Heating, ventilation and air conditioning device control method and heating, ventilation and air conditioning system

Abstract

Disclosed in the present application are a heating, ventilation and air conditioning device control method and apparatus, a storage medium, and a heating, ventilation and air conditioning device. The present application is applied to a heat source unit in a heating, ventilation and air conditioning system. The heating, ventilation and air conditioning system comprises a heat source unit and a phase change energy storage module, the phase change energy storage module being connected to the heat source unit. The phase change energy storage module contains a phase change material. The method comprises: determining a first temperature distribution region and a second temperature distribution region of the phase change material, the temperature of the first temperature distribution region being greater than the temperature of the second temperature distribution region; acquiring a first temperature corresponding to the first temperature distribution region, and acquiring a second temperature corresponding to the second temperature distribution region; and controlling the working state of the heat source unit on the basis of the first temperature, or controlling the working state of the heat source unit on the basis of the second temperature.

Description

Control methods for HVAC equipment and HVAC systems

[0001] This application claims priority to Chinese Patent Application No. 2024114487933, filed on October 16, 2024, entitled "Control Method and Heating and Ventilation System for Heating, Ventilation and Ventilation Equipment", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of heating, ventilation and air conditioning (HVAC) technology, specifically to a control method for HVAC equipment and an HVAC system. Background Technology

[0003] Phase change energy storage technology is an energy storage and utilization technology based on the phase change properties of phase change materials. These materials absorb or release large amounts of heat when transitioning between different states (such as solid, liquid, and gas), thus achieving energy storage and release. Therefore, introducing phase change energy storage technology into HVAC systems allows for the storage and utilization of heat generated by heat pumps within these systems.

[0004] However, in related technologies, phase change materials in HVAC systems cannot accurately control the operating status of HVAC equipment when storing and releasing energy.

[0005] Application content

[0006] This application provides a control method, device, storage medium, and HVAC equipment, which can improve the accuracy of controlling the working status of HVAC equipment.

[0007] In a first aspect, embodiments of this application provide a control method for heating, ventilation, and air conditioning (HVAC) equipment, applied to a heat source unit in an HVAC system. The HVAC system includes a heat source unit and a phase change energy storage module. The phase change energy storage module is connected to the heat source unit and includes a phase change material, comprising:

[0008] A first temperature distribution region and a second temperature distribution region are determined 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.

[0009] Obtain the first temperature corresponding to the first temperature distribution region, and obtain the second temperature corresponding to the second temperature distribution region; and

[0010] The operating state of the heat source unit is controlled according to the first temperature or the second temperature.

[0011] In one possible implementation, multiple first temperature monitoring points are set within the first temperature distribution area to obtain the first temperature corresponding to the first temperature distribution area, including:

[0012] Acquire multiple first temperature values ​​monitored from multiple first temperature monitoring points;

[0013] The highest temperature value among multiple first temperature values ​​is taken as the first temperature; and

[0014] Alternatively, the average temperature value of multiple first temperature values ​​can be used as the first temperature.

[0015] In one possible implementation, the operating states include an on state, and the operating state of the heat source unit is controlled according to a first temperature, including:

[0016] Determine whether the first temperature is lower than the preset first temperature; and

[0017] If so, the operating state of the control heat source unit is switched to the power-on state.

[0018] In one possible implementation, multiple second temperature monitoring points are set within the second temperature distribution area to obtain the second temperature corresponding to the second temperature distribution area, including:

[0019] Acquire multiple second temperature values ​​monitored from multiple second temperature monitoring points; and

[0020] The lowest temperature value among multiple second temperature values ​​is taken as the second temperature;

[0021] Alternatively, the average temperature value of multiple second temperature values ​​can be used as the second temperature.

[0022] In one possible implementation, the operating states include a shutdown state, and the operating state of the heat source unit is controlled according to a second temperature, including:

[0023] Determine whether the second temperature is greater than the preset second temperature; and

[0024] If so, the operating state of the control heat source unit is switched to the off state.

[0025] In one possible implementation, the first temperature distribution region and the second temperature distribution region are set based on the temperature gradient distribution in the direction of the energy flow path within the phase change energy storage module.

[0026] In one possible implementation, determining the first temperature distribution region and the second temperature distribution region of the phase change material includes:

[0027] The phase change material is divided into multiple temperature distribution regions according to the flow direction of the heat medium;

[0028] The region with the highest temperature among multiple temperature distribution regions is designated as the first temperature distribution region; and

[0029] The region with the lowest temperature among multiple temperature distribution regions is designated as the second temperature distribution region.

[0030] In one possible implementation, at least one third temperature monitoring point is set within the first temperature distribution area, and the method further includes:

[0031] Obtain the first correspondence between the third temperature value monitored by the third temperature monitoring point and the heat release degree of the phase change energy storage module;

[0032] The operating state of the heat source unit is controlled according to the first temperature, including:

[0033] Determine the energy change state of the phase change energy storage module, including the exothermic state;

[0034] If the energy change state of the phase change energy storage module is exothermic, then the target third temperature value monitored by the third temperature monitoring point is obtained, and the target third temperature value is used as the first temperature.

[0035] The target heat release level of the phase change energy storage module is determined based on the target third temperature value and the first correspondence; and

[0036] If the target heat release degree is greater than the preset heat release degree, the working state of the heat source unit is switched to the power-on state.

[0037] In one possible implementation, when the number of third temperature monitoring points is greater than or equal to two, the third temperature monitoring points are set at preset intervals in the direction of flow of the heat medium.

[0038] In one possible implementation, at least one fourth temperature monitoring point is set within the second temperature distribution area, and the method further includes:

[0039] Obtain the second correspondence between the fourth temperature value monitored by the fourth temperature monitoring point and the heat storage degree of the phase change energy storage module;

[0040] The operating status of the heat source unit is controlled according to the second temperature, including:

[0041] Determine the energy change state of the phase change energy storage module, including the heat storage state;

[0042] If the energy change state of the phase change energy storage module is the heat storage state, then the target fourth temperature value monitored by the fourth temperature monitoring point is obtained, and the target fourth temperature value is used as the second temperature.

[0043] The target heat storage capacity of the phase change energy storage module is determined based on the target fourth temperature value and the second corresponding relationship; and

[0044] If the target heat storage level is greater than the preset heat storage level, the operating state of the heat source unit will be switched to the shutdown state.

[0045] In one possible implementation, controlling the operating state of the heat source unit based on a first temperature, or based on a second temperature, includes:

[0046] The compressor frequency of the heat source unit is determined based on the first temperature, or the compressor frequency of the heat source unit is determined based on the second temperature.

[0047] In one possible implementation, determining the compressor frequency of the heat source unit based on a first temperature, or based on a second temperature, includes:

[0048] The target condensation temperature of the heat source unit is determined based on a first temperature, or based on a second temperature; and

[0049] The compressor frequency of the heat source unit is determined based on the target condensation temperature.

[0050] In one possible implementation, determining the target condensation temperature of the heat source unit based on a first temperature, or based on a second temperature, includes:

[0051] The virtual condensation temperature of the heat source unit is determined based on a first temperature, or the virtual condensation temperature of the heat source unit is determined based on a second temperature; and

[0052] The target condensation temperature of the heat source unit is determined based on the virtual condensation temperature.

[0053] In one possible implementation, determining the virtual condensation temperature of the heat source unit based on a first temperature includes:

[0054] When the target temperature of the phase change energy storage module is not less than the phase change temperature of the phase change material, and when the heating medium temperature output by the heat source unit is less than the phase change temperature when the HVAC equipment is started, the first temperature is taken as the virtual condensation temperature.

[0055] or,

[0056] When the HVAC equipment is set to rapid heating mode, the first temperature is used as the virtual condensing temperature.

[0057] In one possible implementation, determining the virtual condensation temperature of the heat source unit based on the second temperature includes:

[0058] If the target temperature of the phase change energy storage module is not less than the phase change temperature, and both the heating medium temperature and the second temperature reach the phase change temperature, then the second temperature will be used as the virtual condensation temperature.

[0059] or,

[0060] When the HVAC equipment is set to energy-saving mode, the second temperature is used as the virtual condensing temperature.

[0061] In one possible implementation, determining the target condensation temperature of the heat source unit based on the virtual condensation temperature includes:

[0062] The formula for calculating the target condensing temperature based on the virtual condensing temperature is as follows:

[0063] T cs =T x +ΔT+K

[0064] Among them, T cs T is the target condensation temperature. x ΔT is the virtual condensation temperature, which is the difference between the input and output heating medium temperature of the heat source unit in the charging flow path of the phase change energy storage module. ΔT ranges from 5 to 10℃. K is a correction parameter, which ranges from 0 to 2℃.

[0065] In one possible implementation, determining the compressor frequency of the heat source unit based on the target condensing temperature includes:

[0066] When the target condensing temperature is greater than the current saturated condensing temperature of the heat source unit, the compressor frequency of the heat source unit is increased; and

[0067] When the target condensing temperature is lower than the current saturated condensing temperature, the compressor frequency of the control heat source unit is reduced.

[0068] In one possible implementation, controlling the operating state of the heat source unit based on a first temperature includes:

[0069] When the first temperature is greater than or equal to the first preset control temperature, the phase change module is activated in a high-temperature protection mode via the heat source unit; and

[0070] When the first temperature is lower than the second preset control temperature, the phase change energy storage module is deactivated from the high temperature protection mode by the heat source unit.

[0071] Wherein, 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 and the second temperature coefficient, and the first temperature coefficient is less than the second temperature coefficient.

[0072] In one possible implementation, a high-temperature protection mode is implemented for the phase change module via a heat source unit, including:

[0073] The heat source unit controls the water supply to cool the phase change energy storage module and controls the frequency reduction process.

[0074] In one possible implementation, the heat source unit includes a water pump and a compressor, controlling the heat source unit to supply water for cooling the phase change energy storage module, and controlling the heat source unit to perform frequency reduction processing, including:

[0075] The water pump is controlled based on the maximum water output to supply water and cool the phase change energy storage module, and the compressor is frequency reduced based on the preset cycle and preset adjustment frequency.

[0076] Secondly, embodiments of this application provide a phase change energy storage module, including:

[0077] The housing contains a heat exchange module and a phase change material. The heat exchange module is embedded within the phase change material and is thermally connected to it.

[0078] The temperature sensing component is inserted into the phase change material at a preset depth. The temperature sensing component is used to monitor the temperature at the temperature monitoring point set inside the phase change energy storage module.

[0079] In one possible implementation, the temperature sensing component includes:

[0080] A support plate is provided on the heat exchange module, and the support plate has mounting holes;

[0081] A blind tube, inserted into an assembly hole and used to extend into the phase change material, has a positioning structure on its inner wall surface; and

[0082] The temperature detector includes a temperature probe disposed inside the blind tube. The temperature probe cooperates with the positioning structure to limit the preset depth of insertion of the temperature probe into the phase change material.

[0083] In one possible implementation, the positioning structure includes a positioning protrusion disposed on the inner wall surface of the blind tube, and the temperature sensing probe engages or abuts with the positioning protrusion.

[0084] In one possible implementation, the positioning bump extends circumferentially around the blind tube in a ring; or,

[0085] Multiple positioning protrusions are arranged sequentially at intervals along the circumference of the blind tube.

[0086] In one possible implementation, the temperature detector also includes a sensor wire, which is inserted into the blind tube and connected to the temperature probe. The outer wall of the sensor wire is provided with a positioning indicator. When the temperature probe is engaged with the positioning structure, the positioning indicator is located at the opening of the blind tube.

[0087] In one possible implementation, the temperature sensing component also includes heat-conducting oil disposed inside the blind tube, and the heat-conducting oil immerses the temperature sensing probe.

[0088] Thirdly, embodiments of this application also provide a control device for HVAC equipment, applied to a heat source unit in an HVAC system. The HVAC system includes a heat source unit and a phase change energy storage module. The phase change energy storage module is connected to the heat source unit and includes a phase change material, comprising:

[0089] A processor; and a memory arranged to store computer-executable instructions, which, when executed, cause the processor to perform a control method for a heating, ventilation, and air conditioning (HVAC) device according to any one of claims 1 to 20;

[0090] The determining unit is configured to determine a first temperature distribution region and a second temperature distribution region of the phase change material, wherein the temperature of the first temperature distribution region is greater than the temperature of the second temperature distribution region.

[0091] The acquisition unit is configured to acquire a first temperature corresponding to a first temperature distribution region and acquire a second temperature corresponding to a second temperature distribution region; and

[0092] The control unit is configured to control the operating state of the heat source unit according to a first temperature or according to a second temperature.

[0093] Fourthly, embodiments of this application also provide a heating, ventilation, and air conditioning system, including:

[0094] A heat source unit, wherein the heat source unit includes a controller;

[0095] A phase change energy storage module, wherein the phase change energy storage module is connected to the heat source unit, and the phase change energy storage module includes a phase change material.

[0096] Wherein: The above controller is configured as follows:

[0097] A first temperature distribution region and a second temperature distribution region are determined for the aforementioned phase change material, wherein the temperature of the first temperature distribution region is greater than the temperature of the second temperature distribution region.

[0098] Obtain the first temperature corresponding to the first temperature distribution region and obtain the second temperature corresponding to the second temperature distribution region; and

[0099] The operating state of the heat source unit is controlled according to the first temperature or the second temperature.

[0100] Fifthly, embodiments of this application also provide a computer-readable storage medium having a computer program stored thereon, which, when run on a computer, causes the computer to execute the control method for HVAC equipment as provided in any embodiment of this application.

[0101] Sixthly, embodiments of this application also provide a heating, ventilation, and air conditioning (HVAC) device, including a processor and a memory, the memory having a computer program, and the processor being configured to execute a control method for the HVAC device as provided in any embodiment of this application by calling the computer program.

[0102] The technical solution provided in this application is applied to a heat source unit in a heating, ventilation, and air conditioning (HVAC) system. The HVAC system includes a heat source unit and a phase change energy storage module. The phase change energy storage module is connected to the heat source unit and contains a phase change material. By determining a first temperature distribution region and a second temperature distribution region of the phase change material, where the temperature of the first temperature distribution region is greater than the temperature of the second temperature distribution region, a first temperature corresponding to the first temperature distribution region is obtained, and a second temperature corresponding to the second temperature distribution region is obtained. The operating state of the heat source unit is controlled based on either the first or second temperature. This application, by deeply exploring the temperature distribution characteristics of the phase change material and accurately capturing whether the phase change material in the HVAC system is storing or releasing energy through the temperature conditions of the first and second temperature distribution regions, enables targeted control of the heat source unit's operating state based on the corresponding energy state. This achieves precise perception and intelligent control of the energy state of the HVAC system, thereby improving the accuracy of controlling the operating state of HVAC equipment. Attached Figure Description

[0103] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0104] Figure 1 is a schematic diagram of the structure of the HVAC system of the control method for HVAC equipment provided in the embodiment of this application.

[0105] Figure 2 is a schematic diagram of the first type of control method for HVAC equipment provided in the embodiments of this application.

[0106] Figure 3 is a structural diagram of a phase change energy storage module provided in an embodiment of this application.

[0107] Figure 4 shows the phase change characteristics of the phase change material based on the phase change energy storage module provided in Figure 3 when the fins are vertical.

[0108] Figure 5 shows the temperature change of the phase change material when the phase change energy storage module in Figure 4 is in the heat storage stage with the fins vertical.

[0109] Figure 6 shows the temperature change of the phase change material when the phase change energy storage module in Figure 4 is in the heat release stage with the fins vertical.

[0110] Figure 7 shows the phase change characteristics of the phase change material in the finned horizontal case based on the phase change energy storage module provided in Figure 3.

[0111] Figure 8 shows the temperature change of the phase change material when the phase change energy storage module in Figure 7 is in the heat storage stage with the fins horizontal.

[0112] Figure 9 shows the temperature change of the phase change material when the phase change energy storage module in Figure 7 is in the heat release stage with the fins horizontal.

[0113] Figure 10 is a schematic diagram showing the distribution of temperature monitoring points within a phase change energy storage module according to an embodiment of this application.

[0114] Figure 11 shows the distribution characteristics of the phase change material temperature in the phase change energy storage module under heat storage state, based on the temperature monitoring points provided in Figure 10.

[0115] Figure 12 shows the distribution characteristics of the phase change material temperature in the phase change energy storage module under exothermic conditions, based on the temperature monitoring points provided in Figure 10.

[0116] Figure 13 is a schematic diagram of a second type of control method for HVAC equipment provided in an embodiment of this application.

[0117] Figure 14 is a schematic diagram of the third process of the control method for HVAC equipment provided in the embodiments of this application.

[0118] Figure 15 is a schematic diagram of the fourth process of the control method for HVAC equipment provided in the embodiments of this application.

[0119] Figure 16 is a simplified structural diagram of the heat storage device provided in the embodiment of this application, which has a temperature sensing component inside.

[0120] Figure 17 is a simplified structural diagram of the heat storage device provided in the embodiment of this application, which has a heat exchange module inside.

[0121] Figure 18 is a schematic diagram of the heat exchange module from a first perspective provided in the embodiments of this application.

[0122] Figure 19 is a schematic diagram of the temperature sensing component provided in an embodiment of this application.

[0123] Figure 20 is a schematic diagram of the cross-sectional structure at point BB in Figure 4.

[0124] Figure 21 is an enlarged structural diagram of point C in Figure 5.

[0125] Figure 22 is an enlarged structural diagram of point D in Figure 6.

[0126] Figure 23 is a schematic diagram of the structure of the control device for the HVAC equipment provided in the embodiment of this application.

[0127] Figure 24 is a schematic diagram of the first structure of the HVAC equipment provided in the embodiment of this application.

[0128] Figure 25 is a schematic diagram of a second structure of the HVAC equipment provided in the embodiments of this application. Detailed Implementation

[0129] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0130] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0131] Phase change energy storage technology is an energy storage and utilization technology based on the phase change properties of phase change materials. These materials absorb or release large amounts of heat when transitioning between different states (such as solid, liquid, and gas), thus achieving energy storage and release. Therefore, introducing phase change energy storage technology into HVAC systems allows for the storage and utilization of heat generated by heat pumps within these systems.

[0132] However, in related technologies, phase change materials in HVAC systems cannot accurately control the operating status of HVAC equipment when storing and releasing energy.

[0133] To address the problem of inaccurate control of the operating status of HVAC equipment in the aforementioned HVAC systems, this application provides a control method for HVAC equipment. The execution subject of this control method can be the control device for HVAC equipment provided in this application, or an HVAC equipment that integrates the control device for HVAC equipment. The control device for HVAC equipment can be implemented in hardware or software.

[0134] Next, please refer to Figure 1. This application embodiment provides a heating, ventilation and air conditioning system, wherein the heating, ventilation and air conditioning system 800, heat source unit 821, phase change energy storage module 831, energy charging inlet 841, energy charging outlet 842, energy dissipation outlet 851, energy dissipation inlet 852, energy charging flow path 861, and energy dissipation flow path 862. The HVAC system 800 provided in this application includes a heat source unit 821 and a phase change energy storage module 831. The phase change energy storage module 831 is connected to the heat source unit 821. The phase change energy storage module 831 is provided with multiple charging flow paths 861 and multiple releasing flow paths 862. The heat source unit 821 can be connected to the charging flow path 861 through the charging inlet 841 and the charging outlet 842. The hot fluid in the heat source unit 821 can flow into the charging flow path 861. The charging flow path 861 can transfer heat to the phase change material in the phase change energy storage module 831. Cold water can absorb the heat of the phase change material after flowing into the releasing flow path 862 through the releasing inlet 852. After the cold water is heated into hot water, it can flow out through the releasing outlet 851 for users to use. The HVAC system 800 provided in this application can provide users with clean hot water without the need to set up a water tank to store hot water.

[0135] Specifically, in the HVAC system 800 provided in this embodiment, the heat source unit 821 includes a controller, wherein the controller is used for:

[0136] A first temperature distribution region and a second temperature distribution region are determined 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.

[0137] Obtain the first temperature corresponding to the first temperature distribution region, and obtain the second temperature corresponding to the second temperature distribution region;

[0138] The operating state of the heat source unit is controlled according to the first temperature or the second temperature.

[0139] Next, please refer to Figure 2, which is a schematic flowchart of the first method for controlling HVAC equipment provided in this application embodiment. The control method for HVAC equipment provided in this application embodiment is applied to a heat source unit in an HVAC system. The HVAC system includes a heat source unit and a phase change energy storage module. The phase change energy storage module is connected to the heat source unit and includes a phase change material. The specific flow of this method is as follows:

[0140] S110. Determine the first temperature distribution region and the second temperature distribution region of the phase change material, wherein the temperature of the first temperature distribution region is greater than the temperature of the second temperature distribution region.

[0141] It should be noted that the temperature distribution of the phase change material in this phase change energy storage module is non-uniform. Specifically, within the phase change energy storage module, a temperature gradient is formed along the energy flow path (i.e., the path of energy flow or transfer), and the temperature value corresponding to this gradient decreases along the energy flow path. Therefore, in this application, the phase change material is divided into multiple temperature distribution regions based on its temperature gradient (i.e., temperature change). That is, the first temperature distribution region and the second temperature distribution region are set based on the temperature gradient distribution along the energy flow path within the phase change energy storage module.

[0142] In one possible implementation, in this embodiment of the application, when determining the first temperature distribution region and the second temperature distribution region of the phase change material, the phase change material is divided into multiple temperature distribution regions according to the flow direction of the heat medium; the region with the highest temperature among the multiple temperature distribution regions is taken as the first temperature distribution region; and the region with the lowest temperature among the multiple temperature distribution regions is taken as the second temperature distribution region.

[0143] That is, the first temperature distribution region is the region with the highest temperature gradient in the phase change material, and the second temperature distribution region is the region with the lowest temperature in the phase change material.

[0144] To illustrate the presence of a temperature gradient in the phase change material provided in this application embodiment, please refer to Figures 3 to 6 below. This section describes the temperature distribution in the phase change material using a phase change energy storage module with vertical fins, as follows:

[0145] Please refer to Figure 3, which is a structural diagram of a phase change energy storage module provided in an embodiment of this application. The phase change energy storage module mainly consists of 1 to 5 components, where 1 is a heat exchanger, 2 is the 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 the encapsulation shell. T5 is set at 0.95h0 < h < h0 (starting from the end near the inlet of the heat release medium and ending at the end near the outlet of the heat release medium, where h0 is the height of the phase change material), and T5_2 is set at 0.05h0 < h < 0.15h0.

[0146] It should be noted that the first temperature distribution region in this application is based on a high-temperature region, and the second temperature distribution region is based on a low-temperature region. For example, the high-temperature region can be used as the first temperature distribution region, and the low-temperature region can be used as the second temperature distribution region. Alternatively, the high-temperature region can be further divided into multiple high-temperature sub-regions according to the temperature distribution, and the high-temperature sub-region with the highest temperature distribution can be used as the first temperature distribution region. The low-temperature region can be further divided into multiple low-temperature sub-regions according to the temperature distribution, and the low-temperature sub-region with the lowest temperature distribution can be used as the second temperature distribution region.

[0147] Please refer to Figure 4. Figure 4 shows the phase change characteristics of the phase change material based on the phase change energy storage module provided in Figure 3 with the fins vertical. This figure illustrates the phase change energy storage module in the heat storage stage and the heat release stage when the fins are vertical. Specifically:

[0148] (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 changes from solid to liquid first. As the heat storage process proceeds, the high-temperature zone moves along the fluid direction, and the phase change energy storage module remains 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 fluid in the latter half drops sharply, which ultimately makes it difficult for the phase change material in the latter half to undergo a complete phase change during the heat storage process. Therefore, it is defined as the low-temperature zone.

[0149] Please refer to Figure 5. Figure 5 shows the temperature change of the phase change material in the phase change energy storage module during the heat storage stage, with the fins vertical, based on the phase change energy storage module in Figure 4. It should be noted that the numbers to the left of the curves in Figure 5 are temperature point numbers. For example, if the number to the left of the curve is 1, then the curve corresponds to temperature point 1; if the number to the left of the curve is 2, then the curve corresponds to temperature point 2, and so on. These temperature points are the temperature monitoring points. Wherein:

[0150] ①The phase change phase of the phase change material accounts for about 80% of the total heat storage time during the heat storage process;

[0151] 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 region is the low temperature region; the temperature of the phase change material in the 0.15h0<h≤h0 segment is higher than the phase change temperature.

[0152] ③ When position T5_2 is at h>0.15h0, the phase change material temperature reaches the set value ahead of time, causing the heat storage to end prematurely and the heat storage capacity to decrease.

[0153] ④At position T5_2, h < 0.05h0, the temperature of the high-temperature medium at the end of the heat exchanger is low, and the temperature of the phase change material at 0 to 0.05h0 is lower than the phase change temperature for a long time, which leads to the risk of overcharging or even overheating of the phase change energy storage module.

[0154] ⑤T5_2 should be placed in a height range of 0.05~0.15h0.

[0155] (2) When the phase change energy storage module is in the heat release stage, the cryogenic fluid flows from bottom to top along the pipeline. The phase change material in the cryogenic zone changes from liquid to solid first. As the heat release process proceeds, the cryogenic zone moves along the fluid direction, and the phase change energy storage module remains in a solid-liquid two-phase state for a long time. However, because the cryogenic fluid absorbs the heat of the phase change material, the temperature of the fluid in the latter half rises sharply, ultimately causing the phase change material in the latter half to remain at a higher temperature during the heat release process, and thus it is defined as the high-temperature zone.

[0156] Please refer to Figure 6. Figure 6 shows the temperature change of the phase change material in the phase change energy storage module shown in Figure 4 when the fins are vertical and the module is in the heat release phase. It should be noted that the numbers to the left of the curves in Figure 6 are temperature point labels. For example, if the number to the left of the curve is 19, then the curve corresponds to temperature point 19; similarly, if the number to the left of the curve is 18, then the curve corresponds to temperature point 18, and so on. Wherein:

[0157] ①The phase change temperature accounts for more than 95% of the total heat release time during the heat release process;

[0158] 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 higher than the phase change temperature, and this region is the high temperature region; the temperature of the phase change material in the 0≤h≤0.95h0 segment is lower than the phase change temperature.

[0159] ③ When T5 is at h>h0, the air temperature is being monitored. Since air has low thermal conductivity, the phase change material temperature may exceed the limit. However, the T5 temperature is still within the protection range.

[0160] ④ The T5 position is at h < 0.95h0, which is too low, resulting in insufficient heat release and a large amount of residual heat.

[0161] ⑤T5 should be placed in a height range of 0.95h0~h0.

[0162] The definition and feedback of the high-temperature zone and the low-temperature zone will affect the judgment of the heat storage and heat release of the phase change energy storage module.

[0163] It should be noted that the "fluid" in "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 supplying hot water through the phase change energy storage module, the fluid can be water, such as municipal tap water.

[0164] Next, to illustrate the presence of a temperature gradient in the phase change material provided in the embodiments of this application, please refer to Figure 3, and Figures 7 to 9 below. This section describes the temperature distribution in the phase change material using a phase change energy storage module with horizontal fins, as follows:

[0165] Please refer to Figure 7, which shows the phase change characteristics of the phase change material in the phase change energy storage module with horizontal fins as provided in Figure 3. This figure illustrates the phase change energy storage module in the heat storage and heat release stages when the fins are horizontal. Specifically:

[0166] (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 changes from solid to liquid first. As the heat storage process proceeds, the high-temperature zone moves along the fluid direction, and the phase change energy storage module remains 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 fluid in the latter half drops sharply, which ultimately makes it difficult for the phase change material in the latter half to undergo a complete phase change during the heat storage process. Therefore, it is defined as the low-temperature zone.

[0167] Please refer to Figure 8. Figure 8 shows the temperature change of the phase change material in the phase change energy storage module shown in Figure 7 when the fins are horizontal and the module is in the heat storage stage. It should be noted that the numbers to the left of the curves in Figure 8 are sensor number markers. For example, if the number to the left of the curve is 19, then the curve corresponds to sensor 19; similarly, if the number to the left of the curve is 18, then the curve corresponds to sensor 18, and so on.

[0168] ①The phase change phase of the phase change material accounts for about 80% of the total heat storage time during the heat storage process;

[0169] ② When the heat storage reaches 95% of the total, the temperature of the phase change material in the 0≤h≤0.15h0 range (temperature points 1-3) is lower than the phase change temperature, and this region is the low temperature region; the temperature of the phase change material in the 0.9h0<h≤h0 range is higher than the phase change temperature.

[0170] ③ When position T5_2 is at h>0.15h0, the material reaches the set temperature ahead of time, causing the heat storage to end prematurely and reducing the amount of heat stored.

[0171] (2) When the phase change energy storage module is in the heat release stage, the cryogenic fluid flows from left to right along the pipeline. The phase change material in the cryogenic zone changes from liquid to solid first. As the heat release process proceeds, the cryogenic zone moves along the fluid direction, and the phase change energy storage module remains in a solid-liquid two-phase state for a long time. However, because the cryogenic fluid absorbs the heat of the phase change material, the temperature of the fluid in the latter half rises sharply, ultimately causing the phase change material in the latter half to remain at a higher temperature during the heat release process, and thus it is defined as the high-temperature zone.

[0172] Please refer to Figure 9. Figure 9 shows the temperature change of the phase change material when the phase change energy storage module in Figure 7 is in the exothermic phase with the fins horizontal. It should be noted that the numbers to the left of the curves in Figure 9 are sensor number markers. For example, if the number to the left of the curve is 1, then the curve corresponds to sensor 1; if the number to the left of the curve is 2, then the curve corresponds to sensor 2, and so on.

[0173] ①The phase change temperature accounts for more than 95% of the total heat release time during the heat release process;

[0174] ② When the outlet water temperature is <40℃, the temperature of the phase change material in the 0.90h0 < h ≤ h0 segment (temperature point 1) is higher than the phase change temperature, and this region is a high temperature region; the temperature of the phase change material in the 0 ≤ h ≤ 0.90h0 segment is lower than the phase change temperature.

[0175] ③ The T5 position is at h < 0.90h0, which is too low, resulting in insufficient heat release and a large amount of residual heat.

[0176] ④T5 should be placed in a height range of 0.90h0~h0.

[0177] The definition and feedback of the high-temperature zone and the low-temperature zone will affect the judgment of the heat storage and heat release of the phase change energy storage module.

[0178] It should be noted that the "fluid" in "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 supplying hot water through the phase change energy storage module, the fluid can be water, such as municipal tap water.

[0179] Additionally, in one possible implementation, please refer to Figure 10, which is a schematic diagram of the distribution of temperature monitoring points within a phase change energy storage module according to an embodiment of this application. Figure 10 illustrates the setting of internal temperature monitoring points for the phase change energy storage module with the fins perpendicular.

[0180] ① The tube-fin heat exchanger is placed with the tubes parallel to the bottom of the inner tank and the fins perpendicular to the bottom;

[0181] ② The heat release and heat storage flow paths are arranged in parallel and alternately, and counter-current heat exchange is adopted;

[0182] 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;

[0183] ④ Due to the flow direction of the heat transfer medium in the phase change energy storage module, the module temperature is distributed longitudinally.

[0184] To monitor the temperature of the materials inside the phase change energy storage module, nine temperature monitoring points were set up from bottom to top along the same normal. Each temperature monitoring point corresponds to a temperature sensor, which 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 the nine temperature sensors are evenly distributed in the phase change energy storage module, detecting the temperature of the phase change material at different heights.

[0185] It should be noted that the nine temperature monitoring points set here are only for example. In actual situations, other numbers of temperature monitoring points can be set according to the actual scenario. No specific limit is set here.

[0186] Further, please refer to Figure 11, which is a distribution characteristic diagram of the phase change material temperature of the phase change energy storage module in the heat storage state, based on the temperature monitoring points provided in Figure 10. Figure 11 illustrates the temperature distribution of the phase change material at the nine temperature monitoring points set in Figure 10 when the phase change energy storage module is in the heat storage stage. It should be noted that the numbers to the left of the curves in Figure 11 are temperature point numbers. For example, if the number to the left of the curve is 1, then the curve corresponds to temperature point 1; similarly, if the number to the left of the curve is 2, then the curve corresponds to temperature point 2, and so on.

[0187] Referring to Figure 12, which shows the temperature distribution characteristics of the phase change material in the phase change energy storage module during the exothermic state, based on the temperature monitoring points provided in Figure 10. Figure 12 illustrates the temperature distribution of the phase change material at the nine temperature monitoring points set in Figure 10 when the phase change energy storage module is in the exothermic phase. It should be noted that the numbers to the left of the curves in Figure 12 are temperature point numbers. For example, if the number to the left of the curve is 9, then the curve corresponds to temperature point 9; similarly, if the number to the left of the curve is 8, then the curve corresponds to temperature point 8, and so on.

[0188] S120. Obtain the first temperature corresponding to the first temperature distribution area, and obtain the second temperature corresponding to the second temperature distribution area.

[0189] For example, multiple first temperature monitoring points can be set within the first temperature distribution area. When obtaining the first temperature corresponding to the first temperature distribution area, multiple first temperature values ​​monitored by the multiple first temperature monitoring points can be obtained, and the highest temperature value among the multiple first temperature values ​​can be taken as the first temperature; or, the average temperature value of the multiple first temperature values ​​can be taken as the first temperature.

[0190] It should be noted that phase change materials are materials that can absorb or release heat when the temperature changes. Their performance is greatly affected by the phase change temperature. When the temperature of the phase change material is particularly high, it will have a certain impact on the performance of the phase change energy storage module. Here, the highest temperature value detected in the first temperature distribution area is taken as the temperature corresponding to the first temperature distribution area. This makes it easier for relevant personnel to monitor the operation of the phase change energy storage module, thereby controlling the working status of the heat source unit more accurately.

[0191] Additionally, it should be noted that since the temperature distribution of the phase change material in the phase change energy storage module varies, the average temperature value among multiple first temperature values ​​is used as the temperature corresponding to the first temperature distribution area. This allows relevant personnel to grasp the temperature changes in the first temperature distribution area as a whole, thereby enabling more precise control of the working status of the heat source unit.

[0192] For example, multiple second temperature monitoring points can be set within the second temperature distribution area. When obtaining the second temperature corresponding to the second temperature distribution area, multiple second temperature values ​​monitored by the multiple second temperature monitoring points can be obtained. The lowest temperature value among the multiple second temperature values ​​can be taken as the second temperature; or, the average temperature value of the multiple second temperature values ​​can be taken as the second temperature.

[0193] It should be noted that when the temperature of the phase change material is particularly low, it will also have a certain impact on the performance of the phase change energy storage module. Here, the lowest temperature value detected in the second temperature distribution area is taken as the temperature corresponding to the second temperature distribution area. This makes it easier for relevant personnel to monitor the working status of the phase change energy storage module, thereby controlling the working status of the heat source unit more accurately.

[0194] Additionally, it should be noted that since the temperature distribution of the phase change material in the phase change energy storage module varies, the average temperature value among multiple second temperature values ​​is used as the temperature corresponding to the second temperature distribution area. This allows relevant personnel to grasp the temperature changes in the second temperature distribution area as a whole, thereby enabling more precise control of the working status of the heat source unit.

[0195] S130. Control the operating state of the heat source unit according to the first temperature, or control the operating state of the heat source unit according to the second temperature.

[0196] In this embodiment of the application, after obtaining the first temperature corresponding to the first temperature distribution area and the second temperature corresponding to the second temperature distribution area, the working state of the heat source unit is controlled according to the first temperature or the second temperature.

[0197] For example, the operating state of the heat source unit can be either on or off. The on or off state of the heat source unit can be controlled based on the first and second temperatures monitored in the phase change energy storage module.

[0198] In practice, this application is not limited by the execution order of the described steps. Without causing conflicts, some steps may be performed in other orders or simultaneously.

[0199] As can be seen from the above, the control method for HVAC equipment provided in this application is applied to the heat source unit of an HVAC system. The HVAC system includes a heat source unit and a phase change energy storage module. The phase change energy storage module is connected to the heat source unit and includes a phase change material. By determining a first temperature distribution region and a second temperature distribution region of the phase change material, where the temperature of the first temperature distribution region is greater than the temperature of the second temperature distribution region, a first temperature corresponding to the first temperature distribution region is obtained, and a second temperature corresponding to the second temperature distribution region is obtained. The operating state of the heat source unit is controlled based on either the first or the second temperature. This application, by deeply exploring the temperature distribution characteristics of the phase change material, accurately captures whether the phase change material in the HVAC system is storing or releasing energy by observing the temperature conditions of the first and second temperature distribution regions. Based on the corresponding energy state, the operating state of the heat source unit is controlled accordingly, enabling precise perception and intelligent control of the energy state of the HVAC system, thereby improving the accuracy of controlling the operating state of the HVAC equipment.

[0200] Based on the methods described in the preceding embodiments, the following examples will provide further detailed explanations.

[0201] Next, please refer to Figure 13, which is a second flowchart illustrating the control method for HVAC equipment provided in this embodiment. The control method for HVAC equipment provided in this embodiment is applied to a heat source unit in an HVAC system. The HVAC system includes a heat source unit and a phase change energy storage module. The phase change energy storage module is connected to the heat source unit and includes a phase change material. The specific flow of this method is as follows:

[0202] S210. Determine the first temperature distribution region and the second temperature distribution region of the phase change material, wherein the temperature of the first temperature distribution region is greater than the temperature of the second temperature distribution region.

[0203] Specifically, S210 is the same as S110, and will not be repeated here.

[0204] S220. Obtain the first temperature corresponding to the first temperature distribution area, and obtain the second temperature corresponding to the second temperature distribution area.

[0205] Specifically, S220 is the same as S120, and will not be repeated here.

[0206] S230. Determine whether the first temperature is lower than the preset first temperature. If so, proceed to step S240.

[0207] The preset first temperature can be set by the first temperature value of the first temperature distribution area when the phase change energy storage module needs to be powered in the actual scenario.

[0208] S240, switch the operating state of the control heat source unit to the power-on state.

[0209] In this application, when the first temperature is lower than the preset first temperature, it indicates that the phase change energy storage module needs to be powered. At this time, the working state of the control heat source unit is switched to the power-on state so that the heat source unit can power the phase change energy storage module.

[0210] In one possible implementation, at least one third temperature monitoring point can be set within the first temperature distribution area. By acquiring a first correspondence between the third temperature value monitored by the third temperature monitoring point and the heat release degree of the phase change energy storage module, when controlling the working state of the heat source unit according to the first temperature, the energy change state of the phase change energy storage module is determined. The energy change state includes the heat release state. If the energy change state of the phase change energy storage module is the heat release state, the target third temperature value monitored by the third temperature monitoring point is acquired and used as the first temperature. The target heat release degree of the phase change energy storage module is determined according to the target third temperature value and the first correspondence. If the target heat release degree is greater than the preset heat release degree, the working state of the heat source unit is controlled to switch to the power-on state.

[0211] Specifically, when determining the energy change state of the phase change energy storage module, the energy change state can be determined based on the rise or fall of the temperature value monitored by the third temperature monitoring point. For example, the temperature of the third temperature monitoring point can be collected every first preset time interval to determine the trend of multiple corresponding temperature values. If the trend is upward, it indicates that the current energy change state of the phase change energy storage module is a heat storage state; if the trend is downward, it indicates that the current energy change state of the phase change energy storage module is a heat release state.

[0212] The first preset duration can be set by those skilled in the art as needed. For example, the first preset duration can be 10 seconds, meaning the third temperature monitoring point collects a temperature value every 10 seconds. Alternatively, the first preset duration can be 15 seconds, meaning the third temperature monitoring point collects a temperature value every 15 seconds. Preferably, because phase change materials undergo a series of physical or chemical changes when their temperature changes, these changes require a certain amount of time to fully unfold. Therefore, the temperature monitoring point needs a time window to accurately capture the temperature change of the phase change material. This time window is not fixed and can be set or adjusted according to the characteristics of the phase change material and the sensitivity of the detection system. Those skilled in the art can determine the aforementioned time window for the phase change material currently in use and set the first preset duration accordingly. For example, if a 10-second time window is needed to detect temperature changes in the phase change material, then the first preset duration can be set to 10 seconds.

[0213] The first correspondence between the third temperature value and the degree of heat release of the phase change energy storage module can be obtained by those skilled in the art through monitoring the third temperature value during the heat release process of the phase change energy storage module. It is understood that the third temperature value will be different for different degrees of heat release.

[0214] The preset heat release level can be set by the minimum critical heat release level required to power the phase change energy storage module in the actual scenario.

[0215] When the number of third temperature monitoring points is greater than or equal to two, these third temperature monitoring points are set at preset intervals along the flow direction of the heat medium. It should be noted that setting multiple third temperature monitoring points here ensures the accuracy of temperature monitoring within the first temperature distribution area. For example, the average of the temperature values ​​monitored by multiple third temperature monitoring points can be used as the target third temperature value.

[0216] S250. Determine whether the second temperature is greater than the preset second temperature. If so, proceed to step S260.

[0217] The preset second temperature can be set by the second temperature value of the second temperature distribution area when the phase change energy storage module needs to be stopped from supplying energy in the actual scenario.

[0218] S260, switch the operating state of the control heat source unit to the off state.

[0219] In this application, when the second temperature is greater than the preset second temperature, it indicates that the phase change energy storage module needs to be stopped from supplying energy. At this time, the working state of the control heat source unit is switched to the shutdown state so that the heat source unit stops supplying energy to the phase change energy storage module.

[0220] In one possible implementation, at least one fourth temperature monitoring point can be set within the second temperature distribution area. By acquiring a second correspondence between the fourth temperature value monitored by the fourth temperature monitoring point and the heat storage degree of the phase change energy storage module, when controlling the working state of the heat source unit according to the second temperature, the energy change state of the phase change energy storage module is determined. The energy change state includes the heat storage state. If the energy change state of the phase change energy storage module is the heat storage state, the target fourth temperature value monitored by the fourth temperature monitoring point is acquired and used as the second temperature. The target heat storage degree of the phase change energy storage module is determined according to the target fourth temperature value and the second correspondence. If the target heat storage degree is greater than the preset heat storage degree, the working state of the heat source unit is controlled to switch to the shutdown state.

[0221] Specifically, when determining the energy change state of the phase change energy storage module, the energy change state can be determined based on the rise or fall of the temperature value monitored by the fourth temperature monitoring point. For example, the temperature of the fourth temperature monitoring point can be collected every second preset time interval to determine the trend of multiple corresponding temperature values. If the trend is upward, it indicates that the current energy change state of the phase change energy storage module is a heat storage state; if the trend is downward, it indicates that the current energy change state of the phase change energy storage module is a heat release state.

[0222] The second preset duration can be set by those skilled in the art as needed. For example, the second preset duration can be 10 seconds, meaning the fourth temperature monitoring point collects a temperature value every 10 seconds. Alternatively, the second preset duration can be 15 seconds, meaning the fourth temperature monitoring point collects a temperature value every 15 seconds. Preferably, because phase change materials undergo a series of physical or chemical changes when their temperature changes, these changes require a certain amount of time to fully unfold. Therefore, the temperature monitoring point needs a time window to accurately capture the temperature change of the phase change material. This time window is not fixed and can be set or adjusted according to the characteristics of the phase change material and the sensitivity of the detection system. Those skilled in the art can determine the aforementioned time window for the phase change material currently in use and set the second preset duration accordingly. For example, if a 10-second time window is needed to detect temperature changes in the phase change material, then the second preset duration can be set to 10 seconds.

[0223] The second correspondence between the fourth temperature value monitored at the fourth temperature monitoring point and the heat storage level of the phase change energy storage module can be obtained by those skilled in the art by monitoring the fourth temperature value of the phase change energy storage module during the heat storage process. It is understood that the fourth temperature value will be different under different heat storage levels.

[0224] The preset heat storage level can be set according to the maximum critical heat storage level required to stop the phase change energy storage module in the actual scenario.

[0225] When the number of fourth temperature monitoring points is greater than or equal to two, these fourth temperature monitoring points are set at preset intervals in the direction of heat medium flow. It should be noted that setting multiple fourth temperature monitoring points here ensures the accuracy of temperature monitoring in the first temperature distribution area. For example, the average of the temperature values ​​monitored by multiple fourth temperature monitoring points can be used as the target fourth temperature value.

[0226] As can be seen from the above, the control method for HVAC equipment proposed in this application determines a first temperature distribution region and a second temperature distribution region of the phase change material. The temperature of the first temperature distribution region is greater than the temperature of the second temperature distribution region. It obtains a first temperature corresponding to the first temperature distribution region and a second temperature corresponding to the second temperature distribution region, and determines whether the first temperature is less than a preset first temperature. If so, it controls the heat source unit to switch to the on state. It then determines whether the second temperature is greater than a preset second temperature. If so, it controls the heat source unit to switch to the off state. Thus, this application, by deeply exploring the temperature distribution characteristics of the phase change material and accurately capturing whether the phase change material in the HVAC system is storing or releasing energy through the temperature conditions of the first and second temperature distribution regions, can precisely control the working state of the heat source unit based on the corresponding energy state. This enables accurate perception and intelligent control of the energy state of the HVAC system, thereby improving the accuracy of controlling the working state of the HVAC equipment.

[0227] Next, please refer to Figure 14, which is a schematic diagram of the third flow of the control method for HVAC equipment provided in this application embodiment. The control method for HVAC equipment provided in this application embodiment is applied to a heat source unit in an HVAC system. The HVAC system includes a heat source unit and a phase change energy storage module. The phase change energy storage module is connected to the heat source unit and includes a phase change material. The specific flow of this method is as follows:

[0228] S310. Determine the first temperature distribution region and the second temperature distribution region of the phase change material, wherein the temperature of the first temperature distribution region is greater than the temperature of the second temperature distribution region.

[0229] Specifically, S310 is the same as S110, and will not be described again here.

[0230] S320. Obtain the first temperature corresponding to the first temperature distribution area, and obtain the second temperature corresponding to the second temperature distribution area.

[0231] Specifically, S320 is the same as S120, and will not be repeated here.

[0232] S330. Determine the compressor frequency of the heat source unit based on the first temperature, or determine the compressor frequency of the heat source unit based on the second temperature.

[0233] In one possible implementation, when determining the compressor frequency of the heat source unit based on a first temperature or a second temperature, the target condensing temperature of the heat source unit is determined based on the first temperature or the target condensing temperature of the heat source unit is determined based on the second temperature, and the compressor frequency of the heat source unit is determined based on the target condensing temperature.

[0234] The target condensing temperature refers to the ideal temperature that the condenser in the heat source unit must reach to allow the refrigerant to effectively complete its phase change (from gaseous to liquid) in the HVAC system, thereby releasing heat. The condensing temperature is a crucial parameter determining the performance of the heat pump in the heat source unit, directly affecting the refrigerant's heat exchange efficiency and the compressor's workload. In the heat source unit, the compressor's main function is to compress the refrigerant, causing it to release heat and undergo a phase change in the condenser. The compressor's operating frequency determines the refrigerant's compression intensity and circulation speed; therefore, by adjusting the compressor's frequency, the refrigerant flow rate and condenser temperature can be altered. When a temperature change in the phase change material is detected, the heat source unit's controller determines the required target condensing temperature and adjusts the compressor frequency accordingly, bringing the condenser to or near this target condensing temperature. This results in more precise heat generation and transfer within the heat source unit, improving overall energy efficiency, reducing unnecessary energy waste, and extending equipment lifespan.

[0235] In this embodiment, the target condensing temperature of the heat source unit can be determined based on the temperature of the phase change material detected at at least one temperature monitoring point, and the compressor frequency of the heat source unit can be controlled based on the target condensing temperature. In this way, the HVAC system can effectively improve operating efficiency and energy utilization while ensuring system stability and reliability. In this embodiment, the target condensing temperature can be determined using a first temperature or a second temperature.

[0236] In one example, when determining the target condensation temperature of the heat source unit based on the first temperature, the virtual condensation temperature of the heat source unit is determined based on the first temperature, and the target condensation temperature of the heat source unit is determined based on the virtual condensation temperature.

[0237] The formula for calculating the virtual condensation temperature is as follows:

[0238] T x =A×T1+B×T2

[0239] Among them, T xLet A be the virtual condensation temperature, B be the first weight, T1 be the first temperature, and T2 be the second temperature.

[0240] It should be noted that this virtual condensing temperature is a calculated temperature used to optimize the operation of HVAC systems. It reflects the overall thermal state of the phase change energy storage module by combining temperatures monitored at different locations, thus guiding the condensing control strategy of the HVAC system. The virtual condensing temperature is not a directly measured physical temperature, but rather a weighted average temperature calculated by the system based on temperature readings from multiple monitoring points and their weights. The first weight represents the relative importance of the first temperature; a larger weight indicates a greater influence of the first temperature on the virtual condensing temperature. The second weight represents the relative importance of the second temperature; a larger weight indicates a greater influence of the second temperature on the virtual condensing temperature. The sum of the first and second weights is 1, ensuring that both together determine the virtual condensing temperature.

[0241] It is understandable that, according to the calculation formula of the virtual condensation temperature, when the first weight A is 1 and the second weight B is 0, the target condensation temperature of the heat source unit can be determined by the first temperature.

[0242] Specifically, when the HVAC system is set to rapid heating mode, the first weight A is 1 and the second weight B is 0. At this time, the virtual condensing temperature of the heat source unit can be determined by the first temperature, thereby further calculating the target condensing temperature.

[0243] It should be noted that when the target condensing temperature exceeds the current saturated condensing temperature, the higher the target condensing temperature, the more frequently the compressor will operate, thereby enhancing the heating capacity of the heat source unit and enabling it to transfer heat to the phase change energy storage module more quickly. Therefore, in rapid heating mode, the controller's goal is to quickly charge the phase change energy storage module. In rapid heating mode, the controller sets the first weight of the first temperature to 1 and the second weight of the second temperature to 0, meaning it relies entirely on the first temperature to determine the virtual condensing temperature and the target condensing temperature.

[0244] Since the first temperature is the temperature of the phase change material in the high-temperature zone of the phase change energy storage module, relying entirely on the first temperature to determine the target condensation temperature will result in a higher temperature, thus accelerating the heating process and allowing the compressor to operate at a higher efficiency. This configuration ensures rapid energy charging in fast-heating mode, meeting the system's rapid heating requirements.

[0245] When determining the target condensing temperature of a heat source unit based on the virtual condensing temperature, the formula for calculating the target condensing temperature based on the virtual condensing temperature is as follows:

[0246] T cs =T x+ΔT+K

[0247] Among them, T cs T is the target condensation temperature. x ΔT is the virtual condensation temperature, which is the difference between the input and output heating medium temperature of the heat source unit in the charging flow path of the phase change energy storage module. ΔT ranges from 5 to 10℃. K is a correction parameter, which ranges from 0 to 2℃.

[0248] Specifically, T cs The target condensing temperature, i.e., the actual condensing temperature to be achieved, is used to control the operation of heat source units (such as heat pump units). The target condensing temperature affects the compressor's frequency and output efficiency. x The virtual condensation temperature, combining data and weights from different temperatures, reflects the overall temperature state of the phase change material within the phase change energy storage module. ΔT is the difference between the input and output temperatures of the heating medium in the heat source unit within the charging flow path (this can be expressed as the temperature difference when the heating medium enters and leaves the heat source unit, or the temperature difference when the heating medium enters and leaves the phase change energy storage module). This parameter reflects the heat exchange effect of the heating medium during the heating process. The ΔT value is generally controlled between 5 and 10°C to ensure effective heat exchange between the heat source unit and the phase change energy storage module. If the ΔT value is too small (e.g., less than 5°C), the heat exchange of the heating medium is insufficient, leading to reduced system efficiency; conversely, if the ΔT value is too large (e.g., exceeding 10°C), it may cause excessive load on the heat pump or other components, affecting the system's operational stability. K is a correction parameter used to adjust the target condensation temperature according to actual conditions. The K value is typically between 0 and 2°C, used to correct deviations caused by external environmental or system conditions, thereby ensuring a more accurate target condensation temperature.

[0249] The above-mentioned formula for calculating the target condensing temperature is derived by summing the virtual condensing temperature, the temperature difference ΔT in the charging flow path, and the system correction parameter K. This better reflects the system's real-time heat demand and actual operating conditions, ensuring that the compressor and the entire heat source unit operate under optimal conditions. This allows the HVAC system to flexibly adjust its operation according to actual conditions, avoiding overheating or condensation, and ensuring higher energy efficiency and operational stability.

[0250] In another example, when determining the target condensation temperature of the heat source unit based on the second temperature, the virtual condensation temperature of the heat source unit is determined based on the second temperature, and the target condensation temperature of the heat source unit is determined based on the virtual condensation temperature.

[0251] It is understandable that, according to the calculation formula of the virtual condensation temperature, when the first weight A is 0 and the second weight B is 1, the target condensation temperature of the heat source unit can be determined by the second temperature.

[0252] Specifically, when the HVAC system is set to energy-saving mode, the first weight A is 0 and the second weight B is 1. At this time, the virtual condensing temperature of the heat source unit can be determined by the second temperature, thereby further calculating the target condensing temperature.

[0253] It should be noted that when the HVAC system is in energy-saving mode, the controller aims to charge the phase change energy storage module with the lowest possible energy consumption. In energy-saving mode, the controller sets the first weight to 0 and the second weight to 1, meaning it relies entirely on the second temperature to determine the virtual condensing temperature and the target condensing temperature.

[0254] Since the second temperature is the temperature of the phase change material in the low-temperature zone of the phase change energy storage module, the target condensation temperature determined entirely by the second temperature will be relatively low, ensuring that the charging process is completed with minimal energy consumption. This configuration enables the HVAC system to operate with lower heating intensity, thereby achieving energy-saving effects and ensuring that the phase change energy storage module can be charged with minimal energy consumption while meeting demand.

[0255] When determining the target condensing temperature based on the virtual condensing temperature determined by the second temperature, the same calculation formula for the target condensing temperature can be used, which will not be repeated here.

[0256] In one possible implementation, when determining the virtual condensation temperature of the heat source unit based on the first temperature, if the target temperature of the phase change energy storage module is not less than the phase change temperature of the phase change material, and the temperature of the heating medium output by the heat source unit is less than the phase change temperature when the HVAC equipment is started, the first temperature is used as the virtual condensation temperature; or, if the setting mode of the HVAC equipment is the rapid heating mode, the first temperature is used as the virtual condensation temperature.

[0257] In one possible implementation, when determining the virtual condensation temperature of the heat source unit based on the second temperature, if the target temperature of the phase change energy storage module is not less than the phase change temperature, and both the heating medium temperature and the second temperature reach the phase change temperature, then the second temperature is used as the virtual condensation temperature; or, when the setting mode of the HVAC equipment is energy-saving mode, the second temperature is used as the virtual condensation temperature.

[0258] In one possible implementation, when determining the compressor frequency of the heat source unit based on the target condensing temperature, the compressor frequency of the heat source unit is controlled to increase when the target condensing temperature is greater than the current saturated condensing temperature of the heat source unit, and the compressor frequency of the heat source unit is controlled to decrease when the target condensing temperature is less than the current saturated condensing temperature.

[0259] Specifically, when the target condensing temperature exceeds the current saturated condensing temperature, the HVAC system needs to heat up more quickly to reach the required target temperature. Therefore, the controller increases the compressor frequency, accelerating the refrigerant circulation and thus enhancing the heating capacity of the heat source unit, enabling the heat storage module to reach the set target temperature in a shorter time.

[0260] When the target condensing temperature is lower than the current saturation condensing temperature, the HVAC system does not require excessive heat, so the controller reduces the compressor frequency. Reducing the compressor frequency decreases the compressor's workload, avoids overheating and energy waste, and thus improves the overall efficiency of the system.

[0261] The target condensing temperature is a reference temperature set for the HVAC system, representing the condensing temperature the system needs to achieve to control the operation of the heat source unit. The saturated condensing temperature is a physical temperature related to the condensing pressure within the heat source unit, representing the temperature at which the refrigerant can complete a gas-to-liquid phase change under the current pressure. It can be obtained by looking up the condensing pressure within the heat source unit.

[0262] It should be noted that the compressor frequency has an operating frequency range. Increasing the compressor frequency will not exceed its upper limit, and decreasing the compressor frequency will not exceed its lower limit. By dynamically adjusting the compressor frequency, it can be ensured that the HVAC system can operate with optimal efficiency and safety under different operating conditions.

[0263] As can be seen from the above, the control method for HVAC equipment proposed in this application determines a first temperature distribution region and a second temperature distribution region of the phase change material, wherein the temperature of the first temperature distribution region is greater than the temperature of the second temperature distribution region. It obtains a first temperature corresponding to the first temperature distribution region and a second temperature corresponding to the second temperature distribution region. Based on the first temperature, it determines the compressor frequency of the heat source unit, or based on the second temperature, it determines the compressor frequency of the heat source unit. This allows for flexible control of the working state of the heat source, avoids overheating or condensation, and ensures higher energy efficiency and operational stability.

[0264] Next, please refer to Figure 15, which is a schematic diagram of the fourth flow of the control method for HVAC equipment provided in this application embodiment. The control method for HVAC equipment provided in this application embodiment is applied to a heat source unit in an HVAC system. The HVAC system includes a heat source unit and a phase change energy storage module. The phase change energy storage module is connected to the heat source unit and includes a phase change material. The specific flow of this method is as follows:

[0265] S410. Determine the first temperature distribution region and the second temperature distribution region of the phase change material, wherein the temperature of the first temperature distribution region is greater than the temperature of the second temperature distribution region.

[0266] Specifically, S410 is the same as S110, and will not be described again here.

[0267] S420. Obtain the first temperature corresponding to the first temperature distribution region.

[0268] Specifically, S420 is the same as S120, and will not be repeated here.

[0269] S430: When the first temperature is greater than or equal to the first preset control temperature, the phase change module is subjected to a high-temperature protection mode through the heat source unit.

[0270] Wherein, 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 and the second temperature coefficient, and the first temperature coefficient is less than the second temperature coefficient.

[0271] For example, if the failure temperature of the phase change material is denoted as T_failure, the first temperature coefficient is denoted as △T2, and the second temperature coefficient is denoted as △T1, then the first preset control temperature can be denoted as T_failure-△T2; the second preset control temperature can be denoted as T_failure-△T1, wherein the first temperature coefficient is less than the second temperature coefficient.

[0272] 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 temperature judgment coefficient for entering the high temperature protection mode when the high temperature protection mode is turned on, and the second temperature coefficient is the temperature judgment coefficient for exiting the high temperature protection mode when the high temperature protection mode is turned off.

[0273] In this embodiment, when the phase change module is subjected to high-temperature protection mode by the heat source unit, the heat source unit can be controlled to supply water to cool the phase change energy storage module, and the heat source unit can be controlled to reduce the frequency.

[0274] The heat source unit includes a water pump and a compressor.

[0275] In this embodiment, the water pump can be controlled based on the maximum water output to supply water and cool the phase change energy storage module, and the compressor can be frequency reduced based on a preset cycle and a preset adjustment frequency.

[0276] The preset cycle and preset adjustment frequency can be set by those skilled in the art according to the actual situation.

[0277] That is, the water pump is controlled to increase the water supply to the charging flow path to cool down the phase change energy storage module. The temperature of the phase change energy storage module is reduced by supplying water and cooling it down through a preset cycle and a preset adjustment frequency. This reduces the operating frequency of the heat source unit, thereby reducing the working heat generated by the phase change energy storage module and thus allowing the phase change energy storage module to cool down rapidly.

[0278] S440: When the first temperature is lower than the second preset control temperature, the phase change energy storage module exits the high temperature protection mode through the heat source unit.

[0279] In this embodiment, when the first temperature is lower than the second preset control temperature, the heat source unit performs the processing corresponding to the high temperature protection mode described in step S430 for the phase change energy storage module to exit.

[0280] As can be seen from the above, the control method for HVAC equipment proposed in this application determines a first temperature distribution region and a second temperature distribution region for the phase change material. The temperature of the first temperature distribution region is greater than the temperature of the second temperature distribution region. A first temperature corresponding to the first temperature distribution region is obtained. When the first temperature is greater than or equal to a first preset control temperature, a high-temperature protection mode is executed on the phase change module through the heat source unit. When the first temperature is less than the second preset control temperature, the high-temperature protection mode is exited on the phase change energy storage module through the heat source unit. This achieves effective high-temperature protection for the phase change heat storage module in the HVAC system, avoids the phase change heat storage module from overheating, ensures normal system operation, and thus ensures the performance of the HVAC system.

[0281] Next, please refer to Figures 16 to 18, which show a phase change energy storage module 100 provided in an embodiment of this application. The phase change energy storage module 100 is mainly used for storing heat and for heat exchange. The phase change energy storage module 100 includes a housing 60, a heat exchange module 20, a phase change material 50, and at least one temperature sensing component 10.

[0282] Optionally, the shell 60 has a cubic shape and an internal cavity 6021 is formed inside the shell 60. The heat exchange module 20 and the phase change material 50 are both disposed in the cavity 6021. The heat exchange module 20 is embedded in the phase change material 50. It should be noted that the heat exchange module 20 includes multiple sub-heat exchangers 201. There is a gap between two adjacent sub-heat exchangers 201, and the phase change material 50 can fill the gap, so that the heat exchange module 20 can fully contact the phase change material 50. Thus, the heat exchange module 20 can conduct heat with the phase change material 50, so that the heat exchange module 20 can exchange heat with the phase change material 50.

[0283] The temperature sensing component 10 can be inserted into the phase change material 50 at a preset depth, enabling it to detect the temperature of the phase change material 50 at that depth. Therefore, by inserting the temperature sensing component 10 into the phase change material 50 at the preset depth, the temperature change of the phase change material 50 in a designated area inside the phase change energy storage module 100 can be accurately monitored. This temperature sensing component can be used to monitor the temperature at temperature monitoring points set within the phase change energy storage module.

[0284] Please refer to Figures 18 and 19. In some embodiments, the temperature sensing component 10 may include a support plate 1, a blind tube 2, and a temperature sensor 3.

[0285] Optionally, the support plate 1 is a square plate, which can be fixed to the heat exchange module 20 by means of threaded connection or welding, and the support plate 1 has assembly holes 11 (see Figure 22).

[0286] The blind tube 2 is a hollow tube with one open end and the other 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, while 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 in the designated position in the heat exchange module 20 through the support plate 1.

[0287] Referring to Figures 20 and 21, the inner wall of the blind tube 2 can also be provided with a positioning structure 21. The temperature sensor 3 can include a temperature probe 31. The temperature probe 31 can be disposed inside the blind tube 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 tube 2, or to limit the depth of the temperature probe 31 extending into the heat exchange module 20, so that the temperature probe 31 can be stably installed in the designated position inside the heat exchange module 20, thereby accurately monitoring the temperature change of the phase change material in the designated area of ​​the heat exchange module 20.

[0288] Please refer to Figure 21. In some embodiments, the positioning structure 21 may include a positioning protrusion 211 disposed on the inner wall surface of the blind tube 2, and the temperature sensing probe 31 may engage or abut with the positioning protrusion 211.

[0289] Optionally, the inner wall surface of the blind tube 2 can protrude to the side where the axis of the blind tube 2 is located to form a positioning protrusion 211. When installing the temperature sensor 3, the temperature sensor 31 is inserted into the tube body of the blind tube 2 from the tube opening. As the temperature sensor 31 gradually extends in, the temperature sensor 31 can engage or abut with the positioning protrusion 211. The positioning protrusion 211 can prevent the temperature sensor 31 from continuing to extend into the blind tube 2, thereby fixing the temperature sensor 31 in a designated position in the blind tube 2. Since the blind tube 2 is fixedly installed on the heat exchange module 20, the temperature sensor 31 can be fixed in a designated position in the heat exchange module 20, so that the temperature sensor 31 can be used to detect the temperature of the phase change material in a designated area. By setting the positioning protrusion 211 on the inner wall surface of the blind tube 2, the temperature sensor 31 can be conveniently positioned in a designated position.

[0290] Optionally, the positioning protrusion 211 extends around the circumference of the blind tube 2, forming an annular protrusion on the inner wall of the blind tube 2. When the temperature probe 31 is placed inside the blind tube 2, the lower end of the temperature probe 31 can be inserted into the annular protrusion and abut against it, thereby positioning the temperature probe 31 at the position where the positioning protrusion 211 is provided.

[0291] Optionally, the inner wall surface of the blind tube 2 may be provided with multiple positioning protrusions 211. The multiple positioning protrusions 211 may be arranged sequentially at intervals along the circumference of the blind tube 2. A snap-fit ​​groove may be formed between two adjacent positioning protrusions 211. When the temperature probe 31 is placed inside the blind tube 2, the temperature probe 31 may snap into the snap-fit ​​groove, thereby positioning the temperature probe 31 at the position provided with the positioning protrusions 211.

[0292] Please refer to Figures 20 to 22. In some embodiments, the temperature detector 3 may also include a sensor wire 32. The sensor wire 32 is partially inserted into the blind tube 2 and connected to the temperature probe 31. The outer wall of the sensor wire 32 is provided with a positioning indicator 321. When the temperature probe 31 is engaged with the positioning structure 21, the positioning indicator 321 is located at the opening of the blind tube 2.

[0293] Specifically, the sensor wire 32 typically includes wires that can be connected to the temperature probe 31 and are used to transmit the temperature signal detected by the temperature probe 31. Part of the sensor wire 32 is inserted into the blind tube 2. At this time, the blind tube 2 can also serve to straighten the sensor wire 32 and prevent the sensor wire 32 from swinging.

[0294] Optionally, the outer wall of the sensor line 32 can be provided with a positioning indicator 321. The positioning indicator 321 can extend along the length direction of the sensor line 32, and the length of the sensor line 32 between the positioning indicator 321 and the temperature probe 31 can be flexibly adjusted according to the distance between the opening of the blind tube 2 and the positioning structure 21, so that when installing the temperature detector 3, the installation status of the temperature probe 31 can be determined by observing the position of the positioning indicator 321.

[0295] Specifically, when installing the temperature sensor 3, the temperature sensor 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 sensor 31 to extend further into the blind tube 2 until the sensor wire 32 can no longer extend into the blind tube 2. At this time, the positional relationship between the positioning indicator 321 and the blind tube 2 can be used to determine whether the temperature sensor 31 is installed in place.

[0296] More specifically, if the positioning indicator 321 is located at the opening of the blind tube 2, it indicates that the temperature sensor 31 has successfully engaged with the positioning structure 21 and the temperature sensor 31 has been installed in place. If there is still a distance between the positioning indicator 321 and the opening of the blind tube 2, it indicates that the temperature sensor 31 may be stuck somewhere inside the blind tube 2, but has not yet extended into the positioning structure 21, and the temperature sensor 31 has not been installed in place. If the positioning indicator 321 has extended into the interior of the blind tube 2, it indicates that the positioning structure 21 may be damaged and unable to limit the temperature sensor 31, and the temperature sensor 31 has not been installed in place.

[0297] Therefore, by observing the positional relationship between the position indicator 321 and the opening of the blind tube 2, it is possible to quickly and accurately determine whether the temperature sensor 31 is installed in place.

[0298] Optionally, the positioning indicator 321 is a mark or feature, such as a color mark, a raised area, a groove, or other form of mark.

[0299] Optionally, the temperature sensing component 10 may also include thermally conductive oil, which is a special lubricant used at high temperatures. The thermally conductive oil can be placed inside the blind tube 2 and can immerse the temperature sensing probe 31. By filling the blind tube 2 with thermally conductive oil, the gas barrier 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, accelerating the response speed of the temperature sensing probe 31 to temperature changes, and improving the measurement accuracy.

[0300] In one embodiment, a control device for HVAC equipment is also provided. Please refer to Figure 23, which is a structural schematic diagram of the control device 500 for HVAC equipment provided in this embodiment. The control device 500 is applied to HVAC equipment and includes a determining unit 501, an acquiring unit 502, and a control unit 503, as follows:

[0301] The determining unit 501 is used to determine a first temperature distribution region and a second temperature distribution region of the phase change material, wherein the temperature of the first temperature distribution region is greater than the temperature of the second temperature distribution region.

[0302] The acquisition unit 502 is used to acquire the first temperature corresponding to the first temperature distribution area and the second temperature corresponding to the second temperature distribution area.

[0303] The control unit 503 is used to control the operating state of the heat source unit according to a first temperature or according to a second temperature.

[0304] In one possible implementation, multiple first temperature monitoring points are set within the first temperature distribution area, and the acquisition unit 502 can be used for:

[0305] Acquire multiple first temperature values ​​monitored from multiple first temperature monitoring points;

[0306] The highest temperature value among multiple first temperature values ​​is taken as the first temperature;

[0307] Alternatively, the average temperature value of multiple first temperature values ​​can be used as the first temperature.

[0308] In one possible implementation, the operating states include a power-on state, and the control unit 503 can be used for:

[0309] Determine whether the first temperature is lower than the preset first temperature;

[0310] If so, the operating state of the control heat source unit is switched to the power-on state.

[0311] In one possible implementation, multiple second temperature monitoring points are set within the second temperature distribution area, and the acquisition unit 502 can be used for:

[0312] Acquire multiple second temperature values ​​monitored from multiple second temperature monitoring points;

[0313] The lowest temperature value among multiple second temperature values ​​is taken as the second temperature;

[0314] Alternatively, the average temperature value of multiple second temperature values ​​can be used as the second temperature.

[0315] In one possible implementation, the operating states include a power-off state, and the control unit 503 can be used for:

[0316] Determine whether the second temperature is greater than the preset second temperature;

[0317] If so, the operating state of the control heat source unit is switched to the off state.

[0318] In one possible implementation, the first temperature distribution region and the second temperature distribution region are set based on the temperature gradient distribution in the direction of the energy flow path within the phase change energy storage module.

[0319] In one possible implementation, the determining unit 501 can be used to:

[0320] The phase change material is divided into multiple temperature distribution regions according to the flow direction of the heat medium;

[0321] The region with the highest temperature among multiple temperature distribution regions is designated as the first temperature distribution region.

[0322] The region with the lowest temperature among multiple temperature distribution regions is designated as the second temperature distribution region.

[0323] In one possible implementation, at least one third temperature monitoring point is set within the first temperature distribution area. The acquisition unit 502 can also be used for:

[0324] Obtain the first correspondence between the third temperature value monitored by the third temperature monitoring point and the heat release degree of the phase change energy storage module.

[0325] In one possible implementation, the control unit 503 can be used for:

[0326] Determine the energy change state of the phase change energy storage module, including the exothermic state;

[0327] If the energy change state of the phase change energy storage module is exothermic, then the target third temperature value monitored by the third temperature monitoring point is obtained, and the target third temperature value is used as the first temperature.

[0328] The target heat release level of the phase change energy storage module is determined based on the target third temperature value and the first correspondence.

[0329] If the target heat release degree is greater than the preset heat release degree, the working state of the heat source unit is switched to the power-on state.

[0330] When there are two or more third temperature monitoring points, the third temperature monitoring points are set at preset intervals in the direction of flow of the heat medium.

[0331] In one possible implementation, at least one fourth temperature monitoring point is set within the second temperature distribution area, and the acquisition unit 502 can also be used for:

[0332] Obtain the second correspondence between the fourth temperature value monitored at the fourth temperature monitoring point and the heat storage degree of the phase change energy storage module.

[0333] In one possible implementation, the control unit 503 can also be used for:

[0334] Determine the energy change state of the phase change energy storage module, including the heat storage state;

[0335] If the energy change state of the phase change energy storage module is the heat storage state, then the target fourth temperature value monitored by the fourth temperature monitoring point is obtained, and the target fourth temperature value is used as the second temperature.

[0336] The target heat storage capacity of the phase change energy storage module is determined based on the target fourth temperature value and the second corresponding relationship.

[0337] If the target heat storage level is greater than the preset heat storage level, the operating state of the heat source unit will be switched to the shutdown state.

[0338] In one possible implementation, the control unit 503 can be used to:

[0339] The compressor frequency of the heat source unit is determined based on the first temperature, or the compressor frequency of the heat source unit is determined based on the second temperature.

[0340] In one possible implementation, the control unit 503 can be used to:

[0341] The target condensation temperature of the heat source unit is determined based on the first temperature, or the target condensation temperature of the heat source unit is determined based on the second temperature.

[0342] The compressor frequency of the heat source unit is determined based on the target condensation temperature.

[0343] In one possible implementation, the control unit 503 can be used to:

[0344] The virtual condensation temperature of the heat source unit is determined based on the first temperature, or the virtual condensation temperature of the heat source unit is determined based on the second temperature.

[0345] The target condensation temperature of the heat source unit is determined based on the virtual condensation temperature.

[0346] In one possible implementation, the control unit 503 can be used to:

[0347] When the target temperature of the phase change energy storage module is not less than the phase change temperature of the phase change material, and when the heating medium temperature output by the heat source unit is less than the phase change temperature when the HVAC equipment is started, the first temperature is taken as the virtual condensation temperature.

[0348] or,

[0349] When the HVAC equipment is set to rapid heating mode, the first temperature is used as the virtual condensing temperature.

[0350] In one possible implementation, the control unit 503 can be used to:

[0351] The formula for calculating the target condensing temperature based on the virtual condensing temperature is as follows:

[0352] T cs =T x +ΔT+K

[0353] Among them, T cs T is the target condensation temperature. x ΔT is the virtual condensation temperature, which is the difference between the input and output heating medium temperature of the heat source unit in the charging flow path of the phase change energy storage module. ΔT ranges from 5 to 10℃. K is a correction parameter, which ranges from 0 to 2℃.

[0354] In one possible implementation, the control unit 503 can be used to:

[0355] When the target condensing temperature is greater than the current saturated condensing temperature of the heat source unit, the compressor frequency of the heat source unit is increased.

[0356] When the target condensing temperature is lower than the current saturated condensing temperature, the compressor frequency of the control heat source unit is reduced.

[0357] In one possible implementation, the control unit 503 can be used to:

[0358] When the first temperature is greater than or equal to the first preset control temperature, the phase change module is subjected to a high-temperature protection mode through the heat source unit.

[0359] When the first temperature is lower than the second preset control temperature, the phase change energy storage module is deactivated from the high temperature protection mode by the heat source unit.

[0360] Wherein, 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 and the second temperature coefficient, and the first temperature coefficient is less than the second temperature coefficient.

[0361] In one possible implementation, the control unit 503 can be used to:

[0362] The heat source unit controls the water supply to cool the phase change energy storage module and controls the frequency reduction process.

[0363] In one possible implementation, the heat source unit includes a water pump and a compressor, and the control unit 503 can be used for:

[0364] The water pump is controlled based on the maximum water output to supply water and cool the phase change energy storage module, and the compressor is frequency reduced based on the preset cycle and preset adjustment frequency.

[0365] It should be noted that the control device for HVAC equipment provided in this application embodiment and the control method for HVAC equipment in the above embodiment belong to the same concept. The control device for HVAC equipment can realize any of the methods provided in the control method embodiment for HVAC equipment. For details of its implementation process, please refer to the control method embodiment for HVAC equipment, which will not be repeated here.

[0366] Furthermore, to better implement the control method for HVAC equipment in the embodiments of this application, this application also provides an HVAC equipment based on the control method for HVAC equipment. Please refer to Figure 24, which is a schematic diagram of the first structure of the HVAC equipment provided in the embodiments of this application. The HVAC equipment 600 includes a processor 601 and a memory 602. The processor 601 and the memory 602 are electrically connected.

[0367] The processor 601 is the control center of the HVAC equipment 600. It connects to various parts of the entire HVAC equipment via various interfaces and lines. By running or calling computer programs stored in the memory 602, and by calling data stored in the memory 602, it executes various functions of the HVAC equipment and processes data, thereby performing overall monitoring of the HVAC equipment. The processor 601 can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor or any conventional processor.

[0368] The memory 602 can be used to store computer programs and data. The computer programs stored in the memory 602 contain instructions that can be executed in the processor. The computer programs can be composed of various functional modules. The processor 601 executes various functional applications and data processing by calling the computer programs stored in the memory 602. The memory 602 may mainly include a program storage area and a data storage area. The program storage area may store the operating system, application programs required for at least one function (such as sound playback function, image playback function, etc.), etc.; the data storage area may store data created according to the use of the HVAC equipment 600 (such as audio data, video data, etc.). In addition, the memory may include high-speed random access memory, and may also include non-volatile memory, such as hard disk, RAM, plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0369] In this embodiment, the processor 601 in the HVAC equipment 600 loads the instructions corresponding to the processes of one or more computer programs into the memory 602 according to the following steps, and the processor 601 runs the computer programs stored in the memory 602 to realize various functions:

[0370] A first temperature distribution region and a second temperature distribution region are determined 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.

[0371] Obtain the first temperature corresponding to the first temperature distribution region, and obtain the second temperature corresponding to the second temperature distribution region;

[0372] The operating state of the heat source unit is controlled according to the first temperature or the second temperature.

[0373] In one possible implementation, please refer to Figure 25, which is a second structural schematic diagram of the HVAC equipment provided in an embodiment of this application. The HVAC equipment 600 further includes a heat source unit 603 and a phase change energy storage module 604, the phase change energy storage module 604 being connected to the heat source unit 603.

[0374] For a detailed introduction to the heat source unit and phase change energy storage module, please refer to the relevant descriptions above, which will not be repeated here.

[0375] In this embodiment, the processor 601 in the HVAC equipment 600 loads the instructions corresponding to the processes of one or more computer programs into the memory 602 according to the following steps, and the processor 601 runs the computer programs stored in the memory 602 to realize various functions:

[0376] A first temperature distribution region and a second temperature distribution region are determined 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.

[0377] Obtain the first temperature corresponding to the first temperature distribution region, and obtain the second temperature corresponding to the second temperature distribution region;

[0378] The operating state of the heat source unit is controlled according to the first temperature or the second temperature.

[0379] In one possible implementation, multiple first temperature monitoring points are set within the first temperature distribution area. When the processor 601 executes the step of acquiring the first temperature corresponding to the first temperature distribution area, it can perform the following:

[0380] Acquire multiple first temperature values ​​monitored from multiple first temperature monitoring points;

[0381] The highest temperature value among multiple first temperature values ​​is taken as the first temperature;

[0382] Alternatively, the average temperature value of multiple first temperature values ​​can be used as the first temperature.

[0383] In one possible implementation, the operating states include a power-on state, and when the processor 601 executes the operating state of controlling the heat source unit according to the first temperature, it can perform the following:

[0384] Determine whether the first temperature is lower than the preset first temperature;

[0385] If so, the operating state of the control heat source unit is switched to the power-on state.

[0386] In one possible implementation, multiple second temperature monitoring points are set within the second temperature distribution area. When the processor 601 executes the step of acquiring the second temperature corresponding to the second temperature distribution area, it can perform the following:

[0387] Acquire multiple second temperature values ​​monitored from multiple second temperature monitoring points;

[0388] The lowest temperature value among multiple second temperature values ​​is taken as the second temperature;

[0389] Alternatively, the average temperature value of multiple second temperature values ​​can be used as the second temperature.

[0390] In one possible implementation, the operating states include a power-off state, and when the processor 601 executes the operating state of controlling the heat source unit according to the second temperature, it can perform the following:

[0391] Determine whether the second temperature is greater than the preset second temperature;

[0392] If so, the operating state of the control heat source unit is switched to the off state.

[0393] In one possible implementation, the first temperature distribution region and the second temperature distribution region are set based on the temperature gradient distribution in the direction of the energy flow path within the phase change energy storage module.

[0394] In one possible implementation, when processor 601 is performing the task of determining a first temperature distribution region and a second temperature distribution region of the phase change material, it may perform the following:

[0395] The phase change material is divided into multiple temperature distribution regions according to the flow direction of the heat medium;

[0396] The region with the highest temperature among multiple temperature distribution regions is designated as the first temperature distribution region.

[0397] The region with the lowest temperature among multiple temperature distribution regions is designated as the second temperature distribution region.

[0398] In one possible implementation, at least one third temperature monitoring point is set within the first temperature distribution area, and the processor 601 can also perform:

[0399] Obtain the first correspondence between the third temperature value monitored by the third temperature monitoring point and the heat release degree of the phase change energy storage module.

[0400] In one possible implementation, when the processor 601 is executing the operation state of the heat source unit based on the first temperature, it may perform the following:

[0401] Determine the energy change state of the phase change energy storage module, including the exothermic state;

[0402] If the energy change state of the phase change energy storage module is exothermic, then the target third temperature value monitored by the third temperature monitoring point is obtained, and the target third temperature value is used as the first temperature.

[0403] The target heat release level of the phase change energy storage module is determined based on the target third temperature value and the first correspondence.

[0404] If the target heat release degree is greater than the preset heat release degree, the working state of the heat source unit is switched to the power-on state.

[0405] In one possible implementation, when the number of third temperature monitoring points is greater than or equal to two, the third temperature monitoring points are set at preset intervals in the direction of flow of the heat medium.

[0406] In one possible implementation, at least one fourth temperature monitoring point is set within the second temperature distribution area, and the processor 601 can also perform:

[0407] Obtain the second correspondence between the fourth temperature value monitored at the fourth temperature monitoring point and the heat storage degree of the phase change energy storage module.

[0408] In one possible implementation, when the processor 601 is executing the operating state of the heat source unit according to the second temperature control, it may perform the following:

[0409] Determine the energy change state of the phase change energy storage module, including the heat storage state;

[0410] If the energy change state of the phase change energy storage module is the heat storage state, then the target fourth temperature value monitored by the fourth temperature monitoring point is obtained, and the target fourth temperature value is used as the second temperature.

[0411] The target heat storage capacity of the phase change energy storage module is determined based on the target fourth temperature value and the second corresponding relationship.

[0412] If the target heat storage level is greater than the preset heat storage level, the operating state of the heat source unit will be switched to the shutdown state.

[0413] In one possible implementation, when the processor 601 controls the operating state of the heat source unit according to a first temperature or according to a second temperature, it may perform the following:

[0414] The compressor frequency of the heat source unit is determined based on the first temperature, or the compressor frequency of the heat source unit is determined based on the second temperature.

[0415] In one possible implementation, when processor 601 determines the compressor frequency of the heat source unit based on a first temperature, or based on a second temperature, it may perform the following:

[0416] The target condensation temperature of the heat source unit is determined based on the first temperature, or the target condensation temperature of the heat source unit is determined based on the second temperature.

[0417] The compressor frequency of the heat source unit is determined based on the target condensation temperature.

[0418] In one possible implementation, when processor 601 determines the target condensation temperature of the heat source unit based on a first temperature, or based on a second temperature, it may perform the following:

[0419] The virtual condensation temperature of the heat source unit is determined based on the first temperature, or the virtual condensation temperature of the heat source unit is determined based on the second temperature.

[0420] The target condensation temperature of the heat source unit is determined based on the virtual condensation temperature.

[0421] In one possible implementation, when processor 601 determines the virtual condensation temperature of the heat source unit based on the first temperature, it may perform the following:

[0422] When the target temperature of the phase change energy storage module is not less than the phase change temperature of the phase change material, and when the heating medium temperature output by the heat source unit is less than the phase change temperature when the HVAC equipment is started, the first temperature is taken as the virtual condensation temperature.

[0423] or,

[0424] When the HVAC equipment is set to rapid heating mode, the first temperature is used as the virtual condensing temperature.

[0425] In one possible implementation, when processor 601 determines the virtual condensation temperature of the heat source unit based on the second temperature, it may perform the following:

[0426] If the target temperature of the phase change energy storage module is not less than the phase change temperature, and both the heating medium temperature and the second temperature reach the phase change temperature, then the second temperature will be used as the virtual condensation temperature.

[0427] or,

[0428] When the HVAC equipment is set to energy-saving mode, the second temperature is used as the virtual condensing temperature.

[0429] In one possible implementation, when processor 601 determines the target condensation temperature of the heat source unit based on the virtual condensation temperature, it may perform the following:

[0430] The formula for calculating the target condensing temperature based on the virtual condensing temperature is as follows:

[0431] T cs =T x +ΔT+K

[0432] Among them, T cs T is the target condensation temperature. x ΔT is the virtual condensation temperature, which is the difference between the input and output heating medium temperature of the heat source unit in the charging flow path of the phase change energy storage module. ΔT ranges from 5 to 10℃. K is a correction parameter, which ranges from 0 to 2℃.

[0433] In one possible implementation, when the processor 601 is executing the command to determine the compressor frequency of the heat source unit based on the target condensation temperature, it may perform the following:

[0434] When the target condensing temperature is greater than the current saturated condensing temperature of the heat source unit, the compressor frequency of the heat source unit is increased.

[0435] When the target condensing temperature is lower than the current saturated condensing temperature, the compressor frequency of the control heat source unit is reduced.

[0436] In one possible implementation, when the processor 601 is executing the operation state of the heat source unit based on the first temperature, it may perform the following:

[0437] When the first temperature is greater than or equal to the first preset control temperature, the phase change module is subjected to a high-temperature protection mode through the heat source unit.

[0438] When the first temperature is lower than the second preset control temperature, the phase change energy storage module is deactivated from the high temperature protection mode by the heat source unit.

[0439] Wherein, 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 and the second temperature coefficient, and the first temperature coefficient is less than the second temperature coefficient.

[0440] In one possible implementation, when the processor 601 executes the high-temperature protection mode for the phase change module via the heat source unit, it can perform the following:

[0441] The heat source unit controls the water supply to cool the phase change energy storage module and controls the frequency reduction process.

[0442] In one possible implementation, the heat source unit includes a water pump and a compressor. When the processor 601 controls the heat source unit to supply water for cooling the phase change energy storage module and controls the heat source unit to reduce its frequency, it can perform the following:

[0443] The water pump is controlled based on the maximum water output to supply water and cool the phase change energy storage module, and the compressor is frequency reduced based on the preset cycle and preset adjustment frequency.

[0444] This application also provides a computer-readable storage medium storing a computer program. When the computer program is run on a computer, the computer executes the control method for HVAC equipment described in any of the above embodiments.

[0445] It should be noted that those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, which may include, but is not limited to, read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0446] Furthermore, the terms "first," "second," and "third," etc., used in this application are used to distinguish different objects, not to describe a specific order. Additionally, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or modules is not limited to the listed steps or modules, but some embodiments may also include steps or modules not listed, or some embodiments may include other steps or modules inherent to these processes, methods, products, or devices.

[0447] The control method, apparatus, storage medium, and HVAC equipment provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the methods and core ideas of this application; at the same time, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A control method of a heating and ventilation apparatus, wherein, A heat source unit is applied in a heating, ventilation, and air conditioning (HVAC) system. The HVAC system includes the heat source unit and a phase change energy storage module. The phase change energy storage module is connected to the heat source unit and includes a phase change material. The control method for the HVAC equipment includes: A first temperature distribution region and a second temperature distribution region are determined 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. Obtain the first temperature corresponding to the first temperature distribution region, and obtain the second temperature corresponding to the second temperature distribution region; and The operating state of the heat source unit is controlled according to the first temperature, or according to the second temperature.

2. The control method of a heating and ventilation apparatus according to claim 1, wherein Multiple first temperature monitoring points are set within the first temperature distribution area. The step of obtaining the first temperature corresponding to the first temperature distribution area includes: Obtain multiple first temperature values ​​monitored from the plurality of first temperature monitoring points; and The highest temperature value among the plurality of first temperature values ​​shall be taken as the first temperature; Alternatively, the average temperature value of the plurality of first temperature values ​​can be used as the first temperature.

3. The control method of a heating and ventilation apparatus according to claim 2, wherein The operating state includes the power-on state, and the step of controlling the operating state of the heat source unit according to the first temperature includes: Determine whether the first temperature is lower than a preset first temperature; and If so, the operating state of the heat source unit is switched to the power-on state.

4. The control method of a heating and ventilation apparatus according to any one of claims 1 to 3, wherein Multiple second temperature monitoring points are set within the second temperature distribution area. The step of obtaining the second temperature corresponding to the second temperature distribution area includes: Acquire multiple second temperature values ​​monitored from the plurality of second temperature monitoring points; and The lowest temperature value among the plurality of second temperature values ​​shall be taken as the second temperature; Alternatively, the average temperature value of the plurality of second temperature values ​​can be used as the second temperature.

5. The control method of a heating and ventilation apparatus according to claim 4, wherein The operating state includes a power-off state, and controlling the operating state of the heat source unit according to the second temperature includes: Determine whether the second temperature is greater than a preset second temperature; and If so, the operating state of the heat source unit is switched to the shutdown state.

6. The control method of a heating and ventilation apparatus according to any one of claims 1 to 5, wherein, The first temperature distribution region and the second temperature distribution region are set based on the temperature gradient distribution in the energy flow path direction within the phase change energy storage module.

7. The control method of a heating apparatus according to claim 6, wherein Determining the first temperature distribution region and the second temperature distribution region of the phase change material includes: The phase change material is divided into multiple temperature distribution regions according to the flow direction of the heat medium; The region with the highest temperature among the plurality of temperature distribution regions is designated as the first temperature distribution region; and The region with the lowest temperature among the multiple temperature distribution regions is designated as the second temperature distribution region.

8. The control method of a heating and ventilation apparatus according to any one of claims 1 to 7, wherein, The method further includes setting at least one third temperature monitoring point within the first temperature distribution area. Obtain the first correspondence between the third temperature value monitored by the third temperature monitoring point and the heat release degree of the phase change energy storage module; The step of controlling the operating state of the heat source unit according to the first temperature includes: Determine the energy change state of the phase change energy storage module, including the exothermic state; If the energy change state of the phase change energy storage module is the exothermic state, then the target third temperature value monitored by the third temperature monitoring point is obtained, and the target third temperature value is used as the first temperature. The target heat release degree of the phase change energy storage module is determined based on the target third temperature value and the first correspondence; and If the target heat release degree is greater than the preset heat release degree, the working state of the heat source unit is switched to the power-on state.

9. The control method of a heating apparatus according to claim 8, wherein When the number of the third temperature monitoring points is greater than or equal to two, the third temperature monitoring points are set at preset intervals in the flow direction of the heat medium.

10. The control method of a heating and ventilation apparatus according to any one of claims 1 to 9, wherein, The method further includes setting at least one fourth temperature monitoring point within the second temperature distribution area. Obtain a second correspondence between the fourth temperature value monitored by the fourth temperature monitoring point and the heat storage degree of the phase change energy storage module; The step of controlling the operating state of the heat source unit according to the second temperature includes: Determine the energy change state of the phase change energy storage module, the energy change state including the heat storage state; If the energy change state of the phase change energy storage module is the heat storage state, then the target fourth temperature value monitored by the fourth temperature monitoring point is obtained, and the target fourth temperature value is used as the second temperature. The target heat storage level of the phase change energy storage module is determined based on the target fourth temperature value and the second correspondence; and If the target heat storage level is greater than the preset heat storage level, then the working state of the heat source unit is switched to the shutdown state.

11. The control method of a heating and ventilation apparatus according to any one of claims 1 to 10, wherein, The step of controlling the operating state of the heat source unit according to the first temperature, or according to the second temperature, includes: The compressor frequency of the heat source unit is determined based on the first temperature, or the compressor frequency of the heat source unit is determined based on the second temperature.

12. The control method of a heating and ventilation apparatus according to claim 11, wherein, Determining the compressor frequency of the heat source unit based on the first temperature, or determining the compressor frequency of the heat source unit based on the second temperature, includes: The target condensation temperature of the heat source unit is determined based on the first temperature, or the target condensation temperature of the heat source unit is determined based on the second temperature; and The compressor frequency of the heat source unit is determined based on the target condensation temperature.

13. The control method of a heating and ventilation apparatus according to claim 12, wherein, Determining the target condensation temperature of the heat source unit based on the first temperature, or determining the target condensation temperature of the heat source unit based on the second temperature, includes: The virtual condensation temperature of the heat source unit is determined based on the first temperature, or the virtual condensation temperature of the heat source unit is determined based on the second temperature; and The target condensation temperature of the heat source unit is determined based on the virtual condensation temperature.

14. The control method of a heating and ventilation apparatus according to claim 13, wherein, Determining the virtual condensation temperature of the heat source unit based on the first temperature includes: When the target temperature of the phase change energy storage module is not less than the phase change temperature of the phase change material, and when the heating and ventilation equipment is started, the temperature of the heating medium output by the heat source unit is less than the phase change temperature, the first temperature is taken as the virtual condensation temperature. or, When the setting mode of the HVAC equipment is the rapid heating mode, the first temperature is used as the virtual condensation temperature.

15. The control method of a heating and ventilation apparatus according to claim 13, wherein, Determining the virtual condensation temperature of the heat source unit based on the second temperature includes: If the target temperature of the phase change energy storage module is not less than the phase change temperature, and both the temperature of the heating medium and the second temperature reach the phase change temperature, then the second temperature is taken as the virtual condensation temperature. or, When the setting mode of the HVAC equipment is energy-saving mode, the second temperature is used as the virtual condensing temperature.

16. The control method of a heating and ventilation apparatus according to claim 13, wherein Determining the target condensation temperature of the heat source unit based on the virtual condensation temperature includes: The formula for calculating the target condensation temperature based on the virtual condensation temperature is as follows: T cs = T x + ΔT + K Among them, T cs T is the target condensation temperature. x The virtual condensation temperature is ΔT, which is the difference between the temperature of the heating medium input to the heat source unit and the temperature of the heating medium output in the energy flow path of the phase change energy storage module. ΔT is 5 to 10℃, and K is the correction parameter. K is 0 to 2℃.

17. The control method of a heating and ventilation apparatus according to claim 12, wherein, Determining the compressor frequency of the heat source unit based on the target condensation temperature includes: When the target condensation temperature is greater than the current saturated condensation temperature of the heat source unit, the compressor frequency of the heat source unit is controlled to increase; and When the target condensing temperature is lower than the current saturated condensing temperature, the compressor frequency of the heat source unit is reduced.

18. The control method of a heating and ventilation apparatus according to any one of claims 1 to 17, wherein, The step of controlling the operating state of the heat source unit according to the first temperature includes: When the first temperature is greater than or equal to the first preset control temperature, the phase change module is subjected to a high-temperature protection mode by the heat source unit; and When the first temperature is lower than the second preset control temperature, the phase change energy storage module exits the high temperature protection mode through the heat source unit. Wherein, 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 and the second temperature coefficient, and the first temperature coefficient is less than the second temperature coefficient.

19. The control method of a heating and ventilation apparatus according to claim 18, wherein The step of implementing a high-temperature protection mode for the phase change module through the heat source unit includes: The heat source unit is controlled to supply water to the phase change energy storage module for cooling, and the heat source unit is controlled to reduce the frequency.

20. The control method of a heating and ventilation apparatus according to claim 19, wherein The heat source unit includes a water pump and a compressor. Controlling the heat source unit to supply water for cooling the phase change energy storage module, and controlling the heat source unit to perform frequency reduction processing, includes: The water pump is controlled to supply water and cool the phase change energy storage module based on the maximum water output, and the compressor is frequency-reduced based on a preset cycle and a preset adjustment frequency.

21. A phase change energy storage module, wherein, include: A housing, wherein a heat exchange module and a phase change material are disposed within the housing, the heat exchange module is embedded within the phase change material, and the heat exchange module is thermally connected to the phase change material; as well as A temperature sensing component is inserted into the phase change material to a predetermined depth, wherein the temperature sensing component is used to monitor the temperature at a temperature monitoring point set within the phase change energy storage module.

22. The phase change energy storage module of claim 21, wherein, The temperature sensing component includes: A support plate is disposed on the heat exchange module, and the support plate has mounting holes; A blind tube, inserted into the mounting 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; and The temperature detector includes a temperature probe disposed inside the blind tube. The temperature probe cooperates with the positioning structure to limit the preset depth to which the temperature probe is inserted into the phase change material.

23. The phase change energy storage module of claim 22, wherein, The positioning structure includes a positioning protrusion disposed on the inner wall surface of the blind tube, and the temperature sensing probe is engaged or abutted against the positioning protrusion.

24. The phase change energy storage module of claim 23, wherein, The positioning protrusion extends circumferentially around the blind tube in a ring; or, Multiple positioning protrusions are arranged sequentially at intervals along the circumference of the blind tube.

25. The phase change energy storage module of claim 22, wherein, The temperature detector also includes a sensor wire, which is partially inserted into the blind tube and connected to the temperature probe. The outer wall of the sensor wire is provided with a positioning indicator. When the temperature probe is engaged with the positioning structure, the positioning indicator is located at the opening of the blind tube.

26. The phase change energy storage module of claim 22, wherein, The temperature sensing component also includes heat-conducting oil, which is disposed inside the blind tube and submerges the temperature sensing probe.

27. A control device for a heating, ventilation, and air conditioning system, wherein, A heat source unit is used in a heating, ventilation, and air conditioning (HVAC) system. The HVAC system includes the heat source unit and a phase change energy storage module. The phase change energy storage module is connected to the heat source unit and includes a phase change material. The control device for the HVAC equipment includes: A processor; and a memory arranged to store computer-executable instructions, which, when executed, cause the processor to perform a control method for a heating, ventilation, and air conditioning (HVAC) device according to any one of claims 1 to 20; The determining unit is configured to determine a first temperature distribution region and a second temperature distribution region of 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 acquisition unit is configured to acquire a first temperature corresponding to the first temperature distribution region and acquire a second temperature corresponding to the second temperature distribution region; and The control unit is configured to control the operating state of the heat source unit according to the first temperature, or to control the operating state of the heat source unit according to the second temperature.

28. A heating and ventilation system wherein, The HVAC system includes: Heat source unit, the heat source unit including controller; A phase change energy storage module, wherein the phase change energy storage module is connected to the heat source unit, and the phase change energy storage module includes a phase change material; Wherein: the controller is configured as follows: A first temperature distribution region and a second temperature distribution region are determined 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. Obtain the first temperature corresponding to the first temperature distribution region, and obtain the second temperature corresponding to the second temperature distribution region; and The operating state of the heat source unit is controlled according to the first temperature, or according to the second temperature.

29. A computer readable storage medium having stored thereon a computer program, wherein, When the computer program is run on a computer, it causes the computer to perform the control method for HVAC equipment as described in any one of claims 1 to 20.

30. A heating, ventilation, and air conditioning (HVAC) device comprising a processor and a memory, the memory storing a computer program, wherein, The processor is configured to execute the control method for HVAC equipment as described in any one of claims 1 to 20 by invoking the computer program.

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