CN213625880U - Drain valve with liquid feeding device and closestool with same - Google Patents

Abstract

The utility model discloses a drain valve and have closestool of this drain valve with liquid feeding device, this drain valve is located in the water tank of closestool, and it includes: the valve body with the outlet, the activity is located the case of valve body and be used for the drive the case is opened the drainage switch of outlet still includes liquid feeding device, and liquid feeding device includes stock solution box and liquid filler, and the liquid filler has inlet, inner chamber and liquid outlet, and inlet and liquid outlet all are linked together with the inner chamber, the inlet with the stock solution box is linked together, and the liquid outlet is linked together with the overflow pipe of water tank, drainage switch linkage liquid filler for the liquid filler is extruded the liquid in the inner chamber to the overflow pipe in. The utility model discloses can add liquid sanitizer automatically, the existing use adds at present, simple structure, and can reach the quantitative effect that provides the sanitizer, liquid filling ware liquid feeding back reset process every time simultaneously again with the liquid suction in the stock solution box to reserve in the liquid filling ware, convenient and practical.

Description

Drain valve with liquid feeding device and closestool with same

Technical Field

The utility model relates to a sanitary clean field, in particular to drain valve and have closestool of this drain valve with liquid feeding device.

Background

Existing cleaning products for toilets contain a solid cleaning block and a liquid cleaning agent. The solid cleaning block is usually directly thrown into the water tank of the toilet and dissolved in the water tank, and the solid cleaning block is flushed into the toilet bowl along with the water in the water tank in the flushing process of the water tank, so that the cleaning effect is achieved. When the solid cleaning block is used, the solid cleaning block can be continuously dissolved in water to cause waste, and meanwhile, accessories in a water tank can be corroded, so that the service life of the accessories of the water tank is influenced; the liquid detergent needs to be poured into the toilet bowl manually, the operation is not simple and convenient enough, and the addition amount of the detergent changes along with the change of pouring strength and the like, so that quantitative addition cannot be realized.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a can add the drain valve of liquid sanitizer automatically, it is easy and simple to handle, and can reach the effect that the ration provided the sanitizer, avoid unnecessary extravagant.

For realizing the purpose of the utility model, the utility model adopts the technical proposal that:

the utility model provides a drain valve with liquid feeding device, locates in the water tank, includes: the valve body with the water outlet, the movable valve core arranged on the valve body, the drainage switch used for driving the valve core to open the water outlet, and the liquid adding device, wherein the liquid adding device comprises a liquid storage box and a liquid filler, the liquid filler is provided with a liquid inlet, an inner cavity and a liquid outlet, the liquid inlet and the liquid outlet are communicated with the inner cavity, the liquid inlet is communicated with the liquid storage box, the liquid outlet is communicated with an overflow pipe of the water tank, the drainage switch is linked with the liquid filler, so that the liquid filler extrudes the liquid in the inner cavity into the overflow pipe, and the liquid filler can suck the liquid in the liquid storage box into the inner cavity in the resetting process.

Optionally, still include the fluid infusion box, the fluid infusion box pass through fluid infusion passageway with the stock solution box is linked together, the fluid infusion box include the box body and with the lid that the lid connects can be dismantled to the box body.

Optionally, an exhaust port is further formed in the liquid storage box, an exhaust check valve for controlling the opening and closing of the exhaust port is arranged at the exhaust port, and when the liquid storage box enters the liquid, the exhaust check valve opens the exhaust port to enable gas in the inner cavity of the liquid storage box to be exhausted through the exhaust port; the exhaust check valve closes the exhaust port when the liquid level in the inner cavity of the liquid storage box reaches a preset height.

Further, the exhaust check valve comprises a floating barrel, the floating barrel is arranged in the liquid storage box and matched with the exhaust port, the exhaust port is closed when the floating barrel floats, and the exhaust port is opened when the floating barrel falls; alternatively, the first and second electrodes may be,

the exhaust check valve adopts a solenoid valve and further comprises a liquid level sensor used for sensing the liquid level of the liquid storage box, and the liquid level sensor controls the solenoid valve to open and close the exhaust port.

Optionally, the liquid storage box is detachably fixed on one side of the valve body, and the liquid filler is installed on the liquid storage box.

Optionally, the drain switch includes an electric control switch, and the electric control switch directly drives the liquid charger by controlling a mechanical transmission component or a pressure fluid, or the electric control switch drives the valve core by controlling a mechanical transmission component or a pressure fluid and drives the liquid charger by the valve core.

Optionally, the drain switch comprises a fluid actuating assembly comprising a cylinder and a piston slidably connected to the cylinder for driving the charger, the fluid medium of the fluid actuating assembly being a gas or a liquid.

Optionally, the liquid charger comprises a body with the inner cavity, and a piston rod slidably connected in the body, the body is provided with the liquid inlet, the piston rod is internally provided with a flow passage, the inlet of the flow passage is arranged on the side wall of the piston rod, the inlet of the flow passage is communicated with the inner cavity, the outlet of the flow passage is communicated with the liquid outlet, the outer wall of the piston rod is provided with a sealing element, the piston rod is in sliding sealing fit with the inner wall of the body through the sealing element, the sealing element can axially move relative to the piston rod to open or close the inlet of the overflowing channel, when the piston rod moves along the compression direction, the sealing element opens the inlet of the overflowing channel, the seal closes the inlet of the transfer passage when the piston rod moves in a direction opposite to the compression direction; the liquid inlet is provided with a liquid inlet one-way valve, and when the piston rod moves along the compression direction, the liquid inlet one-way valve closes the liquid inlet.

Optionally, the drain switch further comprises a manual switch, the manual switch is provided with a key, the key is connected to the liquid supplementing box in an assembling mode, and the liquid supplementing box is connected to the top wall of the water tank in an assembling mode.

The utility model also provides a closestool, it includes foretell drain valve and water tank.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1. the utility model provides a drain valve with liquid filling device, drainage switch and liquid filling device linkage make the liquid filling device extrude the liquid in its inner chamber to the overflow pipe of water tank, thereby realized can add liquid sanitizer automatically, add now, simple structure, and can reach the effect that the sanitizer is provided to the ration, can pump the liquid in the stock solution box to the liquid filling device for subsequent use in the process of resetting after the liquid filling of liquid filling device each time simultaneously, convenient and practical;

2. the drain valve provided by the utility model is also provided with a liquid supplementing box which can supplement liquid for the liquid storage box and can be arranged on the top wall of the water tank, and the liquid supplementing operation is convenient and labor-saving;

3. the utility model discloses a stock solution box is equipped with the gas vent, and gas vent department is equipped with the exhaust check valve, and during the stock solution box feed liquor, the gas vent was opened to the exhaust check valve and gas in making the inner chamber of stock solution box passes through the gas vent and discharges, and the gas vent is closed when the liquid level of exhaust check valve in the inner chamber of stock solution box reachs predetermined height.

Drawings

FIG. 1: a schematic perspective view of example 1;

FIG. 2: embodiment 1 is a schematic perspective view in another direction;

FIG. 3: example 1 schematic view in normal state (non-draining state);

FIG. 4: example 1 schematic view in working state (drainage state);

FIG. 5: example 1 schematic diagram of a fluid infusion box with a fluid infusion cover in a fluid infusion state;

FIG. 6: embodiment 1 a top view of a fluid infusion box with a fluid infusion cover in a fluid infusion state;

FIG. 7: schematic view of the exhaust check valve of embodiment 1 in an open state;

FIG. 8: an enlarged schematic view of region a in fig. 7;

FIG. 9: schematic view of exhaust check valve of embodiment 1 in closed state

FIG. 10: an enlarged schematic view of region B in fig. 9;

FIG. 11: schematic diagram of the liquid charger of example 1 in normal state (no liquid charging state);

FIG. 12: schematic view of the other direction of the liquid charger of example 1 in normal state (no-liquid-charging state);

FIG. 13: schematic representation of the liquid charger of example 1 in working condition (charging condition);

FIG. 14: schematic representation of the liquid charger of example 1 in the other direction in the working state (charging state);

FIG. 15; schematic exploded view of the liquid charger of example 1.

In the figure:

1. a valve body 11, a water outlet 12 and an overflow pipe;

2. a valve core;

3. a drain switch 311, a control box 312, a fluid actuating assembly 3121, a cylinder, 31221, a telescoping rod, 313, a ram, 3131, a jack-up tip, 3132, a connection tip, 314, a boom, 321, a button;

4. liquid adding device, 41, liquid storage box, 410, exhaust port, 4101, annular cavity, 4102, vent groove, 411, exhaust check valve, 4111, floating barrel, 412, fixing seat, 42, liquid filler, 421, liquid inlet, 422, liquid outlet, 423, body, 4231, inner cavity, 424, piston rod, 4241, flow passage, 42411, inlet, 42412, outlet, 4242, upper piston rod, 42421, blocking edge, 4243, lower piston rod, 42431, limit boss, 425, sealing element, 426, reset piece, 427, plugging piece, 428, cover body, 429, liquid adding head, 43, liquid supplementing box, 431, liquid supplementing passage, 432, box body, 4321, accommodating cavity, 433 and box cover.

Detailed Description

The technical problem that the intelligent closestool is single in descaling mode exists in the prior art. Therefore, the present invention provides a new solution, and for a clearer representation, the present invention will be described in detail with reference to the accompanying drawings.

Example 1:

referring to fig. 1 to 15, the present embodiment discloses a drain valve disposed in a water tank (not shown), the drain valve including a valve body 1, a valve core 2, a drain switch 3, and a liquid adding device 4. As shown in fig. 3 and 4, the valve body 1 has a water outlet 11, an overflow pipe 12 (as shown in fig. 2) of the water tank is also fixedly connected to the valve body 1, the valve core 2 is movably disposed in the valve body 1 so as to open or close the water outlet 11, and the drain switch 3 is used for driving the valve core 2 to move so as to open or close the water outlet 11, so as to control the drain valve to drain water or stop draining water. The liquid adding device 4 is used for adding a liquid detergent to descale and clean the toilet and comprises a liquid storage box 41 and a liquid adding device 42, the liquid adding device 42 is provided with a liquid inlet 421 and a liquid outlet 422, the liquid inlet 421 is communicated with the liquid storage box 41, the liquid outlet 422 is communicated with the overflow pipe 12, the drainage switch 3 is linked with the liquid adding device 42, so that the liquid adding device 42 extrudes the liquid in the liquid adding device 42 to the overflow pipe 12, and the liquid adding device 42 can suck the liquid in the liquid storage box 41 to the liquid adding device 42 in the resetting process so as to be used for adding liquid next time.

Referring to fig. 1 to 6, the drain valve provided in this embodiment may further include a fluid replenishment cartridge 43, and the fluid replenishment cartridge 43 is used to replenish the liquid storage cartridge 41 with the cleaning agent. The reservoir 41 may be detachably provided at one side of the valve body (right side as shown in fig. 1), the fluid replenishing cartridge 41 may be provided above the valve body 1 (as shown in fig. 1 to 6), the fluid replenishing cartridge 43 is connected to the reservoir 41 through a fluid replenishing passage 431, and the fluid replenishing passage 431 may be formed of a hose or a pipe. As shown in fig. 1-4, the fluid-replenishing box 43 includes a box body 432 and a box cover 433, and the box cover 433 is detachably attached to the box body 432. Specifically, referring to fig. 6, an independent detergent containing cavity 4321 is provided in the box 432, an inlet end of the fluid supply channel 431 is connected to a detergent outlet of the containing cavity 4321, and an outlet end of the fluid supply channel 431 is connected to a detergent inlet of the liquid storage box 41. Fig. 5 shows a flowing direction of the detergent during fluid replacement, and referring to fig. 5, the detergent outlet of the receiving chamber 4321 may be disposed at the bottom of the receiving chamber 4321, and the detergent inlet of the reservoir 41 may be disposed at the top of the reservoir 41, so that fluid can be automatically replaced by gravity.

Referring to fig. 1 to 10, an air outlet 410 (as shown in fig. 2) is further disposed on the liquid storage box, an air outlet check valve 411 for controlling the opening and closing of the air outlet 410 is disposed at the air outlet 410, and when the liquid storage box 41 is fed with liquid, the air outlet check valve 411 opens the air outlet 410 so that air in the inner cavity of the liquid storage box 41 is exhausted through the air outlet 410; the air exhaust check valve 411 closes the air exhaust port 410 when the liquid level in the inner cavity of the liquid storage box 41 reaches a predetermined height. In this embodiment, exhaust check valve 411 includes floating barrel 4111, and floating barrel 4111 is located in liquid storage box 41 and is cooperateed with gas vent 410, and when the sanitizer in liquid storage box 41 was enough many, when floating barrel 4111 floated, closed gas vent 410, when the sanitizer in liquid storage box 41 was not enough, gas vent 410 was opened when floating barrel 4111 whereabouts, and the gas in the inner chamber of liquid storage box 41 discharged through gas vent 410 this moment, and liquid storage box 41 can carry out the feed liquor. Specifically, fig. 7 to 8 and fig. 9 to 10 are schematic diagrams of the check valve 411 being in an open state and a closed state, respectively, the exhaust port 410 is provided with an annular chamber 4101 and a vent groove 4102 which are communicated, the vent groove 4102 may be in a thin slit shape, when the float 4111 floats, a top wall of the float 4111 closes the annular chamber 4101, thereby cutting off the communication between the vent groove 4101 and the inner chamber of the liquid storage box 41, that is, the exhaust port 410 is in the closed state and cannot exhaust air, when the float 4111 falls, the annular chamber 4101 is opened, thereby allowing the vent groove 4101 to be communicated with the inner chamber of the liquid storage box 41, that is, the exhaust port 410 is in the open state and can exhaust air. In other embodiments, the exhaust check valve 411 may also adopt a solenoid valve (not shown), and the drain valve may further include a liquid level sensor (not shown) for sensing the liquid level of the liquid storage box 41, wherein the liquid level sensor controls the solenoid valve to open and close the exhaust port 410, specifically, when the liquid level of the liquid storage box 41 is lower than a predetermined height, the liquid level sensor controls the solenoid valve to open the exhaust port 410, and when the liquid level of the liquid storage box 41 reaches the predetermined height, the liquid level sensor controls the solenoid valve to close the exhaust port 410. Referring to fig. 1 to 6, a liquid charger 42 may be provided between the valve body 1 and the reservoir 41 to make the drain valve more compact, and the liquid charger 42 is preferably mounted on the reservoir 41 for the convenience of assembly. In this embodiment, referring to fig. 11-15, the liquid charger 42 is a pump-shaped structure, and includes a body 423 and a piston rod 424, the body 423 is hollow to form an inner cavity 4231, and the piston rod 424 is slidably connected in the body 42. The liquid inlet 421 of the liquid filler 42 is arranged at the bottom of the body 423, the detergent outlet of the liquid storage box 41 is communicated with the liquid inlet 421 through a connecting piece (such as a hose), and the liquid inlet 421 is communicated with the inner cavity 4231, so that the detergent can enter the inner cavity 4231 from the liquid storage box 41 through the liquid inlet 421. The piston rod 424 is a rod-shaped structure with one end closed and the other end open, a flow passage 4241 is formed in the hollow interior of the piston rod 424, an inlet 42411 of the flow passage 4241 is arranged on the side wall of one side of the closed end of the piston rod 424, and the inlet 42411 is communicated with the inner cavity 4231. The outlet 42412 of the flow passage 4241 is an open end of the piston rod 424, the outlet 42412 is communicated with the liquid outlet 422 or the same, and the liquid outlet 422 is communicated with the overflow pipe 12 through a connector (such as a hose). In this embodiment, the overflow pipe 12 is fixed to the valve body 1, but the overflow pipe 12 may be provided independently of the drain valve. Referring to fig. 1-6, a fixing seat 412 for fixing the liquid charger 42 is further provided on an outer wall of the liquid storage box 41 near the valve body 1, for mounting the liquid charger 42.

Referring to fig. 11-15, a sealing member 425 is further disposed on the outer wall of the piston rod 424, and the sealing member 425 is, for example, a double Y-shaped sealing ring. The seal 425 is movable in the axial direction of the piston rod 424 to open or close the inlet 42411, and the piston rod 424 is in sliding sealing engagement with the inner wall of the body 423 through the seal 425. When piston rod 424 moves in a compression direction (piston rod 424 moves from top to bottom as shown in fig. 13), seal 425 moves relative to piston rod 424 to a position opening inlet 42411 under the action of friction between seal 425 and the inner wall of body 423, and when piston rod 424 moves in a direction opposite to the compression direction (piston rod 424 moves from bottom to top), seal 425 moves relative to piston rod 424 to a position closing inlet 42411 under the action of friction between seal 425 and the inner wall of body 423. A liquid inlet one-way valve is further arranged at the liquid inlet 421, the liquid inlet one-way valve is a blocking piece 427 described below, and the liquid inlet one-way valve closes the liquid inlet 421 when the piston rod 424 moves along the compression direction.

Specifically, the piston rod 424 includes an upper piston rod 4242 and a lower piston rod 4243, the bottom end of the lower piston rod 4243 is closed, and the inlet 42411 is disposed on a side wall of the lower piston rod 4243 near the bottom end. The upper piston rod 4242 is sleeved on the outer wall of the lower piston rod 4243. The outer wall of the bottom of the upper piston rod 4242 is provided with a retaining edge 42421, the closed end of the lower piston rod 4243 is provided with a limit boss 42431, and the inlet 42411 is arranged on the side wall above the limit boss 42431. The sealing member 425 is located between the retaining rim 42421 and the retaining boss 42431 and is movable in the axial direction (from top to bottom, or from bottom to top) of the piston rod 424 to open or close the inlet 42411. The stop edge 42421 and the limit boss 42431 can limit the movement of the sealing element 425, so that the liquid filling accuracy and precision of the liquid filler 42 are improved.

Referring to fig. 11-15, the liquid charger 42 further comprises a reset member 426 and a blocking member 427, the reset member 426 is used for providing power to move the piston rod 424 in the direction against the compression, and the blocking member 427 is movably disposed in the liquid inlet port 421 to open or block the liquid inlet port 42. Referring to fig. 11, the liquid inlet 421 is a tapered structure with a large top and a small bottom, the restoring member 426 is a spring, for example, and abuts against the closed end of the lower piston rod 4243 and the inner wall of the body 423 where the liquid inlet 421 is disposed, and the blocking member 427 is a glass bead, for example. Further, the filler 42 may also include a cap body 428 and a filler head 429. The filling head 429 is an L-shaped tubular structure, one end of which is connected to the top of the upper piston rod 4242, and the other end of which is connected to the inlet of the overflow pipe 12 through a connector (e.g., a hose). The cover 428 is covered on the top of the body 423, a through hole for the upper piston rod 4242 to pass through is formed in the cover 428, and the cover 428 and the body 423 can be covered and connected in an internal and external thread fit or snap fit manner. The liquid feeding head 429 has a pressing surface formed thereon, and the drain cock 3 is fitted to the pressing surface.

The utility model provides an among the drain valve, drainage switch 3 can contain electric control switch. The electric control switch directly drives the liquid filler 42 by controlling a mechanical transmission part or pressure fluid, or the electric control switch drives the valve core 2 to move and drives the liquid filler 42 by driving the valve core 2. Referring to fig. 1 to 6, the drain switch 3 includes a control box 311 and a fluid actuating assembly 312, and an air pump is disposed in the control box 311 and supplies air to the fluid actuating assembly 312 through a pipe. The fluid actuated assembly 312 includes a cylinder 3121 and a piston slidably coupled to the cylinder 3121 for driving the liquid charger 42, and the fluid medium of the fluid actuated assembly 312 is a gas, i.e., the cylinder 3121 is a cylinder. Of course, the fluid of the fluid actuated assembly 312 may also be selected to be a liquid, i.e., the cylinder 3121 is a hydraulic cylinder. Specifically, as shown in fig. 3, 4 and 6, the control box 311 is provided on the other side of the valve body 1, which is opposite to the liquid storage box 41. The fluid actuation assembly 312 is disposed at a position between the reservoir 41 and the valve body 1, and above the liquid charger 42. One end of the piston is connected with a telescopic rod 31221 that can be used to squeeze the liquid charger 42. The cylinder 3121 is further rotatably connected with a top rod 313, one end of the top rod 313 is a jacking end 3131 for lifting the valve core 2, the other end is a connection end 3132, and the connection end 3132 is in linkage fit with the telescopic rod 31221, so that the fluid actuating assembly 312 simultaneously brakes the valve core 2 for drainage and the liquid filler 42 for filling, that is, the drainage switch 3 is in linkage with the liquid filler 42. The valve body 1 can be rotatably connected with a suspension arm 314, and the suspension arm 314 is used for suspending the top rod 313 to form a stable transmission linkage mechanism with the top rod 313. Preferably, the fluid infusion box 43 is attached to the top wall of the water tank, so that fluid infusion can be directly performed without opening the tank cover, and the use is more convenient. Referring to fig. 1 to 6, the drain switch 3 may further include a manual switch having a button 321, and the button 321 may be mounted on the fluid supply tank 43, so that the structure is more compact.

Referring to fig. 3, 4 and 11-14, the present embodiment is used as follows:

when the control box 311 receives a drainage command, it delivers fluid to the fluid actuating assembly 312, so as to control the piston motion of the fluid actuating assembly 312, and the piston motion drives the telescopic rod 31221 to extend downwards, changing the state of the top rod 313 from the initial connecting end 3132 high, the state of the top end 3131 low to the state of the top end 3131 high, and the connecting end 3132 low, so as to lift the valve core 2 to open the drainage outlet 11 for drainage; meanwhile, the telescopic rod 31221 extrudes the liquid adding head 429, the liquid adding head 429 drives the piston rod 424 to move along the compression direction (downwards), the blocking piece 427 (glass beads) blocks the liquid inlet 421, the sealing piece 425 (Y-shaped ring) moves upwards for a small section relative to the piston rod 424 under the friction action to open the inlet 42411 of the overflowing channel, so that the detergent in the inner cavity 4231 of the liquid filler can be extruded to the liquid outlet 422 through the overflowing channel 4241 and flows into the overflow pipe 12 through a hose (and then flows into the toilet through the overflow pipe 12), and the liquid adding/extruding process is completed;

when the telescopic rod 31221 stops squeezing the liquid adding head 429, the piston rod 424 moves against the compression direction (upwards) under the action of the reset piece 426 (a spring), the sealing piece 425 (a Y-shaped ring) moves downwards for a short section relative to the piston rod 424 under the action of friction to close the inlet 42411 of the overflowing channel, meanwhile, the liquid adding device inner cavity 4231 generates negative pressure, the blocking piece 427 (glass beads) opens the liquid inlet 421, and the detergent in the liquid storage box 41 is sucked into the inner cavity 4231 for the next liquid adding.

Example 2:

the embodiment discloses a toilet bowl, which comprises the drainage valve and the water tank in the embodiment 1, wherein the drainage valve is arranged in the water tank. Wherein, the liquid adding box 41 can be arranged on the water tank cover of the water tank or integrated with the water tank cover.

The above embodiments are only used for explaining the technical solution of the present invention and not for limiting the same, and although the above embodiments are specific to the present invention, it should be understood by those skilled in the art that the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the present invention, which should be covered by the claims of the present invention.

Claims (10)

1. The utility model provides a drain valve with liquid feeding device, locates in the water tank, includes: the valve body with the outlet, activity locate the case of valve body and be used for driving the case open the drainage switch of outlet, its characterized in that: still include the liquid feeding device, the liquid feeding device includes stock solution box and liquid filler, the liquid filler has inlet, inner chamber and liquid outlet, inlet and liquid outlet all with the inner chamber is linked together, the inlet with the stock solution box is linked together, the liquid outlet with the overflow pipe of water tank is linked together, the drainage switch linkage the liquid filler makes the liquid filler will liquid in the inner chamber is extruded extremely in the overflow pipe, the liquid filler is at the in-process that resets, can aspirate liquid in the stock solution box extremely in the inner chamber.

2. The drain valve with the liquid adding device according to claim 1, wherein: still include the fluid infusion box, the fluid infusion box pass through fluid infusion passageway with the stock solution box is linked together, the fluid infusion box include the box body and with the lid that the lid connects can be dismantled to the box body.

3. The drain valve with the liquid adding device according to claim 1, wherein: the liquid storage box is also provided with an air outlet, the air outlet is provided with an air exhaust one-way valve for controlling the air outlet to be opened and closed, and when the liquid storage box enters the liquid, the air exhaust one-way valve opens the air outlet to enable the air in the inner cavity of the liquid storage box to be exhausted through the air outlet; the exhaust check valve closes the exhaust port when the liquid level in the inner cavity of the liquid storage box reaches a preset height.

4. The drain valve with the liquid adding device according to claim 3, wherein: the exhaust check valve comprises a floating barrel, the floating barrel is arranged in the liquid storage box and matched with the exhaust port, the exhaust port is closed when the floating barrel floats, and the exhaust port is opened when the floating barrel falls; alternatively, the first and second electrodes may be,

the exhaust check valve adopts a solenoid valve and further comprises a liquid level sensor used for sensing the liquid level of the liquid storage box, and the liquid level sensor controls the solenoid valve to open and close the exhaust port.

5. The drain valve with the liquid adding device according to claim 1, wherein: the liquid storage box is detachably fixed on one side of the valve body, and the liquid filler is installed on the liquid storage box.

6. The drain valve with the liquid adding device according to claim 1, wherein: the drainage switch comprises an electric control switch, the electric control switch directly drives the liquid charger by controlling a mechanical transmission part or pressure fluid, or the electric control switch drives the valve core by controlling the mechanical transmission part or the pressure fluid and drives the liquid charger by the valve core.

7. The drain valve with the liquid adding device according to claim 1, wherein: the drainage switch comprises a fluid actuating assembly, the fluid actuating assembly comprises a cylinder and a piston, the piston is connected with the cylinder in a sliding mode and used for driving the liquid charger, and a fluid medium of the fluid actuating assembly is gas or liquid.

8. The drain valve with the liquid adding device according to claim 1, wherein: the liquid charger comprises a body with the inner cavity and a piston rod connected in the body in a sliding way, the body is provided with the liquid inlet, the piston rod is internally provided with a flow passage, the inlet of the flow passage is arranged on the side wall of the piston rod, the inlet of the flow passage is communicated with the inner cavity, the outlet of the flow passage is communicated with the liquid outlet, the outer wall of the piston rod is provided with a sealing element, the piston rod is in sliding sealing fit with the inner wall of the body through the sealing element, the sealing element can axially move relative to the piston rod to open or close the inlet of the overflowing channel, when the piston rod moves along the compression direction, the sealing element opens the inlet of the overflowing channel, the seal closes the inlet of the transfer passage when the piston rod moves in a direction opposite to the compression direction; the liquid inlet is provided with a liquid inlet one-way valve, and when the piston rod moves along the compression direction, the liquid inlet one-way valve closes the liquid inlet.

9. The drain valve with the liquid adding device according to claim 2, wherein: the drainage switch further comprises a manual switch, the manual switch is provided with a key, the key is connected to the liquid supplementing box in an assembling mode, and the liquid supplementing box is connected to the top wall of the water tank in an assembling mode.

10. A toilet, characterized in that: comprising a drain valve according to any one of claims 1-9 and said water tank.

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