High-temperature protection method of phase change heat storage module, heating and ventilation system and storage medium

Abstract

The embodiment of the invention discloses a high-temperature protection method for a phase change heat storage module, a heating and ventilation system and a storage medium, and the method comprises the steps: monitoring the module induction temperature of a temperature monitoring point when the phase change heat storage module is in an energy charging mode, determining a target induction temperature from the module induction temperature, if the target induction temperature is larger than or equal to the first preset control temperature, the high-temperature protection mode is executed on the phase change heat storage module, and if the target induction temperature is smaller than the second preset control temperature, the phase change heat storage module quits the high-temperature protection mode, the first preset control temperature is the difference value between the phase change material failure temperature and the first temperature coefficient, the second preset control temperature is the difference value between the phase change material failure temperature and the second temperature coefficient, and the first temperature coefficient is smaller than the second temperature coefficient, so that timely high-temperature protection of the phase change heat storage module can be realized through the method.

Description

Technical Field

[0001] The present application relates to the field of HVAC technology, and in particular to a high-temperature protection method, device, HVAC system, storage medium and electronic equipment for a phase change thermal storage module. Background Art

[0002] Phase change thermal storage module is a device that uses phase change materials to store and release energy. Phase change energy storage module uses phase change materials to absorb or release a large amount of latent heat during phase changes (such as solid-liquid, gas-liquid) to achieve efficient energy storage. Compared with traditional sensible heat energy storage technology, its heat storage density is higher. Within a certain temperature range, the energy storage density of phase change materials is twice that of water, and the volume of the energy storage module can be reduced to half of that of an independent water tank. The application of phase change energy storage technology in heat pump systems achieves efficient heat storage by absorbing the heat provided by the heat pump, and exchanges heat with low-temperature domestic hot water through a high-power heat exchanger during the heat release process to achieve instant hot water supply.

[0003] In actual applications, when the phase change material is overheated and the temperature is greater than the material failure temperature of the phase change material itself, the performance of the phase change material will irreversibly decay. In particular, adding additional heat sources for heating can easily cause the system water temperature to be too high. The HVAC system based on the phase change thermal storage module cannot be protected in time, causing the phase change thermal storage module to overheat and perform performance degradation, which will seriously affect user use. It can be seen that how to protect the phase change thermal storage module from high temperature is an issue that needs to be solved urgently. Summary of the invention

[0004] The embodiment of the present application provides a high temperature protection method for a phase change thermal storage module, a HVAC system and a storage medium, and the technical solution is as follows:

[0005] In a first aspect, an embodiment of the present application provides a HVAC system, characterized in that the HVAC system comprises:

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

[0007] A phase-change thermal storage module, wherein the phase-change thermal storage module comprises a charging inlet and a charging outlet, wherein the charging inlet is connected to a heat source water outlet of the heat pump external unit, and the charging outlet is connected to a heat source water inlet of the heat pump external unit, wherein the heat pump external unit and the phase-change thermal storage module respectively form a charging flow path through the heat source water outlet, the charging inlet, the charging outlet and the heat source water inlet, wherein at least one temperature monitoring point is arranged in the phase-change thermal storage module, and the phase-change thermal storage module comprises at least a charging mode and a high temperature protection mode;

[0008] The control unit is configured as follows:

[0009] When the phase change thermal storage module is in a charging mode, monitoring the module sensing temperature at the temperature monitoring point, and determining a target sensing temperature from the module sensing temperature;

[0010] If the target sensing temperature is greater than or equal to the first preset control temperature, the high temperature protection mode is executed on the phase change thermal storage module;

[0011] If the target sensing temperature is lower than the second preset control temperature, the phase change thermal storage module exits the high temperature protection mode;

[0012] The first preset control temperature is the difference between the failure temperature of the phase change material and the first temperature coefficient, the second preset control temperature is the difference between the failure temperature of the phase change material and the second temperature coefficient, and the first temperature coefficient is smaller than the second temperature coefficient.

[0013] In a feasible implementation manner, the high temperature protection mode includes supplying water to cool the phase change thermal storage module and reducing the frequency of the heat pump external unit.

[0014] In a feasible implementation manner, the heat pump external unit includes a water pump and a compressor, and the control unit is configured as follows:

[0015] The water pump is controlled based on the maximum water output to supply water and cool the phase change thermal storage module, and the compressor is frequency-reduced based on a preset cycle and a preset adjustment frequency.

[0016] In a feasible implementation manner, the control unit is configured as follows:

[0017] If the target sensing temperature is greater than or equal to the third preset control temperature, monitoring the duration of the state in the target temperature state;

[0018] If the state lasts longer than the first preset time, the shutdown protection mode is executed;

[0019] The target temperature state is a temperature state when the target sensing temperature is greater than or equal to a third preset control temperature.

[0020] In a feasible implementation manner, the third temperature coefficient is greater than or equal to 3 and the third temperature coefficient is less than 6.

[0021] In a feasible implementation manner, the HVAC system includes a water supply switch, and the water supply switch is respectively connected to the heat source water outlet and the charging inlet.

[0022] The control unit is configured as follows:

[0023] After executing the shutdown protection mode, the water supply switch is controlled to be in a closed state, and the charging flow path is in a flow path disconnected state in the closed state.

[0024] In a feasible implementation manner, the control unit is configured as follows:

[0025] monitoring the water supply shut-off duration and the target sensed temperature;

[0026] If the water supply shutdown time is longer than the second preset time and the target sensing temperature is lower than the second preset control temperature, the shutdown protection mode is exited.

[0027] In a feasible implementation manner, the control unit is configured as follows:

[0028] A system restart instruction is detected to exit the shutdown protection mode.

[0029] In a feasible implementation manner, the control unit is configured as follows:

[0030] After the shutdown protection mode is executed, if the state lasts for a time longer than a third preset time, the system cooling mode is turned on;

[0031] If the target sensing temperature is lower than the second preset control temperature, the system cooling mode is exited.

[0032] In a feasible implementation manner, the first temperature coefficient is greater than or equal to 6 and less than 10, and the second temperature coefficient is less than 15 and greater than 10.

[0033] In a feasible implementation manner, the phase-change thermal storage module includes a first temperature distribution region and a second temperature distribution region set for the phase-change material, and the temperature of the first temperature distribution region is greater than the temperature of the second temperature distribution region;

[0034] The first temperature distribution area is configured with at least one first temperature monitoring point, the second temperature distribution area is configured with at least one second temperature monitoring point, and the module sensing temperature includes a first module sensing temperature corresponding to the first temperature monitoring point and a second module sensing temperature corresponding to the second temperature monitoring point.

[0035] In a feasible implementation manner, the first temperature distribution area and the second temperature distribution area are set based on the temperature gradient distribution in the charging flow path direction in the phase change thermal storage module.

[0036] In a feasible implementation manner, the target sensing temperature is the maximum sensing temperature among the module sensing temperatures.

[0037] In a second aspect, an embodiment of the present application provides a high temperature protection method, characterized in that it is applied to a HVAC system including a heat pump external unit, a phase change heat storage module, and the control unit.

[0038] The heat pump external unit includes a control unit;

[0039] A phase-change thermal storage module, wherein the phase-change thermal storage module comprises a charging inlet and a charging outlet, wherein the charging inlet is connected to a heat source water outlet of the heat pump external unit, and the charging outlet is connected to a heat source water inlet of the heat pump external unit, wherein the heat pump external unit and the phase-change thermal storage module respectively form a charging flow path through the heat source water outlet, the charging inlet, the charging outlet and the heat source water inlet, wherein at least one temperature monitoring point is arranged in the phase-change thermal storage module, and the phase-change thermal storage module comprises at least a charging mode and a high temperature protection mode;

[0040] The method comprises:

[0041] When the phase change thermal storage module is in a charging mode, monitoring the module sensing temperature at the temperature monitoring point, and determining a target sensing temperature from the module sensing temperature;

[0042] If the target sensing temperature is greater than or equal to the first preset control temperature, the high temperature protection mode is executed on the phase change thermal storage module;

[0043] If the target sensing temperature is lower than the second preset control temperature, the phase change thermal storage module exits the high temperature protection mode;

[0044] The first preset control temperature is the difference between the failure temperature of the phase change material and the first temperature coefficient, the second preset control temperature is the difference between the failure temperature of the phase change material and the second temperature coefficient, and the first temperature coefficient is smaller than the second temperature coefficient.

[0045] In a third aspect, an embodiment of the present application provides a phase change thermal storage module, characterized in that it includes:

[0046] A shell, wherein a heat exchange module and a phase change material are arranged in the shell, the heat exchange module is buried in the phase change material, and the heat exchange module is thermally connected to the phase change material;

[0047] A temperature sensing component is inserted into the phase change material to a preset depth, wherein the temperature sensing component is a temperature monitoring point set in the phase change thermal storage module.

[0048] In a feasible implementation manner, the temperature sensing component includes:

[0049] A support plate, disposed on the heat exchange module, and the support plate has an assembly hole;

[0050] A blind tube, inserted into the assembly hole and used to extend into the phase change material, wherein the inner wall surface of the blind tube is provided with a positioning structure;

[0051] The temperature sensing detector comprises a temperature sensing probe arranged inside the blind tube, wherein the temperature sensing probe cooperates with the positioning structure to limit a preset depth of the temperature sensing probe inserted into the phase change material.

[0052] In a feasible implementation manner, the positioning structure includes a positioning protrusion arranged on the inner wall surface of the blind tube, and the temperature sensing probe is engaged with or abuts against the positioning protrusion.

[0053] In a feasible implementation manner, the positioning protrusions are arranged along the circumference of the blind tube in a circle; or,

[0054] The plurality of positioning protrusions are sequentially spaced apart along the circumference of the blind tube.

[0055] In a feasible embodiment, the temperature detector also includes a sensor wire body, the sensor wire body portion is inserted into the blind tube and connected to the temperature sensing probe, and the outer wall surface of the sensor wire body is provided with an in-position indicator portion, when the temperature sensing probe cooperates with the positioning structure, the in-position indicator portion is located at the pipe mouth of the blind tube.

[0056] In a feasible implementation manner, the temperature sensing component further includes heat transfer oil, the heat transfer oil is disposed inside the blind pipe, and the temperature sensing probe is immersed in the heat transfer oil.

[0057] In a fourth aspect, an embodiment of the present application provides a high temperature protection device, characterized in that it is applied to a HVAC system, including a heat pump external unit, a phase change heat storage module, and the control unit.

[0058] The heat pump external unit includes a control unit;

[0059] A phase-change thermal storage module, wherein the phase-change thermal storage module comprises a charging inlet and a charging outlet, wherein the charging inlet is connected to a heat source water outlet of the heat pump external unit, and the charging outlet is connected to a heat source water inlet of the heat pump external unit, wherein the heat pump external unit and the phase-change thermal storage module respectively form a charging flow path through the heat source water outlet, the charging inlet, the charging outlet and the heat source water inlet, wherein at least one temperature monitoring point is arranged in the phase-change thermal storage module, and the phase-change thermal storage module comprises at least a charging mode and a high temperature protection mode;

[0060] The device comprises:

[0061] A monitoring module, used for monitoring the module sensing temperature of the temperature monitoring point when the phase change thermal storage module is in a charging mode, and determining a target sensing temperature from the module sensing temperature;

[0062] a processing module, configured to execute the high temperature protection mode on the phase change thermal storage module if the target sensing temperature is greater than or equal to a first preset control temperature;

[0063] The processing module is used for exiting the high temperature protection mode of the phase change thermal storage module if the target sensing temperature is lower than a second preset control temperature;

[0064] The first preset control temperature is the difference between the failure temperature of the phase change material and the first temperature coefficient, the second preset control temperature is the difference between the failure temperature of the phase change material and the second temperature coefficient, and the first temperature coefficient is smaller than the second temperature coefficient.

[0065] In a fifth aspect, an embodiment of the present application provides a computer storage medium, wherein the computer storage medium stores a plurality of instructions, wherein the instructions are suitable for being loaded by a processor and executing the above-mentioned method steps.

[0066] In a sixth aspect, an embodiment of the present application provides an electronic device, which may include: a processor and a memory; wherein the memory stores a computer program, and the computer program is suitable for being loaded by the processor and executing the above-mentioned method steps.

[0067] The beneficial effects brought about by the technical solutions provided by some embodiments of the present application include at least:

[0068] In one or more embodiments of the present application, the HVAC system includes a heat pump external unit and a phase change heat storage module, the heat pump external unit includes a control unit, the phase change heat storage module includes a charging inlet and a charging outlet, the charging inlet is connected to the heat source water outlet of the heat pump external unit, the charging outlet is connected to the heat source water inlet of the heat pump external unit, the heat pump external unit and the phase change heat storage module respectively form a charging flow path through the heat source water outlet, the charging inlet, the charging outlet and the heat source water inlet, at least one temperature monitoring point is configured in the phase change heat storage module, the phase change heat storage module includes at least a charging mode and a high temperature protection mode, and the control unit can pass When the phase change thermal storage module is in the charging mode, the module sensing temperature of the temperature monitoring point is monitored, and the target sensing temperature is determined from the module sensing temperature. If the target sensing temperature is greater than or equal to the first preset control temperature, the high temperature protection mode is executed for the phase change thermal storage module. If the target sensing temperature is less than the second preset control temperature, the phase change thermal storage module exits the high temperature protection mode, thereby achieving effective high temperature protection for the phase change thermal storage module in the HVAC system, avoiding the situation where the temperature of the phase change thermal storage module is too high, ensuring the normal operation of the system, and further ensuring the performance of the HVAC system. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0070] Figure 1 is a structural schematic diagram of a HVAC system provided in an embodiment of the present application;

[0071] Figure 2a This is a schematic diagram of the placement of temperature monitoring points provided in an embodiment of the present application;

[0072] Figure 2b is a schematic diagram of a water supply switch provided in an embodiment of the present application;

[0073] Figure 3 is a structural diagram of a phase change energy storage module provided in an embodiment of the present application;

[0074] Figure 4 A phase change characteristic diagram of a phase change material of a phase change energy storage module provided in an embodiment of the present application when the fins are vertical;

[0075] Figure 5 A temperature change diagram of a phase change material when a phase change energy storage module provided in an embodiment of the present application is in a heat storage stage;

[0076] Figure 6 A temperature change diagram of a phase change material when a phase change energy storage module provided in an embodiment of the present application is in a heat release stage;

[0077] Figure 7 A phase change characteristic diagram of a phase change material of a phase change energy storage module provided in an embodiment of the present application when the fins are horizontal;

[0078] Figure 8 A temperature change diagram of a phase change material when a phase change energy storage module provided in an embodiment of the present application is in a heat storage stage;

[0079] Fig. 9 A temperature change diagram of a phase change material when a phase change energy storage module provided in an embodiment of the present application is in a heat release stage;

[0080] Fig.10 A schematic diagram of the distribution of temperature monitoring points provided in a phase change energy storage module provided in an embodiment of the present application;

[0081] Fig.11 A distribution characteristic diagram of the temperature of a phase change material of a phase change energy storage module provided in an embodiment of the present application when in a heat storage state;

[0082] Fig.12 A distribution characteristic diagram of the temperature of a phase change material of a phase change energy storage module provided in an embodiment of the present application when in a heat release state;

[0083] Fig.13 It is a schematic flow chart of a high temperature protection method provided in an embodiment of the present application;

[0084] Fig.14 A schematic diagram of the structure of a heat storage device provided in an embodiment of the present application, in which a temperature sensing component is provided;

[0085] Fig.15 A schematic structural diagram of a heat storage device provided in an embodiment of the present application having a heat exchange module therein;

[0086] Fig.16 A schematic diagram of the structure of a heat exchange module from a first perspective provided in an embodiment of the present application;

[0087] Fig.17 A schematic diagram of the structure of a temperature sensing component provided in an embodiment of the present application;

[0088] Fig.18 for Fig.17 Schematic diagram of the cross-sectional structure at B-B in the middle;

[0089] Fig.19 for Fig.18 Schematic diagram of the enlarged structure at C in the middle;

[0090] Fig. 20 for Fig.18 Schematic diagram of the enlarged structure at D in the middle.

[0091] Fig.21 is a schematic structural diagram of a high temperature protection device provided in an embodiment of the present application;

[0092] Fig. 22 It is a structural schematic diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0093] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0094] In the description of the present application, it should be understood that the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood in specific circumstances. In addition, in the description of the present application, unless otherwise specified, "multiple" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B, which can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are an "or" relationship.

[0095] Phase change thermal storage module is a technical device that uses the characteristics of phase change materials (PCMs) to absorb or release a large amount of heat during the phase change process to store and release energy. Phase change materials can change from one physical state to another (such as solid to liquid, or liquid to solid) within a specific temperature range, and absorb or release a large amount of latent heat in the process, thereby realizing energy storage and supply. For example, the phase change thermal storage module can use the absorption / release characteristics of phase change materials to heat tap water to provide people with comfortable domestic hot water.

[0096] In order to solve the problem of high temperature protection of phase change thermal storage modules mentioned in the background technology, this specification provides a high temperature protection method, HVAC system and storage medium for one or more phase change thermal storage modules. The application is described in detail below in conjunction with specific embodiments.

[0097] Please refer to Figure 1 , the embodiment of the present application provides a HVAC system, wherein the HVAC system 1000 includes: a heat pump external unit 210 and a phase change thermal storage module 100;

[0098] The heat pump external unit 210 includes a control unit ( Figure 1 not shown);

[0099] The phase-change thermal storage module 100 includes a charging inlet 41 and a charging outlet 42, wherein the charging inlet 41 is connected to the heat source water outlet 71 of the heat pump external machine, and the charging outlet 42 is connected to the heat source water inlet 72 of the heat pump external machine. The heat pump external machine and the phase-change thermal storage module 100 respectively form a charging flow path 61 through the heat source water outlet 71, the charging inlet 41, the charging outlet 42 and the heat source water inlet 72. One or more charging flow paths 61 may be arranged in the phase-change thermal storage module 100;

[0100] Optionally, in some embodiments, the phase change thermal storage module 100 further includes an energy release outlet 51 and an energy release inlet 52, and the flow path between the energy release outlet 51 and the energy release inlet 52 constitutes an energy release flow path 62. One or more energy release flow paths 62 may be arranged in the phase change thermal storage module 100;

[0101] The heat pump external unit 210 can be connected to the charging flow path 61 through the charging inlet 41 and the charging outlet 42. The hot fluid in the heat pump external unit 210 can flow into the charging flow path 61. The charging flow path 61 can transfer heat to the phase change material in the phase change thermal storage module 100. After the cold water flows into the energy release flow path 62 through the energy release inlet 52, it can absorb the heat of the phase change material. After the cold water is heated into hot water, it can flow out through the energy release outlet 51 for user use; optionally, the HVAC system 1000 provided in the present application can provide users with clean hot water without setting up a water tank to store hot water.

[0102] Specifically, in one or more embodiments of the present specification, at least one temperature monitoring point is configured in the phase change thermal storage module 100, and the phase change thermal storage module 100 includes at least a charging mode and a high temperature protection mode;

[0103] Specifically, the control unit is configured as follows:

[0104] When the phase change thermal storage module 100 is in the charging mode, the module sensing temperature of the temperature monitoring point is monitored, and the target sensing temperature is determined from the module sensing temperature;

[0105] If the target sensing temperature is greater than or equal to the first preset control temperature, the high temperature protection mode is executed on the phase change thermal storage module;

[0106] If the target sensing temperature is lower than the second preset control temperature, the phase change thermal storage module exits the high temperature protection mode;

[0107] The first preset control temperature is the difference between the failure temperature of the phase change material and the first temperature coefficient, the second preset control temperature is the difference between the failure temperature of the phase change material and the second temperature coefficient, and the first temperature coefficient is smaller than the second temperature coefficient.

[0108] Schematically, the charging mode of the phase change thermal storage module: according to the thermal energy situation of the thermal storage module, the charging flow path is started / closed. For example, when the phase change thermal storage module 100 is in the charging mode, the charging flow path is started / closed, and the heat pump external unit 210 can use a circulating pump to push the heating medium from the heat pump external unit 210 to the phase change thermal storage module 100, so as to transfer heat to the phase change thermal storage module 100. The energy release mode of the phase change thermal storage module: according to user needs, the energy release flow path is started / closed, and the heat in the thermal storage module heats the water in the energy release flow path;

[0109] Optionally, the circulating pump is a small-lift pump. When the phase change thermal storage module 100 is not charged, only a small amount of fluid flows in the charging flow path. According to the design conditions of the minimum flow rate of the charging flow path, the use of the corresponding small-lift pump can reduce energy consumption and extend the service life of the pump. Optionally, the charging flow path of the HVAC system also includes other pump equipment (large-lift pumps). When the phase change thermal storage module 100 is charged, a large amount of heat needs to be quickly transferred to the phase change thermal storage module 100. Therefore, the charging flow path requires a higher flow rate to ensure that the heating medium can be quickly charged. The use of a large-lift pump can provide sufficient flow and pressure to ensure that the heat generated by the heat pump external unit 210 is efficiently transferred to the phase change thermal storage module 100.

[0110] Optionally, one or more temperature monitoring points are configured in the phase change thermal storage module 100. For example, the temperature monitoring point may be a temperature sensing device such as a temperature sensor or a temperature sensing package, and the temperature monitoring point is arranged in the phase change thermal storage module 31; the module sensing temperature sensed by the temperature sensing device may be uploaded to the control unit in real time or periodically, so that the control unit monitors the module sensing temperature at the temperature monitoring point;

[0111] Indicatively, Figure 2a As shown, Figure 2a This is a schematic diagram of the layout of temperature monitoring points. Figure 2a In the embodiment, a temperature monitoring point 3 is set at the water inlet of the phase change thermal storage module 100, a temperature monitoring point 4 is set at the bottom of the module of the phase change thermal storage module 100, and temperature sensing packages are arranged at the temperature monitoring points 3 and 4. The temperature sensing packages can monitor the temperature data of the location in real time or periodically and upload it to the control unit;

[0112] The control unit monitors the module sensing temperature of one or more temperature monitoring points, and can determine the target sensing temperature from the module sensing temperature. The target sensing temperature can be a maximum sensing temperature of the module sensing temperature, a minimum temperature value of the module sensing temperature, an average temperature value of the module sensing temperature, a mode of the module sensing temperature, a median of the module sensing temperature, or one or more fittings thereof;

[0113] In a feasible implementation manner, the target sensing temperature is the maximum sensing temperature among all module sensing temperatures.

[0114] The phase change material failure temperature can be understood as the temperature at which the phase change material in the phase change thermal storage module 100 is in a failure state;

[0115] Exemplarily, the failure temperature of the phase change material is expressed as T_failure, the first temperature coefficient is expressed as △T2, and the second temperature coefficient is expressed as △T1. Then the first preset control temperature can be expressed as T_failure-△T2; the second preset control temperature can be expressed as T_failure-△T1, wherein the first temperature coefficient is smaller than the second temperature coefficient.

[0116] Specifically, the first temperature coefficient and the second temperature coefficient can be customized based on the actual application environment. The first temperature coefficient is the coefficient for entering the high temperature protection mode at the temperature set for turning on the high temperature protection mode, and the second temperature coefficient is the coefficient for exiting the high temperature protection mode at the temperature set for exiting the high temperature protection mode.

[0117] Furthermore, if the target sensing temperature is greater than or equal to the first preset control temperature, the control unit executes the high temperature protection mode for the phase change thermal storage module; if the target sensing temperature is less than the second preset control temperature, the control unit exits the high temperature protection mode for the phase change thermal storage module;

[0118] In one or more embodiments of the present specification, when the phase change thermal storage module is in the charging mode, the module sensing temperature of the temperature monitoring point is monitored, and the target sensing temperature is determined from the module sensing temperature. If the target sensing temperature is greater than or equal to the first preset control temperature, the high temperature protection mode is executed for the phase change thermal storage module. If the target sensing temperature is less than the second preset control temperature, the phase change thermal storage module exits the high temperature protection mode, thereby achieving effective high temperature protection for the phase change thermal storage module in the HVAC system, avoiding the situation where the temperature of the phase change thermal storage module is too high, ensuring the normal operation of the system, and further ensuring the performance of the HVAC system.

[0119] In a feasible implementation manner, the high temperature protection mode includes supplying water to cool the phase change thermal storage module and reducing the frequency of the heat pump external unit.

[0120] Schematically, the heat pump external unit 210 is connected to the phase change thermal storage module 100 through the charging flow path 61. The charging flow path 61 is controlled to supply water and cool the phase change thermal storage module to reduce the temperature of the phase change thermal storage module, and the operating frequency of the heat pump external unit 210 is reduced to reduce the working heat of the phase change thermal storage module, so as to avoid the situation where the temperature of the phase change thermal storage module is too high to ensure the normal operation of the system, thereby ensuring the performance of the HVAC system.

[0121] In a feasible implementation manner, the heat pump external unit 210 includes a water pump and a compressor, and the control unit is configured as follows:

[0122] The water pump is controlled based on the maximum water output to supply water and cool the phase change thermal storage module, and the compressor is frequency-reduced based on a preset cycle and a preset adjustment frequency.

[0123] Schematically, the heat pump external unit 210 is connected to the phase change thermal storage module 100 through the charging flow path 61, and the control unit increases the water supply of the charging flow path 61 through the water pump to supply water to the phase change thermal storage module for cooling down the temperature of the phase change thermal storage module; and the control unit reduces the frequency of the compressor based on a preset cycle and a preset adjustment frequency, and the operating frequency of the heat pump external unit 210 will be reduced, thereby reducing the working heat generated by the phase change thermal storage module, thereby rapidly cooling the phase change thermal storage module.

[0124] In a specific implementation scenario, the control unit detects the module sensing temperature measured by the temperature sensing package at one or more temperature monitoring points in the phase change thermal storage module 100, and determines the maximum temperature value T_max from the module sensing temperature as the target sensing temperature.

[0125] ① When the target sensing temperature T_max≥T_failure-△T2 is detected in actual operation, the high temperature protection logic control is triggered to execute the high temperature protection mode for the phase change thermal storage module. For example, in the high temperature protection mode, the control unit controls the water pump to operate at the maximum water output, increases the water supply of the charging flow path 61, so as to quickly supply water and cool the phase change thermal storage module, ensure that the heat in the phase change material module is quickly discharged, and reduce the temperature of the phase change thermal storage module; and control the compressor to reduce the frequency, and continuously reduce the preset adjustment frequency (such as 6hz) according to the preset period (such as every 2 minutes) for frequency reduction processing to reduce heat generation in the system and prevent the temperature from continuing to rise.

[0126] ②Continuously monitor the target sensing temperature; when the target sensing temperature T_max<T_failure-△T1 is detected during actual operation, the high temperature protection mode is exited. The target sensing temperature T_max<T_failure-△T1 can be understood as the temperature of the phase change material has been reduced to a safe range, and the high temperature protection logic control can be exited. The HVAC system operates normally, for example, the water pump and compressor return to normal operating state and continue to operate according to conventional logic.

[0127] The above method realizes efficient high-temperature protection. By real-time detection of the target sensing temperature of the phase change thermal storage module, the system can trigger the high-temperature protection logic in time before the target sensing temperature reaches the critical point, thereby avoiding performance degradation of the phase change material due to excessive temperature and extending the service life of the phase change material module; and, a flexible frequency reduction mechanism is realized. Through the gradual frequency reduction of the compressor, heat generation is effectively reduced in the high-temperature protection process, which not only avoids the impact of excessive frequency reduction on system operation, but also ensures that the temperature can be gradually controlled within a safe range; and, a stable exit logic of the high-temperature protection mode is realized. When the target sensing temperature falls back to a safe range, the high-temperature protection logic can be automatically exited and the normal operating state can be restored, ensuring that users have a good user experience without affecting the normal use of the equipment.

[0128] In a feasible implementation, considering that the phase change thermal storage module continues to overheat, shutdown protection may be performed. Further, the control unit is configured as follows:

[0129] If the target sensing temperature is greater than or equal to the third preset control temperature, monitoring the duration of the state in the target temperature state;

[0130] If the state lasts longer than the first preset time, the shutdown protection mode is executed;

[0131] The target temperature state is a temperature state when the target sensing temperature is greater than or equal to a third preset control temperature, and the third preset control temperature is a difference between a failure temperature of the phase change material and a third temperature coefficient.

[0132] Exemplarily, the failure temperature of the phase change material is expressed as T_failure, the third temperature coefficient is expressed as △T3, and the third preset control temperature can be expressed as T_failure-△T3. When the actual operation detects that the target sensing temperature is ≥T_failure-△T3, and it lasts for the first preset time t1, the control unit generates a shutdown signal to control the heat pump outdoor unit of the HVAC system to execute the shutdown protection mode and perform shutdown processing, and further outputs fault alarm information to the outside.

[0133] Optionally, the value range of t1 is: 30s to 60s. At this time, the continuous overheating of the phase change thermal storage module can be effectively avoided. The first preset time length has high accuracy and strong sensitivity for the shutdown protection effect.

[0134] In a feasible implementation manner, the third temperature coefficient is greater than or equal to 3 and the third temperature coefficient is less than 6.

[0135] Through creative work, setting the third temperature coefficient to be greater than or equal to 3 and the third temperature coefficient to be less than 6 can bring the following beneficial effects:

[0136] Through creative work, the third temperature coefficient is set between 3℃ and 6℃, which can ensure that the shutdown protection is triggered in time when the temperature is close to the failure temperature of the phase change material. The setting of this temperature range leaves a reasonable buffer space for the system to prevent the temperature from rising rapidly to the failure temperature, while avoiding premature shutdown, thereby improving the accuracy and reliability of high temperature protection; and reducing the number of unnecessary shutdowns. The third temperature coefficient is set to avoid frequent shutdowns due to being too small, affecting the normal operation of the equipment, and is set to between 3℃ and 6℃, ensuring that the shutdown protection is triggered only when the temperature approaches the dangerous range, avoiding unnecessary shutdowns, and improving the stability and work efficiency of the system; and protecting the performance of the phase change material. It has been verified that the temperature range set between 3℃ and 6℃ is sensitive enough to be able to shut down in time before the material performance is irreversibly damaged, preventing the attenuation and failure of the phase change material, thereby extending the service life of the system.

[0137] In a possible implementation, Figure 2b As shown, Figure 2b This is a schematic diagram of a water supply switch, such as Figure 2b As shown, the HVAC system 1000 includes a water supply switch 81, which is connected to the heat source water outlet 71 and the charging inlet 41 respectively.

[0138] A control unit configured to:

[0139] After the shutdown protection mode is executed, the water supply switch 81 is controlled to be in a closed state, and the charging flow path 61 is in a flow path disconnected state in the closed state.

[0140] Schematically, the water supply switch 81 is connected to the heat source water outlet 71 and the charging inlet 41. When the HVAC system operates normally, the water supply switch controls the hot fluid to flow into the charging flow path 61 so as to transfer heat to the phase change material for heat storage.

[0141] Optionally, the water supply switch 81 includes but is not limited to a solenoid valve, a ball valve, a butterfly valve, a regulating valve, etc.

[0142] After the shutdown protection mode is executed, when the fault alarm heat pump outdoor unit is shut down, the control unit is responsible for closing the water supply switch 81. When the water supply switch is in the closed state, the charging flow path 61 is disconnected, and the thermal fluid in the heat pump outdoor unit can no longer flow into the phase change thermal storage module 100, cutting off the water flow to the phase change thermal storage module, thereby stopping the charging process. This process can effectively protect the system, prevent the phase change material from continuing to be heated under high temperature, avoid further heating of the system or damage, and effectively prevent the system from overheating and protect the life of the equipment.

[0143] In a feasible implementation manner, the control unit is configured as follows:

[0144] monitoring the water supply shut-off duration and the target sensed temperature;

[0145] If the water supply shutdown time is longer than the second preset time and the target sensing temperature is lower than the second preset control temperature, the shutdown protection mode is exited.

[0146] The water supply off time is the duration of the water supply switch 81 being in the off state;

[0147] Specifically, the control unit continuously monitors the water supply shutdown time and the target sensing temperature when the water supply switch 81 is closed. Through these two parameters, the control unit can determine the current state, especially whether the heat pump outdoor unit can safely resume operation after entering the shutdown protection mode. If it is detected that the water supply shutdown time exceeds the second preset time t2, and the target sensing temperature has dropped below the second preset control temperature "T_failure-△T1", the control unit will automatically exit the shutdown protection mode. At this time, it is judged that the current temperature and time conditions have reached the safe range, allowing normal operation to resume.

[0148] For example, when the target temperature is detected to be less than T_failure-ΔT1 for a second preset time period t2 (such as 3 minutes), the fault is eliminated and the system returns to normal.

[0149] Further, if the water supply shut-off time is less than or equal to the second preset time, and / or the target sensing temperature is greater than or equal to the second preset control temperature, the shutdown protection mode is maintained;

[0150] In this manual, by monitoring the water supply shutdown duration and the target sensing temperature, the operating status can be dynamically adjusted to ensure that the system operates within a safe temperature range, effectively avoiding the risk of overheating; after detecting that the system conditions are safe, the control unit can automatically exit the shutdown protection mode, realizing automated control and avoiding manual intervention, ensuring the continuity and efficiency of the system, and improving the user experience; and, by determining whether to exit the shutdown protection mode based on specific temperature and time conditions, it can quickly resume operation when the safe temperature is reached, reducing unnecessary downtime and improving overall operating efficiency.

[0151] In a feasible implementation manner, the control unit is configured as follows:

[0152] A system restart command is detected to exit shutdown protection mode.

[0153] Indicatively, the control unit has the function of detecting a system restart instruction. When operating in the shutdown protection mode, if it is detected that the user or the system has issued a system restart instruction, the control unit will automatically respond and exit the current shutdown protection mode.

[0154] Furthermore, once the control unit detects a system restart command, it will terminate the shutdown protection state and restore the normal operation of the system. This allows for a quick restart when a user or maintenance personnel issues a clear restart command, without waiting for temperature or time conditions to be met.

[0155] In this manual, by exiting the shutdown protection mode immediately after receiving the system restart command, the user or maintenance personnel can manually control the system restart time as needed, which increases the flexibility of the system and adapts to the needs of rapid recovery in emergency situations; and the detection of the system restart command can significantly reduce the downtime in the protection mode. In some cases, the user may want to force the system to restart when the temperature has not fully recovered. This function can meet such needs and improve the operability of the system; and, allowing the user to exit the protection mode through the system restart command according to the actual situation, provides the user with higher control rights, enables the system to recover immediately when needed, and enhances the user's experience and operational convenience.

[0156] In a feasible implementation, the HVAC system 1000 may not be configured with the water supply switch 81 to implement the post-high temperature protection logic, and the control unit is configured as follows:

[0157] 1) After the shutdown protection mode is executed, if the state lasts for a period longer than a third preset period, the system cooling mode is turned on;

[0158] Indicatively, after the shutdown protection mode is executed, the heat pump outdoor unit 210 fault alarm compressor is shut down, the target sensing temperature is continuously monitored, and the duration of the state in the target temperature state is detected. The target temperature state is the temperature state when the target sensing temperature is greater than or equal to the third preset control temperature "T_failure-△T3".

[0159] For example, when the target temperature is detected to be ≥T_failure-△T3 (3≤△T3≤6) and lasts for t3 (3min), the control unit starts in cooling mode and continues to process the fault alarm, and the high temperature protection alarm signal of the heat pump outdoor unit is turned on;

[0160] The cooling mode of the heat pump outdoor unit 210 is turned on to reduce the temperature of the phase change thermal storage module in the HVAC system through cooling operation to prevent the phase change thermal storage module from being overheated and causing damage to the phase change material or other components.

[0161] 2) If the target sensing temperature is lower than the second preset control temperature, the system cooling mode is exited.

[0162] Optionally, when the target temperature is less than the second preset control temperature "T_failure-△T1", the system exits the cooling mode, and the target temperature is detected to be less than the second preset control temperature "T_failure-△T1" for the fourth preset time t4 (such as 3 minutes), and the high temperature protection alarm signal is switched from the on state to the off state; the fault alarm is turned off, and normal control operation is restored, and the fault accumulation is +1. When the accumulated high temperature protection alarm signal within the fifth preset time t5 (such as 1h) is greater than the fault threshold n (such as 3 times), the fault alarm cannot be automatically restored (the high temperature protection alarm information is switched to the on state), and power supply recovery is required.

[0163] In this specification, there is no need to configure additional hardware (such as the water supply switch 81), and the system can still implement the anti-high temperature protection logic through the control unit, reducing hardware dependence and enhancing the system's adaptability to various application scenarios. In particular, when the water supply control is complex or unavailable, the system can still ensure system safety, improve the flexibility of system design, reduce hardware costs, and make the system simpler and easier to maintain: and the system can automatically switch to cooling mode according to temperature and time conditions to prevent the system from being in a high temperature state for a long time. This automatic control improves the system's self-protection capability and ensures safe operation under high temperature conditions; and, by exiting the system cooling mode when the target sensing temperature is lower than the second preset control temperature, unnecessary cooling process is avoided, which helps to save energy in the system under the high temperature protection logic and improves the system's operating efficiency.

[0164] In a feasible implementation manner, the first temperature coefficient is greater than or equal to 6 and less than 10, and the second temperature coefficient is less than 15 and greater than 10.

[0165] Schematically, the setting of the first temperature coefficient and the second temperature coefficient realizes the optimization of the sensitivity of temperature control. The first temperature coefficient is set to be greater than or equal to 6 and less than 10. The first temperature coefficient is the trigger point for the control system to enter the high temperature protection logic. The range is set to 6°C to 10°C to ensure that the system enters the protection state in time before the temperature approaches the dangerous critical point. This range is neither too sensitive to cause frequent triggering, nor too loose to cause a response only when the temperature is too high; the second temperature coefficient is used to determine the temperature point for exiting the high-temperature protection logic, and it is set to the range of 10°C to 15°C to ensure that the system exits the high-temperature protection state in time within the temperature safety range, avoiding premature recovery and repeated temperature increases; and the setting of the first temperature coefficient and the second temperature coefficient can prevent excessive temperature fluctuations. By setting the first temperature coefficient to 6°C to 10°C, the system can be prevented from triggering protection only when the temperature is close to the failure temperature of the phase change material, thereby effectively controlling the temperature rise and avoiding over-temperature problems. The range of the second temperature coefficient is set between 10°C and 15°C, so that the system will not exit protection immediately when the temperature drops slightly, but ensure that the temperature is stable within a safe range, thereby reducing frequent temperature fluctuations and ensuring smooth operation of the system; and it can improve the safety and stability of the system and reduce energy consumption.

[0166] In a feasible implementation manner, the phase-change thermal storage module includes a first temperature distribution region and a second temperature distribution region set for the phase-change material, and the temperature of the first temperature distribution region is greater than the temperature of the second temperature distribution region;

[0167] The first temperature distribution area is configured with at least one first temperature monitoring point, the second temperature distribution area is configured with at least one second temperature monitoring point, and the module sensing temperature includes a first module sensing temperature corresponding to the first temperature monitoring point and a second module sensing temperature corresponding to the second temperature monitoring point.

[0168] Schematically, the phase change material in the phase change thermal storage module has a first temperature distribution region and a second temperature distribution region, and the temperature of the first temperature distribution region is greater than the temperature of the second temperature distribution region;

[0169] It should be noted that the temperature distribution of the phase change material in the phase change energy storage module is uneven. Specifically, inside the phase change energy storage module, a temperature gradient will be formed along the direction of the charging flow path (i.e., the path of energy flow or transfer), and the temperature value corresponding to the temperature gradient decreases along the direction of the charging flow path. Therefore, in this application, the phase change material is divided into multiple temperature distribution areas according to its temperature gradient (i.e., temperature change). That is, the first temperature distribution area and the second temperature distribution area are set based on the temperature gradient distribution in the direction of the charging flow path in the phase change energy storage module.

[0170] In one possible implementation, in an embodiment of the present application, when determining the first temperature distribution area and the second temperature distribution area of ​​the phase change material, the phase change material is divided into multiple temperature distribution areas according to the flow direction of the heat medium; the area with the highest temperature among the multiple temperature distribution areas is taken as the first temperature distribution area; and the area with the lowest temperature among the multiple temperature distribution areas is taken as the second temperature distribution area.

[0171] That is, the first temperature distribution region is a region corresponding to the highest temperature gradient in the phase change material, and the second temperature distribution region is a region corresponding to the lowest temperature in the phase change material.

[0172] In a feasible implementation manner, the first temperature distribution area and the second temperature distribution area are set based on the temperature gradient distribution in the charging flow path direction in the phase change thermal storage module.

[0173] In order to illustrate the situation where there is a temperature gradient in the phase change material provided in the embodiments of the present application, please refer to the following Figures 3 to 6 This part uses the phase change energy storage module with the fins vertical to illustrate the temperature distribution in the phase change material, as follows:

[0174] Please refer to Figure 3 , Figure 3 A structural diagram of a phase change energy storage module provided in an embodiment of the present application. The phase change energy storage module is mainly composed of 1 to 5 components, of which 1 is a heat exchanger, 2 is a phase change material, 3 and 4 are temperature sensors, corresponding to the high temperature zone T5 and the low temperature zone T5_2 respectively, and 5 is a packaging shell. T5 is set at 0.95h0<h<h0 (with the end close to the inlet of the heat release medium as the starting point and the end close to the outlet of the heat release medium as the end point, and h0 is the height of the phase change material), and T5_2 is set at 0.05h0<h<0.15h0.

[0175] It should be noted that the first temperature distribution area in the present application is obtained based on the high temperature zone, and the second temperature distribution area is obtained based on the low temperature zone. For example, the high temperature zone can be used as the first temperature distribution area, and the low temperature zone can be used as the second temperature distribution area. Or, for example, the high temperature zone can be further divided into multiple high temperature sub-areas according to the temperature distribution, and the high temperature sub-area with the highest corresponding distribution temperature can be used as the first temperature distribution area. The low temperature zone can be further divided into multiple low temperature sub-areas according to the temperature distribution, and the low temperature sub-area with the lowest corresponding distribution temperature can be used as the second temperature distribution area.

[0176] Please refer to Figure 4 , Figure 4 Based on Figure 3The phase change characteristic diagram of the phase change material of the phase change energy storage module provided in the case of vertical fins shows the phase change energy storage module in the heat storage stage and the heat release stage when the fins are vertical. Specifically:

[0177] (1) When the phase change energy storage module is in the heat storage stage, the high-temperature fluid flows from top to bottom along the pipeline. The phase change material in the high-temperature zone first changes from solid to liquid. As the heat storage process proceeds, the high-temperature zone moves along the direction of the fluid, and the phase change energy storage module is in a solid-liquid two-phase state for a long time. However, since most of the heat of the high-temperature fluid is absorbed by the phase change material, the temperature of the second half of the fluid drops sharply, which ultimately makes it difficult for the phase change material in the second half to completely change phase during the heat storage process, so it is defined as a low-temperature zone.

[0178] Please refer to Figure 5 , Figure 5 Based on Figure 4 The temperature change diagram of the phase change material when the phase change energy storage module is in the heat storage stage when the fins are vertical.

[0179] ① The phase change period of the phase change material during the heat storage process accounts for about 80% of the total heat storage time;

[0180] ② When the heat storage reaches 90% of the total, the temperature of the phase change material in the 0≤h≤0.15h0 segment (point A, temperature points 17-19) is lower than the phase change temperature, and the high area is a low temperature zone; the temperature of the phase change material in the 0.15h0<h≤h0 segment is higher than the phase change temperature.

[0181] ③T5_2 is at h>0.15h0, and the temperature of the phase change material reaches the set value ahead of time, resulting in the premature end of heat storage and a decrease in heat storage;

[0182] ④T5_2 is at h<0.05h0, the high-temperature medium temperature at the end of the heat exchanger is low, and the phase change material temperature at 0~0.05h0 is lower than the phase change temperature for a long time, resulting in the risk of overcharging or even overheating of the phase change energy storage module;

[0183] ⑤T5_2 should be placed in the height range of 0.05~0.15h0.

[0184] (2) When the phase-change energy storage module is in the heat release stage, the low-temperature fluid flows from bottom to top along the pipeline, and the phase-change material in the low-temperature zone changes from liquid to solid first. As the heat release process proceeds, the low-temperature zone moves along the direction of the fluid, and the phase-change energy storage module is in a solid-liquid two-phase state for a long time. However, because the low-temperature fluid absorbs the heat of the phase-change material, the temperature of the second half of the fluid rises sharply, which ultimately causes the second half of the phase-change material to remain at a higher temperature during the heat release process, so it is defined as a high-temperature zone.

[0185] Please refer to Figure 6, Figure 6 Based on Figure 4 The temperature change diagram of the phase change material when the phase change energy storage module is in the heat release stage when the fins are vertical.

[0186] ① The phase change temperature in the heat release process accounts for more than 95% of the total heat release time;

[0187] ② When the heat release reaches 90% of the total, the temperature of the phase change material in the 0.95h0<h≤h0 segment (temperature point 1) is greater than the phase change temperature, and this area is a high temperature zone; the temperature of the phase change material in 0≤h≤0.95h0 is lower than the phase change temperature.

[0188] ③T5 position is at h>h0, and the monitored temperature is the air temperature. Due to the low thermal conductivity of air, the temperature of the phase change material may exceed the limit, but the temperature of T5 is still within the protection range;

[0189] ④The T5 position is at h<0.95h0. The position is too low, resulting in insufficient heat release and large residual heat.

[0190] ⑤T5 should be placed in the height range of 0.95h0~h0.

[0191] Among them, the definition and feedback of high temperature zone and low temperature zone will affect the judgment of heat storage and heat release degree of phase change energy storage module.

[0192] It should be noted that the "fluid" in the "high-temperature fluid" and "low-temperature fluid" mentioned here refers to the medium that needs to be heated in the pipeline of the phase change energy storage module. For example, when hot water is supplied through the phase change energy storage module, the fluid can be water, such as municipal tap water.

[0193] Next, in order to illustrate the situation where there is a temperature gradient in the phase change material provided in the embodiment of the present application, please refer to the following Figure 3 ,as well as Figures 7 to 9 This part describes the temperature distribution of the phase change material in the phase change energy storage module when the fins are horizontal, as follows:

[0194] Please refer to Figure 7 , based on Figure 3 The phase change characteristic diagram of the phase change material of the phase change energy storage module provided in the fin horizontal condition shows the phase change energy storage module in the heat storage stage and the heat release stage when the fin is horizontal, specifically:

[0195] (1) When the phase change energy storage module is in the heat storage stage, the high-temperature fluid flows from right to left along the pipeline. The phase change material in the high-temperature zone first changes from solid to liquid. As the heat storage process proceeds, the high-temperature zone moves along the direction of the fluid, and the phase change energy storage module is in a solid-liquid two-phase state for a long time. However, since most of the heat of the high-temperature fluid is absorbed by the phase change material, the temperature of the second half of the fluid drops sharply, which ultimately makes it difficult for the phase change material in the second half to completely change phase during the heat storage process, so it is defined as a low-temperature zone.

[0196] Please refer to Figure 8 , Figure 8 Based on Figure 7 The temperature change diagram of the phase change material when the phase change energy storage module is in the heat storage stage when the fins are horizontal.

[0197] ① The phase change period of the phase change material during the heat storage process accounts for about 80% of the total heat storage time;

[0198] ② When the heat storage reaches 95% of the total, the temperature of the phase change material in the 0≤h≤0.15h0 segment (temperature points 1-3) is lower than the phase change temperature, and this area is a low temperature zone; the temperature of the phase change material in the 0.9h0<h≤h0 segment is higher than the phase change temperature.

[0199] ③ At the T5_2 position, h>0.15h0, the material reaches the set temperature ahead of time, causing the heat storage to end early and the heat storage amount to decrease.

[0200] (2) When the phase-change energy storage module is in the heat release stage, the low-temperature fluid flows from left to right along the pipeline, and the phase-change material in the low-temperature zone first changes from liquid to solid. As the heat release process proceeds, the low-temperature zone moves along the direction of the fluid, and the phase-change energy storage module is in a solid-liquid two-phase state for a long time. However, because the low-temperature fluid absorbs the heat of the phase-change material, the temperature of the second half of the fluid rises sharply, which ultimately causes the second half of the phase-change material to remain at a higher temperature during the heat release process, so it is defined as a high-temperature zone.

[0201] Please refer to Fig. 9 , Fig. 9 Based on Figure 7 The temperature change diagram of the phase change material when the phase change energy storage module is in the heat release stage when the fins are horizontal.

[0202] ① The phase change temperature in the heat release process accounts for more than 95% of the total heat release time;

[0203] ② When the outlet water temperature is less than 40°C, the temperature of the phase change material in the 0.90h0<h≤h0 segment (temperature point 1) is greater than the phase change temperature, and this area is a high temperature zone; the temperature of the phase change material in 0≤h≤0.90h0 is less than the phase change temperature.

[0204] ③The T5 position is at h<0.90h0. The position is too low, resulting in insufficient heat release and large residual heat.

[0205] ④T5 should be placed in the height range of 0.90h0~h0.

[0206] Among them, the definition and feedback of high temperature zone and low temperature zone will affect the judgment of heat storage and heat release degree of phase change energy storage module.

[0207] It should be noted that the "fluid" in the "high-temperature fluid" and "low-temperature fluid" mentioned here refers to the medium that needs to be heated in the pipeline of the phase change energy storage module. For example, when hot water is supplied through the phase change energy storage module, the fluid can be water, such as municipal tap water.

[0208] In addition, in one possible implementation, please refer to Fig.10 , Fig.10 A schematic diagram of the distribution of temperature monitoring points provided in a phase change energy storage module provided in an embodiment of the present application. Fig.10 The diagram in the figure shows the setting of the internal temperature monitoring points of the phase change energy storage module when the fins are vertical.

[0209] ① The tube-fin heat exchanger is placed in such a way that the tube is parallel to the bottom of the inner tank and the fin is perpendicular to the bottom;

[0210] ②The heat release and heat storage flow paths are arranged in parallel and spaced apart, and countercurrent heat exchange is adopted;

[0211] ③ During the heat storage process of the phase change energy storage module, the fluid flows from top to bottom, and during the heat release process, the fluid flows from bottom to top;

[0212] ④ Due to the flow direction of the heat transfer medium of the phase change energy storage module, the module temperature is distributed longitudinally;

[0213] In order to monitor the temperature of the internal materials of the phase change energy storage module, 9 temperature monitoring points are set from bottom to top along the same normal line. Each temperature monitoring point corresponds to a temperature sensor. The temperature sensors are numbered 1 to 9 from top to bottom and are placed at 90% to 10% of the height of the phase change energy storage module. It can be understood that 9 temperature sensors are evenly distributed in the phase change energy storage module to detect the temperature of the phase change materials corresponding to different heights.

[0214] It should be noted that the 9 temperature monitoring points set here are only for example. In actual situations, other numbers of temperature monitoring points can be set according to actual scenarios, and no specific limitation is made here.

[0215] For further information, please refer to Fig.11 , Fig.11 Based on Fig.10The distribution of temperature monitoring points provided in the figure shows the distribution characteristic diagram of the temperature of the phase change material of the phase change energy storage module when it is in the heat storage state. Fig.11 Indicated in Fig.10 The temperature distribution of the phase change material at the 9 temperature monitoring points set when the phase change energy storage module is in the heat storage stage.

[0216] And refer to Fig.12 , Fig.12 Based on Fig.10 The distribution of temperature monitoring points provided in the figure shows the distribution characteristic diagram of the temperature of the phase change material of the phase change energy storage module when it is in the heat release state. Fig.12 Indicated in Fig.10 The temperature distribution of the phase change material at the 9 temperature monitoring points set when the phase change energy storage module is in the heat release stage.

[0217] In one or more embodiments of this specification, Fig.13 As shown, a high temperature protection method is proposed, which can be implemented by a computer program and can be run on a high temperature protection device based on the von Neumann system. The computer program can be integrated into an application or run as an independent tool application. Specifically, the high temperature protection method is applied to a HVAC system, including a heat pump outdoor unit, a phase change thermal storage module, and the control unit.

[0218] The heat pump external unit includes a control unit;

[0219] A phase-change thermal storage module, wherein the phase-change thermal storage module comprises a charging inlet and a charging outlet, wherein the charging inlet is connected to a heat source water outlet of the heat pump external unit, and the charging outlet is connected to a heat source water inlet of the heat pump external unit, wherein the heat pump external unit and the phase-change thermal storage module respectively form a charging flow path through the heat source water outlet, the charging inlet, the charging outlet and the heat source water inlet, wherein at least one temperature monitoring point is arranged in the phase-change thermal storage module, and the phase-change thermal storage module comprises at least a charging mode and a high temperature protection mode;

[0220] Further, the high temperature protection method comprises:

[0221] S102: When the phase change thermal storage module is in a charging mode, monitoring the module sensing temperature of the temperature monitoring point, and determining a target sensing temperature from the module sensing temperature;

[0222] Charging mode of the phase change thermal storage module: according to the thermal energy situation of the thermal storage module, the charging flow path is started / closed. For example, when the phase change thermal storage module 100 is in the charging mode, the charging flow path is started / closed, and the heat pump external unit 210 can use a circulating pump to push the heating medium from the heat pump external unit 210 to the phase change thermal storage module 100, so as to transfer heat to the phase change thermal storage module 100. Discharging mode of the phase change thermal storage module: according to user needs, the discharging flow path is started / closed, and the heat in the thermal storage module heats the water in the discharging flow path;

[0223] Optionally, the circulating pump is a small-lift pump. When the phase change thermal storage module 100 is not charged, only a small amount of fluid flows in the charging flow path. According to the design conditions of the minimum flow rate of the charging flow path, the use of the corresponding small-lift pump can reduce energy consumption and extend the service life of the pump. Optionally, the charging flow path of the HVAC system also includes other pump equipment (large-lift pumps). When the phase change thermal storage module 100 is charged, a large amount of heat needs to be quickly transferred to the phase change thermal storage module 100. Therefore, the charging flow path requires a higher flow rate to ensure that the heating medium can be quickly charged. The use of a large-lift pump can provide sufficient flow and pressure to ensure that the heat generated by the heat pump external unit 210 is efficiently transferred to the phase change thermal storage module 100.

[0224] Optionally, one or more temperature monitoring points are configured in the phase change thermal storage module 100. For example, the temperature monitoring point may be a temperature sensing device such as a temperature sensor or a temperature sensing package, and the temperature monitoring point is arranged in the phase change thermal storage module 31; the module sensing temperature sensed by the temperature sensing device may be uploaded to the control unit in real time or periodically, so that the control unit monitors the module sensing temperature at the temperature monitoring point;

[0225] The control unit monitors the module sensing temperature of one or more temperature monitoring points, and can determine the target sensing temperature from the module sensing temperature. The target sensing temperature can be a maximum sensing temperature of the module sensing temperature, a minimum temperature value of the module sensing temperature, an average temperature value of the module sensing temperature, a mode of the module sensing temperature, a median of the module sensing temperature, or one or more fittings thereof;

[0226] In a feasible implementation manner, the target sensing temperature is the maximum sensing temperature among all module sensing temperatures.

[0227] S104: If the target sensing temperature is greater than or equal to a first preset control temperature, executing the high temperature protection mode for the phase change thermal storage module;

[0228] S106: If the target sensing temperature is lower than a second preset control temperature, exiting the high temperature protection mode for the phase change thermal storage module;

[0229] The first preset control temperature is the difference between the failure temperature of the phase change material and the first temperature coefficient, the second preset control temperature is the difference between the failure temperature of the phase change material and the second temperature coefficient, and the first temperature coefficient is smaller than the second temperature coefficient.

[0230] The phase change material failure temperature can be understood as the temperature at which the phase change material in the phase change thermal storage module 100 is in a failure state;

[0231] Exemplarily, the failure temperature of the phase change material is expressed as T_failure, the first temperature coefficient is expressed as △T2, and the second temperature coefficient is expressed as △T1. Then the first preset control temperature can be expressed as T_failure-△T2; the second preset control temperature can be expressed as T_failure-△T1, wherein the first temperature coefficient is smaller than the second temperature coefficient.

[0232] Specifically, the first temperature coefficient and the second temperature coefficient can be customized based on the actual application environment. The first temperature coefficient is the coefficient for entering the high temperature protection mode at the temperature set for turning on the high temperature protection mode, and the second temperature coefficient is the coefficient for exiting the high temperature protection mode at the temperature set for exiting the high temperature protection mode.

[0233] Furthermore, if the target sensing temperature is greater than or equal to the first preset control temperature, the control unit executes the high temperature protection mode for the phase change thermal storage module; if the target sensing temperature is less than the second preset control temperature, the control unit exits the high temperature protection mode for the phase change thermal storage module;

[0234] In one or more embodiments of the present specification, when the phase change thermal storage module is in the charging mode, the module sensing temperature of the temperature monitoring point is monitored, and the target sensing temperature is determined from the module sensing temperature. If the target sensing temperature is greater than or equal to the first preset control temperature, the high temperature protection mode is executed for the phase change thermal storage module. If the target sensing temperature is less than the second preset control temperature, the phase change thermal storage module exits the high temperature protection mode, thereby achieving effective high temperature protection for the phase change thermal storage module in the HVAC system, avoiding the situation where the temperature of the phase change thermal storage module is too high, ensuring the normal operation of the system, and further ensuring the performance of the HVAC system.

[0235] In one or more embodiments, a phase change thermal storage module is provided. Figures 14 to 16 , is a phase change thermal storage module 100 provided in an embodiment of the present application, the phase change thermal storage module 100 is mainly used for storing heat, and is a device for heat exchange, the phase change thermal storage module 100 includes a shell 60, a heat exchange module 20, a phase change material 50 and at least one temperature sensing component 10. The temperature sensing component 10 is arranged at a temperature monitoring point in the phase change thermal storage module.

[0236] Optionally, the shell 60 is shaped like a cubic structure, and a accommodating cavity 6021 is formed inside the shell 60. The heat exchange module 20 and the phase change material 50 are both arranged in the accommodating cavity 6021, and the heat exchange module 20 is buried in the phase change material 50. It should be noted that the heat exchange module 20 includes a plurality of sub-heat exchangers 201, and there is a gap between two adjacent sub-heat exchangers 201, and the phase change material 50 can be filled in the gap, so that the heat exchange module 20 can be in full contact with the phase change material 50, so that the heat exchange module 20 can be thermally connected to the phase change material 50, that is, the heat exchange module 20 can exchange heat with the phase change material 50.

[0237] The temperature sensing component 10 can be inserted into the phase change material 50 to a preset depth, so that the temperature sensing component 10 can detect the temperature of the phase change material 50 at the preset depth. Therefore, by inserting the temperature sensing component 10 into the phase change material 50 to a preset depth, the temperature change of the phase change material 50 in a specified area inside the phase change thermal storage module 100 can be accurately monitored.

[0238] See also Fig.16 and Fig.17 In some embodiments, the temperature sensing component 10 may include a support plate 1 , a blind pipe 2 , and a temperature sensing detector 3 .

[0239] Optionally, the support plate 1 is a square plate, and the support plate 1 can be fixed to the heat exchange module 20 by threaded connection or welding, and the support plate 1 has an assembly hole 11 (see Figure 7 ).

[0240] The blind tube 2 is a hollow tube body, and one end of the blind tube 2 is an open end, and the other end of the blind tube 2 is a closed end. The blind tube 2 can be inserted into the assembly hole 11, so that the closed end of the blind tube 2 extends into the heat exchange module 20, and the open end of the blind tube 2 can be connected to the support plate 1, so that the blind tube 2 can be accurately installed at a specified position in the heat exchange module 20 through the support plate 1.

[0241] Combination Fig.18 and Fig.19 The inner wall surface of the blind pipe 2 can also be provided with a positioning structure 21, and the temperature detector 3 can include a temperature probe 31. The temperature probe 31 can be arranged inside the blind pipe 2, and the temperature probe 31 can cooperate with the positioning structure 21 to limit the depth of the temperature probe 31 extending into the blind pipe 2, or in other words, the depth of the temperature probe 31 extending into the heat exchange module 20 can be limited, so that the temperature probe 31 can be firmly installed at a specified position in the heat exchange module 20, so as to accurately monitor the temperature change of the phase change material in the specified area of ​​the heat exchange module 20.

[0242] See also Fig.19In some embodiments, the positioning structure 21 can include a positioning protrusion 211 disposed on the inner wall surface of the blind tube 2 , and the temperature sensing probe 31 can be snap-fitted or abutted against the positioning protrusion 211 .

[0243] Optionally, the inner wall surface of the blind tube 2 can protrude toward the side where the axis of the blind tube 2 is located to form a positioning protrusion 211. When installing the temperature sensing detector 3, the temperature sensing probe 31 is inserted into the tube body of the blind tube 2 from the tube mouth of the blind tube 2. As the temperature sensing probe 31 is gradually inserted, the temperature sensing probe 31 can be engaged or abutted with the positioning protrusion 211. The positioning protrusion 211 can prevent the temperature sensing probe 31 from continuing to extend into the blind tube 2, thereby fixing the temperature sensing probe 31 at a specified position in the blind tube 2. Since the blind tube 2 is fixedly installed on the heat exchange module 20, the temperature sensing probe 31 can be fixed at a specified position of the heat exchange module 20, so that the temperature sensing probe 31 can be used to detect the temperature of the phase change material in the specified area. By arranging the positioning protrusion 211 on the inner wall surface of the blind tube 2, the temperature sensing probe 31 can be conveniently positioned at the specified position.

[0244] Optionally, the positioning protrusion 211 is extended along the circumference of the blind tube 2, so that a circular protrusion is formed on the inner wall surface of the blind tube 2. When the temperature sensing probe 31 is set in the blind tube 2, the lower end of the temperature sensing probe 31 can be inserted into the circular protrusion and abut against the circular protrusion, thereby positioning the temperature sensing probe 31 at the position where the positioning protrusion 211 is set.

[0245] Optionally, the inner wall surface of the blind tube 2 can be provided with a plurality of positioning protrusions 211, and the plurality of positioning protrusions 211 can be arranged in sequence and spaced apart along the circumference of the blind tube 2, and a snap-in groove can be formed between two adjacent positioning protrusions 211. When the temperature sensing probe 31 is arranged in the blind tube 2, the temperature sensing probe 31 can be snap-fitted with the snap-in groove, thereby positioning the temperature sensing probe 31 at the position where the positioning protrusion 211 is provided.

[0246] See also Figures 18 to 20 In some embodiments, the temperature detector 3 can also include a sensor wire 32, a portion of the sensor wire 32 is inserted into the blind tube 2 and connected to the temperature probe 31, and an in-position indicator 321 is provided on the outer wall of the sensor wire 32. When the temperature probe 31 cooperates with the positioning structure 21, the in-position indicator 321 is located at the pipe mouth of the blind tube 2.

[0247] Specifically, the sensor line 32 usually includes a conductive wire, which can be connected to the temperature sensing probe 31 and is used to transmit the temperature signal detected by the temperature sensing probe 31. Part of the sensor line 32 will be inserted into the blind tube 2. At this time, the blind tube 2 can also play a role in regularizing the sensor line 32 to prevent the sensor line 32 from swinging.

[0248] Optionally, the outer wall surface of the sensor wire body 32 can be provided with an in-position indicator portion 321, which can be extended along the length direction of the sensor wire body 32, and the length of the sensor wire body 32 between the in-position indicator portion 321 and the temperature sensing probe 31 can be flexibly adjusted according to the distance between the pipe mouth of the blind pipe 2 and the positioning structure 21, so that when installing the temperature detector 3, the installation status of the temperature sensing probe 31 can be judged by observing the position of the in-position indicator portion 321.

[0249] Specifically, when installing the temperature detector 3, the temperature probe 31 can be inserted into the blind tube 2 first, and then the sensor wire 32 can be gradually extended into the blind tube 2 to drive the temperature probe 31 to go further into the blind tube 2 until the sensor wire 32 can no longer extend into the blind tube 2. At this time, it can be judged whether the temperature probe 31 is installed in place based on the positional relationship between the in-place indicator 321 and the blind tube 2.

[0250] To be more clear, if the in-place indicator 321 is located at the pipe mouth of the blind pipe 2 at this time, it means that the temperature sensing probe 31 has successfully cooperated with the positioning structure 21, and the temperature sensing probe 31 has been installed in place; if there is still a distance between the in-place indicator 321 and the pipe mouth of the blind pipe 2 at this time, it means that the temperature sensing probe 31 may be stuck somewhere in the blind pipe 2, but has not yet extended into the positioning structure 21, and the temperature sensing probe 31 is not installed in place; if the in-place indicator 321 has extended into the interior of the blind pipe 2 at this time, it means that the positioning structure 21 may be damaged and the temperature sensing probe 31 cannot be limited, and the temperature sensing probe 31 is not installed in place.

[0251] Therefore, by observing the positional relationship between the position indicator 321 and the pipe opening of the blind pipe 2, it is possible to quickly and accurately determine whether the temperature sensing probe 31 is installed in place.

[0252] Optionally, the in-position indicator 321 is a mark or feature, for example, the in-position indicator 321 may be a color mark, a protrusion, a groove or other forms of marks.

[0253] See also Fig.17 and Fig.18 In some embodiments, the temperature detector 3 may further include a connector 33, which is disposed at the pipe mouth of the blind tube 2. The sensor wire 32 is passed through the connector 33 and inserted into the blind tube 2. The connector 33 is used to lock or loosen the sensor wire 32.

[0254] Optionally, the connector 33 is installed at the mouth of the blind tube 2. When the temperature detector 3 is installed, the sensor wire 32 will pass through the connector 33 and be inserted into the blind tube 2 until the temperature probe 31 cooperates with the positioning structure 21. At this time, the connector 33 can be locked. When the connector 33 is locked, the sensor wire 32 can be fixed to prevent the sensor wire 32 from loosening or displacement in the blind tube 2, so that the temperature probe 31 can be stably fixed in the blind tube 2 and accurately monitor the temperature change of the phase change material. And when the temperature probe 31 needs to be maintained or replaced, the sensor wire 32 can be easily pulled out from the blind tube 2 by simply loosening the connector 33 without complicated disassembly operations.

[0255] See also Fig. 20 In some embodiments, the connector 33 may include a base 331 and a fastening head 332. The base 331 is connected to the pipe mouth of the blind pipe 2. The fastening head 332 is threadedly matched with the base 331. The sensor line 32 can be sequentially passed through the fastening head 332 and the base 331. The fastening head 332 can be rotated relative to the base 331 to lock or loosen the sensor line 32. The sensor line 32 can be easily locked or loosened.

[0256] Specifically, the base 331 can adopt a size and shape that matches the blind pipe 2 so that the two can be firmly connected together, and the base 331 can also be connected to the support plate 1, so that the blind pipe 2, the base 331 and the support plate 1 can be connected together, and the base 331 can be provided with a first through hole 3310, and the first through hole 3310 can be connected to the blind pipe 2.

[0257] The fastening head 332 is provided with a second through hole 3320, which is coaxially arranged with the first through hole 3310 and connected with each other, so that the sensor line 32 can be sequentially passed through the second through hole 3320 and the first through hole 3310, and inserted into the blind tube 2.

[0258] By rotating the fastening head 332 relative to the base 331, a threaded feed or withdrawal action can be generated between the fastening head 332 and the base 331, and the fastening head 332 can lock or loosen the sensor line 32. To be more specific, when the fastening head 332 is tightened, the fastening head 332 will approach the base 331, and the fastening head 332 and the base 331 will generate sufficient friction force after cooperation, thereby firmly locking the sensor line 32 in the blind tube 2. Conversely, when the sensor line 32 needs to be loosened, the fastening head 332 only needs to be rotated in the opposite direction.

[0259] Optionally, the temperature sensing component 10 can also include heat transfer oil, which is a special lubricating oil used at high temperatures. The heat transfer oil can be arranged inside the blind pipe 2, and the heat transfer oil can immerse the temperature sensing probe 31. By filling the blind pipe 2 with heat transfer oil, the air isolation layer between the temperature sensing probe 31 and the phase change material can be eliminated, thereby improving the heat transfer effect between the temperature sensing probe 31 and the phase change material, and accelerating the response speed of the temperature sensing probe 31 to temperature changes, thereby improving the measurement accuracy.

[0260] Combination Fig. 20 Optionally, the temperature sensing component 10 can further include a seal 4 , which can be disposed between the sensor wire 32 and the blind tube 2 to seal the gap between the sensor wire 32 and the blind tube 2 .

[0261] Specifically, the seal 4 is a component used to fill or seal the gap between two objects, usually made of rubber, plastic or other elastic materials. The seal 4 can increase the airtightness at the pipe mouth of the blind pipe 2, prevent the heat transfer oil inside the blind pipe 2 from evaporating into the external environment through the pipe mouth, and can improve the stability of the heat transfer oil inside the blind pipe 2, thereby increasing the measurement accuracy of the temperature sensing probe 31, and can also prevent external air, moisture or other impurities from entering the blind pipe 2, thereby protecting the temperature sensing probe 31 from damage.

[0262] The following will be combined Fig.21 , the high temperature protection device of the phase change thermal storage module provided in the embodiment of the present application is introduced in detail. It should be noted that, Fig.21 The high temperature protection device of the phase change thermal storage module shown is used to execute the method of one or more embodiments shown in the present application. For the convenience of explanation, only the parts related to the embodiments of the present application are shown. For specific technical details not disclosed, please refer to one or more embodiments shown in the present application.

[0263] See also Fig.21 , which shows a schematic diagram of the structure of the high temperature protection device of the phase change thermal storage module of the embodiment of the present application. The high temperature protection device 1 of the phase change thermal storage module can be realized as all or part of the device through software, hardware or a combination of both. The high temperature protection device 1 is applied to the HVAC system, including the heat pump external unit, the phase change thermal storage module, and the control unit.

[0264] The heat pump external unit includes a control unit;

[0265] A phase-change thermal storage module, wherein the phase-change thermal storage module comprises a charging inlet and a charging outlet, wherein the charging inlet is connected to a heat source water outlet of the heat pump external unit, and the charging outlet is connected to a heat source water inlet of the heat pump external unit, wherein the heat pump external unit and the phase-change thermal storage module respectively form a charging flow path through the heat source water outlet, the charging inlet, the charging outlet and the heat source water inlet, wherein at least one temperature monitoring point is arranged in the phase-change thermal storage module, and the phase-change thermal storage module comprises at least a charging mode and a high temperature protection mode;

[0266] According to some embodiments, the high temperature protection device 1 of the phase change thermal storage module includes a monitoring module 11 and a processing module 12, which are specifically used for:

[0267] A monitoring module, used for monitoring the module sensing temperature of the temperature monitoring point when the phase change thermal storage module is in a charging mode, and determining a target sensing temperature from the module sensing temperature;

[0268] a processing module, configured to execute the high temperature protection mode on the phase change thermal storage module if the target sensing temperature is greater than or equal to a first preset control temperature;

[0269] The processing module is used for exiting the high temperature protection mode of the phase change thermal storage module if the target sensing temperature is lower than a second preset control temperature;

[0270] The first preset control temperature is the difference between the failure temperature of the phase change material and the first temperature coefficient, the second preset control temperature is the difference between the failure temperature of the phase change material and the second temperature coefficient, and the first temperature coefficient is smaller than the second temperature coefficient.

[0271] It should be noted that the high temperature protection device provided in the above embodiment only uses the division of the above functional modules as an example when executing the high temperature protection method. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. In addition, the high temperature protection device provided in the above embodiment and the high temperature protection method embodiment belong to the same concept, and the implementation process thereof is detailed in the method embodiment, which will not be repeated here.

[0272] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0273] In the embodiment of the present application, when the phase change thermal storage module is in the charging mode, the module sensing temperature of the temperature monitoring point is monitored, and the target sensing temperature is determined from the module sensing temperature. If the target sensing temperature is greater than or equal to the first preset control temperature, the high temperature protection mode is executed for the phase change thermal storage module. If the target sensing temperature is less than the second preset control temperature, the phase change thermal storage module exits the high temperature protection mode, thereby achieving effective high temperature protection for the phase change thermal storage module in the HVAC system, avoiding the situation where the temperature of the phase change thermal storage module is too high, ensuring the normal operation of the system, and further ensuring the performance of the HVAC system.

[0274] The present application also provides a computer storage medium, which can store multiple instructions, and the instructions are suitable for being loaded and executed by a processor as described above. Figures 1 to 20 The high temperature protection method of the phase change thermal storage module in the embodiment shown in the figure can be specifically implemented by referring to Figures 1 to 20 The specific description of the illustrated embodiment will not be repeated here.

[0275] The present application also provides a computer program product, which stores at least one instruction, and the at least one instruction is loaded and executed by the processor as described above. Figures 1 to 20 The high temperature protection method of the phase change thermal storage module in the embodiment shown in the figure can be specifically implemented by referring to Figures 1 to 20 The specific description of the illustrated embodiment will not be repeated here.

[0276] Please refer to Fig. 22 , is a block diagram of a structure 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 1010, a memory 1020, an input device 1030, an output device 1040, and a bus 1050. The processor 1010, the memory 1020, the input device 1030, and the output device 1040 may be connected via a bus 1050.

[0277] The processor 1010 may include one or more processing cores. The processor 1010 uses various interfaces and lines to connect various parts of the entire electronic device, and executes various functions and processes data of the electronic device 100 by running or executing instructions, programs, code sets or instruction sets stored in the memory 1020, and calling data stored in the memory 1020. Optionally, the processor 1010 can be implemented in at least one hardware form of digital signal processing (DSP), field-programmable gate array (FPGA), and programmable logic array (PLA). The processor 1010 can integrate one or a combination of a central processing unit (CPU), a graphics processing unit (GPU), and a modem. Among them, the CPU mainly processes the operating system, user interface, and application programs; the GPU is responsible for rendering and drawing display content; and the modem is used to process wireless communications. It can be understood that the above-mentioned modem may not be integrated into the processor 1010, but may be implemented separately through a communication chip.

[0278] The memory 1020 may include a random access memory (RAM) or a read-only memory (ROM). Optionally, the memory 1020 includes a non-transitory computer-readable storage medium. The memory 1020 may be used to store instructions, programs, codes, code sets, or instruction sets.

[0279] The input device 1030 is used to receive input instructions or data, and the input device 1030 includes but is not limited to a keyboard, a mouse, a camera, a microphone or a touch device. The output device 1040 is used to output instructions or data, and the output device 1040 includes but is not limited to a display device and a speaker. In the embodiment of this specification, the input device 1030 can be a temperature sensor for obtaining the operating temperature of the electronic device. The output device 1040 can be a speaker for outputting audio signals.

[0280] In addition, those skilled in the art will appreciate that the structure of the electronic device shown in the above drawings does not constitute a limitation on the electronic device, and the electronic device may include more or fewer components than shown, or combine certain components, or arrange the components differently. For example, the electronic device also includes a radio frequency circuit, an input unit, a sensor, an audio circuit, a wireless fidelity (WIFI) module, a power supply, a Bluetooth module and other components, which will not be described in detail here.

[0281] In the embodiments of this specification, the execution subject of each step may be the electronic device described above. Optionally, the execution subject of each step is the operating system of the electronic device. The operating system may be an Android system, an IOS system, or other operating systems, which is not limited in the embodiments of this specification.

[0282] exist Fig. 22 In the electronic device, the processor 1010 can be used to call the program stored in the memory 1020 and execute it to implement the high temperature protection method of the phase change thermal storage module as described in the various method embodiments of this specification.

[0283] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing related hardware through a computer program, and the program can be stored in a computer-readable storage medium, and when the program is executed, it can include the processes of the embodiments of the above-mentioned methods. The storage medium can be a disk, an optical disk, a read-only storage memory, or a random access memory, etc.

[0284] The above disclosure is only the preferred embodiment of the present application, which certainly cannot be used to limit the scope of rights of the present application. Therefore, equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A HVAC system, characterized in that: The HVAC system includes: A heat pump outdoor unit, including a control unit; A phase-change thermal storage module, wherein the phase-change thermal storage module comprises a charging inlet and a charging outlet, wherein the charging inlet is connected to a heat source water outlet of the heat pump external unit, and the charging outlet is connected to a heat source water inlet of the heat pump external unit, wherein the heat pump external unit and the phase-change thermal storage module respectively form a charging flow path through the heat source water outlet, the charging inlet, the charging outlet and the heat source water inlet, wherein at least one temperature monitoring point is arranged in the phase-change thermal storage module, and the phase-change thermal storage module comprises at least a charging mode and a high temperature protection mode; The control unit is configured as follows: When the phase change thermal storage module is in a charging mode, monitoring the module sensing temperature at the temperature monitoring point, and determining a target sensing temperature from the module sensing temperature; If the target sensing temperature is greater than or equal to the first preset control temperature, the high temperature protection mode is executed on the phase change thermal storage module; If the target sensing temperature is lower than the second preset control temperature, the phase change thermal storage module exits the high temperature protection mode; The first preset control temperature is the difference between the failure temperature of the phase change material and the first temperature coefficient, the second preset control temperature is the difference between the failure temperature of the phase change material and the second temperature coefficient, and the first temperature coefficient is smaller than the second temperature coefficient.

2. The HVAC system according to claim 1, characterized in that: The high temperature protection mode includes supplying water to cool the phase change thermal storage module and reducing the frequency of the heat pump external unit.

3. The HVAC system according to claim 2, characterized in that: The heat pump external unit includes a water pump and a compressor, and the control unit is configured as follows: The water pump is controlled based on the maximum water output to supply water and cool the phase change thermal storage module, and the compressor is frequency-reduced based on a preset cycle and a preset adjustment frequency.

4. The HVAC system according to claim 1, characterized in that: The control unit is configured as follows: If the target sensing temperature is greater than or equal to the third preset control temperature, monitoring the duration of the state in the target temperature state; If the state lasts longer than the first preset time, the shutdown protection mode is executed; The target temperature state is a temperature state when the target sensing temperature is greater than or equal to a third preset control temperature, and the third preset control temperature is a difference between a failure temperature of the phase change material and a third temperature coefficient.

5. The HVAC system according to claim 4, characterized in that: The third temperature coefficient is greater than or equal to 3 and the third temperature coefficient is less than 6.

6. The method according to claim 4, characterized in that The HVAC system includes a water supply switch, which is connected to the heat source water outlet and the charging inlet respectively. The control unit is configured as follows: After executing the shutdown protection mode, the water supply switch is controlled to be in a closed state, and the charging flow path is in a flow path disconnected state in the closed state.

7. The method according to claim 6, characterized in that The control unit is configured as follows: monitoring the water supply shut-off duration and the target sensed temperature; If the water supply shutdown time is longer than the second preset time and the target sensing temperature is lower than the second preset control temperature, the shutdown protection mode is exited.

8. The method according to claim 6, characterized in that The control unit is configured as follows: A system restart instruction is detected to exit the shutdown protection mode.

9. The method according to claim 4, characterized in that The control unit is configured as follows: After the shutdown protection mode is executed, if the state lasts for a time longer than a third preset time, the system cooling mode is turned on; If the target sensing temperature is lower than the second preset control temperature, the system cooling mode is exited. 10 . The method according to claim 1 , wherein the first temperature coefficient is greater than or equal to 6 and the first temperature coefficient is less than 10, the second temperature coefficient is less than 15 and the second temperature coefficient is greater than 10.

11. The method according to claim 1, characterized in that: The phase-change thermal storage module comprises a first temperature distribution region and a second temperature distribution region set for the phase-change material, wherein the temperature of the first temperature distribution region is greater than the temperature of the second temperature distribution region; The first temperature distribution area is configured with at least one first temperature monitoring point, the second temperature distribution area is configured with at least one second temperature monitoring point, and the module sensing temperature includes a first module sensing temperature corresponding to the first temperature monitoring point and a second module sensing temperature corresponding to the second temperature monitoring point.

12. The method according to claim 11, characterized in that The first temperature distribution region and the second temperature distribution region are set based on the temperature gradient distribution in the charging flow path direction in the phase change thermal storage module.

13. The method according to claim 1, characterized in that The target sensing temperature is the maximum sensing temperature among the module sensing temperatures.

14. A high temperature protection method, characterized in that: Applied to HVAC system, including heat pump external unit, phase change heat storage module, and control unit. The heat pump external unit comprises a control unit; A phase-change thermal storage module, wherein the phase-change thermal storage module comprises a charging inlet and a charging outlet, wherein the charging inlet is connected to a heat source water outlet of the heat pump external unit, and the charging outlet is connected to a heat source water inlet of the heat pump external unit, wherein the heat pump external unit and the phase-change thermal storage module respectively form a charging flow path through the heat source water outlet, the charging inlet, the charging outlet and the heat source water inlet, wherein at least one temperature monitoring point is arranged in the phase-change thermal storage module, and the phase-change thermal storage module comprises at least a charging mode and a high temperature protection mode; The method comprises: When the phase change thermal storage module is in a charging mode, monitoring the module sensing temperature at the temperature monitoring point, and determining a target sensing temperature from the module sensing temperature; If the target sensing temperature is greater than or equal to the first preset control temperature, the high temperature protection mode is executed on the phase change thermal storage module; If the target sensing temperature is lower than the second preset control temperature, the phase change thermal storage module exits the high temperature protection mode; The first preset control temperature is the difference between the failure temperature of the phase change material and the first temperature coefficient, the second preset control temperature is the difference between the failure temperature of the phase change material and the second temperature coefficient, and the first temperature coefficient is smaller than the second temperature coefficient.

15. A phase change thermal storage module, characterized in that: include: A shell, wherein a heat exchange module and a phase change material are arranged in the shell, the heat exchange module is buried in the phase change material, and the heat exchange module is thermally connected to the phase change material; At least one temperature sensing component is inserted into the phase change material to a preset depth, wherein the temperature sensing component is arranged at a temperature monitoring point in the phase change thermal storage module.

16. The phase change thermal storage module according to claim 15, characterized in that: The temperature sensing component comprises: A support plate, disposed on the heat exchange module, and the support plate has an assembly hole; A blind tube, inserted into the assembly hole and used to extend into the phase change material, wherein the inner wall surface of the blind tube is provided with a positioning structure; The temperature sensing detector comprises a temperature sensing probe arranged inside the blind tube, wherein the temperature sensing probe cooperates with the positioning structure to limit a preset depth of the temperature sensing probe inserted into the phase change material.

17. The phase change thermal storage module according to claim 16, characterized in that: The positioning structure comprises a positioning protrusion arranged on the inner wall surface of the blind tube, and the temperature sensing probe is engaged with or abuts against the positioning protrusion.

18. The phase change thermal storage module according to claim 17, characterized in that: The positioning protrusions are arranged to extend in a circle along the circumference of the blind tube; or, The plurality of positioning protrusions are sequentially spaced apart along the circumference of the blind tube.

19. The phase change thermal storage module according to claim 17, characterized in that: The temperature detector also includes a sensor wire body, which is partially inserted into the blind tube and connected to the temperature sensing probe, and an outer wall surface of the sensor wire body is provided with an in-position indicator. When the temperature sensing probe cooperates with the positioning structure, the in-position indicator is located at the pipe mouth of the blind tube.

20. The phase change thermal storage module according to claim 17, characterized in that: The temperature sensing component also includes heat-conducting oil, which is arranged inside the blind pipe and immerses the temperature sensing probe.

21. A computer storage medium, characterized in that The computer storage medium stores a plurality of instructions, which are suitable for being loaded by a processor and executing the method steps of claim 13 .

22. An electronic device, characterized in that: include: A processor and a memory; wherein the memory stores a computer program, and the computer program is suitable for being loaded by the processor and executing the method according to claim 13.

Images