Fresh air system of seedling raising shed

Abstract

The utility model discloses a fresh air system of a seedling raising shed, which relates to the field of greenhouses and comprises a plurality of air ducts arranged on the seedling raising shed and a temperature controller, and the plurality of air ducts are positioned at different heights and are symmetrically distributed on the seedling raising shed; core plates are rotationally mounted in the multiple air ducts, and the air ducts can be opened or closed through the core plates; when the temperature in the seedling raising shed is higher or lower than the set temperature, the air duct is opened for ventilation and heat dissipation or closed for heat preservation; an air exhaust component is installed in one air cylinder and used for exhausting air to the outer side. When the temperature in the greenhouse reaches the temperature at which plants start to grow, the air duct is opened for ventilation, and ventilation of the greenhouse can be achieved while it is guaranteed that the temperature in the greenhouse is suitable for the growth of the plants. By arranging the air exhaust component, once the temperature is higher than the temperature suitable for plants, the air exhaust component in the air barrel works and can exhaust air to the outer side, meanwhile, the other air barrels feed air into the greenhouse, and fresh air circulation in the whole greenhouse can be achieved.

Description

Technical Field

[0001] The utility model relates to the field of greenhouses, in particular to a fresh air system for a seedling raising shed. Background Art

[0002] As an agricultural facility for cultivating plants, greenhouses can provide plants with a suitable growth environment in seasons that are not suitable for plant growth. When cultivating plants in a greenhouse, the temperature inside the greenhouse will vary due to the different light intensities throughout the day. Generally speaking, the light is strongest at noon and the temperature in the greenhouse is the highest, while there is no light at night and the temperature inside the greenhouse is the lowest.

[0003] When planting or cultivating crops in a greenhouse, since the crops have a suitable temperature for growth, take rice as an example: rice seedlings need to be raised before planting. Rice seedlings are generally raised in greenhouses, and the temperature needs to be strictly controlled. When the temperature is higher than 11°C, rice begins to grow, and when the temperature is 25°C, it is the best growth temperature for rice. Once the temperature is lower than 11°C or higher than 25°C, the growth of rice will be inhibited. Therefore, when planting crops in a greenhouse, the temperature inside the greenhouse needs to be strictly controlled so that the crops can reach the best growth state.

[0004] The commonly used method at present is to open ventilation holes in the greenhouse and use the ventilation holes to adjust the temperature inside the greenhouse. The ventilation holes use natural ventilation to adjust the temperature of the greenhouse, which will cause the temperature inside the greenhouse to respond slowly. When the temperature is too high, it is necessary to increase the number of ventilation holes or increase the opening of the ventilation holes, which is troublesome to adjust.

[0005] For example, the Chinese patent with the announcement number CN211210748U discloses a greenhouse temperature control system, which uses the fresh air inlet and outlet, temperature sensor, and PLC controller to adjust the greenhouse temperature. However, in this application, a heat circulation fan is installed in the fresh air inlet channel, which uses the blowing method to ventilate the inside of the greenhouse. Figure 1 It can be seen that the heights of the exhaust vents are all the same, and dead corners will be created when air flows. Utility Model Content

[0006] The utility model aims to provide a fresh air system for a seedling raising shed to solve the problems raised in the above-mentioned background technology.

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions: a fresh air system for a seedling shed, comprising a plurality of air ducts and a temperature controller arranged on the seedling shed, wherein the plurality of air ducts are at different heights and symmetrically distributed on the seedling shed;

[0008] A core plate is installed inside the multiple wind tubes, which can realize the opening or closing of the wind tubes; when the temperature in the seedling shed is higher or lower than the set temperature, the wind tubes are opened for ventilation and heat dissipation or closed for heat preservation;

[0009] An exhaust component is installed in one of the air ducts for exhausting air to the outside.

[0010] Preferably, an axial flow fan is installed inside one of the air ducts, and the axial flow fan can exhaust air to the outside when it is working.

[0011] Preferably, the installation height of the air duct of the axial flow fan is greater than the installation height of other air ducts.

[0012] Preferably, an air volume regulating valve electric mechanism is also fixedly installed on the outside of the air duct, and the air volume regulating valve electric mechanism is used to rotate with the core plate to realize the opening or closing of the air duct.

[0013] Preferably, a support shaft is fixedly mounted on the core plate, the support shaft is rotatably connected to the wind tube, and the support shaft is connected to an electric mechanism of the air volume regulating valve, and is used to drive the electric mechanism of the air volume regulating valve to drive the support shaft to rotate.

[0014] Preferably, the air volume regulating valve electric mechanism is also equipped with a plurality of warning lights of different colors.

[0015] Preferably, a temperature controller 2 is installed at the wind tube where the axial flow fan is set. When the temperature in the seedling shed is higher than the set temperature, the axial flow fan works and the wind tube exhausts air to the outside.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The utility model provides a plurality of wind ducts, core plates and temperature controllers, and the wind ducts are at different heights. When the temperature inside the greenhouse reaches the temperature at which plants begin to grow, the wind ducts are opened to achieve natural ventilation of the greenhouse. The natural ventilation volume is relatively small, and ventilation of the greenhouse can be achieved while ensuring that the temperature inside the greenhouse is suitable for plant growth.

[0018] Since one of the air ducts is equipped with an exhaust component to exhaust air to the outside, once the temperature is higher than the suitable temperature for the plants, the axial flow fan in the air duct will work to exhaust air to the outside, while the other air ducts will take in air inward, which can make the fresh air inside the entire greenhouse circulate better, realize the fresh air circulation inside the entire greenhouse, and make the ventilation of the greenhouse more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the overall structure diagram of the utility model;

[0020] Figure 2 This is a structural diagram of the air duct and core plate of the utility model;

[0021] Figure 3 It is a structural diagram of the air duct and axial flow fan of the utility model.

[0022] In the figure: 1. air duct; 2. core plate; 3. electric mechanism of air volume regulating valve; 4. axial flow fan; 5. warning light; 6. support shaft. DETAILED DESCRIPTION

[0023] 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.

[0024] As shown in FIG. 1 , this embodiment provides a fresh air system for a seedling shed, including three air ducts 1 arranged on the seedling shed, a temperature controller is also installed inside the seedling shed, and the three air ducts 1 are respectively installed at both ends of the seedling shed. Figure 1 As shown, two of the wind tubes 1 are located at one end of the seedling shed, and the positions of the two wind tubes 1 are set relatively low (their height is between 1-1.5 meters) and are placed symmetrically. Another wind tube 1 is installed at the other end of the seedling shed 1, and the position of the wind tube 1 is higher than the height of the other two wind tubes.

[0025] like Figure 2 As shown, a core plate 2 is installed inside the wind duct 1 located at a lower position, and a support shaft 6 is fixedly installed on the core plate 2, and the support shaft 6 is rotatably connected to the side wall of the wind duct 1. The core plate 2 is a circular structure, and the diameter of the core plate 2 is the same as the inner diameter of the wind duct 1. The core plate 2 is used to control the opening state of the wind duct 1. Thereby, the core plate 2 realizes the opening or closing of the wind duct 1; when the core plate 2 is in a vertical state, the core plate 2 blocks the wind duct 1, so that the wind duct 1 is in a closed state, and when the core plate 2 is rotated to an inclined position, the wind duct 1 is in an open state, and the outside wind can enter the wind duct 1. When the core plate 2 is in a horizontal state, the opening of the wind duct 1 is the largest, and the wind flow is also the largest.

[0026] The air volume regulating valve electric mechanism 3 is also fixedly installed on the outside of the air cylinder 1. The air volume regulating valve electric mechanism 3 is connected to the temperature controller, which is used to control the operation of the air volume regulating valve electric mechanism 3. The air volume regulating valve electric mechanism 3 is connected to the support shaft 6, which is used to rotate the core plate 2 and provide power to the core plate 2. The air volume regulating valve electric mechanism 3 uses a ZAJ-3 electric actuator with a voltage of 220V, a frequency of 50hz, a power of 6W, a torque of 14N.m, and a rotation angle of 0-90 degrees.

[0027] Taking rice seedlings as an example, the temperature at which rice seedlings begin to grow is 11°C, and the temperature of the temperature controller can be set to 11°C. When the temperature in the seedling shed is higher than the set 11 degrees Celsius, the temperature controller will control the air volume regulating valve electric mechanism 3 to work, and the air volume regulating valve electric mechanism 3 will rotate with the core plate 2 to open the air duct 1. All three air ducts are in the open state, and the external air can enter the seedling shed through the air duct 1 to achieve ventilation of the seedling shed.

[0028] When the temperature in the nursery shed is lower than the set temperature of 11 degrees Celsius, the temperature controller will control the air volume regulating valve electric mechanism 3 to work, and the air volume regulating valve electric mechanism 3 will rotate with the core plate 2 to close the air tube 1, so that the nursery shed is in a closed state.

[0029] The air volume regulating valve electric mechanism 3 is also equipped with three warning lights 5 of different colors: red, yellow and blue. The red light is connected to the power supply circuit of the air volume regulating valve electric mechanism 3, the yellow light is connected to the rotation circuit of the air volume regulating valve electric mechanism 3, and the blue light is connected to the closing circuit of the air volume regulating valve electric mechanism 3. When the air volume regulating valve electric mechanism 3 is powered on, the red light is on. When the air volume regulating valve electric mechanism 3 controls the core board 2 to open the air duct 1, the red light and the yellow light are on; when the air volume regulating valve electric mechanism 3 controls the core board 2 to close the air duct 1, the red light and the blue light are on; in this way, the working status of the air duct 1 can be remotely viewed.

[0030] When the three air ducts 1 are all opened, the three air ducts 1 are connected to the outside air, so that natural ventilation can be achieved.

[0031] like Figure 3 As shown, an axial flow fan 4 is installed inside the air duct 1 located at a high position, and the core plate 2 and the air volume regulating valve electric mechanism 3 are not installed on the air duct 1. If the core plate 2 and the air volume regulating valve electric mechanism 3 are installed, the length of the air duct 1 needs to be set relatively large to reserve enough space for the installation and rotation of the core plate 2 to prevent the core plate 2 from affecting the operation of the axial flow fan 4.

[0032] When the axial flow fan 4 is working, it can exhaust air to the outside. A temperature controller 2 is also installed on the seedling shed of the wind tube 1 located at a high place. The temperature controller 2 is connected to the axial flow fan 4. The temperature controller 2 is used to control the operation of the axial flow fan 4. The axial flow fan 4 serves as an exhaust component of the wind tube 1. The wind tube 1 located at a high place can exhaust air to the outside.

[0033] When raising rice seedlings, if the temperature in the seedling shed exceeds 25°C, the growth rate of the rice seedlings will decrease, so the temperature of the second temperature controller can be set to 25°C. When the temperature inside the seedling shed is higher than 25 degrees Celsius, the second temperature controller controls the axial flow fan 4 to work, and the wind tube 1 located at a high position accelerates the exhaust to the outside. The two wind tubes 1 located at a low position accelerate the air intake into the seedling shed, so that the temperature inside the seedling shed drops, and the temperature inside the seedling shed is controlled. And the three wind tubes can realize the ventilation of the seedling shed. And when the axial flow fan 4 is working, one of the wind tubes 1 exhausts air to the outside, and the other two wind tubes 1 take air in, which can realize the fresh air circulation inside the entire greenhouse. When the fresh air enters the inside of the seedling shed and is discharged to complete the cycle, it can take away more heat and has a better cooling effect.

[0034] This application is compared with a Chinese patent with announcement number CN211210748U, which discloses a greenhouse temperature control system. The patent uses air supply to supply fresh air to the greenhouse, which will lead to the problem of incomplete circulation inside the greenhouse. For example, the wind cannot circulate at the corners inside the greenhouse, and the fresh air circulation inside the entire greenhouse cannot be guaranteed. In addition, the air supply volume is relatively large, which will generate noise. In this embodiment, since an axial flow fan is installed in one of the wind tubes to exhaust air to the outside, once the temperature is higher than the suitable temperature for the plants, the axial flow fan in the wind tube works and can exhaust air to the outside, while the remaining wind tubes take in air to the inside, which can make the fresh air inside the entire greenhouse circulate better and have a better ventilation effect on the greenhouse.

[0035] In this embodiment, both temperature controllers are XH-W3001 microcomputer digital temperature controllers. Other types of temperature controllers may also be used as long as the control function can be achieved.

[0036] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fresh air system for a seedling shed, characterized by: It comprises a plurality of air ducts (1) and a temperature controller arranged on a seedling raising shed, wherein the plurality of air ducts (1) are located at different heights and are symmetrically distributed on the seedling raising shed; A core plate (2) is rotatably mounted inside the plurality of wind tubes (1), and the core plate (2) can realize the opening or closing of the wind tube (1); when the temperature in the seedling raising shed is higher or lower than the set temperature, the wind tube (1) is opened for ventilation and heat dissipation, or closed for heat preservation; An exhaust component is installed in one of the air ducts (1) for exhausting air to the outside.

2. A fresh air system for a seedling shed according to claim 1, characterized in that: An axial flow fan (4) is installed inside one of the air cylinders (1); when the axial flow fan (4) is in operation, it can exhaust air to the outside.

3. A fresh air system for a seedling shed according to claim 2, characterized in that: The installation height of the wind tube (1) of the axial flow fan (4) is greater than the installation height of other wind tubes (1).

4. A fresh air system for a seedling shed according to claim 1, characterized in that: An air volume regulating valve electric mechanism (3) is also fixedly mounted on the outside of the air duct (1), and the air volume regulating valve electric mechanism (3) is used to rotate with the core plate (2) to realize the opening or closing of the air duct (1).

5. A fresh air system for a seedling shed according to claim 2, characterized in that: A support shaft (6) is fixedly mounted on the core plate (2), the support shaft (6) is rotatably connected to the air cylinder (1), and the support shaft is connected to the air volume regulating valve electric mechanism (3) and is used to drive the air volume regulating valve electric mechanism (3) to drive the support shaft to rotate.

6. A fresh air system for a seedling shed according to claim 5, characterized in that: The air volume regulating valve electric mechanism (3) is also equipped with a plurality of warning lights (5) of different colors.

7. A fresh air system for a seedling shed according to claim 2, characterized in that: A second temperature controller is installed at the wind tube (1) where the axial flow fan (4) is arranged. When the temperature in the seedling raising shed is higher than the set temperature, the axial flow fan (4) starts working and the wind tube (1) exhausts air to the outside.

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