CN2748529Y - Automatic water feeding device of water closet - Google Patents

Automatic water feeding device of water closet Download PDF

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Publication number
CN2748529Y
CN2748529Y CN 200420096987 CN200420096987U CN2748529Y CN 2748529 Y CN2748529 Y CN 2748529Y CN 200420096987 CN200420096987 CN 200420096987 CN 200420096987 U CN200420096987 U CN 200420096987U CN 2748529 Y CN2748529 Y CN 2748529Y
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CN
China
Prior art keywords
water
storage tank
rubber cushion
valve body
communicated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN 200420096987
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Chinese (zh)
Inventor
赵绍增
丁冠生
李洪彬
***
臧成功
王建轶
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bnbm Group Shandong Weifang Construction Ceramic Factory
Original Assignee
Bnbm Group Shandong Weifang Construction Ceramic Factory
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bnbm Group Shandong Weifang Construction Ceramic Factory filed Critical Bnbm Group Shandong Weifang Construction Ceramic Factory
Priority to CN 200420096987 priority Critical patent/CN2748529Y/en
Application granted granted Critical
Publication of CN2748529Y publication Critical patent/CN2748529Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses an automatic water feeding device of water closet, comprising a controlling valve. The valve base of the controlling valve is provided with an upper valve body, a lower valve body and a water-stopping rubber pad. A water-controlling cavity is formed between the upper valve body and the water-stopping rubber pad, and a main water flow channel is formed between the water-stopping rubber pad and the lower valve body. One end of the main water flow channel is communicated with a water inlet pipe, and the other end of the main water flow channel is communicated with a water-storage tank through an enclosed water outlet channel. The water-stopping rubber pad is provided with a water-entering controlling channel which can communicates the main water flow channel and the water-controlling cavity, and the water-entering controlling channel is provided with a valve core which can be axially moved and liquid sealed with the water-entering controlling channel. When the valve core is axially moved in the water-entering controlling channel, the water in the main water flow channel is introduced to the water-controlling cavity, and the water-controlling cavity is alternatively communicated or cutoff with the atmosphere. The utility model is has convenience installation, fast and quiet water entry, no torque bearing, long service life and uneasy damage. When the water is stopped, the water in the water-storage tank can not flow backward, the water source is not contaminated, and the water can be automatically supplied to a siphon water closet.

Description

The automatic water inflow device that is used for flush toilet
Technical field
The utility model relates to the automatic water inflow device technical field, relates in particular to a kind of automatic water inflow device that is used for flush toilet.
Background technology
The known automatic water inflow device that is used for flush toilet comprises the upper valve body and the following valve body that are installed in the valve seat, is provided with the sealing rubber cushion between upper valve body and the following valve body, forms the control water cavity of sealing between upper valve body and the sealing rubber cushion; Form main flow channel between sealing rubber cushion and the following valve body, main flow channel one end is communicated with water inlet pipe, and its other end is communicated with storage tank by the exhalant canal of sealing, and the sealing rubber cushion is provided with the controlled water flow that can be communicated with main flow channel and control water cavity and goes into passage.When water level is raised to certain altitude, cursory drive lever rotates, make the projection envelope pressure-controlled water export end of being fixed in the lever other end, partition control water cavity is communicated with atmosphere, and this moment, main current continued to flow into storage tank by main flow channel, and while sub-fraction water enters the control water cavity by the water-flowing trough of sealing rubber cushion, rising along with hydraulic pressure in the control water cavity, force the sealing rubber cushion to produce distortion,, thereby stop into water main flow channel, partition.Its shortcoming is: first, when projection envelope pressure-controlled water export end, it moves and is restricted, cursory no longer come-up, but the water level of storage tank continues to raise, and forces the cursory buoyancy that is subjected to greater than its gravity, and this buoyancy can make automatic water inflow device bear torque, the long-time use damaged easily.Second, for when intaking, can not send the sound that dabbles, often near the bottom of storage tank, because delivery port is not had by the water logging in the storage tank, main flow channel, exhalant canal and storage tank have just formed the sealing connected component to the delivery port of exhalant canal, when the tap water pipe network is cut off the water, water in the storage tank can be back in the tap water pipe network by exhalant canal and main flow channel, and siphonage promptly takes place, and polluted source.The 3rd, after the flush toilet draining, the siphon wc pan domestic demand retains a part of water, prevents to return flavor.During the big yield draining, can produce negative pressure in outfall, the water capacity in the water closet also needs manually to mend a part of water easily by emptying in water closet, to seal the return trap of water closet, brought inconvenience to the user.
The utility model content
Technical problem to be solved in the utility model is: a kind of automatic water inflow device that is used for flush toilet is provided, to solve when cutting off being communicated with of control water cavity and atmosphere, because the cursory buoyancy that is subjected to greater than its gravity, make automatic water inflow device bear torque, the long-time use, the problem of damaging easily.
For solving the problems of the technologies described above, the technical solution of the utility model is: the automatic water inflow device that is used for flush toilet, comprise water inlet pipe, the delivery port place of this water inlet pipe is provided with control valve, this control valve comprises valve seat, and upper and lower valve body is installed in the valve seat, is provided with the sealing rubber cushion between the upper and lower valve body, form the control water cavity of sealing between upper valve body and the sealing rubber cushion, upper valve body is provided with the controlled water flow outlet; Form main flow channel between sealing rubber cushion and the following valve body, main flow channel one end is communicated with water inlet pipe, and its other end is communicated with storage tank by the exhalant canal of sealing, and the sealing rubber cushion is provided with and main flow channel can be gone into passage with the controlled water flow that the control water cavity is communicated with; Be subjected to the lever of cursory control to be articulated in upper valve body, the controlled water flow of described sealing rubber cushion go into be provided with in the passage can move axially and can with the spool of its liquid sealing, spool passes upper valve body and hinged with lever from the controlled water flow outlet, when spool moves axially in controlled water flow is gone into passage, the water of main flow channel can be introduced the control water cavity, and selectively make the control water cavity be communicated with or cut off with atmosphere.
When spool moves axially in controlled water flow is gone into passage, the water of main flow channel is introduced the control water cavity, and selectively make the control water cavity be communicated with or cut off with atmosphere, can adopt following structure to realize: controlled water flow is gone into the radial direction through hole that passage comprises the axially extending bore of mutual perforation, and spool is arranged in the axially extending bore; This sealing rubber cushion also is provided with the first hole groove of annular coaxial with axially extending bore and that be communicated with radial direction through hole; The spool outer peripheral face is provided with the axle groove of annular, and axle groove both sides form the shaft shoulder, and the outer peripheral face that is positioned at the spool shaft shoulder of intake tunnel side is provided with some axial water-flowing troughs, and spool and controlled water flow outlet have the water flowing gap.
Owing to adopted technique scheme, when water level is lower than predetermined water level in the storage tank, spool is under the effect of cursory gravity, move to the upper of regulation, the spool of axle groove and axial water-flowing trough part is positioned at the axially extending bore of sealing rubber cushion, the axle groove is corresponding with the first hole groove location, the control water cavity is by the radial direction through hole of sealing rubber cushion, gap between axle groove and the first hole groove and spool communicate with atmosphere with water flowing gap between controlled water flow exports, controlling the interior hydraulic pressure of water cavity this moment is zero, main current enter down the main flow channel of valve body from water inlet pipe, upwards roof pressure sealing rubber cushion enters storage tank fast; Rising along with liquid level, cursoryly move down by the axially extending bore of lever pushing spool along the sealing rubber cushion, enter the axially extending bore of sealing rubber cushion with the spool of lever hinge portion this moment and will control the passage partition of water cavity and atmosphere, this moment, the part current entered the control water cavity from the axial water-flowing trough of spool through the first hole groove, radial direction through hole, increase along with the control water cavity water yield, to make the sealing rubber cushion produce elastic deformation, until main flow channel is sealed, water supply stops, cursory no longer come-up, spool also no longer moves down.During drawdown, move on the spool, when the spool with the lever hinge portion shifts out the axially extending bore of sealing rubber cushion, the control water cavity is communicated with atmosphere, and its interior water yield tails off, and the pressure of sealing rubber cushion is reduced, main current back down the sealing rubber cushion once more, enter storage tank through main flow channel.Therefore as can be seen, the partition of control water cavity and atmosphere is to realize by the inner peripheral surface liquid sealing of the axially extending bore of the outer peripheral face of spool and sealing rubber cushion, the axially extending bore of sealing rubber cushion can not limit moving axially of spool, thereby the cursory buoyancy that can not be subjected to greater than its gravity, so control valve also can not be subjected to the effect of torque, the long-time use is not easy to damage.
As a kind of improvement, the opening that exhalant canal is communicated with storage tank is near the storage tank bottom, and this exhalant canal is provided with outer vent, and this outer vent is positioned at more than the water storage water level of regulation.Thereby exhalant canal communicates constantly with atmosphere, when the tap water pipe network is cut off the water, water in the outlet pipe is because action of gravity produces backflow, but this moment is not because storage tank, exhalant canal and main flow aquaporin form airtight connected component, siphonage can not take place, thereby not refluxing in the assurance storage tank can not pollute the water source.
Improve as another kind, be provided with the branch fluid that the big branch of water can be introduced storage tank, fraction importing storage tank bleed off pipe in the exhalant canal, this shunting body is positioned at dash rubber cushion downside and is sheathed on the water inlet pipe.Tell the part current by a minute fluid and enter water closet, realize automatic water supplement through bleed off pipe.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is the structural representation of the utility model embodiment;
Fig. 2 is a partial sectional view embodiment illustrated in fig. 1;
Fig. 3 is the enlarged drawing of control valve part among Fig. 2.
The specific embodiment
As shown in Figure 1, the automatic water inflow device that is used for flush toilet, water inlet at storage tank 23 is fixed with sleeve pipe 27, this sleeve pipe 27 comprises outer tube 28 and the interior pipe 30 that can be communicated with the tap water pipe network, in pipe 30 have the opening that communicates with storage tank 23 with cavity between the outer tube 28, in water inlet pipe 9 adjustable height save land and are plugged in pipe 30 interior and with interior pipe 30 liquid sealings.Water inlet pipe delivery port place is provided with control valve, and control valve comprises valve seat 1, and valve seat 1 extends to the storage tank bottom around water inlet pipe 9, and its opening forms described exhalant canal near the storage tank bottom between valve base inner wall and the water inlet pipe outer wall.The outer wall of outer tube 28 is provided with external screw thread 29, this external screw thread 29 is suitable with the internal thread of being located at valve seat lower end inwall, and clip 29 is sheathed on the valve seat outer wall, is used to lock the relative position of control valve and sleeve pipe 27, with the setting height(from bottom) of adjusting control valve, adapt to the requirement of different storage tanks.
As shown in Figure 3, upper valve body 5 and following valve body 2 are installed in the valve seat 1, and valve seat 1 upper end clamping valve gap 4 is provided with sealing rubber cushion 3 between upper valve body 5 and the following valve body 2, form the control water cavity B of sealing between upper valve body 5 and the sealing rubber cushion 3, upper valve body 5 is provided with controlled water flow outlet 6; Form main flow channel A between sealing rubber cushion 3 and the following valve body 2, main flow channel A one end communicates with water inlet pipe 9, and the other end communicates with storage tank 23 by exhalant canal.Following valve body 2 can be made as one with water inlet pipe 9, makes automatic water inflow device simple in structure.Sealing rubber cushion 3 is provided with the axially extending bore and the radial direction through hole 13 of mutual perforation, forms controlled water flow jointly and goes into passage; This sealing rubber cushion 3 also is provided with the coaxial first hole groove 14 and the second hole groove, 15, the second hole grooves 14 of axially extending bore and is positioned at main flow channel A side and has axial distance with the first hole groove 14, and the first hole groove 14 connects with radial direction through hole 13.Be provided with in the axially extending bore can with its liquid sealing and can axially movable spool 7, spool 7 passes upper valve body 5 and hinged with lever 8 from controlled water flow outlet 6, be subjected to the lever 8 (as shown in Figure 1) of cursory 31 controls to be articulated in upper valve body 5, cursory 31 can be sheathed on with moving axially valve seat 1 on the outer wall of extension, storage tank bottom, make whole automatic water-supply apparatus compact conformation, be convenient to install.Spool 7 has the water flowing gap with controlled water flow outlet 6.The spool outer peripheral face is provided with the axle groove 12 of annular, and axle groove 12 both sides form the shaft shoulder, and the outer peripheral face that is positioned at the spool shaft shoulder of intake tunnel A side is provided with the first axial water-flowing trough 10 and the second axial water-flowing trough 11 of the certain axial distance in space.
As shown in Figure 2, the body wall that is positioned at exhalant canal is provided with outer vent 25, and this outer vent 25 is positioned at more than the water storage water level of regulation.In the exhalant canal, following valve body 2 downsides are provided with successively and prevent the dash rubber cushion 16 and the branch fluid 24 that be sheathed on water inlet pipe 9 of current from outer vent 25 ejections, divide fluid 24 the big branch of water can be introduced storage tank 23, fraction imports storage tank bleed off pipe (not shown), this minute, fluid 24 1 ends were provided with the support lugn 17 that leans dash rubber cushion 16, its other end is provided with axial splitter box 22, support lugn 17 is provided with interior air vent 18, shunt external side face be provided with can with first flange 19 and second flange 21 of valve base inner wall matched in clearance, first, second flange 19, shunting body sidewall between 21 is provided with radially tap hole 26, be provided with the body wall of corresponding position, tap hole 26 position radially and distribute the mouth of a river 20, distribute the mouth of a river 20 and be provided with the filling pipe 22 that can be communicated with the storage tank bleed off pipe.
Its course of work is as follows: when water level is lower than predetermined water level in the storage tank, spool 7 is under the effect of cursory 31 gravity, move to the upper of regulation, the axle groove of spool 7 and axial water-flowing trough partly are positioned at the axially extending bore of sealing rubber cushion 3, axle groove 12 is corresponding with the first hole groove, 14 positions, control water cavity B is by the radial direction through hole 13 of sealing rubber cushion 7, gap between axle groove 12 and the first hole groove 14 and spool 7 communicate with atmosphere with the water flowing gap that controlled water flow exports between 6, controlling the interior hydraulic pressure of water cavity B this moment is zero, main current enter main flow channel A from water inlet pipe 9, upwards roof pressure sealing rubber cushion 3 enters storage tank fast; Rising along with liquid level, cursory 31 promote spools 7 by lever 8 moves down along the axially extending bore of sealing rubber cushion 3, enter the axially extending bore of sealing rubber cushion 3 at this moment with the spool 7 of lever 8 hinge portions, owing to can realize liquid sealing between them, and the passage that will control water cavity B and atmosphere cuts off, this moment part current from the axial water-flowing trough of spool 7 through the first hole groove 14, radial direction through hole 13 enters control water cavity B, increase along with the control water cavity B water yield, to make sealing rubber cushion 3 produce elastic deformation, until main flow channel is sealed, water supply stops, cursory no longer come-up, and spool 7 also no longer moves down.When drawdown, move on the spool 7, when the spool 7 with lever 8 hinge portions shifts out the axially extending bore of sealing rubber cushion 3, control water cavity B is communicated with atmosphere, the water yield in it tails off, pressure to sealing rubber cushion 3 reduces, and main current back down sealing rubber cushion 3 once more, enters storage tank 23 through main flow channel.As can be seen, the partition of control water cavity B and atmosphere is to realize by the inner peripheral surface liquid sealing of the outer peripheral face of spool 7 and axially extending bore, the axially extending bore of sealing rubber cushion 3 can not limit moving axially of spool 7, thereby the cursory buoyancy that can not be subjected to greater than its gravity, so control valve also can not be subjected to the effect of torque, the long-time use is not easy to damage.
When beginning to intake, spool part between the first axial water-flowing trough 10 and the second axial water-flowing trough 11 and, the first hole groove 14 and the partition wall position between the second hole groove 15 of sealing rubber cushion be corresponding, control water cavity B and main flow channel A partition this moment, increase its water yield thereby avoid the axial water-flowing trough of part current by spool 7 to enter control water cavity B, roof pressure sealing rubber cushion 3 and reduce the water intake velocity of main current.
Because the body wall that is positioned at exhalant canal is provided with outer vent 25, and this outer vent 25 is positioned at more than the water storage water level of regulation, so exhalant canal communicates constantly with atmosphere.When the tap water pipe network is cut off the water, water in the outlet pipe 9 refluxes owing to action of gravity produces, but at this moment because storage tank 23, exhalant canal and main flow aquaporin A do not form airtight connected component, siphonage can not take place, thereby guarantee that the water in the storage tank 23 does not reflux, and does not pollute the water source.Dash rubber cushion 16 is set, can prevents effectively that into the water current send water from outer vent 25 ejections and spatter sound, water inlet fast and quiet.Divide fluid 24 to be provided with at siphon wc pan.After the flush toilet draining, the siphon wc pan domestic demand retains a part of water, prevents to return flavor.During the big yield draining, produce negative pressure in outfall, the water capacity in the water closet needs manually to mend a part of water easily by emptying in water closet, seal the return trap of water closet.Dividing the effect of fluid 24 is when water intake valve, by its 26 fens a part of current of tap hole radially, enters water closet from filling pipe 22 through the bleed off pipe of flush toilet, realizes automatic water supplement.

Claims (10)

1, the automatic water inflow device that is used for flush toilet, comprise water inlet pipe (9), the delivery port place of this water inlet pipe (9) is provided with control valve, this control valve comprises valve seat (1), upper and lower valve body (5,2) is installed in the valve seat (1), upper and lower valve body is provided with sealing rubber cushion (3) between (5,2), forms the control water cavity (B) of sealing between upper valve body (5) and the sealing rubber cushion (3), and upper valve body (5) is provided with controlled water flow outlet (6); Form main flow channel (A) between sealing rubber cushion (3) and the following valve body (2), main flow channel (A) end is communicated with water inlet pipe (9), its other end is communicated with storage tank (23) by the exhalant canal of sealing, and sealing rubber cushion (3) is provided with and main flow channel (A) can be gone into passage with the controlled water flow that control water cavity (B) is communicated with; Be subjected to the lever (8) of cursory (31) control to be articulated in upper valve body (5), it is characterized in that: the controlled water flow of described sealing rubber cushion (3) go into be provided with in the passage can move axially and can with the spool (7) of its liquid sealing, spool (7) passes upper valve body (5) and hinged with lever (8) from controlled water flow outlet (6), when spool (7) moves axially in controlled water flow is gone into passage, the water of main flow channel (A) can be introduced control water cavity (B), and selectively make control water cavity (B) be communicated with or cut off with atmosphere.
2, the automatic water inflow device that is used for flush toilet as claimed in claim 1 is characterized in that: described controlled water flow is gone into axially extending bore and the radial direction through hole (13) that passage comprises mutual perforation, and spool (7) is arranged in the axially extending bore; This sealing rubber cushion (3) also is provided with the first hole groove (14) of annular coaxial with axially extending bore and that be communicated with radial direction through hole (13); The spool outer peripheral face is provided with the axle groove (12) of annular, and axle groove (12) both sides form the shaft shoulder, and the outer peripheral face that is positioned at the spool shaft shoulder of intake tunnel (A) side is provided with some axial water-flowing troughs; Spool (7) has the water flowing gap with controlled water flow outlet (6).
3, the automatic water inflow device that is used for flush toilet as claimed in claim 2 is characterized in that: described water-flowing trough comprises first, second axial water-flowing trough (10,11) of the certain axial distance in space; Sealing rubber cushion (2) is provided with the second hole groove (15) coaxial with axially extending bore, and the second hole groove (15) is positioned at main flow channel (A) side of the first hole groove (14) and has axial distance with the first hole groove (14).
4, as claim 1 or the 2 or 3 described automatic water inflow devices that are used for flush toilet, it is characterized in that: the opening that described exhalant canal is communicated with storage tank is near the storage tank bottom, this exhalant canal is provided with outer vent (25), and this outer vent (25) is positioned at more than the water storage water level of regulation.
5, the automatic water inflow device that is used for flush toilet as claimed in claim 4, it is characterized in that: described valve seat (1) extends to the storage tank bottom around water inlet pipe (9), its opening forms described exhalant canal near the storage tank bottom between valve base inner wall and the water inlet pipe outer wall.
6, the automatic water inflow device that is used for flush toilet as claimed in claim 5 is characterized in that: in described exhalant canal, down valve body (2) downside is provided with and prevents the dash rubber cushion (16) of current from outer vent (25) ejection.
7, the automatic water inflow device that is used for flush toilet as claimed in claim 6, it is characterized in that: be provided with the branch fluid (24) that the big branch of water can be introduced storage tank (23), fraction importing storage tank bleed off pipe in the described exhalant canal, this minute fluid (24) is positioned at dash rubber cushion (16) downside and is sheathed on the water inlet pipe (9).
8, the automatic water inflow device that is used for flush toilet as claimed in claim 7, it is characterized in that: fluid (24) one ends were provided with the support lugn (17) that leans dash rubber cushion (16) in described minute, and its other end is provided with the axial splitter box (22) that the big branch of water can be introduced storage tank (23); Support lugn (17) is provided with interior air vent (18), shunt external side face be provided with can with first flange (19) and second flange (21) of valve base inner wall matched in clearance, shunting body sidewall between first, second flange (19,21) is provided with radially tap hole (26), be provided with the body wall of tap hole (26) corresponding position, position radially and distribute the mouth of a river (20), distribute the mouth of a river (20) and be provided with the filling pipe (22) that can be communicated with the storage tank bleed off pipe.
9, the automatic water inflow device that is used for flush toilet as claimed in claim 5, it is characterized in that: the water inlet of described storage tank (23) is fixed with sleeve pipe (27), this sleeve pipe (27) comprises outer tube (28) and the interior pipe (30) that can be communicated with the tap water pipe network, in pipe (30) have the opening that communicates with storage tank (23) with cavity between the outer tube (28), water inlet pipe (9) adjustable height save land be plugged in the interior pipe (30) and with interior pipe (30) liquid sealing, valve seat (1) is sheathed on outer tube outer wall and is provided with locking device.
10, the automatic water inflow device that is used for flush toilet as claimed in claim 5 is characterized in that: described cursory (31) can be sheathed on with moving axially valve seat (1) on the outer wall of extension, storage tank bottom.
CN 200420096987 2004-10-07 2004-10-07 Automatic water feeding device of water closet Expired - Fee Related CN2748529Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200420096987 CN2748529Y (en) 2004-10-07 2004-10-07 Automatic water feeding device of water closet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200420096987 CN2748529Y (en) 2004-10-07 2004-10-07 Automatic water feeding device of water closet

Publications (1)

Publication Number Publication Date
CN2748529Y true CN2748529Y (en) 2005-12-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 200420096987 Expired - Fee Related CN2748529Y (en) 2004-10-07 2004-10-07 Automatic water feeding device of water closet

Country Status (1)

Country Link
CN (1) CN2748529Y (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102378843A (en) * 2009-03-31 2012-03-14 哇特使韩国株式会社 Backflow prevention apparatus for a toilet fill valve
US8166997B2 (en) 2007-09-27 2012-05-01 Toto, Ltd Toilet flush water supply device
CN101397810B (en) * 2007-09-27 2013-01-02 Toto株式会社 Toilet flush water supply device
CN105386491A (en) * 2015-11-30 2016-03-09 刘文健 Backflow preventing water closet water inlet valve

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8166997B2 (en) 2007-09-27 2012-05-01 Toto, Ltd Toilet flush water supply device
CN101397810B (en) * 2007-09-27 2013-01-02 Toto株式会社 Toilet flush water supply device
CN102378843A (en) * 2009-03-31 2012-03-14 哇特使韩国株式会社 Backflow prevention apparatus for a toilet fill valve
CN102378843B (en) * 2009-03-31 2013-11-27 哇特使韩国株式会社 Backflow prevention apparatus for toilet fill valve
CN105386491A (en) * 2015-11-30 2016-03-09 刘文健 Backflow preventing water closet water inlet valve

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