Rice vinegar fermentation device and use method thereof
Through the leveling and compacting components of the rice vinegar fermentation device, the vinegar mash can be automatically leveled and compacted, which solves the problem of low vinegar pouring efficiency, improves the vinegar pouring efficiency and mash uniformity, and is suitable for modern production lines.
Patent Information
- Application Number
- CN202510836514.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-21
- Publication Date
- 2025-09-19
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
In the existing vinegar sprinkling device, the vinegar mash accumulates on the filter plate without being flattened and compacted, resulting in poor sprinkling liquid penetration effect and affecting the vinegar sprinkling efficiency.
A rice vinegar fermentation device is used, including a vinegar sprinkling box, a flattening component, a spraying component and a filter plate. The horizontal moving element drives the push plate to flatten and compact the vinegar mash, and the spraying component is used to perform the vinegar sprinkling operation, realizing a three-stage automated process of flattening-compacting-vinegar sprinkling.
The efficiency of vinegar pouring is improved, the quality fluctuation caused by human factors is reduced, the density uniformity of the mash is improved, the equipment footprint is reduced, and it is suitable for modern continuous production lines.
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Figure CN120665676A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of rice vinegar processing, and in particular to a rice vinegar fermentation device and a use method thereof. Background Art
[0002] Rice vinegar is a traditional acidic condiment made primarily from grains such as rice and glutinous rice through a multi-stage process involving microbial saccharification, alcoholic fermentation, and acetic acid fermentation. Its production has a long history, dating back to ancient Chinese vinegar-making techniques. Through thousands of years of inheritance and development, a unique flavor system and process standards have been developed. Not only does rice vinegar possess a pure sour flavor and rich aroma, it is also rich in amino acids, organic acids, and various trace elements, making it widely applicable in food seasoning, pharmaceuticals, and chemical industries. The core production process of rice vinegar includes raw material pretreatment, saccharification, alcoholic fermentation, acetic acid fermentation, vinegar pouring, and post-processing. The vinegar pouring process is a crucial step in the production process, and through scientific and meticulous operation, it directly influences the flavor, color, and quality of the finished vinegar.
[0003] The existing vinegar sprinkling device includes a filter plate and a spray assembly. The fermented vinegar mash is placed on the filter plate and vinegar is sprinkled on the vinegar mash through the spray assembly, so that the vinegar liquid passes through the filter plate and is collected. However, the vinegar mash accumulates on the filter plate without being flattened and compacted. The sprinkling liquid has poor penetration effect on the vinegar mash, and the vinegar sprinkling process requires a long time, which affects the vinegar sprinkling effect. Summary of the Invention
[0004] In order to solve the above technical problems, the present invention provides a rice vinegar fermentation device and a use method thereof, which can improve the efficiency of vinegar pouring.
[0005] The embodiment of the present invention provides a rice vinegar fermentation device and a method for using the same, comprising: a vinegar pouring box, a paving assembly, a spray assembly, and a filter plate, wherein the filter plate is fixed inside the vinegar pouring box, the paving assembly is fixed above the filter plate, a feed inlet is opened above the vinegar pouring box, and the spray assembly is fixed to the inner side of the top of the vinegar pouring box;
[0006] The tiling assembly includes: a push plate, a horizontal moving element, a support rod and a push rod. The first end of the push rod is connected to the moving end of the horizontal moving element, and the second end of the push rod is hinged to the push plate. The push rod is a retractable rod. The first end of the support rod is connected to the moving end of the horizontal moving element, and the second end of the support rod is hinged to the push plate. The support rod is located below the push rod. The moving direction of the horizontal moving element is the same as the length direction of the filter plate.
[0007] The spray assembly includes: a plurality of spray heads and a spray pipe. The plurality of spray heads are connected to the spray pipe through a rotary joint, and the spray heads face the filter plate.
[0008] Optionally, the horizontal moving element includes: two sets of slide rails and sliders and a base plate, the two sets of slide rails and sliders are symmetrically distributed on both sides of the vinegar pouring box, the two sliders are connected through the base plate, and the first end of the push rod and the first end of the support rod are connected to the base plate.
[0009] Optionally, the base plate is vertically slidably connected to the two sets of sliders.
[0010] Optionally, a discharge port is provided on one side of the vinegar pouring box near the end of the horizontal moving element, and the discharge port is connected to the screen plate through an inclined discharge plate, and an end of the discharge plate near the discharge port is lower than an end near the screen plate.
[0011] Optionally, a liquid collecting trough is further included, which is fixed below the filter plate and has a liquid outlet at one end.
[0012] Optionally, the liquid collecting tank is arranged tilted, with an end of the liquid collecting tank close to the liquid outlet being lower than an end away from the liquid outlet.
[0013] Optionally, the spray head is a fan-shaped nozzle.
[0014] Optionally, a serrated structure is provided at the bottom of the push plate, the serrated structure is an isosceles triangle, and the edge of the push plate is rounded.
[0015] Optionally, the filter plate and push plate can be made of L stainless steel.
[0016] The present invention provides a rice vinegar fermentation device and a method for using the same, comprising the following steps:
[0017] Step 1: The vinegar mash enters the vinegar pouring box through the feed port and is placed on the filter plate. The push rod is parallel to the support rod and has the same length. The push plate is perpendicular to the filter plate and is driven by the moving element to flatten the vinegar mash on the filter plate.
[0018] Step 2: The push rod extends, the support rod remains unchanged, and the push plate changes from a vertical state to a horizontal state. Driven by the moving element, it compacts the vinegar mash on the filter plate;
[0019] Step 3: After compaction, the spraying component is activated to spray vinegar on the vinegar mash;
[0020] Step 4: After pouring vinegar, the vinegar liquid passes through the filter plate and enters the liquid collecting tank below. Under the action of gravity, the vinegar liquid naturally flows to the liquid outlet opened at the lower end of the liquid collecting tank.
[0021] The technical solution provided by the embodiments of the present invention has the following advantages over the prior art: the present invention adopts a mechanical operation mode, and its working process is as follows: first, after the vinegar mash is put into the vinegar sprinkling box through the feed port, the horizontal moving element drives the push plate in a vertical position to reciprocate along the length direction of the filter plate. The push plate evenly flattens the accumulated vinegar mash to form a mash layer of uniform thickness; then, the push rod begins to extend. Because the push rod and the support rod adopt a parallel hinge structure, the push plate is pushed by the push rod to accurately switch from a vertical position to a horizontal position. At this time, the moving element drives the push plate to move again, and the push plate in the horizontal position evenly compacts the mash; finally, the spray assembly fixed to the top of the vinegar sprinkling box is activated, and the vinegar sprinkling liquid is evenly sprayed on the surface of the compacted mash through the spray head, completing the entire vinegar sprinkling process. The present invention realizes the switching of the push plate's working posture through the precise coordination of the push rod and the support rod. The fully mechanical operation not only replaces the traditional manual leveling and compacting processes, eliminates quality fluctuations caused by human factors, and reduces the error in the uniformity of the mash density, but the parallel articulated mechanism enables the push plate to quickly switch between vertical spreading and horizontal compaction working modes. In the vertical state, the push plate and the filter plate ensure that there are no dead angles in the spreading. In the horizontal state, the push plate is in full contact with the mash to ensure the compaction effect. The modular compact design integrates the leveling and compacting functions into a single mobile component, reducing the equipment footprint and improving the vinegar pouring efficiency, which is particularly suitable for modern continuous production lines. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 A schematic diagram of the internal connections of a vinegar shower box provided in an embodiment of the present invention;
[0023] Figure 2 A schematic perspective view of a rice vinegar fermentation device provided by an embodiment of the present invention;
[0024] Figure 3 A top view of a rice vinegar fermentation device provided in an embodiment of the present invention;
[0025] Figure 4 A schematic structural diagram of a bulldozer assembly provided in an embodiment of the present invention;
[0026] Figure 5 A schematic structural diagram of a vinegar shower box provided in an embodiment of the present invention;
[0027] Figure 6 A schematic structural diagram of a push plate provided in an embodiment of the present invention.
[0028] Description of reference numerals:
[0029] 1. Vinegar spray box; 2. Tiling assembly; 3. Spray assembly; 4. Filter plate; 10. Feed inlet; 20. Push plate; 21. Horizontal moving element; 22. Support rod; 23. Push rod; 30. Spray head; 31. Spray pipe; 210. Slide rail; 211. Base plate; 11. Discharge port; 12. Discharge plate; 13. Liquid collecting tank; 14. Liquid outlet; 200. Sawtooth. DETAILED DESCRIPTION
[0030] A specific embodiment of the present invention is described in detail below with reference to the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiment.
[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the technical solutions of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.
[0032] The present invention is described below by means of several specific embodiments. To keep the following description of the embodiments of the present invention clear and concise, detailed descriptions of known functions and components may be omitted. When any component of an embodiment of the present invention appears in more than one drawing, the component may be represented by the same reference numeral in each drawing.
[0033] Figure 1 This is a schematic diagram of the internal connections of the vinegar shower box provided by an embodiment of the present invention. Figure 2 This is a three-dimensional schematic diagram of a rice vinegar fermentation device provided by an embodiment of the present invention. Figure 3 A top view of a rice vinegar fermentation device provided by an embodiment of the present invention. Figure 4 A schematic structural diagram of a bulldozer assembly provided in an embodiment of the present invention. Figure 5 This is a schematic diagram of the structure of the vinegar shower box provided in an embodiment of the present invention. Figure 6 A schematic structural diagram of a push plate provided in an embodiment of the present invention.
[0034] like Figure 1 and Figure 2As shown, the embodiment of the present invention provides a rice vinegar fermentation device and a method for using the same, comprising: a vinegar pouring box 1, a paving assembly 2, a spray assembly 3 and a filter plate 4, the filter plate 4 is fixed inside the vinegar pouring box 1, the paving assembly 2 is fixed above the filter plate 4, a feed inlet 10 is opened above the vinegar pouring box 1, and the spray assembly 3 is fixed to the inner side of the top of the vinegar pouring box 1; the paving assembly 2 comprises: a push plate 20, a horizontal moving element 21, a support rod 22 and a push rod 23, the first end of the push rod 23 is connected to the moving element 21 The movable end is connected, the second end of the push rod 23 is hinged to the push plate 20, the push rod 23 is a retractable rod, the first end of the support rod 22 is connected to the movable end of the horizontal moving element 21, the second end of the support rod 22 is hinged to the push plate 20, the support rod 22 is located below the push rod 23, and the moving direction of the horizontal moving element 21 is the same as the length direction of the filter plate 4; the spray assembly 3 includes: multiple spray heads 30 and spray pipes 31, multiple spray heads 30 are distributed on the spray pipes 31, and the spray heads 30 are facing the filter plate 4.
[0035] Specifically, the spray pipe 31 is U-shaped, and the spray heads 30 are evenly distributed on the U-shaped pipe. Universal ball bearings are used for the hinge.
[0036] The present invention adopts a mechanical operation mode, and its working process can be divided into three key stages: first, after the vinegar mash is put into the vinegar sprinkling box 1 through the feed port 10, the horizontal moving element 21 drives the push plate 20 in a vertical state to reciprocate along the length direction of the filter plate 4, and the flexible scraper at the bottom of the push plate 20 evenly flattens the accumulated vinegar mash to form a mash layer with uniform thickness; then, the push rod 23 begins to extend. Since the push rod 23 and the support rod 22 adopt a parallel hinge structure, the push plate 20 is pushed by the push rod 23 to accurately transform from a vertical state to a horizontal state. At this time, the moving element drives the push plate 20 to move again, and the push plate 20 in the horizontal state evenly compacts the mash; finally, the spray assembly 3 fixed on the top of the vinegar sprinkling box 1 is started, and the vinegar sprinkling liquid is evenly sprayed on the surface of the compacted mash through the spray head 30, completing the entire vinegar sprinkling process. The device's operating logic employs a three-stage automated process of leveling, compacting, and vinegar pouring. The precise coordination of the push rod 23 and the support rod 22 enables the push plate 20 to switch between different working positions. Its core advantage lies in the fact that fully mechanical operation not only completely replaces the traditional manual leveling and compacting processes, but also eliminates quality fluctuations caused by human factors and reduces errors in the uniformity of the mash density. The parallel articulated mechanism enables the push plate 20 to quickly switch between vertical spreading and horizontal compaction modes. In the vertical position, the push plate 20 and the filter plate 4 ensure a seamless spreading process. In the horizontal position, the push plate 20 maintains full contact with the mash to ensure compaction. The modular, compact design integrates the leveling and compacting functions into a single mobile component, reducing the equipment's footprint and improving vinegar pouring efficiency, making it particularly suitable for modern continuous production lines. Furthermore, the device can adapt to the process requirements of different types of vinegar mash by adjusting the stroke and movement speed of the push rod 23, demonstrating excellent process adaptability.
[0037] Optional, reference Figure 4 The horizontal moving element 21 includes: two sets of slide rails and sliders 210 and a base plate 211. The two sets of slide rails and sliders 210 are symmetrically distributed on both sides of the vinegar pouring box 1. The two sliders are connected by the base plate 211. The first end of the push rod 23 and the first end of the support rod 22 are connected to the base plate 211.
[0038] Specifically, the horizontal moving element 21 is driven by a linear motor.
[0039] Optional, reference Figure 4 The base plate 211 is vertically slidably connected to the two sets of sliders.
[0040] Specifically, a sliding groove is provided on the slider, and the base plate 211 is slidably connected in the sliding groove.
[0041] Two sets of slide blocks 210 are symmetrically located on either side of the vinegar sprinkling tank 1, forming a stable dual-track support structure. This prevents the push plate 20 from deflecting or getting stuck during movement, ensuring precise execution of the leveling and compacting operations. A base plate 211 connects the two sliders, evenly distributing the force on the push rod 23 and support rod 22, reducing mechanical wear caused by unilateral loads and extending the equipment's service life. The dual-track design effectively offsets lateral forces generated by the push plate 20 during movement, preventing it from wobbling and ensuring uniform leveling and compaction of the mash. The vertical sliding connection between the base plate 211 and the sliders further reduces frictional resistance, ensuring smoother movement of the push plate 20 and reducing motor load. The slide blocks 210 are standard components, making them easy to replace and reducing maintenance costs. The base plate 211 allows for adjustable height of the push plate 20 to accommodate varying mash thicknesses. This vertical sliding connection allows for fine-tuning of the push plate 20 when necessary, such as for pushing different mash thicknesses or adjusting the compaction pressure. The double-slide rail structure enables the push plate 20 to move faster and more stably, reducing cycle time and improving overall vinegar pouring efficiency.
[0042] Optional, reference Figure 2 A discharge port 11 is provided on one side of the vinegar pouring box 1 near the end of the horizontal moving element 21. The discharge port 11 is connected to the screen plate through an inclined discharge plate 12. The end of the discharge plate 12 near the discharge port 11 is lower than the end near the screen plate.
[0043] The present invention provides a discharge port 11 on one side of the vinegar pouring tank 1 near the end of the horizontal movable element 21. The discharge port 11 is connected to the filter plate 4 via an inclined discharge plate 12, with the end of the discharge plate 12 near the discharge port 11 being lower than the end near the filter plate 4. After the vinegar pouring process is completed, the push-leveling assembly works in conjunction with the discharge port 11 and the discharge plate 12 to achieve automatic discharge: First, the base plate 211 drives the push plate 20 downward, so that the bottom of the push plate 20 tightly abuts the surface of the filter plate 4; then, the horizontal movable element 21 drives the push plate 20 along the length of the filter plate 4, smoothly pushing the vinegar mash out of the vinegar pouring tank 1 via the inclined discharge plate 12. The inclined discharge plate 12 ensures that the vinegar mash slides naturally due to gravity, preventing residue. The push plate 20 and the filter plate 4 work closely together to completely clear the mash. The fully automatic discharge process improves production efficiency and reduces manual intervention.
[0044] Optional, reference Figure 2 , further comprising a liquid collecting trough 13, which is fixed below the filter plate 4, and a liquid outlet 14 is provided at one end of the liquid collecting trough 13.
[0045] Optional, reference Figure 2 The liquid collecting trough 13 is arranged obliquely, and the end of the liquid collecting trough 13 close to the liquid outlet 14 is lower than the end away from the liquid outlet 14.
[0046] After the vinegar is poured, the liquid vinegar passes through the filter plate 4 and enters the liquid collection tank 13 fixed below the filter plate 4. The liquid collection tank 13 adopts a tilted design with an angle of 10°. Under the action of gravity, the vinegar liquid naturally flows to the liquid outlet 14 opened at the lower end of the liquid collection tank 13. The liquid outlet 14 can be connected to a diversion pipe or valve device, so that the vinegar liquid can be collected and transported to a designated container for storage. The tilted liquid collection tank 13 ensures the complete discharge of the vinegar liquid and avoids residue. The centralized liquid outlet 14 is designed to facilitate connection to subsequent processing equipment. The closed collection system maintains a hygienic production environment and can be used with monitoring equipment such as flow meters for precise metering.
[0047] Optional, reference Figure 3 , the spray head 30 is a fan-shaped nozzle.
[0048] The spray head 30 adopts a fan-shaped nozzle, which can make the vinegar liquid evenly cover the vinegar mash on the filter plate 4 with a fan-shaped surface, expand the effective area of a single spray, reduce the spraying dead angle, ensure that the vinegar mash is fully in contact with the vinegar liquid, and improve the efficiency and uniformity of vinegar spraying. At the same time, the fan-shaped spray trajectory can avoid the concentrated impact of liquid on local vinegar mash causing material accumulation or compaction, maintain the structural stability of the vinegar mash, and optimize the fermentation process effect.
[0049] Optional, reference Figure 6 A sawtooth 200 structure is set at the bottom of the push plate 20. The sawtooth 200 is an isosceles triangle, and the edge of the push plate 20 is rounded.
[0050] The push plate 20 is equipped with isosceles triangular serrations 200 at its bottom, along with rounded edges, offering significant advantages. These serrations increase the contact area and friction between the push plate 20 and the mash, effectively cutting and dispersing the mash, preventing clumping and ensuring more even spreading. They also guide the mash toward both sides. The rounded edges also reduce wear on the filter plate 4 and the inner wall of the machine, preventing the mash from being caught by sharp edges. This ensures a smooth pushing process and minimizes material residue and energy loss.
[0051] Optionally, the filter plate 4 and the push plate 20 are made of 316L stainless steel.
[0052] The filter plate 4 and push plate 20 are constructed from 316L stainless steel, offering several advantages. 316L stainless steel's excellent corrosion resistance effectively resists the acidic erosion of rice vinegar fermentation, extending the life of the equipment and ensuring long-term stable operation. Its smooth surface resists the adhesion of mash, facilitating cleaning and maintenance, and minimizing the risk of bacterial growth from residual material. Furthermore, 316L stainless steel's high strength and toughness withstand the mechanical forces exerted by the push plate 20 on the mash, preventing deformation and damage, ensuring reliable device functionality.
[0053] like Figure 1 As shown, an embodiment of the present invention provides a rice vinegar fermentation device and a method for using the same, comprising the following steps: Step 1: The vinegar mash enters the vinegar sprinkling box 1 through the feed port 10 and is placed on the filter plate 4. The push rod 23 is parallel to the support rod 22 and has the same length. The push plate 20 is perpendicular to the filter plate 4 and is driven by a moving element to flatten the vinegar mash on the filter plate 4; Step 2: The push rod 23 is extended, the support rod 22 remains unchanged, the push plate 20 is transformed from a vertical state to a horizontal state, and is driven by a moving element to compact the vinegar mash on the filter plate 4; Step 3: After compaction, the spray assembly 3 is started to spray vinegar on the vinegar mash; Step 4: The vinegar liquid after the vinegar sprinkling passes through the filter plate 4 and enters the liquid collecting tank 13 below. Under the action of gravity, the vinegar liquid naturally flows to the liquid outlet 14 opened at the lower end of the liquid collecting tank 13.
[0054] The above inventions are only several specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the scope of protection of the present invention.
Claims
1. A rice vinegar fermentation device, characterized in that: include: A vinegar sprinkling box (1), a paving assembly (2), a spray assembly (3) and a filter plate (4), wherein the filter plate (4) is fixed inside the vinegar sprinkling box (1), the paving assembly (2) is fixed above the filter plate (4), a feed port (10) is provided above the vinegar sprinkling box (1), and the spray assembly (3) is fixed to the inner side of the top of the vinegar sprinkling box (1); The paving assembly (2) comprises: a push plate (20), a horizontal moving element (21), a support rod (22) and a push rod (23); the first end of the push rod (23) is connected to the moving end of the horizontal moving element (21); the second end of the push rod (23) is hinged to the push plate (20); the push rod (23) is a telescopic rod; the first end of the support rod (22) is connected to the moving end of the horizontal moving element (21); the second end of the support rod (22) is hinged to the push plate (20); the support rod (22) is located below the push rod (23); and the moving direction of the horizontal moving element (21) is the same as the length direction of the filter plate (4); The spray assembly (3) comprises: a plurality of spray heads (30) and a spray pipe (31); the plurality of spray heads (30) are connected to the spray pipe (31) via a rotary joint; the spray heads (30) face the filter plate (4); and the spray pipe (31) is connected to the spray liquid.
2. The rice vinegar fermentation device according to claim 1, wherein The horizontal moving element (21) comprises: two groups of slide rail sliders (210) and a base plate (211); the two groups of slide rail sliders (210) are symmetrically distributed on both sides of the vinegar sprinkling box (1); the two sliders are connected via the base plate (211); and the first end of the push rod (23) and the first end of the support rod (22) are connected to the base plate (211).
3. The rice vinegar fermentation device according to claim 2, wherein The base plate (211) is vertically slidably connected to the two sets of sliders.
4. The rice vinegar fermentation device according to claim 1, wherein A discharge port (11) is provided on one side of the vinegar sprinkling box (1) close to the end of the horizontal moving element (21); the discharge port (11) is connected to the sieve plate via an inclined discharge plate (12); and an end of the discharge plate (12) close to the discharge port (11) is lower than an end close to the sieve plate.
5. The rice vinegar fermentation device according to claim 1, wherein It also includes a liquid collecting trough (13), which is fixed below the filter plate (4), and a liquid outlet (14) is provided at one end of the liquid collecting trough (13).
6. The rice vinegar fermentation device according to claim 5, wherein The liquid collecting trough (13) is arranged obliquely, and one end of the liquid collecting trough (13) close to the liquid outlet (14) is lower than the other end away from the liquid outlet (14).
7. The rice vinegar fermentation device according to claim 1, wherein The spray head (30) is a fan-shaped nozzle.
8. The rice vinegar fermentation device according to claim 5, wherein A sawtooth (200) structure is provided at the bottom of the push plate (20), the sawtooth (200) is an isosceles triangle, and the edge of the push plate (20) is rounded.
9. The rice vinegar fermentation device according to claim 8, wherein The filter plate (4) and the push plate (20) are made of 316L stainless steel.
10. The method for using the rice vinegar fermentation device according to claim 5, wherein: The following steps are involved: Step 1: The vinegar mash enters the vinegar pouring box (1) through the feed port (10) and is placed on the filter plate (4). The push rod (23) is parallel to the support rod (22) and has the same length. The push plate (20) is perpendicular to the filter plate (4). Driven by the moving element, the push plate (20) pushes the vinegar mash on the filter plate (4) flat. Step 2: The push rod (23) is extended, the support rod (22) remains unchanged, and the push plate (20) is transformed from a vertical state to a horizontal state, driven by the moving element to compact the vinegar mash on the filter plate (4); Step 3: After compaction, the spraying component (3) is started to spray vinegar on the vinegar mash; Step 4: The vinegar liquid after pouring the vinegar passes through the filter plate (4) and enters the liquid collecting tank (13) below. Under the action of gravity, the vinegar liquid naturally flows to the liquid outlet (14) opened at the lower end of the liquid collecting tank (13).