Universal sensing flush valve for concealed water tank

Abstract

The utility model discloses a universal sensing flush valve for a concealed water tank. The flush valve comprises a water tank, a pre-buried tank, a water outlet pipe, a closestool, a drain valve and a sensing device, the water tank and the pre-embedded tank are installed in a wall-embedded mode, the pre-embedded tank is installed below the water tank, a water outlet pipe communicated with the interior of the water tank is arranged at the bottom of the water tank, and the water outlet pipe penetrates through the pre-embedded tank to be connected with the closestool; a drainage valve is arranged in the pre-buried box, the drainage valve is installed on the water outlet pipe to control connection and disconnection between the water outlet pipe and the water tank, an induction window is formed in the surface of the pre-buried box, and the induction device is installed in the induction window and is in signal connection with the drainage valve; according to the utility model, a double-box installation mode that the water tank and the embedded box are arranged in a split manner is adopted, and the embedded box is installed below the water tank, so that the installation height of the induction panel is reduced to a moderate middle-low position, and the experience feeling of a user is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of bathrooms, and in particular relates to a universal induction concealed water tank flush valve. Background Art

[0002] Currently, most flush valves in public toilets on the market are electromagnetic flush valves, and multiple electromagnetic flush valves are installed side by side with a very high installation density. The internal water channels are connected in parallel. When multiple flush valves are installed side by side, it is often necessary to start the flush valves at the same time. Because the flow rate of the flush valve is large, the simultaneous operation of two or more flush valves will cause a sudden drop in water pressure in the water channel, and the water flow rate will instantly decrease, making it impossible to flush thoroughly.

[0003] In addition, there are also induction flush valves with water tanks on the market, such as patent CN206503199U. The water tank of this type of flush valve is generally installed in a hidden wall-mounted manner. A pre-buried box is provided on the top of the water tank. The pre-buried box and the water tank are integrated. The induction control module is set in the pre-buried box. The surface of the pre-buried box is provided with an induction window, and the induction panel is set in the induction window. If this type of induction water tank flush valve is used, in order to ensure that the water tank has sufficient flushing force on the toilet when draining, the water tank needs to be installed at a high position. In order to avoid being soaked by water, the induction device needs to be installed on the top of the water tank. As a result, the installation height of the induction panel will be relatively high, generally at a position of 60-80 cm from the ground. The induction device often cannot be triggered normally by the user, and the user experience is extremely poor. In addition, the drain valve, water inlet valve, overflow pipe and other structures are all set inside the water tank. The space inside the water tank is crowded and narrow, making it inconvenient to disassemble and maintain. Utility Model Content

[0004] The purpose of this utility model is to provide a universal induction concealed water tank flush valve, which adopts a double-box installation method in which the water tank and the embedded box are separately installed. The embedded box is installed below the water tank, thereby lowering the installation height of the induction panel to a moderate medium-low position, thereby improving the user experience.

[0005] To achieve the above-mentioned purpose, the solution of the present invention is: a universal induction concealed water tank flush valve, comprising a water tank, an embedded box, an outlet pipe, a toilet, a drain valve, and a sensing device; the water tank and the embedded box are both embedded in the wall, the embedded box is installed below the water tank, the bottom of the water tank is provided with an outlet pipe connected to the interior thereof, the outlet pipe passes through the embedded box and is connected to the toilet; a drain valve is provided inside the embedded box, the drain valve is installed on the outlet pipe to control the connection between the outlet pipe and the water tank, a sensing window is provided on the surface of the embedded box, the sensing device is installed in the sensing window and is connected to the drain valve signal.

[0006] Furthermore, the water outlet pipe includes a first fixed pipe, an adjusting pipe and a second fixed pipe from top to bottom, the water inlet of the drain valve is detachably connected to the bottom of the water tank, the water outlet of the drain valve is detachably connected to the top of the first fixed pipe, the two ends of the adjusting pipe are movably connected to the bottom end of the first fixed pipe and the top end of the second fixed pipe respectively, the embedded box is connected to the adjusting pipe and moves up and down with the adjusting pipe, and the bottom end of the second fixed pipe is connected to the toilet.

[0007] Furthermore, both ends of the regulating tube are movably connected to the first fixed tube and the second fixed tube respectively through sealing rings.

[0008] Furthermore, a water inlet valve and an overflow pipe can be detachably installed inside the embedded box. The water inlet valve is connected to the bottom of the water tank, the top of the overflow pipe extends into the water tank, and the bottom of the overflow pipe is connected to the water outlet pipe.

[0009] Furthermore, the bottom of the water tank is provided with a first connecting pipe, a second connecting pipe, and a third connecting pipe extending into the interior of the embedded box, the water inlet valve is detachably connected to the first connecting pipe, the water inlet and water outlet of the drain valve are detachably connected to the second connecting pipe and the water outlet pipe respectively, and the top of the overflow pipe passes through the third connecting pipe to extend into the water tank.

[0010] Furthermore, the water inlet valve is detachably installed in the first connecting pipe through a union nut, the water inlet and water outlet of the drain valve are detachably connected to the second connecting pipe and the water outlet pipe respectively through a union nut, and the top and bottom of the overflow pipe are respectively connected to the third connecting pipe and the water outlet pipe through a union nut.

[0011] Furthermore, the water inlet valve includes a water inlet valve body, a first diaphragm, a plug, a float and a telescopic rod. The water inlet valve body is detachably mounted on the bottom of the water tank. A water inlet channel and a water outlet channel are provided inside the water inlet valve body. The water outlet channel communicates with the interior of the water tank. A first water outlet is provided on the top of the water inlet channel, communicating with the water outlet channel. The first diaphragm is disposed above the first water outlet to open and close the first water outlet.

[0012] The water inlet valve body is provided with a first pressure relief channel above the first diaphragm, and a first pressure relief hole is provided on the top of the first pressure relief channel. The plug is movably arranged in the first pressure relief channel to open and close the first pressure relief hole, and a first back pressure chamber connected to the first pressure relief channel is formed between the plug and the diaphragm; the telescopic rod is vertically arranged inside the water tank, and the top and bottom of the telescopic rod are respectively connected to the float and the plug.

[0013] Furthermore, the telescopic rod includes an inner rod and an outer rod, the bottom of the outer rod is connected to a plug, the interior of the outer rod is hollow, the bottom of the inner rod is movably arranged inside the outer rod, and the bottom of the inner rod is provided with a locking structure for locking or unlocking with the outer rod, and the top of the inner rod is connected to a float.

[0014] Furthermore, the drain valve includes a drain valve body, a second diaphragm, a pressure relief seat, and a solenoid valve. A water inlet and a water outlet are opened at both ends of the drain valve body. A second water outlet connecting the water inlet and the water outlet is provided inside the drain valve body. The second diaphragm is arranged above the second water outlet to open and close the second water outlet. The pressure relief seat is arranged above the second diaphragm and forms a second back pressure cavity between the pressure relief seat and the second diaphragm. A second pressure relief channel connected to the second back pressure cavity is provided on the pressure relief seat. The valve head of the solenoid valve is used to open and close the second pressure relief channel. The sensing device is connected to the solenoid valve signal.

[0015] Furthermore, the sensing device includes a sensing panel and a sensing control module. The sensing panel is detachably installed in the sensing window to expose the wall surface. The sensing control module is arranged on the inner side of the sensing panel and is connected to the solenoid valve signal.

[0016] After adopting the above solution, the beneficial effects of the utility model are:

[0017] First of all, the utility model is a double-box installation structure in which the water tank and the embedded box are separately arranged, which is equivalent to separating the embedded box on the top of the existing hidden water tank into an independent box structure, and then installing the embedded box under the water tank, and opening a sensing window on the surface of the embedded box, and the sensing device is arranged in the sensing window, so that the sensing device can be installed in a moderate medium and low position, which is convenient for users to trigger the sensing device and improve the user experience. Moreover, the water tank is still installed at a high position, which will not affect the flushing force of the water tank drainage. In addition, the sensing device is installed on the embedded box and will not come into contact with the water inside the water tank, thereby avoiding damage due to water and extending the service life.

[0018] Secondly, the embedded box is not fixed to the water tank, and the installation height of the embedded box is adjustable, so that the height of the sensing device can be adjusted as needed to meet different user needs.

[0019] Finally, structures such as the drain valve, water inlet valve and overflow pipe can be disassembled and installed inside the embedded box, rather than being crowded together inside the water tank. The space inside the embedded box is larger, and disassembly and maintenance are convenient through the sensing window. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is an exploded view of the parts of the present utility model;

[0022] Figure 3 It is a cross-sectional view of the utility model;

[0023] Figure 4 For this utility model Figure 3 A partial enlarged view of the middle part;

[0024] Figure 5 For this utility model Figure 3 A partial enlarged view of point B in the middle;

[0025] Figure 6 For this utility model Figure 3 A partial enlarged view of point C in the middle;

[0026] Figure 7 This is an exploded view of the parts of the water inlet valve of the utility model;

[0027] Figure 8 This is an exploded view of the parts of the drain valve of the utility model;

[0028] Figure 9 This is an exploded view of the parts of the sensing device of the present invention.

[0029] Description of labels:

[0030] 1. Water tank; 11. First connecting pipe; 12. Second connecting pipe; 13. Third connecting pipe; 14. Switch valve; 15. Water inlet pipe; 16. Mounting ear plate; 161. Vertical slot; 2. Embedded box; 21. Sensor window; 22. Mounting hole; 23. Overflow pipe; 3. Water outlet pipe; 31. First fixed pipe; 32. Regulating pipe; 33. Second fixed pipe; 4. Toilet; 5. Drain valve; 51. Water inlet; 52. Water outlet; 53. Drain valve body; 531. Second water outlet; 532. Second pressure relief channel; 533. Second pressure relief hole; 534. Upper cover; 535. Seat body; 536. Second back pressure chamber; 54. Second diaphragm; 55. Pressure relief seat; 56. Electric Magnetic valve; 57, second spring; 58, second ejector pin; 6, sensing device; 61, sensing panel; 611, panel body; 612, panel bracket; 62, sensing control module; 7, water inlet valve; 71, water inlet valve body; 711, water inlet channel; 712, water outlet channel; 713, first water outlet; 714, first pressure relief channel; 715, first pressure relief hole; 716, first back pressure chamber; 72, first diaphragm; 73, plug; 74, float; 75, telescopic rod; 751, inner rod; 752, outer rod; 753, elastic sphere; 76, first spring; 77, first ejector pin; 78, diaphragm seat; 8, union nut; 81, flange; 9, mounting plate. DETAILED DESCRIPTION

[0031] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] like Figure 1-9As shown, the utility model provides a universal induction concealed water tank flush valve, comprising a water tank 1, an embedded box 2, a water outlet pipe 3, a toilet 4, a drain valve 5, and a sensing device 6; the water tank 1 and the embedded box 2 are both embedded in the wall, the embedded box 2 is installed below the water tank 1, specifically installed side by side with the water tank 1, the bottom of the water tank 1 is provided with a water outlet pipe 3 connected to the interior thereof, the water outlet pipe 3 passes through the embedded box 2 and is connected to the toilet 4, the water in the water tank 1 flows into the toilet 4 through the water outlet pipe 3 to flush the toilet 4, and the toilet 4 can be a sitting type or a squatting type toilet 4; this structure in which the water tank 1 and the embedded box 2 are installed side by side up and down, and the water outlet pipe 3 passes through the embedded box 2 can reduce the thickness of the embedded wall. In addition, the drain valve 5 is arranged inside the embedded box 2, and the drain valve 5 is specifically installed on the water outlet pipe 3 to control the connection between the water outlet pipe 3 and the water tank 1. A sensing window 21 is opened on the surface of the embedded box 2, and the sensing device 6 is installed in the sensing window 21 and connected to the drain valve 5 signal. The sensing device 6 is exposed to the wall. The user can trigger the sensing device 6 after defecation. The sensing device 6 controls the drain valve 5 to open and flush the toilet 4. After the flushing is completed, the drain valve 5 is controlled to close, thereby realizing the induction-controlled flushing of the toilet 4.

[0033] The present invention is a dual-box installation structure in which the water tank 1 and the embedded box 2 are separately installed. This is equivalent to separating the embedded box on the top of the existing hidden water tank 1 into an independent box structure, and then installing the embedded box 2 below the water tank 1, so that the sensing device 6 can be installed in a moderate medium-low position. The sensing device 6 can be specifically installed at a position about 40 cm from the ground, which is convenient for the user to trigger the sensing device 6 and improve the user experience. In addition, the water tank 1 is still installed at a high position, specifically at a position 60-80 cm from the ground, preferably at a position 70-80 cm from the ground. When the water tank 1 is drained, it has sufficient flushing force on the toilet 4. In addition, the sensing device 6 is installed on the embedded box 2 and will not come into contact with the water inside the water tank 1, avoiding damage due to water contact and extending the service life.

[0034] Key references Figure 2 and 3 The drain valve 5 can be detachably installed in the embedded box 2, and the sensing device 6 can be detachably installed in the sensing window 21. The drain valve 5 can be conveniently disassembled and maintained through the sensing window 21. In addition to the drain valve 5, the water inlet valve 7 and the overflow pipe 23 can also be detachably installed in the embedded box 2, that is, all water parts inside the existing water tank 1 can be detachably installed in the embedded box 2. The space inside the embedded box 2 is large, which is convenient for the staff's subsequent maintenance work. Among them, the water inlet valve 7 is connected to the bottom of the water tank 1. The water inlet valve 7 is a lower water inlet valve 7, which can fill the water tank 1 from bottom to top. The top of the overflow pipe 23 extends into the interior of the water tank 1, and the bottom of the overflow pipe 23 is connected to the outlet pipe 3. When the water level inside the water tank 1 is too high due to damage to the water inlet valve 7, water will flow from the overflow pipe 23 to the outlet pipe 3, and then flow into the toilet 4.

[0035] Specifically, the bottom of the water tank 1 is provided with a first connecting pipe 11, a second connecting pipe 12, and a third connecting pipe 13 extending to the interior of the embedded box 2. The water inlet valve 7, the drain valve 5 and the overflow pipe 23 are connected to the water tank 1 through the first connecting pipe 11, the second connecting pipe 12 and the second connecting pipe 12, wherein the water inlet valve 7 is detachably connected to the first connecting pipe 11, and the water inlet 51 and the water outlet 52 of the drain valve 5 are detachably connected to the second connecting pipe 12 and the water outlet pipe 3 respectively. The top of the overflow pipe 23 passes through the third connecting pipe 13 to extend into the water tank 1, and a sealing ring is provided between the overflow pipe 23 and the third connecting pipe 13 to prevent water leakage.

[0036] Preferably, Figure 3-6 As shown, the water inlet valve 7 and the first connecting pipe 11 are detachably connected via a union nut 8, and a circle of flanges 81 are provided on the inner periphery of the bottom of the union nut 8. A circle of bosses are provided on the outer periphery of the middle portion of the water inlet valve body 71 of the water inlet valve 7. The water inlet valve body 71 is installed in the first connecting pipe 11, and the union nut 8 is threadedly connected to the outer periphery of the bottom of the first connecting pipe 11, so that the boss of the water inlet valve body 71 is abutted between the first connecting pipe 11 and the flange 81 of the union nut 8. The bottom of the water inlet valve body 71 is also detachably connected to a water inlet pipe 15 via the union nut 8 according to the same principle. The union nut 8 is threadedly connected to the bottom of the water inlet valve body 71, and the outer periphery of the water inlet pipe 15 is provided with a boss abutted between the flange 81 and the water inlet valve body 71. The water inlet valve 7 can be disassembled by loosening the union nut 8. Similarly, the drain valve 5 also uses a union nut 8 to detachably connect the second connecting pipe 12 and the outlet pipe 3. The connection method is the same as that of the inlet valve 7 and will not be described in detail here. It should be noted that the overflow pipe 23 can also use a union nut 8 to connect the third connecting pipe 13 and the outlet pipe 3. However, the union nut 8 is threadedly connected to the third connecting pipe 13 and the outlet pipe 3, and the sealing ring is abutted between the flange 81 and the third connecting pipe 13 or the outlet pipe 3. The union nut 8 prevents the sealing ring from dislodging and also facilitates the removal and installation of the overflow pipe 23.

[0037] Furthermore, the first connecting pipe 11, the second connecting pipe 12, and the third connecting pipe 13 are arranged side by side horizontally, so that the water inlet valve 7, the drain valve 5, and the overflow pipe 23 are arranged side by side in the embedded box 2, and the drain valve 5 is directly opposite the sensing window 21. The water inlet valve 7 and the overflow pipe 23 are respectively located on both sides of the drain valve 5. The layout is reasonable and convenient for staff to disassemble and maintain. In addition, the top wall of the embedded box 2 is provided with a mounting hole 22 for the first connecting pipe 11, the second connecting pipe 12, and the third connecting pipe 13 to pass through. The mounting hole 22 extends to the rear side wall of the embedded box 2. Before the embedded wall is installed, the water inlet valve 7, the drain valve 5, and the overflow pipe 23 can be easily installed through the mounting hole, and whether they are installed in place can be checked.

[0038] Key references Figure 3The outlet pipe 3 includes a first fixed pipe 31, an adjusting pipe 32 and a second fixed pipe 33 from top to bottom. The water inlet 51 of the drain valve 5 is detachably connected to the bottom of the water tank 1, that is, it is detachably connected to the second connecting pipe 12. The water outlet 52 of the drain valve 5 is detachably connected to the top of the first fixed pipe 31. The two ends of the adjusting pipe 32 are movably connected to the bottom end of the first fixed pipe 31 and the top end of the second fixed pipe 33 respectively. The bottom end of the second fixed pipe 33 is connected to the toilet 4. The first fixed pipe 31 and the second fixed pipe 33 are fixed. The adjusting pipe 32 can move up and down relative to the first fixed pipe 31 and the second fixed pipe 33. The embedded box 2 is connected to the adjusting pipe 32 and can move up and down with the adjusting pipe 32. Therefore, the height of the embedded box 2 can be adjusted by moving the adjusting pipe 32 to meet the requirements of different installation heights.

[0039] Specifically, the ends of the adjustment tube 32 are movably connected to the first fixed tube 31 and the second fixed tube 33 via sealing rings. The sealing rings are sealed to the inner or outer walls of the first and second fixed tubes 31 and 33. Due to the sealing fit of the sealing rings, the adjustment tube 32 is fixed in a normal state. Applying force to the adjustment tube 32 pulls it up and down to adjust the height of the embedded box 2. In addition to the sealing rings, the adjustment tube 32 can also be movably connected to the first and second fixed tubes 31 and 33 through other structures.

[0040] Preferably, the second fixed pipe 33 is located below the embedded box 2, and the bottom end of the regulating pipe 32 passes through the bottom wall of the embedded box 2. The bottom wall of the embedded box 2 is connected to the middle of the regulating pipe 32. Specifically, it can be integrally connected and fixed to the regulating pipe 32, or it can be connected separately. The connection method is not limited. Connecting the bottom wall of the embedded box 2 to the middle of the regulating pipe 32 not only facilitates connection with the regulating pipe 32, but also does not occupy space inside the embedded box 2.

[0041] Furthermore, a switch valve 14 is provided at the bottom of the embedded box 2. The water inlet valve 7 is connected to the switch valve 14 via a water inlet pipe 15. The switch valve 14 is connected to a natural water pipe to supply water to the water inlet valve 7. When disassembling and repairing, the staff first closes the switch valve 14 to cut off the water supply to the water inlet valve 7, and then performs maintenance on the water inlet valve 7. The water inlet pipe 15 is a hose structure. When the embedded box 2 is moved up and down to adjust the height, the water inlet pipe 15 will bend or straighten to accommodate.

[0042] Key references Figure 3 、 Figure 4 and Figure 7The water inlet valve 7 includes a water inlet valve body 71, a first diaphragm 72, a plug 73, a float 74, and a telescopic rod 75. The water inlet valve body 71 is detachably mounted on the bottom of the water tank 1, that is, mounted in the first connecting pipe 11. The interior of the water inlet valve body 71 is provided with an inlet channel 711 and a water outlet channel 712. The inlet channel 711 is located at the lower portion of the water inlet valve body 71. The exterior of the water inlet valve body 71 extends out of the first connecting pipe 11 and connects to the water inlet pipe 15, allowing water to flow through the inlet channel 711. The outlet channel 712 is located at the upper portion of the water inlet valve body 71 to communicate with the interior of the water tank 1. The top of the water inlet channel 711 is provided with a first water outlet 713 that communicates with the outlet channel 712. The first diaphragm 72 is disposed above the first water outlet 713 to open and close the first water outlet 713. The water inlet valve body 71 is provided with a first pressure relief channel 714 above the first diaphragm 72, and a first pressure relief hole 715 is provided on the top of the first pressure relief channel 714. The plug 73 is movably arranged in the first pressure relief channel 714 to open and close the first pressure relief hole 715. A first back pressure chamber 716 connected to the first pressure relief channel 714 is formed between the plug 73 and the diaphragm. A first spring 76 is provided in the first back pressure chamber 716. When the first diaphragm 72 blocks the water outlet 52, the first spring 76 is in a stretched reset state. A first ejector pin 77 is provided in the middle of the first spring 76, and a first water supply hole for the ejector pin to pass through is provided on the first diaphragm 72; the telescopic rod 75 is vertically arranged inside the water tank 1, and the top and bottom of the telescopic rod 75 are respectively connected to the float 74 and the plug 73.

[0043] The working principle of the water inlet valve 7 is as follows: when the water level drops due to drainage of the water tank 1, the float 74 falls due to gravity, and at the same time drives the telescopic rod 75 and the plug 73 to drop until the plug 73 opens the first pressure relief hole 715, and the first back pressure chamber 716 releases pressure. The first diaphragm 72 is pushed upward by the water flow to compress the first spring 76 and open the first water outlet 713. The water inlet channel 711 is connected to the water outlet channel 712, and water flows out from the water outlet channel 712 to the inside of the water tank 1, thereby realizing water intake of the water inlet valve 7. As water flows into the water inlet valve 7, the water level inside the water tank 1 will rise. After the water level rises to the position of the float 74, the float 74 will rise due to the buoyancy, and at the same time drive the telescopic rod 75 and the plug 73 to rise until the plug 73 blocks the first pressure relief hole 715. The pressure in the first back pressure chamber 716 increases, and the water flow in the water inlet channel 711 will flow into the first back pressure chamber 716 from the first water supply hole. The first diaphragm 72 will move downward under the push of the water flow, stretching the first spring 76 and blocking the first water outlet 713, disconnecting the water inlet channel 711 and the water outlet channel 712, so that the water inlet valve 7 closes the water inlet.

[0044] Specifically, a diaphragm seat 78 is provided on the first water outlet 52, and the first diaphragm 72 is arranged on the diaphragm seat 78. The bottom opening of the diaphragm seat 78 is connected to the first water outlet 52, and the side wall of the first diaphragm seat and the water inlet valve 7 is provided with a water hole to form a water outlet channel 712.

[0045] Furthermore, the telescopic rod 75 can be extended and adjusted in length, thereby adjusting the height of the float 74. The higher the height of the float 74, the higher the water level in the water tank 1 needs to rise in order to drive the float 74 to float, thereby closing the water inlet valve 7, and vice versa. As a result, the water inlet valve 7 of the present invention can be adapted to water tanks 1 of different sizes, with good versatility to meet market demand. Moreover, when the size of the water tank 1 is fixed, the water inlet volume of the water tank 1 can also be adjusted to meet different usage requirements. It should be noted that the top height of the overflow pipe 23 must be higher than the height of the float 74 to ensure the normal use of the overflow pipe 23.

[0046] Specifically, the telescopic rod 75 includes an inner rod 751 and an outer rod 752. The outer rod 752 is hollow. The bottom of the inner rod 751 is movably disposed up and down within the outer rod 752 to enable telescopic adjustment. The top of the inner rod 751 is connected to a float 74. The bottom of the inner rod 751 is provided with a locking structure that locks or unlocks the inner rod 751 with the outer rod 752. Once the length of the telescopic rod 75 is adjusted, the locking structure locks the inner rod 751 and the outer rod 752 together, preventing further extension or retraction. Conversely, the inner rod 751 and the outer rod 752 can be unlocked to adjust the length of the telescopic rod 75. The locking structure can be implemented in a variety of ways, as long as it can unlock or lock the inner rod 751 and the outer rod 752, without limitation. For example, in one embodiment, the locking structure is an external thread provided on the bottom of the inner rod 751, and the inner wall of the outer rod 752 is provided with an internal thread that is threadedly connected to the bottom of the inner rod 751. Rotating the inner rod 751 adjusts the length of the telescopic rod 75.

[0047] In another preferred embodiment, the locking structure is an elastic sphere 753 disposed at the bottom of the inner rod 751. The elastic sphere 753 has an interference fit with the inner wall of the outer rod 752, thereby locking the inner rod 751 and the outer rod 752. Due to the elasticity of the elastic sphere 753, the outer rod 752 is fixed. When a force is applied upward or downward to the inner rod 751, the elastic sphere 753 moves upward or downward, thereby causing the inner rod 751 to move upward or downward relative to the outer rod 752, thereby adjusting the length of the telescopic rod 75. The elastic sphere 753 is made of rubber or other elastic material. In addition, the top of the outer rod 752 is provided with an opening with a diameter smaller than the diameter of the elastic sphere 753. When the outer rod 752 moves excessively upward, the elastic sphere 753 will be stuck in the opening to prevent the inner rod 751 from separating from the outer rod 752.

[0048] Key references Figure 5 and Figure 8 The structure of the drain valve 5 is similar to that of the water inlet valve 7, and specifically includes a drain valve body 53, a second diaphragm 54, a pressure relief seat 55, and a solenoid valve 56. The drain valve body 53 is internally provided with a second water outlet 531 communicating with its water inlet 51 and water outlet 52. The second diaphragm 54 is arranged above the second water outlet 531 to open and close the second water outlet 531. The pressure relief seat 55 is arranged above the second diaphragm 54 and forms a second back pressure chamber 536 between the pressure relief seat 55 and the second diaphragm 54. The second back pressure chamber 536 is provided with a pressure relief seat 55. There is a second spring 57, which is respectively in contact with the pressure relief seat 55 and the second diaphragm 54. A second ejector pin 58 is provided on the second spring 57. The second diaphragm 54 is provided with a second water supply hole for the second ejector pin 58 to pass through. The second water supply hole is connected to the water inlet 51 and the second back pressure chamber 536. The pressure relief seat 55 is provided with a second pressure relief channel 532 connected to the second back pressure chamber 536. The valve head of the solenoid valve 56 is used to open and close the second pressure relief channel 532. The sensing device 6 is connected to the solenoid valve 56 signal.

[0049] The principle of the drain valve 5 is as follows: when the user stands up after defecation, the sensing device 6 is triggered, and the sensing device 6 controls the valve head of the solenoid valve 56 to open the second pressure relief channel 532, and the second back pressure chamber 536 is depressurized. The water flowing in from the water inlet 51 pushes the second diaphragm 54 upward to open the second water outlet 531, and the second spring 57 is compressed. The water inlet 51 and the water outlet 52 of the drain valve 5 are connected, and drainage begins; when drainage is completed, the sensing device 6 controls the valve head of the solenoid valve 56 to close the second pressure relief channel 532, and the pressure in the second back pressure chamber 536 increases. Water flows from the second water replenishment hole into the second back pressure chamber 536 to push the second diaphragm 54 downward to block the second water outlet 531, and the second spring 57 is reset. The water inlet 51 and the water outlet 52 of the drain valve 5 are disconnected, and the drain valve 5 is closed.

[0050] Specifically, the drain valve body 53 includes an upper cover 534 and a seat body 535. The water inlet 51 of the drain valve 5 is arranged on the upper cover 534, and the water outlet 52 is arranged on the seat body 535. The second water outlet 531 and the second diaphragm 54 are arranged on the seat body 535. The side wall opening of the seat body 535 is connected to the water inlet 51. The seat body 535 is provided with a second pressure relief hole 533 connected to the second pressure relief channel 532. The solenoid valve 56 is arranged below the second pressure relief hole 533. The valve head of the solenoid valve 56 opens and closes the second pressure relief channel 532 by opening and closing the second pressure relief hole 533.

[0051] Key references Figure 9The sensing device 6 includes a sensing panel 61 and a sensing control module 62. The sensing panel 61 is removably mounted within the sensing window 21 to expose the wall surface. The sensing panel 61 includes a panel bracket 612 and a panel body 611. The panel bracket 612 is removably mounted on the sensing window 21 via bolts. The panel body 611 covers and is fastened to the panel bracket 612. When disassembly and maintenance are required, the panel body 611 is first removed, followed by the panel bracket 612, to expose the sensing window 21. The sensing control module 62 is disposed on the inner side of the sensing panel 61, i.e., the inner side of the panel bracket 612, and is signal-connected to the solenoid valve 56.

[0052] Key references Figure 1-3 The water tank 1 and the embedded box 2 can be fixed to the wall by means of a mounting plate 9 and expansion bolts. Mounting ear plates 16 are provided on both sides of the water tank 1 and the embedded box 2. The mounting ear plates 16 are provided with vertical grooves 161. The vertical grooves 161 are fixed to the mounting plate 9 by bolts. The setting of the vertical grooves 161 can compensate for the installation height error of the water tank 1 and the embedded box 2, and also facilitates the height adjustment of the embedded box 2.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the design of this case. Any equivalent changes made based on the key design of this case shall fall within the scope of protection of this case.

Claims

1. A universal induction concealed water tank flush valve, characterized by: It includes a water tank, an embedded box, an outlet pipe, a toilet, a drain valve, and a sensing device; the water tank and the embedded box are both installed in the wall, the embedded box is installed below the water tank, the bottom of the water tank is provided with an outlet pipe connected to the interior of the water tank, the outlet pipe passes through the embedded box and is connected to the toilet; a drain valve is provided inside the embedded box, the drain valve is installed on the outlet pipe to control the connection between the outlet pipe and the water tank, a sensing window is opened on the surface of the embedded box, the sensing device is installed in the sensing window and is connected to the drain valve signal.

2. A universal induction concealed tank flush valve according to claim 1, characterized in that: The water outlet pipe includes a first fixed pipe, an adjusting pipe and a second fixed pipe from top to bottom. The water inlet of the drain valve is detachably connected to the bottom of the water tank, and the water outlet of the drain valve is detachably connected to the top of the first fixed pipe. The two ends of the adjusting pipe are movably connected to the bottom end of the first fixed pipe and the top end of the second fixed pipe respectively. The embedded box is connected to the adjusting pipe and moves up and down with the adjusting pipe. The bottom end of the second fixed pipe is connected to the toilet.

3. A universal induction concealed tank flush valve according to claim 2, characterized in that: The two ends of the regulating tube are movably connected to the first fixed tube and the second fixed tube respectively through sealing rings.

4. The universal induction concealed tank flush valve according to claim 1, characterized in that: The interior of the embedded box is also detachably provided with an inlet valve and an overflow pipe, wherein the inlet valve is connected to the bottom of the water tank, the top of the overflow pipe extends into the interior of the water tank, and the bottom of the overflow pipe is connected to the outlet pipe.

5. The universal induction concealed tank flush valve according to claim 4, characterized in that: The bottom of the water tank is provided with a first connecting pipe, a second connecting pipe, and a third connecting pipe extending into the interior of the embedded box. The water inlet valve is detachably connected to the first connecting pipe. The water inlet and water outlet of the drain valve are detachably connected to the second connecting pipe and the water outlet pipe respectively. The top of the overflow pipe passes through the third connecting pipe to extend into the water tank.

6. A universal induction concealed tank flush valve according to claim 5, characterized in that: The water inlet valve is detachably installed in the first connecting pipe through a union nut, the water inlet and water outlet of the drain valve are detachably connected to the second connecting pipe and the water outlet pipe respectively through union nuts, and the top and bottom of the overflow pipe are respectively connected to the third connecting pipe and the water outlet pipe through union nuts.

7. The universal induction concealed tank flush valve according to claim 4, characterized in that: The water inlet valve includes a water inlet valve body, a first diaphragm, a plug, a float and a telescopic rod. The water inlet valve body is detachably mounted on the bottom of the water tank. The water inlet valve body is internally provided with a water inlet channel and a water outlet channel. The water outlet channel communicates with the interior of the water tank. The top of the water inlet channel is provided with a first water outlet communicating with the water outlet channel. The first diaphragm is disposed above the first water outlet to open and close the first water outlet. The water inlet valve body is provided with a first pressure relief channel above the first diaphragm, a first pressure relief hole is provided at the top of the first pressure relief channel, the plug is movably arranged in the first pressure relief channel to open and close the first pressure relief hole, and a first back pressure chamber connected to the first pressure relief channel is formed between the plug and the diaphragm; The telescopic rod is vertically arranged inside the water tank, and the top and bottom of the telescopic rod are respectively connected to a float and a plug.

8. The universal induction concealed tank flush valve according to claim 7, characterized in that: The telescopic rod includes an inner rod and an outer rod. The bottom of the outer rod is connected to a plug. The interior of the outer rod is hollow. The bottom of the inner rod is movably arranged inside the outer rod, and the bottom of the inner rod is provided with a locking structure for locking or unlocking with the outer rod. The top of the inner rod is connected to a float.

9. The universal induction concealed tank flush valve according to claim 1, characterized in that: The drain valve includes a drain valve body, a second diaphragm, a pressure relief seat, and a solenoid valve. A water inlet and a water outlet are provided at both ends of the drain valve body. A second water outlet connecting the water inlet and the water outlet is provided inside the drain valve body. The second diaphragm is arranged above the second water outlet to open and close the second water outlet. The pressure relief seat is arranged above the second diaphragm and forms a second back pressure cavity between the pressure relief seat and the second diaphragm. A second pressure relief channel connected to the second back pressure cavity is provided on the pressure relief seat. The valve head of the solenoid valve is used to open and close the second pressure relief channel. The sensing device is connected to the solenoid valve signal.

10. The universal induction concealed tank flush valve according to claim 1, characterized in that: The sensing device includes a sensing panel and a sensing control module. The sensing panel is detachably installed in the sensing window to expose the wall surface. The sensing control module is arranged on the inner side of the sensing panel and is connected to the solenoid valve signal.

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