CN-119759142-B - Cold chain transportation temperature control system, temperature control method and cold chain equipment

CN119759142BCN 119759142 BCN119759142 BCN 119759142BCN-119759142-B

Abstract

The application provides a cold chain transportation temperature control system, a temperature control method and cold chain equipment, wherein the system comprises a miniature electronic mechanical system sensor, a microcontroller, a control module, a compressor and a fan, the miniature electronic mechanical system sensor is used for monitoring vibration signals of the cold chain equipment, the vibration signals are used for representing vibration states of the cold chain equipment, the microcontroller is used for carrying out signal processing on the vibration signals to obtain vibration characteristic data, analyzing the vibration states of the cold chain equipment according to the vibration characteristic data, determining a compressor power adjustment value and a fan rotating speed adjustment value according to the vibration characteristic data when the vibration states are abnormal states, and the control module is used for adjusting the power of the compressor according to the compressor power adjustment value and adjusting the rotating speed of the fan according to the fan rotating speed adjustment value. The temperature control effect of the cold chain equipment in the vibration environment is ensured.

Inventors

LI JIANTAO
MING KAIYUN
YANG YIFAN
ZOU JIAYU

Assignees

珠海格力电器股份有限公司

Dates

Publication Date: 20260508
Application Date: 20241220

Claims (9)

1. The cold chain transportation temperature control system is characterized by comprising a miniature electronic mechanical system sensor, a microcontroller, a control module, a compressor and a fan; the micro-electromechanical system sensor is used for monitoring vibration signals of cold chain equipment, wherein the vibration signals are used for representing the vibration state of the cold chain equipment; The microcontroller is used for carrying out signal processing on the vibration signal to obtain vibration characteristic data, analyzing the vibration state of the cold chain equipment according to the vibration characteristic data, and determining a compressor power adjustment value and a fan rotating speed adjustment value according to the vibration characteristic data under the condition that the vibration state is abnormal; The control module is used for adjusting the power of the compressor according to the power adjustment value of the compressor and adjusting the rotating speed of the fan according to the rotating speed adjustment value of the fan; The microcontroller is further configured to determine a second target range in which the vibration characteristic data is located in a plurality of mode ranges, where the vibration characteristic data includes a vibration average amplitude and a vibration frequency, determine a vibration mode corresponding to the second target range as a second target mode, determine a power adjustment coefficient corresponding to the second target mode as a target power coefficient, substitute the target power coefficient and the characteristic data into a first preset formula to obtain the compressor power adjustment value, determine a rotation speed adjustment coefficient corresponding to the second target mode as a target rotation speed coefficient, and substitute the target rotation speed coefficient and the characteristic data into a second preset formula to obtain the fan rotation speed adjustment value, where the first preset formula and the second preset formula are specifically as follows: A first preset formula: ; A second preset formula: ; Wherein, the For the average amplitude of the vibrations, In order for the frequency of the vibration to be the same, For the compressor power adjustment value, And As a result of the power coefficient of the target, For the fan rotational speed adjustment value, And Is the target rotation speed coefficient.
2. The system of claim 1, wherein the system further comprises a storage module; The storage module is used for storing abnormal vibration data, wherein the abnormal vibration data refer to vibration characteristic data exceeding a preset safety threshold range; The microcontroller is further configured to perform clustering operation on the plurality of abnormal vibration data stored in the storage module in a history manner, so as to divide the plurality of abnormal vibration data into a plurality of vibration modes, extract vibration parameters corresponding to the vibration modes and obtain initial adjustment parameters corresponding to the vibration modes for each vibration mode, and fit corresponding power adjustment coefficients and rotation speed adjustment coefficients according to the vibration parameters and the initial adjustment parameters.
3. The system of claim 2, wherein the storage module is further configured to store an adjustment effect, wherein the adjustment effect includes temperature fluctuation data and energy consumption data; And the microcontroller is also used for optimizing the power adjustment coefficient and the rotation speed adjustment coefficient corresponding to each vibration mode according to the temperature fluctuation data and the energy consumption data so as to achieve the aim of minimizing temperature control errors and energy consumption.
4. The system of claim 1, wherein the microcontroller is further configured to send a restoration instruction to the control module to restore the original set value if the vibration state is restored to a normal state; And the control module is used for controlling the compressor and the fan to gradually restore to the original set value according to the instruction of the restoration instruction.
5. The system of claim 1, wherein the system further comprises an alarm device; the microcontroller is also used for sending an alarm instruction to the alarm device under the condition that the vibration state is an abnormal state; The alarm device is used for executing alarm operation according to the indication of the alarm instruction.
6. The system of claim 1, wherein the microcontroller is further configured to compare the vibration signature data to a preset safety threshold range and determine that the vibration condition is an abnormal condition if the vibration signature data exceeds the safety threshold range.
7. The system of claim 1, wherein the microcontroller is further configured to perform data preprocessing on the vibration signal through a low-pass filter to obtain target data, and perform feature extraction on the target data to obtain the vibration feature data.
8. A method of temperature control, the method comprising: Monitoring a vibration signal of a cold chain device, wherein the vibration signal is used for representing the vibration state of the cold chain device; performing signal processing on the vibration signal to obtain vibration characteristic data; analyzing the vibration state of the cold chain equipment according to the vibration characteristic data; determining a compressor power adjustment value and a fan rotation speed adjustment value according to the vibration characteristic data under the condition that the vibration state is an abnormal state; Adjusting the power of a compressor in the cold chain equipment according to the power adjustment value of the compressor, and adjusting the rotating speed of a fan in the cold chain equipment according to the rotating speed adjustment value of the fan; The method further comprises the steps of determining a second target range in which the vibration characteristic data are located in a plurality of mode ranges, wherein the vibration characteristic data comprise vibration average amplitude and vibration frequency, determining a vibration mode corresponding to the second target range as a second target mode, determining a power adjustment coefficient corresponding to the second target mode as a target power coefficient, substituting the target power coefficient and the characteristic data into a first preset formula to obtain the compressor power adjustment value, determining a rotation speed adjustment coefficient corresponding to the second target mode as a target rotation speed coefficient, substituting the target rotation speed coefficient and the characteristic data into a second preset formula to obtain the fan rotation speed adjustment value, wherein the first preset formula and the second preset formula are specifically as follows: A first preset formula: ; A second preset formula: ; Wherein, the For the average amplitude of the vibrations, In order for the frequency of the vibration to be the same, For the compressor power adjustment value, And As a result of the power coefficient of the target, For the fan rotational speed adjustment value, And Is the target rotation speed coefficient.
9. A cold chain apparatus comprising a cold chain transportation temperature control system, wherein the cold chain transportation temperature control system is the cold chain transportation temperature control system according to any one of claims 1 to 7, or the temperature control method of the cold chain transportation temperature control system comprises the temperature control method of the cold chain transportation temperature control system according to claim 8.

Description

Cold chain transportation temperature control system, temperature control method and cold chain equipment Technical Field The application relates to the technical field of cold chain transportation, in particular to a cold chain transportation temperature control system, a temperature control method and cold chain equipment. Background Cold chain transportation (Cold-chain transportation) refers to transportation in which the transported goods always maintain a certain temperature in the whole transportation process, regardless of links such as loading, unloading, transporting, changing transportation modes, changing packaging equipment and the like. Cold chain transport is widely used in the logistics distribution of goods (such as food, pharmaceutical and biological products) that are subject to severe demands on the temperature environment. The cold chain device typically implements temperature control with a compressor, fan, and PID (Proportional INTEGRAL DERIVATIVE) controller. In long-distance transportation, cold chain equipment is subjected to long-time vibration and impact due to road conditions and vehicle conditions, so that core components such as a compressor, a fan and the like are unstable in performance, and temperature fluctuation is caused. The conventional PID control can maintain the temperature in a stable environment, but under the condition of frequent vibration for a long time, the problem of insufficient response may occur, even the system is caused to enter a 'frequent regulation' state, and the energy consumption is increased. In addition, vibrations can affect the hardware of the device, accelerating aging. Therefore, there is a need for an intelligent temperature control system that can be adaptively adjusted and self-repaired to ensure the temperature control effect in a vibrating environment. Disclosure of Invention The application provides a cold chain transportation temperature control system, a temperature control method and cold chain equipment, which are used for solving the problem that the response is not rapid enough under the condition of frequent vibration for a long time in the traditional PID control in the prior art. In a first aspect, the present application provides a cold chain transportation temperature control system comprising: The micro electronic mechanical system comprises a micro electronic mechanical system sensor, a microcontroller, a control module, a compressor and a fan; the micro-electromechanical system sensor is used for monitoring vibration signals of cold chain equipment, wherein the vibration signals are used for representing the vibration state of the cold chain equipment; The microcontroller is used for carrying out signal processing on the vibration signal to obtain vibration characteristic data, analyzing the vibration state of the cold chain equipment according to the vibration characteristic data, and determining a compressor power adjustment value and a fan rotating speed adjustment value according to the vibration characteristic data under the condition that the vibration state is abnormal; The control module is used for adjusting the power of the compressor according to the power adjustment value of the compressor and adjusting the rotating speed of the fan according to the rotating speed adjustment value of the fan. In one possible embodiment, the microcontroller is further configured to determine a first target range in which the vibration characteristic data is located from among a plurality of mode ranges, determine a vibration mode corresponding to the first target range as a first target mode, determine a power adjustment parameter corresponding to the first target mode as the compressor power adjustment value, and determine a rotational speed adjustment parameter corresponding to the first target mode as the fan rotational speed adjustment value. In one possible implementation manner, the microcontroller is further configured to determine a second target range in which the vibration characteristic data is located in a plurality of mode ranges, where the vibration characteristic data includes a vibration average amplitude and a vibration frequency, determine a vibration mode corresponding to the second target range as a second target mode, determine a power adjustment coefficient corresponding to the second target mode as a target power coefficient, substitute the target power coefficient and the characteristic data into a first preset formula to obtain the compressor power adjustment value, and determine a rotation speed adjustment coefficient corresponding to the second target mode as a target rotation speed coefficient, substitute the target rotation speed coefficient and the characteristic data into a second preset formula to obtain the fan rotation speed adjustment value, where the first preset formula and the second preset formula are specifically as follows: a first preset formula, namely deltap= -k 1Aavg-k2favg; A second