Refrigeration constant temperature control system and control method

Abstract

The present invention discloses a refrigeration constant temperature control system and control method, which belongs to the field of constant temperature control technology, including an equipment statistics module, a temperature sensing module, a constant temperature control module, and a compensation adjustment module. The equipment statistics module collects the number of subordinate constant temperature equipment, establishes an equipment database based on MySQL, and establishes a file for each subordinate constant temperature equipment. The file includes the equipment model, equipment type, and number, and records the Unix timestamp of the constant temperature equipment working time in the file. The temperature sensing module includes an NTC thermistor, which is used to sense the internal ambient temperature of the constant temperature equipment and the heating temperature of the refrigeration device and the heating device in the constant temperature equipment, and transmits the resistance value data into the subsequent module. The present invention provides a refrigeration constant temperature control system and control method, which can match the appropriate constant temperature equipment to meet the experimental requirements in combination with the working time and heating temperature of the subordinate equipment and the work intensity of the subsequent tasks.

Description

Technical Field

[0001] The invention belongs to the technical field of constant temperature control, and in particular relates to a refrigeration constant temperature control system and a control method. Background Art

[0002] The refrigeration constant temperature control system is a system used to maintain a specific ambient temperature within a constant range. It is widely used in industrial production, scientific research experiments, medical equipment and other fields. Laboratories are often equipped with multi-state constant temperature equipment to meet the needs of experiments with different work intensities, so that the laboratory can better carry out various scientific research work;

[0003] The Chinese patent with the publication number "CN108268070A" discloses "a thermostatic control system for a thermostatic device, including a temperature sensor, a refrigeration device, a heating device, a control terminal, a processing module, a judgment module and a communication module". Although it can complete the temperature control adjustment of the thermostatic device, in actual use, the thermostatic device often needs to be used continuously. The refrigeration device and the heating device in the thermostatic device are prone to accumulate heat during long-term use, which makes the performance of the refrigeration device and the heating device degrade or malfunction, thereby reducing the working efficiency of the refrigeration device and the heating device. The existing control system cannot select a suitable thermostatic device according to the use time of the thermostatic device under its jurisdiction and the work intensity of the subsequent tasks. It is easy to cause fluctuations in effective cooling capacity and effective heating capacity due to long-term high-intensity use, resulting in the inability to meet the constant temperature situation of subsequent tasks, and there are problems of low practicality and functionality;

[0004] In view of the above, this case proposes a refrigeration constant temperature control system and control method to solve the above technical problems. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a refrigeration constant temperature control system and a control method, which solve the above technical problems by improving the detection method and the processing method.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A refrigeration constant temperature control system, characterized by comprising an equipment statistics module, a temperature sensing module, a constant temperature control module, and a compensation adjustment module;

[0008] The equipment statistics module collects the number of thermostatic devices under its jurisdiction, establishes an equipment database based on MySQL, creates a file for each thermostatic device under its jurisdiction, and records a timestamp;

[0009] The temperature sensing module includes an NTC thermistor, which is used to sense the internal ambient temperature of the thermostatic device and the heating temperature of the refrigeration device and the heating device in the thermostatic device, and transmit the resistance value data to the subsequent module;

[0010] The constant temperature control module includes a CPU processor, which performs temperature conversion on the resistance value of the NTC thermistor inside the constant temperature device based on the resistance value transmitted by the temperature sensing module, and sets a temperature threshold according to the current constant temperature task to determine the converted temperature, and controls the refrigeration device and the heating device to work through the CPU processor according to the determination result;

[0011] The compensation and adjustment module calculates the working time of the current constant temperature device based on the working Unix timestamp of the constant temperature device in the constant temperature device file, and counts the current operating time of all the refrigeration devices and heating devices of the constant temperature devices under its jurisdiction to obtain the current equipment heating temperature. Through the heating temperature, operating time and working status relationship model, based on the task requirements of subsequent constant temperature devices, the current suitable constant temperature device is allocated for use.

[0012] Furthermore, the compensation adjustment module calculates the working time of the current thermostatic device based on the working Unix timestamp of the thermostatic device in the thermostatic device file, obtains the heating temperature of the current device cooling device or heating device through the NTC thermistor, and counts the current working time of all the thermostatic devices cooling devices and heating devices under its jurisdiction based on the task requirements of the subsequent thermostatic device through the heating temperature, running time and working state relationship model, and allocates the current suitable thermostatic device for use. The specific steps are:

[0013] According to the Unix timestamp of the relevant thermostat equipment in the thermostat equipment file, the working time of the current equipment is continuously calculated. The equation converts the NTC thermistor resistance of the current equipment cooling device or heating device into the heating temperature;

[0014] A relationship model between heating temperature, operating time and work efficiency is established. Combined with the refrigeration equipment and heating equipment in the current equipment, a model associating the subsequent working time of the current equipment with the work efficiency is obtained. According to the task requirements of the subsequent constant temperature equipment, the current working time of all the constant temperature equipment refrigeration devices and heating devices under its jurisdiction is counted, and initial equipment allocation is performed for subsequent constant temperature tasks.

[0015] Furthermore, the working time of the current device is continuously calculated based on the Unix timestamp of the relevant thermostat device in the thermostat device file. The equation converts the NTC thermistor resistance of the current equipment cooling device or heating device into the heating temperature, including the following steps:

[0016] Get the timestamp when the device is started from the thermostat device file, and use the current real-time timestamp to calculate the current thermostat device working time. The algorithm formula is:

[0017] ;in, Represents the working time of the current constant temperature equipment. Represents the real-time timestamp and the startup timestamp respectively. The NTC thermistor resistance of the current equipment cooling device or heating device is read through the analog-to-digital converter. Equation to obtain real-time device heating temperature .

[0018] Furthermore, the relationship model between heating temperature, operating time and working efficiency is established, and the subsequent working time and working efficiency association model of the current equipment is obtained by combining the refrigeration equipment and heating equipment in the current equipment. According to the task requirements of the subsequent constant temperature equipment, the current working time of all the constant temperature equipment refrigeration devices and heating devices under the jurisdiction is counted, and the equipment is initially allocated for the subsequent constant temperature task. The specific steps are as follows:

[0019] Collect historical data of the same temperature control equipment, including heating temperature, operating time, and work efficiency, and establish a quadratic polynomial regression relationship model based on historical data. The algorithm formula is:

[0020] ;in, Represents work efficiency, T

[0021] represents the current device heating temperature, t represents the current device running time, The representative coefficient is obtained by conducting a control variable experiment on the current temperature control equipment, recording the working efficiency of the equipment at different heating temperatures and operating times, and calculating the coefficient based on the least squares method;

[0022] Collect the power consumption data per unit time of the same constant temperature task in history, determine the work intensity of the constant temperature task based on the power consumption data per unit time, and obtain the prediction equation of working time and heating temperature based on different work intensities. The specific steps are as follows:

[0023] ; Among them, G represents the workload of the relevant task, and E represents the power consumption. Represents unit time, based on work intensity threshold , classify the workload of the current task, the steps are:

[0024] when When , it means the workload of the current task is low;

[0025] when When , it means the workload of the current task is medium;

[0026] when When , it means the workload of the current task is high;

[0027] A relationship model between heating temperature and working time under different working intensities is established, and its algorithm formula is:

[0028] ;in, represents the relationship coefficient, collects the heating temperature and working time under different working intensities, and solves the relationship coefficients under different working intensities respectively;

[0029] Based on the above formula, the working time data set is established by counting the working time of all the constant temperature equipment under its jurisdiction: , collect the heating temperatures of all the thermostatic devices currently under your jurisdiction and establish a heating temperature data set: , based on the working time data set and the heating temperature data set, the working efficiency data set of the current subordinate equipment is calculated: ;

[0030] Will The work efficiency data in the work efficiency threshold is divided into 55% < ≤100% of the temperature control equipment files are marked in orange, and 70%< ≤100% of the temperature control equipment files are marked in orange + blue, and 85%< The temperature control equipment files of ≤100% are marked as orange + blue + white. The temperature control equipment under its jurisdiction is preliminarily matched according to the work intensity of the current task. The orange file is matched with low work intensity, the orange + blue file is matched with medium work intensity, and the orange + blue + white file is matched with high work intensity.

[0031] Furthermore, the compensation adjustment module also includes a precise matching system, which further matches the current temperature control device based on the working time under different working intensities, and the specific steps are as follows:

[0032] Based on the work intensity and working time of the current task, the task loss efficiency is calculated. The algorithm formula is:

[0033] ;

[0034] ;

[0035] in, represents the loss efficiency, Represents the working time of the current task, Represents the final working efficiency of the constant temperature equipment, Representatives select the current working efficiency of the constant temperature equipment, represents the screening threshold, that is, the minimum value of the equipment archive work efficiency ratio division under the current task work intensity. When, keep The equipment file is used as an alternative file for the constant temperature equipment of the current task.

[0036] Furthermore, the equipment statistics module collects the number of subordinate constant temperature equipment, establishes an equipment database based on MySQL, and creates a file for each subordinate constant temperature equipment. The file includes the equipment model, equipment type, and number. At the same time, the Unix timestamp of the constant temperature equipment working time is recorded in the file. At the same time, according to the judgment result of the compensation adjustment module, the constant temperature equipment file is color-coded, and the number is highlighted according to the screening result of the subsequent constant temperature task.

[0037] Furthermore, the constant temperature control module includes a CPU processor, which performs temperature conversion on the resistance value based on the resistance value of the NTC thermistor inside the constant temperature device transmitted by the temperature sensing module, and sets a temperature threshold according to the current constant temperature task to determine the converted temperature, and controls the refrigeration device and the heating device to work through the CPU processor according to the determination result, and the specific steps are:

[0038] Based on the temperature sensing module, the resistance value of the NTC thermistor in the current constant temperature device internal environment is received, and according to the temperature requirements of the current constant temperature device working task, the The equation converts resistance into temperature;

[0039] Based on the working temperature threshold of the current constant temperature task and , adjust the internal ambient temperature of the current constant temperature equipment, the steps are:

[0040] When the internal ambient temperature of the thermostat When the temperature is high, the CPU transmits the working instructions to the refrigeration device inside the constant temperature equipment, providing the refrigeration device with operating power for cooling;

[0041] When the internal ambient temperature of the thermostat When the temperature is high, the CPU transmits the working instruction to the heating device inside the constant temperature equipment to increase the operating power of the heating device for heating;

[0042] When the internal ambient temperature of the thermostat When the working power of the cooling device or heating device is maintained, the CPU transmits the working instruction to the cooling device or heating device inside the constant temperature device.

[0043] A refrigeration constant temperature control method comprises the following steps:

[0044] S1. Collect the number of thermostatic devices under the jurisdiction, establish a device database based on MySQL, and create a separate file for each thermostatic device under the jurisdiction. Each thermostatic device file includes the device model, device type, number and real-time working time;

[0045] S2, using an NTC thermistor to sense the internal ambient temperature of the thermostatic device, obtaining a temperature threshold based on the temperature range set for the current thermostatic task, determining the internal ambient temperature of the thermostatic device, and maintaining the internal temperature of the thermostatic device through a refrigeration device and a heating device based on the determination result;

[0046] S3, collecting the heating temperature of the refrigeration device and the heating device inside the thermostatic device, and calculating the working efficiency of the thermostatic device in combination with the real-time working time of the current device, and using the relationship model between the heating temperature, the operating time and the working state, and based on the task requirements of the subsequent thermostatic device, allocating the current suitable thermostatic device for use;

[0047] S4. Combined with the workload of subsequent tasks, conduct secondary screening on the thermostatic equipment initially screened for subsequent thermostatic tasks, and select appropriate thermostatic equipment from the subordinate thermostatic equipment as the best matching equipment for subsequent tasks.

[0048] Compared with the prior art, the present invention has the following beneficial effects:

[0049] In the present invention, by setting up a compensation adjustment module, the working hours and heating temperatures of all the thermostatic devices under its jurisdiction are collected, the actual working efficiency of different devices is calculated, and at the same time, based on the work intensity of subsequent tasks, the actual working efficiency of existing devices is grouped, so that different work intensity tasks are matched with thermostatic devices of different actual working efficiencies, which can ensure that tasks of different work intensities can be matched with the most suitable thermostatic devices, thereby enhancing practicality;

[0050] In the present invention, by combining the work intensity and working time of subsequent tasks, the thermostat that meets the experimental conditions is further matched based on the pre-grouped thermostats, so that the thermostat that best meets the needs of a specific experimental task can be matched, ensuring that the temperature during the experiment is always kept within a precise range, improving the accuracy and reliability of the experimental results, and reducing temperature fluctuations. Whether in a long-term continuous experiment or in the case of changes in work intensity, the specific ambient temperature can be stably maintained within a constant range, providing a stable temperature environment for the experiment, and avoiding adverse effects on the experimental results due to temperature fluctuations;

[0051] In the present invention, by comprehensively considering the work intensity and working time to match the constant temperature equipment, the advantages of each equipment can be fully utilized to avoid resource waste. For some short-time, low-intensity experimental tasks, moderate-performance but more energy-saving equipment can be selected, while for long-time, high-intensity experimental tasks, equipment with stronger performance and higher stability is allocated. According to different experimental requirements, equipment resources are reasonably allocated, the overall utilization rate of the equipment is improved, and the functionality is enhanced;

[0052] In the present invention, by color-coding the constant temperature equipment files, the experimenters can better plan the experimental arrangements. When designing the experiment, they can consider the temperature control requirements in advance and select the most suitable experimental time and equipment, making the experimental process more orderly and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 The figure is a block diagram of a refrigeration constant temperature control system of the present invention. DETAILED DESCRIPTION

[0054] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0055] Example 1: Figure 1 As shown, a refrigeration constant temperature control system includes an equipment statistics module, a temperature sensing module, a constant temperature control module, and a compensation adjustment module;

[0056] The equipment statistics module collects the number of thermostatic devices under its jurisdiction, establishes an equipment database based on MySQL, and creates a file for each thermostatic device under its jurisdiction. The file includes the device model, device type, and number. At the same time, the Unix timestamp of the thermostatic device working time is recorded in the file. At the same time, according to the judgment result of the compensation adjustment module, the thermostatic device file is color-coded, and the number is highlighted according to the screening result of the subsequent thermostatic task;

[0057] The temperature sensing module includes an NTC thermistor, which is used to sense the internal ambient temperature of the thermostatic device and the heating temperature of the refrigeration device and the heating device in the thermostatic device, and transmit the resistance value data to the subsequent module;

[0058] The constant temperature control module includes a CPU processor, which converts the resistance value of the NTC thermistor inside the constant temperature device transmitted by the temperature sensing module to a temperature, and sets a temperature threshold according to the current constant temperature task to determine the converted temperature. The CPU processor controls the refrigeration device and the heating device to work according to the determination result. The specific steps are as follows:

[0059] Based on the temperature sensing module, the resistance value of the NTC thermistor in the current constant temperature device internal environment is received, and according to the temperature requirements of the current constant temperature device working task, the The equation converts resistance into temperature;

[0060] Based on the working temperature threshold of the current constant temperature task and , adjust the internal ambient temperature of the current constant temperature equipment, the steps are:

[0061] When the internal ambient temperature of the thermostat When the temperature is high, the CPU transmits the working instructions to the refrigeration device inside the constant temperature equipment, providing the refrigeration device with operating power for cooling;

[0062] When the internal ambient temperature of the thermostat When the temperature is high, the CPU transmits the working instruction to the heating device inside the constant temperature equipment to increase the operating power of the heating device for heating;

[0063] When the internal ambient temperature of the thermostat When the working power of the cooling device or heating device is maintained, the CPU transmits the working instruction to the cooling device or heating device inside the constant temperature device.

[0064] It should be noted that the cooling device in the constant temperature device includes a semiconductor cooling plate, and the heating device includes an electric heater. The NTC thermistor can reduce the resistance when the temperature rises, thereby combining The equation converts the resistance value into a temperature value, and determines the current internal ambient temperature of the constant temperature device based on the constant temperature range set for different tasks, and controls the operation of the refrigeration and heating devices through the CPU processor.

[0065] The compensation adjustment module calculates the working time of the current thermostat based on the working Unix timestamp of the thermostat in the thermostat file, and counts the current operating time of all the thermostat cooling and heating devices under it to obtain the current equipment heating temperature. Through the relationship model between heating temperature, operating time and working status, based on the task requirements of the subsequent thermostat, the current appropriate thermostat is allocated for use. The specific steps are as follows:

[0066] According to the Unix timestamp of the relevant thermostat equipment in the thermostat equipment file, the working time of the current equipment is continuously calculated. The equation converts the NTC thermistor resistance of the current equipment cooling device or heating device into the heating temperature, including the following steps:

[0067] Get the timestamp when the device is started from the thermostat device file, and use the current real-time timestamp to calculate the current thermostat device working time. The algorithm formula is:

[0068] ;in, Represents the working time of the current constant temperature equipment. Represents the real-time timestamp and the startup timestamp respectively. The NTC thermistor resistance of the current equipment cooling device or heating device is read through the analog-to-digital converter. Equation to obtain real-time device heating temperature .

[0069] It should be noted that through The equation converts resistance into temperature, and the specific algorithm formula is:

[0070] ; Where T is the current internal ambient temperature of the constant temperature device, is the current resistance of the selected thermistor. A, B, and C represent constants related to the material characteristics of the NTC thermistor, which can be obtained through calibration. That is, multiple precise temperature points are selected through experiments, and the specific values ​​of A, B, and C are determined by solving the equations in combination with the NTC resistor values ​​at those temperature points.

[0071] Establish a relationship model between heating temperature, operating time and work efficiency, combine the refrigeration equipment and heating equipment in the current equipment, obtain the subsequent working time and work efficiency association model of the current equipment, and according to the task requirements of the subsequent constant temperature equipment, count the current working time of all the constant temperature equipment refrigeration devices and heating devices under their jurisdiction, and make initial equipment allocation for the subsequent constant temperature tasks. The specific steps are as follows:

[0072] Collect historical data of the same temperature control equipment, including heating temperature, operating time, and work efficiency, and establish a quadratic polynomial regression relationship model based on historical data. The algorithm formula is:

[0073] ;in, Represents work efficiency, T

[0074] represents the current device heating temperature, t represents the current device running time, The representative coefficient is obtained by conducting a control variable experiment on the current temperature control equipment, recording the working efficiency of the equipment at different heating temperatures and operating times, and calculating the coefficient based on the least squares method;

[0075] Collect the power consumption data per unit time of the same constant temperature task in history, determine the work intensity of the constant temperature task based on the power consumption data per unit time, and obtain the prediction equation of working time and heating temperature based on different work intensities. The specific steps are as follows:

[0076] ; Among them, G represents the workload of the relevant task, and E represents the power consumption. Represents unit time, based on work intensity threshold , classify the workload of the current task, the steps are:

[0077] when When , it means the workload of the current task is low;

[0078] when When , it means the workload of the current task is medium;

[0079] when When , it means the workload of the current task is high;

[0080] It should be noted that Represents unit time, usually set to 1 hour, They represent the low threshold and high threshold of work intensity respectively. They can be set by collecting historical work intensity data of different tasks, calculating the standard deviation and variance, and combining them with the Laida criterion.

[0081] A relationship model between heating temperature and working time under different working intensities is established, and its algorithm formula is:

[0082] ;in, represents the relationship coefficient, collects the heating temperature and working time under different working intensities, and solves the relationship coefficients under different working intensities respectively;

[0083] Based on the above formula, the working time data set is established by counting the working time of all the constant temperature equipment under its jurisdiction: , collect the heating temperatures of all the thermostatic devices currently under your jurisdiction and establish a heating temperature data set: , based on the working time data set and the heating temperature data set, the working efficiency data set of the current subordinate equipment is calculated: ;

[0084] Will The work efficiency data in the work efficiency threshold is divided into 55% < ≤100% of the temperature control equipment files are marked in orange, and 70%< ≤100% of the temperature control equipment files are marked in orange + blue, and 85%< The temperature control equipment files of ≤100% are marked as orange + blue + white. The temperature control equipment under its jurisdiction is preliminarily matched according to the work intensity of the current task. The orange file is matched with low work intensity, the orange + blue file is matched with medium work intensity, and the orange + blue + white file is matched with high work intensity.

[0085] It should be noted that by dividing the work efficiency data and matching it with the task intensity, it is possible to more accurately select suitable temperature control equipment for different work tasks. For example, for tasks with low work intensity, selecting orange archive equipment with a work efficiency of 55% or above can not only meet task requirements, but also avoid excessive use of high-performance equipment, thereby improving the rationality of equipment use. For tasks with high work intensity, matching orange + blue + white archive equipment with a work efficiency of 85% or above can ensure that the equipment can still operate stably under high-load working conditions, thereby ensuring the smooth completion of the task.

[0086] Embodiment 2: The compensation adjustment module also includes a precise matching system, which further matches the current temperature control device based on the working time under different working intensities. The specific steps are as follows:

[0087] Based on the work intensity and working time of the current task, the task loss efficiency is calculated. The algorithm formula is:

[0088] ;

[0089] ;

[0090] in, represents the loss efficiency, Represents the working time of the current task, Represents the final working efficiency of the constant temperature equipment, Representatives select the current working efficiency of the constant temperature equipment, represents the screening threshold, that is, the minimum value of the equipment archive work efficiency ratio division under the current task work intensity. When, keep The equipment file is used as an alternative file for the constant temperature equipment of the current task.

[0091] It should be noted that the formula In , it is necessary to make a selection based on the work intensity of the current task to ensure that the heating temperature is calculated correctly. With the increase of working time and heat, the output power of the electrical components inside the refrigeration equipment and heating equipment will be unstable, causing the performance of the refrigeration equipment and heating equipment to decline or malfunction, thereby reducing the working efficiency of the refrigeration equipment and heating equipment, causing fluctuations in the effective cooling capacity and effective heating capacity, resulting in the inability to meet the constant temperature situation of subsequent tasks. By simulating the performance changes of the equipment and taking corresponding measures to ensure that the selected equipment can still effectively complete the subsequent constant temperature tasks after working for a long time.

[0092] A refrigeration constant temperature control method comprises the following steps:

[0093] S1. Collect the number of thermostatic devices under the jurisdiction, establish a device database based on MySQL, and create a separate file for each thermostatic device under the jurisdiction. Each thermostatic device file includes the device model, device type, number and real-time working time;

[0094] S2, using an NTC thermistor to sense the internal ambient temperature of the thermostatic device, obtaining a temperature threshold based on the temperature range set for the current thermostatic task, determining the internal ambient temperature of the thermostatic device, and maintaining the internal temperature of the thermostatic device through a refrigeration device and a heating device based on the determination result;

[0095] S3, collecting the heating temperature of the refrigeration device and the heating device inside the thermostatic device, and calculating the working efficiency of the thermostatic device in combination with the real-time working time of the current device, and using the relationship model between the heating temperature, the operating time and the working state, and based on the task requirements of the subsequent thermostatic device, allocating the current suitable thermostatic device for use;

[0096] S4. Combined with the workload of subsequent tasks, conduct secondary screening on the thermostatic equipment initially screened for subsequent thermostatic tasks, and select appropriate thermostatic equipment from the subordinate thermostatic equipment as the best matching equipment for subsequent tasks.

[0097] In the embodiments provided by the present invention, it should be understood that the disclosed devices, apparatuses and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the modules is only a logical function division, and there may be other division methods in actual implementation; the modules described as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the method of this embodiment.

[0098] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A refrigeration constant temperature control system, characterized in that: Including equipment statistics module, temperature sensing module, constant temperature control module, compensation adjustment module; The equipment statistics module collects the number of thermostatic devices under its jurisdiction, establishes an equipment database based on MySQL, creates a file for each thermostatic device under its jurisdiction, and records a timestamp; The temperature sensing module includes an NTC thermistor, which is used to sense the internal ambient temperature of the thermostatic device and the heating temperature of the refrigeration device and the heating device in the thermostatic device, and transmit the resistance value data to the subsequent module; The constant temperature control module includes a CPU processor, which performs temperature conversion on the resistance value of the NTC thermistor inside the constant temperature device based on the resistance value transmitted by the temperature sensing module, and sets a temperature threshold according to the current constant temperature task to determine the converted temperature, and controls the refrigeration device and the heating device to work through the CPU processor according to the determination result; The compensation adjustment module calculates the working time of the current thermostatic device based on the working Unix timestamp of the thermostatic device in the thermostatic device file, and counts the current operating time of all the thermostatic devices and heating devices under it to obtain the current device heating temperature. Through the heating temperature, operating time and working state relationship model, based on the task requirements of the subsequent thermostatic device, the current suitable thermostatic device is allocated for use. The specific steps are as follows: According to the Unix timestamp of the relevant thermostat device in the thermostat device file, the working time of the current device is continuously calculated, and the NTC thermistor resistance of the current device's cooling device or heating device is converted into the heating temperature based on the Steinhart-Hart equation, including the following steps: Get the timestamp when the device is started from the thermostat device file, and use the current real-time timestamp to calculate the current thermostat device working time. The algorithm formula is: ; in, Represents the working time of the current constant temperature equipment. Represent the real-time timestamp and the startup timestamp respectively. The NTC thermistor resistance of the current equipment cooling device or heating device is read through the analog-to-digital converter, and the real-time device heating temperature is obtained through the Steinhart-Hart equation ; Establish a relationship model between heating temperature, operating time and work efficiency, combine the refrigeration equipment and heating equipment in the current equipment, obtain the subsequent working time and work efficiency association model of the current equipment, and according to the task requirements of the subsequent constant temperature equipment, count the current working time of all the constant temperature equipment refrigeration devices and heating devices under their jurisdiction, and make initial equipment allocation for the subsequent constant temperature tasks. The specific steps are as follows: Collect historical data of the same temperature control equipment, including heating temperature, operating time, and work efficiency, and establish a quadratic polynomial regression relationship model based on historical data. The algorithm formula is: ; in, represents working efficiency, T represents the current heating temperature of the equipment, t represents the current running time of the equipment, and a, b, c, d, e, and f represent coefficients. By conducting a control variable experiment on the current temperature control equipment, the working efficiency of the equipment is recorded at different heating temperatures and running times, and the coefficients are calculated based on the least squares method; Collect the power consumption data per unit time of the same constant temperature task in history, determine the work intensity of the constant temperature task based on the power consumption data per unit time, and obtain the prediction equation of working time and heating temperature based on different work intensities. The specific steps are as follows: ; Among them, G represents the workload of the relevant task, E represents the power consumption, Represents unit time, based on work intensity threshold , classify the workload of the current task, the steps are: when When , it means the workload of the current task is low; when When , it means the workload of the current task is medium; when When , it means the workload of the current task is high; A relationship model between heating temperature and working time under different working intensities is established, and its algorithm formula is: ; in, represents the relationship coefficient, collects the heating temperature and working time under different working intensities, and solves the relationship coefficients under different working intensities respectively; Based on the above formula, the working time data set is established by counting the working time of all the constant temperature equipment under its jurisdiction: , collect the heating temperatures of all the thermostatic devices currently under your jurisdiction and establish a heating temperature data set: , based on the working time data set and the heating temperature data set, the working efficiency data set of the current subordinate equipment is calculated: ; Will The work efficiency data in the work efficiency threshold is divided into 55% < ≤100% of the temperature control equipment files are marked in orange, and 70%< ≤100% of the temperature control equipment files are marked in orange + blue, and 85%< ≤100% of the temperature control equipment files are marked as orange + blue + white. The temperature control equipment under the jurisdiction is preliminarily matched according to the current task work intensity. The low work intensity matches the orange file, the medium work intensity matches the orange + blue file, and the high work intensity matches the orange + blue + white file; The compensation adjustment module also includes a precise matching system, which further matches the current temperature control device based on the working time under different working intensities. The specific steps are as follows: Based on the work intensity and working time of the current task, the task loss efficiency is calculated. The algorithm formula is: ; ； in, represents the loss efficiency, Represents the working time of the current task, Represents the final working efficiency of the constant temperature equipment, Representatives select the current working efficiency of the constant temperature equipment, represents the screening threshold, that is, the minimum value of the equipment archive work efficiency ratio division under the current task work intensity. When, keep The equipment file is used as an alternative file for the constant temperature equipment of the current task.

2. A refrigeration constant temperature control system according to claim 1, characterized in that: The equipment statistics module collects the number of subordinate constant temperature equipment, establishes an equipment database based on MySQL, and creates a file for each subordinate constant temperature equipment. The file includes the equipment model, equipment type, and number. At the same time, the Unix timestamp of the constant temperature equipment working time is recorded in the file. At the same time, according to the judgment result of the compensation adjustment module, the constant temperature equipment file is color-coded, and the number is highlighted according to the screening result of the subsequent constant temperature task.

3. A refrigeration constant temperature control system according to claim 1, characterized in that: The constant temperature control module includes a CPU processor, which performs temperature conversion on the resistance value of the NTC thermistor inside the constant temperature device transmitted by the temperature sensing module, and sets a temperature threshold according to the current constant temperature task to determine the converted temperature, and controls the refrigeration device and the heating device to work through the CPU processor according to the determination result, and the specific steps are as follows: Based on the temperature sensing module, the resistance value of the NTC thermistor in the current constant temperature device internal environment is received, and according to the temperature requirement of the current constant temperature device working task, the resistance value is converted into a temperature value through the Steinhart-Hart equation; Based on the working temperature threshold of the current constant temperature task and , adjust the internal ambient temperature of the current constant temperature equipment, the steps are: When the internal ambient temperature of the thermostat When the temperature is high, the CPU transmits the working instructions to the refrigeration device inside the constant temperature equipment, providing the refrigeration device with operating power for cooling; When the internal ambient temperature of the thermostat When the temperature is high, the CPU transmits the working instruction to the heating device inside the constant temperature equipment to increase the operating power of the heating device for heating; When the internal ambient temperature of the thermostat When the working power of the cooling device or heating device is maintained, the CPU transmits the working instruction to the cooling device or heating device inside the constant temperature device.

4. A refrigeration constant temperature control method, characterized in that: The method adopts the refrigeration constant temperature control system according to any one of claims 1 to 3, comprising the following steps: S1. Collect the number of thermostatic devices under the jurisdiction, establish a device database based on MySQL, and create a separate file for each thermostatic device under the jurisdiction. Each thermostatic device file includes the device model, device type, number and real-time working time; S2, using an NTC thermistor to sense the internal ambient temperature of the thermostatic device, obtaining a temperature threshold based on the temperature range set for the current thermostatic task, determining the internal ambient temperature of the thermostatic device, and maintaining the internal temperature of the thermostatic device through a refrigeration device and a heating device based on the determination result; S3, collecting the heating temperature of the refrigeration device and the heating device inside the thermostatic device, and calculating the working efficiency of the thermostatic device in combination with the real-time working time of the current device, and using the relationship model between the heating temperature, the operating time and the working state, and based on the task requirements of the subsequent thermostatic device, allocating the current suitable thermostatic device for use; S4. Combined with the workload of subsequent tasks, conduct secondary screening on the thermostatic equipment initially screened for subsequent thermostatic tasks, and select appropriate thermostatic equipment from the subordinate thermostatic equipment as the best matching equipment for subsequent tasks.

Images