Liquid leakage detection method for liquid circulation system, liquid leakage detection device, and storage medium

Abstract

The application discloses a liquid leakage detection method and device of a liquid circulation system and a storage medium. The liquid circulation system comprises a terminal device, a circulating pump and a control valve. The method comprises the following steps: acquiring pressure state parameters and temperature state parameters of circulating liquid in the liquid circulation system within a target time period; determining a liquid leakage characteristic value within the target time period according to the pressure state parameters and the temperature state parameters; and determining that the liquid circulation system has a liquid leakage risk when the liquid leakage characteristic value meets preset conditions of liquid leakage of the liquid circulation system. The application aims to improve the timeliness of liquid leakage risk identification of the liquid circulation system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrical appliances, and in particular to a liquid leakage detection method for a liquid circulation system, a liquid leakage detection device and a storage medium. BACKGROUND

[0002] Many electrical appliances are provided with a liquid circulation system (for example, a water circuit system of an environmental conditioning device), and energy is transmitted through liquid circulation to meet user needs.

[0003] During use of the liquid circulation system, liquid leakage may occur when the pipeline is aged or abnormally corroded or damaged by external force. Currently, the leakage of the system is detected manually, which may result in delayed detection of the leakage and damage to the system. SUMMARY

[0004] The main purpose of the present application is to provide a liquid leakage detection method for a liquid circulation system, a liquid leakage detection device and a storage medium, so as to improve the timeliness of liquid leakage risk identification for the liquid circulation system.

[0005] To achieve the above purpose, the present application provides a liquid leakage detection method for a liquid circulation system, which comprises the following steps:

[0006] Obtaining pressure state parameters and temperature state parameters of circulating liquid in the liquid circulation system within a target time period;

[0007] Determining a liquid leakage characteristic value within the target time period according to the pressure state parameters and the temperature state parameters;

[0008] When the liquid leakage characteristic value meets a preset condition of liquid leakage of the liquid circulation system, it is determined that the liquid circulation system has a liquid leakage risk.

[0009] Optionally, the liquid leakage characteristic value comprises a pressure drop value of the circulating liquid within the target time period, and the preset condition comprises that the pressure drop value is greater than or equal to a preset value.

[0010] Optionally, the liquid leakage characteristic value comprises a pressure drop value of the circulating liquid within the target time period, and the step of determining the liquid leakage characteristic value within the target time period according to the pressure state parameters and the temperature state parameters comprises:

[0011] Determining a reference value of pressure drop of the circulating liquid within the target time period according to the pressure state parameters;

[0012] Determining a target pressure correction value according to the pressure state parameters and the temperature state parameters;

[0013] Correcting the reference value according to the target pressure correction value to obtain the pressure drop value.

[0014] Optionally, the pressure state parameter comprises a first pressure at a starting time of the target time period, a second pressure at an ending time of the target time period, and a pressure change value when the operating state of the liquid circulating system changes in the target time period, and the step of determining the reference value of the circulating liquid pressure drop in the target time period according to the pressure state parameter comprises:

[0015] determining a difference between the first pressure and the second pressure as the reference value;

[0016] The step of determining the target pressure correction value according to the pressure state parameter and the temperature state parameter comprises:

[0017] determining the target pressure correction value according to the pressure change value and the temperature state parameter.

[0018] Optionally, the temperature state parameter comprises a first temperature at a starting time of the target time period and a second temperature at an ending time of the target time period, and the step of determining the target pressure correction value according to the pressure change value and the temperature state parameter comprises:

[0019] determining a first pressure correction value according to the pressure change value;

[0020] determining a second pressure correction value according to the first temperature and the second temperature;

[0021] determining the target pressure correction value according to the first pressure correction value and the second pressure correction value.

[0022] Optionally, the step of determining the second pressure correction value according to the first temperature and the second temperature comprises:

[0023] determining a volume change value of the circulating liquid of the liquid circulating system in the target time period according to the first temperature and the second temperature;

[0024] determining the second pressure correction value according to the volume change value.

[0025] Optionally, the liquid circulating system further comprises an expansion tank, and before the step of determining the second pressure correction value according to the volume change value, the method further comprises:

[0026] obtaining a volume of the expansion tank and a gas pre-charge pressure of the expansion tank;

[0027] establishing a target correspondence between the volume change value and the second pressure correction value according to the volume and the gas pre-charge pressure;

[0028] The step of determining the second pressure correction value according to the volume change value comprises:

[0029] The second pressure correction value corresponding to the volume change value is determined based on the target correspondence.

[0030] Optionally, the step of determining the volume change value of the circulating liquid of the liquid circulating system in the target time period according to the first temperature and the second temperature comprises:

[0031] The first density of the circulating liquid in the liquid circulating system at the starting time is determined according to the first temperature, and the second density of the circulating liquid in the liquid circulating system at the ending time is determined according to the second temperature.

[0032] The density difference between the first density and the second density is determined.

[0033] The volume change value is determined according to the density difference and the mass of the filled liquid in the liquid circulating system.

[0034] Optionally, the liquid circulating system comprises a terminal device, a circulating pump and a control valve for controlling the fluid flow in the terminal device, and the step of obtaining the pressure change value comprises:

[0035] The device in the circulating pump and the control valve that occurs switching action in the target time period is determined as a target load, the change value of the fluid pressure detected by the liquid circulating system before and after the target load occurs switching action is obtained, and the pressure change value is determined according to the change value of the fluid pressure.

[0036] Optionally, the liquid circulating system comprises at least two terminal devices and at least two control valves, and the terminal device and the control valve are one-to-one correspondingly arranged, and the step of determining the pressure change value according to the change value comprises:

[0037] The change value of a target proportion before and after the target load occurs switching action is obtained, the target proportion being the ratio of the number of the control valves opened to the number of the control valves closed;

[0038] The change value of the fluid pressure is corrected according to the change value of the proportion, and the pressure change value is obtained.

[0039] In addition, in order to achieve the above-mentioned purpose, the present application further provides a liquid leakage detection device, which comprises a memory, a processor, and a liquid leakage detection program of a liquid circulating system stored in the memory and executable on the processor, and the liquid leakage detection program of the liquid circulating system implements the steps of the liquid leakage detection method of any one of the above-mentioned liquid circulating systems when executed by the processor.

[0040] In addition, in order to achieve the above-mentioned object, the application further provides a storage medium, wherein the storage medium stores a liquid leakage detection program of a liquid circulation system, and the liquid leakage detection program realizes the steps of the liquid leakage detection method of any one of the above-mentioned liquid leakage detection programs when executed by a processor.

[0041] The application provides a liquid leakage detection method of a liquid circulation system, which determines a liquid leakage characteristic value in a target time period by combining a pressure state parameter and a temperature state parameter of circulating liquid in the liquid circulation system in the target time period, and determines that there is a liquid leakage risk of the liquid circulation system when the liquid leakage characteristic value meets a liquid leakage condition, so that the liquid leakage condition of the system can be monitored during the operation of the system without manual participation, and the timeliness of the liquid leakage risk identification of the liquid circulation system is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 FIG. 1 is a system structure schematic diagram of an embodiment of the liquid circulation system of the application and a system structure schematic diagram of the liquid circulation system connected with a heat pump system for heat exchange;

[0043] Figure 2 FIG. 2 is a hardware structure schematic diagram of an embodiment of the liquid circulation system of the application;

[0044] Figure 3 FIG. 3 is a flowchart of an embodiment of the liquid leakage detection method of the liquid circulation system of the application;

[0045] Figure 4 FIG. 4 is a flowchart of another embodiment of the liquid leakage detection method of the liquid circulation system of the application;

[0046] Figure 5 FIG. 5 is a flowchart of still another embodiment of the liquid leakage detection method of the liquid circulation system of the application.

[0047] The implementation, functional characteristics and advantages of the application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0048] It should be understood that the specific embodiments described herein are only used to explain the application, and are not used to limit the application.

[0049] The embodiment of the present application provides a liquid leakage detection device 100. In the embodiment, the liquid leakage detection device 100 is an environmental regulation device with a liquid leakage detection function, the environmental regulation device comprises a liquid circulation system 1 and the liquid leakage detection device 100, and the liquid circulation system 1 is connected with the liquid leakage detection device 100. The environmental regulation system comprises a heat pump system 2 and the liquid circulation system 1, and the heat pump system 2 is in heat exchange connection with the liquid circulation system 1. In other embodiments, the liquid leakage detection device 100 can also be a detection device arranged independently of the liquid circulation system 1, and the liquid leakage detection device 100 is connected with the liquid circulation system 1.

[0050] In the embodiment, referring to Figure 1 , the liquid circulation system 1 detected by the liquid leakage detection device 100 comprises a circulating pump 11, a control valve 12 and a terminal device 13.

[0051] The circulating pump 11 is used for driving liquid to circulate in the liquid circulation system 1.

[0052] The control valve 12 is used for controlling fluid flow in the terminal device 13.

[0053] The terminal device 13 is arranged in an indoor environment and adjusts the indoor environment by using energy output by the flowing refrigerant. The terminal device 13 comprises a convection heat exchange device or a radiation heat exchange device, for example, the terminal device 13 can comprise a fan coil, a heat dissipation fin, floor heating and the like.

[0054] The number of the terminal devices 13 can be one or more than one, and the more than one terminal devices 13 can be arranged in different indoor spaces respectively, and the types of the terminal devices 13 in different indoor spaces can be the same or different.

[0055] In the embodiment, the liquid circulation system 1 comprises at least two terminal devices 13 and at least two control valves 12, and the terminal devices 13 and the control valves 12 are in one-to-one correspondence and are connected in series.

[0056] The liquid circulation system 1 further comprises a temperature sensor 01 arranged in a pipeline of the liquid circulation system 1 to detect the temperature of the circulating liquid.

[0057] The liquid circulation system 1 further comprises a pressure sensor 02 arranged in the pipeline of the liquid circulation system 1 to detect the pressure of the circulating liquid.

[0058] Further, the liquid circulation system 1 further comprises an expansion tank 14.

[0059] Further, the liquid circulation system 1 further comprises a heat exchange part, and the heat exchange part is in heat exchange connection with a heat exchanger in the heat pump system 2. The temperature sensor 01 and the pressure sensor 02 can be arranged on the liquid inlet side of the heat exchange part.

[0060] In the embodiment of the present application, referring toFigure 2 The liquid leakage detection device 100 comprises a processor 1001, such as a CPU, a memory 1002, and a timer 1003. These components are connected in communication through a communication bus. The memory 1002 can be a high-speed RAM memory, or a stable memory (non-volatile memory), such as a disk memory. The memory 1002 can optionally be a storage device independent of the aforementioned processor 1001.

[0061] The liquid leakage detection device 100 is connected with the aforementioned temperature sensor 01 to obtain temperature detection data of the temperature sensor 01.

[0062] The liquid leakage detection device 100 is connected with the aforementioned pressure sensor 02 to obtain pressure detection data of the pressure sensor 02.

[0063] The liquid leakage detection device 100 is connected with the aforementioned circulating pump 11 to obtain operation state data of the circulating pump 11.

[0064] The liquid leakage detection device 100 is connected with the aforementioned control valve 12 to obtain operation state data of the control valve 12.

[0065] Those skilled in the art can understand that, Figure 2 The device structure shown in the above embodiments does not constitute a limitation on the device, and can include more or fewer components than shown, or combine certain components, or different component arrangements.

[0066] As shown in Figure 2 The memory 1002, as a computer storage medium, can include a liquid leakage detection program of a liquid circulating system.

[0067] In the device shown in Figure 2 The processor 1001 can be used to call the liquid leakage detection program of the liquid circulating system stored in the memory 1002, and perform the related step operations of the liquid leakage detection method of the liquid circulating system in the following embodiments.

[0068] The present embodiment also provides a liquid leakage detection method of a liquid circulating system, applied to the aforementioned liquid leakage detection device.

[0069] Referring to Figure 3 , an embodiment of the liquid leakage detection method of the liquid circulating system is proposed. In this embodiment, the liquid leakage detection method of the liquid circulating system comprises:

[0070] Step S10, obtaining pressure state parameters and temperature state parameters of a circulating liquid in the liquid circulating system within a target time period;

[0071] The pressure state parameter can reflect the pressure condition at different times in the target time period, and can include an instantaneous pressure value and / or a pressure change value. The pressure state parameter includes, but is not limited to, any one or more of a pressure value at a starting time, a pressure value at an ending time, a pressure value at an intermediate time, a pressure change value in different sub-time periods, a pressure value or a pressure change value when a component of the liquid circulating system operates to reach a preset condition. The pressure state parameter can be determined according to pressure data detected by a pressure sensor.

[0072] The temperature state parameter can reflect the temperature condition at different times in the target time period, and can include an instantaneous temperature value and / or a temperature change value. The temperature state parameter includes, but is not limited to, any one or more of a temperature value at a starting time, a temperature value at an ending time, a temperature value at an intermediate time, a temperature change value in different sub-time periods, a temperature value or a temperature change value when a component of the liquid circulating system operates to reach a preset condition. The temperature state parameter can be determined according to temperature data detected by a temperature sensor.

[0073] In this embodiment, the liquid circulating system is in heat exchange connection with the heat pump system, and step S10 is performed when the heat pump system is in an open state.

[0074] In step S20, a leakage feature value in the target time period is determined according to the pressure state parameter and the temperature state parameter.

[0075] The leakage feature value characterizes a feature value of the liquid leakage condition in the entire process of the target time period, and can include a temperature value and / or a pressure value, etc. In this embodiment, the leakage feature value includes a pressure drop value, and the pressure drop value specifically characterizes a pressure drop condition caused by the liquid leakage in the entire process of the target time period.

[0076] Different pressure state parameters and different temperature state parameters correspond to different leakage feature values. Specifically, a corresponding relationship between the pressure state parameter, the temperature state parameter, and the leakage feature value can be established in advance, and the corresponding relationship can include a calculation formula, a mapping relationship, etc. Based on the corresponding relationship, the leakage feature value corresponding to the pressure state parameter and the temperature state parameter can be determined.

[0077] In addition, in order to improve the detection accuracy, the corresponding relationship between the pressure state parameter, the temperature state parameter and the liquid leakage characteristic value is obtained according to the actual operation of the liquid circulating system. Specifically, the heat exchange part of the liquid circulating system is in heat exchange connection with the heat pump system, the liquid circulating system is in heat exchange connection with the gas system through the heat exchange device, the first temperature of the heat exchange part, the second temperature of the heat exchange device and the ambient temperature of the environment where the liquid circulating system is located are obtained when the gas system and the heat pump system are both turned on, the target corresponding relationship between the pressure state parameter, the temperature state parameter and the liquid leakage characteristic value is obtained according to the first temperature, the second temperature and the ambient temperature, and the liquid leakage characteristic value corresponding to the pressure state parameter and the temperature state parameter is determined based on the target corresponding relationship.

[0078] Step S30, when the liquid leakage characteristic value meets the preset condition of the liquid leakage of the liquid circulating system, it is determined that the liquid circulating system has a risk of liquid leakage.

[0079] The preset condition is a target value range that the liquid leakage characteristic value needs to reach when the liquid circulating system leaks or a target size relationship or a target quantity relationship between the target threshold value.

[0080] In this embodiment, the liquid leakage characteristic value includes the pressure drop value of the circulating liquid in the target time period, and the preset condition includes that the pressure drop value is greater than or equal to a preset value.

[0081] The preset value is specifically a value greater than 0. When the pressure drop value is greater than the preset value, it can be considered that the pressure in the liquid circulating system has dropped sharply due to liquid leakage. When it is determined that the liquid circulating system has a risk of liquid leakage, corresponding prompt information can be output, and the prompt information includes one or more than one of text, image, sound, vibration and the like. The user can discover the liquid leakage of the liquid circulating system in time and perform maintenance through the prompt information; and / or, when it is determined that the liquid circulating system has a risk of liquid leakage, the heat pump system in heat exchange connection with the liquid circulating system can be controlled to stop, and the circulating pump can be controlled to be closed. Alternatively, when it is determined that the liquid circulating system has a risk of liquid leakage, the compressor in the heat pump system in heat exchange connection with the liquid circulating system is controlled to adjust the operating frequency, and when the operating frequency adjustment time reaches a preset time, the pressure state parameter and the temperature state parameter of the circulating liquid in the liquid circulating system in the target time period are obtained, the pressure drop value of the circulating liquid in the target time period is determined according to the pressure state parameter and the temperature state parameter, when the pressure drop value is greater than the preset value, it is determined that the liquid circulating system has a risk of liquid leakage, the heat pump system is controlled to stop and the prompt information is output.

[0082] The preset value can be a pre-set fixed value, or a value determined according to an actual running state of the liquid circulation system. For example, when the heat pump system runs in a cooling mode, a first value is determined as the preset value; when the heat pump system runs in a heating mode, a second value is determined as the preset value; further, the number of open control valves and the indoor environment temperature of the space where the corresponding terminal equipment is located are obtained, and a correction value is determined according to the number and the corresponding indoor environment temperature; when the heat pump system runs in the cooling mode, the first value is corrected according to the correction value to obtain the preset value; and when the heat pump system runs in the heating mode, the second value is corrected according to the correction value to obtain the preset value. Based on this, it can be ensured that the situation that the indoor heat exchange demand cannot be met due to the leakage of the circulating liquid in the system can be found in time, thereby being beneficial to improving the comfort of the environment where the terminal equipment is located.

[0083] Further, after step S30, step S10 can be returned to be executed at intervals of a preset time length.

[0084] In addition, when the leakage characteristic value does not satisfy the preset condition of the leakage of the liquid circulation system, it can be determined that the liquid circulation system has no leakage risk.

[0085] The leakage detection method for the liquid circulation system provided in the embodiment of the present application determines a leakage characteristic value in a target time period in combination with a pressure state parameter and a temperature state parameter of the circulating liquid in the liquid circulation system in the time period, and determines that the liquid circulation system has a leakage risk when the leakage characteristic value satisfies a leakage condition, so that the leakage of the system can be monitored in the running process of the system without manual participation, and the timeliness of the leakage risk identification of the liquid circulation system is effectively improved.

[0086] Further, based on the above embodiment, another embodiment of the leakage detection method for the liquid circulation system is provided. In the embodiment, the leakage characteristic value includes a pressure drop value, and with reference to Figure 4 , the step S20 includes:

[0087] Step S21, determining a reference value of the pressure drop of the circulating liquid in the target time period according to the pressure state parameter;

[0088] In the embodiment, the pressure state parameter includes a first pressure at a starting time of the target time period and a second pressure at an ending time of the target time period. The first pressure and the second pressure can be detected by the pressure sensor. The difference between the first pressure and the second pressure is determined as the reference value;

[0089] In other implementations, the pressure state parameter can also include a maximum pressure and a minimum pressure detected in the target time period, and the difference between the maximum pressure and the minimum pressure is determined as the reference value here.

[0090] In other implementations, the pressure state parameter can also include a second pressure at an ending moment of the target time period, and the reference value is calculated by looking up a table or substituting into a formula with the second pressure.

[0091] Step S22, determining a target pressure correction value according to the pressure state parameter and the temperature state parameter;

[0092] The target pressure correction value can be a correction amplitude value or a correction ratio.

[0093] Different pressure state parameters and different temperature state parameters correspond to different target pressure correction values. In one implementation, a first pressure correction value can be determined according to the pressure state parameter, a second pressure correction value can be determined according to the temperature state parameter, and the target pressure correction value can be determined according to the first pressure correction value and the second pressure correction value. In another implementation, a corresponding relationship between the pressure state parameter and the target pressure correction value can be obtained according to the temperature state parameter, different temperature state parameters correspond to different corresponding relationships, and the target pressure correction value corresponding to the pressure state parameter can be determined based on the corresponding relationship. In yet another implementation, a corresponding relationship between the temperature state parameter and the target pressure correction value can be obtained according to the pressure state parameter, different pressure state parameters correspond to different corresponding relationships, and the target pressure correction value corresponding to the temperature state parameter can be determined based on the corresponding relationship.

[0094] In the present embodiment, in addition to the first pressure and the second pressure, the pressure state parameter also includes a pressure change value when the operating state of the liquid circulating system changes in the target time period, and the target pressure correction value is determined according to the pressure change value and the temperature state parameter.

[0095] In other implementations, the pressure value can be detected every interval of a set time length in the target time period to obtain a plurality of pressure values, and the pressure state parameter can also include the plurality of pressure values, and the target pressure correction value can be determined according to the plurality of pressure values and the temperature state parameter. Alternatively, the pressure change value can be detected every interval of a set time length in the target time period to obtain a plurality of pressure change values, and the pressure state parameter can also include the plurality of pressure change values, and the target pressure correction value can be determined according to the plurality of pressure change values and the temperature state parameter.

[0096] Step S23, correcting the reference value according to the target pressure correction value to obtain the pressure drop value.

[0097] In one implementation, the calculation result obtained by subtracting the target pressure correction value from the reference value is taken as the pressure drop value. For example, the pressure drop value = P1-P2-ΔP, P1 is the first pressure, P2 is the second pressure, P1-P2 is the reference value, and ΔP is the target pressure correction value.

[0098] In another implementation, the product of the reference value and the target pressure correction value is used as the pressure drop value.

[0099] In the embodiment, the reference value is corrected based on the pressure state parameter and the temperature state parameter to obtain the pressure drop value, so as to avoid the error in liquid leakage identification caused by the temperature change and the pressure change in the target time period, and ensure that the determined pressure drop value can accurately reflect the pressure change caused by the liquid leakage rather than other factors, thereby further improving the accuracy of the liquid leakage detection of the liquid circulating system. In the embodiment, the reference value is corrected based on the pressure change value and the temperature state parameter, so as to further avoid the error in liquid leakage identification caused by the pressure change due to the change in the system operation state, thereby further improving the accuracy of the pressure drop value, and further improving the accuracy of the liquid leakage detection of the liquid circulating system.

[0100] In other embodiments, the reference value can also be determined based on the pressure state parameter, and the reference value is corrected based on the temperature state parameter to obtain the pressure drop value.

[0101] Further, in the embodiment, the liquid circulating system includes an end device, a circulating pump, and a control valve for controlling the fluid flow in the end device. The step of obtaining the pressure change value includes determining a target load as a device that is switched on or off in the circulating pump and the control valve in the target time period, obtaining the change value of the fluid pressure detected by the liquid circulating system before and after the target load is switched on or off, and determining the pressure change value based on the change value of the fluid pressure.

[0102] The switching on or off includes switching from on to off or switching from off to on.

[0103] The pressure change value when switching from on to off can be a pressure increase value, and the pressure change value when switching from off to on can be a pressure drop value.

[0104] The pressure value detected by the pressure sensor at the start time of the switching on or off of the target load is a first fluid pressure, the pressure value detected by the pressure sensor at the end time of the switching on or off of the target load is a second fluid pressure, and the difference between the first fluid pressure and the second fluid pressure is the change value.

[0105] When the number of target loads is one and the number of switching on or off in the target time period is one, the change value of the fluid pressure is determined as the pressure change value.

[0106] When the number of target loads is more than one, and / or when a single target load occurs in a target time period, the change value of the fluid pressure detected before and after each switch action of each target load is determined, the total value of the change of each load liquid is determined according to the sum of all change values corresponding to the target load, and the sum of the total change values of all target loads is taken as the pressure change value here.

[0107] In this embodiment, the process of determining the pressure drop value is modified by using the pressure change value caused by the switching action of the circulating pump and / or the control valve in the liquid circulating system, which is beneficial to avoid the error of the leakage judgment result caused by the system pressure change when the circulating pump and the control valve are switched, so as to effectively improve the accuracy of the leakage judgment based on the pressure drop value.

[0108] Further, in this embodiment, the liquid circulating system includes at least two said terminal devices and at least two said control valves, the terminal devices are arranged one by one with the control valves, and the step of determining the pressure change value according to the change value includes: obtaining a proportional change value of a target proportion before and after the switching action of the target load, the target proportion being the ratio of the number of opened control valves to the number of closed control valves; and correcting the change value of the fluid pressure according to the proportional change value to obtain the pressure change value.

[0109] The first ratio of the number of opened control valves to the number of closed control valves before the switching action of the target load is obtained, the second ratio of the number of opened control valves to the number of closed control valves after the switching action of the target load is obtained, and the difference or ratio of the first ratio and the second ratio is determined as the proportional change value here.

[0110] The third pressure correction value is calculated according to the proportional change value, and the third pressure correction value is positively correlated with the proportional change value. The difference or product of the change value of the fluid pressure and the proportional change value is taken as the pressure change value.

[0111] In this embodiment, since the target proportion in the system is different, the resistance of the fluid flow is different, and the influence on the pressure change is different, therefore, the change value of the fluid pressure is corrected to obtain the pressure change value combined with the proportional change value, which is beneficial to further improve the accuracy of the leakage detection and identification.

[0112] Further, based on any of the above embodiments, another embodiment of the leakage detection method of the liquid circulating system is provided. In this embodiment, the temperature state parameter includes a first temperature at the start time of the target time period and a second temperature at the end time of the target time period, and the step of determining the target pressure correction value according to the pressure change value and the temperature state parameter includes: Figure 5

[0113] ​Step S221, determining a first pressure correction value according to the pressure change value;

[0114] The pressure change value is positively correlated with the first pressure correction value.

[0115] Step S222, determining a second pressure correction value according to the first temperature and the second temperature;

[0116] A corresponding relationship between the first temperature, the second temperature and the second pressure correction value is established in advance, which can include a calculation formula, a mapping table, etc. Based on the corresponding relationship, the second pressure correction value is determined by substituting the first temperature and the second temperature into a preset formula or a lookup table.

[0117] In the embodiment, a volume change value of the circulating liquid of the liquid circulating system in the target time period is determined according to the first temperature and the second temperature; and the second pressure correction value is determined according to the volume change value. The volume change value is positively correlated with the second pressure correction value. A corresponding relationship between the volume change value and the second pressure correction value can be set in advance and can include a calculation formula, a mapping table, etc.

[0118] Specifically, in the embodiment, a first density of the circulating liquid of the liquid circulating system at the starting time is determined according to the first temperature, and a second density of the circulating liquid of the liquid circulating system at the ending time is determined according to the second temperature; a density difference between the first density and the second density is determined; and the volume change value is determined according to the density difference and the mass of the circulating liquid of the liquid circulating system. In the embodiment, the density is negatively correlated with the temperature, and a mapping table representing the relationship between the temperature and the density is set in advance. The matching result obtained by querying the mapping table by the first temperature is taken as the first density, and the matching result obtained by querying the mapping table by the second temperature is taken as the second density. In other embodiments, the first density can be calculated by substituting the first temperature into a preset relationship formula, and the second density can be calculated by substituting the second temperature into the preset relationship formula. The calculation result obtained by subtracting the second density from the first density is taken as the density difference. The ratio of the mass to the density difference is taken as the volume change value. That is, the volume change value ΔV = M / (ρ0-ρ1), where M is the mass, ρ0 is the first density, and ρ1 is the second density.

[0119] In other implementation manners, the second pressure correction value can be determined according to a temperature difference between the first temperature and the second temperature. Alternatively, a third pressure corresponding to the first temperature is determined, a fourth pressure corresponding to the second temperature is determined, and the second pressure correction value is determined according to the third pressure and the fourth pressure.

[0120] Step S223, determining the target pressure correction value according to the first pressure correction value and the second pressure correction value.

[0121] In the embodiment, the first pressure correction value and the second pressure correction value are both pressure correction amplitudes, and a sum of the first pressure correction value and the second pressure correction value is determined as the target pressure correction value. In other embodiments, the first pressure correction value and the second pressure correction value can both be pressure correction coefficients, and a product of the first pressure correction value and the second pressure correction value is determined as the target pressure correction value.

[0122] In the embodiment, the target pressure correction value is determined in the above manner, which is beneficial to ensure that the determined pressure drop value can exclude the influence of pressure change caused by temperature change, thereby further improving the accuracy of the pressure drop value and the liquid leakage risk representation, and further improving the accuracy of the liquid leakage detection.

[0123] In other embodiments, a third pressure corresponding to the first temperature and a fourth pressure corresponding to the second temperature can also be determined, and a pressure difference between the third pressure and the fourth pressure is determined as a reference pressure change value, and a mean value or a maximum value of the reference value and the reference pressure change value is determined as the above pressure drop value.

[0124] Further, in the embodiment, the liquid circulation system further comprises an expansion tank, and before the step of determining the second pressure correction value according to the volume change value, the method further comprises: obtaining a volume of the expansion tank and a gas pre-charging pressure of the expansion tank; establishing a target correspondence relationship between the volume change value and the second pressure correction value according to the volume and the gas pre-charging pressure; and the step of determining the second pressure correction value according to the volume change value comprises: determining the second pressure correction value corresponding to the volume change value based on the target correspondence relationship.

[0125] In the embodiment, the established target correspondence relationship is as follows: △P1=Pg-Pg*Vg / (Vg-△V), wherein Pg is the gas pre-charging pressure, Vg is the volume of the expansion tank, △V is the volume change value, and △P1 is the second pressure correction value. Based on the formula, the second pressure correction value can be calculated by substituting the volume change value into the calculation formula.

[0126] In other embodiments, the target correspondence relationship can also include a mapping table or the like.

[0127] In the embodiment, the correspondence relationship between the volume change value and the second pressure correction value is established in combination with the state parameter of the expansion tank, thereby being beneficial to further improve the accuracy of the pressure drop value determined based on the second pressure correction value, and further improve the accuracy of the liquid leakage detection.

[0128] In addition, an embodiment of the present application also proposes a storage medium, and the storage medium stores a liquid leakage detection program of a liquid circulation system. When the liquid leakage detection program of the liquid circulation system is executed by a processor, the related steps of any one of the above embodiments of the liquid leakage detection method of the liquid circulation system are implemented.

[0129] It should be noted that the terms "comprising", "including", or any other variant thereof, are intended to cover a non-exclusive inclusion, such that processes, methods, articles, or systems that comprise a list of elements do not include only those elements recited, but can also include other elements not expressly listed or inherent to such processes, methods, articles, or systems. Without further limitation, an element preceded by "comprises a" does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or system that comprises the recited element.

[0130] The above-mentioned embodiment numbers of the present application are only for description, and do not represent the advantages and disadvantages of the embodiments.

[0131] From the above description of the embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be realized by means of software and the necessary general hardware platform, of course, they can also be realized by hardware, but in many cases the former is a better embodiment. Based on such understanding, the technical solutions of the present application can be embodied in the form of a software product, which is stored in a storage medium (such as a ROM / RAM, a magnetic disk, or an optical disk) as described above, and includes a number of instructions for making a terminal device (which can be a mobile phone, a computer, a server, a liquid circulation system, or a network device, etc.) execute the methods described in the various embodiments of the present application.

[0132] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, is also included in the patent protection scope of the present application.

Claims

1. A liquid leakage detection method for a liquid circulating system, characterized by, The liquid leakage detection method of the liquid circulation system comprises the following steps: obtaining the pressure state parameters and temperature state parameters of the circulating liquid in the liquid circulation system within a target time period, the pressure state parameters comprising a first pressure at the start time of the target time period, a second pressure at the end time of the target time period, and a pressure change value when the operating state of the liquid circulation system changes within the target time period, and the temperature state parameters comprising a first temperature at the start time of the target time period and a second temperature at the end time of the target time period; determining a liquid leakage characteristic value within the target time period according to the pressure state parameters and temperature state parameters; when the liquid leakage characteristic value meets the preset condition of liquid leakage of the liquid circulation system, determining that the liquid circulation system has a risk of liquid leakage; the liquid leakage characteristic value comprises a pressure drop value, and the step of determining the liquid leakage characteristic value within the target time period according to the pressure state parameters and temperature state parameters comprises: determining the difference between the first pressure and the second pressure as a reference value of the pressure drop of the circulating liquid within the target time period, determining a first pressure correction value according to the pressure change value, and determining a second pressure correction value according to the first temperature and the second temperature; determining a target pressure correction value according to the first pressure correction value and the second pressure correction value; correcting the reference value according to the target pressure correction value to obtain the pressure drop value.

2. The liquid leakage detection method of a liquid circulating system according to claim 1, wherein The liquid leakage characteristic value comprises the pressure drop value of the circulating liquid within the target time period, and the preset condition comprises that the pressure drop value is greater than or equal to a preset value.

3. The liquid leakage detection method of a liquid circulating system according to claim 1, wherein The step of determining the second pressure correction value according to the first temperature and the second temperature comprises: determining a volume change value of the circulating liquid of the liquid circulation system within the target time period according to the first temperature and the second temperature; determining the second pressure correction value according to the volume change value.

4. The liquid leakage detection method of a liquid circulating system according to claim 3, wherein The liquid circulation system further comprises an expansion tank, and before the step of determining the second pressure correction value according to the volume change value, the method further comprises: obtaining the volume of the expansion tank and the gas pre-charging pressure of the expansion tank; establishing a target correspondence relationship between the volume change value and the second pressure correction value according to the volume and the gas pre-charging pressure; the step of determining the second pressure correction value according to the volume change value comprises: determining the second pressure correction value corresponding to the volume change value based on the target correspondence relationship.

5. The liquid leakage detection method of a liquid circulating system according to claim 3, wherein The step of determining the volume change value of the circulating liquid of the liquid circulation system within the target time period according to the first temperature and the second temperature comprises: determining a first density of the circulating liquid of the liquid circulation system at the start time according to the first temperature, and determining a second density of the circulating liquid of the liquid circulation system at the end time according to the second temperature; determining a density difference value of the first density and the second density; determining the volume change value according to the density difference value and the mass of the charging liquid in the liquid circulation system.

6. The liquid leakage detection method of a liquid circulating system according to any one of claims 1 to 5, characterized in that, The liquid circulation system comprises an end device, a circulation pump and a control valve for controlling fluid flow in the end device, and the step of obtaining the pressure change value comprises: determining a target load as a device in which switching action occurs in the circulation pump and the control valve in the target time period, obtaining a change value of fluid pressure detected by the liquid circulation system before and after the target load switching action, and determining the pressure change value according to the change value of fluid pressure.

7. The liquid leakage detection method of a liquid circulating system according to claim 6, wherein The liquid circulation system comprises at least two end devices and at least two control valves, and the end devices and the control valves are arranged in one-to-one correspondence, and the step of determining the pressure change value according to the change value of fluid pressure comprises: obtaining a target proportion of proportional change values before and after the target load switching action, the target proportion being a ratio of the number of open control valves to the number of closed control valves; correcting the change value of fluid pressure according to the proportional change value to obtain the pressure change value.

8. A leakage detection apparatus characterized by comprising: The liquid leakage detection device comprises a memory, a processor and a liquid leakage detection program of a liquid circulation system stored on the memory and executable on the processor, and the liquid leakage detection program of the liquid circulation system is executed by the processor to implement the steps of the liquid leakage detection method of the liquid circulation system according to any one of claims 1 to 7.

9. A storage medium, characterized by The storage medium stores a liquid leakage detection program of a liquid circulation system, and the liquid leakage detection program of the liquid circulation system is executed by the processor to implement the steps of the liquid leakage detection method of the liquid circulation system according to any one of claims 1 to 7.

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