CN1258958A - Harmonic suppression equipment for air conditioner and its suppression method - Google Patents
Harmonic suppression equipment for air conditioner and its suppression method Download PDFInfo
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- CN1258958A CN1258958A CN99109426A CN99109426A CN1258958A CN 1258958 A CN1258958 A CN 1258958A CN 99109426 A CN99109426 A CN 99109426A CN 99109426 A CN99109426 A CN 99109426A CN 1258958 A CN1258958 A CN 1258958A
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- input
- power
- voltage
- outdoor temperature
- harmonic
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- 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
-
- 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
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/70—Regulating power factor; Regulating reactive current or power
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- 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
- H02M1/12—Arrangements for reducing harmonics from ac input or output
-
- 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
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Physics & Mathematics (AREA)
- Air Conditioning Control Device (AREA)
- Inverter Devices (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
A compressor 160 of an air conditioner is supplied from a power input 1 through a rectifier 100 and inverter 150. Power factor is controlled to reduce harmonics by short-circuiting the power line between the rectifier 100 and inverter 150 for time periods synchronised with zero crossings of the power input voltage and dependent on both the compressor drive frequency and the output of an outdoor temperature sensor which determines whether or not the compressor is in an overload condition.
Description
The present invention relates to be suitable for produce the inverter air conditioner of the variable operating frequency of compressor, the particularly a kind of harmonic wave suppression equipment and inhibition method thereof of the air conditioner of the harmonic component of generation when being suitable for eliminating air conditioner effectively and under overload conditions, operate according to refrigeration or heating productivity ratio.
As shown in Figure 1, inverter apparatus generally includes: converter 3 is used for the interchange AC power supplies from power input 1 input is transformed into direct current DC power supply; Controller 5 is used for determining that according to the instruction of outdoor situation and indoor unit the operating frequency of compressor 9 is with the output inverter drive signal; With inverter 7, be used for drive signal according to controller 5 output and make power transistor (not shown) alternate conduction or end, become the three-phase AC power supplies with the DC power conversion that converter 3 is exported.
In the inverter apparatus of this structure, when ac-input power supply is added on the power input 1, the bridge rectifier 11 of ac-input power supply on converter 3 is rectified into predetermined DC power supply, and the ripple component that contains in the DC power supply by 11 rectifications of smmothing capacitor C1 filtering bridge rectifier.
At this moment, inverter 7 is used for becoming three-phase (U phase, V phase, W phase) AC power supplies according to the alternately conducting or by 6 power transistor (not shown) of the drive signal of controller 5 output with the DC power conversion that converter 3 is exported, thus Driven Compressor 9.
As mentioned above, the converter 3 that ac-input power supply is transformed into the DC power supply utilize smmothing capacitor C1 than high capacitance, so that obtain to have the DC power supply of ripplet.Yet, there is following problem: thus input current is subjected to the influence distortion of smmothing capacitor C1 to become the harmonic component that non-sinusoidal waveform contains increase, so that situations such as the operating trouble of power capacitor, blocking-up take place and reactive power is increased.
Because this situation, Europe and other developed country according to International Electrotechnical Commissio IEC suggestion set up the legal standards and the technical specification (EN 55022) of harmonic wave, the Electrical and Electronic product that does not therefore satisfy the IEC standard does not allow outlet.
So air conditioner is designed to satisfy harmonic standard (EN 55022), particularly when inverter 7 was switched on Driven Compressor 9, harmonic component significantly increased, therefore must development harmonic wave suppression equipment.
As shown in Figure 2, as traditional harmonic wave suppression equipment of air conditioner, zero-voltage detector 13 and harmonic shutter 15 are set on traditional inverter apparatus.Here, zero-voltage detector 13 detect from the no-voltage point of the ac-input power supply of power output end 1 input and from no-voltage point to controller 5 input pulse signals; The harmonic wave that presets at controller 5 suppresses time durations, and harmonic shutter 15 short circuit on the back edge of the pulse signal of zero-voltage detector 13 inputs connects just (+) power line and negative (-) power line of converter 3 and inverter 7, thereby makes current flowing.
In the harmonic wave suppression equipment of the air conditioner that so constitutes, when when power input 1 applies ac-input power supply, ac-input power supply is transformed device 3 and is transformed into the DC power supply, inverter 7 is according to the drive signal conducting of controller 5 outputs with by 6 power transistor (not shown), become three-phase (U phase, V phase, W phase) AC power supplies with the DC power conversion that converter 3 is exported, thus Driven Compressor 9.
When compressor 9 started, current waveform (b) was gone up the consumed current amount with load (compressor) and is lagged behind voltage pro rata, thereby as shown in Figure 4, generated current waveform (b) and voltage waveform (a) thus between phase difference increased harmonic component.
So, in order to eliminate this harmonic component, detect from the no-voltage point of the ac-input power supply of voltage input end 1 input by zero-voltage detector 13, so as when voltage waveform (a) to be on the no-voltage point to controller 5 input pulse signals (c).
At the harmonic wave that presets back at the pulse signal (c) of zero-voltage detector 13 input of controller 15 between inhibition period along driving harmonic shutter 15, connect just (+) power line of converter 3 and inverter 7 and bear (-) power line with short circuit so that during the short time, arbitrarily produce current waveform, thereby reduced the phase difference between current waveform (b) and the voltage waveform (a), so suppressed harmonic component, as shown in Figure 5.
Therebetween, when compressor 9 is operated with low operating frequency, thereby current sinking has also reduced the phase difference between current waveform (b) and the voltage waveform (a), when compressor 9 during with the high workload frequencies operations, thereby current sinking also increases the phase difference that has increased between current waveform (b) and the voltage waveform (a).This moment, controller 5 foundation suppressed the time with the proportional harmonic wave of the operating frequency of compressor 9.
Then, when the harmonic wave inhibition time that controller 5 is set up according to the operating frequency of compressor 9 finished, harmonic shutter 15 was turned off.
Yet, in the harmonic wave suppression equipment of described prior art, there is following problem: when executable operations time-harmonic wave component under overload conditions can not effectively be suppressed, this be because harmonic shutter 15 only with the harmonic wave of the proportional foundation of operating frequency of compressor 9 suppress the cycle during start, and do not consider that the phase difference between voltage waveform between overcharge period (a) and current waveform (b ') becomes greater than the situation of the phase difference between voltage waveform (a) and the current waveform (b), even when compressor 9 is operated with same operating frequency, also be like this, as shown in Figure 6.
The invention discloses a kind of technical scheme that addresses the above problem, the harmonic wave of air conditioner suppression equipment and the inhibition method thereof of providing is provided, they are suitable for detecting outdoor temperature and being suitable for suppressing the time increasing than harmonic wave longer during the normal load situation during the overload conditions for distinguishing of overload conditions, thereby suppressed harmonic component effectively, can satisfy the standard (EN 55022) that irrespectively suppresses the IEC of harmonic current with load variations like this.
According to one object of the present invention, a kind of harmonic wave suppression equipment of air conditioner is provided, this air conditioner comprises: convertor device is used for the ac-input power supply of power input is transformed into the DC power supply; DC-to-AC converter is used for the three-phase AC power supplies that becomes expected frequency at the DC of convertor device up conversion power conversion; Drive the compressor that rotates with the three-phase AC power supplies by DC-to-AC converter output, wherein said harmonic wave suppression equipment comprises:
The no-voltage checkout gear is used to detect the no-voltage point from the input voltage of power input;
The outdoor temperature checkout gear is used to detect outdoor temperature;
Control device is used to distinguish that the outdoor temperature that the outdoor temperature checkout gear detects is overload conditions or normal load situation, if outdoor temperature is overload conditions then the harmonic wave inhibition time was increased to than the time longer under the normal load situation; With
Harmonic suppression apparatus, thus be used to make the synchronous short circuit power of compressor line of no-voltage point of the input voltage of no-voltage checkout gear input.
According to another object of the present invention, a kind of harmonic suppressing method of air conditioner is provided here, this air conditioner is adapted to the AC power supplies from power input output is transformed into DC power supply and the three-phase AC power supplies that the DC power conversion of conversion is become expected frequency operate compressor subsequently, and this method may further comprise the steps:
Set up the driving time of the harmonic suppression apparatus that matches with the compressor operating frequency;
Detection is from the no-voltage point of the input voltage of power input input;
Detecting outdoor temperature, is overload or normal load to distinguish outdoor temperature;
When outdoor temperature is the overload conditions of overload in the discrimination step, with the longer time durations short circuit power of compressor line of driving time of the harmonic suppression apparatus set up than the time establishment step; With
When outdoor temperature is the normal load situation of overload in the discrimination step, with the driving time short circuit power of compressor line of the harmonic suppression apparatus set up at the time establishment step.
In order to understand characteristic of the present invention and purpose better, following explaining will be carried out in conjunction with the accompanying drawings.
Fig. 1 is the circuit block diagram of conventional inverter equipment;
Fig. 2 is the block diagram with the corresponding harmonic wave suppression equipment of prior art;
Fig. 3 is the timing chart from the no-voltage point output of input supply voltage;
Fig. 4 is the voltage and current oscillogram before harmonic shutter is driven;
Fig. 5 is the voltage and current oscillogram of harmonic shutter when being driven;
Fig. 6 be with corresponding overload of prior art and normal load situation under the voltage and current waveform;
Fig. 7 is the block diagram of harmonic wave suppression equipment of the air conditioner of explanation one embodiment of the invention;
Fig. 8 is the harmonic wave suppression equipment physical circuit figure of the air conditioner of explanation one embodiment of the invention;
Fig. 9 is the flow chart that the harmonic wave of explanation air conditioner of the present invention suppresses operation sequence;
Figure 10 is the voltage and current oscillogram under overload of the present invention and normal load situation.
Describe the preferred embodiments of the present invention with reference to the accompanying drawings in detail.
Fig. 7 is the block diagram of harmonic wave suppression equipment of the air conditioner of explanation one embodiment of the invention, and Fig. 8 is the harmonic wave suppression equipment physical circuit figure of the air conditioner of explanation one embodiment of the invention.
As shown in Figure 7 and Figure 8, convertor device 100 rectifications and the ac-input power supply of smoothly importing from power input 1 are transformed into it DC power supply then; No-voltage checkout gear 110 detects from the no-voltage point of the ac-input power supply of power input 1 input, and no-voltage checkout gear 110 comprises filter unit 112, photoelectrical coupler 114, first switch element 116 and second switch unit 118.
Filter unit 112 is provided with and is used for resistor R 1 and R2 and capacitor C1 and the C2 of filtering from the power supply noise component of the ac-input power supply of power input 1 input.Photoelectrical coupler 114 is used to receive filtered unit 112 and removes the ac-input power supply of power supply noises and begin operation at the no-voltage point of ac input voltage.
When photoelectrical coupler 114 began to operate, first switch element 116 that is provided with resistor R 3～R6, transistor T R1 and capacitor C3 received the voltage VCC1 that applies from the outside, after this begins operation; Second switch unit 118 comprises resistor R 7～R10, transistor T R2 and capacitor C4, and second switch unit 118 receives the voltage VCC1 that applies from the outside, conducting work after this when first switch element 116 is started working.
In addition, outdoor temperature checkout gear 120 is used to detect the outdoor temperature according to the operation change of air conditioner, and it comprises: outdoor temperature detector 122, and its resistance value changes according to outdoor temperature; Resistance R 15 is used to share the resistance value that changes with outdoor temperature detector 122; Capacitor C9 is used for the noise component(s) that the voltage signal of filtering resistor R 15 and outdoor temperature detector 122 dividing potential drops contains; With resistor R 16, be used for the voltage signal by capacitor C9 filtering noise component is input to control device (explanation after a while).
The switching signal of harmonic suppression apparatus 140 receiving control devices 130 outputs is to suppress harmonic component, so that the phase place of input current is near the phase place of input voltage, it is provided with the 3rd switch element 142, hybrid component 144 (below become hybrid element) and power switch unit 146.
The 3rd switch element 142 comprises capacitor C5～C8, resistor R 11～R13, transistor RT3 and diode D1, and this makes it can be according to the high-level control signal of control device 140 output to hybrid element 144 supply of current.Hybrid element 144 receives from the electric current of the 3rd switch element 142 voltage signal with the output high level.
Power switch unit 146 comprises resistor R 14, transistor T R4, diode D4 and power supply noise choke-transformer L1 and L2, and it connects just (+) power line and negative (-) power line of DC-to-AC converter (explanation after a while) and convertor device 100 according to the high level voltage signal shorts of hybrid element 144 inputs.
DC-to-AC converter 150 is according to the alternately conducting and by 6 power transistor (not shown) of the drive signal of control device 130 output, (U mutually with three-phase with the variable frequency that the DC power conversion of convertor device 100 output become to be applicable to compressor 160 operating frequencies, the V phase, the W phase) AC power supplies is supplied with compressor 160 to it then.
The following describes the work effect and the inhibition method thereof of harmonic wave suppression equipment of the air conditioner of such formation.
When ac-input power supply when power input 1 is supplied with, ac-input power supply is transformed apparatus 100 and is transformed into the DC power supply, convertor device 150 is according to the drive signal conducting of control device 130 outputs with by 6 transistor (not shown), so that the DC power conversion of convertor device 100 outputs is become three-phase AC power supplies and Driven Compressor 160.
When compressor 160 was driven, the ground lagging voltage that is in proportion of the electric consumption of current waveform (b) and load (compressor) had generated the phase difference between current waveform (b) and the voltage waveform (a), as shown in Figure 4, so increased harmonic component.
In the present invention, be provided with no-voltage checkout gear 110, outdoor temperature checkout gear 120, control device 130 and harmonic suppression apparatus 140, and carry out control so that current phase near voltage-phase, as shown in Figure 9.
Fig. 9 is the flow chart that the harmonic wave of explanation air conditioner of the present invention suppresses operation sequence.Here S is defined as step.
At first, at step S1, control device 130 is set up the master data (driving time) of harmonic suppression apparatus 140 in the ROM table, is used for increasing or reduce the harmonic wave inhibition time (t) according to the operating frequency of compressor 160.The value of the master data of harmonic suppression apparatus 140 has shortened the driving time of harmonic suppression apparatus 140, and this is because when the operating frequency of compressor 160 reduced, current sinking also reduced, thereby has reduced the phase difference between voltage waveform and the current waveform.When the operating frequency of compressor 160 increased, current sinking also increased, thereby has increased the phase difference between voltage waveform and the current waveform, and the driving time of harmonic suppression apparatus 140 just is extended with the control harmonic wave and suppresses the time (t) like this.
Then, at step S2, control device 130 is determined the operating frequency of compressor 160 according to the order of outdoor situation and indoor unit.At this moment, power supply noise component filtered unit 112 filterings of the ac-input power supply of power input 1 input also put on the photoelectrical coupler 114 of no-voltage checkout gear 110, and this photoelectrical coupler 114 is in the no-voltage point conducting of ac-input power supply.
When photoelectrical coupler 114 executable operations, transistor T R1 in first and second switch elements 116 and 118 and TR2 conducting, and the pulse signal synchronous with the no-voltage point of ac-input power supply (c) inputs to control device 130 from no-voltage checkout gear 110, as shown in Figure 3.
Then, at step S3, carry out the differentiation whether the voltage pulse of zero signal inputs to control device 130, if voltage pulse of zero signal (c) is not imported (situation of "No"), then the operation of repeated execution of steps S3 is transfused to up to voltage pulse of zero signal (c).
As the differentiation result on the step S3, if voltage pulse of zero signal (c) is transfused to (situation of "Yes"), then flow process enters step S4, with the resistance value that changes according to outdoor temperature on the Temperature Detector outside the sensing chamber 122, here resistance value and resistor R 15 dividing potential drops that detected by outdoor temperature detector 122 input to control device 130 then.
Then, at step S5, control device 130 becomes numerical data to the voltage analog data conversion from 120 inputs of outdoor temperature checkout gear, is overload conditions or normal load situation to differentiate this outdoor temperature.
Overload or normal load situation are determined suitably that by installation site and its type of air conditioner like this, for example when outdoor temperature surpassed 40 degrees centigrade, it was judged as the normal load situation.
Overload conditions can further be segmented as required.For example, during the cooling down operation when outdoor temperature is 40 ℃～45 ℃, it is known as first overload conditions, is known as second overload conditions when it surpasses 45 ℃.
Differentiation result as step S5, if outdoor temperature meets overload conditions (in the situation of "Yes"), flow process enters step S6, here control device 130 makes the master data value (t) of the harmonic suppression apparatus of setting up in the ROM table 140 increase Δ t, that is to say that the driving time of increase harmonic suppression apparatus 140 and the current sinking of increase are as many.
Simultaneously, differentiation result as step S5, if outdoor temperature meets normal load situation (in the situation of "No"), flow process enters step S7, and here control device 130 is determined the driving time (t) of the harmonic suppression apparatus 140 corresponding with the frequency of operation of compressor 160 according to the ROM table of setting up on step S1.
When the driving time of harmonic suppression apparatus 140 is to be that the overload or the differentiation of normal load situation are when determining according to outdoor temperature, flow process enters step S8, here, control device 130 is exported high-level control signal on the back edge of the pulse signal (c) of no-voltage checkout gear 110 inputs to harmonic suppression apparatus 140, and the harmonic wave that is used for determining in outdoor temperature suppresses time durations and drives harmonic suppression apparatus 140.
Then, harmonic suppression apparatus 140 is according to the transistor T R3 from high-level control signal conducting the 3rd switch element 142 of control device 130 inputs, with to hybrid element 144 supplying electric currents, thereby short circuit connects just (+) power line and negative (-) power line of convertor device 100 and DC-to-AC converter 150.
When just (+) power line and negative power line (-) were by short circuit, current waveform was arbitrarily formed during the short time, like this current waveform (b) and voltage waveform (a) thus between phase difference be reduced and suppressed harmonic component.
Simultaneously, because even compressor 160 is operated on same frequency, phase difference between voltage waveform between overcharge period (a) and the current waveform (b ') also becomes greater than the fact of the phase difference between voltage waveform (a) and the current waveform (b), even so between overcharge period, make the phase difference between voltage waveform (a) and the current waveform (b ') become less by increase the harmonic wave inhibition time during for overload conditions in outdoor temperature.
So, harmonic component is suppressed effectively and is irrelevant with load variations, thereby making the control operation of the current harmonics that fully satisfies EN55022 become possibility, this harmonic suppression apparatus can use on the humorous wave device of all electronic equipments that utilize inverter method like this.
As seeing from above-mentioned explanation, the harmonic wave suppression equipment and the method thereof of air conditioner of the present invention have the following advantages: detect outdoor temperature and whether suppress the time at the longer harmonic wave of overload conditions increase to differentiate, and in the overload conditions increase harmonic wave inhibition time longer, thereby can irrespectively satisfy the EN55022 standard that limits harmonic current with load variations than normal load situation.
Claims (6)
1. the harmonic wave suppression equipment of an air conditioner, this air conditioner comprises: convertor device is used for the ac-input power supply of power input is transformed into the DC power supply; DC-to-AC converter is used for the three-phase AC power supplies that becomes expected frequency at the DC of converter up conversion power conversion; Drive the compressor that rotates with the AC three phase mains by DC-to-AC converter output, wherein said equipment comprises:
The no-voltage checkout gear is used to detect the no-voltage point from the input voltage of power input;
The outdoor temperature checkout gear is used to detect outdoor temperature;
Control device, being used to differentiate the outdoor temperature that the outdoor temperature checkout gear detects is overload or normal load situation, if outdoor temperature is overload conditions then increases than harmonic wave longer in the normal load situation and suppress the time; With
Harmonic suppression apparatus, thus be used for the synchronous short circuit power of compressor line of no-voltage point with the input voltage of no-voltage checkout gear input.
2. equipment according to claim 1 wherein suppresses time durations at the harmonic wave that control device is determined, the harmonic suppression apparatus short circuit connects just (+) power line and negative (-) power line of convertor device and DC-to-AC converter.
3. equipment according to claim 1, wherein control device is stored the basic controlling value of controlling the driving time of harmonic suppression apparatus according to the operating frequency of compressor pro rata, and the outdoor temperature that detects according to the outdoor temperature checkout gear changes this basic controlling value.
4. the harmonic wave suppression equipment of an air conditioner, this equipment comprises: convertor device is used for the ac-input power supply of power input is transformed into the DC power supply; DC-to-AC converter is used for the three-phase AC power supplies that becomes expected frequency at the DC of converter up conversion power conversion; Drive the compressor that rotates with AC three phase mains, wherein comprise by reducing the equipment that phase difference between input current and the input voltage suppresses harmonic component by DC-to-AC converter output:
The no-voltage checkout gear is used to detect the no-voltage point from the input voltage of power input;
The outdoor temperature checkout gear is used to detect outdoor temperature;
Control device is used to export control signal so that make the no-voltage point of the phase place of input current and the input of no-voltage checkout gear synchronous and near the phase place of input voltage; With
Harmonic suppression apparatus, be used for short circuit power of compressor line, so that the control signal according to control device output makes the phase place of the phase place of input current near input voltage, wherein the control device differentiation is overload or normal load situation by the outdoor temperature of outdoor temperature checkout gear detection, if outdoor temperature is an overload conditions, then the driving time with harmonic suppression apparatus is increased to than longer in the normal load situation.
5. the harmonic suppressing method of an air conditioner, this air conditioner is applicable to the AC power supplies from power input output is transformed into DC power supply and the three-phase AC power supplies that the DC power conversion of conversion is become expected frequency and operate compressor subsequently that wherein this method may further comprise the steps:
Set up the driving time of the harmonic suppression apparatus that matches with the compressor operating frequency;
Detection is from the no-voltage point of the input voltage of power input input;
Detecting outdoor temperature, is overload or normal load to distinguish outdoor temperature;
When overload conditions that outdoor temperature in the overload discrimination step is, with than the driving time of the harmonic suppression apparatus of setting up in the time establishment step more for the moment between during short circuit power of compressor line; With
When outdoor temperature in the overload discrimination step when being the normal load situation, with the driving time short circuit power of compressor line of the harmonic suppression apparatus set up in the time establishment step.
6. method according to claim 5, wherein the harmonic wave during overload and the normal load situation suppresses step and further comprises the synchronous step of no-voltage point that detects the input voltage that detects in the step with no-voltage, thus a power line of short circuit compressor.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019980062569A KR100321244B1 (en) | 1998-12-30 | 1998-12-30 | Harmonic Suppression Device of Air Conditioner and Its Suppression Method |
| KR9862569 | 1998-12-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1258958A true CN1258958A (en) | 2000-07-05 |
| CN1148863C CN1148863C (en) | 2004-05-05 |
Family
ID=19569232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB991094263A Expired - Fee Related CN1148863C (en) | 1998-12-30 | 1999-06-30 | Harmonic suppression equipment for air conditioner and its suppression method |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR100321244B1 (en) |
| CN (1) | CN1148863C (en) |
| GB (1) | GB2345353B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102244460A (en) * | 2010-05-11 | 2011-11-16 | 联昌电子企业股份有限公司 | Power supply changeover system capable of being started at zero voltage and zero-voltage starting device thereof |
| CN106972491A (en) * | 2016-11-30 | 2017-07-21 | 上海新辉电器有限公司 | Switch cubicle harmonic shutter with multiple terminals monitoring device |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9050360B1 (en) * | 2010-12-27 | 2015-06-09 | Robert P. Scaringe | Apparatus for crankcase pressure regulation using only ambient air or coolant temperature |
| KR102105073B1 (en) * | 2013-04-25 | 2020-04-27 | 엘지전자 주식회사 | Harmonics suppressor and air conditioner including the same |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4876497A (en) * | 1988-09-20 | 1989-10-24 | Hc Power, Inc. | Power factor corrector |
| JP3578874B2 (en) * | 1996-08-30 | 2004-10-20 | 東芝キヤリア株式会社 | Power supply and power supply for air conditioner |
| JP3550485B2 (en) * | 1997-06-27 | 2004-08-04 | 東芝キヤリア株式会社 | DC power supply and air conditioner |
-
1998
- 1998-12-30 KR KR1019980062569A patent/KR100321244B1/en not_active IP Right Cessation
-
1999
- 1999-06-21 GB GB9914461A patent/GB2345353B/en not_active Expired - Fee Related
- 1999-06-30 CN CNB991094263A patent/CN1148863C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102244460A (en) * | 2010-05-11 | 2011-11-16 | 联昌电子企业股份有限公司 | Power supply changeover system capable of being started at zero voltage and zero-voltage starting device thereof |
| CN106972491A (en) * | 2016-11-30 | 2017-07-21 | 上海新辉电器有限公司 | Switch cubicle harmonic shutter with multiple terminals monitoring device |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100321244B1 (en) | 2002-03-08 |
| GB9914461D0 (en) | 1999-08-18 |
| GB2345353A (en) | 2000-07-05 |
| GB2345353B (en) | 2000-11-15 |
| KR20000045940A (en) | 2000-07-25 |
| CN1148863C (en) | 2004-05-05 |
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