Gas-water mixing device and water purifying device

Abstract

The invention provides an air-water mixing device and a water purifying device, the air-water mixing device comprises a shell and an aerator, the shell is provided with a water inlet end, a containing cavity, a water outlet end and an air inlet pipe, the containing cavity is arranged between the water inlet end and the water outlet end, the first end of the air inlet pipe is arranged on the outer side of the shell, and the second end of the air inlet pipe extends into the containing cavity; the aerator is arranged in the containing cavity, the air inlet pipe is communicated with the aerator, an air-water mixing channel is arranged on the inner side and / or the outer side of the aerator, and the air-water mixing channel is communicated with the water inlet end and the water outlet end respectively; the water purifying device comprises a filtering device, an ozone supply device and the gas-water mixing device, the gas-water mixing device is connected to the water inlet end of the filtering device, and the gas outlet end of the ozone supply device is communicated with the gas inlet pipe of the gas-water mixing device; the mixer is small in size, convenient to install and good in mixing effect.

Description

Technical Field

[0001] The invention relates to the technical field of water purification, and in particular to a gas-water mixing device and a water purification device. Background Art

[0002] In recent years, as the public's attention to drinking water safety has increased, ozone, as a highly effective and broad-spectrum disinfectant, has been widely used in water purification devices. Ozone can quickly inactivate bacteria, viruses and other microorganisms in water through its strong oxidizing properties, and only produces oxygen after decomposition, without chemical residual pollution. It is regarded as an ideal alternative to traditional chlorine disinfection.

[0003] The disinfection efficiency of ozone in practical applications is highly dependent on its mixing efficiency with water. However, current ozone mixing technologies generally have disadvantages such as large size, poor mixing effect and inconvenient installation. Summary of the invention

[0004] The first object of the present invention is to provide a gas-water mixing device which is small in size, easy to install and has a good mixing effect.

[0005] The second object of the present invention is to provide a water purification device comprising the above-mentioned gas-water mixing device.

[0006] In order to achieve the above-mentioned first purpose, the present invention provides an air-water mixing device, including a shell and an aerator, the shell is provided with a water inlet end, a accommodating chamber, a water outlet end and an air inlet pipe, the accommodating chamber is arranged between the water inlet end and the water outlet end, the first end of the air inlet pipe is arranged on the outside of the shell, and the second end of the air inlet pipe extends into the accommodating chamber; the aerator is arranged in the accommodating chamber, the air inlet pipe is connected with the aerator, and an air-water mixing channel is arranged on the inner side and / or the outer side of the aerator, and the air-water mixing channel is respectively connected with the water inlet end and the water outlet end.

[0007] It can be seen from the above scheme that through the above arrangement, the gas is first introduced into the aerator, and the numerous tiny pores on the aerator are used to disperse the gas into a large number of tiny bubbles, which facilitates the bubbles to diffuse quickly and evenly into the water, which is beneficial to increase the contact area between water and gas, and is beneficial to the rapid dissolution of gas into water, ensuring uniform mixing of gas and water and improving the mixing effect; the present invention also has the advantages of simple structure, small size, low noise, etc.; the present invention can also be applied to water purification devices and other devices that require gas-water mixing.

[0008] A further solution is that the outer peripheral wall of the aerator is adjacent to the cavity wall of the accommodating cavity, and a first air-water mixing channel is provided inside the aerator.

[0009] It can be seen from the above scheme that through the above arrangement, the water flows through the inside of the aerator, which facilitates the uniform mixing of the water flow and the bubbles; in addition, a first air-water mixing channel is arranged inside the aerator to avoid the water flow directly impacting the aerator, which is beneficial to extending the service life of the aerator.

[0010] A further solution is that the aerator is arranged in the middle of the accommodating cavity, and a second air-water mixing channel is formed between the outer peripheral wall of the aerator and the cavity wall of the accommodating cavity.

[0011] It can be seen from the above scheme that, through the above arrangement, the water flows through the outside of the aerator, which facilitates the uniform mixing of the water flow and the bubbles.

[0012] A further solution is that the aerator is arranged in the middle of the accommodating cavity, a third air-water mixing channel is formed between the outer peripheral wall of the aerator and the cavity wall of the accommodating cavity, and a fourth air-water mixing channel is arranged inside the aerator.

[0013] It can be seen from the above scheme that, through the above arrangement, part of the water flow passes through the inside of the aerator, and the other part passes through the outside of the aerator. This embodiment also provides a third gas-water mixing channel and a fourth gas-water mixing channel, which is beneficial to further increase the contact area between the aerator and the water flow, further improve the gas dissolution rate, and thus increase the concentration of gas dissolved in water.

[0014] A further solution is that a nozzle is provided between the water inlet and the aerator of the shell, the inner diameter of the nozzle gradually decreases from one end close to the water inlet to the other end, and the two ends of the nozzle are respectively connected to the water inlet and the air-water mixing channel.

[0015] It can be seen from the above scheme that through the above setting, from the Venturi effect and Bernoulli's law, as the inner diameter of the nozzle gradually decreases, the water flow velocity gradually increases, the water pressure gradually decreases, and the tiny pores on the surface of the aerator are in low pressure, which facilitates the supply of gas and helps to reduce the pressure required to supply gas into the aerator.

[0016] A further solution is that a spiral portion is provided in the air-water mixing channel, the spiral portion is provided with a spiral channel, and the spiral channel is communicated with the air-water mixing channel.

[0017] It can be seen from the above scheme that, through the above setting, the spiral channel can, on the one hand, increase the distance of water flow, thereby prolonging the time for water to flow in the air-water mixing channel, and buying more time for the bubbles to dissolve into the water; on the other hand, the spiral channel can change the flow direction of the water multiple times, play a stirring role, which is conducive to further uniform mixing of bubbles and water.

[0018] A further solution is that a detachable connection structure is provided on the water inlet end and / or the water outlet end of the shell, and the detachable connection structure includes a threaded connection structure or a snap-on connection structure.

[0019] It can be seen from the above scheme that, through the above arrangement, the gas-water mixing device of the present invention can be quickly connected to a water purification device or other devices requiring gas-water mixing, thereby facilitating installation and disassembly.

[0020] A further solution is that the accommodating chamber includes a straight section and an expansion section which are interconnected, the straight section is arranged near the water inlet end, the expansion section is arranged near the water outlet end, and the aerator is at least partially arranged in the straight section. It can be seen from the above scheme that, through the above arrangement, the arrangement of the straight section can facilitate the rapid mixing of bubbles and water, and the arrangement of the expansion section can reserve sufficient space for the arrangement of the air intake pipe.

[0021] A further solution is that the air inlet pipe is directly connected to the air inlet end of the aerator, or the air inlet pipe is connected to the air inlet end of the aerator through a hose.

[0022] In order to achieve the above-mentioned second purpose, the present invention provides a water purification device, including a filtering device, an ozone supply device and the above-mentioned gas-water mixing device, the gas-water mixing device is connected to the water inlet pipe of the filtering device, and the air outlet end of the ozone supply device is connected to the air inlet pipe of the gas-water mixing device.

[0023] It can be seen from the above scheme that through the above arrangement, ozone gas is introduced into the aerator through the ozone supply device, and the aerator evenly distributes the ozone gas into the water in the form of tiny bubbles, thereby increasing the contact area between water and ozone gas, thereby quickly dissolving the ozone gas into the water to increase the concentration of the gas dissolved in water, thereby playing a role in disinfection and sterilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural diagram of the first embodiment of the gas-water mixing device of the present invention.

[0025] Figure 2 It is an exploded view of the first embodiment of the gas-water mixing device of the present invention.

[0026] Figure 3 It is a cross-sectional view of the first embodiment of the gas-water mixing device of the present invention.

[0027] Figure 4 It is a structural diagram of the second embodiment of the gas-water mixing device of the present invention.

[0028] Figure 5 It is an exploded view of the second embodiment of the gas-water mixing device of the present invention.

[0029] Figure 6 It is a cross-sectional view of the second embodiment of the gas-water mixing device of the present invention.

[0030] Figure 7 It is a structural diagram of the third embodiment of the gas-water mixing device of the present invention.

[0031] Figure 8 It is an exploded view of the third embodiment of the gas-water mixing device of the present invention.

[0032] Fig. 9It is a cross-sectional view of the third embodiment of the gas-water mixing device of the present invention.

[0033] Fig.10 It is a structural diagram of the water purification device of the present invention.

[0034] Fig.11 It is a cross-sectional view of the water purification device of the present invention.

[0035] The present invention is further described below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0036] The first embodiment of the gas-water mixing device: See also Figures 1 to 3 The gas-water mixing device 10a provided in this embodiment includes a shell 1 and an aerator 2a.

[0037] The shell 1 is provided with a water inlet end 111, a accommodating chamber 13, a water outlet end 121 and an air inlet pipe 122. The accommodating chamber 13 is arranged between the water inlet end 111 and the water outlet end 121. The first end of the air inlet pipe 122 is arranged outside the shell 1, and the second end of the air inlet pipe 122 extends into the accommodating chamber 13.

[0038] The aerator 2a is arranged in the accommodating chamber 13, and the air inlet pipe 122 is connected to the air inlet end 25a of the aerator 2a, and is used to supply gas into the aerator 2a. An air-water mixing channel is arranged on the inner side and / or the outer side of the aerator 2a, and the air-water mixing channel is respectively connected to the water inlet end 111 and the water outlet end 121. The aerator 2a is a device that can generate a large number of bubbles. The surface of the aerator 2a is provided with many tiny pores, and the gas can pass through the tiny pores and enter the air-water mixing channel, so as to be evenly mixed with the water in the air-water mixing channel. The aerator 2a of this embodiment is preferably an aeration stone.

[0039] In this embodiment, the aerator 2a is set to a hollow annular structure, the outer peripheral wall of the aerator 2a is adjacent to the cavity wall of the accommodating cavity 13, and the inner side of the aerator 2a is provided with a first gas-water mixing channel 21, and the first gas-water mixing channel 21 runs through the axial ends of the aerator 2a. The water flow entering from the water inlet end 111 can pass through the first gas-water mixing channel 21, and the gas in the aerator 2a can be emitted from the inner wall of the aerator 2a to the first gas-water mixing channel 21. The gas diffuses into the water and forms a large number of tiny bubbles. These bubbles move in the water, increase the contact area between water and gas, and accelerate the dissolution rate of the gas, thereby improving the gas-water mixing effect. Compared with the solution of directly supplying gas into water through an air pipe in the prior art, this embodiment can improve the speed and uniformity of gas-water mixing, and can effectively increase the concentration of gas dissolved in water.

[0040] The housing 1 comprises a first housing 11a and a second housing 12a which are connected to each other. The water inlet 111 and most of the accommodating cavity 13 are arranged in the first housing 11a, and the water outlet 121 and a small part of the accommodating cavity 13 are arranged in the second housing 12a.

[0041] The first shell 11a is provided with a water inlet end 111, a straight pipe section and a first extension section in sequence along the water flow direction. The water inlet end 111 can be connected to a tap water pipe. The outer diameter of the straight pipe section is almost equal to or slightly different from the outer diameter of the water inlet end 111. The straight pipe section can be set to a preset length. The longer the length of the straight pipe section, the better the gas-water mixing effect. The outer diameter of the first extension section expands outward from the end of the straight pipe section.

[0042] The second shell 12a is provided with a second expansion section and a water outlet 121 in sequence along the water flow direction thereof. The second expansion section matches and is sealedly connected to the first expansion section. The outer diameter of the second expansion section gradually decreases from one end close to the first expansion section to the water outlet 121. The outer diameter of the water outlet 121 is smaller than the outer diameter of the water inlet 111, or the outer diameter of the water outlet 121 is equal to the outer diameter of the water inlet 111, or the outer diameter of the water outlet 121 is slightly larger than the outer diameter of the water inlet 111, and the specific specification is subject to the pipe orifice connected to the water outlet 121. The gas-water mixing device of this embodiment can be directly connected to a tap water pipe, and has the advantages of simple structure, small size, convenient installation and good practicality.

[0043] The accommodating chamber 13 includes a straight section 131 and an expansion section 132 which are connected to each other. The straight section 131 is arranged in the first shell 11a and is arranged near the water inlet end 111, and the expansion section 132 is arranged between the straight section 131 and the water outlet end 121 and is arranged near the water outlet end 121. The expansion section 132 is arranged on the inner side of the first expansion section and the second expansion section. The aerator 2a is arranged in the straight section 131, and the air inlet end 25a of the aerator 2a extends to the expansion section 132. The second end of the air inlet pipe 122 extends into the expansion section 132 and is connected to the air inlet end 25a. The housing 1 is provided with a nozzle 123 between the water inlet end 111 and the aerator 2a, and the nozzle 123 is arranged in the straight section of the accommodating chamber 13. The inner diameter of the nozzle 123 gradually decreases from one end close to the water inlet end 111 to the other end, and the end with the smaller inner diameter of the nozzle 123 is correspondingly connected to the first end of the first air-water mixing channel 21 of the aerator 2a, which can achieve air-water mixing and reduce the impact of water flow on the aerator 2a, thereby extending the service life of the aerator 2a.

[0044] The inner diameter of the first gas-water mixing channel 21 is equal to or slightly larger than the inner diameter of the narrowest part of the nozzle 123 , and the inner diameter of the first gas-water mixing channel 21 is smaller than the inner diameter of the middle and widest part of the nozzle 123 .

[0045] It can be known from the Venturi effect and Bernoulli's law that when the water flows through the gradually shrinking nozzle 123, its flow rate increases and the pressure decreases. When the fluid flows through the narrowest part of the nozzle 123 and the first air-water mixing channel 21, the flow rate reaches a larger value due to the reduction in cross-sectional area, and the static pressure drops to the minimum. At this time, an adsorption effect can be generated at the narrowest part of the nozzle 123 and in the first air-water mixing channel 21, which facilitates the discharge of gas from the aerator 2a, and can effectively reduce the air pressure required to supply air to the aerator 2a, so that even if a low-power air pump is used, gas can be supplied to the aerator 2a, which is conducive to saving production costs.

[0046] In this embodiment, the housing 1 is provided with a detachable connection structure on the water inlet end 111 and / or the water outlet end 121, so as to facilitate connection with the water inlet pipe of a water purification device or other device requiring gas-water mixing. The detachable connection structure includes a threaded connection structure or a snap-on connection structure. In this embodiment, preferably, an external threaded connection structure is provided on the outside of the water inlet end 111 and the water outlet end 121. The external threaded connection structure at the water inlet end 111 can be connected with a water pipe. The diameters of the external threaded connection structure at the water inlet end 111 and the external threaded connection structure at the water outlet end 121 can be equal or unequal, which will not be described in detail.

[0047] In this embodiment, a support column 124a is provided on the inner side of the second shell 12a, and the support column 124a extends along the axial direction of the second shell 12a, that is, parallel to the direction of the water flow; the aerator 2a is connected to the support column 124b, and one end of the air inlet pipe 122 extends into the accommodating chamber 13 and is connected to the air inlet end 25a of the aerator 2a.

[0048] Second embodiment of the gas-water mixing device: See also Figures 4 to 6 On the basis of the first embodiment of the gas-water mixing device, the aerator 2b of this embodiment is arranged in the middle of the accommodating chamber 13, and an annular second gas-water mixing channel 22 is formed between the outer peripheral wall of the aerator 2b and the cavity wall of the accommodating chamber 13. The gas in the aerator 2c can be emitted to the second gas-water mixing channel 22, and the second gas-water mixing channel 22 is connected to the nozzle 123 and the water outlet 121.

[0049] Since the water flow sprayed from the nozzle 123 can impact the aerator 2b, in order to prevent the aerator 2b from being displaced under the action of the impact force, a support structure is provided on the inner side of the second shell 12b in this embodiment, and the support structure extends into the first shell 11b. The support structure includes a mounting ring 112 and a plurality of support arms 113, the mounting ring 112 is fixedly connected to the same end of the plurality of support arms 113, and the plurality of support arms 113 are arranged along the circumference of the mounting ring 112. The support arms 113, the mounting ring 112 and the second shell 12b are integrally formed. One end of the aerator 2b is arranged in the mounting ring 112, and the other end of the aerator 2b extends into the straight section 131. The air inlet end 25b of the aerator 2b passes through the mounting ring 112, and the air inlet pipe 122 is connected to the air inlet end 25b of the aerator 2b through a hose.

[0050] The narrower end of the nozzle 123 of this embodiment extends into the straight section 131 and is disposed corresponding to the end of the aerator 2b. When the water flow hits the end of the aerator 2b, it can diverge around it so that the water flow can enter the second air-water mixing channel 22.

[0051] In order to extend the distance and time of water flow through the second gas-water mixing channel 22, a spiral portion (not shown in the figure) can be provided in the second gas-water mixing channel 22, and the spiral portion spirally extends along the inner wall of the straight section 131, so that a spiral channel is provided in the spiral portion, and water flow and bubbles can flow along the spiral channel. The spiral channel can also change the direction of the water flow multiple times, play a certain stirring role, and is conducive to further improving the degree of gas-water mixing.

[0052] The third embodiment of the gas-water mixing device: See also Figures 7 to 9 On the basis of the first embodiment of the gas-water mixing device, the aerator 2c of this embodiment is arranged in the middle of the accommodating chamber 13, and a third annular gas-water mixing channel 23 is formed between the outer peripheral wall of the aerator 2c and the cavity wall of the accommodating chamber 13, and a fourth gas-water mixing channel 24 is arranged inside the aerator 2c, and the fourth gas-water mixing channel 24 runs through both axial ends of the aerator 2c, and the gas in the aerator 2c can be simultaneously emitted to the third gas-water mixing channel 23 and the fourth gas-water mixing channel 24. The third gas-water mixing channel 23 and the fourth gas-water mixing channel 24 are both connected to the nozzle 123 and the water outlet 121.

[0053] When water is passed, a part of the water flows through the third gas-water mixing channel 23 and mixes with the gas in the third gas-water mixing channel 23, and another part of the water flows through the fourth gas-water mixing channel 24 and mixes with the gas in the fourth gas-water mixing channel 24. The water flows of this embodiment pass through two gas-water mixing channels at the same time, which is beneficial to further increase the contact area between gas and water, and further increase the gas-water mixing speed and the speed of gas dissolving in water.

[0054] The inner diameter of the third gas-water mixing channel 23 is equal to or slightly larger than the inner diameter of the narrowest part of the nozzle 123 , and the inner diameter of the third gas-water mixing channel 23 is smaller than the inner diameter of the middle and widest part of the nozzle 123 .

[0055] In the water flow direction, a preset distance L is provided between the end of the nozzle 123 and the end of the aerator 2 c , which reserves enough space for the water to flow through the end of the aerator 2 c and enter the fourth air-water mixing channel 24 .

[0056] It can be known from the Venturi effect and Bernoulli's law that when the water flows through the gradually shrinking nozzle 123, its flow rate increases and the pressure decreases. When the fluid flows through the narrowest part of the nozzle 123 and the third air-water mixing channel 23, the flow rate reaches a larger value due to the reduction in cross-sectional area, and the static pressure is relatively low. At this time, adsorption can be generated in the narrowest part of the nozzle 123 and the third air-water mixing channel 23, which is conducive to the discharge of gas from the aerator 2c, so as to reduce the air pressure required for supplying gas to the aerator 2c, and it is convenient to use a low-power air pump to supply gas into the aerator 2c, saving production costs.

[0057] In order to extend the distance and time of water flow through the fourth gas-water mixing channel 24, a spiral portion (not shown in the figure) can be provided in the fourth gas-water mixing channel 24, and the spiral portion spirally extends along the inner wall of the straight section 131, so that a spiral channel is formed in the spiral portion, and the water flow and bubbles can flow along the spiral channel. The spiral channel can also change the direction of the water flow multiple times, play a certain stirring role, and is conducive to further improving the degree of gas-water mixing.

[0058] In this embodiment, a plurality of support columns 124b are provided on the inner side of the second shell 12c. The support columns 124b are provided on the outer side of the third air-water mixing channel 23. The support columns 124b extend along the axial direction of the second shell 12c, that is, parallel to the water flow direction. The aerator 2c is connected to the support columns 124b, and one end of the air inlet pipe 122 extends into the accommodating chamber 13 and is connected to the air inlet end 25c of the aerator 2c.

[0059] Water purification device 20 embodiment: See also Figure 10 to Figure 11 This embodiment provides a water purification device 20, including a filtering device 201, an ozone supply device (not shown in the figure) and an air-water mixing device 10a / 10b / 10c of any of the above embodiments.

[0060] The filter device 201 includes a tank body 2011 and a filter element 2012 disposed in the tank body 2011. A three-way valve 2013 is disposed on the upper portion of the tank body 2011. The three-way valve 2013 includes a water inlet, a water outlet and a sewage outlet. The gas-water mixing device 10a is connected to the water inlet pipe of the filter device 201, that is, connected to the water inlet of the three-way valve 2013. The ozone supply device includes an ozone generator and an air pump. The gas outlet end of the ozone generator is connected to the gas inlet pipe 122 of the gas-water mixing device 10a / 10b / 10c. The air pump can supply the ozone gas generated by the ozone generator into the aerator 2a / 2b / 2c in the gas-water mixing device 10a / 10b / 10c with a relatively small pressure.

[0061] The water purification device 20 of this embodiment dissolves ozone gas into water to disinfect and sterilize. Thereafter, the disinfected and sterilized water and excess ozone bubbles enter the tank 2011 and are filtered by the filter element 2012 before being discharged from the water outlet.

[0062] Since the gas-water mixing device 10a / 10b / 10c is arranged at the water inlet end of the filtering device 201, during the filtering process, the ozone bubbles that have not yet dissolved in the water can continue to dissolve, which can not only improve the disinfection and sterilization effects, but also reduce or avoid the discharge of excess ozone gas from the water outlet with the water flow, which is beneficial to increasing the utilization rate of the ozone gas.

[0063] The water purification device 20 can also be connected in series with multiple filtering devices 201 at the same time. The disinfected and sterilized water and excess ozone bubbles are filtered through the multiple filtering devices 201 one by one to improve the cleanliness of the water and reduce the emission of excess ozone gas.

[0064] In summary, it can be seen that, through the above arrangement, the gas of the present invention is first introduced into the aerator, and the numerous tiny pores on the aerator are used to disperse the gas into a large number of tiny bubbles, so that the bubbles can be quickly and evenly diffused into the water, which is beneficial to increase the contact area between water and gas, and is beneficial to the rapid dissolution of gas into water, thereby ensuring uniform mixing of gas and water and improving the mixing effect. The present invention also has the advantages of simple structure, small size, low noise, etc. The present invention can also be applied to water purification devices and other devices that require gas-water mixing.

[0065] Finally, it should be emphasized that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A gas-water mixing device, characterized in that: include: A shell, wherein the shell is provided with a water inlet end, a containing cavity, a water outlet end and an air inlet pipe, the containing cavity is provided between the water inlet end and the water outlet end, a first end of the air inlet pipe is provided outside the shell, and a second end of the air inlet pipe extends into the containing cavity; An aerator is arranged in the accommodating cavity, the air inlet pipe is connected to the aerator, an air-water mixing channel is arranged on the inner side and / or the outer side of the aerator, and the air-water mixing channel is respectively connected to the water inlet end and the water outlet end.

2. The gas-water mixing device according to claim 1, characterized in that: The outer peripheral wall of the aerator is adjacent to the cavity wall of the accommodating cavity, and a first air-water mixing channel is arranged inside the aerator.

3. The gas-water mixing device according to claim 1, characterized in that: The aerator is arranged in the middle of the accommodating cavity, and a second air-water mixing channel is formed between the outer peripheral wall of the aerator and the cavity wall of the accommodating cavity.

4. The gas-water mixing device according to claim 1, characterized in that: The aerator is arranged in the middle of the accommodating cavity, a third air-water mixing channel is formed between the outer peripheral wall of the aerator and the cavity wall of the accommodating cavity, and a fourth air-water mixing channel is arranged inside the aerator.

5. The gas-water mixing device according to claim 1, characterized in that: The shell is provided with a nozzle between the water inlet end and the aerator, the inner diameter of the nozzle gradually decreases from one end close to the water inlet end to the other end, and the two ends of the nozzle are respectively connected with the water inlet end and the air-water mixing channel.

6. The gas-water mixing device according to claim 3 or 4, characterized in that: A spiral portion is provided in the gas-water mixing channel, and the spiral portion is provided with a spiral channel, and the spiral channel is communicated with the gas-water mixing channel.

7. The gas-water mixing device according to claim 1, characterized in that: The shell is provided with a detachable connection structure on the water inlet end and / or the water outlet end, and the detachable connection structure includes a threaded connection structure or a clamping connection structure.

8. The gas-water mixing device according to claim 1, characterized in that: The accommodating chamber comprises a straight section and an expansion section which are interconnected. The straight section is arranged close to the water inlet end, the expansion section is arranged close to the water outlet end, and the aerator is at least partially arranged in the straight section.

9. The gas-water mixing device according to claim 1, characterized in that: The air inlet pipe is directly connected to the air inlet end of the aerator, or the air inlet pipe is connected to the air inlet end of the aerator through a hose.

10. A water purification device, characterized in that: It comprises a filtering device, an ozone supply device and the gas-water mixing device as described in any one of claims 1 to 9, wherein the gas-water mixing device is connected to the water inlet pipe of the filtering device, and the gas outlet end of the ozone supply device is connected to the gas inlet pipe of the gas-water mixing device.

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