CN110186155B - Method for detecting filth blockage of air conditioner external unit and self-cleaning air conditioner external unit and air conditioner - Google Patents
Method for detecting filth blockage of air conditioner external unit and self-cleaning air conditioner external unit and air conditioner Download PDFInfo
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- CN110186155B CN110186155B CN201910508435.XA CN201910508435A CN110186155B CN 110186155 B CN110186155 B CN 110186155B CN 201910508435 A CN201910508435 A CN 201910508435A CN 110186155 B CN110186155 B CN 110186155B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—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
- F24F11/65—Electronic processing for selecting an operating mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
Abstract
The invention provides a filth blockage detecting and self-cleaning method for an air conditioner external unit, which comprises the following steps: judging the dirty and blocked condition of the condenser of the outer machine by obtaining the temperature Tc of an outer disc, the temperature T0 of an outer ring, the exhaust temperature Tp and the rotating speed S of the outer fan during the refrigeration operation of the air conditioner; if the condenser of the external unit is judged to be dirty and blocked and needs to be automatically cleaned, the condenser is automatically cleaned by changing a refrigeration and heating mode and adjusting the steering of the external fan. Therefore, the dirty blockage of the outdoor unit can be detected through the temperature sensor of the air conditioning unit, self-cleaning is carried out, energy can be saved, user experience can be improved, and the reliability and the service life of the air conditioning unit are improved.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to a filth blockage detection and self-cleaning method for an air conditioner external unit and an air conditioner.
Background
The outdoor unit of the air conditioner is installed and used in a severe environment, and is easy to be dirty and blocked due to the fact that dust, leaves and other foreign matters accidentally enter the condenser fins or plastic bags and other foreign matters are adsorbed on the condenser. The heat dissipation of the outdoor unit is affected by filth blockage of the outdoor unit, so that the refrigeration effect of the air conditioner is reduced, the energy efficiency is reduced, and the energy is wasted. If the outdoor unit is seriously clogged, the outdoor environment temperature is high, the exhaust is overhigh, and the reliability and the service life of the unit are influenced. The outdoor unit of the household air conditioner is generally arranged on an equipment platform or hung on an outer wall, so that a user cannot notice the condition that the outdoor unit is dirty and blocked.
Disclosure of Invention
The invention aims to provide a dirty blockage detection and self-cleaning method for an air conditioner external unit, which can improve the reliability and prolong the service life of the unit.
In order to solve the above problems, the present invention provides a method for detecting filth blockage and self-cleaning of an air conditioner external unit, comprising:
judging the dirty and blocked condition of the condenser of the outer machine by obtaining the temperature Tc of an outer disc, the temperature T0 of an outer ring, the exhaust temperature Tp and the rotating speed S of the outer fan during the refrigeration operation of the air conditioner;
if the condenser of the external unit is judged to be dirty and blocked, the condenser is self-cleaned by changing the refrigeration and heating mode and adjusting the steering of the external fan.
From this, can detect the dirty stifled of off-premises station through air conditioning unit's own temperature sensor to self-cleaning, it is intelligent high-efficient, can the energy saving and promote user experience, increase air conditioning unit reliability and life.
In some embodiments, the determining that the outdoor unit condenser is dirty and blocked by obtaining the outer disc temperature Tc, the outer ring temperature T0, the exhaust temperature Tp and the outer fan rotation speed S when the air conditioner is in cooling operation includes:
calculating a first temperature difference Δ T1 between the exhaust temperature Tp and the outer disc temperature Tc and a second temperature difference Δ T2 between the outer disc temperature Tc and the outer ring temperature T0;
and if delta T1 is less than or equal to a and delta T2 is more than or equal to b, judging that the outer machine condenser is dirty and blocked, wherein a and b are set according to the rotating speed S of the outer fan, the rated high wind rotating speed S0 of the outer fan, the indoor and outdoor ambient temperature and test data.
Since the first temperature difference Δ T1 is Tp-Tc and the second temperature difference Δ T2 is Tc-T0, the heat exchange effect of the condenser can be reflected, and therefore, the heat exchange effect of the condenser is determined by comparing the first temperature difference with the threshold a and the second temperature difference with the threshold b, and further, the outdoor unit filth blockage can be determined.
In some embodiments, the determining that the outdoor unit condenser is dirty and blocked by obtaining the outer disc temperature Tc, the outer ring temperature T0, the exhaust temperature Tp and the outer fan rotation speed S when the air conditioner is in cooling operation includes:
s1, in the refrigeration mode, after the air conditioning unit is started, real-time detection of the outer disc temperature Tc, the outer ring temperature T0, the compressor exhaust temperature Tp and the outer fan rotating speed S is started;
s2, calculating the first temperature difference Δ T1-Tp-Tc and the second temperature difference Δ T2-Tc-T0 every time period T0:
s3, if the conditions that delta T1 is not more than a and delta T2 is not less than b are continuously met for n times, judging that the external machine is dirty and blocked; otherwise, go back to step S2; and n is more than or equal to 2, and a and b are set according to the rotating speed S of the outer fan, the rated high wind rotating speed S0 of the outer fan, the indoor and outdoor ambient temperature and test data.
Under the refrigeration mode, the temperature is detected in real time through the self-contained sensor of the air conditioning unit, whether dirty blockage exists or not is judged according to the continuous judgment result of multiple time intervals, misjudgment and subsequent misoperations can be effectively prevented, and the reliability of judgment is improved.
In some embodiments, the a, b are calculated according to the following formula:
a＝Ta*S/S0*e；
b＝Tb*S0/S*e；
wherein e is a revision coefficient influenced by indoor and outdoor ambient temperatures, S is an actual outer fan rotating speed, S0 is a rated high wind rotating speed of the outer fan, and Ta is a first set temperature difference; tb sets for the difference in temperature for the second, first set for the difference in temperature, second set for the difference in temperature by the temperature data setting of test under the predetermined condition.
Under the refrigeration mode, influenced by the indoor and outdoor ambient temperatures, the S/S0 is the ratio of the actual running rotating speed of the outdoor unit to the rated high wind rotating speed (the rotating speed is in direct proportion to the wind volume) and is in direct proportion to the heat exchange effect of the condenser. When the S/S0 is larger, the heat exchange effect of the condenser is better, and at the moment, the delta T1 is larger than Tp-Tc, and the delta T2 is smaller than Tc-T0; when the S/S0 is smaller, the heat exchange effect of the condenser is poorer, and at the moment, the Delta T1 is smaller than Tp-Tc, and the Delta T2 is larger than Tc-T0. Therefore, specific Ta and Tb are set according to test data of practical experiments and are obtained by combining the heat transfer theory.
In some embodiments, the tests include a rated refrigeration test, a maximum operation refrigeration test, and a condenser intake air anomaly test.
In some embodiments, 17 ≦ Ta ≦ 24, 10 ≦ Tb ≦ 15. E is more than or equal to 0.8 and less than or equal to 1.2, wherein e is 1 under rated refrigeration working conditions (inner ring temperature 27 and outer ring temperature 35), when the inner side working condition is higher, namely the inner ring temperature is higher, the value of e is larger, and when the outer side working condition is higher, namely the outer ring temperature is higher, the value of e is smaller.
In some embodiments, if it is determined that the condenser of the external unit is dirty and blocked, the self-cleaning of the condenser by changing the cooling and heating mode and adjusting the steering of the external fan comprises:
the air conditioning unit enters a heating mode, the outer fan stops running, the air conditioning unit is switched to a cooling mode after the outer plate temperature Tc is less than a first preset temperature Tc1 and lasts for a first preset time t1, and when the outer plate temperature Tc is greater than a second preset temperature Tc2, the outer fan rotates reversely for a second preset time t2, self-cleaning is completed, and the air conditioning unit returns to normal running.
The self-cleaning process simulates the frosting and defrosting process of the air conditioner external unit, namely after the air conditioner unit enters a heating mode, the temperature of the external tray starts to be reduced, when the temperature of the external tray is reduced to a preset temperature and is kept, the external unit frosts, then the air conditioner is switched to a refrigerating mode, the temperature of the external tray is increased, the frosting of the external unit is melted, foreign matters of the external unit heat exchanger are taken away, and the external unit is reversely rotated through the external fan, so that effective self-cleaning is realized.
In some embodiments, -10. ltoreq. Tc 1. ltoreq.5 ℃ C, 2. ltoreq. Tc 2. ltoreq.6 ℃. In order to simulate the frosting and defrosting process of the air conditioner external unit, the real-time first preset temperature Tc1Is a temperature less than 0 deg.C, a second preset temperature Tc2At a temperature greater than 0 ℃.
In some embodiments, 1 ≦ t1 ≦ 5min, 1 ≦ t2 ≦ 10 min. The temperature Tc of the outer disc is less than the first preset temperature Tc1After the first preset time t1, the temperature of the air conditioner outer disc is low enough to frost, the t1 value is set according to an empirical value, and the second preset time t2 ensures that the self-cleaning can be completed in the reverse rotation time of the outer fan.
In some embodiments, if it is determined that the outdoor unit condenser is dirty, the air conditioner automatically enters the outdoor unit self-cleaning mode, or selects whether to enter the outdoor unit self-cleaning mode through user operation.
According to another aspect of the present invention, there is provided an air conditioner including:
a readable storage medium to store executable instructions;
and the one or more processors execute the method for detecting filth blockage and self-cleaning of the outdoor unit of the air conditioner according to the executable instructions.
In some embodiments, the air conditioner further comprises: outer dish temperature sensor, outdoor temperature sensor, exhaust temperature sensor and outer fan speed sensor, treater electrical connection to outer dish temperature sensor, outdoor temperature sensor, exhaust temperature sensor and outer fan speed sensor. Dirty stifled of off-premises station is detected through air conditioning unit's own temperature sensor to carry out the automatically cleaning, can promote user experience, convenient high-efficient under the prerequisite that does not increase the hardware cost.
Drawings
Fig. 1 is a flow chart of a filth blockage detection and self-cleaning method for an air conditioner external unit.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
The invention relates to a filth blockage detection and self-cleaning method for an air conditioner outdoor unit, which judges the filth blockage condition of a condenser by combining an outer coil temperature Tc detected by an outer coil sensor of an outdoor heat exchanger, an outer ring temperature T0 detected by an outdoor temperature sensor and an exhaust temperature Tp detected by an exhaust hole of a compressor with the wind gear rotating speed S of an outer fan, and frosts the condenser by adjusting the wind speed and the steering direction of the outer fan so as to achieve the self-cleaning purpose. According to the invention, the dirty and blockage of the outdoor unit is detected through the temperature sensor of the unit, and self-cleaning is carried out, so that the intelligent and efficient outdoor unit is realized, the energy can be saved, the user experience can be improved, the reliability of the unit is improved, and the service life of the unit is prolonged.
Specifically, the method for detecting and self-cleaning filth blockage of the air conditioner outdoor unit comprises the steps of judging the filth blockage condition of the condenser of the outdoor unit by acquiring the temperature Tc of an outer disc, the temperature T0 of an outer ring, the exhaust temperature Tp and the rotating speed S of the external fan during the refrigeration operation of the air conditioner; if the condenser of the external unit is judged to be dirty and blocked, the condenser is self-cleaned by changing the refrigeration and heating mode and adjusting the steering of the external fan.
In a first exemplary embodiment of the present invention, a method for detecting filth blockage and self-cleaning of an outdoor unit of an air conditioner is provided. Fig. 1 is a flow chart of a filth blockage detection and self-cleaning method for an air conditioner external unit. As shown in fig. 1, in S1, after the air conditioning unit is started in the cooling mode, real-time detection of the outer disc temperature Tc, the outer ring temperature T0, the compressor discharge temperature Tp, and the outer fan rotation speed S is started;
s2, calculating a first temperature difference Δ T1-Tp-Tc and a second temperature difference Δ T2-Tc-T0 every time period T0;
s3, if delta T1 is not more than a and delta T2 is not less than b for n times, reporting an outdoor unit filth blockage code, continuously flashing an outdoor unit filth blockage fault lamp to prompt a user that the outdoor unit is filth blocked, and turning to the step S4; otherwise, go back to step S2; if the external machine filth blockage detection is needed to be sensitive, setting n to be 1; generally, n is equal to or greater than 2 to avoid misjudgment.
Since the first temperature difference Δ T1 is Tp-Tc and the second temperature difference Δ T2 is Tc-T0, the heat exchange effect of the condenser is determined by comparing the first temperature difference with the threshold a and the second temperature difference with the threshold b, and the outdoor unit is further determined to be dirty and blocked. The selection of the threshold values a and b is generally a threshold value obtained according to a rated refrigeration test, a maximum operation refrigeration test, condenser intake anomaly and other tests, and specifically, the threshold values a and b are calculated according to the following formula:
a＝Ta*S/S0*e；
b＝Tb*SO/S*e；
wherein e is a revision coefficient influenced by the indoor and outdoor ambient temperatures, and Ta is a first set temperature difference; tb is the second set temperature difference, S is the actual speed of the outer fan obtained in step S1, and S0 is the rated high wind speed of the outer fan.
Under the refrigeration mode, influenced by the indoor and outdoor ambient temperatures, the S/S0 is the ratio of the actual running rotating speed of the outdoor unit to the rated high wind rotating speed (the rotating speed is in direct proportion to the wind volume) and is in direct proportion to the heat exchange effect of the condenser. When the S/S0 is larger, the heat exchange effect of the condenser is better, and at the moment, the delta T1 is larger than Tp-Tc, and the delta T2 is smaller than Tc-T0; when the S/S0 is smaller, the heat exchange effect of the condenser is poorer, and at the moment, the Delta T1 is smaller than Tp-Tc, and the Delta T2 is larger than Tc-T0.
Therefore, specific Ta and Tb are set according to test data of an actual test, and temperature data of tests such as a rated refrigeration test, a maximum operation refrigeration test, condenser intake abnormity and the like are obtained together by combining a heat transfer theory. Preferably, Ta 20, Tb 12, 0.8 e 1.2 are provided. Wherein, e takes 1 under rated refrigeration operating mode (inner ring temperature 27, outer loop temperature 35), when the inboard operating mode is higher, namely the inner ring temperature is higher, the value of e is bigger, when the outside operating mode is higher, namely the outer loop temperature is higher, the value of e is smaller.
S4, automatically entering an outdoor unit self-cleaning mode: the air conditioning unit enters a heating mode, the outer fan stops running, and when the temperature Tc of the outer disc is less than the first preset temperature Tc1After the first preset time t1 is continued, the air conditioning unit is switched to the refrigeration mode, and when the temperature Tc of the outer plate is greater than the second preset temperature Tc2And when the external fan rotates reversely for the second preset time t2, self-cleaning is completed, and the air conditioning unit returns to normal operation. Wherein t1 is more than or equal to 1 and less than or equal to 5min, and t2 is more than or equal to 1 and less than or equal to 10 min; a first predetermined temperature Tc1Is a temperature of less than 0 ℃, preferably-10. ltoreq. Tc1Not more than-5 ℃, and a second preset temperature Tc2Is a temperature greater than 0 ℃, preferably 2. ltoreq. Tc2≤6℃。
This automatically cleaning process simulation air conditioner outer machine frosts and the defrosting process, and after the air conditioning unit got into the mode of heating promptly, outer dish temperature began to reduce, after outer dish temperature is low to certain degree and keeps the certain time, outer machine can frosting, turns to the refrigeration mode with the air conditioner again this moment, and outer dish temperature risees, and outer machine frosting melts, takes away the foreign matter of outer quick-witted heat exchanger to through outer fan reversal, realize effective automatically cleaning. In other embodiments of the present invention, when the air conditioner operates in the heating mode, the self-cleaning of the filth blockage of the external unit can be directly performed by automatic defrosting.
In a second exemplary embodiment of the present invention, a method for detecting filth blockage and self-cleaning of an external unit of an air conditioner is provided. Fig. 2 is a flow chart of a method for detecting filth blockage and self-cleaning of an air conditioner external unit according to the invention. As shown in fig. 2, the method for detecting filth blockage and self-cleaning of an external unit of an air conditioner in the embodiment includes:
s101, after the air conditioning unit is started in a refrigeration mode, real-time detection of the outer disc temperature Tc, the outer ring temperature T0, the compressor exhaust temperature Tp and the outer fan rotating speed S is started;
s102, after the air conditioner runs for a preset time, calculating a primary difference value delta T1-Tp-Tc and delta T2-Tc-T0;
s103, if delta T1 is less than or equal to a and delta T2 is greater than or equal to b, an outdoor unit filth blockage code is reported, an outdoor unit filth blockage fault lamp continuously flickers to prompt a user that the outdoor unit filth is blocked, and the step S104 is switched to; otherwise, go to step S102;
where a, b are threshold values obtained from experiments, specifically,
a＝Ta*S/S0*e；
b＝Tb*S0/S*e；
e is a revision coefficient influenced by indoor and outdoor ambient temperatures, Ta is a first set temperature difference, S is the actual rotating speed of the outer fan obtained in the step S101, and S0 is the rated high-wind rotating speed of the outer fan; tb is the second set temperature difference.
Therefore, specific Ta and Tb are set according to actual test data, and the temperature data of tests such as a rated refrigeration test, a maximum operation refrigeration test, condenser intake anomaly and the like are obtained together by combining the heat transfer theory. In the present embodiment, Ta is 20, Tb is 12, and 0.8 ≧ e ≧ 1.2.
S104, reminding a user whether to select to enter an outdoor unit self-cleaning mode, and if so, entering the outdoor unit self-cleaning mode: the air conditioning unit enters a heating mode, the outer fan stops running, the air conditioning unit is switched to a refrigerating mode after the outer plate temperature Tc is less than or equal to minus 8 ℃ and is continuously 2min, the outer fan reversely rotates for 3min when the outer plate temperature Tc is greater than or equal to 3 ℃, self-cleaning is completed, and the air conditioning unit returns to normal running. This automatically cleaning process simulation air conditioner outer machine frosts and the defrosting process, and after the air conditioning unit got into the mode of heating promptly, outer dish temperature began to reduce, after outer dish temperature is low to certain degree and keeps the certain time, outer machine can frosting, turns to the refrigeration mode with the air conditioner again this moment, and outer dish temperature risees, and outer machine frosting melts, takes away the foreign matter of outer quick-witted heat exchanger to through outer fan reversal, realize effective automatically cleaning.
In a third exemplary embodiment of the present invention, an air conditioner is provided, in which a filth blockage detection is performed on an outdoor unit of the air conditioner by the method of the first exemplary embodiment. Specifically, the dirty blockage detection of the outdoor unit of the air conditioner utilizes various temperature sensors of the air conditioning unit, and comprises an outer disc temperature sensor arranged on an outdoor unit outer coil pipe and used for detecting the outer disc temperature Tc in real time; the outdoor temperature sensor is used for monitoring the outer ring temperature T0 in real time; the exhaust temperature sensor is arranged at the exhaust port of the compressor and is used for monitoring the exhaust temperature Tp of the compressor; the processor is electrically connected to the sensors and used for realizing dirty and blockage detection of the air conditioner external unit by executing the method in the first embodiment; a readable storage medium to store executable instructions. Preferably, the dirty and blocked detection device of the air conditioner external unit further comprises a rotation speed sensor installed on the external fan and used for monitoring the rotation speed S of the external fan. In other embodiments, the external fan speed S may also be calculated according to the current gear of the air conditioning unit.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. A filth blockage detection and self-cleaning method for an air conditioner outdoor unit is characterized by comprising the following steps:
judging the dirty and blocked condition of the condenser of the outer machine by obtaining the temperature Tc of an outer disc, the temperature T0 of an outer ring, the exhaust temperature Tp and the rotating speed S of the outer fan during the refrigeration operation of the air conditioner;
if the condenser of the external unit is judged to be dirty and blocked and needs to be self-cleaned, the condenser is self-cleaned by changing a refrigeration and heating mode and adjusting the steering of an external fan;
wherein, through obtaining outer dish temperature Tc, outer loop temperature T0 and exhaust temperature Tp and outer fan rotational speed S when air conditioner refrigeration operation, judge that outer machine condenser is dirty stifled the condition and include:
calculating a first temperature difference Δ T1 between the exhaust temperature Tp and the outer disc temperature Tc and a second temperature difference Δ T2 between the outer disc temperature Tc and the outer ring temperature T0;
if the condition that the delta T1 is less than or equal to a and the delta T2 is more than or equal to b is met, judging that the condenser of the outdoor unit is dirty and blocked;
the a and the b are calculated according to the following formula:
a＝Ta*S/S0*e；
b＝Tb*S0/S*e；
wherein e is a revision coefficient influenced by indoor and outdoor ambient temperatures, S is an actual outer fan rotating speed, S0 is a rated high wind rotating speed of the outer fan, and Ta is a first set temperature difference; tb sets for the difference in temperature for the second, first set for the difference in temperature, second set for the difference in temperature by the experimental test temperature data under the predetermined condition and set for.
2. The method of claim 1, wherein the determining that the outdoor unit condenser is dirty and clogged by obtaining the outer disc temperature Tc, the outer ring temperature T0, the exhaust temperature Tp and the outer fan speed S during the cooling operation of the air conditioner comprises:
s1, in the refrigeration mode, after the air conditioning unit is started, real-time detection of the outer disc temperature Tc, the outer ring temperature T0, the compressor exhaust temperature Tp and the outer fan rotating speed S is started;
s2, calculating a first temperature difference Δ T1-Tp-Tc and a second temperature difference Δ T2-Tc-T0 every time period T0;
s3, if the conditions that delta T1 is not more than a and delta T2 is not less than b are continuously met for n times, judging that the external machine is dirty and blocked; otherwise, go back to step S2; wherein n is more than or equal to 2.
3. The method of claim 1, wherein the tests include a rated refrigeration test, a maximum run refrigeration test, and a condenser intake anomaly test.
4. The method of claim 1, wherein e is 0.8-1.2, wherein e is higher when the temperature of the inner ring is higher, and is lower when the temperature of the outer ring is higher.
5. The method of claim 1, wherein if it is determined that the outdoor unit condenser is dirty and clogged and needs to be self-cleaned, the self-cleaning of the condenser by changing the cooling and heating mode and adjusting the direction of the external fan comprises:
the air conditioning unit enters a heating mode, the outer fan stops running, and when the temperature Tc of the outer plate is less than a first preset temperatureTc1After the first preset time t1 is continued, the air conditioning unit is switched to the refrigeration mode, and when the temperature Tc of the outer plate is greater than the second preset temperature Tc2And when the external fan rotates reversely for the second preset time t2, self-cleaning is completed, and the air conditioning unit returns to normal operation.
6. The method of claim 1, further comprising:
and if the judgment result shows that the condenser of the external unit is dirty and blocked, the air conditioner automatically enters an external unit self-cleaning mode, or whether the air conditioner enters the external unit self-cleaning mode is selected through user operation.
7. An air conditioner, comprising:
a readable storage medium to store executable instructions;
one or more processors configured to execute the method for outdoor unit filth blockage detection and self-cleaning according to the executable instructions of claims 1-6.
8. The air conditioner according to claim 7, further comprising: outer dish temperature sensor, outdoor temperature sensor, exhaust temperature sensor and outer fan speed sensor, treater electrical connection to outer dish temperature sensor, outdoor temperature sensor, exhaust temperature sensor and outer fan speed sensor.
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| CN110553377B (en) * | 2019-10-08 | 2021-09-21 | 芜湖美智空调设备有限公司 | Filth blockage detection method and system for outdoor heat exchanger of air conditioner and air conditioner |
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