CN104236018B

CN104236018B - Air conditioner control method and air conditioner control device

Info

Publication number: CN104236018B
Application number: CN201410453966.0A
Authority: CN
Inventors: 党彦波; 严光; 张国柱
Original assignee: Midea Group Wuhan Refrigeration Equipment Co Ltd
Current assignee: Midea Group Wuhan Refrigeration Equipment Co Ltd
Priority date: 2014-09-05
Filing date: 2014-09-05
Publication date: 2017-05-10
Anticipated expiration: 2034-09-05
Also published as: CN104236018A

Abstract

The invention discloses an air conditioner control method, which comprises the following steps that the indoor temperature is detected; a difference value between the indoor temperature and the temperature set by a user is calculated according to the indoor temperature and the temperature set by the user; the initial operation frequency increment of an air conditioner compressor is calculated according to the difference value and a fuzzy control rule, and the initial operation frequency is calculated according to the initial operation frequency increment for controlling the compressor to operate at the initial operation frequency; the operation time of the compressor is detected; when the operation time is greater than the preset time, and if the absolute value of the difference value is smaller than or equal to a preset threshold value, the operation frequency modification value is calculated according to the difference value and a PID (proportion integration differentiation) control model, and in addition, the operation frequency modification value is overlapped onto the initial operation frequency for controlling the compressor to operate at the modified operation frequency. Therefore the operation frequency of the compressor can realize fast response to the load change, the fast refrigeration and heating can be realized, meanwhile, the temperature can be precisely controlled, and the energy sources can be effectively saved. The invention also discloses an air conditioner control device.

Description

The control method of air-conditioner and the control device of air-conditioner

Technical field

The present invention relates to technical field of electric appliances, is related specifically to a kind of control method of air-conditioner and a kind of control of air-conditioner Device processed.

Background technology

Convertible frequency air-conditioner can automatically adjust the frequency of compressor operating with the change of air conditioner load, i.e., can pass through Change the rotating speed of compressor to adapt to the change of load, so as to reducing power consumption, reducing loss.Therefore, with people's awareness of saving energy Raising, transducer air conditioning obtained increasing application.

The transducer air conditioning of correlation technique is generally controlled using following two methods to frequency：The first, according to room Internal and external environment and user setting temperature and carry out FREQUENCY CONTROL automatically according to default program, but, user cannot be arranged Frequency operational mode and parameter；It two is：The temperature that set according to indoor and outdoor surroundingses and user is simultaneously automatic according to default program FREQUENCY CONTROL is carried out, while user can also arrange frequency operational mode and parameter.

However, there is following defect in the control method of the transducer air conditioning of correlation technique：Due to the tool to air-conditioner application The load prediction of body environment is forbidden, and frequency is often higher or less than normal, and this is resulted in, and power consumption is big, and noise is big, heats refrigeration effect Really bad the problems such as, it is additionally, since convertible frequency air-conditioner in operation, load is being continually changing, and the control method of correlation technique is not The change of response load that can be quickly, or simply so also just had a strong impact on according to a fixed frequency-invariant operation The energy-saving effect and air-conditioning of air-conditioning gives people the comfortableness brought.Therefore, the control method of the air-conditioner in correlation technique exists and changes The needs for entering.

The content of the invention

It is contemplated that at least solving one of above-mentioned technical problem to a certain extent.

For this purpose, it is an object of the present invention to proposing a kind of control method of air-conditioner, the control method can be realized The change of quick response load, reaches the effect that fast-refrigerating is heated, while also can accurately control to temperature.

Further object is that proposing a kind of control device of air-conditioner.

To reach above-mentioned purpose, a kind of control method of air-conditioner that one aspect of the present invention embodiment is proposed, its feature exists In comprising the following steps：Detection indoor temperature；The indoor temperature according to the temperature computation that the indoor temperature and user set And difference DELTA T between the temperature of user's setting；According to difference DELTA T and default fuzzy control rule are calculated The initial launch frequency increment of the compressor of air-conditioner, and the pressure is calculated according to the initial launch frequency increment of the compressor The initial launch frequency of contracting machine is run with controlling the compressor according to the initial launch frequency；Detect the fortune of the compressor The row time；When the run time of the compressor is more than or equal to the Preset Time, if the absolute value of difference DELTA T is little In equal to predetermined threshold value, then the operation frequency of the compressor is calculated according to difference DELTA T and the PID control model for pre-building Rate correction value, and by the running frequency correction value of the compressor be added to the compressor initial launch frequency to control State compressor to run according to revised running frequency.

The control method of the air-conditioner for proposing according to embodiments of the present invention, by detecting indoor temperature, according to indoor temperature And difference DELTA T between the temperature computation indoor temperature of user's setting and the temperature of user's setting, and according to difference DELTA T and preset Fuzzy control rule calculate air-conditioner compressor initial launch frequency increment, and according to the initial launch frequency of compressor The initial launch frequency of incremental computations compressor is run with controlling compressor according to initial launch frequency, while by detecting compression The run time of machine, when the run time of compressor is more than or equal to Preset Time, if the absolute value of difference DELTA T is less than or equal to Predetermined threshold value, then calculate the running frequency correction value of compressor according to difference DELTA T and the PID control model for pre-building, and will The running frequency correction value of compressor be added to compressor initial launch frequency to control compressor according to revised operation Frequency is run.Thus, the control method is controlled with reference to fuzzy control and PID control to the running frequency of compressor, can The change of the running frequency quick response load of compressor is realized, the effect that fast-refrigerating is heated is reached, while also can be to temperature Degree accurately controlled, can the effectively save energy, improve user comfortableness.

In one embodiment of the invention, before the compressor is controlled according to initial launch frequency operation also Including：Detect the input voltage of the whole machine；Detection outdoor temperature；Judge whether the input voltage of the whole machine is electric more than first Press threshold value and whether the outdoor temperature is less than or equal to preset temperature threshold value；If the input voltage of the whole machine is more than described First voltage threshold value and the outdoor temperature are less than or equal to the preset temperature threshold value, then control the operation frequency of the compressor Rate is run to the initial launch frequency with high frequency Starting mode.

In one embodiment of the invention, the compressor is being controlled according to the operation of initial launch frequency or the amendment Include before running frequency operation afterwards：Detect the delivery temperature of the compressor, evaporator temperature, the input voltage of whole machine and Whole machine input current；If the delivery temperature is more than second temperature threshold more than the first temperature threshold or the evaporator temperature Value, then the initial launch frequency to the compressor or the revised running frequency are entered trip temperature limit frequency and are processed to control State compressor and the running frequency operation after frequency is processed is limited according to temperature；If the input voltage of the whole machine is more than second voltage threshold Value or the whole machine input current are more than current threshold, then the initial launch frequency to the compressor or described revised Running frequency carries out voltage x current limit frequency and processes to control the operation after the compressor is processed according to voltage x current limit frequency Frequency is run.

Specifically, in one embodiment of the invention, the running frequency of the compressor can be calculated according to below equation Correction value：

f₁(k)=f₁(k-1)+[(K_P+K_I+K_D)ΔT(k)-(K_P+2K_D)ΔT(k-1)+K_DΔT(k-2)]

Wherein, f₁(k) for compressor described in the k moment running frequency correction value, f₁(k-1) it is compressor described in the k-1 moment Running frequency correction value, K_PFor PID control proportionality coefficient, K_IFor PID control integral coefficient, K_DFor PID control differential coefficient, Δ T (k) is the difference between the temperature that the k moment calculated indoor temperature and the user set, and Δ T (k-1) is Difference between the k-1 moment calculated indoor temperature and the temperature of user setting, Δ T (k-2) is the k-2 moment Difference between the calculated indoor temperature and the temperature of user setting.

In one embodiment of the invention, increment Delta f of the running frequency correction value₁(k)=(K_P+K_I+K_D)ΔT (k)-(K_P+2K_D)ΔT(k-1)+K_DΔ T (k-2), if increment Delta f₁K () is more than the first predetermined threshold value or less than second Predetermined threshold value, then to increment Delta f₁K () carries out amplitude limiting processing to control the compressor according to the operation after amplitude limiting processing Frequency is run, wherein, first predetermined threshold value is more than second predetermined threshold value.

To reach above-mentioned purpose, another aspect of the present invention embodiment proposes a kind of control device of air-conditioner, including：Room Outer machine controller, for controlling compressor operating；First temperature-detecting device, for detecting indoor temperature；Timer, for examining Survey the run time of the compressor；Indoor machine controller, the indoor machine controller is led to the outdoor controller Letter, the indoor machine controller is used for indoor temperature described in the temperature computation that sets according to the indoor temperature and user and described Difference DELTA T between the temperature of user's setting, and the air-conditioning is calculated according to difference DELTA T and default fuzzy control rule The initial launch frequency increment of the compressor of device, and the compressor is calculated according to the initial launch frequency increment of the compressor Initial launch frequency so that the outdoor controller controls the compressor and runs according to the initial launch frequency, work as institute When the run time for stating compressor is more than or equal to Preset Time, if the absolute value of difference DELTA T is less than or equal to predetermined threshold value, Then the indoor machine controller calculates the operation of the compressor according to difference DELTA T and the PID control model for pre-building Frequency correction value, and by the running frequency correction value of the compressor be added to the compressor initial launch frequency so that institute State the outdoor controller control compressor to run according to revised running frequency.

The control device of the air-conditioner for proposing according to embodiments of the present invention, by the first temperature-detecting device Indoor Temperature is detected Degree, between the temperature that the temperature computation indoor temperature and user that indoor machine controller sets according to indoor temperature and user sets Difference DELTA T, and the initial launch frequency increasing of the compressor of air-conditioner is calculated according to difference DELTA T and default fuzzy control rule Amount, and the initial launch frequency of compressor is calculated so that outdoor controller control according to the initial launch frequency increment of compressor Compressor runs according to initial launch frequency, while the run time of compressor is detected by timer, when the operation of compressor When time is more than or equal to Preset Time, if the absolute value of difference DELTA T is less than or equal to predetermined threshold value, indoor machine controller according to Difference DELTA T and the PID control model that pre-builds calculate the running frequency correction value of compressor, and by the running frequency of compressor Correction value be added to compressor initial launch frequency so that outdoor controller control compressor according to it is revised operation frequency Rate is run.Thus, the method for being combined using fuzzy control and PID control in the control device is entered to the running frequency of compressor Row control, can realize the change of the running frequency quick response load of compressor, reach the effect that fast-refrigerating is heated, while Also temperature can be accurately controlled, can the effectively save energy, improve user comfortableness.

In one embodiment of the invention, the control device of described air-conditioner also includes：Voltage detection module, is used for Detect the input voltage of the whole machine；Second temperature detection module, for detecting outdoor temperature；Wherein, the off-premises station control Whether device is additionally operable to judge the input voltage of the whole machine more than first voltage threshold value and whether the outdoor temperature is less than or waits In preset temperature threshold value, if the input voltage of the whole machine more than the first voltage threshold value and the outdoor temperature be less than or Equal to the preset temperature threshold value, then the running frequency of the outdoor controller control compressor is with high frequency Starting mode Run to the initial launch frequency.

In one embodiment of the invention, the control device of described air-conditioner also includes：3rd temperature-detecting device, For detecting the delivery temperature of the compressor；4th temperature-detecting device, for detecting the evaporator temperature of the compressor； Current sensing means, for detecting whole machine input current；Wherein, if the delivery temperature is more than the first temperature threshold or institute State evaporator temperature and be more than second temperature threshold value, then initial launch frequency or institute of the outdoor controller to the compressor State revised running frequency to enter trip temperature limit frequency process to control the operation frequency after the compressor is processed according to temperature limit frequency Rate is run, if the input voltage of the whole machine is more than current threshold more than second voltage threshold value or the whole machine input current Value, then the outdoor controller carries out voltage to the initial launch frequency or the revised running frequency of the compressor Electric current limit frequency processes and the running frequency operation after frequency is processed is limited according to the voltage x current to control the compressor.

Specifically, in one embodiment of the invention, the indoor machine controller calculates the pressure according to below equation The running frequency correction value of contracting machine：

f₁(k)=f₁(k-1)+[(K_P+K_I+K_D)ΔT(k)-(K_P+2K_D)ΔT(k-1)+K_DΔT(k-2)]

In one embodiment of the invention, increment Delta f of the running frequency correction value₁(k)=(K_P+K_I+K_D)ΔT (k)-(K_P+2K_D)ΔT(k-1)+K_DΔ T (k-2), if increment Delta f₁K () is more than the first predetermined threshold value or less than second Predetermined threshold value, then the indoor machine controller is to increment Delta f₁K () carries out amplitude limiting processing so that the outdoor controller Control the compressor to run according to the running frequency after amplitude limiting processing, wherein, first predetermined threshold value is more than described second Predetermined threshold value.

The additional aspect of the present invention and advantage will be set forth in part in the description, and partly will become from the following description Obtain substantially, or recognized by the practice of the present invention.

Description of the drawings

The above-mentioned and/or additional aspect of the present invention and advantage will become from the following description of the accompanying drawings of embodiments It is substantially and easy to understand, wherein：

Fig. 1 is the flow chart of the control method of the air-conditioner according to the embodiment of the present invention；

Fig. 2 is the flow process of the determination methods that the control method medium-high frequency of the air-conditioner according to one embodiment of the invention starts Figure；

Fig. 3 is the flow chart that frequency processing method is limited in control method according to the air-conditioner of another embodiment of the present invention；

Fig. 4 be the determination methods that the control method medium-high frequency of the air-conditioner according to a specific embodiment of the invention starts and The flow chart of limit frequency processing method；

Fig. 5 is the flow chart of the control method of the air-conditioner according to a specific embodiment of the invention；

Fig. 6 is the block diagram of the control device of the air-conditioner according to the embodiment of the present invention；And

Fig. 7 is the block diagram of the control device of the air-conditioner according to one embodiment of the invention.

Reference：

Compressor 1, outdoor controller 2, the first temperature-detecting device 3, timer 4, indoor machine controller 5, voltage inspection Survey module 6, second temperature detection module 7, the 3rd temperature-detecting device 8, the 4th temperature-detecting device 9 and current sensing means 10。

Specific embodiment

Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from start to finish Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not construed as limiting the claims.

Following disclosure provides many different embodiments or example is used for realizing the different structure of the present invention.For letter Change disclosure of the invention, hereinafter the part and setting of specific examples are described.Certainly, they are only merely illustrative, and Purpose does not lie in the restriction present invention.Additionally, the present invention can in different examples repeat reference numerals and/or letter.It is this heavy It is again the relation between itself not indicating discussed various embodiments and/or arranging for purposes of simplicity and clarity.This Outward, the invention provides various specific technique and material example, but those of ordinary skill in the art can be appreciated that The applicable property of other techniques and/or the use of other materials.In addition, fisrt feature described below second feature it " on " structure can include that the first and second features be formed as the embodiment of directly contact, it is also possible to including other feature shape Into the embodiment between the first and second features, such first and second feature may not be directly contact.

In describing the invention, it should be noted that unless otherwise prescribed and limit, term " installation ", " connected ", " connection " should be interpreted broadly, for example, it may be mechanically connected or electrical connection, or the connection of two element internals, can Being to be joined directly together, it is also possible to be indirectly connected to by intermediary, for the ordinary skill in the art, can basis Concrete condition understands the concrete meaning of above-mentioned term.

With reference to the accompanying drawings describing control method and the control of air-conditioner of the air-conditioner of proposition according to embodiments of the present invention Device processed.

Fig. 1 is the flow chart of the control method of the air-conditioner according to the embodiment of the present invention.As shown in figure 1, the air-conditioner Control method is comprised the following steps：

S1：Detection indoor temperature.

S2：Difference between the temperature computation indoor temperature set according to indoor temperature and user and the temperature of user's setting ΔT。

That is, when air-conditioner initial power-on, detecting indoor temperature T1, and obtain temperature TS and use of user's setting The operational mode of family setting, and temperature TS of indoor temperature T1 and user's setting is calculated according to indoor temperature T1 and design temperature TS Between difference DELTA T, for example, Δ T=TS-T1.

In a specific example of the present invention, temperature TS of the receive users such as remote control, control panel setting can be passed through And operational mode.

S3：The initial launch frequency that the compressor of air-conditioner is calculated according to difference DELTA T and default fuzzy control rule increases Amount, and the initial launch frequency of compressor is calculated to control compressor according to initial according to the initial launch frequency increment of compressor Running frequency is run.

That is, when air-conditioner initial power-on, obtaining in current indoor initially with default fuzzy control rule The initial launch frequency of compressor under outer working condition, wherein, fuzzy control rule can be designed according to the comfortableness of human body, specifically Ground, when air-conditioner initial power-on, can be according to the difference between current indoor environment temperature T1 (n) and temperature TS of user's setting Value Δ T (n) and current difference DELTA T (n) and front once current difference DELTA T (n-1), and inquire about present mode of operation correspondence Increment Delta f0 (n) of current initial launch frequency that draws of fuzzy control rule table, further, according to current initial launch Increment Delta f0 (n) of frequency and front initial launch frequency f0 (n-1) obtain current initial launch frequency f0 (n), i.e., initially The computational methods of running frequency are：F0 (n)=f0 (n-1)+Δ f0 (n), wherein, n is positive integer, and n represents n-th initial control Cycle, i.e. initial launch frequency f0 (n) carry out an iteration renewal in each initial controlling cycle, and f0 (0) is original frequency Value, can according to circumstances set.

When normal work after air-conditioner start, every an initial controlling cycle, an indoor environment temperature is just obtained T1 and temperature TS of user's setting, so, when into each initial controlling cycle, can calculate an initial launch frequency Rate, further controls compressor and runs according to the initial launch frequency for calculating, for example, when into n-th controlling cycle, can Initial launch frequency f0 (n) is calculated, control compressor runs according to initial launch frequency f0 (n).

It is understood that air-conditioner may include plurality of operating modes, and for example, refrigeration mode, heating mode, dehumidification mode Deng, wherein, every kind of operational mode can correspond to a fuzzy control rule table.

S4：The run time of detection compressor.

S5：When the run time of compressor is more than or equal to Preset Time, if the absolute value of difference DELTA T is less than or equal to pre- If threshold value, then according to difference DELTA T and pre-build PID (Proportion Integration Differentiation, than Example integral differential) Controlling model calculates the running frequency correction value of compressor, and the running frequency correction value of compressor is superimposed Run according to revised running frequency with controlling compressor to the initial launch frequency of compressor.

That is, after compressor stable operation Preset Time such as 5 minutes, compressor just belongs to stable operation, Afterwards, by with default control intermittent scanning indoor temperature T1 and calculate indoor temperature T1 and user setting temperature TS between difference Δ T, for example, the default control cycle can be Millisecond, that is, say, can be with default control computation of Period difference DELTA T of Millisecond.

Specifically, when the running frequency of compressor has reached stable operation, it is every a default control cycle Difference DELTA T is calculated, afterwards, judges the absolute value of difference DELTA T whether less than or equal to predetermined threshold value M.If difference DELTA T Absolute value be more than predetermined threshold value M, then still control compressor according to initial launch frequency run, for example, now at the beginning of n-th During beginning controlling cycle, control compression runs according to initial launch frequency f0 (n).If the absolute value of difference DELTA T less than etc. In predetermined threshold value M, then the control method for frequency of the compressor for adopting before is converted into into temperature PID control method, in other words, During control compressor runs according to the initial launch frequency that fuzzy control rule is calculated, i.e., using FREQUENCY CONTROL side During method is controlled compressor, if meeting the condition of | T1-TS |≤M, switch to adopt temperature PID control automatically Method is controlled to compressor.After into temperature PID control, first according to difference DELTA T and the PID control mould for pre-building Type calculates the running frequency correction value of compressor, and calculated running frequency correction value is superimposed upon the initial fortune of compressor In line frequency, you can obtain revised running frequency, and control compressor running according to revised running frequency.For example, In n-th initial controlling cycle, temperature PID control method is converted into by the control method for frequency of compressor, then initial launch Frequency is f0 (n), and running frequency correction value can be superimposed upon in initial launch frequency f0 (n).

Specifically, in one embodiment of the invention, the running frequency amendment of compressor can be calculated according to below equation Value：

f₁(k)=f₁(k-1)+[(K_P+K_I+K_D)ΔT(k)-(K_P+2K_D)ΔT(k-1)+K_DΔT(k-2)]

Wherein, f₁(k) for k moment compressors running frequency correction value, f₁(k-1) it is the operation frequency of k-1 moment compressors Rate correction value, K_PFor PID control proportionality coefficient, K_IFor PID control integral coefficient, K_DFor PID control differential coefficient, Δ T (k) is k Difference between moment calculated indoor temperature and the temperature of user's setting, Δ T (k-1) is that the k-1 moment is calculated Difference between indoor temperature and the temperature of user's setting, Δ T (k-2) is k-2 moment calculated indoor temperature and user Difference between the temperature of setting.

Specifically, temperature TS of user's setting can be target temperature, indoor temperature T1 can as feedback temperature, by This may make up a temperature PID control system, wherein, the input quantity of PID controller is temperature TS and the interior of user's setting Difference DELTA T between temperature T1, while running frequency correction value of the controlled quentity controlled variable of the output of PID controller for compressor.

It should be noted that PID controller is combined by proportional component, integral element and differentiation element.Wherein, ratio ring The temperature deviation between temperature TS and indoor temperature T1 for proportionally reacting user's setting, i.e. difference DELTA T (t) are saved, partially Once producing, controller produces immediately control action to reduce deviation difference；Integral element is mainly used in eliminating steady-state error i.e. temperature Degree static difference, so as to improve temperature control precision；Differentiation element is capable of the rate of change that the rate of change of stock dividends signal is temperature, And an effective early stage revise signal can be introduced before deviation becomes too big, and so as to accelerate the control speed of system, reduction Regulating time.

Specifically, positional PID control calculation can be adopted to calculate the running frequency correction value of compressor, i.e.,：

Wherein, f₁(k) for k moment compressors running frequency correction value, K_PFor PID control proportionality coefficient, K_IFor PID controls Integral coefficient processed, K_DFor PID control differential coefficient, Δ T (k) is the temperature that k moment calculated indoor temperature and user set Difference between degree, the difference between the temperature that Δ T (k-1) sets for k-1 moment calculated indoor temperature and user, Δ Difference between the temperature that T (j) sets for j moment calculated indoor temperature and user, u₀For initial value, can set in advance It is fixed, such as u₀Can be 0.

Further, from formula (1), f₁K () is relevant with difference DELTA T at past each moment, right during calculating The Δ T at each moment is added up, and operand is larger, therefore, it can turn the positional PID control calculation shown in formula (1) Incremental timestamp algorithm is changed to, i.e.,：

Wherein, Δ f₁K () is the increment of the running frequency correction value of k moment compressors.

Further abbreviation is carried out to formula (2), you can obtain：

Δf₁(k)=(K_P+K_I+K_D)ΔT(k)-(K_P+2K_D)ΔT(k-1)+K_DΔT(k-2)(3)

Wherein, definable PID control differential coefficientPID control integral coefficientFormula (3) Can be further simplified as：

Δf₁(k)=q₀ΔT(k)+q₁ΔT(k-1)+q₂ΔT(k-2) (4)

Wherein, τ_dFor differential gain coefficient, T_SFor default control cycle, τ₀For integration gain factor.

Further it will be understood that the increment of the simply controlled quentity controlled variable obtained using incremental timestamp algorithm, that is, compressed Increment Delta f of the running frequency correction value of machine₁(k).Say, when using incremental timestamp algorithm, by calculated It is increment Delta f of running frequency correction value₁(k), increment Delta f₁K it is the increment of this executing agency position that () corresponding, rather than The physical location of correspondence executing agency, therefore, executing agency must have the function that the increment to controlled quentity controlled variable is accumulated, could be complete The paired control operation of controlled device, or software may also be employed realizing the accumulation of the increment to controlled quentity controlled variable, for example, using with Lower formula f₁(k)=f₁(k-1)+Δf₁K the sequencing of () is completing.

Thus, according to incremental timestamp algorithm, the recurrence formula of positional PID control calculation can be obtained, that is, is sayed, In one embodiment of the present of invention, the running frequency correction value of compressor can be calculated according to below equation：

Further bring formula (4) into formula (5), formula (5) can also abbreviation be：

f₁(k)=f₁(k-1)+q₀ΔT(k)+q₁ΔT(k-1)+q₂ΔT(k-1)

Thus, according to formula (5), when using the positional PID control calculation obtained according to incremental timestamp algorithm Recurrence formula is running frequency correction value f that the temperature PID control algorithm of the embodiment of the present invention calculates compressor₁When (k), every During one step is calculated, only running frequency correction value f once calculated before pid control algorithm need to be stored₁(k-1) and front obtain twice Difference DELTA T (k-1) and Δ T (k-2), you can calculate running frequency correction value f of compressor₁K (), amount of calculation is less.

When temperature TS or indoor temperature T1 of user's setting change, obtained according to incremental timestamp algorithm due to adopting The recurrence formula of the positional PID control calculation for obtaining, then temperature TS or indoor temperature of response user's setting that will be quickly The change of T1 is exporting running frequency correction value f₁K (), running frequency correction value is added to initial launch frequency, so as to The revised running frequency for obtaining, i.e. f₁K ()+f0 (n), at this moment, compressor will continue to transport with revised running frequency OK so that indoor temperature T1 rapidly follows and reach temperature TS of user's setting.

In other words, after temperature PID control is converted into, the running frequency of compressor is exactly on the basis of initial launch frequency On carried out simple amendment, that is to say, that the running frequency of compressor will be with the control that temperature PID control algorithm is calculated Amount processed is modified.

In a specific example of the present invention, the calculating cycle of the temperature PID control algorithm of the embodiment of the present invention can be 60S, that is to say, that after being converted into and being controlled to compressor using temperature PID control algorithm, temperature PID control algorithm can Calculate once every 60S, generate a new running frequency correction value.

In addition, in one embodiment of the invention, increment Delta f of running frequency correction value₁(k)=(K_P+K_I+K_D)ΔT (k)-(K_P+2K_D)ΔT(k-1)+K_DΔ T (k-2), if increment Delta f₁K () is default more than the first predetermined threshold value or less than second Threshold value, then to increment Delta f₁K () carries out amplitude limiting processing and is run according to the running frequency after amplitude limiting processing with controlling compressor, its In, the first predetermined threshold value is more than the second predetermined threshold value.Also, the first predetermined threshold value can be with the absolute value phase of the second predetermined threshold value Deng.

That is, needing increment Delta f of the running frequency correction value to obtaining using incremental timestamp algorithm₁(k) Amplitude limiting processing is carried out, by increment Delta f₁K () is limited between the second predetermined threshold value-Um and the first predetermined threshold value+Um.Say, when Increment Delta f₁K () is more than the first predetermined threshold value, can be by increment Delta f₁K () amplitude limit is+Um；When increment Delta f₁K () is default less than second Threshold value, can be by increment Delta f₁K () amplitude limit is-Um.

In such manner, it is possible to prevent using the calculated running frequency correction value of temperature PID algorithm and revised operation frequency Rate unusual fluctuations, improve the stability and reliability of control.

In addition, it should be noted that, inertial element filtering can be carried out for each temperature for detecting, for example, the time is normal The sufficiently large first order inertial loop of number, i.e. low-pass first order filter, wherein, time constant can be more than 0.1 second, thus, it is possible to anti- Only because external disturbance produces misoperation or controller exports unstable situation.

Specifically, according to another embodiment of the invention, as shown in figure 5, the control method is comprised the following steps：

S201：Obtain the temperature of indoor temperature and user's setting.

S202：According to difference DELTA T between temperature TS that indoor temperature T1 and user set and default fuzzy control rule Then calculate the initial launch frequency of the compressor of air-conditioner.

S203：Control compressor runs according to initial launch frequency.

S204：The run time of detection compressor.

S205：Judge compressor whether continuous operating time Preset Time.If it is, execution step S206；If not, Then re-execute step S205.

S206：Judge the absolute value of difference DELTA T whether less than or equal to predetermined threshold value M.If it is, execution step S207； If it is not, then re-executing step S206.

S207：The running frequency correction value of compressor is calculated according to difference DELTA T and the PID control model for pre-building.

S208：The running frequency correction value of compressor is added to the initial launch frequency of compressor.

S209：Control compressor runs according to revised running frequency.

Further, in one embodiment of the invention, as shown in Fig. 2 in control compressor according to initial launch frequency Also include before rate operation：

S10：Detect the input voltage of whole machine.

S20：Detection outdoor temperature.

S30：Judge the input voltage of whole machine whether more than first voltage threshold value and whether outdoor temperature is less than or equal to pre- If temperature threshold.

S40：If the input voltage of whole machine is more than first voltage threshold value and outdoor temperature is less than or equal to preset temperature threshold Value, the then running frequency for controlling compressor is run to initial launch frequency with high frequency Starting mode.

When air-conditioner just starts, before control compressor is according to the operation of initial launch frequency, it will judge whether symbol Close high frequency entry condition, high frequency entry condition is the input voltage of whole machine more than first voltage threshold value and outdoor temperature is less than or Equal to preset temperature threshold value.If meeting high frequency entry condition, high frequency active flag set, the Starting mode of compressor is exactly High frequency Starting mode, i.e., the running frequency that compressor is controlled in the way of high frequency startup reaches initial launch frequency, wherein, high frequency The mode of startup is exactly that the running frequency for making compressor promptly increases to initial launch frequency.If not meeting high frequency trip bar Part, i.e., the input voltage of whole machine is more than preset temperature threshold value less than or equal to first voltage threshold value or outdoor temperature, then normally start Flag set, the Starting mode of compressor is exactly normal Starting mode, i.e., the operation of compressor is controlled in the way of normal startup Frequency reaches initial launch frequency, wherein, the normal mode for starting is exactly the running frequency for making compressor with normal speed increase To initial launch frequency.

Further, in another embodiment of the present invention, as shown in figure 3, in control compressor according to initial launch Also include before frequency is run or revised running frequency is run：

S50：Detect delivery temperature, evaporator temperature, the input voltage of whole machine and the whole machine input current of compressor.

S60：If delivery temperature is more than second temperature threshold value more than the first temperature threshold or evaporator temperature, to pressure The initial launch frequency or revised running frequency of contracting machine enters trip temperature limit frequency and processes to control compressor according to temperature limit frequency Running frequency operation after process.

S70：If the input voltage of whole machine is more than current threshold more than second voltage threshold value or whole machine input current, The initial launch frequency or revised running frequency of compressor are carried out voltage x current limit frequency process with control compressor according to Running frequency after voltage x current limit frequency is processed is run.

That is, after initial launch frequency or revised running frequency is obtained, can then determine whether temperature Degree limit frequency and/or Current Voltage limit frequency, if temperature limit frequency, i.e., delivery temperature is more than the first temperature threshold or evaporimeter temperature Degree is more than second temperature threshold value, then temperature limit frequency flag set, calls temperature to limit sound interval sequence so that initial launch frequency or amendment Running frequency afterwards is reduced；If voltage x current limit frequency, i.e., the input voltage of whole machine is more than second voltage threshold value or whole machine Input current is more than current threshold, then voltage x current limit frequency flag set, calls voltage x current to limit sound interval sequence so that initial launch Frequency or revised running frequency are reduced.So, after have passed through temperature limit frequency and/or Current Voltage limit frequency, compressor just Beginning running frequency or revised running frequency will be updated, and then control the running frequency fortune after compressor is processed according to limit frequency OK.Certainly, if without temperature limit frequency, also without Current Voltage limit frequency, then controlling compressor directly according to initial launch frequency Or revised running frequency operation.

That is, the process of the initial launch frequency operation calculated according to fuzzy control rule in control compressor In, or, during the revised running frequency that control compressor is calculated according to pid control algorithm is run, increase Plus delivery temperature limit frequency, evaporator temperature limit frequency, voltage limit frequency and electric current limit frequency.In addition, compressor can compress for three phase variable frequency There is maximum frequency of operation in machine, three phase variable frequency compressor, and the actual motion frequency of air-conditioner is carried no more than compressor producer For maximum frequency of operation.

Specifically, in one embodiment of the invention, as shown in figure 4, in control compressor according to initial launch frequency Or specifically include following steps before revised running frequency operation：

S101：Judge whether to meet high frequency entry condition.If it is, execution step S102；If it is not, then execution step S103。

S102：High frequency active flag set.Say, the Starting mode of compressor is exactly high frequency Starting mode, is opened with high frequency Dynamic mode controls the running frequency of compressor, execution step S104.

S103：Normal active flag set.Say, the Starting mode of compressor is exactly normal Starting mode, normally to open Dynamic mode controls the running frequency of compressor.

S104：Judge whether to meet temperature limit frequency.If it is, execution step S105；If it is not, then execution step S106。

S105：Temperature is called to limit sound interval sequence so that initial launch frequency is reduced, control compressor is according to through temperature limit frequency Running frequency operation after process.

S106：Judge whether to meet voltage x current limit frequency.If it is, execution step S107；If it is not, then, terminate, and Judged result according to step S104 and step S101 controls compressor operating.

S107：Voltage x current is called to limit sound interval sequence so that initial launch frequency is reduced, control compressor is according to through voltage Running frequency after electric current limit frequency is processed is run.

Generally speaking, in embodiments of the present invention, temperature TS for being set according to indoor temperature T1 and user calculates Indoor Temperature Difference DELTA T between degree and the temperature of user's setting, is first according to difference DELTA T and fuzzy control rule in combination with needed by human body Comfortableness calculate initial launch frequency, air-conditioner start after normal work when, compressor is just with initial launch frequency Operation, such as, in n-th initial controlling cycle, outdoor controller 2 just controls compressor 1 with initial launch frequency f0 (n) fortune OK.Meanwhile, will determine whether to meet high frequency entry condition before compressor operating, if eligible, then just with height The mode that frequency starts runs to initial launch frequency, such as, in n-th initial controlling cycle, outdoor controller 2 just controls pressure Contracting machine 1 runs to initial launch frequency f0 (n) in the way of high frequency startup, then judges whether to meet temperature limit frequency and/or electricity Piezoelectricity ductility limit frequency, if eligible, then just enter trip temperature limit frequency to initial launch frequency and/or voltage x current limit frequency is processed Run according to the running frequency after process with controlling compressor.After compressor continuously runs Preset Time, indoor temperature is judged And whether the absolute value of difference DELTA T between the temperature of user's setting is less than or equal to predetermined threshold value M, if it is, using temperature Pid control algorithm calculates the correction value of the running frequency of compressor, and calculated running frequency correction value is superimposed upon into pressure In the initial launch frequency of contracting machine, further determine whether to meet temperature limit frequency and/or voltage x current limit frequency, if meeting bar Part, then just revised running frequency is entered trip temperature limit frequency and/or voltage x current limit frequency process with control compressor according to Running frequency operation after process.Because pid control algorithm is in the ratio (P) in temperature gap Δ T, integration (I) and differential (D) it is controlled, frequency can be thus better achieved and changes with the change of load, so as to can also reaches fast-refrigerating system The effect of heat, lifts the energy-saving effect of air-conditioning, while can also accurately control temperature so that indoor temperature and user's setting Difference between temperature is controlled within 0.1 degree Celsius.

Thus, the running frequency of compressor is controlled by above-mentioned control method, it becomes possible to according to current output energy The relation of power and indoor load, precisely smoothly by the running frequency control of compressor in a suitable running frequency, while In compressor start, start as a result of high frequency such that it is able to promptly increase to the running frequency of compressor initially Running frequency, improves the cooling and warming speed and cooling or heating effect of air-conditioning, further, when being switched by control method for frequency During to temperature PID control method, the adjustment effect of its pid control algorithm is also caused between the temperature of indoor temperature and user's setting Difference control within 0.1 degree Celsius.Above-mentioned control method is adopted simultaneously, air-conditioning is frequently started, so as to With certain energy-saving effect.

To sum up, the control method of the air-conditioner for proposing according to embodiments of the present invention, by detecting indoor temperature, according to interior Difference DELTA T between the temperature of the temperature computation indoor temperature and user's setting of temperature and user's setting, and according to difference DELTA T and Default fuzzy control rule calculates the initial launch frequency increment of the compressor of air-conditioner, and according to the initial launch of compressor Frequency increment calculates the initial launch frequency of compressor and is run according to initial launch frequency with controlling compressor, while by detection The run time of compressor, when the run time of compressor is more than or equal to Preset Time, if the absolute value of difference DELTA T is less than Equal to predetermined threshold value, then the running frequency correction value of compressor is calculated according to difference DELTA T and the PID control model for pre-building, And by the running frequency correction value of compressor be added to compressor initial launch frequency to control compressor according to revised Running frequency is run.Thus, the control method is controlled with reference to fuzzy control and PID control to the running frequency of compressor, The change of the running frequency quick response load of compressor can be realized, the effect that fast-refrigerating is heated is reached, while also can Temperature is accurately controlled, can the effectively save energy, improve user comfortableness.

Fig. 6 is the block diagram of the control device of the air-conditioner according to the embodiment of the present invention.As shown in fig. 6, the air-conditioning The control device of device includes：The control of compressor 1, outdoor controller 2, the first temperature-detecting device 3, timer 4 and indoor set Device 5.

Wherein, outdoor controller 2 runs for controlling compressor 1.First temperature-detecting device 3 is used to detect Indoor Temperature Degree；Timer 4 is used to detect the run time of compressor；Indoor machine controller 5 is communicated with outdoor controller 2, indoor Machine controller 5 is connected respectively with the first temperature-detecting device 3 and timer 4, and indoor machine controller 5 is used for according to indoor temperature TS And temperature T1 of user's setting calculates difference DELTA T between the temperature of indoor temperature and user's setting, and according to difference DELTA T and in advance If fuzzy control rule calculate air-conditioner compressor initial launch frequency increment, and according to the initial launch of compressor frequency The initial launch frequency of rate incremental computations compressor is so that outdoor controller 2 controls compressor 1 and transports according to initial launch frequency OK, when the run time of compressor is more than or equal to Preset Time, if the absolute value of difference DELTA T is less than or equal to predetermined threshold value, Then indoor machine controller 5 calculates the running frequency correction value of compressor according to difference DELTA T and the PID control model for pre-building, And by the running frequency correction value of compressor be added to compressor initial launch frequency so that outdoor controller 2 control compression Machine 1 runs according to revised running frequency.

That is, when air-conditioner initial power-on, the first temperature-detecting device 3 starts to detect indoor temperature T1, indoor Machine controller 5 obtains indoor temperature T1 that the first temperature-detecting device 3 is detected, and can obtain temperature TS and use of user's setting The operational mode of family setting, and temperature TS of indoor temperature T1 and user's setting is calculated according to indoor temperature T1 and design temperature TS Between difference DELTA T, for example, Δ T=TS-T1.Afterwards, indoor machine controller 5 is first according to difference DELTA T and default Fuzzy Control System rule obtains the initial launch frequency of the compressor under the outer working condition of current indoor, wherein, fuzzy control rule can basis The comfortableness design of human body, specifically, when air-conditioner initial power-on, indoor machine controller 5 can be according to current indoor environment Difference DELTA T (n) and current difference DELTA T (n) between temperature T1 (n) and temperature TS of user's setting is once current with front Difference DELTA T (n-1), and inquire about the increasing of the current initial launch frequency that the corresponding fuzzy control rule table of present mode of operation draws Amount Δ f0 (n), further, according to increment Delta f0 (n) and front initial launch frequency f0 (n- of current initial launch frequency 1) current initial launch frequency f0 (n) is obtained, i.e. the computational methods of initial launch frequency are：F0 (n)=f0 (n-1)+Δ f0 (n), wherein, n is positive integer, and n represents that n-th initial controlling cycle, i.e. initial launch frequency f0 (n) initially control week at each Phase carries out an iteration renewal, and f0 (0) is initial frequency value, can according to circumstances be set.So, it is normal after air-conditioner is started shooting During work, every an initial controlling cycle, indoor machine controller 5 sets with regard to indoor environment temperature T1 of acquisition and user Temperature TS, so, when into each initial controlling cycle, indoor machine controller 5 can calculate an initial launch frequency Afterwards, further, indoor machine controller 5 sends initial launch frequency to outdoor controller 2, and outdoor controller 2 is controlled Compressor 1 runs according to the initial launch frequency for calculating, for example, when into n-th controlling cycle, indoor machine controller 5 Initial launch frequency f0 (n) can be calculated, outdoor controller 2 controls compressor 1 and transports according to initial launch frequency f0 (n) OK.

After the stable operation Preset Time of compressor 1 such as 5 minutes, compressor 1 just belongs to stable operation, afterwards, room Interior machine controller 5 by with default control intermittent scanning indoor temperature T1 and calculate indoor temperature T1 and user setting temperature TS it Between difference DELTA T, for example, the default control cycle can be Millisecond, that is, say, indoor machine controller 5 can be with the default control of Millisecond Computation of Period difference DELTA T processed.Specifically, when the running frequency of compressor has reached stable operation, indoor set control Device 5 calculates difference DELTA T every a default control cycle, afterwards, judge the absolute value of difference DELTA T whether less than etc. In predetermined threshold value M, if the absolute value of difference DELTA T is more than predetermined threshold value M, indoor machine controller 5 is not to initial launch frequency Rate is modified, and outdoor controller 2 still controls compressor 1 and runs according to initial launch frequency, is now n-th for example During initial controlling cycle, outdoor controller 2 controls compression and runs according to initial launch frequency f0 (n)；If difference DELTA T Absolute value be less than or equal to predetermined threshold value M, then indoor machine controller 5 converts the control method for frequency of the compressor for adopting before For temperature PID control method, in other words, control what compressor was calculated according to fuzzy control rule in outdoor controller 2 During initial launch frequency is run, i.e., during being controlled to compressor 1 using control method for frequency, if met The condition of | T1-TS |≤M, then switch to be controlled compressor 1 using temperature PID control method automatically.Entering temperature PID After control, indoor machine controller 5 calculates first the operation frequency of compressor according to difference DELTA T and the PID control model for pre-building Rate correction value, and calculated running frequency correction value is superimposed upon in the initial launch frequency of compressor, you can repaiied Running frequency after just, and revised running frequency is sent to outdoor controller 2, the control compression of outdoor controller 2 Machine 1 runs according to revised running frequency.For example, in n-th initial controlling cycle, turned by the control method for frequency of compressor Temperature PID control method is turned to, then initial launch frequency is f0 (n), running frequency correction value can be superimposed upon initial launch frequency In rate f0 (n).

Thus, the running frequency of compressor is controlled by above-mentioned control method, the compressor of air-conditioner just can It is precisely smoothly that the running frequency control of compressor is suitable at one according to current fan-out capability and the relation of indoor load Running frequency, and when temperature PID control method is switched to by control method for frequency, the adjustment effect of its pid control algorithm So that the difference between indoor temperature and the temperature of user's setting is controlled within 0.1 degree Celsius.

In a specific example of the present invention, temperature TS of the receive users such as remote control, control panel setting can be passed through And operational mode.It is understood that air-conditioner may include plurality of operating modes, and for example, refrigeration mode, heating mode, dehumidifying Pattern etc., wherein, every kind of operational mode can correspond to a fuzzy control rule table.Each fuzzy control rule table can be pre-stored in room In interior machine controller 5.

In addition, in embodiments of the present invention, indoor machine controller 5 can receive remote control etc. and connect by certain communication protocol Receive temperature TS and operational mode of user's setting.Indoor machine controller 5 and outdoor controller 2 also can be by certain communication protocols View carries out data exchange, and indoors machine controller 5 is calculated after initial launch frequency or revised running frequency, indoor set control Device processed 5 sends initial launch frequency or revised running frequency to outdoor controller 2, the control pressure of outdoor controller 2 Contracting machine 1 is according to the running frequency operation for receiving.

Specifically, in one embodiment of the invention, indoor machine controller 5 can calculate compressor according to below equation Running frequency correction value：

f₁(k)=f₁(k-1)+[(K_P+K_I+K_D)ΔT(k)-(K_P+2K_D)ΔT(k-1)+K_DΔT(k-2)]

Specifically, temperature TS of user's setting can be target temperature, indoor temperature T1 can as feedback temperature, by This may make up a temperature PID control system, wherein, the input quantity of indoor machine controller 5 of pid control algorithm is adopted for use Difference DELTA T between temperature TS and indoor temperature T1 of family setting, while defeated using the indoor machine controller 5 of pid control algorithm The controlled quentity controlled variable for going out is the running frequency correction value of compressor.

It should be noted that pid control algorithm is combined by proportional component, integral element and differentiation element.Wherein, ratio The temperature deviation that link is used between temperature TS and indoor temperature T1 for proportionally reacting user's setting, i.e. difference DELTA T (t), Once producing, controller produces immediately control action to reduce deviation deviation；Integral element is mainly used in eliminating steady-state error i.e. Temperature static difference, so as to improve temperature control precision；Differentiation element is capable of the change that the rate of change of stock dividends signal is temperature Rate, and an effective early stage revise signal can be introduced before deviation becomes too big, so as to accelerate the control speed of system, Reduce regulating time.

Specifically, indoor machine controller 5 can adopt positional PID control calculation to calculate the running frequency amendment of compressor Value, i.e.,：

Wherein, f₁(k) for k moment compressors running frequency correction value, K_PFor PID control proportionality coefficient, K_IFor PID controls Integral coefficient processed, K_DFor PID control differential coefficient, Δ T (k) is the temperature that k moment calculated indoor temperature and user set Difference between degree, the difference between the temperature that Δ T (k-1) sets for k-1 moment calculated indoor temperature and user, Δ Difference between the temperature that T (j) sets for j moment calculated indoor temperature and user, u₀For initial value, can set in advance Fixed, such as u0 can be 0.

Further, from formula (1), f₁K () is relevant with difference DELTA T at past each moment, right during calculating The Δ T at each moment is added up, and operand is larger, therefore, it can be converted to the positional PID control calculation of formula (1) Incremental timestamp algorithm, i.e.,：

Further abbreviation is carried out to formula (2), you can obtain：

Δf₁(k)=(K_P+K_I+K_D)ΔT(k)-(K_P+2K_D)ΔT(k-1)+K_DΔT(k-2) (3)

Δf₁(k)=q₀ΔT(k)+q₁ΔT(k-1)+q₂ΔT(k-2) (4)

Further it will be understood that the increment of the simply controlled quentity controlled variable obtained using incremental timestamp algorithm, that is, compressed Increment Delta f of the running frequency correction value of machine₁(k).Say, when using incremental timestamp algorithm, indoor machine controller 5 By it is calculated be running frequency correction value increment Delta f₁(k), increment Delta f₁K it is this executing agency position that () is corresponding The increment put, rather than the physical location of correspondence executing agency, therefore, executing agency must have the increment to controlled quentity controlled variable to tire out Long-pending function, can just complete the control operation to controlled device, or software may also be employed realizing the increment to controlled quentity controlled variable Accumulation, for example, indoor machine controller 5 can utilize below equation f₁(k)=f₁(k-1)+Δf₁The sequencing of (k) come complete to control The accumulation of the increment of amount processed.

Thus, according to incremental timestamp algorithm, the recurrence formula of positional PID control calculation can be obtained, that is, is sayed, In one embodiment of the present of invention, indoor machine controller 5 can calculate the running frequency correction value of compressor according to below equation：

f₁(k)=f₁(k-1)+q₀ΔT(k)+q₁ΔT(k-1)+q₂ΔT(k-1)

Thus, according to formula (5), when using the positional PID control calculation obtained according to incremental timestamp algorithm Recurrence formula is the running frequency that the indoor machine controller 5 of the embodiment of the present invention calculates compressor using temperature PID control algorithm Correction value f₁K when (), in each step is calculated, indoor machine controller 5 need to store the operation frequency once exported before PID controller Rate correction value f₁(k-1) and front difference DELTA T (k-1) for obtaining twice and Δ T (k-2), you can calculate the operation frequency of compressor Rate correction value f₁K (), amount of calculation is less.

When temperature TS or indoor temperature T1 of user's setting change, because indoor machine controller 5 is using according to increment type The recurrence formula of the positional PID control calculation that pid control algorithm is obtained, then the response that indoor machine controller 5 will be quickly Temperature TS of user's setting or the change of indoor temperature T1 are exporting running frequency correction value f₁(k), so as to by operation frequency Rate correction value is added to initial launch frequency, obtains revised running frequency, i.e. f₁(k)+f0 (n), and by revised fortune Line frequency is sent to outdoor controller 2, and outdoor controller 2 will control compressor 1 with the continuation of revised running frequency Operation so that indoor temperature T1 rapidly follows and reach temperature TS of user's setting.

In other words, indoors the control algolithm of machine controller 5 is converted into after temperature PID control, the running frequency of compressor Simple amendment is exactly carried out on the basis of initial launch frequency, that is to say, that the running frequency of compressor will be with The controlled quentity controlled variable exported using the indoor machine controller 5 of temperature PID control algorithm is modified.

In a specific example of the present invention, the indoor set control of the employing temperature PID control algorithm of the embodiment of the present invention The regulating cycle of device processed 5 can be 60S, that is to say, that indoors the control algolithm of machine controller 5 is converted into using temperature PID control After algorithm processed, indoor machine controller 5 can be adjusted once every 60S, generate a new running frequency correction value.

That is, indoor machine controller 5 needs the running frequency correction value to obtaining using incremental timestamp algorithm Increment Delta f₁K () carries out amplitude limiting processing, by increment Delta f₁K () is limited in the second predetermined threshold value-Um and the first predetermined threshold value+Um Between.Say, when increment Delta f₁K () is more than the first predetermined threshold value, indoor machine controller 5 can be by increment Delta f₁K () amplitude limit is+Um； When increment Delta f₁K () is less than the second predetermined threshold value, indoor machine controller 5 can be by increment Delta f₁K () amplitude limit is-Um.

In one embodiment of the invention, as shown in fig. 7, the control device of air-conditioner also includes：Voltage detection module 6 With second temperature detection module 7.Voltage detection module 6 and second temperature detection module 7 are connected with outdoor controller 2, electricity Pressure detection module 6 is used to detect the input voltage of whole machine；Second temperature detection module 7 is used to detect outdoor temperature, wherein, it is outdoor Whether machine controller 2 is additionally operable to judge the input voltage of whole machine more than first voltage threshold value and whether outdoor temperature is less than or equal to Preset temperature threshold value, if the input voltage of whole machine is more than first voltage threshold value and outdoor temperature is less than or equal to preset temperature threshold It is worth, then the running frequency of the control of outdoor controller 2 compressor is run to initial launch frequency with high frequency Starting mode.

When air-conditioner just starts, before the control compressor 1 of outdoor controller 2 is according to the operation of initial launch frequency, Outdoor controller 2 will determine whether to meet high frequency entry condition, and high frequency entry condition is the input voltage of whole machine and is more than First voltage threshold value and outdoor temperature are less than or equal to preset temperature threshold value.If meeting high frequency entry condition, high frequency starts Flag set, the Starting mode of compressor is exactly high frequency Starting mode, i.e., the operation of compressor is controlled in the way of high frequency startup Frequency reaches initial launch frequency, wherein, the mode that high frequency starts is exactly that the running frequency for making compressor promptly increases to just Beginning running frequency.If not meeting high frequency entry condition, i.e., the input voltage of whole machine is less than or equal to first voltage threshold value or outdoor Temperature be more than preset temperature threshold value, then normal active flag set, the Starting mode of compressor is exactly normal Starting mode, i.e., with The running frequency that the normal mode for starting controls compressor reaches initial launch frequency, wherein, the normal mode for starting is exactly to make The running frequency of compressor increases to initial launch frequency with normal speed.

Further, in one embodiment of the invention, as shown in fig. 7, the control device of air-conditioner also includes：3rd Temperature-detecting device 8, the 4th temperature-detecting device 9 and current sensing means 10.3rd temperature-detecting device 8 is controlled with indoor set Device 5 is connected, and the 4th temperature-detecting device 9 and current sensing means 10 are connected with outdoor controller 2, the 3rd temperature detection dress Putting 8 is used to detect the delivery temperature of compressor；4th temperature-detecting device 9 is used to detect the evaporator temperature of compressor, electric current Detection means 10 is used to detect whole machine input current；Wherein, if delivery temperature is more than the first temperature threshold or evaporimeter temperature Degree is more than second temperature threshold value, then outdoor controller 2 enters trip temperature limit frequency to the initial launch frequency of compressor and processes to control Compressor processed limits the running frequency operation after frequency is processed according to temperature, if the input voltage of whole machine more than second voltage threshold value or The whole machine input current of person is more than current threshold, then outdoor controller 2 carries out voltage x current to the initial launch frequency of compressor Limit frequency processes and the running frequency operation after frequency is processed is limited according to voltage x current to control compressor.

That is, outdoor controller 2 is controlling compressor according to initial launch frequency or revised running frequency Before operation, temperature limit frequency and/or Current Voltage limit frequency can be then determined whether, if temperature limit frequency, i.e. delivery temperature It is more than second temperature threshold value more than the first temperature threshold or evaporator temperature, then temperature limit frequency flag set, off-premises station control Device 2 calls temperature to limit sound interval sequence so that initial launch frequency or revised running frequency are reduced；If voltage x current limit Frequently, i.e., the input voltage of whole machine is more than current threshold more than second voltage threshold value or whole machine input current, then voltage x current limit Frequency flag set, outdoor controller 2 calls voltage x current to limit sound interval sequence so that initial launch frequency or revised operation frequency Rate is reduced.So, after have passed through temperature limit frequency and/or Current Voltage limit frequency, the initial launch frequency of compressor will be updated, and enter And the running frequency after the control compressor 1 of outdoor controller 2 is processed according to limit frequency is run.Certainly, if limiting frequency without temperature, Also without Current Voltage limit frequency, then the control of outdoor controller 2 compressor 1 directly runs according to initial launch frequency.

That is, controlling the initial launch that compressor 1 is calculated according to fuzzy control rule in outdoor controller 2 During frequency is run, or, control compressor and run according to the revised running frequency that pid control algorithm is calculated During, increase delivery temperature limit frequency, evaporator temperature limit frequency, voltage limit frequency and electric current limit frequency.Indoor controller 5 can be obtained Indoor environment temperature and delivery temperature, outdoor controller 2 can obtain the input electricity of outdoor environment temperature, evaporator temperature, whole machine Pressure, the input voltage of whole machine and whole machine input current.In addition, compressor 1 can be three phase variable frequency compressor, three phase variable frequency compressor There is maximum frequency of operation, and the actual motion frequency of air-conditioner is no more than the maximum frequency of operation that compressor producer provides.

Generally speaking, in embodiments of the present invention, the temperature that indoors machine controller 5 sets according to indoor temperature T1 and user Degree TS is calculated after difference DELTA T between the temperature of indoor temperature and user's setting, and indoor machine controller 5 is first according to difference DELTA T Initial launch frequency is calculated in combination with the comfortableness of needed by human body with fuzzy control rule, and initial launch frequency is sent out Outdoor controller 2 is delivered to, in normal work after air-conditioner start, outdoor controller 2 just controls compressor 1 initially to transport Line frequency is run, such as, in n-th initial controlling cycle, outdoor controller 2 just controls compressor 1 with initial launch frequency f0 N () is run.Meanwhile, before compressor 1 runs, outdoor controller 2 will determine whether to meet high frequency entry condition, if It is eligible, then the control of outdoor controller 2 compressor 1 just runs to initial launch frequency, example in the way of high frequency startup Such as in n-th initial controlling cycle, outdoor controller 2 is just controlled compressor 1 and initial fortune is run in the way of high frequency startup Line frequency f0 (n), then judges whether to meet temperature limit frequency and/or voltage x current limit frequency, if eligible, then off-premises station Controller 2 just enters trip temperature limit frequency to initial launch frequency and/or voltage x current limit frequency is processed to control compressor 1 according to process Running frequency operation afterwards.After compressor 1 continuously operation Preset Time, indoor machine controller 5 judges indoor temperature and user Whether the absolute value of difference DELTA T between the temperature of setting is less than or equal to predetermined threshold value M, if it is, indoor machine controller 5 is adopted The correction value of the running frequency of compressor is calculated with temperature PID control algorithm, and calculated running frequency correction value is folded It is added in the initial launch frequency of compressor, outdoor controller 2 further determines whether to meet temperature limit frequency and/or voltage electricity Ductility limit frequency, if eligible, then just enter trip temperature limit frequency to revised running frequency and/or voltage x current limit frequency is processed Run according to the running frequency after process with controlling compressor.Because pid control algorithm is in the ratio in temperature gap Δ T (P), integrate (I) and differential (D) is controlled, frequency can be thus better achieved and changes with the change of load, so as to Also the effect that fast-refrigerating is heated can be reached, the energy-saving effect of air-conditioning is lifted, while can also accurately control temperature so that room Difference between interior temperature and the temperature of user's setting is controlled within 0.1 degree Celsius.

Thus, the running frequency of compressor is controlled by above-mentioned control device, it becomes possible to according to current output energy The relation of power and indoor load, precisely smoothly by the running frequency control of compressor in a suitable running frequency, while When compressor 1 starts, start as a result of high frequency such that it is able to promptly increase to the running frequency of compressor initially Running frequency, improves the cooling and warming speed and cooling or heating effect of air-conditioning, further, when being switched by control method for frequency During to temperature PID control method, the adjustment effect of its PID control method is also caused between the temperature of indoor temperature and user's setting Difference control within 0.1 degree Celsius.Above-mentioned control device is adopted simultaneously, air-conditioning is frequently started, so as to With certain energy-saving effect.

To sum up, the control device of the air-conditioner for proposing according to embodiments of the present invention, is detected by the first temperature-detecting device Indoor temperature, temperature computation indoor temperature and the temperature of user's setting that indoor machine controller sets according to indoor temperature and user Between difference DELTA T, and the initial launch frequency of the compressor of air-conditioner is calculated according to difference DELTA T and default fuzzy control rule Rate increment, and the initial launch frequency of compressor is calculated so that outdoor controller according to the initial launch frequency increment of compressor Control compressor runs according to initial launch frequency, while the run time of compressor is detected by timer, when compressor When run time is more than or equal to Preset Time, if the absolute value of difference DELTA T is less than or equal to predetermined threshold value, indoor machine controller The running frequency correction value of compressor is calculated according to difference DELTA T and the PID control model that pre-builds, and by the operation of compressor Frequency correction value be added to compressor initial launch frequency so that outdoor controller control compressor according to revised fortune Line frequency is run.Thus, operation frequency of the method that fuzzy control and PID control combine to compressor is adopted in the control device Rate is controlled, and can realize the change of the running frequency quick response load of compressor, reaches the effect that fast-refrigerating is heated, Also temperature can be accurately controlled simultaneously, can the effectively save energy, improve the comfortableness of user.

In flow chart or here any process described otherwise above or method description are construed as, expression includes It is one or more for realizing specific logical function or process the step of the module of code of executable instruction, fragment or portion Point, and the scope of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discussion suitable Sequence, including according to involved function by it is basic simultaneously in the way of or in the opposite order, carry out perform function, this should be of the invention Embodiment person of ordinary skill in the field understood.

In flow charts expression or here logic described otherwise above and/or step, for example, are considered use In the order list of the executable instruction for realizing logic function, in may be embodied in any computer-readable medium, for Instruction execution system, device or equipment (as computer based system, the system including processor or other can hold from instruction The system of row system, device or equipment instruction fetch and execute instruction) use, or with reference to these instruction execution systems, device or set It is standby and use.For the purpose of this specification, " computer-readable medium " can any can be included, store, communicate, propagate or pass The dress that defeated program is used for instruction execution system, device or equipment or with reference to these instruction execution systems, device or equipment Put.The more specifically example (non-exhaustive list) of computer-readable medium includes following：With the electricity that one or more are connected up Connecting portion (electronic installation), portable computer diskette box (magnetic device), random access memory (RAM), read-only storage (ROM), erasable edit read-only storage (EPROM or flash memory), fiber device, and portable optic disk is read-only deposits Reservoir (CDROM).In addition, computer-readable medium can even is that the paper that can thereon print described program or other are suitable Medium, because for example by carrying out optical scanner to paper or other media edlin, interpretation can then be entered or if necessary with it His suitable method is processed to electronically obtain described program, in being then stored in computer storage.

It should be appreciated that each several part of the present invention can be realized with hardware, software, firmware or combinations thereof.Above-mentioned In embodiment, the software that multiple steps or method can in memory and by suitable instruction execution system be performed with storage Or firmware is realizing.For example, if realized with hardware, and in another embodiment, can be with well known in the art Any one of row technology or their combination are realizing：With for realizing the logic gates of logic function to data-signal Discrete logic, the special IC with suitable combinational logic gate circuit, programmable gate array (PGA), scene Programmable gate array (FPGA) etc..

Those skilled in the art are appreciated that to realize all or part of step that above-described embodiment method is carried Suddenly the hardware that can be by program to instruct correlation is completed, and described program can be stored in a kind of computer-readable storage medium In matter, the program upon execution, including one or a combination set of the step of embodiment of the method.

Additionally, each functional unit in each embodiment of the invention can be integrated in a processing module, it is also possible to It is that unit is individually physically present, it is also possible to which two or more units are integrated in a module.Above-mentioned integrated mould Block both can be realized in the form of hardware, it would however also be possible to employ the form of software function module is realized.The integrated module is such as Fruit is realized and as independent production marketing or when using using in the form of software function module, it is also possible to be stored in a computer In read/write memory medium.

Storage medium mentioned above can be read-only storage, disk or CD etc..

In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means to combine specific features, structure, material or spy that the embodiment or example are described Point is contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not Necessarily refer to identical embodiment or example.And, the specific features of description, structure, material or feature can be any One or more embodiments or example in combine in an appropriate manner.

Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with Understanding can carry out various changes, modification, replacement to these embodiments without departing from the principles and spirit of the present invention And modification, the scope of the present invention is by claims and its is equal to limit.

Claims

1. a kind of control method of air-conditioner, it is characterised in that comprise the following steps：

Detection indoor temperature；

According to the temperature computation that the indoor temperature and user set between indoor temperature and the temperature of user setting Difference DELTA T；

The initial launch frequency that the compressor of the air-conditioner is calculated according to difference DELTA T and default fuzzy control rule increases Amount, and the initial launch frequency of the compressor is calculated to control the pressure according to the initial launch frequency increment of the compressor Contracting machine runs according to the initial launch frequency；

Detect the run time of the compressor；

When the run time of the compressor is more than or equal to Preset Time, if the absolute value of difference DELTA T is less than or equal to Predetermined threshold value, then calculate the running frequency amendment of the compressor according to difference DELTA T and the PID control model for pre-building Value, and by the running frequency correction value of the compressor be added to the compressor initial launch frequency to control the compression Machine runs according to revised running frequency；

Wherein, also included before the compressor is controlled according to initial launch frequency operation：

Detect the input voltage of whole machine；

Detection outdoor temperature；

Judge the input voltage of the whole machine whether more than first voltage threshold value and whether the outdoor temperature is less than or equal to pre- If temperature threshold；

If the input voltage of the whole machine is more than the first voltage threshold value and the outdoor temperature is less than or equal to described pre- If temperature threshold, then the running frequency for controlling the compressor is run to the initial launch frequency with high frequency Starting mode.

2. the control method of air-conditioner as claimed in claim 1, it is characterised in that controlling the compressor according to initial fortune Also include before line frequency is run or the revised running frequency is run：

Detect delivery temperature, evaporator temperature, the input voltage of whole machine and the whole machine input current of the compressor；

If the delivery temperature is more than second temperature threshold value more than the first temperature threshold or the evaporator temperature, to institute The initial launch frequency or the revised running frequency for stating compressor enters trip temperature limit frequency process to control the compressor The running frequency operation after frequency is processed is limited according to temperature；

If the input voltage of the whole machine is more than current threshold more than second voltage threshold value or the whole machine input current, Initial launch frequency or the revised running frequency to the compressor carries out voltage x current limit frequency and processes to control State compressor and the running frequency operation after frequency is processed is limited according to the voltage x current.

3. the control method of air-conditioner as claimed in claim 1, it is characterised in that the compressor is calculated according to below equation Running frequency correction value：

f₁(k)=f₁(k-1)+[(K_P+K_I+K_D)ΔT(k)-(K_P+2K_D)ΔT(k-1)+K_DΔT(k-2)]

Wherein, f₁(k) for compressor described in the k moment running frequency correction value, f₁(k-1) it is the fortune of compressor described in the k-1 moment Line frequency correction value, K_PFor PID control proportionality coefficient, K_IFor PID control integral coefficient, K_DFor PID control differential coefficient, Δ T K () is the difference between the temperature that the k moment calculated indoor temperature and the user set, Δ T (k-1) is k-1 Difference between the moment calculated indoor temperature and the temperature of user setting, Δ T (k-2) is counted for the k-2 moment Difference between the indoor temperature for obtaining and the temperature of user setting.

4. the control method of air-conditioner as claimed in claim 3, it is characterised in that wherein, the running frequency correction value Increment Delta f₁(k)=(K_P+K_I+K_D)ΔT(k)-(K_P+2K_D)ΔT(k-1)+K_DΔ T (k-2), if increment Delta f₁K () is big In the first predetermined threshold value or less than the second predetermined threshold value, then to increment Delta f₁K () carries out amplitude limiting processing to control the pressure Contracting machine runs according to the running frequency after amplitude limiting processing, wherein, first predetermined threshold value is more than second predetermined threshold value.

5. a kind of control device of air-conditioner, it is characterised in that include：

Outdoor controller, for controlling compressor operating；

First temperature-detecting device, for detecting indoor temperature；

Timer, for detecting the run time of the compressor；

Indoor machine controller, the indoor machine controller is communicated with the outdoor controller, the indoor machine controller Between the temperature set for indoor temperature and the user according to the temperature computation that the indoor temperature and user set Difference DELTA T, and the initial fortune of the compressor of the air-conditioner is calculated according to difference DELTA T and default fuzzy control rule Line frequency increment, and according to the initial launch frequency increment of the compressor calculate the compressor initial launch frequency so that The outdoor controller controls the compressor and runs according to the initial launch frequency, when the run time of the compressor During more than or equal to Preset Time, if the absolute value of difference DELTA T is less than or equal to predetermined threshold value, the indoor machine controller The running frequency correction value of the compressor is calculated according to difference DELTA T and the PID control model for pre-building, and will be described The running frequency correction value of compressor be added to the compressor initial launch frequency so that the outdoor controller control The compressor runs according to revised running frequency；

Wherein, the control device of described air-conditioner also includes：

Voltage detection module, for detecting the input voltage of whole machine；

Second temperature detection module, for detecting outdoor temperature；

Wherein, the outdoor controller is additionally operable to judge whether the input voltage of the whole machine is more than first voltage threshold value and institute Outdoor temperature is stated whether less than or equal to preset temperature threshold value, if the input voltage of the whole machine is more than the first voltage threshold It is worth and the outdoor temperature is less than or equal to the preset temperature threshold value, then the outdoor controller controls the compressor Running frequency is run to the initial launch frequency with high frequency Starting mode.

6. the control device of air-conditioner as claimed in claim 5, it is characterised in that also include：

3rd temperature-detecting device, for detecting the delivery temperature of the compressor；

4th temperature-detecting device, for detecting evaporator temperature；Current sensing means, for detecting whole machine input current；

Wherein, if the delivery temperature is more than second temperature threshold value more than the first temperature threshold or the evaporator temperature, Then the outdoor controller enters trip temperature limit to the initial launch frequency or the revised running frequency of the compressor Frequency is processed and limits the running frequency operation after frequency is processed according to temperature to control the compressor, if the input voltage of the whole machine It is more than current threshold more than second voltage threshold value or the whole machine input current, then the outdoor controller is to the compression The initial launch frequency of machine or the revised running frequency carry out voltage x current limit frequency process with control the compressor by The running frequency operation after frequency is processed is limited according to the voltage x current.

7. the control device of air-conditioner as claimed in claim 5, it is characterised in that the indoor machine controller is according to following public affairs Formula calculates the running frequency correction value of the compressor：

f₁(k)=f₁(k-1)+[(K_P+K_I+K_D)ΔT(k)-(K_P+2K_D)ΔT(k-1)+K_DΔT(k-2)]

8. the control device of air-conditioner as claimed in claim 7, it is characterised in that wherein, the running frequency correction value Increment Delta f₁(k)=(K_P+K_I+K_D)ΔT(k)-(K_P+2K_D)ΔT(k-1)+K_DΔ T (k-2), if increment Delta f₁K () is big In the first predetermined threshold value or less than the second predetermined threshold value, then the indoor machine controller is to increment Delta f₁K () carries out amplitude limit Process so that the outdoor controller controls the compressor and runs according to the running frequency after amplitude limiting processing, wherein, it is described First predetermined threshold value is more than second predetermined threshold value.