Frost suppression heat pump unit, frost suppression control method, device, equipment and storage medium

Abstract

This application discloses a defrosting heat pump unit, a defrosting control method, device, equipment, and storage medium. The defrosting heat pump unit includes: a compressor, a shell-and-tube heat exchanger, a finned heat exchanger, a heat source heat exchanger, a gas-liquid separator, a first throttling valve, a second throttling valve, a first flow path control valve, a second flow path control valve, a third flow path control valve, and a controller. In the heating cycle path, the compressor, the shell-and-tube heat exchanger, the first throttling valve, the finned heat exchanger, the second flow path control valve, and the gas-liquid separator are connected in sequence. In the defrosting cycle path, the compressor, the shell-and-tube heat exchanger, the first flow path control valve, the finned heat exchanger, the second throttling valve, the heat source heat exchanger, the third flow path control valve, and the gas-liquid separator are connected in sequence. The controller is communicatively connected to the first throttling valve, the second throttling valve, the first flow path control valve, the second flow path control valve, and the third flow path control valve.

Description

Technical Field

[0001] This application relates to the field of heat pump control technology, and in particular to a defrosting heat pump unit, defrosting control method, device, equipment and storage medium. Background Technology

[0002] Currently, air source heat pumps commonly use four-way reversing valves as the core component for system function switching to meet the switching needs of various operating modes such as cooling, heating, and defrosting. From a thermodynamic perspective, the conventional defrosting process generally achieves refrigeration cycle operation through the reversal of the four-way valve. In winter heating conditions, the outdoor finned heat exchanger acts as an evaporator, and its surface temperature is often lower than the dew point temperature or even the freezing point of the ambient air, making it extremely prone to frost formation, which leads to a sharp drop in heat exchange efficiency. To maintain the performance of the heat pump unit, the defrosting program must be initiated periodically. At this time, the four-way reversing valve switches to the refrigeration cycle, and the high-temperature refrigerant flows to the outdoor finned heat exchanger for defrosting, while the indoor heat exchanger becomes an evaporator, absorbing heat from heated water or air. This process directly leads to an interruption of heating on the user side, resulting in significant fluctuations in water or room temperature, affecting heating comfort and system energy efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a defrosting heat pump unit, a defrosting control method, a device, equipment, and a storage medium, which can solve the above-mentioned problems existing in the prior art.

[0004] To achieve the above objectives, this application adopts the following technical solution:

[0005] In the first aspect, a defrosting heat pump unit is provided, comprising: a compressor, a shell-and-tube heat exchanger, a finned heat exchanger, a heat source heat exchanger, a gas-liquid separator, a first throttling valve, a second throttling valve, a first flow path control valve, a second flow path control valve, a third flow path control valve, and a controller; The compressor's exhaust port is connected to the inlet of the shell-and-tube heat exchanger; in the heating cycle path, the outlet of the shell-and-tube heat exchanger is connected to the inlet of the finned heat exchanger through the first throttling valve; in the defrosting cycle path, the outlet of the shell-and-tube heat exchanger is connected to the inlet of the finned heat exchanger through the first flow path control valve; in the heating cycle path, the outlet of the finned heat exchanger is connected to the inlet of the gas-liquid separator through the second flow path control valve; in the defrosting cycle path, the outlet of the finned heat exchanger is connected to the inlet of the heat source heat exchanger through the second throttling valve, and the outlet of the heat source heat exchanger is connected to the inlet of the gas-liquid separator through the third flow path control valve; the outlet of the gas-liquid separator is connected to the compressor's suction port. The controller is communicatively connected to the first throttle valve, the second throttle valve, the first flow path control valve, the second flow path control valve, and the third flow path control valve.

[0006] Preferably, the first flow path control valve, the second flow path control valve, and the third flow path control valve are all two-way valves.

[0007] Secondly, a method for controlling frost suppression is provided, including: Obtain the operating parameter set and preset parameter set of the defrosting heat pump unit; wherein, the operating parameter set includes: motor operating power, ambient humidity, continuous heating operation time, and the attenuation rate of current operating energy consumption compared to initial operating energy consumption; the preset parameter set includes: motor power growth rate threshold, ambient humidity baseline value, defrosting operation time threshold, energy consumption attenuation rate baseline value, and baseline power in frost-free state; Based on the set of operating parameters and the set of preset parameters, determine the relative power growth coefficient, relative ambient humidity coefficient, relative operating time coefficient, and relative energy consumption attenuation coefficient; The defrosting cycle index is determined based on the relative power growth coefficient, relative ambient humidity coefficient, relative operating time coefficient, and relative energy consumption attenuation coefficient. Compare the anti-frost cycle index with the preset anti-frost activation threshold; When the anti-frost cycle index is greater than the preset anti-frost activation threshold, the anti-frost cycle is activated.

[0008] Preferably, determining the relative power growth coefficient, relative ambient humidity coefficient, relative operating time coefficient, and relative energy consumption attenuation coefficient based on the operating parameter set and the preset parameter set includes: The motor power growth rate is determined based on the growth rate of the motor operating power relative to the baseline power in the frost-free state, and the relative power growth coefficient is determined based on the ratio of the motor power growth rate to the motor power growth rate threshold. The relative humidity coefficient is determined based on the ratio of the ambient humidity to the ambient humidity reference value. The relative operating time coefficient is determined based on the ratio of the continuous heating operation time to the defrosting operation time threshold. The relative energy consumption attenuation coefficient is determined by the ratio of the attenuation rate of the current operating energy consumption to the initial operating energy consumption to the baseline value of the energy consumption attenuation rate.

[0009] Preferably, the step of determining the motor power growth rate based on the growth rate of the motor operating power relative to the reference power in the frost-free state is configured as the ratio of the difference between the motor operating power and the reference power in the frost-free state to the reference power in the frost-free state.

[0010] Preferably, determining the defrosting cycle index based on the relative power growth coefficient, relative ambient humidity coefficient, relative operating time coefficient, and relative energy consumption attenuation coefficient includes: The relative power growth coefficient is weighted according to the preset power growth rate weight to obtain the weighted relative power growth coefficient. The relative humidity coefficient is weighted according to a preset environmental humidity weight to obtain a weighted relative humidity coefficient. The relative running time coefficient is weighted according to a preset running time weight to obtain the weighted relative running time coefficient. The relative energy consumption attenuation coefficient is weighted according to a preset energy consumption attenuation weight to obtain the weighted relative energy consumption attenuation coefficient. The weighted relative power growth coefficient, the weighted relative ambient humidity coefficient, the weighted relative operating time coefficient, and the weighted relative energy consumption decay coefficient are summed to obtain the frost suppression cycle index; wherein the sum of the preset power growth rate weight, the preset ambient humidity weight, the preset operating time weight, and the preset energy consumption decay weight is 1.

[0011] Preferably, the preset power growth rate weight is greater than any one of the preset ambient humidity weight, the preset operating time weight, and the preset energy consumption attenuation weight.

[0012] Thirdly, a defrosting control device is provided, comprising: The parameter acquisition module is used to acquire the operating parameter set and preset parameter set of the defrosting heat pump unit; wherein, the operating parameter set includes: motor operating power, ambient humidity, continuous heating operation time, and the attenuation rate of current operating energy consumption compared with the initial operating energy consumption; the preset parameter set includes: motor power growth rate threshold, ambient humidity baseline value, defrosting operation time threshold, energy consumption attenuation rate baseline value, and baseline power in frost-free state; The first processing module is used to determine the relative power growth coefficient, relative ambient humidity coefficient, relative operating time coefficient, and relative energy consumption attenuation coefficient based on the operating parameter set and the preset parameter set. The second processing module is used to determine the defrosting cycle index based on the relative power growth coefficient, relative ambient humidity coefficient, relative operating time coefficient, and relative energy consumption attenuation coefficient. The judgment module is used to compare the anti-frost cycle index with the preset anti-frost activation threshold. The execution module is used to start the anti-frost cycle when the anti-frost cycle index is greater than the preset anti-frost start threshold.

[0013] Fourthly, a heat pump unit control device is provided, comprising: a memory and one or more processors; the memory is used to store one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the anti-frost control method as described above.

[0014] Fifthly, a storage medium is provided for storing computer-executable instructions, which, when executed by a processor, are used to perform the defrosting control method described above.

[0015] The beneficial effects of this application are as follows: This application provides an independent defrosting circulation path, which allows the refrigerant to defrost the outdoor finned heat exchanger separately through this path when defrosting is started, without having to switch the main cycle operating mode through a four-way reversing valve. This enables continuous heating without having to switch the system to a refrigeration cycle for the defrosting process, thus avoiding reverse heat absorption from the heated medium for defrosting and resulting in energy waste.

[0016] This application, by determining the defrost cycle index, can more accurately characterize the actual frost state and the degree of system performance degradation, thereby accurately grasping the actual start of defrost suppression, avoiding unnecessary frequent defrost suppression or passive defrosting after severe performance degradation, and optimizing the energy consumption of the defrost suppression process while maximizing the maintenance of heating continuity and stability. Attached Figure Description

[0017] The present application will now be described in further detail with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the structure of the defrosting heat pump unit under heating cycle according to an embodiment of this application; Figure 2 This is a schematic diagram of the defrosting heat pump unit under defrosting cycle according to an embodiment of this application; Figure 3 A schematic flowchart illustrating the anti-frost control method provided in this application embodiment; Figure 4 This is a schematic diagram of the structure of the anti-frost control device provided in the embodiments of this application; Figure 5 A schematic diagram of the structure of the heat pump unit control equipment provided in the embodiments of this application.

[0019] In the picture: 101. Compressor; 102. Shell-and-tube heat exchanger; 103. Finned heat exchanger; 104. Heat source heat exchanger; 105. Gas-liquid separator; 106. First throttle valve; 107. Second throttle valve; 108. First flow path control valve; 109. Second flow path control valve; 110. Third flow path control valve; 401. Parameter Acquisition Module; 402. First Processing Module; 403. Second Processing Module; 404. Judgment Module; 405. Execution Module; 501. Processor; 502. Memory; 503. Input device; 504. Output device; 505. Communication device. Detailed Implementation

[0020] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] Figure 1 This is a schematic diagram of the defrosting heat pump unit under heating cycle according to an embodiment of this application. Figure 2 This is a schematic diagram of the defrosting heat pump unit under defrosting cycle according to an embodiment of this application, as shown below. Figure 1 and Figure 2 As shown, this embodiment provides a defrosting heat pump unit, including: a compressor 101, a shell-and-tube heat exchanger 102, a finned heat exchanger 103, a heat source heat exchanger 104, a gas-liquid separator 105, a first throttle valve 106, a second throttle valve 107, a first flow path control valve 108, a second flow path control valve 109, a third flow path control valve 110, and a controller; The exhaust port of the compressor 101 is connected to the inlet of the shell-and-tube heat exchanger 102; in the heating cycle path, the outlet of the shell-and-tube heat exchanger 102 is connected to the inlet of the finned heat exchanger 103 through the first throttle valve 106; in the defrosting cycle path, the outlet of the shell-and-tube heat exchanger 102 is connected to the inlet of the finned heat exchanger 103 through the first flow path control valve 108; in the heating cycle path, the outlet of the finned heat exchanger 103 is connected to the inlet of the gas-liquid separator 105 through the second flow path control valve 109; in the defrosting cycle path, the outlet of the finned heat exchanger 103 is connected to the inlet of the heat source heat exchanger 104 through the second throttle valve 107, and the outlet of the heat source heat exchanger 104 is connected to the inlet of the gas-liquid separator 105 through the third flow path control valve 110; the outlet of the gas-liquid separator 105 is connected to the suction port of the compressor 101. The controller is communicatively connected to the first throttle valve 106, the second throttle valve 107, the first flow path control valve 108, the second flow path control valve 109, and the third flow path control valve 110.

[0024] During the heating cycle, the high-temperature, high-pressure refrigerant gas discharged from the compressor 101 first enters the shell-and-tube heat exchanger 102, where it exchanges heat with the circulating water on the user side, releasing condensation heat to achieve continuous and stable heating to the user side. Subsequently, the refrigerant flows through the first throttling valve 106 for pressure reduction and flow throttling, transforming into a low-temperature, low-pressure gas-liquid two-phase state before entering the finned heat exchanger 103. At this time, the finned heat exchanger 103 absorbs heat from the environment, and the refrigerant evaporates into gas. Finally, the refrigerant vapor enters the gas-liquid separator 105 through the second flow path control valve 109, and the separated gas is drawn into the compressor 101, completing the entire heating cycle.

[0025] When it is determined that a defrosting cycle needs to be initiated, the controller opens the first flow path control valve 108 and closes the first throttling valve 106, allowing the high-temperature refrigerant flowing from the shell-and-tube heat exchanger 102 to flow directly to the finned heat exchanger 103 via the first flow path control valve 108 without throttling. The high-temperature refrigerant entering the finned heat exchanger 103 can directly heat the fin surface, achieving rapid and efficient defrosting. The defrosted refrigerant then flows through the second throttling valve 107 for appropriate throttling and pressure reduction, and then enters the specially designed heat source heat exchanger 104. The heat source heat exchanger 104 can absorb heat from the environment to ensure complete refrigerant evaporation. Finally, the refrigerant vapor enters the gas-liquid separator 105 through the third flow path control valve 110 and returns to the compressor 101, completing the defrosting cycle. In this embodiment, the defrosting cycle is a parallel path independent of the heating cycle. When defrosting is started, the refrigerant can defrost the outdoor finned heat exchanger through this path alone, without having to switch the main cycle's operating mode through the four-way reversing valve. This can achieve continuous heating without having to switch the system to a cooling cycle for the defrosting process, thus avoiding reverse heat absorption from the heated medium for defrosting and resulting in energy waste.

[0026] In one embodiment, the first flow path control valve 108, the second flow path control valve 109, and the third flow path control valve 110 are all two-way valves. In this embodiment, the use of two-way valves can simplify the pipeline layout and facilitate precise control of the refrigerant flow direction.

[0027] Figure 3 This is a schematic flowchart of the anti-frost control method provided in the embodiments of this application, as shown below. Figure 3 As shown, this embodiment provides a method for controlling frost suppression, including: S301. Obtain the operating parameter set and preset parameter set of the defrosting heat pump unit; wherein, the operating parameter set includes: motor operating power, ambient humidity, continuous heating operation time and the attenuation rate of current operating energy consumption compared with the initial operating energy consumption; the preset parameter set includes: motor power growth rate threshold, ambient humidity baseline value, defrosting operation time threshold, energy consumption attenuation rate baseline value, and baseline power in frost-free state.

[0028] S302. Based on the operating parameter set and the preset parameter set, determine the relative power growth coefficient, relative ambient humidity coefficient, relative operating time coefficient, and relative energy consumption attenuation coefficient. Further, S302 includes: S3021. Determine the motor power growth rate based on the growth rate of the motor operating power relative to the reference power in the frost-free state, and determine the relative power growth coefficient based on the ratio of the motor power growth rate to the motor power growth rate threshold.

[0029] In one embodiment, the step of determining the motor power growth rate in S3021 based on the growth rate of the motor operating power relative to the reference power in the frost-free state is configured as the ratio of the difference between the motor operating power and the reference power in the frost-free state to the reference power in the frost-free state.

[0030] Specifically, the motor power growth rate ΔP is: ΔP=(P Pbase) / Pbase×100%; Where P is the motor operating power; Pbase is the base power in frost-free conditions.

[0031] S3022. Determine the relative humidity coefficient based on the ratio of the ambient humidity to the ambient humidity reference value.

[0032] S3023. Determine the relative operating time coefficient based on the ratio of the continuous heating operation time to the defrosting operation time threshold.

[0033] S3024. Determine the relative energy consumption attenuation coefficient based on the ratio of the attenuation rate of the current operating energy consumption to the initial operating energy consumption to the benchmark value of the energy consumption attenuation rate.

[0034] S303. Determine the defrosting cycle index based on the relative power growth coefficient, relative ambient humidity coefficient, relative operating time coefficient, and relative energy consumption decay coefficient. Specifically, S303 includes: S3031. The relative power growth coefficient is weighted according to the preset power growth rate weight to obtain the weighted relative power growth coefficient.

[0035] S3032. The relative humidity coefficient is weighted according to the preset environmental humidity weight to obtain the weighted relative humidity coefficient.

[0036] S3033. The relative running time coefficient is weighted according to the preset running time weight to obtain the weighted relative running time coefficient.

[0037] S3034. The relative energy consumption attenuation coefficient is weighted according to the preset energy consumption attenuation weight to obtain the weighted relative energy consumption attenuation coefficient.

[0038] S3035. The weighted relative power growth coefficient, the weighted relative ambient humidity coefficient, the weighted relative operating time coefficient, and the weighted relative energy consumption decay coefficient are summed to obtain the defrosting cycle index; wherein the sum of the preset power growth rate weight, the preset ambient humidity weight, the preset operating time weight, and the preset energy consumption decay weight is 1. It should be noted that the preset power growth rate weight is greater than any one of the preset ambient humidity weight, the preset operating time weight, and the preset energy consumption decay weight.

[0039] In one specific embodiment, the anti-frost cycle index is: FI=α×(ΔP / ΔPth)+β×(H / Hbase)+γ×(t / tcycle)+δ×(ΔCOP / ΔCOPbase); Wherein, ΔP is the motor power growth rate; ΔPth is the motor power growth rate threshold; H is the ambient humidity; Hbase is the ambient humidity baseline value; t is the continuous heating operation time; tcycle is the defrost operation time threshold; ΔCOP is the energy consumption attenuation rate of the current operation compared to the initial operation energy consumption; ΔCOPbase is the energy consumption attenuation rate baseline value; α is the preset power growth rate weight; β is the preset ambient humidity weight; γ is the preset operation time weight; δ is the preset energy consumption attenuation weight; here α+β+γ+δ=1. In this embodiment, by adjusting the preset power growth rate weight α, the preset ambient humidity weight β, the preset operation time weight γ, and the preset energy consumption attenuation weight δ, the contribution of different influencing factors in the decision-making is ensured. Generally, the preset power growth rate weight α, which directly reflects the load change, is given the highest weight.

[0040] In one embodiment, the operating parameter set and preset parameter set of the defrosting heat pump unit are obtained. In the preset parameter set, the motor power growth rate threshold ΔPth is set to 15%, the ambient humidity baseline value Hbase is set to 60%, the defrosting operation time threshold tcycle is set to 60 min, the energy consumption attenuation rate baseline value ΔCOPbase is set to 20%, and the baseline power Pbase in the frost-free state is set to 0.15 kW. During operation, the motor operating power P, ambient humidity H (80%), continuous heating operation time t (45 min), and the attenuation rate ΔCOP of the current operating energy consumption compared to the initial operating energy consumption are collected (10%). Based on the growth rate of the motor operating power P relative to the baseline power Pbase in the frost-free state, the motor power growth rate ΔP is determined to be 12%. In this embodiment, the preset power growth rate weight α is set to 0.45, the preset ambient humidity weight β is set to 0.25, the preset operation time weight γ is set to 0.15, and the preset energy consumption attenuation weight δ is set to 0.15, at which point α+β+γ+δ=1. Based on the above parameters, the defrosting cycle index FI is determined to be 0.8805.

[0041] S304. Compare the anti-frost cycle index with the preset anti-frost activation threshold.

[0042] S305. When the defrosting cycle index is greater than the preset defrosting start threshold, it indicates that frost has significantly affected the working efficiency and stability of the defrosting heat pump unit, and the defrosting cycle needs to be started.

[0043] In one embodiment, the preset defrost activation threshold is set to 0.8. The defrost cycle index FI, determined earlier, is 0.8805, which is compared with the preset defrost activation threshold. At this time, the defrost cycle index FI is greater than the preset defrost activation threshold, indicating that frost formation has a significant impact on the working efficiency and stability of the defrost heat pump unit, and the defrost cycle needs to be activated.

[0044] In this embodiment, by integrating four-dimensional information of power, humidity, time and energy efficiency for comprehensive control, the defrosting action can be triggered in time when the frost layer just begins to affect the performance of the defrosting heat pump unit, but before it causes a serious decrease in efficiency or operational risks. This avoids unnecessary frequent defrosting or passive defrosting after a serious decrease in performance, and optimizes the energy consumption of the defrosting process while maintaining the continuity and stability of heating to the maximum extent.

[0045] Figure 4 This is a schematic diagram of the structure of the anti-frost control device provided in the embodiments of this application, as shown below. Figure 4 As shown, this embodiment provides a defrosting control device, including: a parameter acquisition module 401, a first processing module 402, a second processing module 403, a judgment module 404, and an execution module 405. The parameter acquisition module 401 is used to acquire a set of operating parameters and a preset parameter set for the defrosting heat pump unit; wherein, the operating parameter set includes: motor operating power, ambient humidity, continuous heating operating time, and the attenuation rate of current operating energy consumption compared to initial operating energy consumption; the preset parameter set includes: a motor power growth rate threshold, an ambient humidity baseline value, a defrosting operating time threshold, an energy consumption attenuation rate baseline value, and a baseline power in a frost-free state. The first processing module 402 is used to determine the relative power growth coefficient, relative ambient humidity coefficient, relative operating time coefficient, and relative energy consumption attenuation coefficient based on the operating parameter set and the preset parameter set. The second processing module 403 is used to determine the defrosting cycle index based on the relative power growth coefficient, relative ambient humidity coefficient, relative operating time coefficient, and relative energy consumption attenuation coefficient. The judgment module 404 is used to compare the defrosting cycle index with a preset defrosting start threshold. The execution module 405 is used to start the anti-frost cycle when the anti-frost cycle index is greater than the preset anti-frost start threshold.

[0046] Figure 5 This is a schematic diagram of the structure of the heat pump unit control equipment provided in the embodiments of this application, as shown below. Figure 5As shown, this embodiment provides a heat pump unit control device, including a processor 501 and a memory 502. In one possible product form of the heat pump unit control device, it may also include an input device 503, an output device 504, and a communication device 505. The number of processors 501 in the heat pump unit control device can be one or more. Figure 4 Taking a processor 501 as an example; the processor 501, memory 502, input device 503, output device 504, and communication device 505 in the heat pump unit control equipment can be connected via bus or other means. Figure 4 Taking the example of a connection between China and Israel via a bus.

[0047] The memory 502, as a computer-readable storage medium, can be used to store software programs, computer-executable programs, and modules, such as the program instructions / modules corresponding to the display device networking method in this embodiment. The processor 501 executes various functional applications and data processing of the heat pump unit control equipment by running the software programs, instructions, and modules stored in the memory 502, thereby realizing the above-mentioned defrosting control method.

[0048] Memory 502 may primarily include a program storage area and a data storage area. The program storage area may store the operating system and at least one application program required for a given function; the data storage area may store data created based on the use of the electronic device. Furthermore, memory 502 may include high-speed random access memory and non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device. In some instances, memory 502 may further include memory remotely located relative to processor 501, which can be connected to the electronic device via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0049] Input device 503 can be used to receive network configuration information. Output device 504 may include electronic devices such as a display screen.

[0050] The aforementioned electronic equipment can be used to execute any heat pump compressor defrosting control method, possessing the corresponding functions and beneficial effects.

[0051] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the above-described apparatus and equipment can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0052] Furthermore, embodiments of this application also provide a storage medium for storing computer-executable instructions. When executed by a processor, the computer-executable instructions are used to perform relevant operations in the anti-frost control method provided in any embodiment of this application, and have corresponding functions and beneficial effects.

[0053] Those skilled in the art will understand that embodiments of this application may be provided as methods, systems, or computer program products.

[0054] Therefore, this application may take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code. This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, produce implementations of the flowchart... Figure 1 One or more processes and / or boxes Figure 1 The computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The functions specified in one or more boxes. These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable apparatus for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0055] In a typical configuration, a computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory. Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0056] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0057] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0058] The above specific embodiments have further detailed the purpose, technical solution, and beneficial effects of this application. It should be understood that the above are merely specific embodiments of this application and are not intended to limit the scope of protection of this application. In particular, it should be noted that any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application for those skilled in the art.

Claims

1. A defrosting heat pump unit, characterized in that, include: Compressor, shell and tube heat exchanger, finned heat exchanger, heat source heat exchanger, gas-liquid separator, first throttle valve, second throttle valve, first flow path control valve, second flow path control valve, third flow path control valve and controller; The compressor's exhaust port is connected to the inlet of the shell-and-tube heat exchanger; in the heating cycle path, the outlet of the shell-and-tube heat exchanger is connected to the inlet of the finned heat exchanger through the first throttling valve; in the defrosting cycle path, the outlet of the shell-and-tube heat exchanger is connected to the inlet of the finned heat exchanger through the first flow path control valve; in the heating cycle path, the outlet of the finned heat exchanger is connected to the inlet of the gas-liquid separator through the second flow path control valve; in the defrosting cycle path, the outlet of the finned heat exchanger is connected to the inlet of the heat source heat exchanger through the second throttling valve, and the outlet of the heat source heat exchanger is connected to the inlet of the gas-liquid separator through the third flow path control valve; the outlet of the gas-liquid separator is connected to the compressor's suction port. The controller is communicatively connected to the first throttle valve, the second throttle valve, the first flow path control valve, the second flow path control valve, and the third flow path control valve.

2. The defrosting heat pump unit according to claim 1, characterized in that, The first flow path control valve, the second flow path control valve, and the third flow path control valve are all two-way valves.

3. A method for controlling frost suppression, characterized in that, include: Obtain the operating parameter set and preset parameter set of the defrosting heat pump unit; wherein, the operating parameter set includes: motor operating power, ambient humidity, continuous heating operation time, and the attenuation rate of current operating energy consumption compared to initial operating energy consumption; the preset parameter set includes: motor power growth rate threshold, ambient humidity baseline value, defrosting operation time threshold, energy consumption attenuation rate baseline value, and baseline power in frost-free state; Based on the set of operating parameters and the set of preset parameters, determine the relative power growth coefficient, relative ambient humidity coefficient, relative operating time coefficient, and relative energy consumption attenuation coefficient; The defrosting cycle index is determined based on the relative power growth coefficient, relative ambient humidity coefficient, relative operating time coefficient, and relative energy consumption attenuation coefficient. Compare the anti-frost cycle index with the preset anti-frost activation threshold; When the anti-frost cycle index is greater than the preset anti-frost activation threshold, the anti-frost cycle is activated.

4. The frost suppression control method according to claim 3, characterized in that, The process of determining the relative power growth coefficient, relative ambient humidity coefficient, relative operating time coefficient, and relative energy consumption attenuation coefficient based on the operating parameter set and the preset parameter set includes: The motor power growth rate is determined based on the growth rate of the motor operating power relative to the baseline power in the frost-free state, and the relative power growth coefficient is determined based on the ratio of the motor power growth rate to the motor power growth rate threshold. The relative humidity coefficient is determined based on the ratio of the ambient humidity to the ambient humidity reference value. The relative operating time coefficient is determined based on the ratio of the continuous heating operation time to the defrosting operation time threshold. The relative energy consumption attenuation coefficient is determined by the ratio of the attenuation rate of the current operating energy consumption to the initial operating energy consumption to the baseline value of the energy consumption attenuation rate.

5. The frost suppression control method according to claim 4, characterized in that, The motor power growth rate is determined based on the growth rate of the motor operating power relative to the reference power in the frost-free state, and is configured as the ratio of the difference between the motor operating power and the reference power in the frost-free state to the reference power in the frost-free state.

6. The frost suppression control method according to claim 3, characterized in that, The determination of the defrosting cycle index based on the relative power growth coefficient, relative ambient humidity coefficient, relative operating time coefficient, and relative energy consumption attenuation coefficient includes: The relative power growth coefficient is weighted according to the preset power growth rate weight to obtain the weighted relative power growth coefficient. The relative humidity coefficient is weighted according to a preset environmental humidity weight to obtain a weighted relative humidity coefficient. The relative running time coefficient is weighted according to a preset running time weight to obtain the weighted relative running time coefficient. The relative energy consumption attenuation coefficient is weighted according to a preset energy consumption attenuation weight to obtain the weighted relative energy consumption attenuation coefficient. The weighted relative power growth coefficient, the weighted relative ambient humidity coefficient, the weighted relative operating time coefficient, and the weighted relative energy consumption decay coefficient are summed to obtain the frost suppression cycle index; wherein the sum of the preset power growth rate weight, the preset ambient humidity weight, the preset operating time weight, and the preset energy consumption decay weight is 1.

7. The frost suppression control method according to claim 6, characterized in that, The preset power growth rate weight is greater than any one of the preset ambient humidity weight, the preset running time weight, and the preset energy consumption attenuation weight.

8. A frost suppression control device, characterized in that, include: The parameter acquisition module is used to acquire the operating parameter set and preset parameter set of the defrosting heat pump unit; wherein, the operating parameter set includes: motor operating power, ambient humidity, continuous heating operation time, and the attenuation rate of current operating energy consumption compared with the initial operating energy consumption; the preset parameter set includes: motor power growth rate threshold, ambient humidity baseline value, defrosting operation time threshold, energy consumption attenuation rate baseline value, and baseline power in frost-free state; The first processing module is used to determine the relative power growth coefficient, relative ambient humidity coefficient, relative operating time coefficient, and relative energy consumption attenuation coefficient based on the operating parameter set and the preset parameter set. The second processing module is used to determine the defrosting cycle index based on the relative power growth coefficient, relative ambient humidity coefficient, relative operating time coefficient, and relative energy consumption attenuation coefficient. The judgment module is used to compare the anti-frost cycle index with the preset anti-frost activation threshold. The execution module is used to start the anti-frost cycle when the anti-frost cycle index is greater than the preset anti-frost start threshold.

9. A heat pump unit control device, characterized in that, include: Memory and one or more processors; The memory is used to store one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the anti-frost control method as described in any one of claims 3 to 7.

10. A storage medium for storing computer-executable instructions, characterized in that, The computer-executable instructions, when executed by a processor, are used to perform the defrosting control method as described in any one of claims 3 to 7.

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