A top liquid-supplementing foam generator

Abstract

The application discloses a top-supplementing liquid type foam generating device, which comprises a liquid storage cavity, a liquid supplementing cavity, a gas mixing cavity and a gas pressure balancing mechanism, a gas suction port for sucking gas from the liquid supplementing cavity is arranged at the top of the liquid supplementing cavity, and the liquid supplementing cavity is communicated with the liquid storage cavity through a liquid supplementing channel; the top of the gas mixing cavity is provided with a foam generating nozzle and a gas supply port for supplying gas to the gas mixing cavity, the bottom of the gas mixing cavity is communicated with the liquid supplementing cavity through a one-way liquid supplementing valve, the foam generating nozzle is provided with a liquid outlet channel extending downwards to the bottom of the gas mixing cavity, a gas outlet channel communicated with a gas cavity above the liquid surface in the gas mixing cavity, and a mixing channel communicated with the liquid outlet channel and the gas outlet channel, and the gas pressure balancing mechanism is used for balancing the pressure between the liquid supplementing cavity and the gas mixing cavity. The liquid supplementing, gas supply and pressurizing, high-pressure forming, foam generating and discharging are realized through vacuum suction and the gas pressure balancing mechanism, so that the device can be used in a large capacity and the liquid supplementing is not needed frequently.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of bathroom products, in particular to a foam generating device with liquid supplementing on top. BACKGROUND

[0002] At present, foam dispensers are generally used in the market to realize the spraying of shower gel, shampoo or hand sanitizer. However, the existing foam dispensers generally realize the spraying of liquid and the generation of foam by mechanical pressing of a manual foam pump or an electric foam pump. The liquid generally passes through the pump body. With the long use time, the pump body is prone to blockage and corrosion and damage by the foam soap. In order to quickly pump out the soap in the form of foam, a small liquid storage cavity is generally used to store the soap. Therefore, the liquid needs to be frequently supplemented during use. Some foam dispensers realize the spraying of soap and the supplement of liquid by two pump bodies. However, this method has a complex structure and high cost. SUMMARY

[0003] The present application aims to provide a foam generating device with liquid supplementing on top to solve one or more technical problems in the prior art and at least provide a beneficial option or create conditions.

[0004] The technical scheme adopted to solve the above technical problems is as follows:

[0005] The present application provides a foam generating device with liquid supplementing on top, which comprises a liquid storage cavity, a liquid supplementing cavity, a gas mixing cavity and a gas pressure balancing mechanism. The top of the liquid supplementing cavity is provided with a gas suction port for suctioning the liquid supplementing cavity. The liquid supplementing cavity is communicated with the liquid storage cavity through a liquid supplementing channel. The top of the gas mixing cavity is provided with a foam generating nozzle and a gas supply port for supplying gas to the gas mixing cavity. The bottom of the gas mixing cavity is communicated with the liquid supplementing cavity through a one-way liquid supplementing valve. The foam generating nozzle is provided with a liquid outlet channel extending downward to the bottom of the gas mixing cavity, a gas outlet channel communicated with a gas cavity above the liquid surface in the gas mixing cavity, and a mixing channel communicated with the liquid outlet channel and the gas outlet channel. The gas pressure balancing mechanism is used to balance the pressure between the liquid supplementing cavity and the gas mixing cavity.

[0006] The beneficial effects of the present application are as follows. During use, the soap is stored in the liquid storage cavity. First, the inside of the liquid supplementing cavity is suctioned through the gas suction port to form a negative pressure in the liquid supplementing cavity. The liquid in the liquid storage cavity is sucked into the liquid supplementing cavity. The liquid in the liquid supplementing cavity is supplemented into the gas mixing cavity through the one-way liquid supplementing valve. When the foam needs to be sprayed, the gas is supplied to the gas mixing cavity through the gas supply port to form a high pressure in the gas mixing cavity. The soap in the gas mixing cavity is pressed into the mixing channel from the liquid outlet channel. At the same time, the gas in the gas mixing cavity is also pressed into the mixing channel from the gas outlet channel. The gas and the soap are mixed in the mixing channel to form foam, which is sprayed from the mixing channel together, realizing the spraying of foam.

[0007] When the soap solution in the air mixing cavity is sprayed out, the soap solution in the air mixing cavity will decrease, and after the liquid level of the soap solution in the air mixing cavity is lowered, or when the liquid supplement cavity is vacuumized to form negative pressure, the liquid in the liquid storage cavity is sucked into the liquid supplement cavity, and after the liquid level of the soap solution in the liquid supplement cavity is raised, the pressure between the air mixing cavity and the liquid supplement cavity is balanced through the air pressure balancing mechanism, the liquid in the liquid supplement cavity is supplied into the air mixing cavity through the one-way liquid supplement valve until the liquid levels of the air mixing cavity and the liquid supplement cavity are consistent; the foam generating device realizes liquid supplement, air supply and pressurization to form high pressure through vacuumization and the air pressure balancing mechanism to realize foam generation and spraying, thereby realizing large capacity use without frequent liquid supplement.

[0008] As a further improvement of the above technical solution, the pump body module is provided with an air inlet end connected with the air outlet and an air outlet end connected with the air inlet.

[0009] The pump body module is provided to simultaneously perform vacuumization and air supply pressurization, and through analysis of the working principle of the air pump, it is known that the function of a general pressurized air pump is to pressurize low-pressure gas to form high-pressure gas, that is, the pump body module can have low-pressure air inlet and high-pressure air outlet, the low-pressure air inlet is the principle of vacuumization, and the high-pressure air outlet is the principle of pressurized air supply, and the air inlet end of the pump body module is connected with the air outlet, and the air outlet end is connected with the air inlet, so that when the pump body module operates, vacuumization of the liquid supplement cavity and pressurization of the air mixing cavity can be realized at the same time, that is, liquid supplement and foam generation and spraying are realized at the same time, thereby saving cost.

[0010] As a further improvement of the above technical solution, the pump body module is an electric air pump.

[0011] The pump body module in the present solution can adopt an electric air pump to realize automatic control.

[0012] As a further improvement of the above technical solution, the pump body module is a manual air pump, and the air inlet end and the air outlet end of the manual air pump are each provided with a one-way air valve.

[0013] The pump body module in the present solution adopts a manual air pump, which is generally a gas bag pump structure, and two one-way air valves are used to control air inlet and outlet, so that when the air pump is pressed, the gas in the air pump can only be discharged from the air outlet end; when the air pump is reset, the gas can only be introduced from the air inlet end.

[0014] As a further improvement of the above technical solution, the air pressure balancing mechanism includes a first air pressure balancing component arranged at the top of the liquid supplement cavity and a second air pressure balancing component arranged at the top of the air mixing cavity, the first air pressure balancing component is used to balance the air pressure between the liquid supplement cavity and the outside, and the second air pressure balancing component is used to balance the air pressure between the air mixing cavity and the outside.

[0015] The first air pressure balancing assembly balances the air pressure between the liquid supplementing tank cavity and the outside, and the second air pressure balancing assembly balances the air pressure between the gas mixing tank cavity and the outside, so that the air pressure between the liquid supplementing tank cavity and the gas mixing tank cavity is balanced.

[0016] When the internal air pressure suddenly increases, the air pressure balancing assembly can close the air passage or the gas overflow amount can be negligible; when the internal pressure is no longer increased, the air pressure balancing assembly communicates the inside and the outside to balance the air pressure between the inside and the outside.

[0017] The air pressure balancing assembly can be a solenoid valve, a microporous membrane, or a series of flow control devices, and the present application will not be described in detail.

[0018] As a further improvement of the above technical solution, the liquid supplementing channel has a liquid supplementing outlet end arranged in the liquid supplementing tank cavity and a liquid supplementing inlet end arranged in the liquid storage tank cavity, and the one-way liquid supplementing valve is lower than the horizontal height of the liquid supplementing outlet end.

[0019] When the internal air pressure of the liquid supplementing tank cavity is negative, the soap solution in the liquid storage tank cavity enters the liquid supplementing channel through the liquid supplementing inlet end, and then flows from the liquid supplementing outlet end to the liquid supplementing tank cavity. When the air pressure of the liquid supplementing tank cavity and the gas mixing tank cavity is balanced with the atmospheric pressure, the liquid level in the liquid supplementing tank cavity is level with the liquid supplementing outlet end, and the internal part of the gas mixing tank cavity is supplemented to a state level with the liquid level of the liquid supplementing tank cavity, and the liquid supplementing tank cavity is supplemented to the gas mixing tank cavity by atmospheric pressure.

[0020] As a further improvement of the above technical solution, the foam generating nozzle comprises a sleeving groove arranged in the top of the gas mixing tank cavity, a hollow sleeving piece arranged in the sleeving groove, a mixing channel arranged at the top of the sleeving groove and communicated with the sleeving groove, an air outlet channel formed between the outer wall of the sleeving piece and the inner wall of the sleeving groove, and a liquid outlet pipe arranged in the sleeving piece and extending downward to the bottom of the gas mixing tank cavity, and a liquid outlet channel formed in the liquid outlet pipe.

[0021] As a further improvement of the above technical solution, a foam refining unit is further arranged, and the foam refining unit is connected with the outlet of the mixing channel through a pipeline.

[0022] The present application further provides a foam refining unit for refining the mixture of the soap solution and the gas.

[0023] As a further improvement of the above technical solution, the one-way liquid supplementing valve comprises an umbrella-shaped valve core, a liquid supplementing through hole arranged in the bottom of the gas mixing tank cavity, and a guide hole, the umbrella-shaped valve core comprises a valve cap and a valve rod, the valve rod is slidably connected with the guide hole, the liquid supplementing through hole is arranged below the valve cap, the liquid supplementing through hole is communicated with the liquid supplementing tank cavity, the number of the liquid supplementing through holes is multiple, and the multiple liquid supplementing through holes are arranged in a ring shape around the axis of the valve rod.

[0024] The one-way liquid supplementing valve in the scheme is realized by the structure of the umbrella-shaped valve core, wherein the valve rod is in sliding fit with the guide hole, in the free state, the umbrella-shaped valve core moves downward by relying on its own gravity and water pressure, at this time, the valve cap blocks the liquid supplementing through hole, and when supplementing liquid, the liquid pushes the umbrella-shaped valve core upward, at this time, the valve cap opens the liquid supplementing through hole, and the lower end of the valve rod is provided with a limiting protrusion, so that the umbrella-shaped valve core can be prevented from being separated from the guide hole. The plurality of liquid supplementing through holes can improve the liquid supply speed.

[0025] The one-way liquid supplementing valve can also be a fluid control device such as a solenoid valve and a one-way valve.

[0026] As a further improvement of the above technical scheme, the bottle mouth is arranged on the top of the liquid storage bottle, the liquid supplementing groove body and the gas mixing groove body, the liquid storage groove cavity is arranged in the liquid storage bottle, the liquid supplementing groove body is detachably arranged on the bottle mouth of the liquid storage bottle, the gas mixing groove body is detachably arranged in the liquid supplementing groove body, the liquid supplementing channel comprises a liquid supplementing pipe arranged at the bottom of the liquid supplementing groove body and a liquid suction pipe connected with the lower end of the liquid supplementing pipe, and the upper end of the liquid supplementing pipe extends to the upper part of the liquid supplementing groove cavity.

[0027] The liquid storage bottle in the scheme is arranged in an upper position, the liquid storage bottle can store a large amount of soap liquid, and the liquid supplementing groove body and the gas mixing groove body are both arranged in a detachable structure, so that the interior can be conveniently maintained and cleaned. BRIEF DESCRIPTION OF DRAWINGS

[0028] The application will be further described below in combination with the drawings and embodiments.

[0029] Figure 1 is a schematic view of an embodiment of the foam generating device provided by the application when an electric air pump is used;

[0030] Figure 2 is a partial enlarged view of part A in Figure 1

[0031] Figure 3 is a partial enlarged view of part B in Figure 1

[0032] Figure 4 is a schematic view of an embodiment of the foam generating device provided by the application when a manual air pump is used. DETAILED DESCRIPTION

[0033] This part will describe the specific embodiments of the application in detail, the preferred embodiments of the application are shown in the drawings, the drawings are used to supplement the description in the text part of the description, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the application, but it cannot be understood as a limitation on the protection scope of the application.

[0034] ​​In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by the upper, lower, front, rear, left, right and the like, is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0035] In the description of the present application, if the word "several" or the like is described, it means one or more, the meaning of more than two, greater than, less than, more than, etc. is not included in the number, and the above, below, within, etc. is understood to include the number.

[0036] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting and the like should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0037] Referring to Figures 1-4 The top liquid supplementing type foam generating device of the present application is made as follows:

[0038] The top liquid supplementing type foam generating device of the present application is made as follows:

[0039] The top of the liquid supplementing tank cavity 200 is provided with a gas suction port 210, and the liquid supplementing tank cavity 200 can be vacuumized through the gas suction port 210, so that the liquid supplementing tank cavity 200 forms a negative pressure.

[0040] The liquid supplementing tank cavity 200 is communicated with the liquid storage tank cavity 100 through a liquid supplementing channel.

[0041] The top of the gas mixing tank cavity 300 of the present embodiment is provided with a foam generating nozzle 310 and a gas supply port 320, and the gas mixing tank cavity 300 can be pressurized by gas supply through the gas supply port 320, so that the gas mixing tank cavity 300 forms a high pressure.

[0042] The bottom of the gas mixing tank cavity 300 is communicated with the liquid supplementing tank cavity 200 through a one-way liquid supplementing valve 330, and the communication direction of the one-way liquid supplementing valve 330 is from the liquid supplementing tank cavity 200 to the gas mixing tank cavity 300.

[0043] The foam generating nozzle 310 is provided with a liquid outlet channel 311 extending downward to the bottom of the air mixing groove 300, an air outlet channel 312 communicating with the air cavity above the liquid level in the air mixing groove 300, and a mixing channel 313 communicating with the outlets of the liquid outlet channel 311 and the air outlet channel 312. In use, the lower end of the liquid outlet channel 311 is arranged below the liquid level of the soap solution in the air mixing groove 300, and the inlet of the air outlet channel 312 is arranged above the liquid level of the soap solution in the air mixing groove 300.

[0044] The air pressure balancing mechanism is used to balance the air pressure between the liquid supplementing groove 200 and the air mixing groove 300.

[0045] The air pressure balancing mechanism of the embodiment includes a first air pressure balancing component 220 arranged at the top of the liquid supplementing groove 200 and a second air pressure balancing component 340 arranged at the top of the air mixing groove 300. The first air pressure balancing component 220 is used to balance the air pressure between the liquid supplementing groove 200 and the outside, and the second air pressure balancing component 340 is used to balance the air pressure between the air mixing groove 300 and the outside.

[0046] The first air pressure balancing component 220 is used to balance the air pressure between the liquid supplementing groove 200 and the outside, and the second air pressure balancing component 340 is used to balance the air pressure between the air mixing groove 300 and the outside, so as to balance the air pressure between the liquid supplementing groove 200 and the air mixing groove 300.

[0047] When the internal air pressure suddenly increases, the air pressure balancing component can close the air vent channel or the amount of gas overflow can be negligible; when the internal pressure no longer increases, the air pressure balancing component makes the inside and the outside communicate to balance the air pressure inside and outside.

[0048] The air pressure balancing component can be a solenoid valve, a microporous membrane, or a series of flow control devices, which will not be described in detail.

[0049] In use, the soap solution is stored in the liquid storage groove 100. First, the inside of the liquid supplementing groove 200 is vacuumized through the air suction port 210, so that a negative pressure is formed in the liquid supplementing groove 200, and the liquid in the liquid storage groove 100 is sucked into the liquid supplementing groove 200. The liquid in the liquid supplementing groove 200 is supplemented into the air mixing groove 300 through the one-way liquid supplementing valve 330. When it is needed to spray foam, air is supplied into the air mixing groove 300 through the air supply port 320 to pressurize the air mixing groove 300, so that the soap solution in the air mixing groove 300 enters the mixing channel 313 from the liquid outlet channel 311 under the action of the pressure, and the gas in the air mixing groove 300 also enters the mixing channel 313 from the air outlet channel 312 under the action of the pressure. After the gas and the soap solution are mixed in the mixing channel 313 to form foam, the foam is sprayed out from the mixing channel 313, so as to realize the spraying of the foam.

[0050] When the soap solution in the mixing groove cavity 300 is sprayed out, the soap solution in the mixing groove cavity 300 will decrease, and after the liquid level of the soap solution in the mixing groove cavity 300 is lowered, or when the liquid supplement groove cavity 200 is vacuumized to form negative pressure, the liquid in the liquid storage groove cavity 100 is sucked into the liquid supplement groove cavity 200, and after the liquid level of the soap solution in the liquid supplement groove cavity 200 is raised, the pressure between the mixing groove cavity 300 and the liquid supplement groove cavity 200 is balanced through the air pressure balancing mechanism, and then the liquid in the liquid supplement groove cavity 200 is supplied into the mixing groove cavity 300 through the one-way liquid supplement valve 330 until the liquid level of the mixing groove cavity 300 and the liquid supplement groove cavity 200 is consistent; the foam generating device realizes liquid supplement, air supply and pressurization to form high pressure through vacuumization and air pressure balancing mechanism to realize foam generation and spraying, so that large capacity use is realized without frequent liquid supplement.

[0051] And the liquid supplement channel has a liquid supplement outlet end 230 arranged in the liquid supplement groove cavity 200 and a liquid supplement inlet end 240 arranged in the liquid storage groove cavity 100, and the one-way liquid supplement valve 330 is lower than the liquid supplement outlet end 230.

[0052] When the liquid supplement groove cavity 200 is under negative pressure, the soap solution in the liquid storage groove cavity 100 enters the liquid supplement channel through the liquid supplement inlet end 240, and then flows into the liquid supplement groove cavity 200 from the liquid supplement outlet end 230, and when the air pressure of the liquid supplement groove cavity 200 and the mixing groove cavity 300 is balanced with the outside air pressure, the liquid level in the liquid supplement groove cavity 200 is leveled with the liquid supplement outlet end 230, and the mixing groove cavity 300 is supplemented to the state of being leveled with the liquid supplement groove cavity 200, and the liquid supplement of the liquid supplement groove cavity 200 to the mixing groove cavity 300 is realized by atmospheric pressure.

[0053] And the pump body module is provided with an air inlet end connected with the air suction port 210 and an air outlet end connected with the air supply port 320, and the pump body module is arranged to simultaneously perform vacuumization and air supply pressurization in this embodiment. According to the working principle of the air pump, the function of a general pressurizing air pump is to pressurize low-pressure gas to form high-pressure gas, that is, the pump body module can have low-pressure air inlet and high-pressure air outlet. The low-pressure air inlet is the principle of vacuumization, and the high-pressure air outlet is the principle of pressurized air supply. In this embodiment, the air inlet end of the pump body module is connected to the air suction port 210, and the air outlet end is connected to the air supply port 320. When the pump body module is running, the vacuumization of the liquid supplement groove cavity 200 and the pressurization of the mixing groove cavity 300 can be realized at the same time.

[0054] The pump body module can adopt an electric air pump 400 to realize automatic control, as shown in Figure 1 .

[0055] When the electric air pump 400 works, the negative pressure is formed in the liquid supplement tank cavity 200, and the high pressure is formed in the gas mixing tank cavity 300; under the influence of the negative pressure, the liquid in the liquid storage tank cavity 100 is sucked into the liquid supplement tank cavity 200; under the influence of the high pressure, the liquid and gas in the gas mixing tank cavity 300 are mixed and pressed out to form the foam.

[0056] When the liquid surface in the liquid supplement tank cavity 200 is higher than the liquid supplement outlet end 230, after the air pump stops, due to the action of the first air pressure balance component 220 of the liquid supplement tank cavity 200, the liquid in the liquid supplement tank cavity 200 will flow back to the liquid supplement tank cavity 200 until the liquid surface is level with the liquid supplement outlet end 230, and at the same time, in this process, under the action of the second air pressure balance component 340, the atmospheric pressure is balanced, so that the liquid surfaces of the gas mixing tank cavity 300 and the liquid supplement tank cavity 200 are level with the liquid supplement outlet end 230.

[0057] As shown in Figure 4 , the pump body module can adopt a manual air pump 500, which is generally a gas bag pump structure, and two one-way air valves 510 are used to control the air inlet and outlet, so that when the air pump is pressed, the gas in the air pump can only be discharged from the air outlet end; when the air pump is reset, the gas can only be inhaled from the air inlet end.

[0058] Specifically: as shown in Figure 4 , the foam generating nozzle 310 includes a sleeve groove 314 arranged at the top of the gas mixing tank cavity 300, a sleeve piece 315 arranged in the sleeve groove 314, the mixing channel 313 is arranged at the top of the sleeve groove 314 and communicates with the sleeve groove 314, the air outlet channel 312 is formed between the outer wall of the sleeve piece 315 and the inner wall of the sleeve groove 314, the sleeve piece 315 is provided with a liquid outlet pipe 316 extending downward to the bottom of the gas mixing tank cavity 300, and the liquid outlet channel 311 is formed in the liquid outlet pipe 316.

[0059] The embodiment also includes a foam refining unit 600 connected with the outlet of the mixing channel 313 through a pipeline, and the foam refining unit 600 is arranged to refine the foam of the mixture of the soap liquid and the gas.

[0060] As shown in Figure 3 , the one-way liquid supplement valve 330 includes an umbrella-shaped valve core 331, a liquid supplement through hole 332 and a guide hole 333 arranged at the bottom of the gas mixing tank cavity 300, the umbrella-shaped valve core 331 includes a valve cap 334 and a valve rod 335, the valve rod 335 is in sliding fit with the guide hole 333, the liquid supplement through hole 332 is arranged below the valve cap 334, the liquid supplement through hole 332 communicates with the liquid supplement tank cavity 200, and the number of the liquid supplement through holes 332 is multiple, and the multiple liquid supplement through holes 332 are arranged in a ring shape around the axis of the valve rod 335.

[0061] The one-way liquid supplement valve 330 of the embodiment is realized by the structure of the umbrella-shaped valve core 331, wherein the valve rod 335 is in sliding fit with the guide hole 333, in the free state, the umbrella-shaped valve core 331 moves downward by its own gravity and water pressure, at this time, the valve cover 334 blocks the liquid supplement through hole 332, and when liquid supplement is carried out, the liquid pushes the umbrella-shaped valve core 331 upward, at this time, the valve cover 334 opens the liquid supplement through hole 332, wherein the lower end of the valve rod 335 is provided with a limiting protrusion, which can avoid the umbrella-shaped valve core 331 from being separated from the guide hole 333. The plurality of liquid supplement through holes 332 can improve the liquid supply speed.

[0062] In other embodiments, the one-way liquid supplement valve 330 can also be a fluid control device such as a solenoid valve, a one-way valve, etc.

[0063] Further, the embodiment further includes the liquid storage bottle 700 with the bottle opening at the top, the liquid supplement tank body 800, and the gas mixing tank body 900, the liquid storage tank cavity 100 is located in the liquid storage bottle 700, the liquid supplement tank cavity 200 is arranged in the liquid supplement tank body 800, and the gas mixing tank cavity 300 is arranged in the gas mixing tank body 900.

[0064] The liquid supplement tank body 800 can be detachably installed on the bottle opening of the liquid storage bottle 700, the gas mixing tank body 900 can be detachably sleeved in the liquid supplement tank body 800, and the liquid supplement channel includes the liquid supplement pipe 250 arranged at the bottom of the liquid supplement tank body 800 and the liquid suction pipe 260 connected with the lower end of the liquid supplement pipe 250, the upper end of the liquid supplement pipe 250 extends upward to the upper part of the liquid supplement tank cavity 200.

[0065] The liquid storage bottle 700 in the embodiment is of the top-mounted type, the liquid storage bottle 700 can realize storage of large-capacity soap liquid, and the liquid supplement tank body 800 and the gas mixing tank body 900 both adopt the detachable installation structure, so that the interior can be conveniently maintained and cleaned.

[0066] The preferred embodiments of the application are specifically described above, but the application is not limited to the above-described embodiments, and those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the application, and these equivalent modifications or replacements are all included in the scope defined by the claims of the present application.

Claims

1. A top-up liquid filled foam generating device characterised in that: It comprises: a liquid storage cavity (100); a liquid supplement cavity (200) provided with an air outlet (210) for vacuumizing the liquid supplement cavity (200) at the top, the liquid supplement cavity (200) being communicated with the liquid storage cavity (100) through a liquid supplement channel; a gas mixing cavity (300) provided with a foam generating nozzle (310) at the top and a gas inlet (320) for supplying gas to the gas mixing cavity (300) to pressurize the gas mixing cavity (300), the gas mixing cavity (300) being communicated with the liquid supplement cavity (200) through a one-way liquid supplement valve (330) at the bottom, the foam generating nozzle (310) being provided with a liquid outlet channel (311) extending downward to the bottom of the gas mixing cavity (300), a gas outlet channel (312) communicated with a gas cavity above the liquid surface in the gas mixing cavity (300), and a mixing channel (313) communicated with the liquid outlet channel (311) and the gas outlet channel (312); a gas pressure balancing mechanism for balancing the pressure between the liquid supplement cavity (200) and the gas mixing cavity (300); and further comprising a pump body module provided with an air inlet end connected with the air outlet (210) and an air outlet end connected with the gas inlet (320), the pump body module being an electric air pump (400), which realizes vacuumizing the liquid supplement cavity (200) and pressurizing the gas mixing cavity (300) at the same time when the pump body module is in operation, and realizes liquid supplement and foam generation at the same time; the gas pressure balancing mechanism comprises a first gas pressure balancing assembly (220) arranged at the top of the liquid supplement cavity (200) and a second gas pressure balancing assembly (340) arranged at the top of the gas mixing cavity (300), the first gas pressure balancing assembly (220) being used for balancing the pressure between the liquid supplement cavity (200) and the outside, and the second gas pressure balancing assembly (340) being used for balancing the pressure between the gas mixing cavity (300) and the outside; the liquid supplement channel has a liquid supplement outlet end (230) arranged in the liquid supplement cavity (200) and a liquid supplement inlet end (240) arranged in the liquid storage cavity (100), and the one-way liquid supplement valve (330) is lower than the liquid supplement outlet end (230).

2. The foam generating device with liquid supplement on top according to claim 1, characterized in that: the foam generating nozzle (310) comprises a sleeve groove (314) arranged in the top of the gas mixing cavity (300) and a hollow sleeve member (315) sleeved in the sleeve groove (314), the mixing channel (313) is arranged at the top of the sleeve groove (314) and communicated with the sleeve groove (314), the gas outlet channel (312) is formed between the sleeve member (315) and the sleeve groove (314), and the sleeve member (315) is provided with a liquid outlet pipe (316) extending downward to the bottom of the gas mixing cavity (300), and the liquid outlet channel (311) is formed in the liquid outlet pipe (316).

3. The foam generating device with liquid supplement on top according to claim 1, characterized in that: it further comprises a foam refining unit (600) connected with the outlet of the mixing channel (313) through a pipeline.

4. The over-supplement liquid type foam generating device according to claim 1, characterized in that: The one-way supplement liquid valve (330) comprises an umbrella-shaped valve core (331), a supplement liquid through hole (332) and a guide hole (333) arranged at the bottom of the gas mixing groove cavity (300), the umbrella-shaped valve core (331) comprises a valve cap (334) and a valve rod (335), the valve rod (335) is in sliding fit with the guide hole (333) up and down, the supplement liquid through hole (332) is arranged below the valve cap (334), the supplement liquid through hole (332) is in communication with the supplement liquid groove cavity (200), the number of the supplement liquid through holes (332) is multiple, and the multiple supplement liquid through holes (332) are arranged in a ring shape and are spaced apart with the axis of the valve rod (335) as the center.

5. The over-supplement liquid type foam generating device according to claim 1, characterized in that: It further comprises a liquid storage bottle (700) with a bottle opening arranged at the top, a supplement liquid groove body (800) and a gas mixing groove body (900), the liquid storage groove cavity (100) is located in the liquid storage bottle (700), the supplement liquid groove body (800) can be detachably installed at the bottle opening of the liquid storage bottle (700), the gas mixing groove body (900) can be detachably sleeved in the supplement liquid groove body (800), and the supplement liquid channel comprises a supplement liquid pipe (250) arranged at the bottom of the supplement liquid groove body (800) and a liquid suction pipe (260) connected with the lower end of the supplement liquid pipe (250), the upper end of the supplement liquid pipe (250) extends upwards to the upper portion of the supplement liquid groove cavity (200).

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