Horizontal air flow guiding device for food hot processing equipment and use method of horizontal air flow guiding device

Abstract

The invention belongs to the technical field of food hot processing equipment, and discloses a horizontal airflow guiding device for food hot processing equipment and a using method thereof.The horizontal airflow guiding device comprises a mounting plate, and a square mounting frame formed by connecting an upper supporting U-shaped plate, two first air grooves and a lower supporting U-shaped plate is fixedly mounted on one surface of the mounting plate; a plurality of second air grooves which are evenly distributed at intervals are fixedly formed in the square installation frame, air guide assemblies are fixedly installed between the first air grooves and the adjacent second air grooves and between every two adjacent second air grooves, and the first air grooves, the second air grooves and the air guide assemblies are distributed in parallel; the device is simple in overall structure, uniform horizontal airflow can be provided in food hot processing equipment, smoke can be uniformly permeated into food when carrying smoke for smoking, the processing quality is improved, and the use effect is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of food thermal processing equipment, and in particular, relates to a horizontal airflow guide device for food thermal processing equipment and a use method thereof. Background Art

[0002] In the field of food processing, in the air-drying and smoking process of flat foods (such as fish, crispy meat, bacon, etc.), traditional equipment mostly uses vertical airflow technology, that is, the airflow perpendicular to the surface of the material is generated by the fan installed at the top or bottom, and the drying and smoking are completed by combining the heat source and the smoke generator. Although this type of equipment can meet basic processing needs, there are multiple technical defects in actual application, which seriously restricts product quality, production efficiency and energy utilization.

[0003] Firstly, the use of vertical airflow leads to uneven airflow distribution, resulting in obvious differences in smoking effects. Due to the effects of gravity and equipment structure limitations, vertical airflow is prone to form a "high in the center - low at the edge" wind speed distribution on the surface of the material: the wind speed in the center is too high, causing the water on the food surface to evaporate too quickly, causing protein denaturation and hardening (such as crusting on the fish skin), and hindering the internal moisture from migrating outward; the wind speed in the edge area decays, the drying rate is insufficient, and microorganisms are easily bred (such as the risk of mildew on the edges of bacon is increased).

[0004] Secondly, the delayed sedimentation in the vertical airflow is uneven. The smoke particles in the vertical airflow are affected by both gravity and airflow entrainment, and are prone to excessive accumulation at the bottom of the equipment, causing the lower material to be over-smoked (benzopyrene content exceeds the standard) and the upper material to be under-smoked (the flavor is bland).

[0005] Furthermore, in food heat processing equipment that uses vertical airflow, hot air forms natural convection from bottom to top due to density difference, and when superimposed with forced vertical air supply, complex vortices are generated. The temperature at the top of the equipment is higher than that at the bottom, resulting in large differences in drying rates at different layers of the same batch of materials. The high-humidity air at the bottom is difficult to be effectively discharged by the vertical airflow, and the local relative humidity (RH) can reach over 85%, prolonging the drying cycle.

[0006] Finally, in food heat processing equipment that uses vertical airflow, wind speed adjustment directly affects the temperature field distribution (for example, increasing the wind speed will lead to insufficient residence time of hot air), and the heating power needs to be compensated frequently, making it difficult to ensure temperature control accuracy; when the vertical airflow carries smoke, it can only penetrate the surface of the material and cannot achieve uniform internal penetration (for example, the phenolic content in the center of a 15mm thick fish fillet is less than 30% of that in the surface layer).

[0007] Therefore, due to the limitations of physical principles, the existing vertical airflow technology has the following unsolvable contradictions in the air-drying and smoking of flat-laid foods: although increasing the wind speed can accelerate drying, it will aggravate surface crusting and energy consumption; reducing the wind speed will extend the cycle and cause the risk of corruption; enhancing smoke adhesion requires reducing the wind speed, but the low-speed airflow cannot effectively suppress smoke escape and pollute the workshop environment; when the vertical airflow system increases the equipment size, the airflow uniformity deteriorates exponentially, limiting industrial application.

[0008] A Chinese patent with application number CN202110636420.9 discloses a beef jerky production process, including four steps of raw material pretreatment, pickling, cooking and smoking, wherein the smoker used in the smoking process includes a smoker body, a liquid storage tank and an atomizer connecting the smoker body and the liquid storage tank; the present invention, through the setting of the atomizer, on the one hand, makes the nozzle of the smoke liquid more uniform, ensures the overall smoking quality of the beef, and avoids the problem of large taste deviation of the same batch of beef jerky; on the other hand, the smoke liquid will not produce ash during the preparation process, and thus will not contain high tar and polycyclic aromatic hydrocarbons and other harmful components, thereby ensuring food safety, and also reducing the problem of bitterness of beef jerky caused by ash, thereby improving the taste of beef jerky; This patent provides a vertical smoke guide tube with multiple horizontal nozzles. Although horizontal smoke can be generated, the smoke is uneven and cannot form a wind curtain due to the restrictions of the nozzle structure, which also reduces the smoking efficiency and affects the food processing effect. Summary of the invention

[0009] The main technical problem to be solved by the present invention is to provide a horizontal airflow guide device for food thermal processing equipment and a method of using the same, which can provide uniform horizontal airflow up and down in the food thermal processing equipment, and can evenly penetrate the smoke into the food when carrying smoke for smoking, thereby improving the processing quality and having a wide range of applications. At the same time, the oil stains generated during the smoking or air-drying process can be collected in a direction, which is convenient for cleaning.

[0010] In order to solve the above technical problems, the present invention provides the following technical solutions: A horizontal airflow guide device for food thermal processing equipment comprises a mounting plate, a square mounting frame connected by an upper supporting U-shaped plate, two first air ducts and a lower supporting U-shaped plate is fixedly mounted on one surface of the mounting plate, a plurality of second air ducts arranged evenly at intervals are fixedly mounted in the square mounting frame, an air guide assembly is fixedly mounted between a first air duct and an adjacent second air duct and between every two adjacent second air ducts, and the first air duct, the second air duct and the air guide assembly are all arranged in parallel; The wind guide assembly includes a wind guide plate with two ends respectively fixedly mounted on the upper supporting U-shaped plate and the lower supporting U-shaped plate, a wave plate is fixedly mounted on the side of the wind guide plate opposite to the first wind slot, and both ends of the wave plate are fixedly mounted on the upper supporting U-shaped plate and the lower supporting U-shaped plate.

[0011] The following is a further optimization of the above technical solution by the present invention: The first air duct comprises a first vertical plate whose two ends are respectively fixedly mounted to an upper supporting U-shaped plate and a lower supporting U-shaped plate, and first duct edges are vertically arranged on both side edges of the first vertical plate.

[0012] Further optimization: a plurality of mounting holes are evenly arranged on the first vertical plate, and a liquid outlet is arranged at a position of the first vertical plate close to the lower supporting U-shaped plate.

[0013] Further optimization: the second air duct includes a second vertical plate whose two ends are respectively fixedly mounted on the upper supporting U-shaped plate and the lower supporting U-shaped plate, and second groove edges are vertically arranged on both side edges of the second vertical plate, and the groove direction of the second air duct is consistent with that of the first air duct.

[0014] Further optimization: A plurality of supporting square tubes for reinforcing the wave plate are fixedly installed on the wave plate, and the plurality of supporting square tubes are evenly spaced.

[0015] Further optimization: the wind guide plate includes a third vertical plate, both ends of which are fixedly mounted on the upper supporting U-shaped plate and the lower supporting U-shaped plate, and a liquid guiding gap is provided between a surface of the third vertical plate away from the wave plate and a groove edge of the lower supporting U-shaped plate.

[0016] Further optimization: inclined plates are fixedly installed on both side edges of the third vertical plate, the inclined plates extend obliquely toward the first wind slot, and a third slot edge is fixedly installed on the other side edge of the inclined plate, and the third slot edge is arranged parallel to the third vertical plate.

[0017] Further optimization: air ducts are arranged between the other side edge of the third groove edge and the adjacent second groove edge, and between the other side edge of the third groove edge and the adjacent first groove edge.

[0018] The present invention also provides a method for using the horizontal airflow guide device for food thermal processing equipment. Based on the above-mentioned horizontal airflow guide device for food thermal processing equipment, the method comprises the following steps: S1. The device is fixedly mounted on the inner wall of the food heat processing equipment close to the windward side through the mounting plate and the mounting hole, and one side of the wave plate is facing the windward side to ensure that the wind flow enters from the wave plate; S2. Turn on the wind source, and the wind flow entering the wave plate flows out from the air duct on the other side of the device under the guidance of the wave plate to form a horizontal airflow, so as to process the food in the food thermal processing equipment accordingly; S3. After the processing is completed, a part of the oily mixture attached to the device flows down along the first vertical plate, the second vertical plate and the third vertical plate to be collected in the lower supporting U-shaped plate, and another part of the oily mixture in the upper supporting U-shaped plate flows down along the air guide plate to be collected in the lower supporting U-shaped plate, and then is cleaned uniformly.

[0019] The present invention adopts the above technical solution and has the following beneficial effects: 1. The present invention adopts the above technical scheme, which is ingenious in conception and reasonable in structure. The horizontal airflow guide device for food heat processing equipment can be used in food heat processing equipment to provide stable horizontal airflow up and down for flat-laid food when it needs to be smoked or air-dried, avoiding the adverse effects of vertical airflow on food processing such as quality degradation, and the device has a wide range of applications, is easy to clean, simple to disassemble and install, and has a wide range of uses. It is convenient to use, can improve the processing quality of food, is safe and reliable, and is easy to manufacture and produce, which can reduce production and use costs and increase economic benefits. 2. By fixing the wave plate in the air guide plate and making the wind flow generated by the wind source enter the wave plate first, under the action of the two adjacent square steel plates of the wave plate, the wind flow enters the two adjacent square steel plates and then enters the air duct, which can ensure that the wind flow is transformed into a stable horizontal airflow that is uniform up and down, and ensures consistency up and down, optimizes the direction of the wind flow, and improves the quality of smoking or air-drying of flat-laid foods in hot processing; after processing, the oil stains generated on the device flow to the lower supporting U-shaped plate for accumulation, and are uniformly treated for easy cleaning.

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure in an embodiment of the present invention; Figure 2 It is a schematic diagram of the overall structure of the embodiment of the present invention; Figure 3 It is a schematic diagram of the back side of the overall structure in an embodiment of the present invention; Figure 4 For the embodiment of the present invention Figure 3 Schematic diagram of the structure at A in the middle; Figure 5 is a cross-sectional view of the overall structure of an embodiment of the present invention; Figure 6 Schematic diagram of the structure of the air guide assembly in an embodiment of the present invention; Figure 7 For the embodiment of the present invention Figure 5 Schematic diagram of the structure at C in the middle; Figure 8 Schematic diagram of wind flow direction in an embodiment of the present invention.

[0022] In the figure: 1. mounting plate; 2. upper supporting U-shaped plate; 3. first air slot; 31. first slot edge; 32. first vertical plate; 33. liquid outlet avoidance port; 34. mounting hole; 4. second air slot; 41. second vertical plate; 42. second slot edge; 5. air guide assembly; 51. air guide plate; 510. third vertical plate; 511. inclined plate; 512. third slot edge; 52. wave plate; 53. supporting square tube; 54. air duct; 55. liquid guide gap; 6. fixing plate; 7. lower supporting U-shaped plate. DETAILED DESCRIPTION

[0023] like Figure 1-8 As shown: A horizontal airflow guide device for food thermal processing equipment includes a mounting plate 1, a square mounting frame connected by an upper supporting U-shaped plate 2, two first air slots 3 and a lower supporting U-shaped plate 7 is fixedly mounted on one surface of the mounting plate 1, a plurality of evenly spaced second air slots 4 are fixedly mounted in the square mounting frame, an air guide assembly 5 is fixedly mounted between a first air slot 3 and an adjacent second air slot 4 and between every two adjacent second air slots 4, and the first air slots 3, the second air slots 4 and the air guide assembly 5 are all arranged in parallel.

[0024] The mounting plate 1 is made of angle steel and is used to fix the device on the side wall of the food thermal processing equipment close to the wind source.

[0025] The upper supporting U-shaped plate 2 and the lower supporting U-shaped plate 7 are arranged symmetrically with each other and are parallel to the mounting plate 1. The upper supporting U-shaped plate 2 and the lower supporting U-shaped plate 7 are supported by U-shaped square steel at the same time. In this design, the upper supporting U-shaped plate 2 and the lower supporting U-shaped plate 7 are set as U-shaped grooves, and the U-shaped grooves of the upper supporting U-shaped plate 2 and the lower supporting U-shaped plate 7 are opposite.

[0026] Both ends of the first wind slot 3 , the second wind slot 4 and the wind guide assembly 5 are fixedly connected to the bottom surfaces of the U-shaped slots of the upper supporting U-shaped plate 2 and the lower supporting U-shaped plate 7 .

[0027] The two first air slots 3 are respectively located at two ends of the upper supporting U-shaped plate 2 and the lower supporting U-shaped plate 7 , and the two first air slots 3 and the upper supporting U-shaped plate 2 and the lower supporting U-shaped plate 7 are arranged perpendicular to each other.

[0028] like Figure 2 As shown, the first air duct 3 includes a first vertical plate 32 whose two ends are respectively fixedly mounted to the upper supporting U-shaped plate 2 and the lower supporting U-shaped plate 7 .

[0029] First groove edges 31 are vertically arranged on both side edges of the first vertical plate 32. In this design, the first wind groove 3 is also configured as a U-shaped groove to facilitate the guidance of the wind flow.

[0030] The first vertical plate 32 is evenly provided with a plurality of mounting holes 34 , through which the device can be fixedly mounted on a side wall of a food thermal processing device close to an air source, further improving the strength of the device in use.

[0031] A liquid outlet 33 is provided at a position of the first vertical plate 32 close to the lower supporting U-shaped plate 7 to facilitate the outflow of the oil-dirty mixed liquid accumulated on the lower supporting U-shaped plate 7 .

[0032] like Figure 3-4 As shown, the second air duct 4 includes a second vertical plate 41 whose two ends are respectively fixedly mounted on the upper supporting U-shaped plate 2 and the lower supporting U-shaped plate 7 , and second duct edges 42 are vertically arranged on both side edges of the second vertical plate 41 .

[0033] With this design, the second air slot 4 is also configured as a U-shaped slot to facilitate airflow guidance.

[0034] The second air slot 4 has the same slot opening direction as the first air slot 3 .

[0035] like Figure 5-8 As shown, the air guide assembly 5 includes an air guide plate 51 whose two ends are respectively fixedly mounted on the upper supporting U-shaped plate 2 and the lower supporting U-shaped plate 7, and a wave plate 52 is fixedly mounted on the surface of the air guide plate 51 opposite to the first wind groove 3, and both ends of the wave plate 52 are fixedly mounted on the upper supporting U-shaped plate 2 and the lower supporting U-shaped plate 7 at the same time.

[0036] In this embodiment, the wave plate 52 is formed into a wave shape by using a plurality of square steel plates that are fixedly connected end to end at a certain angle.

[0037] A plurality of supporting square tubes 53 for reinforcing the wave plate 52 are fixedly mounted on the wave plate 52 , and the plurality of supporting square tubes 53 are evenly spaced.

[0038] The wind guide plate 51 includes a third vertical plate 510 , and both ends of the third vertical plate 510 are fixedly mounted on the upper supporting U-shaped plate 2 and the lower supporting U-shaped plate 7 by spot welding.

[0039] A liquid-conducting gap 55 is provided between a surface of the third vertical plate 510 away from the wave plate 52 and a groove edge of the lower supporting U-shaped plate 7 .

[0040] The accumulated oil in the lower supporting U-shaped plate 7 flows through the liquid guiding gap 55 and then flows out through the liquid outlet avoidance port 33 .

[0041] The liquid outlet avoidance port 33 is connected to a corresponding oil storage device, which is not indicated in the figure. After use, it can be cleaned centrally, which is easy to operate.

[0042] Inclined plates 511 are fixedly mounted on both sides of the third vertical plate 510 , and the inclined plates 511 extend obliquely toward the first air slot 3 .

[0043] A third groove edge 512 is fixedly mounted on the other side of the inclined plate 511 , and the third groove edge 512 is arranged parallel to the third vertical plate 510 .

[0044] In this design, a ventilation slot is formed between the third vertical plate 510, the inclined plate 511 and the third slot edge 512, and the slot opening of the ventilation slot is opposite to the slot openings of the first air slot 3 and the second air slot 4, and the wave plate 52 is fixedly mounted on the slot bottom surface of the ventilation slot; At the same time, the oil accumulated in the U-shaped groove of the upper supporting U-shaped plate 2 enters the ventilation groove. In the case of wind, the oil accumulates at the connection between the inclined plate 511 and the third groove edge 512, and then flows downward to the lower supporting U-shaped plate 7.

[0045] An air duct 54 is disposed between the other side of the third groove edge 512 and the adjacent second groove edge 42 , and between the other side of the third groove edge 512 and the adjacent first groove edge 31 .

[0046] At least one fixing plate 6 is fixedly installed along the length direction on the side of all the first vertical plates 32 and the second vertical plates 41 away from the corrugated plate 52 . The fixing plate 6 is arranged parallel to the mounting plate 1 to enhance the overall strength.

[0047] When the wave plate 52 is in use, wind enters from one side of the wave plate 52. Under the guidance of the multiple square steel plates of the wave plate 52, the wind flow can enter the air duct 54 from between two adjacent square steel plates, thereby achieving uniform and optimized air flow distribution, ensuring that the wind flow can flow out of the air duct 54, and the wind flow is turned into a horizontal direction and remains uniform and stable up and down.

[0048] When in use, the device is fixedly mounted on the side wall of the food thermal processing equipment close to the wind source through the mounting plate 1 and the mounting hole 34 , with one side of the wave plate 52 facing the wind source, so that the wind flow can enter from one side of the wave plate 52 .

[0049] like Figure 8 As shown, under the guiding effect of the two adjacent square steel plates of the wave plate 52, the wind flow coming out of the air duct 54 is then transformed into a horizontal air flow under the mutual effect, and the horizontal air flow has a corresponding effect on the food laid flat in the food thermal processing equipment; During the process, when the smoke-smoking processing equipment is in progress, the horizontal airflow during processing prompts the smoke to smoke the flattened food, thereby increasing the smoke penetration rate on the food. At the same time, when the oily and dirty water vapor generated adheres to the device, a part of it can flow downward along the bottom of the ventilation groove of the air guide plate 51, and a part of it can flow downward along the surface of the first vertical plate 32, the second vertical plate 41 and the third vertical plate 510, and uniformly enter the lower supporting U-shaped plate 7, and then flow out along the liquid guide gap 55 through the liquid outlet avoidance port 33 to the corresponding storage device, which is convenient for cleaning and does not pollute the food processing equipment.

[0050] The device has a simple structure and forms a relatively stable horizontal airflow, and can be used in food processing equipment that performs smoke-smoking or air-drying, thereby increasing the scope of application.

[0051] The present invention also provides a method for using the horizontal airflow guide device for food thermal processing equipment. Based on the above-mentioned horizontal airflow guide device for food thermal processing equipment, the method comprises the following steps: S1, the device is fixedly mounted on the inner wall of the food heat processing equipment close to the windward surface through the mounting plate 1 and the mounting hole 34, and one side of the wave plate 52 is facing the windward surface to ensure that the wind flow enters from the wave plate 52; S2, the wind source is turned on, and the wind flow entering the wave plate 52 flows out from the air duct 54 on the other side of the device under the guidance of the wave plate 52 to form a horizontal airflow, and the food in the food thermal processing equipment is processed accordingly; S3. After the processing is completed, a part of the oily mixture attached to the device flows downward along the first vertical plate 32, the second vertical plate 41 and the third vertical plate 510 to be collected in the lower supporting U-shaped plate 7, and another part of the oily mixture in the upper supporting U-shaped plate 2 flows downward along the wind guide plate 51 to be collected in the lower supporting U-shaped plate 7, and then is cleaned uniformly.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A horizontal airflow guide device for food thermal processing equipment, comprising a mounting plate (1), characterized in that: A square mounting frame connected by an upper supporting U-shaped plate (2), two first air slots (3) and a lower supporting U-shaped plate (7) is fixedly mounted on one surface of the mounting plate (1); a plurality of second air slots (4) arranged at even intervals are fixedly mounted in the square mounting frame; an air guide assembly (5) is fixedly mounted between a first air slot (3) and an adjacent second air slot (4) and between every two adjacent second air slots (4); and the first air slots (3), the second air slots (4) and the air guide assembly (5) are arranged in parallel; The wind guide assembly (5) comprises a wind guide plate (51) whose two ends are respectively fixedly mounted on the upper supporting U-shaped plate (2) and the lower supporting U-shaped plate (7); a wave plate (52) is fixedly mounted on a surface of the wind guide plate (51) opposite to the first wind slot (3); and both ends of the wave plate (52) are simultaneously fixedly mounted on the upper supporting U-shaped plate (2) and the lower supporting U-shaped plate (7).

2. The horizontal airflow guide device for food thermal processing equipment according to claim 1, characterized in that: The first air duct (3) comprises a first vertical plate (32) whose two ends are respectively fixedly mounted to the upper supporting U-shaped plate (2) and the lower supporting U-shaped plate (7), and first duct edges (31) are vertically arranged on both side edges of the first vertical plate (32).

3. The horizontal airflow guide device for food thermal processing equipment according to claim 2, characterized in that: A plurality of mounting holes (34) are evenly arranged on the first vertical plate (32), and a liquid outlet avoidance opening (33) is arranged at a position of the first vertical plate (32) close to the lower supporting U-shaped plate (7).

4. The horizontal airflow guide device for food thermal processing equipment according to claim 3, characterized in that: The second air duct (4) comprises a second vertical plate (41) whose two ends are respectively fixedly mounted on the upper supporting U-shaped plate (2) and the lower supporting U-shaped plate (7), and second groove edges (42) are vertically arranged on both side edges of the second vertical plate (41), and the groove opening direction of the second air duct (4) is consistent with that of the first air duct (3).

5. The horizontal airflow guide device for food thermal processing equipment according to claim 4, characterized in that: A plurality of supporting square tubes (53) for reinforcing the wave plate (52) are fixedly mounted on the wave plate (52), and the plurality of supporting square tubes (53) are arranged at even intervals.

6. The horizontal airflow guide device for food thermal processing equipment according to claim 5, characterized in that: The wind guide plate (51) comprises a third vertical plate (510), the two ends of the third vertical plate (510) being fixedly mounted on the upper supporting U-shaped plate (2) and the lower supporting U-shaped plate (7), and a liquid guiding gap (55) is provided between a surface of the third vertical plate (510) away from the wave plate (52) and a groove edge of the lower supporting U-shaped plate (7).

7. The horizontal airflow guide device for food thermal processing equipment according to claim 6, characterized in that: Both side edges of the third vertical plate (510) are fixedly mounted with inclined plates (511), the inclined plates (511) extending obliquely in the direction of the first air slot (3), and the other side edge of the inclined plate (511) is fixedly mounted with a third slot edge (512), the third slot edge (512) being arranged in parallel with the third vertical plate (510).

8. The horizontal airflow guide device for food thermal processing equipment according to claim 7, characterized in that: An air duct (54) is provided between the other side edge of the third groove edge (512) and the adjacent second groove edge (42), and between the other side edge of the third groove edge (512) and the adjacent first groove edge (31).

9. A method for using a horizontal airflow guide device for food thermal processing equipment, based on the horizontal airflow guide device for food thermal processing equipment according to claim 8, characterized in that: The method of use includes the following steps: S1. The device is fixedly mounted on the inner wall of the food heat processing equipment close to the windward side through the mounting plate (1) and the mounting hole (34), and one side of the wave plate (52) is directed toward the windward side to ensure that the wind flow enters from the wave plate (52); S2, turning on the air source, and the airflow entering the wave plate (52) flows out from the air duct (54) on the other side of the device under the guidance of the wave plate (52) to form a horizontal airflow, so as to perform corresponding processing on the food in the food thermal processing equipment; S3. After the processing is completed, a portion of the oily mixture attached to the device flows downward along the first vertical plate (32), the second vertical plate (41) and the third vertical plate (510) to be collected in the lower supporting U-shaped plate (7), and another portion of the oily mixture in the upper supporting U-shaped plate (2) flows downward along the air guide plate (51) to be collected in the lower supporting U-shaped plate (7), and then is cleaned uniformly.

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