Carbon dioxide increasing system for greenhouse

Abstract

The utility model provides a carbon dioxide increasing system for a greenhouse, and relates to the technical field of greenhouse equipment. The carbon dioxide increasing system for the greenhouse comprises a box body, a bearing piece, a heat exchange assembly and an air supply pipe. A heat preservation layer is arranged on the inner wall of the box body, an air inlet and an air outlet are formed in the two opposite sides of the box body respectively, and an air volume adjusting valve is installed on the air inlet. The bearing part is arranged in the box body and is used for bearing dry ice; the heat exchange assembly comprises an air guide pipe, a heat exchange pipe and a cold storage water pool. The air guide pipe is opposite to an air outlet of the box body, the heat exchange pipe is arranged in the air guide pipe, a circulating pipeline and a first pump body are arranged between the heat exchange pipe and the cold storage water pool, and the first pump body is used for forming circulation of water between the cold storage water pool and the heat exchange pipe; one end of the air supply pipe is communicated with the air guide pipe, and the other end is communicated with an air guide pipe or a cloth bag arranged in the greenhouse. According to the carbon dioxide increasing system for the greenhouse, the sublimation rate of dry ice can be adjusted, and the fertilizing amount and the fertilizing concentration can be adjusted.

Description

Technical Field

[0001] The utility model relates to the technical field of greenhouse equipment, and in particular to a carbon dioxide addition system for a greenhouse. Background Art

[0002] CO2 is the primary raw material for plant photosynthesis. While atmospheric CO2 concentrations typically range from 300-400 ppm, the optimal CO2 concentration for vegetable growth is above 1000 ppm. For greenhouse vegetables, during the winter and spring, due to the relatively enclosed conditions of greenhouses, CO2 concentrations often become insufficient after plants have been exposed to sunlight for a period of time. This limits normal photosynthesis and affects plant growth. Therefore, applying CO2 fertilizer to greenhouses is an important method for ensuring healthy crop growth and high yields.

[0003] Dry ice vaporization fertilization, as an emerging fertilization technology, has attracted widespread attention and application. Dry ice is solid carbon dioxide that converts directly from solid to gaseous at room temperature. The output carbon dioxide can be absorbed and utilized by crops. Currently, dry ice fertilization is performed by directly placing dry ice into the crop production environment to apply vapor fertilizer.

[0004] However, the above-mentioned dry ice fertilization method has the following defects: the natural sublimation rate of dry ice is low, there is no cold energy collection device, and the concentration and amount of fertilization are difficult to control manually. Utility Model Content

[0005] To this end, the present invention proposes a carbon dioxide dosing system for greenhouses to at least partially solve the technical problems mentioned in the background art, such as the low natural sublimation rate of dry ice fertilization, the lack of a cold energy collection device, and the difficulty in artificially controlling the concentration and amount of fertilization.

[0006] The technical solution of the utility model is as follows:

[0007] A greenhouse carbon dioxide dosing system, comprising:

[0008] A box body, wherein an insulation layer is provided on the inner wall of the box body, an air inlet and an air outlet are respectively provided on two opposite sides of the box body, and an air volume regulating valve is installed on the air inlet;

[0009] A carrier, disposed in the box and used for carrying dry ice;

[0010] A heat exchange assembly includes an air duct, a heat exchange pipe, and a cold water storage tank; the air duct is opposite to the air outlet of the box body, the heat exchange pipe is placed in the air duct, and a circulation pipeline and a first pump body are provided between the heat exchange pipe and the cold water storage tank, the first pump body is used to circulate water between the cold water storage tank and the heat exchange pipe;

[0011] An air supply pipe has one end connected to the air guide pipe and the other end connected to an air guide pipe or a cloth bag arranged in the greenhouse.

[0012] Furthermore, the box body includes a square shell with an opening at the top, and a cover body adapted to the shell body, and the cover body can block the opening or leave the opening open.

[0013] Furthermore, the supporting member is a frame provided in the shell; the frame includes a square bottom plate, and four side plates connected to the bottom plate and connected end to end in sequence, and a plurality of through holes are respectively opened on the bottom plate and the four side plates.

[0014] Furthermore, a first guide portion extending along the height direction of the box body is fixedly provided in the shell, and a second guide portion capable of guiding and sliding on the first guide portion is provided on the frame; and a screw rod is rotatably provided in the shell, and a thread screwed to the screw rod is constructed on the frame body.

[0015] Furthermore, it also includes a first bevel gear, a rotating shaft and a second bevel gear; the first bevel gear is coaxial with the screw and fixedly connected, the rotating shaft is rotatably provided on the box body, and has an operating end extending out of the box body; the second bevel gear is sleeved on the rotating shaft and meshes with the first bevel gear.

[0016] Furthermore, the thermal insulation layer is a graphite polystyrene board.

[0017] Furthermore, an exhaust fan is fixedly provided on one end of the air duct away from the box body, and the exhaust fan is used to transport the gas from the air duct to the air supply pipe.

[0018] The working principle and beneficial effects of the utility model are as follows:

[0019] The greenhouse carbon dioxide dosing system provided by this utility model places dry ice in a box, and provides an air inlet and an air outlet on opposite sides of the box. An air volume control valve is installed at the air inlet, and a heat exchanger is installed at the air outlet. The air volume control valve can be used to adjust the air intake, thereby adjusting the sublimation rate of the dry ice and the amount and concentration of fertilizer applied. Furthermore, the heat exchanger installed at the air outlet can collect and utilize the cold energy generated by the sublimation of the dry ice. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0021] Figure 1 A simplified connection diagram of the components of the greenhouse carbon dioxide dosing system provided by an embodiment of the utility model;

[0022] Figure 2 An exploded view of a box provided in an embodiment of the present utility model;

[0023] Figure 3 for Figure 2 A partial enlarged view of point A in the middle;

[0024] In the figure: 100, box body; 110, shell; 111, rotating shaft; 112, second bevel gear; 120, cover; 130, guide rod; 140, screw; 141, first bevel gear; 101, air outlet; 200, bearing member; 201, guide hole; 202, threaded hole; 300, heat exchange component; 310, heat exchange tube; 320, cold water storage tank; 330, first pump body; 400, air supply pipe; 500, air volume regulating valve; 600, air guide pipe; 700, exhaust fan. DETAILED DESCRIPTION

[0025] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] This embodiment provides a greenhouse carbon dioxide addition system, referring to Figure 1 and Figure 2 As shown, it includes a box body 100, a carrier 200, a heat exchange component 300 and an air supply pipe 400.

[0027] Among them, reference Figure 1 and Figure 2 As shown, the box 100 of this embodiment includes a square shell 110 with an open top. The box 100 also includes a cover 120 adapted to the shell 110. The cover 120 can block the open top of the shell 110, thereby reducing the escape of cold energy from the shell 110. The cover 120 can also be removed, thereby opening the open top of the shell 110 to facilitate the placement of dry ice into the shell 110.

[0028] In this embodiment, an insulation layer is provided on each inner wall of the shell 110 and the inner wall of the box body 100. By providing the insulation layer, the heat exchange between the inside and outside of the box body 100 can be further reduced, so that the cold energy generated by the sublimation of dry ice can be absorbed by the heat exchange component 300 as much as possible to avoid waste. It should be noted that the insulation layer is not shown in the drawings of this embodiment because it does not affect understanding.

[0029] In this embodiment, the above-mentioned thermal insulation layer is a graphite polystyrene board.

[0030] In some embodiments, the insulation layer may also be other insulation materials such as polyurethane foam.

[0031] In some embodiments, the box 100 may also be in other shapes such as a circle, and has the same working principle.

[0032] refer to Figure 2 As shown, in this embodiment, an air inlet is provided on one side of the housing 100, and an air volume control valve 500 is installed within the air inlet. This air volume control valve 500 can be used to adjust the air volume entering the housing 100, thereby adjusting the sublimation rate of the dry ice and the concentration and amount of fertilizer applied to the greenhouse. Specifically, the greater the air volume entering the housing 100, or the more high-temperature air entering the housing 100, the faster the sublimation rate of the dry ice. Conversely, the smaller the air volume entering the housing 100, the slower the sublimation rate of the dry ice.

[0033] It should be noted that the air volume regulating valve 500 can adopt an existing product, and its structure and working principle are not described in detail here.

[0034] refer to Figure 1 and Figure 2 As shown, an air duct 600 is fixedly provided on the box body 100 , and the air duct 600 is opposite to the air outlet 101 of the box body 100 , that is, the air duct 600 covers the air outlet 101 of the box body 100 , and the gas discharged from the air outlet 101 will pass through the air duct 600 .

[0035] In this embodiment, the aforementioned heat exchange assembly 300 includes a heat exchange tube 310 placed in the above-mentioned air duct 600, and the two ends of the heat exchange tube 310 are respectively connected to the cold water storage tank 320 through pipelines, and a first pump body 330 is provided between the heat exchange tube 310 and the cold water storage tank 320. The first pump body 330 can constitute the circulation of water between the cold water storage tank 320 and the heat exchange tube 310.

[0036] Based on the above structure, the water in the cold water storage tank 320 can flow into the heat exchange tube 310. The low-temperature gas discharged from the box 100 passes through the heat exchange tube 310 in the air duct 600 and exchanges heat with the water in the heat exchange tube 310. After lowering the water temperature in the heat exchange tube 310, the cold water can flow back to the cold water storage tank 320 and be stored in the cold water storage tank 320.

[0037] The cold water can be used when needed. For example, when the temperature of the greenhouse is high and needs to be cooled, the cold water can be circulated between the cold water storage tank 320 and the circulation pipeline arranged in the greenhouse, thereby lowering the temperature of the greenhouse.

[0038] refer to Figure 1As shown, the greenhouse carbon dioxide dosing system of this embodiment further includes an air supply pipe 400. One end of the air supply pipe 400 is connected to the air duct 600, and the other end is connected to the air duct or bag disposed within the greenhouse. In other words, the air supply pipe 400 can transport the carbon dioxide exhausted from the housing 100 to the air duct or bag disposed within the greenhouse, and release the carbon dioxide into the greenhouse through the air duct or bag.

[0039] It should be noted that the air duct or cloth bag arranged in the greenhouse can refer to the existing technology, and the connection between the air supply pipe 400 and the air duct 600, as well as the air supply pipe 400 and the air duct or cloth bag can refer to the existing technology. Its structure will not be described in detail here, and its specific structure is not shown in the drawings of this embodiment.

[0040] refer to Figure 1 As shown, in this embodiment, an exhaust fan 700 is fixedly installed on one end of the air duct 600 away from the box body 100 , and the exhaust fan 700 is used to transport gas from the air duct 600 to the air supply pipe 400 .

[0041] By providing the exhaust fan 700 , gas can be transported from the outside into the box body 100 and then from the box body 100 to the air ducts or bags.

[0042] refer to Figure 2 As shown, the carrier 200 of this embodiment is a frame provided in the shell 110; the frame includes a square bottom plate and four side plates connected to the bottom plate and connected end to end in sequence, and a plurality of through holes are respectively opened on the bottom plate and the four side plates.

[0043] In this embodiment, by providing the carrier 200 of the above structure, dry ice can be placed in the frame more conveniently, and external gas can contact the dry ice through the through holes on the frame to accelerate the sublimation rate of the dry ice.

[0044] In this embodiment, reference Figure 2 As shown, a first guide portion extending along the height direction of the box body 100 is fixedly provided in the shell body 110, and a second guide portion capable of guiding and sliding on the first guide portion is provided on the frame body; and a screw rod 140 is rotatably provided in the shell body 110, and a threaded hole 202 threadedly connected to the screw rod 140 is constructed on the frame body.

[0045] In this embodiment, by providing the aforementioned first guide portion, screw 140, and threaded hole 202, the screw 140 rotates, driving the frame to move along the length of the first guide portion, i.e., the height of the housing 100. This movement of the frame along the height of the housing 100 allows the dry ice within the frame to overlap with the air inlet at varying heights, resulting in different sublimation rates for the dry ice. Specifically, the higher the overlap between the dry ice and the air inlet, the higher the sublimation rate.

[0046] refer to Figure 2 As shown, the first guide portion of this embodiment is a plurality of guide rods 130 fixed in the housing 110 , and the second guide portion is a guide hole 201 constructed on the frame and capable of being sleeved on each guide rod 130 in a one-to-one correspondence.

[0047] In some embodiments, the first guide portion may also be a guide rail, and the second guide portion may be a slider fixed on the frame and capable of sliding on the guide rail.

[0048] refer to Figure 2 and Figure 3 As shown, the carbon dioxide addition system for a greenhouse in this embodiment also includes a first bevel gear 141, a rotating shaft 111 and a second bevel gear 112; the first bevel gear 141 is coaxial with the screw 140 and is fixedly connected, the rotating shaft 111 is rotatably provided on the box body 100, and has an operating end extending out of the box body 100; the second bevel gear 112 is sleeved on the rotating shaft 111 and meshes with the first bevel gear 141.

[0049] By setting the above structure, a worker can rotate the operating end of the rotating shaft 111 extending outside the box 100 on the outside of the shell 110 to adjust the height of the carrier 200 and adjust the sublimation rate of the dry ice.

[0050] Based on the above overall structure, when the greenhouse needs to supplement carbon dioxide, the overall workflow of the greenhouse carbon dioxide addition system of this embodiment is as follows:

[0051] Place dry ice in the box 100 and adjust the height of the carrier 200 according to the required sublimation rate of the dry ice;

[0052] Turn on the exhaust fan 700, allowing the hotter air outside to enter the box 100, increasing the sublimation rate of the dry ice. The dry ice then sublimates into gaseous carbon dioxide, which then flows through the air duct 600, the air supply duct 400, and the air duct or bag inside the greenhouse, and is released into the greenhouse to replenish the carbon dioxide. If necessary, adjust the air volume control valve 500 to further adjust the sublimation rate of the dry ice.

[0053] When the low-temperature gaseous carbon dioxide flows through the air duct 600, it exchanges heat with the water in the heat exchange tube 310 in the air duct 600, reducing the temperature of the water. The low-temperature water is stored in the cold water storage tank 320 for use.

[0054] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A greenhouse carbon dioxide dosing system, characterized in that: include: A box body (100), wherein an insulation layer is provided on the inner wall of the box body (100), an air inlet and an air outlet (101) are respectively provided on two opposite sides of the box body (100), and an air volume regulating valve (500) is installed on the air inlet; A carrier (200) is provided in the box (100) and is used to carry dry ice; A heat exchange assembly (300) comprises an air duct (600), a heat exchange tube (310), and a cold water storage tank (320); the air duct (600) is opposite to the air outlet (101) of the housing (100); the heat exchange tube (310) is disposed in the air duct (600); a circulation pipeline and a first pump body (330) are provided between the heat exchange tube (310) and the cold water storage tank (320); the first pump body (330) is used to circulate water between the cold water storage tank (320) and the heat exchange tube (310); The air supply pipe (400) has one end connected to the air guide pipe (600) and the other end connected to an air guide pipe or a cloth bag arranged in the greenhouse.

2. The greenhouse carbon dioxide addition system according to claim 1, characterized in that: The box (100) comprises a square shell (110) with an opening at the top, and a cover (120) adapted to the shell (110), wherein the cover (120) can block the opening or open the opening.

3. The greenhouse carbon dioxide addition system according to claim 2, characterized in that: The carrier (200) is a frame provided in the housing (110); the frame comprises a square bottom plate and four side plates connected to the bottom plate and connected end to end in sequence, and a plurality of through holes are respectively provided on the bottom plate and the four side plates.

4. The greenhouse carbon dioxide addition system according to claim 3, characterized in that: A first guide portion extending in the height direction of the box body (100) is fixedly provided in the shell (110), and a second guide portion capable of guiding and sliding on the first guide portion is provided on the frame; and a screw rod (140) is rotatably provided in the shell (110), and a thread screwed to the screw rod (140) is constructed on the frame.

5. The greenhouse carbon dioxide addition system according to claim 4, characterized in that: The invention also includes a first bevel gear (141), a rotating shaft (111), and a second bevel gear (112); the first bevel gear (141) is coaxial with and fixedly connected to the screw rod (140); the rotating shaft (111) is rotatably disposed on the housing (100) and has an operating end extending outside the housing (100); the second bevel gear (112) is sleeved on the rotating shaft (111) and meshes with the first bevel gear (141).

6. The greenhouse carbon dioxide addition system according to claim 1, characterized in that: The thermal insulation layer is a graphite polystyrene board.

7. The greenhouse carbon dioxide dosing system according to any one of claims 1 to 6, characterized in that: An exhaust fan (700) is fixedly provided on one end of the air guide pipe (600) away from the box body (100), and the exhaust fan (700) is used to transport gas from the air guide pipe (600) to the air supply pipe (400).

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