A new soilless culture box

Abstract

A new soilless culture box belongs to the technical field of crop cultivation equipment, which comprises a soilless culture box body with a culture box, a nutrient solution tank and a light supplementing lamp, a fixing plate, a solenoid valve, a control circuit, an electric heating mechanism and a prompt circuit; the culture box body and the nutrient solution tank are attracted together by a magnet; the fixing plate has multiple sets; the upper end of each planting hole of the culture box is provided with a magnet ring A; the lower end of the fixing plate is provided with a magnet ring B; the fixing plate is installed on each planting hole through the attraction of the magnet ring B and the magnet ring A; the light supplementing lamp is installed on the fixing plate; the electric heating mechanism comprises an electric heating pipe, a cylinder, an outer shell and a temperature switch; the control circuit and the prompt circuit are installed in an electric control box and are electrically connected. The new type brings convenience to the cleaning and replacement of the culture box and the nutrient solution tank, realizes resource recycling, facilitates the growth of different types of crops, and can send an alarm sound to prompt the staff to handle when the nutrient solution in the nutrient solution tank stops flowing.

Description

Technical Field

[0001] This utility model relates to the field of agricultural cultivation equipment technology, and in particular to a novel soilless cultivation box. Background Technology

[0002] Soilless cultivation boxes are devices that cultivate plants without soil and using nutrient solutions. By providing suitable light, water and nutrient solutions, they simulate the growth conditions in the natural environment, allowing plants to thrive in a soilless environment. They have the advantages of high efficiency, water conservation, high yield, high quality and space saving. There are several types of soilless cultivation boxes, each with its own unique characteristics and applicable scenarios: (1) Hydroponic column system: Planting through vertical columns, suitable for families or indoor planting with limited space, allowing a large number of vegetables to be planted in a small area; (2) NFT system (Nutrient Film Technique): Plant roots are immersed in a constantly flowing thin layer of nutrient solution, suitable for planting vegetables with short roots, such as lettuce and coriander; (3) Seedling rack system: Provides the best growth environment for vegetable seedlings, suitable for early seedling cultivation of vegetables, helping to quickly cultivate strong plant seedlings; (4) Zipper system: Connected to the hydroponic tank through a special zipper structure, suitable for planting leafy vegetables, simple to operate and effectively avoiding root rot problems. The most widely used soilless cultivation box generally includes a box body, a culture medium inside the box (soilless culture medium includes fiber balls, broad bean pods, vermiculite sand, etc., which vary), a nutrient solution tank at the bottom of the box body, and an opening at the top of the box body (planting hole) as a root-limiting mechanism for the crop, which can position the lower part of the crop after it grows to a certain extent and prevent it from falling over. The opening at the bottom of the box body allows the crop roots to be located in the nutrient solution tank through the opening, so that the crop can receive a variety of nutrients for healthy growth (LED supplemental lights are installed on the support at the top of the box body as a light source).

[0003] With the advancement of agricultural technology, the functions of soilless cultivation boxes have become increasingly sophisticated. For example, the authorized patent in my country, patent number "201620645118.4," entitled "Soilless Cultivation Box for Plants," states that "this utility model achieves high survival rates in soilless cultivation, facilitates oxygenation, and prevents root rot." As can be seen above, although the patent achieves the described technological effects, due to structural limitations, like other soilless cultivation boxes in this field, it still has the following shortcomings that urgently need improvement. Firstly, the nutrient solution lacks heat preservation; when the indoor temperature is too low or the indoor heat preservation equipment malfunctions, it will adversely affect crop growth. Secondly, it lacks a monitoring function; when the nutrient solution circulation pump malfunctions, it cannot guarantee the circulation of nutrient solution into and out of the nutrient box, which will also adversely affect crop growth. Thirdly, the inner diameter of the planting holes is not adjustable, meaning that one cultivation box can only be used for one type of crop (if the planting holes are too small, the roots of the corresponding crop will grow larger, affecting the crop's growth; conversely, if the planting holes are too large, they will not effectively restrain the roots of the corresponding crop, increasing the chance of lodging). Fourthly, the cultivation box and nutrient solution tank are integrated, which makes it inconvenient for staff to clean the nutrient solution tank, and the entire box needs to be replaced if it is damaged, resulting in higher operating costs and hindering the efficient use of resources. Utility Model Content

[0004] To overcome the shortcomings of existing hydroponic cultivation boxes due to structural limitations, as described in the background, this utility model provides a new type of hydroponic cultivation box with a separate structure for the cultivation box and nutrient solution tank. This facilitates subsequent cleaning and replacement of damaged cultivation boxes and nutrient solution tanks by staff. The movable fixing plates with different inner diameters allow for convenient growth restriction of crops with different root types and sizes. Furthermore, the nutrient solution tank has a heat preservation function and can immediately sound an alarm when the nutrient solution stops flowing, prompting staff to take action. This makes it a more favorable material for healthy crop growth.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A novel hydroponics box includes a main body comprising a cultivation box, a nutrient solution tank, and an LED supplemental light; a fixing plate; a solenoid valve; and a hydroponics culture medium within the main body. It also includes a control circuit, an electric heating mechanism, and a notification circuit. The cultivation box and nutrient solution tank are separate structures. An upper magnetic ring is fixedly installed around the lower perimeter of the cultivation box, and a lower magnetic ring is fixedly installed around the upper perimeter of the nutrient solution tank. The cultivation box and nutrient solution tank are attracted together by the upper and lower magnetic rings. Multiple sets of fixing plates are included, each set containing multiple fixing plates. Each fixing plate has limit holes. A magnetic ring A is fixedly installed at the upper end of each planting hole in the main body, and a magnetic ring B is fixedly installed at the lower end of the fixing plate. Each fixing plate is attracted to each planting hole via magnetic rings B and A. A fixing frame is fixedly installed on the rear outer side of the cultivation box, and the LED supplemental light is also included. The lamp is fixedly installed on the lower side of the upper end of the mounting bracket; the electric heating mechanism includes an electric heating tube, a cylinder, an outer shell, and a temperature switch. An inlet pipe and an outlet pipe are fixedly installed on both sides of the cylinder, respectively. The electric heating tube is fixedly installed on the outer side of the cylinder, and the outer shell is fixedly installed on the outer side of the electric heating tube. The inlet pipe is fixedly connected to the outlet end of the circulating pump. Connecting pipes are fixedly installed on both sides of the lower end of the nutrient solution tank. There are at least two solenoid valves. One end of the connecting pipe is fixedly connected to one end of the first solenoid valve, and the other end of the first solenoid valve is fixedly connected to the outlet pipe of the cylinder. The other end of the connecting pipe is fixedly connected to one end of the second solenoid valve, and the other end of the second solenoid valve is fixedly connected to the return pipe of the nutrient solution tank. The control circuit and the indicator circuit are installed inside the electrical control box. The multi-channel power output terminal of the control circuit is electrically connected to the power input terminals of the two solenoid valves, the electric heating tube, and the circulating pump, respectively.

[0007] Furthermore, the inner diameter of the magnet ring A is the same as the inner diameter of the implantation hole, the outer diameter and inner diameter of the magnet ring A and the magnet ring B are the same, and the polarities of the upper end of the magnet ring A and the lower end of the magnet ring B are opposite.

[0008] Furthermore, the outer and inner diameters of the upper and lower magnet rings are the same, and the polarities of the lower part of the upper magnet ring and the upper part of the lower magnet ring are opposite.

[0009] Furthermore, the solenoid valve is a normally closed valve core solenoid valve.

[0010] Furthermore, the inner diameter of the limiting hole of each set of fixing plates is inconsistent, and the inner diameter of the planting hole of the cultivation box is larger than the inner diameter of the limiting hole of all fixing plates.

[0011] Furthermore, the control circuit includes two sets of time control switches and relays that are electrically connected. The negative power output terminal of the first set of time control switches is connected to the negative power input terminal of the second relay and the negative power input terminal of the second set of time control switches. The positive power output terminal of the first set of time control switches is connected to the positive power input terminal of the second set of time control switches and the positive power input terminal of the second relay.

[0012] Furthermore, the prompting circuit includes an electrically connected pressure switch and an alarm. One end of the pressure switch is connected to the positive power input terminal of the alarm. The upper outer side of the pipe connected to the liquid inlet pipe of the cylinder has a mounting hole. The air inlet pipe of the pressure switch is installed in the mounting hole. The other end of the pressure switch is connected to the positive power output terminal of the second set of time control switches. The negative power input terminal of the alarm is connected to the negative power output terminal of the second set of time control switches. The negative power input terminal of the first set of time control switches is connected to the negative power input terminal of the first relay.

[0013] Furthermore, in the electric heating mechanism, one end of the temperature switch is connected to the positive power input terminal of the first relay of the control circuit, the other end of the temperature switch is connected to the positive power output terminal of the first set of time control switches, the two normally open contact terminals of the first relay are electrically connected to the power input terminals of multiple electric heating tubes, and the temperature switch is fixedly installed on the outside of the pipe connected to the liquid outlet pipe of the cylinder.

[0014] Compared with the prior art, the advantages of this utility model are: (1) Based on the soilless cultivation box body, the cultivation box and nutrient solution box are separate structures, which brings convenience to the staff for cleaning the nutrient solution box, replacing the damaged cultivation box and nutrient solution box, etc., and effectively realizes resource recycling (for example, after the nutrient solution box or cultivation box is damaged, only one of the damaged ones can be replaced, and the other intact one can continue to be used); (2) The movable fixing plate with different inner diameters is fixed by magnetic attraction, which can facilitate the limited growth of crops with different types and sizes of roots; (3) Under the joint action of the electric heating mechanism, the nutrient solution in the nutrient solution box has a heat preservation function. When the nutrient solution stops flowing and the pressure becomes low in the nutrient solution box, an alarm sound can be emitted to prompt the staff to deal with it, which is more conducive to the healthy growth of crops. In summary, this utility model has good application prospects. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a partial structural schematic diagram of the present invention.

[0018] Figure 3 This is the circuit diagram of this utility model. Detailed Implementation

[0019] Figure 1 , 2As shown in Figure 3, a novel hydroponic cultivation box includes a cultivation box 1, a nutrient solution tank 2, and an LED supplementary light H, a fixing plate 3, a solenoid valve DCN, and a hydroponic culture medium (not shown in the figure) inside the hollow hydroponic cultivation box body; it also includes a control circuit 4, an electric heating mechanism 5, and a prompting circuit 6; the cultivation box body 1 and the nutrient solution tank 2 are of a separate structure, a rectangular hollow upper permanent magnet 101 is glued and fixed to the lower periphery of the cultivation box 1, and a rectangular hollow lower permanent magnet 21 is glued and fixed to the upper periphery of the nutrient solution tank 2. The lower end of the cultivation box 1 and the nutrient solution tank 2 are connected to the nutrient solution tank 2. The upper end of the nutrient solution tank 2 is attracted and bonded together by the lower magnet 21 and the upper magnet 101; there are multiple sets of fixing plates 3, and multiple fixing plates 3 in each set. The fixing plate 3 has a limiting hole 31 in the middle. A hollow permanent magnet ring A7 is glued and fixed to the upper end of the planting hole 102 of each cultivation box 1, and a hollow permanent magnet ring B8 is glued and fixed to the lower end of the fixing plate. Each fixing plate is attracted to the magnet ring A7 by the magnet ring B8 and then installed on each planting hole of the fixing plate 3; a "˥"-shaped fixing frame is fixedly installed on the rear outer end of the cultivation box, and the LED supplement light H is horizontally fixed. The electric heating mechanism includes an electric heating tube RT, a cylinder 51, an outer shell 52, and a temperature switch W1. An inlet pipe 511 and an outlet pipe 512 are fixedly installed on the middle of both sides of the cylinder 51. Multiple electric heating tubes RT are distributed in a ring and fixedly installed on the outer side of the cylinder 51. The outer shell 52 is sealed and fixedly installed on the outer side of the electric heating tube RT (the outer side of the outer shell 52 is wrapped with heat insulation material rock wool). The inlet pipe 511 and the outlet of the circulation pump M (submersible pump) are fixedly connected by a pipeline. The inlet of the circulation pump M is located inside the nutrient solution raw material tank (not shown in the figure). The lower end of the nutrient solution tank 2 has a connecting pipe fixedly installed on each of its two sides, which communicates with the inside of the tank. There are two solenoid valves DCN. The outer side of the left connecting pipe is fixedly connected to one end of the first solenoid valve DCN, and the other end of the first solenoid valve DCN is fixedly connected to the outlet pipe 512 of the cylinder via a pipe. The outer side of the right connecting pipe is fixedly connected to one end of the second solenoid valve, and the other end of the second solenoid valve is fixedly connected to the return pipe at the upper end of the nutrient solution raw material tank via a pipe. The power module A1, the control circuit 4, and the prompting circuit 6 are installed on the circuit board inside the electrical control box 9. The electrical control box 9 is fixedly installed on the upper front end of the fixing plate 8.

[0020] Figure 1 , 2As shown in Figure 3, the inner diameter of magnet ring A7 is the same as the inner diameter of planting hole 102. The outer and inner diameters of magnet ring A7 and magnet ring B8 are the same, and the polarities of the upper end of magnet ring A7 and the lower end of magnet ring B8 are opposite. The outer and inner diameters of upper magnet ring 101 and lower magnet ring 21 are the same, and the polarities of the lower side of upper magnet ring 101 and the upper side of lower magnet ring 21 are opposite. Solenoid valve DCN is a normally closed valve core solenoid valve. The inner diameter of the limiting hole 31 in the middle of each set of fixing plates 3 is not the same. The inner diameter of planting hole 102 of cultivation box 1 is larger than the inner diameter of limiting hole 31 of all fixing plates 3. The control circuit includes two sets of time switches A2 and A3 and relays J1 and J2 connected to a circuit board. The negative power output terminal 4 of the first set of time switches A2 is connected to the negative power input terminal of the second relay J2 and the negative power input terminal 2 of the second set of time switches A3. The positive power output terminal 3 of the first set of time switches A2 is connected to the positive power input terminal 1 of the second set of time switches A3 and the positive power input terminal of the second relay J2. The warning circuit includes a pressure switch T and an alarm B connected by wires. One end of the pressure switch T is connected to the positive power input terminal of the alarm B. There is a threaded hole on the outer side of the upper end of the pipe connected to the liquid inlet pipe of the cylinder. The air inlet pipe of the pressure switch T is screwed into the threaded hole and installed on the outer side of the pipe. The other end of the pressure switch T is connected to pin 3 of the positive power output terminal of the second set of time control switches A3. The negative power input terminal of the alarm B is connected to pin 4 of the negative power output terminal of the second set of time control switches A3. Pin 2 of the negative power input terminal of the first set of time control switches A2 is connected to the negative power input terminal of the first relay J1. In the electric heating mechanism, one end of the temperature switch W1 is connected to the positive power input terminal of the first relay J1 in the control circuit. The other end of the temperature switch W1 is connected to pin 3 of the positive power output terminal of the time control switch A2. The two normally open contacts of the first relay J1 are connected to the power input terminals of multiple electric heating tubes RT via wires. The temperature switch W1 is fixedly installed on the outer side of the pipe connected to the liquid outlet pipe of the cylinder, with the temperature sensing surface of the temperature switch W1 in close contact with the outer side of the pipe. The power input terminals 1 and 2 of power module A1, the two control circuit input terminals of relays J1 and J2 in the control circuit, and the two poles of AC 220V power supply are connected by wires. The power output terminals 3 and 4 of time switch A2 are connected by wires to the power input terminals of two solenoid valves DCN. The two normally open contacts of relay J2 are connected by wires to the power input terminal of circulating pump M. The two normally open contacts of relay J1 are connected by wires to the power input terminals of multiple electric heating tubes RT.

[0021] Figure 1 , 2As shown in Figure 3, this utility model is based on a soilless cultivation box body. The cultivation box 1 and the nutrient solution tank 2 are separate structures and are magnetically connected, which brings convenience to the staff for cleaning the nutrient solution tank 2 and replacing damaged cultivation boxes 1 and nutrient solution tank 2, and effectively realizes resource recycling (for example, if the nutrient solution tank 2 or the cultivation box 1 is damaged, only one of the damaged ones can be replaced, and the other intact one can continue to be used). Before cultivation, the staff selects a fixing plate 3 with different inner diameters of limiting holes 31 according to the outer diameter of the root of the crop to be cultivated. Since the fixing plate and the planting hole of the cultivation box are magnetically connected around the sides by magnets A and B, it can be easily fixed and replaced; and it can facilitate the fixed growth of crops with different types and sizes of roots; it prevents the problem that one cultivation box can only be used for one type of crop (if the planting hole 102 is too small, it will affect the growth of the crop when the corresponding crop root grows larger; conversely, if the planting hole 102 is too large, it will not play a good limiting role for the root of the corresponding crop, and there is a chance of the crop lodging).

[0022] Figure 1 , 2As shown in Figure 3, after the 220V power supply enters the power input terminal of the power module A1, pins 3 and 4 output 12V DC power, which then enters the power input terminals of the control circuit and the indicator circuit. After turning on the power switch S1, the LED supplementary light H is powered on and provides suitable lighting for the crops. After the timer switch A2 is energized, its pins 3 and 4 output power (time adjustable) to relays J1 and J2, the two solenoid valves DCN, and the power input terminal of the timer switch A3 at regular intervals. For example, it outputs power for 2 minutes every 2 minutes to relays J1 and J2 and the power input terminal of the two solenoid valves DCN (the valve cores of the two solenoid valves DCN open when energized). Relay J2 is energized and its control power input terminal and normally open contact close. The circulation pump M is energized and draws the nutrient solution from the nutrient solution raw material tank into the nutrient solution tank 2. The nutrient solution in the nutrient solution tank 2 flows out through the solenoid valve at the right end of the nutrient solution tank into the nutrient solution raw material tank. The flow of nutrient solution in and out replaces the nutrient solution in the nutrient solution tank, providing suitable nutrient solution for the crops (and ensuring that the temperature in the nutrient solution tank does not become too low). When relay J1 is energized, its control power input terminal and normally open contact terminal close, thereby energizing multiple electric heating tubes RT to heat the nutrient solution flowing in and out of the cylinder. Specifically, when the temperature of the liquid flowing out of the cylinder into the nutrient solution tank is lower than a certain level (e.g., below 20°C, the actual temperature is adjustable), the internal contacts of temperature switch W1 close. Subsequently, relay J1 is energized, closing its control power input terminal and normally open contact terminal, energizing the electric heating tubes RT to heat the liquid flowing in and out of the cylinder. When the liquid flowing out of the cylinder into the nutrient solution tank... When the liquid temperature in the tank exceeds a certain level (e.g., above 20°C), the internal contacts of the temperature switch W1 will open, the relay J1 will lose power and no longer engage, and its control power input and normally open contact terminals will open. The electric heating tube RT will no longer heat the liquid flowing in and out of the cylinder. Through the above, the water temperature entering the nutrient solution tank of this new type is around 20°C. (Although there is a 2-minute interval when the liquid is heated in this new type, the nutrient solution in the nutrient solution tank cools down slowly, and the temperature will not drop much before the next heating, so it will not have an adverse effect on crop growth.)

[0023] Figure 1 , 2As shown in Figure 3, after the timer switch A3 is energized, its pins 3 and 4 output power for 115 seconds at 5-second intervals to the positive power input terminal of the pressure switch T and the negative power input terminal of the alarm B (the 5-second delay ensures that the pressure switch and other devices will only be energized to detect liquid flow after the circulating pump outputs pressurized liquid). When the circulating pump M is working normally, the pressure detected by the pressure switch T increases, and its internal contacts open. Therefore, the alarm B will not be energized and will not sound, indicating that the circulating pump is normally pumping nutrient solution into the nutrient solution tank. When the circulating pump M malfunctions and cannot pump nutrient solution into the nutrient solution tank, the pressure detected by the pressure switch T decreases, and its internal contacts close. This will energize the alarm B and it will sound, indicating that the circulating pump is not properly pumping nutrient solution into the nutrient solution tank, allowing staff to perform timely maintenance or replacement. Figure 3 In this invention, relays J1 and J2 are DC12V; alarm B is an FM12V continuous audible alarm; solenoid valve DCN is a 2W normally closed solenoid valve; LED supplementary light has a power of 10W; temperature switch W1 is an adjustable temperature control switch (normally closed contact); electric heating element RT is a straight-bar dry-burning stainless steel armored 300W electric heating element; time switches A2 and A3 are KG316T time switches, which have two power input terminals, two power output terminals, and seven setting buttons. By adjusting the seven setting buttons, the output time of the two power output terminals can be set; circulating pump M is a 100W small submersible pump; power module A1 is an AC 220V to DC 12V power module; and pressure switch T is an adjustable normally closed contact pressure switch. All electronic components used in this invention are mature products; therefore, this application will not elaborate on their specific structures and working principles.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model.

[0025] Furthermore, it should be understood that although this specification describes the embodiments, the embodiments do not necessarily contain only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A novel hydroponic cultivation box, comprising a hydroponic cultivation box body having a cultivation box, a nutrient solution tank, and an LED supplemental light, a fixing plate, a solenoid valve, and a hydroponic culture medium inside the hydroponic cultivation box body; characterized in that, It also features a control circuit, an electric heating mechanism, and a notification circuit. The cultivation box and nutrient solution tank are separate structures. An upper magnetic ring is fixedly installed around the lower perimeter of the cultivation box, and a lower magnetic ring is fixedly installed around the upper perimeter of the nutrient solution tank. The cultivation box and nutrient solution tank are attracted together by the lower and upper magnetic rings. Multiple sets of fixing plates are included, each set containing multiple fixing plates. Each fixing plate has limit holes. A magnetic ring A is fixedly installed at the upper end of each planting hole in the soilless cultivation box body, and a magnetic ring B is fixedly installed at the lower end of the fixing plate. Each fixing plate is attracted to each planting hole via magnetic rings B and A. A fixing frame is fixedly installed on the rear outer side of the cultivation box, and an LED supplemental light is fixedly installed on the lower side of the upper end of the fixing frame. The electric heating mechanism includes an electric heating tube, a cylinder, and... The outer casing and temperature switch are fixedly installed on both sides of the cylinder with inlet and outlet pipes respectively. The electric heating element is fixedly installed on the outer side of the cylinder, and the outer casing is fixedly installed on the outer side of the electric heating element. The inlet pipe and the outlet of the circulation pump are fixedly connected. Connecting pipes are fixedly installed on both sides of the lower end of the nutrient solution tank. There are at least two solenoid valves. One end of the connecting pipe is fixedly connected to the outer side of the first solenoid valve, and the other end of the first solenoid valve is fixedly connected to the outlet pipe of the cylinder. The other end of the connecting pipe is fixedly connected to the outer side of the second solenoid valve, and the other end of the second solenoid valve is fixedly connected to the return pipe of the nutrient solution tank. The control circuit and the prompting circuit are installed in the electrical control box. The multi-power output terminal of the control circuit is electrically connected to the power input terminals of the two solenoid valves, the electric heating element, and the circulation pump respectively.

2. The novel soilless cultivation box according to claim 1, characterized in that, The inner diameter of magnet ring A is the same as the inner diameter of the implantation hole. The outer and inner diameters of magnet ring A and magnet ring B are the same. The upper end of magnet ring A and the lower end of magnet ring B have opposite polarities.

3. The novel soilless cultivation box according to claim 1, characterized in that, The outer and inner diameters of the upper and lower magnet rings are the same, and the polarities of the lower part of the upper magnet ring and the upper part of the lower magnet ring are opposite.

4. The novel soilless cultivation box according to claim 1, characterized in that, The solenoid valve is a normally closed solenoid valve with a spool.

5. A novel soilless cultivation box according to claim 1, characterized in that, The inner diameter of the limiting hole of each set of fixing plates is not the same, and the inner diameter of the planting hole of the cultivation box is larger than the inner diameter of the limiting hole of all fixing plates.

6. A novel soilless cultivation box according to claim 1, characterized in that, The control circuit includes two sets of time switches and relays that are electrically connected. The negative power output terminal of the first set of time switches is connected to the negative power input terminal of the second relay and the negative power input terminal of the second set of time switches. The positive power output terminal of the first set of time switches is connected to the positive power input terminal of the second set of time switches and the positive power input terminal of the second relay.

7. A novel soilless cultivation box according to claim 6, characterized in that, The warning circuit includes an electrically connected pressure switch and an alarm. One end of the pressure switch is connected to the positive power input terminal of the alarm. There is a mounting hole on the outer side of the upper end of the pipe connected to the liquid inlet pipe of the cylinder. The air inlet pipe of the pressure switch is installed in the mounting hole. The other end of the pressure switch is connected to the positive power output terminal of the second set of time control switches. The negative power input terminal of the alarm is connected to the negative power output terminal of the second set of time control switches. The negative power input terminal of the first set of time control switches is connected to the negative power input terminal of the first relay.

8. A novel soilless cultivation box according to claim 6, characterized in that, In the electric heating mechanism, one end of the temperature switch is connected to the positive power input terminal of the first relay in the control circuit, and the other end of the temperature switch is connected to the positive power output terminal of the first set of time control switches. The two normally open contacts of the first relay are electrically connected to the power input terminals of multiple electric heating tubes. The temperature switch is fixedly installed on the outside of the pipe connected to the liquid outlet pipe of the cylinder.

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