CN113606742A - Air conditioner fluorine deficiency protection control method, air conditioner and computer readable storage medium - Google Patents

Air conditioner fluorine deficiency protection control method, air conditioner and computer readable storage medium Download PDF

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Publication number
CN113606742A
CN113606742A CN202110929568.1A CN202110929568A CN113606742A CN 113606742 A CN113606742 A CN 113606742A CN 202110929568 A CN202110929568 A CN 202110929568A CN 113606742 A CN113606742 A CN 113606742A
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air conditioner
fluorine
control method
protection control
compressor
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Chinese (zh)
Inventor
李理科
陈华
邓赛峰
宋磊
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Ningbo Aux Electric Co Ltd
Ningbo Aux Intelligent Commercial Air Conditioning Manufacturing Co Ltd
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Ningbo Aux Electric Co Ltd
Ningbo Aux Intelligent Commercial Air Conditioning Manufacturing Co Ltd
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Priority to CN202110929568.1A priority Critical patent/CN113606742A/en
Publication of CN113606742A publication Critical patent/CN113606742A/en
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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
    • 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
    • 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
    • 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
    • F24F11/65—Electronic processing for selecting an operating mode
    • 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
    • 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
    • F24F11/88—Electrical aspects, e.g. circuits
    • 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
    • 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
    • F24F2140/10—Pressure
    • F24F2140/12—Heat-exchange fluid pressure

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Thermal Sciences (AREA)
  • Human Computer Interaction (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention provides an air conditioner fluorine deficiency protection control method, an air conditioner and a computer readable storage medium, wherein the air conditioner fluorine deficiency protection control method comprises the following steps: s1, starting the air conditioner to operate; s2, the air conditioner acquires the exhaust superheat SH and the suction superheat SSH in real time; s3, judging whether SH is larger than or equal to beta multiplied by a first preset value and SSH is larger than or equal to beta multiplied by a second preset value at the same time by the air conditioner; if yes, go to step S4; if not, the air conditioner continues to operate; s4, detecting the outer ring temperature Tw in real time by the air conditioner, and judging whether the high-pressure saturation temperature Tc meets the condition that Tc + K is not more than Tw; if yes, stopping the compressor for protection, and enabling a fluorine-lack prompt lamp on a display lamp panel of the air conditioner to be long and bright; the invention improves the accuracy of the air conditioner in judging the fluorine deficiency condition, avoids the occurrence of the misjudgment condition and ensures the effectiveness of the air conditioner fluorine deficiency protection control method. In addition, the compressor is shut down and protected after the judgment of fluorine shortage, so that the damage of parts caused by the operation of the air conditioner in a fluorine shortage state is avoided, and the operation reliability of the unit is improved.

Description

Air conditioner fluorine deficiency protection control method, air conditioner and computer readable storage medium
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner fluorine deficiency protection control method, an air conditioner and a computer readable storage medium.
Background
The air conditioner is indispensable electrical equipment in people's daily life, has diversified structural style. With the continuous improvement of the industrial design level and the application of new processes, new materials, new shapes and new technologies to the air conditioner, not only various air conditioners are developed, but also the control methods of the air conditioner in different environments are correspondingly improved.
Taking the fluorine deficiency condition of the multi-connected air-conditioning system as an example, the multi-connected air-conditioning system often has the following problems if the system is fluorine deficient in the long-time operation process:
1. the performance of the unit is affected, and the actual effect is poor.
2. The oil return amount of the system can be reduced due to long-term fluorine shortage of the system, and the press is easy to wear due to insufficient lubrication of the press.
The existing multi-connected air conditioning system usually has no corresponding fluorine-lacking protection control, and if the system obviously lacks a refrigerant in the operation process, but still continuously operates, the compressor is subjected to irreversible damage such as abrasion and the like. Meanwhile, in the existing air conditioner fluorine deficiency protection technology, a temperature sensor or a pressure sensor is mostly adopted to detect whether fluorine is deficient, when the air conditioner is determined to be fluorine deficient, the air conditioner sends a protection instruction to stop the whole machine to run, but the air conditioning system is easy to misjudge in the process of starting running to running stability or under the working condition of high temperature and high humidity, so that the accuracy of judging the fluorine deficiency by the air conditioner is influenced.
Disclosure of Invention
In view of the above, the present invention is directed to provide an air conditioner fluorine deficiency protection control method, an air conditioner, and a computer readable storage medium, so as to solve the problem in the prior art that a multi-connected air conditioning system is prone to erroneous judgment during a fluorine deficiency protection process, so as to improve the accuracy of the air conditioning system in judging fluorine deficiency.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a fluorine deficiency protection control method for an air conditioner comprises the following steps: s1, starting the air conditioner to operate; s2, the air conditioner acquires the exhaust superheat SH and the suction superheat SSH in real time; s3, judging whether SH is larger than or equal to beta multiplied by a first preset value and SSH is larger than or equal to beta multiplied by a second preset value at the same time by the air conditioner; if yes, go to step S4; if not, the air conditioner continues to operate; s4, detecting the outer ring temperature Tw in real time by the air conditioner, and judging whether the high-pressure saturation temperature Tc meets the condition that Tc + K is not more than Tw; if yes, stopping the compressor for protection, and enabling a fluorine-lack prompt lamp on a display lamp panel of the air conditioner to be long and bright; wherein beta is more than 1.5, the first preset value is 18-22 ℃, the second preset value is 4-5 ℃, and K is 4-6 ℃; therefore, the air conditioner fluorine deficiency protection control method provided by the application firstly carries out primary judgment on the fluorine deficiency condition of the air conditioner through double-parameter judgment on the exhaust superheat SH and the suction superheat SSH, and when the exhaust superheat SH and the suction superheat SSH both meet relevant judgment conditions, the air conditioner possibly has the fluorine deficiency condition; secondly, judging the relationship between the outer ring temperature Tw and the high-pressure saturation temperature Tc to judge the fluorine lack condition of the air conditioner in a secondary mode so as to determine whether the air conditioner has the fluorine lack condition; according to the method, on one hand, the accuracy of the air conditioner in judging the fluorine deficiency condition can be effectively improved, the occurrence of the misjudgment condition is avoided, and on the other hand, the effectiveness of the air conditioner fluorine deficiency protection control method can be ensured no matter the air conditioner is in the conventional external environment or in the special external environments such as high temperature and high humidity through the two-stage detection-judgment process, particularly the second-stage judgment process carried out on the relation between the external loop temperature Tw and the high pressure saturation temperature Tc. In addition, the compressor is shut down and protected after the judgment of fluorine shortage, so that the damage of parts caused by the operation of the air conditioner in a fluorine shortage state is avoided, and the operation reliability of the unit is improved.
Further, step S2 includes: s21, detecting the pressure P1 of the exhaust pipe of the compressor, the temperature T1 of the exhaust pipe of the compressor, the pressure P2 of the suction pipe of the compressor and the temperature T2 of the suction pipe of the compressor in real time by the air conditioner; s22, the air conditioner obtains a high-pressure saturation temperature Tc according to the pressure P1 of the compressor exhaust pipe; the air conditioner obtains a low-pressure saturation temperature Td according to the pressure P2 of the suction pipe of the compressor; s23, acquiring the exhaust superheat SH by the air conditioner according to T1 and Tc, and acquiring the suction superheat SSH according to T2 and Td; wherein SH is T1-Tc, and SH is T2-Td; therefore, through the process of the steps S21-S23, the exhaust superheat degree can be accurately obtained, errors or deviations of data information introduced by adopting an approximate processing method in the prior art are avoided, the occurrence of misjudgment caused by data deviations is reduced to the maximum extent, and the accuracy of fluorine deficiency judgment is improved.
Further, step S3 includes: s31, the air conditioner judges whether SH is larger than or equal to alpha multiplied by a first preset value and SSH is larger than or equal to alpha multiplied by a second preset value; if yes, go to step S32; if not, returning to the step S2; s32, controlling the compressor to operate in a frequency reduction mode by the air conditioner, and simultaneously displaying that a fluorine-lacking indicator lamp on the lamp panel flickers; s33, judging whether SH is larger than or equal to beta multiplied by a first preset value and SSH is larger than or equal to beta multiplied by a second preset value at the same time by the air conditioner; if yes, go to step S4; if not, returning to the step S32; wherein alpha is less than beta; preferably, alpha is more than 1.0 and less than or equal to 1.5; therefore, when it is determined that the air conditioner is likely to have fluorine deficiency through the step S31, the fluorine deficiency early warning stage is executed first, the air conditioner is kept running down, so that the air conditioner can still ensure the use of the user, and then the air conditioner in the fluorine deficiency early warning stage is continuously subjected to a two-stage judgment process, so that on one hand, the accuracy of judgment of the air conditioner on the fluorine deficiency condition is ensured, and the occurrence of the misjudgment condition is avoided, and on the other hand, once the two-stage judgment determines that the air conditioner is serious in fluorine deficiency, the air conditioner determines to perform fluorine deficiency protection, the compressor is shut down for protection, the damage of components caused by the running of the air conditioner in the fluorine deficiency state is avoided, and the reliability of the unit running is improved.
Further, in step S4, when it is determined that Tc + K is not satisfied at Tw, the air conditioner returns to step S32; therefore, under the condition that serious fluorine deficiency possibly exists, the relationship between the outer ring temperature Tw and the high-pressure saturation temperature Tc is further judged, so that the accuracy of judging the fluorine deficiency condition by the air conditioner is ensured, and the occurrence of misjudgment is avoided; meanwhile, when the air conditioner is determined not to be seriously lack of fluorine, the operation of the step S32 is maintained, on one hand, the operation load of the compressor is reduced under the condition that the fluorine lack is possibly caused, the prompt lamp is flickered to prompt manual intervention, on the other hand, the continuous operation of the air conditioner is ensured, the phenomenon that the operation effect of the air conditioner is influenced by too much shutdown protection is avoided, and the air conditioner use feeling of a user is ensured to the maximum extent.
An air conditioner comprises a computer readable storage medium and a processor, wherein a computer program is stored in the computer readable storage medium, and when the computer program is read and executed by the processor, the air conditioner fluorine deficiency protection control method is realized.
A computer-readable storage medium, which stores a computer program, and when the computer program is read and executed by a processor, the computer program implements the air-conditioning fluorine deficiency protection control method.
Compared with the prior art, the air conditioner fluorine deficiency protection control method, the air conditioner and the computer readable storage medium have the following advantages:
the invention relates to a fluorine-deficiency protection control method for an air conditioner, the air conditioner and a computer readable storage medium, firstly, the fluorine-deficiency condition of the air conditioner is primarily judged by judging double parameters of an exhaust superheat SH and an air suction superheat SSH, and when the exhaust superheat SH and the air suction superheat SSH both meet relevant judgment conditions, the air conditioner possibly has the fluorine-deficiency condition; secondly, judging the relationship between the outer ring temperature Tw and the high-pressure saturation temperature Tc to judge the fluorine lack condition of the air conditioner in a secondary mode so as to determine whether the air conditioner has the fluorine lack condition; according to the method, on one hand, the accuracy of the air conditioner in judging the fluorine deficiency condition can be effectively improved, the occurrence of the misjudgment condition is avoided, and on the other hand, the effectiveness of the air conditioner fluorine deficiency protection control method can be ensured no matter the air conditioner is in the conventional external environment or in the special external environments such as high temperature and high humidity through the two-stage detection-judgment process, particularly the second-stage judgment process carried out on the relation between the external loop temperature Tw and the high pressure saturation temperature Tc. In addition, the compressor is shut down and protected after the judgment of fluorine shortage, so that the damage of parts caused by the operation of the air conditioner in a fluorine shortage state is avoided, and the operation reliability of the unit is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic flow chart of a control method for fluorine deficiency protection of an air conditioner according to an embodiment of the present invention.
Detailed Description
The inventive concepts of the present disclosure will be described hereinafter using terms commonly employed by those skilled in the art to convey the substance of their work to others skilled in the art. These inventive concepts may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Example 1
For fluorine-deficient protection control of a multi-connected air conditioning system, in the prior art, a temperature sensor or a pressure sensor is often adopted to detect whether fluorine is deficient, when the fluorine deficiency of the air conditioner is determined, the air conditioner sends a protection instruction to stop the operation of the whole machine, but the air conditioning system is easy to misjudge during the stable operation process from the beginning of the operation of the air conditioning system or under the working condition of high temperature and high humidity, so that the accuracy of the judgment of the air conditioner on the fluorine deficiency is influenced.
In order to solve the problems that in the prior art, a multi-connected air conditioning system is prone to erroneous judgment in a fluorine-deficient protection process and the accuracy of fluorine-deficient judgment is poor, the embodiment provides an air conditioning fluorine-deficient protection control method, as shown in fig. 1, the air conditioning fluorine-deficient protection control method includes the following steps:
s1, starting the air conditioner to operate;
for the starting operation process, operation mode, etc. of the air conditioner, the existing air conditioner starting technology may be adopted in the corresponding application environment, which is not described herein again.
S2, the air conditioner acquires the exhaust superheat SH and the suction superheat SSH in real time;
the exhaust superheat SH and the intake superheat SSH are theoretically equal to the exhaust temperature-saturation temperature corresponding to the exhaust pressure, and the intake temperature-saturation temperature corresponding to the intake pressure.
Therefore, for the step S2, the process of acquiring the exhaust superheat SH and the intake superheat SSH includes:
s21, detecting the pressure P1 of the exhaust pipe of the compressor, the temperature T1 of the exhaust pipe of the compressor, the pressure P2 of the suction pipe of the compressor and the temperature T2 of the suction pipe of the compressor in real time by the air conditioner;
through set up conventional pressure detection device, temperature-detecting device in compressor blast pipe, breathing pipe department for the air conditioner can carry out real-time detection to relevant pressure, temperature parameter, is prior art in view of relevant temperature, pressure detection technique, does not give unnecessary details here.
P1 is an actual pressure value of the refrigerant in the compressor discharge pipe, and T1 is an actual temperature value of the refrigerant in the compressor discharge pipe; accordingly, P2 is the actual pressure value of the refrigerant in the compressor suction pipe, and T2 is the actual temperature value of the refrigerant in the compressor suction pipe.
S22, the air conditioner obtains a high-pressure saturation temperature Tc according to the pressure P1 of the compressor exhaust pipe; the air conditioner obtains a low-pressure saturation temperature Td according to the pressure P2 of the suction pipe of the compressor;
for the phase balance of the gas phase and the liquid phase of the refrigerant substance, the corresponding saturation temperature of the refrigerant exists in a certain pressure range, and the gas phase and the liquid phase are in a dynamic balance state at the moment. Correspondingly, before the air conditioner leaves the factory, the air conditioner manufacturer presets a refrigerant saturation temperature value corresponding to each compressor exhaust pipe/suction pipe pressure value in the air conditioner data storage device, or a corresponding relationship between the compressor exhaust pipe/suction pipe pressure value and the refrigerant saturation temperature value. That is, the saturation temperature can be directly obtained according to the corresponding pressure condition and through the preset corresponding relationship.
In addition, if the refrigerant in the air conditioner is a single component, the single component is taken as a reference substance according to the corresponding situation between the pressure value of the exhaust pipe/suction pipe of the compressor and the saturation temperature value of the refrigerant; if the refrigerant in the air conditioner is a mixed component, the correspondence between the pressure value of the discharge pipe/suction pipe of the compressor and the saturation temperature value of the refrigerant is preferably based on one component with the largest content.
S23, acquiring the exhaust superheat SH by the air conditioner according to T1 and Tc, and acquiring the suction superheat SSH according to T2 and Td;
the exhaust superheat SH is the superheat degree of a refrigerant in a compressor exhaust pipe, and SH is T1-Tc; the suction superheat SSH is the superheat of the refrigerant in the compressor suction pipe, and SH is T2-Td.
Therefore, through the process of the steps S21-S23, the exhaust superheat degree can be accurately obtained, errors or deviations of data information introduced by adopting an approximate processing method in the prior art are avoided, the occurrence of misjudgment caused by data deviations is reduced to the maximum extent, and the accuracy of fluorine deficiency judgment is improved.
S3, judging whether SH is larger than or equal to beta multiplied by a first preset value and SSH is larger than or equal to beta multiplied by a second preset value at the same time by the air conditioner; if yes, go to step S4; if not, the air conditioner continues to operate;
the method comprises the following steps that beta is a preset dimensionless coefficient, a first preset value is an exhaust superheat degree preset value, a second preset value is an intake superheat degree preset value, and the first preset value and the second preset value are related preset parameters of a unit of the multi-connected air-conditioning system in normal liquid amount under a rated working condition; the beta value, the first preset value and the second preset value are data preset in an air conditioner data storage device by an air conditioner manufacturer, and in view of different conditions of the research and development processes, the air conditioner performance requirements and the like of different air conditioner manufacturers, the beta value, the first preset value and the second preset value can adopt different data in the actual production and manufacturing process.
According to the practical development process of the applicant aiming at the multi-connected air-conditioning system, beta in the application is more than 1.5, the first preset value is 18-22 ℃, and the second preset value is 4-5 ℃. Preferably, β is 1.6, the first preset value is 20 ℃, and the second preset value is 5 ℃.
S4, detecting the outer ring temperature Tw in real time by the air conditioner, and judging whether the high-pressure saturation temperature Tc meets the condition that Tc + K is not more than Tw; if yes, the compressor is shut down for protection, and a fluorine-lacking prompt lamp on the air conditioner display lamp panel is on for a long time.
Wherein, the high-pressure saturation temperature Tc is obtained in step S2, and the specific process may refer to steps S21-S23, which are not described herein again; k is a preset compensation temperature value and is determined according to the actual test condition of an air conditioner manufacturer. According to the practical research and development process of the applicant aiming at the multi-connected air-conditioning system, K in the application is 4-6 ℃; preferably, K is 5 ℃.
Therefore, the air conditioner fluorine deficiency protection control method provided by the application firstly carries out primary judgment on the fluorine deficiency condition of the air conditioner through double-parameter judgment on the exhaust superheat SH and the suction superheat SSH, and when the exhaust superheat SH and the suction superheat SSH both meet relevant judgment conditions, the air conditioner possibly has the fluorine deficiency condition; secondly, judging the relationship between the outer ring temperature Tw and the high-pressure saturation temperature Tc to judge the fluorine lack condition of the air conditioner in a secondary mode so as to determine whether the air conditioner has the fluorine lack condition; according to the method, on one hand, the accuracy of the air conditioner in judging the fluorine deficiency condition can be effectively improved, the occurrence of the misjudgment condition is avoided, and on the other hand, the effectiveness of the air conditioner fluorine deficiency protection control method can be ensured no matter the air conditioner is in the conventional external environment or in the special external environments such as high temperature and high humidity through the two-stage detection-judgment process, particularly the second-stage judgment process carried out on the relation between the external loop temperature Tw and the high pressure saturation temperature Tc. In addition, the compressor is shut down and protected after the judgment of fluorine shortage, so that the damage of parts caused by the operation of the air conditioner in a fluorine shortage state is avoided, and the operation reliability of the unit is improved.
Example 2
In order to further improve the accuracy of the air conditioner in judging the fluorine deficiency condition and fully ensure the use of the air conditioner by the user, this embodiment will further complement the method in embodiment 1 on the basis of embodiment 1.
Specifically, in the application, the air-conditioning fluorine-deficiency protection control process comprises a fluorine-deficiency early warning stage and a fluorine-deficiency protection stage. For the method in embodiment 1, after performing step S2, specifically after performing step S23, the step S3 includes:
s31, the air conditioner judges whether SH is larger than or equal to alpha multiplied by a first preset value and SSH is larger than or equal to alpha multiplied by a second preset value; if yes, go to step S32; if not, returning to the step S2;
the first preset value and the second preset value are consistent with relevant contents in embodiment 1, and α is a preset dimensionless coefficient and is data preset in an air conditioner data storage device by an air conditioner manufacturer. According to the practical research and development process of the applicant aiming at the multi-connected air-conditioning system, alpha is more than 1.0 and less than or equal to 1.5; preferably, α is 1.1.
S32, controlling the compressor to operate in a frequency reduction mode by the air conditioner, and simultaneously displaying that a fluorine-lacking indicator lamp on the lamp panel flickers;
wherein, as preferred, the air conditioner control compressor falls 50% of the frequency on the basis of normal operating frequency, on the one hand under the condition that probably takes place to lack fluorine, reduces the operating load of compressor to the warning light twinkles and lights, and the suggestion manual intervention, on the other hand guarantee the continuous operation of air conditioner, avoid the too much influence air conditioner operation effect of shutdown protection, guarantee user's air conditioner use sensation at the at utmost.
S33, judging whether SH is larger than or equal to beta multiplied by a first preset value and SSH is larger than or equal to beta multiplied by a second preset value at the same time by the air conditioner; if yes, go to step S4; if not, returning to the step S32;
wherein β, the first preset value, and the second preset value are the same as those in embodiment 1.
After the determination at step S33 is yes, the method further includes:
step S4, detecting the outer ring temperature Tw in real time by the air conditioner, and judging whether the high-pressure saturation temperature Tc meets the condition that Tc + K is not more than Tw; if yes, stopping the compressor for protection, and enabling a fluorine-lack prompt lamp on a display lamp panel of the air conditioner to be long and bright; if not, the process returns to step S32.
The fluorine-lack early warning stage may be regarded as the process of steps S31-S32, and the fluorine-lack protection stage may be regarded as the process of steps S33-S4. That is, in the embodiment, the double-parameter determination of the exhaust superheat SH and the suction superheat SSH is performed, and two double-parameter determinations are performed successively, so as to determine whether fluorine deficiency is likely to be serious, if fluorine deficiency is not serious, fluorine deficiency early warning is performed, and if serious fluorine deficiency is likely to exist, the relationship between the outer ring temperature Tw and the high-pressure saturation temperature Tc is further determined, so that the accuracy of the air conditioner in determining the fluorine deficiency condition is ensured, and the occurrence of misdetermination is avoided.
Therefore, in the embodiment, when it is determined that the air conditioner is likely to have fluorine deficiency through step S31, the fluorine deficiency early warning stage is executed first, the air conditioner is kept running down, so that the air conditioner can still ensure the use of the user, and then the air conditioner in the fluorine deficiency early warning stage is continuously subjected to the two-stage judgment process, so that on one hand, the accuracy of the judgment of the air conditioner on the fluorine deficiency condition is ensured, and the occurrence of the misjudgment condition is avoided.
In addition, if the air conditioner is kept to operate in the fluorine-deficient early warning stage for a long time, namely the air conditioner keeps the compressor running in a frequency reduction mode for a long time, and meanwhile, the fluorine-deficient prompt lamp on the display lamp panel flashes and lights up, certain influence on the use condition of a user may be caused, and the continuous operation of the fluorine-deficient protection control method of the air conditioner is difficult to ensure. For this reason, in the present embodiment, the optimization and improvement of steps S33-S4 specifically means that in the process of "returning to step S32" in steps S33 and S4, step S34 is first executed, specifically:
s34, the air conditioner obtains the duration of the compressor in the state of frequency reduction operation or obtains the duration of the fluorine-lacking warning light in the state of flickering and lighting;
for the duration, the duration is the time for which the air conditioner continuously operates in a corresponding state; in the application, the duration of the compressor in the frequency reduction operation state and the duration of the fluorine-lacking warning light in the flashing and lighting state can be regarded as the same data parameter, and the duration of the air conditioner in the fluorine-lacking early warning stage can also be regarded as the duration of the air conditioner in the fluorine-lacking early warning stage.
S35, judging whether the duration is longer than a preset duration by the air conditioner; if yes, return to step S2; if not, the process returns to step S32.
Wherein, in the process of returning to step S2, the air conditioner may still maintain the operation condition in step S32; however, as a preferred embodiment of the present application, in the process of returning to step S2, the air conditioner returns to the normal operation state, the fluorine-deficient warning light is turned off, and then, the process returns to step S2.
Therefore, the air conditioner can perform closed-loop judgment on the fluorine lack condition again in time by judging the running time of the air conditioner continuously in the fluorine lack early warning stage, the possible misjudgment in the fluorine lack protection control process of a single air conditioner is avoided, the accuracy of judging the fluorine lack condition by the air conditioner is further improved, and meanwhile, the continuous running of the air conditioner is also ensured to a certain extent.
The invention also provides an air conditioner which adopts the air conditioner fluorine deficiency protection control method; the air conditioner comprises a computer readable storage medium and a processor, wherein a computer program is stored in the computer readable storage medium, and when the computer program is read and run by the processor, the air conditioner fluorine deficiency protection control method is realized. Meanwhile, the application also provides a computer readable storage medium, wherein a computer program is stored in the computer readable storage medium, and when the computer program is read and operated by a processor, the air conditioner fluorine deficiency protection control method is realized.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. The air conditioner fluorine deficiency protection control method is characterized by comprising the following steps:
s1, starting the air conditioner to operate;
s2, the air conditioner acquires the exhaust superheat SH and the suction superheat SSH in real time;
s3, judging whether SH is larger than or equal to beta multiplied by a first preset value and SSH is larger than or equal to beta multiplied by a second preset value at the same time by the air conditioner; if yes, go to step S4; if not, the air conditioner continues to operate;
s4, detecting the outer ring temperature Tw in real time by the air conditioner, and judging whether the high-pressure saturation temperature Tc meets the condition that Tc + K is not more than Tw; if yes, the compressor is shut down for protection, and a fluorine-lacking prompt lamp on the air conditioner display lamp panel is on for a long time.
2. An air conditioner fluorine deficiency protection control method according to claim 1, wherein step S2 includes:
s21, detecting the pressure P1 of the exhaust pipe of the compressor, the temperature T1 of the exhaust pipe of the compressor, the pressure P2 of the suction pipe of the compressor and the temperature T2 of the suction pipe of the compressor in real time by the air conditioner;
s22, the air conditioner obtains a high-pressure saturation temperature Tc according to the pressure P1 of the compressor exhaust pipe; the air conditioner obtains a low-pressure saturation temperature Td according to the pressure P2 of the suction pipe of the compressor;
s23, the air conditioner obtains the exhaust superheat SH according to T1 and Tc, and obtains the suction superheat SSH according to T2 and Td.
3. An air conditioner fluorine deficiency protection control method as set forth in claim 2, characterized in that SH ═ T1-Tc, SH ═ T2-Td.
4. An air conditioner fluorine deficiency protection control method according to claim 1, wherein in step S3, β > 1.5, the first preset value is 18 ℃ -22 ℃, and the second preset value is 4 ℃ -5 ℃.
5. An air conditioner fluorine deficiency protection control method according to claim 1, wherein in step S4, K is 4 ℃ -6 ℃.
6. An air conditioner fluorine deficiency protection control method according to claim 1, wherein step S3 includes:
s31, the air conditioner judges whether SH is larger than or equal to alpha multiplied by a first preset value and SSH is larger than or equal to alpha multiplied by a second preset value; if yes, go to step S32; if not, returning to the step S2;
s32, controlling the compressor to operate in a frequency reduction mode by the air conditioner, and simultaneously displaying that a fluorine-lacking indicator lamp on the lamp panel flickers;
s33, judging whether SH is larger than or equal to beta multiplied by a first preset value and SSH is larger than or equal to beta multiplied by a second preset value at the same time by the air conditioner; if yes, go to step S4; if not, returning to the step S32;
wherein alpha is less than beta.
7. An air conditioner fluorine deficiency protection control method according to claim 6, wherein in step S31, 1.0 < α ≦ 1.5.
8. An air conditioner fluorine deficiency protection control method according to claim 6, wherein in step S4, when it is judged that Tc + K ≦ Tw, the air conditioner returns to step S32.
9. An air conditioner comprising a computer-readable storage medium storing a computer program and a processor, wherein the computer program is read by the processor and executed to implement the air conditioner fluorine deficiency protection control method according to any one of claims 1 to 8.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program, which is read and executed by a processor, and implements the air-conditioning fluorine deficiency protection control method according to any one of claims 1 to 8.
CN202110929568.1A 2021-08-13 2021-08-13 Air conditioner fluorine deficiency protection control method, air conditioner and computer readable storage medium Withdrawn CN113606742A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113983645A (en) * 2021-11-29 2022-01-28 宁波奥克斯电气股份有限公司 Fault early warning method and device and multi-linkage air conditioner
CN114087710A (en) * 2021-11-12 2022-02-25 珠海格力电器股份有限公司 Fluorine deficiency detection method and device for air conditioner, storage medium and electronic equipment

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114087710A (en) * 2021-11-12 2022-02-25 珠海格力电器股份有限公司 Fluorine deficiency detection method and device for air conditioner, storage medium and electronic equipment
CN114087710B (en) * 2021-11-12 2022-11-11 珠海格力电器股份有限公司 Fluorine-lack detection method and device for air conditioner, storage medium and electronic equipment
CN113983645A (en) * 2021-11-29 2022-01-28 宁波奥克斯电气股份有限公司 Fault early warning method and device and multi-linkage air conditioner

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