CN207184332U - Air conditioner variable frequency drive and air conditioner - Google Patents
Air conditioner variable frequency drive and air conditioner Download PDFInfo
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- CN207184332U CN207184332U CN201720823294.7U CN201720823294U CN207184332U CN 207184332 U CN207184332 U CN 207184332U CN 201720823294 U CN201720823294 U CN 201720823294U CN 207184332 U CN207184332 U CN 207184332U
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- 238000012360 testing method Methods 0.000 claims abstract description 23
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- 238000010586 diagram Methods 0.000 description 14
- 239000003990 capacitor Substances 0.000 description 11
- 230000005611 electricity Effects 0.000 description 8
- 238000001914 filtration Methods 0.000 description 3
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- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
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Abstract
The utility model discloses a kind of air conditioner variable frequency drive and air conditioner, the air conditioner variable frequency drive includes rectifier bridge, double relay start-up circuit unit, filter circuit unit, inverter circuit unit, discharge circuit unit, the first diode circuit unit and the second diode circuit unit；The first end of discharge circuit unit and the cathode output end of rectifier bridge connect, and second end the second diode circuit unit of discharge circuit unit and the cathode output end of rectifier bridge connect；First diode circuit unit is connected between the cathode output end of rectifier bridge and the first end of double relay start-up circuit unit；Second end of double relay start-up circuit unit is connected with the electrode input end of the first end of filter circuit unit and inverter circuit unit；Second end of filter circuit unit and the connection of the cathode output end of the negative input of inverter circuit unit and rectifier bridge.The utility model is avoided that damage rectifier bridge when air conditioner carries out production voltage-withstand test.
Description
Technical field
It the utility model is related to electronic technology field, more particularly to a kind of air conditioner variable frequency drive and air conditioner.
Background technology
Air conditioner needs to carry out it multinomial test after the completion of production, and one of which test is exactly that voltage-withstand test (is also referred to as
Electrical insulation strength is tested), the voltage-withstand test of air conditioner is that a default AC or DC high pressure is applied into the powered of air conditioner
Between part and uncharged part (i.e. air conditioner casing), to detect the voltage endurance capability that the insulating materials of air conditioner can bear.
Air conditioner will not only bear the effect of rated operational voltage in long-term work, still suffer from causing the short time in operating process
Higher than rated operational voltage overvoltage act on (overvoltage is likely to be greater than several times of rated operational voltage value), because
This, the voltage-withstand test after the completion of air conditioner production is the electrical safety performance for examining air conditioner under actual working state,
The resistance to pressure of air conditioner is also one of important indicator of electrical security for examining air conditioner.
However, air conditioner variable frequency drive of the prior art is generally all not provided with discharge circuit, cause to air-conditioning
The rectifier bridge that device carries out during production voltage-withstand test in circuit is in vacant state, so that rectifier bridge is easily damaged because of overvoltage
It is bad；Also, air conditioner variable frequency drive of the prior art is also not provided with rectifier bridge reverse-connection protection circuit so that works as rectifier bridge
Rectifier bridge can be damaged during reversal connection.
Utility model content
Main purpose of the present utility model is to provide a kind of air conditioner variable frequency drive, it is intended to avoids entering air conditioner
Row production voltage-withstand test when damage circuit in rectifier bridge and avoid damaging rectifier bridge during rectifier bridge reversal connection.
To achieve these goals, the utility model provides a kind of air conditioner variable frequency drive, the air conditioner frequency conversion
Drive circuit include rectifier bridge, double relay start-up circuit unit, filter circuit unit, inverter circuit unit, for the sky
Device is adjusted to carry out the discharge circuit unit, anti-for the rectifier bridge of repid discharge when carrying out production voltage-withstand test to the rectifier bridge
The first diode circuit unit of the pressure-resistant protection of surge is carried out and for described to the cathode output end of the rectifier bridge when connecing
The second diode circuit unit of the pressure-resistant protection of surge is carried out to the cathode output end of the rectifier bridge during rectifier bridge reversal connection；Its
In：
The first end of the discharge circuit unit is connected with the cathode output end of the rectifier bridge, the discharge circuit unit
The second end be connected through the second diode circuit unit with the cathode output end of the rectifier bridge；The first diode electricity
Road unit is connected between the cathode output end of the rectifier bridge and the first end of the double relay start-up circuit unit；It is described
Second end of double relay start-up circuit the unit first end with the filter circuit unit and the inverter circuit unit respectively
Electrode input end connection；The negative input of second end of the filter circuit unit and the inverter circuit unit is and institute
State the cathode output end connection of rectifier bridge.
Preferably, the discharge circuit unit includes first resistor and the first electric capacity；Wherein：
The first end of the first resistor is connected with the cathode output end of the rectifier bridge, the second end of the first resistor
It is connected through the second diode circuit unit with the cathode output end of the rectifier bridge, first electric capacity and the described first electricity
Resistance is in parallel.
Preferably, the first diode circuit unit includes the first diode, the anode of first diode and institute
State the cathode output end connection of rectifier bridge, the negative electrode of first diode and the first of the double relay start-up circuit unit
End connection.
Preferably, the second diode circuit unit includes the second diode, and the anode of second diode is with putting
The second end connection of first resistor described in electric circuit unit, the negative pole of the negative electrode and the rectifier bridge of second diode are defeated
Go out end connection connection.
Preferably, the double relay start-up circuit unit includes the first relay, the second relay and second resistance；Its
In：
The first end of first relay is connected with the negative electrode of first diode, and the second of first relay
End is connected with the first end of the second resistance, the second end of the second resistance respectively with the filter circuit unit first
The connection of the electrode input end of end and the inverter circuit unit；The first end of second relay and first diode
Negative electrode connects, the second end of second relay first end with the filter circuit unit and the inverter circuit list respectively
The electrode input end connection of member.
In addition, to achieve the above object, the utility model also provides a kind of air conditioner variable frequency drive, the air conditioner
Variable frequency drive include rectifier bridge, single start relay circuit unit, filter circuit unit, inverter circuit unit, for institute
State and carry out the discharge circuit unit of repid discharge when air conditioner carries out production voltage-withstand test to the rectifier bridge, for the rectification
The first diode circuit unit of the pressure-resistant protection of surge is carried out to the cathode output end of the rectifier bridge during bridge reversal connection and is used for
The second diode circuit unit of the pressure-resistant protection of surge is carried out to the cathode output end of the rectifier bridge during rectifier bridge reversal connection；
Wherein：
The first end of single start relay circuit unit is connected with the cathode output end of the rectifier bridge, the Dan Ji
Second end of appliance starting the circuit unit first end with the discharge circuit unit, the first of the filter circuit unit respectively
The connection of the electrode input end of end and the inverter circuit unit；Second end of the discharge circuit unit is through second diode
Circuit unit is connected with the cathode output end of the rectifier bridge；The first diode circuit unit starts with single relay
Circuit unit connects；The negative input of second end of the filter circuit unit and the inverter circuit unit with it is described whole
Flow the cathode output end connection of bridge.
Preferably, the discharge circuit unit includes first resistor and the first electric capacity；Wherein：
The first end of the first resistor is connected with the second end of single start relay circuit unit, first electricity
Resistance the second end be connected through the second diode circuit unit with the cathode output end of the rectifier bridge, first electric capacity and
The first resistor is in parallel.
Preferably, single start relay circuit unit includes the first relay and second resistance；Wherein：
The first end of first relay is connected with the cathode output end of the rectifier bridge, and the of first relay
Two ends respectively with the first end of first resistor described in the discharge circuit unit, the first end of the filter circuit unit and institute
State the electrode input end connection of inverter circuit unit；The first end of the second resistance and the first end of first relay connect
Connect, the second end of the second resistance is connected through the first diode circuit unit with the second end of first relay.
Preferably, the first diode circuit unit includes the first diode, the anode of first diode and institute
State the second end connection of second resistance described in single start relay circuit unit, the negative electrode of first diode and described the
The second end connection of one relay.
Preferably, the second diode circuit unit includes the second diode, and the anode of second diode is with putting
The second end connection of first resistor described in electric circuit unit, the negative pole of the negative electrode and the rectifier bridge of second diode are defeated
Go out end connection connection.
In addition, to achieve the above object, the utility model also provides a kind of air conditioner, the air conditioner includes as described above
Air conditioner variable frequency drive.
The utility model provides a kind of air conditioner variable frequency drive, the air conditioner variable frequency drive include rectifier bridge,
Double relay start-up circuit unit, filter circuit unit, inverter circuit unit, for the air conditioner carry out production voltage-withstand test
When to the rectifier bridge carry out repid discharge discharge circuit unit, for the rectifier bridge reversal connection when to the rectifier bridge just
Pole output end carries out the first diode circuit unit of the pressure-resistant protection of surge and during for the rectifier bridge reversal connection to described whole
The cathode output end for flowing bridge carries out the second diode circuit unit of the pressure-resistant protection of surge；The first end of the discharge circuit unit
It is connected with the cathode output end of the rectifier bridge, the second end of the discharge circuit unit is through the second diode circuit unit
It is connected with the cathode output end of the rectifier bridge；The first diode circuit unit is connected to the positive pole output of the rectifier bridge
Between end and the first end of the double relay start-up circuit unit；The second end difference of the double relay start-up circuit unit
It is connected with the first end of the filter circuit unit and the electrode input end of the inverter circuit unit；The filter circuit unit
The second end and cathode output end of the negative input with the rectifier bridge of the inverter circuit unit be connected.This practicality is new
Type can avoid damaging the rectifier bridge when carrying out production voltage-withstand test to air conditioner；Meanwhile the utility model is also avoided that
Cause the damage of the rectifier bridge during rectifier bridge reversal connection.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to the structure shown in these accompanying drawings.
Fig. 1 is the electrical block diagram of the utility model air conditioner variable frequency drive first embodiment；
Fig. 2 is the electrical block diagram of the utility model air conditioner variable frequency drive second embodiment；
Fig. 3 is born by rectifier bridge upper and lower bridge arm diode in the embodiment of air conditioner variable frequency drive one in the prior art
Back-pressure and the rectifier bridge input and output voltage waveform diagram；
Fig. 4 is born by rectifier bridge upper and lower bridge arm diode in the embodiment of the utility model air conditioner variable frequency drive one
Back-pressure and the rectifier bridge input and output voltage waveform diagram.
Realization, functional characteristics and the advantage of the utility model purpose will be described further referring to the drawings in conjunction with the embodiments.
Embodiment
It should be appreciated that specific embodiment described herein is not used to limit this only to explain the utility model
Utility model.
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only part of the embodiment of the present utility model, rather than all
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, belong to the scope of the utility model protection.
If it is to be appreciated that the description for being related to " first ", " second " etc. in the utility model be only used for describe purpose, without
It is understood that to indicate or implying its relative importance or the implicit quantity for indicating indicated technical characteristic.Thus, define
At least one this feature can be expressed or be implicitly included to the feature of " first ", " second ".In addition, between each embodiment
Technical scheme can be combined with each other, but must can be implemented as basis with those of ordinary skill in the art, work as technical scheme
Combination occur conflicting or will be understood that the combination of this technical scheme is not present when can not realize, also not in this practicality newly
Within the protection domain of type requirement.
The utility model provides a kind of air conditioner variable frequency drive, reference picture 1, and Fig. 1 becomes for the utility model air conditioner
The electrical block diagram of frequency drive circuit first embodiment.In the present embodiment, the air conditioner variable frequency drive includes first
Cross streams input L1, the second cross streams input L2, third phase ac input end L3, rectifier bridge 101, double relay start electricity
Road unit 102, filter circuit unit 103, inverter circuit unit 104, motor 105, discharge circuit unit 106, the first diode
The diode circuit unit 108 of circuit unit 107 and second.
Wherein, the first cross streams input L1, the second cross streams input L2 and third phase ac input end L3 are used
In input three-phase alternating-current supply；
The rectifier bridge 101, for the three-phase alternating-current supply to be converted into dc source；
The double relay start-up circuit unit 102, for controlling whether the dc source is exported to inversion electricity
Road unit 104, to control whether the inverter circuit unit 104 works；
The filter circuit unit 103, the dc source for being exported to the rectifier bridge 101 are filtered place
Reason；
The inverter circuit unit 104, for entering to the dc source after the filtering process of filter circuit unit 103
Row inversion is handled, and operating voltage is provided for the motor 105；
The discharge circuit unit 106, the rectifier bridge 101 is entered when carrying out production voltage-withstand test for the air conditioner
Row repid discharge；
The first diode circuit unit 107, during for 101 reversal connection of rectifier bridge to the rectifier bridge 101 just
Pole output end bp carries out the pressure-resistant protection of surge；
The second diode circuit unit 108, to the negative pole of the rectifier bridge 101 during for 101 reversal connection of rectification
Output end bm carries out the pressure-resistant protection of surge.
Specifically, in the present embodiment, the first end of the discharge circuit unit 106 and the positive pole of the rectifier bridge 101 are defeated
Go out to hold bp to connect, the second end of the discharge circuit unit 106 is through the second diode circuit unit 108 and the rectifier bridge
101 cathode output end bm connections；The first diode circuit unit 107 is connected to the positive pole output of the rectifier bridge 101
Hold between bp and the first end of the double relay start-up circuit unit 102, wherein, the first diode circuit unit 107
First end be connected with the cathode output end bp of the rectifier bridge 101, the second end of the first diode circuit unit 107 with
The first end connection of the double relay start-up circuit unit 102；Second end of the double relay start-up circuit unit 102 point
It is not connected with the first end of the filter circuit unit 103 and the electrode input end of the inverter circuit unit 104；The filtering
The negative input of second end of circuit unit 103 and the inverter circuit unit 104 is defeated with the negative pole of the rectifier bridge 101
Go out to hold bm to connect；The output end of the inverter circuit unit 104 is connected with the motor 105.
It is understood that in the present embodiment, the model of the rectifier bridge 101 can be set according to actual conditions.
Preferably, in the present embodiment, the model MDS30B or MDS60B of the rectifier bridge 101.
In the present embodiment, the discharge circuit unit 106 includes first resistor R1 and the first electric capacity C1.Wherein, described
One resistance R1 first end is connected with the cathode output end bp of the rectifier bridge 101, and the second end of the first resistor R1 is through institute
The cathode output end bm that the second diode circuit unit 108 is stated with the rectifier bridge 101 is connected, the first electric capacity C1 with it is described
First resistor R1 is in parallel.
In the present embodiment, the first diode circuit unit 107 includes the first diode D1, the first diode D1
Anode be connected with the cathode output end bp of the rectifier bridge 101, the negative electrode of the first diode D1 and the double relay
The first end connection of start-up circuit unit 102.
In the present embodiment, the second diode circuit unit 108 includes the second diode D2, the second diode D2
Anode be connected with the second end of first resistor R1 described in discharge circuit unit 106, the negative electrode of the second diode D2 with
The cathode output end bm connections connection of the rectifier bridge 101.
In the present embodiment, the double relay start-up circuit unit 102 includes the first relay 1021, the second relay
1022 and second resistance R2.Wherein, in the first end of first relay 1021 and the first diode circuit unit 107
The first diode D1 negative electrode connection, the second end of the first relay D1 and the first end of the second resistance R2
Connection, the second end of the second resistance R2 first end with the filter circuit unit 103 and the inverter circuit list respectively
The electrode input end connection of member 104；In the first end of second relay 1022 and the first diode circuit unit 107
The first diode D1 negative electrode connection, the second end of second relay 1022 respectively with the filter circuit unit
The electrode input end of 103 first end and the inverter circuit unit 104 connects.
In the present embodiment, the filter circuit unit 103 includes the first electrochemical capacitor E1 and the second electrochemical capacitor E2.Its
In, the positive pole of the first electrochemical capacitor E1 and the second electrochemical capacitor E2 positive pole with the double relay start-up circuit
The second end connection of the second resistance R2 in unit 102, the negative pole of the first electrochemical capacitor E1 and second electrolysis
Cathode output end bm of the electric capacity E2 negative pole with the rectifier bridge 101 is connected.
The discharge circuit unit 106, first diode circuit in the present embodiment air conditioner variable frequency drive
The operation principle of unit 107 and the second diode circuit unit 108 is described in detail below：The discharge circuit unit 106
In the first resistor R1 be voltage bleeder resistance, when carrying out production voltage-withstand test to air conditioner, the first resistor R1
Can be released voltage between the cathode output end bp and cathode output end bmbm of the rectifier bridge 101；Also, in the present embodiment,
The first electric capacity C1 play absorb peak voltage and accelerate release the rectifier bridge 101 cathode output end bp and negative pole output
The effect of voltage between the bmbm of end.Therefore, when carrying out production voltage-withstand test to air conditioner, the electric discharge electricity in the present embodiment
Road unit 106 can carry out quick to the voltage between the cathode output end bp and cathode output end bmbm of the rectifier bridge 101
Electric discharge, so as to significantly reduce forward and reverse voltage peak of each diode of upper and lower bridge arm in the rectifier bridge 101, effectively
The upper and lower bridge arm of the rectifier bridge 101 risk breakdown because of surge during the voltage-withstand test is avoided, that is, is avoided
The rectifier bridge 101 is damaged in the voltage-withstand test.Meanwhile in the present embodiment, the first diode circuit unit
The second diode D2 in the first diode D1 and the second diode circuit unit 108 in 107 can be
The pressure-resistant protection of surge is carried out to the rectifier bridge 101 during 101 reversal connection of rectifier bridge, so as to avoid the reversal connection of rectifier bridge 101
When damage the rectifier bridge 101, and damage the inverter circuit unit 104 when being avoided that 101 reversal connection of rectifier bridge, and then
Improve the stability and reliability of the present embodiment air conditioner variable frequency drive.
In addition, it is necessary to explanation, in the present embodiment, the first resistor R1's in the discharge circuit unit 106
Resistance size should meet the maximum voltage requirement for the dc source that the rectifier bridge 101 exports, and also meet described whole
Forward and reverse resistance to pressure request of bridge 101 is flowed, while also to take into account the efficiency requirements of circuit, i.e., described first resistor R1 resistance needs
Set according to actual conditions situation, in the present embodiment, the Standard resistance range of the first resistor R1 is more than or equal to 1M Ω
And it is less than or equal to 2.5M Ω.
Fig. 3 is born by rectifier bridge upper and lower bridge arm diode in the embodiment of air conditioner variable frequency drive one in the prior art
Back-pressure and the rectifier bridge input and output voltage waveform diagram, reference picture 3, waveform A1 is that prior art is hollow in figure
The back-pressure waveform diagram for adjusting the lower bridge arm diode of rectifier bridge in the embodiment of device variable frequency drive one to be born, waveform B 1 are
The back-pressure waveform that the upper bridge arm diode of rectifier bridge is born in the embodiment of air conditioner variable frequency drive one in the prior art shows
It is intended to, waveform C1 is the waveform of the output voltage of rectifier bridge described in the embodiment of air conditioner variable frequency drive one in the prior art
Schematic diagram, waveform D1 are the ripple of the input voltage of rectifier bridge described in the embodiment of air conditioner variable frequency drive one in the prior art
Shape schematic diagram.From figure 3, it can be seen that waveform A1 and the voltage peak of waveform B 1 are 2928.5V, i.e., the upper bridge of described rectifier bridge
The voltage peak for the back-pressure that arm diode and lower bridge arm diode are born is 2928.5V, and waveform C1 voltage peak is
2793.5V, i.e., the voltage peak of the output voltage of described rectifier bridge is 2793.5V, and waveform D1 voltage peak is 1767.5V,
The voltage peak of the input voltage of i.e. described rectifier bridge is 1767.5V, but regardless of be using model MDS30B rectifier bridge also
It is the rectifier bridge using model MDS60B, it is 2500V that the highest insulation of rectifier bridge is pressure-resistant, therefore, sky of the prior art
Device variable frequency drive is adjusted the risk of damage rectifier bridge to be present when carrying out air conditioner production voltage-withstand test.
Fig. 4 is born by rectifier bridge upper and lower bridge arm diode in the embodiment of the utility model air conditioner variable frequency drive one
Back-pressure and the rectifier bridge input and output voltage waveform diagram, reference picture 4, waveform A2 is that the utility model is empty in figure
The back-pressure waveform diagram for adjusting the lower bridge arm diode of rectifier bridge in the embodiment of device variable frequency drive one to be born, waveform B 2 are
The back-pressure waveform that the upper bridge arm diode of rectifier bridge is born in the embodiment of the utility model air conditioner variable frequency drive one shows
It is intended to, waveform C2 is the waveform of the output voltage of rectifier bridge described in the embodiment of the utility model air conditioner variable frequency drive one
Schematic diagram, waveform D2 are the ripple of the input voltage of rectifier bridge described in the embodiment of the utility model air conditioner variable frequency drive one
Shape schematic diagram.From fig. 4, it can be seen that waveform A2 peak voltage value is 2025.4V, waveform A2 peak voltage value for-
1274.4V, i.e., the back-pressure voltage peak that the lower bridge arm diode of described rectifier bridge is born is 2025.4V, the rectifier bridge
The malleation voltage peak that is born of upper bridge arm diode be 1274.4V；The peak voltage value of waveform B 2 is 2031.7V, ripple
Shape B2 peak voltage value is -1264.8V, i.e., the voltage peak for the back-pressure that the upper bridge arm diode of described rectifier bridge is born is equal
For 2031.7V, the voltage peak for the malleation that the upper bridge arm diode of the rectifier bridge is born is 1264.8V；Waveform C2's
Voltage peak is 760.57V, i.e., the voltage peak of the output voltage of described rectifier bridge is 760.57V；Waveform D2 voltage peak
For 1767.5V, i.e., the voltage peak of the input voltage of described rectifier bridge is 1767.5V.I.e. in the present embodiment, the rectifier bridge
The positive peak of back veltage that upper bridge arm diode and lower bridge arm diode are born close to the rectifier bridge input voltage voltage
Peak value 1767.5V, puncture the rectifier bridge when carrying out production voltage-withstand test to air conditioner so as to avoid.
The utility model air conditioner variable frequency drive can avoid damaging when carrying out production voltage-withstand test to air conditioner
The rectifier bridge, while cause the rectification when utility model air conditioner variable frequency drive is also avoided that the rectifier bridge reversal connection
The damage of bridge, so as to improve the stability and reliability of utility model air conditioner variable frequency drive.
Reference picture 2, Fig. 2 are the electrical block diagram of the utility model air conditioner variable frequency drive second embodiment.
In the present embodiment, the air conditioner variable frequency drive includes the first cross streams input L01, the second cross streams input L02, the
Three-phase alternating current input L03, rectifier bridge 201, single start relay circuit unit 202, filter circuit unit 203, inverter circuit
Unit 204, motor 205, discharge circuit unit 206, the first diode circuit unit 207 and the second diode circuit unit 208.
Wherein, the first cross streams input L01, the second cross streams input L02 and third phase ac input end L03
For inputting three-phase alternating-current supply；
The rectifier bridge 201, for the three-phase alternating-current supply to be converted into dc source；
Single start relay circuit unit 202, for controlling whether the dc source is exported to inversion electricity
Road unit 204, to control whether the inverter circuit unit 204 works；
The filter circuit unit 203, the dc source for being exported to the rectifier bridge 201 are filtered place
Reason；
The inverter circuit unit 204, for entering to the dc source after the filtering process of filter circuit unit 203
Row inversion is handled, and operating voltage is provided for the motor 205；
The discharge circuit unit 206, the rectifier bridge 201 is entered when carrying out production voltage-withstand test for the air conditioner
Row repid discharge；
The first diode circuit unit 207, during for 201 reversal connection of rectifier bridge to the rectifier bridge 201 just
Pole output end bp1 carries out the pressure-resistant protection of surge；
The second diode circuit unit 208, to the negative pole of the rectifier bridge 201 during for 201 reversal connection of rectification
Output end bm1 carries out the pressure-resistant protection of surge.
Specifically, in the present embodiment, first end and the rectifier bridge 201 of single start relay circuit unit 202
Cathode output end bp1 connections, the second end of single start relay circuit unit 202 respectively with the discharge circuit unit
The electrode input end connection of 206 first end, the first end of the filter circuit unit 203 and the inverter circuit unit 204；
Negative pole of second end of the discharge circuit unit 206 through the second diode circuit unit 208 and the rectifier bridge 201 is defeated
Go out to hold bm1 to connect；The first diode circuit unit 207 is connected with single start relay circuit unit 202；The filter
Negative pole of the negative input of second end of wave circuit unit 203 and the inverter circuit unit 204 with the rectifier bridge 201
Output end bm1 connections.
In the present embodiment, the discharge circuit unit 206 includes first resistor R01 and the first electric capacity C01.Wherein, it is described
First resistor R01 first end is connected with the second end of single start relay circuit unit 202, the first resistor R01
The second end be connected through the second diode circuit unit 208 with the cathode output end bm1 of the rectifier bridge 201, described
One electric capacity C01 is in parallel with the first resistor R01.
In the present embodiment, single start relay circuit unit 202 includes the first relay 2021 and second resistance
R02.Wherein, the first end of first relay 2021 is connected with the cathode output end bp1 of the rectifier bridge 201, and described
Second end of one relay 2021 respectively with first resistor R01 first end, the filter described in the discharge circuit unit 206
The electrode input end of the first end of wave circuit unit 203 and the inverter circuit unit 204 connects；The second resistance R02's
First end is connected with the first end of first relay 2021, and the second end of the second resistance R02 is through the one or two pole
Pipe circuit unit 207 is connected with the second end of first relay 2021.
In the present embodiment, the first diode circuit unit 207 includes the first diode D01, first diode
D01 anode is connected with the second end of second resistance R02 described in single start relay circuit unit 202, and described first
Diode D01 negative electrode is connected with the second end of first relay 2021.
In the present embodiment, the second diode circuit unit 208 includes the second diode D02, second diode
D02 anode is connected with the second end of first resistor R01 described in discharge circuit unit 206, the moon of the second diode D02
Pole is connected connection with the cathode output end bm1 of the rectifier bridge 201.
In the present embodiment, the filter circuit unit 203 includes the first electrochemical capacitor E01 and the second electrochemical capacitor E02.Its
In, the positive pole of the first electrochemical capacitor E01 and the second electrochemical capacitor E02 positive pole start electricity with single relay
The second end connection of first relay 2021 in road unit 202, the negative pole of the first electrochemical capacitor E01 and described the
Cathode output end bm1 of the two electrochemical capacitor E02 negative pole with the rectifier bridge 201 is connected.
The discharge circuit unit 106, first diode circuit in the present embodiment air conditioner variable frequency drive
The operation principle of unit 107 and the second diode circuit unit 108 is identical with above-mentioned first embodiment, no longer superfluous herein
State.
The present embodiment air conditioner variable frequency drive can avoid damaging institute when carrying out production voltage-withstand test to air conditioner
Rectifier bridge is stated, while the present embodiment is also avoided that the damage for causing the rectifier bridge during rectifier bridge reversal connection, so as to improve
The stability and reliability of the present embodiment air conditioner variable frequency drive.
The utility model also provides a kind of air conditioner, and the air conditioner includes air conditioner variable frequency drive, and the air conditioner becomes
The structure of frequency drive circuit can refer to above-mentioned first embodiment or second embodiment, will not be repeated here.Naturally, due to
The air conditioner of the present embodiment employs the technical scheme of above-mentioned air conditioner variable frequency drive, therefore the air conditioner has above-mentioned sky
Adjust all beneficial effects of device variable frequency drive.
Preferred embodiment of the present utility model is these are only, not thereby limits the scope of the claims of the present utility model, it is every
The equivalent structure or equivalent flow conversion made using the utility model specification and accompanying drawing content, or be directly or indirectly used in
Other related technical areas, similarly it is included in scope of patent protection of the present utility model.
Claims (12)
- A kind of 1. air conditioner variable frequency drive, it is characterised in that the air conditioner variable frequency drive include rectifier bridge, it is double after Appliance starting circuit unit, filter circuit unit, inverter circuit unit, when carrying out for the air conditioner production voltage-withstand test pair The rectifier bridge carries out the discharge circuit unit of repid discharge, for the rectifier bridge reversal connection when it is defeated to the positive pole of the rectifier bridge Go out end and carry out the first diode circuit unit of the pressure-resistant protection of surge and during for the rectifier bridge reversal connection to the rectifier bridge Cathode output end carry out the pressure-resistant protection of surge the second diode circuit unit；Wherein：The first end of the discharge circuit unit is connected with the cathode output end of the rectifier bridge, and the of the discharge circuit unit Two ends are connected through the second diode circuit unit with the cathode output end of the rectifier bridge；The first diode circuit list Member is connected between the cathode output end of the rectifier bridge and the first end of the double relay start-up circuit unit；It is described it is double after Second end of appliance starting circuit unit respectively with the first end of the filter circuit unit and the inverter circuit unit just Pole input connection；The negative input of second end of the filter circuit unit and the inverter circuit unit with it is described whole Flow the cathode output end connection of bridge.
- 2. air conditioner variable frequency drive as claimed in claim 1, it is characterised in that the discharge circuit unit includes first Resistance and the first electric capacity；Wherein：The first end of the first resistor is connected with the cathode output end of the rectifier bridge, and the second end of the first resistor is through institute State the second diode circuit unit to be connected with the cathode output end of the rectifier bridge, first electric capacity and the first resistor are simultaneously Connection.
- 3. air conditioner variable frequency drive as claimed in claim 2, it is characterised in that the first diode circuit unit bag The first diode is included, the anode of first diode is connected with the cathode output end of the rectifier bridge, first diode Negative electrode be connected with the first end of the double relay start-up circuit unit.
- 4. air conditioner variable frequency drive as claimed in claim 3, it is characterised in that the second diode circuit unit bag The second diode is included, the anode of second diode is connected with the second end of first resistor described in discharge circuit unit, institute The negative electrode for stating the second diode is connected connection with the cathode output end of the rectifier bridge.
- 5. air conditioner variable frequency drive as claimed in claim 4, it is characterised in that the double relay start-up circuit unit Including the first relay, the second relay and second resistance；Wherein：The first end of first relay is connected with the negative electrode of first diode, the second end of first relay with The first end connection of the second resistance, the second end of the second resistance respectively with the first end of the filter circuit unit and The electrode input end connection of the inverter circuit unit；The first end of second relay and the negative electrode of first diode Connection, the second end of second relay respectively with the first end of the filter circuit unit and the inverter circuit unit Electrode input end connects.
- 6. a kind of air conditioner variable frequency drive, it is characterised in that the air conditioner variable frequency drive includes rectifier bridge, Dan Ji Appliance starting circuit unit, filter circuit unit, inverter circuit unit, when carrying out for the air conditioner production voltage-withstand test pair The rectifier bridge carries out the discharge circuit unit of repid discharge, for the rectifier bridge reversal connection when it is defeated to the positive pole of the rectifier bridge Go out end and carry out the first diode circuit unit of the pressure-resistant protection of surge and during for the rectifier bridge reversal connection to the rectifier bridge Cathode output end carry out the pressure-resistant protection of surge the second diode circuit unit；Wherein：The first end of single start relay circuit unit is connected with the cathode output end of the rectifier bridge, single relay Second end of start-up circuit unit respectively the first end with the discharge circuit unit, the first end of the filter circuit unit and The electrode input end connection of the inverter circuit unit；Second end of the discharge circuit unit is through second diode circuit Unit is connected with the cathode output end of the rectifier bridge；The first diode circuit unit and single start relay circuit Unit connects；The negative input of second end of the filter circuit unit and the inverter circuit unit with the rectifier bridge Cathode output end connection.
- 7. air conditioner variable frequency drive as claimed in claim 6, it is characterised in that the discharge circuit unit includes first Resistance and the first electric capacity；Wherein：The first end of the first resistor is connected with the second end of single start relay circuit unit, the first resistor Second end is connected through the second diode circuit unit with the cathode output end of the rectifier bridge, first electric capacity with it is described First resistor is in parallel.
- 8. air conditioner variable frequency drive as claimed in claim 7, it is characterised in that single start relay circuit unit Including the first relay and second resistance；Wherein：The first end of first relay is connected with the cathode output end of the rectifier bridge, the second end of first relay Respectively with the first end of first resistor described in the discharge circuit unit, the first end of the filter circuit unit and described inverse Become the electrode input end connection of circuit unit；The first end of the second resistance is connected with the first end of first relay, Second end of the second resistance is connected through the first diode circuit unit with the second end of first relay.
- 9. air conditioner variable frequency drive as claimed in claim 8, it is characterised in that the first diode circuit unit bag Include the first diode, the of the anode of first diode and second resistance described in single start relay circuit unit Two ends are connected, and the negative electrode of first diode is connected with the second end of first relay.
- 10. the air conditioner variable frequency drive as any one of claim 7 to 9, it is characterised in that the two or two pole Pipe circuit unit includes the second diode, and the of the anode of second diode and first resistor described in discharge circuit unit Two ends connect, and the negative electrode of second diode is connected connection with the cathode output end of the rectifier bridge.
- 11. a kind of air conditioner, it is characterised in that the air conditioner that the air conditioner includes any one of claim 1 to 5 becomes Frequency drive circuit.
- 12. a kind of air conditioner, it is characterised in that the air conditioner includes the air conditioner any one of claim 6 to 10 Variable frequency drive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720823294.7U CN207184332U (en) | 2017-07-06 | 2017-07-06 | Air conditioner variable frequency drive and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720823294.7U CN207184332U (en) | 2017-07-06 | 2017-07-06 | Air conditioner variable frequency drive and air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207184332U true CN207184332U (en) | 2018-04-03 |
Family
ID=61735702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720823294.7U Active CN207184332U (en) | 2017-07-06 | 2017-07-06 | Air conditioner variable frequency drive and air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207184332U (en) |
-
2017
- 2017-07-06 CN CN201720823294.7U patent/CN207184332U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231205 Address after: No. 9, Tuanjie Street, Dongxihu District, Wuhan, Hubei 430,040 Patentee after: TCL AIR CONDITIONER WUHAN Co.,Ltd. Address before: 528427, Zhongshan, Guangdong province Nantou town head road Patentee before: TCL AIR CONDITIONER (ZHONGSHAN) Co.,Ltd. |
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| TR01 | Transfer of patent right |