A water chiller control method and device, a water chiller and a storage medium

Abstract

The application discloses a water chilling unit control method and device, a water chilling unit and a storage medium, and relates to the technical field of water chilling units. The method comprises the following steps: acquiring sensor data on the water chilling unit; wherein the sensor data is operation parameters of the water chilling unit collected by a sensor; determining whether there is a target sensor with detection abnormity on the water chilling unit according to the sensor data; if it is determined that there is a target sensor with detection abnormity on the water chilling unit, acquiring target sensor data of other normal sensors; correcting the target sensor by using the target sensor data, and continuing to collect operation parameters of the water chilling unit by using the corrected target sensor. The application detects whether the sensor on the water chilling unit is abnormal by using sensor data, and further corrects the sensor with detection abnormity, so that the sensor on the water chilling unit can continue to operate normally, thereby improving the operation stability and reliability of the water chilling unit.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water chiller, and particularly relates to a water chiller control method and device, a water chiller and a storage medium. BACKGROUND

[0002] The water chiller is also called a refrigerator, a refrigeration unit, an ice water unit, a cooling device and the like. Because the water chiller is widely used in various industries, the requirements for the water chiller are different. The working principle of the water chiller is a multifunctional machine that removes liquid vapor through a compression or heat absorption type refrigeration cycle. In the refrigeration industry, the water chiller is divided into two types, namely, an air-cooled water chiller and a water-cooled water chiller, and is divided into a screw water chiller, a scroll water chiller and a centrifugal water chiller according to the compressor.

[0003] For the screw water chiller, the unit load is mainly controlled through the chilled water outlet temperature or the water inlet temperature, and the overall unit load control is affected by multiple factors such as water temperature, pressure and current. Therefore, if the water temperature, pressure and current sensor devices fail, the unit load control may be abnormal or the water chiller may not be used normally. However, there is no related solution in the prior art to solve the above problems. Therefore, how to detect whether the sensor on the water chiller is faulty to avoid abnormal load control of the water chiller or normal use of the water chiller is a problem to be solved by those skilled in the art. SUMMARY

[0004] The embodiments of the present application provide a water chiller control method and device, a water chiller and a storage medium, which are aimed at detecting the abnormality of the sensor of the water chiller and improving the operation stability and reliability of the water chiller.

[0005] In a first aspect, the embodiments of the present application provide a water chiller control method, which comprises the following steps.

[0006] In the operation process of the water chiller, sensor data on the water chiller is acquired, wherein the sensor data is the operation parameter of the water chiller collected by sensors of different types and installed at different positions of the water chiller.

[0007] It is determined whether there is a target sensor with detection abnormality on the water chiller according to the sensor data.

[0008] If it is determined that there is a target sensor with detection abnormality on the water chiller, target sensor data of other normally detected sensors is acquired.

[0009] The target sensor is corrected by using the target sensor data, and the operation parameter of the water chiller is continuously collected by using the corrected target sensor.

[0010] In a second aspect, an embodiment of the present application provides a water chiller control device, comprising:

[0011] a first obtaining unit, configured to obtain sensor data on the water chiller during operation of the water chiller, wherein the sensor data is collected by sensors of different types installed at different positions of the water chiller and is an operating parameter of the water chiller;

[0012] an anomaly detecting unit, configured to determine whether there is a target sensor with detection anomaly on the water chiller according to the sensor data;

[0013] a second obtaining unit, configured to obtain target sensor data of other normally-detecting sensors if it is determined that there is a target sensor with detection anomaly on the water chiller;

[0014] a correction collecting unit, configured to correct the target sensor by using the target sensor data and continue to collect the operating parameter of the water chiller by using the corrected target sensor.

[0015] In a third aspect, an embodiment of the present application provides a water chiller, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the water chiller control method according to the first aspect when executing the computer program.

[0016] In a fourth aspect, an embodiment of the present application provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program, and the computer program is executable on a processor to implement the water chiller control method according to the first aspect.

[0017] The embodiments of the present application provide a water chiller control method and device, a water chiller, and a storage medium. The method comprises: obtaining sensor data on the water chiller during operation of the water chiller, wherein the sensor data is collected by sensors of different types installed at different positions of the water chiller and is an operating parameter of the water chiller; determining whether there is a target sensor with detection anomaly on the water chiller according to the sensor data; obtaining target sensor data of other normally-detecting sensors if it is determined that there is a target sensor with detection anomaly on the water chiller; correcting the target sensor by using the target sensor data and continuing to collect the operating parameter of the water chiller by using the corrected target sensor. The embodiments of the present application detect whether the sensors on the water chiller are abnormal by using the collected sensor data, further correct the sensors with detection anomaly by using the sensor data, so that the sensors on the water chiller can continue to operate normally, avoid the sensors with detection anomaly from affecting the normal operation of the water chiller, and thus improve the operation stability and reliability of the water chiller. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic flowchart of a chiller unit control method provided in an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the chiller unit load in a chiller unit control method provided by an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of a sub-process of step S102 in a chiller unit control method provided in an embodiment of the present invention;

[0022] Figure 4 This is another sub-process diagram of step S102 in a chiller unit control method provided in an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of a sub-process of step S303 in a chiller unit control method provided in an embodiment of the present invention;

[0024] Figure 6 This is another schematic flowchart of a chiller unit control method provided in an embodiment of the present invention;

[0025] Figure 7 A schematic block diagram of a chiller unit control device provided in an embodiment of the present invention;

[0026] Figure 8 This is a first sub-schematic block diagram of a chiller unit control device provided in an embodiment of the present invention;

[0027] Figure 9 This is a second schematic block diagram of a chiller unit control device provided in an embodiment of the present invention;

[0028] Figure 10 A schematic block diagram of a third sub-section of a chiller unit control device provided in an embodiment of the present invention;

[0029] Figure 11 Another schematic block diagram of a chiller unit control device provided in an embodiment of the present invention. Detailed Implementation

[0030] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0031] It should be understood that the terms "comprising" and "including" as used in the specification and the appended claims indicate the presence of the described features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0032] It should also be understood that the terms used in the present application specification are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the present application specification and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0033] It should be further understood that the term "and / or" used in the present application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0034] Please see Figure 1 The embodiment of the present application provides a water chiller control method, specifically comprising steps S101-S104.

[0035] Step S101, during the operation of the water chiller, acquiring sensor data on the water chiller; wherein the sensor data is the operating parameter of the water chiller collected by sensors of different types installed at different positions of the water chiller;

[0036] Step S102, determining whether there is a target sensor with detection abnormality on the water chiller according to the sensor data;

[0037] Step S103, if it is determined that there is a target sensor with detection abnormality on the water chiller, acquiring target sensor data of other normally detected sensors;

[0038] Step S104, correcting the target sensor using the target sensor data, and continuing to collect the operating parameter of the water chiller using the corrected target sensor.

[0039] In the embodiment, when the water chiller is running, first, the running parameters of the water chiller are collected by the sensors on the water chiller as sensor data, and then whether the sensors on the water chiller are abnormal is determined according to the sensor data. If all the sensors on the water chiller are normal, the water chiller continues to run, and the running parameters are continuously collected by the sensors. If a sensor on the water chiller is abnormal, the abnormal sensor is corrected by the sensor data collected by the normal sensors, and after the correction is completed, the running parameters of the water chiller are continuously collected.

[0040] In the embodiment, whether the sensors on the water chiller are abnormal is detected by the collected sensor data, and the abnormal sensors are further corrected by the sensor data, so that the sensors on the water chiller can continue to run normally, the normal running of the water chiller is avoided to be affected by the abnormal sensors, and thus the running stability and reliability of the water chiller are improved.

[0041] In an actual application scenario, in combination with Figure 2 , the running parameters of the water chiller include temperature parameters, pressure parameters and current parameters, wherein the temperature parameters specifically include refrigerated water temperature, cooling water temperature, exhaust temperature, suction temperature and other temperatures; the pressure parameters include evaporation pressure, condensation pressure, oil supply pressure, exhaust pressure, suction pressure and other pressures; and the current parameters include compressor current. Correspondingly, in order to complete the collection of the running parameters, a sensor can be arranged for each of the above parameters, for example, a sensor for collecting refrigerated water temperature, a sensor for collecting cooling water temperature, a sensor for collecting exhaust temperature, and the like.

[0042] In an embodiment, as shown in Figure 3 , the step S102 includes steps S201-S207.

[0043] In step S201, the refrigerated water inlet temperature, the refrigerated water outlet temperature and the actual water flow of the refrigeration side of the water chiller are obtained according to the sensor data.

[0044] In step S202, the first actual heat exchange amount of the refrigeration side of the water chiller is calculated according to the refrigerated water inlet temperature, the refrigerated water outlet temperature and the actual water flow.

[0045] In step S203, the supercooling point temperature and the supercooling point pressure at the outlet of the refrigerant side of the water chiller, and the superheat temperature and the superheat pressure at the inlet of the evaporator of the water chiller are obtained according to the sensor data.

[0046] In step S204, the second actual heat exchange amount of the refrigerant side of the water chiller is calculated according to the supercooling point temperature and the supercooling point pressure, and the superheat temperature and the superheat pressure.

[0047] In step S205, a first heat exchange difference between the first actual heat exchange and the second actual heat exchange is obtained, and the first heat exchange difference is compared with a preset first difference threshold.

[0048] In step S206, if the first heat exchange difference does not reach the preset first difference threshold, it is determined that there is no target sensor with detection abnormality on the water chiller.

[0049] In step S207, if the first heat exchange difference reaches the preset first difference threshold, it is determined that there is a target sensor with detection abnormality on the water chiller.

[0050] In the embodiment, in the process of running the water chiller, the actual water flow H, the chilled water inlet temperature T1 and the chilled water outlet temperature T2 can be obtained by the sensors, and thus the first actual heat exchange Q1 of the water chiller on the chilled side can be calculated. At the same time, in the refrigerant circulation system, the supercooling point temperature T3 and the pressure P3 can be detected by the sensors arranged at the outlet of the condenser, and the superheat temperature T4 and the pressure P4 can be detected by the sensors arranged at the inlet of the evaporator, and further, the first enthalpy value in this state can be calculated according to the supercooling point temperature T3 and the pressure P3, and the second enthalpy value in this state can be calculated according to the superheat temperature T4 and the pressure P4, and thus the second actual heat exchange Q2 of the water chiller on the refrigerant side can be calculated based on the first enthalpy value and the second enthalpy value.

[0051] After the first actual heat exchange Q1 and the second actual heat exchange Q2 are obtained, the heat exchanges Q1 and Q2 on the chilled side and the refrigerant side can be compared and analyzed. If the difference between Q1 and Q2 is less than A% (i.e., the preset first difference threshold), it is defaulted that the current deviation is within the allowable deviation range, and thus the water chiller can continue to run according to the current state. If the difference between Q1 and Q2 is equal to or greater than A% (i.e., the preset first difference threshold), it is considered that the current deviation exceeds the allowable deviation range, and thus it is determined that the sensor of the water chiller is abnormal.

[0052] In addition, in the actual application scenario, the evaporation pressure of the water chiller is the same as the replacement scheme of the chilled side inlet and outlet water temperature, i.e., the evaporation pressure corresponds to the evaporation temperature of the water chiller, and the evaporation temperature and the suction pressure are also a set of values that can be replaced with each other.

[0053] Further, in an embodiment, as shown in FIG. 3, Figure 4 The step S102 further includes steps S301-S303.

[0054] In step S301, the compressor discharge volume in the water chiller is obtained according to the sensor data, and the refrigerant mass flow in the water chiller is calculated according to the compressor discharge volume.

[0055] In step S302, the third actual heat exchange amount on the evaporator side of the water chiller is calculated according to the refrigerant mass flow, the chilled water inlet temperature, the chilled water outlet temperature and the superheat temperature.

[0056] In step S303, the third actual heat exchange amount is compared with the first actual heat exchange amount and the second actual heat exchange amount respectively to determine whether the target sensor on the chilled side or the refrigerant side of the water chiller has a detection abnormality.

[0057] In this embodiment, after detecting that the sensor of the water chiller has an abnormality, the abnormal sensor needs to be accurately located, i.e., it is determined which position of the sensor has an abnormality, so that the subsequent correction operation can be performed more accurately and quickly. Specifically, after obtaining the first actual heat exchange amount Q1 on the chilled side of the water chiller and the second actual heat exchange amount Q2 on the refrigerant side of the water chiller, the third actual heat exchange amount Q3 on the evaporator side of the water chiller is calculated through the sensor data, so that Q1 and Q2 are compared and analyzed through Q3 to determine whether Q1 or Q2 has an abnormality.

[0058] Specifically, as shown in FIG. 4, the step S303 includes steps S401-S404. Figure 5

[0059] In step S401, a second heat exchange amount difference between the third actual heat exchange amount and the first actual heat exchange amount is obtained, and the second heat exchange amount difference is compared with a preset second difference threshold value.

[0060] In step S402, if the second heat exchange amount difference does not reach the preset second difference threshold value, it is determined that the target sensor on the chilled side of the water chiller does not have a detection abnormality; if the second heat exchange amount difference reaches the preset second difference threshold value, it is determined that the target sensor on the chilled side of the water chiller has a detection abnormality.

[0061] In step S403, a third heat exchange amount difference between the third actual heat exchange amount and the second actual heat exchange amount is obtained, and the third heat exchange amount difference is compared with a preset second difference threshold value.

[0062] In step S404, if the third heat exchange amount difference does not reach the preset second difference threshold value, it is determined that the target sensor on the refrigerant side of the water chiller does not have a detection abnormality; if the third heat exchange amount difference reaches the preset second difference threshold value, it is determined that the target sensor on the refrigerant side of the water chiller has a detection abnormality. ​

[0063] That is, if the difference between the first actual heat exchange amount Q1 and the third actual heat exchange amount Q3 belongs to the normal range, and the difference between the second actual heat exchange amount Q2 and the third actual heat exchange amount Q3 exceeds the normal range, it is considered that the second actual heat exchange amount Q2 is abnormal; if the difference between the first actual heat exchange amount Q1 and the third actual heat exchange amount Q3 exceeds the normal range belongs to the normal range, and the difference between the second actual heat exchange amount Q2 and the third actual heat exchange amount Q3 belongs to the normal range, it is considered that the first actual heat exchange amount Q1 is abnormal.

[0064] Of course, it can be understood that in some optional embodiments, the actual heat exchange amounts of the chiller on the refrigerant side and the evaporator side can be calculated respectively by sensor data at first, and when the actual heat exchange amounts on the refrigerant side and the evaporator side are abnormal, the actual heat exchange amount on the freezing side is used for comparative analysis to determine the specific position of the abnormal sensor. Or the actual heat exchange amounts of the chiller on the freezing side and the evaporator side can be calculated respectively by sensor data at first, and when the actual heat exchange amounts on the freezing side and the evaporator side are abnormal, the actual heat exchange amount on the refrigerant side is used for comparative analysis to determine the specific position of the abnormal sensor.

[0065] In an embodiment, the step S104 comprises:

[0066] When it is determined that the target sensor with detection abnormality exists on the freezing side of the chiller, a first average value between the second actual heat exchange amount and the third actual heat exchange amount is calculated, and the first average value is taken as a fourth actual heat exchange amount;

[0067] The corrected inlet water temperature and the corrected outlet water temperature of the chiller on the freezing side are calculated according to the fourth actual heat exchange amount, and the target sensor is corrected based on the corrected inlet water temperature and the corrected outlet water temperature.

[0068] In another embodiment, the step S104 further comprises:

[0069] When it is determined that the target sensor with detection abnormality exists on the refrigerant side of the chiller, a second average value between the first actual heat exchange amount and the third actual heat exchange amount is calculated, and the second average value is taken as a fifth actual heat exchange amount;

[0070] The corrected supercooling point temperature of the chiller on the refrigerant side is calculated according to the fifth actual heat exchange amount, and the target sensor is corrected based on the corrected supercooling point temperature.

[0071] In the embodiment, after detecting that the sensor has an abnormality and accurately positioning the position where the sensor is located, the abnormal sensor can be corrected. Specifically, if the first actual heat exchange amount on the refrigeration side has an abnormality, the second actual heat exchange amount on the refrigerant side and the third actual heat exchange amount on the evaporator side are averaged, and the average value is taken as the fourth actual heat exchange amount; or if the second actual heat exchange amount on the refrigerant side has an abnormality, the first actual heat exchange amount on the refrigeration side and the third actual heat exchange amount on the evaporator side are averaged, and the average value is taken as the fifth actual heat exchange amount; then the fourth actual heat exchange amount or the second actual heat exchange amount is used for parameter inversion to obtain the parameter value in the normal case, and the abnormal sensor is corrected.

[0072] For example, when the first actual heat exchange amount on the refrigeration side has an abnormality, the fourth actual heat exchange amount is calculated by the second actual heat exchange amount on the refrigerant side and the third actual heat exchange amount on the evaporator side, and then the fourth actual heat exchange amount is substituted into the water system calculation formula, that is, Q (换热量) =C (比热容) *m (水流量) *△t (进出水温差) , so that the corrected cooling water temperature and refrigeration water temperature are obtained, and the corresponding sensor is corrected according to the corrected cooling water temperature and refrigeration water temperature.

[0073] In an embodiment, as shown in Figure 6 , after the step S104, the steps S501-S503 are included.

[0074] In step S501, the sensor data is continuously acquired, and the target sensor is judged for abnormality by the sensor data.

[0075] In step S502, if it is determined that the target sensor has no abnormality, the running parameters of the water chiller are continuously collected by the target sensor.

[0076] In step S503, if it is determined that the target sensor has an abnormality, the same type sensor as the target sensor is acquired, the same type sensor is used to replace the target sensor, and then the running parameters of the water chiller are continuously collected.

[0077] In this embodiment, after the sensor correction is completed, the running parameters of the water chiller are continuously collected by the corrected sensor. If the sensor still detects abnormality in the subsequent collection process, the sensor of the same type is used to replace the abnormal sensor, so as to ensure that the water chiller can be stably and normally operated. For example, if the sensor for collecting the exhaust temperature is abnormal and cannot be restored to normal after correction, the sensor for collecting the condensing temperature can be used to replace the sensor for collecting the exhaust temperature. For another example, for the compressor current, the U, V and W three-phase currents of the compressor are actually detected, so when one phase is abnormal and cannot be corrected, the other two phases can be used to replace it.

[0078] Figure 7 A schematic block diagram of a water chiller control device 600 provided in an embodiment of the present application is shown in the figure, and the device 600 comprises:

[0079] A first acquisition unit 601 is configured to acquire sensor data of a water chiller during operation of the water chiller, wherein the sensor data is running parameter of the water chiller collected by sensors of different types installed at different positions of the water chiller;

[0080] An abnormality detection unit 602 is configured to determine whether there is a target sensor with detection abnormality on the water chiller according to the sensor data;

[0081] A second acquisition unit 603 is configured to acquire target sensor data of other normal sensors if it is determined that there is a target sensor with detection abnormality on the water chiller;

[0082] A correction and collection unit 604 is configured to correct the target sensor by using the target sensor data, and continue to collect the running parameter of the water chiller by using the corrected target sensor.

[0083] In an embodiment, as shown in the figure, the abnormality detection unit 602 comprises: Figure 8

[0084] A refrigeration side acquisition unit 701 is configured to acquire refrigeration water inlet temperature, refrigeration water outlet temperature and actual water flow of the refrigeration side of the water chiller according to the sensor data;

[0085] A first calculation unit 702 is configured to calculate a first actual heat exchange amount of the refrigeration side of the water chiller according to the refrigeration water inlet temperature, the refrigeration water outlet temperature and the actual water flow;

[0086] A refrigerant side acquisition unit 703 is configured to acquire supercooling point temperature and supercooling point pressure at the outlet of the refrigerant side of the water chiller, and acquire superheat temperature and superheat pressure at the inlet of the evaporator of the water chiller according to the sensor data.​

[0087] The second calculation unit 704 is used to calculate the second actual heat exchange of the chiller unit on the refrigerant side based on the subcooling point temperature and subcooling point pressure, as well as the superheat temperature and superheat pressure.

[0088] The difference acquisition unit 705 is used to acquire the first heat exchange difference between the first actual heat exchange and the second actual heat exchange, and compare the first heat exchange difference with a preset first difference threshold.

[0089] The first determination unit 706 is used to determine that there is no target sensor with abnormal detection on the chiller unit if the first heat exchange difference does not reach the preset first difference threshold.

[0090] The second determination unit 707 is used to determine that there is a target sensor with an abnormality on the chiller unit if the difference in the first heat exchange reaches a preset first difference threshold.

[0091] In one embodiment, such as Figure 9 As shown, the anomaly detection unit 602 further includes:

[0092] The flow calculation unit 801 is used to obtain the compressor discharge volume in the chiller unit based on the sensor data, and to calculate the refrigerant mass flow rate in the chiller unit based on the compressor discharge volume.

[0093] The third calculation unit 802 is used to calculate the third actual heat exchange of the chiller unit on the evaporator side by combining the refrigerant mass flow rate and the chilled water inlet temperature, chilled water outlet temperature and superheat temperature.

[0094] The heat exchange comparison unit 803 is used to compare the third actual heat exchange with the first actual heat exchange and the second actual heat exchange, respectively, to determine whether there is a target sensor with an abnormality on the chiller unit on the refrigeration side or the refrigerant side.

[0095] In one embodiment, such as Figure 10 As shown, the heat exchange comparison unit 803 includes:

[0096] The first comparison unit 901 is used to obtain the second heat exchange difference between the third actual heat exchange and the first actual heat exchange, and compare the second heat exchange difference with a preset second difference threshold.

[0097] The third determination unit 902 is used to determine that if the second heat exchange difference does not reach the preset second difference threshold, there is no target sensor with abnormal detection on the refrigeration side of the chiller unit; and if the second heat exchange difference reaches the preset second difference threshold, there is target sensor with abnormal detection on the refrigeration side of the chiller unit.

[0098] The second comparison unit 903 is configured to obtain a third heat exchange difference between the third actual heat exchange and the second actual heat exchange, and compare the third heat exchange difference with a preset second difference threshold value.

[0099] The fourth determination unit 904 is configured to determine that there is no target sensor with detection abnormality on the refrigerant side of the water chiller if the third heat exchange difference does not reach the preset second difference threshold value, and determine that there is a target sensor with detection abnormality on the refrigerant side of the water chiller if the third heat exchange difference reaches the preset second difference threshold value.

[0100] In an embodiment, the correction acquisition unit 604 comprises:

[0101] The first average calculation unit is configured to calculate a first average value between the second actual heat exchange and the third actual heat exchange when it is determined that there is a target sensor with detection abnormality on the freezing side of the water chiller, and take the first average value as a fourth actual heat exchange.

[0102] The first correction unit is configured to obtain a corrected inlet water temperature and a corrected outlet water temperature on the freezing side of the water chiller according to the fourth actual heat exchange, and correct the target sensor based on the corrected inlet water temperature and the corrected outlet water temperature.

[0103] In an embodiment, the correction acquisition unit 604 further comprises:

[0104] The second average calculation unit is configured to calculate a second average value between the first actual heat exchange and the third actual heat exchange when it is determined that there is a target sensor with detection abnormality on the refrigerant side of the water chiller, and take the second average value as a fourth actual heat exchange.

[0105] The second correction unit is configured to obtain a corrected supercooling point temperature on the refrigerant side of the water chiller according to the fourth actual heat exchange, and correct the target sensor based on the corrected supercooling point temperature.

[0106] In an embodiment, as shown in Figure 11 The water chiller control device 600 further comprises:

[0107] The abnormality determination unit 1001 is configured to continue to obtain sensor data, and determine the abnormality of the target sensor through the sensor data.

[0108] The first acquisition unit 1002 is configured to continue to acquire the operating parameters of the water chiller by using the target sensor if it is determined that the target sensor has no abnormality.

[0109] The second acquisition unit 1003 is configured to, if it is determined that the target sensor is abnormal, acquire a same-type sensor of the target sensor, and replace the target sensor with the same-type sensor, and then continue to acquire the operation parameter of the water chilling unit.

[0110] Since the embodiments of the device part correspond to the embodiments of the method part, the embodiments of the device part are described in the description of the embodiments of the method part, and are not described here.

[0111] The embodiments of the present application also provide a computer readable storage medium, which has a computer program stored thereon, and the computer program can implement the steps provided by the above embodiments when executed. The storage medium can include a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various storage medium capable of storing program codes.

[0112] The embodiments of the present application also provide a water chilling unit, which can include a memory and a processor, the memory has a computer program stored therein, and the processor can implement the steps provided by the above embodiments when calling the computer program in the memory. Of course, the water chilling unit can also include various network interfaces, power supplies and other components.

[0113] The embodiments in the description are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts of each embodiment can be referred to each other. For the system disclosed by the embodiments, since it corresponds to the method disclosed by the embodiments, the description is relatively simple, and the related parts can be referred to the method part. It should be pointed out that, for ordinary skilled in the art, without departing from the principles of the present application, the present application can be improved and modified, and these improvements and modifications also fall within the protection scope of the claims of the present application.

[0114] It should also be noted that, in the present specification, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another same element in the process, method, article or equipment including the element.

Claims

1. A chiller control method, comprising: The application relates to a method for detecting abnormal sensors of a water chiller. During operation of the water chiller, sensor data on the water chiller is acquired; wherein the sensor data is operation parameters of the water chiller collected by sensors installed at different positions and of different types on the water chiller; whether there is a target sensor with detection abnormality on the water chiller is determined according to the sensor data; if it is determined that there is a target sensor with detection abnormality on the water chiller, target sensor data of other normally-detecting sensors is acquired; the target sensor is corrected by using the target sensor data, and the corrected target sensor continues to collect operation parameters of the water chiller; whether there is a target sensor with detection abnormality on the water chiller is determined according to the sensor data, and the method comprises the following steps: the chilled water inlet temperature, the chilled water outlet temperature and the actual water flow of the freezing side of the water chiller are acquired according to the sensor data; the first actual heat exchange amount of the freezing side of the water chiller is calculated according to the chilled water inlet temperature, the chilled water outlet temperature and the actual water flow; the supercooling point temperature and the supercooling point pressure at the outlet of the refrigerant side of the water chiller and the superheat temperature and the superheat pressure at the inlet of the evaporator of the water chiller are acquired according to the sensor data; the second actual heat exchange amount of the refrigerant side of the water chiller is calculated according to the supercooling point temperature and the supercooling point pressure and the superheat temperature and the superheat pressure; a first heat exchange amount difference between the first actual heat exchange amount and the second actual heat exchange amount is acquired, and the first heat exchange amount difference is compared with a preset first difference threshold value; if the first heat exchange amount difference does not reach the preset first difference threshold value, it is determined that there is no target sensor with detection abnormality on the water chiller; if the first heat exchange amount difference reaches the preset first difference threshold value, it is determined that there is a target sensor with detection abnormality on the water chiller.

2. The water chiller control method of claim 1, wherein whether there is a target sensor with detection abnormality on the water chiller is determined according to the sensor data, and the method further comprises the following steps: the compressor discharge amount in the water chiller is acquired according to the sensor data, and the refrigerant mass flow in the water chiller is calculated according to the compressor discharge amount; the third actual heat exchange amount of the evaporator side of the water chiller is calculated in combination with the refrigerant mass flow and the chilled water inlet temperature, the chilled water outlet temperature, the superheat temperature; the third actual heat exchange amount is compared with the first actual heat exchange amount and the second actual heat exchange amount respectively to determine whether there is a target sensor with detection abnormality on the freezing side or the refrigerant side of the water chiller.

3. The water chiller control method according to claim 2, characterized in that, the third actual heat exchange amount is compared with the first actual heat exchange amount and the second actual heat exchange amount respectively to determine whether there is a target sensor with detection abnormality on the freezing side or the refrigerant side of the water chiller, and the method comprises the following steps: a second heat exchange amount difference between the third actual heat exchange amount and the first actual heat exchange amount is acquired, and the second heat exchange amount difference is compared with a preset second difference threshold value; If the second heat exchange amount difference value does not reach the preset second difference threshold value, it is determined that the target sensor on the refrigeration side of the water chiller does not exist detection abnormality; if the second heat exchange amount difference value reaches the preset second difference threshold value, it is determined that the target sensor on the refrigeration side of the water chiller exists detection abnormality; A third heat exchange amount difference value between the third actual heat exchange amount and the second actual heat exchange amount is obtained, and the third heat exchange amount difference value is compared with a preset second difference threshold value; If the third heat exchange amount difference value does not reach the preset second difference threshold value, it is determined that the target sensor on the refrigerant side of the water chiller does not exist detection abnormality; if the third heat exchange amount difference value reaches the preset second difference threshold value, it is determined that the target sensor on the refrigerant side of the water chiller exists detection abnormality.

4. The water chiller control method according to claim 3, characterized in that, The target sensor is corrected by using the target sensor data, and the running parameters of the water chiller are continuously collected by using the corrected target sensor, which includes: When it is determined that the target sensor on the refrigeration side of the water chiller exists detection abnormality, a first average value between the second actual heat exchange amount and the third actual heat exchange amount is calculated, and the first average value is taken as a fourth actual heat exchange amount; The corrected inlet water temperature and the corrected outlet water temperature on the refrigeration side of the water chiller are obtained according to the fourth actual heat exchange amount, and the target sensor is corrected based on the corrected inlet water temperature and the corrected outlet water temperature.

5. The water chiller control method according to claim 3, characterized by, The target sensor is corrected by using the target sensor data, and the running parameters of the water chiller are continuously collected by using the corrected target sensor, which further includes: When it is determined that the target sensor on the refrigerant side of the water chiller exists detection abnormality, a second average value between the first actual heat exchange amount and the third actual heat exchange amount is calculated, and the second average value is taken as a fifth actual heat exchange amount; The corrected supercooling point temperature on the refrigerant side of the water chiller is obtained according to the fifth actual heat exchange amount, and the target sensor is corrected based on the corrected supercooling point temperature.

6. The water chiller control method according to claim 1, characterized by, After the step of correcting the target sensor by using the target sensor data and continuously collecting the running parameters of the water chiller by using the corrected target sensor, it includes: Continuously acquiring sensor data, and judging the target sensor for abnormality by using the sensor data; If it is determined that the target sensor does not exist abnormality, the running parameters of the water chiller are continuously collected by using the target sensor; If it is determined that the target sensor exists abnormality, a same type sensor of the target sensor is acquired, and the same type sensor is used to replace the target sensor, and then the running parameters of the water chiller are continuously collected.

7. A water chiller control device, characterized by, It includes: A first acquisition unit is configured to acquire sensor data on a water chiller during operation of the water chiller, wherein the sensor data is collected by sensors of different types and installed at different positions of the water chiller; An abnormality detection unit is configured to determine whether a target sensor on the water chiller exists detection abnormality according to the sensor data; The second acquisition unit is configured to acquire target sensor data of other normal sensors if it is determined that the target sensor of the water chiller unit has a detection abnormality; The correction acquisition unit is configured to correct the target sensor by using the target sensor data, and continue to acquire the operation parameters of the water chiller unit by using the corrected target sensor; The abnormality detection unit comprises: The freezing side acquisition unit is configured to acquire the chilled water inlet temperature, the chilled water outlet temperature and the actual water flow of the freezing side of the water chiller unit according to the sensor data; The first calculation unit is configured to calculate the first actual heat exchange amount of the freezing side of the water chiller unit according to the chilled water inlet temperature, the chilled water outlet temperature and the actual water flow; The refrigerant side acquisition unit is configured to acquire the supercooling point temperature and the supercooling point pressure at the outlet of the refrigerant side of the water chiller unit, and acquire the superheat temperature and the superheat pressure at the inlet of the evaporator of the water chiller unit according to the sensor data; The second calculation unit is configured to calculate the second actual heat exchange amount of the refrigerant side of the water chiller unit according to the supercooling point temperature and the supercooling point pressure, and the superheat temperature and the superheat pressure; The difference acquisition unit is configured to acquire a first heat exchange amount difference between the first actual heat exchange amount and the second actual heat exchange amount, and compare the first heat exchange amount difference with a preset first difference threshold value; The first determination unit is configured to determine that there is no target sensor with a detection abnormality on the water chiller unit if the first heat exchange amount difference does not reach the preset first difference threshold value; The second determination unit is configured to determine that there is a target sensor with a detection abnormality on the water chiller unit if the first heat exchange amount difference reaches the preset first difference threshold value.

8. A water chiller, characterized by, The computer readable storage medium stores a computer program, and the computer program is executed by the processor to implement the water chiller unit control method according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, The computer readable storage medium stores a computer program, and the computer program is executed by the processor to implement the water chiller unit control method according to any one of claims 1 to 6.

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