Cooling tower group anomaly detection method and device, air handling equipment and medium

Abstract

The application discloses an abnormality detection method and device of a cooling tower group, an air treatment equipment and a medium. The cooling tower group comprises a plurality of parallel cooling towers, each of which comprises a fan. The method comprises the following steps: acquiring the fan current of each cooling tower; acquiring the air-water ratio of each cooling tower under the condition that the fan currents of the plurality of cooling towers are consistent; and performing abnormality detection on the water distribution of the plurality of cooling towers based on the air-water ratio of each cooling tower. Thus, the water distribution abnormality detection of the cooling tower group can be realized by acquiring the fan current and the air-water ratio of the cooling tower group, so that the energy-saving fault diagnosis of the cooling tower group can be realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air treatment equipment, and in particular to an abnormality detection method and device for a cooling tower group, air treatment equipment and a medium. BACKGROUND

[0002] Since the energy consumption of a central air conditioning system accounts for more than 40% of the building energy consumption, the energy saving of the central air conditioning system is of great significance to building energy saving, and the cooling tower group is an important part of the central air conditioning system, so the energy saving of the cooling tower group is crucial to the energy saving effect of the central air conditioning system.

[0003] In the related art, the safety faults of the cooling tower group are mainly diagnosed, such as excessive fan current, fan stall, and cooling water flow interruption, and there is a lack of energy saving fault diagnosis of the cooling tower group. SUMMARY

[0004] The present application aims to at least solve one of the technical problems in the related art. To this end, the purpose of the present application is to provide an abnormality detection method and device for a cooling tower group, air treatment equipment and a medium, by obtaining the fan current and the air-water ratio of the cooling tower group, the water distribution abnormality of the cooling tower group can be detected, and thus the energy saving fault diagnosis of the cooling tower group can be realized.

[0005] To achieve the above-mentioned purpose, the first aspect of the present application provides an abnormality detection method for a cooling tower group, the cooling tower group comprising a plurality of parallel cooling towers, each cooling tower comprising a fan, the method comprising: obtaining the fan current of each cooling tower; obtaining the air-water ratio of each cooling tower under the condition that the fan currents of the plurality of cooling towers are consistent; and performing abnormality detection on the water distribution of the plurality of cooling towers based on the air-water ratio of each cooling tower.

[0006] According to one embodiment of the present application, the air-water ratio of each cooling tower is obtained by: for any cooling tower, obtaining the air inlet enthalpy value, the air outlet enthalpy value, the cooling water inlet temperature and the cooling water outlet temperature of the cooling tower; obtaining the difference between the air outlet enthalpy value and the air inlet enthalpy value to obtain the air inlet and outlet enthalpy difference, and obtaining the difference between the cooling water outlet temperature and the cooling water inlet temperature to obtain the cooling water inlet and outlet temperature difference; and obtaining the ratio of the air inlet and outlet enthalpy difference to the cooling water inlet and outlet temperature difference to obtain the air-water ratio.

[0007] According to one embodiment of the present application, the air inlet enthalpy value and the air outlet enthalpy value of the cooling tower are obtained by: obtaining the air inlet temperature and the air inlet humidity of the cooling tower, and determining the air inlet enthalpy value according to the air inlet temperature and the air inlet humidity; and obtaining the air outlet temperature and the air outlet humidity of the cooling tower, and determining the air outlet enthalpy value according to the air outlet temperature and the air outlet humidity.

[0008] According to one embodiment of the present application, the water distribution of the plurality of cooling towers is detected for abnormality based on the air-water ratio of each cooling tower, including: in the case that the air-water ratios of the plurality of cooling towers are inconsistent, determining that the water distribution of the plurality of cooling towers is uneven, wherein the air-water ratio is inversely related to the water quantity.

[0009] According to one embodiment of the present application, the method further includes: in the case that the air-water ratios of the plurality of cooling towers are consistent, obtaining the air inlet and outlet wet bulb temperature difference or the cooling water inlet and outlet temperature difference of each cooling tower; and detecting the heat exchange efficiency of the plurality of cooling towers for abnormality based on the air inlet and outlet wet bulb temperature difference or the cooling water inlet and outlet temperature difference of each cooling tower.

[0010] According to one embodiment of the present application, the air inlet and outlet wet bulb temperature difference of each cooling tower is obtained, including: for any cooling tower, obtaining the air inlet temperature and the air inlet humidity of the cooling tower, and determining the air inlet wet bulb temperature based on the air inlet temperature and the air inlet humidity; obtaining the air outlet temperature and the air outlet humidity of the cooling tower, and determining the air outlet wet bulb temperature based on the air outlet temperature and the air outlet humidity; and obtaining the difference between the air outlet wet bulb temperature and the air inlet wet bulb temperature to obtain the air inlet and outlet wet bulb temperature difference.

[0011] According to one embodiment of the present application, the heat exchange efficiency of the plurality of cooling towers is detected for abnormality based on the air inlet and outlet wet bulb temperature difference or the cooling water inlet and outlet temperature difference of each cooling tower, including: in the case that the air inlet and outlet wet bulb temperature difference or the cooling water inlet and outlet temperature difference of the plurality of cooling towers is inconsistent, determining that the heat exchange efficiency of the cooling tower satisfying a preset condition is decreased.

[0012] According to one embodiment of the present application, each cooling tower further includes a shell and a filler, and the method further includes: in the case that the fan currents of the plurality of cooling towers are inconsistent, detecting the fan performance of each cooling tower for abnormality based on the shell state and the filler state of each cooling tower.

[0013] According to one embodiment of the present application, the fan performance of each cooling tower is detected for abnormality based on the shell state and the filler state of each cooling tower, including: in the case that neither the shell nor the filler of the cooling tower is damaged, determining that the fan performance of the cooling tower is decreased.

[0014] To achieve the above object, a computer readable storage medium is provided according to a second embodiment of the present application, and the computer readable storage medium stores a program which is executed by a processor to implement the abnormality detection method of the cooling tower group according to any one of the preceding embodiments.

[0015] To achieve the above object, the third aspect of the present application provides an air treatment device, comprising a memory, a processor and a program stored in the memory and executable on the processor, and when the processor executes the program, the method for detecting the abnormality of the cooling tower group according to any one of the preceding embodiments is implemented.

[0016] To achieve the above object, the fourth aspect of the present application provides a device for detecting the abnormality of a cooling tower group, the cooling tower group comprising a plurality of parallel cooling towers, each of the cooling towers comprising a fan, the device comprising: a first acquisition module configured to acquire the fan current of each of the cooling towers; a detection module configured to acquire the air-water ratio of each of the cooling towers under the condition that the fan currents of the plurality of cooling towers are consistent, and perform abnormality detection on the water distribution of the plurality of cooling towers based on the air-water ratio of each of the cooling towers.

[0017] According to the method and device for detecting the abnormality of the cooling tower group, the air treatment device and the medium, the fan current of each of the cooling towers is acquired, and under the condition that the fan currents of the plurality of cooling towers are consistent, the air-water ratio of each of the cooling towers is acquired, and abnormality detection is performed on the water distribution of the plurality of cooling towers based on the air-water ratio of each of the cooling towers, so that energy-saving fault diagnosis of the cooling tower group is realized. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 Structure diagram of the cooling tower group according to one embodiment of the present application.

[0019] Figure 2 Flowchart of the method for detecting the abnormality of the cooling tower group according to one embodiment of the present application.

[0020] Figure 3 Flowchart of the method for detecting the abnormality of the cooling tower group according to another embodiment of the present application.

[0021] Figure 4 Flowchart of the method for detecting the abnormality of the cooling tower group according to still another embodiment of the present application.

[0022] Figure 5 Structure diagram of the device for detecting the abnormality of the cooling tower group according to one embodiment of the present application. DETAILED DESCRIPTION

[0023] Embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0024] The cooling tower group anomaly detection method, device, air handling equipment and medium of the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0025] In the embodiments of the present application, the cooling tower group comprises a plurality of parallel cooling towers, each of which comprises a fan. For example, referring to Figure 1 , the cooling tower group can comprise cooling tower 1, cooling tower 2, cooling tower 3 and cooling tower 4, the cooling water inlets of the cooling tower 1 to the cooling tower 4 are connected to the cooling water inlet pipeline of the cooling tower group, and the cooling water outlets of the cooling tower 1 to the cooling tower 4 are connected to the cooling water outlet pipeline of the cooling tower group, that is, the cooling tower 1 to the cooling tower 4 are connected in parallel between the cooling water inlet pipeline and the cooling water outlet pipeline of the cooling tower group. Each cooling tower comprises a fan, such as fan 1 to fan 4. When the cooling tower group is working, the cooling water enters each cooling tower through the cooling water inlet pipeline of the cooling tower group, and at the same time, the fan of each cooling tower works to make the air enter each cooling tower through the air inlet of each cooling tower, so that the cooling water and the air exchange heat in the cooling tower, and the cooled cooling water flows out through the cooling water outlet pipeline of the cooling tower group, and the cooled air is discharged from the air outlet of the cooling tower.

[0026] During the working process of the cooling tower group, safety fault diagnosis is generally performed on the cooling tower group, such as excessive fan current, fan stall, cooling water flow interruption, etc., but there is a lack of energy-saving fault diagnosis of the cooling tower group. Based on this, in the embodiments of the present application, by acquiring the operating parameters of the cooling tower group, such as fan current, temperature, humidity and the like, the energy-saving fault diagnosis of the fan performance, water distribution and heat exchange efficiency of the cooling tower group can be realized.

[0027] Figure 2 is a flowchart of the cooling tower group anomaly detection method according to an embodiment of the present application. Referring to Figure 2 , the cooling tower group anomaly detection method can comprise:

[0028] S110, acquiring the fan current of each cooling tower.

[0029] Specifically, a current sensor can be set for the fan of each cooling tower, and the fan current of each cooling tower is acquired through the current sensor. For example, Figure 1 , a current sensor can be set for each of the fan 1 to the fan 4, and the corresponding current is acquired through the current sensor.

[0030] S120, acquiring the water-fan ratio of each cooling tower in the case that the fan currents of the plurality of cooling towers are consistent.

[0031] Specifically, after obtaining the fan currents of the cooling towers, it is determined whether the fan currents are the same or the difference is within a small range. If yes, it is considered that the fan currents of the cooling towers are consistent, and the air-water ratio of each cooling tower can be obtained. It should be noted that the air-water ratio refers to the ratio of air flow rate to cooling water flow rate.

[0032] As shown in Figure 1 , the fan current of each of the cooling towers 1 to 4 can be obtained. If the fan currents of the cooling towers 1 to 4 are the same, the air-water ratio of each of the cooling towers 1 to 4 is further obtained, for example, the ratio of the air flow rate to the cooling water flow rate of each cooling tower.

[0033] S130, based on the air-water ratio of each cooling tower, performing abnormality detection on the water distribution of the plurality of cooling towers.

[0034] Specifically, after obtaining the air-water ratio of each cooling tower, the abnormality detection on the water distribution of the plurality of cooling towers can be performed based on the air-water ratio of each cooling tower. For example, it can be determined whether the air-water ratios are the same or the difference is within a small range. If yes, it is considered that the water distribution of the plurality of cooling towers is uniform; if no, it is considered that the water distribution of the plurality of cooling towers is not uniform, i.e., the water distribution of the plurality of cooling towers is abnormal. That is, the fan current can be determined first to exclude fan failure, and then whether the water distribution is abnormal can be determined.

[0035] As shown in Figure 1 , after obtaining the air-water ratio of each of the cooling towers 1 to 4, if the air-water ratios of the cooling towers 1 to 4 are the same, it is considered that the water distribution of the plurality of cooling towers is uniform; if the air-water ratios of the cooling towers 1 to 4 are not the same, it is considered that the water distribution of the plurality of cooling towers is not uniform, i.e., the water distribution of the plurality of cooling towers is abnormal.

[0036] In the above embodiments, by obtaining the fan current and the air-water ratio of the cooling tower group, the abnormality detection on the water distribution of the cooling tower group can be realized, thereby realizing the energy-saving fault diagnosis of the cooling tower group to a certain extent.

[0037] In some embodiments, referring to Figure 3 , the air-water ratio of each cooling tower is obtained, including:

[0038] S210, for any cooling tower, obtaining the air inlet enthalpy value, the air outlet enthalpy value, the cooling water inlet temperature and the cooling water outlet temperature of the cooling tower.

[0039] Specifically, the enthalpy of air refers to the total heat contained in the air, the air inlet enthalpy of the cooling tower refers to the total heat contained in the air at the air inlet of the cooling tower, and the air outlet enthalpy of the cooling tower refers to the total heat contained in the air at the air outlet of the cooling tower. Enthalpy is a combination of temperature and humidity, so the air inlet enthalpy of the cooling tower can be obtained based on the temperature and humidity at the air inlet of the cooling tower, and the air outlet enthalpy of the cooling tower can be obtained based on the temperature and humidity at the air outlet of the cooling tower.

[0040] For example, referring to Figure 1 Since the temperature and humidity at the air inlet of each cooling tower are basically the same, one temperature sensor TA0 and one humidity sensor SA0 can be arranged at the air inlet of one cooling tower, such as cooling tower 1, the air inlet temperature of cooling tower 1 is obtained through temperature sensor TA0, the air inlet humidity of cooling tower 1 is obtained through humidity sensor SA0, and the air inlet enthalpy of cooling tower 1 is calculated according to the air inlet temperature and the air inlet humidity, so as to obtain the air inlet enthalpy of each cooling tower.

[0041] Since the air undergoes different degrees of heat exchange after entering each cooling tower, the temperature and humidity at the air outlet of each cooling tower are not the same, so a temperature sensor and a humidity sensor need to be arranged at the air outlet of each cooling tower, such as temperature sensor TA1 and humidity sensor SA1 arranged at the air outlet of cooling tower 1, the air outlet temperature of cooling tower 1 is obtained through temperature sensor TA1, the air outlet humidity of cooling tower 1 is obtained through humidity sensor SA1, and the air outlet enthalpy of cooling tower 1 is calculated according to the air outlet temperature and the air outlet humidity; similarly, the air outlet enthalpy of each cooling tower in cooling tower 2 to cooling tower 4 is calculated.

[0042] Similarly, a temperature sensor T0 can be arranged on the cooling water inlet pipeline of the cooling tower group, and the temperature of the cooling water in the cooling water inlet pipeline is obtained through temperature sensor T0 as the cooling water inlet temperature of each cooling tower. A temperature sensor, such as temperature sensor T1, is arranged at the cooling water outlet of each cooling tower to obtain the cooling water outlet temperature of the corresponding cooling tower.

[0043] S220, obtaining the difference between the air outlet enthalpy and the air inlet enthalpy to obtain the air inlet and outlet enthalpy difference, and obtaining the difference between the cooling water outlet temperature and the cooling water inlet temperature to obtain the cooling water inlet and outlet temperature difference.

[0044] S230, obtaining the ratio of the air inlet and outlet enthalpy difference to the cooling water inlet and outlet temperature difference to obtain the air-water ratio.

[0045] Specifically, based on the energy conservation, (air inlet enthalpy - air outlet enthalpy) x air flow = (cooling water inlet temperature - cooling water outlet temperature) x specific heat of water x cooling water flow, therefore, air-water ratio = air flow / cooling water flow = (cooling water inlet temperature - cooling water outlet temperature) x specific heat of water / (air inlet enthalpy - air outlet enthalpy). Wherein, the specific heat of water is a constant, and the purpose of calculation is to determine whether the air-water ratios of the multiple cooling towers are consistent, therefore, the specific heat of water can be omitted, so that it can not only be determined whether the air-water ratios are consistent, but also the calculation amount is reduced.

[0046] As shown in Figure 1 , after obtaining the air inlet enthalpy, air outlet enthalpy, cooling water inlet temperature and cooling water outlet temperature of each of the cooling towers 1 to 4, the air-water ratio of each of the cooling towers can be calculated according to air-water ratio = (cooling water inlet temperature - cooling water outlet temperature) x specific heat of water / (air inlet enthalpy - air outlet enthalpy), and then it is determined whether the water distribution of the multiple cooling towers is abnormal based on the air-water ratio of each of the cooling towers.

[0047] In some embodiments, based on the air-water ratio of each of the cooling towers, the abnormal detection of the water distribution of the multiple cooling towers comprises: in the case that the air-water ratios of the multiple cooling towers are inconsistent, it is determined that the water distribution of the multiple cooling towers is uneven, wherein the air-water ratio is inversely related to the water amount.

[0048] Specifically, it can be determined whether the air-water ratios of the multiple cooling towers are the same or the difference is within a very small range, if yes, it is considered that the air-water ratios of the multiple cooling towers are consistent, otherwise, it is considered that the air-water ratios of the multiple cooling towers are inconsistent, at this time, it is determined that the water distribution of the multiple cooling towers is uneven, wherein the air-water ratio is greater, the water amount is smaller, and the air-water ratio is smaller, the water amount is greater. As shown in Figure 1 , it is assumed that the air-water ratio of the cooling tower 1 is inconsistent with the air-water ratios of the other cooling towers, and is smaller than the air-water ratios of the other cooling towers, then it is considered that the water amount of the cooling tower 1 is greater.

[0049] In this way, the energy-saving fault diagnosis of the water distribution abnormality of the cooling tower group can be realized.

[0050] In some embodiments, referring to Figure 4 , the abnormal detection method of the cooling tower group can further comprise:

[0051] S310, in the case that the air-water ratios of the multiple cooling towers are consistent, the air inlet and outlet wet bulb temperature difference or the cooling water inlet and outlet temperature difference of each of the cooling towers is obtained.

[0052] Specifically, the wet-bulb temperature refers to the temperature reached by a piece of air when it is saturated (relative humidity reaches 100%). The wet-bulb temperature difference of the air inlet and outlet of the cooling tower refers to the difference between the wet-bulb temperature of the air outlet of the cooling tower and the wet-bulb temperature of the air inlet of the cooling tower, wherein the wet-bulb temperature of the air inlet of the cooling tower can be obtained according to the temperature and humidity at the air inlet of the cooling tower, and the wet-bulb temperature of the air outlet of the cooling tower can be obtained according to the temperature and humidity at the air outlet of the cooling tower.

[0053] For example, referring to Figure 1 The temperature sensor TA0 can be used to obtain the air inlet temperature of the cooling tower 1, the humidity sensor SA0 can be used to obtain the air inlet humidity of the cooling tower 1, and the air inlet wet-bulb temperature of the cooling tower 1 can be calculated according to the air inlet temperature and the air inlet humidity, so as to obtain the air inlet wet-bulb temperature of each cooling tower. At the same time, the temperature sensor TA1 can be used to obtain the air outlet temperature of the cooling tower 1, the humidity sensor SA1 can be used to obtain the air outlet humidity of the cooling tower 1, and the air outlet wet-bulb temperature of the cooling tower 1 can be calculated according to the air outlet temperature and the air outlet humidity, and the air outlet wet-bulb temperature of each of the cooling towers 2 to 4 can be calculated in the same way. Then, the difference between the air outlet wet-bulb temperature and the air inlet wet-bulb temperature of each of the cooling towers 1 to 4 is calculated to obtain the wet-bulb temperature difference of the air inlet and outlet of each cooling tower.

[0054] The cooling water inlet and outlet temperature difference refers to the difference between the cooling water outlet temperature and the cooling water inlet temperature of the cooling tower. As Figure 1 shown, the temperature sensor T0 can be used to obtain the temperature of the cooling water in the cooling water inlet pipeline as the cooling water inlet temperature of each cooling tower, and the temperature sensors T1 and the like can be used to obtain the cooling water outlet temperature of each cooling tower. Then, the difference between the cooling water outlet temperature and the cooling water inlet temperature is obtained to obtain the cooling water inlet and outlet temperature difference of each cooling tower.

[0055] In S320, the heat exchange efficiency of the plurality of cooling towers is detected for abnormality according to the wet-bulb temperature difference of the air inlet and outlet of each cooling tower or the cooling water inlet and outlet temperature difference.

[0056] Specifically, in the case where the air-water ratio of the plurality of cooling towers is consistent, that is, the case where the water amount of the cooling tower group is uniform, the heat exchange efficiency of each cooling tower can be judged to be abnormal or not based on the wet-bulb temperature difference of the air inlet and outlet of each cooling tower or the cooling water inlet and outlet temperature difference.

[0057] It should be noted that the calculation method of the heat exchange efficiency of the cooling tower can include two kinds. One is that the heat exchange efficiency = (cooling water inlet and outlet temperature difference) / (cooling water inlet temperature-air inlet wet bulb temperature). The other is that the heat exchange efficiency = (air inlet and outlet wet bulb temperature difference) / (cooling water inlet temperature-air inlet wet bulb temperature). In the two methods, the denominator is the difference between the cooling water inlet temperature and the air inlet wet bulb temperature. For the parallel cooling towers, the cooling water inlet temperature and the air inlet wet bulb temperature of each cooling tower are the same. Therefore, for each cooling tower, the denominator is the same when calculating the heat exchange efficiency. As long as the consistency of the numerator is judged, the difference of the heat exchange efficiency can be judged. That is, the consistency of the air inlet and outlet wet bulb temperature difference or the cooling water inlet and outlet temperature difference of each cooling tower is judged, and the abnormality of the heat exchange efficiency is detected.

[0058] In some embodiments, the abnormality of the heat exchange efficiency of the plurality of cooling towers is detected according to the air inlet and outlet wet bulb temperature difference or the cooling water inlet and outlet temperature difference of each cooling tower. The abnormality detection of the heat exchange efficiency of the plurality of cooling towers includes: in the case that the air inlet and outlet wet bulb temperature difference or the cooling water inlet and outlet temperature difference of the plurality of cooling towers is inconsistent, determining that the heat exchange efficiency of the cooling tower whose air inlet and outlet wet bulb temperature difference or cooling water inlet and outlet temperature difference meets the preset condition decreases.

[0059] For example, it can be judged whether the air inlet and outlet wet bulb temperature difference of each cooling tower is the same or the difference is within a very small range. If yes, it is considered that the plurality of cooling towers does not have the heat exchange efficiency decrease fault. If no, it is considered that the plurality of cooling towers has the heat exchange efficiency decrease fault. As shown in FIG. 2, it is assumed that the air inlet and outlet wet bulb temperature difference of the cooling tower 1 is smaller than that of the other cooling towers. It is considered that the heat exchange efficiency of the cooling tower 1 decreases. Figure 1 As shown in FIG. 3, it can be judged whether the cooling water inlet and outlet temperature difference of each cooling tower is the same or the difference is within a very small range. If yes, it is considered that the plurality of cooling towers does not have the heat exchange efficiency decrease fault. If no, it is considered that the plurality of cooling towers has the heat exchange efficiency decrease fault. As shown in FIG. 3, it is assumed that the cooling water inlet and outlet temperature difference of the cooling tower 1 is smaller than that of the other cooling towers. It is considered that the heat exchange efficiency of the cooling tower 1 decreases. Figure 1 As shown in FIG. 3, it can be judged whether the cooling water inlet and outlet temperature difference of each cooling tower is the same or the difference is within a very small range. If yes, it is considered that the plurality of cooling towers does not have the heat exchange efficiency decrease fault. If no, it is considered that the plurality of cooling towers has the heat exchange efficiency decrease fault. As shown in FIG. 3, it is assumed that the cooling water inlet and outlet temperature difference of the cooling tower 1 is smaller than that of the other cooling towers. It is considered that the heat exchange efficiency of the cooling tower 1 decreases.

[0060] In the above embodiments, by obtaining the air inlet and outlet wet bulb temperature difference or the cooling water inlet and outlet temperature difference of the cooling tower group, the abnormality of the heat exchange efficiency of the cooling tower group can be detected, so that the energy-saving fault diagnosis of the cooling tower group can be realized to a certain extent.

[0061] In some embodiments, each cooling tower further includes a shell and a filler. The method further includes: in the case that the fan currents of the plurality of cooling towers are inconsistent, the fan performance of each cooling tower is detected according to the shell state and the filler state of each cooling tower.

[0062] Specifically, in the cooling tower group, the plurality of cooling towers in parallel are of the same model and are operated at the same frequency, and in the case that the fan currents of the plurality of cooling towers are inconsistent, it is indicated that the fan of the cooling tower can have a fault, at this time, the cause of the fan fault can be further judged. For example, the shell state and the filler state of each cooling tower can be acquired, and whether the fan performance is decreased is further judged based on the shell state and the filler state.

[0063] In some embodiments, according to the shell state and the filler state of each cooling tower, the fan performance of each cooling tower is abnormally detected, including: in the case that the shell and the filler of the cooling tower are not damaged, it is determined that the fan performance of the cooling tower is decreased.

[0064] Specifically, in the case that the fan currents of the plurality of cooling towers are inconsistent, it is indicated that the fan of the cooling tower can have a fault, at this time, the shell state and the filler state of each cooling tower are acquired, and if the shell and the filler of the fan are not damaged, it is indicated that the fan performance is decreased. As shown in FIG. 5, it is assumed that the fan current of the cooling tower 1 is decreased compared with the fan currents of the other cooling towers, and the shell and the filler of the fan of the cooling tower 1 are not damaged, and it is indicated that the fan performance of the cooling tower 1 is decreased. Figure 1

[0065] In the above embodiments, by acquiring the fan current, the shell state and the filler state of the cooling tower group, the fan performance abnormality detection can be realized, and to a certain extent, the energy-saving fault diagnosis of the cooling tower group can be realized.

[0066] In summary, by acquiring the operating parameters of the cooling tower group, such as the fan current, temperature, humidity and the like, the fan performance, water distribution and heat exchange efficiency and the like of the cooling tower group can be diagnosed.

[0067] In some embodiments, a computer readable storage medium is also provided, and a program is stored on the computer readable storage medium, and the program is executed by a processor to implement the abnormality detection method of the cooling tower group of any of the preceding embodiments.

[0068] It should be noted that the above explanations and descriptions of the embodiments and beneficial effects of the abnormality detection method of the cooling tower group are also applicable to the computer readable storage medium of the embodiments of the present application, and to avoid redundancy, they will not be described in detail here.

[0069] In some embodiments, an air handling device is also provided, including a memory, a processor and a program stored on the memory and executable on the processor, and when the processor executes the program, the abnormality detection method of the cooling tower group of any of the preceding embodiments is implemented.

[0070] ​It should be noted that the above embodiments and beneficial effects of the cooling tower group anomaly detection method are also applicable to the air handling device of the present application. To avoid redundancy, they will not be described in detail here.

[0071] In some embodiments, a cooling tower group anomaly detection device is also provided.

[0072] With reference to Figure 5 The cooling tower group anomaly detection device 500 comprises a first acquisition module 510 and a detection module 520. The first acquisition module 510 is configured to acquire the fan current of each cooling tower. The detection module 520 is configured to, in the case that the fan currents of the plurality of cooling towers are consistent, acquire the air-water ratio of each cooling tower, and perform anomaly detection on the water distribution of the plurality of cooling towers based on the air-water ratio of each cooling tower.

[0073] According to an embodiment of the present application, the detection module 520 is specifically configured to, for any cooling tower, acquire the air inlet enthalpy value, the air outlet enthalpy value, the cooling water inlet temperature and the cooling water outlet temperature of the cooling tower; acquire the air inlet-outlet enthalpy value difference by taking the difference between the air outlet enthalpy value and the air inlet enthalpy value, and acquire the cooling water inlet-outlet temperature difference by taking the difference between the cooling water outlet temperature and the cooling water inlet temperature; and acquire the air-water ratio by taking the ratio of the air inlet-outlet enthalpy value difference and the cooling water inlet-outlet temperature difference.

[0074] According to an embodiment of the present application, the detection module 520 is specifically configured to acquire the air inlet temperature and the air inlet humidity of the cooling tower, and determine the air inlet enthalpy value according to the air inlet temperature and the air inlet humidity; and acquire the air outlet temperature and the air outlet humidity of the cooling tower, and determine the air outlet enthalpy value according to the air outlet temperature and the air outlet humidity.

[0075] According to an embodiment of the present application, the detection module 520 is specifically configured to, in the case that the air-water ratios of the plurality of cooling towers are inconsistent, determine that the water distribution of the plurality of cooling towers is uneven, wherein the air-water ratio is inversely related to the water quantity.

[0076] According to an embodiment of the present application, the detection module 520 is further configured to, in the case that the air-water ratios of the plurality of cooling towers are consistent, acquire the air inlet-outlet wet bulb temperature difference or the cooling water inlet-outlet temperature difference of each cooling tower; and perform anomaly detection on the heat exchange efficiency of the plurality of cooling towers according to the air inlet-outlet wet bulb temperature difference or the cooling water inlet-outlet temperature difference of each cooling tower.

[0077] According to one embodiment of the present application, the detection module 520 is specifically configured to: for any cooling tower, acquire an air inlet temperature and an air inlet humidity of the cooling tower, determine an air inlet wet-bulb temperature according to the air inlet temperature and the air inlet humidity; acquire an air outlet temperature and an air outlet humidity of the cooling tower, determine an air outlet wet-bulb temperature according to the air outlet temperature and the air outlet humidity; acquire a difference between the air outlet wet-bulb temperature and the air inlet wet-bulb temperature, and obtain an air inlet-outlet wet-bulb temperature difference.

[0078] According to one embodiment of the present application, the detection module 520 is specifically configured to: in a case where the air inlet-outlet wet-bulb temperature differences or the cooling water inlet-outlet temperature differences of the plurality of cooling towers are inconsistent, determine a cooling tower whose air inlet-outlet wet-bulb temperature difference or cooling water inlet-outlet temperature difference satisfies a preset condition, and determine that the heat exchange efficiency of the cooling tower is reduced.

[0079] According to one embodiment of the present application, each cooling tower further comprises a shell and a filler, and the detection module 520 is further configured to: in a case where the fan currents of the plurality of cooling towers are inconsistent, perform abnormal detection on fan performance of each cooling tower according to a shell state and a filler state of each cooling tower.

[0080] According to one embodiment of the present application, the detection module 520 is specifically configured to: in a case where neither the shell nor the filler of the cooling tower is damaged, determine that the fan performance of the cooling tower is reduced.

[0081] It should be noted that the above explanations and descriptions of the embodiments of the abnormal detection method of the cooling tower group and the beneficial effects are also applicable to the abnormal detection device of the cooling tower group of the embodiments of the present application, and to avoid redundancy, the details are not expanded here.

[0082] It is to be appreciated that the above description and the examples that follow are intended to be illustrative only and that changes can be made to the description, as represented by the above listed elements, by the steps recited in the flow charts, and by the examples that follow, without departing from the spirit of the application. Accordingly, the scope of the present application is intended to be defined only by the appended claims.

[0083] It should be understood that aspects of the application can be implemented in hardware, software, firmware or a combination thereof. In the above embodiments, various steps or methods can be implemented in software or firmware that is stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any of the following techniques, which are well known in the art of hardware implementation, can be used: a hybrid of the above techniques, a mixture of two or more of the above techniques, or a combination of the above techniques with other techniques not listed above.

[0084] In the description of the present application, the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. The illustrative appearances of the above-mentioned terms in various places in the specification are not intended to exclude that the terms in one place can refer to the same or similar features, structures, materials, or characteristics as other instances of the same term found in another location in the specification. Furthermore, the description of particular features, structures, materials, or characteristics in

[0085] In addition, the terms "first", "second", etc. are used only for the purpose of description, and should not be understood as indicating or implying relative importance or implying a number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0086] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0087] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. An abnormality detection method for a cooling tower group, characterized by, The cooling tower group comprises a plurality of parallel cooling towers, each of the cooling towers comprises a fan, and the method comprises: obtaining the fan current of each cooling tower; in the case where the fan currents of the plurality of cooling towers are consistent, obtaining the air-water ratio of each cooling tower; based on the air-water ratio of each cooling tower, performing abnormality detection on the water quantity distribution of the plurality of cooling towers; obtaining the air-water ratio of each cooling tower comprises: for any cooling tower, obtaining the air inlet enthalpy value, the air outlet enthalpy value, the cooling water inlet temperature and the cooling water outlet temperature of the cooling tower; obtaining the difference between the air outlet enthalpy value and the air inlet enthalpy value to obtain the air inlet and outlet enthalpy difference, and obtaining the difference between the cooling water outlet temperature and the cooling water inlet temperature to obtain the cooling water inlet and outlet temperature difference; obtaining the ratio of the air inlet and outlet enthalpy difference to the cooling water inlet and outlet temperature difference to obtain the air-water ratio.

2. The method of claim 1, wherein, obtaining the air inlet enthalpy value and the air outlet enthalpy value of the cooling tower comprises: obtaining the air inlet temperature and the air inlet humidity of the cooling tower, and determining the air inlet enthalpy value according to the air inlet temperature and the air inlet humidity; obtaining the air outlet temperature and the air outlet humidity of the cooling tower, and determining the air outlet enthalpy value according to the air outlet temperature and the air outlet humidity.

3. The method according to any of claims 1-2, characterized in that, the air-water ratio of each cooling tower, performing abnormality detection on the water quantity distribution of the plurality of cooling towers comprises: in the case where the air-water ratios of the plurality of cooling towers are inconsistent, determining that the water quantity distribution of the plurality of cooling towers is uneven, wherein the air-water ratio is inversely related to the water quantity.

4. The method of claim 3, wherein, the method further comprises: in the case where the air-water ratios of the plurality of cooling towers are consistent, obtaining the air inlet and outlet wet bulb temperature difference or the cooling water inlet and outlet temperature difference of each cooling tower; based on the air inlet and outlet wet bulb temperature difference or the cooling water inlet and outlet temperature difference of each cooling tower, performing abnormality detection on the heat exchange efficiency of the plurality of cooling towers.

5. The method of claim 4, wherein, obtaining the air inlet and outlet wet bulb temperature difference of each cooling tower comprises: for any cooling tower, obtaining the air inlet temperature and the air inlet humidity of the cooling tower, and determining the air inlet wet bulb temperature according to the air inlet temperature and the air inlet humidity; obtaining the air outlet temperature and the air outlet humidity of the cooling tower, and determining the air outlet wet bulb temperature according to the air outlet temperature and the air outlet humidity; obtaining the difference between the air outlet wet bulb temperature and the air inlet wet bulb temperature to obtain the air inlet and outlet wet bulb temperature difference.

6. The method of claim 4, wherein, the air inlet and outlet wet bulb temperature difference or the cooling water inlet and outlet temperature difference of each cooling tower, performing abnormality detection on the heat exchange efficiency of the plurality of cooling towers comprises: in the case where the air inlet and outlet wet bulb temperature difference or the cooling water inlet and outlet temperature difference of the plurality of cooling towers is inconsistent, determining that the heat exchange efficiency of the cooling tower satisfying the preset condition of the air inlet and outlet wet bulb temperature difference or the cooling water inlet and outlet temperature difference is decreased.

7. The method according to any one of claims 1-2, characterized in that, each of the cooling towers further comprises a shell and a filler, and the method further comprises: When the fan currents of multiple cooling towers are inconsistent, the fan performance of each cooling tower is abnormally detected based on the shell condition and packing condition of each cooling tower.

8. The method of claim 7, wherein, The step of detecting abnormalities in the fan performance of each cooling tower based on the shell condition and packing condition of each cooling tower includes: The cooling tower's fan performance was determined to be reduced, provided that neither the shell nor the packing of the cooling tower was damaged.

9. A computer-readable storage medium, characterized in that, It stores a program that, when executed by a processor, implements the anomaly detection method for a cooling tower group according to any one of claims 1-8.

10. An air treatment device, characterized in that include: The system includes a memory, a processor, and a program stored in the memory and executable on the processor, wherein the processor, when executing the program, implements the anomaly detection method for a cooling tower group according to any one of claims 1-8.

11. An anomaly detection device for a cooling tower assembly, characterized in that, The cooling tower group comprises multiple cooling towers connected in parallel, each cooling tower including a fan, and the device includes: The first acquisition module is used to acquire the fan current of each of the cooling towers; The detection module is used to obtain the air-to-water ratio of each cooling tower when the fan current of the multiple cooling towers is the same, and to perform anomaly detection on the water distribution of the multiple cooling towers based on the air-to-water ratio of each cooling tower. Obtaining the air-to-water ratio of each of the cooling towers includes: For any of the cooling towers, obtain the air inlet enthalpy, air outlet enthalpy, cooling water inlet temperature, and cooling water outlet temperature of the cooling tower; The difference between the air outlet enthalpy and the air inlet enthalpy is obtained to obtain the air inlet-outlet enthalpy difference, and the difference between the cooling water outlet temperature and the cooling water inlet temperature is obtained to obtain the cooling water inlet-outlet temperature difference. The air-water ratio is obtained by measuring the ratio of the enthalpy difference between the air inlet and outlet to the temperature difference between the cooling water inlet and outlet.

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