Control method and system of integrated vehicle-mounted refrigerator and medium

Abstract

The invention relates to a control method and system of an integrated vehicle-mounted refrigerator and a medium, and relates to the technical field of new energy automobiles. The method comprises the steps that whether the vehicle-mounted refrigerator reaches a set temperature or not is detected; if the temperature does not reach the set temperature, a whole vehicle compressor is started; detecting whether the compressor triggers low-pressure protection or not; and triggering low-voltage protection, and starting the cooler to perform heat compensation on the low-voltage loop. The low-pressure loop is subjected to heat compensation under the working condition in winter, the problem that the integrated vehicle-mounted refrigerator cannot be used due to low-pressure protection of the compressor in winter is solved, and the application range of the integrated vehicle-mounted refrigerator is widened.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicles, and in particular to a control method, system and medium for an integrated in-vehicle refrigerator. Background Art

[0002] With the development of the automotive industry, more and more people regard cars as a second "home". As one of the important household appliances in daily life, refrigerators have gradually become a common option in vehicle configurations. Currently, in-vehicle refrigerators are mainly divided into two types: independent and integrated. The independent refrigerator is relatively independent of the vehicle system and only requires the vehicle to provide power. The integrated refrigerator uses the compressor of the vehicle thermal management system to provide refrigeration power, and the cooling speed is relatively fast.

[0003] However, both types of in-vehicle refrigerators have some limitations. Due to the limitation of the power supply, the refrigeration capacity of the independent refrigerator is relatively weak. Although the integrated refrigerator has a good refrigeration effect, it is prone to the problem of low-pressure protection of the compressor under winter conditions, which affects the normal operation of the refrigerator. Especially in the winter environment where the passenger compartment does not require refrigeration, the large displacement of the vehicle compressor is more likely to trigger the low-pressure protection mechanism. These problems limit the practicality of in-vehicle refrigerators in different seasons and usage scenarios and are difficult to meet the needs of users throughout the year. Summary of the Invention

[0004] In view of the above-mentioned disadvantages of the prior art, the purpose of the present invention is to provide a control method, system and medium for an integrated in-vehicle refrigerator, which solves the problem that the integrated in-vehicle refrigerator cannot be used due to compressor low-pressure protection in winter by heating the low-pressure circuit under winter conditions, and broadens the usage range of the integrated in-vehicle refrigerator.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions.

[0006] In a first aspect, a control method for an integrated in-vehicle refrigerator provided by the present invention adopts the following technical solutions: Detect whether the in-vehicle refrigerator reaches the set temperature; If the set temperature is not reached, start the vehicle compressor; Detect whether the compressor triggers low-pressure protection; When low-pressure protection is triggered, start the cooler to heat the low-pressure circuit.

[0007] Further, in the above control method, when low-pressure protection is triggered and the cooler is started to heat the low-pressure circuit, it includes: Start the cooler; Control the cooler to heat the low-pressure circuit; Detect whether the compressor still triggers low-pressure protection.

[0008] Further, in the above control method, after detecting whether the compressor still triggers low-pressure protection, it further includes: If the compressor still triggers low-pressure protection, increase the heat compensation power of the cooler.

[0009] Further, in the above control method, the step of increasing the heat compensation power of the cooler when the compressor still triggers low-pressure protection includes: Judge the heating demand level of the low-pressure circuit; Select the corresponding heating method according to the heating demand level.

[0010] Further, in the above control method, the heating demand level includes the first level, the second level, and the third level, where: The first level adopts the battery heating method; The second level adopts the motor heating method; The third level adopts the water heater heating method.

[0011] Further, in the above control method, it further includes: If the heating amount of the current heating method is insufficient, switch to a higher-level heating method.

[0012] Further, in the above control method, the step of detecting whether the vehicle-mounted refrigerator reaches the set temperature includes: Obtain the current temperature of the vehicle-mounted refrigerator; Compare the current temperature with the preset temperature.

[0013] Further, in the above control method, the step of detecting whether the compressor triggers low-pressure protection includes: Detect the suction pressure of the compressor; Judge whether the suction pressure is lower than the preset threshold.

[0014] In a second aspect, a control system for an integrated vehicle-mounted refrigerator provided by the present invention adopts the following technical solution: A temperature detection module for detecting whether the vehicle-mounted refrigerator reaches the set temperature; A compressor control module for starting the vehicle compressor when the set temperature is not reached; A low-pressure protection detection module for detecting whether the compressor triggers low-pressure protection; A heat compensation control module for starting the cooler to heat the low-pressure circuit when low-pressure protection is triggered.

[0015] Further, in the above control system, the heat compensation control module is further configured to: Judge the heating demand level of the low-pressure circuit; Select the corresponding heating method according to the heating demand level, where the heating demand level includes the first level, the second level, and the third level. The first level uses battery heating, the second level uses motor heating, and the third level uses a water heater for heating; If the heating capacity of the current heating method is insufficient, switch to a higher-level heating method.

[0016] In a third aspect, a readable storage medium provided by the present invention adopts the following technical solution: A readable storage medium stores computer instructions, and when the computer instructions are executed by a processor, the control method described in any one of the above first aspects is implemented.

[0017] In summary, compared with the prior art, the present invention includes at least one of the following beneficial technical effects: By starting the cooler to supplement heat to the low-pressure circuit under winter conditions, the present invention solves the problem that the integrated vehicle-mounted refrigerator cannot be used due to low-pressure protection of the compressor in winter, and broadens the usage range of the integrated vehicle-mounted refrigerator; by selecting different heating methods according to the heating demand level, precise control of the low-pressure circuit is achieved, and the operating efficiency and stability of the system are improved. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a structural diagram of an integrated vehicle-mounted refrigerator system of the present invention.

[0020] Figure 2 It is a flowchart of a specific embodiment of a control method for an integrated vehicle-mounted refrigerator of the present invention.

[0021] Figure 3 It is a flowchart of another specific embodiment of a control method for an integrated vehicle-mounted refrigerator of the present invention.

[0022] Figure 4 It is a structural schematic diagram of a specific embodiment of an integrated vehicle-mounted refrigerator control system of the present invention. Detailed Embodiments

[0023] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. 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. In addition, it should be understood that the specific implementation manners described herein are only used to illustrate and explain the present application, and are not used to limit the present application.

[0024] It should be noted that the description order of the following embodiments does not limit the preferred order of the embodiments of the present application. And in the following embodiments, each embodiment is described with its own emphasis. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0025] In the embodiments of the present invention, for the method steps described, the execution order can be the order described in the specific implementation manner, or can be adjusted according to actual needs on the premise of being able to solve the technical problem. The execution order of each step will not be listed one by one here.

[0026] An in-vehicle integrated refrigerator refers to a type of refrigerator that is deeply integrated with the vehicle's thermal management system. Different from traditional standalone refrigerators, it does not rely on the vehicle's low-voltage power supply for independent refrigeration, but uses the compressor in the vehicle's thermal management system for refrigeration, achieving stronger refrigeration capacity and faster cooling speed. This type of refrigerator usually operates in cooperation with components such as a battery chiller and a refrigerant circuit, and is suitable for new energy vehicle scenarios with high requirements for refrigeration efficiency.

[0027] Refer to Figure 1 , a structural diagram of an integrated in-vehicle refrigerator system for new energy vehicles. Among them, the vehicle's thermal management system is connected to the Chiller (battery chiller) and the integrated in-vehicle refrigerator respectively through refrigerant pipelines to establish a refrigeration circuit. On the side of the Chiller, it is connected to a multi-way water valve (MUVLV), which can be selectively connected to the WPTC (water heater), EDS (motor), and ESS (battery) according to the system control strategy, so as to provide a heat source for the Chiller.

[0028] Based on the above structure, refer to Figure 2 , the present invention provides an integrated in-vehicle refrigerator control method, including the following steps: detecting whether the in-vehicle refrigerator reaches the set temperature; if it does not reach the set temperature, starting the vehicle's compressor; detecting whether the compressor triggers low-voltage protection; triggering low-voltage protection and starting the cooler to heat the low-voltage circuit.

[0029] Among them, the detection of whether the in-vehicle refrigerator reaches the set temperature includes: obtaining the current temperature of the in-vehicle refrigerator; comparing the current temperature with the preset temperature.

[0030] Specifically, an independent temperature sensor can be set inside the in-vehicle refrigerator. By collecting the temperature data inside the box body and comparing it with the preset temperature threshold, it is judged whether the set temperature is reached. In some embodiments, the refrigerator temperature information can be uniformly collected and managed by the vehicle's thermal management system. The current temperature status is obtained by communicating with the vehicle's central control unit and judged. In some other embodiments, the refrigerator controller can indirectly calculate the internal temperature of the refrigerator through the temperature sensor set in the refrigerant circuit for judging whether the set temperature requirement is met. In some other embodiments, temperature sensors can also be arranged at multiple positions inside the refrigerator. By comparing the temperatures at each point to calculate the average value or the maximum / minimum value, and then comparing it with the set temperature, the accuracy of temperature judgment can be improved. In some further embodiments, the user can also remotely set or read the target temperature through the vehicle-mounted system or the mobile terminal, and the system judges whether the current temperature reaches the set value accordingly.

[0031] In some embodiments, after the refrigerator controller judges that the set temperature is not reached, it can directly send a request instruction to start the compressor to the vehicle control system, and the vehicle control system completes the start control of the compressor. In some other embodiments, the refrigerator controller can be part of the thermal management system. By integrating with the thermal management control unit, the control logic of automatically calling the compressor can be realized without additional communication instructions. In some other embodiments, the start of the compressor is uniformly scheduled by the vehicle's energy management strategy. The refrigerator system only provides a refrigeration demand signal, and the vehicle system makes a start judgment of the compressor under the conditions of meeting power and energy consumption. In some further embodiments, the user can also set the refrigerator to the "forced refrigeration" mode through the central control screen or the mobile App. After receiving this instruction, the system preferentially starts the compressor to meet the refrigeration demand.

[0032] Further, the detection of whether the compressor triggers low-pressure protection includes: detecting the suction pressure of the compressor; judging whether the suction pressure is lower than the preset threshold.

[0033] Specifically, the pressure value can be monitored in real time through the pressure sensor at the low-pressure end of the compressor. When it is lower than the set threshold, it is determined that the low-pressure protection is triggered, and the cooler is started to heat up the low-pressure circuit. In some embodiments, whether the low-pressure protection occurs can be identified through the fault code or operating status information returned by the compressor controller, and the cooler is controlled to intervene and operate accordingly. In some embodiments, based on parameters such as the suction temperature of the compressor, the ambient temperature, and the operating time, an algorithm model can be used to predict whether there is a low-pressure risk, and the cooler can be started in advance for preheating intervention to prevent the occurrence of low-pressure protection. In still some other embodiments, the heat supply operation of the cooler is switched to heat sources such as WPTC, battery, or motor through a multi-way water valve, and the specific heat source selection is determined by the current heat source temperature and availability. In some further embodiments, the start of the cooler also includes linkage operations such as water pump speed regulation and water valve adjustment to achieve precise heat control of the low-pressure circuit and improve the operating stability of the compressor.

[0034] The integrated in-vehicle refrigerator control method provided by the embodiments of the present invention can effectively solve the problem that the traditional integrated in-vehicle refrigerator cannot operate due to low-pressure protection of the compressor in winter by detecting the refrigerator temperature, intelligently controlling the start of the compressor, and timely enabling the cooler to heat up the low-pressure circuit when the compressor triggers the low-pressure protection. This method makes full use of the existing vehicle thermal management system and waste heat resources, improves the adaptability and stability of the system in low-temperature environments, realizes the reliable operation of the in-vehicle refrigerator under winter conditions, thus significantly broadening the applicable range of the integrated in-vehicle refrigerator and improving the user experience and vehicle comfort.

[0035] Further, as an embodiment of the present invention, the triggering of the low-pressure protection and starting the cooler to heat up the low-pressure circuit includes: starting the cooler; controlling the cooler to heat up the low-pressure circuit; and detecting whether the compressor still triggers the low-pressure protection.

[0036] Specifically, during the process of starting the cooler to supplement heat to the low-pressure circuit, the suction pressure of the compressor is continuously monitored by the low-pressure side pressure sensor. During the heat supplement process, the pressure value is compared in real time to determine whether it has returned to the normal range, so as to judge whether the low-pressure protection is released. In some embodiments, the compressor controller periodically returns the operating status code or fault information, and it can be judged whether it is still in the low-pressure protection state according to the returned result. In some embodiments, indirect parameters such as the operating current, speed, or vibration characteristics of the compressor can be monitored, and combined with a preset model to judge whether there are low-pressure protection characteristics. In some other embodiments, a heat supplement time threshold can be set in advance. After heat supplement for a certain time, the suction pressure is re-detected to see if it has returned to normal. If not, it is considered that it is still in the low-pressure protection state, and the next control strategy is executed. In some further embodiments, the current operating condition of the compressor can be comprehensively analyzed in combination with the ambient temperature, refrigerant temperature, and heat source temperature to judge whether the heat supplement is effective and whether it is necessary to switch the heat source or adjust the heat supplement intensity to release the low-pressure protection state. By implementing the above embodiments, accurate identification of the low-pressure protection state can be achieved, ensuring the effectiveness of the heat supplement measures, thereby dynamically adjusting the thermal management strategy and improving the operating efficiency of the compressor and the stability of the in-vehicle refrigerator.

[0037] Further, as an embodiment of the present invention, after detecting whether the compressor still triggers low-pressure protection, it further includes: if the compressor still triggers low-pressure protection, increasing the heat supplement power of the cooler.

[0038] Specifically, if the compressor still triggers low-pressure protection, the heating power of the water heater (WPTC) can be increased to increase the heat transferred to the cooler, so as to enhance the heat supplement effect on the low-pressure circuit. In some embodiments, the flow rate of the cooler circulation pump can be increased to improve the heat exchange efficiency between the heat medium in the cooler and the low-pressure circuit, thereby achieving a stronger heat supplement ability. In some other embodiments, the multi-way water valve can be switched or more heat sources can be connected in parallel, such as the waste heat of the battery (ESS) and the motor (EDS), to further improve the overall heat supplement ability of the cooler. In some other embodiments, the operating time and intermittent frequency of the cooler can be dynamically adjusted to achieve fine control of heat output.

[0039] By implementing the above embodiments, the heat supplement intensity can be effectively increased when the compressor is continuously in the low-pressure protection state, the low-pressure recovery speed can be accelerated, and the adaptability of the system to extreme low-temperature environments can be enhanced, thereby ensuring the continuous and stable operation of the integrated in-vehicle refrigerator.

[0040] Further, referring to Figure 3 , as an embodiment of the present invention, the step of increasing the heat supplement power of the cooler if the compressor still triggers low-pressure protection includes: judging the heating demand level of the low-pressure circuit; and selecting the corresponding heating method according to the heating demand level.

[0041] The heating demand levels include a first level, a second level, and a third level, where: the first level uses battery heating; the second level uses motor heating; the third level uses a water heater for heating.

[0042] If the heating amount of the current heating method is insufficient, switch to a higher-level heating method.

[0043] In some embodiments, by collecting parameters such as the pressure value on the low-pressure side of the compressor, the refrigerant temperature, and the temperature difference between the inlet and outlet of the cooler in real time, combining with the ambient temperature, the current operating state of the compressor, and the heat compensation response time, a preset multi-level judgment logic is used to determine the heating level required for the current low-pressure circuit.

[0044] Specifically, when the low-pressure value is slightly on the low side, it is judged as a first-level heating demand, and the battery (ESS) is preferentially called as the heat source. At this time, the multi-way water valve (MUVLV) is controlled to connect the battery circuit to the cooler, and the low-pressure circuit is slightly heat-compensated by the waste heat generated by the battery operation.

[0045] When it is detected that the heat compensation effect is insufficient or the low-pressure value further decreases, it is judged as a second-level heating demand. On the basis of retaining battery heating, the motor (EDS) is further enabled as the second heat source, and the waste heat of the motor is introduced into the cooler by controlling the valve switching to enhance the heat output.

[0046] If the above two-level heat compensation still cannot enable the compressor to get out of the low-pressure protection, or it is detected that the current ambient temperature is extremely low and the refrigerant pressure is much lower than the set threshold, it is judged as a third-level heating demand. At this time, the water heater (WPTC) is started as a high-power active heat source for heating, and the outlet temperature of the cooler is increased by adjusting the power level of the WPTC to achieve the maximum-intensity heat compensation for the low-pressure circuit.

[0047] In addition, in some embodiments, there is also a heat source priority strategy and a dynamic heat source switching mechanism, which dynamically evaluate the optimal combination according to the current temperature, energy consumption level, and availability of each heat source to improve the heat efficiency and system response speed.

[0048] By implementing the above multi-level heating control strategy, it is possible to flexibly handle the compressor low-pressure protection problem under different working conditions, achieve precise, energy-saving, and efficient heat compensation control, and ensure the continuous and stable operation of the in-vehicle refrigerator in a low-temperature environment.

[0049] The embodiment of the present invention also discloses a control system for an integrated in-vehicle refrigerator.

[0050] Referring to Figure 4 , the control system of the integrated in-vehicle refrigerator includes a temperature detection module 1, a compressor control module 2, a low-pressure protection detection module 3, and a heat compensation control module 4.

[0051] The temperature detection module 1 is used to detect whether the vehicle-mounted refrigerator has reached the set temperature. Specifically, the temperature detection module 1 may include one or more temperature sensors, installed inside the vehicle-mounted refrigerator or at key positions, for real-time collection of temperature data inside the refrigerator cavity; in some embodiments, the temperature detection module 1 uses a digital temperature sensor, with high precision and fast response capabilities, and uploads the temperature data to the vehicle controller or the refrigerator control unit through a communication interface (such as the CAN bus or LIN bus); in some other embodiments, the temperature detection module 1 cooperates with the temperature threshold judgment logic, and when the detected temperature is higher than the set target value, a refrigeration request signal is generated; in a further embodiment, the temperature detection module 1 supports multi-point temperature measurement, and judges whether the overall refrigerator has reached the set temperature by combining the temperature average value or the key point temperature to improve the detection accuracy; in addition, the temperature detection module 1 can also be linked with the user setting function, allowing the user to set the target temperature through the central control screen or the mobile terminal, and the module automatically judges whether the refrigerator temperature meets the standard accordingly.

[0052] The compressor control module 2 is used to start the vehicle compressor when the set temperature is not reached.

[0053] Specifically, the compressor control module 2 is used to control the start of the vehicle compressor when the temperature detection module 1 determines that the vehicle-mounted refrigerator has not reached the set temperature. In specific implementation, the compressor control module 2 can be integrated into the vehicle thermal management control unit or the refrigerator controller, and triggers the start command of the compressor by receiving the refrigeration request signal from the temperature detection module; in some embodiments, the compressor control module 2 performs a vehicle system status check before starting the compressor, such as battery power, motor operating status, and ambient temperature, etc., to ensure that the compressor start conditions are met; in some other embodiments, the compressor control module 2 communicates with the vehicle controller through the CAN bus, calls the vehicle compressor start logic, and realizes the compression refrigeration function; in a further implementation, the compressor control module 2 can also adjust the operating frequency or speed of the compressor according to the operating mode (such as energy-saving mode, fast refrigeration mode) to optimize the energy consumption and refrigeration efficiency; in addition, the compressor control module 2 can also be linked with the low-voltage protection detection module 3 to monitor the operating status of the compressor in real time to ensure the safe and stable operation of the system.

[0054] The low-voltage protection detection module 3 is used to detect whether the compressor triggers low-voltage protection.

[0055] Specifically, the low-pressure protection detection module 3 is used to monitor the low-pressure side state of the compressor in real time to determine whether the low-pressure protection is triggered. In the specific implementation, the low-pressure protection detection module 3 is usually integrated with a low-pressure sensor or connected to a pressure sensor at the low-pressure end of the compressor, and determines whether the compressor is in a low-pressure protection state by collecting refrigerant pressure data and comparing it with the set low-pressure threshold; in some embodiments, the low-pressure protection detection module 3 will also monitor the operating current, suction temperature, refrigerant flow and other parameters of the compressor, and make a comprehensive judgment in combination with multi-dimensional data to improve the accuracy of low-pressure state identification; in some other embodiments, the low-pressure protection detection module 3 communicates with the compressor controller and receives the fault code or protection state signal fed back by it to determine whether the low-pressure protection is triggered; in a further embodiment, the low-pressure protection detection module 3 can also support dynamic updating of the low-pressure threshold, and make adaptive adjustments according to the ambient temperature or system operation history to enhance the detection sensitivity and robustness under different climatic conditions; in addition, the low-pressure protection detection module 3 can be linked with the supplementary heat control module 2, and immediately trigger the corresponding supplementary heat control process after detecting the low-pressure protection, so as to improve the system response speed and reliability.

[0056] The heat supplement control module 4 is used to start the cooler to supplement heat for the low-pressure circuit when the low-pressure protection is triggered.

[0057] Specifically, the heat supplement control module 4 is used to control the cooler to supplement heat to the low-pressure circuit when the compressor triggers the low-pressure protection, so as to increase the suction pressure of the compressor and release the low-pressure protection state. In a specific implementation, the supplementary heat control module 4 switches the heat source path by controlling the multi-way water valve, and starts the cooler circulating water pump to transfer the heat from the heat source to the low-pressure refrigerant circuit; in some embodiments, the supplementary heat control module 4 can judge the heating demand level based on the current pressure value of the low-pressure circuit, the temperature difference data and the historical supplementary heat effect, and select or superimpose the heat source in the first level (battery heating), the second level (motor heating) and the third level (water heater heating) in sequence; in some other embodiments, the supplementary heat control module 4 finely controls the supplementary heat intensity by adjusting the power output of the water heater or the speed of the water pump to achieve dynamic heat regulation; in a further embodiment, the supplementary heat control module 4 also has a closed-loop control function, continuously monitors the compressor pressure state during the supplementary heat process, and judges whether the supplementary heat is effective. If not, the heating level is automatically increased or the heat source path is replaced; in addition, the supplementary heat control module 4 works in coordination with the vehicle thermal management system and the compressor control module 2 to ensure that the supplementary heat strategy can respond quickly and be stably executed under different ambient temperatures and system conditions, thereby ensuring the continuous and reliable operation of the vehicle refrigerator.

[0058] Among them, the supplementary heat control module 4 is also used to: determine the heating demand level of the low-pressure circuit; select the corresponding heating method according to the heating demand level, wherein the heating demand level includes the first level, the second level and the third level, the first level uses a battery heating method, the second level uses a motor heating method, and the third level uses a water heater heating method; if the heating amount of the current heating method is insufficient, switch to a higher level of heating method.

[0059] Specifically, in a further embodiment, the heat replenishment control module 4 has the ability to evaluate heating demand and manage multiple heat sources, and can determine the current required heating demand level based on the current pressure value of the low-pressure circuit, the temperature difference between the inlet and outlet of the cooler, the ambient temperature, the heat replenishment response time and other parameters. When the system determines that it is the first level, the heat replenishment control module 4 controls the multi-way water valve to introduce the battery waste heat into the cooler for primary heat replenishment; if the pressure does not return to the normal range, it will automatically rise to the second level, and introduce the motor waste heat by switching the heat source path to enhance the heat replenishment capacity; if it is still not enough to remove the low-pressure protection, the third level will be activated, and the water heater will be called to provide higher thermal power for active heating.

[0060] During the heating process, the heating control module 4 continuously monitors the heating effect and dynamically adjusts the heat source level to achieve on-demand heating and energy efficiency optimization.

[0061] In addition, in order to avoid system instability caused by frequent switching, the supplementary heat control module 4 can also set a heat source switching hysteresis threshold or transition strategy to ensure that the heat source upgrade process is smooth and reliable.

[0062] Through this multi-stage dynamic heat replenishment mechanism, the system can achieve efficient and accurate heat replenishment for the low-pressure circuit under various environments and working conditions, effectively improving the operating stability of the compressor and the winter applicability of the vehicle refrigerator.

[0063] The integrated vehicle refrigerator control system provided in the embodiment of the present invention realizes intelligent temperature control and stable operation of the vehicle refrigerator under winter conditions through the coordinated work of the temperature detection module 1, the compressor control module 2, the low voltage protection detection module 3 and the supplementary heat control module 4.

[0064] The temperature inside the refrigerator is monitored in real time by the temperature detection module 1. If the set temperature is not reached, the compressor control module 2 starts the vehicle compressor for refrigeration. During the operation of the compressor, the low-pressure protection detection module 3 monitors the low-pressure side status in real time. If it is detected that the low-pressure protection is triggered, the heat supplement control module 4 responds immediately, starts the cooler for heat supplement, and determines the heating demand level according to the low-pressure degree. Heat sources such as batteries, motors or water heaters are called in turn to increase the heat supplement capacity step by step until the low-pressure protection is released and normal refrigeration is restored.

[0065] This system has the capabilities of intelligent perception, adaptive adjustment, and multi-level heat source management. It can make full use of the existing vehicle thermal management resources, solve the problem that the traditional integrated in-vehicle refrigerator cannot work due to the low-pressure protection of the compressor in winter, thus significantly improving the availability and stability of the refrigerator in low-temperature environments, expanding the annual usage range of the integrated refrigerator, and enhancing the vehicle comfort and user experience.

[0066] An embodiment of the present invention also discloses a readable storage medium.

[0067] A readable storage medium stores a computer program, and when the computer program is executed by a processor, it implements the steps of the control method of the integrated in-vehicle refrigerator described in any one of the above embodiments. The computer-readable storage medium may include: any entity or device capable of carrying the computer program, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), and software distribution medium, etc. The computer program includes computer program code. The computer program code may be in the form of source code, object code, executable file, or some intermediate form, etc. The computer-readable storage medium may include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), and software distribution medium, etc.

[0068] Any process or method description shown in the flowchart or described in other ways herein can be understood to represent a module, segment, or part of code including one or more executable instructions for implementing a specific logical function or process. The scope of the preferred embodiments of the present invention includes additional implementations, where the functions may be executed in a substantially simultaneous manner or in the reverse order according to the involved functions, rather than in the order shown or discussed, which should be understood by those skilled in the technical field to which the embodiments of the present invention belong.

[0069] The logic and / or steps represented in the flowchart or described in other ways herein, for example, can be considered as a sequenced list of executable instructions for implementing a logical function, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processing module, or other systems that can fetch and execute instructions from the instruction execution system, apparatus, or device), or in combination with these instruction execution systems, apparatus, or devices.

[0070] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A control method for an integrated vehicle refrigerator, characterized in that: include: Check whether the car refrigerator reaches the set temperature; If the set temperature is not reached, start the vehicle compressor; Detect whether the compressor triggers low pressure protection; The low-pressure protection is triggered and the cooler is started to provide heat to the low-pressure circuit.

2. The control method according to claim 1, characterized in that: The triggering of the low-pressure protection and starting the cooler to supplement heat for the low-pressure circuit include: Start the cooler; Control the cooler to add heat to the low-pressure circuit; Check whether the compressor still triggers low pressure protection.

3. The control method according to claim 2, characterized in that: After detecting whether the compressor still triggers low-pressure protection, the method further includes: If the compressor still triggers low pressure protection, increase the heating power of the cooler.

4. The control method according to claim 3, characterized in that: If the compressor still triggers the low pressure protection, increasing the supplementary heating power of the cooler includes: Determine the heating demand level of the low-pressure circuit; Select the corresponding heating method according to the level of heating demand.

5. The control method according to claim 4, characterized in that: The heating demand levels include the first level, the second level and the third level, wherein: The first stage uses battery heating; The second stage uses motor heating; The third stage adopts water heater to provide heating.

6. The control method according to claim 5, characterized in that: Also includes: If the current heating method does not provide enough heat, switch to a higher level heating method.

7. The control method according to claim 1, characterized in that: The detecting whether the vehicle refrigerator reaches the set temperature includes: Get the current temperature of the car refrigerator; Compare the current temperature to the preset temperature.

8. The control method according to claim 1, characterized in that: The detecting whether the compressor triggers low pressure protection comprises: Detect the suction pressure of the compressor; Determine whether the inspiratory pressure is lower than the preset threshold.

9. A control system for an integrated vehicle refrigerator, characterized in that: The system comprises: Temperature detection module, used to detect whether the car refrigerator reaches the set temperature; The compressor control module is used to start the vehicle compressor when the set temperature is not reached; A low-pressure protection detection module is used to detect whether the compressor triggers low-pressure protection; The supplementary heat control module is used to start the cooler to supplement heat for the low-pressure circuit when the low-pressure protection is triggered.

10. The control system according to claim 9, characterized in that: The supplementary heat control module is also used for: Determine the heating demand level of the low-pressure circuit; Select a corresponding heating method according to the heating demand level, where the heating demand level includes the first level, the second level and the third level. The first level adopts a battery heating method, the second level adopts a motor heating method, and the third level adopts a water heater heating method; If the current heating method does not provide enough heat, switch to a higher level heating method.

11. A readable storage medium, characterized in that: The readable storage medium stores computer instructions, and when the computer instructions are executed by a processor, the control method according to any one of claims 1 to 8 is implemented.

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