Phase change wall system control method and device, phase change wall system and storage medium

Abstract

The invention discloses a control method and device of a phase change wall system, the phase change wall system and a storage medium, the phase change wall system comprises a unit heat pipe array, and the method comprises the steps that the environment temperature of the phase change wall system is obtained, data analysis is conducted according to the environment temperature, and a working mode is obtained; and working parameters of the unit heat pipe array are adjusted according to the working mode and the environment temperature. The room temperature adjusting efficiency can be improved, and the resource utilization rate of the phase change material is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of phase change walls, and in particular to a control method, device, phase change wall system and storage medium of a phase change wall system. Background Art

[0002] At present, the energy storage and temperature regulation wall system coupled with renewable energy realizes effective regulation of indoor temperature through the organic combination of phase change materials with solar energy and geothermal energy. The energy storage and temperature regulation wall system uses a solar collector to collect light energy and convert it into heat energy, exchanges heat with the ground through a soil heat exchange pipe, and then absorbs or releases heat through the solid-liquid phase change process of the phase change material to achieve the purpose of temperature control.

[0003] The room temperature is affected by various environmental factors and constantly changes. The energy storage and temperature regulation wall system relies on the phase change material to automatically adjust the indoor temperature as the room temperature changes. The phase change material undergoes a phase change as the room temperature changes and adjusts its own heat absorption or release during the phase change process, thereby regulating the room temperature to remain at a corresponding temperature. However, the efficiency of regulating the room temperature only through the phase change material itself is low, which leads to waste of resources of the phase change material. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. For this reason, the present invention provides a control method for a phase change wall system, which can improve the efficiency of room temperature regulation and the resource utilization rate of the phase change material.

[0005] The present invention also provides a control device for a phase change wall system.

[0006] The present invention also provides a phase change wall system.

[0007] The present invention also provides a computer-readable storage medium.

[0008] In a first aspect, an embodiment of the present invention provides a control method for a phase change wall system, the phase change wall system includes a unit heat pipe array, and the method includes:

[0009] Obtain the environmental temperature of the phase change wall system;

[0010] Perform data analysis based on the environmental temperature to obtain a working mode;

[0011] Adjust the operating parameters of the unit heat pipe array according to the operating mode and the ambient temperature. The control method of the phase change wall system according to the embodiment of the present invention has at least the following beneficial effects: obtaining the temperature of the environment where the phase change wall system is located to obtain the ambient temperature, performing data analysis based on the ambient temperature, and determining the operating mode that the phase change wall system needs to switch according to the result of the data analysis. After the determination is completed, the phase change wall system switches to the corresponding operating mode, and the internal controller of the phase change wall system adjusts the corresponding operating parameters of the unit heat pipe array according to the current operating mode and the ambient temperature of the system. By enabling the phase change wall system to switch the operating mode in real time according to the current ambient temperature and adjust the corresponding operating parameters of the unit heat pipe array to assist the phase change wall system in regulating the room temperature, the efficiency of the entire system in regulating the room temperature can be improved, and thus the resource utilization rate of the phase change material can be increased.

[0012] According to the control method of the phase change wall system according to other embodiments of the present invention, the operating modes include a heat dissipation mode, a heat supplement mode, and a fire mode. The obtaining of the operating mode by performing data analysis based on the ambient temperature includes:

[0013] In the case where the ambient temperature is greater than a preset first temperature, obtaining the heat dissipation mode;

[0014] In the case where the ambient temperature is less than a preset second temperature, obtaining the heat supplement mode;

[0015] In the case where the ambient temperature is greater than a preset third temperature, obtaining the fire mode.

[0016] According to the control method of the phase change wall system according to other embodiments of the present invention, the operating parameters include a heat conduction path and a heat power. The adjusting of the operating parameters of the unit heat pipe array according to the operating mode and the ambient temperature includes:

[0017] Switching the heat conduction path of the unit heat pipe array according to the operating mode;

[0018] Adjusting the heat power of the unit heat pipe array according to the ambient temperature.

[0019] According to the control method of the phase change wall system according to other embodiments of the present invention, the phase change wall system further includes a solenoid valve. The heat conduction path includes an external heat dissipation channel and an internal circulation channel. The external heat dissipation channel and the internal circulation channel are connected to the solenoid valve. The switching of the heat conduction path of the unit heat pipe array according to the operating mode includes:

[0020] In the case of switching to the heat dissipation mode, connecting the unit heat pipe array to the external heat dissipation channel;

[0021] When switching to the supplementary heating mode, connect the unit heat pipe array to the internal circulation channel;

[0022] When switching to the fire mode, close the solenoid valve.

[0023] According to another embodiment of the control method of the phase change wall system of the present invention, adjusting the heat power of the unit heat pipe array according to the ambient temperature includes:

[0024] Perform data analysis based on the ambient temperature to obtain the duty cycle of the solenoid valve;

[0025] Adjust the heat power according to the duty cycle.

[0026] In a second aspect, an embodiment of the present invention provides a control device for a phase change wall system. The phase change wall system includes a unit heat pipe array, and the device includes:

[0027] A temperature sensing unit for obtaining the ambient temperature of the phase change wall system;

[0028] A data analysis unit for performing data analysis based on the ambient temperature to obtain the working mode of the unit heat pipe array;

[0029] A temperature regulation unit for adjusting the working parameters of the unit heat pipe array according to the working mode and the ambient temperature.

[0030] In a third aspect, an embodiment of the present invention provides a phase change wall system. The wall structure of the phase change wall system includes:

[0031] An inner wall decorative layer, including a 12-mm-thick gypsum board with a thermal conductivity of 0.17 W / (m·K) and a fire protection grade of A1;

[0032] A phase change energy storage layer, including a 50-mm-thick composite phase change material. The composite phase change material includes paraffin or C20 alkane and sodium acetate trihydrate, with a phase change temperature between 24 and 28 °C and a latent heat value greater than or equal to 120 J / g, encapsulated in an aluminum honeycomb structure;

[0033] A fireproof and heat-insulating layer, including a 30-mm-thick expanded perlite-based composite material with a fire resistance limit greater than or equal to 2 h, a thermal conductivity of 0.048 W / (m·K), and containing a magnesium aluminum silicate flame retardant;

[0034] An outer wall protection layer for resisting environmental erosion and protecting the inner wall decorative layer, the phase change energy storage layer, and the fireproof and heat-insulating layer.

[0035] According to some other embodiments of the present invention, the phase change wall system further includes: a digital temperature sensor of the DS18B20 model, with an accuracy of 0.5 °C, which is arranged in the phase change energy storage layer, and is arranged on the inner surface and the outer surface of the phase change wall system for monitoring the ambient temperature of the phase change wall system.

[0036] According to some other embodiments of the present invention, the phase change wall system further includes:

[0037] A unit heat pipe array, including copper pipes with a diameter of 5 to 9 mm, filled with an Al2O3-water-based nanofluid with a thermal conductivity of 0.65 W / (m·K) inside, and is embedded in a grid pattern between the phase change energy storage layer and the fireproof and heat-insulating layer with a spacing of 50 mm, and the total heat conduction area is greater than or equal to 2.5 m 2 / m 2 。

[0038] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, which stores computer-executable instructions for causing a computer to execute the control method of the phase change wall system as described in the first aspect.

[0039] Other features and advantages of the present application will be described in the subsequent description, and some of them will become obvious from the description, or be understood by implementing the present application. The objectives and other advantages of the present application can be achieved and obtained through the structures specifically pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 is a schematic flowchart of a specific embodiment of the control method of the phase change wall system in an embodiment of the present invention;

[0041] Figure 2 is Figure 1 a schematic flowchart of a specific embodiment of step 102 in

[0042] Figure 3 is Figure 1 a schematic flowchart of a specific embodiment of step 103 in

[0043] Figure 4 is Figure 3 a schematic flowchart of a specific embodiment of step 301 in

[0044] Figure 5 is Figure 3 a schematic flowchart of a specific embodiment of step 302 in

[0045] Figure 6 is a schematic block diagram of a specific embodiment of the control device of the phase change wall system in an embodiment of the present invention;

[0046] Figure 7 It is a schematic diagram of the wall structure of a specific embodiment of the phase change wall system in the embodiments of the present invention;

[0047] Figure 8 It is a schematic diagram of the process of a specific embodiment of the phase change wall system in the embodiments of the present invention;

[0048] Figure 9 It is a block diagram of the component modules of a specific embodiment of the phase change wall system in the embodiments of the present invention.

[0049] Explanation of reference numerals:

[0050] Temperature sensing unit 601, data analysis unit 602, temperature regulation unit 603;

[0051] Inner wall decorative layer 701, phase change energy storage layer 702, fireproof and heat insulation layer 703, outer wall protection layer 704;

[0052] Control center 901, temperature sensing component 902, actuator 903, fireproof module 904. Specific implementation manner

[0053] The following will clearly and completely describe the concept of the present invention and the technical effects produced in combination with the embodiments to fully understand the purpose, features, and effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative efforts shall fall within the scope of protection of the present invention.

[0054] In the description of the present invention, if it involves orientation description, such as "up", "down", "front", "rear", "left", "right", etc., the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. If a certain feature is described as "set", "fixed", "connected", "installed" on another feature, it can be directly set, fixed, connected, or installed on another feature, or indirectly set, fixed, connected, or installed on another feature.

[0055] In the description of the embodiments of the present invention, if "several" is involved, it means more than one; if "multiple" is involved, it means more than two; if "greater than", "less than", or "exceeding" is involved, it should be understood as not including the present number; if "above", "below", or "within" is involved, it should be understood as including the present number. If "first" and "second" are involved, they should be understood as used to distinguish technical features, and should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0056] The current phase change wall system collects light energy through a solar collector and converts it into heat energy, exchanges heat with the ground through a soil heat exchange pipe, and then absorbs or releases heat through the solid-liquid phase change process of the phase change material to achieve the purpose of temperature control. However, this technology has many defects. First, the fire resistance of the phase change material is completely not considered. In actual building application scenarios, once a fire occurs, the phase change material may become a combustion promoter for the spread of the fire, posing a serious safety hazard. Second, it highly depends on external energy equipment. However, for example, for a solar collector, the efficiency of the solar collector is greatly affected by the weather, and the installation of the soil heat exchange pipe is also restricted by geological conditions, which not only leads to a complex structure, increases the construction difficulty and cost, but also has limited adaptability and is difficult to operate stably in various environments. Third, it lacks intelligent control means and cannot dynamically adjust the heat storage / release mode of the phase change material based on real-time temperature data, making it difficult to accurately meet the temperature control requirements at different times and in different environments.

[0057] In response to one of the above problems, the present invention proposes a control method for a phase change wall system, which can improve the efficiency of room temperature regulation and the resource utilization rate of the phase change material.

[0058] Refer to Figure 1 , Figure 1 shows a schematic flow chart of the control method for the phase change wall system in the embodiments of the present invention. In some embodiments, the phase change wall system includes a unit heat pipe array, and the control method for the phase change wall system may include, but is not limited to, steps 101 to 103:

[0059] Step 101, obtain the environmental temperature of the phase change wall system.

[0060] In step 101, the temperature at each indoor and outdoor location where the phase change wall system is located is obtained in real time, and the temperature of the phase change material in the phase change wall system is obtained. By taking the average of several temperatures, the accurate environmental temperature of the phase change wall system can be obtained, which can improve the accuracy of the temperature judgment of the environment where the phase change wall system is located.

[0061] Step 102, perform data analysis based on the environmental temperature to obtain the working mode.

[0062] Step 103: Adjust the operating parameters of the unit heat pipe array according to the operating mode and the ambient temperature.

[0063] In steps 101 to 103 illustrated in the embodiments of the present application, the temperature of the environment where the phase change wall system is located is acquired to obtain the ambient temperature, data analysis is performed based on the ambient temperature, and the operating mode that the phase change wall system needs to switch to is determined according to the result of the data analysis. After the determination is completed, the phase change wall system switches to the corresponding operating mode, and the internal controller of the phase change wall system adjusts the corresponding operating parameters of the unit heat pipe array according to the current operating mode and the ambient temperature of the system. By enabling the phase change wall system to switch the operating mode in real time according to the current ambient temperature and adjust the corresponding operating parameters of the unit heat pipe array to assist the phase change wall system in regulating the room temperature, the efficiency of the entire system in regulating the room temperature can be improved, and thus the resource utilization rate of the phase change material can be increased.

[0064] Refer to Figure 2 , Figure 2 FIG. shows a schematic flowchart of the control method of the phase change wall system in the embodiments of the present invention. In some embodiments, the operating modes include a heat dissipation mode, a heat supplement mode, and a fire mode. Performing data analysis based on the ambient temperature to obtain the operating mode specifically includes, but is not limited to, steps 201 to 203:

[0065] Step 201: Obtain the heat dissipation mode when the ambient temperature is greater than a preset first temperature.

[0066] In step 201, the preset first temperature can be set to 26°C. When the ambient temperature is greater than 26°C, it is determined that the ambient temperature where the phase change wall system is located is too high and needs to enter the heat dissipation mode. Among them, the first temperature can be set according to the specific application environment, and the present application does not specifically limit the first temperature.

[0067] Step 202: Obtain the heat supplement mode when the ambient temperature is less than a preset second temperature.

[0068] In step 202, the preset second temperature can be set to 24°C. When the ambient temperature is less than 24°C, it is determined that the ambient temperature where the phase change wall system is located is too low and needs to enter the heat supplement mode. Among them, the second temperature can be set according to the specific application environment, and the present application does not specifically limit the second temperature.

[0069] Step 203: Obtain the fire mode when the ambient temperature is greater than a preset third temperature.

[0070] In step 203, the preset third temperature can be set to 150°C. When the ambient temperature is greater than 150°C, it is determined that a fire may exist in the environment where the phase change wall system is located, and it is necessary to enter the fire mode. Among them, the third temperature can be set according to the specific application environment, and the present application does not specifically limit the third temperature.

[0071] It should be noted that by determining the ambient temperature of the current environment of the phase change wall system and switching to the corresponding mode according to the ambient temperature under different conditions, the flexibility, fire resistance and safety of the phase change wall system can be improved.

[0072] In some embodiments, when the temperature is lower than 150°C, the phase change wall system is default in a safe environment and in the normal mode. When the temperature is higher than 150°C, the phase change wall system is default in a fire environment and then switches to the fire mode. Among them, the normal mode can include a heat dissipation mode and a heat replenishment mode, and the present application does not specifically limit this.

[0073] Refer to Figure 3 , Figure 3 shows a schematic flow chart of the control method of the phase change wall system in the embodiment of the present invention. In some embodiments, the working parameters include the heat conduction path and the heat power. Adjusting the working parameters of the unit heat pipe array according to the working mode and the ambient temperature specifically includes but is not limited to steps 301 to 302:

[0074] Step 301, switch the heat conduction path of the unit heat pipe array according to the working mode.

[0075] Step 302, adjust the heat power of the unit heat pipe array according to the ambient temperature.

[0076] In steps S301 to S302 shown in this embodiment, after the phase change wall system switches to the corresponding working mode, connect the unit heat pipe array to the heat conduction path corresponding to the current working mode, calculate the heat power that the unit heat pipe array needs to be adjusted to according to the current ambient temperature, and adjust the heat power of the unit heat pipe array to the corresponding value. By switching the heat conduction path of the unit heat pipe array through the working mode of the phase change wall system and adjusting the heat power of the unit heat pipe array, the phase change wall system can quickly adjust the room temperature, which can improve the applicability and flexibility of the entire phase change wall system.

[0077] Refer to Figure 4 , Figure 4The flowchart of the control method for the phase change wall system in an embodiment of the present invention is shown. In some embodiments, the phase change wall system further includes a solenoid valve, and the heat conduction path includes: an external heat dissipation channel and an internal circulation channel. The external heat dissipation channel and the internal circulation channel are connected to the solenoid valve. Specifically, the heat conduction path of the heat pipe array according to the working mode switching unit includes but is not limited to steps 401 to 403:

[0078] Step 401, when switching to the heat dissipation mode, connect the unit heat pipe array to the external heat dissipation channel.

[0079] In step 401, when switching to the heat dissipation mode, the phase change wall system opens the external heat dissipation channel and connects the unit heat pipe array to the external heat dissipation channel, thereby enabling the phase change wall system to enter the heat dissipation state.

[0080] Step 402, when switching to the heat supplement mode, connect the unit heat pipe array to the internal circulation channel.

[0081] In step 402, when switching to the heat supplement mode, the phase change wall system opens the internal circulation channel and connects the unit heat pipe array to the internal circulation channel, thereby enabling the phase change wall system to enter the heat supplement state.

[0082] Step 403, when switching to the fire mode, close the solenoid valve.

[0083] In step 403, when switching to the fire mode, close the solenoid valve and disconnect the unit heat pipe array from the external heat dissipation channel or the internal circulation channel, thereby enabling the phase change wall system to enter the protection state.

[0084] It should be noted that after switching to the corresponding working mode, by opening the corresponding heat conduction channel, the unit heat pipe array enters the energy storage or energy dissipation working state, enabling the phase change wall system to enter the corresponding working state, which can improve the flexibility of the phase change wall system to change the working mode according to environmental factors.

[0085] Refer to Figure 5 , Figure 5 The flowchart of the control method for the phase change wall system in an embodiment of the present invention is shown. In some embodiments, adjusting the heat power of the unit heat pipe array according to the environmental temperature specifically includes but is not limited to steps 501 to 502:

[0086] Step 501, perform data analysis based on the environmental temperature to obtain the duty cycle of the solenoid valve.

[0087] In step 501, when the ambient temperature is greater than 26°C, the internal controller outputs a duty cycle signal of 75%, causing the solenoid valve to open at 75% and starting heat dissipation; when the ambient temperature is less than 24°C, the internal controller outputs a duty cycle signal of 50%, causing the solenoid valve to open at 50%, the unit heat pipe array to reverse the flow and start 200W electric heating assistance; when the ambient temperature is greater than 150°C, the fire protection system is triggered, and the internal controller outputs a duty cycle signal of 0%, closing the solenoid valve so that the solenoid valve opening is 0%.

[0088] It should be noted that through the built-in PID algorithm, the proportional, integral, and differential operations of the ambient temperature are performed to obtain the duty cycle signal, and the opening of the solenoid valve in the phase change wall system is adjusted according to the duty cycle signal, so that the opening of the solenoid valve is as close as possible to the expected target value.

[0089] Step 502, adjusting the heat power according to the duty cycle.

[0090] In step 502, when the solenoid valve opening is 75%, the flow rate of the fluid inside the unit heat pipe array is 0.5m / s, and the heat dissipation power is greater than or equal to 120W / m2; when the solenoid valve opening is 50%, the flow rate of the fluid inside the unit heat pipe array is 0.3m / s, and the heat supplement power is greater than or equal to 80W / m 2 。

[0091] It should be noted that when the phase change wall system is in different ambient temperatures, by calculating the duty cycle signal and adjusting the opening of the solenoid valve according to the duty cycle signal, the unit heat pipe array can be more useful in different ambient temperatures, which can improve the flexibility and applicability of the unit heat pipe array.

[0092] In addition, the embodiment of the present application also discloses a control device for the phase change wall system. Please refer to Figure 6 , Figure 6 which shows the module block diagram of the control device for the phase change wall system. The control method of the phase change wall system can be realized. The control device for the phase change wall system includes: a temperature sensing unit 601, a data analysis unit 602, and a temperature regulation unit 603. The temperature sensing unit 601, the data analysis unit 602, and the temperature regulation unit 603 are all communicatively connected.

[0093] The temperature sensing unit 601 is used to obtain the ambient temperature of the phase change wall system. The data analysis unit 602 is used to perform data analysis according to the ambient temperature to obtain the working mode of the unit heat pipe array. The temperature regulation unit 603 is used to adjust the working parameters of the unit heat pipe array according to the working mode and the ambient temperature.

[0094] The temperature sensing unit 601 obtains the temperature of the environment where the phase change wall system is located to get the ambient temperature. The data analysis unit 602 conducts data analysis based on the ambient temperature and determines the working mode that the phase change wall system needs to switch to according to the result of the data analysis. After the determination is completed, the phase change wall system switches to the corresponding working mode. The temperature control unit 603 adjusts the corresponding working parameters of the unit heat pipe array respectively according to the current working mode of the system and the ambient temperature. By enabling the phase change wall system to switch the working mode in real time according to the current ambient temperature, adjusting the corresponding working parameters of the unit heat pipe array, and assisting the phase change wall system to regulate the room temperature, the efficiency of the whole system in regulating the room temperature can be improved, and further the resource utilization rate of the phase change material can be increased.

[0095] Among them, the operation process of the control device of the phase change wall system in this embodiment is specifically referred to the above description Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 The control method steps S101 to S103, steps S201 to S203, steps S301 and S302, steps S401 to S403, and steps S501 and S502 of the phase change wall system in [references] are not elaborated here.

[0096] Another embodiment of the present invention discloses a phase change wall system. Referring to Figure 7 , Figure 7 shows a schematic diagram of the wall structure of the phase change wall system. The wall structure of the phase change wall system includes: an inner wall decoration layer 701, a phase change energy storage layer 702, a fireproof and heat-insulating layer 703, and an outer wall protection layer 704.

[0097] The inner wall decoration layer 701 includes a gypsum board with a thickness of 12 mm, a thermal conductivity of 0.17 W / (m·K), and a fire protection grade of A1. The phase change energy storage layer 702 includes a composite phase change material with a thickness of 50 mm. The composite phase change material includes: paraffin or C20 alkane, sodium acetate trihydrate, with a phase change temperature between 24 and 28 °C and a latent heat value greater than or equal to 120 J / g, encapsulated in an aluminum honeycomb structure. The fireproof and heat-insulating layer 703 includes an expanded perlite-based composite material with a thickness of 30 mm. The fire resistance limit of the expanded perlite-based composite material is greater than or equal to 2 h, the thermal conductivity is 0.048 W / (m·K), and it contains a magnesium aluminum silicate flame retardant. The outer wall protection layer 704 is used to resist the erosion of the environment and protect the inner wall decoration layer, the phase change energy storage layer, and the fireproof and heat-insulating layer.

[0098] It should be noted that the phase change energy storage layer is the key part for achieving temperature regulation. It is made by mixing composite phase change materials with lightweight aggregates. Among them, the composite phase change materials are made by mixing paraffin / C15-C33 alkanes with calcium chloride hexahydrate, and the lightweight aggregates include expanded perlite. Paraffin / C15-C33 alkanes have good phase change energy storage characteristics, and calcium chloride hexahydrate can further optimize the phase change performance. The combination of the two controls the phase change temperature between 18 and 30 °C. The temperature range of 18 to 30 °C meets the demand range of the human body for indoor comfortable temperature. Moreover, the phase change enthalpy of the composite phase change materials is greater than or equal to 120 J / g, which can ensure that sufficient heat can be absorbed or released during the phase change process. In addition, the lightweight aggregate expanded perlite can not only reduce the weight of the wall, but also increase the porosity of the material and enhance the energy storage effect.

[0099] The fireproof and thermal insulation layer is made by compounding inorganic high-temperature resistant cementitious materials with flame retardants. Among them, the inorganic high-temperature resistant cementitious materials can include portland cement, and the flame retardants can include magnesium aluminum silicate. The thermal conductivity of the fireproof and thermal insulation layer is less than or equal to 0.05 W / (m · K), and the thermal conductivity of 0.05 W / (m · K) can effectively prevent the transfer of heat and play a good thermal insulation role. The fire resistance rating is greater than or equal to 2 h. In case of a fire, it can maintain the stability of the wall structure for a long time and prevent the spread of fire.

[0100] In some embodiments, the phase change wall system further includes: a digital temperature sensor of model DS18B20 with an accuracy of 0.5 °C, which is arranged in the phase change energy storage layer, and is arranged on the inner and outer surfaces of the phase change wall system for monitoring the ambient temperature of the phase change wall system.

[0101] It should be noted that the accuracy of the DS18B20 digital temperature sensor is ±0.5 °C, the temperature measurement range is between -55 °C and 125 °C, and the sampling frequency is 1 Hz. The layout of the DS18B20 digital temperature sensor includes: embedded in the core position of the phase change energy storage layer for monitoring the state of the phase change materials, such as solid or liquid state. And the DS18B20 digital temperature sensor is also arranged on the indoor and outdoor surfaces. For example, 1 to 3 DS18B20 digital temperature sensors are arranged per square meter to provide real-time feedback on the ambient temperature gradient map. In addition, the ambient temperature is transmitted to the internal controller of the phase change wall system in real time through the 1-Wire single-bus protocol.

[0102] In some embodiments, the phase change wall system further includes: a unit heat pipe array. The unit heat pipe includes a copper pipe with a diameter of 5 to 9 mm, and is filled with Al2O3-water-based nanofluid with a thermal conductivity of 0.65 W / (m·K). It is embedded in a grid pattern between the phase change energy storage layer and the fireproof and thermal insulation layer with a spacing of 50 mm, and the total heat conduction area is greater than or equal to 2.5 m 2 / m2 。

[0103] It should be noted that nano-scale Al2O3 particles have a very large specific surface area and relatively high thermal conductivity. After being mixed with water, they can significantly improve the thermophysical properties of the working fluid, such as thermal conductivity and specific heat capacity. Compared with traditional pure water working fluids, Al2O3-water-based nanofluids can absorb and transfer heat more effectively, thereby enhancing the heat dissipation capacity of the heat pipe.

[0104] In addition, each unit heat pipe includes an evaporation section, a condensation section, and an adiabatic section. The pipe wall of the unit heat pipe is usually made of metal materials such as copper and aluminum, which have good thermal conductivity. Inside the unit heat pipe, after the Al2O3-water-based nanofluid absorbs heat in the evaporation section, the working fluid evaporates to form steam. The steam flows in the heat pipe to the condensation section, where it condenses into a liquid when cooled, and then returns to the evaporation section through capillary force or gravity, repeating this cycle to achieve efficient heat transfer.

[0105] In some embodiments, the flow direction and rate of the heat-conducting medium are controlled by a solenoid valve. Among them, the heat-conducting medium includes water and / or nanofluid. Water has a relatively high specific heat capacity and can effectively transfer heat. The nanofluid has more advantages in thermal conductivity due to its special nano-scale particle structure. The appropriate heat-conducting medium can be selected according to actual needs. For example: when the ambient temperature is lower than 24°C, the internal controller activates the electric heating auxiliary module to provide additional heat to the phase change material, prompting it to solidify and release heat, releasing the stored heat into the room, guiding the phase change material to naturally solidify and release heat to maintain the warmth of the room.

[0106] When the ambient temperature is higher than 26°C, the internal controller switches the unit heat pipe to be connected to the external heat dissipation channel. Utilizing the high-efficient heat-conducting performance of the heat pipe, it provides additional heat to the phase change material, prompting it to liquefy and absorb heat, and quickly transferring the indoor heat to the outside. At the same time, combined with night ventilation, when the outdoor temperature is relatively low at night, cold air is introduced to further reduce the indoor temperature. At this time, the phase change material can also absorb part of the heat to enhance the cooling effect.

[0107] In addition, when the DS18B20 digital temperature sensor detects a fire signal, the inorganic high-temperature resistant gelling material in the fireproof layer reacts with the flame retardant, quickly expands to form a heat insulation barrier to prevent the spread of fire. The phase change material undergoes a phase change after absorbing heat, absorbing a large amount of heat, delaying the development of the fire, and buying time for personnel evacuation and fire fighting and rescue. It can effectively solve problems such as poor fireproof performance of the phase change material, dependence of the temperature control system on external energy and poor adaptability, and lack of intelligent regulation, realizing the functions of high-efficiency energy saving, intelligent temperature control, and fire safety of the building.

[0108] In some embodiments, refer to Figure 8 , Figure 8A schematic flowchart of the phase change wall system in an embodiment of the present invention is shown. By monitoring the temperatures of the indoor, outdoor, and the phase change energy storage layer in the phase change wall system, the ambient temperature is obtained, and the monitored ambient temperature is transmitted in real time. The heat conduction path is dynamically adjusted according to the ambient temperature. If the ambient temperature is higher than the high temperature preset value, it switches to the heat dissipation mode, calculates the duty cycle signal, and adjusts the opening degree of the solenoid valve so that the unit heat pipe array conducts heat in a directional manner; if the ambient temperature is lower than the low temperature preset value, it switches to the heat supplement mode, calculates the duty cycle signal, adjusts the opening degree of the solenoid valve, sends a heating instruction, and conducts low-temperature auxiliary heating; if the ambient temperature is higher than the fire preset value, it switches to the fire mode, sends a fire alarm signal, the expansion heat insulation layer is triggered, and the unit heat pipe array conducts heat in a directional manner in cooperation to achieve heat transfer.

[0109] In some embodiments, referring to Figure 9 , Figure 9 A component module block diagram of the phase change wall system in an embodiment of the present invention is shown. The phase change wall system includes: a control center 901, a temperature sensing component 902, an actuator 903, and a fire protection module 904. The control center 901, the temperature sensing component 902, the actuator 903, and the fire protection module 904 are all communicatively connected. Among them, the actuator 903 includes a unit heat pipe array and an electric heating auxiliary module. The temperature sensing component 902 monitors the temperatures of the indoor, outdoor, and the phase change energy storage layer in the phase change wall system, obtains the ambient temperature, and transmits the monitored ambient temperature in real time. The control center 901 dynamically adjusts the heat conduction path according to the ambient temperature. If the ambient temperature is higher than the high temperature preset value, it switches to the heat dissipation mode, calculates the duty cycle signal, and adjusts the opening degree of the solenoid valve so that the unit heat pipe array in the actuator 903 conducts heat in a directional manner; if the ambient temperature is lower than the low temperature preset value, it switches to the heat supplement mode, calculates the duty cycle signal, adjusts the opening degree of the solenoid valve, sends a heating instruction, and conducts low-temperature auxiliary heating through the electric heating auxiliary module in the actuator 903; if the ambient temperature is higher than the fire preset value, it switches to the fire mode, sends a fire alarm signal, the expansion heat insulation layer in the fire protection module 904 is triggered, and the unit heat pipe array in the actuator 903 conducts heat in a directional manner in cooperation to achieve heat transfer.

[0110] Another embodiment of the present invention discloses a computer-readable storage medium. The storage medium includes: the storage medium stores computer-executable instructions, and the computer-executable instructions are used to cause a computer to execute Figure 1 the control method steps S101 to S103 in Figure 2 the control method steps S201 to S203 in Figure 3 the control method steps S301 and S302 in Figure 4 the control method steps S401 to S403 in Figure 5The control method of the phase change wall system in steps S501 and S502.

[0111] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0112] Those of ordinary skill in the art can understand that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, and their appropriate combinations. Some physical components or all physical components can be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include a computer storage medium (or non-transitory medium) and a communication medium (or transitory medium). As is well known to those of ordinary skill in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information, such as computer-readable instructions, data structures, program modules, or other data. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory, or other memory technologies, CD-ROM, digital versatile disc (DVD), or other optical disc storage, magnetic cassette, tape, magnetic disk storage, or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer. In addition, as is well known to those of ordinary skill in the art, a communication medium typically contains computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transmission mechanism, and can include any information delivery medium.

[0113] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the relevant art, various changes can be made without departing from the purpose of the present invention. In addition, without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

Claims

1. A control method for a phase change wall system, characterized in that The phase change wall system includes a unit heat pipe array, and the method includes: Obtaining the ambient temperature of the phase change wall system; Performing data analysis based on the ambient temperature to obtain a working mode; Adjusting the working parameters of the unit heat pipe array according to the working mode and the ambient temperature.

2. The method according to claim 1, characterized in that The working mode includes a heat dissipation mode, a heat supplement mode, and a fire mode. The performing data analysis based on the ambient temperature to obtain a working mode includes: Obtaining the heat dissipation mode when the ambient temperature is greater than a preset first temperature; Obtaining the heat supplement mode when the ambient temperature is less than a preset second temperature; Obtaining the fire mode when the ambient temperature is greater than a preset third temperature.

3. The method according to claim 2, wherein The working parameters include a heat conduction path and a heat power. The adjusting the working parameters of the unit heat pipe array according to the working mode and the ambient temperature includes: Switching the heat conduction path of the unit heat pipe array according to the working mode; Adjusting the heat power of the unit heat pipe array according to the ambient temperature.

4. The method according to claim 3, wherein The phase change wall system further includes a solenoid valve. The heat conduction path includes an external heat dissipation channel and an internal circulation channel. The external heat dissipation channel and the internal circulation channel are connected to the solenoid valve. The switching the heat conduction path of the unit heat pipe array according to the working mode includes: Connecting the unit heat pipe array to the external heat dissipation channel when switching to the heat dissipation mode; Connecting the unit heat pipe array to the internal circulation channel when switching to the heat supplement mode; Closing the solenoid valve when switching to the fire mode.

5. The method according to claim 4, characterized in that, The adjusting the heat power of the unit heat pipe array according to the ambient temperature includes: Performing data analysis based on the ambient temperature to obtain the duty ratio of the solenoid valve; Adjusting the heat power according to the duty ratio.

6. A control device for a phase change wall system, characterized in that, The phase change wall system includes a unit heat pipe array, and the device includes: A temperature sensing unit for obtaining the ambient temperature of the phase change wall system; A data analysis unit for performing data analysis based on the ambient temperature to obtain the working mode of the unit heat pipe array; A temperature control unit for adjusting the working parameters of the unit heat pipe array according to the working mode and the ambient temperature.

7. A phase change wall system, characterized in that, The wall structure of the phase change wall system includes: An inner wall decorative layer, including a 12-mm-thick gypsum board with a thermal conductivity of 0.17 W / (m·K) and a fire protection grade of A1; A phase change energy storage layer, including a 50-mm-thick composite phase change material. The composite phase change material includes paraffin or C20 alkane and sodium acetate trihydrate, with a phase change temperature between 24 and 28 °C and a latent heat value greater than or equal to 120 J / g, encapsulated in an aluminum honeycomb structure; A fireproof and heat-insulating layer, including a 30-mm-thick expanded perlite-based composite material with a fire resistance limit greater than or equal to 2 h, a thermal conductivity of 0.048 W / (m·K), and containing magnesium aluminum silicate flame retardant; An outer wall protective layer for resisting environmental erosion and protecting the inner wall decorative layer, the phase change energy storage layer, and the fireproof and heat-insulating layer.

8. The system according to claim 7, wherein The system further includes: a digital temperature sensor of the DS18B20 model, with an accuracy of 0.5 °C, which is disposed within the phase change energy storage layer, and is disposed on the inner and outer surfaces of the phase change wall system for monitoring the ambient temperature of the phase change wall system.

9. The phase change wall system according to claim 7, characterized in that, The system further includes: The unit heat pipe array includes copper pipes with a diameter of 5 to 9 mm, filled with Al2O3-water-based nanofluid with a thermal conductivity of 0.65 W / (m·K) inside, and is embedded in a grid pattern between the phase change energy storage layer and the fireproof and heat-insulating layer with a spacing of 50 mm, and the total heat conduction area is greater than or equal to 2.5 m 2 / m 2 .

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to cause a computer to execute the control method of the phase change wall system according to any one of claims 1 to 5.

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