Device for carrying out fruit fresh-keeping treatment by utilizing plasma
By designing a fruit preservation and treatment device including a plasma reactor and a gas blowing device, the problem of difficult plasma distribution in DBD is solved, and a more efficient and safe fruit preservation effect is achieved.
Patent Information
- Application Number
- CN202421008539.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-10
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-05-10
AI Technical Summary
In dielectric barrier discharge (DBD), plasma is difficult to evenly distribute throughout the entire processing area, resulting in unsatisfactory processing results.
A device including a frame, a plasma reactor, a fruit placement plate, an electromagnetic shielding layer and a gas blowing device is designed. The plasma reactor is suspended on the frame, the high-voltage electrode is a copper wire mesh, the insulating material is a polytetrafluoroethylene plate, and the low-voltage electrode is a copper plate. The gas blowing device blows the plasma to the fruit placement plate through a blower and a gas conduit.
The uniform distribution of plasma in the treatment space is achieved, the efficiency and effect of fruit preservation is improved, and it is safer and does not destroy the original flavor of the fruit.
Smart Images
Figure CN222622086U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of plasma and the field of fruit preservation treatment, in particular to a device for fruit preservation treatment using plasma. Background Art
[0002] At present, the classification methods used for fruit preservation treatment are mainly classified according to the principles: treating the surrounding environment, isolating the fruit from the environment, and treating the fruit itself. Among them, there are many methods for treating the fruit itself, such as irradiation and electrostatic preservation, ultrasonic preservation, plasma preservation and other preservation modes.
[0003] Among them, plasma preservation has the advantages of high applicability, low price, easy processing, and no destruction of the original fruit characteristics and flavor. Under low temperature or normal temperature and atmospheric pressure conditions, it can utilize the characteristics of a large number of active particles in the plasma to process substances in the fruit that cause the fruit to deteriorate, and maintain the appearance and original taste of the fruit. It is widely used in the preservation of various fruits, such as rock sugar oranges, strawberries, etc.
[0004] The main methods of generating plasma are: corona discharge, dielectric barrier discharge (DBD), and atmospheric pressure low-temperature plasma jet. Among them, dielectric barrier discharge has the advantages of high stability, ability to generate low-temperature plasma, safe and convenient operation, etc., and is widely welcomed.
[0005] However, in DBD discharge, the effects of discharge treatments with different structures are very different. When the structure is not suitable for generating plasma, it is difficult for the generated plasma to cover the entire treatment area, resulting in unsatisfactory treatment effects.
[0006] Therefore, there is a need for a structure that can evenly distribute plasma in a processing space and more conveniently apply processing voltages to high and low voltage electrodes. Utility Model Content
[0007] The utility model aims to provide a device for preserving fruits by utilizing plasma, which comprises a frame, a plasma reactor, a fruit placing plate, an electromagnetic shielding layer and a gas blowing device.
[0008] The frame has an inner cavity and one end of the frame is open.
[0009] The plasma reactor is suspended inside the frame.
[0010] The fruit placing plate is fixed inside the frame.
[0011] The fruit placing plate is located below the plasma reactor.
[0012] The electromagnetic shielding layer is arranged at the opening of the frame.
[0013] When in use, the gas blowing device generates plasma and blows it toward the fruit placement plate.
[0014] Furthermore, the frame is a wooden frame.
[0015] Furthermore, the frame is a quadrangular prism structure with one side open, the side opposite to the open side is denoted as A5, and the other four sides are denoted as A1, A2, A3 and A4.
[0016] Among them, surface A1 and surface A2 are the left and right surfaces of the frame respectively.
[0017] Surface A3 and Surface A4 are the top and bottom surfaces of the frame, respectively.
[0018] The plasma reactor is suspended on the top surface A3 of the frame.
[0019] The fruit placing plate is arranged between surface A1 and surface A2.
[0020] Furthermore, the plasma reactor comprises a high voltage electrode, an insulating material and a low voltage electrode; the insulating material is located between the high voltage electrode and the low voltage electrode.
[0021] Furthermore, the high-voltage electrode is a copper wire mesh, the insulating material is a polytetrafluoroethylene plate, and the low-voltage electrode is a copper plate.
[0022] Furthermore, the length and width of the copper wire mesh are equal to the length and width of the copper plate.
[0023] The length and width of the polytetrafluoroethylene plate are greater than those of the copper plate.
[0024] The copper wire mesh, the polytetrafluoroethylene plate and the copper plate are all of equal thickness.
[0025] Furthermore, the fruit placement plate is a hollow plate.
[0026] Furthermore, the electromagnetic shielding layer is a copper tape.
[0027] Furthermore, the gas blowing device includes a blower and an air guide tube, one end of the air guide tube is connected to the blower, and the other end of the air guide tube passes through the through hole at the top of the frame and extends into the inner cavity of the frame.
[0028] The technical effect of the utility model is unquestionable, and the beneficial effects of the utility model are as follows:
[0029] 1. The utility model is a processing device structure for preserving fruits by using plasma. The structure can generate a large amount of low-temperature plasma under the provision of a high-voltage pulse nanosecond discharge power supply to preserve the fruits to be processed.
[0030] 2. The utility model avoids many problems in preserving fruits by using plasma, and effectively improves the processing efficiency and effect of plasma on fruit preservation.
[0031] 3. Compared with other fruit preservation treatment devices, such as preservatives, the utility model is safer and can ensure the flavor of the fruit. BRIEF DESCRIPTION OF THE DRAWINGS
[0032] Figure 1 This is a schematic diagram of a device according to Embodiment 3 of the present utility model;
[0033] Figure 2 It is a schematic diagram of the cross-sectional structure of a plasma reactor;
[0034] Figure 3 is a schematic diagram when the low-voltage electrode of the plasma reactor is a copper plate;
[0035] Figure 4 is a schematic diagram when the high voltage electrode of the plasma reactor is a copper wire mesh;
[0036] Figure 5 Schematic diagram of the fruit placement board structure.
[0037] In the figure: frame 1, plasma reactor 2, high voltage electrode 201, insulating material 202, low voltage electrode 203, fruit placement plate 3, electromagnetic shielding layer 4, through hole 5. DETAILED DESCRIPTION
[0038] The present invention is further described below in conjunction with the embodiments, but it should not be understood that the above subject matter of the present invention is limited to the following embodiments. Without departing from the above technical ideas of the present invention, various substitutions and changes are made according to the common technical knowledge and conventional means in the field, which should be included in the protection scope of the present invention.
[0039] Embodiment 1:
[0040] A device for preserving fruits by using plasma comprises a frame 1, a plasma reactor 2, a fruit placing plate 3, an electromagnetic shielding layer 4 and a gas blowing device.
[0041] The frame 1 has an inner cavity, and one end of the frame 1 is open.
[0042] The plasma reactor 2 is suspended inside the frame 1 .
[0043] The plasma reactor 2 is powered by a high-voltage nanosecond pulse discharge power supply and generates plasma.
[0044] The fruit placing plate 3 is fixed inside the frame 1 .
[0045] The fruit placing plate 3 is arranged horizontally and is used for placing fruits.
[0046] The fruit placing plate 3 is located below the plasma reactor 2 .
[0047] The electromagnetic shielding layer 4 is arranged at the open portion of the frame 1 to isolate and shield the electromagnetic field formed by the high voltage.
[0048] The gas blowing device generates plasma and blows it toward the fruit placing plate 3 .
[0049] Embodiment 2:
[0050] The main structure of this embodiment is the same as that of Embodiment 1. Furthermore, the frame 1 is a wooden frame.
[0051] Embodiment 3:
[0052] The main structure of this embodiment is the same as any one of Embodiments 1 to 2. Figure 1 The frame 1 is a quadrangular prism structure with one side open. The side opposite to the open side is denoted as A5, and the other four sides are denoted as A1, A2, A3 and A4.
[0053] The surface A1 and the surface A2 are respectively the left surface and the right surface of the frame 1 .
[0054] The surface A3 and the surface A4 are the top surface and the bottom surface of the frame 1 , respectively.
[0055] The plasma reactor 2 is suspended on the top surface A3 of the frame 1 . In this embodiment, two plasma reactors 2 are arranged.
[0056] The fruit placing plate 3 is arranged between the surface A1 and the surface A2.
[0057] Embodiment 4:
[0058] The main structure of this embodiment is the same as any one of Embodiments 1 to 3. Figure 2 The plasma reactor 2 includes a high voltage electrode 201, an insulating material 202 and a low voltage electrode 203. The insulating material 202 is located between the high voltage electrode 201 and the low voltage electrode 203.
[0059] Embodiment 5:
[0060] The main structure of this embodiment is the same as that of Embodiment 4. Furthermore, the high voltage electrode 201 is a copper wire mesh, the insulating material 202 is a polytetrafluoroethylene plate, and the low voltage electrode 203 is a copper plate.
[0061] Embodiment 6:
[0062] The main structure of this embodiment is the same as that of Embodiment 5. Furthermore, the length and width of the copper wire mesh are equal to the length and width of the copper plate.
[0063] The length and width of the polytetrafluoroethylene plate are greater than those of the copper plate.
[0064] The copper wire mesh, the polytetrafluoroethylene plate and the copper plate are all of equal thickness.
[0065] Embodiment 7:
[0066] The main structure of this embodiment is the same as any one of Embodiments 1 to 6. Furthermore, the plasma reactor 2 processes the surrounding air to generate plasma based on: high-voltage nanosecond pulse discharge causes the plasma reactor 2 to form DBD discharge.
[0067] Embodiment 8:
[0068] The main structure of this embodiment is the same as any one of Embodiments 1 to 7. Figure 5 , the fruit placing plate 3 is a hollow plate.
[0069] Embodiment 9:
[0070] The main structure of this embodiment is the same as any one of Embodiments 1 to 8. Furthermore, the electromagnetic shielding layer 4 is a copper tape.
[0071] Embodiment 10:
[0072] The main structure of this embodiment is the same as any one of Embodiments 1 to 9. Figure 1 The frame 1 is a quadrangular prism structure with one side open. The side opposite to the open side is denoted as A5, and the other four sides are denoted as A1, A2, A3 and A4.
[0073] The surface A1 and the surface A2 are respectively the left surface and the right surface of the frame 1 .
[0074] The surface A3 and the surface A4 are the top surface and the bottom surface of the frame 1, respectively.
[0075] A through hole 5 is formed on the top surface A3 of the frame 1 .
[0076] Embodiment 11:
[0077] The main structure of this embodiment is the same as any one of Embodiments 1 to 10. Furthermore, the gas blowing device includes a blower and an air duct, one end of the air duct is connected to the blower, and the other end passes through the through hole 5 at the top of the frame 1 and extends into the inner cavity of the frame 1.
[0078] The plasma is blown toward the fruit placement plate 3 through the blower and the air guide tube.
[0079] Embodiment 12:
[0080] The main structure of this embodiment is the same as any one of embodiments 1 to 11. Furthermore, a device for preserving fruits using plasma includes a gas blowing device, a plasma reactor, a wooden frame, a fruit placement plate, and an electromagnetic shielding layer.
[0081] The wooden frame plays a supporting role and forms a fresh-keeping processing space.
[0082] The wooden boards of the devices are A1, A2, A3, A4, and A5; the plasma reactors are B1 and B2; and the fruit placement plate is C1.
[0083] A1 is the left side and is connected to the top surface A3, the wooden board A4 on the bottom surface, and the wooden board A5 at the back; A2 is the right side and is also connected to the top surface A3, the wooden board A4 on the bottom surface, and the wooden board A5 at the back.
[0084] The plasma reactors B1, B2 are suspended on the upper top surface A3.
[0085] The plasma reactor requires a high-voltage nanosecond pulse discharge power supply to power it and generate plasma.
[0086] The plasma reactor includes a high voltage electrode, an insulating material, and a low voltage electrode from left to right. The high voltage electrode is a copper wire mesh, the insulating material is a teflon plate, and the low voltage electrode is a copper plate; wherein the teflon plate is sandwiched between the copper plate and the copper wire mesh.
[0087] The copper plate and the copper wire mesh have the same length and width, and the copper wire mesh is 1 / 2 the thickness of the copper plate. The copper plate and the Teflon plate have the same thickness, and the Teflon plate is slightly larger in length and width than the copper plate.
[0088] The fruit placement plate C1 is placed between A1 and A2.
[0089] The fruit placing plate is used to place the fruits to be processed, and comprises a placing frame and a perforated wooden board.
[0090] The electromagnetic shielding layer isolates and shields the electromagnetic field formed by the high voltage.
[0091] The electromagnetic shielding layer includes a copper tape D1, and the copper tape D1 is adhered to the outer side of the wooden board.
[0092] The gas insufflation device provides air flow and comprises a blower and an air guide tube, wherein the air guide tube comprises a PVC hose.
[0093] The step of the plasma reactor treating the surrounding air to generate plasma includes: utilizing high voltage pulse discharge to make the plasma reaction device form DBD discharge.
[0094] The plasma generated by DBD discharge is blown by a blower onto the fruit placement plate C1 to preserve the fruit with low-temperature plasma.
Claims
1. A device for preserving fruits using plasma, characterized in that: It comprises a frame (1), a plasma reactor (2), a fruit placement plate (3), an electromagnetic shielding layer (4) and a gas blowing device; The frame (1) has an inner cavity; one end of the frame (1) is open; The plasma reactor (2) is suspended inside the frame (1); The fruit placement plate (3) is fixed inside the frame (1); The fruit placement plate (3) is located below the plasma reactor (2); The electromagnetic shielding layer (4) is arranged at the open portion of the frame (1); When in use, the gas blowing device will generate plasma and blow it towards the fruit placement plate (3).
2. The device for preserving fruits by using plasma according to claim 1, characterized in that: The frame (1) is a wooden frame.
3. The device for preserving fruits by using plasma according to claim 1, characterized in that: The frame (1) is a quadrangular prism structure with one side open, the side opposite to the open side is denoted as A5, and the other four sides are denoted as A1, A2, A3 and A4; Wherein, surface A1 and surface A2 are the left and right surfaces of the frame (1) respectively; Surface A3 and surface A4 are respectively the top surface and bottom surface of the frame (1); The plasma reactor (2) is suspended on the top surface A3 of the frame (1); The fruit placement plate (3) is arranged between the surface A1 and the surface A2.
4. The device for preserving fruits by using plasma according to claim 1, characterized in that: The plasma reactor (2) comprises a high-voltage electrode (201), an insulating material (202) and a low-voltage electrode (203); the insulating material (202) is located between the high-voltage electrode (201) and the low-voltage electrode (203).
5. The device for preserving fruits by using plasma according to claim 4, characterized in that: The high-voltage electrode (201) is a copper wire mesh, the insulating material (202) is a polytetrafluoroethylene plate, and the low-voltage electrode (203) is a copper plate.
6. The device for preserving fruits by using plasma according to claim 5, characterized in that: The length and width of the copper wire mesh are equal to the length and width of the copper plate; The length and width of the polytetrafluoroethylene plate are greater than the length and width of the copper plate; The copper wire mesh, the polytetrafluoroethylene plate and the copper plate are all of equal thickness.
7. The device for preserving fruits by using plasma according to claim 1, characterized in that: The fruit placement plate (3) is a hollow plate.
8. The device for preserving fruits by using plasma according to claim 1, characterized in that: The electromagnetic shielding layer (4) is a copper tape.
9. The device for preserving fruits by using plasma according to claim 1, characterized in that: The gas blowing device comprises a blower and an air guide tube, one end of the air guide tube is connected to the blower, and the other end of the air guide tube passes through a through hole (5) at the top of the frame (1) and extends into the inner cavity of the frame (1).