A multi-layered double-root-severing watermelon grafted seedling healing device

Abstract

This utility model belongs to the technical field of agricultural seedling cultivation facilities, specifically relating to a multi-layer double-root-cutting watermelon grafted seedling healing device. It includes a healing chamber, inside which is installed a vertical circulating seedling cultivation device. Several grafted seedling trays are transported on the vertical circulating seedling cultivation device. Temperature and humidity control modules for adjusting the temperature and humidity inside the healing chamber are arranged around the vertical circulating seedling cultivation device. A light environment control module for adjusting the light environment inside the healing chamber is located at the top of the vertical circulating seedling cultivation device. The vertical circulating seedling cultivation device has a conveying motion control module for adjusting its operating speed. It also includes a central control system, which is electrically connected to the temperature and humidity control module, the light environment control module, and the conveying motion control module to achieve spectral environment regulation, control the operating speed of the vertical circulating seedling cultivation device to optimize light exposure, and couple the regulation of temperature and humidity to provide a stable healing microenvironment.

Description

Technical Field

[0001] This utility model belongs to the field of agricultural seedling facility technology, specifically relating to a multi-layer double-root-severing watermelon grafted seedling healing device. Background Technology

[0002] Grafting is an important way to improve disease resistance and ensure uniform and robust seedlings, especially double-root grafted seedlings, which are widely used in high-efficiency seedling systems. Seedlings during the graft healing period are highly sensitive to environmental parameters such as light quality, temperature, and humidity. Light quality, in particular, has a significant impact on plant photomorphogenesis and hormone regulation. Traditional seedling cultivation often uses white light or red-blue light as the dominant light source, neglecting the crucial role of the red to far-red light ratio (R:FR ratio) in regulating graft healing and rooting abilities, as well as seedling quality. Furthermore, current spectral regulation capabilities for the healing environment are weak, making it difficult to meet the varying responses of different watermelon varieties to different light quality ratios. Therefore, precise light control during the healing stage of grafted watermelon seedlings of different varieties is not possible. Existing healing devices are mostly single-layer structures and generally lack automated management, resulting in high labor intensity and low management efficiency, which hinders the industrialization of watermelon seedling cultivation. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a multi-layered double-root-severed watermelon grafted seedling healing device. Through a light environment adjustment module, a conveying motion control module, and a temperature and humidity control module, it can regulate the spectral environment, control the operating speed of the vertical circulating seedling raising device, and optimize light exposure. The coupled regulation of temperature and humidity provides a stable healing microenvironment, thus solving the problems of existing healing devices, which are mostly single-layered structures, generally lack automated management, have high labor intensity and low management efficiency, and thus restrict the industrialization of watermelon seedling raising.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: a multi-layer double-root-severed watermelon grafted seedling healing device, comprising a healing chamber, a vertical circulating seedling raising device disposed inside the healing chamber, a plurality of grafted seedling trays transported on the vertical circulating seedling raising device, a temperature and humidity control module for adjusting the temperature and humidity inside the healing chamber disposed around the vertical circulating seedling raising device, a light environment adjustment module for adjusting the light environment inside the healing chamber disposed on the top of the vertical circulating seedling raising device, a conveying motion control module for adjusting its running speed, and a central control system, the central control system being electrically connected to the temperature and humidity control module, the light environment adjustment module and the conveying motion control module.

[0005] Preferably, the vertical circulating seedling raising device includes a drive sprocket, a driven sprocket, a chain, and a tension wheel disposed inside the healing chamber. A drive motor is connected to the drive sprocket, and the grafting seedling tray is installed on the chain. The drive motor drives the drive sprocket to move the grafting seedling tray along the chain track in a circular motion.

[0006] Preferably, the light environment adjustment module includes multiple sets of lights and a light intensity sensor installed on the top of the healing room. Each set of lights includes a red LED light set, a far-red LED light set, and a white LED light set installed side by side on the top of the healing room.

[0007] Preferably, the temperature and humidity control module includes a misting humidifier, a cooling unit, a heating unit, and a temperature and humidity sensor installed inside the healing room.

[0008] Preferably, the wavelength range of the red LED light group is 620-660nm, and the wavelength range of the far-red LED light group is 700-750nm, and the output light intensity can be adjusted independently.

[0009] Preferably, the grafting seedling tray is provided with a limiting structure for fixing the grafting seedling tray, and the connection end between the grafting seedling tray and the chain is provided with a balancing mechanism to ensure that the grafting seedling tray is always in a horizontal state.

[0010] Preferably, the central control system includes a control platform located on one side of the healing chamber, and the control platform is equipped with a control panel, a spectrum adjustment controller, a temperature and humidity adjustment controller, and a drive motor controller.

[0011] Preferably, the central control system is electrically connected to the temperature and humidity sensor and the light intensity sensor. The central control system has a preset parameter library for the grafting healing stage, which can automatically adjust the output ratio of red light and far-red light and the temperature and humidity ratio according to different healing stages.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: the light environment adjustment module, the conveying motion control module and the temperature and humidity control module can realize the fine control of the spectral environment to adapt to the light signal requirements of different watermelon varieties; the operating speed of the vertical circulating seedling raising device can be controlled and the speed range can be adjusted according to the needs, so as to achieve the optimization of light with as few light environment control modules as possible; the coupled control of temperature and humidity provides a stable healing microenvironment.

[0013] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description or may be learned by practice of the invention. Attached Figure Description

[0014] Figure 1 A schematic diagram of the three-dimensional structure of a multi-layered double-root-severing watermelon grafting seedling healing device. Figure 1 .

[0015] Figure 2 A schematic diagram of the three-dimensional structure of a multi-layered double-root-severing watermelon grafting seedling healing device. Figure 2 .

[0016] Figure 3 This is a cross-sectional view of a multi-layered double-root-severing watermelon grafting seedling healing device.

[0017] Figure 4 A schematic diagram of the three-dimensional structure of a vertical circulating seedling raising device for a multi-layered double-root-severing watermelon grafted seedling healing device. Figure 1 .

[0018] Figure 5 A schematic diagram of the three-dimensional structure of a vertical circulating seedling raising device for a multi-layered double-root-severing watermelon grafted seedling healing device. Figure 2 .

[0019] In the diagram: 1. Healing chamber; 2. Vertical circulating seedling raising device; 21. Drive sprocket; 22. Driven sprocket; 23. Chain; 24. Tensioner; 3. Grafting seedling tray; 4. Temperature and humidity control module; 41. Atomizing humidifier; 42. Cooling unit; 43. Heating unit; 44. Temperature and humidity sensor; 5. Light environment adjustment module; 51. Multiple light groups; 52. Light intensity sensor; 511. Red LED light group; 512. Far-red LED light group; 513. White LED light group; 6. Conveying motion control module; 7. Central control system; 71. Control platform; 72. Control panel; 73. Spectrum adjustment controller; 74. Temperature and humidity control controller; 75. Drive motor controller; 8. Drive motor. Detailed Implementation

[0020] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model. All other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0021] Combination Figure 1 , Figure 2 and Figure 3 As shown, a multi-layer double-root-cutting watermelon grafted seedling healing device includes a healing chamber 1, a vertical circulating seedling raising device 2 installed inside the healing chamber 1, several grafted seedling trays 3 transported on the vertical circulating seedling raising device 2, a temperature and humidity control module 4 for regulating the temperature and humidity inside the healing chamber 1 installed around the vertical circulating seedling raising device 2, a light environment adjustment module 5 for regulating the light environment inside the healing chamber 1 installed on the top of the vertical circulating seedling raising device 2, a conveying motion control module 6 for adjusting its running speed, and a central control system 7, which is electrically connected to the temperature and humidity control module 4, the light environment adjustment module 5, and the conveying motion control module 6.

[0022] This utility model proposes a multi-layer double-root-severing watermelon grafted seedling healing device. The healing chamber 1 provides a relatively independent and closed environment for the healing of the watermelon grafted seedling, and is used to accommodate other functional modules and the grafted seedling.

[0023] The vertical circulating seedling raising device 2 is located inside the healing chamber 1. It has a vertical structure and can operate in a circulating manner. Several grafting seedling trays 3 are transported on it to place watermelon grafting seedlings. The grafting seedlings pass through different environmental areas in sequence during the operation of the device to meet various needs in the healing process.

[0024] Several grafting seedling trays 3 are installed on the vertical circulating seedling raising device 2. Their function is to serve as containers for watermelon grafted seedlings, providing a stable growing position for the seedlings and facilitating the transportation and management of the seedlings on the vertical circulating seedling raising device 2.

[0025] The temperature and humidity control module 4 is installed around the vertical circulating seedling raising device 2, and its main function is to regulate the temperature and humidity inside the healing chamber 1. By controlling the temperature and humidity, suitable environmental conditions are created for the healing of watermelon grafted seedlings.

[0026] The light environment regulation module 5 is located at the top of the vertical circulating seedling device 2 and is used to regulate the light environment inside the healing chamber 1. Light environment factors such as light intensity and light duration can affect the physiological processes of grafted seedlings, such as photosynthesis and hormone synthesis, and thus affect the healing effect.

[0027] The conveying motion control module 6 has the function of adjusting the operating speed of the vertical circulating seedling raising device 2. By controlling the operating speed, the time that the grafted seedling stays in each environmental area can be adjusted, thereby better meeting the needs of different stages in the healing process of the grafted seedling.

[0028] The central control system 7 is electrically connected to the temperature and humidity control module 4, the light environment adjustment module 5, and the conveying motion control module 6. It can receive information from each module and, according to preset programs or manually input instructions, centrally control and coordinate the temperature and humidity control module 4, the light environment adjustment module 5, and the conveying motion control module 6 to achieve precise control of the environmental parameters inside the healing chamber 1 and the operating status of the vertical circulating seedling device 2.

[0029] When the device is in operation, the watermelon grafted seedlings are first placed in the grafted seedling tray 3, and then the grafted seedling tray 3 is placed on the vertical circulating seedling raising device 2. The vertical circulating seedling raising device 2 starts to operate under the regulation of the conveying motion control module 6, and drives the grafted seedling tray 3 to move cyclically at the set speed, so that the grafted seedlings pass through different positions in sequence.

[0030] The temperature and humidity control module 4 monitors the temperature and humidity inside the healing chamber 1 in real time and feeds the data back to the central control system 7. The central control system 7 sends instructions to the temperature and humidity control module 4 according to the preset suitable temperature and humidity range to adjust the temperature and humidity inside the healing chamber 1, creating a good temperature and humidity environment for the grafted seedlings to heal.

[0031] The light environment regulation module 5 also operates under the control of the central control system 7. The central control system 7 adjusts the light environment regulation module 5 according to the light requirements of the grafted seedlings at different stages of healing, changing parameters such as light intensity and duration to meet the needs of photosynthesis and physiological regulation of the grafted seedlings.

[0032] Throughout the process, the central control system 7 continuously receives feedback information from the temperature and humidity control module 4 and the light environment adjustment module 5, and adjusts the control strategy in real time based on this information. At the same time, it precisely controls the operating speed of the vertical circulating seedling raising device 2 through the conveying motion control module 6, ensuring that the watermelon grafted seedlings complete the healing process under suitable temperature, humidity, light environment and reasonable transportation rhythm, thereby improving the healing quality and survival rate of the grafted seedlings.

[0033] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the vertical circulating seedling raising device 2 includes a drive sprocket 21, a driven sprocket 22, a chain 23 and a tension wheel 24 installed inside the healing chamber 1. A drive motor 8 is connected to the drive sprocket 21. The grafting seedling hole tray 3 is installed on the chain 23. The drive motor 8 drives the drive sprocket 21 to move the grafting seedling hole tray 3 in a circular motion along the track of the chain 23.

[0034] Specifically, the drive sprocket 21 is located inside the healing chamber 1. Through meshing with the chain 23, it transmits its rotational motion to the chain 23, driving the entire device to operate. The driven sprocket 22 is also located inside the healing chamber 1, cooperating with the drive sprocket 21. The driven sprocket 22 rotates under the drive of the chain 23, supporting the chain 23 and changing its direction of movement. Together with the drive sprocket 21, it forms the circulation path of the chain 23, enabling the chain 23 to continuously circulate.

[0035] Chain 23 forms a closed loop. Grafting seedling trays 3 are mounted on chain 23 and move with the chain 23. Tensioner 24 adjusts the tension of chain 23. Drive motor 8, connected to drive sprocket 21, is the power source for the entire vertical circulating seedling raising device 2. Drive motor 8 converts electrical energy into mechanical energy, driving drive sprocket 21 to rotate, thus initiating the cyclical movement of the entire device. Grafting seedling trays 3, mounted on chain 23, are used to hold watermelon grafted seedlings. This provides a stable growing environment for the grafted seedlings, and as the chain 23 moves cyclically, the seedlings pass through different areas within the healing chamber 1, receiving suitable temperature, humidity, and light conditions to promote the healing process.

[0036] Combination Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, the light environment adjustment module 5 includes multiple sets of light groups 51 and a light intensity sensor 52 installed at the top inside the healing chamber 1. Each set of light groups 51 includes a red LED light group 511, a far-red LED light group 512 and a white LED light group 513 installed side by side at the top inside the healing chamber 1.

[0037] Specifically, multiple light groups 51 are evenly arranged on the ceiling inside the healing chamber 1 to provide different types of light for the grafted seedlings. Each light group 51 consists of three LED light groups with different functions arranged side by side, with red LED light groups 511 occupying a certain position in each group, mainly emitting red light of a specific wavelength. Red light plays an important role in plant growth and development, such as promoting photosynthesis and influencing physiological processes like flowering and fruiting, and is crucial for the healing and growth of watermelon grafted seedlings.

[0038] The far-red LED light group 512 and the red LED light group 511 are arranged side by side to emit far-red light. There is a certain interaction between far-red light and red light, which can regulate the morphogenesis and photoperiodic response of plants, help watermelon grafted seedlings better adapt to the healing environment, and promote the coordinated development of their physiological functions.

[0039] The white LED light group 513 is also arranged side by side in each light group 51, providing a spectral composition close to natural light. White light contains a variety of wavelengths, which can provide more comprehensive lighting conditions for watermelon grafted seedlings, meet their needs for different wavelengths of light during the healing process, and ensure their normal physiological metabolic activities.

[0040] A light intensity sensor 52 is installed in a suitable location inside the healing chamber 1 (usually in an area that can better reflect the overall light intensity, such as the top or middle) to monitor the light intensity inside the healing chamber 1 in real time. The light intensity sensor 52 can convert the sensed light intensity signal into an electrical signal and transmit it to the central control system 7, so that the central control system 7 can accurately adjust the lamp group 51 according to the preset light intensity parameters.

[0041] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the temperature and humidity control module 4 includes an atomizing humidifier 41, a cooling unit 42, a heating unit 43, and a temperature and humidity sensor 44 installed inside the healing chamber 1.

[0042] Specifically, the atomizing humidifier 41 is installed inside the healing chamber 1. By atomizing water into tiny particles and spraying them into the air, it increases the humidity inside the healing chamber 1. The atomizing humidifier 41 can quickly and evenly increase the humidity to meet the high humidity requirements of the watermelon grafted seedlings during the healing process.

[0043] The cooling unit 42 is installed in a suitable location inside the healing chamber 1 to reduce the temperature inside the healing chamber 1. When the temperature inside the healing chamber 1 is too high, the cooling unit 42 is activated, absorbing heat from the air through the cooling cycle system to lower the indoor temperature, creating a suitable low-temperature environment for the watermelon grafted seedlings and preventing physiological dysfunction caused by high temperatures.

[0044] Heating unit 43 is also installed inside healing chamber 1. When the temperature inside healing chamber 1 is too low, heat is generated through heating elements to raise the indoor temperature. Heating unit 43 can heat up quickly, ensuring a warm healing space for watermelon grafted seedlings even in cold environments, promoting their growth and healing.

[0045] Temperature and humidity sensor 44 is positioned inside the healing chamber 1 to accurately reflect the overall temperature and humidity conditions, and is used to monitor the temperature and humidity inside the healing chamber 1 in real time. Temperature and humidity sensor 44 can convert the sensed temperature and humidity signals into electrical signals and transmit them to the central control system 7, so that the central control system 7 can accurately adjust other components according to preset temperature and humidity parameters.

[0046] Combination Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the wavelength range of the red LED light group 511 is 620-660nm, and the wavelength range of the far-red LED light group 512 is 700-750nm, and the output light intensity can be adjusted independently.

[0047] Specifically, the 511 red LED light assembly consists of multiple red LED beads arranged in a specific pattern, emitting light with a specific wavelength range, concentrated between 620 and 660 nm. This wavelength range of red light plays an important role in plant growth and development, as it can be effectively absorbed by photosynthetic pigments in plant leaves, participating in the light-dependent reactions of photosynthesis, providing energy for plants, and promoting physiological processes such as growth, flowering, and fruiting.

[0048] The 512 far-red LED light assembly is also composed of multiple far-red LED beads arranged in an orderly manner, with an output light wavelength range of 700-750nm. Far-red light and red light have a close interaction in terms of photomorphogenesis and photoperiod regulation in plants, which can affect the morphological and physiological characteristics of plants such as stem elongation, leaf expansion, and flowering time.

[0049] Each of the red LED light group 511 and the far-infrared LED light group 512 is equipped with an independent output light intensity adjustment device, enabling independent and precise control of the output light intensity of each light group.

[0050] Combination Figure 3 , Figure 4 and Figure 5 As shown, the grafting seedling tray 3 is provided with a limiting structure for fixing the grafting seedling tray, and the connection end of the grafting seedling tray 3 and the chain 23 is provided with a balancing mechanism to ensure that the grafting seedling tray 3 is always in a horizontal state.

[0051] Specifically, the grafting seedling tray 3 is a special container for placing grafting seedling trays, providing a stable and suitable supporting space for the grafted seedlings, and facilitating movement and operation in the multi-layer double-root-cut watermelon grafting seedling healing device.

[0052] The limiting structure is set on the grafting seedling tray groove 3, and can be distributed on the edge of the groove or in specific areas inside the groove according to actual design needs, so as to effectively fix the grafting seedling tray. It consists of multiple protruding locking blocks, which are evenly distributed in the grafting seedling tray groove 3 at positions corresponding to the edge of the grafting seedling tray. When the grafting seedling tray is placed, the locking blocks can lock the edge of the grafting seedling tray, preventing it from moving freely in the horizontal direction, thereby firmly fixing grafting seedling trays of different sizes.

[0053] The balancing mechanism is located at the connection end between the grafting seedling tray 3 and the chain 23. The chain 23 is used to move the grafting seedling tray 3 within the device, and the balancing mechanism, located at this connection point, ensures that the grafting seedling tray 3 remains horizontal during the movement of the chain 23.

[0054] Combination Figure 3 , Figure 4 and Figure 5 As shown, the central control system 7 includes a control platform 71 located on one side of the healing chamber 1. The control platform 71 is equipped with a control panel 72, a spectrum adjustment controller 73, a temperature and humidity adjustment controller 74, and a drive motor controller 75.

[0055] Specifically, the central control system 7 is the core control unit of the multi-layer double-root-cut watermelon grafted seedling healing device. The control platform 71 serves as the carrier, integrating multiple functional controllers to achieve precise control of environmental parameters and equipment operation within the healing chamber 1. The control platform 71 is located on one side of the healing chamber 1, facilitating close observation of the situation inside the chamber by operators, and also enabling convenient operation and monitoring of various devices on the control platform 71.

[0056] The control panel 72 is divided into different areas according to function, such as the parameter setting area, mode selection area, and emergency stop area. The parameter setting area is used to set the target values ​​of the environmental parameters required in the healing chamber 1; the mode selection area provides multiple working modes for operators to choose from, such as automatic mode and manual mode; the emergency stop area is equipped with a conspicuous red emergency stop button, which can quickly stop the operation of the device in case of an emergency, ensuring the safety of equipment and personnel.

[0057] The spectral adjustment controller 73 is typically a small rectangular box with operation buttons and indicator lights on its surface. The operation buttons are used to adjust the light intensity of different wavelengths of light, and the indicator lights are used to display the current operating status of the spectral adjustment.

[0058] Similar to the spectral adjustment controller 73, the temperature and humidity control controller 74 is also a small rectangular box with an operating interface and indicator lights. The operating interface allows users to set target values ​​for temperature and humidity, while the indicator lights display the operating status of the temperature and humidity control equipment.

[0059] The drive motor controller 75 is typically a rectangular box with motor control buttons, a speed adjustment knob, and status indicator lights on its surface. The buttons are used to start and stop the motor, the knob is used to adjust the motor speed, and the indicator lights display the motor's operating status.

[0060] Combination Figure 1 and Figure 2As shown, the central control system 7 is electrically connected to the temperature and humidity sensor 44 and the light intensity sensor 52. The central control system 7 has a preset grafting healing stage parameter library, which can automatically adjust the output ratio of red light and far-red light and the temperature and humidity ratio according to different healing stages.

[0061] Specifically, the temperature and humidity sensor 44 continuously monitors the temperature and humidity data in the healing room 1 in real time, and converts this data into digital signals and transmits them to the central control system 7 via an electrical connection.

[0062] The light intensity sensor 52 also measures the light intensity data of red and far-red light in the healing chamber 1 in real time, and sends it to the central control system 7 after internal signal processing. The communication module of the central control system 7 receives this data from the sensor and stores it in memory for subsequent processing and analysis.

[0063] The microprocessor of the central control system 7 determines the current healing stage of the grafted seedling based on a preset time program or by analyzing the growth status of the grafted seedling (e.g., by using image recognition technology to assist in judging the healing stage).

[0064] Then, parameters such as the red light and far-infrared light output ratio range and the temperature and humidity ratio range corresponding to the current healing stage are retrieved from the preset grafting healing stage parameter library.

[0065] The central control system 7 compares the currently measured red and far-infrared light intensities with the preset light intensity ratio range. If the actual light intensity ratio deviates from the preset range, the microprocessor calculates the amount of light intensity change that needs to be adjusted and sends control commands to the lighting adjustment device (such as LED light groups) through the communication module to adjust the current or power of the red and far-infrared LED lights, thereby changing the output ratio of red and far-infrared light to achieve the preset optimal ratio.

[0066] The central control system 7 compares and analyzes the collected current temperature and humidity data with the preset temperature and humidity ratio range. If the temperature or humidity exceeds the preset range, the microprocessor will calculate the amount that needs to be adjusted according to the corresponding control algorithm, and then send control signals to the temperature and humidity regulating equipment (such as heaters, coolers, humidifiers, dehumidifiers, etc.) to adjust the working status of these devices, so that the temperature and humidity in the healing chamber 1 are gradually adjusted to the preset ratio range, providing suitable environmental conditions for the healing of the grafted seedlings.

[0067] Throughout the grafted seedling healing process, the central control system 7 continuously collects temperature, humidity, and light intensity data, and compares and analyzes them in real time with preset parameters. Based on the comparison results, it dynamically adjusts the output ratio of red light to far-red light and the temperature and humidity ratio to ensure that the grafted seedlings are always in the optimal growth environment, thereby improving the healing quality and survival rate. Simultaneously, the central control system 7 also monitors the equipment's operating status in real time. If any equipment malfunction or abnormality is detected, it will promptly issue an alarm signal and take corresponding protective measures to ensure the safe and stable operation of the entire healing device.

[0068] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A multi-layered double-root-severing watermelon grafted seedling healing device, comprising a healing chamber (1), characterized in that, The healing chamber (1) is equipped with a vertical circulating seedling raising device (2). Several grafting seedling trays (3) are transported on the vertical circulating seedling raising device (2). A temperature and humidity control module (4) for adjusting the temperature and humidity inside the healing chamber (1) is set around the vertical circulating seedling raising device (2). A light environment adjustment module (5) for adjusting the light environment inside the healing chamber (1) is set on the top of the vertical circulating seedling raising device (2). The vertical circulating seedling raising device (2) has a conveying motion control module (6) for adjusting its running speed. It also includes a central control system (7). The central control system (7) is electrically connected to the temperature and humidity control module (4), the light environment adjustment module (5), and the conveying motion control module (6).

2. The multi-layer double-root-severing watermelon grafted seedling healing device according to claim 1, characterized in that, The vertical circulating seedling raising device (2) includes a drive sprocket (21), a driven sprocket (22), a chain (23) and a tension wheel (24) set inside the healing chamber (1). A drive motor (8) is connected to the drive sprocket (21). The grafting seedling hole tray (3) is installed on the chain (23). The drive motor (8) drives the drive sprocket (21) to drive the grafting seedling hole tray (3) to move cyclically along the track of the chain (23).

3. A multi-layer double-root-severing watermelon grafted seedling healing device according to any one of claims 1 or 2, characterized in that, The light environment adjustment module (5) includes multiple sets of lamps (51) and a light intensity sensor (52) set on the top of the inside of the healing chamber (1). Each set of lamps (51) includes a red LED lamp (511), a far-red LED lamp (512) and a white LED lamp (513) set side by side on the top of the inside of the healing chamber (1).

4. The multi-layer double-root-severing watermelon grafted seedling healing device according to claim 3, characterized in that, The temperature and humidity control module (4) includes an atomizing humidifier (41), a cooling unit (42), a heating unit (43), and a temperature and humidity sensor (44) installed inside the healing chamber (1).

5. The multi-layer double-root-severing watermelon grafted seedling healing device according to claim 3, characterized in that, The wavelength range of the red LED light group (511) is 620-660nm, and the wavelength range of the far-red LED light group (512) is 700-750nm. Both of them can be independently adjusted in terms of output light intensity.

6. A multi-layer double-root-severing watermelon grafted seedling healing device according to any one of claims 1-5, characterized in that, The grafting seedling tray (3) is provided with a limiting structure for fixing the grafting seedling tray, and the connection end between the grafting seedling tray (3) and the chain (23) is provided with a balancing mechanism to ensure that the grafting seedling tray (3) is always in a horizontal state.

7. The multi-layer double-root-severing watermelon grafted seedling healing device according to claim 6, characterized in that, The central control system (7) includes a control platform (71) located on one side of the healing room (1). The control platform (71) is equipped with a control panel (72), a spectrum adjustment controller (73), a temperature and humidity adjustment controller (74), and a drive motor controller (75).

8. The multi-layer double-root-severing watermelon grafted seedling healing device according to claim 7, characterized in that, The central control system (7) is electrically connected to the temperature and humidity sensor (44) and the light intensity sensor (52). The central control system (7) is equipped with a preset grafting healing stage parameter library, which can automatically adjust the output ratio of red light and far-red light and the temperature and humidity ratio according to different healing stages.

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