阅读说明：本技术 冷链物流车功能自检系统、自检方法及冷链物流车 (Cold-chain logistics vehicle function self-checking system and method and cold-chain logistics vehicle ) 是由 辜雄 于 2021-08-18 设计创作，主要内容包括：本发明涉及了一种冷链物流车功能自检系统、自检方法及冷链物流车,包括自检单元、控制单元、分析单元以及警报单元,所述自检单元用于检测车辆更换部件后更换部件以及相关部件的功能以及性能；所述控制单元用于控制自检单元,使自检单元能正常运行；所述分析单元用于将所述自检单元检测的功能以及性能分别跟预设功能以及预设性能比对分析,得到自检结果；所述警报单元用于根据自检结果发出警报信息。通过自检系统自检保证更换部件确实解决了故障问题,发挥了该有的功能以及性能,从而保证冷链物流车长时间运输需求。(The invention relates to a cold-chain logistics vehicle function self-checking system, a self-checking method and a cold-chain logistics vehicle, wherein the cold-chain logistics vehicle comprises a self-checking unit, a control unit, an analysis unit and an alarm unit, wherein the self-checking unit is used for detecting the functions and the performances of a replaced part and related parts after the part of the vehicle is replaced; the control unit is used for controlling the self-checking unit to enable the self-checking unit to normally operate; the analysis unit is used for comparing and analyzing the functions and performances detected by the self-checking unit with preset functions and preset performances respectively to obtain self-checking results; and the alarm unit is used for sending out alarm information according to the self-checking result. The self-checking system can guarantee that the fault problem is really solved by replacing the parts through self-checking, and the certain functions and performances are exerted, so that the long-time transportation requirement of the cold-chain logistics vehicle is met.)

1. The utility model provides a cold chain logistics car function self-checking system which characterized in that: the automatic detection device comprises a self-detection unit, a control unit, an analysis unit and an alarm unit, wherein the self-detection unit is used for detecting the functions and performances of a replaced part and related parts after the vehicle replaces the part;

the control unit is used for controlling the self-checking unit to enable the self-checking unit to normally operate;

the analysis unit is used for comparing and analyzing the functions and performances detected by the self-checking unit with preset functions and preset performances respectively to obtain self-checking results;

and the alarm unit is used for sending out alarm information according to the self-checking result.

2. A cold-chain logistics vehicle function self-checking method is characterized by comprising the following steps: the self-checking method for the functions of the cold-chain logistics vehicle is realized by the self-checking system for the functions of the cold-chain logistics vehicle as claimed in claim 1.

3. The cold-chain logistics vehicle function self-checking method of claim 2, characterized by comprising the following steps:

detecting whether the functions and performances of the replaced parts and related parts reach the standard or not after the parts are replaced by the vehicle;

judging whether the functions of the replacement part and the related part meet the preset function or not;

judging whether the performances of the replacement part and the related part meet the preset performance;

and when the function or performance of the replacement part or the related part is judged not to meet the standard, an alarm is given.

4. The cold-chain logistics vehicle function self-checking method of claim 3, characterized in that: and inputting the preset function and the preset performance into the vehicle control unit through the FAT table, and controlling the vehicle equipment by the vehicle control unit.

5. The cold-chain logistics vehicle function self-checking method of claim 4, wherein: the FAT table comprises a refrigeration function parameter, a refrigeration performance parameter, a power generation function parameter, a power generation performance parameter, a cold chain carriage pressure parameter, a vehicle controller function parameter and a vehicle controller performance parameter;

and the data of the FAT table is obtained by calculating the power and proportion required by the vehicle-mounted module called by the vehicle controller, the CAN analysis instrument and the system and the numerical value of power distribution.

6. The cold-chain logistics vehicle function self-checking method of claim 5, wherein: the refrigeration function parameters and the refrigeration performance parameters are calculated by the refrigeration efficiency, the refrigeration time, the pressure and the power of the enthalpy difference close to the wall surface, which are required by the system to call refrigeration related components.

7. The cold-chain logistics vehicle function self-checking method of claim 5, wherein: the cold chain carriage is provided with a pressure sensor, and the pressure sensor is used for detecting the air tightness of the cold chain carriage;

detecting a first pressure parameter of the cold chain compartment through a pressure sensor at intervals in the cold chain compartment, and comparing the detected first pressure parameter with the pressure parameter of the cold chain compartment;

when the detected first pressure parameter does not accord with the pressure parameter of the cold chain vehicle, judging whether the sealing strip of the cold chain compartment has a problem or not;

on the premise that the booster pump is arranged on the sealing strip, a second pressure parameter of the cold chain compartment is still detected at intervals in the cold chain compartment through the pressure sensor, and the detected second pressure parameter is compared with the pressure parameter of the cold chain compartment;

when the detected second pressure parameter does not accord with the pressure parameter of the cold chain vehicle, judging that the sealing strip of the cold chain compartment has a problem, and replacing the sealing strip;

and when the detected second pressure parameter accords with the pressure parameter of the cold chain vehicle, judging that the cold chain compartment has a problem.

8. The cold-chain logistics vehicle function self-checking method of claim 3, characterized in that: and on the premise that the whole vehicle works at the same time with the cooler and the air conditioner, calculating the functions and performances of the replaced parts and related parts of the vehicle during acceleration, braking, charging and cooling.

9. The cold-chain logistics vehicle function self-checking method of claim 3, characterized in that: and when the functions or performances of the replaced parts and the related parts are judged to meet the standard, determining the time period for replacing the replaced parts again, and recalculating the loss and power loss ratio of the replaced parts to obtain the energy consumption numerical standard of the system.

10. The utility model provides a cold chain logistics car, be provided with storage medium on the cold chain logistics car, storage medium has stored computer program on it which characterized in that: the program is executed by a processor to realize the self-checking method of the function of the cold-chain logistics vehicle as claimed in any one of claims 2 to 9.

Technical Field

The invention relates to the technical field of cold-chain logistics vehicles, in particular to a function self-checking system and a function self-checking method of a cold-chain logistics vehicle and the cold-chain logistics vehicle.

Background

The cold-chain logistics vehicle is used as a special vehicle and has high specificity. The cold-chain logistics vehicle is mainly used for long-distance transportation and short-distance store distribution of deformable, easily fermented, perishable and easily-rotten goods such as beef and mutton rolls, fresh milk, seafood, fruits and the like, has the advantages of flexibility, convenience, rapidness, strong adaptability, few intermediate links, capability of realizing door-to-door, store-to-store, store-to-point transportation and the like, and the cold-chain logistics transportation becomes an important component of logistics.

For cold chain logistics vehicles, the safety of the goods during transportation is very important. After the cold-chain logistics vehicle breaks down and overhauls and replaces parts, the detection of the system level can only pass the detection and running-in of a laboratory. However, it is not possible to detect whether the replacement part can meet the long-term transportation requirements and whether the function and performance of the replacement part and the related parts can be met.

Disclosure of Invention

Therefore, a function self-checking system and a self-checking method for a cold-chain logistics vehicle and the cold-chain logistics vehicle are needed to be provided, so that the technical problems that whether the replacement part of the existing cold-chain logistics vehicle can meet the long-time transportation requirement and whether the replacement part and the functions and performances of related parts can not be detected are solved.

In order to achieve the above object, the inventor provides a cold-chain logistics vehicle function self-checking system, which comprises a self-checking unit, a control unit, an analysis unit and an alarm unit, wherein the self-checking unit is used for detecting the functions and performances of a replaced part and related parts after the vehicle is replaced;

the control unit is used for controlling the self-checking unit to enable the self-checking unit to normally operate;

the analysis unit is used for comparing and analyzing the functions and performances detected by the self-checking unit with preset functions and preset performances respectively to obtain self-checking results;

and the alarm unit is used for sending out alarm information according to the self-checking result.

Different from the prior art, the technical scheme provides a self-checking system, the self-checking unit is used for detecting the functions and performances of the replaced part and the related parts, the control unit is used for ensuring the normal operation of the self-checking unit, and the analysis unit is used for comparing and analyzing to obtain a self-checking result. If the self-checking result does not meet the standard, the alarm unit sends out alarm information. And if the self-checking result meets the standard, no alarm is given. The self-checking system can guarantee that the fault problem is really solved by replacing the parts through self-checking, and the certain functions and performances are exerted, so that the long-time transportation requirement of the cold-chain logistics vehicle is met.

In order to achieve the above object, the inventor further provides a cold-chain logistics vehicle function self-checking method, which is implemented by the cold-chain logistics vehicle function self-checking system provided above.

Further, the method comprises the following steps:

detecting whether the functions and performances of the replaced parts and related parts reach the standard or not after the parts are replaced by the vehicle;

judging whether the functions of the replacement part and the related part meet the preset function or not;

judging whether the performances of the replacement part and the related part meet the preset performance;

and when the function or performance of the replacement part or the related part is judged not to meet the standard, an alarm is given.

Further, the preset function and the preset performance are input into the vehicle controller through the FAT table, and then the vehicle controller controls the vehicle equipment.

Further, the FAT table comprises a refrigeration function parameter, a refrigeration performance parameter, a power generation function parameter, a power generation performance parameter, a cold chain compartment pressure parameter, a vehicle controller function parameter and a vehicle controller performance parameter;

and the data of the FAT table is obtained by calculating the power and proportion required by the vehicle-mounted module called by the vehicle controller, the CAN analysis instrument and the system and the numerical value of power distribution.

Furthermore, the refrigeration function parameter and the refrigeration performance parameter are calculated by the refrigeration efficiency, the refrigeration time, the pressure and the power of the enthalpy difference close to the wall surface which are required by the system for calling the refrigeration related components.

Further, a pressure sensor is arranged on the cold chain carriage and used for detecting the air tightness of the cold chain carriage;

detecting a first pressure parameter of the cold chain compartment through a pressure sensor at intervals in the cold chain compartment, and comparing the detected first pressure parameter with the pressure parameter of the cold chain compartment;

when the detected first pressure parameter does not accord with the pressure parameter of the cold chain vehicle, judging whether the sealing strip of the cold chain compartment has a problem or not, and replacing the sealing strip;

on the premise that the booster pump is arranged on the sealing strip, a second pressure parameter of the cold chain compartment is still detected at intervals in the cold chain compartment through the pressure sensor, and the detected second pressure parameter is compared with the pressure parameter of the cold chain compartment;

when the detected second pressure parameter does not accord with the pressure parameter of the cold chain vehicle, judging that the sealing strip of the cold chain compartment has a problem;

and when the detected second pressure parameter accords with the pressure parameter of the cold chain vehicle, judging that the cold chain compartment has a problem.

Further, on the premise that the whole vehicle works in a cold machine and an air conditioner at the same time, the functions and performances of the replaced parts and related parts of the vehicle during acceleration, braking, charging and cooling are calculated.

Further, when the function or performance of the replaced part and the related parts is judged to meet the standard, the time period for replacing the replaced part again is determined, the loss and power loss ratio of the replaced part is recalculated, and the energy consumption numerical value standard of the system is obtained.

Different from the prior art, the technical scheme provides a self-checking system, the self-checking unit is used for detecting the functions and performances of the replaced part and the related parts, the control unit is used for ensuring the normal operation of the self-checking unit, and the analysis unit is used for comparing and analyzing to obtain a self-checking result. If the self-checking result does not meet the standard, the alarm unit sends out alarm information. And if the self-checking result meets the standard, no alarm is given. The self-checking system can guarantee that the fault problem is really solved by replacing the parts through self-checking, and the certain functions and performances are exerted, so that the long-time transportation requirement of the cold-chain logistics vehicle is met.

In order to achieve the above object, the inventor further provides a cold-chain logistics vehicle, wherein a storage medium is arranged on the cold-chain logistics vehicle, and a computer program is stored on the storage medium, and when being executed by a processor, the cold-chain logistics vehicle function self-checking method provided in any one of the above aspects is achieved.

Different from the prior art, the technical scheme provides a self-checking system, the self-checking unit is used for detecting the functions and performances of the replaced part and the related parts, the control unit is used for ensuring the normal operation of the self-checking unit, and the analysis unit is used for comparing and analyzing to obtain a self-checking result. If the self-checking result does not meet the standard, the alarm unit sends out alarm information. And if the self-checking result meets the standard, no alarm is given. The self-checking system can guarantee that the fault problem is really solved by replacing the parts through self-checking, and the certain functions and performances are exerted, so that the long-time transportation requirement of the cold-chain logistics vehicle is met.

Drawings

FIG. 1 is a schematic structural diagram of a cold-chain logistics vehicle according to an embodiment;

FIG. 2 is a schematic block diagram of a cold-chain logistics vehicle according to an embodiment;

FIG. 3 is a schematic diagram of a functional self-inspection system of a cold-chain logistics vehicle according to an embodiment;

fig. 4 is a schematic flow chart of a function self-checking method of a cold-chain logistics vehicle according to a specific embodiment.

Description of reference numerals:

1. a drive battery;

2. a range-extended power generation device;

3. a drive motor;

4. a low-temperature compartment;

5. a refrigeration unit;

6. and (7) wheels.

Detailed Description

To explain technical contents, structural features, and objects and effects of the technical solutions in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.

In the description of the present application, unless explicitly stated or limited otherwise, the terms "first", "second", and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless specified or indicated otherwise; the terms "connected," "fixed," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, integrally connected, or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", and the like used in the embodiments of the present application are described with reference to the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In addition, in this context, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on "or" under "the other element or be indirectly on" or "under" the other element via an intermediate element.

Referring to fig. 1, the present embodiment provides a cold-chain logistics vehicle, where a storage medium is disposed on the cold-chain logistics vehicle, and a computer program is stored on the storage medium, and when the computer program is executed by a processor, the method for self-checking the function of the cold-chain logistics vehicle is implemented. The self-checking can carry out the self-checking immediately after the car is repaired, and if an alarm is given, the maintenance point can be maintained again according to the alarm result, so that the vehicle fault can be finally solved.

A low-temperature compartment 4 and a refrigerating unit 5 are arranged in the compartment of the cold-chain logistics vehicle, and the refrigerating unit 5 is used for refrigerating the low-temperature storage space; the refrigerating unit 5 is arranged at the top of the carriage, and the top of the refrigerating unit 5 extends out of the top of the carriage. In order to mount the refrigerating unit 5, an opening slightly larger than the refrigerating unit 5 is formed in the top of the vehicle compartment, and then the refrigerating unit 5 is mounted in the opening, and the bottom of the refrigerating unit 5 extends into the vehicle compartment through the opening. The refrigerating unit 5 can be a heat pump refrigerating unit 5, and structurally the refrigerating unit 5 adopts an integral structure, the refrigerating unit 5 comprises a shell, a compressor, a radiator and a condenser, and the compressor, the radiator and the condenser are arranged in the shell. The compressor, the radiator and the condenser are connected through metal pipelines, a refrigerant circulates inside the compressor, the refrigerant is compressed through the compressor, and after the heat of the refrigerant is dissipated by the radiator, the refrigerant expands in the evaporator to absorb heat, so that the low-temperature carriage 4 is refrigerated. The top of the refrigerating unit 5 exchanges heat with the outside air, and the bottom of the refrigerating unit 5 cools the air in the low-temperature compartment 4. In order to prevent the cold air in the low-temperature compartment 4 from diffusing outwards, the inner wall of the low-temperature compartment 4 is provided with a heat insulation layer.

Preferably, the length of the body of the cold-chain logistics vehicle can be 4.5 meters to 5.99 meters, and the refrigerating unit 5 is used for refrigerating the inner space of the low-temperature compartment 4, so that the low-temperature compartment 4 is kept in a set low-temperature range (for example, -70 degrees to 5 degrees) when transporting goods.

As shown in fig. 2, as a preferred embodiment, the cold-chain logistics vehicle is an extended-range cold-chain logistics vehicle, and is provided with a driving battery 1, a driving motor 3 and an extended-range power generation device 2. The driving motor 3 is in transmission connection with the wheels 6 and used for driving the logistics vehicle to run, the driving battery 1 is electrically connected with the driving motor 3, and the driving battery 1 is used for supplying power to the driving motor 3. The refrigerating unit 5 is also electrically connected with the driving battery 1, and the driving battery 1 supplies power to the refrigerating unit 5. The range-extending power generation device 2 is electrically connected with the driving battery 1 and is used for supplementing power to the driving battery 1, so that the cruising mileage of the cold-chain logistics vehicle is improved. The logistics vehicle is provided with the range-extending power generation device 2, and the range-extending power generation device 2 can generate power and charge the driving battery 1, so that the cruising mileage of the cold-chain logistics vehicle is improved. The range-extended power generation device 2 can supplement power for the driving battery 1 and can also directly drive the driving motor 3 to work without directly driving the driving motor 3 through the driving battery 1.

In the present embodiment, the range-extended power generation device 2 includes an engine and a generator, the engine is used for driving the generator to generate power, the generator is electrically connected to the driving battery, and the generator is used for supplementing power to the driving battery. The engine is used for converting thermal energy generated by fuel combustion into mechanical energy, and then driving the generator to rotate and generate electricity through the mechanical energy. In the present embodiment, the engine is a gasoline engine, and preferably, the engine is an atkinson engine with a displacement of 1.5L.

A Vehicle Control Unit (VCU) judges the driving intention of a driver by acquiring signals of an accelerator pedal, gears, a brake pedal and the like; the method comprises the steps that by monitoring vehicle state (vehicle speed, temperature and the like), after being judged and processed by a VCU, running state control instructions of vehicles are sent to a power system and a power battery system, and meanwhile, the working mode of a vehicle-mounted accessory power system is controlled; the VCU has the functions of fault diagnosis, protection and storage of the whole vehicle system.

The file Allocation table fat (file Allocation table) is a table used to describe the Allocation status of the storage unit in the file system and the front-back link relationship of the file content.

Referring to fig. 3, the present embodiment provides a cold-chain logistics vehicle function self-checking system, which includes a self-checking unit, a control unit, an analysis unit, and an alarm unit, where the self-checking unit is configured to detect functions and performances of a replaced component and related components after the vehicle is replaced with the component; the control unit is used for controlling the self-checking unit to enable the self-checking unit to normally operate; the analysis unit is used for comparing and analyzing the functions and performances detected by the self-checking unit with preset functions and preset performances respectively to obtain self-checking results; and the alarm unit is used for sending out alarm information according to the self-checking result.

The technical scheme provides a self-checking system, the self-checking unit is used for detecting functions and performances of a replaced part and related parts, the control unit is used for ensuring that the self-checking unit can normally operate, and the analysis unit is used for comparing and analyzing to obtain a self-checking result. If the self-checking result does not meet the standard, the alarm unit sends out alarm information. And if the self-checking result meets the standard, no alarm is given. The self-checking system can guarantee that the fault problem is really solved by replacing the parts through self-checking, and the certain functions and performances are exerted, so that the long-time transportation requirement of the cold-chain logistics vehicle is met.

Referring to fig. 4, the embodiment further provides a function self-checking method for a cold-chain logistics vehicle, where the function self-checking method for a cold-chain logistics vehicle is implemented by the function self-checking system for a cold-chain logistics vehicle. Specifically, the cold-chain logistics vehicle function self-checking method comprises the following steps:

s01: detecting whether the functions and performances of the replaced parts and related parts reach the standard or not after the parts are replaced by the vehicle;

s011: judging whether the functions of the replacement part and the related part meet the preset function or not;

s012: judging whether the performances of the replacement part and the related part meet the preset performance;

s02: and when the function or performance of the replacement part or the related part is judged not to meet the standard, an alarm is given.

When a vehicle breaks down and is overhauled, the function is found to be in a problem, and then specific parts are judged to be in a problem. Therefore, in order to ensure that the vehicle failure can be resolved after the replacement of the component. In addition to detecting whether the replacement part is to achieve the relevant function and performance, the function or performance of the relevant part is also detected, which can avoid that a vehicle fault still exists when the function and performance of the replacement part is normal. The vehicle fault is resolved only when the functions and performances of the replacement component and the related component satisfy the preset functions and the preset performances. And when the function or performance of the replacement part or the related part is not up to the standard, an alarm is given. The self-checking can carry out the self-checking immediately after the car is repaired, and if an alarm is given, the maintenance point can be maintained again according to the alarm result, so that the vehicle fault can be finally solved.

Further, the preset function and the preset performance are input into the vehicle controller through the FAT table, and then the vehicle controller controls the vehicle equipment. The FAT table is mainly used for expressing various parameters of the vehicle and comprises refrigeration function parameters (refrigeration), refrigeration performance parameters (at least 80%), power generation function parameters (power generation and power supply), power generation performance parameters (at least 70% for power generation and at least 65% for power supply), cold chain compartment pressure parameters, vehicle control unit function parameters and vehicle control unit performance parameters. Various parameters of the vehicle are input into the vehicle control unit, and the vehicle control unit controls the vehicle equipment through the parameters. As an embodiment, when the power generation of the extended-range power generation device is in a problem, the engine is maintained and replaced, the function and performance of the engine and the function and performance of relevant parts (an oil tank and an oil pump) of the engine also need to be detected, whether the function of the engine can normally convert fuel oil into electric energy to the power generator is judged, and meanwhile, whether the oil tank can normally supply oil and whether the oil pump can normally provide power is also judged; whether the power generation efficiency of the engine can reach the preset power generation efficiency or not is judged, whether the oil outlet quantity of the oil tank reaches the preset oil outlet quantity or not is judged, and whether the pressure of the oil pump reaches the preset pressure or not is judged. An alarm may be generated when one of the functions or capabilities of the engine or engine related components is met. Only when the functions or performances of the engine or the related parts of the engine reach the standard, the alarm reminding can not be sent out.

Further, on the premise that the whole vehicle works in a cold machine and an air conditioner at the same time, the functions and performances of the replaced parts and related parts of the vehicle during acceleration, braking, charging and cooling are calculated.

Further, the data of the FAT table is obtained through numerical calculation of power and proportion required by the vehicle controller, the CAN analysis instrument and the vehicle interior module called by the system and power distribution. In order to ensure that the parameters in the FAT table are consistent with the precondition during the self-inspection of the vehicle, the parameter calculation of the FAT table is also used for calculating a refrigeration function parameter, a refrigeration performance parameter, a power generation function parameter, a power generation performance parameter, a cold chain carriage pressure parameter, a vehicle controller function parameter and a vehicle controller performance parameter on the premise that the whole vehicle works at the same time of a refrigerator and an air conditioner. Preferably, the refrigeration function parameter and the refrigeration performance parameter are calculated by the refrigeration efficiency, the refrigeration time, the pressure and the power of the enthalpy difference close to the wall surface, which are required by the system to call the refrigeration related components.

Further, in addition to detecting the function and performance of the replacement parts and related parts, the sealability of the cold chain car is also detected. The cold chain carriage is provided with a pressure sensor, and the pressure sensor is used for detecting the air tightness of the cold chain carriage; detecting a first pressure parameter of the cold chain compartment through a pressure sensor at intervals in the cold chain compartment, and comparing the detected first pressure parameter with the pressure parameter of the cold chain compartment; when the detected first pressure parameter does not accord with the pressure parameter of the cold chain vehicle, judging whether the sealing strip of the cold chain compartment has a problem or not; on the premise that the booster pump is arranged on the sealing strip, a second pressure parameter of the cold chain compartment is still detected at intervals in the cold chain compartment through the pressure sensor, and the detected second pressure parameter is compared with the pressure parameter of the cold chain compartment; when the detected second pressure parameter does not accord with the pressure parameter of the cold chain vehicle, judging that the sealing strip of the cold chain compartment has a problem, and replacing the sealing strip; and when the detected second pressure parameter accords with the pressure parameter of the cold chain vehicle, judging that the cold chain compartment has a problem. The interval time can be half an hour apart or one hour apart, and the first pressure parameter and the second pressure parameter of the cold chain car are detected by the pressure sensor. When the detected first pressure parameter accords with the pressure parameter of the cold chain vehicle, the sealing performance of the cold chain compartment is not problematic.

Further, when the function or performance of the replaced part and the related parts is judged to meet the standard, the time period for replacing the replaced part again is determined, the loss and power loss ratio of the replaced part is recalculated, and the energy consumption numerical value standard of the system is obtained.

And further, when the vehicle controller is self-checked, the CAN simulator is connected, the execution and response timeliness of the evaporator electromagnetic valve, the main relay and the air-conditioning relay are determined by self-control execution pedal opening and a pressure power curve of the vacuum pump, and whether the high-low level output voltage value is within a rated range after response is obtained.

Different from the prior art, the technical scheme provides a self-checking system, the self-checking unit is used for detecting the functions and performances of the replaced part and the related parts, the control unit is used for ensuring the normal operation of the self-checking unit, and the analysis unit is used for comparing and analyzing to obtain a self-checking result. If the self-checking result does not meet the standard, the alarm unit sends out alarm information. And if the self-checking result meets the standard, no alarm is given. The self-checking system can guarantee that the fault problem is really solved by replacing the parts through self-checking, and the certain functions and performances are exerted, so that the long-time transportation requirement of the cold-chain logistics vehicle is met.

It should be noted that, although the above embodiments have been described herein, the invention is not limited thereto. Therefore, based on the innovative concepts of the present invention, the technical solutions of the present invention can be directly or indirectly applied to other related technical fields by making changes and modifications to the embodiments described herein, or by using equivalent structures or equivalent processes performed in the content of the present specification and the attached drawings, which are included in the scope of the present invention.