CN108306539A - Control device, method and the refrigerator of variable frequency drives - Google Patents
Control device, method and the refrigerator of variable frequency drives Download PDFInfo
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- CN108306539A CN108306539A CN201810061320.6A CN201810061320A CN108306539A CN 108306539 A CN108306539 A CN 108306539A CN 201810061320 A CN201810061320 A CN 201810061320A CN 108306539 A CN108306539 A CN 108306539A
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
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- 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
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
-
- 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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/07—Details of compressors or related parts
- F25B2400/077—Compressor control units, e.g. terminal boxes, mounted on the compressor casing wall containing for example starter, protection switches or connector contacts
-
- 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
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/021—Inverters therefor
-
- 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2600/00—Control issues
- F25D2600/06—Controlling according to a predetermined profile
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Power Engineering (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The invention discloses a kind of control device of variable frequency drives, method and refrigerator, the method includes：In the first predetermined period of compressor operating, first switch mould the first control switch constant conduction in the block in variable frequency drives is controlled, and control the lasting shutdown of the second control switch corresponding with the first control switch；Respectively after the first preset time and the second preset time of first switch mould the first control switch conduction in the block and corresponding second control switch OFF, it is more than the first preset time with third switching molding the first control switch conduction in the block and corresponding second control switch OFF, the second preset time in the second control switch module in control variable frequency drives in succession.Present invention reduces the operation power consumptions of control switch.
Description
Technical field
The present invention relates to the control device of frequency control field more particularly to variable frequency drives, method and refrigerators.
Background technology
Refrigerator is essential electric appliance in people's life, has gradually appeared determine frequency refrigerator and frequency conversion with advances in technology
Refrigerator, wherein frequency conversion refrigerator are even more to have obtained the favor of users by its good performance.Frequency conversion refrigerator mainly passes through
The on or off of switching device in control variable frequency drives accurately controls frequency-changeable compressor, but actually derailing switch
Part will produce current loss in the moment of unlatching, and so as to cause switching device, switching power loss is high at runtime.
Invention content
The main purpose of the present invention is to provide a kind of control device of variable frequency drives, method and refrigerators, it is intended to solve
Switching device opens the high problem of moment operation power consumption in variable frequency drives.
To achieve the above object, the present invention provides a kind of control device of variable frequency drives, the variable frequency drives, with pressure
Contracting machine connects, for driving the compressor operating；Wherein, the variable frequency drives include first switch mould parallel with one another
Block, second switch module and third switch module；The first switch module, the second switch module and the third
Switch module includes the first control switch and is switched with concatenated second control of the first control switch, and described first opens
Close module, the second switch module and the corresponding first control switch of the third switch module and described the
Two controls switch three terminals that concatenated node is correspondingly connected with the compressor, the control device packet of the variable frequency drives
Control chip is included, the on or off for controlling the first control switch and the second control switch；
Wherein, in the first predetermined period of the compressor operating, first switch mould described in the control chip controls
First control switch constant conduction in the block simultaneously controls the corresponding lasting shutdown of second control switch；In the first switch module
In first control switch conduction and it is corresponding second control switch OFF the first preset time after, the control chip controls
The second switch mould in the block first controls switch conduction and controls corresponding second control switch OFF；It is opened described first
After Guan Mo the first control switch conductions in the block and the second preset time of corresponding second control switch OFF, the control core
Piece controls the third switching molding the first control switch conduction in the block and simultaneously controls corresponding second control switch OFF, and described the
Two preset times are more than first preset time and second preset time is in first predetermined period.
Optionally, the control chip is additionally operable in the first switch mould the first control switch conduction in the block and correspondence
Second control switch OFF third preset time after, control the third switching molding it is in the block it is described first control switch close
Break and control corresponding second control switch conduction, the third preset time is more than second preset time, and described the
Three preset times are in first predetermined period.
Optionally, the control chip is additionally operable in the first switch mould the first control switch conduction in the block and correspondence
Second control switch OFF the 4th preset time after, control the second switch mould it is in the block it is described first control switch close
Break and control corresponding second control switch conduction, the 4th preset time is more than the third preset time, and described the
Four preset times are in first predetermined period.
Optionally, the control chip is additionally operable to the after N number of first predetermined period of the compressor operating
In two predetermined periods, the first switch mould lasting shutdown of the first control switch in the block is controlled, and controls corresponding the
Two control switch constant conductions, wherein N are greater than or equal to 1.
Optionally, the control chip is additionally operable to the after N number of first predetermined period of the compressor operating
In two predetermined periods, the second switch mould the first control switch constant conduction in the block is controlled, and control corresponding second control
The lasting shutdown of system switch, or the lasting shutdown of the first control switch in the block of the control second switch mould, and control corresponding
Second control switch constant conduction, or the control third switching molding the first control switch constant conduction in the block, and control
The corresponding lasting shutdown of second control switch, or the lasting shutdown of the first control switch in the block of the control third switching molding,
And corresponding second control switch constant conduction is controlled, wherein N is greater than or equal to 1.
To achieve the above object, the present invention also provides a kind of refrigerators, including compressor and the control compressor operating
Variable frequency drives, the refrigerator further include the first control switch and the second control switch conduction in the control variable frequency drives
Or the control device of shutdown, the control device is the control device of variable frequency drives as described above.
To achieve the above object, the present invention also provides a kind of control methods of variable frequency drives, for by described in control
The conducting of three groups of switch modules parallel with one another corresponding first control switch and the second control switch in variable frequency drives
Or shutdown is to drive compressor operating；The corresponding first control switch of every group of switch module is connected with the second control switch,
And three terminals of the corresponding first control switch compressor corresponding with the second control concatenated node of switch；Packet
Include step：
In the first predetermined period of the compressor operating, control in the first switch module in the variable frequency drives
First control switch constant conduction, and control with this first control switch it is corresponding second control switch persistently turn off；
The first of switch conduction and corresponding second control switch OFF is controlled in the first switch mould in the block first
After preset time, second switch mould the first control switch conduction in the block in the variable frequency drives is controlled, and described in control
Second switch mould the second control switch OFF in the block；
The second of switch conduction and corresponding second control switch OFF is controlled in the first switch mould in the block first
After preset time, third switching molding the first control switch conduction in the block in the variable frequency drives is controlled, and described in control
Third switching molding the second control switch OFF in the block, second preset time are more than first preset time and described the
Two preset times are in first predetermined period.
Optionally, described in the first switch mould the first control switch conduction in the block and corresponding second control switch
After second preset time of shutdown, third switching molding the first control switch conduction in the block in the variable frequency drives is controlled,
And it controls the step of third switching molding in the block second controls switch OFF and further includes later：
In the third of the first switch mould the first control switch conduction in the block and corresponding second control switch OFF
After preset time, controls the third switching molding the first control switch OFF in the block and corresponding second control switch is led
Logical, the third preset time is more than second preset time and the third preset time is in first predetermined period
It is interior；
The 4th of switch conduction and corresponding second control switch OFF the is controlled in the first switch mould in the block first
After preset time, controls the second switch mould the first control switch OFF in the block and corresponding second control switch is led
Logical, the 4th preset time is more than the third preset time and the 4th preset time is in first predetermined period
It is interior.
Optionally, further include after all steps：
In the second predetermined period after N number of first predetermined period of the compressor operating, control described first
The switching molding lasting shutdown of the first control switch in the block, and corresponding second control switch constant conduction is controlled, wherein N is big
In or equal to 1.
Optionally, further include after all steps：
In the second predetermined period after N number of first predetermined period of the compressor operating, control described second
The switching molding lasting shutdown of the first control switch in the block, and control corresponding second control switch constant conduction, or control
The second switch mould the first control switch constant conduction in the block is made, and controls corresponding second control switch and persistently closes
It is disconnected, or the lasting shutdown of the first control switch in the block of the control third switching molding, and control corresponding second control
Constant conduction, or the control third switching molding the first control switch constant conduction in the block are switched, and controls correspondence
The second lasting shutdown of control switch, wherein N is greater than or equal to 1.
Control device, method and the refrigerator of a kind of variable frequency drives proposed by the present invention, by the compressor operating
The first predetermined period in, control first switch mould in the variable frequency drives the first control switch constant conduction in the block,
And control the lasting shutdown of the second control switch corresponding with the first control switch；In the first switch mould the first control in the block
After first preset time of switch conduction processed and corresponding second control switch OFF, second in the variable frequency drives is controlled
Switching molding the first control switch conduction in the block, and control the second switch mould the second control switch OFF in the block；Institute
After stating first switch mould the first control switch conduction in the block and the second preset time of corresponding second control switch OFF, control
Third switching molding the first control switch conduction in the block in the variable frequency drives is made, and is controlled in the third switch module
The second control switch OFF, second preset time is more than first preset time and second preset time in institute
It states in the first predetermined period.To using the first control switch in first switch module in the predetermined period constant conduction and
Corresponding second control switch persistently turns off in the predetermined period, reduces control in switch module and switches on number,
Then reduce current loss, reduce operation power consumption.
Description of the drawings
Fig. 1 is the hardware architecture diagram that variable frequency drives control compressor operating in the embodiment of the present invention；
Fig. 2 is the modular structure schematic diagram of the control device of variable frequency drives in the embodiment of the present invention；
Fig. 3 is the voltage modulated schematic diagram of the control device of variable frequency drives in the embodiment of the present invention；
Fig. 4 is the flow diagram of one embodiment of control method of variable frequency drives of the present invention；
Fig. 5 is the flow diagram of another embodiment of control method of variable frequency drives of the present invention；
Fig. 6 is the flow diagram of the another embodiment of control method of variable frequency drives of the present invention.
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 implementation mode
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
The variable frequency drives that the control method and device of variable frequency drives in various embodiments of the present invention are controlled are used for
Drive compressor operating.Referring to Fig. 1, the variable frequency drives include three groups of switch modules parallel with one another, are first to open respectively
Close module, second switch module and third switch module, every group of switch module includes the first control switch and with described first
The concatenated second control switch of control switch, wherein first switch mould the first control switch in the block are Sa, the second control switch
ForSecond switch mould the first control switch in the block is Sb, and the second control switch isThird switching molding in the block first
Control switch is Sc, and the second control switch is
In order to realize that compressor operating control, the every group of control of switch module first switch switch concatenated section with the second control
Point is correspondingly connected with tri- terminals of abc of compressor, the first control switch Sa and the second control in first switch module in Fig. 1
SwitchThe terminals a connections of concatenated node and compressor, the first control switch Sb and second is controlled in second switch module
SwitchThe terminals b connections of concatenated node and compressor, the first control switch Sc and second is controlled in third switch module
SwitchConcatenated node is correspondingly connected with the terminals c of compressor.It should be noted that in order to ensure the normal fortune of compressor
Row needs the control device by variable frequency drives to control every group of switching molding control switch conduction in the block, another is opened
Close module shutdown.Wherein, the control device of the variable frequency drives can be MCU (Microcontroller Unit, microcontroller
Unit), CPU (Central Processing Unit, central processing unit) is can also be, for sending out trigger signal control not
Same control is switched on or off.
In addition, in order to ensure the normal work of compressor, when carrying out variable frequency drives voltage modulated, it is manually set
Ensure the switch periods of the normal work of compressor.In one switch periods of every experience, the control in every group of switch module
Switch experienced it is primary open it is primary close, then return again the period start before operating status, that is to say, that experience one
Secondary switch periods need six control switch switch 12 times altogether, are opened including six times of control switch and six times are closed,
The loss of control switching current is more in this way, and operation power consumption increases.
The application proposes the control device of the application variable frequency drives on the basis of not changing above-mentioned hardware configuration.
In an embodiment of the control device of the application variable frequency drives, please with reference to Fig. 2 and Fig. 3, wherein Fig. 2 is
The modular structure schematic diagram of the control device of the variable frequency drives, including control chip 11, for controlling first control
The on or off of switch and the second control switch；Fig. 3 is the voltage modulated schematic diagram of the control device of variable frequency drives,
Wherein " 0 " indicates that control switch is in off state, and " 1 " indicates that control switch is conducting state.
In the first predetermined period T of the compressor operating, the control chip 11 controls the first switch module
In first control switch Sa constant conductions and control it is corresponding second control switchLasting shutdown；In the first switch
Mould the first control switch Sa conductings in the block and corresponding second control switchIt is described after first preset time T 1 of shutdown
Control chip 11 controls the second switch mould the first control switch Sb in the block and is connected and controls corresponding second control switchShutdown；In the first switch mould the first control switch Sa conductings in the block and corresponding second control switchShutdown
After second preset time T 2, the control chip 11 controls the third switching molding the first control switch Sc in the block and is connected and controls
Make corresponding second control switchShutdown, second preset time T 2 are more than first preset time T 1 and described second
Preset time T 1 is in first predetermined period.
The first predetermined period T is switch periods described in the present embodiment, in first predetermined period T, controls chip
11 control one of which switching moldings the first control switch constant conduction in the block, the corresponding lasting shutdown of first control switch, example
The first control switch Sa constant conductions of first switch module are such as controlled, and control the second control switch of first switch module
Lasting shutdown.Then later the first preset time T 1 and the second preset time T 2 control second switch module and third in succession
Switching molding control switch in the block is opened, another control switch is closed.It is hereby achieved that in a switch periods
It is interior, by keeping one of which switching molding control switch constant conduction in the block, another lasting shutdown of control switch, energy
The change frequency for reducing two secondary controls switch, compared to sequence on or off control switch subtracts again after a period of time has passed at present
On-off times twice are lacked, therefore have reduced current loss, improved operation power consumption, has had simultaneously for external radiation harmony wave
The modulation system of certain improvement, this control switch can also shorten the development time of developer, promote properties of product design.
Further, operation when the technical program can be adapted for the compressor slow-speed of revolution is modulated, low when refrigerator is run
Rotating speed operating status carries out voltage modulated using the technical program, and continuous modulation mode then may be used in middle high rotating speed.
It should be noted that 1 and second preset time T 2 of the first preset time T therein is electricity when being adjusted according to voltage
The amplitude of sine wave is pressed to determine, the second preset time T 2 can be more than the first preset time T 1, the first preset time T 1 and second
Preset time T 2 is in the first predetermined period, and the second preset time T 2 can be adjusted in real time with the first preset time T 1
It is whole, incidence relation is not present between the two.
Further, the control chip 11 is additionally operable in the first switch mould the first control switch Sa conductings in the block
And corresponding second control switchAfter the third preset time T 3 of shutdown, the third switching molding in the block described first is controlled
Control switch Sc is turned off and is controlled corresponding second control switchConducting, it is pre- that the third preset time T 3 is more than described second
If time T2, and the third preset time T 3 is also in the first predetermined period T.
The control chip 11 is additionally operable to be connected in the first switch mould the first control switch Sa in the block and corresponding
Second control switchAfter 4th preset time T 4 of shutdown, the second switch mould the first control switch in the block is controlled
Sb is turned off and is controlled corresponding second control switchConducting, the 4th preset time T 4 are more than the third preset time
T3, and the 4th preset time T 4 is also in the first predetermined period T.
It is understood that a complete switch periods also need other than changing the on off state of each control switch
The on off state of each control switch is recovered into the state when switch periods start.And hence it is also possible in first switch mould
First control switch Sa constant conductions in the block, corresponding second control switchThe third preset time T 3 persistently turned off and
The first control switch Sc shutdowns during the control of control third switchs in succession after four preset time Ts 4 and corresponding second control
SwitchConducting, the first control switch Sb during the second control switchs are turned off, the second control switchConducting.It is complete by one
The control on off state of whole switch periods controls, and can reduce by four on-off times, so the electric current damage of control on off state variation
Mistake is also much less, and improves operation power consumption.
It should be noted that control switch after changing on off state, needs to keep a timing in corresponding on off state
Between, the effect for extending control switch life can be played in this way, therefore first switch mould the first control switch Sa in the block is persistently led
Logical and corresponding second control switchAfter the second preset time T 2 persistently turned off, state retention time can be set, this is opened
The duration of off status retention time can be equal to the duration of the second preset time T 2, can also be to be set according to actual needs
, the on off state retention time be first switch mould it is in the block first control switch Sa constant conductions and second control open
It closesAfter the second preset time T 2 being continuously turned off, before third preset time T 3.
Further, the on or off of switch is controlled in variable frequency drives to be changed with the period, and N is being have passed through
After a predetermined period, wherein N ∈ [1, n], further, N is integer, in order to prevent because keep for a long time constant conduction state or
Lasting off state is kept so that control switchs and its circuit aging, the control that can also be turned off to constant conduction or persistently are opened
Pass switches over.Such as can be by the second predetermined period after the N number of first predetermined period T of the compressor operating
It is interior, it controls the first switch mould the first control switch Sa in the block and persistently turns off, and control corresponding second control and open
It closes and continuesConducting.It can also be the second predetermined period after the N number of first predetermined period T of the compressor operating
It is interior, the second switch mould the first control switch Sb constant conductions in the block are controlled, and control corresponding second control switch
Lasting shutdown can also be that the control second switch mould the first control switch Sb in the block is persistently turned off, and control corresponding
Second control switchConstant conduction can also be that the control third switching molding the first control switch Sc in the block is persistently led
It is logical, and control corresponding second control switchLasting shutdown can also be the first control in the block of the control third switching molding
System switch Sc is persistently turned off, and controls corresponding second control switchConstant conduction.Need to illustrate when, control mould second
A control switch constant conduction in block or third control module first is controlled originally when another control switch persistently turns off
Constant conduction, the second control do not switch molding the first control switch Sa in the blockIt does not turn off persistently.By cycle hold
The continuous switching control turned off and the control of constant conduction switchs, can prevent control switch and its circuit aging, prolong the service life.
The application also proposes a kind of refrigerator, which includes compressor and control the frequency conversion drive of the compressor operating
Device, the refrigerator further include that the first control switch and second in the control variable frequency drives controls switch conduction or shutdown
The structure of control device, the control device can refer to above-described embodiment, and details are not described herein.Naturally, due to this implementation
The refrigerator of example uses the technical solution of the control device of above-mentioned variable frequency drives, therefore the refrigerator has above-mentioned frequency conversion drive
All advantageous effects of control device.
Referring to Fig. 4, the application also proposes a kind of control method of variable frequency drives, for by controlling the frequency conversion drive
In device three groups of switch modules parallel with one another it is corresponding first control switch and second control switch on or off with
Drive compressor operating；The corresponding first control switch of every group of switch module is connected with the second control switch, and corresponding
Three terminals of the first control switch compressor corresponding with the second control concatenated node of switch；The method packet
Include step：
Step S10, in the first predetermined period of the compressor operating, what is controlled in the variable frequency drives first opens
Guan Mo the first control switch constant conductions in the block, and the lasting pass of control the second control switch corresponding with the first control switch
It is disconnected；
Step S20, in the first switch mould the first control switch conduction in the block and corresponding second control switch pass
After the first disconnected preset time, second switch mould the first control switch conduction in the block in the variable frequency drives is controlled, and
Control the second switch mould the second control switch OFF in the block；
Step S30, in the first switch mould the first control switch conduction in the block and corresponding second control switch pass
After the second disconnected preset time, third switching molding the first control switch conduction in the block in the variable frequency drives is controlled, and
The third switching molding the second control switch OFF in the block is controlled, second preset time is more than first preset time
And second preset time is in first predetermined period.
The first predetermined period T is switch periods described in the present embodiment, in first predetermined period T, controls chip
11 control one of which switching moldings the first control switch constant conduction in the block, the corresponding lasting shutdown of first control switch, example
The first control switch Sa constant conductions of first switch module are such as controlled, and control the second control switch of first switch module
Lasting shutdown.Then later the first preset time T 1 and the second preset time T 2 control second switch module and third in succession
Switching molding control switch in the block is opened, another control switch is closed.It is hereby achieved that in a switch periods
It is interior, by keeping one of which switching molding control switch constant conduction in the block, another lasting shutdown of control switch, energy
The change frequency for reducing two secondary controls switch, compared to sequence on or off control switch subtracts again after a period of time has passed at present
Lack on-off times twice, therefore reduced current loss, improves operation power consumption.
It should be noted that 1 and second preset time T 2 of the first preset time T therein is electricity when being adjusted according to voltage
The amplitude of sine wave is pressed to determine, the second preset time T 2 can be more than the first preset time T 1, the first preset time T 1 and second
Preset time T 2 is in the first predetermined period, and the second preset time T 2 can be adjusted in real time with the first preset time T 1
It is whole, incidence relation is not present between the two.
Further, further include later continuing with reference to Fig. 4, the step S30：
Step S40, in the first switch mould the first control switch conduction in the block and corresponding second control switch pass
After disconnected third preset time, the third switching molding the first control switch OFF in the block and corresponding second control are controlled
Switch conduction processed, the third preset time is more than second preset time and the third preset time is pre- described first
If in the period；
Step S50, in the first switch mould the first control switch conduction in the block and corresponding second control switch pass
After the 4th disconnected preset time, the second switch mould the first control switch OFF in the block and corresponding second control are controlled
Switch conduction processed, the 4th preset time is more than the third preset time and the 4th preset time is pre- described first
If in the period.
It is understood that a complete switch periods also need other than changing the on off state of each control switch
The on off state of each control switch is recovered into the state when switch periods start.And hence it is also possible in first switch mould
First control switch Sa constant conductions in the block, corresponding second control switchThe third preset time T 3 persistently turned off and
The first control switch Sc shutdowns during the control of control third switchs in succession after four preset time Ts 4 and corresponding second control
SwitchConducting, the first control switch Sb during the second control switchs are turned off, the second control switchConducting.It is complete by one
The control on off state of whole switch periods controls, and can reduce by four on-off times, so the electric current damage of control on off state variation
Mistake is also much less, and improves operation power consumption.
It should be noted that control switch after changing on off state, needs to keep a timing in corresponding on off state
Between, the effect for extending control switch life can be played in this way, therefore first switch mould the first control switch Sa in the block is persistently led
Logical and corresponding second control switchAfter the second preset time T 2 persistently turned off, state retention time can be set, this is opened
The duration of off status retention time can be equal to the duration of the second preset time T 2, can also be to be set according to actual needs
, the on off state retention time be first switch mould it is in the block first control switch Sa constant conductions and second control open
It closesAfter the second preset time T 2 being continuously turned off, before third preset time T 3.
Further, referring to Fig. 5, in another embodiment, can also include after the step S50：
Step S60, in the second predetermined period after N number of first predetermined period of the compressor operating, control
The first switch mould lasting shutdown of the first control switch in the block, and control corresponding second control switch and persistently lead
Logical, wherein N is greater than or equal to 1.
Further, referring to Fig. 6, in another embodiment, can also include after the step S50：
Step S70, in the second predetermined period after N number of first predetermined period of the compressor operating, control
The second switch mould lasting shutdown of the first control switch in the block, and control corresponding second control switch and persistently lead
It is logical, or the control second switch mould the first control switch constant conduction in the block, and control corresponding second control
The lasting shutdown of switch, or the lasting shutdown of the first control switch in the block of the control third switching molding, and control correspondence
The second control switch constant conduction, or the control third switching molding the first control switch constant conduction in the block,
And the corresponding lasting shutdown of second control switch is controlled, wherein N is greater than or equal to 1.
Need to illustrate when, a control switch constant conduction in the second control module or third control module, separately
When one control switch persistently turns off, first in the first control module controls switch Sa not constant conductions, the second control originally
SwitchIt does not turn off persistently.By the switching control of the control switch for continue shutdown and constant conduction of cycle, can prevent
Control switch and its circuit aging, prolong the service life.
The application also proposes a kind of computer storage media, is stored thereon with the control program of variable frequency drives, the change
The Overall Steps of the control method such as above-mentioned variable frequency drives are realized when the control program of frequency driver is executed by processor.
It should be noted that herein, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that process, method, article or system including a series of elements include not only those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or system institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including this
There is also other identical elements in the process of element, method, article or system.
Above-mentioned the embodiment of the present application serial number is for illustration only, can not represent the quality of embodiment.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can add the mode of required general hardware platform to realize by software, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on this understanding, the technical solution of the application substantially in other words does the prior art
Going out the part of contribution can be expressed in the form of software products, which is stored in one as described above
In storage medium (such as ROM/RAM, magnetic disc, CD), including some instructions are used so that a multi-connected air conditioner equipment (can be
Mobile phone, computer, server, air conditioner or network equipment etc.) execute each embodiment of the application described in method.
The preferred embodiment that these are only the application is not intended to limit the scope of the claims of the application, every to utilize this Shen
Please equivalent structure or equivalent flow shift made by specification and accompanying drawing content, be applied directly or indirectly in other relevant skills
Art field includes similarly in the scope of patent protection of the application.
Claims (10)
1. a kind of control device of variable frequency drives, the variable frequency drives are connect with compressor, for driving the compressor
Operation；Wherein, the variable frequency drives include first switch module, second switch module and third switching molding parallel with one another
Block；The first switch module, the second switch module and the third switch module include first control switch with
And with it is described first control switch it is concatenated second control switch, the first switch module, the second switch module and
The third switch module corresponding described first controls switch company corresponding with the second control concatenated node of switch
Connect three terminals of the compressor, which is characterized in that the control device of the variable frequency drives includes control chip, is used for
Control the on or off of the first control switch and the second control switch；
Wherein, in the first predetermined period of the compressor operating, in first switch module described in the control chip controls
The first control switch constant conduction and control the corresponding lasting shutdown of second control switch；It is in the block in the first switch mould
After first preset time of the first control switch conduction and corresponding second control switch OFF, described in the control chip controls
Second switch mould the first control switch conduction in the block simultaneously controls corresponding second control switch OFF；In the first switch mould
After second preset time of the first control switch conduction in the block and corresponding second control switch OFF, the control chip control
It makes the third switching molding the first control switch conduction in the block and controls corresponding second control switch OFF, described second is pre-
If the time is more than first preset time and second preset time is in first predetermined period.
2. the control device of variable frequency drives as described in claim 1, which is characterized in that the control chip is additionally operable in institute
After stating first switch mould the first control switch conduction in the block and the third preset time of corresponding second control switch OFF, control
It makes the third switching molding first control switch OFF in the block and controls corresponding second control switch conduction, described the
Three preset times are more than second preset time, and the third preset time is in first predetermined period.
3. the control device of variable frequency drives as claimed in claim 2, which is characterized in that the control chip is additionally operable in institute
After stating first switch mould the first control switch conduction in the block and the 4th preset time of corresponding second control switch OFF, control
It makes the second switch mould first control switch OFF in the block and controls corresponding second control switch conduction, described the
Four preset times are more than the third preset time, and the 4th preset time is in first predetermined period.
4. the control device of variable frequency drives as claimed in claim 3, which is characterized in that the control chip is additionally operable in institute
It states in the second predetermined period after N number of first predetermined period of compressor operating, it is in the block to control the first switch mould
The lasting shutdown of first control switch, and corresponding second control switch constant conduction is controlled, wherein N is greater than or equal to 1.
5. the control device of variable frequency drives as claimed in claim 3, which is characterized in that the control chip is additionally operable in institute
It states in the second predetermined period after N number of first predetermined period of compressor operating, it is in the block to control the second switch mould
First control switch constant conduction, and control the corresponding lasting shutdown of second control switch, or the control second switch mould
The lasting shutdown of first control switch in the block, and control corresponding second control switch constant conduction, or the control third
Switching molding the first control switch constant conduction in the block, and control the corresponding lasting shutdown of second control switch, or control institute
The lasting shutdown of the first control switch in the block of third switching molding is stated, and controls corresponding second control switch constant conduction, wherein N
More than or equal to 1.
6. a kind of refrigerator, including compressor and the variable frequency drives for controlling the compressor operating, which is characterized in that the refrigerator
Further include the first control switch in the control variable frequency drives and the second control switch conduction or the control device of shutdown, institute
State the control device that control device is the variable frequency drives as described in any one of claim 1-5.
7. a kind of control method of variable frequency drives, for by controlling three groups of switches parallel with one another in the variable frequency drives
The on or off of the corresponding first control switch of module and the second control switch is to drive compressor operating；Every group of switch
The corresponding first control switch of module is connected with the second control switch, and the corresponding first control switch and the second control
System switchs three terminals that concatenated node corresponds to the compressor；It is characterised in that it includes step：
In the first predetermined period of the compressor operating, the first switch mould in the block in the variable frequency drives is controlled
One control switch constant conduction, and control the lasting shutdown of the second control switch corresponding with the first control switch；
First in the first switch mould the first control switch conduction in the block and corresponding second control switch OFF is default
After time, second switch mould the first control switch conduction in the block in the variable frequency drives is controlled, and control described second
Switching molding the second control switch OFF in the block；
Second in the first switch mould the first control switch conduction in the block and corresponding second control switch OFF is default
After time, third switching molding the first control switch conduction in the block in the variable frequency drives is controlled, and control the third
Switching molding the second control switch OFF in the block, second preset time are more than first preset time and described second in advance
If the time is in first predetermined period.
8. the control method of variable frequency drives as claimed in claim 7, which is characterized in that described in the first switch module
In first control switch conduction and it is corresponding second control switch OFF the second preset time after, control the frequency conversion drive
Third switching molding the first control switch conduction in the block in device, and control the third switching molding the second control switch in the block
Further include after the step of shutdown：
It is default in the third of the first switch mould the first control switch conduction in the block and corresponding second control switch OFF
After time, the third switching molding the first control switch OFF in the block and corresponding second control switch conduction, institute are controlled
Third preset time is stated more than second preset time and the third preset time is in first predetermined period；
The 4th in the first switch mould the first control switch conduction in the block and corresponding second control switch OFF is default
After time, the second switch mould the first control switch OFF in the block and corresponding second control switch conduction, institute are controlled
The 4th preset time is stated more than the third preset time and the 4th preset time is in first predetermined period.
9. the control method of variable frequency drives as claimed in claim 8, which is characterized in that further include after all steps：
In the second predetermined period after N number of first predetermined period of the compressor operating, the first switch is controlled
The mould lasting shutdown of the first control switch in the block, and control corresponding second control switch constant conduction, wherein N be more than or
Equal to 1.
10. the control method of variable frequency drives as claimed in claim 8, which is characterized in that further include after all steps：
In the second predetermined period after N number of first predetermined period of the compressor operating, the second switch is controlled
The mould lasting shutdown of the first control switch in the block, and control corresponding second control switch constant conduction, or control institute
Second switch mould the first control switch constant conduction in the block is stated, and controls the corresponding lasting shutdown of second control switch,
Or the lasting shutdown of the first control switch in the block of the control third switching molding, and control corresponding second control switch
Constant conduction, or the control third switching molding the first control switch constant conduction in the block, and control corresponding the
The two lasting shutdowns of control switch, wherein N are greater than or equal to 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810061320.6A CN108306539A (en) | 2018-01-22 | 2018-01-22 | Control device, method and the refrigerator of variable frequency drives |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810061320.6A CN108306539A (en) | 2018-01-22 | 2018-01-22 | Control device, method and the refrigerator of variable frequency drives |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108306539A true CN108306539A (en) | 2018-07-20 |
Family
ID=62866290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810061320.6A Pending CN108306539A (en) | 2018-01-22 | 2018-01-22 | Control device, method and the refrigerator of variable frequency drives |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108306539A (en) |
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| CN1658486A (en) * | 2004-02-10 | 2005-08-24 | 株式会社电装 | Apparatus for controlling three-phase AC motor based on two-phase modulation technique |
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| CN103368498A (en) * | 2012-03-29 | 2013-10-23 | 兄弟工业株式会社 | Motor control device |
| CN104121173A (en) * | 2013-04-23 | 2014-10-29 | 广东美的制冷设备有限公司 | Control method and control device of air conditioner compressor |
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| CN1658486A (en) * | 2004-02-10 | 2005-08-24 | 株式会社电装 | Apparatus for controlling three-phase AC motor based on two-phase modulation technique |
| CN1953317A (en) * | 2005-10-18 | 2007-04-25 | 三星电子株式会社 | Device for preheating compressor and method thereof |
| CN103368498A (en) * | 2012-03-29 | 2013-10-23 | 兄弟工业株式会社 | Motor control device |
| CN104121173A (en) * | 2013-04-23 | 2014-10-29 | 广东美的制冷设备有限公司 | Control method and control device of air conditioner compressor |
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Application publication date: 20180720 |