Anti-freezing device for planting plants in high and cold environment

Abstract

The invention relates to the technical field of plant planting anti-freezing devices, and discloses a high and cold environment plant planting anti-freezing device which is characterized in that a photovoltaic panel is arranged at the top of the side of a planting pit, a soil temperature sensor is arranged at the corner of the top of the side of the planting pit, and an electric heating wire is arranged in an inner cavity of a combined heating box; heat conduction fins inserted into soil are arranged on the upper side of the inner wall of the combined heating box, the air guide ring communicates with an L-shaped air guide pipe embedded into the soil, and an air inlet fan is fixed to the tail end of the top of the air inlet groove pipe. The root system temperature is monitored in real time through the soil temperature sensor, the controller automatically triggers a heating and ventilation mechanism, extreme low temperature and freeze-thaw cycle are dynamically coped, and the survival rate and preservation rate of nursery stocks are increased; the electric heating wire is matched with the heat-conducting fins to realize uniform heating of soil, and particularly strengthen heat preservation of a deep root system area; dry and warm air is introduced, soil moisture is discharged, hardening is avoided, meanwhile, the soil temperature is increased in an auxiliary mode, and the problems of poor soil breathability and difficult fertility maintenance caused by low temperature are solved.

Description

Technical Field

[0001] This invention relates to the field of plant cultivation antifreeze devices, specifically a plant cultivation antifreeze device for cold environments. Background Technology

[0002] Planting trees in high-altitude, cold environments presents multiple technical challenges, severely hindering the progress of ecological restoration and greening projects. The primary challenge lies in the extreme climatic conditions of low average annual temperature and short frost-free period, making it difficult for trees to complete their full growth cycle; large diurnal temperature differences lead to frequent freeze-thaw cycles, causing mechanical damage and physiological drought to the root system.

[0003] Soil conditions also present significant limitations: prolonged low temperatures lead to weak microbial activity, slow decomposition of organic matter, poor aeration, and difficulties in soil improvement and fertility maintenance.

[0004] Furthermore, traditional frost protection measures have limited effectiveness: conventional methods such as covering and wrapping are insufficient to dynamically cope with sudden extreme low temperatures and snow disasters, and manual maintenance is costly and slow to respond, resulting in consistently low seedling survival and preservation rates. Therefore, we have developed a frost protection device for planting plants in cold-climate environments. Summary of the Invention

[0005] The purpose of this invention is to provide a frost protection device for planting plants in cold environments, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A frost protection device for planting plants in cold environments includes a planting pit for planting plants, a photovoltaic panel is provided on the top side of the planting pit, and a soil temperature sensor is provided at the corner of the top side of the planting pit, with the soil temperature sensor inserted into the soil inside the planting pit. A combined heating box is provided on the bottom side of the planting pit, and an electric heating wire is provided in the inner cavity of the combined heating box; The upper side of the inner wall of the combined heating box is provided with heat-conducting fins that are inserted into the soil. The lower side of the inner wall of the combined heating box is provided with an air guide ring with a vent hole at the bottom. An L-shaped air guide pipe buried in the soil is connected to the air guide ring. The upper end of the combined heating box is provided with an air inlet slot pipe that extends out of the planting pit. An air inlet fan is fixed at the top end of the air inlet slot pipe. The air inlet pipe is connected to the air guide ring through the inner cavity of the combined heating box; The photovoltaic panel is used to power the soil temperature sensor, the electric heating wire, and the intake fan.

[0007] Preferably, the photovoltaic panel is fixed to the top of the planting pit using a bracket, and the photovoltaic panel is tilted at a 45-degree angle to the horizontal ground.

[0008] Preferably, a controller is fixed to the bottom of the photovoltaic panel, and the built-in battery of the controller is electrically connected to the soil temperature sensor, the electric heating wire and the air intake fan respectively.

[0009] Preferably, an mounting plate is provided at the top corner of the planting pit, and the top of the soil temperature sensor is connected to the mounting plate.

[0010] Preferably, the combined heating box includes an outer protective shell disposed on the bottom side of the planting pit and an inner heat-conducting shell sealed and fixed to the inner wall of the outer protective shell; The inner wall of the outer protective shell has a centrally located inner groove, and the inner groove and the inner heat-conducting shell form an inner cavity for installing the electric heating wire.

[0011] Preferably, the heat-conducting fins are fixed to the inner wall of the inner heat-conducting shell at equal intervals, and the length of the heat-conducting fins increases sequentially from top to bottom.

[0012] Preferably, the outer side of the air guide ring is connected to the inner wall of the inner heat-conducting shell by four sets of equally spaced connecting pipes, so that the inner cavity is connected to the air guide ring through the connecting pipes.

[0013] Compared with the prior art, the beneficial effects of the present invention are: the present invention specifically solves the problem of low temperature freezing damage, protects the plant growth cycle, monitors the root temperature in real time through soil temperature sensors, and the controller automatically triggers heating and ventilation mechanisms to dynamically respond to extreme low temperatures and freeze-thaw cycles, reduce root mechanical damage and physiological drought, and improve seedling survival rate and preservation rate.

[0014] This invention improves soil conditions, balancing heating and aeration. The electric heating wire, combined with heat-conducting fins, achieves uniform soil heating, especially enhancing the insulation of deep root areas. It introduces dry, warm air, removes soil moisture, and prevents compaction, while also helping to increase soil temperature and alleviate the problems of poor soil aeration and difficulty in maintaining fertility caused by low temperatures.

[0015] This invention reduces maintenance costs and enables intelligent operation. The photovoltaic panels provide power without the need for an external power source, making it suitable for high-altitude, remote, and power-free environments. The built-in battery stores energy to ensure all-weather operation. No manual supervision is required; the controller automatically adjusts component operation based on temperature data, solving the drawbacks of traditional anti-freezing measures such as delayed response and high labor costs.

[0016] The device is designed to be suitable for cold environments, with strong protection and long service life. Each component is easy to install and can be flexibly adapted to different tree planting needs. It takes into account both frost protection and plant growth requirements, making it highly practical and applicable, and providing reliable technical support for tree planting in cold regions. Attached Figure Description

[0017] Figure 1 This is an exploded structural diagram of the entire invention; Figure 2 This is a schematic diagram of the structure of the photovoltaic panel, soil temperature sensor, and planting pit of the present invention. Figure 3 A schematic diagram of the structure of the air inlet slot and outer protective shell of the present invention; Figure 4 This is a three-dimensional structural diagram of the connection between the inner heat-conducting shell, heat-conducting fins, and air-conducting ring of the present invention. Figure 5 For the present invention Figure 4 A schematic diagram of the three-dimensional structure from another perspective; Figure 6 For the present invention Figure 4 A schematic diagram of the cross-sectional structure; Figure 7 A three-dimensional structural diagram of the overall configuration of the present invention; Figure 8 For the present invention Figure 7 First sectional view of the structure; Figure 9 For the present invention Figure 7 The second sectional view of the structure.

[0018] In the diagram: 1. Planting pit; 2. Photovoltaic panel; 3. Outer protective shell; 4. Air inlet pipe; 5. Controller; 6. Electric heating wire; 7. Inner heat-conducting shell; 8. Bracket; 9. Mounting plate; 10. Soil temperature sensor; 11. Air intake fan; 13. Inner groove; 14. Heat-conducting fins; 15. Air guide ring; 16. L-shaped air guide pipe; 17. Connecting pipe; 18. Ventilation hole. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example: Please see Figures 1-9 The present invention provides a technical solution: A frost protection device for planting plants in cold environments includes a planting pit 1 for planting plants. The planting pit 1 serves as the basic carrier for planting plants. The top side of the pit provides support for the installation of photovoltaic panels 2 and soil temperature sensors 10. The bottom side of the pit provides a fixed space for a combined heating box. The planting pit 1 can reduce the direct invasion of cold air into the plant roots, forming a natural heat insulation barrier. It is suitable for the low temperature environment of cold regions and lays the foundation for the subsequent heating and heat preservation mechanisms.

[0021] A photovoltaic panel 2 is installed on the top side of the planting pit 1. The photovoltaic panel 2 is fixed to the top side of the planting pit 1 by a bracket 8. The photovoltaic panel 2 is tilted at a 45-degree angle to the horizontal ground. The 45-degree tilt angle can maximize the reception of sunlight in high-altitude and cold regions (the solar altitude angle is low in high-altitude and cold regions, and this angle can reduce sunlight reflection and prolong the sunlight reception time), improve the solar energy conversion efficiency. At the same time, the bracket 8 can stably fix the photovoltaic panel 2, resist the strong winds, blizzards and other severe weather in high-altitude and cold regions, prevent the photovoltaic panel 2 from falling off or being damaged, and ensure the stability of power supply.

[0022] A soil temperature sensor 10 is installed at the top corner of the planting pit 1, and an mounting plate 9 is installed at the top corner of the planting pit 1. The top of the soil temperature sensor 10 is connected to the mounting plate 9. The mounting plate 9 can stably fix the soil temperature sensor 10 to prevent the sensor from shifting or falling off due to soil loosening or frost heave. This ensures that the sensor can continuously and accurately collect soil temperature data (especially the temperature around the plant roots), providing accurate basis for the control decision of the controller 5. It also prevents the antifreeze mechanism from being falsely triggered or not triggered in time due to temperature monitoring errors, thus ensuring the antifreeze effect. At the same time, the mounting plate 9 facilitates the installation, maintenance and replacement of the soil temperature sensor 10.

[0023] Soil temperature sensor 10 is inserted into the soil in planting pit 1. A combined heating box is provided on the bottom side of planting pit 1. An electric heating wire 6 is provided in the inner cavity of the combined heating box. A heat-conducting fin 14 inserted into the soil is provided on the upper side of the inner wall of the combined heating box. An air guide ring 15 with a vent hole 18 at the bottom is provided on the lower side of the inner wall of the combined heating box. An L-shaped air guide pipe 16 buried in the soil is connected to the air guide ring 15. An air inlet pipe 4 extending out of planting pit 1 is provided at the upper end of the combined heating box. An air intake fan 11 is fixed at the top end of the air inlet pipe 4. A controller 5 is fixed at the bottom of photovoltaic panel 2. The built-in battery of controller 5 is electrically connected to soil temperature sensor 10, electric heating wire 6 and air intake fan 11 respectively.

[0024] The controller 5 can stabilize the voltage of the electrical energy converted by the photovoltaic panel 2, preventing voltage fluctuations from damaging the electrical components. Simultaneously, the built-in battery can store excess energy, solving the power supply problem in high-altitude and cold regions during nighttime or rainy days when there is no sunlight. This allows the device to operate continuously around the clock without an external power source, reducing operating costs and making it suitable for remote, high-altitude and cold regions without power supply facilities. The controller 5 can centrally control and distribute power to the various electrical components. Based on the monitoring data from the soil temperature sensor 10, it automatically triggers or shuts down the electric heating wire 6 and the air intake fan 11, achieving intelligent control without manual operation. This is suitable for the challenges of manual inspection in high-altitude and cold regions, while also preventing energy waste and improving the energy efficiency of the device.

[0025] The air inlet pipe 4 is connected to the air guide ring 15 through the inner cavity of the combined heating box. The photovoltaic panel 2 is used to power the soil temperature sensor 10, the electric heating wire 6 and the air intake fan 11. The combined heating box includes an outer protective shell 3 set on the bottom side of the planting pit 1 and an inner heat-conducting shell 7 sealed and fixed to the inner wall of the outer protective shell 3. The inner wall of the outer protective shell 3 is provided with an inner groove 13 in the center around its perimeter. The inner groove 13 and the inner heat-conducting shell 7 form an inner cavity for installing the electric heating wire 6. The heat-conducting fins 14 are fixed to the inner wall of the inner heat-conducting shell 7 at equal intervals, and the length of the heat-conducting fins 14 increases from top to bottom.

[0026] (1) Structural design of the combined heating box: The combined heating box includes an outer protective shell 3 and an inner heat-conducting shell 7. The inner groove 13 on the inner wall of the outer protective shell 3 and the inner heat-conducting shell 7 form an inner cavity for installing the electric heating wire 6. The outer protective shell 3 can effectively isolate the soil from compression, moisture and low temperature, and play a protective role for the electric heating wire 6 and the inner heat-conducting shell 7 inside, avoiding damage to the electric heating wire 6 due to soil friction and moisture short circuit, and extending the service life of the components. The inner heat-conducting shell 7 has good thermal conductivity, which can quickly conduct the heat generated by the electric heating wire 6 out, and improve the heating efficiency. The setting of the inner cavity can isolate the electric heating wire 6 from the soil, and at the same time provide space for airflow, realizing the synergistic effect of "heating + ventilation".

[0027] (2) Installation method of electric heating wire 6: The electric heating wire 6 is installed in the inner cavity between the outer protective shell 3 and the inner heat-conducting shell 7. This installation position can make the heat generated by the electric heating wire 6 evenly transferred to the inner heat-conducting shell 7, avoid local overheating and damage to the soil or plant roots, and at the same time prevent the soil from directly contacting the electric heating wire 6, resulting in heat loss, improving heat utilization rate, and adapting to the needs of low soil temperature and high-efficiency heating in cold regions.

[0028] (3) Structure and connection of heat-conducting fins 14: The heat-conducting fins 14 are fixed on the inner wall of the inner heat-conducting shell 7 at equal intervals and inserted into the soil, with the length increasing from top to bottom; the heat-conducting fins 14 can increase the heat conduction area and quickly conduct the heat of the inner heat-conducting shell 7 into the soil, so as to achieve uniform heating of the soil; the equal intervals at top and bottom can ensure that the soil at different heights can obtain sufficient heat, and the length increases from top to bottom, so as to provide more heat to the deep soil (the main distribution area of ​​plant roots), avoid the deep soil freezing and damaging the roots, meet the actual needs of plant growth, and improve the pertinence and effectiveness of frost protection.

[0029] The outer side of the air guide ring 15 is connected to the inner wall of the inner heat-conducting shell 7 by four sets of equally spaced connecting pipes 17, so that the inner cavity is connected to the air guide ring 15 through the connecting pipes 17.

[0030] (1) Connection and structure of air guide ring 15: The air guide ring 15 is set on the lower side of the inner wall of the combined heating box. The outer side is connected to the inner wall of the inner heat conduction shell 7 through four sets of equally spaced connecting pipes 17. The bottom is provided with a vent hole 18 and connected to the L-shaped air guide pipe 16. The four sets of equally spaced connecting pipes 17 can ensure that the air guide ring 15 is fixed firmly, and at the same time, the inner cavity of the combined heating box is smoothly connected to the air guide ring 15, so that the heated air enters the air guide ring 15 evenly. The vent hole 18 at the bottom can allow warm and dry air to directly penetrate into the surrounding soil. The L-shaped air guide pipe 16 is buried in the soil and can transport air to the upper layer of the soil to achieve all-round air permeability and heating of the soil, and avoid local soil moisture accumulation and freezing. The L-shaped structure can prevent the soil from blocking the air guide pipe, ensure smooth airflow, and adapt to the characteristics of frozen soil and compacted soil in high-altitude and cold regions.

[0031] (2) Connection between the air inlet pipe 4 and each component: The upper end of the air inlet pipe 4 extends out of the planting pit 1, the top is fixed with the air inlet fan 11, and the lower end is connected to the inner cavity of the combined heating box; the air inlet pipe 4 extends out of the planting pit 1, which can introduce dry air from the outside, and avoid the circulation of humid air in the planting pit 1, which will cause the soil moisture to rise and the freezing to intensify; the air inlet fan 11 at the top can provide a stable airflow driving force to ensure that the outside air can continuously enter the combined heating box and fully mix with the heat generated by the electric heating wire 6 to form warm and dry air; the connection structure with the inner cavity of the combined heating box can realize the integrated process of "air inlet-heating-air guiding", improve the efficiency of ventilation and heat preservation, and at the same time, the structure of the air inlet pipe 4 can prevent snow and frozen soil from blocking the air inlet, and ensure the normal operation of the ventilation system.

[0032] (3) Driving benefits of intake fan 11: The intake fan 11 is controlled by controller 5 and powered by photovoltaic panel 2. The speed can be dynamically adjusted according to soil temperature. The benefit is that when the soil temperature is too low, the fan runs at high speed to accelerate air circulation and heating efficiency, quickly increase soil temperature and expel moisture. When the soil temperature rises, the fan runs at low speed or stops, saving energy and achieving intelligent adaptation. At the same time, warm and dry air can improve soil permeability, avoid soil compaction, provide sufficient oxygen for plant roots, and take into account both frost protection and plant growth needs.

[0033] The entire device adopts an integrated structure of "photovoltaic power supply + temperature sensing + heating + ventilation". The various structures work together through reasonable mechanical and electrical connections, requiring no external power supply or manual operation. It is suitable for harsh environments in remote, cold, and windy areas without power supply facilities. The structural design is tailored to the needs of plant growth, with a focus on protecting plant roots. Through precise temperature control, uniform heating, and efficient ventilation, it effectively resists soil freezing and avoids damage to plants from excessive heating and moisture accumulation, thus improving the survival rate of plants in cold environments. At the same time, each structure adopts a protective design (such as the outer protective shell 3 and the support 8), extending the service life of the device and reducing maintenance costs, making it highly practical and applicable.

[0034] (1) The invention is a plant antifreeze device for planting in cold environments, which consists of a soil temperature heating system near the plant roots (combined heating box, electric heating wire 6, heat-conducting fins 14, air guide ring 15, L-shaped air guide pipe 16, air inlet slot pipe 4 and air inlet fan 11, etc.), power collection (photovoltaic panel 2), storage system (data storage chip built into controller 5), temperature monitoring system (soil temperature sensor 10) and controller 5; The aim is to intelligently monitor the temperature of the soil where the roots of trees are located and to heat the soil in a timely manner to ensure that the roots of trees are kept above 0°C and reduce the risk of frost damage.

[0035] (2) Electric heating wires 6 are arranged around the lower part of the tree seedling planting pit 1 and connected to the controller 5 through wires, and the controller 5 supplies electric power to the electric heating wires 6.

[0036] (3) The electrical energy required by the electric heating wire 6 is automatically collected by the photovoltaic panel 2 and stored in the micro battery built into the controller 5.

[0037] (4) The length of the photovoltaic panel 2 can be the same as the side length of the planting pit 1, the width is 20cm, and it is installed at a height of 100cm above the ground at the top of the planting pit 1. The photovoltaic panel 2 is fixed with the bracket 8 and the installation angle of the photovoltaic panel 2 is 45°.

[0038] (5) The soil temperature sensor 10 is connected to the controller 5 via a temperature sensing signal line to detect the soil temperature near the roots of the tree plant at all times. The soil temperature sensor 10 is a commercially available product that meets the usage requirements.

[0039] (6) The controller 5 is used to control the storage of solar energy converted into electrical energy by the photovoltaic panel 2, the collection of soil temperature near the roots of the tree plants, and the control of all functions such as the electric heating wire 6 and the air intake fan 11. It can intelligently sense the temperature of the soil near the roots of the tree plants and start or stop the electric heating wire 6 and the air intake fan 11 in a timely manner.

[0040] This anti-freezing device for planting plants in high-altitude and cold environments uses "photovoltaic power supply + temperature sensing + active heating + breathable insulation" as its core logic to achieve anti-freezing protection for plants in high-altitude and cold environments. It requires no external power supply and can adapt to the environmental characteristics of high-altitude and cold regions. The specific working process is as follows: 1. Power Supply System Operation: The energy source of the device relies entirely on the photovoltaic panel 2. The photovoltaic panel 2 is fixed to the top of the planting pit 1 by the bracket 8 and is set at a 45-degree angle to the horizontal ground. This angle can maximize the reception of sunlight in high-altitude and cold regions and improve the photovoltaic energy conversion efficiency. After the photovoltaic panel 2 converts solar energy into electrical energy, it transmits it to the controller 5 fixed at its bottom. The controller 5 has a built-in battery, which stores electrical energy and stabilizes and distributes the electrical energy, providing stable power supply to the soil temperature sensor 10, electric heating wire 6 and air intake fan 11, ensuring that all components of the device operate in coordination and adapting to the use scenario in high-altitude and cold regions where there is no external power supply.

[0041] 2. Temperature Monitoring: The mounting plate 9 at the top corner of the planting pit 1 is used to fix the soil temperature sensor 10, ensuring that the soil temperature sensor 10 can be stably inserted into the soil in the planting pit 1 and ensuring the accuracy of temperature monitoring. The soil temperature sensor 10 collects the soil temperature data around the plant roots in the planting pit 1 in real time and transmits the data to the controller 5 in real time. The controller 5 has a built-in threshold judgment module. When the soil temperature is detected to be lower than the minimum antifreeze temperature (preset threshold) required for plant growth, the heating and ventilation insulation mechanism is automatically triggered. When the soil temperature rises back to the preset safety threshold, the relevant components are automatically shut down, realizing energy-saving and precise antifreeze control and avoiding the impact of excessively high or low temperatures on plant growth.

[0042] 3. Heating and antifreeze operation: The combined heating box, as the core heating component, is located at the bottom side of the planting pit 1. It is composed of an outer protective shell 3 and an inner heat-conducting shell 7, which are sealed and fixed. The inner wall of the outer protective shell 3 has an inner groove 13 in the center around the perimeter. The inner cavity formed between the inner groove 13 and the inner heat-conducting shell 7 is used to install the electric heating wire 6. This structure can effectively protect the electric heating wire 6 and prevent it from being damaged by soil compression or moisture. It is suitable for the soil environment of high-altitude and cold regions with frozen soil and high humidity. When the controller 5 triggers the heating mechanism, the electric heating wire 6 is energized and generates heat. The heat is quickly transferred to the inner heat-conducting shell 7. The heat-conducting fins 14 on the upper side of the inner wall of the inner heat-conducting shell 7 are inserted into the soil, which can quickly and evenly conduct heat to all parts of the soil in the planting pit 1. The heat-conducting fins 14 are evenly distributed vertically and their length increases from top to bottom, which can adapt to the antifreeze needs of different depths of plant roots, ensuring that the deep soil (the main distribution area of ​​the root system) receives more heat and avoids root frost damage.

[0043] 4. Coordinated operation of ventilation and heat preservation: Simultaneously with electric heating, the controller 5 activates the intake fan 11. The intake fan 11 is fixed to the top end of the intake pipe 4, which extends beyond the planting pit 1, allowing the introduction of dry external air and preventing damp air from entering the soil in cold regions, thus avoiding exacerbating frost damage. Driven by the intake fan 11, outside air enters the inner cavity of the combined heating box through the intake pipe 4, where it comes into full contact with the heat generated by the electric heating wire 6, forming warm and dry air. This warm and dry air then passes through four equally spaced groups of air guide rings 15 on the outside. The connecting pipe 17 enters the air guide ring 15. The bottom of the air guide ring 15 is provided with a vent hole 18 and is connected to an L-shaped air guide pipe 16 buried in the soil. This can evenly deliver warm and dry air to all areas of the soil, which helps to increase the soil temperature and remove moisture from the soil, reducing the probability of soil freezing and preventing soil compaction. This provides a warm, dry, and breathable growing environment for plant roots. The connection structure between the air inlet pipe 4 and the inner cavity of the combined heating box and the air guide ring 15 ensures smooth airflow without any dead corners, improving heat preservation and ventilation efficiency.

[0044] 5. System closed-loop control: The controller 5 receives monitoring data from the soil temperature sensor 10 throughout the process, dynamically adjusts the heating power of the electric heating wire 6 and the speed of the air intake fan 11, and realizes the closed-loop operation of "temperature monitoring - trigger control - heating and ventilation - temperature recovery - stop working". This ensures the antifreeze effect and saves energy to the maximum extent, which is suitable for the characteristics of abundant solar energy resources but limited energy storage in high-altitude and cold regions.

[0045] Specifically, when using it: First, according to the proposed planting location of the tree, dig pits manually to form planting pit 1.

[0046] Second, a 30cm high outer protective shell 3 is set on the four sides of the bottom of the planting pit 1. The heating wire 6 is fixed in the inner groove 13. Then, the inner heat-conducting shell 7 is sealed and fixed in the inner wall of the outer protective shell 3. A soil temperature sensor 10 is installed at the bottom of the planting pit 1 so that both the soil temperature sensor 10 and the heating wire 6 are connected to the controller 5.

[0047] Third, a support frame 8 is installed on the top of the side wall of planting pit 1, with the portion of the support frame 8 above ground being 1m in length. A photovoltaic panel 2 is installed on the top of the support frame 8, and the photovoltaic panel 2 is connected to the battery in the controller 5 via a wired connection. The photovoltaic panel 2 collects solar energy during the day and generates electricity through photovoltaic power, which is then stored in the battery in the controller 5.

[0048] Fourth, plant tree seedlings in the planting pit 1 for trees and backfill with local soil.

[0049] Fifth, the controller 5 obtains the soil temperature in the root zone in real time through the soil temperature sensor 10. When the temperature approaches 0℃, the controller 5 automatically activates the heating wire 6, and promptly supplies the electrical energy stored in the battery of the controller 5 to the heating wire 6 to heat the soil near the roots of the sapling. When the temperature of the soil near the roots of the sapling exceeds 5℃, the controller 5 automatically cuts off the power supply to the heating wire 6.

[0050] In summary, this invention, through refined and dynamic environmental intervention, can significantly improve the survival rate and growth quality of trees planted in high-altitude and cold regions.

[0051] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A frost protection device for planting plants in cold environments, comprising planting pits for planting plants, characterized in that: A photovoltaic panel is installed on the top side of the planting pit, and a soil temperature sensor is installed at the corner of the top side of the planting pit. The soil temperature sensor is inserted into the soil inside the planting pit. A combined heating box is provided on the bottom side of the planting pit, and an electric heating wire is provided in the inner cavity of the combined heating box; The upper side of the inner wall of the combined heating box is provided with heat-conducting fins that are inserted into the soil. The lower side of the inner wall of the combined heating box is provided with an air guide ring with a vent hole at the bottom. An L-shaped air guide pipe buried in the soil is connected to the air guide ring. The upper end of the combined heating box is provided with an air inlet slot pipe that extends out of the planting pit. An air inlet fan is fixed at the top end of the air inlet slot pipe. The air inlet pipe is connected to the air guide ring through the inner cavity of the combined heating box; The photovoltaic panel is used to power the soil temperature sensor, the electric heating wire, and the intake fan.

2. The antifreeze device for planting plants in cold environments according to claim 1, characterized in that: The photovoltaic panel is fixed to the top of the planting pit using a bracket, and the photovoltaic panel is tilted at a 45-degree angle to the horizontal ground.

3. The antifreeze device for planting plants in cold environments according to claim 1, characterized in that: A controller is fixed to the bottom of the photovoltaic panel, and the built-in battery of the controller is electrically connected to the soil temperature sensor, the electric heating wire and the air intake fan.

4. The antifreeze device for planting plants in cold environments according to claim 1, characterized in that: An installation plate is provided at the top corner of the planting pit, and the top of the soil temperature sensor is connected to the installation plate.

5. The antifreeze device for planting plants in cold environments according to claim 1, characterized in that: The combined heating box includes an outer protective shell disposed on the bottom side of the planting pit and an inner heat-conducting shell sealed and fixed to the inner wall of the outer protective shell; The inner wall of the outer protective shell has a centrally located inner groove, and the inner groove and the inner heat-conducting shell form an inner cavity for installing the electric heating wire.

6. The antifreeze device for planting plants in cold environments according to claim 5, characterized in that: The heat-conducting fins are fixed to the inner wall of the inner heat-conducting shell at equal intervals, and the length of the heat-conducting fins increases sequentially from top to bottom.

7. The antifreeze device for planting plants in cold environments according to claim 5, characterized in that: The outer side of the air guide ring is connected to the inner wall of the inner heat-conducting shell by four sets of equally spaced connecting pipes, so that the inner cavity is connected to the air guide ring through the connecting pipes.

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