A refrigeration and constant temperature equipment for material experiments with safety protection function

Abstract

The invention discloses a refrigeration and thermostatic equipment with a safety protection function for use in material experiments, and relates to the technical field of refrigeration and thermostatic equipment, including refrigeration and thermostatic equipment and a safety protection system; the refrigeration and thermostatic equipment includes a control component, a heating component, a refrigeration component, a box protection component, and a safety protection component; the control component includes a master controller and a sensor for controlling parameters in the refrigeration and thermostatic equipment; the heating component includes an electric heater for providing heat; the refrigeration component includes a compressor, a condenser, an expansion valve and an evaporator for lowering the temperature; further judgment can be made based on the results of real-time monitoring, and whether the refrigeration and thermostatic equipment needs safety protection can be evaluated at the first time, which can not only reduce the occurrence of misjudgment, but also reduce the losses caused by failures of the refrigeration and thermostatic equipment; the current severity of the refrigeration and thermostatic equipment can be determined based on a systematic evaluation.

Description

Technical Field

[0001] The invention relates to the technical field of refrigeration and constant temperature, and more specifically to a refrigeration and constant temperature device used in material experiments with a safety protection function. Background Art

[0002] In material experiments, refrigeration and thermostatic equipment is used to simulate different temperature environments to test the performance of materials at different temperatures. For automotive and aviation parts, the products of these industries need to withstand extreme climatic conditions. Refrigeration and thermostatic equipment is needed to simulate extreme climatic conditions in the experimental refrigeration and thermostatic equipment to test the weather resistance, sealing and aging of the parts. Since the refrigeration and thermostatic equipment simulates extreme climatic conditions, such as high temperature and high pressure, low temperature and low pressure, there may be some potential safety hazards during the experiment, so safety protection is required during the experiment;

[0003] However, in actual use, since the materials of automobile or aviation components need to withstand extreme climatic conditions during testing, if during the test process, high temperature and high pressure or low temperature and low pressure conditions occur, there will be certain risks in the use of refrigeration and constant temperature equipment. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a refrigeration and constant temperature device for material experiments with a safety protection function, including a refrigeration and constant temperature device and a safety protection system;

[0005] The refrigeration and constant temperature equipment includes a control component, a heating component, a refrigeration component, a box protection component, and a safety protection component;

[0006] The control assembly includes a master controller and sensors for controlling parameters within the refrigeration thermostatic device;

[0007] The heating assembly includes an electric heater for providing heat;

[0008] The refrigeration assembly includes a compressor, a condenser, an expansion valve and an evaporator, which are used to reduce the temperature;

[0009] The control component is electrically connected to the heating component, the refrigeration component and the safety protection component, and the control component, the heating component, the refrigeration component and the safety protection component are all located inside the box protection component;

[0010] The box protection component is located on the outer layer of the refrigeration constant temperature device, and the box protection component is composed of a cold-rolled steel plate;

[0011] The safety protection component is used to provide safety protection and deal with potential safety hazards when an abnormality occurs in the refrigeration and constant temperature equipment.

[0012] Preferably, the box protection assembly also includes an insulation layer, which is made of a hard polyurethane foam material and is used to reduce heat loss and maintain a stable internal temperature of the refrigeration constant temperature equipment.

[0013] Preferably, the safety protection component includes a safety protection device and a safety protection system;

[0014] The safety protection device includes an emergency stop button, an access control safety lock, a grounding protection and a fire protection device;

[0015] The emergency stop button is used to quickly cut off the power supply;

[0016] The access control safety lock is used to prevent unauthorized persons from accessing;

[0017] The grounding protection is used to ensure the grounding of the refrigeration thermostatic equipment to prevent electrical failures;

[0018] The fire-fighting device is used to extinguish open fire;

[0019] The emergency stop button, access control safety lock, grounding protection and fire protection device are installed inside the box protection device in sequence;

[0020] The safety protection system is used to monitor the refrigeration and thermostatic equipment in real time, and control the safety protection device to protect the refrigeration and thermostatic equipment according to the monitoring results.

[0021] Preferably, the safety protection system includes a data acquisition module, a central control module, a fault response module and a fault self-check module;

[0022] The data acquisition module is used to collect operating parameter information and environmental information of the refrigeration constant temperature equipment;

[0023] The central control module is used to receive the information from the data acquisition module and perform comprehensive analysis; the central control module includes a comprehensive calculation unit and a safety judgment unit, and the comprehensive calculation unit is used to predict whether there is a potential risk in the refrigeration constant temperature equipment in the current time period based on the information from the data acquisition module:

[0024] Get the temperature change rate R of the current time period over time;

[0025] Get the humidity change rate Q of the humidity in the current time period over time;

[0026] Obtain the pressure change rate W of the current time period over time;

[0027] According to the formula , obtain the temperature and pressure stability value E of the current time period, where and is the preset proportional coefficient;

[0028] According to the formula , obtain the over-temperature and over-pressure risk assessment value T of the current time period, where and is the preset scaling factor, is the preset temperature value, The temperature value of the refrigeration constant temperature equipment in the current time period. is the preset pressure value, The pressure value of the refrigeration thermostatic equipment in the current time period;

[0029] According to the formula , calculate and obtain the comprehensive safety score of the refrigeration constant temperature equipment ,in , , , and is the preset proportional coefficient;

[0030] A threshold value of the comprehensive safety score is set in advance. If the comprehensive safety score value Y is greater than the threshold value of the comprehensive safety score value, a signal is generated and transmitted to the safety judgment unit. If the comprehensive safety score value Y is less than or equal to the threshold value of the comprehensive safety score value, it is judged that the refrigeration thermostatic device maintains normal operation;

[0031] The safety judgment unit is used to perform a logical judgment based on the result of the comprehensive calculation unit to determine whether safety protection is required, and transmit the judgment result to the fault response module;

[0032] The fault response module is used to formulate a response strategy according to the judgment result of the safety judgment unit, and transmit the response strategy to the control component;

[0033] The fault self-diagnosis module is used to automatically monitor whether there is a fault in the safety protection system and provide a corresponding optimization strategy.

[0034] Preferably, the specific working mode of the safety judgment unit is as follows:

[0035] According to the formula , obtain the risk assessment value P of the refrigeration constant temperature equipment, where n is the number of influencing factors, is the deviation rate of the i-th influencing factor, is the preset weight value of the i-th influencing factor;

[0036] A threshold of the risk assessment value is set in advance. If the risk assessment value P is greater than the threshold of the risk assessment value, an alarm signal is generated and transmitted to the fault response module.

[0037] Preferably, the The specific way to obtain is as follows:

[0038] The corresponding thresholds of the temperature change rate R, humidity change rate Q, pressure change rate W, temperature and pressure stability value E and over-temperature and over-pressure risk assessment value T are set in advance, and the corresponding marks are , , , and ;

[0039] .

[0040] Preferably, the specific working mode of the fault response module is as follows:

[0041] Set a threshold range of risk assessment values ​​in advance;

[0042] Compare the risk assessment value with the threshold range of the risk assessment value. If the risk assessment value P is less than the threshold range of the risk assessment value, mark the risk as low risk. If the risk assessment value P is within the threshold range of the risk assessment value, mark it as medium risk. If the risk assessment value P is greater than the threshold range of the risk assessment value, mark it as high risk.

[0043] The fault response module also includes a policy formulation unit, which is used to formulate a security protection policy according to the assessed risk type.

[0044] Preferably, the specific working method of the strategy formulation unit is as follows:

[0045] If the risk is low, a warning message will be sent to the operator and the data at the current time point will be recorded;

[0046] If the risk is medium, the parameters will be adjusted to the preset safety range, limiting some functions of the system;

[0047] If the risk is high, the emergency stop button is triggered to quickly cut off the power supply.

[0048] Preferably, the specific working mode of the fault self-diagnosis module is as follows:

[0049] Obtain the historical fault frequency value H of the safety protection system;

[0050] Obtain the performance degradation trend value K of the safety protection system;

[0051] According to the formula , calculate and obtain the failure risk value L of the safety protection system;

[0052] A threshold of a fault risk value is set in advance. If the fault risk value L is greater than the threshold of the fixed risk value, it is judged that the safety protection system needs to be optimized. If not, it is judged that the safety protection system is operating normally.

[0053] The fault self-diagnosis module further includes a feedback unit, which is used to optimize and feedback-adjust the judgment threshold of the safety protection system according to the diagnosis result.

[0054] Preferably, the specific working mode of the feedback unit is as follows, specifically:

[0055] According to the formula , calculate and obtain the adjustment value of the judgment threshold of the safety protection system ; Adjust the judgment threshold value Transmitted to the central control module for adjustment.

[0056] Beneficial effects: By making further judgments based on the results of real-time monitoring, it is possible to evaluate at the first time whether the refrigeration thermostatic equipment needs safety protection, which can not only reduce the occurrence of misjudgments, but also reduce the losses caused by failures of the refrigeration thermostatic equipment; by determining the current severity of the refrigeration thermostatic equipment based on a systematic evaluation, it is determined whether safety protection is needed; when the safety protection system has problems such as aging, the judgment threshold is adjusted accordingly, and the safety protection system can be maintained in normal use for a short period of time when the refrigeration thermostatic equipment is running, thereby reducing the losses caused. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 It is a control flow diagram of the refrigeration constant temperature equipment of the present invention. DETAILED DESCRIPTION

[0058] like Figure 1 As shown: a refrigeration and thermostatic equipment used in material experiments with a safety protection function, including a refrigeration and thermostatic equipment and a safety protection system; it should be noted that in material experiments, the refrigeration and thermostatic equipment is used to simulate different temperature environments to test the performance of materials at different temperatures. Among them, for automobile and aviation parts, the products of these industries need to withstand extreme climatic conditions, and the refrigeration and thermostatic equipment is needed to simulate extreme climatic conditions in the experimental refrigeration and thermostatic equipment to test the weather resistance, sealing and aging of the parts. Since the refrigeration and thermostatic equipment simulates extreme climatic conditions, such as high temperature and high pressure, low temperature and low pressure, there may be some potential safety hazards during the experiment, so safety protection is required during the experiment;

[0059] The refrigeration and constant temperature equipment includes a control component, a heating component, a refrigeration component, a box protection component, and a safety protection component;

[0060] The control assembly includes a master controller and sensors for controlling parameters within the refrigeration thermostatic device;

[0061] The heating assembly includes an electric heater for providing heat;

[0062] The refrigeration assembly includes a compressor, a condenser, an expansion valve and an evaporator, which are used to reduce the temperature;

[0063] The control component is electrically connected to the heating component, the refrigeration component and the safety protection component, and the control component, the heating component, the refrigeration component and the safety protection component are all located inside the box protection component;

[0064] The box protection component is located on the outer layer of the refrigeration constant temperature device, and the box protection component is composed of a cold-rolled steel plate;

[0065] The safety protection component is used to provide safety protection and deal with potential safety hazards when an abnormality occurs in the refrigeration and constant temperature equipment.

[0066] As an optional embodiment: It should be noted that during the experiment, in order to maintain the stability of the data, the sample needs to be in a constant temperature environment to keep the internal temperature stable. This technical solution can reduce the temperature loss of the sample environment by adding an insulation layer, and cooperate with subsequent temperature adjustments to make the sample data tend to be stable;

[0067] The box protection component also includes an insulation layer, which is made of hard polyurethane foam material and is used to reduce heat loss and maintain a stable internal temperature of the refrigeration constant temperature equipment.

[0068] As an optional embodiment: the safety protection component includes a safety protection device and a safety protection system; it should be noted that in the actual use of the refrigeration constant temperature equipment, there may be some potential safety hazards, so safety protection is required during the experiment. This technical solution protects the equipment by adding a safety protection component;

[0069] The safety protection device includes an emergency stop button, an access control safety lock, a grounding protection and a fire protection device;

[0070] The emergency stop button is used to quickly cut off the power supply;

[0071] The access control safety lock is used to prevent unauthorized persons from accessing;

[0072] The grounding protection is used to ensure the grounding of the refrigeration thermostatic equipment to prevent electrical failures;

[0073] The fire-fighting device is used to extinguish open fire;

[0074] The emergency stop button, access control safety lock, grounding protection and fire protection device are installed inside the box protection device in sequence;

[0075] The safety protection system is used to monitor the refrigeration and thermostatic equipment in real time, and control the safety protection device to protect the refrigeration and thermostatic equipment according to the monitoring results.

[0076] As an optional embodiment: the safety protection system includes a data acquisition module, a central control module, a fault response module and a fault self-check module; it should be noted that in actual use, since the materials of automobile or aviation components need to withstand extreme climatic conditions during testing, if during the test process, the refrigeration and constant temperature equipment is exposed to certain risks during use due to high temperature and high pressure or low temperature and low pressure conditions, this technical solution can ensure the safety of personnel in the laboratory by performing real-time protection on the refrigeration and constant temperature equipment during use;

[0077] The data acquisition module is used to collect the operating parameter information and environmental information of the refrigeration thermostatic device; it should be noted that, in the present embodiment, the information of the data acquisition module is obtained through various sensors, including a temperature sensor for obtaining the temperature of the refrigeration thermostatic device, the sample and the environment; a pressure sensor for obtaining the pressure of the refrigeration thermostatic device and the environment; a humidity sensor for monitoring the humidity of the refrigeration thermostatic device and the external environment; a current sensor and a voltage sensor for monitoring the current and voltage of the refrigeration thermostatic device;

[0078] The central control module is used to receive the information from the data acquisition module and perform comprehensive analysis; the central control module includes a comprehensive calculation unit and a safety judgment unit, and the comprehensive calculation unit is used to predict whether there is a potential risk in the refrigeration constant temperature equipment in the current time period based on the information from the data acquisition module:

[0079] The temperature change rate R of the temperature in the current time period over time is obtained; it should be noted that the temperature change rate R is used to detect abnormal temperature fluctuations of the refrigeration thermostatic equipment. In this embodiment, the specific calculation method can be:

[0080] , wherein the time change difference is obtained by integrating the time from the start of operation of the refrigeration thermostatic device to the current time period, and the temperature change difference of the refrigeration thermostatic device and the ambient temperature change difference are obtained by the difference between the temperature of the refrigeration thermostatic device when the refrigeration device starts to operate and the temperature of the current time period and the difference between the temperature of the environment when the refrigeration device starts to operate and the temperature of the current time period;

[0081] The humidity change rate Q of the humidity in the current time period over time is obtained; it should be noted that the humidity change rate R is used to detect abnormal humidity fluctuations of the refrigeration constant temperature equipment. In this embodiment, the specific calculation method can be:

[0082] , wherein the time change difference is obtained by integrating the time from the start of the operation of the refrigeration thermostatic device to the current time period, and the humidity change difference of the refrigeration thermostatic device and the ambient temperature change difference are obtained by the difference between the humidity of the refrigeration thermostatic device when the refrigeration device starts to operate and the humidity of the current time period, and the difference between the humidity of the environment when the refrigeration device starts to operate and the humidity of the current time period;

[0083] The pressure change rate W of the pressure in the current time period over time is obtained; it should be noted that the pressure change rate R is used to detect abnormal pressure fluctuations of the refrigeration thermostatic equipment. In this embodiment, the specific calculation method can be:

[0084] , wherein the time change difference is obtained by integrating the time from the start of the operation of the refrigeration thermostatic device to the current time period, and the pressure change difference of the refrigeration thermostatic device and the ambient temperature change difference are obtained by the difference between the pressure of the refrigeration thermostatic device when the refrigeration device starts to operate and the pressure of the current time period and the difference between the pressure of the environment when the refrigeration device starts to operate and the pressure of the current time period;

[0085] According to the formula , obtain the temperature and pressure stability value E of the current time period, where and is a preset proportionality coefficient; it should be noted that, in this embodiment, and The values ​​of can be 0.459 and 0.541. It should also be noted that the temperature and pressure stability value E is used to evaluate the stability of temperature and pressure;

[0086] According to the formula , obtain the over-temperature and over-pressure risk assessment value T of the current time period, where and is the preset scaling factor, is the preset temperature value, The temperature value of the refrigeration constant temperature equipment in the current time period. is the preset pressure value, is the pressure value of the refrigeration constant temperature equipment in the current time period; it should be noted that, in this embodiment, and The values ​​of can be 0.309 and 0.691. It should also be noted that the over-temperature and over-pressure risk assessment value T is used to determine the risk of over-temperature and over-pressure of the refrigeration constant temperature equipment in the current time period based on the historical data of temperature and pressure;

[0087] According to the formula , calculate and obtain the comprehensive safety score of the refrigeration constant temperature equipment ,in , , , and is a preset proportionality coefficient; it should be noted that, in this embodiment, , , , and The values ​​of can be 0.129, 0.221, 0.196, 0.124 and 0.33; it should also be noted that by comprehensively and cross-calculating the various scoring values ​​of the refrigeration and thermostatic equipment, the overall safety of the refrigeration and thermostatic equipment can be evaluated. Compared with the traditional single calculation method, it is more in line with the actual operation of the refrigeration and thermostatic equipment, and not only considers the current temperature and pressure, but also includes the corresponding rate of change, stability and the gap with the safety limit;

[0088] A threshold value of the comprehensive safety score is set in advance. If the comprehensive safety score value Y is greater than the threshold value of the comprehensive safety score value, a signal is generated and transmitted to the safety judgment unit. If the comprehensive safety score value Y is less than or equal to the threshold value of the comprehensive safety score value, it is judged that the refrigeration thermostatic device maintains normal operation;

[0089] The safety judgment unit is used to make a logical judgment based on the result of the comprehensive calculation unit to determine whether safety protection is required, and transmit the judgment result to the fault response module; it should be noted that further judgment can be made based on the result of real-time monitoring, and whether the refrigeration thermostatic equipment needs safety protection can be evaluated at the first time, which can not only reduce the occurrence of misjudgment, but also reduce the loss caused by the failure of the refrigeration thermostatic equipment;

[0090] The fault response module is used to formulate a response strategy according to the judgment result of the safety judgment unit, and transmit the response strategy to the control component;

[0091] The fault self-diagnosis module is used to automatically monitor whether there is a fault in the safety protection system and provide a corresponding optimization strategy.

[0092] As an optional embodiment: the specific working mode of the safety judgment unit is as follows:

[0093] It should be noted that, in actual use, even if the comprehensive calculation unit makes a preliminary judgment that the current operating state of the refrigeration thermostatic equipment is abnormal, it is difficult to judge whether the refrigeration thermostatic equipment needs safety protection because the parameters of the refrigeration thermostatic equipment are affected by various reasons. Since the experiment is more important, if a misjudgment is made, it will cause greater damage. If protection cannot be carried out in time, there will also be safety hazards. This technical solution determines the current severity of the refrigeration thermostatic equipment based on a systematic evaluation and judges whether safety protection is needed;

[0094] According to the formula , obtain the risk assessment value P of the refrigeration constant temperature equipment, where n is the number of influencing factors, is the deviation rate of the i-th influencing factor, is the preset weight value of the i-th influencing factor; it should be noted that, in this embodiment, the number of n is 5, which are the temperature change rate R, humidity change rate Q, pressure change rate W, temperature and pressure stability value E and over-temperature and over-pressure risk assessment value T, is the i-th influencing factor, which in this embodiment specifically includes the temperature change rate R, humidity change rate Q, pressure change rate W, temperature and pressure stability value E, and the difference between the over-temperature and over-pressure risk assessment value T and the standard value;

[0095] A risk assessment value threshold is set in advance, and if the risk assessment value P is greater than the risk assessment value threshold, an alarm signal is generated and transmitted to the fault response module. It should be noted that by comparing the difference between each influencing factor and the preset standard and then performing a comprehensive calculation, it is possible to more comprehensively evaluate whether the refrigeration thermostatic equipment needs safety protection.

[0096] As an optional embodiment: The specific way to obtain is as follows:

[0097] The corresponding thresholds of the temperature change rate R, humidity change rate Q, pressure change rate W, temperature and pressure stability value E and over-temperature and over-pressure risk assessment value T are set in advance, and the corresponding marks are , , , and ;

[0098] It should also be noted that The corresponding weight It is obtained through staff evaluation. In this embodiment, .

[0099] As an optional embodiment: the specific working mode of the fault response module is as follows:

[0100] A threshold range of a risk assessment value is set in advance; it should be noted that in this embodiment, the threshold range of the risk assessment value is obtained by the threshold value of the risk assessment value ±3;

[0101] Compare the risk assessment value with the threshold range of the risk assessment value. If the risk assessment value P is less than the threshold range of the risk assessment value, mark the risk as low risk. If the risk assessment value P is within the threshold range of the risk assessment value, mark it as medium risk. If the risk assessment value P is greater than the threshold range of the risk assessment value, mark it as high risk.

[0102] The fault response module also includes a policy formulation unit, which is used to formulate a security protection strategy according to the assessed risk type. It should be noted that in this embodiment, the risk type is low risk, medium risk and high risk. Formulating the risk type according to the size of the risk assessment value P is conducive to the subsequent security protection strategy formulation.

[0103] As an optional embodiment: the specific working method of the policy formulation unit is as follows:

[0104] If the risk is low, a warning message is sent to the operator and the data at the current time point is recorded. It should be noted that this is beneficial for subsequent analysis.

[0105] If the risk is medium, the parameters will be adjusted back to the preset safety range, and some functions of the system will be restricted. It should be noted that non-critical operations will be turned off.

[0106] If the risk is high, the emergency stop button is triggered to quickly cut off the power supply. It should be noted that the access control safety lock is activated to prevent unauthorized personnel from entering potentially dangerous areas. Ensure that the grounding protection is activated to reduce the risk of electrical failure. Check the readiness of the fire-fighting device to ensure that it can be started immediately in the event of a fire.

[0107] As an optional embodiment: the specific working mode of the fault self-diagnosis module is as follows: It should be noted that the safety protection system may cause system abnormalities during use due to various reasons, such as historical maintenance and natural performance degradation, affecting the normal use of the refrigeration thermostatic equipment;

[0108] The historical fault frequency value H of the safety protection system is obtained; it should be noted that the historical fault frequency value H indicates the frequency of faults in the system history, which is usually calculated based on past data. The higher the value, the greater the historical fault rate;

[0109] The performance degradation trend value K of the safety protection system is obtained; it should be noted that the performance degradation trend value K represents the degradation rate of the system performance over time. If the gap between the current performance and the baseline performance increases over time, it indicates that the performance degradation trend is obvious, which may indicate an increased risk of failure in the future.

[0110] According to the formula , calculate and obtain the failure risk value L of the safety protection system;

[0111] A threshold of a fault risk value is set in advance. If the fault risk value L is greater than the threshold of the fixed risk value, it is judged that the safety protection system needs to be optimized. If not, it is judged that the safety protection system is operating normally.

[0112] The fault self-diagnosis module further includes a feedback unit, which is used to optimize and feedback the judgment threshold of the safety protection system according to the diagnosis result. It should be noted that, in this embodiment, the judgment threshold of the safety protection system is the threshold of the safety score value.

[0113] As an optional embodiment: the specific working mode of the feedback unit is as follows: It should be noted that when an abnormality occurs in the safety protection system, because the refrigeration thermostatic equipment is still in operation, if the test is stopped for maintenance, it will affect the progress of the test and cause losses. If maintenance is not performed, there will be safety hazards. This technical solution adjusts the judgment threshold accordingly when the safety protection system has problems such as aging, and can maintain the normal use of the safety protection system in a short period of time when the refrigeration thermostatic equipment is running, thereby reducing the losses caused;

[0114] According to the formula , calculate and obtain the adjustment value of the judgment threshold of the safety protection system ; Adjust the judgment threshold value Transmitted to the central control module for adjustment.

[0115] Working principle:

[0116] By making further judgments based on the results of real-time monitoring, it can be evaluated at the first time whether the refrigeration thermostatic equipment needs safety protection, which can not only reduce the occurrence of misjudgments, but also reduce the losses caused by failures of refrigeration thermostatic equipment; through systematic evaluation, the current severity of the refrigeration thermostatic equipment can be determined to determine whether safety protection is needed; when the safety protection system has problems such as aging, the judgment threshold can be adjusted accordingly, so that the safety protection system can be maintained in normal use for a short period of time when the refrigeration thermostatic equipment is running, thereby reducing the losses caused.

[0117] The above are only preferred implementations of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technical staff in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of this template.

Claims

1. A refrigeration and constant temperature equipment for material experiments with safety protection function, characterized in that: Including refrigeration and thermostatic equipment and safety protection system; The refrigeration and constant temperature equipment includes a control component, a heating component, a refrigeration component, a box protection component, and a safety protection component; The control assembly includes a master controller and sensors for controlling parameters within the refrigeration thermostatic device; The heating assembly includes an electric heater for providing heat; The refrigeration assembly includes a compressor, a condenser, an expansion valve and an evaporator, which are used to reduce the temperature; The control component is electrically connected to the heating component, the refrigeration component and the safety protection component, and the control component, the heating component, the refrigeration component and the safety protection component are all located inside the box protection component; The box protection component is located on the outer layer of the refrigeration constant temperature device, and the box protection component is composed of a cold-rolled steel plate; The safety protection component is used to provide safety protection and handle potential safety hazards when an abnormality occurs in the refrigeration and thermostatic equipment; The safety protection component includes a safety protection device and a safety protection system; The safety protection device includes an emergency stop button, an access control safety lock, a grounding protection and a fire protection device; The emergency stop button is used to quickly cut off the power supply; The access control safety lock is used to prevent unauthorized persons from accessing; The grounding protection is used to ensure the grounding of the refrigeration thermostatic equipment to prevent electrical failures; The fire-fighting device is used to extinguish open fire; The emergency stop button, access control safety lock, grounding protection and fire protection device are sequentially installed inside the box protection assembly; The safety protection system is used to monitor the refrigeration thermostatic equipment in real time, and control the safety protection device to protect the refrigeration thermostatic equipment according to the monitoring results; The safety protection system includes a data acquisition module, a central control module, a fault response module and a fault self-check module; The data acquisition module is used to collect operating parameter information and environmental information of the refrigeration constant temperature equipment; The central control module is used to receive the information from the data acquisition module and perform comprehensive analysis; the central control module includes a comprehensive calculation unit and a safety judgment unit, and the comprehensive calculation unit is used to predict whether there is a potential risk in the refrigeration constant temperature equipment in the current time period based on the information from the data acquisition module: Get the temperature change rate R of the current time period over time; Get the humidity change rate Q of the humidity in the current time period over time; Obtain the pressure change rate W of the current time period over time; According to the formula , obtain the temperature and pressure stability value E of the current time period, where and is the preset proportional coefficient; According to the formula , obtain the over-temperature and over-pressure risk assessment value T of the current time period, where and is the preset scaling factor, is the preset temperature value, The temperature value of the refrigeration constant temperature equipment in the current time period. is the preset pressure value, The pressure value of the refrigeration thermostatic equipment in the current time period; According to the formula , calculate and obtain the comprehensive safety score of the refrigeration constant temperature equipment ,in , , , and is the preset proportional coefficient; A threshold value of the comprehensive safety score is set in advance. If the comprehensive safety score value Y is greater than the threshold value of the comprehensive safety score value, a signal is generated and transmitted to the safety judgment unit. If the comprehensive safety score value Y is less than or equal to the threshold value of the comprehensive safety score value, it is judged that the refrigeration thermostatic device maintains normal operation; The safety judgment unit is used to perform a logical judgment based on the result of the comprehensive calculation unit to determine whether safety protection is required, and transmit the judgment result to the fault response module; The fault response module is used to formulate a response strategy according to the judgment result of the safety judgment unit, and transmit the response strategy to the control component; The safety protection system further comprises a fault self-diagnosis module, which is used to automatically monitor whether there is a fault in the safety protection system and provide a corresponding optimization strategy.

2. The refrigeration and constant temperature equipment for material experiments with safety protection function according to claim 1 is characterized in that: The box protection component also includes an insulation layer, which is made of hard polyurethane foam material and is used to reduce heat loss and maintain a stable internal temperature of the refrigeration constant temperature equipment.

3. The refrigeration and constant temperature equipment for material experiments with safety protection function according to claim 1, characterized in that: The specific working mode of the safety judgment unit is as follows: According to the formula , obtain the risk assessment value P of the refrigeration constant temperature equipment, where n is the number of influencing factors, is the deviation rate of the i-th influencing factor, is the preset weight value of the i-th influencing factor; A threshold of the risk assessment value is set in advance. If the risk assessment value P is greater than the threshold of the risk assessment value, an alarm signal is generated and transmitted to the fault response module.

4. The refrigeration and constant temperature equipment for material experiments with safety protection function according to claim 3 is characterized in that: Said The specific way to obtain is as follows: The corresponding thresholds of the temperature change rate R, humidity change rate Q, pressure change rate W, temperature and pressure stability value E and over-temperature and over-pressure risk assessment value T are set in advance, and the corresponding marks are , , , and ; 。 5. The refrigeration and constant temperature equipment for material experiments with safety protection function according to claim 4, characterized in that: The specific working mode of the fault response module is as follows: Set a threshold range of risk assessment values ​​in advance; Compare the risk assessment value with the threshold range of the risk assessment value. If the risk assessment value P is less than the threshold range of the risk assessment value, mark the risk as low risk. If the risk assessment value P is within the threshold range of the risk assessment value, mark it as medium risk. If the risk assessment value P is greater than the threshold range of the risk assessment value, mark it as high risk. The fault response module also includes a policy formulation unit, which is used to formulate a security protection policy according to the assessed risk type.

6. The refrigeration and constant temperature equipment for material experiments with safety protection function according to claim 5, characterized in that: The specific working method of the strategy formulation unit is as follows: If the risk is low, a warning message will be sent to the operator and the data at the current time point will be recorded; If the risk is medium, the parameters will be adjusted back to the preset safety range, limiting some functions of the system; If the risk is high, the emergency stop button is triggered to quickly cut off the power supply.

7. The refrigeration and constant temperature equipment for material experiments with safety protection function according to claim 6, characterized in that: The specific working mode of the fault self-diagnosis module is as follows: Obtain the historical fault frequency value H of the safety protection system; Obtain the performance degradation trend value K of the safety protection system; According to the formula , calculate and obtain the failure risk value L of the safety protection system; A threshold of a fault risk value is set in advance. If the fault risk value L is greater than the threshold of the fixed risk value, it is judged that the safety protection system needs to be optimized. If not, it is judged that the safety protection system is operating normally. The fault self-diagnosis module further includes a feedback unit, which is used to optimize and feedback-adjust the judgment threshold of the safety protection system according to the diagnosis result.

8. The refrigeration and constant temperature equipment for material experiments with safety protection function according to claim 7, characterized in that: The specific working mode of the feedback unit is as follows: According to the formula , calculate and obtain the adjustment value of the judgment threshold of the safety protection system ; The adjustment value of the judgment threshold Transmitted to the central control module for adjustment.

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