CN115257281A - Parking air conditioner and its fluorine deficiency detection method, device and storage medium - Google Patents

Abstract

The application provides a parking air conditioner and a fluorine deficiency detection method, a fluorine deficiency detection device and a storage medium thereof, wherein the fluorine deficiency detection method of the parking air conditioner obtains an input voltage value, a working frequency and a working current value of a compressor in the parking air conditioner; determining a protection current threshold of the compressor according to the input voltage value; acquiring an internal environment temperature value and an internal coil temperature value, and calculating a temperature difference value between the internal environment temperature value and the internal coil temperature value; and if the working frequency of the compressor is greater than a preset frequency threshold value, the working current value is less than a protection current threshold value and the temperature difference value is less than a preset temperature difference threshold value, determining that the parking air conditioner is in a fluorine-lacking state. By acquiring the input voltage value of the compressor, and combining the input voltage value with the determined protection current threshold value, fluorine deficiency detection is carried out according to the working frequency, the working current value, the internal environment temperature value and the temperature difference value between the internal coil temperature values, and the accuracy of fluorine deficiency detection can be improved.

Description

Parking air conditioner and its fluorine deficiency detection method, device and storage medium

technical field

The present application relates to the technical field of air conditioning, and in particular to a parking air conditioner, a fluorine deficiency detection method, device, and a computer-readable storage medium (storage medium).

Background technique

The parking air conditioner refers to the continuous operation of the air conditioner through the battery or other driving power in the car to adjust and control the temperature, humidity, flow rate and other parameters of the ambient air in the car when parking, waiting and resting. Since the parking air conditioner is installed on the car, its working environment has long-term bumps and vibrations, and the welding points of the internal pipelines of the parking air conditioner are prone to breakage, resulting in different degrees of refrigerant in the parking air conditioner during use. leak. Refrigerant leakage leads to lack of fluorine, which will affect the cooling effect of the parking air conditioner in the slightest, and damage the compressor in severe cases.

Contents of the invention

Based on this, it is necessary to provide a method and device for detecting fluorine deficiency of a parking air conditioner, a parking air conditioner, and a storage medium for the above technical problems.

In a first aspect, the present application provides a method for detecting fluorine deficiency of a parking air conditioner, the method comprising:

Obtain the input voltage value, operating frequency and operating current value of the compressor in the parking air conditioner;

Determine the protection current threshold of the compressor according to the input voltage value;

Collect the internal ambient temperature value and the internal coil temperature value, and calculate the temperature difference between the internal ambient temperature value and the internal coil temperature value;

If the operating frequency of the compressor is greater than the preset frequency threshold, the operating current value is less than the protection current threshold and the temperature difference is smaller than the preset temperature difference threshold, it is determined that the parking air conditioner is in a fluorine-deficient state.

In some embodiments of the present application, determining the protection current threshold of the compressor according to the input voltage value includes:

Comparing the input voltage value with a preset high voltage threshold and a preset low voltage threshold;

If the input voltage value is greater than the preset high voltage threshold, the protection current threshold is determined as the first current value;

If the input voltage value is less than or equal to the high voltage threshold and greater than or equal to the low voltage threshold, determining the protection current threshold as the second current value;

If the input voltage value is less than the low voltage threshold, the protection current threshold is determined as the third current value.

In some embodiments of the present application, after the step of determining that the parking air conditioner is in a fluorine-deficient state, it further includes:

Control the compressor in the parking air conditioner and the external fan to shut down.

In some embodiments of the present application, after the compressor in the parking air conditioner and the external fan are controlled to shut down, it includes:

Update the shutdown times of the compressor;

If the shutdown times do not reach the preset shutdown times threshold, the compressor and the external fan are controlled to be started after the first period of time.

In some embodiments of the present application, after calculating the temperature difference between the internal ambient temperature value and the internal coil temperature value, it also includes:

If the operating frequency of the compressor is less than or equal to the preset frequency threshold, the operating current value is greater than or equal to the protection current threshold, or the temperature difference is less than or equal to the preset temperature difference threshold, obtain the working duration of the compressor;

If the working duration is longer than the preset duration threshold, the number of shutdown times of the compressor is reset to zero.

In some embodiments of the present application, updating the shutdown times of the compressor includes:

adding the number of times the compressor shuts down to a preset value to obtain a sum value; and

Update the value of the number of shutdowns of the compressor to the sum value.

In some embodiments of the present application, obtaining the input voltage value, operating frequency and operating current value of the compressor in the parking air conditioner includes:

Responding to the command to start the cooling mode, control and turn on the external fan in the parking air conditioner;

After the outdoor fan continues to work for a second period of time, the compressor of the parking air conditioner is controlled to be turned on;

After the compressor continues to work for a third period of time, the input voltage value, operating frequency and operating current value of the compressor in the parking air conditioner are obtained.

In a second aspect, the present application provides a fluorine deficiency detection device for a parking air conditioner, the device comprising:

The working parameter obtaining module is used to obtain the input voltage value, working frequency and working current value of the compressor in the parking air conditioner;

A protection current threshold determination module, configured to determine a protection current threshold of the compressor according to the input voltage value;

The temperature value acquisition module is used to collect the internal environment temperature value and the internal coil temperature value, and calculate the temperature difference between the internal environment temperature value and the internal coil temperature value;

A fluorine deficiency detection module, configured to determine that the compressor is parked when the operating frequency of the compressor is greater than a preset frequency threshold, the operating current value is less than the protection current threshold, and the temperature difference is less than a preset temperature difference threshold The air conditioner is in a fluorine-deficient state.

In a third aspect, the present application also provides a parking air conditioner, which includes:

one or more processors;

storage; and

One or more application programs, wherein the one or more application programs are stored in the memory and configured to be executed by the processor to implement the fluorine deficiency detection method of the parking air conditioner.

In a fourth aspect, the present application also provides a computer-readable storage medium, on which a computer program is stored, and the computer program is loaded by a processor to execute the steps in the method for detecting fluorine deficiency of a parking air conditioner.

In a fifth aspect, embodiments of the present application provide a computer program product or computer program, where the computer program product or computer program includes computer instructions, and the computer instructions are stored in a computer-readable storage medium. The processor of the computer device reads the computer instruction from the computer-readable storage medium, and the processor executes the computer instruction, so that the computer device executes the method provided by the first aspect above.

The method and device for detecting fluorine deficiency of the parking air conditioner, the parking air conditioner, and the storage medium are obtained by obtaining the input voltage value, operating frequency, and operating current value of the compressor in the parking air conditioner; Protection current threshold; collect the internal ambient temperature value and the internal coil temperature value, and calculate the temperature difference between the internal ambient temperature value and the internal coil temperature value; if the operating frequency of the compressor is greater than the preset frequency threshold and the operating current value is less than If the protection current threshold is set and the temperature difference is less than the preset temperature difference threshold, it is determined that the parking air conditioner is in a fluorine-deficient state. During the actual operation of the parking air conditioner, the total power remains unchanged. When the power supply voltage, that is, the input voltage value increases, the operating current of the compressor decreases. Conversely, when the power supply voltage, that is, the input voltage value decreases, the operating current of the compressor increases. big. Therefore, by obtaining the input voltage value of the compressor, combining the input voltage to determine the protection current threshold, and then according to the temperature difference between the operating frequency, operating current value, internal ambient temperature value, and internal coil temperature value and the preset frequency threshold The detection of fluorine deficiency can be carried out based on the size relationship between the protection current threshold and the set temperature difference threshold, which can improve the accuracy of fluorine deficiency detection.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can also be obtained based on these drawings without any creative effort.

FIG. 1 is a schematic diagram of a scene of a method for detecting fluorine deficiency of a parking air conditioner in an embodiment of the present application;

Fig. 2 is the schematic flow chart of the fluorine deficiency detection method of the parking air conditioner in the embodiment of the present application;

Fig. 3 is a schematic structural view of the parking air conditioner in the embodiment of the present application;

Fig. 4 is a schematic flow chart of another fluorine-deficiency detection method for a parking air conditioner in an embodiment of the present application;

Fig. 5 is a schematic structural view of the fluorine deficiency detection device of the parking air conditioner in the embodiment of the present application;

FIG. 6 is a schematic structural diagram of a computer device in an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of this application.

In the description of the present application, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of said features. In the description of the present application, "plurality" means two or more, unless otherwise specifically defined.

In the description of this application, the word "for example" is used to mean "serving as an example, illustration or illustration". Any embodiment described in this application as "such as" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is given to enable any person skilled in the art to make and use the invention. In the following description, details are set forth for purposes of explanation. It should be understood that one of ordinary skill in the art would recognize that the present invention may be practiced without the use of these specific details. In other instances, well-known structures and procedures are not described in detail to avoid obscuring the description of the present invention with unnecessary detail. Thus, the present invention is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed in this application.

The fluorine deficiency detection method of the parking air conditioner provided in the embodiment of the present application can be applied to the fluorine deficiency detection system of the parking air conditioner as shown in FIG. 1 . Wherein, the fluorine deficiency detection system of the parking air conditioner may include the parking air conditioner 100 and the fluorine deficiency detection terminal 200, specifically, the fluorine deficiency detection terminal 200 obtains the input voltage value of the compressor in the parking air conditioner 100, the working Frequency and working current value; determine the protection current threshold of the compressor according to the input voltage value; collect the internal ambient temperature value and the internal coil temperature value, and calculate the temperature difference between the internal ambient temperature value and the internal coil temperature value; if the compression If the operating frequency of the machine is greater than the preset frequency threshold, the operating current value is less than the protection current threshold, and the temperature difference is less than the preset temperature difference threshold, it is determined that the parking air conditioner 100 is in a fluorine-deficient state.

Those skilled in the art can understand that the application environment shown in Figure 1 is only an application scenario related to the solution of this application, and does not constitute a limitation on the application scenario of the solution of this application. More or less computer devices are shown, for example, only one parking air conditioner 100 is shown in FIG. It is not limited here. In addition, as shown in FIG. 1 , the fluorine deficiency detection system of the parking air conditioner may further include a memory for storing data, such as storing air-conditioning control parameters of different types of air-conditioning units.

It should also be noted that the scene diagram of the fluorine deficiency detection system of the parking air conditioner shown in FIG. The technical solution of the embodiment of the present invention does not constitute a limitation to the technical solution provided by the embodiment of the present invention. Those of ordinary skill in the art know that with the evolution of the fluorine deficiency detection system of the parking air conditioner and the emergence of new business scenarios, The technical solutions provided by the embodiments of the present invention are also applicable to similar technical problems.

Referring to FIG. 2 , an embodiment of the present application provides a fluorine-deficiency detection method for a parking air conditioner, which is mainly illustrated by applying the method to the fluorine-deficiency detection terminal 200 in FIG. 1 above. The method includes steps S210 to S240, details as follows:

S210. Obtain the input voltage value, operating frequency and operating current value of the compressor in the parking air conditioner.

The car is equipped with DC power sources such as batteries, and the DC power supplies power to the parking air conditioner through the power cord. It is understandable that the parking air conditioner can be powered by different DC power sources such as 12 volts, 24 volts, 36 volts, and 48 volts. . Wherein, the input voltage value refers to the voltage value actually input to the parking air conditioner when the battery or other driving power sources are used; specifically, a voltage detection module may be provided to obtain the input voltage value through the voltage detection module.

Wherein, the working frequency refers to the actual frequency of the compressor in the parking air conditioner when it is working, and the working current value refers to the actual current value of the compressor in the parking air conditioner when it is working and running under the corresponding input voltage.

Specifically, after the parking air conditioner is turned on and continues to work for a certain period of time, the current input voltage value, operating frequency and operating current value of the compressor in the parking air conditioner can be detected.

Further, in one embodiment, obtaining the input voltage value, operating frequency and operating current value of the compressor in the parking air conditioner includes: responding to the cooling mode start instruction, controlling to turn on the external fan in the parking air conditioner; After working continuously for a second period of time, control to turn on the compressor of the parking air conditioner; after the compressor continuously works for a third period of time, obtain the input voltage value, operating frequency and operating current value of the compressor in the parking air conditioner.

Wherein, the second duration and the third duration may be set according to actual conditions. Specifically, when receiving the instruction to start the cooling mode, the parking air conditioner is turned on in the cooling mode, and the outdoor fan is preferentially controlled to start, and the compressor is turned on after the outdoor fan continues to work for a second time, and after the compressor continues to work for a third time , and then obtain the input voltage value, operating frequency and operating current value of the compressor in the parking air conditioner, so as to perform subsequent fluorine deficiency detection according to the input voltage value, operating frequency and operating current value of the compressor. By controlling the start of the external fan prior to the compressor, the heat of the internal pipes of the parking air conditioner can be quickly taken away, and the temperature of the internal pipes of the parking air conditioner can be reduced, so that the entire parking air conditioner can achieve rapid cooling, reduce energy consumption, and increase The accuracy of fluorine deficiency detection, after the outdoor fan and compressor continue to work for a certain period of time, the refrigerant circulation in the parking air conditioner tends to be stable, and the accuracy of fluorine deficiency detection can be improved by performing fluorine deficiency detection at this time.

S220. Determine the protection current threshold of the compressor according to the input voltage value.

When the compressor is running with a lack of fluorine, the load of the compressor will decrease, and the working current of the compressor will decrease. The working current of the compressor in the parking air conditioner can be used to judge whether the compressor is running without fluorine. However, consider The parking air conditioner is often powered by DC power sources with different rated voltages such as 12V, 24V, 36V, 48V, etc. The actual input voltage to the parking air conditioner is quite different. Depending on the charging and discharging degree of the DC power supply, the actual input voltage value input to the parking air conditioner has a large fluctuation on the basis of the rated voltage of the DC power supply, and the difference in the input voltage value will also affect the working current of the compressor. If a uniform protection current threshold is used for fluorine deficiency detection, the accuracy of fluorine deficiency detection will be poor. Therefore, after the input voltage value is obtained, different protection current thresholds can be selected according to the input voltage value, so as to improve the accuracy of fluorine deficiency detection and reduce false detection of fluorine deficiency.

Among them, the total power of the parking air conditioner is often constant during the actual operation process. When the power supply voltage, that is, the input voltage value increases, the operating current of the compressor decreases. Conversely, when the input voltage value decreases, the operating current of the compressor decreases. Therefore, the protection current threshold is inversely proportional to the input voltage value. When the input voltage value is high, the protection current threshold can be set to a lower current value. When the input voltage value is high, the protection current threshold can be set to a lower value. high current value. For example, when the input voltage value is 22V, the protection current threshold can be set to 15A; for another example, when the input voltage value is 27V, the protection current threshold can be set to 10A.

Specifically, determining the protection current threshold of the compressor according to the input voltage value may be preset to construct a lookup table or an association relationship between different input voltage values and the protection current threshold; after obtaining the current input voltage value of the parking air conditioner , look up the corresponding protection current threshold from the lookup table according to the input voltage value, or obtain the protection current threshold corresponding to the actual input voltage value according to the pre-built correlation between the input voltage value and the protection current threshold.

Further, in one embodiment, determining the protection current threshold of the compressor according to the input voltage value may also include: comparing the input voltage value with a preset high voltage threshold and a preset low voltage threshold; if the input voltage value is greater than the preset If the high voltage threshold is set, the protection current threshold is determined as the first current value; if the input voltage value is less than or equal to the high voltage threshold and greater than or equal to the low voltage threshold, the protection current threshold is determined as the second current value; if the input voltage value If it is less than the low voltage threshold, the protection current threshold is determined as the third current value.

Among them, the corresponding high voltage threshold and low voltage threshold can be set in advance according to the rated voltage of the DC power supply for power supply, and then after the input voltage value is obtained, according to the magnitude relationship between the input voltage value and the high voltage threshold and the low voltage threshold, determine The protection current threshold of the compressor; specifically, when the input voltage value is greater than the preset high voltage threshold, the protection current threshold can be set to the first current value; when the input voltage value is less than or equal to the high voltage threshold and greater than or equal to the low voltage threshold , the protection current threshold can be set to the second current value, and when the input voltage value is less than the low voltage threshold, the protection current threshold can be set to the third current value. Wherein, the values of the first current value, the second current value and the third current value increase sequentially.

For example, the high voltage threshold can be set to 27 volts, and the low voltage threshold can be set to 22 volts. When the input voltage value is greater than 27 volts, the protection current threshold can be set to 10 amps; when the input voltage value is less than or equal to 27 volts, and greater than or equal to 22 volts, the protection current threshold can be set to 12 amps; when the input voltage value is less than 22 volts, the protection current threshold can be set to 15 amps.

S230. Collect the internal ambient temperature value and the internal coil temperature value, and calculate the temperature difference between the internal ambient temperature value and the internal coil temperature value.

Specifically, an internal ambient temperature sensor and an internal coil temperature sensor can be installed on the indoor unit of the parking air conditioner, and then the indoor ambient temperature value at the current moment can be detected in real time through the internal ambient temperature sensor and the internal coil temperature sensor The controller collects the internal coil temperature value at the current moment in real time, and calculates the temperature difference between the internal ambient temperature value and the internal coil temperature value.

It can be understood that the temperature difference between the internal ambient temperature value and the internal coil temperature value can reflect whether the parking air conditioner is working normally. In the cooling mode, the internal coil temperature value is the lowest temperature that the parking air conditioner can cool. If the difference between the internal ambient temperature value and the internal coil temperature value is large, it can indicate that the parking air conditioner is working normally and there is no shortage of fluorine; As a judgment condition for fluorine deficiency detection, it can effectively improve the accuracy of fluorine deficiency detection.

S240, if the operating frequency of the compressor is greater than the preset frequency threshold, the operating current value is less than the protection current threshold, and the temperature difference is less than the preset temperature difference threshold, determine that the parking air conditioner is in a fluorine-deficient state.

Among them, the preset frequency threshold can be set as the reference operating frequency of the parking air conditioner in the non-fluorine-deficiency state, and by comparing the operating frequency with the preset frequency threshold, it is ensured that the compressor is in a normal working state during the fluorine-deficiency detection process lower; the preset temperature difference threshold can be set to the minimum value of the temperature difference between the temperature that the parking air conditioner can cool and the indoor environment in the cooling mode of the parking air conditioner in the non-fluorine-deficient state. The threshold value is compared to realize the detection of fluorine deficiency in the dimension of temperature. Specifically, in one embodiment, the preset frequency threshold may be set to 35 Hz, and the preset temperature difference threshold may be set to 3 degrees Celsius.

After obtaining the operating frequency of the compressor, the operating current value of the compressor, and the temperature difference between the internal environment temperature value and the internal coil temperature value, it can be based on the operating frequency of the compressor, the operating current of the compressor, and the internal environment The temperature difference between the temperature value and the inner coil temperature value is used to detect the lack of fluorine. Specifically, the frequency threshold and the temperature difference threshold can be preset. When the operating frequency of the compressor is greater than the preset frequency threshold, the operating current value is less than the protection current threshold, and the temperature difference is less than the preset temperature difference threshold, it is determined that the parking air conditioner is fluorine-deficient. state.

In one embodiment, after it is determined that the parking air conditioner is in a fluorine-deficient state, the compressor and the external fan in the parking air conditioner are controlled to shut down. Specifically, when it is determined that the parking air conditioner is in a state of fluorine deficiency, the compressor and the external fan in the parking air conditioner are turned off to avoid damage to the compressor caused by continuous operation of the compressor in a state of fluorine deficiency.

Further, the viscosity of the refrigerant becomes higher when the temperature is higher, leading to a misjudgment of the state of fluorine deficiency; therefore, in one embodiment, the refrigerant in the compressor of the parking air conditioner controls the compressor in the parking air conditioner and After the external fan is shut down, it includes: updating the number of shutdowns of the compressor; if the number of shutdowns does not reach the preset threshold of shutdown times, the compressor and the external fan are controlled to be started after the first period of time.

Among them, the number of shutdowns of the compressor is used to reflect the number of times that the parking air conditioner is judged to be in a state of fluorine deficiency; the statistics of the number of shutdowns of the compressor can be counted in an accumulative manner, or can be counted in an accumulative manner. Then the selected preset abnormal number is greater than the initial value of the abnormal number. Correspondingly, different counting methods are used, and the threshold value of the preset shutdown times is different. For example, when the statistics of the shutdown times of the compressor are counted in an accumulative manner, the initial value of the compressor shutdown times can be set is zero, the preset shutdown times threshold can be selected as the maximum number of times the parking air conditioner can withstand under cooling conditions, for example, the preset shutdown times threshold can be set to 3, that is, the number of compressor shutdowns is accumulated to 3, Then it can be confirmed that the parking air conditioner is in a fluorine-deficient state; when the statistics of the shutdown times of the compressor are counted in a cumulative manner, the initial value of the compressor shutdown times can be set as the parking air conditioner in the cooling condition The maximum number of times that can be tolerated, the preset shutdown times threshold can be set to zero, that is, the number of shutdowns of the compressor is reduced to 0, then it can be confirmed that the parking air conditioner is in a fluorine-deficient state.

In one embodiment, updating the number of shutdown times of the compressor may specifically include: adding the number of shutdown times of the compressor to a preset value to obtain a sum value; and updating the value of the number of shutdown times of the compressor to sum value. Among them, the purpose of adding and subtracting the value of the number of shutdown times of the compressor is to make the number of shutdown times reach the preset threshold; specifically, when the number of shutdown times is updated by accumulating, the preset value can be 1, and when using The number of shutdowns is updated in an accumulative and subtractive manner, and the preset value can be negative 1, which is not limited here.

Specifically, after updating the shutdown times of the compressor, the shutdown times are compared with the preset shutdown times threshold, and if the shutdown times are smaller than the preset shutdown times threshold, it is determined that the parking air conditioner is in a fluorine-deficient state There is a possibility of misjudgment, restart the compressor and the external fan after the first time.

Further, if the shutdown times are equal to or greater than the preset shutdown times threshold, that is, the shutdown times are equal to or greater than the preset shutdown times threshold, it is determined that the parking air conditioner is in a fluorine-deficient state, and the compressor and the external fan are shut down. , and a fluorine shortage warning message is issued.

In the fluorine deficiency detection method of the above-mentioned parking air conditioner, the input voltage value, operating frequency and operating current value of the compressor in the parking air conditioner are obtained; the protection current threshold of the compressor is determined according to the input voltage value; the internal environment temperature value and The internal coil temperature value, and calculate the temperature difference between the internal ambient temperature value and the internal coil temperature value; if the operating frequency of the compressor is greater than the preset frequency threshold, the operating current value is less than the protection current threshold and the temperature difference is less than the preset The temperature difference threshold is used to determine that the parking air conditioner is in a fluorine-deficient state. During the actual operation of the parking air conditioner, the total power remains unchanged. When the power supply voltage, that is, the input voltage value increases, the operating current of the compressor decreases. Conversely, when the power supply voltage, that is, the input voltage value decreases, the operating current of the compressor increases. big. Therefore, by obtaining the input voltage value of the compressor, combining the input voltage to determine the protection current threshold, and then according to the temperature difference between the operating frequency, operating current value, internal ambient temperature value, and internal coil temperature value and the preset frequency threshold The detection of fluorine deficiency can be carried out based on the size relationship between the protection current threshold and the set temperature difference threshold, which can improve the accuracy of fluorine deficiency detection.

Further, in one embodiment, after calculating the temperature difference between the internal environment temperature value and the internal coil temperature value, it also includes: if the operating frequency of the compressor is less than or equal to the preset frequency threshold, and the operating current value is greater than or equal to If the protection current threshold or the temperature difference is less than or equal to the preset temperature difference threshold, the working duration of the compressor is obtained; if the working duration is greater than the preset duration threshold, the compressor shutdown times are reset to zero.

Specifically, if the operating frequency of the compressor is less than or equal to the preset frequency threshold, the operating current value is greater than or equal to the protection current threshold, or the temperature difference is less than or equal to the preset temperature difference threshold, it is determined that the parking air conditioner is not in a fluorine-deficient state and is normal. At this time, you can obtain the working duration of the compressor in the parking air conditioner since it was shut down and restarted last time. When the working duration is longer than the preset duration threshold, it can be determined that the compressor is not in a state of fluorine deficiency. The number of shutdowns of the compressor is reset to zero, reducing the misjudgment of fluorine deficiency detection and improving the accuracy of fluorine deficiency detection.

The method for detecting fluorine deficiency of the above-mentioned parking air conditioner will be further described below in conjunction with specific application scenarios. Referring to Fig. 3, the transport truck is equipped with a storage battery, and the storage battery supplies power to the parking air conditioner through the power line. Wherein, the parking air conditioner is at least provided with an air conditioner controller, a voltage detection module, a compressor operating parameter detection module, a temperature detection module, an air conditioner drive module, a fluorine shortage alarm module, and a network connection module; specifically, the air conditioner controller is used to communicate with the voltage The detection module, the temperature detection module, the air conditioner drive module, the lack of fluorine alarm module and the network connection module are connected.

Among them, the functions of each module are as follows:

The voltage detection module is used to detect the input voltage value;

The compressor working parameter detection module is used to detect the working circuit and working frequency of the compressor;

The air conditioner drive module is used to receive the control parameters sent by the air conditioner controller to control the operation of actuators such as compressors, internal fans, and external fans, so as to control the parking air conditioner to operate in cooling mode or heating mode;

The temperature detection module is connected with a plurality of temperature sensors, and is used to receive temperature parameters such as internal ambient temperature and internal coil temperature detected by each temperature sensor and send them to the air conditioner controller; wherein, the temperature sensors include at least an internal ambient temperature sensor, an internal Coil temperature sensor and external environment sensor;

The fluorine deficiency alarm module includes a display module and/or a voice module, the display module can be used to display failure information such as fluorine deficiency, and the voice module can be used to broadcast failure information such as fluorine deficiency;

The network connection module includes at least a Wifi module; the network connection module can be used to transmit fault information to the air conditioner after-sales service platform, remind the after-sales personnel to receive orders in time, and perform maintenance work for users.

Specifically, as shown in FIG. 4, when the user turns on the parking air conditioner in cooling mode, the parking air conditioner can operate according to the following steps:

S410, responding to the cooling mode start instruction, controlling to turn on the external fan in the parking air conditioner.

S420, after the outdoor fan continues to work for a second period of time, control to turn on the compressor of the parking air conditioner.

Wherein, the compressor of the parking air conditioner is started after the outdoor fan runs for a second period of time.

S430. Acquire the input voltage value, the operating current value, and the operating frequency of the compressor, and acquire the internal environment temperature value and the internal coil temperature value after the compressor continues to work for a third period of time.

Among them, after the compressor runs for the third time, the air conditioner controller obtains the current input voltage value U through the voltage detection module, and obtains the internal environment temperature value T through the temperature detection module. The _{inner ring} and the inner coil temperature value T of the inner heat exchanger _{The inner tube} obtains the operating frequency F of the compressor and the operating current value I _compressor of the compressor through the compressor operating parameter detection module.

S440, judging whether the input voltage value, the working current value, the working frequency, the internal environment temperature value and the internal coil temperature value meet the fluorine deficiency judgment condition; if yes, execute S450; if not, execute S490.

Among them, after the air conditioner controller obtains the input voltage value U, the internal environment temperature value T _{inner ring} , the inner coil temperature value T _{inner tube} , the operating frequency F and the operating current value I of the _compressor , it performs fluorine deficiency detection according to these parameters.

Specifically, the conditions for judging fluorine deficiency are as follows:

1) The operating frequency of the compressor F≥F _preset ; where, F _preset can be set to 35 Hz;

2) The operating current I compressor of the _compressor ≤ the protection current threshold I _preset ;

Among them, take the 24V power supply voltage as an example: when the input voltage value U ≤ preset low voltage threshold (for example, the preset low voltage threshold can be set to 22V), the _preset protection current threshold I can be set to 15A; when the input voltage value U ≥ Preset high voltage threshold (for example, the preset high voltage threshold can be set to 27V), and the _preset protection current threshold I can be set to 10A;

3) T _{inner ring} -T _{inner tube} ≤ △T _{preset temperature} ; wherein, △T _{preset temperature} can be set to 3°C.

S450, enter the fluorine-deficiency protection state, control the compressor in the parking air conditioner and the external fan to shut down.

Wherein, when the above fluorine deficiency judgment conditions are met, the air conditioner controller controls the parking air conditioner to enter the fluorine deficiency protection state, and in the fluorine deficiency protection state, the air conditioner driving module in the parking air conditioner controls the compressor and the external fan to stop working.

S460, updating the shutdown times of the compressor.

Among them, the number of shutdowns of the compressor is the cumulative number of times the compressor enters the fluorine-deficiency protection state.

S470, judging whether the shutdown times of the compressor is less than the preset shutdown times threshold; if yes, go to S480; if not, go to S490.

Among them, the threshold value of preset shutdown times can be set as a constant above 3; specifically, in the fluorine-deficiency protection state, at the same time, it is judged whether the shutdown times of the compressor are less than the preset shutdown times threshold, that is, it is judged that the compressor has entered the fluorine-deficiency protection Whether the state count is less than the preset count.

S480, control and start the compressor and the outdoor fan after the first time period.

Wherein, if the condition of "compressor shutdown times less than the preset shutdown times threshold" is satisfied, restart the compressor and the outdoor fan after the compressor and the outdoor fan stop working for a first period of time; wherein , the first duration can be set to 3 minutes.

Further, after restarting the compressor and the outdoor fan, jump to execution of S430 to continue the detection of fluorine deficiency.

S490, maintaining the fluorine-deficiency protection state, sending fault information, and clearing the shutdown times of the compressor.

Among them, if the condition of "the accumulative number of times of entering the fluorine-deficiency protection state is less than the preset shutdown times threshold" is not satisfied, it means that the fluorine-deficiency condition has been met many times, and the parking air conditioner can be determined to be in the fluorine-deficiency state. At this time, the air-conditioning controller can send fault information to the fluorine-deficiency alarm module, specifically, it can control the indicator light of the display module to flash or display text information, and/or control the voice module to send prompts or voice messages; the air-conditioning controller can also Through the network connection module, the fluorine deficiency information is transmitted to the air conditioner after-sales platform, reminding the after-sales personnel to check and provide maintenance services to users in a timely manner.

In addition, the air-conditioning controller continuously obtains the working duration of the compressor, and if the working duration is greater than the preset duration threshold, the number of shutdown times of the compressor is reset to zero. Wherein, the preset duration threshold may be set to 20 minutes.

In order to better implement the fluorine deficiency detection method of the parking air conditioner provided in the embodiment of the application, on the basis of the fluorine deficiency detection method of the parking air conditioner proposed in the embodiment of the application, a method is also provided in the embodiment of the application The fluorine deficiency detection device of the parking air conditioner, as shown in Figure 5, the fluorine deficiency detection device 500 of the parking air conditioner includes:

The working parameter acquiring module 510 is used to acquire the input voltage value, working frequency and working current value of the compressor in the parking air conditioner;

A protection current threshold determination module 520, configured to determine the protection current threshold of the compressor according to the input voltage value;

The temperature value collection module 530 is used to collect the internal environment temperature value and the internal coil temperature value, and calculate the temperature difference between the internal environment temperature value and the internal coil temperature value;

The fluorine deficiency detection module 540 is used to determine that the parking air conditioner is in a fluorine deficiency state when the operating frequency of the compressor is greater than the preset frequency threshold, the operating current value is less than the protection current threshold, and the temperature difference is less than the preset temperature difference threshold.

In some embodiments of the present application, the protection current threshold determination module 520 is configured to compare the input voltage value with a preset high voltage threshold and a preset low voltage threshold; when the input voltage value is greater than the preset high When the voltage threshold is set, the protection current threshold is determined as the first current value; when the input voltage value is less than or equal to the high voltage threshold and greater than or equal to the low voltage threshold, the protection current threshold is determined as is the second current value; when the input voltage value is less than the low voltage threshold, the protection current threshold is determined as a third current value.

In some embodiments of the present application, the fluorine deficiency detection module 540 is used to control the shutdown of the compressor and the external fan in the parking air conditioner.

In some embodiments of the present application, the fluorine deficiency detection module 540 is used to update the shutdown times of the compressor; when the shutdown times do not reach the preset shutdown times threshold, control the startup of the compressor and the external fan after the first duration .

In some embodiments of the present application, the fluorine deficiency detection module 540 is configured to operate when the operating frequency of the compressor is less than or equal to the preset frequency threshold, the operating current value is greater than or equal to the protection current threshold, or the temperature difference is less than or equal to the preset When the temperature difference threshold is reached, the working duration of the compressor is obtained; when the working duration is greater than the preset duration threshold, the number of shutdown times of the compressor is cleared.

In some embodiments of the present application, the fluorine deficiency detection module 540 is configured to add the shutdown times of the compressor to a preset value to obtain a sum value; and update the value of the compressor shutdown times to the sum value.

In some embodiments of the present application, the working parameter acquisition module 510 is configured to control to turn on the external fan in the parking air conditioner in response to the cooling mode start instruction; after the external fan continues to work for a second period of time, control to turn on the compressor of the parking air conditioner. machine; after the compressor continues to work for a third period of time, acquire the input voltage value, operating frequency and operating current value of the compressor in the parking air conditioner.

For the specific limitations of the fluorine deficiency detection device of the parking air conditioner, please refer to the above limitation on the fluorine deficiency detection method of the parking air conditioner, which will not be repeated here. Each module in the above-mentioned fluorine deficiency detection device of the parking air conditioner can be fully or partially realized by software, hardware and a combination thereof. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, and can also be stored in the memory of the computer device in the form of software, so that the processor can invoke and execute the corresponding operations of the above-mentioned modules.

In some embodiments of the present application, the fluorine deficiency detecting device 500 of the parking air conditioner can be implemented in the form of a computer program, and the computer program can be run on the computer equipment as shown in FIG. 5 . Each program module of the fluorine deficiency detection device 500 forming the parking air conditioner can be stored in the memory of the computer equipment, such as the working parameter acquisition module 510 shown in Figure 5, the protection current threshold determination module 520, the temperature value acquisition module 530 and A fluorine deficiency detection module 540 . The computer program constituted by each program module enables the processor to execute the steps in the method for detecting fluorine deficiency of a parking air conditioner in each embodiment of the application described in this specification.

For example, the computer equipment as shown in FIG. 6 can execute step S210 through the working parameter acquisition module 510 in the fluorine deficiency detection device 500 of the parking air conditioner as shown in FIG. 5 . The computer device can execute step S220 through the protection current threshold determination module 520 . The computer device can execute step S230 through the temperature value acquisition module 530 . The computer device can execute step S240 through the fluorine deficiency detection module 540 . The computer device includes a processor, memory and a network interface connected by a system bus. Wherein, the processor of the computer device is used to provide calculation and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The network interface of the computer device is used to communicate with external computer devices via a network connection. When the computer program is executed by a processor, a method for detecting fluorine deficiency of a parking air conditioner is realized.

Those skilled in the art can understand that the structure shown in Figure 5 is only a block diagram of a part of the structure related to the solution of this application, and does not constitute a limitation to the computer equipment on which the solution of this application is applied. The specific computer equipment can be More or fewer components than shown in the figures may be included, or some components may be combined, or have a different arrangement of components.

In some embodiments of the present application, a parking air conditioner is provided, including one or more processors; memory; and one or more application programs, wherein the one or more application programs are stored in the memory , and configured for the processor to execute the steps of the above-mentioned fluorine deficiency detection method for the parking air conditioner. Here, the steps of the method for detecting fluorine deficiency of the parking air conditioner may be the steps in the methods for detecting the lack of fluorine of the parking air conditioner in the above-mentioned embodiments.

In some embodiments of the present application, a computer-readable storage medium is provided, which stores a computer program, and the computer program is loaded by a processor, so that the processor executes the steps of the above method for detecting fluorine deficiency of a parking air conditioner. Here, the steps of the method for detecting fluorine deficiency of the parking air conditioner may be the steps in the methods for detecting the lack of fluorine of the parking air conditioner in the above-mentioned embodiments.

Those of ordinary skill in the art can understand that realizing all or part of the processes in the methods of the above embodiments can be completed by instructing related hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium In this case, when the computer program is executed, it may include the processes of the embodiments of the above-mentioned methods. Any reference to memory, storage, database or other media used in the various embodiments provided in this application may include at least one of non-volatile and volatile memory. The non-volatile memory may include read-only memory (Read-Only Memory, ROM), magnetic tape, floppy disk, flash memory or optical memory, and the like. Volatile memory may include random access memory (Random Access Memory, RAM) or external cache memory. As an illustration and not a limitation, RAM can be in various forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM).

The technical features of the above embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be It is considered to be within the range described in this specification.

The method and device for detecting fluorine deficiency of a parking air conditioner provided in the embodiment of the present application, the parking air conditioner and the storage medium have been introduced in detail above. In this paper, specific examples are used to illustrate the principle and implementation of the present invention. Explain that the description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation and application scope In summary, the contents of this specification should not be construed as limiting the present invention.

Claims (10)

1. A method for detecting lack of fluorine in a parking air conditioner, characterized in that it comprises: Obtain the input voltage value, operating frequency and operating current value of the compressor in the parking air conditioner; determining a protection current threshold of the compressor according to the input voltage value; Collecting the internal environment temperature value and the internal coil temperature value, and calculating the temperature difference between the internal environment temperature value and the internal coil temperature value; If the operating frequency of the compressor is greater than a preset frequency threshold, the operating current value is less than the protection current threshold, and the temperature difference is less than a preset temperature difference threshold, it is determined that the parking air conditioner is in a fluorine-deficient state. 2. The method according to claim 1, wherein the determining the protection current threshold of the compressor according to the input voltage value comprises: comparing the input voltage value with a preset high voltage threshold and a preset low voltage threshold; If the input voltage value is greater than the preset high voltage threshold, determining the protection current threshold as a first current value; If the input voltage value is less than or equal to the high voltage threshold and greater than or equal to the low voltage threshold, determining the protection current threshold as a second current value; If the input voltage value is less than the low voltage threshold, the protection current threshold is determined as a third current value. 3. The method according to claim 1, characterized in that, after the step of determining that the parking air conditioner is in a fluorine-deficient state, further comprising: Control the compressor in the parking air conditioner and the external fan to shut down. 4. The method according to claim 3, characterized in that, after the shutdown of the compressor and the external fan in the parking air conditioner, the control comprises: updating the number of shutdowns of said compressor; If the shutdown times do not reach the preset shutdown times threshold, the compressor and the external fan are controlled to be started after a first period of time. 5. The method according to claim 4, wherein said updating the shutdown times of said compressor comprises: Adding the shutdown times of the compressor to a preset value to obtain a sum value; and Updating the value of the shutdown times of the compressor to the sum value. 6. The method according to claim 1, characterized in that, after calculating the temperature difference between the internal environment temperature value and the internal coil temperature value, further comprising: If the operating frequency of the compressor is less than or equal to the preset frequency threshold, the operating current value is greater than or equal to the protection current threshold or the temperature difference is less than or equal to the preset temperature difference threshold, obtain the compressor duration of work; If the working duration is longer than the preset duration threshold, the shutdown times of the compressor are reset to zero. 7. The method according to claim 1, wherein said obtaining the input voltage value, operating frequency and operating current value of the compressor in the parking air conditioner comprises: Responding to the cooling mode start instruction, control to turn on the external fan in the parking air conditioner; After the outdoor fan continues to work for a second period of time, control to turn on the compressor of the parking air conditioner; After the compressor continues to work for a third period of time, the input voltage value, operating frequency and operating current value of the compressor in the parking air conditioner are acquired. 8. A fluorine deficiency detection device for a parking air conditioner, characterized in that the device comprises: The working parameter obtaining module is used to obtain the input voltage value, working frequency and working current value of the compressor in the parking air conditioner; A protection current threshold determination module, configured to determine a protection current threshold of the compressor according to the input voltage value; The temperature value acquisition module is used to collect the internal environment temperature value and the internal coil temperature value, and calculate the temperature difference between the internal environment temperature value and the internal coil temperature value; A fluorine deficiency detection module, configured to determine that the compressor is parked when the operating frequency of the compressor is greater than a preset frequency threshold, the operating current value is less than the protection current threshold, and the temperature difference is less than a preset temperature difference threshold The air conditioner is in a fluorine-deficient state. 9. A parking air conditioner, characterized in that the parking air conditioner comprises: one or more processors; storage; and One or more application programs, wherein the one or more application programs are stored in the memory and configured to be executed by the processor to implement the parking air conditioner according to any one of claims 1 to 7 The detection method of fluorine deficiency. 10. A computer-readable storage medium, characterized in that a computer program is stored thereon, and the computer program is loaded by a processor to execute the parking air conditioner described in any one of claims 1 to 7. Steps in the fluorine detection method.

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