Evaporative cooling central air conditioning air flow distribution control system based on energy efficiency optimization

Abstract

The present invention belongs to the technical field of central air-conditioning control, specifically an evaporative cooling central air-conditioning air-flow distribution and control system based on energy efficiency optimization, including an allocation space acquisition unit, a heat load zone dynamic division unit, an air-flow distribution and control unit, a monitoring and evaluation unit and a central air-conditioning monitoring center; the present invention reasonably judges the personnel residence status of each space area through the heat load zone dynamic division unit and provides decision-making information support for the automatic control of the air-flow distribution and control unit; the air-flow distribution and control unit performs air-flow delivery control and air-supply angle control on all space areas based on classification marking information; the monitoring and evaluation unit analyzes the air-supply control performance of the corresponding space area, conducts cause investigation and analysis when an abnormal air-supply control signal is generated and takes corresponding improvement measures, which is conducive to ensuring the cooling control effect for each space area and realizing energy efficiency optimization, and has a high level of intelligence and automation.

Description

Technical Field

[0001] The present invention relates to the technical field of central air-conditioning control, and in particular to an evaporative cooling central air-conditioning air flow distribution control system based on energy efficiency optimization. Background Art

[0002] Evaporative cooling central air conditioning is an energy-saving air conditioning system that uses the principle of water evaporation to absorb heat. Its core is to achieve cooling through the heat and moisture exchange between water and air. Water is sprayed onto the cooling medium to form a water film, which uses the latent heat of evaporation to absorb heat from the air, thereby reducing the air temperature. It does not require the complex refrigeration cycle of traditional compression air conditioning.

[0003] Currently, fixed air volume or simple zone control is commonly used to distribute airflow in evaporative cooling central air conditioners. This makes it impossible to adjust airflow distribution based on real-time load changes, which can easily lead to overcooling or overheating in some areas. This is not conducive to ensuring the cooling control effect in each area and achieving energy efficiency optimization. Furthermore, it is impossible to effectively monitor the airflow distribution control process and accurately evaluate the air supply control performance, making it difficult for managers to make timely improvement measures. Consequently, the level of intelligence and automation is low.

[0004] In view of the above technical defects, a solution is now proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide an evaporative cooling central air-conditioning air flow distribution and control system based on energy efficiency optimization, which solves the problem that the existing technology cannot adjust the air flow distribution according to real-time load changes, which easily leads to overcooling or overheating in local areas, is not conducive to ensuring the cooling control effect of each area and achieving energy efficiency optimization, and is unable to effectively monitor the air flow distribution control process and accurately evaluate the air supply control performance, and has a low level of intelligence and automation.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] An evaporative cooling central air conditioning airflow distribution and control system based on energy efficiency optimization includes an allocation space acquisition unit, a heat load zone dynamic division unit, an airflow distribution control unit, a monitoring and evaluation unit, and a central air conditioning monitoring center. The allocation space acquisition unit obtains several spatial areas where the evaporative cooling central air conditioning performs airflow distribution and marks the corresponding spatial areas as heat load zones i, where i is a natural number greater than 1. The heat load zone dynamic division unit marks heat load zone i as zone A, zone B, or zone C through personnel flow monitoring and analysis, and sends the classification and marking information of heat load zone i to the airflow distribution control unit and the central air conditioning monitoring center.

[0008] The airflow distribution control unit performs airflow delivery control and air outlet angle control on all spatial areas based on the classification tag information, and sends the control information to the central air-conditioning monitoring center and the monitoring and evaluation unit; the monitoring and evaluation unit analyzes the air supply control performance of the heat load zone i, and generates an air supply control qualified signal or an air supply control abnormal signal for the heat load zone i through analysis, and sends the air supply control qualified signal or the air supply control abnormal signal for the heat load zone i to the central air-conditioning monitoring center.

[0009] Furthermore, the specific analysis process of personnel flow monitoring and analysis is as follows:

[0010] Obtain the real-time number of people staying in heat load zone i and calculate the ratio between it and the area of ​​heat load zone i to obtain the personnel retention value. Compare the personnel retention value with the preset personnel retention threshold. If the personnel retention value exceeds the preset personnel retention threshold, it is determined that heat load zone i is in a personnel gathering state.

[0011] The load zone classification coefficient of heat load zone i is obtained through analysis, and the load zone classification coefficient is numerically compared with the preset load zone classification coefficient range. If the load zone classification coefficient exceeds the maximum value of the preset load zone classification coefficient range, the heat load zone i is marked as zone A; if the load zone classification coefficient is within the preset load zone classification coefficient range, the heat load zone i is marked as zone B; if the load zone classification coefficient does not exceed the minimum value of the preset load zone classification coefficient range, the heat load zone i is marked as zone C.

[0012] Furthermore, the specific analysis and acquisition method of the load zone classification coefficient is as follows:

[0013] The total duration of the personnel gathering state in heat load zone i per unit time is obtained and marked as the gathering detection value, and the average and maximum values ​​of the personnel residence values ​​in heat load zone i per unit time are marked as the residence performance value and the residence table amplitude, respectively; the load zone classification coefficient is calculated by weighted summation of the gathering detection value, the residence performance value and the residence table amplitude.

[0014] Furthermore, the specific control strategy of the airflow distribution control unit for airflow delivery control and air outlet angle control is as follows:

[0015] The air supply volume per unit volume of areas A, B and C decreases, and the upward inclination angles of the air supply outlets of areas A, B and C decreases.

[0016] Furthermore, the specific analysis process of the monitoring and evaluation unit includes:

[0017] Obtain all air outlets distributed in heat load zone i, mark the execution deviation value of the upward tilt angle of the corresponding air outlet as an upward tilt abnormal value, and obtain the execution deviation value of the real-time air supply volume of the corresponding air outlet and mark it as the air supply control deviation value, compare the upward tilt abnormal value and the air supply control deviation value with the preset upward tilt abnormal threshold and the preset air supply control deviation threshold respectively, and if the upward tilt abnormal value or the air supply control deviation value exceeds the corresponding preset threshold, it is determined that the corresponding air outlet is in the air supply control abnormal state;

[0018] The analysis is used to determine whether there is an abnormally controlled air supply outlet in the heat load zone i within a unit time. If there is an abnormally controlled air supply outlet in the heat load zone i, an abnormal air supply control signal for the heat load zone i is generated.

[0019] Furthermore, the analysis and judgment method of the abnormal air outlet is as follows:

[0020] Obtain the total time duration of the corresponding air outlet in the air supply control abnormality state per unit time and mark it as the air supply control abnormality time condition value. Compare the air supply control abnormality time condition value with the preset air supply control abnormality time condition threshold. If the air supply control abnormality time condition value exceeds the preset air supply control abnormality time condition threshold, mark the corresponding air outlet as an abnormally controlled air outlet.

[0021] If the air supply control abnormal condition value does not exceed the preset air supply control abnormal condition threshold, the average value of the upward slope abnormal value and the average value of the air supply control deviation value corresponding to the corresponding air supply outlet within unit time are marked as upward slope non-optimal value and air supply non-optimal value respectively. The monitoring evaluation coefficient is obtained by weighted summing up the air supply control abnormal condition value, the upward slope non-optimal value and the air supply non-optimal value. The monitoring evaluation coefficient is numerically compared with the preset monitoring evaluation coefficient threshold. If the monitoring evaluation coefficient exceeds the preset monitoring evaluation coefficient threshold, the corresponding air supply outlet is marked as an abnormally controlled air supply outlet.

[0022] Furthermore, if there are no abnormally controlled air outlets in the heat load zone i, several detection time points are set within a unit time, and the proportion of the number of air outlets in the heat load zone i that are in the abnormal air supply control state at the corresponding detection time point is marked as the coordination abnormality percentage value. The coordination abnormality percentage value is numerically compared with the preset coordination abnormality percentage threshold value. If the coordination abnormality percentage value exceeds the preset coordination abnormality percentage threshold value, the corresponding detection time point is marked as a coordination abnormality time point;

[0023] The number of coordination anomaly time points corresponding to heat load zone i in unit time is collected and the ratio is calculated with the total number of detection time points to obtain the coordination anomaly detection value, and the coordination anomaly detection value is numerically compared with the preset coordination anomaly detection threshold. If the coordination anomaly detection value exceeds the preset coordination anomaly detection threshold, an abnormal air supply control signal for heat load zone i is generated; if the coordination anomaly detection value does not exceed the preset coordination anomaly detection threshold, a qualified air supply control signal for heat load zone i is generated.

[0024] Furthermore, the monitoring and evaluation unit is communicatively connected to the evaporative cooling central air conditioning diagnostic unit, and the monitoring and evaluation unit sends the air supply control qualified signal to the evaporative cooling central air conditioning diagnostic unit. When the evaporative cooling central air conditioning diagnostic unit receives the air supply control qualified signal, it analyzes the abnormal operating performance of the evaporative cooling central air conditioning, generates a diagnostic alarm signal or a diagnostic qualified signal through analysis, and sends the diagnostic alarm signal or the diagnostic qualified signal to the central air conditioning monitoring center.

[0025] Furthermore, the specific analysis process of the evaporative cooling central air conditioning diagnostic unit is as follows:

[0026] Collect the operating parameters that need to be monitored during the operation of the evaporative cooling central air conditioner, monitor the real-time operating data of the corresponding operating parameters, and determine that the corresponding operating parameters are in a diagnostic questionable state when the real-time operating data of the corresponding operating parameters do not meet the current corresponding preset data requirements;

[0027] Obtain the total duration of the corresponding operating parameter in the diagnostic questionable state within a unit time and mark it as the questionable duration detection value, and mark the maximum deviation value of the real-time operating data of the corresponding operating parameter within the unit time compared with the corresponding data data requirement as the parameter risk value. Perform a weighted sum calculation on the questionable duration detection value and the parameter risk value to obtain a parameter characteristic value. Perform a numerical comparison on the parameter characteristic value with the corresponding preset parameter characteristic threshold. If the parameter characteristic value exceeds the corresponding preset parameter characteristic threshold, mark the corresponding operating parameter as an abnormal object.

[0028] If an abnormal object exists during the operation of the evaporative cooling central air conditioner, a diagnostic alarm signal is generated.

[0029] Furthermore, if there are no abnormal objects during the operation of the evaporative cooling central air conditioner, the parameter characteristic value of the corresponding operating parameter is compared with the corresponding preset parameter characteristic threshold value to obtain a parameter comparison value, and each operating parameter is set to correspond to a set of preset operating relevance weight values. The parameter comparison value of the corresponding operating parameter is multiplied by the corresponding preset operating relevance weight value, and the product result is marked as the parameter relevance value of the corresponding operating parameter;

[0030] The parameter correlation values ​​of all operating parameters are obtained and summed up to obtain the diagnostic performance coefficient, and the diagnostic performance coefficient is numerically compared with the preset diagnostic performance coefficient threshold. If the diagnostic performance coefficient exceeds the preset diagnostic performance coefficient threshold, a diagnostic alarm signal is generated; if the diagnostic performance coefficient does not exceed the preset diagnostic performance coefficient threshold, a diagnostic qualification signal is generated.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] 1. In the present invention, the dynamic division unit of heat load zones rationally determines the occupancy status of each spatial area and implements regional classification. The airflow distribution and control unit controls airflow delivery and air outlet angles in all spatial areas based on the classification tag information. The monitoring and evaluation unit analyzes the air supply control performance of the corresponding spatial area. When an abnormal air supply control signal is generated, the cause is investigated and analyzed, and corresponding improvement measures are taken. This is conducive to ensuring the cooling control effect for each spatial area and achieving energy efficiency optimization, with a high level of intelligence and automation.

[0033] 2. In the present invention, the air supply control qualified signal is sent to the evaporative cooling central air-conditioning diagnostic unit through the monitoring and evaluation unit. When the evaporative cooling central air-conditioning diagnostic unit receives the air supply control qualified signal, it analyzes the abnormal operation performance of the evaporative cooling central air-conditioning, and takes reasonable inspection and maintenance measures for the evaporative cooling central air-conditioning when generating a diagnostic alarm signal, thereby ensuring the stable operation of the evaporative cooling central air-conditioning, improving its operation effect and operation safety, and significantly reducing the difficulty of operation supervision of the evaporative cooling central air-conditioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings;

[0035] Figure 1 This is a system block diagram of Embodiment 1 of the present invention;

[0036] Figure 2 This is a system block diagram of Example 2 of the present invention. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] Example 1: Figure 1 As shown, the evaporative cooling central air conditioning air flow distribution control system based on energy efficiency optimization proposed in the present invention includes an allocation space acquisition unit, a heat load zone dynamic division unit, an air flow distribution control unit, a monitoring and evaluation unit, and a central air conditioning monitoring center. The allocation space acquisition unit obtains several spatial areas (mainly offices) for air flow distribution by the evaporative cooling central air conditioning and marks the corresponding spatial areas as heat load zones i, where i is a natural number greater than 1.

[0039] The dynamic heat load zone division unit labels heat load zone i as zone A, zone B, or zone C through personnel flow monitoring and analysis, and sends the classification and labeling information of heat load zone i to the air flow distribution control unit and the central air conditioning monitoring center. This unit can reasonably determine the personnel residence status of each space area and provide decision-making information support for the automated control of the air flow distribution control unit, ensuring its control effect and achieving energy efficiency optimization. The specific analysis process of personnel flow monitoring and analysis is as follows:

[0040] The real-time number of people staying in heat load zone i is obtained and the ratio of this to the area of ​​heat load zone i is calculated to obtain the personnel retention value. The personnel retention value is then compared with the preset personnel retention threshold. If the personnel retention value exceeds the preset personnel retention threshold, it indicates that the personnel in heat load zone i are densely populated, and heat load zone i is judged to be in a personnel gathering state.

[0041] Obtain the total time that heat load zone i is in a gathering state per unit time and mark it as the gathering detection value, and mark the average and maximum values ​​of the personnel residence values ​​of heat load zone i per unit time as the residence performance value and residence amplitude, respectively;

[0042] The load zone classification coefficient is calculated by taking a weighted sum of the aggregation detection value, the residence performance value, and the residence table amplitude. The aggregation detection value, the residence performance value, and the residence table amplitude are each assigned a corresponding preset weight coefficient, and the aggregation detection value, the residence performance value, and the residence table amplitude are multiplied by the corresponding preset weight coefficients. The sum of the three sets of product results is marked as the load zone classification coefficient. Furthermore, the larger the value of the load zone classification coefficient, the more active the occupants in heat load zone i are, and the greater the need to ensure its cooling control effect to improve the comfort of the area.

[0043] The load zone classification coefficient is numerically compared with the preset load zone classification coefficient range. If the load zone classification coefficient exceeds the maximum value of the preset load zone classification coefficient range, it indicates that the personnel activity in heat load zone i is extremely high, and the heat load zone i is marked as zone A; if the load zone classification coefficient is within the preset load zone classification coefficient range, it indicates that the personnel activity in heat load zone i is high, and the heat load zone i is marked as zone B; if the load zone classification coefficient does not exceed the minimum value of the preset load zone classification coefficient range, it indicates that the personnel activity in heat load zone i is low, and the heat load zone i is marked as zone C.

[0044] The airflow distribution control unit controls the airflow delivery and air outlet angles of all spatial areas based on the classification tag information. The unit volume air supply of areas A, B and C (i.e., the ratio of the real-time total air supply volume of the corresponding spatial area to the volume of the corresponding spatial area) decreases (i.e., the unit volume air supply of area A > area B > area C), and the upward inclination angles of the air outlets in areas A, B and C decrease (i.e., the upward inclination angles of the air outlets in area A > area B > area C, to avoid direct blowing onto personnel). The control information is sent to the central air-conditioning monitoring center and the monitoring and evaluation unit, which is conducive to improving the cooling control effect for each spatial area and achieving energy efficiency optimization, with a high level of intelligence and automation.

[0045] The monitoring and evaluation unit analyzes the air supply control performance of heat load zone i, generates an air supply control qualified signal or an air supply control abnormal signal for heat load zone i through analysis, and sends the air supply control qualified signal or air supply control abnormal signal for heat load zone i to the central air conditioning monitoring center;

[0046] When the central air conditioning monitoring center receives an abnormal air supply control signal, it issues a corresponding warning to remind back-end supervisors to investigate and analyze the cause and take corresponding improvement measures. This significantly reduces the difficulty of supervising the air distribution control process and improves the response efficiency of back-end supervisors, further ensuring the cooling control effect for each space area. The specific analysis process of the monitoring and evaluation unit is as follows:

[0047] Obtain all air outlets distributed in heat load zone i, mark the execution deviation value of the upward tilt angle of the corresponding air outlet as an upward tilt abnormal value, and obtain the execution deviation value of the real-time air supply volume of the corresponding air outlet and mark it as the air supply control deviation value, and compare the upward tilt abnormal value and the air supply control deviation value with the preset upward tilt abnormal threshold and the preset air supply control deviation threshold respectively. If the upward tilt abnormal value or the air supply control deviation value exceeds the corresponding preset threshold, it indicates that the air supply control performance of the corresponding air outlet within a unit time is poor, and then the corresponding air outlet is judged to be in an air supply control abnormal state;

[0048] Obtain the total length of time that the corresponding air outlet is in the air supply control abnormal state within a unit time and mark it as the air supply control abnormality time condition value, compare the air supply control abnormality time condition value with the preset air supply control abnormality time condition threshold, and if the air supply control abnormality time condition value exceeds the preset air supply control abnormality time condition threshold, mark the corresponding air outlet as an abnormally controlled air outlet; if the air supply control abnormality time condition value does not exceed the preset air supply control abnormality time condition threshold, mark the average value of the upward abnormal value and the average value of the air supply control deviation value corresponding to the corresponding air outlet within the unit time as the upward abnormal value and the air supply non-optimal value, respectively;

[0049] The monitoring and evaluation coefficient is calculated by weighted summing the air supply control abnormality time value, the upward slope non-optimal value, and the air supply non-optimal value; the air supply control abnormality time value, the upward slope non-optimal value, and the air supply non-optimal value are respectively assigned corresponding preset weight coefficients, and the air supply control abnormality time value, the upward slope non-optimal value, and the air supply non-optimal value are respectively multiplied by the corresponding preset weight coefficients, and the sum of the three sets of product results is marked as the monitoring and evaluation coefficient; and the larger the value of the monitoring and evaluation coefficient, the worse the air supply control performance for the corresponding air outlet per unit time is.

[0050] The monitoring and evaluation coefficient is numerically compared with the preset monitoring and evaluation coefficient threshold. If the monitoring and evaluation coefficient exceeds the preset monitoring and evaluation coefficient threshold, it indicates that the air supply control performance of the corresponding air supply outlet in unit time is generally poor, and the corresponding air supply outlet is marked as an abnormally controlled air supply outlet. If there is an abnormally controlled air supply outlet in heat load zone i, it indicates that there is an abnormality in the air supply control for heat load zone i, and an abnormal air supply control signal is generated for heat load zone i.

[0051] Furthermore, if there are no abnormally controlled air outlets in the heat load zone i, a number of detection time points are set within a unit time, and the proportion of the number of air outlets in the air supply abnormality control state in the heat load zone i at the corresponding detection time point is marked as the coordination abnormality percentage value, and the coordination abnormality percentage value is numerically compared with the preset coordination abnormality percentage threshold value. If the coordination abnormality percentage value exceeds the preset coordination abnormality percentage threshold value, it indicates that the overall air supply condition for the heat load zone i at the corresponding detection time point is not good, and the corresponding detection time point is marked as a coordination abnormality time point;

[0052] The number of coordination anomaly time points corresponding to heat load zone i in unit time is collected and the ratio is calculated with the total number of detection time points to obtain the coordination anomaly detection value, and the coordination anomaly detection value is numerically compared with the preset coordination anomaly detection threshold. If the coordination anomaly detection value exceeds the preset coordination anomaly detection threshold, it indicates that the air supply control for heat load zone i needs to be optimized and strengthened, and an air supply control anomaly signal for heat load zone i is generated; if the coordination anomaly detection value does not exceed the preset coordination anomaly detection threshold, it indicates that the air supply control for heat load zone i is relatively accurate, and a qualified air supply control signal for heat load zone i is generated.

[0053] Example 2: Figure 2 As shown, the difference between this embodiment and the first embodiment is that the monitoring and evaluation unit is communicatively connected to the evaporative cooling central air conditioning diagnosis unit. The monitoring and evaluation unit sends the air supply control qualified signal to the evaporative cooling central air conditioning diagnosis unit. When the evaporative cooling central air conditioning diagnosis unit receives the air supply control qualified signal, it analyzes the abnormal operation performance of the evaporative cooling central air conditioning.

[0054] The diagnostic alarm signal or diagnostic pass signal is generated through analysis and sent to the central air conditioning monitoring center. When the central air conditioning monitoring center receives the diagnostic alarm signal, it issues a corresponding warning to remind the back-end supervisor to take reasonable inspection and maintenance measures for the evaporative cooling central air conditioner in a timely manner, thereby ensuring the stable operation of the evaporative cooling central air conditioner and improving its operating effect and safety. The specific analysis process of the evaporative cooling central air conditioner diagnostic unit is as follows:

[0055] The operating parameters that need to be monitored during the operation of the evaporative cooling central air conditioner (such as fan speed, cooling water flow, evaporator surface temperature, etc.) are collected, and the real-time operating data of the corresponding operating parameters are monitored. When the real-time operating data of the corresponding operating parameters does not meet the current corresponding preset data requirements, it is determined that the corresponding operating parameters are in a diagnostic questionable state;

[0056] Obtain the total duration of the corresponding operating parameter in the diagnostic questionable state within a unit time and mark it as the questionable duration detection value, and mark the maximum deviation value of the real-time operating data of the corresponding operating parameter within the unit time compared with the corresponding data data requirement as the parameter risk value. Perform a weighted sum calculation on the questionable duration detection value and the parameter risk value to obtain a parameter characteristic value. Perform a numerical comparison on the parameter characteristic value with the corresponding preset parameter characteristic threshold. If the parameter characteristic value exceeds the corresponding preset parameter characteristic threshold, mark the corresponding operating parameter as an abnormal object.

[0057] If an abnormal object exists during the operation of the evaporative cooling central air conditioner, it indicates that there is a hidden danger in the operation of the evaporative cooling central air conditioner, and a diagnostic alarm signal is generated; if no abnormal object exists during the operation of the evaporative cooling central air conditioner, the parameter characteristic value of the corresponding operating parameter is compared with the corresponding preset parameter characteristic threshold value to obtain a parameter comparison value;

[0058] Each operating parameter is set to correspond to a set of preset operating relevance weight values, wherein the values ​​of the preset operating relevance weight values ​​are all positive numbers, and the more important the corresponding operating parameter is to the stable operation of the evaporative cooling central air conditioner, the larger the value of the preset operating relevance weight value corresponding to it is; the parameter ratio value of the corresponding operating parameter is multiplied by the corresponding preset operating relevance weight value, and the product result is marked as the parameter relevance value of the corresponding operating parameter;

[0059] The parameter correlation values ​​of all operating parameters are obtained and summed up to obtain the diagnostic performance coefficient, and the diagnostic performance coefficient is numerically compared with the preset diagnostic performance coefficient threshold. If the diagnostic performance coefficient exceeds the preset diagnostic performance coefficient threshold, it indicates that the overall operating condition of the evaporative cooling central air conditioner is poor, and a diagnostic alarm signal is generated; if the diagnostic performance coefficient does not exceed the preset diagnostic performance coefficient threshold, it indicates that the overall operating condition of the evaporative cooling central air conditioner is good, and a diagnostic pass signal is generated.

[0060] The working principle of the present invention is as follows: when in use, several spatial areas for airflow distribution of the evaporative cooling central air-conditioning are obtained by allocating the space acquisition unit, and the heat load zone dynamic division unit reasonably judges the personnel residence status of each spatial area through personnel flow monitoring and analysis, and provides decision-making information support for the automatic control of the airflow distribution control unit. The airflow distribution control unit performs airflow delivery control and air supply angle control on all spatial areas based on the classification mark information, which is beneficial to improve the cooling control effect of each spatial area and achieve energy efficiency optimization, and analyzes the air supply control performance of the corresponding spatial area through the monitoring and evaluation unit, and conducts cause investigation and analysis and takes corresponding improvement measures when an abnormal air supply control signal is generated, which significantly reduces the supervision difficulty of the airflow distribution control process and improves the response efficiency of the back-end supervisor, further ensures the cooling control effect of each spatial area, and has a high level of intelligence and automation.

[0061] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to specific embodiments. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An evaporative cooling central air conditioning air flow distribution control system based on energy efficiency optimization, characterized in that: It includes an allocation space acquisition unit, a heat load zone dynamic division unit, an airflow distribution control unit, a monitoring and evaluation unit, and a central air-conditioning monitoring center; the allocation space acquisition unit obtains several spatial areas where the evaporative cooling central air-conditioning performs airflow distribution, and marks the corresponding spatial area as a heat load zone i, where i is a natural number greater than 1; The heat load zone dynamic division unit marks heat load zone i as zone A, zone B, or zone C through personnel flow monitoring and analysis. The airflow distribution control unit controls airflow delivery and air outlet angles in all spatial areas based on the classification and labeling information. The monitoring and evaluation unit analyzes the air supply control performance of heat load zone i, and generates an air supply control qualified signal or air supply control abnormal signal for heat load zone i through analysis. The air supply control qualified signal or air supply control abnormal signal for heat load zone i is then sent to the central air conditioning monitoring center. The specific analysis process of the monitoring and evaluation unit includes: All air outlets distributed in heat load zone i are obtained. If the upward slope abnormal value or air supply control deviation value exceeds the corresponding preset threshold, the corresponding air outlet is determined to be in an abnormal air supply control state. Through analysis, it is determined whether there is an abnormal air supply control outlet in heat load zone i within a unit time. If there is an abnormal air supply control outlet in heat load zone i, an air supply control abnormality signal for heat load zone i is generated. The analysis and judgment methods for abnormal air supply outlets are as follows: If the air supply control abnormality value exceeds the preset air supply control abnormality threshold, the corresponding air supply outlet is marked as an abnormally controlled air supply outlet; if the air supply control abnormality value does not exceed the preset air supply control abnormality threshold, the monitoring evaluation coefficient is calculated by weighted summing the air supply control abnormality value, the upslope non-optimal value and the air supply non-optimal value. If the monitoring evaluation coefficient exceeds the preset monitoring evaluation coefficient threshold, the corresponding air supply outlet is marked as an abnormally controlled air supply outlet; The monitoring and evaluation unit is communicatively connected to the evaporative cooling central air-conditioning diagnostic unit. When the evaporative cooling central air-conditioning diagnostic unit receives the air supply control qualified signal, it analyzes the abnormal operation performance of the evaporative cooling central air-conditioning and sends the diagnostic alarm signal or the diagnostic qualified signal to the central air-conditioning monitoring center.

2. The evaporative cooling central air conditioning air flow distribution control system based on energy efficiency optimization according to claim 1 is characterized in that: The specific analysis process of personnel flow monitoring analysis is as follows: through analysis to obtain the load zone classification coefficient of heat load zone i, if the load zone classification coefficient exceeds the maximum value of the preset load zone classification coefficient range, the heat load zone i is marked as zone A; if the load zone classification coefficient is within the preset load zone classification coefficient range, the heat load zone i is marked as zone B; if the load zone classification coefficient does not exceed the minimum value of the preset load zone classification coefficient range, the heat load zone i is marked as zone C.

3. The evaporative cooling central air conditioning air flow distribution control system based on energy efficiency optimization according to claim 2 is characterized in that: The specific analysis and acquisition method of the load zone classification coefficient is as follows: The total duration of the personnel gathering state in heat load zone i per unit time is obtained and marked as the gathering detection value, and the average and maximum values ​​of the personnel residence values ​​in heat load zone i per unit time are marked as the residence performance value and the residence table amplitude, respectively; the load zone classification coefficient is calculated by weighted summation of the gathering detection value, the residence performance value and the residence table amplitude.

4. The evaporative cooling central air conditioning air flow distribution control system based on energy efficiency optimization according to claim 1 is characterized in that: The specific control strategy of the air flow distribution control unit for air flow delivery control and air supply outlet angle control is: the air supply volume per unit volume of areas A, B and C is gradually reduced, and the upward inclination angle of the air supply outlets in areas A, B and C is gradually reduced.

5. The evaporative cooling central air conditioning air flow distribution control system based on energy efficiency optimization according to claim 1 is characterized in that: If there is no abnormally controlled air supply outlet in heat load zone i, the number of coordination abnormality time points corresponding to heat load zone i in unit time is collected and the ratio is calculated with the total number of detection time points to obtain the coordination abnormality detection value. If the coordination abnormality detection value exceeds the preset coordination abnormality detection threshold, an abnormal air supply control signal of heat load zone i is generated; if the coordination abnormality detection value does not exceed the preset coordination abnormality detection threshold, a qualified air supply control signal of heat load zone i is generated.

6. The evaporative cooling central air conditioning air flow distribution control system based on energy efficiency optimization according to claim 1 is characterized in that: The specific analysis process of the evaporative cooling central air-conditioning diagnostic unit is as follows: the operating parameters that need to be monitored during the operation of the evaporative cooling central air-conditioning are collected, the real-time operating data of the corresponding operating parameters are monitored, and the parameter characteristic value is obtained by weighted summation of the doubtful duration detection value and the parameter risk value. If the parameter characteristic value exceeds the corresponding preset parameter characteristic threshold, the corresponding operating parameter is marked as an abnormal object; if an abnormal object exists during the operation of the evaporative cooling central air-conditioning, a diagnostic alarm signal is generated.

7. The evaporative cooling central air conditioning air flow distribution control system based on energy efficiency optimization according to claim 6 is characterized in that: If there are no abnormal objects during the operation of the evaporative cooling central air conditioner, the parameter correlation values ​​of all operating parameters are obtained and summed up to obtain the diagnostic performance coefficient. If the diagnostic performance coefficient exceeds the preset diagnostic performance coefficient threshold, a diagnostic alarm signal is generated; if the diagnostic performance coefficient does not exceed the preset diagnostic performance coefficient threshold, a diagnostic pass signal is generated.

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