Safety monitoring method and system for water chilling unit

Abstract

The invention discloses a safety monitoring method and system for a water chilling unit. The monitoring method comprises the steps that the current condensation temperature and evaporation temperature of the water chilling unit are obtained; based on the condensation temperature, the evaporation temperature and two preset calculation parameters, the compressor current value and the exhaust temperature of the water chilling unit are calculated; when the water chilling unit meets any one of the following conditions, an abnormal alarm is given out; the first condition is that the deviation between the compressor current value and a set compressor current standard value or a compressor current detection value detected by a compressor current sensor is greater than a preset first threshold value; the second condition is that the deviation between the exhaust temperature and a set exhaust temperature standard value or an exhaust temperature detection value detected by the exhaust temperature sensor is greater than a preset second threshold value. According to the safety monitoring method based on the water chilling unit, the misjudgment probability can be reduced, and more comprehensive and accurate abnormity monitoring is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of abnormality detection of chillers, and in particular to a safety monitoring method and system for chillers. Background Art

[0002] A chiller is a refrigeration device used to provide low-temperature chilled water. It is widely used in air conditioning systems and industrial cooling processes. Its main components include a compressor, evaporator, condenser, and expansion valve. Through a refrigeration cycle, a chiller cools room-temperature water to a specific temperature to meet various cooling needs.

[0003] In existing safety monitoring procedures for chillers, abnormality detection is often based on the unit's status parameters to judge its operating status. The status parameters are usually obtained based on detection equipment (such as sensors) additionally installed on the chiller and compared with preset fixed thresholds. If the limit is exceeded, an alarm will be triggered. Under this detection method, the data source used as the judgment standard is single, and if the sensor drifts, is damaged, or fails to calibrate, the chiller will not be able to identify false alarms or missed alarms, which can easily lead to misjudgment of faults.

[0004] Furthermore, traditional monitoring methods often focus on a single parameter, lacking comprehensive analysis and utilization of multi-dimensional operating parameters. Comprehensive consideration (i.e., judging based on multiple chiller status parameters) often requires installing a full suite of testing equipment, which significantly increases hardware costs. Summary of the Invention

[0005] The purpose of the present invention is to provide a safety monitoring method and system for chillers that can reduce the probability of misjudgment caused by a single data source and integrate multiple state parameters to make more comprehensive and accurate judgments on abnormalities.

[0006] To achieve the above object, the present invention discloses a safety monitoring method for a chiller, comprising: Get the current condensing temperature and evaporating temperature of the chiller; Calculating a compressor current value and an exhaust temperature of the chiller based on the condensing temperature, the evaporating temperature, and two sets of preset calculation parameters, wherein the two sets of calculation parameters correspond to the compressor current value and the exhaust temperature, respectively; When the chiller meets any of the following conditions, an abnormal alarm is issued; The first condition is that the deviation between the compressor current value and the set compressor current standard value or the compressor current detection value obtained by the compressor current sensor is greater than a preset first threshold value; The second condition is that a deviation between the exhaust temperature and a set exhaust temperature standard value or an exhaust temperature detection value obtained by the exhaust temperature sensor is greater than a preset second threshold value.

[0007] Furthermore, the compressor current value and the exhaust temperature are calculated based on the following formula:

[0008] in, is the compressor current or the exhaust gas temperature, For calculating the compressor current or the exhaust temperature, the corresponding groups of calculation parameters are: Indicates the coefficients, is the evaporation temperature, is the condensation temperature.

[0009] Specifically, the monitoring method further includes: calculating exhaust gas superheat based on the condensing temperature and the exhaust gas temperature; Calculating based on the condensing temperature and the exhaust gas temperature detection value to obtain a measured exhaust gas superheat; When the chiller meets any one of the first condition, the second condition and the following third condition, an abnormality alarm is issued; The third condition is that a deviation between the exhaust superheat and a set exhaust superheat standard value or the actually measured exhaust superheat is greater than a preset third threshold.

[0010] Furthermore, the calculation formulas for the exhaust gas superheat and the measured exhaust gas superheat are:

[0011] in, is the condensation temperature, is the exhaust temperature or the exhaust temperature detection value, is the exhaust gas superheat or the measured exhaust gas superheat, when When is the exhaust temperature, is the exhaust gas superheat, when When is the exhaust temperature detection value, is the measured exhaust gas superheat.

[0012] Specifically, the monitoring method further includes: Calculating a mass flow rate of the chiller based on the condensing temperature and the evaporating temperature; calculating a suction flow rate of the chiller based on the mass flow rate; When the chiller meets any one of the first condition, the second condition and the fourth condition described below, an abnormality alarm is issued; The fourth condition is that the inspiratory flow rate is less than a preset first inspiratory flow rate standard value and the duration thereof is greater than a preset first duration.

[0013] Furthermore, the mass flow rate is calculated based on the following formula:

[0014] in, is the mass flow rate, is the calculation parameter corresponding to the mass flow rate, Indicates the coefficients, is the evaporation temperature, is the condensation temperature.

[0015] Furthermore, the monitoring method further includes a fifth condition, when the chiller meets any one of the first condition, the second condition, the fourth condition and the fifth condition described below, an abnormality alarm is issued; The fifth condition is that the inspiratory flow rate is greater than a preset second inspiratory flow rate standard value and the duration thereof is greater than a preset second duration.

[0016] Specifically, the monitoring method further includes a regulating method for regulating the performance of the chiller, the regulating method comprising: Calculating based on the preset calculation parameters corresponding to the cooling capacity and the compressor power, the current evaporation temperature, and the current condensation temperature to obtain the current cooling capacity and the compressor power of the chiller; Obtaining the current operating power of the fan of the chiller, and performing calculation based on the fan operating power, the cooling capacity, and the compressor power to obtain a coefficient of performance; An operating state of the chiller is adjusted based on the coefficient of performance.

[0017] Furthermore, the cooling capacity and the compressor power are calculated based on the following formula:

[0018] in, is the cooling capacity or the compressor power, For calculating the cooling capacity or the compressor power, the corresponding groups of calculation parameters are: Indicates the coefficients, is the evaporation temperature, is the condensation temperature.

[0019] The present invention further discloses a safety monitoring system for a chiller, which operates based on the safety monitoring method for a chiller as described above.

[0020] The present invention also discloses a safety monitoring system for a chiller, comprising: one or more processors; Memory; and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the programs including instructions for executing the safety monitoring method for the chiller as described above.

[0021] The present invention also discloses a computer-readable storage medium, characterized in that it includes a computer program, and the computer program can be executed by a processor to complete the safety monitoring method of the chiller as described above.

[0022] Compared with the prior art, the safety monitoring method for the chiller provided by the above technical solution of the present invention first obtains the condensing temperature and evaporating temperature through the sensors provided by the chiller, and then calculates the compressor current value and exhaust temperature of the chiller through the evaporating temperature and condensing temperature. The calculated values are compared with the set standard values or the measured detection values, which can avoid and reduce the misjudgment of a single data source: if the compressor current value and exhaust temperature deviate greatly from the compressor current standard value and exhaust temperature standard value, it may indicate that the operation of the chiller deviates from the proper working conditions. If the compressor current value and exhaust temperature deviate greatly from the compressor current detection value and exhaust temperature detection value, it may indicate that the sensor is faulty or the calculation result has a large deviation, which needs to be corrected in time to maintain normal unit operation and abnormal judgment process. Secondly, the monitoring method makes abnormal judgment based on the operating parameters of more than one chiller, avoiding the failure of the judgment method of a single operating parameter to detect abnormalities in time, making the detection more comprehensive and improving the accuracy of abnormal detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Flowchart of the monitoring method in an embodiment of the present invention.

[0024] Figure 2 FIG. 4 is a flow chart of a monitoring method in another embodiment of the present invention.

[0025] Figure 3 FIG. 4 is a flow chart of a monitoring method in another embodiment of the present invention.

[0026] Figure 4 FIG. 4 is a flow chart of a monitoring method in another embodiment of the present invention. DETAILED DESCRIPTION

[0027] In order to explain the technical content, structural features, achieved objectives and effects of the present invention in detail, the following is a detailed description in conjunction with the embodiments and the accompanying drawings.

[0028] The embodiment of the present invention discloses a safety monitoring method for a chiller, which uses a combination of multiple status parameters to make a more comprehensive and accurate judgment on abnormalities, while reducing the probability of misjudgment caused by a single data source. Figure 1 As shown, the safety monitoring method of the chiller specifically includes the following steps: S11: Acquire the current condensing temperature and evaporating temperature of the chiller. The condensing temperature and evaporating temperature are acquired by sensors within the chiller.

[0029] S12: Calculate the compressor current value and exhaust temperature of the chiller based on the condensing temperature, the evaporating temperature, and two sets of preset calculation parameters. The two sets of calculation parameters correspond to the compressor current value and the exhaust temperature, respectively. Based on the corresponding sets of calculation parameters, the compressor current value and exhaust temperature can be calculated when only the condensing temperature sensor and the evaporating temperature sensor are installed to obtain the condensing temperature and the evaporating temperature.

[0030] S13: Determine whether the deviation between the compressor current value and the set compressor current standard value or the compressor current detection value obtained by the compressor current sensor is greater than the preset first threshold value. If so, jump to step S15, if not, jump to step S14. The compressor current standard value is a preset fixed value, and the compressor current sensor is usually a sensor that comes with the compressor. The first threshold value can be set to 5% of the compressor current standard value or the compressor current detection value. The 5% is not a specific restriction. Relevant technicians can increase or decrease the 5% according to actual conditions to adjust the size of the first threshold value. Preferably, the first threshold value can be divided into two sub-first threshold values corresponding to the compressor current standard value and the compressor current detection value, respectively. By comparing and judging with the corresponding sub-first threshold values, more accurate abnormality judgment can be made, which is conducive to improving monitoring accuracy.

[0031] S14: Determine whether the deviation between the exhaust temperature and the set exhaust temperature standard value or the exhaust temperature detection value obtained by the exhaust temperature sensor is greater than a preset second threshold value. If so, jump to step S15; if not, jump to step S11. The exhaust temperature standard value is a preset fixed value, and the second threshold value can be set to 5% of the exhaust temperature standard value or the exhaust temperature detection value. This 5% is not a specific limitation, and relevant technicians can increase or decrease the 5% according to actual conditions to adjust the size of the second threshold value. Preferably, the second threshold value can be divided into two sub-second threshold values corresponding to the exhaust temperature standard value and the exhaust temperature detection value, respectively. By comparing and judging with the corresponding sub-second threshold values, more accurate abnormality judgment can be made, which is conducive to improving monitoring accuracy.

[0032] S15: The chiller issues an abnormality alarm. After receiving the abnormality alarm from the chiller, the operation and maintenance personnel immediately conduct an abnormality inspection on the chiller.

[0033] Compared with the existing technology, the safety monitoring method for chillers proposed in the present invention has advantages. This method innovatively obtains the two key parameters, condensing temperature and evaporating temperature, directly through sensors. Based on preset calculation parameters, it can accurately calculate important operating parameters such as compressor current value and exhaust temperature. The operating parameters reflect the intrinsic correlation between evaporation temperature, condensing temperature and other operating parameters. After obtaining the calculated value (compressor current, exhaust temperature), the monitoring method will compare the calculated value with the reference value of two dimensions: on the one hand, it is compared with the standard value of compressor current and standard value of exhaust temperature set by the chiller, which is used to evaluate the degree of deviation between the actual operating status and the theoretical design; on the other hand, it is cross-validated with the compressor current detection value and exhaust temperature detection value transmitted by the real-time sensor to determine the reliability of the measuring sensor. This double verification mechanism effectively avoids the misjudgment problem that may be caused by traditional single data source monitoring: when there is a significant deviation between the calculated value and the standard value of the compressor current and the standard value of the exhaust temperature, it can be used as an early warning that the operation of the chiller has deviated from the normal operating conditions and there may be performance degradation or potential failure; and when the calculated value differs too much from the compressor current detection value and the exhaust temperature detection value, it may indicate a sensor failure or the calculation model (the calculation formula in this monitoring method) needs to be corrected, thereby reducing the chance of misjudgment and ensuring the continued reliability of the monitoring system.

[0034] Furthermore, this method achieves multi-dimensional anomaly detection by comprehensively analyzing multiple operating parameters during chiller operation. When abnormal fluctuations in one or more parameters, such as compressor current and exhaust temperature, occur, the chiller can be quickly identified and the fault type accurately located. Compared to traditional single-factor detection methods, this monitoring method provides improved comprehensiveness and accuracy.

[0035] In summary, the present invention provides a chiller safety monitoring method that calculates compressor current and exhaust temperature using condensing and evaporating temperatures, reducing the likelihood of misjudgment of abnormalities. Compared to single-parameter monitoring, this method integrates multiple operating parameters for collaborative analysis, improving the accuracy and comprehensiveness of abnormality detection.

[0036] Specifically, see Figure 2 In another embodiment, the monitoring method further comprises: S21: Obtain the current condensing temperature and evaporating temperature of the chiller.

[0037] S22: Calculate the compressor current value and exhaust temperature of the chiller based on the condensing temperature, the evaporating temperature, and two sets of preset calculation parameters.

[0038] S23: Calculate the exhaust gas superheat based on the condensing temperature and the exhaust gas temperature.

[0039] S24: Calculating the measured exhaust gas superheat based on the condensing temperature and the exhaust gas temperature detection values.

[0040] S25: Determine whether the deviation between the compressor current value and the set compressor current standard value or the compressor current detection value obtained by the compressor current sensor is greater than a preset first threshold value. If so, jump to step S28; if not, jump to step S26. The setting of the compressor current standard value and the first threshold value is consistent with the above embodiment and will not be repeated here.

[0041] S26: Determine whether the deviation between the exhaust temperature and a set exhaust temperature standard value or an exhaust temperature detection value obtained by the exhaust temperature sensor is greater than a preset second threshold. If so, the process proceeds to step S28; if not, the process proceeds to step S27. The settings of the exhaust temperature standard value and the second threshold are consistent with those in the above embodiment and are not further described here.

[0042] S27: Determine whether the deviation between the exhaust superheat and the set exhaust superheat standard value or the measured exhaust superheat is greater than a preset third threshold. If so, jump to step S28; if not, jump to step S21.

[0043] The standard exhaust superheat value is a preset fixed value. The third threshold can be set to 5% of the standard exhaust superheat value or the measured exhaust superheat value. This 5% is not a specific limit; technicians can adjust the third threshold by increasing or decreasing the 5% based on actual conditions. Preferably, the third threshold can be divided into two sub-third thresholds, corresponding to the standard exhaust superheat value or the measured exhaust superheat value. By comparing the sub-third thresholds with the corresponding sub-third thresholds, more accurate abnormality detection can be performed, thereby improving monitoring accuracy.

[0044] S28: The chiller issues an abnormality alarm. After receiving the abnormality alarm from the chiller, the operation and maintenance personnel immediately conduct an inspection for the abnormality of the chiller.

[0045] The calculation formulas for exhaust superheat and measured exhaust superheat are:

[0046] in, is the condensation temperature, is the exhaust temperature or exhaust temperature detection value, is the exhaust gas superheat or the measured exhaust gas superheat. When is the exhaust temperature, is the exhaust superheat, when When the exhaust temperature is detected, To measure the exhaust superheat.

[0047] Specifically, see Figure 3 As shown, in another embodiment, the monitoring method further includes: S31: Obtain the current condensing temperature and evaporating temperature of the chiller.

[0048] S32: Based on the condensing temperature, the evaporating temperature, and three sets of preset calculation parameters, the compressor current value, the exhaust temperature, and the mass flow rate of the chiller are calculated. The three sets of calculation parameters correspond to the compressor current value, the exhaust temperature, and the mass flow rate, respectively.

[0049] S33: Calculate the exhaust gas superheat based on the condensing temperature and the exhaust gas temperature.

[0050] S34: Calculate the actual exhaust gas superheat based on the condensing temperature and the exhaust gas temperature detection values.

[0051] S35: Calculating the intake flow rate of the chiller based on the mass flow rate. It should be noted that the mass flow rate is the mass of fluid passing through the pipeline per unit time, and the intake flow rate is the flow velocity of the fluid in the intake pipeline. The intake flow rate can be calculated based on the mass flow rate, the density of the refrigerant medium, and the cross-sectional area of the intake pipeline. Calculating the intake flow rate is well-known to those skilled in the art and will not be explained or calculated in detail here.

[0052] S36: Determine whether the deviation between the compressor current value and the set compressor current standard value or the compressor current detection value obtained by the compressor current sensor is greater than a preset first threshold value. If so, jump to step S311; if not, jump to step S37. The setting of the compressor current standard value and the first threshold value is consistent with the above embodiment and will not be repeated here.

[0053] S37: Determine whether the deviation between the exhaust temperature and a set exhaust temperature standard value or an exhaust temperature detection value obtained by the exhaust temperature sensor is greater than a preset second threshold. If so, the process jumps to step S311; if not, the process jumps to step S38. The settings of the exhaust temperature standard value and the second threshold are consistent with those in the above embodiment and are not further described here.

[0054] S38: Determine whether the deviation between the exhaust superheat and the set exhaust superheat standard value or the measured exhaust superheat is greater than a preset third threshold. If so, jump to step S311; if not, jump to step S39. The settings of the exhaust superheat standard value and the third threshold are consistent with those in the above embodiment and are not further described here.

[0055] S39: Determine whether the inhalation flow rate is less than the first inhalation flow rate standard value and whether the duration is greater than a preset first duration. If so, jump to step S311; if not, jump to step S310. The first inhalation flow rate standard value is a fixed value. When the inhalation flow rate is less than the first inhalation flow rate standard value and the duration is greater than the first duration, it can be indirectly determined that the low pressure has fallen below the preset low pressure value, thereby affecting the oil return of the chiller. In this embodiment, when the inhalation flow rate is less than 6 m / s for the first duration, it indicates that the inhalation flow rate is too low, affecting the oil return. The first inhalation flow rate standard value and the first duration are not limited and can be set according to the specific chiller and application site.

[0056] S310: Determine whether the inhalation flow rate exceeds the second inhalation flow rate standard value and lasts longer than a preset second duration. If so, the process proceeds to step S310; if not, the process proceeds to step S31. The second inhalation flow rate standard value is 16 m / s. If the inhalation flow rate exceeds the second inhalation flow rate standard value for the second duration, the flow rate is considered excessively high, resulting in excessive unit noise. In this embodiment, the second inhalation flow rate standard value and the second duration are not limited and can be set based on the specific chiller and application site.

[0057] S311: The chiller issues an abnormality alarm. Upon receiving the chiller abnormality alarm, the operation and maintenance personnel immediately conduct an abnormality inspection of the chiller.

[0058] In this embodiment, mass flow and suction flow velocity are difficult to directly detect and calculate during actual operation. This monitoring method allows for direct calculation of mass flow using the calculation parameters corresponding to mass flow, evaporation temperature, and condensation temperature. This calculation then yields the suction flow velocity. The suction flow velocity can be used to infer the oil return within the chiller piping and the noise level during chiller operation.

[0059] Specifically, in the above-mentioned embodiment, the compressor current, exhaust temperature, mass flow rate, cooling capacity and compressor power are calculated based on the following formula:

[0060] in, is compressor current, exhaust temperature, mass flow, cooling capacity or compressor power, To calculate the compressor current, exhaust temperature, mass flow, cooling capacity or compressor power, the corresponding groups of calculation parameters are: Indicates the coefficients, is the evaporation temperature, is the condensation temperature.

[0061] The values of each group of calculation parameters corresponding to the compressor current, exhaust temperature or mass flow are shown in the following table: Table 1 Calculation parameter details

[0062] Substituting the calculation parameters in Table 1, along with the current evaporating and condensing temperatures, into the above formula, the current compressor current, exhaust temperature, mass flow rate, cooling capacity, or compressor power can be calculated. In this embodiment, the formula is not limited to calculating compressor current, exhaust temperature, mass flow rate, cooling capacity, or compressor power; it can also calculate multiple operating condition data during the chiller's operation (such as the chiller's theoretical instantaneous cooling / heating capacity). This data can be directly calculated from only the evaporating and exhaust temperatures, providing instantaneous information and displaying it directly on the chiller's touchscreen. This allows users to promptly monitor the unit's operation and any anomalies without requiring the addition of redundant testing equipment, thereby reducing the chiller's manufacturing cost and improving the customer experience with the chiller.

[0063] In actual applications, cooling capacity = chilled water inlet and outlet temperature difference × flow rate × water density × specific heat capacity. Cooling capacity detection requires adding a full set of relatively accurate inlet and outlet water temperature and flow sensors. Direct detection of the suction flow rate also requires an accurate flow rate sensor, which will further increase the manufacturing cost of the chiller. At the same time, the mass flow rate is difficult to detect directly in the chiller. By calculating through the above calculation formula, a relatively accurate cooling capacity and mass flow rate can be directly obtained. The chiller does not need to add a full set of detection equipment to obtain the specific values of status parameters such as cooling capacity and mass flow rate, thereby reducing the cost of the chiller.

[0064] Specifically, see Figure 4 As shown, the monitoring method further includes a regulating method for regulating the performance of the chiller, the regulating method comprising: S41: Calculation is performed based on preset calculation parameters corresponding to the cooling capacity and compressor power, the current evaporation temperature, and the current condensation temperature to obtain the current cooling capacity and compressor power of the chiller.

[0065] S42: Obtain the operating power of the fan of the current chiller, and perform calculation based on the fan operating power, cooling capacity, and compressor power to obtain a coefficient of performance.

[0066] Among them, if the chiller is an air-cooled unit, the performance coefficient = cooling capacity / (compressor power + fan operating power); if it is a water-cooled unit, the performance coefficient = cooling capacity / (compressor power + fan operating power + cooling water pump power + chilled water pump power).

[0067] S43: Adjust the operating state of the chiller based on the performance coefficient.

[0068] Taking an air-cooled chiller as an example, when the chiller is running in cooling mode and stabilizes, calculate the chiller's coefficient of performance (COP). Then, try reducing the fan frequency by 1 Hz. After stabilization for 1 minute, calculate the chiller's COP again. If the COP after adjusting the fan's operating power is greater than the COP before adjustment, then the adjustment is effective and the next cycle of frequency reduction attempts can be continued. If, after adjusting the fan's operating power, the chiller's COP is less than the COP before adjustment, then the adjustment is ineffective and the fan's operating power needs to be adjusted back to the previous value. This method of trial and error can be used to adjust the chiller's performance to the optimal state.

[0069] The present invention also discloses a safety monitoring system for a chiller, which operates based on the safety monitoring method for the chiller as described above.

[0070] The present invention also discloses another safety monitoring system for a chiller, which includes one or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and are configured to be executed by the one or more processors, and the program includes instructions for executing the safety monitoring method for the chiller as described above. The processor can adopt a general central processing unit (CPU), a microprocessor, an application specific integrated circuit (ASIC), or one or more integrated circuits for executing relevant programs to implement the functions required to be executed by the module in the safety monitoring system for the chiller of an embodiment of the present application, or to execute the safety monitoring method for the chiller of an embodiment of the method of the present application.

[0071] The present invention also discloses a computer-readable storage medium, which includes a computer program, and the computer program can be executed by a processor to complete the safety monitoring method of the chiller as described above. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more available media. The available medium can be a read-only memory (ROM), or a random access memory (RAM), or a magnetic medium, such as a floppy disk, a hard disk, a tape, a magnetic disk, or an optical medium, such as a digital versatile disc (DVD), or a semiconductor medium, such as a solid state disk (SSD).

[0072] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope of the present invention.

Claims

1. A safety monitoring method for a chiller, characterized in that: include: Get the current condensing temperature and evaporating temperature of the chiller; Calculating a compressor current value and an exhaust temperature of the chiller based on the condensing temperature, the evaporating temperature, and two sets of preset calculation parameters, wherein the two sets of calculation parameters correspond to the compressor current value and the exhaust temperature, respectively; When the chiller meets any of the following conditions, an abnormal alarm is issued; The first condition is that the deviation between the compressor current value and the set compressor current standard value or the compressor current detection value obtained by the compressor current sensor is greater than a preset first threshold value; The second condition is that a deviation between the exhaust temperature and a set exhaust temperature standard value or an exhaust temperature detection value obtained by the exhaust temperature sensor is greater than a preset second threshold value.

2. The safety monitoring method for a chiller according to claim 1, characterized in that: The compressor current value and the exhaust temperature are calculated based on the following formula: in, is the compressor current or the exhaust gas temperature, For calculating the compressor current or the exhaust temperature, the corresponding groups of calculation parameters are: Indicates the coefficients, is the evaporation temperature, is the condensation temperature.

3. The safety monitoring method for a chiller according to claim 1, characterized in that: The monitoring method further comprises: calculating exhaust gas superheat based on the condensing temperature and the exhaust gas temperature; Calculating based on the condensing temperature and the exhaust gas temperature detection value to obtain a measured exhaust gas superheat; When the chiller meets any one of the first condition, the second condition and the following third condition, an abnormality alarm is issued; The third condition is that a deviation between the exhaust superheat and a set exhaust superheat standard value or the actually measured exhaust superheat is greater than a preset third threshold.

4. The safety monitoring method for a chiller according to claim 3, characterized in that: The calculation formulas for the exhaust gas superheat and the measured exhaust gas superheat are: in, is the condensation temperature, is the exhaust temperature or the exhaust temperature detection value, is the exhaust gas superheat or the measured exhaust gas superheat, when When is the exhaust temperature, is the exhaust gas superheat, when When is the exhaust temperature detection value, is the measured exhaust gas superheat.

5. The safety monitoring method for a chiller according to claim 1, characterized in that: The monitoring method further comprises: Calculating a mass flow rate of the chiller based on the condensing temperature and the evaporating temperature; calculating a suction flow rate of the chiller based on the mass flow rate; When the chiller meets any one of the first condition, the second condition and the fourth condition described below, an abnormality alarm is issued; The fourth condition is that the inspiratory flow rate is less than a preset first inspiratory flow rate standard value and the duration thereof is greater than a preset first duration.

6. The safety monitoring method for a chiller according to claim 5, characterized in that: The mass flow rate is calculated based on the following formula: in, is the mass flow rate, is the calculation parameter corresponding to the mass flow rate, Indicates the coefficients, is the evaporation temperature, is the condensation temperature.

7. The safety monitoring method for a chiller according to claim 5, characterized in that: The monitoring method further includes a fifth condition, when the chiller meets any one of the first condition, the second condition, the fourth condition and the fifth condition described below, an abnormality alarm is issued; The fifth condition is that the inspiratory flow rate is greater than a preset second inspiratory flow rate standard value and the duration thereof is greater than a preset second duration.

8. The safety monitoring method for a chiller according to claim 1, characterized in that: Also included is a method for adjusting the performance of the chiller, the method comprising: Calculating based on the preset calculation parameters corresponding to the cooling capacity and the compressor power, the current evaporation temperature, and the current condensation temperature to obtain the current cooling capacity and the compressor power of the chiller; Obtaining the current operating power of the fan of the chiller, and performing calculation based on the fan operating power, the cooling capacity, and the compressor power to obtain a coefficient of performance; An operating state of the chiller is adjusted based on the coefficient of performance.

9. The safety monitoring method for a chiller according to claim 8, characterized in that: The cooling capacity and the compressor power are calculated based on the following formula: in, is the cooling capacity or the compressor power, For calculating the cooling capacity or the compressor power, the corresponding groups of calculation parameters are: Indicates the coefficients, is the evaporation temperature, is the condensation temperature.

10. A safety monitoring system for a chiller, characterized in that: The safety monitoring system of the chiller operates based on the monitoring method according to any one of claims 1 to 9.

11. A safety monitoring system for a chiller, characterized in that: include: one or more processors; Memory; and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the programs comprising instructions for executing the monitoring method according to any one of claims 1 to 9.

12. A computer-readable storage medium, characterized in that The invention comprises a computer program, wherein the computer program can be executed by a processor to implement the monitoring method according to any one of claims 1 to 9.

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