Filtering device for beverage production
By designing a filter device for beverage production, the structure of the filter and cross filter chamber used by staggered settings solves the problem of shutdown cleaning caused by the blocking of the filter in the existing technology, extend the production cycle and improves efficiency. Essence
Patent Information
- Application Number
- CN202411791123.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-06
- Publication Date
- 2025-01-24
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
In the production of existing beverages, the filter needs to be shut down for CIP cleaning after blockage, resulting in a short production cycle and low efficiency.
Design a filtering device for beverage production, including two staggered filters and a cross-shaped filter chamber. The filter part can be circumferentially enclosed to form an intermediate chamber. When the volume of the intermediate chamber is reduced to zero, the second The filter moves perpendicular to the axis of the conveying pipe to re-enclose the intermediate chamber with the largest volume.
It extends the service life of the filter device, improves the efficiency of beverage production, and avoids shutdown cleaning caused by filter blockage.
Smart Images
Figure CN119345768A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of filtration and separation, and in particular to a filtration device for beverage production. Background Art
[0002] During the production process of fruit juice drinks, the fruits need to be cleaned and peeled first, then put into the pulping equipment to break the fruits into pulp, and then the pulp is transported to the sterilization equipment through the pipeline for high-temperature sterilization. Next, the juice after high-temperature sterilization is blended, and finally the blended juice is transported to the filling equipment for canning, thus completing the preparation of the fruit juice drink.
[0003] In the process of transporting the pulp to the sterilization equipment through the pipeline, in order to ensure the quality of the pulp, the pulp needs to be filtered to remove large particles, fruit cores or branch stalks in the pulp. To solve this problem, the prior art often sets a filter in the pipeline to filter out impurities (large particles, fruit cores or branch stalks) in the pulp. When it is detected that the output flow of the pipeline is reduced to a certain value, it means that a considerable amount of impurities have been attached to the filter. At this time, the beverage filling system needs to be shut down for CIP cleaning. Due to the defects of the above-mentioned filtering equipment (filter), the production cycle of the beverage is short and the production efficiency is low. To solve this problem, a filtering device for beverage production is proposed. Summary of the invention
[0004] Based on this, it is necessary to provide a beverage production filtering device to address the problems existing in current beverage filtering equipment, so as to solve the problem that after a certain amount of impurities are blocked on the filter net of the pipeline used to transport beverages, the machine can only be shut down for CIP cleaning.
[0005] The above purpose is achieved through the following technical solutions:
[0006] A filtering device for beverage production is used to filter fruit pulp flowing through a conveying pipeline, comprising:
[0007] The outer shell has a filter chamber inside, the filter chamber is cross-shaped, and the outer shell has a feed port and a discharge port respectively, the feed port and the discharge port are both connected to the filter chamber, and the center points of the feed port and the discharge port are both located on the axis of the conveying pipeline;
[0008] A first filter screen, which is arranged in the discharge port and is used to filter the pulp flowing into the discharge port;
[0009] A second filter screen, the second filter screen is arranged in the filter chamber, and the second filter screen is used to filter the pulp before it flows to the first filter screen;
[0010] The meshes of the second filter screen are arranged alternately with the meshes of the first filter screen, the second filter screen is elastic, and partial areas of the first filter screen and the second filter screen can be circumferentially enclosed to form an intermediate chamber;
[0011] The volume of the intermediate chamber is positively correlated with the flow area of the partial area of the second filter screen that circumferentially encloses the intermediate chamber;
[0012] When the volume of the intermediate chamber is reduced to zero, the second filter can move a preset distance in a direction perpendicular to the axis of the conveying pipeline so that the remaining area of the second filter is re-enclosed with the first filter to form an intermediate chamber, and the volume of the re-enclosed intermediate chamber is the maximum value.
[0013] In one embodiment, a sewage outlet is provided in the filter chamber, a solenoid valve is provided in the sewage outlet, a controller is provided between the first filter screen and the second filter screen, and when the volume of the intermediate chamber is reduced to zero, the controller controls the solenoid valve to rotate so that the sewage outlet is in an open state;
[0014] When the volume of the intermediate chamber is non-zero, the controller controls the solenoid valve to rotate so that the sewage outlet is in a closed state.
[0015] In one embodiment, two sewage outlets are provided in the filter chamber, and solenoid valves are provided in the two sewage outlets. A controller is provided between the first filter screen and the second filter screen. When the volume of the middle chamber is reduced to zero, the controller controls the solenoid valve located in front of the running track of the second filter screen to rotate so that the sewage outlet corresponding to the solenoid valve is opened.
[0016] In one embodiment, guide sliders are provided at both ends of the second filter screen, and the guide sliders are slidably abutted against the inner peripheral wall of the filter chamber;
[0017] A communication port is provided on the guide slide block, and the communication port penetrates the guide slide block in a direction perpendicular to the axis of the conveying pipeline.
[0018] In one embodiment, the second filter screen includes a first arc-shaped area and a second arc-shaped area, the first arc-shaped area and the second arc-shaped area are smoothly connected, and the thickness of the junction area between the first arc-shaped area and the second arc-shaped area is greater than the thickness of other areas;
[0019] The side surface circumferentially surrounded by the first filter screen and the second filter screen is an inwardly concave arc surface.
[0020] In one embodiment, the meshes of the first filter screen and the second filter screen are grid holes.
[0021] In one embodiment, the controller includes a travel switch and a magnet. The travel switch is arranged on the first filter screen. There are two magnets, which are arranged in the first arc region and the second arc region of the second filter screen respectively.
[0022] In one embodiment, the housing includes a main shell and a cover plate, the upper end of the main shell is open, and the cover plate is bolted to the opening.
[0023] In one of the embodiments, the filtering device for beverage production further comprises a bracket, and the main shell is arranged on the bracket.
[0024] In one of the embodiments, a valve switch is also provided on the delivery pipeline.
[0025] The beneficial effects of the present invention are:
[0026] The present invention is provided with a first filter and a second filter, and partial areas of the first filter and the second filter can be circumferentially enclosed to form an intermediate chamber. When the area circumferentially enclosed by the second filter and the first filter is severely blocked by impurities in the pulp, the volume of the intermediate chamber is reduced to zero. At this time, after the second filter moves a preset distance in a direction perpendicular to the axis of the conveying pipeline, since the remaining area of the second filter is not severely blocked by impurities, when the remaining area of the second filter is re-circumferentially enclosed with the first filter, the flow area of the second filter is increased, which can ensure that the second filter continues to be used normally for a long time, thereby extending the production cycle of the beverage and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 It is an overall schematic diagram of a filtering device for beverage production of the present invention;
[0028] Figure 2 A front view of a filtering device for beverage production according to the present invention;
[0029] Figure 3 for Figure 2 Middle AA section view;
[0030] Figure 4 for Figure 3 Schematic diagram of the enlarged structure at B in the middle;
[0031] Figure 5 This is a schematic diagram of the structure of a first filter screen in a filtering device for beverage production of the present invention;
[0032] Figure 6 The figure is a schematic diagram of the structure of the second filter screen in a filtering device for beverage production according to the present invention.
[0033] in:
[0034] 100. Shell; 110. Filter chamber; 120. Feed inlet; 130. Discharge outlet; 140. Intermediate chamber; 150. Drain outlet; 160. Solenoid valve; 170. Main housing; 180. Cover plate; 210. First filter screen; 211. Concave arc surface; 220. Second filter screen; 221. Guide slider; 221a. Connecting port; 222. First arc region; 223. Second arc region; 224. Grid hole; 300. Bracket; 400. Delivery pipeline; 500. Valve switch. DETAILED DESCRIPTION
[0035] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.
[0036] The serial numbers of the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing 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 cannot be understood as a limitation to the present invention.
[0037] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0038] like Figure 1-Figure 6As shown, a filtering device for beverage production is used to filter the fruit pulp flowing through the conveying pipeline 400. The filtering device for beverage production includes a shell 100, a first filter screen 210 and a second filter screen 220. A filtering chamber 110 is provided inside the shell 100, and the filtering chamber 110 is cross-shaped. An inlet 120 and an outlet 130 are provided outside the shell 100 respectively. The inlet 120 and the outlet 130 are both connected to the filtering chamber 110, and the center points of the inlet 120 and the outlet 130 are both located on the axis of the conveying pipeline 400. The first filter screen 210 is arranged in the outlet 130 for filtering the fruit pulp flowing into the outlet 130. The second filter screen 220 is arranged in the filter chamber 110, and the second filter screen 220 is used to filter the fruit pulp flowing to The fruit pulp before the first filter 210 is filtered, the mesh holes of the second filter 220 and the mesh holes of the first filter 210 are arranged alternately, the second filter 220 is elastic, and partial areas of the first filter 210 and the second filter 220 can be circumferentially enclosed to form an intermediate chamber 140, and the volume of the intermediate chamber 140 is positively correlated with the flow area of the partial area of the second filter 220 that is circumferentially enclosed to form the intermediate chamber 140. When the volume of the intermediate chamber 140 is reduced to zero, the second filter 220 can move a preset distance in a direction perpendicular to the axis of the conveying pipeline 400, so that the remaining area of the second filter 220 and the first filter 210 are re-enclosed to form the intermediate chamber 140, and the volume of the re-enclosed intermediate chamber 140 is the maximum value.
[0039] In the initial state, the volume of the middle chamber 140 is at the maximum value. At this time, the conveying pipe 400 is opened, so that the pulp enters the filter chamber 110 from the feed port 120. At this time, the impurities in the pulp are blocked on the outside of the second filter screen 220, and the pulp passes through the second filter screen 220 and enters the middle chamber 140. The pulp further passes through the first filter screen 210 and is discharged from the discharge port 130.
[0040] As the amount of impurities accumulated on the outside of the second filter 220 gradually increases, the flow area of the second filter 220 gradually decreases, and the fluid pressure from the fruit pulp on the second filter 220 increases. Since the second filter 220 is elastic, the second filter 220 is deformed by force, so that the volume of the intermediate chamber 140 gradually decreases. When the volume of the intermediate chamber 140 is reduced to zero, it means that the second filter 220 is seriously blocked. At this time, the second filter 220 moves a preset distance in a direction perpendicular to the axis of the conveying pipeline 400, so that the remaining area of the second filter 220 and the first filter 210 are re-enclosed to form the intermediate chamber 140, and the volume of the re-enclosed intermediate chamber 140 is the maximum value. At this time, the fruit pulp can pass through the first filter 210 and the second filter 220 normally, and then be discharged outward from the discharge port 130. It can be understood that after the second filter 220 moves a preset distance in a direction perpendicular to the axis of the conveying pipe 400, since the remaining area of the second filter 220 is not seriously blocked by impurities, when the remaining area of the second filter 220 is re-circumferentially enclosed with the first filter 210, the flow area of the second filter 220 increases, which can ensure that the second filter 220 continues to be used normally for a long time, thereby extending the production cycle of the beverage and improving production efficiency.
[0041] It should be further explained that, in order to drive the second filter screen 220 to move a preset distance in a direction perpendicular to the axis of the conveying pipeline 400, specifically, in this embodiment, a hydraulic cylinder system can be arranged outside the housing 100, so that the telescopic end of the hydraulic cylinder system penetrates into the interior of the filter chamber 110 and is fixedly connected to the second filter screen 220. In addition, a controller is arranged between the first filter screen 210 and the second filter screen 220, so that after the volume of the intermediate chamber 140 is reduced to zero, the controller can control the hydraulic cylinder system to move, thereby driving the second filter screen 220 to move by moving the telescopic rod of the hydraulic cylinder system, so that after the volume of the intermediate chamber 140 is reduced to zero, the second filter screen 220 moves a preset distance in a direction perpendicular to the axis of the conveying pipeline 400. In addition, it should be noted that the telescopic end of the hydraulic cylinder system should be slidably sealed with the housing 100 to prevent the pulp from leaking out.
[0042] In order to be able to promptly remove impurities attached to a partial area of the second filter 220 that is severely clogged, in a further embodiment, a sewage outlet 150 is provided in the filter chamber 110, a solenoid valve 160 is provided in the sewage outlet 150, and a controller is provided between the first filter 210 and the second filter 220. When the volume of the intermediate chamber 140 is reduced to zero, the controller controls the solenoid valve 160 to rotate so that the sewage outlet 150 is in an open state. When the volume of the intermediate chamber 140 is non-zero, the controller controls the solenoid valve 160 to rotate so that the sewage outlet 150 is in a closed state.
[0043] When the volume of the intermediate chamber 140 is reduced to zero, the controller controls the solenoid valve 160 to rotate, and the drain port 150 is in an open state. Since the meshes of the first filter screen 210 and the second filter screen 220 are arranged in an interlaced manner, the pulp cannot pass through the second filter screen 220 and the first filter screen 210, but can only be discharged outward through the drain port 150. At this time, the pulp and impurities in the pulp flow outward through the drain port 150, thereby reducing the content of impurities in the filter chamber 110. When the second filter screen 220 moves a preset distance in a direction perpendicular to the axis of the conveying pipe 400, the pulp is discharged outward through the drain port 150. The second filter screen 220 and the first filter screen 210 are separated so that the remaining area of the second filter screen 220 and the first filter screen 210 are re-enclosed to form the intermediate chamber 140. At this time, the volume of the intermediate chamber 140 is the maximum value, that is, non-zero. Therefore, the controller controls the solenoid valve 160 to rotate so that the sewage outlet 150 is in a closed state. At this time, the fruit pulp is no longer discharged outward through the sewage outlet 150, and at this time, the second filter screen 220 and the first filter screen 210 are re-enclosed circumferentially to form the remaining area of the intermediate chamber 140 is not seriously blocked. Therefore, the fruit pulp continues to flow out from the discharge port 130 after passing through the second filter screen 220 and the first filter screen 210.
[0044] In a further embodiment, two sewage outlets 150 are provided in the filter chamber 110. Specifically, the two sewage outlets 150 are located in the filter chamber 110 and at both ends in a direction perpendicular to the axis of the conveying pipe 400. A solenoid valve 160 is provided in each of the two sewage outlets 150. A controller is provided between the first filter screen 210 and the second filter screen 220. When the volume of the intermediate chamber 140 is reduced to zero, the controller controls the solenoid valve 160 located in front of the running track of the second filter screen 220 to rotate so that the sewage outlet 150 corresponding to the solenoid valve 160 is opened.
[0045] When the chamber volume of the intermediate chamber 140 is reduced to zero, the controller controls the solenoid valve 160 located in front of the running track of the second filter 220 to rotate so that the drain outlet 150 corresponding to the solenoid valve 160 is opened. At this time, as the second filter 220 moves, the area of the second filter 220 with more impurities attached moves close to the drain outlet 150, so that the impurities inside the filter chamber 110 can be quickly discharged outward through the drain outlet 150, so that more impurities can be discharged from the filter chamber 110 before the drain outlet 150 is closed.
[0046] In a further embodiment, Figure 4 As shown, guide sliders 221 are provided at both ends of the second filter screen 220. The guide sliders 221 slide against the inner wall of the filter chamber 110. A connecting port 221a is provided on the guide slider 221. The connecting port 221a passes through the guide slider 221 in a direction perpendicular to the axis of the conveying pipeline 400.
[0047] The guide slider 221 is provided to guide and limit the movement of the second filter screen 220 , so that the second filter screen 220 can move in a direction perpendicular to the axis of the conveying pipeline 400 .
[0048] In a further embodiment, Figure 4 As shown, the second filter screen 220 includes a first arc-shaped area 222 and a second arc-shaped area 223, the first arc-shaped area 222 and the second arc-shaped area 223 are smoothly connected, the thickness of the junction area of the first arc-shaped area 222 and the second arc-shaped area 223 is greater than the thickness of other areas, and the side surface circumferentially enclosed by the first filter screen 210 and the second filter screen 220 is a concave arc surface 211.
[0049] When the amount of impurities attached to the surface of the second filter screen 220 is small, the portion of the second filter screen 220 directly opposite to the first filter screen 210 is the first arc-shaped area 222. At this time, the volume of the intermediate chamber 140 is the maximum, and the intermediate chamber 140 is shuttle-shaped. As the amount of impurities attached to the surface of the first arc-shaped area 222 gradually increases, the flow area of the first arc-shaped area 222 decreases, and the fluid pressure from the pulp on the first arc-shaped area 222 increases. Since the second filter screen 220 is made of elastic material, the second filter screen 220 is deformed by force. The curvature of the first arc-shaped area 222 gradually increases, and the center of the first arc-shaped area 222 gradually approaches the center of the concave arc surface 211, so that the volume of the intermediate chamber 140 gradually decreases. In this process, the elastic force of the second filter screen 220 gradually increases. When the second filter screen 220 is deformed to make the first arc-shaped area 222 reverse, the elastic force of the second filter screen 220 is released, so that the first arc-shaped area 222 at this time quickly adheres to the concave arc surface 211. In this process, the volume of the intermediate chamber 140 is quickly reduced. The second filter 220 is instantly deformed and reset, and a large amount of impurities are separated from the second filter 220 under the action of inertia. At this time, a large amount of impurities are suspended in the filter chamber 110. Next, the controller controls the solenoid valve 160 located in front of the moving track of the second filter 220 to rotate so that the corresponding sewage outlet 150 is opened, and the fruit pulp and impurities begin to flow to the position of the sewage outlet 150 and are discharged outward through the sewage outlet 150. At this time, under the action of fluid pressure, the fruit pulp pushes the guide slider 221 to drive the second filter 220 along the filter chamber 110. The second filter screen 220 moves in a direction perpendicular to the axis of the conveying pipe 400, so that the first arc-shaped area 222 of the second filter screen 220 with more impurities gradually approaches the opened sewage outlet 150, so that the impurities are quickly discharged outward through the sewage outlet 150, and the impurities are prevented from accumulating in the filter chamber 110. After the second filter screen 220 moves a preset distance in a direction perpendicular to the axis of the conveying pipe 400, the second arc-shaped area 223 with less surface impurities and the first filter screen 210 are circumferentially enclosed to form a new intermediate chamber 140, and the sewage outlet 150 is closed. When the amount of impurities attached to the surface of the second arc-shaped area 223 increases to zero volume of the intermediate chamber 140, the sewage outlet 150 on the opposite side is opened, and the guide slider 221 drives the second filter screen 220 to move in the opposite direction by a preset distance, so that the first arc-shaped area 222 is again circumferentially enclosed with the first filter screen 210 to form the intermediate chamber 140. The specific process is the same as the above working process, and will not be repeated here.
[0050] It should also be noted that, in the process of the first arc-shaped area 222 quickly clinging to the concave arc surface 211, the fruit pulp in the middle chamber 140 is rapidly reduced, so that the fruit pulp in the middle chamber 140 can provide a large recoil force to make the impurities attached to the second filter 220 detach from the mesh of the second filter 220, thereby making the impurities fully detached from the second filter 220.
[0051] It should also be noted that the thickness of the boundary area between the first arc region 222 and the second arc region 223 is greater than the thickness of other areas so that the pressure point of the fluid on the second filter screen 220 can be concentrated at the boundary area between the first arc region 222 and the second arc region 223, so that the second filter screen 220 can be elastically reset to switch between the crest surface and the trough surface of the first arc region 222 and the second arc region 223.
[0052] It should also be noted that when there are fewer impurities, since the crest surface of the first arc-shaped area 222 or the second arc-shaped area 223 is facing the flow direction of the pulp, under the guidance of the crest surface of the first arc-shaped area 222 or the second arc-shaped area 223, the impurities will converge from the center of the first arc-shaped area 222 or the second arc-shaped area 223 to both ends, so that the surface of the first arc-shaped area 222 or the second arc-shaped area 223 can gather more impurities, further extending the upper limit of the production cycle.
[0053] In a further embodiment, Figure 5 and Figure 6 As shown, the mesh openings of the first filter screen 210 and the second filter screen 220 are grid holes 224 .
[0054] This arrangement is used so that when the volume of the middle chamber 140 is zero, the first filter 210 and the second filter 220 can cooperate to block this place, thereby limiting the outflow of the pulp from here, so that the pulp and impurities can only be discharged from the drain outlet 150, so as to increase the flow rate of the pulp when it is discharged through the drain outlet 150, so that more impurities can be discharged from the drain outlet 150 along with the pulp.
[0055] In a further embodiment, the controller includes a travel switch and a magnet. The travel switch is disposed on the first filter screen 210 . There are two magnets, which are disposed in the first arc region 222 and the second arc region 223 of the second filter screen 220 , respectively.
[0056] When the first filter 210 fits with the first arc-shaped area 222 or the second arc-shaped area 223, the volume of the intermediate chamber 140 is zero, and the distance between the magnet and the travel switch is reduced to a minimum. At this time, the magnetic signal detected by the travel switch is the strongest. At this time, the travel switch controls the solenoid valve 160, causing the solenoid valve 160 to rotate to open the sewage outlet 150.
[0057] In a further embodiment, the housing 100 includes a main shell 170 and a cover plate 180 . The upper end of the main shell 170 is open, and the cover plate 180 is bolted at the opening.
[0058] When the structure inside the filter chamber 110 is needed, the staff unscrews the bolts and removes the cover plate 180 from the opening. At this time, the opening is open, and the staff can take out the structure inside the filter chamber 110 through the opening.
[0059] In a further embodiment, Figure 1 As shown, the filtering device for beverage production further includes a bracket 300 , and the main shell 170 is disposed on the bracket 300 . The bracket 300 is provided to support the main shell 170 .
[0060] In a further embodiment, Figure 1 As shown, a valve switch 500 is also provided on the conveying pipeline 400 , and the valve switch 500 is provided to control the flow state of the fruit pulp in the conveying pipeline 400 .
[0061] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0062] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.
Claims
1. A filtering device for beverage production, used for filtering fruit pulp flowing through a conveying pipeline, characterized in that: include: The outer shell has a filter chamber inside, the filter chamber is cross-shaped, and the outer shell has a feed port and a discharge port respectively, the feed port and the discharge port are both connected to the filter chamber, and the center points of the feed port and the discharge port are both located on the axis of the conveying pipeline; A first filter screen, which is arranged in the discharge port and is used to filter the pulp flowing into the discharge port; A second filter screen, the second filter screen is arranged in the filter chamber, and the second filter screen is used to filter the pulp before it flows to the first filter screen; The meshes of the second filter screen are arranged alternately with the meshes of the first filter screen, the second filter screen is elastic, and partial areas of the first filter screen and the second filter screen can be circumferentially enclosed to form an intermediate chamber; The volume of the intermediate chamber is positively correlated with the flow area of the partial area of the second filter screen that circumferentially encloses the intermediate chamber; When the volume of the intermediate chamber is reduced to zero, the second filter can move a preset distance in a direction perpendicular to the axis of the conveying pipeline so that the remaining area of the second filter is re-enclosed with the first filter to form an intermediate chamber, and the volume of the re-enclosed intermediate chamber is the maximum value.
2. A filter device for beverage production according to claim 1, characterized in that: The filter chamber is provided with a sewage outlet, a solenoid valve is provided in the sewage outlet, and a controller is provided between the first filter screen and the second filter screen. When the volume of the intermediate chamber is reduced to zero, the controller controls the solenoid valve to rotate so that the sewage outlet is in an open state; When the volume of the intermediate chamber is non-zero, the controller controls the solenoid valve to rotate so that the sewage outlet is in a closed state.
3. A filter device for beverage production according to claim 1, characterized in that: The filter chamber is provided with two sewage outlets, each of which is provided with an electromagnetic valve. A controller is provided between the first filter screen and the second filter screen. When the volume of the middle chamber is reduced to zero, the controller controls the electromagnetic valve located in front of the running track of the second filter screen to rotate so that the sewage outlet corresponding to the electromagnetic valve is opened.
4. A beverage production filtering device according to claim 3, characterized in that: The two ends of the second filter screen are provided with guide sliders, which are in sliding contact with the inner peripheral wall of the filter chamber; A communication port is provided on the guide slide block, and the communication port penetrates the guide slide block in a direction perpendicular to the axis of the conveying pipeline.
5. A filter device for beverage production according to claim 2 or 3, characterized in that: The second filter screen includes a first arc-shaped area and a second arc-shaped area, the first arc-shaped area and the second arc-shaped area are smoothly connected, and the thickness of the junction area between the first arc-shaped area and the second arc-shaped area is greater than the thickness of other areas; The side surface circumferentially surrounded by the first filter screen and the second filter screen is an inwardly concave arc surface.
6. A filter device for beverage production according to claim 5, characterized in that: The meshes of the first filter screen and the second filter screen are grid holes.
7. A filter device for beverage production according to claim 2 or 3, characterized in that: The controller comprises a travel switch and a magnet. The travel switch is arranged on the first filter screen. There are two magnets, which are arranged in the first arc region and the second arc region of the second filter screen respectively.
8. A beverage production filtering device according to claim 1, characterized in that: The housing comprises a main shell and a cover plate. The upper end of the main shell is open, and the cover plate is bolted to the opening.
9. A filter device for beverage production according to claim 8, characterized in that: A bracket is also included, and the main shell is arranged on the bracket.
10. A filter device for beverage production according to claim 1, characterized in that: The conveying pipeline is also provided with a valve switch.