Intelligent toilet instant heater

Abstract

The utility model belongs to instant heating device technical field, especially point to a kind of intelligent closestool instant heater;Water inlet joint, mounting port, water outlet joint are provided on shell;The water outlet joint is located at the top surface of shell, water inlet temperature sensor and anti-siphon structure are provided on the water outlet joint;The first end of ceramic heating sheet is inserted into the cavity of shell through mounting port, and the second end is installed at mounting port through end cover blocking mounting port;Water outlet seat is connected with water outlet joint, and is provided with water outlet temperature sensor;The controller circuit board is electrically connected with ceramic heating sheet, water inlet temperature sensor, water outlet temperature sensor, and instant heater MCU is vertically installed on the top surface of shell through mounting seat;The anti-siphon structure of the utility model can automatically introduce air when negative pressure is generated in water supply pipeline, destroy vacuum, thereby effectively prevent sewage backflow caused by siphon effect, guarantee the health and safety of water supply system.

Description

Technical Field

[0001] This utility model belongs to the field of instant heating device technology, specifically referring to an intelligent toilet instant heater. Background Technology

[0002] The instant heater in a smart toilet rapidly heats flowing cold water, providing hot water on demand and avoiding the waiting time and bacterial growth issues associated with storage-type heating systems. It has become a standard feature in modern bathroom products. Current technologies for instant heaters in smart toilets primarily focus on structural optimization in areas such as heating efficiency, temperature control accuracy, water circuit sealing reliability, and component fixing methods.

[0003] However, in actual use, when the municipal water supply network experiences a sudden drop in water pressure due to maintenance, pipe bursts, or pump switching, or even negative pressure is generated in the pipes, the heated water in the smart toilet instant water heater and its connecting pipes may be drawn back into the municipal water supply system, causing siphon contamination. This siphon effect can lead to sewage backflow, contaminating the clean water supply network of the entire building and seriously threatening the drinking water hygiene and public health safety of users. Currently, most instant water heater products on the market lack effective protection mechanisms against this type of siphon contamination, posing significant hygiene and safety hazards.

[0004] Therefore, there is an urgent need for a smart toilet instant heater that can automatically prevent sewage backflow when negative pressure occurs in the water supply pipeline, in order to make up for the shortcomings of existing technology. Summary of the Invention

[0005] The purpose of this invention is to provide an intelligent toilet instant heater that can effectively prevent water in the instant heater from being drawn back into the water supply network.

[0006] This utility model is implemented as follows: A smart toilet instant heater includes: The housing is provided with a water inlet connector, an installation port, and a water outlet connector. The water outlet connector is located on the top surface of the housing, and a water inlet temperature sensor is provided on the water outlet connector. A ceramic heating element, wherein the first end of the ceramic heating element extends into the inner cavity of the housing through the mounting port, and the second end is mounted at the mounting port through an end cap, the end cap sealing the mounting port; A water outlet base is connected to the water outlet connector, and a water outlet temperature sensor is provided on the water outlet base; An anti-siphon structure is installed on the water inlet connector; The instant water heater MCU is electrically connected to the ceramic heating element, the inlet water temperature sensor, and the outlet water temperature sensor. The instant water heater MCU is vertically mounted on the top surface of the housing via a mounting bracket.

[0007] In the aforementioned smart toilet instant heater, the inner cavity of the housing is provided with one or more partition plates, which divide the inner cavity of the housing into two or more cavities that are interconnected. The corresponding ceramic heating elements are provided with two or more pieces, which are arranged in parallel and whose first ends extend into the corresponding cavities.

[0008] In the aforementioned smart toilet instant heater, the end cap has a through hole for the ceramic heating element to pass through, and a sealing ring is fitted onto the ceramic heating element. The sealing ring is compressed between the end cap and the mounting port to achieve a seal.

[0009] In the aforementioned smart toilet instant heater, one side of the housing is open, a side sealing plate is provided at the open end, a water inlet connector is formed on the side sealing plate, and the water outlet end of the water inlet connector is connected to the lower cavity.

[0010] In the aforementioned smart toilet instant heater, the anti-siphon structure includes a valve body, a valve seat is provided inside the valve body, and the valve body is connected to a water inlet connector and an air inlet pipe; a valve core is provided inside the valve body, the valve core abuts against the valve seat to seal the air inlet pipe under normal water pressure, and when negative pressure is generated in the water inlet connector, the valve core and the valve seat are spaced apart, allowing external air to enter the water inlet connector through the air inlet pipe.

[0011] In the above-mentioned smart toilet instant heater, a flow meter is connected to the water outlet seat. The flow meter is installed on the mounting base and includes a flow meter housing, an impeller rotatably disposed in the flow meter housing, and a Hall sensor disposed on the flow meter housing. A magnet is disposed on the impeller. The Hall sensor senses the rotation of the impeller and outputs a signal to the instant heater MCU to calculate the water flow.

[0012] In the aforementioned smart toilet instant heater, the mounting base is provided with a contact part that abuts against the outer wall of the flow meter housing, and a mounting post is provided on the opposite side of the contact part. One side of the flow meter housing abuts against the contact part, and the other side is fixed to the mounting post by fasteners.

[0013] In the aforementioned smart toilet instant heater, the instant heater MCU is equipped with a silicon controlled rectifier (SCR), the SCR is mounted on a heat sink, and the heat sink is mounted on the housing.

[0014] In the aforementioned smart toilet instant heater, a self-resetting temperature control switch is provided on the water outlet seat, and the self-resetting temperature control switch is electrically connected to the MCU of the instant heater.

[0015] In the aforementioned smart toilet instant heater, a temperature fuse is installed between the instant heater MCU and the ceramic heating element.

[0016] The outstanding advantages of this utility model compared to the prior art are: 1. The anti-siphon structure of this utility model can automatically introduce air when negative pressure is generated in the water supply pipeline, thereby breaking the vacuum and effectively preventing sewage backflow caused by siphon effect, and ensuring the hygiene and safety of the water supply system.

[0017] 2. This invention uses inlet and outlet water temperature sensors to detect the inlet and outlet water temperatures respectively, and feeds the data back to the instant heater's MCU in real time. The instant heater MCU communicates with the main board, and the main board issues commands to control the instant heater MCU. Based on the set flow rate and real-time flow rate, the control circuit outputs trigger pulses to the SCR, dynamically adjusting its conduction angle to convert the water heating time (flow rate) into power demand, achieving precise adjustment of heating power. Simultaneously, the outlet water temperature sensor detects the water temperature in real time, further adjusting the SCR's conduction angle, also achieving power adjustment. This closed-loop temperature correction further ensures water temperature stability and compensates for errors in flow rate detection or power calculation. By dynamically adjusting the conduction angle, the SCR converts the water heating time (flow rate, temperature) into power demand, achieving precise adjustment of heating power, ultimately ensuring that the instant heater outputs a stable water temperature under different flow rates, effectively avoiding excessively cold or hot water, and improving user comfort and safety.

[0018] 3. The MCU, water outlet seat, and flow meter of this utility model are installed on the mounting base on the top surface of the shell, making full use of the space above the shell. The structure is compact and facilitates the arrangement and installation of this solar collector in the limited installation space of the smart toilet. Attached Figure Description

[0019] Figure 1 This is one of the three-dimensional schematic diagrams of this utility model.

[0020] Figure 2 This is the second three-dimensional schematic diagram of this utility model.

[0021] Figure 3 This is the third three-dimensional schematic diagram of this utility model.

[0022] Figure 4 This is the front view of this utility model.

[0023] Figure 5 yes Figure 4 AA sectional view.

[0024] Figure 6 This is a schematic diagram of the water inlet connector of this utility model installed on the side sealing plate.

[0025] Figure 7 This is a schematic diagram of the casing of this utility model.

[0026] Figure 8This is a schematic diagram of the flow meter of this utility model.

[0027] Figure 9 yes Figure 8 BB cross-sectional view.

[0028] Figure 10 This is a schematic diagram of the mounting base of this utility model.

[0029] In the diagram: 1. Housing; 2. Ceramic heating element; 3. Water outlet base; 4. Water outlet temperature sensor; 5. Water inlet temperature sensor; 6. Instantaneous heater MCU; 7. Water inlet connector; 8. Mounting port; 9. Water outlet connector; 10. End cap; 11. Mounting base; 12. Partition plate; 13. Upper cavity; 14. Lower cavity; 15. Sealing ring; 16. Side sealing plate; 17. Slot; 18. Valve body; 19. Air inlet pipe; 20. Flow meter; 21. Flow meter housing; 22. Impeller; 23. Hall sensor; 24. Abutment part; 25. Mounting post; 26. SCR; 27. Heat sink; 28. Self-resetting temperature control switch; 29. ​​Temperature fuse. Detailed Implementation

[0030] The present invention will be further described below with reference to specific embodiments. See also: Figure 1-10 : This utility model provides an intelligent toilet instant heater, which includes a housing 1, a ceramic heating element 2, a water outlet seat 3, a water outlet temperature sensor 4, a water inlet temperature sensor 5, an anti-siphon structure, and an instant heater MCU 6. The housing 1 is provided with a water inlet connector 7, a mounting port 8, and a water outlet connector 9, with the water outlet connector 9 located on the top surface of the housing 1. The first end of the ceramic heating element 2 extends into the inner cavity of the housing 1 through the mounting port 8, and the second end is mounted at the mounting port 8 through an end cap 10, which seals the mounting port 8. The water inlet end of the water outlet seat 3 is connected to the water outlet connector 9, and the water outlet temperature sensor 4 is disposed on the water outlet seat 8. The water inlet temperature sensor 5 is disposed on the water inlet connector 7. The ceramic heating element 2, the water inlet temperature sensor 5, and the water outlet temperature sensor 4 are all electrically connected to the instant heater MCU 6, which is vertically mounted on the top surface of the housing 1 via a mounting base 11.

[0031] The instantaneous heat collector MCU6 and water outlet seat 3 of this utility model are installed on the top surface of the housing 1, making full use of the space above the housing 1. The structure is compact and is conducive to the installation and arrangement of this heat collector in a small space.

[0032] Furthermore, this invention uses an inlet water temperature sensor 5 and an outlet water temperature sensor 4 to detect the inlet and outlet water temperatures respectively, and feeds the data back to the instant heater MCU6 in real time. The instant heater MCU6 quickly and accurately adjusts the power of the ceramic heating element 2 based on the difference between the set temperature and the real-time detected data, ensuring that the outlet water temperature remains stable at the user's desired set value, effectively preventing the water from being too cold or too hot, and improving user comfort and safety. Specifically: the flow meter detects the real-time flow rate, and the control circuit outputs a trigger pulse to the thyristor to adjust its "conduction angle." The larger the flow rate, the shorter the residence time of the water in the heating element (heating time t); the smaller the flow rate, the longer the heating time t. The control circuit outputs a trigger pulse to the thyristor to adjust its "conduction angle." If high power (large flow rate, short heating time) is required, the conduction angle is increased (allowing more time for AC current to pass through the heating ceramic element), resulting in higher power for the heating element; if low power (small flow rate, long heating time) is required, the conduction angle is decreased (reducing the time for AC current to pass through the heating ceramic element), resulting in lower power for the heating element. Simultaneously, through auxiliary correction of the temperature closed loop, the water temperature is monitored in real time by an outlet water temperature sensor. If the actual water temperature deviates from the target value: if the water temperature is too low → the control circuit increases the conduction angle of the thyristor (increases power); if the water temperature is too high → the control circuit decreases the conduction angle of the thyristor (reduces power). Through this closed-loop correction, water temperature stability is further ensured, compensating for errors in flow detection or power calculation. In summary, the thyristor dynamically adjusts the conduction angle to convert "water heating time (flow rate, temperature)" into "power demand," achieving precise adjustment of heating power and ultimately ensuring that the instant water heater can output a stable water temperature under different flow rates.

[0033] Furthermore, this invention includes a partition plate 12 within the inner cavity of the housing 1, dividing the inner cavity into an upper cavity 13 and a lower cavity 14 that are interconnected. Two ceramic heating elements 2 are provided, arranged parallel to each other, with their first ends extending into the upper cavity 13 and lower cavity 14 respectively, thereby increasing the heat exchange area and improving heating efficiency. Specifically, the partition plate 12 is positioned at a certain distance from the housing 1 at the end near the mounting opening 8, allowing the upper cavity 13 and lower cavity 14 to communicate. The first end of the ceramic heating element 2 is spaced apart from the end of the housing 1 furthest from the mounting opening 8. Water flows downwards through the inlet connector 7 via a siphon device and enters from the lower cavity 14 near the mounting port 8. It then passes over the ceramic heating element 2 located in the lower cavity 14 and the gap between the lower cavity 14 and reaches the upper cavity 13. In the upper cavity 13, the water is reheated by the ceramic heating element 2 and flows out through the outlet connector 9 located near the mounting port 8 in the upper cavity 13. Therefore, the water flow inside the housing 1 is S-shaped and flows from bottom to top, which fundamentally prolongs the flow path and residence time of the water in the inner cavity of the housing 1 and greatly optimizes the heat exchange process between the water and the ceramic heating element 2.

[0034] Furthermore, the ceramic heating element 2 is a single piece. When the area where the smart toilet is located is not much different from the lowest water temperature that the human body can tolerate, but slightly lower, one ceramic heating element 2 can be used to heat the water. In this case, there is no need to set up the partition plate 12. The water flows downward through the water connector 7 via the siphon device, and flows into the lower cavity 14 from the bottom near the installation port 8. It bypasses the heating element 2 and forms a gap with the lower cavity 14 to reach the upper cavity 13, and then flows out from the water outlet connector 9 near the installation port 8. The water flow inside the shell 1 is S-shaped and flows from bottom to top, which fundamentally prolongs the flow path and residence time of the water in the inner cavity of the shell 1, greatly optimizing the heat exchange process between the water and the ceramic heating element 2. It also meets the water heating requirements of people with different tolerances in different temperature areas.

[0035] Furthermore, the ceramic heating element 2 consists of three pieces. When the area where the smart toilet is located differs significantly from the lowest water temperature that the human body can tolerate, and is much lower than the lowest water temperature that the human body can tolerate, three ceramic heating elements 2 can be used to heat the water. A middle partition is added to divide the inner cavity of the shell 1 into an upper cavity, a middle cavity, and a lower cavity 14. Water flows downward through the water connector 7 via a siphon device and enters from the lower cavity 14 near the installation port 8. It bypasses the bottom heating element 2 and forms a gap with the lower cavity 14 to reach the middle cavity (not shown in the figure). In the middle cavity, the water is reheated by the ceramic heating element 2 located in the middle, and then reaches the upper cavity 13 through the gap between the middle cavity and the lower cavity 14. In the upper cavity, the water is reheated by the ceramic heating element 2 located in the upper cavity, and then flows out from the water outlet connector 9 near the installation port 8. The water flow inside the shell 1 is S-shaped and circulates from bottom to top, which fundamentally extends the flow path and residence time of the water in the inner cavity of the shell 1, greatly optimizing the heat exchange process between the water and the ceramic heating element 2. It also meets the water heating requirements of different temperature zones and different tolerance groups.

[0036] Furthermore, the end cap 10 of this utility model has a through hole for the ceramic heating element 2 to pass through, and a sealing ring 15 is fitted on the ceramic heating element 2. The sealing ring 15 is compressed between the end cap 10 and the mounting port 8 to achieve a seal.

[0037] The housing 1 of this invention has an open side, and a side sealing plate 16 is provided at the open end. A water inlet connector 7 is formed on the side sealing plate 16, and the water outlet end of the water inlet connector 7 is connected to the lower cavity 14. The side sealing plate 16 is provided with a slot 17 for inserting the ceramic heating element 2 and the partition plate 12.

[0038] Furthermore, the anti-siphon structure of this utility model includes a valve body 18, within which a valve seat is disposed, and the valve body 18 is connected to a water inlet connector 7 and an air inlet pipe 19; a valve core is disposed within the valve body 18, which, under normal water pressure, abuts against the valve seat to seal the air inlet pipe 19, and when negative pressure is generated in the water inlet connector 7, the valve core and valve seat are spaced apart, allowing external air to enter the water inlet connector 7 through the air inlet pipe 19. The anti-siphon structure can automatically introduce air when negative pressure is generated in the water supply pipeline, breaking the vacuum, thereby effectively preventing sewage backflow caused by the siphon effect.

[0039] To facilitate the calculation of water flow rate, this invention also connects a flow meter 20 to the water outlet 3, specifically, the flow meter 20 is connected to the water outlet end of the water outlet 3. The flow meter 20 is mounted on the mounting base 11, and the flow meter 20 includes a flow meter housing 21, an impeller 22 rotatably disposed within the flow meter housing 21, and a Hall sensor 23 disposed on the flow meter housing 21. A magnet is disposed on the impeller 22, and the Hall sensor 23 senses the rotation of the impeller 22 and outputs a signal to the instant heater MCU6 to calculate the water flow rate.

[0040] Similarly, by mounting the flow meter 20 on the mounting base 11, the space above the housing 1 is utilized, resulting in a more compact structure.

[0041] Furthermore, the mounting base 11 is provided with abutting part 24 that abuts against the outer wall of the flowmeter housing 21, and a mounting post 25 is provided on the opposite side of the abutting part 24. One side of the flowmeter housing 21 abuts against the abutting part 24, and the other side is fixed to the mounting post 25 by fasteners. The abutting part 24 provides a reference positioning for the installation of the flowmeter 20, and together with the mounting post 25, the flowmeter 20 is installed, simplifying the assembly process.

[0042] The instant heater MCU6 of this utility model is provided with a silicon controlled rectifier 26. In order to improve the heat dissipation effect, the silicon controlled rectifier 26 is mounted on a heat sink 27, and the heat sink 27 is mounted on the housing 1.

[0043] To further enhance safety, a self-resetting temperature control switch 28 is installed on the water outlet 3, and the self-resetting temperature control switch 28 is electrically connected to the instant water heater MCU6. When the water temperature exceeds a preset value, the circuit is automatically disconnected to stop heating, preventing scalding caused by excessively high water temperature.

[0044] This invention also includes a temperature fuse 29 between the instant heater MCU6 and the ceramic heating element 2. By melting itself, the fuse forcibly cuts off the power supply, effectively preventing accidents such as combustion and fire caused by overheating, thus improving safety.

[0045] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. A smart toilet instant heater, characterized in that: include: The housing (1) is provided with an inlet connector (7), an installation port (8), and an outlet connector (9). The outlet connector (9) is located on the top surface of the housing (1), and an inlet water temperature sensor (5) is provided on the outlet connector (9). Ceramic heating element (2), the first end of the ceramic heating element (2) extends into the inner cavity of the housing (1) through the mounting port (8), and the second end is installed at the mounting port (8) through the end cap (10), and the end cap (10) blocks the mounting port (8). Water outlet base (3) is connected to the water outlet connector (9), and a water outlet temperature sensor (4) is provided on the water outlet base (3). An anti-siphon structure is installed on the water inlet connector (7); The instant heater MCU (6) is electrically connected to the ceramic heating element (2), the inlet water temperature sensor (5), and the outlet water temperature sensor (4). The instant heater MCU (6) is erected on the top surface of the housing (1) via the mounting base (11).

2. The intelligent toilet instant heater according to claim 1, characterized in that: The inner cavity of the shell (1) is provided with one or more partition plates (12), which divide the inner cavity of the shell (1) into two or more cavities. The two or more cavities are interconnected. The corresponding ceramic heating element (2) is provided with two or more pieces, which are arranged in parallel and their first ends extend into the corresponding cavities.

3. A smart toilet instant heater according to claim 1 or 2, characterized in that: The end cap (10) has a through hole through which the ceramic heating element (2) passes. A sealing ring (15) is fitted on the ceramic heating element (2). The sealing ring (15) is compressed between the end cap (10) and the mounting port (8) to achieve a seal.

4. The intelligent toilet instant heater according to claim 2, characterized in that: The shell (1) has an open side, and a side sealing plate (16) is provided at the open end. A water inlet connector (7) is formed on the side sealing plate (16), and the water outlet end of the water inlet connector (7) is connected to the lower cavity (14).

5. The intelligent toilet instant heater according to claim 1, characterized in that: The anti-siphon structure includes a valve body (18), a valve seat is provided inside the valve body (18), the valve body (18) is connected to the water inlet connector (7) and the air inlet pipe (19); a valve core is provided inside the valve body (18), the valve core abuts against the valve seat to seal the air inlet pipe (19) under normal water pressure, and when negative pressure is generated in the water inlet connector (7), the valve core and the valve seat are spaced apart, so that external air enters the water inlet connector (7) through the air inlet pipe (19).

6. The intelligent toilet instant heater according to claim 1, characterized in that: The outlet end of the water outlet seat (3) is connected to a flow meter (20). The flow meter (20) is installed on the mounting base (11). The flow meter (20) includes a flow meter housing (21), an impeller (22) rotatably disposed in the flow meter housing (21), and a Hall sensor (23) disposed on the flow meter housing (21). A magnet is disposed on the impeller (22). The Hall sensor (23) senses the rotation of the impeller (22) and outputs a signal to the instant heater MCU (6) to calculate the water flow.

7. A smart toilet instant heater according to claim 6, characterized in that: The mounting base (11) is provided with abutting part (24) that abuts against the outer wall of the flow meter housing (21), and a mounting post (25) is provided on the opposite side of the abutting part (24). One side of the flow meter housing (21) abuts against the abutting part (24), and the other side is fixed to the mounting post (25) by fasteners.

8. The intelligent toilet instant heater according to claim 1, characterized in that: The instant heater MCU (6) is provided with a silicon controlled rectifier (26), the silicon controlled rectifier (26) is mounted on a heat sink (27), and the heat sink (27) is mounted on a housing (1).

9. The intelligent toilet instant heater according to claim 1, characterized in that: The water outlet base (3) is equipped with a self-resetting temperature control switch (28), which is electrically connected to the instant heater MCU (6).

10. A smart toilet instant heater according to claim 1, characterized in that: A temperature fuse (29) is provided between the instant heater MCU (6) and the ceramic heating element (2).

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