CN-121576752-B - Constant temperature control method, system and equipment applied to refrigeration workshop

CN121576752BCN 121576752 BCN121576752 BCN 121576752BCN-121576752-B

Abstract

The invention relates to the technical field of control of a freezing workshop, in particular to a constant temperature control method, a constant temperature control system and constant temperature control equipment applied to the freezing workshop. The invention firstly obtains the temperature anomaly coefficient according to the local time sequence fluctuation of the refrigeration temperature of the refrigeration device, and preliminarily determines the regulation and control instruction by combining the deviation condition of the temperature anomaly coefficient, analyzes the variation relation between the refrigeration temperature difference and the refrigeration power of the refrigeration device to be researched and judged and the difference of the temperature anomaly coefficient corresponding to different refrigeration devices, screens out the specific refrigeration device, and further determines the regulation and control instruction again according to the time sequence fluctuation characteristics of the refrigeration temperature, the refrigeration temperature difference and the refrigeration power. According to the invention, firstly, the fluctuation of the refrigerating temperature of the refrigerating device is analyzed and the deviation situation of the target is further compared and analyzed to evaluate the refrigerating performance of different refrigerating devices, so that the regulation and control necessity of the refrigerating device is accurately evaluated, the regulation and control instruction is determined to regulate and control at a constant temperature, the frequent regulation and control of the whole body is avoided, and the constant temperature regulation and control effect is improved.

Inventors

SONG YINGHUI
YANG BAOJUN
ZHANG HU

Assignees

天津全津食品有限公司

Dates

Publication Date: 20260512
Application Date: 20251230

Claims (9)

1. A thermostatic control method applied to a refrigeration plant, characterized in that it comprises: Acquiring the refrigeration power and the refrigeration temperature of each refrigeration device in a refrigeration workshop at each acquisition time and the refrigeration temperature difference of the refrigeration temperature relative to the external environment temperature of the refrigeration workshop in a preset historical period of the time to be regulated; For each refrigerating device, acquiring a temperature anomaly coefficient corresponding to the acquisition time according to the local time sequence fluctuation characteristic of each refrigerating temperature, and determining a regulating instruction of the refrigerating device by combining the deviation characteristic of each refrigerating temperature, wherein the refrigerating device performs constant temperature control based on the regulating instruction, and the regulating instruction comprises regulation, non-regulation and judgment to be performed; For each refrigerating device with a regulating instruction to be researched and judged, acquiring a refrigerating specific coefficient according to the change relation between the refrigerating temperature difference and the refrigerating power and the time sequence fluctuation difference between the temperature abnormality coefficients corresponding to different refrigerating devices; setting the regulation and control instruction of the non-specific refrigeration device as non-regulation and control, and re-determining the regulation and control instruction according to the time sequence fluctuation characteristics of the refrigeration temperature, the refrigeration temperature difference and the refrigeration power for each specific refrigeration device; the method for acquiring the temperature anomaly coefficient comprises the following steps: For each refrigeration temperature, constructing a time analysis window with a preset length, fitting a temperature time sequence of the refrigeration temperature in the time analysis window, and performing STL decomposition on the temperature time sequence to obtain a trend item and a period item; and acquiring a temperature anomaly coefficient of each refrigeration temperature corresponding to the acquisition time according to the change trend of the upper envelope line and the lower envelope line of the period item and the change trend of the trend item.
2. The method for controlling the constant temperature of a refrigeration plant according to claim 1, wherein the method for acquiring the control command comprises: A first abnormal label is given to each acquisition time based on the temperature abnormal coefficient, and a second abnormal label is given to each acquisition time based on the deviation condition of the refrigeration temperature relative to a preset target temperature; Taking the acquisition time with the first abnormal label and the second abnormal label at the same time as abnormal time, taking the acquisition time without the first abnormal label and the second abnormal label at different times as normal time, and taking the rest acquisition time as fuzzy time; The method comprises the steps of respectively calculating the quantity proportion of abnormal time, normal time and fuzzy time in a preset historical period, regulating and controlling an instruction when the quantity proportion of the abnormal time is larger than the preset proportion, not regulating and controlling the instruction when the quantity proportion of the normal time is larger than the preset proportion, judging the regulating and controlling instruction when the quantity proportion of the fuzzy time is larger than the preset proportion, and enabling the preset proportion to be larger than 0.5.
3. The method for controlling the constant temperature of a refrigeration plant according to claim 1, wherein the method for obtaining the refrigeration specific factor comprises: For each refrigeration device to be judged, acquiring refrigeration abnormal parameters based on the linear relation between the refrigeration temperature difference and the refrigeration power; For each low abnormality device, acquiring a low abnormality specific parameter according to the time sequence fluctuation difference in a preset history period according to the temperature abnormality coefficients corresponding to the low abnormality devices and the rest low abnormality devices; And for each high anomaly device, acquiring a high anomaly specific parameter according to the time sequence fluctuation difference in a preset history period according to the temperature anomaly coefficient corresponding to each high anomaly device and each low anomaly device, and fusing the high anomaly specific parameter and the refrigeration anomaly parameter to acquire the refrigeration specific coefficient corresponding to the high anomaly device.
4. The method for controlling the constant temperature of a refrigeration plant according to claim 3, wherein the method for obtaining the refrigeration anomaly parameter comprises: Performing linear fitting on the refrigerating power and the refrigerating temperature difference of the refrigerating device in a preset history period to obtain a decisive coefficient and a refrigerating power change curve in the linear fitting process; and acquiring refrigeration abnormal parameters according to the negative correlation mapping result of the decisive coefficient, the change slope of the refrigeration power change curve and the fitting deviation of the refrigeration power at each acquisition time.
5. The method for controlling the constant temperature of a refrigeration plant according to claim 1, wherein the method for obtaining the specific refrigeration device comprises the steps of: And taking the refrigerating device to be researched and judged, of which the refrigerating specific coefficient is larger than a preset specific threshold value, as a specific refrigerating device.
6. The method of claim 1, wherein redefining the regulatory command comprises: Determining a reference fluctuation range of each target index according to fluctuation characteristics of each target index of the refrigeration device which is not regulated by all regulation and control instructions in a preset history period; And setting the regulation and control instruction of the specific refrigerating device with the normal parameter larger than a preset normal threshold value as non-regulation and setting the regulation and control instruction of the specific refrigerating device with the normal parameter smaller than or equal to the preset normal threshold value as regulation and control according to the fluctuation deviation condition of each target index corresponding to the reference fluctuation range in the preset history period.
7. The method for controlling the constant temperature of a refrigeration plant according to claim 6, wherein the method for acquiring the normal parameters comprises: And in a preset history period, acquiring a first normal parameter according to the fluctuation deviation frequency of each target index relative to the corresponding reference fluctuation range, acquiring a second normal parameter according to the deviation of each target index relative to the corresponding reference fluctuation range and the time sequence variation trend of the deviation, and fusing the first normal parameter and the second normal parameter to acquire the normal parameters.
8. A thermostatic control system for a freezer, for implementing the thermostatic control method for a freezer according to any one of claims 1 to 7, characterized in that the system comprises: The refrigeration monitoring module is used for acquiring the refrigeration power and the refrigeration temperature of each refrigeration device in the refrigeration workshop at each acquisition time and the refrigeration temperature difference of the refrigeration temperature relative to the external environment temperature of the refrigeration workshop in a preset historical period of the time to be regulated; The regulation judging module is used for obtaining temperature anomaly coefficients corresponding to acquisition time according to local time sequence fluctuation characteristics of each refrigeration temperature for each refrigeration device, determining regulation instructions of the refrigeration devices according to deviation characteristics of each refrigeration temperature, and performing constant-temperature control on the refrigeration devices based on the regulation instructions, wherein the regulation instructions comprise regulation, non-regulation and judgment to be performed, obtaining refrigeration specific coefficients according to the change relation between the refrigeration temperature difference and the refrigeration power and time sequence fluctuation differences between the regulation instructions and the temperature anomaly coefficients corresponding to different refrigeration devices for each refrigeration device to be judged, screening specific refrigeration devices based on the refrigeration specific coefficients, setting the regulation instructions of non-specific refrigeration devices as non-regulation, and re-determining the regulation instructions for each specific refrigeration device according to the refrigeration temperature, the refrigeration temperature difference and the time sequence fluctuation characteristics of the refrigeration power.
9. A thermostatic control device for use in a freezer, said device comprising a memory, a processor and a computer program stored in said memory and executable on said processor, characterized in that the processor, when executing said computer program, implements the steps of the thermostatic control method for use in a freezer according to any one of claims 1-7.

Description

Constant temperature control method, system and equipment applied to refrigeration workshop Technical Field The invention relates to the technical field of control of a freezing workshop, in particular to a constant temperature control method, a constant temperature control system and constant temperature control equipment applied to the freezing workshop. Background The freezing workshop is a place for processing or storing perishable foods, medicines or other sensitive materials at low temperature, the freezing workshop depends on a refrigerating device to keep constant low temperature, but article transportation or workshop personnel access can lead to frequent opening of workshop doors to introduce heat, and machine equipment in the workshop can generate heat when running, when the temperature in the workshop deviates from a set low temperature value for a long time, bacteria and microorganisms can be quickly propagated to influence the quality of products, so that the constant temperature control of the freezing workshop is very important. At present, the constant temperature control of a refrigeration workshop is generally controlled based on a set temperature threshold value, and a plurality of refrigeration devices can be used for cooperatively refrigerating in the refrigeration workshop, when the workshop temperature is higher than the set value, all the refrigeration devices are synchronously started to refrigerate or the refrigeration power is increased, when the workshop temperature is lower than the set value, all the refrigeration devices are synchronously controlled to reduce refrigeration or stop refrigeration, thus the frequent regulation and control of all the refrigeration devices in the refrigeration workshop can be caused to increase energy consumption, even excessive regulation and control can be caused, and the constant temperature control effect of the refrigeration workshop is further poor. Disclosure of Invention In order to solve the technical problem of poor thermostatic control effect on a freezing workshop, the invention aims to provide a thermostatic control method, a thermostatic control system and thermostatic control equipment applied to the freezing workshop, and the adopted technical scheme is as follows: A thermostatic control method applied to a freezer shop, the method comprising: Acquiring the refrigeration power and the refrigeration temperature of each refrigeration device in a refrigeration workshop at each acquisition time and the refrigeration temperature difference of the refrigeration temperature relative to the external environment temperature of the refrigeration workshop in a preset historical period of the time to be regulated; For each refrigerating device, acquiring a temperature anomaly coefficient corresponding to the acquisition time according to the local time sequence fluctuation characteristic of each refrigerating temperature, and determining a regulating instruction of the refrigerating device by combining the deviation characteristic of each refrigerating temperature, wherein the refrigerating device performs constant temperature control based on the regulating instruction, and the regulating instruction comprises regulation, non-regulation and judgment to be performed; The method comprises the steps of obtaining a temperature anomaly coefficient of a refrigerating device according to a temperature anomaly coefficient of the refrigerating device, obtaining a refrigerating specific coefficient of each refrigerating device with a regulating instruction to be researched and judged according to a change relation between the refrigerating temperature difference and the refrigerating power and a time sequence fluctuation difference between the temperature anomaly coefficient corresponding to different refrigerating devices, screening out specific refrigerating devices based on the refrigerating specific coefficient, setting regulating instructions of non-specific refrigerating devices as non-regulating, and re-determining the regulating instructions of each specific refrigerating device according to the refrigerating temperature, the refrigerating temperature difference and the time sequence fluctuation characteristics of the refrigerating power. Further, the method for obtaining the temperature anomaly coefficient comprises the following steps: For each refrigeration temperature, constructing a time analysis window with a preset length, fitting a temperature time sequence of the refrigeration temperature in the time analysis window, and performing STL decomposition on the temperature time sequence to obtain a trend item and a period item; and acquiring a temperature anomaly coefficient of each refrigeration temperature corresponding to the acquisition time according to the change trend of the upper envelope line and the lower envelope line of the period item and the change trend of the trend item. Further, the method for acquiring the regulation instr