A fumigation device for the storage of chayote tubers
Patent Information
- Application Number
- CN202521547377.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-23
- Publication Date
- 2026-09-04
- Estimated Expiration
- 2035-07-23
AI Technical Summary
然而其在采后贮藏过程中普遍存在贮藏期短、腐烂率高、营养物质流失严重等问题，影响贮藏稳定性和丧失商品价值
[0011] This invention offers the following advantages: The fumigation and preservation device for storing root-type chayote tubers provided by this invention, through its integrated design and preservative fumigation treatment, achieves standardization and controllability in the preservative treatment process for tuber crops, ensuring full coverage of the preservative gas within the chamber. Furthermore, it reduces weight loss, maintains high sensory quality during storage, slows the loss of nutrients such as starch, reduces oxidative stress during storage, stabilizes antioxidant enzyme activity, and extends the storage period. The device has a relatively simple structure and is easy to operate, making it suitable for storing and preserving root-type chayote tubers in fields, cooperatives, and other locations. It is also suitable for storing and preserving other tuber crops such as sweet potatoes, potatoes, and yams.
Smart Images
Figure CN224710420U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of agricultural product storage and preservation technology, specifically to a fumigation and preservation device for storing root chayote tubers. Background Technology
[0002] Chayote tubers are rich in starch, soluble sugars, ascorbic acid, polyphenols, and minerals such as zinc and selenium, giving them high nutritional value. However, post-harvest storage often suffers from short shelf life, high rot rates, and significant nutrient loss, affecting storage stability and diminishing commercial value. Traditional storage methods rely heavily on low temperatures or ventilated chambers, lacking effective regulation of post-harvest physiological metabolism. Furthermore, chemical preservation is cumbersome, requires extensive preparation, and its effectiveness is highly dependent on environmental factors. While volatile biological preservatives such as 1-methylcyclopropene and carvone can effectively slow down physiological metabolism, their effectiveness is limited by gas release uniformity, temperature and humidity control, and airtightness. Existing storage devices, such as simple fumigation boxes and ordinary storage warehouses, lack integrated storage and fumigation structures, integrated temperature and humidity control, and uniform gas circulation designs. Therefore, there is an urgent need for a storage device and a method for using preservatives that can be conveniently used for fumigation treatment with preservatives under normal or controlled temperature conditions to improve the storage quality of root chayote and delay physiological deterioration. Utility Model Content
[0003] To solve the above-mentioned technical problems, this utility model provides a fumigation and preservation device for storing root chayote tubers.
[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A fumigation and preservation device for storing root chayote tubers, characterized in that it includes: A storage container having a sealed door, the edge of which is provided with a sealing ring; A preservative release module is installed on the upper inner wall of the storage container. The preservative release module is equipped with a medicine tray and an air supply unit. The air supply unit is connected to the control module. The temperature and humidity control unit includes a temperature and humidity sensor and a microprocessor controller, wherein the microprocessor controller is electrically connected to a heating unit, a cooling unit, a humidification device, or a dehumidification module; The gas circulation system includes a circulation fan, which is located at the central axis of the bottom of the storage container and is linked to the temperature and humidity sensor.
[0005] Furthermore, the preservative release module is installed via threads or slide rails, its agent tray is configured to hold volatile solid or liquid preservatives, and the air supply unit is configured to drive the gas to diffuse from top to bottom at a fixed time and speed.
[0006] Furthermore, it also includes a detachable mesh tray, which is arranged in layers inside the container to support crops and promote gas permeation and liquid infiltration.
[0007] Furthermore, the storage container is provided with a humidity control groove at the bottom for placing desiccant or humidity-regulating material.
[0008] Furthermore, the storage container is provided with an openable and closable ventilation port on the top for gas discharge during the forced ventilation stage.
[0009] Furthermore, it also includes a control panel, which is electrically connected to the temperature and humidity control unit, the preservative release module, and the gas circulation system, and can realize one-button start and switching between manual and automatic control modes.
[0010] Furthermore, it also includes a circulating fan, which is located at the central axis of the bottom of the storage container and is linked to the temperature and humidity sensor.
[0011] This invention offers the following advantages: The fumigation and preservation device for storing root-type chayote tubers provided by this invention, through its integrated design and preservative fumigation treatment, achieves standardization and controllability in the preservative treatment process for tuber crops, ensuring full coverage of the preservative gas within the chamber. Furthermore, it reduces weight loss, maintains high sensory quality during storage, slows the loss of nutrients such as starch, reduces oxidative stress during storage, stabilizes antioxidant enzyme activity, and extends the storage period. The device has a relatively simple structure and is easy to operate, making it suitable for storing and preserving root-type chayote tubers in fields, cooperatives, and other locations. It is also suitable for storing and preserving other tuber crops such as sweet potatoes, potatoes, and yams. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 1 The reference numerals in the attached figures represent: 1-ventilation regulating port, 2-preservative release module; 3-storage container, 4-sealed door, 5-temperature and humidity control unit, 6-potato crop, 7-removable crop tray, 8-humidity control trough, 9-circulating fan, 10-control panel. Detailed Implementation
[0013] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.
[0014] like Figure 1 As shown, a fumigation and preservation device for storing root chayote tubers includes: The storage container 3 has a sealing door 4 with a sealing ring on its edge. The storage container 3 has a cuboid or cylindrical structure and is made of corrosion-resistant stainless steel or food-grade PP plastic. The sidewall thickness of the container is not less than 5mm to ensure heat preservation performance. The sealing door 4 is located on the front of the container, and a nitrile rubber sealing ring with a circular cross-section is embedded in the edge of the door. When closed, the door is pressed and sealed by a snap-fit structure to ensure that the gas leakage rate during the fumigation stage is less than 0.5% / h.
[0015] The preservative release module 2 is installed on the upper inner wall of the storage container 3. The preservative release module 2 contains a reagent tray and an air supply unit, which is connected to the control module. The preservative release module 2 is installed on the upper part of the inner wall of the container (at 1 / 4 of the height from the top) via a pre-set threaded interface or sliding rail snap-fit structure on the side wall. The reagent tray inside the module is made of polytetrafluoroethylene and has a 2-3mm diameter guide hole at the bottom, suitable for solid preservatives (such as 1-methylcyclopropene powder) or liquid preservatives (such as carvone solution). The air supply unit uses a 12V DC small fan (3-5W power), which is controlled by the module to start for 10 minutes every hour (1500r / min) in a timed and speed-controlled mode, driving the preservative gas to diffuse downwards along the side wall of the container.
[0016] The temperature and humidity control unit 5 includes a temperature and humidity sensor and a microprocessor controller. The microprocessor controller is electrically connected to the heating unit, the cooling unit, the humidification device, or the dehumidification module. Specifically, the temperature and humidity control unit includes an SHT30 digital temperature and humidity sensor (accuracy ±0.3℃, ±2%RH) installed on the middle side wall of the container. The microprocessor controller uses an STM32 series microcontroller and is connected to a 100WPTC heating element, a 60W semiconductor cooling element, an ultrasonic humidification module (humidification capacity 300ml / h), and a condensation dehumidification device to achieve a temperature range of 0-30℃ and a humidity range of 50-95%.
[0017] The gas circulation system includes a circulation fan 9, which is located at the bottom centerline of the storage container 3 and is linked to the temperature and humidity sensor.
[0018] In addition, a detachable mesh tray 7 is included. This detachable mesh tray 7 is arranged in layers inside the container to support crops and promote gas permeation and liquid infiltration. The detachable mesh tray 7 is made of food-grade polyethylene, with mesh holes of 8-10mm in diameter evenly distributed on the bottom and sides, with a hole spacing of 20mm × 20mm. The trays are arranged in layers (2-3 layers are possible) through stepped grooves on the inner wall of the container, with each layer being 30-40cm high. The distance between adjacent trays is no less than 15cm to ensure gas flow. The tray edges are equipped with anti-slip flanges for easy removal and loading.
[0019] The storage container 3 has a humidity control tank 8 at the bottom for placing desiccant or humidity-regulating materials. The humidity control tank 8 is located at the bottom of the container and is arranged in a ring around the circulating fan 9. The tank depth is 5-8cm and the volume is 0.5-1L. Anhydrous calcium chloride (dehumidifier) or saturated salt solution (humidifier, such as potassium sulfate solution, can maintain a relative humidity of 90%) can be added according to the ambient humidity.
[0020] The circulating fan 9 is an axial fan with a diameter of 10-15cm and a power of 10-15W, fixed at the center axis of the bottom of the container. The fan is linked to the temperature and humidity sensor through the control unit. It automatically starts when the temperature and humidity deviation exceeds ±2℃ or ±5%, and the wind speed is adjustable (800-2000r / min), forming an upward airflow circulation.
[0021] The storage container 3 is provided with an openable and closable ventilation opening 1 at the top for gas discharge during the forced ventilation stage. The ventilation opening 1 is located at the center of the top of the container and adopts a circular louver structure with a diameter of 50mm. It can be opened and closed by a manual knob or an electric push rod. The opening angle is adjustable (0-90°) and the maximum ventilation volume is not less than 2 times the container volume / h.
[0022] The device also includes a control panel 10, which is electrically connected to the temperature and humidity control unit 5, the preservative release module 2, and the gas circulation system. It allows for one-button start and switching between manual and automatic control modes. The control panel 10 is embedded in the outer wall of the container and features a 4.3-inch touchscreen that displays real-time temperature and humidity, fumigation countdown, fan status, and other parameters. It also supports manual input of temperature and humidity thresholds (e.g., 10-15℃, 70-90%RH for storage) and fumigation duration (default 24h). It has an "automatic mode" (runs according to a preset program) and a "manual mode" (individually controls each module) switching function, and is equipped with an emergency stop button.
[0023] The device also includes a circulating fan 9, which is located at the bottom centerline of the storage container 3 and is linked to the temperature and humidity sensor. The circulating fan 9 is an axial fan with a diameter of 10-15cm and a power of 10-15W, fixed at the bottom centerline of the container. The fan and the temperature and humidity sensor are linked through a control unit. It automatically starts when a temperature and humidity deviation exceeding ±2℃ or ±5% is detected. The fan speed is adjustable (800-2000r / min), forming an upward airflow circulation.
[0024] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A fumigation and preservation device for storing root chayote tubers, characterized in that, include: A storage container (3) having a sealing door (4) with a sealing ring on the edge of the sealing door (4); The preservative release module (2) is installed on the upper inner wall of the storage container (3). The preservative release module (2) is equipped with a medicine tray and an air supply unit. The air supply unit is connected to the control template. The preservative release module (2) is installed by thread or slide rail buckle. Its medicine tray is configured to hold volatile solid or liquid preservatives. The air supply unit is configured to drive the gas to diffuse from top to bottom at a fixed time and speed. The temperature and humidity control unit (5) includes a temperature and humidity sensor and a microprocessor controller, wherein the microprocessor controller is electrically connected to a heating unit, a cooling unit, a humidification device or a dehumidification module; The gas circulation system includes a circulation fan (9), which is located at the bottom centerline of the storage container (3) and is linked to the temperature and humidity sensor. It also includes a detachable mesh tray (7), which is arranged in layers inside the container to support crops and promote gas permeation and liquid infiltration; It also includes a circulating fan (9), which is located at the bottom centerline of the storage container (3) and is linked to the temperature and humidity sensor.
2. The fumigation and preservation device for storing root chayote tubers according to claim 1, characterized in that, The storage container (3) has a humidity control groove (8) at the bottom for placing desiccant or humidity-regulating material.
3. The fumigation and preservation device for storing root chayote tubers according to claim 2, characterized in that, The storage container (3) is provided with an openable and closable ventilation port (1) on the top for gas discharge during the forced ventilation stage.
4. The fumigation and preservation device for storing root chayote tubers according to claim 1, characterized in that, It also includes a control panel (10), which is electrically connected to the temperature and humidity control unit (5), the preservative release module (2), and the gas circulation system, and can realize one-button start-up and manual or automatic control mode switching.