CN110657553A - Filth blockage detection method for filter screen of air conditioner and computer storage medium - Google Patents
Filth blockage detection method for filter screen of air conditioner and computer storage medium Download PDFInfo
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- CN110657553A CN110657553A CN201810690745.3A CN201810690745A CN110657553A CN 110657553 A CN110657553 A CN 110657553A CN 201810690745 A CN201810690745 A CN 201810690745A CN 110657553 A CN110657553 A CN 110657553A
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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
- F24F11/39—Monitoring filter performance
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/52—Indication arrangements, e.g. displays
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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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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- 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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention provides a filth blockage detection method for a filter screen of an air conditioner and a computer storage medium, wherein the detection method comprises the following steps: monitoring the operation mode of the air conditioner from startup to shutdown; if the operation mode of the air conditioner in the process from starting to shutdown is kept unchanged, judging whether a filter screen of the air conditioner is dirty and blocked according to the fixed operation mode when the air conditioner is started next time; if the running mode of the air conditioner is changed from a refrigerating mode to a heating mode in the process from starting to shutting down, judging whether a filter screen of the air conditioner is dirty or not according to the state of a compressor of the air conditioner before the mode is switched after the mode of the air conditioner is switched. The detection method avoids the interference of the operation mode of the last operation period of the air conditioner or the manual mode switching on the filthy blockage detection of the filter screen later, and ensures the accuracy of the filthy blockage detection of the filter screen.
Description
Technical Field
The invention relates to the technical field of household appliances, in particular to a filth blockage detection method for a filter screen of an air conditioner and a computer storage medium.
Background
The air inlet of the air conditioner is generally covered with a filter screen for filtering air impurities and preventing dust from entering the indoor unit, and in the long-time use process of the air conditioner, if the filter screen is not cleaned for a long time, the air inlet volume of the indoor unit is influenced by a large amount of deposited dust on the filter screen, the refrigerating/heating effect of the air conditioner is reduced, and the electric quantity of the air conditioner is increased under the same load requirement. Meanwhile, the accumulated dust on the filter screen can also breed bacteria, and if the accumulated dust is not cleaned in time, the health of a user can be affected.
The conventional method for detecting whether the filter screen is dirty or not is generally implemented by timing, for example, by accumulating the operation time of the air conditioner, when the accumulated operation time of the air conditioner exceeds a set value, the filter screen is judged to be blocked, and a user is prompted to clean the filter screen. However, this detection method cannot be optimized according to the use environment of the user, and in a severe use environment, when the accumulated time is not reached, the air conditioner is actually blocked, however, the air conditioner cannot prompt the user to clean, and the user cannot timely and accurately clean the filter screen, which affects the use experience of the user.
Disclosure of Invention
In view of the above problems, it is an object of the present invention to provide a method for detecting filth blockage of a filter screen of an air conditioner and a computer storage medium, which overcome or at least partially solve the above problems.
A further object of the present invention is to improve the accuracy of the filth blockage detection of the filter screen and to prompt the user to clean the filter screen in time to keep the air conditioner clean.
According to one aspect of the present invention, the present invention provides a filth blockage detection method for a filter screen of an air conditioner, comprising:
monitoring the operation mode of the air conditioner from startup to shutdown;
if the operation mode of the air conditioner in the process from starting to shutdown is kept unchanged, judging whether a filter screen of the air conditioner is dirty and blocked according to the fixed operation mode when the air conditioner is started next time;
if the running mode of the air conditioner is changed from a refrigerating mode to a heating mode in the process from starting to shutting down, judging whether a filter screen of the air conditioner is dirty or not according to the state of a compressor of the air conditioner before the mode is switched after the mode of the air conditioner is switched.
Optionally, the step of determining whether a filter screen of the air conditioner is dirty or not according to the fixed operation mode specifically includes:
judging whether the fixed operation mode is a refrigeration mode or not and whether the fixed operation mode is a dehumidification mode or not;
if the fixed operation mode is not the refrigeration mode and is not the dehumidification mode, detecting the current of a fan of an indoor unit of the air conditioner at the current rotating speed when the air conditioner is started next time, obtaining the current value of the fan at the current rotating speed, and judging whether the filter screen is dirty or not according to the current value of the fan;
if the fixed operation mode is a refrigeration mode or a dehumidification mode, recording the time length from the current shutdown to the next startup of the air conditioner, recording the time for the shutdown of the air conditioner, and judging whether the filter screen is dirty and blocked according to the time for the shutdown.
Optionally, the step of judging whether the filter screen is dirty or not according to the shutdown time specifically includes:
comparing the shutdown time with a preset shutdown time;
if the shutdown time is equal to or greater than the preset shutdown time, detecting the current of the fan at the current rotating speed when the fan is started next time, obtaining the current value of the fan at the current rotating speed, and judging whether the filter screen is dirty and blocked according to the current value of the fan;
if the shutdown time is less than the preset shutdown time, judging the operation mode of the air conditioner when the air conditioner is started next time, and judging whether the filter screen is dirty and blocked according to the operation mode of the air conditioner when the air conditioner is started next time.
Optionally, the step of determining whether the filter screen is dirty or not according to the operation mode of the air conditioner when the air conditioner is started next time specifically includes:
if the operation mode of the air conditioner is a refrigeration mode or a dehumidification mode when the air conditioner is started next time, controlling the fan to operate at a first preset air speed for a first preset operation time, detecting the current of the fan at the current rotating speed to obtain the current value of the fan at the current rotating speed, and judging whether the filter screen is dirty and blocked according to the current value of the fan;
if the operation mode of the air conditioner is a heating mode when the air conditioner is started next time, controlling the fan to operate at a second preset air speed, monitoring the temperature of the coil pipe of the indoor heat exchanger in real time, detecting the current of the fan at the current rotating speed when the temperature of the coil pipe of the indoor heat exchanger is equal to or greater than the temperature of the first preset coil pipe, obtaining the current value of the fan at the current rotating speed, and judging whether the filter screen is dirty and blocked according to the current value of the fan;
the first preset wind speed is greater than the second preset wind speed.
Optionally, the step of judging whether the filter screen of the air conditioner is dirty or not according to the state of the compressor specifically includes:
judging whether a compressor is started or not when the air conditioner operates in a refrigerating mode before being switched to a heating mode;
if the compressor is not started, detecting the fan current of the indoor unit of the air conditioner when the air conditioner is switched to the heating mode, obtaining the fan current value at the current rotating speed, and judging whether the filter screen is dirty or not according to the fan current value at the current rotating speed.
Optionally, if the compressor is started, when the air conditioner is switched to the heating mode, the fan is controlled to operate at a third preset air speed, the temperature of the indoor heat exchanger coil is monitored in real time, when the temperature of the indoor heat exchanger coil is equal to or greater than the temperature of the second preset coil, the current of the fan at the current rotating speed is detected again, the current value of the fan at the current rotating speed is obtained, and whether the filter screen is dirty or blocked is judged according to the current value of the fan.
Optionally, the step of judging whether the filter screen is dirty or not according to the current value of the fan specifically includes:
comparing the current value of the fan at the current rotating speed with a preset current value at the same rotating speed;
and if the current value of the fan is less than or equal to the preset current value, judging that the filter screen is dirty and blocked.
Optionally, the preset current value is an average current of the fan, which is tested for multiple times under the following conditions;
the air inlet of the indoor unit is provided with at least two layers of clean filter screens, and the coil pipe of the indoor heat exchanger has no condensation.
Optionally, after the step of determining that the filter screen is dirty, the method further includes:
and sending reminding information for cleaning the filter screen to the user.
According to another aspect of the present invention, there is also provided a computer storage medium, wherein a computer program is stored, and when the computer program runs, the apparatus of the computer storage medium is caused to execute any one of the air conditioner filter screen filth blockage detection methods.
According to the method for detecting the filth blockage of the filter screen of the air conditioner, the change condition of the operation mode of the air conditioner in one operation period from startup to shutdown is monitored, the filth blockage of the filter screen in one mode is detected when the air conditioner is started next time aiming at the condition that the operation mode is not changed, and the filth blockage of the filter screen in the other mode is detected after the operation mode is switched aiming at the condition that the operation mode is switched, so that the interference of the operation mode or manual mode switching of the previous operation period of the air conditioner on the filth blockage detection of the filter screen is avoided, and the accuracy of the filth blockage detection of the filter screen is ensured.
Furthermore, in the method for detecting filth blockage of the filter screen of the air conditioner, the condensed water of the indoor heat exchanger is eliminated before the current of the fan is detected, so that the interference of the condensed water of the indoor heat exchanger on the detection of the current of the fan is avoided, the detected current of the fan can accurately reflect the filth blockage condition of the filter screen, the detection precision is improved, a user is timely and timely reminded of cleaning the filter screen, and the cleanness and the safety of indoor air are kept.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
fig. 1 is a schematic view illustrating a filth blockage detecting method for a filter screen of an air conditioner according to an embodiment of the present invention;
fig. 2 is a flowchart of a filth blockage detection method for a filter screen of an air conditioner according to an embodiment of the present invention; and
FIG. 3 is a schematic diagram of a computer storage medium according to one embodiment of the invention.
Detailed Description
Fig. 1 is a schematic diagram illustrating a method for detecting filth blockage of a filter screen of an air conditioner according to an embodiment of the present invention.
As shown in fig. 1, the method for detecting filth blockage of a filter screen of an air conditioner in the embodiment includes:
step S102, monitoring the operation mode of the air conditioner from startup to shutdown;
step S104, if the operation mode of the air conditioner in the process from starting to shutting down is kept unchanged, judging whether a filter screen of the air conditioner is dirty and blocked according to the fixed operation mode when the air conditioner is started next time;
and step S106, if the operation mode of the air conditioner is changed from the cooling mode to the heating mode in the process from the startup to the shutdown of the air conditioner, judging whether a filter screen of the air conditioner is dirty or not according to the state of a compressor of the air conditioner before the mode is switched after the mode of the air conditioner is switched.
When the air conditioner is started to operate, the operation mode of the air conditioner can be monitored in real time, and the operation mode is generally a refrigeration mode, a heating mode or a dehumidification mode and the like. In the operation period from the start to the shutdown of the air conditioner, the operation mode of the air conditioner may be kept unchanged, and the operation mode may be switched. The shutdown may refer to a state in which the power of the air conditioner is turned off or a state in which the air conditioner is in a power-on standby state.
In the operation period from the start to the shutdown of the air conditioner, if the operation mode is not changed, for example, the air conditioner is operated in the cooling mode all the time from the start to the shutdown, that is, the air conditioner is operated in a fixed operation mode in the time from the start to the shutdown, the filth blockage condition of the filter screen is judged according to the operation mode of the air conditioner in the last operation time period of the air conditioner when the air conditioner is started next time, that is, whether the filter screen is filth-blocked is judged according to the fixed operation mode when the air conditioner is started next time.
In the operation period from the power-on to the power-off of the air conditioner, if the operation mode is switched, particularly the operation mode is changed from the cooling mode to the heating mode, that is, the air conditioner is operated in the cooling mode after the power-on, and is switched to the heating mode after being operated in the cooling mode for a period of time. Based on the condition that the operation mode changes, after the air conditioner switches the mode, the dirty and blocked condition of the filter screen is judged according to the state of the compressor of the air conditioner before the mode is switched (namely, the state of the compressor during the operation in the cooling mode).
Therefore, according to the method for detecting filth blockage of the filter screen of the air conditioner, by monitoring the change condition of the running mode of the air conditioner in one running period from startup to shutdown, the filth blockage of the filter screen in one mode is detected when the air conditioner is started next time aiming at the condition that the running mode is not changed, and the filth blockage of the filter screen in the other mode is detected after the running mode is switched aiming at the condition that the running mode is switched, the interference of the running mode or artificial mode switching of the last running period of the air conditioner on the filth blockage detection of the filter screen is avoided, and the accuracy of the filth blockage detection of the filter screen is ensured.
In step S104, the step of determining whether the filter screen of the air conditioner is dirty or not according to the fixed operation mode specifically includes:
judging whether the fixed operation mode is a refrigeration mode or not and whether the fixed operation mode is a dehumidification mode or not;
if the fixed operation mode is not the refrigeration mode and is not the dehumidification mode, detecting the current of a fan of an indoor unit of the air conditioner at the current rotating speed when the air conditioner is started next time, obtaining the current value of the fan at the current rotating speed, and judging whether the filter screen is dirty or not according to the current value of the fan;
if the fixed operation mode is a refrigeration mode or a dehumidification mode, recording the time length from the current shutdown to the next startup of the air conditioner, recording the time for the shutdown of the air conditioner, and judging whether the filter screen is dirty and blocked according to the time for the shutdown.
The scheme that whether the filter screen is dirty or not is judged according to the current value of the fan by detecting the current value of the fan exists in the existing scheme, and the principle on which the scheme is based is as follows: in the operation process of the air conditioner, air firstly enters an indoor unit of the air conditioner through a filter screen at an air inlet, then passes through an indoor heat exchanger, exchanges heat with the heat exchanger and then is sent out through a fan. When the filter screen is dirty and blocked, the effective flow area of the filter screen can be reduced, the air inlet area of the air conditioner can be correspondingly reduced, and correspondingly, the air volume can be reduced to a certain degree. For the fans of the same indoor unit, the air volume is the load, the load is large when the air volume is large, the load is small when the air volume is small, and the load is in direct proportion to the current. If the filter screen is dirty stifled, the amount of wind descends, and the fan current value reduces, and when the filter screen is dirty stifled to a certain degree, the fan current value can descend to a certain degree, and the fan current value has certain corresponding relation with the dirty stifled condition of filter screen, and the accessible detects the fan current from this, judges the dirty stifled condition of filter screen according to the fan current value.
However, the inventor of the application finds that, for the air conditioner which judges the filter screen filth blockage situation by detecting the current value of the fan, in the use process of the air conditioner, a user feeds back the filter screen filth blockage reminding and is not completely accurate, when the filter screen filth blockage reminding is received, the user finds that the dust deposition amount of the filter screen is very small when the filter screen is prepared to be cleaned, and the user receives the filter screen filth blockage reminding too frequently, so that the use experience of the user is influenced. The inventor of this application further discovers according to experimental test that condensation on the indoor heat exchanger coil pipe influences fan current value great, and this is because the condensation of indoor heat exchanger coil pipe has reduced the amount of wind through indoor heat exchanger, has increased the windage, has reduced the amount of wind that flows to the fan, has reduced the load of fan, leads to the electric current of fan to reduce. Therefore, the change of the current value of the fan can be influenced by the filthy and blocked filter screen and the condensation of the indoor heat exchanger, namely, the condensation on the indoor heat exchanger can influence the current value of the fan, and if the filter screen is directly judged to be filthy and blocked by the current value of the fan, the interference of the influence factor of the condensation on the indoor heat exchanger on the current value of the fan cannot be avoided.
The generation of condensation on the indoor heat exchanger coil depends on the temperature difference between the evaporator coil and the air, and generally, when the air conditioner operates in a cooling mode or a dehumidifying mode, condensation is generated on the indoor heat exchanger coil. Therefore, in the embodiment, according to the change of the operation mode of the operation period from the shutdown to the startup of the air conditioner, the blockage situation of the filter screen is judged according to the operation situation of the previous operation period of the air conditioner when the air conditioner is started next time, so that the interference of the condensation on the indoor heat exchanger on the current value of the fan is eliminated.
Specifically, for the operation mode of the air conditioner in the last operation cycle (the operation process from the start-up to the shutdown is one operation cycle), it is necessary to perform the following process determination.
If the fixed operation mode is not the refrigeration mode or the dehumidification mode, the indoor heat exchanger coil pipe cannot form condensation, and the change of the current of the fan can accurately reflect the filth blockage condition of the filter screen, so that the current of the fan at the current rotating speed is directly detected when the fan is started next time, and the filter screen is judged to be filth blockage according to the detected current value of the fan, so that the filth blockage condition of the filter screen can be accurately judged, and the filth blockage condition can be timely fed back to a user.
If the operation mode of the air conditioner in the previous operation period is a fixed operation mode, and the fixed operation mode is a refrigeration mode or a dehumidification mode, the time length from the current shutdown of the air conditioner to the next startup of the air conditioner, that is, the shutdown time of the air conditioner, needs to be recorded, and whether the filter screen is dirty or not is judged according to the shutdown time. Specifically, the recorded shutdown time is compared with the preset shutdown time, if the shutdown time is equal to or greater than the preset shutdown time, it is indicated that the shutdown time of the air conditioner is long enough, and in this time period of shutdown, the condensed water on the indoor heat exchanger coil is eliminated (after the air conditioner is shut down, the temperature of the indoor heat exchanger coil is gradually consistent with the room temperature, and the condensed water on the indoor heat exchanger coil is gradually evaporated), so that the current of the fan cannot be affected.
And if the shutdown time of the air conditioner is less than the preset time, the shutdown time of the air conditioner is over short, the condensed water on the coil pipe of the indoor heat exchanger is not enough to be eliminated, the condensed water can interfere with the judgment of the filthy blockage condition of the filter screen, and therefore the condensed water needs to be eliminated firstly when the air conditioner is started again, and the filthy blockage condition of the filter screen is judged according to the current value of the fan. That is to say: if the shutdown time is less than the preset shutdown time, judging the operation mode of the air conditioner when the air conditioner is started next time, and judging whether the filter screen is dirty and blocked according to the operation mode of the air conditioner when the air conditioner is started next time.
The inventor of the application meets the specific duration of eliminating the shutdown time of the condensed water of the indoor heat exchanger through experimental tests, and finds that the condensed water of the indoor heat exchanger is basically eliminated when the shutdown time of the air conditioner is equal to or more than 1 hour through multiple experimental tests, so that the preset time can be 1 hour in the embodiment.
Specifically, if the operation mode of the air conditioner is the cooling mode or the dehumidification mode when the air conditioner is started next time, the fan is firstly controlled to operate for a first preset time at a first preset air speed, the first preset air speed is a high-wind speed, for example, the first preset air speed is 1050-1150 revolutions per minute, the first preset time can be 4-8 minutes, evaporation of condensed water on a coil pipe of the indoor heat exchanger is accelerated by operating the high-wind speed after the air conditioner is started, the influence of the condensed water is eliminated, then the current of the fan at the current rotating speed is detected, the filth blockage condition of the filter screen can be accurately reflected according to the detected current value of the fan at the moment, and the interference of the condensed water of the indoor heat exchanger is avoided.
And if the operation mode of the air conditioner is the heating mode when the air conditioner is started next time, firstly controlling the fan to operate at a second preset air speed, monitoring the temperature of the indoor heat exchanger coil in real time, and detecting the current of the fan at the current rotating speed when the temperature of the indoor heat exchanger coil is equal to or greater than the temperature of the first preset coil. The second preset wind speed is less than the first preset wind speed, and may be a low wind speed, for example, the second preset wind speed is 700 to 850 rpm. Because the air conditioner operates with the mode of heating when this time is started, can eliminate the condensation water more easily, consequently, can control the fan and operate with the low wind, along with the operation of air conditioner, the temperature of indoor heat exchanger coil pipe risees gradually, condensation water on it evaporates gradually, when the coil pipe temperature rises to equal to or be greater than first preset coil pipe temperature, explain that the coil pipe temperature rises to a certain extent, at this moment, condensation water on the coil pipe has basically been eliminated and has finished, detect fan current again this moment, this fan current can accurately reflect the dirty stifled condition of filter screen, avoid the interference of indoor heat exchanger's condensation. Wherein, the value range of the first preset coil temperature can be 35-40 ℃.
However, in the case where the operation mode of the air conditioner changes in the last operation period (the operation process from the power-on to the power-off is one operation period), the following specific determination needs to be performed.
As described above, if the air conditioner is operated in the cooling mode for a certain time and then switched from the cooling mode to the heating mode during the operation period from the start to the shutdown of the air conditioner, the filter screen filth blockage condition should be determined according to the state of the compressor in the cooling mode before the air conditioner is switched. Specifically, whether the compressor is started or not when the air conditioner is operated in a refrigeration mode before being switched to a heating mode is judged, if the compressor is not started, the fact that a refrigerant does not continuously circulate between an indoor unit and an outdoor unit is indicated, the temperature difference of a coil pipe of the indoor heat exchanger is small, the possibility of forming condensed water on the coil pipe is small or less condensed water is formed, based on the situation, when the air conditioner is switched to the heating mode, the fan current can be detected when the fan is started, and the fan current at the moment can directly and accurately reflect the filth blockage condition of the filter screen.
And if the air conditioner is operated in a cooling mode before being switched to a heating mode, the compressor is started and is in normal operation, and a refrigerant is continuously circulated between the indoor unit and the outdoor unit, the temperature difference of the coil pipe of the indoor heat exchanger is large, and more condensed water is formed on the coil pipe, so that when the air conditioner is switched to the heating mode, the fan is required to be firstly controlled to operate at a third preset air speed which can be a weak air speed, for example, the third preset air speed is less than the second preset air speed, for example, the third preset air speed is 700 rpm, so that the fan operates at the weak air, the temperature of the coil pipe of the indoor heat exchanger is monitored in real time, along with the operation of the air conditioner in the heating mode, the temperature of the coil pipe of the indoor heat exchanger gradually rises, the condensed water on the coil pipe is gradually evaporated, and when the temperature of the coil pipe rises to be equal to or more than, the temperature of the coil pipe rises to a certain degree, at the moment, the condensed water on the coil pipe is basically eliminated, at the moment, the current of the fan is detected, the current of the fan can accurately reflect the filth blockage condition of the filter screen, and the interference of the condensed water of the indoor heat exchanger is avoided. The second preset coil temperature may be substantially the same as the first preset coil temperature, for example, the value range of the second preset coil temperature is 35 to 40 ℃.
The step of judging whether the filter screen is dirty or not according to the current value of the fan specifically comprises the following steps: the method comprises the steps of firstly comparing the current value of a fan at the current rotating speed with a preset current value at the same rotating speed, if the current value of the fan is smaller than or equal to the preset current value, indicating that the load of the fan is smaller, reflecting that the air volume entering an indoor unit is smaller, indicating that the filter screen is seriously clogged, and therefore determining that the filter screen needs to be cleaned in time. After the filter screen is judged to be dirty and blocked, the air conditioner can send reminding information for cleaning the filter screen to a user so as to remind the user to clean the filter screen in time and ensure the cleanness and safety of indoor air.
The preset current value is a measured value under a certain condition before the air conditioner leaves a factory. Specifically, the measurement of the preset current value needs to satisfy the following condition: at least two layers of clean filter screens are arranged at an air inlet of an indoor unit of the air conditioner, the current of the fan is measured under the condition that an indoor heat exchanger coil pipe is not condensed, multiple tests are carried out on the fan at each rotating speed, and the average value of the multiple tests is used as the preset current value of the fan at the rotating speed.
When the preset current value is determined, the inventor of the application tests the simulation of a single-layer clean filter screen and a multi-layer (more than two layers) clean filter screen through continuous experiments, and determines the current value determined according to the two layers of clean filter screens as the preset current value.
Fig. 2 is a flowchart of a filth blockage detection method for a filter screen of an air conditioner according to an embodiment of the present invention. As shown in fig. 2, fig. 2 exemplarily shows a flow chart of a filth blockage detection method for a filter screen of an air conditioner, and the detection method includes:
step S202, monitoring the operation mode of the air conditioner from startup to shutdown;
step S204, determining whether the operation mode is changed, if the operation mode is a fixed mode (not changed), switching to step S206, and if the operation mode is changed, switching to step S218;
step S206, judging whether the operation mode is always a refrigeration mode or a dehumidification mode, if the operation mode is always the refrigeration mode or the dehumidification mode, switching to step S208, and if the operation mode is neither the refrigeration mode nor the dehumidification mode, executing step S220;
step S208, recording the time from the current shutdown to the next startup as shutdown time T;
step S210, judging whether the shutdown time T is equal to or greater than the preset shutdown time TPreparation ofIf yes, go to step S220, otherwise, go to step S212;
step S212, judging the operation mode of the air conditioner when the air conditioner is started next time;
step S214, if the operation mode of the air conditioner is a refrigeration or dehumidification mode when the air conditioner is started next time, controlling the fan to operate for 5 minutes in high wind, and then executing step S228;
step S216, if the operation mode of the air conditioner is the heating mode when the air conditioner is started next time, controlling the fan to run at low wind until the temperature of the coil pipe of the indoor heat exchanger is more than 40 ℃, and then executing step S228;
step S218, determining whether the operation mode is switched from the cooling mode to the heating mode, if so, switching to step S222, otherwise, executing step S220;
step S220, detecting the current of the fan at the current rotating speed when the fan is started next time, comparing the current value of the fan at the current rotating speed with a preset current value at the same rotating speed, if the current value of the fan is less than or equal to the preset current value, judging that the filter screen is dirty and blocked, otherwise, not dirty and blocked;
step S222, judging whether the compressor is started or not when the air conditioner operates in the refrigeration mode before switching, if not, switching to step S224, and if so, switching to step S226;
step S224, when the operation mode is switched from the cooling mode to the heating mode, step S228 is executed;
step S226, when the operation mode is switched from the refrigeration mode to the heating mode, controlling the fan to operate by weak wind until the temperature of the coil pipe of the heat exchanger is more than 40 ℃, and then executing step S228;
step S228, detecting a current of the fan at the current rotation speed, comparing a fan current value at the current rotation speed with a preset current value at the same rotation speed, if the fan current value is less than or equal to the preset current value, determining that the filter screen is dirty and blocked, otherwise, the filter screen is not dirty and blocked.
During the refrigeration or dehumidification operation process, condensed water exists on the surface of the indoor heat exchanger, the condensed water can affect the current of the fan, the current difference can be detected only by detecting the current of the fan without considering the interference of the condensed water, and the misjudgment of the filthy and blocking condition of the filter screen is easily caused. According to the method for detecting filth blockage of the filter screen of the air conditioner, according to the change condition of the operation mode of the air conditioner in a period from startup to shutdown, filth blockage conditions of the filter screen are judged in different modes according to the condition that the operation mode changes and the condition that the operation mode does not change, after condensed water of an indoor heat exchanger is eliminated, the current of a fan is detected, and whether the filter screen is filth-blocked or not is judged according to the current value of the fan. Therefore, the interference of the condensed water of the indoor heat exchanger on current detection is eliminated, and the detected current of the fan can accurately reflect the filth blockage condition of the filter screen, so that the detection precision is improved, a user is timely and timely reminded of cleaning the filter screen, and the cleanness and the safety of indoor air are kept.
The embodiment further provides a computer storage medium 300, and fig. 3 is a schematic diagram of the computer storage medium 300 according to an embodiment of the present invention, where the computer storage medium 300 stores a computer program 310, and when the computer program 310 runs, the apparatus in the computer storage medium 300 is caused to execute the air conditioner filter screen filth blockage detection method according to any of the embodiments described above. The device where the computer storage medium 300 is located is an air conditioner, and the air conditioner may perform the method for detecting filth blockage of a filter screen of the air conditioner according to any of the embodiments.
The computer storage medium 300 of the present embodiment may be an electronic memory such as a flash memory, an EEPROM (electrically erasable and programmable read only memory), an EPROM, a hard disk, or a ROM. The computer storage medium 300 has storage space for a computer program 310 for performing any of the method steps of the above-described method. These computer programs 310 may be read from or written to one or more computer program products. These computer program products comprise a program code carrier such as a hard disk, a Compact Disc (CD), a memory card or a floppy disk. The computer program 310 may be executed by a device of the computer storage medium 300 to perform the steps of the method described above.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (10)
1. A filth blockage detection method for a filter screen of an air conditioner comprises the following steps:
monitoring the operation mode of the air conditioner from startup to shutdown;
if the operation mode of the air conditioner in the process from starting to shutting down is kept unchanged, judging whether a filter screen of the air conditioner is dirty and blocked according to the fixed operation mode when the air conditioner is started next time;
if the running mode of the air conditioner is changed from a refrigerating mode to a heating mode in the process from starting to shutting down, judging whether a filter screen of the air conditioner is dirty and blocked or not according to the state of a compressor of the air conditioner before the air conditioner is switched into the mode after the air conditioner is switched into the mode.
2. The detection method according to claim 1, wherein the step of determining whether a filter screen of the air conditioner is dirty or not according to the fixed operation mode specifically comprises:
judging whether the fixed operation mode is a refrigeration mode or not and whether the fixed operation mode is a dehumidification mode or not;
if the fixed operation mode is not a refrigeration mode and is not a dehumidification mode, detecting the current of a fan of an indoor unit of the air conditioner at the current rotating speed when the air conditioner is started next time, obtaining the current value of the fan at the current rotating speed, and judging whether the filter screen is dirty and blocked according to the current value of the fan;
if the fixed operation mode is a refrigeration mode or a dehumidification mode, recording the time length from the current shutdown to the next startup of the air conditioner, recording the time length as the shutdown time of the air conditioner, and judging whether the filter screen is dirty and blocked according to the shutdown time.
3. The detection method according to claim 2, wherein the step of determining whether the filter screen is dirty or not according to the shutdown time specifically comprises:
comparing the shutdown time with a preset shutdown time;
if the shutdown time is equal to or greater than the preset shutdown time, detecting the current of the fan at the current rotating speed when the fan is started next time, obtaining the current value of the fan at the current rotating speed, and judging whether the filter screen is dirty and blocked according to the current value of the fan;
and if the shutdown time is less than the preset shutdown time, judging the running mode of the air conditioner when the air conditioner is started next time, and judging whether the filter screen is dirty and blocked according to the running mode of the air conditioner when the air conditioner is started next time.
4. The detection method according to claim 3, wherein the step of determining whether the filter screen is dirty or not according to the operation mode of the air conditioner when the air conditioner is started next time specifically comprises:
if the operation mode of the air conditioner is a refrigeration mode or a dehumidification mode when the air conditioner is started next time, controlling the fan to operate at a first preset air speed for a first preset operation time, detecting the current of the fan at the current rotating speed, obtaining the current value of the fan at the current rotating speed, and judging whether the filter screen is dirty and blocked according to the current value of the fan;
if the operation mode of the air conditioner is a heating mode when the air conditioner is started next time, controlling the fan to operate at a second preset air speed, monitoring the temperature of an indoor heat exchanger coil in real time, detecting the current of the fan at the current rotating speed when the temperature of the indoor heat exchanger coil is equal to or greater than the temperature of a first preset coil, obtaining the current value of the fan at the current rotating speed, and judging whether the filter screen is dirty and blocked according to the current value of the fan;
the first preset wind speed is greater than the second preset wind speed.
5. The detection method according to claim 1, wherein the step of determining whether a filter screen of the air conditioner is dirty or not according to the state of the compressor specifically comprises:
judging whether the compressor is started or not when the air conditioner operates in a refrigerating mode before being switched to a heating mode;
if the compressor is not started, detecting the fan current of the indoor unit of the air conditioner when the air conditioner is switched to a heating mode, obtaining the fan current value at the current rotating speed, and judging whether the filter screen is dirty or not according to the fan current value at the current rotating speed.
6. The detection method according to claim 5, wherein
If the compressor is started, when the air conditioner is switched to a heating mode, the fan is controlled to operate at a third preset air speed, the temperature of the indoor heat exchanger coil is monitored in real time, when the temperature of the indoor heat exchanger coil is equal to or greater than the temperature of a second preset coil, the current of the fan at the current rotating speed is detected again, the current value of the fan at the current rotating speed is obtained, and whether the filter screen is dirty or blocked is judged according to the current value of the fan.
7. The detection method according to any one of claims 2 to 6, wherein the step of judging whether the filter screen is dirty or not according to the fan current value specifically comprises:
comparing the current value of the fan at the current rotating speed with a preset current value at the same rotating speed;
and if the current value of the fan is smaller than or equal to the preset current value, judging that the filter screen is dirty and blocked.
8. The detection method according to claim 7, wherein
The preset current value is the average current of the fan tested for multiple times under the following conditions;
the air inlet of the indoor unit is provided with at least two layers of clean filter screens, and the coil pipe of the indoor heat exchanger has no condensation.
9. The detection method according to claim 7, further comprising, after the step of determining that the filter screen is dirty:
and sending reminding information for cleaning the filter screen to the user.
10. A computer storage medium having a computer program stored therein, the computer program when executed causing an apparatus of the computer storage medium to perform the air conditioner filter screen filth blockage detection method according to any one of claims 1 to 9.
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Effective date of registration: 20201211 Address after: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Applicant after: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. Applicant after: Haier Zhijia Co.,Ltd. Address before: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Applicant before: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. |
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