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

Abstract

The application provides a parking air conditioner and a fluorine deficiency detection method, device and storage medium thereof. The fluorine deficiency detection method of the parking air conditioner comprises the following steps: acquiring 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; collecting an inner environment temperature value and an inner coil temperature value, and calculating a temperature difference between the inner environment temperature value and the inner coil temperature value; and if the working frequency of the compressor is greater than a preset frequency threshold, the working 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 deficiency state. By acquiring the input voltage value of the compressor, the protection current threshold is determined in combination with the input voltage, and then the fluorine deficiency is detected according to the working frequency, the working current value, and the temperature difference between the inner environment temperature value and the inner coil temperature value, so that the accuracy of the fluorine deficiency detection can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, in particular to a parking air conditioner, a fluorine deficiency detection method and device thereof, and a computer readable storage medium (storage medium). BACKGROUND

[0002] The parking air conditioner refers to a parking air conditioner that can continuously operate through a storage battery or other driving power supply in a vehicle when waiting and resting, and adjusts and controls the temperature, humidity, flow rate and other parameters of the air in the vehicle environment. Since the parking air conditioner is installed on a vehicle, its working environment is subject to long-time jolting and vibration, and the welding points of the internal pipeline of the parking air conditioner are prone to breakage, which causes the refrigerant in the parking air conditioner to leak to different degrees during use. The leakage of the refrigerant leads to fluorine deficiency, which affects the refrigeration effect of the parking air conditioner, or even damages the compressor. SUMMARY

[0003] Therefore, it is necessary to provide a fluorine deficiency detection method and device for a parking air conditioner, a parking air conditioner and a storage medium in view of the above technical problems.

[0004] In a first aspect, the present application provides a fluorine deficiency detection method for a parking air conditioner, which comprises the following steps:

[0005] obtaining an input voltage value, a working frequency and a working current value of a compressor in the parking air conditioner;

[0006] determining a protection current threshold of the compressor according to the input voltage value;

[0007] collecting 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;

[0008] if the working frequency of the compressor is greater than a preset frequency threshold, the working current value is less than the protection current threshold, and the temperature difference value is less than a preset temperature difference threshold, it is determined that the parking air conditioner is in a fluorine deficiency state.

[0009] In some embodiments of the present application, the determination of the protection current threshold of the compressor according to the input voltage value comprises the following steps:

[0010] comparing the input voltage value with a preset high voltage threshold and a preset low voltage threshold;

[0011] if the input voltage value is greater than the preset high voltage threshold, the protection current threshold is determined as a first current value;

[0012] 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 a second current value;

[0013] If the input voltage value is less than the low voltage threshold value, the protection current threshold value is determined as the third current value.

[0014] In some embodiments of the present application, after the step of determining that the parked air conditioner is in the fluorine deficiency state, the method further comprises:

[0015] controlling the compressor and the external fan in the parked air conditioner to stop.

[0016] In some embodiments of the present application, after the step of controlling the compressor and the external fan in the parked air conditioner to stop, the method further comprises:

[0017] updating the number of times of stopping the compressor;

[0018] if the number of times of stopping the compressor does not reach a preset number of times of stopping threshold value, controlling the compressor and the external fan to start after a first time length.

[0019] In some embodiments of the present application, after the step of calculating the temperature difference between the indoor environment temperature value and the indoor coil temperature value, the method further comprises:

[0020] if the working frequency of the compressor is less than or equal to a preset frequency threshold value, the working current value is greater than or equal to the protection current threshold value, or the temperature difference is less than or equal to a preset temperature difference threshold value, obtaining a working duration of the compressor;

[0021] if the working duration is greater than a preset duration threshold value, resetting the number of times of stopping the compressor to zero.

[0022] In some embodiments of the present application, the step of updating the number of times of stopping the compressor comprises:

[0023] adding the number of times of stopping the compressor to a preset value to obtain a sum value; and

[0024] updating the value of the number of times of stopping the compressor to the sum value.

[0025] In some embodiments of the present application, the step of obtaining the input voltage value, the working frequency and the working current value of the compressor in the parked air conditioner comprises:

[0026] in response to a refrigeration mode starting instruction, controlling the external fan in the parked air conditioner to start;

[0027] after the external fan works for a second time length, controlling the compressor of the parked air conditioner to start;

[0028] after the compressor works for a third time length, obtaining the input voltage value, the working frequency and the working current value of the compressor in the parked air conditioner.

[0029] In a second aspect, the present application provides a fluorine deficiency detection device for a parked air conditioner, which comprises:

[0030] The working parameter acquisition module is configured to acquire an input voltage value, a working frequency and a working current value of the compressor in the parking air conditioner.

[0031] The protection current threshold determination module is configured to determine a protection current threshold of the compressor according to the input voltage value.

[0032] The temperature value acquisition module is configured to acquire an inner environment temperature value and an inner coil temperature value, and calculate a temperature difference value between the inner environment temperature value and the inner coil temperature value.

[0033] The fluorine deficiency detection module is configured to determine that the parking air conditioner is in a fluorine deficiency state when the working frequency of the compressor is greater than a preset frequency threshold, the working current value is less than the protection current threshold, and the temperature difference value is less than a preset temperature difference threshold.

[0034] In a third aspect, the present application further provides a parking air conditioner, which comprises:

[0035] One or more processors;

[0036] A memory; and

[0037] 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.

[0038] In a fourth aspect, the present application further provides a computer readable storage medium, which stores a computer program. The computer program is loaded by a processor to execute steps in the fluorine deficiency detection method of the parking air conditioner.

[0039] In a fifth aspect, an embodiment of the present application provides a computer program product or a computer program, which comprises computer instructions stored in a computer readable storage medium. A processor of a computer device reads the computer instructions from the computer readable storage medium, and the processor executes the computer instructions to enable the computer device to execute the method provided in the first aspect.

[0040] The method and device for detecting lack of fluorine of the above-mentioned stationary air conditioner, the stationary air conditioner and the storage medium, by acquiring the input voltage value, working frequency and working current value of the compressor in the stationary air conditioner; determining the protection current threshold of the compressor according to the input voltage value; collecting the inner environment temperature value and the inner coil temperature value, and calculating the temperature difference between the inner environment temperature value and the inner coil temperature value; if the working frequency of the compressor is greater than the preset frequency threshold, the working 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 stationary air conditioner is in a lack of fluorine state. In the actual operation process of the stationary air conditioner, the total power is constant, when the power supply voltage, i.e. the input voltage value, increases, the working current of the compressor decreases, and vice versa, when the power supply voltage, i.e. the input voltage value, decreases, the working current of the compressor increases. Therefore, by acquiring the input voltage value of the compressor, combining the input voltage to determine the protection current threshold, and then according to the size relationship between the working frequency, the working current value, the temperature difference between the inner environment temperature value and the inner coil temperature value, and the preset frequency threshold, the protection current threshold and the preset temperature difference threshold, the fluorine deficiency detection can be improved. The accuracy of the fluorine deficiency detection can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0042] Figure 1 is a scene diagram of the method for detecting lack of fluorine of the stationary air conditioner in the embodiments of the present application;

[0043] Figure 2 is a flow diagram of the method for detecting lack of fluorine of the stationary air conditioner in the embodiments of the present application;

[0044] Figure 3 is a structural diagram of the stationary air conditioner in the embodiments of the present application;

[0045] Figure 4 is a flow diagram of another method for detecting lack of fluorine of the stationary air conditioner in the embodiments of the present application;

[0046] Figure 5 is a structural diagram of the device for detecting lack of fluorine of the stationary air conditioner in the embodiments of the present application;

[0047] Figure 6 is a structural diagram of the computer device in the embodiments of the present application. DETAILED DESCRIPTION

[0048] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0049] In the description of the present application, the terms "first", "second" are used only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0050] In the description of the present application, the word "for example" is used to indicate "as an example, illustration or description". Any embodiment described as "for example" in the present application is not necessarily interpreted as more preferred or more advantageous than other embodiments. The following description is given in order to enable any person skilled in the art to implement and use the present application. In the following description, details are listed for the purpose of explanation. It should be understood that those skilled in the art can recognize that the present application can be implemented without using these specific details. In other examples, well-known structures and processes will not be described in detail in order to avoid unnecessary details making the description of the present application obscure. Therefore, the present application is not intended to be limited to the shown embodiments, but is consistent with the broadest scope consistent with the principles and characteristics disclosed in the present application.

[0051] The fluorine deficiency detection method of the stationary air conditioner provided by the embodiments of the present application can be applied to the fluorine deficiency detection system of the stationary air conditioner as shown in Figure 1 The fluorine deficiency detection system of the stationary air conditioner can include a stationary air conditioner 100 and a fluorine deficiency detection end 200. Specifically, the fluorine deficiency detection end 200 acquires the input voltage value, working frequency and working current value of the compressor in the stationary air conditioner 100; determines the protection current threshold of the compressor according to the input voltage value; collects the inner environment temperature value and the inner coil temperature value, and calculates the temperature difference between the inner environment temperature value and the inner coil temperature value; if the working frequency of the compressor is greater than the preset frequency threshold, the working 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 stationary air conditioner 100 is in a fluorine deficiency state.

[0052] Those skilled in the art can understand that Figure 1 The application environment shown in the above is only one application scenario of the present application scheme, and does not constitute a limitation on the application scenarios of the present application scheme. Other application environments can also include more than Figure 1more or less computer devices shown in the figures, such as Figure 1 In the above-mentioned embodiments, only one parking air conditioner 100 is shown, and it can be understood that the fluorine deficiency detection system of the parking air conditioner can also include one or more other servers, which are not limited here. In addition, as shown in the above-mentioned embodiments, the fluorine deficiency detection system of the parking air conditioner can also include a memory for storing data, such as storing air conditioner control parameters of different air conditioner unit types. Figure 1 In the above-mentioned embodiments, only one parking air conditioner 100 is shown, and it can be understood that the fluorine deficiency detection system of the parking air conditioner can also include one or more other servers, which are not limited here. In addition, as shown in the above-mentioned embodiments, the fluorine deficiency detection system of the parking air conditioner can also include a memory for storing data, such as storing air conditioner control parameters of different air conditioner unit types.

[0053] It should be noted that, Figure 1 The scene diagram of the fluorine deficiency detection system of the parking air conditioner shown in the above-mentioned embodiments is only an example, and the fluorine deficiency detection system of the parking air conditioner and the scene described in the above-mentioned embodiments are used to more clearly illustrate the technical solutions of the above-mentioned embodiments, and do not limit the technical solutions provided by the above-mentioned embodiments. It can be understood that, as the fluorine deficiency detection system of the parking air conditioner evolves and new business scenarios appear, the technical solutions provided by the above-mentioned embodiments are also applicable to similar technical problems.

[0054] Referring to Figure 2 , the above-mentioned embodiments provide a fluorine deficiency detection method for a parking air conditioner, which is mainly illustrated by taking the fluorine deficiency detection method applied to the fluorine deficiency detection end 200 in the above-mentioned Figure 1 The method includes steps S210 to S240, which are specifically as follows:

[0055] S210, obtaining an input voltage value, a working frequency, and a working current value of a compressor in the parking air conditioner.

[0056] The automobile is configured with a direct current power supply such as a storage battery, and the direct current power supply supplies power to the parking air conditioner through a power line. It can be understood that the parking air conditioner can be powered by different direct current power supplies such as 12 volts, 24 volts, 36 volts, and 48 volts. The input voltage value refers to the voltage value actually input into the parking air conditioner when the storage battery or other driving power supply is used. Specifically, a voltage detection module can be provided to obtain the input voltage value through the voltage detection module.

[0057] The working frequency refers to the actual frequency of the compressor in the parking air conditioner when the compressor is working, and the working current value refers to the actual current value of the compressor in the parking air conditioner when the compressor is working under the corresponding input voltage.

[0058] Specifically, after the parking air conditioner is turned on and works for a certain length of time, the input voltage value, the working frequency, and the working current value of the compressor in the parking air conditioner at the current time can be detected.

[0059] Further, in one embodiment, the input voltage value, the working frequency and the working current value of the compressor in the parking air conditioner are acquired, including: in response to a refrigeration mode starting instruction, controlling to start the external fan in the parking air conditioner; after the external fan continuously works for a second duration, controlling to start the compressor in the parking air conditioner; after the compressor continuously works for a third duration, acquiring the input voltage value, the working frequency and the working current value of the compressor in the parking air conditioner.

[0060] The second duration and the third duration can be set according to actual conditions. Specifically, when the refrigeration mode starting instruction is received, the parking air conditioner starts in the refrigeration mode, the external fan is preferentially controlled to start, the compressor is started after the external fan continuously works for the second duration, and the input voltage value, the working frequency and the working current value of the compressor in the parking air conditioner are acquired after the compressor continuously works for the third duration, so that subsequent fluorine deficiency detection is performed according to the input voltage value, the working frequency and the working current value of the compressor. By preferentially starting the external fan to the compressor, heat in the pipeline inside the parking air conditioner is quickly taken away, the temperature of the pipeline inside the parking air conditioner is reduced, the parking air conditioner can quickly refrigerate, energy consumption is reduced, and the accuracy of fluorine deficiency detection is improved. When the external fan and the compressor continuously work for a certain duration, the refrigerant in the parking air conditioner circulates and works stably, and fluorine deficiency detection at this time can improve the accuracy of fluorine deficiency detection.

[0061] In S220, the protection current threshold of the compressor is determined according to the input voltage value.

[0062] When the compressor operates in the fluorine deficiency state, the load of the compressor is reduced, and the working current of the compressor is reduced. The working current of the compressor in the parking air conditioner can be used to determine whether the compressor operates in the fluorine deficiency state. However, considering that the parking air conditioner often uses a direct current power supply with different rated voltages such as 12 volts, 24 volts, 36 volts and 48 volts for power supply, the actual input voltage value input to the parking air conditioner is quite different, and in the power supply process, the actual input voltage value input to the parking air conditioner fluctuates greatly on the basis of the rated voltage of the direct current power supply. Different input voltage values also affect the size of the working current of the compressor. If a unified 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 acquired, different protection current thresholds can be selected according to the input voltage value to improve the accuracy of fluorine deficiency detection and reduce fluorine deficiency false detection.

[0063] Wherein, in the actual operation process of the stationary air conditioner, the total power is often unchanged, when the input voltage value increases, the working current of the compressor decreases, and vice versa, when the input voltage value decreases, the working current of the compressor increases, 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 higher current value. For example, when the input voltage value is 22 volts, the protection current threshold can be set to 15 amperes; for another example, when the input voltage value is 27 volts, the protection current threshold can be set to 10 amperes.

[0064] Specifically, determining the protection current threshold of the compressor according to the input voltage value can be to pre-construct a lookup table or a correlation between different input voltage values and protection current thresholds; after obtaining the input voltage value of the stationary air conditioner at the current time, the corresponding protection current threshold is found from the lookup table according to the input voltage value, or the protection current threshold corresponding to the actual input voltage value is obtained according to the pre-constructed correlation between the input voltage value and the protection current threshold.

[0065] Further, in an embodiment, determining the protection current threshold of the compressor according to the input voltage value can further 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 high voltage threshold, the protection current threshold is determined 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, the protection current threshold is determined 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.

[0066] Wherein, the corresponding high voltage threshold and low voltage threshold can be pre-set for the rated voltage of the power supply DC power supply, and then the protection current threshold of the compressor is determined according to the size relationship between the input voltage value and the high voltage threshold and the low voltage threshold after the input voltage value is obtained; specifically, when the input voltage value is greater than the preset high voltage threshold, the protection current threshold can be set to a 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 a second current value, when the input voltage value is less than the low voltage threshold, the protection current threshold can be set to a third current value. Wherein, the values of the first current value, the second current value and the third current value increase in turn.

[0067] 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 amperes; 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 amperes; when the input voltage value is less than 22 volts, the protection current threshold can be set to 15 amperes.

[0068] S230, collect the indoor environment temperature value and the inner coil temperature value, and calculate the temperature difference between the indoor environment temperature value and the inner coil temperature value.

[0069] Specifically, the indoor environment temperature sensor and the inner coil temperature sensor can be arranged in the indoor unit of the parked air conditioner, and then the indoor environment temperature value at the current time is detected in real time by the indoor environment temperature sensor, and the inner coil temperature value at the current time is collected in real time by the inner coil temperature sensor, and the temperature difference between the indoor environment temperature value and the inner coil temperature value is calculated.

[0070] It can be understood that the temperature difference between the indoor environment temperature value and the inner coil temperature value can reflect whether the parked air conditioner is working normally. In the cooling mode, the inner coil temperature value is the lowest temperature that the parked air conditioner can cool, and if the difference between the indoor environment temperature value and the inner coil temperature value is large, it can be indicated that the parked air conditioner is working normally and there is no lack of fluorine. By taking the temperature difference between the indoor environment temperature value and the inner coil temperature value as a judgment condition for fluorine deficiency detection, the accuracy of fluorine deficiency detection can be effectively improved.

[0071] S240, if the working frequency of the compressor is greater than the preset frequency threshold, the working 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 parked air conditioner is in a fluorine deficiency state.

[0072] The preset frequency threshold can be set as the reference running frequency of the parked air conditioner in the non-fluorine deficiency state, and the working frequency is compared with the preset frequency threshold to ensure that the compressor is in a normal working state during fluorine deficiency detection. The preset temperature difference threshold can be set as the minimum value of the temperature difference between the temperature that the parked air conditioner can cool in the cooling mode and the indoor environment in the non-fluorine deficiency state of the parked air conditioner. By comparing the temperature difference with the preset temperature difference threshold, fluorine deficiency detection is realized in the temperature dimension. Specifically, in an embodiment, the preset frequency threshold can be set to 35 Hz, and the preset temperature difference threshold can be set to 3 degrees Celsius.

[0073] After obtaining the working frequency of the compressor, the working current value of the compressor, and the temperature difference between the indoor environment temperature value and the inner coil temperature value, fluorine deficiency detection can be performed based on the working frequency of the compressor, the working current of the compressor, and the temperature difference between the indoor environment temperature value and the inner coil temperature value. Specifically, the frequency threshold and the temperature difference threshold can be set in advance. When the working frequency of the compressor is greater than the preset frequency threshold, the working 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 parked air conditioner is in a fluorine deficiency state.

[0074] In one embodiment, after determining that the parking air conditioner is in the fluorine deficiency state, the compressor and the external fan in the parking air conditioner are stopped. Specifically, when it is determined that the parking air conditioner is in the fluorine deficiency state, the compressor and the external fan in the parking air conditioner are stopped to avoid the compressor from continuously working in the fluorine deficiency state and causing damage to the compressor.

[0075] Further, the refrigerant has a high viscosity when the temperature is high, which may cause misjudgment of the fluorine deficiency state. Therefore, in one embodiment, after the refrigerant in the compressor of the parking air conditioner is stopped, the parking air conditioner comprises: updating the number of times of stopping the compressor; and if the number of times of stopping the compressor does not reach a preset number of times of stopping threshold, the compressor and the external fan are controlled to start after a first time length.

[0076] The number of times of stopping the compressor is used to reflect the number of times that the parking air conditioner is determined to be in the fluorine deficiency state. The number of times of stopping the compressor can be counted in an accumulative manner or in a cumulative manner, and the selected preset number of times of abnormality is greater than the initial value of the number of times of abnormality. Correspondingly, the values of the preset number of times of stopping threshold are different when different counting manners are used. For example, when the number of times of stopping the compressor is counted in the accumulative manner, the initial value of the number of times of stopping the compressor can be set to zero, and the preset number of times of stopping threshold can be set to the maximum number of times that the parking air conditioner can withstand in the refrigeration working condition. For example, the preset number of times of stopping threshold can be set to 3, that is, the number of times of stopping the compressor is accumulated to 3, and it can be determined that the parking air conditioner is in the fluorine deficiency state. When the number of times of stopping the compressor is counted in the cumulative manner, the initial value of the number of times of stopping the compressor can be set to the maximum number of times that the parking air conditioner can withstand in the refrigeration working condition, and the preset number of times of stopping threshold can be set to zero, that is, the number of times of stopping the compressor is reduced to 0, and it can be determined that the parking air conditioner is in the fluorine deficiency state.

[0077] In one embodiment, updating the number of times of stopping the compressor can specifically comprise: adding the number of times of stopping the compressor to a preset value to obtain a sum; and updating the value of the number of times of stopping the compressor to the sum. The purpose of adding or subtracting the value of the number of times of stopping the compressor is to make the number of times of stopping reach the preset threshold. Specifically, when the number of times of stopping is updated in the accumulative manner, the preset value can be selected as 1, and when the number of times of stopping is updated in the cumulative manner, the preset value can be selected as -1, which is not limited herein.

[0078] Specifically, after updating the number of times of stopping the compressor, the number of times of stopping is compared with the preset number of times of stopping threshold. If the number of times of stopping is less than the preset number of times of stopping threshold, it is determined that there is a possibility of misjudgment that the parking air conditioner is in the fluorine deficiency state, and the compressor and the external fan are restarted after a first time length.

[0079] Further, if the number of shutdowns is equal to or greater than the preset number of shutdowns threshold, i.e., the number of shutdowns is equal to or greater than the preset number of shutdowns threshold, it is determined that the parking air conditioner is in a fluorine deficiency state, the compressor and the outdoor fan are saved, and a fluorine deficiency warning information is issued.

[0080] In the fluorine deficiency detection method of the parking air conditioner, the input voltage value, the working frequency and the working 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 indoor environment temperature value and the indoor coil temperature value are collected, and the temperature difference between the indoor environment temperature value and the indoor coil temperature value is calculated; if the working frequency of the compressor is greater than the preset frequency threshold, the working 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 in a fluorine deficiency state. In the actual operation process of the parking air conditioner, the total power is constant, when the power supply voltage, i.e., the input voltage value, increases, the working current of the compressor decreases, and vice versa, when the power supply voltage, i.e., the input voltage value, decreases, the working current of the compressor increases. Therefore, by obtaining the input voltage value of the compressor, determining the protection current threshold according to the input voltage, and then detecting the fluorine deficiency according to the size relationship between the working frequency, the working current value, the temperature difference between the indoor environment temperature value and the indoor coil temperature value, and the preset frequency threshold, the protection current threshold and the preset temperature difference threshold, the accuracy of fluorine deficiency detection can be improved.

[0081] Further, in one embodiment, after calculating the temperature difference between the indoor environment temperature value and the indoor coil temperature value, it further includes: if the working frequency of the compressor is less than or equal to the preset frequency threshold, the working 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, the working duration of the compressor is obtained; if the working duration is greater than the preset duration threshold, the number of shutdowns of the compressor is cleared.

[0082] Specifically, if the working frequency of the compressor is less than or equal to the preset frequency threshold, the working 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 in a non-fluorine deficiency state and works normally. At this time, the working duration of the compressor after the last shutdown and restart in the parking air conditioner can be obtained. When the working duration is greater than the preset duration threshold, it can be determined that the compressor is in a non-fluorine deficiency state. At this time, the number of shutdowns of the compressor can be cleared, reducing the misjudgment of fluorine deficiency detection and improving the accuracy of fluorine deficiency detection.

[0083] The fluorine deficiency detection method of the parking air conditioner is further described below in combination with specific application scenarios. Referring to Figure 3The transport truck is configured with a battery, and the battery supplies power to the parking air conditioner through a power line. The parking air conditioner is provided with at least an air conditioner controller, a voltage detection module, a compressor working parameter detection module, a temperature detection module, an air conditioner driving module, a fluorine deficiency alarm module, and a network connection module. Specifically, the air conditioner controller is connected with the voltage detection module, the temperature detection module, the air conditioner driving module, the fluorine deficiency alarm module, and the network connection module.

[0084] The functions of each module are as follows:

[0085] The voltage detection module is used to detect the input voltage value.

[0086] The compressor working parameter detection module is used to detect the working circuit and working frequency of the compressor.

[0087] The air conditioner driving module is used to receive the control parameters sent by the air conditioner controller to control the operation of the compressor, the inner fan, and the outer fan, so as to control the parking air conditioner to operate in the cooling mode or the heating mode.

[0088] The temperature detection module is connected with a plurality of temperature sensors and is used to receive the temperature parameters such as the inner environment temperature and the inner coil temperature detected by the temperature sensors and send them to the air conditioner controller. The temperature sensors include at least an inner environment temperature sensor, an inner coil temperature sensor, and an outer environment sensor.

[0089] The fluorine deficiency alarm module includes a display module and / or a voice module. The display module can be used to display fault information such as fluorine deficiency, and the voice module can be used to broadcast fault information such as fluorine deficiency.

[0090] The network connection module includes at least a Wifi module. The network connection module can be used to transmit fault information to an air conditioner after-sales service platform to timely remind after-sales personnel to take orders and perform maintenance work for users.

[0091] Specifically, as shown in Figure 4 When the user starts the parking air conditioner in the cooling mode, the parking air conditioner can operate according to the following steps:

[0092] S410, in response to the cooling mode start instruction, the outer fan in the parking air conditioner is controlled to start.

[0093] S420, after the outer fan works for a second time length, the compressor of the parking air conditioner is controlled to start.

[0094] After the outer fan works for a second time length, the compressor of the parking air conditioner starts.

[0095] S430, after the compressor continuously works for the third time length, acquiring the input voltage value, the working current value and the working frequency of the compressor, and acquiring the inner environment temperature value and the inner coil temperature value.

[0096] Wherein, after the compressor works for the third time length, the air conditioner controller acquires the input voltage value U of the current input through the voltage detection module, acquires the inner environment temperature value T through the temperature detection module 内环 and the inner coil temperature value T of the inner heat exchanger 内管 acquires the working frequency F of the compressor and the working current value I of the compressor through the compressor working parameter detection module 压缩机 .

[0097] S440, judging whether the input voltage value, the working current value, the working frequency, the inner environment temperature value and the inner coil temperature value satisfy the fluorine deficiency judgment condition; if yes, executing S450; if not, executing S490.

[0098] Wherein, after the air conditioner controller acquires the input voltage value U, the inner environment temperature value T 内环 , the inner coil temperature value T 内管 , the working frequency F and the working current value I 压缩机 , it detects the fluorine deficiency according to these parameters.

[0099] Specifically, the fluorine deficiency judgment condition is as follows:

[0100] 1) the working frequency F of the compressor ≥ F 预设 ; wherein, F 预设 can be set as 35 Hz;

[0101] 2) the working current I 压缩机 of the compressor ≤ the protection current threshold I 预设 ;

[0102] Wherein, taking 24V power supply voltage as an example: when the input voltage value U ≤ the preset low voltage threshold (for example, the preset low voltage threshold can be set as 22V), the protection current threshold I 预设 can be set as 15A; when the input voltage value U ≥ the preset high voltage threshold (for example, the preset high voltage threshold can be set as 27V), the protection current threshold I 预设 can be set as 10A;

[0103] 3) T 内环 -T 内管 ≤△T 预设温度 ; wherein,△T 预设温度 can be set as 3℃.

[0104] S450, entering the fluorine deficiency protection state, controlling the compressor and the outdoor fan in the stationary air conditioner to stop.

[0105] When the above fluorine deficiency judgment condition is met, the air conditioner controller controls the parking air conditioner to enter a fluorine deficiency protection state. 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.

[0106] S460, updating the number of times of stopping the compressor.

[0107] The number of times of stopping the compressor is the number of times of entering the fluorine deficiency protection state.

[0108] S470, judging whether the number of times of stopping the compressor is less than a preset number of times of stopping threshold; if yes, proceeding to S480; if no, proceeding to S490.

[0109] The preset number of times of stopping threshold can be set as a constant greater than or equal to 3. Specifically, in the fluorine deficiency protection state, it is simultaneously judged whether the number of times of stopping the compressor is less than the preset number of times of stopping threshold, that is, whether the number of times of entering the fluorine deficiency protection state is less than a preset number of times.

[0110] S480, controlling to start the compressor and the external fan after a first time length.

[0111] If the condition that the number of times of stopping the compressor is less than the preset number of times of stopping threshold is met, the compressor and the external fan are restarted after the first time length. The first time length can be set as 3 minutes.

[0112] Further, after restarting the compressor and the external fan, the process proceeds to S430 to continue the fluorine deficiency detection.

[0113] S490, maintaining the fluorine deficiency protection state, sending a fault information, and resetting the number of times of stopping the compressor.

[0114] If the condition that the number of times of entering the fluorine deficiency protection state is less than the preset number of times of stopping threshold is not met, it means that the fluorine deficiency condition is met for multiple times, and it can be determined that the parking air conditioner is in a fluorine deficiency state. At this time, the air conditioner controller can send a fault information to a fluorine deficiency alarm module, which can specifically be to control an indicator light of a display module to flash or display text information, and / or control a voice module to emit a prompt sound or voice information. The air conditioner controller can also transmit the fluorine deficiency information to an air conditioner after-sales platform through a network connection module to remind after-sales personnel to check and provide maintenance services for the user in time.

[0115] In addition, the air conditioner controller continuously acquires a working duration of the compressor, and resets the number of times of stopping the compressor if the working duration is greater than a preset duration threshold. The preset duration threshold can be set as 20 minutes.

[0116] In order to better implement the fluorine deficiency detection method of the stationary air conditioner provided in the embodiments of the present application, on the basis of the fluorine deficiency detection method of the stationary air conditioner provided in the embodiments of the present application, the embodiments of the present application further provide a fluorine deficiency detection device of a stationary air conditioner, as shown in the accompanying drawings, the fluorine deficiency detection device 500 of the stationary air conditioner comprises: Figure 5

[0117] The working parameter acquisition module 510 is configured to acquire an input voltage value, a working frequency and a working current value of the compressor in the stationary air conditioner.

[0118] The protection current threshold determination module 520 is configured to determine a protection current threshold of the compressor according to the input voltage value.

[0119] The temperature value acquisition module 530 is configured to acquire an inner environment temperature value and an inner coil temperature value, and calculate a temperature difference value between the inner environment temperature value and the inner coil temperature value.

[0120] The fluorine deficiency detection module 540 is configured to determine that the stationary air conditioner is in a fluorine deficiency state when the working frequency of the compressor is greater than a preset frequency threshold, the working current value is less than the protection current threshold, and the temperature difference value is less than a preset temperature difference threshold.

[0121] 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 voltage threshold, the protection current threshold is determined as a 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 a second current value; and when the input voltage value is less than the low voltage threshold, the protection current threshold is determined as a third current value.

[0122] In some embodiments of the present application, the fluorine deficiency detection module 540 is configured to control the compressor and the external fan in the stationary air conditioner to stop.

[0123] In some embodiments of the present application, the fluorine deficiency detection module 540 is configured to update the number of times of stopping the compressor; and when the number of times of stopping the compressor does not reach a preset number of times of stopping threshold, the compressor and the external fan are controlled to start after a first time length.

[0124] In some embodiments of the present application, the fluorine deficiency detection module 540 is configured to acquire a working duration of the compressor when the working frequency of the compressor is less than or equal to a preset frequency threshold, the working current value is greater than or equal to the protection current threshold, or the temperature difference value is less than or equal to a preset temperature difference threshold; and when the working duration is greater than a preset duration threshold, the number of times of stopping the compressor is cleared.

[0125] ​In some embodiments of the present application, the fluorine deficiency detection module 540 is configured to add the number of times of stopping the compressor to the preset value to obtain a sum value, and update the value of the number of times of stopping the compressor to the sum value.

[0126] In some embodiments of the present application, the working parameter acquisition module 510 is configured to, in response to the start instruction of the refrigeration mode, control to start the external fan in the stationary air conditioner; after the external fan works for a second time length, control to start the compressor in the stationary air conditioner; and after the compressor works for a third time length, acquire the input voltage value, the working frequency and the working current value of the compressor in the stationary air conditioner.

[0127] The specific limitation of the fluorine deficiency detection device of the stationary air conditioner can refer to the limitation of the fluorine deficiency detection method of the stationary air conditioner in the above, which will not be described here. Each module in the fluorine deficiency detection device of the stationary air conditioner described above can be realized by software, hardware and a combination thereof in whole or in part. The above-mentioned modules can be embedded in or independent of the processor in the computer device in hardware form, or can be stored in the memory in the computer device in software form, so as to be called and executed by the processor to perform the operations corresponding to each module.

[0128] In some embodiments of the present application, the fluorine deficiency detection device 500 of the stationary air conditioner can be realized in the form of a computer program, which can run on the computer device as shown in Figure 5 The memory of the computer device can store each program module constituting the fluorine deficiency detection device 500 of the stationary air conditioner, such as the working parameter acquisition module 510, the protection current threshold determination module 520, the temperature value acquisition module 530 and the fluorine deficiency detection module 540 as shown in Figure 5 The computer program constituted by each program module makes the processor execute the steps in the fluorine deficiency detection method of the stationary air conditioner of each embodiment of the present application described in the specification.

[0129] For example, the computer device as shown in Figure 6 may acquire the working parameter of the compressor in the stationary air conditioner through the working parameter acquisition module 510 as shown in Figure 5The working parameter acquisition module 510 in the fluorine deficiency detection device 500 of the parking air conditioner shown performs step S210. The computer device can perform step S220 through the protection current threshold determination module 520. The computer device can perform step S230 through the temperature value collection module 530. The computer device can perform step S240 through the fluorine deficiency detection module 540. The computer device includes a processor, a memory and a network interface connected through a system bus. Among them, the processor of the computer device is used to provide computing 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 a computer program. The internal memory provides an environment for the operating system and the computer program in the non-volatile storage medium to run. The network interface of the computer device is used to communicate with external computer devices through network connection. The computer program is executed by the processor to implement a fluorine deficiency detection method for a parking air conditioner.

[0130] Those skilled in the art can understand that, Figure 5 The structure shown in the figure is only a block diagram of part of the structure related to the scheme of the present application, and does not constitute a limitation on the computer device to which the scheme of the present application is applied. The specific computer device can include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0131] In some embodiments of the present application, a parking air conditioner is provided, including one or more processors; a memory; and one or more application programs, wherein the one or more application programs are stored in the memory and configured to perform the steps of the fluorine deficiency detection method for the parking air conditioner by the processor. The steps of the fluorine deficiency detection method for the parking air conditioner here can be the steps in the fluorine deficiency detection method for the parking air conditioner of each of the above embodiments.

[0132] In some embodiments of the present application, a computer readable storage medium is provided, which stores a computer program. The computer program is loaded by the processor, so that the processor performs the steps of the fluorine deficiency detection method for the parking air conditioner. The steps of the fluorine deficiency detection method for the parking air conditioner here can be the steps in the fluorine deficiency detection method for the parking air conditioner of each of the above embodiments.

[0133] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer readable storage medium, and when executed, can include the processes of the above-mentioned embodiment methods. Any reference to memory, storage, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. The non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory or optical memory. The volatile memory can include random access memory (RAM) or external cache memory. As an illustration but not limitation, the RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM).

[0134] Any combination of the technical features of the above embodiments can be made. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.

[0135] The above describes in detail the fluorine deficiency detection method and device of the parking air conditioner, the parking air conditioner and the storage medium provided by the embodiments of the present application. The principle and implementation mode of the present application are described by applying specific examples. The above embodiment is only used to help understand the method and core idea of the present application. Meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed. In summary, the content of the present application should not be understood as a limitation.

Claims

1. A method for detecting refrigerant deficiency in a parking air conditioner, characterized in that, include: Obtain the input voltage, operating frequency, and operating current of the compressor in the parking air conditioner; The protection current threshold of the compressor is determined based on the input voltage value; Collect the ambient temperature value and the inner coil temperature value, and calculate the temperature difference between the ambient temperature value and the inner 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 value is less than a preset temperature difference threshold, the parking air conditioner is determined to be in a refrigerant shortage state. Determining the protection current threshold of the compressor based on the input voltage value includes: The input voltage value is compared with a preset high voltage threshold and a preset low voltage threshold; the preset high voltage threshold and the preset low voltage threshold are determined based on the rated voltage of the DC power supply. 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, the protection current threshold is determined 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.

2. The method according to claim 1, characterized in that, After determining that the parking air conditioner is in a refrigerant-deficient state, the method further includes: Control the compressor and the outside air conditioner in the parking air conditioner to stop.

3. The method according to claim 2, characterized in that, After the compressor and the outside air conditioner in the parking air conditioner are turned off, the following steps are included: Update the number of times the compressor has been shut down; If the number of shutdowns does not reach the preset shutdown threshold, the compressor and the external fan will be started after a first duration.

4. The method according to claim 3, characterized in that, The update of the compressor shutdown count includes: The number of times the compressor is turned off and on is added to a preset value to obtain a sum; and Update the value of the number of times the compressor has been turned off to the sum value.

5. The method according to claim 1, characterized in that, After calculating the temperature difference between the ambient temperature and the internal coil temperature, the method further includes: If the operating frequency of the compressor is less than or equal to a preset frequency threshold, the operating current value is greater than or equal to the protection current threshold, or the temperature difference value is less than or equal to the preset temperature difference threshold, the operating duration of the compressor is obtained. If the duration of the operation exceeds a preset duration threshold, the number of times the compressor is shut down is reset to zero.

6. The method according to claim 1, characterized in that, The acquisition of the input voltage, operating frequency, and operating current of the compressor in the parking air conditioner includes: In response to the command to activate the cooling mode, the outdoor fan in the parking air conditioner is activated. After the external fan has been operating continuously for a second period of time, the compressor of the parking air conditioner is turned on. After the compressor has been running continuously for three hours, the input voltage, operating frequency, and operating current of the compressor in the parking air conditioner are obtained.

7. A refrigerant shortage detection device for a parking air conditioner, characterized in that, The device includes: The operating parameter acquisition module is used to acquire the input voltage, operating frequency, and operating current of the compressor in the parking air conditioner. A protection current threshold determination module is used to determine the protection current threshold of the compressor based on the input voltage value; The temperature acquisition module is used to acquire the indoor ambient temperature value and the inner coil temperature value, and calculate the temperature difference between the indoor ambient temperature value and the inner coil temperature value. The refrigerant shortage detection module is used to determine that the parking air conditioner is in a refrigerant shortage state when the compressor's operating frequency is greater than a preset frequency threshold, the operating current value is less than the protection current threshold, and the temperature difference value is less than a preset temperature difference threshold. The protection current threshold determination module is used to compare the input voltage value with a preset high voltage threshold and a preset low voltage threshold; the preset high voltage threshold and the preset low voltage threshold are determined based on the rated voltage of the DC power supply; when the input voltage value is greater than the preset high voltage threshold, the protection current threshold is determined as a 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 a 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.

8. A parking air conditioner, characterized in that, The parking air conditioner includes: One or more processors; Memory; and One or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the processor to implement the refrigerant shortage detection method for a parking air conditioner as described in any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, It stores a computer program, which is loaded by a processor to execute the steps of the refrigerant detection method for a parking air conditioner according to any one of claims 1 to 6.

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