Heating system, heat storage control method, storage medium, and electronic device

Abstract

This application discloses a heating, ventilation, and air conditioning (HVAC) system, a heat storage control method, a storage medium, and an electronic device. The HVAC system includes a heat pump outdoor unit and a phase change heat storage module. The phase change heat storage module has a charging flow path with one charging inlet and at least two charging outlets. The at least two charging outlets are arranged sequentially at intervals along the direction away from the charging inlet. The charging outlet furthest from the charging inlet among the at least two charging outlets is the first charging outlet, and the charging outlet other than the first charging outlet is the second charging outlet. The charging inlet is connected to the outlet of the heat pump outdoor unit, the second charging outlet is connected to the inlet of the heat pump outdoor unit, and the first charging outlet is connected to the inlet of the heat pump outdoor unit. The charging inlet and the first charging outlet constitute the inlet and outlet of the charging flow path in the first working mode of the phase change heat storage module, and the charging inlet and any one of the second charging outlets constitute the inlet and outlet of the charging flow path in the second working mode of the phase change heat storage module.

Description

Technical Field

[0001] This application relates to the field of heating, ventilation and air conditioning (HVAC) technology, and more particularly to an HVAC system, a heat storage control method, a storage medium, and an electronic device. Background Technology

[0002] In related technologies, phase change thermal storage modules can utilize the phase change absorption / release characteristics to heat tap water and provide users with comfortable domestic hot water. Compared to traditional storage-type heat pump water heaters, energy storage hot water supply devices developed based on phase change thermal storage modules have the advantage of smaller size.

[0003] Phase change thermal storage modules can not only achieve thermal storage through indirect heat exchange between hot water and phase change materials, but also release heat through indirect heat exchange between cold water and phase change materials. However, in scenarios designed for thermal storage, because the heat absorption of phase change materials is relatively uniform, the heat stored in the phase change materials is insufficient to meet the demand for releasing hot water at a certain temperature in the early stages of the thermal storage process. Therefore, there is a problem that phase change thermal storage modules cannot quickly release hot water at a certain temperature. Summary of the Invention

[0004] This application provides a heating, ventilation, and air conditioning system, a thermal storage control method, a storage medium, and an electronic device. The technical solution is as follows:

[0005] In a first aspect, embodiments of this application provide a heating, ventilation, and air conditioning (HVAC) system, the HVAC system comprising:

[0006] A heat pump outdoor unit, the heat pump outdoor unit including a control unit;

[0007] The system includes a phase change heat storage module with a charging flow path. The charging flow path has one charging inlet and at least two charging outlets. The at least two charging outlets are sequentially spaced apart along a direction away from the charging inlet. The charging outlet furthest from the charging inlet among the at least two charging outlets is the first charging outlet. The charging outlet other than the first charging outlet is the second charging outlet. The charging inlet is connected to the outlet of the outdoor unit of the heat pump. The second charging outlet is connected to the inlet of the outdoor unit of the heat pump. The first charging outlet is connected to the inlet of the outdoor unit of the heat pump. The phase change heat storage module has a first operating mode and a second operating mode. The charging inlet and the first charging outlet constitute the inlet and outlet of the charging flow path in the first operating mode. The charging inlet and any one of the second charging outlets constitute the inlet and outlet of the charging flow path in the second operating mode.

[0008] The control unit is configured to:

[0009] If the user sets the hot water production mode to the second working mode, the charging flow path in the second working mode is controlled to be in a connected state, and phase change heat storage treatment is performed based on the charging flow path in the second working mode. The inlet temperature of the heat pump outdoor unit is monitored, and the charging flow path in the first working mode is controlled to be in a connected state based on the inlet temperature, and phase change heat storage treatment is performed based on the charging flow path in the first working mode.

[0010] If the user sets the hot water production mode to the first working mode, the energy charging flow path in the first working mode is kept in a connected state, and phase change heat storage treatment is performed based on the energy charging flow path in the first working mode.

[0011] In one possible implementation, the charging flow path has a charging inlet, a first charging outlet, and at least two second charging outlets. The second charging outlet furthest from the first charging outlet among the at least two second charging outlets is the third charging outlet. The second charging outlet other than the third charging outlet among the at least two second charging outlets is the fourth charging outlet. The charging inlet and the third charging outlet constitute the inlet and outlet of the first charging flow path in the second operating mode. The charging inlet and any one of the fourth charging outlets constitute the inlet and outlet of the second charging flow path in the second operating mode.

[0012] In one possible implementation, the control unit is configured to:

[0013] If the user sets the hot water production mode to the second working mode, then the first charging flow path in the second working mode is controlled to be in a connected state, and phase change heat storage treatment is performed based on the first charging flow path in the second working mode. The inlet temperature of the heat pump outdoor unit is monitored, and based on the inlet temperature, the second charging flow path in the second working mode is controlled to be in a connected state, and phase change heat storage treatment is performed based on the second charging flow path. Based on the inlet temperature, the charging flow path in the first working mode is controlled to be in a connected state, and phase change heat storage treatment is performed based on the charging flow path in the first working mode.

[0014] In one possible implementation, the control unit is configured to:

[0015] If the inlet temperature is greater than or equal to the first temperature threshold and the first duration is greater than or equal to the first duration threshold, then the third charging flow path is controlled to be in a connected state, and phase change heat storage treatment is performed based on the third charging flow path. The third charging flow path is the second charging flow path closest to the first charging flow path in the second working mode.

[0016] The temperature increase of the inlet temperature is monitored. If the temperature increase is the second temperature threshold and the inlet temperature after the temperature rise is less than the third temperature threshold, then the second charging flow path other than the third charging flow path is controlled to be in a connected state, and phase change heat storage treatment is performed based on the second charging flow path other than the third charging flow path.

[0017] If the inlet temperature is greater than or equal to the third temperature threshold and the second duration is greater than or equal to the second duration threshold, then the charging flow path in the first working mode is controlled to be in a connected state, and phase change heat storage treatment is performed based on the charging flow path in the first working mode.

[0018] Wherein, the first duration is the duration during which the inlet temperature is greater than or equal to the first temperature threshold, and the second duration is the duration during which the inlet temperature is greater than or equal to the third temperature threshold.

[0019] In one possible implementation, the control unit is configured to:

[0020] The difference between the preset material phase transition temperature and the first preset temperature is calculated to obtain the first temperature threshold.

[0021] The sum of the preset material phase transition temperature and the second preset temperature is calculated to obtain the second temperature threshold.

[0022] In one possible implementation, the charging flow path has a charging inlet, a first charging outlet, and a second charging outlet, and the control unit is configured to:

[0023] If the inlet temperature is greater than or equal to the third temperature threshold and the third duration is greater than or equal to the third duration threshold, then the charging flow path in the first working mode is controlled to be in a connected state, and phase change heat storage treatment is performed based on the charging flow path in the first working mode.

[0024] The third duration is the duration during which the inlet water temperature is greater than or equal to a third temperature threshold.

[0025] In one possible implementation, the phase change thermal storage module further includes a first electronic control switch and at least one second electronic control switch. The first end of the first electronic control switch is connected to the water inlet of the heat pump outdoor unit, the second end of the first electronic control switch is connected to the first charging outlet, the third end of the first electronic control switch is connected to the first end of each of the second electronic control switches, and the second end of each of the second electronic control switches is connected to the second charging outlet controlled by each of the second electronic control switches.

[0026] In one possible implementation, the control unit is configured to:

[0027] The charging flow path in the second working mode is kept in a connected state by controlling the first electronic control switch and any one of the second electronic control switches.

[0028] The first electronic control switch controls the charging flow path in the first working mode to be in a connected state.

[0029] In one possible implementation, when the charging flow path has one charging inlet and two charging outlets, the phase change heat storage module includes two third electronic control switches, the first end of each third electronic control switch being connected to the charging outlet controlled by each third electronic control switch, and the second end of each third electronic control switch being connected to the water inlet of the heat pump outdoor unit.

[0030] In one possible implementation, the control unit is configured to:

[0031] The charging flow path in the second working mode is kept in a connected state by the two third electronic control switches.

[0032] The charging path in the first working mode is kept in a connected state by the two third electronic control switches.

[0033] Secondly, embodiments of this application provide a heat storage control method applied to a heating, ventilation, and air conditioning (HVAC) system, the HVAC system comprising:

[0034] Heat pump outdoor unit;

[0035] The system includes a phase change heat storage module with a charging flow path. The charging flow path has one charging inlet and at least two charging outlets. The at least two charging outlets are sequentially spaced apart along a direction away from the charging inlet. The charging outlet furthest from the charging inlet among the at least two charging outlets is the first charging outlet. The charging outlet other than the first charging outlet is the second charging outlet. The charging inlet is connected to the outlet of the outdoor unit of the heat pump. The second charging outlet is connected to the inlet of the outdoor unit of the heat pump. The first charging outlet is connected to the inlet of the outdoor unit of the heat pump. The phase change heat storage module has a first operating mode and a second operating mode. The charging inlet and the first charging outlet are in a connected state, forming the inlet and outlet of the charging flow path in the first operating mode. The charging inlet and any one of the second charging outlets form the inlet and outlet of the charging flow path in the second operating mode.

[0036] The method includes:

[0037] If the user sets the hot water production mode to the second working mode, the charging flow path in the second working mode is controlled to be in a connected state, and phase change heat storage treatment is performed based on the charging flow path in the second working mode. The inlet temperature of the heat pump outdoor unit is monitored, and the charging flow path in the first working mode is controlled to be in a connected state based on the inlet temperature, and phase change heat storage treatment is performed based on the charging flow path in the first working mode.

[0038] If the user sets the hot water production mode to the first working mode, the energy charging flow path in the first working mode is kept in a connected state, and phase change heat storage treatment is performed based on the energy charging flow path in the first working mode.

[0039] Thirdly, embodiments of this application provide a computer storage medium having multiple instructions adapted for loading and executing the methods described above by a processor.

[0040] Fourthly, embodiments of this application provide a heating device, which may include: a memory and a processor; wherein the memory stores a computer program, the computer program being adapted to be loaded by the memory and to execute the above-described method.

[0041] The beneficial effects of the technical solutions provided in this application include at least the following:

[0042] The HVAC system provided in this application embodiment may include a heat pump outdoor unit and a phase change heat storage module. By configuring the energy-charging flow path of the phase change heat storage module to have one energy-charging inlet and at least two energy-charging outlets, the energy-charging inlet and energy-charging outlets at different locations can form energy-charging flow paths for different operating modes of the phase change heat storage module. Thus, when the user sets the hot water production mode to the second operating mode, since the path length of the energy-charging flow path in the second operating mode is less than the path length of the energy-charging flow path in the first operating mode, the energy-charging flow path in the second operating mode is first controlled to be in a connected state, and then the energy-charging in the first operating mode is controlled based on the inlet temperature of the heat pump outdoor unit. With the flow path in a connected state, in the early stage of the heat storage process, the phase change material corresponding to the charging flow path in the second working mode with a shorter path length can be fully utilized for heat storage. This allows some phase change material to quickly store enough heat to release hot water at a certain temperature, improving the heat release rate of the phase change heat storage module in the early stage of heat storage. Subsequently, based on the inlet temperature control of the heat pump outdoor unit, the charging flow path in the first working mode is kept in a connected state. This allows in the middle and / or later stages of the heat storage process, all the phase change material corresponding to the charging flow path in the first working mode with the longest path length can be fully utilized for heat storage, storing more heat to keep the hot water temperature stable. Therefore, the embodiments of this application can not only improve the heat release rate of the phase change heat storage module in the early stage of heat storage, but also maintain the hot water temperature stable after the hot water releases rapidly. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a schematic diagram of the structure of a heating, ventilation, and air conditioning system provided in an embodiment of this application;

[0045] Figure 2 This is a schematic diagram of another HVAC system provided in an embodiment of this application;

[0046] Figure 3 This is a schematic diagram of another HVAC system provided in the embodiments of this application;

[0047] Figure 4 This is a schematic flowchart of a heat storage control method provided in an embodiment of this application;

[0048] Figure 5 This is a schematic diagram of the structure of a heat storage control device provided in an embodiment of this application;

[0049] Figure 6 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0050] To make the inventive objectives, features, and advantages of the embodiments of this application more apparent and understandable, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0051] In the description of this application, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this application, it should be noted that, unless otherwise expressly specified and limited, "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, in the description of this application, unless otherwise stated, "multiple" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist; for example, A and / or B can represent: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0052] The present application will now be described in detail with reference to specific embodiments.

[0053] Please see Figure 1 This is a schematic diagram of the structure of a heating, ventilation, and air conditioning system provided in an embodiment of this application. Figure 1 As shown, the HVAC system may include a heat pump outdoor unit 100 and a phase change heat storage module 200, wherein,

[0054] The heat pump outdoor unit 100 includes a control unit 110, a water inlet 122, and a water outlet 124;

[0055] The phase change thermal energy storage module 200 includes a charging inlet 212 and at least two charging outlets 214. The at least two charging outlets 214 are arranged at intervals along the direction away from the charging inlet 212. The charging outlet farthest from the charging inlet 212 among the at least two charging outlets 214 is the first charging outlet, and the charging outlet other than the first charging outlet among the at least two charging outlets 214 is the second charging outlet. The charging inlet 212 is connected to the water outlet 124, the second charging outlet is connected to the water inlet 122, and the first charging outlet is connected to the water inlet 122.

[0056] It is understood that the outdoor unit of a heat pump is used to provide a heat source, and various types of heat source modules can be configured in the outdoor unit, such as electric heating modules, solar heating modules, water source heat exchange modules, and air source heat exchange modules. In one or more embodiments of this application, the outdoor unit of the heat pump is used to provide hot water.

[0057] Phase change thermal storage modules are used to store or release heat based on built-in phase change materials. They can indirectly exchange heat between the hot water provided by the heat pump outdoor unit and the phase change material to achieve heat storage, or they can indirectly exchange the heat stored in the phase change material with the cold water in the water-using unit to achieve heat release.

[0058] The phase change thermal storage module has a first working mode and a second working mode. The charging inlet and the first charging outlet can constitute the inlet and outlet of the charging flow path in the first working mode. The charging inlet and any one of the second charging outlets can constitute the inlet and outlet of the charging flow path in the second working mode.

[0059] In one or more embodiments of this application, the charging inlet 212 and the outlet 124 can be connected by an electronic switch, and any second charging outlet and the inlet 122 can also be connected by an electronic switch, as can the first charging outlet and the inlet 122. Specifically, when the electronic switch between the charging inlet 212 and the outlet 124 is in the open state, and the electronic switch between the first charging outlet and the inlet 122 is in the open state, the charging flow path in the first working mode is in a connected state; otherwise, when the electronic switch between the charging inlet 212 and the outlet 124 is in the closed state, and / or when the electronic switch between the first charging outlet and the inlet 122 is in the closed state, the charging flow path in the first working mode is in a disconnected state. When the electronic control switch between the charging inlet 212 and the outlet 124 is in the open state, and the electronic control switch between any one of the second charging outlets and the inlet 122 is in the open state, any charging flow path in the second working mode is in the connected state; otherwise, when the electronic control switch between the charging inlet 212 and the outlet 124 is in the closed state, and / or when all the electronic control switches between the second charging outlets and the inlet 122 are in the closed state, all charging flow paths in the second working mode are in the disconnected state.

[0060] In one or more embodiments of this application, the capacity of the phase change material corresponding to the charging flow path in the first operating mode is greater than the capacity of the phase change material corresponding to any charging flow path in the second operating mode. When the charging flow path in the first or second operating mode is in a connected state, the phase change heat storage module can exchange energy with the hot water from the heat pump outdoor unit through the phase change material corresponding to the charging flow path to store a certain amount of heat.

[0061] The following is about Figure 1 The working principle of the HVAC system shown is explained below:

[0062] Specifically, the control unit is configured to: if the user sets the hot water production mode to the second working mode, control the charging flow path in the second working mode to be in a connected state, perform phase change heat storage treatment based on the charging flow path in the second working mode, monitor the inlet temperature of the heat pump outdoor unit, control the charging flow path in the first working mode to be in a connected state based on the inlet temperature, and perform phase change heat storage treatment based on the charging flow path in the first working mode.

[0063] If the user sets the hot water production mode to the first working mode, the energy charging flow path in the first working mode is kept in a connected state, and phase change heat storage treatment is performed based on the energy charging flow path in the first working mode.

[0064] Among them, when the phase change thermal storage module produces hot water at the same temperature, the heating time consumed by the second working mode is less than that consumed by the first working mode. The second working mode can be understood as a rapid hot water production mode, while the first working mode can be understood as a conventional hot water production mode.

[0065] The inlet temperature refers to the temperature measured by the temperature sensor installed at the inlet of the heat pump outdoor unit.

[0066] In some implementations, the user-set hot water production mode is obtained. When the hot water production mode is the second working mode, the electronic control switch between the charging inlet and the outlet of the heat pump outdoor unit can be turned on, and the electronic control switch between the second charging outlet furthest from the first charging outlet and the inlet of the heat pump outdoor unit can be turned on, so that the charging flow path in the second working mode formed by the charging inlet and the second charging outlet furthest from the first charging outlet is connected, and phase change heat storage treatment is performed based on the charging flow path in the second working mode.

[0067] Furthermore, when the inlet water temperature is detected to be greater than or equal to a third temperature threshold, and the second duration is greater than or equal to a second duration threshold, the electrical control switch between the charging inlet and the outlet of the heat pump outdoor unit can be turned on, as can the electrical control switch between the first charging outlet and the inlet of the heat pump outdoor unit, so that the charging flow path in the first working mode is connected, and phase change heat storage treatment is performed based on the charging flow path in the first working mode. The third temperature threshold can be set as the sum of the phase change temperature when the phase change material built into the phase change heat storage module absorbs heat and a second preset temperature. The second preset temperature can be set based on the actual application environment, and its range can be 3–5 degrees Celsius. The second duration refers to the duration during which the inlet water temperature is greater than or equal to the third temperature threshold.

[0068] When the inlet temperature is detected to be lower than the third temperature threshold, in a scenario where the phase change heat storage module has multiple second charging flow paths under multiple second operating modes, the electrical control switch between the charging inlet and the outlet of the heat pump outdoor unit can be turned on, and the electrical control switch between the second charging outlet, which is furthest from the first charging outlet, and the inlet of the heat pump outdoor unit can be turned on in sequence. This ensures that the charging flow path in the second operating mode formed by the inlet and the second charging outlet, which is furthest from the first charging outlet, is connected in sequence. Phase change heat storage treatment is then performed based on the charging flow path in the second operating mode formed by the second charging outlet, which is furthest from the first charging outlet, and the inlet, until the inlet temperature is detected to be greater than or equal to the third temperature threshold and the second duration is greater than or equal to the second duration threshold. At this point, the charging flow path in the first operating mode is connected, and phase change heat storage treatment is performed based on the charging flow path in the first operating mode. The second charging outlet that is second furthest from the first charging outlet includes other second charging outlets besides the second charging outlet that is furthest from the first charging outlet. For example, the second charging outlet that is second furthest from the first charging outlet may include the second charging outlet that is furthest from the first charging outlet, the third charging outlet that is furthest from the first charging outlet, the fourth charging outlet that is furthest from the first charging outlet, and so on.

[0069] Alternatively, if the inlet temperature is detected to be lower than the third temperature threshold, in a scenario where the phase change heat storage module has a second charging flow path under a second operating mode, the phase change heat storage module has one and only one second charging outlet. The electrical control switch between the charging inlet and the outlet of the heat pump outdoor unit is kept open, as is the electrical control switch between the second charging outlet furthest from the first charging outlet and the inlet of the heat pump outdoor unit. This ensures that the charging flow path under the second operating mode formed by the first and second charging outlets is connected, and phase change heat storage is performed based on this charging flow path. Optionally, if the phase change heat storage module has one and only one second charging outlet, assuming the height of the phase change heat storage module is h, the vertical distance between the second charging outlet and the bottom of the phase change heat storage module can be set to a range of 0.5h to 0.7h.

[0070] In some other embodiments, the phase change thermal storage module has a charging flow path with a charging inlet, a first charging outlet, and a second charging outlet, and the control unit is configured to:

[0071] If the inlet temperature is greater than or equal to the third temperature threshold and the third duration is greater than or equal to the third duration threshold, then the charging flow path in the first working mode is controlled to be in a connected state, and phase change heat storage treatment is performed based on the charging flow path in the first working mode; wherein, the third duration is the duration during which the inlet temperature is greater than or equal to the third temperature threshold.

[0072] In the HVAC system provided in this application embodiment, the phase change heat storage module is configured with a charging flow path having one charging inlet and at least two charging outlets. This allows the charging inlet and charging outlets at different locations to form charging flow paths for different operating modes of the phase change heat storage module. Thus, when the user sets the hot water production mode to the second operating mode, since the path length of the charging flow path in the second operating mode is shorter than that in the first operating mode, the charging flow path in the second operating mode is first controlled to be in a connected state, and then the charging flow path in the first operating mode is controlled to be in a connected state based on the inlet temperature of the heat pump outdoor unit. This design allows the phase change material (PCT) in the second operating mode (with a shorter path length) to be fully utilized for heat storage during the early stages of the heat storage process. This enables the PCT to quickly store enough heat to release hot water at a certain temperature, thus improving the heat release rate of the phase change heat storage module in the early stages. Subsequently, the charging path in the first operating mode is kept connected based on the inlet temperature control of the heat pump outdoor unit. This allows the entire PCT corresponding to the charging path in the first operating mode (with the longest path length) to be fully utilized for heat storage during the middle and / or later stages of the heat storage process, storing more heat to maintain a stable hot water temperature. Therefore, this embodiment not only improves the heat release rate of the phase change heat storage module in the early stages of heat storage but also maintains a stable hot water temperature after rapid heat release.

[0073] Please see Figure 2 This is a schematic diagram of the structure of a heating, ventilation, and air conditioning system provided in an embodiment of this application. Figure 2 As shown, the HVAC system may include a heat pump outdoor unit 100 and a phase change heat storage module 200, wherein,

[0074] The heat pump outdoor unit 100 includes a control unit 110, a water inlet 122, and a water outlet 124;

[0075] The phase change thermal energy storage module 200 includes a charging inlet 212, at least two charging outlets 214, a first electronic control switch 222, and at least one second electronic control switch 224. The at least two charging outlets 214 are arranged at intervals along the direction away from the charging inlet 212. The charging outlet farthest from the charging inlet 212 among the at least two charging outlets 214 is the first charging outlet, and the charging outlet other than the first charging outlet among the at least two charging outlets 214 is the second charging outlet. The first end of the first electronic control switch 222 is connected to the water inlet 122, the second end of the first electronic control switch 222 is connected to the first charging outlet, the third end of the first electronic control switch 222 is connected to the first end of each second electronic control switch 224, and the second end of each second electronic control switch 224 is connected to the second charging outlet controlled by each second electronic control switch. The charging inlet 212 is connected to the water outlet 124.

[0076] The first electronic control switch can be a control valve used to change the flow direction of the fluid medium; for example, the first electronic control switch can be an electric three-way valve or other control valve. The second electronic control switch can be an automated component used to control the on / off state of the fluid medium; for example, the second electronic control switch can be a solenoid valve or other component.

[0077] In one or more embodiments of this application, the phase change thermal storage module has a charging flow path having a charging inlet, a first charging outlet, and at least two second charging outlets. The second charging outlet furthest from the first charging outlet among the at least two second charging outlets is the third charging outlet. The second charging outlet other than the third charging outlet among the at least two second charging outlets is the fourth charging outlet. The charging inlet and the third charging outlet constitute the inlet and outlet of the first charging flow path in the second working mode. The charging inlet and any one of the fourth charging outlets constitute the inlet and outlet of the second charging flow path in the second working mode. The charging inlet and the first charging outlet constitute the inlet and outlet of the charging flow path in the first working mode.

[0078] In one or more embodiments of this application, the capacity of the phase change material corresponding to the charging flow path in the first operating mode is greater than the capacity of the phase change material corresponding to any charging flow path in the second operating mode, and the capacity of the phase change material corresponding to the first charging flow path in the second operating mode is less than the capacity of the phase change material corresponding to any second charging flow path in the second operating mode. The capacity of the phase change material corresponding to the second charging flow path in the second operating mode increases as the distance between the second charging flow path and the first charging flow path increases.

[0079] The following is about Figure 2 The working principle of the HVAC system shown is explained below:

[0080] Specifically, the control unit is configured to: if the user sets the hot water production mode to the second working mode, control the first charging flow path in the second working mode to be in a connected state, perform phase change heat storage treatment based on the first charging flow path in the second working mode, monitor the inlet temperature of the heat pump outdoor unit, control the second charging flow path in the second working mode to be in a connected state based on the inlet temperature, perform phase change heat storage treatment based on the second charging flow path, control the charging flow path in the first working mode to be in a connected state based on the inlet temperature, and perform phase change heat storage treatment based on the charging flow path in the first working mode.

[0081] If the user sets the hot water production mode to the first working mode, the energy charging flow path in the first working mode is kept in a connected state, and phase change heat storage treatment is performed based on the energy charging flow path in the first working mode.

[0082] In one feasible implementation, the control unit is specifically configured to: if the inlet temperature is greater than or equal to a first temperature threshold and the first duration is greater than or equal to a first duration threshold, control the third charging flow path to be in a connected state, and perform phase change heat storage treatment based on the third charging flow path, wherein the third charging flow path is the second charging flow path closest to the first charging flow path in the second operating mode.

[0083] The temperature increase of the inlet water temperature is monitored. If the temperature increase is equal to the second temperature threshold and the inlet water temperature after the temperature rise is less than the third temperature threshold, then the second charging flow path in the second working mode is controlled to be in a connected state, and phase change heat storage treatment is performed based on the second charging flow path.

[0084] If the inlet temperature is greater than or equal to the third temperature threshold and the second duration is greater than or equal to the second duration threshold, then the charging flow path in the first working mode is controlled to be in a connected state, and phase change heat storage treatment is performed based on the charging flow path in the first working mode.

[0085] The first duration is the duration during which the inlet water temperature is greater than or equal to the first temperature threshold, and the second duration is the duration during which the inlet water temperature is greater than or equal to the third temperature threshold.

[0086] The first temperature threshold can be set as the difference between the phase change temperature of the phase change material built into the phase change heat storage module and the first preset temperature. The first preset temperature can be set based on the actual application environment, and the value range of the first preset temperature can be 3 to 5 degrees Celsius.

[0087] The aforementioned temperature increase refers to the temperature rise monitored at the inlet during each switch to a new charging flow path for phase change heat storage treatment. It can be understood that the third flow path is the newly switched charging flow path. Before phase change heat storage treatment based on the third charging flow path, the latest monitored inlet temperature is denoted as T1. During phase change treatment based on the third charging flow path, the latest monitored inlet temperature is denoted as T2. T2 is greater than T1, and the difference between T2 and T1 is the temperature increase. The inlet temperature after the temperature increase refers to the latest inlet temperature when the monitored temperature increase reaches the second temperature threshold.

[0088] The second temperature threshold can be set to a fixed value, for example, the second temperature threshold can be set to 2 degrees Celsius.

[0089] The third charging flow path is controlled to be in a connected state, and phase change heat storage treatment is performed based on the third charging flow path. This step can be implemented as follows: the first terminal of the first electronic control switch is controlled to be in a connected state with the water inlet of the heat pump outdoor unit; the second terminal of the first electronic control switch is controlled to be in a disconnected state; the third terminal of the first electronic control switch is controlled to be in a disconnected state with the first terminal of the second electronic control switch used to control the third charging outlet; the third terminal of the first electronic control switch is controlled to be in a connected state with the fourth charging outlet constituting the third charging flow path; and the fourth charging outlet constituting the third charging flow path is controlled to be in a connected state with the second terminal of the second electronic control switch used to control the fourth charging outlet constituting the third charging flow path, so that the third charging flow path is in a connected state, and phase change heat storage treatment is performed through the phase change material corresponding to the third charging flow path.

[0090] If the temperature increase is equal to the second temperature threshold, and the inlet temperature after the temperature increase is less than the third temperature threshold, then the second charging flow path in the second working mode is sequentially controlled to be in a connected state, and phase change heat storage treatment is sequentially performed based on the second charging flow path. This step can be implemented as follows: Since the number of second charging flow paths in the second working mode is at least one, when the number of second charging flow paths in the second working mode is at least two, the second charging flow path closest to the first charging flow path in the second working mode is the third charging flow path. Then the second charging flow path in the second working mode can include the third charging flow path and at least two second charging flow paths other than the third charging flow path. The at least two second charging flow paths other than the third charging flow path can include a second second charging flow path far away from the first charging flow path, a third second charging flow path far away from the first charging flow path, a fourth third charging flow path far away from the first charging flow path, and so on. During each switch to a new charging flow path for phase change heat storage, for example, when switching to the third charging flow path, if the detected temperature increase is equal to the second temperature threshold, and the inlet temperature after the temperature increase is still lower than the third temperature threshold, the first terminal of the first electronic control switch can be connected to the inlet of the heat pump outdoor unit, the third terminal of the first electronic control switch can be disconnected from the fourth charging outlet constituting the third charging flow path, the third terminal of the first electronic control switch can be connected to the fourth charging outlet constituting the second charging flow path (away from the first charging flow path), and the fourth charging outlet constituting the second charging flow path (away from the first charging flow path) can be connected to the second terminal of the second electronic control switch, so that the second... The second charging flow path, which is away from the first charging flow path, is in a connected state, and phase change heat storage treatment is performed through the phase change material corresponding to the second charging flow path, which is away from the first charging flow path. Similarly, when switching to the second charging flow path, which is away from the first charging flow path, for phase change heat storage treatment, if the temperature increase is detected to be at the second temperature threshold and the inlet temperature after the temperature increase is still less than the third temperature threshold, the third charging flow path, which is away from the first charging flow path, can be controlled to be in a connected state in the same way as the second charging flow path, which is away from the first charging flow path, and phase change heat storage treatment is performed through the phase change heat storage material corresponding to the third charging flow path, which is away from the first charging flow path. Similarly, the subsequent process of switching to the fourth charging flow path, which is away from the first charging flow path, for phase change heat storage treatment can refer to the above description and will not be detailed here.

[0091] Therefore, the purpose of configuring the phase change thermal storage module with multiple charging flow paths in the second working mode is that when performing phase change thermal storage based on the first charging flow path in the second working mode, the capacity of the phase change material corresponding to the first charging flow path in the second working mode is the smallest. At this time, it has a faster heat storage speed, which allows the hot water to reach a certain temperature more quickly. After the hot water reaches a certain temperature, more heat is needed. Then, it can be gradually switched to the second charging flow path with a larger phase change material capacity to ensure that there is enough heat to keep the temperature of the hot water stable.

[0092] The charging flow path in the first working mode is kept in a connected state, and phase change heat storage treatment is performed based on the charging flow path in the first working mode. This step can be implemented as follows: the first terminal of the first electronic control switch is connected to the water inlet of the heat pump outdoor unit, the second terminal of the first electronic control switch is connected to the first charging outlet, and the third terminal of the first electronic control switch is disconnected, so that the charging flow path in the first working mode is in a connected state, and phase change heat storage treatment is performed through the phase change material of the full capacity corresponding to the charging flow path in the first working mode.

[0093] In one feasible implementation, the control unit is configured to: calculate the difference between a preset material phase transition temperature and a first preset temperature to obtain a first temperature threshold; and calculate the sum of a preset material phase transition temperature and a second preset temperature to obtain a second temperature threshold.

[0094] The preset material phase change temperature refers to the phase change temperature at which the phase change material built into the phase change heat storage module absorbs heat. The first preset temperature can be set based on the actual application environment, and its value range is 3–5 degrees Celsius. The second preset temperature can also be set based on the actual application environment, and its value range is 3–5 degrees Celsius.

[0095] In one feasible implementation, the control unit is configured to: control the charging flow path in the second operating mode to be in a connected state via a first electronic control switch and any one of the second electronic control switches; and control the charging flow path in the first operating mode to be in a connected state via the first electronic control switch.

[0096] Specifically, based on the actual application scenario, the first terminal of the first electronic control switch can be controlled to be in a connected or disconnected state with the water inlet of the heat pump outdoor unit. Based on the actual application scenario, the second terminal of the first electronic control switch can be controlled to be in a connected or disconnected state with the first charging outlet. Based on the actual application scenario, the third terminal of the first electronic control switch can be controlled to be in a connected or disconnected state with the first terminal of any second electronic control switch. Based on the actual application scenario, the second terminal of each second electronic control switch can be controlled to be in a connected or disconnected state with the second charging outlet controlled by each second electronic control switch.

[0097] Please see Figure 3 This is a schematic diagram of the structure of a heating, ventilation, and air conditioning system provided in an embodiment of this application. Figure 3 As shown, the HVAC system may include a heat pump outdoor unit 100 and a phase change heat storage module 200, wherein,

[0098] The heat pump outdoor unit 100 includes a control unit 110, a water inlet 122, and a water outlet 124;

[0099] The phase change thermal energy storage module 200 includes a charging inlet 212, two charging outlets 214, and two third electrical control switches 242. The two charging outlets 214 are arranged alternately along the direction away from the charging inlet 212. The charging outlet farthest from the charging inlet 212 is the first charging outlet, and the charging outlet other than the first charging outlet is the second charging outlet. Each third electrical control switch 242 is used to control one charging outlet 214. The first end of each third electrical control switch 242 is connected to the charging outlet controlled by each third electrical control switch, and the second end of each third electrical control switch 242 is connected to the water inlet 124. The water outlet 124 is connected to the charging inlet 212.

[0100] Among them, the charging inlet 212 and the first charging outlet constitute the inlet and outlet of the charging flow path in the first working mode, and the charging inlet 212 and the second charging outlet constitute the inlet and outlet of the charging flow path in the second working mode.

[0101] The third electrical control switch can be an automated component used to control the on / off state of the fluid medium. For example, the third electrical control switch can be a component such as a solenoid valve.

[0102] The following is about Figure 3 The working principle of the HVAC system shown is explained below:

[0103] Specifically, the control unit is configured to: if the user sets the hot water production mode to the second working mode, control the charging flow path in the second working mode to be in a connected state, perform phase change heat storage treatment based on the charging flow path in the second working mode, monitor the inlet temperature of the heat pump outdoor unit, control the charging flow path in the first working mode to be in a connected state based on the inlet temperature, and perform phase change heat storage treatment based on the charging flow path in the first working mode.

[0104] If the user sets the hot water production mode to the first working mode, the energy charging flow path in the first working mode is kept in a connected state, and phase change heat storage treatment is performed based on the energy charging flow path in the first working mode.

[0105] In one feasible implementation, the control unit is configured to: if the inlet temperature is greater than or equal to a third temperature threshold and the third duration is greater than or equal to a third duration threshold, control the charging flow path in the first working mode to be in a connected state, and perform phase change heat storage treatment based on the charging flow path in the first working mode; wherein, the third duration is the duration during which the inlet temperature is greater than or equal to the third temperature threshold.

[0106] In one feasible implementation, the control unit is configured to: control the charging flow path in the second operating mode to be in a connected state via two third electronic control switches; and control the charging flow path in the first operating mode to be in a connected state via two third electronic control switches.

[0107] Specifically, the first charging outlet is connected to the first terminal of the third electronic control switch used to control the first charging outlet, the inlet of the heat pump outdoor unit is connected to the second terminal of the third electronic control switch used to control the first charging outlet, and the inlet of the heat pump outdoor unit is disconnected from the first terminal of the third electronic control switch used to control the second charging outlet, thus ensuring the charging flow path is connected in the first operating mode. Similarly, the second charging outlet is connected to the first terminal of the third electronic control switch used to control the second charging outlet, the inlet of the heat pump outdoor unit is connected to the second terminal of the third electronic control switch used to control the second charging outlet, and the inlet of the heat pump outdoor unit is disconnected from the first terminal of the third electronic control switch used to control the first charging outlet, thus ensuring the charging flow path is connected in the second operating mode.

[0108] In the HVAC system provided in this application embodiment, the phase change heat storage module is configured with a charging flow path having one charging inlet and two charging outlets. This allows the charging inlet and charging outlets at different locations to form charging flow paths for different operating modes of the phase change heat storage module. Thus, when the user sets the hot water production mode to the second operating mode, since the path length of the charging flow path in the second operating mode is shorter than that in the first operating mode, the charging flow path in the second operating mode is first controlled to be in a connected state, and then the charging flow path in the first operating mode is controlled to be in a connected state based on the inlet temperature of the heat pump outdoor unit. This allows the phase change material (PCM) in the shorter path length of the second operating mode to be fully utilized for heat storage during the early stages of the heat storage process. This enables the PCM to quickly store enough heat to release hot water at a certain temperature, thus improving the heat release rate of the phase change heat storage module in the early stages. Subsequently, the charging path in the first operating mode is kept connected based on the inlet temperature control of the heat pump outdoor unit. This allows all the PCM in the longest path length of the first operating mode to be fully utilized for heat storage during the middle and / or later stages of the heat storage process, storing more heat to maintain a stable hot water temperature. Therefore, this embodiment not only improves the heat release rate of the phase change heat storage module in the early stages of heat storage but also maintains a stable hot water temperature after rapid heat release.

[0109] Please see Figure 4 This is a schematic flowchart illustrating a heat storage control method provided in an embodiment of this application. This heat storage control method can be implemented using a computer program and can run on a heat storage control device based on the von Neumann architecture. The computer program can be integrated into the application or run as a standalone utility application. Specifically, this heat storage control method can be applied to HVAC systems; a schematic diagram of the HVAC system can be found here. Figure 1 or Figure 2 The structural diagram shown illustrates that, specifically, a heating, ventilation, and air conditioning system may include:

[0110] Heat pump outdoor unit;

[0111] The system includes a phase change thermal storage module with a charging flow path. The charging flow path has one charging inlet and at least two charging outlets. The at least two charging outlets are spaced apart sequentially along a direction away from the charging inlet. The charging outlet furthest from the charging inlet is the first charging outlet, and the charging outlet other than the first charging outlet is the second charging outlet. The charging inlet is connected to the outlet of the outdoor unit of the heat pump, and the second charging outlet is connected to the inlet of the outdoor unit. The first charging outlet is also connected to the inlet of the outdoor unit. The phase change thermal storage module has a first operating mode and a second operating mode. The charging inlet and the first charging outlet are in a connected state, forming the inlet and outlet of the charging flow path in the first operating mode. The charging inlet and any one of the second charging outlets form the inlet and outlet of the charging flow path in the second operating mode.

[0112] Specifically, the heat storage control method in this application embodiment may include the following steps:

[0113] S402, determine whether the user-set hot water production mode is the second working mode.

[0114] S404, if the user sets the hot water production mode to the second working mode, then control the charging flow path in the second working mode to be in a connected state, perform phase change heat storage treatment based on the charging flow path in the second working mode, monitor the inlet temperature of the heat pump outdoor unit, control the charging flow path in the first working mode to be in a connected state based on the inlet temperature, and perform phase change heat storage treatment based on the charging flow path in the first working mode.

[0115] Understandably, users can set the hot water production mode to either the first or second working mode using wired remote controls, wireless remote controls, or DIP switches.

[0116] Among them, when the phase change thermal storage module produces hot water at the same temperature, the heating time consumed by the second working mode is less than that consumed by the first working mode. The second working mode can be understood as a rapid hot water production mode, while the first working mode can be understood as a conventional hot water production mode.

[0117] The inlet temperature refers to the temperature measured by the temperature sensor installed at the inlet of the heat pump outdoor unit.

[0118] In some implementations, the user-set hot water production mode is obtained. When the hot water production mode is the second working mode, the electronic control switch between the charging inlet and the outlet of the heat pump outdoor unit can be turned on, and the electronic control switch between the second charging outlet furthest from the first charging outlet and the inlet of the heat pump outdoor unit can be turned on, so that the charging flow path in the second working mode formed by the charging inlet and the second charging outlet furthest from the first charging outlet is connected, and phase change heat storage treatment is performed based on the charging flow path in the second working mode.

[0119] Furthermore, when the inlet water temperature is detected to be greater than or equal to a third temperature threshold, and the second duration is greater than or equal to a second duration threshold, the electrical control switch between the charging inlet and the outlet of the heat pump outdoor unit can be turned on, as can the electrical control switch between the first charging outlet and the inlet of the heat pump outdoor unit, so that the charging flow path in the first working mode is connected, and phase change heat storage treatment is performed based on the charging flow path in the first working mode. The third temperature threshold can be set as the sum of the phase change temperature when the phase change material built into the phase change heat storage module absorbs heat and a second preset temperature. The second preset temperature can be set based on the actual application environment, and its range can be 3–5 degrees Celsius. The second duration refers to the duration during which the inlet water temperature is greater than or equal to the third temperature threshold.

[0120] When the inlet temperature is detected to be lower than the third temperature threshold, in a scenario where the phase change heat storage module has multiple second charging flow paths under multiple second operating modes, the electrical control switch between the charging inlet and the outlet of the heat pump outdoor unit can be turned on, and the electrical control switch between the second charging outlet, which is furthest from the first charging outlet, and the inlet of the heat pump outdoor unit can be turned on in sequence. This ensures that the charging flow path in the second operating mode formed by the inlet and the second charging outlet, which is furthest from the first charging outlet, is connected in sequence. Phase change heat storage treatment is then performed based on the charging flow path in the second operating mode formed by the second charging outlet, which is furthest from the first charging outlet, and the inlet, until the inlet temperature is detected to be greater than or equal to the third temperature threshold and the second duration is greater than or equal to the second duration threshold. At this point, the charging flow path in the first operating mode is connected, and phase change heat storage treatment is performed based on the charging flow path in the first operating mode. The second charging outlet that is second furthest from the first charging outlet includes other second charging outlets besides the second charging outlet that is furthest from the first charging outlet. For example, the second charging outlet that is second furthest from the first charging outlet may include the second charging outlet that is furthest from the first charging outlet, the third charging outlet that is furthest from the first charging outlet, the fourth charging outlet that is furthest from the first charging outlet, and so on.

[0121] Alternatively, if the inlet temperature is detected to be lower than the third temperature threshold, in a scenario where the phase change heat storage module has a second charging flow path under a second operating mode, the phase change heat storage module has one and only one second charging outlet. The electronic control switch between the charging inlet and the outlet of the heat pump outdoor unit is kept in the open state, and the electronic control switch between the second charging outlet furthest from the first charging outlet and the inlet of the heat pump outdoor unit is kept in the open state, so that the charging flow path under the second operating mode formed by the first charging outlet and the second charging outlet is in a connected state, and phase change heat storage treatment is performed based on the charging flow path under the second operating mode.

[0122] S406, if the user sets the hot water production mode to the first working mode, the energy charging flow path in the first working mode is kept in a connected state, and phase change heat storage treatment is performed based on the energy charging flow path in the first working mode.

[0123] In some implementations, the user-set hot water production mode is obtained. When the hot water production mode is the first working mode, the electronic control switch between the charging inlet and the outlet of the heat pump outdoor unit can be turned on, and the electronic control switch between the first charging outlet and the inlet of the heat pump outdoor unit can be turned on, so that the charging flow path in the first working mode formed by the charging inlet and the first charging outlet is connected, and phase change heat storage treatment is performed based on the charging flow path in the second working mode.

[0124] In the heat storage control method provided in this application embodiment, the phase change heat storage module is configured with a charging flow path having one charging inlet and at least two charging outlets. This allows the charging inlet and charging outlets at different locations to form charging flow paths under different operating modes of the phase change heat storage module. Thus, when the user sets the hot water production mode to the second operating mode, since the path length of the charging flow path in the second operating mode is shorter than that in the first operating mode, the charging flow path in the second operating mode is first controlled to be in a connected state, and then the charging flow path in the first operating mode is controlled to be in a connected state based on the inlet temperature of the heat pump outdoor unit. This configuration allows for efficient heat storage in the early stages of the heat storage process. Specifically, in the first operating mode (with a shorter path length), the phase change material (PCT) is fully utilized for heat storage, enabling it to quickly store enough heat to release hot water at a certain temperature. This improves the heat release rate of the phase change heat storage module in the early stages. Subsequently, the charging path in the first operating mode is kept connected based on the inlet temperature control of the heat pump outdoor unit. This allows for efficient heat storage in the middle and / or later stages of the heat storage process, fully utilizing all the PCT corresponding to the charging path in the first operating mode (with the longest path length), storing more heat to maintain a stable hot water temperature. Therefore, this embodiment not only improves the heat release rate of the phase change heat storage module in the early stages of heat storage but also maintains a stable hot water temperature after rapid heat release.

[0125] In one feasible implementation, the phase change thermal storage module further includes a first electronic control switch and at least one second electronic control switch. A first terminal of the first electronic control switch is connected to the water inlet of the heat pump outdoor unit, a second terminal of the first electronic control switch is connected to a first charging outlet, a third terminal of the first electronic control switch is connected to the first terminal of each of the second electronic control switches, and a second terminal of each of the second electronic control switches is connected to a second charging outlet controlled by each of the second electronic control switches. Step S404 may include:

[0126] The charging flow path in the second working mode is kept in a connected state by controlling the first electronic control switch and any one of the second electronic control switches.

[0127] The charging path in the first working mode is kept in a connected state by controlling the first electronic control switch.

[0128] Specifically, based on the actual application scenario, the first terminal of the first electronic control switch can be controlled to be in a connected or disconnected state with the water inlet of the heat pump outdoor unit. Based on the actual application scenario, the second terminal of the first electronic control switch can be controlled to be in a connected or disconnected state with the first charging outlet. Based on the actual application scenario, the third terminal of the first electronic control switch can be controlled to be in a connected or disconnected state with the first terminal of any second electronic control switch. Based on the actual application scenario, the second terminal of each second electronic control switch can be controlled to be in a connected or disconnected state with the second charging outlet controlled by each second electronic control switch.

[0129] In one feasible implementation, the phase change thermal storage module has a charging flow path with a charging inlet, a first charging outlet, and at least two second charging outlets. The second charging outlet furthest from the first charging outlet among the at least two second charging outlets is the third charging outlet. The second charging outlet other than the third charging outlet among the at least two second charging outlets is the fourth charging outlet. The charging inlet and the third charging outlet constitute the inlet and outlet of the first charging flow path in the second operating mode. The charging inlet and any one of the fourth charging outlets constitute the inlet and outlet of the second charging flow path in the second operating mode. Step S402 includes the following operational steps:

[0130] A2: If the user sets the hot water production mode to the second working mode, then the first charging flow path in the second working mode is controlled to be in a connected state, and phase change heat storage treatment is performed based on the first charging flow path in the second working mode. The inlet temperature of the heat pump outdoor unit is monitored, and the second charging flow path in the second working mode is controlled to be in a connected state based on the inlet temperature, and phase change heat storage treatment is performed based on the second charging flow path. The charging flow path in the first working mode is controlled to be in a connected state based on the inlet temperature, and phase change heat storage treatment is performed based on the charging flow path in the first working mode.

[0131] Specifically, step A2 includes the following steps:

[0132] a2: If the inlet temperature is greater than or equal to the first temperature threshold and the first duration is greater than or equal to the first duration threshold, then the third charging flow path is controlled to be in a connected state, and phase change heat storage treatment is performed based on the third charging flow path. The third charging flow path is the second charging flow path closest to the first charging flow path in the second working mode.

[0133] In step a2, the first temperature threshold is calculated by calculating the difference between the preset material phase change temperature and the first preset temperature to obtain the first temperature threshold. The third charging flow path is controlled to be in a connected state, and phase change heat storage treatment is performed based on the third charging flow path. This step can be implemented as follows: the first terminal of the first electronic control switch is connected to the water inlet of the heat pump outdoor unit; the second terminal of the first electronic control switch is disconnected; the third terminal of the first electronic control switch is disconnected from the first terminal of the second electronic control switch used to control the third charging outlet; the third terminal of the first electronic control switch is connected to the first terminal of the fourth charging outlet constituting the third charging flow path; and the fourth charging outlet constituting the third charging flow path is connected to the second terminal of the second electronic control switch used to control the fourth charging outlet constituting the third charging flow path, so that the third charging flow path is in a connected state, and phase change heat storage treatment is performed through the phase change material corresponding to the third charging flow path.

[0134] a4: Monitor the temperature increase value of the inlet water temperature. If the temperature increase value is the second temperature threshold and the inlet water temperature after the temperature rise is less than the third temperature threshold, then control the second charging flow path other than the third charging flow path to be in a connected state in sequence, and perform phase change heat storage treatment based on the second charging flow path other than the third charging flow path in sequence.

[0135] In step a4, the second temperature threshold is calculated by summing the preset material phase transition temperature and the second preset temperature to obtain the second temperature threshold.

[0136] The temperature increase refers to the monitored rise in inlet temperature during each switch to a new charging flow path for phase change thermal storage. The third flow path is the newly switched charging flow path. Before phase change thermal storage based on the third charging flow path, the latest monitored inlet temperature is denoted as T1. During phase change thermal storage based on the third charging flow path, the latest monitored inlet temperature is denoted as T2. T2 is greater than T1, and the difference between T2 and T1 is the temperature increase. The inlet temperature after the temperature increase refers to the latest inlet temperature when the monitored temperature increase reaches the second temperature threshold.

[0137] The specific implementation of step a4 can be as follows: monitor the temperature increase value of the inlet water temperature according to the preset temperature monitoring frequency. Since the number of second charging flow paths in the second working mode is at least one, when the number of second charging flow paths in the second working mode is at least two, the second charging flow path closest to the first charging flow path in the second working mode is the third charging flow path. Then, the second charging flow path in the second working mode can include the third charging flow path and at least two second charging flow paths other than the third charging flow path. The at least two second charging flow paths other than the third charging flow path can include a second second charging flow path far away from the first charging flow path, a third second charging flow path far away from the first charging flow path, a fourth third charging flow path far away from the first charging flow path, and so on. During each switch to a new charging flow path for phase change heat storage, for example, when switching to the third charging flow path, if the detected temperature increase reaches the second temperature threshold and the inlet temperature after the temperature increase is still lower than the third temperature threshold, the first terminal of the first electronic control switch can be connected to the inlet of the heat pump outdoor unit, the third terminal of the first electronic control switch can be disconnected from the first terminal of the fourth charging outlet constituting the third charging flow path, the third terminal of the first electronic control switch can be connected to the fourth charging outlet constituting the second charging flow path (away from the first charging flow path), and the fourth charging outlet constituting the second charging flow path (away from the first charging flow path) can be connected to the second terminal of the second electronic control switch, so that... The second charging flow path, which is farthest from the first charging flow path, is in a connected state, and phase change heat storage treatment is performed through the phase change material corresponding to the second charging flow path, which is farthest from the first charging flow path. Similarly, when switching to the second charging flow path, which is farthest from the first charging flow path, for phase change heat storage treatment, if the monitored temperature increase value is the second temperature threshold and the inlet temperature after the temperature increase is still less than the third temperature threshold, the third charging flow path, which is farthest from the first charging flow path, can be controlled to be in a connected state in the same way as the second charging flow path, which is farthest from the first charging flow path, and phase change heat storage treatment is performed through the phase change heat storage material corresponding to the third charging flow path, which is farthest from the first charging flow path. Similarly, the subsequent process of switching to the fourth charging flow path, which is farthest from the first charging flow path, for phase change heat storage treatment can refer to the above description and will not be detailed here.

[0138] a6: If the inlet temperature is greater than or equal to the third temperature threshold and the second duration is greater than or equal to the second duration threshold, then the charging flow path in the first working mode is controlled to be in a connected state, and phase change heat storage treatment is performed based on the charging flow path in the first working mode.

[0139] The first duration is the duration during which the inlet water temperature is greater than or equal to the first temperature threshold, and the second duration is the duration during which the inlet water temperature is greater than or equal to the third temperature threshold.

[0140] The specific implementation method of step a6 can be as follows: control the first end of the first electronic control switch to be connected to the water inlet of the heat pump outdoor unit, control the second end of the first electronic control switch to be connected to the first charging outlet, and control the third end of the first electronic control switch to be disconnected, so that the charging flow path in the first working mode is connected, and phase change heat storage treatment is performed through the phase change material of the full capacity corresponding to the charging flow path in the first working mode.

[0141] In one feasible implementation, the phase change thermal storage module has a charging flow path with a charging inlet, a first charging outlet, and a second charging outlet. Step S404 may include the following operation steps:

[0142] If the inlet temperature is greater than or equal to the third temperature threshold and the third duration is greater than or equal to the third duration threshold, then the charging flow path in the first working mode is controlled to be in a connected state, and phase change heat storage treatment is performed based on the charging flow path in the first working mode.

[0143] The third duration is the duration during which the inlet water temperature is greater than or equal to the third temperature threshold.

[0144] In one feasible implementation, the heat storage control method of this application embodiment can be applied to... Figure 3 The HVAC system shown, specifically, when the phase change heat storage module has a charging flow path with one charging inlet and two charging outlets, the phase change heat storage module includes two third electronic control switches. The first terminal of each third electronic control switch is connected to the charging outlet controlled by each third electronic control switch, and the second terminal of each third electronic control switch is connected to the water inlet of the heat pump outdoor unit; step S404 may include:

[0145] The charging flow path in the second working mode is kept in a connected state by controlling two third electronic control switches.

[0146] The charging flow path in the first working mode is kept connected by two third electronic control switches.

[0147] Specifically, the first charging outlet is connected to the first terminal of the third electronic control switch used to control the first charging outlet, the inlet of the heat pump outdoor unit is connected to the second terminal of the third electronic control switch used to control the first charging outlet, and the inlet of the heat pump outdoor unit is disconnected from the first terminal of the third electronic control switch used to control the second charging outlet, thus ensuring the charging flow path is connected in the first operating mode. Similarly, the second charging outlet is connected to the first terminal of the third electronic control switch used to control the second charging outlet, the inlet of the heat pump outdoor unit is connected to the second terminal of the third electronic control switch used to control the second charging outlet, and the inlet of the heat pump outdoor unit is disconnected from the first terminal of the third electronic control switch used to control the first charging outlet, thus ensuring the charging flow path is connected in the second operating mode.

[0148] The heat storage control method provided in this application configures the phase change heat storage module's charging flow path to have one charging inlet and at least two charging outlets. This allows the charging inlet and charging outlets at different locations to form charging flow paths for different operating modes of the phase change heat storage module. Thus, when the user sets the hot water production mode to the second operating mode, since the path length of the charging flow path in the second operating mode is shorter than that in the first operating mode, the charging flow path in the second operating mode is first controlled to be in a connected state, and then the charging flow path in the first operating mode is controlled to be in a connected state based on the inlet temperature of the heat pump outdoor unit. This design allows the phase change material (PCT) in the second operating mode (with a shorter path length) to be fully utilized for heat storage during the early stages of the heat storage process. This enables the PCT to quickly store enough heat to release hot water at a certain temperature, thus improving the heat release rate of the phase change heat storage module in the early stages. Subsequently, the charging path in the first operating mode is kept connected based on the inlet temperature control of the heat pump outdoor unit. This allows the entire PCT corresponding to the charging path in the first operating mode (with the longest path length) to be fully utilized for heat storage during the middle and / or later stages of the heat storage process, storing more heat to maintain a stable hot water temperature. Therefore, this embodiment not only improves the heat release rate of the phase change heat storage module in the early stages of heat storage but also maintains a stable hot water temperature after rapid heat release.

[0149] The following will combine Figure 5 This application provides a detailed description of the heat storage control device provided in its embodiments. It should be noted that... Figure 5 The heat storage control device shown is used to execute the method of one or more embodiments shown in this application. For ease of explanation, only the parts related to the embodiments of this application are shown. For specific technical details not disclosed, please refer to one or more embodiments shown in this application.

[0150] Please see Figure 5This diagram illustrates the structure of a heat storage control device according to an embodiment of this application. The heat storage control device 1 can be implemented as all or part of a device through software, hardware, or a combination of both. The heat storage control device 1 is applied to a heating, ventilation, and air conditioning (HVAC) system, which includes a heat pump outdoor unit, and the heat pump outdoor unit includes a control unit.

[0151] The system includes a phase change thermal storage module with a charging flow path. The charging flow path has one charging inlet and at least two charging outlets. The at least two charging outlets are arranged alternately along the direction away from the charging inlet. The charging outlet furthest from the charging inlet among the at least two charging outlets is the first charging outlet. The charging outlet other than the first charging outlet among the at least two charging outlets is the second charging outlet. The charging inlet is connected to the water outlet of the heat pump outdoor unit, the second charging outlet is connected to the water inlet of the heat pump outdoor unit, and the first charging outlet is connected to the water inlet of the heat pump outdoor unit. The phase change thermal storage module has a first operating mode and a second operating mode. The charging inlet and the first charging outlet constitute the inlet and outlet of the charging flow path in the first operating mode. The charging inlet and any one of the second charging outlets constitute the inlet and outlet of the charging flow path in the second operating mode.

[0152] According to some embodiments, the heat storage control device 1 includes a first heat storage control module 11 and a second heat storage control module 12, specifically used for:

[0153] The first heat storage control module 11 is used to control the charging flow path in the second working mode to be in a connected state if the user sets the hot water production mode to the second working mode, perform phase change heat storage treatment based on the charging flow path in the second working mode, monitor the inlet temperature of the heat pump outdoor unit, control the charging flow path in the first working mode to be in a connected state based on the inlet temperature, and perform phase change heat storage treatment based on the charging flow path in the first working mode.

[0154] The second heat storage control module 12 is used to control the energy-charging flow path in the first working mode to be in a connected state if the user sets the hot water production mode to the first working mode, and to perform phase change heat storage treatment based on the energy-charging flow path in the first working mode.

[0155] It should be noted that the thermal storage control device provided in the above embodiments is only illustrated by the division of the above functional modules when executing the thermal storage control method. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. In addition, the thermal storage control device and the thermal storage control method embodiments provided in the above embodiments belong to the same concept, and the implementation process is detailed in the method embodiments, which will not be repeated here.

[0156] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0157] This application also provides a computer storage medium that can store multiple instructions, which are adapted to be loaded and executed by a processor as described above. Figure 4 The heat storage control method of the illustrated embodiment can be found in the following document for detailed execution process: Figure 4 The specific details of the illustrated embodiments will not be elaborated here.

[0158] This application also provides a computer program product storing at least one instruction, which is loaded and executed by the processor as described above. Figure 4 The heat storage control method of the illustrated embodiment can be found in the following document for detailed execution process: Figure 4 The specific details of the illustrated embodiments will not be elaborated here.

[0159] Please refer to Figure 6 This is a structural block diagram of an electronic device provided in an embodiment of this specification. The electronic device in this specification may include one or more of the following components: a processor 110, a memory 120, an input device 130, an output device 140, and a bus 150. The processor 110, memory 120, input device 130, and output device 140 can be connected via the bus 150.

[0160] Processor 110 may include one or more processing cores. Processor 110 connects to various parts of the electronic device via various interfaces and lines, and performs various functions and processes data of electronic device 100 by running or executing instructions, programs, code sets, or instruction sets stored in memory 120, and by calling data stored in memory 120. Optionally, processor 110 may be implemented using at least one hardware form of digital signal processing (DSP), field-programmable gate array (FPGA), or programmable logic array (PLA). Processor 110 may integrate one or more of the following: central processing unit (CPU), graphics processing unit (GPU), and modem. The CPU primarily handles the operating system, user interface, and applications; the GPU is responsible for rendering and drawing the displayed content; and the modem handles wireless communication. It is understood that the modem may also not be integrated into processor 110 and may be implemented separately through a communication chip.

[0161] The memory 120 may include random access memory (RAM) or read-only memory (ROM). Optionally, the memory 120 may include non-transitory computer-readable storage medium. The memory 120 may be used to store instructions, programs, code, code sets, or instruction sets.

[0162] The input device 130 is used to receive input instructions or data, and the input device 130 includes, but is not limited to, a keyboard, mouse, camera, microphone, or touch device. The output device 140 is used to output instructions or data, and the output device 140 includes, but is not limited to, display devices and speakers.

[0163] In addition, those skilled in the art will understand that the structure of the electronic device shown in the above figures does not constitute a limitation on the electronic device. The electronic device may include more or fewer components than shown, or combine certain components, or have different component arrangements. For example, the electronic device may also include radio frequency circuits, input units, sensors, audio circuits, wireless fidelity (WIFI) modules, power supplies, Bluetooth modules, etc., which will not be described in detail here.

[0164] In the embodiments of this application, the executing entity for each step can be the electronic device described above. Optionally, the executing entity for each step is the operating system of the electronic device. The operating system can be Android, iOS, or other operating systems; this embodiment of the application does not limit this.

[0165] exist Figure 6 In the electronic device, the processor 110 can be used to call a program stored in the memory 120 and execute it to implement the heat storage control method as described in the various method embodiments of this application.

[0166] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. The storage medium can be a magnetic disk, optical disk, read-only memory, or random access memory, etc.

[0167] The above-disclosed embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of this application. Therefore, any equivalent variations made in accordance with the claims of this application shall still fall within the scope of this application.

Claims

1. A heating, ventilation, and air conditioning system, comprising: The HVAC system includes: A heat pump outdoor unit, the heat pump outdoor unit including a control unit; The system includes a phase change thermal energy storage module with a charging flow path. The charging flow path has one charging inlet and at least two charging outlets. The at least two charging outlets are sequentially spaced apart along a direction away from the charging inlet. The charging outlet furthest from the charging inlet is the first charging outlet, and the charging outlet other than the first charging outlet is the second charging outlet. The charging inlet is connected to the outlet of the outdoor unit of the heat pump, and the second charging outlet is connected to the inlet of the outdoor unit. The first charging outlet is also connected to the inlet of the outdoor unit. The phase change thermal energy storage module has a first operating mode and a second operating mode. The charging inlet and the first charging outlet constitute the inlet and outlet of the charging flow path in the first operating mode, and the charging inlet and any one of the second charging outlets constitute the inlet and outlet of the charging flow path in the second operating mode. The capacity of the phase change material corresponding to the charging flow path in the first operating mode is greater than the capacity of the phase change material corresponding to any charging flow path in the second operating mode. The control unit is configured to: If the user sets the hot water production mode to the second working mode, the charging flow path in the second working mode is controlled to be in a connected state, and phase change heat storage treatment is performed based on the charging flow path in the second working mode. The inlet temperature of the heat pump outdoor unit is monitored, and the charging flow path in the first working mode is controlled to be in a connected state based on the inlet temperature, and phase change heat storage treatment is performed based on the charging flow path in the first working mode. If the user sets the hot water production mode to the first working mode, the energy charging flow path in the first working mode is kept in a connected state, and phase change heat storage treatment is performed based on the energy charging flow path in the first working mode.

2. The heating system of claim 1, wherein, The charging flow path has a charging inlet, a first charging outlet, and at least two second charging outlets. The second charging outlet furthest from the first charging outlet among the at least two second charging outlets is the third charging outlet. The second charging outlet other than the third charging outlet among the at least two second charging outlets is the fourth charging outlet. The charging inlet and the third charging outlet constitute the inlet and outlet of the first charging flow path in the second operating mode. The charging inlet and any one of the fourth charging outlets constitute the inlet and outlet of the second charging flow path in the second operating mode.

3. The heating system of claim 2, wherein, The control unit is configured to: If the user sets the hot water production mode to the second working mode, then the first charging flow path in the second working mode is controlled to be in a connected state, and phase change heat storage treatment is performed based on the first charging flow path in the second working mode. The inlet temperature of the heat pump outdoor unit is monitored, and based on the inlet temperature, the second charging flow path in the second working mode is controlled to be in a connected state, and phase change heat storage treatment is performed based on the second charging flow path. Based on the inlet temperature, the charging flow path in the first working mode is controlled to be in a connected state, and phase change heat storage treatment is performed based on the charging flow path in the first working mode.

4. The HVAC system according to claim 3, characterized in that, The control unit is configured to: If the inlet temperature is greater than or equal to the first temperature threshold and the first duration is greater than or equal to the first duration threshold, then the third charging flow path is controlled to be in a connected state, and phase change heat storage treatment is performed based on the third charging flow path. The third charging flow path is the second charging flow path closest to the first charging flow path in the second working mode. The temperature increase of the inlet temperature is monitored. If the temperature increase is the second temperature threshold and the inlet temperature after the temperature rise is less than the third temperature threshold, then the second charging flow path other than the third charging flow path is controlled to be in a connected state, and phase change heat storage treatment is performed based on the second charging flow path other than the third charging flow path. If the inlet temperature is greater than or equal to the third temperature threshold and the second duration is greater than or equal to the second duration threshold, then the charging flow path in the first working mode is controlled to be in a connected state, and phase change heat storage treatment is performed based on the charging flow path in the first working mode. Wherein, the first duration is the duration during which the inlet temperature is greater than or equal to the first temperature threshold, and the second duration is the duration during which the inlet temperature is greater than or equal to the third temperature threshold.

5. The HVAC system according to claim 4, characterized in that, The control unit is configured to: The difference between the preset material phase transition temperature and the first preset temperature is calculated to obtain the first temperature threshold. The sum of the preset material phase transition temperature and the second preset temperature is calculated to obtain the second temperature threshold.

6. The HVAC system according to claim 1, characterized in that, The charging flow path has a charging inlet, a first charging outlet, and a second charging outlet. The control unit is configured to: If the inlet temperature is greater than or equal to the third temperature threshold and the third duration is greater than or equal to the third duration threshold, then the charging flow path in the first working mode is controlled to be in a connected state, and phase change heat storage treatment is performed based on the charging flow path in the first working mode. The third duration is the duration during which the inlet water temperature is greater than or equal to a third temperature threshold.

7. The HVAC system according to claim 1, characterized in that, The phase change heat storage module further includes a first electronic control switch and at least one second electronic control switch. The first end of the first electronic control switch is connected to the water inlet of the heat pump outdoor unit, the second end of the first electronic control switch is connected to the first charging outlet, the third end of the first electronic control switch is connected to the first end of each of the second electronic control switches, and the second end of each of the second electronic control switches is connected to the second charging outlet controlled by each of the second electronic control switches.

8. The HVAC system according to claim 7, characterized in that, The control unit is configured to: The charging flow path in the second working mode is kept in a connected state by controlling the first electronic control switch and any one of the second electronic control switches. The first electronic control switch controls the charging flow path in the first working mode to be in a connected state.

9. The HVAC system according to claim 1, characterized in that, When the charging flow path has one charging inlet and two charging outlets, the phase change heat storage module includes two third electronic control switches. The first end of each third electronic control switch is connected to the charging outlet controlled by each third electronic control switch, and the second end of each third electronic control switch is connected to the water inlet of the heat pump outdoor unit.

10. The HVAC system according to claim 9, characterized in that, The control unit is configured to: The charging flow path in the second working mode is kept in a connected state by the two third electronic control switches. The charging flow path in the first working mode is kept in a connected state by the two third electronic control switches.

11. A method for controlling heat storage, characterized in that, Applied to HVAC systems, the HVAC system comprising: Heat pump outdoor unit; The system includes a phase change thermal energy storage module with a charging flow path. The charging flow path has one charging inlet and at least two charging outlets. The at least two charging outlets are sequentially spaced apart along a direction away from the charging inlet. The charging outlet furthest from the charging inlet is the first charging outlet, and the charging outlet other than the first charging outlet is the second charging outlet. The charging inlet is connected to the outlet of the outdoor unit of the heat pump, and the second charging outlet is connected to the inlet of the outdoor unit. The first charging outlet is also connected to the inlet of the outdoor unit. The phase change thermal energy storage module has a first operating mode and a second operating mode. The charging inlet and the first charging outlet are in a connected state, forming the inlet and outlet of the charging flow path in the first operating mode. The charging inlet and any one of the second charging outlets form the inlet and outlet of the charging flow path in the second operating mode. The capacity of the phase change material corresponding to the charging flow path in the first operating mode is greater than the capacity of the phase change material corresponding to any charging flow path in the second operating mode. The method includes: If the user sets the hot water production mode to the second working mode, the charging flow path in the second working mode is controlled to be in a connected state, and phase change heat storage treatment is performed based on the charging flow path in the second working mode. The inlet temperature of the heat pump outdoor unit is monitored, and the charging flow path in the first working mode is controlled to be in a connected state based on the inlet temperature, and phase change heat storage treatment is performed based on the charging flow path in the first working mode. If the user sets the hot water production mode to the first working mode, the energy charging flow path in the first working mode is kept in a connected state, and phase change heat storage treatment is performed based on the energy charging flow path in the first working mode.

12. A computer storage medium, characterized in that, The computer storage medium stores a plurality of instructions adapted for loading by a processor and executing the method as described in claim 11.

13. An electronic device, characterized in that, include: A processor and a memory; wherein the memory stores a computer program adapted to be loaded by the processor and executed as described in claim 11.

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