Device for killing parasites and prolonging refreshing time of sashimi food through plasma

Abstract

The invention discloses a device for killing parasites and prolonging the fresh-keeping period of sashimi food through plasmas, relates to the technical field of fresh keeping of sashimi food, and aims to solve the problem that microbial activities cannot be fundamentally inhibited by a traditional fresh-keeping method. Comprising a conveying assembly, a vibration assembly, a plasma generator and a cooling assembly, the conveying assembly comprises a rack and a conveying belt arranged on the rack, and the plasma generator comprises a first polar plate and a second polar plate which are arranged up and down; the vibration assembly is arranged on the rack and enables the conveying belt to vibrate in a mode of intermittently extruding the upper layer of the conveying belt, so that the shielding part of the sashimi food on the conveying belt is exposed; the cooling assembly comprises a cold air input pipe and a cold air exhaust pipe which are fixed to the rack and arranged oppositely. In the conveying process of the sashimi food, the plasma generator is used for generating plasma, active species in the plasma can effectively destroy cell walls and molecular structures of parasites, and efficient killing of the parasites on the sashimi food is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of food preservation, in particular to a device for killing parasites with plasma and prolonging the preservation period of sashimi food. Background Art

[0002] As a raw food, sashimi occupies a place in the world of gourmet food with its unique fresh and tender taste. However, sashimi ingredients such as raw fish grow in the natural environment and are inevitably infected with various parasites. For example, common marine fish may carry Anisakis, and freshwater fish may be infected with parasites such as liver flukes. Traditional processing methods such as simple washing, vinegar pickling or short-term cooling and preservation have very limited effects on the removal of parasites. Washing can only remove some impurities on the surface of the fish body, and cannot penetrate into the fish meat to remove parasites. Although vinegar pickling can change the living environment of parasites to a certain extent, it is difficult to completely kill parasites. The temperature and time of short-term cooling and preservation are often not enough to ensure that all parasites are completely inactivated, and there are still food safety risks.

[0003] At the same time, the preservation of sashimi is also a major problem. Sashimi ingredients are rich in nutrients such as protein and water, and are very easy to deteriorate at room temperature. Microorganisms will multiply rapidly under suitable temperature and humidity conditions, decomposing the nutrients in sashimi, causing the sashimi to rot and stink, which not only affects the taste, but may also produce harmful substances that endanger human health. Traditional preservation methods such as ice preservation or refrigeration preservation can only slow down the growth rate of microorganisms to a certain extent, but cannot fundamentally inhibit microbial activity. The shelf life is relatively short and cannot meet the needs of long-distance transportation and long-term storage of sashimi.

[0004] In view of the severe challenges faced by sashimi food in parasite treatment and preservation, there is an urgent need for a more efficient and reliable processing device to ensure the safety and quality of sashimi food and meet consumers' demand for sashimi food. Summary of the invention

[0005] The purpose of the present invention is to provide a device for killing parasites with plasma and extending the shelf life of sashimi food, so as to solve the problem that the traditional preservation method cannot fundamentally inhibit the activity of microorganisms and has a short shelf life.

[0006] The technical solution adopted by the present invention to solve the technical problem is: a device for killing parasites with plasma and extending the shelf life of sashimi food, comprising a conveying component, a vibration component, a plasma generator and a cooling component, the conveying component comprising a frame and a conveyor belt arranged on the frame, the conveyor belt is a hollow structure, the plasma generator comprises a first pole plate and a second pole plate arranged up and down, the upper layer of the conveyor belt is located between the first pole plate and the second pole plate, the first pole plate and the second pole plate are used to connect a power supply; the vibration component is arranged on the frame to intermittently squeeze the conveyor belt The upper layer makes the conveyor belt vibrate, thereby exposing the covered part of the sashimi food on the conveyor belt; the cooling component includes a cold air input pipe and a cold air exhaust pipe which are fixed on the frame and arranged opposite to each other, and the upper layer of the conveyor belt is located between the cold air input pipe and the cold air exhaust pipe, and the cold air flowing out of the cold air input pipe passes through the upper layer of the conveyor belt and then flows into the cold air exhaust pipe, so as to cool and preserve the sashimi food on the conveyor belt; the cold air input pipe is connected to a cold air source, and cold air containing 90% argon and 10% oxygen is supplied to the cold air input pipe through the cold air source.

[0007] Furthermore, a first insulating layer and a second insulating layer arranged up and down are fixed on the frame, the first electrode plate is fixed on the top of the first insulating layer, and the second electrode plate is fixed on the bottom of the second insulating layer.

[0008] Furthermore, the frame includes two side plates arranged in parallel, and the first insulating layer and the second insulating layer are both located between the two side plates.

[0009] Furthermore, the vibration assembly includes a vibration base, a spring, a vibration top plate and a vibration driving mechanism, the vibration base is fixed on the frame, the vibration top plate is located above the vibration base and the two are connected by a spring, and the vibration driving mechanism is located on the frame or the vibration top plate to drive the vibration of the vibration top plate.

[0010] Furthermore, the vibration drive mechanism includes a vibrator and an eccentric block, the vibrator is fixed on the vibration top plate, the vibrator is a motor, and the eccentric block is fixed on the output shaft of the vibrator.

[0011] Furthermore, it also includes a tilting component, which includes an upper roller, a lower roller and a swinging drive mechanism. The upper roller and the lower roller are arranged up and down with the upper layer of the conveyor belt as the boundary. The swinging drive mechanism is used to drive the upper roller and the lower roller to swing obliquely upward and downward, and the swinging directions of the upper roller and the lower roller are always opposite.

[0012] Furthermore, the upper roller is located at the upper end of the bogie, the lower roller is located at the lower end of the bogie, and the swing drive mechanism drives the bogie to rotate to swing the upper roller and the lower roller.

[0013] Furthermore, the swing drive mechanism includes a steering motor and a steering shaft, the steering motor is fixed on the first side plate, the steering shaft is rotatably mounted on the first side plate, and the end of the steering shaft is fixedly connected to the bogie.

[0014] Furthermore, an acute angle is formed between the axis of the upper roller and the length direction of the conveyor belt, so that the upper roller is tilted relative to the conveyor belt.

[0015] The beneficial effect of the present invention is that in the process of conveying sashimi food by the conveyor belt, the present invention uses a plasma generator to emit plasma, and the active species in the plasma can effectively destroy the cell wall and molecular structure of the parasite, so as to achieve efficient killing of parasites on sashimi food and ensure food safety. In the cooling component, the argon gas carried in the cold air reduces the discharge energy demand and enhances the stability of the plasma, and the oxygen provides oxidative active species. At the same time, the low temperature of 0°C to 4°C inhibits the activity of parasites and the growth of microorganisms, and the humidity of 40%-60% improves the efficiency of plasma active oxygen species generation, which together effectively extend the shelf life of sashimi. The hollow structure of the conveyor belt and the cooperation of the vibration component and the tilting component fully expose all parts of the sashimi to the plasma, avoid parasites from being missed, and ensure the uniformity of the treatment effect. The tilting setting of the upper roller can screen out sashimi food with too large thickness, prevent the internal parasites from being effectively killed due to the sashimi being too thick, and ensure the consistency of product quality. By controlling the conveying speed of the conveyor belt, the processing process of sashimi food can be accurately controlled to meet the processing requirements of sashimi of different types and specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional diagram of the present invention; Figure 2 A three-dimensional diagram of the present invention with one side panel removed; Figure 3 It is a longitudinal cross-sectional view of the present invention; Figure 4 is a transverse cross-sectional view of the present invention; Figure 5 is a structural diagram of the vibration assembly of the present invention; Figure 6 A top view of the present invention; Figure 7 for Figure 5 A partial enlarged view of point A in the figure.

[0017] In the figure: 1 side plate, 2 conveyor belt, 3 first pole plate, 4 second pole plate, 5 first insulating layer, 6 second insulating layer, 7 steering motor, 8 steering shaft, 9 bogie, 10 upper roller, 11 lower roller, 12 inclined section, 13 cold air inlet pipe, 14 cold air outlet pipe, 15 vibration base, 16 spring, 17 vibration top plate, 18 vibrator, 19 eccentric block, 20 sashimi food. DETAILED DESCRIPTION

[0018] like Figures 1 to 7 As shown, a device for killing parasites with plasma and extending the shelf life of sashimi food of the present invention comprises a conveying component, a vibration component, a plasma generator and a cooling component. The structure and working principle of the device for extending the shelf life of sashimi food of the present invention are described in detail below in conjunction with the accompanying drawings.

[0019] like Figures 1 to 7 As shown, a device for killing parasites with plasma and extending the shelf life of sashimi food includes a conveying component, a vibration component, a plasma generator and a cooling component. The conveying component includes a frame and a conveyor belt 2 arranged on the frame, as shown in FIG. Figures 1 to 3 As shown, the frame includes two side plates 1 arranged in parallel, and the two side plates 1 are fixedly connected to form a whole. The conveyor belt 2 is a hollow structure, and there are two rollers between the two side plates 1. The conveyor belt 2 is sleeved on the two rollers. The rotation of the rollers drives the movement of the conveyor belt 2 to realize the conveyance of the sashimi food 20 placed on the conveyor belt 2. The frame is fixed with a first insulating layer 5 and a second insulating layer 6 arranged up and down. The first insulating layer 5 and the second insulating layer 6 are both coated with resin. The first insulating layer 5 and the second insulating layer 6 are both located between the two side plates 1 and fixedly connected to the side plates 1. The plasma generator includes a first plate 3 and a second plate 4 arranged up and down, wherein the first plate 3 is fixed on the top of the first insulating layer 5, and the second plate 4 is fixed on the bottom of the second insulating layer 6. The upper layer of the conveyor belt 2 is located between the first insulating layer 5 and the second insulating layer 6, and also between the first plate 3 and the second plate 4. The first plate 3 and the second plate 4 are used to connect to a power supply. When high voltage electricity is provided by the power supply, the plasma generator generates plasma and distributes it between the first plate 3 and the third plate 4. During the process of conveying the sashimi food 20 by the conveyor belt 2, the sashimi food moves with the conveyor belt 2 to between the first electrode plate 3 and the second electrode plate 4. The active species in the plasma, such as ozone O3 and hydroxyl radicals OH, can effectively destroy the cell wall and molecular structure of the parasites, achieve efficient killing of the parasites on the sashimi food 20, and ensure food safety. A plasma space is formed between the first insulating layer 5 and the second insulating layer 6.

[0020] When the sashimi food 20 is being transported, part of it is blocked by the conveyor belt 2. The sashimi food 20 blocked by the conveyor belt 2 cannot effectively contact the plasma, and the parasites in this part are easily missed. In order to avoid the parasites being missed, the present invention is provided with a vibration component, which vibrates the conveyor belt 2 so that the sashimi food 20 on the upper layer of the conveyor belt 2 is exposed and then contacted with the plasma. Figure 4 , Figure 5 and Figure 7As shown, the vibration assembly is arranged on the frame to intermittently squeeze the upper layer of the conveyor belt 2 so that the conveyor belt 2 vibrates, thereby exposing the shielding part of the sashimi food 20 on the conveyor belt 2. The vibration assembly includes a vibration base 15, a spring 16, a vibration top plate 17 and a vibration drive mechanism, the vibration base 15 is fixed on the frame, that is, between the two side plates 1, and the vibration top plate 17 is located above the vibration base 15 and the two are connected by the spring 16. That is, the upper end of the spring 16 is fixedly connected to the vibration top plate 17, and the lower end of the spring 16 is fixedly connected to the vibration base 15. The vibration drive mechanism is located on the frame or the vibration top plate 17, and is used to squeeze the vibration top plate 17 to achieve vibration. The vibration drive mechanism includes a vibrator 18 and an eccentric block 19, the vibrator 18 is fixed on the vibration top plate 17, the vibrator 18 is a motor, and the eccentric block 19 is fixed on the output shaft of the vibrator 18. After the vibrator 18 is started, the eccentric mass 19 rotates accordingly, and the eccentric mass 19 squeezes / impacts the vibrating top plate 17 in an intermittent knocking manner, thereby achieving vibration.

[0021] In order to cooperate with the vibration component, the vibration of the conveyor belt 2 is realized so that the shielded part of the sashimi food 20 is exposed, which is conducive to plasma treatment. The present invention is also provided with a plurality of equally spaced tilting components, the tilting components include an upper roller 10, a lower roller 11 and a swinging drive mechanism, the upper roller 10 and the lower roller 11 are arranged up and down with the upper layer of the conveyor belt 2 as the boundary, and along the length direction of the conveyor belt 2, the upper roller 10 and the lower roller 11 are multiple groups arranged at equal intervals. The swinging drive mechanism is used to drive the upper roller 10 and the lower roller 11 to swing up and down obliquely, and the swinging directions of the upper roller 10 and the lower roller 11 are always opposite. When the upper roller 10 and the lower roller 11 swing, the upper roller 10 presses the conveyor belt 2 downward, and the lower roller 10 lifts the conveyor belt 2 upward, and then the part of the conveyor belt 2 between the two adjacent tilting components becomes a tilted section 12 arranged obliquely. In order to realize the assembly of the upper roller 10 and the lower roller 11, the tilting component also includes a bogie 9. The upper roller 10 is located at the upper end of the bogie 9, and the lower roller 11 is located at the lower end of the bogie 9. The swing drive mechanism swings the upper roller 10 and the lower roller 11 by driving the rotation of the bogie 9. The swing drive mechanism includes a steering motor 7 and a steering shaft 8. The steering motor 7 is fixed on the first side plate 1, and the steering shaft 8 is rotatably mounted on the first side plate 1. The end of the steering shaft 8 is fixedly connected to the middle of the bogie 9. After the steering motor 7 is started, the steering shaft 8 rotates, and the bogie 9 rotates accordingly. At this time, the upper roller 10 and the lower roller 11 rotate in opposite directions.

[0022] In order to cool and preserve the sashimi food 20, the present invention is also provided with a cooling component, such as Figure 2As shown, the cooling component includes a cold air input pipe 13 and a cold air discharge pipe 14 fixed on the frame and arranged oppositely, and the upper layer of the conveyor belt 2 is located between the cold air input pipe 13 and the cold air discharge pipe 14, and the cold air flowing out of the cold air input pipe 13 passes through the upper layer of the conveyor belt 2 and then flows into the cold air discharge pipe 14, so as to cool down and preserve the sashimi food 20 located on the conveyor belt 2. The cold air input pipe 13 is connected to a cold air source, and cold air containing 90% argon and 10% oxygen is supplied to the cold air input pipe 13 through the cold air source. The center of the cold air input pipe 13 is at the same height as the upper layer of the conveyor belt 2, so that the cold air flowing out of the cold air input pipe 13 can flow through the upper, sideways and lower sides of the sashimi food 20 on the conveyor belt 2, and the cold air flows through the surroundings of the sashimi food 20 to ensure the preservation effect. The cold air discharge pipe 14 is located above the upper layer of the conveyor belt 2, and the cold air blown out of the cold air input pipe 13 is finally discharged through the cold air discharge pipe 14. The cold air discharge pipe 14 is located above the upper layer of the conveyor belt 2, so that the cold air discharged from the cold air input pipe 13 below the sashimi can only pass through the upper layer of the conveyor belt 2 from bottom to top and enter the cold air discharge pipe 14. The hollow structure of the conveyor belt 2 provides a channel for the cold air to pass through the conveyor belt 2.

[0023] In order to pick out the too thick sashimi food 20, the distance between the upper roller 10 and the upper layer of the conveyor belt 2 is changed by adjusting the rotation angle of the steering shaft 8, such as Figure 6 As shown, the upper roller 10 is set to be inclined relative to the length direction of the conveyor belt 2, that is, the axial direction of the upper roller 10 forms an acute angle with the length direction of the conveyor belt 2. Sashimi food 20 with a thickness greater than the distance between the upper roller 10 and the upper layer of the conveyor belt 2 moves along the inclined direction of the upper roller 10 during the process of traveling until it is separated outside the conveyor belt 2, thereby selecting out the too thick sashimi food to prevent the parasites inside the sashimi food 20 from being effectively killed by plasma due to the sashimi food 20 being too thick.

[0024] The settings of the plasma generator and the air conditioner are as follows: For cost and effect considerations, the air conditioner uses 90% argon + 10% oxygen. Argon can reduce the discharge energy demand and enhance the stability of the plasma. Oxygen provides abundant oxidative active species, such as ozone O3 and hydroxyl radicals •OH, which can more effectively destroy the cell wall and molecular structure of parasites and kill parasites. The air conditioner flow rate is controlled at 1 L / min -5 L / min to ensure sufficient concentration of active species and avoid excessive flow causing the surface of the sashimi food 20 to dry or deteriorate. The air conditioner temperature is maintained at the refrigeration temperature, that is, 0°C to 4°C. Low temperature helps to inhibit the activity of parasites and prevent the sashimi food 20 from deteriorating due to temperature rise. The humidity is 40%-60%, which can improve the generation efficiency of plasma active oxygen species and avoid excessive humidity reducing the killing effect. The power of the plasma generator is 1 W / cm² and the frequency is 30 kHz. The time for the sashimi food to pass through the plasma is 3-5 minutes, providing sufficient time for killing.

[0025] The working principle of the present invention is described below: (1) When in use, the sashimi food 20 is placed on the conveyor belt 2, and the conveyor belt 2 conveys the sashimi food 20 during movement. (2) When the sashimi food passes between the first electrode plate 3 and the second electrode plate 4, the plasma generated between the first electrode plate 3 and the second electrode plate 4 contacts the sashimi food 20, thereby inactivating the parasites. (3) When the tilting assembly is working, the steering motor 7 starts to drive the steering shaft 8 to rotate, and then the bogie 9 rotates, and then the upper roller 10 and the lower roller 11 swing in opposite directions, the upper roller 10 presses down the upper layer of the conveyor belt 2, and the lower roller 11 supports the upper layer of the conveyor belt 2, and then the adjacent tilting assemblies cooperate to form a plurality of tilting sections 12 on the upper layer of the conveyor belt 2. At the tilting section 12, when the vibration assembly is working, the vibrator 18 starts to drive the eccentric block 19 to rotate, and the eccentric block 19 hits the vibration top plate 17, and the vibration top plate 17 conflicts with the tilting section 12 of the conveyor belt 2, thereby causing the tilting section 12 to vibrate; under the action of vibration and its own gravity, the sashimi food 20 rolls and slides on the conveyor belt 2, thereby exposing the part where the sashimi food 20 contacts the conveyor belt 2, that is, the blocked part. (4) The cold air flows out through the cold air inlet pipe 13 to between the two side plates 1, and flows through the top, left and right sides and bottom of the sashimi food 20 to cool down and preserve the sashimi food 20; the cold air finally enters the cold air outlet pipe 14, and then flows back to the cold air system. By controlling the conveying speed of the conveyor belt 2 and the vibration frequency of the vibrating top plate 17, the traveling speed of the sashimi food 20 in the plasma space can be controlled, and the part of the sashimi food 20 blocked by the conveyor belt 2 can be exposed to receive plasma to kill parasites.

[0026] In the process of conveying sashimi food 20 by the conveyor belt, the present invention uses a plasma generator to emit plasma, and the active species in the plasma can effectively destroy the cell wall and molecular structure of the parasite, so as to achieve efficient killing of parasites on the sashimi food 20 and ensure food safety. In the cooling component, the argon gas carried in the cold air reduces the discharge energy demand and enhances the stability of the plasma, and the oxygen provides oxidative active species. At the same time, the low temperature of 0°C to 4°C inhibits the activity of parasites and the growth of microorganisms, and the humidity of 40%-60% improves the efficiency of generating plasma active oxygen species, which together effectively extend the shelf life of the sashimi food 20. The hollow structure of the conveyor belt 2 and the cooperation of the vibration component and the tilting component fully expose all parts of the sashimi to the plasma, avoid missing parasites, and ensure the uniformity of the treatment effect. The tilting setting of the upper roller can screen out the sashimi food 20 with too large thickness, prevent the internal parasites from being effectively killed due to the sashimi being too thick, and ensure the consistency of product quality. By controlling the conveying speed of the conveyor belt, the processing process of the sashimi food 20 can be accurately controlled to meet the processing requirements of sashimi food 20 of different types and specifications.

Claims

1. A device for killing parasites with plasma and extending the shelf life of sashimi food, characterized in that: The invention comprises a conveying component, a vibration component, a plasma generator and a cooling component. The conveying component comprises a frame and a conveyor belt arranged on the frame, the conveyor belt is a hollow structure, the plasma generator comprises a first pole plate and a second pole plate arranged up and down, the upper layer of the conveyor belt is located between the first pole plate and the second pole plate, and the first pole plate and the second pole plate are used to connect a power supply; the vibration component is arranged on the frame to vibrate the conveyor belt in a manner of intermittently squeezing the upper layer of the conveyor belt, thereby exposing the shielded part of the sashimi food on the conveyor belt; the cooling component comprises a cold air input pipe and a cold air discharge pipe fixed on the frame and arranged oppositely, and the upper layer of the conveyor belt is located between the cold air input pipe and the cold air discharge pipe, the cold air flowing out of the cold air input pipe passes through the upper layer of the conveyor belt and then flows into the cold air discharge pipe, so as to cool and preserve the sashimi food on the conveyor belt; the cold air input pipe is connected to a cold air source, and cold air containing 90% argon and 10% oxygen is supplied to the cold air input pipe through the cold air source.

2. The device for killing parasites with plasma and extending the shelf life of sashimi food according to claim 1, characterized in that: A first insulating layer and a second insulating layer are fixed on the frame, the first electrode plate is fixed on the top of the first insulating layer, and the second electrode plate is fixed on the bottom of the second insulating layer.

3. The device for killing parasites with plasma and extending the shelf life of sashimi food according to claim 2, characterized in that: The frame comprises two side plates arranged in parallel, and the first insulating layer and the second insulating layer are both located between the two side plates.

4. The device for killing parasites with plasma and extending the shelf life of sashimi food according to claim 3, characterized in that: The vibration assembly includes a vibration base, a spring, a vibration top plate and a vibration driving mechanism. The vibration base is fixed on a frame, the vibration top plate is located above the vibration base and the two are connected by a spring, and the vibration driving mechanism is located on the frame or the vibration top plate to drive the vibration of the vibration top plate.

5. The device for killing parasites with plasma and extending the shelf life of sashimi food according to claim 4, characterized in that: The vibration driving mechanism comprises a vibrator and an eccentric block, wherein the vibrator is fixed on a vibration top plate, the vibrator is a motor, and the eccentric block is fixed on an output shaft of the vibrator.

6. The device for killing parasites with plasma and extending the shelf life of sashimi food according to claim 5, characterized in that: It also includes a tilting component, which includes an upper roller, a lower roller and a swinging drive mechanism. The upper roller and the lower roller are arranged up and down with the upper layer of the conveyor belt as the boundary. The swinging drive mechanism is used to drive the upper roller and the lower roller to swing obliquely upward and downward, and the swinging directions of the upper roller and the lower roller are always opposite.

7. The device for killing parasites with plasma and extending the shelf life of sashimi food according to claim 6, characterized in that: The upper roller is located at the upper end of the bogie, the lower roller is located at the lower end of the bogie, and the swing driving mechanism drives the bogie to rotate so as to swing the upper roller and the lower roller.

8. The device for killing parasites with plasma and extending the shelf life of sashimi food according to claim 7, characterized in that: The swing drive mechanism comprises a steering motor and a steering shaft. The steering motor is fixed on the first side plate. The steering shaft is rotatably mounted on the first side plate. The end of the steering shaft is fixedly connected to the bogie.

9. The device for killing parasites with plasma and extending the shelf life of sashimi food according to claim 8, characterized in that: The axis of the upper roller forms an acute angle with the length direction of the conveyor belt, so that the upper roller is tilted relative to the conveyor belt.

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