A device for rapid drying of fresh fruit surface using low-temperature airflow
The low-temperature airflow rapid drying device uses spiral pipes and air knife nozzles to form a uniform air curtain, which solves the problem of hot air drying damaging the fruit peel, achieving rapid drying without heat damage and maintaining the quality of the fruit.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGXI YISHUXIA FRUIT CO LTD
- Filing Date
- 2025-08-22
- Publication Date
- 2026-07-03
AI Technical Summary
Existing hot air drying methods damage fruit peel cells, leading to fruit spoilage, weight loss, and loss of nutrients.
The device employs a low-temperature airflow rapid drying system, which uses an air compressor to generate a low-temperature airflow. This airflow is then passed through a spiral pipe and an air knife nozzle to form a uniform high-energy air curtain, instantly dispersing the water film on the surface of the fruit. Combined with a moisture sensor, it achieves adaptive drying.
It quickly dries the surface moisture of fresh fruit, avoids heat damage, maintains fruit quality, and prevents spoilage and loss of nutrients.
Smart Images
Figure CN224455343U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of fruit processing technology, and specifically relates to a device for rapid drying of fresh fruit surface by low-temperature airflow. Background Technology
[0002] Fresh fruits (such as citrus, apples, pears, kiwis, etc.) will have a lot of water attached to their surface after soaking for ripening, washing or sterilization.
[0003] Currently, hot air drying is a common method for drying fresh fruit, which involves using hot air at 50-70℃ and a conveyor belt to dry the fruit in a hot air blowing area. However, this method has the following problems: hot air contact can damage fruit peel cells, accelerate fruit spoilage, and may lead to fruit weight loss, poor color, and loss of nutrients. Utility Model Content
[0004] The purpose of this invention is to provide a low-temperature airflow rapid drying device for fresh fruit, which solves the problems of existing hot air drying methods that damage fruit peel cells, accelerate fruit spoilage, and may lead to fruit weight loss, color deterioration, and loss of nutrients.
[0005] The specific technical solution is as follows:
[0006] A device for rapid drying of fresh fruit surface using low-temperature airflow includes:
[0007] A frame, on which a housing is mounted, and the housing has a through passage that extends through both ends of the housing;
[0008] The feed drain conveyor belt passes through the through-passage;
[0009] An air compressor is installed inside or outside the frame, and the air outlet of the air compressor is connected to a vortex tube.
[0010] The spiral pipe has one end connected to the vortex pipe and is wrapped around the outside of the feed dewatering conveyor belt. The spiral pipe has a connection port and the other end of the spiral pipe is closed.
[0011] Air knife nozzle, air knife nozzle connected to the connector.
[0012] Preferably, the frame includes four support columns and four crossbeams. The four support columns are arranged in a rectangular pattern, and the four crossbeams are connected in one step to form a rectangular frame. The four corners of the rectangular frame are fixedly connected to the top of the four support columns respectively. The housing is installed on the top of the rectangular frame.
[0013] Preferably, a stabilizing plate is connected to the bottom of each support column.
[0014] Preferably, the top of the box is equipped with an opening and closing door.
[0015] Preferably, the feeding and draining conveyor belt includes a drive motor, a transmission component, a chain, and a support plate. The drive motor is installed on the outside of the rectangular frame, and the output shaft of the drive motor is connected to the transmission component. There are two support plates and two chains, which are spaced apart and arranged in parallel. The transmission component is installed on the two support plates, and the two chains are connected to the transmission component. Several fresh fruit placement rods are connected between the two chains, and two adjacent fresh fruit placement rods form a fresh fruit placement area.
[0016] Preferably, the transmission component includes a driving gear, a driven gear, a first rotating shaft, a second rotating shaft, and four sprockets. The driving gear is connected to the output shaft of the drive motor, the driven gear is connected to one end of the first rotating shaft, and the driven gear meshes with the driving gear. Two sprockets are connected to both ends of the first rotating shaft, and two sprockets are connected to both ends of the second rotating shaft. The two sprockets on the first rotating shaft correspond to the two sprockets on the second rotating shaft. Both the first and second rotating shafts are rotatably connected to two support plates. The first and second rotating shafts are spaced apart at both ends of the support portion, and two chains mesh with the corresponding two sets of sprockets on the first and second rotating shafts, respectively.
[0017] Preferably, a moisture sensor is installed in the through channel, the moisture sensor is connected to a control module, and the control module is also connected to the drive motor of the feed dewatering conveyor belt and an air compressor.
[0018] Preferably, a support net is laid on several fresh fruit placement poles.
[0019] Compared with existing technologies, this utility model has the following beneficial effects:
[0020] 1. The novel low-temperature airflow rapid drying device for fresh fruit surface can quickly dry fresh fruit after soaking and ripening, and uses low-temperature airflow to avoid heat damage.
[0021] 2. The novel low-temperature airflow rapid drying device for fresh fruit uses an air knife nozzle. Through the principle of industrial air knife, the low-temperature airflow is accelerated to 50-120 m / s through a specially designed narrow air duct, forming a uniform, high-energy "air curtain" that instantly blows away the water film and water droplets on the surface of the fruit.
[0022] 3. The low-temperature airflow rapid drying device for fresh fruit surface of this utility model adopts a spiral pipe. The spiral pipe surrounds the feeding and draining conveyor belt to ensure that all parts of the fruit surface are subjected to uniform blowing force regardless of the posture in which the fruit passes through, avoiding dead corners. Attached Figure Description
[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.
[0024] Figure 1 A three-dimensional diagram of a device for rapidly drying the surface of fresh fruit using low-temperature airflow.
[0025] Figure 2 This is a front view of a device for rapidly drying the surface of fresh fruit using low-temperature airflow.
[0026] Figure 3 This is a top view of a device for rapidly drying the surface of fresh fruit using low-temperature airflow.
[0027] Figure 4 This is a schematic diagram showing the connection of the air compressor, vortex tube, and spiral pipe.
[0028] Figure 5 This is a schematic diagram of a vortex tube.
[0029] Figure 6 This is a 3D view of a spiral pipe.
[0030] Figure 7 This is a schematic diagram of a spiral pipe and a feed dewatering conveyor belt.
[0031] Explanation of key figure labels:
[0032] 1 is the frame, 2 is the housing, 3 is the opening and closing door, 4 is the feeding and draining conveyor belt, 5 is the air compressor, 6 is the vortex tube, 7 is the spiral pipe, 8 is the drive motor, 9 is the support plate, 10 is the first rotating shaft, 11 is the sprocket, and 12 is the chain. Detailed Implementation
[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0034] In the description of this utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "top surface", "bottom surface", "inner", "outer", "inner side", "outer side", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0035] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If the terms "first," "second," and "third" are used in the description, they are for descriptive purposes and to distinguish technical features, and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the sequential relationship of the indicated technical features.
[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The embodiments of this utility model will now be described based on its overall structure.
[0037] Example 1
[0038] like Figures 1-7 As shown, this embodiment provides a rapid low-temperature airflow drying device for the surface of fresh fruit, comprising:
[0039] A frame 1 is provided, and a housing 2 is provided on the frame 1. The housing 2 is provided with a through channel that passes through both ends of the housing 2.
[0040] Feeding and draining conveyor belt 4 passes through the through-passage;
[0041] Air compressor 5 is installed inside or outside the frame 1. The air outlet of air compressor 5 is connected to vortex tube 6. Air compressor 5 compresses air to drive vortex tube 6, generating two airflows, one cold and one hot. The cold airflow (down to -20℃) is mixed with part of the room temperature air, the temperature is adjusted to the target value, and then delivered to spiral pipe 7.
[0042] Spiral pipe 7, one end of spiral pipe 7 is connected to vortex pipe 6, spiral pipe 7 is wrapped around the outside of feed dewatering conveyor belt 4, spiral pipe 7 has a connection port, and the other end of spiral pipe 7 is closed.
[0043] Air knife nozzle, air knife nozzle connects to the connector. Specifically, the air knife nozzle can be the Wenyijia air knife / air knife / aluminum alloy air knife / stainless steel air knife blowing nozzle manufactured by Kaisheng Precision.
[0044] The frame 1 includes four support columns and four crossbeams. The four support columns are arranged in a rectangular shape, and the four crossbeams are connected in one step to form a rectangular frame. The four corners of the rectangular frame are fixedly connected to the top of the four support columns respectively. The housing 2 is installed on the top of the rectangular frame.
[0045] Each support column is connected to a stabilizing plate at its bottom. By installing stabilizing plates, the contact area between the support column and the ground is increased, thereby improving the stability of frame 1.
[0046] The top of the enclosure 2 is equipped with an opening door 3. Specifically, the top of the enclosure 2 has an open structure, and the opening door 3 includes two door panels and corresponding hinges. Each door panel is hinged to the top of the enclosure 2 by at least two hinges. By providing the opening door 3, it is convenient to observe the interior of the enclosure 2.
[0047] The feeding and draining conveyor belt 4 includes a drive motor 8, a transmission component, chains 12, and support plates 9. The drive motor 8 is mounted on the outside of the rectangular frame, and its output shaft is connected to the transmission component. There are two support plates 9 and two chains 12, spaced apart and parallel to each other. The transmission component is mounted on the two support plates 9, and the two chains 12 are connected to the transmission component. Several fresh fruit placement rods are connected between the two chains 12, and adjacent fresh fruit placement rods form a fresh fruit placement area. By forming a fresh fruit placement area between adjacent fresh fruit placement rods, a large amount of free water on the surface of the fresh fruit can be directly removed from the surface of the fresh fruit.
[0048] The transmission components include a driving gear, a driven gear, a first rotating shaft 10, a second rotating shaft, and four sprockets 11. The driving gear is connected to the output shaft of the drive motor 8. The driven gear is connected to one end of the first rotating shaft 10 and meshes with the driving gear. Two sprockets 11 are connected to both ends of the first rotating shaft 10, and two sprockets 11 are connected to both ends of the second rotating shaft. The two sprockets 11 on the first rotating shaft 10 correspond to the two sprockets 11 on the second rotating shaft. Both the first rotating shaft 10 and the second rotating shaft are rotatably connected to two support plates 9. The first rotating shaft 10 and the second rotating shaft are spaced apart at both ends of the support plates 9. Two chains 12 mesh with the corresponding two sets of sprockets 11 on the first rotating shaft 10 and the second rotating shaft, respectively. Specifically, the driving gear and the driven gear are helical gears. The two ends of the first rotating shaft 10 and the second rotating shaft are rotatably connected to the two support plates 9 through bearings, respectively. The two sprockets 11 on the first rotating shaft 10 and the second rotating shaft are located in the area between the two support plates 9. The chains 12 mesh with the two sprockets 11 closest to the same support plate 9. The drive motor 8 is connected to the power supply. The drive motor 8 drives the drive gear to rotate. The drive gear drives the driven gear to rotate. The driven gear drives the first rotating shaft 10 to rotate. The first rotating shaft 10 drives the two sprockets 11 sleeved on it to rotate. The two sprockets 11 drive the two chains 12 to move. The two chains 12 drive the two sprockets 11 on the second rotating shaft to rotate, thereby driving the second rotating shaft to rotate.
[0049] A moisture sensor is installed in the through-channel, which is connected to a control module. The control module is also connected to the drive motor 8 of the feeding and draining conveyor belt 4 and the air compressor 5. By setting a near-infrared (NIR) moisture sensor, the surface humidity of the fruit at the outlet of the through-channel is monitored in real time, and the data is fed back to the control module to adjust the wind speed of the air knife nozzles and the speed of the feeding and draining conveyor belt 4 to achieve adaptive and precise drying. The control module uses an existing PLC controller.
[0050] Several fruit-holding poles are covered with a support net. By setting up the support net, different fruits and fruits of different sizes can be accommodated. For example, persimmons are of different sizes. If the distance between adjacent fruit-holding poles is too large, the persimmons will fall between the poles. If the distance between adjacent fruit-holding poles is too small, the air blower at the bottom will not be able to effectively blow the bottom of the persimmons. Therefore, a support net can be laid on the fruit-holding poles to weigh persimmons of different sizes without affecting the air blower at the bottom of the persimmons.
[0051] It should be noted that the fresh fruit automatically falls into the fresh fruit collection container at the end of the feeding and draining conveyor belt 4. The spiral pipe 7 has corresponding gaps at this point to prevent the fresh fruit from hitting the spiral pipe 7 during the falling process.
[0052] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. The purpose of selecting and describing exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art, after reading this specification, can make modifications, substitutions, variations, and various choices and changes to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, variations, and choices and changes are within the scope of the claims of the present invention and are protected by patent law.
Claims
1. A device for low-temperature air flow rapid blowing of fresh fruit surface, characterized in that, include: A frame, on which a housing is mounted, and the housing has a through passage that extends through both ends of the housing; The feed drain conveyor belt passes through the through-passage; An air compressor is installed inside or outside the frame, and the air outlet of the air compressor is connected to a vortex tube. The spiral pipe has one end connected to the vortex pipe and is wrapped around the outside of the feed dewatering conveyor belt. The spiral pipe has a connection port and the other end of the spiral pipe is closed. Air knife nozzle, air knife nozzle connected to the connector.
2. The low-temperature airflow rapid blowing device for fresh fruit surface according to claim 1, characterized in that, The frame includes four support columns and four crossbeams. The four support columns are arranged in a rectangular shape, and the four crossbeams are connected in one go to form a rectangular frame. The four corners of the rectangular frame are fixedly connected to the top of the four support columns respectively. The housing is installed on the top of the rectangular frame.
3. The device for low-temperature air flow rapid blowing of fresh fruit surface according to claim 2, characterized in that, Each support column has a stabilizing plate attached to its bottom.
4. The low-temperature airflow rapid blowing device for fresh fruit surface according to claim 1, characterized in that, The top of the box has an opening and closing door.
5. The rapid airflow drying device for fresh fruit surface according to claim 2, characterized in that, The feeding and draining conveyor belt includes a drive motor, transmission components, chains, and support plates. The drive motor is installed on the outside of the rectangular frame, and the output shaft of the drive motor is connected to the transmission components. There are two support plates and two chains, which are spaced apart and arranged in parallel. The transmission components are installed on the two support plates, and the two chains are connected to the transmission components. Several fresh fruit placement rods are connected between the two chains, and two adjacent fresh fruit placement rods form a fresh fruit placement area.
6. The low-temperature airflow rapid blowing device for fresh fruit surface according to claim 5, characterized in that, The transmission components include a driving gear, a driven gear, a first rotating shaft, a second rotating shaft, and four sprockets. The driving gear is connected to the output shaft of the drive motor, the driven gear is connected to one end of the first rotating shaft, and the driven gear meshes with the driving gear. Two sprockets are connected to both ends of the first rotating shaft, and two sprockets are connected to both ends of the second rotating shaft. The two sprockets on the first rotating shaft correspond to the two sprockets on the second rotating shaft. Both the first and second rotating shafts are rotatably connected to two support plates. The first and second rotating shafts are spaced apart at both ends of the support section. Two chains mesh with the corresponding two sets of sprockets on the first and second rotating shafts, respectively.
7. The low-temperature airflow rapid blowing device for fresh fruit surface according to claim 1, characterized in that, A moisture sensor is installed in the through channel. The moisture sensor is connected to a control module, which is also connected to the drive motor of the feed dewatering conveyor belt and an air compressor.
8. The low-temperature airflow rapid blowing device for fresh fruit surface according to claim 1, characterized in that, Several fresh fruits were placed on poles covered with a support net.