CN105241006B - A kind of control method of convertible frequency air-conditioner, control device and convertible frequency air-conditioner - Google Patents

A kind of control method of convertible frequency air-conditioner, control device and convertible frequency air-conditioner Download PDF

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CN105241006B
CN105241006B CN201510639173.2A CN201510639173A CN105241006B CN 105241006 B CN105241006 B CN 105241006B CN 201510639173 A CN201510639173 A CN 201510639173A CN 105241006 B CN105241006 B CN 105241006B
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temperature difference
temperature
working frequency
controlling cycle
frequency
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CN105241006A (en
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王斌
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Hisense Shandong Air Conditioning Co Ltd
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Hisense Shandong Air Conditioning Co Ltd
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Abstract

Embodiments of the invention provide a kind of control method of convertible frequency air-conditioner, control device and convertible frequency air-conditioner, are related to field of air conditioning, it is possible to increase the degree of accuracy of frequency modulation control.Concrete scheme is：Obtain the 3rd temperature difference, the 3rd working frequency；Obtain second temperature difference, the second working frequency and the expected temperature difference；The expected temperature difference is the indoor temperature difference to be formed in the first controlling cycle；Coefficient of frequency modulation is obtained, the coefficient of frequency modulation is determined by second temperature difference, second working frequency, the 3rd temperature difference and the 3rd working frequency；According to the expected temperature difference, second temperature difference, second working frequency and the coefficient of frequency modulation, the first working frequency is determined；In the first controlling cycle, compressor operates according to first working frequency.The present invention is used for the manufacture of convertible frequency air-conditioner control device and convertible frequency air-conditioner.

Description

A kind of control method of convertible frequency air-conditioner, control device and convertible frequency air-conditioner
Technical field
The present invention relates to field of air conditioning, more particularly to a kind of control method of convertible frequency air-conditioner, control device and convertible frequency air-conditioner.
Background technology
Convertible frequency air-conditioner to indoor temperature during being controlled, by changing compressor operating frequency, thus it is possible to vary Regulating power of the air-conditioning to temperature.Generally, when room temperature and design temperature gap are larger, the working frequency of compressor is higher, with Room temperature is rapidly adjusted, in room temperature close to after design temperature, by the regulation to working frequency, room temperature is kept to reach steady Purpose.Working frequency is adjusted to optimal by certain control algolithm, it is possible to increase the comfort level of user, and reduce air-conditioning energy Consumption, improve Energy Efficiency Ratio.
The control algolithm of existing convertible frequency air-conditioner is mostly FUZZY ALGORITHMS FOR CONTROL.FUZZY ALGORITHMS FOR CONTROL is due to its mould to information , the shortcomings that frequency modulation control degree of accuracy is low be present in paste processing.For example, FUZZY ALGORITHMS FOR CONTROL is become with indoor environment parameter or its change Gesture carries out frequency modulation control as feedback parameter, and reaction is slow, is delayed long because regulation process of the air-conditioning to room temperature has in itself Feature so that often governing response is slow for the frequency modulation control of FUZZY ALGORITHMS FOR CONTROL, and overshoot easily occurs, thus frequency modulation control is accurate Spend low, influence the comfort level of user.
The content of the invention
Embodiments of the invention provide a kind of control method of convertible frequency air-conditioner, control device and convertible frequency air-conditioner, it is possible to increase The frequency modulation control degree of accuracy, so as to improve the comfort level of user.
To reach above-mentioned purpose, embodiments of the invention adopt the following technical scheme that：
In a first aspect, a kind of control method of convertible frequency air-conditioner, including：
Obtain the 3rd temperature difference, the 3rd working frequency；Wherein, the 3rd temperature difference is the interior formed in the 3rd controlling cycle The temperature difference, the 3rd working frequency are working frequency of the compressor in the 3rd controlling cycle；Obtain second temperature difference, the second work Frequency and the expected temperature difference；Wherein, second temperature difference is the indoor temperature difference formed in the second controlling cycle, second work Frequency is working frequency of the compressor in second controlling cycle, and the expected temperature difference is is wanted in the first controlling cycle The indoor temperature difference of formation, second controlling cycle are after the 3rd controlling cycle and positioned at described the on timeline Controlling cycle before one controlling cycle；Coefficient of frequency modulation is obtained, the coefficient of frequency modulation is by second temperature difference, second work Frequency, the 3rd temperature difference and the 3rd working frequency determine；
According to the expected temperature difference, second temperature difference, second working frequency and the coefficient of frequency modulation, is determined One working frequency；
In the first controlling cycle, compressor operates according to first working frequency.
Second aspect, a kind of control device of convertible frequency air-conditioner, including：
Control unit, described control unit include acquisition module and setting module；The acquisition module, for obtaining the 3rd The temperature difference, the 3rd working frequency；Wherein, the 3rd temperature difference be the 3rd controlling cycle in formed the indoor temperature difference, the 3rd work Working frequency is working frequency of the compressor in the 3rd controlling cycle；The acquisition module, it is additionally operable to obtain second temperature difference and the Two working frequencies；Wherein, second temperature difference is the indoor temperature difference formed in the second controlling cycle, and second working frequency is Working frequency of the compressor in second controlling cycle；Second controlling cycle is positioned at the described 3rd control on timeline Controlling cycle after cycle processed；The setting module, for obtaining the expected temperature difference；The expected temperature difference is in the first control week The indoor temperature difference to be formed in phase, first controlling cycle are to be located at the control after second controlling cycle on timeline Cycle processed；The setting module, it is additionally operable to obtain coefficient of frequency modulation, the coefficient of frequency modulation is by the setting module according to described second The temperature difference, second working frequency, the 3rd temperature difference and the 3rd working frequency determine；
Arithmetic element, for according to the expected temperature difference, second temperature difference, second working frequency and the tune Frequency coefficient, determine the first working frequency；
Adjustment unit, for being operated in the first controlling cycle, control compressor according to first working frequency.
The third aspect, a kind of convertible frequency air-conditioner, including the control device that second aspect is provided.
Control method, control device and the convertible frequency air-conditioner for the convertible frequency air-conditioner that embodiments of the invention are provided, by obtaining The expected temperature difference, second temperature difference, the second working frequency and coefficient of frequency modulation are taken, is calculated according to above parameter by default control function The first working frequency is obtained, and working frequency is adjusted to the first working frequency when the first controlling cycle starts.By the present invention The control method for the first controlling cycle that provides of embodiment, cycle applications pass through the pre- of renewal in multiple controlling cycles The phase temperature difference and coefficient of frequency modulation, the working frequency updated, complete the regulation process to room temperature.For different controlling cycles, By being adjusted so that indoor temperature smooth variation to the expected temperature difference, while by the renewal of coefficient of frequency modulation, it is reflected in difference In the case of indoor load, the change of the indoor temperature caused by the change of working frequency, so as to improve the standard of frequency modulation control Exactness.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, embodiment will be described below In the required accompanying drawing used be briefly described, it should be apparent that, drawings in the following description be only the present invention some Embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, can also be attached according to these Figure obtains other accompanying drawings.
A kind of control method for convertible frequency air-conditioner that Fig. 1 is provided by embodiments of the invention one；
A kind of control method for convertible frequency air-conditioner that Fig. 2 is provided by embodiments of the invention two；
Fig. 3 is the schematic diagram that indoor temperature changes over time in embodiments of the invention two；
Fig. 4 is the schematic diagram that indoor temperature changes over time when ping-pang storage is introduced in embodiments of the invention two；
A kind of structural representation of the control device for convertible frequency air-conditioner that Fig. 5 is provided by embodiments of the invention three.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made Embodiment, belong to the scope of protection of the invention.
For the ease of clearly describing the technical scheme of the embodiment of the present invention, in an embodiment of the present invention, employ " the One ", the printed words such as " second " make a distinction to function and the essentially identical identical entry of effect or similar item, and those skilled in the art can To understand that the printed words such as " first ", " second " are not to be defined to quantity and execution order.
Embodiments of the invention provide a kind of control method of convertible frequency air-conditioner, the work for the compressor to convertible frequency air-conditioner Frequency is controlled.Unless otherwise noted, working frequency signified in embodiments of the invention, the compressor of convertible frequency air-conditioner is referred both to Working frequency.
Regulation process of the convertible frequency air-conditioner to room temperature includes several controlling cycles, in an embodiment of the present invention, each control Cycle processed corresponds to a working frequency, and the working frequency in the first controlling cycle is the first working frequency, by that analogy.Separately It is outer it should be noted that the indoor temperature difference in a controlling cycle, refers to the indoor temperature at the end of the controlling cycle, subtracts this The difference obtained by indoor temperature when controlling cycle starts.
Embodiment one
Embodiments of the invention one provide a kind of control method of convertible frequency air-conditioner, shown in reference picture 1, comprise the following steps：
101st, control device obtains the 3rd temperature difference, the 3rd working frequency.
Regulation process of the convertible frequency air-conditioner to room temperature includes several controlling cycles, first before the first controlling cycle starts The first working frequency, i.e. working frequency in the first controlling cycle are first determined, then when the first controlling cycle starts, by work Frequency is adjusted to the first working frequency.Preferably, at the end of the adjacent previous controlling cycle of the first controlling cycle, first is determined Working frequency.
It is determined that, it is necessary to obtain the relevant parameter that calculates the first working frequency during the first working frequency, including the 3rd temperature difference With the 3rd working frequency, wherein, the 3rd temperature difference is the indoor temperature difference formed in the 3rd controlling cycle, i.e. the 3rd controlling cycle terminates When indoor temperature, subtract the difference obtained by indoor temperature when the 3rd controlling cycle starts.3rd working frequency is compressor Working frequency in the 3rd controlling cycle.
3rd controlling cycle is to be located at the controlling cycle before the first controlling cycle, the 3rd controlling cycle and the on timeline A controlling cycle is at least spaced between one controlling cycle.
102nd, the second working frequency, second temperature difference and the expected temperature difference are obtained.
It is determined that, it is necessary to obtain the relevant parameter that calculates the first working frequency during the first working frequency, except being obtained in step 101 Outside the 3rd temperature difference taken and the 3rd working frequency, in addition to the expected temperature difference, second temperature difference and the second working frequency, below These three parameters are illustrated one by one.
The first, the second temperature difference.
Second temperature difference is the indoor temperature difference formed in the second controlling cycle, and the second controlling cycle is to be located at the 3rd on timeline Controlling cycle after controlling cycle and before the first controlling cycle.The indoor temperature difference formed in second controlling cycle, it is Refer to the indoor temperature at the end of the second controlling cycle, subtract the difference obtained by indoor temperature when the second controlling cycle starts.
The second, the second working frequency.
Second working frequency is working frequency of the compressor in the second controlling cycle.
3rd, it is contemplated that the temperature difference.
It is expected that the temperature difference is the indoor temperature difference to be formed in the first controlling cycle.Specifically, according to the second controlling cycle The value of interior parameter preset, search expected temperature difference table and obtain the expected temperature difference, it is contemplated that temperature difference table is used for the value for indicating parameter preset With the mapping relations between expected temperature difference value, wherein parameter preset is the ratio of the second working frequency and second temperature difference.
Table one
The ratio of second working frequency and second temperature difference has reacted the size of room load, and the value is bigger, shows that room temperature becomes The running frequency of compressor is bigger corresponding to 1 degree Celsius of change, i.e., indoor load is bigger, conversely, then showing that indoor load is smaller.Room Internal loading is bigger, and indoor temperature change generated in case is slower, pair it is contemplated that temperature difference value it is smaller.Indoor load is smaller, and indoor temperature change generated in case is got over Hurry up, pair it is contemplated that temperature difference value it is bigger.
103rd, coefficient of frequency modulation is obtained.
Coefficient of frequency modulation is used to reflect, under certain indoor load, when working frequency changes, for a control week Indoor Temperature difference band in phase carrys out much influences.Coefficient of frequency modulation is by second temperature difference, the second working frequency, the 3rd temperature difference and the 3rd work Working frequency determines.
The indoor temperature difference in one controlling cycle, reflect the size of indoor load in the controlling cycle.Convertible frequency air-conditioner pair The regulation process of room temperature includes multiple controlling cycles, and during whole temperature adjustment, the size of indoor load may change.But Adjacent or close it is considered that in approximate two controlling cycles of transient state, indoor load size keeps constant or near Seemingly.Simultaneously as working frequency keeps constant in a controlling cycle, therefore when actually calculating, with the first controlling cycle Before adjacent or near to two controlling cycles each in respective chamber/chambers the temperature difference difference, and working frequency in the two controlling cycles Difference ratio, as coefficient of frequency modulation, the unit change amount of instruction compressor operating frequency is drawn in a controlling cycle The change of the indoor temperature difference risen.Wherein, the unit change amount of working frequency can refer to 1 hertz, then coefficient of frequency modulation refers to working frequency 1 hertz of change when, the change of the caused indoor temperature difference in a controlling cycle.
Embodiments of the invention according to before the first controlling cycle adjacent or near to two controlling cycles in Indoor Temperature Difference and working frequency coefficient of frequency modulation is calculated, wherein the first controlling cycle before adjacent or near to two controlling cycles it is specific For the second controlling cycle and the 3rd controlling cycle.According to second temperature difference, the second working frequency, the 3rd temperature difference and the 3rd work frequency Rate determines coefficient of frequency modulation.Optionally, second temperature difference, the second working frequency, the 3rd temperature difference and the 3rd working frequency are substituted into the One formula, is calculated coefficient of frequency modulation.First formula is specially：ξ=(△ T2—△T3)/(F2—F3).Wherein, ξ is frequency modulation system Number, △ T2For second temperature difference, F2For the second working frequency, △ T3For the 3rd temperature difference, the i.e. indoor temperature difference in the 3rd controlling cycle, F3For the 3rd working frequency, i.e. working frequency in the 3rd controlling cycle.It should be noted that the 3rd controlling cycle is timeline The upper controlling cycle being located at before the first controlling cycle, and the 3rd controlling cycle is adjacent or close with the second controlling cycle Controlling cycle.F2—F3Change total amount for the second controlling cycle relative to the working frequency of the 3rd controlling cycle.△T2—△T3 Change total amount for the second controlling cycle relative to the indoor temperature difference of the 3rd controlling cycle, i.e. the change total amount due to working frequency Caused total indoor temperature difference.△T2—△T3With F2—F3Ratio be to reflect the unit change amount of working frequency the The influence come in two controlling cycles to Indoor Temperature difference band.
104th, according to the expected temperature difference, second temperature difference, the second working frequency and coefficient of frequency modulation, the first working frequency is determined.
Embodiments of the invention determine coefficient of frequency modulation using approximate two controlling cycles of transient state, to indicate compressor operating The unit change amount of frequency in a controlling cycle on caused by the indoor temperature difference influence, further, according to coefficient of frequency modulation Calculate in order to form the expected temperature difference in the first controlling cycle, it is necessary to working frequency variable quantity, and finally with the variable quantity With the second working frequency and as the first working frequency value, i.e. default control function is the first working frequency on expection The temperature difference, second temperature difference, the function of the second working frequency and coefficient of frequency modulation.Optionally, the present embodiment provides a kind of default control The concrete form of function：F1=F2+(△T1—△T2)/ξ.Wherein, F1For the first working frequency, △ T1For the expected temperature difference.
(△T1—△T2)/ξ, i.e. expected difference between the temperature difference and second temperature difference, and the ratio of coefficient of frequency modulation, the ratio Represent, be (△ T to form size1—△T2) the indoor temperature difference, the working frequency introduced is needed on the basis of the second working frequency Variable quantity.That is, the first working frequency can be worth on the basis of the second working frequency plus a frequency amendment, and the frequency is repaiied On the occasion of size be (△ T1—△T2)/ξ。
Certainly, those familiar with the art, other default control functions are obtained according to above parameter, or it is right The default control function that embodiments of the invention provide is deformed or substituted the specific of resulting new default control function Form, it should all be included within the scope of the present invention.
105th, operated in the first controlling cycle, compressor according to first working frequency.
Optionally, at the end of the adjacent previous controlling cycle of the first controlling cycle, frequency modulation corresponding to current time is calculated Coefficient, and the first working frequency is further determined that, working frequency is then adjusted to the first work when the first controlling cycle starts Working frequency.
Regulation process of the convertible frequency air-conditioner to room temperature includes several controlling cycles, and the first controlling cycle can be therein One controlling cycle.In other words, the control method for the convertible frequency air-conditioner that the present embodiment is provided, can be with cycle applications in multiple control weeks Phase.For different controlling cycles, new working frequency can be obtained by updating the expected temperature difference and coefficient of frequency modulation.
The control method for the convertible frequency air-conditioner that the present embodiment is provided, by obtaining the expected temperature difference, second temperature difference, the second work Frequency and coefficient of frequency modulation, the first working frequency is calculated by default control function according to above parameter, and in the first control Working frequency is adjusted to the first working frequency when cycle processed starts.Embodiments of the invention are provided all for the first control The control method of phase, cycle applications are in multiple controlling cycles, by the expection temperature difference and coefficient of frequency modulation of renewal, the work updated Working frequency, complete the regulation process to room temperature.For different controlling cycles, by being adjusted so that interior to the expected temperature difference Temperature smooth variation, while pass through the renewal of coefficient of frequency modulation, in the case of being reflected in different indoor loads, the change of working frequency The change of caused indoor temperature, so as to improve the degree of accuracy of frequency modulation control.
Embodiment two
Based on embodiment one, the embodiment of the present invention two provides a kind of control method of convertible frequency air-conditioner, shown in reference picture 2, bag Include following steps：
201st, control device obtains the 3rd temperature difference and the 3rd working frequency.
202nd, the expected temperature difference, second temperature difference and the second working frequency are obtained.
In a controlling cycle, in the case that working frequency is certain, indoor load is bigger, and indoor temperature change generated in case is slower, I.e. the average rate of change of indoor temperature is smaller in the controlling cycle.Therefore, in a controlling cycle, due to indoor load and room Linear relationship between the average rate of change of interior temperature, the controlling cycle can be reflected by the average rate of change of indoor temperature The size of interior indoor load.Further, the average rate of change of indoor temperature is smaller, i.e., in the certain situation of air conditioner refrigerating ability Under, the change of indoor temperature is slower, it is therefore contemplated that the specific value of the temperature difference is also smaller.
Optionally, the average rate of change of indoor temperature in the second controlling cycle is determined, and is determined in advance according to the average rate of change The phase temperature difference.Wherein, the second controlling cycle is to be located at the controlling cycle before the first controlling cycle on timeline.
Specifically, pass through preset function △ T1=± | S*P1*(△T2/P2) | the expected temperature difference is calculated.Wherein, △ T1For It is expected that the temperature difference, P1For the time span of the first controlling cycle, P2For the time span of the second controlling cycle, △ T2/P2As second The average rate of change of indoor temperature in controlling cycle, S is default slope value, and S is not equal to 0.
Optionally, can also be according to the second control in the equal application scenarios of the time span of different controlling cycles The variable quantity of indoor temperature determines the expected temperature difference in cycle.Preset function for calculating the expected temperature difference is specifically as follows：△T1 =± | S* △ T2|。
△T1It can take on the occasion of can also take negative value, determine △ T1The principle of symbol is specially：When the second controlling cycle knot If indoor temperature is less than design temperature, △ T during beam1Take on the occasion of, represent the first controlling cycle in need raise indoor temperature.When If indoor temperature is higher than design temperature, △ T at the end of second controlling cycle1Negative value is taken, represents to need in the first controlling cycle Reduce indoor temperature.
It should be noted that determine △ T1The principle of symbol is unrelated with the mode of operation of air-conditioning, and either heating mode is also It is refrigeration mode, the principle is applicable.For example, in a heating mode, when indoor temperature is less than design temperature, △ T1Take on the occasion of, Then indoor temperature is raised in the first controlling cycle.Because air-conditioner continuous heats, indoor temperature could possibly be higher than design temperature, now △T1Negative value is taken, then reduces indoor temperature in the first controlling cycle.Equally, in cooling mode, indoor temperature is higher than setting During temperature, △ T1Negative value is taken, then indoor temperature is reduced in the first controlling cycle, when indoor temperature is less than design temperature, △ T1Take On the occasion of then raising indoor temperature in the first controlling cycle.
Further, it is contemplated that right by being adjusted rise to working frequency or reducing indoor temperature after the temperature difference determines How the specific of working frequency is adjusted, and the present embodiment will illustrate in subsequent step for the first working frequency.
203rd, coefficient of frequency modulation is obtained.
Coefficient of frequency modulation is used for the room for indicating that the unit change amount of compressor operating frequency is caused in a controlling cycle The interior temperature difference, specifically, the unit change amount of working frequency can refer to 1 hertz, then coefficient of frequency modulation refers to 1 hertz of the change of working frequency When, the caused indoor temperature difference in a controlling cycle.
Specifically, obtain the 3rd temperature difference and the 3rd working frequency.Wherein, the 3rd temperature difference is the interior in the 3rd controlling cycle The temperature difference, the 3rd working frequency are that working frequency threeth controlling cycle of the compressor in the 3rd controlling cycle is to be located on timeline Controlling cycle before first controlling cycle, and be different controlling cycles from the second controlling cycle.
Second temperature difference, the second working frequency, the 3rd temperature difference and the 3rd working frequency are substituted into the first formula, determine frequency modulation Coefficient.First formula is specially：ξ=(△ T2—△T3)/(F2—F3).Wherein, △ T3For the 3rd temperature difference, F3For the 3rd work Frequency.
For the first controlling cycle, when calculating coefficient of frequency modulation, different controlling cycles is selected as the second controlling cycle With the 3rd controlling cycle, different values can be calculated.Preferably, with the adjacent previous controlling cycle of the first controlling cycle For the second controlling cycle, using the adjacent previous controlling cycle of the second controlling cycle as the 3rd controlling cycle, so as to more accurately The variable quantity and the relation of the indoor temperature difference of working frequency when the control of reflection first starts.
For different controlling cycles, the coefficient of frequency modulation difference value that can be calculated, i.e. the specific value of coefficient of frequency modulation can To be real-time change.Preferably, before each controlling cycle starts, calculated, updated for the controlling cycle Coefficient of frequency modulation, and subsequently calculated according to the coefficient of frequency modulation of renewal.
204th, the temperature difference, second temperature difference, the second working frequency and coefficient of frequency modulation will be expected, default control function is substituted into and calculates Obtain the first working frequency.
Default control function is the first working frequency on the expected temperature difference, second temperature difference, the second working frequency and frequency modulation The function of coefficient.Optionally, the present embodiment provides a kind of concrete form of default control function：F1=F2+k(△T1—△T2)/ ξ.Wherein, F1For the first working frequency, k is correction coefficient and k ≠ 0.Certainly, those familiar with the art, according to The concrete form of above parameter default control function new obtained by default control function is deformed or substituted, should all contain Cover within protection scope of the present invention.
The schematic diagram that indoor temperature with reference to shown in Fig. 3 changes over time, to determining the first work according to default control function The process of working frequency illustrates.Especially, Fig. 3 show the change procedure of indoor temperature in a heating mode, certainly this simultaneously The control method for not representing the convertible frequency air-conditioner that embodiments of the invention are provided is only applicable to heating mode, and the present invention is for frequency conversion The mode of operation of air-conditioning does not limit.
In Fig. 3, transverse axis is time shaft, and the time point on transverse axis uses ta、tb、tcEtc. being identified, wherein, taFor 0 time Time point when point, i.e. air-conditioning are started shooting.Time span between two neighboring time point is a controlling cycle, difference control week The time span of phase can be with identical or different, and Fig. 3 show different controlling cycle time span identical situations.Indulged in Fig. 3 Axle is temperature axis, W0For design temperature.
In illustrating below, for ease of description, to taTo tbBetween controlling cycle PbaRepresent, PbaInterior working frequency is used FbaRepresent, by that analogy.Use Wa、WbT is represented respectivelyaTime point and tbTime point each self-corresponding indoor temperature, by that analogy.
In PbaIt is interior, FbaInitial operating frequency when being started shooting for air-conditioning.
With PcbFor the first controlling cycle when, with PbaFor the second controlling cycle, in tbTime point is calculated：It is expected that temperature difference △ T1=± | S*P1*(△T2/P2) |, coefficient of frequency modulation ξ=(△ T2—△T3)/(F2-F3), wherein, △ T3And F3For 0.Then, lead to Cross default control function F1=F2+k(△T1—△T2The first working frequency is calculated in)/ξ.
It should be noted that for purposes of illustration only, △ T are calculated in the present embodiment respectively1And ξ, and be further calculated F1.In the frequency adjustment procedure of reality, it can not have to calculate △ T respectively1And ξ, F is then calculated1, but pass through by Whole parameters substitute into final formula and F are calculated1, caused rounding error when calculating intermediate result to reduce.
With PdcFor the first controlling cycle when, with PcbFor the second controlling cycle, with PbaFor the 3rd controlling cycle, in tcTime Point is calculated, by that analogy.
It should be noted that in tb、tcAnd tdAt time point, because indoor temperature is less than design temperature, therefore calculating F1 When △ T1Take on the occasion of.And in teAt time point, because indoor temperature exceedes design temperature, therefore calculating F1When △ T1Take negative value. In follow-up controlling cycle, continue to determine △ T according to the magnitude relationship between indoor temperature and design temperature1Symbol.
When indoor temperature gradually close to design temperature when, indoor temperature is fluctuated above and below design temperature and gradually stablized and setting Constant temperature degree.
Preferably, for default control function F1=F2+k(△T1—△T2The value of correction coefficient k, k in)/ξ can be with According to | △ T2| size be adjusted, as | △ T2| during more than or equal to the second predetermined threshold value, k value is more than or equal to 1, when | △ T2| during less than the second predetermined threshold value, k value is less than 1.Wherein, the value of the second predetermined threshold value, is specifically as follows TEMP The accuracy value of device, or the multiple of the accuracy value.Wherein temperature sensor is the sensor for measuring indoor temperature.
Specifically, with reference to shown in table 2, in a kind of specific application scenarios, the second predetermined threshold value is 0.3 degree Celsius.No Time span with controlling cycle can be different, and table two show the situation that controlling cycle is A minutes, and different controlling cycles are led to Spending the time makes a distinction, wherein 0 time point was the time point that air-conditioning receives temperature adjustment instruction.
Within M that air-conditioning has just been started shooting (being specially 3 in table 2) the individual continuous control cycle, due to now design temperature and reality The temperature difference of indoor temperature is maximum, so the variable quantity of indoor temperature is bigger in each controlling cycle in this M controlling cycle. Now, F is calculated using any controlling cycle in this M controlling cycle as the second controlling cycle1When, k value is more than 1. In subsequent N (being specially 4 in table 2) individual continuous controlling cycle, k is equal to 1.After M+N controlling cycle, indoor temperature is gradually Gradually close to design temperature, △ T2Gradually reduce, now calculate the F of gained1Also gradually close to F2.Therefore △ T are worked as2Less than or equal to During two predetermined threshold values, k value is less than 1.So that when temperature is close to design temperature indoors, by adjusting k value to F1And F2 Difference portion (k (△ T1—△T2)/ξ) size be finely adjusted, to improve to the control accuracy of working frequency so that room The change of interior temperature is gentler.
205th, when benchmark room temperature is within the first room temperature section, the expected temperature difference is determined according to ping-pang storage algorithm.
When indoor temperature gradually close to design temperature when, indoor temperature is fluctuated above and below design temperature and gradually stablized and setting Constant temperature degree.When temperature is close to design temperature indoors, to cause indoor temperature smooth variation, the control improved to working frequency is accurate Exactness, the present embodiment determines the expected temperature difference according to ping-pang storage algorithm, and the first working frequency is further calculated.Wherein table tennis Pang control algolithm refers to, when indoor temperature is close to design temperature, reduces the adjustment amplitude to working frequency to cause Indoor Temperature Spend the control algolithm of smooth change, i.e., the control algolithm being finely adjusted to indoor temperature.
It should be noted that fine setting referred herein, including readjustment when indoor temperature exceedes design temperature.Indoor temperature Refer to more than design temperature, indoor temperature is higher than design temperature in a heating mode, and indoor temperature is less than and set in cooling mode Constant temperature degree.When indoor temperature exceedes design temperature, the first working frequency for being calculated by ping-pang storage algorithm may Less than the second working frequency, so as to play a part of adjusting back room temperature.
First room temperature section is used to determine when to trigger ping-pang storage algorithm.Specifically, indoor temperature first enters into first After room temperature section, that is, start to use ping-pang storage algorithm.Optionally, the first room temperature section is using design temperature as median Length is the closed interval of the first predetermined threshold value.First predetermined threshold value is represented with 2Ea, indoor temperature, which belongs to the first room temperature section, is Refer to, indoor temperature is more than or equal to W0- Ea and it is less than or equal to W0+Ea.Wherein W0For design temperature.
The schematic diagram that indoor temperature with reference to shown in Fig. 4 changes over time, below by way of step 2051- steps 2052 to root The detailed process for determining the expected temperature difference according to ping-pang storage algorithm illustrates.In Fig. 4, transverse axis is time shaft, and the longitudinal axis is temperature axis, The minimum value in the first room temperature section is W on the longitudinal axis0- Ea, the maximum in the first room temperature section is W0+Ea。
2051st, benchmark room temperature is obtained.
Wherein, benchmark room temperature is the indoor temperature at the end of the adjacent previous controlling cycle of the first controlling cycle.If benchmark Room temperature then performs step 2052, if it is not, then skipping whole step 205 within the first room temperature section.
With reference to Fig. 4, with PedFor the first controlling cycle when, PedAdjacent previous controlling cycle be Pdc, benchmark room temperature is PdcKnot Indoor temperature during beam, i.e. tdThe indoor temperature W at time pointd.Due to W0-Ea≤Wd≤W0+ Ea, then perform step 2052.
2052nd, the difference of benchmark room temperature is subtracted as the expected temperature difference using target temperature.
Wherein, target temperature belongs to the first room temperature section.
When benchmark room temperature is not up to design temperature, target temperature is equal to design temperature, when benchmark room temperature exceedes setting temperature When spending, target temperature is set to the value of not up to design temperature.
Not up to design temperature refers to, indoor temperature is less than design temperature in a heating mode, or in cooling mode Indoor temperature is higher than design temperature.
Refer to more than design temperature, indoor temperature is higher than design temperature, or room in cooling mode in a heating mode Interior temperature is less than design temperature.
With W1Represent target temperature, W2Benchmark room temperature is represented, then is expected temperature difference △ T1=W1-W2。
In cooling mode, when benchmark room temperature is more than design temperature, target temperature is equal to design temperature, when benchmark room temperature During less than design temperature, target temperature is more than design temperature.
Work as W2Less than W0+ Ea and it is more than W0When, indoor temperature is higher than setting value, now by W1Value be set to W0, there is W1＜ W2, △ T1It is negative, represents to reduce indoor temperature in the first controlling cycle, so that indoor temperature is close to design temperature.
Work as W2Less than W0And it is more than W0During-Ea, indoor temperature is less than setting value, now by W1Value be set to be more than W0It is and small In W0+ Ea value, there is W1＞ W2, △ T1Just, to represent to raise indoor temperature in the first controlling cycle, so that indoor temperature connects Nearly design temperature.
In a heating mode, when benchmark room temperature is less than design temperature, target temperature is equal to design temperature, when benchmark room temperature During more than design temperature, target temperature is less than design temperature.
Work as W2More than W0- Ea and it is less than W0When, indoor temperature is less than setting value, now by W1Value be set to W0, there is W1＞ W2, △ T1Just, to represent to raise indoor temperature in the first controlling cycle, so that indoor temperature is close to design temperature.
Work as W2More than W0And it is less than W0During+Ea, indoor temperature is higher than setting value, now by W1Value be set to be less than W0It is and big In W0- Ea value, there is W1＜ W2, △ T1It is negative, represents to reduce indoor temperature in the first controlling cycle, so that indoor temperature connects Nearly design temperature.
Refrigeration mode and the difference under heating mode during sets target temperature are explained above, is determined according to target temperature It is expected that after the temperature difference, further determine that the calculating process of the first working frequency is identical, below in conjunction with Fig. 4, under heating mode Determine that the process of working frequency is described further, determine that the process of working frequency repeats no more under refrigeration mode.
In tdTime point, W2=Wd, more than W0- Ea and it is less than W0, corresponding W1Value is W0, then △ T1=W0-Wd.Enter one Step ground, it is determined that △ T1Afterwards, according to default control function F1=F2+k(△T1—△T2F is calculated in)/ξ1.Wherein, ξ meter Calculation process with indoor temperature not in the first room temperature section when calculating process it is identical, here is omitted.
With reference to Fig. 4, in teTime point, W2=We, more than W0And it is less than W0+ Ea, corresponding W1More than W0- Ea and it is less than W0.Example Such as, target temperature is specially W0- Ea/2, then △ T1=(W0-Ea/2)-We.Optionally, it is more than W in target temperature0- Ea and it is less than W0Under conditions of, when benchmark room temperature is closer to design temperature, target temperature is also closer to design temperature, now △ T1Absolute value Also gradually close to 0 value, F1With F2Between difference gradually close to 0 value, change of the indoor temperature in a controlling cycle also will gradually Gradually nearly 0 value, and gradually stablize in design temperature.
Due to F1With F2Between difference gradually close to 0 value, it may be necessary to after more than one controlling cycle, Indoor Temperature Degree could from less than design temperature gradually to more than design temperature, or from more than design temperature gradually to less than design temperature.
Optionally, with reference to table two, when indoor temperature is close to design temperature, to exempt from the indoor temperature in the first controlling cycle Vary widely, cause indoor temperature and the difference of design temperature to become big on the contrary, preset when second temperature difference is less than or equal to second During threshold value, to default control function F1=F2+k(△T1—△T2Correction coefficient k in)/ξ is adjusted so that and k is less than 1, from And improve the frequency modulation degree of accuracy so that the change of indoor temperature is gentler.
Or as △ T in continuous two controlling cycles1Not during reversion, correction coefficient k value is adjusted to be less than 1, Again by improving the frequency modulation degree of accuracy to cause the change of indoor temperature gentler.With reference to Fig. 4, in tfAnd tgTime point △ T1 Respectively less than 0, if tgTime point k value is more than or equal to 1, easily causes in PgfInterior indoor temperature change generated in case is excessive, therefore In tgThe value that time point reduces k can cause PgfThe change of interior indoor temperature is gentler.
With reference to the description in step 2051 and step 2052 to ping-pang storage algorithm, further illustrate herein. The change procedure of indoor temperature under heating mode with reference to shown in Fig. 4, in tonTime point indoor temperature reaches design temperature, ton Time point is in PdcIn cycle.In tonBefore time point, indoor temperature is less than design temperature, therefore in tonControl before time point In cycle processed (including Pdc), without triggering ping-pang storage algorithm.PdcEach controlling cycle afterwards, passes through ping-pang storage algorithm Calculate the working frequency of compressor.
From PdcFirst controlling cycle afterwards, i.e. PdeCycle, setting △ T1=△ T2So that F1=F2+k(△ T1—△T2)/ξ=F2, that is, maintain working frequency constant, until indoor temperature exceedes design temperature W0, such as t in Fig. 4eTime point institute Show.
(it is P in Fig. 4 calculating next controlling cyclefe) working frequency when, target temperature is set to W0- Ea, and high-ranking officers Positive coefficient k value is set to 1, and the working frequency for now calculating next controlling cycle of gained is less than an adjacent upper controlling cycle Working frequency, i.e. working frequency reduce.
If PfeIndoor temperature does not decline in cycle, then is calculating PfeNext cycle in cycle (is P in Fig. 4gfCycle) Working frequency when, correction coefficient k value is set to 0.9, or further reduce k value, until indoor temperature starts Reduce.
After room temperature starts reduction, maintain working frequency constant, until indoor temperature is reduced to design temperature W0(figure below It is P in 4igIn cycle), target temperature is now set to W0+ Ea/2, now calculate the working frequency of next controlling cycle of gained More than the working frequency of an adjacent upper controlling cycle, i.e. working frequency raises.
(it is P in Fig. 4 calculating next controlling cyclejiCycle) in working frequency when, if indoor temperature is in (W0- Ea, W0) (t as shown in Figure 4 in sectioniTime point), then correction coefficient k value is set to 0.8；If indoor temperature is to be reduced to W0Below-Ea, then correction coefficient k value is set to 0.7, to reduce the amplitude of accommodation of working frequency.
If PjiIndoor temperature does not rise in cycle, then can increase correction coefficient k value, until in indoor temperature Rise.Preferably, the regulation step-length (＜ 0.1) to correction coefficient k can be reduced, to improve degree of regulation.If PjiCycle interior room Interior temperature is begun to ramp up, then maintains working frequency constant, until indoor temperature is increased again to design temperature W0More than.
With reference to Fig. 4, teIndoor temperature exceedes design temperature W for the first time during time point0, in teFirst after time point Controlling cycle, target temperature are set to W0-Ea.When indoor temperature is again above design temperature W0When, target temperature is set to be less than W0 Compare W simultaneously0- Ea is closer to W0Value, such as W0- Ea/2, while the further value of correction for reduction coefficient k.
Controlling cycle below is more arrived, target temperature is closer to design temperature W0, while correction coefficient k value also more connects 0 is bordering on, then calculates the difference of working frequency in the two neighboring controlling cycle of gained closer to 0, the i.e. tune to working frequency Section amplitude is less and less.Meanwhile indoor temperature is closer to design temperature W0, and shock range is closer to 0.Final indoor temperature Reach stable state with working frequency, only working frequency is finely adjusted according to the variation of indoor temperature when needed.
206th, operated in the first controlling cycle, compressor according to first working frequency.
207th, indoor set wind speed is adjusted.
While execution step 206 is adjusted to working frequency, indoor set wind speed is entered according to the first working frequency Row adjustment, to ensure indoor heat exchanger effectiveness.Specifically, in the first controlling cycle, adjusted according to the first working frequency indoor Machine wind speed, wherein, indoor set wind speed and the linear positive correlation of the first working frequency.When i.e. working frequency is higher, corresponding indoor machine wind Speed is higher.
208th, outdoor unit wind speed is adjusted.
Outdoor unit wind speed can be adjusted according to the size of the average rate of change absolute value of indoor temperature.Mean change Rate absolute value is smaller, represents that indoor temperature change generated in case is slower, now corresponding wind speed is bigger.
Specifically, determine the average rate of change absolute value of indoor temperature in the second controlling cycle | △ T2/ T |, performing step While rapid 206 pairs of working frequencies are adjusted, in the first controlling cycle, outdoor unit wind speed is adjusted according to the average rate of change. Wherein, outdoor unit wind speed and the average rate of change of indoor temperature in the second controlling cycle are linearly negatively correlated.I.e. | △ T2/ T | it is smaller, Represent that indoor load is bigger, corresponding outdoor unit wind speed is higher.
Adjustment progress synchronous with the adjustment to working frequency to indoor set wind speed and outdoor unit wind speed, step 206 to 208 There is no sequencing.
In addition, the wind speed of indoor set or outdoor unit can include multiple gears from minimum wind speed to highest wind velocity, herein Control to wind speed exemplified by being adjusted to one of gear illustrates.If setting when working frequency be increased to it is super Rotation speed of fan increases by one grade when crossing critical value, and when working frequency drops below the critical value, rotation speed of fan reduces one grade, then When working frequency frequent fluctuation above and below the critical value, the rotating speed for causing blower fan is frequently carried out into switchback between two gears Change, therefore using the method regulation rotation speed of fan of return difference control.Specifically, setting return difference frequency, when working frequency be increased to it is super When crossing critical value, rotation speed of fan increases by one grade, keeps rotation speed of fan constant when working frequency drops below the critical value, when Working frequency further reduces on the basis of the critical value, and by rotation speed of fan reduction by one when the difference reduced exceedes return difference frequency Shelves, it thus avoid due to working frequency rotation speed of fan frequent switching caused by frequent fluctuation at critical value the problem of.
The control method for the convertible frequency air-conditioner that the present embodiment is provided, by obtaining the expected temperature difference, second temperature difference, the second work Frequency and coefficient of frequency modulation, the first working frequency is calculated by default control function according to above parameter, and in the first control Working frequency is adjusted to the first working frequency when cycle processed starts.Embodiments of the invention are provided all for the first control The control method of phase, cycle applications are in multiple controlling cycles, by the expection temperature difference and coefficient of frequency modulation of renewal, the work updated Working frequency, complete the regulation process to room temperature.For different controlling cycles, by being adjusted so that interior to the expected temperature difference Temperature smooth variation, while pass through the renewal of coefficient of frequency modulation, in the case of being reflected in different indoor loads, the change of working frequency The change of caused indoor temperature, so as to improve the degree of accuracy of frequency modulation control.Especially, temperature is warm close to setting indoors When spending, the expected temperature difference is determined by ping-pang storage algorithm, and further by the adjustment to correction coefficient in default control function, The degree of accuracy of frequency modulation control is further improved, to cause indoor temperature more gently close to design temperature, so as to improve use The comfort level at family.
Embodiment three
Based on embodiment one and embodiment two, embodiments of the invention three provide a kind of control device of convertible frequency air-conditioner, For performing the control method of the convertible frequency air-conditioner described in embodiment one and embodiment two, reference picture 5, the control of convertible frequency air-conditioner Device 50 processed includes：
Control unit 501, control unit 501 include acquisition module 5011 and setting module 5012.Acquisition module 5011, use In the 3rd temperature difference of acquisition, the 3rd working frequency.Wherein, the 3rd temperature difference be the 3rd controlling cycle in formed the indoor temperature difference, the 3rd Working frequency is working frequency of the compressor in the 3rd controlling cycle.Acquisition module 5011, be additionally operable to obtain second temperature difference and Second working frequency.Wherein, second temperature difference is the indoor temperature difference formed in the second controlling cycle, and the second working frequency is compressor Working frequency in the second controlling cycle.Second controlling cycle is to be located at the control week after the 3rd controlling cycle on timeline Phase.Setting module 5012, for obtaining the expected temperature difference.It is expected that the temperature difference is the Indoor Temperature to be formed in the first controlling cycle Difference, the first controlling cycle are to be located at the controlling cycle after the second controlling cycle on timeline.Setting module 5012, it is additionally operable to obtain Coefficient of frequency modulation is taken, coefficient of frequency modulation is by setting module 5012 according to second temperature difference, the second working frequency, the 3rd temperature difference and the 3rd work Working frequency determines.
Arithmetic element 502, for according to the expected temperature difference, second temperature difference, the second working frequency and coefficient of frequency modulation, determining the One working frequency.
Adjustment unit 503, for being operated in the first controlling cycle, control compressor according to the first working frequency.
Optionally, arithmetic element 502, specifically for the temperature difference, second temperature difference, the second working frequency and frequency modulation system will be expected Number, substitutes into following default control function：F1=F2+k(△T1—△T2)/ξ, determine the first working frequency.
Wherein, F1For the first working frequency, F2For the second working frequency, △ T1For the expected temperature difference, △ T2For second temperature difference, ξ For coefficient of frequency modulation, k is correction coefficient and k ≠ 0.
Optionally, when arithmetic element 502 determines that the absolute value of second temperature difference is more than or equal to the second predetermined threshold value, computing list Member 502, it is additionally operable to set correction coefficient more than or equal to 1.
When arithmetic element 502 determines that the absolute value of second temperature difference is less than the second predetermined threshold value, arithmetic element 502, also use It is less than 1 in setting correction coefficient.
Optionally, setting module 5012, specifically for the value according to parameter preset in the second controlling cycle, search and be expected Temperature difference table obtains the expected temperature difference, it is contemplated that the mapping that temperature difference table is used between the value for indicating parameter preset and expected temperature difference value is closed System, wherein parameter preset are the ratio of the second working frequency and second temperature difference.
Optionally, acquisition module 5011, be additionally operable to determine the second controlling cycle in indoor temperature the average rate of change or The variable quantity of indoor temperature in second controlling cycle.
Setting module 5012, it is additionally operable to the average rate of change or the variable quantity determination expection determined according to acquisition module 5011 The temperature difference.
Optionally, acquisition module 5011, be additionally operable to obtain benchmark room temperature, benchmark room temperature for the first controlling cycle it is adjacent before Indoor temperature at the end of one controlling cycle.
Setting module 5012, it is additionally operable to when benchmark room temperature is within the first room temperature section, it is true according to ping-pang storage algorithm Surely it is expected the temperature difference.Wherein, the first room temperature section is the closed interval that the length using design temperature as median is the first predetermined threshold value.
In a heating mode, optionally, setting module 5012, it is pre- specifically for the difference using target temperature and benchmark room temperature The phase temperature difference, target temperature belong to the first room temperature section.
Setting module 5012, it is additionally operable to when benchmark room temperature is less than design temperature, sets target temperature is equal to design temperature.
Setting module 5012, it is additionally operable to when benchmark room temperature is more than design temperature, sets target temperature is less than design temperature.
Optionally, acquisition module 5011, it is additionally operable to using the adjacent previous controlling cycle of the first controlling cycle as the second control Zhou Wei.
Acquisition module 5011, the adjacent previous controlling cycle using the second controlling cycle is additionally operable to as the 3rd controlling cycle.
Optionally, adjustment unit 503, it is additionally operable in the first controlling cycle, indoor set is adjusted according to the first working frequency Wind speed.
Wherein, indoor set wind speed and the linear positive correlation of the first working frequency.
Optionally, acquisition module 5011, it is additionally operable to determine the average rate of change of indoor temperature in the second controlling cycle.
Adjustment unit 503, it is additionally operable to adjust outdoor unit wind speed according to the average rate of change, wherein, outdoor unit wind speed is with being averaged Rate of change is linearly negatively correlated.
The control device for the convertible frequency air-conditioner that the present embodiment is provided, by obtaining the expected temperature difference, second temperature difference, the second work Frequency and coefficient of frequency modulation, the first working frequency is calculated by default control function according to above parameter, and in the first control Working frequency is adjusted to the first working frequency when cycle processed starts.Control device is by for the controlling party of the first controlling cycle Method, cycle applications are in multiple controlling cycles, and by the expection temperature difference and coefficient of frequency modulation of renewal, the working frequency updated is complete The regulation process of paired room temperature.For different controlling cycles, by being adjusted so that indoor temperature is gentle to the expected temperature difference Change, while by the renewal of coefficient of frequency modulation, in the case of being reflected in different indoor loads, caused by the change of working frequency The change of indoor temperature, so as to improve the degree of accuracy of frequency modulation control.Especially, when temperature is close to design temperature indoors, lead to Cross ping-pang storage algorithm and determine the expected temperature difference, and further by the adjustment to correction coefficient in default control function, further The degree of accuracy of frequency modulation control is improved, to cause indoor temperature more gently close to design temperature, so as to improve relaxing for user Appropriateness.
Embodiments of the invention also provide a kind of convertible frequency air-conditioner, including the control such as the convertible frequency air-conditioner described in embodiment three Device processed, convertible frequency air-conditioner is by improving the degree of accuracy of frequency modulation control, to cause indoor temperature more gently close to design temperature, So as to improve the comfort level of user.
Through the above description of the embodiments, it is apparent to those skilled in the art that the present invention can be with Realized with hardware, or firmware is realized, or combinations thereof mode is realized.When implemented in software, can be by above-mentioned function It is stored in computer-readable medium or is transmitted as one or more instructions on computer-readable medium or code.Meter Calculation machine computer-readable recording medium includes computer-readable storage medium and communication media, and wherein communication media includes being easy to from a place to another Any medium of individual place transmission computer program.Storage medium can be any usable medium that computer can access.With Exemplified by this but it is not limited to：Computer-readable medium can include random access memory (English full name：Random Access Memory, English abbreviation：RAM), read-only storage (English full name：Read Only Memory, English abbreviation：ROM), electricity can EPROM (English full name：Electrically Erasable Programmable Read Only Memory, English abbreviation：EEPROM), read-only optical disc (English full name：Compact Disc Read Only Memory, English Referred to as：CD-ROM) or other optical disc storages, magnetic disk storage medium or other magnetic storage apparatus or can be used in carry or Desired program code of the storage with instruction or data structure form simultaneously can be by any other medium of computer access.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained Cover within protection scope of the present invention.Therefore, protection scope of the present invention described should be defined by scope of the claims.

Claims (21)

  1. A kind of 1. control method of convertible frequency air-conditioner, it is characterised in that including：
    Obtain the 3rd temperature difference, the 3rd working frequency；Wherein, the 3rd temperature difference is the Indoor Temperature formed in the 3rd controlling cycle Difference, the 3rd working frequency are working frequency of the compressor in the 3rd controlling cycle；Obtain second temperature difference, the second work frequency Rate and the expected temperature difference；Wherein, second temperature difference is the indoor temperature difference formed in the second controlling cycle, the second work frequency Rate is working frequency of the compressor in second controlling cycle, and the expected temperature difference is is wanted shape in the first controlling cycle Into the indoor temperature difference, second controlling cycle is after the 3rd controlling cycle and positioned at described first on timeline Controlling cycle before controlling cycle；Coefficient of frequency modulation is obtained, the coefficient of frequency modulation is by second temperature difference, the second work frequency Rate, the 3rd temperature difference and the 3rd working frequency determine；Wherein, the coefficient of frequency modulation is second temperature difference and described The difference of 3rd temperature difference, the ratio with second working frequency and the difference of the 3rd working frequency；
    According to the expected temperature difference, second temperature difference, second working frequency and the coefficient of frequency modulation, the first work is determined Working frequency；Wherein, first working frequency is the difference of the expected temperature difference and second temperature difference and the coefficient of frequency modulation Ratio, plus the sum of second working frequency；
    In the first controlling cycle, compressor operates according to first working frequency.
  2. 2. according to the method for claim 1, it is characterised in that
    By the expected temperature difference, second temperature difference, second working frequency and the coefficient of frequency modulation, default control is substituted into Function, determine that the first working frequency includes：
    By the expected temperature difference, second temperature difference, second working frequency and the coefficient of frequency modulation, substitute into following default Control function：F1=F2+k(△T1—△T2)/ξ, determine the first working frequency；
    Wherein, F1For the first working frequency, F2For the second working frequency, △ T1For the expected temperature difference, △ T2For second temperature difference, ξ is tune Frequency coefficient, k are correction coefficient and k ≠ 0.
  3. 3. according to the method for claim 2, it is characterised in that
    When the absolute value of second temperature difference is more than or equal to the second predetermined threshold value, the correction coefficient is more than or equal to 1；
    When the absolute value of second temperature difference is less than second predetermined threshold value, the correction coefficient is less than 1.
  4. 4. according to the method for claim 2, it is characterised in that the expected temperature difference of acquisition includes：
    According to the value of parameter preset in second controlling cycle, search expected temperature difference table and obtain the expected temperature difference, it is described It is expected that temperature difference table is used to indicate the mapping relations between the value of the parameter preset and the expected temperature difference value, wherein described Parameter preset is the ratio of second working frequency and second temperature difference.
  5. 5. according to the method for claim 2, it is characterised in that
    Methods described also includes：Determine the average rate of change of indoor temperature or second control in second controlling cycle The variable quantity of indoor temperature in cycle；
    The expected temperature difference of acquisition includes：The expected temperature difference is determined according to the average rate of change or the variable quantity.
  6. 6. according to the method for claim 2, it is characterised in that
    Methods described also includes：Benchmark room temperature is obtained, the benchmark room temperature is the adjacent previous control of first controlling cycle Indoor temperature during end cycle；
    The expected temperature difference of acquisition includes：When the benchmark room temperature is within the first room temperature section, according to ping-pang storage algorithm Determine the expected temperature difference；Wherein, the first room temperature section is the first default threshold for the length using design temperature as median The closed interval of value.
  7. 7. according to the method for claim 6, it is characterised in that in a heating mode, described true according to ping-pang storage algorithm The fixed expected temperature difference, including：
    Belong to first room-temperature zone by the expected temperature difference, the target temperature of the difference of target temperature and the benchmark room temperature Between；
    When the benchmark room temperature is less than the design temperature, the target temperature is equal to the design temperature；
    When the benchmark room temperature is more than the design temperature, the target temperature is less than the design temperature.
  8. 8. according to the method described in claim any one of 1-7, it is characterised in that
    Second controlling cycle is the adjacent previous controlling cycle of first controlling cycle；
    3rd controlling cycle is the adjacent previous controlling cycle of second controlling cycle.
  9. 9. according to the method described in claim any one of 1-7, it is characterised in that methods described also includes：
    In first controlling cycle, indoor set wind speed is adjusted according to the first working frequency；
    Wherein, indoor set wind speed and the linear positive correlation of the first working frequency.
  10. 10. according to the method described in claim any one of 1-7, it is characterised in that methods described also includes：
    Determine the average rate of change of indoor temperature in second controlling cycle；
    Outdoor unit wind speed is adjusted according to the average rate of change, wherein, outdoor unit wind speed and the linear negative of the average rate of change Close.
  11. A kind of 11. control device of convertible frequency air-conditioner, it is characterised in that including：
    Control unit, described control unit include acquisition module and setting module；The acquisition module, for obtaining the 3rd temperature Difference, the 3rd working frequency；Wherein, the 3rd temperature difference is the indoor temperature difference formed in the 3rd controlling cycle, the 3rd work Frequency is working frequency of the compressor in the 3rd controlling cycle；The acquisition module, it is additionally operable to obtain second temperature difference and second Working frequency；Wherein, second temperature difference is the indoor temperature difference formed in the second controlling cycle, and second working frequency is pressure Working frequency of the contracting machine in second controlling cycle；Second controlling cycle is positioned at the described 3rd control on timeline Controlling cycle after cycle；The setting module, for obtaining the expected temperature difference；The expected temperature difference is in the first controlling cycle The interior indoor temperature difference to be formed, first controlling cycle are to be located at the control after second controlling cycle on timeline Cycle；The setting module, it is additionally operable to obtain coefficient of frequency modulation, the coefficient of frequency modulation is by the setting module according to the described second temperature Poor, described second working frequency, the 3rd temperature difference and the 3rd working frequency determine；Wherein, the coefficient of frequency modulation is The difference of second temperature difference and the 3rd temperature difference, with the difference of second working frequency and the 3rd working frequency Ratio；
    Arithmetic element, for according to the expected temperature difference, second temperature difference, second working frequency and the frequency modulation system Number, determines the first working frequency；Wherein, first working frequency be the expected temperature difference and second temperature difference difference with The ratio of the coefficient of frequency modulation, plus the sum of second working frequency；
    Adjustment unit, for being operated in the first controlling cycle, control compressor according to first working frequency.
  12. 12. control device according to claim 11, it is characterised in that
    The arithmetic element, specifically for by the expected temperature difference, second temperature difference, second working frequency and described Coefficient of frequency modulation, substitute into following default control function：F1=F2+k(△T1—△T2)/ξ, determine the first working frequency；
    Wherein, F1For the first working frequency, F2For the second working frequency, △ T1For the expected temperature difference, △ T2For second temperature difference, ξ is tune Frequency coefficient, k are correction coefficient and k ≠ 0.
  13. 13. control device according to claim 12, it is characterised in that
    When the arithmetic element determines that the absolute value of second temperature difference is more than or equal to the second predetermined threshold value, the computing list Member, it is additionally operable to set the correction coefficient more than or equal to 1；
    When the arithmetic element determines that the absolute value of second temperature difference is less than second predetermined threshold value, the computing list Member, it is additionally operable to set the correction coefficient less than 1.
  14. 14. control device according to claim 12, it is characterised in that
    The setting module, specifically for the value according to parameter preset in second controlling cycle, search expected temperature difference table Obtain the expected temperature difference, the expected temperature difference table be used to indicating the parameter preset value and the expected temperature difference value it Between mapping relations, wherein the parameter preset is the ratio of second working frequency and second temperature difference.
  15. 15. control device according to claim 12, it is characterised in that
    The acquisition module, it is additionally operable to determine the average rate of change of indoor temperature or described second in second controlling cycle The variable quantity of indoor temperature in controlling cycle；
    The setting module, it is additionally operable to the average rate of change or the variable quantity determination determined according to the acquisition module The expected temperature difference.
  16. 16. control device according to claim 12, it is characterised in that
    The acquisition module, it is additionally operable to obtain benchmark room temperature, the benchmark room temperature is adjacent previous for first controlling cycle Indoor temperature at the end of controlling cycle；
    The setting module, it is additionally operable to when the benchmark room temperature is within the first room temperature section, it is true according to ping-pang storage algorithm The fixed expected temperature difference；Wherein, the first room temperature section is the first predetermined threshold value for the length using design temperature as median Closed interval.
  17. 17. control device according to claim 16, it is characterised in that in a heating mode,
    The setting module, specifically for using the difference of target temperature and the benchmark room temperature as the expected temperature difference, the target Temperature belongs to the first room temperature section；
    The setting module, it is additionally operable to, when the benchmark room temperature is less than the design temperature, set the target temperature and be equal to The design temperature；
    The setting module, it is additionally operable to, when the benchmark room temperature is more than the design temperature, set the target temperature and be less than The design temperature.
  18. 18. according to the control device described in claim any one of 11-17, it is characterised in that
    The acquisition module, it is additionally operable to using the adjacent previous controlling cycle of first controlling cycle as the described second control week For；
    The acquisition module, it is additionally operable to using the adjacent previous controlling cycle of second controlling cycle as the described 3rd control week Phase.
  19. 19. according to the control device described in claim any one of 11-17, it is characterised in that
    The adjustment unit, it is additionally operable in first controlling cycle, indoor set wind speed is adjusted according to the first working frequency；
    Wherein, indoor set wind speed and the linear positive correlation of the first working frequency.
  20. 20. according to the control device described in claim any one of 11-17, it is characterised in that
    The acquisition module, it is additionally operable to determine the average rate of change of indoor temperature in second controlling cycle；
    The adjustment unit, be additionally operable to according to the average rate of change adjust outdoor unit wind speed, wherein, outdoor unit wind speed with it is described The average rate of change is linearly negatively correlated.
  21. 21. a kind of convertible frequency air-conditioner, it is characterised in that including the control device as described in claim any one of 11-20.
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