Inverted fillable foam generating device

Abstract

The inverted fillable foam generating device comprises a liquid supplementing mechanism and a foam generating mechanism, the liquid supplementing mechanism comprises a liquid soap cavity used for storing liquid soap, and a liquid supplementing opening is formed in the bottom of the liquid soap cavity; the foam generating mechanism comprises a mixing cavity, a pressurizing air inlet assembly and an air-liquid mixing assembly, the air pressure balancing structure comprises an air pressure balancing channel communicated between the soap liquid cavity and the mixing cavity, and the air pressure balancing channel is provided with a balancing air inlet end and a balancing air outlet end. The air pressure balance channel balances the air pressure between the mixing cavity and the liquid soap cavity, and liquid soap in the liquid soap cavity enters the mixing cavity through the liquid supplementing one-way valve until the liquid level of the mixing cavity is consistent with the horizontal height of the balance air inlet end, so that automatic liquid supplementing is achieved. And when the liquid soap is supplemented, the liquid soap cavity only needs to be filled with the liquid soap from top to bottom, so that the function that the liquid soap can be filled after being inverted is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of bathroom products, in particular to an inverted fillable foam generating device. BACKGROUND

[0002] At present, foam generators are generally used to realize the spraying of shower gel, shampoo or hand sanitizer. In order to quickly spray soap liquid in the form of foam, a small liquid storage cavity is generally used to store the soap liquid, so that the liquid needs to be frequently supplemented during use. Although patent No. CN114727726A discloses a large-capacity single-gas-pump foam generating device with a lower structure, the technical solution is complex, and an additional liquid supplementing valve structure and liquid supplementing top driving structure are required. The complex structure and many parts result in the expansion of the device size and the increase of manufacturing cost. SUMMARY The present application aims to provide an inverted fillable foam generating device to solve one or more technical problems in the prior art and at least provide a beneficial choice or create conditions.

[0003] The technical scheme adopted to solve the above technical problems is as follows: The present application provides an inverted fillable foam generating device, comprising: A liquid supplementing mechanism, comprising a soap liquid cavity for storing soap liquid, the bottom of the soap liquid cavity being provided with a liquid supplementing port; A foam generating mechanism, comprising a mixing cavity, a pressurized air inlet assembly, an air-liquid mixing assembly and an air pressure balancing structure, the upper part of the mixing cavity being in communication with the liquid supplementing port, the pressurized air inlet assembly comprising a pressurized air supply unit and an air inlet channel, the air inlet channel comprising a pressurized air inlet end and a pressurized air outlet end, the pressurized air inlet end being connected with the pressurized air supply unit, the pressurized air outlet end being in communication with the mixing cavity, the air-liquid mixing assembly comprising a liquid outlet channel, an air outlet channel and a mixing channel, the inlet ends of the liquid outlet channel and the air outlet channel both being in communication with the mixing cavity, the air pressure balancing structure comprising an air pressure balancing channel communicated between the soap liquid cavity and the mixing cavity, the air pressure balancing channel being provided with a balancing air inlet end and a balancing air outlet end, the balancing air inlet end being communicated with the mixing cavity, the balancing air outlet end being communicated above the liquid surface of the soap liquid cavity, the horizontal height of the balancing air inlet end being lower than the inlet end of the air outlet channel, the horizontal height of the balancing air inlet end being higher than the inlet end of the liquid outlet channel, the outlet end of the liquid outlet channel and the outlet end of the air outlet channel being respectively in communication with the inlet of the mixing channel; The liquid supplementing port is provided with a liquid supplementing one-way valve, a direction of conduction of the liquid supplementing one-way valve is from the soap liquid cavity to the mixing cavity, and the liquid supplementing one-way valve is used for allowing the soap liquid in the soap liquid cavity to enter the mixing cavity through the liquid supplementing one-way valve when a liquid level of the mixing cavity is lower than the balance air inlet end, until the liquid level of the mixing cavity is consistent with a horizontal height where the balance air inlet end is located.

[0004] The inverted foam generating device has the following advantages: When the soap is needed, the pressurized air supply unit supplies air to the liquid level above the mixing cavity through the air inlet channel, the soap liquid in the mixing cavity enters the mixing channel from the liquid outlet channel under the action of the pressure, and the gas in the mixing cavity also enters the mixing channel from the gas outlet channel under the action of the pressure, the gas and the soap liquid are mixed in the mixing channel to form foam, and then the foam is sprayed from the mixing channel, the air pressure balance channel balances the air pressure between the mixing cavity and the soap liquid cavity after the pressurized air supply unit stops supplying air, the soap liquid in the soap liquid cavity enters the mixing cavity through the liquid supplementing one-way valve, until the liquid level of the mixing cavity is consistent with the horizontal height where the balance air inlet end is located, so that the liquid is automatically supplemented, and the liquid supplementing and foam generating can be realized through the simple structure, so that the large capacity use is realized, and the soap liquid needs not to be frequently supplemented, and when the soap liquid is supplemented, the soap liquid cavity is only needed to be filled with the soap liquid from top to bottom, so that the inverted soap liquid filling function is realized.

[0005] As a further improvement of the above technical solution, the air pressure balance channel is provided with a one-way air passage structure, and a direction of gas conduction of the one-way air passage structure is from the balance air inlet end to the balance air outlet end.

[0006] As a further improvement of the above technical solution, the horizontal height where the balance air inlet end is located is lower than the pressurized air outlet end.

[0007] As a further improvement of the above technical solution, the air inlet channel is provided with an air inlet one-way valve, a direction of conduction of the air inlet one-way valve is from the pressurized air inlet end to the pressurized air outlet end, the mixing channel is provided with a foam outlet control valve, and the foam outlet control valve is configured to open the mixing channel when the pressure of the mixing cavity reaches a preset threshold value or an external foam outlet signal is received.

[0008] As a further improvement of the above technical solution, the upper portion of the soap liquid cavity is provided with a liquid adding port, and the liquid adding port is provided with a cover.

[0009] As a further improvement of the above technical solution, the top of the soap liquid cavity is provided with a pressure relief hole in communication with the outside.

[0010] As a further improvement of the above technical solution, the liquid supplementing mechanism further comprises a soap container, the soap cavity is formed in the soap container, a bottle mouth is arranged at the bottom of the soap container, a combined cover structure is sleeved on the bottle mouth, the combined cover structure comprises an inner sleeve cover and an outer sleeve cover, the inner sleeve cover is a barrel-shaped structure with an opening facing downward, the inner sleeve cover is sleeved on the inner side of the bottle mouth, the outer sleeve cover is a barrel-shaped structure with an opening facing upward, the liquid supplementing port and the air pressure balancing structure are arranged on the inner sleeve cover, the outer sleeve cover is sleeved on the outer side of the bottle mouth, and the mixing cavity is formed between the inner sleeve cover and the outer sleeve cover, the air inlet channel and the gas-liquid mixing assembly are arranged on the outer sleeve cover.

[0011] As a further improvement of the above technical solution, the lower end of the outer peripheral wall of the inner sleeve cover is provided with an annular step extending to the periphery, the upper end surface of the annular step is in abutment with the end surface of the bottle mouth, and the lower end surface of the annular step is in abutment with the inner end surface of the outer sleeve cover facing the bottle mouth.

[0012] As a further improvement of the above technical solution, the first sealing ring is arranged between the annular step and the end surface of the bottle mouth, and the second sealing ring is arranged between the lower end of the inner sleeve cover and the inner end surface of the outer sleeve cover facing the bottle mouth.

[0013] As a further improvement of the above technical solution, the inner peripheral wall of the outer sleeve cover is threadedly connected with the outer peripheral wall of the bottle mouth.

[0014] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent from the description, or can be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0015] The present application will be further described below in conjunction with the drawings and embodiments, wherein: The present application will be further described below in conjunction with the drawings and embodiments; Figure 1 is Figure 4 is a sectional view of the B-B section in FIG. 1; Figure 2 is Figure 1 is a partial enlarged view of the C part in FIG. 1; Figure 3 is Figure 4 is a sectional view of the A-A section in FIG. 1; Figure 4 is a top view of an embodiment of the inverted foam generating device provided by the present application; Figure 5 is an exploded view of an embodiment of the inverted foam generating device provided by the present application; Figure 6is a structure schematic view of an embodiment of the inverted fillable foam generating device provided by the present application; Reference signs: Liquid supplement mechanism 100; soap solution cavity 110; liquid supplement port 111; liquid supplement port 112; cover 113; pressure relief hole 114; soap solution container 120; bottle mouth 121; Foam generating mechanism 200; mixing cavity 210; pressurized air inlet assembly 220; air inlet channel 221; pressurized air inlet end 2211; pressurized air outlet end 2212; air inlet one-way valve 2213; gas-liquid mixing assembly 230; liquid outlet channel 231; gas channel 232; mixing channel 233; foam outlet control valve 2331; Liquid supplement one-way valve 300; Air pressure balance channel 400; balance air inlet end 410; balance air outlet end 420; one-way air passage structure 430; Inner sleeve cover 500; annular step 510; sunken platform 520; first connecting nozzle 530; balance pipe 531; Outer sleeve cover 600; limiting groove 610; second connecting nozzle 620; air inlet pipe 621; third connecting nozzle 630; sleeve connecting cylinder 640; air outlet pipe 650; liquid outlet groove 651; First sealing ring 700; Second sealing ring 800. DETAILED DESCRIPTION

[0016] The embodiments of the present application are described in detail below with reference to the accompanying drawings, in which the same or similar elements or elements having the same or similar functions are denoted by the same reference numerals throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and cannot be understood as limiting the present application.

[0017] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, etc. 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 indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0018] In the description of the present application, the plural refers to two or more. If there is a description of first, second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0019] In the description of the present application, the words such as arrangement, installation, connection and the like should be understood in a broad sense unless otherwise explicitly limited, and the skilled in the art can determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0020] The technical solutions of the present application will be described clearly and completely in combination with the accompanying drawings. Obviously, the following described embodiments are part of the embodiments of the present application, not all the embodiments.

[0021] With reference to Figures 1-6 , the inverted fillable foam generating device of the present application is embodied as follows: As Figure 1 shown, the inverted fillable foam generating device of the present application comprises a liquid supplementing mechanism 100 and a foam generating mechanism 200.

[0022] As Figure 1 and Figure 2 shown, the liquid supplementing mechanism 100 comprises a soap liquid cavity 110 for storing soap liquid, the bottom of the soap liquid cavity 110 is provided with a liquid supplementing port 111, and the upper part of the soap liquid cavity 110 is provided with a liquid supplementing port 112, the liquid supplementing port 112 is provided with a cover 113, during use, the cover 113 can be opened, and the soap liquid can be added into the soap liquid cavity 110 through the liquid supplementing port 112.

[0023] As Figure 1 and Figure 2 shown, the foam generating mechanism 200 of the present application comprises a mixing cavity 210, a pressurized air inlet assembly 220 and an air-liquid mixing assembly 230, wherein the upper part of the mixing cavity 210 is in communication with the liquid supplementing port 111, the liquid supplementing port 111 is provided with a liquid supplementing one-way valve 300, and the conduction direction of the liquid supplementing one-way valve 300 is from the soap liquid cavity 110 to the mixing cavity 210.

[0024] As Figure 2 shown, the pressurized air inlet assembly 220 of the present embodiment comprises a pressurized air supply unit (not shown in the figure) and an air inlet channel 221, the air inlet channel 221 comprises a pressurized air inlet end 2211 and a pressurized air outlet end 2212, the pressurized air inlet end 2211 is connected with the pressurized air supply unit, and the pressurized air outlet end 2212 is in communication with the mixing cavity 210, the pressurized air supply unit is used for providing high-pressure gas to the air inlet channel 221 to pressurize the mixing cavity 210.

[0025] As Figure 2 shown, the air-liquid mixing assembly 230 of the present embodiment comprises an outlet liquid channel 231, an outlet gas channel 232 and a mixing channel 233, the inlet ends of the outlet liquid channel 231 and the outlet gas channel 232 are both in communication with the mixing cavity 210, and the outlet end of the outlet liquid channel 231 and the outlet end of the outlet gas channel 232 are respectively in communication with the inlets of the mixing channel 233.

[0026] The air pressure balancing structure is arranged between the mixing cavity 210 and the soap cavity 110, and is used for balancing the air pressure between the mixing cavity 210 and the soap cavity 110. Specifically, the air pressure balancing structure of the embodiment includes an air pressure balancing channel 400 which is communicated between the soap cavity 110 and the mixing cavity 210. The air pressure balancing channel 400 is provided with a balancing air inlet end 410 and a balancing air outlet end 420. The balancing air inlet end 410 is communicated with the mixing cavity 210, and the balancing air outlet end 420 is communicated above the liquid surface of the soap cavity 110. The horizontal height of the balancing air inlet end 410 is lower than the inlet end of the air outlet channel 232, and the horizontal height of the balancing air inlet end 410 is higher than the inlet end of the liquid outlet channel 231.

[0027] The air pressure balancing channel 400 of the embodiment is provided with a one-way air passage structure 430. The gas passage direction of the one-way air passage structure 430 is from the balancing air inlet end 410 to the balancing air outlet end 420. The one-way air passage structure 430 can only allow gas to pass through, and cannot allow liquid to pass through.

[0028] It can be understood that, in a static state, the liquid surface in the mixing cavity 210 is located at the horizontal height of the balancing air inlet end 410. The balancing air inlet end 410 is blocked. At this time, the inlet end of the air outlet channel 232 is located above the liquid surface of the mixing cavity 210, and the inlet end of the air outlet channel 232 is communicated with the air cavity above the liquid surface of the mixing cavity 210. The inlet end of the liquid outlet channel 231 is below the liquid surface in the mixing cavity 210.

[0029] When the soap needs to be discharged, the pressurized air supply unit supplies air to the mixing cavity 210 through the air inlet channel 221. The soap liquid in the mixing cavity 210 is pressed into the mixing channel 233 from the liquid outlet channel 231 under the action of the pressure. At the same time, the gas in the mixing cavity 210 also enters the mixing channel 233 from the air outlet channel 232 under the action of the pressure. The gas and the soap liquid are mixed in the mixing channel 233 to form foam, and then are sprayed from the mixing channel 233 to realize the spraying of the foam. During the spraying of the foam, the liquid surface of the mixing cavity 210 will drop until the liquid surface of the mixing cavity 210 drops to the inlet end of the liquid outlet channel 231, so that the foam cannot be formed.

[0030] When the pressurized gas supply unit stops supplying pressurized gas, the air pressure balancing channel 400 balances the air pressure between the mixing cavity 210 and the soap cavity 110 to depressurize the mixing cavity 210, at this time, the soap in the soap cavity 110 enters the mixing cavity 210 through the liquid supplementing one-way valve 300 until the liquid level in the mixing cavity 210 is consistent with the horizontal height of the air pressure balancing end 410, then the soap in the soap cavity 110 cannot enter the mixing cavity 210 through the liquid supplementing one-way valve 300 to achieve automatic liquid supplementing, the present application can realize liquid supplementing and foam generation through simple structure to realize large capacity use without frequent liquid supplementing, and when supplementing the liquid, the soap cavity 110 can be filled with soap from top to bottom to realize the function of filling the soap cavity 110 in an inverted manner.

[0031] As shown in Figure 2 the liquid supplementing one-way valve 300 of the present embodiment adopts a one-way umbrella valve or duckbill valve structure, when the air pressure balancing channel 400 balances the air pressure between the mixing cavity 210 and the soap cavity 110, the soap in the soap cavity 110 can enter the mixing cavity 210 through the liquid supplementing one-way valve 300 under the action of air pressure, at this time, the gas in the mixing cavity 210 is extruded and discharged to the soap cavity 110 through the air pressure balancing channel 400 to realize equal exchange, when the liquid level in the mixing cavity 210 rises to the horizontal height of the air pressure balancing end 410, the air pressure balancing end 410 is blocked, the gas above the demarcation line of the gas-liquid interface cannot be discharged to form a gas area, at this time, the liquid supplementing is stopped, and at the same time, the liquid supplementing one-way valve 300 is closed to prevent the gas from overflowing from the liquid supplementing port 111 to weaken the air pressure in the mixing cavity 210.

[0032] The one-way air passage structure 430 of the present embodiment is a micro-hole structure for pressure relief function to ensure air pressure balance between the soap cavity 110 and the mixing cavity 210 and prevent liquid flow, in other embodiments, the one-way air passage structure 430 can also be a waterproof air permeable film, a pressure valve or an electromagnetic valve, etc.

[0033] The horizontal height of the air pressure balancing end 410 of the present embodiment is lower than that of the pressurized gas outlet end 2212, in a static state, the liquid level in the mixing cavity 210 is located at the horizontal height of the air pressure balancing end 410, the air pressure balancing end 410 is blocked, at this time, the inlet end of the gas outlet channel 232 and the pressurized gas outlet end 2212 are both located above the liquid level in the mixing cavity 210, the inlet end of the gas outlet channel 232 and the pressurized gas outlet end 2212 are communicated through the gas cavity above the liquid level in the mixing cavity 210, if the horizontal height of the air pressure balancing end 410 is higher than that of the pressurized gas outlet end 2212, it will affect the soap outlet effect and stability, and increase the noise of the machine, because the horizontal height of the air pressure balancing end 410 is lower than that of the pressurized gas outlet end 2212 to blow gas in the soap.

[0034] In some embodiments, the top of the soap tank 110 of the present embodiment is provided with a pressure relief hole 114 in communication with the outside, which functions as a pressure relief hole to ensure that the soap tank 110 is balanced with the outside air pressure.

[0035] In some embodiments, the pressure relief hole 114 can also be replaced by a waterproof air permeable film, a pressure valve, or an electromagnetic valve, etc.

[0036] In other embodiments, when a soft bag disposable non-filling scheme is used, the upper part is not provided with a liquid filling port 112, but only a pressure relief hole in communication with the outside.

[0037] Further, as shown in Figure 2 The air inlet channel 221 of the present embodiment is provided with an air inlet one-way valve 2213, the conduction direction of which is from the pressurized air inlet end 2211 to the pressurized air outlet end 2212, and the air inlet one-way valve 2213 prevents the soap from flowing back to the pressurized air supply unit, which can be an electric pump or a manual pump. The air inlet one-way valve 2213 of the present embodiment is a duckbill valve.

[0038] As shown in Figure 1 and Figure 2 The mixing channel 233 of the present embodiment is provided with a foam control valve 2331 for preventing soap from dripping, which can be a pressure valve or an electromagnetic valve, and the foam control valve 2331 is configured to open the mixing channel 233 when the pressure of the mixing chamber 210 reaches a preset threshold or an external foam signal is received.

[0039] As shown in Figure 1 The liquid supplementing mechanism 100 of the present embodiment further includes a soap container 120. In some embodiments, the soap tank 110 can be an open cavity, and the soap container 120 can be a soft bottle, a hard bottle, or a soft bag, which can be filled with soap.

[0040] As shown in Figure 1 and Figure 2 The soap tank 110 of the present embodiment is formed in the soap container 120, and the bottom of the soap container 120 is provided with a bottle mouth 121, which is fitted with a combined cover structure, as shown in Figure 2 and Figure 5 The combined cover structure includes an inner cover 500 and an outer cover 600. The inner cover 500 is a barrel-shaped structure with an opening facing downward, and is fitted on the inner side of the bottle mouth 121. The liquid supplementing port 111 and the air pressure balancing channel 400 are both provided on the top of the inner cover 500. The outer cover 600 is a barrel-shaped structure with an opening facing upward, and is fitted on the outer side of the bottle mouth 121. The mixing chamber 210 is formed between the inner cover 500 and the outer cover 600, and the air inlet channel 221 and the gas-liquid mixing assembly 230 are both provided on the outer cover 600.

[0041] During assembly, simply place the inner cap 500 inside the bottle mouth 121, and then place the outer cap 600 outside the bottle mouth 121. Assembly is convenient.

[0042] Furthermore, such as Figure 2 As shown, in this embodiment, the lower outer peripheral wall of the inner cover 500 is provided with an annular step 510 extending outwards. A first sealing ring 700 is provided between the annular step 510 and the lower end face of the bottle mouth 121. A second sealing ring 800 is provided between the lower end of the inner cover 500 and the inner end face of the outer cover 600 facing the bottle mouth 121. The inner peripheral wall of the outer cover 600 is threadedly connected to the outer peripheral wall of the bottle mouth 121. The first sealing ring 700 is used to seal between the inner cover 500 and the bottle mouth 121 to prevent the soap liquid in the soap liquid chamber 110 from leaking out from the sealed inner cover 500 and the bottle mouth 121. The second sealing ring 800 is used to seal between the inner cover 500 and the outer cover 600 to prevent the soap liquid in the mixing chamber 210 from leaking out from the inner cover 500 and the outer cover 600.

[0043] like Figure 2 As shown, in this embodiment, the inner end face of the outer cover 600 facing the bottle mouth 121 is provided with an annular limiting groove 610, the lower end of the inner cover 500 fits into the limiting groove 610, and the second sealing ring 800 is provided in the limiting groove 610 to improve the stability of the structure.

[0044] In some other embodiments, the annular step 510 and the lower end face of the bottle mouth 121, and the lower end of the inner cover 500 and the inner end face of the outer cover 600 facing the bottle mouth 121 can be sealed by ultrasonic sealing.

[0045] In some other embodiments, the outer cover 600 and the bottle mouth 121 can be connected together by snap-fit ​​or ultrasonic sealing.

[0046] Furthermore, such as Figure 2 As shown, the top of the inner cover 500 is provided with a downward protruding platform 520, and the liquid replenishment port 111 is provided on the platform 520. In this embodiment, there are multiple liquid replenishment ports 111 to increase the liquid replenishment volume.

[0047] like Figure 2 , Figure 5 and Figure 6 As shown, the specific structure of the pressure balance channel 400 is shown. The top of the inner cover 500 is provided with a first connecting nozzle 530. The first connecting nozzle 530 is connected to a balance tube 531 that extends upward to the liquid surface of the soap liquid chamber 110. The pressure balance channel 400 is formed in the first connecting nozzle 530 and the balance tube 531.

[0048] like Figure 2 , Figure 5 and Figure 6As shown, the bottom surface of the outer cover 600 is connected with a second connecting mouth 620, and the top surface of the outer cover 600 is provided with an air inlet pipe 621 extending above the liquid surface of the mixing cavity 210, and the air inlet pipe 621 is in communication with the second connecting mouth 620 to form the air inlet channel 221.

[0049] As shown in Figure 2 、 Figure 5 and Figure 6 As shown, the bottom surface of the outer cover 600 is connected with a third connecting mouth 630, and the top surface of the outer cover 600 is provided with a sleeve 640, the third connecting mouth 630 is in communication with the sleeve 640, and the sleeve 640 is sleeved with an air outlet pipe 650, the upper end of the air outlet pipe 650 extends above the liquid surface of the mixing cavity 210, and the lower end of the air outlet pipe 650 is sleeved with the sleeve 640, the outer periphery of the lower end of the air outlet pipe 650 is provided with a plurality of liquid outlet grooves 651, the plurality of liquid outlet grooves 651 form a plurality of liquid outlet channels 231 with the inner wall of the sleeve 640, the air outlet channel 232 is formed in the air outlet pipe 650, and the mixing channel 233 is formed in the third connecting mouth 630 and the channel between the third connecting mouth 630 and the sleeve 640.

[0050] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0051] The embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the present application.

Claims

1. An inverted fillable foam generating device, characterized by, The device comprises: a liquid supplementing mechanism (100) comprising a soap solution cavity (110) for storing soap solution, the bottom of the soap solution cavity (110) being provided with a liquid supplementing port (111); a foam generating mechanism (200) comprising a mixing cavity (210), a pressurized air inlet assembly (220), an air-liquid mixing assembly (230), and an air pressure balancing structure, the upper portion of the mixing cavity (210) being in communication with the liquid supplementing port (111), the pressurized air inlet assembly (220) comprising a pressurized air supply unit and an air inlet channel (221), the air inlet channel (221) comprising a pressurized air inlet end (2211) and a pressurized air outlet end (2212), the pressurized air inlet end (2211) being connected to the pressurized air supply unit, the pressurized air outlet end (2212) being in communication with the mixing cavity (210), the air-liquid mixing assembly (230) comprising a liquid outlet channel (231), an air outlet channel (232), and a mixing channel (233), the inlet ends of the liquid outlet channel (231) and the air outlet channel (232) being in communication with the mixing cavity (210), the air pressure balancing structure comprising an air pressure balancing channel (400) in communication between the soap solution cavity (110) and the mixing cavity (210), the air pressure balancing channel (400) being provided with a balancing air inlet end (410) and a balancing air outlet end (420), the balancing air inlet end (410) being in communication with the mixing cavity (210), the balancing air outlet end (420) being in communication above the liquid surface of the soap solution cavity (110), the horizontal height at which the balancing air inlet end (410) is located being lower than the inlet end of the air outlet channel (232), the horizontal height at which the balancing air inlet end (410) is located being higher than the inlet end of the liquid outlet channel (231), the outlet end of the liquid outlet channel (231) and the outlet end of the air outlet channel (232) being in communication with the inlet of the mixing channel (233), respectively. The liquid supplementing port (111) is provided with a liquid supplementing one-way valve (300), the conductive direction of the liquid supplementing one-way valve (300) being from the soap solution cavity (110) to the mixing cavity (210), the liquid supplementing one-way valve (300) being used for allowing the soap solution in the soap solution cavity (110) to enter the mixing cavity (210) through the liquid supplementing one-way valve (300) when the liquid surface of the mixing cavity (210) is lower than the balancing air inlet end (410), until the liquid surface of the mixing cavity (210) is consistent with the horizontal height at which the balancing air inlet end (410) is located.

2. The device according to claim 1, wherein: the air pressure balancing channel (400) is provided with a one-way air passage structure (430), the gas conductive direction of the one-way air passage structure (430) being from the balancing air inlet end (410) to the balancing air outlet end (420).

3. The device according to claim 1, wherein: the horizontal height at which the balancing air inlet end (410) is located is lower than the pressurized air outlet end (2212).

4. The device according to claim 1, wherein: The air inlet channel (221) is provided with an air inlet one-way valve (2213), and a conduction direction of the air inlet one-way valve (2213) is from the pressurized air inlet end (2211) to the pressurized air outlet end (2212); and the mixing channel (233) is provided with a foam outlet control valve (2331), and the foam outlet control valve (2331) is configured to be opened when a pressure of the mixing cavity (210) reaches a preset threshold value or an external foam outlet signal is received. 5.The inverted fillable foam generating device according to claim 1, characterized in that: The upper portion of the soap liquid cavity (110) is provided with a liquid adding port (112), and the liquid adding port (112) is provided with a cover (113). 6.The inverted fillable foam generating device according to claim 1, characterized in that: The top of the soap liquid cavity (110) is provided with a pressure relief hole (114) in communication with the outside. 7.The inverted fillable foam generating device according to claim 1, characterized in that: The liquid supplementing mechanism (100) further comprises a soap liquid container (120), the soap liquid cavity (110) is formed in the soap liquid container (120), the bottom of the soap liquid container (120) is provided with a bottle mouth (121), the bottle mouth (121) is sleeved with a combined cover structure, the combined cover structure comprises an inner sleeve cover (500) and an outer sleeve cover (600), the inner sleeve cover (500) is a barrel-shaped structure with an opening facing downward, the inner sleeve cover (500) is sleeved on the inner side of the bottle mouth (121), the outer sleeve cover (600) is a barrel-shaped structure with an opening facing upward, the liquid supplementing port (111) and the air pressure balancing structure are both arranged on the inner sleeve cover (500), the outer sleeve cover (600) is sleeved on the outer side of the bottle mouth (121), the mixing cavity (210) is formed between the inner sleeve cover (500) and the outer sleeve cover (600), and the air inlet channel (221) and the gas-liquid mixing assembly (230) are both arranged on the outer sleeve cover (600). 8.The inverted fillable foam generating device according to claim 7, characterized in that: The lower end of the outer circumferential wall of the inner sleeve cover (500) is provided with an annular step (510) extending to the periphery, an upper end surface of the annular step (510) abuts against an end surface of the bottle mouth (121), and a lower end surface of the annular step (510) abuts against an inner end surface of the outer sleeve cover (600) facing the bottle mouth (121). 9.The inverted fillable foam generating device according to claim 8, characterized in that: A first sealing ring (700) is arranged between the annular step (510) and the end surface of the bottle mouth (121), and a second sealing ring (800) is arranged between the lower end of the inner sleeve cover (500) and the inner end surface of the outer sleeve cover (600) facing the bottle mouth (121). 10.The inverted fillable foam generating device according to claim 9, characterized in that: The inner circumferential wall of the outer sleeve cover (600) is threadedly connected with the outer circumferential wall of the bottle mouth (121).

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