Control method and device for water mixing valve, water mixing device and computer readable storage medium

Abstract

The application relates to the technical field of water mixing devices, and discloses a control method for a water mixing valve, the water mixing valve comprising a low-temperature water inlet, a high-temperature water inlet and a water outlet; the control method comprising: in the case that the water mixing valve is opened, determining a current instruction opening degree of the water mixing valve, and acquiring a first water inlet temperature of the low-temperature water inlet, a second water inlet temperature of the high-temperature water inlet and a current water outlet temperature of the water outlet; according to the first water inlet temperature, the second water inlet temperature and the current instruction opening degree, calculating a theoretical water outlet temperature of the water mixing valve; and according to the current water outlet temperature and the theoretical water outlet temperature, determining a step-out state of the water mixing valve. The application can accurately identify the step-out state of the water mixing valve without relying on a mechanical feedback device, so as to avoid the out-of-control of the water supply temperature of a heat pump system caused by the deviation between a mechanical opening degree and an instruction opening degree, and is beneficial to guaranteeing the environmental comfort of users. The application also discloses a control device for the water mixing valve, a water mixing device and a computer readable storage medium.

Description

Technical Field

[0001] This application relates to the field of mixing device technology, such as a control method, device, and mixing device for a mixing valve, and a computer-readable storage medium. Background Technology

[0002] Currently, heat pump systems typically use medium-temperature chilled water for cooling during operation. To address this, related technologies install a mixing valve at the front end of the manifold. By mixing the low-temperature water from the outdoor heat pump unit with the high-temperature water from the radiant terminals in different proportions, the supply water temperature can be adjusted in real time to obtain medium-temperature water for cooling.

[0003] In the process of implementing the embodiments of this disclosure, at least the following problems were found in the related art:

[0004] After the relevant technology outputs a control signal to the mixing valve, the valve responds and performs a mechanical action, but there is no subsequent feedback on the opening degree. Over long-term operation, the mixing valve is prone to losing synchronization, meaning the opening degree commanded by the control system is inconsistent with the mechanical opening degree of the mixing valve. This can lead to abnormal operation of the heat pump system and affect the comfort of the indoor environment.

[0005] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0006] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0007] This disclosure provides a control method, apparatus, mixing device, and computer-readable storage medium for a mixing valve. It can accurately identify the out-of-step state of the mixing valve without relying on a mechanical feedback device, so as to avoid runaway of the water supply temperature of the heat pump system caused by the deviation between the mechanical opening degree and the command opening degree, which is beneficial to ensuring the comfort of the user environment.

[0008] In some embodiments, the mixing valve includes a low-temperature inlet, a high-temperature inlet, and an outlet; the control method includes: when the mixing valve is open, determining the current commanded opening degree of the mixing valve, and acquiring the first inlet temperature of the low-temperature inlet, the second inlet temperature of the high-temperature inlet, and the current outlet temperature of the outlet; calculating the theoretical outlet temperature of the mixing valve based on the first inlet temperature, the second inlet temperature, and the current commanded opening degree; and determining the out-of-step state of the mixing valve based on the current outlet temperature and the theoretical outlet temperature.

[0009] In some embodiments, the control device includes: a data acquisition module configured to, when the mixing valve is open, determine the current commanded opening degree of the mixing valve and acquire the first inlet water temperature of the low-temperature inlet, the second inlet water temperature of the high-temperature inlet, and the current outlet water temperature of the mixing valve; a calculation module configured to calculate the theoretical outlet water temperature of the mixing valve based on the first inlet water temperature, the second inlet water temperature, and the current commanded opening degree; and a determination module configured to determine the out-of-step state of the mixing valve based on the current outlet water temperature and the theoretical outlet water temperature.

[0010] In some embodiments, the control device includes a processor and a memory storing program instructions, the processor being configured to execute the control method for the mixing valve described above when the program instructions are executed.

[0011] In some embodiments, the mixing device includes: a mixing valve, including a low-temperature inlet, a high-temperature inlet, and an outlet; and the aforementioned control device for the mixing valve is electrically connected to the mixing valve.

[0012] In some embodiments, the computer-readable storage medium stores program instructions that, when executed, cause the computer to perform the above-described control method for the mixing valve.

[0013] The control method, apparatus, mixing device, and computer-readable storage medium for a mixing valve provided in this disclosure can achieve the following technical effects:

[0014] In this embodiment, when the mixing valve is opened, the first inlet water temperature at the low-temperature inlet, the second inlet water temperature at the high-temperature inlet, and the current outlet water temperature are collected in real time, and the current command opening degree received by the mixing valve is determined. Then, this embodiment can dynamically calculate the theoretical outlet water temperature of the mixing valve based on the principle of energy conservation and compare it with the detected current outlet water temperature. This allows for accurate identification of the mixing valve's out-of-synchronization state without relying on mechanical feedback devices, thus avoiding runaway of the heat pump system's water supply temperature caused by the deviation between the mechanical opening degree and the command opening degree, which is beneficial to ensuring the user's environmental comfort.

[0015] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0016] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:

[0017] Figure 1This is a schematic diagram of a control method for a mixing valve provided in an embodiment of this disclosure;

[0018] Figure 2 This is a schematic diagram of another control method for a mixing valve provided in an embodiment of this disclosure;

[0019] Figure 3 This is a schematic diagram of another control method for a mixing valve provided in an embodiment of this disclosure;

[0020] Figure 4 This is a schematic diagram of another control method for a mixing valve provided in an embodiment of this disclosure;

[0021] Figure 5 This is a schematic diagram of a control device for a mixing valve provided in an embodiment of this disclosure;

[0022] Figure 6 This is a schematic diagram of another control device for a mixing valve provided in an embodiment of this disclosure. Detailed Implementation

[0023] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0024] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0025] Unless otherwise stated, the term "multiple" means two or more.

[0026] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0027] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0028] The term "correspondence" can refer to an association or binding relationship. The correspondence between A and B means that there is an association or binding relationship between A and B.

[0029] Combination Figure 1 As shown, this disclosure provides a control method for a mixing valve, including:

[0030] S101, when the mixing valve is open, the control device determines the current command opening degree of the mixing valve and obtains the first inlet water temperature of the low temperature inlet, the second inlet water temperature of the high temperature inlet, and the current outlet water temperature of the mixing valve.

[0031] S102, the control device calculates the theoretical outlet water temperature of the mixing valve based on the first inlet water temperature, the second inlet water temperature and the current command opening degree.

[0032] S103, the control device determines the out-of-step state of the mixing valve based on the current outlet water temperature and the theoretical outlet water temperature.

[0033] The control method for a mixing valve provided in this disclosure acquires the first inlet water temperature at the low-temperature inlet, the second inlet water temperature at the high-temperature inlet, and the current outlet water temperature in real time when the mixing valve is open, and determines the current command opening degree received by the mixing valve. Then, this disclosure embodiment can dynamically calculate the theoretical outlet water temperature of the mixing valve based on the principle of energy conservation and compare it with the detected current outlet water temperature. This allows for accurate identification of the mixing valve's out-of-step state without relying on mechanical feedback devices, thus avoiding runaway heat pump system water supply temperature due to deviations between mechanical and command opening degrees, and helping to ensure user environmental comfort.

[0034] Optionally, the control device calculates the theoretical outlet water temperature of the mixing valve based on the first inlet water temperature, the second inlet water temperature, and the current commanded opening degree, including: the control device calculates T theory =K cmd *T2+(1-K cmd )*T1, to obtain the theoretical outlet water temperature of the mixing valve. Where T... theory T1 is the theoretical outlet water temperature, T2 is the first inlet water temperature, and K is the second inlet water temperature. cmd The current instruction opening degree, 0≤K cmd ≤1. In this way, the embodiments of this disclosure can accurately quantify the physical relationship between the current command opening degree of the mixing valve and the low temperature inlet water temperature / high temperature inlet water temperature, and calculate the theoretical outlet water temperature of the mixing valve based on the energy conservation formula, thereby helping to ensure the accuracy of subsequent out-of-step detection.

[0035] Optionally, the control device determines the out-of-step state of the mixing valve based on the current outlet water temperature and the theoretical outlet water temperature. This includes: the control device calculating the absolute value of the difference between the current outlet water temperature and the theoretical outlet water temperature to obtain an outlet water temperature deviation value; and determining that the mixing valve is in an out-of-step state when the outlet water temperature deviation value is greater than or equal to a preset temperature deviation value and the duration of the deviation is greater than or equal to a preset duration. Thus, this embodiment of the present disclosure can calculate the absolute deviation between the current outlet water temperature and the theoretical outlet water temperature, and combine this deviation duration to determine the out-of-step state of the mixing valve. When the outlet water temperature deviation value is greater than or equal to the preset temperature deviation value and the duration of the deviation is greater than or equal to the preset duration, it indicates that the deviation continuously exceeds the limit, and it can be determined that the mixing valve is in an out-of-step state at this time. This can prevent misjudgment caused by instantaneous interference and improve the accuracy of out-of-step detection.

[0036] Combination Figure 2 As shown, this disclosure provides another control method for a mixing valve, including:

[0037] S201, when the mixing valve is open, the control device determines the current command opening degree of the mixing valve and obtains the first inlet water temperature of the low temperature inlet, the second inlet water temperature of the high temperature inlet, and the current outlet water temperature of the mixing valve.

[0038] S202, the control device calculates the theoretical outlet water temperature of the mixing valve based on the first inlet water temperature, the second inlet water temperature and the current command opening degree.

[0039] S203, the control device calculates the absolute value of the difference between the current outlet water temperature and the theoretical outlet water temperature to obtain the outlet water temperature deviation value.

[0040] S204, if the outlet water temperature deviation is greater than or equal to a preset temperature deviation and the duration is greater than or equal to a preset duration, the control device determines that the mixing valve is out of sync. Alternatively,

[0041] S205, if the outlet water temperature deviation is less than the preset temperature deviation, the control device determines that the mixing valve is in normal condition.

[0042] The control method for a mixing valve provided in this disclosure collects the first inlet water temperature at the low-temperature inlet, the second inlet water temperature at the high-temperature inlet, and the current outlet water temperature in real time when the mixing valve is open, and determines the current opening degree of the mixing valve as instructed. This disclosure then calculates the absolute deviation between the current outlet water temperature and the theoretical outlet water temperature, and uses the duration of the deviation to determine the out-of-step state of the mixing valve. When the outlet water temperature deviation is greater than or equal to a preset temperature deviation value and the duration is greater than or equal to a preset duration, it indicates that the deviation exceeds the limit, and the mixing valve can be determined to be in an out-of-step state. This prevents false judgments caused by momentary interference and improves the accuracy of out-of-step detection. When the outlet water temperature deviation is less than the preset temperature deviation value, it indicates that the deviation has not exceeded the limit, and the current outlet water temperature is close to the theoretical outlet water temperature. In this case, the mixing valve can be determined to be in a normal state, thereby reducing false alarms and helping to maintain the stable operation of the heat pump system. Therefore, the embodiments of this disclosure can accurately identify the out-of-step state of the mixing valve without relying on a mechanical feedback device, so as to avoid the runaway of the water supply temperature of the heat pump system caused by the deviation between the mechanical opening degree and the command opening degree, which is conducive to ensuring the comfort of the user environment.

[0043] Optionally, the preset temperature deviation value can be set in conjunction with the mixing water flow rate. For example, the preset temperature deviation value can be set to 1°C to accurately determine the out-of-step state of the mixing valve. The preset temperature deviation value can also be adjusted according to the user's actual needs, or set to any other reasonable value.

[0044] Optionally, the preset duration can be set in conjunction with the water flow rate. For example, the preset duration can be set to 30 minutes to prevent misjudgment caused by momentary interference. The preset duration can also be adjusted according to the user's actual needs or set to any other reasonable value.

[0045] Combination Figure 3 As shown, this disclosure provides another control method for a mixing valve, including:

[0046] S301, when the mixing valve is open, the control device determines the current command opening degree of the mixing valve and obtains the first inlet water temperature of the low temperature inlet, the second inlet water temperature of the high temperature inlet, and the current outlet water temperature of the mixing valve.

[0047] S302, the control device acquires the fluctuation information of the first inlet water temperature and the fluctuation information of the second inlet water temperature.

[0048] S303, if the fluctuation information of the first inlet water temperature and / or the fluctuation information of the second inlet water temperature meet the preset fluctuation conditions, the control unit stops determining the out-of-step state of the mixing valve. Alternatively,

[0049] S304, if neither the fluctuation information of the first inlet water temperature nor the fluctuation information of the second inlet water temperature meets the preset fluctuation conditions, the control device calculates the theoretical outlet water temperature of the mixing valve based on the first inlet water temperature, the second inlet water temperature and the current command opening degree.

[0050] S305, the control device determines the out-of-step state of the mixing valve based on the current outlet water temperature and the theoretical outlet water temperature.

[0051] The control method for a mixing valve provided in this embodiment collects the first inlet water temperature at the low-temperature inlet, the second inlet water temperature at the high-temperature inlet, and the current outlet water temperature in real time when the mixing valve is open, and determines the current command opening degree received by the mixing valve. Then, this embodiment further detects the fluctuation information of the first and second inlet water temperatures to determine whether the low-temperature and high-temperature inlet water temperatures respectively meet preset fluctuation conditions. If either condition is met, it indicates a drastic fluctuation in the corresponding inlet water temperature. At this time, this embodiment suspends out-of-step detection to prevent external interference from affecting the accuracy of the judgment. Until neither the first nor the second inlet water temperature meets the preset fluctuation conditions, it indicates that the inlet water temperatures on both sides are relatively stable. This embodiment continues to perform out-of-step detection and dynamically calculates the theoretical outlet water temperature of the mixing valve based on the principle of energy conservation. Then, it performs deviation analysis with the detected current outlet water temperature, thereby accurately identifying the out-of-step state of the mixing valve without relying on a mechanical feedback device. This avoids runaway water temperature in the heat pump system caused by the deviation between the mechanical opening degree and the command opening degree, which is beneficial to ensuring user environmental comfort.

[0052] Optionally, the fluctuation information of the first inlet water temperature includes the fluctuation rate and / or fluctuation value of the first inlet water temperature. In this way, the fluctuation of the low-temperature inlet water temperature can be grasped by combining the fluctuation rate and / or fluctuation value of the first inlet water temperature, which helps to improve the accuracy of out-of-step detection.

[0053] Optionally, the control device determines that the fluctuation information of the first inlet water temperature meets the preset fluctuation condition in the following manner: if the fluctuation rate of the first inlet water temperature is greater than the preset temperature fluctuation rate and / or the fluctuation value of the first inlet water temperature is greater than the preset temperature fluctuation value, then the fluctuation information of the first inlet water temperature meets the preset fluctuation condition. Thus, when the fluctuation rate of the first inlet water temperature is greater than the preset temperature fluctuation rate, and / or the fluctuation value of the first inlet water temperature is greater than the preset temperature fluctuation value, it indicates that the low-temperature inlet water temperature is fluctuating drastically. In this case, the out-of-step detection should be suspended to prevent external interference from affecting the accuracy of the judgment.

[0054] Optionally, the fluctuation information of the second inlet water temperature includes the fluctuation rate and / or fluctuation value of the second inlet water temperature. In this way, the fluctuation of the high-temperature inlet water temperature can be grasped by combining the fluctuation rate and / or fluctuation value of the second inlet water temperature, which helps to improve the accuracy of out-of-step detection.

[0055] Optionally, the control device determines that the fluctuation information of the second inlet water temperature meets the preset fluctuation condition in the following manner: if the fluctuation rate of the second inlet water temperature is greater than the preset temperature fluctuation rate and / or the fluctuation value of the second inlet water temperature is greater than the preset temperature fluctuation value, then the fluctuation information of the second inlet water temperature meets the preset fluctuation condition. Thus, when the fluctuation rate of the second inlet water temperature is greater than the preset temperature fluctuation rate, and / or the fluctuation value of the second inlet water temperature is greater than the preset temperature fluctuation value, it indicates that the high-temperature inlet water temperature is fluctuating drastically. In this case, the out-of-step detection should be suspended to prevent external interference from affecting the accuracy of the judgment.

[0056] Optionally, the preset temperature fluctuation rate can be set in conjunction with the mixing water flow rate. For example, the preset temperature fluctuation rate can be set to 0.5℃ / min to prevent external interference from affecting the accuracy of the judgment. The preset temperature fluctuation rate can also be adjusted according to the user's actual needs, or set to any other reasonable value.

[0057] Optionally, the preset temperature fluctuation value can be set in conjunction with the mixing water flow rate. For example, the preset temperature fluctuation value can be set to 1°C to prevent external interference from affecting the accuracy of the judgment. The preset temperature fluctuation value can also be adjusted according to the user's actual needs, or set to any other reasonable value.

[0058] Combination Figure 4 As shown, this disclosure provides another control method for a mixing valve, including:

[0059] S401, when the mixing valve is open, the control device determines the current command opening degree of the mixing valve and obtains the first inlet water temperature of the low temperature inlet, the second inlet water temperature of the high temperature inlet, and the current outlet water temperature of the mixing valve.

[0060] S402, the control device calculates the theoretical outlet water temperature of the mixing valve based on the first inlet water temperature, the second inlet water temperature and the current command opening degree.

[0061] S403, the control device determines the out-of-step state of the mixing valve based on the current outlet water temperature and the theoretical outlet water temperature.

[0062] S404, when the mixing valve is out of step, the control device controls the mixing valve to perform a reset operation.

[0063] The control method for a mixing valve provided in this disclosure acquires the first inlet water temperature at the low-temperature inlet, the second inlet water temperature at the high-temperature inlet, and the current outlet water temperature in real time when the mixing valve is open, and determines the current command opening degree received by the mixing valve. Then, this disclosure embodiment can dynamically calculate the theoretical outlet water temperature of the mixing valve based on the principle of energy conservation and compare it with the detected current outlet water temperature. This allows for accurate identification of the mixing valve's out-of-synchronization state without relying on mechanical feedback devices, preventing runaway heat pump system water supply temperature due to deviations between mechanical and command opening degrees, thus ensuring user comfort. Furthermore, after confirming that the mixing valve has lost synchronization, this disclosure embodiment controls the mixing valve to perform a reset operation, thereby triggering an automatic calibration process to correct the out-of-synchronization state of the mixing valve in a timely manner, which helps ensure the stability of the heat pump system operation.

[0064] Optionally, the control device controls the mixing valve to perform a reset operation, including: the control device gradually adjusts the commanded opening degree of the mixing valve according to a preset step size, and obtains the outlet water temperature corresponding to each commanded opening degree; the control device fits a commanded opening degree-actual outlet water temperature working curve based on the multiple commanded opening degrees of the mixing valve and the outlet water temperature corresponding to each commanded opening degree; the control device determines the mechanical opening degree deviation value based on the commanded opening degree-actual outlet water temperature working curve; and the control device corrects the commanded opening degree of the mixing valve based on the mechanical opening degree deviation value.

[0065] Thus, during the reset operation, this embodiment first adjusts the commanded opening degree of the mixing valve in steps and records the steady-state outlet water temperature corresponding to different commanded opening degrees, thereby generating a "commanded opening degree - actual outlet water temperature" mapping table. Then, this embodiment can combine optimization algorithms such as the least squares method to fit the commanded opening degree - actual outlet water temperature working curve, analyze the mechanical opening degree deviation value from it, and finally automatically correct the commanded opening degree accordingly. This allows for timely correction of the mixing valve's out-of-synchronization state and restoration of the mixing valve's control accuracy. This process requires no additional hardware; precise calibration of the commanded opening degree can be achieved solely through algorithm iteration, significantly reducing system maintenance costs while ensuring long-term stable control accuracy.

[0066] Optionally, the preset step size can be set based on the outlet water temperature deviation value. For example, the preset step size can be set to 5% to gradually adjust the commanded opening of the mixing valve. The preset step size can also be adjusted according to the user's actual needs, or set to any other reasonable value.

[0067] Optionally, the control device determines the mechanical opening deviation value based on the command opening degree - actual outlet water temperature working curve, including: the control device acquiring the command opening degree - target supply water temperature reference curve; the control device determining the mechanical opening deviation value based on the distance between the command opening degree - actual outlet water temperature working curve and the command opening degree - target supply water temperature reference curve. Thus, this embodiment of the present disclosure can query a mapping table between the target supply water temperature and the command opening degree in the memory, thereby generating the command opening degree - target supply water temperature reference curve. Then, this embodiment of the present disclosure performs deviation analysis on the command opening degree - actual outlet water temperature working curve and the command opening degree - target supply water temperature reference curve, extracting the lateral distance between the two to infer the mechanical opening deviation value at this time, which is beneficial for calibrating the command opening degree of the mixing valve and restoring the control accuracy of the mixing valve in a timely manner.

[0068] Optionally, the control device corrects the commanded opening of the mixing valve based on the mechanical opening deviation value, including: the control device calculates K. cmd_new =K cmd +ΔK, obtain the corrected command opening degree of the mixing valve, and store it. Where K... cmd_new K represents the commanded opening degree of the corrected mixing valve. cmd Let ΔK be the commanded opening degree of the mixing valve before correction, and ΔK be the mechanical opening deviation value. Thus, this embodiment of the present disclosure can update the commanded opening degree of the mixing valve using the mechanical opening deviation value. Accurate calibration of the commanded opening degree can be achieved solely through algorithm iteration, significantly reducing system maintenance costs while ensuring long-term stable control accuracy.

[0069] Combination Figure 5 As shown, this embodiment of the present disclosure provides a control device 200 for a mixing valve, including a data acquisition module 101, a calculation module 102, and a determination module 103. The data acquisition module 101 is configured to, when the mixing valve is open, determine the current commanded opening degree of the mixing valve and acquire the first inlet water temperature of the low-temperature inlet, the second inlet water temperature of the high-temperature inlet, and the current outlet water temperature of the mixing valve. The calculation module 102 is configured to calculate the theoretical outlet water temperature of the mixing valve based on the first inlet water temperature, the second inlet water temperature, and the current commanded opening degree. The determination module 103 is configured to determine the out-of-synchronization state of the mixing valve based on the current outlet water temperature and the theoretical outlet water temperature.

[0070] The control device 100 for a mixing valve provided in this embodiment of the invention collects the first inlet water temperature of the low-temperature inlet, the second inlet water temperature of the high-temperature inlet, and the current outlet water temperature in real time when the mixing valve is opened, and determines the current command opening degree received by the mixing valve. Then, this embodiment of the invention can dynamically calculate the theoretical outlet water temperature of the mixing valve based on the principle of energy conservation, and compare and analyze it with the detected current outlet water temperature. This allows for accurate identification of the out-of-synchronization state of the mixing valve without relying on a mechanical feedback device, thus avoiding runaway of the heat pump system water supply temperature caused by the deviation between the mechanical opening degree and the command opening degree, which is beneficial to ensuring the comfort of the user environment.

[0071] Optionally, the control device for the mixing valve also includes a reset module. The reset module is configured to control the mixing valve to perform a reset operation when the mixing valve is in a non-synchronous state. In this way, the reset module can control the mixing valve to perform a reset operation after confirming that the mixing valve has lost synchronization, thereby triggering an automatic calibration process to correct the non-synchronous state of the mixing valve in a timely manner, which helps to ensure the stability of the heat pump system operation.

[0072] Combination Figure 6 As shown, this embodiment of the disclosure provides a control device 200 for a mixing valve, including a processor 201 and a memory 202. Optionally, the control device 200 may further include a communication interface 203 and a bus 204. The processor 201, communication interface 203, and memory 202 can communicate with each other via the bus 204. The communication interface 203 can be used for information transmission. The processor 201 can call logical instructions in the memory 202 to execute the control method for the mixing valve described in the above embodiment.

[0073] Furthermore, the logical instructions in the aforementioned memory 202 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium.

[0074] The memory 202, as a computer-readable storage medium, can be used to store software programs and computer-executable programs, such as program instructions / modules corresponding to the methods in the embodiments of this disclosure. The processor 201 executes functional applications and data processing by running the program instructions / modules stored in the memory 202, thereby implementing the control method for the mixing valve in the above embodiments.

[0075] The memory 202 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created based on the use of the terminal device. Furthermore, the memory 202 may include high-speed random access memory and may also include non-volatile memory.

[0076] This disclosure provides a water mixing device, including a mixing valve and the aforementioned control device 100 / 200 for the mixing valve. The mixing valve includes a low-temperature inlet, a high-temperature inlet, and an outlet. The aforementioned control device 100 / 200 for the mixing valve is electrically connected to the mixing valve. Those skilled in the art will understand that this water mixing device can be adapted to a feasible heat pump system, thereby ensuring the stable operation of the heat pump system.

[0077] This disclosure provides a computer-readable storage medium storing computer-executable instructions configured to perform the above-described control method for a mixing valve.

[0078] The technical solutions of this disclosure can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes one or more instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in this disclosure. The aforementioned storage medium can be a non-transitory storage medium, such as a USB flash drive, external hard drive, read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk, etc., and other media capable of storing program code.

[0079] The foregoing description and accompanying drawings fully illustrate embodiments of this disclosure to enable those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, procedural, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. Moreover, the terminology used in this application is for describing embodiments only and is not intended to limit the claims. As used in the description of embodiments and claims, the singular forms “a,” “an,” and “the” are intended to equally include the plural forms unless the context clearly indicates otherwise. Similarly, the term “and / or” as used in this application means including one or more of the associated listed items and all possible combinations thereof. Additionally, when used in this application, the term "comprise" and its variations "comprises" and / or "comprising" refer to the presence of stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof. Without further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the process, method, or apparatus that includes said element. In this document, each embodiment may focus on the differences from other embodiments, and similar or identical parts between embodiments can be referred to mutually. For methods, products, etc., disclosed in the embodiments, if they correspond to the method section disclosed in the embodiments, the relevant parts can be referred to the description of the method section.

[0080] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the embodiments of this disclosure. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0081] The methods and products (including but not limited to devices and equipment) disclosed in the embodiments herein can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For instance, the division of units may be merely a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the shown or discussed units may be through some interfaces, and the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the units may be selected to implement this embodiment according to actual needs. Furthermore, the functional units in the embodiments of this disclosure may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0082] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to embodiments of this disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. In some alternative implementations, the functions marked in the blocks may occur in a different order than that shown in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different blocks may also occur in a different order than disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. Each block in a block diagram and / or flowchart, and combinations of blocks in a block diagram and / or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

Claims

1. A control method for a mixing valve, characterized in that, The mixing valve includes a low-temperature inlet, a high-temperature inlet, and an outlet; the control method includes: When the mixing valve is open, determine the current commanded opening degree of the mixing valve, and obtain the first inlet water temperature of the low temperature inlet, the second inlet water temperature of the high temperature inlet, and the current outlet water temperature of the mixing valve. Calculate the theoretical outlet water temperature of the mixing valve based on the first inlet water temperature, the second inlet water temperature, and the current command opening degree. Determine the out-of-step state of the mixing valve based on the current outlet water temperature and the theoretical outlet water temperature.

2. The control method according to claim 1, characterized in that, Based on the current outlet water temperature and the theoretical outlet water temperature, determine the out-of-step state of the mixing valve, including: Calculate the absolute value of the difference between the current outlet water temperature and the theoretical outlet water temperature to obtain the outlet water temperature deviation value; If the outlet water temperature deviation is greater than or equal to the preset temperature deviation and the duration is greater than or equal to the preset duration, the mixing valve is determined to be out of sync.

3. The control method according to claim 2, characterized in that, After calculating the absolute value of the difference between the current outlet water temperature and the theoretical outlet water temperature to obtain the outlet water temperature deviation value, the following steps are also included: If the outlet water temperature deviation is less than the preset temperature deviation, the mixing valve is considered to be in normal condition.

4. The control method according to claim 1, characterized in that, Before calculating the theoretical outlet water temperature of the mixing valve based on the first inlet water temperature, the second inlet water temperature, and the current command opening degree, the following steps are also included: Obtain the fluctuation information of the first inlet water temperature and the fluctuation information of the second inlet water temperature; If the fluctuation information of the first inlet water temperature and / or the fluctuation information of the second inlet water temperature meet the preset fluctuation conditions, the determination of the out-of-step state of the mixing valve shall be stopped.

5. The control method according to any one of claims 1 to 4, characterized in that, After determining the out-of-step state of the mixing valve based on the current outlet water temperature and the theoretical outlet water temperature, the following steps are also included: If the mixing valve is out of sync, control the mixing valve to perform a reset operation.

6. The control method according to claim 5, characterized in that, Controlling the mixing valve to perform a reset operation includes: The opening degree of the mixing valve is adjusted step by step according to the preset step size, and the outlet water temperature corresponding to each command opening degree is obtained. Based on the multiple command opening degrees of the mixing valve and the corresponding outlet water temperature for each command opening degree, fit a working curve of command opening degree - actual outlet water temperature. Determine the mechanical opening deviation value based on the working curve of command opening degree - actual outlet water temperature; The commanded opening of the mixing valve is adjusted based on the mechanical opening deviation value.

7. A control device for a mixing valve, characterized in that, include: The data acquisition module is configured to determine the current command opening degree of the mixing valve when the mixing valve is open, and to acquire the first inlet water temperature of the low-temperature inlet, the second inlet water temperature of the high-temperature inlet, and the current outlet water temperature of the mixing valve. The calculation module is configured to calculate the theoretical outlet water temperature of the mixing valve based on the first inlet water temperature, the second inlet water temperature, and the current command opening degree. The determination module is configured to determine the out-of-step state of the mixing valve based on the current outlet water temperature and the theoretical outlet water temperature.

8. A control device for a mixing valve, comprising a processor and a memory storing program instructions, characterized in that, The processor is configured to execute, when running the program instructions, the control method for a mixing valve as described in any one of claims 1 to 6.

9. A water mixing device, characterized in that, include: A mixing valve, comprising a low-temperature inlet, a high-temperature inlet, and an outlet; The control device for the mixing valve as described in claim 7 or 8 is electrically connected to the mixing valve.

10. A computer-readable storage medium storing program instructions, characterized in that, When the program instructions are executed, they cause the computer to perform the control method for the mixing valve as described in any one of claims 1 to 6.

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