A multi-stage filtering kitchen machine

Abstract

The present application relates to a multi-stage filtering kitchen appliance, and relates to the technical field of kitchen waste treatment equipment. The kitchen appliance includes a water inlet pipe, a water outlet pipe, and a plurality of filter units, wherein the water inlet pipe, the plurality of filter units, and the water outlet pipe are connected in sequence; the filter unit includes a cylindrical shell and a filter element, the cylindrical shell is connected to a sewage pipe and a clean water pipe, the filter element is located in the cylindrical shell, the clean water pipe is detachably connected to the filter element, and the filter element is connected to the clean water pipe; the sewage pipe is connected to the clean water pipe of another adjacent filter unit, the water inlet pipe is connected to the sewage pipe of the adjacent filter unit, and the water outlet pipe is connected to the clean water pipe of the adjacent filter unit; the cylindrical shell includes a top pipe, an intermediate extension pipe, and a bottom pipe, the water inlet pipe and the sewage pipe are both connected to the top pipe, the top pipe, the intermediate extension pipe, and the bottom pipe are coaxially detachably connected in sequence, and the intermediate extension pipe can adjust its own length along its own axial direction. The filtration efficiency of the filter unit of the present application can be adjusted according to actual requirements, thereby enabling the kitchen appliance to adapt to different sewage treatment requirements.

Description

Technical Field

[0001] The present application relates to the technical field of food waste treatment equipment, and in particular to a multi-stage filtering food waste treatment machine. Background Art

[0002] As an important kitchen aid, food processors are widely used in homes and businesses, primarily for processing food waste and effectively filtering the resulting wastewater for discharge. With increasing environmental awareness and technological advancements, the functionality of food processors has evolved from a single waste shredder to a comprehensive treatment system that integrates shredding, filtration, and purification. Especially in large-scale catering operations and centralized food waste treatment facilities, efficient wastewater filtration has become a key component in ensuring drainage safety, placing higher demands on food processor design.

[0003] Currently, existing kitchen waste management systems not only process food waste but also filter and treat the wastewater produced. Large-scale integrated kitchen waste management systems, in particular, require large volumes of food waste to be processed. Directly discharging wastewater into the sewer can easily carry solid impurities and oil with them, potentially clogging the sewer. Furthermore, some regions require pre-treatment of wastewater to minimize environmental impacts.

[0004] To address this issue, existing kitchen appliances are equipped with a filtration unit that separates solid impurities, oil, and other impurities from wastewater, thereby purifying the wastewater. The filtration unit in existing kitchen appliances primarily consists of a housing and a filter element, which is installed within the housing. As the wastewater passes through the filtration unit, the filter element filters the wastewater. However, due to the fixed structure of the filtration unit—that is, the fixed structure of the housing and filter element—the filtration efficiency of the filtration unit is fixed, making it difficult for kitchen appliances to adapt to different wastewater treatment requirements. Summary of the Invention

[0005] The present application provides a multi-stage filtration kitchen appliance, the purpose of which is to improve the structure of the filtration unit so that the filtration efficiency of the filtration unit can be adjusted according to actual requirements, thereby enabling the kitchen appliance to adapt to different sewage treatment requirements.

[0006] The present application provides a multi-stage filtering kitchen appliance adopting the following technical solution:

[0007] A multi-stage filtration kitchen appliance, comprising a water inlet pipe, a water outlet pipe and a plurality of filter units, wherein the water inlet pipe, the plurality of filter units and the water outlet pipe are connected in sequence; the filter unit comprises a cylindrical shell and a filter core, the cylindrical shell is connected with a sewage pipe and a clean water pipe, the filter core is located in the cylindrical shell, the clean water pipe is detachably connected to the filter core, and the filter core is connected to the clean water pipe; the sewage pipe is connected to the clean water pipe of another adjacent filter unit, the water inlet pipe is connected to the sewage pipe of the adjacent filter unit, and the water outlet pipe is connected to the clean water pipe of the adjacent filter unit; the cylindrical shell comprises a top pipe, an intermediate extension pipe and a bottom pipe, the water inlet pipe and the sewage pipe are both connected to the top pipe, the top pipe, the intermediate extension pipe and the bottom pipe are coaxially detachably connected in sequence, and the intermediate extension pipe can adjust its own length along its own axial direction.

[0008] By adopting the above technical solution, the water inlet pipe, several filter units and the water outlet pipe are connected in sequence, so the multi-stage filter units are connected in series, so that the kitchen appliance has efficient sewage treatment capabilities.

[0009] The filter unit is arranged in coordination with the sewage pipe, the cartridge, the filter element and the clean water pipe, so that several filter units can be connected in sequence, and the filter element in the filter unit can realize the sewage treatment function, which meets the requirements of a single filter unit.

[0010] Because the shell includes a top tube, an intermediate extension tube, and a bottom tube, and the intermediate extension tube is axially adjustable, the length of the shell can be freely adjusted. Because the filter element is detachably connected to the water purification pipe, and the top tube, intermediate extension tube, and bottom tube are detachably connected in sequence, it is convenient to replace different filter elements.

[0011] With the adjustable shell length and replaceable filter element, the shell length can be adjusted according to actual requirements, and the filter element can be replaced with a corresponding length. This allows the total length of the filter unit to be adjusted according to actual sewage treatment needs, thereby changing the effective filtration area and residence time of the filter element. This can adjust the filtration efficiency of the filter unit and make the kitchen appliance adaptable to different sewage treatment requirements.

[0012] Optionally, several of the filtration units include a coarse filtration unit, a fine filtration unit, an oil removal unit and an adsorption unit, and the water inlet pipe, coarse filtration unit, fine filtration unit, oil removal unit, adsorption unit and water outlet pipe are connected in sequence; the coarse filtration unit is used to filter large particles of solid impurities in the sewage; the fine filtration unit is used to filter small particles of solid impurities in the sewage; the oil removal unit is used to filter grease in the sewage; and the adsorption unit is used to adsorb impurities in the sewage.

[0013] By adopting the above technical solution, since the multiple filtering units include a coarse filtration unit, a fine filtration unit, an oil removal unit and an adsorption unit, and the coarse filtration unit, the fine filtration unit, the oil removal unit and the adsorption unit have different filtering effects on sewage, this allows the kitchen appliance to perform multi-stage filtration on sewage. The multiple filtering units can perform coarse filtration, fine filtration, oil removal and adsorption on the sewage in sequence, which can ensure the purification effect of the sewage.

[0014] Optionally, the intermediate extension tube includes a plurality of intermediate rings, and the plurality of intermediate rings are coaxially arranged in sequence, and the top tube, the plurality of intermediate rings and the bottom tube are coaxially detachably connected in sequence.

[0015] By adopting the above technical solution, the intermediate extension tube includes several intermediate rings, which are coaxially detachably connected. This allows the length of the intermediate extension tube to be quickly adjusted by increasing or decreasing the number of intermediate rings, thereby meeting the function of the intermediate extension tube.

[0016] Optionally, the filter element includes a cap, a filter tube and a bottom plate, the filter tube is coaxially arranged with the cartridge shell, and the cap, filter tube and bottom plate are coaxially and detachably connected in sequence; a clean water space is formed between the cap, filter tube and bottom plate, the cap is detachably connected to the clean water tube, and the clean water tube is connected to the clean water space; a sewage space is formed between the outer wall of the filter tube and the inner wall of the cartridge shell, and the sewage pipe is connected to the sewage space; a plurality of water permeable holes are opened on the outer wall of the filter tube, and the water permeable holes connect the clean water space and the sewage space; a first filter layer is provided on the outside of the filter tube, and the first filter layer covers all the water permeable holes.

[0017] By adopting the above technical solution, the filter element forms a clean water space and a sewage space within the shell through the coordinated arrangement of the cap, filter tube, bottom plate, and first filter layer. Furthermore, the sewage pipe, sewage space, permeable hole, clean water space, and clean water pipe are sequentially connected, thereby ensuring stable flow of sewage within the shell. Furthermore, because the first filter layer is located between the clean water space and the sewage space, sewage flows from the sewage space into the clean water space through the first filter layer, thus satisfying the function of the filter element. Furthermore, the detachable connection between the cap and the clean water pipe facilitates replacement of the filter element.

[0018] Optionally, a plurality of first sliding rods are provided on the bottom plate, and the length direction of the first sliding rods is arranged along the axial direction of the filter tube; a plurality of first sliding holes are opened on the side of the filter tube facing the bottom plate, and the plurality of first sliding holes are arranged in sequence along the circumference of the filter tube; the first sliding holes are arranged in a one-to-one correspondence with the first sliding rods, one end of the first sliding rod is connected to the bottom plate, and the other end is plugged into the corresponding first sliding hole, and the first sliding rod is slidably connected to the inner side wall of the corresponding first sliding hole.

[0019] By adopting the above technical solution, the first sliding rod and the first sliding hole are slidably matched, and the bottom plate is detachably connected to the filter tube, which makes it possible to adjust the position of the bottom plate by sliding along the axial direction of the filter tube, thereby making the length of the filter element adjustable, so that the length of the filter element can adapt to different lengths of the barrel shell, thereby improving the applicability of the filter element.

[0020] Moreover, since the length of the filter element is adjustable, a first filter layer of corresponding length can be installed on the outside of the filter tube. This eliminates the need to directly replace the entire filter element, only the first filter layer needs to be replaced, which can reduce the cost of replacing the filter element.

[0021] Optionally, a plurality of first elastic rings are provided at the lower end of the filter tube, and the first elastic rings are provided in one-to-one correspondence with the first sliding rods. The first elastic rings are sleeved on the outer sides of the corresponding first sliding rods, and the first elastic rings are provided on the inner side walls of the corresponding first sliding holes.

[0022] By adopting the above technical solution, the first elastic ring is set. Since the first elastic ring is located in the first ring hole and the first elastic ring is sleeved on the outside of the first slide rod, the first elastic ring can clamp the first slide rod, thereby increasing the damping of the sliding of the first slide rod. This makes it possible for the bottom plate to be stably fixed in the corresponding position after adjusting the position of the bottom plate, thereby improving the stability of the filter element structure.

[0023] Optionally, a top plate is provided in the filter tube, the top plate is connected to the filter tube, and the top plate is spaced apart from the bottom plate along the axial direction of the filter tube; a sliding tube and a sliding column are provided between the top plate and the bottom plate, the sliding tube is located in the filter tube, and the sliding tube and the filter tube are coaxially arranged, one end of the sliding tube is connected to the top plate, and the other end is sleeved on the outside of the sliding column, one end of the sliding column is connected to the bottom plate, and the sliding tube is slidably connected to the sliding column along its own axial direction; a locking piece is provided on the sliding tube, and the locking piece is used to lock the sliding tube and the sliding column.

[0024] By adopting the above technical solution, the top plate, sliding tube, and sliding post are arranged in coordination within the filter tube. The top plate is connected to the filter tube, and the sliding tube and sliding post are plugged together and can slide relative to each other. This further improves the stability of the bottom plate's movement. Furthermore, a locking member is provided between the sliding tube and the sliding post to lock the sliding tube and the sliding post. This allows the locking member to secure the sliding tube and the sliding post after the bottom plate position is adjusted. This further improves the stability of the bottom plate's fixation and ensures the stability of the filter element's overall structure.

[0025] Optionally, the filter tube includes a first tube rack and a second tube rack, the first tube rack is sleeved on the outside of the second tube rack, the water permeable holes penetrate the first tube rack and the second tube rack at the same time, and an interlayer space is formed between the inner wall of the first tube rack and the outer wall of the second tube rack; the first tube rack and the second tube rack are both located between the cap and the bottom plate along their own axis, the first tube rack and the second tube rack are both detachably connected to the bottom plate, and the first tube rack and the second tube rack are both detachably connected to the cap; the filter element also includes a filling layer and a second filter layer, the first filter layer is sleeved on the outside of the first tube rack, the filling layer is inserted in the interlayer space, and the second filter layer is inserted in the second tube rack, and the first filter layer, the second filter layer and the filling layer all cover all the water permeable holes.

[0026] By adopting the above technical solution, the filter tube is provided with a first filter layer on the outside of the filter tube and a second filter layer on the inside of the filter tube through the arrangement of the first tube rack and the second tube rack, and a filling layer is provided between the first filter layer and the second filter layer. This allows the sewage to pass through the first filter layer, the filling layer and the second filter layer in sequence when flowing from the sewage space into the clean water space, thereby enabling the sewage to be treated three times, thereby improving the sewage treatment effect.

[0027] Optionally, a pressure gauge is provided on the top pipe.

[0028] By adopting the above technical solution, the setting of the pressure gauge provides a real-time monitoring function, and the working status of the filter unit can be judged by detecting the pressure change in the top pipe.

[0029] Optionally, an ultraviolet lamp is provided in the cylindrical shell.

[0030] By adopting the above technical solution and setting the ultraviolet lamp, the filter element can be sterilized and disinfected.

[0031] In summary, this application includes at least one of the following beneficial technical effects:

[0032] 1. The structural setting of the filter unit of the present application enables the filter unit to adjust the shell length according to actual requirements and replace the filter element of the corresponding length, which can change the total length of the filter unit, thereby changing the effective filtration area and residence time of the filter element, thereby adjusting the filtration efficiency of the filter unit, so that the kitchen appliance can adapt to different sewage treatment requirements.

[0033] 2. This application uses multi-stage filtration units connected in series to enable the kitchen appliance to have efficient sewage treatment capabilities.

[0034] 3. The present application adopts the structural setting of the filter element so that the sewage will pass through the first filter layer, the filling layer and the second filter layer in the filter unit in sequence, which can treat the sewage three times and thus improve the sewage treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the overall structure of a multi-stage filtering kitchen appliance of the present application.

[0036] Figure 2 It is a schematic diagram of the overall structure of the filter unit of the present application.

[0037] Figure 3 It is a schematic cross-sectional structural diagram of the filter unit of the present application.

[0038] Figure 4 It is a schematic cross-sectional view of the connecting cap and the top pipe of the present application.

[0039] Figure 5 It is a schematic cross-sectional view of the bottom tube and the middle ring of the present application.

[0040] Figure 6 It is a schematic diagram of the overall structure of the filter element of this application.

[0041] Figure 7 It is a schematic diagram of the overall structure of the cap, filter tube and bottom plate of the present application.

[0042] Figure 8 It is a schematic cross-sectional view of the filter element of the present application.

[0043] Figure 9 yes Figure 7 Schematic diagram of the locally enlarged structure of part A.

[0044] Figure 10 It is a schematic diagram of the overall structure of the cap, base plate and sliding locking assembly of the present application.

[0045] Figure 11 It is a schematic cross-sectional structural diagram of the locking member of the present application.

[0046] In the figure, 1. mounting frame; 11. mounting hole; 2. water inlet pipe; 3. water outlet pipe; 4. filter unit; 401. coarse filter unit; 402. fine filter unit; 403. oil removal unit; 404. adsorption unit; 41. connecting cap; 411. sewage pipe; 412. clean water pipe; 413. pressure gauge; 42. shell; 421. top pipe; 422. middle extension pipe; 4221. middle ring; 423. bottom pipe; 424. UV lamp; 4241. first lamp; 4242. middle lamp; 4243. second lamp; 43. filter element; 431. cap; 4311. clean water tank; 4312. connecting pipe; 432. filter pipe; 4321. water hole; 4322. first pipe rack; 4323. second pipe rack; 433. bottom plate; 434 , first filter layer; 435, second filter layer; 436, filling layer; 437, top plate; 4371, through hole; 44, clean water space; 45, sewage space; 46, sliding locking assembly; 461, sliding tube; 4611, mounting tube; 4612, extension tube; 462, sliding column; 4621, give way groove; 4622, locking plate; 463, locking piece; 4631, locking tube; 4632, locking groove; 4633, locking block; 4634, compression spring; 47, length adjustment assembly; 471, first sliding piece; 4711, first sliding rod; 4712, first sliding hole; 472, second sliding piece; 4721, second sliding rod; 4722, second sliding hole; 48, clamping assembly; 481, first elastic ring; 482, second elastic ring. DETAILED DESCRIPTION

[0047] The following is combined with Figure 1 -Attached Figure 11 , further details of this application are given.

[0048] A multi-stage filtering kitchen machine, referring to Figure 1 and Figure 2 , including a mounting frame 1, a water inlet pipe 2, a water outlet pipe 3, and a plurality of filter units 4. The plurality of filter units 4 are sequentially mounted on the mounting frame 1, and the water inlet pipe 2, the plurality of filter units 4 and the water outlet pipe 3 are sequentially connected.

[0049] When the kitchen appliance treats sewage, the sewage will pass through all the filter units 4 in sequence, thereby performing multi-stage filtration treatment on the sewage, which can effectively improve the treatment effect of the sewage.

[0050] Reference Figure 2 and Figure 3 The filter unit 4 includes a connecting cap 41, a cylindrical shell 42 and a filter element 43. The cylindrical shell 42 is vertically arranged, the connecting cap 41 is installed on the upper end of the cylindrical shell 42, the filter element 43 is located in the cylindrical shell 42, and the filter element 43 is coaxially arranged with the cylindrical shell 42.

[0051] Reference Figure 3 and Figure 4 The connecting cap 41 is detachably connected to the upper end of the cylindrical shell 42. A sewage pipe 411 and a clean water pipe 412 are provided on the sidewall of the connecting cap 41. The sewage pipe 411 is connected to the cylindrical shell 42. One end of the clean water pipe 412 is inserted into the cylindrical shell 42. The filter element 43 is coaxially detachably connected to the clean water pipe 412 and is in communication with the clean water pipe 412. In this embodiment, the connecting cap 41 and the cylindrical shell 42 are connected by threads; the filter element 43 and the clean water pipe 412 are also connected by threads. This facilitates the assembly and disassembly of the cylindrical shell 42 and the replacement of the filter element 43.

[0052] In this embodiment, refer to Figure 1 and Figure 4 The sewage pipe 411 of the first filter unit 4 is connected to the water inlet pipe 2, and the clean water pipe 412 of the last filter unit 4 is connected to the water outlet pipe 3. A water pipe is provided between two adjacent filter units 4. One end of the water pipe is connected to the sewage pipe 411 on the filter unit 4, and the other end is connected to the clean water pipe 412 on the other adjacent filter unit 4.

[0053] The structural design of the filter unit 4 allows sewage to enter the cylindrical shell 42 through the sewage pipe 411. Then, under the action of the filter element 43, the sewage is filtered by the filter element 43 and enters the interior of the filter element 43. The water entering the interior of the filter element 43 is discharged through the clean water pipe 412. On this basis, the setting of the water pipe allows the sewage discharged from the clean water pipe 412 to enter the next adjacent filter unit 4, which can meet the requirements of continuous sewage filtration.

[0054] Reference Figure 1 and Figure 3 The plurality of filter units 4 include a coarse filter unit 401, a fine filter unit 402, an oil removal unit 403, and an adsorption unit 404. The coarse filter unit 401, the fine filter unit 402, the oil removal unit 403, and the adsorption unit 404 are sequentially connected, with the water inlet pipe 2 connected to the coarse filter unit 401, and the water outlet pipe 3 connected to the adsorption unit 404. The coarse filter unit 401, the fine filter unit 402, the oil removal unit 403, and the adsorption unit 404 are four types of filter units 4 with the same structure but different functions. The difference between the four filter units 4 lies in the different materials of the filter element 43, which enables different purification treatments for the sewage.

[0055] Under the cooperation of the four filtering units 4, the kitchen appliance can perform multi-stage filtering treatment on the sewage, and can perform coarse filtration, fine filtration, oil removal and adsorption on the sewage, which can ensure the purification effect of the sewage.

[0056] In this embodiment, refer to Figure 1 and Figure 2A plurality of mounting holes 11 are provided on the mounting frame 1. The mounting holes 11 are arranged in one-to-one correspondence with the cylindrical shells 42. The mounting holes 11 and the corresponding cylindrical shells 42 are coaxially arranged. The mounting frame 1 is located between the connecting cap 41 and the corresponding cylindrical shell 42, and the connecting cap 41 and the corresponding cylindrical shell 42 both contact the mounting frame 1.

[0057] When the connection cap 41 is mounted on the corresponding cartridge shell 42 , the connection cap 41 and the corresponding cartridge shell 42 clamp the mounting frame 1 , which enables the filter unit 4 to be mounted on the mounting frame 1 in this manner.

[0058] Reference Figure 1 and Figure 4 A pressure gauge 413 is provided on the connecting cap 41, and the pressure gauge 413 is installed on the sewage pipe 411. With the cooperation of several pressure gauges 413, the water inlet pressure and water outlet pressure of several filter units 4 can be detected in real time, thereby monitoring the operation of the filter unit 4.

[0059] Reference Figure 2 and Figure 3 The cylindrical shell 42 includes a top pipe 421, an intermediate extension pipe 422, and a bottom pipe 423. The top pipe 421, the intermediate extension pipe 422, and the bottom pipe 423 are coaxially arranged from top to bottom. The connecting cap 41 is detachably connected to the upper end of the top pipe 421. The sewage pipe 411 and the clean water pipe 412 are both connected to the top pipe 421. The intermediate extension pipe 422 includes a plurality of intermediate rings 4221, which are arranged in sequence along its own axis and are located between the top pipe 421 and the bottom pipe 423 along its own axis. The top pipe 421 and the adjacent intermediate ring 4221, the adjacent intermediate rings 4221, and the bottom pipe 423 and the adjacent intermediate ring 4221 are all connected by threads.

[0060] By increasing or decreasing the number of intermediate rings 4221, the length of the intermediate extension tube 422 can be changed, and then the length of the cylindrical shell 42 can be changed. Therefore, the actual length of the cylindrical shell 42 can be adjusted according to the actual installation space requirements, so that the filter unit 4 of the present application can adjust the length according to the space requirements in the kitchen appliance, thereby reducing space waste and increasing sewage treatment efficiency.

[0061] In this embodiment, refer to Figure 3 A plurality of ultraviolet lamps 424 are provided in the shell 42. The ultraviolet lamps 424 are provided on the inner wall of the shell 42 and are spaced apart along the circumference of the shell 42. The provision of the ultraviolet lamps 424 can sterilize the filter element 43 in the shell 42 and prevent the growth of germs.

[0062] Reference Figure 4 and Figure 5The ultraviolet lamp tube 424 includes a first lamp tube 4241, a second lamp tube 4243 and several intermediate lamp tubes 4242. The first lamp tube 4241 is arranged on the inner wall of the top tube 421, the second lamp tube 4243 is arranged on the inner wall of the bottom tube 423, and the intermediate lamp tubes 4242 are arranged in a one-to-one correspondence with the intermediate ring 4221. The intermediate lamp tubes 4242 are arranged on the inner walls of the corresponding intermediate rings 4221.

[0063] The structural arrangement of the ultraviolet lamp 424 ensures that after the length of the cylindrical shell 42 is changed, the ultraviolet rays emitted by the ultraviolet lamp 424 can cover the entire filter element 43.

[0064] Reference Figure 6 and Figure 7 The filter element 43 includes a cap 431, a filter tube 432 and a bottom plate 433. The filter tube 432 is coaxially arranged with the cylindrical shell 42. The filter tube 432 is located between the cap 431 and the bottom plate 433 along its own axial direction. The upper end of the filter tube 432 is connected to the cap 431, and the lower end is connected to the bottom plate 433. A plurality of water-permeable holes 4321 are opened on the outer wall of the filter tube 432.

[0065] Reference Figure 4 and Figure 8 A clean water space 44 is formed between the filter tube 432, the cap 431, and the bottom plate 433. The cap 431 is detachably connected to the clean water tube 412, and the clean water tube 412 is in communication with the clean water space 44. A sewage space 45 is formed between the outer wall of the filter tube 432 and the inner wall of the cylindrical shell 42, and the sewage pipe 411 is in communication with the sewage space 45. Furthermore, a water permeable hole 4321 connects the sewage space 45 with the clean water space 44.

[0066] The structural design of the filter element 43 forms a clean water space 44 and a sewage space 45 inside and outside the filter element 43, and the sewage pipe 411, the sewage space 45, the water permeable hole 4321, the clean water space 44 and the clean water pipe 412 are connected in sequence, which allows the sewage in the filter unit 4 to flow in the required direction.

[0067] In this embodiment, refer to Figure 4 and Figure 8 The end of the cap 431 facing the filter tube 432 is provided with a clean water groove 4311, which is in communication with the clean water space 44. The end of the cap 431 facing away from the filter tube 432 is coaxially connected to a connecting pipe 4312, which is in communication with the clean water groove 4311 and is sleeved outside the clean water tube 412. The connecting pipe 4312 is threadedly connected to the corresponding clean water tube 412.

[0068] The setting of the connecting pipe 4312 on the cap 431 realizes the detachable connection between the cap 431 and the clean water pipe 412, and then realizes the detachable connection between the filter element 43 and the clean water pipe 412, and the cooperation between the connecting pipe 4312 and the clean water tank 4311 realizes the communication between the clean water pipe 412 and the clean water space 44.

[0069] Reference Figure 7 and Figure 8 The filter tube 432 includes a first tube frame 4322 and a second tube frame 4323. The first tube frame 4322 and the second tube frame 4323 are coaxially arranged and sleeved on the outside of the second tube frame 4323. The water permeable hole 4321 passes through both the first tube frame 4322 and the second tube frame 4323. The inner wall of the first tube frame 4322 is spaced apart from the outer wall of the second tube frame 4323, forming an interlayer space between the first tube frame 4322 and the second tube frame 4323. The first tube frame 4322 and the second tube frame 4323 are both located between the cap 431 and the base plate 433. The upper ends of the first tube frame 4322 and the upper ends of the second tube frame 4323 are both detachably connected to the cap 431, and the lower ends of the first tube frame 4322 and the lower ends of the second tube frame 4323 are both detachably connected to the base plate 433.

[0070] Reference Figure 7 and Figure 8 The filter element 43 also includes a first filter layer 434, a second filter layer 435 and a filling layer 436. The first filter layer 434 is sleeved on the outside of the first pipe rack 4322, the second filter layer 435 is inserted in the second pipe rack 4323, and the second pipe rack 4323 is sleeved on the outside of the second filter layer 435. The filling layer 436 is filled in the interlayer space between the first pipe rack 4322 and the second pipe rack 4323.

[0071] The filter tube 432, the first filter layer 434, the second filter layer 435 and the filling layer 436 are arranged in coordination. When the sewage enters the clean water space 44 from the sewage space 45, the sewage will pass through the first filter layer 434, the filling layer 436 and the second filter layer 435 in sequence, which can filter the sewage three times, thereby improving the sewage treatment effect of the corresponding filter unit 4.

[0072] In this embodiment, refer to Figure 1 and Figure 8 In the coarse filter unit 401, the first filter layer 434 and the second filter layer 435 are both made of stainless steel mesh plates, and the filling layer 436 is made of coarse sand or metal wire mesh. The pore size of the stainless steel mesh plates is between 1 mm and 8 mm, preferably 5 mm.

[0073] In the fine filtration unit 402, the first filter layer 434 and the second filter layer 435 are made of polypropylene, and the filling layer 436 is made of polypropylene fiber and ultrafine powder (diatomaceous earth). The pore size of the polypropylene filter layer is 1 micron to 10 microns.

[0074] In oil removal unit 403, first filter layer 434 and second filter layer 435 are made of an oil-resistant polymer material, and filling layer 436 is made of lipophilic polymer spheres. The oil-resistant polymer material is made of polyvinylidene fluoride, polytetrafluoroethylene, polychlorotrifluoroethylene, or other oil-resistant materials; the lipophilic polymer spheres are made of polystyrene, polylauryl methacrylate, silicone-modified polyurethane, or other lipophilic materials.

[0075] In the adsorption unit 404 , the first filter layer 434 and the second filter layer 435 are made of stainless steel mesh plates, and the filling layer 436 is made of coconut shell activated carbon granules.

[0076] The first filter layer 434 , the second filter layer 435 and the filling layer 436 in the coarse filter unit 401 , the fine filter unit 402 , the oil removal unit 403 and the adsorption unit 404 are all made of corresponding materials, which can meet different sewage treatment requirements and ensure the sewage treatment effect.

[0077] Reference Figure 8 A top plate 437 is disposed between cap 431 and filter tube 432. Cap 431 is sleeved on the outside of top plate 437 and is detachably connected to top plate 437. Both first and second pipe racks 4322 and 4323 are detachably connected to top plate 437. The underside of top plate 437 and the upper side of bottom plate 433 contact first filter layer 434, second filter layer 435, and packing layer 436. A plurality of through holes 4371 are formed in top plate 437, connecting clean water space 44 and clean water tank 4311.

[0078] In this embodiment, the cap 431 is connected to the top plate 437 by threads; the top plate 437 is connected to the first pipe rack 4322 and the second pipe rack 4323 by bolts.

[0079] The structural arrangement of top plate 437 enables a detachable connection between cap 431 and filter tube 432. Furthermore, because top plate 437 is detachably connected to first pipe rack 4322 and second pipe rack 4323, first filter layer 434, second filter layer 435, and filling layer 436 are positioned between top plate 437 and bottom plate 433. This facilitates installation of first filter layer 434, second filter layer 435, and filling layer 436 into filter tube 432 when top plate 437 is not installed. After top plate 437 is installed, top plate 437 and bottom plate 433 secure first filter layer 434, second filter layer 435, and filling layer 436. Therefore, this structural arrangement facilitates assembly and disassembly of first filter layer 434, second filter layer 435, and filling layer 436.

[0080] Reference Figure 7 and Figure 9A length adjustment component 47 is provided between the bottom plate 433 and the filter tube 432 . The length adjustment component 47 includes a first sliding member 471 and a second sliding member 472 .

[0081] Reference Figure 7 and Figure 9 The first sliding member 471 includes a plurality of first sliding rods 4711, which are arranged in sequence along the circumference of the first pipe rack 4322. A plurality of first sliding holes 4712 are formed on the side of the first pipe rack 4322 facing the bottom plate 433. The first sliding holes 4712 are axially arranged along the axial direction of the first pipe rack 4322. The first sliding rods 4711 and the first sliding holes 4712 are arranged in a one-to-one correspondence. One end of the first sliding rod 4711 is connected to the bottom plate 433, and the other end is plugged into the corresponding first sliding hole 4712. The first sliding rod 4711 is slidably connected to the inner wall of the corresponding first sliding hole 4712 along its own axial direction.

[0082] Reference Figure 7 and Figure 9 The second sliding member 472 includes a plurality of second sliding rods 4721, which are arranged in sequence along the circumference of the second pipe rack 4323. A plurality of second sliding holes 4722 are opened on the side of the second pipe rack 4323 facing the bottom plate 433. The second sliding holes 4722 are axially arranged along the axial direction of the second pipe rack 4323. The second sliding rods 4721 and the second sliding holes 4722 are arranged in a one-to-one correspondence. One end of the second sliding rod 4721 is connected to the bottom plate 433, and the other end is plugged into the corresponding second sliding hole 4722. The second sliding rod 4721 is slidably connected to the inner wall of the corresponding second sliding hole 4722 along its own axial direction.

[0083] Under the cooperation of the first sliding member 471 and the second sliding member 472, the bottom plate 433 can slide stably, which can improve the stability of the movement of the bottom plate 433. In addition, the cooperation of the plurality of first sliding rods 4711 and the plurality of second sliding rods 4721 can extend the filling space, thereby supporting the filling layer 436.

[0084] Reference Figure 7 and Figure 9 A clamping assembly 48 is provided on the side of the filter tube 432 facing the bottom plate 433. The clamping assembly 48 includes a plurality of first elastic rings 481 and a plurality of second elastic rings 482. The first elastic rings 481 are arranged in a one-to-one correspondence with the first sliding rod 4711. The first elastic ring 481 is arranged on the inner side wall of the corresponding first sliding hole 4712, and the first elastic ring 481 is sleeved on the outer side wall of the corresponding first sliding rod 4711; the second elastic ring 482 is arranged in a one-to-one correspondence with the second sliding rod 4721. The second elastic ring 482 is arranged on the inner side wall of the corresponding second sliding hole 4722, and the second elastic ring 482 is sleeved on the outer side wall of the corresponding second sliding rod 4721.

[0085] Through the cooperation of the first elastic ring 481 and the second elastic ring 482, the friction between the first slide bar 4711 and the first pipe rack 4322 can be increased, and the friction between the second slide bar 4721 and the second pipe rack 4323 can be increased, which can further improve the stability of the movement of the bottom plate 433 and at the same time make the distance between the bottom plate 433 and the top plate 437 adjustable.

[0086] Reference Figure 8 and Figure 10 A sliding locking assembly 46 is provided between the top plate 437 and the bottom plate 433. The sliding locking assembly 46 includes a sliding tube 461 and a sliding column 462. The sliding tube 461 is located in the second filter layer 435. The sliding tube 461 is coaxially arranged with the second pipe rack 4323. The sliding column 462 is coaxially arranged with the sliding tube 461. The upper end of the sliding tube 461 is coaxially connected to the top plate 437, and the lower end of the sliding column 462 is coaxially connected to the bottom plate 433. The lower end of the sliding tube 461 is coaxially plugged with the upper end of the sliding column 462, and the sliding column 462 is slidably connected to the sliding tube 461 along its own axial direction.

[0087] The sliding locking assembly 46 is arranged in conjunction with the sliding column 462 and the sliding tube 461, so that the top plate 437 and the bottom plate 433 can move toward or away from each other, which can change the distance between the top plate 437 and the bottom plate 433, so that the first filter layer 434, the second filter layer 435 and the filling layer 436 of different lengths can be installed, the length of the filter element 43 can be changed, and the filtration efficiency of the filter unit 4 can be changed.

[0088] In this embodiment, refer to Figure 10 The sliding tube 461 includes a mounting tube 4611, which is located in the second filter layer 435 and is coaxially arranged with the second pipe rack 4323. The upper end of the mounting tube 4611 is detachably connected to the top plate 437, and the lower end of the mounting tube 4611 is coaxially connected to an extension tube 4612, which is detachably connected to the mounting tube 4611. There are multiple extension tubes 4612, which are coaxially arranged in sequence along their own axes, and two adjacent extension tubes 4612 are detachably connected. The inner side walls of the mounting tube 4611 and the extension tubes 4612 are all flush, and the mounting tube 4611 and the extension tubes 4612 are all plugged into and matched with the sliding column 462, and the mounting tube 4611 and the extension tubes 4612 are all slidably connected to the inner side walls of the sliding column 462 along their own axes.

[0089] The sliding tube 461 is arranged in cooperation with the mounting tube 4611 and the extension tube 4612 . The length of the sliding tube 461 can be changed by increasing or decreasing the number of the extension tubes 4612 , which can further increase the maximum distance between the top plate 437 and the bottom plate 433 .

[0090] Reference Figure 10 and Figure 11 A locking piece 463 is also provided on the locking tube 4631, and the locking piece 463 includes a locking tube 4631. The locking tube 4631 and the mounting tube 4611 are coaxially spaced apart, and the extension tube 4612 is located between the locking tube 4631 and the mounting tube 4611 along its own axial direction. The locking tube 4631 is coaxially detachably connected to the corresponding extension tube 4612, and the inner wall of the locking tube 4631 is flush with the inner wall of the extension tube 4612.

[0091] Reference Figure 10 and Figure 11 The inner sidewall of the locking tube 4631 is formed with a plurality of locking grooves 4632, which are spaced apart circumferentially along the locking tube 4631 and arranged radially along the depth direction of the locking tube 4631. The locking member 463 also includes a plurality of locking blocks 4633, which are arranged one-to-one with the locking grooves 4632. The locking blocks 4633 engage with the corresponding locking grooves 4632 and slide along the inner sidewalls of the locking grooves 4632 in the depth direction of the locking grooves 4632. A plurality of compression springs 4634 are disposed between the locking blocks 4633 and the bottoms of the corresponding locking grooves 4632. One end of the compression spring 4634 is connected to the locking block 4633, and the other end is connected to the bottom of the locking groove 4632. The side of the locking block 4633 facing away from the compression spring 4634 contacts the sidewall of the sliding post 462.

[0092] The locking piece 463 is arranged by the cooperation of the locking block 4633 and the compression spring 4634. Under the action of the compression spring 4634, the locking block 4633 presses against the sliding column 462. With the cooperation of several locking blocks 4633, the sliding column 462 can be clamped, which fixes the sliding column 462 to the sliding tube 461.

[0093] Reference Figure 10 and Figure 11 The sliding post 462 is rotatably connected to the base plate 433. The outer wall of the sliding post 462 is provided with a plurality of relief grooves 4621. These relief grooves 4621 are sequentially spaced along the circumference of the sliding post 462 and extend axially through the sliding post 462. The relief grooves 4621 correspond to the locking grooves 4632 in a one-to-one manner. When the sliding post 462 rotates until a relief groove 4621 is aligned with the corresponding locking groove 4632, all relief grooves 4621 are connected to the corresponding locking groove 4632. At this time, the locking block 4633 is inserted into the corresponding relief groove 4621.

[0094] When the sliding post 462 is rotated and all the locking blocks 4633 are inserted into the corresponding clearance grooves 4621, the resistance of the locking blocks 4633 on the sliding post 462 is reduced, allowing the sliding post 462 to slide relative to the locking tube 4631, thereby adjusting the length of the filter element 43. After the adjustment is completed, the sliding post 462 is rotated again so that the inner sidewalls of the clearance grooves 4621 contact the corresponding locking blocks 4633, causing the locking blocks 4633 to contact the outer sidewalls of the sliding post 462 again, thereby re-securing the sliding post 462 and the locking tube 4631.

[0095] In this embodiment, refer to Figure 11 The locking block 4633 is provided with an arcuate surface on the side facing the sliding column 462 , the cross section of the give way groove 4621 is arcuate, and after the sliding column 462 is inserted into the corresponding give way groove 4621 , the arcuate surface fits against the inner wall of the give way groove 4621 .

[0096] The structural arrangement of the arcuate surface on the locking block 4633 and the paving groove 4621 ensures that when the sliding post 462 rotates, the locking block 4633 inserted into the paving groove 4621 can contact the outer side surface of the sliding post 462 again.

[0097] In this embodiment, refer to Figure 7 and Figure 10 A locking plate 4622 is rotatably provided on one side of the bottom plate 433 away from the top plate 437 , and the locking plate 4622 is connected to the sliding column 462 .

[0098] The operating principle of the embodiment of the present application is as follows: When the kitchen appliance needs to process wastewater containing a large amount of solid debris and floating fat, the wastewater flows into the water inlet pipe 2 and passes through the coarse filtration unit 401, the fine filtration unit 402, the oil removal unit 403, and the adsorption unit 404 in sequence, before being discharged from the water outlet pipe 3. As the wastewater passes through the coarse filtration unit 401, it removes most of the large solid impurities in the wastewater; as the wastewater passes through the fine filtration unit 402, it removes smaller solid impurities in the wastewater; as the wastewater passes through the oil removal unit 403, it absorbs the oil in the wastewater, or, through a selective separation mechanism with specific chemical properties, reduces the liquid surface tension and promotes the rapid aggregation and precipitation of the oil; and as the wastewater passes through the adsorption unit 404, it absorbs the trace pollutants remaining in the wastewater.

[0099] When the filtration efficiency of filter unit 4 does not meet the corresponding requirements, the shell 42 and filter element 43 are modified. Specifically, several intermediate rings 4221 are added to the shell 42 to increase the volume of the shell 42, allowing it to accommodate more sewage. The length of the filter element 43 is adjusted, and the first filter layer 434, second filter layer 435, and filling layer 436 of corresponding sizes are replaced. This can change the filtration area of ​​the filter element 43. Therefore, after the filter element 43 and the shell 42 are adjusted accordingly, the filter element 43 is installed in the shell 42, which can change the filtration efficiency of the filter unit 4.

[0100] The examples of this specific embodiment are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.

Claims

1. A multi-stage filtering kitchen appliance, characterized in that: It comprises a water inlet pipe (2), a water outlet pipe (3) and a plurality of filter units (4), wherein the water inlet pipe (2), the plurality of filter units (4) and the water outlet pipe (3) are connected in sequence; The filter unit (4) comprises a cylindrical shell (42) and a filter element (43); the cylindrical shell (42) is connected to a sewage pipe (411) and a clean water pipe (412); the filter element (43) is located in the cylindrical shell (42); the clean water pipe (412) and the filter element (43) are detachably connected, and the filter element (43) is connected to the clean water pipe (412); The sewage pipe (411) is in communication with the clean water pipe (412) of another adjacent filter unit (4), the water inlet pipe (2) is in communication with the sewage pipe (411) of the adjacent filter unit (4), and the water outlet pipe (3) is in communication with the clean water pipe (412) of the adjacent filter unit (4); The cylindrical shell (42) includes a top pipe (421), an intermediate extension pipe (422), and a bottom pipe (423); the water inlet pipe (2) and the sewage pipe (411) are both connected to the top pipe (421); the top pipe (421), the intermediate extension pipe (422), and the bottom pipe (423) are coaxially detachably connected in sequence; and the intermediate extension pipe (422) can adjust its own length along its own axial direction; The filter element (43) comprises a cap (431), a filter tube (432), and a bottom plate (433); the filter tube (432) and the cylindrical shell (42) are coaxially arranged; the cap (431), the filter tube (432), and the bottom plate (433) are coaxially detachably connected in sequence; A clean water space (44) is formed between the cap (431), the filter tube (432) and the bottom plate (433); the cap (431) is detachably connected to the clean water tube (412); and the clean water tube (412) is in communication with the clean water space (44); A sewage space (45) is formed between the outer wall of the filter tube (432) and the inner wall of the cylindrical shell (42), and the sewage pipe (411) is in communication with the sewage space (45); The outer wall of the filter tube (432) is provided with a plurality of water-permeable holes (4321), and the water-permeable holes (4321) are connected to the clean water space (44) and the sewage space (45); The filter tube (432) is sheathed with a first filter layer (434) on the outside, and the first filter layer (434) covers all the water-permeable holes (4321); A plurality of first sliding rods (4711) are provided on the bottom plate (433), and the length direction of the first sliding rods (4711) is arranged along the axial direction of the filter tube (432); A plurality of first sliding holes (4712) are provided on one side of the filter tube (432) facing the bottom plate (433), and the plurality of first sliding holes (4712) are sequentially spaced along the circumference of the filter tube (432); The first sliding hole (4712) and the first sliding rod (4711) are arranged in a one-to-one correspondence, one end of the first sliding rod (4711) is connected to the bottom plate (433), and the other end is plugged into the corresponding first sliding hole (4712), and the first sliding rod (4711) is slidably connected to the inner side wall of the corresponding first sliding hole (4712); A top plate (437) is provided in the filter tube (432), the top plate (437) is connected to the filter tube (432), and the top plate (437) is spaced apart from the bottom plate (433) along the axial direction of the filter tube (432); A sliding tube (461) and a sliding column (462) are provided between the top plate (437) and the bottom plate (433); the sliding tube (461) is located in the filter tube (432), and the sliding tube (461) and the filter tube (432) are coaxially arranged; one end of the sliding tube (461) is connected to the top plate (437), and the other end is sleeved on the outside of the sliding column (462); one end of the sliding column (462) is connected to the bottom plate (433), and the sliding tube (461) is slidably connected to the sliding column (462) along its own axial direction; A locking piece (463) is provided on the sliding tube (461), and the locking piece (463) is used to lock the sliding tube (461) and the sliding column (462).

2. A multi-stage filtering kitchen appliance according to claim 1, characterized in that: The plurality of filter units (4) include a coarse filter unit (401), a fine filter unit (402), an oil removal unit (403), and an adsorption unit (404); the water inlet pipe (2), the coarse filter unit (401), the fine filter unit (402), the oil removal unit (403), the adsorption unit (404), and the water outlet pipe (3) are sequentially connected; The coarse filtration unit (401) is used to filter large solid impurities in sewage; the fine filtration unit (402) is used to filter small solid impurities in sewage; the oil removal unit (403) is used to filter grease in sewage; and the adsorption unit (404) is used to adsorb impurities in sewage.

3. The multi-stage filtering kitchen appliance according to claim 1, characterized in that: The intermediate extension tube (422) comprises a plurality of intermediate rings (4221), the plurality of intermediate rings (4221) are coaxially arranged in sequence, and the top tube (421), the plurality of intermediate rings (4221) and the bottom tube (423) are coaxially detachably connected in sequence.

4. A multi-stage filtering kitchen appliance according to claim 1, characterized in that: A plurality of first elastic rings (481) are provided at the lower end of the filter tube (432), and the first elastic rings (481) are provided in a one-to-one correspondence with the first sliding rods (4711). The first elastic rings (481) are sleeved on the outside of the corresponding first sliding rods (4711), and the first elastic rings (481) are provided on the inner side walls of the corresponding first sliding holes (4712).

5. The multi-stage filtering kitchen appliance according to claim 1, characterized in that: The filter tube (432) comprises a first tube rack (4322) and a second tube rack (4323); the first tube rack (4322) is sleeved on the outside of the second tube rack (4323); the water-permeable hole (4321) penetrates both the first tube rack (4322) and the second tube rack (4323); an inner wall of the first tube rack (4322) and an outer wall of the second tube rack (4323) are spaced to form an interlayer space; The first pipe rack (4322) and the second pipe rack (4323) are both located between the cap (431) and the bottom plate (433) along their own axial directions, the first pipe rack (4322) and the second pipe rack (4323) are both detachably connected to the bottom plate (433), and the first pipe rack (4322) and the second pipe rack (4323) are both detachably connected to the cap (431); The filter element (43) further comprises a filling layer (436) and a second filter layer (435), wherein the first filter layer (434) is sleeved on the outside of the first pipe rack (4322), the filling layer (436) is inserted in the interlayer space, and the second filter layer (435) is inserted in the second pipe rack (4323), and the first filter layer (434), the second filter layer (435) and the filling layer (436) all cover all the water-permeable holes (4321).

6. The multi-stage filtering kitchen appliance according to claim 1, characterized in that: A pressure gauge (413) is provided on the top pipe (421).

7. The multi-stage filtering kitchen appliance according to claim 1, characterized in that: An ultraviolet lamp tube (424) is provided in the cylindrical shell (42).

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