Control method and device of phase change energy storage tank and electronic equipment

Abstract

The application provides a control method and device of a phase change energy storage tank and electronic equipment, the control method can actively identify whether the phase change energy storage tank is fully heated, whether a heat accumulation defrosting mode is faulty, and whether a heat preservation layer of the phase change energy storage tank is ineffective, thereby ensuring heating comfort during defrosting, and relieving the technical problem that the existing control method of the phase change energy storage tank cannot actively identify insufficient heat accumulation and ineffective heat preservation.

Description

Technical Field

[0001] This invention relates to the technical field of multi-split heat pump systems, and in particular to a control method, device, and electronic equipment for a phase change energy storage box. Background Technology

[0002] Existing multi-split heat pump systems are equipped with phase change energy storage tanks, such as Figure 1 As shown, this phase change energy storage box optimizes the original reverse cycle defrosting into heat storage defrosting to improve the user's heating comfort.

[0003] However, the existing phase change energy storage box's heat storage defrosting process cannot confirm whether the phase change energy storage box has stored enough heat to meet the defrosting energy demand. If the heat storage box is not full, defrosting will be incomplete, affecting the performance of the multi-split heat pump system. In addition, the existing multi-split heat pump system cannot effectively identify insulation layer failure, thus affecting the heating comfort during defrosting.

[0004] In summary, existing control methods for phase change energy storage boxes have technical problems in that they cannot actively identify insufficient heat storage and insulation layer failure. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a control method, device and electronic device for a phase change energy storage box, so as to alleviate the technical problem that the existing control methods for phase change energy storage boxes cannot actively identify insufficient heat storage and insulation layer failure.

[0006] In a first aspect, embodiments of the present invention provide a control method for a phase change energy storage box, comprising:

[0007] When the multi-split heat pump system is operating in a low-temperature environment for heating, it determines whether the phase change energy storage box has completed its heating process based on the conditions for completing the heating process of the phase change energy storage box.

[0008] If the phase change energy storage box has completed its heating process, determine whether to enter the heat storage defrosting mode.

[0009] If the heat storage defrosting mode is entered, it is determined whether the heat storage defrosting mode has malfunctioned based on the heat storage defrosting fault conditions.

[0010] If the heat storage defrosting mode fails, the multi-split heat pump system will be controlled to switch to reverse cycle defrosting mode in the next defrosting cycle.

[0011] If the heat storage defrosting mode is not entered, it is determined that the insulation layer of the phase change energy storage box has failed, and the multi-unit heat pump system is controlled to switch to the reverse cycle defrosting mode in the next defrosting cycle.

[0012] If the heat storage defrosting mode does not malfunction, then return to the step of determining whether the phase change energy storage box has completed its heat charging based on the heat charging completion conditions of the phase change energy storage box.

[0013] Furthermore, a first temperature sensor is installed near the liquid pipe of the phase change energy storage tank, and a second temperature sensor is installed on the tank wall. The determination of whether the phase change energy storage tank has completed charging is based on the charging completion conditions, including:

[0014] If the multi-split heat pump system is initially started, or the shutdown time of the multi-split heat pump system is longer than the first preset time, and the temperature detected by the second temperature sensor is greater than the first preset temperature, then it is determined that the phase change energy storage box has completed the heat charging.

[0015] If the defrosting timing condition is triggered, and the continuous heating operation time of the multi-split heat pump system is greater than the second preset time, and the charging time of the phase change energy storage box is greater than the third preset time, and after the compressor start-up platform is completed, the temperature detected by the first temperature sensor is greater than the second preset temperature, and the difference between the third preset temperature and the temperature detected by the second temperature sensor is greater than the fourth preset temperature, then it is determined that the phase change energy storage box has been fully charged.

[0016] Further, determining whether to enter the heat storage defrosting mode includes:

[0017] If the difference between the fifth preset temperature and the temperature detected by the second temperature sensor is greater than the sixth preset temperature, then the heat storage defrosting mode is allowed.

[0018] Furthermore, determining whether the heat storage defrosting mode has malfunctioned based on the heat storage defrosting failure conditions includes:

[0019] If the duration of the heat storage defrosting mode reaches the fourth preset duration, and the defrosting exit temperature does not reach the preset exit temperature, then the heat storage defrosting mode is determined to have malfunctioned, and defrosting is forcibly terminated. The defrosting exit temperature is the coil temperature of the condenser of the multi-split heat pump system.

[0020] Furthermore, the number of the second temperature sensors is multiple.

[0021] Furthermore, after the phase change energy storage box has been fully charged, before determining whether to enter the heat storage defrosting mode, the method further includes:

[0022] The electronic expansion valve that heats the phase change energy storage box is closed to interrupt the heating process of the phase change energy storage box.

[0023] Secondly, embodiments of the present invention also provide a control device for a phase change energy storage box, comprising:

[0024] The first determining unit is used to determine whether the phase change energy storage box has completed its heat charging based on the heat charging completion conditions of the phase change energy storage box when the multi-split heat pump system is running in a low-temperature environment.

[0025] The judgment unit is used to determine whether to enter the heat storage defrosting mode if the phase change energy storage box has completed the heat charging process.

[0026] The second determining unit is used to determine whether the heat storage defrosting mode has malfunctioned based on the heat storage defrosting fault conditions if the heat storage defrosting mode is entered.

[0027] The control unit is used to control the multi-split heat pump system to switch to reverse cycle defrosting mode in the next defrosting cycle if the heat storage defrosting mode fails.

[0028] The third determining unit is used to determine that the insulation layer of the phase change energy storage box has failed if the heat storage defrosting mode has not been entered, and to control the multi-unit heat pump system to switch to the reverse cycle defrosting mode in the next defrosting cycle.

[0029] The execution unit is returned to the step of determining whether the phase change energy storage box has completed its charging process based on the charging completion conditions of the phase change energy storage box if the heat storage defrosting mode has not failed.

[0030] Furthermore, a first temperature sensor is installed near the liquid pipe of the phase change energy storage tank, and a second temperature sensor is installed on the tank wall of the phase change energy storage tank. The first determining unit is also used for:

[0031] If the multi-split heat pump system is initially started, or the shutdown time of the multi-split heat pump system is longer than the first preset time, and the temperature detected by the second temperature sensor is greater than the first preset temperature, then it is determined that the phase change energy storage box has completed the heat charging.

[0032] If the defrosting timing condition is triggered, and the continuous heating operation time of the multi-split heat pump system is greater than the second preset time, and the charging time of the phase change energy storage box is greater than the third preset time, and after the compressor start-up platform is completed, the temperature detected by the first temperature sensor is greater than the second preset temperature, and the difference between the third preset temperature and the temperature detected by the second temperature sensor is greater than the fourth preset temperature, then it is determined that the phase change energy storage box has been fully charged.

[0033] Thirdly, embodiments of the present invention also provide an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the method described in any of the first aspects above.

[0034] Fourthly, embodiments of the present invention also provide a computer-readable storage medium storing machine-executable instructions, which, when invoked and executed by a processor, cause the processor to perform the method described in any of the first aspects above.

[0035] In this embodiment of the invention, a control method for a phase change energy storage box is provided, which can actively identify whether the phase change energy storage box has completed its heating process, whether the heat storage defrosting mode has malfunctioned, and whether the insulation layer of the phase change energy storage box has failed, thereby ensuring heating comfort during defrosting and alleviating the technical problem that existing control methods for phase change energy storage boxes cannot actively identify insufficient heat storage and insulation layer failure. Attached Figure Description

[0036] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the structure of a multi-unit heat pump system provided in an embodiment of the present invention;

[0038] Figure 2 A flowchart illustrating a control method for a phase change energy storage box provided in an embodiment of the present invention;

[0039] Figure 3 A circulation diagram of the phase change energy storage tank in the heat charging mode when the multi-split heat pump system provided in the embodiment of the present invention is running in a low-temperature environment for heating operation;

[0040] Figure 4 A circulation diagram of the phase change energy storage tank in heat release mode when the multi-split heat pump system provided in the embodiment of the present invention is running in a low-temperature environment for heating operation;

[0041] Figure 5 A schematic diagram of a control device for a phase change energy storage box provided in an embodiment of the present invention;

[0042] Figure 6 This is a schematic diagram of an electronic device provided in an embodiment of the present invention. Detailed Implementation

[0043] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] Existing control methods for phase change energy storage boxes cannot proactively identify technical problems such as insufficient heat storage and insulation layer failure.

[0045] Based on this, the control method of the phase change energy storage box of the present invention can actively identify whether the phase change energy storage box has completed heating, identify whether the heat storage defrosting mode has malfunctioned, and identify whether the insulation layer of the phase change energy storage box has failed, thereby ensuring heating comfort during defrosting.

[0046] To facilitate understanding of this embodiment, a control method for a phase change energy storage box disclosed in this embodiment of the invention will first be described in detail.

[0047] Example 1:

[0048] According to an embodiment of the present invention, an embodiment of a control method for a phase change energy storage box is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0049] Figure 2 This is a flowchart of a control method for a phase change energy storage box according to an embodiment of the present invention, such as... Figure 2 As shown, the method includes the following steps:

[0050] Step S202: When the multi-split heat pump system is running in a low-temperature environment, determine whether the phase change energy storage box has completed its heat charging according to the heat charging completion conditions of the phase change energy storage box.

[0051] Figure 3 The diagram shows the cycle of the phase change energy storage box in the charging mode when the multi-split heat pump system is running in a low-temperature environment. In the embodiment of the present invention, the charging completion condition of the phase change energy storage box is used to determine whether the phase change energy storage box has been fully charged. The process will be described in detail below and will not be repeated here.

[0052] The conditions for completing the heating of the aforementioned phase change energy storage box were summarized by the inventors after conducting numerous experiments.

[0053] Step S204: If the phase change energy storage box has been fully charged, determine whether to enter the heat storage defrosting mode.

[0054] Step S206: If the heat storage defrosting mode is entered, determine whether the heat storage defrosting mode has malfunctioned based on the heat storage defrosting fault conditions.

[0055] Figure 4 The diagram shows the cycle of the phase change energy storage tank in heat release mode (when the condenser is defrosting) when the multi-split heat pump system is running in a low-temperature environment.

[0056] Step S208: If the heat storage defrosting mode fails, control the multi-split heat pump system to switch to reverse cycle defrosting mode in the next defrosting cycle.

[0057] Step S210: If the heat storage defrosting mode is not entered, it is determined that the insulation layer of the phase change energy storage box has failed, and the multi-unit heat pump system is controlled to switch to the reverse circulation defrosting mode in the next defrosting cycle.

[0058] Step S212: If the thermal storage defrosting mode does not malfunction, return to the step of determining whether the phase change energy storage box has completed its thermal charging based on the charging completion conditions of the phase change energy storage box.

[0059] In this embodiment of the invention, a control method for a phase change energy storage box is provided, comprising: when a multi-split heat pump system is operating in a low-temperature environment for heating, determining whether the phase change energy storage box has completed its heating based on the charging completion conditions of the phase change energy storage box; if the phase change energy storage box has completed its heating, determining whether to enter a heat storage defrosting mode; if the heat storage defrosting mode has been entered, determining whether a fault has occurred in the heat storage defrosting mode based on the heat storage defrosting fault conditions; if a fault has occurred in the heat storage defrosting mode, controlling the multi-split heat pump system to switch to a reverse circulation defrosting mode in the next defrosting cycle; if the heat storage defrosting mode has not been entered, determining that the insulation layer of the phase change energy storage box has failed, and controlling the multi-split heat pump system to switch to a reverse circulation defrosting mode in the next defrosting cycle; if the heat storage defrosting mode has not failed, returning to the step of determining whether the phase change energy storage box has completed its heating based on the charging completion conditions of the phase change energy storage box. As can be seen from the above description, the control method of the phase change energy storage box of the present invention can actively identify whether the phase change energy storage box has completed heating, whether the heat storage defrosting mode has malfunctioned, and whether the insulation layer of the phase change energy storage box has failed, thereby ensuring the heating comfort during defrosting and alleviating the technical problem that the existing control method of the phase change energy storage box cannot actively identify insufficient heat storage and insulation layer failure.

[0060] The above provides a brief overview of the control method for the phase change energy storage box of the present invention. The specific details involved are described in detail below.

[0061] In an optional embodiment of the present invention, a first temperature sensor is provided near the liquid pipe of the phase change energy storage tank, and a second temperature sensor is provided on the tank wall of the phase change energy storage tank. The determination of whether the phase change energy storage tank has completed charging based on the charging completion conditions of the phase change energy storage tank specifically includes the following steps:

[0062] (1) If the multi-split heat pump system is initially started, or the shutdown time of the multi-split heat pump system is longer than the first preset time, and the temperature detected by the second temperature sensor is greater than the first preset temperature, then it is determined that the phase change energy storage box has been fully charged.

[0063] The first preset duration can be 1 hour. This embodiment of the invention does not impose a specific limitation on the first preset duration. The first preset duration may be different for different multi-split heat pump systems. The first preset temperature can be 20 degrees Celsius.

[0064] (2) If the defrosting timing condition is triggered, and the continuous heating operation time of the multi-split heat pump system is greater than the second preset time, and the charging time of the phase change energy storage box is greater than the third preset time, and after the compressor start-up platform is completed, the temperature detected by the first temperature sensor is greater than the second preset temperature, and the difference between the third preset temperature and the temperature detected by the second temperature sensor is greater than the fourth preset temperature, then it is determined that the phase change energy storage box is fully charged.

[0065] The so-called defrosting timing trigger is the timing trigger condition for entering the defrosting stage. The second preset duration can be 20 minutes, the third preset duration can be 20 minutes, the temperature detected by the first temperature sensor is actually the outlet temperature of the phase change energy storage box, the second preset temperature can be 32 degrees, the third preset temperature can be 28 degrees, the temperature detected by the second temperature sensor is actually the wall temperature of the box, the fourth preset temperature can be 7 degrees, and the compressor start-up platform refers to the entire frequency ramp-up process of the compressor from low frequency to high frequency.

[0066] If neither of the above two situations applies, then the phase change energy storage box has not been fully charged.

[0067] In an optional embodiment of the present invention, determining whether to enter the heat storage defrosting mode specifically includes the following steps:

[0068] If the difference between the fifth preset temperature and the temperature detected by the second temperature sensor is greater than the sixth preset temperature, then the heat storage defrosting mode is allowed.

[0069] The fifth preset temperature can be 28 degrees and the sixth preset temperature can be 10 degrees. If 28 - the temperature detected by the second temperature sensor is greater than 10 degrees, the heat storage defrosting mode is allowed. Otherwise, the heat storage defrosting mode is not allowed, and the insulation layer of the phase change energy storage box is determined to be ineffective. Then, the multi-split heat pump system is controlled to switch to the reverse circulation defrosting mode in the next defrosting cycle.

[0070] In an optional embodiment of the present invention, determining whether a fault has occurred in the heat storage defrosting mode based on the heat storage defrosting fault conditions specifically includes the following steps:

[0071] If the duration of the heat storage defrosting mode reaches the fourth preset duration, and the defrosting exit temperature does not reach the preset exit temperature, then the heat storage defrosting mode is determined to have malfunctioned, and defrosting is forcibly terminated. The defrosting exit temperature is the coil temperature of the condenser of the multi-split heat pump system.

[0072] The fourth preset duration mentioned above can be 10 minutes. Apart from the above situations, it is confirmed that the heat storage defrosting mode has not malfunctioned.

[0073] In an optional embodiment of the present invention, after the phase change energy storage box has been fully charged and before determining whether to enter the heat storage defrosting mode, the method further includes:

[0074] The electronic expansion valve that charges the phase change energy storage box is closed to interrupt the charging process. The multi-split heat pump system continues to operate in heating mode, and the heat from the phase change energy storage box is put on standby.

[0075] In an optional embodiment of the present invention, the number of second temperature sensors is multiple.

[0076] Specifically, if there are three second temperature sensors, each of which is located at the top, middle, and bottom of the enclosure wall, the temperature detected by the second temperature sensor is the average temperature detected by the multiple second temperature sensors.

[0077] The control method of the phase change energy storage box of the present invention can actively identify faults such as insulation failure and insufficient heat storage to ensure heating comfort during defrosting.

[0078] Example 2:

[0079] This invention also provides a control device for a phase change energy storage box. This control device is mainly used to execute the control method for the phase change energy storage box provided in Embodiment 1 of this invention. The control device for the phase change energy storage box provided in this invention will be described in detail below.

[0080] Figure 5 This is a schematic diagram of a control device for a phase change energy storage box according to an embodiment of the present invention, such as... Figure 5 As shown, the device mainly includes: a first determining unit 10, a judging unit 20, a second determining unit 30, a control unit 40, a third determining unit 50, and a return execution unit 60, wherein:

[0081] The first determining unit is used to determine whether the phase change energy storage box has completed its heat charging based on the heat charging completion conditions of the phase change energy storage box when the multi-split heat pump system is running in a low-temperature environment.

[0082] The judgment unit is used to determine whether to enter the heat storage defrosting mode if the phase change energy storage box has completed the heat charging process.

[0083] The second determining unit is used to determine whether the heat storage defrosting mode has malfunctioned based on the heat storage defrosting fault conditions if the heat storage defrosting mode is entered.

[0084] The control unit is used to control the multi-split heat pump system to switch to reverse cycle defrosting mode in the next defrosting cycle if the heat storage defrosting mode fails.

[0085] The third determining unit is used to determine that the insulation layer of the phase change energy storage box has failed if the heat storage defrosting mode has not been entered, and to control the multi-split heat pump system to switch to reverse cycle defrosting mode in the next defrosting cycle.

[0086] The return execution unit is used to return to the execution step of determining whether the phase change energy storage box has completed its charging based on the charging completion conditions of the phase change energy storage box if no fault occurs in the thermal storage defrosting mode.

[0087] In this embodiment of the invention, a control device for a phase change energy storage box is provided, which can actively identify whether the phase change energy storage box has completed its heating process, whether the heat storage defrosting mode has malfunctioned, and whether the insulation layer of the phase change energy storage box has failed, thereby ensuring heating comfort during defrosting and alleviating the technical problem that existing control methods for phase change energy storage boxes cannot actively identify insufficient heat storage and insulation layer failure.

[0088] Optionally, a first temperature sensor is installed near the liquid pipe of the phase change energy storage box, and a second temperature sensor is installed on the box wall of the phase change energy storage box. The first determining unit is further configured to: determine that the phase change energy storage box is fully charged if the multi-split heat pump system is initially started, or the shutdown time of the multi-split heat pump system is longer than a first preset time, and the temperature detected by the second temperature sensor is greater than the first preset temperature; determine that the phase change energy storage box is fully charged if the defrosting timing condition is triggered, and the continuous heating operation time of the multi-split heat pump system is longer than the second preset time, and the charging time of the phase change energy storage box is longer than the third preset time, and after the compressor start-up platform is completed, the temperature detected by the first temperature sensor is greater than the second preset temperature, and the difference between the third preset temperature and the temperature detected by the second temperature sensor is greater than the fourth preset temperature.

[0089] Optionally, the judgment unit is further configured to: allow the heat storage defrosting mode to be entered if the difference between the fifth preset temperature and the temperature detected by the second temperature sensor is greater than the sixth preset temperature.

[0090] Optionally, the second determining unit is further configured to: if the duration of the heat storage defrosting mode reaches a fourth preset duration, and the defrosting exit temperature does not reach the preset exit temperature, then determine that the heat storage defrosting mode has malfunctioned and forcibly exit defrosting, wherein the defrosting exit temperature is the coil temperature of the condenser of the multi-split heat pump system.

[0091] Optionally, the number of second temperature sensors may be multiple.

[0092] Optionally, the device is also used to: close the electronic expansion valve that heats the phase change energy storage box, thereby interrupting the heating of the phase change energy storage box.

[0093] The device provided in this embodiment of the invention has the same implementation principle and technical effect as the aforementioned method embodiment. For the sake of brevity, any parts not mentioned in the device embodiment can be referred to the corresponding content in the aforementioned method embodiment.

[0094] like Figure 6 As shown in the embodiment of this application, an electronic device 600 includes a processor 601, a memory 602, and a bus. The memory 602 stores machine-readable instructions that can be executed by the processor 601. When the electronic device is running, the processor 601 communicates with the memory 602 via the bus. The processor 601 executes the machine-readable instructions to perform the steps of the control method for the phase change energy storage box described above.

[0095] Specifically, the memory 602 and processor 601 mentioned above can be general-purpose memory and processor, without any specific limitations. When the processor 601 runs the computer program stored in the memory 602, it can execute the control method of the phase change energy storage box mentioned above.

[0096] The processor 601 may be an integrated circuit chip with signal processing capabilities. In implementation, each step of the above method can be completed by the integrated logic circuitry in the hardware of the processor 601 or by instructions in software form. The processor 601 may be a general-purpose processor, including a Central Processing Unit (CPU), a Network Processor (NP), etc.; it may 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 gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this application can be directly manifested as execution by a hardware decoding processor, or execution by a combination of hardware and software modules in the decoding processor. The software module can reside in a mature storage medium in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, or registers. This storage medium is located in memory 602, and processor 601 reads the information from memory 602 and, in conjunction with its hardware, completes the steps of the above method.

[0097] Corresponding to the control method of the phase change energy storage box described above, this application embodiment also provides a computer-readable storage medium storing machine-executable instructions. When the machine-executable instructions are called and run by a processor, the machine-executable instructions cause the processor to perform the steps of the control method of the phase change energy storage box described above.

[0098] The control device for the phase change energy storage box provided in this application embodiment can be specific hardware on the device or software or firmware installed on the device. The implementation principle and technical effects of the device provided in this application embodiment are the same as those in the foregoing method embodiments. For the sake of brevity, any parts not mentioned in the device embodiment can be referred to the corresponding content in the foregoing method embodiments. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can all be referred to the corresponding processes in the above method embodiments, and will not be repeated here.

[0099] In the embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the displayed or discussed mutual couplings, direct couplings, or communication connections may be through some communication interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.

[0100] For example, the flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram and / or flowchart, and combinations of blocks in block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0101] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0102] In addition, the functional units in the embodiments provided in this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0103] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause an electronic device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the vehicle marking method described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0104] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In addition, the terms "first", "second", "third", etc. are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0105] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the scope of the technology disclosed in this application; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application. All should be covered within the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims.

Claims

1. A control method for a phase change energy storage box, characterized in that, include: When the multi-split heat pump system is operating in a low-temperature environment for heating, it determines whether the phase change energy storage box has completed its heating process based on the conditions for completing the heating process of the phase change energy storage box. If the phase change energy storage box has completed its heating process, determine whether to enter the heat storage defrosting mode. If the heat storage defrosting mode is entered, it is determined whether the heat storage defrosting mode has malfunctioned based on the heat storage defrosting fault conditions. If the heat storage defrosting mode fails, the multi-split heat pump system will be controlled to switch to reverse cycle defrosting mode in the next defrosting cycle. If the heat storage defrosting mode is not entered, it is determined that the insulation layer of the phase change energy storage box has failed, and the multi-unit heat pump system is controlled to switch to the reverse cycle defrosting mode in the next defrosting cycle. If the heat storage defrosting mode does not fail, then return to the step of determining whether the phase change energy storage box has been fully charged based on the charging completion conditions of the phase change energy storage box; A first temperature sensor is installed near the liquid pipe of the phase change energy storage tank, and a second temperature sensor is installed on the tank wall. The determination of whether the phase change energy storage tank has completed charging based on the charging completion conditions includes: If the multi-split heat pump system is initially started, or the shutdown time of the multi-split heat pump system is longer than the first preset time, and the temperature detected by the second temperature sensor is greater than the first preset temperature, then it is determined that the phase change energy storage box has completed the heat charging. If the defrosting timing condition is triggered, and the continuous heating operation time of the multi-split heat pump system is greater than the second preset time, and the charging time of the phase change energy storage box is greater than the third preset time, and after the compressor start-up platform is completed, the temperature detected by the first temperature sensor is greater than the second preset temperature, and the difference between the third preset temperature and the temperature detected by the second temperature sensor is greater than the fourth preset temperature, then it is determined that the phase change energy storage box has been fully charged. The process of determining whether to enter the heat storage defrosting mode includes: If the difference between the fifth preset temperature and the temperature detected by the second temperature sensor is greater than the sixth preset temperature, then the heat storage defrosting mode is allowed.

2. The control method according to claim 1, characterized in that, Determining whether the heat storage defrosting mode has malfunctioned based on the heat storage defrosting failure conditions includes: If the duration of the heat storage defrosting mode reaches the fourth preset duration, and the defrosting exit temperature does not reach the preset exit temperature, then the heat storage defrosting mode is determined to have malfunctioned, and defrosting is forcibly terminated. The defrosting exit temperature is the coil temperature of the condenser of the multi-split heat pump system.

3. The control method according to claim 1, characterized in that, The number of the second temperature sensors is multiple.

4. The control method according to claim 1, characterized in that, After the phase change energy storage tank has been fully charged, and before determining whether to enter the thermal storage defrosting mode, the method further includes: The electronic expansion valve that heats the phase change energy storage box is closed to interrupt the heating process of the phase change energy storage box.

5. A control device for a phase change energy storage box, characterized in that, include: The first determining unit is used to determine whether the phase change energy storage box has completed its heat charging based on the heat charging completion conditions of the phase change energy storage box when the multi-split heat pump system is running in a low-temperature environment. The judgment unit is used to determine whether to enter the heat storage defrosting mode if the phase change energy storage box has completed the heat charging process. The second determining unit is used to determine whether the heat storage defrosting mode has malfunctioned based on the heat storage defrosting fault conditions if the heat storage defrosting mode is entered. The control unit is used to control the multi-split heat pump system to switch to reverse cycle defrosting mode in the next defrosting cycle if the heat storage defrosting mode fails. The third determining unit is used to determine that the insulation layer of the phase change energy storage box has failed if the heat storage defrosting mode has not been entered, and to control the multi-unit heat pump system to switch to the reverse cycle defrosting mode in the next defrosting cycle. The return execution unit is used to return to the execution step of determining whether the phase change energy storage box has completed its heat charging based on the heat charging completion conditions of the phase change energy storage box if the heat storage defrosting mode has not failed. A first temperature sensor is installed near the liquid pipe of the phase change energy storage tank, and a second temperature sensor is installed on the tank wall. The first determining unit is further configured to: If the multi-split heat pump system is initially started, or the shutdown time of the multi-split heat pump system is longer than the first preset time, and the temperature detected by the second temperature sensor is greater than the first preset temperature, then it is determined that the phase change energy storage box has completed the heat charging. If the defrosting timing condition is triggered, and the continuous heating operation time of the multi-split heat pump system is greater than the second preset time, and the charging time of the phase change energy storage box is greater than the third preset time, and after the compressor start-up platform is completed, the temperature detected by the first temperature sensor is greater than the second preset temperature, and the difference between the third preset temperature and the temperature detected by the second temperature sensor is greater than the fourth preset temperature, then it is determined that the phase change energy storage box has been fully charged. The judgment unit is further configured to: allow entry into the heat storage defrosting mode if the difference between the fifth preset temperature and the temperature detected by the second temperature sensor is greater than the sixth preset temperature.

6. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 4.

7. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores machine-executable instructions that, when invoked and executed by a processor, cause the processor to perform the method according to any one of claims 1 to 4.

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