CN105932654A - Air conditioner and power supply control circuit of fan for air conditioner - Google Patents
Air conditioner and power supply control circuit of fan for air conditioner Download PDFInfo
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- CN105932654A CN105932654A CN201610494977.2A CN201610494977A CN105932654A CN 105932654 A CN105932654 A CN 105932654A CN 201610494977 A CN201610494977 A CN 201610494977A CN 105932654 A CN105932654 A CN 105932654A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
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Abstract
The invention discloses an air conditioner and a power supply control circuit of a fan for the air conditioner. The circuit comprises a rectifier unit, a filtering and voltage-stabilizing unit, a current limiting unit, a half-wave voltage sampling unit and a controller, wherein an input end of the rectifier unit is connected with an AC power supply to rectify an AC provided by the AC power supply into a pulsating DC; the filtering and voltage-stabilizing unit is connected with an output end of the rectifier unit and carries out filtering and voltage-stabilizing treatment on the pulsating DC to output the DC to the fan; the current limiting unit is used for limiting an impact current of a power supply loop of the fan; the half-wave voltage sampling unit is connected with the input end of the rectifier unit and carries out half-wave sampling on the AC to obtain a voltage sampling value; the controller is connected with the current limiting unit and the half-wave voltage sampling unit respectively and controls the current limiting unit to work when abnormal power-off of the AC power supply is judged according to the voltage sampling value to limit the impact current caused by instant power-up after abnormal power-off of the AC power supply, so that the boot failure of the fan caused by an over-high impact current is prevented; and the damage to a circuit component caused by the over-high impact current is prevented.
Description
Technical field
The present invention relates to air-conditioner technical field, particularly to the power control circuit of a kind of blower fan with a kind of there is this circuit
Air-conditioner.
Background technology
In the air-conditioner of correlation technique, during fan operation, alternating current power supply is it is possible that wink after of short duration abnormal power-down
Between situation about powering on.But, correlation technique does not take effective manner produced to re-powering after alternating current power supply power-off
Impact is processed, as it is shown in figure 1, can produce bigger dash current ic ＇ in circuit, is easily caused fan starting failure,
Even result in circuit component damage.
Therefore, correlation technique needs to improve.
Summary of the invention
It is contemplated that one of technical problem solved the most to a certain extent in correlation technique.To this end, the one of the present invention
Purpose is to propose the power control circuit of a kind of blower fan, and this circuit re-powers after can limiting blower fan abnormal power-down and produced
Dash current.
Further object is that a kind of air-conditioner of proposition.
For reaching above-mentioned purpose, one aspect of the present invention embodiment proposes the power control circuit of a kind of blower fan, including: rectification
Unit, the input of described rectification unit is connected with alternating current power supply with the AC rectification that described alternating current power supply provided for pulsation
Unidirectional current；Filtering voltage regulation unit, described filtering voltage regulation unit is connected with the outfan of described rectification unit, described filtering voltage regulation
Unit is filtered voltage stabilizing and processes with the output unidirectional current described blower fan of supply described Rectified alternating current；Flow-restriction, described limit
The dash current of the current supply circuit of described blower fan is limited by stream unit；Half-wave voltage sampling unit, described half-wave voltage is adopted
Sample unit is connected with the input of described rectification unit, and described half-wave voltage sampling unit carries out half-wave sampling to described alternating current
To obtain voltage sample value；Controller, described controller respectively with described flow-restriction and described half-wave voltage sampling unit phase
Even, control flow-restriction when described controller judges described alternating current power supply abnormal power-down according to described voltage sample value and carry out work
Make, power on the dash current caused with moment after limiting described alternating current power supply abnormal power-down.
The power control circuit of the blower fan proposed according to embodiments of the present invention, is carried out alternating current by half-wave voltage sampling unit
Half-wave is sampled to obtain voltage sample value, and controller controls current limliting list when judging alternating current power supply abnormal power-down according to voltage sample value
Unit is operated, and powers on the dash current caused with moment after limiting AC abnormity of power supply power-off, such that it is able to prevent blower fan because of
Dash current excessive drawing and start failure, and prevent component from damaging because dash current is excessive, that improves fan operation can
By property, extend service life of fan, promote Consumer's Experience.
According to one embodiment of present invention, described controller judges that described voltage sample value less than the first preset voltage value and is held
During continuous first Preset Time, it is judged that described alternating current power supply abnormal power-down.
According to one embodiment of present invention, described filtering voltage regulation unit includes: filter inductance, one end of described filter inductance
It is connected with the positive output end of described rectification unit；Electrochemical capacitor, the positive terminal of described electrochemical capacitor by described flow-restriction with
The other end of described filter inductance is connected, and the negative pole end of described electrochemical capacitor is connected with the negative output terminal of described rectification unit, its
In, described blower fan is connected to the two ends of described electrochemical capacitor.
According to one embodiment of present invention, described flow-restriction includes: current-limiting resistance；Gate-controlled switch, described gate-controlled switch
In parallel with described current-limiting resistance, the control end of described gate-controlled switch is connected with described controller.
According to one embodiment of present invention, when after described controller judges described alternating current power supply abnormal power-down, time delay second is preset
Between control described gate-controlled switch and disconnect so that described current-limiting resistance accesses described current supply circuit, and power on again in described alternating current power supply
And power-on time reaches to control described gate-controlled switch Guan Bi during three Preset Times.
A specific embodiment according to the present invention, described gate-controlled switch can be relay.
According to one embodiment of present invention, described half-wave voltage sampling unit includes: the first diode, described one or two pole
The anode of pipe is connected with the first input end of described rectification unit；Second diode, the anode of described second diode is with described
Second input of rectification unit is connected, and the negative electrode of described second diode is connected to one with the negative electrode of described first diode
Rise；First sampling resistor of series connection and the second sampling resistor, one end of described first sampling resistor and described second diode
Negative electrode is connected, and the other end of described first sampling resistor is connected with one end of described second sampling resistor and has node, described
Node is connected with described controller, and the other end of described second sampling resistor is connected with the negative output terminal of described rectification unit.
For reaching above-mentioned purpose, a kind of air-conditioner that another aspect of the present invention embodiment proposes, including the power supply of described blower fan
Control circuit.
The air-conditioner proposed according to embodiments of the present invention, by the power control circuit of above-mentioned blower fan, can be with limiting AC electricity
After the abnormal power-down of source, moment powers on the dash current caused, it is thus possible to prevent blower fan from starting mistake because of dash current excessive drawing
Lose, and prevent component from damaging because dash current is excessive, improve the reliability of fan operation, extend service life of fan,
Promote Consumer's Experience.
Accompanying drawing explanation
Fig. 1 is the waveform diagram of the dash current re-powering generation in correlation technique after alternating current power supply power-off；
Fig. 2 is the block diagram of the power control circuit of blower fan according to embodiments of the present invention；
Fig. 3 is the circuit theory diagrams of the power control circuit of blower fan according to an embodiment of the invention；And
Fig. 4 is the fundamental diagram of the power control circuit of blower fan according to an embodiment of the invention.
Reference:
Power control circuit 10, rectification unit 1, filtering voltage regulation unit 2, flow-restriction 3, half-wave voltage sampling unit 4,
Controller 5, blower fan 6 and alternating current power supply 7；
Filter inductance L0 and electrochemical capacitor C0；
Current-limiting resistance R0 and gate-controlled switch SW1；
First diode D1, the second diode D2, the first sampling resistor R1 and the second sampling resistor R2.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most identical
Or similar label represents same or similar element or has the element of same or like function.Retouch below with reference to accompanying drawing
The embodiment stated is exemplary, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings the air-conditioner of embodiment of the present invention proposition and the power control circuit of the blower fan for it are described.
Fig. 2 is the block diagram of the power control circuit of blower fan according to embodiments of the present invention.As in figure 2 it is shown, this power supply
Control circuit 10 includes: rectification unit 1, filtering voltage regulation unit 2, flow-restriction 3, half-wave voltage sampling unit 4 and control
Device 5 processed.
Wherein, the input of rectification unit 1 is connected with alternating current power supply 7 with the AC rectification that alternating current power supply 7 provided as arteries and veins
Dynamic unidirectional current；Filtering voltage regulation unit 2 is connected with the outfan of rectification unit 1, and Rectified alternating current is entered by filtering voltage regulation unit 2
Row filtering voltage regulation processes with output unidirectional current for fan 6；The flow-restriction 3 dash current ic to the current supply circuit of blower fan 3
Limit；Half-wave voltage sampling unit 4 is connected with the input of rectification unit 1, and half-wave voltage sampling unit 4 is to exchange
Electricity carries out half-wave and samples to obtain voltage sample value；Controller 5 respectively with flow-restriction 3 and half-wave voltage sampling unit 4 phase
Even, control flow-restriction 3 when controller 5 judges alternating current power supply 7 abnormal power-down according to voltage sample value to be operated, with limit
After alternating current power supply 7 abnormal power-down processed, moment powers on the dash current ic caused.
Specifically, as shown in Figures 2 and 3, in the course of the work, rectification unit 1 with filtering voltage regulation unit 2 to exchanging
The alternating current VA that power supply 7 provides carries out rectifying and wave-filtering process, and the unidirectional current after rectifying and wave-filtering is supplied to blower fan 6, meanwhile,
The alternating current VA that alternating current power supply 7 is inputted by half-wave voltage sampling unit 4 carries out half-wave sampling, to obtain voltage sample value VE.
According to voltage sample value VE, controller 5 judges whether alternating current power supply 7 exists power-off abnormal, if it is determined that alternating current power supply 7 supplies
Electricity is normal, and controller 5 then controls blower fan 6 steady operation；If it is determined that alternating current power supply 7 power-off is abnormal, controller 5 is then controlled
Flow-restriction 3 processed is operated, and so, when after alternating current power supply 7 power-off, moment powers on, can be limited by flow-restriction 3
Dash current ic in circuit.
According to one embodiment of present invention, as shown in Figure 4, controller 5 is judging that voltage sample value VE is preset less than first
When magnitude of voltage V0 and lasting first preset time T 1, it is judged that alternating current power supply 7 abnormal power-down.
Specifically, as shown in Figure 4, half-wave voltage sampling unit 4 carries out half-wave to the alternating current VA that alternating current power supply 7 inputs and adopts
Sample, voltage sample value VE and the first preset voltage value V0 are compared by controller 5, if in the first preset time T 1
In, at least there is primary voltage sampled value VE and be more than the first preset voltage value V0, controller 5 is just then judging alternating current power supply 7
Often power supply, power detection signal Vlvp that controller 5 generates is low level；If in the first preset time T 1, voltage
Sampled value VE is continuously less than the first preset voltage value V0, and controller 5 then judges that alternating current power supply 7 occurs abnormal power-down, controls
Power detection signal Vlvp that device 5 generates is high level.
First preset time T 1 can be the time such as 10ms of the half period of the alternating current that alternating current power supply 7 provides.
According to one embodiment of present invention, as it is shown on figure 3, filtering voltage regulation unit 2 includes: filter inductance L0 and electrolysis electricity
Holding C0, wherein, one end of filter inductance L0 is connected with the positive output end of rectification unit 1；The positive terminal of electrochemical capacitor C0 leads to
Cross flow-restriction 3 to be connected with the other end of filter inductance L0, the negative pole end of electrochemical capacitor C0 and the negative output of rectification unit 1
End is connected, and wherein, blower fan 6 is connected to the two ends of electrochemical capacitor C0.
According to one embodiment of present invention, as it is shown on figure 3, flow-restriction 3 includes: current-limiting resistance R0 and gate-controlled switch
SW1, wherein, gate-controlled switch SW1 is in parallel with current-limiting resistance R0, and the control end of gate-controlled switch SW1 is connected with controller 5.
In one particular embodiment of the present invention, gate-controlled switch SW1 can be relay.
According to one embodiment of present invention, as shown in Figure 4, controller 5 time delay after judging alternating current power supply 7 abnormal power-down
During the second preset time T 2, control gate-controlled switch SW1 and disconnect so that current-limiting resistance R0 accesses current supply circuit, and at alternating current
Source 7 powers on again and power-on time reaches to control during three preset time T 3 gate-controlled switch SW1 Guan Bi.
Specifically, as shown in Figure 4, gate-controlled switch SW1 is in parallel with current-limiting resistance R0, when gate-controlled switch SW1 disconnects,
Current-limiting resistance R0 accesses current supply circuit, to limit the electric current in current supply circuit, wherein, and one end of current-limiting resistance R0 and filtering
The other end of inductance L0 is connected, and the other end of current-limiting resistance R0 is connected with the positive terminal of electrochemical capacitor C0；Work as gate-controlled switch
During SW1 Guan Bi, current-limiting resistance R0 is shorted, and the positive terminal of the electrochemical capacitor C0 directly other end with filter inductance L0 is connected.
Controller 5 is after judging alternating current power supply 7 abnormal power-down, and power detection signal Vlvp of generation is high level, enters one
Step ground, controller 5 judges whether abnormal power-down persistent period i.e. power detection signal Vlvp keeps the persistent period of high level
Reach the second preset time T 2, if it is determined that the abnormal power-down persistent period is not up to the second preset time T 2, then controller 5
Output is high level to control signal Vi of gate-controlled switch SW1, and gate-controlled switch SW1 closes, and current-limiting resistance R0 is shorted；
If it is determined that the abnormal power-down persistent period reaches the second preset time T 2, then controller 5 exports the control to gate-controlled switch SW1
Signal Vi is low level, and gate-controlled switch SW1 disconnects, and current-limiting resistance R0 accesses current supply circuit.When alternating current power supply 7 goes up again
During electricity, blower fan 6 starts, and electric current is through current-limiting resistance R0, and the dash current ic in current supply circuit is less.
When after alternating current power supply 7 power-off, moment powers on, controller 5 can carry out timing to power-on time, and reaches at power-on time
During to three preset time T 3, it is judged that instantaneous large-current i.e. dash current terminates, now, controller 5 exports high level
Control signal Vi to gate-controlled switch SW1, and time control gate-controlled switch SW1 Guan Bi, it is ensured that alternating current power supply 7 steady operation.
A concrete example according to the present invention, the second preset time T 2 can be 10ms, and the 3rd preset time T 3 can be according to electricity
Blower fan 3 parameter in road or the parameter determination of electrochemical capacitor C0, such as, the 3rd preset time T 3 can be 10s.
A specific embodiment according to the present invention, as it is shown on figure 3, half-wave voltage sampling unit 4 includes: the first diode
D1, the second diode D2, the first sampling resistor R1 and the second sampling resistor R2.
Wherein, the anode of the first diode D1 is connected with the first input end of rectification unit 1；The anode of the second diode D2
Being connected with the second input of rectification unit 1, the negative electrode of the second diode D2 and the negative electrode of the first diode D1 are connected to one
Rise；First sampling resistor R1 and the second sampling resistor R2 series connection, one end of the first sampling resistor R1 and the second diode D2
Negative electrode be connected, the other end of the first sampling resistor R1 and one end of the second sampling resistor R2 are connected and have node, node
Being connected with controller 5, the other end of the second sampling resistor R2 is connected with the negative output terminal of rectification unit 1.
Specifically, the alternating current that alternating current power supply 7 is exported by the first diode D1 and the second diode D2 carries out halfwave rectifier,
Unidirectional current after rectification is sampled by the first sampling resistor R1 and the second sampling resistor R2, by adjusting the first sampling resistor
R1 and the resistance value of the second sampling resistor R2, can make the waveform getting voltage sample value VE be similar to alternating current power supply 7 half
Waveform after ripple rectification, wherein, the waveform of voltage sample value VE is as shown in Figure 4.
The operation principle of the power control circuit of the embodiment of the present invention is described below in conjunction with Fig. 4.
Assuming that the first preset voltage value V0 is 212V, the first preset time T 1 is 10ms, and the second preset time T 2 is 10ms,
As shown in Figure 4, according to the waveform i.e. waveform of VA of the alternating current that alternating current power supply 7 provides, alternating current power supply 7 is at M point
There is abnormal power-down in the corresponding moment, and re-powers in the moment that N point is corresponding.
As shown in Figure 4, when P point is corresponding, controller 5 judges that voltage sample value VE is less than 212V, when voltage is adopted
When the sample value VE persistent period less than 212V reaches 10ms, controller 5 judges alternating current power supply 7 abnormal power-down, generates height
Power detection signal Vlvp of level, and determine whether that persistent period i.e. power detection signal Vlvp of abnormal power-down keeps
Whether the persistent period of high level reaches 10ms, if controller 5 judges that the persistent period of abnormal power-down reaches 10ms, and control
Control signal Vi of device 5 then output low level processed is to gate-controlled switch SW1, to control gate-controlled switch SW1 disconnection, current-limiting resistance
R0 accesses current supply circuit.
When alternating current power supply 7 re-powered in the moment that N point is corresponding, electric current flows through from current-limiting resistance R0, as shown in Figure 4,
The dash current ic produced in current supply circuit is less, and the voltage VB at electrochemical capacitor C0 two ends is more steady.
Thus, by the switch of gate-controlled switch SW1 is controlled, when after alternating current power supply power-off, moment powers on, it is ensured that electricity
Stream flows through from current-limiting resistance R0, and then makes will not be formed on electrochemical capacitor C0 bigger dash current.
To sum up, the power control circuit of the blower fan proposed according to embodiments of the present invention, by half-wave voltage sampling unit to exchange
Electricity carries out half-wave and samples to obtain voltage sample value, and controller controls when judging alternating current power supply abnormal power-down according to voltage sample value
Flow-restriction is operated, and powers on the dash current caused with moment after limiting AC abnormity of power supply power-off, such that it is able to prevent
Blower fan starts failure because of dash current excessive drawing, and prevents component from damaging because dash current is excessive, improves blower fan fortune
The reliability of row, extends service life of fan, promotes Consumer's Experience.
The invention allows for a kind of air-conditioner, including the power control circuit of the blower fan of above-described embodiment.
To sum up, the air-conditioner proposed according to embodiments of the present invention, by the power control circuit of the blower fan of above-described embodiment, can
Power on the dash current caused with moment after limiting AC abnormity of power supply power-off, it is thus possible to prevent blower fan because of dash current mistake
Draw greatly and start failure, and prevent component from damaging because dash current is excessive, improve the reliability of fan operation, extend
Service life of fan, promotes Consumer's Experience.
In describing the invention, it is to be understood that term " " center ", " longitudinally ", " laterally ", " length ", " width ",
" thickness ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end " " interior ",
" outward ", " clockwise ", " counterclockwise ", " axially ", " radially ", " circumferential " etc. instruction orientation or position relationship be based on
Orientation shown in the drawings or position relationship, be for only for ease of the description present invention and simplify description rather than instruction or hint institute
The device that refers to or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to this
Bright restriction.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed
Or implicitly include at least one this feature.In describing the invention, " multiple " are meant that at least two, such as
Two, three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " install ", " being connected ", " connection ", " fixing "
Should be interpreted broadly Deng term, connect for example, it may be fixing, it is also possible to be to removably connect, or integral；Can be
It is mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two
The connection of individual element internal or the interaction relationship of two elements, unless otherwise clear and definite restriction.Common for this area
For technical staff, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can
Being that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, the
One feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or
Oblique upper, or it is merely representative of fisrt feature level height higher than second feature.Fisrt feature second feature " under ",
" lower section " and " below " can be fisrt feature immediately below second feature or obliquely downward, or it is special to be merely representative of first
Levy level height less than second feature.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
Example " or the description of " some examples " etc. means to combine this embodiment or example describes specific features, structure, material or
Person's feature is contained at least one embodiment or the example of the present invention.In this manual, the schematic table to above-mentioned term
State and be necessarily directed to identical embodiment or example.And, the specific features of description, structure, material or feature can
So that one or more embodiments in office or example to combine in an appropriate manner.Additionally, in the case of the most conflicting, this
The technical staff in field can be by the different embodiments described in this specification or example and different embodiment or the spy of example
Levy and be combined and combine.
Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is exemplary,
Being not considered as limiting the invention, those of ordinary skill in the art within the scope of the invention can be to above-described embodiment
It is changed, revises, replaces and modification.
Claims (8)
1. the power control circuit of a blower fan, it is characterised in that including:
Rectification unit, the input of described rectification unit is connected whole with the alternating current that described alternating current power supply provided with alternating current power supply
Stream is Rectified alternating current；
Filtering voltage regulation unit, described filtering voltage regulation unit is connected with the outfan of described rectification unit, described filtering voltage regulation unit
Described Rectified alternating current is filtered voltage stabilizing process with the output unidirectional current described blower fan of supply；
Flow-restriction, the dash current of the current supply circuit of described blower fan is limited by described flow-restriction；
Half-wave voltage sampling unit, described half-wave voltage sampling unit is connected with the input of described rectification unit, described half-wave
Voltage sampling unit carries out half-wave and samples to obtain voltage sample value described alternating current；
Controller, described controller is connected with described flow-restriction and described half-wave voltage sampling unit respectively, described controller
Control flow-restriction when judging described alternating current power supply abnormal power-down according to described voltage sample value to be operated, to limit described friendship
After stream abnormity of power supply power-off, moment powers on the dash current caused.
The power control circuit of blower fan the most according to claim 1, it is characterised in that described controller judges described electricity
When pressure sampled value is less than the first preset voltage value and lasting first Preset Time, it is judged that described alternating current power supply abnormal power-down.
The power control circuit of blower fan the most according to claim 1 and 2, it is characterised in that described filtering voltage regulation unit
Including:
Filter inductance, one end of described filter inductance is connected with the positive output end of described rectification unit；
Electrochemical capacitor, the positive terminal of described electrochemical capacitor is connected with the other end of described filter inductance by described flow-restriction,
The negative pole end of described electrochemical capacitor is connected with the negative output terminal of described rectification unit, and wherein, described blower fan is connected to described electrolysis
The two ends of electric capacity.
The power control circuit of blower fan the most according to claim 3, it is characterised in that described flow-restriction includes:
Current-limiting resistance；
Gate-controlled switch, described gate-controlled switch is in parallel with described current-limiting resistance, the control end of described gate-controlled switch and described controller
It is connected.
The power control circuit of blower fan the most according to claim 4, it is characterised in that described controller judges described friendship
After stream abnormity of power supply power-off, time delay the second Preset Time controls the disconnection of described gate-controlled switch so that described current-limiting resistance accesses described confession
Electricity loop, and described gate-controlled switch Guan Bi is controlled when described alternating current power supply powers on again and power-on time reaches three Preset Times.
The power control circuit of blower fan the most according to claim 4, it is characterised in that described gate-controlled switch is relay.
The power control circuit of blower fan the most according to claim 1, it is characterised in that described half-wave voltage sampling unit
Including:
First diode, the anode of described first diode is connected with the first input end of described rectification unit；
Second diode, the anode of described second diode is connected with the second input of described rectification unit, and the described 2nd 2
The negative electrode of pole pipe connects together with the negative electrode of described first diode；
First sampling resistor of series connection and the second sampling resistor, one end of described first sampling resistor and described second diode
Negative electrode is connected, and the other end of described first sampling resistor is connected with one end of described second sampling resistor and has node, described
Node is connected with described controller, and the other end of described second sampling resistor is connected with the negative output terminal of described rectification unit.
8. an air-conditioner, it is characterised in that include that the power supply according to the blower fan according to any one of claim 1-7 controls
Circuit.
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| CN201610494977.2A CN105932654B (en) | 2016-06-27 | 2016-06-27 | The power control circuit of air conditioner and the blower for it |
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| CN201610494977.2A CN105932654B (en) | 2016-06-27 | 2016-06-27 | The power control circuit of air conditioner and the blower for it |
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| CN108233325A (en) * | 2016-12-14 | 2018-06-29 | 中国航空工业集团公司西安航空计算技术研究所 | A kind of airborne electromagnetic valve supply current sampling protection circuit |
| CN112865507A (en) * | 2019-11-28 | 2021-05-28 | 广东美的制冷设备有限公司 | Power grid impact prevention device and air conditioner |
| CN113363932A (en) * | 2021-06-07 | 2021-09-07 | 山东建筑大学 | Series short-circuit fault detection and protection circuit based on electrolytic capacitor |
| CN113422352A (en) * | 2021-06-07 | 2021-09-21 | 山东建筑大学 | Strong-current switch circuit capable of automatically detecting short-circuit fault |
| CN114167934A (en) * | 2021-12-08 | 2022-03-11 | 北京北航天宇长鹰无人机科技有限公司 | Filtering and voltage-stabilizing control circuit and system |
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| CN201813314U (en) * | 2010-09-20 | 2011-04-27 | 石家庄国耀电子科技有限公司 | Alternating voltage sampling circuit of AC powered active power factor correction circuit |
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| CN113363932B (en) * | 2021-06-07 | 2022-06-21 | 山东建筑大学 | Series short-circuit fault detection and protection circuit based on electrolytic capacitor |
| CN113422352B (en) * | 2021-06-07 | 2022-06-21 | 山东建筑大学 | Strong-current switch circuit capable of automatically detecting short-circuit fault |
| CN114167934A (en) * | 2021-12-08 | 2022-03-11 | 北京北航天宇长鹰无人机科技有限公司 | Filtering and voltage-stabilizing control circuit and system |
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