CN114087710A - Fluorine deficiency detection method and device for air conditioner, storage medium and electronic equipment - Google Patents
Fluorine deficiency detection method and device for air conditioner, storage medium and electronic equipment Download PDFInfo
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- CN114087710A CN114087710A CN202111342421.9A CN202111342421A CN114087710A CN 114087710 A CN114087710 A CN 114087710A CN 202111342421 A CN202111342421 A CN 202111342421A CN 114087710 A CN114087710 A CN 114087710A
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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
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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
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
Abstract
The invention discloses a fluorine deficiency detection method and device for an air conditioner, a storage medium and electronic equipment, and belongs to the field of air conditioners. Wherein, the method comprises the following steps: collecting a plurality of groups of real-time temperatures during the operation of the air conditioner; judging whether the mass flow of the air conditioner is lower than a threshold value according to the multiple groups of real-time temperatures, wherein the mass flow is the mass of a refrigerant sucked or discharged into or out of a compressor in unit time; and if the mass flow of the air conditioner is lower than a threshold value, determining that the air conditioner is lack of fluorine. The invention solves the technical problem of lower accuracy of fluorine deficiency detection in the related technology, calculates and judges the mass flow of the air conditioner by comprehensively judging the relationship among a plurality of groups of real-time temperatures, thereby determining whether the air conditioner is fluorine deficient, realizing the real-time detection of whether the air conditioner is fluorine deficient, having little influence by the environmental temperature and having high accuracy.
Description
Technical Field
The invention relates to the field of air conditioners, in particular to a fluorine deficiency detection method and device for an air conditioner, a storage medium and electronic equipment.
Background
In the related art, refrigerant leakage may occur during the use of the air conditioner, and when severe refrigerant leakage occurs, the temperature of the compressor increases due to insufficient cooling, and an excessively high temperature may cause carbonization of lubricating oil and damage to internal parts of the compressor. Therefore, the air conditioner needs to have a fluorine-lacking protection function, and can be stopped for protection in time when serious refrigerant leakage occurs, so that the compressor is prevented from being damaged.
The fluorine deficiency detection technology in the related technology judges the fluorine deficiency by comparing the difference between the evaporator tube temperature and the indoor environment temperature in the power-off and power-on states, and judges that the air conditioner is fluorine deficiency when the difference between the evaporator tube temperature and the indoor environment temperature is too small. However, under extreme working conditions such as high humidity of indoor environment and large air volume of an internal machine, the difference between the temperature of the evaporator tube and the temperature of the indoor environment is very small, and the fluorine-lacking detection has errors, so that the conventional fluorine-lacking protection technology may have error protection, and therefore needs to be improved.
In view of the above problems in the related art, no effective solution has been found at present.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a fluorine-lack detection method and device for an air conditioner, a storage medium and electronic equipment.
According to an aspect of an embodiment of the present application, there is provided a fluorine deficiency detection method for an air conditioner, including: collecting a plurality of groups of real-time temperatures during the operation of the air conditioner; judging whether the mass flow of the air conditioner is lower than a threshold value according to the multiple groups of real-time temperatures, wherein the mass flow is the mass of a refrigerant sucked or discharged into or out of a compressor in unit time; and if the mass flow of the air conditioner is lower than a threshold value, determining that the air conditioner is lack of fluorine.
Further, the collecting the real-time temperature of the air conditioner during operation comprises: the exhaust temperature, the condenser outlet pipe temperature, the evaporator inlet pipe temperature, the indoor environment temperature and the outdoor environment temperature of the air conditioner during operation are collected.
Further, judging whether the mass flow of the air conditioner is lower than a threshold value according to the plurality of groups of real-time temperatures comprises: calculating a target difference value between the temperature difference between the front and the rear of a throttling device of the air conditioner and the environmental temperature difference according to a first group of real-time temperatures, and calculating the exhaust superheat degree of the air conditioner according to a second group of real-time temperatures, wherein the first group of real-time temperatures and the second group of real-time temperatures are collected in the same detection period; and if the target difference value in the current detection period is smaller than or equal to a first preset value and the exhaust superheat degree is larger than or equal to a second preset value, determining that the mass flow of the air conditioner is lower than a threshold value.
Further, the first set of real-time temperatures includes: condenser outlet pipe temperature TCold dischargeTemperature T of inlet pipe of evaporatorIs steamed intoIndoor ambient temperature TInner ringOutdoor ambient temperature TOuter ring(ii) a The second set of real-time temperatures includes the exhaust temperature TExhaust of gasesOutlet temperature T of condenserIs steamed intoAnd calculating a target difference value of the temperature difference between the front and the back of the throttling device of the air conditioner and the environment temperature difference according to the first group of real-time temperatures, wherein the target difference value comprises the following steps: the target difference Δ T is calculated using the following formula1：ΔT1＝(TCold discharge-TIs steamed into)-(TOuter ring-TInner ring) (ii) a Calculating the superheat of the exhaust air of the air conditioner according to the second group of real-time temperatures comprises: the target difference Δ T is calculated using the following formula2：ΔT2＝TExhaust of gases-TCold discharge。
Further, if the mass flow of the air conditioner is lower than a threshold value, determining that the air conditioner lacks fluorine comprises:
if the mass flow of the air conditioner is lower than a threshold value, determining that the air conditioner meets a fluorine lack condition in the current detection period; controlling the air conditioner to perform midway shutdown protection within a first time length, and accumulating the times of fluorine deficiency of the air conditioner; judging whether the fluorine lack times of the air conditioner in the current statistical period reach preset times or not; if the times of fluorine deficiency of the air conditioner in the counting period reach preset times, determining that the air conditioner lacks fluorine; if the fluorine lack times of the air conditioner in the counting period do not reach the preset times, after the air conditioner is stopped and protected midway, whether the air conditioner meets the fluorine lack condition or not is continuously judged in the next detection period until the next counting period is started, wherein the duration of the counting period is longer than that of the detection period.
Further, after determining that the air conditioner is deficient in fluorine, the method further includes: and controlling the air conditioner to carry out fluorine-lacking protection shutdown, and outputting fluorine-lacking prompt information.
Further, before collecting the plurality of sets of real-time temperatures when the air conditioner is running, the method further comprises the following steps: monitoring the starting operation time of the air conditioner; and when the starting operation time reaches a second time length, determining to acquire multiple groups of real-time temperatures of the air conditioner during operation.
According to another aspect of the embodiments of the present application, there is also provided a fluorine deficiency detecting apparatus for an air conditioner, including: the acquisition module is used for acquiring a plurality of groups of real-time temperatures when the air conditioner operates; the judging module is used for judging whether the mass flow of the air conditioner is lower than a threshold value according to the multiple groups of real-time temperatures, wherein the mass flow is the mass of refrigerant sucked or discharged into or out of a compressor in unit time; and the determining module is used for determining that the air conditioner lacks fluorine if the mass flow of the air conditioner is lower than a threshold value.
Further, the acquisition module comprises: the first acquisition unit is used for acquiring the exhaust temperature, the outlet pipe temperature of the condenser, the inlet pipe temperature of the evaporator, the indoor environment temperature and the outdoor environment temperature when the air conditioner operates.
Further, the judging module comprises: the air conditioner comprises a first calculation unit and a second calculation unit, wherein the first calculation unit is used for calculating a target difference value between the front and rear temperature difference of a throttling device of the air conditioner and the environmental temperature difference according to a first group of real-time temperatures; and the first determining unit is used for determining that the mass flow of the air conditioner is lower than a threshold value if the target difference value in the current detection period is smaller than or equal to a first preset value and the exhaust superheat degree is larger than or equal to a second preset value.
Further, the first set of real-time temperatures includes: condenser outlet pipe temperature TCold dischargeTemperature T of inlet pipe of evaporatorIs steamed intoIndoor ambient temperature TInner ringOutdoor ambient temperature TOuter ring(ii) a The second set of real-time temperatures includes the exhaust temperature TExhaust of gasesOutlet temperature T of condenserIs steamed intoWherein the first calculation unit includes: the target difference Δ T is calculated using the following formula1：ΔT1＝(TCold discharge-TIs steamed into)-(TOuter ring-TInner ring) (ii) a The second calculation unit includes: the target difference Δ T is calculated using the following formula2：ΔT2＝TExhaust of gases-TCold discharge。
Further, the determining module includes: the second determination unit is used for determining that the air conditioner meets the fluorine lack condition in the current detection period if the mass flow of the air conditioner is lower than a threshold value; the first control unit is used for controlling the air conditioner to carry out midway shutdown protection within a first time length, and the first counting unit is used for accumulating the times of fluorine shortage of the air conditioner; the first judgment unit is used for judging whether the fluorine lack times of the air conditioner in the current statistical period reach preset times or not; the third determining unit is used for determining that the air conditioner lacks fluorine if the times of fluorine deficiency of the air conditioner in the counting period reach preset times; and the second judging unit is used for continuously judging whether the air conditioner meets the fluorine lack condition in the next detection period until entering the next statistical period after the air conditioner is stopped and protected halfway until the second statistical period is started if the fluorine lack frequency of the air conditioner in the statistical period does not reach the preset frequency, wherein the duration of the statistical period is greater than that of the detection period.
Further, the apparatus further comprises: and the control module is used for controlling the air conditioner to carry out fluorine-lacking protection shutdown and outputting fluorine-lacking prompt information.
Further, the apparatus further comprises: the monitoring module is used for monitoring the starting operation time of the air conditioner; and the second determining module is used for determining and acquiring multiple groups of real-time temperatures of the air conditioner during operation when the starting operation time reaches a second time length.
According to another aspect of the embodiments of the present application, there is also provided a storage medium including a stored program, wherein the program performs the above-mentioned method steps when executed.
According to another aspect of the embodiments of the present application, there is also provided an electronic device, including a processor, a communication interface, a memory, and a communication bus, where the processor, the communication interface, and the memory complete communication with each other through the communication bus; wherein: a memory for storing a computer program; a processor for executing the above method steps by executing the program stored in the memory.
Embodiments of the present application also provide a computer program product containing instructions, which when run on a computer, cause the computer to perform the steps of the above method.
By the invention, a plurality of groups of real-time temperatures during the operation of the air conditioner are collected, whether the mass flow of the air conditioner is lower than a threshold value or not is judged according to the plurality of groups of real-time temperatures, wherein the mass flow is the mass of a refrigerant sucked or discharged from a compressor in unit time, if the mass flow of the air conditioner is lower than the threshold value, the air conditioner is determined to lack fluorine, the mass flow of the air conditioner is judged according to the plurality of groups of real-time temperatures of the air conditioner, if the mass flow of the air conditioner is lower than the threshold value, the fluorine lack is determined, whether the fluorine lack is detected based on the mass flow of the air conditioner, the technical problem of lower accuracy of the fluorine lack detection in the related technology is solved, the mass flow of the air conditioner is calculated and judged by comprehensively judging the relationship among the plurality of groups of real-time temperatures, the real-time detection of whether the air conditioner is lack of fluorine can be realized, and the influence of the environmental temperature is small, the accuracy is high.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a block diagram of a hardware configuration of an air conditioner according to an embodiment of the present invention;
fig. 2 is a flowchart of a fluorine deficiency detection method of an air conditioner according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the structure of the temperature acquisition in the embodiment of the present invention;
FIG. 4 is a flow chart of a control method for fluorine deficiency protection of an air conditioner according to an embodiment of the present invention;
fig. 5 is a block diagram of a fluorine deficiency detecting device of an air conditioner according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
The method provided by the first embodiment of the present application may be executed in an air conditioner, an air conditioner controller, or a similar computing device. Taking an air conditioner as an example, fig. 1 is a hardware structure block diagram of an air conditioner according to an embodiment of the present invention. As shown in fig. 1, the air conditioner may include one or more (only one is shown in fig. 1) processors 102 (the processor 102 may include, but is not limited to, a processing device such as a microprocessor MCU or a programmable logic device FPGA) and a memory 104 for storing data, and optionally, a transmission device 106 for communication function and an input/output device 108. It will be understood by those skilled in the art that the structure shown in fig. 1 is only an illustration and is not intended to limit the structure of the air conditioner. For example, the air conditioner may also include more or fewer components than shown in FIG. 1, or have a different configuration than shown in FIG. 1.
The memory 104 may be used to store an air conditioner program, for example, a software program and a module of an application software, such as an air conditioner fluorine deficiency detection program corresponding to a fluorine deficiency detection method of an air conditioner in an embodiment of the present invention, and the processor 102 executes various functional applications and data processing by running the air conditioner fluorine deficiency detection program stored in the memory 104, that is, implements the above-mentioned method. The memory 104 may include high speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include memory located remotely from the processor 102, which may be connected to the air conditioner via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The transmission device 106 is used to receive or transmit data via a network. Specific examples of the network described above may include a wireless network provided by a communication provider of the air conditioner. In one example, the transmission device 106 includes a Network adapter (NIC) that can be connected to other Network devices through a base station to communicate with the internet. In one example, the transmission device 106 may be a Radio Frequency (RF) module, which is used to communicate with the internet in a wireless manner.
In this embodiment, a method for detecting a lack of fluorine in an air conditioner is provided, and fig. 2 is a flowchart of a method for detecting a lack of fluorine in an air conditioner according to an embodiment of the present invention, as shown in fig. 2, the flowchart includes the following steps:
step S202, collecting a plurality of groups of real-time temperatures when the air conditioner operates;
in an embodiment of this embodiment, the real-time temperature is determined by a real-time detection value of 5 temperature sensors, optionally, the two sets of acquisition time in the multiple sets of real-time temperatures are the same time period as a detection period, and the multiple detection periods form a statistical period, where the preset number of times for satisfying the fluorine deficiency condition set in the statistical period can be set according to the condition of the air conditioner.
Step S204, judging whether the mass flow of the air conditioner is lower than a threshold value according to the multiple groups of real-time temperatures, wherein the mass flow is the mass of the refrigerant sucked or discharged into or out of the compressor in unit time;
in an embodiment of this embodiment, whether the air conditioner lacks fluorine is determined by whether the mass flow of the air conditioner is lower than a threshold value, a target difference between a temperature difference between the front and rear of a throttling device of the air conditioner and an environmental temperature difference is calculated by a calculation formula according to a plurality of sets of real-time temperatures, and the mass flow of the air conditioner is determined by calculating an exhaust superheat degree of the air conditioner.
And step S206, if the mass flow of the air conditioner is lower than a threshold value, determining that the air conditioner is lack of fluorine.
Through the steps, a plurality of groups of real-time temperatures when the air conditioner operates are collected, whether the mass flow of the air conditioner is lower than a threshold value or not is judged according to the plurality of groups of real-time temperatures, wherein the mass flow is the mass of a refrigerant sucked into or discharged from a compressor in unit time, if the mass flow of the air conditioner is lower than the threshold value, the air conditioner is determined to lack fluorine, the mass flow of the air conditioner is judged according to the plurality of groups of real-time temperatures of the air conditioner, if the mass flow of the air conditioner is lower than the threshold value, the fluorine lack is determined, whether the fluorine lack is detected based on the mass flow of the air conditioner, the technical problem that the detection accuracy of the fluorine lack in the related technology is low is solved, the mass flow of the air conditioner is calculated and judged by comprehensively judging the relationship among the plurality of groups of real-time temperatures, the real-time detection of whether the air conditioner lacks fluorine can be realized, and the influence of the environmental temperature is small, the accuracy is high.
In this embodiment, the collecting the real-time temperature of the air conditioner during operation includes: the exhaust temperature, the condenser outlet pipe temperature, the evaporator inlet pipe temperature, the indoor environment temperature and the outdoor environment temperature of the air conditioner during operation are collected.
Fig. 3 is a schematic structural diagram of temperature collection in the embodiment of the present invention, and the air conditioner of the embodiment includes: the system comprises a compressor, a condenser, an evaporator, a throttling assembly and a refrigerant pipeline connecting the compressor, the condenser is positioned in an outdoor environment, the evaporator is positioned in an indoor environment, an exhaust temperature sensor is attached to the outer wall of the refrigerant pipeline near an exhaust port of the compressor, and is used for collecting exhaust temperature and positioned in the outdoor environment; the cold outlet temperature sensor is attached to the outer wall of the refrigerant pipeline near the outlet of the condenser, is positioned in the outdoor environment and collects the temperature of the outlet pipe of the condenser; the evaporation temperature sensor is attached to the outer wall of a refrigerant pipeline near the inlet of the evaporator, is positioned in an indoor environment, and collects the temperature of an inlet pipe of the evaporator; the outer ring temperature sensor is positioned near the air inlet of the condenser and used for collecting the outdoor environment temperature; the inner ring temperature sensor is positioned near the air inlet of the evaporator and used for collecting indoor environment temperature.
In this embodiment, the determining whether the mass flow of the air conditioner is lower than the threshold value according to the plurality of sets of real-time temperatures includes:
s11, calculating a target difference value between the temperature difference between the front and the rear of a throttling device of the air conditioner and the environmental temperature difference according to a first group of real-time temperatures, and calculating the exhaust superheat degree of the air conditioner according to a second group of real-time temperatures, wherein the first group of real-time temperatures and the second group of real-time temperatures are collected in the same detection period;
through the steps, two groups of real-time temperatures are respectively calculated, a target difference value between the front and back temperature difference of the throttling device of the air conditioner and the environment temperature difference is obtained, the target difference value and the exhaust superheat degree of the air conditioner are obtained, the first group of real-time temperatures and the second group of real-time temperatures are collected in the same detection period, optionally, multiple groups of real-time temperatures are collected in the same statistical period, the real-time temperature values of every two groups are different from those of the previous two groups, and when the next statistical period is started, the multiple groups of real-time temperatures are collected again.
S12, if the target difference value in the current detection period is smaller than or equal to a first preset value and the exhaust superheat degree is larger than or equal to a second preset value, determining that the mass flow of the air conditioner is lower than a threshold value.
When the target difference value delta T1 between the front and rear temperature difference of the throttling device of the air conditioner and the environmental temperature difference is smaller than or equal to a first preset value and the exhaust superheat degree delta T2 of the air conditioner is larger than or equal to a second preset value, the mass flow of the air conditioner is considered to be lower than a threshold value, namely the air conditioner possibly has fluorine shortage, and when the condition is met once, the condition that the fluorine shortage is met can be judged.
When the air conditioner is severely deficient in fluorine, the refrigerant flow passing through the throttling device is very small, and at the moment, the temperature difference between the front and the rear of the throttling device detected by the temperature sensor attached to the outer surface of the refrigerant pipeline is obviously reduced relative to the value when the refrigerant is not deficient, namely, the target difference value delta T1 between the temperature difference between the front and the rear of the throttling device of the air conditioner and the environmental temperature difference is obviously reduced.
When the air conditioner is severely deficient in fluorine, the flow rate of refrigerant sucked and discharged by the compressor is very low, and at this time, the discharge temperature of the compressor detected by the temperature sensor attached to the outer surface of the refrigerant pipeline is remarkably increased relative to the value when the refrigerant is not deficient, that is, the discharge superheat degree Δ T2 of the air conditioner is remarkably increased. Δ T1 and Δ T2 are used to characterize the mass flow rate of the air conditioner in this embodiment.
In one example, the first preset value and the second preset value are determined by data of a large number of air conditioners running under different fluorine amounts under different working conditions, for example, a certain air conditioner, wherein the first preset value is a, the second preset value is B, when a is 10 ℃ and B is 25 ℃, the air conditioner can be ensured not to trigger fluorine-lacking error protection when the air conditioner is full of fluorine (100%) and slightly lacks fluorine (75%), and can be protected to stop in time when the air conditioner is seriously lacking fluorine (25%).
In this embodiment, the first set of real-time temperatures includes: condenser outlet pipe temperature TCold dischargeTemperature T of inlet pipe of evaporatorIs steamed intoIndoor ambient temperature TInner ringOutdoor ambient temperature TOuter ring(ii) a The second set of real-time temperatures includes the exhaust temperature TExhaust of gasesOutlet temperature T of condenserIs steamed intoAnd calculating a target difference value of the temperature difference between the front and the back of the throttling device of the air conditioner and the environment temperature difference according to the first group of real-time temperatures, wherein the target difference value comprises the following steps: the target difference Δ T is calculated using the following formula1：ΔT1＝(TCold discharge-TIs steamed into)-(TOuter ring-TInner ring)；
Condenser outlet temperature TCold dischargeAnd evaporator inlet temperature TIs steamed intoRespectively the temperature before and after the throttle device, TCold discharge-TIs steamed intoRepresenting the temperature difference between the front and the back of the throttling device of the air conditioner; because the condenser is located in outdoor environment and the evaporator is located in indoor environment, the temperature difference T between the internal environment and the external environment needs to be subtracted in consideration of the influence of the ambient temperature on the heat exchange effect of the heat exchangerOuter ring-TInner ring。
Calculating the superheat of the exhaust air of the air conditioner according to the second group of real-time temperatures comprises: the target difference Δ T is calculated using the following formula2：ΔT2＝TExhaust of gases-TCold discharge。
ΔT2＝TExhaust of gases-TCold dischargeAnd represents the exhaust superheat of the air conditioner. Generally, the superheat degree of the exhaust gas is considered to be equal to the difference between the exhaust temperature and the saturation temperature corresponding to the exhaust pressure, but some air conditioners are not provided with an exhaust pressure sensor, and the saturation temperature corresponding to the accurate exhaust pressure cannot be obtained, so that the outlet temperature of the condenser can be approximate to the saturation temperature corresponding to the exhaust pressure.
In this embodiment, if the mass flow of the air conditioner is lower than the threshold, determining that the air conditioner lacks fluorine includes:
if the mass flow of the air conditioner is lower than a threshold value, determining that the air conditioner meets a fluorine lack condition in the current detection period; controlling the air conditioner to perform midway shutdown protection within a first time length, and accumulating the times of fluorine deficiency of the air conditioner;
if the fluorine lack condition is not met in the steps, the real-time temperature collection can be continuously returned, wherein the first time length is optionally set to be 1 minute, the midway shutdown protection is to prevent judgment errors caused by accidental abnormal problems, the fluorine lack times of the air conditioner are accumulated, and optionally, the fluorine lack times of each statistical period can be set to be 3 times.
Judging whether the fluorine lack times of the air conditioner in the current statistical period reach preset times or not; if the times of fluorine deficiency of the air conditioner in the counting period reach preset times, determining that the air conditioner lacks fluorine; if the fluorine lack times of the air conditioner in the counting period do not reach the preset times, after the air conditioner is stopped and protected midway, whether the air conditioner meets the fluorine lack condition or not is continuously judged in the next detection period until the next counting period is started, wherein the duration of the counting period is longer than that of the detection period.
In order to prevent the air conditioner from triggering error protection in a short time due to sudden change of the external environment or sudden change of the frequency of the compressor, the protection needs to be continuously performed for a period of time t2, namely the condition that the fluorine deficiency condition is met is detected in the current detection period, and t2 can be 3-5 minutes; in order to prevent error protection caused by an abnormal problem occurring accidentally, the continuous time t3 is required to be met, namely, the accumulated times of meeting the fluorine-lacking condition in the statistical period reach a certain number, and t3 can be 27-48 minutes.
In this embodiment, after determining that the air conditioner is fluorine-deficient, the method further includes: and controlling the air conditioner to carry out fluorine-lacking protection shutdown, and outputting fluorine-lacking prompt information.
The steps are used for preventing the air conditioner from being stopped for protection in time when serious refrigerant leakage occurs after fluorine shortage occurs, and preventing the compressor from being damaged. Since the temperature of the compressor is increased due to insufficient cooling when severe leakage of refrigerant occurs, excessive temperature may cause carbonization of lubricating oil and damage to internal parts of the compressor. Therefore, the air conditioner needs to have a fluorine-deficient protection function.
Optionally, before collecting multiple sets of real-time temperatures during operation of the air conditioner, the method further includes: monitoring the starting operation time of the air conditioner; and when the starting operation time reaches a second time length, determining to acquire multiple groups of real-time temperatures of the air conditioner during operation.
In the above steps, the preset time for starting the air conditioner to operate is set as t1, and since the frequency change of the compressor is fast in the starting process of the air conditioner, each temperature parameter of the system is unstable, and at this time, fluorine deficiency judgment cannot be immediately performed, otherwise, false protection may be triggered; however, this time cannot be too long, since the compressor would be damaged if the air conditioner were operated for a long time without fluorine. Alternatively, t1 may be selected between 5-10 minutes to account for differences in the turn-on process of different air conditioners.
Fig. 4 is a flowchart of a control method for fluorine deficiency protection of an air conditioner in an embodiment of the present invention, including: setting the starting-up operation for preset time T1 according to the exhaust temperature TExhaust of gasesCondenser outlet pipe temperature TCold dischargeTemperature T of inlet pipe of evaporatorIs steamed intoIndoor ambient temperature TInner ringIndoor ambient temperature TOuter ringΔ T1 and Δ T2 were calculated. Judging whether the fluorine lack condition is met in a continuous time period, accumulating the times of meeting the fluorine lack in the continuous time t3, stopping the air conditioner for 1min, judging whether the preset fluorine lack times are met for 3 times, continuing to calculate in real time when the fluorine lack condition is not met or the fluorine lack times are not met, and stopping the air conditioner for protection and displaying related information simultaneously if the fluorine lack condition is met. Table 1 shows experimental data of a certain air conditioner according to the present invention when operating at different fluorine amounts under various working conditions:
TABLE 1
Adopt the scheme of this embodiment, lack fluorine detection technique accuracy is higher, through the relation between comprehensive judgement exhaust temperature, condenser outlet pipe temperature, evaporimeter import pipe temperature, indoor outer ambient temperature, calculates the mass flow who judges the air conditioner to confirm whether the air conditioner lacks fluorine, can realize lacking the real-time detection of fluorine to the air conditioner, and influenced by ambient temperature for a short time, the accuracy is high.
Through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by software plus necessary general mechanical equipment, and certainly can also be implemented by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solution of the present invention or the portions contributing to the prior art may be essentially embodied in the form of software controlled mechanical device, the software is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes several instructions for causing a mechanical device (air conditioner, etc.) to execute the method according to the embodiments of the present invention.
Example 2
In this embodiment, a fluorine deficiency detection device of an air conditioner is further provided, which is used to implement the foregoing embodiments and preferred embodiments, and the description of which is already given is omitted. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.
Fig. 5 is a block diagram of a fluorine deficiency detecting apparatus of an air conditioner according to an embodiment of the present invention, as shown in fig. 5, the apparatus includes: an acquisition module 50, a decision module 52, a determination module 54, wherein,
the acquisition module 50 is used for acquiring multiple groups of real-time temperatures when the air conditioner operates;
a judging module 52, configured to judge whether a mass flow of the air conditioner is lower than a threshold according to the multiple sets of real-time temperatures, where the mass flow is a mass of refrigerant sucked into or discharged from a compressor in a unit time;
and the determining module 54 is configured to determine that the air conditioner lacks fluorine if the mass flow of the air conditioner is lower than a threshold value.
Optionally, the collecting module includes: the first acquisition unit is used for acquiring the exhaust temperature, the outlet pipe temperature of the condenser, the inlet pipe temperature of the evaporator, the indoor environment temperature and the outdoor environment temperature when the air conditioner operates.
Optionally, the determining module includes: the air conditioner comprises a first calculation unit and a second calculation unit, wherein the first calculation unit is used for calculating a target difference value between the front and rear temperature difference of a throttling device of the air conditioner and the environmental temperature difference according to a first group of real-time temperatures; and the first determining unit is used for determining that the mass flow of the air conditioner is lower than a threshold value if the target difference value in the current detection period is smaller than or equal to a first preset value and the exhaust superheat degree is larger than or equal to a second preset value.
Optionally, the first set of real-time temperatures includes: condenser outlet pipe temperature TCold dischargeTemperature T of inlet pipe of evaporatorIs steamed intoIndoor ambient temperature TInner ringOutdoor ambient temperature TOuter ring(ii) a The second set of real-time temperatures includes the exhaust temperature TExhaust of gasesOutlet temperature T of condenserIs steamed intoWherein the first calculation unit includes: the target difference Δ T is calculated using the following formula1：ΔT1＝(TCold discharge-TIs steamed into)-(TOuter ring-TInner ring) (ii) a The second calculation unit includes: the target difference Δ T is calculated using the following formula2：ΔT2＝TExhaust of gases-TCold discharge。
Optionally, the determining module includes: the second determination unit is used for determining that the air conditioner meets the fluorine lack condition in the current detection period if the mass flow of the air conditioner is lower than a threshold value; the first control unit is used for controlling the air conditioner to carry out midway shutdown protection within a first time length, and the first counting unit is used for accumulating the times of fluorine shortage of the air conditioner; the first judgment unit is used for judging whether the fluorine lack times of the air conditioner in the current statistical period reach preset times or not; the third determining unit is used for determining that the air conditioner lacks fluorine if the times of fluorine deficiency of the air conditioner in the counting period reach preset times; and the second judging unit is used for continuously judging whether the air conditioner meets the fluorine lack condition in the next detection period until entering the next statistical period after the air conditioner is stopped and protected halfway until the second statistical period is started if the fluorine lack frequency of the air conditioner in the statistical period does not reach the preset frequency, wherein the duration of the statistical period is greater than that of the detection period.
Optionally, the apparatus further comprises: and the control module is used for controlling the air conditioner to carry out fluorine-lacking protection shutdown and outputting fluorine-lacking prompt information.
Optionally, the apparatus further comprises: the monitoring module is used for monitoring the starting operation time of the air conditioner; and the second determining module is used for determining and acquiring multiple groups of real-time temperatures of the air conditioner during operation when the starting operation time reaches a second time length.
It should be noted that, the above modules may be implemented by software or hardware, and for the latter, the following may be implemented, but not limited to: the modules are all positioned in the same processor; alternatively, the modules are respectively located in different processors in any combination.
Example 3
Embodiments of the present invention also provide a storage medium having a computer program stored therein, wherein the computer program is arranged to perform the steps of any of the above method embodiments when executed.
Alternatively, in the present embodiment, the storage medium may be configured to store a computer program for executing the steps of:
s1, collecting multiple groups of real-time temperatures of the air conditioner during operation;
s2, judging whether the mass flow of the air conditioner is lower than a threshold value according to the multiple groups of real-time temperatures, wherein the mass flow is the mass of the refrigerant sucked or discharged into or out of the compressor in unit time;
s3, if the mass flow of the air conditioner is lower than a threshold value, determining that the air conditioner is lack of fluorine.
Optionally, in this embodiment, the storage medium may include, but is not limited to: various media capable of storing computer programs, such as a usb disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk.
Embodiments of the present invention also provide an electronic device comprising a memory having a computer program stored therein and a processor arranged to run the computer program to perform the steps of any of the above method embodiments.
Optionally, the electronic device may further include a transmission device and an input/output device, wherein the transmission device is connected to the processor, and the input/output device is connected to the processor.
Optionally, in this embodiment, the processor may be configured to execute the following steps by a computer program:
s1, collecting multiple groups of real-time temperatures of the air conditioner during operation;
s2, judging whether the mass flow of the air conditioner is lower than a threshold value according to the multiple groups of real-time temperatures, wherein the mass flow is the mass of the refrigerant sucked or discharged into or out of the compressor in unit time;
s3, if the mass flow of the air conditioner is lower than a threshold value, determining that the air conditioner is lack of fluorine.
Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation manners, and this embodiment is not described herein again.
The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present application, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one type of division of logical functions, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The foregoing is only a preferred embodiment of the present application and it should be noted that those skilled in the art can make several improvements and modifications without departing from the principle of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.
Claims (10)
1. A fluorine deficiency detection method of an air conditioner is characterized by comprising the following steps:
collecting a plurality of groups of real-time temperatures during the operation of the air conditioner;
judging whether the mass flow of the air conditioner is lower than a threshold value according to the multiple groups of real-time temperatures, wherein the mass flow is the mass of a refrigerant sucked or discharged into or out of a compressor in unit time;
and if the mass flow of the air conditioner is lower than a threshold value, determining that the air conditioner is lack of fluorine.
2. The method of claim 1, wherein collecting the real-time temperature of the air conditioner during operation comprises:
the exhaust temperature, the condenser outlet pipe temperature, the evaporator inlet pipe temperature, the indoor environment temperature and the outdoor environment temperature of the air conditioner during operation are collected.
3. The method of claim 1, wherein determining whether the mass flow rate of the air conditioner is below a threshold value based on the plurality of sets of real-time temperatures comprises:
calculating a target difference value between the temperature difference between the front and the rear of a throttling device of the air conditioner and the environmental temperature difference according to a first group of real-time temperatures, and calculating the exhaust superheat degree of the air conditioner according to a second group of real-time temperatures, wherein the first group of real-time temperatures and the second group of real-time temperatures are collected in the same detection period;
and if the target difference value in the current detection period is smaller than or equal to a first preset value and the exhaust superheat degree is larger than or equal to a second preset value, determining that the mass flow of the air conditioner is lower than a threshold value.
4. The method of claim 3, wherein the first set of real-time temperatures comprises: condenser outlet pipeTemperature TCold dischargeTemperature T of inlet pipe of evaporatorIs steamed intoIndoor ambient temperature TInner ringOutdoor ambient temperature TOuter ring(ii) a The second set of real-time temperatures includes the exhaust temperature TExhaust of gasesOutlet temperature T of condenserIs steamed intoWherein, in the step (A),
calculating a target difference value between the temperature difference between the front and the back of the throttling device of the air conditioner and the environmental temperature difference according to the first group of real-time temperatures comprises the following steps:
the target difference Δ T is calculated using the following formula1：ΔT1＝(TCold discharge-TIs steamed into)-(TOuter ring-TInner ring)；
Calculating the superheat of the exhaust air of the air conditioner according to the second group of real-time temperatures comprises:
the target difference Δ T is calculated using the following formula2：ΔT2＝TExhaust of gases-TCold discharge。
5. The method of claim 1, wherein determining that the air conditioner is fluorine deficient if the mass flow rate of the air conditioner is below a threshold value comprises:
if the mass flow of the air conditioner is lower than a threshold value, determining that the air conditioner meets a fluorine lack condition in the current detection period;
controlling the air conditioner to perform midway shutdown protection within a first time length, and accumulating the times of fluorine deficiency of the air conditioner;
judging whether the fluorine lack times of the air conditioner in the current statistical period reach preset times or not;
if the times of fluorine deficiency of the air conditioner in the counting period reach preset times, determining that the air conditioner lacks fluorine; if the fluorine lack times of the air conditioner in the counting period do not reach the preset times, after the air conditioner is stopped and protected midway, whether the air conditioner meets the fluorine lack condition or not is continuously judged in the next detection period until the next counting period is started, wherein the duration of the counting period is longer than that of the detection period.
6. The method as set forth in claim 1, wherein after determining that the air conditioner is deficient in fluorine, the method further comprises:
and controlling the air conditioner to carry out fluorine-lacking protection shutdown, and outputting fluorine-lacking prompt information.
7. The method of claim 1, wherein before collecting the plurality of sets of real-time temperatures during operation of the air conditioner, the method further comprises:
monitoring the starting operation time of the air conditioner;
and when the starting operation time reaches a second time length, determining to acquire multiple groups of real-time temperatures of the air conditioner during operation.
8. A fluorine deficiency detection device of an air conditioner is characterized by comprising:
the acquisition module is used for acquiring a plurality of groups of real-time temperatures when the air conditioner operates;
the judging module is used for judging whether the mass flow of the air conditioner is lower than a threshold value according to the multiple groups of real-time temperatures, wherein the mass flow is the mass of refrigerant sucked or discharged into or out of a compressor in unit time;
and the determining module is used for determining that the air conditioner lacks fluorine if the mass flow of the air conditioner is lower than a threshold value.
9. A storage medium, characterized in that the storage medium comprises a stored program, wherein the program is operative to perform the method steps of any of the preceding claims 1 to 7.
10. An electronic device comprises a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory are communicated with each other through the communication bus; wherein:
a memory for storing a computer program;
a processor for performing the method steps of any of claims 1 to 7 by executing a program stored on a memory.
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