Filter for food production

Abstract

The invention relates to the technical field of liquid filtering equipment, and particularly discloses a filter for food production. Comprising a main body cylinder, a connecting cylinder detachably connected with the main body cylinder, a liquid outlet pipe and a liquid inlet pipe which are arranged on the main body cylinder and the connecting cylinder respectively, a driving part arranged on the main body cylinder, and a lifting assembly arranged in the main body cylinder and driven by the driving part; a filter body driven by a lifting assembly to ascend and descend is arranged in the main body cylinder, a flow guide rod is connected into the liquid inlet pipe in a penetrating mode, the filter body inclines upwards and makes contact with the flow guide rod to filter filtrate, the filter body inclines downwards to filter filter residues, and a filter residue through groove matched with the filter body to incline downwards for use is formed in the main body cylinder. According to the device, the problems that the filtering effect is suddenly reduced and normal passing of liquid is influenced due to the fact that a traditional filter for realizing filtering based on a physical principle has a filtering critical value are solved.

Description

Technical Field

[0001] The present application relates to the technical field of liquid filtration equipment, and specifically discloses a filter for food production. Background Art

[0002] A liquid food filter is a device used to remove unwanted solid particles, impurities or microorganisms in liquids, and plays a crucial role in food and beverage production;

[0003] For example: Beer is mainly made from wheat malt and barley malt, and hops are added. It is brewed through liquid gelatinization and saccharification, and then through liquid fermentation. The saccharification process of beer is to decompose and dissolve the high-molecular storage substances and their decomposition products in malt and auxiliary materials into water under the action of various hydrolytic enzymes in malt, water and heat. After saccharification is completed, the original liquid needs to be filtered through a filtering device to remove malt residues;

[0004] Classified by filtration principle, filter screens, filter cloths, etc. intercept particles larger than the pore size of the filter medium through a physical barrier. Membrane filtration type: such as microfiltration membranes, ultrafiltration membranes, nanofiltration membranes and reverse osmosis membranes, etc., separate molecules or ions of different sizes through membranes with specific pore sizes;

[0005] For the filtration of foods such as fruit juices, wines, and edible oils, filter screen filtration is usually adopted. Because in terms of process and cost, choosing filter screen filtration is the most cost-effective choice. After filter screen filtration, the product quality is improved: effectively removing impurities and particles in the liquid;

[0006] However, for filter screen filtration, the disadvantages are obvious. The principle of the filter screen is: intercept particles larger than the pore size of the filter medium through a physical barrier. These particles with the pore size of the filter medium will stay on the filter screen, but the liquid filtration work is carried out continuously. Therefore, for the filter screen, there is a critical point, that is: when exceeding this critical point, the filtration effect of the filter screen drops sharply and the liquid passing rate starts to drop sharply. At this time, it is necessary to stop the machine and reprocess the filter screen to continue the liquid filtration work, and the filtration efficiency is low. In view of this, the present invention provides a filter for food production to solve the above problems. Summary of the Invention

[0007] The purpose of the present invention is to solve the problem that the traditional filter based on physical principles for filtration has a filtration critical value, which leads to a sharp drop in the filtration effect and affects the normal passage of the liquid.

[0008] To achieve the above object, the present invention provides the following basic solution:

[0009] A filter for food production, comprising a main body cylinder, a connecting cylinder detachably connected to the main body cylinder, a liquid outlet pipe and a liquid inlet pipe respectively arranged on the main body cylinder and the connecting cylinder, a driving member arranged on the main body cylinder, and a lifting assembly driven by the driving member arranged in the main body cylinder;

[0010] A filter body driven to lift by the lifting assembly is arranged in the main body cylinder. A guide rod is connected through the liquid inlet pipe. The filter body is inclined upward to contact the guide rod to filter the filtrate, and the filter body is inclined downward to filter the filter residue. A filter residue through groove for the downward inclination of the filter body is opened on the main body cylinder.

[0011] Furthermore, the main body cylinder is clamped with the connecting cylinder. A sealing sleeve is arranged at the clamping position of the main body cylinder and the connecting cylinder. Liquid collecting boxes for collecting liquid are arranged at the free ends of the liquid outlet pipe and the liquid inlet pipe.

[0012] Furthermore, the driving member is a driving motor. The driving motor is arranged on the same side of the main body cylinder as the liquid outlet pipe. The output shaft of the driving motor penetrates into the main body cylinder and is coaxially connected with a threaded shaft. A slag discharge pipe is threadedly connected to the threaded shaft. The free end of the threaded shaft is rotatably connected with a fixing plate. A limiting rod for moving the slag discharge pipe up and down is also included.

[0013] Furthermore, a rotating bearing is arranged at the rotating connection position of the free end of the threaded shaft and the fixing plate. The fixing plate is fixedly connected in the connecting cylinder. An installation groove is opened on the fixing plate. The liquid inlet pipe is installed through the installation groove.

[0014] Furthermore, the outer side of the slag discharge pipe is connected to the filter body. A first through groove is penetrated on the slag discharge pipe. A first connecting block is arranged in the groove of the first through groove. The limiting rod is installed on the first connecting block. One end of the limiting rod is fixedly connected to the fixing plate, and the other end of the limiting rod passes through the first connecting block and then passes through the slag discharge pipe and is arranged on the filter residue through groove.

[0015] Furthermore, a collecting cylinder is arranged outside the filter residue through groove. The collecting cylinder is magnetically connected to the bottom of the main body cylinder and is used for the filter residue passing through the filter residue through groove. The filter residue through groove is composed of a second through groove and a second connecting block arranged in the groove of the second through groove. The other end of the limiting rod passes through the slag discharge pipe and is arranged on the second connecting block.

[0016] Furthermore, the filter body includes an elastic filter screen, an outer frame and an inner frame. The elastic filter screen is arranged between the outer frame and the inner frame. The inner frame is fixedly connected to the outer side of the slag discharge pipe. The setting height of the first through groove is higher than the setting height of the elastic filter screen. The outer frame is fixedly connected to the inner wall of the main body cylinder.

[0017] Further, an outflow hole is provided at the connection between the liquid outlet pipe and the main body cylinder. The liquid outlet pipe is communicated with the outflow hole. A guide plate is provided at the position of the slag outlet pipe between the first through groove and the second through groove. The guiding end of the guide plate is located directly above the outflow hole, and the guide plate is inclined along the direction of the outflow hole.

[0018] Further, when the slag outlet pipe moves upward, the elastic filter screen tilts upward, and the elastic filter screen contacts the guide rod. The guide rod includes a rod body and a fixing bracket, and the fixing bracket is installed inside the liquid inlet pipe; when the slag outlet pipe moves downward, the elastic filter screen tilts downward, and the position of the first through groove is lower than the lowest position of the elastic filter screen.

[0019] Further, when the position of the first through groove is lower than the lowest position of the elastic filter screen, the flow rate of the liquid collecting box connected to the liquid inlet pipe decreases.

[0020] The principle and effect of this solution are as follows:

[0021] 1. Compared with the prior art, the structure of this device is simple and ingenious. This device solves the problem that traditional filters based on physical principles have a filtration critical value, which leads to a sudden drop in the filtration effect and affects the normal passage of liquids. This device is provided with a lifting component, which realizes the tilting of the filter screen body by using the lifting component. Through the tilting of the filter screen body, two functions of filtering liquids and cleaning filter residues are realized by the filter screen body. That is, the filter screen body in this device can not only realize the basic filtering function of the filter screen, but also can well solve the function of treating filter residue residues without disassembling the filter screen body, thereby avoiding the long-term stay of filter residues on the filter screen body and ensuring that the basic filtering function of the filter screen body is not affected.

[0022] 2. Compared with the prior art, this invention reasonably designs the liquid outlet pipe and the liquid inlet pipe. After the liquid outlet pipe and the liquid inlet pipe are evenly arranged, the liquid falling on the filter screen body can be made uniform. And after this device is vertically arranged, the gravity of the falling liquid is reasonably utilized. Based on the gravity, a guide rod is provided. The guide rod can not only make the liquid fall normally on the filtering body, but also realize the vibration of the guide rod. After the vibration of the guide rod is connected to the filtering body, the filtering body is vibrated. Then, through the vibration of the filtering body, the filter residues staying on it are in a dynamic state, accelerating the passing of the filtered liquid.

[0023] 3. Compared with the prior art, this invention is provided with a liquid outlet pipe and a slag outlet pipe. The liquid outlet pipe and the slag outlet pipe are independent of each other and do not interfere with each other. That is, different tilting angles of the filter screen body correspond to different liquid outlet pipes and slag outlet pipes, thereby realizing the free switching between the two functions of liquid outlet or slag outlet.

[0024] 4. Compared with the prior art, the present invention does not require shutting down the machine to clean the filter residue on the filter body. When cleaning the filter residue, only the flow rate of the liquid inlet pipe needs to be reduced. To a certain extent, the efficiency of filtering the liquid is improved, and it is ensured that the filtering effect of the filter body will not drop suddenly. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0026] Figure 1 FIG. shows a schematic structural diagram of a filter for food production proposed in an embodiment of the present application;

[0027] Figure 2 FIG. shows a partial cross-sectional view of another angle of a filter for food production proposed in an embodiment of the present application; Figure 1 in;

[0028] Figure 3 FIG. shows an installation position diagram of a second through groove in a filter for food production proposed in an embodiment of the present application;

[0029] Figure 4 FIG. shows an installation position diagram of a first through groove in a filter for food production proposed in an embodiment of the present application;

[0030] Figure 5 FIG. shows a front view of a filter for food production proposed in an embodiment of the present application;

[0031] Figure 6 FIG. shows different state diagrams of an elastic filter screen in a filter for food production proposed in an embodiment of the present application;

[0032] Figure 7 FIG. shows a schematic position diagram of a fixing bracket in a filter for food production proposed in an embodiment of the present application;

[0033] Figure 8 FIG. shows different state diagrams of filter residue in a filter for food production proposed in an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following, in combination with the accompanying drawings and preferred embodiments, will detail the specific implementation manners, structures, features, and their effects according to the present invention.

[0035] The reference numerals in the attached drawings of the specification include: main body cylinder 1, connecting cylinder 2, driving motor 3, liquid outlet pipe 4, liquid inlet pipe 5, collection cylinder 6, outflow hole 8, guide plate 9, baffle 10, threaded shaft 11, guide rod 12, fixing plate 13, slag discharge pipe 14, first through groove 15, first connecting block 16, second connecting block 17, second through groove 18, filter residue through groove 19, elastic filter screen 20, outer frame 21, sealing sleeve 22, rotating bearing 23, limiting rod 25, fixed bracket 26, filter residue accumulation 27, filter residue inclination 28, liquid collection tank 29.

[0036] As shown in the embodiment Figures 1-8 as follows:

[0037] A filter for food production includes a main body cylinder 1, a connecting cylinder 2 detachably connected to the main body cylinder 1, a liquid outlet pipe 4 and a liquid inlet pipe 5 respectively arranged on the main body cylinder 1 and the connecting cylinder 2, a driving member arranged on the main body cylinder 1, and a lifting assembly driven by the driving member and arranged in the main body cylinder 1;

[0038] A filter body driven to lift by the lifting assembly is arranged in the main body cylinder 1. A guide rod 12 is connected through the liquid inlet pipe 5. The filter body is inclined upward to contact the guide rod 12 for filtering the filtrate, and the filter body is inclined downward to filter the filter residue. A filter residue through groove 19 for the downward inclination of the filter body is formed on the main body cylinder 1.

[0039] Regarding the detachable connection between the main body cylinder 1 and the connecting cylinder 2, the main body cylinder 1 and the connecting cylinder 2 are connected by clamping, and a sealing sleeve 22 is arranged at the clamping position of the main body cylinder 1 and the connecting cylinder 2. Liquid collection tanks for collecting liquid are arranged at the free ends of the liquid outlet pipe 4 and the liquid inlet pipe 5.

[0040] The sealing sleeve 22 is used to ensure the sealing effect at the connection of the above two parts. The reason for choosing the clamping connection between the main body cylinder 1 and the connecting cylinder 2 is to ensure that the parts inside the main body cylinder 1 can be better disassembled and maintained.

[0041] Regarding the liquid collection tank: As Figures 1-3 shown, multiple liquid outlet pipes 4 and liquid inlet pipes 5 are adopted. The multiple liquid outlet pipes 4 and liquid inlet pipes 5 are for convenient liquid outlet and to avoid repeated accumulation of filter residue at the same position on the filter body. The purpose of setting the liquid collection tank is to enable the multiple liquid outlet pipes 4 and liquid inlet pipes 5 to have the same inlets and outlets respectively.

[0042] The driving member is a driving motor 3. The driving motor 3 is arranged on the same side of the main body cylinder 1 as the liquid outlet pipe 4. The output shaft of the driving motor 3 penetrates into the main body cylinder 1 and is coaxially connected with a threaded shaft 11. A slag discharge pipe 14 is threadedly connected to the threaded shaft 11. The free end of the threaded shaft 11 is rotatably connected with a fixing plate 13. A limiting rod 25 for realizing the up and down movement of the slag discharge pipe 14 is also included.

[0043] Regarding the fixing plate 13: A rotating bearing 23 is provided at the rotating connection between the free end of the threaded shaft 11 and the fixing plate 13. The fixing plate 13 is fixedly connected inside the connecting cylinder 2. The fixing plate 13 is provided with an installation groove, and the liquid inlet pipe 5 is installed through the installation groove.

[0044] The purpose of setting the fixing plate 13 is as follows: Firstly, it provides a connection position for the threaded shaft 11. Secondly, it improves the installation stability of the liquid inlet pipe 5. Since the threaded shaft 11 is rotating, in order to avoid movement interference of the fixing plate 13, the rotating bearing 23 is set, realizing that the fixing plate 13 remains stationary.

[0045] A limiting rod 25 is provided. After the limiting rod 25 is set, the slag discharge pipe 14 no longer rotates with the threaded shaft 11, but moves up and down on the threaded shaft 11.

[0046] The outer side of the slag discharge pipe 14 is connected to the filter body. A first through groove 15 is penetrated through the slag discharge pipe 14. A first connecting block 16 is arranged in the groove of the first through groove 15. The limiting rod 25 is installed on the first connecting block 16. The upper end of the limiting rod 25 is fixedly connected to the fixing plate 13. After the lower end of the limiting rod 25 passes through the first connecting block 16, it then passes through the slag discharge pipe 14 and is arranged on the slag filtering through groove 19.

[0047] Regarding the first through groove 15 and the first connecting block 16: The first through groove 15 is a through groove that reaches the slag filtering through groove 19 directly. The first connecting block 16 is for providing an installation position for the limiting rod 25. Regarding the slag filtering through groove 19:

[0048] A collecting cylinder 6 is arranged outside the slag filtering through groove 19. The collecting cylinder 6 is magnetically connected to the bottom of the main cylinder 1 and is used to collect the slag passing through the slag filtering through groove 19. That is, a magnet ring is arranged at the outer bottom of the main cylinder 1, and the collecting cylinder 6 is connected through the magnet ring. The slag passing through the slag filtering through groove 19 is collected by the collecting cylinder 6.

[0049] The slag filtering through groove 19 is composed of a second through groove 18 and a second connecting block 17 arranged in the groove of the second through groove 18. The other end of the limiting rod 25 passes through the slag discharge pipe 14 and is arranged on the second connecting block 17.

[0050] That is: For the slag, it first enters the first through groove 15, then passes through the slag discharge pipe 14, and finally passes through the second through groove 18 and enters the collecting cylinder 6. An outflow hole 8 is provided at the connection between the liquid outlet pipe 4 and the main cylinder 1. The liquid outlet pipe 4 is communicated with the outflow hole 8. Since the slag filtering through groove 19 is arranged in the same plane as the outflow hole 8, in order to avoid mutual interference between the outflow hole 8 and the slag filtering through groove 19, a diversion plate 9 is provided. Regarding the diversion plate 9:

[0051] A deflector plate 9 is arranged at the position of the slag discharge pipe 14 between the first through groove 15 and the second through groove 18. The deflector plate 9 is fixedly connected to the slag discharge pipe 14, and the deflector end of the deflector plate 9 is directly above the outflow hole 8. The deflector plate 9 is arranged obliquely along the direction of the outflow hole 8.

[0052] That is, for the filter residue, it enters the first through groove 15, then passes through the slag discharge pipe 14, and finally passes through the second through groove 18 and enters the collection cylinder 6.

[0053] For the filtrate, it passes through the filtration body, then is deflected by the deflector plate 9 and enters the outflow hole 8 and finally enters the liquid discharge pipe 4.

[0054] The core of this case lies in the switching of different functions of the filtration body for the filter residue and the filtrate.

[0055] Regarding the filtration body:

[0056] The filtration body includes an elastic filter screen 20, an outer frame 21 and an inner frame. The elastic filter screen 20 is arranged between the outer frame 21 and the inner frame. The inner frame is fixedly connected to the outside of the slag discharge pipe 14. The setting height of the first through groove 15 is higher than the setting height of the elastic filter screen 20. The outer frame 21 is fixedly connected to the inner wall of the main body cylinder 1.

[0057] Specifically: Under the action of the driving motor 3, the slag discharge pipe 14 can move up and down, so the inner frame can move up and down. However, since the outer frame 21 is fixedly connected to the inner wall of the main body cylinder 1, the elastic filter screen 20 can be tilted upward and downward, and the switching of different functions of the filter residue and the filtrate is realized by tilting the elastic filter screen 20 upward and downward.

[0058] When the elastic filter screen 20 is tilted upward, since the setting height of the first through groove 15 is higher than the setting height of the elastic filter screen 20, after the filtrate and the filter residue pass through the liquid inlet pipe 5, they still stay on the elastic filter screen 20. At this time, the filtrate passes through, and the filter residue stays on the elastic filter screen 20. For the filtrate, it is then deflected by the deflector plate 9 and enters the outflow hole 8 and finally enters the liquid discharge pipe 4.

[0059] In this process, in order to accelerate the passage of the filtrate, when the slag discharge pipe 14 moves upward, the elastic filter screen 20 is tilted upward, and the elastic filter screen 20 contacts the deflector rod 12. The deflector rod 12 includes a rod body and a fixed bracket 26. The fixed bracket 26 is installed inside the liquid inlet pipe 5.

[0060] Specifically: Inside the liquid inlet pipe 5, there is a downward movement of the filtrate, with gravitational potential energy. The liquid impacts the fixed support 26, causing the fixed support 26 to vibrate. The vibration force is transmitted through the diversion rod 12 to the elastic filter screen 20, causing the filtrate staying on the elastic filter screen 20 to disperse towards both sides of the diversion rod 12, avoiding the repeated accumulation of filter residues at the same position. Moreover, the diversion rod 12 can divert the filtrate to a certain extent, causing the filtrate to fall on the elastic filter screen 20. Then, a baffle 10 is provided on the outer periphery of the second through groove 18, and the baffle 10 can prevent the mutual influence of the passage of the filtrate and the filter residues.

[0061] After filtering for a period of time, it is necessary to clean the filter residues on the elastic filter screen 20. At this time, through the driving motor 3, the slag discharge pipe 14 moves downward. When the slag discharge pipe 14 moves downward, the elastic filter screen 20 tilts downward until the position of the first through groove 15 is lower than the lowest position of the elastic filter screen 20.

[0062] At this time, there is no influence of the groove height of the first through groove 15 on the right side of the filter residue. As Figure 8 shown, the filter residue accumulation 27 is transformed into the filter residue tilt 28. After the filter residue tilt 28, the filter residue enters the first through groove 15, then passes through the slag discharge pipe 14, and finally passes through the second through groove 18 and enters the collection cylinder 6.

[0063] Regarding the basic settings of the driving motor 3 and the liquid collection tank:

[0064] 1. For the driving motor 3, it is necessary to limit the total number of rotation turns so that the elastic filter screen 20 contacts the diversion rod 12, and the driving motor 3 needs to stop. At the same time, a forward and reverse controller is also required to realize the reverse rotation of the driving motor 3. Secondly, when the slag discharge pipe 14 moves downward a certain distance, the driving motor 3 also needs to stop. Therefore, the total number of rotation turns of the forward and reverse rotation of the driving motor 3 needs to be strictly controlled by the control chip.

[0065] 2. Regarding the liquid collection tank: Since in this case, there is a state where the filter residue accumulation 27 is transformed into the filter residue tilt 28, if the same flow rate is still used for the liquid inlet pipe 5, due to the state of the filter residue tilt 28, if the flow rate is too fast, there will be a phenomenon that both the filtrate and the filter residue enter the collection cylinder 6. Therefore, when implementing the filter residue cleaning function, the liquid collection tank needs to reduce the speed so that the filter residue is processed due to the filter residue tilt 28, and the filtrate enters the liquid outlet pipe 4 through the elastic filter screen 20.

[0066] This device solves the problem that traditional filters based on physical principles for filtration have a filtration critical value, which leads to a sudden drop in the filtration effect and affects the normal passage of the liquid.

[0067] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the disclosed technical content within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A filter for food production, characterized in that: It includes a main body tube, a connecting tube detachably connected to the main body tube, a liquid outlet pipe and a liquid inlet pipe respectively arranged on the main body tube and the connecting tube, a driving member arranged on the main body tube, and a lifting assembly arranged in the main body tube and driven by the driving member; A filter body driven to rise and fall by a lifting assembly is arranged in the main body tube, a guide rod is connected through the liquid inlet pipe, the filter body is tilted upward to contact with the guide rod to filter the filtrate, and the filter body is tilted downward to filter the filter residue, and a filter residue through groove is opened on the main body tube to cooperate with the filter body tilting downward.

2. A filter for food production according to claim 1, characterized in that: The main body tube is clamped with the connecting tube, and a sealing sleeve is arranged at the clamping position of the main body tube and the connecting tube. The free ends of the liquid outlet pipe and the liquid inlet pipe are both provided with a liquid collecting box for collecting liquid.

3. A filter for food production according to claim 1, characterized in that: The driving member is a driving motor, which is arranged on the same side of the main body tube as the liquid outlet pipe. The output shaft of the driving motor passes through the main body tube and is coaxially connected to a threaded shaft. A slag outlet pipe is threadedly connected to the threaded shaft. The free end of the threaded shaft is rotatably connected to a fixed plate, and also includes a limit rod for realizing the up and down movement of the slag outlet pipe.

4. A filter for food production according to claim 3, characterized in that: A rotating bearing is provided at the rotating connection between the free end of the threaded shaft and the fixed plate. The fixed plate is fixed in the connecting tube. The fixed plate is provided with an installation groove, and the liquid inlet pipe is installed in the installation groove.

5. A filter for food production according to claim 3, characterized in that: The outer side of the slag discharge pipe is connected to the filter body, and a first through groove is penetrated through the slag discharge pipe. A first connecting block is arranged in the first through groove, and the limiting rod is installed on the first connecting block. One end of the limiting rod is fixedly connected to the fixing plate, and the other end of the limiting rod passes through the first connecting block and then passes through the slag discharge pipe to be arranged on the filter residue through groove.

6. A filter for food production according to claim 5, characterized in that: A collecting cylinder is arranged on the outside of the filter residue passage, and the collecting cylinder is magnetically connected to the bottom of the main body tube and is used for the filter residue passing through the filter residue passage. The filter residue passage consists of a second passing groove and a second connecting block arranged in the groove of the second passing groove, and the other end of the limiting rod passes through the slag discharge pipe and is arranged on the second connecting block.

7. A filter for food production according to claim 6, characterized in that: The filter body includes an elastic filter screen, an outer frame and an inner frame, the elastic filter screen is arranged between the outer frame and the inner frame, the inner frame is fixedly connected to the outer side of the slag discharge pipe, the setting height of the first passing groove is higher than the setting height of the elastic filter screen, and the outer frame is fixedly connected to the inner wall of the main body tube.

8. A filter for food production according to claim 7, characterized in that: An outflow hole is provided at the connection between the liquid outlet pipe and the main body tube, the liquid outlet pipe is connected to the outflow hole, the slag outlet pipe is provided with a guide plate at a position between the first through groove and the second through groove, the guide end of the guide plate is located directly above the outflow hole, and the guide plate is inclined along the direction of the outflow hole.

9. A filter for food production according to claim 8, characterized in that: When the slag discharge pipe moves upward, the elastic filter screen tilts upward, and the elastic filter screen contacts the guide rod, which includes a rod body and a fixed bracket, and the fixed bracket is installed inside the liquid inlet pipe; when the slag discharge pipe moves downward, the elastic filter screen tilts downward, and the position of the first passing slot is lower than the lowest position of the elastic filter screen.

10. A filter for food production according to claim 9, characterized in that: When the position of the first passing slot is lower than the lowest position of the elastic filter screen, the flow rate of the liquid collecting box connected to the liquid inlet pipe for collecting liquid is reduced.

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