification circuit include first diode and zener diode, the sun of the first diode
Pole is connect with first ac input end, the first input end of the cathode of the first diode and the resistor voltage divider circuit
Connection, the cathode of the zener diode are connect with second ac input end, the anode and the electricity of institute's zener diode
Hinder the second input terminal connection of bleeder circuit.
3. air conditioner over-voltage detection circuit as described in claim 1, which is characterized in that the opto-coupled feedback circuit includes light
Coupling, first resistor, second resistance, 3rd resistor, first capacitor, the first operating voltage input terminal and the input of the second operating voltage
End；
The cathode of the voltage reference chip is connect with the cathode of the optocoupler, the anode of the optocoupler and the first resistor
First end connection, the second end of the first resistor are connect with the first operating voltage input terminal, the emitter of the optocoupler
Ground connection, the first end interconnection of the collector of the optocoupler, the first end of the second resistance and 3rd resistor, the second resistance
Second end connect with the second operating voltage input terminal, the first of the first end of the 3rd resistor and the first capacitor
End connection, the second end of the first capacitor are grounded the signal that its connecting node is the air conditioner over-voltage detection circuit and export
End.
4. air conditioner over-voltage detection circuit as described in claim 1, which is characterized in that the model of the voltage reference chip
TL431。
5. a kind of air conditioner electric control gear, which is characterized in that including power circuit and as described in any one of claim 1-4
Air conditioner over-voltage detection circuit, the power circuit include current rectifying and wave filtering circuit, switching circuit, controller and voltage conversion electricity
Road；
The first input end of the current rectifying and wave filtering circuit is connect with first ac input end, and the of the current rectifying and wave filtering circuit
Two input terminals are connect with second ac input end, the output head anode of the current rectifying and wave filtering circuit and voltage conversion electricity
The first input end on road connects, and the negative pole of output end of the current rectifying and wave filtering circuit is connect with the first end of the switching circuit, institute
The second end for stating switching circuit is connect with the second input terminal of the voltage conversion circuit, the controlled end of the switching circuit and institute
The control terminal connection of controller is stated, the first output end of the voltage conversion circuit and the first operating voltage output end connect
It connects, the second output terminal of the voltage conversion circuit is connect with the second operating voltage output end；
The current rectifying and wave filtering circuit, for the alternating current of input to be carried out rectifying and wave-filtering and exports direct current；
The controller controls the switching circuit conducting or shutdown for exporting control signal；
The voltage conversion circuit for the direct current to be carried out transformation conversion, and exports the work electricity of different voltages grade
Pressure.
6. air conditioner electric control gear as claimed in claim 5, which is characterized in that the signal of the air conditioner over-voltage detection circuit
Output end is connect with the signal end of the controller.
7. air conditioner electric control gear as claimed in claim 5, which is characterized in that the voltage conversion circuit include transformer,
Second diode, third diode, the second capacitor and third capacitor, the transformer include primary coil, the first secondary coil,
Second subprime coil；
The first end of the primary coil is connect with the output head anode of the current rectifying and wave filtering circuit, and the second of the primary coil
End is connect with the first end of the switching circuit, and the anode of the first end of first secondary coil and second diode connects
It connects, the cathode of second diode is connect with the first end of second capacitor, and connecting node is voltage conversion electricity
First output end on road, the second end of the first secondary coil are connect with the second end of second capacitor, the second subprime line
The first end of circle is connect with the anode of the third diode, and the first of the cathode of the third diode and the third capacitor
End connection, connecting node are the second output terminal of the voltage conversion circuit, the second end of the second subprime coil and institute
It states the second end connection of third capacitor and is grounded.
8. air conditioner electric control gear as claimed in claim 7, which is characterized in that the switching circuit is NMOS tube.
9. air conditioner electric control gear as claimed in claim 8, which is characterized in that the power circuit further includes for absorbing leakage
Feel the absorbing circuit of peak voltage, the absorbing circuit includes the 4th resistance, the 4th capacitor and the 4th diode；4th electricity
The output head anode of the first end of resistance, the first end of the 4th capacitor and the current rectifying and wave filtering circuit interconnects, the 4th electricity
The cathode of the second end of resistance, the second end of the 4th capacitor and the 4th diode connects, the anode of the 4th diode with
The first end of the switching circuit connects.
10. a kind of air conditioner, which is characterized in that including indoor unit, outdoor unit, current loop communication circuit and such as claim 5-9
Any one of described in air conditioner electric control gear, the indoor unit and the outdoor unit communicated by current loop communication circuit,
The power output end of the air conditioner electric control gear is connect with the power end of the processor of the indoor unit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910374529.2A CN110165630A (en) | 2019-05-05 | 2019-05-05 | Air conditioner over-voltage detection circuit, air conditioner electric control gear and air conditioner |
| PCT/CN2020/073235 WO2020224303A1 (en) | 2019-05-05 | 2020-01-20 | Air conditioner overvoltage detection circuit, air conditioner electronic control apparatus and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910374529.2A CN110165630A (en) | 2019-05-05 | 2019-05-05 | Air conditioner over-voltage detection circuit, air conditioner electric control gear and air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110165630A true CN110165630A (en) | 2019-08-23 |
Family
ID=67633400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910374529.2A Pending CN110165630A (en) | 2019-05-05 | 2019-05-05 | Air conditioner over-voltage detection circuit, air conditioner electric control gear and air conditioner |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110165630A (en) |
| WO (1) | WO2020224303A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110173845A (en) * | 2019-05-10 | 2019-08-27 | 广东美的制冷设备有限公司 | The communication control method of air conditioner and air conditioner, device |
| CN110445366A (en) * | 2019-08-26 | 2019-11-12 | 广东美的制冷设备有限公司 | Multichannel interleaved PFC circuit and air conditioner |
| WO2020224303A1 (en) * | 2019-05-05 | 2020-11-12 | 广东美的制冷设备有限公司 | Air conditioner overvoltage detection circuit, air conditioner electronic control apparatus and air conditioner |
| CN113193792A (en) * | 2021-06-28 | 2021-07-30 | 江苏东成工具科技有限公司 | Input voltage control method |
| CN117805474A (en) * | 2024-03-01 | 2024-04-02 | 珠海泰坦科技股份有限公司 | Passive direct-current overvoltage isolation detection circuit |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117157536A (en) * | 2021-04-08 | 2023-12-01 | 伊莱克斯电器股份公司 | Household appliance and method for operating same |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102651544A (en) * | 2012-03-27 | 2012-08-29 | 深圳市朗科电器有限公司 | Over-voltage protection method for field-effect transistor |
| CN202978235U (en) * | 2012-11-30 | 2013-06-05 | 东莞市盈聚电子有限公司 | >Switch power supply high-precision overvoltage protection circuit |
| CN204615684U (en) * | 2015-05-15 | 2015-09-02 | 广东美的暖通设备有限公司 | The power module of three-phase alternating current input and air conditioner |
| EP3021444A1 (en) * | 2014-11-17 | 2016-05-18 | Eaton Electrical IP GmbH & Co. KG | Circuit for protection against overvoltages |
| CN205489447U (en) * | 2016-01-26 | 2016-08-17 | 成都赛林科技有限公司 | Modular power exports overvoltage protector |
| CN107492355A (en) * | 2017-08-07 | 2017-12-19 | 深圳市华星光电技术有限公司 | A kind of drive circuit and power supply |
| CN209327439U (en) * | 2018-10-31 | 2019-08-30 | 广东美的制冷设备有限公司 | The over-voltage detection circuit and air conditioner of air conditioner |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170212399A1 (en) * | 2013-06-16 | 2017-07-27 | Tang System | W5RS: Anlinx & Milinx & Zilinx for Green Energy Smart Window |
| CN110165630A (en) * | 2019-05-05 | 2019-08-23 | 广东美的制冷设备有限公司 | Air conditioner over-voltage detection circuit, air conditioner electric control gear and air conditioner |
-
2019
- 2019-05-05 CN CN201910374529.2A patent/CN110165630A/en active Pending
-
2020
- 2020-01-20 WO PCT/CN2020/073235 patent/WO2020224303A1/en active Application Filing
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102651544A (en) * | 2012-03-27 | 2012-08-29 | 深圳市朗科电器有限公司 | Over-voltage protection method for field-effect transistor |
| CN202978235U (en) * | 2012-11-30 | 2013-06-05 | 东莞市盈聚电子有限公司 | >Switch power supply high-precision overvoltage protection circuit |
| EP3021444A1 (en) * | 2014-11-17 | 2016-05-18 | Eaton Electrical IP GmbH & Co. KG | Circuit for protection against overvoltages |
| CN204615684U (en) * | 2015-05-15 | 2015-09-02 | 广东美的暖通设备有限公司 | The power module of three-phase alternating current input and air conditioner |
| CN205489447U (en) * | 2016-01-26 | 2016-08-17 | 成都赛林科技有限公司 | Modular power exports overvoltage protector |
| CN107492355A (en) * | 2017-08-07 | 2017-12-19 | 深圳市华星光电技术有限公司 | A kind of drive circuit and power supply |
| CN209327439U (en) * | 2018-10-31 | 2019-08-30 | 广东美的制冷设备有限公司 | The over-voltage detection circuit and air conditioner of air conditioner |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020224303A1 (en) * | 2019-05-05 | 2020-11-12 | 广东美的制冷设备有限公司 | Air conditioner overvoltage detection circuit, air conditioner electronic control apparatus and air conditioner |
| CN110173845A (en) * | 2019-05-10 | 2019-08-27 | 广东美的制冷设备有限公司 | The communication control method of air conditioner and air conditioner, device |
| CN110173845B (en) * | 2019-05-10 | 2021-10-26 | 广东美的制冷设备有限公司 | Air conditioner and communication control method and device of air conditioner |
| CN110445366A (en) * | 2019-08-26 | 2019-11-12 | 广东美的制冷设备有限公司 | Multichannel interleaved PFC circuit and air conditioner |
| CN113193792A (en) * | 2021-06-28 | 2021-07-30 | 江苏东成工具科技有限公司 | Input voltage control method |
| CN117805474A (en) * | 2024-03-01 | 2024-04-02 | 珠海泰坦科技股份有限公司 | Passive direct-current overvoltage isolation detection circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020224303A1 (en) | 2020-11-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110165630A (en) | Air conditioner over-voltage detection circuit, air conditioner electric control gear and air conditioner | |
| CN206321756U (en) | A kind of power-fail detection circuit and switching power circuit | |
| CN203026918U (en) | Input over-voltage protection circuit of smart grid terminal power supply | |
| US20220026103A1 (en) | Communication circuit for indoor and outdoor units of air conditioner and air conditioner | |
| CN209627761U (en) | LED Drive Protecting Circuit | |
| CN104467437A (en) | Low stand-by power consumption switching power supply | |
| CN111343065B (en) | Communication electric appliance and air conditioner | |
| CN209327439U (en) | The over-voltage detection circuit and air conditioner of air conditioner | |
| CN209030096U (en) | A kind of constant pressure and flow power-supplying circuit | |
| CN207801762U (en) | Remote power feeding central office terminal circuit and remote power feeding central office terminal | |
| CN210201485U (en) | Single-live-wire power taking circuit, control circuit and power supply system | |
| CN101895216B (en) | State switching circuit of wide-voltage switch | |
| CN209233112U (en) | A kind of digital camera power supply adaptor | |
| CN106787048A (en) | Possesses the charger of automatic identification input voltage function | |
| CN217037504U (en) | LED dimming circuit and dimming LED lamp | |
| CN212935791U (en) | Massage armchair power supply | |
| CN208523023U (en) | A kind of LED lamp tube of error connection proof | |
| CN210468799U (en) | Single live wire power-taking circuit | |
| CN205544882U (en) | But control front end network management set power | |
| CN206595751U (en) | Possesses the charger of automatic identification input voltage function | |
| CN208806991U (en) | A kind of constant pressure dimming power source and light adjusting system for lighting device | |
| CN108270351B (en) | A kind of constant current output circuit and power supply of increase power factor correction efficiency | |
| CN201717796U (en) | Wide voltage switch state converting circuit | |
| CN214315079U (en) | Low-loss power supply circuit of integrated circuit chip | |
| CN211859693U (en) | Charger with optical coupler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190823 |
|
| RJ01 | Rejection of invention patent application after publication |