CN108954670B - Fault pre-judging method and control system of air conditioner and air conditioner - Google Patents
Fault pre-judging method and control system of air conditioner and air conditioner Download PDFInfo
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- CN108954670B CN108954670B CN201811053209.9A CN201811053209A CN108954670B CN 108954670 B CN108954670 B CN 108954670B CN 201811053209 A CN201811053209 A CN 201811053209A CN 108954670 B CN108954670 B CN 108954670B
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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
- F24F11/62—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
Abstract
The invention provides a fault prejudging method of an air conditioner, a control system and the air conditioner, wherein the fault prejudging method of the air conditioner comprises the following steps: air conditioner refrigeration mode startup continuous operation time t1Then, the temperature T of the evaporator coil is obtainedTemperature of the tubeAnd indoor ambient temperature TInner ring(ii) a Temperature T of coil pipeTemperature of the tubeAnd a predetermined temperature T1Continuously comparing, and, according to the indoor ambient temperature TInner ringTemperature T of coil pipeTemperature of the tubeDifference value △ T and preset temperature T2Continuously comparing; when T isTemperature of the tube＞T1And △ T<T2And T isTemperature of the tube＞T1And △ T<T2Reaches the preset time t2If so, judging that the air conditioner has poor refrigeration effect and the unit of the air conditioner has a fault; otherwise, the air conditioner can perform cooling. The method for prejudging the fault of the air conditioner can acquire the operation parameters of the monitored air conditioner in real time, so that the parameters of the air conditioner can be prejudged in real time, and the fault condition of the air conditioner can be judged in time when the parameters are abnormal.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a fault pre-judging method and a control system of an air conditioner and the air conditioner.
Background
In the use of the existing air conditioner, the air conditioner usually adopts a general fault code to display and feed back a certain fault in the process of fault treatment, when the air conditioner is used for refrigerating, if the refrigerating effect is poor, various reasons may occur, such as possibly caused by refrigerant leakage, and if the fault codes with poor refrigerating effect are judged in the air conditioner treatment under the conditions, and the compressor of the air conditioner may be burnt out after the fault codes with poor refrigerating effect appear.
Disclosure of Invention
In view of this, the present invention is directed to a method for predicting a fault of an air conditioner, which can better determine a reason for a poor cooling effect of the air conditioner.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a fault pre-judging method of an air conditioner comprises the following steps:
air conditioner refrigeration mode startup continuous operation time t1Then, the temperature T of the evaporator coil is obtainedTemperature of the tubeAnd indoor ambient temperature TInner ring；
Subjecting the coil to a temperature TTemperature of the tubeAnd a predetermined temperature T1Continuously comparing, and, according to said indoor ambient temperature TInner ringWith said coil temperature TTemperature of the tubeDifference value △ T and preset temperature T2Continuously comparing;
when T isTemperature of the tube＞T1And △ T<T2And T isTemperature of the tube＞T1And △ T<T2Reaches the preset time t2If so, judging that the air conditioner has poor refrigeration effect and the unit of the air conditioner has a fault; otherwise, the air conditioner can perform cooling.
Further, when T isTemperature of the tube＞T1And △ T<T2And T isTemperature of the tube＞T1And △ T<T2Reaches the preset time t2The method also comprises the step of judging whether T is caused by the low running frequency of the air conditionerTemperature of the tube＞ T1And △ T<T2。
Further, the determination is made as to whether T is caused by an excessively low operating frequency of the air conditionerTemperature of the tube＞T1And △ T<T2The method comprises the following steps:
acquiring the operating frequency F of the air conditioner;
according to the operating frequency F and the self-checking frequency FSelf-testContinuously comparing;
when F is more than or equal to FSelf-testAnd F is not less than FSelf-testReaches the preset time t3If so, judging that the air conditioner has poor refrigeration effect and the unit of the air conditioner has a fault; otherwise, the air conditioner enters a self-checking mode.
Further, the self-checking mode includes:
raising the operating frequency F of the air conditioner to the self-checking frequency FSelf-test(ii) a And obtains the current evaporator coil temperature TTemperature of the tubeAnd indoor ambient temperature TInner ring；
The current coil temperature TTemperature of the tubeAnd a predetermined temperature T1Continuously comparing, and, according to said indoor ambient temperature TInner ringWith said coil temperature TTemperature of the tubeDifference value △ T and preset temperature T2Continuously comparing;
when T isTemperature of the tube＞T1And △ T<T2And T isTemperature of the tube＞T1And △ T<T2Reaches the preset time t4If so, judging that the air conditioner has poor refrigeration effect and the unit of the air conditioner has a fault; otherwise, the air conditioner can perform cooling.
Further, when the air conditioner is judged to have poor refrigeration effect and the unit of the air conditioner breaks down, sending air conditioner fault information to the server.
Further, the preset temperature T1The range of (A) is as follows: 13-15 ℃.
Further, the preset temperature T2The range of (A) is as follows: 8-10 ℃.
Compared with the prior art, the fault prejudging method of the air conditioner has the following advantages:
(1) the method for prejudging the fault of the air conditioner can acquire the operation parameters of the monitored air conditioner in real time, thereby prejudging the parameters of the air conditioner in real time, and can judge the fault condition of the air conditioner in time when the parameters are abnormal.
(2) When the air conditioner has poor refrigeration effect and a unit of the air conditioner breaks down, the fault information of the air conditioner is sent to the server, so that the air conditioner can be researched and developed and sold by personnel to acquire the fault information of the air conditioner from the server, the fault condition of the air conditioner can be judged in time, the possible problems can be solved in advance, and the problems of high maintenance difficulty, high cost and the like caused by follow-up are avoided.
Another objective of the present invention is to provide a fault pre-determination system for an air conditioner, so as to be able to better determine the reason for the poor cooling effect of the air conditioner.
A fault pre-determination system of an air conditioner, comprising:
an indoor environment temperature detection module for acquiring indoor environment temperature TInner ringAnd the obtained indoor ambient temperature T is measuredInner ringSending to a controller module;
an evaporator coil temperature detection module for acquiring the temperature T of the evaporator coilTemperature of the tubeAnd the acquired temperature T of the evaporator coilTemperature of the tubeSending to a controller module;
a time detection module for obtaining the starting up continuous operation time of the air conditioner in the refrigeration mode, and TTemperature of the tube> predetermined temperature T1And the indoor ambient temperature TInner ringWith said coil temperature TTemperature of the tubeDifference value △ T of<Preset temperature T2The time duration is sent to the controller module;
a controller module for judging whether the continuous operation time of the air conditioner in the refrigeration mode reaches the time t1When the operation time t is continued1In time, control the indoor ambient temperature detection module and the evaporator coil temperature detection module to acquire TTemperature of the tubeAnd TInner ring(ii) a And, subjecting said coil temperature TTemperature of the tubeAnd the preset temperature T1Continuously comparing, and, according to said indoor ambient temperature TInner ringWith said coil temperature TTemperature of the tubeDifference value △ T and preset temperature T2Continuously comparing; when judging TTemperature of the tube＞T1And △ T<T2And T isTemperature of the tube＞T1And △ T<T2Reaches the preset time t2In time, it is determined that the air conditioner has poor cooling effect and the unit of the air conditioner is in failureAnd (4) a barrier.
Further, the method also comprises the following steps: and the signal transmission module is in communication connection with the controller module and is used for sending air conditioner fault information to the server when the refrigerating effect of the air conditioner is poor and the unit of the air conditioner breaks down.
Compared with the prior art, the fault pre-judging system of the air conditioner and the fault pre-judging method of the air conditioner have the same advantages, and are not repeated herein.
Another objective of the present invention is to provide an air conditioner, which includes the above-mentioned fault pre-determination system, so as to be able to better determine the reason for the poor cooling effect of the air conditioner.
Compared with the prior art, the air conditioner fault pre-judging method and the air conditioner fault pre-judging system have the same advantages, and are not repeated herein.
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 predicting a fault of an air conditioner according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for predicting a fault 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.
Example one
As shown in fig. 1 and 2, the present invention provides a method for predicting a fault of an air conditioner, comprising the following steps:
s1 air conditioner cooling mode start-up continuous operation time t1Then, the temperature T of the evaporator coil is obtainedTemperature of the tubeAnd indoor ambient temperatureTInner ring；
S2 dividing the temperature T of the coilTemperature of the tubeAnd a predetermined temperature T1Continuously comparing, and, according to the indoor ambient temperature TInner ringTemperature T of coil pipeTemperature of the tubeDifference value △ T and preset temperature T2Continuously comparing;
s3 when TTemperature of the tube＞T1And △ T<T2And T isTemperature of the tube＞T1And △ T<T2Reaches the preset time t2And if the air conditioner is not in the normal working state, the air conditioner can perform refrigeration.
Wherein, time t1A predetermined temperature T1A predetermined temperature T2And a preset time t2All the options are specific according to actual conditions.
Time t in the present embodiment110min, preset temperature T1The range of (A) is as follows: 13 ℃ to 15 ℃, preferably 15 ℃, at a predetermined temperature T2The range of (A) is as follows: 8-10 ℃, preferably 8 ℃, and the preset time t2The temperature and the operating time obtained are determined for 3 min.
In the embodiment, after the air conditioner is started in the cooling mode and continuously runs for 10min, the temperature T of the evaporator coil of the air conditioner is measured after the air conditioner runs for 10minTemperature of the tubeIndoor ambient temperature T in a roomInner ringObtaining and calculating T in real timeInner ringAnd TTemperature of the tube△ T, the coil temperature TTemperature of the tubeContinuously comparing with a preset temperature of 15 ℃ and according to the indoor environment temperature TInner ringTemperature T of coil pipeTemperature of the tubeContinuously comparing the difference value △ T with the preset temperature of 8℃, if T is not equal to the preset temperatureTemperature of the tube> 15 ℃ and △ T<And if the temperature is 8 ℃ and the duration time of the comparison state reaches 3 minutes, judging that the refrigerating effect of the air conditioner is poor and the unit of the air conditioner breaks down.
When the air conditioner is in normal refrigeration operation, under normal working conditions, TTemperature of the tubeShould be at a preset temperature T1The refrigeration effect is normal only at the moment, and meanwhile, the refrigeration effect is in a high-humidity environmentLower, inner ring temperature T of general roomInner ringThe difference value of the temperature of the evaporator coil and the temperature T of the evaporator coil is at a preset temperature T2The above can explain that there is a cooling effect.
Wherein, when TTemperature of the tube＞T1And △ T<T2And T isTemperature of the tube＞T1And △ T<T2Reaches the preset time t2If so, judging that the air conditioner has poor refrigeration effect and the unit of the air conditioner has a fault; if not, the air conditioner can refrigerate, the refrigerating effect of the air conditioner can be determined to be still, the air conditioner does not need to be directly determined to be poor in refrigerating effect due to the fact that the air conditioner breaks down, the air conditioner can normally operate, and rechecking can be carried out when the air conditioner is restarted next time.
The method for pre-judging the fault of the air conditioner can acquire the operation parameters of the air conditioner in real time, so that the parameters of the air conditioner can be pre-judged in real time, and the fault condition of the air conditioner can be judged in time when the parameters are abnormal.
Example two
The present embodiment is different from the above-mentioned method for predicting the fault of the air conditioner in that when T is reachedTemperature of the tube＞T1And △ T<T2And T isTemperature of the tube＞T1And △ T<T2Reaches the preset time t2The method also comprises the step of judging whether T is caused by the low running frequency of the air conditionerTemperature of the tube＞T1And △ T<T2。
Wherein, it is judged whether T is caused by too low operation frequency of the air conditionerTemperature of the tube＞T1And △ T<T2The method comprises the following steps:
s301, acquiring the operating frequency F of the air conditioner;
s302 according to the operation frequency F and the self-checking frequency FSelf-testContinuously comparing;
s303 when F is more than or equal to FSelf-testAnd F is not less than FSelf-testReaches the preset time t3Judging that the air conditioner has poor refrigeration effect and a unit of the air conditioner has a fault; if not, the air conditioner entersAnd (4) self-checking mode.
Wherein the self-checking frequency FSelf-testAnd a preset time t3All the options are specific according to actual conditions.
Self-checking frequency F in the present embodimentSelf-testIs 60Hz, and the preset time t3The acquired operating frequency F and the operating time are determined in this way for 3 min.
When the operating frequency F of the air conditioner is too low during the operation of the air conditioner, the coil temperature T is causedTemperature of the tubeGreater, TInner ringAnd TTemperature of the tubeThe difference △ T is small, so that the poor cooling effect of the air conditioner and the abnormality of the air conditioner unit may be misjudged.
Therefore, in the embodiment, the operation frequency F of the air conditioner is obtained, and the operation frequency F is compared with the set self-checking frequency FSelf-testComparing, and continuously obtaining that F is more than or equal to FSelf-testIf the time exceeds 3 minutes, T is determinedTemperature of the tube＞T1And △ T<T2The judgment is normal, namely the refrigeration effect of the air conditioner is poor, and the unit of the air conditioner is abnormal.
EXAMPLE III
As mentioned above, the present embodiment is different from the above method for predicting the fault of the air conditioner in that the self-checking mode includes:
s331, raising the operating frequency F of the air conditioner to a self-checking frequency FSelf-test(ii) a And obtains the current evaporator coil temperature TTemperature of the tubeAnd indoor ambient temperature TInner ring；
S332 converting the current coil temperature TTemperature of the tubeAnd a predetermined temperature T1Continuously comparing, and, according to the indoor ambient temperature TInner ringTemperature T of coil pipeTemperature of the tubeDifference value △ T and preset temperature T2Continuously comparing;
s333 is equal to TTemperature of the tube＞T1And △ T<T2And T isTemperature of the tube＞T1And △ T<T2Reaches the preset time t4If so, judging that the air conditioner has poor refrigeration effect and the unit of the air conditioner has a fault; otherwise, the air conditioner canRefrigeration can be performed.
Wherein the preset time t4Is specifically selected according to actual conditions.
In the present embodiment, the time t is preset4The operating time is determined as 5 min.
When the air conditioner enters the self-checking mode, the running frequency F of the air conditioner is immediately increased to the self-checking frequency FSelf-testAt a self-checking frequency FSelf-testIs then continuously acquired as the evaporator coil temperature T during the up-conversion operationTemperature of the tubeAnd indoor ambient temperature TInner ringAnd the temperature T of the coil pipe in the frequency raising operation is measuredTemperature of the tubeAnd a predetermined temperature T1Continuously comparing, and, according to the indoor ambient temperature TInner ringTemperature T of coil pipeTemperature of the tubeDifference value △ T and preset temperature T2The comparison was continued. At this time, if for TTemperature of the tubeIs still greater than the preset temperature T1And a determination that the difference value △ T is less than the preset temperature T2And the duration of the judgment reaches t2If the time is 5 minutes, the refrigeration effect of the current air conditioner is poor and the unit of the air conditioner breaks down; if not, the refrigeration effect of the air conditioner is determined to be still, the air conditioner does not need to be directly determined to have a fault, so that the refrigeration effect is poor, the air conditioner can normally operate, and the air conditioner can be rechecked when the air conditioner is restarted next time.
Therefore, the operation data of the air conditioner in multiple aspects are acquired in real time and compared with the preset value, so that the operation condition of the air conditioner can be better predicted and judged, and the air conditioner can be better processed after the air conditioner breaks down.
Example four
The present embodiment is different from the above-mentioned method for predicting a failure of an air conditioner in that when it is determined that the cooling effect of the air conditioner is poor and a unit of the air conditioner fails, the method sends failure information of the air conditioner to a server.
In the use of the existing air conditioner, a user generally does not know the air conditioner, a general fault code can be automatically solved when a unit of the air conditioner breaks down, and some fault problems which are difficult to solve are repaired by calling after-sale when the fault code appears, at the moment, the air conditioner is possibly seriously damaged, the air conditioner is difficult to repair and high in cost, and the burden of consumers and air conditioner manufacturers is increased.
Therefore, in the embodiment, when it is determined that the air conditioner has a poor refrigeration effect and a unit of the air conditioner has a fault, the fault information of the air conditioner is sent to the server, so that the fault information of the air conditioner can be acquired from the server by the air conditioner research and development personnel and the after-sales personnel, the fault condition of the air conditioner can be timely determined, the possible problems can be solved in advance, and the problems of high maintenance difficulty, high cost and the like caused by follow-up are avoided.
EXAMPLE five
As shown in fig. 2, the present embodiment of the method for predicting a fault of an air conditioner as described above is different from the method including:
starting to detect the temperature T of the evaporator coil after the air conditioner starts to run for 10min in a refrigeration modeTemperature of the tubeAnd indoor ambient temperature TInner ring；
Then, according to the detected temperature T of the evaporator coilTemperature of the tubeAnd indoor ambient temperature TInner ring△ T, and calculating coil temperature TTemperature of the tubeAnd a predetermined temperature T1Continuously comparing at 15 ℃, and, △ T with a preset temperature T2Continuously comparing at 8 ℃;
wherein, whether T is judgedTemperature of the tube>15 ℃ and △ T < 8 ℃, and the duration of the comparison or state is T2If yes, then determining whether T is caused by too low operation frequency of the air conditionerTemperature of the tube＞T1And △ T<T2If not, judging that the air conditioner can normally run, and if the refrigerating effect of the air conditioner is still enough, rechecking the air conditioner when the air conditioner is restarted next time;
wherein, it is judged whether T is caused by too low operation frequency of the air conditionerTemperature of the tube＞T1And △ T<T2The method comprises the following steps: judging whether the running frequency F is more than or equal to the self-checking frequency FSelf-testWhen F is not less than FSelf-testAnd F is not less than FSelf-testReaches the preset time t3When the time is 3min, the air conditioner refrigerating effect is poor and the unit of the air conditioner breaks down, and the air conditioner fault information can be sent to the server; if not, the air conditioner enters a self-checking mode;
the self-checking mode of the air conditioner comprises the following steps: raising the running frequency F of the air conditioner to the self-checking frequency FSelf-testTo make the air conditioner self-check frequency FSelf-testThe frequency of (2) is operated;
at a self-test frequency FSelf-testDuring the operation of the frequency of (2), the temperature T of the evaporator coil in the current operation state is measuredTemperature of the tubeAnd a predetermined temperature T1Comparison is made at 15 ℃ and the evaporator coil temperature T is present in the operating stateTemperature of the tubeAnd indoor ambient temperature TInner ringDifference value △ T and preset temperature T2Comparison is carried out at 8 ℃;
if so, TTemperature of the tube>15 ℃ and △ T < 8 ℃, and the duration of the comparison or state is T4If the time is 5min or more than 5min, the refrigerating effect of the air conditioner is poor and the unit of the air conditioner breaks down, and at the moment, the fault information of the air conditioner can be sent to a server; if not, the air conditioner can be judged to normally operate, the refrigeration effect of the air conditioner is still enough, and the air conditioner can be rechecked when being restarted next time.
According to the fault pre-judging method of the air conditioner, when the parameter of the air conditioner is detected to be abnormal, the fault condition of the air conditioner can be judged in time, and when the refrigerating effect of the air conditioner is judged to be poor and a unit of the air conditioner breaks down, the fault information of the air conditioner is sent to the server, so that the air conditioner can be researched and sold, personnel can obtain the fault information of the air conditioner from the server, the fault condition of the air conditioner can be judged in time, possible problems can be solved in advance, the problems of high maintenance difficulty, high cost and the like caused by follow-up work can be avoided, meanwhile, the fault condition judgment of the air conditioner is not compared by single data, and the fault reason of the air conditioner can be judged more accurately by simultaneously comparing data in multiple aspects, and the condition of misjudgment can not occur.
EXAMPLE six
According to the method for prejudging the fault of the air conditioner, the invention provides a system for prejudging the fault of the air conditioner, which comprises the following steps:
an indoor environment temperature detection module for acquiring indoor environment temperature TInner ringAnd obtaining the indoor ambient temperature TInner ringSending to a controller module;
an evaporator coil temperature detection module for acquiring the temperature T of the evaporator coilTemperature of the tubeAnd obtaining the temperature T of the evaporator coilTemperature of the tubeSending to a controller module;
a time detection module for obtaining the starting continuous operation time of the air conditioner in the refrigeration mode, and TTemperature of the tube> predetermined temperature T1And indoor ambient temperature TInner ringTemperature T of coil pipeTemperature of the tubeDifference value △ T of<Preset temperature T2The time duration is sent to the controller module;
a controller module for judging whether the continuous operation time of the air conditioner in the refrigeration mode reaches the time t1When the operation time t is continued1In time, the indoor environment temperature detection module and the evaporator coil temperature detection module are controlled to acquire TTemperature of the tubeAnd TInner ring(ii) a And, maintaining the coil temperature TTemperature of the tubeAnd a predetermined temperature T1Continuously comparing, and, according to the indoor ambient temperature TInner ringTemperature T of coil pipeTemperature of the tubeDifference value △ T and preset temperature T2Continuously comparing; when judging TTemperature of the tube＞T1And △ T<T2And T isTemperature of the tube＞T1And △ T<T2Reaches the preset time t2And judging that the air conditioner has poor refrigeration effect and the unit of the air conditioner breaks down.
Through the fault pre-judging system of the air conditioner, the operation parameters of the air conditioner can be obtained and monitored in real time, so that the parameters of the air conditioner can be pre-judged in real time, and when the parameters are abnormal, the fault condition of the air conditioner can be judged in time.
The air conditioner fault information sending system comprises a signal transmission module, a controller module and a server, wherein the signal transmission module is in communication connection with the controller module and used for sending the air conditioner fault information to the server when the refrigerating effect of the air conditioner is poor and a unit of the air conditioner breaks down, and the air conditioner fault information can be obtained from the server by air conditioner research and development and after-sales personnel, so that the fault condition of the air conditioner can be judged in time, the possible problems can be solved in advance, and the problems of high maintenance difficulty, high cost and the like caused by follow-up are avoided.
EXAMPLE seven
According to the fault pre-judging system of the air conditioner, the invention provides the air conditioner, the running parameters of the air conditioner can be obtained and monitored in real time, so that the parameters of the air conditioner are pre-judged in real time, the fault condition of the air conditioner can be judged in time when the parameters are abnormal, the fault information of the air conditioner is sent to the server when the refrigerating effect of the air conditioner is judged to be poor and a unit of the air conditioner is in fault, the fault information of the air conditioner can be obtained from the server by the air conditioner research and development personnel after sale, the fault condition of the air conditioner can be judged in time, the possible problems can be solved in advance, and the problems of high maintenance difficulty, high cost and the like caused by follow-up are avoided.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A fault pre-judging method of an air conditioner is characterized by comprising the following steps:
air conditioner refrigeration mode startup continuous operation time t1Then, the temperature T of the evaporator coil is obtainedTemperature of the tubeAnd indoor ambient temperature TInner ring；
Subjecting the coil to a temperature TTemperature of the tubeAnd a predetermined temperature T1Continuously comparing, and, according to said indoor ambient temperature TInner ringWith said coil temperature TTemperature of the tubeDifference △ T and the preset temperatureT2Continuously comparing;
when T isTemperature of the tube＞T1And △ T<T2And T isTemperature of the tube＞T1And △ T<T2Reaches the preset time t2If so, judging that the air conditioner has poor refrigeration effect and the unit of the air conditioner has a fault; if not, the air conditioner can refrigerate;
when T isTemperature of the tube＞T1And △ T<T2And T isTemperature of the tube＞T1And △ T<T2Reaches the preset time t2The method also comprises the step of judging whether T is caused by the low running frequency of the air conditionerTemperature of the tube＞T1And △ T<T2(ii) a The judging whether T is caused by too low operation frequency of the air conditionerTemperature of the tube＞T1And △ T<T2The method comprises the following steps:
acquiring the operating frequency F of the air conditioner;
according to the operating frequency F and the self-checking frequency FSelf-testContinuously comparing;
when F is more than or equal to FSelf-testAnd F is not less than FSelf-testReaches the preset time t3If so, judging that the air conditioner has poor refrigeration effect and the unit of the air conditioner has a fault; if not, the air conditioner enters a self-checking mode; the self-checking mode comprises:
raising the operating frequency F of the air conditioner to the self-checking frequency FSelf-test(ii) a And obtains the current evaporator coil temperature TTemperature of the tubeAnd indoor ambient temperature TInner ring；
The current coil temperature TTemperature of the tubeAnd a predetermined temperature T1Continuously comparing, and, according to said indoor ambient temperature TInner ringWith said coil temperature TTemperature of the tubeDifference value △ T and preset temperature T2Continuously comparing;
when T isTemperature of the tube＞T1And △ T<T2And T isTemperature of the tube＞T1And △ T<T2Reaches the preset time t4Then judging the cooling effect of the air conditionerPoor and the unit of the air conditioner is out of order; otherwise, the air conditioner is judged to be capable of cooling.
2. The method as claimed in claim 1, wherein when it is determined that the air conditioner has a poor cooling effect and a unit of the air conditioner is out of order, air conditioner failure information is transmitted to the server.
3. The method of claim 1, wherein the preset temperature T is set to be higher than the preset temperature T1The range of (A) is as follows: 13-15 ℃.
4. The method of claim 1, wherein the preset temperature T is set to be higher than the preset temperature T2The range of (A) is as follows: 8-10 ℃.
5. A failure prediction system for an air conditioner, comprising:
an indoor environment temperature detection module for acquiring indoor environment temperature TInner ringAnd the obtained indoor ambient temperature T is measuredInner ringSending to a controller module;
an evaporator coil temperature detection module for acquiring the temperature T of the evaporator coilTemperature of the tubeAnd the acquired temperature T of the evaporator coilTemperature of the tubeSending to a controller module;
a time detection module for obtaining the starting up continuous operation time of the air conditioner in the refrigeration mode, and TTemperature of the tube> predetermined temperature T1And the indoor ambient temperature TInner ringWith said coil temperature TTemperature of the tubeDifference value △ T of<Preset temperature T2The time duration is sent to the controller module;
a controller module for judging whether the continuous operation time of the air conditioner in the refrigeration mode reaches the time t1When the operation time t is continued1In time, control the indoor ambient temperature detection module and the evaporator coil temperature detection module to acquire TTemperature of the tubeAnd TInner ring(ii) a And, subjecting said coil temperature TTemperature of the tubeAnd the preset temperature T1Continuously comparing, and, according to said indoor ambient temperature TInner ringWith said coil temperature TTemperature of the tubeDifference value △ T and preset temperature T2Continuously comparing; when judging TTemperature of the tube＞T1And △ T<T2And T isTemperature of the tube＞T1And △ T<T2Reaches the preset time t2If so, judging that the air conditioner has poor refrigeration effect and the unit of the air conditioner has a fault; the fault pre-judging system of the air conditioner controls the operation of the air conditioner according to the method of any one of claims 1 to 4.
6. The fault pre-determination system of an air conditioner according to claim 5, further comprising: and the signal transmission module is in communication connection with the controller module and is used for sending air conditioner fault information to the server when the refrigerating effect of the air conditioner is poor and the unit of the air conditioner breaks down.
7. An air conditioner characterized by comprising the failure prediction system of the air conditioner according to any one of claims 5 or 6.
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| CN110107985B (en) * | 2019-05-06 | 2021-07-13 | 广东美的暖通设备有限公司 | Fault detection method, computer readable storage medium, indoor unit and air conditioner |
| CN110243052A (en) * | 2019-06-21 | 2019-09-17 | 宁波奥克斯电气股份有限公司 | Air conditioner self checking method, device and air conditioner |
| CN110296500B (en) * | 2019-07-10 | 2020-10-02 | 珠海格力电器股份有限公司 | Unit maintenance requirement determining method and device based on user tolerance condition and air conditioner |
| CN110470038A (en) * | 2019-08-21 | 2019-11-19 | 南京天加环境科技有限公司 | A kind of judgement and guard method that unit air-conditioner booting is abnormal |
| CN111981633A (en) * | 2020-08-31 | 2020-11-24 | 宁波奥克斯电气股份有限公司 | Air conditioner exception handling method, device and system and server |
| CN113587402A (en) * | 2021-06-30 | 2021-11-02 | 珠海拓芯科技有限公司 | Air conditioner control method and air conditioner |
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