Water chilling unit control method and device, water chilling unit and storage medium

Abstract

The invention discloses a water chilling unit control method and device, a water chilling unit and a storage medium. The method comprises the steps that sensor data on the water chilling unit are obtained; wherein the sensor data is operation parameters, collected by a sensor, of the water chilling unit; judging whether a target sensor with abnormal detection exists on the water chilling unit or not according to the sensor data; if it is judged that the target sensor which is detected to be abnormal exists on the water chilling unit, target sensor data of other sensors which are detected to be normal are obtained; and correcting the target sensor by using the target sensor data, and continuously collecting the operation parameters of the water chilling unit by using the corrected target sensor. Whether the sensor on the water chilling unit is abnormal or not is detected through the sensor data, and the sensor which is detected to be abnormal is further corrected, so that the sensor on the water chilling unit can continue to operate normally, and the operation stability and reliability of the water chilling unit are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of water chillers, and in particular to a water chiller control method and device, a water chiller and a storage medium. Background Art

[0002] Chillers are also called: freezers, refrigeration units, ice water units, cooling equipment, etc. Because they are widely used in various industries, the requirements for chillers are also different. Its working principle is a multifunctional machine that removes liquid vapor through compression or heat absorption refrigeration cycle. In the refrigeration industry, chillers are divided into air-cooled chillers and water-cooled chillers. According to the compressor, they are divided into screw chillers, vortex chillers, and centrifugal chillers.

[0003] For screw chillers, the unit load is mainly controlled by the chilled water outlet temperature or inlet temperature, and the overall unit load control is affected by multiple factors such as water temperature, pressure, and current. Therefore, if the sensor devices such as water temperature, pressure, and current fail, it may cause the unit load control to be abnormal or unable to be used normally. However, there is no relevant solution in the prior art to solve the above problems. Therefore, how to detect whether the sensor on the chiller is faulty to avoid abnormal load control or abnormal use of the chiller is a problem that technicians in this field need to solve. Summary of the invention

[0004] The embodiments of the present invention provide a chiller control method, device, chiller and storage medium, which are intended to perform abnormality detection on sensors of the chiller and improve the operating stability and reliability of the chiller.

[0005] In a first aspect, an embodiment of the present invention provides a chiller control method, comprising:

[0006] During the operation of the chiller, sensor data on the chiller is obtained; wherein the sensor data is the operating parameters of the chiller collected by sensors of different types installed at different positions of the chiller;

[0007] Determining whether there is a target sensor for detecting abnormality on the chiller according to the sensor data;

[0008] If it is determined that there is a target sensor with abnormal detection on the chiller, then the target sensor data of other sensors with normal detection are obtained;

[0009] The target sensor is calibrated using the target sensor data, and the calibrated target sensor is used to continue collecting operating parameters of the chiller.

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

[0011] A first acquisition unit is used to acquire sensor data on the chiller during the operation of the chiller; wherein the sensor data is the operating parameters of the chiller collected by sensors of different types installed at different positions of the chiller;

[0012] An abnormality detection unit, used for judging whether there is a target sensor for detecting abnormality on the chiller according to the sensor data;

[0013] A second acquisition unit is used to acquire target sensor data of other sensors that detect normal conditions if it is determined that there is a target sensor with abnormal detection on the chiller;

[0014] The calibration and acquisition unit is used to calibrate the target sensor using the target sensor data, and continue to acquire the operating parameters of the chiller using the calibrated target sensor.

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

[0016] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the chiller control method as described in the first aspect is implemented.

[0017] The embodiment of the present invention provides a chiller control method, device, chiller and storage medium, the method comprising: during the operation of the chiller, obtaining sensor data on the chiller; wherein the sensor data is for sensors of different types installed at different positions of the chiller to collect the operating parameters of the chiller; judging whether there is a target sensor for detecting abnormalities on the chiller according to the sensor data; if it is determined that there is a target sensor for detecting abnormalities on the chiller, obtaining target sensor data of other sensors for detecting normal sensors; calibrating the target sensor using the target sensor data, and continuing to collect the operating parameters of the chiller using the calibrated target sensor. The embodiment of the present invention detects whether the sensor on the chiller is abnormal through the collected sensor data, and further calibrates the sensor for detecting abnormalities through the sensor data, so that the sensor on the chiller can continue to operate normally, avoiding the abnormal sensor from affecting the normal operation of the chiller, thereby improving the operating stability and reliability of the chiller. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0019] Figure 1 A schematic flow chart of a chiller control method provided by an embodiment of the present invention;

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

[0021] Figure 3 A schematic diagram of a sub-flow chart of step S102 in a chiller control method provided by an embodiment of the present invention;

[0022] Figure 4 Another sub-flow diagram of step S102 in a chiller control method provided by an embodiment of the present invention;

[0023] Figure 5 A schematic diagram of a sub-flow chart of step S303 in a chiller control method provided by an embodiment of the present invention;

[0024] Figure 6 Another schematic diagram of a flow chart of a chiller control method provided by an embodiment of the present invention;

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

[0026] Figure 8 A first sub-schematic block diagram of a chiller control device provided by an embodiment of the present invention;

[0027] Fig. 9 A second sub-schematic block diagram of a chiller control device provided by an embodiment of the present invention;

[0028] Fig.10 A third sub-schematic block diagram of a chiller control device provided by an embodiment of the present invention;

[0029] Fig.11 Another schematic block diagram of a chiller control device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

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

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

[0034] See below Figure 1 , an embodiment of the present invention provides a chiller control method, which specifically includes: steps S101 to S104.

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

[0036] Step S102, judging whether there is a target sensor for detecting abnormality on the chiller according to the sensor data;

[0037] Step S103: if it is determined that there is a target sensor with abnormal detection on the chiller, then the target sensor data of other sensors with normal detection are obtained;

[0038] Step S104: calibrate the target sensor using the target sensor data, and continue to collect operating parameters of the chiller using the calibrated target sensor.

[0039] In this embodiment, when the chiller is running, the operating parameters of the chiller are first collected through the sensors on the chiller and used as sensor data, and then it is determined whether the sensors on the chiller are abnormal based on the sensor data. If all sensors on the chiller are normal, the chiller is controlled to continue running, and the operating parameters are continuously collected through the sensors. If a sensor on the chiller is abnormal, the sensor with the abnormality is calibrated through the sensor data collected by the sensor without the abnormality, and after the calibration is completed, the operating parameters of the chiller are continuously collected.

[0040] This embodiment detects whether there is any abnormality in the sensors on the chiller through the collected sensor data, and further corrects the sensors that detect the abnormality through the sensor data, so that the sensors on the chiller can continue to operate normally, avoiding the abnormal sensors from affecting the normal operation of the chiller, thereby improving the operating stability and reliability of the chiller.

[0041] In a practical application scenario, combined with Figure 2 The operating parameters of the chiller include temperature parameters, pressure parameters and current parameters, wherein the temperature parameters specifically include chilled 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; the current parameters include compressor current. Accordingly, in order to complete the collection of operating parameters, a sensor can be set for each of the above parameters, such as a sensor for collecting chilled water temperature, a sensor for collecting cooling water temperature, a sensor for collecting exhaust temperature, and so on.

[0042] In one embodiment, if Figure 3 As shown, the step S102 includes: steps S201 to S207.

[0043] Step S201, obtaining the chilled water inlet temperature, chilled water outlet temperature and actual water flow rate of the chiller on the freezing side according to the sensor data;

[0044] Step S202, calculating the first actual heat exchange capacity of the chiller on the freezing side according to the chilled water inlet temperature, the chilled water outlet temperature and the actual water flow rate;

[0045] Step S203, obtaining the subcooling point temperature and the subcooling point pressure at the outlet of the refrigerant side of the chiller according to the sensor data, and obtaining the superheat temperature and the superheat pressure at the inlet of the evaporator of the chiller;

[0046] Step S204, calculating a second actual heat exchange capacity of the chiller on the refrigerant side according to the subcooling point temperature and the subcooling point pressure as well as the superheat temperature and the superheat pressure;

[0047] Step S205: obtaining a first heat exchange difference between the first actual heat exchange amount and the second actual heat exchange amount, and comparing the first heat exchange difference with a preset first difference threshold;

[0048] Step S206: If the first heat exchange amount difference does not reach the preset first difference threshold, it is determined that there is no target sensor for detecting abnormality on the chiller;

[0049] Step S207: If the first heat exchange amount difference reaches a preset first difference threshold, it is determined that there is a target sensor with abnormal detection on the chiller.

[0050] In this embodiment, during the operation of the chiller, in terms of the calculation of the cooling capacity of the water system, the actual water flow H, the chilled water inlet temperature T1 and the chilled water outlet temperature T2 can be collected by sensors, thereby calculating the first actual heat exchange capacity Q1 of the chiller on the freezing side. At the same time, in terms of the refrigerant circulation system, the subcooling point temperature T3 and the pressure P3 can be detected by the sensor set at the outlet position of the condenser side, and the superheat temperature T4 and the pressure P4 can be detected by the sensor set at the inlet of the evaporator, and the first enthalpy value in this state can be further calculated according to the subcooling 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, thereby calculating the second actual heat exchange capacity Q2 of the chiller on the refrigerant side based on the first enthalpy value and the second enthalpy value.

[0051] After obtaining the first actual heat exchange amount Q1 and the second actual heat exchange amount Q2, the heat exchange amounts Q1 and Q2 on the freezing side and the refrigerant side can be compared and analyzed. That is, if the difference between Q1 and Q2 is less than A% (i.e., the preset first difference threshold), it is assumed that the current deviation is within the allowable deviation range, so the chiller can continue to operate in 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, so it is determined that the sensor of the chiller is abnormal.

[0052] In addition, in actual application scenarios, the evaporation pressure of the chiller has the same replacement scheme as the inlet and outlet water temperatures on the freezing side, that is, the evaporation pressure corresponds to the evaporation temperature of the unit, and the evaporation temperature and suction pressure are also a set of values ​​that can be replaced with each other.

[0053] Furthermore, in one embodiment, if Figure 4 As shown, the step S102 also includes: steps S301 to S303.

[0054] Step S301, acquiring the exhaust volume of the compressor in the chiller according to the sensor data, and calculating the refrigerant mass flow rate in the chiller according to the exhaust volume of the compressor;

[0055] Step S302, calculating the third actual heat exchange capacity of the chiller on the evaporator side by combining the refrigerant mass flow rate and the chilled water inlet temperature, the chilled water outlet temperature, and the superheat temperature;

[0056] Step S303: Compare the third actual heat exchange amount 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 chiller.

[0057] In this embodiment, after detecting that the sensor of the chiller is abnormal, it is also necessary to accurately locate the sensor with the abnormality, that is, to determine which position of the sensor is abnormal, so that the subsequent correction operation can be performed more accurately and quickly. Specifically, after obtaining the first actual heat exchange Q1 of the chiller on the freezing side and the second actual heat exchange Q2 on the refrigerant side, the third actual heat exchange Q3 of the chiller on the evaporator side is calculated through the sensor data, so that Q1 and Q2 are compared and analyzed respectively through Q3 to determine whether Q1 or Q2 is abnormal.

[0058] Specifically, if Figure 5 As shown, the step S303 includes: steps S401 to S404.

[0059] Step S401, obtaining a second heat exchange difference between the third actual heat exchange amount and the first actual heat exchange amount, and comparing the second heat exchange difference with a preset second difference threshold;

[0060] Step S402: if the second heat exchange amount difference value does not reach the preset second difference threshold value, it is determined that there is no target sensor for detecting abnormality on the freezing side of the chiller; if the second heat exchange amount difference value reaches the preset second difference threshold value, it is determined that there is a target sensor for detecting abnormality on the freezing side of the chiller;

[0061] Step S403, obtaining a third heat exchange difference between the third actual heat exchange amount and the second actual heat exchange amount, and comparing the third heat exchange difference with a preset second difference threshold;

[0062] Step S404: If the third heat exchange difference does not reach the preset second difference threshold, it is determined that there is no target sensor for detecting abnormalities on the refrigerant side of the chiller; if the third heat exchange difference reaches the preset second difference threshold, it is determined that there is a target sensor for detecting abnormalities on the refrigerant side of the chiller.

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

[0064] Of course, it is understandable that in some optional embodiments, the actual heat exchange of the chiller on the refrigerant side and the evaporator side can be calculated respectively through sensor data, and when the actual heat exchange of the refrigerant side and the evaporator side is abnormal, the actual heat exchange of the refrigeration side is compared and analyzed to determine the specific location of the abnormal sensor. Alternatively, the actual heat exchange of the chiller on the refrigeration side and the evaporator side can be calculated respectively through sensor data, and when the actual heat exchange of the refrigeration side and the evaporator side is abnormal, the actual heat exchange of the refrigerant side is compared and analyzed to determine the specific location of the abnormal sensor.

[0065] In one embodiment, the step S104 includes:

[0066] When it is determined that there is a target sensor with abnormal detection 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 used as a fourth actual heat exchange amount;

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

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

[0069] When it is determined that there is a target sensor with abnormal detection 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 used as the fifth actual heat exchange amount;

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

[0071] In this embodiment, after the sensor is detected to be abnormal and its position is accurately located, the abnormal sensor can be calibrated. Specifically, if the first actual heat exchange value on the refrigeration side is abnormal, then the second actual heat exchange value on the refrigerant side and the third actual heat exchange value on the evaporator side are averaged, and the average value is used as the fourth actual heat exchange value; or, if the second actual heat exchange value on the refrigerant side is abnormal, then the first actual heat exchange value on the refrigeration side and the third actual heat exchange value on the evaporator side are averaged, and the average value is used as the fifth actual heat exchange value; then, the parameters are reversed according to the fourth actual heat exchange value or the second actual heat exchange value, so as to obtain the parameter value of the normal situation, and the abnormal sensor is calibrated accordingly.

[0072] For example, when the first actual heat exchange rate on the refrigeration side is abnormal, the fourth actual heat exchange rate is calculated by the second actual heat exchange rate on the refrigerant side and the third actual heat exchange rate on the evaporator side, and then the fourth actual heat exchange rate 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) , thereby obtaining the accurately corrected cooling water temperature and freezing water temperature, and then calibrating the corresponding sensors according to the accurately corrected cooling water temperature and freezing water temperature.

[0073] In one embodiment, if Figure 6 As shown, after step S104, the process includes steps S501 to S503.

[0074] Step S501, continue to obtain sensor data, and perform abnormality judgment on the target sensor based on the sensor data;

[0075] Step S502: If it is determined that the target sensor has no abnormality, continue to collect the operating parameters of the chiller using the target sensor;

[0076] Step S503: If it is determined that the target sensor is abnormal, a sensor of the same type as the target sensor is obtained, and the target sensor is replaced by the sensor of the same type, and then the operating parameters of the chiller are continued to be collected.

[0077] In this embodiment, after the sensor calibration is completed, the operating parameters of the chiller will continue to be collected through the calibrated sensor. If the sensor is still detected to be abnormal during the subsequent collection process, the abnormal sensor will be replaced by a sensor of the same type to ensure that the chiller can operate stably and normally. For example, if the sensor used to collect the exhaust temperature is abnormal and cannot return to normal after calibration, the sensor used to collect the condensing temperature can be used to replace the sensor used to collect the exhaust temperature. For another example, for the compressor current, the three-phase current of the compressor U, V, and W is actually detected. Therefore, when one of the phases is abnormal and cannot be calibrated, it can be replaced by the other two phases.

[0078] Figure 7 A schematic block diagram of a chiller control device 600 provided in an embodiment of the present invention, the device 600 includes:

[0079] The first acquisition unit 601 is used to acquire sensor data on the chiller during the operation of the chiller; wherein the sensor data is the operating parameters of the chiller collected by sensors of different types installed at different positions of the chiller;

[0080] An abnormality detection unit 602, used to determine whether there is a target sensor for detecting abnormality on the chiller according to the sensor data;

[0081] The second acquisition unit 603 is used to acquire target sensor data of other sensors that are detecting normally if it is determined that there is a target sensor with detection abnormality on the chiller;

[0082] The calibration and acquisition unit 604 is used to calibrate the target sensor using the target sensor data, and continue to acquire the operating parameters of the chiller using the calibrated target sensor.

[0083] In one embodiment, if Figure 8 As shown, the abnormality detection unit 602 includes:

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

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

[0086] The refrigerant side acquisition unit 703 is used to acquire the subcooling point temperature and the subcooling point pressure at the outlet of the refrigerant side of the chiller according to the sensor data, and to acquire the superheat temperature and the superheat pressure at the inlet of the evaporator of the chiller;

[0087] The second calculation unit 704 is used to calculate the second actual heat exchange amount of the chiller on the refrigerant side according to the subcooling point temperature and the subcooling point pressure and the superheating temperature and the superheating pressure;

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

[0089] A first determination unit 706 is configured to determine that no target sensor for detecting abnormality exists on the chiller if the first heat exchange amount difference value does not reach a preset first difference threshold value;

[0090] The second determination unit 707 is configured to determine whether a target sensor with abnormal detection exists on the chiller if the first heat exchange amount difference reaches a preset first difference threshold.

[0091] In one embodiment, if Fig. 9 As shown, the abnormality detection unit 602 also includes:

[0092] A flow calculation unit 801 is used to obtain the compressor exhaust volume in the chiller according to the sensor data, and calculate the refrigerant mass flow rate in the chiller according to the compressor exhaust volume;

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

[0095] In one embodiment, if Fig.10 As shown, the heat exchange amount comparison unit 803 includes:

[0096] A first comparing unit 901 is used to obtain a second heat exchange difference between the third actual heat exchange value and the first actual heat exchange value, and compare the second heat exchange difference with a preset second difference threshold;

[0097] The third determination unit 902 is configured to determine that there is no target sensor for detecting abnormality on the freezing side of the chiller if the second heat exchange difference value does not reach a preset second difference threshold value; and to determine that there is a target sensor for detecting abnormality on the freezing side of the chiller if the second heat exchange difference value reaches a preset second difference threshold value;

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

[0099] The fourth determination unit 904 is used to determine that there is no target sensor for detecting abnormalities on the refrigerant side of the chiller if the third heat exchange difference does not reach the preset second difference threshold; if the third heat exchange difference reaches the preset second difference threshold, it is used to determine that there is a target sensor for detecting abnormalities on the refrigerant side of the chiller.

[0100] In one embodiment, the correction acquisition unit 604 includes:

[0101] a first average calculation unit, configured to calculate a first average value between the second actual heat exchange amount and the third actual heat exchange amount when it is determined that there is a target sensor detecting an abnormality on the freezing side of the chiller, and use the first average value as a fourth actual heat exchange amount;

[0102] A first calibration unit, configured to obtain a calibrated water inlet temperature and a calibrated water outlet temperature of the chiller on a freezing side according to the fourth actual heat exchange amount, and calibrate the target sensor based on the calibrated water inlet temperature and the calibrated water outlet temperature;

[0103] In one embodiment, the correction acquisition unit 604 further includes:

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

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

[0106] In one embodiment, if Fig.11 As shown, the chiller control device 600 also includes:

[0107] The abnormality judgment unit 1001 is used to continue to obtain sensor data and judge the abnormality of the target sensor through the sensor data;

[0108] The first collection unit 1002 is used to continue to collect the operating parameters of the chiller using the target sensor if it is determined that the target sensor has no abnormality;

[0109] The second acquisition unit 1003 is used to obtain a sensor of the same type as the target sensor if it is determined that the target sensor is abnormal, and use the sensor of the same type to replace the target sensor, and then continue to collect the operating parameters of the chiller.

[0110] Since the embodiments of the apparatus part correspond to the embodiments of the method part, please refer to the description of the embodiments of the method part for the embodiments of the apparatus part, which will not be repeated here.

[0111] The embodiment of the present invention further provides a computer-readable storage medium on which a computer program is stored, and when the computer program is executed, the steps provided in the above embodiment can be implemented. The storage medium may include: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and other media that can store program codes.

[0112] The present invention also provides a chiller, which may include a memory and a processor, wherein a computer program is stored in the memory, and when the processor calls the computer program in the memory, the steps provided in the above embodiment may be implemented. Of course, the chiller may also include various network interfaces, power supplies and other components.

[0113] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referred to each other. For the system disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of this application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of this application.

[0114] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

Claims

1. A chiller control method, characterized in that: include: During the operation of the chiller, sensor data on the chiller is obtained; wherein the sensor data is the operating parameters of the chiller collected by sensors of different types installed at different positions of the chiller; Determining whether there is a target sensor for detecting abnormality on the chiller according to the sensor data; If it is determined that there is a target sensor with abnormal detection on the chiller, then the target sensor data of other sensors with normal detection are obtained; The target sensor is calibrated using the target sensor data, and the calibrated target sensor is used to continue collecting operating parameters of the chiller.

2. The chiller control method according to claim 1, characterized in that: The step of judging whether there is a target sensor for detecting abnormality on the chiller according to the sensor data includes: Acquire the chilled water inlet temperature, chilled water outlet temperature and actual water flow rate of the chiller on the freezing side according to the sensor data; Calculate the first actual heat exchange amount of the chiller on the freezing side according to the chilled water inlet temperature, the chilled water outlet temperature and the actual water flow rate; Acquire the subcooling point temperature and the subcooling point pressure at the outlet of the refrigerant side of the chiller according to the sensor data, and acquire the superheat temperature and the superheat pressure at the inlet of the evaporator of the chiller; The second actual heat exchange amount of the chiller on the refrigerant side is calculated according to the subcooling point temperature and the subcooling point pressure as well as the superheating temperature and the superheating pressure; Obtaining a first heat exchange difference between the first actual heat exchange value and the second actual heat exchange value, and comparing the first heat exchange difference with a preset first difference threshold; If the first heat exchange amount difference value does not reach the preset first difference value threshold value, it is determined that there is no target sensor for detecting abnormality on the chiller; If the first heat exchange amount difference reaches a preset first difference threshold, it is determined that there is a target sensor with abnormal detection on the chiller.

3. The chiller control method according to claim 2, characterized in that: The step of judging whether there is a target sensor for detecting abnormality on the chiller according to the sensor data also includes: Acquire the compressor exhaust volume in the chiller according to the sensor data, and calculate the refrigerant mass flow rate in the chiller according to the compressor exhaust volume; The third actual heat exchange capacity of the chiller on the evaporator side is calculated by combining the refrigerant mass flow rate and the chilled water inlet temperature, the chilled water outlet temperature, and 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 chiller.

4. The chiller control method according to claim 3, characterized in that: The step of comparing the third actual heat exchange amount with the first actual heat exchange amount and the second actual heat exchange amount respectively to determine whether a target sensor having a detection abnormality exists on the freezing side or the refrigerant side of the chiller comprises: Obtaining a second heat exchange difference between the third actual heat exchange value and the first actual heat exchange value, and comparing the second heat exchange difference with a preset second difference threshold; If the second heat exchange amount difference value does not reach the preset second difference threshold value, it is determined that there is no target sensor for detecting abnormality on the freezing side of the chiller; if the second heat exchange amount difference value reaches the preset second difference threshold value, it is determined that there is a target sensor for detecting abnormality on the freezing side of the chiller; Obtaining a third heat exchange difference between the third actual heat exchange value and the second actual heat exchange value, and comparing the third heat exchange difference with a preset second difference threshold; If the third heat exchange difference does not reach the preset second difference threshold, it is determined that there is no target sensor for detecting abnormalities on the refrigerant side of the chiller; if the third heat exchange difference reaches the preset second difference threshold, it is determined that there is a target sensor for detecting abnormalities on the refrigerant side of the chiller.

5. The chiller control method according to claim 4, characterized in that: The method of calibrating the target sensor using the target sensor data and continuing to collect the operating parameters of the chiller using the calibrated target sensor includes: When it is determined that there is a target sensor with abnormal detection 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 used as a fourth actual heat exchange amount; The corrected water inlet temperature and the corrected water outlet temperature of the chiller on the freezing side are obtained by conversion according to the fourth actual heat exchange amount, and the target sensor is calibrated based on the corrected water inlet temperature and the corrected water outlet temperature.

6. The chiller control method according to claim 4, characterized in that: The method of calibrating the target sensor using the target sensor data and continuing to collect the operating parameters of the chiller using the calibrated target sensor further includes: When it is determined that there is a target sensor with abnormal detection 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 used as the fifth actual heat exchange amount; The corrected supercooling point temperature of the chiller on the refrigerant side is obtained by conversion according to the fifth actual heat exchange amount, and the target sensor is calibrated based on the corrected supercooling point temperature.

7. The chiller control method according to claim 1, characterized in that: After the step of calibrating the target sensor using the target sensor data and continuing to collect the operating parameters of the chiller using the calibrated target sensor, the method further comprises: Continue to acquire sensor data, and determine abnormality of the target sensor based on the sensor data; If it is determined that there is no abnormality in the target sensor, the target sensor is used to continue collecting the operating parameters of the chiller; If it is determined that the target sensor is abnormal, a sensor of the same type as the target sensor is obtained and used to replace the target sensor, and then the operating parameters of the chiller are continuously collected.

8. A chiller control device, characterized in that: include: A first acquisition unit is used to acquire sensor data on the chiller during the operation of the chiller; wherein the sensor data is the operating parameters of the chiller collected by sensors of different types installed at different positions of the chiller; An abnormality detection unit, used for judging whether there is a target sensor for detecting abnormality on the chiller according to the sensor data; A second acquisition unit is used to acquire target sensor data of other sensors that are detecting normally if it is determined that there is a target sensor detecting abnormality on the chiller; The calibration and acquisition unit is used to calibrate the target sensor using the target sensor data, and continue to acquire the operating parameters of the chiller using the calibrated target sensor.

9. A chiller, characterized in that: The method comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the chiller control method according to any one of claims 1 to 7 when executing the computer program.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the chiller control method according to any one of claims 1 to 7 is implemented.

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