A substrate temperature detection device with temperature difference control function for soilless cultivation

Abstract

The present invention discloses a substrate temperature detection device with a temperature difference control function for soilless cultivation, which relates to the technical field of temperature detection. The device comprises a main body, a front cover, a steering wheel, a pair of driving wheels, a cleaning mechanism, a filtering mechanism and a detection and temperature adjustment mechanism. The front cover is connected to the main body, the pair of driving wheels are mounted on both sides of the main body, the steering wheel is mounted on the bottom of the main body away from the front cover, the cleaning mechanism is arranged in the front cover, a pressurized cabin is provided on the upper part of the main body, a traction cabin is provided on the lower part of the main body, the filtering mechanism is arranged in the pressurized cabin and the traction cabin, the detection and temperature adjustment mechanism is mounted on the top of the main body, the cleaning mechanism cleans a substrate pool, the filtering mechanism filters and cleans the substrate, the detection and temperature adjustment mechanism detects the temperature of the substrate and adjusts the temperature of the substrate according to the detection result.

Description

Technical Field

[0001] The present invention relates to the technical field of temperature detection, in particular to a substrate temperature detection device for soilless cultivation with a temperature difference control function. Background Art

[0002] Soilless cultivation refers to a cultivation method that uses water, peat, leaf mold, vermiculite and other media as the substrate for plant roots, allowing the plant roots to directly contact the nutrient solution. Soilless cultivation technology is mainly used in places with suitable light and temperature but no soil, such as deserts, beaches, and deserted islands. As long as there is a certain amount of fresh water supply, soilless cultivation can be carried out. Soilless cultivation is divided into hydroponics, mist cultivation and substrate cultivation according to the different cultivation media. Among them, the most commonly used, easiest to manage and most cost-effective soilless cultivation method is hydroponics. Using water as the substrate means that the plant roots are in direct contact with the nutrient solution. The nutrient solution composition is easy to control and can be adjusted at any time. However, this method will cause hypoxia, causing plant roots to fall off. The nutrients in the substrate and the roots that fall off due to microbial fermentation make the water turbid. When the sunshine time is long, the water temperature rises, which is not good for plants and may even cause plant death. Therefore, a sensor device that adjusts the substrate temperature is needed to manage soilless cultivation. Summary of the Invention

[0003] The purpose of the present invention is to provide a substrate temperature monitoring device with a temperature difference control function for soilless cultivation, so as to solve the problems raised in the prior art.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solution: a substrate temperature detection device with a temperature difference control function for soilless cultivation, comprising a main body, a front cover, a steering wheel, a pair of driving wheels, a cleaning mechanism, a filtering mechanism and a detection and temperature adjustment mechanism, the front cover being connected to the main body, the pair of driving wheels being mounted on both sides of the main body, the steering wheel being mounted on the bottom of the main body away from the front cover, the cleaning mechanism being arranged in the front cover, the upper part of the main body being provided with a pressurized cabin, the lower part of the main body being provided with a traction cabin, the filtering mechanism being arranged in the pressurized cabin and the traction cabin, the detection and temperature adjustment mechanism being mounted on the top of the main body, the operator placing the detection device into the substrate, the cleaning mechanism cleaning the substrate pool, the filtering mechanism filtering and cleaning the substrate, the detection and temperature adjustment mechanism detecting the temperature of the substrate and adjusting the temperature of the substrate according to the detection result, the pair of driving wheels driving the main body to move, and the steering wheel causing the main body to change direction, thereby achieving comprehensive cleaning of the substrate pool.

[0005] Furthermore, the cleaning mechanism includes a double-rotating brush roller and a pair of side brush rollers, a pair of side support plates are symmetrically arranged on both sides of the front cover, each side support plate is provided with a motor compartment, a first motor is provided in the motor compartment, a pair of side brush rollers are respectively connected to the first motor, and a driving bevel gear is provided on the side of each side brush roller away from the first motor. The two first motors rotate in opposite directions, and the first motor drives the side brush rollers to rotate, and the side brush rollers clean the side walls of the matrix pool, and the two driving bevel gears respectively drive the two driven bevel gears to rotate, and the two driven bevel gears have the same direction of rotation, and the core shaft is driven to rotate.

[0006] Furthermore, a pair of side support plates are rotatably mounted with a central shaft, both ends of the central shaft are mounted with a driven bevel gear, the driven bevel gear is meshed with the driving bevel gear, a sliding key is provided on the central shaft, and the double-rotation brush roller is slidably sleeved on the central shaft through the sliding key, and a side adapter is rotatably mounted on one side of the double-rotation brush roller, and the central shaft drives the double-rotation brush roller to rotate, and the double-rotation brush roller cleans the bottom of the matrix pool, and the bristles on both sides of the double-rotation brush roller are spirally arranged and rotate in opposite directions, so the impurities brushed off will be concentrated in the middle under the influence of the spiral bristles and flow toward the traction cabin.

[0007] Furthermore, a slip ring is connected to the side adapter, and a cylindrical pin is eccentrically provided on the active bevel gear near the side of the slip ring. The cylindrical pin is slidably sleeved in the slip ring, and the side adapter and the double-rotation brush roller rotate relative to each other, and cannot generate axial relative movement. The active bevel gear drives the cylindrical pin to move while rotating, and the cylindrical pin drives the slip ring to move. The slip ring and the side adapter move back and forth along the axial direction of the double-rotation brush roller together, so that the double-rotation brush roller is pulled by the side adapter while rotating itself, achieving the effect of repeatedly moving while rotating, and the cleaning effect of the bristles on the substrate pool is improved, so that the algae and rot roots in the substrate pool are cleaned, and the factors causing the water temperature to rise are reduced.

[0008] Furthermore, the filtering mechanism includes a filter cloth, several tensioning rollers and a scraper. The filter cloth passes through the pressurized cabin and the traction cabin. Several tensioning rollers are rotatably installed in the pressurized cabin and the traction cabin. Several tensioning rollers tension the filter cloth. A second motor is provided on one side of a tensioning roller. The second motor is provided in the main body. The scraper is installed in the pressurized cabin. The scraper contacts the filter cloth. The second motor drives the tensioning roller to rotate. The tensioning roller drives the filter cloth to move. The impurities sent into the traction cabin by the cleaning mechanism are taken away from the matrix along with the moving filter cloth.

[0009] Furthermore, a through groove is provided at the upper end of the main body, which is connected to the pressurized cabin, and a sealing cover is provided at the through groove. A booster pump (not shown) is installed inside the main body, and a water level sensor is provided at the junction of the pressurized cabin and the traction cabin. The water level sensor and the booster pump are connected to a control system through a circuit. The air suction end of the booster pump is communicated with the outside of the main body, and the air pump end of the booster pump is communicated with the inside of the pressurized cabin. Since the device is immersed in the matrix, the booster pump presses air into the pressurized cabin, so that the water in the pressurized cabin is discharged downward. Through detection by the water level sensor, the matrix is controlled to be able to immerse the pumping jacket without overflowing into the pressurized cabin. After the filter cloth removes impurities from the matrix, the impurities adhere to the filter cloth, and the scraper scrapes off the impurities on the filter cloth, thereby cleaning the surface of the filter cloth and enhancing the circulating filtration performance of the filter cloth. After each use of the device, the operator opens the sealing cover to remove the impurities accumulated in the pressurized cabin.

[0010] Furthermore, the detection and temperature adjustment mechanism includes a water pumping jacket, a pair of shaft-shaped gears and a pair of temperature control pipes. The water pumping jacket is arranged in the traction cabin, the opening of the water pumping jacket is in contact with the filter cloth, the pair of shaft-shaped gears are rotatably installed in the traction cabin, the pair of shaft-shaped gears are located in the water pumping jacket, the pair of shaft-shaped gears are meshed with each other, and the sides of the two shaft-shaped gears away from each other are in sealing contact with the water pumping jacket. A third motor is installed at one end of an shaft-shaped gear, and the third motor is arranged in the main body. The third motor drives the shaft-shaped gear to rotate, and the two shaft-shaped gears are meshed with each other to rotate, sucking the matrix backward from the water pumping jacket. The sucked matrix has been filtered by the filter cloth, and the shaft-shaped gears send the matrix into the water supply channel, so that the matrix enters the temperature control pipe through the connecting pipe.

[0011] Furthermore, water supply channels are provided on both sides of the main body corresponding to the water pumping jacket, and each of the water supply channels is connected to the temperature control pipe by a connecting pipe. Several temperature conducting cylinders are evenly distributed laterally inside each temperature control pipe, and each temperature conducting cylinder is rotatably connected to the temperature control pipe. A small gear is provided on one side of each temperature conducting cylinder, and an electric push rod and a rack are also provided inside the temperature control pipe. The rack is connected to the piston rod of the electric push rod, and the rack contacts each small gear. The thermal insulation tile, the cooling end temperature conducting fins and the heating end temperature conducting fins all occupy one-third of the outer contour of the temperature conducting cylinder. Since the contour of each temperature conducting cylinder exposed inside the water supply channel is one-third, the rack is moved by pulling the electric push rod, and the rack drives all the small gears to rotate, and the small gear drives the temperature conducting cylinder to rotate, which can control the thermal insulation tile, the temperature conducting cylinder in contact with the cooling end temperature conducting fins, and the temperature conducting cylinder in contact with the heating end temperature conducting fins to contact with the substrate in turn.

[0012] Furthermore, one-third of the outer contour of each of the temperature conducting cylinders is provided with thermal insulation tiles, and a semiconductor refrigeration plate is provided inside each temperature conducting cylinder. The cooling end and the heating end of the semiconductor refrigeration plate are in contact with the inner wall of the temperature conducting cylinder through the temperature conducting fins. The thermal insulation tiles do not play a role in heating and cooling when in contact with the substrate. The temperature conducting cylinder in contact with the temperature conducting fins at the cooling end plays a cooling role when in contact with the substrate, and plays a heating role when in contact with the temperature conducting fins at the heating end. The temperature of the substrate is monitored by a temperature sensor, and then the control system is used to control the temperature conducting cylinder to rotate to different angles, so as to realize cooling and heating regulation of the substrate. The temperature-regulated substrate flows back to the substrate pool from the tail end of the temperature control pipe.

[0013] Furthermore, a temperature sensor is provided on the main body, and the temperature sensor and the semiconductor refrigeration plate are connected to the control system circuit.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The active bevel gear drives the cylindrical pin to move while rotating, and the cylindrical pin drives the slip ring to move. The slip ring and the side adapter move back and forth along the axial direction of the double-rotation brush roller, so that the double-rotation brush roller is pulled by the side adapter while rotating itself, achieving the effect of repeatedly moving while rotating. The cleaning effect of the bristles on the substrate pool is improved, so that the algae and rot roots in the substrate pool are cleaned, and the factors causing the increase in water temperature are reduced.

[0016] 2. After the impurities are taken away from the matrix by the filter cloth, the impurities adhere to the filter cloth. The scraper scrapes the impurities off the filter cloth, which cleans the surface of the filter cloth and enhances the circulating filtration performance of the filter cloth.

[0017] 3. The insulation tile does not play a role in heating or cooling when in contact with the substrate. The heat conducting tube in contact with the heat conducting fins at the cooling end plays a cooling role when in contact with the substrate. The heat conducting tube in contact with the heat conducting fins at the heating end plays a heating role when in contact with the substrate. The substrate temperature is detected by the temperature sensor, and the control system is used to control the heat conducting tube to rotate to different angles to achieve cooling and heating adjustments of the substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The overall appearance structure of the present invention is shown as follows Figure 1 ;

[0019] Figure 2 The overall appearance structure of the present invention is shown in FIG. Figure 2 ;

[0020] Figure 3 It is a structural schematic diagram of the front cover portion of the present invention;

[0021] Figure 4This is a schematic structural diagram of the dual-rotation brush roller portion of the present invention;

[0022] Figure 5 It is a structural schematic diagram of the water supply channel of the present invention;

[0023] Figure 6 It is a schematic diagram of the structure inside the main body of the present invention;

[0024] Figure 7 This is a schematic diagram of the internal structure of the temperature-controlled tube of the present invention;

[0025] Figure 8 Schematic diagram of the internal structure of the temperature conducting cylinder of the present invention.

[0026] In the figure: 1. Main body; 2. Front cover; 3. Side support plate; 4. Steering wheel; 5. Drive wheel; 6. Bi-rotation brush roller; 7. Mandrel; 8. Slide key; 9. Side adapter; 10. Slip ring; 11. Cylindrical pin; 12. Driven bevel gear; 13. Driving bevel gear; 14. Side brush roller; 15. Filter cloth; 16. Pumping jacket; 17. Shaft gear; 18. Pressurization cabin; 19. Traction cabin; 20. Water supply channel; 21. Connecting pipe; 22. Temperature control pipe; 23. Electric push rod; 24. Rack; 25. Pinion; 26. Temperature conduction cylinder; 27. Insulation tile; 28. Semiconductor refrigeration plate; 29. Temperature conduction fin; 30. Sealing cover; 31. Scraper; 32. Tensioning roller. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] Example: Figures 1-8As shown, the present invention provides a technical solution, a substrate temperature detection device with a temperature difference control function for soilless cultivation, comprising a main body 1, a front cover 2, a steering wheel 4, a pair of driving wheels 5, a cleaning mechanism, a filtering mechanism and a detection and temperature adjustment mechanism. The front cover 2 is connected to the main body 1, a pair of driving wheels 5 are installed on both sides of the main body 1, and the steering wheel 4 is installed at the bottom of the main body 1 away from the front cover 2. The cleaning mechanism is arranged in the front cover 2, a pressurized cabin 18 is opened at the upper part of the main body 1, and a traction cabin 19 is opened at the lower part of the main body 1. The filtering mechanism is arranged in the pressurized cabin 18 and the traction cabin 19, and the detection and temperature adjustment mechanism is installed on the top of the main body 1. The operator puts the detection device into the substrate, the cleaning mechanism cleans the substrate pool, the filtering mechanism filters and cleans the substrate, the detection and temperature adjustment mechanism detects the temperature of the substrate, and adjusts the temperature of the substrate according to the detection result. The pair of driving wheels 5 drives the main body 1 to move, and the steering wheel 4 causes the main body 1 to change direction to achieve comprehensive cleaning of the substrate pool.

[0029] The cleaning mechanism includes a double-rotation brush roller 6 and a pair of side brush rollers 14. A pair of side support plates 3 are symmetrically arranged on both sides of the front cover 2. Each side support plate 3 is provided with a motor cabin, and a first motor is provided in the motor cabin. A pair of side brush rollers 14 are respectively connected to the first motor, and a driving bevel gear 13 is provided on the side of each side brush roller 14 away from the first motor. A pair of side support plates 3 are rotatably installed with a central shaft 7, and a driven bevel gear 12 is installed at both ends of the central shaft 7. The driven bevel gear 12 is meshed with the driving bevel gear 13, and a slide key 8 is provided on the central shaft 7. The double-rotation brush roller 6 is slidably sleeved on the central shaft 7 through the slide key 8. A side adapter 9 is rotatably installed on one side of the double-rotation brush roller 6, and a slip ring 10 is connected to the side adapter 9. A cylindrical pin 11 is eccentrically provided on the driving bevel gear 13 close to the side of the slip ring 10, and the cylindrical pin 11 is slidably sleeved in the slip ring 10.

[0030] The two first motors rotate in opposite directions, and the first motor drives the side brush roller 14 to rotate. The side brush roller 14 cleans the side wall of the matrix pool. The two active bevel gears 13 respectively drive the two driven bevel gears 12 to rotate. The two driven bevel gears 12 have the same direction of rotation. The spindle 7 is driven to rotate, and the spindle 7 drives the double-rotation brush roller 6 to rotate. The double-rotation brush roller 6 cleans the bottom of the matrix pool. The bristles on both sides of the double-rotation brush roller 6 are spirally arranged and rotate in opposite directions. Therefore, the impurities brushed off will be concentrated in the middle under the influence of the spiral bristles and toward the direction of the traction cabin 19 Flow, the side adapter 9 and the double-rotation brush roller 6 rotate relative to each other, and no axial relative movement can be generated. The active bevel gear 13 drives the cylindrical pin 11 to move while rotating, and the cylindrical pin 11 drives the slip ring 10 to move. The slip ring 10 and the side adapter 9 move back and forth along the axial direction of the double-rotation brush roller 6, so that the double-rotation brush roller 6 is pulled by the side adapter 9 while rotating itself, achieving the effect of repeatedly moving while rotating, and the cleaning effect of the bristles on the substrate pool is improved, so that the algae and rot roots in the substrate pool are cleaned, and the factors causing the increase in water temperature are reduced.

[0031] The filtering mechanism includes a filter cloth 15, several tensioning rollers 32 and a scraper 31. The filter cloth 15 passes through the pressurized cabin 18 and the traction cabin 19. Several tensioning rollers 32 are rotatably installed in the pressurized cabin 18 and the traction cabin 19. Several tensioning rollers 32 tension the filter cloth 15. A second motor is provided on one side of a tensioning roller 32. The second motor is provided in the main body 1. The scraper 31 is installed in the pressurized cabin 18. The scraper 31 contacts the filter cloth 15. A through groove is provided at the upper end of the main body 1. The through groove is connected to the pressurized cabin 18. A sealing cover 30 is provided at the through groove. A booster pump (not shown in the figure) is installed inside the main body 1. A water level sensor is provided at the junction of the pressurized cabin 18 and the traction cabin 19. The water level sensor and the booster pump are connected to the control system through a circuit. The suction end of the booster pump is connected to the outside of the main body 1 The pump air end of the booster pump is connected to the inside of the booster cabin 18, and the second motor drives the tensioning roller 32 to rotate, and the tensioning roller 32 drives the filter cloth 15 to move. The impurities sent into the traction cabin 19 by the cleaning mechanism are taken away from the substrate along with the moving filter cloth 15. Since the device is immersed in the substrate, the booster pump presses air into the booster cabin 18, so that the water in the booster cabin 18 is discharged downward. Through the detection of the water level sensor, the substrate is controlled to be able to immerse the pumping jacket 16 without overflowing into the booster cabin 18. After the filter cloth 15 takes the impurities away from the substrate, the impurities adhere to the filter cloth 15, and the scraper 31 scrapes the impurities on the filter cloth 15, thereby cleaning the surface of the filter cloth 15 and enhancing the circulation filtration performance of the filter cloth 15. After each use of the device, the operator opens the sealing cover 30 to remove the impurities accumulated in the booster cabin 18.

[0032] The detection and temperature adjustment mechanism includes a water pumping jacket 16, a pair of shaft-shaped gears 17 and a pair of temperature control pipes 22. The water pumping jacket 16 is arranged in the traction cabin 19, and the opening of the water pumping jacket 16 contacts the filter cloth 15. A pair of shaft-shaped gears 17 are rotatably installed in the traction cabin 19. A pair of shaft-shaped gears 17 are located in the water pumping jacket 16. The pair of shaft-shaped gears 17 are engaged with each other. The sides of the two shaft-shaped gears 17 away from each other are in sealing contact with the water pumping jacket 16. A third motor is installed at one end of one shaft-shaped gear 17. The third motor is arranged in the main body 1. The third motor drives the shaft-shaped gear 17 to rotate. The two shaft-shaped gears 17 are engaged and rotated with each other to suck the matrix backward from the water pumping jacket 16. The sucked matrix has been filtered by the filter cloth 15. The shaft-shaped gear 17 sends the matrix into the water supply channel 20, so that the matrix enters the temperature control pipe 22 through the connecting pipe 21.

[0033] Water supply channels 20 are provided on both sides of the main body 1 corresponding to the water pumping jacket 16. Each water supply channel 20 is connected to the temperature control pipe 22 through a connecting pipe 21. Several temperature conducting cylinders 26 are evenly distributed laterally inside each temperature control pipe 22. Each temperature conducting cylinder 26 is rotatably connected to the temperature control pipe 22. A pinion 25 is provided on one side of each temperature conducting cylinder 26. An electric push rod 23 and a rack 24 are also provided inside the temperature control pipe 22. The rack 24 is connected to the piston rod of the electric push rod 23, and the rack 24 contacts each pinion 25. An insulation tile 27 is provided on one-third of the outer contour of each temperature conducting cylinder 26. A semiconductor refrigeration plate 28 is provided inside each temperature conducting cylinder 26. The cooling end and the heating end of the semiconductor refrigeration plate 28 are in contact with the inner wall of the temperature conducting cylinder 26 through the temperature conducting fins 29. A temperature sensor is provided on the main body 1, and the temperature sensor and the semiconductor refrigeration plate 28 are connected to the control system circuit.

[0034] The insulation tile 27, the cooling end heat conducting fin 29 and the heating end heat conducting fin 29 all occupy one-third of the outer contour of the heat conducting cylinder 26. Since the contour of each heat conducting cylinder 26 exposed inside the water supply channel 20 is one-third, the electric push rod 23 pulls the rack 24 to move, the rack 24 drives all the pinions 25 to rotate, and the pinions 25 drive the heat conducting cylinder 26 to rotate, which can sequentially control the insulation tile 27, the heat conducting cylinder 26 in contact with the cooling end heat conducting fin 29 and the heat conducting cylinder 26 in contact with the heating end heat conducting fin 29. When in contact with the substrate, the thermal insulation tile 27 does not play a role in heating or cooling the substrate. When the thermal conductive cylinder 26 in contact with the cooling end thermal conductive fins 29 contacts the substrate, it plays a cooling role. When the thermal conductive cylinder 26 in contact with the heating end thermal conductive fins 29 contacts the substrate, it plays a heating role. The temperature of the substrate is detected by the temperature sensor, and then the control system is used to control the thermal conductive cylinder 26 to rotate to different angles, so as to achieve cooling and heating adjustment of the substrate. The substrate after temperature adjustment flows back to the substrate pool from the tail end of the temperature control pipe 22.

[0035] The working principle of the present invention is as follows: the operator places the detection device into the substrate, the cleaning mechanism cleans the substrate pool, the filtering mechanism filters and cleans the substrate, the detection and temperature adjustment mechanism detects the temperature of the substrate and adjusts the temperature of the substrate according to the detection results, a pair of driving wheels 5 drives the main body 1 to move, and the steering wheel 4 makes the main body 1 change direction to achieve comprehensive cleaning of the substrate pool.

[0036] The two first motors rotate in opposite directions, and the first motor drives the side brush roller 14 to rotate. The side brush roller 14 cleans the side wall of the matrix pool. The two active bevel gears 13 respectively drive the two driven bevel gears 12 to rotate. The two driven bevel gears 12 have the same direction of rotation. The spindle 7 is driven to rotate, and the spindle 7 drives the double-rotation brush roller 6 to rotate. The double-rotation brush roller 6 cleans the bottom of the matrix pool. The bristles on both sides of the double-rotation brush roller 6 are spirally arranged and rotate in opposite directions. Therefore, the impurities brushed off will be concentrated in the middle under the influence of the spiral bristles and toward the direction of the traction cabin 19 Flow, the side adapter 9 and the double-rotation brush roller 6 rotate relative to each other, and no axial relative movement can be generated. The active bevel gear 13 drives the cylindrical pin 11 to move while rotating, and the cylindrical pin 11 drives the slip ring 10 to move. The slip ring 10 and the side adapter 9 move back and forth along the axial direction of the double-rotation brush roller 6, so that the double-rotation brush roller 6 is pulled by the side adapter 9 while rotating itself, achieving the effect of repeatedly moving while rotating, and the cleaning effect of the bristles on the substrate pool is improved, so that the algae and rot roots in the substrate pool are cleaned, and the factors causing the increase in water temperature are reduced.

[0037] The second motor drives the tensioning roller 32 to rotate, and the tensioning roller 32 drives the filter cloth 15 to move. The impurities sent into the traction cabin 19 by the cleaning mechanism are taken away from the substrate along with the moving filter cloth 15. Since the device is immersed in the substrate, the booster pump pressurizes air into the booster cabin 18, so that the water in the booster cabin 18 is discharged downward. Through the detection of the water level sensor, the substrate is controlled to be able to immerse the pumping jacket 16 without overflowing into the booster cabin 18. After the filter cloth 15 takes the impurities away from the substrate, the impurities adhere to the filter cloth 15, and the scraper 31 scrapes the impurities on the filter cloth 15, thereby cleaning the surface of the filter cloth 15 and enhancing the circulating filtration performance of the filter cloth 15. After each use of the device, the operator opens the sealing cover 30 to remove the impurities accumulated in the booster cabin 18.

[0038] The third motor drives the shaft gear 17 to rotate. The two shaft gears 17 mesh with each other and rotate to suck the substrate backward from the water extraction jacket 16. The sucked substrate has been filtered by the filter cloth 15. The shaft gear 17 sends the substrate into the water supply channel 20, so that the substrate enters the temperature control pipe 22 through the connecting pipe 21.

[0039] The insulation tile 27, the cooling end heat conducting fin 29 and the heating end heat conducting fin 29 all occupy one-third of the outer contour of the heat conducting cylinder 26. Since the contour of each heat conducting cylinder 26 exposed inside the water supply channel 20 is one-third, the electric push rod 23 pulls the rack 24 to move, the rack 24 drives all the pinions 25 to rotate, and the pinions 25 drive the heat conducting cylinder 26 to rotate, which can sequentially control the insulation tile 27, the heat conducting cylinder 26 in contact with the cooling end heat conducting fin 29 and the heat conducting cylinder 26 in contact with the heating end heat conducting fin 29. When in contact with the substrate, the thermal insulation tile 27 does not play a role in heating or cooling the substrate. When the thermal conductive cylinder 26 in contact with the cooling end thermal conductive fins 29 contacts the substrate, it plays a cooling role. When the thermal conductive cylinder 26 in contact with the heating end thermal conductive fins 29 contacts the substrate, it plays a heating role. The temperature of the substrate is detected by the temperature sensor, and then the control system is used to control the thermal conductive cylinder 26 to rotate to different angles, so as to achieve cooling and heating adjustment of the substrate. The substrate after temperature adjustment flows back to the substrate pool from the tail end of the temperature control pipe 22.

[0040] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A substrate temperature detection device with temperature difference control function for soilless cultivation, characterized in that: The invention comprises a main body (1), a front cover (2), a steering wheel (4), a pair of driving wheels (5), a cleaning mechanism, a filtering mechanism and a detection and temperature adjustment mechanism, wherein the front cover (2) is connected to the main body (1), the pair of driving wheels (5) are installed on both sides of the main body (1), the steering wheel (4) is installed on the bottom of the main body (1) away from the front cover (2), the cleaning mechanism is arranged in the front cover (2), the upper part of the main body (1) is provided with a pressurized cabin (18), the lower part of the main body (1) is provided with a traction cabin (19), the filtering mechanism is arranged in the pressurized cabin (18) and the traction cabin (19), and the detection and temperature adjustment mechanism is installed on the top of the main body (1); The cleaning mechanism comprises a double-rotating brush roller (6) and a pair of side brush rollers (14); a pair of side support plates (3) are symmetrically provided on both sides of the front cover (2); a motor compartment is provided on each side support plate (3); a first motor is provided in the motor compartment; the pair of side brush rollers (14) are respectively connected to the first motor; and a driving bevel gear (13) is provided on the side of each side brush roller (14) away from the first motor; A pair of side support plates (3) are rotatably mounted with a spindle (7), both ends of the spindle (7) are mounted with a driven bevel gear (12), the driven bevel gear (12) is meshed with the driving bevel gear (13), a sliding key (8) is provided on the spindle (7), the dual-rotation brush roller (6) is slidably sleeved on the spindle (7) via the sliding key (8), and a side adapter (9) is rotatably mounted on one side of the dual-rotation brush roller (6); A slip ring (10) is connected to the side adapter (9), and a cylindrical pin (11) is eccentrically provided on the active bevel gear (13) close to the side of the slip ring (10), and the cylindrical pin (11) is slidably sleeved in the slip ring (10).

2. The substrate temperature detection device with temperature difference control function for soilless cultivation according to claim 1, characterized in that: The filtering mechanism comprises a filter cloth (15), a plurality of tensioning rollers (32) and a scraper (31); the filter cloth (15) passes through a pressurized cabin (18) and a traction cabin (19); the plurality of tensioning rollers (32) are rotatably installed in the pressurized cabin (18) and the traction cabin (19); the plurality of tensioning rollers (32) tension the filter cloth (15); a second motor is provided on one side of one tensioning roller (32); the second motor is provided in the main body (1); the scraper (31) is installed in the pressurized cabin (18); and the scraper (31) contacts the filter cloth (15).

3. The substrate temperature detection device with temperature difference control function for soilless cultivation according to claim 2, characterized in that: A through slot is provided at the upper end of the main body (1), the through slot is connected to the pressurized cabin (18), a sealing cover (30) is provided at the through slot, a booster pump is installed inside the main body (1), a water level sensor is provided at the junction of the pressurized cabin (18) and the traction cabin (19), the water level sensor and the booster pump are connected to a control system via a circuit, an air extraction end of the booster pump is connected to the outside of the main body (1), and an air pump end of the booster pump is connected to the inside of the pressurized cabin (18).

4. The substrate temperature detection device with temperature difference control function for soilless cultivation according to claim 2, characterized in that: The detection and temperature adjustment mechanism comprises a water pumping jacket (16), a pair of shaft-shaped gears (17) and a pair of temperature control pipes (22); the water pumping jacket (16) is arranged in a traction cabin (19); an opening of the water pumping jacket (16) contacts the filter cloth (15); a pair of shaft-shaped gears (17) are rotatably mounted in the traction cabin (19); a pair of shaft-shaped gears (17) are located in the water pumping jacket (16); a pair of shaft-shaped gears (17) are meshed with each other; a side of the two shaft-shaped gears (17) away from each other is in sealing contact with the water pumping jacket (16); a third motor is mounted on one end of one shaft-shaped gear (17); and the third motor is arranged in the main body (1).

5. The substrate temperature detection device with temperature difference control function for soilless cultivation according to claim 4, characterized in that: Water supply channels (20) are provided on both sides of the main body (1) corresponding to the pumping jacket (16), and each of the water supply channels (20) is connected to the temperature control pipe (22) through a connecting pipe (21). A plurality of temperature conducting cylinders (26) are uniformly distributed laterally inside each of the temperature control pipes (22), and each of the temperature conducting cylinders (26) is rotatably connected to the temperature control pipe (22). A pinion (25) is provided on one side of each of the temperature conducting cylinders (26), and an electric push rod (23) and a rack (24) are further provided inside the temperature control pipe (22). The rack (24) is connected to the piston rod of the electric push rod (23), and the rack (24) is in contact with each pinion (25).

6. The substrate temperature detection device with temperature difference control function for soilless cultivation according to claim 5, characterized in that: A thermal insulation tile (27) is provided on one-third of the outer contour of each of the thermal conductive cylinders (26), and a semiconductor refrigeration plate (28) is provided inside each of the thermal conductive cylinders (26). The cooling end and the heating end of the semiconductor refrigeration plate (28) are in contact with the inner wall of the thermal conductive cylinder (26) through the thermal conductive fins (29).

7. The substrate temperature detection device with temperature difference control function for soilless cultivation according to claim 6, characterized in that: A temperature sensor is provided on the main body (1), and the temperature sensor and the semiconductor refrigeration plate (28) are connected to the control system circuit.

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