CN105135618A - Frequency increasing method and system for variable frequency air conditioner - Google Patents
Frequency increasing method and system for variable frequency air conditioner Download PDFInfo
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Abstract
The invention discloses a frequency increasing method and system for a variable frequency air conditioner. The frequency increasing method comprises the steps that the environment temperature of the environment where the variable frequency air conditioner is located and the set temperature set by a user are acquired; whether an absolute value of a difference value between the environment temperature and the set temperature is larger than a temperature threshold value is judged; if yes, the first frequency increasing speed of a compressor is calculated through a fuzzy control algorithm according to the environment temperature and the compressor current, and the operation frequency of the compressor is increased according to the first frequency increasing speed; if not, the operation frequency of the compressor is increased according to the preset second frequency increasing speed; the first frequency increasing speed is higher than or equal to the second frequency increasing speed. According to the frequency increasing method and system, the frequency increasing speed of the compressor can be quickly increased to achieve the purpose of quick refrigerating or heating, and therefore great convenience is brought to a user.
Description
Technical field
The present invention relates to convertible frequency air-conditioner technical field, in particular a kind of raising frequency method and system of convertible frequency air-conditioner.
Background technology
At present on Domestic air conditioning market, convertible frequency air-conditioner is because its effect that is energy-conservation and comfortableness makes the occupation rate of convertible frequency air-conditioner rise gradually, but existing convertible frequency air-conditioner is lower compressor raising frequency speed when compressor start, make frequency-changeable compressor raising frequency longer to the time needed during rated frequency, thus result in convertible frequency air-conditioner start time refrigeration or heating effect poor.
A kind of method that DC frequency-changeable compressor starts generally is used in existing convertible frequency air-conditioner, its when compressor start runs in order to ensure oil return and the noise problem of compressor, the speed that generally have employed fixing 1Hz/s carries out raising frequency, therefore compressor needs the time of about 60 seconds from the 60Hz that the 1Hs started rises to specified operation, time is long, thus make the initial refrigeration of convertible frequency air-conditioner or heating effect poor.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
The technical problem to be solved in the present invention is, provides a kind of raising frequency method and system of convertible frequency air-conditioner, is intended to solve existing convertible frequency air-conditioner raising frequency speed and causes the refrigeration of convertible frequency air-conditioner or the poor problem of heating effect excessively slowly.
The technical scheme that technical solution problem of the present invention adopts is as follows:
A raising frequency method for convertible frequency air-conditioner, wherein, comprising:
The design temperature that A, the environment temperature obtaining environment residing for convertible frequency air-conditioner and user set;
B, judge whether the absolute value of the difference of environment temperature and design temperature is greater than temperature threshold, if yes, then perform step C; If NO, then step D is performed;
C, environmentally temperature and compressor current, adopt FUZZY ALGORITHMS FOR CONTROL to calculate the first raising frequency speed of compressor, promotes the running frequency of compressor according to described first raising frequency speed;
D, promote the running frequency of compressor according to the second raising frequency speed preset; Wherein, described first raising frequency speed is more than or equal to the second raising frequency speed.
The raising frequency method of described convertible frequency air-conditioner, wherein, described step C also comprises: the running frequency promoting compressor according to described first raising frequency speed, when the running frequency of compressor reaches the first default running frequency, stops the running frequency promoting compressor;
Described step D also comprises: the running frequency promoting compressor according to the second raising frequency speed preset, and when the running frequency of compressor reaches the first default running frequency, stops the running frequency promoting compressor.
The raising frequency method of described convertible frequency air-conditioner, wherein, described step C also comprises:
C11, when the running frequency of compressor is lower than the second running frequency, environmentally temperature and compressor current, adopts FUZZY ALGORITHMS FOR CONTROL to calculate the first raising frequency speed of compressor, promotes the running frequency of compressor according to described first raising frequency speed;
C12, when the running frequency of compressor is greater than or equal to the second running frequency and lower than the first running frequency preset, promote the running frequency of compressor according to the 3rd raising frequency speed preset; Wherein, the second running frequency is less than the first running frequency; Described 3rd raising frequency speed is less than or equal to the first raising frequency speed, and described 3rd raising frequency speed is more than or equal to the second raising frequency speed.
The raising frequency method of described convertible frequency air-conditioner, wherein, described step C specifically comprises:
C21, outdoor environment temperature is divided into N number of temperature range from low to high; Compressor current is divided into from small to large between N number of Current Zone; By compressor raising frequency speed from interval to being divided into N number of raising frequency soon slowly; Between each temperature range, Current Zone and raising frequency interval is corresponding in turn to digitlization; According between each temperature range after digitlization, Current Zone and raising frequency interval, form corresponding fuzzy control table; Wherein, N is positive integer;
The environment temperature of environment and the operating current of compressor residing for C22, collection convertible frequency air-conditioner; Computing environment temperature and compressor current and the interval degree of membership with the degree that conforms between Current Zone of corresponding different temperatures;
C23, calculated the first raising frequency speed of compressor by gravity model appoach according to degree of membership and fuzzy control table.
The raising frequency method of described convertible frequency air-conditioner, wherein, described step C21 specifically comprises:
Outdoor environment temperature is divided into { ultralow, lower, low, normal, high, higher, superelevation } totally 7 temperature ranges; Compressor current is divided into { extra small, less, little, normal, greatly, comparatively large, super large } between totally 7 Current Zone; Compressor raising frequency speed is divided into super slowly, more slowly, at a slow speed, positive constant speed, quick, very fast, ultrafast totally 7 raising frequency intervals; Between each temperature range, Current Zone and raising frequency interval is corresponding in turn to and is digitized as {-3 ,-2 ,-1,0,1,2,3}; According between each temperature range after digitlization, Current Zone and raising frequency interval, form corresponding fuzzy control table.
A raising frequency system for convertible frequency air-conditioner, wherein, comprising:
Temperature acquisition module, the design temperature that environment temperature and user for obtaining environment residing for convertible frequency air-conditioner set;
Temperature judge module, for judging whether the absolute value of the difference of environment temperature and design temperature is greater than temperature threshold, if yes, then performs the first raising frequency module; If NO, then the second raising frequency module is performed;
First raising frequency module, for environmentally temperature and compressor current, adopts FUZZY ALGORITHMS FOR CONTROL to calculate the first raising frequency speed of compressor, promotes the running frequency of compressor according to described first raising frequency speed;
Second raising frequency module, for promoting the running frequency of compressor according to the second raising frequency speed preset; Wherein, described first raising frequency speed is more than or equal to the second raising frequency speed.
The raising frequency system of described convertible frequency air-conditioner, wherein, described first raising frequency module, also for promoting the running frequency of compressor according to described first raising frequency speed, when the running frequency of compressor reaches the first default running frequency, stop the running frequency promoting compressor;
Described second raising frequency module, also for promoting the running frequency of compressor according to the second raising frequency speed preset, when the running frequency of compressor reaches the first default running frequency, stops the running frequency promoting compressor.
The raising frequency system of described convertible frequency air-conditioner, wherein, described first raising frequency module comprises:
First raising frequency computing unit, for when the running frequency of compressor is lower than the second running frequency, environmentally temperature and compressor current, adopts FUZZY ALGORITHMS FOR CONTROL to calculate the first raising frequency speed of compressor, promotes the running frequency of compressor according to described first raising frequency speed;
Second raising frequency computing unit, for when the running frequency of compressor is greater than or equal to the second running frequency and lower than the first running frequency preset, promotes the running frequency of compressor according to the 3rd raising frequency speed preset; Wherein, the second running frequency is less than the first running frequency; Described 3rd raising frequency speed is less than or equal to the first raising frequency speed, and described 3rd raising frequency speed is more than or equal to the second raising frequency speed.
The raising frequency system of described convertible frequency air-conditioner, wherein, described first raising frequency module comprises:
Fuzzy control table generation unit, for being divided into N number of temperature range from low to high by outdoor environment temperature; Compressor current is divided into from small to large between N number of Current Zone; By compressor raising frequency speed from interval to being divided into N number of raising frequency soon slowly; Between each temperature range, Current Zone and raising frequency interval is corresponding in turn to digitlization; According between each temperature range after digitlization, Current Zone and raising frequency interval, form corresponding fuzzy control table; Wherein, N is positive integer;
Degree of membership computing unit, for the operating current of the environment temperature and compressor that gather environment residing for convertible frequency air-conditioner; Computing environment temperature and compressor current and the interval degree of membership with the degree that conforms between Current Zone of corresponding different temperatures;
First raising frequency speed computing unit, for calculating the first raising frequency speed of compressor according to degree of membership and fuzzy control table by gravity model appoach.
The raising frequency system of described convertible frequency air-conditioner, wherein, described fuzzy control table generation unit, for being divided into { ultralow, lower, low, normal, high, higher, superelevation } totally 7 temperature ranges by outdoor environment temperature; Compressor current is divided into { extra small, less, little, normal, greatly, comparatively large, super large } between totally 7 Current Zone; Compressor raising frequency speed is divided into super slowly, more slowly, at a slow speed, positive constant speed, quick, very fast, ultrafast totally 7 raising frequency intervals; Between each temperature range, Current Zone and raising frequency interval is corresponding in turn to and is digitized as {-3 ,-2 ,-1,0,1,2,3}; According between each temperature range after digitlization, Current Zone and raising frequency interval, form corresponding fuzzy control table.
The raising frequency method and system of a kind of convertible frequency air-conditioner provided by the present invention, efficiently solve existing convertible frequency air-conditioner raising frequency speed and cause the refrigeration of convertible frequency air-conditioner or the poor problem of heating effect excessively slowly, by the design temperature of the environment temperature and user's setting that obtain environment residing for convertible frequency air-conditioner; Judge whether the absolute value of the difference of environment temperature and design temperature is greater than temperature threshold, if yes, then environmentally temperature and compressor current, adopts FUZZY ALGORITHMS FOR CONTROL to calculate the first raising frequency speed of compressor, promotes the running frequency of compressor according to described first raising frequency speed; If NO, then the running frequency of compressor is promoted according to the second raising frequency speed preset; Wherein, described first raising frequency speed is more than or equal to the second raising frequency speed; The raising frequency speed of compressor can be improved fast, the object reaching fast-refrigerating or heat, also can not cause occurring integrity problem because of quick raising frequency by fuzzy control simultaneously, can not hardware cost be increased, bring to user and facilitate greatly.
Accompanying drawing explanation
Fig. 1 is the flow chart of the raising frequency method preferred embodiment of convertible frequency air-conditioner provided by the invention.
Fig. 2 is the membership schematic diagram of outdoor environment temperature in the raising frequency method of convertible frequency air-conditioner provided by the invention.
Fig. 3 is the membership schematic diagram of compressor current in the raising frequency method of convertible frequency air-conditioner provided by the invention.
Fig. 4 is the membership schematic diagram of compressor raising frequency speed in the raising frequency method of convertible frequency air-conditioner provided by the invention.
Fig. 5 is the structured flowchart of the raising frequency system preferred embodiment of convertible frequency air-conditioner provided by the invention.
Detailed description of the invention
The invention provides a kind of raising frequency method and system of convertible frequency air-conditioner, for making object of the present invention, technical scheme and advantage clearly, clearly, developing simultaneously referring to accompanying drawing, the present invention is described in more detail for embodiment.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Refer to Fig. 1, Fig. 1 is the flow chart of the raising frequency method preferred embodiment of convertible frequency air-conditioner provided by the invention, as shown in the figure, said method comprising the steps of:
The design temperature that step S100, the environment temperature obtaining environment residing for convertible frequency air-conditioner and user set;
Step S200, judge whether the absolute value of the difference of environment temperature and design temperature is greater than temperature threshold, if yes, then perform step S300; If NO, then step S400 is performed;
Step S300, environmentally temperature and compressor current, adopt FUZZY ALGORITHMS FOR CONTROL to calculate the first raising frequency speed of compressor, promotes the running frequency of compressor according to described first raising frequency speed;
Step S400, promote the running frequency of compressor according to the second raising frequency speed preset; Wherein, described first raising frequency speed is more than or equal to the second raising frequency speed.
Below in conjunction with specific embodiment, above-mentioned steps is described in detail.
In the step s 100, start convertible frequency air-conditioner, obtain the environment temperature of environment residing for convertible frequency air-conditioner and the design temperature of user's setting.Specifically, when convertible frequency air-conditioner reaches entry condition, frequency-changeable compressor prepares startup optimization.Being obtained the environment temperature of environment residing for it by convertible frequency air-conditioner, is namely indoor environment temperature, such as obtains by temperature inductor, has multiple obtain manner, does not describe in detail herein.In general, user inputs design temperature by remote controller, thus makes indoor temperature reach the desired value of user.Here have two kinds, one is that user needs refrigeration, and so design temperature can be lower than environment temperature.Another kind is that user needs to heat, and so design temperature can be higher than environment temperature.
In step s 200, judge whether the absolute value of the difference of environment temperature and design temperature is greater than temperature threshold, if yes, then perform step S300; If NO, then step S400 is performed.
Specifically, judge whether to need to enter fast-refrigerating/heating mode by indoor environment temperature and remote controller design temperature; If the absolute value of environment temperature and design temperature difference is greater than temperature threshold △ T, then automatically enter fast-refrigerating/heating mode, then perform step S300; If the absolute value of environment temperature and design temperature difference is less than or equal to temperature threshold △ T, then do not enter fast-refrigerating/heating mode, then perform step S400.
In step S300, environmentally temperature and compressor current, adopts FUZZY ALGORITHMS FOR CONTROL to calculate the first raising frequency speed of compressor, promotes the running frequency of compressor according to described first raising frequency speed.Specifically, fuzzy control method is adopted exactly in fast-refrigerating or heating mode, the size of Based Intelligent Control compressor raising frequency speed is carried out according to the size of outdoor environment temperature and compressor current, quick raising frequency when both having realized cooling and warming has reached the object of fast-refrigerating/heat, suitably reduces again the reliability of operation that compressor lifting frequency speed ensure that compressor when compressor load is excessive.And the collection of compressor current has multiple implementation, do not do too much description herein.
In step S400, promote the running frequency of compressor according to the second raising frequency speed preset.Specifically, be exactly the absolute value of the difference of environment temperature and design temperature when being not more than temperature threshold, so then raising frequency speed conveniently, such as 1Hz/s, promote the running frequency of compressor.
Preferably, when practical application, described first raising frequency speed is more than or equal to the second raising frequency speed.
Certainly when practical application, the running frequency of compressor can not unconfinedly promote, in general, when compressor reaches rated frequency, just no longer raise running frequency, keep this running frequency constant, until when the environment temperature residing for convertible frequency air-conditioner reaches the design temperature of user's setting, then carry out corresponding frequency-conversion processing.Therefore, further, described step S300 also comprises: the running frequency promoting compressor according to described first raising frequency speed, when the running frequency of compressor reaches the first default running frequency, stops the running frequency promoting compressor.
Further, described step S400 also comprises: the running frequency promoting compressor according to the second raising frequency speed preset, and when the running frequency of compressor reaches the first default running frequency, stops the running frequency promoting compressor.Wherein, described first running frequency is generally 60Hz, can adjust according to actual conditions.
Preferably, described step S300 also comprises:
S311, when the running frequency of compressor is lower than the second running frequency, environmentally temperature and compressor current, adopts FUZZY ALGORITHMS FOR CONTROL to calculate the first raising frequency speed of compressor, promotes the running frequency of compressor according to described first raising frequency speed;
S312, when the running frequency of compressor is greater than or equal to the second running frequency and lower than the first running frequency preset, promote the running frequency of compressor according to the 3rd raising frequency speed preset; Wherein, the second running frequency is less than the first running frequency; Described 3rd raising frequency speed is less than or equal to the first raising frequency speed, and described 3rd raising frequency speed is more than or equal to the second raising frequency speed.
Wherein, the second running frequency is less than the first running frequency, specifically can arrange according to actual conditions.That is, first raising frequency speed of the compressor after frequency converting air-conditioner compressor starts is variable, when compressor operating frequency is lower than the second running frequency (such as 40Hz), compressor frequency can carry out raising frequency in the mode more than 1Hz/s, and concrete compressor raising frequency speed is determined in the mode of fuzzy control.
When the frequency of frequency-changeable compressor reaches between the second running frequency and the first running frequency, in order to ensure the problem of compressor noise problem and oil return, the speed of compressor raising frequency can suitably reduce, i.e. the 3rd raising frequency speed, it should be noted that, described 3rd raising frequency speed is less than or equal to the first raising frequency speed, and described 3rd raising frequency speed is more than or equal to the second raising frequency speed.When the frequency of frequency-changeable compressor reaches the first running frequency, then keep this frequency to run, now frequency-changeable compressor reaches rated frequency.
Illustrate as follows, when the frequency of frequency-changeable compressor is lower than the second running frequency, the first raising frequency speed obtained according to Fuzzy Calculation promotes the running frequency of compressor such as 3Hz/s; When the frequency of frequency-changeable compressor reaches between the second running frequency and the first running frequency, promote the running frequency of compressor according to the 3rd raising frequency speed, the 3rd raising frequency speed can be 2Hz/s, also can be normal raising frequency speed, i.e. the second raising frequency speed, such as 1Hz/s.
That is, when practical application, after entering fast-refrigerating heating mode, the time in frequency-changeable compressor start-up course can be shortened by the different raising frequency speed of different frequency section, the speed of 3 ~ 5Hz/s can be used the soonest to carry out raising frequency.And existing convertible frequency air-conditioner is all generally the raising frequency speed of 1Hz/s.Like this, present invention achieves fast-refrigerating and heat object, improve the comfort of user.
About the computational methods of the first raising frequency speed of compressor, further, described step S300 specifically comprises:
S321, outdoor environment temperature is divided into N number of temperature range from low to high; Compressor current is divided into from small to large between N number of Current Zone; By compressor raising frequency speed from interval to being divided into N number of raising frequency soon slowly; Between each temperature range, Current Zone and raising frequency interval is corresponding in turn to digitlization; According between each temperature range after digitlization, Current Zone and raising frequency interval, form corresponding fuzzy control table; Wherein, N is positive integer;
The environment temperature of environment and the operating current of compressor residing for S322, collection convertible frequency air-conditioner; Computing environment temperature and compressor current and the interval degree of membership with the degree that conforms between Current Zone of corresponding different temperatures;
S323, calculated the first raising frequency speed of compressor by gravity model appoach according to degree of membership and fuzzy control table.
Specifically, according to the outdoor environment temperature collected and compressor current, adopt FUZZY ALGORITHMS FOR CONTROL to decide the speed of compressor raising frequency, with N for 7, illustrate as follows: outdoor environment temperature is divided into { ultralow, lower, low, normal, high, higher, superelevation } totally 7 temperature ranges; Compressor current is divided into { extra small, less, little, normal, greatly, comparatively large, super large } between totally 7 Current Zone; Compressor raising frequency speed is divided into super slowly, more slowly, at a slow speed, positive constant speed, quick, very fast, ultrafast totally 7 raising frequency intervals; Between each temperature range, Current Zone and raising frequency interval is corresponding in turn to and is digitized as {-3 ,-2 ,-1,0,1,2,3}; According between each temperature range after digitlization, Current Zone and raising frequency interval, form corresponding fuzzy control table.
Outdoor environment temperature is divided into { ultralow, lower, low, normal, high, higher, superelevation }, because refrigeration is with to heat temperature range different, therefore needs to divide gear respectively for refrigeration and the temperature range that heats; For example, ultralowly can be 10 ~ 14 DEG C, lowlyer can be 14 ~ 18 DEG C, lowly can be 18 ~ 22 DEG C, about ultralow, lower, low etc., be the descriptor from temperature each temperature range from low to high, the scope that each descriptor is corresponding can be arranged as required.Compressor current is also done similar division, as { extra small, less, little, normal, greatly, comparatively large, super large }; For example, extra small is 100 ~ 200mA, and less is 200 ~ 300mA, etc.; About extra small, less, little etc., be descriptor corresponding between electric current each Current Zone from small to large, the scope that each descriptor is corresponding can be arranged as required.Compressor raising frequency speed is also divided into super slowly, more slowly, at a slow speed, positive constant speed, quick, very fast, ultrafast; For example, super is 0 ~ 1Hz/s slowly, is 1 ~ 2Hz/s etc. more slowly; About super slowly, more slowly, at a slow speed etc., be the interval corresponding descriptor of compressor raising frequency speed each raising frequency from slow to fast, the scope that each descriptor is corresponding can be arranged as required.Above demarcation interval can be digitized as respectively {-3 ,-2 ,-1,0,1,2,3}.For example, accordingly, above-mentioned ultralow, extra small, super slow correspondence-3; Lower, less, comparatively slow then correspondence-2, by that analogy.Then fuzzy decision mechanism is adopted to decide raising frequency speed stage according to the gear interval at the gentle compressor current place of the actual rings collected.Certainly, corresponding frequency reducing also can adopt raising frequency method of the present invention anti-.
Refer to Fig. 2, as shown in Figure 2, outdoor environment temperature is divided into { ultralow, lower, low, normally, high, higher, superelevation } totally 7 temperature ranges, rule of thumb determine the matching degree of each environment temperature and these temperature ranges, thus obtain the graph of a relation of temperature and degree of membership, it is the temperature spot of 1 that T1 ~ T7 is respectively these 7 temperature range degrees of membership, that is T1 ~ T7 is the separation of above-mentioned 7 temperature ranges, for example lower is 14 ~ 18 DEG C, so separation is 14 and 18, 14 is lower separation, 18 is then low separation, so when environment temperature is 16 DEG C, corresponding and lower degree of membership is 0.5, be 0.5 with low degree of membership.In like manner, the degree of membership graph of a relation of compressor current can be obtained according to identical method, as shown in Figure 3; It is the current point of 1 that I1 ~ I7 is respectively degree of membership between these 7 Current Zone.And the degree of membership graph of a relation of compressor raising frequency speed, as shown in Figure 4; V1 ~ V7 is respectively the raising frequency speed point that the interval degree of membership of these 7 raising frequencies is 1.
Then, according between each temperature range after digitlization, Current Zone and raising frequency interval, corresponding fuzzy control table is formed.As shown in table 1.
Table 1
As shown in table 1, T represents outdoor environment temperature, and I represents compressor current, and u represents the compressor raising frequency speed of output.In table, numeral corresponds to the corresponding gear of division, and as represented extra small for compressor current I:-3 ,-2 represent less, and-1 represents little, and 0 represents normal, and 1 represents large, and 2 represent comparatively large, and 3 represent super large.
Then, by outdoor environment temperature and compressor current obfuscation (divide different intervals by temperature and electric current, obtain different temperatures and electric current and the interval Degree of Accord Relation that conforms to, i.e. degree of membership); Then the fuzzy control rule table of being correlated with is obtained according to practical experience; Finally fuzzy decision: output quantity can be calculated according to methods such as gravity model appoaches, i.e. compressor raising frequency speed according to the obfuscation data of the input quantity obtained and fuzzy control rule table.
With concrete Application Example, that the present invention will be described in detail is as follows below.Convertible frequency air-conditioner reaches cooling activation condition, as design temperature >=△ T, the △ T=4 DEG C of the actual indoor environment temperature-air-conditioning of air-conditioning; Convertible frequency air-conditioner judges to need fast-refrigerating to meet client's comfortableness demand, and therefore convertible frequency air-conditioner enters very fast raising frequency pattern automatically.
Frequency-changeable compressor starts by 0Hz startup optimization, at F0 ~ F1(F0=0Hz; F1=60Hz), between compressor frequency, compressor is according to the fuzzy control table of table 1, and when outdoor environment temperature is ultralow and compressor current is extra small, compressor raising frequency speed is ultrafast; When outdoor environment temperature is ultralow and compressor current is less, compressor raising frequency speed is ultrafast; When the ultralow and compressor current hour of outdoor environment temperature, compressor raising frequency speed; The like.
If compressor raising frequency speed reaches ultrafast degree, compressor just carries out raising frequency according to the speed of 3Hz/s, and the time that compressor is used to the 60Hz of nominal operating frequency by 0Hz raising frequency is 60Hz ÷ 3Hz/s=20s; Considerably beyond common convertible frequency air-conditioner with the 60s time of 1Hz/s speed raising frequency; When compressor frequency reaches F1 ~ F2 interval more than F1 (F1=60Hz, F2=120Hz), in order to ensure compressor oil return and noise problem, the raising frequency speed of compressor is adjusted to the speed of normal 1Hz/s; When compressor frequency reach program preset frequency time, convertible frequency air-conditioner exits fast-refrigerating heating mode.
Illustrate as follows about fuzzy control method: if outdoor environment temperature and lower degree of conformity (degree of membership) are 0.6, are 0.4 with low degree of conformity, then can be expressed as: { 0,0.6,0.4,0,0,0,0}, if compressor current and extra small degree of conformity are 0.7, are 0.3 with less degree of conformity, then can be expressed as: { 0.7,0.3,0,0,0,0,0}; Relational matrix as shown in table 2 can be obtained according to pre-determined fuzzy control rule table.
Table 2
Then, associative list 1 and table 2, calculate according to gravity model appoach and export U=(0.6*3+0.3*2+0.4*2+0.3*2)/(0.6+0.3+0.4+0.3)=2.375.Finally be converted into actual raising frequency speed according to the division of compressor raising frequency speed by exporting U, raising frequency speed as represented fast is 3Hz/S, the raising frequency speed of supper-fast expression is 4Hz/S, then can calculate and export the raising frequency speed that represents of U=2.375 and be: 3.375Hz/S, thus draw the first raising frequency speed.It should be noted that, the first raising frequency speed is change, and environmentally temperature and compressor current calculate in real time.
The raising frequency method of convertible frequency air-conditioner provided by the invention, DC frequency-changeable compressor can reach specified 60Hz frequency when starting within 20 seconds, and existing general variable frequency starting technology needed for 60 seconds reaches 60Hz, this programme can startup stage improve 66% start efficiency, thus realize fast-refrigerating and heat object, improve the comfort of user; The present invention is ensureing the raising frequency speed that can improve compressor under compressor operating reliable prerequisite as far as possible, thus reaches the object of fast-refrigerating/heat, and brings and facilitates greatly.
Based on the raising frequency method of above-mentioned convertible frequency air-conditioner, the embodiment of the present invention additionally provides a kind of raising frequency system of convertible frequency air-conditioner, as shown in Figure 5, comprising:
Temperature acquisition module 10, the design temperature that environment temperature and user for obtaining environment residing for convertible frequency air-conditioner set; Specifically as described in step S100;
Temperature judge module 20, for judging whether the absolute value of the difference of environment temperature and design temperature is greater than temperature threshold, if yes, then performs the first raising frequency module 30; If NO, then the second raising frequency module 40 is performed; Specifically as described in step S200;
First raising frequency module 30, for environmentally temperature and compressor current, adopts FUZZY ALGORITHMS FOR CONTROL to calculate the first raising frequency speed of compressor, promotes the running frequency of compressor according to described first raising frequency speed; Specifically as described in step S300;
Second raising frequency module 40, for promoting the running frequency of compressor according to the second raising frequency speed preset; Wherein, described first raising frequency speed is more than or equal to the second raising frequency speed; Specifically as described in step S400.
Further, described first raising frequency module 30, also for promoting the running frequency of compressor according to described first raising frequency speed, when the running frequency of compressor reaches the first default running frequency, stops the running frequency promoting compressor.
Further, described second raising frequency module 40, also for promoting the running frequency of compressor according to the second raising frequency speed preset, when the running frequency of compressor reaches the first default running frequency, stops the running frequency promoting compressor.
Further, described first raising frequency module 30 comprises:
First raising frequency computing unit, for when the running frequency of compressor is lower than the second running frequency, environmentally temperature and compressor current, adopts FUZZY ALGORITHMS FOR CONTROL to calculate the first raising frequency speed of compressor, promotes the running frequency of compressor according to described first raising frequency speed;
Second raising frequency computing unit, for be more than or equal to the second running frequency when the running frequency of compressor and lower than the first running frequency preset time, promote the running frequency of compressor according to the 3rd raising frequency speed preset; Wherein, the second running frequency is less than the first running frequency; Described 3rd raising frequency speed is less than or equal to the first raising frequency speed, and described 3rd raising frequency speed is more than or equal to the second raising frequency speed.
Further, described first raising frequency module 30 comprises:
Fuzzy control table generation unit, for being divided into N number of temperature range from low to high by outdoor environment temperature; Compressor current is divided into from small to large between N number of Current Zone; By compressor raising frequency speed from interval to being divided into N number of raising frequency soon slowly; Between each temperature range, Current Zone and raising frequency interval is corresponding in turn to digitlization; According between each temperature range after digitlization, Current Zone and raising frequency interval, form corresponding fuzzy control table; Wherein, N is positive integer;
Degree of membership computing unit, for the operating current of the environment temperature and compressor that gather environment residing for convertible frequency air-conditioner; Computing environment temperature and compressor current and the interval degree of membership with the degree that conforms between Current Zone of corresponding different temperatures;
First raising frequency speed computing unit, for calculating the first raising frequency speed of compressor according to degree of membership and fuzzy control table by gravity model appoach.
The raising frequency system of described convertible frequency air-conditioner, wherein, described fuzzy control table generation unit, for being divided into { ultralow, lower, low, normal, high, higher, superelevation } totally 7 temperature ranges by outdoor environment temperature; Compressor current is divided into { extra small, less, little, normal, greatly, comparatively large, super large } between totally 7 Current Zone; Compressor raising frequency speed is divided into super slowly, more slowly, at a slow speed, positive constant speed, quick, very fast, ultrafast totally 7 raising frequency intervals; Between each temperature range, Current Zone and raising frequency interval is corresponding in turn to and is digitized as {-3 ,-2 ,-1,0,1,2,3}; According between each temperature range after digitlization, Current Zone and raising frequency interval, form corresponding fuzzy control table.
In sum, the raising frequency method and system of a kind of convertible frequency air-conditioner provided by the invention, the design temperature set by the environment temperature and user obtaining environment residing for convertible frequency air-conditioner; Judge whether the absolute value of the difference of environment temperature and design temperature is greater than temperature threshold, if yes, then environmentally temperature and compressor current, adopts FUZZY ALGORITHMS FOR CONTROL to calculate the first raising frequency speed of compressor, promotes the running frequency of compressor according to described first raising frequency speed; If NO, then the running frequency of compressor is promoted according to the second raising frequency speed preset; Wherein, described first raising frequency speed is more than or equal to the second raising frequency speed; The raising frequency speed of compressor can be improved fast, the object reaching fast-refrigerating or heat, also can not cause occurring integrity problem because of quick raising frequency by fuzzy control simultaneously, can not hardware cost be increased, bring to user and facilitate greatly.
Should be understood that, application of the present invention is not limited to above-mentioned citing, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection domain that all should belong to claims of the present invention.
Claims (10)
1. a raising frequency method for convertible frequency air-conditioner, is characterized in that, comprising:
The design temperature that A, the environment temperature obtaining environment residing for convertible frequency air-conditioner and user set;
B, judge whether the absolute value of the difference of environment temperature and design temperature is greater than temperature threshold, if yes, then perform step C; If NO, then step D is performed;
C, environmentally temperature and compressor current, adopt FUZZY ALGORITHMS FOR CONTROL to calculate the first raising frequency speed of compressor, promotes the running frequency of compressor according to described first raising frequency speed;
D, promote the running frequency of compressor according to the second raising frequency speed preset; Wherein, described first raising frequency speed is more than or equal to the second raising frequency speed.
2. the raising frequency method of convertible frequency air-conditioner according to claim 1, it is characterized in that, described step C also comprises: the running frequency promoting compressor according to described first raising frequency speed, when the running frequency of compressor reaches the first default running frequency, stops the running frequency promoting compressor;
Described step D also comprises: the running frequency promoting compressor according to the second raising frequency speed preset, and when the running frequency of compressor reaches the first default running frequency, stops the running frequency promoting compressor.
3. the raising frequency method of convertible frequency air-conditioner according to claim 1, is characterized in that, described step C also comprises:
C11, when the running frequency of compressor is lower than the second running frequency, environmentally temperature and compressor current, adopts FUZZY ALGORITHMS FOR CONTROL to calculate the first raising frequency speed of compressor, promotes the running frequency of compressor according to described first raising frequency speed;
C12, when the running frequency of compressor is greater than or equal to the second running frequency and lower than the first running frequency preset, promote the running frequency of compressor according to the 3rd raising frequency speed preset; Wherein, the second running frequency is less than the first running frequency; Described 3rd raising frequency speed is less than or equal to the first raising frequency speed, and described 3rd raising frequency speed is more than or equal to the second raising frequency speed.
4. the raising frequency method of convertible frequency air-conditioner according to claim 1, is characterized in that, described step C specifically comprises:
C21, outdoor environment temperature is divided into N number of temperature range from low to high; Compressor current is divided into from small to large between N number of Current Zone; By compressor raising frequency speed from interval to being divided into N number of raising frequency soon slowly; Between each temperature range, Current Zone and raising frequency interval is corresponding in turn to digitlization; According between each temperature range after digitlization, Current Zone and raising frequency interval, form corresponding fuzzy control table; Wherein, N is positive integer;
The environment temperature of environment and the operating current of compressor residing for C22, collection convertible frequency air-conditioner; Computing environment temperature and compressor current and the interval degree of membership with the degree that conforms between Current Zone of corresponding different temperatures;
C23, calculated the first raising frequency speed of compressor by gravity model appoach according to degree of membership and fuzzy control table.
5. the raising frequency method of convertible frequency air-conditioner according to claim 4, is characterized in that, described step C21 specifically comprises:
Outdoor environment temperature is divided into { ultralow, lower, low, normal, high, higher, superelevation } totally 7 temperature ranges; Compressor current is divided into { extra small, less, little, normal, greatly, comparatively large, super large } between totally 7 Current Zone; Compressor raising frequency speed is divided into super slowly, more slowly, at a slow speed, positive constant speed, quick, very fast, ultrafast totally 7 raising frequency intervals; Between each temperature range, Current Zone and raising frequency interval is corresponding in turn to and is digitized as {-3 ,-2 ,-1,0,1,2,3}; According between each temperature range after digitlization, Current Zone and raising frequency interval, form corresponding fuzzy control table.
6. a raising frequency system for convertible frequency air-conditioner, is characterized in that, comprising:
Temperature acquisition module, the design temperature that environment temperature and user for obtaining environment residing for convertible frequency air-conditioner set;
Temperature judge module, for judging whether the absolute value of the difference of environment temperature and design temperature is greater than temperature threshold, if yes, then performs the first raising frequency module; If NO, then the second raising frequency module is performed;
First raising frequency module, for environmentally temperature and compressor current, adopts FUZZY ALGORITHMS FOR CONTROL to calculate the first raising frequency speed of compressor, promotes the running frequency of compressor according to described first raising frequency speed;
Second raising frequency module, for promoting the running frequency of compressor according to the second raising frequency speed preset; Wherein, described first raising frequency speed is more than or equal to the second raising frequency speed.
7. the raising frequency system of convertible frequency air-conditioner according to claim 6, it is characterized in that, described first raising frequency module, also for promoting the running frequency of compressor according to described first raising frequency speed, when the running frequency of compressor reaches the first default running frequency, stop the running frequency promoting compressor;
Described second raising frequency module, also for promoting the running frequency of compressor according to the second raising frequency speed preset, when the running frequency of compressor reaches the first default running frequency, stops the running frequency promoting compressor.
8. the raising frequency system of convertible frequency air-conditioner according to claim 6, is characterized in that, described first raising frequency module comprises:
First raising frequency computing unit, for when the running frequency of compressor is lower than the second running frequency, environmentally temperature and compressor current, adopts FUZZY ALGORITHMS FOR CONTROL to calculate the first raising frequency speed of compressor, promotes the running frequency of compressor according to described first raising frequency speed;
Second raising frequency computing unit, for be more than or equal to the second running frequency when the running frequency of compressor and lower than the first running frequency preset time, promote the running frequency of compressor according to the 3rd raising frequency speed preset; Wherein, the second running frequency is less than the first running frequency; Described 3rd raising frequency speed is less than or equal to the first raising frequency speed, and described 3rd raising frequency speed is more than or equal to the second raising frequency speed.
9. the raising frequency system of convertible frequency air-conditioner according to claim 6, is characterized in that, described first raising frequency module comprises:
Fuzzy control table generation unit, for being divided into N number of temperature range from low to high by outdoor environment temperature; Compressor current is divided into from small to large between N number of Current Zone; By compressor raising frequency speed from interval to being divided into N number of raising frequency soon slowly; Between each temperature range, Current Zone and raising frequency interval is corresponding in turn to digitlization; According between each temperature range after digitlization, Current Zone and raising frequency interval, form corresponding fuzzy control table; Wherein, N is positive integer;
Degree of membership computing unit, for the operating current of the environment temperature and compressor that gather environment residing for convertible frequency air-conditioner; Computing environment temperature and compressor current and the interval degree of membership with the degree that conforms between Current Zone of corresponding different temperatures;
First raising frequency speed computing unit, for calculating the first raising frequency speed of compressor according to degree of membership and fuzzy control table by gravity model appoach.
10. the raising frequency system of convertible frequency air-conditioner according to claim 9, is characterized in that, described fuzzy control table generation unit, for outdoor environment temperature being divided into { ultralow, lower, low, normal, high, higher, superelevation } totally 7 temperature ranges; Compressor current is divided into { extra small, less, little, normal, greatly, comparatively large, super large } between totally 7 Current Zone; Compressor raising frequency speed is divided into super slowly, more slowly, at a slow speed, positive constant speed, quick, very fast, ultrafast totally 7 raising frequency intervals; Between each temperature range, Current Zone and raising frequency interval is corresponding in turn to and is digitized as {-3 ,-2 ,-1,0,1,2,3}; According between each temperature range after digitlization, Current Zone and raising frequency interval, form corresponding fuzzy control table.
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