Pretreatment-promoting device for fruits with waxy epidermis

Abstract

The utility model discloses a pre-treatment promoting device for fruits with waxy epidermis, which adopts a cold plasma jet device to release jet cold plasma to an objective table, so as to change charge distribution on the waxy epidermis surface by using a variable electric field and generated free radicals and free electrons in the discharge process of the jet cold plasma. Meanwhile, due to the etching effect of jet flow cold plasma treatment, wax on the epidermis of the fruits with wax on the epidermis is broken, a new moisture diffusion channel is formed, and therefore the diffusion rate and quality of the moisture of the fruits in the drying process are improved. The device is suitable for pre-treatment of fruits with waxy epidermis, has the advantages of rapid and efficient dehydration and drying and continuous drying promotion treatment of the fruits, is simple and convenient to operate, mild in condition, green and safe, remarkable in drying promotion effect, high in treatment speed and more environment-friendly, gets rid of dependence of dipping and drying promotion by using a chemical drying promoter at present, and has a wide application prospect. The drying quality and the eating safety of the fruits with waxy epidermis are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the skin fruit drying processing technical field with waxy, especially a skin fruit drying treatment device with waxy. BACKGROUND

[0002] The skin fruit with waxy is common for some skin fruit products with waxy, such as medlar, grape etc. The skin waxy covers the outermost layer of fruit skin cell, and it is a kind of hydrophobic substance, which plays an important role in the growth, development and storage of plant fruit. Fruit drying is a common food industry technology, and the skin waxy layer on the surface of fruit will hinder its moisture diffusion, thereby slowing down the diffusion rate of moisture from inside to outside, greatly reducing the drying efficiency of fruit.

[0003] To reduce drying time and accelerate the drying process, the moisture diffusion rate can be improved by destroying the waxy layer covered on the surface of fruit, that is, chemical pretreatment, and the waxy layer is often dissolved by using alkaline drying agent, and the pericarp is corroded into many micropores to reduce the obstruction of the waxy layer and increase the moisture migration pore channel. The main components of the drying agent are a mixture of sodium hydroxide, calcium carbonate (or potassium carbonate, sodium bicarbonate) and ethyl oleate, which will cause certain harm to the respiratory and digestive systems of humans (such as causing throat itching) when left in dried fruit. At the same time, how to dispose of the highly corrosive drying agent waste liquid is also a thorny problem. In addition, since the drying agent will corrode the pericarp into many micropores, it will affect the quality of the dried product to some extent, making the product quality poor, uneven and unstable.

[0004] Therefore, it is urgent to develop a new type of skin fruit drying treatment technology with waxy to get rid of the dependence on the use of chemical drying agent immersion drying, and to improve the drying quality and edible safety of such fruits. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a skin fruit drying treatment device with waxy to get rid of the dependence on the use of chemical drying agent immersion drying, improve the drying quality and edible safety of the skin fruit with waxy, and solve the problems existing in the prior art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following scheme:

[0007] The utility model provides a skin fruit drying treatment device with waxy, which comprises:

[0008] A base;

[0009] A loading table is arranged on the base through a connecting piece one, and the loading table is used for placing the fruit to be treated;

[0010] A cold plasma jet device is arranged on the base through the second connecting member, and is used to release a jet cold plasma to the object table to destroy the cutin on the surface of the fruit and form new water diffusion channels.

[0011] In some embodiments, the second connecting member comprises a support frame arranged on the top surface of the base and an adjusting assembly arranged on the support frame, and the cold plasma jet device is arranged on the adjusting assembly; the adjusting assembly is a linear slide, a two-dimensional slide, a three-dimensional slide or a multi-degree-of-freedom mechanical arm, and is used to adjust the spatial position of the cold plasma jet device relative to the object table.

[0012] In some embodiments, the support frame is a portal frame structure arranged above the object table; the adjusting assembly is arranged on the top beam of the support frame, and the outlet of the cold plasma jet device faces the object table.

[0013] In some embodiments, the table surface of the object table is planar.

[0014] In some embodiments, a plurality of rotating rollers are arranged in parallel on the table surface of the object table, both ends of any one of the rotating rollers are rotationally connected to the object table, the end portions of any one of the rotating rollers are connected to a rotating driving device, an installation gap is left between any two adjacent rotating rollers, and the width of the installation gap is smaller than the particle size of the fruit to be processed; the fruit to be processed can be placed between any two adjacent rotating rollers, and the rotating driving device is used to drive all the rotating rollers to rotate in the same direction and synchronously, so as to drive the fruit to be processed to dynamically tumble through the rotating rollers.

[0015] In some embodiments, the first connecting member is a linear slide, a two-dimensional slide, a three-dimensional slide or a multi-degree-of-freedom mechanical arm, and is arranged on the top surface of the base to adjust the spatial position of the object table relative to the base.

[0016] In some embodiments, the fruit with cutin on the surface intervention treatment device further comprises a control system arranged on the base and used to control the operating state of at least one of the cold plasma jet device, the adjusting assembly, the first connecting member and the rotating driving device.

[0017] In some embodiments, the fruit with cutin on the surface intervention treatment device further comprises a power interface, a control handle, a power master control button, an emergency stop button and a reset button, and the control handle, the power master control button, the emergency stop button and the reset button are in communication connection with the control system, wherein:

[0018] The control handle is in communication connection with the control system, and is used for remote control device;

[0019] The power supply master control button is arranged on the base, and is used for controlling device switching;

[0020] The emergency stop button is arranged on the base, and is used for realizing device emergency stop control;

[0021] The reset button is arranged on the base, and is used for realizing device one-key reset;

[0022] The power supply interface is arranged on the base, and can be connected with 220V-16A quick connection power line.

[0023] In some embodiments, the base is a box base, and movable plate frame surfaces are arranged on the four vertical surfaces of the box base, a pair of opposite movable plate frame surfaces are provided with air vents, and grilles are installed at the air vents.

[0024] In some embodiments, the skin wax fruit promoting intervention treatment device further comprises an air source, the air source is connected with the cold plasma jet device through a gas supply pipeline, and a gas pressure stabilizing and filtering device is arranged on the gas supply pipeline.

[0025] A gas pressure stabilizing and filtering device is further arranged on one side of the box base.

[0026] The utility model provides a kind of skin wax fruit promoting intervention treatment method, is implemented using the above-mentioned skin wax fruit promoting intervention treatment device, comprising:

[0027] The cold plasma jet device is used to release jet cold plasma to the object table, so that the skin wax of the fruit to be treated on the object table is damaged by the jet cold plasma, and new water diffusion channels are formed in the skin wax.

[0028] Compared with the prior art, the utility model has the following technical effects:

[0029] The skin-waxy fruit promoting drying intervention treatment device disclosed by the utility model releases jet cold plasma to the object table by adopting a cold plasma jet device, so that the changed electric field and generated free radicals and free electrons change the skin waxy surface charge distribution in the jet cold plasma discharge process, and the skin waxy fruit skin waxy is broken due to the etching effect of the jet cold plasma treatment, new moisture diffusion channels are formed, and the fruit moisture diffusion rate in the drying process is improved. The fruit drying treatment device based on the jet cold plasma is suitable for skin-waxy fruit promoting drying intervention treatment, especially the drying pretreatment of the fruit with skin waxy layer and high water content, has the advantages of rapid and efficient dehydration drying and continuous promoting drying treatment of the fruit, and is simple and easy to operate, mild, green and safe, has high drying rate and fast treatment speed, is more friendly to the environment, breaks the dependence on chemical drying promoters for drying, and improves the drying quality and edible safety of the skin-waxy fruit. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating labor.

[0031] Figure 1 The front view of the skin-waxy fruit promoting drying intervention treatment device disclosed by the embodiments of the utility model is disclosed.

[0032] Figure 2 The rear view of the skin-waxy fruit promoting drying intervention treatment device disclosed by the embodiments of the utility model is disclosed.

[0033] Figure 3 The influence analysis diagram of different drying treatment modes on the water transverse relaxation time T2 in wolfberry is disclosed.

[0034] Figure 4 The influence analysis diagram of different drying treatment modes on the water transverse peak area in wolfberry is disclosed.

[0035] Figure 5 The wolfberry nuclear magnetic resonance two-dimensional imaging comparison diagram of different drying treatment modes is disclosed.

[0036] Figure 6 The influence comparison diagram of different drying treatment modes on the drying characteristics of wolfberry is disclosed.

[0037] Figure 7 The drying effect diagram comparison diagram of wolfberry after different drying treatment is disclosed.

[0038] Figure 8Figure 1 is a comparison chart of the effects of different drying-promoting treatment methods on the microstructure of wolfberry (the upper right corner of each structure chart in the figure is an illustration of the water contact angle test results);

[0039] Figure 9 Figure 1 is a comparison chart of the effects of different drying-promoting treatment methods on the microstructure of wolfberry (the upper right corner of each structure chart in the figure is an illustration of the water contact angle test results);

[0040] Figure 10 Figure 1 is a comparison chart of the effects of different drying-promoting treatment methods on the microstructure of wolfberry (the upper right corner of each structure chart in the figure is an illustration of the water contact angle test results);

[0041] Figure 11 Figure 1 is a comparison chart of the effects of different drying-promoting treatment methods on the microstructure of wolfberry (the upper right corner of each structure chart in the figure is an illustration of the water contact angle test results).

[0042] In the figure, the reference signs are:

[0043] 100, epidermis waxy fruit drying-promoting treatment device;

[0044] 1, base; 11, movable plate frame surface; 12, ventilation opening; 13, fence; 14, gas pressure stabilizing and filtering device;

[0045] 2, object carrier;

[0046] 3, cold plasma jet device;

[0047] 4, connecting piece one;

[0048] 5, connecting piece two; 51, support frame; 52, adjusting assembly;

[0049] 6, power supply interface;

[0050] 7, control handle; 71, control handle data interface;

[0051] 8, power supply master control button;

[0052] 9, emergency stop button;

[0053] 10, reset button. DETAILED DESCRIPTION

[0054] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0055] One of the purposes of the present application is to provide an epidermis waxy fruit drying-promoting treatment device to get rid of the dependence on the use of chemical drying-promoting agents for drying and improve the drying quality and edible safety of such fruits.

[0056] In order to make the above-mentioned purposes, features and advantages of the present application more apparent and understandable, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0057] Embodiment 1

[0058] As shown in Figure 1 and Figure 2 The present embodiment provides a skin wax fruit promoting drying treatment device 100, which comprises a base 1, a carrier table 2 and a cold plasma jet device 3. The carrier table 2 is arranged on the base 1 through a connecting piece one 4, and is used for placing the fruit to be treated. The cold plasma jet device 3 is arranged on the base 1 through a connecting piece two 5, and is used for releasing jet cold plasma to the carrier table 2 to destroy the fruit skin wax of the fruit to be treated on the carrier table 2 by using the jet cold plasma, and to form a water diffusion channel in the skin wax. The jet plasma is a special form of plasma, which makes the gas partially or completely ionized by injecting high-energy electrons, ions or neutral particles into the gas, to generate a mixed particle beam of charged particles and neutral particles. This kind of plasma propagates in the form of jet, can form in an open space or a limited space, and has certain directivity and stability. The cold plasma is a kind of plasma in a thermodynamic non-equilibrium state, which has typical plasma properties, high electron temperature, but low overall temperature, and even close to normal temperature. Therefore, the cold plasma treatment process has high processing efficiency and low energy consumption. The jet cold plasma is a new non-thermal treatment technology, which has the advantages of high efficiency, safety, greenness and energy saving, and shows great potential in improving the drying efficiency in the food drying process. In the process of jet cold plasma discharge, the changing electric field and the generated free radicals and free electrons can change the surface charge distribution of the fruit skin wax. At the same time, due to the etching effect of the jet cold plasma treatment, the skin wax of the fruit with wax skin is broken, and a new water diffusion channel is formed, so as to improve the water diffusion rate of the fruit in the drying process. The above-mentioned skin wax fruit promoting drying treatment device 100 is suitable for fruit promoting drying treatment, especially for the drying pretreatment of fruit with wax skin and high water content, which has the advantages of rapid and efficient dehydration and drying of fruit, continuous drying treatment, simple operation, mild conditions, green safety, high drying rate, fast treatment speed, environmental friendliness, and the like. It breaks away from the dependence on chemical drying agent immersion drying, improves the drying quality and edible safety of the fruit with wax skin. The cold plasma jet device is a mature cold plasma generating device, and its specific structure design and working principle are not described here.

[0059] In some embodiments, as shown in Figure 1 and Figure 2As shown, the connecting piece two 5 includes a support frame 51 and an adjusting assembly 52, the support frame 51 is arranged on the top surface of the base 1, the adjusting assembly 52 is arranged on the support frame 51, and the cold plasma jet device 3 is arranged on the adjusting assembly 52; the adjusting assembly 52 is a linear slide, a two-dimensional slide, a three-dimensional slide or a multi-degree-of-freedom mechanical arm, and the adjusting assembly 52 is used for adjusting the spatial position of the cold plasma jet device 3 relative to the object table 2. The above-mentioned linear slide, two-dimensional slide, three-dimensional slide and multi-degree-of-freedom mechanical arm are common adjusting assemblies, and the specific structure and working principle will not be described here.

[0060] In some specific embodiments, as shown in Figure 1 and Figure 2 As shown, the support frame 51 is a gantry structure, which is arranged across above the object table 2, and the adjusting assembly 52 is arranged on the top beam of the support frame 51; the adjusting assembly 52 preferably adopts a two-dimensional slide, which can drive the cold plasma jet device 3 to slide along the top beam of the support frame 51 and drive the cold plasma jet device 3 to ascend and descend relative to the object table 2, the exit port of the cold plasma jet device 3 vertically faces the object table 2, and the two-dimensional slide can adjust the distance between the exit port of the cold plasma jet device 3 and the fruit to be processed on the object table 2.

[0061] In some embodiments, the table surface of the object table 2 is a dynamic structure, that is, a plurality of rotating supporting rollers are arranged in parallel, both ends of any rotating supporting roller are rotationally connected with the object table 2, and the end of any rotating supporting roller is connected with a rotating driving device, and an installation gap is left between any two adjacent rotating supporting rollers, and the width of the installation gap is less than the particle size of the fruit to be processed; any two adjacent rotating supporting rollers can place the fruit to be processed, and the rotating driving device is used for driving all rotating supporting rollers to rotate in the same direction and synchronously, so as to drive the fruit to be processed to dynamically overturn through the rotating supporting rollers, so that the surface of the fruit is uniformly processed, which is beneficial to improve the drying quality and quality consistency of the fruit. Among them, the rotating driving device has many setting forms, and the rotating driving device can be a motor, and each rotating supporting roller can be respectively configured with a motor; or the rotating driving device is a belt transmission or chain transmission system, taking chain transmission as an example, a driven gear is installed at the end of each rotating supporting roller, the chain is closed loop tensioned on the driving gear and the driven gears of each rotating supporting roller, and is engaged with each gear, and the driving gear is driven to rotate by the motor, so as to drive the chain to close loop transmission, and then drive each rotating supporting roller to rotate. The above-mentioned belt transmission or chain transmission system is a mature driving mechanism, and the specific working principle will not be described here. It should be noted that the gap width of the rotating supporting rollers on the object table 2 can be flexibly adjusted according to different sizes of fruits to adapt to the particle size of different waxy fruits; the gap width adjustment mode can be manual adjustment, or related structures can be set to automatically adjust mechanically, and the specific can refer to the existing noodle machine conveying roller, which will not be described here.

[0062] In some embodiments, the connecting member 4 is a linear slide, a two-dimensional slide, a three-dimensional slide or a multi-degree-of-freedom mechanical arm, which is arranged on the top surface of the base 1 and used to adjust the spatial position of the object table 2 relative to the base 1. The linear slide, the two-dimensional slide, the three-dimensional slide and the multi-degree-of-freedom mechanical arm are all common adjustment components, and the specific structure and working principle are not described here.

[0063] In some embodiments, the adjustment component 52 preferably adopts a two-dimensional slide, which can drive the object table 2 to move forward, backward, leftward and rightward relative to the base 1, and the object table 2 is always arranged horizontally to ensure that the outlet of the cold plasma jet device 3 is vertically directed to the object table 2.

[0064] In some embodiments, the skin-waxy fruit promoting intervention treatment device 100 further comprises a control system arranged on the base 1 and used to control the operating state of at least one of the cold plasma jet device 3, the adjustment component 52, the connecting member 4 and the rotary driving device. Generally, the cold plasma jet device 3, the adjustment component 52, the connecting member 4 and the rotary driving device are all in communication connection with the control system.

[0065] In some embodiments, the skin-waxy fruit promoting intervention treatment device 100 further comprises a power interface 6, a control handle 7, a power master control button 8, an emergency stop button 9 and a reset button 10. The control handle 7, the power master control button 8, the emergency stop button 9 and the reset button 10 are all in communication connection with the control system, and each electrical device is electrically connected with the power interface 6. The power master control button 8 is arranged on the base 1 and used as a master switch power supply to control the on and off of the entire device. The emergency stop button 9 is arranged on the base 1 and used to realize the emergency stop control of the entire device. The reset button 10 is arranged on the base 1 and used to realize the one-key reset of the entire device, so that the object table 2 and the cold plasma jet device 3 are all restored to the initial position state under the driving of the corresponding slide. The power interface 6 is arranged on the base 1 and can be connected with a 220V-16A quick connection power line. The base 1 is provided with a control handle data interface 71 which is in communication connection with the control system. The control handle 7 can be in communication connection with the control handle data interface through a data line, and the control handle 7 can also be used to control the start and stop and the operating state of the device.

[0066] In some embodiments, the base 1 is a box-shaped base, and the above-mentioned control system can be configured and installed in the box-shaped base. The four surrounding vertical surfaces of the box-shaped base are provided with movable plate frame surfaces 11, and a pair of opposite movable plate frame surfaces 11 are provided with air vents 12, and the air vents 12 are installed with fence grids 13 to isolate dust.

[0067] In some embodiments, the epidermis waxy fruit promoting intervention treatment device 100 is further provided with an air source connected to the cold plasma jet device 3 through a gas supply pipeline to provide a certain pressure of gas for the cold plasma jet device 3; a gas pressure stabilizing and filtering device 14 is arranged on the above-mentioned gas supply pipeline to perform pressure reduction, gas filtering and oil mist separation and other treatments on the gas before it enters the cold plasma jet device 3, so as to improve the operation reliability of the cold plasma jet device 3. The gas pressure stabilizing and filtering device 14 is a mature equipment product, and its specific structure and working principle will not be described here.

[0068] In some embodiments, a mobile power supply can be installed and arranged in the box type base to supply power to the whole device.

[0069] In some embodiments, supports or casters can be arranged at the four corners of the bottom of the base 1.

[0070] The main working process of the epidermis waxy fruit promoting intervention treatment method implemented by the above-mentioned epidermis waxy fruit promoting intervention treatment device is as follows: the cold plasma jet device 3 releases jet cold plasma to the object table 2 to destroy the epidermis wax of the fruit to be treated on the object table 2 by using the jet cold plasma, and forms new water diffusion channels in the epidermis wax. The effect of the epidermis waxy fruit drying pretreatment method based on jet cold plasma of the present embodiment is verified and described below in combination with specific examples and comparative examples:

[0071] I. The fruit to be treated is wolfberry

[0072] Step 1: The fresh wolfberry after being selected and washed is placed on the object table 2 of the above-mentioned epidermis waxy fruit promoting intervention treatment device 100, the distance between the exit of the cold plasma jet device 3 and the wolfberry sample is adjusted to 4cm-6cm, the power of the cold plasma jet device 3 is 500W-700W, the air source pressure is 0.4Mpa-0.6Mpa, and the drying treatment time is 40s-60s.

[0073] Step 2: The treated wolfberry sample is placed in a semi-open air source heat pump drying room, the drying temperature is set to 40℃-60℃, the humidity is 25%-40%, and drying treatment is performed.

[0074] 1. Effect of different drying promoting intervention treatments on the water distribution state in wolfberry

[0075] The effect of the above-mentioned epidermis waxy fruit promoting intervention treatment method based on jet cold plasma on the water distribution state in wolfberry compared with traditional alkali immersion (10% NaHCO3) is shown in Figure 3 and 4 The relaxation peaks from left to right represent the three main water components in wolfberry: bound water (T 21, 0.01~10ms), not suitable for flowing water (T 22 , 10~100ms), free water (T 23 , 100~1000ms and T 24 , 1000~10000ms). Each relaxation peak area is marked as A 21 、A 22 、A 23 and A 24 . As can be seen from the figure, the water content in fresh wolfberry is mainly free water, and the water content accounts for a high proportion. After being treated with the waxy fruit epidermis intervention treatment method based on jet cold plasma, the T2 relaxation peak drifted significantly to the left, proving that the active chemical species in the plasma help to break the hydrogen bonds between water molecules, reduce the interaction force between water molecules, and transform the bound water into free water that is more easily evaporated, effectively changing the mobility of water in wolfberry; at the same time, T 24 Peak area (A 24 ) was significantly lower than that of the fresh wolfberry and alkali solution soaking treatment group, indicating that the plasma drying treatment has evaporated part of the water, thereby improving the drying efficiency. Among them, the peak area of ​​immobile water and bound water (A 22 and A 21 ) is the lowest, indicating that the mobility of water molecules inside it increases and is easier to be dried and removed. Figure 5 This is also confirmed in two-dimensional NMR images of wolfberries treated with different growth enhancers. The colors in the images shift from white to black, representing a progression from low to high proton density. The signal intensity of the NMR image is directly proportional to the sample's moisture content. The images clearly show that the waxy fruit treated with the aforementioned growth enhancer treatment method exhibits a more even distribution of moisture within the wolfberries, with water evaporating from the edges of the fruit.

[0076] 2. Effects of different growth promoter treatments on heat pump drying characteristics of wolfberry

[0077] The above-mentioned jet cold plasma-based epidermal waxy fruit pretreatment method was compared with the traditional alkali solution soaking (10% NaHCO3) on the effect of the wolfberry drying process. Figure 6 As shown in the figure, as the control group, the drying time of the wolfberry sample without pretreatment and the wolfberry sample treated with sodium bicarbonate solution was 40h and 28h respectively. Compared with the case without pretreatment, the treatment method based on the waxy fruit epidermis had a significant effect on the drying time of wolfberry. The drying time of the wolfberry sample was reduced by 15h, shortening the drying time by 37.5%, indicating that cold plasma can significantly shorten the drying time. The effect after drying is as follows. Figure 7 As shown, the wolfberry dried fruits treated with the above-mentioned waxy fruit growth-promoting treatment method are fuller.

[0078] 3. Effects of different growth-promoting treatments on the microstructure of wolfberry

[0079] The microstructure of wolfberry skin under different promotion and intervention treatments Figure 8 As shown in the figure (the illustration is the water contact angle test result), the epidermis of the control group (fresh) does not have any cracks or holes, the water contact angle is 93.1°, and the epidermal wax layer is intact with good hydrophobic properties. The surface of the wolfberry peel soaked in alkali solution is smoother, with a water contact angle of 97.5°. Although it can dissolve the surface wax, it fails to form cracks and micropores. The surface hydrophobicity is enhanced and the water contact angle increases. After being treated with the above-mentioned epidermal waxy fruit promotion method, the surface wax layer is dissolved, the water contact angle is 81.6°, cracks and holes appear on the surface of the wolfberry peel, the hydrophilicity increases, and the water contact angle decreases, providing a channel for the rapid loss of water during subsequent drying, which is beneficial to reduce the migration resistance of free water during the drying process and shorten the drying time.

[0080] 2. The fruit to be processed is grapes

[0081] Step 1: Using the aforementioned waxy fruit pretreatment device 100, place a selected and cleaned seedless white grape sample on the stage 2. Adjust the outlet of the cold plasma jet device 3 to a distance of 3 cm to 5 cm from the grape sample. The cold plasma jet device 3 generates power of 400 W to 500 W, the air source pressure is 0.4 MPa to 0.6 MPa, and the drying time is 20 to 30 seconds.

[0082] Step 2: The processed grape samples are placed in a semi-open air source heat pump drying room, with the drying temperature set at 40°C to 50°C and the humidity at 25% to 35% for drying.

[0083] 1. Effects of different growth-promoting treatments on water distribution in grapes

[0084] The effects of the treatment method based on waxy fruit on the water distribution in grapes were compared with the traditional alkali solution soaking (20% NaHCO3). Figure 9 and Figure 10 As shown, the relaxation peaks from left to right represent the three main water components in grapes: bound water (T 21 , 0.01~10ms), not suitable for flowing water (T 22 , 10~100ms), free water (T 23 , 100~1000ms and T 24 , 1000~10000ms). Each relaxation peak area is marked as A 21 、A 22 、A 23 and A 24From the figure, it can be seen that the water in fresh grapes is in the form of free water. After the treatment of the skin-waxy fruit promoting drying method, T 24 Peak area (A 24 ) is significantly different from that of fresh grapes and alkali soaking treatment group, which is the lowest peak area. At this time, most of the free water is evaporated, thereby improving the subsequent drying rate. At the same time, the T2 relaxation peak moves to the left, effectively changing the mobility of water in the grape tissue, and thus being more easily dried and removed in the subsequent drying behavior; a small amount of water that is not easy to flow (peak area A 22 ) appears in the grape tissue after the above skin-waxy fruit promoting drying treatment method, indicating that the internal water molecules have been rearranged, and the free water will flow more easily and be more easily lost. The existence of a small amount of water that is not easy to lose plays a positive role in the quality of raisins.

[0085] 2, Effect of different drying promotion treatments on the drying characteristics of grapes

[0086] Based on the skin-waxy fruit promoting drying treatment method, the effect of traditional alkali soaking (20% NaHCO3) on the drying process of seedless white grapes is shown in Figure 11 As a control group, the drying time of the seedless white grape sample without pretreatment and the seedless white grape sample treated with sodium bicarbonate solution is 34h and 30h, respectively. Compared with the case without pretreatment, the skin-waxy fruit promoting drying treatment method has a significant effect on the drying time of seedless white grapes, and the drying time is 22h, which is 12h less than that of the seedless white grape sample without drying promotion treatment, and the drying time is shortened by 35%, indicating that cold plasma can greatly shorten the drying time.

[0087] Therefore, the device and method for promoting drying treatment based on jet cold plasma provided in the present scheme can cause rapid and efficient dehydration and drying of skin-waxy fruits, and the operation is simple, the conditions are mild, green and safe, the drying rate is high, the treatment speed is fast, and the environment is more friendly.

[0088] Example 2

[0089] The present embodiment provides a skin-waxy fruit promoting drying treatment device 100, which is different from the embodiment 1 only in that the table surface of the loading table 2 is a planar structure, and the fruit to be treated is directly placed on the table surface. During the drying process, the fruit on the table surface remains basically stationary.

[0090] The principle and implementation mode of the utility model are described by applying specific examples, and the above embodiment is only used for helping to understand the method and core idea of the utility model; meanwhile, for the general technical personnel in the field, the specific implementation mode and application range will be changed according to the idea of the utility model. In conclusion, the content of the specification should not be understood as the limitation of the utility model.

Claims

1. An apparatus for epidermal waxy fruit promoting intervention treatment, characterized by, include: base; A loading platform is provided on the base via a connecting piece 1, and the loading platform is used for placing fruits to be processed; A cold plasma jet device is arranged on the base through a second connector. The cold plasma jet device is used to release jet cold plasma toward the stage, so as to utilize the jet cold plasma to destroy the wax on the fruit skin and form a new moisture diffusion channel in the wax on the skin.

2. The apparatus for epidermal waxy fruit promoting intervention treatment according to claim 1, characterized in that, The second connecting member includes a support frame and an adjustment component, the support frame is arranged on the top surface of the base, the adjustment component is arranged on the support frame, and the cold plasma jet device is arranged on the adjustment component; the adjustment component is a linear slide, a two-dimensional slide, a three-dimensional slide or a multi-degree-of-freedom robotic arm, and the adjustment component is used to adjust the spatial position of the cold plasma jet device relative to the stage.

3. The apparatus for epidermal waxy fruit promoting intervention treatment according to claim 2, characterized in that, The support frame is a gantry structure, which is arranged across the top of the loading platform; the adjustment component is arranged on the top crossbeam of the support frame, and the outlet of the cold plasma jet device is facing the loading platform.

4. The apparatus for epidermal waxy fruit promoting intervention treatment according to claim 2 or 3, characterized in that, The table top of the object carrier is a plane.

5. The apparatus for epidermal waxy fruit promoting intervention treatment according to claim 2 or 3, characterized in that, A plurality of rotating rollers are arranged in parallel on the surface of the loading platform, and both ends of any rotating roller are rotatably connected to the loading platform, and the ends of any rotating roller are connected to the rotating drive device. An installation gap is left between any two adjacent rotating rollers, and the width of the installation gap is smaller than the particle size of the fruit to be processed; the fruit to be processed can be placed between any two adjacent rotating rollers, and the rotating drive device is used to drive all the rotating rollers to rotate synchronously in the same direction, so as to drive the fruit to be processed to dynamically flip through the rotating rollers.

6. The apparatus for epidermal waxy fruit promoting intervention treatment according to claim 5, characterized in that, The connecting member 1 is a linear slide, a two-dimensional slide, a three-dimensional slide or a multi-degree-of-freedom robotic arm. The connecting member 1 is arranged on the top surface of the base and is used to adjust the spatial position of the loading platform relative to the base.

7. The apparatus for epidermal waxy fruit promoting intervention treatment according to claim 6, characterized in that, It also includes a control system, which is arranged on the base and is used to control the operating state of at least one of the cold plasma jet device, the adjustment component, the connecting member and the rotary drive device.

8. The apparatus for epidermal waxy fruit promoting intervention treatment according to claim 7, characterized in that, It also includes a power interface, a control handle, a power control button, an emergency stop button, and a reset button, wherein the control handle, the power control button, the emergency stop button, and the reset button are all communicatively connected to the control system, wherein: The control handle is in communication with the control system and is used for remote control of the device; The main power control button is provided on the base and is used to control the device switch; The emergency stop button is provided on the base and is used to realize emergency stop control of the device; The reset button is provided on the base and is used to realize one-touch reset of the device; The power interface is arranged on the base and can be connected to a 220V~16A quick-connect power cord.

9. The apparatus for promoting drying of the epicarp of a waxy fruit according to any one of claims 1 to 3, characterized by The base is a box-type base, and movable panel frame surfaces are provided on the four vertical surfaces of the box-type base. Ventilation holes are provided on a pair of oppositely arranged movable panel frame surfaces of the box-type base, and fences are installed at the ventilation holes.

10. The apparatus for promoting drying of the epicarp of a waxy fruit according to any one of claims 1 to 3, characterized by The air source is connected with the cold plasma jet device through a gas supply pipeline, and a gas pressure stabilizing and filtering device is arranged on the gas supply pipeline.

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