Downward-installed large-capacity single air pump foam generator

Abstract

The downward-mounted large-capacity single-air pump foam generating device includes a liquid refilling mechanism and a foam generating mechanism. The liquid refilling mechanism includes a liquid refilling tank (100) and a liquid refilling bottle (200). The bottle mouth of the liquid refilling bottle (200) is fitted into the liquid refilling tank (100). The foam generating mechanism includes an air supply pump unit, an air mixing tank chamber (300), an air-liquid mixing structure, an air intake (310) and a ventilation valve structure (320). The lower part of the air mixing tank chamber (300) is connected to the lower part of the liquid refilling tank (100). A liquid refill check valve (400) is provided between the liquid refill bottle (200) and the liquid refill tank (100), and the gas-liquid mixing structure is provided with a drain passage (330), an exhaust passage (340), and a mixing passage (350), the inlet end of the drain passage (330) extends downward into the bottom of the air mixing tank chamber (300), the inlet end of the exhaust passage (340) and the air intake (310) are both connected to the top of the air mixing tank chamber (300), and the outlet end of the drain passage (330) and the outlet end of the exhaust passage (340) are respectively connected to the inlet of the mixing passage (350). The mechanical structure between the liquid refill bottle (200), the liquid refill tank (100), and the air mixing tank chamber (300) of this device allows automatic liquid supply and liquid refilling, realizing large-capacity use and eliminating the need for frequent liquid refilling.

Description

Technical Field

[0001] The present invention relates to the field of sanitary supplies, and particularly to a downward-installed large-capacity single air pump foam generator.

Background Art

[0002] Conventional body soaps, shampoos or hand soaps used in sanitation are packed in packaging bottles or dedicated storage and supply devices and are extruded by manual pressing. All of the extruded body soaps, shampoos or hand soaps are liquids, and they need to be kneaded to form foam, so there are drawbacks that the foaming is uneven and the cleaning effect is insufficient. There are some automatic foam generators realized by foam pumps in the current market, but they have drawbacks such as small capacity, frequent liquid replenishment, and high cost.

Summary of the Invention

Problems to be Solved by the Invention

[0003] An object of the present invention is to provide a downward-installed large-capacity single air pump foam generator that solves one or more technical problems existing in the prior art and provides at least one beneficial option or basis.

Means for Solving the Problems

[0004] The technical solutions for solving the above technical problems are as follows.

[0005] The present invention provides a downward-installed large-capacity single air pump foam generator. The downward-installed large-capacity single air pump foam generator includes a liquid replenishing mechanism and a foam generating mechanism. The liquid replenishing mechanism includes a liquid replenishing tank and a liquid replenishing bottle. The liquid replenishing tank is provided with a fitting opening that opens upward. The lower end of the liquid replenishing bottle is fitted into the liquid replenishing tank from the fitting opening. The liquid replenishing tank communicates with the outside. A bottle mouth is provided at the lower end of the liquid replenishing bottle. The foam generating mechanism includes an air supply pump unit, an air mixing tank chamber, a gas-liquid mixing structure provided above the air mixing tank chamber, an air inlet, and a ventilation valve structure. The lower part of the air mixing tank chamber communicates with the lower part of the liquid replenishing tank. A liquid replenishing check valve is provided between the air mixing tank chamber and the liquid replenishing tank. The communication direction of the liquid replenishing check valve is from the liquid replenishing tank to the air mixing tank chamber. The air supply pump unit is connected to the air inlet. The ventilation valve structure communicates the air mixing tank chamber with the outside. The gas-liquid mixing structure is provided with a liquid discharge passage, an air discharge passage, and a mixing passage. The inlet end of the liquid discharge passage extends downward into the bottom of the air mixing tank chamber. The inlet end of the air discharge passage and the air inlet both communicate with the upper part of the air mixing tank chamber. The outlet end of the liquid discharge passage and the outlet end of the air discharge passage respectively communicate with the inlet of the mixing passage.

[0006] Regarding the beneficial effects of the present invention, when it is necessary to eject foam, the air supply pump unit pressurizes the air in the air mixing tank chamber to increase the internal pressure of the air mixing tank chamber. At this time, the ventilation valve structure is closed, and the soap solution in the air mixing tank enters the mixing passage from the drainage passage under the action of pressure. At the same time, the air in the air mixing tank chamber also enters the mixing passage from the exhaust passage under the action of pressure. The air and the soap solution are mixed in the mixing passage to form foam and then are ejected together from the mixing passage, thereby realizing the ejection of foam. When the soap solution in the air mixing tank chamber is ejected, the liquid level of the soap solution in the air mixing tank chamber drops. At this time, the soap solution in the liquid replenishment tank is supplied into the air mixing tank chamber through the liquid replenishment check valve until the air pressure balance between the air mixing tank chamber and the liquid replenishment tank is reached, that is, until the liquid level heights of the air mixing tank chamber and the liquid replenishment tank are the same. At this time, the ventilation valve structure is maintained in an open state to communicate the air mixing tank chamber with the outside. When the soap solution in the liquid replenishment tank is supplied into the air mixing tank chamber, at the same time, the bottle mouth at the lower end of the liquid replenishment bottle is fitted into the liquid replenishment tank from the fitting port. Therefore, when the liquid level of the liquid replenishment tank drops, the soap solution in the liquid replenishment bottle replenishes the liquid replenishment tank. When the liquid level height in the liquid replenishment tank exceeds the bottle mouth, the liquid replenishment stops, thereby ensuring the amount of soap solution inside the liquid replenishment tank. This foam generator can realize foam generation by one air supply pump unit, and can also realize automatic liquid supply and liquid replenishment by the mechanical structure among the liquid replenishment bottle, the liquid replenishment tank and the air mixing tank chamber under the action of atmospheric pressure, realizing large-capacity use and eliminating the need for frequent liquid replenishment.

[0007] As a further improvement of the above technical solution, the ventilation valve structure includes a ventilation passage for communicating the air mixing tank chamber with the outside and a counterweight plug movably provided up and down in the ventilation passage. The ventilation passage is provided with a ventilation exhaust end and a ventilation intake end vertically. The counterweight plug is configured to move upward under the action of the high-pressure air force in the air mixing tank chamber to block the ventilation exhaust end.

[0008] In the ventilation valve structure of the present technical solution, mechanical occlusion is achieved by a counterweight plug. When the liquid supply tank supplies liquid to the air mixing tank chamber, the air pressure in the air mixing tank chamber is low. At this time, the counterweight plug rises due to the air pressure, but it has not yet reached the level of closing the ventilation exhaust end. Therefore, the ventilation passage is in a through state. At this time, the air mixing tank chamber communicates with the outside, and the liquid supply tank can supply liquid to the air mixing tank chamber. When the air supply pump unit pressurizes the air in the air mixing tank chamber, the air pressure in the air mixing tank chamber is very high. The high-pressure air pushes the counterweight plug upward so that the counterweight plug closes the ventilation exhaust end. At this time, the ventilation passage is in a closed state, and the bubble generator is in a bubble ejection state. Regarding the weight of the counterweight plug, those skilled in the art may determine it according to the actual operating air pressure, and it will not be described in detail in the present invention.

[0009] As a further improvement of the above technical solution, an annular placement step for supporting the counterweight plug is provided at the ventilation intake end, and the counterweight plug is spherical. The annular placement step mainly serves to support the counterweight plug, avoid the fall of the counterweight plug, and ensure that the counterweight plug can be pushed upward by the air. The ventilation exhaust end has a trumpet-shaped structure with a small upper part and a large lower part. A ventilation gap is formed between the spherical counterweight plug and the inner wall of the ventilation passage.

[0010] As a further improvement of the above technical solution, the gas-liquid mixing structure includes a fitting groove provided in the upper part of the air mixing tank chamber and a hollow fitting member fitted in the fitting groove. The mixing passage is provided above the fitting groove and communicates with the fitting groove. The exhaust passage is provided between the outer wall of the fitting member and the inner wall of the fitting groove. A drain pipe is connected to the fitting member, and the drain passage is formed in the drain pipe and the fitting member.

[0011] The gas-liquid mixing structure in the present technical solution mainly realizes gas-liquid mixing. It is formed by fitting the fitting member into the fitting groove in the upper part of the air mixing tank chamber. The structure is simpler and there is no need to manufacture it with a very complicated mold.

[0012] In other technical solutions, the ventilation valve structure includes a sleeve provided on the outer wall of the upper part of the air mixing tank chamber. An insertion column fixed to the outer wall of the air mixing tank chamber is provided in the sleeve. A fitting gap is formed between the sleeve and the insertion column. A ventilation groove opening communicating with the air mixing tank chamber is provided at the bottom of the fitting gap. An inverted barrel-shaped ventilation cover is fitted in the fitting gap. A micro-ventilation hole structure is provided on the upper part of the ventilation cover. The outer peripheral wall of the ventilation cover is in sealed contact with the inner peripheral wall of the sleeve. A plurality of ventilation grooves are formed between the inner wall of the ventilation cover and the outer wall of the insertion column. Both ends of the ventilation grooves communicate with the micro-ventilation hole structure and the ventilation groove opening respectively.

[0013] In other technical solutions, the ventilation valve structure can be a series of flow control devices such as electromagnetic valves and microporous membranes.

[0014] As a further improvement of the above technical solution, the number of the exhaust passages is plural, and the plural exhaust passages are annularly provided with a gap between the outer wall of the fitting member and the inner wall of the fitting groove.

[0015] The plural exhaust passages can mix air and soap liquid more uniformly. Air enters from the periphery of the mixing passage and is mixed with the soap liquid.

[0016] As a further improvement of the above technical solution, a liquid filling valve structure is provided at the bottle mouth, and a liquid filling pushing structure for abutting against the liquid filling valve structure to open the liquid filling valve structure is provided in the liquid filling tank.

[0017] Since the liquid filling bottle is installed upside down, when the liquid filling bottle is replaced, if soap liquid remains inside, it will cause the scattering of the soap liquid. In this technical solution, a liquid filling valve structure is provided at the bottle mouth. When the liquid filling pushing structure pushes the liquid filling valve structure, the bottle mouth is opened. When the liquid filling pushing structure separates from the liquid filling valve structure, the liquid filling valve structure closes the bottle mouth, thereby avoiding the scattering phenomenon of the soap liquid.

[0018] Specifically, the liquid replenishing valve structure includes a liquid replenishing valve cover fitted to the bottle mouth and a liquid replenishing valve core rod extending vertically. A liquid replenishing valve port is provided on the liquid replenishing valve cover. A liquid replenishing elastic member is provided between the liquid replenishing valve core rod and the liquid replenishing valve cover. A closing step is provided on the outer peripheral wall of the liquid replenishing valve core rod. The liquid replenishing elastic member provides a downward acting force on the liquid replenishing valve core rod such that the closing step closes the liquid replenishing valve port. The lower end of the liquid replenishing valve core rod extends from the liquid replenishing valve port and abuts against the liquid replenishing pushing structure.

[0019] In the free state of the liquid replenishing valve structure in this technical solution, the closing step closes the liquid replenishing valve port by the liquid replenishing elastic member. When the lower end of the liquid replenishing valve core rod abuts against the liquid replenishing pushing structure and the liquid replenishing valve core rod is pushed upward, the closing step separates from the liquid replenishing valve port, and thus the liquid replenishing valve port is in a through state.

[0020] A guide frame is fixedly provided inside the liquid replenishing valve cover. The guide frame is provided with a first guide hole that fits slidably up and down with the upper end of the liquid replenishing valve core rod. A contact step is provided on the outer periphery of the liquid replenishing valve core rod. The liquid replenishing elastic member acts between the contact step and the bottom of the first guide hole.

[0021] The liquid replenishing pushing structure includes a liquid replenishing pushing platform provided at the bottom of the liquid replenishing tank. The liquid replenishing elastic member is a spring fitted on the outer periphery of the liquid replenishing valve core rod.

[0022] As a further improvement of the above technical solution, the foam generating mechanism further includes a foam atomization unit. The foam atomization unit is connected to the outlet of the mixing passage through a pipe. The air supply pump unit includes an air supply pump. The air supply pump is connected to the air inlet through an air pipe.

[0023] This technical solution is further provided with a foam atomization unit for atomizing the foam of the mixture of the soap liquid and air.

[0024] As a further improvement of the above technical solution, the liquid replenishment check valve includes an umbrella-shaped valve core provided in an extended manner, a liquid replenishment through hole provided in the upper part of the air mixing tank chamber, and a second guide hole. The umbrella-shaped valve core includes a valve bonnet and a valve stem. The valve stem is slidably fitted with the second guide hole. The liquid replenishment through hole is provided below the valve bonnet. The liquid replenishment through hole communicates with the liquid replenishment tank. The number of the liquid replenishment through holes is plural, and the plural liquid replenishment through holes are annularly provided at intervals around the axis of the valve stem.

[0025] The liquid replenishment check valve in the present technical solution is realized by the structure of the umbrella-shaped valve core. The valve stem is slidably fitted with the second guide hole. In the free state, the umbrella-shaped valve core moves downward due to its gravity. At this time, the valve bonnet closes the liquid replenishment through hole. When liquid supply is performed, the liquid pushes the umbrella-shaped valve core upward. At this time, the valve bonnet opens the liquid replenishment through hole. By providing a limiting protrusion at the lower end of the valve stem, it is possible to prevent the umbrella-shaped valve core from detaching from the second guide hole. The plural liquid replenishment through holes can increase the liquid supply speed.

[0026] In other technical solutions, the liquid replenishment check valve can be a fluid control device such as a solenoid valve or a check valve.

[0027] Hereinafter, the present invention will be further described with reference to the drawings and embodiments.

Brief Description of the Drawings

[0028]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying out the Invention

[0029] In this part, specific embodiments of the present invention will be described in detail. Better embodiments of the present invention are shown in the drawings. The role of the drawings is to supplement the description in the literal part of the specification with graphics, so that each technical feature and the overall technical solution of the present invention can be understood intuitively and imaginatively. However, it should not be understood as limiting the protection scope of the present invention.

[0030] In the description of the present invention, the orientation or positional relationship indicated by the description of directions such as "upper", "lower", "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings. It is only for facilitating the description of the present invention and simplifying the description, and does not indicate or imply that the device or element mentioned must have a specific orientation or be configured and operate in a specific orientation. Therefore, it should not be understood as limiting the present invention.

[0031] In the description of the present invention, if there is a vocabulary description such as "several", its meaning is one or more, the meaning of "a plurality" is two or more, and terms such as "greater than", "less than", "exceeding" do not include the number, while terms such as "above", "below", "within" include the number.

[0032] In the description of the present invention, unless otherwise clearly defined, terms such as "provide", "attach", "connect", etc. should be understood in a broad sense, and those skilled in the art may reasonably determine the specific meaning of the above terms in the present invention with reference to the specific content of the technical solution.

[0033] As shown in FIGS. 1 to 5, the downward-installed large-capacity single air pump foam generator of the present invention is implemented as follows in the following embodiments.

[0034] The downward-installed large-capacity single air pump foam generator of this embodiment includes a liquid replenishment mechanism and a foam generation mechanism.

[0035] The liquid replenishment mechanism includes a liquid replenishment tank 100 and a liquid replenishment bottle 200. An upward-opening fitting port 110 is provided in the liquid replenishment tank 100. The lower end of the liquid replenishment bottle 200 is fitted into the liquid replenishment tank 100 from the fitting port 110. The liquid replenishment tank 100 communicates with the outside, and a bottle mouth is provided at the lower end of the liquid replenishment bottle 200.

[0036] The foam generation mechanism includes an air supply pump unit, an air mixing tank chamber 300, a gas-liquid mixing structure provided at the upper part of the air mixing tank chamber 300, an air inlet 310, and a ventilation valve structure 320. The lower part of the air mixing tank chamber 300 communicates with the lower part of the liquid replenishment tank 100. A liquid replenishment check valve 400 is provided between the air mixing tank chamber 300 and the liquid replenishment tank 100. The communication direction of the liquid replenishment check valve 400 is from the liquid replenishment tank 100 to the air mixing tank chamber 300. The air supply pump unit is connected to the air inlet 310. The ventilation valve structure 320 communicates the air mixing tank chamber 300 with the outside. A liquid discharge passage 330, an air exhaust passage 340, and a mixing passage 350 are provided in the gas-liquid mixing structure. The inlet end of the liquid discharge passage 330 extends downward into the bottom of the air mixing tank chamber 300. The inlet end of the air exhaust passage 340 and the air inlet 310 both communicate with the upper part of the air mixing tank chamber 300. The outlet end of the liquid discharge passage 330 and the outlet end of the air exhaust passage 340 respectively communicate with the inlet of the mixing passage 350.

[0037] The air supply pump unit in this embodiment includes an air supply pump 800. The air supply pump 800 is connected to the air inlet 310 through an air pipe, and a foam atomization unit 700 is further provided. The foam atomization unit 700 is connected to the outlet of the mixing passage 350 through a pipe.

[0038] When it is necessary to eject bubbles, the air supply pump unit pressurizes the air in the air mixing tank chamber 300 to increase the internal pressure of the air mixing tank chamber 300. At this time, the ventilation valve structure 320 is closed, and the soap solution in the air mixing tank enters the mixing passage 350 from the drain passage 330 under the action of pressure. At the same time, the air in the air mixing tank chamber 300 also enters the mixing passage 350 from the exhaust passage 340 under the action of pressure. The air and the soap solution are mixed in the mixing passage 350 to form bubbles and then are ejected together from the mixing passage 350, thereby realizing the ejection of bubbles. When the soap solution in the air mixing tank chamber 300 is ejected, the liquid level of the soap solution in the air mixing tank chamber 300 drops. At this time, the soap solution in the liquid supply tank 100 is supplied into the air mixing tank chamber 300 through the liquid supply check valve 400 until the air pressure balance between the air mixing tank chamber 300 and the liquid supply tank 100 is reached, that is, until the liquid levels of the air mixing tank chamber 300 and the liquid supply tank 100 are the same. At this time, the ventilation valve structure 320 is maintained in the open state to communicate the air mixing tank chamber 300 with the outside. When the soap solution in the liquid supply tank 100 is supplied into the air mixing tank chamber 300, at the same time, the bottle mouth at the lower end of the liquid supply bottle 200 is fitted into the liquid supply tank 100 from the fitting port 110. Therefore, when the liquid level of the liquid supply tank 100 drops, the soap solution in the liquid supply bottle 200 is replenished into the liquid supply tank 100. When the liquid level of the liquid supply tank 100 exceeds the bottle mouth, the liquid supply stops, thereby ensuring the amount of soap solution inside the liquid supply tank 100. This bubble generator can realize the generation of bubbles by one air supply pump unit. Also, under the action of atmospheric pressure, automatic liquid supply and liquid replenishment can be realized by the mechanical structure among the liquid supply bottle 200, the liquid supply tank 100, and the air mixing tank chamber 300, realizing large-capacity use and eliminating the need for frequent liquid replenishment.

[0039] The ventilation valve structure 320 includes a ventilation passage 321 that communicates the air mixing tank chamber 300 with the outside, and a counterweight plug 322 that is provided in the ventilation passage 321 so as to be vertically movable. In the ventilation passage 321, a ventilation exhaust end 323 and a ventilation intake end 324 are provided vertically. The counterweight plug 322 is configured to move upward under the action of the high-pressure air in the air mixing tank chamber 300 to block the ventilation exhaust end 323. The ventilation valve structure 320 of this embodiment realizes mechanical blockage by the counterweight plug 322. When the liquid supply tank 100 supplies liquid to the air mixing tank chamber 300, the air pressure in the air mixing tank chamber 300 is low. At this time, the counterweight plug 322 rises due to the air pressure, but has not yet reached the level of blocking the ventilation exhaust end 323, so the ventilation passage 321 is in a penetrating state. At this time, the air mixing tank chamber 300 communicates with the outside, and the liquid supply tank 100 can supply liquid to the air mixing tank chamber 300. When the air supply pump unit pressurizes the air in the air mixing tank chamber 300, the air pressure in the air mixing tank chamber 300 is very high. The high-pressure air pushes the counterweight plug 322 upward so that the counterweight plug 322 blocks the ventilation exhaust end 323. At this time, the ventilation passage 321 is in a closed state, and the bubble generator is in a bubble ejection state. Regarding the weight of the counterweight plug 322, those skilled in the art may determine it according to the actual operating air pressure, and it will not be described in detail in the present invention.

[0040] Further, an annular mounting step 325 for supporting the counterweight plug 322 is provided at the ventilation intake end 324, and the counterweight plug 322 is spherical. The annular mounting step 325 mainly serves to support the counterweight plug 322, avoid the fall of the counterweight plug 322, and ensure that the counterweight plug 322 can be pushed upward by the air. The ventilation exhaust end 323 has a trumpet-shaped structure with a small upper part and a large lower part. A ventilation gap is formed between the spherical counterweight plug 322 and the inner wall of the ventilation passage 321.

[0041] The gas-liquid mixing structure of this embodiment includes a fitting groove 360 provided in the upper part of the air mixing tank chamber 300 and a hollow fitting member 370 fitted in the fitting groove 360. The mixing passage 350 is provided above the fitting groove 360 and communicates with the fitting groove 360. The exhaust passage 340 is provided between the outer wall of the fitting member 370 and the inner wall of the fitting groove 360. A drain pipe 371 is connected to the fitting member 370, and the drain passage 330 is formed in the drain pipe 371 and the fitting member 370. The structure is simpler and does not require manufacturing with a very complex mold.

[0042] Also, the number of the exhaust passages 340 is plural. The plural exhaust passages 340 are annularly provided at intervals between the outer wall of the fitting member 370 and the inner wall of the fitting groove 360. The plural exhaust passages 340 can mix air and soap liquid more uniformly. Air enters from around the mixing passage 350 and is mixed with the soap liquid.

[0043] Furthermore, since the liquid replenishment bottle 200 is installed upside down, when the liquid replenishment bottle 200 is replaced, if soap liquid remains inside, it will cause the scattering of the soap liquid. To avoid the scattering phenomenon of the soap liquid, a liquid replenishment valve structure is provided at the bottle mouth. The liquid replenishment tank 100 is provided with a liquid replenishment pushing structure for abutting against the liquid replenishment valve structure to open the liquid replenishment valve structure. When the liquid replenishment pushing structure pushes the liquid replenishment valve structure, the bottle mouth is opened. When the liquid replenishment pushing structure separates from the liquid replenishment valve structure, the liquid replenishment valve structure closes the bottle mouth. Specifically, the liquid replenishment valve structure includes a liquid replenishment valve cover 500 fitted in the bottle mouth and a liquid replenishment valve core rod 510 extending vertically. A liquid replenishment valve port 520 is provided on the liquid replenishment valve cover 500. A liquid replenishment elastic member 530 is provided between the liquid replenishment valve core rod 510 and the liquid replenishment valve cover 500. A closing step 511 is provided on the outer peripheral wall of the liquid replenishment valve core rod 510. The liquid replenishment elastic member 530 provides a downward acting force on the liquid replenishment valve core rod 510 so that the closing step 511 closes the liquid replenishment valve port 520. The lower end of the liquid replenishment valve core rod 510 extends from the liquid replenishment valve port 520 and abuts against the liquid replenishment pushing structure.

[0044] In the free state of the liquid filling valve structure, the liquid filling elastic member 530 closes the closing step 511 against the liquid filling valve port 520. When the lower end of the liquid filling valve core rod 510 abuts against the liquid filling pushing structure and the liquid filling valve core rod 510 is pushed upward, the closing step 511 separates from the liquid filling valve port 520, and thus the liquid filling valve port 520 becomes a through state.

[0045] A guide frame 540 is fixedly provided inside the liquid filling valve cover 500. The guide frame 540 is provided with a first guide hole 531 that is vertically slidably fitted with the upper end of the liquid filling valve core rod 510. A contact step 512 is provided on the outer periphery of the liquid filling valve core rod 510. The liquid filling elastic member 530 is provided to act between the contact step 512 and the bottom of the first guide hole 531.

[0046] The liquid filling pushing structure in this embodiment includes a liquid filling pushing table 600 provided at the bottom of the liquid filling tank 100. The liquid filling elastic member 530 is a spring fitted on the outer periphery of the liquid filling valve core rod 510.

[0047] The liquid replenishment check valve 400 in this embodiment includes an umbrella-shaped valve core provided to extend, a liquid replenishment through hole 410 provided in the upper part of the air mixing tank chamber 300, and a second guide hole 420. The umbrella-shaped valve core includes a valve bonnet 430 and a valve stem 440. The valve stem 440 is slidably fitted with the second guide hole 420 in the vertical direction. The liquid replenishment through hole 410 is provided below the valve bonnet 430. The liquid replenishment through hole 410 communicates with the liquid replenishment tank 100. The number of the liquid replenishment through holes 410 is plural. The plural liquid replenishment through holes 410 are annularly provided at intervals around the axis of the valve stem 440. The liquid replenishment check valve 400 is realized by the structure of the umbrella-shaped valve core. The valve stem 440 is slidably fitted with the second guide hole 420. In the free state, the umbrella-shaped valve core moves downward due to its gravity. At this time, the valve bonnet 430 closes the liquid replenishment through hole 410. When liquid supply is performed, the liquid pushes the umbrella-shaped valve core upward. At this time, the valve bonnet 430 opens the liquid replenishment through hole 410. By providing a limiting protrusion at the lower end of the valve stem 440, it is possible to prevent the umbrella-shaped valve core from detaching from the second guide hole 420. The plural liquid replenishment through holes 410 can increase the liquid supply speed.

[0048] In some other embodiments, the liquid replenishment check valve 400 may use other check valve structures as long as the one-way flow of the liquid can be realized.

[0049] In some other embodiments, the ventilation valve structure 320 may use other structures. For example, a micro ventilation hole structure 900 may be used. The air mixing tank chamber 300 communicates with the external environment through the micro ventilation hole structure 900. When the air supply pump unit does not operate, it plays the role of air pressure balance, liquid replenishment and exhaust. When the air supply pump unit pressurizes the air mixing tank chamber 300, a small amount of air is discharged from the micro ventilation hole structure 900, and these small amounts of air can be ignored and do not affect the bubble ejection. As shown in FIG. 6, a sleeve 910 is fixedly provided on the outer wall of the upper part of the air mixing tank chamber 300. An insertion column 920 fixed to the outer wall of the air mixing tank chamber 300 is provided in the sleeve 910. A fitting gap 930 is formed between the sleeve 910 and the insertion column 920. A ventilation groove opening 940 communicating with the air mixing tank chamber 300 is provided at the bottom of the fitting gap 930. An inverted barrel-shaped ventilation cover 950 is fitted in the fitting gap 930. A micro ventilation hole structure 900 is provided on the upper part of the ventilation cover 950. The outer peripheral wall of the ventilation cover 950 is in sealed contact with the inner peripheral wall of the sleeve 910. A plurality of ventilation grooves 960 are formed between the inner wall of the ventilation cover 950 and the outer wall of the insertion column 920. Both ends of the ventilation groove 960 communicate with the micro ventilation hole structure 900 and the ventilation groove opening 940 respectively.

[0050] As described above, the preferred embodiments of the present invention have been specifically described. However, the present invention is not limited to the above embodiments. Those skilled in the art may make various equivalent modifications or substitutions without departing from the spirit of the present invention, and all of these equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A downward-installed large-capacity single air pump foam generator, comprising: A liquid replenishing mechanism including a liquid replenishing tank (100) and a liquid replenishing bottle (200). An upwardly opening fitting port (110) is provided in the liquid replenishing tank (100). The lower end of the liquid replenishing bottle (200) is fitted into the liquid replenishing tank (100) from the fitting port (110). The liquid replenishing tank (100) communicates with the outside, and a bottle mouth is provided at the lower end of the liquid replenishing bottle (200); A foam generating mechanism including an air supply pump unit, an air mixing tank chamber (300), a gas-liquid mixing structure provided at the upper part of the air mixing tank chamber (300), an air inlet (310) and a ventilation valve structure (320). The lower part of the air mixing tank chamber (300) communicates with the lower part of the liquid replenishing tank (100). A liquid replenishing check valve (400) is provided between the air mixing tank chamber (300) and the liquid replenishing tank (100). The flow direction of the liquid replenishing check valve (400) is from the liquid replenishing tank (100) to the air mixing tank chamber (300). The air supply pump unit is connected to the air inlet (310). The ventilation valve structure (320) communicates the air mixing tank chamber (300) with the outside. A liquid discharge passage (330), an air exhaust passage (340), and a mixing passage (350) are provided in the gas-liquid mixing structure. The inlet end of the liquid discharge passage (330) extends downward into the bottom of the air mixing tank chamber (300). The inlet end of the air exhaust passage (340) and the air inlet (310) both communicate with the upper part of the air mixing tank chamber (300). The outlet end of the liquid discharge passage (330) and the outlet end of the air exhaust passage (340) respectively communicate with the inlet of the mixing passage (350). The ventilation valve structure (320) includes a sleeve (910) provided on the outer wall of the upper part of the air mixing tank chamber 300. A fitting post (920) fixed to the outer wall of the air mixing tank chamber (300) is provided in the sleeve (910). A fitting gap (930) is formed between the sleeve (910) and the fitting post (920). A ventilation groove opening (940) communicating with the air mixing tank chamber (300) is provided at the bottom of the fitting gap (930). An inverted barrel-shaped ventilation cover (950) is fitted in the fitting gap (930). A micro ventilation hole structure (900) is provided on the upper part of the ventilation cover (950). The outer peripheral wall of the ventilation cover (950) is in sealing contact with the inner peripheral wall of the sleeve (910). A plurality of ventilation grooves (960) are formed between the inner wall of the ventilation cover (950) and the outer wall of the fitting post (920). Both ends of the ventilation groove (960) communicate with the micro ventilation hole structure (900) and the ventilation groove opening (940) respectively. The downward installation type large-capacity single air pump foam generator, characterized by the above.

2. The gas-liquid mixing structure includes a fitting groove (360) provided in the upper part inside the air mixing tank chamber (300), and a hollow fitting member (370) fitted in the fitting groove (360). The mixing passage (350) is provided above the fitting groove (360) and communicates with the fitting groove (360). The exhaust passage (340) is provided between the outer wall of the fitting member (370) and the inner wall of the fitting groove (360). A drain pipe (371) is connected to the fitting member (370). The drain passage (330) is formed in the drain pipe (371) and the fitting member (370). The downward installation type large-capacity single air pump foam generator according to claim 1, characterized by the above.

3. The number of the exhaust passages (340) is plural. The plural exhaust passages (340) are annularly provided at intervals between the outer wall of the fitting member (370) and the inner wall of the fitting groove (360). The downward installation type large-capacity single air pump foam generator according to claim 2, characterized by the above.

4. A liquid replenishment valve structure is provided at the bottle mouth. The liquid replenishment tank (100) is provided with a liquid replenishment pushing structure for abutting against the liquid replenishment valve structure to open the liquid replenishment valve structure. The downward installation type large-capacity single air pump foam generator according to claim 1, characterized by the above.

5. The liquid replenishing valve structure includes a liquid replenishing valve cap (500) fitted to the bottle mouth and a liquid replenishing valve core rod (510) provided to extend vertically. A liquid replenishing valve port (520) is provided in the liquid replenishing valve cap (500). A liquid replenishing elastic member (530) is provided between the liquid replenishing valve core rod (510) and the liquid replenishing valve cap (500). A closing step (511) is provided on the outer peripheral wall of the liquid replenishing valve core rod (510). The liquid replenishing elastic member (530) provides a downward acting force on the liquid replenishing valve core rod (510) such that the closing step (511) closes the liquid replenishing valve port (520). The lower end of the liquid replenishing valve core rod (510) extends from the liquid replenishing valve port (520) and abuts against the liquid replenishing pushing structure. The downward installation type large-capacity single air pump foam generating device according to claim 4, characterized in that

6. A guide frame (540) is fixedly provided inside the liquid replenishing valve cap (500). A first guide hole (531) is provided in the guide frame (540) to fit slidably up and down with the upper end of the liquid replenishing valve core rod (510). A contact step (512) is provided on the outer periphery of the liquid replenishing valve core rod (510). The liquid replenishing elastic member (530) acts between the contact step (512) and the bottom of the first guide hole (531). The downward installation type large-capacity single air pump foam generating device according to claim 5, characterized in that

7. The foam generating mechanism further includes a foam refinement unit (700). The foam refinement unit (700) is connected to the outlet of the mixing passage (350) via a pipe. The air supply pump unit includes an air supply pump (800). The air supply pump (800) is connected to the air intake port (310) via an air pipe. The downward installation type large-capacity single air pump foam generating device according to claim 1, characterized in that

8. The liquid replenishment check valve (400) includes an umbrella-shaped valve core provided in an extended manner, a liquid replenishment through hole (410) provided at the lower part of the air mixing tank chamber (300), and a second guide hole (420). The umbrella-shaped valve core includes a valve bonnet (430) and a valve stem (440). The valve stem (440) is slidably fitted with the second guide hole (420) in the vertical direction. The liquid replenishment through hole (410) is provided below the valve bonnet (430). The liquid replenishment through hole (410) communicates with the liquid replenishment tank (100). The number of the liquid replenishment through holes (410) is plural. The plural liquid replenishment through holes (410) are provided in an annular shape at intervals around the axis of the valve stem (440). The downward installation type large-capacity single air pump foam generator according to claim 1, characterized in that.

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