Car air conditioning fault feedback system based on Internet of Things

Abstract

The present invention relates to the field of vehicle air conditioning, and in particular to a vehicle air conditioning fault feedback system based on the Internet of Things, comprising a data acquisition module for collecting vehicle interior temperature and vehicle exterior temperature, collecting ventilation flow of a vehicle air conditioning ventilation duct, and collecting air conditioning setting information, a data storage module for storing the collected data, an Internet of Things module for transmitting information, a fault analysis module for determining whether a single operation of the vehicle air conditioning meets a preset standard based on a thermal response rate under a heating fault detection strategy, and determining whether a single operation of the vehicle air conditioning meets a preset standard based on a cold response rate under a cooling fault detection strategy, and an information display module for displaying the determination result of the fault analysis module, thereby improving the accuracy of vehicle air conditioning fault warning.

Description

Technical Field

[0001] The present invention relates to the field of vehicle air conditioning, and in particular to a vehicle air conditioning fault feedback system based on the Internet of Things. Background Art

[0002] The air conditioner for new energy vehicles is mainly powered by a battery pack. When heating, it uses a PTC heating device, which obtains direct current from the vehicle battery and installs a centrifugal fan or axial flow fan to heat the vehicle. When cooling, an electric compressor is used to drive the refrigerant circulation, thereby achieving the adjustment of the cooling in the vehicle. Compared with traditional fuel vehicles, the air conditioner for new energy vehicles does not rely on the operation of the engine to provide power, so the air conditioning system can still work normally when the vehicle is stationary or driving at low speed.

[0003] Chinese patent publication number: CN115416441A, discloses a vehicle air conditioner and a fault detection method thereof, including a refrigerant circulation loop, on which a compressor, an outdoor heat exchanger, a throttling component and an indoor heat exchanger are arranged, and an outdoor heat exchange fan and an indoor heat exchange fan are arranged near the outdoor heat exchanger and the indoor heat exchanger, respectively, and the indoor heat exchange fan supplies air to the interior of the vehicle through the indoor air outlet. However, the above scheme only roughly determines the fault range of the vehicle air conditioner by obtaining the outdoor temperature and the air outlet temperature of the indoor air outlet, and the accuracy of its fault feedback is poor. Summary of the invention

[0004] To this end, the present invention provides a vehicle air-conditioning fault feedback system based on the Internet of Things, so as to overcome the problem of poor accuracy of fault feedback caused by roughly determining the fault range of the vehicle air-conditioning only by obtaining the outside temperature of the vehicle and the air outlet temperature of the air outlet in the vehicle in the prior art.

[0005] To achieve the above object, the present invention provides a vehicle air conditioning fault feedback system based on the Internet of Things, comprising:

[0006] A data acquisition module connected to the vehicle air conditioner, comprising a first acquisition unit for collecting the temperature inside the vehicle and the temperature outside the vehicle, a second acquisition unit for collecting the ventilation flow of the ventilation duct of the vehicle air conditioner, and a third acquisition unit for collecting the air conditioner setting information, wherein the setting information includes a set mode, a set temperature and a set ventilation flow;

[0007] A data storage module, connected to the data acquisition module, for storing information collected by the data acquisition module;

[0008] An Internet of Things module, which is connected to the data acquisition module and the data storage module respectively, for transmitting information;

[0009] A fault analysis module is connected to the Internet of Things module.

[0010] It is used to determine that the single operation of the vehicle air conditioner does not meet the preset standard according to the thermal response rate under the heating fault detection strategy, and determine that the reason for not meeting the preset standard is a heater thermistor failure, or, combined with the continuity of the ventilation flow of the ventilation duct, determine the reason why the single operation of the vehicle air conditioner does not meet the preset standard.

[0011] It is also used to record the single start as a first-level fault start when it is determined that the single operation of the vehicle air conditioner does not meet the preset standard according to the cold response rate under the cooling fault detection strategy, or to determine the fault start level of the single start in combination with the overcooling amplitude of the start, and to determine whether the cooling operation of the vehicle air conditioner meets the preset standard according to the frequency of fault starts within a preset period and the proportion of each fault start level;

[0012] An information display module is connected to the fault analysis module and is used to display the determination result of the fault analysis module.

[0013] Furthermore, the fault analysis module determines the fault detection strategy according to the mode set by the vehicle air conditioner, wherein the heating fault detection strategy is performed when the mode is a warm air mode, and the cooling fault detection strategy is performed when the mode is a cold air mode.

[0014] Furthermore, the thermal response rate is determined based on a set temperature, a set ventilation flow rate, an in-vehicle temperature and a hot air response time.

[0015] Furthermore, the fault analysis module determines the reason why a single operation of the vehicle air conditioner does not meet the preset standard according to the continuity of the ventilation flow of the ventilation duct, wherein:

[0016] If the ventilation flow rate of the ventilation duct is continuous, it is determined that the reason for not meeting the preset standard is that the circuit operation of the heater does not meet the standard and a warning of heater circuit failure is issued;

[0017] If the ventilation flow in the ventilation duct is intermittent, it is determined that the reason for not meeting the preset standard is that the fan operation is not up to standard and a fan failure warning is issued.

[0018] Furthermore, the cold response rate is determined based on a set temperature, a set ventilation flow rate, an in-vehicle temperature and a cold wind response duration.

[0019] Further, the fault analysis module determines the fault start level of the single startup according to the overcooling amplitude of the single startup, wherein the single startup is recorded as a second-level fault start according to the judgment result that the overcooling amplitude is less than a preset amplitude threshold, and the single startup is recorded as a first-level fault start according to the judgment result that the overcooling amplitude is greater than or equal to the preset amplitude threshold.

[0020] Furthermore, the fault analysis module determines whether the cooling operation of the vehicle air conditioner meets the preset standard according to the frequency of fault activation within a preset period and the proportion of each fault activation level, wherein:

[0021] If the frequency of the fault startup is less than the preset frequency threshold, the fault analysis module determines that the cooling operation of the vehicle air conditioner meets the preset standard and continues to monitor the vehicle air conditioner;

[0022] If the frequency of fault activation is greater than or equal to the preset frequency threshold and the frequency ratio of the second-level fault activation is higher than the frequency ratio of the first-level fault activation, the fault analysis module determines that the cooling operation of the vehicle air conditioner does not meet the preset standard, and determines the reason why the cooling operation of the vehicle air conditioner does not meet the preset standard according to the ventilation flow of the ventilation duct;

[0023] If the frequency of fault startup is greater than or equal to the preset frequency threshold and the frequency ratio of the first-level fault startup is higher than the frequency ratio of the second-level fault startup, the fault analysis module determines that the cooling operation of the vehicle air conditioner does not meet the preset standard and the reason for not meeting the preset standard is that the compressor operation does not meet the standard, and the fault analysis module issues a warning of compressor operation failure.

[0024] Furthermore, the fault analysis module determines the reason why the cooling operation of the vehicle air conditioner does not meet the preset standard, including:

[0025] Under the condition that the ventilation flow rate is less than a preset ventilation flow rate threshold, it is determined that the reason for not meeting the preset standard is that the air conditioning filter is clogged, and an air conditioning filter clogged warning is issued; and under the condition that the ventilation flow rate is greater than or equal to the preset ventilation flow rate threshold, it is determined that the reason for not meeting the preset standard is that the air conditioning radiator is not operating up to standard, and an air conditioning radiator failure warning is issued.

[0026] Further, the fault analysis module starts to correct the judgment criterion based on the judgment result that the vehicle exterior temperature is greater than a preset correction temperature, wherein the judgment criterion includes a first preset cold response rate and a second preset cold response rate.

[0027] Furthermore, the correction amplitude of the determination reference is positively correlated with the temperature correction difference, wherein the temperature correction difference is the difference between the outside temperature and the preset correction temperature.

[0028] Compared with the prior art, the beneficial effect of the present invention is that the system of the present invention sets up a heating fault detection strategy and a cooling fault detection strategy, and accurately determines the fault type of the vehicle air conditioner by monitoring the thermal response rate and the cold response rate during a single startup process.

[0029] Furthermore, the present invention can monitor heater circuit faults, fan faults, compressor operation faults, air conditioning filter element faults and air conditioning radiator faults. The monitoring locations of vehicle air conditioning faults are accurate and the types of faults are diverse.

[0030] Furthermore, the cold response rate and the hot response rate are determined based on the set temperature, the set ventilation flow rate, the vehicle interior temperature and the hot air response time or the cold air response time, so as to accurately evaluate the operating status of the vehicle air conditioner when the vehicle air conditioner is cooling or heating.

[0031] Furthermore, under the refrigeration fault detection strategy, the present invention accurately determines the fault cause when the refrigeration operation of the vehicle air conditioner does not meet the standard according to the frequency of fault activation within a preset period and the proportion of each fault activation level.

[0032] Furthermore, under the refrigeration fault detection strategy, the present invention also corrects the determination criterion when the outside temperature of the vehicle is greater than a preset temperature, thereby optimizing the determination criterion and improving the accuracy of monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of the structure of a vehicle air-conditioning fault feedback system based on the Internet of Things according to an embodiment of the present invention;

[0034] Figure 2 A flow chart of determining whether a single operation of a vehicle air conditioner meets a preset standard based on a thermal response rate according to an embodiment of the present invention;

[0035] Figure 3 This is a flow chart of an embodiment of the present invention for determining the reason why a single operation of the vehicle air conditioner does not meet a preset standard according to the continuity of the ventilation flow rate;

[0036] Figure 4 The present invention is a flow chart of determining whether a single operation of a vehicle air conditioner meets a preset standard based on a cold response rate according to an embodiment of the present invention. DETAILED DESCRIPTION

[0037] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0038] Those skilled in the art will appreciate that the system of the present invention may determine a single parameter by selecting the value with the highest proportion as the preset standard parameter based on data distribution, using weighted summation to take the obtained value as the preset standard parameter, substituting each historical data into a specific formula and taking the value obtained by using the formula as the preset standard parameter, or other selection methods, as long as the system of the present invention can clearly define different specific situations in a single determination process through the obtained values.

[0039] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0040] See also Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, they are respectively a structural schematic diagram of a vehicle air-conditioning fault feedback system based on the Internet of Things according to an embodiment of the present invention; a flowchart of determining whether a single operation of the vehicle air-conditioning meets the preset standard based on the thermal response rate according to an embodiment of the present invention; a flowchart of determining the reason why a single operation of the vehicle air-conditioning does not meet the preset standard according to the continuity of the ventilation flow according to an embodiment of the present invention; a flowchart of determining whether a single operation of the vehicle air-conditioning meets the preset standard based on the cold response rate according to an embodiment of the present invention.

[0041] An embodiment of the present invention provides a vehicle air conditioning fault feedback system based on the Internet of Things, including:

[0042] A data acquisition module connected to the vehicle air conditioner, comprising a first acquisition unit for collecting the temperature inside the vehicle and the temperature outside the vehicle, a second acquisition unit for collecting the ventilation flow of the ventilation duct of the vehicle air conditioner, and a third acquisition unit for collecting the air conditioner setting information, wherein the setting information includes a set mode, a set temperature and a set ventilation flow;

[0043] A data storage module, connected to the data acquisition module, for storing information collected by the data acquisition module;

[0044] An Internet of Things module, which is connected to the data acquisition module and the data storage module respectively, for transmitting information;

[0045] A fault analysis module is connected to the Internet of Things module.

[0046] It is used to determine that the single operation of the vehicle air conditioner does not meet the preset standard according to the thermal response rate under the heating fault detection strategy, and determine that the reason for not meeting the preset standard is a heater thermistor failure, or, combined with the continuity of the ventilation flow of the ventilation duct, determine the reason why the single operation of the vehicle air conditioner does not meet the preset standard.

[0047] It is also used to record the single start as a first-level fault start when it is determined that the single operation of the vehicle air conditioner does not meet the preset standard according to the cold response rate under the cooling fault detection strategy, or to determine the fault start level of the single start in combination with the overcooling amplitude of the start, and to determine whether the cooling operation of the vehicle air conditioner meets the preset standard according to the frequency of fault starts within a preset period and the proportion of each fault start level;

[0048] An information display module is connected to the fault analysis module and is used to display the determination result of the fault analysis module.

[0049] Specifically, the data storage module, such as a memory card, is not specifically limited and is used to store the information collected by the data collection module.

[0050] Specifically, the fault analysis module, such as a PLC, is not specifically limited and only needs to output a corresponding determination result based on the input parameters.

[0051] Specifically, the fault analysis module determines the fault detection strategy according to the mode set by the vehicle air conditioner, wherein the heating fault detection strategy is performed when the mode is the warm air mode, and the cooling fault detection strategy is performed when the mode is the cold air mode.

[0052] Specifically, the fault analysis module determines whether a single operation of the vehicle air conditioner meets a preset standard based on the thermal response rate under the condition of the heating fault detection strategy, wherein:

[0053] If the thermal response rate is less than the first preset thermal response rate of 1.2°C / min, the fault analysis module determines that the single operation of the vehicle air conditioner does not meet the preset standard and determines that the reason for not meeting the preset standard is a heater thermistor failure;

[0054] If the thermal response rate is greater than or equal to the first preset thermal response rate and less than the second preset thermal response rate of 1.8°C / min, the fault analysis module determines that the single operation of the vehicle air conditioner does not meet the preset standard, and determines the reason why the single operation of the vehicle air conditioner does not meet the preset standard based on the continuity of the ventilation flow of the ventilation duct;

[0055] If the thermal response rate is greater than or equal to the second preset thermal response rate, the fault analysis module determines that the single operation of the vehicle air conditioner meets the preset standard and continues to monitor the vehicle air conditioner;

[0056] Specifically, the thermal response rate is determined based on the set temperature, the set ventilation flow rate, the temperature inside the vehicle and the hot air response time, wherein the thermal response rate is calculated according to the following formula:

[0057] ,

[0058] In the formula, V H is the thermal response rate, T1 is the set temperature, T0 is the temperature inside the vehicle, N is the set ventilation flow rate, N m is the rated ventilation flow rate, t H is the hot air response time, wherein the hot air response time is the time it takes for the temperature inside the vehicle to rise from T0 to T1.

[0059] Specifically, the fault analysis module determines the reason why a single operation of the vehicle air conditioner does not meet the preset standard according to the continuity of the ventilation flow of the ventilation duct, wherein:

[0060] If the ventilation flow rate of the ventilation duct is continuous, it is determined that the reason for not meeting the preset standard is that the circuit operation of the heater does not meet the standard and a warning of heater circuit failure is issued;

[0061] If the ventilation flow in the ventilation duct is intermittent, it is determined that the reason for not meeting the preset standard is that the fan operation does not meet the standard and a fan failure warning is issued. It can be understood that the continuity or discontinuity of the ventilation flow can be measured based on the change of the ventilation flow. If the ventilation flow is maintained in a flow range, the ventilation flow is determined to be continuous. If the ventilation flow is zero and the duration of zero exceeds the preset time, the ventilation flow is determined to be intermittent. The flow range is not limited and can be set according to the actual situation of the vehicle air conditioner. The preset time is also not limited and can be set according to the actual situation of the vehicle air conditioner.

[0062] Specifically, the fault analysis module determines whether a single operation of the vehicle air conditioner meets the preset standard based on the cold response rate under the condition of the refrigeration fault detection strategy, wherein:

[0063] If the cold response rate is less than the first preset cold response rate of 0.85°C / min, the fault analysis module determines that the single operation of the vehicle air conditioner does not meet the preset standard, and records the single start as a first-level fault start;

[0064] If the cold response rate is greater than or equal to the first preset cold response rate and less than the second preset cold response rate of 1.40°C / min, the fault analysis module determines that the single operation of the vehicle air conditioner does not meet the preset standard, and determines the fault start level of the single start according to the overcooling amplitude of the start;

[0065] If the cold response rate is greater than or equal to the second preset cold response rate, the fault analysis module determines that the single operation of the vehicle air conditioner meets the preset standard and continues to monitor the vehicle air conditioner;

[0066] Specifically, the cold response rate is determined based on the set temperature, the set ventilation flow rate, the temperature inside the vehicle and the cold wind response time, wherein:

[0067] The cold response rate is calculated according to the following formula:

[0068] ,

[0069] In the formula, V C is the cold response rate, T1 is the set temperature, T0 is the temperature inside the car, N is the set ventilation flow rate, N m is the rated ventilation flow rate, tC is the cold wind response time, wherein the cold wind response time is the time it takes for the temperature inside the vehicle to drop from T0 to T1.

[0070] Specifically, the fault analysis module determines the fault start level of a single start according to the overcooling amplitude of the start, wherein, under the condition that the overcooling amplitude is less than a preset amplitude threshold of 1.30°C, the single start is recorded as a second-level fault start, and, under the condition that the overcooling amplitude is greater than or equal to the preset amplitude threshold, the single start is recorded as a first-level fault start, wherein the overcooling amplitude is the temperature amplitude of the vehicle interior temperature after it drops from T0 to T1.

[0071] Specifically, the fault analysis module determines whether the cooling operation of the vehicle air conditioner meets the preset standard according to the frequency of fault activation and the proportion of each fault activation level within a preset period of 240 hours, wherein:

[0072] If the frequency of the fault startup is less than the preset frequency threshold of 0.52 times / h, the fault analysis module determines that the cooling operation of the vehicle air conditioner meets the preset standard and continues to monitor the vehicle air conditioner;

[0073] If the frequency of fault activation is greater than or equal to a preset frequency threshold and the frequency ratio of the second-level fault activation is higher than the frequency ratio of the first-level fault activation, the fault analysis module determines that the cooling operation of the vehicle air conditioner does not meet the preset standard, and determines the reason why the cooling operation of the vehicle air conditioner does not meet the preset standard according to the ventilation flow of the ventilation duct;

[0074] If the frequency of fault startup is greater than or equal to the preset frequency threshold and the frequency ratio of the first-level fault startup is higher than the frequency ratio of the second-level fault startup, the fault analysis module determines that the cooling operation of the vehicle air conditioner does not meet the preset standard and the reason for not meeting the preset standard is that the compressor operation does not meet the standard, and the fault analysis module issues a warning of compressor operation failure.

[0075] Specifically, the reason why the cooling operation of the vehicle air-conditioning does not meet the preset standards is determined based on the ventilation flow rate of the ventilation duct, wherein, under the condition that the ventilation flow rate is less than the preset ventilation flow rate threshold, the reason for not meeting the preset standards is that the air-conditioning filter is clogged and an air-conditioning filter clogged warning is issued, and, under the condition that the ventilation flow rate is greater than or equal to the preset ventilation flow rate threshold, the reason for not meeting the preset standards is that the operation of the air-conditioning radiator does not meet the standards and an air-conditioning radiator failure warning is issued, wherein the preset ventilation flow rate threshold is the rated ventilation flow rate of the vehicle air-conditioning, and the ventilation flow rate is the ventilation flow rate when it is set to the maximum ventilation flow rate. It can be understood that the rated ventilation flow rate and the ventilation flow rate when it is set to the maximum ventilation flow rate are not specifically limited, and they only need to be obtained according to the actual operating parameters of different vehicle air-conditioners.

[0076] Specifically, the fault analysis module starts to correct the judgment criteria of whether a single operation of the vehicle air conditioner meets the preset standard in response to the outside temperature being greater than the preset correction temperature of 37.50°C, wherein the judgment criteria include a first preset cold response rate and a second preset cold response rate.

[0077] Specifically, the correction amplitude of the judgment criterion is positively correlated with the temperature correction difference, wherein the temperature correction difference is the difference between the outside temperature and the preset correction temperature. It can be understood that the larger the temperature correction difference is, the greater the reduction amplitude of the judgment criterion is. The positive correlation is, for example, a linear positive correlation. The slope of the linear positive correlation can be set according to the actual operation of the vehicle air conditioner. There is no specific limitation. It only needs to satisfy that as the temperature correction difference increases, the judgment criterion decreases.

[0078] Specifically, the magnitude of the single correction of the first preset cold response rate and the second preset cold response rate is the same.

[0079] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. Car air conditioning fault feedback system based on the Internet of Things, It is characterized in that include: A data acquisition module connected to the vehicle air conditioner, comprising a first acquisition unit for collecting the temperature inside the vehicle and the temperature outside the vehicle, a second acquisition unit for collecting the ventilation flow of the ventilation duct of the vehicle air conditioner, and a third acquisition unit for collecting the air conditioner setting information, wherein the setting information includes a set mode, a set temperature and a set ventilation flow; A data storage module, connected to the data acquisition module, for storing information collected by the data acquisition module; An Internet of Things module, which is connected to the data acquisition module and the data storage module respectively, for transmitting information; A fault analysis module is connected to the Internet of Things module. Used to determine that the reason for not meeting the preset standard is a heater thermistor failure when determining that a single operation of the vehicle air conditioner does not meet the preset standard according to the thermal response rate under the heating fault detection strategy, or determine the reason for not meeting the preset standard in combination with the continuity of the ventilation flow of the ventilation duct, wherein, if the thermal response rate is less than a first preset thermal response rate, the fault analysis module determines that the single operation of the vehicle air conditioner does not meet the preset standard and determines that the reason for not meeting the preset standard is a heater thermistor failure; if the thermal response rate is greater than or equal to the first preset thermal response rate and less than the second preset thermal response rate, the fault analysis module determines that the single operation of the vehicle air conditioner does not meet the preset standard, and determines the reason for not meeting the preset standard according to the continuity of the ventilation flow of the ventilation duct; The fault analysis module determines the reason why a single operation of the vehicle air conditioner does not meet the preset standard according to the continuity of the ventilation flow of the ventilation duct, wherein if the ventilation flow of the ventilation duct is continuous, it is determined that the reason for not meeting the preset standard is that the circuit operation of the heater does not meet the standard and a warning of heater circuit failure is issued; if the ventilation flow of the ventilation duct is intermittent, it is determined that the reason for not meeting the preset standard is that the fan operation does not meet the standard and a warning of fan failure is issued; It is also used to record the single start as a first-level fault start when it is determined according to the cold response rate that the single operation of the vehicle air conditioner does not meet the preset standard under the refrigeration fault detection strategy, or determine the fault start level of the single start in combination with the overcooling amplitude of the start, wherein, if the cold response rate is less than the first preset cold response rate, the fault analysis module determines that the single operation of the vehicle air conditioner does not meet the preset standard, and records the single start as a first-level fault start; if the cold response rate is greater than or equal to the first preset cold response rate and less than the second preset cold response rate, the fault analysis module determines that the single operation of the vehicle air conditioner does not meet the preset standard, and determines the fault start level of the single start according to the overcooling amplitude of the start; The fault analysis module determines the fault start level of the single start according to the overcooling amplitude of the start, wherein the single start is recorded as a second-level fault start under the condition that the overcooling amplitude is less than a preset amplitude threshold, and the single start is recorded as a first-level fault start under the condition that the overcooling amplitude is greater than or equal to the preset amplitude threshold; And, to determine whether the cooling operation of the vehicle air conditioner meets the preset standard according to the frequency of fault activation and the proportion of each fault activation level within a preset period; Performing a heating fault detection strategy when the mode is a warm air mode, and performing a cooling fault detection strategy when the mode is a cold air mode; An information display module is connected to the fault analysis module and is used to display the determination result of the fault analysis module.

2. According to the vehicle air conditioning fault feedback system based on the Internet of Things according to claim 1, It is characterized in that The thermal response rate is determined based on the set temperature, the set ventilation flow rate, the temperature inside the vehicle and the hot air response time.

3. According to the vehicle air conditioning fault feedback system based on the Internet of Things according to claim 1, It is characterized in that The cold wind response rate is determined based on the set temperature, the set ventilation flow rate, the temperature inside the vehicle and the cold wind response time.

4. According to the Internet of Things-based vehicle air conditioning fault feedback system of claim 1, It is characterized in that The fault analysis module determines whether the cooling operation of the vehicle air conditioner meets the preset standard according to the frequency of fault activation within a preset period and the proportion of each fault activation level, wherein: If the frequency of the fault startup is less than the preset frequency threshold, the fault analysis module determines that the cooling operation of the vehicle air conditioner meets the preset standard and continues to monitor the vehicle air conditioner; If the frequency of fault activation is greater than or equal to the preset frequency threshold and the frequency ratio of the second-level fault activation is higher than the frequency ratio of the first-level fault activation, the fault analysis module determines that the cooling operation of the vehicle air conditioner does not meet the preset standard, and determines the reason why the cooling operation of the vehicle air conditioner does not meet the preset standard according to the ventilation flow of the ventilation duct; If the frequency of fault startup is greater than or equal to the preset frequency threshold and the frequency ratio of the first-level fault startup is higher than the frequency ratio of the second-level fault startup, the fault analysis module determines that the cooling operation of the vehicle air conditioner does not meet the preset standard and the reason for not meeting the preset standard is that the compressor operation does not meet the standard, and the fault analysis module issues a warning of compressor operation failure.

5. According to the Internet of Things-based vehicle air conditioning fault feedback system of claim 4, It is characterized in that The fault analysis module determines the reason why the cooling operation of the vehicle air conditioner does not meet the preset standard, including: Under the condition that the ventilation flow rate is less than a preset ventilation flow rate threshold, it is determined that the reason for not meeting the preset standard is that the air conditioning filter is clogged, and an air conditioning filter clogged warning is issued; and under the condition that the ventilation flow rate is greater than or equal to the preset ventilation flow rate threshold, it is determined that the reason for not meeting the preset standard is that the air conditioning radiator is not operating up to standard, and an air conditioning radiator failure warning is issued.

6. According to the Internet of Things-based vehicle air conditioning fault feedback system of claim 5, It is characterized in that The fault analysis module starts to correct the judgment reference based on the judgment result that the vehicle external temperature is greater than the preset correction temperature, wherein the judgment reference includes a first preset cold response rate and a second preset cold response rate.

7. According to claim 6, the vehicle air conditioning fault feedback system based on the Internet of Things, It is characterized in that The correction amplitude of the determination reference is positively correlated with the temperature correction difference, wherein the temperature correction difference is the difference between the vehicle outside temperature and the preset correction temperature.

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