An electrically controlled drain valve and toilet
By designing an electrically controlled drain valve in the toilet and utilizing the connection structure between the reversing shaft and the overflow pipe, the problem of water tank overflow caused by drain valve failure was solved, water pressure and cost were reduced, and the popularity of smart toilets was increased.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BESTTER XIAMEN TECH
- Filing Date
- 2025-05-21
- Publication Date
- 2026-07-03
AI Technical Summary
Existing solenoid valve drainage devices for toilets have high water pressure requirements, high costs, and are prone to problems such as drain valve failure leading to water tank overflow.
An electrically controlled drain valve was designed, which is connected to the overflow pipe through a reversing shaft to keep it in constant communication with the drain channel, ensuring that water is discharged through the overflow pipe when the water level in the tank exceeds the limit, thus preventing overflow.
This effectively avoids water tank overflow caused by drain valve failure, reduces water pressure and cost requirements, and increases the popularity of smart toilets.
Smart Images
Figure CN224451813U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to bathroom products, and more particularly to toilets. Background Technology
[0002] Most toilet flushing devices are manual. To make them easier for users and to meet the demands of some consumers for high-end toilets, automatic flushing devices have been developed. These devices use a CPU to collect relevant information and issue an automatic flushing command. For example, upon receiving a signal that the user has gotten up, the CPU opens a solenoid valve to flush the toilet. This type of solenoid valve flushing device requires relatively high conditions: water pressure greater than 0.15 MPa and a large inlet pipe diameter. This results in high costs and hinders the widespread adoption of smart toilets. Furthermore, if the flush valve malfunctions, the tank may overflow. Utility Model Content
[0003] The main technical problem to be solved by this utility model is to provide an electrically controlled drain valve that can prevent water tank from overflowing due to drain valve failure.
[0004] To solve the above-mentioned technical problems, this utility model provides an electrically controlled drain valve, including: a base, a motor, a transmission module, and a reversing shaft;
[0005] The base is provided with a drainage channel, and the transmission module is connected between the output shaft of the motor and the reversing shaft, and is reverse-cooperative with the reversing shaft to change the rotation of the output shaft of the motor into the movement of the reversing shaft along its own axis.
[0006] A sealing gasket is provided on one side of the reversing shaft, and the reversing shaft is provided with an overflow channel, which is kept in communication with the drainage channel; the reversing shaft has a first position and a second position under the drive of the transmission module. When the reversing shaft is in the first position, the sealing gasket closes the drainage channel; when the reversing shaft is in the second position, the sealing gasket opens the drainage channel.
[0007] In a preferred embodiment: the transmission module includes a driving gear fixedly connected to the output shaft of the motor and a driven gear meshing with the driving gear; the driven gear is provided with a clearance channel for the reversing shaft to pass through, and the inner wall of the clearance channel is in reversible engagement with the reversing shaft.
[0008] In a preferred embodiment: the sidewall of the reversing shaft and the inner wall of the clearance channel are engaged by a threaded reversing connection.
[0009] In a preferred embodiment: the transmission module includes a screw and a nut, the nut being fixed to the top of the reversing shaft and threadedly engaged with the screw; the screw is fixedly connected to the output shaft of the motor.
[0010] In a preferred embodiment: the transmission module includes a gear and a rack; the rack is fixed to the side wall of the reversing shaft and meshes with the gear, and the gear is fixedly connected to the output shaft of the motor.
[0011] In a preferred embodiment: the transmission module includes a cam and a connecting rod, the cam being driven by a motor and driving the reversing shaft to move along its own axial direction through the connecting rod.
[0012] In a preferred embodiment: it further includes an overflow pipe, which together with the normally open flow channel in the reversing shaft forms the overflow channel; the other side of the reversing shaft contracts radially inward to form a limiting step on the side wall of the reversing shaft; the end face of the overflow pipe abuts against the limiting step to form a limiting fit.
[0013] In a preferred embodiment, the device further includes a lower housing, a body, and a cover arranged sequentially along the axial direction of the reversing shaft; the body and the cover are joined together to form a first chamber for accommodating the motor; the lower housing and the body are joined together to form a second chamber for accommodating the transmission module.
[0014] In a preferred embodiment, the system further includes a control module for transmitting control signals to the motor to control the motor to rotate forward, reverse, or stop.
[0015] In a preferred embodiment: the control module includes a time control unit, which pre-stores the mapping relationship between motor running time and commutator shaft travel.
[0016] In a preferred embodiment, the system further includes a Hall feedback unit, which includes a magnet disposed on the commutation shaft and at least two Hall sensors, the output of which is connected to the control module.
[0017] In a preferred embodiment, a timer is also included, the output of which is connected to the control module.
[0018] This utility model also provides a toilet, wherein the water tank of the toilet is equipped with an electrically controlled drain valve as described above.
[0019] Compared with the prior art, the technical solution of this utility model has the following beneficial effects:
[0020] This invention provides an electrically controlled drain valve that connects to the overflow pipe via a reversing shaft, ensuring the overflow pipe remains always connected to the drain channel. Therefore, even if the drain valve fails, water exceeding the water level in the tank can flow directly into the drain channel through the overflow pipe, preventing the tank from overflowing. Attached Figure Description
[0021] Figure 1This is a schematic diagram of the toilet in a preferred embodiment of the present invention;
[0022] Figure 2 This is a schematic diagram of the drainage of the toilet in a preferred embodiment of the present invention;
[0023] Figure 3 This is a schematic diagram of the installation of the electrically controlled drain valve in the water tank in a preferred embodiment of the present invention;
[0024] Figure 4 This is a cross-sectional view of the electrically controlled drain valve in the water-off state in a preferred embodiment of the present invention;
[0025] Figure 5 This is a cross-sectional view of the electrically controlled drain valve in the draining state in a preferred embodiment of the present invention;
[0026] Figure 6 This is an exploded view of the electrically controlled drain valve in a preferred embodiment of the present invention. Detailed Implementation
[0027] To make the technical solution and features of this utility model clearer, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific examples. It should be understood that these examples are only for illustrating this utility model and are not intended to limit the scope of this utility model. After reading this utility model, any modifications of this utility model by those skilled in the art in various equivalent forms fall within the scope defined by the appended claims.
[0028] refer to Figures 1-6 This embodiment provides a toilet, including a toilet body 1, a water tank 2, and an electrically controlled drain valve 3 disposed in the water tank 2. The function of the electrically controlled drain valve 3 is to open the drain channel, thereby allowing water in the water tank 2 to flow into the toilet body 1 for flushing, and flushing waste into the drain outlet 11 to clean the toilet body 1.
[0029] The electrically controlled drain valve 3 includes: a base 31, a motor 32, a transmission module 33, and a reversing shaft 34; the base 31 is provided with a drain channel 311, the transmission module 33 is connected between the output shaft of the motor 32 and the reversing shaft 34, and cooperates with the reversing shaft 34 to change the rotation of the output shaft of the motor 32 into the movement of the reversing shaft 34 along its own axial direction;
[0030] A sealing gasket 341 is provided on one side of the reversing shaft 34, and an overflow pipe 35 is connected to the other side of the reversing shaft 34. Specifically, the sealing gasket 341 is located on the outside of the reversing shaft 34, while the inside of the reversing shaft 34 has a normally open flow channel 342. Therefore, the overflow pipe 35 can form an overflow channel through this normally open flow channel 342 to maintain communication with the drainage channel 311. No matter where the reversing shaft 34 moves axially, it does not affect the communication between the overflow pipe 35 and the drainage channel 311. The reversing shaft 34 has a first position and a second position under the drive of the driven gear. When the reversing shaft 34 is in the first position, the sealing gasket 341 closes the drainage channel 311; when the reversing shaft 34 is in the second position, the sealing gasket 341 opens the drainage channel 311. By setting the height difference H between the first position and the second position, the flushing speed can be changed, that is, the larger H is, the higher the flushing speed. By setting the residence time T of the reversing shaft 34 in the second position, the drainage volume can be determined.
[0031] In this embodiment, the transmission module 33 includes a driving gear 331 fixedly connected to the output shaft of the motor 32 and a driven gear 332 meshing with the driving gear 331. The driven gear 332 is provided with a clearance channel for the reversing shaft 34 to pass through, and the inner wall of the clearance channel is in a reversible engagement with the reversing shaft 34. The motor 32 drives the driving gear 331 to rotate, and the driving gear 331 drives the driven gear 332 to rotate through the meshing relationship. The driven gear 332 can then drive the reversing shaft 34 to move upward or downward along its own axial direction through the reversible engagement. The direction of movement of the reversing shaft 34 can be controlled by rotating the motor 32 in either the forward or reverse direction.
[0032] To achieve the aforementioned reversing engagement, the side wall of the reversing shaft 34 and the inner wall of the clearance channel are engaged by threads 343 and 3321.
[0033] As a simple alternative to this embodiment, the transmission module 33 may further include a screw and a nut, the nut being fixed to the top of the reversing shaft 34 and threadedly engaged with the screw; the screw being fixedly connected to the output shaft of the motor 32. Alternatively, the transmission module 33 may include a gear and a rack; the rack being fixed to the side wall of the reversing shaft 34 and meshing with the gear, the gear being fixedly connected to the output shaft of the motor 32. Alternatively, the transmission module 33 may include a cam and a connecting rod, the cam being driven by the motor 32 and driving the reversing shaft 34 to move along its own axial direction via the connecting rod.
[0034] To install the overflow pipe 35, the other side of the reversing shaft 34 contracts radially inward to form a limiting step 344 on the side wall of the reversing shaft 34; the end face of the overflow pipe 35 abuts against the limiting step 344 to form a limiting fit.
[0035] Furthermore, the electrically controlled drain valve 3 also includes a lower housing 36, a body 37, and a faceplate 38 arranged sequentially along the axial direction of the reversing shaft 34; the body 37 and the faceplate 38 are assembled to form a first chamber for accommodating the motor 32; the lower housing 36 and the body 37 are assembled to form a second chamber for accommodating the driving gear 331 and the driven gear 332. The signal line 321 of the motor 32 extends out of the first chamber through an opening 381 provided on the faceplate 38, and the signal line 321 is sealed to the opening 381 by a sealing plug 382. The body 37 and the lower housing 36 are fixed together by bolts, and the faceplate 38 and the body 37 are connected by snap-fit.
[0036] In addition, to control the forward, reverse, or stop rotation of the motor 32, the electrically controlled drain valve 3 also includes a control module. The signal output terminal of the control module is connected to the signal line 321 of the motor 32, and the input terminal is connected to a signal input module, which can be a sensor panel, a sensor button, etc. The signal input module and the control module can be connected via wired or wireless means.
[0037] As mentioned above, the height difference H between the first and second positions can be changed by controlling the travel of the reversing shaft 34, thereby altering the flushing speed. Therefore, it is necessary to control the second position of the reversing shaft 34 so that the motor 32 can stop rotating in time when it reaches the preset second position. In this embodiment, the control module includes a time control unit, which stores a mapping relationship between the motor 32's running time and the travel of the reversing shaft 34. Thus, the height of the second position of the reversing shaft 34 can be changed in a pre-set manner.
[0038] As a simple alternative to this embodiment, the second position of the commutator shaft 34 can also be set by setting a Hall feedback unit. Specifically, the Hall feedback unit includes a magnet disposed on the commutator shaft 34 and at least two Hall sensors, the output terminals of which are connected to the control module. When the magnet moves to the position corresponding to one of the Hall sensors, the commutator shaft 34 can be considered to be in the first position; when the magnet moves to the position corresponding to the other Hall sensor, the commutator shaft 34 can be considered to be in the second position.
[0039] The text above also mentions that the drainage volume can be determined by setting the dwell time T of the reversing shaft 34 in the second position. For this purpose, a timer is also required, and the output of the timer is connected to the control module. When the reversing shaft 34 moves to the second position, the timer starts counting. After the preset time is reached, the timer sends a signal to the control module, which then controls the reversing shaft 34 to move to the first position.
[0040] In addition, in this embodiment, the switching shaft 34 and the overflow pipe 35 are two independent parts connected together, or the switching shaft 34 and the overflow pipe 35 can be set as a single part through an integral molding process.
[0041] The above is only one specific embodiment of the present utility model, but the design concept of the present utility model is not limited thereto. Any non-substantial modifications made to the present utility model using this concept shall be deemed as an infringement of the protection scope of the present utility model.
Claims
1. An electrically controlled drain valve, characterized in that... include: Base, motor, transmission module, and reversing shaft; The base is provided with a drainage channel, and the transmission module is connected between the output shaft of the motor and the reversing shaft, and is reverse-cooperative with the reversing shaft to change the rotation of the output shaft of the motor into the movement of the reversing shaft along its own axis. A sealing gasket is provided on one side of the reversing shaft, and the reversing shaft is provided with an overflow channel, which is kept in communication with the drainage channel; the reversing shaft has a first position and a second position under the drive of the transmission module. When the reversing shaft is in the first position, the sealing gasket closes the drainage channel; when the reversing shaft is in the second position, the sealing gasket opens the drainage channel.
2. An electrically controlled drain valve according to claim 1, wherein: The transmission module includes a drive gear fixedly connected to the output shaft of the motor and a driven gear meshing with the drive gear; the driven gear is provided with a clearance channel for the reversing shaft to pass through, and the inner wall of the clearance channel is in reversible engagement with the reversing shaft.
3. An electrically controlled drain valve according to claim 2, wherein: The side wall of the reversing shaft and the inner wall of the clearance channel are connected by a threaded reversing fit.
4. An electrically controlled drain valve according to claim 1, wherein: The transmission module includes a screw and a nut. The nut is fixed to the top of the reversing shaft and is threadedly engaged with the screw. The screw is fixedly connected to the output shaft of the motor.
5. An electrically controlled drain valve according to claim 1, wherein: The transmission module includes a gear and a rack; the rack is fixed to the side wall of the reversing shaft and meshes with the gear, and the gear is fixedly connected to the output shaft of the motor.
6. An electrically controlled drain valve according to claim 1, wherein: The transmission module includes a cam and a connecting rod. The cam is driven by a motor and drives the reversing shaft to move along its own axial direction through the connecting rod.
7. An electrically controlled drain valve according to claim 1, wherein: It also includes an overflow pipe, which together with the normally open flow channel in the reversing shaft forms the overflow channel; the other side of the reversing shaft contracts radially inward to form a limiting step on the side wall of the reversing shaft; the end face of the overflow pipe abuts against the limiting step to form a limiting fit.
8. An electrically controlled drain valve according to claim 1, wherein: It also includes a lower shell, a body, and a cover arranged sequentially along the axial direction of the reversing shaft; the body and the cover are joined together to form a first chamber for accommodating the motor; the lower shell and the body are joined together to form a second chamber for accommodating the transmission module.
9. An electrically controlled drain valve according to claim 1, wherein: It also includes a control module, which is used to transmit control signals to the motor to control the motor to rotate forward, reverse, or stop.
10. An electrically controlled drain valve according to claim 9, wherein: The control module includes a time control unit, which pre-stores the mapping relationship between motor running time and commutator shaft travel.
11. An electrically controlled drain valve according to claim 9, wherein: It also includes a Hall feedback unit, which includes a magnet disposed on the commutation shaft and at least two Hall sensors, the output of which is connected to the control module.
12. An electrically controlled drain valve according to claim 9, wherein: It also includes a timer, the output of which is connected to the control module.
13. A toilet characterized by The toilet tank is equipped with an electrically controlled drain valve as described in any one of claims 1-12.