Gas-liquid mixing device for preparing microbubble water and microbubble water preparation device

Abstract

The present invention discloses a gas-liquid mixing device for preparing microbubble water, which comprises a closed container. The closed container is separated by a partition into a laterally adjacent and sealed mixing chamber and a premixing chamber; a movable sealing structure is installed in the premixing chamber for separating the premixing chamber into a water chamber and a gas chamber, and the gas chamber is located above the water chamber; a first one-way valve for introducing gas into the gas chamber and a water inlet interface for introducing water into the water chamber are respectively arranged at the upper end and the lower end of the closed container, a water inlet valve is installed at the water inlet interface, a second one-way valve for introducing gas into the mixing chamber is arranged at the upper end of the partition, a water supply interface communicated with a water supply pipe located in the mixing chamber is arranged at the lower end of the partition, and a water spraying port of the water supply pipe is located in the upper part of the mixing chamber; a mixed water and gas outlet is arranged at the lower end of the mixing chamber; the movable sealing structure moves longitudinally between the lower one-way valve among the first one-way valve and the second one-way valve and the upper interface among the water inlet interface and the water supply interface; when the water inlet valve is opened and the water spraying port of the water supply pipe sprays water, the pressure in the mixing chamber is less than the pressure in the gas chamber.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and particularly to a gas-liquid mixing device and a microbubble water preparation device for preparing microbubble water. Background Art

[0002] The interior of microbubble water is filled with a large number of tiny bubbles and appears milky white under visual effects. Microbubble water is formed by mixing water and air, and the diameter of the internal bubbles is generally between 1 and 100 microns. Microbubble water has strong decontamination ability and is widely used in fields such as skin cleansing, fruit and vegetable washing, and sewage treatment.

[0003] The device for preparing microbubble water generally includes a water inlet pipeline, an air inlet pipeline, a gas mixing tank, and an outlet module. Tap water enters the gas mixing tank through the water inlet pipeline, air enters the gas mixing tank through the air inlet pipeline, and the air and water are mixed in the gas mixing tank to form a gas-liquid mixture. The gas-liquid mixture enters the outlet module to form microbubble water. Since the external air pressure is less than the tap water pressure, without a pressurization device, air cannot enter the gas mixing tank and needs to be pressurized by an air pump or a high-pressure gas cylinder to be introduced into the gas mixing tank. When using an air pump to pressurize air, the pressure is usually below 0.15 Mpa. When the water pressure in the gas mixing tank is higher than 0.15 MPa, the air pump cannot pump air into the gas mixing tank. In addition, the air pump needs to be powered on during operation, resulting in high costs; when using the air in a high-pressure gas cylinder for mixing, due to the large space occupied by the high-pressure gas cylinder and the need for frequent gas replacement, the cost is high, it is inconvenient to use, and it affects the user experience.

[0004] To solve the above problems brought by the pressurization device in the microbubble water preparation device, there is a microbubble water machine on the market, as Figure 1 shown, a gas mixing container b is installed in a water tank a. An air inlet c and a water inlet d are respectively arranged at the upper end of the water tank a. Among them, a one-way valve for air intake is arranged at the air inlet c, and a drain port e and an outlet f are arranged at the lower end of the water tank d. The outlet f is connected to a bubble generator g (a water outlet shower head) through a pipeline; when it is necessary to introduce air into the gas mixing container b, the water inlet d is closed and the drain port e is opened, and the negative pressure in the water tank d is used to realize the entry of air from the one-way valve into the gas mixing container b, so that water and air are mixed; when the user needs to use microbubble water, the drain port e is closed, the water inlet d and the outlet f are opened, and microbubble water is obtained after passing through the bubble generator g (the water outlet shower head); when the air in the gas mixing container b is used up, the water inlet d is closed again and the drain port e is opened, and the water in the gas mixing container b is emptied to realize the entry of air. This product is complex to use, wastes water, and cannot continuously produce microbubble water. Summary of the Invention

[0005] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a gas-liquid mixing device for preparing microbubble water. This device does not require an air pressurization device, has a simple structure, reduces costs, and can continuously output microbubble water.

[0006] To achieve the above object, the technical solution of the present invention is as follows:

[0007] The gas-liquid mixing device for preparing microbubble water provided by the present invention includes a sealed container, which is divided by a partition into a laterally adjacent and sealed mixing chamber and a premixing chamber; a movable sealing structure is installed in the premixing chamber to divide the premixing chamber into a water chamber and a gas chamber, and the gas chamber is located above the water chamber;

[0008] A first one-way valve for introducing gas into the gas chamber and a water inlet interface for introducing water into the water chamber are respectively provided at the upper and lower ends of the sealed container. A water inlet valve is installed at the water inlet interface. A second one-way valve for introducing gas into the mixing chamber is provided at the upper end of the partition, and a water supply interface communicating with a water supply pipe located in the mixing chamber is provided at the lower end of the partition; a mixed water and gas outlet is provided at the lower end of the mixing chamber;

[0009] When the water inlet valve is opened and the water spraying port of the water supply pipe sprays water, the pressure in the mixing chamber is less than the pressure in the gas chamber.

[0010] Furthermore, the movable sealing structure moves longitudinally between the lower one-way valve among the first one-way valve and the second one-way valve and the upper interface among the water inlet interface and the water supply interface.

[0011] Furthermore, the movable sealing structure is a flexible diaphragm sealed and fixed in the middle of the premixing chamber.

[0012] Furthermore, the movable sealing structure includes: a slider movably sealed and installed in the premixing chamber, an upper limit structure provided below the first one-way valve and the second one-way valve, and a lower limit structure provided above the water inlet interface and the water supply interface. The slider can slide along the inner wall of the premixing chamber between the upper limit structure and the lower limit structure.

[0013] Furthermore, the density of the slider is greater than the density of water.

[0014] Furthermore, the second one-way valve is provided with a flow limiting orifice.

[0015] Further, the gas-liquid mixing device further includes: an upper liquid level sensor and a lower liquid level sensor respectively installed at the upper and lower parts of the mixing chamber, an intake electromagnetic valve installed at the installation interface of the second one-way valve, and a control board; the control board is used to control the opening and closing of the intake electromagnetic valve according to the feedback of the upper liquid level sensor and the lower liquid level sensor; the intake electromagnetic valve is installed at the front end of the intake of the second one-way valve.

[0016] Further, a gas mixing tank is further arranged below the water spraying port in the mixing chamber, and the mixed water and gas outlet is arranged below the drain outlet of the gas mixing tank.

[0017] Further, the diameter of the water spraying port of the water supply pipe is smaller than the diameter of the water supply pipe.

[0018] When using the gas-liquid mixing device of the present invention, when the water inlet valve is opened and water enters the water chamber, after passing through the water supply interface and the water supply pipe, it is sprayed into the mixing chamber through the water spraying port. At this time, the pressure in the mixing chamber is less than the pressure in the gas chamber, and the gas chamber can continuously introduce air into the mixing chamber through the second one-way valve to achieve the purpose of water-gas mixing; when the water inlet valve is closed, the water and gas mixture flows out through the mixed water and gas outlet, which has a pressure relief effect on the mixing chamber. The water in the water chamber and the gas in the gas chamber respectively enter the mixing chamber through the water supply interface and the second one-way valve. When a negative pressure is generated in the gas chamber, air enters the gas chamber through the first one-way valve until the pressures in the pre-mixing chamber and the mixing chamber are the same as the external atmospheric pressure. During the opening and closing process of the water inlet valve, the movable sealing structure moves longitudinally along the pre-mixing chamber to achieve the pressure balance between the water chamber and the gas chamber. When the water inlet valve of the gas-liquid mixing device of the present invention is in the open and closed states, both water and gas can continuously mix in the mixing chamber, providing guarantee for the continuous production of micro-bubble water. Moreover, this device does not require an air pressurization device, has a simple structure, and reduces costs.

[0019] The present invention also provides a micro-bubble water preparation device, including: the above-mentioned gas-liquid mixing device, a bubble generator installed on the mixed water and gas outlet, and a micro-bubble water output pipe connected to the bubble generator.

[0020] The micro-bubble water preparation device of the present invention includes the gas-liquid mixing device of the present invention, and can achieve the technical effects that the gas-liquid mixing device can produce, and realizes the continuous supply of micro-bubble water with a relatively low cost of the device itself. Description of the Drawings

[0021] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a schematic structural diagram of a microbubble water machine in the prior art;

[0023] Figure 2 It is a schematic structural diagram of the microbubble water preparation device provided in the first embodiment of the present invention;

[0024] Figure 3 It is a schematic structural diagram of the microbubble water preparation device provided in the second embodiment of the present invention;

[0025] Figure 4 It is a schematic structural diagram of the microbubble water preparation device provided in the third embodiment of the present invention.

[0026] Icon: 1 - premixing chamber; 1-1 - gas chamber; 1-2 - water chamber; 1-2-1 - water inlet interface; 1-2-2 - water supply interface; 2 - mixing chamber; 2-1 - mixed water and gas outlet; 2-2 - gas mixing tank; 3 - partition board; 4 - movable sealing structure; 4-1 - slider; 4-2 - lower limit structure; 4-3 - upper limit structure; 5 - water inlet valve; 6 - first one-way valve; 7 - second one-way valve; 8 - water supply pipe; 8-1 - water spraying port; 9 - bubble generator; 10 - microbubble water output pipe; 11 - upper liquid level sensor; 12 - lower liquid level sensor; 13 - intake electromagnetic valve. Specific embodiments

[0027] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the scope of protection of the present invention.

[0028] In the description of the present invention, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0029] Refer to Figures 2 - 4 , this embodiment provides a gas-liquid mixing device for preparing microbubble water of the present invention, including a sealed container, which is divided by a partition board 3 into a laterally adjacent and sealed mixing chamber 2 and a premixing chamber 1; a movable sealing structure 4 is installed in the premixing chamber 1 for dividing the premixing chamber 1 into a water chamber 1-2 and a gas chamber 1-1, and the gas chamber 1-1 is located above the water chamber 1-2;

[0030] At the upper and lower ends of the closed container, a first one-way valve 6 for introducing gas into the gas chamber 1-1 and a water inlet interface 1-2-1 for introducing water into the water chamber 1-2 are respectively provided. A water inlet valve 5 is installed at the water inlet interface 1-2-1. At the upper end of the partition 3, a second one-way valve 7 for introducing gas into the mixing chamber 2 is provided. At the lower end of the partition 3, a water supply interface 1-2-2 communicating with a water supply pipe 8 located in the mixing chamber 2 is provided. The water spraying port 8-1 of the water supply pipe 8 is located in the upper part of the mixing chamber 2; at the lower end of the mixing chamber 2, a mixed water and gas outlet 2-1 is provided.

[0031] When the water inlet valve 5 is opened and the water spraying port 8-1 of the water supply pipe 8 sprays water, the pressure in the mixing chamber 2 is less than the pressure in the gas chamber 1-1.

[0032] When using the gas-liquid mixing device in this embodiment, when the water inlet valve 6 is opened and water enters the water chamber 1-1, after passing through the water supply interface 1-2-2 and the water supply pipe 8, it is sprayed into the mixing chamber 2 from the water spraying port 8-1. At this time, the pressure in the mixing chamber 2 is less than the pressure in the gas chamber 1-1, and the gas chamber 1-1 can continuously introduce air into the mixing chamber 2 through the second one-way valve 7 to achieve the purpose of water-gas mixing; when the water inlet valve 6 is closed, the water and gas mixture flows out through the mixed water and gas outlet 2-1, which has a pressure relief effect on the mixing chamber 2. The water in the water chamber 1-1 and the gas in the gas chamber 1-2 respectively enter the mixing chamber 2 through the water supply interface 1-2-2 and the second one-way valve 7. When a negative pressure is generated in the gas chamber 1-1, air enters the gas chamber 1-1 through the first one-way valve 6 until the pressures in the premixing chamber 1 and the mixing chamber 2 are the same as the external atmospheric pressure. During the opening and closing process of the water inlet valve 5, the movable sealing structure 4 moves longitudinally along the premixing chamber 1 to achieve the pressure balance between the water chamber 1-2 and the gas chamber 1-1. When the water inlet valve 5 of this gas-liquid mixing device is in the open and closed states, water and gas can continuously mix in the mixing chamber 2, providing guarantee for the continuous production of microbubble water. Moreover, this device does not need to use an air pressurizing device, has a simple structure, and reduces costs.

[0033] It should be noted that the water inlet valve 5 in this embodiment is connected to the tap water pipeline to facilitate the supply of water to the gas-liquid mixing device.

[0034] In this embodiment, the movable sealing structure 4 moves longitudinally between the lower one-way valve among the first one-way valve 6 and the second one-way valve 7 and the upper interface among the water inlet interface 1-2-1 and the water supply interface 1-2-2; among them, the relative heights of the first one-way valve 6 and the second one-way valve 7 are not limited, and the relative heights of the water inlet interface 1-2-1 and the water supply interface 1-2-2 are not limited either.

[0035] This embodiment also provides a microbubble water preparation device of the present invention, including: the above-mentioned gas-liquid mixing device, a bubble generator 9 installed on the mixed water and gas outlet 2-1, and a microbubble water output pipe 10 connected to the bubble generator 9.

[0036] The microbubble water preparation device of the present embodiment includes the above-mentioned gas-liquid mixing device, and can achieve the technical effects that the gas-liquid mixing device can produce, and realize the continuous supply of microbubble water with a relatively low cost of the device itself.

[0037] In order to more clearly elaborate on the gas-liquid mixing device in the present invention, the following will refer to the accompanying drawings and combine with embodiments for detailed description. Without conflict, the embodiments in this application and the features in the embodiments can be combined with each other.

[0038] Embodiment 1

[0039] See Figure 2 , in the gas-liquid mixing device of this embodiment, the movable sealing structure 4 is a flexible diaphragm sealed and fixed in the middle of the premixing chamber 1-1.

[0040] During the use of the gas-liquid mixing device in this embodiment, the flexible diaphragm continuously deforms to balance the pressures in the gas chamber 1-1 and the water chamber 1-2. Since the diaphragm is light in weight and its gravity can be ignored, therefore, the pressure P 水 in the water chamber 1-2 is equal to the pressure P 气 in the gas chamber 1-1. When the water inlet valve 5 is opened, as long as the water pressure passing through the water spraying port 8-1 becomes lower, that is, the pressure P 混 in the mixing chamber <P 气 =P 水 , so that air can enter the mixing chamber 2 through the second one-way valve 7 to achieve the purpose of water-gas mixing.

[0041] In this embodiment, in order to make the water pressure lower after passing through the water spraying port 8-1, the diameter of the water spraying port 8-1 of the water supply pipe 8 is set to be smaller than the diameter of the water supply pipe 8, so as to achieve that the pressure P 混 in the mixing chamber 2 is less than the pressure P 气 in the gas chamber 1-1.

[0042] In other embodiments, the diameter of the water supply pipe 8 can also be set to be smaller than the diameter of the water supply interface 1-2-2, or a longer water supply pipe 8 can be set, or a larger height difference can be set between the water spraying port 8-1 and the water supply interface 1-2-2. Of course, two or more of the above features and the feature that the diameter of the water spraying port 8-1 in this embodiment is smaller than the diameter of the water supply pipe 8 can be selected to achieve that the pressure P 混 in the mixing chamber 2 is less than the pressure P 气 in the gas chamber 1-1.

[0043] Specifically, after the water inlet valve 5 in this embodiment is opened, the water pressure decreases by ∆P after passing through the water spraying port 8-1. Therefore, the pressure P 混 in the mixing chamber 2 = P 水 -∆P. Since P 混 =P 水, the pressure P of the air chamber 1-1 气 is greater than the pressure P of the mixing chamber 2 混 , and the air chamber 1-1 can continuously supply air into the mixing chamber 2.

[0044] In order to control the air flow rate entering the mixing chamber 2 through the second one-way valve 7, a flow-limiting orifice is provided in the second one-way valve 7.

[0045] In this embodiment, a mixing gas groove 2-2 is further provided below the water spray port 8-1 in the mixing chamber 2, and the mixed water and gas outlet 2-1 is provided below the drain port of the mixing gas groove 2-2.

[0046] Preferably, the mixed water and gas outlet 2-1 is provided directly below the drain port of the mixing gas groove 2-2, so that the water and gas mixture passing through the drain port of the mixing gas groove 2-2 can smoothly flow into the bubble generator 9 through the mixed water and gas outlet 2-1.

[0047] Embodiment Two

[0048] See Figure 3 , in the gas-liquid mixing device of this embodiment, the movable sealing structure 4 includes: a slider 4-1 that is movably sealed and installed in the premixing chamber, an upper limit structure 4-3 provided below the first one-way valve 6 and the second one-way valve 7, and a lower limit structure 4-2 provided above the water inlet interface 1-2-1 and the water supply interface 1-2-2. The slider 4-1 can slide along the inner wall of the premixing chamber 1 between the upper limit structure 4-3 and the lower limit structure 4-2.

[0049] It should be noted that the movable sealing structure 4 further includes: sealing members such as a sealing rubber ring provided in contact with the inner wall of the slider 4-1 and the premixing chamber 1.

[0050] During the use of the gas-liquid mixing device in this embodiment, the slider 4-1 continuously slides up and down along the inner wall of the premixing chamber 1 to balance the pressures of the air chamber 1-1 and the water chamber 1-2. At this time, the pressure P of the water chamber 1-2 水 , the pressure P of the air chamber 1-1 气 and the gravity G of the slider 滑 The relationship is P 气 +G 滑 =P 水 , when the water inlet valve 5 is opened, as long as the water pressure passing through the water spray port 8-1 becomes lower than the pressure P of the mixing chamber 混 <P 气 , so that air can enter the mixing chamber 2 through the second one-way valve 7 to achieve the purpose of water and gas mixing.

[0051] In this embodiment, in order to reduce the water pressure after passing through the water spray port 8-1, the diameter of the water spray port 8-1 of the water supply pipe 8 is set to be smaller than the diameter of the water supply pipe 8, so that the pressure P of the mixing chamber 2 混 is less than the pressure P of the air chamber 1-1气 Purpose.

[0052] In other embodiments, the diameter of the water supply pipe 8 may also be set to be smaller than the diameter of the water supply interface 1-2-2, or a longer water supply pipe 8 may be provided, or a large height difference may be provided between the water spray nozzle 8-1 and the water supply interface 1-2-2. Of course, the characteristics described above and the characteristic that the diameter of the water spray nozzle 8-1 in this embodiment is smaller than the diameter of the water supply pipe 8 may also be combined, and two or more of the setting methods may be selected to achieve the pressure P of the mixing chamber 2 混 less than the pressure P of the air chamber 1-1 气 .

[0053] Specifically, after the water inlet valve 5 in this embodiment is opened, the pressure of the water passing through the water spray nozzle 8-1 decreases by ∆P. Therefore, the pressure P of the mixing chamber 2 混 = P 水 - ∆P. Since P 气 + G 滑 = P 水 , to make the pressure P of the air chamber 1-1 气 greater than the pressure P of the mixing chamber 2 混 , then P 水 - G 滑 > P 水 - ∆P. Therefore, ∆P > G 滑 , to ensure that the air chamber 1-1 can continuously introduce air into the mixing chamber 2.

[0054] To prevent the buoyancy of water from having a greater impact on the pressure balance between the water chamber 1-2 and the air chamber 1-1, the density of the slider 4-1 is greater than the density of water.

[0055] To make the air flow rate entering the mixing chamber 2 through the second one-way valve 7 controllable, the second one-way valve 7 is provided with a flow limiting hole.

[0056] In this embodiment, a gas mixing groove 2-2 is further provided below the water spray nozzle 8-1 in the mixing chamber 2, and the mixed water and gas outlet 2-1 is provided below the drain outlet of the gas mixing groove 2-2.

[0057] Preferably, the mixed water and gas outlet 2-1 is provided directly below the drain outlet of the gas mixing groove 2-2, so that the water and gas mixture passing through the drain outlet of the gas mixing groove 2-2 can smoothly flow into the bubble generator 9 through the mixed water and gas outlet 2-1.

[0058] Embodiment III

[0059] See Figure 4, the gas-liquid mixing device of this embodiment is an improvement based on the first embodiment. The gas-liquid mixing device of this embodiment further includes: an upper liquid level sensor 11 and a lower liquid level sensor 12 respectively installed in the upper and lower parts of the mixing chamber 2, an intake electromagnetic valve 13 installed at the installation interface of the second one-way valve 7, and a control board; the control board is used to control the opening and closing of the intake electromagnetic valve 13 according to the feedback of the upper liquid level sensor 11 and the lower liquid level sensor 12.

[0060] Specifically, when the control board receives the feedback signal sent by the upper liquid level sensor 11, it indicates that the liquid level in the mixing chamber 2 is relatively high at this time. The control board controls the intake electromagnetic valve 13 to open, and the air chamber 1-1 supplies air to the mixing chamber 2; when the control board receives the feedback signal sent by the lower liquid level sensor 12, it indicates that the liquid level in the mixing chamber 2 is relatively low at this time. The control board controls the intake electromagnetic valve 13 to close, and at this time, the air chamber 1-1 stops supplying air to the mixing chamber 2.

[0061] By setting the upper liquid level sensor 11, the lower liquid level sensor 12, the intake electromagnetic valve 13 and the control board in the gas-liquid mixing device, its dynamic control is realized, ensuring the mixing of water and gas, and improving the operation reliability of the device.

[0062] Due to the setting of the above components, the dynamic control of the intake air in the mixing chamber 2 is realized. Therefore, the second one-way valve 7 can be set without a flow limiting hole.

[0063] In the gas-liquid mixing device of this embodiment, the intake electromagnetic valve 13 is installed at the front end of the intake of the second one-way valve 7. That is to say, the air passes through the intake electromagnetic valve 13 before passing through the second one-way valve 7. After the intake electromagnetic valve 13 is opened, the air triggers the second one-way valve 7 to act; after the intake electromagnetic valve 13 is closed, the second one-way valve 7 does not act. Therefore, the action times of the second one-way valve 7 are reduced, and the service life of the second one-way valve 7 is improved.

[0064] It should be noted that in another embodiment, the second embodiment can also be improved based on the features in this embodiment, that is, the upper liquid level sensor 11 and the lower liquid level sensor 12 are installed in the upper and lower parts of the mixing chamber 2 of the gas-liquid mixing device in the second embodiment, the intake electromagnetic valve 13 is installed at the installation interface of the second one-way valve 7, and the opening and closing of the intake electromagnetic valve 13 are controlled by the control board to realize the dynamic control of the intake air in the mixing chamber 2.

[0065] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An air-liquid mixing device for preparing microbubble water, comprising a sealed container, characterized in that, The closed container is separated by a partition plate (3) into a laterally adjacent and sealed mixing chamber (2) and a premixing chamber (1); a movable sealing structure (4) is installed in the premixing chamber (1) for separating the premixing chamber (1) into a water chamber (1-2) and a gas chamber (1-1), and the gas chamber (1-1) is located above the water chamber (1-2). A first one-way valve (6) for admitting gas into the gas chamber (1-1) and a water inlet interface (1-2-1) for admitting water into the water chamber (1-2) are respectively arranged at the upper and lower ends of the closed container, and a water inlet valve (5) is installed at the water inlet interface (1-2-1). A second one-way valve (7) for admitting gas into the mixing chamber (2) is arranged at the upper end of the partition plate (3), and a water supply interface (1-2-2) communicated with a water supply pipe (8) located in the mixing chamber (2) is arranged at the lower end of the partition plate (3); a mixed water and gas outlet (2-1) is arranged at the lower end of the mixing chamber (2). The movable sealing structure (4) slides along the premixing chamber for instantaneously changing the volumes of the gas chamber (1-1) and the water chamber (1-2); when the water inlet valve (5) is opened and the water spraying port (8-1) of the water supply pipe (8) sprays water, the pressure in the mixing chamber (2) is less than the pressure in the gas chamber (1-1).

2. The gas-liquid mixing device according to claim 1, wherein The movable sealing structure (4) moves longitudinally between the lower one-way valve among the first one-way valve (6) and the second one-way valve (7) and the upper interface among the water inlet interface (1-2-1) and the water supply interface (1-2-2).

3. The gas-liquid mixing device according to claim 1, characterized in that, The movable sealing structure (4) is a flexible diaphragm sealed and fixed in the middle of the premixing chamber (1).

4. The gas-liquid mixing device according to claim 1, characterized in that, The movable sealing structure (4) includes: a slider (4-1) movably and sealingly installed in the premixing chamber, an upper limit structure (4-3) arranged below the first one-way valve (6) and the second one-way valve (7), and a lower limit structure (4-2) arranged above the water inlet interface (1-2-1) and the water supply interface (1-2-2), and the slider (4-1) can slide along the inner wall of the premixing chamber (1) between the upper limit structure (4-3) and the lower limit structure (4-2).

5. The gas-liquid mixing device according to claim 4, characterized in that, The density of the slider (4-1) is greater than the density of water.

6. The gas-liquid mixing device according to any one of claims 3-5, characterized in that, The second one-way valve (7) is provided with a flow limiting hole.

7. The gas-liquid mixing device according to any one of claims 3-5, characterized in that, Further included is: An upper liquid level sensor (11) and a lower liquid level sensor (12) respectively installed in the upper and lower parts of the mixing chamber (2), an intake electromagnetic valve (13) installed at the installation interface of the second one-way valve (7), and a control board; the control board is used for controlling the opening and closing of the intake electromagnetic valve (13) according to the feedback of the upper liquid level sensor (11) and the lower liquid level sensor (12); the intake electromagnetic valve (13) is installed at the intake front end of the second one-way valve (7).

8. The gas-liquid mixing device according to claim 1, characterized in that, A gas mixing groove (2-2) is further arranged below the water spraying port (8-1) in the mixing chamber (2), and the mixed water and gas outlet (2-1) is arranged below the drain outlet of the gas mixing groove (2-2).

9. The gas-liquid mixing device according to claim 1, wherein, The diameter of the water spraying port (8-1) of the water supply pipe (8) is smaller than the diameter of the water supply pipe (8).

10. A micro-bubble water preparation device, characterized in that, Including: The gas-liquid mixing device according to any one of claims 1-9, a bubble generator (9) installed on the mixed water and gas outlet (2-1), and a microbubble water output pipe (10) connected to the bubble generator (9).

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