A liquid make-up foam generator

Abstract

The application discloses a liquid supplementing type foam generating device, which comprises a liquid storage cavity, a liquid supplementing cavity, a gas mixing cavity and a gas pressure balancing mechanism. The liquid supplementing cavity is provided with an elastic element, which divides the liquid supplementing cavity into a liquid supplementing transfer chamber and an elastic chamber, so that the volumes of the liquid supplementing transfer chamber and the elastic chamber are complementarily changed. The elastic chamber is provided with a gas suction port, and the liquid supplementing transfer chamber is connected with the liquid storage cavity through a first one-way valve. The gas mixing cavity is provided with a foam generating nozzle, a gas supply port for supplying gas to the gas mixing cavity to pressurize the gas mixing cavity, and the gas mixing cavity is connected with the liquid supplementing transfer chamber through a second one-way valve. The foam generating nozzle is provided with a liquid outlet channel, a gas outlet channel and a mixing channel. The gas pressure balancing mechanism is used for balancing the pressure between the liquid supplementing transfer chamber and the gas mixing cavity. The liquid supplementing flow channel in the device is separated from the outside through the elastic element, and the phenomenon of liquid leakage to the outside does not occur, and the placement posture of the device does not need to be limited.

Description

Technical Field

[0001] This invention relates to the field of bathroom products, and in particular to a liquid-replenishing foam generator. Background Technology

[0002] Currently, foam dispensers are commonly used to spray shower gel, shampoo, or hand soap. However, existing foam dispensers typically use a mechanically operated manual or electric foam pump to generate foam and dispense the liquid. The liquid usually passes through the pump body, which is prone to clogging and corrosion from the foamy soap over time. Furthermore, to ensure the pump can quickly dispense soap as foam, a small reservoir is generally used, requiring frequent replenishment. Some dispensers on the market use two pumps to dispense the soap separately. The current method of spraying and replenishing soap solution is complex and costly. Some methods achieve replenishment through air pressure and liquid level balance, such as the top-mounted replenishment foam generator disclosed in patent number CN117098482A. However, this solution directly evacuates the replenishment tank through the air extraction port, and the replenishment tank is directly connected to the storage tank, making the internal replenishment channel connected to the outside, which easily leads to leakage. The electric foam pump is easily corroded and damaged by the soap solution, and replenishment through liquid level balance is slow and requires specific placement of the device. Summary of the Invention

[0003] The purpose of this invention is to provide a replenishment-type foam generator to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.

[0004] The technical solution adopted to solve the above-mentioned technical problems is as follows:

[0005] This invention provides a replenishment-type foam generator, comprising:

[0006] Liquid storage tank cavity;

[0007] The replenishment tank cavity is equipped with an elastic element with a contraction and rebound function. The elastic element divides the replenishment tank cavity into a replenishment transfer chamber and an elastic chamber, so that the volumes of the replenishment transfer chamber and the elastic chamber can change complementaryly. The elastic chamber is equipped with an air extraction port for evacuating the elastic chamber. The replenishment transfer chamber and the liquid storage tank cavity are connected by a first one-way valve.

[0008] The mixing chamber is equipped with a foam generating nozzle and an air supply port for supplying and pressurizing the mixing chamber. The mixing chamber is connected to the liquid replenishment transfer chamber through a second one-way valve. The foam generating nozzle is equipped with a liquid outlet channel extending downward to the bottom of the mixing chamber, an air outlet channel communicating with the air chamber above the liquid surface inside the mixing chamber, and a mixing channel communicating with the outlets of the liquid outlet channel and the air outlet channel.

[0009] A pressure balancing mechanism is used to balance the pressure between the liquid replenishment transfer chamber and the gas mixing tank.

[0010] The beneficial effects of the replenishment-type foam generator of the present invention are:

[0011] In use, soap solution is stored in the storage tank. A vacuum is created inside the elastic chamber through the air extraction port, forming a negative pressure. The elastic chamber contracts, reducing its volume, while the volume of the replenishment transfer chamber increases. The soap solution in the storage tank is then drawn into the replenishment transfer chamber, achieving liquid absorption. Once the negative pressure in the elastic chamber is released, and the pressure between the replenishment transfer chamber and the mixing tank is balanced by the air pressure balancing mechanism, the elastic element contracts and rebounds, causing the elastic chamber to return to its original position, increasing its volume, while the volume of the replenishment transfer chamber decreases. This forces the soap solution in the replenishment transfer chamber into the mixing tank, achieving liquid replenishment. The elastic element isolates the internal replenishment channel from the outside, preventing leakage. Furthermore, the contraction and rebound characteristics of the elastic element facilitate the replenishment of soap solution into the replenishment tank, increasing the replenishment speed. No restrictions are placed on the placement of the device.

[0012] When foam needs to be sprayed, air is supplied and pressurized into the mixing chamber through the air supply port to create a high pressure in the mixing chamber. Under the pressure, the soap solution in the mixing chamber enters the mixing channel from the liquid outlet channel. At the same time, the gas in the mixing chamber also enters the mixing channel from the gas outlet channel under the pressure. The gas and soap solution mix in the mixing channel to form foam, and then spray out from the mixing channel together to achieve foam spraying.

[0013] As a further improvement to the above technical solution, a pump body module is also included, wherein the pump body module is provided with an air inlet end connected to the air extraction port and an air outlet end connected to the air supply port.

[0014] As a further improvement to the above technical solution, the elastic chamber is provided with an air intake structure, which is configured to allow outside air to enter the elastic chamber when the volume of the elastic chamber shrinks to a limit value or when the volume of the elastic chamber increases due to the elastic force of the elastic member.

[0015] As a further improvement to the above technical solution, the air intake structure is a first micro throttling orifice that connects the elastic chamber to the outside.

[0016] As a further improvement to the above technical solution, the pressure balancing mechanism includes an overflow balancing channel connected between the gas mixing chamber and the liquid storage chamber. The overflow balancing channel is configured such that when the liquid replenishment transfer chamber is squeezed into the mixing chamber for replenishment due to the elastic rebound of the elastic element, the pressure of the gas mixing chamber is balanced between the liquid storage chamber and the liquid replenishment transfer chamber.

[0017] As a further improvement to the above technical solution, the overflow balance channel is provided with a second micro throttling orifice.

[0018] As a further improvement to the above technical solution, the inlet of the overflow balance channel is located above the horizontal plane where the inlet of the liquid outlet channel is located.

[0019] As a further improvement to the above technical solution, the elastic element is an elastic barrel-shaped structure, the elastic element is sleeved in the replenishment tank cavity, the elastic element has a barrel opening that is sealed and sleeved with the inner wall of the replenishment tank cavity, the replenishment transfer chamber is formed on the outer peripheral wall of the elastic element and the inner wall of the replenishment tank cavity, and the elastic chamber is formed on the inner peripheral wall of the elastic element and the inner wall of the replenishment tank cavity.

[0020] As a further improvement to the above technical solution, it also includes a body, the top of which is provided with a top cover, the gas mixing chamber and the liquid replenishment chamber are formed between the body and the top cover, the air extraction port, the air supply port and the foam generating nozzle are provided on the top cover, and the edge of the barrel opening is provided with an outwardly extending sealing edge, which is clamped between the top cover and the body.

[0021] As a further improvement to the above technical solution, the outer edge of the sealing edge is provided with a downwardly extending sealing edge, and the body is provided with an annular groove that engages with the sealing edge.

[0022] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0024] Figure 1 This is a schematic diagram of an embodiment of the liquid replenishment foam generator provided by the present invention.

[0025] Figure 2 yes Figure 1A magnified view of part A in the middle;

[0026] Figure 3 This is a flow diagram of an embodiment of the replenishing foam generator provided by the present invention during replenishment.

[0027] Figure 4 This is a flow diagram of the pump module in operation of an embodiment of the replenishing foam generator provided by the present invention.

[0028] Icon labels:

[0029] Liquid storage tank cavity 100;

[0030] Liquid replenishment tank 200; elastic element 210; barrel opening 211; sealing edge 212; sealing retainer 213; liquid replenishment transfer chamber 220; first one-way valve 221; elastic chamber 230; air extraction port 231; first micro throttling orifice 232;

[0031] Mixing chamber 300; foam generating nozzle 310; liquid outlet channel 311; gas outlet channel 312; mixing channel 313; air supply port 320; second one-way valve 330; overflow balance channel 340; second micro throttling orifice 341;

[0032] Storage bottle 400; bottle cap 410; suction tube 411; dispensing nozzle 412; first reflux nozzle 413;

[0033] Pump body module 500;

[0034] Foam refinement unit 600;

[0035] Body 700; Top cover 710; Liquid replenishment nozzle 720; Second reflux nozzle 730; Annular groove 740. Detailed Implementation

[0036] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0037] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0038] In the description of this invention, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features or their sequential relationship.

[0039] In the description of this invention, unless otherwise explicitly defined, terms such as "setting," "installing," and "connecting" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0040] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are some embodiments of the present invention, not all embodiments.

[0041] Reference Figures 1-4 The replenishment-type foam generator of the present invention is provided in the following embodiments:

[0042] like Figure 1 As shown, the liquid replenishment foam generator of the present invention includes a liquid storage tank 100, a liquid replenishment tank 200, a gas mixing tank 300, and a gas pressure balancing mechanism.

[0043] The liquid storage tank 100 is used to store soap solution. In this embodiment, a liquid storage bottle 400 is provided, and the liquid storage tank 100 is located inside the liquid storage bottle 400.

[0044] like Figure 2 As shown, an elastic element 210 is provided in the replenishment tank cavity 200. In this embodiment, the elastic element 210 is made of elastic rubber material and has a contraction and rebound function. The elastic element 210 divides the interior of the replenishment tank cavity 200 into a replenishment transfer chamber 220 and an elastic chamber 230. The contraction and rebound of the elastic element 210 causes the volumes of the replenishment transfer chamber 220 and the elastic chamber 230 to change complementaryly. It can be understood that when the volume of the elastic chamber 230 contracts and decreases, the volume of the replenishment transfer chamber 220 increases; and when the volume of the elastic chamber 230 increases, the volume of the replenishment transfer chamber 220 contracts and decreases.

[0045] In this embodiment, the elastic chamber 230 is provided with an air extraction port 231. The elastic chamber 230 can be evacuated through the air extraction port 231 to form a negative pressure in the elastic chamber 230, thereby reducing the volume of the elastic chamber 230 and increasing the volume of the liquid replenishment transfer chamber 220. At this time, a negative pressure is formed inside the liquid replenishment transfer chamber 220.

[0046] In this embodiment, the replenishment transfer chamber 220 and the storage tank 100 are connected by a first one-way valve 221. The conduction direction of the first one-way valve 221 is from the storage tank 100 to the replenishment transfer chamber 220. The first one-way valve 221 prevents the fluid in the replenishment transfer chamber 220 from flowing into the storage tank 100.

[0047] like Figure 2 As shown, the mixing chamber 300 in this embodiment is provided with a foam generating nozzle 310 and an air supply port 320. The mixing chamber 300 can be pressurized by supplying air through the air supply port 320 to form a high pressure in the mixing chamber 300. The mixing chamber 300 is connected to the liquid replenishment transfer chamber 220 through a second one-way valve 330. The conduction direction of the second one-way valve 330 is from the liquid replenishment transfer chamber 220 to the mixing chamber 300. It can be understood that under the action of the first one-way valve 221 and the second one-way valve 330, the soap solution can only flow sequentially along the liquid storage chamber 100, the liquid replenishment transfer chamber 220 and the mixing chamber 300, and cannot flow in the opposite direction.

[0048] Among them, such as Figure 2 As shown, the foam generating nozzle 310 is provided with a liquid outlet channel 311, an air outlet channel 312, and a mixing channel 313. The inlet of the liquid outlet channel 311 extends downward to the bottom of the mixing chamber 300. The inlet of the air outlet channel 312 is connected to the air cavity above the liquid surface inside the mixing chamber 300. The mixing channel 313 is connected to the outlets of both the liquid outlet channel 311 and the air outlet channel 312. It can be understood that in this embodiment, the inlet of the liquid outlet channel 311 is located below the liquid surface inside the mixing chamber 300, while the inlet of the air outlet channel 312 is located above the liquid surface inside the mixing chamber 300.

[0049] The pressure balancing mechanism in this embodiment is used to balance the pressure between the liquid replenishment transfer chamber 220 and the gas mixing chamber 300. The pressure balancing mechanism is used to balance the pressure difference between the liquid replenishment transfer chamber 220 and the gas mixing chamber 300, so that the soap solution in the liquid replenishment transfer chamber 220 can flow into the gas mixing chamber 300.

[0050] When using, store the soap solution in the liquid storage tank 100, such as... Figure 3 As shown, a vacuum is created inside the elastic chamber 230 through the air extraction port 231, forming a negative pressure inside the elastic chamber 230. The elastic chamber 230 contracts, its volume decreases, while the volume of the liquid replenishment transfer chamber 220 increases, creating a negative pressure inside the liquid replenishment transfer chamber 220. The soap solution in the liquid storage tank 100 is then drawn into the liquid replenishment transfer chamber 220, thus achieving liquid absorption. Figure 4As shown, when the negative pressure in the elastic chamber 230 is released, and the pressure between the liquid transfer chamber 220 and the mixing tank 300 is balanced by the air pressure balancing mechanism, the elastic element 210 contracts and rebounds, causing the elastic chamber 230 to rebound and reset, increasing its volume, while the volume of the liquid transfer chamber 220 decreases, causing the soap solution in the liquid transfer chamber 220 to be squeezed into the mixing tank 300 to achieve liquid replenishment. The elastic element 210 can separate the liquid replenishment channel inside the device from the outside, preventing leakage. Furthermore, the contraction and rebound characteristics of the elastic element 210 enable the soap solution to be replenished into the liquid replenishment tank 200, increasing the replenishment speed, without limiting the placement posture of the device.

[0051] like Figure 4 As shown, when foam needs to be sprayed, air is supplied and pressurized into the mixing chamber 300 through the air supply port 320 to form a high pressure in the mixing chamber 300. Under the action of pressure, the soap solution in the mixing chamber 300 enters the mixing channel 313 from the liquid outlet channel 311. At the same time, the gas in the mixing chamber 300 also enters the mixing channel 313 from the air outlet channel 312 under the action of pressure. The gas and soap solution mix in the mixing channel 313 to form foam, and then spray out together from the mixing channel 313 to achieve foam spraying.

[0052] This foam generating device creates negative pressure by drawing a vacuum, causing the elastic element 210 to contract and changing the volume between the elastic chamber 230 and the liquid replenishment transfer chamber 220. This creates negative pressure in the liquid replenishment transfer chamber 220, allowing the soap solution to be absorbed. Then, through the air pressure balancing mechanism and the rebound of the elastic element 210, liquid replenishment is achieved. High pressure is created by supplying air to generate and spray foam, thus enabling large-capacity use without frequent liquid replenishment. The liquid replenishment channel is isolated from the outside environment.

[0053] In some embodiments, the pressure balancing mechanism can directly connect the mixing chamber 300 to the outside, so that the mixing chamber 300 has the function of venting and depressurizing to balance the pressure between the liquid replenishment transfer chamber 220 and the mixing chamber 300. However, this results in the liquid replenishment channel being connected to the outside.

[0054] like Figure 1 As shown, the air pressure balancing mechanism of this embodiment includes an overflow balancing channel 340 connected between the gas mixing chamber 300 and the liquid storage chamber 100. In this embodiment, the overflow balancing channel 340 connects the gas mixing chamber 300 and the liquid storage chamber 100, so that a loop is formed between the gas mixing chamber 300, the liquid storage chamber 100 and the liquid replenishment transfer chamber 220, so as to achieve air pressure balance.

[0055] The overflow balance channel 340 is configured such that when the liquid in the liquid transfer chamber 220 is squeezed into the mixing tank for replenishment due to the elastic rebound of the elastic element 210, the pressure of the gas mixing tank 300 is balanced with that of the liquid transfer chamber 220 through the liquid storage tank 100. When the mixing tank is pressurized by the air supply port 320, causing a sudden increase in internal air pressure, the overflow balance channel 340 can close the air passage or the overflow amount can be ignored.

[0056] like Figure 2 As shown, the overflow balance channel 340 of this embodiment is provided with a second micro throttling orifice 341. The second micro throttling orifice 341 is used to balance the air pressure. When the elastic chamber 230 rebounds and resets, and the soap solution in the liquid replenishment transfer chamber 220 is squeezed into the mixing chamber 300 for liquid replenishment, the second micro throttling orifice 341 acts as an air pressure balance regulator. However, when the mixing chamber 300 is pressurized instantaneously by the air supply port 320, the amount of gas overflowing from the second micro throttling orifice 341 is negligible.

[0057] In some embodiments, a series of flow control devices such as solenoid valves and microporous membranes may be installed in the overflow balance channel 340, which will not be described in detail in this invention.

[0058] like Figure 2 As shown, in this embodiment, the second micro throttling orifice 341 is located at the end where the overflow balance channel 340 connects to the mixing chamber 300, which is the inlet end of the overflow balance channel 340. However, during use, the second micro throttling orifice 341 is prone to blockage. In some other embodiments, the second micro throttling orifice 341 is located at the end of the overflow balance channel 340 near the outlet.

[0059] In some other embodiments, the pressure balancing mechanism can release pressure through the exhaust passage 312.

[0060] In some embodiments, such as Figure 2 As shown, in this embodiment, the inlet of the overflow balance channel 340 is located above the horizontal plane where the inlet of the liquid outlet channel 311 is located. When the soap solution in the mixing chamber 300 is consumed until the liquid level drops below the inlet of the overflow balance channel 340, the air pressure in the mixing chamber 300 is released through the overflow balance channel 340 to ensure that the inlet of the liquid outlet channel 311 is below the liquid level. At this time, liquid replenishment is required. During liquid replenishment, the soap solution in the liquid replenishment transfer chamber 220 is squeezed into the mixing chamber 300. At this time, the air pressure in the mixing chamber 300 is also released through the overflow balance channel 340, so that the soap solution in the liquid replenishment transfer chamber 220 can be quickly and smoothly squeezed into the mixing chamber 300 to achieve rapid liquid replenishment.

[0061] Furthermore, such as Figure 1As shown, the present invention also includes a pump module 500. The pump module 500 is provided with an air inlet end connected to the air extraction port 231 and an air outlet end connected to the air supply port 320. In this embodiment, the pump module 500 is set up to simultaneously perform vacuuming and gas pressurization. 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 to say, the pump module 500 has the functions of low-pressure air intake and high-pressure air output. Low-pressure air intake is used for vacuuming, and high-pressure air output is used for pressurizing and supplying gas. In this embodiment, the air inlet end of the pump module 500 is connected to the air extraction port 231, and the air outlet end is connected to the air supply port 320. When the pump module 500 is running, it can simultaneously realize the vacuuming of the elastic chamber 230 and the pressurization of the mixing chamber 300. The pump module 500 adopts an electric air pump.

[0062] like Figure 4 As shown, when the electric air pump is working, a negative pressure is formed inside the elastic chamber 230, and a high pressure is formed in the mixing tank 300. Under the influence of the negative pressure, the elastic chamber 230 contracts and its volume decreases, while the volume of the liquid replenishment transfer chamber 220 increases, and a negative pressure is formed inside the liquid replenishment transfer chamber 220. The soap solution in the liquid storage tank 100 is drawn into the liquid replenishment transfer chamber 220. Under the influence of the high pressure, the liquid and gas in the mixing tank 300 are mixed together and expelled to form foam.

[0063] like Figure 3 As shown, when the electric air pump stops running, the elastic element 210 contracts and rebounds, and under the pressure balance of the air pressure balancing mechanism, the elastic chamber 230 rebounds and resets, increasing its volume, while the volume of the liquid replenishment transfer chamber 220 decreases, causing the soap solution in the liquid replenishment transfer chamber 220 to be squeezed into the air mixing tank 300, so as to achieve liquid replenishment.

[0064] In some other embodiments, the pump module 500 may be a manual air pump, which is generally an airbag pump structure and uses two one-way air valves to control the air inlet and outlet, so that when the air pump is squeezed, the gas inside the air pump can only be discharged from the outlet end; when the air pump is reset, the gas can only be introduced from the inlet end.

[0065] like Figure 1 As shown, this embodiment also includes a foam refining unit 600, which is connected to the outlet of the mixing channel 313 via a pipe. This embodiment is provided with a foam refining unit 600 to refine the foam of the mixture of soap solution and gas.

[0066] The elastic chamber 230 of this embodiment is provided with an air intake structure, which is configured to allow outside air to enter the elastic chamber 230 when the volume of the elastic chamber 230 shrinks to its limit value or when the volume of the elastic chamber 230 increases due to the elastic force of the elastic member 210.

[0067] Specifically, such as Figure 2 As shown, the air intake structure is a first micro throttling orifice 232 that connects the elastic chamber 230 to the outside. When the elastic chamber 230 contracts to its limit, the first micro throttling orifice 232 can provide the air volume required by the air pump and the air volume required for the elastic chamber 230 to rebound.

[0068] In other embodiments, the air intake structure may be configured as a series of flow control devices such as solenoid valves and microporous membranes, which will not be described in detail in this invention.

[0069] like Figure 2 As shown, the elastic element 210 in this embodiment is an elastic barrel-shaped structure. The elastic element 210 is sleeved inside the liquid replenishment tank cavity 200. The elastic element 210 is provided with a barrel opening 211 that is sealed and sleeved with the inner wall of the liquid replenishment tank cavity 200. The barrel opening 211 is connected to the first micro throttling orifice 232 and the air extraction port 231 respectively. The liquid replenishment transfer chamber 220 is formed on the outer peripheral wall of the elastic element 210 and the inner wall of the liquid replenishment tank cavity 200. The elastic chamber 230 is formed on the inner peripheral wall of the elastic element 210 and the inner wall of the liquid replenishment tank cavity 200.

[0070] Furthermore, such as Figure 1 and Figure 2 As shown, this embodiment also includes a body 700, with a top cover 710 detachably provided on the top of the body 700. The gas mixing chamber 300 and the liquid replenishment chamber 200 are formed between the body 700 and the top cover 710, so that the interior of the gas mixing chamber 300 and the liquid replenishment chamber 200 can be cleaned and maintained. The first micro throttling orifice 232, the air extraction port 231, the air supply port 320, and the foam generating nozzle 310 are provided on the top cover 710.

[0071] In this embodiment, the edge of the barrel opening 211 is provided with an outwardly extending sealing edge 212. The sealing edge 212 is clamped between the top cover 710 and the body 700 to achieve the sealed installation of the elastic element 210.

[0072] To further improve the sealing performance of the elastic element 210, the outer edge of the sealing edge 212 is provided with a downwardly extending sealing edge 213, and the body 700 is provided with an annular groove 740 that engages with the sealing edge 213.

[0073] like Figure 1As shown, in this embodiment, the main body 700 and the liquid storage bottle 400 are set separately. The liquid storage bottle 400 is provided with a bottle cap 410. The bottom of the bottle cap 410 is provided with a suction tube 411 that extends into the liquid storage tank cavity 100. The top of the bottle cap 410 is provided with a liquid outlet 412 and a first return nozzle 413. The liquid outlet 412 is connected to the suction tube 411. The main body 700 is provided with a replenishing nozzle 720 and a second return nozzle 730. A second micro throttling orifice 341 is also provided in the main body 700. The replenishing nozzle 720 is connected to the replenishing transfer chamber 220. The second return nozzle 730 is connected to the second micro throttling orifice 341. The replenishing nozzle 720 is connected to the liquid outlet 412 through a pipe. The first return nozzle 413 is connected to the second return nozzle 730 through a pipe to form an overflow balance channel 340.

[0074] In some other embodiments, the second micro throttling orifice 341 is disposed in the second return nozzle 730 to facilitate cleaning and maintenance of the second micro throttling orifice 341. Alternatively, the second micro throttling orifice 341 and the second return nozzle 730 are separate structures, with the second micro throttling orifice 341 formed in a sleeve, which is detachably fitted into the second return nozzle 730.

[0075] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0076] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A replenishment-type foam generator, characterized in that, include: Liquid storage tank (100); A replenishment tank (200) is provided with an elastic element (210) having a shrinkage and rebound function. The elastic element (210) divides the replenishment tank (200) into a replenishment transfer chamber (220) and an elastic chamber (230) so that the volumes of the replenishment transfer chamber (220) and the elastic chamber (230) can change complementaryly. The elastic chamber (230) is provided with an air extraction port (231) for evacuating the elastic chamber (230). The replenishment transfer chamber (220) is connected to the liquid storage tank (100) through a first one-way valve (221). The mixing chamber (300) is provided with a foam generating nozzle (310) and an air supply port (320) for supplying and pressurizing the mixing chamber (300). The mixing chamber (300) is connected to the liquid replenishment transfer chamber (220) through a second one-way valve (330). The foam generating nozzle (310) is provided with a liquid outlet channel (311) extending downward to the bottom of the mixing chamber (300), an air outlet channel (312) communicating with the air chamber above the liquid surface inside the mixing chamber (300), and a mixing channel (313) communicating with the outlets of the liquid outlet channel (311) and the air outlet channel (312). A pressure balancing mechanism is used to balance the pressure between the liquid replenishment transfer chamber (220) and the gas mixing chamber (300); The elastic element (210) is an elastic barrel-shaped structure. The elastic element (210) is sleeved inside the replenishment tank cavity (200). The elastic element (210) has a barrel opening (211) that is sealed and sleeved with the inner wall of the replenishment tank cavity (200). The replenishment transfer chamber (220) is formed on the outer peripheral wall of the elastic element (210) and the inner wall of the replenishment tank cavity (200). The elastic chamber (230) is formed on the inner peripheral wall of the elastic element (210) and the inner wall of the replenishment tank cavity (200).

2. The replenishment-type foam generator according to claim 1, characterized in that: It also includes a pump body module (500), which has an air inlet connected to the air extraction port (231) and an air outlet connected to the air supply port (320).

3. The replenishment-type foam generator according to claim 2, characterized in that: The elastic chamber (230) is provided with an air intake structure, which is configured to allow outside air to enter the elastic chamber (230) when the volume of the elastic chamber (230) shrinks to a limit value or when the volume of the elastic chamber (230) increases due to the elastic force of the elastic member (210).

4. The replenishment-type foam generator according to claim 3, characterized in that: The air intake structure is a first micro throttling orifice (232) that connects the elastic chamber (230) to the outside.

5. The replenishment-type foam generator according to claim 1, characterized in that: The pressure balancing mechanism includes an overflow balancing channel (340) connected between the gas mixing chamber (300) and the liquid storage chamber (100). The overflow balancing channel (340) is configured such that when the liquid in the liquid replenishment transfer chamber (220) is squeezed into the mixing chamber for replenishment by the elastic force of the elastic member (210), the pressure of the gas mixing chamber (300) is balanced with that of the liquid storage chamber (100) and the liquid replenishment transfer chamber (220).

6. The replenishment-type foam generator according to claim 5, characterized in that: The overflow balance channel (340) is provided with a second micro throttling orifice (341).

7. The replenishment-type foam generator according to claim 6, characterized in that: The inlet of the overflow balance channel (340) is located above the horizontal plane where the inlet of the liquid outlet channel (311) is located.

8. The replenishment-type foam generator according to claim 1, characterized in that: It also includes a body (700), the top of which is provided with a top cover (710), the gas mixing chamber (300) and the liquid replenishment chamber (200) are formed between the body (700) and the top cover (710), the air extraction port (231), the air supply port (320) and the foam generating nozzle (310) are provided on the top cover (710), and the edge of the barrel opening (211) is provided with an outwardly extending sealing edge (212), which is clamped between the top cover (710) and the body (700).

9. The replenishment-type foam generator according to claim 8, characterized in that: The outer edge of the sealing edge (212) is provided with a downwardly extending sealing edge (213), and the body (700) is provided with an annular groove (740) that engages with the sealing edge (213).

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