CN112032935A - Control method for fluorine-lacking protection of air conditioner, air conditioner and storage medium - Google Patents
Control method for fluorine-lacking protection of air conditioner, air conditioner and storage medium Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 31
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims abstract description 55
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 55
- 239000011737 fluorine Substances 0.000 claims abstract description 55
- 230000007812 deficiency Effects 0.000 claims abstract description 27
- 238000004364 calculation method Methods 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 5
- 238000004590 computer program Methods 0.000 claims description 3
- 239000003507 refrigerant Substances 0.000 abstract description 20
- 230000002950 deficient Effects 0.000 description 18
- 239000007789 gas Substances 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/52—Indication arrangements, e.g. displays
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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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
- F24F2110/12—Temperature of the outside air
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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Abstract
The invention provides a control method for fluorine deficiency protection of an air conditioner, the air conditioner and a storage medium, wherein the control method comprises the following steps: determining normal exhaust temperature according to the indoor environment temperature, the indoor heat exchanger tube temperature, the outdoor environment temperature and the outdoor heat exchanger tube temperature; and acquiring actual exhaust temperature, judging the magnitude relation between the normal exhaust temperature and the actual exhaust temperature, and performing fluorine-lacking protection if the judgment result meets the preset condition. The invention determines the normal exhaust temperature through the indoor environment temperature, the pipe temperature of the indoor heat exchanger, the outdoor environment temperature and the pipe temperature of the outdoor heat exchanger, increases the judgment condition of the exhaust temperature, considers the influence factors brought by the running of the air conditioner through the pipe temperature of the indoor heat exchanger and the pipe temperature of the outdoor heat exchanger, compares the normal exhaust temperature with the actual exhaust temperature, judges whether the refrigerant in the air conditioner is insufficient according to the difference of the temperatures when the refrigerant is insufficient and the difference of the exhaust temperatures, and improves the accuracy of the fluorine deficiency protection of the air conditioner.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method for fluorine-deficient protection of an air conditioner, the air conditioner and a storage medium.
Background
The air conditioner has poor refrigerating and heating effects under the condition of insufficient refrigerant, and if the air conditioner runs for a long time, the compressor is still in a high-temperature running state for a long time, so that the service life of the compressor is greatly shortened, and the compressor can be even damaged in severe cases. Therefore, fluorine-deficient protection of the air conditioner is very important.
The existing fluorine-lacking protection technology controls whether to start fluorine-lacking protection or not by comparing the temperature of a pipe before starting, the temperature of the pipe during operation and the ambient temperature, and when the difference value delta T1 between the temperature of the pipe during operation and the temperature difference value delta T2 between the temperature of the pipe during operation and the temperature of the pipe before starting is smaller than a certain set value, the air conditioner performs fluorine-lacking protection.
However, in the existing fluorine-deficient protection technology, under a high-wind-level and high-humidity environment, the difference value Δ T1 between the running pipe temperature and the environment temperature and the temperature difference value Δ T2 between the running pipe temperature and the pipe temperature before starting are smaller, and in order to avoid the phenomenon of error protection, the values of Δ T1 and Δ T2 are often very small; under the environment of low wind level and low humidity, the difference value delta T1 between the running pipe temperature and the environment temperature and the difference value delta T2 between the running pipe temperature and the pipe temperature before starting are larger, and at this time, even if the refrigerant in the air conditioner is insufficient, the air conditioner cannot be protected in time. That is to say, the existing air conditioner fluorine deficiency protection mode has low accuracy.
Therefore, the prior art has defects and needs to be improved and developed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a control method for fluorine-deficient protection of an air conditioner, the air conditioner and a storage medium, and aims to solve the problem that the accuracy of a fluorine-deficient protection mode of the air conditioner in the prior art is low.
The technical scheme adopted by the invention for solving the technical problem is as follows:
a control method for fluorine-lacking protection of an air conditioner comprises the following steps:
determining normal exhaust temperature according to the indoor environment temperature, the indoor heat exchanger tube temperature, the outdoor environment temperature and the outdoor heat exchanger tube temperature;
and acquiring actual exhaust temperature, judging the magnitude relation between the normal exhaust temperature and the actual exhaust temperature, and performing fluorine-lacking protection if the judgment result meets the preset condition.
In further implementations, the step of determining a normal discharge temperature based on the indoor ambient temperature, the indoor heat exchanger tube temperature, the outdoor ambient temperature, and the outdoor heat exchanger tube temperature is preceded by:
when the starting operation time of the air conditioner reaches a preset time range, the current indoor environment temperature, the pipe temperature of the indoor heat exchanger, the outdoor environment temperature and the pipe temperature of the outdoor heat exchanger of the air conditioner are obtained.
In a further implementation manner, the step of determining the normal exhaust temperature according to the indoor environment temperature, the indoor heat exchanger tube temperature, the outdoor environment temperature, and the outdoor heat exchanger tube temperature specifically includes:
judging whether the difference between the indoor environment temperature and the pipe temperature of the indoor heat exchanger is within a first preset range or not and whether the difference between the outdoor environment temperature and the pipe temperature of the outdoor heat exchanger is within a second preset range or not;
and if the difference between the indoor environment temperature and the pipe temperature of the indoor heat exchanger is within a first preset range and the difference between the outdoor environment temperature and the pipe temperature of the outdoor heat exchanger is within a second preset range, calculating the normal exhaust temperature according to the pipe temperature of the indoor heat exchanger and the pipe temperature of the outdoor heat exchanger.
In a further implementation manner, the calculation formula for calculating the normal exhaust temperature according to the indoor heat exchanger tube temperature and the outdoor heat exchanger tube temperature is as follows: t is3＝A*T1+B*T2+C；
Wherein, T3Is the normal exhaust temperature, T1Is the tube temperature, T, of the outdoor heat exchanger2Is the tube temperature of the indoor heat exchanger; A. b and C are fitting coefficients for normal exhaust temperatures.
In a further implementation manner, the obtaining of the actual exhaust temperature, determining a magnitude relationship between the normal exhaust temperature and the actual exhaust temperature, and if a determination result meets a preset condition, performing fluorine-deficient protection specifically includes:
detecting the current actual exhaust temperature of the air conditioner, and judging the magnitude relation between the normal exhaust temperature and the actual exhaust temperature;
and if the normal exhaust temperature is higher than the actual exhaust temperature, and the difference between the normal exhaust temperature and the actual exhaust temperature is greater than the preset fluorine-lacking exhaust temperature difference, performing fluorine-lacking protection.
Further, the step of performing fluorine-deficient protection specifically comprises:
controlling the air conditioner to stop and/or sending out a fluorine lack prompt message.
In further implementations, the fitting coefficients A, B and C for the normal discharge air temperature are first fitting coefficients when the outdoor ambient temperature is within a first temperature range;
the fitting coefficients A, B and C for the normal discharge air temperature are second fitting coefficients when the outdoor ambient temperature is within a second temperature range.
In a further implementation manner, the step of determining whether the difference between the indoor ambient temperature and the temperature of the indoor heat exchanger tube is within a first preset range, and whether the difference between the outdoor ambient temperature and the temperature of the outdoor heat exchanger tube is within a second preset range further includes:
and if the difference between the indoor environment temperature and the pipe temperature of the indoor heat exchanger is not in a first preset range and/or the difference between the outdoor environment temperature and the pipe temperature of the outdoor heat exchanger is not in a second preset range, controlling the air conditioner to normally operate and quitting the fluorine-lacking protection monitoring.
The invention provides an air conditioner, which comprises a memory, a processor and a control program of fluorine-deficient protection of the air conditioner, wherein the control program of the fluorine-deficient protection of the air conditioner is stored on the memory and can be operated on the processor, and the steps of the control method of the fluorine-deficient protection of the air conditioner are realized when the control program of the fluorine-deficient protection of the air conditioner is executed by the processor.
The present invention provides a storage medium, wherein the storage medium stores a computer program executable for implementing the steps of the control method for fluorine deficiency protection of an air conditioner as described above.
The invention provides a control method for fluorine deficiency protection of an air conditioner, the air conditioner and a storage medium, wherein the control method comprises the following steps: determining normal exhaust temperature according to the indoor environment temperature, the indoor heat exchanger tube temperature, the outdoor environment temperature and the outdoor heat exchanger tube temperature; and acquiring actual exhaust temperature, judging the magnitude relation between the normal exhaust temperature and the actual exhaust temperature, and performing fluorine-lacking protection if the judgment result meets the preset condition. The invention determines the normal exhaust temperature through the indoor environment temperature, the pipe temperature of the indoor heat exchanger, the outdoor environment temperature and the pipe temperature of the outdoor heat exchanger, increases the judgment condition of the exhaust temperature, not only considers the influence factors brought by the running of the air conditioner through the pipe temperature of the indoor heat exchanger and the pipe temperature of the outdoor heat exchanger, but also compares the normal exhaust temperature with the actual exhaust temperature, judges whether the refrigerant in the air conditioner is insufficient according to the difference of the temperatures when the refrigerant is insufficient and the difference of the exhaust temperatures, avoids the condition of error protection or untimely protection, and improves the accuracy of fluorine-lacking protection of the air conditioner.
Drawings
Fig. 1 is a flow chart of a preferred embodiment of the control method for fluorine deficiency protection of an air conditioner in the present invention.
FIG. 2 is a graph of temperature values and difference in exhaust gas for different amounts of fluorine.
Fig. 3 is a detailed flowchart of a control method for fluorine deficiency protection of an air conditioner according to a preferred embodiment of the present invention.
Fig. 4 is a functional block diagram of a preferred embodiment of the air conditioner of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a flow chart illustrating a control method for fluorine deficiency protection of an air conditioner according to the present invention. As shown in fig. 1, the method for controlling fluorine deficiency protection of an air conditioner according to an embodiment of the present invention includes the following steps:
s100, determining normal exhaust temperature according to the indoor environment temperature, the indoor heat exchanger tube temperature, the outdoor environment temperature and the outdoor heat exchanger tube temperature.
In one implementation, the step S100 further includes, before the step S:
and S10, when the starting operation time of the air conditioner reaches a preset time range, acquiring the current indoor environment temperature, the indoor heat exchanger tube temperature, the outdoor environment temperature and the outdoor heat exchanger tube temperature of the air conditioner.
Specifically, after the air conditioner is started and operated for a period of time, the temperature of the indoor heat exchanger tube, the temperature of the outdoor heat exchanger tube, and the exhaust temperature tend to be stable, and therefore, the temperature of the indoor heat exchanger tube, the temperature of the outdoor heat exchanger tube, and the exhaust temperature cannot be detected immediately after the air conditioner is started. However, the long-term operation of the air conditioner under the condition of insufficient refrigerant can lead to the compressor being in a high-temperature operation state for a long time, thereby greatly shortening the service life of the compressor and even possibly damaging the compressor in severe cases. Therefore, the operation time after the boot cannot be too long. After the air conditioner is started for a preset time, the fluorine-lacking protection monitoring is started, namely, the temperature of the indoor heat exchanger tube, the temperature of the outdoor heat exchanger tube and the exhaust temperature are detected. In one implementation, the predetermined time range may be 4 to 12 minutes; specifically, it may be set to 8 min.
The step S100 specifically includes:
s110, judging whether the difference between the indoor environment temperature and the indoor heat exchanger tube temperature is within a first preset range or not and whether the difference between the outdoor environment temperature and the outdoor heat exchanger tube temperature is within a second preset range or not;
and S120a, if the difference between the indoor environment temperature and the indoor heat exchanger tube temperature is within a first preset range, and the difference between the outdoor environment temperature and the outdoor heat exchanger tube temperature is within a second preset range, calculating the normal exhaust temperature according to the indoor heat exchanger tube temperature and the outdoor heat exchanger tube temperature.
In particular, the indoor ambient temperature T4Pipe temperature T of indoor heat exchanger2The difference between them is | T4-T2L, outdoor ambient temperature T5Pipe temperature T of outdoor heat exchanger1The difference between is | T5-T1L. When the air conditioner runs under the condition of insufficient refrigerant, the refrigerating and heating effects are poor, and basically no refrigerating capacity or heating capacity exists, namely, | T4-T2I and I T5-T1All will be small. Therefore, the first preset range is smaller than a first preset threshold, and the second preset range is smaller than a second preset threshold. In one implementation, the first preset threshold Δ T1At 5 deg.C, a second predetermined threshold value DeltaT2Is 5 ℃. Thus, when | T4-T2|＜△T1And | T5-T1|＜△T2When the air conditioner is in operation, the air conditioner basically has no refrigerating capacity or heating capacity and operates under the condition of insufficient refrigerant.
Further, after the step S110, the method further includes:
s120b, if the difference between the indoor environment temperature and the indoor heat exchanger tube temperature is not in a first preset range, and/or the difference between the outdoor environment temperature and the outdoor heat exchanger tube temperature is not in a second preset range, controlling the air conditioner to normally operate, and quitting the fluorine-lacking protection monitoring.
Specifically, for two conditions: the difference between the indoor environment temperature and the pipe temperature of the indoor heat exchanger is in a first preset range, and the difference between the outdoor environment temperature and the pipe temperature of the outdoor heat exchanger is in a second preset range; only byIf one of the conditions is not satisfied, it cannot be determined that the refrigerant is insufficient. That is, when | T is detected4-T2|≥△T1And/or | T5-T1|≥△T2When, i.e., T is detected4-T2I and/or I T5-T1If | is larger, it indicates that the air conditioner has sufficient refrigerant and can normally operate without detecting whether fluorine is lacking.
Further, the invention can prevent error protection when the | T is satisfied4-T2|＜△T1And | T5-T1|＜△T2After the conditions are met, the temperature of the indoor heat exchanger tube T is further determined2Tube temperature T of outdoor heat exchanger1Calculating the normal exhaust temperature T3. Because the running frequency, the wind level, the ambient temperature and the humidity of the air conditioner all influence the running state of the air conditioning system, and the influence of the factors can be reflected on the temperature of the indoor heat exchanger tube and the temperature of the outdoor heat exchanger tube, the normal exhaust temperature T is calculated according to the indoor ambient temperature, the temperature of the indoor heat exchanger tube, the temperature of the outdoor ambient temperature and the temperature of the outdoor heat exchanger tube3The exhaust temperature of the system in the normal refrigerant quantity state can be reflected more truly, and whether the system is lack of fluorine is judged by comparing the actual exhaust temperature with the calculated normal exhaust temperature difference. The actual exhaust temperature may be detected by providing a temperature probe at the compressor discharge of the air conditioner. Specifically, the calculation formula for calculating the normal exhaust temperature according to the temperature of the indoor heat exchanger tube and the temperature of the outdoor heat exchanger tube is as follows: t is3＝A*T1+B*T2+ C; wherein, T3Is the normal exhaust temperature, T1Is the tube temperature, T, of the outdoor heat exchanger2Is the tube temperature of the indoor heat exchanger; A. b and C are fitting coefficients for normal exhaust temperatures. Wherein, the value of A, B, C can be set according to a large number of tests for verification, so as to further improve the accuracy of fluorine-deficient protection.
In one implementation, the fitting coefficients A, B and C for the normal discharge air temperature are first fitting coefficients when the outdoor ambient temperature is within a first temperature range; a fit of the normal exhaust temperature when the outdoor ambient temperature is within a second temperature rangeCoefficients A, B and C are the second fitting coefficients. Since the outdoor environment temperature is an important influence factor of the operation of the air conditioner, the values of A, B and C are different when the air conditioner faces different outdoor environment temperatures. Specifically, when the outdoor environment temperature is higher (for example, greater than a certain temperature threshold), the normal exhaust temperature of the air conditioner is higher, and when the outdoor environment temperature is lower (for example, less than or equal to a certain temperature threshold), the normal exhaust temperature of the air conditioner is lower. For example, when the outdoor ambient temperature is greater than 25 ℃, the calculation formula for calculating the normal discharge temperature from the indoor heat exchanger tube temperature and the outdoor heat exchanger tube temperature is: t is3＝1.4*T1+(-0.84)*T2+ 25; that is, when the outdoor ambient temperature is greater than 25 ℃, a is 1.4, B is-0.84, and C is 25. When the outdoor environment temperature is less than or equal to 25 ℃, the calculation formula for calculating the normal exhaust temperature according to the indoor heat exchanger tube temperature and the outdoor heat exchanger tube temperature is as follows: t is3＝1.15*T1+(-0.95)*T2+ 15; that is, when the outdoor ambient temperature is less than or equal to 25 ℃, a ═ 1.15, B ═ 0.95, and C ═ 15.
The step S100 is followed by: s200, acquiring actual exhaust temperature, judging the magnitude relation between the normal exhaust temperature and the actual exhaust temperature, and if the judgment result meets the preset condition, performing fluorine-lacking protection.
When the air conditioner runs in a fluorine-deficient state, the quantity of refrigerants in an evaporator pipeline is insufficient, the refrigerants continue to be overheated after being evaporated quickly, but the refrigerants at the outlet of the evaporator are in a state of high superheat degree, and the suction temperature of the compressor is increased, so that the exhaust temperature of the compressor is increased. Therefore, the air conditioner runs in a fluorine-lacking state, the exhaust temperature is high, and therefore whether the system lacks fluorine can be judged by comparing the difference value between the actual exhaust temperature and the normal exhaust temperature.
In one implementation, the step S200 specifically includes:
s210, detecting the current actual exhaust temperature of the air conditioner, and judging the magnitude relation between the normal exhaust temperature and the actual exhaust temperature;
s220, if the normal exhaust temperature is higher than the actual exhaust temperature, and the difference between the normal exhaust temperature and the actual exhaust temperature is larger than a preset fluorine-lacking exhaust temperature difference, fluorine-lacking protection is carried out.
That is, the predetermined condition is that the normal exhaust temperature is higher than the actual exhaust temperature, and the difference between the normal exhaust temperature and the actual exhaust temperature is greater than the predetermined fluorine-deficient exhaust temperature difference. If the preset condition is not met, namely, if the normal exhaust temperature is not higher than the actual exhaust temperature and/or the difference between the normal exhaust temperature and the actual exhaust temperature is not larger than the preset fluorine-lacking exhaust temperature difference, the fluorine-lacking protection is not carried out.
Specifically, please refer to the table in fig. 2, which takes the cooling mode as an example, and the difference between the normal discharge temperature and the actual discharge temperature is different for different refrigerant contents. The value corresponding to the fluorine amount in the table represents the refrigerant amount; the working condition is the ambient temperature, the value of the inner indicates the indoor ambient temperature, and the value of the outer indicates the outdoor ambient temperature; 8min is the operation time of the air conditioner, namely, each temperature value is obtained by measurement and calculation when the air conditioner operates for 8 min; the value of frequency refers to the compressor operating frequency; actually measuring the corresponding value of the exhaust gas refers to the measured actual exhaust gas temperature; the value corresponding to the inner ring is the measured indoor environment temperature; the value corresponding to the inner pipe is the measured temperature of the indoor heat exchanger pipe, and the value corresponding to the outer ring is the measured outdoor environment temperature; the value corresponding to the outer pipe is the measured temperature of the outdoor heat exchanger pipe; calculating the value corresponding to the exhaust gas refers to the normal exhaust temperature calculated according to a formula; the value corresponding to "measured exhaust-calculated exhaust" refers to the difference between the normal exhaust temperature and the actual exhaust temperature. According to the invention, the exhaust temperature judgment condition is increased, and the difference value can be set to be relatively large, so that the fluorine-lacking protection can be carried out in time when 40-60% of refrigerant is lacking, and the error protection risk does not exist.
In one implementation, the predetermined fluorine deficient exhaust temperature differential may be set to 30 ℃.
Further, the step S220 of performing fluorine deficiency protection specifically includes: controlling the air conditioner to stop and/or sending out a fluorine lack prompt message. That is to say, when fluorine-deficient protection is performed, only the air conditioner can be controlled to stop, only the fluorine-deficient prompt message can be sent out, and the air conditioner can be controlled to stop and also be controlled to send out the fluorine-deficient prompt message.
Referring to fig. 3, a specific flowchart of the control method for fluorine deficiency protection of the air conditioner is as follows:
a1, starting up and running for preset time t;
a2, determining whether | T is satisfiedInner ring-TInner pipe|<△TInner partAnd | TOuter ring-TOuter tube|<△TOuter cover(ii) a If yes, go to step A3; if not, go to step B1;
a3, according to TInner ring、TInner pipe、TOuter ring、TOuter tubeCalculating TNormal exhaust，TNormal exhaust＝A*TOuter tube+B*
TInner pipe+C；
A4, determining whether T is satisfiedActual exhaust-TNormal exhaust＞△TExhaust of gases(ii) a If yes, go to step A5; if not, executing the step B1;
a5, the air conditioner performs fluorine-lacking protection, stops the machine and sends out fluorine-lacking prompt information.
B1, the air conditioner operates normally, and the fluorine-lacking protection monitoring is quitted.
In step (C) TInner ringIs the indoor ambient temperature, TInner pipeIs the pipe temperature T of the indoor heat exchangerOuter ringIs the outdoor ambient temperature, TOuter tubeIs the tube temperature, delta T, of the outdoor heat exchangerInner partIs a first predetermined threshold value, DeltaTOuter coverIs a second predetermined threshold value, TNormal exhaustIs the normal exhaust temperature, TActual exhaustIs the measured actual exhaust temperature, Δ TExhaust of gasesIt means presetting the temperature difference of the exhaust gas lacking fluorine.
Therefore, the fluorine-lack protection control method can double verify whether the air conditioner lacks fluorine or not, can protect the air conditioner in time, cannot carry out error protection in normal time, and detects the | T when the air conditioner operates for a preset time TInner ring-TInner pipe|<△TInner partAnd | TOuter ring-TOuter tube|<△TOuter coverAnd T isActual exhaust-TNormal exhaust＞△TExhaust of gasesAnd in time, the fluorine-lacking protection and the shutdown are carried out, and a fault code is displayed on the indoor unit to remind a user of repairing.
Referring to fig. 4, the present invention further provides an air conditioner, including a memory 20, a processor 10 and a control program for fluorine deficiency protection of the air conditioner, stored in the memory 20 and operable on the processor 10, wherein the control program for fluorine deficiency protection of the air conditioner, when executed by the processor 10, implements the steps of the control method for fluorine deficiency protection of the air conditioner as described above; as described above.
The present invention also provides a storage medium, wherein the storage medium stores a computer program executable for implementing the steps of the control method for fluorine deficiency protection of an air conditioner as described above; as described above.
In summary, the control method, the air conditioner and the storage medium for fluorine deficiency protection of the air conditioner disclosed by the invention comprise: determining normal exhaust temperature according to the indoor environment temperature, the indoor heat exchanger tube temperature, the outdoor environment temperature and the outdoor heat exchanger tube temperature; and acquiring actual exhaust temperature, judging the magnitude relation between the normal exhaust temperature and the actual exhaust temperature, and performing fluorine-lacking protection if the judgment result meets the preset condition. The invention determines the normal exhaust temperature through the indoor environment temperature, the pipe temperature of the indoor heat exchanger, the outdoor environment temperature and the pipe temperature of the outdoor heat exchanger, increases the judgment condition of the exhaust temperature, not only considers the influence factors brought by the running of the air conditioner through the pipe temperature of the indoor heat exchanger and the pipe temperature of the outdoor heat exchanger, but also compares the normal exhaust temperature with the actual exhaust temperature, judges whether the refrigerant in the air conditioner is insufficient according to the difference of the temperatures when the refrigerant is insufficient and the difference of the exhaust temperatures, avoids the condition of error protection or untimely protection, and improves the accuracy of fluorine-lacking protection of the air conditioner.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.
Claims (10)
1. A control method for fluorine-lacking protection of an air conditioner is characterized by comprising the following steps:
determining normal exhaust temperature according to the indoor environment temperature, the indoor heat exchanger tube temperature, the outdoor environment temperature and the outdoor heat exchanger tube temperature;
and acquiring actual exhaust temperature, judging the magnitude relation between the normal exhaust temperature and the actual exhaust temperature, and performing fluorine-lacking protection if the judgment result meets the preset condition.
2. The method for controlling fluorine deficiency protection of an air conditioner according to claim 1, wherein said step of determining a normal discharge temperature based on the indoor ambient temperature, the indoor heat exchanger tube temperature, the outdoor ambient temperature and the outdoor heat exchanger tube temperature is preceded by the steps of:
when the starting operation time of the air conditioner reaches a preset time range, the current indoor environment temperature, the pipe temperature of the indoor heat exchanger, the outdoor environment temperature and the pipe temperature of the outdoor heat exchanger of the air conditioner are obtained.
3. The method of claim 2, wherein the step of determining the normal discharge temperature based on the indoor ambient temperature, the indoor heat exchanger tube temperature, the outdoor ambient temperature, and the outdoor heat exchanger tube temperature specifically comprises:
judging whether the difference between the indoor environment temperature and the pipe temperature of the indoor heat exchanger is within a first preset range or not and whether the difference between the outdoor environment temperature and the pipe temperature of the outdoor heat exchanger is within a second preset range or not;
and if the difference between the indoor environment temperature and the pipe temperature of the indoor heat exchanger is within a first preset range and the difference between the outdoor environment temperature and the pipe temperature of the outdoor heat exchanger is within a second preset range, calculating the normal exhaust temperature according to the pipe temperature of the indoor heat exchanger and the pipe temperature of the outdoor heat exchanger.
4. The method for controlling fluorine deficiency protection of an air conditioner according to claim 3, wherein the calculation formula for calculating the normal discharge temperature from the indoor heat exchanger tube temperature and the outdoor heat exchanger tube temperature is: t is3＝A*T1+B*T2+C；
Wherein, T3Is the normal exhaust temperature, T1Is the tube temperature, T, of the outdoor heat exchanger2Is the tube temperature of the indoor heat exchanger; A. b and C are fitting coefficients for normal exhaust temperatures.
5. The method for controlling fluorine deficiency protection of an air conditioner according to claim 1, wherein the step of obtaining an actual exhaust temperature, determining a magnitude relationship between the normal exhaust temperature and the actual exhaust temperature, and performing fluorine deficiency protection if the determination result meets a preset condition specifically comprises:
detecting the current actual exhaust temperature of the air conditioner, and judging the magnitude relation between the normal exhaust temperature and the actual exhaust temperature;
and if the normal exhaust temperature is higher than the actual exhaust temperature, and the difference between the normal exhaust temperature and the actual exhaust temperature is greater than the preset fluorine-lacking exhaust temperature difference, performing fluorine-lacking protection.
6. The control method for fluorine deficiency protection of an air conditioner according to claim 5, wherein the step of performing fluorine deficiency protection is specifically:
controlling the air conditioner to stop and/or sending out a fluorine lack prompt message.
7. The control method of fluorine deficiency protection of an air conditioner according to claim 4, wherein the fitting coefficients A, B and C of the normal discharge temperature are first fitting coefficients when the outdoor ambient temperature is in a first temperature range;
the fitting coefficients A, B and C for the normal discharge air temperature are second fitting coefficients when the outdoor ambient temperature is within a second temperature range.
8. The method of claim 3, wherein the step of determining whether the difference between the indoor ambient temperature and the indoor heat exchanger tube temperature is within a first predetermined range and whether the difference between the outdoor ambient temperature and the outdoor heat exchanger tube temperature is within a second predetermined range further comprises:
and if the difference between the indoor environment temperature and the pipe temperature of the indoor heat exchanger is not in a first preset range and/or the difference between the outdoor environment temperature and the pipe temperature of the outdoor heat exchanger is not in a second preset range, controlling the air conditioner to normally operate and quitting the fluorine-lacking protection monitoring.
9. An air conditioner, comprising a memory, a processor and a control program for fluorine deficiency protection of the air conditioner stored in the memory and operable on the processor, wherein the control program for fluorine deficiency protection of the air conditioner realizes the steps of the control method for fluorine deficiency protection of the air conditioner according to any one of claims 1 to 8 when executed by the processor.
10. A storage medium characterized in that the storage medium stores a computer program executable for implementing the steps of the control method of fluorine deficiency protection of an air conditioner according to any one of claims 1 to 8.
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