A device for preharvest nitric oxide preservation treatment of apricot fruits

Abstract

The utility model discloses a kind of apricot preharvest nitric oxide fresh-keeping treatment devices, including a greenhouse, at least one nitric oxide generator and several gas longitudinal pipelines, several supports are sequentially arranged in longitudinal direction in greenhouse, and the nitric oxide generator is arranged at one end inside the greenhouse;Each gas longitudinal pipeline is erected in greenhouse interior by several supports;Wherein, several gas diffusers are densely distributed on each gas longitudinal pipeline, and each gas diffuser is communicated with the outlet of nitric oxide generator by gas longitudinal pipeline.The apricot preharvest nitric oxide fresh-keeping treatment device disclosed by the utility model is suitable for greenhouse environment, and improves the processing efficiency and effect stability of apricot preharvest nitric oxide fumigation.

Description

Technical Field

[0001] This utility model relates to the field of agricultural product preservation technology, specifically to a pre-harvest nitric oxide preservation treatment device for apricots. Background Technology

[0002] As an important economic fruit in my country, post-harvest preservation of apricots is a core challenge for the industry's development. With the popularization of facility agriculture, the scale of greenhouse apricot cultivation has continued to increase, but post-harvest apricots are prone to problems such as rotting, softening, and color deterioration, severely impacting their commercial value. In recent years, pre-harvest field treatment techniques have gradually gained attention. Studies have shown that over 60% of post-harvest quality deterioration in apricots is closely related to latent infection by pathogens (such as Alternaria alternata and brown rot fungi of the stone fruit) during the pre-ripening field growth stage, and to imbalances in fruit respiratory metabolism. Nitric oxide, as a plant signaling molecule, can activate the fruit's peroxidase, phenylalanine ammonia-lyase, and other disease-fighting enzyme systems through gas fumigation during the fruit enlargement and color-changing stages. Furthermore, post-harvest treatment has shown that nitric oxide can regulate cell membrane permeability, enhance the fruit's antioxidant capacity, and significantly improve post-harvest quality and storage time from a physiological perspective. Compared to traditional post-harvest treatments, pre-harvest treatment technology using nitric oxide as a fumigant can more precisely regulate the key stages of fruit development, avoiding the passivity and limitations of post-harvest treatments. It represents a cutting-edge technological direction for improving the post-harvest quality of apricots.

[0003] In the field of agricultural product preservation, pre-harvest gas fumigation has become an emerging technology for improving the quality of fruits and vegetables. For example, in grape cultivation, pre-harvest fumigation with sulfur dioxide gas during the fruit ripening stage can effectively inhibit the growth of gray mold, reduce post-harvest rot, and extend shelf life. In apple cultivation, pre-harvest ozone fumigation can reduce the number of microorganisms on the fruit surface, induce the fruit to develop disease resistance mechanisms, and enhance the fruit's post-harvest antioxidant capacity. These practices demonstrate that pre-harvest gas fumigation can regulate the physiological and biochemical processes of fruits and vegetables from the source, laying a solid foundation for post-harvest preservation.

[0004] Currently, there are still many technical bottlenecks in the application of gas treatment devices for pre-harvest processing of fruits and vegetables such as apricots. Firstly, most existing gas distribution systems use a single-pipe opening method, which makes it difficult for the gas to diffuse evenly in the complex environment of a greenhouse, easily leading to significant concentration gradients and affecting the fumigation effect. Secondly, there is a lack of ventilation and replacement systems specifically adapted to the greenhouse environment. After fumigation, residual gases cannot be quickly discharged, which not only causes gas damage to the fruit but may also affect subsequent planting activities in the greenhouse. Furthermore, existing fumigation devices often only focus on suppressing pests and diseases during pre-harvest processing, neglecting the actual effect on post-harvest preservation. This failure to effectively connect pre-harvest processing with post-harvest preservation needs significantly reduces the role of pre-harvest processing in improving post-harvest quality. For example, the greenhouse fumigation device disclosed in Chinese utility model patent CN2737153Y is placed directly on the ground. The fumigation gas tends to accumulate near the ground, making it difficult to evenly diffuse throughout the space, thus affecting the fumigation effect. Furthermore, plant leaves near the device are easily damaged by excessively high gas concentrations, while the concentration may be insufficient at greater distances or higher elevations, resulting in uneven treatment. While the agricultural greenhouse fumigation pipe disclosed in utility model patent CN209089543U improves upon the uneven gas distribution problem of existing fumigation pipes and considers the uniformity of fumigation concentration to some extent, it lacks a residual gas removal device after fumigation, failing to effectively remove residual fumigation gas. This may adversely affect subsequent planting activities and crop growth in the greenhouse, indicating limitations in functional completeness.

[0005] In summary, the current apricot pre-harvest nitric oxide fumigation equipment is not suitable for greenhouse cultivation environments, resulting in low treatment efficiency and unstable effects. Utility Model Content

[0006] To address the aforementioned problems, the purpose of this utility model is to provide a pre-harvest nitric oxide preservation treatment device for apricots, which solves the problems of low treatment efficiency and unstable effects caused by the inability of current pre-harvest nitric oxide fumigation devices for apricots to adapt to greenhouse planting environments.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] This utility model discloses a pre-harvest nitric oxide preservation treatment device for apricots, including...

[0009] A large greenhouse, with several support frames arranged longitudinally inside.

[0010] At least one nitric oxide generator is located at one end of the interior of the greenhouse;

[0011] Several longitudinal gas pipes, each of which is supported by several of the aforementioned supports inside the greenhouse;

[0012] Each longitudinal gas pipe is densely equipped with several gas diffusers, and each gas diffuser is connected to the outlet of the nitric oxide generator through the longitudinal gas pipe.

[0013] Specifically, the apricot pre-harvest nitric oxide preservation treatment device includes a nitric oxide generator. The outlet of the nitric oxide generator is equipped with a connecting hose. Several longitudinal gas pipes share a single transverse gas main pipe. The connecting hose is connected to the several longitudinal gas pipes through the transverse gas main pipe.

[0014] Preferably, all gas diffusers are evenly arranged inside the greenhouse.

[0015] Furthermore, a bidirectional axial flow fan is installed at one end of the greenhouse interior away from the nitric oxide generator, and the nitric oxide generator and the bidirectional axial flow fan are respectively located at both ends of the greenhouse interior.

[0016] Preferably, at least one gas concentration detector is installed inside the greenhouse, and the gas concentration detector is a nitric oxide concentration detector.

[0017] Furthermore, the greenhouse is equipped with multiple gas concentration detectors, which are evenly distributed inside the greenhouse.

[0018] Furthermore, a flow regulating valve is provided at the inlet end of the gas transverse manifold.

[0019] Furthermore, it also includes a controller, and the controller can be set to the maximum and minimum allowable range of nitric oxide gas concentration;

[0020] The flow regulating valve is a solenoid valve;

[0021] The nitric oxide generator, the bidirectional axial flow fan, and all the gas concentration detectors are connected to the controller via wires.

[0022] When it is necessary to fumigate the apricots grown inside the greenhouse, the nitric oxide gas generated by the nitric oxide generator enters the horizontal gas main pipe through the connecting hose, then enters the vertical gas pipe through the horizontal gas main pipe, and finally is emitted through the gas diffuser.

[0023] During this period, the gas concentration detector monitors the nitrogen monoxide gas concentration inside the greenhouse in real time and transmits the current nitrogen monoxide gas concentration value at the collection point to the controller in real time. Once the controller determines that the nitrogen monoxide gas concentration is higher than the maximum allowable range, the controller adjusts the gas discharge of the gas diffuser through the flow regulating valve. Once the gas concentration detector detects that the nitrogen monoxide gas concentration inside the greenhouse has dropped to the minimum allowable range, the controller controls the bidirectional axial flow fan to shut down.

[0024] Furthermore, it also includes an exhaust gas tank, which is located outside the greenhouse and whose inlet is connected to the bidirectional axial flow fan for collecting exhaust gas after fumigation treatment.

[0025] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0026] (I) This utility model discloses a pre-harvest nitric oxide preservation treatment device for apricots, comprising a greenhouse, at least one nitric oxide generator, and several longitudinal gas pipelines. Several supports are arranged longitudinally inside the greenhouse, and the nitric oxide generator is located at one end of the greenhouse. Each longitudinal gas pipeline is supported by several supports inside the greenhouse. Several gas diffusers are densely distributed on each longitudinal gas pipeline, and each gas diffuser is connected to the outlet of the nitric oxide generator through a longitudinal gas pipeline. The pre-harvest nitric oxide preservation treatment device for apricots disclosed in this utility model is suitable for greenhouse environments and improves the treatment efficiency and stability of pre-harvest nitric oxide fumigation for apricots.

[0027] (II) This utility model discloses a pre-harvest nitric oxide preservation treatment device for apricots. All gas diffusers are evenly arranged inside the greenhouse. A longitudinal gas pipeline is constructed using a support frame and connected to a nitric oxide generator via a flexible hose. A gas concentration detector is used to detect the nitric oxide concentration, and a fan is used to promote the uniform diffusion of nitric oxide, thus performing pre-harvest nitric oxide fumigation treatment on the apricots. After fumigation, residual nitric oxide can be quickly removed through a ventilation system to prevent damage to the fruit from the gas. This device achieves uniform gas distribution and has a highly efficient residual gas removal function, solving the problems of uneven concentration and difficulty in removing residual gas in existing devices. It provides pre-harvest treatment technology support for improving the post-harvest storage quality of apricots. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the apricot pre-harvest nitric oxide preservation treatment device provided in Embodiment 1 of this utility model.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1-Greenhouse, 10-Frame;

[0031] 2 - Nitric oxide generator, 20 - Connecting hose;

[0032] 3-Gas longitudinal pipeline, 30-Gas transverse main pipeline;

[0033] 4-Gas diffuser;

[0034] 5-Bidirectional axial flow fan;

[0035] 6-Gas Concentration Detector. Detailed Implementation

[0036] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0037] To address the problem of low efficiency and unstable effects caused by the incompatibility of current apricot pre-harvest nitric oxide fumigation devices with greenhouse cultivation environments, this invention discloses a pre-harvest nitric oxide preservation treatment device for apricots. The device includes a greenhouse, at least one nitric oxide generator, and several longitudinal gas pipes. Several supports are arranged longitudinally within the greenhouse, and the nitric oxide generator is located at one end of the greenhouse. Each longitudinal gas pipe is supported by several supports within the greenhouse. Several gas diffusers are densely distributed along each longitudinal gas pipe, and each gas diffuser is connected to the outlet of the nitric oxide generator via a longitudinal gas pipe. This pre-harvest nitric oxide preservation treatment device for apricots is suitable for greenhouse environments and improves the efficiency and stability of pre-harvest nitric oxide fumigation for apricots.

[0038] Example 1: A pre-harvest nitric oxide preservation treatment device for apricots

[0039] Embodiment 1 of this utility model provides a pre-harvest nitric oxide preservation treatment device for apricots, and its structure will be described in detail below with reference to the accompanying drawings.

[0040] refer to Figure 1 The apricot pre-harvest nitric oxide preservation treatment device includes:

[0041] A large greenhouse 1 has several support frames 10 arranged longitudinally inside it.

[0042] At least one nitric oxide generator 2 is disposed at one end inside the greenhouse 1;

[0043] Several longitudinal gas pipes 3 are installed inside the greenhouse 1 via several of the aforementioned supports 10;

[0044] Each longitudinal gas pipe 3 is densely covered with several gas diffusers 4, and each gas diffuser 4 is connected to the outlet of the nitric oxide generator 2 through the longitudinal gas pipe 3.

[0045] Specifically, the apricot pre-harvest nitric oxide preservation treatment device includes a nitric oxide generator 2. The outlet of the nitric oxide generator 2 is equipped with a connecting hose 20. Several longitudinal gas pipes 3 share a single transverse gas main pipe 30. The connecting hose 20 is connected to several longitudinal gas pipes 3 through the transverse gas main pipe 30.

[0046] Preferably, all gas diffusers 4 are evenly arranged inside the greenhouse 1.

[0047] In order to direct the flow of nitric oxide gas generated by nitric oxide generator 2, a bidirectional axial flow fan 5 is provided at one end of the greenhouse 1, away from the nitric oxide generator 2. The nitric oxide generator 2 and the bidirectional axial flow fan 5 are respectively located at both ends of the greenhouse 1.

[0048] The bidirectional axial flow fan 5 is used to draw in the gas inside the greenhouse 1, causing the gas inside the greenhouse 1 to flow in a direction away from the nitric oxide generator 2.

[0049] To detect the nitric oxide gas content inside greenhouse 1, at least one gas concentration detector 6 is installed inside greenhouse 1 for detecting the nitric oxide gas content. Specifically, the gas concentration detector 6 is a nitric oxide concentration detector.

[0050] To improve the accuracy of gas concentration detection, multiple gas concentration detectors 6 are installed inside greenhouse 1, and these detectors 6 are evenly distributed inside greenhouse 1.

[0051] In order to regulate the gas discharge of the gas diffuser 4, a flow regulating valve is provided at the inlet end of the gas transverse manifold 30.

[0052] To improve automatic control capabilities, the apricot pre-harvest nitric oxide preservation treatment device also includes a controller, and the controller is configured with the maximum and minimum allowable range of nitric oxide gas concentration.

[0053] The flow regulating valve is a solenoid valve;

[0054] The nitric oxide generator 2, the bidirectional axial flow fan 5, and all the gas concentration detectors 6 are connected to the controller via wires.

[0055] When it is necessary to fumigate the apricots planted inside the greenhouse 1, the nitric oxide gas generated by the nitric oxide generator 2 enters the horizontal gas main duct 30 through the connecting hose 20, then enters the vertical gas pipe 3 through the horizontal gas main duct 30, and finally is emitted through the gas diffuser 4.

[0056] During this period, the gas concentration detector 6 monitors the nitrogen monoxide gas concentration inside greenhouse 1 in real time and transmits the current nitrogen monoxide gas concentration value at the collection point to the controller in real time. Once the controller determines that the nitrogen monoxide gas concentration is higher than the maximum allowable range, the controller adjusts the gas discharge of the gas diffuser 4 through the flow regulating valve. Once the gas concentration detector 6 detects that the nitrogen monoxide gas concentration inside greenhouse 1 drops to the minimum allowable range, such as 0.1 ppm, the controller controls the bidirectional axial flow fan 5 to shut down.

[0057] Furthermore, the apricot pre-harvest nitric oxide preservation treatment device also includes an exhaust gas tank, which is located outside the greenhouse 1, and the inlet of the exhaust gas tank is connected to the bidirectional axial flow fan 5 to collect the exhaust gas after the fumigation treatment is completed.

[0058] Example 2: Method of using a pre-harvest nitric oxide preservation device for apricots

[0059] Embodiment 2 of this utility model provides a method for using the apricot pre-harvest nitric oxide preservation treatment device, which adopts the apricot pre-harvest nitric oxide preservation treatment device of Embodiment 1. The method of use includes the following steps:

[0060] Step 1: Fix the longitudinal gas pipe 3 to the bracket 10, and then evenly install the gas diffuser 4 on the longitudinal gas pipe 3;

[0061] Step 2: Connect one end of the connecting hose 20 to the nitric oxide generator 2, and the other end to the gas horizontal main pipe 30. Then connect the gas horizontal main pipe 30 to several gas vertical pipes 3.

[0062] Step 3: Fumigation treatment, the specific steps are as follows:

[0063] Start nitric oxide generator 2;

[0064] Turn on the bidirectional axial flow fan 5 to draw in the gas inside greenhouse 1;

[0065] The nitric oxide gas generated by the nitric oxide generator 2 enters the horizontal gas manifold 30 through the connecting hose 20, then enters the vertical gas pipe 3 through the horizontal gas manifold 30, and finally is emitted through the gas diffuser 4.

[0066] During this period, the gas concentration detector 6 monitors the nitrogen monoxide gas concentration inside the greenhouse 1 in real time and transmits the current nitrogen monoxide gas concentration value at the collection point to the controller in real time. Once the controller determines that the nitrogen monoxide gas concentration is higher than the limit value, the controller adjusts the gas discharge of the gas diffuser 4 through the flow regulating valve. Once the gas concentration detector 6 detects that the nitrogen monoxide gas concentration inside the greenhouse 1 is lower than 0.1 ppm, the controller controls the bidirectional axial flow fan 5 to shut down.

[0067] Step 4: Post-fumigation treatment, including the following steps:

[0068] Turn off the nitric oxide generator 2 and turn on the bidirectional axial flow fan 5 to extract the nitric oxide gas inside the greenhouse 1.

[0069] The extracted gas is collected in the exhaust gas tank.

[0070] Embodiment 2 of this utility model provides a method for using a pre-harvest nitric oxide preservation treatment device for apricots. By optimizing gas diffusion, residual gas is quickly removed after fumigation treatment to avoid damage to the fruit from the gas. This solves the problems of low processing efficiency and unstable effect in the prior art, and lays the foundation for high-quality post-harvest preservation of apricots from the pre-harvest stage.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A device for pre-harvest nitric oxide preservation treatment of apricots, characterized in that, include A large greenhouse (1) has several supports (10) arranged longitudinally inside it. At least one nitric oxide generator (2) is disposed at one end inside the greenhouse (1); Several longitudinal gas pipes (3) are installed inside the greenhouse (1) via several supports (10); Each gas longitudinal pipe (3) is densely covered with several gas diffusers (4), and each gas diffuser (4) is connected to the outlet of the nitric oxide generator (2) through the gas longitudinal pipe (3).

2. The apricot pre-harvest nitric oxide preservation treatment device according to claim 1, characterized in that, Includes a nitric oxide generator (2). The outlet of the nitric oxide generator (2) is equipped with a connecting hose (20), and several longitudinal gas pipes (3) share a single transverse gas main pipe (30). The connecting hose (20) is connected to several longitudinal gas pipes (3) through the transverse gas main pipe (30).

3. The apricot pre-harvest nitric oxide preservation treatment device according to claim 2, characterized in that, All gas diffusers (4) are evenly arranged inside the greenhouse (1).

4. The apricot pre-harvest nitric oxide preservation treatment device according to claim 3, characterized in that, A bidirectional axial flow fan (5) is installed at one end of the greenhouse (1) away from the nitric oxide generator (2). The nitric oxide generator (2) and the bidirectional axial flow fan (5) are respectively located at both ends inside the greenhouse (1).

5. The apricot pre-harvest nitric oxide preservation treatment device according to claim 4, characterized in that, The greenhouse (1) is equipped with at least one gas concentration detector (6), which is a nitric oxide concentration detector.

6. The apricot pre-harvest nitric oxide preservation treatment device according to claim 5, characterized in that, The greenhouse (1) is equipped with multiple gas concentration detectors (6), which are evenly distributed inside the greenhouse (1).

7. The apricot pre-harvest nitric oxide preservation treatment device according to claim 6, characterized in that, The gas inlet of the gas transverse manifold (30) is equipped with a flow regulating valve.

8. The apricot pre-harvest nitric oxide preservation treatment device according to claim 7, characterized in that, It also includes a controller, on which the maximum and minimum allowable ranges for nitric oxide gas concentration can be set; The flow regulating valve is a solenoid valve; The nitric oxide generator (2), the bidirectional axial flow fan (5), and all the gas concentration detectors (6) are connected to the controller via wires. When it is necessary to fumigate the apricots planted inside the greenhouse (1), the nitric oxide gas generated by the nitric oxide generator (2) enters the gas horizontal main pipe (30) through the connecting hose (20), then enters the gas vertical pipe (3) through the gas horizontal main pipe (30), and finally is emitted through the gas diffuser (4). During this period, the gas concentration detector (6) monitors the nitrogen monoxide gas concentration inside the greenhouse (1) in real time and transmits the current nitrogen monoxide gas concentration value at the collection point to the controller in real time. Once the controller determines that the nitrogen monoxide gas concentration is higher than the maximum allowable range of nitrogen monoxide gas concentration, the controller adjusts the gas discharge of the gas diffuser (4) through the flow regulating valve. Once the gas concentration detector (6) detects that the nitrogen monoxide gas concentration inside the greenhouse (1) drops to the minimum allowable range of nitrogen monoxide gas concentration, the controller controls the bidirectional axial flow fan (5) to shut down.

9. The apricot pre-harvest nitric oxide preservation treatment device according to claim 4, characterized in that, It also includes an exhaust gas tank, which is located outside the greenhouse (1) and the inlet of the exhaust gas tank is connected to the bidirectional axial flow fan (5) for collecting exhaust gas after the fumigation treatment is completed.

Images