Control methods for vehicle-mounted refrigerators, vehicle-mounted refrigerators, vehicles and storage media

Abstract

This application discloses a control method for a vehicle-mounted refrigerator, a vehicle-mounted refrigerator, a vehicle, and a storage medium, relating to the field of vehicle-mounted refrigerator technology. The disclosed control method includes: acquiring the ambient temperature inside the vehicle where the refrigerator is located; if the ambient temperature is higher than a set ambient temperature, reducing the refrigerant quantity and / or refrigerant flow rate of the refrigerator to reduce the motor temperature and / or compressor power. This solves the problem of vehicle-mounted refrigerators failing to start normally in high-temperature environments, resulting in poor cooling performance, and improves the cooling effect of vehicle-mounted refrigerators in high-temperature environments.

Description

Technical Field

[0001] This application relates to the field of vehicle-mounted refrigerator technology, and in particular to a control method for a vehicle-mounted refrigerator, a vehicle-mounted refrigerator, a vehicle, and a storage medium. Background Technology

[0002] As a crucial refrigeration device inside vehicles, the performance of car refrigerators directly impacts practical needs such as food preservation and medicine storage. Currently, most car refrigerators on the market utilize a compressor refrigeration cycle system, with core components including a compressor, condenser, evaporator, and expansion valve. Under normal operating conditions, such as 25–40°C, these refrigerators can achieve refrigeration through basic refrigerant circulation and temperature feedback control. However, in extreme high-temperature environments, such as inside a car exposed to direct sunlight without air conditioning, where the interior temperature exceeds 50°C, the compressor motor experiences a rapid temperature rise due to low heat dissipation efficiency. Simultaneously, the temperature difference between the evaporation and condensation phases increases, causing the compressor's power demand to far exceed its rated threshold. In this situation, the compressor motor frequently triggers its overload protection mechanism, preventing normal restart and affecting the car refrigerator's cooling performance. Summary of the Invention

[0003] The main purpose of this application is to provide a control method for a vehicle-mounted refrigerator, a vehicle-mounted refrigerator, a vehicle, and a storage medium, aiming to solve the technical problem that the vehicle-mounted refrigerator cannot start normally in high-temperature environments, resulting in poor cooling effect.

[0004] To achieve the above objectives, this application proposes a control method for a vehicle-mounted refrigerator, comprising:

[0005] Obtain the ambient temperature inside the vehicle where the in-vehicle refrigerator is located;

[0006] If the ambient temperature is higher than the set ambient temperature, reduce the amount and / or flow of refrigerant in the vehicle refrigerator to reduce the motor temperature and / or compressor power of the vehicle refrigerator.

[0007] In one embodiment, if the ambient temperature is higher than a set ambient temperature, reducing the refrigerant quantity and / or refrigerant flow rate of the vehicle refrigerator includes:

[0008] If the ambient temperature is higher than the set ambient temperature, reduce the amount of refrigerant in the vehicle refrigerator.

[0009] Obtain the motor temperature and / or compressor power of the vehicle refrigerator after refrigerant quantity adjustment;

[0010] If the motor temperature exceeds the preset temperature or the compressor power exceeds the preset power, reduce the refrigerant flow to the vehicle refrigerator and / or return to the original setting to reduce the refrigerant quantity to the vehicle refrigerator; and / or,

[0011] If the motor temperature is less than or equal to the preset temperature and the compressor power is less than or equal to the preset power, stop adjusting the refrigerant flow and / or refrigerant quantity.

[0012] In one embodiment, obtaining the motor temperature and / or compressor power of the vehicle refrigerator after refrigerant quantity adjustment includes:

[0013] The evaporation temperature of the vehicle refrigerator after the refrigerant quantity is adjusted;

[0014] Obtain the preset motor temperature and / or preset compressor power corresponding to the evaporation temperature;

[0015] The motor temperature is obtained based on the preset motor temperature, and / or the compressor power is obtained based on the preset compressor power.

[0016] In one embodiment, if the motor temperature is greater than a preset temperature or the compressor power is greater than a preset power, reducing the refrigerant flow of the vehicle refrigerator and / or reverting to reducing the refrigerant quantity of the vehicle refrigerator includes:

[0017] If the motor temperature is higher than the preset temperature or the compressor power is higher than the preset power, obtain the current refrigerant quantity of the vehicle refrigerator;

[0018] If the current refrigerant level is not at the minimum required level, return to the previous step to reduce the refrigerant level of the vehicle refrigerator; and / or,

[0019] If the current refrigerant level reaches the minimum refrigerant level, reduce the refrigerant flow of the vehicle refrigerator.

[0020] In one embodiment, reducing the refrigerant quantity of the vehicle refrigerator includes:

[0021] Reduce the refrigerant level of the vehicle refrigerator according to the first adjustment cycle and the refrigerant level adjustment step.

[0022] In one embodiment, the vehicle-mounted refrigerator includes a compressor, a first heat exchanger, an electronic expansion valve, a dryer filter, and a second heat exchanger connected in sequence. A first control valve is provided in a first flow path between the compressor and the first heat exchanger, and a liquid receiver is provided in a second flow path between the compressor and the second heat exchanger. A second control valve is provided between the liquid receiver and the compressor. Reducing the refrigerant quantity in the vehicle-mounted refrigerator includes:

[0023] Determine the opening degree of the first control valve and / or the second control valve based on the refrigerant quantity adjustment step.

[0024] The current opening of the first control valve is reduced based on the opening of the first control valve, and / or the current opening of the second control valve is reduced based on the opening of the second control valve.

[0025] In one embodiment, reducing the refrigerant flow of the vehicle refrigerator includes:

[0026] Reduce the refrigerant flow of the vehicle refrigerator according to the second adjustment cycle and the electronic expansion valve opening adjustment step;

[0027] Obtain the motor temperature and / or compressor power of the vehicle refrigerator after refrigerant flow adjustment;

[0028] If the motor temperature is greater than the preset temperature or the compressor power is greater than the preset power, obtain the current electronic expansion valve opening of the vehicle refrigerator;

[0029] If the current electronic expansion valve opening has not reached the minimum electronic expansion valve opening, return to the step of reducing the refrigerant flow of the vehicle refrigerator according to the second adjustment cycle and the electronic expansion valve opening adjustment step; and / or,

[0030] If the current electronic expansion valve opening reaches the minimum electronic expansion valve opening, the adjustment of refrigerant flow will stop, and the compressor of the vehicle refrigerator will be shut down.

[0031] In addition, to achieve the above objectives, this application also proposes a vehicle refrigerator, including: a memory, a processor, and a computer program stored on the memory and executable on the processor, the computer program being configured to implement the steps of the vehicle refrigerator control method described above.

[0032] In addition, to achieve the above objectives, this application also proposes a vehicle including the aforementioned vehicle-mounted refrigerator.

[0033] In addition, to achieve the above objectives, this application also proposes a storage medium, which is a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, it implements the steps of the vehicle refrigerator control method described above.

[0034] This application obtains the ambient temperature inside the vehicle where the vehicle refrigerator is located. If the ambient temperature is higher than a set ambient temperature, the refrigerant quantity and / or refrigerant flow rate of the vehicle refrigerator are reduced, thereby reducing the motor temperature and / or compressor power. Since reducing the refrigerant quantity and / or refrigerant flow rate lowers the evaporation temperature, the motor temperature and / or compressor power also decrease. This reduces the motor temperature and / or compressor power, preventing the compressor power from exceeding the rated threshold and / or the compressor motor temperature from becoming too high and triggering the protection mechanism, thus avoiding frequent compressor shutdowns and poor cooling performance in high-temperature environments. Attached Figure Description

[0035] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0036] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 A flowchart illustrating an embodiment of the control method for a vehicle-mounted refrigerator according to this application;

[0038] Figure 2 This is a detailed flowchart illustrating step A20 of the control method for the vehicle-mounted refrigerator in this application;

[0039] Figure 3 This is a detailed flowchart illustrating step A22 of the control method for the vehicle-mounted refrigerator in this application;

[0040] Figure 4 This is a detailed flowchart illustrating step A23 of the control method for the vehicle-mounted refrigerator in this application;

[0041] Figure 5 This is another detailed flowchart of step A23 of the control method for the vehicle-mounted refrigerator in this application;

[0042] Figure 6 This is a schematic diagram of the vehicle-mounted refrigerator of this application.

[0043] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0044] It should be understood that the specific embodiments described herein are merely illustrative of the technical solutions of this application and are not intended to limit this application.

[0045] To better understand the technical solution of this application, a detailed description will be provided below in conjunction with the accompanying drawings and specific implementation methods.

[0046] As an essential refrigeration device inside modern vehicles, the stability and efficiency of in-vehicle refrigerators directly affect diverse needs such as food preservation and medicine storage. With the development of the automotive industry and the improvement of consumers' living standards, the application of in-vehicle refrigerators is becoming increasingly widespread, making them an essential piece of equipment for many car owners.

[0047] Currently, most car refrigerators on the market use a compressor refrigeration cycle system. This system achieves its refrigeration function by circulating refrigerant through core components such as the compressor, condenser, evaporator, and expansion valve. Under normal operating conditions, such as a temperature range of 25°C to 40°C, car refrigerators can effectively maintain a low temperature inside the refrigerator and meet users' refrigeration needs by relying on basic refrigerant circulation and temperature feedback control mechanisms.

[0048] However, under certain extreme high-temperature environments, the performance of car refrigerators can be severely affected. For example, when a vehicle is exposed to direct sunlight for an extended period without the air conditioning on, the interior temperature can exceed 50°C. Under these extreme conditions, the compressor motor of the car refrigerator experiences a rapid temperature rise due to its low heat dissipation efficiency. Simultaneously, the increased temperature difference between the evaporation and condensation phases in the refrigeration cycle due to the high temperature causes the compressor's power demand to far exceed its rated threshold. This not only accelerates compressor wear and reduces its lifespan but may also trigger the compressor's overload protection mechanism, leading to frequent refrigerator shutdowns and failure to restart normally.

[0049] Therefore, the existing vehicle refrigerators do not perform well in extreme high-temperature environments, making it difficult to meet users' diverse needs for food preservation, medicine storage, and other purposes.

[0050] To overcome this technical challenge, a control method for vehicle-mounted refrigerators that can intelligently adjust the refrigerant quantity and / or refrigerant flow rate is needed to improve the refrigerator's cooling efficiency and stability in extreme high-temperature environments. This application proposes a control method for a vehicle-mounted refrigerator, including: acquiring the ambient temperature inside the vehicle where the refrigerator is located; if the ambient temperature is higher than a set ambient temperature, reducing the refrigerant quantity and / or refrigerant flow rate of the refrigerator to reduce the motor temperature and / or compressor power. Since reducing the refrigerant quantity and / or refrigerant flow rate lowers the evaporation temperature, and consequently reduces the motor temperature and / or compressor power, this method reduces the motor temperature and / or compressor power, preventing the compressor power from exceeding the rated threshold and / or the compressor motor temperature from overheating and triggering the protection mechanism in high-temperature environments, thus avoiding frequent compressor shutdowns and poor cooling performance. This improves the cooling effect of the refrigerator in high-temperature environments.

[0051] It should be noted that the vehicle refrigerator of this application can be an air-cooled vehicle refrigerator. The working principle of an air-cooled vehicle refrigerator mainly involves a built-in fan promoting the circulation of cold air inside the refrigerator to achieve a cooling effect. The vehicle refrigerator of this application can also be other types of vehicle refrigerators, such as a direct-cooling vehicle refrigerator, which relies on natural convection cooling through an evaporator. Compared to a direct-cooling vehicle refrigerator, an air-cooled vehicle refrigerator cools faster; therefore, this application preferably uses an air-cooled vehicle refrigerator. In addition to its cooling function, the air-cooled vehicle refrigerator of this application also has a heating function.

[0052] The air-cooled vehicle refrigerator of this application includes a compressor, a condenser (second heat exchanger), a dryer filter, a capillary tube, an evaporator (first heat exchanger), and a return pipe assembly. During the refrigeration process, the compressor is the heart of the refrigeration system, providing power to the entire system. It compresses the low-pressure gaseous refrigerant at room temperature into a high-temperature, high-pressure gaseous refrigerant. The condenser dissipates heat from the refrigeration system, condensing the high-temperature, high-pressure gas discharged from the compressor into a room-temperature, high-pressure liquid. The dryer filter absorbs moisture and impurities in the system, preventing ice blockage and dirt blockage. The capillary tube acts as a throttling and pressure-reducing element. The evaporator employs a dual-evaporator design, where the refrigerant changes from liquid to gas, absorbing heat from the interior of the refrigerator to achieve the refrigeration effect. The return pipe assembly contains the low-temperature gaseous refrigerant from the evaporator, which exchanges heat with the capillary tube to become a room-temperature gaseous refrigerant.

[0053] In practical applications, when the air-cooled vehicle refrigerator is in cooling mode, if the temperature sensor inside the vehicle refrigerator has not reached the stop temperature, the compressor will start and the bottom cooling fan will run to start cooling until the temperature sensor inside the vehicle refrigerator reaches the stop temperature, at which point cooling will stop.

[0054] Based on this, this application provides a control method for a vehicle-mounted refrigerator, referring to... Figure 1 , Figure 1 This is a flowchart illustrating some embodiments of the control method for a vehicle-mounted refrigerator according to this application.

[0055] In some embodiments of this application, the control method for a vehicle-mounted refrigerator includes steps S10 to S20:

[0056] Step S10: Obtain the ambient temperature inside the vehicle where the in-vehicle refrigerator is located.

[0057] Ambient temperature refers to the actual temperature inside the vehicle where the car refrigerator is located. Obtaining the ambient temperature inside the vehicle is used as a basis for subsequent control decisions regarding the car refrigerator.

[0058] In one feasible implementation, the ambient temperature inside the vehicle where the car refrigerator is located can be obtained using the vehicle's built-in system. For example, modern cars typically have an instrument panel with an interior temperature display function, which directly shows the current ambient temperature inside the vehicle. The design of the instrument panel may vary between different models; some models may display the interior temperature along with the outside temperature. Some high-end models provide more detailed temperature information on the vehicle's central control display screen, which can be viewed and set through the vehicle's multimedia system. Alternatively, some vehicles are equipped with smartphone connectivity; by connecting a mobile phone to the vehicle and using appropriate software, it is possible to obtain the vehicle's temperature data in real time, including the interior temperature.

[0059] In another feasible implementation, an external temperature measuring tool is used to obtain more accurate temperature data. For example, the surface temperature of an object can be measured by receiving infrared radiation emitted by the object.

[0060] Step S20: If the ambient temperature is higher than the set ambient temperature, reduce the amount and / or flow of refrigerant in the vehicle refrigerator to reduce the motor temperature and / or compressor power of the vehicle refrigerator.

[0061] The ambient temperature can be set to a fixed value at the factory through testing, or it can be manually set during vehicle use. The ambient temperature setting can be 50℃, 55℃, or 65℃.

[0062] Refrigerant quantity refers to the total amount of refrigerant circulating in the refrigeration system of a vehicle refrigerator.

[0063] Refrigerant flow rate refers to the volume or mass of refrigerant flowing through a point in the refrigeration system of a vehicle refrigerator per unit time.

[0064] Motor temperature refers to the temperature at which the compressor motor operates, usually expressed in °C.

[0065] Compressor power refers to the electrical energy consumed by the compressor to drive the refrigerant cycle, and its unit is watts (W).

[0066] In hot summer weather, if the air conditioning is not turned on in a vehicle, the interior temperature will rise significantly after prolonged exposure to sunlight, exceeding the set ambient temperature. When the interior temperature exceeds the set temperature, the compressor motor of the car refrigerator will experience a rapid temperature increase due to its low heat dissipation efficiency. Simultaneously, the high temperature environment increases the temperature difference between the evaporation and condensation cycles, causing the compressor's power demand to far exceed its rated threshold. This not only accelerates compressor wear and reduces its lifespan but may also trigger the compressor's overload protection mechanism, leading to frequent refrigerator shutdowns and failure to restart normally. Therefore, when the interior temperature is detected to be higher than the set ambient temperature, the refrigerant quantity and / or refrigerant flow rate of the car refrigerator are reduced to lower the motor temperature and / or compressor power.

[0067] In one feasible implementation, if the ambient temperature is higher than a set ambient temperature, the refrigerant quantity of the vehicle refrigerator is reduced to decrease the motor temperature and / or compressor power. Alternatively, if the ambient temperature is higher than a set ambient temperature, the refrigerant flow rate of the vehicle refrigerator is reduced to decrease the motor temperature and / or compressor power. Alternatively, if the ambient temperature is higher than a set ambient temperature, both the refrigerant quantity and flow rate of the vehicle refrigerator are reduced to decrease the motor temperature and / or compressor power.

[0068] In another feasible implementation, by using a refrigerant replenisher and a solenoid valve in conjunction, a portion of the refrigerant is transferred to the receiver at high temperatures, reducing the amount of circulating refrigerant and thus lowering the refrigerant level in the vehicle refrigerator. This is achieved by dynamically adjusting the opening of the electronic expansion valve, thereby reducing the refrigerant flow rate of the vehicle refrigerator.

[0069] It's important to note that the evaporation temperature is the temperature at which the refrigerant evaporates in the evaporator during the refrigeration cycle of a car refrigerator. This directly affects the compressor's power requirements and the motor temperature. In high-temperature environments, actively lowering the evaporation temperature reduces the compressor load and motor temperature, thus resolving starting difficulties and overheating issues. The specific working principle is as follows: When the evaporation temperature rises, the refrigerant evaporation pressure increases, requiring the compressor to consume more power to overcome the high pressure difference. This increased compressor power leads to increased motor current, further intensifying the motor temperature. In extreme cases, this can cause power overruns or excessive temperature rise, triggering a protective shutdown. Therefore, to avoid frequent shutdown protection triggers, the evaporation temperature can be lowered. When the evaporation temperature decreases, the evaporation pressure decreases, reducing the compressor's workload and consequently lowering the compressor power and motor temperature. This improves the stability of the refrigeration system and prevents overheating protection.

[0070] The formula for the work done by the compressor can be expressed as:

[0071]

[0072] Where, k represents the compression index, which is an index of the compression ratio of the gas in the cylinder, used to measure the degree to which the gas is compressed. The larger the compression index, the more difficult it is to compress the gas, and more power is required to complete the compression process; Rg represents the gas constant; T1 represents the gas temperature in the compressor cylinder. When the evaporation temperature decreases, the return gas temperature also decreases, causing T1 to decrease as well; P d / P s The compression ratio indicates the compressor's pressure. It is the ratio of the compressor's discharge absolute pressure to its suction absolute pressure, typically used to measure the ratio of high to low pressure in a system. Where P... d P represents the absolute pressure of the compressor discharge. s This represents the absolute pressure of the intake gas. When the evaporation temperature decreases, the return gas temperature also decreases. (P) d / P s It will also decrease; W s This indicates the amount of work done by the compressor.

[0073] The key is to reduce the evaporation temperature. This application reduces the amount and / or flow of refrigerant in the vehicle refrigerator, thereby lowering the evaporation temperature and ultimately reducing the motor temperature and / or compressor power. Specifically, by adding a refrigerant replenisher, which stores excess refrigerant and dynamically releases or recovers it via a level controller, the amount of refrigerant decreases. As the refrigerant amount decreases, the evaporation temperature drops, and the compressor power decreases accordingly. In this process, compressor power, refrigerant amount, and evaporation temperature are positively correlated. Furthermore, this application reduces the motor temperature and / or compressor power of the vehicle refrigerator by adjusting the opening of the electronic expansion valve. The electronic expansion valve throttles the refrigerant, controlling the flow and pressure entering the evaporator. When the opening of the electronic expansion valve decreases, the refrigerant flow further decreases, leading to a further decrease in evaporation temperature and pressure, resulting in a continuous decrease in compressor power. In this process, compressor power, refrigerant flow, and evaporation temperature are positively correlated.

[0074] By adopting a closed-loop control logic that reduces the evaporation temperature to decrease compression work and thus controls the motor temperature and compressor power, combined with the coordinated adjustment of the liquid replenishment device and the electronic expansion valve, the starting difficulty and overheating problem of the vehicle refrigerator under ultra-high temperature conditions are fundamentally solved.

[0075] In this embodiment, the ambient temperature inside the vehicle where the vehicle refrigerator is located is obtained. If the ambient temperature is higher than a set ambient temperature, the amount and / or flow rate of the refrigerant in the vehicle refrigerator are reduced to decrease the motor temperature and / or compressor power. Since a reduction in the amount and / or flow rate of the refrigerant lowers the evaporation temperature, the motor temperature and / or compressor power also decrease. This reduces the motor temperature and / or compressor power, preventing the compressor power from exceeding the rated threshold and / or the compressor motor temperature from overheating and triggering the protection mechanism in high-temperature environments, thus avoiding frequent compressor shutdowns and poor cooling performance. This improves the cooling effect of the vehicle refrigerator in high-temperature environments.

[0076] In other embodiments, in addition to acquiring the ambient temperature inside the vehicle where the in-vehicle refrigerator is located, the ambient temperature outside the vehicle where the in-vehicle refrigerator is located can also be acquired. If the ambient temperature inside the vehicle is higher than a first set ambient temperature and the ambient temperature outside the vehicle is higher than a second set ambient temperature, the refrigerant quantity and / or refrigerant flow rate of the in-vehicle refrigerator are reduced to lower the motor temperature and / or compressor power of the in-vehicle refrigerator. By acquiring the ambient temperature inside and outside the vehicle where the in-vehicle refrigerator is located for subsequent control judgments, accurate judgment of the environment in which the in-vehicle refrigerator is located can be achieved, avoiding temperature misjudgments and improving the accuracy of subsequent control.

[0077] Based on the above embodiments, in some embodiments of this application, reference is made to... Figure 2 If the ambient temperature is higher than the set ambient temperature, reducing the refrigerant quantity and / or flow rate of the vehicle refrigerator includes:

[0078] Step A21: If the ambient temperature is higher than the set ambient temperature, reduce the amount of refrigerant in the vehicle refrigerator.

[0079] Step A22: Obtain the motor temperature and / or compressor power of the vehicle refrigerator after refrigerant quantity adjustment.

[0080] Step A23: If the motor temperature is greater than the preset temperature or the compressor power is greater than the preset power, reduce the refrigerant flow of the vehicle refrigerator and / or return to the step of reducing the refrigerant quantity of the vehicle refrigerator.

[0081] And / or, in step A24, if the motor temperature is less than or equal to the preset temperature and the compressor power is less than or equal to the preset power, stop adjusting the refrigerant flow rate and / or refrigerant quantity.

[0082] In one feasible implementation, if the ambient temperature is higher than the set ambient temperature, the refrigerant quantity of the vehicle refrigerator is reduced; the motor temperature and / or compressor power of the vehicle refrigerator after the refrigerant quantity adjustment are obtained; if the motor temperature is less than or equal to the preset temperature and the compressor power is less than or equal to the preset power, the adjustment of the refrigerant flow rate is stopped.

[0083] In another feasible implementation, if the ambient temperature is higher than the set ambient temperature, the refrigerant quantity of the vehicle refrigerator is reduced. The motor temperature and / or compressor power of the vehicle refrigerator after refrigerant quantity adjustment are obtained. If the motor temperature is higher than the preset temperature or the compressor power is higher than the preset power, the refrigerant flow rate of the vehicle refrigerator is further reduced, and the motor temperature and / or compressor power of the vehicle refrigerator after refrigerant quantity adjustment are obtained again. If the motor temperature is less than or equal to the preset temperature and the compressor power is less than or equal to the preset power, the adjustment of the refrigerant quantity is stopped.

[0084] In another feasible implementation, if the ambient temperature is higher than the set ambient temperature, the refrigerant quantity of the vehicle refrigerator is reduced; the motor temperature and / or compressor power of the vehicle refrigerator after the refrigerant quantity is adjusted are obtained; if the motor temperature is higher than the preset temperature or the compressor power is higher than the preset power, the refrigerant flow rate of the vehicle refrigerator is reduced; if the motor temperature is lower than or equal to the preset temperature and the compressor power is lower than or equal to the preset power, the adjustment of the refrigerant flow rate is stopped.

[0085] In another feasible implementation, if the ambient temperature is higher than the set ambient temperature, the refrigerant quantity of the vehicle refrigerator is reduced; the motor temperature and / or compressor power of the vehicle refrigerator after refrigerant quantity adjustment are obtained; if the motor temperature is higher than the preset temperature or the compressor power is higher than the preset power, the refrigerant flow rate of the vehicle refrigerator is reduced; the motor temperature and / or compressor power of the vehicle refrigerator after refrigerant quantity adjustment are obtained again; if the motor temperature is higher than the preset temperature or the compressor power is higher than the preset power, the refrigerant flow rate of the vehicle refrigerator is reduced again; if the motor temperature is less than or equal to the preset temperature and the compressor power is less than or equal to the preset power, the adjustment of the refrigerant flow rate is stopped.

[0086] In summary, the refrigerant quantity and flow rate can be adjusted independently, or the refrigerant quantity can be adjusted first, followed by the flow rate. Furthermore, the number of adjustments to the refrigerant quantity and flow rate can be set according to the actual situation, for example, one or more times. It should be noted that adjusting the refrigerant quantity first, followed by the flow rate, improves the control effect of the vehicle refrigerator compared to adjusting the flow rate first, allowing the motor temperature and / or compressor power to quickly decrease below the preset values.

[0087] In this embodiment, the cooling effect and energy consumption of the vehicle refrigerator are optimized by adjusting the refrigerant quantity and flow rate in stages, controlling the motor temperature of the vehicle refrigerator to be less than or equal to the preset temperature and controlling the compressor power to be less than or equal to the preset temperature, thereby improving the cooling effect of the vehicle refrigerator.

[0088] Furthermore, refer to Figure 3 The motor temperature and / or compressor power of the vehicle refrigerator after refrigerant quantity adjustment include:

[0089] Step A221: Obtain the evaporation temperature of the vehicle refrigerator after refrigerant quantity adjustment.

[0090] Evaporation temperature refers to the temperature of the evaporator in the refrigeration system of a car refrigerator, i.e., the temperature at which the refrigerant evaporates in the evaporator, and it is positively correlated with the evaporation pressure. In the control system of a car refrigerator, evaporation temperature is a key parameter in the refrigeration cycle, directly affecting compressor efficiency and system stability.

[0091] In one feasible implementation, a high-precision temperature sensor can be installed at the evaporator outlet or a critical location to directly read the temperature of the evaporator surface or refrigerant. A high-temperature resistant and vibration-resistant sensor should be selected to adapt to the vehicle environment (e.g., temperatures above 55°C). In practical implementation, the sensor can be embedded in the inner wall of the evaporator piping to monitor the temperature of the refrigerant during evaporation in real time; the analog signal is transmitted to the control unit via an analog-to-digital converter for temperature calibration and filtering. This method allows for direct measurement, avoiding model errors, and is suitable for fast-response closed-loop control.

[0092] In another feasible implementation, the evaporation temperature of the refrigerant corresponds one-to-one with its saturation pressure. The evaporation temperature can be directly determined from the pressure value using a saturation pressure-temperature lookup table for each refrigerant type. In practice, a pressure sensor is installed at the evaporator outlet to obtain the evaporation pressure value; the control unit then uses a preset lookup table to convert the pressure into the evaporation temperature. This method is suitable for scenarios where a temperature sensor cannot be directly installed; pressure sensors are typically less expensive than multi-channel temperature sensors.

[0093] In another feasible implementation, a correlation model between evaporation temperature and system parameters can be established. Through experimental data or theoretical derivation, a mathematical model can be built that relates evaporation temperature to parameters such as compressor power, motor temperature rise, and ambient temperature. During actual implementation, parameters such as compressor power, motor temperature rise, and ambient temperature are collected in real time; the current evaporation temperature is calculated using a pre-trained regression model or empirical formula. This method reduces reliance on a single sensor and is suitable for temperature estimation under complex operating conditions.

[0094] In another feasible implementation, during the adjustment of refrigerant quantity or expansion valve opening, changes in compressor power and motor temperature rise are monitored. If the power or temperature rise exceeds a threshold, the evaporation temperature is inferred to be too high, and the control strategy is adjusted accordingly. In actual implementation, the compressor power is set to be less than or equal to a preset power and the motor temperature to be less than or equal to a preset temperature. The refrigerant quantity or expansion valve opening is dynamically adjusted through a PID controller to bring the system closer to the target value. Based on the stable state after adjustment, it is indirectly confirmed whether the evaporation temperature meets the target. This method does not require direct measurement of the evaporation temperature; control is achieved through overall performance optimization. It is suitable for scenarios where sensors fail or data is missing.

[0095] Step A222: Obtain the preset motor temperature and / or preset compressor power corresponding to the evaporation temperature.

[0096] Step A223: Obtain the motor temperature based on the preset motor temperature, and / or obtain the compressor power based on the preset compressor power.

[0097] The preset motor temperature is the evaporation temperature preset motor temperature established based on experimental data.

[0098] The preset compressor power is the compressor power preset based on experimental data and the evaporation temperature.

[0099] A mapping table between evaporation temperature, preset motor temperature, and preset compressor power can be pre-established. After obtaining the evaporation temperature, the corresponding preset motor temperature and / or preset compressor power can be obtained by looking up the mapping table. The obtained preset motor temperature and preset compressor power can be used as the current motor temperature and the obtained preset compressor power as the current compressor power, thus determining the current motor temperature and current compressor power. Monitoring the motor temperature and compressor power facilitates precise control of the vehicle-mounted refrigerator in the future.

[0100] In this embodiment, the evaporation temperature of the vehicle refrigerator after refrigerant quantity adjustment is obtained; the preset motor temperature and / or preset compressor power corresponding to the evaporation temperature are obtained; then the motor temperature is obtained based on the preset motor temperature, and / or the compressor power is obtained based on the preset compressor power; the motor temperature rise and compressor power are indirectly obtained through the evaporation temperature, which simplifies the complexity of direct measurement and improves the system's response speed and accuracy.

[0101] Furthermore, refer to Figure 4 If the motor temperature exceeds the preset temperature or the compressor power exceeds the preset power, the refrigerant flow of the vehicle refrigerator will be reduced and / or the process will be reversed to reduce the refrigerant quantity of the vehicle refrigerator, including:

[0102] Step A231: If the motor temperature is greater than the preset temperature or the compressor power is greater than the preset power, obtain the current refrigerant quantity of the vehicle refrigerator.

[0103] Step A232: If the current refrigerant level has not reached the minimum refrigerant level, return to execute the process of reducing the refrigerant level of the vehicle refrigerator.

[0104] The minimum refrigerant quantity refers to the minimum amount of refrigerant required for the vehicle refrigerator to operate normally, which can be set to 20 grams. If the current refrigerant quantity has not reached the minimum refrigerant quantity, it means that the refrigerant quantity of the vehicle refrigerator can still be adjusted. In this case, the process will return to reducing the refrigerant quantity of the vehicle refrigerator. Specifically, the refrigerant quantity of the vehicle refrigerator can be reduced according to the first adjustment cycle and the refrigerant quantity adjustment step size.

[0105] And / or, in step A233, if the current refrigerant level reaches the minimum refrigerant level, reduce the refrigerant flow of the vehicle refrigerator.

[0106] If the current refrigerant level has reached the minimum, further adjustment of the refrigerant level will prevent the vehicle refrigerator from working properly. In this case, you can stop adjusting the refrigerant level and reduce the refrigerant flow rate to reduce the corresponding motor temperature and / or compressor power.

[0107] In one feasible implementation, if the ambient temperature is higher than the set ambient temperature, the refrigerant quantity of the vehicle refrigerator is reduced according to the first adjustment cycle and refrigerant quantity adjustment step size; the motor temperature and / or compressor power of the vehicle refrigerator after refrigerant quantity adjustment are obtained; if the motor temperature is higher than the preset temperature or the compressor power is higher than the preset power, the current refrigerant quantity of the vehicle refrigerator is obtained; if the current refrigerant quantity has not reached the minimum refrigerant quantity, the process returns to reducing the refrigerant quantity of the vehicle refrigerator according to the first adjustment cycle and refrigerant quantity adjustment step size; the motor temperature and / or compressor power of the vehicle refrigerator after refrigerant quantity adjustment are obtained again; if the motor temperature is higher than the preset temperature or the compressor power is higher than the preset power, the current refrigerant quantity of the vehicle refrigerator is obtained; if the current refrigerant quantity has reached the minimum refrigerant quantity, the refrigerant flow rate of the vehicle refrigerator is reduced.

[0108] In another feasible implementation, if the ambient temperature is higher than the set ambient temperature, the refrigerant quantity of the vehicle refrigerator is reduced according to the first adjustment cycle and the refrigerant quantity adjustment step size; the motor temperature and / or compressor power of the vehicle refrigerator after the refrigerant quantity adjustment are obtained; if the motor temperature is higher than the preset temperature or the compressor power is higher than the preset power, the current refrigerant quantity of the vehicle refrigerator is obtained; if the current refrigerant quantity reaches the minimum refrigerant quantity, the refrigerant flow rate of the vehicle refrigerator is reduced.

[0109] In this embodiment, if the ambient temperature is higher than the set ambient temperature, the refrigerant quantity of the vehicle refrigerator is reduced according to the first adjustment cycle and refrigerant quantity adjustment step size; the motor temperature and / or compressor power of the vehicle refrigerator after refrigerant quantity adjustment are obtained; if the motor temperature is higher than the preset temperature or the compressor power is higher than the preset power, the current refrigerant quantity of the vehicle refrigerator is obtained; if the current refrigerant quantity has not reached the minimum refrigerant quantity, the process returns to reducing the refrigerant quantity of the vehicle refrigerator according to the first adjustment cycle and refrigerant quantity adjustment step size; and / or, if the current refrigerant quantity has reached the minimum refrigerant quantity, the refrigerant flow rate of the vehicle refrigerator is reduced. Precise adjustment is achieved through fixed step size and cycle; and a minimum refrigerant quantity protection is set to prevent complete loss of cooling capacity.

[0110] Furthermore, reducing the refrigerant load in vehicle refrigerators includes:

[0111] Step A211: Reduce the refrigerant quantity of the vehicle refrigerator according to the first adjustment cycle and refrigerant quantity adjustment step.

[0112] The first adjustment cycle refers to the time interval for adjusting the refrigerant quantity.

[0113] The refrigerant quantity adjustment step size refers to the amount of refrigerant added or subtracted each time the refrigerant quantity is adjusted; for example, it can be set to 2 grams.

[0114] In this embodiment, the refrigerant quantity of the vehicle refrigerator is adjusted in a step-by-step manner, with the refrigerant quantity being reduced in each adjustment cycle according to the refrigerant quantity adjustment step size. By reducing the refrigerant quantity in stages, system instability caused by sudden changes is avoided, and prioritizing refrigerant quantity adjustment reduces the frequency of operation of the electronic expansion valve.

[0115] Furthermore, the vehicle-mounted refrigerator includes a compressor, a first heat exchanger, an electronic expansion valve, a dryer filter, and a second heat exchanger connected in sequence. A first control valve is provided on a first flow path between the compressor and the first heat exchanger, and a liquid receiver is provided on a second flow path between the compressor and the second heat exchanger. A second control valve is provided between the liquid receiver and the compressor. The first control valve and the second control valve can be a shut-off valve, a solenoid valve, etc.

[0116] Reducing the refrigerant load in a car refrigerator includes:

[0117] Step B211: Determine the opening degree of the first control valve and / or the opening degree of the second control valve based on the refrigerant quantity adjustment step.

[0118] Step B212, reduce the current opening of the first control valve based on the opening of the first control valve, and / or reduce the current opening of the second control valve based on the opening of the second control valve.

[0119] A mapping relationship between the refrigerant quantity adjustment step size and the opening degree of the first control valve and / or the second control valve can be pre-established. Based on this mapping relationship, the opening degree of the first control valve and / or the second control valve can be determined.

[0120] In this embodiment, the amount of refrigerant flowing into the compressor is reduced by adjusting the opening of the first control valve, while the refrigerant return to the receiver is controlled by adjusting the opening of the second control valve. The openings of the two valves are adjusted in real time according to the refrigerant demand to maintain stable system pressure.

[0121] Furthermore, refer to Figure 5 Reducing the refrigerant flow of a vehicle refrigerator includes:

[0122] Step A234: Reduce the refrigerant flow of the vehicle refrigerator according to the second adjustment cycle and the electronic expansion valve opening adjustment step.

[0123] The second adjustment cycle refers to the time interval for adjusting the refrigerant flow, for example, set to 10 seconds.

[0124] The electronic expansion valve opening adjustment step size refers to the amount by which the electronic expansion valve opening size is reduced each time. The electronic expansion valve opening adjustment step size can be set to 10%.

[0125] This application employs a step-by-step adjustment of the electronic expansion valve opening of the vehicle refrigerator. In each adjustment cycle, the refrigerant flow to the vehicle refrigerator is reduced by a step size according to the electronic expansion valve opening adjustment; for example, the electronic expansion valve opening is reduced by 10% in each adjustment cycle. By reducing the electronic expansion valve opening in stages, system instability caused by sudden changes is avoided.

[0126] Step A235: Obtain the motor temperature and / or compressor power of the vehicle refrigerator after refrigerant flow adjustment.

[0127] After adjusting the refrigerant flow, obtain the evaporation temperature of the vehicle refrigerator; obtain the preset motor temperature and / or preset compressor power corresponding to the evaporation temperature; obtain the motor temperature based on the preset motor temperature, and / or obtain the compressor power based on the preset compressor power.

[0128] Step A236: If the motor temperature is greater than the preset temperature or the compressor power is greater than the preset power, obtain the current electronic expansion valve opening of the vehicle refrigerator.

[0129] Step A237: If the current electronic expansion valve opening has not reached the minimum electronic expansion valve opening, return to the step of reducing the refrigerant flow of the vehicle refrigerator according to the second adjustment cycle and the electronic expansion valve opening adjustment step.

[0130] The minimum electronic expansion valve opening refers to the minimum opening of the electronic expansion valve required for the vehicle refrigerator to operate normally, such as 40%. If the current electronic expansion valve opening has not reached the minimum electronic expansion valve opening, it means that the refrigerant flow of the vehicle refrigerator can still be adjusted. The refrigerant flow of the vehicle refrigerator can be reduced according to the second adjustment cycle and the electronic expansion valve opening adjustment step.

[0131] And / or, in step A238, if the current electronic expansion valve opening reaches the minimum electronic expansion valve opening, stop adjusting the refrigerant flow and control the compressor of the vehicle refrigerator to stop.

[0132] In one feasible implementation, the ambient temperature inside the vehicle where the vehicle-mounted refrigerator is located is obtained; if the ambient temperature is higher than the set ambient temperature, the refrigerant quantity of the vehicle-mounted refrigerator is reduced; the motor temperature and / or compressor power of the vehicle-mounted refrigerator corresponding to the refrigerant quantity adjustment are obtained; if the motor temperature is higher than the preset temperature or the compressor power is higher than the preset power, the refrigerant flow rate of the vehicle-mounted refrigerator is reduced according to the second adjustment cycle and the electronic expansion valve opening adjustment step; the motor temperature and / or compressor power of the vehicle-mounted refrigerator corresponding to the refrigerant flow rate adjustment are obtained; if the motor temperature is higher than the preset temperature or the compressor power is higher than the preset power, the current electronic expansion valve opening of the vehicle-mounted refrigerator is obtained; if the current electronic expansion valve opening has not reached the minimum electronic expansion valve opening, the step of reducing the refrigerant flow rate of the vehicle-mounted refrigerator according to the second adjustment cycle and the electronic expansion valve opening adjustment step is returned to execution; and / or, if the current electronic expansion valve opening reaches the minimum electronic expansion valve opening, the adjustment of the refrigerant flow rate is stopped, and the compressor of the vehicle-mounted refrigerator is controlled to stop.

[0133] In another feasible implementation, the ambient temperature inside the vehicle where the vehicle refrigerator is located is obtained; if the ambient temperature is higher than the set ambient temperature, the refrigerant quantity of the vehicle refrigerator is reduced according to the first adjustment cycle and the refrigerant quantity adjustment step size; the motor temperature and / or compressor power corresponding to the vehicle refrigerator after the refrigerant quantity adjustment are obtained; if the motor temperature is higher than the preset temperature or the compressor power is higher than the preset power, the current refrigerant quantity of the vehicle refrigerator is obtained; if the current refrigerant quantity has not reached the minimum refrigerant quantity, the process returns to reducing the refrigerant quantity of the vehicle refrigerator according to the first adjustment cycle and the refrigerant quantity adjustment step size; and / or, if the current refrigerant quantity has reached the minimum refrigerant quantity, the process proceeds according to the second adjustment cycle. The system adjusts the refrigerant flow of the vehicle refrigerator by adjusting the electronic expansion valve opening step size; it obtains the motor temperature and / or compressor power of the vehicle refrigerator after the refrigerant flow adjustment; if the motor temperature is greater than the preset temperature or the compressor power is greater than the preset power, it obtains the current electronic expansion valve opening of the vehicle refrigerator; if the current electronic expansion valve opening does not reach the minimum electronic expansion valve opening, it returns to the step of reducing the refrigerant flow of the vehicle refrigerator according to the second adjustment cycle and the electronic expansion valve opening adjustment step size; and / or, if the current electronic expansion valve opening reaches the minimum electronic expansion valve opening, it stops adjusting the refrigerant flow and controls the compressor of the vehicle refrigerator to stop.

[0134] In this embodiment, the refrigerant flow of the vehicle refrigerator is reduced according to a second adjustment cycle and an electronic expansion valve opening adjustment step size; the motor temperature and / or compressor power of the vehicle refrigerator after refrigerant flow adjustment are obtained; if the motor temperature is greater than a preset temperature or the compressor power is greater than a preset power, the current electronic expansion valve opening of the vehicle refrigerator is obtained; if the current electronic expansion valve opening does not reach the minimum electronic expansion valve opening, the process returns to the step of reducing the refrigerant flow of the vehicle refrigerator according to the second adjustment cycle and electronic expansion valve opening adjustment step size; and / or, if the current electronic expansion valve opening reaches the minimum electronic expansion valve opening, the adjustment of the refrigerant flow is stopped, and the compressor of the vehicle refrigerator is shut down. By gradually reducing the refrigerant flow, sudden changes in system pressure are avoided; and the compressor overload burnout is prevented through a shutdown protection mechanism.

[0135] Based on the above embodiments, in some embodiments of this application, if the ambient temperature is higher than the set ambient temperature, reducing the refrigerant quantity and / or refrigerant flow of the vehicle refrigerator includes:

[0136] Step C21: If the ambient temperature is higher than the set ambient temperature, reduce the amount and / or flow of refrigerant in the vehicle refrigerator.

[0137] Step C22: Obtain the motor temperature and / or compressor power of the vehicle refrigerator after adjusting the refrigerant quantity and / or refrigerant flow rate.

[0138] Step C23: If the motor temperature is greater than the preset temperature or the compressor power is greater than the preset power, return to the step of reducing the amount and / or flow of refrigerant in the vehicle refrigerator.

[0139] And / or, in step C24, if the motor temperature is less than or equal to the preset temperature and the compressor power is less than or equal to the preset power, stop adjusting the refrigerant quantity and / or refrigerant flow of the vehicle refrigerator.

[0140] The preset temperature and preset power are fixed at the factory through testing, or they can be manually set during vehicle use. The preset temperature can be set to 140℃ or 125W.

[0141] To make the control process of the vehicle refrigerator more stable, the amount and / or flow of refrigerant can be gradually adjusted in stages to improve the stability of the vehicle refrigerator's cooling effect.

[0142] In one feasible implementation, if the ambient temperature is higher than the set ambient temperature, the refrigerant level of the vehicle refrigerator is reduced. The motor temperature and / or compressor power corresponding to the refrigerant level adjustment are obtained. If the motor temperature is higher than the preset temperature or the compressor power is higher than the preset power, the process returns to reducing the refrigerant level. If the motor temperature is lower than or equal to the preset temperature and the compressor power is lower than or equal to the preset power, the adjustment of the refrigerant level is stopped. When the refrigerant level decreases, the evaporation temperature decreases; when the evaporation temperature decreases, the motor temperature and / or compressor power also decrease, achieving the effect of reducing the motor temperature and / or compressor power.

[0143] In another feasible implementation, if the ambient temperature is higher than the set ambient temperature, the refrigerant flow of the vehicle refrigerator is reduced. The motor temperature and / or compressor power of the vehicle refrigerator are obtained after the refrigerant flow adjustment. If the motor temperature is higher than the preset temperature or the compressor power is higher than the preset power, the process returns to reducing the refrigerant flow of the vehicle refrigerator. If the motor temperature is less than or equal to the preset temperature and the compressor power is less than or equal to the preset power, the adjustment of the refrigerant flow of the vehicle refrigerator is stopped. When the refrigerant flow decreases, the evaporation temperature decreases; when the evaporation temperature decreases, the motor temperature and / or compressor power also decrease, achieving the effect of reducing the motor temperature and / or compressor power.

[0144] In another feasible implementation, if the ambient temperature is higher than the set ambient temperature, the refrigerant quantity and flow rate of the vehicle refrigerator are reduced. The motor temperature and / or compressor power of the vehicle refrigerator are obtained after the refrigerant quantity and flow rate are adjusted. If the motor temperature is higher than the preset temperature or the compressor power is higher than the preset power, the process returns to reducing the refrigerant quantity and flow rate. If the motor temperature is lower than or equal to the preset temperature and the compressor power is lower than or equal to the preset power, the adjustment of the refrigerant quantity and flow rate of the vehicle refrigerator is stopped. When the refrigerant quantity and flow rate decrease, the evaporation temperature decreases; when the evaporation temperature decreases, the motor temperature and / or compressor power also decrease, achieving the effect of reducing the motor temperature and / or compressor power.

[0145] The above methods can be used to reduce the refrigerant quantity, the refrigerant flow rate, or both simultaneously, thereby reducing the motor temperature and / or compressor power. If the method of simultaneously reducing the refrigerant quantity and flow rate is chosen, the refrigerant quantity can be reduced first, followed by the refrigerant flow rate, to achieve the same effect. Alternatively, the refrigerant flow rate can be reduced first, followed by the refrigerant quantity.

[0146] In this embodiment, if the ambient temperature is higher than the set ambient temperature, the refrigerant quantity and / or refrigerant flow rate of the vehicle refrigerator are reduced, and the decrease in motor temperature and / or compressor power of the vehicle refrigerator after the refrigerant quantity and / or refrigerant flow rate of the vehicle refrigerator is monitored in real time. By continuously adjusting the refrigerant quantity and / or refrigerant flow rate of the vehicle refrigerator, the motor temperature and compressor power of the vehicle refrigerator are controlled to be less than or equal to the preset temperature, thereby improving the cooling effect of the vehicle refrigerator.

[0147] Furthermore, after obtaining and adjusting the refrigerant quantity and / or refrigerant flow, the corresponding motor temperature and / or compressor power of the vehicle refrigerator include:

[0148] Step C221: Obtain the evaporation temperature of the vehicle refrigerator after adjusting the refrigerant quantity and / or refrigerant flow rate.

[0149] Step C222: Obtain the preset motor temperature and / or preset compressor power corresponding to the evaporation temperature.

[0150] Step C223: Obtain the motor temperature based on the preset motor temperature, and / or obtain the compressor power based on the preset compressor power.

[0151] In this embodiment, the evaporation temperature of the vehicle refrigerator is obtained after the refrigerant quantity and / or refrigerant flow rate are adjusted; the preset motor temperature and / or preset compressor power corresponding to the evaporation temperature are obtained; then the motor temperature is obtained based on the preset motor temperature, and / or the compressor power is obtained based on the preset compressor power; the motor temperature rise and compressor power are indirectly obtained through the evaporation temperature, which simplifies the complexity of direct measurement and improves the system's response speed and accuracy.

[0152] It should be noted that the above examples are only for understanding this application and do not constitute a limitation on the control method of the vehicle refrigerator in this application. Any simple modifications based on this technical concept are within the protection scope of this application.

[0153] Based on the same inventive concept, this application provides a vehicle refrigerator, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, which are executed by the at least one processor to enable the at least one processor to perform the vehicle refrigerator control method in the above embodiments.

[0154] The following is for reference. Figure 6The diagram illustrates a structural schematic suitable for implementing the embodiments of this application of a vehicle-mounted refrigerator. The vehicle-mounted refrigerator in the embodiments of this application may include, but is not limited to, mobile terminals such as mobile phones, laptops, digital radio receivers, personal digital assistants (PDAs), tablet computers (PADs), portable media players (PMPs), vehicle-mounted terminals (e.g., vehicle navigation terminals), and fixed terminals such as digital TVs and desktop computers. Figure 6 The vehicle refrigerator shown is merely an example and should not be construed as limiting the functionality and scope of use of the embodiments of this application.

[0155] like Figure 6 As shown, the vehicle refrigerator may include a processing unit 1001 (e.g., a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in read-only memory (ROM) 1002 or a program loaded from storage device 1003 into random access memory (RAM) 1004. The random access memory 1004 also stores various programs and data required for the operation of the vehicle refrigerator. The processing unit 1001, ROM 1002, and RAM 1004 are interconnected via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to I / O interface 1006: input devices 1007 including, for example, touchscreens, touchpads, keyboards, mice, image sensors, microphones, accelerometers, gyroscopes, etc.; output devices 1008 including, for example, liquid crystal displays (LCDs), speakers, vibrators, etc.; storage devices 1003 including, for example, magnetic tapes, hard disks, etc.; and communication devices 1009. Communication device 1009 allows the vehicle refrigerator to communicate wirelessly or wiredly with other devices to exchange data. Although a vehicle refrigerator with various systems is shown in the figure, it should be understood that it is not required to implement or possess all the systems shown. More or fewer systems can be implemented alternatively.

[0156] Specifically, according to the embodiments disclosed in this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments disclosed in this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication device, or installed from storage device 1003, or installed from read-only memory 1002. When the computer program is executed by processing device 1001, it performs the functions defined in the methods of the embodiments disclosed in this application.

[0157] The vehicle-mounted refrigerator provided in this application, employing the control method described in the above embodiments, can solve the technical problem of poor cooling performance caused by the vehicle-mounted refrigerator failing to start normally in high-temperature environments. Compared with the prior art, the beneficial effects of the vehicle-mounted refrigerator provided in this application are the same as those of the control method described in the above embodiments, and other technical features of this vehicle-mounted refrigerator are the same as those disclosed in the previous embodiment method, and will not be repeated here.

[0158] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0159] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0160] Based on the same inventive concept, this application provides a computer-readable storage medium having computer-readable program instructions (i.e., computer programs) stored thereon, which are used to execute the vehicle refrigerator control method in the above embodiments.

[0161] The computer-readable storage medium provided in this application may be, for example, a USB flash drive, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections having one or more wires, portable computer disks, hard disks, random access memory, read-only memory, erasable programmable read-only memory (EPROM), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, system, or device. The program code contained on the computer-readable storage medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, radio frequency (RF), etc., or any suitable combination thereof.

[0162] The aforementioned computer-readable storage medium may be included in the vehicle refrigerator; or it may exist independently and not be installed in the vehicle refrigerator.

[0163] The aforementioned computer-readable storage medium carries one or more programs that, when executed by the vehicle refrigerator, enable the vehicle refrigerator to acquire the ambient temperature inside the vehicle where the vehicle refrigerator is located; if the ambient temperature is higher than the set ambient temperature, reduce the amount and / or flow of refrigerant in the vehicle refrigerator to reduce the motor temperature and / or compressor power of the vehicle refrigerator.

[0164] Computer program code for performing the operations of this application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a Local Area Network (LAN) or a Wide Area Network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0165] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0166] The modules described in the embodiments of this application can be implemented in software or hardware. The names of the modules do not necessarily limit the functionality of the unit itself.

[0167] The readable storage medium provided in this application is a computer-readable storage medium that stores computer-readable program instructions (i.e., a computer program) for executing the control method of the vehicle refrigerator described above. This solves the technical problem that the vehicle refrigerator cannot start normally in high-temperature environments, resulting in poor cooling performance. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as those of the control method of the vehicle refrigerator provided in the above embodiments, and will not be repeated here.

[0168] The above are only some embodiments of this application and do not limit the patent scope of this application. All equivalent structural transformations made under the technical concept of this application and using the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included in the patent protection scope of this application.

Claims

1. A control method for a vehicle-mounted refrigerator, characterized in that, The control method for the vehicle-mounted refrigerator includes: Obtain the ambient temperature inside the vehicle where the in-vehicle refrigerator is located; If the ambient temperature is higher than the set ambient temperature, reduce the amount and / or flow of refrigerant in the vehicle refrigerator to reduce the motor temperature and / or compressor power of the vehicle refrigerator.

2. The control method for a vehicle-mounted refrigerator as described in claim 1, characterized in that, If the ambient temperature is higher than the set ambient temperature, reducing the refrigerant quantity and / or refrigerant flow of the vehicle refrigerator includes: If the ambient temperature is higher than the set ambient temperature, reduce the amount of refrigerant in the vehicle refrigerator; Obtain the motor temperature and / or compressor power of the vehicle refrigerator after the refrigerant quantity is adjusted; If the motor temperature is greater than a preset temperature or the compressor power is greater than a preset power, reduce the refrigerant flow rate of the vehicle refrigerator and / or return to the previous operation to reduce the refrigerant quantity of the vehicle refrigerator; and / or, If the motor temperature is less than or equal to the preset temperature and the compressor power is less than or equal to the preset power, the adjustment of the refrigerant flow rate and / or the refrigerant quantity shall be stopped.

3. The control method for a vehicle-mounted refrigerator as described in claim 2, characterized in that, The motor temperature and / or compressor power of the vehicle refrigerator after the refrigerant quantity adjustment include: The evaporation temperature of the vehicle refrigerator is obtained after the refrigerant quantity is adjusted. Obtain the preset motor temperature and / or preset compressor power corresponding to the evaporation temperature; The motor temperature is obtained based on the preset motor temperature, and / or the compressor power is obtained based on the preset compressor power.

4. The control method for a vehicle-mounted refrigerator as described in claim 2, characterized in that, The step of reducing the refrigerant flow of the vehicle refrigerator and / or returning to reduce the refrigerant quantity of the vehicle refrigerator if the motor temperature is greater than the preset temperature or the compressor power is greater than the preset power includes: If the motor temperature is greater than the preset temperature or the compressor power is greater than the preset power, obtain the current refrigerant quantity of the vehicle refrigerator; If the current refrigerant level is not at the minimum refrigerant level, return to the step of reducing the refrigerant level of the vehicle refrigerator; and / or, If the current refrigerant level reaches the minimum refrigerant level, reduce the refrigerant flow rate of the vehicle refrigerator.

5. The control method for a vehicle-mounted refrigerator as described in any one of claims 1 to 4, characterized in that, The reduction of the refrigerant quantity in the vehicle refrigerator includes: The refrigerant quantity of the vehicle-mounted refrigerator is reduced according to the first adjustment cycle and the refrigerant quantity adjustment step.

6. The control method for a vehicle-mounted refrigerator as described in claim 2, characterized in that, The vehicle-mounted refrigerator includes a compressor, a first heat exchanger, an electronic expansion valve, a dryer filter, and a second heat exchanger connected in sequence. A first control valve is provided in a first flow path between the compressor and the first heat exchanger. A liquid receiver is provided in a second flow path between the compressor and the second heat exchanger. A second control valve is provided between the liquid receiver and the compressor. Reducing the refrigerant quantity of the vehicle-mounted refrigerator includes: The opening degree of the first control valve and / or the opening degree of the second control valve are determined according to the refrigerant quantity adjustment step. The opening degree of the first control valve is reduced based on the opening degree of the first control valve, and / or the opening degree of the second control valve is reduced based on the opening degree of the second control valve.

7. The control method for a vehicle-mounted refrigerator as described in claim 2 or 4, characterized in that, The reduction of the refrigerant flow of the vehicle refrigerator includes: The refrigerant flow of the vehicle refrigerator is reduced according to the second adjustment cycle and the electronic expansion valve opening adjustment step. Obtain the motor temperature and / or compressor power of the vehicle refrigerator after refrigerant flow adjustment; If the motor temperature is greater than the preset temperature or the compressor power is greater than the preset power, obtain the current electronic expansion valve opening of the vehicle refrigerator; If the current electronic expansion valve opening does not reach the minimum electronic expansion valve opening, return to the step of reducing the refrigerant flow of the vehicle refrigerator according to the second adjustment cycle and the electronic expansion valve opening adjustment step size; and / or, If the current electronic expansion valve opening reaches the minimum electronic expansion valve opening, the adjustment of the refrigerant flow will stop, and the compressor of the vehicle refrigerator will be shut down.

8. A vehicle-mounted refrigerator, characterized in that, The vehicle-mounted refrigerator includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the control method for the vehicle-mounted refrigerator as described in any one of claims 1 to 7.

9. A vehicle, characterized in that, The vehicle includes the vehicle-mounted refrigerator as described in claim 8.

10. A storage medium, characterized in that, The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, it implements the steps of the vehicle refrigerator control method as described in any one of claims 1 to 7.

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