Defrosting control method, device and equipment and storage medium

Abstract

The invention relates to the technical field of defrosting control, and discloses a defrosting control method, device and equipment and a storage medium, which are used for adaptively selecting a defrosting mode and a defrosting trigger threshold value according to a plurality of heat pump operating parameters, improving the judgment precision of a defrosting entering opportunity, reducing the false defrosting rate, improving the defrosting efficiency and guaranteeing the comfort of a user. The defrosting control method comprises the steps that a target defrosting mode is determined according to a current first operation parameter set; according to a current second operation parameter set, a defrosting triggering threshold value for triggering defrosting in the target defrosting mode is adjusted, a target defrosting triggering threshold value is obtained, the current second operation parameter set at least comprises environment humidity, and the current second operation parameter set at least comprises the environment humidity; and according to the target defrosting mode, a current third operation parameter set and the target defrosting trigger threshold value, the heat pump is controlled to conduct defrosting.

Description

Technical Field

[0001] The present application relates to the technical field of defrost control, and in particular to a defrost control method, device, equipment and storage medium. Background Art

[0002] Heat exchange through heat exchange components is widely used in various temperature control scenarios. Among them, heat pump technology has the advantages of energy saving, environmental protection, and easy maintenance. It is popular as a heat source. However, the heat exchange coil in the heat pump system may frost during operation. The formation of frost hinders the transfer of heat, significantly reduces the heating efficiency of the system, and leads to increased energy consumption. Therefore, reliable defrosting technology is essential to ensure the efficient operation of the heat pump system.

[0003] Traditional defrosting solutions usually rely on fixed defrosting cycles and coil temperatures to confirm the timing of defrosting. They are less flexible and cannot dynamically adapt to complex environmental changes. They are prone to misjudgment, resulting in excessive defrosting or delayed defrosting. Frequent system defrosting will reduce system efficiency and increase system energy consumption. Unnecessary fluctuations in the temperature controlled by the heat pump system will affect user comfort, and increased compressor load will affect equipment life. Traditional defrosting solutions are difficult to achieve an effective balance between energy saving, efficient defrosting and user comfort. Summary of the invention

[0004] The present application provides a defrost control method, device, equipment and storage medium for selecting an appropriate defrost mode, realizing adaptive adjustment of the defrost threshold to various working conditions, improving the accuracy of defrost execution judgment, reducing the false defrost rate, and ensuring user comfort.

[0005] A first aspect of the present application provides a defrost control method, comprising: determining a target defrost mode according to a current first operating parameter set, wherein the first operating parameter set is used to indicate a heat pump operating parameter set associated with determining the target defrost mode;

[0006] adjusting a defrost triggering threshold for triggering defrosting in the target defrost mode according to a current second operating parameter set to obtain a target defrost triggering threshold, wherein the second operating parameter set is used to indicate a heat pump operating parameter set associated with adjusting the defrost triggering threshold in the target defrost mode, and the second operating parameter set at least includes ambient humidity;

[0007] The heat pump is controlled to perform defrosting according to the target defrost mode, the current third operating parameter set and the target defrost trigger threshold, wherein the third operating parameter set is used to indicate a heat pump operating parameter set associated with confirming a defrost demand under the target defrost mode.

[0008] A second aspect of the present application provides a defrost control device, comprising: a mode determination module, configured to determine a target defrost mode according to a current first operating parameter set, wherein the first operating parameter set is used to indicate a heat pump operating parameter set associated with determining the target defrost mode;

[0009] a threshold adjustment module, configured to adjust a defrost triggering threshold for triggering defrosting in the target defrost mode according to a current second operating parameter set to obtain a target defrost triggering threshold, wherein the second operating parameter set is used to indicate a heat pump operating parameter set associated with adjusting the defrost triggering threshold in the target defrost mode, wherein the second operating parameter set at least includes ambient humidity;

[0010] A defrost control module is used to control the heat pump to defrost according to the target defrost mode, the current third operating parameter set and the target defrost trigger threshold, wherein the third operating parameter set is used to indicate the heat pump operating parameter set associated with confirming the defrost demand under the target defrost mode.

[0011] A third aspect of the present application provides a defrost control device, comprising: a memory and at least one processor, wherein the memory stores instructions; the at least one processor calls the instructions in the memory so that the defrost control device executes the above-mentioned defrost control method.

[0012] A fourth aspect of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores instructions, which, when executed on a computer, enable the computer to execute the above-mentioned defrost control method.

[0013] In the technical solution provided by the present application, the target defrost mode is determined according to the first operating parameter set, and the optimal defrost mode is adapted for various working conditions, so as to avoid the setting of the same defrost entry conditions for each working condition in the traditional solution, resulting in poor defrosting effect, affecting the normal operation of the heat pump system and bringing about problems such as increased energy consumption and reduced user comfort, and improving the adaptability of the defrost mode to different working conditions; further, the defrost trigger threshold is dynamically adjusted according to the second operating parameter set, so that the defrost trigger condition is adaptable to different working conditions. This dynamic adjustment mechanism ensures that the defrost operation is carried out at the best time, which not only avoids the increase in energy consumption caused by excessive defrosting, but also prevents the decrease in system efficiency caused by delayed defrosting, and achieves the dual goals of energy saving and efficient defrosting. Based on the third operating parameter set and the target defrost trigger threshold corresponding to the target defrost mode, the execution of the defrost operation is accurately controlled, which reduces the unnecessary fluctuation of the temperature controlled by the system due to the frequent start of defrosting by the system and improves the user's comfort. It effectively solves the deficiency of the traditional heat pump system that only a single defrost scheme is set, which helps to extend the service life of the heat pump system. It achieves an effective balance between energy saving, efficient defrosting, user comfort and equipment life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of a first embodiment of the defrost control method in this application;

[0015] Figure 2 This is a schematic diagram of a second embodiment of the defrost control method in this application;

[0016] Figure 3 This is a schematic diagram of a third embodiment of the defrost control method in this application;

[0017] Figure 4 It is a schematic diagram of dynamic slip compensation under low ambient temperature in this application;

[0018] Figure 5 This is a schematic diagram of a fourth embodiment of the defrost control method in the present application;

[0019] Figure 6 It is a schematic diagram of an embodiment of a defrost control device in the present application;

[0020] Figure 7 It is a schematic diagram of another embodiment of the defrost control device in the present application;

[0021] Figure 8 It is a schematic diagram of an embodiment of the defrost control device in the present application. DETAILED DESCRIPTION

[0022] The present application provides a defrost control method, device, equipment and storage medium, which are used to solve the problem that traditional defrost solutions are single, low in flexibility, cannot adapt to various working conditions, and are prone to misjudgment leading to excessive defrosting or delayed defrosting.

[0023] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including" or "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0024] For ease of understanding, the specific process of this application is described below. Figure 1 , the first embodiment of the defrost control method in the present application includes:

[0025] 101. Determine a target defrost mode according to a current first operating parameter set.

[0026] It is understandable that the execution subject of the present application can be a defrost control device, or various heat pumps, heat pump control equipment, heat pump systems and other terminals or servers, wherein the heat pump can be a heat pump air conditioner or a swimming pool heat pump, and under appropriate circumstances, it can also be applied to defrost control of air conditioners and other temperature control equipment, which is not limited here. This embodiment is described by taking the heat pump system as the execution subject as an example.

[0027] The heat pump system of this embodiment includes several sensors for collecting heat pump operating parameters, a controller responsible for data processing, comprehensive judgment and execution of commands, and an actuator for performing actual defrosting operations, wherein the sensors include ambient temperature and humidity sensors, coil temperature sensors, frost thickness sensors, compressor suction pressure sensors, etc.; the controller may be an embedded microprocessor; the actuator may be a compressor, a four-way valve, etc., without specific limitation.

[0028] The heat pump system collects multiple heat pump operating parameters through various sensors and transmits them to the controller to execute the defrost control method provided in this embodiment. When defrosting is triggered, the controller sends a defrost control instruction to the actuator, and the actuator performs the corresponding defrost action to achieve defrosting, such as controlling the four-way valve to switch to the defrost mode, and after the defrost is completed, the system is restored according to the set reset logic to continue to execute the original working mode.

[0029] In this embodiment, the heat pump operating parameters are used to indicate the current operating parameters and state parameters of the heat pump, which include but are not limited to ambient temperature, ambient humidity, frost thickness, coil temperature, compressor suction pressure, etc.

[0030] Specifically, a target defrost mode is determined from a plurality of candidate defrost modes according to the current first operating parameter set, wherein the first operating parameter set includes at least one heat pump operating parameter, and each candidate defrost mode determines the defrost demand in a different manner. In this embodiment, corresponding defrost modes are set in the heat pump system according to different operating conditions and heat pump states of the heat pump system, so that the optimal defrost demand confirmation method can be used under different operating conditions and heat pump operating states, so as to ensure the adaptability and accuracy of the defrost judgment to the environment.

[0031] The above-mentioned first operating parameter set is used to indicate the associated parameter set for determining the target defrost mode. The first operating parameter set may include only the ambient temperature; the first operating parameter set may also include the ambient temperature and the thickness of the frost layer; the heat pump operating parameters included in the first operating parameter set may be set according to actual conditions, without any specific restrictions.

[0032] In this embodiment, the number of candidate defrost modes can be two or more, and the different ways of determining the defrost requirement may be different combinations of selected types of triggering defrost parameters and / or different calculation methods. Each candidate defrost mode may include at least one type of triggering defrost parameter.

[0033] It is understandable that the frequency and degree of frosting are related to various factors, and the state parameters of the heat pump under frosting conditions are different from those under normal working conditions. The defrosting demand confirmation methods corresponding to various working conditions are also different. The types of defrosting triggering thresholds corresponding to the candidate defrosting modes may be the same or different. For example, the coil temperature threshold is used as the triggering threshold for triggering the defrosting mode; for another example, the low ambient temperature defrosting mode uses the coil temperature threshold as the triggering threshold for triggering the defrosting mode, while the high ambient temperature defrosting mode uses the defrosting threshold as the triggering threshold for triggering the defrosting mode; the frost layer thickness defrosting mode uses the thickness threshold as the triggering threshold for triggering the defrosting mode, etc. This embodiment matches the optimal defrosting mode through the first operating parameter set to ensure that the defrosting demand can be accurately calculated under various working conditions.

[0034] It is understandable that under low ambient temperature, the increase of ambient humidity has a significant impact on the frequency and degree of frosting, while under high ambient temperature, even if the ambient humidity is high, the accumulation of frost is much slower than under low temperature environment. In this embodiment, the high ambient temperature defrost mode and the low ambient temperature defrost mode have different defrost entry conditions. In the low ambient temperature defrost mode, ambient humidity and ambient temperature are the main frosting factors to be considered. In addition to ambient humidity and ambient temperature, the high ambient temperature defrost mode also needs to further combine other heat pump operation parameters to comprehensively formulate a defrost plan.

[0035] It should be further explained that the above-mentioned candidate defrost modes are only examples. The corresponding combination of triggering defrost parameters can also be set and selected according to actual needs, including but not limited to the defrost mode set by a combination of one or more of the heat pump operating time, compressor operating time, ring pipe temperature difference, ring evaporator temperature difference, return water temperature, etc.

[0036] 102. Adjust a defrost triggering threshold for triggering defrosting in a target defrost mode according to a current second operating parameter set to obtain a target defrost triggering threshold.

[0037] In this embodiment, the second operating parameter set is used to indicate the associated parameter set for adjusting the defrost trigger threshold. The current second operating parameter set includes at least ambient humidity. The second operating parameter set may only include ambient humidity; the second operating parameter set may also include ambient temperature and ambient humidity; the second operating parameter set may also include ambient humidity and compressor load; the heat pump operating parameters included in the second operating parameter set may be set according to actual conditions, without specific restrictions.

[0038] In this embodiment, the defrost trigger threshold adjustment method selected by each candidate mode may be the same or different, wherein the defrost trigger threshold adjustment method includes the type of heat pump operating parameter selected for adjustment and the threshold adjustment logic.

[0039] Among them, the threshold adjustment logic includes but is not limited to adjusting the defrost trigger threshold based on multiple gears, adjusting the defrost trigger threshold through dynamic slip compensation, adjusting the defrost trigger threshold based on feedback from the previous defrost, adjusting the defrost trigger threshold based on multi-factor weighting, etc., and can also be further combined with neural networks and other factors to comprehensively consider multiple influencing factors to adjust the defrost trigger threshold.

[0040] Optionally, if the target defrost mode is a low ambient temperature defrost mode, the coil temperature threshold for triggering defrost is dynamically slip compensated according to the ambient humidity and ambient temperature to obtain the target coil temperature threshold; if the target defrost mode is a high ambient temperature defrost mode, the initial defrost score threshold is dynamically slip compensated according to the ambient humidity and compressor load to obtain the target defrost score threshold. This embodiment selects different parameter types for different defrost modes to perform dynamic slip compensation on the defrost trigger threshold to meet the adjustment requirements of the defrost trigger threshold in different modes.

[0041] 103. Perform defrost control according to the target defrost mode, the current third operating parameter set and the target defrost trigger threshold.

[0042] Specifically, the current third operating parameter set is determined based on the target defrost mode, and the current defrost demand is determined based on the third operating parameter set; it is judged whether the current defrost demand reaches the target defrost trigger threshold; if so, defrost is started; if not, monitoring is continued.

[0043] It should be further explained that the heat pump system divides the collected current multiple heat pump operating parameters into three operating parameter sets according to different needs, namely, a first operating parameter set for determining the target defrost mode, a second operating parameter set for adjusting the defrost trigger threshold, and a third operating parameter set for determining the current defrost requirement.

[0044] The above three operating parameter sets each include at least one current heat pump operating parameter. The parameter types included in each operating parameter set may be the same or different, without specific limitation. Among them, the first operating parameter set is used to indicate the heat pump operating parameter set associated with determining the target defrost mode, the second operating parameter set is used to indicate the heat pump operating parameter set associated with adjusting the defrost trigger threshold under the target defrost mode, and the third operating parameter set is used to indicate the heat pump operating parameter set associated with confirming the defrost demand under the target defrost mode.

[0045] It can be understood that adaptively determining the target defrost mode based on the first set of operating parameters is a preliminary guarantee that the selected defrost mode can better adapt to the working conditions and heat pump status, while adaptively determining the defrost trigger threshold based on the second set of operating parameters is to further determine the defrost start time, so that the heat pump system can start the defrost mode at the most appropriate time to avoid energy efficiency reduction or equipment damage caused by early or late defrosting. Controlling the defrost start based on the third set of operating parameters is to evaluate the current defrost demand under the target mode. The three complement each other and jointly ensure the high efficiency, energy saving and user comfort of the heat pump system during the defrost process.

[0046] In this embodiment, the target defrost mode is determined according to the first operating parameter set, and the optimal defrost mode is adapted for various working conditions, so as to avoid the traditional scheme of setting the same defrost entry conditions for each working condition, resulting in poor defrosting effect, affecting the normal operation of the heat pump system, and bringing about problems such as increased energy consumption and reduced user comfort, thereby improving the adaptability of the defrost mode to different working conditions; further, the defrost trigger threshold is dynamically adjusted according to the second operating parameter set, so that the defrost trigger condition is adaptable to different working conditions. This dynamic adjustment mechanism ensures that the defrost operation is performed at the best time, which not only avoids the increase in energy consumption caused by excessive defrosting, but also prevents the decrease in system efficiency caused by delayed defrosting, and achieves the dual goals of energy saving and efficient defrosting. Based on the third operating parameter set and the target defrost trigger threshold corresponding to the target defrost mode, the execution of the defrost operation is accurately controlled, which reduces the unnecessary fluctuation of the temperature controlled by the system due to the frequent start of defrosting by the system and improves the user's comfort. The deficiency of the traditional heat pump system only setting a single defrost scheme is effectively solved, which helps to extend the service life of the heat pump system. An effective balance between energy saving, efficient defrosting, user comfort and equipment life is achieved.

[0047] See also Figure 2 , the second embodiment of the defrost control method in the present application includes:

[0048] 201. Determine whether the current frost layer thickness is greater than or equal to a preset thickness threshold.

[0049] Specifically, the heat pump system obtains the current frost layer thickness according to a preset sampling frequency, and compares the current frost layer thickness with a preset thickness threshold, that is, the first operating parameter set of this embodiment includes the frost layer thickness and the ambient temperature.

[0050] 202. If not, determine the target defrost mode in the low ambient temperature defrost mode and the non-low ambient temperature defrost mode according to the ambient temperature.

[0051] In this embodiment, the non-low ambient temperature defrost mode can be a normal ambient temperature defrost mode, a high ambient temperature defrost mode or other defrost modes. Specifically, at least one ambient temperature threshold can be set to divide the ambient temperature interval to select the corresponding candidate defrost mode as the target defrost mode.

[0052] Optionally, if the thickness of the frost layer is less than a preset thickness threshold, determine whether the ambient temperature is greater than or equal to the preset ambient temperature threshold; if the ambient temperature is greater than or equal to the preset ambient temperature threshold, the non-low ambient temperature defrost mode is confirmed as the target defrost mode; if the ambient temperature is less than the preset ambient temperature threshold, the low ambient temperature defrost mode is confirmed as the target defrost mode.

[0053] Specifically, if the frost layer thickness is greater than or equal to the preset thickness threshold, step 207 is executed to directly start defrosting. In this embodiment, the frost layer thickness triggering defrosting scheme has the highest priority to overcome the time delay problem of the temperature sensor. When the frost layer thickness does not trigger the defrost start, an appropriate defrost mode is further selected based on the ambient temperature to adapt to the defrosting requirements under different working conditions and heat pump states.

[0054] 203. Adjust a defrost triggering threshold for triggering defrosting in a target defrost mode according to the current second operating parameter set to obtain a target defrost triggering threshold.

[0055] It is understandable that when the heat pump system operates at a low ambient temperature, the ambient temperature is low and the frost layer forms relatively slowly, but as the ambient humidity increases, the frost layer may still accumulate rapidly. The low ambient temperature defrost mode of this embodiment can appropriately delay defrosting according to the ambient temperature and ambient humidity to save energy and improve the accuracy of defrost timing judgment in low ambient temperature operation scenarios; and when the heat pump system operates at a high ambient temperature, since the ambient temperature is greater than the ambient temperature threshold, even if the humidity is high, the accumulation rate of the frost layer is much slower than that in a low temperature environment, and can adapt to scenarios with large humidity changes.

[0056] In this embodiment, the second operating parameter set includes at least ambient humidity, and the second operating parameter set may also include ambient humidity and ambient temperature; the second operating parameter set may also be ambient humidity and compressor load.

[0057] Specifically, if the target defrost mode is a low ambient temperature defrost mode, the coil temperature threshold that triggers defrost is dynamically slip compensated according to the ambient humidity and ambient temperature, and the compensated coil temperature threshold is used as the target defrost trigger threshold; if the target defrost mode is a high ambient temperature defrost mode, the defrost score threshold corresponding to the target defrost gear is determined according to the ambient humidity, compressor load and multiple preset candidate defrost gears.

[0058] The present embodiment adopts different defrost trigger threshold adjustment methods for different defrost modes. The present embodiment adopts an adjustment method with higher adjustment accuracy in the low ambient temperature defrost mode, and adopts a simpler defrost mode in the high ambient temperature defrost mode. For example, at low ambient temperature, the defrost trigger threshold is accurately adjusted through a dynamic sliding mechanism, and at high ambient temperature, the defrost trigger threshold is quickly determined through multiple gears, so as to take into account the threshold adjustment requirements that are sensitive to ambient humidity under low ambient temperature, and the requirements for quickly determining the adjustment threshold in scenarios with high ambient temperature or large humidity changes.

[0059] 204. Determine a defrost trigger parameter based on a third operating parameter set corresponding to the target defrost mode.

[0060] In this embodiment, the current third operating parameter set is determined according to the target defrost mode. For example, the third operating parameter set in the low ambient temperature defrost mode may only include the coil temperature; the third operating parameter set in the high ambient temperature defrost mode may include multiple heat pump operating parameters, such as ambient temperature, coil temperature, frost layer thickness and compressor suction pressure.

[0061] In this embodiment, the defrost trigger parameter is a defrost demand calculation method corresponding to the target defrost mode, and the current defrost demand determined by the current third operating parameter set; the defrost demand calculation method for different defrost modes is different. For example, under low ambient temperature, the coil temperature of the outdoor heat exchanger in the heat pump system can intuitively reflect the frosting condition of its coil; under high ambient temperature, frosting is slower, and a comprehensive judgment can be made based on multiple variables to improve the accuracy of defrost judgment and reduce the false defrost rate.

[0062] Specifically, if the target defrost mode is a low ambient temperature defrost mode, the coil temperature is determined as the defrost trigger parameter; if the target defrost mode is a high ambient temperature defrost mode, the comprehensive defrost score is determined based on the heat pump operating parameters and parameter weights in the third operating parameter set.

[0063] 205. Determine whether the defrost trigger parameter is greater than or equal to the target defrost trigger threshold.

[0064] Specifically, if the target defrost mode is a low ambient temperature defrost mode, it is determined whether the coil temperature is greater than or equal to the target coil temperature threshold; if the target defrost mode is a high ambient temperature defrost mode, it is determined whether the comprehensive defrost score is greater than or equal to the defrost score threshold.

[0065] 206. If not, continue monitoring.

[0066] Specifically, if the current defrost trigger parameter is less than the target defrost trigger threshold, that is, the current defrost demand does not reach the target defrost trigger threshold, it is determined whether to switch the target defrost mode and / or adjust the defrost trigger threshold in the next defrost cycle; if so, defrost according to the updated target defrost mode and / or adjust the defrost trigger threshold. In this embodiment, continuous monitoring is performed by setting the defrost cycle, and the defrost mode and / or defrost trigger threshold are dynamically adjusted according to the working conditions and the changes in the heat pump state to adapt to complex working condition fluctuations.

[0067] 207. If yes, start defrosting.

[0068] Specifically, if the current defrost trigger parameter is greater than or equal to the target defrost trigger threshold, that is, the current defrost demand reaches the target defrost trigger threshold, the defrost is started and reset when the defrost exit condition is met.

[0069] The above-mentioned defrost exit condition may be that the defrost trigger parameter is less than the target coil temperature threshold and lasts for a certain period of time to avoid frequent defrosting. Other defrost exit conditions may also be set, without limitation.

[0070] In this embodiment, defrosting can be started directly according to the thickness of the frost layer, overcoming the time delay problem of the temperature sensor and achieving more intuitive defrost judgment. When the thickness defrost mode is not triggered, the target defrost mode is determined in the low ambient temperature defrost mode and the non-low ambient temperature defrost mode according to the ambient temperature, and different defrost trigger threshold adjustment methods are selected for different ambient temperatures. In the low ambient temperature defrost mode, an adjustment method with higher adjustment accuracy is adopted, and in the high ambient temperature defrost mode, a simpler defrost mode is adopted, so as to take into account the threshold adjustment requirements of environmental humidity sensitivity under low ambient temperature and quickly determine the adjustment threshold under high ambient temperature, save operating resources, and improve the defrost trigger threshold adjustment speed. The defrost trigger threshold is dynamically adjusted through the second operating parameter set to make the defrost trigger condition adaptable to different working conditions. This dynamic adjustment mechanism ensures that the defrost operation is performed at the best time, which not only avoids the increase in energy consumption caused by excessive defrosting, but also prevents the decrease in system efficiency caused by delayed defrosting, thereby achieving the dual goals of energy saving and efficient defrosting. Based on the third operating parameter set corresponding to the target defrost mode and the target defrost trigger threshold, the execution of the defrost operation is accurately controlled, which reduces the unnecessary fluctuation of the temperature controlled by the system due to the frequent activation of the system defrost, thereby improving the user's comfort. This effectively solves the deficiency of the traditional heat pump system that only sets a single defrost solution, and helps to extend the service life of the heat pump system. It achieves an effective balance between energy saving, efficient defrosting, user comfort and equipment life.

[0071] In actual applications, heat pump units operate at low ambient temperatures, and the possibility of frost formation is greatly increased. To ensure the efficient operation of the heat pump system, reliable defrosting technology is essential. Please refer to Figure 3, the third embodiment of the defrost control method in the present application includes:

[0072] 301. If the ambient temperature is lower than a preset ambient temperature threshold, the low ambient temperature defrost mode is determined as the target defrost mode.

[0073] In this embodiment, the first operating parameter set includes the ambient temperature. Specifically, when the ambient temperature T env_a Lower than the preset ambient temperature threshold T env_thres When the low ambient temperature defrost mode is set, the low ambient temperature defrost mode is determined as the target defrost mode.

[0074] It can be understood that the present embodiment mainly describes the operation scenario of the heat pump unit at a low ambient temperature, and the operation scenarios of the heat pump unit at a normal ambient temperature and a high ambient temperature can be set accordingly.

[0075] The first operating parameter set of this embodiment may include only the frost layer thickness and the ambient temperature. For example, if the ambient temperature is greater than or equal to the preset ambient temperature threshold, the non-low ambient temperature defrost mode is determined as the target defrost mode; wherein the ambient temperature threshold may include one or two or more to set candidate defrost modes corresponding to different ambient temperature intervals, and the non-low ambient temperature defrost mode may include one, two or more, without specific limitation.

[0076] 302. Determine an ambient temperature difference between an ambient temperature and an ambient temperature threshold.

[0077] Specifically, the currently collected ambient temperature T env_a and the ambient temperature threshold T env_thres Perform difference calculation to obtain the ambient temperature difference ΔT env .

[0078] 303. Perform dynamic slip compensation on the initial coil temperature threshold for triggering defrosting according to the ambient humidity and the ambient temperature difference to obtain a target coil temperature threshold.

[0079] It can be understood that under low ambient temperature, the coil temperature of the outdoor heat exchanger in the heat pump system can intuitively reflect the frosting condition of its coil. When the low ambient temperature defrost mode is the target defrost mode, the heat pump system determines the current defrost demand through the coil temperature, that is, the low ambient temperature defrost mode determines the coil temperature threshold as the defrost trigger parameter threshold.

[0080] It should be further explained that when the ambient temperature is low and the humidity is low, the frost layer forms relatively slowly. In this embodiment, the dynamic slip compensation under low ambient temperature, the coil temperature threshold decreases as the ambient temperature decreases, but if the ambient humidity is high, the frost layer may still accumulate quickly. Therefore, in a low temperature and low humidity environment, appropriately delaying defrosting can effectively save energy. In a low temperature and high humidity environment, the degree of delayed defrosting should be reduced to ensure that the system is defrosted in a timely manner.

[0081] Specifically, the target slip compensation coefficient is determined based on the ambient humidity and the preset temperature slip proportional factor; the product of the target slip compensation coefficient and the ambient temperature difference is determined as the threshold compensation value, and the difference between the initial coil temperature threshold and the threshold compensation value is determined as the target coil temperature threshold. The temperature slip proportional factor is used to indicate the ratio between the coil temperature threshold slip interval and the ambient temperature slip interval. The target slip compensation coefficient of this embodiment is an adjustment factor determined according to the ambient humidity and the temperature slip proportional factor. Figure 4 is an example of dynamic slip compensation. It can be seen that the coil temperature threshold decreases as the ambient temperature decreases at low ambient temperature, thereby achieving delayed defrosting. It should be further explained that dynamic slip compensation can be Figure 4 The straight line shown may also be a curve or other forms of presentation.

[0082] Among them, in the coil temperature threshold sliding range [T C_thres_min ,T C_thres_init ] and ambient temperature slip range [T env_thres2 ,T env_thres1 ] is the product of the humidity slip compensation factor and the temperature slip proportional factor, that is, the target slip compensation coefficient. The target slip compensation coefficient combines the ambient humidity and the currently allowed temperature slip range to accurately grasp the degree of delayed defrosting, avoid excessive delays that lead to decreased defrosting efficiency and increased energy consumption, and appropriately delay defrosting under low humidity conditions, thereby improving the accuracy of the coil temperature threshold and taking into account energy saving, efficient defrosting and user comfort.

[0083] The above temperature sliding proportional factor T SF =(T C_thres_init -T C_thres_min ) / (T env_thres1 -T env_thres2 ), the coil temperature threshold sliding interval is used to indicate the sliding interval of the coil temperature threshold allowed, and the ambient temperature sliding interval is used to indicate the sliding interval of the currently allowed ambient temperature, T env_thres1It can be set to the environmental threshold for determining whether to select the low ambient temperature defrost mode in step 301, that is, the threshold for judging whether the heat pump system is in a low ambient temperature operation state. The coil temperature threshold sliding range can be set according to actual conditions, and the coil temperature threshold is less than 0 degrees Celsius.

[0084] Optionally, determining a target slip compensation coefficient based on ambient humidity and a preset temperature slip proportional factor includes: determining a humidity slip compensation factor based on ambient humidity and a plurality of preset candidate humidity intervals; and determining the product of the humidity slip compensation factor and a preset temperature slip proportional factor as the target slip compensation coefficient.

[0085] Exemplarily, determining a humidity slip compensation factor based on ambient humidity and a plurality of preset candidate humidity intervals includes: determining a humidity slip compensation factor based on ambient humidity and a plurality of preset candidate humidity intervals; adjusting an initial coil temperature threshold for triggering defrost based on the humidity slip compensation factor, an ambient temperature difference, and a preset target threshold compensation relationship to obtain a target coil temperature threshold.

[0086] In this embodiment, under low ambient temperature, the initial coil temperature threshold that triggers defrosting is adaptively reduced as the ambient humidity increases and the ambient temperature decreases. This can be achieved by constructing a target threshold compensation relationship formula by mixing the humidity slip compensation factor and the ambient temperature difference with the initial coil temperature threshold.

[0087] In this embodiment, the target threshold compensation relationship is used to indicate the functional relationship between the coil temperature threshold and the ambient humidity under low ambient temperature and the ambient humidity. The functional relationship is determined and calibrated based on a large amount of experimental data. The target threshold compensation relationship can be a simple linear function, a polynomial function or a preset target threshold compensation relationship formula. It can also be represented by a complex machine learning-based model, which is not specifically limited in this embodiment.

[0088] Optionally, the above-mentioned determination of the humidity sliding compensation factor based on ambient humidity and multiple preset candidate humidity intervals includes: determining the target humidity range in multiple candidate humidity intervals according to the ambient humidity, and obtaining the adjustment coefficient corresponding to the target temperature range; determining the humidity compensation coefficient according to the relationship between the ambient humidity, the adjustment coefficient and the preset humidity sliding compensation factor.

[0089] In this embodiment, the humidity sliding compensation factor relationship is used to indicate the functional relationship between the humidity compensation coefficient and the ambient humidity. The functional relationship is determined and calibrated based on a large amount of experimental data. The humidity sliding compensation factor relationship can be a simple linear function, a polynomial function or a preset target threshold compensation relationship formula. It can also be represented by a complex machine learning-based model, which is not specifically limited in this embodiment.

[0090] Exemplarily, the humidity sliding compensation factor relationship is used to indicate the functional relationship between the humidity compensation coefficient, the adjustment coefficient and the ambient humidity, and is expressed as:

[0091] C comp =1-k*H env

[0092] Among them, C comp represents the humidity slip compensation factor, k represents the adjustment coefficient, H env Indicates the ambient humidity.

[0093] The adjustment coefficient k can be set in the range of 0.01 to 0.02 to adapt to the influence of different humidity conditions on the defrosting timing. For example, in a low humidity environment (ambient humidity is between 30% and 50%), k is set to 0.01. At this time, the ambient humidity is low and the influence of ambient humidity is small. At this time, the humidity slip compensation factor C comp ≈1, the slip compensation is mainly based on the ambient temperature difference; medium humidity environment (ambient humidity is 50% to 70%): k is set to 0.015, the slip is moderate, and the slip compensation is appropriately reduced to avoid excessive delay; high humidity environment (ambient humidity is 70% to 100%): k is set to 0.02, the ambient humidity has a greater impact, the frost layer accumulates faster, the slip compensation is minimized, and C comp The target temperature threshold after correction is kept closer to the initial temperature threshold after correction to avoid excessive frost accumulation due to excessive defrosting delay.

[0094] It is understandable that the humidity sliding compensation factor corresponding to each humidity interval can also be directly set to simplify the calculation. Optionally, the above-mentioned determination of the humidity sliding compensation factor based on the ambient humidity and the preset multiple candidate humidity intervals includes: determining the target humidity interval based on the ambient humidity in the preset multiple candidate humidity intervals, and obtaining the humidity sliding compensation factor corresponding to the target humidity interval. In this embodiment, the humidity sliding compensation factor is determined according to the current different humidity ranges to adjust the defrost trigger threshold so that the defrost timing is more in line with the actual frost layer conditions.

[0095] In this embodiment, the influence of ambient humidity is controlled by the humidity slip compensation factor, and the degree of temperature slip is controlled by the temperature slip proportional factor. The target slip compensation coefficient determined based on the humidity slip compensation factor and the temperature slip proportional factor can improve the accuracy of compensation of the coil temperature threshold by ambient temperature and ambient humidity.

[0096] Exemplarily, the target threshold compensation relationship formula is:

[0097] T C_thres_target =T C_thres_init -C comp *ΔT env *TSF

[0098] Among them, T C_thres_target represents the target coil temperature threshold, T C_thres_init represents the initial coil temperature threshold, C comp *ΔT env *T SF represents the threshold compensation value, where C comp represents the humidity slip compensation factor, ΔT env Indicates the ambient temperature difference, T SF Represents the temperature slip scaling factor.

[0099] It should be further explained that the above-mentioned division of humidity intervals, the value range of the adjustment coefficient k, the relationship between the humidity sliding compensation factor, and the target threshold compensation relationship formula are only possible examples and are not specifically limited.

[0100] Optionally, the high ambient temperature defrost mode can adjust the target defrost trigger threshold by referring to the dynamic slip compensation method in this embodiment, so as to improve the adjustment accuracy of the defrost trigger threshold. The defrost trigger threshold corresponding to the high ambient temperature defrost mode can be the coil temperature threshold or other trigger thresholds.

[0101] 304. Determine whether the coil temperature is greater than or equal to a target coil temperature threshold.

[0102] In this embodiment, the third operating parameter set determined by the low ambient temperature defrost mode includes the current coil temperature, that is, this embodiment determines whether there is a defrost demand based on the coil temperature and the target coil temperature threshold adjusted based on the dynamic compensation mechanism.

[0103] Specifically, the current coil temperature is collected by a coil temperature sensor disposed on the heat exchanger, and the current coil temperature is compared with a target coil temperature threshold.

[0104] 305. If not, continue monitoring.

[0105] If the current coil temperature is less than the target coil temperature threshold, continue monitoring, that is, return to step 304; if defrosting is not started within the preset defrost cycle, determine whether to switch the target defrost mode and / or adjust the defrost trigger threshold in the next defrost cycle, that is, return to step 301 or 303.

[0106] 306. If yes, start defrosting.

[0107] Specifically, if the current coil temperature is greater than or equal to the target coil temperature threshold, defrost is started and reset when the defrost exit condition is met. The defrost exit condition can be that the current coil temperature is less than the target coil temperature threshold for a certain period of time to avoid frequent defrost starts. Other defrost exit conditions can also be set, and there is no specific limitation.

[0108] In this embodiment, when the ambient temperature is lower than the ambient temperature threshold, the low ambient temperature defrost mode is used as the target defrost mode, and the dynamic slip compensation mechanism under low ambient temperature, the coil temperature threshold decreases as the ambient temperature decreases, and the degree of delayed defrosting is adjusted according to the ambient humidity to ensure that the degree of delayed defrosting is reduced when the ambient humidity is high, that is, the amplitude of reducing the coil trigger temperature threshold is small, ensuring that the system is defrosted in time and improving the defrosting efficiency. In the case of ambient humidity, the defrosting can be appropriately delayed to effectively save energy. The coil temperature threshold and the current coil temperature adjusted based on the dynamic slip compensation mechanism ensure that the defrosting operation is carried out at the best time, which not only avoids the increase in energy consumption caused by excessive defrosting, but also prevents the decrease in system efficiency caused by delayed defrosting, and achieves the dual goals of energy saving and efficient defrosting. The system frequently starts defrosting and reduces unnecessary fluctuations in the temperature controlled by the system, which improves the user's comfort. It effectively solves the shortcomings of the traditional heat pump system that only a single defrosting scheme is set, which helps to extend the service life of the heat pump system. An effective balance between energy saving, efficient defrosting, user comfort and equipment life is achieved.

[0109] In actual applications, the heat pump unit operates at normal ambient temperature or high ambient temperature, and its frosting speed is slow. When the ambient humidity is high, its frosting speed is still lower than that of the low ambient temperature operation scenario. In order to save computing resources and ensure the efficient operation of the heat pump system, please refer to Figure 5 , the fourth embodiment of the defrost control method in the present application includes:

[0110] 501. If the ambient temperature is greater than or equal to a preset ambient temperature threshold, determine a non-low ambient temperature defrost mode as a target defrost mode.

[0111] Optionally, the first operating parameter set may only include the ambient temperature. If the ambient temperature is greater than or equal to the preset ambient temperature threshold, the non-low ambient temperature defrost mode is determined as the target defrost mode. In this embodiment, only one non-low ambient temperature defrost mode can be set, such as only one ambient temperature threshold is set; only two or more non-low ambient temperature defrost modes can be set, that is, two or more ambient temperature thresholds are set to divide the ambient temperature interval.

[0112] Optionally, the first operating parameter set may include the ambient temperature and other related parameters. If the ambient temperature is greater than or equal to a preset ambient temperature threshold, the target defrost mode is determined in the non-low ambient temperature defrost mode according to other related parameters in the first operating parameter set. The non-low ambient temperature defrost mode may include two or more, without specific limitation.

[0113] 502. Adaptively switch the defrost gear according to the ambient humidity and the compressor load, and determine the defrost score threshold corresponding to the target defrost gear as the target defrost trigger threshold.

[0114] In this embodiment, the defrost gears include at least two, that is, two defrost gears, three or more defrost gears can be set, without specific limitation.

[0115] Three defrosting gears are exemplarily set: energy-saving gear, normal gear and strong gear, and the adjustment rules corresponding to each gear can be:

[0116] Energy saving gear: suitable for low humidity environment, increasing the defrost demand threshold, S thres_target =S thres_init +ΔS;

[0117] Normal gear: standard defrost demand, S thres_target =S thres_init ;

[0118] Strong gear: fast defrosting, lowering the defrosting requirement threshold S thres_target =S thres_init -ΔS;

[0119] Among them, S thres_target represents the target defrost score threshold, S thres_init represents the initial defrost score threshold, and ΔS represents the defrost score threshold compensation value.

[0120] In this embodiment, the second operating parameter set includes ambient humidity and compressor load. Specifically, the candidate defrost gear is matched according to the ambient humidity, and the target defrost gear is determined according to the compressor load and the candidate defrost gear; the defrost score threshold corresponding to the target defrost gear is determined as the target defrost trigger threshold.

[0121] For example, in a low humidity environment, that is, the ambient humidity H env Less than the low humidity threshold H env_thres_low , the energy-saving gear is prioritized as the target defrosting gear; in a high-humidity and high-load environment, at this time, the ambient humidity H env Greater than the high humidity threshold H env_thres_high , if the compressor load is large, switch to the strong gear as the target defrost gear.

[0122] The compressor load may be represented by the compressor suction pressure. When the compressor load is high, frosting may be accelerated. The compressor load may also be confirmed by other methods, which are not limited in this embodiment.

[0123] It is understandable that different defrost cycles can also be set for each defrost gear to ensure that energy consumption is minimized while meeting actual needs.

[0124] Optionally, under appropriate circumstances, the second operating parameter set may also include only ambient humidity, that is, matching the target defrost gear according to the ambient humidity and a plurality of preset defrost gears, and determining the defrost score threshold corresponding to the target defrost gear as the target defrost trigger threshold; each defrost gear corresponds to a humidity range.

[0125] 503. Determine the sum of the products of each heat pump operating parameter in the current third operating parameter set and the corresponding parameter weight to obtain a comprehensive defrost score.

[0126] In the present embodiment, the third operating parameter set determined by the non-low ambient temperature defrost mode includes multiple heat pump operating parameters such as ambient temperature, coil temperature, frost layer thickness and compressor suction pressure. That is, the present embodiment uses a multi-parameter comprehensive judgment of the system state to improve the accuracy of defrost judgment and reduce the false defrost rate.

[0127] The following is an example in which the third operating parameter set includes the ambient temperature, the coil temperature, the frost layer thickness and the suction pressure of the compressor. A corresponding parameter weight may be assigned to each parameter according to actual conditions.

[0128] It is understandable that in a low temperature environment, frost accumulates faster, so the ambient temperature T env The impact on defrost demand is greater, and the weight can be set to medium-high to ensure priority response at low temperatures; coil temperature T coil It can directly reflect the internal frost accumulation, which is of great reference value for defrosting demand and can be set with a higher weight; compressor suction pressure P suction Reflects the system load status. When the load is high, frost may be accelerated. The weight can be set to moderate. Frost thickness d frost It is a direct variable for judging the defrost demand, which can reflect the current degree of frost accumulation and can be given the highest weight.

[0129] For example, the ambient temperature W T_env The value range can be set to 0.25 to 0.30 to reflect the effect of temperature on frost formation; the coil temperature W T_coil The value range of can be set to 0.25 to 0.30 to reflect the internal frosting condition; the compressor suction pressure W pThe value range of can be set to 0.15 to 0.2. As a frosting auxiliary variable, the weight is slightly lower; the frost thickness W d The value range of can be set to 0.3 to 0.35, W d It is the variable that most directly reflects the frosting condition and can be given the highest weight. The sum of the weights of the above parameters is 1, that is, W T_coil +W T_env +W d +W p =1.

[0130] The comprehensive defrost score formula can be expressed as:

[0131] S=W T_coil *(T c_base -T coil )+W T_env *(T env_base -T env )+W d *d frost +W p *P suction

[0132] Wherein, S represents the comprehensive defrost score determined based on the current third operating parameter set; T c_base Indicates the reference coil temperature; T env_base Indicates the reference ambient temperature, T c_base , T env_base It can be set according to actual situation.

[0133] It can be understood that, in order to improve the comprehensive defrost scoring formula, each parameter in the comprehensive defrost scoring formula can be normalized first and then the sum of the products with the corresponding parameter weights can be calculated to avoid the error caused by the dimension. The above comprehensive defrost scoring formula is only a possible example.

[0134] 504. Determine whether the comprehensive defrost score is greater than or equal to a defrost score threshold.

[0135] Specifically, each sensor is set to collect the corresponding heat pump operating parameters, and the current comprehensive defrost score S is compared with the defrost score threshold S thres_target .

[0136] 505. If not, continue monitoring.

[0137] Specifically, if the current comprehensive defrost score is less than the defrost score threshold, that is, S<S thres_target , then continue monitoring, that is, return to step 504 and continue monitoring until the current defrost cycle ends;

[0138] Optionally, if defrosting is not started in any of the preset defrost cycles, it is determined whether to switch the target defrost mode and / or adjust the defrost trigger threshold in the next defrost cycle, that is, returning to step 501 or 503 .

[0139] 506. If yes, start defrosting.

[0140] If the comprehensive defrost score is greater than or equal to the defrost score threshold, that is, S ≥ S thres_target , then the defrost is started and reset when the defrost exit condition is met. The defrost exit condition can be that the comprehensive defrost score is less than the defrost score threshold and lasts for a certain period of time to avoid frequent defrost starts. Other defrost exit conditions can also be set, and there is no specific limitation.

[0141] In this embodiment, when the ambient temperature is greater than or equal to the ambient temperature threshold, the non-low ambient temperature defrost mode is determined as the target defrost mode to adapt to the heat pump system under normal ambient temperature conditions or high ambient temperature conditions and the corresponding heat pump state; it avoids the traditional scheme of setting the same defrost entry conditions for each condition, resulting in poor defrosting effect, affecting the normal operation of the heat pump system and bringing about problems such as increased energy consumption and reduced user comfort. Further, the defrost gear is adaptively switched by the ambient humidity and compressor load in the second operating parameter set, and the defrost score threshold corresponding to the target defrost gear is determined as the target defrost trigger threshold. The method of adjusting the target defrost trigger threshold has a small amount of calculation and a fast calculation speed, and can be adapted to humidity adaptation and load state adaptation in scenes with large humidity changes. This dynamic mode switching mechanism ensures that the defrost operation is performed at the best time, which not only avoids the increase in energy consumption caused by excessive defrosting, but also prevents the decrease in system efficiency caused by delayed defrosting, and achieves the dual goals of energy saving and efficient defrosting. In addition, the current third operating parameter set includes multiple heat pump operating parameters, and a comprehensive defrost score is obtained based on the sum of the products of each heat pump operating parameter and the corresponding parameter weight. The system state is judged by multiple parameters, the accuracy of defrost judgment is improved, and the false defrost rate is reduced. This not only reduces the unnecessary fluctuation of the temperature controlled by the system due to the frequent start of defrosting, but also improves the user's comfort. This embodiment effectively solves the deficiency of the traditional heat pump system that only sets a single defrost solution, helps to extend the service life of the heat pump system, and achieves an effective balance between energy saving, efficient defrosting, user comfort and equipment life.

[0142] The above describes the defrost control method in the present application. The following describes the defrost control device in the present application. Figure 6 , an embodiment of the defrost control device in the present application includes:

[0143] A mode determination module 601 is used to determine a target defrost mode according to a current first operating parameter set;

[0144] A threshold adjustment module 602 is used to adjust a defrost triggering threshold for triggering defrosting in a target defrost mode according to a current second operating parameter set to obtain a target defrost triggering threshold, wherein the current second operating parameter set at least includes ambient humidity;

[0145] The defrost control module 603 is used to perform defrost control according to a target defrost mode, a current third operating parameter set and a target defrost triggering threshold.

[0146] In this embodiment, the target defrost mode is determined according to the first operating parameter set, and the optimal defrost mode is adapted for various working conditions, so as to avoid the traditional scheme of setting the same defrost entry conditions for each working condition, resulting in poor defrosting effect, affecting the normal operation of the heat pump system, and bringing about problems such as increased energy consumption and reduced user comfort, thereby improving the adaptability of the defrost mode to different working conditions; further, the defrost trigger threshold is dynamically adjusted according to the second operating parameter set, so that the defrost trigger condition is adaptable to different working conditions. This dynamic adjustment mechanism ensures that the defrost operation is performed at the best time, which not only avoids the increase in energy consumption caused by excessive defrosting, but also prevents the decrease in system efficiency caused by delayed defrosting, and achieves the dual goals of energy saving and efficient defrosting. Based on the third operating parameter set and the target defrost trigger threshold corresponding to the target defrost mode, the execution of the defrost operation is accurately controlled, which reduces the unnecessary fluctuation of the temperature controlled by the system due to the frequent start of defrosting by the system and improves the user's comfort. The deficiency of the traditional heat pump system only setting a single defrost scheme is effectively solved, which helps to extend the service life of the heat pump system. An effective balance between energy saving, efficient defrosting, user comfort and equipment life is achieved.

[0147] See also Figure 7 , another embodiment of the defrost control device in the present application includes:

[0148] A mode determination module 601 is used to determine a target defrost mode according to a current first operating parameter set;

[0149] A threshold adjustment module 602 is used to adjust a defrost triggering threshold for triggering defrosting in a target defrost mode according to a current second operating parameter set to obtain a target defrost triggering threshold, wherein the current second operating parameter set at least includes ambient humidity;

[0150] The defrost control module 603 is used to perform defrost control according to a target defrost mode, a current third operating parameter set and a target defrost triggering threshold.

[0151] Optionally, the mode determination module 601 may be configured to directly start defrosting if the thickness of the frost layer exceeds a preset thickness threshold.

[0152] Optionally, the target defrost mode is a low ambient temperature defrost mode, and the second operating parameter set also includes the ambient temperature; the threshold adjustment module 602 includes a first threshold adjustment unit 6021, and the first threshold adjustment unit 6021 includes a determination subunit 60211, which is used to determine the ambient temperature difference between the ambient temperature and the ambient temperature threshold; the adjustment subunit 60212 is used to dynamically slip compensate the initial coil temperature threshold that triggers defrosting according to the ambient humidity and the ambient temperature difference, and obtain the target coil temperature threshold, and the target coil temperature threshold is less than the initial coil temperature threshold.

[0153] Optionally, the adjustment subunit 60212 is specifically used to determine the target slip compensation coefficient based on the ambient humidity and a preset temperature slip proportional factor;

[0154] The product of the target slip compensation coefficient and the ambient temperature difference is determined as the threshold compensation value, and the difference between the initial coil temperature threshold and the threshold compensation value is determined as the target coil temperature threshold. The temperature slip proportional factor is used to indicate the ratio between the coil temperature threshold slip interval and the ambient temperature slip interval.

[0155] Optionally, the adjustment subunit 60212 is specifically used to determine the humidity slip compensation factor based on the ambient humidity and a plurality of preset candidate humidity intervals;

[0156] The product of the humidity slip compensation factor and the preset temperature slip proportional factor is determined as the target slip compensation coefficient.

[0157] Optionally, the target defrost mode is a non-low ambient temperature defrost mode, and the current second operating parameter set also includes compressor load; the threshold adjustment module 602 includes a second threshold adjustment unit 6022, which is used to adaptively switch the defrost gear according to ambient humidity and compressor load, and determine the defrost score threshold corresponding to the target defrost gear as the target defrost trigger threshold.

[0158] Optionally, the defrost control module 603 includes a first control unit 6031 specifically configured to start defrosting if the coil temperature is greater than or equal to a target coil temperature threshold.

[0159] Optionally, the defrost control module 603 includes a second control unit 6032 specifically used to: determine the sum of the products of each heat pump operating parameter in the current third operating parameter set and the corresponding parameter weight to obtain a comprehensive defrost score;

[0160] If the comprehensive defrost score is greater than or equal to the defrost score threshold, defrost is initiated.

[0161] In this embodiment, defrosting can be started directly according to the thickness of the frost layer, overcoming the time delay problem of the temperature sensor and achieving more intuitive defrost judgment. When the thickness defrost mode is not triggered, the target defrost mode is determined in the low ambient temperature defrost mode and the non-low ambient temperature defrost mode according to the ambient temperature, and different defrost trigger threshold adjustment methods are selected for different ambient temperatures. In the low ambient temperature defrost mode, an adjustment method with higher adjustment accuracy is adopted, and in the high ambient temperature defrost mode, a simpler defrost mode is adopted, so as to take into account the threshold adjustment requirements of environmental humidity sensitivity under low ambient temperature and quickly determine the adjustment threshold under high ambient temperature, save operating resources, and improve the defrost trigger threshold adjustment speed. The defrost trigger threshold is dynamically adjusted through the second operating parameter set to make the defrost trigger condition adaptable to different working conditions. This dynamic adjustment mechanism ensures that the defrost operation is performed at the best time, which not only avoids the increase in energy consumption caused by excessive defrosting, but also prevents the decrease in system efficiency caused by delayed defrosting, thereby achieving the dual goals of energy saving and efficient defrosting. Based on the third operating parameter set corresponding to the target defrost mode and the target defrost trigger threshold, the execution of the defrost operation is accurately controlled, which reduces the unnecessary fluctuation of the temperature controlled by the system due to the frequent activation of the system defrost, thereby improving the user's comfort. This effectively solves the deficiency of the traditional heat pump system that only sets a single defrost solution, and helps to extend the service life of the heat pump system. It achieves an effective balance between energy saving, efficient defrosting, user comfort and equipment life.

[0162] above Figure 6 and Figure 7 The defrost control device in the present application is described in detail from the perspective of modular functional entities, and the defrost control device in the present application is described in detail from the perspective of hardware processing.

[0163] See also Figure 8 As shown, the defrost control device includes a processor 800 and a memory 801 . The memory 801 stores machine executable instructions that can be executed by the processor 800 . The processor 800 executes the machine executable instructions to implement the above-mentioned defrost control method.

[0164] Further, Figure 8 The defrost control device shown further includes a bus 802 and a communication interface 803 , and the processor 800 , the communication interface 803 and the memory 801 are connected via the bus 802 .

[0165] The memory 801 may include a high-speed random access memory (RAM), and may also include a non-volatile memory (non-volatile memory), for example, at least one disk storage. The communication connection between the system network element and at least one other network element is realized through at least one communication interface 803 (which may be wired or wireless), and the Internet, wide area network, local area network, metropolitan area network, etc. may be used. The bus 802 may be an ISA bus, a PCI bus, or an EISA bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 5 Only one bidirectional arrow is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0166] The processor 800 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit or software instructions in the processor 800. The above processor 800 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The disclosed methods, steps and logic block diagrams in the embodiments of the present disclosure can be implemented or executed. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor. The steps of the method disclosed in conjunction with the embodiments of the present disclosure can be directly embodied as a hardware decoding processor to be executed, or a combination of hardware and software modules in the decoding processor can be executed. The software module can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 801 , and the processor 800 reads the information in the memory 801 and completes the method steps of the above-mentioned embodiment in combination with its hardware.

[0167] The present application also provides a computer-readable storage medium, which may be a non-volatile computer-readable storage medium or a volatile computer-readable storage medium. Instructions are stored in the computer-readable storage medium, and when the instructions are executed on a computer, the computer executes the steps of the defrost control method.

[0168] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0169] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, etc., and other media that can store program codes.

[0170] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A defrosting control method, characterized in that: The defrost control method comprises: Determine a target defrost mode according to a current first operating parameter set, wherein the first operating parameter set is used to indicate a heat pump operating parameter set associated with determining the target defrost mode; adjusting a defrost triggering threshold for triggering defrosting in the target defrost mode according to a current second operating parameter set to obtain a target defrost triggering threshold, wherein the second operating parameter set is used to indicate a heat pump operating parameter set associated with adjusting the defrost triggering threshold in the target defrost mode, and the second operating parameter set at least includes ambient humidity; The heat pump is controlled to perform defrosting according to the target defrost mode, the current third operating parameter set and the target defrost trigger threshold, wherein the third operating parameter set is used to indicate a heat pump operating parameter set associated with confirming a defrost demand under the target defrost mode.

2. The defrosting control method according to claim 1, characterized in that: The target defrost mode is a low ambient temperature defrost mode, and the second operating parameter set further includes the ambient temperature; The step of adjusting the defrost triggering threshold for triggering defrosting in the target defrost mode according to the current second operating parameter set to obtain the target defrost triggering threshold comprises: Determining an ambient temperature difference between the ambient temperature and the ambient temperature threshold; The initial coil temperature threshold triggering defrosting is dynamically slip compensated according to the ambient humidity and the ambient temperature difference to obtain a target coil temperature threshold, which is smaller than the target coil temperature threshold.

3. The defrosting control method according to claim 2, characterized in that: The step of dynamically performing slip compensation on the initial coil temperature threshold for triggering defrosting according to the ambient humidity and the ambient temperature difference to obtain the target coil temperature threshold comprises: determining a target slip compensation coefficient based on the ambient humidity and a preset temperature slip proportional factor; The product of the target slip compensation coefficient and the ambient temperature difference is determined as the threshold compensation value, and the difference between the initial coil temperature threshold and the threshold compensation value is determined as the target coil temperature threshold. The temperature slip proportional factor is used to indicate the ratio between the coil temperature threshold slip interval and the ambient temperature slip interval.

4. The defrosting control method according to claim 3, characterized in that: The determining of the target slip compensation coefficient based on the ambient humidity and a preset temperature slip proportional factor includes: Determining a humidity slip compensation factor based on the ambient humidity and a plurality of preset candidate humidity intervals; The product of the humidity slip compensation factor and the preset temperature slip proportional factor is determined as the target slip compensation coefficient.

5. The defrosting control method according to claim 1, characterized in that: The target defrost mode is a non-low ambient temperature defrost mode, and the second operating parameter set further includes a compressor load; The step of adjusting the defrost triggering threshold for triggering defrosting in the target defrost mode according to the current second operating parameter set to obtain the target defrost triggering threshold comprises: The defrost gear is adaptively switched according to the ambient humidity and the compressor load, and a defrost score threshold corresponding to the target defrost gear is determined as a target defrost trigger threshold.

6. The defrosting control method according to claim 5, characterized in that: The third operating parameter set includes a plurality of heat pump operating parameters; The controlling the heat pump to perform defrosting according to the target defrost mode, the current third operating parameter set and the target defrost trigger threshold comprises: Determine the sum of the products of each heat pump operating parameter in the current third operating parameter set and the corresponding parameter weight to obtain a comprehensive defrost score; If the comprehensive defrost score is greater than or equal to the defrost score threshold, defrosting is initiated.

7. The defrosting control method according to claim 1, characterized in that: Before determining the target defrost mode according to the current first operating parameter set, the method further includes: If the thickness of the frost layer exceeds a preset thickness threshold, defrosting is directly started.

8. A defrost control device, characterized in that: The defrost control device comprises: A mode determination module, configured to determine a target defrost mode according to a current first operating parameter set, wherein the first operating parameter set is used to indicate a heat pump operating parameter set associated with determining the target defrost mode; a threshold adjustment module, configured to adjust a defrost triggering threshold for triggering defrosting in the target defrost mode according to a current second operating parameter set to obtain a target defrost triggering threshold, wherein the second operating parameter set is used to indicate a heat pump operating parameter set associated with adjusting the defrost triggering threshold in the target defrost mode, wherein the second operating parameter set at least includes ambient humidity; A defrost control module is used to control the heat pump to defrost according to the target defrost mode, the current third operating parameter set and the target defrost trigger threshold, wherein the third operating parameter set is used to indicate the heat pump operating parameter set associated with confirming the defrost demand under the target defrost mode.

9. A defrost control device, characterized in that: The defrost control device comprises: a memory and at least one processor, wherein instructions are stored in the memory; The at least one processor calls the instructions in the memory to enable the defrost control device to perform the defrost control method according to any one of claims 1 to 7.

10. A computer-readable storage medium having instructions stored thereon, characterized in that: When the instructions are read and executed, the defrost control method according to any one of claims 1 to 7 is executed.

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