Spring corn seedling stage frost experiment device

Abstract

The utility model discloses a spring corn seedling stage frost experiment device which comprises a base and spray holes, the top of the base is covered with a heat preservation box, a hollow groove is formed in the middle of the base, a filter screen is clamped to the bottom of an inner cavity of the hollow groove, a frequency conversion fan is fixedly installed at the top of the filter screen, and an inner cavity of an annular cooling groove is fixedly connected with an annular aluminum plate. A plurality of fins are fixedly connected to the inner wall of the annular aluminum plate at equal intervals, one ends of the fins extend to an inner cavity of the hollow groove, open grooves are formed in the ends of the fins, the middle of the top end of the base is covered with a hollow cover, a transplanting tray is placed at the top of the hollow cover, and a temperature sensor is fixedly installed at the top end of the transplanting tray; according to the frost experiment device in the spring corn seedling stage, nitrogen enters the annular cooling groove through the liquid inlet pipe to cool the annular aluminum plate, then the fins are cooled by the annular aluminum plate, and the air is cooled by the fins, so that the interior of the heat preservation box is cooled, a frost scene is simulated, and a frost experiment is carried out on spring corn seedlings.

Description

Technical Field

[0001] The utility model relates to the technical field of frost experimental devices, in particular to a frost experimental device at the spring corn seedling stage. Background Art

[0002] Frost is a common agricultural meteorological disaster. It refers to a sudden drop in air temperature, where the surface temperature drops below 0°C, causing damage to crops or even death. Frost usually occurs in autumn, winter, and spring. Frost is a common agricultural meteorological disaster. If corn seedlings are frozen during their growth period in spring, it will not only affect their quality, but also reduce their yield. Therefore, it is necessary to simulate the frost process in an experimental form.

[0003] A Chinese utility model is now disclosed, which is a portable frost test box based on liquid nitrogen cooling control. The publication number is: CN212780588U, which includes a test box cover, an air intake fan, a device rack, a circulation fan, a refrigeration box, a battery, an automatic adjustment control board, and a test box. The device rack is arranged at the upper position of the test box, a temperature probe is installed on the device rack, and upper and lower layers of circulation fans are installed at the diagonal positions of the test box. The test box cover is provided with an air intake fan, and the test box wall is provided with an exhaust hole. The refrigeration box is placed at the bottom of the test box; an automatic adjustment control board is arranged outside the test box, and a U disk is plugged on it. The automatic adjustment control board is electrically connected to the temperature probe, the circulation fan and the air intake fan on the mobile device rack through a cable. The branch sample is fixed on the device rack through the sample inlet. The device can realize tracking of the preset temperature control process according to the user's preset frost temperature change curve by obtaining the control time and target temperature, and complete the user-defined frost observation process control and data recording, but there are still the following problems:

[0004] The above-mentioned frost test chamber simulates the frost experiment scene through liquid nitrogen refrigeration, but when the liquid nitrogen is directly released and contacts the plants for cooling, the temperature is low and the plants can be easily frozen to death. Moreover, when the liquid nitrogen is released from the bottom and diffuses into the test chamber, the balance is poor, resulting in temperature differences in the chamber. Utility Model Content

[0005] The utility model aims to provide a frost test device for corn seedlings in spring, so as to solve the problem that the frost test box proposed in the above-mentioned background technology simulates the frost test scene by refrigerating with liquid nitrogen, but when the liquid nitrogen is directly released to contact with the plants for refrigeration, the temperature is low and the plants are easily frozen to death, and when the liquid nitrogen is released from the bottom and diffused into the test box, the balance is poor, resulting in temperature differences in the box.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a spring corn seedling frost experimental device, comprising a base and a spray hole, the top cover of the base is provided with an insulation box, the middle part of the base is provided with a hollow groove, the bottom of the inner cavity of the hollow groove is clamped with a filter screen, the top of the filter screen is fixedly installed with a variable frequency fan, the side of the hollow groove is provided with an annular cooling groove, the inner cavity of the annular cooling groove is fixedly connected with an annular aluminum plate, the inner wall of the annular aluminum plate is equidistantly fixedly connected with a plurality of fins, one end of the fin extends to the inner cavity of the hollow groove, and the end of the fin is provided with a groove, the middle cover of the top of the base is provided with a hollow cover, a transplanting tray is placed on the top of the hollow cover, a temperature sensor is fixedly installed on the top of the transplanting tray, and a plurality of air outlet pipes are equidistantly fixedly connected on both sides of the hollow cover, the tops of the two relatively air outlet pipes are respectively connected with the two ends of the n-shaped tube through connecting joints, and the top of the n-shaped tube is provided with a plurality of spray holes.

[0007] Preferably, a plurality of transplant grooves are provided on the surface of the top of the transplant tray, and a pull-out handle is fixedly connected to one end of the transplant tray.

[0008] Preferably, both sides of the bottom of the transplant tray are provided with slide grooves, the inner cavity of the slide grooves is slidably connected to guide rails, and the guide rails are fixedly connected to the top of the base.

[0009] Preferably, an opening and closing door is hinged on the front of the thermal insulation box, and air-permeable nets are clamped on the tops of both sides of the thermal insulation box.

[0010] Preferably, a light-transmitting plate is fixedly connected to the top of the thermal insulation box, support blocks are fixedly connected to the four corners of the bottom of the base, and a controller is fixedly installed on the front of the base.

[0011] Preferably, a liquid inlet pipe is fixedly connected to the bottom of one side of the base, one end of the liquid inlet pipe is fixedly connected to the solenoid valve, the other end of the liquid inlet pipe is connected to the inner cavity of the annular cooling groove, and a ventilation pipe is fixedly connected to the top of the other side of the base, and one end of the ventilation pipe is connected to the annular cooling groove.

[0012] Preferably, the thermal insulation box comprises a stainless steel shell, a thermal insulation sponge is bonded to one side of the stainless steel shell, and an aluminum film layer is bonded to one side of the thermal insulation sponge.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. Nitrogen is introduced into the annular cooling tank through the liquid inlet pipe to cool the annular aluminum plate, and the annular aluminum plate cools the fins. The variable frequency fan then absorbs the external air to the vicinity of the fins for heat and cold replacement. The replaced air then enters the inner cavity of the air outlet pipe through the hollow cover, and then is sprayed from top to bottom on the surface of the plant through the spray holes on the n-shaped tube, thereby cooling the inside of the incubator, simulating a frost scene, and conducting a frost experiment on spring corn seedlings.

[0015] 2. The transplant tray is slidably connected to the top of the hollow cover through guide rails and slide grooves, so that the transplant tray can slide out of the inner cavity of the incubator, thereby facilitating the transplantation of corn seedlings. A number of n-shaped tubes are arranged on the top of the transplant tray. Cold air is sprayed from top to bottom from the spray holes in the inner cavity of the n-shaped tubes and directly sprayed on the surface of the plants, making the temperature near the plants more uniform, and there will be no scene where one side is frozen and the other side is not frozen. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 It is a cross-sectional view of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the transplant tray of the utility model;

[0019] Figure 4 It is a partial cross-sectional view of the thermal insulation box of the utility model.

[0020] In the figure: 1. base; 2. insulation box; 3. hollow groove; 4. filter; 5. frequency conversion fan; 6. annular cooling groove; 7. annular aluminum plate; 8. fin; 9. slot; 10. hollow cover; 11. transplant tray; 12. temperature sensor; 13. air outlet pipe; 14. connecting joint; 15. n-shaped pipe; 16. spray hole; 17. guide rail; 18. slide; 19. transplant groove; 20. pull-out handle; 21. liquid inlet pipe; 22. solenoid valve; 23. ventilation pipe; 24. support block; 25. opening and closing door; 26. light-transmitting plate; 27. breathable net; 28. controller; 29. ​​stainless steel shell; 30. insulation sponge; 31. aluminum film layer. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-4The utility model provides a spring corn seedling frost experimental device, comprising a base 1 and a spray hole 16, a heat preservation box 2 is provided on the top cover of the base 1, a hollow groove 3 is provided in the middle of the base 1, a filter screen 4 is clamped at the bottom of the inner cavity of the hollow groove 3, a variable frequency fan 5 is fixedly installed on the top of the filter screen 4, an annular cooling groove 6 is provided on the side of the hollow groove 3, an annular aluminum plate 7 is fixedly connected to the inner cavity of the annular cooling groove 6, a plurality of fins 8 are fixedly connected to the inner wall of the annular aluminum plate 7 at equal intervals, and the fins 8 are fixedly connected to the inner wall of the annular aluminum plate 7 at equal intervals. One end extends to the inner cavity of the hollow groove 3, and the end of the fin 8 is provided with a slot 9, a hollow cover 10 is provided in the middle of the top of the base 1, a transplant tray 11 is placed on the top of the hollow cover 10, a temperature sensor 12 is fixedly installed on the top of the transplant tray 11, and a plurality of air outlet pipes 13 are fixedly connected at equal distances on both sides of the hollow cover 10, and the tops of the two air outlet pipes 13 are respectively connected to the two ends of the n-shaped tube 15 through the connecting joints 14, and a plurality of spray holes 16 are provided on the top of the n-shaped tube 15;

[0023] More specifically, the spring corn seedlings are transplanted to the transplant tray 11, and then the external nitrogen is passed into the inner cavity of the annular cooling trough 6. At this time, the liquid nitrogen cools the annular aluminum plate 7, and the annular aluminum plate 7 cools the fins 8. Then the variable frequency fan 5 adsorbs the external air to the vicinity of the filter screen 4 for filtration and then reaches the vicinity of the fins 8 for cold and hot replacement. The replaced air then passes through the hollow cover 10 into the inner cavity of the air outlet pipe 13, and then is sprayed from top to bottom on the surface of the plant through the spray hole 16 on the n-shaped tube 15, thereby cooling the inside of the incubator 2, simulating a frost scene, and conducting a frost experiment on the spring corn seedlings.

[0024] See also Figure 1-4 Furthermore, a plurality of transplant grooves 19 are provided on the surface of the top of the transplant tray 11, a pull-out handle 20 is fixedly connected to one end of the transplant tray 11, and slide grooves 18 are provided on both sides of the bottom of the transplant tray 11. The inner cavity of the slide groove 18 is slidably connected to a guide rail 17, and the guide rail 17 is fixedly connected to the top of the base 1. The transplant tray 11 is pulled outward by holding the pull-out handle 20, and the slide groove 18 is driven to slide on the surface of the guide rail 17 by pulling the transplant tray 11, so that the transplant tray 11 slides out of the inner cavity of the incubator 2.

[0025] See also Figure 1-4 Furthermore, an opening and closing door 25 is hinged on the front of the insulated box 2, and air-permeable nets 27 are clamped on the tops of both sides of the insulated box 2. A light-transmitting plate 26 is fixedly connected to the top of the insulated box 2, and support blocks 24 are fixedly connected to the four corners of the bottom of the base 1. A controller 28 is fixedly installed on the front of the base 1. The support blocks 24 make the bottom of the base 1 suspended in the air to facilitate air intake, and the light-transmitting plate 26 facilitates the entry of sunlight, imitating the natural growth environment, and also facilitates the observation of the condition of the corn seedlings.

[0026] See also Figure 1-4Furthermore, a liquid inlet pipe 21 is fixedly connected to the bottom of one side of the base 1, one end of the liquid inlet pipe 21 is fixedly connected to the solenoid valve 22, and the other end of the liquid inlet pipe 21 is connected to the inner cavity of the annular cooling groove 6. A ventilation pipe 23 is fixedly connected to the top of the other side of the base 1, and one end of the ventilation pipe 23 is connected to the annular cooling groove 6. The output end of the liquid nitrogen tank is connected to one end of the solenoid valve 22, and then the solenoid valve 22 works, so that part of the nitrogen in the liquid nitrogen tank enters the inner cavity of the annular cooling groove 6 through the liquid inlet pipe 21.

[0027] See also Figure 1-4 Furthermore, the thermal insulation box 2 includes a stainless steel shell 29 , a thermal insulation sponge 30 is bonded to one side of the stainless steel shell 29 , and an aluminum film layer 31 is bonded to one side of the thermal insulation sponge 30 , thereby improving the thermal insulation performance of the thermal insulation box 2 .

[0028] When in use, first connect the output end of the liquid nitrogen tank to one end of the solenoid valve 22, then open the opening and closing door 25, hold the pull-out handle 20 to pull the transplanting tray 11 outward, and drive the slide 18 to slide on the surface of the guide rail 17 by pulling the transplanting tray 11, so that the transplanting tray 11 slides out of the inner cavity of the insulated box 2, and then transplant the spring corn seedlings into the inner cavity of the transplanting groove 19. After the transplantation is completed, push the transplanting tray 11 into the inner cavity of the insulated box 2, and then close the opening and closing door 25, and set the required temperature in the insulated box 2 through the controller 28, and then the solenoid valve 22 works, so that part of the nitrogen in the liquid nitrogen tank enters the inner cavity of the annular cooling groove 6 through the liquid inlet pipe 21. At this time Liquid nitrogen cools the annular aluminum plate 7, and the annular aluminum plate 7 cools the fins 8. The variable frequency fan 5 then absorbs the external air to the vicinity of the filter screen 4 for filtration and then reaches the vicinity of the fins 8 for cold and heat replacement. The replaced air then enters the inner cavity of the air outlet pipe 13 through the hollow cover 10, and then is sprayed from top to bottom on the surface of the plant through the spray hole 16 on the n-shaped tube 15, thereby cooling the inside of the incubator 2. A frost scene is simulated to conduct a frost experiment on spring corn seedlings. When the temperature sensor 12 detects that the temperature in the incubator 2 reaches the setting range of the controller 28, the solenoid valve 22 is closed, and the variable frequency fan 5 reduces the wind speed to prevent the corn seedlings from being directly frozen.

[0029] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A spring corn seedling frost experimental device, comprising a base (1) and a spray hole (16), characterized in that: The top cover of the base (1) is provided with a heat preservation box (2), the middle part of the base (1) is provided with a hollow groove (3), the bottom of the inner cavity of the hollow groove (3) is clamped with a filter screen (4), the top of the filter screen (4) is fixedly installed with a variable frequency fan (5), the side of the hollow groove (3) is provided with an annular cooling groove (6), the inner cavity of the annular cooling groove (6) is fixedly connected with an annular aluminum plate (7), the inner wall of the annular aluminum plate (7) is fixedly connected with a plurality of fins (8) at equal intervals, one end of the fin (8) extends to the inner cavity of the hollow groove (3), and the fins (8) are fixedly connected to the inner cavity of the hollow groove (3). The end of the fin (8) is provided with a slot (9), the middle cover at the top of the base (1) is provided with a hollow cover (10), a transplant tray (11) is placed on the top of the hollow cover (10), a temperature sensor (12) is fixedly installed on the top of the transplant tray (11), and a plurality of air outlet pipes (13) are fixedly connected at equal distances on both sides of the hollow cover (10), and the tops of the two air outlet pipes (13) are respectively connected to the two ends of an n-shaped tube (15) through connecting joints (14), and a plurality of spray holes (16) are provided on the top of the n-shaped tube (15).

2. A spring corn seedling frost experimental device according to claim 1, characterized in that: A plurality of transplantation grooves (19) are provided on the surface of the top of the transplantation tray (11), and a pull-out handle (20) is fixedly connected to one end of the transplantation tray (11).

3. The spring corn seedling frost experimental device according to claim 1, characterized in that: Both sides of the bottom of the transplant tray (11) are provided with slide grooves (18), the inner cavity of the slide groove (18) is slidably connected to a guide rail (17), and the guide rail (17) is fixedly connected to the top of the base (1).

4. The spring corn seedling frost experimental device according to claim 1, characterized in that: The front of the heat preservation box (2) is hinged with an opening and closing door (25), and the tops of both sides of the heat preservation box (2) are clamped with air-permeable nets (27).

5. The spring corn seedling frost experimental device according to claim 1, characterized in that: The top of the thermal insulation box (2) is fixedly connected to a light-transmitting plate (26), the four corners of the bottom of the base (1) are fixedly connected to support blocks (24), and the front of the base (1) is fixedly mounted with a controller (28).

6. The spring corn seedling frost experimental device according to claim 1, characterized in that: The bottom of one side of the base (1) is fixedly connected to a liquid inlet pipe (21), one end of the liquid inlet pipe (21) is fixedly connected to a solenoid valve (22), the other end of the liquid inlet pipe (21) is connected to the inner cavity of the annular cooling groove (6), and the top of the other side of the base (1) is fixedly connected to a ventilation pipe (23), and one end of the ventilation pipe (23) is connected to the annular cooling groove (6).

7. The spring corn seedling frost experimental device according to claim 1, characterized in that: The heat preservation box (2) comprises a stainless steel shell (29), a heat preservation sponge (30) is bonded to one side of the stainless steel shell (29), and an aluminum film layer (31) is bonded to one side of the heat preservation sponge (30).

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