CN102563805B - Control method for calculating exhaust temperature of compressor of air conditioner - Google Patents
Control method for calculating exhaust temperature of compressor of air conditioner Download PDFInfo
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- CN102563805B CN102563805B CN201110435926XA CN201110435926A CN102563805B CN 102563805 B CN102563805 B CN 102563805B CN 201110435926X A CN201110435926X A CN 201110435926XA CN 201110435926 A CN201110435926 A CN 201110435926A CN 102563805 B CN102563805 B CN 102563805B
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Abstract
The invention discloses a control method for calculating exhaust temperature of a compressor of an air conditioner. Temperature sensors are respectively mounted on an outdoor heat exchanger and an indoor heat exchanger and are used for detecting the outdoor heat exchanger temperature Te and the indoor heat exchange temperature Tc; the method for calculating the exhaust temperature of the compressor comprises the specific steps of: A, calculating a temperature correction value Tc' of the indoor heat exchanger according to the detected indoor heat exchanger temperature Tc and the operation frequency fi of a current compressor, wherein the Tc' is equal to Tc plus fi/a plus b, a is a frequency correction coefficient of the compressor and ranges from 5-40Hz and b is a temperature correction value of the indoor heat exchanger and ranges from -5DEG C-10DEG C; and B, calculating a temperature correction value Te' of the outdoor heat exchanger according to the detected temperature Te of the outdoor heat exchanger, wherein the Te' is equal to Te plus c. The control method has the characteristics of flexibility in operation, low manufacturing cost and wide application range.
Description
Technical field
The present invention relates to a kind of air-conditioner, particularly a kind of control method of calculating the compressor exhaust temperature of air-conditioner.
Background technology
Evaporating temperature and outdoor heat exchange actuator temperature when transducer air conditioning generally is equipped with temperature sensor and detects Air Conditioning Cycle in the indoor and outdoor heat exchanger, and the compressor exhaust temperature sensor also has been installed in the blast pipe position of compressor, delivery temperature while being used for detecting compressor operating, size according to the height estimation compressor load of the delivery temperature of compressor, according to the compressor load of estimation is excessive, carry out the compressor limit frequently or stoppage protection, thereby protection system, and bring into play maximum efficiency, perhaps whether enough for detection of coolant quantity in air-conditioner system, can also carry out the control to electronic expansion valve opening according to the delivery temperature value of compressor.
And in a single day traditional transducer air conditioning while detecting the exhaust gas temperature sensor fault; just make stoppage protection; make transducer air conditioning normally to move; perhaps delivery temperature is fixed as to a higher temperature; make system turn round under lower load, above processing all can not allow transducer air conditioning operate under maximal efficiency.
Traditional transducer air conditioning is when detecting the exhaust gas temperature sensor fault of compressor, just the simple compressor that detects is after unlatching a period of time, the too low critical value of the exhaust gas temperature sensor that system detects or when crossing higher than critical value, just judge the exhaust gas temperature sensor fault, and the method for this judgement exhaust gas temperature sensor fault can't judge the situation of exhaust gas temperature sensor according to position skew or detachment of exhaust temperature sensor.
Summary of the invention
Purpose of the present invention aims to provide the control method of the compressor exhaust temperature of a kind of flexible operation, cost of manufacture reckoning air-conditioner low, applied widely, to overcome weak point of the prior art.
A kind of control method of calculating the compressor exhaust temperature of air-conditioner by this purpose design, it is characterized in that difference mounting temperature sensor on outdoor heat exchanger and indoor heat exchanger, by the external heat exchanger temperature T e of temperature sensor sensing chamber and indoor heat exchanger temperature T c;
The concrete steps of calculating compressor exhaust temperature comprise:
Steps A, according to the running frequency fi of detected indoor heat exchanger temperature T c and current compressor, calculate the temperature correction value Tc ' of indoor heat exchanger, Tc '=Tc+fi/a+b; Wherein, a is the compressor frequency correction factor, and the span of a is 5Hz～40Hz, and b is the compensating value of indoor heat exchanger temperature, and the span of b is-5 ℃～10 ℃;
Step B, according to detected outdoor heat exchanger temperature T e, the temperature correction value Te ' of counting chamber external heat exchanger, Te '=Te+c; Wherein, c is the temperature correction coefficient of outdoor heat exchanger, and the span of c is-5 ℃～10 ℃;
Step C, the temperature curve according to the Te ' under the temperature correction value Tc ' that presets corresponding different indoor heat exchangers-Td ', calculate corresponding compressor exhaust temperature presumed value Td ';
Perhaps, the temperature curve according to the Tc ' under the temperature correction value Te ' that presets corresponding different outdoor heat exchangers-Td ', calculate corresponding compressor exhaust temperature presumed value Td ';
Step D, according to the compressor exhaust temperature presumed value Td ' that step C calculates, calculate current compressor exhaust temperature value Td, Td=Td '+d; Wherein, d is that delivery temperature is calculated compensating value, and the span of d is 0～20 ℃.
The concrete steps of described reckoning compressor exhaust temperature also comprise the step D1 be positioned at after step D,
Step D1, if current compressor when high frequency turns round, also needs to increase compressor high frequency running correction, i.e. current compressor exhaust temperature value Td=Td '+d+k * (fi-fb); Wherein, fi is the running frequency of current compressor, and fb is a reference value of the high frequency frequency of moving of compressor, and the span of fb is 70Hz～150Hz, and k is the high frequency running correction factor of compressor, and the span of k is 0.05～0.3.
In step C, the temperature curve of described Te '-Td ', be that Td ' is along with the change of the temperature correction value Te ' of outdoor heat exchanger (1) reduces greatly when the temperature correction value Tc ' of indoor heat exchanger (a 2) timing;
Described basis presets the temperature curve of Te ' under the temperature correction value Tc ' of corresponding different indoor heat exchanger (2)-Td ', preset Tc '=the 1st temperature T 1, Tc '=the 2nd temperature T 2, Tc '=the 3rd temperature T 3,, Tc '=(m-1) temperature T
M-1, Tc '=m bar curves such as m temperature T m, wherein, the span of m is 3～50;
The curve of described Tc '=the 1st temperature T 1 is divided into n section straight line, the different computing formula of temperature correction value Te ' selection of the outdoor heat exchanger current according to air-conditioner (1), and wherein, the span of n is 3～50;
As Te '<Te
1The time, Td '=Td
1
Work as Te
1≤ Te '<Te
2The time, Td '=(Td
2-Td
1) * (Te '-Td
1)/(Td
2-Td
1)+Td
1
Work as Te
2≤ Te '<Te
3The time, Td '=(Td
3-Td
2) * (Te '-Td
2)/(Td
3-Td
2)+Td
2
Work as Te
3≤ Te '<Te
4The time, Td '=(Td
4-Td
3) * (Te '-Td
3)/(Td
4-Td
3)+Td
3
……；
Work as Te
(n-2)≤ Te '<Te
(n-1)The time,
Td′＝（Td
（n-1）-Td
（n-2））×（Te′-Td
（n-2））/（Td
（n-1）-Td
（n-2））+Td
（n-2）；
Work as Te
(n-1)≤ Te '<Te
nThe time,
Td′＝（Td
n-Td
（n-1））×（Te′-Td
（n-1））/（Td
n-Td
（n-1））+Td
（n-1）；
Work as Te
nDuring≤Te ', Td '=Td
n
Wherein, Te
1<Te
2<Te
3<...<Te
N-2<Te
N-1<Te
n
Te
1, Te
2, Te
3..., Te
N-2, Te
N-1, Te
nSpan separately is-50 ℃～100 ℃;
Td
1, Td
2, Td
3, Td
4..., Td
N-2, Td
N-1, Td
n5 ℃～100 ℃ of sampling scopes separately;
Based on identical reason,
The curve of described Tc '=the 2nd temperature T 2 is divided into p section straight line,
Tc '=the 3rd temperature T 3 curves are divided into q section straight line,
Tc '=(n-1) temperature T
N-1Curve be divided into r section straight line,
Tc '=n temperature T
nCurve be divided into s section straight line,
The different computing formula of temperature correction value Te ' selection of the outdoor heat exchanger current according to air-conditioner (1), the computing formula of the curve of this computing formula and above-mentioned Tc '=the 1st temperature T 1 is similar, just no longer is described further here, wherein, p, q, r, the span of s is 3～50;
Calculate corresponding compressor exhaust temperature presumed value Td ' time,
The temperature correction value Tc ' of the indoor heat exchanger (2) that at first, will be calculated by steps A and predefined the 1st temperature T the 1, the 2nd temperature T the 2, the 3rd temperature T 3 ..., the m-2 temperature T
M-2, the m-1 temperature T
M-1With the n temperature T
mBig or small, determine the interval at Tc ' place,
When T1<Tc '<T2, the interval at Tc ' place is [T1, T2], selects the curve of Tc '=the 1st temperature T 1 and the curve of Tc '=the 2nd temperature T 2,
Secondly, then the size of the temperature correction value Te ' of the outdoor heat exchanger (1) calculated by step B, from above computing formula, selecting corresponding computing formula; According to this computing formula of selecting, calculate again the Td ' 1 of compressor exhaust temperature of the curve of Tc '=the 1st temperature T 1, and the second reckoning value Td ' 2 of the curve compressor exhaust temperature of Tc '=the 2nd temperature T 2;
Afterwards, then calculate compressor exhaust temperature presumed value Td ', Td '=(Td ' 2-Td ' 1) * (Tc '-T1)/(T2-T1)+Td ' 1,
Based on identical reason, during in other temperature ranges, also according to above similar computational methods, calculate compressor exhaust temperature presumed value Td ' as Tc ';
In the air-condition freezing circulation, the temperature curve of described Tc '-Td ', for working as Te ' regularly, Td ' is along with the change of Tc ' becomes large greatly; Its concrete calculating is finished the work with the curve of above-mentioned Te '-Td ' is similarly, is also equivalence fully.
In a period of time t1 that compressor is opened, forbid carrying out the compressor exhaust temperature reckoning, the span of t1 is 30s～600s.
When the air conditioner heat-production defrost moves or defrost in a period of time t2, forbid carrying out the compressor exhaust temperature reckoning while finishing, the span of t2 is 30s～600s.
After the present invention adopts above-mentioned technical scheme; by the external heat exchanger temperature T e of sensing chamber and indoor heat exchanger temperature T c; according to the current compressor operating frequency in the air-conditioning system running, calculate compressor exhaust temperature again; and the temperature value that can detect by the exhaust gas temperature sensor that the delivery temperature value of extrapolating is installed with system relatively; judge that exhaust gas temperature sensor that system installs is whether abnormal or installation of sensors is bad; according to the exhaust gas temperature sensor of calculating, carry out system frequency control again, guarantee the maximal efficiency operation of air-conditioner.
The present invention has flexible operation, cost of manufacture characteristics low, applied widely.
The accompanying drawing explanation
Fig. 1 is the control flow chart of the embodiment of the present invention 1.
Fig. 2 is the structural representation of the embodiment of the present invention 1.
Fig. 3 is the temperature profile of the Te ' of indoor heat exchanger temperature correction value Tc ' while being respectively T1, T2 and T3-Td '.
Fig. 4 is in embodiment 1, the temperature profile of the Te ' of employing-Td '.
Fig. 5 is the control flow chart of the embodiment of the present invention 2.
Fig. 6 is the temperature profile of the Tc '-Td ' in the embodiment of the present invention 3.
In figure: 1 is outdoor heat exchanger, and 2 is indoor heat exchanger, and 3 is compressor, and 4 is throttling arrangement.
The specific embodiment
The invention will be further described below in conjunction with drawings and Examples.
Referring to Fig. 1-Fig. 2, the outdoor system of transducer air conditioning has still been installed compressor exhaust temperature sensor, the delivery temperature of Sampling Compression machine 3 on the blast pipe of compressor 3.Transducer air conditioning as shown in Figure 2, is distinguished mounting temperature sensor on outdoor heat exchanger 1 and indoor heat exchanger 2, and by heat exchange temperature Tc and outdoor heat exchanger temperature T e in sensor sensing chamber.
When air-conditioning system judgement compressor exhaust temperature sensor breaks down, as shown in Figure 1, carry out calculating compressor exhaust temperature according to outdoor heat exchanger temperature T e and indoor heat exchanger temperature T c according to following steps:
Steps A, according to the running frequency fi of detected indoor heat exchanger temperature T c and current compressor, calculate the temperature correction value Tc ' of indoor heat exchanger 2, Tc '=Tc+fi/a+b; Wherein, a is the compressor frequency correction factor, and this correction factor is relevant with efficiency and the air-conditioner of compressor, and the span of a is 5Hz～40Hz; B is the compensating value of indoor heat exchanger temperature, and the span of b is-5 ℃～10 ℃.
Step B, according to detected outdoor heat exchanger temperature T e, the temperature correction value Te ' of counting chamber external heat exchanger 1, Te '=Te+c; Wherein, c is the temperature correction coefficient of outdoor heat exchanger 1, and the span of c is-5 ℃～10 ℃.
Step C, the temperature curve according to the Te ' under the temperature correction value Tc ' that presets corresponding different indoor heat exchangers 2-Td ', calculate corresponding compressor exhaust temperature presumed value Td '; Perhaps, the temperature curve according to the Tc ' under the temperature correction value Te ' that presets corresponding different outdoor heat exchangers 1-Td ', calculate corresponding compressor exhaust temperature presumed value Td '.
As shown in Figure 3, in the air-condition freezing circulatory system, the temperature curve of described Te '-Td ', be that Td ' is along with the change of the temperature correction value Te ' of outdoor heat exchanger 1 reduces greatly when the temperature correction value Tc ' of indoor heat exchanger 2 timing;
Described basis presets the temperature curve of Te ' under the temperature correction value Tc ' of corresponding different indoor heat exchanger 2-Td ', preset Tc '=the 1st temperature T 1, Tc '=the 2nd temperature T 2, Tc '=the 3rd temperature T 3,, Tc '=(m-1) temperature T
M-1, Tc '=m bar curves such as m temperature T m, wherein, the span of m is 3～50;
The curve of described Tc '=the 1st temperature T 1 is divided into n section straight line, and according to the different computing formula of temperature correction value Te ' selection of the current outdoor heat exchanger 1 of air-conditioner, wherein, the span of n is 3～50;
As Te '<Te
1The time, Td '=Td
1
Work as Te
1≤ Te '<Te
2The time, Td '=(Td
2-Td
1) * (Te '-Td
1)/(Td
2-Td
1)+Td
1
Work as Te
2≤ Te '<Te
3The time, Td '=(Td
3-Td
2) * (Te '-Td
2)/(Td
3-Td
2)+Td
2
Work as Te
3≤ Te '<Te
4The time, Td '=(Td
4-Td
3) * (Te '-Td
3)/(Td
4-Td
3)+Td
3
……；
Work as Te
(n-2)≤ Te '<Te
(n-1)The time,
Td′＝（Td
（n-1）-Td
（n-
2））×（Te′-Td
（n-2））/（Td
（n-1）-Td
（n-2））+Td
（n-2）；
Work as Te
(n-1)≤ Te '<Te
nThe time,
Td′＝（Td
n-Td
（n-1））×（Te′-Td
（n-1））/（Td
n-Td
（n-1））+Td
（n-1）；
Work as Te
nDuring≤Te ', Td '=Td
n
Wherein, Te
1<Te
2<Te
3<...<Te
N-2<Te
N-1<Te
n
Te
1, Te
2, Te
3..., Te
N-2, Te
N-1, Te
nSpan separately is-50 ℃～100 ℃;
Td
1, Td
2, Td
3, Td
4..., Td
N-2, Td
N-1, Td
n5 ℃～100 ℃ of sampling scopes separately;
Based on identical reason,
The curve of described Tc '=the 2nd temperature T 2 is divided into p section straight line,
Tc '=the 3rd temperature T 3 curves are divided into q section straight line,
Tc '=(n-1) temperature T
N-1Curve be divided into r section straight line,
Tc '=n temperature T
nCurve be divided into s section straight line,
The different computing formula of temperature correction value Te ' selection of the outdoor heat exchanger current according to air-conditioner (1), the computing formula of the curve of this computing formula and above-mentioned Tc '=the 1st temperature T 1 is similar, just no longer is described further here, wherein, p, q, r, the span of s is 3～50;
Calculate corresponding compressor exhaust temperature presumed value Td ' time,
The temperature correction value Tc ' of the indoor heat exchanger (2) that at first, will be calculated by steps A and predefined the 1st temperature T the 1, the 2nd temperature T the 2, the 3rd temperature T 3 ..., the m-2 temperature T
M-2, the m-1 temperature T
M-1With the n temperature T
mBig or small, determine the interval at Tc ' place,
When T1<Tc '<T2, the interval at Tc ' place is [T1, T2], selects the curve of Tc '=the 1st temperature T 1 and the curve of Tc '=the 2nd temperature T 2,
Secondly, then the size of the temperature correction value Te ' of the outdoor heat exchanger (1) calculated by step B, from above computing formula, selecting corresponding computing formula; According to this computing formula of selecting, calculate again the Td ' 1 of compressor exhaust temperature of the curve of Tc '=the 1st temperature T 1, and the second reckoning value Td ' 2 of the curve compressor exhaust temperature of Tc '=the 2nd temperature T 2;
Afterwards, then calculate compressor exhaust temperature presumed value Td ', Td '=(Td ' 2-Td ' 1) * (Tc '-T1)/(T2-T1)+Td ' 1,
Based on identical reason, during in other temperature ranges, also according to above similar computational methods, calculate compressor exhaust temperature presumed value Td ' as Tc ';
In the air-condition freezing circulation, the temperature curve of described Tc '-Td ', for working as Te ' regularly, Td ' is along with the change of Tc ' becomes large greatly; Its concrete calculating is finished the work with the curve of above-mentioned Te '-Td ' is similarly, is also equivalence fully.
The curve of described Te '-Td ', for the correction value Tc ' timing when the indoor heat exchanger temperature, compressor exhaust temperature presumed value Td ' is along with the change of Te ' reduces greatly, predefined temperature curve has from small to large according to the correction value Tc ' of indoor heat exchanger temperature, Tc '=T1, Tc '=T2, Tc '=tri-of T3 temperature curve, described according to the corresponding delivery temperature value Td ' of the curve calculation of predefined Te '-Td ' finish the work for, at first according to steps A, calculate the value of the indoor heat exchanger temperature correction value Tc ' of current system, and with predefined T1, T2, the T3 value is big or small, determine the interval at its place, if T1<Tc '<T2, the interval of determining the indoor heat exchanger temperature correction value Tc ' place of current system is [T1, T2], according to step B, calculate the outdoor heat exchange actuator temperature correction value Te ' of current system=Te ' 1 and then, according to the indoor heat exchanger temperature correction value Tc ' of current system at [T1, T2] interval, at curve map as shown in Figure 3, calculate the compressor exhaust temperature reckoning value Td ' 1 of the correction value Tc ' of indoor heat exchanger temperature=T1 and outdoor heat exchange actuator temperature correction value Te '=Te ' 1 o'clock and compressor exhaust temperature reckoning value Td ' 2 during as the correction value Tc ' of indoor heat exchanger temperature=T2 and outdoor heat exchange actuator temperature correction value Te '=Te ' 1, afterwards, again according to the correction value Tc ' of current system indoor heat exchanger temperature, according to following Linearity Formula draw compressor exhaust temperature reckoning value Td '=(Td ' 2-Td ' 1) of current system * (Tc '-T1)/(T2-T1)+Td ' 1.
Step D, according to the compressor exhaust temperature presumed value Td ' that step C calculates, calculate current compressor exhaust temperature value Td, Td=Td '+d; Wherein, d is that delivery temperature is calculated compensating value, and the span of d is 0～20 ℃.
Below in conjunction with model, be that 35 the Actual-Temperature-Points of transducer air conditioning when heating mode is described in detail the control method of calculating compressor exhaust temperature.When the current running frequency of compressor is fi=60hz, current indoor heat exchanger temperature T c is 41 ℃, outdoor heat exchanger temperature T e is-9 ℃, the default 10hz that is decided to be of compressor frequency correction factor a, the compensating value b of indoor heat exchanger temperature is 0, the temperature correction coefficient c of outdoor heat exchanger 1 is-2, delivery temperature calculates that compensating value d is 5 ℃. judge that at first system is whether in a period of time t1 that compressor is opened, perhaps when the air conditioner heat-production defrost moves or defrost while finishing in a period of time t2, if do not meet, just carry out compressor exhaust temperature and calculate control, secondly according to formula, calculate Tc '=Tc+fi/a+b=41+60/10+0=47 ℃, again calculate Te '=Te+c=-9+(-2)=-11 ℃,
As shown in Figure 4, the curve that presets Te '-Td ' has Tc '=20 ℃, 40 ℃, 50 ℃, 60 ℃, 80 ℃ of totally five Te '-Td ' temperature curves, thereby determine that the Tc ' of current system is in 40～50 temperature ranges, while by current Te '=-11 ℃ computation of table lookup, drawing Tc '=40 ℃ again, corresponding temperature spot is Td ' 1=78 ℃, during Tc '=50 ℃, corresponding temperature spot is Td ' 2=93 ℃, according to Linearity Formula Td '=(Td ' 2-Td ' 1) * (Tc '-T1)/(T2-T1)+Td ' 1=(93-78) * (47-40)/(50-40)+78=88.5 ℃, finally carry out again delivery temperature reckoning value correction Td=Td '+d=88.5+5=93.5 ℃.
As mentioned above; this transducer air conditioning has adopted the control method according to indoor heat exchanger temperature and outdoor heat exchange actuator temperature reckoning compressor exhaust temperature; after can breaking down at the exhaust gas temperature sensor of air-conditioner; still can carry out according to the reckoning value of delivery temperature the estimation of system loading size; limit frequency or stoppage protection; the safe operation of assurance system maximal efficiency, and process without after sensor fault occurring, doing to shut down.
The difference of the control method of the present embodiment and embodiment 1 air-conditioner is, as shown in the flow chart of Fig. 5, the transducer air conditioning of this embodiment is owing to can running high frequency, so increased step D1, carry out compressor high frequency running correction, if when high frequency turn round, also need to increase compressor high frequency running correction Td=Td '+d+k * (fi-fb) when the current compressor of judgement; Fi is the running frequency of current compressor, and fb is a reference value of the high frequency frequency of moving of compressor, and the span of fb is 70Hz～150Hz, and k is the high frequency running correction factor of compressor, and the span of k is 0.05～0.3.
Judgement: as the current running frequency fi of compressor > during fb, carry out the running of compressor high frequency and revise, otherwise do not carry out the running of compressor high frequency, revise; The detailed control method of other calculating and embodiment mono-are similar, no longer are further described.
As mentioned above; this transducer air conditioning is when high frequency turns round; according to indoor heat exchanger temperature and outdoor heat exchange actuator temperature, calculate that the control method of the delivery temperature of compressor has increased the running of compressor high frequency and revised; make compressor when running high frequency; the delivery temperature value of calculating out is more accurate, can better carry out the compressor limit frequently or stoppage protection.
The air-conditioner of the present embodiment is different from the air-conditioner of above each embodiment to be, it adopts the control method according to the delivery temperature of evaporator temperature and outdoor heat exchange actuator temperature reckoning compressor, relatively reckoning compressor exhaust temperature out and the temperature value comparison of exhaust gas temperature sensor sampling, when these two temperature value deviation ratios are larger, judgement compressor exhaust temperature sensor comes off or fault, this embodiment adopts step and the embodiment mono-of the control method of calculating compressor exhaust temperature similar, just the computational methods in step C have adopted the curve of the Tc ' that presets under corresponding different Te '-Td ', calculate corresponding compressor exhaust temperature reckoning value Td ', as shown in the Tc ' of Fig. 6-Td ' temperature curve schematic diagram, when the correction value Te ' of outdoor heat exchange actuator temperature mono-timing, compressor exhaust temperature presumed value Td ' is along with the change of Tc ' becomes large greatly, predefined temperature curve has from small to large according to the correction value Te ' of outdoor heat exchange actuator temperature, Te '=T4, Te '=T5, Te '=tri-of T6 temperature curve, at first according to the outdoor heat exchange actuator temperature correction value Te ' value of step current system that B calculates, and with predefined T3, T4, the T5 value is big or small, determines the interval at its place, if T4<Te '<T5, the interval of determining the indoor heat exchanger temperature correction value Te ' place of current system is [T4, T5], according to steps A, calculate the indoor heat exchanger temperature correction value Tc ' of current system=Tc ' 1 and then, compressor exhaust temperature reckoning value Td ' 4 during the compressor exhaust temperature reckoning value Td ' 3 when the Tc ' as Fig. 6-Td ' temperature curve schematic diagram calculates the correction value Tc ' of correction value Te ' when the outdoor heat exchange actuator temperature=T4 and indoor heat exchanger temperature=Tc ' 1 and when the correction value Tc ' of indoor heat exchanger temperature=Tc ' 1 and the correction value Te ' of outdoor heat exchange actuator temperature=T5, afterwards again according to current Te ', according to following Linearity Formula draw compressor exhaust temperature reckoning value Td '=(Td ' 4-Td ' 3) of current system * (Te '-T4)/(T5-T4)+Td ' 3,
As mentioned above, the present embodiment adopts the control method according to the delivery temperature of indoor heat exchanger temperature and outdoor heat exchange actuator temperature reckoning compressor, can be good at judging whether the compressor exhaust temperature sensor comes off or fault, further adopt again the compressor exhaust temperature value of calculating carry out the system limit frequently or stop controlling, and electronic expansion valve opening is controlled.
The above embodiment is only the preferred embodiments of the present invention, is not limited to the present embodiment, says for those skilled in the art, and the present invention can have various modifications and variations.All any modifications of doing within the spirit and principles in the present invention, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (5)
1. control method of calculating the compressor exhaust temperature of air-conditioner, it is characterized in that at outdoor heat exchanger (1) and the upper mounting temperature sensor respectively of indoor heat exchanger (2), by the external heat exchanger temperature T e of temperature sensor sensing chamber and indoor heat exchanger temperature T c;
The concrete steps of calculating compressor exhaust temperature comprise:
Steps A, according to the running frequency fi of detected indoor heat exchanger temperature T c and current compressor, calculate the temperature correction value Tc ' of indoor heat exchanger (2), Tc '=Tc+fi/a+b; Wherein, a is the compressor frequency correction factor, and the span of a is 5Hz～40Hz, and b is the compensating value of indoor heat exchanger temperature, and the span of b is-5 ℃～10 ℃;
Step B, according to detected outdoor heat exchanger temperature T e, the temperature correction value Te ' of counting chamber external heat exchanger (1), Te '=Te+c; Wherein, c is the temperature correction coefficient of outdoor heat exchanger (1), and the span of c is-5 ℃～10 ℃;
Step C, the temperature curve according to the Te ' under the temperature correction value Tc ' that presets corresponding different indoor heat exchangers (2)-Td ', calculate corresponding compressor exhaust temperature presumed value Td ';
Perhaps, the temperature curve according to the Tc ' under the temperature correction value Te ' that presets corresponding different outdoor heat exchangers (1)-Td ', calculate corresponding compressor exhaust temperature presumed value Td ';
Step D, according to the compressor exhaust temperature presumed value Td ' that step C calculates, calculate current compressor exhaust temperature value Td, Td=Td '+d; Wherein, d is that delivery temperature is calculated compensating value, and the span of d is 0～20 ℃.
2. the control method of the compressor exhaust temperature of reckoning air-conditioner according to claim 1, the concrete steps that it is characterized in that described reckoning compressor exhaust temperature also comprise the step D1 be positioned at after step D,
Step D1, if current compressor when high frequency turns round, also needs to increase compressor high frequency running correction, i.e. current compressor exhaust temperature value Td=Td '+d+k * (fi-fb); Wherein, fi is the running frequency of current compressor, and fb is a reference value of the high frequency frequency of moving of compressor, and the span of fb is 70Hz～150Hz, and k is the high frequency running correction factor of compressor, and the span of k is 0.05～0.3.
3. the control method of the compressor exhaust temperature of reckoning air-conditioner according to claim 1, it is characterized in that in step C, the temperature curve of described Te '-Td ', for the temperature correction value Tc ' timing when indoor heat exchanger (2), Td ' is along with the change of the temperature correction value Te ' of outdoor heat exchanger (1) reduces greatly;
Described basis presets the temperature curve of Te ' under the temperature correction value Tc ' of corresponding different indoor heat exchanger (2)-Td ', preset Tc '=the 1st temperature T 1, Tc '=the 2nd temperature T 2, Tc '=the 3rd temperature T 3,, Tc '=(m-1) temperature T
M-1, Tc '=m bar curves such as m temperature T m, wherein, the span of m is 3～50;
The curve of described Tc '=the 1st temperature T 1 is divided into n section straight line, the different computing formula of temperature correction value Te ' selection of the outdoor heat exchanger current according to air-conditioner (1), and wherein, the span of n is 3～50;
As Te '<Te
1The time, Td '=Td
1
Work as Te
1≤ Te '<Te
2The time, Td '=(Td
2-Td
1) * (Te '-Td
1)/(Td
2-Td
1)+Td
1
Work as Te
2≤ Te '<Te
3The time, Td '=(Td
3-Td
2) * (Te '-Td
2)/(Td
3-Td
2)+Td
2
Work as Te
3≤ Te '<Te
4The time, Td '=(Td
4-Td
3) * (Te '-Td
3)/(Td
4-Td
3)+Td
3
……；
Work as Te
(n-2)≤ Te '<Te
(n-1)The time,
Td′＝（Td
（n-1）-Td
（n-2））×（Te′-Td
（n-2））/（Td（
n-1）-Td
（n-2））+Td
（n-2）；
Work as Te
(n-1)≤Te '<Te
nThe time,
Td′＝（Td
n-Td
（n-1））×（Te′-Td
（n-1））/（Td
n-Td
（n-1））+Td
（n-1）；
Work as Te
nDuring≤Te ', Td '=Td
n
Wherein, Te
1<Te
2<Te
3<...<Te
N-2<Te
N-1<Te
n
Te
1, Te
2, Te
3..., Te
N-2, Te
N-1, Te
nSpan separately is-50 ℃～100 ℃;
Td
1, Td
2, Td
3, Td
4..., Td
N-2, Td
N-1, Td
n5 ℃～100 ℃ of sampling scopes separately;
Based on identical reason,
The curve of described Tc '=the 2nd temperature T 2 is divided into p section straight line,
Tc '=the 3rd temperature T 3 curves are divided into q section straight line,
Tc '=(n-1) temperature T
N-1Curve be divided into r section straight line,
Tc '=n temperature T
nCurve be divided into s section straight line,
The different computing formula of temperature correction value Te ' selection of the outdoor heat exchanger current according to air-conditioner (1), the computing formula of the curve of this computing formula and above-mentioned Tc '=the 1st temperature T 1 is similar, just no longer is described further here, wherein, p, q, r, the span of s is 3～50;
Calculate corresponding compressor exhaust temperature presumed value Td ' time,
The temperature correction value Tc ' of the indoor heat exchanger (2) that at first, will be calculated by steps A and predefined the 1st temperature T the 1, the 2nd temperature T the 2, the 3rd temperature T 3 ..., the m-2 temperature T
M-2, the m-1 temperature T
M-1With the n temperature T
mBig or small, determine the interval at Tc ' place,
When T1<Tc '<T2, the interval at Tc ' place is [T1, T2], selects the curve of Tc '=the 1st temperature T 1 and the curve of Tc '=the 2nd temperature T 2,
Secondly, then the size of the temperature correction value Te ' of the outdoor heat exchanger (1) calculated by step B, from above computing formula, selecting corresponding computing formula; According to this computing formula of selecting, calculate again the Td ' 1 of compressor exhaust temperature of the curve of Tc '=the 1st temperature T 1, and the second reckoning value Td ' 2 of the curve compressor exhaust temperature of Tc '=the 2nd temperature T 2;
Afterwards, then calculate compressor exhaust temperature presumed value Td ', Td '=(Td ' 2-Td ' 1) * (Tc '-T1)/(T2-T1)+Td ' 1,
Based on identical reason, during in other temperature ranges, also according to above similar computational methods, calculate compressor exhaust temperature presumed value Td ' as Tc ';
In the air-condition freezing circulation, the temperature curve of described Tc '-Td ', for working as Te ' regularly, Td ' is along with the change of Tc ' becomes large greatly; Its concrete calculating is finished the work with the curve of above-mentioned Te '-Td ' is similarly, is also equivalence fully.
4. the control method of the compressor exhaust temperature of reckoning air-conditioner according to claim 1, is characterized in that forbidding carrying out the compressor exhaust temperature reckoning in a period of time t1 that compressor is opened, and the span of t1 is 30s～600s.
5. the control method of the compressor exhaust temperature of reckoning air-conditioner according to claim 1, it is characterized in that when the air conditioner heat-production defrost moves or defrost forbids carrying out the compressor exhaust temperature reckoning in a period of time t2 while finishing, the span of t2 is 30s～600s.
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| CN113048618B (en) * | 2021-04-25 | 2022-05-13 | 宁波奥克斯电气股份有限公司 | Exhaust temperature obtaining method and device, electronic equipment and air conditioner |
| CN113790511A (en) * | 2021-09-09 | 2021-12-14 | 珠海格力电器股份有限公司 | Rapid detection method and device for outdoor exhaust temperature sensing bulb fault |
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