Method for detecting lack of fluorine in air conditioning system and air conditioner

Abstract

The application provides a method for detecting lack of fluorine in an air conditioning system and an air conditioner. The method comprises the following steps: S1, starting; S2, receiving a detection lack of fluorine instruction; S3, running the air conditioner in a refrigeration mode, the indoor fan is in the highest wind gear, and the air conditioner is run for a first preset time t1 under a rated voltage; and S4, judging the lack of fluorine in the air conditioning system according to a compression ratio M and a suction temperature T3. Compared with the prior art, the method for detecting the lack of fluorine in the air conditioning system has the following advantages: 1. a method for detecting the lack of fluorine in the air conditioning system is provided; 2. the method can timely understand the refrigerant condition of the whole system, timely and effectively find whether the air conditioner lacks fluorine, ensure normal use of the user, and facilitate timely maintenance after sale; and 3. the method judges the lack of fluorine in the air conditioning system according to the compression ratio M and the suction temperature T3, thereby improving the accuracy and precision of the air conditioning system in judging whether the air conditioner lacks fluorine.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of air conditioners, in particular to a method for detecting lack of fluorine in an air conditioning system and an air conditioner. BACKGROUND

[0002] At present, air conditioners generally use refrigerant phase change refrigeration / heat, and freon is the blood circulating in the entire air conditioning system. Due to installation methods and pipe welding quality, air conditioners may have refrigerant leakage problems. If there is a lack of fluorine, the air conditioner will have poor refrigeration and heating effects, the compressor winding temperature will be too high, and the protection will stop, which will affect normal use by users. At present, there is no method for detecting whether the air conditioning system lacks fluorine, which cannot guarantee normal use by users and is not convenient for after-sales maintenance.

[0003] Therefore, the present application is proposed. SUMMARY

[0004] The present application aims to provide a method for detecting lack of fluorine in an air conditioning system and an air conditioner to solve the problem that there is no method for detecting whether the air conditioning system lacks fluorine in the prior art, which cannot guarantee normal use by users and is not convenient for after-sales maintenance.

[0005] To achieve the above-mentioned purpose, the technical solution of the present application is as follows:

[0006] A method for detecting lack of fluorine in an air conditioning system, the method for detecting lack of fluorine in an air conditioning system comprising the following steps:

[0007] S1, starting;

[0008] S2, receiving a detection lack of fluorine instruction;

[0009] S3, the air conditioner runs in a refrigeration mode, the indoor fan is at the highest wind speed, the position of the air deflector is default, and the air conditioner runs for a first preset time t1 under rated voltage;

[0010] S4, judging the lack of fluorine in the air conditioning system according to the compression ratio M and the suction temperature T3.

[0011] The method for detecting lack of fluorine in an air conditioning system provided by the present application has the following advantages: first, a method for detecting lack of fluorine in an air conditioning system is provided; second, the method can timely understand the refrigerant condition of the entire system, timely and effectively find out whether the air conditioner lacks fluorine, guarantee normal use by users, and facilitate timely maintenance after sales; third, the method judges the lack of fluorine in the air conditioning system according to the compression ratio M and the suction temperature T3, which can not only judge whether the air conditioning system lacks fluorine, but also accurately judge the range of the lack of fluorine in the air conditioning system when the air conditioning system lacks fluorine, thereby improving the accuracy and precision of the determination of whether the air conditioning system lacks fluorine.

[0012] The method for detecting the lack of fluorine in the air conditioning system, steps S1 to S4 are interrelated and cannot be separated; through step S3, the air conditioner is operated in a refrigeration mode, the indoor fan is in the highest wind gear, and the first preset time t1 is operated under the rated voltage; in the refrigeration mode, false judgment can be avoided, and it is more intuitive to judge whether the fluorine is lacking in the refrigeration mode; then, through step S4, the air conditioning system is judged in a fluorine lack judgment mode according to the compression ratio M and the suction temperature T3; the combination of the compression ratio M and the suction temperature T3 can avoid false judgment, and the accuracy and precision of the air conditioning system in judging whether the fluorine is lacking are improved.

[0013] Further, step S4 includes the following steps:

[0014] S41, the evaporation pressure P1 and the condensation pressure P2 are obtained;

[0015] S42, the compression ratio M is calculated, the compression ratio M is equal to the condensation pressure P2 / the evaporation pressure P1, and whether the first compression ratio threshold a is less than or equal to the compression ratio M and whether the second compression ratio threshold b is greater than or equal to the compression ratio M are judged; if yes, step S43 is entered; if no, step S44 is entered;

[0016] S43, the first fluorine lack judgment mode is combined with the suction temperature T3;

[0017] S44, whether the compression ratio M is greater than the second compression ratio threshold b is judged; if yes, step S45 is entered;

[0018] S45, the second fluorine lack judgment mode is combined with the suction temperature T3.

[0019] Steps S41 to S45 are interrelated and cannot be separated, the evaporation pressure P1 and the condensation pressure P2 are obtained through step S41, the compression ratio is calculated, whether the first compression ratio threshold a is less than or equal to the compression ratio M and whether the second compression ratio threshold b is greater than or equal to the compression ratio M are judged through the calculation and judgment of the compression ratio M through step S42, and whether the compression ratio M is greater than the second compression ratio threshold b is judged through step S44, so that the air conditioning system enters different fluorine lack judgment modes according to different compression ratio ranges, and the accuracy and precision of the air conditioning system in judging whether the fluorine is lacking are improved.

[0020] Further, step S43 includes the following steps:

[0021] S431, the suction temperature T3 is obtained;

[0022] S432, whether the suction temperature T3 is less than the first suction temperature threshold c is judged; if yes, step S433 is entered; if no, step S434 is entered;

[0023] S433, the air conditioning system is normal and no fluorine lack phenomenon occurs;

[0024] S434, judging whether the suction temperature T3 is less than a second suction temperature threshold d; if yes, entering step S435;

[0025] S435, the air conditioning system lacks fluorine ≤ 30%, the system maintains the current mode operation, and a warning signal needs to be sent to the air conditioning control system, and the air conditioner stops running after the whole machine continuously runs for a second preset time t2.

[0026] Steps S431-S435 are associated with each other and cannot be separated. On the basis of the judgment of the compression ratio in step S42, the detection and judgment of the suction temperature T3 in steps S431 and S432 are combined to judge whether the suction temperature T3 is less than the first suction temperature threshold c, which can avoid misjudgment and can judge whether the air conditioning system lacks fluorine. When the suction temperature T3 is less than the first suction temperature threshold c, it indicates that the air conditioning system is normal and does not appear to lack fluorine, and step S433 is entered. When the suction temperature T3 is greater than or equal to the first suction temperature threshold c, it indicates that the air conditioning system appears to lack fluorine, and step S434 is entered. The judgment of whether the suction temperature T3 is less than the second suction temperature threshold d in step S434 can accurately judge the range of the amount of fluorine lacking in the air conditioning system, and further improves the accuracy and precision of the judgment of whether the air conditioning system lacks fluorine. When the suction temperature T3 is less than the second suction temperature threshold d, step S435 is entered, which indicates that the air conditioning system lacks fluorine ≤ 30%, the system maintains the current mode operation, but the refrigeration effect will decrease, and a warning signal needs to be sent to the air conditioning control system, such as flashing of the corresponding control lamp of the mainboard, and the air conditioner stops running after the whole machine continuously runs for a second preset time t2. The reliability of the whole machine can be ensured because the high exhaust gas and high temperature of the compressor winding will appear in the case of less refrigerant, which affects the reliability of the whole machine.

[0027] Further, step S45 includes the following steps:

[0028] S451, obtaining the suction temperature T3;

[0029] S452, judging whether the suction temperature T3 is greater than the second suction temperature threshold d; if yes, entering step S453;

[0030] S453, the air conditioning system lacks fluorine > 60%, the air conditioner immediately stops running and sends a fluorine lacking signal through the whole machine controller.

[0031] The steps S451-S453 are interrelated and inseparable. After determining the compression ratio in step S44, the detection of the suction temperature T3 in combination with steps S451 and S452 determines whether the suction temperature T3 is greater than the second suction temperature threshold d, which can avoid misjudgment, accurately determine the range of the lack of fluorine in the air conditioning system, and further improve the accuracy and precision of the air conditioning system in determining whether the fluorine is lacking. When the suction temperature T3 is greater than the second suction temperature threshold d, step S453 is entered, indicating that the air conditioning system lacks fluorine greater than 60%, and the air conditioning stops running immediately and sends a fluorine deficiency signal through the whole machine controller. On the one hand, it can ensure the reliability of the air conditioner, and on the other hand, the fluorine deficiency signal can be displayed on the indoor display screen (such as P3 code), which can remind the user and the after-sales maintenance personnel that the air conditioning system lacks fluorine at this time, and the machine operation can be restored after recharging the refrigerant or picking up the leak.

[0032] Further, step S1 includes the following steps:

[0033] S11, obtaining the indoor environment temperature T1 and the inner tube temperature T2;

[0034] S12, calculating the absolute value of the temperature difference between the indoor environment temperature and the inner tube temperature |T1-T2|, and determining whether |T1-T2|≤ the first temperature change threshold K1, if yes, then entering step S13;

[0035] S13, starting.

[0036] Through the detection of the indoor environment temperature T1 and the inner tube temperature T2 in step S11, it is convenient to determine whether |T1-T2|≤ the first temperature change threshold K1 in step S12. When |T1-T2|≤ the first temperature change threshold K1, step S13 is entered to start, because the inner tube temperature and the indoor environment temperature may have a large difference under different working conditions. If there is no start condition, the inner tube temperature may need a period of time to reduce or rise after starting, and this period of time is also included in the determination time range. Through steps S11-S13, the start condition is set, and when |T1-T2|≤ the first temperature change threshold K1, the air conditioning system can determine whether the fluorine is lacking in time.

[0037] Further, the first compression ratio threshold a has a value range of [1, 3].

[0038] The value of the first compression ratio threshold a is set in the above range, which can not only accurately determine whether the air conditioning system lacks fluorine, but also accurately determine the range of the lack of fluorine in the air conditioning system.

[0039] Further, the second compression ratio threshold b has a value range of [5, 9].

[0040] The second compression ratio threshold b is set in the above range, which can not only accurately determine whether the air conditioning system is short of fluorine, but also accurately determine the range of the amount of fluorine shortage of the air conditioning system.

[0041] Further, the first suction temperature threshold c has a value range of [18, 22], and the unit of the first suction temperature threshold c is ℃.

[0042] The first suction temperature threshold c is set in the above range, which can not only accurately determine whether the air conditioning system is short of fluorine, but also accurately determine the range of the amount of fluorine shortage of the air conditioning system.

[0043] Further, the second suction temperature threshold d has a value range of [28, 32], and the unit of the second suction temperature threshold d is ℃.

[0044] The second suction temperature threshold d is set in the above range, which can not only accurately determine whether the air conditioning system is short of fluorine, but also accurately determine the range of the amount of fluorine shortage of the air conditioning system.

[0045] In the second aspect of the present application, an air conditioner is provided, which comprises an outdoor unit and an indoor unit, and an indoor fan is arranged on the indoor unit, and the air conditioner uses any one of the methods for detecting fluorine shortage of the air conditioning system.

[0046] The present application provides a method for detecting fluorine shortage of an air conditioning system and an air conditioner, which has the following beneficial effects compared with the prior art:

[0047] 1) The method for detecting fluorine shortage of the air conditioning system and the air conditioner, I, provides a method for detecting fluorine shortage of the air conditioning system, II, through the detection method, the refrigerant condition of the whole system can be known in time, the purpose of timely and effectively finding out whether the air conditioner is short of fluorine is achieved, the normal use of the user is ensured, and the abnormality is handled in time after the sale; III, the air conditioning system fluorine shortage judgment mode is combined according to the compression ratio M and the suction temperature T3, which can not only determine whether the air conditioning system is short of fluorine, but also accurately determine the range of the amount of fluorine shortage of the air conditioning system when the air conditioning system is short of fluorine, thereby improving the accuracy and precision of the air conditioning system in determining whether it is short of fluorine.

[0048] 2) The method for detecting lack of fluorine in an air conditioning system and the air conditioner, the method for detecting lack of fluorine in an air conditioning system, steps S1-S4 are interrelated and cannot be separated, step S3 is to run the air conditioner in a cooling mode, the indoor fan is in the highest wind gear, and the first preset time t1 is run under the rated voltage; in the cooling mode, false judgment can be avoided, and it is more intuitive to judge whether the fluorine is lacking in the cooling mode; then, step S4 is to judge the lack of fluorine in the air conditioning system according to the compression ratio M and the suction temperature T3; the compression ratio M and the suction temperature T3 are combined to determine, false judgment can be avoided, and the accuracy and precision of the air conditioning system in determining whether the fluorine is lacking are improved. BRIEF DESCRIPTION OF DRAWINGS

[0049] Figure 1 The flowchart of the method for detecting lack of fluorine in an air conditioning system is shown in the embodiment of the present application. DETAILED DESCRIPTION

[0050] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The description of "first", "second", etc. in the embodiments of the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features with "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0051] The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0052] Embodiment 1

[0053] The present embodiment proposes a method for detecting lack of fluorine in an air conditioning system, as shown in the figure, the method for detecting lack of fluorine in an air conditioning system comprises the following steps: Figure 1

[0054] S1, start;

[0055] S2, receive detection of lack of fluorine instruction;

[0056] S3, the air conditioner runs in a cooling mode, the indoor fan is in the highest wind gear, the air deflector position is default, and the first preset time t1 is run under the rated voltage;

[0057] S4, according to the compression ratio M and the suction temperature T3, the air conditioning system is judged in a lack of fluorine mode.

[0058] ​The method for detecting lack of fluorine in the air conditioning system provided by the embodiment, one, provides a method for detecting lack of fluorine in the air conditioning system, two, through the detection method, the refrigerant condition of the whole machine system can be known in time, the purpose of timely and effectively finding out whether the air conditioning lacks fluorine is achieved, normal use of the user is ensured, and abnormality is handled in time after sale; three, the lack of fluorine in the air conditioning system is judged according to the compression ratio M and the suction temperature T3, not only whether the air conditioning system lacks fluorine can be judged, but also the range of the amount of lack of fluorine in the air conditioning system can be accurately judged when the air conditioning system lacks fluorine, the accuracy and precision of the air conditioning system in judging whether the fluorine is lacking are improved.

[0059] The method for detecting lack of fluorine in the air conditioning system provided by the embodiment, steps S1 to S4 are associated with each other and cannot be separated, the air conditioning is run in the refrigeration mode through step S3, the indoor fan is in the highest wind gear and the position of the air deflector is default, and the air conditioning is run for a first preset time t1 under the rated voltage; whether the fluorine is lacking can be judged more intuitively in the refrigeration mode, and misjudgment can be avoided in the refrigeration mode; then the lack of fluorine in the air conditioning system is judged according to the compression ratio M and the suction temperature T3 through step S4; the compression ratio M and the suction temperature T3 are combined to determine, misjudgment can be avoided, and the accuracy and precision of the air conditioning system in judging whether the fluorine is lacking are improved.

[0060] Specifically, step S4 includes the following steps:

[0061] S41, the evaporation pressure P1 and the condensation pressure P2 are obtained;

[0062] S42, the compression ratio M is calculated, the compression ratio M is equal to the condensation pressure P2 / the evaporation pressure P1, whether the first compression ratio threshold a is less than or equal to the compression ratio M and whether the second compression ratio threshold b is greater than or equal to the compression ratio M are judged; if yes, step S43 is entered; if no, step S44 is entered;

[0063] S43, the first lack of fluorine judgment mode is combined with the suction temperature T3;

[0064] S44, whether the compression ratio M is greater than the second compression ratio threshold b is judged; if yes, step S45 is entered;

[0065] S45, the second lack of fluorine judgment mode is combined with the suction temperature T3.

[0066] Steps S41 to S45 are associated with each other and cannot be separated, the evaporation pressure P1 and the condensation pressure P2 are obtained through step S41, the compression ratio is calculated, whether the first compression ratio threshold a is less than or equal to the compression ratio M and whether the second compression ratio threshold b is greater than or equal to the compression ratio M are judged through step S42, and whether the compression ratio M is greater than the second compression ratio threshold b is judged through step S44, the air conditioning system is run according to different compression ratio ranges to enter different lack of fluorine judgment modes, and the accuracy and precision of the air conditioning system in judging whether the fluorine is lacking are improved.

[0067] Specifically, step S43 comprises the following steps:

[0068] S431, obtaining the suction temperature T3;

[0069] S432, determining whether the suction temperature T3 is less than a first suction temperature threshold c; if yes, entering step S433; if no, entering step S434;

[0070] S433, the air conditioning system is normal and no fluorine deficiency phenomenon occurs;

[0071] S434, determining whether the suction temperature T3 is less than a second suction temperature threshold d; if yes, entering step S435;

[0072] S435, the air conditioning system has a fluorine deficiency amount of less than or equal to 30%, the system maintains the current mode operation, and a warning signal needs to be sent to the air conditioning control system; after the whole machine continuously operates for a second preset time t2, the air conditioning stops operating.

[0073] Steps S431 to S435 are associated with each other and cannot be separated. On the basis of the determination of the compression ratio in step S42, the detection and determination of the suction temperature T3 in steps S431 and S432 whether the suction temperature T3 is less than the first suction temperature threshold c can avoid misjudgment and can determine whether the air conditioning system has a fluorine deficiency. When the suction temperature T3 is less than the first suction temperature threshold c, it indicates that the air conditioning system is normal and no fluorine deficiency phenomenon occurs, and enters step S433. When the suction temperature T3 is greater than or equal to the first suction temperature threshold c, it indicates that the air conditioning system has a fluorine deficiency phenomenon, and enters step S434. In combination with step S434, whether the suction temperature T3 is less than the second suction temperature threshold d can accurately determine the range of the fluorine deficiency amount of the air conditioning system, and further improves the accuracy and precision of the determination of whether the air conditioning system has a fluorine deficiency. When the suction temperature T3 is less than the second suction temperature threshold d, it enters step S435, indicating that the air conditioning system has a fluorine deficiency amount of less than or equal to 30%, the system maintains the current mode operation, but the refrigeration effect will decrease, and a warning signal needs to be sent to the air conditioning control system, such as flashing of the control lamp corresponding to the mainboard, and after the whole machine continuously operates for a second preset time t2, the air conditioning stops operating, which can ensure the reliability of the whole machine. Because in the case of less refrigerant, the exhaust gas of the whole machine will be high, and the temperature of the compressor winding will be high, which affects the reliability of the whole machine.

[0074] Specifically, step S45 comprises the following steps:

[0075] S451, obtaining the suction temperature T3;

[0076] S452, determining whether the suction temperature T3 is greater than the second suction temperature threshold d; if yes, entering step S453;

[0077] S453, the air conditioning system is short of fluorine > 60%, the air conditioner stops running immediately and sends a signal of short of fluorine through the whole machine controller.

[0078] Steps S451-S453 are interrelated and inseparable. On the basis of the determination of the compression ratio in step S44, the detection of the suction temperature T3 in combination with step S451 and step S452 determines whether the suction temperature T3 > the second suction temperature threshold d, which can avoid misjudgment, accurately determine the range of the amount of fluorine shortage of the air conditioning system, and further improve the accuracy and precision of the determination of whether the air conditioning system is short of fluorine. When the suction temperature T3 > the second suction temperature threshold d, step S453 is entered, indicating that the air conditioning system is short of fluorine > 60%, the air conditioner stops running immediately and sends a signal of short of fluorine through the whole machine controller. On the one hand, it can ensure the reliability of the air conditioner, and on the other hand, the signal of short of fluorine can be displayed on the indoor display screen (such as P3 code), which is convenient for reminding the user and the after-sales maintenance personnel that the whole machine system is short of fluorine at this time, and the whole machine operation can be restored after recharging refrigerant or picking up the leak.

[0079] More specifically, step S1 includes the following steps:

[0080] S11, obtaining the indoor environment temperature T1 and the inner tube temperature T2;

[0081] S12, calculating the absolute value of the temperature difference between the indoor environment temperature and the inner tube temperature |T1-T2|, and determining whether |T1-T2|≤ the first temperature change threshold K1. If yes, step S13 is entered.

[0082] S13, starting.

[0083] Through the detection of the indoor environment temperature T1 and the inner tube temperature T2 in step S11, it is convenient to determine whether |T1-T2|≤ the first temperature change threshold K1 in step S12. When |T1-T2|≤ the first temperature change threshold K1, step S13 is entered to start, because the inner tube temperature and the indoor environment temperature may have a large difference under different working conditions. If there is no starting condition, the inner tube temperature may need a period of time to reduce or rise after starting, and this period of time is also included in the determination time range. Through steps S11-S13, the starting condition is set, and the air conditioning system can determine whether it is short of fluorine in time when |T1-T2|≤ the first temperature change threshold K1.

[0084] More specifically, in step S3, the air conditioner runs in a cooling mode, the indoor fan is in the highest wind gear, and the position of the air deflector is default. The air conditioner runs for a first preset time t1 under rated voltage.

[0085] Specifically, the value range of the first temperature change threshold K1 is not limited.

[0086] More specifically, the first temperature change threshold K1 is in the range of [0.8, 1], and the first temperature change threshold K1 can take any value in the range of [0.8, 1], and the unit of the first temperature change threshold K1 is ℃.

[0087] Preferably, in the embodiment, the first temperature change threshold K1 is 1 ℃.

[0088] Specifically, the first compression ratio threshold a is not limited in value.

[0089] More specifically, the first compression ratio threshold a is in the range of [1, 3], and the first compression ratio threshold a can take any value in the range of [1, 3].

[0090] The first compression ratio threshold a is set in the above range, which can not only accurately determine whether the air conditioning system is short of fluorine, but also accurately determine the range of the amount of fluorine shortage of the air conditioning system.

[0091] Preferably, in the embodiment, the first compression ratio threshold a is 2.

[0092] Specifically, the second compression ratio threshold b is not limited in value.

[0093] More specifically, the second compression ratio threshold b is in the range of [5, 9], and the second compression ratio threshold b can take any value in the range of [5, 9].

[0094] The second compression ratio threshold b is set in the above range, which can not only accurately determine whether the air conditioning system is short of fluorine, but also accurately determine the range of the amount of fluorine shortage of the air conditioning system.

[0095] Preferably, in the embodiment, the second compression ratio threshold b is 7.

[0096] Specifically, the first suction temperature threshold c is not limited in value.

[0097] More specifically, the first suction temperature threshold c is in the range of [18, 22], and the first suction temperature threshold c can take any value in the range of [18, 22], and the unit of the first suction temperature threshold c is ℃.

[0098] The first suction temperature threshold c is set in the above range, which can not only accurately determine whether the air conditioning system is short of fluorine, but also accurately determine the range of the amount of fluorine shortage of the air conditioning system.

[0099] Preferably, in the embodiment, the first suction temperature threshold c is 20 ℃.

[0100] Specifically, the second suction temperature threshold d is not limited in value.

[0101] More specifically, the second suction temperature threshold d is in the range of [28, 32], and the second suction temperature threshold d can take any value in the range of [28, 32], and the unit of the second suction temperature threshold d is ℃.

[0102] The second suction temperature threshold d is set in the above range, which can not only accurately determine whether the air conditioning system is lacking fluorine, but also accurately determine the range of the amount of fluorine lacking in the air conditioning system.

[0103] Preferably, in the embodiment, the value of the second suction temperature threshold d is 30℃.

[0104] Specifically, the value range of the first preset time t1 is not specifically limited.

[0105] More specifically, the first preset time t1 is in the range of [25, 35], and the first preset time t1 can take any value in the range of [25, 35], and the unit of the first preset time t1 is min.

[0106] Preferably, in the embodiment, the value of the first preset time t1 is 30min.

[0107] Specifically, the value range of the second preset time t2 is not specifically limited.

[0108] More specifically, the second preset time t2 is in the range of [1.5, 2.5], and the second preset time t2 can take any value in the range of [1.5, 2.5], and the unit of the second preset time t2 is h.

[0109] Preferably, in the embodiment, the value of the second preset time t2 is 2h.

[0110] The method for detecting the lack of fluorine in the air conditioning system provided by the embodiment, one, provides a method for detecting the lack of fluorine in the air conditioning system, two, through the detection method, the refrigerant condition of the whole machine system can be known in time, the purpose of timely and effectively finding out whether the air conditioner is lacking fluorine is achieved, the normal use of the user is ensured, and the abnormality is handled in time after the sale; three, the lack of fluorine in the air conditioning system is judged according to the combination of the compression ratio M and the suction temperature T3, which can not only determine whether the air conditioning system is lacking fluorine, but also accurately determine the range of the amount of fluorine lacking in the air conditioning system when the air conditioning system is lacking fluorine, thereby improving the accuracy and precision of the determination of whether the air conditioning system is lacking fluorine.

[0111] The method for detecting lack of fluorine in the air conditioning system in the embodiment, steps S1-S4 are interrelated and inseparable, the air conditioner is run in the refrigeration mode in step S3, the indoor fan is run at the highest wind grade for a first preset time t1 under the rated voltage; the refrigeration mode can avoid misjudgment, and it is more intuitive to judge whether the fluorine is lacking in the refrigeration mode; then, the lack of fluorine in the air conditioning system is judged in step S4 according to the compression ratio M and the suction temperature T3; the compression ratio M and the suction temperature T3 are combined to determine, which can avoid misjudgment and improve the accuracy and precision of the air conditioning system in determining whether the fluorine is lacking.

[0112] Embodiment 2

[0113] The embodiment provides an air conditioner, which comprises an outdoor unit and an indoor unit, an indoor fan and a guide vane are arranged on the indoor unit, the air conditioner comprises an air conditioner indoor unit and a method for detecting lack of fluorine in the air conditioning system according to any one of the embodiment 1.

[0114] For the air conditioner, in addition to comprising the indoor fan and the guide vane, other related components are also included, and the specific structure and assembly relationship of the related components are prior art, and thus are not described herein.

[0115] The air conditioner and the method for detecting lack of fluorine in the air conditioning system have the same advantages as the prior art, and thus are not described herein.

[0116] Although the present application is disclosed as above, the present application is not limited to this. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, and thus the protection scope of the present application should be subject to the scope defined by the claims.

Claims

1. A method of detecting a lack of fluorine in an air conditioning system, characterized by, The method for detecting the lack of fluorine in the air conditioning system comprises the following steps: S1, starting; S2, receiving a detection instruction for the lack of fluorine; S3, the air conditioner is operated in a refrigeration mode, and an indoor fan is operated at the highest wind speed for a first preset time t1 under a rated voltage; S4, judging the lack of fluorine in the air conditioning system according to a compression ratio M and a suction temperature T3; Step S4 comprises the following steps: S41, obtaining an evaporation pressure P1 and a condensation pressure P2; S42, calculating the compression ratio M, the compression ratio M = condensation pressure P2 / evaporation pressure P1, and judging whether the first compression ratio threshold a ≤ the compression ratio M ≤ the second compression ratio threshold b; if yes, step S43 is entered; if no, step S44 is entered; S43, performing a first lack of fluorine judgment mode in combination with the suction temperature T3; S44, judging whether the compression ratio M > the second compression ratio threshold b; if yes, step S45 is entered; S45, performing a second lack of fluorine judgment mode in combination with the suction temperature T3; Step S43 comprises the following steps: S431, obtaining the suction temperature T3; S432, judging whether the suction temperature T3 < the first suction temperature threshold c; if yes, step S433 is entered; if no, step S434 is entered; S433, the air conditioning system is normal and no lack of fluorine occurs; S434, judging whether the suction temperature T3 < the second suction temperature threshold d; if yes, step S435 is entered; S435, the amount of lack of fluorine in the air conditioning system ≤ 30%, the system is maintained in the current mode, and a warning signal needs to be sent to the air conditioning control system, and the air conditioner is stopped after running for a second preset time t2; Step S45 comprises the following steps: S451, obtaining the suction temperature T3; S452, judging whether the suction temperature T3 > the second suction temperature threshold d; if yes, step S453 is entered; 2. The method of claim 1, wherein the method comprises: S453, the amount of lack of fluorine in the air conditioning system > 60%, and the air conditioner is immediately stopped and sends a lack of fluorine signal through the whole machine controller. Step S1 comprises the following steps: S11, obtaining an indoor environment temperature T1 and an inner tube temperature T2; S12, calculating the absolute value of the temperature difference between the indoor environment temperature and the inner tube temperature |T1-T2|, and judging whether |T1-T2| ≤ the first temperature change threshold K1; if yes, step S13 is entered; 3. The method of claim 1, wherein the method comprises: S13, starting.

4. The method of claim 1, wherein the method further comprises: The first compression ratio threshold a has a value range of [1, 3].

5. The method of claim 1, wherein the method further comprises: The second compression ratio threshold b has a value range of [5, 9].

6. The method of claim 1, wherein the method further comprises: The first suction temperature threshold c has a value range of [18, 22], and the unit of the first suction temperature threshold c is ℃.

7. An air conditioner characterized by comprising: The second suction temperature threshold d has a value range of [28, 32], and the unit of the second suction temperature threshold d is ℃. The air conditioner comprises an outdoor unit and an indoor unit, an indoor fan is arranged on the indoor unit, and the air conditioner uses the method for detecting the lack of fluorine in the air conditioning system according to any one of claims 1-6.

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