A refrigerant leakage detection method, device, heat pump unit and storage medium

Abstract

The embodiment of the application discloses a refrigerant leakage detection method, device, heat pump unit and storage medium. The embodiment of the application discloses a refrigerant leakage detection method applied to a heat pump unit, and has the characteristics that the refrigerant leakage risk of the heat pump unit is determined according to the actual value of the heat change amount and the reference value of the heat change amount, wherein the heat change amount includes the heating capacity or the refrigerating capacity of the heat pump unit; and in the case that the refrigerant leakage risk is within a preset risk range, the refrigerant leakage risk is further updated according to the temperature rise time and the power consumption. The refrigerant leakage detection method provided by the embodiment of the application can improve the accuracy of detection.

Description

TECHNICAL FIELD

[0001] The present specification relates to the field of heat exchange, and in particular, to a refrigerant leakage detection method and device, a heat pump unit, and a storage medium. BACKGROUND

[0002] For a heat pump unit, refrigerant leakage not only causes poor refrigeration or heating effect, but also can cause compressor damage, and even safety accidents. Therefore, it is necessary to detect refrigerant leakage.

[0003] In related technologies, some schemes detect whether refrigerant leaks through a leakage detector, but different ambient temperatures can affect the refrigerant leakage detector, including changes in sensitivity, which can easily reduce the accuracy of refrigerant leakage detection.

[0004] Therefore, it is necessary to provide a refrigerant leakage detection method that can improve detection accuracy. SUMMARY

[0005] The embodiments of the present application provide a refrigerant leakage detection method, device, heat pump unit, and storage medium, which can improve detection accuracy.

[0006] In a first aspect, the embodiments of the present application provide a refrigerant leakage detection method applied to a heat pump unit, characterized in that: determining a refrigerant leakage risk of the heat pump unit according to an actual value of a heat change amount and a reference value of the heat change amount, wherein the heat change amount includes heating capacity or refrigeration capacity of the heat pump unit; and in a case where the refrigerant leakage risk is within a preset risk range, updating the refrigerant leakage risk according to a temperature rise time and power consumption.

[0007] In some implementations, the determining of the refrigerant leakage risk of the heat pump unit according to the actual value of the heat change amount and the reference value of the heat change amount includes: determining a difference degree of the actual value of the heat change amount and the reference value of the heat change amount; and determining the refrigerant leakage risk according to the difference degree.

[0008] In some implementations, the determining of the refrigerant leakage risk according to the difference degree includes: in a case where the difference degree is greater than a first threshold, determining that the refrigerant leakage risk is a high risk; or in a case where the difference degree is less than or equal to a second threshold, determining that the refrigerant leakage risk is a low risk; or in a case where the difference degree is less than or equal to the first threshold and greater than the second threshold, determining that the refrigerant leakage risk is a medium risk, wherein the first threshold is greater than the second threshold, and the preset risk range includes the medium risk.

[0009] In some embodiments, the determining the refrigerant leakage risk according to the temperature rise time and the power consumption includes: updating the refrigerant leakage risk according to a difference degree of an actual value of the temperature rise time and a reference value of the temperature rise time, and a difference degree of an actual value of the power consumption and a reference value of the power consumption, wherein the difference degree and the refrigerant leakage risk are positively correlated.

[0010] In some embodiments, the difference degree of the actual value of the temperature rise time and the reference value of the temperature rise time includes a ratio of the actual value of the temperature rise time and the reference value of the temperature rise time.

[0011] In some embodiments, the difference degree of the actual value of the power consumption and the reference value of the power consumption includes a ratio of the actual value of the power consumption and the reference value of the power consumption.

[0012] In some embodiments, the updating the refrigerant leakage risk according to the difference degree of the actual value of the temperature rise time and the reference value of the temperature rise time, and the difference degree of the actual value of the power consumption and the reference value of the power consumption includes: determining that the refrigerant leakage risk is high risk when the difference degree of the actual value of the temperature rise time and the reference value of the temperature rise time is greater than a temperature rise time threshold, and the difference degree of the actual value of the power consumption and the reference value of the power consumption is greater than a power consumption threshold.

[0013] In some embodiments, the method further includes: obtaining the reference value of the heat change amount, the reference value of the temperature rise time and the reference value of the power consumption corresponding to the pre-operation parameter according to a pre-established reference table.

[0014] In some embodiments, the pre-operation parameter includes at least one of an ambient temperature, a compressor frequency, a running time, a target temperature, a fan speed and an expansion valve opening degree.

[0015] In a second aspect, an embodiment of the present application provides a control device, characterized in that the device includes:

[0016] a determining module configured to determine a refrigerant leakage risk of the heat pump unit according to an actual value of a heat change amount and a reference value of the heat change amount, wherein the heat change amount includes a heating capacity or a refrigerating capacity of the heat pump unit; and

[0017] an updating module configured to update the refrigerant leakage risk according to a temperature rise time and a power consumption when the refrigerant leakage risk is within a preset risk range.

[0018] In a third aspect, an embodiment of the present application provides a heat pump unit, characterized in that the heat pump unit comprises a memory, a processor, and a computer program stored in the memory and capable of running on the processor, and the processor implements the operations in the method according to the first aspect when executing the computer program.

[0019] In a fourth aspect, an embodiment of the present application provides a computer readable storage medium, characterized in that the computer readable storage medium stores a computer program, and the computer program is executed by a processor to implement the operations in the method according to the first aspect.

[0020] To sum up, the embodiments of the present application disclose a refrigerant leakage detection method, device, heat pump unit and storage medium. The embodiments of the present application disclose a refrigerant leakage detection method applied to a heat pump unit, characterized in that the method comprises: determining a refrigerant leakage risk of the heat pump unit according to an actual value of a heat change amount and a reference value of the heat change amount, wherein the heat change amount comprises a heating capacity or a refrigerating capacity of the heat pump unit; and in the case that the refrigerant leakage risk is within a preset risk range, updating the refrigerant leakage risk according to a temperature rise time and an electricity consumption. The refrigerant leakage detection method provided by the embodiments of the present application can improve the accuracy of detection. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0022] Figure 1 A flowchart of a refrigerant leakage detection method provided by some embodiments of the present application is shown;

[0023] Figure 2 A flowchart of determining a refrigerant leakage risk provided by some embodiments of the present application is shown;

[0024] Figure 3 A flowchart of updating a refrigerant leakage risk according to a temperature rise time and an electricity consumption provided by some embodiments of the present application is shown;

[0025] Figure 4 An example diagram of a refrigerant leakage detection method provided by some embodiments of the present application is shown;

[0026] Figure 5 A structural diagram of a control device provided by some embodiments of the present application is shown; and

[0027] Figure 6A structural schematic diagram of a heat pump unit provided by some embodiments of the present application is shown. DETAILED DESCRIPTION

[0028] The technical solutions in the present application will be described clearly and completely below in combination with the drawings in the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0029] Although the present application shows the logical sequence in the flowchart, in some cases, the operations shown or described can be performed in a sequence different from that shown in the drawings.

[0030] The water-side heat exchanger is an important component in the heat pump unit, which functions to transfer the heat generated by the heat pump or the cold absorbed by the heat pump to the water circulation system. The water circulation system exchanges heat with the water-side heat exchanger, and then effectively delivers the heat or cold to other places. Under the same working condition, if refrigerant leakage occurs, the heat or cold that can be provided by the water-side heat exchanger will be reduced. Therefore, by detecting the changes in the indicators of the water circulation system, it can be efficiently determined whether refrigerant leakage has occurred. Of course, in the heat exchange equipment using other heat supply media, the gas circulation system can also be used for heat exchange, at this time, the changes in the indicators of the gas circulation system can be detected to determine whether refrigerant leakage has occurred.

[0031] Figure 1 A flowchart of a refrigerant leakage detection method provided by some embodiments of the present application is shown. Specifically, the specific flow of the refrigerant leakage detection method can be as follows:

[0032] S101, determining the refrigerant leakage risk of the heat pump unit according to the actual value of the heat change amount and the reference value of the heat change amount.

[0033] The heat change amount can include the heating capacity or the refrigerating capacity of the heat pump unit. The actual value of the heat change amount can be the heat change amount obtained according to the measurement results of the actual operation of the heat pump unit. The reference value of the heat change amount can be the heat change amount of the heat pump unit without refrigerant leakage when operating under the same working condition. The same working condition can include the same operating parameters and the same operating environment. The reference value of the heat change amount can be obtained according to theoretical calculation, or can be obtained according to test. Different operating conditions can correspond to different reference values of the heat change amount, which can be pre-configured in the heat pump unit according to the actual situation.

[0034] The refrigerant leakage risk is related to a probability of refrigerant leakage. A high refrigerant leakage risk means a high probability of refrigerant leakage. Specifically, the refrigerant leakage risk can be represented in various forms. For example, the refrigerant leakage risk can be represented by a probability value of refrigerant leakage. For another example, the refrigerant leakage risk can be represented by different levels in a grading system. For yet another example, the refrigerant leakage risk can be represented by a score obtained by combining different scores with the probability.

[0035] Under the same working condition, if the actual value of the heat change amount is lower than the reference value of the heat change amount, the heat pump unit can have a refrigerant leakage problem.

[0036] S103, in the case where the refrigerant leakage risk is within a preset risk range, the refrigerant leakage risk is further updated according to the temperature reaching time and the power consumption.

[0037] The preset risk range can be used to determine whether the refrigerant leakage risk needs to be further determined. The preset risk range can correspond to the form of the refrigerant leakage risk. For example, the preset risk range can be a probability interval. For another example, the preset risk range can be a set containing at least one level. For yet another example, the preset risk range can be a score interval.

[0038] As described above, under the same working condition, if the actual value of the heat change amount is lower than the reference value of the heat change amount, the heat pump unit can have a refrigerant leakage problem. If the difference between the actual value and the reference value of the heat change amount is very large or very small, the refrigerant leakage risk is more accurate. That is, when the refrigerant leakage risk is determined to be high or low according to the actual value and the reference value of the heat change amount, a conclusion can be drawn as to whether the refrigerant leaks, and the conclusion is relatively reliable. However, if the refrigerant leakage risk is determined to be in an intermediate range, the reliability of the conclusion is lower. Therefore, the refrigerant leakage risk can be further determined in combination with other indicators, such as the temperature reaching time and the power consumption.

[0039] The temperature reaching time can be a time required for the water outlet temperature of the water circulation system to reach a preset target temperature, or the temperature reaching time can be a time required for the gas outlet temperature of the gas circulation system to reach a preset target temperature. The preset target temperature can be set according to different working conditions.

[0040] The power consumption can include a motor power consumption or a controller power consumption of the heat pump unit.

[0041] Under the refrigerant leakage condition, the heating capacity or the refrigerating capacity decays, the temperature reaching time is prolonged, and the power consumption is increased. Therefore, the temperature reaching time and the power consumption can be used to determine whether there is a refrigerant leakage risk.

[0042] The refrigerant leakage detection method provided by the embodiments of the present application can determine the refrigerant leakage risk of the heat pump unit according to the actual value of the heat change amount and the reference value of the heat change amount. In the case where the refrigerant leakage risk is within the preset risk range, the refrigerant leakage risk is further updated according to the temperature rise time and the power consumption. The refrigerant leakage detection method provided by the embodiments of the present application can improve the accuracy of detection.

[0043] In the determination of the refrigerant leakage risk, the actual value and the reference value need to be compared. In some embodiments, the reference value can be stored in a pre-established reference table. Specifically, the refrigerant leakage risk detection method can further include:

[0044] According to the pre-established reference table, the reference value of the heat change amount, the reference value of the temperature rise time and the reference value of the power consumption corresponding to the pre-operation parameters are obtained.

[0045] The pre-operation can be a short-time operation of the heat pump unit according to a preset set of parameters, for refrigerant leakage detection. The pre-operation parameters can include at least one of the ambient temperature, the compressor frequency, the operation time, the target temperature, the fan speed and the expansion valve opening degree.

[0046] The reference table can include the reference values corresponding to at least one set of pre-operation parameters. For example, the reference table can record the reference values of the heat change amount, the reference values of the temperature rise time and the reference values of the power consumption under different ambient temperatures and different target temperatures, wherein the compressor frequency, the operation time, the fan speed and the expansion valve opening degree can be fixed values. Of course, the reference table can record other parameter combinations and corresponding relationships. In the refrigerant leakage detection, the heat pump unit can use any one of the parameter sets as the pre-operation parameters. When the pre-operation ends, the actual values of the heat change amount, the actual values of the temperature rise time and the actual values of the power consumption can be determined, and the refrigerant leakage can be determined according to the comparison of the actual values and the corresponding reference values.

[0047] Figure 2 The flowchart for determining the refrigerant leakage risk provided by some embodiments of the present application is shown. Specifically, the specific process for determining the refrigerant leakage risk can be as follows:

[0048] S201, determining the difference degree of the actual value of the heat change amount and the reference value of the heat change amount.

[0049] In some embodiments, the difference degree can be determined according to the ratio of the reference value of the heat change amount and the actual value. The larger the ratio, the greater the difference degree; on the contrary, the smaller the ratio, the smaller the difference degree.

[0050] In some embodiments, the difference degree can be determined according to a difference between the reference value and the actual value of the heat change amount. The greater the difference, the greater the difference degree; conversely, the smaller the difference, the smaller the difference degree.

[0051] S203, determining the refrigerant leakage risk according to the difference degree.

[0052] The greater the difference degree between the actual value of the heat change amount and the reference value of the heat change amount, the higher the risk of refrigerant leakage can be reflected.

[0053] In some embodiments, operation S203 can include:

[0054] In the case where the difference degree is greater than the first threshold value, it is determined that the refrigerant leakage risk is high.

[0055] In the case where the difference degree is less than or equal to the second threshold value, it is determined that the refrigerant leakage risk is low.

[0056] In the case where the difference degree is less than or equal to the first threshold value and greater than the second threshold value, it is determined that the refrigerant leakage risk is medium.

[0057] The first threshold value is greater than the second threshold value.

[0058] The preset risk range includes the medium risk. That is, when the refrigerant leakage risk level is medium, the accuracy of judging whether the refrigerant leaks or not will be relatively low. At this time, the temperature rise time and the power consumption need to be combined for further judgment. As described above, the representation form of the refrigerant leakage risk can be other forms.

[0059] In some embodiments, operation S203 can include:

[0060] In the case where the difference degree is greater than the first threshold value, it is determined that the refrigerant leakage risk is high.

[0061] In the case where the difference degree is less than or equal to the second threshold value, it is determined that the refrigerant leakage risk is low.

[0062] In the case where the difference degree is less than or equal to the first threshold value and greater than the second threshold value, the refrigerant leakage risk is determined in combination with the temperature rise time and the power consumption.

[0063] The refrigerant leakage detection method provided by some embodiments of the present application can preliminarily judge the refrigerant leakage risk according to the difference degree between the actual value of the heat change amount and the reference value of the heat change amount. If the preliminary judgment result is within the preset risk range, the temperature rise time and the power consumption are combined for further judgment to improve the accuracy of the judgment.

[0064] How to determine the refrigerant leakage risk according to the temperature rise time and the power consumption will be introduced below.

[0065] In some embodiments, the refrigerant leakage risk can be updated according to a difference degree of the actual value of the warm-up time and the reference value of the warm-up time, and a difference degree of the actual value of the power consumption and the reference value of the power consumption.

[0066] The difference degree and the refrigerant leakage risk are positively correlated. The greater the difference degree is, the higher the refrigerant leakage risk is; on the contrary, the smaller the difference degree is, the lower the refrigerant leakage risk is.

[0067] In some embodiments, the difference degree of the actual value of the warm-up time and the reference value of the warm-up time can be a ratio of the actual value of the warm-up time and the reference value of the warm-up time. The greater the ratio is, the greater the difference degree is; on the contrary, the smaller the ratio is, the smaller the difference degree is.

[0068] In some embodiments, the difference degree of the actual value of the warm-up time and the reference value of the warm-up time can be a difference value of the actual value of the warm-up time and the reference value of the warm-up time. The greater the difference value is, the greater the difference degree is; on the contrary, the smaller the difference value is, the smaller the difference degree is.

[0069] In some embodiments, the difference degree of the actual value of the power consumption and the reference value of the power consumption can be a ratio of the reference value of the power consumption and the actual value of the power consumption. The greater the ratio is, the greater the difference degree is; on the contrary, the smaller the ratio is, the smaller the difference degree is.

[0070] In some embodiments, the difference degree of the actual value of the power consumption and the reference value of the power consumption can be a difference value of the actual value of the power consumption and the reference value of the power consumption. The greater the difference value is, the greater the difference degree is; on the contrary, the smaller the difference value is, the smaller the difference degree is.

[0071] Figure 3 A flowchart of updating the refrigerant leakage risk according to the warm-up time and the power consumption is shown. Specifically, the specific flow of updating the refrigerant leakage risk according to the warm-up time and the power consumption can be as follows:

[0072] S301, determining the refrigerant leakage risk of the heat pump unit according to the actual value of the heat change amount and the reference value of the heat change amount.

[0073] S302, judging whether the refrigerant leakage risk is within a preset risk range.

[0074] S303, judging whether the difference degree of the actual value of the warm-up time and the reference value of the warm-up time is greater than a warm-up time threshold value, and the difference degree of the actual value of the power consumption and the reference value of the power consumption is greater than a power consumption threshold value.

[0075] The threshold of the temperature rising time and the threshold of the power consumption can be preset values in the heat pump unit system.

[0076] In operation S303, if the result of the judgment is yes, it is determined that the refrigerant leakage risk is high.

[0077] In operation S303, if the result of the judgment is no, it is determined that the refrigerant leakage risk is low.

[0078] Some embodiments of the present application can determine the refrigerant leakage risk according to the difference between the actual value and the reference value of the temperature rising time and the difference between the actual value and the reference value of the power consumption, thereby improving the accuracy of the judgment of whether the refrigerant leakage occurs.

[0079] Figure 4 An example diagram of the refrigerant leakage detection method provided by some embodiments of the present application is shown. In this embodiment, the refrigerating capacity is taken as an example for description. Specifically, the specific process of the refrigerant leakage detection method can be as follows:

[0080] The heat pump unit runs for a preset time T according to the pre-operation parameters. The pre-operation parameters can also include the ambient temperature, the compressor frequency, the expansion valve opening degree, the target temperature, and the fan speed.

[0081] Next, the actual value Q1 of the refrigerating capacity and the reference value Q0 of the refrigerating capacity are determined. The actual value Q1 of the refrigerating capacity can be determined according to the following formula:

[0082] Q1 = ∫0 T c x p x L x t 进出水 dt

[0083] Wherein, c represents the specific heat capacity of water, p represents the density of water, L represents the flow rate in the water circulation system per unit time (second), t 进出水 represents the temperature difference of the water in and out of the water circulation system, and T represents the preset running time.

[0084] The reference value Q0 of the refrigerating capacity can be found from a pre-established reference table. The determination method of Q0 can also be according to the above formula, which will not be described here.

[0085] It is determined whether Q0 / Q1 is greater than a first threshold A. If yes, it is determined that the refrigerant leakage occurs. If no, it is determined whether Q0 / Q1 is less than or equal to a second threshold B. If yes, it is determined that the refrigerant leakage does not occur. If no, further judgment is made according to the temperature rising time and the power consumption.

[0086] The heat pump continues to run to reach the target temperature, and the actual value T1 of the temperature rising time and the reference value T0 of the temperature rising time are determined. The actual value W1 of the power consumption and the reference value W0 of the power consumption are determined. The actual value W1 of the power consumption can be determined according to the following formula:

[0087] W1=∫0 T1 (P 电机 +P 电控 )dt

[0088] Among them, P 电机 This represents the total power of the motors in the heat pump unit, and this represents the power of the electrical control module in the heat pump unit.

[0089] The reference value W0 for power consumption can be found in a pre-established lookup table. The method for determining W0 can also follow the formula described above, and will not be repeated here.

[0090] Determine if the following conditions are met: T1 / T0 is greater than the temperature reach threshold C, and W1 / W0 is greater than the power consumption threshold D. If these conditions are met, a refrigerant leak is confirmed. If not, no refrigerant leak is confirmed.

[0091] Once a refrigerant leak is detected in the heat pump unit, in order to prevent the unit from operating inefficiently, the unit can send a refrigerant shortage signal to terminate the unit's operation, or issue a refrigerant shortage alarm.

[0092] Figure 5 The diagram shows a schematic representation of a control device provided in some embodiments of this application. Specifically, the control device 500 can be as follows:

[0093] Module 501 is used to determine the refrigerant leakage risk of the heat pump unit based on the actual value and reference value of the heat change, wherein the heat change includes the heating or cooling capacity of the heat pump unit; and

[0094] The update module 503 is used to update the refrigerant leakage risk based on the time to reach the desired temperature and power consumption, provided that the refrigerant leakage risk is within the preset risk range.

[0095] In this embodiment, the determining module 501 determines the refrigerant leakage risk of the heat pump unit based on the actual value and reference value of the heat change. Then, the updating module 503 updates the refrigerant leakage risk based on the temperature reaching time and power consumption, provided that the refrigerant leakage risk is within the preset risk range.

[0096] In some embodiments, the determining module 501 may include a first determining unit and a second determining unit. The first determining unit may be used to determine the degree of difference between the actual value of the heat change and a reference value of the heat change. The second determining unit may be used to determine the risk of refrigerant leakage based on the degree of difference.

[0097] In some embodiments, the second determining unit can include a first determining subunit, a second determining subunit, and a third determining subunit. The first determining subunit can be configured to determine that the refrigerant leakage risk is high risk when the difference degree is greater than the first threshold. The second determining subunit can be configured to determine that the refrigerant leakage risk is low risk when the difference degree is less than or equal to the second threshold. The third determining subunit can be configured to determine that the refrigerant leakage risk is medium risk when the difference degree is less than or equal to the first threshold and greater than the second threshold. The first threshold is greater than the second threshold, and the preset risk range includes the medium risk.

[0098] In some embodiments, the updating module 503 can include a first updating unit. The first updating unit can be configured to update the refrigerant leakage risk according to a difference degree between the actual value of the temperature rise time and the reference value of the temperature rise time, and a difference degree between the actual value of the power consumption and the reference value of the power consumption. The difference degree is positively correlated with the refrigerant leakage risk.

[0099] In some embodiments, the first updating unit can include a fourth determining subunit. The fourth determining subunit can be configured to determine that the refrigerant leakage risk is high risk when the difference degree between the actual value of the temperature rise time and the reference value of the temperature rise time is greater than a temperature rise time threshold, and the difference degree between the actual value of the power consumption and the reference value of the power consumption is greater than a power consumption threshold.

[0100] In some embodiments, the control device 500 can further include an obtaining module. The obtaining module can be configured to obtain the reference value of the heat change amount, the reference value of the temperature rise time, and the reference value of the power consumption corresponding to the pre-operation parameter according to a pre-established reference table.

[0101] In addition, the present application also provides a heat pump unit. The heat pump unit can be an air source heat pump or a ground source heat pump. The heat pump unit can circulate heat through a water circulation system or a gas circulation system. The heat pump unit can be a single-function heat pump, a two-coupled heat pump, or a three-coupled heat pump.

[0102] The heat pump unit provided by some embodiments of the present application can be applied to devices that need to exchange heat. For example, air conditioners, water heaters, etc. The heat pump unit provided by some embodiments of the present application has a wide range of application scenarios. For example, the heat pump unit can be used in heating and cooling systems of homes and commercial buildings, can be used as part of a central air conditioning system, or can be installed in the form of a small unit. For example, the heat pump unit can be used for temperature control of a constant-temperature swimming pool to maintain the appropriate temperature of the swimming pool. For another example, the heat pump unit can be used for temperature regulation of a greenhouse in agricultural production to provide suitable temperature and humidity for plant growth.

[0103] It should be understood that the application scenarios listed in the specification are only part of the application scenarios of the heat pump unit provided by the present application. Those skilled in the art should understand that the heat pump unit provided by the present application is also applied to other use scenarios within the protection scope of the present application.

[0104] Figure 6 The structural schematic diagram of the heat pump unit provided by some embodiments of the present application is shown, in particular:

[0105] The heat pump unit 600 can include a processor 601 with one or more processing cores, a memory 602 with one or more computer readable storage media, and the like. Those skilled in the art can understand that the heat pump unit 600 can include more or fewer components than those shown in the figure, or combine some components, or different component arrangements. Among them: Figure 6 The structure of the heat pump unit 600 shown in the figure does not constitute a limitation on the heat pump unit, and can include more or fewer components than those shown in the figure, or combine some components, or different component arrangements. Among them:

[0106] The processor 601 is the control center of the heat pump unit 600, which connects various parts of the heat pump unit 600 through various interfaces and lines, and performs various functions of the heat pump unit 600 and processes data by running or executing software programs and / or modules stored in the memory 602 and calling data stored in the memory 602, thereby overall monitoring the heat pump unit 600. Optionally, the processor 601 can include one or more processing cores; preferably, the processor 601 can integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface and application program, etc., and the modem processor mainly processes wireless communication. It can be understood that the above-mentioned modem processor can also not be integrated into the processor 601.

[0107] The memory 602 can be used to store software programs and modules, and the processor 601 executes various functions and data processing by running the software programs and modules stored in the memory 602. The memory 602 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, at least one application program required by a function, etc.; the data storage area can store data created according to the use of the heat pump unit 600, etc. In addition, the memory 602 can include a high-speed random access memory, and can also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other volatile solid-state memory device. Accordingly, the memory 602 can also include a memory controller to provide access for the processor 601 to the memory 602.

[0108] Specifically in this embodiment, the processor 601 in the heat pump unit 600 will load the executable file corresponding to the process of one or more application programs into the memory 602 according to the following instructions, and run the application program stored in the memory 602 by the processor 601, so as to realize the operation in any refrigerant leakage detection method provided by the embodiment of the application.

[0109] The specific process in which the heat pump unit 600 executes the refrigerant leakage detection method can be referred to the description in the foregoing embodiment, which will not be repeated here. Figures 1 to 4

[0110] Those skilled in the art can understand that all or part of the operations in the various methods of the above embodiments can be completed by instructions, or by related hardware controlled by the instructions, which can be stored in a computer readable storage medium and loaded and executed by a processor.

[0111] To this end, the application provides a computer readable storage medium, which stores a computer program capable of being loaded by a processor to execute the operation in any refrigerant leakage detection method provided by the application.

[0112] The specific implementation of each operation can refer to the foregoing embodiments, which will not be repeated here.

[0113] The computer readable storage medium can include a read only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0114] Since the instructions stored in the computer readable storage medium can execute the operation in any refrigerant leakage detection method provided by the application, the beneficial effects of any refrigerant leakage detection method provided by the application can be achieved, which will not be repeated here for details, as described in the foregoing embodiments.

[0115] The above provides a detailed description of the refrigerant leakage detection method, device, heat pump unit and storage medium provided by the application. The principle and implementation mode of the application are described by applying specific examples in this paper. The above embodiment is only used to help understand the method and core idea of the application. Meanwhile, for those skilled in the art, according to the idea of the application, the specific implementation mode and application range will be changed. In conclusion, the content of the specification should not be understood as a limitation of the application.​

Claims

1. A refrigerant leakage detection method applied to a heat pump unit, characterized in that, include: The risk of refrigerant leakage of the heat pump unit is determined based on the actual value and the reference value of the heat change, wherein the heat change includes the heating or cooling capacity of the heat pump unit. Determine the degree of difference between the actual value of the heat change and the reference value of the heat change; and The risk of refrigerant leakage is determined based on the degree of difference. If the degree of difference is less than or equal to a first threshold and greater than a second threshold, the refrigerant leakage risk is determined to be medium risk, wherein the first threshold is greater than the second threshold, and the preset risk range includes the medium risk. If the refrigerant leakage risk is within a preset risk range, the refrigerant leakage risk is updated based on the degree of difference between the actual value of the time to reach the temperature and the reference value of the time to reach the temperature, and the degree of difference between the actual value of the power consumption and the reference value of the power consumption; the degree of difference is positively correlated with the refrigerant leakage risk. If the difference between the actual value of the time to reach the temperature and the reference value of the time to reach the temperature is greater than the time to reach the temperature threshold, and the difference between the actual value of the power consumption and the reference value of the power consumption is greater than the power consumption threshold, the risk of refrigerant leakage is determined to be high risk.

2. The method of claim 1, wherein, in, The determination of the refrigerant leakage risk based on the degree of difference includes: If the degree of difference is greater than a first threshold, the refrigerant leakage risk is determined to be high risk; or If the degree of difference is less than or equal to the second threshold, the risk of refrigerant leakage is determined to be low.

3. The method of claim 1, wherein, in, The degree of difference between the actual value of the time to reach the temperature and the reference value of the time to reach the temperature includes: The ratio of the actual value of the time to reach the temperature to the reference value of the time to reach the temperature.

4. The method of claim 1, wherein, in, The degree of difference between the actual power consumption and the reference power consumption includes: The ratio of the actual power consumption to the reference power consumption.

5. The method of claim 1, wherein, The method further includes: Based on a pre-established reference table, obtain reference values ​​for the heat change, the time to reach the desired temperature, and the power consumption corresponding to the pre-operation parameters.

6. The method of claim 5, wherein, in, The pre-operation parameters include at least one of the following: ambient temperature, compressor frequency, operating time, target temperature, fan speed, and expansion valve opening.

7. A control device characterized by comprising: The device, applied to heat pump units, includes: The determination module is used to determine the refrigerant leakage risk of the heat pump unit based on the actual value and the reference value of the heat change, wherein the heat change includes the heating or cooling capacity of the heat pump unit. The determining module includes a first determining unit and a second determining unit; The first determining unit is used to determine the degree of difference between the actual value of the heat change and the reference value of the heat change; and The second determining unit is used to determine the refrigerant leakage risk based on the degree of difference; The second determining unit includes a third determining subunit, which is used to determine the refrigerant leakage risk as medium risk when the degree of difference is less than or equal to a first threshold and greater than a second threshold, wherein the first threshold is greater than the second threshold and the preset risk range includes the medium risk. The update module is used to update the refrigerant leakage risk based on the time to reach the desired temperature and power consumption, provided that the refrigerant leakage risk is within a preset risk range; the degree of difference is positively correlated with the refrigerant leakage risk. The update module includes a first update unit; The first updating unit is used to update the refrigerant leakage risk based on the degree of difference between the actual value of the time to reach the temperature and the reference value of the time to reach the temperature, and the degree of difference between the actual value of the power consumption and the reference value of the power consumption. The first update unit includes a fourth determination subunit; The fourth determining subunit is used to determine that the refrigerant leakage risk is high risk when the difference between the actual value of the temperature reaching time and the reference value of the temperature reaching time is greater than a temperature reaching time threshold, and the difference between the actual value of the power consumption and the reference value of the power consumption is greater than a power consumption threshold.

8. A heat pump unit, characterized by It includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, performs the operations described in any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the operations described in any one of claims 1-6.

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