Control method of vehicle refrigerator

Abstract

The present invention specifically relates to a control method for a vehicle refrigerator, comprising the following steps: obtaining status information of a vehicle equipped with the vehicle refrigerator, and when it is determined that the vehicle is in a driving state, obtaining the vehicle's driving speed S; upon obtaining the vehicle's driving speed S, determining whether the vehicle's driving speed S is less than a first preset value S1, and determining a change trend of the vehicle's driving speed S; and when the vehicle's driving speed S is less than the first preset value S1, or when the vehicle is in a deceleration state and lasts for a first preset time period H1, disconnecting the power circuit of the vehicle refrigerator's heat exchange device. The control method for a vehicle refrigerator provided by the present invention can prevent unstable engine starting strokes during vehicle startup due to the operation of the vehicle refrigerator, engine failure due to power loss, or inability to enter the automatic start-stop function due to voltage fluctuations in the vehicle power supply. The control process is simple and easy to implement, and has the advantages of simplicity, efficiency, and ease of implementation.

Description

Technical Field

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

[0002] Currently, when a vehicle equipped with a car refrigerator is started, the battery voltage may be instantly lowered due to the operation of the car refrigerator, resulting in an unstable engine starting journey, or the engine may fail to start due to power loss.

[0003] When a vehicle with automatic start-stop functionality enters engine stop mode after stopping, the vehicle's refrigerator continues to operate, causing the engine to immediately exit stop mode due to a voltage drop. Frequent switching between start-stop and start-stop modes can lead to poor fuel performance and battery degradation, placing a financial burden on users and increasing environmental pollution.

[0004] When the vehicle is stopped, if the car refrigerator enters or maintains a high-power operating mode such as rapid cooling, it will increase the noise inside the car and affect the driving experience. Therefore, it is necessary to study a control method for car refrigerators to solve the above problems. Summary of the Invention

[0005] The present invention aims to provide a simple, efficient and easy-to-implement control method for a vehicle refrigerator.

[0006] To achieve the above objectives, one embodiment of the present invention provides a control method for a vehicle refrigerator, comprising the following steps: obtaining status information of a vehicle equipped with the vehicle refrigerator, and when it is determined that the vehicle is in a driving state, obtaining the vehicle's driving speed S; after obtaining the vehicle's driving speed S, determining whether the vehicle's driving speed S is less than a first preset value S1, and determining a change trend of the vehicle's driving speed S; when the vehicle's driving speed S is less than the first preset value S1, or when the vehicle is in a deceleration state and lasts for a first preset time period H1, disconnecting the power circuit of the vehicle's heat exchange device.

[0007] As a further improvement of one embodiment of the present invention, when it is obtained that the vehicle is in a driving state, the value of the acceleration a of the vehicle is obtained. After obtaining the value of the acceleration a, the value of the acceleration a is integrated with time to obtain the driving speed S of the vehicle.

[0008] As a further improvement of one embodiment of the present invention, a method for controlling the on-off of a power circuit of a heat exchange device of a vehicle refrigerator includes controlling whether an onboard power supply of the vehicle refrigerator is connected to the power circuit of the heat exchange device.

[0009] As a further improvement of one embodiment of the present invention, after obtaining the vehicle's driving speed S, it is determined whether the vehicle's driving speed S is greater than a second preset value S2, and the changing trend of the vehicle's driving speed S is determined. When S>S2 and when the vehicle is in an accelerating or constant speed state and lasts for a second preset time period H2, the vehicle-mounted power supply is controlled to connect to the power circuit of the heat exchange device.

[0010] As a further improvement of one embodiment of the present invention, after obtaining the vehicle's driving speed S, it is determined whether the vehicle's driving speed S is greater than a second preset value S2, and the changing trend of the vehicle's driving speed S is determined. When S≤S2, or when the vehicle is in a deceleration state, or when the vehicle is in an acceleration or constant speed state but the duration is ≤the second preset time period H2, the power circuit between the vehicle-mounted power supply and the heat exchange device is controlled to be disconnected.

[0011] As a further improvement of one embodiment of the present invention, a method for controlling the power on and off of a heat exchange device of a vehicle refrigerator includes controlling a refrigerator power supply of the vehicle refrigerator to be connected to a vehicle power supply, wherein the refrigerator power supply is connected to the heat exchange device.

[0012] As a further improvement of an embodiment of the present invention, after obtaining the vehicle's driving speed S, it is determined whether the vehicle's driving speed S is greater than a second preset value S2, the changing trend of the vehicle's driving speed S is determined, whether the voltage value V1 of the vehicle power supply is greater than the voltage value V2 of the refrigerator power supply, and whether the voltage value V1 of the vehicle power supply is greater than the minimum threshold value V of the refrigerator power supply. L , when S>S2 and the vehicle is in an accelerating or constant speed state and lasts for a second preset time period H2 and V1>V2 and V1>V L , turn on the power circuit of the refrigerator power supply.

[0013] As a further improvement of an embodiment of the present invention, after obtaining the vehicle's driving speed S, it is determined whether the vehicle's driving speed S is greater than a second preset value S2, the changing trend of the vehicle's driving speed S is determined, whether the voltage value V1 of the vehicle power supply is greater than the voltage value V2 of the refrigerator power supply, and whether the voltage value V1 of the vehicle power supply is greater than the minimum threshold value V of the refrigerator power supply. L , when S≤S2, or when V1≤V2, or when V1≤V L , or when the vehicle is in a deceleration state, or when the vehicle is in an acceleration or constant speed state but the duration is ≤ the second preset time period H2, the power circuit of the refrigerator power supply is disconnected.

[0014] As a further improvement of one embodiment of the present invention, when the value of acceleration a is obtained, the value of acceleration a is filtered, and when the value of filtered acceleration a is obtained, the value of filtered acceleration a is integrated with time to obtain the vehicle's driving speed.

[0015] As a further improvement of one embodiment of the present invention, it is obtained whether the heat exchange device is in the power-on state. When it is obtained that the heat exchange device is in the power-on state, the compartment temperature of the vehicle refrigerator and the internal temperature of the vehicle are obtained. After obtaining the compartment temperature of the vehicle refrigerator and the internal temperature of the vehicle, the working gear of the heat exchange device is controlled.

[0016] Compared with the prior art, the present invention offers the following advantages: the control method for a vehicle refrigerator can obtain status information about the vehicle equipped with the refrigerator and, based on the vehicle's driving speed S and its changing trend, control the power circuit of the refrigerator's heat exchanger. This prevents unstable engine starting due to the refrigerator's operation during vehicle startup, engine failure due to battery loss, or inability to activate the automatic start-stop function due to voltage fluctuations in the vehicle's power supply. The method can also improve vehicle fuel efficiency and prevent battery degradation. The control process is simple and easy to implement, resulting in a simple, efficient, and easy-to-implement method. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a flow chart of a method for controlling a vehicle refrigerator when the vehicle refrigerator has no built-in refrigerator power supply according to the present invention;

[0018] Figure 2 Schematic diagram of the structure of the control system of the control method of the vehicle refrigerator of the present invention;

[0019] Figure 3 The present invention is a flow chart of a method for controlling a vehicle refrigerator when the vehicle refrigerator has a built-in refrigerator power supply.

[0020] In the figure: 1. control unit; 2. heat exchange device; 3. acceleration sensor; 4. power controller; 41. refrigerator power supply; 42. vehicle power supply; 5. voltage sensor; 61. compartment temperature sensor; 62. indoor temperature sensor. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0022] The terms "including" and "having" and any variations thereof in the present invention are intended to cover non-exclusive inclusions. Reference to "embodiments" herein means that the specific features, structures, or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0023] Combine Figure 1 As shown, in this embodiment, the present invention mainly relates to: a control method for a vehicle-mounted refrigerator, comprising the following working steps: obtaining status information of a vehicle equipped with the vehicle-mounted refrigerator, and when it is obtained that the vehicle is in a driving state, obtaining the driving speed S of the vehicle; after obtaining the driving speed S of the vehicle, determining whether the driving speed S of the vehicle is less than a first preset value S1, and determining the changing trend of the driving speed S of the vehicle.

[0024] According to the inventor's research and development experience, the first preset value S1 is set to 10 km / h. At this time, the vehicle's driving speed is relatively slow, indicating that the vehicle is in the initial stage of starting or in the deceleration stage. To avoid unstable engine starting stroke caused by the operation of the car refrigerator,

[0025] Furthermore, when the vehicle is decelerating for a first preset time period H1 (set to 3 seconds based on the inventors' research and development experience), this indicates that the vehicle is decelerating or even stopped. Disabling heat exchanger 2 after the vehicle decelerates or stops prevents the vehicle from not entering or automatically exiting the automatic start-stop function due to power consumption by the vehicle refrigerator, thereby optimizing vehicle fuel efficiency and extending the life of the vehicle power supply 42. If the vehicle refrigerator enters or remains in a high-power operating mode, such as rapid cooling, while the vehicle is stopped, it can increase interior noise, impacting the driving experience.

[0026] Therefore, when the vehicle's speed S is less than a first preset value S1, or when the vehicle is decelerating for a first preset time period H1, the power circuit of the vehicle refrigerator's heat exchange device 2 is disconnected. Here, heat exchange device 2 refers to the vehicle refrigerator's fixed-frequency compressor, variable-frequency compressor, or solid-state refrigeration device. This prevents unstable engine starting due to the vehicle's refrigerator operation during startup, prevents the engine from starting due to battery failure, or prevents the automatic start-stop function from being activated due to voltage fluctuations in the vehicle's power supply. This improves the vehicle's fuel efficiency and prevents battery degradation.

[0027] To more intuitively obtain the vehicle's speed S and its changing trend, the acceleration a is obtained when the vehicle is detected as in motion. Acceleration a is defined as the ratio of the change in velocity to the time it takes for that change to occur (Δv / Δt). This is a physical quantity that describes the speed of an object's change, and thus provides the trend of speed S. When acceleration a is less than 0, it indicates the vehicle is decelerating. After obtaining the acceleration a, it is integrated over time to obtain the vehicle's speed S.

[0028] Combine Figure 2 As shown, the vehicle includes an acceleration sensor 3 for monitoring the value of the acceleration a of the vehicle, and the control unit 1 of the vehicle refrigerator can read the measurement value of the acceleration sensor 3.

[0029] In order to better process the value of acceleration a, when the value of acceleration a is obtained, the value of acceleration a is filtered. When the value of the filtered acceleration a is obtained, the value of the filtered acceleration a is integrated with time to obtain the vehicle's driving speed S. This setting can improve the processing speed of the control unit 1.

[0030] When the vehicle-mounted refrigerator does not have a built-in refrigerator power supply, the relevant power-on control of the heat exchange setting 2 is performed according to the vehicle-mounted power supply 42 of the vehicle; the method for controlling the on-off of the power-on circuit of the heat exchange device 2 of the vehicle-mounted refrigerator includes controlling whether the vehicle-mounted power supply 42 of the vehicle is connected to the power-on circuit of the heat exchange device 2.

[0031] Furthermore, after obtaining the vehicle's driving speed S, it is determined whether the vehicle's driving speed S is greater than a second preset value S2, and the changing trend of the vehicle's driving speed S is determined. When S>S2 and when the vehicle is in an accelerating or constant speed state and lasts for a second preset time period H2, the on-board power supply 42 is controlled to connect to the power circuit of the heat exchange device.

[0032] Based on the inventor's research and development experience, the second preset value S2 is set to 20 km / h, and the second preset time period H2 is set to 3 seconds, indicating that the vehicle is in a stable driving state. The vehicle's driving speed is proportional to the engine speed, and the engine's starting stroke is relatively stable, allowing the heat exchange device 2 to be charged. Therefore, the vehicle's onboard power supply 42 is controlled to connect to the power circuit of the heat exchange device 2.

[0033] Furthermore, after obtaining the vehicle's speed S, a determination is made as to whether the vehicle's speed S is greater than a second preset value S2, and the changing trend of the vehicle's speed S is determined. If S ≤ S2, or if the vehicle is decelerating, or if the vehicle is accelerating or moving at a constant speed but the duration is ≤ a second preset time period H2, the vehicle is in an unstable driving phase. To prevent voltage fluctuations in the vehicle power supply caused by the operation of the vehicle refrigerator, the heat exchange device 2 cannot be charged, and therefore the vehicle power supply 42 is disconnected from the power supply circuit of the heat exchange device 2.

[0034] Combine Figure 3 As shown, when the refrigerator has a built-in refrigerator power supply 41, the vehicle's power supply system charges the built-in refrigerator power supply 41. The method for controlling the power on and off of the heat exchange device 2 of the vehicle refrigerator includes controlling the connection between the refrigerator power supply 41 of the vehicle refrigerator and the vehicle power supply 42, wherein the refrigerator power supply 41 is connected to the heat exchange device 2.

[0035] The vehicle includes a power controller 4 for controlling a refrigerator power supply 41 and a vehicle power supply 42 . The control unit 1 of the vehicle refrigerator is connected to the power controller 4 and performs logic control on the power controller 4 .

[0036] Further, after obtaining the vehicle's driving speed S, it is determined whether the vehicle's driving speed S is greater than a second preset value S2, the changing trend of the vehicle's driving speed S is determined, and whether the voltage value V1 of the vehicle power supply is greater than the voltage value V2 of the refrigerator power supply 41 is determined. It is also determined whether the voltage value V1 of the vehicle power supply is greater than the minimum threshold value V of the refrigerator power supply 41. L .

[0037] The vehicle includes a voltage sensor 5 for collecting voltage data of the vehicle power supply 42 and the refrigerator power supply 41 respectively. The control unit 1 of the vehicle refrigerator can read the measurement value of the voltage sensor 5 and perform logic control.

[0038] When S>S2 and the vehicle is in an accelerating or constant speed state and lasts for a second preset time period H2 and V1>V2 and V1>V L As mentioned above, the second preset value S2 is set to 20km / h, and the second preset time period H2 is set to 3s. Only when the voltage value V1 of the vehicle power supply is greater than the voltage value V2 of the refrigerator power supply 41, can the vehicle stably charge the refrigerator power supply 41. L The setting is performed according to the vehicle battery type and is set to the minimum value for normal operation of the vehicle battery. Only when the above conditions are met at the same time, the heat exchange device 2 can be charged and the power circuit of the refrigerator power supply 41 can be connected.

[0039] Further, after obtaining the vehicle's driving speed S, it is determined whether the vehicle's driving speed S is greater than a second preset value S2, the changing trend of the vehicle's driving speed S is determined, and whether the voltage value V1 of the vehicle power supply is greater than the voltage value V2 of the refrigerator power supply 41 is determined. It is also determined whether the voltage value V1 of the vehicle power supply is greater than the minimum threshold value V of the refrigerator power supply 41. L , when S≤S2, or when V1≤V2, or when V1≤V L , or when the vehicle is in a deceleration state, or when the vehicle is in an acceleration or constant speed state but the duration is ≤ the second preset time period H2, through the previous description and summary, it can be concluded that when in any of the above conditions, it is necessary to disconnect the power circuit of the refrigerator power supply 41 to ensure that the vehicle is in a relatively good state, because at this time the operation of the vehicle refrigerator may cause the voltage of the vehicle power supply to fluctuate, and the heat exchange device 2 cannot be charged.

[0040] Furthermore, it is obtained whether the heat exchange device 2 is in the power-on state. When it is obtained that the heat exchange device 2 is in the power-on state, that is, at this time, the vehicle is in a stable working state, the compartment temperature of the vehicle refrigerator and the internal temperature of the vehicle are obtained. After obtaining the compartment temperature of the vehicle refrigerator and the internal temperature of the vehicle, the working gear of the heat exchange device 2 is controlled in combination with the set temperature of the refrigerator.

[0041] The vehicle refrigerator includes a compartment temperature sensor 61 for monitoring the compartment temperature of the vehicle refrigerator and an indoor temperature sensor 62 for monitoring the internal temperature of the vehicle. The vehicle refrigerator control unit 1 can read the values ​​of the compartment temperature sensor 61 and the indoor temperature sensor 62. As for how to control the working gear of the heat exchange device 2, it is not the main technical problem to be solved by this patent and will not be described in detail here.

[0042] The above values ​​can be reconfigured through software and can be set specifically according to the performance of different vehicles. Of course, the values ​​​​experienced by developers are also for reference.

[0043] Compared to existing technologies, the vehicle refrigerator control method provided by the present invention can obtain status information of the vehicle equipped with the vehicle refrigerator and control the power supply circuit of the vehicle refrigerator's heat exchange device 2 based on the vehicle's driving speed S and its changing trend. This can prevent unstable engine starting stroke caused by the operation of the vehicle refrigerator during vehicle startup, engine failure due to battery loss, or inability to enter the automatic start-stop function due to voltage fluctuations in the vehicle power supply. This method can improve vehicle fuel efficiency and prevent battery degradation. The control process is simple and easy to implement, offering the advantages of simplicity, efficiency, and ease of implementation.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A control method for a vehicle refrigerator, characterized in that: The following steps are included: Acquire status information of a vehicle equipped with a vehicle refrigerator, and when it is determined that the vehicle is in a driving state, acquire a driving speed S of the vehicle; After obtaining the vehicle's driving speed S, determining whether the vehicle's driving speed S is less than a first preset value S1, and determining a change trend of the vehicle's driving speed S; Furthermore, when the vehicle refrigerator has a refrigerator power supply, determining whether a voltage value V1 of the vehicle power supply is greater than a voltage value V2 of the refrigerator power supply, and determining whether the voltage value V1 of the vehicle power supply is greater than a minimum threshold value VL of the refrigerator power supply; When the vehicle's speed S is less than a first preset value S1, or when the vehicle is in a deceleration state and lasts for a first preset time period H1, or when V1≤V2, or when V1≤VL, the power circuit of the heat exchange device of the vehicle refrigerator is disconnected.

2. The control method of the vehicle refrigerator according to claim 1, characterized in that: When it is obtained that the vehicle is in a driving state, the value of the acceleration a of the vehicle is obtained. After the value of the acceleration a is obtained, the value of the acceleration a is integrated with time to obtain the driving speed S of the vehicle.

3. The control method of the vehicle refrigerator according to claim 1, characterized in that: The method for controlling the on-off of a power circuit of a heat exchange device of a vehicle-mounted refrigerator includes controlling whether a vehicle power supply of the vehicle-mounted refrigerator is connected to the power circuit of the heat exchange device.

4. The control method of the vehicle refrigerator according to claim 3, characterized in that: After obtaining the vehicle's driving speed S, it is determined whether the vehicle's driving speed S is greater than a second preset value S2, and the changing trend of the vehicle's driving speed S is determined. When S> S2 and when the vehicle is in an accelerating or constant speed state and continues for a second preset time period H2, the vehicle's onboard power supply is controlled to connect to the power circuit of the heat exchange device.

5. The control method of the vehicle refrigerator according to claim 3, characterized in that: After obtaining the vehicle's driving speed S, it is determined whether the vehicle's driving speed S is greater than a second preset value S2, and the changing trend of the vehicle's driving speed S is determined. When S ≤ S2, or when the vehicle is in a deceleration state, or when the vehicle is in an acceleration or constant speed state but the duration is ≤ a second preset time period H2, the power circuit between the vehicle's power supply and the heat exchange device is controlled to be disconnected.

6. The control method of the vehicle refrigerator according to claim 1, characterized in that: The method for controlling the power on and off of a heat exchange device of a vehicle refrigerator includes controlling a refrigerator power supply of the vehicle refrigerator to be connected to a vehicle power supply, wherein the refrigerator power supply is connected to the heat exchange device.

7. The control method of the vehicle refrigerator according to claim 6, characterized in that: After obtaining the vehicle's driving speed S, determine whether the vehicle's driving speed S is greater than a second preset value S2, determine the changing trend of the vehicle's driving speed S, determine whether the voltage value V1 of the vehicle's power supply is greater than the voltage value V2 of the refrigerator's power supply, and determine whether the voltage value V1 of the vehicle's power supply is greater than the minimum threshold value V of the refrigerator's power supply. L , when S> S2 and when the vehicle is in an accelerating or constant speed state and lasts for a second preset time period H2 and V1> V2 and V1> V L , turn on the power circuit of the refrigerator power supply.

8. The control method of the vehicle refrigerator according to claim 6, characterized in that: After obtaining the vehicle's driving speed S, determine whether the vehicle's driving speed S is greater than a second preset value S2, determine the changing trend of the vehicle's driving speed S, determine whether the voltage value V1 of the vehicle's power supply is greater than the voltage value V2 of the refrigerator's power supply, and determine whether the voltage value V1 of the vehicle's power supply is greater than the minimum threshold value V of the refrigerator's power supply. L , when S≤ S2, or when V1≤ V2, or when V1≤ V L , or when the vehicle is in a deceleration state, or when the vehicle is in an acceleration or constant speed state but the duration is ≤ the second preset time period H2, the power circuit of the refrigerator power supply is disconnected.

9. The control method of the vehicle refrigerator according to claim 2, characterized in that: When the value of the acceleration a is obtained, the value of the acceleration a is filtered, and when the value of the filtered acceleration a is obtained, the value of the filtered acceleration a is integrated with time to obtain the driving speed of the vehicle.

10. The control method of the vehicle refrigerator according to claim 1, characterized in that: Obtain whether the heat exchange device is in a powered-on state. When it is obtained that the heat exchange device is in a powered-on state, obtain the compartment temperature of the vehicle refrigerator and the internal temperature of the vehicle. After obtaining the compartment temperature of the vehicle refrigerator and the internal temperature of the vehicle, control the working gear of the heat exchange device.

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