Deodorizing floor drain
By designing a through-type structure between the drain body and the sleeve and a water seal layer in the drainage floor drain, combined with a hair cutting device, the problems of odor backflow and blockage are solved, achieving efficient odor prevention and anti-blockage functions, and improving the performance and safety of the drainage system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI HANYANG TECH DEV CO LTD
- Filing Date
- 2025-06-03
- Publication Date
- 2026-05-05
AI Technical Summary
Existing floor drains lack effective sealing structures, which makes it easy for foul odors from the sewers to flow back, affecting indoor air quality and increasing hygiene risks.
An odor-proof floor drain was designed, including a drain body and a sleeve. The drain body and the sleeve are connected by a through-wall structure. The base forms a water seal layer to prevent odor backflow. The drain body is equipped with a partition plate and a blade for cutting hair to prevent blockage.
It effectively prevents sewer odors from flowing back, improves indoor air quality, ensures smooth operation of the drainage system, reduces hair blockage, and enhances reliability and durability.
Smart Images
Figure CN224200004U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of drainage floor drain technology, and in particular to an odor-proof floor drain. Background Technology
[0002] Floor drains are essential devices in building drainage systems for removing standing water from floors, widely used in kitchens, bathrooms, and other areas. Water flowing into the floor drain is initially filtered by a filter before flowing into the sewer system. However, most floor drains on the market lack an effective sealing structure, allowing sewer odors to easily flow back into the room, affecting indoor air quality and comfort. Furthermore, these odors may contain harmful gases, posing a potential health threat with prolonged exposure. Simultaneously, floor drains lacking a proper seal are also prone to pest infestations, increasing hygiene risks. Utility Model Content
[0003] In view of this, the present invention proposes an odor-proof floor drain, which aims to solve the problem that existing drainage floor drains, due to the lack of an effective sealing structure, cause odors to easily flow back.
[0004] This utility model proposes an odor-proof floor drain, including a floor drain body and a sleeve. Both the floor drain body and the sleeve are tubular structures. The sleeve includes a cylindrical body and a base. The cylindrical body is a through-structure and is sleeved on the outside of the floor drain body. There is a gap between the side wall of the floor drain body and the side wall of the cylindrical body. The side wall of the floor drain body is also provided with a through-structure communicating with the gap. The base is a hollow structure with an upward opening. The bottom of the cylindrical body extends into the hollow area of the base through the upward opening and connects to the inner wall of the base. The upward opening of the base is not completely closed by the bottom of the cylindrical body.
[0005] In one possible implementation, the drain body includes a housing, a control circuit, a motor, and a cutter. The housing is a hollow tubular structure with an internal partition plate. The partition plate divides the hollow area of the housing into an upper chamber and a lower chamber. The control circuit and the motor are located in the lower chamber, and the cutter is located in the upper chamber. The control circuit and the motor are electrically connected. The partition plate has a first through hole, through which the output shaft of the motor passes and connects to the cutter. The cutter can rotate around the output shaft. The housing has a corresponding perforated structure around the cutter. The upper chamber is connected to the cylindrical body through the perforated structure, and the lower chamber is not connected to the cylindrical body and is a sealed structure. When the control circuit starts the motor, the motor drives the cutter to rotate through the output shaft to cut hair located near the cutter.
[0006] In one possible implementation, the drain body further includes a battery located in the lower chamber and electrically connected to the control circuit.
[0007] In one possible implementation, the drain body is movably connected to the sleeve and can move up and down relative to the sleeve. The control circuit includes a mechanical switch. A second through hole is provided at the bottom of the housing. The control circuit is located at the bottom of the housing, and the mechanical switch extends out of the housing through the second through hole. The sleeve also includes a spring. A support column is provided in the central area of the bottom of the cylinder. The spring is sleeved on the outside of the support column. One end of the spring is connected to the support column, and the other end of the spring contacts or is close to the bottom of the housing. One end of the support column is connected to the inner wall of the base, and the other end of the support column is located below the bottom of the housing and directly opposite the mechanical switch.
[0008] When the housing moves downward relative to the cylinder, the mechanical switch abuts against the support column to start the motor, and the spring is in a compressed state; when the spring is in a reset state, the spring pushes the housing upward, and the mechanical switch and the support column separate to shut off the motor.
[0009] In one possible implementation, a fastener is provided on the side of the housing, and a through groove is provided on the cylinder corresponding to the position of the fastener. The fastener is engaged with the through groove and can move up and down relative to the cylinder along the through groove.
[0010] In one possible implementation, the cutting tool includes a first cutting head and a second cutting head. The first cutting head includes a disc-shaped first bottom surface and a plurality of strip-shaped first blades. All the first blades are separately arranged and vertically parallel, and all the first blades are connected to the edge of the first bottom surface to form a first perimeter of the first bottom surface. The second cutting head includes a disc-shaped second bottom surface and a plurality of strip-shaped second blades. All the second blades are separately arranged and vertically parallel, and all the second blades are connected to the edge of the second bottom surface to form a second perimeter of the second bottom surface. The first cutting head is sleeved on the outside of the second cutting head and the two are concentrically arranged. A third through hole is provided at the center of the first bottom surface, and the output shaft passes through the third through hole and is connected to the center of the second bottom surface.
[0011] In one possible implementation, the thickness of the left end of the first blade is the same as the thickness of the right end, and the thickness of the left end of the second blade is less than the thickness of the right end.
[0012] In one possible implementation, the drain body further includes a top cover, one end of which is hinged to the top of the housing, and the other end of which is provided with a snap-fit position. The top of the housing is also provided with a snap-fit part. When one end of the top cover rotates around the hinge pin and the snap-fit part is engaged with the snap-fit position, the cutter is located below the top cover and is blocked by the top cover. There is a gap between the top cover and the upper surface of the top of the housing.
[0013] In one possible implementation, an annular guide groove is provided on the upper surface of the top of the housing, the top cover is located above the central region surrounded by the annular guide groove, and the cutter is located below the central region surrounded by the annular guide groove.
[0014] In one possible implementation, the sleeve further includes a rubber ring fitted onto the outer side of the upper end of the cylinder.
[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: An odor-proof floor drain includes a drain body and a sleeve. Both the drain body and the sleeve are tubular structures. The sleeve includes a cylindrical body and a base. The cylindrical body is a through-structure and is fitted onto the outside of the drain body. There is a gap between the side wall of the drain body and the side wall of the cylindrical body. The side wall of the drain body also has a through-structure communicating with the gap. The base is a hollow structure with an upward opening. The bottom of the cylindrical body extends into the hollow area of the base through the upward opening and connects to the inner wall of the base. The upward opening of the base is not completely closed by the bottom of the cylindrical body. It can be seen that the drain body and the sleeve are interlocked, and the drain body is interconnected with the sleeve through the through-structure of the side wall, forming a drainage channel. Water first flows into the drain body from above, then flows into the cylindrical body through the side wall of the drain body and into the base, and finally exits from the upward opening of the base. The entire drainage process is unobstructed. The base is a hollow structure with an upward-facing opening, allowing water to flow in and store a certain amount to form a water seal. This water seal effectively prevents the backflow of sewer odors, improving indoor air quality. Furthermore, the cylindrical body acts as a shielding layer above the water seal, effectively reducing the area of the water surface directly exposed to air and restricting airflow from the top of the water surface. Air can only flow through the upward-facing opening on the side of the base, thus effectively slowing down water evaporation and enhancing the stability and durability of the water seal. This odor-proof floor drain ensures smooth operation of the drainage system while effectively preventing the backflow of sewer odors, significantly improving overall performance and reliability. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of the odor-proof floor drain provided in an embodiment of the present utility model;
[0017] Figure 2This is a schematic diagram of the structure of the drain body provided in an embodiment of the present utility model;
[0018] Figure 3 This is a schematic diagram of the structure of the shell and top cover provided in an embodiment of the present utility model;
[0019] Figure 4 A first structural schematic diagram of the drain body after removing the shell and top cover, provided for an embodiment of this utility model;
[0020] Figure 5 This is a structural disassembly diagram of the drain body after removing the shell and top cover, provided in an embodiment of the present utility model.
[0021] Figure 6 A second structural schematic diagram of the drain body with the shell and top cover removed, provided for an embodiment of this utility model;
[0022] Figure 7 A schematic diagram of the sleeve provided in an embodiment of this utility model;
[0023] Figure 8 This is a structural disassembly diagram of the sleeve provided in an embodiment of the present utility model;
[0024] Figure 9 This is a schematic diagram of the structure of the cylinder provided in an embodiment of the present utility model.
[0025] The annotations in the attached figures are explained as follows:
[0026] 11. Housing; 111. Fastener; 112. Divider; 12. Control circuit; 121. Battery; 122. Mechanical switch; 13. Motor; 141. First bottom surface; 142. First blade; 143. Second bottom surface; 144. Second blade; 15. Top cover; 16. Annular guide groove; 21. Cylinder; 211. Support column; 212. Through groove; 22. Base; 23. Spring; 24. Rubber ring. Detailed Implementation
[0027] The solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.
[0028] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and sliding situation between the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.
[0029] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0030] Please refer to Figure 1-9 As shown, this utility model proposes an odor-proof floor drain, including a floor drain body and a sleeve. Both the floor drain body and the sleeve are tubular structures. The sleeve includes a cylindrical body 21 and a base 22. The cylindrical body 21 is a vertically continuous structure and is sleeved on the outside of the floor drain body. There is a gap between the side wall of the floor drain body and the side wall of the cylindrical body 21. The side wall of the floor drain body is also provided with a through structure communicating with the gap. The base 22 is a hollow structure with an upward opening. The bottom of the cylindrical body 21 extends into the hollow area of the base 22 through the upward opening and is connected to the inner wall of the base 22. The upward opening of the base 22 is not completely closed by the bottom of the cylindrical body 21.
[0031] Specifically, both the drain body and the sleeve are tubular structures, interconnected by a through-structure on the side wall of the drain body to ensure that water flowing into the drain body can smoothly flow into the sleeve. A gap exists between the drain body and the sleeve 21, serving as a water flow channel to ensure smooth water flow within the sleeve 21. The base 22 has an upward-facing opening, which is not completely sealed by the bottom of the sleeve 21. This upward-facing opening not only facilitates the flow of water through the sleeve 21 into the base 22 but also ensures that water is smoothly discharged into the sewer pipe. This drainage process achieves multi-channel coordinated drainage, ensuring a smooth and unobstructed flow throughout.
[0032] Specifically, the base 22 is a hollow structure with an upward opening and an internal water storage space of a certain capacity. Water flowing into this space is stored and forms a water seal layer of a certain thickness. This water seal layer effectively prevents the backflow of odors and harmful gases from the sewer pipes, improving the odor-proof effect. Furthermore, because there are gaps between the drain body and the sleeve, water entering the cylinder 21 must pass through these narrow channels to flow into the base 22. The water flow is dispersed during the flow process, reducing kinetic energy and effectively avoiding concentrated and violent impacts on the water seal layer, further ensuring its stability. Therefore, the sleeve design is reasonable and can effectively buffer water flow impacts, maintaining a long-term effective seal.
[0033] Compared with existing technologies, the odor-proof floor drain proposed in this embodiment has a drain body and a sleeve that are interlocked. The drain body is connected to the sleeve through a through-structure on its side wall, forming a drainage channel. Water first flows into the drain body from above, then flows through the side wall of the drain body into the cylinder 21 and into the base 22, and finally exits from the upward-facing opening of the base 22. The entire drainage process is unobstructed. The base 22 is a hollow structure with an upward-facing opening, which can store a certain amount of water after water flows in to form a water seal. This water seal, as a sealing structure, can effectively prevent the backflow of sewer odors and improve indoor air quality. In addition, the presence of the cylinder 21 is equivalent to forming a shielding layer above the water seal, which can effectively reduce the area of the water surface directly exposed to the air and restrict air from flowing directly from the top of the water surface. Air can only flow through the side of the upward-facing opening of the base 22, thereby effectively slowing down water evaporation and enhancing the stability and durability of the water seal. This odor-proof floor drain not only ensures the smooth operation of the drainage system, but also effectively prevents the backflow of odors from the sewer, significantly improving overall performance and reliability.
[0034] In some embodiments of this application, the drain body includes a housing 11, a control circuit 12, a motor 13, and a cutter. The housing 11 is a hollow tubular structure with an internal partition plate 112. The partition plate 112 divides the hollow area of the housing 11 into an upper chamber and a lower chamber. The control circuit 12 and the motor 13 are located in the lower chamber, and the cutter is located in the upper chamber. The control circuit 12 and the motor 13 are electrically connected. The partition plate 112 has a first through hole, and the output shaft of the motor 13 passes through the first through hole and connects to the cutter. The cutter can rotate around the output shaft. The housing 11 has a corresponding hollow structure around the cutter. The upper chamber is connected to the cylinder 21 through the hollow structure, and the lower chamber is not connected to the cylinder 21 and is a sealed structure. When the control circuit 12 starts the motor 13, the motor 13 drives the cutter to rotate through the output shaft in order to cut hair located near the cutter.
[0035] Specifically, the partition plate 112 divides the interior of the housing 11 into an upper chamber and a lower chamber. The upper chamber is used to install the cutting tool, and the lower chamber is used to house the control circuit 12 and the motor 13. This partition design effectively prevents the motor 13 and the control circuit 12 from being directly exposed to water or debris, significantly improving the safety of the drain body. The motor 13 is located in the lower chamber, and its output shaft passes through the first through hole of the partition plate 112 to connect to the cutting tool. The rotational power of the motor 13 can be directly and efficiently transmitted to the cutting tool, reducing energy loss during power transmission. The housing 11 has a hollow structure corresponding to the position surrounding the cutting tool (in this embodiment, the hollow structure is equivalent to the through structure of the side wall of the drain body). The upper chamber is connected to the cylinder 21 through the hollow structure, ensuring that the cutting tool can fully contact and cut the hair that enters the drain body with the water flow, effectively preventing hair from tangling and clogging the drainage channel. At the same time, the hollow structure design also helps to catch most of the hair in the water flow, further improving the hair capture ability and cutting efficiency. It should be noted that although the partition plate 112 is provided with a first through hole, the lower chamber can still be kept sealed by the combination of the rubber sealing ring, waterproof strip and waterproof plate, and is not connected to the cylinder 21. This effectively prevents water vapor and impurities from entering the lower chamber, protects the motor 13 and the control circuit 12, and extends the service life of the odor-proof floor drain.
[0036] In some embodiments of this application, the drain body further includes a battery 121, which is located in the lower chamber and electrically connected to the control circuit 12.
[0037] Specifically, the lower chamber is also equipped with a battery 121, which serves as a power source and is electrically connected to the control circuit 12, ensuring a stable power supply to the control circuit 12. If the battery 121 is rechargeable, a charging interface can also be provided on the housing 11 to facilitate convenient charging of the battery 121 and enable cyclic use.
[0038] In some embodiments of this application, the drain body is movably connected to the sleeve and can move up and down relative to the sleeve. The control circuit 12 includes a mechanical switch 122. A second through hole is provided at the bottom of the housing 11. The control circuit 12 is located at the bottom of the housing 11 and the mechanical switch 122 extends out of the housing 11 through the second through hole. The sleeve also includes a spring 23. A support column 211 is provided in the central area of the bottom of the cylinder 21. The spring 23 is sleeved on the outside of the support column 211. One end of the spring 23 is connected to the support column 211, and the other end of the spring 23 contacts or is close to the bottom of the housing 11. One end of the support column 211 is connected to the inner wall of the base 22, and the other end of the support column 211 is located below the bottom of the housing 11 and directly opposite the mechanical switch 122.
[0039] When the housing 11 moves downward relative to the cylinder 21, the mechanical switch 122 abuts against the support column 211 to start the motor 13, and the spring 23 is in a compressed state; when the spring 23 is in a reset state, the spring 23 pushes the housing 11 upward, and the mechanical switch 122 and the support column 211 separate to shut off the motor 13.
[0040] Specifically, the control circuit 12 is equipped with a mechanical switch 122, which extends out of the housing 11 through a second through hole at the bottom of the housing 11. Combined with a sealing design, this effectively prevents moisture from entering the control circuit 12. When the user steps on or presses the drain body downwards, the mechanical switch 122 abuts against the support column 211, triggering the motor 13. When the user stops operating, the drain body moves upwards under the restoring force of the spring 23, separating the mechanical switch 122 from the support column 211, and the motor 13 shuts off. This drain body can directly trigger the mechanical switch 122 through simple mechanical action, achieving rapid start and stop of the motor 13. The structure is simple, the operation is convenient, and there is no need to process complex electronic signals, reducing the complexity of the system design. In addition to the mechanical switch 122, the control circuit 12 can also use remote control, voice, or infrared sensing to start and stop the motor 13, which will not be elaborated here.
[0041] In some embodiments of this application, a fastener 111 is provided on the side of the housing 11, and a through groove 212 is provided on the cylindrical body 21 corresponding to the position of the fastener 111. The fastener 111 is engaged with the through groove 212 and can move up and down relative to the cylindrical body 21 along the through groove 212.
[0042] Specifically, the latching element 111 engages with the through groove 212 to form a guiding and limiting structure for the latching element 111. The through groove 212 is a longitudinal opening, which restricts the movement trajectory of the latching element 111, ensuring that the drain body moves smoothly in a predetermined vertical direction within the sleeve, effectively preventing lateral swaying, detachment, and jamming of the drain body, and ensuring the stability and accuracy of movement. The mechanical cooperation structure between the latching element 111 and the through groove 212 is simple and durable, suitable for long-term use. Of course, the vertical movement mechanism of the drain body relative to the sleeve can also adopt sliding rails, sliders, magnetic attraction, etc., which will not be elaborated here.
[0043] In some embodiments of this application, the cutting tool includes a first cutting head and a second cutting head. The first cutting head includes a disc-shaped first bottom surface 141 and a plurality of strip-shaped first blades 142. All the first blades 142 are separately arranged and vertically parallel. All the first blades 142 are connected to the edge of the first bottom surface 141 to form a first perimeter of the first bottom surface 141. The second cutting head includes a disc-shaped second bottom surface 143 and a plurality of strip-shaped second blades 144. All the second blades 144 are separately arranged and vertically parallel. All the second blades 144 are connected to the edge of the second bottom surface 143 to form a second perimeter of the second bottom surface 143. The first cutting head is sleeved on the outside of the second cutting head and the two are concentrically arranged. A third through hole is provided at the center of the first bottom surface 141. The output shaft passes through the third through hole and is connected to the center of the second bottom surface 143.
[0044] Specifically, the cutter employs a dual-blade structure. The first blade remains stationary, while the second blade rotates via the output shaft of motor 13, creating a scissor-like relative motion. Hair is clamped between the two sets of blades, and the rotating second blade 144 generates a shearing force relative to the stationary first blade 142, achieving efficient and thorough hair cutting. Compared to traditional single-rotating blades relying on friction and cutting, this shearing-type cutting method, through the relative motion of two sets of blades, simulates the shearing principle of scissors, effectively avoiding problems such as hair pulling, entanglement, and incomplete cutting, significantly improving cutting quality and efficiency. Especially in the application of odor-proof floor drains, this design effectively reduces hair entanglement and clogging, improving the continuous working capacity and service life of the odor-proof floor drain.
[0045] In some embodiments of this application, the thickness of the left end of the first blade 142 is the same as the thickness of the right end, and the thickness of the left end of the second blade 144 is less than the thickness of the right end.
[0046] Specifically, the first blade 142 has a uniform thickness, while the second blade 144 is thinner at the left end and thicker at the right end, with a uniform thickness in the middle. This design effectively avoids excessive interference between the two sets of blades during hair cutting, ensuring a smooth cutting process. The thinner left end of the second blade 144 results in a smaller cutting gap, which is beneficial for the initial clamping and cutting of the hair; the thicker right end helps to push and expel the cut debris and hair, preventing blockage. This blade thickness distribution balances precise clamping, smooth cutting, and smooth chip removal, significantly improving the cutting performance and service life of the blade.
[0047] In some embodiments of this application, the drain body further includes a top cover 15, one end of which is hinged to the top of the housing 11, and the other end of which is provided with a snap-fit position. The top of the housing 11 is also provided with a snap-fit part. When one end of the top cover 15 rotates around the hinge pin and the snap-fit part is engaged with the snap-fit position, the cutter is located below the top cover 15 and is blocked by the top cover 15. There is a gap between the top cover 15 and the upper surface of the top of the housing 11.
[0048] Specifically, the top cover 15 serves two purposes: firstly, it effectively protects the blade from direct exposure, preventing accidental contact or injury; secondly, it provides a flat surface for easy foot or hand pressure, enhancing comfort and safety. The gap between the top cover 15 and the housing 11 ensures smooth water flow into the drain body, maintaining drainage efficiency. The locking mechanism allows the top cover 15 to be easily opened and closed, facilitating regular cleaning and maintenance of the blade, and ensuring the drain body remains in good working order.
[0049] In some embodiments of this application, an annular guide groove 16 is provided on the upper surface of the top of the housing 11, the top cover 15 is located above the central region surrounded by the annular guide groove 16, and the cutter is located below the central region surrounded by the annular guide groove 16.
[0050] Specifically, the annular guide channel 16 is a closed annular structure that forms a groove with a height difference around the central area of the housing 11, used to guide and control the direction of water flow. This annular guide channel 16 can quickly and effectively guide water flow to the central area of the housing 11, ensuring that water flows smoothly into the drain body, reducing water flow turbulence, and thus improving overall drainage efficiency.
[0051] In some embodiments of this application, the sleeve further includes a rubber ring 24, which is fitted onto the outer side of the upper end of the cylinder 21.
[0052] Specifically, the rubber ring 24 enhances the sealing performance of the sleeve, effectively preventing water leakage through the gap between the odor-proof drain and the floor, ensuring that water flows out along the designed drainage channel. Preferably, the rubber ring 24 consists of three parallel rubber rings with equal spacing. The three-ring structure not only improves the fit between the rubber ring 24 and the side wall of the cylinder 21, but also forms multiple sealing layers when the sleeve is under pressure, further improving the waterproof effect and ensuring a reliable seal between the sleeve and the ground.
[0053] The odor-proof floor drain provided by this utility model not only features a water-sealing structure to effectively prevent odor backflow and maintain fresh indoor air, but also includes a cutter to cut hair, preventing hair from clogging the drainage channel and improving drainage smoothness. The overall design of the odor-proof floor drain combines odor prevention and anti-clogging functions, significantly improving the practicality and durability of the floor drain.
[0054] It should be noted that the technical solutions of the various embodiments of this utility model can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0055] The above description is only a part or preferred embodiment of this utility model. Neither the text nor the drawings should limit the scope of protection of this utility model. All equivalent structural transformations made using the content of this utility model specification and drawings under the overall concept of this utility model, or direct / indirect applications in other related technical fields, are included within the scope of protection of this utility model.
Claims
1. An odor-proof floor drain, characterized in that, The drain includes a drain body and a sleeve, both of which are tubular structures. The sleeve includes a cylindrical body and a base. The cylindrical body is a through-structure and is fitted onto the outside of the drain body. There is a gap between the side wall of the drain body and the side wall of the cylindrical body. The side wall of the drain body also has a through-structure that communicates with the gap. The base is a hollow structure with an upward opening. The bottom of the cylindrical body extends into the hollow area of the base through the upward opening and connects to the inner wall of the base. The upward opening of the base is not completely closed by the bottom of the cylindrical body.
2. The odor-proof floor drain according to claim 1, characterized in that, The drain body includes a shell, a control circuit, a motor, and a cutter. The shell is a hollow tubular structure with an internal partition plate. The partition plate divides the hollow area of the shell into an upper chamber and a lower chamber. The control circuit and the motor are located in the lower chamber, and the cutter is located in the upper chamber. The control circuit and the motor are electrically connected. The partition plate has a first through hole, through which the output shaft of the motor passes and connects to the cutter. The cutter can rotate around the output shaft. The shell has a corresponding perforated structure around the cutter. The upper chamber is connected to the cylindrical body through the perforated structure, while the lower chamber is not connected to the cylindrical body and is a sealed structure. When the control circuit starts the motor, the motor drives the cutter to rotate through the output shaft to cut hair located near the cutter.
3. The odor-proof floor drain according to claim 2, characterized in that, The drain body also includes a battery, which is located in the lower chamber and electrically connected to the control circuit.
4. The odor-proof floor drain according to claim 2, characterized in that, The drain body is movably connected to the sleeve and can move up and down relative to the sleeve. The control circuit includes a mechanical switch. A second through hole is provided at the bottom of the housing. The control circuit is located at the bottom of the housing and the mechanical switch extends out of the housing through the second through hole. The sleeve also includes a spring. A support column is provided in the central area of the bottom of the cylinder. The spring is sleeved on the outside of the support column. One end of the spring is connected to the support column, and the other end of the spring contacts or is close to the bottom of the housing. One end of the support column is connected to the inner wall of the base, and the other end of the support column is located below the bottom of the housing and directly opposite the mechanical switch. When the housing moves downward relative to the cylinder, the mechanical switch abuts against the support column to start the motor, and the spring is in a compressed state; When the spring is in the reset state, the spring pushes the housing upward, and the mechanical switch and the support column separate to shut down the motor.
5. The odor-proof floor drain according to claim 4, characterized in that, The side of the housing is provided with a fastening element, and the cylinder is provided with a through groove corresponding to the position of the fastening element. The fastening element is engaged with the through groove and can move up and down relative to the cylinder along the through groove.
6. The odor-proof floor drain according to claim 2, characterized in that, The cutting tool includes a first cutting head and a second cutting head. The first cutting head includes a disc-shaped first bottom surface and a plurality of strip-shaped first blades. All the first blades are separately arranged and vertically parallel. All the first blades are connected to the edge of the first bottom surface to form a first perimeter of the first bottom surface. The second cutting head includes a disc-shaped second bottom surface and a plurality of strip-shaped second blades. All the second blades are separately arranged and vertically parallel. All the second blades are connected to the edge of the second bottom surface to form a second perimeter of the second bottom surface. The first cutting head is sleeved on the outside of the second cutting head and the two are concentrically arranged. A third through hole is provided at the center of the first bottom surface. The output shaft passes through the third through hole and is connected to the center of the second bottom surface.
7. The odor-proof floor drain according to claim 6, characterized in that, The thickness of the left end of the first blade is the same as the thickness of the right end, while the thickness of the left end of the second blade is less than the thickness of the right end.
8. The odor-proof floor drain according to claim 2, characterized in that, The drain body also includes a top cover, one end of which is hinged to the top of the housing, and the other end of which is provided with a snap-fit position. The top of the housing is also provided with a snap-fit part. When one end of the top cover rotates around the hinge pin and the snap-fit part is engaged with the snap-fit position, the cutter is located below the top cover and is blocked by the top cover. There is a gap between the top cover and the upper surface of the top of the housing.
9. An odor-proof floor drain according to claim 8, characterized in that, The upper surface of the top of the housing is provided with an annular guide groove, the top cover is located above the central area surrounded by the annular guide groove, and the cutter is located below the central area surrounded by the annular guide groove.
10. An odor-proof floor drain according to claim 1, characterized in that, The sleeve also includes a rubber ring, which is fitted onto the outer side of the upper end of the sleeve.