CN109163424A - A kind of the dual temperature difference control method and system of convertible frequency air-conditioner - Google Patents
A kind of the dual temperature difference control method and system of convertible frequency air-conditioner Download PDFInfo
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- CN109163424A CN109163424A CN201811065737.6A CN201811065737A CN109163424A CN 109163424 A CN109163424 A CN 109163424A CN 201811065737 A CN201811065737 A CN 201811065737A CN 109163424 A CN109163424 A CN 109163424A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
Abstract
The present invention provides the dual temperature difference control methods and system of a kind of convertible frequency air-conditioner, this method comprises: in cooling mode, real-time detection indoor environment temperature；Obtain the set temperature and preset human comfort's temperature of convertible frequency air-conditioner；Determine first temperature difference and second temperature difference, first temperature difference is the temperature difference of the indoor environment temperature and the set temperature, and second temperature difference is the temperature difference of the indoor environment temperature and human comfort's temperature: the running frequency of compressor is adjusted according to first temperature difference and second temperature difference.Dual temperature difference control method of the present invention improves comfort level when air conditioner refrigerating, also reduces energy consumption.
Description
Technical field
The present invention relates to air-conditioning technical field, in particular to the dual temperature difference control method and system of a kind of convertible frequency air-conditioner.
Background technique
Currently, the technological trend of convertible frequency air-conditioner is comfort and health, most of control is mainly with set temperature and ring
The temperature difference of border temperature carries out the control of compressor frequency, to achieve the effect that fast cooling.But in fact, air-conditioning goes out wind-warm syndrome
Degree is at 8~12 DEG C or so, and compressor is lower than 8 DEG C when high-frequency strength operates, and long-play comfort is poor.
Summary of the invention
In view of this, the present invention is directed to propose a kind of dual temperature difference control method of convertible frequency air-conditioner, to solve air-conditioning for a long time
The problem of comfort difference when refrigeration.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of dual temperature difference control method of convertible frequency air-conditioner, comprising:
In cooling mode, real-time detection indoor environment temperature；
Obtain the set temperature and preset human comfort's temperature of the convertible frequency air-conditioner；
Determine that first temperature difference and second temperature difference, first temperature difference are the indoor environment temperature and the set temperature
The temperature difference, second temperature difference are the temperature difference of the indoor environment temperature and human comfort's temperature；
According to the running frequency of first temperature difference and second temperature difference adjustment compressor.
Further, the running frequency according to first temperature difference and second temperature difference adjustment compressor, comprising:
Determine that frequency reducing coefficient, the frequency reducing coefficient are the ratio of the indoor environment temperature and human comfort's temperature；
The first operational objective frequency that the compressor is determined according to first temperature difference, according to first temperature difference and the frequency reducing system
Number determines the second operational objective frequency of the compressor；
Judge whether second temperature difference is not less than zero；
If the determination result is YES, then the compressor is controlled to run with the first operational objective frequency；
If judging result be it is no, control the compressor and run with the second operational objective frequency.
Further, it is described in cooling mode, after real-time detection indoor environment temperature, further includes: record the pressure
The continuous operating time of contracting machine.
Further, the calculation formula of the first operational objective frequency are as follows:
In formula, FLc1 is the first operational objective frequency, and t1 is the continuous operating time of the compressor, and Δ T1 is institute
First temperature difference is stated, FL is the compressor minimum operation limit frequency, and FCH is the compressor highest run-limiting frequency.
Further, the calculation formula of the second operational objective frequency are as follows:
In formula, FLc2 is the second operational objective frequency, and t1 is the continuous operating time of the compressor, and Δ T1 is institute
First temperature difference is stated, FL is the compressor minimum operation limit frequency, and FCH is the compressor highest run-limiting frequency, and K is
The frequency reducing coefficient.
Further, the control compressor includes: with the second operational objective frequency operation
Obtain the current operation frequency of the compressor, and judge the current operation frequency of the compressor with it is described
Whether the size of the second operational objective frequency is identical；
If the current operation frequency of the compressor and the second operational objective frequency be not identical, described in acquisition
Compressor keeps the runing time of the current operation frequency, and judges that the compressor keeps the fortune of the current operation frequency
Whether the row time reaches given threshold；
If the compressor keeps the runing time of the current operation frequency to reach given threshold, the compression is controlled
Machine is run with the second operational objective frequency；If the compressor keeps the runing time of the current operation frequency to be not up to
Given threshold then controls the compressor and continues that the current operation frequency is kept to run, and reacquires the compressor and protect
The runing time for holding the current operation frequency is judged.
Further, the setting range of the given threshold is [3min, 5min].
Compared with the existing technology, the dual temperature difference control method of convertible frequency air-conditioner of the present invention has the advantage that
(1) the dual temperature difference control method of convertible frequency air-conditioner of the present invention introduces human comfort's temperature, according to indoor ring
The temperature difference of the temperature difference and indoor environment temperature of border temperature and set temperature and comfort temperature adjusts the operation frequency of compressor
Rate, realizes the control of dual temperature difference, targetedly promotes comfort level when air conditioner refrigerating；Increasing frequency reducing coefficient simultaneously, this is normal
Amount, by adjusting the running frequency of compressor, finally makes indoor environment temperature close to comfort temperature, and then improve air conditioner refrigerating
When comfort level.
(2) the dual temperature difference control method of convertible frequency air-conditioner of the present invention requires compressor first to protect before switchover operation frequency
Primary frequency operation a period of time is held, the switching of new target frequency value is then carried out again, avoids quick frequency reducing bring Indoor Temperature
Degree fluctuation is excessive, further improves comfort when air conditioner refrigerating, also reduces energy consumption.
It is comfortable when air-conditioning long-time is freezed to solve another object of the present invention is to propose a kind of double temperature control systems
Property difference problem.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of double temperature control systems of convertible frequency air-conditioner corresponding with the dual temperature difference control method of the convertible frequency air-conditioner, it is described
Double temperature control systems include: temperature sensor, temperature setting module, controller and compressor:
The temperature sensor is used in cooling mode, indoor environment temperature described in real-time detection；
The temperature setting module is used to obtain the set temperature of the convertible frequency air-conditioner and the preset human body relaxes
Thermophilic degree；
The controller is the indoor ring for determining first temperature difference and second temperature difference, first temperature difference
The temperature difference of border temperature and the set temperature, second temperature difference are the indoor environment temperature and human comfort's temperature
The temperature difference；The running frequency of the compressor is adjusted according to first temperature difference and second temperature difference.
Further, the compressor is adjusted according to first temperature difference and second temperature difference described in the controller
Running frequency, comprising:
Determine frequency reducing coefficient, the ratio of indoor environment temperature described in the frequency reducing coefficient and human comfort's temperature；Root
The first operational objective frequency that the compressor is determined according to first temperature difference, according to first temperature difference and the frequency reducing coefficient
Determine the second operational objective frequency of the compressor；
Judge whether second temperature difference is not less than zero；
If the determination result is YES, then the compressor is controlled to run with the first operational objective frequency；
If judging result be it is no, control the compressor and run with the second operational objective frequency.
Further, double temperature control systems further include: timing module, for recording the continuous fortune of the compressor
The row time.
Possessed advantage is identical compared with the existing technology with above-mentioned dual temperature difference control method for double temperature control systems,
Details are not described herein.
Detailed description of the invention
The attached drawing for constituting a part of the invention is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart of dual temperature difference control method described in the embodiment of the present invention；
Fig. 2 is the flow chart of step S400 in dual temperature difference control method described in the embodiment of the present invention
Fig. 3 is the flow chart of step S430 in dual temperature difference control method described in the embodiment of the present invention；
Fig. 4 is the flow chart of step S440 in dual temperature difference control method described in the embodiment of the present invention；
Fig. 5 is the structural block diagram of double temperature control systems described in the embodiment of the present invention.
Description of symbols:
1- temperature sensor, 2- temperature setting module, 3- controller, 4- compressor, 5- timing module.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
Embodiment 1
As shown in Figure 1, for the flow chart of the dual temperature difference control method of convertible frequency air-conditioner in the present embodiment, in combination with Fig. 2 institute
Show, the dual temperature difference control method of convertible frequency air-conditioner provided in this embodiment includes the following steps:
S100: in cooling mode, real-time detection indoor environment temperature TA；
S200: the set temperature TS and preset human comfort's temperature TR of convertible frequency air-conditioner are obtained；
S300: determining the first temperature difference T1 and the second temperature difference T2, and the first temperature difference T1 is indoor environment temperature TA and set
Determine the temperature difference of temperature TS, the second temperature difference T2 is the temperature difference of indoor environment temperature TA and human comfort's temperature TR；
S400: according to the running frequency of the first temperature difference T1 and the second temperature difference T2 adjustment compressor, in which:
S410: determine that frequency reducing COEFFICIENT K, frequency reducing COEFFICIENT K are the ratio of indoor environment temperature TA and human comfort's temperature TR: root
The first operational objective frequency FLc1 of compressor is determined according to the first temperature difference T1, it is true according to the first temperature difference T1 and frequency reducing COEFFICIENT K
Determine the second operational objective frequency FLc2 of compressor；
S420: judge whether the second temperature difference T2 is not less than zero；
S430: it if the determination result is YES, then controls compressor and is run with the first operational objective frequency FLc1；
S440: if judging result be it is no, control compressor and run with the second operational objective frequency FLc2.
Wherein, in step S100 further include: the continuous operating time t1 of recording compressed machine.
In step S410, the calculation formula of the first operational objective frequency FLc1 are as follows:
The calculation formula of second operational objective frequency FLc2 are as follows:
In formula, FLc1 is the first operational objective frequency, and FLc2 is the second operational objective frequency, and t1 is the continuous fortune of compressor
Row time, Δ T1 are first temperature difference, and FL is compressor minimum operation limit frequency, and FCH is compressor highest run-limiting frequency,
K is frequency reducing coefficient.
Convertible frequency air-conditioner is opened, into after refrigeration mode, temperature sensor real-time detection air-conditioning air inlet air themperature, and meter
When module start recording compressor continuous operating time t1；The air themperature of air-conditioning air inlet is indoor environment temperature
TA, the indoor environment temperature TA that temperature sensor will test are sent to controller, and controller receives current indoor environment temperature
TA；The human comfort temperature TR that the set temperature TS and air-conditioning that air-conditioning remote control obtains user's current setting are arranged when dispatching from the factory, and
Controller is sent by set temperature TS and human comfort's temperature TR, controller is according to current indoor environment temperature TA, setting
Temperature TS and human comfort temperature TR, calculates the temperature difference of indoor environment temperature TA Yu set temperature TS, as the first temperature difference
T1, i.e. Δ T1=TA-TS calculate the temperature difference of indoor environment temperature TA Yu human comfort's temperature TR, as the second temperature difference T2,
That is Δ T2=TA-TR calculates the ratio of indoor environment temperature TA Yu human comfort's temperature TR, as frequency reducing COEFFICIENT K, i.e. K=
TA/TR；According to the continuous operating time t1 of the first temperature difference T1 numberical range and compressor fallen into, it is corresponding to choose compressor
The calculation formula of first operational objective frequency FLc1 and the second operational objective frequency FLc2, and it is calculated from the formula the first operation
Target frequency FLc1 and the second operational objective frequency FLc2；Judge whether the second temperature difference T2 is not less than zero, if Δ T2 >=0,
Control compressor is run with the first operational objective frequency FLc1, if Δ T2 < 0, controls compressor with the second operational objective frequency
FLc2 operation, in this way, realizing the tune of compressor operating frequency under refrigeration mode by the first temperature difference T1 and the second temperature difference T2
It is whole.
In no introducing human comfort's temperature TR, frequency reducing COEFFICIENT K, the second temperature difference T2 and the second operational objective frequency FLc2
When, for air-conditioning in process of refrigerastion, user is relatively low by the set temperature TS that remote controler is arranged so that the first temperature difference T1 >=3
When, the first operational objective frequency FLc1 of compressor is equal to compressor highest run-limiting frequency FCH, so that compressor exists always
High band operation, causes leaving air temp lower than 8 DEG C, long-play influences the comfort of air conditioning exhausting, is also easy to cause air-conditioning
Disease influences the health of human body, and compressor is run for a long time with high band, and consumption energy is big, and energy-saving effect is poor.And this implementation
Method in example introduces human comfort's temperature TR, according to the first temperature difference T1 and frequency reducing COEFFICIENT K, calculates the second operational objective frequency
FLc2 determines the operational objective frequency of compressor by judging whether the second temperature difference T2 is not less than zero, realizes the control of dual temperature difference
System.In this way, it is relatively low in set temperature TS and when making the first temperature difference T1 >=3, with the increase of cooling time, indoor environment temperature
Degree TA is gradually decreased, and when indoor environment temperature TA decreases below human comfort temperature TR, the second temperature difference T2 < 0, pressure
Contracting machine is run with the second operational objective frequency FLc2, due to the second operational objective frequency FLc2=FCH*K, and frequency reducing coefficient at this time
K is less than 1, therefore calculated second operational objective frequency FLc2 is less than compressor highest run-limiting frequency FCH, so that compressor
It is run in the frequency band less than highest run-limiting frequency FCH, avoids leaving air temp too low and influence the comfort level of air-conditioning.
When air-conditioning is in the operation of the scenes such as sleep, this dual temperature difference control method improves the leaving air temp of air-conditioning, so that
The leaving air temp of air-conditioning is controlled at 8~12 DEG C or so, reduces the probability of the air conditioner diseases such as flu, headache, improves the strong of air-conditioning
Kang Xing, but also the energy conservation and consumption reduction effects of air-conditioning are more preferably.
Preferably, human comfort's temperature is set as 25 DEG C, can also be adaptively adjusted according to the actual situation.
Embodiment 2
Dual temperature difference control method as described above, the present embodiment is different from place and is, as shown in figure 3, this implementation
Step S430 in example includes the following steps:
S431: the current operation frequency of compressor is obtained；
S432: judge whether the current operation frequency of compressor is identical as the size of the first operational objective frequency FLc1；
S433: it if the current operation frequency of compressor is not identical as the size of the first operational objective frequency FLc1, obtains
The runing time of compressor holding current operation frequency；
S434: judge that compressor keeps whether the runing time of current operation frequency reaches given threshold；
S435: if compressor keeps the runing time of current operation frequency to reach given threshold, compressor is controlled with the
Two operational objective frequency FLc2 operation；If compressor keeps the runing time of current operation frequency to be not up to given threshold, return
Return step S433.
As shown in figure 4, the step S440 in the present embodiment includes the following steps:
S441: the current operation frequency of compressor is obtained；
S442: judge whether the current operation frequency of compressor is identical as the size of the second operational objective frequency FLc2；
S443: it if the current operation frequency of compressor is not identical as the size of the second operational objective frequency FLc2, obtains
The runing time of compressor holding current operation frequency；
S444: judge that compressor keeps whether the runing time of current operation frequency reaches given threshold；
S445: if compressor keeps the runing time of current operation frequency to reach given threshold, compressor is controlled with the
Two operational objective frequency FLc2 operation；If compressor keeps the runing time of current operation frequency to be not up to given threshold, return
Return step S443.
In this way, after the operational objective frequency of compressor has been determined, first judge compressor current operation frequency whether with meter
The operational objective frequency of calculating is identical, and judging result is when being, compressor maintains primary frequency operation, only when judging result is no
When be just determined further so that entire control process is more reasonable, reliable.
After judging that compressor current operation frequency and calculated operational objective frequency be not identical, controller will not also
Compressor is immediately controlled and switches new target frequency, but first judge compressor keep current operation frequency runing time whether
Reach given threshold；If the determination result is YES, then the switching that compressor carries out new target frequency value is controlled；If judging result is
It is no, then it reacquires compressor and keeps the runing time of current operation frequency, and rejudge compressor and keep current operation frequency
Whether the runing time of rate reaches given threshold, until the result judged is yes, then controls compressor and carries out new target frequency
The switching of value, bring fluctuations in indoor temperature is excessive when can be avoided the quick frequency reducing of compressor in this way, influences comfort.
Embodiment 3
Dual temperature difference control method as described above, the present embodiment are different from place and are, the setting in the present embodiment
The setting range of threshold value is [3min, 5min].
The present embodiment preferably set threshold value be 5min, i.e., controller at interval of 5 minutes just to the running frequency of compressor into
The primary adjustment of row, so recycles.After this 5 minutes operation, the evaporator in air-conditioning is absorbed compressor by heat exchange
Indoor section heat reduces indoor environment temperature TA, reduces between indoor environment temperature TA and the leaving air temp of air-conditioning
Gap controls the switching that compressor carries out new target frequency value again at this time, smaller to fluctuations in indoor temperature, is equivalent to and plays one
Fixed buffer function, thus comfort level when further improving refrigerating of convertible frequency air conditioner.
Optionally, the setting range of given threshold can also carry out adaptation according to the actual situation.
Embodiment 4
Dual temperature difference control method as described above, the present embodiment are different from place and are, the compression in the present embodiment
The rate that machine switches from current operation frequency to target frequency is 1HZ/2S.
In this way, compressor at the uniform velocity carries out lifting/lowering frequency with the rate of 1HZ/2S, until reaching target frequency, frequency is completed
Adjustment, guarantee compressor steady operation.
Embodiment 5
Dual temperature difference control method as described above, the present embodiment be different from place be, the present embodiment be with it is described
The corresponding double temperature control systems of dual temperature difference control method, as shown in figure 5, double temperature control systems in the present embodiment include
Temperature sensor 1, temperature setting module 2, controller 3, compressor 4 and timing module 5:
Temperature sensor 1 is used in cooling mode, real-time detection indoor environment temperature TA；
Timing module 5, the continuous operating time t1 for recording compressed machine 4；
Temperature setting module 2 is used to obtain the set temperature TS and preset human comfort's temperature TR of convertible frequency air-conditioner；
Controller 3 is for determining that the first temperature difference T1 and the second temperature difference T2, the first temperature difference T1 are indoor environment temperature
The temperature difference of TA and set temperature TS, the second temperature difference T2 are the temperature difference of indoor environment temperature TA and human comfort's temperature TR；According to
The running frequency of first temperature difference T1 and the second temperature difference T2 adjustment compressor 4.
Specifically, the running frequency of compressor 4 is adjusted in controller 3 according to the first temperature difference T1 and the second temperature difference T2,
Include:
Determine that frequency reducing COEFFICIENT K, frequency reducing COEFFICIENT K are the ratio of indoor environment temperature TA and human comfort's temperature TR；According to
One temperature difference T1 determines the first operational objective frequency FLc1 of compressor 4；Pressure is determined according to the first temperature difference T1 and frequency reducing COEFFICIENT K
Second operational objective frequency FLc2 of contracting machine 4；
Judge whether the second temperature difference T2 is not less than zero；
If the determination result is YES, then compressor 4 is controlled to run with the first operational objective frequency FLc1；
If judging result be it is no, control compressor 4 and run with the second operational objective frequency FLc2.
After air-conditioning opens refrigeration mode, temperature sensor 1 in real time open by induction indoor air inlet air themperature, timing module 5
The continuous operating time t1 of beginning recording compressed machine 4, the air themperature are indoor environment temperature TA, and temperature sensor 1 will test
To current indoor environment temperature TA be sent to controller 3；The set temperature of the acquisition user's current setting of temperature setting module 2
The human comfort temperature TR that TS and air-conditioning are arranged when dispatching from the factory, and it is sent to controller 3；Controller 3 receives temperature sensor 1 and temperature
After spending the temperature signal that setting module 2 is sent, according to current indoor environment temperature TA, set temperature TS and the human body received
Comfort temperature TR calculates the temperature difference of indoor environment temperature TA Yu set temperature TS, as the first temperature difference T1, i.e. Δ T1=
TA-TS calculates the temperature difference of indoor environment temperature TA Yu human comfort's temperature TR, as the second temperature difference T2, i.e. Δ T2=TA-
TR calculates the ratio of indoor environment temperature TA Yu human comfort's temperature TR, as frequency reducing COEFFICIENT K, i.e. K=TA/TR；Controller
3 according to the continuous operating time t1 of the first temperature difference T1 numberical range fallen into and compressor 4, chooses compressor 4 corresponding the
The calculation formula of one operational objective frequency FLc1 and the second operational objective frequency FLc2, and it is calculated from the formula the first operation mesh
Mark frequency FLc1 and the second operational objective frequency FLc2；Controller 3 judges whether the second temperature difference T2 is not less than zero, if Δ T2 >=
0, then it controls compressor 4 and is run with the first operational objective frequency FLc1, if Δ T2 < 0, control compressor 4 with the second operation mesh
Frequency FLc2 operation is marked, and calculated operational objective frequency signal is sent to the electric expansion valve of compressor 4, passes through control
Electric expansion valve increases/reduce aperture, to realize the running frequency of adjustment compressor 4.
The control system of the present embodiment by temperature setting module 2 increase human body comfort temperature TR setting, and
Increase the calculating of the second temperature difference T2, frequency reducing COEFFICIENT K and the second actual motion target frequency FLc2, controller 3 in controller 3
Determine that compressor 4 is with the first operational objective frequency FLc1 or second by judging whether the second temperature difference T2 is not less than zero
As current operational objective frequency, and finally, control compressor 4 is run operational objective frequency FLc2 with the operational objective frequency.
In this way, controller 3 is according to first temperature difference when set temperature TS is arranged relatively low and makes the first temperature difference T1 >=3 by user
The numberical range that Δ T1 is fallen into selects the corresponding calculation formula of the first operational objective frequency FLc1 are as follows: FLc1=FCH, the second fortune
The corresponding calculation formula of row target frequency FLc2 are as follows: FLc2=FCH*K；Due to the increase with cooling time, indoor environment temperature
Degree TA is gradually decreased, and when indoor environment temperature TA decreases below human comfort temperature TR, the second temperature difference T2 < 0, pressure
Contracting machine 4 is run with the second operational objective frequency FLc2, due to the second operational objective frequency FLc2=FCH*K, and frequency reducing system at this time
For number K less than 1, this makes calculated second operational objective frequency FLc2 be less than compressor highest run-limiting frequency FCH, compression
Machine 4 is run in the frequency band less than highest run-limiting frequency FCH, and it is lower and influence the comfortable of air-conditioning to avoid leaving air temp
Property and health, energy saving.
Embodiment 6
Double temperature control systems as described above, the present embodiment are different from place and are, the control in the present embodiment
Compressor 4 is controlled in device 3 to run with the first operational objective frequency FLc1, comprising:
Obtain the current operation frequency of compressor 4；
Judge whether the current operation frequency of compressor 4 is identical as the size of the first operational objective frequency FLc1；
If the current operation frequency of compressor 4 is not identical as the size of the first operational objective frequency FLc1, compression is obtained
The runing time of machine holding current operation frequency；
Judge that compressor 4 keeps whether the runing time of current operation frequency reaches given threshold；
If compressor 4 keeps the runing time of current operation frequency to reach given threshold, compressor 4 is controlled with the first fortune
Row target frequency FLc1 operation；If compressor 4 keeps the runing time of current operation frequency to be not up to given threshold, obtain again
It takes compressor 4 to keep the runing time of current operation frequency and is judged.
Compressor 4 is controlled in controller 3 to run with the second operational objective frequency FLc2, comprising:
Obtain the current operation frequency of compressor 4；
Judge whether the current operation frequency of compressor 4 is identical as the size of the second operational objective frequency FLc2；
If the current operation frequency of compressor 4 is not identical as the size of the second operational objective frequency FLc2, compression is obtained
The runing time of machine holding current operation frequency；
Judge that compressor 4 keeps whether the runing time of current operation frequency reaches given threshold；
If compressor 4 keeps the runing time of current operation frequency to reach given threshold, compressor 4 is controlled with the second fortune
Row target frequency FLc2 operation；If compressor 4 keeps the runing time of current operation frequency to be not up to given threshold, obtain again
It takes compressor 4 to keep the runing time of current operation frequency and is judged.
In this way, controller 3 after the operational objective frequency of compressor 4 has been determined, first judges 4 current operation frequency of compressor
Whether identical as calculated operational objective frequency, judging result is when being, control compressor 4 maintains primary frequency operation, only
It is just determined further when the judgment result is no, improves the reasonability and reliability of control system.
After judging that 4 current operation frequency of compressor and calculated operational objective frequency be not identical, controller 3 will not
Compressor 4 is immediately controlled and switches new target frequency, but first judge compressor 4 keep current operation frequency runing time be
It is no to reach given threshold；If the determination result is YES, then the switching that compressor 4 carries out new target frequency value is controlled；If judgement knot
Fruit be it is no, then reacquire compressor 4 keep current operation frequency runing time and judged, until compressor 4 keep
The runing time of former running frequency reaches given threshold, then controls the switching that compressor 4 carries out new target frequency value, such energy
Bring fluctuations in indoor temperature is excessive when enough avoiding 4 quick frequency reducing of compressor, influences comfort.
Further, the setting range of given threshold is [3min, 5min], and it is 5min that the present embodiment, which preferably sets threshold value,
I.e. controller 3 just once adjusted the running frequency of compressor 4 at interval of 5 minutes, so recycled.Compressor 4 by this 5
After the operation of minute, the evaporator in air-conditioning absorbs indoor section heat, reduces indoor environment temperature by heat exchange
TA reduces the gap between indoor environment temperature TA and the leaving air temp of air-conditioning, controls compressor 4 again at this time and carries out new mesh
The switching of frequency values is marked, it is smaller to fluctuations in indoor temperature, it is equivalent to and plays certain buffer function, to further improve change
Comfort level when frequency air conditioner refrigerating.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of dual temperature difference control method of convertible frequency air-conditioner characterized by comprising
In cooling mode, real-time detection indoor environment temperature；
Obtain the set temperature and preset human comfort's temperature of the convertible frequency air-conditioner；
Determine that first temperature difference and second temperature difference, first temperature difference are the temperature of the indoor environment temperature and the set temperature
Difference, second temperature difference are the temperature difference of the indoor environment temperature and human comfort's temperature；
According to the running frequency of first temperature difference and second temperature difference adjustment compressor.
2. dual temperature difference control method according to claim 1, which is characterized in that described according to first temperature difference and described
The running frequency of second temperature difference adjustment compressor, comprising:
Determine that frequency reducing coefficient, the frequency reducing coefficient are the ratio of the indoor environment temperature and human comfort's temperature；
The first operational objective frequency that the compressor is determined according to first temperature difference, according to first temperature difference and the drop
Frequency coefficient determines the second operational objective frequency of the compressor；
Judge whether second temperature difference is not less than zero；
If the determination result is YES, then the compressor is controlled to run with the first operational objective frequency；
If judging result be it is no, control the compressor and run with the second operational objective frequency.
3. dual temperature difference control method according to claim 1, which is characterized in that it is described in cooling mode, real-time detection
After indoor environment temperature, further includes: record the continuous operating time of the compressor.
4. dual temperature difference control method according to claim 2, which is characterized in that the calculating of the first operational objective frequency
Formula are as follows:
In formula, FLc1 is the first operational objective frequency, and t1 is the continuous operating time of the compressor, and Δ T1 is described the
One temperature difference, FL are the compressor minimum operation limit frequency, and FCH is the compressor highest run-limiting frequency.
5. dual temperature difference control method according to claim 2, which is characterized in that the calculating of the second operational objective frequency
Formula are as follows:
In formula, FLc2 is the second operational objective frequency, and t1 is the continuous operating time of the compressor, and Δ T1 is described the
One temperature difference, FL are the compressor minimum operation limit frequency, and FCH is the compressor highest run-limiting frequency, and K is described
Frequency reducing coefficient.
6. dual temperature difference control method according to claim 2, which is characterized in that the control compressor is with described the
Two operational objective frequencies are run
The current operation frequency of the compressor is obtained, and judges the current operation frequency and described second of the compressor
Whether the size of operational objective frequency is identical；
If the current operation frequency of the compressor and the second operational objective frequency be not identical, the compression is obtained
Machine keeps the runing time of the current operation frequency, and when judging that the compressor keeps the operation of the current operation frequency
Between whether reach given threshold；
If the compressor keeps the runing time of the current operation frequency to reach given threshold, control the compressor with
The second operational objective frequency operation；If the compressor keeps the runing time of the current operation frequency not up to set
Threshold value then controls the compressor and continues that the current operation frequency is kept to run, and reacquires the compressor and keep institute
The runing time for stating current operation frequency is judged.
7. dual temperature difference control method according to claim 6, which is characterized in that the setting range of the given threshold is
[3min, 5min].
8. a kind of convertible frequency air-conditioner corresponding with the dual temperature difference control method of convertible frequency air-conditioner any in claim 1-7 is double
Temperature control system, which is characterized in that double temperature control systems include: temperature sensor (1), temperature setting module (2),
Controller (3) and compressor (4)；
The temperature sensor (1) is used in cooling mode, indoor environment temperature described in real-time detection；
The temperature setting module (2) be used for obtain the convertible frequency air-conditioner the set temperature and the preset human comfort
Temperature；
The controller (3) is the indoor ring for determining first temperature difference and second temperature difference, first temperature difference
The temperature difference of border temperature and the set temperature, second temperature difference are the indoor environment temperature and human comfort's temperature
The temperature difference；The running frequency of the compressor (4) is adjusted according to first temperature difference and second temperature difference.
9. double temperature control systems according to claim 8, which is characterized in that according to institute described in the controller (3)
It states first temperature difference and second temperature difference adjusts the running frequency of the compressor (4), comprising:
Determine that frequency reducing coefficient, the frequency reducing coefficient are the ratio of the indoor environment temperature and human comfort's temperature；According to
First temperature difference determines the first operational objective frequency of the compressor (4), according to first temperature difference and the drop
Frequency coefficient determines the second operational objective frequency of the compressor (4)；
Judge whether second temperature difference is not less than zero；
If the determination result is YES, then the compressor (4) is controlled to run with the first operational objective frequency；
If judging result be it is no, control the compressor (4) and run with the second operational objective frequency.
10. double temperature control systems according to claim 8, which is characterized in that double temperature control systems further include:
Timing module (5), for recording the continuous operating time of the compressor (4).
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