CN110887167A - Air conditioner refrigerant leakage detection method and air conditioner - Google Patents
Air conditioner refrigerant leakage detection method and air conditioner Download PDFInfo
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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
- F24F11/36—Responding to malfunctions or emergencies to leakage of heat-exchange fluid
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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
- F24F11/62—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
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Abstract
The invention provides a method for detecting refrigerant leakage of an air conditioner and the air conditioner. The detection method for the refrigerant leakage of the air conditioner comprises the following steps of: s1, performing periodic fault pre-judgment on the operation condition of a refrigerant of the air conditioner, and executing step S2 when the judgment result shows that the operation parameter of the air conditioner is abnormal; s2, detecting the refrigerant leakage condition of the air conditioner, and executing the step S3 when the judgment result shows that the refrigerant leaks; and S3, judging the refrigerant leakage risk level of the air conditioner. By the method and the device, the refrigerant leakage risk can be found in time, and the refrigerant leakage risk grade can be judged.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a method for detecting refrigerant leakage of an air conditioner and the air conditioner.
Background
With the improvement of living standard of people, the popularization rate of the air conditioner is higher and higher, and the maintenance of the air conditioner is correspondingly frequent in the face of the large-area popularization of the air conditioner. In which, after the air conditioner is used for a long time, the refrigerant leakage problem may occur. The refrigerant leakage of the air conditioner causes problems in that firstly, the temperature adjusting capability of the air conditioner is deteriorated, and a user finds a problem and seeks maintenance after the air conditioner is operated for a long time in a state where the refrigerant is broken down. At this time, since the refrigerant leakage failure is likely to have caused serious risks and problems such as damage to the compressor, damage to the piping, etc., the maintenance cost of the air conditioner may be increased and the lifespan of the air conditioner may be shortened. Therefore, it is important to provide a detection means for accurately detecting a refrigerant leakage failure.
Disclosure of Invention
In view of the above, the present invention is directed to a method for detecting refrigerant leakage of an air conditioner and an air conditioner thereof, so as to solve the technical problems in the prior art.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a detection method for air conditioner refrigerant leakage comprises the following steps:
s1, performing periodic fault pre-judgment on the operation condition of a refrigerant of the air conditioner, and executing step S2 when the judgment result shows that the operation parameter of the air conditioner is abnormal;
s2, detecting the refrigerant leakage condition of the air conditioner, and executing the step S3 when the judgment result shows that the refrigerant leaks;
and S3, judging the refrigerant leakage risk level of the air conditioner.
Further, in step S1, periodically performing a fault pre-determination on the refrigerant operating condition according to a first temperature parameter T1, a second temperature parameter T2, a third temperature parameter T3, a first pressure parameter P1, a second pressure parameter P2, and a third pressure parameter P3 of the air conditioner; the first temperature parameter T1, the second temperature parameter T2, and the third temperature parameter T3 are respectively a temperature at an outlet of a heat exchanger of an indoor unit of the air conditioner, a temperature at an outlet of the indoor unit of the air conditioner, and a temperature at a middle of the heat exchanger of the indoor unit of the air conditioner after the air conditioner is in a stable operation state; the first pressure parameter P1 is the refrigerant pressure at the outlet of the compressor of the air conditioner when the air conditioner is in a high-low pressure balance state; the second pressure parameter P2 and the third pressure parameter P3 are respectively a refrigerant pressure at an outlet of a compressor of the air conditioner and a refrigerant pressure at an outlet of a heat exchanger of an indoor unit of the air conditioner after the air conditioner is in a stable operation state.
Further, in step S2, detecting the refrigerant leakage condition according to a fourth temperature parameter T4, a fifth temperature parameter T5 of the air conditioner and a compressor operating frequency H; the fourth temperature parameter T4 is an outer loop temperature when the air conditioner is turned on; the fifth temperature parameter T5 is a temperature at the surface of a heat exchange coil of an outdoor unit heat exchanger of the air conditioner after the air conditioner is in a stable operation state; and the compressor running frequency H is the compressor running frequency of the air conditioner in a stable running state.
Further, in step S3, a refrigerant residue coefficient e is calculated according to a sixth temperature parameter T6, a seventh temperature parameter T7, an eighth temperature parameter T8, and a ninth temperature parameter T9 of the air conditioner, and the refrigerant leakage risk level is determined according to the refrigerant residue coefficient e; the sixth temperature parameter T6 and the seventh temperature parameter T7 are the temperature at the outlet and the temperature at the inlet of the heat exchanger of the outdoor unit of the air conditioner respectively when the air conditioner operates for a third preset time T3; the eighth temperature parameter T8 and the ninth temperature parameter T9 are the temperature at the inlet and the temperature at the outlet of the heat exchanger of the indoor unit of the air conditioner respectively when the air conditioner runs for a third preset time T3.
Further, step S1 includes the following steps:
s1-1, before the air conditioner is started to operate, acquiring the first pressure parameter P1;
s1-2, starting the air conditioner to operate in a refrigeration mode, and acquiring the second pressure parameter P2, the third pressure parameter P3, the first temperature parameter T1, the second temperature parameter T2 and the third temperature parameter T3 after the operating state of the air conditioner is stable;
s1-3, judging whether the first pressure parameter P1 is smaller than the first pressure parameterNumber threshold P1Threshold(s)(ii) a If yes, go to step S1-4;
s1-4, judging whether the second pressure parameter P2 is larger than a second pressure parameter threshold P2Threshold(s)(ii) a If yes, go to step S1-5;
s1-5, judging whether the first temperature parameter T1 is larger than a first temperature parameter threshold value T1Threshold(s)(ii) a If yes, go to step S1-6;
s1-6, the difference value of the second temperature parameter T2 and the third temperature parameter T3 is a first temperature difference delta T2-3Judging the first temperature difference delta T2-3Whether or not it is less than the first temperature difference threshold value Delta T2-3 threshold(ii) a If yes, go to step S1-7;
s1-7, judging whether the third pressure parameter P3 is smaller than a third pressure threshold P3Threshold(s)(ii) a And if so, outputting the judgment result that the operating parameters of the air conditioner are abnormal.
Further, step S2 includes the following steps:
s2-1, starting the air conditioner to obtain the fourth temperature parameter T4;
s2-2, adjusting the set temperature of the air conditioner to a heating standard set temperature, and acquiring a fifth temperature parameter T5 and the compressor operation frequency H when the air conditioner operates for a second preset time T2;
s2-3, judging whether the temperature change rate v1 of the external coil is smaller than the temperature change rate threshold v1 of the external coilThreshold(s)(ii) a If yes, go to step S2-4;
s2-4, judging whether the frequency change rate v2 of the compressor is larger than the frequency change rate threshold v2 of the compressorThreshold(s)(ii) a And if so, outputting the judgment result that the refrigerant leaks.
Further, step S3 includes the following steps:
s3-1, starting the air conditioner, adjusting the set temperature of the air conditioner to the set temperature of the refrigeration standard, and obtaining a sixth temperature parameter T6, a seventh temperature parameter T7, an eighth temperature parameter T8 and a ninth temperature parameter T9 when the operation of the air conditioner reaches the third preset time T3;
s3-2, calculating the refrigerant allowance coefficient epsilon according to the sixth temperature parameter T6, the seventh temperature parameter T7, the eighth temperature parameter T8 and the ninth temperature parameter T9;
and S3-3, judging the refrigerant leakage risk level according to the refrigerant allowance coefficient epsilon.
Furthermore, the value range of the refrigerant allowance coefficient epsilon is 0.0-1.0.
Further, in step S3-3, when the refrigerant residue coefficient ∈ exceeds 0.6, it is determined that the refrigerant leakage risk level is level a; when the refrigerant allowance coefficient epsilon is 0.4-0.6, judging that the refrigerant leakage risk grade is B grade; when the refrigerant allowance coefficient epsilon is 0.2-0.4, judging that the refrigerant leakage risk grade is C grade; and when the refrigerant allowance coefficient epsilon is 0-0.2, judging that the refrigerant leakage risk level is risk-free.
The air conditioner adopts the detection method for detecting the refrigerant leakage of the air conditioner.
By the method and the device, the refrigerant leakage risk can be found in time, and the refrigerant leakage risk grade can be judged. Specifically, compared with the prior art, the method for detecting the refrigerant fault of the air conditioner has the following advantages:
firstly, the invention provides a method for periodically carrying out fault pre-judgment on the operation condition of a refrigerant by periodically testing the temperature parameter and the pressure parameter in the operation process of the air conditioner. The invention realizes accurate judgment means by utilizing repeated checking and checking of easily measured temperature and pressure parameters, and avoids the increase of maintenance cost caused by judgment errors.
Secondly, the invention provides a refrigerant leakage judging method when the operation parameters of the air conditioner are abnormal, which can accurately judge whether the operation abnormality of the air conditioner is caused by the refrigerant leakage. Particularly, the invention comprehensively judges the temperature change rate of the external coil of the air conditioner and the speed of the compressor, reduces the judgment error caused by the difference between the ambient temperature and the set temperature by establishing the external coil temperature change rate threshold database and the compressor frequency change rate threshold database, and improves the accuracy of judgment.
Finally, the invention judges the refrigerant leakage risk grade by detecting the operation parameters of the air conditioner and combining the operation conditions of the indoor unit and the outdoor unit to carry out comprehensive calculation, so that the air conditioner can execute different processing modes according to different refrigerant risk grades, thereby effectively protecting the air conditioner.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a first flowchart of a method for detecting refrigerant leakage of an air conditioner according to an embodiment of the present invention;
fig. 2 is a second flowchart of a method for detecting refrigerant leakage of an air conditioner according to an embodiment of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1, an embodiment of the present invention provides a method for processing a refrigerant leakage fault of an air conditioner, which specifically includes the following steps:
s1, performing periodic fault pre-judgment on the operation condition of the refrigerant, keeping the normal operation of the air conditioner when the judgment result of the step S1 is abnormal, and executing a step S2 when the judgment result of the step S1 is abnormal.
And S2, detecting the refrigerant leakage condition, keeping the normal operation of the air conditioner when the judgment result of the step S2 shows that no leakage exists, and executing a step S3 when the judgment result of the step S2 shows that leakage exists.
And S3, judging the refrigerant leakage risk level. The refrigerant leakage risk grade is judged by detecting the related operating parameters of the air conditioner, and a basis is provided for maintenance personnel during fault repair and refrigerant refilling.
The reason why the refrigerant leakage failure processing is performed in steps S1 to S3 is that: through the step S1, the fault pre-judgment of periodic detection can be carried out through the detection of the operation parameters of the refrigerant, the abnormity in the refrigerant circulation can be found in time, and the serious damage of the air conditioner, such as capacitor damage, compressor fault and the like caused by long-term operation under the working conditions of serious shortage and leakage of the refrigerant can be avoided. In step S2, a further accurate determination is made based on the abnormality found, and it is determined whether or not refrigerant leakage has occurred. Through step S3, the refrigerant allowance is calculated, so that the refrigerant leakage risk level is determined, and different alarm prompts or protective measures are performed for different risk levels.
The detailed sub-steps and principles of each step S1-S4 will be described in detail below with reference to fig. 2.
The failure pre-determination described in step S1 is performed by the following method:
and carrying out periodic fault pre-judgment on the operation condition of the refrigerant according to a first temperature parameter T1, a second temperature parameter T2, a third temperature parameter T3, a first pressure parameter P1, a second pressure parameter P2 and a third pressure parameter P3 of the air conditioner.
The first temperature parameter T1, the second temperature parameter T2, and the third temperature parameter T3 are respectively a temperature at an outlet of a heat exchanger of an indoor unit of the air conditioner, a temperature at an outlet of the indoor unit of the air conditioner, and a temperature at a middle of the heat exchanger of the indoor unit of the air conditioner after the air conditioner is in a stable operation state. The temperature of the middle part of the heat exchanger of the indoor unit of the air conditioner refers to the temperature of the heat exchange coil at the middle position of the heat exchanger of the indoor unit. The first pressure parameter P1 is the refrigerant pressure at the outlet of the compressor of the air conditioner when the air conditioner is in a high-low pressure balance state; the second pressure parameter P2 and the third pressure parameter P3 are respectively a refrigerant pressure at an outlet of a compressor of the air conditioner and a refrigerant pressure at an outlet of a heat exchanger of an indoor unit of the air conditioner after the air conditioner is in a stable operation state.
Specifically, step S1 includes the following steps:
s1-1, before the air conditioner is started to operate, acquiring the first pressure parameter P1.
S1-2, starting the air conditioner to operate in a refrigeration mode, and acquiring the second pressure parameter P2, the third pressure parameter P3, the first temperature parameter T1, the second temperature parameter T2 and the third temperature parameter T3 after the operating state of the air conditioner is stable.
S1-3, judging whether the first pressure parameter P1 is smaller than a first pressure parameter threshold P1Threshold(s)If the judgment result is negative, the judgment is finished; when the judgment result is yes, step S1-4 is performed.
S1-4, judging whether the second pressure parameter P2 is larger than a second pressure parameter threshold P2Threshold(s)(ii) a If the judgment result is negative, finishing the judgment; when the judgment result is yes, step S1-5 is performed.
S1-5, judging whether the first temperature parameter T1 is larger than a first temperature parameter threshold value T1Threshold(s)(ii) a If the judgment result is negative, finishing the judgment; when the judgment result is yes, step S1-6 is performed.
S1-6, the difference value of the second temperature parameter T2 and the third temperature parameter T3 is a first temperature difference delta T2-3Judging the first temperature difference delta T2-3Whether or not it is less than the first temperature difference threshold value Delta T2-3 threshold(ii) a If the judgment result is negative, finishing the judgment; when the judgment result is yes, step S1-7 is performed.
S1-7, judging whether the third pressure parameter P3 is smaller than a third pressure threshold P3Threshold(s)(ii) a If the judgment result is negative, finishing the judgment; and if so, outputting the judgment result that the operating parameters of the air conditioner are abnormal.
If the test results of step S1-3 and step S1-4 indicate that the first pressure parameter P1 is less than the first pressure parameter threshold P1Threshold(s)And the second pressure parameter P2 is greater than the second pressure parameter threshold P2Threshold(s)It indicates that the refrigerant charge may be decreasing. But do notSince different operating environments, different operating parameters and different operating modes may cause differences in refrigerant distribution conditions in the refrigerant circulation pipeline each time the air conditioner is shut down, after the preliminary comparison is performed according to the pressure parameters through steps S1-3 and S1-4, further comparison and judgment are performed according to the temperature parameters through step S1-5, so as to determine whether an abnormality actually exists. The reason for performing the comparison and determination in step S1-6 is that when the refrigerant of the air conditioner is deficient or insufficient due to a leakage fault, problems such as pressure drop and exhaust rise in the refrigerant pipeline may occur, before the air conditioner is started, the temperature of the inner coil is substantially the same as the temperature of the inner ring, and after the air conditioner is started to operate the refrigeration function, the temperature of the inner coil may be rapidly decreased and is lower than the temperature of the inner ring. If there is a refrigerant fault, the difference Δ T between the second temperature parameter T2 and the third temperature parameter T32-3It will be lowered. Therefore, when the first temperature difference Δ T2-3Is less than or equal to the first temperature difference threshold delta T2-3 thresholdIf so, the operation of the air conditioner is abnormal. And finally, performing final verification by adopting the pressure parameters again through the step S1-7 to ensure the accuracy of the judgment result.
Wherein the first temperature difference threshold Δ T2-3 thresholdIs 1-4 ℃. The first pressure parameter threshold value P1Threshold(s)The second pressure parameter threshold value P2Threshold(s)And said third pressure threshold P3Threshold(s)The air conditioner is a fixed value preset before the air conditioner leaves the factory, and the numerical value can be designed and adjusted by a person skilled in the art. Such as the first pressure parameter threshold P1Threshold(s)Is set as the first standard refrigerant pressure P1 at the outlet of the compressor of the air conditioner in the high-low pressure balance state under the conditions of sufficient refrigerant, no leakage and no failureSign board80% or 90%. Setting the second pressure parameter threshold P2Threshold(s)Is set to be the second standard refrigerant pressure P2 at the outlet of the compressor of the air conditioner when the running state of the air conditioner is stable under the conditions of sufficient refrigerant, no leakage and no faultSign board110% or 120%. Setting the third pressure parameter threshold P3Threshold(s)Numerical value ofSetting the third standard refrigerant pressure P3 at the outlet of the heat exchanger of the indoor unit of the air conditioner when the running state of the air conditioner is stable under the conditions of sufficient refrigerant, no leakage and no faultSign board70% or 80%. The first temperature parameter threshold T1Threshold(s)The air conditioner is a fixed value preset before the air conditioner leaves the factory, and the numerical value can be designed and adjusted by a person skilled in the art. For example, the first temperature parameter threshold value T1Threshold(s)Is set to be the standard refrigerant temperature T1 at the outlet of the heat exchanger of the indoor unit of the air conditioner when the running state of the air conditioner is stable under the conditions of sufficient refrigerant, no leakage and no faultSign board110% or 120%. The first standard refrigerant pressure P1Sign boardA second standard refrigerant pressure P2Sign boardA third standard refrigerant pressure P3Sign boardAnd standard refrigerant temperature T1Sign boardAll can be obtained by testing.
The step S1 is intended to be performed periodically to check for risk, and the step S1 may be performed periodically every one to six months, as selected by those skilled in the art. If refrigerant faults cannot be found in time, huge potential safety hazards and high maintenance cost are caused, but the time and economic cost of users are also consumed for arranging contact of maintenance personnel to carry out on-site maintenance. Therefore, step S1 of the embodiment of the present invention is not only to perform periodic failure pre-determination on the refrigerant operation status, but also to provide a means for performing accurate determination by performing a check with easily measurable temperature and pressure parameters, thereby avoiding an increase in maintenance cost due to a determination error.
If the determination result of step S1 is that an abnormality has occurred, the refrigerant leakage is detected in step S2. Thereby accurately determining whether the abnormality of step S1 is caused by refrigerant leakage.
Step S2 is performed by the following method: and detecting the refrigerant leakage condition according to the fourth temperature parameter T4, the fifth temperature parameter T5 and the compressor operating frequency H of the air conditioner.
The fourth temperature parameter T4 is an outer ring temperature when the air conditioner is turned on, and the fifth temperature parameter T5 is a temperature at a surface of a heat exchange coil of an outdoor unit heat exchanger of the air conditioner after the air conditioner is in a stable operation state. And the compressor running frequency H is the compressor running frequency of the air conditioner in a stable running state.
Specifically, step S2 includes the following substeps:
s2-1, starting the air conditioner, and obtaining the fourth temperature parameter T4.
S2-2, adjusting the set temperature of the air conditioner to a heating standard set temperature, and acquiring the fifth temperature parameter T5 and the compressor operation frequency H when the air conditioner operates for a second preset time T2.
S2-3, judging whether the temperature change rate v1 of the external coil is smaller than the temperature change rate threshold v1 of the external coilThreshold(s)If the judgment result is negative, the judgment is finished; when the judgment result is yes, step S2-4 is performed.
S2-4, judging whether the frequency change rate v2 of the compressor is larger than the frequency change rate threshold v2 of the compressorThreshold(s)If the judgment result is negative, the judgment is finished; and if so, outputting the judgment result that the refrigerant leaks.
Wherein the rate of change of the temperature v1 of the outer coil is calculated by the following formula:
t4 and T5 are the fourth temperature parameter T4 and the fifth temperature parameter T5 respectively, T2 is the second preset time, and the value range of the second preset time is 2-8 minutes.
Wherein the compressor frequency change rate v2 is calculated by the following formula:
h is the compressor operating frequency.
The threshold value v1 of the temperature change rate of the outer coilThreshold(s)The temperature change rate of the heat exchanger of the outdoor unit of the air conditioner from starting to running for 3 minutes under the conditions of no leakage, no shortage and no fault of the refrigerant is as follows: opening deviceWhen the running time of the outdoor unit reaches 3 minutes, the difference value of the temperature change of the heat exchanger of the outdoor unit is divided by the running time for 3 minutes. The compressor frequency rate of change threshold v2Threshold(s)Under the condition that the refrigerant is not leaked, insufficient or failed, when the starting operation time reaches 3 minutes, the operation frequency change difference value of the compressor of the air conditioner is divided by the operation time for 3 minutes. The threshold value v1 of the temperature change rate of the outer coilThreshold(s)And a compressor frequency rate of change threshold v2Threshold(s)Is a fixed value that is obtained through testing before the air conditioner is shipped from a factory and is stored in advance in a calculation unit of the air conditioner.
It should be noted that, under different conditions of the outer ring temperature, the inner ring temperature and the set temperature, the operating state and various parameters in the operating process of the air conditioner are different. Therefore, under different inner ring, outer ring and set temperature conditions, the corresponding outer coil temperature change rate threshold v1Threshold(s)And a compressor frequency rate of change threshold v2Threshold(s)There is a difference. In order to achieve accurate, fast and convenient comparison, in the embodiment of the present invention, before the air conditioner leaves a factory, the external coil temperature change rate threshold database shown in table 1 and the compressor frequency change rate threshold database shown in table 2 are first established.
The external coil temperature change rate threshold database comprises the temperature change rate of the outdoor unit heat exchanger of the air conditioner when the air conditioner is started to run for 3 minutes under the conditions that the set temperature of the air conditioner is fixed and unchanged (namely the air conditioner runs under the heating standard set temperature condition) and the different external ring temperature and internal ring temperature conditions under the conditions that the refrigerant is not leaked, not insufficient and not failed, namely: the difference in the temperature change of the outdoor heat exchanger was divided by the running time for 3 minutes.
The compressor frequency change rate threshold database comprises a compressor operation frequency change difference value of the corresponding air conditioner when the air conditioner is started to operate for 3 minutes divided by an operation time for 3 minutes under different conditions of outer ring temperature and inner ring temperature under the condition that the set temperature of the air conditioner is fixed and unchanged (namely the air conditioner operates under the heating standard set temperature condition) under the condition that a refrigerant is not leaked, insufficient and faultless.
TABLE 1
TABLE 2
For example, in step S1, the test obtains that the second temperature parameter T2 is equal to TInner x. In step S2-1, the fourth temperature parameter T4 is tested to be equal to TOuter a. In step S2-2, the set temperature of the air conditioner is adjusted to the heating standard set temperature of 30 ℃, and the fifth temperature parameter T5 and the compressor operation frequency H are acquired when the air conditioner is operated for a second predetermined time T2 (T2 is set to 5 minutes in the present embodiment). Inquiring the external coil temperature change rate threshold database and the compressor frequency change rate threshold database according to the second temperature parameter T2 and the fourth temperature parameter T4 to obtain a corresponding external coil temperature change rate threshold v1Threshold(s)Is v1Threshold axCorresponding compressor frequency rate of change threshold v2Threshold(s)Is v2Threshold ax. Subsequently, in steps S2-3 and S2-4, the determination of whether the rate of change of the temperature of the outer coil v1 is less than the threshold rate of change of the temperature of the outer coil v1 may be madeThreshold axAnd whether the compressor frequency rate of change v2 is greater than the compressor frequency rate of change threshold v2Threshold axAnd judging whether the refrigerant leaks.
It should be noted that, before the air conditioner is shipped from the factory, the threshold v1 of the temperature change rate of the external coil with a fixed value is obtained by testing under a certain specific environmental parameter conditionThreshold(s)And a compressor frequency rate of change threshold v2Threshold(s)The purpose of determining whether the refrigerant leaks in step S2 according to the embodiment of the present invention can be achieved by storing the information in the computing unit of the air conditioner in advance. However, by establishing the external coil temperature rate of change threshold database and the compressor frequency rate of change thresholdA value database, and searching corresponding external coil temperature change rate threshold value v1 in the external coil temperature change rate threshold value database and the compressor frequency change rate threshold value database according to the second temperature parameter T2 and the fourth temperature parameter T4Threshold(s)And a compressor frequency rate of change threshold v2Threshold(s)The influence of environmental factors on the determination result can be reduced or eliminated, and the determination accuracy of step S2 can be further improved.
And S3, judging the refrigerant leakage risk level. The method comprises the steps of detecting relevant operation parameters of the air conditioner, and accurately calculating the refrigerant allowance according to the operation parameters, so that the refrigerant leakage risk level is judged, and a basis is provided for maintenance personnel during fault repair and refrigerant refilling.
The judgment of the refrigerant leakage risk level in the step S3 is performed by the following method:
and calculating a refrigerant allowance coefficient epsilon according to a sixth temperature parameter T6, a seventh temperature parameter T7, an eighth temperature parameter T8 and a ninth temperature parameter T9 of the air conditioner, and judging the refrigerant leakage risk level according to the refrigerant allowance coefficient epsilon.
The sixth temperature parameter T6 and the seventh temperature parameter T7 are the temperature at the outlet and the temperature at the inlet of the heat exchanger of the outdoor unit of the air conditioner, respectively, when the air conditioner is operated for a third predetermined time T3. The eighth temperature parameter T8 and the ninth temperature parameter T9 are the temperature at the inlet and the temperature at the outlet of the heat exchanger of the indoor unit of the air conditioner respectively when the air conditioner runs for a third preset time T3. The third preset time t3 ranges from 6 minutes to 8 minutes, and preferably ranges from 6 minutes.
Specifically, step S3 includes the following substeps:
s3-1, starting the air conditioner, adjusting the set temperature of the air conditioner to the set temperature of the refrigeration standard, and obtaining a sixth temperature parameter T6, a seventh temperature parameter T7, an eighth temperature parameter T8 and a ninth temperature parameter T9 when the operation of the air conditioner reaches the third preset time T3.
And S3-2, calculating the refrigerant allowance coefficient epsilon according to the sixth temperature parameter T6, the seventh temperature parameter T7, the eighth temperature parameter T8 and the ninth temperature parameter T9.
And S3-3, judging the refrigerant leakage risk level according to the refrigerant allowance coefficient epsilon.
In step S3-2, the refrigerant residual coefficient ∈ is calculated by the following equation:
in step S3-3, when the refrigerant margin coefficient ∈ exceeds 0.6, it is determined that the refrigerant leakage risk level is level a; when the refrigerant allowance coefficient epsilon is 0.4-0.6, judging that the refrigerant leakage risk grade is B grade; when the refrigerant allowance coefficient epsilon is 0.2-0.4, judging that the refrigerant leakage risk grade is C grade; and when the refrigerant allowance coefficient epsilon is 0-0.2, judging that the refrigerant leakage risk level is risk-free. When the refrigerant leakage risk level is no risk level or level C according to the judgment result of the step S3, the air conditioner keeps normal operation; when the refrigerant leakage risk level is class a or class B as a result of the determination in step S3, it indicates that a refrigerant leakage fault needs to be handled by a maintenance worker, and a new refrigerant is filled.
It should be noted that the temperature parameter according to the embodiment of the present invention is obtained by a temperature sensor test. The temperature sensor can be realized by adopting a temperature sensor which is commonly used in the technical field of air conditioners in the prior art and can sense temperature and convert temperature information into a usable output signal, and the embodiment of the invention is not limited. The refrigerant pressure parameter is obtained by testing a pressure sensor, and the pressure sensor is a pressure sensor which is commonly used in the technical field of air conditioners in the prior art and can sense pressure and convert pressure information into a usable output signal. The calculation process of the embodiment of the invention can be performed by software and a corresponding general hardware platform, such as a computer software product with calculation and comparison functions stored in a storage medium such as a ROM/RAM, a magnetic disk, an optical disk, and the like. Finally, it should also be noted that, in the embodiments of the present invention, relational terms such as first, second, third, fourth, and the like are used solely to separate one entity or operation or parameter value from another entity or operation region or parameter value without necessarily requiring or implying any actual relationship or order between such entities or operations or parameter values.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A detection method for air conditioner refrigerant leakage is characterized by comprising the following steps:
s1, performing periodic fault pre-judgment on the operation condition of a refrigerant of the air conditioner, and executing step S2 when the judgment result shows that the operation parameter of the air conditioner is abnormal;
s2, detecting the refrigerant leakage condition of the air conditioner, and executing the step S3 when the judgment result shows that the refrigerant leaks;
and S3, judging the refrigerant leakage risk level of the air conditioner.
2. The method for detecting refrigerant leakage of an air conditioner as claimed in claim 1, wherein: in step S1, periodically performing failure pre-determination on the refrigerant operating condition according to a first temperature parameter T1, a second temperature parameter T2, a third temperature parameter T3, a first pressure parameter P1, a second pressure parameter P2, and a third pressure parameter P3 of the air conditioner; the first temperature parameter T1, the second temperature parameter T2, and the third temperature parameter T3 are respectively a temperature at an outlet of a heat exchanger of an indoor unit of the air conditioner, a temperature at an outlet of the indoor unit of the air conditioner, and a temperature at a middle of the heat exchanger of the indoor unit of the air conditioner after the air conditioner is in a stable operation state; the first pressure parameter P1 is the refrigerant pressure at the outlet of the compressor of the air conditioner when the air conditioner is in a high-low pressure balance state; the second pressure parameter P2 and the third pressure parameter P3 are respectively a refrigerant pressure at an outlet of a compressor of the air conditioner and a refrigerant pressure at an outlet of a heat exchanger of an indoor unit of the air conditioner after the air conditioner is in a stable operation state.
3. The method for detecting refrigerant leakage of an air conditioner as claimed in claim 2, wherein: in step S2, detecting the refrigerant leakage condition according to a fourth temperature parameter T4, a fifth temperature parameter T5 and a compressor operating frequency H of the air conditioner; the fourth temperature parameter T4 is an outer loop temperature when the air conditioner is turned on; the fifth temperature parameter T5 is a temperature at the surface of a heat exchange coil of an outdoor unit heat exchanger of the air conditioner after the air conditioner is in a stable operation state; and the compressor running frequency H is the compressor running frequency of the air conditioner in a stable running state.
4. The method for detecting refrigerant leakage of an air conditioner as claimed in claim 3, wherein: in step S3, calculating a refrigerant residue coefficient e according to a sixth temperature parameter T6, a seventh temperature parameter T7, an eighth temperature parameter T8, and a ninth temperature parameter T9 of the air conditioner, and determining the refrigerant leakage risk level according to the refrigerant residue coefficient e; the sixth temperature parameter T6 and the seventh temperature parameter T7 are the temperature at the outlet and the temperature at the inlet of the heat exchanger of the outdoor unit of the air conditioner respectively when the air conditioner operates for a third preset time T3; the eighth temperature parameter T8 and the ninth temperature parameter T9 are the temperature at the inlet and the temperature at the outlet of the heat exchanger of the indoor unit of the air conditioner respectively when the air conditioner runs for a third preset time T3.
5. The method as claimed in claim 4, wherein the step S1 includes the steps of:
s1-1, before the air conditioner is started to operate, acquiring the first pressure parameter P1;
s1-2, starting the air conditioner to operate in a refrigeration mode, and acquiring the second pressure parameter P2, the third pressure parameter P3, the first temperature parameter T1, the second temperature parameter T2 and the third temperature parameter T3 after the operating state of the air conditioner is stable;
s1-3, judging whether the first pressure parameter P1 is smaller than a first pressure parameter threshold P1Threshold(s)(ii) a If yes, go to step S1-4;
s1-4, judging whether the second pressure parameter P2 is larger than a second pressure parameter threshold P2Threshold(s)(ii) a If yes, go to step S1-5;
s1-5, judging whether the first temperature parameter T1 is larger than a first temperature parameter threshold value T1Threshold(s)(ii) a If yes, go to step S1-6;
s1-6, the difference value of the second temperature parameter T2 and the third temperature parameter T3 is a first temperature difference delta T2-3Judging the first temperature difference delta T2-3Whether or not it is less than the first temperature difference threshold value Delta T2-3 threshold(ii) a If yes, go to step S1-7;
s1-7, judging whether the third pressure parameter P3 is smaller than a third pressure threshold P3Threshold(s)(ii) a And if so, outputting the judgment result that the operating parameters of the air conditioner are abnormal.
6. The method as claimed in claim 4, wherein the step S2 includes the steps of:
s2-1, starting the air conditioner to obtain the fourth temperature parameter T4;
s2-2, adjusting the set temperature of the air conditioner to a heating standard set temperature, and acquiring a fifth temperature parameter T5 and the compressor operation frequency H when the air conditioner operates for a second preset time T2;
s2-3, judging whether the temperature change rate v1 of the external coil is smaller than the temperature change rate threshold v1 of the external coilThreshold(s)(ii) a If yes, go to step S2-4;
s2-4, judging whether the frequency change rate v2 of the compressor is larger than the frequency change rate threshold v2 of the compressorThreshold(s)(ii) a And if so, outputting the judgment result that the refrigerant leaks.
7. The method as claimed in claim 4, wherein the step S3 includes the steps of:
s3-1, starting the air conditioner, adjusting the set temperature of the air conditioner to the set temperature of the refrigeration standard, and obtaining a sixth temperature parameter T6, a seventh temperature parameter T7, an eighth temperature parameter T8 and a ninth temperature parameter T9 when the operation of the air conditioner reaches the third preset time T3;
s3-2, calculating the refrigerant allowance coefficient epsilon according to the sixth temperature parameter T6, the seventh temperature parameter T7, the eighth temperature parameter T8 and the ninth temperature parameter T9;
and S3-3, judging the refrigerant leakage risk level according to the refrigerant allowance coefficient epsilon.
8. The method of claim 7, wherein the refrigerant residue coefficient ε is in a range of 0.0-1.0.
9. The method for detecting refrigerant leakage of an air conditioner as claimed in claim 8, wherein in step S3-3, when the refrigerant margin coefficient e exceeds 0.6, the refrigerant leakage risk level is determined to be class a; when the refrigerant allowance coefficient epsilon is 0.4-0.6, judging that the refrigerant leakage risk grade is B grade; when the refrigerant allowance coefficient epsilon is 0.2-0.4, judging that the refrigerant leakage risk grade is C grade; and when the refrigerant allowance coefficient epsilon is 0-0.2, judging that the refrigerant leakage risk level is risk-free.
10. An air conditioner, characterized in that the air conditioner adopts the method for detecting the refrigerant leakage of the air conditioner as claimed in any one of claims 1 to 9.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112378134A (en) * | 2020-11-20 | 2021-02-19 | 珠海格力电器股份有限公司 | Refrigerator and refrigerant leakage detection method thereof |
| CN113669840A (en) * | 2021-08-31 | 2021-11-19 | 佛山市顺德区美的电子科技有限公司 | Air conditioner, refrigerant leakage detection method thereof and computer readable storage medium |
| CN113847702A (en) * | 2021-08-30 | 2021-12-28 | 青岛海尔空调电子有限公司 | Air conditioner refrigerant leakage monitoring method and air conditioner |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1566826A (en) * | 2003-06-17 | 2005-01-19 | 乐金电子(天津)电器有限公司 | Air-conditioner with one outdoor set and multiple indoor sets and its control method |
| CN101865509A (en) * | 2006-04-27 | 2010-10-20 | 大金工业株式会社 | Refrigerant amount determination operation of air conditioner |
| WO2010148989A1 (en) * | 2009-06-26 | 2010-12-29 | 珠海格力电器股份有限公司 | Air conditionaer and method for controlling the same |
| WO2013038704A1 (en) * | 2011-09-16 | 2013-03-21 | パナソニック株式会社 | Air conditioner |
| CN104676855A (en) * | 2015-02-28 | 2015-06-03 | 广东美的制冷设备有限公司 | Variable-frequency air conditioner and coolant leakage detection method thereof |
| CN106482301A (en) * | 2016-11-02 | 2017-03-08 | 广东美的暖通设备有限公司 | A kind of detection method of air-conditioning system cold-producing medium fault and device |
| CN107289599A (en) * | 2017-08-10 | 2017-10-24 | 四川长虹电器股份有限公司 | A kind of apparatus and method for detecting air conditioner coolant amount of leakage |
| CN107436016A (en) * | 2017-07-27 | 2017-12-05 | 广东美的制冷设备有限公司 | Detection method, the system of air conditioner and wherein coolant leakage |
| CN108027188A (en) * | 2015-09-10 | 2018-05-11 | 日立江森自控空调有限公司 | Freezing cycle device |
-
2018
- 2018-09-10 CN CN201811054002.3A patent/CN110887167A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1566826A (en) * | 2003-06-17 | 2005-01-19 | 乐金电子(天津)电器有限公司 | Air-conditioner with one outdoor set and multiple indoor sets and its control method |
| CN101865509A (en) * | 2006-04-27 | 2010-10-20 | 大金工业株式会社 | Refrigerant amount determination operation of air conditioner |
| WO2010148989A1 (en) * | 2009-06-26 | 2010-12-29 | 珠海格力电器股份有限公司 | Air conditionaer and method for controlling the same |
| WO2013038704A1 (en) * | 2011-09-16 | 2013-03-21 | パナソニック株式会社 | Air conditioner |
| CN104676855A (en) * | 2015-02-28 | 2015-06-03 | 广东美的制冷设备有限公司 | Variable-frequency air conditioner and coolant leakage detection method thereof |
| CN108027188A (en) * | 2015-09-10 | 2018-05-11 | 日立江森自控空调有限公司 | Freezing cycle device |
| CN106482301A (en) * | 2016-11-02 | 2017-03-08 | 广东美的暖通设备有限公司 | A kind of detection method of air-conditioning system cold-producing medium fault and device |
| CN107436016A (en) * | 2017-07-27 | 2017-12-05 | 广东美的制冷设备有限公司 | Detection method, the system of air conditioner and wherein coolant leakage |
| CN107289599A (en) * | 2017-08-10 | 2017-10-24 | 四川长虹电器股份有限公司 | A kind of apparatus and method for detecting air conditioner coolant amount of leakage |
Non-Patent Citations (2)
| Title |
|---|
| 石文星: "《小型空调热泵装置设置》", 31 October 2013 * |
| 秦存涛: "关于提高家用空调APF能效的试验研究", 《2014年中国家用电器技术大会 论文集》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112378134A (en) * | 2020-11-20 | 2021-02-19 | 珠海格力电器股份有限公司 | Refrigerator and refrigerant leakage detection method thereof |
| CN113847702A (en) * | 2021-08-30 | 2021-12-28 | 青岛海尔空调电子有限公司 | Air conditioner refrigerant leakage monitoring method and air conditioner |
| CN113847702B (en) * | 2021-08-30 | 2022-12-27 | 青岛海尔空调电子有限公司 | Air conditioner refrigerant leakage monitoring method and air conditioner |
| CN113669840A (en) * | 2021-08-31 | 2021-11-19 | 佛山市顺德区美的电子科技有限公司 | Air conditioner, refrigerant leakage detection method thereof and computer readable storage medium |
| CN113669840B (en) * | 2021-08-31 | 2022-09-27 | 佛山市顺德区美的电子科技有限公司 | Air conditioner, refrigerant leakage detection method thereof and computer readable storage medium |
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