CN212336201U

CN212336201U - Induction type flushing tank

Info

Publication number: CN212336201U
Application number: CN202020961139.3U
Authority: CN
Inventors: 戴松涛
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2021-01-12
Anticipated expiration: 2030-05-29

Abstract

The utility model discloses an induction type flushing tank, which comprises a water tank shell, a flushing valve and a water inlet valve, wherein a main control circuit and an electric element are arranged in the water tank shell, and an induction element is also arranged on the surface of the water tank shell; the water inlet valve comprises a water inlet valve body and a valve sleeve, a water inlet hole and a water inlet electromagnetic valve are arranged at the upper end of the valve sleeve, and a water level sensor is arranged below the water inlet electromagnetic valve of the valve sleeve; the flushing valve comprises a seat body and a push rod which penetrates through the seat body and moves relative to the seat body, the upper end of the push rod is in transmission connection with the electric component, the lower end of the push rod is connected with a soft sealing gasket to seal or open a water outlet of a shell of the water tank, and a reset compression spring is arranged between the push rod and the seat body in a propping and abutting mode. The utility model discloses make intaking and the drainage of flushing tank pass through electric control and realize intelligent control, avoided adopting full mechanical structure to appear intaking easily and the unusual phenomenon of drainage, and through the inductive element induction type drainage, need not to press the bath, be applicable to old man and child and use.

Description

Induction type flushing tank

Technical Field

The utility model relates to an automatic flushing water tank technical field especially relates to an induction type flushing tank.

Background

Flush tanks are used in toilets to flush contaminates into sewer lines, and typically include a water intake section and a water discharge section.

The existing flushing tank on the market has the following defects:

a water inlet part: the water inlet valve of the water inlet part controls water inlet and outlet by a set of floating valve, when the water level is low, the floater naturally falls down through a connecting rod to drive the bracket to open the siphon port, water is supplied to the water inlet surface, and when the water level rises, the floater rises under the action of buoyancy to drive the bracket to close the siphon port to stop water inlet. The full-mechanical structure is easy to clamp the floater due to foreign matters such as water scale and the like, so that water cannot normally enter, if water cannot enter or always enters, the water cannot enter, so that the whole flushing tank cannot be used, and the water of the flushing tank overflows when the water enters all the time, so that water resources are wasted or indoor properties are damaged.

A drainage part: the flushing valve of the drainage part is controlled to open through a set of link mechanism, when drainage is needed, the link mechanism can be driven to work to realize drainage by using higher pressure, such as about 1.5 kilograms of pressure, so that the old and children with small strength can not drain smoothly; meanwhile, the valve is closed by the self gravity of the mechanical structure and the water pressure after drainage, if foreign matters are clamped in the drainage port in the water tank, the valve cannot be sealed, water can be drained all the time and water cannot be stored, and then water source waste is caused.

Its intake of current flushing tank and drainage all adopt full mechanical structure promptly, appear the foreign matter jamming easily and lead to intaking or the drainage is unusual, wastes water resource, and need great pressure strength during the drainage, is not suitable for old person and child.

Therefore, the prior art has yet to be improved.

SUMMERY OF THE UTILITY MODEL

In view of the foregoing prior art's weak point, an object of the utility model is to provide an induction type flushing tank aims at making intaking and the drainage of flushing tank pass through electric control and realize intelligent control, has avoided adopting full mechanical structure to appear intaking easily and the unusual phenomenon of drainage, and through induction element induction type drainage, need not to press and wash by water, is applicable to old man and child and uses.

In order to achieve the purpose, the utility model adopts the following technical proposal:

an induction type flushing tank comprises a tank shell, a water inlet and a water outlet which are arranged on the tank shell, a water inlet valve which is arranged in the tank shell and connected with the water inlet, and a flushing valve which is arranged in the tank shell and connected with the water outlet, wherein the water inlet valve and the flushing valve respectively control the on-off of the water inlet and the water outlet, wherein,

the water tank comprises a water tank shell, a main control circuit and an electric element, wherein the main control circuit and the electric element are arranged in the water tank shell, the electric element is electrically connected with the main control circuit, the main control circuit and the electric element are separated from water in the water tank shell and are arranged in a waterproof mode, and an induction element electrically connected with the main control circuit is exposed on the surface of the water tank shell;

the water inlet valve comprises a water inlet valve body and a valve sleeve, wherein the water inlet valve body is arranged on the water tank shell and is communicated with the water inlet, the valve sleeve is arranged on the water inlet valve body, the water inlet valve body is arranged in a hollow mode, a water inlet hole and a water inlet electromagnetic valve for opening or closing the water inlet hole are formed in the upper end of the valve sleeve, a water level sensor is further arranged below the water inlet electromagnetic valve in the valve sleeve, and the water inlet electromagnetic valve and the water level sensor are;

the flushing valve comprises a seat body arranged at a water outlet of the water tank shell and a push rod which penetrates through the seat body and moves relative to the seat body, the upper end of the push rod is in transmission connection with the electric component, the electric component drives the push rod to move up and down, the lower end of the push rod is connected with a soft sealing gasket, the soft sealing gasket is positioned above the water outlet and moves up and down along with the push rod to seal or open the water outlet, and a reset compression spring is arranged between the push rod and the seat body in.

The water inlet and the water outlet are both positioned at the bottom of the water tank shell, and the water inlet valve and the flushing valve are vertically arranged at intervals.

Wherein, the water tank shell is provided with internal threads at the water inlet and the water outlet;

the base comprises a threaded rod arranged at the bottom, a drainage frame arranged in the middle and a pressing sleeve covering the upper end of the drainage frame, the threaded rod is provided with an external thread which is fixedly connected with an internal thread at the drainage port of the water tank shell, and the side wall of the drainage frame is provided with a drainage hole communicated with a drainage port;

the push rod includes from last drive screw, connecting rod, the locating lever that sets gradually extremely down, drive screw is connected with the transmission of electronic spare, the locating lever wears to locate the compressing tightly cover of pedestal, and the outer wall cover of locating lever is established the pressure spring resets, the locating lever in pressure spring's that resets lower extreme is provided with spacing step, pressure spring's that resets upper end with compress tightly the cover butt, lower extreme and spacing step butt, the bottom of locating lever is provided with soft sealed the pad.

The water inlet valve body is provided with an external thread and is fixedly connected with an internal thread at a water inlet of the water tank shell, the outer wall of the upper end of the water inlet valve body is provided with a plurality of adjusting protrusions at intervals, the inner wall of the valve sleeve is provided with adjusting grooves, and the adjusting protrusions are clamped with the adjusting grooves and used for adjusting the installation height of the valve sleeve on the water inlet valve body.

The water level limiting sensor is arranged above the water level sensor in the valve sleeve, the safety electromagnetic valve is arranged at the position of the water inlet at the lower end of the water inlet valve body, and the water level limiting sensor and the safety electromagnetic valve are electrically connected with the main control circuit and perform linkage control on the highest water level in the water tank shell.

The water tank is characterized in that a waterproof box is arranged at the top of the water tank shell, and a main control circuit, an electric part and an induction element are installed in the waterproof box.

The water outlet is provided with a water outlet opening, wherein the sensing element is a touch switch, and the touch duration of the touch switch controls the opening duration of the water outlet.

The water outlet is provided with a water outlet opening, the water outlet opening is communicated with the water outlet opening, the sensing element is an infrared detection switch, and the opening time of the water outlet opening is controlled by the infrared receiving time of the infrared detection switch.

Wherein, the water tank shell is provided with pipe fitting connecting nuts at the water inlet and the water discharge port.

Wherein, 304 stainless steel springs are adopted as the reset compression springs.

The utility model discloses an induction type flushing tank, through set up master control circuit in the water tank casing, at water intaking valve part setting and master control circuit connection's the solenoid valve of intaking and level sensor, set up the inductive element electricity and move the piece at the flushing valve part, the push rod, soft sealing pad and reset compression spring, level sensor detects the water level in the water tank casing, master control circuit controls according to opening and close of the height control solenoid valve of water level and intakes, effectively avoided the foreign matter jamming and lead to the failure of intaking or intake overflow like this. When the water tank is flushed, after the sensing element receives a sensing signal, the main control circuit controls the electric part to drive the push rod to move upwards, the soft sealing gasket is opened to realize automatic drainage, and then the water tank shell is closed through the automatic return of the reset compression spring to store water in the water outlet. Thus the utility model discloses an induction type flushing tank has realized the intelligent automatic control of intaking and drainage, has guaranteed the stability of product work, has avoided among the prior art full mechanical type structure to appear intaking easily because of unusual and the unusual phenomenon of drainage, just the utility model discloses an induction type flushing tank passes through induction element induction type drainage, need not to press and washes by water, is applicable to old man and child and uses.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic view of a first embodiment of an induction type flushing tank of the present invention;

fig. 2 is a schematic structural view of a first embodiment of the induction type flushing tank of the present invention;

fig. 3 is a schematic view of the induction flushing tank water inlet and drainage control of the present invention.

Description of reference numerals:

100-flushing tank, 1-tank shell, 11-water inlet, 12-water outlet, 13a, 13 b-pipe fitting connecting nut, 2-water inlet valve, 21-water inlet valve body, 211-adjusting protrusion, 22-valve sleeve, 221-water inlet hole, 222-adjusting groove, 23-water inlet electromagnetic valve, 24-water level sensor, 25-water level limit sensor, 26-safety electromagnetic valve, 3-flushing valve, 31-seat body, 311-threaded rod, 312-drainage rack, 3121-drainage hole, 313-pressing sleeve, 32-push rod, 321-driving screw rod, 322-connecting rod, 323-positioning rod, 3231-limit step, 4-main control circuit, 5-electric piece, 6-induction element, 7-soft sealing gasket, 8-a reset compression spring and 9-a waterproof box.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "connected" may be a fixed connection or a removable connection, or may be integral therewith; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

In a first embodiment, please refer to fig. 1 to 2, the present invention provides an inductive flushing tank 100, which includes a tank housing 1, a water inlet 11 and a water outlet 12 provided on the tank housing 1, a water inlet valve 2 disposed in the tank housing 1 and connected to the water inlet 11, and a flushing valve 3 disposed in the water outlet 12, wherein the water inlet valve 2 and the flushing valve 3 respectively control the on-off of the water inlet 11 and the water outlet 12.

Install main control circuit 4 and the electronic piece 5 of being connected with main control circuit 4 electricity in the water tank casing 1, main control circuit 4 and electronic piece 5 separate and waterproof setting with the water in the water tank casing 1, water tank casing 1 surface still exposes and is provided with the inductive element 6 of being connected with main control circuit 4 electricity. The sensing element 6 is used for receiving a sensing signal and transmitting the sensing signal to the main control circuit 4 to trigger flushing. The sensing element 6 may be a touch sensitive switch or an infrared switch, etc.

The water inlet valve 2 comprises a water inlet valve body 21 which is arranged on the water tank shell 1 and communicated with the water inlet 11, and a valve sleeve 22 arranged on the water inlet valve body 21, wherein the water inlet valve body 21 is arranged in a hollow mode, the upper end of the valve sleeve 22 is provided with a water inlet 221 and a water inlet electromagnetic valve 23 for opening or closing the water inlet 221, the valve sleeve 22 is further provided with a water level sensor 24 below the water inlet electromagnetic valve 23, and the water inlet electromagnetic valve 23 and the water level sensor 24 are electrically connected with the main control circuit 4. The inlet water enters from the inlet 11, flows into the valve sleeve 22 through the bottom of the inlet valve body 21, and then flows out of the water tank housing 1 through the inlet hole 221 of the valve sleeve 22 to be stored. The water level sensor 24 is used for detecting the water level in the water tank housing 1, if the water level is low, the main control circuit 4 opens the water inlet electromagnetic valve 23 to feed water, and if the water level is high, the main control circuit 4 closes the water inlet electromagnetic valve 23 to stop feeding water. The water inlet solenoid valve 23 is a normally closed solenoid valve. Thus, the water level sensor 24 and the water inlet electromagnetic valve 23 are used for controlling the water inlet of the flush water tank 100, and the phenomenon that the mechanical mechanism of the float valve is easy to fail or overflow due to the blockage of foreign matters in the prior art is avoided.

The utility model discloses a flushometer 3 is including setting up in the pedestal 31 of 12 departments in the outlet of water tank shell 1, wears to locate the push rod 32 that pedestal 31 removed relatively in the pedestal 31, and the transmission is connected on the push rod 32 the

electric component

5, 5 drive push rods 32 of electric component reciprocate, and the push rod 32 lower extreme is connected with the soft sealed pad 7, and the soft sealed pad 7 is located outlet 12 top and follows the push rod 32 and reciprocate sealedly or open outlet 12, it is provided with the pressure spring 8 that resets to go back the butt between push rod 32 and the pedestal 31. The electric element 5 is connected with the push rod 32 by a transmission device, such as a rack-and-pinion or worm-and-gear transmission.

The electric component 5 of the present invention can provide power for the motor, etc. A solenoid valve may also be used to move the push rod 32.

The sensing element 6 receives the sensing signal and then triggers a flushing process, if a person touches the sensing switch or shields the infrared switch, a triggering signal is generated, the main control circuit 4 controls the electric part 5 to rotate according to the triggering signal, the electric part 5 rotates to drive the push rod 32 to move upwards, the push rod 32 moves upwards to move the soft sealing gasket 7 at the tail end of the push rod 32 to open the water outlet 12, a book in the water tank shell 1 is flushed out from the water outlet 12 to complete flushing, flushing time can be preset through the main control circuit 4 or is determined according to receiving duration of the sensing signal, if the time for touching the sensing switch or shielding the infrared switch is longer, the longer the time for keeping the water outlet 12 lifted by the soft sealing gasket 7 in an open state after the electric part 5 is powered on.

The soft sealing gasket 7 plays a role in sealing the water outlet 12, the reset compression spring 8 firmly presses the soft sealing gasket 7 to be tightly pressed against the water outlet 12 in an initial state, so that the sealing effect is enhanced, and meanwhile, even if foreign matters exist in the water outlet 12, the water outlet 12 can be sealed under the double compression action of the soft sealing gasket 7 and the reset compression spring 8, so that the good sealing effect is achieved. Meanwhile, after the electric moving part 5 loses power after flushing, the reset compression spring 8 can pull back the push rod 32 to reset the soft sealing gasket 7 at the bottom of the push rod 32 to seal the water outlet 12, and electric energy is not required to be supplied in the resetting process, so that energy is saved.

Thus, the flush tank 100 of the present invention does not need to be pressed by a force as in the prior art, and thus avoids the drawback of failed flush operation due to insufficient force when used by the elderly or children. Meanwhile, the electric and electric actuator controls the push rod 32 to drive the soft sealing gasket 7 and the reset compression spring 8 to seal the water outlet 12, so that the defect that sealing failure is easy to occur in the prior art is overcome.

Preferably, the return pressure spring 8 of the present invention is a 304 stainless steel spring. The 304 stainless steel spring can prevent corrosion and prolong the service life.

Preferably, as shown in fig. 1, the water inlet 11 and the water outlet 12 of the flush tank 100 of the present invention are located at the bottom of the tank housing 1, and the water inlet valve 2 and the flush valve 3 are vertically spaced apart. This facilitates the installation of the inlet valve 2 and the flush valve 3, as well as the waterproof isolation of the electrical components of the flush tank 100. The inflow water enters the bottom of the inflow valve 2 from the inflow port 11, then flows upward, and flows out from the inflow hole 221 of the valve housing 22 into the inside of the tank case 1.

Specifically, as shown in fig. 2, the tank case 1 is provided with internal threads at both the water inlet 11 and the water outlet 12.

The base 31 comprises a threaded rod 311 arranged at the bottom, a drainage frame 312 arranged in the middle and a pressing sleeve 313 covering the upper end of the drainage frame 312, the threaded rod 311 is provided with external threads which are fixedly connected with internal threads at the drainage port 12 of the water tank shell 1, and the side wall of the drainage frame 312 is provided with a drainage hole 3121 communicated with the drainage port 12. The threaded rod 311, the drainage rack 312 and the pressing sleeve 313 are all arranged in a hollow mode. The threaded rod 311 and the drainage frame 312 can be of an integrated structure, the drainage frame 312 is detachably connected with the pressing sleeve 313, and the pressing sleeve 313 is covered after the soft sealing gasket 7, the push rod 32 and the reset pressing spring 8 in the drainage frame 312 are installed.

The push rod 32 includes from last to the transmission screw 321, connecting rod 322, the locating lever 323 that set gradually down, transmission screw 321 is connected with the transmission of electronic 5, the locating lever 323 wears to locate the cover 313 that compresses tightly of pedestal 31, and the outer wall cover of locating lever 323 is established the housing spring 8 that resets, the locating lever 323 in the lower extreme that resets housing spring 8 is provided with spacing step 3231, the upper end and the cover 313 butt that compresses tightly of housing spring 8 that resets, lower extreme and spacing step 3231 butt, the bottom of locating lever 323 is provided with soft sealed pad 7. The positioning rod 323 can position both the return hold-down spring 8 and the entire push rod 32, so that the push rod 32 moves up and down linearly within the housing 31.

The electric element 5 rotates to drive the transmission screw 321 to move upwards, so as to drive the connecting rod 322 and the positioning rod 323 to move upwards, the soft sealing gasket 7 at the bottom of the positioning rod 323 moves upwards in the space in the drainage rack 312 to open the drainage port 12, and the water in the water tank shell 1 flows into the drainage port 12 from the drainage hole 3121 on the side wall of the drainage rack 312 and is drained. When the positioning rod 323 moves upwards, the limiting step 3231 compresses the reset compression spring 8 to enable the reset compression spring 8 to store resilience force, and after the electric part 5 loses power, the reset compression spring 8 directly pulls back the positioning rod 323.

Preferably, the utility model discloses an it is fixed that the valve body 21 of intaking is provided with the internal thread connection of external screw thread and the 1 water inlet 11 department of water tank shell, the outer wall of the valve body 21 upper end of intaking still the interval is provided with a plurality of regulation archs 211, valve barrel 22 inner wall still is provided with adjustment groove 222, adjust protruding 211 and adjustment groove 222 block for adjust the mounting height of valve barrel 22 on the valve body 21 of intaking.

In this way, the mounting height of the valve sleeve 22 on the water inlet valve body 21 can be adjusted, so that the height of the water level sensor 24 on the valve sleeve 22 can also be adjusted, and thus the height of the stored water in the cistern housing 1 can be adjusted.

Further, a water level limit sensor 25 is further arranged above the water level sensor 24 of the valve sleeve 22, a safety electromagnetic valve 26 is further arranged at the position of the water inlet 11 at the lower end of the water inlet valve body 21, and the water level limit sensor 25 and the safety electromagnetic valve 26 are both electrically connected with the main control circuit 4 and perform linkage control on the highest water level in the water tank shell 1.

The spacing sensor 25 of water level and safety solenoid valve 26 are the second way defence line of the height of intaking in the water tank shell 1, and water valve 2 was intake always after water level sensor 24 became invalid or intake solenoid valve 23 became invalid promptly, and when water level that spacing sensor 25 of water level detected in the water tank shell 1 reached the highest water level, start safety solenoid valve 26 and close water inlet 11, like this the utility model discloses a flush tank 100 has carried out dual guarantee to intaking, and prevents that the overflow condition from taking place. The embodiment of the utility model provides an in, can be through setting up, directly start safety solenoid valve 26 and close water inlet 11 when water level sensor does not sense the signal of closing the solenoid valve of intaking in 20 minutes or the settlement time after the flashing valve 3 is washed by water, can guarantee like this that the intaking in the water tank shell 1 can not appear unusually and spill over.

The safety solenoid valve 26 of the present invention is a normally closed waterproof solenoid valve.

Preferably, as shown in fig. 2, the top of the water tank housing 1 of the present invention is provided with a waterproof box 9, and the main control circuit 4, the electric component 5 and the sensing element 6 are installed in the waterproof box 9. The arrangement of the waterproof box 9 makes the electric elements in the flushing tank 100 of the present invention obtain waterproof protection. The electric piece 5 penetrates out of the waterproof box 9 through the transmission device and can be arranged in a sealing mode.

Preferably, as an embodiment, the sensing element 6 of the present invention is a touch switch, and the time length of the touch switch controls the time length of opening of the water outlet.

As another embodiment, the sensing element 6 of the present invention is an infrared detection switch, and the time of the infrared reception of the infrared detection switch controls the time of opening the water outlet.

Thus, the flushing time can be controlled in a stepless manner, if the time that a user touches the touch switch or the time that the infrared detection switch is shielded is less than 1 second, the induction signal is less than 1 second, an electric component (such as a motor) is electrified to work, and the flushing time lasts for 1.5 seconds; when the time that the user touches the touch switch or the time that the infrared detection switch is shielded is more than 1 second, the induction signal is more than 1 second, the electric component (such as a motor) is electrified to work, and the flushing time lasts for 3 seconds.

As shown in fig. 2, preferably, the water tank housing 1 of the present invention is provided with pipe connection nuts 13a and 13b at the water inlet 11 and the water outlet 12. The pipe fittings connecting nuts 13a, 13b are convenient for the water inlet pipe, the water outlet pipe and the utility model discloses the quick erection joint of induction type flushing tank 100.

The embodiment of the utility model provides an induction type flushing tank 100, through set up main control circuit 4 in

water tank shell

1, 2 parts set up the water inlet solenoid valve 23 and the level sensor 24 of being connected with main control circuit 4 at water intaking valve, 3 parts set up sensing element 6 at the flashing valve, electric component 5, push rod 32, the flexible sealing pad 7 and the compression spring that resets, level sensor 24 detects the water level in the water tank shell 1, main control circuit 4 controls opening and close and control according to the height control water inlet solenoid valve 23 of water level and intakes. When the water tank is flushed, after the sensing element 6 receives a sensing signal, the main control circuit 4 controls the electric part 5 to drive the push rod 32 to move upwards, the soft sealing gasket 7 is opened to realize automatic drainage, and then the water tank shell 1 is automatically returned to close the drainage port 12 for storing water through the reset compression spring 8. Thus the utility model discloses an induction type flushing tank 100 has realized the intelligent automatic control of intaking and drainage, has guaranteed the stability of product work, has avoided among the prior art full mechanical type structure to appear intaking easily because of unusual and the unusual phenomenon of drainage, just the utility model discloses an induction type flushing tank 100 need not to press and washes by water, is applicable to old man and child and uses.

The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.

Claims

1. An induction type flushing tank comprises a tank shell, a water inlet and a water outlet which are arranged on the tank shell, a water inlet valve which is arranged in the tank shell and connected with the water inlet, and a flushing valve which is arranged in the tank shell and connected with the water outlet, wherein the water inlet valve and the flushing valve respectively control the on-off of the water inlet and the water outlet,

2. The inductive flush tank of claim 1, wherein said water inlet and outlet are located at the bottom of the tank housing, said water inlet valve and flush valve being vertically spaced apart.

3. The induction flush tank of claim 2, wherein said tank housing is internally threaded at both said water inlet and said water outlet;

4. The induction type flushing tank as recited in claim 3, wherein said water inlet valve body is provided with external threads for being fixedly connected with internal threads at the water inlet of the tank housing, the outer wall of the upper end of said water inlet valve body is further provided with a plurality of regulating protrusions at intervals, the inner wall of said valve housing is further provided with a regulating groove, and said regulating protrusions are engaged with said regulating groove for regulating the installation height of the valve on the water inlet valve body.

5. The induction type flushing tank as recited in claim 3, wherein the valve sleeve is further provided with a water level limit sensor above the water level sensor, the lower end of the water inlet valve body is further provided with a safety electromagnetic valve at the position of the water inlet, and the water level limit sensor and the safety electromagnetic valve are both electrically connected with the main control circuit and perform linkage control on the highest water level in the water tank shell.

6. The induction flushing cistern as recited in claim 1 wherein a waterproof box is provided on the top of the cistern housing, and a main control circuit, an electric element and an induction element are installed in the waterproof box.

7. The inductive flush tank according to claim 1, wherein said inductive element is a touch switch, the touch duration of said touch switch controlling the open duration of the drain.

8. An induction flushing cistern as claimed in claim 1, characterized in that the inductive element is an infrared detection switch, the duration of infrared reception of which controls the duration of opening of the drain.

9. The induction flushing tank of claim 1 wherein the tank housing is provided with plumbing connection nuts at both the water inlet and the water outlet.

10. The inductive flush tank according to claim 1, wherein said return hold-down spring is a 304 stainless steel spring.