CN113623818B - Heating mode fluorine deficiency detection method and device, air conditioner and computer readable storage medium - Google Patents
Heating mode fluorine deficiency detection method and device, air conditioner and computer readable storage medium Download PDFInfo
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- CN113623818B CN113623818B CN202110844316.9A CN202110844316A CN113623818B CN 113623818 B CN113623818 B CN 113623818B CN 202110844316 A CN202110844316 A CN 202110844316A CN 113623818 B CN113623818 B CN 113623818B
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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
- F24F11/41—Defrosting; Preventing freezing
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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
- F24F11/38—Failure diagnosis
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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
- F24F11/56—Remote control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- 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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- 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
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- F24F11/63—Electronic processing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
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- F24F2110/12—Temperature of the outside air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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Abstract
The invention provides a heating mode fluorine deficiency detection method, a device, an air conditioner and a computer readable storage medium, wherein the control method is used for the air conditioner, and the detection method comprises the following steps: starting up, selecting heating mode, detecting inlet temperature T of outdoor heat exchanger 1 And the outlet temperature T 2 And calculating the temperature difference value delta T = T of the two 2 ‑T 1 Judging whether the actual temperature difference value delta T is within the preset temperature difference value delta T or not Threshold(s) If yes, according to the first preset time t 1 The defrosting times n in the air conditioner judge whether the air conditioner is lack of fluorine. According to the invention, whether the air conditioner is possibly in a fluorine-lacking state is preliminarily judged by detecting the temperature difference of the inlet and the outlet of the outdoor heat exchanger, and whether the air conditioner is fluorine-lacking is further judged by defrosting times of the air conditioner within a first preset time under different outdoor environment temperatures.
Description
Technical Field
The invention relates to the field of air conditioners, in particular to a heating mode fluorine deficiency detection method and device, an air conditioner and a computer readable storage medium.
Background
Fluorine is used as a refrigerant of the air conditioner and plays a vital role in the air conditioner, fluorine absorbs heat of a cooled medium (water, air and the like) in an evaporator to be vaporized, the heat is transferred to surrounding air or water in a condenser to be condensed, and then the temperature can be adjusted, so that the fluorine content in the air conditioner is vital in order to ensure normal adjustment of the temperature, the fluorine deficiency is also a common fault in the use of the air conditioner, if the air conditioner is operated for a long time after being deficient in fluorine, the air conditioner has poor refrigeration and heating effects, wastes electric energy and can cause overheating of a compressor, the long-time overheating can not only reduce the insulation performance and reliability of the motor and shorten the service life of the motor, but also can reduce the lubricating capacity of the lubricating oil, even cause carbonization and acidolysis of the lubricating oil, and seriously damage the compressor and influence the service life of the whole air conditioner.
The existing air conditioner mainly adopts the temperature difference value or power comparison of the inner tube for judging the fluorine-lacking protection, in fact, the temperature difference value of the inner tube is simply used as the judging condition of the fluorine-lacking protection, the temperature change of the inner tube is slow under the conditions of sufficient refrigerant and high humidity, the malfunction of the fluorine-lacking is easily caused, and the accuracy is not high; most of the existing air conditioners can trigger the fluorine-lacking protection function in a refrigeration mode, and are easy to be protected by mistake under the condition of no fluorine deficiency or little fluorine deficiency.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The invention solves the problem that in the prior art, most air conditioners can trigger the fluorine-lacking protection function in a refrigeration mode, and are easy to be protected by mistake under the condition of no fluorine deficiency or little fluorine deficiency.
In order to solve the problems, the invention discloses a heating mode fluorine deficiency detection method for an air conditioner, which comprises the following steps: starting up, selecting heating mode, detecting inlet temperature T of outdoor heat exchanger 1 And the outlet temperature T 2 And calculating the temperature difference value delta T = T of the two 2 -T 1 Judging whether the actual temperature difference value delta T is within the preset temperature difference value delta T or not Threshold(s) If yes, according to the first preset time t 1 The number n of times of defrosting in the air conditioner is judged to judge whether the air conditioner is lack of fluorine.
Setting a preset temperature difference value delta T Threshold(s) When the air conditioner lacks fluorine, the fluorine in the outdoor heat exchanger is fully gasified during heating, and the frosting speed of the outdoor heat exchanger is increased due to the increased circulation speed of the fluorine, so that the air conditioner can be used for judging whether the fluorine shortage phenomenon exists or not preliminarily, if the method is independently adopted for judgment, misjudgment is easy to occur, and accurate judgment needs to be carried out by matching with a further judgment method 1 The number of internal defrost times n being compared to the theoretical number of defrost times n 0 Also can rise, can be with whether lack fluorine of accurate judgement air conditioner according to this point to the air conditioner in time reacts, avoids the long-time operation of compressor under lacking the fluorine condition, also avoids appearing the improper shut down that the erroneous judgement leads to, has promoted user's use and has experienced, has also protected the safety in utilization of compressor effectively.
Further, the Δ T Threshold(s) The value of (A) is between 3 and 5 ℃.
The Δ T Threshold(s) The value of (2) is related to the energy efficiency of the air conditioner, because the compressor power and the consumption of refrigerant in the air conditioner are different, the temperature difference value of an inlet and an outlet of an outdoor unit of the air conditioner in the running process has certain difference, and the corresponding delta T can be set according to the type of the air conditioner Threshold(s) And (4) taking values.
Further, "according to the first preset time t 1 The step of judging whether the air conditioner is lack of fluorine by the internal defrosting times n specifically comprises the following steps: recording the first preset time t of the air conditioner 1 The number of times of defrosting n is calculated, and the difference value of the number of times of defrosting is calculated to be delta n = n-n 0 Judging whether the difference delta n of the defrosting times is within the preset difference delta n of the defrosting times Threshold value If yes, judging that the air conditioner is lack of fluorine; wherein n is 0 The theoretical number of defrost times is a preset value.
When the air conditioner lacks fluorine, the fluorine of the outdoor heat exchanger can be fully gasified during heating, so that the outdoor heat exchanger is in a place where the fluorine is deficientIn the overheat state, the flow speed of fluorine is increased, and the increase of the flow speed leads to the increase of the frosting speed of the outdoor heat exchanger, so that the air conditioner is in the preset time t 1 The number of internal defrost times n being compared to the theoretical number of defrost times n 0 The difference value of (2) can also be obviously increased, so that whether the air conditioner is lack of fluorine can be accurately judged, and the accuracy of judging lack of fluorine is greatly improved compared with the prior art.
Further, the theoretical defrosting time n 0 In negative correlation with the outdoor ambient temperature T, the difference Δ n of the preset defrosting times Threshold value Inversely related to the outdoor ambient temperature.
Along with the reduction of outdoor environment temperature T, the frosting period of the air conditioner is reduced, so that the defrosting times are increased, when the fluorine lack phenomenon occurs, the overheating condition of the outdoor heat exchanger of the air conditioner is more serious, so that the air conditioner is frequently subjected to defrosting operation, and accordingly, the fluorine lack condition of the air conditioner can be accurately detected by setting the detection method.
Further, when T > 5 ℃, Δ n Threshold value =1; when T is more than or equal to minus 5 ℃ and less than or equal to 5 ℃, delta n Threshold value =3; when T is less than 5 ℃, delta n Threshold(s) ＝5。
Because the theoretical defrosting times n of the air conditioner at different temperatures 0 The actual defrosting times n are different remarkably through delta n under different outdoor environment temperatures T Threshold(s) The arrangement of the air conditioner can accurately judge whether the air conditioner lacks fluorine at different outdoor temperatures, thereby obviously improving the accuracy of judging the lack of fluorine of the air conditioner.
Further, the first preset time t 1 The value range of (a) is 3 to 5 hours.
Since the frost formation and the defrosting of the outdoor heat exchanger of the air conditioner take a certain time, if t 1 If the value is too small, the air conditioner may not be defrosted or may be defrosted only once, which is not beneficial to the judgment of the fluorine lack condition of the air conditioner, and the problem that the fluorine lack is not detected may occur, if t is 1 The value is too large, and whether the air conditioner is lack of fluorine can be accurately detected, but the arrangement can cause the compressor to operate for a long time under the condition of lack of fluorineWhich is detrimental to the service life of the compressor.
Furthermore, after judging that the air conditioner is lack of fluorine, the fluorine lack protection function is executed.
The arrangement can ensure the normal shutdown of the air conditioner under the condition that the system lacks fluorine, thereby effectively protecting the compressor and improving the reliability of the air conditioning system.
The invention also discloses a heating mode fluorine deficiency detection device, which comprises: a temperature acquisition module at least used for detecting the inlet temperature T of the outdoor heat exchanger in the heating mode 1 Outlet temperature T 2 And an outdoor ambient temperature T;
a defrosting counting module for counting the first preset time t 1 The defrosting times n of the internal air conditioner;
a calculation module for calculating the inlet temperature T of the outdoor heat exchanger 1 And the outlet temperature T 2 Temperature difference value Δ T = T 2 -T 1 (ii) a And calculating the actual defrosting times n and the theoretical defrosting times n of the air conditioner 0 Difference of the number of defrosters Δ n = n-n 0 ；
A judging module for judging the actual temperature difference value delta T and the preset temperature difference value delta T Threshold(s) And determining the difference delta n between the defrosting times and the preset defrosting times Threshold(s) And inputting the judgment result into the control module;
and the control module is used for sending a control instruction according to the judgment result input by the judgment module, and the control instruction is used for fluorine deficiency detection in the heating mode.
Through the cooperation among the modules, when the air conditioner is in heating operation, whether the air conditioner is possibly lack of fluorine or not is preliminarily judged through the temperature difference delta T of the inlet and the outlet of the outdoor heat exchanger, and then the first preset time T is used 1 The defrosting times n of the inner air conditioner are accurately judged for two times, so that whether the air conditioner is lack of fluorine is accurately detected, the detection method is simple and practical, and the accuracy of detecting the lack of fluorine of the air conditioner is greatly improved.
The invention also discloses an air conditioner, which comprises a computer readable storage medium and a processor, wherein the computer readable storage medium is used for storing a computer program, and the computer program is read by the processor and runs to realize the heating mode fluorine deficiency detection method.
Compared with the prior art, the air conditioner and the heating mode fluorine deficiency detection method have the same advantages, and are not described again.
The invention also discloses a computer readable storage medium, which stores a computer program, and when the computer program is read and executed by a processor, the heating mode fluorine deficiency detection method is realized.
Compared with the prior art, the heating mode fluorine deficiency detection method, the heating mode fluorine deficiency detection device, the air conditioner and the computer readable storage medium have the following advantages:
when the air conditioner is in a heating mode, the temperature difference of the inlet and the outlet of the outdoor heat exchanger is detected to preliminarily judge whether the air conditioner is possibly in a fluorine-lacking state, and then whether the air conditioner is fluorine-lacking is further judged according to the defrosting times of the air conditioner in the first preset time under different outdoor environment temperatures.
Drawings
Fig. 1 is a schematic flow chart of a heating mode fluorine deficiency detection method according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The specific embodiments described herein are merely illustrative of the invention and do not delimit the invention. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The heating mode fluorine deficiency detection method, apparatus, air conditioner and computer readable storage medium according to the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Example 1
The embodiment provides a heating mode fluorine deficiency detection method for an air conditioner, as shown in fig. 1, the detection method includes: starting up, selecting heating mode, detecting inlet temperature T of outdoor heat exchanger 1 And the outlet temperature T 2 And calculating the temperature difference value delta T = T of the two 2 -T 1 Judging whether the actual temperature difference value delta T is within the preset temperature difference value delta T or not Threshold value If yes, according to the first preset time t 1 The defrosting times n in the air conditioner judge whether the air conditioner is lack of fluorine.
The method comprises the following specific steps:
step S1: starting up;
step S2: selecting a heating mode;
and step S3: detecting inlet temperature T of outdoor heat exchanger 1 And the outlet temperature T 2 And calculating the temperature difference value delta T = T of the two 2 -T 1 ；
And step S4: judging whether the actual temperature difference value delta T is within a preset temperature difference value delta T or not Threshold(s) If so, executing the step S5;
step S5: if yes, according to the first preset time t 1 Judging whether the air conditioner lacks fluorine by the defrosting times n, if yes, executing the step S6, and if not, returning to the step S3;
step S6: and executing the fluorine-lacking protection function.
Normally, when the air conditioner is in a heating mode, in order to prevent the condition of liquid return of the compressor, the refrigerant in the outdoor heat exchanger needs to be completely gasified and then enters the compressor, ideally, when the delta T =0, namely, the outdoor heat exchanger reaches the equilibrium state of complete gasification of fluorine, however, in consideration of the heat loss along the way in the fluorine circulation process, the delta T is usually required to be more than 0 so as to avoid the condition that the compressor sucks in liquid to cause damage, but when the delta T is higher to a certain degree, namely, the superheat degree of the outdoor heat exchanger is excessively high, the fluorine amount in the circulation process is insufficient, and the condition is probably caused by the lack of a system, and the condition is that the fluorine amount in the circulation process is insufficientFluorine causes, and possibly other causes, and therefore, the preset temperature difference Δ T may be set Threshold(s) The method helps to preliminarily judge whether the phenomenon of fluorine shortage exists or not, if the method is independently adopted for judgment, misjudgment is easy to occur, and the method needs to be matched with a further judgment method for accurate judgment 1 The number of defrost cycles n is compared to the theoretical number of defrost cycles n 0 The method can also be used for accurately judging whether the air conditioner lacks fluorine according to the point so that the air conditioner can timely react, the long-time running of the compressor under the condition of fluorine deficiency is avoided, the abnormal shutdown caused by misjudgment is also avoided, the use experience of a user is improved, and the use safety of the compressor is effectively protected.
In the present embodiment, "according to the first preset time t 1 The step of judging whether the air conditioner is lack of fluorine by the internal defrosting times n specifically comprises the following steps:
recording the first preset time t of the air conditioner 1 The number of times of defrosting n is calculated, and the difference value of the number of times of defrosting is calculated to be delta n = n-n 0 Judging whether the difference delta n of the defrosting times is within the preset difference delta n of the defrosting times Threshold(s) If yes, judging that the air conditioner lacks fluorine; wherein n is 0 The theoretical number of defrost times is a preset value.
That is, step S5 specifically includes:
step S51: recording a first preset time t 1 The number of times of defrosting of the interior air conditioner is calculated, and the difference value of the number of times of defrosting is calculated to be delta n = n-n 0 ；
Step S52: judging whether the difference value delta n of the defrosting times is within the preset difference value delta n of the defrosting times or not Threshold(s) If yes, judging that the air conditioner lacks fluorine, and executing step S6; if not, returning to execute the step S3.
When the air conditioner lacks fluorine, the room is heatedThe fluorine in the outer heat exchanger is fully gasified, so that the outdoor heat exchanger is in an overheated state, the flow speed of the fluorine is increased, the increase of the flow speed of the fluorine causes the frosting speed of the outdoor heat exchanger to be increased, and the air conditioner is in the preset time t 1 The number of internal defrost times n being compared to the theoretical number of defrost times n 0 The difference value of (2) can also be obviously increased, so that whether the air conditioner is lack of fluorine can be accurately judged, and the accuracy of judging lack of fluorine is greatly improved compared with the prior art.
In some of these embodiments, the theoretical number of defrosters n 0 In negative correlation with the outdoor ambient temperature T, the difference Δ n of the preset defrosting times Threshold(s) Inversely related to the outdoor ambient temperature, i.e. when the outdoor ambient temperature T increases, the theoretical number of defrost times n 0 And a preset defrosting time difference delta n Threshold(s) Gradually decreases, when the outdoor environment temperature decreases, the theoretical defrosting time n 0 And a preset defrosting time difference delta n Threshold value Gradually increasing. Along with the reduction of outdoor environment temperature T, the frosting period of the air conditioner is reduced, so that the defrosting times are increased, when the fluorine lack phenomenon occurs, the overheating condition of the outdoor heat exchanger of the air conditioner is more serious, so that the air conditioner is frequently subjected to defrosting operation, and accordingly, the fluorine lack condition of the air conditioner can be accurately detected by setting the detection method.
As an embodiment of the present invention, Δ n is measured when T > 5 deg.C Threshold(s) =1; when T is more than or equal to minus 5 ℃ and less than or equal to 5 ℃, delta n Threshold value =3; when T is less than 5 ℃, delta n Threshold(s) And (5). Because the theoretical defrosting times n of the air conditioner at different temperatures 0 The actual defrosting times n are different remarkably through delta n under different outdoor environment temperatures T Threshold(s) The arrangement of the air conditioner can accurately judge whether the air conditioner lacks fluorine at different outdoor temperatures, thereby obviously improving the accuracy of judging the lack of fluorine of the air conditioner.
In some of these embodiments, the Δ T Threshold value Is between 3 and 5 ℃, in particular, the delta T Threshold(s) The value of (A) is related to the energy efficiency of the air conditioner, because the compressor power and the consumption of refrigerant in the air conditioner are different, the temperature difference between the inlet and the outlet of the outdoor unit of the air conditioner is different in the running processThere may be some difference in value, in one embodiment, Δ T for an energy efficient model Threshold(s) At 3 deg.C, low energy efficiency Threshold value At 5 ℃ for a medium energy efficiency model Threshold(s) At 4 ℃, usually when the actually detected Δ T ≧ Δ T Threshold(s) In time, it may be preliminarily determined that the air conditioner may lack fluorine.
In this embodiment, the first preset time t 1 Preferably, t is in the range of 3 to 5 hours 1 =4 hours, the above time range is obtained by a person skilled in the art according to a plurality of experiments, and a certain time is required for the outdoor heat exchanger of the air conditioner to frost and defrost if t 1 If the value is too small, the air conditioner may not defrost or only defrost once, which is not favorable for judging the condition of fluorine lack of the air conditioner, and the problem of fluorine lack but not detection may occur, if t is too small 1 The value is too large, and whether the air conditioner is lack of fluorine can be accurately detected, but the arrangement can cause the compressor to operate for a long time under the condition of lack of fluorine, and is not beneficial to the service life of the compressor.
As a preferred embodiment, the air conditioner is operated for a second preset time t when being started 2 Then, the inlet temperature T of the outdoor heat exchanger is detected 1 And the outlet temperature T 2 . Namely, after the air conditioner is started to operate for a second preset time t2, the fluorine deficiency detection of the air conditioner is started, wherein the second preset time t 2 The value range of (a) is 6-10 minutes, preferably 8 minutes, because the compressor is just started in the starting stage of the air conditioner, the running state of the air conditioner is unstable, the temperature difference of the inlet and the outlet of the outdoor heat exchanger is easy to fluctuate at the moment, and when the air conditioner runs for a second preset time t 2 And then, the operation of the compressor tends to be stable, the temperature difference of the inlet and the outlet of the outdoor heat exchanger is also in a stable state, and the fluorine deficiency detection of the air conditioner is started at the moment to obtain a more accurate detection result.
In the embodiment, after the air conditioner is judged to lack fluorine, the fluorine-lack protection function is executed, and the air conditioner can be ensured to be normally shut down under the condition that the system lacks fluorine, so that the compressor is effectively protected, and the reliability of an air conditioning system is improved.
Optionally, when the air conditioner carries out lack fluorine protect function, send tip information simultaneously to remind user's air conditioner to be in lacking fluorine state, make it in time fill fluorine, thereby guarantee the normal operating of air conditioner, tip information includes but is not only limited to pronunciation, buzzing, word display, code display, and in the air conditioner that has the WIFI function, tip information also can be for the notice message in the APP or send to mobile terminal with the SMS mode, mobile terminal includes but not limited to cell-phone, panel computer, thereby makes the user in time learn that the air conditioner is in lacking fluorine state.
The heating mode fluorine deficiency detection method provided by the present embodiment may be used in both fixed-frequency and inverter air conditioners, and is preferably used in fixed-frequency air conditioners because conventional inverter air conditioners have many protective functions and the conventional outdoor units of fixed-frequency air conditioners are not provided with temperature, pressure, and the like.
Example 2
The embodiment discloses a heating mode fluorine deficiency detection device, which is used for realizing the heating mode fluorine deficiency detection method in the embodiment 1.
The heating mode lacks fluorine detection device includes:
a temperature acquisition module at least used for detecting the inlet temperature T of the outdoor heat exchanger in the heating mode 1 Outlet temperature T 2 And an outdoor ambient temperature T; in some embodiments, the temperature acquisition module is a temperature sensor or a temperature sensing bulb;
a defrosting counting module for counting a first preset time t 1 The defrosting times n of the internal air conditioner;
a calculation module for calculating the inlet temperature T of the outdoor heat exchanger 1 And the outlet temperature T 2 Temperature difference value Δ T = T 2 -T 1 (ii) a And calculating the actual defrosting times n and the theoretical defrosting times n of the air conditioner 0 Difference of the number of defrosters Δ n = n-n 0 ；
A judging module for judging the actual temperature difference value delta T and the preset temperature difference value delta T Threshold(s) And determining the difference delta n between the defrosting times and the preset defrosting times Threshold value And inputting the judgment result into the control module;
and the control module is used for sending a control instruction according to a judgment result input by the judgment module, wherein the control instruction is used for fluorine lack detection in the heating mode.
Through the cooperation among the modules, when the air conditioner is in heating operation, whether the air conditioner is possibly lack of fluorine is preliminarily judged through the temperature difference delta T of the inlet and the outlet of the outdoor heat exchanger, and then the first preset time T is passed 1 The defrosting times n of the inner air conditioner are accurately judged for two times, so that whether the air conditioner is lack of fluorine is accurately detected, the detection method is simple and practical, and the accuracy of detecting the lack of fluorine of the air conditioner is greatly improved.
Example 3
The embodiment discloses an air conditioner, which comprises the heating mode fluorine lack detection device in the embodiment 2.
The air conditioner disclosed in the present embodiment includes a computer readable storage medium storing a computer program and a processor, wherein the computer program is read and executed by the processor to implement the heating mode fluorine deficiency detection method as described in embodiment 1.
The advantages of the air conditioner and the heating mode fluorine deficiency detection method described in embodiment 1 are the same as those of the prior art, and are not described herein again.
Example 4
The embodiment discloses 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 heating mode fluorine deficiency detection method according to embodiment 1.
Although the present invention is disclosed above, the present invention is not limited thereto. In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. A heating mode fluorine lack detection method is characterized by being used for an air conditioner, and the detection method comprises the following steps: starting up, selecting heating mode, detecting inlet temperature T of outdoor heat exchanger 1 And the outlet temperature T 2 And calculating the temperature difference value delta T = T of the two 2 -T 1 Judging whether the actual temperature difference value delta T is within the preset temperature difference value delta T or not Threshold(s) If yes, according to the first preset time t 1 Judging whether the air conditioner lacks fluorine or not by the internal defrosting times n;
wherein, according to the first preset time t 1 The step of judging whether the air conditioner is lack of fluorine by the internal defrosting times n specifically comprises the following steps:
recording the first preset time t of the air conditioner 1 The number of times of defrosting n is calculated, and the difference value of the number of times of defrosting is calculated to be delta n = n-n 0 Judging whether the difference delta n of the defrosting times is within the preset difference delta n of the defrosting times Threshold(s) If yes, judging that the air conditioner lacks fluorine; wherein n is 0 The theoretical defrosting times are preset values;
the theoretical number of defrosting times n 0 In negative correlation with the outdoor ambient temperature T, the difference Δ n of the preset defrosting times Threshold(s) Inversely related to the outdoor ambient temperature.
2. The heating mode fluorine deficiency detection method according to claim 1, wherein the Δ T threshold is between 3~5 ℃.
3. The heating mode fluorine deficiency detection method according to claim 1,
when T > 5 ℃, delta n Threshold(s) =1；
When T is more than or equal to minus 5 ℃ and less than or equal to 5 ℃, delta n Threshold(s) =3；
When T is less than 5 ℃, delta n Threshold(s) =5。
4. The heating mode fluorine deficiency detection method according to any one of claims 1 to 3, wherein the first preset time t 1 The value range of (a) is 3~5 hours.
5. The heating mode fluorine deficiency detection method according to claim 4, wherein a fluorine deficiency protection function is performed when it is judged that the air conditioner is fluorine deficiency.
6. A heating mode fluorine deficiency detection apparatus employing the heating mode fluorine deficiency detection method according to any one of claims 1 to 5, comprising:
a temperature acquisition module at least used for detecting the inlet temperature T of the outdoor heat exchanger in the heating mode 1 Outlet temperature T 2 And an outdoor ambient temperature T;
a defrosting counting module for counting the first preset time t 1 The defrosting times n of the internal air conditioner;
a calculation module for calculating the inlet temperature T of the outdoor heat exchanger 1 And the outlet temperature T 2 Temperature difference value Δ T = T 2 -T 1 (ii) a And calculating the actual defrosting times n and the theoretical defrosting times n of the air conditioner 0 Difference of the number of defrosters Δ n = n-n 0 ；
A judging module for judging the actual temperature difference value delta T and the preset temperature difference value delta T Threshold(s) And determining the difference delta n between the defrosting times and the preset defrosting times Threshold(s) And inputting the judgment result into the control module;
and the control module is used for sending a control instruction according to the judgment result input by the judgment module, and the control instruction is used for fluorine deficiency detection in the heating mode.
7. 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 a heating mode fluorine deficiency detection method according to any one of claims 1 to 5.
8. A computer-readable storage medium, characterized in that it stores a computer program which, when read and executed by a processor, implements a heating mode fluorine deficiency detection method as claimed in any one of claims 1 to 5.
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