CN106765947B - Air conditioner diagnosis detecting system - Google Patents

Abstract

The invention discloses a novel air conditioner diagnosis detection system which comprises a main control MCU, a coding and decoding module, an analog-to-digital converter, an infrared receiver, a temperature sensor and an electric quantity detection chip, wherein the infrared receiver is used for acquiring a set temperature infrared signal sent by an air conditioner remote controller, the infrared signal is converted by the analog-to-digital converter, the coding and decoding module decodes the set temperature and sends the set temperature to the main control MCU, and the main control MCU calculates the fault type of an air conditioner according to the relation among the indoor environment temperature, the set temperature and power consumption data. The invention has wide monitoring range, the existing electric quantity detecting chip detects whether the voltage input is over-voltage or under-voltage and whether the input current is overlarge, the set temperature is identified through an infrared decoding technology, the temperature sensor detects the actual indoor temperature, and the comprehensive cloud server extracts the outdoor data of the network weather prediction.

Description

An air conditioner diagnosis and detection system

technical field

The invention relates to the field of air conditioners, in particular to an air conditioner diagnosis and detection system.

Background technique

Generally, the air conditioner only has external motor temperature protection prompts, room temperature display, etc., but there is no correct feedback information for the user to communicate with the actual performance of the air conditioner. The user cannot know whether the cooling of the air conditioner is normal or whether the use environment is appropriate. The user only knows to turn on the power and set it to use, and the air conditioner only knows to run all the time, and stop the compressor after reaching the set temperature. Motor aging, etc.), or external problems (for example, the outdoor temperature is too high or the cooling space is too large, etc.).

Contents of the invention

In view of the above-mentioned limitations of the traditional air conditioner itself, the purpose of the present invention is to provide an air conditioner diagnosis and detection system.

The technical scheme adopted in the present invention is:

An air conditioner diagnosis and detection system, including a main control MCU, a codec module, an analog-to-digital converter, an infrared receiver, a temperature sensor, and a power detection chip, and the main control MCU, an analog-to-digital converter, and a codec module are electrically connected in sequence , the analog-to-digital converter is electrically connected to the infrared receiver, and the infrared receiver is used to obtain the set temperature infrared signal sent by the remote control of the air conditioner. The temperature sensor is used to detect the indoor environment temperature of the air conditioner and feed it back to the main control MCU. The power detection chip is used to detect the power consumption data of the air conditioner and feed it back to the main control MCU. The power consumption data includes voltage and current. The control MCU calculates the fault type of the air conditioner according to the relationship between the indoor ambient temperature, the set temperature and the power consumption data;

The algorithm for calculating the air conditioner failure type by the main control MCU is: when the predetermined temperature reduction range is within the ±20% range of the actual temperature reduction range, it is normal operation, otherwise it is abnormal operation; wherein, the actual temperature reduction range=F(t30 )-F(t0), F(t0) is the initial indoor temperature, F(t30) is the indoor temperature after 30 minutes"; the predetermined temperature reduction range = (∑ _t30-t0 (voltage v*current a))*energy efficiency ratio B/(space area A*initial temperature refrigeration coefficient R*power factor rate C), v is the voltage value from 0 to 30 minutes, a is the current value from 0 to 30 minutes; C is the power factor Cos￠ , set it to 0.80, calculate the current according to the inductive load, the calculation formula is I=(P/U)/Cos￠; A is the nominal use space, B is the nominal energy efficiency ratio, R is the initial temperature cooling coefficient, that is, The cooling coefficient corresponding to the initial outdoor temperature and the initial indoor temperature.

The air conditioner diagnosis and detection system also includes a mobile phone APP and a cloud server. The main control MCU extracts the manufacturer information and model information of the air conditioner remote controller from the decoded set temperature infrared signal, and uploads them to the cloud server. The cloud server is associated with a code The remote control key information is retrieved from the coding library according to the manufacturer information and model information, and the remote control key information is fed back to the main control MCU or the mobile phone APP added to the management system. The mobile phone APP is used to directly output the remote control key information instructions to the The main control MCU or indirectly through the cloud server outputs remote control button information commands to the main control MCU, and the main control MCU controls the infrared emitter to emit infrared signals to the air conditioner.

The cloud server is also used to extract network forecast weather data and feed it back to the main control MCU. The network forecast weather data has outdoor temperature so that the main control MCU can add the outdoor temperature to the algorithm for calculating the type of air conditioner failure.

The coding library includes a self-built infrared code library and/or a third-party code library.

When the mobile phone APP is in the local area network where the main control MCU is located, it communicates with the main control MCU through Wi Fi.

The set temperature infrared signal sent by the remote controller of the air conditioner includes a frame header, manufacturer information and model information, a key field, and a frame tail.

Beneficial effects of the present invention:

The invention has a wide range of monitoring. The electric power detection chip detects whether the voltage input is overvoltage or undervoltage and detects whether the input current is too large. It also uses infrared decoding technology to identify the set temperature and the temperature sensor to detect the actual indoor temperature, and the integrated cloud server Extract the outdoor data of the network weather forecast, comprehensively introduce the sampling current, sampling voltage, indoor temperature and outdoor temperature into the influencing factors of the predetermined temperature reduction range, and use the software algorithm combined with the calculation formula of the predetermined temperature reduction range to obtain a real and effective predetermined temperature reduction Amplitude, which is compared with the actual temperature reduction range to judge whether the air conditioner is running normally; this detection method can use absolute, real and effective indoor and outdoor temperature factors to participate in the calculation when the above-mentioned current and voltage detection cannot actually monitor the operation of the air conditioner, so that Identify possible non-routine detection faults such as dust accumulation in the heat dissipation system, too little refrigerant, whether the used space does not match the nominal, and unreasonable installation pipelines.

Description of drawings

The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

Fig. 1 is a schematic diagram of the off-line air conditioner diagnosis and detection system of the present invention;

Fig. 2 is a schematic diagram of the online air conditioner diagnosis and detection system of the present invention;

Fig. 3 is the set temperature infrared signal waveform diagram of the air conditioner remote controller;

Figure 4 is a graph showing the variation of cooling capacity with outdoor temperature at different temperatures.

Detailed ways

As shown in FIG. 1 , it is an air conditioner diagnosis and detection system of the present invention, including a main control MCU, a codec module, an analog-to-digital converter, an infrared receiver, a temperature sensor, and a power detection chip.

The main control MCU, analog-to-digital converter, and codec module are electrically connected in sequence, and the analog-to-digital converter is electrically connected to the infrared receiver. The infrared receiver is used to obtain the set temperature infrared signal sent by the remote control of the air conditioner. The analog-to-digital converter converts and the codec module decodes the set temperature and sends it to the main control MCU. The temperature sensor is used to detect the indoor ambient temperature of the air conditioner and feeds back to the main control MCU. The power detection chip is used to detect the power consumption data of the air conditioner. And fed back to the main control MCU, the power consumption data includes voltage and current, and the main control MCU calculates the fault type of the air conditioner according to the relationship between the indoor ambient temperature, the set temperature and the power consumption data.

As shown in Figure 2, the air conditioner diagnosis and detection system also includes a mobile phone APP and a cloud server, and the main control MCU extracts the manufacturer information and model information of the air conditioner remote controller from the decoded set temperature infrared signal, and uploads them to the cloud server , the cloud server is associated with a coding library, and the remote control button information is retrieved from the coding library according to the manufacturer information and model information, and the remote control button information is fed back to the main control MCU or the mobile phone APP added to the management system. The remote control key information command is sent to the main control MCU or indirectly through the cloud server to output the remote control key information command to the main control MCU, and the main control MCU controls the infrared emitter to emit infrared signals to the air conditioner.

Further, the cloud server is also used to extract network forecast weather data and feed it back to the main control MCU. The network forecast weather data has outdoor temperature so that the main control MCU can add the outdoor temperature to the algorithm for calculating the type of air conditioner failure.

The algorithm for calculating the air conditioner failure type by the main control MCU is: when the predetermined temperature reduction range is within the ±20% range of the actual temperature reduction range, it is normal operation, otherwise it is abnormal operation; wherein, the actual temperature reduction range=F(t30 )-F(t0), F(t0) is the initial indoor temperature, F(t30) is the indoor temperature after 30 minutes"; the predetermined temperature reduction range = (∑ _t30-t0 (voltage v*current a))*energy efficiency ratio B/(space area A*initial temperature refrigeration coefficient R*power factor rate C), v is the voltage value from 0 to 30 minutes, a is the current value from 0 to 30 minutes; C is the power factor Cos￠ , set it to 0.80, calculate the current according to the inductive load, the calculation formula is I=(P/U)/Cos￠; A is the nominal use space, B is the nominal energy efficiency ratio, R is the initial temperature cooling coefficient, that is, The cooling coefficient corresponding to the initial outdoor temperature and the initial indoor temperature.

Wherein, the code library includes a self-built infrared code library and/or a third-party code library. When the mobile phone APP is in the local area network where the main control MCU is located, it communicates with the main control MCU through WiFi; otherwise, it communicates with the cloud server through the mobile network, and then the The cloud server forwards the signal to the main control MCU, so as to realize two control modes: local and remote. As shown in Figure 3, the set temperature infrared signal sent by the remote control of the air conditioner includes a frame header, manufacturer information and model information, a key field, and a frame tail.

Since the current and voltage detection can only be applied to the air conditioner operation monitoring when the power grid fluctuates or fails, and for possible problems such as dust accumulation in the heat dissipation system, too little refrigerant, whether the used space does not match the nominal value, and unreasonable installation pipelines, etc. Unconventional detection of faults, but can not actually monitor the operation of the air conditioner. Therefore, the present invention also starts from another angle, that is, temperature detection, and introduces absolute, real and effective indoor and outdoor temperature factors to participate in the calculation to improve the detection accuracy. Therefore, the purpose of introducing the outdoor temperature to participate in the calculation of the present invention is that the outdoor temperature will also have a greater impact on the cooling capacity, as shown in Table 1 and Figure 4 obtained from the following experiments:

As the outdoor temperature increases and the indoor temperature decreases, the cooling coefficient R will decrease accordingly. Therefore, introducing indoor temperature and outdoor temperature to participate in the calculation is beneficial to improve the accuracy, and directly using the cloud server to obtain the outdoor temperature from the network can reduce The layout cost of the outdoor temperature sensor.

As mentioned above, it can be seen that the monitoring range of the present invention is wide. The existing power detection chip detects whether the voltage input is overvoltage or undervoltage and detects whether the input current is too large. It also uses infrared decoding technology to identify the set temperature and the temperature sensor detects the actual Indoor temperature, and the outdoor data extracted from the network weather forecast by the integrated cloud server, the sampling current, sampling voltage, indoor temperature and outdoor temperature are comprehensively introduced into the influencing factors of the predetermined temperature reduction range, and the software algorithm is combined with the calculation formula of the predetermined temperature reduction range to obtain The real and effective predetermined temperature reduction range can be compared with the actual temperature reduction range to judge whether the air conditioner is running normally; this detection method can be used when the above-mentioned current and voltage detection cannot actually monitor the operation of the air conditioner. The outdoor temperature factor is involved in the calculation, so as to identify possible non-routine detection faults such as dust accumulation in the heat dissipation system, too little refrigerant, whether the used space does not match the nominal, and unreasonable installation pipelines.

The above descriptions are only preferred implementations of the present invention, and the present invention is not limited to the above-mentioned implementations, as long as the technical solutions that achieve the purpose of the present invention by basically the same means fall within the protection scope of the present invention.

Claims (6)

1. a kind of air-conditioning diagnoses detection system, it is characterised in that: including main control MCU, coding/decoding module, analog-digital converter, infrared Receiver, temperature sensor, electric-quantity monitoring chip, the main control MCU, analog-digital converter, coding/decoding module are successively electrically connected, mould Number converter and infrared remote receiver are electrically connected, and infrared remote receiver is used to obtain the infrared letter of set temperature of air-conditioning remote control sending Number, which converts through analog-digital converter, coding/decoding module decodes set temperature and send to main control MCU, temperature sensor For detecting indoor environment temperature locating for air-conditioning and feeding back to main control MCU, electric-quantity monitoring chip is used to detect the power consumption number of air-conditioning According to and feed back to main control MCU, which includes voltage and current, and main control MCU is according to the indoor environment temperature, setting temperature The relationship of degree and power consumption data calculates the fault type of air-conditioning；

The main control MCU calculates the algorithm of air-conditioning fault type are as follows: when the predetermined temperature amplitude that reduces actually is reducing temperature amplitude ± 20% range in, as work normally, be otherwise abnormal work；Wherein, practical to reduce temperature amplitude=F (t30)-F (t0), F (t0) is starting room temperature, and F (t30) is room temperature after 30 minutes "；It is predetermined to reduce temperature amplitude=(∑_t30-t0 (voltage v* electric current a)) * Energy Efficiency Ratio B/ (spatial area A* initial temperature coefficient of refrigerating performance R* power factor C), v are from 0 to 30 minute Interior voltage value, a be from 0 to 30 minute in current value；C is power factor Cos ￠, is set as 0.80, according to inductive load Calculating current, calculation formula are I=(P/U)/Cos ￠；A is nominal use space, and B is nominal Energy Efficiency Ratio, and R is initial temperature system Cold coefficient, i.e. starting outdoor temperature coefficient of refrigerating performance corresponding with starting room temperature.

2. a kind of air-conditioning according to claim 1 diagnoses detection system, it is characterised in that: it further includes cell phone application, cloud clothes Business device, the main control MCU extract the manufacturer's information and type information of air-conditioning remote control from decoded set temperature infrared signal, And it is uploaded to Cloud Server, Cloud Server is associated with code database and is transferred out in code database according to manufacturer's information and type information The cell phone application of this management system, cell phone application are fed back to main control MCU or are added to remote controller key information, remote controller key information For directly exporting remote controller key information command to main control MCU or indirectly by Cloud Server output remote controller key information It instructs to main control MCU, main control MCU controls infrared transmitter transmitting infrared signal to air-conditioning.

3. a kind of air-conditioning according to claim 2 diagnoses detection system, it is characterised in that: the Cloud Server is also used to mention It takes neural network forecast weather data and feeds back to main control MCU, which has outdoor temperature will so as to main control MCU Outdoor temperature is added in the algorithm for calculating air-conditioning fault type.

4. a kind of air-conditioning according to claim 2 diagnoses detection system, it is characterised in that: the code database includes self-built red Outer code library and/or third party's code library.

5. a kind of air-conditioning according to claim 2 diagnoses detection system, it is characterised in that: the cell phone application is in master control It is communicated by WiFi with main control MCU when local area network where MCU.

6. a kind of air-conditioning according to claim 1 diagnoses detection system, it is characterised in that: what the air-conditioning remote control issued Set temperature infrared signal includes frame head, manufacturer's information and type information, key fields, postamble.