CN220789993U - Foam shield device - Google Patents

Abstract

The utility model provides a foam shield device, which comprises a body, wherein a liquid suction cavity and a liquid outlet channel communicated with the liquid suction cavity are arranged in the body, and the foam shield device further comprises: the pressure source comprises an input channel, a compression cavity and an output channel, wherein the input channel is connected with fluid; the liquid outlet channel is connected to the foaming unit, and the liquid pumping cavity is used for supplying foaming agent to the foaming unit under the action of the compression cavity; the output channel is connected with the foaming unit and is used for providing fluid for foaming for the foaming unit; the foaming unit is provided with a mixed liquid output channel for outputting mixed liquid mixed by the foaming agent and the fluid; the self-priming spray head comprises a mixing cavity, wherein the mixing cavity is provided with a liquid inlet and an air suction port, and negative pressure is generated in the flowing process of the mixing liquid by the mixing cavity and is sucked by the air suction port. The fluid drives the compression cavity and then drives the liquid drawing cavity to draw liquid to replace the liquid pump to pump foaming agent, natural gas supply is realized through the self-priming spray head to replace the air pump, the device cost is reduced, and the occupation of a control port on the intelligent cover plate main control board is reduced.

Description

Foam shield device

Technical Field

The utility model relates to the technical field of bathroom products, in particular to a foam shield device.

Background

Because the water seal is arranged at the bottom of the closestool, dirty water in the water seal is easy to splash when the closestool is used, foam is covered on the surface of the water seal of the closestool to form a layer of foam shield, so that the splashing can be restrained, meanwhile, the foam also has the functions of sterilization and deodorization, and also can play a role in lubrication, so that dirt is easier to discharge.

The existing foam shield device is controlled by a liquid pump, an air pump and a reversing valve/electromagnetic valve, water is supplied to the foam shield device through the reversing valve/electromagnetic valve, the liquid pump extracts foaming agent stock solution from a liquid storage bottle and supplies the foaming agent stock solution into the foam shield device, the air pump supplies gas, the water, the foaming agent stock solution and the gas are mixed in the foam shield device, foam is generated through a foaming net, the foam is discharged into a water seal, and the foam shield is formed on the surface of the water seal.

Because the liquid pump is required to be used for pumping the foaming agent stock solution, the air pump provides air, so that the cost of the foam shield device is higher, and meanwhile, a control port on the main control board of the intelligent cover plate is required to be occupied.

Disclosure of Invention

In order to solve the problems, the utility model aims to provide the foam shield device, which is characterized in that a liquid pumping function is realized by driving a compression cavity through fluid so as to drive a liquid pumping cavity to replace a liquid pump to pump foaming agent, and natural gas supply is realized by a self-priming spray nozzle so as to replace an air pump, so that the cost of the device is reduced, and the occupation of a control port on a main control board of an intelligent cover plate is reduced.

The utility model is realized by the following steps: the utility model provides a foam shield device, includes the body, this internal drawing liquid chamber and with the play liquid channel that drawing liquid chamber is linked together still includes:

the pressure source comprises an input channel, a compression cavity and an output channel, wherein the input channel is connected with fluid, and the compression cavity is used for providing pressure for the liquid suction cavity;

the liquid outlet channel is connected to the mixing unit, and the liquid pumping cavity is used for supplying foaming agent to the mixing unit through the liquid outlet channel under the action of the compression cavity; the output channel is connected with the mixing unit and is used for providing fluid for foaming for the mixing unit; the mixing unit is provided with a mixed liquid output channel for outputting mixed liquid of foaming agent and fluid; the self-priming spray head comprises a mixing cavity, wherein the mixing cavity is provided with a foam outlet and a liquid inlet communicated with the mixed liquid output channel, the mixing cavity is also provided with an air suction port communicated with the outside atmosphere, and negative pressure is generated in the flowing process of the mixed liquid by the air suction port to suck air.

Preferably, the pressure source further comprises a water tank, and a water pump communicating the water tank and the input channel.

Preferably, the mixing unit is disposed below the water tank.

Preferably, a liquid adding drawer is further arranged on one side of the water tank, a liquid storage cavity for supplying liquid to the liquid pumping cavity is further formed in the body, and a liquid adding pipe is arranged between the liquid adding drawer and the liquid storage cavity.

Preferably, the pressure source further comprises a solenoid valve in communication with the water supply source, the solenoid valve supplying water to the input channel.

Preferably, the pressure source further comprises a water supply mechanism and a flow divider, wherein the water inlet end of the flow divider is communicated with the water supply mechanism; the first water outlet end of the flow divider is communicated with the input channel; the second water outlet end of the diverter is communicated with one or more of a main flushing waterway, a brushing ring waterway and a buttocks and women washing waterway; or the second water outlet end of the flow divider is communicated with the main flushing path, and the third water outlet end of the flow divider is communicated with the water path of the brush ring; or the second water outlet end of the diverter is communicated with the main flushing path, the third water outlet end of the diverter is communicated with the water path of the brush ring, and the fourth water outlet end of the diverter is communicated with the buttocks and women washing path.

Preferably, the toilet bowl is provided with a brush ring pipe forming a brush ring waterway, and the self-priming nozzle is integrated on the brush ring pipe.

Preferably, a diaphragm is arranged between the compression cavity and the liquid pumping cavity, and after the pressure source is started, the diaphragm moves in a first direction under the pressure action of the compression cavity, so that the liquid pumping cavity is compressed to supply liquid to the liquid outlet channel; the body also comprises a liquid storage cavity communicated with the liquid suction cavity, when the diaphragm moves towards the second direction, the liquid suction cavity expands and generates negative pressure, and the liquid suction cavity sucks foaming agent in the liquid storage cavity under the action of the negative pressure.

Preferably, the device further comprises an elastic member for providing elastic force to the membrane, and the membrane moves towards the second direction under the action of the elastic force.

Preferably, the liquid sucking device further comprises a liquid inlet one-way valve and a liquid outlet one-way valve, wherein a liquid inlet channel for communicating the liquid sucking cavity and the liquid storage cavity is arranged between the liquid sucking cavity and the liquid storage cavity, and the liquid inlet one-way valve is arranged in the liquid inlet channel and used for controlling the opening and closing of the liquid inlet channel; the liquid outlet one-way valve is arranged in the liquid outlet channel and used for controlling the opening and closing of the liquid outlet channel; when the diaphragm moves to the first direction to compress the liquid pumping cavity, the liquid inlet one-way valve is closed, and the liquid outlet one-way valve is opened; when the diaphragm moves to the second direction to expand the liquid pumping cavity, the liquid inlet one-way valve is opened, and the liquid outlet one-way valve is closed.

Preferably, the mixed liquid output channel is further provided with an anti-siphon unit, the anti-siphon unit is arranged on the side wall of the water tank, and the anti-siphon unit comprises an air inlet communicated with the mixed liquid output channel.

Preferably, the anti-siphon unit comprises an anti-siphon pipe and an anti-siphon plug, the top of the anti-siphon pipe is provided with a water drain communicated with the air inlet, the bottom of the anti-siphon pipe is provided with a first inlet, and the side wall of the anti-siphon pipe is provided with a first outlet; the siphon-proof plug is arranged in the siphon-proof pipe, is positioned between the first inlet and the water drain port and is used for controlling the opening and closing of the water drain port; the first inlet is connected with the mixed liquid output channel, the first outlet is connected with the liquid inlet of the self-priming spray head, the mixed liquid self-priming spray head further comprises a water draining joint communicated with the water draining port, and the outlet of the water draining joint is connected with the water tank or the air inlet.

Preferably, the anti-siphon unit further comprises an air tap, the air inlet is arranged at the upper end of the air tap, the lower end of the air tap is connected with the air suction port of the self-suction nozzle, the air inlet is connected with an overflow groove, and the overflow groove is connected with the water tank.

The utility model has the beneficial effects that: compared with the prior art, the utility model provides the foam shield device which has at least the following technical effects: 1. the liquid pumping function is realized through the fluid drive compression chamber and then the liquid pumping chamber to replace the liquid pump to pump the foaming agent, natural gas supply is realized through the self-priming nozzle to replace the air pump with the function (when the mixed solution mixed with the foaming agent passes through the mixed gas chamber, venturi effect is generated in the mixed gas chamber, air is sucked in by negative pressure, and foam is generated by mixing air and the mixed solution), the cost of the device is greatly reduced due to the reduction of parts, the complexity of the structure is also reduced, the occupation of a control port on a main control board of an intelligent cover plate is reduced, and the function is more reliable. 2. The pressure source is provided with an independent water pump communicated with the water tank and the input channel, the water level in the water tank is the pressure source (fluid) lifted by the foam shield, or a water path is added to the toilet flushing system to supply water for the pressure source, so that the influence of water pressure on the traditional electromagnetic valve water supply mode (poor foam outlet effect even unusable foam shield under low pressure) is avoided, and zero water pressure availability of the foam shield can be realized. 3. When the foam shield function is started, water flow enters the siphon-proof pipe from the first inlet to jack up the siphon-proof plug, the sealing gasket on the siphon-proof plug closes the water drain port, and the water flow flows out from the first outlet and flows to the self-priming nozzle; when the foam shield function is closed, the anti-siphon plug falls back under the action of gravity, and external air enters from the water outlet to cut off water flow, so that the water flow in the water tank is prevented from continuously losing due to siphon.

Drawings

Fig. 1 is a schematic perspective view of a foam shield apparatus according to the present utility model.

Fig. 2 is a schematic perspective view of an anti-siphon unit of a foam shield apparatus according to the present utility model.

Fig. 3 is a cross-sectional view of an anti-siphon unit of a foam shield apparatus of the present utility model.

Fig. 4 is a schematic perspective view of a brush ring pipe of a foam shield apparatus according to the present utility model.

Fig. 5 is a cross-sectional view of a brush ring tube of a foam shield apparatus of the present utility model.

Fig. 6 is a schematic cross-sectional view of a self-priming nozzle of a foam shield apparatus of the present utility model.

Fig. 7 is an exploded view of the body of a foam shield assembly of the present utility model.

Fig. 8 is a sectional view showing the start-up state of the body of the foam shield apparatus of the present utility model.

Fig. 9 is a cross-sectional view of an adapter of a foam shield apparatus of the present utility model.

Fig. 10 is a partially enlarged schematic view at a in fig. 8.

Fig. 11 is a cross-sectional view showing a stopped state of a body of a foam shield apparatus of the present utility model.

Fig. 12 is a partially enlarged schematic view at B in fig. 11.

Fig. 13 is a schematic view of a foam shield apparatus embodiment of the present utility model.

Fig. 14 is a schematic view of a second embodiment of a foam shield apparatus of the present utility model.

Fig. 15 is a schematic view of a third embodiment of a foam shield apparatus of the present utility model.

Reference numerals illustrate: 1-a liquid extracting cavity, 2-a liquid outlet channel, 3-a compression cavity and 4-an input channel;

5-output channels, 51-adapter, 52-mixing cavity body, 53-pressure-holding small holes;

6-mixing unit, 61-mixing chamber, 62-mixed liquid output channel;

7-self-priming spray head, 71-air mixing cavity, 72-liquid inlet, 73-air suction port, 74-accelerating small hole and 75-bubble outlet;

8-membrane, 9-water tank, 10-liquid inlet channel, 11-elastic piece, 12-liquid inlet one-way valve, 13-liquid outlet one-way valve,

14-anti-siphon units, 141-anti-siphon pipes, 142-anti-siphon plugs, 143-water discharge ports, 144-first inlets, 145-first outlets, 146-air nozzles, 147-air inlets, 148-overflow tanks;

15-of a liquid adding drawer, 16-of a liquid storage cavity, 17-of a water pump, 18-of a sealing cover, 19-of a liquid adding port, 20-of a liquid storage bottle cap, 21-of a liquid adding pipe, 22-of a brush ring pipeline, 221-of a brush ring channel and 222-of a bubble outlet channel;

23-foaming net, 24-air suction pipe, 25-water suction pipe, 26-ball head and 27-liquid storage bottle.

Detailed Description

The utility model will be further described with reference to the drawings and specific examples.

Referring to fig. 1 to 15, a foam shield device includes a body, in which a liquid suction cavity 1 and a liquid outlet channel 2 communicated with the liquid suction cavity 1 are disposed, and further includes:

the pressure source comprises an input channel 4, a compression cavity 3 and an output channel 5, wherein the input channel 4 is connected with fluid, and the compression cavity 3 is used for providing pressure for the liquid suction cavity 1;

the liquid outlet channel 2 is connected to the mixing unit 6, and the liquid pumping cavity 1 is used for supplying foaming agent to the mixing unit 6 under the action of the compression cavity 3; the output channel 5 is connected to the mixing unit 6 for providing the mixing unit 6 with a fluid for frothing; the mixing unit 6 is provided with a mixed liquid output channel 62 for outputting a mixed liquid in which a foaming agent and a fluid are mixed;

the self-priming nozzle 7 comprises a mixing cavity 71, wherein the mixing cavity 71 is provided with a liquid inlet 72 with a bubble outlet 75 communicated with the mixed liquid output channel 62, the mixing cavity 71 is also provided with an air suction port 73 communicated with the outside atmosphere, and negative pressure is generated by the mixing cavity 71 in the flowing process of the mixed liquid and is sucked by the air suction port 73. The liquid pumping function is realized through the fluid driving compression cavity 3 and then the liquid pumping cavity 1 to replace a liquid pump to pump foaming agent, natural gas supply is realized through the self-priming spray head 7 to replace a gas pump (when mixed liquid mixed with the foaming agent passes through the gas mixing cavity 71, venturi effect is generated in the gas mixing cavity 71, air is sucked in by negative pressure, and foam is generated by mixing air and the mixed liquid), the cost of the device is greatly reduced due to the reduction of parts, the complexity of the structure is also reduced, the occupation of control ports on the main control board of the intelligent cover plate is reduced, the fault rate can be reduced due to the reduction of the parts, and the foaming function is more reliable. The preferred fluid may be water or air, but is not limited thereto.

Referring to fig. 1 to 13, the pressure source preferably further includes a water tank 9, and a water pump 17 communicating the water tank 9 and the input passage 4. The water in the water tank 9 is pumped by the independent water pump 17 to provide pressure for a pressure source, so that compared with the water supply by directly adopting a water supply pipe in a building, the pressure in the water supply pipe is not influenced, the problem that the foaming effect is poor when the pressure is low is avoided, and even a foam shield cannot be used is solved.

Referring to fig. 1, the mixing unit 6 is preferably disposed below the water tank 9. Space occupation is reduced.

Referring to fig. 1, preferably, a filling drawer 15 is further disposed on one side of the water tank 9, the body is further provided with a liquid storage cavity 16 for supplying liquid to the liquid suction cavity 1, and a filling tube 21 is disposed between the filling drawer 15 and the liquid storage cavity 16. Is convenient for timely supplementing foaming agent.

Referring to fig. 1 to 12 and 14, the pressure source preferably further includes a solenoid valve (not shown) in communication with the water supply source, the solenoid valve supplying water to the input channel 4. Through independent water supply in water route, make this foam shield device foaming effect more stable.

Referring to fig. 1 to 12 and 15, preferably, the pressure source further comprises a water supply mechanism and a diverter (which may be a switching valve), wherein the water inlet end of the diverter is communicated with the water supply mechanism; the first water outlet end of the flow divider is communicated with the input channel 4; the second water outlet end of the diverter is communicated with one or more of a main flushing waterway, a brushing ring waterway and a buttocks and women washing waterway; or the second water outlet end of the flow divider is communicated with the main flushing path, and the third water outlet end of the flow divider is communicated with the water path of the brush ring; or the second water outlet end of the diverter is communicated with the main flushing path, the third water outlet end of the diverter is communicated with the water path of the brush ring, and the fourth water outlet end of the diverter is communicated with the buttocks and women washing path. Realizing single water source provides multiple play water function, helps reducing whole closestool water supply structure's complexity, reduction in production cost. The preferred water supply means may be a water tank 9 and a water pump 17 and the preferred diverter may be a switching valve.

Referring to fig. 1 to 5, the toilet is preferably provided with a brush ring pipe 22 forming a brush ring water path, and the self-priming nozzle 7 is integrated on the brush ring pipe 22. The complexity of waterway arrangement is reduced, and the production and assembly of products are facilitated. The brush ring pipeline 22 is provided with a brush ring channel 221 and a foam outlet channel 222, and the outlet of the brush ring channel 221 is provided with a ball head 26 for adjusting the spraying angle of brush ring water; the self-priming nozzle 7 is in communication with the bubble outlet channel 222. A bubble generating net 23 is arranged at the joint of the self-priming nozzle 7 and the bubble outlet channel 222. The preferred foam web 23 may be provided in one or more layers. The communication part between the liquid inlet 72 and the liquid mixing cavity 71 is provided with an accelerating small hole 74, the cross-sectional area of the small hole is smaller than that of the liquid mixing cavity 71 and the liquid inlet 72, the mixed liquid mixed with the foaming agent is sprayed out of high-speed water flow after passing through the accelerating small hole 74, a venturi effect is generated in the liquid mixing cavity 71, air is sucked in under negative pressure, the air and the mixed liquid are mixed, and foam is generated after passing through the foaming net 23.

Referring to fig. 1 and fig. 7 to fig. 12, preferably, a diaphragm 8 is disposed between the compression chamber 3 and the liquid-pumping chamber 1, and after the pressure source is turned on, the diaphragm 8 moves in a first direction under the pressure action of the compression chamber 3, so as to compress the liquid-pumping chamber 1 to supply liquid to the liquid-outlet channel 2; the body further comprises a liquid storage cavity 16 communicated with the liquid suction cavity 1, when the diaphragm 8 moves towards the second direction, the liquid suction cavity 1 expands and generates negative pressure, and the liquid suction cavity 1 sucks foaming agent in the liquid storage cavity 16 under the action of the negative pressure. The liquid storage cavity is used for containing foaming agent, the liquid adding pipe 21 is communicated with the liquid storage cavity 16, and the foaming agent is supplemented to the liquid storage cavity 16 through the liquid adding pipe 21. The preferred first direction is downward movement, the second direction is upward movement opposite to the first direction, the compression cavity 3 is driven by the fluid pressure input by the input channel 4 to move the diaphragm 8 arranged between the compression cavity 3 and the liquid pumping cavity 1 downward to the liquid pumping cavity 1, so that the volume of the liquid pumping cavity 1 is reduced and the pressure is increased, and then the foaming agent in the liquid pumping cavity 1 is extruded into the mixing unit 6 through the liquid outlet channel 2; when the membrane 8 is reset and moves upwards, the liquid suction cavity 1 is enlarged to generate negative pressure to suck the liquid in the liquid inlet channel 10 into the liquid suction cavity 1 for the next extrusion into the mixing unit 6. The pressure source is a water supply unit, the output channel 4 is a water inlet channel, and the output channel 5 is a water outlet channel. The water supply unit is with the rivers entering compression chamber 3, be equipped with in the adapter 51 on the output channel 5 and hold down pressure aperture 53, and input channel 4 size is greater than output channel 5 hold down the size of pressure aperture 53 for most gas is held down in compression chamber 3, and then increases the pressure in the compression chamber 3, makes it can drive diaphragm 8 and moves down, compresses the drawing liquid chamber 1 and extrudes the foaming agent, and the remaining part rivers enter into mixing unit 6, mixes with the foaming agent that drawing liquid chamber 1 crowded into.

Referring to fig. 7, 8 and 10 to 12, it is preferable that the device further includes an elastic member 11 for providing an elastic force to the diaphragm 8, and the diaphragm 8 moves in the second direction under the elastic force. When the pressure source stops providing pressure to the membrane 8, the elastic piece 11 can drive the membrane 8 to reset towards the second direction, so that the volume of the liquid suction cavity 1 is increased, and the negative pressure is realized to suck foaming agent from the liquid inlet channel 10. The elastic member 11 may preferably be a spring.

Referring to fig. 7, 8 and 10, the liquid suction device preferably further includes a liquid inlet check valve 12 and a liquid outlet check valve 13, the liquid storage cavity 16 is communicated with the liquid suction cavity 1 through a liquid inlet channel 10, the liquid inlet check valve 12 is disposed in the liquid inlet channel 10 and is used for controlling the opening and closing of the liquid inlet channel 10, the liquid inlet check valve 12 closes the liquid inlet channel 10 in normal state, when the diaphragm 8 moves towards the second direction, the liquid inlet check valve 12 opens the liquid inlet channel 10 under the negative pressure action of the liquid suction cavity 1, and at this time, the liquid outlet check valve 13 of the liquid outlet channel 2 closes the liquid outlet channel 2, so that the foaming agent in the liquid storage cavity 16 can be sucked into the liquid suction cavity 1; the liquid outlet one-way valve 13 is arranged in the liquid outlet channel 2 and is used for controlling the opening and closing of the liquid outlet channel 2. Normally, the liquid outlet one-way valve 13 closes the liquid outlet channel 2, after the pressure source is opened, the liquid outlet one-way valve 13 opens the liquid outlet channel 2 under the pressure action of the liquid suction cavity 1, and at this time, the liquid inlet one-way valve 12 of the liquid inlet channel 10 is pressed to close the liquid inlet channel 10, so that the liquid in the liquid suction cavity 1 can only be extruded from the liquid outlet channel 2 into the mixing unit 6.

Referring to fig. 1 to 6, preferably, the mixed liquor output channel 62 is further provided with an anti-siphon unit 14, the anti-siphon unit 14 is disposed on a side wall of the water tank 9, and the anti-siphon unit 14 includes an air inlet 147 communicating with the mixed liquor output channel 62. The anti-siphon unit 14 comprises an anti-siphon pipe 141 and an anti-siphon plug 142, wherein a water drain 143 is arranged at the top of the anti-siphon pipe 141, a first inlet 144 is arranged at the bottom of the anti-siphon pipe 141, and a first outlet 145 is arranged on the side wall of the anti-siphon pipe 141; the anti-siphon plug 142 is disposed in the anti-siphon pipe 141, and is movable between the first inlet 144 and the drain port 143, for controlling the opening and closing of the drain port 143; the first inlet 144 is connected to the mixed liquor output channel through a mixed liquor outlet pipe, and the first outlet 145 is connected to the liquid inlet 72. The anti-siphon unit 14 further comprises an air tap 146, an air inlet 147 is arranged at the upper end of the air tap 146, the lower end of the air tap 146 is connected with the air suction port 73, an overflow groove 148 is connected to the air inlet 147, and the overflow groove 148 is connected to the water tank 9. When the foam shield function is started, water flow enters the anti-siphon pipe 141 from the first inlet 144 to jack up the anti-siphon plug 142, a sealing gasket on the anti-siphon plug 142 closes the water drain 143, and the water flow flows out from the first outlet 145 and flows to the self-priming nozzle 7 through a mixed liquid outlet pipe; when the foam shield function is closed, the anti-siphon plug 142 falls back under the action of gravity, and external air enters from the water drain 143 to cut off water flow, so that water flow in the water tank 9 is prevented from continuously losing due to siphon. The drain connector at the drain port 143 can extend into the water tank 9 or be connected to the drain valve overflow pipe by a hose, when the sealing gasket on the anti-siphon plug 142 cannot completely close the drain port 143, a small amount of water flow can flow back into the water tank 9 or into the drain valve overflow pipe or into the air inlet 147 and then be sucked back into the self-priming nozzle 7, preventing the drain from flowing to the floor. The anti-siphon unit 14 is provided with an air tap 146, and is connected with the self-priming nozzle 7 through an air suction pipe 24, and air enters from an air inlet 147 when the foam shield works and then provides foaming air for the self-priming nozzle 7 through the air tap 146. An overflow groove 148 is arranged at the air inlet 147, and when water in the toilet overflows from the air inlet 147 due to special conditions, the water can be led into the water tank 9 through the overflow groove 148 to prevent the water from overflowing to the floor.

Referring to fig. 1, 7, 8 and 11, preferably, the inner cavity of the liquid storage bottle 27 forms the liquid storage cavity 16, the liquid storage bottle 27 is provided with a liquid storage bottle cap 20, the sealing cap 18 is arranged on the liquid storage bottle cap 20, the liquid storage bottle cap 20 is provided with a liquid filling opening 19 communicated with the liquid storage cavity 16 for filling foaming agent into the liquid storage cavity 16, and the liquid filling pipe 21 is connected into the liquid storage cavity 16 through the liquid filling opening 19.

The utility model has the following working principle:

when the foam shield function is started, the water pump 17 pumps water from the water tank 9 (or the electromagnetic valve supplies water, see fig. 14; or the water supply of the single water pump 17 is changed into the water supply of a toilet flushing system (the water pump 17 and a switching valve system), see fig. 15), the water pumped by the water pump is input into the input channel 4 through the water pumping pipe 25 and enters the compression cavity 3 in the sealing cover, and under the action of the pressure-holding small hole 53 of the adapter 51 of the output channel 5, larger water pressure is generated in the compression cavity 3;

then, water pressure acts on the diaphragm 8, downward force is generated on the diaphragm 8 to drive the diaphragm 8 to move downwards (the elastic piece 11 is compressed), the volume of the liquid suction cavity 1 is compressed, positive pressure is generated in the liquid suction cavity 1, the liquid outlet one-way valve 13 is opened by the positive pressure, and foaming agent in the liquid suction cavity 1 is supplied to the mixing cavity 61 of the mixing unit 6 through the liquid outlet channel 2;

the water drives the diaphragm 8 to act and enter the mixing cavity 61 of the mixing unit 6 through the output channel 5 (which is formed by the adapter 51 and the mixing cavity body 52), after being fully mixed and diluted in the mixing cavity 61, the water and the foaming agent flow out of the mixed liquid output channel 62 of the mixing unit 6, are introduced into the liquid inlet 72 of the self-priming nozzle 7 through the first inlet 144 and the first outlet 145 of the anti-siphon unit 14, the mixed liquid mixed with the foaming agent is sprayed with high-speed water flow through the accelerating small holes 74, venturi effect is generated in the mixing cavity 71, air is sucked in under negative pressure, the air is mixed with foaming solution, foam is generated after passing through the foaming net 23, and the foam is discharged through the foam outlet 75; and then ejected from the bubble out channel 222 of the brush ring channel 22 into the toilet bowl water seal surface.

Referring to fig. 13 to 15, after the water pump 17 (or the electromagnetic valve, or the toilet flushing system) stops working, the water pressure in the compression chamber 3 disappears, the diaphragm 8 is driven to reset under the action of the elastic force of the elastic member 11 (spring), at this time, the volume of the liquid pumping chamber 1 is increased, negative pressure is generated in the liquid pumping chamber 1, the liquid inlet one-way valve 12 is opened by the negative pressure, and the foaming agent in the liquid storage chamber 16 can be sucked into the liquid pumping chamber 1 through the liquid inlet channel 10 so as to prepare for supplying the foaming agent to the mixing chamber when the foam shield function is started next time.

The points to be described are: first, in the description of the present application, it should be noted that, unless otherwise specified and defined, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be mechanical or electrical, or may be a direct connection between two elements, and "upper," "lower," "left," "right," etc. are merely used to indicate relative positional relationships, which may be changed when the absolute position of the object being described is changed.

Secondly: in the drawings of the disclosed embodiments, only the structures related to the embodiments of the present disclosure are referred to, and other structures may refer to the general design, so that the same embodiment and different embodiments of the present disclosure may be combined with each other without conflict.

Finally, the above description is only a preferred embodiment of the present utility model, and the scope of the present utility model is not limited to the above examples, but all technical solutions belonging to the concept of the present utility model are within the scope of the present utility model.

It should be noted that modifications and adaptations to the present utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims (13)

1. The utility model provides a foam shield device, includes the body, this internal liquid suction cavity and with the liquid outlet channel that liquid suction cavity is linked together, its characterized in that: further comprises:

the pressure source comprises an input channel, a compression cavity and an output channel, wherein the input channel is connected with fluid, and the compression cavity is used for providing pressure for the liquid suction cavity;

the liquid outlet channel is connected to the mixing unit, and the liquid pumping cavity is used for supplying foaming agent to the mixing unit through the liquid outlet channel under the action of the compression cavity; the output channel is connected with the mixing unit and is used for providing fluid for foaming for the mixing unit; the mixing unit is provided with a mixed liquid output channel for outputting mixed liquid of foaming agent and fluid;

the self-priming spray head comprises a mixing cavity, wherein the mixing cavity is provided with a foam outlet and a liquid inlet communicated with the mixed liquid output channel, the mixing cavity is also provided with an air suction port communicated with the outside atmosphere, and negative pressure is generated in the flowing process of the mixed liquid by the air suction port to suck air.

2. A foam shield assembly according to claim 1, wherein: the pressure source also comprises a water tank and a water pump communicated with the water tank and the input channel.

3. A foam shield assembly according to claim 2, wherein: the mixing unit is arranged below the water tank.

4. A foam shield assembly according to claim 2, wherein: one side of the water tank is also provided with a liquid adding drawer, the body is also provided with a liquid storage cavity for supplying liquid to the liquid pumping cavity, and a liquid adding pipe is arranged between the liquid adding drawer and the liquid storage cavity.

5. A foam shield assembly according to claim 1, wherein: the pressure source also includes a solenoid valve in communication with the water supply source, the solenoid valve supplying water to the input channel.

6. A foam shield assembly according to claim 1, wherein: the pressure source also comprises a water supply mechanism and a flow divider, and the water inlet end of the flow divider is communicated with the water supply mechanism; the first water outlet end of the flow divider is communicated with the input channel; the second water outlet end of the diverter is communicated with one or more of a main flushing waterway, a brushing ring waterway and a buttocks and women washing waterway; or the second water outlet end of the flow divider is communicated with the main flushing path, and the third water outlet end of the flow divider is communicated with the water path of the brush ring; or the second water outlet end of the diverter is communicated with the main flushing path, the third water outlet end of the diverter is communicated with the water path of the brush ring, and the fourth water outlet end of the diverter is communicated with the buttocks and women washing path.

7. A foam shield assembly according to claim 1, wherein: the closestool is provided with a brush ring pipeline forming a brush ring waterway, and the self-priming spray head is integrated on the brush ring pipeline.

8. A foam shield assembly according to claim 1, wherein: a diaphragm is arranged between the compression cavity and the liquid suction cavity, and after the pressure source is started, the diaphragm moves to a first direction under the pressure action of the compression cavity, so that the liquid suction cavity is compressed to supply liquid to the liquid outlet channel; the body also comprises a liquid storage cavity communicated with the liquid suction cavity, when the diaphragm moves towards the second direction, the liquid suction cavity expands and generates negative pressure, and the liquid suction cavity sucks foaming agent in the liquid storage cavity under the action of the negative pressure.

9. A foam shield assembly according to claim 8, wherein: the elastic piece is used for providing elastic force for the diaphragm, and the diaphragm moves towards the second direction under the action of the elastic force.

10. A foam shield assembly according to claim 8, wherein: the liquid suction cavity is provided with a liquid suction channel and a liquid storage cavity, and the liquid suction channel is communicated with the liquid suction cavity; the liquid outlet one-way valve is arranged in the liquid outlet channel and used for controlling the opening and closing of the liquid outlet channel; when the diaphragm moves to the first direction to compress the liquid pumping cavity, the liquid inlet one-way valve is closed, and the liquid outlet one-way valve is opened; when the diaphragm moves to the second direction to expand the liquid pumping cavity, the liquid inlet one-way valve is opened, and the liquid outlet one-way valve is closed.

11. A foam shield assembly according to claim 2, wherein: the anti-siphon unit is arranged on the side wall of the water tank and comprises an air inlet communicated with the mixed liquid output channel.

12. A foam shield assembly according to claim 11, wherein: the anti-siphon unit comprises an anti-siphon pipe and an anti-siphon plug, the top of the anti-siphon pipe is provided with a water drain communicated with the air inlet, the bottom of the anti-siphon pipe is provided with a first inlet, and the side wall of the anti-siphon pipe is provided with a first outlet; the siphon-proof plug is arranged in the siphon-proof pipe, is positioned between the first inlet and the water drain port and is used for controlling the opening and closing of the water drain port; the first inlet is connected with the mixed liquid output channel, the first outlet is connected with the liquid inlet of the self-priming spray head, the mixed liquid self-priming spray head further comprises a water draining joint communicated with the water draining port, and the outlet of the water draining joint is connected with the water tank or the air inlet.

13. A foam shield assembly according to claim 11, wherein: the anti-siphon unit further comprises an air nozzle, the air inlet is arranged at the upper end of the air nozzle, the lower end of the air nozzle is connected with the air suction port of the self-suction nozzle, the air inlet is connected with an overflow groove, and the overflow groove is connected with the water tank.