Nutrient solution automatic circulating device for hydroponic cabinet

Abstract

The utility model relates to a kind of automatic nutrient solution circulating device for hydroponic cabinet, circulating system cabinet includes more than one mother liquor tank, mother liquor pump, nutrient solution tank and control platform;Liquid inlet pipe is connected between mother liquor tank and nutrient solution tank;Nutrient solution tank is connected with inflation tube;Nutrient solution tank is connected with water inlet pipe;Nutrient solution output pipe and nutrient solution return pipe are communicated with hydroponic tank;EC sensor is equipped in nutrient solution tank;Control platform is connected with mother liquor pump, solenoid valve, EC sensor, inflation pump, water inlet pump and nutrient solution pump by bus.The utility model has the advantages that: each mother liquor tank is sequentially fed, prevent each mother liquor from reacting in liquid inlet pipe, affect nutrient solution component;Aeration head can oxygenate nutrient solution, prevent root rot, also can use bubble, quickly mix nutrient solution uniformly;Nutrient solution tank and hydroponic tank nutrient solution circulate, and periodically monitor nutrient solution concentration, supplement mother liquor and water amount in time, avoid nutrient solution concentration imbalance.

Description

Technical Field

[0001] This utility model relates to the technical field of hydroponic plant devices, and in particular to an automatic nutrient solution circulation device for hydroponic cabinets. Background Technology

[0002] Hydroponics (soilless cultivation), as an advanced plant cultivation technology, has many significant advantages compared to traditional soil cultivation. Hydroponics offers higher water and fertilizer utilization rates, resulting in faster plant growth and higher yields. Nutrient solutions, as the source of nutrition for hydroponic plants, play a crucial role in their growth. However, the required nutrient solution ratios often differ at different growth stages. Existing hydroponic systems require manual intervention at each stage, necessitating the preparation and re-mixing of the nutrient solution, making management cumbersome. Furthermore, plants absorb water much faster than nutrients. Since existing hydroponic tanks are static nutrient solution systems, there is a problem of excessive salt accumulation in the solution, leading to increasingly high nutrient concentrations, root burn, and ultimately, hindering plant growth.

[0003] Therefore, the structure of the hydroponic nutrient solution supply device needs further improvement to solve the problem of difficulty in effectively and timely controlling the concentration of the nutrient solution. Utility Model Content

[0004] The purpose of this invention is to provide an automatic nutrient solution circulation device for hydroponic cabinets, which can automatically prepare nutrient solutions according to different growth stages of plants and automatically circulate the nutrient solutions, thereby realizing intelligent management of hydroponic plants.

[0005] To achieve the above-mentioned utility model objectives, this utility model provides an automatic nutrient solution circulation device for a hydroponic cabinet, including a circulation system cabinet and a hydroponic tank, wherein the circulation system cabinet is located below the hydroponic tank; the circulation system cabinet includes one or more mother liquor tanks, a mother liquor pump, a nutrient solution tank, and a control console;

[0006] An inlet pipe is connected between the mother liquor tank and the nutrient solution tank, and an electromagnetic valve is provided at the outlet of the mother liquor tank. The mother liquor pump is connected to the inlet pipe.

[0007] The nutrient solution tank is connected to an air inflation pipe, which is connected to an air pump and an aeration head. The aeration head extends into the nutrient solution tank.

[0008] The nutrient solution tank is connected to a water inlet pipe, and the water inlet pipe is equipped with a water pump;

[0009] The nutrient solution tank is connected to a nutrient solution output pipe and a nutrient solution return pipe. The nutrient solution output pipe and the nutrient solution return pipe are connected to the hydroponic tank. The nutrient solution output pipe is equipped with a nutrient solution pump.

[0010] The nutrient solution tank is equipped with an EC sensor;

[0011] The control console is connected to the mother liquor pump, the solenoid valve, the EC sensor, the air pump, the water inlet pump, and the nutrient solution pump via a bus.

[0012] Preferably, the inlet of the nutrient solution return pipe is equipped with filter cotton.

[0013] As a further improvement of the utility model, the nutrient solution tank is equipped with a pH sensor, and the nutrient solution tank is connected to two acid-base adjustment mechanisms. The acid-base adjustment mechanism includes a pH adjustment pump, an acid-base solution input pipe, and an acid-base solution tank. The pH adjustment pump and the pH sensor are both connected to the control console through the bus. The pH adjustment pump is connected to the acid-base solution input pipe, and the acid-base solution tank is connected to the nutrient solution tank through the acid-base solution input pipe.

[0014] As a further improvement of the utility model, the nutrient solution tank is equipped with a temperature sensor and a temperature control device, and both the temperature sensor and the temperature control device are connected to the control console via the bus.

[0015] This utility model discloses an automatic nutrient solution circulation device for hydroponic cabinets. Based on different growth stages of plants, taking lettuce as an example (germination, seedling, rapid growth, and maturity), the control panel (which can use a microcontroller) presets the approximate growth range for each stage. According to the corresponding ratio of mother liquor A and mother liquor B (mother liquor A contains macroelements such as nitrogen, phosphorus, and potassium, while mother liquor B contains microelements such as iron, magnesium, and calcium), the control panel opens the solenoid valve of the corresponding mother liquor tank, simultaneously running the mother liquor pump. This sequentially and quantitatively transfers the mother liquor from each tank to the nutrient solution tank through the inlet pipe. Simultaneously, the control panel activates the water inlet pump, adding a measured amount of water—essential for plant growth—to the tank through the inlet pipe. The control panel also activates the air pump, injecting an appropriate amount of oxygen into the nutrient solution tank through the air inlet pipe, generating numerous bubbles through the aerator head to mix the various mother liquors and water in the tank. The mixture is combined to form a nutrient solution. An EC sensor measures the total ion concentration of the nutrient solution and feeds the information back to the control console. The control console compares this to the preset concentration values ​​for the corresponding plant growth stage. If the actual measured concentration is not within the preset range, the control console performs analysis and calculations, increasing the volume of each stock solution or water according to the original ratio. If the actual measured concentration matches the preset value, the nutrient solution pump is controlled to transfer the prepared nutrient solution through the nutrient solution output pipe to the hydroponic tank. The nutrient solution in the tank returns to the nutrient solution tank by gravity through the nutrient solution return pipe, achieving nutrient solution circulation and realizing the goals of water and fertilizer conservation and creating a stable root environment for plants. The monitoring frequency can be set on the control console, and the EC sensor periodically measures the total ion concentration of the continuously circulating nutrient solution, and the stock solution or water volume is increased in a timely manner as needed to ensure that the nutrient solution concentration is always maintained within the appropriate range for plant growth. Each pump can be an existing metering pump, allowing for precise control of the corresponding single feed rate.

[0016] The advantages of this utility model's automatic nutrient solution circulation device for hydroponic cabinets compared to existing technologies are as follows:

[0017] (1) Feed each mother liquor tank sequentially to avoid feeding the mother liquor tank at the same time, and prevent the mother liquor from reacting in the inlet pipe, which would affect the composition of the nutrient solution;

[0018] (2) Setting up aeration heads can both oxygenate the nutrient solution, ensuring that the roots of hydroponic plants can carry out aerobic respiration and prevent root rot, and also use a large number of bubbles to quickly mix the nutrient solution in the nutrient solution tank evenly.

[0019] (3) The nutrient solution tank and the hydroponic tank are circulated with nutrient solution, and the concentration of nutrient solution is monitored regularly. The mother liquor and water are replenished in time to avoid imbalance of nutrient solution concentration, which may cause abnormal conditions such as root burn or malnutrition of plants. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of an automatic nutrient solution circulation device for a hydroponic cabinet according to the present invention. Detailed Implementation

[0021] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0022] like Figure 1 As shown, the present invention provides an automatic nutrient solution circulation device for a hydroponic cabinet, comprising a circulation system cabinet 1 and a hydroponic tank 9, wherein the circulation system cabinet 1 is located below the hydroponic tank 9; the circulation system cabinet 1 includes one or more mother liquor tanks 2, a mother liquor pump 3, a nutrient solution tank 4, and a control console 8;

[0023] An inlet pipe 31 is connected between the mother liquor tank 2 and the nutrient solution tank 4. A solenoid valve 21 is provided at the outlet of the mother liquor tank 2. The mother liquor pump 3 is connected to the inlet pipe 31.

[0024] The nutrient solution tank 4 is connected to an air inflation pipe 5, which is connected to an air pump 51 and an aeration head 52. The aeration head 52 extends into the nutrient solution tank 4.

[0025] The nutrient solution tank 4 is connected to a water inlet pipe 61, and the water inlet pipe 61 is equipped with a water pump 6;

[0026] The nutrient solution tank 4 is connected to a nutrient solution output pipe 71 and a nutrient solution return pipe 72. The nutrient solution output pipe 71 and the nutrient solution return pipe 72 are connected to the hydroponic tank 9. The nutrient solution output pipe 71 is equipped with a nutrient solution pump 7.

[0027] The nutrient solution tank 4 is equipped with an EC sensor (conductivity sensor) 41;

[0028] The control console 8 is connected to the mother liquor pump 3, solenoid valve 21, EC sensor 41, air pump 51, water inlet pump 6, and nutrient solution pump 7 via bus 81.

[0029] This utility model discloses an automatic nutrient solution circulation device for hydroponic cabinets. Based on different growth stages of plants, taking lettuce as an example (germination, seedling, rapid growth, and maturity), the control console 8 (which can be a microcontroller) presets the approximate growth range for each stage. According to the corresponding ratio of mother liquor A and mother liquor B (mother liquor A contains macroelements such as nitrogen, phosphorus, and potassium; mother liquor B contains microelements such as iron, magnesium, and calcium), the control console 8 opens the solenoid valve 21 of the corresponding mother liquor tank 2, simultaneously running the mother liquor pump 3 to sequentially and quantitatively transfer the mother liquor from each mother liquor tank 2 to the nutrient solution tank 4 through the inlet pipe 31. At the same time, the control console 8 opens the water inlet pump 6, adding a measured amount of water—essential for plant growth—to the tank through the water inlet pipe 61. The control console 8 also opens the air pump 51, injecting an appropriate amount of oxygen into the nutrient solution tank 4 through the air inlet pipe 5, generating a large number of bubbles through the aerator head 52, thus purifying the mother liquor and water in the tank. The mixture is prepared to form a nutrient solution. EC sensor 41 measures the total ion concentration of the nutrient solution and feeds this information back to console 8. Console 8 compares this concentration with preset values ​​for the corresponding plant growth stage. If the actual measured concentration is outside the preset range, console 8 performs analysis and calculations, increasing the volume of each stock solution or water according to the original ratio. If the actual measured concentration matches the preset value, the nutrient solution pump 7 is controlled to transfer the prepared nutrient solution through nutrient solution output pipe 71 to the hydroponic tank 9. The nutrient solution in the tank returns to the nutrient solution tank 4 via gravity through nutrient solution return pipe 72, achieving nutrient solution circulation and thus saving water and fertilizer while creating a stable root environment for the plants. A monitoring frequency can be set on console 8 to periodically measure the total ion concentration of the continuously circulating nutrient solution using EC sensor 41, and to promptly increase the volume of stock solution or water as needed to ensure the nutrient solution concentration remains within a suitable range for plant growth. Each pump can be an existing metering pump, allowing for precise control of the corresponding single-pass feed rate.

[0030] The nutrient solution in the hydroponic tank 9 returns to the nutrient solution tank 4 through the nutrient solution return pipe 72. The inlet of the nutrient solution return pipe 72 is equipped with a filter cotton 73 to filter out impurities such as fallen leaves in the tank, thus preventing blockage of the pipe or contamination of the nutrient solution in the nutrient solution tank 4.

[0031] Most plants have a very narrow optimal pH range for nutrient absorption, typically between 5.5 and 6.5. Within this slightly acidic range, the solubility of various nutrients is highest, making them most easily absorbed by plant roots. If the pH is too high (alkaline), trace elements such as iron and magnesium will precipitate, forming compounds that plants cannot absorb, causing new leaves to turn yellow. If the pH is too low (acidic), although trace elements are more easily dissolved, the overly acidic environment will damage plant roots, leading to root rot.

[0032] The nutrient solution tank 4 is equipped with a pH sensor (acidity and alkalinity sensor) 42. The nutrient solution tank 4 is connected to two acid and alkalinity adjustment mechanisms 45. The acid and alkalinity adjustment mechanism 45 includes a pH adjustment pump 46, an acid and alkalinity inlet pipe 47, and an acid and alkalinity tank 48. The pH adjustment pump 46 and the pH sensor 42 are both connected to the control console 8 through a bus 81. The pH adjustment pump 46 is connected to the acid and alkalinity inlet pipe 47, and the acid and alkalinity tank 48 is connected to the nutrient solution tank 4 through the acid and alkalinity inlet pipe 47.

[0033] pH sensor 42 measures the acidity or alkalinity of the nutrient solution by measuring the concentration of hydrogen ions in the solution. Two acid-base adjustment mechanisms 45 contain acid and alkali tanks 48, one containing acid (such as phosphoric acid) and the other containing alkali (such as potassium hydroxide). These tanks periodically measure the acidity or alkalinity of the nutrient solution using pH sensor 4. If the pH of the nutrient solution is too high, control console 8 analyzes and calculates the pH, and then uses pH adjustment pump 46 (which can be a metering pump) to quantitatively transfer the corresponding acid solution to the nutrient solution tank 4. If the pH of the nutrient solution is too low, control console 8 analyzes and calculates the pH, and then uses pH adjustment pump 46 (which can be a metering pump) to quantitatively transfer the corresponding alkali solution to the nutrient solution tank 4, until the pH of the nutrient solution returns to the preset standard range.

[0034] The nutrient solution tank 4 is equipped with a temperature sensor 43 and a temperature control device 44. Both the temperature sensor 43 and the temperature control device 44 are connected to the control console 8 via a bus 81.

[0035] Temperature sensor 43 is an existing component that converts heat energy into an electrical signal, transmitting the temperature information of the nutrient solution to control console 8. Taking lettuce as an example, the optimal growing temperature for lettuce is 18-22℃. Excessive nutrient solution temperature can damage the lettuce roots and even lead to disease. Temperature control device 44 can be an existing TEC semiconductor (semiconductor cooler), a solid-state heat pump device based on the Peltier effect. It is mainly composed of N-type and P-type bismuth telluride semiconductor materials, controlling the direction of heat flow through direct current to achieve heat absorption at the cold end and heat release at the hot end. The cooling or heating function can be switched by changing the current direction. Control console 8, based on the temperature information received from temperature sensor 43, controls the TEC semiconductor to regulate and control the temperature of the nutrient solution inside the chamber.

[0036] The preferred embodiments of this utility model have been described in detail above, but this utility model is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this utility model, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. An automatic nutrient solution circulation device for a hydroponic tank, comprising a circulation system cabinet and a hydroponic tank, wherein the circulation system cabinet is located below the hydroponic tank, characterized in that, The circulating system cabinet includes one or more mother liquor tanks, mother liquor pumps, nutrient solution tanks, and control consoles; An inlet pipe is connected between the mother liquor tank and the nutrient solution tank, and an electromagnetic valve is provided at the outlet of the mother liquor tank. The mother liquor pump is connected to the inlet pipe. The nutrient solution tank is connected to an air inflation pipe, which is connected to an air pump and an aeration head. The aeration head extends into the nutrient solution tank. The nutrient solution tank is connected to a water inlet pipe, and the water inlet pipe is equipped with a water pump; The nutrient solution tank is connected to a nutrient solution output pipe and a nutrient solution return pipe. The nutrient solution output pipe and the nutrient solution return pipe are connected to the hydroponic tank. The nutrient solution output pipe is equipped with a nutrient solution pump. The nutrient solution tank is equipped with an EC sensor; The control console is connected to the mother liquor pump, the solenoid valve, the EC sensor, the air pump, the water inlet pump, and the nutrient solution pump via a bus.

2. The automatic nutrient solution circulation device for a hydroponic cabinet as described in claim 1, characterized in that, The inlet of the nutrient solution return pipe is equipped with filter cotton.

3. The automatic nutrient solution circulation device for a hydroponic cabinet as described in claim 1, characterized in that, The nutrient solution tank is equipped with a pH sensor and is connected to two acid-base adjustment mechanisms. Each acid-base adjustment mechanism includes a pH adjustment pump, an acid-base solution input pipe, and an acid-base solution tank. The pH adjustment pump and the pH sensor are both connected to the control console via the bus. The pH adjustment pump is connected to the acid-base solution input pipe, and the acid-base solution tank is connected to the nutrient solution tank via the acid-base solution input pipe.

4. The automatic nutrient solution circulation device for a hydroponic cabinet as described in claim 1, characterized in that, The nutrient solution tank is equipped with a temperature sensor and a temperature control device. Both the temperature sensor and the temperature control device are connected to the control console via the bus.

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