Heating, ventilation and air conditioning system, heat storage control method, storage medium and electronic device

Abstract

Provided are a heating, ventilation and air conditioning system, a heat storage control method, a storage medium and an electronic device. The heating, ventilation and air conditioning system comprises a heat pump outdoor unit (100) and a phase-change heat storage module (200), wherein an energy charging flow path of the phase-change heat storage module (200) has one energy charging inlet (212) and at least two energy charging outlets (214); the at least two energy charging outlets (214) are sequentially arranged spaced part from each other in a direction away from the energy charging inlet (212); among the at least two energy charging outlets (214), the energy charging outlet (214) which is the farthest away from the energy charging inlet (212) is a first energy charging outlet; among the at least two energy charging outlets (214), the energy charging outlets (214) other than the first energy charging outlet are second energy charging outlets; the energy charging inlet (212) is connected to a water outlet (124) of the heat pump outdoor unit (100); the second energy charging outlets are connected to a water inlet (122) of the heat pump outdoor unit (100); the first energy charging outlet is connected to the water inlet (122) of the heat pump outdoor unit (100); and the energy charging inlet (212) and the first energy charging outlet form an inlet and an outlet of the energy charging flow path in a first operating mode of the phase-change heat storage module (200), and the energy charging inlet (212) and any one of the second energy charging outlets form an inlet and an outlet of the energy charging flow path in a second operating mode of the phase-change heat storage module (200).

Description

HVAC systems, thermal storage control methods, storage media and electronic equipment

[0001] This application claims priority to Chinese patent application filed on October 16, 2024, application number 2024114487331, entitled "Heating, Ventilation and Air Conditioning System, Thermal Storage Control Method, Storage Medium and Electronic Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] 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

[0003] 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 exemplary 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.

[0004] 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.

[0005] Application content

[0006] 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:

[0007] In a first aspect, embodiments of this application provide a heating, ventilation, and air conditioning (HVAC) system, the HVAC system comprising:

[0008] A heat pump outdoor unit, the heat pump outdoor unit including a control unit;

[0009] 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.

[0010] The control unit is configured to:

[0011] 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.

[0012] 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.

[0013] In some exemplary embodiments, 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.

[0014] In some exemplary embodiments, the control unit is configured to:

[0015] 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.

[0016] In some exemplary embodiments, the control unit is configured to:

[0017] 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.

[0018] The temperature increase of the inlet water temperature is monitored. If the temperature increase is 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 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.

[0019] 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.

[0020] 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.

[0021] In some exemplary embodiments, the control unit is configured to:

[0022] The difference between the preset material phase transition temperature and the first preset temperature is calculated to obtain the first temperature threshold.

[0023] The sum of the preset material phase transition temperature and the second preset temperature is calculated to obtain the third temperature threshold.

[0024] In some exemplary embodiments, the charging flow path has a charging inlet, a first charging outlet, and a second charging outlet, and the control unit is configured to:

[0025] 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.

[0026] The third duration is the duration during which the inlet water temperature is greater than or equal to the third temperature threshold.

[0027] In some exemplary embodiments, 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 outdoor unit of the heat pump, 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.

[0028] In some exemplary embodiments, the control unit is configured to:

[0029] 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.

[0030] The first electronic control switch controls the charging flow path in the first working mode to be in a connected state.

[0031] In some exemplary embodiments, 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.

[0032] In some exemplary embodiments, the control unit is configured to:

[0033] The charging flow path in the second working mode is kept in a connected state by the two third electronic control switches.

[0034] The charging path in the first working mode is kept in a connected state by the two third electronic control switches.

[0035] Secondly, embodiments of this application provide another heating, ventilation, and air conditioning (HVAC) system, the HVAC system comprising:

[0036] A heat pump outdoor unit, the heat pump outdoor unit including a control unit;

[0037] The system includes a phase change heat storage module, which has a charging flow path. The charging flow path has at least two pairs of reference charging inlets and reference charging outlets. Each pair of reference charging inlets and reference charging outlets constitutes a sub-charging flow path. The reference charging inlet of each sub-charging flow path is connected to the outlet of the outdoor unit of the heat pump, and the reference charging outlet of each sub-charging flow path 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. A first number of sub-charging flow paths constitute the charging flow path in the first operating mode, and a second number of sub-charging flow paths constitute the charging flow path in the second operating mode. The first number is the total number of all sub-charging flow paths, and the second number is less than the first number.

[0038] The control unit is configured to:

[0039] 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.

[0040] 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.

[0041] In some exemplary embodiments, the second quantity includes a preset quantity and at least one third quantity, each of the third quantities being greater than the preset quantity, the sub-charging flow paths of the preset quantity constituting a first reference charging flow path in the second operating mode, and the sub-charging flow paths of the third quantity constituting a second reference charging flow path in the second operating mode.

[0042] In some exemplary embodiments, the control unit is configured to:

[0043] If the user sets the hot water production mode to the second working mode, then the first reference 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 reference charging flow path in the second working mode. The inlet temperature of the heat pump outdoor unit is monitored, and the second reference charging flow path in the second working mode is controlled to be in a connected state based on the inlet temperature. Phase change heat storage treatment is performed based on the second reference charging flow path in the second working mode. 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.

[0044] In some exemplary embodiments, the control unit is configured to:

[0045] 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 reference charging flow path is controlled to be in a connected state, and phase change heat storage treatment is performed based on the third reference charging flow path. The third reference charging flow path is the second reference charging flow path composed of the fourth number of the sub-charging flow paths in the second working mode. The fourth number is the third number closest to the preset number.

[0046] The temperature increase of the inlet temperature is monitored. If the temperature increase is equal to the second temperature threshold and the inlet temperature after the temperature rise is less than the third temperature threshold, then the second reference charging flow path other than the third reference charging flow path is sequentially controlled to be in a connected state, and phase change heat storage treatment is sequentially performed based on the second reference charging flow path other than the third reference charging flow path.

[0047] 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.

[0048] 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.

[0049] In some exemplary embodiments, the control unit is configured to:

[0050] The difference between the preset material phase transition temperature and the first preset temperature is calculated to obtain the first temperature threshold.

[0051] The sum of the preset material phase transition temperature and the second preset temperature is calculated to obtain the third temperature threshold.

[0052] In some exemplary embodiments, the second quantity is a preset quantity, and the control unit is configured to:

[0053] 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.

[0054] The third duration is the duration during which the inlet water temperature is greater than or equal to the third temperature threshold.

[0055] In some exemplary embodiments, the phase change thermal storage module further includes a first control switch and at least one second control switch. A first end of the first control switch is connected to the water inlet of the heat pump outdoor unit, a second end of the first control switch is connected to a reference charging outlet of a first sub-charging flow path, and a third end of the first control switch is connected to a reference charging outlet of a second sub-charging flow path. The first sub-charging flow path is the sub-charging flow path closest to the water inlet of the heat pump outdoor unit, and the second sub-charging flow path is any sub-charging flow path other than the first sub-charging flow path. A first end of each second control switch is connected to the water outlet of the heat pump outdoor unit, and a second end of each second control switch is connected to the charging inlet of a third sub-charging flow path. The third sub-charging flow path includes any sub-charging flow path other than the first sub-charging flow path and the second sub-charging flow path, except for the fourth sub-charging flow path. The fourth sub-charging flow path is the sub-charging flow path furthest from the water inlet of the heat pump outdoor unit.

[0056] In some exemplary embodiments, the control unit is configured to:

[0057] The first control switch and the second control switch control the charging flow path in the second working mode to be in a connected state, and control the charging flow path in the first working mode to be in a connected state.

[0058] In some exemplary embodiments, when the charging flow path has two pairs of reference charging inlets and reference charging outlets, the phase change thermal storage module includes a third control switch and two fourth control switches; the first end of the third control switch is connected to the outlet of the heat pump outdoor unit, and the second end of the third control switch is connected to the reference charging inlet of the sub-charging flow path closest to the inlet of the heat pump outdoor unit; the first end of each of the fourth control switches is connected to the reference charging outlet of each of the sub-charging flow paths, and the second end of each of the fourth control switches is connected to the inlet of the heat pump outdoor unit.

[0059] In some exemplary embodiments, the control unit is configured to:

[0060] The third control switch and the fourth control switch control the charging flow path in the second working mode to be in a connected state, and control the charging flow path in the first working mode to be in a connected state.

[0061] Thirdly, embodiments of this application provide a heat storage control method applied to a heating, ventilation, and air conditioning (HVAC) system, the HVAC system comprising:

[0062] Heat pump outdoor unit;

[0063] 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.

[0064] The method includes:

[0065] 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.

[0066] 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.

[0067] Fourthly, embodiments of this application provide another heat storage control method applied to a heating, ventilation, and air conditioning (HVAC) system, the HVAC system comprising:

[0068] A heat pump outdoor unit, the heat pump outdoor unit including a control unit;

[0069] The system includes a phase change heat storage module, which has a charging flow path. The charging flow path has at least two pairs of reference charging inlets and reference charging outlets. Each pair of reference charging inlets and reference charging outlets constitutes a sub-charging flow path. The charging inlet of each sub-charging flow path is connected to the outlet of the outdoor unit of the heat pump, and the charging outlet of each sub-charging flow path 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. A first number of sub-charging flow paths constitute the charging flow path in the first operating mode, and a second number of sub-charging flow paths constitute the charging flow path in the second operating mode. The first number is the total number of all sub-charging flow paths, and the second number is less than the first number.

[0070] The method includes:

[0071] 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.

[0072] 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.

[0073] Fifthly, embodiments of this application provide a computer storage medium having multiple instructions adapted for loading by a processor and executing the methods described above.

[0074] Sixthly, embodiments of this application provide a heating device, which may include: a memory and a processor; wherein the memory stores a computer program adapted to be loaded by the memory and execute the above-described method.

[0075] This application provides a heating, ventilation, and air conditioning (HVAC) system that may include a heat pump outdoor unit and a phase change thermal storage module. By configuring the charging flow path of the phase change thermal storage module to have one charging inlet and at least two charging outlets, the charging inlet and charging outlets at different locations can form charging flow paths for different operating modes of the phase change thermal 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 based on the inlet temperature of the heat pump outdoor unit. With the energy flow path in a connected state, in the early stages of the heat storage process, the phase change material corresponding to the charging flow path in the second operating 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 stages of heat storage. Subsequently, based on the inlet temperature control of the heat pump outdoor unit, the charging flow path in the first operating mode is kept connected. 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 operating mode (with the longest path length) can be fully utilized for heat storage, storing more heat to maintain a stable hot water temperature. Therefore, the embodiments of this application not only improve the heat release rate of the phase change heat storage module in the early stages of heat storage, but also maintain a stable hot water temperature after the hot water releases rapidly.

[0076] Another 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 at least two pairs of reference energy-charging inlets and outlets, each pair of reference energy-charging inlets and outlets constitutes a sub-energy-charging flow path. This allows these sub-energy-charging flow paths to form the energy-charging flow path in 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 number of sub-energy-charging flow paths in the second operating mode is less than the number in the first operating mode, by first controlling the energy-charging flow path in the second operating mode to be in a connected state, and then based on the inlet temperature of the heat pump outdoor unit... By controlling the charging flow path in the first operating mode to be in a connected state, the phase change material corresponding to a smaller number of sub-charging flow paths in the second operating mode can be fully utilized for heat storage in the early stage of the heat storage process. This allows some phase change material 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 stage of heat storage. Subsequently, by controlling the inlet temperature of the heat pump outdoor unit to keep the charging flow path in the first operating mode in a connected state, the entire phase change material corresponding to all sub-charging flow paths in the first operating mode can be fully utilized for heat storage in the middle and / or later stages of the heat storage process, 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

[0077] To more clearly illustrate the technical solutions in the embodiments of this application 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 this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0078] Figure 1 is a schematic diagram of a heating, ventilation and air conditioning system provided in an embodiment of this application;

[0079] Figure 2 is a schematic diagram of another HVAC system provided in an embodiment of this application;

[0080] Figure 3 is a structural schematic diagram of another HVAC system provided in an embodiment of this application;

[0081] Figure 4 is a structural schematic diagram of another HVAC system provided in an embodiment of this application;

[0082] Figure 5 is a structural schematic diagram of another HVAC system provided in an embodiment of this application;

[0083] Figure 6 is a schematic diagram of another HVAC system provided in an embodiment of this application;

[0084] Figure 7 is a schematic flowchart of a heat storage control method provided in an embodiment of this application;

[0085] Figure 8 is a schematic diagram of a heat storage control device provided in an embodiment of this application;

[0086] Figure 9 is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0087] 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.

[0088] 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.

[0089] The present application will now be described in detail with reference to specific embodiments.

[0090] Please refer to Figure 1, which is a structural schematic diagram of a heating, ventilation, and air conditioning (HVAC) system provided in an embodiment of this application. As shown in Figure 1, the HVAC system may include a heat pump outdoor unit 100 and a phase change heat storage module 200, wherein...

[0091] The heat pump outdoor unit 100 includes a control unit 110, a water inlet 122, and a water outlet 124;

[0092] 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.

[0093] 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.

[0094] 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.

[0095] 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.

[0096] 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. In one embodiment, 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 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.

[0097] 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.

[0098] The working principle of the HVAC system shown in Figure 1 is explained below:

[0099] In one embodiment, 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.

[0100] 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.

[0101] 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.

[0102] The inlet temperature refers to the temperature measured by the temperature sensor installed at the inlet of the heat pump outdoor unit.

[0103] 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.

[0104] 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.

[0105] 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.

[0106] 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.

[0107] 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:

[0108] 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.

[0109] 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.

[0110] Please refer to Figure 2, which is a structural schematic diagram of a heating, ventilation, and air conditioning (HVAC) system provided in an embodiment of this application. As shown in Figure 2, the HVAC system may include a heat pump outdoor unit 100 and a phase change heat storage module 200, wherein...

[0111] The heat pump outdoor unit 100 includes a control unit 110, a water inlet 122, and a water outlet 124;

[0112] 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.

[0113] 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.

[0114] 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.

[0115] 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.

[0116] The working principle of the HVAC system shown in Figure 2 is explained below:

[0117] 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.

[0118] 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.

[0119] 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.

[0120] 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 connected, and phase change heat storage treatment is performed based on the second charging flow path.

[0121] 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.

[0122] 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.

[0123] 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.

[0124] 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.

[0125] The second temperature threshold can be set to a fixed value, for example, the second temperature threshold can be set to 2 degrees Celsius.

[0126] 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.

[0127] 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 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 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 second terminal of the second electronic control switch can be connected to the fourth charging outlet constituting the second charging flow path away from the first charging flow path, so that the second charging outlet constituting the second charging flow path away from the first charging flow path is connected to the second terminal of the second electronic control switch constituting the fourth charging outlet constituting the second charging flow path away from the first charging flow path. 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.

[0128] 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.

[0129] 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.

[0130] 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 third temperature threshold.

[0131] 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.

[0132] 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.

[0133] 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.

[0134] Please refer to Figure 3, which is a structural schematic diagram of a heating, ventilation, and air conditioning (HVAC) system provided in an embodiment of this application. As shown in Figure 3, the HVAC system may include a heat pump outdoor unit 100 and a phase change heat storage module 200, wherein...

[0135] The heat pump outdoor unit 100 includes a control unit 110, a water inlet 122, and a water outlet 124;

[0136] 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.

[0137] 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.

[0138] 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.

[0139] The working principle of the HVAC system shown in Figure 3 is explained below:

[0140] 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.

[0141] 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.

[0142] 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.

[0143] 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.

[0144] 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.

[0145] 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.

[0146] Please refer to Figure 4, which is a structural schematic diagram of a heating, ventilation, and air conditioning (HVAC) system provided in an embodiment of this application. As shown in Figure 4, the HVAC system may include a heat pump outdoor unit 100 and a phase change heat storage module 200.

[0147] The heat pump outdoor unit 100 includes a control unit 110, a water inlet 122, and a water outlet 124.

[0148] The phase change thermal energy storage module 200 includes at least two pairs of reference charging inlets 252 and reference charging outlets 254. Each pair of reference charging inlets 252 and reference charging outlets 254 constitutes a sub-charging flow path. The reference charging inlet 252 of each sub-charging flow path is connected to the outlet 124, and the reference charging outlet 254 of each sub-charging flow path is connected to the inlet 122.

[0149] It should be noted that the cross-line arc shown in Figure 4 represents the point where two lines passing through the cross-line arc do not intersect, that is, the two lines passing through the cross-line arc do not intersect.

[0150] 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.

[0151] 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.

[0152] The phase change thermal storage module has a first operating mode and a second operating mode. A first number of sub-charging flow paths can constitute the charging flow path in the first operating mode, and a second number of sub-charging flow paths can constitute the charging flow path in the second operating mode. Here, the first number is the total number of all sub-charging flow paths, and the second number is less than the first number.

[0153] In one or more embodiments of this application, the reference charging inlet 252 of one or more sub-charging flow paths can be directly connected to the outlet 122 without an electronic control switch. The reference charging inlet 252 of some sub-charging flow paths can be connected to the outlet 124 through an electronic control switch. The reference charging outlet 254 of each sub-charging flow path can also be connected to the inlet 122 through an electronic control switch.

[0154] In one embodiment, for the reference charging inlet 252 and outlet 122 connected via electronically controlled switches, and the reference charging outlet 254 and inlet 124 connected via electronically controlled switches, when all these electronically controlled switches are in the open state, all sub-charging flow paths are in a connected state, that is, a first number of sub-charging flow paths are in a connected state. At this time, the charging flow path in the first operating mode is in a connected state. Otherwise, when any of the above electronically controlled switches is in the closed state, the charging flow path in the first operating mode is in a disconnected state.

[0155] In one embodiment, when the reference charging inlet 252 and outlet 122 of the second number of sub-charging flow paths are connected, and the reference charging outlet 254 is connected to the inlet 124, the second number of sub-charging flow paths are in a connected state. At this time, the charging flow path in the second working mode is in a connected state.

[0156] The working principle of the HVAC system shown in Figure 4 is explained below:

[0157] In one embodiment, the control unit is configured to: if the user sets the hot water production mode to a 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; if the user sets the hot water production mode to a first working mode, 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.

[0158] 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.

[0159] The inlet temperature refers to the temperature measured by the temperature sensor installed at the inlet of the heat pump outdoor unit.

[0160] In one embodiment, the user-set hot water production mode is obtained. When the hot water production mode is the second operating mode, the control unit can control the sub-charging flow path formed by the first pair of reference charging inlets and reference charging outlets to be in a connected state. The sub-charging flow path formed by the first pair of reference charging inlets and reference charging outlets can also be referred to as a preset number of sub-charging flow paths. This preset number of sub-charging flow paths can constitute the first reference charging flow path in the second operating mode. Therefore, the control unit can control the preset number of sub-charging flow paths to be in a connected state, so that the first reference charging flow path in the second operating mode is in a connected state, and perform phase change heat storage treatment based on the first reference charging flow path in the second operating mode. The aforementioned sub-charging flow path formed by the first pair of reference charging inlets and reference charging outlets refers to the sub-charging flow path furthest from the water inlet of the heat pump outdoor unit shown in Figure 4. That is, the first pair of reference charging inlets and reference charging outlets is the top pair of reference charging inlets and reference charging outlets arranged from top to bottom among the several pairs of reference charging inlets and reference charging outlets shown in Figure 4.

[0161] During the phase change heat storage process based on the first reference charging flow path in the second operating mode, the control unit monitors the inlet temperature of the heat pump outdoor unit.

[0162] When the control unit detects that the inlet temperature is greater than or equal to a third temperature threshold and the second duration is greater than or equal to a second duration threshold, it can control each pair of reference charging inlets and outlets to be in a connected state, so that the charging flow path in the first working mode composed of all sub-charging flow paths is 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 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 value range can be 3 to 5 degrees Celsius. The second duration refers to the duration for which the inlet temperature is greater than or equal to the third temperature threshold.

[0163] When the control unit detects that the inlet temperature is less than the third temperature threshold, in a scenario where the phase change heat storage module has at least two second reference charging flow paths under the second operating mode, the control unit sequentially controls the second reference charging flow paths under the second operating mode to be in a connected state, and sequentially performs phase change heat storage treatment based on the second reference charging flow paths, 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. Then, the control unit controls the charging flow path under the first operating mode to be in a connected state, and performs phase change heat storage treatment based on the charging flow path under the first operating mode. The aforementioned phase change heat storage module has at least one second reference charging flow path under the second operating mode. This can be understood as the second quantity including the aforementioned preset quantity and at least one third quantity, where the third quantity's sub-charging flow paths are called the second reference charging flow paths under the second operating mode. For example, if the second quantity includes 1, 2, and 3, and the preset quantity is 1, with 2 and 3 being the third quantity, then the second reference charging flow path under the second operating mode can include 2 sub-charging flow paths, or it can include 3 sub-charging flow paths.

[0164] When the control unit detects that the inlet temperature is lower than the third temperature threshold, in a scenario where the phase change heat storage module has a second reference charging flow path in a second operating mode, the control unit controls the second reference charging flow path in the second operating mode to be in a connected state, and performs phase change heat storage treatment based on the second reference charging flow path, 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. Then, the control unit controls the charging flow path in the first operating mode to be in a connected state, and performs phase change heat storage treatment based on the charging flow path in the first operating mode. For example, if the second quantity includes 1 and 2, the preset quantity is 1, and the third quantity is 2, then the second reference charging flow path in the second operating mode can include 2 sub-charging flow paths.

[0165] In one embodiment, in a scenario where the phase change heat storage module does not have a second reference charging flow path under the second operating mode, i.e., when the second quantity is the aforementioned preset quantity, the control unit monitors the inlet temperature of the heat pump outdoor unit during the phase change heat storage process based on the first reference charging flow path under the second operating mode. When 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, the control unit controls the charging flow path under the first operating mode to be in a connected state, and performs phase change heat storage based on the charging flow path under the first operating mode. That is, the control unit controls the first number of sub-charging flow paths to all perform phase change heat storage. The third duration is the duration during which the inlet temperature is greater than or equal to the third temperature threshold.

[0166] In one embodiment, 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 the charging flow path in the second operating mode.

[0167] In one embodiment, the capacity of the phase change material corresponding to a single sub-charging flow path may be the same or different.

[0168] In one embodiment, a single sub-charging flow path can be designed as a single heat exchanger module. The phase change heat storage module can then include a first number of heat exchanger modules. In a first operating mode, the first number of heat exchanger modules perform phase change heat storage treatment; in a second operating mode, a second number of heat exchanger modules perform phase change heat storage treatment. The phase change material built into the phase change heat storage module can be embedded within the heat exchanger modules. A single heat exchanger module can contain the same capacity of phase change material, or it can contain different capacities of phase change material.

[0169] The HVAC system provided in this application embodiment can 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 at least two pairs of reference energy-charging inlets and outlets, each pair of reference energy-charging inlets and outlets constitutes a sub-energy-charging flow path. This allows these sub-energy-charging flow paths to form the energy-charging flow path in 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 number of sub-energy-charging flow paths in the second operating mode is less than the number in the first operating mode, by first controlling the energy-charging flow path in the second operating mode to be in a connected state, and then controlling the flow path based on the inlet temperature of the heat pump outdoor unit... In the first operating mode, the charging flow path is in a connected state, allowing full utilization of a portion of the phase change material corresponding to a smaller number of sub-charging flow paths in the second operating mode for heat storage during the early stages of the heat storage process. This enables some phase change material 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 of heat storage. Subsequently, based on the inlet temperature control of the heat pump outdoor unit, the charging flow path in the first operating mode is kept in a connected state, allowing full utilization of all phase change materials corresponding to all sub-charging flow paths in the first operating mode for heat storage during the middle and / or later stages of the heat storage process, thereby storing more heat and maintaining a stable hot water temperature. Therefore, the embodiments of this application not only improve the heat release rate of the phase change heat storage module in the early stages of heat storage but also maintain a stable hot water temperature after the rapid release of heat.

[0170] Please refer to Figure 5, which is a structural schematic diagram of a heating, ventilation, and air conditioning (HVAC) system provided in an embodiment of this application. As shown in Figure 5, the HVAC system may include a heat pump outdoor unit 100 and a phase change heat storage module 200, wherein...

[0171] The heat pump outdoor unit 100 includes a control unit 110, a water inlet 122, and a water outlet 124;

[0172] The phase change thermal energy storage module 200 includes at least two pairs of reference charging inlets 252 and reference charging outlets 254, a first control switch 262, and at least one second control switch 264. Each pair of reference charging inlets 252 and reference charging outlets 254 constitutes a sub-charging flow path. The first end of the first control switch 262 is connected to the water inlet of the heat pump outdoor unit, the second end of the first control switch 262 is connected to the reference charging outlet 254 of the first sub-charging flow path, and the third end of the first control switch 262 is connected to the reference charging outlet 254 of the second sub-charging flow path. The first sub-charging flow path is the one closest to the water inlet 122 of the heat pump outdoor unit, and the second sub-charging flow path is any sub-charging flow path other than the first sub-charging flow path.

[0173] The first terminal of each second control switch 264 is connected to the outlet 124 of the heat pump outdoor unit, and the second terminal of each second control switch 264 is connected to the reference charging inlet 252 of the third sub-charging flow path. The third sub-charging flow path includes all sub-charging flow paths of the first and second sub-charging flow paths except for the fourth sub-charging flow path. The fourth sub-charging flow path is the sub-charging flow path furthest from the inlet of the heat pump outdoor unit.

[0174] It should be noted that the cross-line arc shown in Figure 5 represents the point where two lines passing through the cross-line arc do not intersect, that is, the two lines passing through the cross-line arc do not intersect.

[0175] The total number of second control switches is less than the total number of sub-charging flow paths.

[0176] As can be seen from Figure 5, the first sub-charging flow path is the sub-charging flow path formed by the pair of reference charging inlets and reference charging outlets arranged from top to bottom in Figure 5, and the fourth sub-charging flow path is the sub-charging flow path formed by the pair of reference charging inlets and reference charging outlets arranged from top to bottom in Figure 5.

[0177] In one embodiment, the first control switch can be a control valve for changing the flow direction of the fluid medium; for example, the first control switch can be a control valve such as an electric three-way valve. The second control switch can be an automated component for controlling the on / off state of the fluid medium; for example, the second control switch can be a component such as a solenoid valve.

[0178] The phase change thermal storage module has a first operating mode and a second operating mode. A first number of sub-charging flow paths can constitute the charging flow path in the first operating mode, and a second number of sub-charging flow paths can constitute the charging flow path in the second operating mode. Here, the first number is the total number of all sub-charging flow paths, and the second number is less than the first number.

[0179] In one embodiment, the second quantity includes a preset quantity and at least one third quantity, each third quantity being greater than the preset quantity. The preset quantity of sub-charging flow paths constitutes the first reference charging flow path in the second operating mode, and the third quantity of sub-charging flow paths constitutes the second reference charging flow path in the second operating mode.

[0180] Each of the third quantities is different. The capacity of the phase change material corresponding to the first reference charging flow path can be less than the capacity of the phase change material corresponding to any second reference charging flow path. When the second quantity includes at least two third quantities, the fewer the number of sub-charging flow paths the second reference charging flow path has, the smaller the capacity of its corresponding phase change material; the more the number of sub-charging flow paths the second reference charging flow path has, the larger the capacity of its corresponding phase change material.

[0181] Optionally, the above preset quantity can be set to a fixed value based on the actual application environment. For example, the preset quantity can be 1, 2, or 3.

[0182] The working principle of the HVAC system shown in Figure 5 is explained below:

[0183] In one embodiment, the control unit is configured to: if the user sets the hot water production mode to the second working mode, control the first reference charging flow path in the second working mode to be in a connected state, perform phase change heat storage treatment based on the first reference charging flow path in the second working mode, monitor the inlet temperature of the heat pump outdoor unit, control the second reference 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 reference charging flow path in sequence, 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.

[0184] 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.

[0185] In one embodiment, 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 reference charging flow path to be in a connected state, and perform phase change heat storage treatment based on the third reference charging flow path. The third reference charging flow path is a second reference charging flow path composed of a fourth number of sub-charging flow paths in the second working mode, and the fourth number is the third number closest to the preset number.

[0186] The temperature increase of the inlet water temperature is monitored. If the temperature increase is the second temperature threshold and the inlet water temperature after the temperature rise is less than the third temperature threshold, then the second reference charging flow path other than the third reference charging flow path is controlled to be in a connected state in sequence, and phase change heat storage treatment is performed based on the second reference charging flow path other than the third reference charging flow path in sequence.

[0187] 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.

[0188] 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.

[0189] 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.

[0190] 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 thermal storage. The third reference charging flow path is the newly switched charging flow path. Before phase change thermal storage based on the third reference charging flow path, the latest monitored inlet temperature is denoted as T1. During phase change thermal storage based on the third reference 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.

[0191] The second temperature threshold can be set to a fixed value, for example, the second temperature threshold can be set to 2 degrees Celsius.

[0192] The third temperature threshold can be set as the sum of the phase change temperature of the phase change material built into the phase change heat storage module and the second preset temperature. The second preset temperature can be set based on the actual application environment, and the value range of the second preset temperature can be 3 to 5 degrees Celsius.

[0193] In one embodiment, 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 control switch and a second control switch, and to control the charging flow path in the first operating mode to be in a connected state.

[0194] In one embodiment, the control unit is specifically configured to: if the user sets the hot water production mode to the second working mode, control the first and third terminals of the first control switch to be in a connected state, control the second terminal of the first control switch to be in a disconnected state, and control the first and second terminals of each second control switch to be in a disconnected state, so that the first reference charging flow path in the second working mode is in a connected state, and phase change heat storage treatment is performed through the phase change material corresponding to the first reference charging flow path.

[0195] In one embodiment, the control unit is specifically configured to: when the first reference charging flow path is in a connected state under the control of the second operating mode, and phase change heat storage treatment is performed based on the first reference charging flow path under the second operating mode, during the process of monitoring the inlet temperature of the heat pump outdoor unit, when 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 first, second, and third ends of the first control switch to be in a connected state, and control the first and second ends of the second control switch connected to the second sub-charging flow path closest to the fourth sub-charging flow path to be in a connected state, so that the third reference charging flow path under the second operating mode is in a connected state, and phase change heat storage treatment is performed through the phase change material corresponding to the third reference charging flow path.

[0196] In one embodiment, in a scenario where there are at least two second reference charging flow paths in the second operating mode, the control unit is specifically configured to: control the third reference charging flow path in the second operating mode to be in a connected state, perform phase change heat storage treatment based on the third reference charging flow path in the second operating mode, and monitor the temperature increase value of the inlet temperature during the process of monitoring the temperature increase value, when the temperature increase value is a second temperature threshold and the inlet temperature after the temperature increase is less than a third temperature threshold, control the first, second, and third ends of the first control switch to be in a connected state, and control the first and second ends of each second control switch connected to the sub-charging flow path included in the fourth reference charging flow path to be in a connected state, so that the fourth reference charging flow path in the second operating mode is in a connected state, and performs phase change heat storage treatment through the phase change material corresponding to the fourth reference charging flow path.

[0197] During the phase change heat storage process based on the fourth reference charging flow path, the temperature increase at the inlet continues to be monitored. When the temperature increase reaches the second temperature threshold and the inlet temperature after the increase is less than the third temperature threshold, the fifth reference charging flow path is controlled to be connected in the manner described above, and phase change heat storage is performed based on the fifth reference charging flow path. Similarly, whenever the temperature increase at the inlet reaches the second temperature threshold and the inlet temperature after the increase is less than the third temperature threshold, a new charging flow path of more sub-charging flow paths is connected, and phase change heat storage is performed based on this new charging flow path. This continues until 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. At this point, the first, second, and third terminals of the first control switch are connected, and the first and second terminals of each second control switch are connected, so that the charging flow path in the first operating mode is connected, and phase change heat storage is performed using the phase change material corresponding to the charging flow path in the first operating mode.

[0198] The aforementioned fourth reference charging flow path is a fourth charging flow path composed of the fifth number of sub-charging flow paths in the second operating mode, where the fifth number is the third number closest to the fourth number. The aforementioned fifth reference charging flow path is a fourth charging flow path composed of the sixth number of sub-charging flow paths in the second operating mode, where the sixth number is the third number closest to the fifth number. In this configuration, the fifth number is greater than the fourth number, and the sixth number is greater than the fifth number.

[0199] Therefore, the purpose of configuring the phase change thermal storage module with multiple second reference charging flow paths in the second working mode is that when performing phase change thermal storage based on the first reference charging flow path in the second working mode, the capacity of the phase change material corresponding to the first reference 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 reference 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.

[0200] In one embodiment, when the second quantity is a preset quantity, the control unit is configured to: if the user-set hot water production mode is the second working mode, control the first reference charging flow path in the second working mode to be in a connected state, perform phase change heat storage treatment based on the first reference charging flow path in the second working mode, monitor the inlet temperature of the heat pump outdoor unit, and 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 for which the inlet temperature is greater than or equal to the third temperature threshold;

[0201] 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.

[0202] In the embodiment where the second quantity is a preset quantity, taking 1 as an example, the number of second control switches is also 1. The control unit is specifically configured as follows: if the user-set hot water production mode is the second working mode, then the first and third terminals of the first control switch are connected, the second terminal of the first control switch is disconnected, and the first and second terminals of the second control switch are disconnected, so that the first reference charging flow path in the second working mode is connected, and phase change heat storage treatment is performed through the phase change material corresponding to the first reference charging flow path. When the inlet temperature of the heat pump outdoor unit is detected to be greater than or equal to the third temperature threshold, and the second duration is greater than or equal to the third duration threshold, the first, second, and third terminals of the first control switch are connected, and the first and second terminals of the second control switch are connected, 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 corresponding to the charging flow path in the first working mode. If the user sets the hot water production mode to the first working mode, then the first, second and third terminals of the first control switch are connected, and the first and second terminals of the second control switch are connected, 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 corresponding to the charging flow path in the first working mode.

[0203] In one embodiment, 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 third temperature threshold.

[0204] 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.

[0205] Please refer to Figure 6, which is a structural schematic diagram of a heating, ventilation, and air conditioning (HVAC) system provided in an embodiment of this application. As shown in Figure 6, the HVAC system may include a heat pump outdoor unit 100 and a phase change heat storage module 200, wherein...

[0206] The heat pump outdoor unit 100 includes a control unit 110, a water inlet 122, and a water outlet 124;

[0207] The phase change thermal energy storage module 200 includes two pairs of reference charging inlets 252 and reference charging outlets 254, a third control switch 266, and two fourth control switches 268. Each pair of reference charging inlets 252 and reference charging outlets 254 constitutes a sub-charging flow path. The first end of the third control switch 266 is connected to the outlet 124, and the second end of the third control switch 266 is connected to the reference charging inlet 252 of the sub-charging flow path closest to the inlet 124. The first end of each fourth control switch 268 is connected to the reference charging outlet 252 of each sub-charging flow path, and the second end of each fourth control switch 268 is connected to the inlet 122.

[0208] As can be seen from Figure 6, the sub-charging flow path closest to the inlet is the sub-charging flow path formed by the pair of reference charging inlets and reference charging outlets arranged from top to bottom at the bottom of Figure 6.

[0209] It should be noted that the cross-line arc shown in Figure 6 represents the point where two lines passing through the cross-line arc do not intersect, that is, the two lines passing through the cross-line arc do not intersect.

[0210] In one embodiment, the third control switch and the fourth control switch can be automated components for controlling the on / off state of the fluid medium. For example, the third control switch and the fourth control switch can be components such as solenoid valves.

[0211] The phase change thermal storage module has a first operating mode and a second operating mode. A first number of sub-charging flow paths can constitute the charging flow path in the first operating mode, and a second number of sub-charging flow paths can constitute the charging flow path in the second operating mode. The first number is the total number of all sub-charging flow paths, and the second number is less than the first number. In this embodiment, the first number is 2, and the second number is 1.

[0212] As can be seen from Figure 6, the charging flow path in the second working mode is the sub-charging flow path formed by the pair of reference charging inlets and reference charging outlets arranged from top to bottom as shown in Figure 6. The charging flow path in the first working mode includes the two sub-charging flow paths formed by the two pairs of reference charging inlets and reference charging outlets shown in Figure 6.

[0213] In one embodiment, the capacity of the phase change material corresponding to a single sub-charging flow path may be the same or different.

[0214] In one embodiment, a single sub-charging flow path can be designed as a single heat exchanger module. The phase change heat storage module can then include a first number of heat exchanger modules. In a first operating mode, the first number of heat exchanger modules perform phase change heat storage treatment; in a second operating mode, a second number of heat exchanger modules perform phase change heat storage treatment. The phase change material built into the phase change heat storage module can be embedded within the heat exchanger modules. A single heat exchanger module can contain the same capacity of phase change material, or it can contain different capacities of phase change material.

[0215] The working principle of the HVAC system shown in Figure 6 is explained below:

[0216] In one embodiment, 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.

[0217] 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.

[0218] In one embodiment, the control unit is configured to: if the user-set hot water production mode is a 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, and monitor the inlet temperature of the heat pump outdoor unit; if the inlet temperature is greater than or equal to a third temperature threshold, and the second duration is greater than or equal to a second 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 second duration is the duration during which the inlet temperature is greater than or equal to the second temperature threshold.

[0219] In one embodiment, the control unit is configured to: control the charging flow path in the second operating mode to be in a connected state via a third electronic control switch and a fourth control switch, and to control the charging flow path in the first operating mode to be in a connected state.

[0220] In one embodiment, the control unit is specifically configured to: if the user-set hot water production mode is the second working mode, control the first and second terminals of the third control switch to be in the off state, control the first and second terminals of the fourth control switch connected to the charging flow path in the second working mode to be in the connected state, and control the first and second terminals of the fourth control switch not connected to the charging flow path in the second working mode to be in the off state, so that the charging flow path in the second working mode is in the connected state, and phase change heat storage treatment is performed through the phase change material corresponding to the charging flow path in the second working mode, and the inlet temperature of the heat pump outdoor unit is monitored; 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, control the first and second terminals of the third control switch to be in the connected state, and control the first and second terminals of each fourth control switch to be in the connected state, so that the charging flow path in the first working mode is in the connected state, and phase change heat storage treatment is performed through the phase change material corresponding to the charging flow path in the first working mode.

[0221] In one embodiment, the control unit is specifically configured to: if the user sets the hot water production mode to the first working mode, control the first and second ends of the third control switch to be in a connected state, and control the first and second ends of each fourth control switch to be in a connected state, so that the charging flow path in the first working mode is in a connected state, and perform phase change heat storage treatment through the phase change material corresponding to the charging flow path in the first working mode.

[0222] In the HVAC system provided in this application embodiment, the phase change thermal storage module is configured with two pairs of reference charging inlets and outlets to form charging flow paths under different operating modes. This allows the two pairs of reference charging inlets and outlets to constitute charging flow paths for different operating modes of the phase change thermal storage module. Thus, when the user sets the hot water production mode to the second operating mode, since the capacity of the phase change material corresponding to the charging flow path in the second operating mode is less than that in the first operating mode, the charging flow path in the second operating mode is first kept in a connected state, and then the first operating mode is controlled based on the inlet temperature of the heat pump outdoor unit. In the first working mode, the charging flow path is in a connected state, allowing full utilization of a portion of the phase change material corresponding to the charging flow path in the early stage of the heat storage process. This enables the phase change material 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 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 in a connected state, allowing full utilization of all the phase change material corresponding to the charging flow path in the first working mode in the middle and / or later stages of the heat storage process. This stores more heat and keeps 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.

[0223] Please refer to Figure 7, which is a schematic flowchart of 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.

[0224] In one embodiment, the heat storage control method can be applied to a heating, ventilation, and air conditioning (HVAC) system. A structural diagram of the HVAC system can be found in Figure 1 or Figure 2. Specifically, the HVAC system may include:

[0225] Heat pump outdoor unit;

[0226] 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.

[0227] The heat storage control method in this application embodiment may include the following steps:

[0228] S702 determines whether the user-set hot water production mode is the second working mode.

[0229] S704, 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.

[0230] 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.

[0231] 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.

[0232] The inlet temperature refers to the temperature measured by the temperature sensor installed at the inlet of the heat pump outdoor unit.

[0233] 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.

[0234] 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.

[0235] 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.

[0236] 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.

[0237] S706, 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.

[0238] 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.

[0239] 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.

[0240] 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 second electronic control switch, and a second terminal of each second electronic control switch is connected to a second charging outlet controlled by each second electronic control switch. Step S704 may include:

[0241] 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.

[0242] The charging path in the first working mode is kept in a connected state by controlling the first electronic control switch.

[0243] 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.

[0244] 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 S702 includes the following operational steps:

[0245] 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.

[0246] Specifically, step A2 includes the following steps:

[0247] 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.

[0248] 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.

[0249] 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.

[0250] In step a4, the third temperature threshold is calculated by summing the preset material phase transition temperature and the second preset temperature to obtain the third temperature threshold.

[0251] 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.

[0252] 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 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 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 second terminal of the second electronic control switch can be connected to the fourth charging outlet constituting the second charging flow path (away from the first charging flow path), so that the first... The second charging flow path, which is far 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 far from the first charging flow path. Similarly, when switching to the second charging flow path that constitutes the second charging flow path far 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 far 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 far from the first charging flow path is controlled to be in a connected state, and phase change heat storage treatment is performed through the phase change heat storage material corresponding to the third charging flow path far from the first charging flow path. Similarly, the subsequent process of switching to the second charging flow path that constitutes the fourth charging flow path far from the first charging flow path for phase change heat storage treatment can refer to the above description, and will not be described in detail here.

[0253] 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.

[0254] 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.

[0255] 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.

[0256] 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 S704 may include the following operation steps:

[0257] 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.

[0258] The third duration is the duration during which the inlet water temperature is greater than or equal to the third temperature threshold.

[0259] In one feasible implementation, the heat storage control method of this application embodiment can be applied to the HVAC system shown in Figure 3. 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 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. Step S704 may include:

[0260] The charging flow path in the second working mode is kept in a connected state by controlling two third electronic control switches.

[0261] The charging flow path in the first working mode is kept connected by two third electronic control switches.

[0262] 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.

[0263] 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.

[0264] In one embodiment, the heat storage control method shown in FIG7 can be applied to the HVAC system shown in FIG4 to FIG6, the HVAC system comprising:

[0265] A heat pump outdoor unit, the heat pump outdoor unit including a control unit;

[0266] The system includes a phase change heat storage module with a charging flow path. Each charging flow path has at least two pairs of reference charging inlets and reference charging outlets. Each pair of reference charging inlets and reference charging outlets constitutes a sub-charging flow path. The charging inlet of each sub-charging flow path is connected to the outlet of the outdoor unit of the heat pump, and the charging outlet of each sub-charging flow path 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. A first number of sub-charging flow paths constitute the charging flow path in the first operating mode, and a second number of sub-charging flow paths constitute the charging flow path in the second operating mode. The first number is the total number of all sub-charging flow paths, and the second number is less than the first number.

[0267] Referring to the HVAC system shown in Figure 4, the specific implementation process of steps S702-S706 in the heat storage control method shown in Figure 7 is as follows:

[0268] S702: Determine whether the user-set hot water production mode is the second working mode.

[0269] S704: If the user sets the hot water production mode to the second working mode, the charging flow path in the second working mode is kept 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 kept 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.

[0270] S706: If the user sets the hot water production mode to the first working mode, then the energy charging flow path in the first working mode is connected, and phase change heat storage treatment is performed based on the energy charging flow path in the first working mode.

[0271] 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. Given that the phase change thermal storage module produces hot water at the same temperature, the second working mode requires less heating time than 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.

[0272] The inlet temperature refers to the temperature measured by the temperature sensor installed at the inlet of the heat pump outdoor unit.

[0273] In one embodiment, performing step S704 may include the following operations:

[0274] When the hot water production mode is in the second operating mode, the control unit can control the sub-charging flow path formed by the first pair of reference charging inlets and reference charging outlets to be in a connected state. This sub-charging flow path can also be referred to as a preset number of sub-charging flow paths, which can constitute the first reference charging flow path in the second operating mode. Therefore, the control unit can control this preset number of sub-charging flow paths to be in a connected state, so that the first reference charging flow path in the second operating mode is in a connected state, and perform phase change heat storage treatment based on this first reference charging flow path in the second operating mode. The aforementioned sub-charging flow path formed by the first pair of reference charging inlets and reference charging outlets refers to the sub-charging flow path furthest from the heat pump outdoor unit in Figure 4; that is, the first pair of reference charging inlets and reference charging outlets is the top pair of reference charging inlets and reference charging outlets arranged from top to bottom among the several pairs of reference charging inlets and reference charging outlets shown in Figure 4.

[0275] During the phase change heat storage process based on the first reference charging flow path in the second operating mode, the control unit monitors the inlet temperature of the heat pump outdoor unit.

[0276] When the control unit detects that the inlet temperature is greater than or equal to a third temperature threshold and the second duration is greater than or equal to a second duration threshold, it can control each pair of reference charging inlets and outlets to be in a connected state, so that the charging flow path in the first working mode composed of all sub-charging flow paths is 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 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 value range can be 3 to 5 degrees Celsius. The second duration refers to the duration for which the inlet temperature is greater than or equal to the third temperature threshold.

[0277] When the control unit detects that the inlet temperature is less than the third temperature threshold, in a scenario where the phase change heat storage module has at least two second reference charging flow paths under the second operating mode, the control unit sequentially controls the second reference charging flow paths under the second operating mode to be in a connected state, and sequentially performs phase change heat storage treatment based on the second reference charging flow paths, 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. Then, the control unit controls the charging flow path under the first operating mode to be in a connected state, and performs phase change heat storage treatment based on the charging flow path under the first operating mode. The aforementioned phase change heat storage module has at least one second reference charging flow path under the second operating mode. This can be understood as the second quantity including the aforementioned preset quantity and at least one third quantity, where the third quantity's sub-charging flow paths are called the second reference charging flow paths under the second operating mode. For example, if the second quantity includes 1, 2, and 3, and the preset quantity is 1, with 2 and 3 being the third quantity, then the second reference charging flow path under the second operating mode can include 2 sub-charging flow paths, or it can include 3 sub-charging flow paths.

[0278] When the control unit detects that the inlet temperature is lower than the third temperature threshold, in a scenario where the phase change heat storage module has a second reference charging flow path in a second operating mode, the control unit controls the second reference charging flow path in the second operating mode to be in a connected state, and performs phase change heat storage treatment based on the second reference charging flow path, 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. Then, the control unit controls the charging flow path in the first operating mode to be in a connected state, and performs phase change heat storage treatment based on the charging flow path in the first operating mode. For example, if the second quantity includes 1 and 2, the preset quantity is 1, and the third quantity is 2, then the second reference charging flow path in the second operating mode can include 2 sub-charging flow paths.

[0279] In scenarios where the phase change heat storage module does not have a second reference charging flow path under the second operating mode, i.e., when the second quantity is the aforementioned preset quantity, the control unit monitors the inlet temperature of the heat pump outdoor unit during the phase change heat storage process based on the first reference charging flow path under the second operating mode. When 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, the control unit controls the charging flow path under the first operating mode to be in a connected state, and performs phase change heat storage based on the charging flow path under the first operating mode. That is, the control unit controls the first number of sub-charging flow paths to perform phase change heat storage. The third duration is the duration during which the inlet temperature is greater than or equal to the third temperature threshold.

[0280] In one embodiment, 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 the charging flow path in the second operating mode.

[0281] In one embodiment, the capacity of the phase change material corresponding to a single sub-charging flow path may be the same or different.

[0282] In one embodiment, a single sub-charging flow path can be designed as a single heat exchanger module. The phase change heat storage module can then include a first number of heat exchanger modules. In a first operating mode, the first number of heat exchanger modules perform phase change heat storage treatment; in a second operating mode, a second number of heat exchanger modules perform phase change heat storage treatment. The phase change material built into the phase change heat storage module can be embedded within the heat exchanger modules. A single heat exchanger module can contain the same capacity of phase change material, or it can contain different capacities of phase change material.

[0283] In one embodiment, performing step S706 may include the following operations:

[0284] When the hot water production mode is the first working mode, the control unit can control each pair of reference charging inlets and reference charging outlets to be in a connected state, so that the charging flow path in the first working mode is in a connected state, and phase change heat storage treatment is performed based on the charging flow path in the first working mode.

[0285] In one embodiment, referring to the HVAC system shown in Figure 5, the phase change heat storage module includes at least two pairs of reference charging inlets and outlets, a first control switch, and at least one second control switch. Each pair of reference charging inlets and outlets constitutes a sub-charging flow path. The first end of the first control switch is connected to the water inlet of the outdoor unit of the heat pump, the second end of the first control switch is connected to the reference charging outlet of the first sub-charging flow path, and the third end of the first control switch is connected to the reference charging outlet of the second sub-charging flow path. The first sub-charging flow path is the one closest to the water inlet of the outdoor unit of the heat pump, and the second sub-charging flow path is any sub-charging flow path other than the first sub-charging flow path. The first end of each second control switch is connected to the water outlet of the outdoor unit of the heat pump, and the second end of each second control switch is connected to the reference charging inlet of the third sub-charging flow path. The third sub-charging flow path includes the sub-charging flow paths of the first and second sub-charging flow paths, excluding the fourth sub-charging flow path. The fourth sub-charging flow path is the sub-charging flow path furthest from the water inlet of the heat pump outdoor unit.

[0286] Referring to the HVAC system shown in Figure 5, step S704 can specifically include: controlling the charging flow path in the second working mode to be in a connected state through the first control switch and the second control switch, and controlling the charging flow path in the first working mode to be in a connected state.

[0287] In one embodiment, the second quantity includes a preset quantity and at least one third quantity, each third quantity being greater than the preset quantity. The preset quantity of sub-charging current paths constitutes the first reference charging current path in the second operating mode, and the third quantity of sub-charging current paths constitutes the second reference charging current path in the second operating mode. Step S704 may specifically include the following step B4:

[0288] B4: If the user sets the hot water production mode to the second working mode, then the first reference charging flow path in the second working mode is kept in a connected state. Phase change heat storage treatment is performed based on the first reference charging flow path in the second working mode. The inlet temperature of the heat pump outdoor unit is monitored. Based on the inlet temperature, the second reference charging flow path in the second working mode is kept in a connected state in sequence. Phase change heat storage treatment is performed based on the second reference charging flow path in sequence. Based on the inlet temperature, the charging flow path in the first working mode is kept in a connected state. Phase change heat storage treatment is performed based on the charging flow path in the first working mode.

[0289] In one embodiment, step B4 may include the following steps b2-b6:

[0290] b2: If the user sets the hot water production mode to the second working mode, then the first reference charging flow path under the second working mode is connected, and phase change heat storage treatment is performed based on the first reference charging flow path under the second working mode. The inlet temperature of the heat pump outdoor unit is monitored. 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 reference charging flow path is connected, and phase change heat storage treatment is performed based on the third reference charging flow path. The third reference charging flow path is the second reference charging flow path composed of the fourth number of sub-charging flow paths under the second working mode. The fourth number is the third number closest to the preset number.

[0291] b4: Monitor the temperature increase of the inlet water temperature. If the temperature increase 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 reference charging flow path (excluding the third reference charging flow path) to be in a connected state in sequence, and perform phase change heat storage treatment based on the second reference charging flow path (excluding the third reference charging flow path) in sequence.

[0292] b6: 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.

[0293] In one embodiment, the first temperature threshold is calculated by calculating the difference between the preset material phase transition temperature and the first preset temperature to obtain the first temperature threshold.

[0294] 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.

[0295] In one embodiment, the operation of controlling the first reference charging flow path in the second working mode to be in a connected state in step b2, and performing phase change heat storage treatment based on the first reference charging flow path in the second working mode, may specifically include: controlling the first and third ends of the first control switch to be in a connected state, controlling the second end of the first control switch to be in a disconnected state, and controlling the first and second ends of each second control switch to be in a disconnected state, so that the first reference charging flow path in the second working mode is in a connected state, and performing phase change heat storage treatment through the phase change material corresponding to the first reference charging flow path.

[0296] In one embodiment, the operation of controlling the third reference charging flow path to be in a connected state in step b2 and performing phase change heat storage treatment based on the third reference charging flow path may specifically include: controlling the first, second, and third ends of the first control switch to be in a connected state, and controlling the first and second ends of the second control switch connected to the second sub-charging flow path closest to the fourth sub-charging flow path to be in a connected state, so that the third reference charging flow path in the second working mode is in a connected state, and performing phase change heat storage treatment through the phase change material corresponding to the third reference charging flow path.

[0297] In one embodiment, the aforementioned temperature increase refers to the temperature rise detected at the inlet water temperature during each switch to a new charging flow path for phase change heat storage treatment. It can be understood that the third reference charging flow path is the newly switched charging flow path. Before phase change heat storage treatment based on the third reference charging flow path, the latest detected inlet water temperature is denoted as T1. During phase change treatment based on the third reference charging flow path, the latest detected inlet water temperature is denoted as T2. T2 is greater than T1, and the difference between T2 and T1 is the temperature increase. The inlet water temperature after the temperature increase refers to the latest inlet water temperature when the detected temperature increase is equal to the second temperature threshold.

[0298] The second temperature threshold can be set to a fixed value, for example, the second temperature threshold can be set to 2 degrees Celsius.

[0299] In one embodiment, the third temperature threshold is calculated by calculating the sum of the preset material phase transition temperature and the second preset temperature to obtain the third temperature threshold.

[0300] In one embodiment, step b4 may include: while controlling the third reference charging flow path in the second working mode to be in a connected state, performing phase change heat storage treatment based on the third reference charging flow path in the second working mode, and monitoring the temperature increase value of the inlet temperature, when the temperature increase value is a second temperature threshold and the inlet temperature after the temperature increase is less than a third temperature threshold, controlling the first, second, and third ends of the first control switch to be in a connected state, and controlling the first and second ends of each second control switch connected to the sub-charging flow path included in the fourth reference charging flow path to be in a connected state, so that the fourth reference charging flow path in the second working mode is in a connected state, and performing phase change heat storage treatment through the phase change material corresponding to the fourth reference charging flow path.

[0301] During the phase change heat storage process based on the fourth reference charging flow path, the temperature increase at the inlet continues to be monitored. When the temperature increase reaches the second temperature threshold and the inlet temperature after the increase is less than the third temperature threshold, the fifth reference charging flow path is controlled to be connected in the manner described above, and phase change heat storage is performed based on the fifth reference charging flow path. Similarly, whenever the temperature increase at the inlet reaches the second temperature threshold and the inlet temperature after the increase is less than the third temperature threshold, a new charging flow path of more sub-charging flow paths is connected, and phase change heat storage is performed based on this new charging flow path. This continues until 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. At this point, the first, second, and third terminals of the first control switch are connected, and the first and second terminals of each second control switch are connected, so that the charging flow path in the first operating mode is connected, and phase change heat storage is performed using the phase change material corresponding to the charging flow path in the first operating mode.

[0302] The aforementioned fourth reference charging flow path is a fourth charging flow path composed of the fifth number of sub-charging flow paths in the second operating mode, where the fifth number is the third number closest to the fourth number. The aforementioned fifth reference charging flow path is a fourth charging flow path composed of the sixth number of sub-charging flow paths in the second operating mode, where the sixth number is the third number closest to the fifth number. In this configuration, the fifth number is greater than the fourth number, and the sixth number is greater than the fifth number.

[0303] In one embodiment, performing step S704 may include the following step C4:

[0304] C4: If the user-set hot water production mode is the second working mode, then the first reference charging flow path in the second working mode is kept in a connected state. Phase change heat storage treatment is performed based on the first reference charging flow path in the second working mode. The inlet temperature of the heat pump outdoor unit is monitored. 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 kept 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 temperature is greater than or equal to the third temperature threshold.

[0305] In the embodiment shown in step C4, taking a preset quantity of 1 as an example, the quantity of the second control switch is also 1. Executing step C4 may include: if the user-set hot water production mode is the second working mode, then the first and third terminals of the first control switch are connected, the second terminal of the first control switch is disconnected, and the first and second terminals of the second control switch are disconnected, so that the first reference charging flow path in the second working mode is connected, and phase change heat storage treatment is performed through the phase change material corresponding to the first reference charging flow path. When the inlet temperature of the heat pump outdoor unit is detected to be greater than or equal to the third temperature threshold, and the second duration is greater than or equal to the third duration threshold, the first, second, and third terminals of the first control switch are connected, and the first and second terminals of the second control switch are connected, 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 corresponding to the charging flow path in the first working mode. If the user sets the hot water production mode to the first working mode, then the first, second and third terminals of the first control switch are connected, and the first and second terminals of the second control switch are connected, 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 corresponding to the charging flow path in the first working mode.

[0306] Referring to the HVAC system schematic diagram shown in Figure 6, the phase change thermal energy storage module includes two pairs of reference charging inlets and reference charging outlets, a third control switch, and two fourth control switches; in one embodiment, step S704 may specifically include the following operations:

[0307] If the user sets the hot water production mode to the second working mode, then the first and second terminals of the third control switch are in the off state, the first and second terminals of the fourth control switch connected to the charging flow path in the second working mode are in the connected state, and the first and second terminals of the fourth control switch not connected to the charging flow path in the second working mode are in the off state, so that the charging flow path in the second working mode is in the connected state, and phase change heat storage treatment is performed through the phase change material corresponding to the charging flow path in the second working mode, and the inlet temperature of the heat pump outdoor unit is monitored; 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 first and second terminals of the third control switch are in the connected state, and the first and second terminals of each fourth control switch are in the connected state, so that the charging flow path in the first working mode is in the connected state, and phase change heat storage treatment is performed through the phase change material corresponding to the charging flow path in the first working mode.

[0308] In one embodiment, step S706 may specifically include the following operations:

[0309] If the user sets the hot water production mode to the first working mode, then the first and second terminals of the third control switch are connected, and the first and second terminals of each fourth control switch are connected, 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 corresponding to the charging flow path in the first working mode.

[0310] The heat storage control method provided in this application embodiment is applied to a heating, ventilation, and air conditioning (HVAC) system, which 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 at least two pairs of reference energy-charging inlets and outlets, each pair of reference energy-charging inlets and outlets constitutes a sub-energy-charging flow path. This allows these sub-energy-charging flow paths to form energy-charging flow paths in 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 number of sub-energy-charging flow paths in the second operating mode is less than the number in the first operating mode, by first controlling the energy-charging flow path in the second operating mode to be in a connected state, and then based on the heat pump outdoor unit… In the first operating mode, the inlet temperature control of the heat pump outdoor unit keeps the charging flow path connected. This allows for the full utilization of a smaller number of phase change materials corresponding to the sub-charging flow paths in the second operating mode during the early stages of the heat storage process. This enables some phase change materials 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 of heat storage. Subsequently, by keeping the charging flow path in the first operating mode connected, the inlet temperature control of the outdoor unit ensures that all phase change materials corresponding to all sub-charging flow paths in the first operating mode can 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.

[0311] The thermal storage control device provided in the embodiments of this application will now be described in detail with reference to Figure 8. It should be noted that the thermal storage control device shown in Figure 8 is used to execute the methods 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.

[0312] Please refer to Figure 8, which shows a schematic diagram of the structure of a heat storage control device according to an embodiment of this application. This heat storage control device 1 can be implemented as all or part of the equipment through software, hardware, or a combination of both.

[0313] In one embodiment, 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 a control unit.

[0314] 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 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. 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 outdoor unit of the heat pump, the second charging outlet is connected to the water inlet of the outdoor unit of the heat pump, and the first charging outlet is connected to the water inlet of the outdoor unit of the heat pump. 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.

[0315] In one embodiment, the heat storage control device 1 can also be applied to another HVAC system, which includes: a heat pump outdoor unit, the heat pump outdoor unit including a control unit; and a phase change heat storage module, the phase change heat storage module having a charging flow path, the charging flow path having at least two pairs of reference charging inlets and reference charging outlets, each pair of reference charging inlets and reference charging outlets constituting a sub-charging flow path, the charging inlet of each sub-charging flow path being connected to the outlet of the heat pump outdoor unit, and the charging outlet of each sub-charging flow path being connected to the inlet of the heat pump outdoor unit; the phase change heat storage module has a first operating mode and a second operating mode, a first number of sub-charging flow paths constituting the charging flow path in the first operating mode, and a second number of sub-charging flow paths constituting the charging flow path in the second operating mode, the first number being the total number of all sub-charging flow paths, and the second number being less than the first number.

[0316] 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:

[0317] 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.

[0318] 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.

[0319] 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.

[0320] 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.

[0321] This application also provides a computer storage medium that can store multiple instructions. These instructions are adapted to be loaded and executed by a processor using the heat storage control method shown in the embodiment of FIG4 above. For the specific execution process, please refer to the detailed description of the embodiment shown in FIG4, which will not be repeated here.

[0322] This application also provides a computer program product that stores at least one instruction, which is loaded by the processor and executed as shown in the embodiment of FIG4 above. For the specific execution process, please refer to the detailed description of the embodiment shown in FIG4, which will not be repeated here.

[0323] Please refer to Figure 6, which 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.

[0324] 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.

[0325] 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.

[0326] 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.

[0327] 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.

[0328] 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.

[0329] In the electronic device of FIG6, 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.

[0330] 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.

[0331] 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 system wherein, The heating system comprises: a heat pump outdoor unit, the heat pump outdoor unit comprising a control unit; and a phase change heat storage module, the phase change heat storage module having a charging flow path, the charging flow path having one charging inlet and at least two charging outlets, the at least two charging outlets being sequentially and spaced apart in a direction away from the charging inlet, the charging outlet farthest from the charging inlet being a first charging outlet, the charging outlet other than the first charging outlet being a second charging outlet, the charging inlet being connected to a water outlet of the heat pump outdoor unit, the second charging outlet being connected to a water inlet of the heat pump outdoor unit, and the first charging outlet being connected to the water inlet of the heat pump outdoor unit; the phase change heat storage module having a first working mode and a second working mode, the charging inlet and the first charging outlet constituting an inlet and an outlet of the charging flow path in the first working mode, and the charging inlet and any one of the second charging outlets constituting an inlet and an outlet of the charging flow path in the second working mode; the control unit being configured to: if the user-set heating water mode is 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 water 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 water inlet temperature, and perform phase change heat storage treatment based on the charging flow path in the first working mode; if the user-set heating water mode is the first working mode, 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.

2. The heating system of claim 1, wherein, The charging flow path has one charging inlet, one first charging outlet, and at least two second charging outlets, the second charging outlet farthest from the first charging outlet being a third charging outlet, the second charging outlet other than the third charging outlet being a fourth charging outlet, the charging inlet and the third charging outlet constituting an inlet and an outlet of the first charging flow path in the second working mode, and the charging inlet and any one of the fourth charging outlets constituting an inlet and an outlet of the second charging flow path in the second working mode.

3. The heating system of claim 2, wherein, The control unit is configured to: if the user-set heating water mode is 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 water inlet temperature of the heat pump outdoor unit, sequentially control the second charging flow path in the second working mode to be in a connected state based on the water inlet temperature, sequentially 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 water inlet temperature, and perform phase change heat storage treatment based on the charging flow path in the first working mode.

4. The heating system of claim 3, wherein, 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 heating system according to any one of claims 1 to 4, wherein 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 third temperature threshold.

6. The heating system of claim 1, wherein, 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 the third temperature threshold.

7. The heating system according to any one of claims 1 to 6, wherein 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 heating system of claim 7, wherein, 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 heating system of claim 1, wherein, 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 heating system of claim 9, wherein, 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 path in the first working mode is kept in a connected state by the two third electronic control switches.

11. A heating and ventilation system wherein, The HVAC system includes: A heat pump outdoor unit, the heat pump outdoor unit including a control unit; The system includes a phase change heat storage module, which has a charging flow path. The charging flow path has at least two pairs of reference charging inlets and reference charging outlets. Each pair of reference charging inlets and reference charging outlets constitutes a sub-charging flow path. The reference charging inlet of each sub-charging flow path is connected to the outlet of the outdoor unit of the heat pump, and the reference charging outlet of each sub-charging flow path 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. A first number of sub-charging flow paths constitute the charging flow path in the first operating mode, and a second number of sub-charging flow paths constitute the charging flow path in the second operating mode. The first number is the total number of all sub-charging flow paths, and the second number is less than the first number. 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.

12. The heating system of claim 11, wherein, The second quantity includes a preset quantity and at least one third quantity, each of the third quantities being greater than the preset quantity. The sub-charging flow paths of the preset quantity constitute a first reference charging flow path in the second operating mode, and the sub-charging flow paths of the third quantity constitute a second reference charging flow path in the second operating mode.

13. The heating system of claim 12, wherein, The control unit is configured to: If the user sets the hot water production mode to the second working mode, then the first reference 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 reference charging flow path in the second working mode. The inlet temperature of the heat pump outdoor unit is monitored, and the second reference charging flow path in the second working mode is controlled to be in a connected state based on the inlet temperature. Phase change heat storage treatment is performed based on the second reference charging flow path in the second working mode. 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.

14. The heating system of claim 13, wherein, 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 reference charging flow path is controlled to be in a connected state, and phase change heat storage treatment is performed based on the third reference charging flow path. The third reference charging flow path is the second reference charging flow path composed of the fourth number of the sub-charging flow paths in the second working mode. The fourth number is the third number closest to the preset number. The temperature increase of the inlet temperature is monitored. If the temperature increase is equal to the second temperature threshold and the inlet temperature after the temperature rise is less than the third temperature threshold, then the second reference charging flow path other than the third reference charging flow path is sequentially controlled to be in a connected state, and phase change heat storage treatment is sequentially performed based on the second reference charging flow path other than the third reference 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.

15. The heating system according to any one of claims 11 to 14, wherein, 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 third temperature threshold.

16. The heating system of claim 11, wherein, The second quantity is a preset quantity, and the control unit is configured as follows: 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 the third temperature threshold.

17. The heating system of any one of claims 11 to 16, wherein, The phase change thermal storage module further includes a first control switch and at least one second control switch. The first end of the first control switch is connected to the water inlet of the heat pump outdoor unit, the second end of the first control switch is connected to the reference charging outlet of the first sub-charging flow path, and the third end of the first control switch is connected to the reference charging outlet of the second sub-charging flow path. The first sub-charging flow path is the sub-charging flow path closest to the water inlet of the heat pump outdoor unit, and the second sub-charging flow path is any sub-charging flow path other than the first sub-charging flow path. The first end of each second control switch is connected to the water outlet of the heat pump outdoor unit, and the second end of each second control switch is connected to the reference charging inlet of the third sub-charging flow path. The third sub-charging flow path includes the first sub-charging flow path and any sub-charging flow path other than the fourth sub-charging flow path among the second and third sub-charging flow paths. The fourth sub-charging flow path is the sub-charging flow path furthest from the water inlet of the heat pump outdoor unit.

18. The heating system of claim 17, wherein, The control unit is configured to: The first control switch and the second control switch control the charging flow path in the second working mode to be in a connected state, and control the charging flow path in the first working mode to be in a connected state.

19. The heating system of claim 11, wherein, When the charging flow path has two pairs of reference charging inlets and reference charging outlets, the phase change heat storage module includes a third control switch and two fourth control switches; the first end of the third control switch is connected to the outlet of the heat pump outdoor unit, and the second end of the third control switch is connected to the reference charging inlet of the sub-charging flow path closest to the inlet of the heat pump outdoor unit; the first end of each fourth control switch is connected to the reference charging outlet of each sub-charging flow path, and the second end of each fourth control switch is connected to the inlet of the heat pump outdoor unit.

20. The heating system of claim 19, wherein, The control unit is configured to: The third control switch and the fourth control switch control the charging flow path in the second working mode to be in a connected state, and control the charging flow path in the first working mode to be in a connected state.

21. A heat storage control method in which, Applied to HVAC systems, the HVAC system comprising: Heat pump outdoor unit; 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. 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.

22. A heat storage control method in which, Applied to HVAC systems, the HVAC system comprising: A heat pump outdoor unit, the heat pump outdoor unit including a control unit; The system includes a phase change heat storage module, which has a charging flow path. The charging flow path has at least two pairs of reference charging inlets and reference charging outlets. Each pair of reference charging inlets and reference charging outlets constitutes a sub-charging flow path. The charging inlet of each sub-charging flow path is connected to the outlet of the outdoor unit of the heat pump, and the charging outlet of each sub-charging flow path 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. A first number of sub-charging flow paths constitute the charging flow path in the first operating mode, and a second number of sub-charging flow paths constitute the charging flow path in the second operating mode. The first number is the total number of all sub-charging flow paths, and the second number is less than the first number. 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.

23. A computer storage medium, wherein, The computer storage medium stores a plurality of instructions adapted for loading by a processor and executing the method as described in claim 21 or 22.

24. An electronic device, comprising: 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 21 or 22.

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