Solar cross-seasonal heat storage cold and heat dual-supply system

Abstract

The invention relates to the technical field of energy control, in particular to a solar cross-seasonal heat storage cold and heat dual-supply system which comprises a solar heat collection module, a layered heat storage module, a soil temperature monitoring module, a heat storage control module, a cold and heat dual-supply switching module and a ground source heat pump compensation module. Wherein the solar heat collection module is used for converting solar energy into a high-temperature heat-carrying medium; the layered heat storage module is used for receiving the high-temperature heat-carrying medium; the soil temperature monitoring module is used for collecting soil temperature data; the heat storage control module is used for generating a medium flow direction instruction; and the cold and heat supply switching module is used for switching to a heat supply pipeline or a cold supply pipeline according to the seasonal mode. According to the system, by accurately controlling the soil temperature, intelligently adjusting the flow direction of the high-temperature heat-carrying medium and switching the cold and heat dual-supply mode, the heat energy storage and release efficiency of the system is remarkably improved, cross-seasonal stable operation is guaranteed, and energy utilization and system adaptability are effectively optimized.

Description

Technical Field

[0001] The invention relates to the technical field of energy control, and in particular to a solar energy cross-seasonal heat storage and dual cooling and heating supply system. Background Art

[0002] With the rapid development of renewable energy, solar energy has been widely used around the world as a clean and environmentally friendly energy source. The solar inter-seasonal thermal storage system uses solar thermal collection modules to collect and store heat in summer to meet winter heating needs. Existing solar thermal storage systems usually use phase change materials as energy storage media to achieve the storage and release of thermal energy through their physical properties. However, in the prior art, such systems often face the problems of large soil temperature changes and difficulty in effectively regulating the temperature of the thermal storage body, resulting in uneven heat distribution in the system under different seasons and different environmental conditions, making it difficult to maintain the stability and efficiency of the thermal storage system.

[0003] Current technical solutions often lack a dynamic adjustment mechanism and are unable to adjust the temperature stratification of the thermal storage system in real time, which greatly reduces the heat exchange efficiency of the high-temperature heat carrier and phase change material. At the same time, under extreme climatic conditions, the soil temperature may exceed the design temperature range of the thermal storage system, resulting in overheating or overcooling, which in turn affects the stable operation and energy efficiency of the system. In addition, most existing technologies lack effective soil temperature monitoring and control methods, which makes it impossible to accurately adjust the switching of the hot and cold dual supply pipelines, and cannot be adjusted intelligently according to actual needs, thereby affecting the heat allocation and temperature management of the overall system. Summary of the invention

[0004] Based on the above objectives, the present invention provides a solar energy cross-seasonal heat storage and dual heat and cold supply system.

[0005] A solar energy cross-seasonal heat storage and dual-supply system for heat and cold, comprising a solar energy heat collection module, a layered heat storage module, a soil temperature monitoring module, a heat storage control module, a dual-supply switching module for heat and cold, and a ground source heat pump compensation module; wherein:

[0006] Solar thermal collection module: used to convert solar energy into high-temperature heat-carrying medium;

[0007] Layered heat storage module: comprising a heat storage body, the heat storage body is used to receive the high-temperature heat medium provided by the solar heat collection module;

[0008] Soil temperature monitoring module: used to collect soil temperature data at a depth of 10-20 meters underground in the target area in real time;

[0009] Thermal storage control module: used to generate medium flow instructions according to soil temperature data, control the high-temperature heat-carrying medium to be injected into each temperature layer of the stratified thermal storage module in sequence, and ensure the distribution and storage of heat in the thermal storage body;

[0010] Hot and cold dual supply switching module: includes a three-way reversing valve and is connected to the output end of the stratified heat storage module, and is used to switch to the heating pipeline or the cooling pipeline according to the seasonal mode to achieve hot and cold dual supply function;

[0011] Ground source heat pump compensation module: It is linked to the heat storage control module through a U-shaped buried pipe and is used to start the ground source heat pump for temperature compensation when the soil temperature exceeds the preset threshold to keep the system temperature within a predetermined range.

[0012] Optionally, the solar thermal collection module includes a solar thermal collection panel unit, a heat exchange pipe unit and a heat transfer medium unit; wherein:

[0013] Solar collector panel unit: including multiple solar collector panels, the surfaces of which are coated with heat-absorbing materials, including chromium alloy, aluminum alloy, copper alloy or graphene, for absorbing solar radiation heat energy and converting solar energy into heat energy;

[0014] Heat exchange pipe unit: comprising a plurality of heat exchange pipes, the heat exchange pipes are connected to the solar collector plate through a fluid, wherein the fluid is a heat transfer medium selected from water or ethylene glycol solution;

[0015] Heat transfer medium unit: includes a heat carrier medium, which is a heat transfer liquid selected from water, ethylene glycol solution or polypropylene alcohol solution, and can absorb and transfer heat at a low flow rate.

[0016] Optionally, the layered heat storage module includes a heat storage unit, a heat exchange channel unit and a thermal short circuit prevention baffle unit; wherein:

[0017] Thermal storage unit: comprising a plurality of phase change material thermal storage bodies, used for absorbing and storing heat energy when receiving a high-temperature heat carrier medium; the thermal storage body is a porous structure; the melting point range of the phase change material is set between 50-90°C;

[0018] Heat exchange channel unit: includes multiple heat exchange channels, which are arranged along the inside of the heat storage body and are designed as a serpentine or spiral structure to maximize the contact area with the high-temperature heat medium; the high-temperature heat medium enters the heat exchange channel through the heat exchange pipe, contacts the heat storage body, transfers heat to the phase change material, and causes the phase change material to absorb heat;

[0019] Anti-thermal short-circuit baffle unit: used to deploy anti-thermal short-circuit baffles between different temperature layers of the heat storage body to prevent heat mixing between different temperature layers and ensure stratified storage of heat; the anti-thermal short-circuit baffle is made of stainless steel or ceramic material.

[0020] Optionally, the soil temperature monitoring module includes a soil temperature sensing unit, a data acquisition unit and a data transmission unit; wherein:

[0021] Soil temperature sensing unit: It includes multiple temperature sensors and is buried at different locations at a depth of 10-20 meters underground in the target area to monitor the soil temperature of the target area in real time; the measurement range of each sensor is set to -40 to 100°C;

[0022] Data acquisition unit: used to receive signals from the soil temperature sensing unit, and amplify, filter and digitize the signals to ensure the accuracy and stability of the data;

[0023] Data transmission unit: used to transmit the processed soil temperature data to the thermal storage control module. The data transmission adopts wireless communication, and the communication protocol is RS485, Zigbee or LoRa.

[0024] Optionally, the heat storage control module includes a temperature data processing unit, a temperature threshold judgment unit and a medium flow direction instruction generation unit; wherein:

[0025] Temperature data processing unit: used to receive real-time soil temperature data from the soil temperature monitoring module, and perform data cleaning and filtering. The processed temperature data is smoothed by an interpolation algorithm to obtain the soil temperature change trend;

[0026] Temperature threshold judgment unit: used to compare the processed soil temperature data with the preset upper and lower temperature thresholds to determine whether the current soil temperature is within the preset range, and then decide whether the medium flow direction needs to be adjusted;

[0027] Medium flow direction instruction generating unit: used to generate instructions for controlling the flow direction of high-temperature heat-carrying medium according to the judgment result of the temperature threshold judgment unit, combined with the soil temperature change trend and the set working mode.

[0028] Optionally, the temperature data processing unit includes:

[0029] Data cleaning: Use statistical methods to identify outliers in temperature data; determine whether a data point is an outlier by calculating the Z-Score value of each data point; if the Z-Score value exceeds the set threshold, the data point is considered an outlier and deleted from the data set;

[0030] Data filtering: Apply a low-pass filter to the cleaned temperature data for smoothing to remove high-frequency noise;

[0031] Interpolation algorithm: Apply the interpolation algorithm to the processed data to smooth the data curve and fill in the missing data. The calculation formula is: Among them, S(x) is the interpolation function, x i is the data point, a i ,b i ,c i,d i is the coefficient of spline interpolation, and n is the total number of interpolation data points;

[0032] Trend analysis: Use the smoothed data for trend analysis to calculate the long-term trend and short-term fluctuations of soil temperature changes to identify the patterns of soil temperature changes.

[0033] Optionally, the temperature threshold judgment unit includes:

[0034] Preset temperature range determination: Set the ideal operating range of soil temperature, including the upper temperature T max and lower limit temperature T min ;

[0035] Current soil temperature acquisition: Receive real-time soil temperature data from the soil temperature monitoring module, denoted as T current and compare it with the set temperature range;

[0036] Temperature range comparison: determine the current soil temperature T current Is it within the preset temperature range? If the current soil temperature T current If the current soil temperature is greater than the upper limit temperature, it means that the system has entered an overheating state and cooling measures need to be initiated. current Less than the lower limit temperature T min , it means that the soil temperature is too low and the heating function needs to be enabled.

[0037] Optionally, the medium flow instruction generating unit includes:

[0038] Receiving temperature judgment result: receiving the judgment result of the temperature threshold judgment unit to determine whether the current soil temperature exceeds the set temperature range;

[0039] Soil temperature change trend: Based on the soil temperature change trend data output by the temperature data processing unit, the soil temperature change rate is calculated through the interpolation algorithm;

[0040] Determine the working mode: According to the set working mode, determine whether it is in heating mode, cooling mode or normal mode;

[0041] Flow direction instruction generation: Generate instructions for controlling the flow direction of high-temperature heat carrier medium based on temperature judgment results, soil temperature change rate and working mode;

[0042] When the system enters the heating mode and the soil temperature change rate is negative, indicating that the temperature is decreasing, a command is generated to increase the flow rate of the heat medium and preferentially inject it into the low temperature layer to heat the soil;

[0043] When the system enters the cooling mode and the soil temperature change rate is positive, indicating that the temperature is rising, a command is generated to increase the flow rate of the cold medium and preferentially inject it into the high-temperature layer to reduce the temperature;

[0044] If the soil temperature change rate is zero, indicating that the temperature change trend is stable, the instruction maintains the current flow direction and flow rate.

[0045] Optionally, the hot and cold dual supply switching module includes a seasonal mode judgment unit, a pipeline switching control unit and a three-way reversing valve driving unit; wherein:

[0046] Season mode judgment unit: used to judge the current season mode according to the external environment temperature or the time period set by the user, and the judgment result is heating mode or cooling mode;

[0047] Pipeline switching control unit: used to control the three-way reversing valve to switch the heating pipeline or the cooling pipeline according to the judgment result of the season mode judgment unit; if the heating mode is entered, the pipeline switching control unit controls the three-way reversing valve to switch to the heating pipeline to transport the high-temperature heat medium to the area that needs to be heated; if the cooling mode is entered, the three-way reversing valve is controlled to switch to the cooling pipeline to transport the cooling medium to the area that needs to be cooled;

[0048] Three-way reversing valve drive unit: used to receive instructions from the pipeline switching control unit, and perform physical switching by electrically or pneumatically driving the three-way reversing valve to ensure that the heat carrier medium can correctly enter the heating or cooling pipeline.

[0049] Optionally, the ground source heat pump compensation module includes a temperature threshold judgment unit, a ground source heat pump starting unit and a temperature compensation control unit; wherein:

[0050] Temperature threshold judgment unit: used to determine the soil temperature according to the preset soil temperature threshold T threshold Determine the current soil temperature T current Whether it exceeds the threshold; if the current soil temperature T current Greater than T threshold , the judgment unit outputs a start signal to the heat pump drive unit; if the soil temperature does not exceed the threshold, the system maintains the current state without compensation;

[0051] Ground source heat pump start-up unit: used to judge the soil temperature T in the temperature threshold judgment unit current Exceeding the set threshold T threshold , providing a start signal to the ground source heat pump;

[0052] Temperature compensation control unit: used to adjust the temperature according to the soil temperature T current With the target temperature T targett The difference is calculated, the temperature that needs to be compensated is calculated, and the excess heat is compensated by adjusting the output power of the ground source heat pump.

[0053] Beneficial effects of the present invention:

[0054] The present invention, by combining real-time soil temperature monitoring with dynamic temperature regulation, can accurately control the flow direction and temperature change of the high-temperature heat carrier medium, solving the problems of poor system stability and uneven heat distribution caused by soil temperature fluctuations in the prior art; by introducing a stratified heat storage module and a temperature control module, the system can achieve stratified temperature storage and precise regulation, ensuring that the optimal operating temperature range of the phase change material is maintained, greatly improving the efficiency of thermal energy storage and release.

[0055] The present invention further improves the adaptability and flexibility of the system by intelligently switching between hot and cold dual supply pipelines and automatically adjusting the heating and cooling modes according to seasonal changes; the addition of a ground source heat pump enables the system to start in time when the soil temperature exceeds a preset threshold and perform temperature compensation, thereby avoiding overheating or overcooling and ensuring that the system can operate efficiently in different seasons and climatic conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0057] Figure 1 Schematic diagram of a solar energy cross-seasonal heat storage and dual cooling and heating supply system according to an embodiment of the present invention;

[0058] Figure 2 Schematic diagram of a heat storage control module according to an embodiment of the present invention. DETAILED DESCRIPTION

[0059] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternatives to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0060] It should be noted that the references to "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0061] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0062] like Figure 1-Figure 2 As shown, a solar energy cross-seasonal heat storage and dual-supply system for heat and cold includes a solar energy collection module, a layered heat storage module, a soil temperature monitoring module, a heat storage control module, a dual-supply switching module for heat and cold, and a ground source heat pump compensation module; wherein:

[0063] Solar thermal collection module: used to convert solar energy into high-temperature heat-carrying medium. The solar thermal collection module includes several solar thermal collection panels and heat exchange pipes. The solar energy is converted into heat energy through the thermal collection panels, and the heat is transferred to the heat-carrying medium through the heat exchange pipes.

[0064] Layered heat storage module: includes a heat storage body, which is used to receive the high-temperature heat medium provided by the solar thermal collection module. The inner part of the heat storage body is divided into a top high-temperature layer, a middle transition layer and a bottom low-temperature layer, and a heat-proof short-circuit partition is provided between each layer to prevent heat mixing between different temperature layers;

[0065] Soil temperature monitoring module: used to collect soil temperature data at a depth of 10-20 meters underground in the target area in real time;

[0066] Thermal storage control module: used to generate medium flow instructions according to soil temperature data, control the high-temperature heat-carrying medium to be injected into each temperature layer of the stratified thermal storage module in sequence, and ensure the distribution and storage of heat in the thermal storage body;

[0067] Hot and cold dual supply switching module: includes a three-way reversing valve and is connected to the output end of the stratified heat storage module, and is used to switch to the heating pipeline or the cooling pipeline according to the seasonal mode to achieve hot and cold dual supply function;

[0068] Ground source heat pump compensation module: It is linked to the heat storage control module through a U-shaped buried pipe and is used to start the ground source heat pump for temperature compensation when the soil temperature exceeds the preset threshold to keep the system temperature within a predetermined range.

[0069] The solar heat collection module includes a solar heat collection panel unit, a heat exchange pipe unit and a heat transfer medium unit; wherein:

[0070] Solar collector panel unit: including multiple solar collector panels, the surfaces of which are coated with heat-absorbing materials, including chromium alloy, aluminum alloy, copper alloy or graphene, for absorbing solar radiation heat energy and converting solar energy into heat energy;

[0071] Heat exchange pipe unit: including multiple heat exchange pipes, which are connected to the solar collector through fluids, the fluids are heat transfer media selected from water or ethylene glycol solution, and the heat exchange pipes are made of stainless steel or copper alloy materials, which have strong high temperature resistance and corrosion resistance, can ensure long-term and efficient heat transfer and withstand high working temperatures;

[0072] Heat transfer medium unit: includes a heat carrier medium, which is a heat transfer liquid selected from water, ethylene glycol solution or polypropylene alcohol solution, has high specific heat capacity and thermal conductivity, and can absorb and transfer heat at a low flow rate; the heat transfer medium can adjust its fluidity according to the ambient temperature to ensure efficient transfer of thermal energy and adapt to the needs of the system; through the synergistic effect of the above-mentioned multiple units, the solar thermal collection module can efficiently convert solar radiation energy into high-temperature heat carrier medium, and effectively transfer it to the stratified heat storage module for storage, thereby realizing cross-seasonal heat storage and utilization.

[0073] The layered heat storage module includes a heat storage unit, a heat exchange channel unit and a thermal short circuit protection baffle unit; wherein:

[0074] Thermal storage unit: includes multiple phase change material (PCM) thermal storage bodies, which have high melting latent heat and are used to absorb and store thermal energy when receiving high-temperature heat carrier medium; the thermal storage body is a porous structure to enhance thermal conductivity and improve heat storage efficiency; the melting point range of the phase change material is set between 50-90°C, so as to effectively absorb heat at higher temperatures and release heat when needed;

[0075] Heat exchange channel unit: includes multiple heat exchange channels, which are arranged along the inside of the heat storage body and are designed as a serpentine or spiral structure to maximize the contact area with the high-temperature heat medium, thereby improving the heat exchange efficiency; the high-temperature heat medium enters the heat exchange channel through the heat exchange pipe, contacts the heat storage body, transfers heat to the phase change material, and causes the phase change material to absorb heat;

[0076] Anti-thermal short-circuit baffle unit: used to deploy anti-thermal short-circuit baffles between different temperature layers of the heat storage body to prevent heat mixing between different temperature layers and ensure stratified storage of heat; the anti-thermal short-circuit baffles are made of stainless steel or ceramic materials to ensure a long service life in a high-temperature environment, and can effectively isolate the heat flow of different temperature layers to prevent heat from flowing from the high-temperature layer to the low-temperature layer; through the synergistic effect of the above-mentioned multiple units, the stratified thermal storage module can efficiently receive and store the high-temperature heat carrier provided by the solar thermal collection module, and distribute and store heat between different temperature layers through phase change materials, thereby realizing long-term cross-seasonal thermal energy storage and utilization.

[0077] The soil temperature monitoring module includes a soil temperature sensing unit, a data acquisition unit and a data transmission unit; wherein:

[0078] Soil temperature sensing unit: It includes multiple temperature sensors, which are buried at different locations at a depth of 10-20 meters underground in the target area. They are used to monitor the soil temperature of the target area in real time. The temperature sensors are high-precision thermocouples or RTD sensors that can provide stable temperature measurement data under different soil conditions. The measurement range of each sensor is set to -40 to 100°C to ensure accurate data collection under various soil temperatures.

[0079] Data acquisition unit: used to receive signals from the soil temperature sensing unit, and amplify, filter and digitize the signals to ensure the accuracy and stability of the data;

[0080] Data transmission unit: used to transmit the processed soil temperature data to the thermal storage control module. The data transmission adopts wireless communication. The communication protocol selects RS485, Zigbee or LoRa to ensure the accuracy of remote monitoring. Through the collaborative work of the above units, the soil temperature monitoring module can collect soil temperature data at a depth of 10-20 meters underground in the target area in real time and accurately, and provide real-time temperature data support for the thermal storage control module to achieve temperature regulation and thermal storage optimization.

[0081] The heat storage control module includes a temperature data processing unit, a temperature threshold judgment unit and a medium flow direction instruction generation unit; wherein:

[0082] Temperature data processing unit: used to receive real-time soil temperature data from the soil temperature monitoring module, and perform data cleaning and filtering to ensure the accuracy and continuity of the data. The processed temperature data is smoothed by an interpolation algorithm to obtain the soil temperature change trend;

[0083] Temperature threshold judgment unit: used to compare the processed soil temperature data with the preset upper and lower temperature thresholds to determine whether the current soil temperature is within the preset range, and then decide whether the medium flow direction needs to be adjusted;

[0084] Medium flow direction instruction generation unit: used to generate instructions for controlling the flow direction of high-temperature heat-carrying medium according to the judgment result of the temperature threshold judgment unit, combined with the soil temperature change trend and the set working mode (such as winter heating or summer cooling mode); through the collaboration of the above units, the heat storage control module can generate and adjust the medium flow direction instructions according to the real-time changes in soil temperature, optimize the thermal energy storage process, and ensure efficient and stable operation of the system.

[0085] The temperature data processing unit includes:

[0086] Data cleaning: Use statistical methods to identify outliers in temperature data; determine whether a data point is an outlier by calculating the Z-Score value of each data point; if the Z-Score value exceeds the set threshold, the data point is considered an outlier and deleted from the data set;

[0087] Data filtering: Apply a low-pass filter to the cleaned temperature data for smoothing to remove high-frequency noise;

[0088] Interpolation algorithm: Apply the interpolation algorithm to the processed data to smooth the data curve and fill in the missing data. The calculation formula is: Among them, S(x) is the interpolation function, x i is the data point, a i ,b i ,c i ,d i are the coefficients of spline interpolation, and n is the total number of interpolation data points; these coefficients are obtained by solving a system of linear equations to ensure smooth changes in temperature data;

[0089] Trend analysis: Use the smoothed data for trend analysis to calculate the long-term trend and short-term fluctuation of soil temperature change to identify the law of soil temperature change; trend analysis is performed using linear regression or exponential smoothing method, and the specific calculation formula is: T t =αx t +(1-α)T t-1 , where T t is the smoothed temperature, x t is the current temperature data, T t-1 is the smoothed temperature at the previous moment, and α is the smoothing factor (0<α<1). Through the above steps, the temperature data processing unit can effectively smooth the soil temperature data and obtain a stable temperature change trend through the interpolation algorithm.

[0090] The temperature threshold judgment unit includes:

[0091] Preset temperature range determination: Set the ideal operating range of soil temperature, including the upper temperature T maxand lower limit temperature T min The upper limit temperature is the maximum allowable temperature of the soil under the optimal heat storage state, while the lower limit temperature is the minimum temperature, below which the heat storage efficiency will decrease and the system will enter the protection mode;

[0092] Current soil temperature acquisition: Receive real-time soil temperature data from the soil temperature monitoring module, denoted as T current and compare it with the set temperature range;

[0093] Temperature range comparison: determine the current soil temperature T current Is it within the preset temperature range? If the current soil temperature T current If the current soil temperature is greater than the upper limit temperature, it means that the system has entered an overheating state and cooling measures need to be initiated. current Less than the lower limit temperature T min , it means that the soil temperature is too low and the heating function needs to be enabled; through the above steps, the temperature threshold judgment unit can accurately judge whether the soil temperature is within the preset range, provide a judgment basis for the medium flow instruction generation unit, and ensure that the heat storage system operates efficiently within the ideal temperature range.

[0094] The medium flow direction instruction generating unit includes:

[0095] Receiving temperature judgment result: receiving the judgment result of the temperature threshold judgment unit to determine whether the current soil temperature exceeds the set temperature range;

[0096] Soil temperature change trend: According to the soil temperature change trend data output by the temperature data processing unit, the soil temperature change rate is calculated by interpolation algorithm. The formula is: in, is the rate of change of soil temperature over time, T i+1 and T i are the soil temperatures at the current moment and the previous moment respectively, and Δt is the time interval;

[0097] Determine the working mode: According to the set working mode, determine whether it is in heating mode, cooling mode or normal mode;

[0098] The specific mode determination is based on the following:

[0099] When the soil temperature T current Lower than T min And the temperature change rate When it is a negative value, it means that the soil temperature has dropped and the system has entered the heating mode;

[0100] When the soil temperature T current Higher than T max And the temperature change rate When it is a positive value, it means that the soil temperature rises and the system enters the cooling mode;

[0101] Soil temperature T current In [T min , T max ] range, the system maintains normal operation.

[0102] Flow direction instruction generation: Generate instructions for controlling the flow direction of high-temperature heat carrier medium based on temperature judgment results, soil temperature change rate and working mode;

[0103] When the system enters the heating mode and the soil temperature change rate is negative, indicating that the temperature is decreasing, a command is generated to increase the flow rate of the heat medium and preferentially inject it into the low temperature layer to heat the soil;

[0104] When the system enters the cooling mode and the soil temperature change rate is positive, indicating that the temperature is rising, a command is generated to increase the flow rate of the cold medium and preferentially inject it into the high-temperature layer to reduce the temperature;

[0105] If the soil temperature change rate is zero, indicating that the temperature change trend is stable, the instruction maintains the current flow direction and flow rate to ensure that the system temperature remains in the ideal range; the above steps can more accurately adjust the medium flow direction by comprehensively considering the temperature judgment results, soil temperature change rate and working mode; the introduction of soil temperature change rate enables the system to respond to the temperature change trend in real time to avoid excessive heating or cooling due to sudden temperature changes.

[0106] The hot and cold dual supply switching module includes a seasonal mode judgment unit, a pipeline switching control unit and a three-way reversing valve drive unit; wherein:

[0107] Season mode judgment unit: used to judge the current season mode according to the external environment temperature or the time period set by the user, and the judgment result is heating mode or cooling mode;

[0108] Pipeline switching control unit: used to control the three-way reversing valve to switch the heating pipeline or the cooling pipeline according to the judgment result of the season mode judgment unit; if the heating mode is entered, the pipeline switching control unit controls the three-way reversing valve to switch to the heating pipeline to transport the high-temperature heat medium to the area that needs to be heated; if the cooling mode is entered, the three-way reversing valve is controlled to switch to the cooling pipeline to transport the cooling medium to the area that needs to be cooled;

[0109] Three-way reversing valve drive unit: used to receive instructions from the pipeline switching control unit and perform physical switching by electrically or pneumatically driving the three-way reversing valve; the driving method of the three-way reversing valve controls the valve switch through a motor or pneumatic device to ensure that the heat-carrying medium can correctly enter the heating or cooling pipeline; the drive unit provides stable valve switching according to actual needs to ensure that the system can respond to changes in seasonal patterns in a timely manner; through the coordinated work of the above units, the hot and cold dual supply switching module can accurately switch to the heating pipeline or the cooling pipeline according to the seasonal pattern judgment results, ensuring the stable operation of the system in heating mode and cooling mode.

[0110] The ground source heat pump compensation module includes a temperature threshold judgment unit, a ground source heat pump starting unit and a temperature compensation control unit; wherein:

[0111] Temperature threshold judgment unit: used to determine the soil temperature according to the preset soil temperature threshold T threshold Determine the current soil temperature T current Whether it exceeds the threshold; if the current soil temperature T current Greater than T threshold , the judgment unit outputs a start signal to the heat pump drive unit; if the soil temperature does not exceed the threshold, the system maintains the current state without compensation;

[0112] Ground source heat pump start-up unit: used to judge the soil temperature T in the temperature threshold judgment unit current Exceeding the set threshold T threshold , providing a start signal to the ground source heat pump, which transmits the underground temperature to the geothermal heat pump system through the U-shaped buried pipe, and uses the stable temperature environment underground to achieve heat exchange, thereby reducing the temperature; after the ground source heat pump is started, the control system adjusts the operating power in real time according to the change of soil temperature to ensure that the temperature is within the predetermined range;

[0113] Temperature compensation control unit: used to adjust the temperature according to the soil temperature T current With the target temperature T targett The difference between the temperature required to be compensated is calculated, and the excess heat is compensated by adjusting the output power of the ground source heat pump; the calculation formula is: ΔT = T soil -T target , where T target is the ideal soil temperature set for the system, ΔT is the difference between the current soil temperature and the target temperature; the compensation control unit adjusts the heating or cooling power of the ground source heat pump according to the size of ΔT to ensure that the system temperature does not exceed the preset range; through the synergistic effect of the above units, the ground source heat pump compensation module can start the ground source heat pump when the soil temperature exceeds the preset threshold, perform effective temperature compensation, keep the system temperature within the preset range, and ensure that the system operates stably under different soil temperature conditions.

[0114] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0115] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A solar energy cross-seasonal heat storage and dual heat supply system, characterized in that: It includes solar heat collection module, layered heat storage module, soil temperature monitoring module, heat storage control module, hot and cold dual supply switching module and ground source heat pump compensation module; among which: Solar thermal collection module: used to convert solar energy into high-temperature heat-carrying medium; Layered heat storage module: comprising a heat storage body, the heat storage body is used to receive the high-temperature heat medium provided by the solar heat collection module; Soil temperature monitoring module: used to collect soil temperature data at a depth of 10-20 meters underground in the target area in real time; Thermal storage control module: used to generate medium flow instructions according to soil temperature data, control the high-temperature heat-carrying medium to be injected into each temperature layer of the stratified thermal storage module in sequence, and ensure the distribution and storage of heat in the thermal storage body; Hot and cold dual supply switching module: includes a three-way reversing valve and is connected to the output end of the stratified heat storage module, and is used to switch to the heating pipeline or the cooling pipeline according to the seasonal mode to achieve hot and cold dual supply function; Ground source heat pump compensation module: It is linked to the heat storage control module through a U-shaped buried pipe and is used to start the ground source heat pump for temperature compensation when the soil temperature exceeds the preset threshold to keep the system temperature within a predetermined range.

2. The solar energy cross-seasonal heat storage and dual cooling and heating supply system according to claim 1 is characterized in that: The solar heat collection module comprises a solar heat collection panel unit, a heat exchange pipe unit and a heat transfer medium unit; wherein: Solar collector panel unit: including multiple solar collector panels, the surfaces of which are coated with heat-absorbing materials, including chromium alloy, aluminum alloy, copper alloy or graphene, for absorbing solar radiation heat energy and converting solar energy into heat energy; Heat exchange pipe unit: comprising a plurality of heat exchange pipes, the heat exchange pipes are connected to the solar collector plate through a fluid, wherein the fluid is a heat transfer medium selected from water or ethylene glycol solution; Heat transfer medium unit: includes a heat carrier medium, which is a heat transfer liquid selected from water, ethylene glycol solution or polypropylene alcohol solution, and can absorb and transfer heat at a low flow rate.

3. The solar energy cross-seasonal heat storage and dual heat supply system according to claim 1 is characterized in that: The layered heat storage module includes a heat storage unit, a heat exchange channel unit and a thermal short circuit prevention baffle unit; wherein: Thermal storage unit: comprising a plurality of phase change material thermal storage bodies, used for absorbing and storing heat energy when receiving a high-temperature heat carrier medium; the thermal storage body is a porous structure; the melting point range of the phase change material is set between 50-90°C; Heat exchange channel unit: includes multiple heat exchange channels, which are arranged along the inside of the heat storage body and are designed as a serpentine or spiral structure to maximize the contact area with the high-temperature heat medium; the high-temperature heat medium enters the heat exchange channel through the heat exchange pipe, contacts the heat storage body, transfers heat to the phase change material, and causes the phase change material to absorb heat; Anti-thermal short-circuit baffle unit: used to deploy anti-thermal short-circuit baffles between different temperature layers of the heat storage body to prevent heat mixing between different temperature layers and ensure stratified storage of heat; the anti-thermal short-circuit baffle is made of stainless steel or ceramic material.

4. The solar energy cross-seasonal heat storage and dual heat supply system according to claim 1 is characterized in that: The soil temperature monitoring module includes a soil temperature sensing unit, a data acquisition unit and a data transmission unit; wherein: Soil temperature sensing unit: It includes multiple temperature sensors and is buried at different locations at a depth of 10-20 meters underground in the target area to monitor the soil temperature of the target area in real time; the measurement range of each sensor is set to -40 to 100°C; Data acquisition unit: used to receive signals from the soil temperature sensing unit, and amplify, filter and digitize the signals to ensure the accuracy and stability of the data; Data transmission unit: used to transmit the processed soil temperature data to the thermal storage control module. The data transmission adopts wireless communication, and the communication protocol is RS485, Zigbee or LoRa.

5. The solar energy cross-seasonal heat storage and dual heat supply system according to claim 1 is characterized in that: The heat storage control module includes a temperature data processing unit, a temperature threshold judgment unit and a medium flow direction instruction generation unit; wherein: Temperature data processing unit: used to receive real-time soil temperature data from the soil temperature monitoring module, and perform data cleaning and filtering. The processed temperature data is smoothed by an interpolation algorithm to obtain the soil temperature change trend; Temperature threshold judgment unit: used to compare the processed soil temperature data with the preset upper and lower temperature thresholds to determine whether the current soil temperature is within the preset range, and then decide whether the medium flow direction needs to be adjusted; Medium flow direction instruction generating unit: used to generate instructions for controlling the flow direction of high-temperature heat-carrying medium according to the judgment result of the temperature threshold judgment unit, combined with the soil temperature change trend and the set working mode.

6. The solar energy cross-seasonal heat storage and dual cooling and heating supply system according to claim 5 is characterized in that: The temperature data processing unit comprises: Data cleaning: Use statistical methods to identify outliers in temperature data; determine whether a data point is an outlier by calculating the Z-Score value of each data point; if the Z-Score value exceeds the set threshold, the data point is considered an outlier and deleted from the data set; Data filtering: Apply a low-pass filter to the cleaned temperature data for smoothing to remove high-frequency noise; Interpolation algorithm: Apply the interpolation algorithm to the processed data to smooth the data curve and fill in the missing data. The calculation formula is: Among them, S(x) is the interpolation function, x i is the data point, a i ,b i ,c i ,d i is the coefficient of spline interpolation, and n is the total number of interpolation data points; Trend analysis: Use the smoothed data for trend analysis to calculate the long-term trend and short-term fluctuations of soil temperature changes to identify the patterns of soil temperature changes.

7. The solar energy cross-seasonal heat storage and dual heat supply system according to claim 6 is characterized in that: The temperature threshold judgment unit includes: Preset temperature range determination: Set the ideal operating range of soil temperature, including the upper temperature T max and lower limit temperature T min ; Current soil temperature acquisition: Receive real-time soil temperature data from the soil temperature monitoring module, denoted as T current and compare it with the set temperature range; Temperature range comparison: determine the current soil temperature T current Is it within the preset temperature range? If the current soil temperature T current If the current soil temperature is greater than the upper limit temperature, it means that the system has entered an overheating state and cooling measures need to be initiated. current Less than the lower limit temperature T min , it means that the soil temperature is too low and the heating function needs to be enabled.

8. The solar energy cross-seasonal heat storage and dual heat supply system according to claim 7 is characterized in that: The medium flow instruction generating unit comprises: Receiving temperature judgment result: receiving the judgment result of the temperature threshold judgment unit to determine whether the current soil temperature exceeds the set temperature range; Soil temperature change trend: Based on the soil temperature change trend data output by the temperature data processing unit, the soil temperature change rate is calculated through the interpolation algorithm; Determine the working mode: According to the set working mode, determine whether it is in heating mode, cooling mode or normal mode; Flow direction instruction generation: Generate instructions for controlling the flow direction of high-temperature heat carrier medium based on temperature judgment results, soil temperature change rate and working mode; When the system enters the heating mode and the soil temperature change rate is negative, indicating that the temperature is decreasing, a command is generated to increase the flow rate of the heat medium and preferentially inject it into the low temperature layer to heat the soil; When the system enters the cooling mode and the soil temperature change rate is positive, indicating that the temperature is rising, a command is generated to increase the flow rate of the cold medium and preferentially inject it into the high-temperature layer to reduce the temperature; If the soil temperature change rate is zero, indicating that the temperature change trend is stable, the instruction maintains the current flow direction and flow rate.

9. The solar energy cross-seasonal heat storage and dual cooling and heating supply system according to claim 1 is characterized in that: The hot and cold dual supply switching module includes a seasonal mode judgment unit, a pipeline switching control unit and a three-way reversing valve driving unit; wherein: Season mode judgment unit: used to judge the current season mode according to the external environment temperature or the time period set by the user, and the judgment result is heating mode or cooling mode; Pipeline switching control unit: used to control the three-way reversing valve to switch the heating pipeline or the cooling pipeline according to the judgment result of the season mode judgment unit; if the heating mode is entered, the pipeline switching control unit controls the three-way reversing valve to switch to the heating pipeline to transport the high-temperature heat medium to the area that needs to be heated; if the cooling mode is entered, the three-way reversing valve is controlled to switch to the cooling pipeline to transport the cooling medium to the area that needs to be cooled; Three-way reversing valve drive unit: used to receive instructions from the pipeline switching control unit, and perform physical switching by electrically or pneumatically driving the three-way reversing valve to ensure that the heat carrier medium can correctly enter the heating or cooling pipeline.

10. The solar energy cross-seasonal heat storage and dual cooling and heating supply system according to claim 1, characterized in that: The ground source heat pump compensation module includes a temperature threshold judgment unit, a ground source heat pump starting unit and a temperature compensation control unit; wherein: Temperature threshold judgment unit: used to determine the soil temperature according to the preset soil temperature threshold T threshold Determine the current soil temperature T current Whether it exceeds the threshold; if the current soil temperature T current Greater than T threshold , the judgment unit outputs a start signal to the heat pump drive unit; if the soil temperature does not exceed the threshold, the system maintains the current state without compensation; Ground source heat pump start-up unit: used to judge the soil temperature T in the temperature threshold judgment unit current Exceeding the set threshold T threshold , providing a start signal to the ground source heat pump; Temperature compensation control unit: used to adjust the temperature according to the soil temperature T current With the target temperature T targett The difference is calculated, the temperature that needs to be compensated is calculated, and the excess heat is compensated by adjusting the output power of the ground source heat pump.

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