CN110401336A - Ac input circuit and air conditioner - Google Patents
Ac input circuit and air conditioner Download PDFInfo
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- CN110401336A CN110401336A CN201910716185.9A CN201910716185A CN110401336A CN 110401336 A CN110401336 A CN 110401336A CN 201910716185 A CN201910716185 A CN 201910716185A CN 110401336 A CN110401336 A CN 110401336A
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- emi filter
- harmonic
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- 230000002401 inhibitory effect Effects 0.000 claims abstract description 9
- 239000003990 capacitor Substances 0.000 claims description 99
- 230000005611 electricity Effects 0.000 claims description 12
- 239000003063 flame retardant Substances 0.000 claims description 11
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 10
- 239000004615 ingredient Substances 0.000 description 6
- 238000004804 winding Methods 0.000 description 5
- 230000001629 suppression Effects 0.000 description 4
- 206010037660 Pyrexia Diseases 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002085 persistent effect Effects 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Power Conversion In General (AREA)
- Filters And Equalizers (AREA)
Abstract
The present invention discloses a kind of ac input circuit and air conditioner, wherein, the ac input circuit includes ac input end, EMI filter circuit, harmonic shutter and power output end, the input terminal of EMI filter circuit is connect with ac input end, the output end of EMI filter circuit and the input terminal of harmonic shutter connect, and the output end of harmonic shutter is connect with power output end；EMI filter circuit for being filtered to the AC power source that ac input end inputs, and is exported through power output end；Harmonic shutter, the harmonic signal in AC power source for inhibiting ac input end to input.The present invention improves the service life of harmonic shutter.
Description
Technical field
The present invention relates to power technique fields, in particular to a kind of ac input circuit and air conditioner.
Background technique
With the rapid development of economy, electric load constantly increases in power grid, especially various Novel electric device categories
Increasing, for certain electrical equipments during electricity consumption, load is usually variable, such as rectifier etc equipment, load
For nonlinear-load, when these equipment largely access supply network, a large amount of harmonic wave can be brought to supply network, causes to power
The voltage fluctuation of network.It is at present usually the EMI filtered electrical in supply network to solve the harmonic problem of supply network generation
The preceding-stage side setting harmonic suppression apparatus on road inhibits the harmonic wave in supply network, reduces harmonic wave in supply network to reach
Purpose.But can often occur the problem of AC harmonic inhibits device to be easily damaged in practical applications, reduce harmonic wave suppression
The service life of device processed.
Summary of the invention
The main object of the present invention is to propose a kind of ac input circuit and air conditioner, it is intended to improve making for harmonic shutter
Use the service life.
To achieve the above object, ac input circuit proposed by the present invention, the ac input circuit include exchange input
End, EMI filter circuit, harmonic shutter and power output end, the input terminal of the EMI filter circuit and the ac input end
Connection, the output end of the EMI filter circuit are connect with the input terminal of the harmonic shutter, the output of the harmonic shutter
End is connect with the power output end；
The EMI filter circuit, the AC power source for inputting to the ac input end are filtered, and through institute
State power output end output；
The harmonic shutter, the harmonic signal in AC power source for inhibiting the ac input end input.
In one embodiment, the harmonic shutter is posistor, negative temperature coefficient thermistor or reactance
Device.
In one embodiment, the EMI filter circuit includes first capacitor, common mode inductance and the second capacitor, the common mode
The first input end of inductance is connect with the first end of the first capacitor, and is the input terminal of the EMI filter circuit, described total
First output end of mould inductance is connect with the first end of second capacitor, the second input terminal of the common mode inductance and described the
The second end of two capacitors connects, and the second output terminal of the common mode inductance connect with the second end of the first capacitor, and is institute
State the output end of EMI filter circuit.
In one embodiment, the EMI filter circuit further includes third capacitor, the 4th capacitor, the 5th capacitor and the 6th electricity
Hold, the first end of the third capacitor is connect with the common end of the first end of the first capacitor and the ac input end, institute
State the common end grounding of the second end of third capacitor and the first end of the 4th capacitor, the second end of the 4th capacitor and institute
The second end connection of first capacitor is stated, the first end of the 5th capacitor is connect with the first output end of the common mode inductance, institute
State the common end grounding of the second end of the 5th capacitor and the first end of the 6th capacitor, the second end of the 6th capacitor and institute
State the second input terminal connection of common mode inductance.
In one embodiment, the ac input circuit further includes rectification circuit, and the rectification circuit is connected to described humorous
Between the output end of wave suppressor and the power output end；
The rectification circuit, for the AC power source of input to be converted to DC power supply, and it is defeated through the power output end
Out.
In one embodiment, the ac input circuit further includes the 7th capacitor and the 8th capacitor, the 7th capacitor
The first end of first end and the 8th capacitor is all connected to the first end of the rectification circuit, the second end of the 7th capacitor and the
The second end of eight capacitors is all connected to the 4th end of the rectification circuit.
In one embodiment, the ac input circuit further includes breaker, the input terminal of the breaker and the friendship
Input terminal connection is flowed, the output end of the breaker is connect with the input terminal of the EMI filter circuit.
In one embodiment, the ac input circuit further includes flame-retardant device, the input terminal of the flame-retardant device and the EMI
The input terminal of filter circuit connects, and the output end of the flame-retardant device is connect with the output end of the EMI filter circuit.
In one embodiment, the ac input circuit further includes first resistor, the first end of the first resistor and institute
The input terminal connection of EMI filter circuit is stated, the second end of the first resistor is connect with the output end of the EMI filter circuit.
The present invention also proposes that a kind of air conditioner, the air conditioner include ac input circuit as described above, the exchange
Input circuit includes ac input end, EMI filter circuit, harmonic shutter and power output end, the EMI filter circuit it is defeated
Entering end to connect with the ac input end, the output end of the EMI filter circuit is connect with the input terminal of the harmonic shutter,
The output end of the harmonic shutter is connect with the power output end；The EMI filter circuit, for being inputted to the exchange
The AC power source of end input is filtered, and is exported through the power output end；The harmonic shutter, for inhibiting
State the harmonic signal in the AC power source of ac input end input.
Harmonic shutter is arranged by the rear-stage side of the EMI filter circuit in ac input circuit in technical solution of the present invention,
So that EMI filter circuit filters the resonance current generated when returning to ac input end without going past harmonic shutter, avoid
The harmonic current of EMI filter circuit is superimposed with the harmonic signal of ac input circuit input ac power makes harmonic shutter generate heat
Amount increase the problem of, in this way, when harmonic current superposition become larger when, the electric current for flowing through harmonic shutter will not be caused excessive so that
The damage of harmonic shutter persistent fever, improves the service life of harmonic shutter.
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 structural schematic diagram of one embodiment of ac input circuit of the present invention；
Fig. 2 is the electrical block diagram of one embodiment of ac input circuit of the present invention.
Drawing reference numeral explanation:
The realization of the object of the invention, functional characteristics and it can put that the embodiments will be further described with reference to the accompanying drawings.
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 should be noted that if relate to the description of " first ", " second " etc. in the embodiment of the present invention, then should " first ",
The description of " second " etc. is used for description purposes only, and is not understood to indicate or imply its relative importance or is implicitly indicated institute
The quantity of the technical characteristic of instruction." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least
One this feature.
The present invention proposes a kind of ac input circuit and air conditioner.
In an embodiment of the present invention, reference is as shown in Figure 1, the ac input circuit includes ac input end 10, EMI
Filter circuit 20, harmonic shutter 30 and power output end 50, the input terminal of the EMI filter circuit 20 exchange input with described
10 connection of end, the output end of the EMI filter circuit 20 are connect with the input terminal of the harmonic shutter 30, the harmonics restraint
The output end of device 30 is connect with the power output end 50；
The EMI filter circuit 20, the AC power source for inputting to the ac input end 10 are filtered, and
It is exported through the power output end 50；
The harmonic shutter 30, the harmonic signal in AC power source for inhibiting the ac input end 10 to input.
In the present embodiment, EMI filter circuit 20 refers to the low-pass filtering electricity being made of current-limiting reactor and shunt capacitor
Road, frequency signal when equipment being allowed to work normally enter equipment, have biggish inhibition to the interference signal of high frequency.Power supply
Line is the main path for interfering incoming equipment and spreading out of equipment, and by power supply line, the interference of power grid can be passed to equipment, and interference is set
Standby normal work, the interference that same equipment generates may also be passed on power grid by power supply line, interfere the normal of other equipment
Work.EMI filter circuit must be added at the electric power incoming line of equipment.In the present solution, being by being inputted in AC power source
EMI filter circuit 20 is arranged in the ac input end 10 of circuit, is filtered to the AC power source of the ac input end 10 input
Processing is the high-frequency interferencing signal in the AC power source for inhibiting ac input end 10 to input, and is prevented to accessing in user family
Electrical equipment interferes.It is understood that EMI filter circuit 20 can also inhibit the electrical equipment pair accessed in user family
The interference of AC network.
Harmonic wave letter in the present embodiment, in the AC power source that harmonic shutter 30 can inhibit ac input end 10 to input
Number, it is to be understood that there are harmonic components, this programme in the AC power source that the ac input end 10 of ac input circuit inputs
In i.e. by harmonic shutter 30 inhibit AC power source in harmonic components.It should be noted that inputting electricity in existing exchange
Lu Zhong, the AC power source of input can have that harmonic components are excessive or the harmonics restraint of electrical equipment in user family is insufficient, lead
Send a telegraph that source harmonic components are excessive, the harmonic components in power supply just when by EMI filter circuit 20, can cause resonance, cause to flow
Harmonic current superposition through harmonic shutter 30.It is when the ac input end of ac input circuit is arranged in harmonic shutter 30
Between 10 and EMI filter circuit 20, the meeting of EMI filter circuit 20 is humorous to the harmonic components for the AC power source that ac input end 10 inputs
Vibration, causes the superposition of harmonics restraint electric current, and can flow through harmonic shutter 30, causes harmonic shutter 30 to overheat, when serious very
Cause fire to thermal breakdown；When harmonic shutter 30 is arranged between the common mode inductance and capacitor in EMI filter circuit 20, also can
It causes the resonance current of superposition by harmonic balancer, harmonic shutter 30 is caused to overheat, even thermal breakdown causes fire when serious
Calamity.
In the present solution, harmonic shutter 30 is set to the power output end 50 of ac input circuit, through EMI filtered electrical
The harmonic components of 20 resonance of road would not flow through harmonic shutter 30, and harmonic shutter 30 would not be because of the harmonic wave electricity of superposition at this time
Stream causes device to overheat.It is understood that appointing in 20 rear-stage side of EMI filter circuit can be set in harmonic shutter 30 herein
It anticipates position, is the position that the harmonic signal in AC power source can be set and do not flowed through through the resonance of EMI filter circuit 20, with
This makes harmonic shutter 30 not and will receive the interference of superposition harmonic current, to inhibit the harmonic components in AC power source.
Technical solution of the present invention passes through the ac input end 10 for including in ac input circuit, EMI filter circuit 20, harmonic wave
Suppressor 30 and power output end 50 are rationally arranged the positional relationship of each component in ac input circuit, prevent power supply with this
Harmonic components cause to exchange side harmonics restraint device overheat.In ac input circuit, the AC power source of input there are harmonic wave at
Divide the harmonics restraint of electrical equipment excessive or in user family insufficient, causes supply harmonic ingredient excessive, the harmonic wave in power supply
Ingredient just when by EMI filter circuit 20, can cause resonance, cause the harmonic current superposition for flowing through harmonic shutter 30；I.e.
It is resonance of the supply harmonic ingredient by common mode inductance and capacitor in EMI filter circuit 20, causes defeated from EMI filter circuit 20
It is superimposed out to the harmonic current of harmonic shutter 30.Cause to exchange 30 mistakes of side harmonic shutter to solve supply harmonic ingredient
Heat, this programme is by being arranged in the position that the harmonic current that EMI filter circuit 20 exports does not flow through for harmonic shutter 30, i.e.,
It is the power output end 50 being arranged in ac input circuit, the harmonic wave to 10 input ac power of ac input end is realized with this
Ingredient is inhibited, and is flowed through the electric current of harmonic shutter 30 without will cause and excessive is caused persistent fever.Technical solution of the present invention
Improve the service life of harmonic shutter 30.
In one embodiment, reference is as shown in Figure 1, the harmonic shutter 30 is posistor, subzero temperature system
Number thermistor or reactor.
It is understood that the harmonic wave when harmonic shutter 30 is posistor, in ac input circuit
When ingredient flows through posistor progress harmonics restraint, posistor is increased with fever, and resistance is therewith
Increase, when resistance value increases to a certain degree, ac input circuit is equivalent to open circuit, so that connection can be protected
Rectification circuit and load in harmonic shutter 30.
When harmonic shutter 30 is subzero temperature coefficient resistance, moment is inputted in the AC power source of ac input circuit,
Can generate high times of surge current when than working normally in circuit, and the initial resistance value of negative temperature coefficient thermistor compared with
It greatly, can be with electric current excessive in suppression circuit, so that the rectification circuit for being connected to harmonic shutter 30 and load can be protected.
When harmonic shutter 30 is reactor, it can equally be protected according to the self-characteristic of reactor and be connected to harmonic wave suppression
The rectification circuit of device 30 processed and load.
It should be noted that the harmonic shutter 30 in this programme, which is also possible to other, can play the device for inhibiting harmonic wave
Part, herein without limitation.
In one embodiment, reference is as shown in Figure 1, the EMI filter circuit 20 includes first capacitor C1, common mode inductance L
And the second capacitor C2, the first input end of the common mode inductance L connect with the first end of the first capacitor C1, and are described
The input terminal of EMI filter circuit 20, the first output end of the common mode inductance L are connect with the first end of the second capacitor C2,
The second input terminal of the common mode inductance L is connect with the second end of the second capacitor C2, the second output of the common mode inductance L
End is connect with the second end of the first capacitor C1, and is the output end of the EMI filter circuit 20.
It is understood that common mode inductance L is also common mode choke, EMI filtering can be played, for inhibiting high speed
The electromagnetic wave outside radiation-emitting that signal wire generates.Common mode inductance L in EMI filter circuit 20 have the first winding and second around
Group, is the input terminal of the first winding in the first input end of common mode inductance L as shown in figure 1, and the first output end of common mode inductance L is
It is the output end of the first winding, the second input terminal of common mode inductance L is the input terminal of the second winding, and the second of common mode inductance L
Output end is the output end of the second winding.
In the present embodiment, first capacitor C1 and common mode inductance L can form an EMI filter circuit 20 or the second electricity
Hold C2 and common mode inductance L can form an EMI filter circuit 20, also or first capacitor C1, the second capacitor C2 and common mode electricity
Sense L can form an EMI filter circuit 20.It is understood that the first input end input ac power of common mode inductance L,
It is filtered through first capacitor C1 and common mode inductance L, to filter out the high-frequency interferencing signal in AC power source, while also can
Resonance is carried out to the harmonic components in AC power source, to cause the superposition of harmonic current.For first capacitor C1 and common mode inductance L
The EMI filter circuit 20 of composition can flow back into ac input end 10 through the second input terminal of common mode inductance L after harmonic current superposition
Zero curve, the harmonic shutter 30 of 20 rear-stage side of EMI filter circuit is connected to without flowing through.Similarly, for the second capacitor
What the EMI filter circuit 20 or first capacitor C1, the second capacitor C2 and common mode inductance L of C2 and common mode inductance L composition formed
EMI filter circuit 20, the harmonic current of superposition flow back into the zero curve of ac input end 10 by the second end of the second capacitor C2, and
The harmonic shutter 30 for being connected to 20 rear-stage side of EMI filter circuit is not flowed through.To realize power supply in ac input circuit
Harmonic components not will lead to side harmonic shutter 30 overheats of exchange.
It should be noted that ac input end 10 have firewire, zero curve and ground wire, ginseng as shown in Figure 1, i.e. CN1 be firewire,
CN2_1, CN2_2 are zero curve, and CN9 is ground wire, and ground wire herein is protecting field.First of common mode inductance L in this programme is defeated
Entering end is the firewire for connecting ac input end 10, and the second output terminal of common mode inductance L is connect ac input end 10 zero
Line.
In above-described embodiment, the EMI filter circuit 20 further includes third capacitor C3, the 4th capacitor C4, the 5th capacitor C5
And the 6th capacitor C6, the third capacitor C3 first end and the first capacitor C1 first end and the ac input end 10
Common end connection, the common end grounding of the first end of the second end and the 4th capacitor C4 of the third capacitor C3 is described
The second end of 4th capacitor C4 is connect with the second end of the first capacitor C1, the first end of the 5th capacitor C5 with it is described total
The first output end of mould inductance L connects, and the second end of the 5th capacitor C5 is public with the first end of the 6th capacitor C6
End ground connection, the second end of the 6th capacitor C6 are connect with the second input terminal of the common mode inductance L.
It should be noted that third capacitor C3, the 4th capacitor C4, the 5th capacitor C5 and the 6th capacitor C6 herein can root
Suitable capacitance values are selected according to the test value of EMI in practical application scene, herein without limitation.
In one embodiment, reference is as shown in Figure 1, the ac input circuit further includes rectification circuit 40, the rectification
Circuit 40 is connected between the output end and the power output end 50 of the harmonic shutter 30；
The rectification circuit 40, for the AC power source of input to be converted to DC power supply, and through the power output end
50 outputs.
It is understood that the alternating current that the rectification circuit 40 in ac input circuit can input ac input end 10
Source is converted to DC power supply through EMI filter circuit 20 and harmonic shutter 30, for the power supply for electrical equipment in user family.This
Protection can also be played the role of to rectification circuit 40 when electrical equipment moment powers in user family by locating harmonic shutter 30.
Further, since the resistance value of harmonic shutter 30 is big, the high current that moment can be inhibited to power on thereby protects rectification circuit
40。
Based on the above embodiment, the ac input circuit further includes the 7th capacitor C7 and the 8th capacitor C8, and the described 7th
The first end of capacitor C7 and the first end of the 8th capacitor C8 are all connected to the first end of the rectification circuit 40, the 7th capacitor
The second end of C7 and the second end of the 8th capacitor C8 are all connected to the 4th end of the rectification circuit 40.It should be noted that the
Seven capacitor C7 are polar capacitor, and the first end of the 7th capacitor C7 is the anode of the 7th capacitor C7, the second end of the 7th capacitor C7
It is the cathode of the 7th capacitor C7.
In one embodiment, reference is as shown in Figure 1, the ac input circuit further includes breaker FR, the breaker
The input terminal of FR is connect with the ac input end 10, and the output end of the breaker FR is defeated with the EMI filter circuit 20
Enter end connection.It is understood that breaker FR is arranged in the ac input end 10 in ac input circuit, realized with this to exchange
Input circuit overloaded, short circuit, low-voltage protection.
In one embodiment, reference is as shown in Figure 1, the ac input circuit further includes flame-retardant device ZR1, the flame-retardant device
The input terminal of ZR1 is connect with the input terminal of the EMI filter circuit 20, and the output end and the EMI of the flame-retardant device ZR1 filters
The output end of circuit 20 connects.It is understood that the flame-retardant device ZR1 in this programme is a fire-retardant resistance, it is in order to prevent
In thunderstorm weather, the surge current for generation of being struck by lightning sets the electricity consumption in ac input circuit or user family by flame-retardant device ZR1
It is standby to be protected.
In one embodiment, reference is as shown in Figure 1, the ac input circuit further includes first resistor R1, and described first
The first end of resistance R1 is connect with the input terminal of the EMI filter circuit 20, the second end of the first resistor R1 and the EMI
The output end of filter circuit 20 connects.It is understood that first resistor R1 is the protection electricity being arranged according to national standards
Resistance, with this in user in the plug for needing to pull out electrical equipment, prevent user from getting an electric shock.
It should be noted that the electrical equipment mentioned in above-described embodiment can be air conditioner, refrigerator, electromagnetic oven, heating
Device etc., herein without limitation.
The present invention also proposes that a kind of air conditioner, the air conditioner include ac input circuit as described above, the exchange
Input circuit includes ac input end 10, EMI filter circuit 20, harmonic shutter 30 and power output end 50, the EMI filtering
The input terminal of circuit 20 is connect with the ac input end 10, the output end and the harmonics restraint of the EMI filter circuit 20
The input terminal of device 30 connects, and the output end of the harmonic shutter 30 is connect with the power output end 50；The EMI filtered electrical
Road 20, the AC power source for inputting to the ac input end 10 are filtered, and defeated through the power output end 50
Out；The harmonic shutter 30, the harmonic signal in AC power source for inhibiting the ac input end 10 to input.The air-conditioning
The specific structure of device is referring to above-described embodiment, since this air conditioner uses whole technical solutions of above-mentioned all embodiments, because
This at least has all beneficial effects brought by the technical solution of above-described embodiment, and this is no longer going to repeat them.
Claims (10)
1. a kind of ac input circuit, which is characterized in that the ac input circuit include ac input end, EMI filter circuit,
Harmonic shutter and power output end, the input terminal of the EMI filter circuit are connect with the ac input end, the EMI filter
The output end of wave circuit is connect with the input terminal of the harmonic shutter, and the output end of the harmonic shutter and the power supply are defeated
Outlet connection；
The EMI filter circuit, the AC power source for inputting to the ac input end are filtered, and through the electricity
Source output terminal output；
The harmonic shutter, the harmonic signal in AC power source for inhibiting the ac input end input.
2. ac input circuit as described in claim 1, which is characterized in that the harmonic shutter is positive warm coefficient heat-sensitive electricity
Resistance, negative temperature coefficient thermistor or reactor.
3. ac input circuit as described in claim 1, which is characterized in that the EMI filter circuit includes first capacitor, is total to
Mould inductance and the second capacitor, the first input end of the common mode inductance are connect with the first end of the first capacitor, and are described
The input terminal of EMI filter circuit, the first output end of the common mode inductance is connect with the first end of second capacitor, described total
Second input terminal of mould inductance is connect with the second end of second capacitor, the second output terminal of the common mode inductance and described the
The second end of one capacitor connects, and is the output end of the EMI filter circuit.
4. ac input circuit as claimed in claim 3, which is characterized in that the EMI filter circuit further include third capacitor,
4th capacitor, the 5th capacitor and the 6th capacitor, the first end of the third capacitor and the first end of the first capacitor and described
The common end of ac input end connects, the public termination of the first end of the second end of the third capacitor and the 4th capacitor
The second end on ground, the 4th capacitor is connect with the second end of the first capacitor, the first end of the 5th capacitor with it is described
First output end of common mode inductance connects, the public termination of the first end of the second end and the 6th capacitor of the 5th capacitor
The second end on ground, the 6th capacitor is connect with the second input terminal of the common mode inductance.
5. ac input circuit as described in claim 1, which is characterized in that the ac input circuit further includes rectified current
Road, the rectification circuit are connected between the output end of the harmonic shutter and the power output end；
The rectification circuit for the AC power source of input to be converted to DC power supply, and is exported through the power output end.
6. ac input circuit as claimed in claim 5, which is characterized in that the ac input circuit further includes the 7th capacitor
With the 8th capacitor, the first end of the 7th capacitor and the first end of the 8th capacitor are all connected to the first of the rectification circuit
End, the second end of the 7th capacitor and the second end of the 8th capacitor are all connected to the 4th end of the rectification circuit.
7. the ac input circuit as described in claim 1-6 is any, which is characterized in that the ac input circuit further includes breaking
Road device, the input terminal of the breaker are connect with the ac input end, the output end of the breaker and the EMI filtered electrical
The input terminal on road connects.
8. the ac input circuit as described in claim 1-6 is any, which is characterized in that the ac input circuit further includes resistance
Burner, the input terminal of the flame-retardant device are connect with the input terminal of the EMI filter circuit, the output end of the flame-retardant device with it is described
The output end of EMI filter circuit connects.
9. the ac input circuit as described in claim 1-6 is any, which is characterized in that the ac input circuit further includes
One resistance, the first end of the first resistor are connect with the input terminal of the EMI filter circuit, the second end of the first resistor
It is connect with the output end of the EMI filter circuit.
10. a kind of air conditioner, which is characterized in that the air conditioner includes the exchange input electricity as described in claim 1-9 is any
Road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910716185.9A CN110401336A (en) | 2019-08-02 | 2019-08-02 | Ac input circuit and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910716185.9A CN110401336A (en) | 2019-08-02 | 2019-08-02 | Ac input circuit and air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110401336A true CN110401336A (en) | 2019-11-01 |
Family
ID=68327403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910716185.9A Pending CN110401336A (en) | 2019-08-02 | 2019-08-02 | Ac input circuit and air conditioner |
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| CN (1) | CN110401336A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023029605A1 (en) * | 2021-08-31 | 2023-03-09 | 合肥美的暖通设备有限公司 | Alternating-current input circuit, electric control box, air-conditioning outdoor unit and air conditioner |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110030119A (en) * | 2009-09-17 | 2011-03-23 | 삼성전기주식회사 | Power input circuit |
| CN102244469A (en) * | 2010-05-13 | 2011-11-16 | 鸿富锦精密工业（深圳）有限公司 | Switching power supply capable of suppressing current harmonic waves |
| CN104682691A (en) * | 2015-02-11 | 2015-06-03 | 上海广为焊接设备有限公司 | EMC solution for inverter welding machine |
| CN106026634A (en) * | 2016-07-22 | 2016-10-12 | 深圳创维－Rgb电子有限公司 | Anti-electromagnetic interference filtering circuit |
| CN109861198A (en) * | 2019-03-08 | 2019-06-07 | 广东美的制冷设备有限公司 | Fan power circuit, fan assembly and air conditioner |
| CN210129818U (en) * | 2019-08-02 | 2020-03-06 | 广东美的制冷设备有限公司 | Alternating current input circuit and air conditioner |
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| KR20110030119A (en) * | 2009-09-17 | 2011-03-23 | 삼성전기주식회사 | Power input circuit |
| CN102244469A (en) * | 2010-05-13 | 2011-11-16 | 鸿富锦精密工业（深圳）有限公司 | Switching power supply capable of suppressing current harmonic waves |
| CN104682691A (en) * | 2015-02-11 | 2015-06-03 | 上海广为焊接设备有限公司 | EMC solution for inverter welding machine |
| CN106026634A (en) * | 2016-07-22 | 2016-10-12 | 深圳创维－Rgb电子有限公司 | Anti-electromagnetic interference filtering circuit |
| CN109861198A (en) * | 2019-03-08 | 2019-06-07 | 广东美的制冷设备有限公司 | Fan power circuit, fan assembly and air conditioner |
| CN210129818U (en) * | 2019-08-02 | 2020-03-06 | 广东美的制冷设备有限公司 | Alternating current input circuit and air conditioner |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023029605A1 (en) * | 2021-08-31 | 2023-03-09 | 合肥美的暖通设备有限公司 | Alternating-current input circuit, electric control box, air-conditioning outdoor unit and air conditioner |
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