Flush toilet

By designing separate water sources and controlling valve units, the smart toilet flushing system enables independent washing of the basin and side panels, solving the problems of high water consumption and insufficient cleanliness, thus achieving the effects of water conservation and improved cleanliness.

WO2026130037A1PCT designated stage Publication Date: 2026-06-25LIXIL (CHINA) INVESTMENT CO LTD

Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
LIXIL (CHINA) INVESTMENT CO LTD
Filing Date
2025-11-25
Publication Date
2026-06-25

AI Technical Summary

Technical Problem

Existing smart toilets use a lot of water and have insufficient cleaning ability in the basin, making it impossible to achieve both efficient flushing and water conservation at the same time.

Method used

It adopts a separate water source design, with a water storage tank providing water for the basin and an external water source providing water for the frame. The water circuit control is achieved through a valve unit, which has a high degree of integration and independently controls the rinsing process of the basin and the frame.

Benefits of technology

It enables independent rinsing of the basin and the edge, saving water while improving the cleanliness of the basin, and has a wide range of applications.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN2025137333_25062026_PF_FP_ABST
    Figure CN2025137333_25062026_PF_FP_ABST
Patent Text Reader

Abstract

Provided in the present utility model is a flush toilet, comprising: a toilet seat body, comprising a bowl portion, above which bowl portion a rim portion is provided; a water storage tank configured to provide flushing water for cleaning the bowl portion; and an external water source configured to provide flushing water for cleaning the rim portion. This enables the bowl portion and the rim portion of the toilet seat body not to share the same water source during flushing, thereby improving the cleanliness of the bowl portion while saving water, and providing relatively broad applicability.
Need to check novelty before this filing date? Find Prior Art

Description

flush toilet

[0001] This application claims priority to Chinese Patent Application No. 202423113166.2, filed on December 16, 2024, entitled "Flush Toilet", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This utility model relates to the field of sanitary ware technology, and in particular to a flush toilet. Background Technology

[0003] Currently, the flushing mechanism of smart toilets generally dispenses cleaning water first from the inner edge nozzle (front inner edge cleaning), then dispenses cleaning water from the jet nozzle after the water from the inner edge nozzle is finished, and finally dispenses cleaning water again from the inner edge nozzle after the water from the jet nozzle is finished (rear inner edge cleaning).

[0004] Flushing toilets that use pressurized water for cleaning typically include a pump housed in a tank for storing the cleaning water, and separate discharge pipes that discharge the cleaning water from the pump to the inner edge of the bowl and the jet nozzle of the toilet body. To allow water to be discharged from either the inner edge or the jet nozzle, or simultaneously from both, a valve unit, such as a solenoid diaphragm valve, is installed midway down the discharge pipe from the pump. These flushing toilets generally use a large amount of water and have limited cleaning power for the bowl.

[0005] Therefore, how to improve the flushing capacity of smart toilets while saving water is a technical problem that urgently needs to be solved. Summary of the Invention

[0006] The problem solved by this utility model is to provide a flush toilet that allows the basin and frame of the toilet seat to not share a water source during the flushing process, thereby improving the cleanliness of the basin while saving water, and has a wide range of applications.

[0007] To solve the above problems, this utility model provides a flush toilet, including: a toilet seat body, the toilet seat body including a basin, and a frame portion above the basin; a water storage tank for providing flushing water for cleaning the basin; and an external water source for providing flushing water for cleaning the frame portion.

[0008] Optionally, it also includes a valve unit having a first water inlet connected to the external water source for introducing water from the outside.

[0009] Optionally, the valve unit further has a first water outlet, the frame portion has a first water spray portion, the first water outlet is connected to the first water spray portion through a first pipeline, the valve unit has a first working position, and when the valve unit is in the first working position, the first water outlet is connected to the first water inlet.

[0010] Optionally, the valve unit also has a second outlet, which is connected to the water storage port of the water storage tank through a second pipeline. The valve unit also has a second working position, in which the second outlet is connected to the first inlet when the valve unit is in the second working position.

[0011] Optionally, the valve unit also has a second water inlet, which is connected to the water outlet of the water storage tank via a third pipeline.

[0012] Optionally, the valve unit also has a third water outlet, the basin has a second water spray section, the third water outlet is connected to the second water inlet, the third water outlet is connected to the second water spray section through a fourth pipeline, and the valve unit also has a third working position, when the valve unit is in the third working position, the third water outlet is connected to the second water inlet.

[0013] Optionally, it also includes a booster pump, which includes a booster inlet and a booster outlet. The third pipeline includes a first sub-pipeline and a second sub-pipeline. One end of the first sub-pipeline is connected to the outlet of the water storage tank, and the other end of the first sub-pipeline is connected to the booster inlet. One end of the booster outlet is connected to one end of the second sub-pipeline, and the other end of the second sub-pipeline is connected to the second inlet.

[0014] Optionally, it also includes: a control unit, which controls the valve unit to perform cleaning of the frame portion by the external water source, and / or to perform cleaning of the basin portion by the rinsing water in the water storage tank.

[0015] Optionally, the valve unit is further provided with an inflow prevention unit, which prevents flushing water from the booster pump from flowing into the outside of the basin and prevents flushing water from the external water source from flowing into the outside of the frame.

[0016] Compared with the prior art, the technical solution of this utility model has the following advantages:

[0017] In the technical solution of this utility model flush toilet, the toilet seat body includes a basin and a frame portion located above the basin. The water in the water tank is used to provide flushing water for cleaning the basin, and the external water source is used to provide flushing water for cleaning the frame portion. This separates the flushing water for the basin and the flushing water for the frame portion, which can save water on the one hand and improve the cleanliness of the basin on the other hand, and has a wide range of applications.

[0018] Furthermore, it also includes a valve unit, which has a first water inlet connected to the external water source for introducing external water. The valve unit has a first water outlet connected to the frame, a second water outlet connected to the water storage tank, and a third water outlet connected to the basin. The first water outlet is used to provide rinsing water for rinsing the frame, the second water outlet is used to add water to the water storage tank, and the third water outlet is used to provide rinsing water for rinsing the basin. This "one inlet and three outlets" valve unit has a high degree of integration, greatly reduces the space area, and has a wide range of applications. Attached Figure Description

[0019] Figure 1 is a top view of the toilet seat body in one embodiment of the present invention;

[0020] Figure 2 is an internal structural diagram of a flush toilet according to an embodiment of the present invention;

[0021] Figure 3 is an integrated structural diagram of the valve unit, water storage tank and booster pump in one embodiment of this utility model;

[0022] Figure 4 is a schematic diagram of the valve unit in one embodiment of the present invention;

[0023] Figure 5 is a structural schematic diagram of Figure 4 from another angle. Detailed Implementation

[0024] Currently, in the flushing process of flush toilets, the basin of the toilet seat and the frame above the basin are supplied with flushing water through the same water source. This type of flush toilet has the problem of large water consumption, and the cleanliness of the basin needs to be improved. At the same time, the integration of flush toilets also needs to be improved.

[0025] Through research, the inventors discovered that the toilet seat body includes a basin and a frame above the basin. The water in the water tank is used to provide rinsing water for cleaning the basin, while the external water source is used to provide rinsing water for cleaning the frame. This separates the rinsing water for the basin and the rinsing water for the frame, which can save water on the one hand and improve the cleanliness of the basin on the other, and has a wide range of applications.

[0026] The inventors further discovered through research that the valve unit has a first water inlet, which is connected to the external water source to bring in external water. The valve unit also has a first water outlet connected to the frame, a second water outlet connected to the water storage tank, and a third water outlet connected to the basin. The first water outlet is used to provide rinsing water for rinsing the frame, the second water outlet is used to add water to the water storage tank, and the third water outlet is used to provide rinsing water for rinsing the basin. This "one inlet and three outlets" valve unit has a high degree of integration, greatly reduces the space required, and has a wide range of applications.

[0027] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0028] Figure 1 is a top view of the toilet seat body in one embodiment of the present invention; Figure 2 is an internal structural diagram of the flushing toilet in one embodiment of the present invention; Figure 3 is an integrated structural diagram of the valve unit, water tank and booster pump in one embodiment of the present invention; Figure 4 is a structural schematic diagram of the valve unit in one embodiment of the present invention; Figure 5 is a structural schematic diagram of Figure 4 from another angle.

[0029] First, please refer to Figure 1. The flush toilet includes: the toilet seat body 101, which includes the basin part 101a and the frame part 101b.

[0030] In this embodiment, the frame portion 101b is located above the basin portion 101a.

[0031] In this embodiment, the toilet seat body 101 is made of ceramic.

[0032] In this embodiment, the basin 101a is used to receive waste, and the bottom of the basin has an extending drain bend (not shown in the figure). The basin 101a has a second water spray section (not marked in the figure). The second water spray section is formed at the bottom of the basin 101a and is arranged substantially horizontally pointing towards the inlet of the drain bend, and is configured to spray flushing water toward the drain bend.

[0033] In this embodiment, the frame portion 101b is located at the upper edge of the toilet seat body 101 and above the basin portion 101a. The frame portion 101b has a first water spray portion (not marked in the figure). The first water spray portion is formed on the upper side of the basin portion 101a and is configured to spray flushing water along the edge of the basin portion 101a.

[0034] Referring to Figures 2 to 5, the flush toilet also includes the water storage tank 102.

[0035] In this embodiment, the water tank 102 is used to provide rinsing water for cleaning the basin 101a.

[0036] In this embodiment, an external water source is also included to provide rinsing water for cleaning the frame portion 101b.

[0037] In this embodiment, a valve unit 200 is also included. The valve unit 200 has a first water inlet 200a, which is connected to the external water source and is used to introduce the external water source. The valve unit 200 has a first water outlet 200b connected to the frame portion 101b, a second water outlet 200c connected to the water storage tank 102, and a third water outlet 200d connected to the basin portion 101a. The first water outlet 200b is used to provide rinsing water for rinsing the frame portion 101b, the second water outlet 200c is used to add water to the water storage tank 102, and the third water outlet 200d is used to provide rinsing water for rinsing the basin portion 101a.

[0038] In this embodiment, the "one-in-three-out" valve unit 200 has a high degree of integration, greatly reduces the space area, and has a wide range of applications.

[0039] Please refer to Figures 3 to 5. Specifically, the first water outlet 200b is connected to the first water spray unit through the first pipe 103. One end of the first pipe 103 is connected to the first water outlet 200b, and the other end 104 is connected to the first water spray unit. This is used to provide rinsing water for cleaning the frame part 101b. The valve unit 200 has a first working position. When the valve unit 200 is in the first working position, the first water outlet 200b is connected to the first water inlet 200a.

[0040] In addition, the second outlet 200c is connected to the water storage port of the water storage tank 102 through a second pipeline (not shown in the figure). The valve unit 200 also has a second working position. When the valve unit 200 is in the second working position, the second outlet 200c is connected to the first inlet 200a.

[0041] In this embodiment, the valve unit 200 also has a second inlet 200e, one end of which is connected to the outlet of the water storage tank 102 through a third pipeline 105, and the other end of which is connected to the third outlet 200d.

[0042] In this embodiment, the third water outlet 200d is connected to the second water spray section through the fourth pipe 106, wherein one end 107 of the fourth pipe is connected to the second water spray section to provide rinsing water for cleaning the basin 101a. The valve unit 200 also has a third working position. When the valve unit 200 is in the third working position, the third water outlet 200d is connected to the second water inlet 200e.

[0043] In this embodiment, referring to Figure 3, a booster pump 201 is also included. The booster pump 201 includes a booster inlet 201a and a booster outlet 201b. The third pipeline 105 includes a first sub-pipeline 105a and a second sub-pipeline 105b. One end of the first sub-pipeline 105a is connected to the outlet of the water storage tank 102, and the other end of the first sub-pipeline 105a is connected to the booster inlet 201a. One end of the booster outlet 201b is connected to one end of the second sub-pipeline 105b, and the other end of the second sub-pipeline 105b is connected to the second inlet 200e.

[0044] In this embodiment, the water storage tank 102 is configured to store flushing water that should be discharged from the booster pump 201 and from the second spray section, that is, the booster pump 201 pressurizes the flushing water in the water storage tank 102.

[0045] In this embodiment, the rinsing water used to rinse the frame portion 101b does not pass through the booster pump 201.

[0046] In this embodiment, the flushing water in the water storage tank 102 is pressurized by the booster pump 201 and enters the second inlet 200e. When the valve unit 200 is in the third working position, the third outlet 200d is connected to the second inlet 200e. The flushing water from the second inlet 200e flows to the third outlet 200d and is supplied to the second spray unit through one end 107 of the fourth pipe 106 to flush the basin 101a. Meanwhile, external water enters from the first outlet 200b and is supplied to the first spray unit through the first pipe 103 to flush the frame 101b. This flushing toilet separates the flushing water for the basin 101a and the frame 101b, which saves water and improves the cleanliness of the basin, and has a wide range of applications.

[0047] In this embodiment, it also includes a control unit (not marked in the figure), which controls the valve unit 200 to perform cleaning of the frame portion 101b by the external water source and / or to perform cleaning of the basin portion 101a by the rinsing water in the water storage tank 102.

[0048] In this embodiment, the valve unit 200 is also provided with an inflow prevention unit (not marked in the figure), which prevents the flushing water from the booster pump 201 from flowing into the basin 101a and prevents the flushing water from the external water source from flowing into the frame 101b.

[0049] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A flushing toilet, characterized in that, include: A toilet seat body, the toilet seat body including a basin, and a frame portion above the basin; A water tank is provided for rinsing water for cleaning the basin. An external water source is used to provide rinsing water for cleaning the frame portion.

2. The flush toilet as described in claim 1, characterized in that, It also includes a valve unit having a first water inlet connected to the external water source for introducing water from the outside.

3. The flushing toilet as described in claim 2, characterized in that, The valve unit also has a first water outlet, and the frame portion has a first water spray portion. The first water outlet is connected to the first water spray portion through a first pipeline. The valve unit has a first working position. When the valve unit is in the first working position, the first water outlet is connected to the first water inlet.

4. The flushing toilet as described in claim 2, characterized in that, The valve unit also has a second outlet, which is connected to the water storage port of the water storage tank through a second pipeline. The valve unit also has a second working position, in which the second outlet is connected to the first inlet when the valve unit is in the second working position.

5. The flushing toilet as described in claim 4, characterized in that, The valve unit also has a second water inlet, which is connected to the water outlet of the water storage tank via a third pipeline.

6. The flushing toilet as described in claim 5, characterized in that, The valve unit also has a third water outlet, the basin has a second water spray section, the third water outlet is connected to the second water inlet, the third water outlet is connected to the second water spray section through a fourth pipe, and the valve unit also has a third working position, when the valve unit is in the third working position, the third water outlet is connected to the second water inlet.

7. The flushing toilet as described in claim 5, characterized in that, It also includes a booster pump, which includes a booster inlet and a booster outlet. The third pipeline includes a first sub-pipeline and a second sub-pipeline. One end of the first sub-pipeline is connected to the outlet of the water storage tank, and the other end of the first sub-pipeline is connected to the booster inlet. One end of the booster outlet is connected to one end of the second sub-pipeline, and the other end of the second sub-pipeline is connected to the second inlet.

8. The flushing toilet as described in claim 7, characterized in that, Also includes: The control unit controls the valve unit to perform the cleaning of the frame portion by the external water source and / or to perform the cleaning of the basin portion by the rinsing water in the water storage tank.

9. The flushing toilet as described in claim 8, characterized in that, The valve unit is also provided with an inflow prevention unit, which prevents flushing water from the booster pump from flowing into the outside of the basin and prevents flushing water from the external water source from flowing into the outside of the frame.