A pulsed-matrix electric field device and its application in killing fish liver flukes

Abstract

This invention discloses a pulsed matrix electric field device and its application in killing liver flukes in fish. The device includes an insulating outer shell and an insulating cover movably mounted on the insulating outer shell. Inside the insulating cover is a matrix of stainless steel spring contacts connected to the positive terminal of a power supply. Inside the insulating outer shell is a tray support for holding a stainless steel tray containing sashimi. After the stainless steel tray is placed, it is connected to the negative terminal of the power supply via the tray support. When the insulating cover is fastened onto the insulating outer shell, the stainless steel spring contacts in the stainless steel spring contact matrix make elastic contact with the sashimi. A high-voltage pulsed current is applied to the sashimi by the power supply to kill the liver flukes. This invention can efficiently kill metacercariae in fish meat while maintaining the quality of the fish, laying a solid foundation for the control of liver flukes and having significant implications for the control of Clonorchiasis sinensis. It can also be applied to the control of parasites in other meat products.

Description

Technical Field

[0001] This invention relates to the field of food processing, specifically to a pulsed matrix electric field device and its application in killing fish liver flukes. Background Technology

[0002] Raw fish, also known as sashimi, has a long history in my country, dating back to the Zhou Dynasty. It is mainly consumed in Guangdong, Guangxi, and Taiwan. Fresh fish or shellfish is sliced ​​raw and seasoned with various condiments, resulting in a sweet and delicious dish. Because it is prepared without frying or other cooking methods, it retains all its nutrients, making it a highly nutritious dish enjoyed by many in China.

[0003] However, from a food safety perspective, sashimi may carry parasites. In freshwater fish, the main parasite is the metacercariae of the liver fluke (Clonorchis sinensis). Metacercariae are the larvae (cercariae) of the liver fluke that hatch from snails and parasitize the fish. These metacercariae are mainly distributed in the muscles near the back of the fish's body, which are the primary ingredients in sashimi. Therefore, if sashimi is not properly prepared, it can become a source of liver fluke infection. Adult worms parasitize the bile ducts of humans or other mammals, causing cholangitis, cholecystitis, or liver damage, and in later stages, cirrhosis and ascites.

[0004] The preparation of sashimi is complex and requires high standards from both the operator and the working environment. The characteristics of sashimi slices are that they are thin and sticky; turning them easily causes them to clump together and deform when unfolded again. Therefore, this characteristic necessitates that the sashimi slices not be turned after being arranged, otherwise it is difficult to arrange them neatly again, and the commercial value and appearance of the sashimi slices are greatly reduced. Summary of the Invention

[0005] The purpose of this invention is to provide a pulse matrix electric field device and its application in killing liver flukes in fish, which effectively kills liver flukes while ensuring the taste and marketability of raw fish slices.

[0006] To achieve the above objectives, the present invention employs the following technical solution:

[0007] A pulse matrix electric field device includes an insulating housing and an insulating top cover that is movably mounted on the insulating housing;

[0008] Inside the insulating cover is a stainless steel spring array connected to the positive terminal of the power supply device. Inside the insulating shell is a tray support for placing a stainless steel tray containing sashimi. After the stainless steel tray is placed, it is connected to the negative terminal of the power supply device through the tray support. When the insulating cover is fastened onto the insulating shell, the stainless steel springs in the stainless steel spring array make elastic contact with the sashimi. The power supply device applies a high-voltage pulse current to the sashimi to kill liver flukes in the sashimi.

[0009] Furthermore, the insulating housing has a device cavity on its side for placing the power supply equipment. The insulating cover is installed on the top of the device cavity via a connecting shaft. By rotating the insulating cover, the insulating cover can be fastened to the insulating housing or opened relative to the insulating housing.

[0010] Furthermore, the stainless steel spring matrix is ​​composed of multiple stainless steel spring units, each stainless steel spring unit including an electrode fixing post, on which stainless steel springs are arranged at intervals; the upper end of each stainless steel spring is a ring structure, which is fitted onto the electrode fixing post; the lower end of the stainless steel spring is an upward curved arc structure, which is used to elastically contact the surface of the sashimi; multiple stainless steel spring units are arranged in parallel to form the stainless steel spring matrix.

[0011] Furthermore, in the stainless steel spring matrix, one end of each electrode fixing post is used to connect to the positive terminal of the power supply equipment, and the other end of the electrode fixing post is fixed to the inside of the insulating cover by an insulating bracket.

[0012] Furthermore, the stainless steel spring has a width of 2mm-4mm, a thickness of 0.1-0.2mm, and a height of 3-5mm at the end of its arc-shaped structure.

[0013] Furthermore, the tray support is arranged on the inner wall of the insulating shell. Part or all of the tray support is made of conductive metal material that is connected to the negative terminal of the power supply equipment. The shape of the tray support matches the shape of the stainless steel tray, so that the stainless steel tray can be locked in place after being placed on the tray support to fix the position of the stainless steel tray.

[0014] Furthermore, the power supply equipment includes a boost module, a time controller, a pulse controller, a limit switch, and a manual main switch installed inside the equipment cavity. The outside of the equipment cavity is equipped with an AC power interface and an indicator light for indicating whether the power is on.

[0015] The limit switch is located at the upper end of the insulating shell. After the main manual switch is turned on to connect the mains power, the limit switch is pressed down during the closing of the insulating cover to connect it. At this time, the power supply forms a circuit, the indicator light is lit, and the voltage provided by the mains interface enters the boost module through the time controller. Energy is stored and boosted in the boost module, and then the pulse controller uses the stainless steel spring matrix to discharge the sashimi on the stainless steel tray. The current passes through the sashimi, the stainless steel tray, and the tray support base and returns to the negative terminal of the mains interface, forming a circuit. After the equipment has been working for a preset time, the time controller disconnects the power supply.

[0016] Furthermore, the pulse controller has an output voltage setting range of 5000-10000V, a current of 0.5-1A, and an action time of 60-150ms.

[0017] Furthermore, when no sashimi is placed on the stainless steel tray, the insulating cover is in the closed state, and the stainless steel spring contacts the stainless steel tray; the pulse controller has a short-circuit protection function, so even if the manual main switch is in the open state, the power is still connected through the pulse controller, and the pulse controller does not discharge to the outside.

[0018] Furthermore, a pulsed matrix electric field device and its application in killing fish liver flukes, the application method includes:

[0019] Step 1: Place the sashimi in a stainless steel tray, ensuring that the sashimi completely covers the bottom of the tray.

[0020] Step 2: Connect the mains power interface on the side of the pulse matrix electric field device to the mains power via a wire, and turn on the manual main switch;

[0021] Step 3: Open the insulating cover of the pulse matrix electric field device, place the stainless steel tray on the tray support and fix it in place;

[0022] Step 4: Close the insulating cover. The indicator light on the device will light up. The liver fluke will be killed by electrical pulses discharging electricity onto the raw fish slices. After the preset working time of the equipment, the time controller will disconnect the power, the working light will go out, and the entire device will be powered off. At this time, the entire processing process will end. Open the insulating cover and take out the processed raw fish slices.

[0023] Compared with the prior art, the present invention has the following technical features:

[0024] Given the requirements for sashimi preparation and liver fluke control, this invention utilizes a high-voltage pulsed electric field to kill parasites in the entire plate of sashimi. The process is extremely short, convenient, and quick, with excellent killing effects without affecting the appearance or taste of the sashimi. This invention achieves a killing efficiency of 88.73% within 500ms while maintaining the quality of the fish meat, laying a solid foundation for liver fluke control. The device efficiently kills metacercariae in fish meat with almost no impact on its physicochemical properties, which is of great significance for the control of Clonorchis sinensis. In addition to killing liver flukes in sashimi, this invention can also kill parasites in other meat products. Attached Figure Description

[0025] Figure 1 This is a side view of the device of the present invention in the open state;

[0026] Figure 2 This is a front view of the device of the present invention in the open state;

[0027] Figure 3 This is a side view of the device of the present invention in a closed state;

[0028] Figure 4 This is a schematic diagram showing the interaction between the stainless steel spring matrix and the stainless steel tray.

[0029] Figure 5 This is a structural diagram of the power supply equipment section;

[0030] Figure 6 This is a diagram showing how sashimi is arranged on a stainless steel tray.

[0031] Figure 7 This is a schematic diagram showing the arrangement of stainless steel springs;

[0032] Figure 8 This is a schematic diagram showing the fit between the stainless steel spring and the electrode fixing post;

[0033] Figure 9 This is a schematic diagram showing the combination of a stainless steel spring and a slice of raw fish.

[0034] Figure 10 This is a diagram showing the relationship between the positive and negative terminals of the power supply and the stainless steel spring matrix.

[0035] The following are the labels in the diagram: 1 Insulating outer shell, 2 Insulating top cover, 3 Equipment cavity, 4 Handle, 5 Power supply equipment, 51 Boost module, 52 Time controller, 53 Pulse controller, 54 Limit switch, 55 Manual main switch, 56 Mains interface, 57 Indicator light, 6 Connecting shaft, 7 Stainless steel spring matrix, 71 Electrode fixing post, 72 Stainless steel spring, 73 Insulating bracket, 8 Stainless steel tray, 9 Tray support. Detailed Implementation

[0036] See appendix Figures 1 to 10 The present invention first provides a pulse matrix electric field device, including an insulating shell 1 and an insulating cover 2 movably mounted on the insulating shell 1; in this embodiment, the insulating shell 1 has a device cavity 3 for placing a power supply device 5 on its side, and the insulating cover 2 is mounted on the top of the device cavity 3 through a connecting shaft 6. The insulating cover 2 has a handle 4 on its side. By holding the handle 4 and rotating the insulating cover 2, the insulating cover 2 can be fastened to the insulating shell 1 or opened relative to the insulating shell 1.

[0037] Inside the insulating cover 2, there is a stainless steel spring sheet matrix 7 connected to the positive terminal of the power supply device 5. Inside the insulating shell 1, there is a tray support 9 for placing a stainless steel tray 8 containing sashimi. After the stainless steel tray 8 is placed, it is connected to the negative terminal of the power supply device 5 through the tray support 9. When the insulating cover 2 is fastened onto the insulating shell 1, the stainless steel spring sheets 72 in the stainless steel spring sheet matrix 7 make elastic contact with the sashimi. The power supply device 5 applies a high-voltage pulse current to the sashimi to kill liver flukes in the sashimi.

[0038] It should be noted that, in addition to killing liver flukes in raw fish slices, this invention can also kill parasites in other meat products.

[0039] The main structure and working principle of this application have been explained above. The specific design of each part of this application will be described in detail below with reference to the accompanying drawings.

[0040] 1. Stainless steel spring matrix 7

[0041] The matrix in this scheme is designed to generate a matrix-like positive and negative electric field; the pulse is a current output in the form of a square wave, and the voltage and current magnitude can be adjusted by the pulse controller 53, for example, discharging for 1-2 ms every 3ms interval.

[0042] like Figure 3 , Figure 7 and Figure 8 As shown, the stainless steel spring matrix 7 is composed of multiple stainless steel spring units 72. Each stainless steel spring unit 72 includes an electrode fixing post 71, on which stainless steel springs 72 are arranged at intervals. The upper end of each stainless steel spring 72 is a ring structure, fitted onto the electrode fixing post 71. The lower end of the stainless steel spring 72 is an upward-curving arc structure for elastic contact with the surface of the sashimi. Multiple stainless steel spring units 72 are arranged in parallel to form the stainless steel spring matrix 7. In the stainless steel spring matrix 7, one end of each electrode fixing post 71 is used to connect to the positive terminal of the power supply device 5, and the other end of the electrode fixing post 71 is fixed to the inside of the insulating cover 2 by an insulating bracket 73.

[0043] As a preferred method, the stainless steel spring 72 serves as the positive electrode, with a width of approximately 2mm-4mm and a thickness of approximately 0.1-0.2mm, ensuring good elastic travel and the required strength. Its elastic force is designed to press down on a 1mm piece of raw fish, ensuring good contact without being crushed. Simultaneously, the end of the spring has an upward arc-shaped structure with a height of approximately 3-5mm, which better facilitates contact with the raw fish while preventing it from being snagged when the cover is opened. Within an elastic travel range of 1mm, it can handle raw fish pieces of approximately 1mm-5mm. When the insulating cover 2 is closed, the stainless steel spring 72 ensures that it presses down on the raw fish, ensuring good contact and completing the discharge process.

[0044] The device does not require voltage adjustment when processing sashimi slices with a thickness of less than 5mm. If thicker sashimi slices need to be processed, different specifications of equipment need to be customized. The stroke of the stainless steel spring 72 is lengthened and the gap between it and the stainless steel tray 8 is increased. At the same time, the voltage and power of the boost module 51 are also increased accordingly.

[0045] 2. Stainless steel pallet 8 and pallet support base 9

[0046] The tray support 9 is arranged on the inner wall of the insulating housing 1, for example, as a pair of symmetrically arranged stepped supports; part or all of the tray support 9 is made of conductive metal material connected to the negative terminal of the power supply device 5 to facilitate the formation of a current loop. The shape of the tray support 9 should match the shape of the stainless steel tray 8 so that the stainless steel tray 8 can be locked in place after being placed on the tray support 9 to fix the position of the stainless steel tray 8.

[0047] For example, the stainless steel pallet 8 is a rectangular pallet with edges. After being placed on the pallet support 9, the concave part of the stainless steel pallet 8 is locked onto the pallet support 9 to secure it.

[0048] The stainless steel tray 8 is used to hold sashimi; when the power supply 5 is turned on, the pulse current breaks down the sashimi and returns to the negative terminal of the power supply 5 through the stainless steel tray 8 and the tray support 9.

[0049] 3. Power supply equipment 5

[0050] The power supply device 5 includes a boost module 51, a time controller 52, a pulse controller 53, a limit switch 54, and a manual main switch 55, all located in the device cavity 3. A 220V AC power interface 56 and an indicator light 57 for indicating whether the power is on are provided on the side of the device cavity 3.

[0051] The limit switch 54 is located at the upper end of the insulating shell 1. After the manual main switch 55 is turned on to connect the mains power, the limit switch 54 is pressed down during the closing of the insulating cover 2 to connect it. At this time, the power supply forms a circuit, the indicator light 57 lights up, and the voltage provided by the mains interface 56 enters the boost module 51 through the time controller 52. Energy is stored and boosted in the boost module 51, and then the pulse controller 53 discharges the sashimi on the stainless steel tray 8 through the stainless steel spring matrix 7. The current passes through the sashimi, and returns to the negative terminal of the mains interface 56 through the stainless steel tray 8 and the tray support 9, forming a circuit.

[0052] In this scheme, the voltage is set to a range of 5000-10000V, the current to 0.5-1A, and the action time to 60-150ms, depending on the need to process meat slices of different thicknesses. Since the current time is measured in milliseconds, and considering the heat absorption properties of the stainless steel spring 72 and the stainless steel tray 8, the temperature change of the raw fish slices can be ignored. After the equipment has been in operation for a preset time, such as 2 minutes, the time controller 52 disconnects the power, the work light goes out, and the entire device is powered off. At this point, the entire processing process ends, and the insulated cover 2 is opened to remove the processed raw fish slices.

[0053] The aforementioned manual master switch 55 is the main power switch. The circuit will only be connected after the limit switch 54 is turned on when it is turned on. When the insulating cover 2 is opened, the circuit will not be connected because the limit switch 54 is not triggered. Therefore, the device will not work or be energized, thus ensuring safety during operation.

[0054] When no sashimi is placed on the stainless steel tray 8, the insulating cover 2 is in the closed state, and the stainless steel spring 72 is in contact with the stainless steel tray 8. However, due to the short-circuit protection function of the pulse controller 53, even if the manual main switch 55 is in the open state, the power is connected through the pulse controller 53, and the pulse controller 53 does not discharge to the outside.

[0055] The boost module 51, time controller 52, pulse controller 53, etc. used in this solution are mature commercial products, and the relevant specifications and parameters can be customized according to actual needs.

[0056] A pulsed matrix electric field device and its application in killing fish liver flukes, the application method including:

[0057] Step 1: Place the sashimi in the stainless steel tray 8, ensuring that the sashimi completely covers the bottom of the stainless steel tray 8.

[0058] Step 2: Connect the mains power interface 56 on the side of the pulse matrix electric field device to the mains power through a wire, and turn on the manual main switch 55;

[0059] Step 3: Open the insulating cover 2 of the pulse matrix electric field device, place the stainless steel tray 8 on the tray support 9 and fix it in place;

[0060] Step 4: Close the insulating cover 2. The indicator light 57 of the device will light up. The liver fluke will be killed by the discharge of electrical pulses to the raw fish slices. After the preset working time of the equipment, the time controller 52 will disconnect the power, the working light will go out, and the entire device will be powered off. At this time, the entire processing process will end. Open the insulating cover 2 and take out the processed raw fish slices.

[0061] Example:

[0062] The invention device is applied to fish fillets according to the operating specifications. After operating under the voltage, current and pulse conditions described above, the activity and morphology of the metacercariae are detected under endoscopy, and then physical stimulation is used to detect whether they are dead.

[0063] Clonorchis sinensis metacercariae mortality detection criteria: Under a microscope with a 10*40 field of view, observe the activity and structure of the metacercariae. If the cyst membrane ruptures, the metacercariae are considered dead. If the cyst membrane is deformed and the metacercariae structure is disordered and unclear, apply physical stimulation and observe continuously for 5 minutes. If no metacercariae activity is observed, the metacercariae are considered dead.

[0064] I. Processing Results:

[0065] 1) Process the fish fillets for 60ms and observe the metacercariae after processing. The metacercariae move within the cyst, with no obvious structural changes, but the cyst membrane shows slight deformation.

[0066] 2) After processing the fish fillets for 150ms, the membrane was shrunken, the structure of the postcercariae inside the cyst was disordered, and their activity was very weak after physical stimulation.

[0067] 3) After processing the fish fillets for 500ms, the membrane of the cyst becomes deformed, the structure of the cercariae becomes disordered and unclear, and they become inactive after physical stimulation.

[0068] 4) The fish fillets were processed for 1000ms, and the effect was almost the same as in Example 3. Tiny white spots appeared on the part of the fish meat that was in contact with the electrode, indicating that the texture of the fish meat had changed.

[0069] II. Determination of infectivity of treated metacercariae

[0070] Twelve 180g SD rats were purchased and randomly divided into four groups of three rats each. The four groups served as the control and were used for treatments of 60ms, 150ms, and 500ms, respectively. The SD rats were pre-acclimatized to the environment for three days in the negative pressure laboratory of the Animal Experiment Center of South China Agricultural University.

[0071] Fifty metacercariae were embedded in raw fish slices free of liver fluke infection. After treatment with a high-voltage pulsed electric field, the fish were immediately administered to rats via gavage. One month later, the rats were dissected to examine the presence of adult worms in the hepatobiliary ducts and gallbladder. The results are shown in Table 1.

[0072] Table 1. Verification of the killing experiment using rats.

[0073]

[0074]

[0075] III. Quality Identification and Determination of Fish Meat After Processing Metacercariae

[0076] Muscle quality was measured simultaneously in both the treatment group and the blank control group. Muscle texture properties, including shear force, hardness, brittleness, viscosity, elasticity, chewiness, adhesiveness, cohesiveness, and resilience, were measured using a texture analyzer (Universal TA, Shanghai Turnkey Pull, China). Normality tests were performed on the measured data, and one-way ANOVA and Duncan's multiple comparison test were used to determine the differences between the treatment and control groups. The results are shown in Table 2.

[0077] As shown in Table 2, there were no significant differences between the treatment group and the control group in terms of shear force, hardness, brittleness, viscosity, elasticity, chewiness, adhesiveness, cohesiveness, and resilience (P>0.05), indicating that the above treatment methods did not change the edible quality and muscle texture characteristics of grass carp.

[0078] Table 2 Results of Muscle Quality Measurement

[0079]

[0080] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A pulsed-matrix electric field device, characterized by, Includes an insulating housing (1) and an insulating top cover (2) that is movably mounted on the insulating housing (1); Inside the insulating cover (2) is a stainless steel spring array (7) connected to the positive terminal of the power supply device (5). Inside the insulating shell (1) is a tray support (9) for placing a stainless steel tray (8) containing sashimi. After the stainless steel tray (8) is placed, it is connected to the negative terminal of the power supply device (5) through the tray support (9). When the insulating cover (2) is fastened to the insulating shell (1), the stainless steel springs (72) in the stainless steel spring array (7) make elastic contact with the sashimi. The power supply device (5) applies a high-voltage pulse current to the sashimi to kill liver flukes in the sashimi. The tray support (9) is arranged on the inner wall of the insulating shell (1). Part or all of the tray support (9) is made of a metal conductive material connected to the negative terminal of the power supply device (5). The shape of the tray support (9) matches the shape of the stainless steel tray (8), so that the stainless steel tray (8) can be locked after being placed on the tray support (9) to fix the position of the stainless steel tray (8). The power supply device (5) includes a boost module (51), a time controller (52), a pulse controller (53), a limit switch (54), and a manual main switch (55) installed in the device cavity (3). The outside of the device cavity (3) is provided with an AC power interface (56) and an indicator light (57) for indicating whether the power is on. The limit switch (54) is located at the upper end of the insulating shell (1). When the manual main switch (55) is turned on to connect the mains power, the limit switch (54) is pressed down during the closing of the insulating cover (2) to connect it. At this time, the power supply forms a circuit, the indicator light (57) lights up, and the voltage provided by the mains interface (56) enters the boost module (51) through the time controller (52). Energy is stored and boosted in the boost module (51), and then the pulse controller (53) discharges the fish slices on the stainless steel tray (8) through the stainless steel spring matrix (7). The current passes through the fish slices and returns to the negative terminal of the mains interface (56) through the stainless steel tray (8) and the tray support (9), forming a circuit. After the equipment has been working for a preset time, the time controller (52) disconnects the power supply.

2. The pulsed-matrix electric field device of claim 1, wherein, The insulating housing (1) has a device cavity (3) on its side for placing the power supply device (5). The insulating cover (2) is installed on the top of the device cavity (3) via a connecting shaft (6). By rotating the insulating cover (2), the insulating cover (2) can be fastened to the insulating housing (1) or opened relative to the insulating housing (1).

3. The pulsed-matrix electric field device of claim 1, wherein, The stainless steel spring matrix (7) is composed of multiple stainless steel spring units (72). Each stainless steel spring unit (72) includes an electrode fixing post (71), and stainless steel springs (72) are arranged at intervals on the electrode fixing post (71). The upper end of each stainless steel spring (72) is a ring structure, which is fitted onto the electrode fixing post (71). The lower end of the stainless steel spring (72) is an upward-curving arc structure, which is used to make elastic contact with the surface of the sashimi. Multiple stainless steel spring units (72) are arranged in parallel to form the stainless steel spring matrix (7).

4. The pulsed-matrix electric field device of claim 1, wherein, In the stainless steel spring matrix (7), one end of all electrode fixing posts (71) is used to connect to the positive terminal of the power supply device (5), and the other end of the electrode fixing posts (71) is fixed to the inside of the insulating cover (2) by the insulating bracket (73).

5. The pulsed-matrix electric field device of claim 1, wherein, The stainless steel spring (72) has a width of 2mm-4mm and a thickness of 0.1-0.2mm. The arc-shaped end of the stainless steel spring (72) has a height of 3-5mm.

6. The pulsed-matrix electric field device of claim 1, wherein, The pulse controller (53) has an output voltage setting range of 5000-10000V, a current of 0.5-1A, and an action time of 60-150ms.

7. The pulsed-matrix electric field device of claim 1, wherein, When no sashimi is placed on the stainless steel tray (8), the insulating cover (2) is closed, and the stainless steel spring (72) is in contact with the stainless steel tray (8). The pulse controller (53) has a short circuit protection function. Even if the manual main switch (55) is open, the power is connected through the pulse controller (53), and the pulse controller (53) does not discharge to the outside.

8. Use of the pulsed-matrix electric field device of claim 1 for killing fish liver flukes, characterized in that, The application method includes: Step 1: Place the sashimi in the stainless steel tray (8), ensuring that the sashimi completely covers the bottom of the stainless steel tray (8); Step 2: Connect the mains power interface (56) on the side of the pulse matrix electric field device to the mains power through a wire, and turn on the manual main switch (55); Step 3: Open the insulating cover (2) of the pulse matrix electric field device, place the stainless steel tray (8) on the tray support (9) and fix it in place; Step 4: Close the insulating cover (2), the indicator light (57) of the device will light up, and the liver fluke will be killed by the electric pulse on the raw fish slices; after the device has been working for a preset time, the time controller (52) will disconnect the power, the working light will go out, the whole device will be powered off, and the whole process will end. Open the insulating cover (2) and take out the processed raw fish slices.

Images