An automatic liquid mixing foam machine

Abstract

The application provides an automatic liquid-mixing foam machine, which comprises a gear pump for extracting washing liquid, a stirring and mixing device, a foam generating device, a foam outlet nozzle, a water storage tank and a liquid storage tank, the input end of the stirring and mixing device is connected with the output end of the gear pump, the input end of the foam generating device is connected with the output end of the stirring and mixing device, the output end of the foam generating device is connected with the foam outlet nozzle, the liquid storage tank is connected with the input end of the gear pump, and the water storage tank is connected with the output end of the gear pump. The foam machine has the advantages that the washing liquid and water can be automatically extracted and stirred and mixed according to the required proportion, the foam is fine, and the manufacturing cost is low.

Description

[Technical Field]

[0001] This invention relates to the field of foam machine product technology, and in particular to an automatic mixing foam machine. [Background Technology]

[0002] Foam machines use an electric foam pump to pump liquid and gas into a gas-liquid mixing chamber for mixing, enabling the detergent to be sprayed directly as foam without repeated rubbing, thus providing users with a better user experience.

[0003] Currently, foam machines are mostly used in handwashing settings, but rarely in other settings such as showers. The main reason is that existing foam machines typically cannot automatically dilute and prepare the mixture. However, for detergents like shower gel and shampoo, dilution is generally not allowed before sale to ensure efficacy. Nevertheless, there is still significant demand for foam machines in other settings such as showers. For example, in showering, users need to manually rub the product repeatedly to generate foam each time they dispense shower gel or shampoo, which is very inconvenient. This is especially true when adults bathe infants; one hand must hold the baby, and the other hand must dispense shower gel or shampoo and rub repeatedly. Infants' skin is very delicate and cannot be directly rubbed on their bodies. This is difficult for one person to complete alone. Therefore, there is an urgent need for a foam machine that can automatically mix the liquid, produce fine foam, and has low manufacturing costs. [Summary of the Invention]

[0004] In view of the above-mentioned defects in the existing technology, the purpose of the present invention is to provide an automatic mixing foam machine, which can automatically extract detergent and water according to the required ratio for stirring and mixing, and produce fine foam with low manufacturing cost.

[0005] The present invention is implemented as follows: an automatic liquid mixing foam machine, including a gear pump for drawing detergent liquid.

[0006] Furthermore, it also includes a stirring and mixing device, the input end of which is connected to the output end of the gear pump.

[0007] Furthermore, it also includes a foam generating device and a foam outlet, wherein the input end of the foam generating device is connected to the output end of the mixing device, and the output end of the foam generating device is connected to the foam outlet.

[0008] Furthermore, it also includes a water storage tank and a liquid storage tank, wherein the liquid storage tank is connected to the input end of the gear pump, and the water storage tank is connected to the output end of the gear pump.

[0009] Furthermore, it also includes a housing, a triggering device, and a control mainboard. The gear pump, stirring and mixing device, foam generating device, and control mainboard are all located inside the housing, while the foam outlet, water storage tank, liquid storage tank, and triggering device are all located outside the housing. The foam generating device is provided with an air intake passage that communicates with the outside of the housing. The gear pump, stirring and mixing device, foam generating device, and triggering device are all electrically connected to the control mainboard.

[0010] Furthermore, the gear pump and the mixing device share a housing and a drive unit, the mixing device is a gear mixing device, and both the gear pump and the mixing device use plastic gears.

[0011] Furthermore, a filter device and a check valve are installed between the water storage tank and the input end of the gear pump.

[0012] Furthermore, the output end of the foam generating device is equipped with a backflow preventer to prevent foam from overflowing when it is not in operation.

[0013] Furthermore, a detachable foaming core is provided inside the foaming nozzle.

[0014] Furthermore, the liquid storage tank is detachably connected to the housing.

[0015] By adopting the technical solution of the present invention, at least the following beneficial effects are achieved:

[0016] 1. By applying gear pumps to foam machines, the gear pumps have advantages such as strong resistance to impurities and low clogging. Therefore, they are well-suited for quantitative extraction of detergents with high viscosity and impurities, such as shower gel and shampoo, without causing clogging.

[0017] 2. Connecting the water storage tank to the output end of the gear pump allows water from the storage tank to be delivered to the output end of the gear pump during operation. Due to the surface tension of water, the water wets the inside of the gear pump and fills the internal gaps to create a water seal, ensuring a good vacuum is formed on the disengaged side of the gear. Therefore, the technical solution of this invention reduces the precision requirements of the gears while ensuring effective vacuum formation, thereby reducing the manufacturing cost of the gear pump.

[0018] 3. By designing a system that utilizes a gear pump to extract the washing liquid separately, and connecting the water storage tank to the output of the gear pump, the required water can be directly drawn from the water storage tank using the suction of the foam generator during operation. The combined operation of the gear pump and the foam generator ensures accurate and timely mixing of the washing liquid and water in the desired ratio, eliminating the need for an additional power source for water extraction and reducing costs. Furthermore, a mixing device is installed between the gear pump and the foam generator to thoroughly mix the washing liquid extracted by the gear pump and the water extracted by the foam generator, ensuring a uniform and effective foam generation.

[0019] 4. By designing the gear pump and mixing device to share a single housing and drive unit, the overall structure of the gear pump and mixing device becomes more compact, small, and aesthetically pleasing, which is beneficial for the miniaturization of the final product. On the other hand, it reduces manufacturing costs. At the same time, designing the mixing device as a gear agitator can effectively disperse the washing liquid and mix it thoroughly with water, thus ensuring the uniformity of the resulting mixture. In addition, both the gear pump and the mixing device use plastic gears, which helps to further reduce manufacturing costs.

[0020] 5. By leaving a first gap between the second driving gear and the second driven gear and the side wall of the second chamber, and a second gap between the lower end of the elastic support boss and the upper surface of the second driving gear and the second driven gear, it can be ensured that a vacuum will not be formed in the second chamber when the second driving gear and the second driven gear are working. In this way, the washing liquid can only be drawn separately by the gear pump, while the water can only be drawn by the foam generating device, which can more accurately draw the washing liquid and water for mixing. The present invention also designs an elastic pressing member with an elastic pressing boss that abuts against the upper surface of the first driving gear and the first driven gear. Since the elastic pressing boss is elastic, it can apply downward pressure to the first driving gear and the first driven gear, thereby ensuring that there is no gap between the upper surface of the first driving gear and the first driven gear and the bottom of the elastic pressing boss, which can ensure the sealing effect.

[0021] 6. By forming a support step at the upper end of the first and second chambers, and designing an elastic clamping member with an elastic support plate supported on the support step, and the upper end of the elastic support plate being higher than the upper end of the bottom shell body, the support requirements for the elastic clamping member can be met. After the upper cover plate is placed on the top of the first and second chambers, the upper cover plate can press down the elastic support plate and cooperate with the support step to clamp the elastic support plate, thereby achieving a sealing effect and ensuring that no liquid leakage occurs.

[0022] 7. By installing a filter device and a check valve between the water storage tank and the input end of the gear pump, the filter device can filter the water delivered to the gear pump, making it difficult for impurities in the water to enter the gear pump. On the other hand, the check valve can prevent backflow, ensuring that the washing liquid and water entering the gear pump will not flow back into the water storage tank, thus avoiding pollution of the water in the water storage tank.

[0023] 8. A check valve is installed at the output end of the foam generator so that when the foam generator stops working, the check valve can prevent foam from overflowing, thus avoiding waste and not affecting the appearance of the foam machine.

[0024] 9. The foaming nozzle is equipped with a detachable foaming core and a detachable end cap. This allows for the segmentation of the foam output from the foam generator to produce fine foam, and also facilitates the replacement or disassembly of the detachable foaming core for cleaning.

[0025] 10. By detachably connecting the liquid storage tank to the casing, the liquid storage tank can be easily disassembled, replaced, or cleaned in the event of a return, thus facilitating resale. [Attached Image Description]

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] Figure 1 This is a complete drawing of the foam machine of the present invention;

[0028] Figure 2 This is a structural diagram of the foam machine of the present invention after the machine casing has been removed;

[0029] Figure 3 This is an exploded view of the foam generating device in this invention at the location where the anti-reverse cover is set;

[0030] Figure 4 This is an internal structural diagram of the connecting body in this invention;

[0031] Figure 5 This is an assembly diagram of the gear pump, mixing device, and drive device in this invention with the top cover removed.

[0032] Figure 6 This is an internal structural diagram of the gear pump and stirring mixing device in this invention;

[0033] Figure 7 This is an exploded view of the gear pump and mixing device in this invention when the upper cover plate is removed;

[0034] Figure 8This is a cross-sectional view of the gear pump and mixing device in this invention along the middle position;

[0035] Figure 9 This is a cross-sectional view of the mixing device in this invention when the top cover plate is removed;

[0036] Figure 10 This is a cross-sectional view of the gear pump in this invention when the upper cover plate is removed;

[0037] Figure 11 This is a structural diagram of the main body of the bottom shell in this invention;

[0038] Figure 12 This is a structural diagram of the upper cover plate in this invention;

[0039] Figure 13 This is an exploded view of the foam nozzle and the liquid storage tank in the foam machine of the present invention;

[0040] Figure 14 This is a cross-sectional view of the insertion post of the liquid storage tank and the insertion groove of the housing during insertion in this invention;

[0041] Figure 15 This is a cross-sectional view of the insertion pipe of the liquid storage tank and the insertion cavity of the machine housing during insertion in this invention;

[0042] Figure 16 This is an internal structural diagram of the second main housing in this invention;

[0043] Figure 17 This is a structural diagram of the hook and water tank support in the housing of the present invention;

[0044] Figure 18 This is a bottom structural diagram of the second main box in this invention;

[0045] Figure 19 This is a structural diagram of a one-way valve installed on the lower surface of the connecting body in this invention.

[0046] Explanation of reference numerals in the attached figures:

[0047] Foam machine 100;

[0048] Gear pump 1, first driving gear 11, first limiting protrusion 111, first driven gear 12, second limiting protrusion 121, first drive shaft 13, first driven shaft 14;

[0049] The mixing device 2 includes a second driving gear 21, a third limiting protrusion 211, a second driven gear 22, a fourth limiting protrusion 221, a second drive shaft 23, and a second driven shaft 24.

[0050] Foam generator 3, air inlet 31, check valve 32, foam nozzle 33, foam outlet orifice 34;

[0051] Foaming nozzle 4, detachable foaming core 41, detachable end cap 42, foaming core assembly cavity 43;

[0052] Water storage tank 5, filter device 51, one-way valve 52, hook groove 53, retaining notch 54, inner and outer sleeves 55, positioning pin 56, first main body 57, first top cover 58.

[0053] Liquid storage tank 6, plug-in post 61, blind hole 611, plug-in pipe 62, support step 621, locking part 63, second sealing ring 64, second filter screen 65, second connecting groove 66, clamping part 67, assembly post 671, clamping ring 672, second main body 68, second top cover 69.

[0054] 7. Housing 7, hook 71, water tank support 72, positioning groove 721, positioning pin hole 7211, inner sleeve 722, insertion groove 73, insertion cavity 74, connecting pipe 75.

[0055] Triggering device 8;

[0056] The components include: a housing 9, a supporting step 90, a first chamber 91, a liquid inlet groove 911, a liquid inlet opening 912, a vertical water inlet groove 913, a horizontal water inlet groove 914, a water inlet opening 915, a first arc-shaped end face 916, a first limiting groove 917, a second limiting groove 918, a second chamber 92, a drain groove 921, a drain opening 922, a second arc-shaped end face 923, a third limiting groove 924, a fourth limiting groove 925, and a first wear-resistant plate 93. Third clearance recess 931, second wear-resistant plate 94, fourth clearance recess 941, bottom shell body 95, top cover plate 96, first connecting groove 97, connecting body 98, water inlet channel 981, air inlet channel 982, water inlet pipe 983, air inlet pipe 984, elastic clamping part 99, elastic abutting boss 991, first clearance recess 9911, elastic support boss 992, second clearance recess 9921, elastic support plate 993, cavity 994;

[0057] Drive unit 10, drive motor 101, reduction gear set 102.

Detailed Implementation Methods

[0058] To better understand the technical solution of the present invention, the technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0059] It should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing these embodiments and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature.

[0060] Please see Figures 1 to 19 As shown, this invention discloses an automatic mixing foam machine 100, which includes a gear pump 1 for extracting detergent liquid. When the gear pump 1 is working, the volume of the space on the disengaged side of the gear increases to create a vacuum, thereby drawing detergent liquid into the gear pump 1; the volume of the space on the meshing side of the gear decreases to discharge the drawn-in detergent liquid. Because the gear pump 1 has advantages such as strong resistance to impurities and low clogging, its application in the foam machine 100 is well-suited for quantitatively extracting detergent liquids with high viscosity and containing impurities, such as shower gel and shampoo, without causing clogging.

[0061] In this invention, the foam machine 100 further includes a stirring and mixing device 2. The input end of the stirring and mixing device 2 is connected to the output end of the gear pump 1. The washing liquid output by the gear pump 1 can enter the stirring and mixing device 2 and be stirred, mixed and diluted with water to prepare a mixture suitable for producing foam.

[0062] In this invention, the foam machine 100 further includes a foam generating device 3 and a foam outlet 4. The input end of the foam generating device 3 is connected to the output end of the mixing device 2, and the output end of the foam generating device 3 is connected to the foam outlet 4. During operation, the foam generating device 3 can draw the prepared mixture from the output end of the mixing device 2 and mix the mixture with air to generate foam, which is then output through the foam outlet 4.

[0063] In this invention, the foam machine 100 further includes a water storage tank 5 and a liquid storage tank 6. The water storage tank 5 is used to store water, and the liquid storage tank 6 is used to store detergent, which may be shower gel, shampoo, etc. The liquid storage tank 6 is connected to the input end of the gear pump 1, so that the gear pump 1 can draw detergent from the liquid storage tank 6. The water storage tank 5 is connected to the output end of the gear pump 1. Since gear pump 1 mainly relies on the vacuum formed on the gear disengagement side to draw in washing liquid, existing gear pumps require high precision gears to effectively create a vacuum on the gear disengagement side, necessitating precision machining of the gears, resulting in high manufacturing costs for the entire gear pump. This invention cleverly connects the water storage tank 5 to the output end of gear pump 1, allowing water from the storage tank 5 to be first delivered to the output end of gear pump 1 during operation. Due to the surface tension of water, after being delivered to the output end of gear pump 1, the water wets the interior of gear pump 1 and fills the internal gaps, acting as a water seal, thus ensuring a good vacuum is formed on the gear disengagement side. Therefore, through the technical solution of this invention, the precision requirements for the gears can be reduced while ensuring effective vacuum formation, thereby reducing the manufacturing cost of gear pump 1. Of course, as another specific embodiment of this invention, when using a high-precision gear pump 1, the water storage tank 5 can also be connected to the input end of the stirring and mixing device 2.

[0064] This invention utilizes a gear pump 1 to extract washing liquid independently, and connects a water storage tank 5 to the output end of the gear pump 1. During operation, the required water can be directly extracted from the water storage tank 5 using the suction of the foam generating device 3. Through the cooperation of the gear pump 1 and the foam generating device 3, the washing liquid and water can be extracted and mixed accurately in the required ratio in real time, without the need for an additional power mechanism for water extraction, thus helping to reduce costs. At the same time, a stirring and mixing device 2 is provided between the gear pump 1 and the foam generating device 3, which can fully stir the washing liquid extracted by the gear pump 1 and the water extracted by the foam generating device 3, so that the washing liquid and water are fully mixed evenly, thereby ensuring that the foam generating device 3 can generate foam better and guarantee the effect of use.

[0065] In this invention, the foam machine 100 further includes a housing 7, a triggering device 8, and a control main board (not shown). The gear pump 1, the mixing device 2, the foam generating device 3, and the control main board are all housed inside the housing 7, so that the housing 7 can protect the gear pump 1, the mixing device 2, the foam generating device 3, and the control main board. The foam outlet 4, the water tank 5, the liquid tank 6, and the triggering device 8 are all housed outside the housing 7. The foam generating device 3 is provided with an air inlet passage 31 that communicates with the outside of the housing 7, so that the foam generating device 3 can draw air from the outside and mix it with the mixed liquid output by the mixing device 2 to generate foam. The gear pump 1, the mixing device 2, the foam generating device 3, and the triggering device 8 are all electrically connected to the control main board. During operation, the control main board can receive the trigger signal generated by the triggering device 8 and control the gear pump 1, the mixing device 2, the foam generating device 3, and the triggering device 8 to work based on the trigger signal.

[0066] In some embodiments of the present invention, please refer to the following: Figures 5 to 12 As shown, the gear pump 1 and the mixing device 2 share a housing 9 and a drive device 10. The mixing device 2 is a gear-driven mixing device, and both the gear pump 1 and the mixing device 2 use plastic gears. The housing 9 is also made of plastic. This invention, by designing the gear pump 1 and the mixing device 2 to share a housing 9 and a drive device 10, achieves two advantages: firstly, it makes the overall structure of the gear pump 1 and the mixing device 2 more compact, small, and aesthetically pleasing, thus facilitating the miniaturization of the final product; secondly, it reduces manufacturing costs. Furthermore, designing the mixing device 2 as a gear-driven mixing device effectively disperses the washing liquid and mixes it thoroughly with water, ensuring the uniformity of the resulting mixture. Additionally, the use of plastic gears in both the gear pump 1 and the mixing device 2, along with the plastic housing 9, further helps to reduce manufacturing costs. It should be noted that: because plastic gears have relatively low precision, the gear pump 1 only uses plastic gears when the water storage tank 5 is connected to the output end of the gear pump 1. In this case, water can be used to act as a water seal, thereby compensating for the low precision of the plastic gears; while the stirring and mixing device 2 mainly plays a stirring role, and has low requirements for the precision of gear meshing, so the stirring and mixing device 2 can directly use plastic gears.

[0067] More specifically, the housing 9 has a first chamber 91 and a second chamber 92. The gear pump 1 includes a first driving gear 11 and a first driven gear 12 that are disposed in the first chamber 91 and mesh with each other. Specifically, the first driving gear 11 and the first driven gear 12 are close to or attached to the bottom wall of the first chamber 91, so that there is no gap or only a very small gap between the lower surface of the first driving gear 11 and the first driven gear 12 and the bottom wall of the first chamber 91, thereby facilitating the use of water to achieve a water seal effect. The stirring device 2 includes a second driving gear 21 and a second driven gear 22 disposed within the second chamber 92 and meshing with each other. When water and washing liquid pass through the second driving gear 21 and the second driven gear 22, the second driving gear 21 and the second driven gear 22 can effectively disperse the washing liquid and fully mix it with the water, thereby ensuring the uniformity of the resulting mixture. Specifically, the lower surfaces of the second driving gear 21 and the second driven gear 22 are close to or attached to the bottom wall of the second chamber 92, such that the lower surfaces of the second driving gear 21 and the second driven gear 22 are in contact with the bottom wall of the second chamber 92. There is no gap or only a very small gap between the bottom walls of the second gear 21 and the second driven gear 22, making it difficult for water and washing liquid to pass directly between the lower surfaces of the second driving gear 21 and the second driven gear 22 and the bottom wall of the second chamber 92, thus ensuring the stirring effect. This invention utilizes a gear pump 1 to separately extract the washing liquid, and the stirring device 2 also employs a gear structure for stirring. Because gears have good anti-impurity properties, they can effectively prevent clogging during the preparation of the mixture, while effectively dispersing the washing liquid and fully mixing it with water, ensuring the uniformity of the water and washing liquid mixture. A first gap is left between the second driving gear 21 and the second driven gear 22 and the side wall of the second chamber 92. The size of this first gap can be set according to actual needs, ensuring that the second driving gear 21 and the second driven gear 22 do not create a vacuum in the second chamber 92 during operation, meaning the stirring device 2 itself does not generate suction. This allows the washing liquid to be extracted only by the gear pump 1, while water can only be extracted by the foam generating device 3.

[0068] More specifically, the top of the first chamber 91 and the second chamber 92 are provided with elastic clamping members 99. The elastic clamping members 99 have elastic abutting bosses 991 that tightly cooperate with the cavity wall of the first chamber 91 and elastic supporting bosses 992 that tightly cooperate with the cavity wall of the second chamber 92. That is, the side wall of the elastic abutting bosses 991 is in contact with the cavity wall of the first chamber 91, and the elastic supporting bosses 992 are in contact with the cavity wall of the second chamber 92. The lower end of the elastic abutting bosses 991 is lower than the lower end of the elastic supporting bosses 992, that is, there is a height difference between the elastic abutting bosses 991 and the elastic supporting bosses 992. The lower end of the elastic abutting bosses 991 abuts against the upper surfaces of the first driving gear 11 and the first driven gear 12 to achieve a seal. A second gap is left between the lower end of the elastic supporting bosses 992 and the upper surfaces of the second driving gear 21 and the second driven gear 22. The size of the second gap can be set according to actual needs. This invention ensures that a first gap is left between the second driving gear 21 and the second driven gear 22 and the side wall of the second chamber 92, and a second gap is left between the lower end of the elastic support boss 992 and the upper surface of the second driving gear 21 and the second driven gear 22. This prevents a vacuum from forming in the second chamber 92 when the second driving gear 21 and the second driven gear 22 are working. In this way, the washing liquid can only be drawn by the gear pump 1 alone, while the water can only be drawn by the foam generating device 3, which allows for more accurate extraction and mixing of washing liquid and water. This invention also designs an elastic pressing member 99 with an elastic abutting boss 991 that abuts against the upper surface of the first driving gear 11 and the first driven gear 12. Because the elastic abutting boss 991 is elastic, it can apply downward pressure to the first driving gear 11 and the first driven gear 12, thereby ensuring that there is no gap between the upper surface of the first driving gear 11 and the first driven gear 12 and the bottom of the elastic abutting boss 991, thus ensuring a sealing effect.

[0069] Furthermore, a first wear-resistant plate 93 is provided at the bottom of the elastic abutment boss 991. The lower surface of the first wear-resistant plate 93 abuts against the upper surface of the first driving gear 11 and the first driven gear 12. That is, the first wear-resistant plate 93 will be tightly attached to the upper surface of the first driving gear 11 and the first driven gear 12 under the pressure applied by the elastic abutment boss 991. A second wear-resistant plate 94 is provided at the bottom of the elastic support boss 992. A second gap is left between the lower surface of the second wear-resistant plate 94 and the upper surface of the second driving gear 21 and the second driven gear 22. Since the first driving gear 11, the first driven gear 12, the second driving gear 21, and the second driven gear 22 all need to rotate continuously during operation, in order to prevent the first driving gear 11, the first driven gear 12, the second driving gear 21, and the second driven gear 22 from causing wear on the bottom of the elastic abutment boss 991 and the elastic support boss 992 during rotation, the present invention adopts a first wear-resistant plate 93 provided at the bottom of the elastic abutment boss 991, and a second wear-resistant plate 94 provided at the bottom of the elastic support boss 992. This can effectively prevent the bottom of the elastic abutment boss 991 and the elastic support boss 992 from being worn, and can ensure the sealing effect. Preferably, both the first wear-resistant plate 93 and the second wear-resistant plate 94 are made of POM wear-resistant material. POM wear-resistant material has good wear resistance, which can improve the service life of the first wear-resistant plate 93 and the second wear-resistant plate 94. At the same time, the POM wear-resistant plate has a low coefficient of friction, which minimizes its impact on the first driving gear 11, the first driven gear 12, the second driving gear 21, and the second driven gear 22. However, the invention is not limited to this. In specific implementations, the first wear-resistant plate 93 and the second wear-resistant plate 94 can also be made of other materials, such as nylon. The elastic clamping member 99 can be made of silicone. However, the invention is not limited to this. In specific implementations, the elastic clamping member 99 can also be made of other materials, such as rubber.

[0070] Furthermore, the rotational speeds of the second driving gear 21 and the second driven gear 22 are greater than those of the first driving gear 11 and the first driven gear 12. Since the second driving gear 21 and the second driven gear 22 primarily function as a stirrer, they need to rotate rapidly to ensure more uniform mixing. In contrast, the first driving gear 11 and the first driven gear 12 primarily function as extracts the washing liquid, and since the amount of washing liquid extracted each time is small, they need to rotate slowly.

[0071] Furthermore, the housing 9 includes a bottom shell body 95 and an upper cover plate 96. The first chamber 91 and the second chamber 92 are formed within the bottom shell body 95, and a supporting step 90 is formed at the upper end of the first chamber 91 and the second chamber 92. The upper cover plate 96 covers the top of the first chamber 91 and the second chamber 92. By designing the housing 9 to include a bottom shell body 95 and an upper cover plate 96, this invention facilitates the installation of the first driving gear 11 and the first driven gear 12 into the first chamber 91, the second driving gear 21 and the second driven gear 22 into the second chamber 92, and the installation of the elastic clamping member 99 into the first chamber 91 and the second chamber 92 during specific implementation. 92. After installation, the upper cover plate 96 needs to be connected to the upper end of the bottom shell body 95. In specific implementation, the upper cover plate 96 and the bottom shell body 95 can be locked together using locking components (such as screws or bolts). The elastic pressing member 99 has an elastic support piece 993 supported on the support step 90, and the upper end of the elastic support piece 993 is higher than the upper end of the bottom shell body 95. The elastic abutment boss 991 and the elastic support boss 992 are formed at the bottom of the elastic support piece 993, and the upper surface of the elastic support piece 993 has a cavity 994 at the position corresponding to the elastic abutment boss 991 and the elastic support boss 992. The present invention features a support step 90 formed at the upper end of the first chamber 91 and the second chamber 92, and an elastic clamping member 99 with an elastic support piece 993 supported on the support step 90, wherein the upper end of the elastic support piece 993 is higher than the upper end of the bottom shell body 95. This satisfies the support requirements for the elastic clamping member 99, and after the upper cover plate 96 is placed on top of the first chamber 91 and the second chamber 92, the upper cover plate 96 can press down the elastic support piece 993 and cooperate with the support step 90 to clamp the elastic support piece 993. The tightness ensures a seal and prevents liquid leakage. Furthermore, since the thickness of the first driving gear 11, the first driven gear 12, the second driving gear 21, and the second driven gear 22 is generally small in practice, the elastic abutment boss 991 and elastic support boss 992 formed at the bottom of the elastic support plate 993 can also compensate for the height difference between the first driving gear 11, the first driven gear 12, the second driving gear 21, the second driven gear 22 and the support step 90.

[0072] Furthermore, the first chamber 91 and the second chamber 92 are interconnected via a first connecting groove 97, allowing the washing liquid and water output from the gear pump 1 to enter the input end of the stirring device 2 through the first connecting groove 97. The first chamber 91 has a vertically extending inlet groove 911 on its side wall away from the first connecting groove 97. The top of the housing 9 has an inlet opening 912 that communicates with the inlet groove 911. The side wall of the elastic abutment protrusion 991 is shaped at the position corresponding to the inlet groove 911. The first clearance recess 9911 is formed, allowing the washing liquid in the storage tank 6 to better enter the gear pump 1. The second chamber 92 has a vertically extending drainage groove 921 on the side wall away from the first connecting groove 97. The top of the housing 9 has a drainage opening 922 that communicates with the drainage groove 921. The side wall of the elastic support boss 992 has a second clearance recess 9921 at the position corresponding to the drainage groove 921, allowing the mixed liquid after stirring to be better output to the foam generating device 3. At the same time, the first wear-resistant plate 93 has a third clearance recess 931 on both sides, and the second wear-resistant plate 94 has a fourth clearance recess 941 on both sides, allowing the liquid to better enter and exit the gear pump 1 and the stirring device 2. Preferably, the liquid inlet groove 911, the first clearance recess 9611 and the third clearance recess 931 are located at positions corresponding to the meshing of the first driving gear 11 and the first driven gear 12, and the liquid outlet groove 921, the second clearance recess 9621 and the fourth clearance recess 941 are located at positions corresponding to the meshing of the second driving gear 21 and the second driven gear 22.

[0073] In order to enable the water entering the gear pump 1 to diffuse to various positions better and faster, thereby achieving a better water seal effect, the first chamber 91 has a vertical water inlet groove 913 on the side wall near the first connecting groove 97, and the vertical water inlet groove 913 extends to the bottom of the first chamber 91. The top of the bottom shell body 95 is provided with a horizontal water inlet groove 914 that communicates with the vertical water inlet groove 913. The top of the shell 9 has a water inlet opening 915 that communicates with the horizontal water inlet groove 914. The water storage tank 5 is connected to the water inlet opening 915. It should be noted that, in a preferred embodiment of the present invention, the liquid inlet 912, the liquid outlet 922, and the water inlet 915 are all located on the top of the housing 9, and all three pass through the elastic support piece 993. After the upper cover plate 96 is connected to the upper end of the bottom housing body 95, the upper cover plate 96 can also cooperate with the elastic support piece 993 to separate the liquid inlet 912, the liquid outlet 922, and the water inlet 915 from each other, ensuring that they do not interfere with each other. Of course, the present invention is not limited to this, and in specific implementations, they can be arranged in other positions according to actual needs.

[0074] Furthermore, the first chamber 91 has first arc-shaped end faces 916 at both ends that tightly engage with the first driving gear 11 and the first driven gear 12, respectively. This ensures that there are only small gaps between one end of the first chamber 91 and the first driving gear 11, and between the other end of the first chamber 91 and the first driven gear 12, thereby guaranteeing a water seal effect. The second chamber 92 has second arc-shaped end faces 923 at both ends that engage with the second driving gear 21 and the second driven gear 22, respectively. Of course, the first gap remains between the second arc-shaped end face 923 and the second driving gear 21 and the second driven gear 22, so that the stirring device 2 itself will not generate suction when the second driving gear 21 and the second driven gear 22 are working.

[0075] Furthermore, to ensure the working stability of the gears in the gear pump 1 and the stirring device 2, the first driving gear 11 is connected to the driving device 10 via the first drive shaft 13. The first driving gear 11 and the first drive shaft 13 are fixedly connected. The lower surface of the first driving gear 11 is provided with a first limiting protrusion 111 around the first drive shaft 13. The bottom wall of the first chamber 91 is formed with a first limiting groove 917 that cooperates with the first limiting protrusion 111, so that the first limiting protrusion 111 and the first limiting groove 917 cooperate to achieve The first driving gear 11 is limited; the first driven gear 12 is fixedly connected to the bottom wall of the first chamber 91 through the first driven shaft 14, and the first driven gear 12 and the first driven shaft 14 are rotatably connected. The lower surface of the first driven gear 12 is provided with a second limiting protrusion 121 around the first driven shaft 14, and the bottom wall of the first chamber 91 is formed with a second limiting groove 918 that cooperates with the second limiting protrusion 121, so that the first driven gear 12 is limited by the cooperation of the second limiting protrusion 121 and the second limiting groove 918. Similarly, the second driving gear 21 is connected to the driving device 10 via the second drive shaft 23. The second driving gear 21 and the second drive shaft 23 are fixedly connected. A third limiting protrusion 211 is provided on the lower surface of the second driving gear 21 around the second drive shaft 23. A third limiting groove 924 is formed on the bottom wall of the second chamber 92 to cooperate with the third limiting protrusion 211, thereby limiting the second driving gear 21 through the cooperation of the third limiting protrusion 211 and the third limiting groove 924. The second driven gear 22 is fixedly connected to the bottom wall of the second chamber 92 via the second driven shaft 24. The second driven gear 22 and the second driven shaft 24 are rotatably connected. The lower surface of the second driven gear 22 is provided with a fourth limiting protrusion 221 around the second driven shaft 24. The bottom wall of the second chamber 92 is formed with a fourth limiting groove 925 that cooperates with the fourth limiting protrusion 221, so as to limit the second driven gear 22 by the cooperation of the fourth limiting protrusion 221 and the fourth limiting groove 925.

[0076] More specifically, the drive device 10 is fixed to the bottom of the housing 9, and the drive device 10 includes a drive motor 101 and a reduction gear set 102. The reduction gear set 102 has one input end and two output ends. The drive motor 101 is connected to the input end of the reduction gear set 102. One output end of the reduction gear set 102 is connected to the first drive shaft 13, and the other output end of the reduction gear set 102 is connected to the second drive shaft 23, thereby realizing the simultaneous operation of the gear pump 1 and the stirring device 2 by using one drive motor 101.

[0077] Of course, in other embodiments of the present invention, without considering cost and volume, the gear pump 1 and the mixing device 2 may be provided with separate housings 9 and drive devices 10.

[0078] In some embodiments of the present invention, please refer to the following: Figures 17 to 19 As shown, a filter device 51 and a one-way valve 52 are installed between the water storage tank 5 and the input end of the gear pump 1. By installing the filter device 51 and the one-way valve 52 between the water storage tank 5 and the input end of the gear pump 1, on the one hand, the filter device 51 can filter the water delivered to the gear pump 1, making it difficult for impurities in the water to enter the gear pump 1; on the other hand, the one-way valve 52 can prevent backflow, ensuring that the washing liquid and water entering the gear pump 1 do not flow back into the water storage tank 5, thus avoiding contamination of the water in the water storage tank 5.

[0079] More specifically, the water storage tank 5 is detachably mounted on the side wall of the housing 7, so that the water storage tank 5 can be separated from the housing 7, thereby facilitating the filling or cleaning of the water storage tank 5.

[0080] Furthermore, a hook 71 is fixedly provided on the side wall of the housing 7, and a hook groove 53 is provided on the side wall of the water tank 5. The water tank 5 is hung on the side wall of the housing 7 through the cooperation of the hook groove 53 and the hook 71. At the same time, a water tank support base 72 is fixedly provided on the side wall of the housing 7 below the hook 71. The water tank 5 has a retaining notch 54 on the side facing the housing 7 that engages with the water tank support base 72. The stability of the water tank 5 can be ensured by the cooperation of the hook groove 53 and the hook 71 and the retaining notch 54 and the water tank support base 72. A positioning groove 721 is formed on the water tank support base 72, and an inner sleeve 722 is fixedly installed in the positioning groove 721. The filter device 51 is a first filter screen fixed to the upper end of the inner sleeve 722. An outer sleeve 55 communicating with the inside of the water storage tank 5 is provided at the bottom of the water storage tank 5. The outer sleeve 55 is sleeved on the outside of the inner sleeve 722, and a first sealing ring (not shown) is provided between the outer sleeve 55 and the inner sleeve 722 to ensure that water cannot flow out from the gap between the outer sleeve 55 and the inner sleeve 722. At the same time, since the outer sleeve 55 and the inner sleeve 722 are detachably connected, the filter device 51 can be easily cleaned or replaced. Positioning pins 56 are fixed on both sides of the outer sleeve 55 at the bottom of the water storage tank 5. The bottom of the positioning groove 721 has positioning pin holes 7211 that cooperate with the positioning pins 56, and the positioning pins 56 are inserted into the positioning pin holes 7211.

[0081] Furthermore, to facilitate filling the water storage tank 5 with water, the water storage tank 5 includes a first main tank body 57 and a first upper cover 58 covering the top of the first main tank body 57. When it is necessary to add water to the first main tank body 57, the first upper cover 58 can be opened, and after adding water, the first upper cover 58 can be closed again.

[0082] More specifically, the top of the housing 9 is fixedly connected to the foam generating device 3 via a connecting body 98, making the gear pump 1, the stirring device 2, and the foam generating device 3 a single unit. Furthermore, the connecting body 98 includes a sealed upper plate and a lower plate, with the lower plate of the connecting body 98 directly serving as the upper cover 96 of the housing 9. The connecting body 98 contains a water inlet channel 981 communicating with the water inlet opening 915 and an air inlet channel 982 communicating with the foam generating device 3. This air inlet channel 982 is a component of the air inlet path 31. The one-way valve 52 is a check cover located at the bottom of the connecting body 98 (that is, the one-way valve 52 is a check cover located at the bottom of the upper cover plate 96, and the check cover can be a rubber cover). The one-way valve 52 is located at the position where the water inlet opening 915 is connected to the water inlet channel 981. When working, the one-way valve 52 will be pulled down by the suction force provided by the foam generating device 3, so that the water inlet channel 981 is connected to the water inlet opening 915, thereby realizing the water pumping function. When the foam generating device 3 is not working, the one-way valve 52 returns to its original position and sticks to the lower surface of the connecting body 98, thereby playing a role in preventing backflow. The external part of the connecting body 98 is provided with a water inlet pipe 983 connected to the water inlet channel 981 and an air inlet pipe 984 connected to the air inlet channel 982. The water inlet pipe 983 is connected to the inner sleeve 722, and the air inlet pipe 984 is connected to the outside of the housing 7. The air inlet pipe 984 is also a component of the air inlet passage 31.

[0083] In some embodiments of the present invention, please refer to the following: Figure 3 As shown, the output end of the foam generating device 3 is equipped with a backflow preventer 32 to prevent foam from overflowing when not in operation. The backflow preventer 32 can be made of rubber. Since a small amount of foam usually overflows from the output end of the foam generating device 3 immediately after it stops working, this not only causes waste but also affects the aesthetics of the entire foam machine 100. Therefore, this invention uses a backflow preventer 32 at the output end of the foam generating device 3 to prevent foam from overflowing when the foam generating device 3 stops working, thereby avoiding waste and preserving the aesthetics of the foam machine 100.

[0084] More specifically, a foam nozzle 33 is fixedly mounted on the upper end of the foam generating device 3, and a check cover 32 is fixedly mounted inside the foam nozzle 33. A foam output hole 34 is formed on the top surface of the foam generating device 3, and the lower end of the check cover 32 covers the foam output hole 34. When the foam generating device 3 is working, the foam will push the check cover 32 upward under the power provided by the foam generating device 3, so that the foam can be output through the foam nozzle 33. When the foam generating device 3 is not working, the check cover 32 will return to its original position and cover the foam output hole 34, so as to ensure that the foam will not overflow when it is not working.

[0085] In some embodiments of the present invention, please refer to the following: Figure 13 As shown, a detachable foaming core 41 is provided inside the foaming nozzle 4. The foaming nozzle 4 is equipped with a detachable end cap 42, and a foaming core assembly cavity 43 is formed inside the foaming nozzle 4 facing the detachable end cap 42. The detachable foaming core 41 is installed in the foaming core assembly cavity 43. By providing a detachable foaming core 41 inside the foaming nozzle 4 and providing a detachable end cap 42, this invention allows for the segmentation of the foam output from the foam generating device 3 using the detachable foaming core 41, thereby achieving the output of fine foam. It also facilitates the replacement or disassembly and cleaning of the detachable foaming core 41.

[0086] In some embodiments of the present invention, please refer to the following: Figures 13 to 16 As shown, the liquid storage tank 6 is detachably connected to the housing 7, and the liquid storage tank 6 is located on the top of the housing 7. Since returns of the foam machine 100 are unavoidable during actual sales, and washing liquid remains in the liquid storage tank 6 after use, it is difficult to resell the returned foam machine 100. Therefore, this invention detachably connects the liquid storage tank 6 to the housing 7, allowing for easy disassembly, replacement, or cleaning of the liquid storage tank 6 in case of returns, thus facilitating resale.

[0087] More specifically, the top of the housing 7 has a insertion groove 73 and an insertion cavity 74. The insertion groove 73 is not connected to the interior of the housing 7, and the insertion cavity 74 is connected to the liquid inlet opening 912 through a connecting pipe 75. The bottom of the liquid storage tank 6 has an insertion post 61 tightly fitted into the insertion groove 73 and an insertion pipe 62 tightly fitted into the insertion cavity 74. The insertion post 61 is locked and fixed to the bottom wall of the insertion groove 73 by a locking member 63, which is a screw or bolt. A second sealing ring 64 is provided between the insertion post 61 and the insertion groove 73 to achieve a sealing effect. A second filter screen 65 is provided in the insertion pipe 62 to filter the washing liquid. A third sealing ring (not shown) is provided between the insertion cavity 74 and the insertion pipe 62 to achieve a sealing effect.

[0088] Furthermore, a blind hole 611 is formed at the upper end of the insertion post 61, and the locking member 63 passes through the bottom wall of the blind hole 611 through the insertion post 61 and is locked and fixed together with the bottom wall of the insertion groove 73; a supporting step 621 is formed in the insertion pipe 62, and the second filter screen 65 is disposed on the supporting step 621; the upper end of the blind hole 611 is connected to the upper end of the insertion cavity 74 through the second connecting groove 66, and a pressing member 67 is disposed in the second connecting groove 66. One end of the pressing member 67 is provided with an assembly post 671 that is tightly inserted into the blind hole 611, and the other end of the pressing member 67 is provided with a pressing ring 672 that presses the second filter screen 65. In practical use, when it is necessary to replace the liquid storage tank 6, the clamping part 67 needs to be removed from the second connecting groove 66 first, and then the locking part 63 needs to be loosened to separate the plug post 61 from the bottom wall of the plug groove 73, so that the liquid storage tank 6 can be removed for replacement. At the same time, when the clamping part 67 is removed, the second filter screen 65 can also be replaced or cleaned.

[0089] Furthermore, the liquid storage tank 6 includes a second main tank 68 and a second upper cover 69 covering the top of the second main tank 68. When it is necessary to add washing liquid to the second main tank 68, the second upper cover 69 can be opened, and after adding the washing liquid, the second upper cover 69 can be closed again.

[0090] In some embodiments of the present invention, the triggering device 8 may be implemented using a push-button switch, an infrared sensor, or the like.

[0091] In practical use, the foam machine 100 of the present invention can also perform quantitative water extraction through the foam generating device 3, that is, the amount of water extracted by the foam generating device 3 each time is fixed; while the gear pump 1 can extract different amounts of detergent liquid by controlling the output speed of the drive motor 101. For example, multiple control levels can be set for the gear pump 1, and the amount of detergent liquid extracted by each control level is different. Since different detergent products have different viscosities, the amount of detergent liquid that needs to be extracted during dilution is naturally different. Therefore, by setting multiple control levels for the gear pump 1, the user can select the required control level according to the different viscosities of the detergent liquid, so that the foam machine 100 can be used for the dilution of various detergent products, with a wide range of applications and is more convenient to use.

[0092] The overall working principle of the foam machine 100 of the present invention is as follows: When foam needs to be output by the foam machine 100 for cleaning, the user generates a trigger signal by operating the trigger device 8 and transmits the trigger signal to the control main board; the control main board controls the gear pump 1, the stirring device 2 and the foam generating device 3 to start working. The foam generating device 3 draws water from the water storage tank 5 according to the required ratio. The drawn water enters the gear pump 1 from the output end of the gear pump 1. The water entering the gear pump 1 can wet the first driving gear 11 and the first driven gear 12, thereby achieving a water seal effect; at the same time, the gear pump 1 draws washing liquid from the liquid storage tank 6 according to the required ratio. The drawn washing liquid and water enter the stirring device 2 together. The stirring device 2 fully stirs and mixes the washing liquid and water and delivers the uniformly mixed liquid to the foam generating device 3; the foam generating device 3 draws air from the outside and mixes it with the mixed liquid to generate foam. The foam is output through the foam outlet 4.

[0093] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. An automatic liquid mixing foam machine characterized by: The device comprises a gear pump for extracting washing liquid, a stirring and mixing device, a foam generating device, a foam outlet nozzle, a water storage tank and a liquid storage tank; the input end of the stirring and mixing device is connected with the output end of the gear pump, the input end of the foam generating device is connected with the output end of the stirring and mixing device, the output end of the foam generating device is connected with the foam outlet nozzle, the liquid storage tank is connected with the input end of the gear pump, and the water storage tank is connected with the output end of the gear pump. The foam generating device extracts water from the water storage tank according to a required ratio, and the extracted water enters the gear pump from the output end of the gear pump, and the water entering the gear pump can soak the first driving gear and the first driven gear and fill the internal gap of the gear pump to play a water sealing role, so as to ensure that a vacuum can be formed on the gear disengagement side; the gear pump extracts washing liquid from the liquid storage tank according to a required ratio, and the extracted washing liquid and water enter the stirring device together, the stirring device fully stirs and mixes the washing liquid and water, and delivers the mixed liquid to the foam generating device.

2. An automatic liquid foam machine as claimed in claim 1, characterized in that: The device further comprises a casing, a trigger device and a control mainboard, the gear pump, the stirring and mixing device, the foam generating device and the control mainboard are arranged in the casing, the foam outlet nozzle, the water storage tank, the liquid storage tank and the trigger device are arranged outside the casing, the foam generating device is provided with an air inlet channel connected with the outside of the casing; the gear pump, the stirring and mixing device, the foam generating device and the trigger device are electrically connected with the control mainboard.

3. An automatic liquid foam machine as claimed in claim 1, characterized in that: The gear pump and the stirring and mixing device share a shell and a driving device, the stirring and mixing device adopts a gear stirring device, and the gear pump and the stirring and mixing device both adopt plastic gears.

4. An automatic liquid foam machine as claimed in claim 1, characterized in that: A filter device and a one-way valve are arranged between the water storage tank and the input end of the gear pump.

5. An automatic liquid foam machine as claimed in claim 1, characterized in that: The output end of the foam generating device is provided with a reverse prevention cover for preventing foam from overflowing outward when the device is not working.

6. An automatic liquid foam machine as claimed in claim 1, characterized in that: The foam outlet nozzle is provided with a detachable foaming core.

7. An automatic liquid foam machine as claimed in claim 2, characterized in that: The liquid storage tank is detachably connected with the casing.

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