CN209267447U

CN209267447U - Electrically-controlled component and air conditioner

Info

Publication number: CN209267447U
Application number: CN201920180414.5U
Authority: CN
Inventors: 孙金田
Original assignee: Midea Group Co Ltd; Midea Group Wuhan Refrigeration Equipment Co Ltd
Current assignee: Midea Group Co Ltd; Midea Group Wuhan Refrigeration Equipment Co Ltd
Priority date: 2019-01-31
Filing date: 2019-01-31
Publication date: 2019-08-16
Anticipated expiration: 2029-01-31

Abstract

It includes: circuit board that the utility model, which discloses a kind of electrically-controlled component and air conditioner, the electrically-controlled component, is provided on circuit board with reference to ground；Pfc circuit is set on circuit board；Radiator is set on circuit board, and radiator is arranged close to pfc circuit, to radiate for pfc circuit；Isolation coupling circuit, is set on circuit board, and isolation coupling circuit is arranged close to pfc circuit, and one end of isolation coupling circuit is electrically connected with radiator, and the other end of isolation coupling circuit is electrically connected with the reference；Isolation coupling circuit, the EMC interference signal for generating radiator are coupled to the reference ground of circuit board.The utility model solves the problems, such as electrically-controlled component EMC serious interference.

Description

Electrically-controlled component and air conditioner

Technical field

The utility model relates to electronic control technology field, in particular to a kind of electrically-controlled component and air conditioner.

Background technique

In the electrical equipment that air conditioner, refrigerator etc. are equipped with frequency converter, it is typically provided with PFC, the circuits such as IPM, and this A little circuit elements can generate heat during the work time, if radiating not in time to it, it is more likely that will affect its in electric appliance His circuit element, such as the working performance of master controller.For this reason, it may be necessary to which the heater elements such as IPM cool down to PFC, guarantee it Reliability and service life.

In general, can radiator be set near the heater elements such as rectifier bridge, PFC and IPM to radiate, due to Safety requirement, metal heat sink needs hanging earth-free (high resistant over the ground), and the power component in rectifier bridge, PFC and IPM Electromagnetic radiation may be generated by metal heat sink, influence electrical equipment normal work.

Utility model content

The main purpose of the utility model is to propose a kind of electrically-controlled component and air conditioner, it is intended to it is dry to solve electrically-controlled component EMC Disturb serious problem.

To achieve the above object, the utility model proposes a kind of electrically-controlled component, the electrically-controlled component includes:

Circuit board is provided on the circuit board with reference to ground；

Pfc circuit is set on the circuit board；

Radiator is set on the circuit board, and the radiator is arranged close to the pfc circuit, for the PFC electricity It radiates on road；

Isolation coupling circuit is set on the circuit board, and the isolation coupling circuit is arranged close to the pfc circuit, One end of the isolation coupling circuit is electrically connected with the radiator, the other end of the isolation coupling circuit and the reference ground Electrical connection；The isolation coupling circuit, the EMC interference signal for generating the radiator are coupled to the ginseng of the circuit board Examine ground.

Optionally, the isolation coupling circuit includes first capacitor, one end of the first capacitor and radiator electricity Connection, the other end of the first capacitor are connect with the reference of the circuit board.

Optionally, the isolation coupling circuit further includes first resistor, and the first resistor is arranged in series in described first Between capacitor and the reference ground；

Alternatively, the first resistor is arranged in series between the radiator and the first capacitor.

Optionally, the capacity value range of the first capacitor is 150pF~10nF.

Optionally, the electrically-controlled component further includes IPM module, and the IPM module is arranged close to the radiator；It is described The power input of IPM module is connect with the output end of the pfc circuit.

Optionally, the electrically-controlled component further includes rectification circuit, and the rectification circuit is arranged close to the radiator, described The input terminal of rectification circuit accesses AC power source, and the output end of the rectification circuit is connect with the input terminal of the pfc circuit.

Optionally, the pfc circuit includes first switch tube, the first inductance, the second capacitor and first diode, and described One end of one inductance is connect with the input terminal of the rectification circuit, the other end and the first diode of first inductance The interconnection of one end of anode and the first switch tube；The cathode of the first diode is the output end of the pfc circuit, and with One end of second capacitor connects；The other end of second capacitor is grounded with the other end of the first switch tube；Institute The controlled end of first switch tube is stated for accessing switch control signal.

Optionally, the electrically-controlled component further includes absorbing buffer circuit, the absorption buffer circuit and the one or two pole Pipe is arranged in parallel, with the EMC interference signal for inhibiting the first diode to generate；

And/or the absorption buffer circuit is arranged in parallel with the first switch tube, to inhibit the first switch tube to produce Raw EMC interference signal.

Optionally, the electrically-controlled component further includes shutdown accelerating circuit, the shutdown accelerating circuit and the first switch The controlled end of pipe connects；

The shutdown accelerating circuit, for reducing the shutdown of the first switch tube in first switch tube shutdown Time, to improve the turn-off speed of the first switch tube.

The utility model also proposes a kind of air conditioner, including electrically-controlled component as described above；The electrically-controlled component includes: electricity Road plate is provided on the circuit board with reference to ground；Pfc circuit is set on the circuit board；Radiator is set to the electricity On the plate of road, the radiator is arranged close to the pfc circuit, to radiate for the pfc circuit；Isolation coupling circuit, if Be placed on the circuit board, the isolation coupling circuit is arranged close to the pfc circuit, one end of the isolation coupling circuit with The radiator electrical connection, the other end of the isolation coupling circuit are electrically connected with the reference；The isolation coupling circuit, EMC interference signal for generating the radiator is coupled to the reference ground of the circuit board.

The present embodiment is electrically connected by setting isolation coupling circuit, one end of isolation coupling circuit with radiator, and coupling is isolated The other end for closing circuit can be connect with the reference of the pfc circuit of setting on circuit boards.EMC interference signal in this way passes through Distribution capacity, radiator, isolation coupling circuit between pfc circuit and radiator are returned to reference to ground, namely return to EMC interference letter Number generating source, so as to avoid EMC interference signal stream from radiateing by radiator.EMC interference signal is being distributed simultaneously Capacitor, radiator, isolation coupling circuit and the circuit constituted with reference to ground are gradually consumed in the form of fever in flowing, to solve The problem of electrically-controlled component EMC serious interference of having determined.

Detailed description of the invention

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 functional block diagram of one embodiment of the utility model electrically-controlled component；

Fig. 2 is the electrical block diagram of one embodiment of the utility model electrically-controlled component.

Drawing reference numeral explanation:

Label	Title	Label	Title
				100	Circuit board	70	Turn off accelerating circuit
10	Pfc circuit	C1~C4	First capacitor~the 4th capacitor
				20	Radiator	R2~R6	Second resistance~the 6th resistance
30	Isolation coupling circuit	Q1	First switch tube
				40	Rectifier bridge	D1	First diode
50	IPM module	D2	Second diode
				60	Absorb buffer circuit	L1	First inductance

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 embodiment

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 Under every other embodiment obtained, fall within the protection scope of the utility model.

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

In addition, if relating to the description of " first ", " second " etc. in the utility model embodiment, " first ", " the 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.It in addition, the technical solution between each embodiment can be combined with each other, but must be with ordinary skill Based on personnel can be realized, this technical side will be understood that when the combination of technical solution appearance is conflicting or cannot achieve The combination of case is not present, also not within the protection scope of the requires of the utility model.

The utility model proposes a kind of electrically-controlled components, suitable for frequency converter, such as the laundry of frequency conversion type air conditioning, frequency conversion type In the electrical equipments such as machine, frequency conversion type refrigerator, it is particularly suitable for the integral types such as movable air conditioner, window air conditioner, dehumidifier humidifier In air conditioner.Below for convenience of understanding, in citing, it is illustrated for being applied to air-conditioning.

Referring to Fig.1, in an embodiment of the utility model, which includes:

Circuit board 100 is provided on the circuit board 100 with reference to ground GND；

Pfc circuit 10 is set on the circuit board 100；

Radiator 20 is set on the circuit board 100, and the radiator 20 is arranged close to the pfc circuit 10, with for The pfc circuit 10 radiates；

Isolation coupling circuit 30 is set on the circuit board 100, and the isolation coupling circuit 30 is close to the PFC electricity Road 10 is arranged, and one end of the isolation coupling circuit 30 is electrically connected with the radiator 20, the isolation coupling circuit 30 it is another One end is electrically connected with described with reference to ground GND；The isolation coupling circuit 30, the EMC interference for generating the radiator 20 Signal is coupled to the reference ground GND of the circuit board 100.

In the present embodiment, power input interface (AC-L, AC- for accessing AC power source are additionally provided on circuit board 100 N), and it is used for and external device (ED), such as communication interface that air conditioner indoor unit is communicated (not shown go out).On circuit board 100 It is additionally provided with the master controller (not shown go out) for carrying out data processing, is integrated with sequence controller, memory, number in master controller According to processor, and it is stored in the software program and/or module that can be run on the memory and on the data processor, Master controller is by operation or executes the software program and/or module that are stored in memory, and calls and be stored in memory Interior data, and communicated by the control unit of communication interface CN1 and indoor unit, the control that control unit is exported is believed Output is to pfc circuit 10 after number being converted to corresponding logic level signal, to drive pfc circuit 10 to work.The master controller can To be the microprocessors such as single-chip microcontroller, DSP.Rectification circuit is generally additionally provided on circuit board 100, rectification circuit can be rectifier bridge 40 heaps, or realized using the rectification circuit of four independent diode compositions.Rectification circuit turns the AC power source of access Output is to pfc circuit 10 after being changed to direct current, to carry out power factor (PF) adjustment.

Pfc circuit 10 can be realized using passive PFC circuit 10 or using active PFC circuit 10, pfc circuit 10 can To be boost PFC circuit 10 perhaps voltage-dropping type pfc circuit 10 or buck-boost type pfc circuit 10.Pfc circuit 10 it is controlled End is connect with the control terminal Ctrl of master controller, control of the pfc circuit 10 based on master controller, and the direct current of access is carried out Power factor (PF) adjustment, such as DC voltage is increased and is stablized in 380V, so that input current follows input voltage, guarantee straight The power factor (PF) in galvanic electricity source is 0.9 or more.DC power transmission adjusted is filtered to dc-link capacitance through dc-link capacitance After export to late-class circuit, such as IPM module 50.Direct current adjusted can also be generated various by switching power circuit The driving voltage of numerical value, such as generate the voltages such as 5V, 15V, for other components confessions such as master controllers on circuit board 100 Electricity.

In practical application, the paving copper setting of certain area can be carried out on circuit board 100, to be formed with reference to ground GND, This with reference to ground GND can for pfc circuit 10, rectifier bridge 40, IPM module 50 common reference ground GND, be also possible to each module Independent reference ground GND, can specifically be configured according to circuit requirements.

It should be noted that rectifier bridge 40, IPM module 50, pfc circuit 10, especially compressor IPM module 50 are working When general heating it is more serious, the heat that power device in circuit generates is higher, if radiating not in time, may pass through electricity Road plate 100 is conducted to master controller, so that nearly reaching identical temperature with master controller.And the ideal operation temperature of master controller Degree is less than power device mostly, thus the operating temperature of power device may cause master controller operating temperature it is excessively high and It breaks down, main controller is made to be easy the control signal of output error.Therefore, it will usually which metal is set on circuit board 100 Material, such as the radiator 20 of aluminium, copper material, radiator 20 pass through in screw, bolt, riveting, welding, clamping and inserting mode For one or more combination settings on electric-controlled plate, rectifier bridge 40, IPM module 50, the power device in pfc circuit 10 can be successively Held against heat sink 20 is arranged after arranging example, and radiator then can be set in the side of circuit board 100, good ventilation is realized, to mention The radiating efficiency of high-power components.And radiator 20 is due to safety requirement, radiator 20 needs hanging earth-free (high resistant over the ground), Pfc circuit 10, the power tube in IPM module 50 and there is distribution capacity mostly between metal heat sink 20, pfc circuit 10, Power tube in IPM module 50 is in the engineering of work, meeting quickly shutdown/conducting, to be easy to produce high dV/dt, di/ Dt causes the EMC interference signal of electric-controlled plate.The common mode interference signals such as these switching signals and harmonic wave are easy to pass through distribution capacity coupling It closes on metal heat sink 20, then passes through metal heat sink 20 and radiated to surrounding space and spread, affect the EMC of complete machine Energy.Certainly in other embodiments, isolation coupling circuit 30 can also be close to the reference ground GND setting of IPM module 50, by coupling The EMC interference signal being bonded on radiator 20 be coupled to reference to ground GND on, thus isolation coupling circuit 30, radiator 20, A low-impedance path is formed between pfc circuit 10 and reference ground GND.

To solve the above-mentioned problems, the present embodiment passes through setting isolation coupling circuit 30, one end of isolation coupling circuit 30 It is electrically connected with radiator 20, the other end of isolation coupling circuit 30 can be with the ginseng for the pfc circuit 10 being arranged on circuit board 100 Examine ground GND connection.In this way EMC interference signal by distribution capacity between pfc circuit 10 and radiator 20, radiator 20, every It returns to from coupling circuit 30 with reference to ground GND, namely returns to the generating source of EMC interference signal, so as to avoid EMC interference signal Stream is radiate by radiator 20.EMC interference signal is in distribution capacity, radiator 20, isolation coupling circuit 30 and ginseng simultaneously It examines and is gradually consumed in the form of fever in the circuit flowing that ground GND is constituted, to solve electrically-controlled component EMC serious interference Problem.

Referring to Figures 1 and 2, in one embodiment, the isolation coupling circuit 30 includes first capacitor C1, first electricity The one end for holding C1 is electrically connected with the radiator 20, the reference ground of the other end of the first capacitor C1 and the circuit board 100 GND connection.

In the present embodiment, first capacitor C1 can be specifications parameter capacitor corresponding with EMC interfering frequency, to make EMC interference signal is more easily by first capacitor C1.Optionally, the EMC of the specifications parameter of the first capacitor C1 and electric-controlled plate Interfering frequency is corresponding namely the resonance dot frequency of first capacitor C1 and the EMC interfering frequency of electric-controlled plate it is close or equal.Its In, the capacity of first capacitor C1 determines its resonance dot frequency, can be specifically configured according to EMC interfering frequency, such as can To be set as the capacitor of 150pF~10nF equal-specification.It in practical applications, can be by first capacitor C1 close to the ginseng of pfc circuit Ground GND setting is examined, to reduce the switching circuits such as active PFC and IPM module by 20 coupling path of metal heat sink to empty around Between generate radiation interference, improve complete machine EMC performance, reduce EMC and rectify and improve cost of parts.

In above-described embodiment, the isolation coupling circuit 30 further includes first resistor (not shown go out), the first resistor It is arranged in series between the first capacitor C1 and the reference ground GND；

Alternatively, the first resistor is arranged in series between the radiator 20 and the first capacitor C1.

In the present embodiment, by first resistor R1, the shape that the EMC interference signal for flowing through first resistor R1 can be generated heat Formula is gradually consumed, to accelerate the absorption of electromagnetic interference, avoids electric-controlled plate EMC interference exceeded.First resistor R1 can be with One capacitor C1 forms filter circuit, by can reduce first capacitor C1 and first resistor R1 series connection resonance signal impedance, having Conducive to the efficiency for improving the signal for inhibiting EMC interfering frequency resonance.

Referring to Figures 1 and 2, in one embodiment, the electrically-controlled component further includes IPM module 50, and the IPM module 50 is leaned on The nearly radiator 20 is arranged；The output end DC-out of the power input of the IPM module 50 and the pfc circuit 10 connects It connects.

In the present embodiment, which can be compressor IPM module 50, be also possible to blower IPM module 50, IPM Module 50 is integrated with driving circuit and multiple power switch tubes, multiple power switch tubes composition driving inverter circuits, such as can be with Three-phase inversion bridge circuit is formed by six power switch tubes, or forms two-phase inverter bridge circuit by four power switch tubes, It is worked so that the DC power supply of access is converted to output after AC power source to motor with driving motor.Wherein, each power switch tube It can be realized using metal-oxide-semiconductor or IGBT.IPM module 50 can be used for driving compressor electric motor or blower motor, exist certainly In other embodiments, IPM module 50 can be also used for driving the frequency converter and various inverters of other motors, and be applied to become Frequency modulation is fast, metallurgical machinery, electric propulsion, in the fields such as frequency-conversion domestic electric appliances such as servo-drive and air-conditioning.

In above-described embodiment, isolation coupling circuit 30 also can be set in radiator 20 and IPM module 50 with reference to ground GND it Between, it couples the EMC interference signal that power switch tube in IPM module 50 generates to reference to ground GND.It is understood that every It can be set to one from coupling circuit 30, may be set to be multiple, can be specifically configured according to circuit requirements, herein With no restrictions.

Referring to Fig. 2, in one embodiment, the pfc circuit 10 includes first switch tube Q1, the first inductance L1, the second electricity Hold C2 and first diode D1, one end of the first inductance L1 are connect with the input terminal of the rectification circuit, first electricity The one end for feeling the other end of L1 and the anode of the first diode D1 and the first switch tube Q1 interconnects；One or two pole The cathode of pipe D1 is the output end DC-out of the pfc circuit 10, and connect with one end of the second capacitor C2；Described second The other end of capacitor C2 and the other end of the first switch tube Q1 are grounded；The controlled end of the first switch tube Q1 is for connecing Enter switch control signal.

In the present embodiment, first switch tube Q1 is PFC control switch, and PFC control switch can be using metal-oxide-semiconductor, IGBT etc. Switching tube realizes that the present embodiment preferably uses IGBT to realize, first switch tube Q1, the first inductance L1, the second capacitor C2 and First diode D1 constitutes boost boost PFC circuit 10, to carry out Active PFC to access direct current.

In first switch tube Q1 using IGBT to realize when, be also arranged in parallel between the collector and grid of IGBT fast Quick-recovery freewheeling diode FRD.In first switch tube Q1 using metal-oxide-semiconductor to realize when, between the source electrode and drain electrode of metal-oxide-semiconductor also simultaneously Connection is provided with Schottky barrier diode.

In Design PCB plate, first capacitor C1 can be arranged close to the reference ground GND of pfc circuit 10 namely close The emitter of IGBT is arranged, to reduce the absorption path for the electromagnetic interference that the coupling of metal heat sink 20 generates.

Referring to Fig. 2, in some embodiments, pfc circuit 10 further includes second resistance R2 and 3rd resistor R3, second resistance R2 is arranged in series between master controller and the controlled end of first switch tube Q1, one end of 3rd resistor R3 and second resistance R2 and The controlled end of first switch tube Q1 interconnects, and the other end of 3rd resistor R3 is connect with described with reference to ground electricity GND.Second resistance R2 and 3rd resistor R3 composition series connection bleeder circuit, the control signal that will be accessed are exported to the controlled end of first switch tube Q1, thus Control first switch tube Q1 ON/OFF.

Further, pfc circuit 10 further includes zener diode ZD1, and zener diode ZD1 is arranged in parallel in for first The controlled end of switching tube Q1 and with reference between ground GND damages for avoiding exporting excessive to the voltage of first switch tube Q1 One switching tube Q1.

Referring to Fig. 2, in one embodiment, the electrically-controlled component further includes absorbing buffer circuit 60B, the absorption buffering electricity Road 60B is arranged in parallel with the first diode D1, with the EMC interference signal for inhibiting the first diode D1 to generate；

And/or the absorption buffer circuit 60A and first switch tube Q1 is arranged in parallel, to inhibit described first to open Close the EMC interference signal that pipe Q1 is generated.

In the present embodiment, by setting absorb buffer circuit (60A, 60B), with first switch tube Q1 shutdown when, due to There are drain-source parasitic capacitances for the drain-source interpolar of lower first switch tube Q1, so that the voltage at drain-source both ends increases and generates spike arteries and veins Punching, and when the voltage value of the spike is more than the conduction threshold of first switch tube Q1, on the first switch tube Q1 Voltage is discharged, and be may cause first switch tube Q1 to avoid due to voltage spikes and is opened by mistake what logical or breakdown grid oxide layer damaged Problem.

In above-described embodiment, absorbing buffer circuit (60A, 60B) includes third capacitor C3, the 4th capacitor C4, the 4th resistance The spike that R4 and the 5th resistance R5, third capacitor C3 and the pairs of first switch tube Q1 of the 4th resistance R4 group are generated is absorbed Absorption buffer circuit 60A, the 4th capacitor C4 and the spike that generates of the pairs of first diode D1 of the 5th resistance R5 group carry out The absorption buffer circuit 60B of absorption.

Referring to Fig. 2, in one embodiment, the electrically-controlled component further includes shutdown accelerating circuit 70, and the shutdown accelerates electricity Road 70 is connect with the controlled end of the first switch tube Q1；

The shutdown accelerating circuit 70, for reducing the first switch tube Q1 in first switch tube Q1 shutdown Turn-off time, to improve the turn-off speed of the first switch tube Q1.

In the present embodiment, shutdown accelerating circuit 70 can be realized using the 6th resistance R6 and the second diode D2, in master When the control signal of controller output is high level, the second diode D2 reversely ends, and exports low level control in master controller Signal processed, the second diode D2 forward conduction, the 3rd resistor R3 of the 6th resistance R6 and first switch tube Q1 controlled end is simultaneously at this time Connection setting, so as to reduce the resistance value of first switch tube Q1 controlled end, not work in first switch tube Q1 conducting, the When one switching tube Q1 is turned off, back discharge is carried out, to provide negative voltage to first switch tube Q1, accelerates first switch tube Q1 Turn-off speed.

The utility model also proposes that a kind of air conditioner includes electrically-controlled component as described above.The detailed construction of the electrically-controlled component It can refer to above-described embodiment, details are not described herein again；It is understood that above-mentioned due to having been used in the utility model air conditioner Electrically-controlled component, therefore, the embodiment of the utility model air conditioner include whole technical sides of above-mentioned electrically-controlled component whole embodiments Case, and technical effect achieved is also identical, details are not described herein.

In the present embodiment, air conditioner may include indoor unit and outdoor unit, which can be installed on air conditioner In outdoor unit, the mounting portion for installing the electrically-controlled component is provided in the casing of outdoor unit, electrically-controlled component can pass through spiral shell One or more combination settings are in the mounting portion of outdoor unit in nail, bolt, riveting, welding, clamping and inserting mode.

The foregoing is merely the alternative embodiments of the utility model, and therefore it does not limit the scope of the patent of the utility model, Under all utility models in the utility model are 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

1. a kind of electrically-controlled component, which is characterized in that the electrically-controlled component includes:

Circuit board is provided on the circuit board with reference to ground；

Pfc circuit is set on the circuit board；

Radiator is set on the circuit board, and the radiator is arranged close to the pfc circuit, with for the pfc circuit into Row heat dissipation；

Isolation coupling circuit is set on the circuit board, and the isolation coupling circuit is arranged close to the pfc circuit, described One end of isolation coupling circuit is electrically connected with the radiator, and the other end of the isolation coupling circuit is electrically connected with the reference It connects；The isolation coupling circuit, the EMC interference signal for generating the radiator are coupled to the reference of the circuit board Ground.

2. electrically-controlled component as described in claim 1, which is characterized in that the isolation coupling circuit includes first capacitor, described One end of first capacitor is electrically connected with the radiator, and the reference ground of the other end of the first capacitor and the circuit board is even It connects.

3. electrically-controlled component as claimed in claim 2, which is characterized in that the isolation coupling circuit further includes first resistor, institute First resistor is stated to be arranged in series between the first capacitor and the reference ground；

4. electrically-controlled component as claimed in claim 2, which is characterized in that the capacity value range of the first capacitor is 150pF ~10nF.

5. electrically-controlled component as described in claim 1, which is characterized in that the electrically-controlled component further includes IPM module, the IPM Module is arranged close to the radiator；The power input of the IPM module is connect with the output end of the pfc circuit.

6. electrically-controlled component as described in claim 1, which is characterized in that the electrically-controlled component further includes rectification circuit, described whole Current circuit is arranged close to the radiator, and the input terminal of the rectification circuit accesses AC power source, the output of the rectification circuit End is connect with the input terminal of the pfc circuit.

7. electrically-controlled component as claimed in claim 6, which is characterized in that the pfc circuit includes first switch tube, the first electricity Sense, the second capacitor and first diode, one end of first inductance are connect with the input terminal of the rectification circuit, and described first One end of the anode and the first switch tube of the other end of inductance and the first diode interconnects；The first diode Cathode is the output end of the pfc circuit, and connect with one end of second capacitor；The other end of second capacitor and institute The other end for stating first switch tube is grounded；The controlled end of the first switch tube is for accessing switch control signal.

8. electrically-controlled component as claimed in claim 7, which is characterized in that the electrically-controlled component further includes absorbing buffer circuit, institute It states absorption buffer circuit to be arranged in parallel with the first diode, with the EMC interference signal for inhibiting the first diode to generate；

And/or the absorption buffer circuit is arranged in parallel with the first switch tube, to inhibit the first switch tube to generate EMC interference signal.

9. electrically-controlled component as claimed in claim 7, which is characterized in that the electrically-controlled component further includes shutdown accelerating circuit, institute Shutdown accelerating circuit is stated to connect with the controlled end of the first switch tube；

The shutdown accelerating circuit, for reducing the turn-off time of the first switch tube in first switch tube shutdown, To improve the turn-off speed of the first switch tube.

10. a kind of air conditioner, which is characterized in that including electrically-controlled component as claimed in any one of claims 1 to 9.