Security protection system, method, electronic device, and storage medium

Abstract

The application relates to the technical field of high-temperature heat pump units, in particular to a safety protection system and method, an electronic device and a storage medium. The safety protection system comprises a high-temperature heat pump unit, a use-side system and a protection component. The protection component comprises a temperature sensor, a humidity sensor, a refrigerant concentration sensor and a controller. The temperature sensor is configured to monitor the ambient temperature at the connection position of a heat exchanger and a cold carrier circulating pipeline. The humidity sensor is configured to monitor the air humidity at the connection position of the heat exchanger and the cold carrier circulating pipeline. The refrigerant concentration sensor is configured to monitor the refrigerant concentration in the environment where the high-temperature heat pump unit is located. The controller is configured to control the working state of a starting cabinet, a frequency converter and a circulating pump according to the ambient temperature, the air humidity and the refrigerant concentration. The safety accidents caused by high-pressure liquid splashing can be effectively prevented. The refrigerant leakage can be avoided to cause harm to the health of nearby personnel and reduce property loss.

Description

Technical Field

[0001] This application relates to the field of high-temperature heat pump unit technology, and in particular to a safety protection system, method, electronic device and storage medium. Background Technology

[0002] High-temperature heat pump units are highly dangerous to use. The cooling water circulation system of the user side system is usually a closed system. According to the characteristics of heat pump products, the refrigerant in the user side system can be 120°C high-pressure liquid water. The connection method of the piping of the user side system and the high-temperature heat pump unit is the same as that of conventional units. The metal hose is fixed to the unit shell and pipe by flange and gasket. The flange bolts are tightened with the same torque to prevent liquid leakage. To determine whether the piping is properly connected, it is only possible to turn on the system circulation pump and manually observe whether water is spraying or leaking at the pipe connection. There is no complete set of safety protection measures.

[0003] High-temperature heat pump units typically use high-pressure refrigerants, such as R1233zd(E), which has an atmospheric life of up to 26 days and is expensive to use. When the unit is operating normally, the system condensing pressure can reach 1400 kPa and the condensing temperature can reach 115℃. If the actual operating conditions are harsh and the temperature of the cooling refrigerant is high, the condensing temperature can continue to rise. For centrifugal chillers, this can lead to abnormal problems such as refrigerant leakage and opening of the shell and tube pressure relief valve. When it is possible to determine whether the refrigerant is leaking, it can only be done manually using a refrigerant leak detector. If the refrigerant is toxic, it will endanger the health of nearby people and poses certain risks.

[0004] The hazardous factors during the operation of high-temperature heat pump units include: (1) water leakage in the system pipelines of the high-temperature heat pump unit; (2) water leakage at the connection between the user-side system and the unit pipeline; and (3) leakage of high-temperature refrigerant from the unit. Therefore, the operation of high-temperature heat pump units is highly dangerous, and how to effectively protect against these hazardous factors is the key to ensuring the safe operation of high-temperature heat pump units. Summary of the Invention

[0005] This application provides a security protection system, method, electronic device, and storage medium to solve the above-mentioned problems.

[0006] In a first aspect, this application provides a security protection system, which includes:

[0007] The high-temperature heat pump unit includes a compressor, a heat exchanger, and a throttling device interconnected by refrigerant pipes, and also includes a starter cabinet and a frequency converter connected to the compressor.

[0008] The system includes a cold source, a refrigerant tank, a refrigerant circulation pipeline, and a circulation pump. The refrigerant tank is connected to a heat exchanger via the refrigerant circulation pipeline, and the circulation pump is configured to drive the flow of refrigerant within the refrigerant circulation pipeline.

[0009] The protection components include a temperature sensor, a humidity sensor, a refrigerant concentration sensor, and a controller. The temperature sensor is configured to monitor the ambient temperature at the connection between the heat exchanger and the refrigerant circulation pipeline. The humidity sensor is configured to monitor the air humidity at the connection between the heat exchanger and the refrigerant circulation pipeline. The refrigerant concentration sensor is configured to monitor the refrigerant concentration in the environment where the high-temperature heat pump unit is located. The controller is configured to control the operating status of the starter cabinet, the frequency converter, and the circulation pump based on the ambient temperature, the air humidity, and the refrigerant concentration.

[0010] Furthermore, the heat exchanger includes a condenser and an evaporator, the refrigerant circulation pipeline includes a refrigeration pipeline and a cooling pipeline, the circulation pump includes a refrigeration circulation pump and a cooling circulation pump, the refrigerant tank is connected to the condenser through the cooling pipeline, the refrigerant tank is connected to the evaporator through the refrigeration pipeline, the refrigeration circulation pump is configured to drive the flow of refrigerant in the refrigeration pipeline, and the cooling circulation pump is configured to drive the flow of refrigerant in the cooling pipeline.

[0011] Furthermore, the temperature sensor includes a first temperature sensor and a second temperature sensor, wherein the first temperature sensor is configured to monitor the ambient temperature at the connection between the condenser and the cooling pipe, and the second temperature sensor is configured to monitor the ambient temperature at the connection between the evaporator and the refrigeration pipe.

[0012] Furthermore, the humidity sensor includes a first humidity sensor and a second humidity sensor, wherein the first humidity sensor is configured to monitor the air humidity at the connection between the condenser and the cooling pipe, and the second humidity sensor is configured to monitor the air humidity at the connection between the evaporator and the refrigeration pipe.

[0013] Furthermore, the refrigerant circulation pipeline is connected to the heat exchanger via a metal flexible hose.

[0014] Secondly, this application provides a safety protection method that includes the following components during the operation of a high-temperature heat pump unit and the user-side system:

[0015] Real-time monitoring of air humidity at the connection point between the heat exchanger and the refrigerant circulation pipeline, and refrigerant concentration in the environment where the high-temperature heat pump unit is located;

[0016] If the air humidity is less than or equal to the air humidity protection value, and the refrigerant concentration is less than or equal to the refrigerant concentration protection value, then the control starter cabinet remains powered on and the frequency converter remains closed.

[0017] Furthermore, security measures also include:

[0018] Real-time monitoring of the ambient temperature at the connection point between the heat exchanger and the refrigerant circulation pipeline;

[0019] If the air humidity is greater than the air humidity protection value and the ambient temperature is greater than the ambient temperature protection value, then the inverter will be tripped and the circulating pump will be shut down.

[0020] If the ambient temperature is less than or equal to the ambient temperature protection value, and the refrigerant concentration is greater than the refrigerant concentration protection value, then the refrigerant tank is controlled to exchange heat with the cold source to reduce the system refrigerant temperature, and the frequency converter is controlled to trip.

[0021] Furthermore, during the startup process of the high-temperature heat pump unit and the user-side system, the safety protection methods include:

[0022] Start the circulation pump and monitor the air humidity at the connection between the heat exchanger and the refrigerant circulation pipeline, as well as the refrigerant concentration in the environment where the high-temperature heat pump unit is located, in real time.

[0023] If the air humidity is less than or equal to the air humidity protection value, and the refrigerant concentration is less than or equal to the refrigerant concentration protection value, then the control starter cabinet is powered on and the frequency converter is closed.

[0024] Furthermore, security measures also include:

[0025] Real-time monitoring of the ambient temperature at the connection point between the heat exchanger and the refrigerant circulation pipeline;

[0026] If the air humidity is greater than the air humidity protection value and the ambient temperature is greater than the ambient temperature protection value, then the circulation pump is turned off.

[0027] If the ambient temperature is less than or equal to the ambient temperature protection value, and the refrigerant concentration is greater than the refrigerant concentration protection value, then the refrigerant tank is controlled to exchange heat with the cold source to reduce the system refrigerant temperature, and the frequency converter is controlled to trip.

[0028] Thirdly, this application also provides an electronic device, which includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; the memory is used to store computer programs; and when the processor executes the program stored in the memory, it implements the security protection method provided in the second aspect of this application.

[0029] Fourthly, this application also provides a computer storage medium storing computer-executable instructions, which are used to execute the security protection method provided in the second aspect of this application.

[0030] Compared with the prior art, the above-mentioned technical solution provided in this application has the following advantages: The safety protection system of this application can detect refrigerant leakage and refrigerant pipeline leakage in a timely manner during the unit start-up and unit operation stages, and perform loss prevention operations after leakage occurs, effectively preventing high-temperature liquid splashing caused by refrigerant leakage and pipeline leakage, effectively responding to the occurrence of dangerous factors, and avoiding major safety accidents. Attached Figure Description

[0031] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0034] Figure 1 This is a schematic diagram of the high-security protection system provided in the embodiments of this application;

[0035] Figure 2 A schematic diagram of the control flow of the security protection method provided in the embodiments of this application.

[0036] Figure 3 This is a structural block diagram of an electronic device provided in an embodiment of this application.

[0037] Icon labels:

[0038] 1. Compressor; 2. Condenser; 3. Throttling device; 4. Evaporator; 5. Starter cabinet; 6. Inverter; 7. Cold source; 8. Refrigerant tank; 9. Refrigeration piping; 10. Cooling piping; 11. Refrigeration circulation pump; 12. Cooling circulation pump; 13. First temperature sensor; 14. Second temperature sensor; 15. First humidity sensor; 16. Second humidity sensor; 17. Refrigerant concentration sensor; 18. Metal hose. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0041] like Figure 1 As shown, the safety protection system provided in this application embodiment includes a high-temperature heat pump unit, a user-side system, and protective components. The high-temperature heat pump unit includes a compressor 1, a heat exchanger, and a throttling device 3 interconnected by refrigerant pipes. The unit also includes a starter cabinet 5 and a frequency converter 6 connected to the compressor 1. The user-side system includes a cold source 7, a refrigerant tank 8, a refrigerant circulation pipeline, and a circulation pump. The refrigerant tank 8 is connected to the heat exchanger via the refrigerant circulation pipeline, and the circulation pump is configured to drive the refrigerant flow within the pipeline. The protection components include a temperature sensor, a humidity sensor, a refrigerant concentration sensor 17, and a controller. The temperature sensor is configured to monitor the ambient temperature at the connection between the heat exchanger and the refrigerant circulation pipeline. The humidity sensor is configured to monitor the air humidity at the connection between the heat exchanger and the refrigerant circulation pipeline. The refrigerant concentration sensor 17 is configured to monitor the refrigerant concentration in the environment where the high-temperature heat pump unit is located. The controller is configured to control the operating status of the starter cabinet 5, the frequency converter 6, and the circulation pump based on the ambient temperature, the air humidity, and the refrigerant concentration.

[0042] The working principle of the high-temperature heat pump unit and the user-side system is as follows: The heat exchanger includes a condenser 2 and an evaporator 4. If necessary, an oil separator can be installed in the high-temperature heat pump unit. The gaseous refrigerant discharged from the compressor 1 is separated into oil and refrigerant in the oil separator. The oil sinks to the bottom, is filtered, and throttled before flowing back to the compressor 1. The gaseous refrigerant flows out from the top of the oil separator and into the condenser 2 for condensation and heat exchange, condensing into a high-temperature, high-pressure liquid. Then, it is throttled by the throttling device 3, becoming a high-temperature, low-pressure liquid, and enters the evaporator 4. The liquid refrigerant evaporates into a low-temperature gaseous refrigerant, which is drawn into the compressor 1 through the suction port, completing one cycle. This cycle repeats continuously, enabling the unit to operate continuously. For the refrigerant circulation in the user-side system, the refrigerant comes from the user side, is driven by a circulation pump into the evaporator 4, exchanges heat with the refrigerant, and then flows out of the heat exchanger back to the user side, completing one cycle in the refrigerant circulation pipeline. This cycle repeats continuously, providing a constant supply of refrigerant to the evaporator 4. The refrigerant can be water, ethylene glycol solution, salt water solution, etc. When the refrigerant passes through the evaporator 4, it absorbs heat from the refrigerant. As the refrigerant loses heat, it becomes a low-temperature liquid and flows to the user side.

[0043] The protection components include a temperature sensor, a humidity sensor, a refrigerant concentration sensor 17, and a controller. The temperature sensor monitors the ambient temperature T at the connection point between the heat exchanger and the refrigerant circulation pipeline. The humidity sensor monitors the air humidity φ at the connection point. The refrigerant concentration sensor 17 monitors the refrigerant concentration c in the environment where the high-temperature heat pump unit is located. After the shell and tube of the high-temperature heat pump unit's heat exchanger are connected to the refrigerant circulation pipeline of the user-side system, the circulating water pump of the user-side system is started, and the safety protection logic is activated. Figure 2 As shown, the process can be roughly divided into two stages: the unit startup process and the unit operation process.

[0044] The unit startup phase is the process from starting the circulating pump to powering on the starter cabinet 5 and closing the frequency converter 6.

[0045] To power on the starter cabinet 5 and close the inverter 6, the measured air humidity φ must be less than or equal to the air humidity protection value φ1, and the refrigerant concentration c must be less than or equal to the refrigerant concentration protection value c1.

[0046] ① If the air humidity φ is greater than the air humidity protection value φ1, and the ambient temperature T measured by the temperature sensor is greater than the ambient temperature protection value T1, the controller determines that the equipment is leaking water, issues a command to shut down the circulation pump, and can also display the equipment leak on the control cabinet to issue a reminder.

[0047] ② If the ambient temperature T measured by the temperature sensor is less than or equal to the ambient temperature protection value T1, and the refrigerant concentration c measured by the refrigerant concentration sensor is greater than the refrigerant concentration protection value c1, the controller determines that there is a refrigerant leak and issues a control command to perform the following operations: the refrigerant tank 8 exchanges heat with the cold source 7 to reduce the system water temperature, thereby reducing the refrigerant pressure of the unit; the inverter 6 trips; and the refrigerant leak can also be displayed on the control cabinet to issue a reminder.

[0048] During unit operation, if it is necessary to keep the starter cabinet 5 powered on, the inverter 6 closed, and the unit running, the air humidity φ must be less than or equal to the air humidity protection value φ1 and the refrigerant concentration c must be less than or equal to the refrigerant concentration protection value c1.

[0049] ① If the actual air humidity φ is greater than the air humidity protection value φ1, and the actual ambient temperature T measured by the temperature sensor is greater than the ambient temperature protection value T1, the controller determines that the equipment is leaking water. The controller issues a cooling execution inverter 6 trip to shut down the circulation pump. It can also display the equipment leak on the control cabinet to issue a reminder.

[0050] ② If the ambient temperature T is less than or equal to the ambient temperature protection value T1, and the refrigerant concentration c measured by the refrigerant concentration sensor is greater than the refrigerant concentration protection value c1, the controller determines that there is a refrigerant leak, issues a command to execute the heat exchange between the refrigerant tank 8 and the cold source 7 to reduce the system refrigerant temperature, thereby reducing the refrigerant pressure of the unit, and executes the tripping of the inverter 6. It can also display the refrigerant leak on the control cabinet to issue a reminder.

[0051] The safety protection system of this application can detect refrigerant leaks and refrigerant pipeline leaks in a timely manner during the unit start-up and operation phases, and perform loss prevention operations after a leak occurs, effectively preventing high-temperature liquid splashing caused by refrigerant leaks and pipeline leaks, effectively responding to the occurrence of dangerous factors, and avoiding major safety accidents.

[0052] In some embodiments, the heat exchanger includes a condenser 2 and an evaporator 4, the refrigerant circulation pipeline includes a refrigeration pipeline 9 and a cooling pipeline 10, the circulation pump includes a refrigeration circulation pump 11 and a cooling circulation pump 12, the refrigerant tank 8 is connected to the evaporator 4 via the refrigeration pipeline 9, and the refrigerant tank 8 is connected to the condenser 2 via the cooling pipeline 10. The refrigeration circulation pump 11 is configured to drive the flow of refrigerant within the refrigeration pipeline 9, and the cooling circulation pump 12 is configured to drive the flow of refrigerant within the cooling pipeline 10. The arrangement of the refrigeration pipeline 9, cooling pipeline 10, refrigeration circulation pump 11, and cooling circulation pump 12 enables the cyclic delivery of both refrigeration and cooling refrigerant. Taking water as the refrigerant as an example, the refrigerant evaporates and absorbs heat in evaporator 4. The refrigerant water flowing through evaporator 4 is chilled water. After absorbing heat, the temperature of the chilled water decreases, which can play a cooling role on the user side. That is, the chilled water delivers the cooling energy generated by the high-temperature heat pump unit into the room through the chilled circulation pump 11 and chilled pipes 9, and then the room's fan coil units exchange the cooling energy with the space. Thus, the cooling energy is transferred from the unit's heat exchanger to the room in use through the chilled water. The chilled water that has finished its use will return to the refrigerant tank 8 to exchange heat with the cold source 7. Cooling water is used to lower the temperature of the refrigerant. The water flowing through condenser 2 is cooling water. Condenser 2 lowers the temperature of the refrigerant coming out of compressor 1. The cooling water delivers a large amount of heat generated by the high-temperature heat pump unit during the cooling process to the refrigerant tank 8 through cooling pipes 10 and cooling circulation pump 12, and then is cooled by the cold source 7. Figure 1 The connection between the cooling pipe 10 and the refrigeration pipe 9 shown is only an illustration of one operating condition. During use, the connection can be adjusted by valves or pipes to achieve a circulation loop between the cooling refrigerant and the refrigeration refrigerant and the two heat exchangers.

[0053] Based on the above embodiments, the temperature sensor includes a first temperature sensor 13 and a second temperature sensor 14. The first temperature sensor 13 is configured to monitor the ambient temperature T at the connection between the condenser 2 and the cooling pipe 10, and the second temperature sensor 14 is configured to monitor the ambient temperature T at the connection between the evaporator 4 and the refrigerant pipe 9. This configuration is adapted to the arrangement of the refrigerant circulation pipeline including the refrigerant pipe 9 and the cooling pipe 10, and can perform targeted temperature detection on potential leak areas. The refrigerant inlet and outlet of the condenser 2 are respectively connected to the cooling pipe 10, thereby forming two connection points between the condenser 2 and the cooling pipe 10. The detection position of the first temperature sensor 13 is preferably set in the middle of the two connection points. Similarly, the refrigerant inlet and outlet of the evaporator 4 are respectively connected to the refrigerant pipe 9, thereby forming two connection points between the evaporator 4 and the refrigerant pipe 9. The detection position of the second temperature sensor 14 is preferably set in the middle of the two connection points.

[0054] In some embodiments, the humidity sensor includes a first humidity sensor 15 and a second humidity sensor 16. The first humidity sensor 15 is configured to monitor the air humidity φ at the connection between the condenser 2 and the cooling pipe 10, and the second humidity sensor 16 is configured to monitor the air humidity φ at the connection between the evaporator 4 and the refrigerant pipe 9. This arrangement is adapted to configurations where the refrigerant circulation piping includes the refrigerant pipe 9 and the cooling pipe 10, allowing for targeted humidity detection of potential leak areas. The refrigerant inlet and outlet of the condenser 2 are respectively connected to the cooling pipe 10, thus forming two connection points between the condenser 2 and the cooling pipe 10. The detection position of the first humidity sensor 15 is preferably located in the middle of the two connection points. Similarly, the refrigerant inlet and outlet of the evaporator 4 are respectively connected to the refrigerant pipe 9, thus forming two connection points between the evaporator 4 and the refrigerant pipe 9. The detection position of the second humidity sensor 16 is preferably located in the middle of the two connection points.

[0055] In some embodiments, the refrigerant circulation pipeline is connected to the heat exchanger via a flexible metal hose 18. The flexible metal hose 18 serves to compensate for installation deviations, absorb vibrations, and withstand complex operating conditions such as high temperature and high pressure, and low temperature and low pressure, while simultaneously transmitting the medium.

[0056] Based on the same technical concept, this application also provides a security protection method for the security protection system applied to the aforementioned embodiments.

[0057] like Figure 2 As shown, during the operation of the high-temperature heat pump unit and the user-side system, the safety protection method includes: real-time detection of the air humidity φ at the connection between the heat exchanger and the refrigerant circulation pipeline, and the refrigerant concentration c in the environment where the high-temperature heat pump unit is located; when there are multiple air humidity sensors, the maximum measured air humidity value is used as the air humidity φ, and the same applies below.

[0058] If the air humidity φ is less than or equal to the air humidity protection value φ1, and the refrigerant concentration c is less than or equal to the refrigerant concentration protection value c1, then the control starter cabinet 5 remains powered on and the frequency converter 6 remains closed.

[0059] If the air humidity φ is less than or equal to the air humidity protection value φ1, and the refrigerant concentration c is greater than the refrigerant concentration protection value c1, then the refrigerant tank 8 exchanges heat with the cold source 7 to reduce the system water temperature, thereby reducing the refrigerant pressure of the unit. The inverter 6 trips, and the control cabinet can also display a refrigerant leak to issue a reminder.

[0060] This step outlines the conditions for maintaining normal operation of the high-temperature heat pump unit during the operation of the user-side system. An air humidity φ less than or equal to the air humidity protection value φ1 indicates no refrigerant leakage at the pipe connections. A refrigerant concentration c less than or equal to the refrigerant concentration protection value c1 indicates no refrigerant leakage in the high-temperature heat pump unit's refrigerant circulation. In this case, the starter cabinet 5 remains powered on, and the inverter 6 remains closed to maintain the normal operation of the high-temperature heat pump unit. However, if the refrigerant concentration c exceeds the refrigerant concentration protection value c1, it indicates a refrigerant leak in the high-temperature heat pump unit. In this situation, heat exchange occurs between the refrigerant tank 8 and the cold source 7. The cold source 7 can be fully opened to lower the system water temperature, thereby reducing the refrigerant pressure of the unit. Simultaneously, the inverter 6 is tripped to stop the operation of the high-temperature heat pump unit. A refrigerant leak warning can also be displayed on the control cabinet.

[0061] Based on the above implementation method, the safety protection method further includes: real-time detection of the ambient temperature T at the connection between the heat exchanger and the refrigerant circulation pipeline. When multiple temperature sensors are present, the maximum measured ambient temperature is taken as the ambient temperature T, and the same applies below. If the air humidity φ is greater than the air humidity protection value φ1, and the ambient temperature T is greater than the ambient temperature protection value T1, then the inverter 6 is controlled to trip and the circulation pump is shut down. If the ambient temperature T is less than or equal to the ambient temperature protection value T1, and the refrigerant concentration c is greater than the refrigerant concentration protection value c1, then the refrigerant tank 8 is controlled to exchange heat with the cold source 7 to reduce the system refrigerant temperature, and the inverter 6 is controlled to trip.

[0062] In this step, if the air humidity φ is greater than the air humidity protection value φ1, it indicates that there may be a refrigerant leak at the pipe connection. At this time, the ambient temperature T is compared. If the ambient temperature T is greater than the ambient temperature protection value T1, it indicates that there is a refrigerant leak at the pipe connection, resulting in abnormal temperature and humidity. At this time, the inverter 6 should be tripped and the circulation pump should be shut down so that the refrigerant circulation pipeline of the high-temperature heat pump unit and the user side system stops operating.

[0063] Furthermore, when the air humidity φ is greater than the air humidity protection value φ1, but the ambient temperature T is less than or equal to the ambient temperature protection value T1, it indicates that the humidity change is not caused by refrigerant leakage. In this case, the subsequent execution strategy can be formulated based on the determination of refrigerant concentration c and refrigerant concentration protection value c1. That is, if the refrigerant concentration c is greater than the refrigerant concentration protection value c1, the heat exchange between the refrigerant tank 8 and the cold source 7 is controlled to reduce the system refrigerant temperature, and the inverter 6 is controlled to trip, and the refrigerant leakage is displayed on the control cabinet. If the refrigerant concentration c is less than or equal to the refrigerant concentration protection value c1, the starter cabinet 5 remains powered on, the inverter 6 remains closed, and the display screen on the control cabinet shows that the unit is running.

[0064] In some implementations, during the startup process of the high-temperature heat pump unit and the user-side system, the safety protection method includes: starting the circulation pump and monitoring in real time the air humidity φ at the connection between the heat exchanger and the refrigerant circulation pipeline, and the refrigerant concentration c in the environment where the high-temperature heat pump unit is located; if the air humidity φ is less than or equal to the air humidity protection value φ1, and the refrigerant concentration c is less than or equal to the refrigerant concentration protection value c1, then the starter cabinet 5 is powered on and the frequency converter 6 is closed.

[0065] This step outlines the conditions for normal startup of the high-temperature heat pump unit and the user-side system. If the air humidity φ is less than or equal to the air humidity protection value φ1, it indicates no refrigerant leakage at the pipe connections. If the refrigerant concentration c is less than or equal to the refrigerant concentration protection value c1, it indicates no refrigerant leakage in the high-temperature heat pump unit's refrigerant circulation. In this case, the control starter cabinet 5 is powered on, the inverter 6 is closed, and the high-temperature heat pump unit can be started. However, if the refrigerant concentration c exceeds the refrigerant concentration protection value c1, it indicates a refrigerant leak in the high-temperature heat pump unit. In this case, heat exchange occurs between the refrigerant tank 8 and the cold source 7. The cold source 7 can be fully opened to lower the system water temperature, thereby reducing the refrigerant pressure of the unit. Simultaneously, the inverter 6 is tripped to stop the high-temperature heat pump unit's operation. A refrigerant leak warning can also be displayed on the control cabinet.

[0066] In some embodiments, the safety protection method further includes: real-time detection of the ambient temperature T at the connection between the heat exchanger and the refrigerant circulation pipeline; if the air humidity φ is greater than the air humidity protection value φ1, and the ambient temperature T is greater than the ambient temperature protection value T1, then the circulation pump is shut down; if the ambient temperature T is less than or equal to the ambient temperature protection value T1, and the refrigerant concentration c is greater than the refrigerant concentration protection value c1, then the refrigerant tank 8 is controlled to exchange heat with the cold source 7 to reduce the system refrigerant temperature, and the inverter 6 is controlled to trip. In this step, if the air humidity φ is greater than the air humidity protection value φ1, it indicates that there may be a refrigerant leak at the pipeline connection. At this time, the ambient temperature T is compared. If the ambient temperature T is greater than the ambient temperature protection value T1, it indicates that there is a refrigerant leak at the pipeline connection, resulting in abnormal temperature and humidity. At this time, the circulation pump should be shut down so that the refrigerant circulation pipeline of the user-side system stops starting and running, and the equipment leakage can be displayed on the control cabinet screen.

[0067] Furthermore, when the air humidity φ is greater than the air humidity protection value φ1, but the ambient temperature T is less than or equal to the ambient temperature protection value T1, it indicates that the humidity change is not caused by refrigerant leakage. In this case, the subsequent execution strategy can be formulated based on the determination of refrigerant concentration c and refrigerant concentration protection value c1. That is, if the refrigerant concentration c is greater than the refrigerant concentration protection value c1, the heat exchange between the refrigerant tank 8 and the cold source 7 is controlled to reduce the system refrigerant temperature, and the inverter 6 is controlled to trip, and the refrigerant leakage is displayed on the control cabinet. If the refrigerant concentration c is less than or equal to the refrigerant concentration protection value c1, the starter cabinet 5 is powered on and the inverter 6 is closed to complete the start-up of the high-temperature heat pump unit.

[0068] It should be noted that the air humidity protection value φ1, refrigerant concentration protection value c1, and ambient temperature protection value T1 in this application can be specifically set according to the equipment parameters and the needs of the working environment. For example, in Zhuhai, where the annual air humidity is between 71% and 93%, φ1 can be set to 95%, which can be further confirmed by referring to the ambient humidity before the test; in summer, the ambient temperature can reach as high as 34 degrees Celsius, so the ambient temperature protection value T1 can be set above 40 degrees Celsius, and the specific setting can be further optimized according to the actual type of testing unit; in general, the refrigerant concentration detection at the site is not higher than 20 ppm, so the refrigerant concentration protection value c1 can be set slightly higher than 20 ppm, and the specific setting can be determined according to the actual usage.

[0069] like Figure 3 As shown in the figure, this application provides an electronic device including a processor 801, a communication interface 802, a memory 803, and a communication bus 804, wherein the processor 801, the communication interface 802, and the memory 803 communicate with each other through the communication bus 804.

[0070] The memory 803 is used to store computer programs.

[0071] In one embodiment of this application, when the processor 801 executes the program stored in the memory 803, it implements the security protection method provided in any of the foregoing method embodiments, including: real-time detection of the air humidity at the connection between the heat exchanger and the refrigerant circulation pipeline, and the refrigerant concentration in the environment where the high-temperature heat pump unit is located; if the air humidity is less than or equal to the air humidity protection value, and the refrigerant concentration is less than or equal to the refrigerant concentration protection value, then the starter cabinet is kept powered on and the frequency converter is kept closed.

[0072] Optionally, the safety protection method further includes real-time detection of the ambient temperature at the connection between the heat exchanger and the refrigerant circulation pipeline; if the air humidity is greater than the air humidity protection value and the ambient temperature is greater than the ambient temperature protection value, then the inverter is controlled to trip and the circulation pump is shut down; if the ambient temperature is less than or equal to the ambient temperature protection value and the refrigerant concentration is greater than the refrigerant concentration protection value, then the refrigerant tank is controlled to exchange heat with the cold source to reduce the system refrigerant temperature, and the inverter is controlled to trip.

[0073] Optionally, during the startup process of the high-temperature heat pump unit and the user-side system, the safety protection method includes: starting the circulation pump and monitoring the air humidity at the connection between the heat exchanger and the refrigerant circulation pipeline, and the refrigerant concentration in the environment where the high-temperature heat pump unit is located in real time; if the air humidity is less than or equal to the air humidity protection value, and the refrigerant concentration is less than or equal to the refrigerant concentration protection value, then controlling the starter cabinet to be powered on and the frequency converter to be closed.

[0074] Optionally, the safety protection method further includes real-time detection of the ambient temperature at the connection between the heat exchanger and the refrigerant circulation pipeline; if the air humidity is greater than the air humidity protection value and the ambient temperature is greater than the ambient temperature protection value, then the circulation pump is shut down; if the ambient temperature is less than or equal to the ambient temperature protection value and the refrigerant concentration is greater than the refrigerant concentration protection value, then the refrigerant tank is controlled to exchange heat with the cold source to reduce the system refrigerant temperature, and the frequency converter is controlled to trip.

[0075] This application also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the steps of the security protection method provided in any of the foregoing method embodiments.

[0076] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0077] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a general-purpose hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the parts that contribute to the related technology, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods of various embodiments or some parts of the embodiments.

[0078] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “” used herein may also indicate the inclusion of the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated, unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0079] The above are merely specific embodiments of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A security protection system, characterized in that, include: The high-temperature heat pump unit includes a compressor, a heat exchanger, and a throttling device interconnected by refrigerant pipes, and also includes a starter cabinet and a frequency converter connected to the compressor. The system includes a cold source, a refrigerant tank, a refrigerant circulation pipeline, and a circulation pump. The refrigerant tank is connected to a heat exchanger via the refrigerant circulation pipeline, and the circulation pump is configured to drive the refrigerant to circulate within the refrigerant circulation pipeline. The protection components include a temperature sensor, a humidity sensor, a refrigerant concentration sensor, and a controller. The temperature sensor is configured to monitor the ambient temperature at the connection between the heat exchanger and the refrigerant circulation pipeline. The humidity sensor is configured to monitor the air humidity at the connection between the heat exchanger and the refrigerant circulation pipeline. The refrigerant concentration sensor is configured to monitor the refrigerant concentration in the environment where the high-temperature heat pump unit is located. The controller is configured to control the operating status of the starter cabinet, the frequency converter, and the circulation pump based on the ambient temperature, the air humidity, and the refrigerant concentration.

2. The security protection system according to claim 1, characterized in that, The heat exchanger includes a condenser and an evaporator, the refrigerant circulation pipeline includes a refrigeration pipeline and a cooling pipeline, the circulation pump includes a refrigeration circulation pump and a cooling circulation pump, the refrigerant tank is connected to the condenser through the cooling pipeline, the refrigerant tank is connected to the evaporator through the refrigeration pipeline, the refrigeration circulation pump is configured to drive the flow of refrigerant in the refrigeration pipeline, and the cooling circulation pump is configured to drive the flow of refrigerant in the cooling pipeline.

3. The security protection system according to claim 2, characterized in that, The temperature sensor includes a first temperature sensor and a second temperature sensor. The first temperature sensor is configured to monitor the ambient temperature at the connection between the condenser and the cooling pipe, and the second temperature sensor is configured to monitor the ambient temperature at the connection between the evaporator and the refrigeration pipe.

4. The security protection system according to claim 2, characterized in that, The humidity sensor includes a first humidity sensor and a second humidity sensor. The first humidity sensor is configured to monitor the air humidity at the connection between the condenser and the cooling pipe, and the second humidity sensor is configured to monitor the air humidity at the connection between the evaporator and the refrigeration pipe.

5. The security protection system according to claim 1, characterized in that, The refrigerant circulation pipeline is connected to the heat exchanger via a metal flexible hose.

6. A security protection method applied to the security protection system according to any one of claims 1-5, characterized in that, During the operation of the high-temperature heat pump unit and the user-side system, the safety protection methods include: Real-time monitoring of air humidity at the connection point between the heat exchanger and the refrigerant circulation pipeline, and refrigerant concentration in the environment where the high-temperature heat pump unit is located; If the air humidity is less than or equal to the air humidity protection value, and the refrigerant concentration is less than or equal to the refrigerant concentration protection value, then the control starter cabinet remains powered on and the frequency converter remains closed.

7. The safety protection method according to claim 6, characterized in that, Also includes: Real-time monitoring of the ambient temperature at the connection point between the heat exchanger and the refrigerant circulation pipeline; If the air humidity is greater than the air humidity protection value and the ambient temperature is greater than the ambient temperature protection value, then the inverter will be tripped and the circulating pump will be shut down. If the ambient temperature is less than or equal to the ambient temperature protection value, and the refrigerant concentration is greater than the refrigerant concentration protection value, then the refrigerant tank is controlled to exchange heat with the cold source to reduce the refrigerant temperature in the system, and the frequency converter is controlled to trip.

8. The security protection method according to claim 6, characterized in that, During the startup process of the high-temperature heat pump unit and the user-side system, the safety protection methods include: Start the circulation pump and monitor the air humidity at the connection between the heat exchanger and the refrigerant circulation pipeline, as well as the refrigerant concentration in the environment where the high-temperature heat pump unit is located, in real time. If the air humidity is less than or equal to the air humidity protection value, and the refrigerant concentration is less than or equal to the refrigerant concentration protection value, then the control starter cabinet is powered on and the frequency converter is closed.

9. The security protection method according to claim 8, characterized in that, Also includes: Real-time monitoring of the ambient temperature at the connection point between the heat exchanger and the refrigerant circulation pipeline; If the air humidity is greater than the air humidity protection value and the ambient temperature is greater than the ambient temperature protection value, then the circulation pump is turned off. If the ambient temperature is less than or equal to the ambient temperature protection value, and the refrigerant concentration is greater than the refrigerant concentration protection value, then the refrigerant tank is controlled to exchange heat with the cold source to reduce the refrigerant temperature in the system, and the frequency converter is controlled to trip.

10. An electronic device, characterized in that, It includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; The memory is used to store computer programs; When the processor executes the program stored in the memory, it implements the security protection method according to any one of claims 6-9.

11. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, which, when executed by a processor, implements the security protection method according to any one of claims 6-9.

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