Odor-resistant floor drain core with internal filter element with reducing pipe diameter
By using a tapered inner core design, the problems of easy clogging of the drain core and complex mechanical structure are solved, achieving efficient drainage and odor prevention, and reducing maintenance frequency and cost.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XIUMU FURNITURE (SHENZHEN) CO LTD
- Filing Date
- 2025-06-30
- Publication Date
- 2026-05-26
AI Technical Summary
Existing floor drain cores are prone to clogging, leading to poor drainage. They require frequent cleaning and maintenance, and their mechanical structure is complex, costly, and components are easily damaged.
The inner tube core design with a tapered diameter includes an upper tapered tube and a lower duckbill section. It is connected to the filter cartridge through a detachable nested structure. After the water flows from the tapered tube into the duckbill section, it forms turbulence. The shear force removes debris and forms a water seal layer in the lower duckbill section to prevent odor.
It achieves efficient drainage, reduces maintenance workload, lowers manufacturing costs, ensures odor prevention, and avoids the complexity and vulnerability of mechanical structures.
Smart Images
Figure CN224281525U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of odor-proof floor drain cores, and in particular to an odor-proof floor drain core with an internal filter element having a gradually narrowing pipe diameter. Background Technology
[0002] Floor drains typically consist of a panel, filter, drain channel, and U-trap. The panel covers the drain opening, the filter traps hair and debris to prevent clogging, and traditional floor drains use a combination of the drain and a U-trap for insect and odor prevention. Water-sealed filters are a more traditional structure, usually consisting of the drain body and an internal U-trap. The U-trap, similar to a U-shaped or S-shaped pipe, stores water to block sewer odors. Some water-sealed filters have an additional filter above the U-trap to trap hair and debris and prevent clogging. Another type is the mechanical seal filter, which uses springs, magnetism, or gravity to achieve a seal. Common types include spring-loaded and magnetic types. Spring-loaded filters have a spring-controlled sealing cap, while magnetic filters use magnetism to open and close the sealing components. Traditional floor drain odor-proof filter cartridges have several problems. The separately designed water storage pipe takes up a lot of space, and some filter cartridges are prone to clogging due to their narrow internal cavities, resulting in poor drainage and requiring frequent cleaning and maintenance. Filter cartridges with cumbersome mechanical structures are not only expensive to manufacture, but their mechanical parts are also prone to damage, affecting their odor-proof performance. Utility Model Content
[0003] In order to overcome the shortcomings and deficiencies of the existing technology, this utility model provides an odor-proof floor drain core with an internal filter element that has a gradually narrowing pipe diameter. This is used to solve the technical problems of existing floor drain cores, which are prone to clogging, resulting in poor drainage, requiring frequent cleaning and maintenance, and have complex mechanical structures, high costs, and easily damaged components that affect the performance of the product.
[0004] This utility model achieves the above-mentioned objective through the following technical solution: an odor-proof floor drain core with a tapered internal filter element, comprising a filter cylinder and an inner core, wherein the filter cylinder comprises a drain section and a water storage section, the filter cylinder wall of the drain section has a through hole for drainage, the water storage section is located at the lower part of the drain section, the filter cylinder wall and the bottom of the water storage section are both waterproof structures, the lowest through hole of the drain section is the lowest drainage position, and the inner core comprises an upper tapered tube and a lower duckbill section, wherein the water outlet of the lower duckbill section is located below the lowest drainage position.
[0005] Preferably, the inner core is assembled in the filter cartridge via a detachable nested structure, wherein the detachable nested structure is a snap-fit structure or a spiral-patterned fit structure.
[0006] Preferably, the filter cartridge has a cylindrical structure.
[0007] Preferably, the lower duckbill section corresponds to the upper starting position of the through hole, ensuring that the drainage space at the through hole is greater than the space between the upper tapering tube and the filter cartridge.
[0008] Preferably, the diameter at the inlet of the upper tapering tube is twice the short arc chord length of the lower duckbill section.
[0009] Preferably, the cross-section of the lower duckbill segment is racetrack-shaped or elongated elliptical.
[0010] Preferably, the arc surface where the through hole of the drain section is located corresponds to the long side of the duckbill section, and no through hole is provided on the arc surface of the drain section corresponding to the short side of the duckbill section.
[0011] Preferably, a sealing element is provided at the water inlet of the filter cartridge to seal the gap between the filter cartridge and the floor drain during installation, preventing the odor from the sewer from escaping.
[0012] Preferably, the through holes are arranged in a matrix on the filter cartridge wall opposite to the long side of the lower duckbill section.
[0013] Preferably, the through holes are elongated holes that are evenly distributed.
[0014] Compared with the prior art, the beneficial effects obtained by this utility model are:
[0015] This utility model discloses an odor-proof floor drain core with a tapered internal filter element, comprising a filter cartridge and an inner core. The inner core is detachably nested within the filter cartridge. The filter cartridge includes a drain section and a water storage section. The filter cartridge wall of the drain section has through holes for drainage. The water storage section is located below the drain section. The main body of the filter cartridge is cylindrical. The filter cartridge wall and bottom of the water storage section are waterproof. The lowest through hole in the drain section is the lowest drainage level. The inner core includes an upper tapered tube and a lower duckbill section. The outlet port of the lower duckbill section is located below the lowest drainage level. The lower duckbill section is synchronized with the starting position above the through hole of the drain section. In use, water flows out from the outlet port of the lower duckbill section to the water storage section. The water level rises to the lowest drainage level of the drain section, begins filtration, and then discharges. The outlet port is lower than the lowest drainage level, forming a water seal layer. The lower duckbill section and... The increased space between the filter cylinder walls in the drainage section solves the technical problems of existing drain cores, such as easy clogging leading to poor drainage, frequent cleaning and maintenance, complex mechanical structure, high cost, and easily damaged components affecting performance. The starting position of the duckbill section is basically the same as that of the through hole, and the through hole is set on the arc surface of the filter cylinder corresponding to the long side of the duckbill section. A two-part mold can be used in the production process, which is less expensive than the four-part mold required to set the through hole on all four sides. At the same time, from the water inlet, the cross-section of the tapered tube and the duckbill section is further reduced, which increases the water flow velocity. When it hits the bottom of the water storage section, turbulence is formed. As the water level rises, the turbulent shear force causes hair and debris attached to the through hole of the drainage section to detach from the through hole and remain in a suspended state, ensuring the drainage of the through hole. It has the advantages of simple structure, large drainage capacity and low maintenance workload. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.
[0017] Figure 1 This is a schematic diagram of the odor-proof floor drain core with an internal filter element having a gradually narrowing pipe diameter, according to this utility model.
[0018] Figure 2 This is a front view of the odor-proof floor drain core with an internal filter element having a gradually narrowing pipe diameter, according to this utility model.
[0019] Figure 3 This is a cross-sectional view of the odor-proof floor drain core with an internal filter element having a gradually narrowing pipe diameter, according to this utility model.
[0020] Figure 4 This is a CC cross-sectional view of the odor-proof floor drain core with an internal filter element having a gradually decreasing pipe diameter according to this utility model.
[0021] Figure 5 This is a DD cross-sectional view of the odor-proof floor drain core with an internal filter element having a gradually narrowing pipe diameter according to this utility model.
[0022] Attached reference numerals: 1-Filter cartridge; 11-Drainage section; 111-Through hole; 12-Water storage section; 2-Inner tube core; 21-Upper tapering tube; 22-Lower duckbill section. Detailed Implementation
[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. However, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0024] Please see Figures 1 to 5 An odor-proof floor drain core with a gradually narrowing internal filter element includes a filter cartridge 1 and an inner core 2. The inner core 2 is detachably nested within the filter cartridge 1. The inner core 2 and the filter cartridge 1 are connected by a snap-fit structure or a spiral threaded connection structure. The filter cartridge 1 includes a drain section 11 and a water storage section 12. The filter cartridge wall of the drain section 11 has through holes 111 arranged in a matrix for drainage. The through holes 111 are uniformly distributed elongated holes. The water storage section 12 is located at the lower part of the drain section 11. The main body of the filter cartridge 1 is a cylindrical structure. The filter cartridge wall and bottom of the water storage section 12 are waterproof structures. The lowest row of through holes in the drain section 11 is the lowest drainage position. The water storage section 12 maintains a constant water level, and the outlet of the inner core 2 extends below the lowest drainage level, forming an effective water seal layer to prevent insects and odors. Based on the principle of statics, the water seal layer uses the gravity of water to form a pressure barrier, which can completely prevent the upward diffusion of odors from the sewer pipe. At the same time, the gap reserved between the lower end of the inner core and the water storage section maintains the water seal height during drainage, ensuring that the odor-preventing effect is not affected by drainage.
[0025] The inner tube core 2 includes an upper tapered tube 21 and a lower duckbill section 22. The water outlet of the lower duckbill section 22 is located below the lowest drainage position. The starting position of the lower duckbill section 22 is synchronized with the starting position of the through hole 111 of the drain section 11, that is, the starting position height of the lower duckbill section 22 and the drain section 11 are basically the same. The cross-section of the lower duckbill section 22 is racetrack-shaped or long elliptical. The arc surface of the filter cartridge 1 corresponding to the long side of the lower duckbill section 22 is provided with through holes 111, while the arc surface of the drain section 11 corresponding to the short side of the duckbill section 22 is not provided with through holes. The design uses a two-part mold during production, which is cheaper than a four-part mold with drain through holes on all four sides. The water inlet of the inner tube core 2 is basically the same size as the water inlet of the filter cartridge 1, allowing water to flow smoothly into the inner tube core. The water flows through the water outlet of the lower duckbill section 22, through the water storage section 12, and then into the filter cartridge 1. According to Bernoulli's equation, in the case of an ideal incompressible fluid where the change in gravitational potential energy is negligible, when the inner tube core 2 gradually narrows from the inlet downwards until its cross-sectional area is equal to half the cross-sectional area of the inner tube core at the inlet, based on the principle of constant flow rate, the water flow velocity increases to twice its original value, thus significantly increasing the kinetic energy of the water flow. According to the kinetic energy formula, the scouring force generated by the high-speed water flow can effectively prevent debris from depositing inside the pipe and improve drainage efficiency. The lower duckbill section 22 is a groove-shaped pipe opening in the shape of a duckbill. Based on the principle of fluid diffusion, on the one hand, it provides sufficient space for the through holes 111 on both sides of the filter cartridge 1, allowing the water flow to diffuse rapidly after flowing out of the through holes 111. On the other hand, the length of the lower end of the lower duckbill section 22 is still approximately equal to half the diameter of the inner tube core at the inlet. By controlling the change in pipe diameter, it is ensured that the water flow in the filter cartridge 1 and the inner tube core 2 can maintain pressure balance throughout the drainage process. According to Bernoulli's equation, at the same height, by controlling the relationship between flow velocity and cross-sectional area, the water pressure difference between the inner core 2 and the filter cartridge 1 can be kept within a very small range, thus avoiding local water accumulation or backflow caused by uneven flow velocity.
[0026] A sealing ring is provided at the inlet of the filter cartridge 1, and a handle is provided at the end. When the odor-proof drain core is installed on the drain, the sealing ring fits tightly against the gap between the drain and the drain core to prevent odor from escaping. When cleaning is required, the handle can help the drain core to be removed from the drain. Place the filter cartridge 1 into the drain mounting hole, ensuring that the sealing ring on the outside of the filter cartridge 1 fits tightly against the drain to achieve initial sealing and fixation. Then, align the inner tube core 2 with the installation position of the filter cartridge 1 and slowly insert it so that the inner tube core 2 and the filter cartridge 1 are embedded into each other. At this time, the inlet of the inner tube core 2 is aligned with the corresponding position of the filter cartridge 1, and the groove-shaped tube opening at the lower end of the inner tube core 2 is lower than the lowest drainage level of the through holes 111 on both sides of the filter cartridge 1.
[0027] Drainage Process: When water flows into the odor-proof drain core through the drain, the water first surges in large quantities from the inlet of the inner core 2, and then enters the filter cartridge 1 through the outlet at the lower end of the lower duckbill section 22. Since the diameter of the inner core 2 gradually decreases from the inlet downwards, according to the continuity equation and Bernoulli's equation, the water flow velocity increases, and the kinetic energy increases, enabling rapid flushing of the inner core 2 pipe and reducing debris adhesion. The water flows out from the duckbill-shaped outlet at the lower end of the inner core 2, and after reaching the lowest drainage level, it is discharged through the through holes 111 on both sides of the filter cartridge 1. The water flow paths of the inner core 2 and the filter cartridge 1 work together to ensure smooth drainage and a large drainage flow rate. During the drainage process, the pressure distribution and flow velocity changes of the water in the inner core 2 and filter cartridge 1 structures are interconnected. Through precise pipe diameter and structural design, efficient drainage is achieved.
[0028] Odor-proof process: When no water flows through, the water level in the water storage section 12 at the bottom of the filter cartridge 1 is maintained at a certain level. The inner tube core 2 extends into the water to form a water seal, effectively preventing odors from the sewer pipe from spreading upwards into the room. Even during drainage, due to the pre-reserved gap between the inner tube core 2 and the water storage section 12, the water seal will not be completely destroyed according to the principle of fluid dynamic balance, thus maintaining a good odor-proof effect. The sealing ring at the inlet of the filter cartridge 1 further ensures the seal between the drain and the drain core, preventing odors from leaking from the installation gaps.
[0029] Maintenance Process: Due to the simple structure of this odor-proof drain core, with no complex mechanical parts, maintenance is very convenient. When it is necessary to clean debris, simply pull the inner core 2 out of the filter cartridge 1, and then clean the inner core 2 and the filter cartridge 1 separately. The large diameter design and smooth inner wall of the inner core 2 make it difficult for debris to adhere, making cleaning more convenient; the through hole 111 and water storage section 12 of the filter cartridge 1 are also easy to clean, effectively reducing maintenance workload and costs.
[0030] The above examples are merely specific embodiments of this utility model. Obviously, this utility model is not limited to the above embodiments, and many similar modifications are possible. All variations that can be directly derived or conceived by those skilled in the art from the content disclosed in this utility model should be considered within the scope of protection of this utility model.
Claims
1. A deodorizing floor drain core having a tapered internal filter core, characterized in that, The filter includes a filter cartridge (1) and an inner core (2). The filter cartridge (1) includes a drain section (11) and a water storage section (12). The filter cartridge wall of the drain section (11) has a through hole (111) for drainage. The water storage section (12) is located at the lower part of the drain section (11). The filter cartridge wall and the bottom of the water storage section (12) are both impermeable structures. The lowest through hole of the drain section (11) is the lowest drainage position. The inner core (2) includes an upper tapered tube (21) and a lower duckbill section (22). The water outlet of the lower duckbill section (22) is located below the lowest drainage position.
2. The odor control floor drain core having a tapered internal filter core as claimed in claim 1 wherein, The inner core (2) is assembled in the filter cartridge (1) by a detachable nested structure, which is a snap-fit structure or a spiral joint structure.
3. The odor-proof drain core with a tapered internal filter element as described in claim 1, characterized in that, The filter cartridge (1) has a cylindrical structure.
4. The odor-proof drain core with a tapered internal filter element as described in claim 1, characterized in that, The lower duckbill section (22) corresponds to the upper starting position of the through hole (111), ensuring that the drainage space at the through hole (111) is greater than the space between the upper tapering pipe (21) and the filter cylinder (1).
5. The odor-proof drain core with a tapered internal filter element as described in claim 1, characterized in that, The diameter at the inlet of the upper tapering tube (21) is twice the short arc chord length of the lower duckbill section (22).
6. The odor-proof drain core with a tapered internal filter element as described in claim 1, characterized in that, The cross-section of the lower duckbill segment (22) is racetrack-shaped or elongated elliptical.
7. The odor-proof drain core with a tapered internal filter element as described in claim 6, characterized in that, The arc surface where the through hole (111) of the drain section (11) is located corresponds to the long side of the duckbill section (22), and no through hole is provided on the arc surface of the drain section (11) corresponding to the short side of the duckbill section (22).
8. The odor-proof drain core with a tapered internal filter element as described in claim 1, characterized in that, A sealing element is provided at the inlet of the filter cartridge (1) to seal the gap between the filter cartridge (1) and the floor drain during installation, so as to prevent the odor from the sewer from escaping.
9. The odor-proof drain core with a tapered internal filter element as described in claim 1, characterized in that, The through holes (111) are arranged in a matrix on the filter cylinder wall opposite to the long side of the lower duckbill section (22).
10. The odor-proof drain core with a tapered internal filter element as described in claim 1, characterized in that, The through holes (111) are elongated holes that are evenly distributed.