CN109579388A - Compressor SS (soft start) control circuit, method and air conditioner - Google Patents
Compressor SS (soft start) control circuit, method and air conditioner Download PDFInfo
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- CN109579388A CN109579388A CN201811413709.9A CN201811413709A CN109579388A CN 109579388 A CN109579388 A CN 109579388A CN 201811413709 A CN201811413709 A CN 201811413709A CN 109579388 A CN109579388 A CN 109579388A
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000003990 capacitor Substances 0.000 claims description 69
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 34
- 229910052710 silicon Inorganic materials 0.000 claims description 34
- 239000010703 silicon Substances 0.000 claims description 34
- 230000005611 electricity Effects 0.000 claims description 20
- 238000004378 air conditioning Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 3
- 238000009499 grossing Methods 0.000 description 3
- 102100039435 C-X-C motif chemokine 17 Human genes 0.000 description 2
- 101000889048 Homo sapiens C-X-C motif chemokine 17 Proteins 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a kind of compressor SS (soft start) control circuit, method and air conditioner, circuit of the present invention includes power circuit, the first control relay circuit, soft starting plate, the second control relay circuit, voltage detecting circuit and controller；Controller is when supply voltage is higher than preset voltage value, the first level is exported to the first control relay circuit and soft starting plate, power circuit is set to start compressor by the first relay and soft starting plate, when supply voltage is lower than preset voltage value, second electrical level is exported to the second control relay circuit, power circuit is set to directly initiate compressor by the second relay, technical solution of the present invention only just starts soft starting plate when supply voltage is excessively high, improves reliability and the service life of soft starting plate.
Description
Technical field
The present invention relates to Motor Control Field more particularly to a kind of compressor SS (soft start) control circuits, method and air conditioner.
Background technique
In recent years, as the load of air-conditioning is also more and more, dash current when compressor of air conditioner starts is increasing, such as
What reduces dash current, and protection electronic component has become an important topic of field of air conditioning research.In order to protect compressor
Relay and other electronic devices, soft starting plate are widely used.
The compressor operating logic for having soft starting plate under normal circumstances is, after power supply power supply, controller control compressor after
Electric appliance, soft starting plate, so that compressor operating.
Soft starting plate is mainly made of silicon-controlled, is controlled by controller, when compressor relay closure, in soft starting plate
Controlled silicon conducting, so that the voltage drop for supplying compressor is at half, load current when making compressor start reduces, and weakens impact
Electric current, protection press relay and other electronic components, when compressor runs and then make silicon-controlled shutdown, air-conditioning
It operates normally.
When the defect of the work-based logic is starting of air conditioner, cannot precisely judge whether to need it is silicon-controlled come protect press after
Electric appliance, when starting voltage is lower, soft starting plate is connected as usual, may cause compressor start torque deficiency, leads to compressor
There is the slow problem of compressor start in frequent starting, and if long-time service, silicon-controlled frequent unlatching shutdown be may result in
Silicon-controlled damage keeps soft starting plate ineffective, causes the damage of press relay He other electronic components.
Above content is only used to facilitate the understanding of the technical scheme, and is not represented and is recognized that above content is existing skill
Art.
Summary of the invention
The main purpose of the present invention is to provide a kind of compressor SS (soft start) control circuit, method and air conditioners, it is intended to solve
Certainly in the prior art soft starting plate in vain using causing soft starting plate, compressor relay and other electronic components easy to damage
Technical problem.
To achieve the above object, the present invention provides a kind of compressor soft starting plate control circuit, and the circuit includes power supply
Circuit, the first control relay circuit, soft starting plate, the second control relay circuit, voltage detecting circuit and controller；It is described
Power circuit and the voltage detecting circuit, first control relay circuit and second control relay circuit are distinguished
Connection, the controller and the voltage detecting circuit, first control relay circuit, second relay control electricity
Road and the soft starting plate are separately connected, and first control relay circuit is connect with the soft starting plate, the soft start
Plate is connect with compressor, and the compressor is also connect with second control relay circuit；Wherein,
The power circuit, for providing supply voltage for compressor start；
The voltage detecting circuit, for detecting the supply voltage；
The soft starting plate, for carrying out soft start to the compressor；
First control relay circuit, for exporting the first electric conducts when the controller, so that the electricity
Source circuit is powered the compressor through the soft starting plate；
Second control relay circuit, for being connected when the controller exports second electrical level, so that the electricity
Source circuit directly powers to the compressor；
The controller, for when the supply voltage is higher than preset voltage value, the control of the first relay of Xiang Suoshu to be electric
Road and the soft starting plate export the first level, and the power circuit is powered the compressor through the soft starting plate.
Preferably, the controller is also used to when the supply voltage is not higher than preset voltage value, Xiang Suoshu second after
Electrical apparatus control circuit exports second electrical level, and the power circuit directly powers to the compressor.
Preferably, the voltage detecting circuit includes first resistor, second resistance, 3rd resistor, first diode and
One capacitor；Wherein,
The first end of the first resistor is connect with the power circuit, and the second end of the first resistor is through described second
Resistance eutral grounding；
The cathode of the first diode is connect with the first power supply, and the of the anode of the first diode and 3rd resistor
One end connection；
The first end of the 3rd resistor is connect with the second end of the first resistor, the second end of the 3rd resistor with
The controller connection；
The first end of the first capacitor is connect with the second end of the 3rd resistor, the second termination of the first capacitor
Ground.
Preferably, first control relay circuit includes the second diode, the first triode and the first relay；Its
In,
The cathode of second diode is connect with the first end of the control coil of first relay, and the described 2nd 2
The anode of pole pipe is connect with the second end of the control coil of first relay；
The first end of the control coil of first relay is connect with the power circuit, the control of first relay
The second end of coil processed is connect with the collector of first triode, and the first contact of first relay soft is opened with described
Movable plate connection, the second contact of first relay and the firewire of power supply line connect；
The base stage of first triode is connect with the controller, the emitter ground connection of first triode.
Preferably, second control relay circuit includes third diode, the second triode and the second relay；Its
In,
The cathode of the third diode is connect with the first end of the control coil of second relay, and the described 3rd 2
The anode of pole pipe is connect with the second end of the control coil of second relay；
The first end of the control coil of second relay is connect with the power circuit, the control of second relay
The second end of coil processed is connect with the collector of second triode, the first contact of second relay and the compression
Machine connection, the second contact of second relay and the firewire of power supply line connect；
The base stage of second triode is connect with the controller, the emitter ground connection of second triode.
Preferably, the power circuit includes varistor, transformer, the 4th diode, the 5th diode, the six or two pole
Pipe, the 7th diode, the 8th diode, the second capacitor, third capacitor and the 4th resistance；Wherein,
The first end of the varistor and the firewire of power supply line connect, the second end of the varistor and the transformation
The first end of device connects；
The second end of the transformer is connect with the zero curve of the power supply line, the third end of the transformer and the described 4th
The anode of the cathode of diode and the 6th diode is separately connected, and the 4th end of the transformer is respectively with the described 5th 2
The anode of the cathode of pole pipe and the 7th diode is separately connected；
The anode of 4th diode is connect with the anode of the 5th diode, the cathode of the 4th diode with
The anode of 6th diode connects；
The cathode of 5th diode is connect with the anode of the 7th diode；
The cathode of 6th diode is connect with the anode of the 8th diode；
The cathode of 7th diode is connect with the anode of the 8th diode；
The cathode of 8th diode is connect with the first end of the 4th resistance, and the cathode of the 8th diode is also
It is separately connected with the first end of second capacitor, the first end of the third capacitor and the voltage detecting circuit；
The first end of second capacitor is connect with second source, the second end of second capacitor and the four or two pole
The anode of the anode of pipe and the 5th diode is separately connected；
The first end of the third capacitor is connect with the first end of the 4th resistance, the second end of the third capacitor with
The anode of 4th diode and the anode of the 5th diode are separately connected；
The second end and first control relay circuit and second control relay circuit of 4th resistance
It is separately connected.
Preferably, the soft starting plate include the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance,
Tenth resistance, the 4th capacitor, the 5th capacitor, the 6th capacitor, the 9th diode, the tenth diode, soft start chip and silicon-controlled；
Wherein,
The first end of 5th resistance is connect with the controller, the second end of the 5th resistance and the soft start
The first end of chip connects；
The second end of the soft start chip is grounded, the third end of the soft start chip and the first of the 6th resistance
End connection, the 4th end of the soft start chip is connect with the silicon-controlled first end；
The second end of 6th resistance is connect with the anode of the tenth diode；
Divide after 9th resistance and the tenth resistor coupled in parallel with the cathode of the tenth diode and the compressor
It does not connect；
The first end of 4th capacitor is connect with the 4th end of the soft start chip, the second end of the 4th capacitor
It is connect with the first end of the 5th capacitor, the second end of the 4th capacitor also connects with first control relay circuit
It connects；
The second end of 5th capacitor is connect with the second end of the 6th resistance；
The first end of 7th resistance is connect with the silicon-controlled first end, the second end of the 7th resistance and institute
State the cathode connection of the 9th diode；
The anode of 9th diode is connect with the anode of the tenth diode；
The silicon-controlled second end is connect with the compressor, the silicon-controlled third end and the 8th resistance
First end connection；
The second end of 8th resistance is connect with the first end of the 6th capacitor；
The second end of 6th capacitor is connect with the silicon-controlled second end.
The present invention also proposes a kind of compressor soft start control method, this method comprises:
Obtain supply voltage；
Judge whether the supply voltage is higher than preset voltage value；
When the supply voltage is higher than preset voltage value, the first relay and soft starting plate conducting and the second relay are driven
Device disconnects, to start compressor by the soft starting plate；
When the supply voltage is not higher than preset voltage value, first relay and the soft starting plate is driven to disconnect
It is connected with second relay, to directly initiate compressor.
The present invention also proposes that a kind of air conditioner, the air conditioner include compressor SS (soft start) control circuit as described above,
Or the air conditioner includes processor and computer readable storage medium, the program of computer-readable recording medium storage is located
Reason device realizes above-mentioned compressor soft start control method when executing.
Circuit of the present invention includes power circuit, the first control relay circuit, soft starting plate, the second relay control electricity
Road, voltage detecting circuit and controller；Wherein, power circuit is used to provide supply voltage for compressor start；Voltage detecting electricity
Road is for detecting supply voltage；Soft starting plate is used to carry out soft start to the compressor；First control relay circuit is used for
When the electric conducts of controller output first, so that power circuit is powered compressor through soft starting plate；Second relay
Control circuit is used to be connected when controller exports second electrical level, so that power circuit directly powers to compressor；Controller is used
In when supply voltage is higher than preset voltage value, the first level is exported to the first control relay circuit and the soft starting plate；
It is on the contrary then to the second control relay circuit export second electrical level, through the above technical solutions, improving the reliable of soft starting plate
Property and service life, avoid high frequent start-stop, improve air-conditioning quality.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
The structure shown according to these attached drawings obtains other attached drawings.
Fig. 1 is a kind of functional block diagram of one embodiment of compressor SS (soft start) control circuit of the present invention；
Fig. 2 is a kind of structural schematic diagram of one embodiment of compressor SS (soft start) control circuit of the present invention；
Fig. 3 is a kind of flow chart of one embodiment of compressor soft start control method of the present invention.
Drawing reference numeral explanation:
| Label | Title | Label | Title |
| 100 | Power circuit | VCC1~VCC2 | First power supply is to second source |
| 200 | First control relay circuit | R1~R10 | First resistor is to the tenth resistance |
| 300 | Voltage detecting circuit | C1~C6 | First capacitor is to the 6th capacitor |
| 400 | Second control relay circuit | D1~D10 | First diode is to the tenth diode |
| RQ | Soft starting plate | K1~K2 | First relay to the second relay |
| MC | Compressor | IC1 | Soft start chip |
| U1 | Controller | N1 | It is silicon-controlled |
| PTC | Varistor | P1 | The firewire of power supply line |
| T1 | Transformer | P2 | The zero curve of power supply line |
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
It is to be appreciated that if relating to directionality instruction (such as up, down, left, right, before and after ...) in the embodiment of the present invention,
Then directionality instruction be only used for explain under a certain particular pose (as shown in the picture) between each component relative positional relationship,
Motion conditions etc., if the particular pose changes, directionality instruction is also correspondingly changed correspondingly.
In addition, being somebody's turn to do " first ", " second " etc. if relating to the description of " first ", " second " etc. in the embodiment of the present invention
Description be used for description purposes only, be not understood to indicate or imply its relative importance or implicitly indicate indicated skill
The quantity of art feature." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one spy
Sign.It in addition, the technical solution between each embodiment can be combined with each other, but must be with those of ordinary skill in the art's energy
It is enough realize based on, will be understood that the knot of this technical solution when conflicting or cannot achieve when occurs in the combination of technical solution
Conjunction is not present, also not the present invention claims protection scope within.
The present invention provides a kind of compressor SS (soft start) control circuit, and referring to Fig.1, in one embodiment, the circuit includes
Power circuit 100, the first control relay circuit 200, soft starting plate RQ, voltage detecting circuit 300, the second relay control electricity
Road 400 and controller U1；The power circuit 100 and the voltage detecting circuit 300, first control relay circuit
200 and second control relay circuit 400 be separately connected, it is the controller U1 and the voltage detecting circuit 300, described
First control relay circuit 200, second control relay circuit 400 and the soft starting plate RQ are separately connected, described
First control relay circuit 200 is connect with the soft starting plate RQ, and the soft starting plate RQ is connect with compressor MC, the pressure
Contracting machine MC is also connect with second control relay circuit 400；Wherein, the power circuit 100, for being opened for compressor MC
It is dynamic that supply voltage is provided；The voltage detecting circuit 300, for detecting the supply voltage；The soft starting plate RQ, for pair
The compressor MC carries out soft start；First control relay circuit 200, for when the first electricity of controller U1 output
Conducts, so that the power circuit is powered the compressor MC through the soft starting plate RQ；Second relay
Device control circuit 400, for being connected when the controller U1 exports second electrical level, so that the power circuit is directly to described
Compressor MC power supply；The controller U1 is used for when the supply voltage is higher than preset voltage value, the first relay of Xiang Suoshu
Control circuit 200 and the soft starting plate RQ export the first level, and the power circuit is through the soft starting plate RQ to the pressure
Contracting machine MC is powered.
Further, the controller U1 is also used to when the supply voltage is not higher than preset voltage value, Xiang Suoshu the
Two control relay circuits 400 export second electrical level, and the power circuit directly powers to the compressor MC.
It should be noted that the present embodiment increases voltage detecting circuit 300 and the second relay in prior art basis
Control circuit 400 judges the height of supply voltage by the voltage detecting circuit 300, to judge whether to need to carry out soft open
Dynamic protective relay, if desired, first control relay circuit 200 and the soft starting plate are passed through by the controller U1
RQ carries out soft start to the compressor MC mono- suitable starting voltage；If not needing, directly passed through by the controller U1
Second control relay circuit 400 carries out hard reboot.
It should be understood that the soft start refers to that voltage is slowly promoted to voltage rating by zero, make the overall process of electric motor starting
Impact torque is all not present, but smooth starting is run；The hard reboot, which refers to, to be directly initiated.
Circuit described in the present embodiment includes power circuit, the first control relay circuit, soft starting plate, the second relay control
Circuit, voltage detecting circuit and controller processed；Wherein, power circuit is used to provide supply voltage for compressor start；Voltage inspection
Slowdown monitoring circuit is for detecting supply voltage；Soft starting plate is used to carry out soft start to the compressor；First control relay circuit
For exporting the first electric conducts when controller, so that power circuit is powered compressor through soft starting plate；Second after
Electrical apparatus control circuit is used to be connected when controller exports second electrical level, so that power circuit directly powers to compressor；Control
Device is used for when supply voltage is higher than preset voltage value, to the first electricity of the first control relay circuit and soft starting plate output
It is flat；It is on the contrary then export second electrical level to the second control relay circuit, through the above technical solutions, improve soft starting plate can
By property and service life, high frequent start-stop is avoided, improves air-conditioning quality.
Referring to Fig. 2, Fig. 2 is a kind of structural schematic diagram of one embodiment of compressor SS (soft start) control circuit of the present invention.
In the present embodiment, the voltage detecting circuit 300 includes first resistor R1, second resistance R2,3rd resistor R3, the
One diode D1 and first capacitor C1；Wherein, the first end of the first resistor R1 is connect with the power circuit 100, described
The second end of first resistor R1 is grounded through the second resistance R2；The cathode of the first diode D1 and the first power supply VCC1 connect
It connects, the anode of the first diode D2 is connect with the first end of 3rd resistor R3；The first end of the 3rd resistor R3 and institute
The second end connection of first resistor R1 is stated, the second end of the 3rd resistor R3 is connect with the controller U1；First electricity
The first end for holding C1 is connect with the second end of the 3rd resistor R3, the second end ground connection of the first capacitor C1.
It will be appreciated that the first resistor R1, the second resistance R2 are divider resistance, the first diode D1 is
Voltage limiting diode, the 3rd resistor R3 are current-limiting resistance, and the first capacitor C1 is filter capacitor.
In the concrete realization, the voltage detecting circuit 300, which detects, is connected to+12V output voltage, the first resistor R1,
The second resistance R2 is divided, and the voltage signal that will test passes to the controller U1.
Further, first control relay circuit 200 includes the second diode D2, the first triode Q1 and first
Relay K1；Wherein, the cathode of the second diode D2 is connect with the first end of the control coil of the first relay K1,
The anode of the second diode D2 is connect with the second end of the control coil of the first relay K1；First relay
The first end of the control coil of K1 is connect with the power circuit 100, the second end of the control coil of the first relay K1
It is connect with the collector of the first triode Q1, the first contact of the first relay K1 and the soft starting plate RQ connect
It connects, the second contact of the first relay K1 and the firewire P1 connection of power supply line；The base stage of the first triode Q1 and institute
State controller U1 connection, the emitter ground connection of the first triode Q1.
It will be appreciated that described the first control relay circuit 200 and controller U1 and soft starting plate RQ points
It does not connect, so that the controller U1 can control the conducting of the first relay K1 and the soft starting plate RQ, thus realization pair
The soft start of the compressor MC.
Further, second control relay circuit 400 includes third diode D3, the second triode Q2 and second
Relay K2；Wherein, the cathode of the third diode D3 is connect with the first end of the control coil of the second relay K2,
The anode of the third diode D3 is connect with the second end of the control coil of the second relay K2；Second relay
The first end of the control coil of K2 is connect with the power circuit 100, the second end of the control coil of the second relay K2
It being connect with the collector of the second triode Q2, the first contact of the second relay K2 is connect with the compressor MC,
The second contact of the second relay K2 and the firewire P1 connection of power supply line；The base stage and the control of the second triode Q2
Device U1 connection processed, the emitter ground connection of the second triode Q2.
It is understood that described the second control relay circuit 400 and controller U1 and compressor MC points
It does not connect, allows the controller U1 to pass through the conducting of the second relay K2 of control to realize opening firmly for the compressor MC
It is dynamic.
Further, the soft starting plate include the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8,
9th resistance R9, the tenth resistance R10, the 4th capacitor C4, the 5th capacitor C5, the 6th capacitor C6, the 9th diode D9, the 12nd pole
Pipe D10, soft start chip IC 1 and silicon-controlled N1；Wherein, the first end of the 5th resistance R5 is connect with the controller U1,
The second end of the 5th resistance R5 is connect with the first end of the soft start chip IC 1；The second of the soft start chip IC 1
End ground connection, the third end of the soft start chip IC 1 are connect with the first end of the 6th resistance R6, the soft start chip
The 4th end of IC1 is connect with the first end of the silicon-controlled N1；The second end of the 6th resistance R6 and the tenth diode
The anode of D10 connects；Cathode after the 9th resistance R9 is in parallel with the tenth resistance R10 with the tenth diode D10
And the compressor MC is separately connected；The first end of the 4th capacitor C4 is connect with the 4th end of the soft start chip IC 1,
The second end of the 4th capacitor C4 is connect with the first end of the 5th capacitor C5, the second end of the 4th capacitor C4 also with
The first relay K1 control circuit connection；The second end of the 5th capacitor C5 and the second end of the 6th resistance R6 connect
It connects；The first end of the 7th resistance R7 is connect with the first end of the silicon-controlled N1, the second end of the 7th resistance R7 with
The cathode of the 9th diode D9 connects；The anode of the 9th diode D9 and the anode of the tenth diode D10 connect
It connects；The second end of the silicon-controlled N1 is connect with the compressor MC, the third end of the silicon-controlled N1 and the 8th resistance
The first end of R8 connects；The second end of the 8th resistance R8 is connect with the first end of the 6th capacitor C6；6th electricity
The second end for holding C6 is connect with the second end of the silicon-controlled N1.
It is understood that when the voltage detecting circuit 300 judgement needs to carry out soft start protective relay, it is described
Controller U1 gives the compressor MC mono- suitable starting voltage, reaches guarantor by the angle of flow of the control silicon-controlled N1
Shield compressor and relay simultaneously guarantee the effect that compressor normally starts.
In the concrete realization, the first port of the controller U1 is connect with the first triode Q1, for controlling the
One relay K1；The second port of the controller U1 is connect with the second triode Q2, for controlling the second relay K2；
The third port of the controller U1 is connect with the second end of the 3rd resistor R3, for receiving supply voltage；The control
The 4th port of device U1 is connect with the soft starting plate RQ, for controlling soft starting plate RQ.
The DC voltage of+12V from the power circuit 100 flows to described first by the first relay K1
Triode Q1, and the controller U1 controls the on-off of the first triode Q1, when the first port of the controller U1
When exporting high level signal with the 4th port, the first triode Q1 conducting, the first relay K1 conducting, described the
The output end of one relay K1 is closed, and realizes the soft start of the compressor MC.
The DC voltage of+12V from the power circuit 100 flows to described second by the second relay K2
Triode Q2, and the controller U1 controls the on-off of the second triode Q2, when the second port of the controller U1
When exporting a high level signal, the second triode Q2 conducting, the second relay K2 conducting, first relay
The output end of K2 is closed, to directly initiate the compressor MC.
Further, in order to keep supply voltage more steady, after power supply power supply, electric current needs to carry out pressure stabilizing rectification and filter
Wave, the power circuit 100 include varistor PTC, transformer T1, the 4th diode D4, the 5th diode D5, the six or two pole
Pipe D6, the 7th diode D7, the 8th diode D8, the second capacitor C2, third capacitor C3 and the 4th resistance R4；Wherein, the pressure
The first end of quick resistance PTC and the firewire P1 connection of power supply line, the second end of the varistor PTC and the transformer T1's
First end connection；The second end of the transformer T1 is connect with the zero curve P2 of the power supply line, the third end of the transformer T1
It is separately connected with the cathode of the 4th diode D4 and the anode of the 6th diode D6, the 4th end of the transformer T1
The anode with the cathode of the 5th diode D5 and the 7th diode D7 is separately connected respectively；The 4th diode D4
Anode connect with the anode of the 5th diode D5, the cathode of the 4th diode D4 and the 6th diode D6's
Anode connection；The cathode of the 5th diode D5 is connect with the anode of the 7th diode D7；The 6th diode D6
Cathode connect with the anode of the 8th diode D8；The cathode of the 7th diode D7 is with the 8th diode D8's
Anode connection；The cathode of the 8th diode D8 is connect with the first end of the 4th resistance R4, the 8th diode D8
First end and the voltage detecting circuit 300 of the cathode also with the first end of the second capacitor C2, the third capacitor C3
It is separately connected；The first end of the second capacitor C2 is connect with second source VCC2, the second end of the second capacitor C2 and institute
The anode of the anode and the 5th diode D5 of stating the 4th diode D4 is separately connected；The first end of the third capacitor C3 with
The first end of the 4th resistance R4 connects, the second end of the third capacitor C3 and the anode of the 4th diode D4 and institute
The anode for stating the 5th diode D5 is separately connected；The second end of the 4th resistance R4 and first control relay circuit
200 and second control relay circuit 300 be separately connected.
It should be noted that the varistor PTC is antisurge varistor, because of in a flash of just having opened of power supply
Strong pulse, i.e. surge are generated, it is likely to burn out circuit in a flash, and varistor is a kind of pair of voltage change reaction
Sensitive votage limit type element, can be effectively protected circuit.
The transformer T1 is the device for changing alternating voltage using the principle of electromagnetic induction, and main member is primary line
Circle, secondary coil and magnetic core.
In the concrete realization, when power supply is initially powered, electric current passes through the varistor from the end firewire P1 of power supply line
Then PTC is depressured by the transformer T1, then carries out rectifying and wave-filtering.
It will be appreciated that the 4th diode D4, the 5th diode D5, the 6th diode D6, described
Seven diode D7, the 8th diode D8 form rectification circuit；The second capacitor C2 is smoothing capacity, for filtering out exchange
Ingredient keeps the direct current of output smoother；The third capacitor C3 and the 4th resistance R4 forms a RC filter circuit, and
Using the second capacitor C2 combination in parallel with the third capacitor C3, the filter effect of smoothing capacity can be improved.
In the concrete realization, when supply voltage be normal voltage 220V when, by the transformer T1 output voltage be+
12V can export the DC voltage an of+12V after smoothing capacity and RC filter circuit.
Hereinafter, illustrating the working principle of the present embodiment in conjunction with Fig. 2:
When voltage is normal voltage 220V in power supply, the voltage by transformer T1 output is+12V, works as voltage
When excessively high, the output voltage of the transformer T1 can also increase therewith, and the voltage that the voltage detecting circuit 300 detects is therewith
Rise, the voltage feedback value that the controller U1 is received rises, and is set by the resistance value of the first resistor R1, second resistance R2
Fixed, when supply voltage is higher than a certain preset value a, the voltage value that the controller U1 is received also corresponds to a value b, so setting
A fixed logic, as the voltage c > b that the third port of the controller U1 receives, the first port of the controller U1
High level is exported with the 4th port, the first relay K1 and soft starting plate RQ conducting is controlled, starts the compressor
MC；As c≤b, the soft starting plate RQ is not turned on, and the second relay K2 conducting, the compressor MC is by described second
Relay K2 is directly initiated.
Specifically, supply voltage is excessively high, when c > b, the first port of the controller U1 and the high electricity of the 4th port output
Flat, second port keeps low level, and the soft starting plate RQ and the first relay K1 is connected, silicon-controlled carry out copped wave,
Controlled silicon conducting angle is reduced therewith with the increase of c, is gradually reduced since 90 °, protects the first relay K1 not by big
Rush of current, after compressor MC starting, when normal operation, the 4th port exports low level, silicon-controlled shutdown.
When voltage is normal or relatively low, when c≤b, the first port of the controller U1 and the 4th port keep low level, the
Two-port netwerk export high level, the soft starting plate RQ and the first relay K1 shutdown, supply voltage by described second after
Electric appliance K2 directly acts on the compressor MC, starts it normally.
The present embodiment can effectively detect whether compressor needs soft open by the soft start application technology of detection with voltage
It is dynamic, and selection soft start and hard reboot can be carried out, it can be controlled according to the value of voltage when using soft start silicon-controlled
The angle of flow, effective protection press relay and other electronic components, and guarantee that compressor has sufficiently large starting voltage, guarantee
Compressor normally starts, and avoids high frequent start and stop phenomenon caused by dividing excessively because of soft starting plate, promotes air-conditioning quality.
It is a kind of flow chart of one embodiment of compressor soft start control method of the present invention referring to Fig. 3, Fig. 3.
In the present embodiment, the compressor soft start control method the following steps are included:
S10: supply voltage is obtained；
S20: judge whether the supply voltage is higher than preset voltage value；
S30: when the supply voltage is higher than preset voltage value, the first relay and soft starting plate conducting and second are driven
Relay disconnects, to start compressor by the soft starting plate.
Further, after step S20, the method also includes:
S30 ': when the supply voltage is not higher than preset voltage value, first relay and the soft start are driven
Plate disconnects and second relay conducting, to directly initiate compressor.
It should be noted that after power supply power supply then electric current passes through the voltage detecting electricity by the power circuit 100
Road 300, the controller U1, then using the first relay K1 and the second relay K2, the opening and closing of relay is by institute
Controller U1 control is stated, the controller U1 receives the signal of the voltage detecting circuit 300, judges whether to need described in unlatching
Soft starting plate RQ protects the first relay K1, finally realizes the function of controlling the compressor MC.
Specifically, when the controller U1 receives supply voltage, judge whether the supply voltage is higher than default electricity
The soft starting plate RQ is connected when overtension in pressure value, protects the first relay K1, and control silicon-controlled conducting
Angle starts the compressor MC normally；When the supply voltage is normal or relatively low, be directly connected described second after
Electric appliance K2 does not use the soft starting plate RQ, starts the compressor MC normally, guarantee the normal use of air-conditioning.
When air-conditioning be switched on run after, the controller U1 by output low and high level control the first relay K1 and second after
Silicon-controlled conducting and shutdown in the opening and closing of electric appliance K2 and the soft starting plate RQ.
When the first relay K1 closure, electric current passes through silicon-controlled, the controller in the soft starting plate RQ
U1 controls the silicon-controlled angle of flow, reaches protection the first relay K1 and guarantees the work that the compressor MC normally starts
With.
When the second relay K2 closure, the compressor MC normally starts, it is not necessary that first relay is connected
The K1 and soft starting plate RQ.
The present embodiment judges whether voltage is higher than preset value to decide whether by detecting to supply voltage
Soft start realizes the accurate control that soft start is carried out to compressor.
The present invention also proposes that a kind of air conditioner, the air conditioner include compressor SS (soft start) control circuit as described above,
Or the air conditioner includes processor and computer readable storage medium, the program of computer-readable recording medium storage is located
Reason device realizes above-mentioned compressor soft start control method when executing.The electricity of the compressor SS (soft start) control circuit of the air conditioner
The step of line structure and compressor soft start control method, can refer to above-described embodiment, and details are not described herein；It is understood that
Since the air conditioner of the present embodiment uses the skill of above-mentioned compressor SS (soft start) control circuit or compressor soft start control method
Art scheme, therefore the air conditioner has above-mentioned all beneficial effects.
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of compressor SS (soft start) control circuit, which is characterized in that the compressor SS (soft start) control circuit includes power supply electricity
Road, the first control relay circuit, soft starting plate, the second control relay circuit, voltage detecting circuit and controller；The electricity
Source circuit connects respectively with the voltage detecting circuit, first control relay circuit and second control relay circuit
It connects, the controller and the voltage detecting circuit, first control relay circuit, second control relay circuit
And the soft starting plate is separately connected, first control relay circuit is connect with the soft starting plate, the soft starting plate
It is connect with compressor, the compressor is also connect with second control relay circuit；Wherein,
The power circuit, for providing supply voltage for compressor start；
The voltage detecting circuit, for detecting the supply voltage；
The soft starting plate, for carrying out soft start to the compressor；
First control relay circuit, for exporting the first electric conducts when the controller, so that the power supply is electric
Road is powered the compressor through the soft starting plate；
Second control relay circuit, for being connected when the controller exports second electrical level, so that the power supply is electric
Road directly powers to the compressor；
The controller, for when the supply voltage be higher than preset voltage value when, the first control relay circuit of Xiang Suoshu and
The soft starting plate exports the first level, and the power circuit is powered the compressor through the soft starting plate.
2. compressor SS (soft start) control circuit as described in claim 1, which is characterized in that the controller is also used to work as institute
When stating supply voltage not higher than preset voltage value, the second control relay circuit of Xiang Suoshu exports second electrical level, the power supply electricity
Road directly powers to the compressor.
3. compressor SS (soft start) control circuit as claimed in claim 2, which is characterized in that the voltage detecting circuit includes the
One resistance, second resistance, 3rd resistor, first diode and first capacitor；Wherein,
The first end of the first resistor is connect with the power circuit, and the second end of the first resistor is through the second resistance
Ground connection；
The cathode of the first diode is connect with the first power supply, the anode of the first diode and the first end of 3rd resistor
Connection；
The first end of the 3rd resistor is connect with the second end of the first resistor, the second end of the 3rd resistor with it is described
Controller connection；
The first end of the first capacitor is connect with the second end of the 3rd resistor, the second end ground connection of the first capacitor.
4. compressor SS (soft start) control circuit as claimed in claim 2, which is characterized in that first control relay circuit
Including the second diode, the first triode and the first relay；Wherein,
The cathode of second diode is connect with the first end of the control coil of first relay, second diode
Anode connect with the second end of the control coil of first relay；
The first end of the control coil of first relay is connect with the power circuit, the control line of first relay
The second end of circle is connect with the collector of first triode, the first contact of first relay and the soft starting plate
Connection, the second contact of first relay and the firewire of power supply line connect；
The base stage of first triode is connect with the controller, the emitter ground connection of first triode.
5. compressor SS (soft start) control circuit as claimed in claim 2, which is characterized in that second control relay circuit
Including third diode, the second triode and the second relay；Wherein,
The cathode of the third diode is connect with the first end of the control coil of second relay, the third diode
Anode connect with the second end of the control coil of second relay；
The first end of the control coil of second relay is connect with the power circuit, the control line of second relay
The second end of circle is connect with the collector of second triode, and the first contact of second relay and the compressor connect
It connects, the second contact of second relay and the firewire of power supply line connect；
The base stage of second triode is connect with the controller, the emitter ground connection of second triode.
6. compressor SS (soft start) control circuit as claimed in claim 2, which is characterized in that the power circuit includes pressure-sensitive electricity
Resistance, transformer, the 4th diode, the 5th diode, the 6th diode, the 7th diode, the 8th diode, the second capacitor,
Three capacitors and the 4th resistance；Wherein,
The first end of the varistor and the firewire of power supply line connect, the second end of the varistor and the transformer
First end connection；
The second end of the transformer is connect with the zero curve of the power supply line, the third end of the transformer and the four or two pole
The anode of the cathode of pipe and the 6th diode is separately connected, the 4th end of the transformer respectively with the 5th diode
Cathode and the anode of the 7th diode be separately connected；
The anode of 4th diode is connect with the anode of the 5th diode, the cathode of the 4th diode with it is described
The anode of 6th diode connects；
The cathode of 5th diode is connect with the anode of the 7th diode；
The cathode of 6th diode is connect with the anode of the 8th diode；
The cathode of 7th diode is connect with the anode of the 8th diode；
The cathode of 8th diode is connect with the first end of the 4th resistance, the cathode of the 8th diode also with institute
The first end of the second capacitor, the first end of the third capacitor and the voltage detecting circuit is stated to be separately connected；
The first end of second capacitor is connect with second source, the second end of second capacitor and the 4th diode
The anode of anode and the 5th diode is separately connected；
The first end of the third capacitor is connect with the first end of the 4th resistance, the second end of the third capacitor with it is described
The anode of the anode of 4th diode and the 5th diode is separately connected；
The second end of 4th resistance and first control relay circuit and second control relay circuit are distinguished
Connection.
7. compressor SS (soft start) control circuit as claimed in claim 2, which is characterized in that the soft starting plate includes the 5th electricity
Resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 4th capacitor, the 5th capacitor, the 6th capacitor,
Nine diodes, the tenth diode, soft start chip and silicon-controlled；Wherein,
The first end of 5th resistance is connect with the controller, the second end of the 5th resistance and the soft start chip
First end connection；
The second end of the soft start chip is grounded, and the first end of the third end of the soft start chip and the 6th resistance connects
It connects, the 4th end of the soft start chip is connect with the silicon-controlled first end；
The second end of 6th resistance is connect with the anode of the tenth diode；
9th resistance connects with after the tenth resistor coupled in parallel with the cathode of the tenth diode and the compressor respectively
It connects；
The first end of 4th capacitor is connect with the 4th end of the soft start chip, the second end of the 4th capacitor and institute
The first end connection of the 5th capacitor is stated, the second end of the 4th capacitor is also connect with first control relay circuit；
The second end of 5th capacitor is connect with the second end of the 6th resistance；
The first end of 7th resistance is connect with the silicon-controlled first end, the second end of the 7th resistance and described the
The cathode of nine diodes connects；
The anode of 9th diode is connect with the anode of the tenth diode；
The silicon-controlled second end is connect with the compressor, the silicon-controlled third end and the first of the 8th resistance
End connection；
The second end of 8th resistance is connect with the first end of the 6th capacitor；
The second end of 6th capacitor is connect with the silicon-controlled second end.
8. a kind of compressor soft start control method, which is characterized in that the compressor soft start control method includes following step
It is rapid:
Obtain supply voltage；
Judge whether the supply voltage is higher than preset voltage value；
When the supply voltage is higher than preset voltage value, drive the first relay and soft starting plate conducting and the second relay disconnected
It opens, to start compressor by the soft starting plate.
9. a kind of compressor soft start control method as claimed in claim 8, which is characterized in that the judgement power supply electricity
Whether pressure is higher than after preset voltage value, the method also includes:
When the supply voltage is not higher than preset voltage value, drives first relay and the soft starting plate disconnects and institute
The conducting of the second relay is stated, to directly initiate compressor.
10. a kind of air conditioner, which is characterized in that the air conditioner includes such as pressure as claimed in any one of claims 1 to 7
Contracting machine SS (soft start) control circuit or the air conditioner include processor and computer readable storage medium, computer-readable storage
The compressor soft start control method as described in claim 8-9 is realized when the program of media storage is executed by processor.
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| CN111023525A (en) * | 2019-12-18 | 2020-04-17 | 宁波奥克斯电气股份有限公司 | Control circuit and method and air conditioner |
| CN112665164A (en) * | 2020-11-30 | 2021-04-16 | 珠海格力电器股份有限公司 | Control circuit of air conditioner and control method thereof |
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