WO2017215090A1 - Operation fault determination method for air conditioner in remote control manner - Google Patents

Operation fault determination method for air conditioner in remote control manner Download PDF

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Publication number
WO2017215090A1
WO2017215090A1 PCT/CN2016/092841 CN2016092841W WO2017215090A1 WO 2017215090 A1 WO2017215090 A1 WO 2017215090A1 CN 2016092841 W CN2016092841 W CN 2016092841W WO 2017215090 A1 WO2017215090 A1 WO 2017215090A1
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Prior art keywords
temperature
indoor
outdoor
air
refrigerant
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PCT/CN2016/092841
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French (fr)
Chinese (zh)
Inventor
徐言生
邹时智
傅仁毅
罗恒
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顺德职业技术学院
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Publication of WO2017215090A1 publication Critical patent/WO2017215090A1/en

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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
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • F24F11/56—Remote control
    • F24F11/58—Remote control using Internet communication
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F24F2110/12—Temperature of the outside air
    • 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

Definitions

  • the invention relates to a method for judging the operation failure of a remote control of an air conditioner.
  • the current problem is that the accuracy of the fault diagnosis system built by the air conditioner manufacturer in the air conditioner is not high; in addition, since the air conditioner fault is mostly a comprehensive fault, the accuracy of the judgment is not high.
  • the air conditioner refrigerant leakage fault is judged as an example, it is generally judged whether the indoor unit coil temperature can reach the specified value within a few minutes after starting up, taking into account the operating parameters of the air conditioner and the indoor temperature and outdoor ambient temperature of the air conditioner. A number of factors are related.
  • the phenomenon of refrigerant leakage is generally 20-30% as the fault judgment standard, so that the air conditioning refrigeration and heating performance have been greatly reduced, and the air conditioner energy consumption will increase by more than 30%.
  • the object of the present invention is to overcome the deficiencies of the prior art and provide a method for judging the operation fault of the air conditioner remote control, which can leak the refrigerant, the heat exchanger of the outdoor unit is dirty, the capacitance of the outdoor unit fan is attenuated, the indoor filter net is dirty and indoor
  • the machine fan is attenuated by five kinds of faults to judge.
  • the user and maintenance personnel can know the operating parameters of the air conditioner at any time through the Internet technology.
  • the maintenance personnel can remotely control the air conditioner through the Internet technology. By changing the operating state of the air conditioner, the fault is judged twice. , accurately find faults early.
  • the present invention is achieved by the present invention, which is an air conditioner remote control operation failure judging method, characterized in that the air conditioner comprises a compressor, an outdoor unit fan, an outdoor heat exchanger, a throttling device, and an indoor heat exchange.
  • indoor filter, indoor fan, control system indoor heat exchanger inlet temperature sensor, indoor heat exchanger outlet temperature sensor, indoor return air temperature sensor, ie room temperature sensor, indoor air temperature sensor, outdoor unit heat exchange Inlet temperature sensor, outdoor heat exchanger outlet temperature sensor, outdoor inlet air temperature sensor, ie, ambient temperature sensor, outdoor air temperature sensor, and four-way valve for cooling and heating operation conversion; the indoor heat exchanger
  • the inlet temperature sensor detects the first indoor refrigerant temperature T1 of the indoor heat exchanger inlet
  • the indoor heat exchanger outlet temperature sensor detects the second indoor refrigerant temperature T2 of the indoor heat exchanger outlet
  • the indoor return air temperature sensor is also the room temperature sensor Detecting indoor heat exchanger
  • the air side inlet air temperature is the indoor temperature T3, the indoor air temperature sensor detects the indoor air side outlet air temperature T4, and the outdoor unit heat exchanger inlet temperature sensor detects the first outdoor refrigerant at the outdoor heat exchanger inlet.
  • the outdoor unit heat exchanger outlet temperature sensor detects the second outdoor refrigerant temperature T6 at the outdoor heat exchanger outlet
  • the outdoor inlet air temperature sensor that is, the ambient temperature sensor detects the outdoor ambient temperature T7
  • the outdoor air temperature sensor detects the outdoor change
  • the outdoor air side air outlet temperature T8 of the heat device is judged as follows:
  • the air temperature is obtained during the cooling and heating operation of the air conditioner under different indoor temperature T3, different outdoor environmental temperature T7, and indoor air blower at high and low air volumes.
  • the control system of the remote control air conditioner has the fault detection alarm function of the conventional air conditioner during operation, and the control system performs an accurate operation fault judgment on the air conditioner every time the air conditioner is operated for a long time, and the precise operation fault judgment starts, the control
  • the system automatically adjusts the air volume of the indoor unit fan to a high air volume state; the control system obtains the first indoor refrigerant temperature T1, the second indoor refrigerant temperature T2, the indoor temperature T3, the indoor air side outlet temperature T4, and the first air conditioner.
  • the control system compares the obtained temperature data with the built-in experimental data of the air conditioner and initially determines, The possible faults are transmitted to the maintenance personnel through the wireless network in time.
  • the maintenance personnel remotely control the air conditioner to change the operation mode according to the uploaded data and possible faults, obtain new operation data, perform second judgment, and cool the refrigeration air conditioner.
  • the heating operation is judged separately;
  • the injection quantity is 95% of the standard filling amount and the refrigerant inlet and outlet temperature difference ⁇ T11 of the indoor unit heat exchanger corresponding to the indoor unit fan is located at the high level, for example, ⁇ T1 ⁇ ⁇ T11, the control system initially determines the refrigerant leakage, Otherwise, it indicates that the refrigerant leakage has not reached the failure standard, and maintenance may not be considered;
  • the system changes the air volume of the indoor unit fan, switches the air volume from the high level to the low level, and obtains the data of the refrigerant inlet and outlet temperature difference ⁇ T1d of the indoor unit heat exchanger when the low air volume is obtained, and then the room temperature T3 and the refrigerant charge amount are standard charging.
  • the air volume of the indoor unit heat exchanger is 95%, and the refrigerant inlet and outlet temperature difference ⁇ T12 of the indoor unit heat exchanger corresponding to the low temperature is compared. If ⁇ T1d ⁇ ⁇ T12, the refrigerant leakage of the air conditioner is judged, otherwise the refrigerant leakage is not reached. Failure standard, regardless of maintenance;
  • the experimental temperature difference ⁇ T21 of the indoor unit air inlet and outlet under the ambient temperature T7 is compared.
  • the maintenance personnel remote control and control system changes the air volume of the indoor unit fan, switches the air volume from the high level to the low level, and obtains the measured temperature difference ⁇ T2d of the indoor unit air inlet and outlet when the low air volume is obtained.
  • the control system detects the indoor temperature T3, the outdoor ambient temperature T7, the first outdoor refrigerant temperature T5, and the second outdoor refrigerant temperature T6, and detects the detected first outdoor refrigerant temperature T5 and the second outdoor refrigerant temperature T6
  • the first outdoor refrigerant temperature T5 and the second outdoor refrigerant temperature T6 obtained at the indoor temperature T3 and the outdoor ambient temperature T7 are compared, and if the actual values of T5 and T6 are greater than the corresponding experimental value of 2 ° C or more, then Preliminary judgment of the outdoor unit dirty or outdoor fan capacitor attenuation failure;
  • the temperature difference ⁇ T31 of the outdoor unit air inlet and outlet at ambient temperature T7 is compared, for example, ⁇ T3- ⁇ T31 ⁇ 2°C, it can be judged that the outdoor unit fan capacitance is attenuated, otherwise it is judged that the outdoor unit is dirty;
  • the control system detects the indoor temperature T3, the outdoor ambient temperature T7, the second indoor refrigerant temperature T2, and the first indoor refrigeration
  • the agent temperature T1 the detected second indoor refrigerant temperature T2 and the first indoor refrigerant temperature T1 and the second indoor temperature T3, the outdoor ambient temperature T7, and the refrigerant charge amount are 95% of the standard charge amount
  • the indoor refrigerant temperature T2 is compared with the first indoor refrigerant temperature T1. If the actual values of T2 and T1 are less than the corresponding experimental values, the refrigerant leakage fault is initially determined;
  • the maintenance personnel remote control and control system changes the air volume of the indoor unit fan, switches the air volume from the high level to the low level, and obtains the low air volume when the indoor unit heat exchanger
  • the second indoor refrigerant temperature T2 and the first indoor refrigerant temperature T1, the detected second indoor refrigerant temperature T2 and the first indoor refrigerant temperature T1 and the indoor temperature T3, the outdoor ambient temperature T7, and the refrigerant charge The amount of the two indoor refrigerant temperature T2 at a standard charge of 95% is compared with the first indoor refrigerant temperature T1. If the actual values of T2 and T1 are less than the corresponding experimental values, the air conditioner refrigerant leakage is judged, otherwise It indicates that the refrigerant leakage has not reached the failure standard and may not be considered for maintenance;
  • the temperature difference ⁇ T21 of the indoor air outlet and the inlet of the indoor unit at temperature T7 is compared.
  • the maintenance personnel remote control and control system changes the air volume of the indoor unit fan, switches the air volume from high to low, and obtains the measured temperature difference ⁇ T2d of the indoor air outlet and inlet when the low air volume is obtained.
  • the control system detects the indoor temperature T3, the outdoor ambient temperature T7, the first outdoor refrigerant temperature T5, and the second outdoor refrigerant temperature T6, and detects the detected second outdoor refrigerant temperature T6 and the first outdoor refrigerant temperature T5
  • the first outdoor refrigerant temperature T5 and the second outdoor refrigerant temperature T6 obtained at the indoor temperature T3 and the outdoor ambient temperature T7 are compared, and the actual values of T5 and T6 are both lower than the corresponding experimental value by 2 ° C or more. Then initially determine whether the outdoor unit is dirty or the outdoor fan capacitance is attenuated;
  • the invention has the following advantages:
  • FIG. 1 is a schematic structural view of a system for cooling operation of a cold and warm air conditioner according to an embodiment of the present invention
  • FIG. 2 is a schematic structural view of a system for heating and running of a cold and warm air conditioner according to an embodiment of the present invention.
  • the remote control air conditioner includes a compressor 1, an outdoor unit fan 2, an outdoor heat exchanger 3, a throttling device 4, and indoor heat exchange. 5, indoor filter 6, indoor fan 7, control system 8, indoor heat exchanger inlet temperature sensor 9, indoor heat exchanger outlet temperature sensor 10, indoor return air temperature sensor, that is, room temperature sensor 11, indoor air outlet Temperature sensor 12, outdoor unit heat exchanger inlet temperature sensor 13, outdoor unit heat exchanger outlet temperature sensor 14, outdoor air inlet temperature sensor, that is, ambient temperature sensor 15, outdoor air temperature sensor 16, and for cooling and heating operation
  • the converted four-way valve 17; the outdoor heat exchanger 3, the throttling device 4 and the indoor heat exchanger 5 are connected in series, and the first interface a of the four-way valve 17 communicates with the inlet of the outdoor heat exchanger 3,
  • the outlet b of the four-way valve 17 communicates with the return port of the compressor 1, the inlet of the four-way valve 17 communicates with the exhaust port of the compressor 1, and the second port c
  • the outdoor unit heat exchanger outlet temperature sensor 14 detecting the second outdoor refrigerant temperature T6 at the outlet of the outdoor heat exchanger 3, and the outdoor inlet air temperature sensor is also the environment
  • the temperature sensor 15 detects the outdoor ambient temperature T7
  • the outdoor outgoing air temperature sensor 16 detects the outdoor air side outgoing air temperature T8 of the outdoor heat exchanger 3, and the control system 8 operation failure is determined as follows:
  • the remote control air conditioner control system 8 has the function of detecting and alarming the failure of the conventional air conditioner, and the air conditioner is operated for a period of time, usually for five days to ten days, and the control system 8 performs an accurate time on the air conditioner. Operation failure judgment, when the precise operation failure judgment starts, the control system 8 automatically adjusts the air volume of the indoor unit fan 7 to a high air volume state; the control system 8 acquires the first indoor refrigerant temperature T1 and the second indoor refrigerant temperature T2 in the air conditioner.
  • the temperature data of the indoor temperature T3, the indoor air side air outlet temperature T4, the first outdoor refrigerant temperature T5, the second outdoor refrigerant temperature T6, the outdoor ambient temperature T7, and the outdoor air side outgoing air temperature T8, the control system 8 will obtain The temperature data is compared with the built-in experimental data of the air conditioner and preliminary judgment, and the possible failures are transmitted to the maintenance personnel through the wireless network in time, and the maintenance personnel remotely control the air conditioner to change the operation mode according to the uploaded data and possible failures. Obtain new operational data, make a second judgment, separate cooling and heating operation for the refrigeration air conditioner Break;
  • the inlet of the four-way valve 17 is in communication with the first port a of the four-way valve 17, and the outlet b of the four-way valve 17 is in communication with the second port c of the four-way valve 9.
  • the injection amount is 95% of the standard charge amount and the refrigerant inlet and outlet temperature difference ⁇ T11 of the indoor unit heat exchanger 5 corresponding to the indoor unit fan 7 is located at a high-grade position, for example, ⁇ T1 ⁇ ⁇ T11, the control system preliminarily judges the refrigerant Leakage, otherwise it indicates that the refrigerant leakage does not meet the failure standard, and maintenance is not considered;
  • the maintenance personnel remote control control system 8 changes the air volume of the indoor unit fan 7, switches the air volume from the high level to the low level, and acquires the low air volume when the indoor unit heat exchanger 5
  • the temperature difference between the inlet and outlet is ⁇ T12. If ⁇ T1d ⁇ T12, the air conditioner refrigerant leakage is judged. Otherwise, the refrigerant leakage does not reach the fault standard. Do not consider maintenance;
  • the maintenance personnel remote control and control system 8 changes the air volume of the indoor unit fan 7, switches the air volume from the high level to the low level, runs for 5 minutes, and obtains the measured air intake of the indoor unit when the low air volume is obtained.
  • the temperature difference ⁇ T2d compares the measured measured temperature difference ⁇ T2d with the experimental temperature difference ⁇ T22 of the indoor unit air inlet and outlet at the indoor temperature T3 and the outdoor ambient temperature T7 experimentally obtained in the control system 8, such as 0.9 ⁇ low-range air volume temperature difference ratio k2/
  • the control system 8 detects the indoor temperature T3, the outdoor ambient temperature T7, the first outdoor refrigerant temperature T5, and the second outdoor refrigerant temperature T6, and detects the obtained first outdoor refrigerant temperature T5 and the second outdoor refrigerant temperature T6. Comparing with the first outdoor refrigerant temperature T5 and the second outdoor refrigerant temperature T6 obtained at the indoor temperature T3 and the outdoor ambient temperature T7, if the actual values of T5 and T6 are greater than the corresponding experimental value of 2 ° C or more, Then preliminary judgment of the outdoor unit 3 dirty or outdoor fan 2 capacitance attenuation failure;
  • the outdoor unit air inlet and outlet temperature difference ⁇ T31 under the outdoor ambient temperature T7 such as ⁇ T3- ⁇ T31 ⁇ 2 ° C, can be judged as the outdoor unit fan 2 capacitance attenuation failure, otherwise it is determined that the outdoor unit 3 is dirty;
  • the inlet of the four-way valve 17 communicates with the second interface c of the four-way valve 17, and the first interface a of the four-way valve 17 communicates with the outlet b of the four-way valve 17;
  • the control system 8 detects the indoor temperature T3, the outdoor ambient temperature T7, the second indoor refrigerant temperature T2, and the first indoor refrigerant temperature T1, and detects the obtained second indoor refrigerant temperature T2 and the first indoor refrigerant temperature T1. And the second indoor refrigerant temperature T2 at the indoor temperature T3, the outdoor ambient temperature T7, and the refrigerant charge amount being 95% of the standard charge amount; The first indoor refrigerant temperature T1 is compared, and if the actual values of T2 and T1 are less than the corresponding experimental values, the refrigerant leakage fault is initially determined;
  • the maintenance personnel remote control and control system 8 changes the air volume of the indoor unit fan 7, switches the air volume from the high level to the low level, and obtains the low temperature air volume when the indoor unit heat exchange
  • the second indoor refrigerant temperature T2 and the first indoor refrigerant temperature T1 of the device 5 the detected second indoor refrigerant temperature T2 and the first indoor refrigerant temperature T1 and the indoor temperature T3, the outdoor ambient temperature T7, and the cooling
  • the charge amount of the agent is the second indoor refrigerant temperature T2 at a standard charge of 95% and the first indoor refrigerant temperature T1. If the actual value is less than the corresponding experimental value, the air conditioner refrigerant leak is judged. Otherwise, it indicates that the refrigerant leakage has not reached the failure standard, and maintenance may not be considered;
  • the indoor temperature T3 and the outdoor ambient temperature T7 are compared with the experimental temperature difference ⁇ T21 of the indoor unit air inlet and the inlet.
  • the maintenance personnel remote control and control system 8 changes the air volume of the indoor unit fan 7, switches the air volume from the high level to the low level, and obtains the measured temperature difference ⁇ T2d of the indoor air outlet and the inlet when the low air volume is obtained.
  • the measured temperature difference ⁇ T2d is compared with the experimental temperature difference ⁇ T22 of the indoor air outlet and the inlet at the indoor temperature T3 and the outdoor ambient temperature T7 obtained by the control system 8, such as 0.9 ⁇ low air volume temperature difference ratio k2 / high grade
  • the air volume temperature difference ratio k1 ⁇ 11, wherein the low air volume temperature difference ratio k2 the measured temperature difference ⁇ T2d / the experimental temperature difference ⁇ T22, can be judged that the filter 6 is dirty, if not in this range, it can be determined that the indoor unit fan 7 capacitance is attenuated;
  • the control system 8 detects the indoor temperature T3, the outdoor ambient temperature T7, the first outdoor refrigerant temperature T5, and the second outdoor refrigerant temperature T6, and detects the obtained second outdoor refrigerant temperature T6 and the first outdoor refrigerant temperature T5.
  • the actual values of T5 and T6 are both lower than the corresponding experimental values by 2 ° C or more. , preliminary judgment of the outdoor unit 3 dirty or outdoor fan 2 capacitor attenuation failure;

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Abstract

An operation fault determination method for an air conditioner in a remote control manner, characterised in that fault determination is: by means of experiments, when a refrigerant of an air conditioner is of a standard charging amount or 95% of the standard charging amount, under different indoor temperatures T3, different outdoor environment temperatures T7 and high and low air volumes of an indoor unit fan (7), during refrigeration and heating operations of the air conditioner, data of first and second indoor refrigerant temperatures T1 and T2, an indoor airside air outlet temperature T4, first and second outdoor refrigerant temperatures T5 and T6 and outdoor airside air outlet temperature T8 is obtained. A control system (8) automatically adjusts the air volume of the indoor unit fan (7) to be in a high air volume state at every period of operation. The control system (8) compares the obtained data with a built-in experiment database, performs preliminary determination, and transmits, in time, a fault which may occur to maintenance personnel via a wireless network, and the maintenance personnel changes an operation mode according to uploaded data in a remote control manner, acquires new operation data, and performs secondary determination on the refrigeration and heating operations of the air conditioner. The advantages of the present invention are that a fault of an air conditioner is determined earlier, the use requirement of a user is better met, energy-saving operation of the air conditioner is achieved, etc.

Description

空调器远程控制运行故障判断方法Air conditioner remote control operation fault judgment method 技术领域Technical field
本发明涉及一种空调器远程控制运行故障判断方法。The invention relates to a method for judging the operation failure of a remote control of an air conditioner.
背景技术Background technique
我国居民和公共场所空调器的普及率已非常高，与此带来的空调器的故障也越来越多。虽然一般空调器都设有常规故障检测并通过故障代码显示告知使用者，但绝大多数使用者对故障代码所代表的故障原因不了解，故障原因不能及时排除，给用户使用带来诸多问题。针对上述问题，有些空调器生产企业开发了基于互联网技术的远程控制空调器，通过互联网技术，空调器故障能及时反馈给用户和维修人员，在维修人员的指导下，用户可以自行解决简单故障，提高了维修效率。但目前存在的问题是空调器厂家在空调器中内置的故障诊断系统判断的精确度不高；另外，由于空调器故障多是综合故障，判断的准确度不高。如以空调器制冷剂泄漏故障判断为例，一般以开机后几分钟室内机盘管温度能否达到规定值作为判断依据，考虑到空调器运行参数与空调器所处室内温度及室外环境温度等诸多因素有关，为减少误判，一般是以制冷剂泄漏20-30％呈现的现象作为故障判断标准，这样空调器制冷、制热性能已下降很多，空调器能耗会增加30％以上。The popularity of air conditioners in residents and public places in China has been very high, and the failure of air conditioners has also increased. Although the general air conditioner has regular fault detection and informs the user through the fault code display, most users do not understand the cause of the fault represented by the fault code, and the fault reason cannot be eliminated in time, which brings many problems to the user. In response to the above problems, some air conditioner manufacturers have developed remote control air conditioners based on Internet technology. Through Internet technology, air conditioner faults can be timely fed back to users and maintenance personnel. Under the guidance of maintenance personnel, users can solve simple faults by themselves. Improve maintenance efficiency. However, the current problem is that the accuracy of the fault diagnosis system built by the air conditioner manufacturer in the air conditioner is not high; in addition, since the air conditioner fault is mostly a comprehensive fault, the accuracy of the judgment is not high. For example, if the air conditioner refrigerant leakage fault is judged as an example, it is generally judged whether the indoor unit coil temperature can reach the specified value within a few minutes after starting up, taking into account the operating parameters of the air conditioner and the indoor temperature and outdoor ambient temperature of the air conditioner. A number of factors are related. In order to reduce misjudgment, the phenomenon of refrigerant leakage is generally 20-30% as the fault judgment standard, so that the air conditioning refrigeration and heating performance have been greatly reduced, and the air conditioner energy consumption will increase by more than 30%.
发明内容Summary of the invention
本发明的目的是克服现有技术的不足而提供一种空调器远程控制运行故障判断方法，能对制冷剂泄漏、室外机换热器脏、室外机风机电容衰减、室内机过滤网脏及室内机风机电容衰减五种故障进行判断，用户和维修人员通过互联网技术随时了解空调器运行参数，维修人员可通过互联网技术对空调器进行远程控制，通过改变空调器运行状态，对故障进行二次判断，及早准确发现故障。The object of the present invention is to overcome the deficiencies of the prior art and provide a method for judging the operation fault of the air conditioner remote control, which can leak the refrigerant, the heat exchanger of the outdoor unit is dirty, the capacitance of the outdoor unit fan is attenuated, the indoor filter net is dirty and indoor The machine fan is attenuated by five kinds of faults to judge. The user and maintenance personnel can know the operating parameters of the air conditioner at any time through the Internet technology. The maintenance personnel can remotely control the air conditioner through the Internet technology. By changing the operating state of the air conditioner, the fault is judged twice. , accurately find faults early.
为了达到上述目的，本发明是这样实现的，其是一种空调器远程控制运行故障判断方法，其特征在于空调器包括压缩机、室外机风机、室外换热器、节流装置、室内换热器、室内过滤器、室内机风机、控制系统、室内换热器入口温度传感器、室内换热器出口温度传感器、室内回风温度传感器也即房间温度传感器、室内出风温度传感器、室外机换热器入口温度传感器、室外机换热器出口温度传感器、室外进风温度传感器也即环境温度传感器、室外出风温度传感器及用于制冷与制热运行转换的四通阀；所述室内换热器入口温度传感器检测室内换热器入口的第一室内制冷剂温度T1，室内换热器出口温度传感器检测室内换热器出口的第二室内制冷剂温度T2，室内回风温度传感器也即房间温度传感器检测室内换热器 的空气侧进风温度即室内温度T3，室内出风温度传感器检测室内换热器的室内空气侧出风温度T4，室外机换热器入口温度传感器检测室外换热器入口的第一室外制冷剂温度T5，室外机换热器出口温度传感器检测室外换热器出口的第二室外制冷剂温度T6，室外进风温度传感器也即环境温度传感器检测室外环境温度T7，室外出风温度传感器检测室外换热器的室外空气侧出风温度T8，控制系统运行故障判断如下：In order to achieve the above object, the present invention is achieved by the present invention, which is an air conditioner remote control operation failure judging method, characterized in that the air conditioner comprises a compressor, an outdoor unit fan, an outdoor heat exchanger, a throttling device, and an indoor heat exchange. , indoor filter, indoor fan, control system, indoor heat exchanger inlet temperature sensor, indoor heat exchanger outlet temperature sensor, indoor return air temperature sensor, ie room temperature sensor, indoor air temperature sensor, outdoor unit heat exchange Inlet temperature sensor, outdoor heat exchanger outlet temperature sensor, outdoor inlet air temperature sensor, ie, ambient temperature sensor, outdoor air temperature sensor, and four-way valve for cooling and heating operation conversion; the indoor heat exchanger The inlet temperature sensor detects the first indoor refrigerant temperature T1 of the indoor heat exchanger inlet, the indoor heat exchanger outlet temperature sensor detects the second indoor refrigerant temperature T2 of the indoor heat exchanger outlet, and the indoor return air temperature sensor is also the room temperature sensor Detecting indoor heat exchanger The air side inlet air temperature is the indoor temperature T3, the indoor air temperature sensor detects the indoor air side outlet air temperature T4, and the outdoor unit heat exchanger inlet temperature sensor detects the first outdoor refrigerant at the outdoor heat exchanger inlet. Temperature T5, the outdoor unit heat exchanger outlet temperature sensor detects the second outdoor refrigerant temperature T6 at the outdoor heat exchanger outlet, the outdoor inlet air temperature sensor, that is, the ambient temperature sensor detects the outdoor ambient temperature T7, and the outdoor air temperature sensor detects the outdoor change The outdoor air side air outlet temperature T8 of the heat device is judged as follows:
(一)通过实验，空调器制冷剂标准充注量时，在不同室内温度T3、不同室外环境温度T7以及室内机风机在高、低两档风量下，空调器制冷、制热运行时，获得第一室内制冷剂温度T1、第二室内制冷剂温度T2、室内空气侧出风温度T4、第一室外制冷剂温度T5、第二室外制冷剂温度T6及室外空气侧出风温度T8的数据；(1) Through experiments, when the standard refrigerant charge of the air conditioner is used, the air temperature is obtained during the cooling and heating operation of the air conditioner under different indoor temperature T3, different outdoor environmental temperature T7, and indoor air blower at high and low air volumes. Data of the first indoor refrigerant temperature T1, the second indoor refrigerant temperature T2, the indoor air side exhaust air temperature T4, the first outdoor refrigerant temperature T5, the second outdoor refrigerant temperature T6, and the outdoor air side outgoing air temperature T8;
(二)通过实验，空调器制冷剂充注量为标准充注量95％时，在不同室内温度T3、不同室外环境温度T7以及室内机风机在高、低两档风量下，空调器制冷、制热运行时，获得第一室内制冷剂温度T1、第二室内制冷剂温度T2、室内空气侧出风温度T4、第一室外制冷剂温度T5、第二室外制冷剂温度T6及室外空气侧出风温度T8的数据；(2) Through experiments, when the refrigerant charge of the air conditioner is 95% of the standard charge, the air conditioner is cooled at different indoor temperature T3, different outdoor ambient temperature T7, and the indoor fan is at the high and low air volumes. During the heating operation, the first indoor refrigerant temperature T1, the second indoor refrigerant temperature T2, the indoor air side outlet air temperature T4, the first outdoor refrigerant temperature T5, the second outdoor refrigerant temperature T6, and the outdoor air side outlet are obtained. Wind temperature T8 data;
(三)远程控制空调器的控制系统具有常规空调器运行时故障检测报警功能，且空调器每累计运行一段时间，控制系统对空调器进行一次精确运行故障判断，精确运行故障判断开始时，控制系统自动将室内机风机的风量调到高风量状态；控制系统获取空调器中第一室内制冷剂温度T1、第二室内制冷剂温度T2、室内温度T3、室内空气侧出风温度T4、第一室外制冷剂温度T5、第二室外制冷剂温度T6、室外环境温度T7及室外空气侧出风温度T8的温度数据，控制系统将获得的温度数据与空调器的内置实验数据进行比较并初步判断，并将可能出现的故障及时通过无线网络传输给维修人员，维修人员根据上传数据及可能出现的故障远程控制空调器改变运行模式，获取新的运行数据，进行二次判断，对制冷空调器制冷、制热运行分别进行判断；(3) The control system of the remote control air conditioner has the fault detection alarm function of the conventional air conditioner during operation, and the control system performs an accurate operation fault judgment on the air conditioner every time the air conditioner is operated for a long time, and the precise operation fault judgment starts, the control The system automatically adjusts the air volume of the indoor unit fan to a high air volume state; the control system obtains the first indoor refrigerant temperature T1, the second indoor refrigerant temperature T2, the indoor temperature T3, the indoor air side outlet temperature T4, and the first air conditioner. The temperature data of the outdoor refrigerant temperature T5, the second outdoor refrigerant temperature T6, the outdoor ambient temperature T7, and the outdoor air side outlet temperature T8, the control system compares the obtained temperature data with the built-in experimental data of the air conditioner and initially determines, The possible faults are transmitted to the maintenance personnel through the wireless network in time. The maintenance personnel remotely control the air conditioner to change the operation mode according to the uploaded data and possible faults, obtain new operation data, perform second judgment, and cool the refrigeration air conditioner. The heating operation is judged separately;
(四)控制系统在空调器制冷运行时五种典型运行故障判断步骤如下：(IV) The following five typical operational failure judgment steps of the control system during air conditioning refrigeration operation are as follows:
(a)制冷剂泄漏(a) refrigerant leakage
1)控制系统检测到室内温度T3及室内机换热器的制冷剂进出口温差ΔT1即ΔT1＝T1-T2，对应此时室内温度T3，将检测得到的温差ΔT1与室内温度T3、制冷剂充注量为标准充注量95％及室内机风机的风量位于高档位时所对应的室内机换热器的制冷剂进出口温差ΔT11进行比较，如ΔT1＜ΔT11，控制系统初步判断制冷剂泄漏，否则表明制冷剂泄漏未达到故障标准，可不考虑维修；1) The control system detects the indoor temperature T3 and the refrigerant inlet and outlet temperature difference ΔT1 of the indoor unit heat exchanger, that is, ΔT1=T1-T2, corresponding to the indoor temperature T3, the detected temperature difference ΔT1 and the indoor temperature T3, the refrigerant charge The injection quantity is 95% of the standard filling amount and the refrigerant inlet and outlet temperature difference ΔT11 of the indoor unit heat exchanger corresponding to the indoor unit fan is located at the high level, for example, ΔT1 < ΔT11, the control system initially determines the refrigerant leakage, Otherwise, it indicates that the refrigerant leakage has not reached the failure standard, and maintenance may not be considered;
2)维修人员获取ΔT1、ΔT11以及ΔT1与ΔT11比较结果数据后，维修人员远程控制控制 系统改变室内机风机的风量，将风量从高档切换到低档，获取低档风量时室内机换热器的制冷剂进出口温差ΔT1d的数据，再与房间温度T3、制冷剂充注量为标准充注量95％、室内机风机的风量位于低档时所对应的室内机换热器的制冷剂进出口温差ΔT12进行比较，如ΔT1d＜ΔT12，则判断空调器制冷剂泄漏，否则表明制冷剂泄漏未达到故障标准，可不考虑维修；2) Maintenance personnel obtain ΔT1, ΔT11 and ΔT1 and ΔT11 comparison result data, maintenance personnel remote control control The system changes the air volume of the indoor unit fan, switches the air volume from the high level to the low level, and obtains the data of the refrigerant inlet and outlet temperature difference ΔT1d of the indoor unit heat exchanger when the low air volume is obtained, and then the room temperature T3 and the refrigerant charge amount are standard charging. The air volume of the indoor unit heat exchanger is 95%, and the refrigerant inlet and outlet temperature difference ΔT12 of the indoor unit heat exchanger corresponding to the low temperature is compared. If ΔT1d < ΔT12, the refrigerant leakage of the air conditioner is judged, otherwise the refrigerant leakage is not reached. Failure standard, regardless of maintenance;
(b)室内机过滤网脏或风机电容衰减(b) Indoor unit filter dirty or fan capacitor attenuation
1)控制系统检测室内温度T3、室外环境温度T7及室内机空气进出口的实测温差ΔT2即ΔT2＝T3-T4，将检测得到的实测温差ΔT2与控制系统中实验得到的在室内温度T3及室外环境温度T7下的室内机空气进出口的实验温差ΔT21进行比较，如高档风量温差比k1≥1.2，其中高档风量温差比k1＝实测温差ΔT2/实验温差ΔT21，则初步判断室内机过滤网脏或风机电容衰减故障；1) The control system detects the indoor temperature T3, the outdoor ambient temperature T7, and the measured temperature difference ΔT2 of the indoor unit air inlet and outlet, that is, ΔT2=T3-T4, and the detected measured temperature difference ΔT2 and the indoor temperature T3 obtained in the control system and the outdoor The experimental temperature difference ΔT21 of the indoor unit air inlet and outlet under the ambient temperature T7 is compared. For example, the high-grade air volume temperature difference ratio k1 ≥ 1.2, wherein the high-grade air volume temperature difference ratio k1 = the measured temperature difference ΔT2 / the experimental temperature difference ΔT21, the initial determination of the indoor unit filter is dirty or Fan capacitor attenuation failure;
2)维修人员获取ΔT2、ΔT21以及k1数据后，维修人员远程控制控制系统改变室内机风机的风量，将风量从高档切换到低档，获取低档风量时室内机空气进出口的实测温差ΔT2d，将检测得到的实测温差ΔT2d与控制系统中实验得到的在室内温度T3、室外环境温度T7下的室内机空气进出口的实验温差ΔT22进行比较，如0.9≤低档风量温差比k2/高档风量温差比k1≤11，其中低档风量温差比k2＝实测温差ΔT2d/实验温差ΔT22，可判断为过滤网脏，如不在此范围，可判断为室内机风机7电容衰减；2) After the maintenance personnel obtain the ΔT2, ΔT21 and k1 data, the maintenance personnel remote control and control system changes the air volume of the indoor unit fan, switches the air volume from the high level to the low level, and obtains the measured temperature difference ΔT2d of the indoor unit air inlet and outlet when the low air volume is obtained. The obtained measured temperature difference ΔT2d is compared with the experimental temperature difference ΔT22 of the indoor air inlet and outlet under the indoor temperature T3 and the outdoor ambient temperature T7 obtained in the control system, such as 0.9 ≤ low air volume temperature difference ratio k2 / high air volume temperature difference ratio k1 ≤ 11, wherein the low-speed air temperature difference ratio k2 = measured temperature difference ΔT2d / experimental temperature difference ΔT22, can be judged as the filter is dirty, if not in this range, it can be judged that the indoor fan 7 capacitance decay;
(c)室外机脏或室外风机电容衰减(c) Outdoor unit dirty or outdoor fan capacitor attenuation
1)控制系统检测室内温度T3、室外环境温度T7、第一室外制冷剂温度T5及第二室外制冷剂温度T6，将检测得到的第一室外制冷剂温度T5及第二室外制冷剂温度T6与实验得到的在室内温度T3、室外环境温度T7下的第一室外制冷剂温度T5及第二室外制冷剂温度T6进行比较，如T5、T6的实际值均大于对应的实验值2℃以上，则初步判断室外机脏或室外风机电容衰减故障；1) The control system detects the indoor temperature T3, the outdoor ambient temperature T7, the first outdoor refrigerant temperature T5, and the second outdoor refrigerant temperature T6, and detects the detected first outdoor refrigerant temperature T5 and the second outdoor refrigerant temperature T6 The first outdoor refrigerant temperature T5 and the second outdoor refrigerant temperature T6 obtained at the indoor temperature T3 and the outdoor ambient temperature T7 are compared, and if the actual values of T5 and T6 are greater than the corresponding experimental value of 2 ° C or more, then Preliminary judgment of the outdoor unit dirty or outdoor fan capacitor attenuation failure;
2)控制系统继续检测室外环境温度T7及室外空气侧出风温度T8，得到实际进出风温差ΔT3即ΔT3＝T8-T7，将检测得到温差ΔT3与控制系统中实验得到的在室内温度T3及室外环境温度T7下的室外机空气进出口温差ΔT31进行比较，如ΔT3-ΔT31≥2℃，可判断为室外机风机电容衰减故障，否则判断为室外机脏；2) The control system continues to detect the outdoor ambient temperature T7 and the outdoor air side exhaust air temperature T8, and obtains the actual inlet and outlet air temperature difference ΔT3, ie ΔT3=T8-T7, and detects the temperature difference ΔT3 and the indoor temperature T3 obtained in the control system and the outdoor The temperature difference ΔT31 of the outdoor unit air inlet and outlet at ambient temperature T7 is compared, for example, ΔT3-ΔT31≥2°C, it can be judged that the outdoor unit fan capacitance is attenuated, otherwise it is judged that the outdoor unit is dirty;
(五)空调器制热运行时的五种典型运行故障判断步骤如下：(5) The five typical operational failure judgment steps of the air conditioner heating operation are as follows:
(a)制冷剂泄漏(a) refrigerant leakage
1)控制系统检测室内温度T3、室外环境温度T7、第二室内制冷剂温度T2及第一室内制冷 剂温度T1，将检测得到的第二室内制冷剂温度T2及第一室内制冷剂温度T1与在室内温度T3、室外环境温度T7、制冷剂充注量为标准充注量95％下的第二室内制冷剂温度T2及第一室内制冷剂温度T1进行比较，如T2、T1的实际值均小于对应的实验值，则初步判断制冷剂泄漏故障；1) The control system detects the indoor temperature T3, the outdoor ambient temperature T7, the second indoor refrigerant temperature T2, and the first indoor refrigeration The agent temperature T1, the detected second indoor refrigerant temperature T2 and the first indoor refrigerant temperature T1 and the second indoor temperature T3, the outdoor ambient temperature T7, and the refrigerant charge amount are 95% of the standard charge amount The indoor refrigerant temperature T2 is compared with the first indoor refrigerant temperature T1. If the actual values of T2 and T1 are less than the corresponding experimental values, the refrigerant leakage fault is initially determined;
2)维修人员获取T2、T1的实际值以及对应的实验值数据后，维修人员远程控制控制系统改变室内机风机的风量，将风量从高档切换到低档，获取低档风量时室内机换热器的第二室内制冷剂温度T2及第一室内制冷剂温度T1，将检测得到的第二室内制冷剂温度T2及第一室内制冷剂温度T1与在室内温度T3、室外环境温度T7、制冷剂充注量为标准充注量95％下的二室内制冷剂温度T2及第一室内制冷剂温度T1进行比较，如T2、T1的实际值均小于对应的实验值，则判断空调器制冷剂泄漏，否则表明制冷剂泄漏未达到故障标准，可不考虑维修；2) After the maintenance personnel obtain the actual values of T2 and T1 and the corresponding experimental value data, the maintenance personnel remote control and control system changes the air volume of the indoor unit fan, switches the air volume from the high level to the low level, and obtains the low air volume when the indoor unit heat exchanger The second indoor refrigerant temperature T2 and the first indoor refrigerant temperature T1, the detected second indoor refrigerant temperature T2 and the first indoor refrigerant temperature T1 and the indoor temperature T3, the outdoor ambient temperature T7, and the refrigerant charge The amount of the two indoor refrigerant temperature T2 at a standard charge of 95% is compared with the first indoor refrigerant temperature T1. If the actual values of T2 and T1 are less than the corresponding experimental values, the air conditioner refrigerant leakage is judged, otherwise It indicates that the refrigerant leakage has not reached the failure standard and may not be considered for maintenance;
(b)室内机过滤网脏或风机电容衰减(b) Indoor unit filter dirty or fan capacitor attenuation
1)控制系统检测室内温度T3、室外环境温度T7及室内机空气出口、进口温差ΔT2即ΔT2＝T4-T3，将检测得到的实测温差ΔT2与控制系统中实验得到的在室内温度T3、室外环境温度T7下的室内机空气出口、进口的实验温差ΔT21进行比较，如高档风量温差比k1≥1.2，其中高档风量温差比k1＝实测温差ΔT2/实验温差ΔT21，则初步判断室内机过滤网脏或风机电容衰减故障；1) The control system detects the indoor temperature T3, the outdoor ambient temperature T7, the indoor air outlet, the inlet temperature difference ΔT2, ie ΔT2=T4-T3, and the measured measured temperature difference ΔT2 and the indoor temperature T3 obtained in the control system, the outdoor environment The temperature difference ΔT21 of the indoor air outlet and the inlet of the indoor unit at temperature T7 is compared. For example, the high-temperature air temperature difference ratio k1≥1.2, wherein the high-grade air volume temperature difference ratio k1=the measured temperature difference ΔT2/the experimental temperature difference ΔT21, the initial determination of the indoor unit filter is dirty or Fan capacitor attenuation failure;
2)维修人员获取ΔT2、ΔT21以及k1数据后，维修人员远程控制控制系统改变室内机风机的风量，将风量从高档切换到低档，获取低档风量时室内机空气出口、进口的实测温差ΔT2d，将检测得到的实测温差ΔT2d与控制系统中实验得到的在室内温度T3、室外环境温度T7下的室内机空气出口、进口的实验温差ΔT22进行比较，如0.9≤低档风量温差比k2/高档风量温差比k1≤11，其中低档风量温差比k2＝实测温差ΔT2d/实验温差ΔT22，可判断为过滤网脏，如不在此范围，可判断为室内机风机7电容衰减；2) After the maintenance personnel obtain the ΔT2, ΔT21 and k1 data, the maintenance personnel remote control and control system changes the air volume of the indoor unit fan, switches the air volume from high to low, and obtains the measured temperature difference ΔT2d of the indoor air outlet and inlet when the low air volume is obtained. The measured measured temperature difference ΔT2d is compared with the experimental temperature difference ΔT22 of the indoor air outlet and the inlet at the indoor temperature T3 and the outdoor ambient temperature T7 obtained in the control system, such as 0.9 ≤ low air volume temperature difference ratio k2 / high air volume temperature difference ratio K1≤11, wherein the low-speed air volume temperature difference ratio k2=the actual temperature difference ΔT2d/the experimental temperature difference ΔT22, can be judged that the filter mesh is dirty, if not in this range, it can be judged that the indoor fan 7 capacitance decay;
(c)室外机脏或室外风机电容衰减(c) Outdoor unit dirty or outdoor fan capacitor attenuation
1)控制系统检测室内温度T3、室外环境温度T7、第一室外制冷剂温度T5及第二室外制冷剂温度T6，将检测得到的第二室外制冷剂温度T6及第一室外制冷剂温度T5与实验得到的在室内温度T3、室外环境温度T7下的第一室外制冷剂温度T5及第二室外制冷剂温度T6进行比较，如T5、T6的实际值均比对应的实验值低2℃以上，则初步判断室外机脏或室外风机电容衰减故障；1) The control system detects the indoor temperature T3, the outdoor ambient temperature T7, the first outdoor refrigerant temperature T5, and the second outdoor refrigerant temperature T6, and detects the detected second outdoor refrigerant temperature T6 and the first outdoor refrigerant temperature T5 The first outdoor refrigerant temperature T5 and the second outdoor refrigerant temperature T6 obtained at the indoor temperature T3 and the outdoor ambient temperature T7 are compared, and the actual values of T5 and T6 are both lower than the corresponding experimental value by 2 ° C or more. Then initially determine whether the outdoor unit is dirty or the outdoor fan capacitance is attenuated;
2)控制系统继续检测室外环境温度T7及室外空气侧出风温度T8，得到实际进出风温差Δ T3即ΔT3＝T7-T8，将检测得到温差ΔT3与控制系统中实验得到的在室内温度T3、室外环境温度T7下的室外机空气进出口温差ΔT31进行比较，如ΔT3-ΔT31≥2℃，可判断为室外机风机电容衰减故障，否则判断为室外机脏。2) The control system continues to detect the outdoor ambient temperature T7 and the outdoor air side outlet temperature T8 to obtain the actual inlet and outlet air temperature difference Δ T3 is ΔT3=T7-T8, and the detected temperature difference ΔT3 is compared with the temperature difference ΔT31 of the outdoor unit air inlet and outlet at the indoor temperature T3 and the outdoor ambient temperature T7 obtained by the control system, such as ΔT3-ΔT31≥2°C. It is judged that the outdoor unit fan capacitance is attenuated, otherwise it is judged that the outdoor unit is dirty.
本发明与现有技术相比，具有如下优点：Compared with the prior art, the invention has the following advantages:
(1)更早的确定空调器故障，更好的满足用户使用要求和实现空调器运行节能；(1) Determine the air conditioner fault earlier, better meet the user's use requirements and realize energy saving of the air conditioner operation;
(2)故障判断简单实用，故障判断准确。(2) The fault judgment is simple and practical, and the fault judgment is accurate.
附图说明DRAWINGS
图1是本发明实施的冷暖型空调器制冷运行时系统结构原理图；1 is a schematic structural view of a system for cooling operation of a cold and warm air conditioner according to an embodiment of the present invention;
图2是本发明实施的冷暖型空调器制热运行时系统结构原理图。2 is a schematic structural view of a system for heating and running of a cold and warm air conditioner according to an embodiment of the present invention.
具体实施方式detailed description
下面详细描述本发明的实施例，所述实施例的示例在附图中示出。下面通过参考附图描述的实施例是示例性的，仅用于解释本发明，而不能理解为对本发明的限制。Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are intended to be illustrative of the invention and are not to be construed as limiting.
如图1、2所示，其是一种远程控制空调器运行故障判断方法，其远程控制空调器包括压缩机1、室外机风机2、室外换热器3、节流装置4、室内换热器5、室内过滤器6、室内机风机7、控制系统8、室内换热器入口温度传感器9、室内换热器出口温度传感器10、室内回风温度传感器也即房间温度传感器11、室内出风温度传感器12、室外机换热器入口温度传感器13、室外机换热器出口温度传感器14、室外进风温度传感器也即环境温度传感器15、室外出风温度传感器16及用于制冷与制热运行转换的四通阀17；所述室外换热器3、节流装置4及室内换热器5依次串联连通，所述四通阀17的第一接口a与室外换热器3的入口连通，四通阀17的出口b与压缩机1的回气口连通，四通阀17的入口与压缩机1的排气口连通，四通阀17的第二接口c与室内换热器5的出口连通；所述室内换热器入口温度传感器9检测室内换热器5入口的第一室内制冷剂温度T1，室内换热器出口温度传感器10检测室内换热器5出口的第二室内制冷剂温度T2，室内回风温度传感器也即房间温度传感器11检测室内换热器5的空气侧进风温度即室内温度T3，室内出风温度传感器12检测室内换热器5的室内空气侧出风温度T4，室外机换热器入口温度传感器13检测室外换热器3入口的第一室外制冷剂温度T5，室外机换热器出口温度传感器14检测室外换热器3出口的第二室外制冷剂温度T6，室外进风温度传感器也即环境温度传感器15检测室外环境温度T7，室外出风温度传感器16检测室外换热器3的室外空气侧出风温度T8，控制系统8运行故障判断如下：As shown in Fig. 1 and 2, it is a remote control air conditioner operation failure judging method, and the remote control air conditioner includes a compressor 1, an outdoor unit fan 2, an outdoor heat exchanger 3, a throttling device 4, and indoor heat exchange. 5, indoor filter 6, indoor fan 7, control system 8, indoor heat exchanger inlet temperature sensor 9, indoor heat exchanger outlet temperature sensor 10, indoor return air temperature sensor, that is, room temperature sensor 11, indoor air outlet Temperature sensor 12, outdoor unit heat exchanger inlet temperature sensor 13, outdoor unit heat exchanger outlet temperature sensor 14, outdoor air inlet temperature sensor, that is, ambient temperature sensor 15, outdoor air temperature sensor 16, and for cooling and heating operation The converted four-way valve 17; the outdoor heat exchanger 3, the throttling device 4 and the indoor heat exchanger 5 are connected in series, and the first interface a of the four-way valve 17 communicates with the inlet of the outdoor heat exchanger 3, The outlet b of the four-way valve 17 communicates with the return port of the compressor 1, the inlet of the four-way valve 17 communicates with the exhaust port of the compressor 1, and the second port c of the four-way valve 17 communicates with the outlet of the indoor heat exchanger 5 The indoor heat exchanger inlet The degree sensor 9 detects the first indoor refrigerant temperature T1 at the inlet of the indoor heat exchanger 5, the indoor heat exchanger outlet temperature sensor 10 detects the second indoor refrigerant temperature T2 at the outlet of the indoor heat exchanger 5, and the indoor return air temperature sensor The room temperature sensor 11 detects the air side inlet air temperature of the indoor heat exchanger 5, that is, the indoor temperature T3, and the indoor air temperature sensor 12 detects the indoor air side outlet temperature T4 of the indoor heat exchanger 5, and the outdoor unit heat exchanger inlet temperature sensor. 13 detecting the first outdoor refrigerant temperature T5 at the inlet of the outdoor heat exchanger 3, the outdoor unit heat exchanger outlet temperature sensor 14 detecting the second outdoor refrigerant temperature T6 at the outlet of the outdoor heat exchanger 3, and the outdoor inlet air temperature sensor is also the environment The temperature sensor 15 detects the outdoor ambient temperature T7, and the outdoor outgoing air temperature sensor 16 detects the outdoor air side outgoing air temperature T8 of the outdoor heat exchanger 3, and the control system 8 operation failure is determined as follows:
(一)通过实验，空调器制冷剂标准充注量时，在不同室内温度T3、不同室外环境温度T7 以及室内机风机7在高、低两档风量下，空调器制冷、制热运行时，获得第一室内制冷剂温度T1、第二室内制冷剂温度T2、室内空气侧出风温度T4、第一室外制冷剂温度T5、第二室外制冷剂温度T6及室外空气侧出风温度T8的数据；(1) Through experiments, when the air conditioner refrigerant standard charge amount, in different indoor temperature T3, different outdoor environmental temperature T7 And the indoor unit fan 7 obtains the first indoor refrigerant temperature T1, the second indoor refrigerant temperature T2, the indoor air side outlet air temperature T4, and the first air conditioner cooling and heating operation. Data of outdoor refrigerant temperature T5, second outdoor refrigerant temperature T6, and outdoor air side outlet temperature T8;
(二)通过实验，空调器制冷剂充注量为标准充注量95％时，在不同室内温度T3、不同室外环境温度T7以及室内机风机7在高、低两档风量下，空调器制冷、制热运行时，获得第一室内制冷剂温度T1、第二室内制冷剂温度T2、室内空气侧出风温度T4、第一室外制冷剂温度T5、第二室外制冷剂温度T6及室外空气侧出风温度T8的数据；(2) Through experiments, when the refrigerant charge of the air conditioner is 95% of the standard charge, the air conditioner is cooled at different indoor temperatures T3, different outdoor ambient temperatures T7, and the indoor fan 7 in the high and low air volumes. During the heating operation, the first indoor refrigerant temperature T1, the second indoor refrigerant temperature T2, the indoor air side outlet air temperature T4, the first outdoor refrigerant temperature T5, the second outdoor refrigerant temperature T6, and the outdoor air side are obtained. Data of the outlet temperature T8;
(三)远程控制空调器的控制系统8具有常规空调器运行时故障检测报警功能，且空调器每累计运行一段时间，一段时间一般为五天至十天，控制系统8对空调器进行一次精确运行故障判断，精确运行故障判断开始时，控制系统8自动将室内机风机7的风量调到高风量状态；控制系统8获取空调器中第一室内制冷剂温度T1、第二室内制冷剂温度T2、室内温度T3、室内空气侧出风温度T4、第一室外制冷剂温度T5、第二室外制冷剂温度T6、室外环境温度T7及室外空气侧出风温度T8的温度数据，控制系统8将获得的温度数据与空调器的内置实验数据进行比较并初步判断，，并将可能出现的故障及时通过无线网络传输给维修人员，维修人员根据上传数据及可能出现的故障远程控制空调器改变运行模式，获取新的运行数据，进行二次判断，对制冷空调器分制冷及制热运行分别判断；(3) The remote control air conditioner control system 8 has the function of detecting and alarming the failure of the conventional air conditioner, and the air conditioner is operated for a period of time, usually for five days to ten days, and the control system 8 performs an accurate time on the air conditioner. Operation failure judgment, when the precise operation failure judgment starts, the control system 8 automatically adjusts the air volume of the indoor unit fan 7 to a high air volume state; the control system 8 acquires the first indoor refrigerant temperature T1 and the second indoor refrigerant temperature T2 in the air conditioner. The temperature data of the indoor temperature T3, the indoor air side air outlet temperature T4, the first outdoor refrigerant temperature T5, the second outdoor refrigerant temperature T6, the outdoor ambient temperature T7, and the outdoor air side outgoing air temperature T8, the control system 8 will obtain The temperature data is compared with the built-in experimental data of the air conditioner and preliminary judgment, and the possible failures are transmitted to the maintenance personnel through the wireless network in time, and the maintenance personnel remotely control the air conditioner to change the operation mode according to the uploaded data and possible failures. Obtain new operational data, make a second judgment, separate cooling and heating operation for the refrigeration air conditioner Break;
(四)空调器制冷运行时五种典型运行故障判断步骤如下：(IV) The steps for judging five typical operational faults during air-conditioning refrigeration operation are as follows:
如图1所示，所述四通阀17的入口与四通阀17的第一接口a连通，四通阀17的出口b与四通阀9的第二接口c连通；As shown in FIG. 1, the inlet of the four-way valve 17 is in communication with the first port a of the four-way valve 17, and the outlet b of the four-way valve 17 is in communication with the second port c of the four-way valve 9.
(a)制冷剂泄漏(a) refrigerant leakage
控制系统8检测到室内温度T3及室内机换热器5的制冷剂进出口温差ΔT1即ΔT1＝T1-T2，对应此时室内温度T3，将检测得到的温差ΔT1与室内温度T3、制冷剂充注量为标准充注量95％及室内机风机7的风量位于高档位时所对应的室内机换热器5的制冷剂进出口温差ΔT11进行比较，如ΔT1＜ΔT11，控制系统初步判断制冷剂泄漏，否则表明制冷剂泄漏未达到故障标准，可不考虑维修；The control system 8 detects the indoor temperature T3 and the refrigerant inlet and outlet temperature difference ΔT1 of the indoor unit heat exchanger 5, that is, ΔT1=T1-T2, and corresponds to the indoor temperature T3, and detects the detected temperature difference ΔT1, the indoor temperature T3, and the refrigerant charge. The injection amount is 95% of the standard charge amount and the refrigerant inlet and outlet temperature difference ΔT11 of the indoor unit heat exchanger 5 corresponding to the indoor unit fan 7 is located at a high-grade position, for example, ΔT1 < ΔT11, the control system preliminarily judges the refrigerant Leakage, otherwise it indicates that the refrigerant leakage does not meet the failure standard, and maintenance is not considered;
2)维修人员获取ΔT1、ΔT11以及ΔT1与ΔT11比较结果数据后，维修人员远程控制控制系统8改变室内机风机7的风量，将风量从高档切换到低档，获取低档风量时室内机换热器5的制冷剂进出口温差ΔT1d的数据，再与房间温度T3、制冷剂充注量为标准充注量95％、室内机风机7的风量位于低档时所对应的室内机换热器5的制冷剂进出口温差ΔT12进行比较，如ΔT1d＜ΔT12，则判断空调器制冷剂泄漏，否则表明制冷剂泄漏未达到故障标准，可 不考虑维修；2) After the maintenance personnel obtain ΔT1, ΔT11 and the comparison result data of ΔT1 and ΔT11, the maintenance personnel remote control control system 8 changes the air volume of the indoor unit fan 7, switches the air volume from the high level to the low level, and acquires the low air volume when the indoor unit heat exchanger 5 The refrigerant inlet and outlet temperature difference ΔT1d data, and then the room temperature T3, the refrigerant charge amount is 95% of the standard charge amount, and the indoor unit fan 7 is located at a low level, the refrigerant of the indoor unit heat exchanger 5 The temperature difference between the inlet and outlet is ΔT12. If ΔT1d<ΔT12, the air conditioner refrigerant leakage is judged. Otherwise, the refrigerant leakage does not reach the fault standard. Do not consider maintenance;
(b)室内机过滤网脏或风机电容衰减(b) Indoor unit filter dirty or fan capacitor attenuation
1)控制系统8检测室内温度T3、室外环境温度T7及室内机空气进出口的实测温差ΔT2即ΔT2＝T3-T4，将检测得到的实测温差ΔT2与控制系统8中实验得到的在室内温度T3及室外环境温度T7下的室内机空气进出口的实验温差ΔT21进行比较，如高档风量温差比k1≥1.2，其中高档风量温差比k1＝实测温差ΔT2/实验温差ΔT21，则初步判断室内机过滤网6脏或风机7电容衰减故障；1) The control system 8 detects the indoor temperature T3, the outdoor ambient temperature T7, and the measured temperature difference ΔT2 of the indoor unit air inlet and outlet, that is, ΔT2=T3-T4, and the detected measured temperature difference ΔT2 and the indoor temperature T3 obtained experimentally in the control system 8 And the experimental temperature difference ΔT21 of the indoor air inlet and outlet under the outdoor ambient temperature T7 is compared, for example, the high-grade air volume temperature difference ratio k1 ≥ 1.2, wherein the high-grade air volume temperature difference ratio k1 = the measured temperature difference ΔT2 / the experimental temperature difference ΔT21, the initial determination of the indoor unit filter 6 dirty or fan 7 capacitor attenuation failure;
2)维修人员获取ΔT2、ΔT21以及k1数据后，维修人员远程控制控制系统8改变室内机风机7的风量，将风量从高档切换到低档，运行5min，获取低档风量时室内机空气进出口的实测温差ΔT2d，将检测得到的实测温差ΔT2d与控制系统8中实验得到的在室内温度T3、室外环境温度T7下的室内机空气进出口的实验温差ΔT22进行比较，如0.9≤低档风量温差比k2/高档风量温差比k1≤1.1，其中低档风量温差比k2＝实测温差ΔT2d/实验温差ΔT22，可判断为过滤网6脏，如不在此范围，可判断为室内机风机7电容衰减；2) After the maintenance personnel obtain the ΔT2, ΔT21 and k1 data, the maintenance personnel remote control and control system 8 changes the air volume of the indoor unit fan 7, switches the air volume from the high level to the low level, runs for 5 minutes, and obtains the measured air intake of the indoor unit when the low air volume is obtained. The temperature difference ΔT2d compares the measured measured temperature difference ΔT2d with the experimental temperature difference ΔT22 of the indoor unit air inlet and outlet at the indoor temperature T3 and the outdoor ambient temperature T7 experimentally obtained in the control system 8, such as 0.9 ≤ low-range air volume temperature difference ratio k2/ The temperature difference of high-grade air volume is k1≤1.1, wherein the temperature difference of low-grade air volume is k2=measured temperature difference ΔT2d/experimental temperature difference ΔT22, it can be judged that the filter 6 is dirty. If it is not in this range, it can be judged that the indoor fan 7 is attenuated;
(c)室外机脏或室外风机电容衰减(c) Outdoor unit dirty or outdoor fan capacitor attenuation
1)控制系统8检测室内温度T3、室外环境温度T7、第一室外制冷剂温度T5及第二室外制冷剂温度T6，将检测得到的第一室外制冷剂温度T5及第二室外制冷剂温度T6与实验得到的在室内温度T3、室外环境温度T7下的第一室外制冷剂温度T5及第二室外制冷剂温度T6进行比较，如T5、T6的实际值均大于对应的实验值2℃以上，则初步判断室外机3脏或室外风机2电容衰减故障；1) The control system 8 detects the indoor temperature T3, the outdoor ambient temperature T7, the first outdoor refrigerant temperature T5, and the second outdoor refrigerant temperature T6, and detects the obtained first outdoor refrigerant temperature T5 and the second outdoor refrigerant temperature T6. Comparing with the first outdoor refrigerant temperature T5 and the second outdoor refrigerant temperature T6 obtained at the indoor temperature T3 and the outdoor ambient temperature T7, if the actual values of T5 and T6 are greater than the corresponding experimental value of 2 ° C or more, Then preliminary judgment of the outdoor unit 3 dirty or outdoor fan 2 capacitance attenuation failure;
2)控制系统8继续检测室外环境温度T7及室外空气侧出风温度T8，得到实际进出风温差ΔT3即ΔT3＝T8-T7，将检测得到温差ΔT3与控制系统8中实验得到的在室内温度T3及室外环境温度T7下的室外机空气进出口温差ΔT31进行比较，如ΔT3-ΔT31≥2℃，可判断为室外机风机2电容衰减故障，否则判断为室外机3脏；2) The control system 8 continues to detect the outdoor ambient temperature T7 and the outdoor air side exhaust air temperature T8, and obtains the actual inlet and outlet air temperature difference ΔT3, that is, ΔT3=T8-T7, and detects the temperature difference ΔT3 and the indoor temperature T3 obtained by the experiment in the control system 8. And the outdoor unit air inlet and outlet temperature difference ΔT31 under the outdoor ambient temperature T7, such as ΔT3-ΔT31 ≥ 2 ° C, can be judged as the outdoor unit fan 2 capacitance attenuation failure, otherwise it is determined that the outdoor unit 3 is dirty;
(五)空调器制热运行时的五种典型运行故障判断步骤如下：(5) The five typical operational failure judgment steps of the air conditioner heating operation are as follows:
如图2所示，所述四通阀17的入口与四通阀17的第二接口c连通，四通阀17的第一接口a与四通阀17的出口b与连通；As shown in FIG. 2, the inlet of the four-way valve 17 communicates with the second interface c of the four-way valve 17, and the first interface a of the four-way valve 17 communicates with the outlet b of the four-way valve 17;
(a)制冷剂泄漏(a) refrigerant leakage
1)控制系统8检测室内温度T3、室外环境温度T7、第二室内制冷剂温度T2及第一室内制冷剂温度T1，将检测得到的第二室内制冷剂温度T2及第一室内制冷剂温度T1与在室内温度T3、室外环境温度T7、制冷剂充注量为标准充注量95％下的第二室内制冷剂温度T2及 第一室内制冷剂温度T1进行比较，如T2、T1的实际值均小于对应的实验值，则初步判断制冷剂泄漏故障；1) The control system 8 detects the indoor temperature T3, the outdoor ambient temperature T7, the second indoor refrigerant temperature T2, and the first indoor refrigerant temperature T1, and detects the obtained second indoor refrigerant temperature T2 and the first indoor refrigerant temperature T1. And the second indoor refrigerant temperature T2 at the indoor temperature T3, the outdoor ambient temperature T7, and the refrigerant charge amount being 95% of the standard charge amount; The first indoor refrigerant temperature T1 is compared, and if the actual values of T2 and T1 are less than the corresponding experimental values, the refrigerant leakage fault is initially determined;
2)维修人员获取T2、T1的实际值以及对应的实验值数据后，维修人员远程控制控制系统8改变室内机风机7的风量，将风量从高档切换到低档，获取低档风量时室内机换热器5的第二室内制冷剂温度T2及第一室内制冷剂温度T1，将检测得到的第二室内制冷剂温度T2及第一室内制冷剂温度T1与在室内温度T3、室外环境温度T7、制冷剂充注量为标准充注量95％下的第二室内制冷剂温度T2及第一室内制冷剂温度T1进行比较，如的实际值均小于对应的实验值，则判断空调器制冷剂泄漏，否则表明制冷剂泄漏未达到故障标准，可不考虑维修；2) After the maintenance personnel obtain the actual values of T2 and T1 and the corresponding experimental value data, the maintenance personnel remote control and control system 8 changes the air volume of the indoor unit fan 7, switches the air volume from the high level to the low level, and obtains the low temperature air volume when the indoor unit heat exchange The second indoor refrigerant temperature T2 and the first indoor refrigerant temperature T1 of the device 5, the detected second indoor refrigerant temperature T2 and the first indoor refrigerant temperature T1 and the indoor temperature T3, the outdoor ambient temperature T7, and the cooling The charge amount of the agent is the second indoor refrigerant temperature T2 at a standard charge of 95% and the first indoor refrigerant temperature T1. If the actual value is less than the corresponding experimental value, the air conditioner refrigerant leak is judged. Otherwise, it indicates that the refrigerant leakage has not reached the failure standard, and maintenance may not be considered;
(b)室内机过滤网脏或风机电容衰减(b) Indoor unit filter dirty or fan capacitor attenuation
1)控制系统(8)检测室内温度T3、室外环境温度T7及室内机空气出口、进口的实测温差ΔT2即ΔT2＝T4-T3，将检测得到的实测温差ΔT2与控制系统8中实验得到的在室内温度T3、室外环境温度T7下的室内机空气出口、进口的实验温差ΔT21进行比较，如高档风量温差比k1≥1.2，其中高档风量温差比k1＝实测温差ΔT2/实验温差ΔT21，则初步判断室内机过滤网6脏或风机7电容衰减故障；1) The control system (8) detects the indoor temperature T3, the outdoor ambient temperature T7, and the measured temperature difference ΔT2 of the indoor air outlet and the inlet, that is, ΔT2=T4-T3, and the detected measured temperature difference ΔT2 is obtained from the experimental system 8 The indoor temperature T3 and the outdoor ambient temperature T7 are compared with the experimental temperature difference ΔT21 of the indoor unit air inlet and the inlet. For example, the high-grade air volume temperature difference ratio k1 ≥ 1.2, wherein the high-grade air volume temperature difference ratio k1 = the measured temperature difference ΔT2 / the experimental temperature difference ΔT21, the preliminary judgment Indoor unit filter 6 dirty or fan 7 capacitor attenuation failure;
2)维修人员获取ΔT2、ΔT21以及k1数据后，维修人员远程控制控制系统8改变室内机风机7的风量，将风量从高档切换到低档，获取低档风量时室内机空气出口、进口的实测温差ΔT2d，将检测得到的实测温差ΔT2d与控制系统8中实验得到的在室内温度T3、室外环境温度T7下的室内机空气出口、进口的实验温差ΔT22进行比较，如0.9≤低档风量温差比k2/高档风量温差比k1≤11，其中低档风量温差比k2＝实测温差ΔT2d/实验温差ΔT22，可判断为过滤网6脏，如不在此范围，可判断为室内机风机7电容衰减；2) After the maintenance personnel obtain the ΔT2, ΔT21 and k1 data, the maintenance personnel remote control and control system 8 changes the air volume of the indoor unit fan 7, switches the air volume from the high level to the low level, and obtains the measured temperature difference ΔT2d of the indoor air outlet and the inlet when the low air volume is obtained. The measured temperature difference ΔT2d is compared with the experimental temperature difference ΔT22 of the indoor air outlet and the inlet at the indoor temperature T3 and the outdoor ambient temperature T7 obtained by the control system 8, such as 0.9 ≤ low air volume temperature difference ratio k2 / high grade The air volume temperature difference ratio k1 ≤ 11, wherein the low air volume temperature difference ratio k2 = the measured temperature difference ΔT2d / the experimental temperature difference ΔT22, can be judged that the filter 6 is dirty, if not in this range, it can be determined that the indoor unit fan 7 capacitance is attenuated;
(c)室外机脏或室外风机电容衰减(c) Outdoor unit dirty or outdoor fan capacitor attenuation
1)控制系统8检测室内温度T3、室外环境温度T7、第一室外制冷剂温度T5及第二室外制冷剂温度T6，将检测得到的第二室外制冷剂温度T6及第一室外制冷剂温度T5与实验得到的在室内温度T3、室外环境温度T7下的第一室外制冷剂温度T5及第二室外制冷剂温度T6进行比较，如T5、T6的实际值均比对应的实验值低2℃以上，则初步判断室外机3脏或室外风机2电容衰减故障；1) The control system 8 detects the indoor temperature T3, the outdoor ambient temperature T7, the first outdoor refrigerant temperature T5, and the second outdoor refrigerant temperature T6, and detects the obtained second outdoor refrigerant temperature T6 and the first outdoor refrigerant temperature T5. Compared with the experimentally obtained first outdoor refrigerant temperature T5 and the second outdoor refrigerant temperature T6 at the indoor temperature T3 and the outdoor ambient temperature T7, the actual values of T5 and T6 are both lower than the corresponding experimental values by 2 ° C or more. , preliminary judgment of the outdoor unit 3 dirty or outdoor fan 2 capacitor attenuation failure;
2)控制系统8继续检测室外环境温度T7及室外空气侧出风温度T8，得到实际进出风温差ΔT3即ΔT3＝T7-T8，将检测得到温差ΔT3与控制系统8中实验得到的在室内温度T3、室外环境温度T7下的室外机空气进出口温差ΔT31进行比较，如ΔT3-ΔT31≥2℃，可判断为 室外机风机2电容衰减故障，否则判断为室外机3脏。2) The control system 8 continues to detect the outdoor ambient temperature T7 and the outdoor air side exhaust air temperature T8, and obtains the actual inlet and outlet air temperature difference ΔT3, that is, ΔT3=T7-T8, and detects the temperature difference ΔT3 and the indoor temperature T3 obtained by the experiment in the control system 8. Comparing the outdoor unit air inlet and outlet temperature difference ΔT31 at the outdoor ambient temperature T7, such as ΔT3-ΔT31≥2°C, it can be judged as The outdoor unit fan 2 has a capacitor attenuation failure, otherwise it is judged that the outdoor unit 3 is dirty.
尽管已经示出和描述了本发明的实施例，本领域的普通技术人员可以理解：在不脱离本发明的原理和宗旨的情况下可以对这些实施例进行多种变化、修改、替换及变形，本发明的范围由权利要求及其等同物限定。 While the embodiments of the present invention have been shown and described, the embodiments of the invention The scope of the invention is defined by the claims and their equivalents.

Claims (1)

  1. 一种空调器远程控制运行故障判断方法，其特征在于空调器包括压缩机(1)、室外机风机(2)、室外换热器(3)、节流装置(4)、室内换热器(5)、室内过滤器(6)、室内机风机(7)、控制系统(8)、室内换热器入口温度传感器(9)、室内换热器出口温度传感器(10)、室内回风温度传感器也即房间温度传感器(11)、室内出风温度传感器(12)、室外机换热器入口温度传感器(13)、室外机换热器出口温度传感器(14)、室外进风温度传感器也即环境温度传感器(15)、室外出风温度传感器(16)及用于制冷与制热运行转换的四通阀(17)；所述室内换热器入口温度传感器(9)检测室内换热器(5)入口的第一室内制冷剂温度T1，室内换热器出口温度传感器(10)检测室内换热器(5)出口的第二室内制冷剂温度T2，室内回风温度传感器也即房间温度传感器(11)检测室内换热器(5)的空气侧进风温度即室内温度T3，室内出风温度传感器(12)检测室内换热器(5)的室内空气侧出风温度T4，室外机换热器入口温度传感器(13)检测室外换热器(3)入口的第一室外制冷剂温度T5，室外机换热器出口温度传感器(14)检测室外换热器(3)出口的第二室外制冷剂温度T6，室外进风温度传感器也即环境温度传感器(15)检测室外环境温度T7，室外出风温度传感器(16)检测室外换热器(3)的室外空气侧出风温度T8，控制系统(8)运行故障判断如下：An air conditioner remote control operation failure judging method, characterized in that the air conditioner comprises a compressor (1), an outdoor unit fan (2), an outdoor heat exchanger (3), a throttling device (4), an indoor heat exchanger ( 5), indoor filter (6), indoor unit fan (7), control system (8), indoor heat exchanger inlet temperature sensor (9), indoor heat exchanger outlet temperature sensor (10), indoor return air temperature sensor That is, room temperature sensor (11), indoor air temperature sensor (12), outdoor heat exchanger inlet temperature sensor (13), outdoor heat exchanger outlet temperature sensor (14), outdoor air temperature sensor, that is, the environment Temperature sensor (15), outdoor air temperature sensor (16) and four-way valve (17) for cooling and heating operation conversion; said indoor heat exchanger inlet temperature sensor (9) detecting indoor heat exchanger (5) The first indoor refrigerant temperature T1 of the inlet, the indoor heat exchanger outlet temperature sensor (10) detects the second indoor refrigerant temperature T2 at the outlet of the indoor heat exchanger (5), and the indoor return air temperature sensor is also the room temperature sensor ( 11) Detecting the air side inlet air temperature of the indoor heat exchanger (5), that is, the indoor temperature T3, The indoor air temperature sensor (12) detects the indoor air side air outlet temperature T4 of the indoor heat exchanger (5), and the outdoor unit heat exchanger inlet temperature sensor (13) detects the first outdoor cooling of the outdoor heat exchanger (3) inlet. The temperature T5 of the agent, the outdoor heat exchanger outlet temperature sensor (14) detects the second outdoor refrigerant temperature T6 at the outlet of the outdoor heat exchanger (3), and the outdoor inlet temperature sensor, that is, the ambient temperature sensor (15) detects the outdoor ambient temperature. T7, the outdoor air temperature sensor (16) detects the outdoor air side air outlet temperature T8 of the outdoor heat exchanger (3), and the control system (8) operation fault is judged as follows:
    (一)通过实验，空调器制冷剂标准充注量时，在不同室内温度T3、不同室外环境温度T7以及室内机风机(7)在高、低两档风量下，空调器制冷、制热运行时，获得第一室内制冷剂温度T1、第二室内制冷剂温度T2、室内空气侧出风温度T4、第一室外制冷剂温度T5、第二室外制冷剂温度T6及室外空气侧出风温度T8的数据；(1) Through experiments, when the air conditioner refrigerant standard charge amount, the air conditioner refrigeration and heating operation under different indoor temperature T3, different outdoor environmental temperature T7, and indoor unit fan (7) in high and low air volume At the time, the first indoor refrigerant temperature T1, the second indoor refrigerant temperature T2, the indoor air side outlet air temperature T4, the first outdoor refrigerant temperature T5, the second outdoor refrigerant temperature T6, and the outdoor air side outlet air temperature T8 are obtained. The data;
    (二)通过实验，空调器制冷剂充注量为标准充注量95％时，在不同室内温度T3、不同室外环境温度T7以及室内机风机(7)在高、低两档风量下，空调器制冷、制热运行时，获得第一室内制冷剂温度T1、第二室内制冷剂温度T2、室内空气侧出风温度T4、第一室外制冷剂温度T5、第二室外制冷剂温度T6及室外空气侧出风温度T8的数据；(2) Through experiments, when the refrigerant charge of the air conditioner is 95% of the standard charge, the air temperature in different indoor temperatures T3, different outdoor ambient temperature T7, and indoor unit fan (7) in the high and low air volumes, air conditioning During the cooling and heating operation, the first indoor refrigerant temperature T1, the second indoor refrigerant temperature T2, the indoor air side outlet air temperature T4, the first outdoor refrigerant temperature T5, the second outdoor refrigerant temperature T6, and the outdoor are obtained. Data on the air side outlet temperature T8;
    (三)远程控制空调器的控制系统(8)具有常规空调器运行时故障检测报警功能，且空调器每累计运行一段时间，控制系统(8)对空调器进行一次精确运行故障判断，精确运行故障判断开始时，控制系统(8)自动将室内机风机(7)的风量调到高风量状态；控制系统(8)获取空调器中第一室内制冷剂温度T1、第二室内制冷剂温度T2、室内温度T3、室内空气侧出风温度T4、第一室外制冷剂温度T5、第二室外制冷剂温度T6、室外环境温度T7及室外空气侧出风温度T8的温度数据，控制系统(8)将获得的温度数据与空调器的内置实验数据进行比较并初步判断，并将可能出现的故障及时通过无线网络传输给维修人员，维修 人员根据上传数据及可能出现的故障远程控制空调器改变运行模式，获取新的运行数据，进行二次判断，对制冷空调器制冷及制热运行进行判断；(3) The control system (8) of the remote control air conditioner has the function of fault detection and alarm of the operation of the conventional air conditioner, and the control system (8) performs an accurate operation fault judgment on the air conditioner every time the air conditioner is operated for a long time, and accurately operates. When the fault judgment starts, the control system (8) automatically adjusts the air volume of the indoor unit fan (7) to a high air volume state; the control system (8) acquires the first indoor refrigerant temperature T1 and the second indoor refrigerant temperature T2 in the air conditioner. Temperature data of indoor temperature T3, indoor air side outlet temperature T4, first outdoor refrigerant temperature T5, second outdoor refrigerant temperature T6, outdoor ambient temperature T7, and outdoor air side outlet temperature T8, control system (8) Compare the obtained temperature data with the built-in experimental data of the air conditioner and make a preliminary judgment, and transmit the possible faults to the maintenance personnel through the wireless network in time. The personnel remotely control the air conditioner to change the operation mode according to the uploaded data and possible failures, obtain new operation data, perform second judgment, and judge the refrigeration and heating operation of the refrigeration air conditioner;
    (四)控制系统(8)在空调器制冷运行时五种典型运行故障判断步骤如下：(4) Control system (8) The five typical operational failure judgment steps in the air conditioner refrigeration operation are as follows:
    (a)制冷剂泄漏(a) refrigerant leakage
    控制系统(8)检测到室内温度T3及室内机换热器(5)的制冷剂进出口温差ΔT1即ΔT1＝T1-T2，对应此时室内温度T3，将检测得到的温差ΔT1与室内温度T3、制冷剂充注量为标准充注量95％及室内机风机(7)的风量位于高档位时所对应的室内机换热器(5)的制冷剂进出口温差ΔT11进行比较，如ΔT1＜ΔT11，控制系统(8)初步判断制冷剂泄漏，否则表明制冷剂泄漏未达到故障标准，可不考虑维修；The control system (8) detects the indoor temperature T3 and the refrigerant inlet and outlet temperature difference ΔT1 of the indoor unit heat exchanger (5), that is, ΔT1=T1-T2, corresponding to the indoor temperature T3, and the detected temperature difference ΔT1 and the indoor temperature T3. The refrigerant charge amount is 95% of the standard charge amount and the air volume of the indoor unit fan (7) is compared with the refrigerant inlet and outlet temperature difference ΔT11 of the indoor unit heat exchanger (5) corresponding to the high-end position, such as ΔT1< ΔT11, the control system (8) initially judges the refrigerant leakage, otherwise it indicates that the refrigerant leakage does not meet the failure standard, and the maintenance may not be considered;
    2)维修人员获取ΔT1、ΔT11以及ΔT1与ΔT11比较结果数据后，维修人员远程控制控制系统(8)改变室内机风机(7)的风量，将风量从高档切换到低档，获取低档风量时室内机换热器(5)的制冷剂进出口温差ΔT1d的数据，再与房间温度T3、制冷剂充注量为标准充注量95％、室内机风机(7)的风量位于低档时所对应的室内机换热器(5)的制冷剂进出口温差ΔT12进行比较，如ΔT1d＜ΔT12，则判断空调器制冷剂泄漏，否则表明制冷剂泄漏未达到故障标准，可不考虑维修；2) After the maintenance personnel obtain ΔT1, ΔT11 and the comparison result data of ΔT1 and ΔT11, the maintenance personnel remote control control system (8) changes the air volume of the indoor unit fan (7), switches the air volume from the high level to the low level, and acquires the low air volume when the indoor unit The data of the temperature difference ΔT1d of the refrigerant inlet and outlet of the heat exchanger (5), and the room corresponding to the room temperature T3, the refrigerant charge amount is 95% of the standard charge, and the air volume of the indoor unit fan (7) is at the low level. The refrigerant inlet and outlet temperature difference ΔT12 of the machine heat exchanger (5) is compared, for example, ΔT1d < ΔT12, the air conditioner refrigerant leakage is judged, otherwise the refrigerant leakage does not reach the failure standard, and the maintenance may be ignored;
    (b)室内机过滤网脏或风机电容衰减(b) Indoor unit filter dirty or fan capacitor attenuation
    1)控制系统(8)检测室内温度T3、室外环境温度T7及室内机空气进出口温差ΔT2即ΔT2＝T3-T4，将检测得到的实测温差ΔT2与控制系统(8)中实验得到的在室内温度T3及室外环境温度T7下的室内机空气进出口实验温差ΔT21进行比较，如高档风量温差比k1≥1.2，其中高档风量温差比k1＝实测温差ΔT2/实验温差ΔT21，则初步判断室内机过滤网(6)脏或风机(7)电容衰减故障；1) The control system (8) detects the indoor temperature T3, the outdoor ambient temperature T7, and the indoor unit air inlet and outlet temperature difference ΔT2, ie ΔT2=T3-T4, and the detected measured temperature difference ΔT2 and the experimental system (8) obtained in the laboratory Temperature T3 and outdoor ambient temperature T7 under the indoor air inlet and outlet experimental temperature difference ΔT21 comparison, such as high-grade air volume temperature difference ratio k1 ≥ 1.2, of which high-grade air volume temperature difference ratio k1 = measured temperature difference ΔT2 / experimental temperature difference ΔT21, then preliminary judgment indoor unit filtration Net (6) dirty or fan (7) capacitor attenuation fault;
    2)维修人员获取ΔT2、ΔT21以及k1数据后，维修人员远程控制控制系统(8)改变室内机风机(7)的风量，将风量从高档切换到低档，获取低档风量时室内机空气进出口的实测温差ΔT2d，将检测得到的实测温差ΔT2d与控制系统(8)中实验得到的在室内温度T3、室外环境温度T7下的室内机空气进出口的实验温差ΔT22进行比较，如0.9≤低档风量温差比k2/高档风量温差比k1≤1.1，其中低档风量温差比k2＝实测温差ΔT2d/实验温差ΔT22，可判断为过滤网(6)脏，如不在此范围，可判断为室内机风机(7)电容衰减；2) After the maintenance personnel obtain the data of ΔT2, ΔT21 and k1, the maintenance personnel remote control and control system (8) changes the air volume of the indoor unit fan (7), switches the air volume from the high level to the low level, and obtains the air inlet and outlet of the indoor unit when the low air volume is obtained. The measured temperature difference ΔT2d compares the measured measured temperature difference ΔT2d with the experimental temperature difference ΔT22 of the indoor unit air inlet and outlet at the indoor temperature T3 and the outdoor ambient temperature T7 obtained in the control system (8), such as 0.9 ≤ low air volume temperature difference Compared with k2/high-grade air volume temperature difference ratio k1≤1.1, wherein the low-speed air volume temperature difference ratio k2=measured temperature difference ΔT2d/experimental temperature difference ΔT22, it can be judged that the filter (6) is dirty, if not in this range, it can be judged as indoor unit fan (7) Capacitance attenuation;
    (c)室外机脏或室外风机电容衰减(c) Outdoor unit dirty or outdoor fan capacitor attenuation
    1)控制系统(8)检测室内温度T3、室外环境温度T7、第一室外制冷剂温度T5及第二室外制冷剂温度T6，将检测得到的第一室外制冷剂温度T5及第二室外制冷剂温度T6与实验 得到的在室内温度T3、室外环境温度T7下的第一室外制冷剂温度T5及第二室外制冷剂温度T6进行比较，如T5、T6的实际值均大于对应的实验值2℃以上，则初步判断室外机(3)脏或室外风机(2)电容衰减故障；1) The control system (8) detects the indoor temperature T3, the outdoor ambient temperature T7, the first outdoor refrigerant temperature T5, and the second outdoor refrigerant temperature T6, and detects the obtained first outdoor refrigerant temperature T5 and the second outdoor refrigerant Temperature T6 and experiment The obtained first outdoor refrigerant temperature T5 and the second outdoor refrigerant temperature T6 at the indoor temperature T3 and the outdoor ambient temperature T7 are compared, and if the actual values of T5 and T6 are both greater than the corresponding experimental value of 2 ° C or more, preliminary Judging whether the outdoor unit (3) dirty or outdoor fan (2) capacitor attenuation fault;
    2)控制系统(8)继续检测室外环境温度T7及室外空气侧出风温度T8，得到实际进出风温差ΔT3即ΔT3＝T8-T7，将检测得到实际进出温差ΔT3与控制系统(8)中实验得到的在室内温度T3及室外环境温度T7下的室外机空气进出口温差ΔT31进行比较，如ΔT3-ΔT31≥2℃，可判断为室外机风机(2)电容衰减故障，否则判断为室外机(3)脏；2) The control system (8) continues to detect the outdoor ambient temperature T7 and the outdoor air side outlet temperature T8, and obtains the actual inlet and outlet air temperature difference ΔT3, ie ΔT3=T8-T7, which will detect the actual temperature difference ΔT3 and the experiment in the control system (8). The obtained outdoor air inlet and outlet temperature difference ΔT31 at the indoor temperature T3 and the outdoor ambient temperature T7 is compared, for example, ΔT3 - ΔT31 ≥ 2 ° C, it can be judged that the outdoor unit fan (2) capacitor attenuation failure, otherwise it is judged as an outdoor unit ( 3) dirty;
    (五)空调器制热运行时的五种典型运行故障判断步骤如下：(5) The five typical operational failure judgment steps of the air conditioner heating operation are as follows:
    制冷剂泄漏Refrigerant leak
    1)控制系统(8)检测室内温度T3、室外环境温度T7、第二室内制冷剂温度T2及第一室内制冷剂温度T1，将检测得到的第二室内制冷剂温度T2及第一室内制冷剂温度T1与在室内温度T3、室外环境温度T7、制冷剂充注量为标准充注量95％下的第二室内制冷剂温度T2及第一室内制冷剂温度T1进行比较，如T2、T1的实际值均小于对应的实验值，则初步判断制冷剂泄漏故障；1) The control system (8) detects the indoor temperature T3, the outdoor ambient temperature T7, the second indoor refrigerant temperature T2, and the first indoor refrigerant temperature T1, and detects the obtained second indoor refrigerant temperature T2 and the first indoor refrigerant The temperature T1 is compared with the second indoor refrigerant temperature T2 at the indoor temperature T3, the outdoor ambient temperature T7, the refrigerant charge amount being 95% of the standard charge amount, and the first indoor refrigerant temperature T1, such as T2 and T1. If the actual value is less than the corresponding experimental value, the refrigerant leakage fault is initially determined;
    2)维修人员获取T2、T1的实际值以及对应的实验值数据后，维修人员远程控制控制系统(8)改变室内机风机(7)的风量，将风量从高档切换到低档，获取低档风量时室内机换热器(5)的第二室内制冷剂温度T2及第一室内制冷剂温度T1，将检测得到的第二室内制冷剂温度T2及第一室内制冷剂温度T1与在室内温度T3、室外环境温度T7、制冷剂充注量为标准充注量95％下的第二室内制冷剂温度T2及第一室内制冷剂温度T1进行比较，如T2、T1的实际值均小于对应的实验值，则判断空调器制冷剂泄漏，否则表明制冷剂泄漏未达到故障标准，可不考虑维修；2) After the maintenance personnel obtain the actual values of T2 and T1 and the corresponding experimental value data, the maintenance personnel remote control and control system (8) changes the air volume of the indoor unit fan (7), switches the air volume from high to low, and acquires low air volume. The second indoor refrigerant temperature T2 and the first indoor refrigerant temperature T1 of the indoor unit heat exchanger (5), the detected second indoor refrigerant temperature T2 and the first indoor refrigerant temperature T1 and the indoor temperature T3, The outdoor ambient temperature T7, the refrigerant charge amount is the second indoor refrigerant temperature T2 under the standard charge amount of 95%, and the first indoor refrigerant temperature T1 is compared, for example, the actual values of T2 and T1 are smaller than the corresponding experimental values. , it is judged that the refrigerant of the air conditioner leaks, otherwise it indicates that the refrigerant leakage does not meet the failure standard, and the maintenance may not be considered;
    (b)室内机过滤网脏或风机电容衰减(b) Indoor unit filter dirty or fan capacitor attenuation
    1)控制系统(8)检测室内温度T3、室外环境温度T7及室内机空气出口、进口的实测温差ΔT2即ΔT2＝T4-T3，将检测得到实测温差ΔT2与控制系统(8)中实验得到的在室内温度T3、室外环境温度T7下的室内机空气出口、进口实验温差ΔT21进行比较，如高档风量温差比k1≥1.2，其中高档风量温差比k1＝实测温差ΔT2/实验温差ΔT21，则初步判断室内机过滤网(6)脏或风机(7)电容衰减故障；1) The control system (8) detects the indoor temperature T3, the outdoor ambient temperature T7, and the measured temperature difference ΔT2 of the indoor unit air outlet and inlet, ie ΔT2=T4-T3, which will detect the measured temperature difference ΔT2 and the experimental result obtained in the control system (8). Comparing indoor unit air outlet and inlet experimental temperature difference ΔT21 under indoor temperature T3 and outdoor ambient temperature T7, such as high-grade air volume temperature difference ratio k1≥1.2, wherein high-grade air volume temperature difference ratio k1=measured temperature difference ΔT2/experimental temperature difference ΔT21, preliminary judgment Indoor unit filter (6) dirty or fan (7) capacitor attenuation failure;
    2)维修人员获取ΔT2、ΔT21以及k1数据后，维修人员远程控制控制系统(8)改变室内机风机(7)的风量，将风量从高档切换到低档，获取低档风量时室内机空气出口、进口的实测温差ΔT2d，将检测得到的实测温差ΔT2d与控制系统(8)中实验得到的在室内温度 T3、室外环境温度T7下的室内机空气出口、进口的实验温差ΔT22进行比较，如0.9≤低档风量温差比k2/高档风量温差比k1≤1.1，其中低档风量温差比k2＝实测温差ΔT2d/实验温差ΔT22，可判断为过滤网(6)脏，如不在此范围，可判断为室内机风机(7)电容衰减；2) After the maintenance personnel obtain the ΔT2, ΔT21 and k1 data, the maintenance personnel remote control and control system (8) changes the air volume of the indoor unit fan (7), switches the air volume from the high level to the low level, and obtains the indoor air outlet and the inlet when the low air volume is obtained. The measured temperature difference ΔT2d, the measured measured temperature difference ΔT2d and the indoor temperature obtained in the control system (8) T3, outdoor ambient temperature T7 indoor air outlet, inlet experimental temperature difference ΔT22 comparison, such as 0.9 ≤ low wind volume temperature difference ratio k2 / high air volume temperature difference ratio k1 ≤ 1.1, of which low wind volume temperature difference ratio k2 = measured temperature difference ΔT2d / experiment The temperature difference ΔT22 can be judged as the filter (6) is dirty. If it is not in this range, it can be judged that the indoor fan (7) has a capacitor attenuation;
    (c)室外机脏或室外风机电容衰减(c) Outdoor unit dirty or outdoor fan capacitor attenuation
    1)控制系统(8)检测室内温度T3、室外环境温度T7、第一室外制冷剂温度T5及第二室外制冷剂温度T6，将检测得到的第二室外制冷剂温度T6及第一室外制冷剂温度T5与实验得到的在室内温度T3、室外环境温度T7下的第一室外制冷剂温度T5及第二室外制冷剂温度T6，如T5、T6的实际值均比对应的实验值低2℃以上，则初步判断室外机(3)脏或室外风机(2)电容衰减故障；1) The control system (8) detects the indoor temperature T3, the outdoor ambient temperature T7, the first outdoor refrigerant temperature T5, and the second outdoor refrigerant temperature T6, and detects the obtained second outdoor refrigerant temperature T6 and the first outdoor refrigerant The temperature T5 and the experimentally obtained first outdoor refrigerant temperature T5 at the indoor temperature T3 and the outdoor outdoor temperature T7 and the second outdoor refrigerant temperature T6, such as the actual values of T5 and T6, are both lower than the corresponding experimental value by 2 ° C or more. , initially judge the outdoor unit (3) dirty or outdoor fan (2) capacitor attenuation failure;
    2)控制系统(8)继续检测室外环境温度T7及室外空气侧出风温度T8，得到实际进出风温差ΔT3即ΔT3＝T7-T8，将检测得到温差ΔT3与控制系统(8)中实验得到的在室内温度T3、室外环境温度T7下的室外机空气进出口温差ΔT31进行比较，如ΔT3-ΔT31≥2℃，可判断为室外机风机(2)电容衰减故障，否则判断为室外机(3)脏。 2) The control system (8) continues to detect the outdoor ambient temperature T7 and the outdoor air side outlet temperature T8, and obtains the actual inlet and outlet air temperature difference ΔT3, ie ΔT3=T7-T8, which will detect the temperature difference ΔT3 and the experimental result obtained in the control system (8). Comparing the outdoor unit air inlet and outlet temperature difference ΔT31 at indoor temperature T3 and outdoor ambient temperature T7, for example, ΔT3-ΔT31≥2°C, it can be judged that the outdoor unit fan (2) capacitor attenuation failure, otherwise it is judged as outdoor unit (3) dirty.
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