Control method and system of vehicle-mounted refrigerator and vehicle

Abstract

The invention discloses a control method and system for a vehicle-mounted refrigerator and a vehicle. The control method comprises the steps that the remaining electric quantity of a power battery and a road surface unevenness coefficient in the vehicle running process are obtained; if the residual electric quantity of the power battery is smaller than the first preset electric quantity, the working frequency of a compressor of the vehicle-mounted refrigerator is controlled to be reduced from f to k1 * f, and a lighting module of the vehicle-mounted refrigerator is turned off; determining a jolting grade according to the road surface unevenness coefficient; if the jolting grade is slight jolting, controlling the rotating speed of a fan of the vehicle-mounted refrigerator to be n; if the jolting grade is moderate jolting, the rotating speed of a draught fan of the vehicle-mounted refrigerator is controlled to be k2 * n; and if the jolting grade is severe jolting, a compressor and a fan of the vehicle-mounted refrigerator are turned off. According to the invention, the energy consumption can be reduced, the stability of the vehicle-mounted refrigerator is improved, and the cruising ability of the power battery is prevented from being influenced.

Description

Technical Field

[0001] The present invention belongs to the field of vehicle-mounted refrigerators, and in particular relates to a control method, a system and a vehicle for a vehicle-mounted refrigerator. Background Art

[0002] With the continuous development of automobile technology, in-vehicle electrical equipment is becoming more and more abundant. Car refrigerators are widely used as a device that allows users to store food and drinks while driving. However, the existing car refrigerator control technology has the following defects: (1) It only operates according to the target temperature of the car refrigerator or user instructions, without considering the impact of vehicle acceleration on the vehicle's instantaneous energy consumption and the impact of bumpy conditions on the stability of the car refrigerator; (2) There is a lack of active protection mechanism for vehicle bumpy conditions. The vehicle vibration under bumpy conditions superimposed on the vibration of the fan and compressor may cause the items in the car refrigerator to be damaged by vibration; (3) When the vehicle is low on power or accelerating suddenly, the compressor of the car refrigerator still operates at rated power, affecting the endurance of the power battery and vehicle performance. Summary of the invention

[0003] The object of the present invention is to provide a control method, system and vehicle for a vehicle refrigerator, so as to reduce energy consumption, improve the stability of the vehicle refrigerator and avoid affecting the endurance of the power battery.

[0004] In a first aspect, the present invention provides a control method for a vehicle refrigerator, comprising: Obtain the remaining power of the power battery and the road roughness coefficient during vehicle operation.

[0005] If the remaining power (i.e., SOC) of the power battery is less than the first preset power, the operating frequency of the compressor of the vehicle refrigerator is controlled to decrease from f to k1*f, and the lighting module of the vehicle refrigerator is turned off. Wherein, k1 represents the preset frequency coefficient, 0≤k1<1, and f represents the rated frequency of the compressor of the vehicle refrigerator.

[0006] The bump level is determined according to the road roughness coefficient: if the bump level is mild, the fan speed of the car refrigerator is controlled to be n; if the bump level is moderate, the fan speed of the car refrigerator is controlled to be k2*n; if the bump level is severe, the compressor and fan of the car refrigerator are turned off (that is, the compressor speed and fan speed of the car refrigerator are both controlled to 0). Among them, k2 represents the preset speed coefficient, 0<k2<1, and n represents the rated speed of the fan of the car refrigerator.

[0007] Preferably, if the vehicle refrigerator has a semiconductor refrigeration standby module, when the bump level is severe, in addition to shutting down the compressor and fan of the vehicle refrigerator, the semiconductor refrigeration standby module will also be enabled. Although the semiconductor refrigeration standby module cannot cool below zero, it does not generate vibration when it is working. In case of severe bumps, the compressor and fan that will cause superimposed vibration are shut down, and the semiconductor refrigeration standby module is enabled to cool the vehicle refrigerator, which improves the stability of the vehicle refrigerator while also preventing the temperature inside the vehicle refrigerator from rising too quickly.

[0008] Preferably, the control method of the vehicle refrigerator further includes: Get the acceleration of the vehicle during operation.

[0009] If the acceleration is greater than or equal to the first preset acceleration, the compressor of the vehicle refrigerator is controlled to stop working. When the acceleration is less than or equal to the second preset acceleration, the compressor of the vehicle refrigerator is controlled to resume normal operation. Among them, the second preset acceleration is less than the first preset acceleration. When the acceleration during the operation of the vehicle is greater than or equal to the first preset acceleration, it means that the vehicle is in a rapid acceleration condition. At this time, controlling the compressor of the vehicle refrigerator to stop working can reduce the instantaneous energy consumption of the vehicle and ensure the power output of the vehicle, thereby avoiding affecting the performance of the vehicle. When the acceleration during the operation of the vehicle changes from greater than or equal to the first preset acceleration to less than or equal to the second preset acceleration, it means that the vehicle has exited the rapid acceleration condition. At this time, the compressor of the vehicle refrigerator is controlled to resume normal operation to cool the vehicle refrigerator. The second preset acceleration is less than the first preset acceleration, which avoids frequent start and stop of the compressor of the vehicle refrigerator.

[0010] Preferably, the first preset acceleration is 5 m / s², and the second preset acceleration is 4.5 m / s².

[0011] Preferably, the control method of the vehicle refrigerator further includes: Get the vehicle speed and the actual temperature inside the vehicle refrigerator.

[0012] If both condition 1 and condition 2 are met, the operating power of the compressor of the vehicle refrigerator is controlled to be k3*P, until condition 3 or condition 4 is met, then the operating power of the compressor of the vehicle refrigerator is controlled to be P. Among them, condition 1, the vehicle speed is less than or equal to 0 (indicating that the vehicle is stationary) and the duration is greater than or equal to the first preset time, condition 2, TT th (i.e. T minus T th The difference after (after) is greater than the first preset temperature, condition three, the timing time (start timing when the operating power of the compressor of the car refrigerator becomes k3*P) reaches the second preset time, condition four, T≤T th; k3 represents the preset power coefficient, 1<k3≤1.1, P represents the rated power of the compressor of the car refrigerator, T represents the actual temperature in the car refrigerator, T th Indicates the preset target temperature of the car refrigerator. After the vehicle has been stationary for a while, if the temperature in the car refrigerator is still relatively high (for example, the compressor is turned off or the fan speed is reduced during the operation of the vehicle), the car refrigerator is controlled to operate at over-rated power until any of the conditions 3 and 4 are met before returning to rated power operation. Without affecting the life of the compressor, the temperature in the car refrigerator can be quickly reduced to the target temperature of the car refrigerator, avoiding food spoilage due to excessive temperature in the car refrigerator.

[0013] Preferably, the first preset power is 20%, the preset frequency coefficient k1=0.5, the preset speed coefficient k2=0.7, the preset power coefficient k3=1.09, the first preset time is 5 minutes, the second preset time is 6 minutes, and the first preset temperature is 5°C.

[0014] Preferably, if the road surface roughness coefficient is less than or equal to the first preset roughness coefficient, the bump level is determined to be mild bump; if the road surface roughness coefficient is greater than the first preset roughness coefficient and less than or equal to the second preset roughness coefficient, the bump level is determined to be moderate bump; if the road surface roughness coefficient is greater than the second preset roughness coefficient, the bump level is determined to be severe bump. The first preset roughness coefficient is less than the second preset roughness coefficient.

[0015] Preferably, the first preset roughness coefficient is 0.1, and the second preset roughness coefficient is 0.3.

[0016] In a second aspect, the present invention provides a control system for a vehicle refrigerator, which includes a refrigerator controller, wherein the refrigerator controller is programmed to execute the control method for the vehicle refrigerator.

[0017] In a third aspect, the present invention provides a vehicle, which includes the control system of the vehicle refrigerator.

[0018] The present invention has the following effects: (1) When the remaining power of the power battery is less than the first preset power, the operating frequency of the compressor of the vehicle refrigerator is reduced, and the lighting module of the vehicle refrigerator is turned off, thereby reducing energy consumption and extending the endurance of the power battery. The invention is particularly suitable for new energy vehicles, RVs, etc.

[0019] (2) Reduce the fan speed of the car refrigerator in moderate bumps, and turn off the compressor and fan of the car refrigerator in severe bumps. This avoids the vibration generated by the compressor and fan of the car refrigerator being superimposed on the vibration of the vehicle, causing more damage to the items in the car refrigerator due to vibration. It improves the stability of the car refrigerator. In the case of severe bumps, the damage rate of items in the car refrigerator can be reduced by about 30%. It is particularly suitable for new energy vehicles, RVs, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a flow chart of a first control method of a vehicle refrigerator in an embodiment of the present invention.

[0021] Figure 2 This is a flow chart of a second control method for a vehicle refrigerator in an embodiment of the present invention.

[0022] Figure 3 This is a flow chart of a third control method for a vehicle refrigerator in an embodiment of the present invention. DETAILED DESCRIPTION

[0023] In order to enable a more detailed understanding of the features and technical contents of the embodiments of the present invention, the implementation of the embodiments of the present invention is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not intended to limit the embodiments of the present invention.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein are only for the purpose of describing the embodiments of the present invention and are not intended to limit the present invention.

[0025] In the following description, reference is made to “some embodiments”, which describe a subset of all possible embodiments, but it will be understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0026] like Figure 1 As shown, the first control method of the vehicle refrigerator in the embodiment of the present invention includes: S11, obtaining the remaining power of the power battery and the road roughness coefficient during the operation of the vehicle, and then executing S12.

[0027] During vehicle operation, the compressor of the on-board refrigerator usually runs at the rated frequency f and rated power P, and the fan of the on-board refrigerator usually runs at the rated speed n. f, P, and n are all known quantities. The remaining power of the power battery is transmitted to the CAN bus by the BMS. The road surface roughness coefficient can be calculated by installing an accelerometer in combination with a gyroscope near the vehicle suspension system to measure the vertical displacement of the vehicle suspension system; the vehicle vibration response method can also be used to measure the vehicle body vibration using a vehicle accelerometer, and the road surface excitation is inverted based on the vehicle dynamics model to obtain the road surface roughness coefficient. The calculation method of the road surface roughness coefficient belongs to the existing technology and will not be described in detail here.

[0028] S12: Determine whether the remaining power of the power battery is less than a first preset power. If yes, execute S13, otherwise execute S14. The first preset power is a calibration value. As an example, the first preset power is 20%.

[0029] S13, control the operating frequency of the compressor of the vehicle refrigerator to drop from f to k1*f, turn off the lighting module of the vehicle refrigerator, and then execute S15. Wherein, k1 represents a preset frequency coefficient, 0≤k1<1. As an example, k1=0.5.

[0030] S14, controlling the operating frequency of the compressor of the vehicle refrigerator to remain at f, and then executing S15.

[0031] S15. Determine the bumpiness level according to the road surface roughness coefficient, and then execute S16.

[0032] In some embodiments, if the road surface roughness coefficient is less than or equal to the first preset roughness coefficient, the bump level is determined to be mild bump. If the road surface roughness coefficient is greater than the first preset roughness coefficient and less than or equal to the second preset roughness coefficient, the bump level is determined to be moderate bump. If the road surface roughness coefficient is greater than the second preset roughness coefficient, the bump level is determined to be severe bump. The first preset roughness coefficient and the second preset roughness coefficient are both calibrated values. As an example, the first preset roughness coefficient is 0.1 and the second preset roughness coefficient is 0.3.

[0033] S16: Determine whether the bumpiness level is moderate bumpiness. If so, execute S17; otherwise, execute S18.

[0034] S17, control the fan speed of the vehicle refrigerator to be k2*n, and then return to execute S11. Wherein, k2 represents a preset speed coefficient, 0<k2<1. As an example, k2=0.7.

[0035] S18, determining whether the bump level is severe bump, if so, executing S19, otherwise (indicating that the bump level is mild bump), executing S112.

[0036] S19, determining whether the vehicle refrigerator has a semiconductor refrigeration backup module, if yes, executing S110, otherwise executing S111.

[0037] As an example, the determination of whether there is a semiconductor refrigeration standby module can be realized by setting the semiconductor refrigeration permission flag. Specifically, if the vehicle refrigerator has a semiconductor refrigeration standby module, the semiconductor refrigeration permission flag in the program is set to 1; if the vehicle refrigerator does not have a semiconductor refrigeration standby module, the semiconductor refrigeration permission flag in the program is set to 0. When the program is running, by determining whether the semiconductor refrigeration permission flag is 1, it can be determined whether the vehicle refrigerator has a semiconductor refrigeration standby module.

[0038] S110, turn off the compressor and fan of the vehicle refrigerator (ie, control the compressor speed and fan speed of the vehicle refrigerator to 0), enable the semiconductor refrigeration standby module, and then return to execute S11.

[0039] S111, turning off the compressor and the fan of the vehicle refrigerator (ie, controlling the compressor speed and the fan speed of the vehicle refrigerator to be 0), and then returning to execute S11.

[0040] S112, control the fan speed of the vehicle refrigerator to be n, and then return to execute S11.

[0041] like Figure 2 As shown, the second control method of the vehicle refrigerator in the embodiment of the present invention includes: S21, obtaining the acceleration of the vehicle during operation, the remaining power of the power battery and the road roughness coefficient, and then executing S22. The acceleration of the vehicle during operation is collected by the acceleration sensor installed on the vehicle chassis and uploaded to the CAN bus by the body controller.

[0042] S22: Determine whether the remaining power of the power battery is less than a first preset power; if so, execute S23; otherwise, execute S24.

[0043] S23, controlling the operating frequency of the compressor of the vehicle refrigerator to drop from f to k1*f, and turning off the lighting module of the vehicle refrigerator, and then executing S25.

[0044] S24, controlling the operating frequency of the compressor of the vehicle refrigerator to remain at f, and then executing S25.

[0045] S25. Determine the bumpiness level according to the road surface roughness coefficient, and then execute S26.

[0046] S26: Determine whether the bumpiness level is moderate bumpiness. If so, execute S27; otherwise, execute S28.

[0047] S27, control the fan speed of the vehicle refrigerator to k2*n, and then execute S213.

[0048] S28, determining whether the bump level is severe bump, if so, executing S19, otherwise (indicating that the bump level is mild bump), executing S212.

[0049] S29, determining whether the vehicle refrigerator has a semiconductor refrigeration backup module, if yes, executing S210, otherwise executing S211.

[0050] S210, turn off the compressor and fan of the vehicle refrigerator, enable the semiconductor refrigeration standby module, and then execute S213.

[0051] S211: Turn off the compressor and fan of the vehicle refrigerator, and then execute S213.

[0052] S212, control the fan speed of the vehicle refrigerator to n, and then execute S213.

[0053] S213, determine whether the acceleration is greater than or equal to the first preset acceleration, if yes, execute S214, otherwise return to execute S21. The first preset acceleration is a calibration value. As an example, the first preset acceleration is 5m / s².

[0054] S214: Control the compressor of the vehicle refrigerator to stop working, and then execute S215.

[0055] S215: Determine whether the acceleration is less than or equal to a second preset acceleration. If yes, execute S216, otherwise continue to execute S215. The second preset acceleration is a calibration value. As an example, the second preset acceleration is 4.5 m / s².

[0056] S216: Control the compressor of the vehicle refrigerator to resume normal operation, and then return to S21.

[0057] like Figure 3 As shown, the third control method of the vehicle refrigerator in the embodiment of the present invention includes: S31, obtaining the acceleration, vehicle speed, remaining power of the power battery, road roughness coefficient and actual temperature in the vehicle refrigerator during vehicle operation, and then executing S32. The vehicle speed is detected by the wheel speed sensor and uploaded to the CAN bus by the body controller, and the actual temperature in the vehicle refrigerator is detected by the temperature sensor installed in the vehicle refrigerator and uploaded to the CAN bus by the refrigerator controller.

[0058] S32: Determine whether the remaining power of the power battery is less than a first preset power; if so, execute S33; otherwise, execute S34.

[0059] S33, controlling the operating frequency of the compressor of the vehicle refrigerator to drop from f to k1*f, and turning off the lighting module of the vehicle refrigerator, and then executing S35.

[0060] S34, controlling the operating frequency of the compressor of the vehicle refrigerator to remain at f, and then executing S35.

[0061] S35. Determine the bumpiness level according to the road surface roughness coefficient, and then execute S36.

[0062] S36: Determine whether the bumpiness level is moderate bumpiness. If so, execute S37; otherwise, execute S38.

[0063] S37, control the fan speed of the vehicle refrigerator to k2*n, and then execute S313.

[0064] S38, determining whether the bump level is severe bump, if so, executing S39, otherwise (indicating that the bump level is mild bump), executing S312.

[0065] S39, determining whether the vehicle refrigerator has a semiconductor refrigeration backup module, if yes, executing S310, otherwise executing S311.

[0066] S310, turn off the compressor and fan of the vehicle refrigerator, enable the semiconductor refrigeration standby module, and then execute S313.

[0067] S311, turn off the compressor and fan of the vehicle refrigerator, and then execute S313.

[0068] S312, control the fan speed of the vehicle refrigerator to n, and then execute S313.

[0069] S313, determine whether the acceleration is greater than or equal to the first preset acceleration, if yes, execute S314, otherwise execute S317.

[0070] S314: Control the compressor of the vehicle refrigerator to stop working, and then execute S315.

[0071] S315: Determine whether the acceleration is less than or equal to the second preset acceleration; if so, execute S316; otherwise, continue to execute S315.

[0072] S316: Control the compressor of the vehicle refrigerator to resume normal operation, and then execute S317.

[0073] S317: Determine whether both condition 1 and condition 2 are satisfied. If yes, execute S318; otherwise, return to execute S31.

[0074] Among them, condition 1: the vehicle speed is less than or equal to 0 (indicating that the vehicle is stationary) and the duration is greater than or equal to the first preset time, condition 2: TTth (i.e. T minus T th The difference after (after) is greater than the first preset temperature; wherein T represents the actual temperature in the vehicle refrigerator, T th Indicates the preset target temperature of the vehicle refrigerator. The first preset time and the first preset temperature are both calibrated values. As an example, the first preset time is 5 minutes and the first preset temperature is 5°C.

[0075] S318, control the operating power of the compressor of the vehicle refrigerator to be k3*P, and then execute S319. Wherein, k3 represents a preset power coefficient, 1<k3≤1.1, and the preset power coefficient is a calibration value. As an example, the preset power coefficient k3=1.09.

[0076] S319: Determine whether condition 3 or condition 4 is satisfied. If yes, execute S320; otherwise, continue to execute S319. Condition 3: The timing time reaches the second preset time; Condition 4: T≤T th The second preset time is a calibration value. As an example, the second preset time is 6 minutes.

[0077] S320, control the operating power of the compressor of the vehicle refrigerator to be P, and then return to execute S31.

[0078] In addition, an embodiment of the present invention further provides a control system for a vehicle refrigerator, which includes a refrigerator controller, and the refrigerator controller is programmed to execute the control method of the vehicle refrigerator.

[0079] In addition, an embodiment of the present invention further provides a vehicle, which includes the control system of the vehicle refrigerator.

[0080] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A control method for a vehicle refrigerator, characterized in that: include: Obtain the remaining power of the power battery and the road roughness coefficient during vehicle operation; If the remaining power of the power battery is less than the first preset power, the operating frequency of the compressor of the vehicle refrigerator is controlled to decrease from f to k1*f, and the lighting module of the vehicle refrigerator is turned off; wherein k1 represents a preset frequency coefficient, 0≤k1<1, and f represents the rated frequency of the compressor of the vehicle refrigerator; The bumpiness level is determined according to the road roughness coefficient: if the bumpiness level is mild, the fan speed of the car refrigerator is controlled to be n; if the bumpiness level is moderate, the fan speed of the car refrigerator is controlled to be k2*n; if the bumpiness level is severe, the compressor and fan of the car refrigerator are turned off; wherein k2 represents a preset speed coefficient, 0<k2<1, and n represents the rated speed of the fan of the car refrigerator.

2. The control method of the vehicle refrigerator according to claim 1, characterized in that: If the vehicle refrigerator has a semiconductor refrigeration standby module, the semiconductor refrigeration standby module is activated when the bump level is severe bump.

3. The control method of the vehicle refrigerator according to claim 2, characterized in that: Also includes: Obtain the acceleration of the vehicle during operation; If the acceleration is greater than or equal to a first preset acceleration, the compressor of the vehicle refrigerator is controlled to stop working. When the acceleration is less than or equal to a second preset acceleration, the compressor of the vehicle refrigerator is controlled to resume normal operation. The second preset acceleration is less than the first preset acceleration.

4. The control method of the vehicle refrigerator according to claim 3, characterized in that: The first preset acceleration is 5m / s², and the second preset acceleration is 4.5m / s².

5. The control method of the vehicle refrigerator according to any one of claims 1 to 4, characterized in that: Also includes: Get the vehicle speed and the actual temperature inside the vehicle refrigerator; If both conditions 1 and 2 are met, the operating power of the compressor of the vehicle refrigerator is controlled to be k3*P, until condition 3 or condition 4 is met, the operating power of the compressor of the vehicle refrigerator is controlled to be P; wherein, condition 1, the vehicle speed is less than or equal to 0 and the duration is greater than or equal to the first preset time, condition 2, TT th Greater than the first preset temperature, condition three, the timing time reaches the second preset time, condition four, T≤T th ; k3 represents the preset power coefficient, 1<k3≤1.1, P represents the rated power of the compressor of the car refrigerator, T represents the actual temperature in the car refrigerator, T th Indicates the preset vehicle refrigerator target temperature.

6. The control method of the vehicle refrigerator according to claim 5, characterized in that: The first preset power is 20%, the preset frequency coefficient k1=0.5, the preset speed coefficient k2=0.7, the preset power coefficient k3=1.09, the first preset time is 5 minutes, the second preset time is 6 minutes, and the first preset temperature is 5°C.

7. The control method of the vehicle refrigerator according to claim 5, characterized in that: If the road surface roughness coefficient is less than or equal to the first preset roughness coefficient, the bumpiness level is determined to be mild bumpiness; If the road surface roughness coefficient is greater than the first preset roughness coefficient and less than or equal to the second preset roughness coefficient, the bumpiness level is determined to be moderate bumpiness; If the road surface roughness coefficient is greater than the second preset roughness coefficient, the bumpiness level is determined to be severe bumpiness; The first preset roughness coefficient is smaller than the second preset roughness coefficient.

8. The control method of the vehicle refrigerator according to claim 7, characterized in that: The first preset unevenness coefficient is 0.1, and the second preset unevenness coefficient is 0.

3.

9. A control system for a vehicle refrigerator, comprising a refrigerator controller, characterized in that: The refrigerator controller is programmed to execute the control method of the vehicle refrigerator according to any one of claims 1 to 8.

10. A vehicle, characterized in that: A control system comprising the vehicle refrigerator as claimed in claim 9.

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