CN101162871B - Method for prompting the accommodating range of air conditioner to electric network electric voltage and frequency, and device thereof - Google Patents
Method for prompting the accommodating range of air conditioner to electric network electric voltage and frequency, and device thereof Download PDFInfo
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Abstract
The invention relates to a method and apparatus for improving the accommodation of air-conditioners to power-grid voltage and frequency. The method includes the following steps: a. the voltage and frequency of a power-grid is tested; b1. the voltage and frequency of the detected power-grid are regulated and transmitted to the power-supply voltage of the compressor according to a proper logic; b2.at the same time, the regulated voltage and frequency are regulated and transmitted to the indoor/outdoor fan according to a proper logic. The invention is capable to automatically regulate the voltages of the compressor, the fan and other key components to achieve a relative wide voltage and frequency accommodation (220V plus or minus 20%, 45-65Hz) for the air-conditioner, and as a result, the air-conditioner can not only better adapt to stern environment of outdoor power-grid but also better adapt to different types of power-grids in a global scope. Thereby, the varieties of machine types are largely reduced; in terms of global sales, the overall operation cost of such type of air-conditioner products is saved effectively.
Description
Technical field
The present invention relates to outdoor air-conditioning, more particularly, relate to a kind of method and device thereof that promotes air-conditioning to the accommodation of line voltage and frequency.
Background technology
Compressor is the most critical parts of air-conditioning, its operating voltage range can only accomplish usually rated voltage ± 10%, operating frequency range can only accomplish usually rated frequency ± 3HZ.Narrower voltage and frequency adaptation scope make and can't adapt to harsh outdoor grid environment preferably by common air-conditioning (scope range of the fluctuation of voltage of outdoor grid is bigger, can reach usually ± 20%, and the frequency fluctuation scope can reach ± 5HZ); Narrower frequency adaptation scope makes that common air-conditioning can't simultaneous adaptation 50HZ and 60HZ electrical network, must adopt different machine types to come to adapt to respectively 50HZ or 60HZ electrical network usually.
The voltage adaptation scope of idle call blower fan also can only be accomplished rated voltage ± 15% usually, can't adapt to harsh outdoor grid environment preferably equally.
The mains frequency of each major country of the whole world has two kinds of 50HZ and 60HZ, and electric pressure then has 9 kinds more than at least, and wherein main just have 220V, 230V, 240V, 120V, 110V, a 115V.When the air-conditioning product of a company during towards global marketing, the air-conditioning of having to develop multiple model is to adapt to different electrical networks, and this can increase the cost of product in each links such as element buying, production, stock, maintenances undoubtedly.Obviously, if we can significantly promote the voltage and the frequency adaptation scope of air-conditioning, just can significantly reduce the type kind, thereby effectively practice thrift the Total Cost Ownership of this kind air-conditioning product.If can voltage and frequency adaptation scope be brought up to 220V ± 20%, 45～65HZ, then can well adapted 220,230,240V/50,60HZ electrical network.In fact, for 120V, 110V, 115V electrical network, under the situation of necessity, also can use through the mode of double fire wire input.Under the situation of double fire wire input, the practical power input voltage of air-conditioning is a line voltage, equals 1.732 times of phase voltage.For example, for the 120V electrical network, actual input voltage is 120V*1.732=209V, and this voltage obviously drops in the scope of 220V ± 20%.
Although there are several kinds of existing technical methods, can help to promote the voltage or the frequency adaptation scope of air-conditioning, they all exist significantly not enough, are described below.
Have the wide depressor of a kind of external can help to promote the voltage adaptation scope of air-conditioning, it is through the automatically switch tap of autotransformer of detection of grid voltage, and realizing wideer voltage power supply scope, but it can not improve the frequency adaptation scope.
The universal compressed machine of a kind of 50/60HZ is arranged, can help air-conditioning to realize being suitable for simultaneously the electrical network of two kinds of frequencies.But it is more limited to the lifting of frequency adaptation scope; Because the best operating point of its design is at 55HZ; Compressor all can not be operated in optimum state when 50HZ or 60HZ; Cause efficient to reduce, its lowest operating frequency generally can not reach 47HZ (50HZ-3HZ), and maximum operating frequency can not reach 63HZ (60HZ+3HZ).Certainly, the universal compressed machine of this 50/60HZ can not promote its voltage adaptation scope.And the power of the universal compressed machine of 50/60HZ is all less usually.
Also can utilize preposition frequency converter to make air-conditioning adapt to the voltage and the frequency range of broad, but there are problems such as compressor start difficulty, complicated circuit, complex algorithm, cost height, EMC index are not easy to reach in this method.
Summary of the invention
The technical problem that the present invention will solve is, to the above-mentioned defective of prior art, a kind of method and device thereof that promotes air-conditioning to the accommodation of line voltage and frequency is provided.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of method that promotes air-conditioning to the accommodation of line voltage and frequency, may further comprise the steps: a, detection of grid voltage and frequency; B1, according to detected line voltage and frequency, adjust supply power voltage by certain logic to compressor; B2, while are adjusted the supply power voltage to inside and outside blower fan according to detected line voltage by certain logic.
In the method for lifting air-conditioning of the present invention to the accommodation of line voltage and frequency; Said logic among the said step b1 is: when said voltage is higher than a predetermined ratio of fiducial value; Wherein, Fiducial value can be the line voltage grade point of each major country of the whole world: 220V, 230V, 240V, 120V, 110V, 115V or the like; And predetermined ratio can be provided with as required, and the power supply of compressor input is switched to the step-down tap of first autotransformer, reduces the supply power voltage of compressor; When said voltage is lower than a predetermined ratio of fiducial value, the power supply of compressor input is switched to the tap of boosting of first autotransformer, improve the supply power voltage of compressor; When in the predetermined ratio scope of said voltage in fiducial value, the power supply input of compressor is switched to the constant tap (being the power supply input tap of autotransformer, electric network source input just) of sustaining voltage of first autotransformer.
In the method for lifting air-conditioning of the present invention to the accommodation of line voltage and frequency; Said logic among the said step b2 is: when said voltage is higher than a predetermined ratio of fiducial value; Wherein, Fiducial value can be the line voltage grade point of each major country of the whole world: 220V, 230V, 240V, 120V, 110V, 115V or the like; And predetermined ratio can be provided with as required, and the power supply of blower fan input is switched to the step-down tap of second autotransformer, reduces the supply power voltage of blower fan; When said voltage is lower than a predetermined ratio of fiducial value, the power supply of blower fan input is switched to the tap of boosting of second autotransformer, improve the supply power voltage of blower fan; When in the predetermined ratio scope of said voltage in fiducial value, the power supply input of blower fan is switched to the constant tap (being the power supply input tap of autotransformer, electric network source input just) of sustaining voltage of second autotransformer.
In a preferred embodiment of the invention, fiducial value is set at 220V, predetermined ratio is set at 10% or 20%.
Preferably, for the 60HZ electrical network, fiducial value is set at 200V; For the 50HZ electrical network, fiducial value is set at 110V; And predetermined ratio can be carried out different settings as required.
In the method for lifting air-conditioning of the present invention to the accommodation of line voltage and frequency; Said step b1 also comprises: judge that said frequency is in the first frequency scope or in the second frequency scope; When said frequency during, get into step c in the first frequency scope; Otherwise, get into steps d;
C, when said voltage is higher than 242V (220V+10%), the power supply of compressor input is switched to first tap of the step-down 10% of first autotransformer; When voltage during, switch to the second constant tap of sustaining voltage at 198V～242V scope; When voltage is lower than 198V (220V-10%), switch to 15% the 3rd tap of boosting;
D, when detected voltage is higher than 230V, the power supply of compressor input is switched to the second constant tap of sustaining voltage that said first autotransformer switches; When voltage during, switch to 15% the 3rd tap of boosting at 198V～230V; When voltage is lower than 198V, switch to 25% the 4th tap of boosting.
In the method for lifting air-conditioning of the present invention to the accommodation of line voltage and frequency; The said logic of said step b2 is specially: when said voltage is higher than 242V (220V+10%), the supply power voltage of inside and outside blower fan is switched to first tap of the step-down 10% of second autotransformer switching; When voltage during, switch to the second constant tap of sustaining voltage at 220V ± 10% scope; When voltage is lower than 198V (220V-10%), switch to 15% the 3rd tap of boosting.
In the method for lifting air-conditioning of the present invention to the accommodation of line voltage and frequency; In said step b1 and b2; Also comprise: when voltage surpasses 264V (220V+20%) or is lower than 176V (220V-20%); The power supply input of compressor and inside and outside blower fan does not switch in any tap, throws off power supply, and air-conditioning is carried out the overvoltage/undervoltage protection.
Can promote simultaneously in the method for air-conditioning to the accommodation of line voltage and frequency of the present invention, said first autotransformer is used to adjust the supply power voltage to compressor and inside and outside blower fan.
Can promote simultaneously in the method for air-conditioning to the accommodation of line voltage and frequency of the present invention, said second autotransformer is used for the supply power voltage that outer blower fan is given in further adjustment, to adjust the wind speed of outer blower fan.
Can promote simultaneously in the method for air-conditioning to the accommodation of line voltage and frequency of the present invention, said first frequency scope is 45～55Hz.
Can promote simultaneously in the method for air-conditioning to the accommodation of line voltage and frequency of the present invention, said second frequency scope is 55～65Hz.
In the method for lifting air-conditioning of the present invention to the accommodation of line voltage and frequency, the return difference of voltage switching point all is 12V, and its function is the frequent switching when avoiding electrical network to fluctuate in a narrow margin.
Provide a kind of according to a further aspect in the invention and can promote the device of air-conditioning to the accommodation of line voltage and frequency simultaneously, comprising: detection module comprises voltage detecting circuit and frequency detection circuit, detection of grid voltage and frequency; Control module is used to gather line voltage and the frequency signal sent here by detection module, the driving execution module; Executive Module, the buck tap that is used to switch first and second autotransformer, adjustment voltage makes it to satisfy the normal range of operation of compressor and blower fan.
In the device of lifting air-conditioning of the present invention to the accommodation of line voltage and frequency, control module comprises control circuit, is used for voltage and frequency signal that the acquisition testing module transmits, sends control signal and gives Executive Module; Executive Module comprises switch driving circuit, the first switch element group, second switch unit group, the 3rd switch element group, first autotransformer and second autotransformer; Said switch driving circuit receives said control signal and drives the buck tap that first, second and third switch element group is switched first and second autotransformer.
In the device of lifting air-conditioning of the present invention to the accommodation of line voltage and frequency; Said control circuit transmits control signal to drive circuit according to the line voltage and the frequency that collect; Said drive circuit drives autotransformer according to control signal and switches tap, and said control signal drives the first switch element group and switches the logic of the buck tap of said first autotransformer and be:
Under the power grid environment in the frequency range of 45～55Hz, when said voltage is higher than 242V (220V+10%), switch to first tap of its step-down 10%; When voltage during, switch to the second constant tap of sustaining voltage at 198V～242V scope; When voltage is lower than 198V (220V-10%), switch to 15% the 3rd tap of boosting;
Under the power grid environment in the frequency range of 55～65Hz, when detected voltage is higher than 230V, switch to the second constant tap of sustaining voltage; When voltage during, switch to 15% the 3rd tap of boosting at 198V～230V; When voltage is lower than 198V, switch to 25% the 4th tap of boosting; When voltage surpasses 264V (+20%), do not switch in any tap, guarantee compressor disengagement power supply.
In the device of lifting air-conditioning of the present invention to the accommodation of line voltage and frequency; Said control circuit transmits control signal to drive circuit according to the line voltage and the frequency that collect; Said drive circuit drives autotransformer according to control signal and switches tap, and the logic that said control signal driving second switch unit group is switched the buck tap of said second autotransformer is:
When said voltage is higher than 242V (220V+10%), switch to first tap of its step-down 10%; When voltage during, switch to the second constant tap of sustaining voltage at 198V～242V scope; When voltage is lower than 198V (220V-10%), switch to 15% the 3rd tap of boosting. When voltage surpasses 264V (+20%), do not switch in any tap, guarantee inside and outside blower fan disengagement power supply.
In the device of lifting air-conditioning of the present invention to the accommodation of line voltage and frequency; Said control circuit is according to detected outdoor environment temperature; Transmit control signal to said drive circuit; The buck tap that said the 3rd switch element group of said driving circuit drives is switched said second autotransformer changes outer blower fan supply power voltage, thereby makes the rotating speed respective change of outer blower fan.
In the device of lifting air-conditioning of the present invention to the accommodation of line voltage and frequency, said control circuit comprises microcontroller, and said controller is a single-chip microcomputer.
The lifting air-conditioning of embodiment of the present invention is to the method and the device thereof of the accommodation of line voltage and frequency; Has following beneficial effect: voltage and frequency adaptation scope (176V～264V with broad; 45～65HZ); Compressor all works in more excellent state when 50HZ or 60HZ, thereby makes it not only can adapt to harsh outdoor grid environment preferably, and can adapt to electrical networks dissimilar in the global range better; Significantly reduce the type kind, at the Total Cost Ownership that needs effectively to practice thrift under the situation of global marketing this kind air-conditioning product.
Description of drawings
To combine accompanying drawing and embodiment that the present invention is described further below, in the accompanying drawing:
Fig. 1 is that the present invention promotes the structured flowchart of air-conditioning to the device electric-control system of the accommodation of line voltage and frequency.
Embodiment
Lifting air-conditioning of the present invention is following to the principle of the method for the accommodation of line voltage and frequency and device thereof:
Compressor is asynchronous machine normally, according to the voltage balance equation of asynchronous machine, under the situation of ignoring the stator leakage impedance, has:
U≈E＝4.44*f*N*k*Φ
Wherein U is a supply voltage, and E is the induced electromotive force of stator winding, and f is a supply frequency, and N is the winding coil number of turn, and k is a winding distribution ratio, and Φ is a magnetic flux.
According to this equation, when supply frequency changed, if voltage does not change, then magnetic flux must change.During the main flux of magnetic flux during greater than normal operation, then magnetic circuit supersaturation and exciting current is increased, power factor (PF) reduces, and will burn motor when serious; Magnetic flux is during less than the magnetic flux of normal operation, and then motor changes apart from descending.The magnetic Circuit Design of motor all is that during the motor operation, magnetic flux should remain unchanged basically according to the design of certain magnetic flux, and magnetic flux remains unchanged when making frequency change, and then U/f should be definite value.
Lifting air-conditioning of the present invention utilizes this principle just to the method and the device thereof of the accommodation of line voltage and frequency; When mains frequency changes; According to detected mains frequency and line voltage; Drive the buck tap that multiselect one switches set is switched autotransformer by certain logic, thereby the voltage of compressor is supplied with in adjustment, and its voltage frequency ratio is remained unchanged basically; Thereby significantly promote the accommodation of compressor, and then significantly promote the accommodation of this air-conditioning mains frequency to mains frequency.
It is of the present invention that can to promote air-conditioning simultaneously following to the principle of the accommodation of line voltage and frequency:
According to detected line voltage; In conjunction with detected mains frequency; Drive multiselect one switches set is switched autotransformer by certain logic buck tap; Thereby the voltage of compressor, inner blower and outer blower fan is supplied with in adjustment, the supply power voltage of compressor and blower fan is maintained in the normal working voltage scope all the time, and then significantly promote the accommodation of air-conditioning to line voltage.
Concrete autotransformer tap changing logic must guarantee that (the suitable voltage of compressor and blower fan can both be supplied with in 220V ± 20%, 45～65HZ), and guarantees that the voltage frequency ratio of compressor remains unchanged basically under various possible frequencies and voltage situation.The used switch logic of the present invention is divided into two kinds by mains frequency, i.e. the tap changing logic of the tap changing logic of 50HZ electrical network and 60HZ electrical network.Concrete tap changing logic is please with reference to following description.
A kind ofly can promote the method for air-conditioning simultaneously, may further comprise the steps: a, detection of grid voltage and frequency the accommodation of line voltage and frequency; B1, according to detected line voltage and frequency, adjust supply power voltage by certain logic to compressor; B2, while are adjusted the supply power voltage to inside and outside blower fan according to detected line voltage by certain logic.
Logic among the step b1 is: when voltage is higher than a predetermined ratio of fiducial value, the power supply of compressor input is switched to the step-down tap of first autotransformer, reduce the supply power voltage of compressor; When voltage is lower than a predetermined ratio of fiducial value, the power supply of compressor input is switched to the tap of boosting of first autotransformer, improve the supply power voltage of compressor; When in the predetermined ratio scope of voltage in fiducial value, the power supply input of compressor is switched to the constant tap of sustaining voltage of first autotransformer, the i.e. power supply of autotransformer input tap, electric network source input just.
Logic among the step b2 is: when voltage is higher than a predetermined ratio of fiducial value, the power supply of blower fan input is switched to the step-down tap of second autotransformer, reduce the supply power voltage of blower fan; When voltage is lower than a predetermined ratio of fiducial value, the power supply of blower fan input is switched to the tap of boosting of second autotransformer, improve the supply power voltage of blower fan; When in the predetermined ratio scope of voltage in fiducial value, the power supply input of blower fan is switched to the constant tap of sustaining voltage of second autotransformer, the i.e. power supply of autotransformer input tap, electric network source input just.Wherein, when said voltage is higher than 242V (220V+10%), the supply power voltage of inside and outside blower fan is switched to first tap of the step-down 10% of second autotransformer switching; When voltage during, switch to the second constant tap of sustaining voltage at 220V ± 10% scope; When voltage is lower than 198V (220V-10%), switch to 15% the 3rd tap of boosting.
Preferably, step b1 also comprises: determination frequency is in the first frequency scope or in the second frequency scope, when frequency during in the first frequency scope, gets into step c; Otherwise, get into steps d;
C, when voltage is higher than 242V (220V+10%), the power supply of compressor input is switched to first tap of the step-down 10% of first autotransformer; When voltage during, switch to the second constant tap of sustaining voltage at 220V ± 10% scope; When voltage is lower than 198V (220V-10%), switch to 15% the 3rd tap of boosting;
D, when detected voltage is higher than 230V, the power supply of compressor input is switched to the second constant tap of sustaining voltage that first autotransformer switches; When voltage during, switch to 15% the 3rd tap of boosting at 198V～230V; When voltage is lower than 198V, switch to 25% the 4th tap of boosting.
In addition, at step b1 and b2, also comprise: when voltage surpassed 264V (220V+20%) or is lower than 176V (220V-20%), the power supply input of compressor and inside and outside blower fan did not switch in any tap, throws off power supply, and air-conditioning is carried out the overvoltage/undervoltage protection.
First autotransformer is used to adjust the supply power voltage to compressor and inside and outside blower fan.Second autotransformer is used for the supply power voltage that outer blower fan is given in further adjustment, to adjust the wind speed of outer blower fan.The first frequency scope is 45～55Hz.The second frequency scope is 55～65Hz.The return difference of voltage switching point all is 12V, and its function is the frequent switching when avoiding electrical network to fluctuate in a narrow margin.
A kind ofly can promote the device of air-conditioning to the accommodation of line voltage and frequency simultaneously, comprising: detection module comprises voltage detecting circuit and frequency detection circuit, detection of grid voltage and frequency; Control module is used to gather line voltage and the frequency signal sent here by detection module, the driving execution module; Executive Module, the buck tap that is used to switch first and second autotransformer, adjustment voltage makes it to satisfy the normal range of operation of compressor and blower fan.
Wherein, control module comprises control circuit, is used for voltage and frequency signal that the acquisition testing module transmits, sends control signal and gives Executive Module; Executive Module comprises switch driving circuit, the first switch element group, second switch unit group, the 3rd switch element group, first autotransformer and second autotransformer; Switch driving circuit receives said control signal and drives the buck tap that first, second and third switch element group is switched first and second autotransformer.Control circuit transmits control signal to drive circuit according to the line voltage and the frequency that collect; Drive circuit drives autotransformer according to control signal and switches tap; Control signal drives the first switch element group and switches the logic of the buck tap of said first autotransformer and be: under the power grid environment in the frequency range of 45～55Hz; When said voltage is higher than 242V (220V+10%), switch to first tap of its step-down 10%; When voltage during, switch to the second constant tap of sustaining voltage at 220V ± 10% scope; When voltage is lower than 198V (220V-10%), switch to 15% the 3rd tap of boosting; Under the power grid environment in the frequency range of 55～65Hz, when detected voltage is higher than 230V, switch to the second constant tap of sustaining voltage; When voltage during, switch to 15% the 3rd tap of boosting at 198V～230V; When voltage is lower than 198V, switch to 25% the 4th tap of boosting; When voltage surpasses 264V (+20%), do not switch in any tap, guarantee compressor disengagement power supply.Control circuit transmits control signal to drive circuit according to the line voltage and the frequency that collect; Drive circuit drives autotransformer according to control signal and switches tap; The logic that control signal driving second switch unit group is switched the buck tap of said second autotransformer is: when voltage is higher than 242V (220V+10%), switch to first tap of its step-down 10%; When voltage during, switch to the second constant tap of sustaining voltage at 220V ± 10% scope; When voltage is lower than 198V (220V-10%), switch to 15% the 3rd tap of boosting. When voltage surpasses 264V (+20%), do not switch in any tap, guarantee inside and outside blower fan disengagement power supply.Control circuit is according to detected outdoor environment temperature; Transmit control signal to said drive circuit; The buck tap that said the 3rd switch element group of said driving circuit drives is switched said second autotransformer changes outer blower fan supply power voltage, thereby makes the rotating speed respective change of outer blower fan.Control circuit comprises microcontroller, and said controller is a single-chip microcomputer.
In an embodiment shown in Figure 1; Can promote the device of air-conditioning simultaneously to the accommodation of line voltage and frequency; Comprise compressor 1, inner blower 2 and outer blower fan 4; Voltage detection circuit 10, supply frequency testing circuit 11, control circuit 5, first autotransformer 8, second autotransformer 9, switch driving circuit 6, first switch element 71, second switch unit 72; Wherein, Said voltage detection circuit 10, supply frequency testing circuit 11 are connected with the input of said control circuit 5, first autotransformer 8, and said control circuit 5 is connected with said switch driving circuit 6, and said switch driving circuit 6 is connected with said first switch element 71, second switch unit 72 respectively; Said compressor 1, inner blower 2, is connected with said first autotransformer 8 through said first switch element 71, regulation voltage is supplied power to compressor 1; Said outer blower fan 4 is connected with said second autotransformer 9 through said second switch unit 72, and said second autotransformer 9 is connected with said first autotransformer 8 through said first switch element 71; Said control circuit 5 is according to the detection signal of said voltage detection circuit 10 and supply frequency testing circuit 11; Driving 71 switchings of said first switch element through said switch driving circuit 6 is connected with the tap of said first autotransformer 8; Regulation voltage is given said compressor 1,2 power supplies of said inner blower, and supplies power for said outer blower fan 4 through said second autotransformer 9 and said second switch unit 72; Said control circuit 5 drives 72 switchings of said second switch unit according to detected ambient temperature and is connected with the tap of said second autotransformer 9, gives said outer blower fan 4 power supplies, to regulate outer blower fan rotating speed.
First switch element 71 comprises: first, second switches set, said compressor 1, inner blower 2 are connected with said first autotransformer 8 through said first, second switches set respectively.Second switch unit 72 is switches set.Wherein switches set is multiselect one switches set; And each switches set all is made up of several identical switches; Drive through switch switch driving circuit 6 by control circuit 5, guarantee that every group of switch has only a switch closure at most at synchronization, realize multiselect one function.Said control circuit 5 is single chip machine controlling circuits, can be according to detected voltage and frequency signal, and actuating logic is judged and controlled function, and then is realized the automatic Regulation function through the switching transformer tap.Switch can be an electric switch commonly used such as contactor, solid state relay, controllable silicon.
Control circuit 5 is according to detected supply frequency and voltage; Switch the first autotransformer tap through first switches set that drives first switch element; When making frequency and change in voltage; The supply power voltage of compressor also correspondingly changes, thereby makes compressor not only can adapt to the 50/60HZ electrical network automatically, and the voltage adaptation scope of broad is arranged.(the tap changing logic to the compressor power supply during 45～55HZ) electrical networks is 50HZ: when voltage is higher than 242V (220V+10%), switch to tap D, step-down 10%; When voltage during at 220V ± 10%, switch to tap C, voltage is constant; When voltage is lower than 198V (220V-10%), switch to tap B, boost 15%; Tap changing logic to the compressor power supply during 60HZ (greater than 55HZ and smaller or equal to 65HZ) electrical network is: when voltage is higher than 230V, switch to tap C, voltage is constant; When voltage during at 198V～230V, switch to tap B, boost 15%; When voltage is lower than 198V, switch to tap A, boost 25%.The return difference of above voltage switching point is 12V all, the frequent switching when avoiding electrical network to fluctuate in a narrow margin.When voltage surpasses 264V (+20%), do not switch in any tap, guarantee compressor disengagement power supply.
Control circuit 5 is according to detected supply voltage; Switch the first autotransformer tap through the second switch group that drives first switch element; When making change in voltage; The supply power voltage of inner blower and outer blower fan also correspondingly changes, thereby makes inner blower and outer blower fan that the voltage adaptation scope of broad arranged.The tap changing logic of fan power supply is: when voltage is higher than 242V (220V+10%), switch to tap D, step-down 10%; When voltage during at 220V ± 10%, switch to tap C, voltage is constant; When voltage is lower than 198V (220V-10%), switch to tap B, boost 15%.The return difference of above voltage switching point is 12V all, the frequent switching when avoiding electrical network to fluctuate in a narrow margin.When voltage surpasses 264V (+20%), do not switch in any tap, guarantee inner blower and outer blower fan disengagement power supply.
Control circuit 5 can also switch the second autotransformer tap through detected outdoor environment temperature, makes that when outdoor environment temperature changed, the supply power voltage of outer blower fan also correspondingly changed, thereby makes the rotating speed respective change of outer blower fan.
The present invention describes through a specific embodiment, it will be appreciated by those skilled in the art that, without departing from the present invention, can also carry out various conversion and be equal to alternative the present invention.In addition, to particular condition or concrete condition, can make various modifications to the present invention, and not depart from the scope of the present invention.Therefore, the present invention is not limited to disclosed specific embodiment, and should comprise the whole execution modes that fall in the claim scope of the present invention.
Claims (12)
1. a method that promotes air-conditioning to the accommodation of line voltage and frequency is characterized in that, may further comprise the steps:
A, detection of grid voltage and frequency;
B1, according to detected line voltage and frequency, adjust supply power voltage by certain logic to compressor;
B2, while are adjusted the supply power voltage to inside and outside blower fan according to detected line voltage by certain logic;
Said logic among the said step b1 is: when said voltage is higher than a predetermined ratio of fiducial value, the power supply of compressor input is switched to the step-down tap of first autotransformer, reduce the supply power voltage of compressor; When said voltage is lower than the said predetermined ratio of fiducial value, the power supply input of compressor is switched to the tap of boosting of first autotransformer, improve the supply power voltage of compressor; When in the said predetermined ratio scope of said voltage in fiducial value, the power supply input of compressor is switched to the constant tap of sustaining voltage of first autotransformer;
Said logic among the said step b2 is: when said voltage is higher than the said predetermined ratio of fiducial value, the power supply input of blower fan is switched to the step-down tap of second autotransformer, reduce the supply power voltage of blower fan; When said voltage is lower than the said predetermined ratio of fiducial value, the power supply input of blower fan is switched to the tap of boosting of second autotransformer, improve the supply power voltage of blower fan; When in the said predetermined ratio scope of said voltage in fiducial value, the power supply input of blower fan is switched to the constant tap of sustaining voltage of second autotransformer;
Said step b1 also comprises: judge that said frequency is in the first frequency scope or in the second frequency scope, when said frequency during in the first frequency scope, get into step c; Otherwise, get into steps d;
C, when said voltage is higher than 242V, the power supply of compressor input is switched to first tap of the step-down 10% of first autotransformer; When voltage during, switch to the second constant tap of sustaining voltage at 198V～242V scope; When voltage is lower than 198%, switch to 15% the 3rd tap of boosting;
D, when detected voltage is higher than 230V, the power supply of compressor input is switched to the second constant tap of sustaining voltage that said first autotransformer switches; When voltage during, switch to 15% the 3rd tap of boosting at 198V～230V; When voltage is lower than 198V, switch to 25% the 4th tap of boosting.
2. lifting air-conditioning according to claim 1 is to the method for the accommodation of line voltage and frequency; It is characterized in that; The said logic of said step b2 is specially: when said voltage is higher than 242V, the supply power voltage of inside and outside blower fan is switched to first tap of the step-down 10% of second autotransformer switching; When voltage during, switch to the second constant tap of sustaining voltage at 198V～242V scope; When voltage is lower than 198V, switch to 15% the 3rd tap of boosting.
3. lifting air-conditioning according to claim 1 and 2 is to the method for the accommodation of line voltage and frequency; It is characterized in that; In said step b1 and b2, also comprise: when voltage surpassed 264V or is lower than 176V, the power supply input of compressor and inside and outside blower fan did not switch in any tap; Throw off power supply, air-conditioning is carried out the overvoltage/undervoltage protection.
4. lifting air-conditioning according to claim 1 is characterized in that to the method for the accommodation of line voltage and frequency said first autotransformer is used to adjust the supply power voltage to compressor and inside and outside blower fan.
5. lifting air-conditioning according to claim 1 and 2 is characterized in that to the method for the accommodation of line voltage and frequency said second autotransformer is used for the supply power voltage that outer blower fan is given in further adjustment, to adjust the wind speed of outer blower fan.
6. lifting air-conditioning according to claim 1 is characterized in that to the method for the accommodation of line voltage and frequency said first frequency scope is 45～55Hz.
7. lifting air-conditioning according to claim 1 is characterized in that to the method for the accommodation of line voltage and frequency said second frequency scope is 55～65Hz.
8. lifting air-conditioning according to claim 1 and 2 is characterized in that to the method for the accommodation of line voltage and frequency the return difference of voltage switching point all is 12V, and its function is the frequent switching when avoiding electrical network to fluctuate in a narrow margin.
9. a device that promotes air-conditioning to the accommodation of line voltage and frequency is characterized in that, comprises
Detection module comprises voltage detecting circuit and frequency detection circuit, detection of grid voltage and frequency;
Control module is used to gather line voltage and the frequency signal sent here by detection module, the driving execution module;
Executive Module, the buck tap that is used to switch first and second autotransformer, adjustment voltage makes it to satisfy the normal range of operation of compressor and blower fan;
Control module comprises control circuit, is used for voltage and frequency signal that the acquisition testing module transmits, sends control signal and gives Executive Module;
Executive Module comprises switch driving circuit, the first switch element group, second switch unit group, the 3rd switch element group, first autotransformer and second autotransformer; Said switch driving circuit receives said control signal, drives the buck tap that first, second and third switch element group is switched first and second autotransformer;
Said control circuit transmits control signal to drive circuit according to the line voltage and the frequency that collect; Said drive circuit drives autotransformer according to control signal and switches tap, and said control signal drives the first switch element group and switches the logic of the buck tap of said first autotransformer and be:
Under the power grid environment in the frequency range of 45～55Hz, when said voltage is higher than 242V, switch to first tap of its step-down 10%; When voltage during, switch to the second constant tap of sustaining voltage at 198V～242V scope; When voltage is lower than 198V, switch to 15% the 3rd tap of boosting;
Under the power grid environment in the frequency range of 55～65Hz, when detected voltage is higher than 230V, switch to the second constant tap of sustaining voltage; When voltage during, switch to 15% the 3rd tap of boosting at 198V～230V; When voltage is lower than 198V, switch to 25% the 4th tap of boosting; When voltage surpasses 264V, do not switch in any tap, guarantee compressor disengagement power supply.
10. lifting air-conditioning according to claim 9 is to the device of the accommodation of line voltage and frequency; It is characterized in that; Said control circuit transmits control signal to drive circuit according to the line voltage and the frequency that collect; Said drive circuit drives autotransformer according to control signal and switches tap, and the logic that said control signal driving second switch unit group is switched the buck tap of said second autotransformer is:
When said voltage is higher than 242V, switch to first tap of its step-down 10%; When voltage during, switch to the second constant tap of sustaining voltage at 198V～242V scope; When voltage is lower than 198V, switch to 15% the 3rd tap of boosting; When voltage surpasses 264V, do not switch in any tap, guarantee inside and outside blower fan disengagement power supply.
11. lifting air-conditioning according to claim 10 is to the device of the accommodation of line voltage and frequency; It is characterized in that; Said control circuit transmits control signal to said drive circuit according to detected outdoor environment temperature, the buck tap that said the 3rd switch element group of said driving circuit drives is switched said second autotransformer; Outer blower fan supply power voltage is changed, thereby make the rotating speed respective change of outer blower fan.
12. according to the device of the arbitrary described lifting air-conditioning of claim 9 to 11 to the accommodation of line voltage and frequency, it is characterized in that said control circuit comprises microcontroller, said microcontroller is a single-chip microcomputer.
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| CN200710123651XA CN101162871B (en) | 2007-09-28 | 2007-09-28 | Method for prompting the accommodating range of air conditioner to electric network electric voltage and frequency, and device thereof |
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| CN102751919A (en) * | 2012-07-07 | 2012-10-24 | 浙江利欧股份有限公司 | Double-voltage automatic switchover switch and processing method |
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| CN105387569B (en) * | 2015-11-30 | 2019-03-05 | 珠海格力电器股份有限公司 | PV air-conditioner system control method and device |
| CN106385057A (en) * | 2016-09-19 | 2017-02-08 | 珠海格力电器股份有限公司 | Control device, control method, and electric appliance system |
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| CN112994031A (en) * | 2021-03-19 | 2021-06-18 | 国网安徽省电力有限公司电力科学研究院 | SVM static reactive load modeling method based on air conditioner load proportion |
| CN113294935B (en) * | 2021-05-27 | 2022-12-16 | 广东纽恩泰新能源科技发展有限公司 | Frequency adjusting method and device for heat pump frequency conversion unit |
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