CN111059697A - Filter screen filth blockage detection method and device and air conditioner - Google Patents
Filter screen filth blockage detection method and device and air conditioner Download PDFInfo
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- CN111059697A CN111059697A CN201911425552.6A CN201911425552A CN111059697A CN 111059697 A CN111059697 A CN 111059697A CN 201911425552 A CN201911425552 A CN 201911425552A CN 111059697 A CN111059697 A CN 111059697A
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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
- F24F11/61—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
- 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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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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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- 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
- F24F2140/40—Damper positions, e.g. open or closed
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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
- F24F2140/50—Load
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Abstract
The invention discloses a filter screen filth blockage detection method and device and an air conditioner, relates to the technical field related to air conditioning, and is used for solving the problems of low reliability and low detection efficiency of filter screen filth blockage detection in the conventional filter screen filth blockage detection method. The invention provides a filter screen filth blockage detection method which is applied to air treatment equipment, and the filter screen filth blockage detection method comprises the following steps: acquiring the current temperature of an intelligent power module in the air treatment equipment; and comparing the current temperature with the preset temperature of the intelligent power module, and if the current temperature is less than or equal to the preset temperature, determining that the filter screen is dirty and blocked. The filter screen filth blockage detection method is used for detecting whether the filter screen in the air treatment equipment is filth blocked.
Description
Technical Field
The invention relates to the technical field of air conditioning, in particular to a filter screen filth blockage detection method and device and an air conditioner.
Background
The air conditioner filter screen is an important device for filtering air impurities and preventing dust from entering an evaporator of the indoor unit, and when the air conditioner is used for a long time and the air conditioner filter screen is not cleaned, the air conditioner filter screen is full of dust and impurities, so that the air intake of the indoor unit of the air conditioner is influenced, the refrigerating and heating effects of the air conditioner are poor, and the power consumption of the air conditioner is increased under the same load requirement; and many bacteria can be bred on the air-conditioning filter screen, peculiar smell is generated, and therefore indoor air quality is reduced, and troubles are brought to family life of users.
The filter screen filth blockage detection method in the prior art comprises the following steps: controlling a fan of an indoor unit of an air conditioner to run to a set windshield, detecting the current of the fan in the actual running process according to the set windshield, and detecting the preset filth blockage current of the fan when a filter screen is filth-blocked and the fan runs according to the set windshield; comparing the current with a preset filth blockage current, and determining that a filter screen arranged at an air inlet in the air conditioner is filth blocked when the current is less than or equal to the preset filth blockage current.
According to the filter screen filth blockage detection method, the detected current of the fan is compared with the preset filth blockage current, and due to the fact that the current sensor and the current transformer are expensive, in order to reduce the manufacturing cost of fan driving at present, single-resistor sampling is adopted, the collected current can be influenced by a current sampling mode, and due to the fact that the problem of signal delay exists in all circuits, the collected current can be influenced by the current collection time. In addition, the three-phase current is a current value obtained by reconstructing calculation through a driving algorithm of the motor, so that the error between the acquired current and the actual current is further increased, therefore, the control method of the air conditioning system cannot accurately reflect the actual filth blockage situation of the filter screen through the current value, so that the reliability of filth blockage detection of the filter screen is low, and the current also needs to be reconstructed through the driving algorithm, so that the detection efficiency of filth blockage detection of the filter screen is low.
Disclosure of Invention
The invention provides a filter screen filth blockage detection method and device and an air conditioner, which are used for solving the problems of low reliability and low detection efficiency of filter screen filth blockage detection in the conventional filter screen filth blockage detection method.
In order to achieve the purpose, the filter screen filth blockage detection method provided by the invention is applied to air treatment equipment, and comprises the following steps: acquiring the current temperature of an intelligent power module in the air treatment equipment; and comparing the current temperature with the preset temperature of the intelligent power module, and if the current temperature is less than or equal to the preset temperature, determining that the filter screen is dirty and blocked.
Compared with the prior art, the filter screen filth blockage detection method provided by the embodiment of the invention judges whether the filter screen is filth-blocked according to the current temperature of the intelligent power module in the air treatment equipment, and the temperature change of the intelligent power module is in positive correlation with the current change caused by filth blockage of the filter screen, so that if the current temperature of the intelligent power module is less than or equal to the preset temperature of the intelligent power module, the current of a fan is smaller, the current load of the fan is smaller, and the air inlet volume of the air treatment equipment is smaller, namely, the filter screen at the air inlet of the air treatment equipment is filth-blocked, the current change caused by filth blockage of the filter screen can be truly reflected by detecting the temperature change of the intelligent power module, the detection reliability is higher, and the filter screen filth blockage detection method directly compares the temperature detection result with the preset temperature, the temperature detection result does not need to be reconstructed by a driving algorithm, and the time spent in the detection process is short, so that the detection efficiency of the filth blockage detection of the filter screen is improved.
On the other hand, the embodiment of the invention also provides a filter screen filth blockage detection device, which is applied to air treatment equipment, wherein the air treatment equipment comprises an intelligent power module, and the filter screen filth blockage detection device comprises: the temperature detection device is used for detecting the current temperature of the intelligent power module; the storage device is used for storing the preset temperature of the intelligent power module; the controller, temperature-detecting device with storage device with the equal electricity of controller is connected, the controller basis temperature-detecting device detects intelligent power module current temperature with the temperature of predetermineeing in the storage device is saved, judges to be installed whether dirty stifled takes place for the filter screen of air handling equipment air intake department.
Compared with the prior art, the filter screen filth blockage detection device provided by the embodiment of the invention comprises a temperature detection device, wherein the temperature detection device feeds the detected current temperature of the intelligent power module back to the controller, the controller compares the feedback information with the preset temperature stored in the storage device after receiving the feedback information and judges whether filth blockage exists in the filter screen, and the current change caused by filth blockage of the filter screen is positively correlated with the temperature of the intelligent power module, so that if the current temperature of the intelligent power module is less than or equal to the preset temperature of the intelligent power module, the current of the fan is smaller, the current load of the fan is smaller, the air intake of the air treatment equipment is smaller, namely, the filter screen at the air inlet of the air treatment equipment is filth-blocked; if the current temperature of the intelligent power module is higher than the preset temperature of the intelligent power module, the current of the fan is larger, the current load of the fan is larger, the air inlet volume of the air treatment equipment is larger, namely the filter screen at the air inlet of the air treatment equipment is not dirty and blocked, so that the current change caused by the dirty and blocked filter screen can be truly reflected by detecting the temperature change of the intelligent power module, the detection reliability is higher, the detection result of the temperature detection is directly fed back to the controller and is not required to be reconstructed through a driving algorithm, the time spent in the detection process is shorter, and the detection efficiency of the dirty and blocked filter screen detection is improved.
On the other hand, the embodiment of the invention also provides an air conditioner comprising the filter screen filth blockage detection device.
Because the filter screen filth blockage detection device used in the air conditioner of the embodiment of the invention is the same as the filter screen filth blockage detection devices provided in the embodiments, the two devices can solve the same technical problem and achieve the same expected effect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart of a control method of an air conditioning system according to an embodiment of the present invention;
fig. 2 is a flowchart of a control method for performing temperature compensation on the current temperature of the intelligent power module by the air conditioning system according to the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to specific embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
With the development of the air conditioner to health and energy conservation, the newly added functions of the air conditioner are related to health more and more. The air conditioner filter screen is a core component of the air conditioner, the filth blockage of the air conditioner filter screen can reduce the air output of the air conditioner, a lot of bacteria can be bred on the air conditioner filter screen, the bacteria are scattered indoors along with the air output of the air conditioner, harm can be caused to human health, and the indoor environment has special peculiar smell, so that the cleanness of the air conditioner filter screen is very important to maintain.
An IPM (Intelligent Power Module) is an advanced Power switch device, and has the advantages of GTR (Giant Transistor, high Power Transistor) high current density, low saturation voltage and high voltage resistance, and also has the advantages of MOSFET (Metal Oxide Semiconductor Field Effect Transistor) high input impedance, high switching frequency and low driving Power. Logic, control, detection and protection circuits are Integrated in the IPM, the IPM is convenient to use, the size and the development time of a system are reduced, the reliability of the system is greatly enhanced, the IPM is suitable for the development direction of the current Power device to modularization, compounding and PIC (Power Integrated Circuit), the IPM is widely applied to the field of Power electronics, and the IPM is also widely applied to an air conditioning system.
Referring to fig. 1, the air conditioning system control method provided by the present invention is applied to an air treatment device, and the filter screen filth blockage detection method includes: acquiring the current temperature T of the intelligent power module in the air treatment equipmentIPM(i) (ii) a Comparing the current temperature TIPM(i) With preset temperature T 'of intelligent power module'IPMIf the current temperature T isIPM(i) Is less than or equal to preset temperature T'IPMAnd determining that the filter screen is dirty and blocked. The above comparison of the current temperature TIPM(i) With preset temperature T 'of intelligent power module'IPMThe operation of the filter screen can be executed through a control module in a main controller in the air processing equipment, and also can be executed through a specially-arranged sub-controller for determining whether the filter screen is dirty or not in the air processing equipment; the air treatment equipment comprises a temperature detection device for detecting the current temperature T of the intelligent power moduleIPM(i) The air treatment equipment also comprises a storage device,storage device is used for storing preset temperature T 'of intelligent power module'IPM。
Compared with the prior art, the filter screen filth blockage detection method provided by the embodiment of the invention is based on the current temperature T of the intelligent power module in the air treatment equipmentIPM(i) Judging whether the filter screen is dirty or not, wherein the temperature change of the intelligent power module is positively correlated with the current change caused by the dirty and blocked filter screen, so that if the current temperature T of the intelligent power module is higher than the preset temperature TIPM(i) Is less than or equal to preset temperature T 'of intelligent power module'IPMIf the current of the fan is low, the current load of the fan is low, and the air inlet volume of the air processing equipment is low, namely the filter screen at the air inlet of the air processing equipment is dirty and blocked, the current change caused by dirty and blocked filter screen can be truly reflected by detecting the temperature change of the intelligent power module, the detection reliability is high, and the filter screen dirty and blocked detection method is to detect the result of the temperature detection and the preset temperature T'IPMThe direct comparison is carried out, the temperature detection result does not need to be reconstructed by a driving algorithm, and the time spent in the detection process is short, so that the detection efficiency of the filth blockage detection of the filter screen is improved.
It should be noted that: the preset temperature T'IPMComprises a first preset temperature T1'IPMAnd a second preset temperature T2'IPMAnd a third preset temperature T3'IPMWherein the first preset temperature T1'IPMIs a preset temperature T2 'measured when the filter screen is in mild filth blockage'IPMIs a preset temperature T3 'measured when the filter screen is in severe filth blockage'IPMThe preset temperature is measured when the filter screen is completely dirty and blocked.
Alternatively, if the current temperature TIPM(i) Is greater than or equal to a first preset temperature T1'IPMAnd is less than a second preset temperature T2'IPMI.e. T1'IPM≤TIPM(i)＜T2'IPMDetermining that the filter screen is in a mild filth blockage state; if the current temperature T isIPM(i) Is greater than or equal to a second preset temperature T2'IPMAnd is less than a third preset temperature T3'IPMI.e. T2'IPM≤TIPM(i)＜T3'IPMDetermining that the filter screen is in a severe filth blockage state; if the current temperature T isIPM(i) Is greater than or equal to a third preset temperature T3'IPMI.e. T3'IPM≤TIPM(i) And determining that the filter screen is in a complete dirty and blocked state.
Referring to fig. 2, before obtaining the current temperature of the smart power module in the air treatment device, the method further includes: acquiring the running time t of the air treatment equipment; comparing the operation time t with the preset operation time tPreset of(ii) a If the running time t is greater than or equal to the preset running time tPreset ofThen obtaining the current temperature T of the intelligent power module in the air treatment equipment is executedIPM(i) The step (2). The air treatment equipment further comprises a timing device, the timing device is used for recording the running time t of the air treatment equipment, and the storage device is further used for storing the preset running time tPreset of. Reaching the preset operation time t when the operation time t of the air treatment equipment reaches the preset operation time tPreset ofThen, the air processing equipment is in a steady state, and the acquisition of the current temperature T of the intelligent power module in the air processing equipment is executed at the momentIPM(i) The obtained current temperature T of the intelligent power moduleIPM(i) The detection method is accurate, so that the accuracy of filth blockage detection of the filter screen can be further improved.
Based on the above embodiment, if the operation time t is greater than or equal to the preset operation time tPreset ofThen, the method further comprises the following steps: obtaining the current ambient temperature T of a main control panel of an air treatment devicea(ii) a Comparing the current ambient temperature TaAnd preset ambient temperature T'a(ii) a If the current ambient temperature TaAnd preset ambient temperature T'aIf not, adjusting the current temperature T of the intelligent power moduleIPM(i) In that respect The air treatment equipment further comprises an ambient temperature detection device, and the ambient temperature detection device detects the current ambient temperature T of the main control board of the air treatment equipmentaThe storage device is also used for storing preset ambient temperature T'a。
If the operation time t is greater than or equal to the preset operation time tPreset ofThen, obtainCurrent ambient temperature T of a main control panel of an air treatment deviceaAt this time, because the air processing equipment has operated the preset operation time, the operation state of the air processing equipment has reached the steady state, and the ambient temperature T at which the main control board of the air processing equipment is currently located is obtained at this timeaThe method is accurate.
When the ambient temperature detecting device detects the current ambient temperature TaAnd preset ambient temperature T'aWhen the temperature T is not equal to the preset temperature T, the ambient temperature T of the main control board of the air treatment equipment is shownaSurpass preset ambient temperature T'aOr presetting an environment temperature range, and ensuring the current temperature T of the intelligent power module at the momentIPM(i) The accuracy of (2) requires the current temperature T of the smart power moduleIPM(i) And (4) performing temperature compensation, and adjusting the temperature to enable the temperature to be more matched with the current operating condition of the air treatment equipment.
Further, if the current ambient temperature TaAnd preset ambient temperature T'aIf not, adjusting the current temperature TIPM(i) The method specifically comprises the following steps: if the current ambient temperature TaAnd preset ambient temperature T'aIf not, then calculate the current ambient temperature TaMinus a preset ambient temperature T'aIs equal to (i.e., Δ T ═ T)a-T'a) (ii) a If the difference value delta T is more than 0 ℃, the current temperature TIPM(i) Satisfies the following conditions: t isIPM(i)＝TIPM(i-1) + Δ T; if the difference value delta T is less than 0 ℃, the current temperature T isIPM(i) Satisfies the following conditions: t isIPM(i)＝TIPM(i-1) - | Δ T |. The controller also comprises a processing module which is used for processing to obtain the current environment temperature TaMinus a preset ambient temperature T'aThe difference Δ T of (d).
If the difference value delta T is more than 0 ℃, the current environment temperature T is indicatedaGreater than preset ambient temperature T'aDue to the ambient temperature TaIs positively correlated with the relationship between the temperature of the smart power module, so that if the current ambient temperature T is presentaGreater than preset ambient temperature T'aI.e. indicating that the actual temperature of the smart power module is greater than the detected current temperatureDegree TIPM(i) Whereby the current temperature T needs to be adjustedIPM(i) So that T isIPM(i)＝TIPM(i-1)+ΔT。
Similarly, if the current ambient temperature T isaIs less than preset ambient temperature T'aI.e. indicating that the actual temperature of the smart power module is less than the detected current temperature TIPM(i) Whereby the current temperature T needs to be adjustedIPM(i) So that T isIPM(i)＝TIPM(i-1)-|ΔT|。
Optionally, an air deflector is arranged at the air outlet of the air treatment device, and the current temperature T is comparedIPM(i) With preset temperature T 'of intelligent power module'IPMBefore, still include: presetting an ambient temperature T 'when the fan is under different running windscreens and the air deflector is in a static state'aAnd a preset temperature T'IPMA first relation correspondence table therebetween; and presetting the environmental temperature T when the fan is under different running windscreens and the air deflector is in a swing state "aAnd a preset temperature T'IPMA second relationship correspondence table therebetween; acquiring a current running windshield N of a fan; judging the current state of the air deflector; if the air deflector is in a static state and the current environment temperature is equal to the preset environment temperature, searching the corresponding preset temperature in the first relation corresponding table according to the current running windshield; and if the air deflector is in a swinging state and the current environment temperature is equal to the preset environment temperature, searching the corresponding preset temperature in the second relation corresponding table according to the current running windshield. The storage device is further used for storing the first relation corresponding table and the second relation corresponding table.
The controller knows the running windshield N of the fan through the rotating speed of the fan, then obtains the current state of the air deflector, and knows whether the current air deflector is in a static state or in a swinging state, wherein the static state of the air deflector refers to the initial position of the air deflector after the air conditioner is started, and can also be the position of the air deflector when a user manually adjusts the air deflector to any position. The swing state is the state of the air deflector when the user realizes the up-and-down swing or the left-and-right swing of the air deflector through the air swing function key on the air conditioner remote controller. The remote controller sends out a wind swinging instruction, and the controller indicates that the current air deflector is in a swinging state after receiving the wind swinging instruction; on the contrary, if the controller does not receive the air swinging instruction during the filth blockage detection of the filter screen, the current air deflector is in a static state. The controller judges whether the running windshield of the fan and the environment temperature of the main control board of the air treatment equipment are searched in the first relation table or the second relation table according to the position information, and the preset temperature of the intelligent power module corresponding to the running windshield of the fan and the environment temperature of the main control board of the air treatment equipment and the state of the air deflector is searched, so that whether the filter screen is dirty or not can be quickly known.
Optionally, the air processing device further includes a position sensor, the position sensor is mounted on an air deflector arranged at an air outlet of the air processing device and connected to the controller, and is used for detecting a current state of the air deflector, the position sensor sends detected position information of the air deflector to the controller, and the controller determines, according to a position signal detected by the position sensor, a current state of the air deflector.
It should be noted that: because the air deflector is in a static state and a swinging state to influence the air output of the air conditioner, in order to more clearly and accurately know the current filth blockage condition of the filter screen, the invention establishes a first relation corresponding table when the air deflector is in the static state and a second relation corresponding table when the air deflector is in the swinging state in advance. In order to increase the preset temperature T 'in Table 1'IPMAnd the preset temperature T in Table 2 "IPMThe accuracy of (1) is that the temperature T 'is preset in the table 1'IPMAnd the preset temperature T in Table 2 "IPMAll are mean values obtained after multiple tests.
The running windshield of the fan comprises N windshields, wherein N is larger than or equal to 1, the N windshields correspond to different fan rotating speeds when the air treatment equipment is in different modes, the value range of the fan rotating speed is 350-1000 rpm, and the value range is determined according to the specific configuration of the air conditioner. For example, the range of the fan speed corresponding to the first operating damper N1 is 350rpm to 400rpm, the range of the fan speed corresponding to the second operating damper N2 is 400rpm to 450rpm, the range of the fan speed corresponding to the third operating damper N3 is 450rpm to 500rpm, and so on.
In the control design stage of the fan, a first relation corresponding table between the filthy blockage state of the filter screen and the preset temperature is obtained through a touch test when the fan is under a preset windshield, the air deflector is in a static state, and the current environment temperature is equal to the preset environment temperature, and the first relation corresponding table is shown in table 1.
TABLE 1 first relationship correspondence table
In the control design stage of the fan, a second relation corresponding table between the filth blockage state of the filter screen and the preset temperature is obtained through a touch test when the fan is at the preset rotating speed, the air deflector is in a swing state, and the current environment temperature is equal to the preset environment temperature, as shown in table 2.
TABLE 2 second relationship correspondence table
Of course, the value range of the fan rotation speed corresponding to the first operating damper N1 may also be 350rpm to 450rpm, the value range of the fan rotation speed corresponding to the second operating damper N2 may also be 450rpm to 550rpm, the value range of the fan rotation speed corresponding to the third operating damper N3 may also be 550rpm to 650rpm, and the like.
Optionally: the above comparing the current temperature with the preset temperature of the intelligent power module further includes: if the current temperature is higher than the preset temperature, recording the acquisition time t for acquiring the current temperature of the intelligent power module1Comparing the acquisition time t1And preset acquisition time t'1If the time t is obtained1Is greater than or equal to preset acquisition time t'1And returning to obtain the current temperature T of the intelligent power moduleIPM(i) In that respect The storage device is also used for storingStorage preset obtaining time t'1The timing device is further used for recording the acquisition time t for acquiring the current temperature of the intelligent power module1. The preset acquisition time t'1Shows that the air conditioning processing equipment acquires the current temperature T of the intelligent power moduleIPM(i) Through the steps, the current temperature T of the intelligent power module is detected in real timeIPM(i) The filth blockage condition of the filter screen at the air inlet of the air conditioning treatment equipment can be known in time, so that the condition that the filter screen filth blockage false alarm and missing alarm occur in the air conditioning treatment equipment is avoided.
Further, an embodiment of the present invention further provides a device for detecting filth blockage of a filter screen, which is applied to an air processing device, wherein the air processing device includes an intelligent power module, and the device for detecting filth blockage of a filter screen includes: the temperature detection device is used for detecting the current temperature of the intelligent power module; the storage device is used for storing the preset temperature of the intelligent power module; the controller, temperature-detecting device and storage device are all connected with the controller electricity, and the controller judges whether dirty stifled takes place for the filter screen of installing in air handling equipment air intake department according to the temperature-detecting device detects the present temperature of intelligent power module and the preset temperature of storage in the storage device.
Compared with the prior art, the filter screen filth blockage detection device provided by the embodiment of the invention comprises a temperature detection device, wherein the temperature detection device feeds the detected current temperature of the intelligent power module back to the controller, the controller compares the feedback information with the preset temperature stored in the storage device after receiving the feedback information, and judges whether filth blockage exists in the filter screen at the air inlet of the air treatment equipment; if the current temperature of the intelligent power module is higher than the preset temperature of the intelligent power module, the current of the fan is larger, the current load of the fan is larger, the air inlet volume of the air treatment equipment is larger, namely, the filter screen at the air inlet of the air treatment equipment is not dirty and blocked, so that the current change caused by the dirty and blocked filter screen can be truly reflected by detecting the temperature change of the intelligent power module, the detection reliability is higher, the detection result of the temperature detection is directly fed back to the controller, reconstruction is not needed through a driving algorithm, the time spent in the detection process is shorter, and the detection efficiency of the dirty and blocked filter screen detection is improved.
Further, the filter screen filth blockage detection device further comprises: the timing device is used for recording the running time of the air processing equipment, the timing device is electrically connected with the controller, the timing device feeds the recorded running time of the air processing equipment back to the controller, the controller learns the running time of the air processing equipment by acquiring time information recorded by the timing device and sends a corresponding action instruction, for example, when the timing device detects that the running time of the air conditioning system is more than 30min, a working instruction for acquiring the current temperature of the intelligent power module is sent, and after the temperature detection device receives the working instruction, the current temperature of the intelligent power module is acquired, and the air conditioning system runs for 30min, the air processing equipment works in a steady state, so that the accuracy of the acquired current temperature of the intelligent power module is higher.
Of course, the timing device may also issue an operation instruction to obtain the current temperature of the intelligent power module when detecting that the operation time of the air conditioning system is greater than 40 min. The embodiment of the invention does not specifically limit the time, and only needs to ensure that the current temperature of the intelligent power module is obtained after the operation of the air treatment equipment reaches a steady state, wherein the timing device can be any one of an electromagnetic dotting timer, an electric spark timer, a insist timer, a reaction timer and an amplification timer.
In addition, in consideration of the influence of the ambient temperature of the main control board in the air processing device on the temperature of the intelligent power module, in order to ensure the accuracy of the acquired temperature of the intelligent power module, the filter screen filth blockage detection device in the embodiment of the present invention further includes: the environment temperature detection device is used for detecting the current environment temperature of the main control panel of the air conditioner, the environment temperature detection device is electrically connected with the controller, and the storage device is also used for storing the preset environment temperature; the controller includes: and the processing module adjusts the current temperature of the intelligent power module according to the ambient temperature detected by the ambient temperature detection device and the preset ambient temperature stored in the storage device.
It should be noted that: the temperature detection device is installed on the intelligent power module and used for detecting the temperature of the intelligent power module. The environment temperature detection device is arranged on a main control board of the air treatment equipment and used for detecting the environment temperature of the main control board of the air treatment equipment in a shell of the air treatment equipment. The temperature detection device and the ambient temperature detection device may be any one selected from a thermocouple sensor, a thermistor sensor, a resistance temperature detector, and an IC temperature sensor.
Optionally, a motor driving program in the blower according to an embodiment of the present invention is integrated in a main control board of the air processing device, that is, a control module specially used for controlling the motor is disposed in the main control board, and compared with the case where the motor driving program is disposed in a controller embedded in the motor, in the embodiment of the present invention, a controller is not required to be embedded in the motor, and a control signal sent by the main control board is not required to be transmitted to the controller, and the controller controls the motor to perform a corresponding action, so that costs of the motor and the air processing device are reduced, and detection efficiency of dirty and blocked detection of the filter screen is improved. In addition, the real-time state parameters of the motor are directly fed back to the control module in the main control board, so that the real-time state of the motor can be directly reflected, and meanwhile, the dirty and blocked state of the filter screen in the air treatment equipment can be truly reflected according to the real-time state of the motor, so that the detection precision of the dirty and blocked detection of the filter screen is further improved.
Further, air outlet department of air treatment equipment is provided with the aviation baffle, and the filthy stifled detection device of filter screen still includes: the acquisition device is used for acquiring the current running windshield of the fan and is electrically connected with the controller; the storage device is also used for storing a first relation corresponding table between the preset environment temperature and the preset temperature when the fan is under different running windshields and the air deflector is in a static state; and storing a second relation corresponding table between the preset ambient temperature and the preset temperature when the fan is under different running windscreens and the air deflector is in a swing state. The controller obtains the current rotating speed of the fan through the obtaining device so as to know the current running windshield of the fan, and meanwhile, the controller judges whether the preset temperature of the intelligent power module is searched in the first relation corresponding table or the second relation corresponding table through the judging device so as to know the current state of the air deflector.
Based on the above embodiments, the above-described storage means, processing means, and timing means may be integrated with the controller. The storage device, the processing device and the timing device can also be arranged independently, wherein the storage device, the processing device and the timing device are all electrically connected with the controller to realize signal communication. The air treatment equipment comprises an air conditioner, an air purifier, a dehumidifier and the like, and is suitable for both an indoor unit and an outdoor unit of the air conditioner.
On the other hand, the embodiment of the invention also provides an air conditioner which comprises the filter screen filth blockage detection device.
Because the filter screen filth blockage detection device used in the air conditioner of the embodiment of the invention is the same as the filter screen filth blockage detection devices provided in the embodiments, the two devices can solve the same technical problem and achieve the same expected effect.
In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A filter screen filth blockage detection method is characterized by being applied to air treatment equipment and comprising the following steps:
acquiring the current temperature of an intelligent power module in the air treatment equipment;
and comparing the current temperature with the preset temperature of the intelligent power module, and if the current temperature is less than or equal to the preset temperature, determining that the filter screen is dirty and blocked.
2. The filter screen fouling detection method of claim 1, wherein before said obtaining the current temperature of the smart power module in the air treatment device, further comprising:
acquiring the running time of the air treatment equipment;
comparing the running time with a preset running time;
and if the running time is greater than or equal to the preset running time, executing the step of acquiring the current temperature of the intelligent power module in the air treatment equipment.
3. The method for detecting filth clogging of a filter screen according to claim 2, further comprising, after the operating time is greater than or equal to the preset operating time:
acquiring the current ambient temperature of a main control panel of the air treatment equipment;
comparing the current ambient temperature with a preset ambient temperature;
and if the current environment temperature is not equal to the preset environment temperature, adjusting the current temperature.
4. The method for detecting filth blockage of a filter screen according to claim 3, wherein if the current ambient temperature is not equal to the preset ambient temperature, the adjusting the current temperature specifically comprises:
if the current environment temperature is not equal to the preset environment temperature, calculating a difference value delta T of subtracting the preset environment temperature from the current environment temperature;
if the difference value delta T is more than 0 ℃, the current temperature TIPM(i) Satisfies the following conditions: t isIPM(i)＝TIPM(i-1)+ΔT；
If the difference value delta T is less than 0 ℃, the current temperature T isIPM(i) Satisfies the following conditions: t isIPM(i)＝TIPM(i-1)-|ΔT|。
5. The filter screen filth blockage detection method according to claim 3, wherein an air deflector is arranged at an air outlet of the air treatment device, and before the comparison between the current temperature and the preset temperature of the intelligent power module, the method further comprises:
pre-establishing a first relation corresponding table between the preset environment temperature and the preset temperature when the fan is under different operating windscreens and the air deflector is in a static state;
pre-establishing a second relation corresponding table between the preset environment temperature and the preset temperature when the fan is under different running windscreens and the air deflector is in a swing state;
acquiring a current running windshield of the fan;
judging the current state of the air deflector;
if the air deflector is in a static state and the current environment temperature is equal to the preset environment temperature, searching the corresponding preset temperature in the first relation corresponding table according to the current running windshield;
and if the air deflector is in a swinging state and the current environment temperature is equal to the preset environment temperature, searching the preset temperature corresponding to the air deflector in the second relation corresponding table according to the current running windshield.
6. The utility model provides a filth stifled detection device of filter screen which characterized in that is applied to air treatment equipment, air treatment equipment includes intelligent power module, filth stifled detection device of filter screen includes:
the temperature detection device is used for detecting the current temperature of the intelligent power module;
the storage device is used for storing the preset temperature of the intelligent power module;
the controller, temperature-detecting device with storage device with the equal electricity of controller is connected, the controller basis temperature-detecting device detects intelligent power module current temperature with the temperature of predetermineeing in the storage device is saved, judges to be installed whether dirty stifled takes place for the filter screen of air handling equipment air intake department.
7. The filter screen filth blockage detection device according to claim 6, further comprising:
a timing device for recording an operating time of the air treatment device, the timing device being electrically connected to the controller.
8. The filter screen filth blockage detection device according to claim 7, further comprising:
the environment temperature detection device is used for detecting the current environment temperature of a main control panel of the air treatment equipment, the environment temperature detection device is electrically connected with the controller, and the storage device is also used for storing the preset environment temperature;
the controller includes:
and the processing module adjusts the current temperature of the intelligent power module according to the ambient temperature detected by the ambient temperature detection device and the preset ambient temperature stored in the storage device.
9. The filter screen filth blockage detection device according to claim 8, wherein an air deflector is arranged at an air outlet of the air treatment equipment, and the filter screen filth blockage detection device further comprises:
the acquisition device is used for acquiring the current running windshield of the fan and is electrically connected with the controller;
the storage device is used for storing a first relation corresponding table between the preset environment temperature and the preset temperature when the fan is in different running windshields and the air deflector is in a static state; and storing a second relation corresponding table between the preset environment temperature and the preset temperature when the fan is under different running windscreens and the air deflector is in a swing state.
10. An air conditioner characterized by comprising the filter screen filth blockage detection device according to any one of claims 6 to 9.
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