Control method and device of heat pump unit, storage medium and electronic equipment

Abstract

The application discloses a heat pump unit control method and device, a storage medium and an electronic device. The method detects the current water circulation flow and the current water inlet temperature of the heat pump unit in response to the defrosting trigger instruction for the heat pump unit, performs defrosting execution matching processing based on the current water circulation flow and the current water inlet temperature, and controls the heat pump unit to perform defrosting processing. Through the pre-detection of the water circulation flow and the water inlet temperature and the accurate matching of the defrosting execution, the freezing problem of the plate heat exchanger caused by insufficient flow and too low water inlet temperature is avoided from the source, so that the freezing risk of the plate heat exchanger can be effectively avoided in the defrosting control process of the heat pump unit.

Description

Technical Field

[0001] This application relates to the field of HVAC technology, specifically to a control method, device, storage medium, and electronic equipment for a heat pump unit. Background Technology

[0002] As a highly efficient energy conversion device, heat pump units are widely used in heating, cooling, and hot water supply due to their energy-saving and environmentally friendly characteristics. They utilize energy by absorbing heat from a lower-grade heat source and transferring it to a higher-grade heat source. The outdoor heat exchanger is the core component for this heat exchange. In low-temperature and high-humidity operating environments, the surface of the outdoor heat exchanger of a heat pump unit is prone to frost formation. The frost layer significantly reduces the heat exchanger's efficiency, leading to a decrease in the heat pump unit's heating capacity and an increase in energy consumption. Therefore, timely defrosting of the outdoor heat exchanger is necessary to ensure the stable operation of the heat pump unit.

[0003] In related technologies, heat pump units still face the risk of plate heat exchanger freezing during defrosting, making it difficult to ensure the operational safety of the equipment during the defrosting process. Therefore, how to effectively avoid the freezing risk of plate heat exchangers during the defrosting control of heat pump units has become an urgent technical problem to be solved in the field of defrosting control for heat pump units. Summary of the Invention

[0004] This application provides a control method, device, storage medium, and electronic equipment for a heat pump unit, which can effectively avoid the freezing risk of plate heat exchangers during the defrosting control process of the heat pump unit.

[0005] In a first aspect, embodiments of this application provide a control method for a heat pump unit, applied to a heat pump unit, comprising: In response to a defrost trigger command for the heat pump unit, the current water circulation flow rate and current inlet water temperature of the heat pump unit are detected; The defrosting process is matched based on the current water circulation flow rate and the current inlet water temperature to control the heat pump unit to perform defrosting.

[0006] In some implementations, the defrosting process based on the current water circulation flow rate and the current inlet water temperature, in order to control the heat pump unit to perform defrosting, includes: Detect whether the current water circulation flow rate matches the preset defrost flow rate threshold and whether the current inlet water temperature matches the defrost water temperature threshold, and obtain the defrost execution matching result; Based on the defrosting execution matching result, the heat pump unit is controlled to perform defrosting.

[0007] In some embodiments, the defrost water temperature threshold includes a preset first defrost water temperature threshold and a preset second defrost water temperature threshold, wherein the preset second defrost water temperature threshold is greater than the preset first defrost water temperature threshold. The step of controlling the heat pump unit to perform defrosting based on the defrosting execution matching result includes: If the defrosting execution matching result is that the current water circulation flow rate is greater than the preset defrosting flow rate threshold and the current inlet water temperature is greater than the preset first defrosting water temperature threshold, then the heat pump unit is controlled to perform defrosting. or, If the defrosting execution matching result is that the current water circulation flow rate is less than or equal to the preset defrosting flow rate threshold and the current inlet water temperature is greater than the preset second defrosting water temperature threshold, then the heat pump unit is controlled to perform defrosting.

[0008] In some embodiments, controlling the heat pump unit to perform defrosting based on the defrosting execution matching result includes: If the defrosting execution matching result is that the current water circulation flow rate is greater than the preset defrosting flow rate threshold and the current inlet water temperature is less than or equal to the preset first defrosting water temperature threshold, then the heat pump unit is controlled to heat the inlet water temperature and execute the defrosting execution matching process based on the current water circulation flow rate and the current inlet water temperature to control the heat pump unit to perform the defrosting process. or, If the defrosting execution matching result is that the current water circulation flow rate is less than or equal to the preset defrosting flow rate threshold and the current inlet water temperature is less than or equal to the preset second defrosting water temperature threshold, then the heat pump unit is controlled to heat the inlet water temperature and perform defrosting execution matching based on the current water circulation flow rate and the current inlet water temperature, so as to control the heat pump unit to perform the defrosting process.

[0009] In some embodiments, controlling the heat pump unit to heat the inlet water temperature includes: During the heating process of the inlet water, the current inlet water temperature of the heat pump unit is detected; If the current inlet water temperature is higher than the preset first defrosting water temperature threshold, then heating of the inlet water will stop.

[0010] In some embodiments, detecting the current water circulation flow rate and current inlet water temperature of the heat pump unit includes: Adjust the water pump in the heat pump unit to its maximum output power and detect the flow fluctuation of the water circulation flow rate in the heat pump unit; Based on the flow fluctuation amplitude, it is detected whether the heat pump unit is in a stable flow state; If the heat pump unit is in a stable flow state, the current water circulation flow rate and current inlet water temperature of the heat pump unit are detected.

[0011] In some implementations, detecting whether the heat pump unit is in a stable flow state based on the flow fluctuation amplitude includes: If the flow fluctuation amplitude is less than or equal to the preset flow threshold within a preset time period, then the heat pump unit is determined to be in a stable flow state. If the flow rate fluctuation amplitude is greater than the preset flow rate threshold within a preset time period, then the heat pump unit is determined to be in a flow rate fluctuation state.

[0012] Secondly, embodiments of this application also provide a control device for a heat pump unit, comprising: The detection module is used to detect the current water circulation flow rate and current inlet water temperature of the heat pump unit in response to the defrosting trigger command of the heat pump unit; The control module is used to perform defrosting execution matching processing based on the current water circulation flow rate and the current inlet water temperature, so as to control the heat pump unit to perform defrosting processing.

[0013] Thirdly, embodiments of this application also provide a computer-readable storage medium having a computer program stored thereon, which, when run on a computer, causes the computer to execute the control method for a heat pump unit as provided in any embodiment of this application.

[0014] Fourthly, embodiments of this application also provide an electronic device, including a processor and a memory, the memory having a computer program, the processor executing a control method for a heat pump unit as provided in any embodiment of this application by calling the computer program.

[0015] Fifthly, embodiments of this application also provide a computer program product containing instructions that, when the computer program product is run on a computer or processor, cause the computer or processor to execute the control method for a heat pump unit as provided in any embodiment of this application.

[0016] The technical solution provided in this application, in response to a defrosting trigger command for the heat pump unit, detects the current water circulation flow rate and current inlet water temperature of the heat pump unit, and performs defrosting execution matching processing based on the current water circulation flow rate and current inlet water temperature to control the heat pump unit to perform defrosting processing. By accurately matching the pre-detection of water circulation flow rate and inlet water temperature with defrosting execution, the freezing problem of plate heat exchangers caused by insufficient flow and low inlet water temperature is avoided from the source. Therefore, the freezing risk of plate heat exchangers can be effectively avoided in the defrosting control process of the heat pump unit. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a flowchart illustrating a control method for a heat pump unit provided in an embodiment of this application.

[0019] Figure 2 This is a flowchart illustrating another control method for a heat pump unit provided in an embodiment of this application.

[0020] Figure 3 This is a flowchart illustrating another control method for a heat pump unit provided in an embodiment of this application.

[0021] Figure 4 A schematic diagram of the control device for a heat pump unit provided in an embodiment of this application.

[0022] Figure 5 This is a schematic diagram of a first structure of an electronic device provided in an embodiment of this application.

[0023] Figure 6 This is a schematic diagram of a second structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0025] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0026] As a highly efficient energy conversion device, heat pump units are widely used in heating, cooling, and hot water supply due to their energy-saving and environmentally friendly characteristics. They utilize energy by absorbing heat from a lower-grade heat source and transferring it to a higher-grade heat source. The outdoor heat exchanger is the core component for this heat exchange. In low-temperature and high-humidity operating environments, the surface of the outdoor heat exchanger of a heat pump unit is prone to frost formation. The frost layer significantly reduces the heat exchanger's efficiency, leading to a decrease in the heat pump unit's heating capacity and an increase in energy consumption. Therefore, timely defrosting of the outdoor heat exchanger is necessary to ensure the stable operation of the heat pump unit.

[0027] In related technologies, heat pump units still face the risk of plate heat exchanger freezing during defrosting, making it difficult to ensure the operational safety of the equipment during the defrosting process. Therefore, how to effectively avoid the freezing risk of plate heat exchangers during the defrosting control of heat pump units has become an urgent technical problem to be solved in the field of defrosting control for heat pump units.

[0028] To address the deficiencies in the aforementioned related technologies, this application provides a control method for a heat pump unit. The execution entity of this control method can be the control device for the heat pump unit provided in this application, or an electronic device integrating the control device for the heat pump unit. The control device for the heat pump unit can be implemented in hardware or software. The electronic device is the heat pump unit itself.

[0029] Please see Figure 1 , Figure 1 This is a flowchart illustrating a control method for a heat pump unit provided in an embodiment of this application. The control method for a heat pump unit provided in this embodiment is applied to a heat pump unit, and the specific process is as follows: S110. In response to the defrosting trigger command for the heat pump unit, detect the current water circulation flow rate and current inlet water temperature of the heat pump unit.

[0030] Among them, the defrost trigger command refers to the command signal generated and issued by the heat pump unit when it determines that its outdoor heat exchanger has reached the frosting state and needs to start the defrosting-related operation.

[0031] Among them, water circulation flow rate refers to the amount of water circulating within the water circuit system of the heat pump unit per unit time, which is a key parameter reflecting the operating status of the water circuit system.

[0032] The inlet water temperature refers to the real-time temperature of the water entering the plate heat exchanger in the water circuit system of the heat pump unit, which directly affects the operational safety of the plate heat exchanger during the defrosting process.

[0033] In this step, when the heat pump unit issues a defrost trigger command, that is, when the heat pump unit completes the frosting status determination and determines that the defrosting process needs to be started, the heat pump unit will simultaneously start the corresponding flow detection component and temperature detection component in the water circuit system to accurately and synchronously detect the current water circulation flow rate in its own water circuit system and the real-time temperature of the water entering the plate heat exchanger, and completely obtain the current actual operating values ​​of the two parameters, providing data support for the matching judgment of subsequent defrosting execution.

[0034] In one example, when detecting the current water circulation flow rate and current inlet water temperature of the heat pump unit, an integrated water circuit sensing module combining an electromagnetic flow sensor and a temperature sensor can be installed at preset detection points on the main inlet pipe of the heat pump unit's water circuit system and at the inlet of the plate heat exchanger. This module is electrically connected to the main controller of the heat pump unit. When the heat pump unit receives a defrost trigger command, the main controller sends a detection start signal to the sensing module. The electromagnetic flow sensor, through the principle of electromagnetic induction, captures the flow rate of the water in the water circuit in real time and converts it into the water circulation flow rate per unit time, simultaneously outputting the electrical signal data of the current water circulation flow rate. The temperature sensor, through the change in the resistance of the thermistor, senses the temperature of the water at the inlet in real time and outputs the electrical signal data of the current inlet water temperature. After the two types of data are integrated by the sensing module, they are transmitted to the main controller of the heat pump unit in real time through a communication line. The main controller performs analog-to-digital conversion on the electrical signals to obtain the specific values ​​of the current water circulation flow rate and inlet water temperature, completing the detection operation.

[0035] In another example, when detecting the current water circulation flow rate and current inlet water temperature of the heat pump unit, a turbine flow sensor can be installed on the pipeline between the outlet of the circulating pump and the inlet of the plate heat exchanger in the heat pump unit's water circuit system. The turbine blades of this sensor rotate with the water flow, and the rotation frequency is linearly related to the water flow rate. The sensor converts the rotation frequency into a pulse electrical signal, which is transmitted to the main controller of the heat pump unit. The main controller calculates the actual value of the current water circulation flow rate according to a preset frequency-flow conversion formula. Additionally, a platinum resistance temperature sensor can be installed adjacent to the inlet of the plate heat exchanger downstream of the aforementioned turbine flow sensor. This sensor is in direct contact with the inlet water and provides real-time feedback of the inlet water temperature through the linear change of its own resistance value with temperature. After receiving the signal, the main controller of the heat pump unit calibrates and converts it to obtain the accurate value of the current inlet water temperature.

[0036] It should be noted that the heat pump unit applicable in this application is a heat pump unit that uses a plate heat exchanger as an evaporator.

[0037] S120. Perform defrosting matching processing based on the current water circulation flow rate and the current inlet water temperature to control the heat pump unit to perform defrosting processing.

[0038] In this step, the heat pump unit comprehensively compares and analyzes the actual values ​​of the detected water circulation flow rate and inlet water temperature with the pre-set defrosting execution matching standards to complete the matching judgment of defrosting execution and determine whether the current water circuit parameters meet the conditions for safe defrosting. For different matching judgment results, the heat pump unit will execute the corresponding defrosting control strategy. If the parameters meet the safe defrosting conditions, the heat pump unit will immediately execute the defrosting operation; if the parameters do not meet the safe defrosting conditions, the defrosting operation will be reasonably adjusted. Through corresponding adjustment measures, the parameters will be brought to the safe standard before the defrosting operation is executed. This achieves precise control of the defrosting process, avoids the freezing risk of the plate heat exchanger from the source, and ensures the safe and stable operation of the heat pump unit's defrosting process.

[0039] It should be noted that in this application, the heat pump unit can detect the need for defrosting during the heating process through an embedded applet. Then, it will defrost by running the cooling mode, and after defrosting is completed, it will switch back to normal heating operation.

[0040] In practice, this application is not limited by the execution order of the described steps. Without causing conflicts, some steps may be performed in other orders or simultaneously.

[0041] As can be seen from the above, the control method for the heat pump unit provided in this application, in response to the defrosting trigger command for the heat pump unit, detects the current water circulation flow rate and the current inlet water temperature of the heat pump unit, and performs defrosting execution matching processing based on the current water circulation flow rate and the current inlet water temperature to control the heat pump unit to perform defrosting processing. By accurately matching the pre-detection of water circulation flow rate and inlet water temperature with the defrosting execution, the freezing problem of plate heat exchangers caused by insufficient flow and low inlet water temperature is avoided from the source. Therefore, the freezing risk of plate heat exchangers can be effectively avoided in the defrosting control process of the heat pump unit.

[0042] Next, in some implementation methods, please refer to Figure 2 , Figure 2 This is a flowchart illustrating another control method for a heat pump unit provided in an embodiment of this application. When performing the defrosting matching process based on the current water circulation flow rate and the current inlet water temperature in step S120 to control the heat pump unit to perform defrosting, the following steps may be included: S1210. Detect whether the current water circulation flow rate matches the preset defrosting flow rate threshold and whether the current inlet water temperature matches the defrosting water temperature threshold, and obtain the defrosting execution matching result.

[0043] Among them, the preset defrosting flow threshold refers to the critical value of water circulation flow that the heat pump unit sets in advance to ensure the safe operation of the defrosting process. It is the criterion for judging whether the water circulation flow meets the requirements for safe defrosting.

[0044] Among them, the defrosting water temperature threshold refers to the critical value of the inlet water temperature that the heat pump unit sets in advance to avoid the risk of freezing of the plate heat exchanger. It is the criterion for judging whether the inlet water temperature meets the requirements for safe defrosting.

[0045] Among them, the defrosting execution matching result refers to the judgment result on whether the water circuit parameters meet the safe defrosting conditions after comparing the current water circulation flow rate and current inlet water temperature of the heat pump unit with the corresponding preset thresholds.

[0046] In this step, the heat pump unit compares the current water circulation flow rate and current inlet water temperature with pre-set defrost flow rate and defrost water temperature thresholds, respectively. The flow rate matching test determines whether the current water circulation volume meets the basic requirements for safe defrosting, while the water temperature matching test determines whether the current water temperature entering the plate heat exchanger is sufficient to avoid the risk of freezing.

[0047] S1220. Based on the defrosting execution matching result, control the heat pump unit to perform defrosting processing.

[0048] In this step, the heat pump unit executes the corresponding defrosting control strategy based on different matching results. If the defrosting matching result shows that the current water circulation flow rate and inlet water temperature both meet the preset threshold requirements, the heat pump unit will immediately initiate the defrosting procedure. If the defrosting matching result shows that any one or two parameters do not meet the preset threshold requirements, the heat pump unit will temporarily suspend the defrosting operation and initiate corresponding parameter adjustment measures until the water circuit parameters reach the preset threshold and the defrosting matching result meets safety requirements, at which point the heat pump unit will then execute the defrosting process. This step achieves refined control of the defrosting operation through precise correspondence between the matching result and the control strategy, avoiding the risk of freezing of the plate heat exchanger due to substandard parameters, and ensuring the dual safety of the defrosting process and the heat pump unit equipment.

[0049] In some embodiments, the defrost water temperature threshold includes a preset first defrost water temperature threshold and a preset second defrost water temperature threshold, wherein the preset second defrost water temperature threshold is greater than the preset first defrost water temperature threshold. Among them, the preset first defrosting water temperature threshold refers to the minimum critical value of the inlet water temperature that the heat pump unit pre-sets for scenarios where the water circulation flow meets the requirements for safe defrosting. It is the criterion for judging whether the inlet water temperature meets the requirements for safe defrosting in this scenario.

[0050] The preset second defrost water temperature threshold refers to the critical value of the inlet water temperature that the heat pump unit sets in advance for scenarios where the water circulation flow does not meet the requirements for safe defrosting. This preset second defrost water temperature threshold is higher than the preset first defrost water temperature threshold and is the criterion for judging whether the inlet water temperature meets the requirements for safe defrosting in this scenario.

[0051] When controlling the heat pump unit to perform defrosting based on the defrosting execution matching result in step S1220, the following steps may be included: S12210. If the defrosting execution matching result is that the current water circulation flow rate is greater than the preset defrosting flow rate threshold and the current inlet water temperature is greater than the preset first defrosting water temperature threshold, then control the heat pump unit to perform defrosting. This step outlines the defrosting control rules for scenarios where the water circulation flow rate meets the standard. When the defrosting execution matching result shows that the current water circulation flow rate is higher than the preset defrosting flow rate threshold, it indicates that the water circulation is in good condition. In this case, defrosting can be initiated only if the basic safety requirements for the inlet water temperature are met. If the inlet water temperature is also higher than the preset first defrosting water temperature threshold, it indicates that both parameters meet the safe defrosting conditions for this scenario. The plate heat exchanger has no risk of freezing, and the heat pump unit will directly initiate the defrosting program to perform defrosting, balancing the timeliness of defrosting with equipment safety.

[0052] When controlling the heat pump unit to perform defrosting based on the defrosting execution matching result in step S1220, the following steps may be included: S12220. If the defrosting execution matching result is that the current water circulation flow rate is less than or equal to the preset defrosting flow rate threshold and the current inlet water temperature is greater than the preset second defrosting water temperature threshold, then control the heat pump unit to perform defrosting.

[0053] This step outlines the defrosting control rules for scenarios where the water circulation flow rate is below the target. When the defrosting execution matching result shows that the current water circulation flow rate is lower than or equal to the preset defrosting flow rate threshold, it indicates poor water circulation. Slow water flow can easily cause the plate heat exchanger to freeze. In this case, the inlet water temperature criterion needs to be increased. If the inlet water temperature is higher than the preset second defrosting water temperature threshold, the higher water temperature can compensate for the freezing risk caused by insufficient flow, meeting the safe defrosting conditions in this special scenario. The heat pump unit will then initiate the defrosting program and perform defrosting processing, achieving personalized safe defrosting control under different water circuit operating conditions.

[0054] In some implementations, when controlling the heat pump unit to perform defrosting based on the defrosting execution matching result in step S1220, the following steps may be included: S12230. If the defrosting execution matching result is that the current water circulation flow rate is greater than the preset defrosting flow rate threshold and the current inlet water temperature is less than or equal to the preset first defrosting water temperature threshold, then control the heat pump unit to heat the inlet water temperature and execute the defrosting execution matching process based on the current water circulation flow rate and the current inlet water temperature to control the heat pump unit to perform the defrosting process. Among these, heating treatment refers to the operation of the heat pump unit to activate its auxiliary heating module to raise the inlet water temperature of the water system when the inlet water temperature has not reached the defrosting safety threshold. It is a pre-emptive adjustment method to ensure defrosting safety. For example, the heat pump unit can heat the inlet water temperature by turning on an auxiliary heat source, such as an electrically heated small water tank.

[0055] This step describes the defrosting control strategy for scenarios where the water circulation flow rate meets the standard but the inlet water temperature does not. When the defrosting execution matching result shows that the current water circulation flow rate is higher than the preset defrosting flow rate threshold, it indicates that the water circulation status meets the safe defrosting flow rate requirements. However, if the inlet water temperature is lower than or equal to the preset first defrosting water temperature threshold, direct defrosting at this time may easily cause the plate heat exchanger to freeze due to excessively low water temperature. The heat pump unit will first start the heating process to raise the inlet water temperature of the water system. After the heating operation is implemented, the heat pump unit will re-perform the defrosting execution matching process based on the current water circulation flow rate and inlet water temperature, and re-determine whether the parameters meet the safe defrosting conditions. Defrosting will only be performed after the inlet water temperature reaches the standard, ensuring timely defrosting while avoiding the risk of freezing.

[0056] In some implementations, when controlling the heat pump unit to perform defrosting based on the defrosting execution matching result in step S1220, the following steps may be included: S12240. If the defrosting execution matching result is that the current water circulation flow rate is less than or equal to the preset defrosting flow rate threshold and the current inlet water temperature is less than or equal to the preset second defrosting water temperature threshold, then the heat pump unit is controlled to heat the inlet water temperature and perform defrosting execution matching based on the current water circulation flow rate and the current inlet water temperature, so as to control the heat pump unit to perform the defrosting process.

[0057] This step describes the defrosting control strategy for scenarios where both water circulation flow rate and inlet water temperature fail to meet standards. When the defrosting execution matching result shows that the current water circulation flow rate is lower than or equal to the preset defrosting flow rate threshold, and the inlet water temperature is simultaneously lower than or equal to the preset second defrosting water temperature threshold, it indicates that neither the flow rate nor the water temperature of the water system meets the safe defrosting requirements. In this case, direct defrosting would significantly increase the freezing probability of the plate heat exchanger. The heat pump unit will prioritize initiating heating treatment, using an auxiliary heating module to increase the inlet water temperature. After completing the heating operation, the heat pump unit will re-perform the defrosting execution matching treatment based on the current water circulation flow rate and the increased inlet water temperature, re-determining whether the two parameters have reached the corresponding safe defrosting thresholds. This process continues until the parameter matching result meets the requirements before controlling the heat pump unit to perform defrosting treatment. Through pre-conditioning temperature adjustment and repeated matching judgments, the freezing risk caused by the failure of both parameters to meet standards is fundamentally eliminated, ensuring equipment safety during the defrosting process.

[0058] In some embodiments, controlling the heat pump unit to heat the inlet water temperature may include the following steps: (11) During the process of heating the inlet water, the current inlet water temperature of the heat pump unit is detected; In this step, after the heat pump unit starts the auxiliary heating module to heat the inlet water of the water system, it simultaneously activates the temperature detection component to continuously monitor the real-time changes in the inlet water temperature during the heating process, promptly obtaining the actual value of the current inlet water temperature. This step dynamically monitors the rise in inlet water temperature, providing real-time temperature data to support subsequent decisions on whether to stop heating. It prevents excessive temperature increases or failure to reach safe thresholds due to a lack of monitoring during the heating process, ensuring the effectiveness and rationality of the heating treatment.

[0059] (12) If the current inlet water temperature is greater than the preset first defrosting water temperature threshold, then stop heating the inlet water temperature.

[0060] In this step, the heat pump unit compares the current inlet water temperature detected during the heating process with the preset first defrost water temperature threshold in real time. When the actual value of the current inlet water temperature exceeds this threshold, it indicates that the inlet water temperature has been raised to meet the basic temperature requirements for safe defrosting. At this point, continuing heating is meaningless and will cause energy waste. The heat pump unit will immediately control the auxiliary heating module to stop operating, terminating the heating process for the inlet water and maintaining the inlet water temperature within the range that meets the requirements for safe defrosting. Subsequently, the heat pump unit can restart the defrosting execution matching process based on the current water circuit parameters, ensuring equipment safety in the subsequent defrosting process and achieving efficient energy utilization.

[0061] In some implementations, the process of heating the inlet water can be configured to compare the real-time detected current inlet water temperature with a preset second defrost water temperature threshold. When the current inlet water temperature exceeds the preset second defrost water temperature threshold, the heat pump unit is controlled to stop heating the inlet water. Since the preset second defrost water temperature threshold is greater than the preset first defrost water temperature threshold, this method of stopping heating can further improve the safety margin of the inlet water temperature, effectively compensate for the freezing risk caused by insufficient water circulation flow, ensure that the heat pump unit can still safely and stably perform defrosting under low flow conditions, and improve the reliability and adaptability of the defrost control process.

[0062] Furthermore, in some embodiments, controlling the heat pump unit to stop heating the inlet water temperature can also be achieved by limiting the duration. During the heating process, the heat pump unit simultaneously starts a timing module to record the duration of the heating process. The heat pump unit compares the real-time recorded heating duration with a preset heating duration threshold. When the heating duration is detected to have reached the preset heating duration threshold, the heat pump unit directly controls the auxiliary heating module to stop operating, terminating the heating of the inlet water temperature. By limiting the heating duration, the heating process can be prevented from running continuously for an extended period if the inlet water temperature cannot be raised to the target threshold in a short time. The preset heating duration threshold can be set by those skilled in the art based on experience in actual scenarios. This control method can effectively reduce the overall energy consumption of the heat pump unit and reduce unnecessary energy consumption. It also prevents the heating components from overheating, aging, or being damaged due to long-term continuous operation, improving the reliability and service life of the heating components, and further enhancing the overall safety and stability of the heat pump unit.

[0063] In some implementations, detecting the current water circulation flow rate and current inlet water temperature of the heat pump unit may include the following steps: (21) Adjust the water pump in the heat pump unit to the maximum output power and detect the flow fluctuation of the water circulation flow rate in the heat pump unit; The maximum output power refers to the highest operating power that the water pump can achieve. Under this condition, the water pump can provide the maximum water circulation power to the water system.

[0064] Among them, the flow fluctuation amplitude refers to the difference in the water circulation flow rate per unit time in the water circuit system of the heat pump unit, which is an indicator reflecting whether the flow rate is stable.

[0065] In this step, to avoid low or unstable flow rates due to low-power operation of the water pump, which could affect subsequent parameter monitoring and defrosting assessment, the heat pump unit first adjusts the water pumps in the water system to operate at maximum output power, providing a sufficient and stable power foundation for water circulation. Simultaneously, the heat pump unit activates the flow detection component to continuously monitor the fluctuation range of the water circulation flow rate under full-power operation of the water pump, obtaining actual data on flow fluctuations to provide crucial information for subsequent determination of flow stability.

[0066] (22) Detect whether the heat pump unit is in a stable flow state based on the flow fluctuation amplitude; Among them, the stable flow state refers to the operating state in which the water circulation flow of the heat pump unit's water circuit system fluctuates within a preset reasonable range and the flow does not fluctuate significantly.

[0067] In this step, based on the detected flow fluctuation data, the heat pump unit compares and analyzes the data with the preset flow stability judgment standard. By using quantitative indicators, it determines whether the flow of the current water system is in a stable operating state, and clarifies whether formal testing of water circulation flow and inlet water temperature can be carried out subsequently. This avoids the distortion of parameter data caused by testing during flow fluctuations, and ensures the authenticity and validity of the test results.

[0068] In another example, the flow stability of the heat pump unit can be detected by: sampling the water circulation flow rate multiple times within a continuous sampling period, calculating the average flow rate of the multiple sampled flow rates, and calculating the difference between each instantaneous flow rate value and the average flow rate. If the difference between all instantaneous flow rate values ​​and the average flow rate is less than a preset stability difference, the heat pump unit is determined to be in a flow stability state. Alternatively, the flow rate change rate can be calculated based on the flow rate values ​​of two adjacent samples. If the flow rate change rate of all samples within a continuous sampling period is less than a preset change rate threshold, the heat pump unit is determined to be in a flow stability state.

[0069] (23) If the heat pump unit is in a stable flow state, the current water circulation flow rate and the current inlet water temperature of the heat pump unit are detected.

[0070] In this step, if the previous judgment result indicates a stable flow rate, it means that the circulation state of the water system is stable, and the detected parameters accurately reflect the actual operating state of the heat pump unit. The heat pump unit will simultaneously activate the flow and temperature detection components to accurately detect the actual water circulation flow rate of the current water system and the actual inlet water temperature entering the plate heat exchanger, obtaining valid values ​​for both parameters to provide accurate and reliable data support for subsequent defrosting matching processes.

[0071] In some implementations, detecting whether the heat pump unit is in a stable flow state based on the flow fluctuation amplitude may include the following steps: (31) If the flow fluctuation amplitude is less than or equal to the preset flow threshold within a preset time period, then the heat pump unit is determined to be in a stable flow state. The preset duration refers to the pre-set detection time period for flow fluctuation amplitude by the heat pump unit to determine whether the flow rate is stable. This preset duration can be set by those skilled in the art based on experience in actual scenarios.

[0072] In this step, the heat pump unit will continuously compare the detected flow fluctuation amplitude within a preset detection time period. If the actual value of the flow fluctuation amplitude is always less than or equal to the preset flow threshold within the preset time period, it indicates that the flow change of the water system is within a reasonable range without significant fluctuations. Based on this, the heat pump unit will determine that it is currently in a stable flow state and can carry out subsequent formal testing of water circulation flow and inlet water temperature.

[0073] (32) If the flow fluctuation amplitude is greater than the preset flow threshold within a preset time period, the heat pump unit is determined to be in a flow fluctuation state.

[0074] Among them, the flow fluctuation state refers to the water circulation flow fluctuation of the heat pump unit's water circuit system exceeding the preset reasonable range, and the flow is in a state of significant fluctuation.

[0075] The preset flow threshold refers to the critical value for flow fluctuation that the heat pump unit pre-sets to determine whether the flow is stable; it serves as the criterion for judging the flow status. This preset flow threshold can be set by those skilled in the art based on experience from real-world scenarios.

[0076] This step introduces the rules for determining flow fluctuation status. Specifically, if the actual value of the flow fluctuation amplitude exceeds the preset flow threshold within a preset time period, it indicates that the flow rate of the water system is changing too much and is in a state of significant fluctuation. At this time, the detected parameters cannot truly reflect the actual operating status of the heat pump unit. The heat pump unit will determine that it is currently in a flow fluctuation state and will not conduct subsequent formal parameter testing. It will continue to maintain the pump at its maximum output power and monitor the flow fluctuation amplitude until the flow fluctuation amplitude meets the preset standard and enters a stable flow state.

[0077] To better understand the control method of the heat pump unit provided in this application, please refer to... Figure 3 , Figure 3 This is a flowchart illustrating another control method for a heat pump unit provided in an embodiment of this application. The specific execution flow of the above technical solution can be obtained through... Figure 3The flowchart illustrating the defrosting control method for a heat pump unit is presented visually. Starting with a defrosting trigger command, the process achieves precise control of the defrosting operation through pump power adjustment, flow stability determination, dual-parameter detection, and graded matching. It comprehensively covers the entire logic from parameter detection and condition matching to defrosting execution or preheating, corresponding one-to-one with the control rules of the aforementioned technical solutions and implementation methods. This clearly demonstrates the core control path of this application to avoid the freezing risk of plate heat exchangers. The specific process is as follows: The process starts from the initial node and first executes step S1 to determine whether the heat pump unit has received a defrost trigger command. This step is the triggering link of the defrost control process. If the determination result is that no defrost trigger command has been received, the heat pump unit will execute step S9 to maintain normal heating operation, while continuously looping through step S1 to monitor the reception of the defrost trigger command in real time; if the determination result is that a defrost trigger command has been received, then proceed to step S2.

[0078] In step S2, the heat pump unit adjusts its internal water pump to operate at maximum output power while continuously monitoring the fluctuation range of the water circulation flow rate. Once the water circulation flow rate is determined to be stable, the current water circulation flow rate and current inlet water temperature of the heat pump unit are simultaneously monitored. This step, through full-power water pump control and flow stability determination, ensures that the detected water circuit parameters accurately reflect the operating status of the heat pump unit, providing precise data support for subsequent defrosting condition determination.

[0079] After completing the parameter detection, proceed to step S3 to determine whether the current water circulation flow rate exceeds the preset defrosting flow rate threshold. This step will classify two different water temperature determination scenarios based on the flow rate detection results: If step S3 determines that the current water circulation flow rate is greater than the preset defrost flow rate threshold, it indicates that the water circulation status meets the basic flow rate requirements for safe defrosting. At this point, the process proceeds to step S4 to determine if the current inlet water temperature is greater than the preset first defrost water temperature threshold. If step S4 determines that the current inlet water temperature is greater than the preset first defrost water temperature threshold, it means that both the flow rate and water temperature meet the basic safe defrosting conditions. The heat pump unit will execute step S6 to control itself to start the defrosting program and begin defrosting. If step S4 determines that the current inlet water temperature is less than or equal to the preset first defrost water temperature threshold, it means that the water temperature does not meet the safety requirements for this scenario. The heat pump unit will execute step S7 to start the auxiliary heating module to heat the inlet water. After heating is complete, the process returns to step S2 to re-perform water pump power regulation, flow stability determination, and dual-parameter detection.

[0080] If step S3 determines that the current water circulation flow rate is less than or equal to the preset defrost flow rate threshold, it indicates that the water circulation status is poor. In this case, the process proceeds to step S5 to determine if the current inlet water temperature is greater than the preset second defrost water temperature threshold. Because the preset second defrost water temperature threshold is higher than the preset first defrost water temperature threshold, this step compensates for the freezing risk caused by insufficient flow by raising the water temperature judgment standard. If step S5 determines that the current inlet water temperature is greater than the preset second defrost water temperature threshold, it means that the higher water temperature can offset the impact of insufficient flow and meet the safe defrosting conditions. The heat pump unit then executes step S6 to initiate defrosting. If step S5 determines that the current inlet water temperature is less than or equal to the preset second defrost water temperature threshold, it means that both the flow rate and water temperature are not up to standard. The heat pump unit then executes step S7 to heat the inlet water. After heating is completed, the process returns to step S2 to re-complete the parameter detection and status determination for the entire process.

[0081] After the heat pump unit performs the defrosting process in step S6, and the defrosting procedure is completed, step S8 will be executed to confirm the end of defrosting. Then the process will proceed to step S9, where the heat pump unit will resume normal heating operation and wait for the next defrosting trigger command. This completes one cycle of the entire defrosting control process.

[0082] This application, through the aforementioned process control, can accurately detect the water circulation flow rate and inlet water temperature before the defrosting process begins, ensuring the authenticity and reliability of the detection data. By judging the stable flow state, it can avoid the distortion of detection results caused by flow fluctuations, improving the accuracy of defrosting condition judgment. By setting multi-level defrosting water temperature thresholds, it can match corresponding defrosting judgment conditions according to different flow states, ensuring timely defrosting while effectively improving the safety of the defrosting process. When parameters do not meet the safe defrosting requirements, by heating the inlet water temperature and re-judging, the water circuit parameters can be gradually brought to the safe standard, fundamentally preventing the plate heat exchanger from freezing. The overall control process has clear logic and stable and reliable execution, ensuring the normal realization of the defrosting function of the heat pump unit and significantly improving the safety and stability of the heat pump unit in low-temperature environments, extending the service life of the equipment.

[0083] In one embodiment, a control device for a heat pump unit is also provided. See also... Figure 4 , Figure 4 This is a schematic diagram of the structure of the control device 200 for a heat pump unit provided in an embodiment of this application. The control device 200 is applied to electronic equipment and includes a detection module 201 and a control module 202, as follows: Detection module 201 is used to detect the current water circulation flow rate and current inlet water temperature of the heat pump unit in response to the defrosting trigger command for the heat pump unit; The control module 202 is used to perform defrosting execution matching processing based on the current water circulation flow rate and the current inlet water temperature, so as to control the heat pump unit to perform defrosting processing.

[0084] In some implementations, the control module 202 is specifically used for: Detect whether the current water circulation flow rate matches the preset defrost flow rate threshold and whether the current inlet water temperature matches the defrost water temperature threshold, and obtain the defrost execution matching result; Based on the defrosting execution matching result, the heat pump unit is controlled to perform defrosting.

[0085] In some embodiments, the defrost water temperature threshold includes a preset first defrost water temperature threshold and a preset second defrost water temperature threshold, wherein the preset second defrost water temperature threshold is greater than the preset first defrost water temperature threshold. The control module 202 is specifically used for: If the defrosting execution matching result is that the current water circulation flow rate is greater than the preset defrosting flow rate threshold and the current inlet water temperature is greater than the preset first defrosting water temperature threshold, then the heat pump unit is controlled to perform defrosting. or, If the defrosting execution matching result is that the current water circulation flow rate is less than or equal to the preset defrosting flow rate threshold and the current inlet water temperature is greater than the preset second defrosting water temperature threshold, then the heat pump unit is controlled to perform defrosting.

[0086] In some implementations, the control module 202 is specifically used for: If the defrosting execution matching result is that the current water circulation flow rate is greater than the preset defrosting flow rate threshold and the current inlet water temperature is less than or equal to the preset first defrosting water temperature threshold, then the heat pump unit is controlled to heat the inlet water temperature and execute the defrosting execution matching process based on the current water circulation flow rate and the current inlet water temperature to control the heat pump unit to perform the defrosting process. or, If the defrosting execution matching result is that the current water circulation flow rate is less than or equal to the preset defrosting flow rate threshold and the current inlet water temperature is less than or equal to the preset second defrosting water temperature threshold, then the heat pump unit is controlled to heat the inlet water temperature and perform defrosting execution matching based on the current water circulation flow rate and the current inlet water temperature, so as to control the heat pump unit to perform the defrosting process.

[0087] In some implementations, the control module 202 is specifically used for: During the heating process of the inlet water, the current inlet water temperature of the heat pump unit is detected; If the current inlet water temperature is higher than the preset first defrosting water temperature threshold, then heating of the inlet water will stop.

[0088] In some implementations, the detection module 201 is specifically used for: Adjust the water pump in the heat pump unit to its maximum output power and detect the flow fluctuation of the water circulation flow rate in the heat pump unit; Based on the flow fluctuation amplitude, it is detected whether the heat pump unit is in a stable flow state; If the heat pump unit is in a stable flow state, the current water circulation flow rate and current inlet water temperature of the heat pump unit are detected.

[0089] In some implementations, the detection module 201 is specifically used for: If the flow fluctuation amplitude is less than or equal to the preset flow threshold within a preset time period, then the heat pump unit is determined to be in a stable flow state. If the flow rate fluctuation amplitude is greater than the preset flow rate threshold within a preset time period, then the heat pump unit is determined to be in a flow rate fluctuation state.

[0090] It should be noted that the control device for the heat pump unit provided in this application embodiment and the control method for the heat pump unit in the above embodiment belong to the same concept. The control device for the heat pump unit can realize any of the methods provided in the control method embodiment of the heat pump unit. For details of the specific implementation process, please refer to the control method embodiment of the heat pump unit, which will not be repeated here.

[0091] Furthermore, to better implement the control method of the heat pump unit in the embodiments of this application, this application also provides an electronic device, which is a heat pump unit, based on the control method of the heat pump unit. Please refer to [link / reference]. Figure 5 , Figure 5 This is a schematic diagram of a first structure of an electronic device provided in an embodiment of this application. The electronic device 300 includes a processor 301 and a memory 302. The processor 301 and the memory 302 are electrically connected.

[0092] The processor 301 is the control center of the electronic device 300. It connects various parts of the electronic device via various interfaces and lines, and executes various functions and processes data by running or calling computer programs stored in the memory 302 and accessing data stored in the memory 302, thereby providing overall monitoring of the electronic device. The processor 301 can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or any conventional processor.

[0093] The memory 302 can be used to store computer programs and data. The computer programs stored in the memory 302 contain instructions that can be executed in the processor. The computer programs can be composed of various functional modules. The processor 401 executes various functional applications and data processing by calling the computer programs stored in the memory 302. The memory 302 may mainly include a program storage area and a data storage area. The program storage area may store the operating system, application programs required for at least one function (such as sound playback function, image playback function, etc.), etc.; the data storage area may store data created according to the use of the electronic device 300 (such as audio data, video data, etc.). In addition, the memory may include high-speed random access memory, and may also include non-volatile memory, such as hard disk, RAM, plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0094] In this embodiment, the processor 301 in the electronic device 300 loads the instructions corresponding to the processes of one or more computer programs into the memory 302 according to the following steps, and the processor 401 runs the computer programs stored in the memory 302 to realize various functions: In response to a defrost trigger command for the heat pump unit, the current water circulation flow rate and current inlet water temperature of the heat pump unit are detected; The defrosting process is matched based on the current water circulation flow rate and the current inlet water temperature to control the heat pump unit to perform defrosting.

[0095] In some implementations, please refer to Figure 6 , Figure 6 This is a second structural schematic diagram of the electronic device provided in an embodiment of this application. The electronic device 300 further includes: a radio frequency circuit 303, a display screen 304, a control circuit 305, an input unit 306, an audio circuit 307, a sensor 308, and a power supply 309. The processor 301 is electrically connected to the radio frequency circuit 303, the display screen 304, the control circuit 305, the input unit 306, the audio circuit 307, the sensor 308, and the power supply 309.

[0096] The radio frequency circuit 303 is used to transmit and receive radio frequency signals to communicate with network devices or other electronic devices via wireless communication.

[0097] The display screen 304 can be used to display information input by the user or information provided to the user, as well as various graphical user interfaces of electronic devices, which can be composed of images, text, icons, videos, and any combination thereof.

[0098] The control circuit 305 is electrically connected to the display screen 304 and is used to control the display screen 304 to display information.

[0099] The input unit 306 can be used to receive input numeric or character information or user characteristic information (such as fingerprints), and to generate keyboard, mouse, joystick, optical, or trackball signal inputs related to user settings and function control. The input unit 306 may include a fingerprint recognition module.

[0100] The audio circuit 307 provides an audio interface between the user and the electronic device via a speaker and a microphone. The audio circuit 307 includes a microphone, which is electrically connected to the processor 301. The microphone is used to receive voice information input by the user.

[0101] Sensor 308 is used to collect information about the external environment. Sensor 308 may include one or more sensors such as an ambient light sensor, an accelerometer, and a gyroscope.

[0102] The power supply 309 is used to supply power to the various components of the electronic device 300. In some embodiments, the power supply 309 can be logically connected to the processor 301 through a power management system, thereby enabling functions such as managing charging, discharging, and power consumption through the power management system.

[0103] Although not shown in the figure, electronic device 300 may also include a camera, Bluetooth module, etc., which will not be described in detail here.

[0104] In this embodiment, the processor 301 in the electronic device 300 loads the instructions corresponding to the processes of one or more computer programs into the memory 302 according to the following steps, and the processor 301 runs the computer programs stored in the memory 302 to realize various functions: In response to a defrost trigger command for the heat pump unit, the current water circulation flow rate and current inlet water temperature of the heat pump unit are detected; The defrosting process is matched based on the current water circulation flow rate and the current inlet water temperature to control the heat pump unit to perform defrosting.

[0105] In some implementations, when processor 301 executes the defrosting matching process based on the current water circulation flow rate and the current inlet water temperature to control the heat pump unit to perform defrosting, it may perform the following: Detect whether the current water circulation flow rate matches the preset defrost flow rate threshold and whether the current inlet water temperature matches the defrost water temperature threshold, and obtain the defrost execution matching result; Based on the defrosting execution matching result, the heat pump unit is controlled to perform defrosting.

[0106] In some embodiments, the defrost water temperature threshold includes a preset first defrost water temperature threshold and a preset second defrost water temperature threshold, wherein the preset second defrost water temperature threshold is greater than the preset first defrost water temperature threshold. When the processor 301 executes the command to control the heat pump unit to perform defrost processing based on the defrost execution matching result, it may execute: If the defrosting execution matching result is that the current water circulation flow rate is greater than the preset defrosting flow rate threshold and the current inlet water temperature is greater than the preset first defrosting water temperature threshold, then the heat pump unit is controlled to perform defrosting. or, If the defrosting execution matching result is that the current water circulation flow rate is less than or equal to the preset defrosting flow rate threshold and the current inlet water temperature is greater than the preset second defrosting water temperature threshold, then the heat pump unit is controlled to perform defrosting.

[0107] In some implementations, when processor 301 executes the command to control the heat pump unit to perform defrosting based on the defrosting execution matching result, it may perform the following: If the defrosting execution matching result is that the current water circulation flow rate is greater than the preset defrosting flow rate threshold and the current inlet water temperature is less than or equal to the preset first defrosting water temperature threshold, then the heat pump unit is controlled to heat the inlet water temperature and execute the defrosting execution matching process based on the current water circulation flow rate and the current inlet water temperature to control the heat pump unit to perform the defrosting process. or, If the defrosting execution matching result is that the current water circulation flow rate is less than or equal to the preset defrosting flow rate threshold and the current inlet water temperature is less than or equal to the preset second defrosting water temperature threshold, then the heat pump unit is controlled to heat the inlet water temperature and perform defrosting execution matching based on the current water circulation flow rate and the current inlet water temperature, so as to control the heat pump unit to perform the defrosting process.

[0108] In some embodiments, when processor 301 executes the control of the heat pump unit to heat the inlet water temperature, it may perform the following: During the heating process of the inlet water, the current inlet water temperature of the heat pump unit is detected; If the current inlet water temperature is higher than the preset first defrosting water temperature threshold, then heating of the inlet water will stop.

[0109] In some implementations, when processor 301 performs the function of detecting the current water circulation flow rate and current inlet water temperature of the heat pump unit, it may perform the following: Adjust the water pump in the heat pump unit to its maximum output power and detect the flow fluctuation of the water circulation flow rate in the heat pump unit; Based on the flow fluctuation amplitude, it is detected whether the heat pump unit is in a stable flow state; If the heat pump unit is in a stable flow state, the current water circulation flow rate and current inlet water temperature of the heat pump unit are detected.

[0110] In some implementations, when processor 301 performs the step of detecting whether the heat pump unit is in a stable flow state based on the flow fluctuation amplitude, it may perform the following: If the flow fluctuation amplitude is less than or equal to the preset flow threshold within a preset time period, then the heat pump unit is determined to be in a stable flow state. If the flow rate fluctuation amplitude is greater than the preset flow rate threshold within a preset time period, then the heat pump unit is determined to be in a flow rate fluctuation state.

[0111] This application also provides a computer-readable storage medium storing a computer program. When the computer program is run on a computer, the computer executes the control method of the heat pump unit described in any of the above embodiments.

[0112] It should be noted that those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, which may include, but is not limited to, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk, etc.

[0113] This application also provides a computer program product containing instructions that, when the computer program product is run on a computer or processor, cause the computer or processor to execute the control method of the heat pump unit described in any of the above embodiments.

[0114] Furthermore, the terms "first," "second," and "third," etc., used in this application are used to distinguish different objects, not to describe a specific order. Additionally, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or modules is not limited to the listed steps or modules, but some embodiments may also include steps or modules not listed, or some embodiments may include other steps or modules inherent to these processes, methods, products, or devices.

[0115] The control method, apparatus, storage medium, and electronic equipment of the heat pump unit provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this application; at the same time, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A control method for a heat pump unit, characterized in that, Applications in heat pump units include: In response to a defrost trigger command for the heat pump unit, the current water circulation flow rate and current inlet water temperature of the heat pump unit are detected; The defrosting process is matched based on the current water circulation flow rate and the current inlet water temperature to control the heat pump unit to perform defrosting.

2. The method according to claim 1, characterized in that, The defrosting process based on the current water circulation flow rate and the current inlet water temperature, in order to control the heat pump unit to perform defrosting, includes: Detect whether the current water circulation flow rate matches the preset defrost flow rate threshold and whether the current inlet water temperature matches the defrost water temperature threshold, and obtain the defrost execution matching result; Based on the defrosting execution matching result, the heat pump unit is controlled to perform defrosting.

3. The method according to claim 2, characterized in that, The defrosting water temperature threshold includes a preset first defrosting water temperature threshold and a preset second defrosting water temperature threshold, wherein the preset second defrosting water temperature threshold is greater than the preset first defrosting water temperature threshold. The step of controlling the heat pump unit to perform defrosting based on the defrosting execution matching result includes: If the defrosting execution matching result is that the current water circulation flow rate is greater than the preset defrosting flow rate threshold and the current inlet water temperature is greater than the preset first defrosting water temperature threshold, then the heat pump unit is controlled to perform defrosting. or, If the defrosting execution matching result is that the current water circulation flow rate is less than or equal to the preset defrosting flow rate threshold and the current inlet water temperature is greater than the preset second defrosting water temperature threshold, then the heat pump unit is controlled to perform defrosting.

4. The method according to claim 2, characterized in that, The step of controlling the heat pump unit to perform defrosting based on the defrosting execution matching result includes: If the defrosting execution matching result is that the current water circulation flow rate is greater than the preset defrosting flow rate threshold and the current inlet water temperature is less than or equal to the preset first defrosting water temperature threshold, then the heat pump unit is controlled to heat the inlet water temperature and execute the defrosting execution matching process based on the current water circulation flow rate and the current inlet water temperature to control the heat pump unit to perform the defrosting process. or, If the defrosting execution matching result is that the current water circulation flow rate is less than or equal to the preset defrosting flow rate threshold and the current inlet water temperature is less than or equal to the preset second defrosting water temperature threshold, then the heat pump unit is controlled to heat the inlet water temperature and perform defrosting execution matching based on the current water circulation flow rate and the current inlet water temperature, so as to control the heat pump unit to perform the defrosting process.

5. The method according to claim 4, characterized in that, The control of the heat pump unit to heat the inlet water temperature includes: During the heating process of the inlet water, the current inlet water temperature of the heat pump unit is detected; If the current inlet water temperature is higher than the preset first defrosting water temperature threshold, then heating of the inlet water will stop.

6. The method according to claim 1, characterized in that, The detection of the current water circulation flow rate and current inlet water temperature of the heat pump unit includes: Adjust the water pump in the heat pump unit to its maximum output power and detect the flow fluctuation of the water circulation flow rate in the heat pump unit; Based on the flow fluctuation amplitude, it is detected whether the heat pump unit is in a stable flow state; If the heat pump unit is in a stable flow state, the current water circulation flow rate and current inlet water temperature of the heat pump unit are detected.

7. The method according to claim 6, characterized in that, The step of detecting whether the heat pump unit is in a stable flow state based on the flow fluctuation amplitude includes: If the flow fluctuation amplitude is less than or equal to the preset flow threshold within a preset time period, then the heat pump unit is determined to be in a stable flow state. If the flow rate fluctuation amplitude is greater than the preset flow rate threshold within a preset time period, then the heat pump unit is determined to be in a flow rate fluctuation state.

8. A control device for a heat pump unit, characterized in that, include: The detection module is used to detect the current water circulation flow rate and current inlet water temperature of the heat pump unit in response to the defrosting trigger command of the heat pump unit; The control module is used to perform defrosting execution matching processing based on the current water circulation flow rate and the current inlet water temperature, so as to control the heat pump unit to perform defrosting processing.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is run on a computer, it causes the computer to perform the control method for the heat pump unit as described in any one of claims 1 to 7.

10. An electronic device comprising a processor and a memory, the memory storing a computer program, characterized in that, The processor executes the control method for the heat pump unit as described in any one of claims 1 to 7 by invoking the computer program.

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