CN218609942U - Gas-liquid mixed flow atomizing nozzle and gas-liquid mixed flow atomizing spray head - Google Patents

Abstract

The utility model relates to a sewage purification field, especially a gas-liquid mixed flow atomizing nozzle and gas-liquid mixed flow atomizing shower head. The gas-liquid mixed flow atomizing nozzle comprises a nozzle body and a spiral arm fixedly arranged on the lower side of the nozzle body, wherein a first cavity is arranged in the nozzle body and comprises a gas vortex cavity and a second mixed flow chamber which are communicated with each other; an inner shell is arranged in the first cavity, and the gas vortex cavity is formed between the inner shell and the nozzle body; an annular air injection gap is arranged between the bottom of the inner shell and the nozzle body and is arranged between the gas swirling cavity and the second mixed flow chamber; and a lower air inlet communicated with the gas cyclone cavity is formed in the side wall of the nozzle body. The utility model provides a gas-liquid mixed flow atomizing nozzle has the better benefit of the mixed effect of gas and liquid, and it can adopt the ordinary pressure air to carry out liquid purification or concentration.

Description

Gas-liquid mixed flow atomizing nozzle and gas-liquid mixed flow atomizing spray head

Technical Field

The utility model relates to a sewage purification device field, especially a gas-liquid mixed flow atomizing nozzle and gas-liquid mixed flow atomizing shower head.

Background

Chinese patent application publication No. CN108421655A provides an atomizing nozzle, which includes a gas-liquid conveying assembly and an air cap, wherein a gas passage and a liquid passage are arranged inside the gas-liquid conveying assembly, the gas passage includes a gas inlet and a gas outlet, and the liquid passage includes a liquid inlet and a liquid outlet; the gas inlet is used for compressed gas inflow, and the liquid inlet is used for liquid inflow; the air cap includes a tapered mixing chamber and an impingement wall, the mixing chamber in communication with the gas outlet and the liquid outlet, respectively, the liquid being flowable from the liquid outlet into the mixing chamber, the compressed gas being flowable from the gas outlet into the mixing chamber and impinging the liquid flowing from the liquid outlet to form first atomized liquid droplets; the first atomized liquid droplets are able to flow along the tapered mixing chamber and are accelerated; the tapered mixing chamber has an atomized-droplet outflow opening on a flow path of the first atomized droplet, the impact wall being disposed at the atomized-droplet outflow opening, the first atomized droplet being able to flow out of the tapered mixing chamber from the atomized-droplet outflow opening and to impact with the impact wall to form a second atomized droplet.

In the prior art, gas and liquid are mixed in a mixing cavity for a certain time to form gas-liquid mixed fluid, at the moment, mist is not formed actually, and the impact wall has the function of dispersing a gas-liquid mixture flowing at a high speed into mist liquid drops. In the gas-liquid mixture atomized by the spiral impact wall, particles containing impurities with heavier specific gravity can settle downwards, and the clean water-vapor mixture particles can rise, so that the effect of separating impurities in water is achieved, and the liquid-vapor mixture can be used for liquid concentration.

The degree of homogeneity of the mixture of water and vapor is one of the key factors for improving the purification effect, and when the bubbles in the water are small enough, the specific gravity of the particles of the mixture of water and vapor can be reduced, so that the particles of the clean mixture of water and vapor can rise, and the effect of separating the impurities can be better achieved.

In the atomizing nozzle in the prior art, gas and liquid can be mixed only in the mixing cavity of the air cap, the adopted gas can achieve a certain mixing effect only by high-pressure gas, and the adopted normal-pressure gas cannot achieve the effects of sewage purification or liquid concentration, so that the using effect is unsatisfactory.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model aims to provide a: the gas-liquid mixed flow atomizing nozzle and the gas-liquid mixed flow atomizing spray head have the advantage of better mixing effect of gas and liquid, and can purify or concentrate liquid by adopting normal-pressure air.

The utility model discloses a technical scheme that the solution problem adopted is: a gas-liquid rotational flow spray head comprises a spray nozzle body and a spiral arm fixedly arranged on the lower side of the spray nozzle body, wherein a first cavity is arranged in the spray nozzle body and comprises a gas rotational flow cavity and a second mixed flow chamber which are mutually communicated; an inner shell is arranged in the first cavity, and the gas vortex cavity is formed between the inner shell and the nozzle body; an annular gas injection gap is arranged between the bottom of the inner shell and the nozzle body, and the gas injection gap is arranged between the gas swirling cavity and the second mixed flow chamber; a lower air inlet hole communicated with the gas cyclone cavity is formed in the side wall of the nozzle body; and a mixed rotational flow cavity is arranged in the inner shell, and the lower end of the mixed rotational flow cavity is communicated with the second mixed flow chamber.

Mix the whirl chamber and be used for receiving the gas-liquid mixture of nozzle mount pad, whirl gas in the gas whirl chamber is from gas injection clearance blowout to the second room of mixing, the gas-liquid mixture in the mixed whirl chamber can mix with the air whirl at the second room of mixing again, with the air content in the improvement liquid, then the rethread spiral arm atomizes the gas-liquid mixture, make the density of clean atomized particles lower, and the atomized particles that contain the solid still density higher, consequently, can promote the purifying effect to water or to the concentrated effect of solid.

As a further improvement of the above technical solution, the top of the inner shell is hermetically connected to the top of the nozzle body, and the inner shell, the nozzle body, and the spiral arm are integrally formed by a 3D printing process.

As a further improvement of the technical scheme, the outer edge of the bottom of the inner shell is provided with an oblique angle, the inner wall of the nozzle body is provided with a fillet surface, the fillet surface is arranged at the air injection gap, the width of the air injection gap is a, the range of the a is 0.3-0.8mm, the radius of the fillet is 1-3mm, and the size of the oblique angle is 0.5-2mm.

If set up inlayer casing and nozzle body into two parts that need the assembly, then can lead to the size in jet-propelled clearance not accurate enough because the size in jet-propelled clearance is difficult to measure, consequently need adopt 3D printing technology with the size accuracy in guaranteeing jet-propelled clearance, also can guarantee that the atmospheric pressure of the gaseous whirl of following jet-propelled clearance spun is great for the whirl is gaseous can jet into gas-liquid mixture and mixes with gas-liquid mixture. The fillet and the bevel angle are arranged, so that the manufacturing difficulty of the nozzle body can be reduced, and the air injection pressure of the air injection gap can be ensured as long as the distance between the fillet and the bevel angle is ensured to be 0.3-0.8 mm.

As a further improvement of the above technical solution, a part of the gas swirling chamber located at the lower side of the lower air inlet hole generally has a trend of gradually reducing the cross section, and a cross section line of the lower part of the inner side wall of the gas swirling chamber is zigzag; the section line of the lower part of the outer side wall of the gas vortex cavity is bent inwards. The sawtooth-shaped wall surface has a certain turbulence effect, so that the swirling flow gas generates a certain degree of turbulence, and the mixing effect of the swirling flow gas and the gas-liquid mixture is improved.

As a further improvement of the above technical solution, the spiral arm includes a spiral inner wall, a spiral outer wall, a spiral lower wall and a spiral side wall, the lower end of the side wall of the spiral arm is inclined outward, the side wall is provided with a groove, and the depth of the groove is less than 1mm; a second cavity communicated with the first cavity is formed in the center of the spiral arm, and the second cavity is in a conical shape with a large upper part and a small lower part; the number of turns of the spiral arm is more than 3, the thickness range of the spiral arm in the vertical direction is 7-12mm, and the height range of the spiral arm is 50-70mm. The spiral arm can be produced smoothly only by adopting a 3D printing process, and the groove characteristic is favorable for improving the atomization effect.

As a further improvement of the above technical solution, the number of the lower air inlet holes is multiple, the lower air inlet holes are arranged in an annular array with the central axis of the nozzle body as a rotation center, and an included angle between the central axis of the lower air inlet holes and the central axis of the gas vortex cavity is an acute angle; the nozzle body comprises a first cylindrical mounting column and a second cylindrical or prismatic mounting column, the second mounting column is arranged at the lower end of the first mounting column, the lower air inlet hole is formed in the second mounting column, and a step is formed at the top of the second mounting column. The arrangement mode of the air inlet holes is favorable for forming swirl gas, and the step is favorable for installing the nozzle on the nozzle installation seat and exposing the air inlet holes out of the installation seat.

As a further improvement of the above technical solution, the upper part of the mixing vortex chamber is in a truncated shape with a large top and a small bottom, the lower part of the mixing vortex chamber is in a cylindrical shape, the middle part of the mixing vortex chamber is provided with an oblique angle surface, and the diameter of the lower part of the mixing vortex chamber is smaller than the minimum diameter of the upper part of the mixing vortex chamber.

A gas-liquid mixed flow atomization spray header comprises a gas-liquid mixed flow atomization nozzle and a nozzle mounting seat, wherein the nozzle mounting seat comprises an outer mounting sleeve, an inner mounting sleeve is arranged in the outer mounting sleeve, and a water inlet sleeve is arranged at the top of the inner mounting sleeve; an external gas swirl groove and an external gas jet orifice are formed between the outer mounting sleeve and the inner mounting sleeve; the outer mounting sleeve is provided with an air inlet pipe which is communicated with the external air swirl groove; an annular internal gas swirling cavity is formed between the inner mounting sleeve and the water inlet sleeve, and the cross-sectional area of the internal gas swirling cavity is approximately in a trend of gradually decreasing from top to bottom; the lower part of the inner mounting sleeve is provided with a first mixed flow chamber, and the bottom of the inner gas rotational flow cavity is communicated with the first mixed flow chamber; the inner mounting sleeve is provided with an inner air inlet; the inner air inlet hole is communicated with the inner gas swirling cavity and the outer gas swirling groove; a liquid rotational flow cavity communicated with the first mixed flow chamber is arranged in the water inlet sleeve; the upper part of the nozzle body is arranged in the first mixed flow chamber, the air inlet hole is exposed below the inner mounting sleeve, the air inlet hole is arranged on the inner side of the external gas jet orifice, and the external gas jet orifice is exposed on the outer side of the nozzle body. The nozzle mounting seat has a gas-liquid mixing function, and gas and liquid are mixed in the first mixing chamber and then enter the mixing vortex cavity of the nozzle; the air ejected from the external air jet is used for supplying air to the lower air inlet hole.

As a further improvement of the technical scheme, an included angle between a central axis of the air inlet pipe and a central axis of the external air swirling groove is an acute angle, an included angle between a central axis of the inner air inlet hole and a central axis of the internal air swirling cavity is an acute angle, and the swirling direction of the inner air inlet hole, the swirling direction of the air inlet pipe and the swirling direction of the lower air inlet hole are all consistent.

As an optional technical solution, the nozzle mounting seat includes an air inlet channel and a water inlet channel, and the bottom of the air inlet channel and the bottom of the water inlet channel are both communicated with the top of the mixing vortex cavity; the bottom of the air inlet channel is hermetically provided with a flow restrictor, the flow restrictor is internally provided with a flow restricting channel in an inverted truncated cone shape, the lower part of the flow restrictor is arranged in the mixed rotational flow cavity, and the bottom of the flow restricting channel is communicated with the mixed rotational flow cavity.

The beneficial effects of the utility model are that:

the nozzle body of the gas-liquid mixed flow atomizing nozzle is provided with the first cavity, the first cavity is internally provided with the inner shell, and the gas swirling flow cavity is formed between the inner shell and the nozzle body; therefore, the nozzle of the utility model has the function of gas-liquid mixing, rather than only the function of atomization, and the times and the degree of gas-liquid mixing are increased;

because the times and the degree of gas-liquid mixing are increased, the air purifier can play a good role in mixing and purifying under the condition of adopting normal-pressure air, and the adoption of the normal-pressure air has the advantage of reducing the cost compared with the adoption of compressed gas;

the utility model discloses an among the gas-liquid mixed flow atomizing shower head, first mixed flow room in the nozzle mount pad is used for carrying out first gas-liquid mixture, and this shower head has twice gas-liquid mixture effect.

Drawings

The invention will be further explained with reference to the drawings and the detailed description.

FIG. 1 is a schematic structural diagram of a preferred embodiment of the present invention;

FIG. 2 isbase:Sub>A schematic cross-sectional view taken along the line A-A of FIG. 1;

FIG. 3 is a schematic cross-sectional view taken along the line B-B of FIG. 1;

fig. 4 is a cross-sectional view of a first embodiment of a showerhead of the present invention;

FIG. 5 is a sectional view of a second embodiment of the showerhead of the present invention

Fig. 6 is a sectional view of a nozzle mount according to a first embodiment of the showerhead of the present invention.

In the figure:

100. a shower head;

110. a nozzle;

111. a nozzle body; 1111. a first mounting post; 1112. a second mounting post; 1113. A lower air inlet hole; 1114. a rounded corner surface;

112. a first cavity; 1121. a gas swirl chamber; 1122. a second mixing chamber; 1123. A gas injection gap;

113. an inner shell; 1131. a mixing vortex chamber; 1132. oblique angle;

114. a spiral arm; 1141. a second cavity; 1142. a helical inner wall; 1143. a spiral outer wall; 1144. a helical lower wall; 1145. a helical sidewall; 1146. a groove;

120. a nozzle mount; 121. an outer mounting sleeve; 122. an air inlet pipe; 123. an inner mounting sleeve; 1231. a first mixing chamber; 1232. an inner air inlet hole; 124. a water inlet sleeve; 1241. A liquid vortex chamber; 125. an external gas swirl tank; 126. an external gas jet slot; 127. an external gas jet; 128. an internal gas swirl chamber; 1291. an intake passage; 1292. a water inlet channel; 1293. a flow restrictor.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the terms such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the terms in the present invention by combining the specific contents of the technical solution.

Referring to fig. 1 to 3, a gas-liquid swirler 110 includes: the nozzle comprises a nozzle body 111 and a spiral arm 114 fixedly arranged on the lower side of the nozzle body 111, wherein a first cavity 112 is arranged in the nozzle body 111, and the first cavity 112 comprises a gas vortex cavity 1121 and a second mixed flow chamber 1122 which are communicated with each other; an inner shell 113 is arranged in the first cavity 112, and a gas vortex cavity 1121 is formed between the inner shell 113 and the nozzle body 111; an annular gas injection gap 1123 is arranged between the bottom of the inner shell 113 and the nozzle body 111, and the gas injection gap 1123 is arranged between the gas swirling flow cavity 1121 and the second mixed flow chamber 1122; the side wall of the nozzle body 111 is provided with a lower air inlet hole 1113 communicated with the gas swirling cavity 1121; a mixed vortex cavity 1131 is arranged in the inner shell 113, and the lower end of the mixed vortex cavity 1131 is communicated with the second mixed flow chamber 1122.

The top of the inner shell 113 is hermetically connected with the top of the nozzle body 111, and the inner shell 113, the nozzle body 111 and the spiral arm 114 are integrally formed through a 3D printing process.

In order to accelerate the flow velocity of the gas when the gas swirls in the second flow mixing chamber 1122, the portion of the gas swirling cavity 1121 on the lower side of the lower air inlet hole 1113 generally has a tendency of gradually reducing the cross section, and the cross section line of the lower portion of the inner side wall of the gas swirling cavity 1121 is zigzag; the cross section line of the lower part of the outer side wall of the gas swirling cavity 1121 is bent inward, so that the gas passes through the gas swirling cavity 1121 to be accelerated continuously, and certain gas flow disturbance is generated under the action of a sawtooth-shaped wall surface.

The outer edge of the bottom of the inner shell 113 is provided with an oblique angle 1132, the inner wall of the nozzle body 111 is provided with a fillet surface 1114, the fillet surface 1114 is arranged at an air injection gap 1123, the distance between the upper edge of the oblique angle 1132 and a fillet is a, the range of the a is 0.3-0.8mm, the radius of the fillet is 1-3mm, and the size of the oblique angle 1132 is 0.5-2mm.

The spiral arm 114 comprises a spiral inner wall 1142, a spiral outer wall 1143, a spiral lower wall 1144 and a spiral side wall 1145, the lower end of the side wall of the spiral arm 114 is inclined outwards, a groove 1146 is arranged on the side wall, and the depth of the groove 1146 is less than 1mm; a second cavity 1141 communicated with the first cavity 112 is formed in the center of the spiral arm 114, and the second cavity 1141 is in a conical shape with a large upper part and a small lower part; the number of turns of the spiral arm 114 is 3 or more, the range of the thickness of the spiral arm 114 in the vertical direction is 7-12mm, and the range of the height of the spiral arm 114 is 50-70mm.

The number of the lower air inlet holes 1113 is multiple, the lower air inlet holes 1113 are distributed in an annular array by taking the central axis of the nozzle body 111 as a rotation center, and an included angle between the central axis of the lower air inlet holes 1113 and the central axis of the gas swirling cavity 1121 is an acute angle; the nozzle body 111 includes a first mounting pillar 1111 having a cylindrical shape and a second mounting pillar 1112 having a cylindrical shape or a prismatic shape, the second mounting pillar 1112 is disposed at a lower end of the first mounting pillar 1111, the lower air inlet hole 1113 is disposed on the second mounting pillar 1112, and a step is formed at a top of the second mounting pillar 1112.

The upper portion of mixing whirl chamber 1131 is big end down's frustum shape, and the lower part of mixing whirl chamber 1131 is cylindricly, and the middle part of mixing whirl chamber 1131 is equipped with bevel 1132 face, and the diameter of the lower part of mixing whirl chamber 1131 is less than the minimum diameter of the upper portion of mixing whirl chamber 1131.

Referring to fig. 4 and 6, a first embodiment of the gas-liquid mixed flow atomizing spray header 100;

the atomizing nozzle comprises a gas-liquid mixed flow atomizing nozzle 110 and a nozzle mounting seat 120, wherein the nozzle mounting seat 120 comprises an outer mounting sleeve 121, an inner mounting sleeve 123 is arranged in the outer mounting sleeve 121, and a water inlet sleeve 124 is arranged at the top of the inner mounting sleeve 123; an external air swirl groove 125 and an external air jet opening 127 are formed between the outer mounting sleeve 121 and the inner mounting sleeve 123; an air inlet pipe 122 is arranged on the outer mounting sleeve 121, and the air inlet pipe 122 is communicated with an external air swirl groove 125; an internal gas swirling cavity 128 is formed between the inner mounting sleeve 123 and the water inlet sleeve 124, and the cross-sectional area of the internal gas swirling cavity 128 generally tends to gradually decrease from top to bottom; the lower part of the inner mounting sleeve 123 is provided with a first mixed flow chamber 1231, and the bottom of the inner gas swirling cavity 128 is communicated with the first mixed flow chamber 1231; an inner air inlet hole 1232 is arranged on the inner mounting sleeve 123; the inner air inlet holes 1232 communicate the inner air swirling chamber 128 and the outer air swirling groove 125; a liquid swirl cavity 1241 communicated with the first flow mixing chamber 1231 is arranged in the water inlet sleeve 124; the upper part of the nozzle body 111 is arranged in the first mixed flow chamber 1231, the air inlet hole is exposed below the inner mounting sleeve 123, the air inlet hole is arranged at the inner side of the external air jet opening 127, and the external air jet opening 127 is exposed at the outer side of the nozzle body 111.

The included angle between the central axis of the air inlet pipe 122 and the central axis of the external air swirling groove 125 is an acute angle, the included angle between the central axis of the inner air inlet hole 1232 and the central axis of the internal air swirling cavity 128 is an acute angle, and the rotating directions of the inner air inlet hole 1232, the air inlet pipe 122 and the lower air inlet hole 1113 are all the same.

When the gas swirl chamber is used, gas enters the external gas swirl chamber 125 from the gas inlet pipe 122, part of the gas in the external gas swirl chamber 125 enters the internal gas swirl chamber 128 from the internal gas inlet holes 1232, the gas enters the first mixed flow chamber 1231 after being rotationally accelerated in the internal gas swirl chamber 128, and liquid enters the first mixed flow chamber 1231 from the liquid swirl chamber 1241 to be mixed with the gas, so that a gas-liquid mixture is formed preliminarily;

part of the gas in the external gas swirling groove 125 enters the gas swirling cavity 1121 through the external gas jet opening 127 and the lower gas inlet hole 1113;

the primarily formed gas-liquid mixture enters the mixed rotational flow cavity 1131 for rotational flow acceleration and then enters the second mixed flow chamber 1122, the gas in the gas rotational flow cavity 1121 enters the second mixed flow chamber 1122 through the gas injection gap 1123, the gas and the primarily formed gas-liquid mixture are mixed in the second mixed flow chamber 1122, and the gas-liquid mixed flow atomization spray header can adopt normal-pressure air for liquid purification or concentration.

Referring to fig. 5, a second embodiment of the gas-liquid mixed flow atomizing showerhead 100 is different from the first embodiment of the gas-liquid mixed flow atomizing showerhead 100 in that:

the nozzle mounting base 120 comprises an air inlet channel 1291 and a water inlet channel 1292, wherein the bottom of the air inlet channel 1291 and the bottom of the water inlet channel 1292 are both communicated with the top of the mixing vortex cavity 1131; the bottom of the air inlet channel 1291 is hermetically provided with a flow restrictor 1293, the flow restrictor 1293 is internally provided with a flow limiting channel in an inverted truncated cone shape, the lower part of the flow restrictor 1293 is arranged in the mixing cyclone cavity 1131, and the bottom of the flow limiting channel is communicated with the mixing cyclone cavity 1131.

The use principle is as follows: the gas in the flow restrictor 1293 and the liquid in the water inlet channel 1292 are primarily mixed in the mixing vortex cavity 1131 to form a gas-liquid mixture, the gas-liquid mixture enters the second mixing chamber 1122 to be mixed with the air ejected from the air ejecting gap 1123 again, and the gas-liquid mixture is finally atomized by the spiral arm 114.

The above is only the preferred embodiment of the present invention, not limiting the patent scope of the present invention, all of which are under the concept of the present invention, the equivalent structure transformation made by the contents of the specification and the drawings is utilized, or the direct or indirect application is included in other related technical fields in the patent protection scope of the present invention.

Claims (10)

1. The utility model provides a gas-liquid mixed flow atomizing nozzle, includes nozzle body (111) and fixed spiral arm (114) that sets up in nozzle body (111) downside, be equipped with first cavity (112) in nozzle body (111), its characterized in that:

the first cavity body (112) comprises a gas vortex cavity (1121) and a second mixing chamber (1122) which are communicated with each other;

an inner shell (113) is arranged in the first cavity (112), and the gas vortex cavity (1121) is formed between the inner shell (113) and the nozzle body (111);

an annular gas injection gap (1123) is formed between the bottom of the inner shell (113) and the nozzle body (111), and the gas injection gap (1123) is arranged between the gas vortex cavity (1121) and the second flow mixing chamber (1122);

a lower air inlet hole (1113) communicated with the gas vortex cavity (1121) is formed in the side wall of the nozzle body (111);

a mixed rotational flow cavity (1131) is arranged in the inner shell (113), and the lower end of the mixed rotational flow cavity (1131) is communicated with the second mixed flow chamber (1122).

2. The nozzle of claim 1, wherein:

the top of the inner shell (113) is connected with the top of the nozzle body (111) in a sealing mode, and the inner shell (113), the nozzle body (111) and the spiral arm (114) are integrally formed through a 3D printing process.

3. The nozzle of claim 2, wherein:

the outer edge of the bottom of inlayer casing (113) is equipped with bevel (1132), is equipped with fillet face (1114) on the inner wall of nozzle body (111), fillet face (1114) are located jet-propelled clearance (1123) department, the width of jet-propelled clearance (1123) is a, and the scope of a is 0.3-0.8mm, the radius of fillet is 1-3mm, the size of bevel (1132) is 0.5-2mm.

4. The nozzle of claim 1, wherein:

the part of the gas swirling cavity (1121) positioned at the lower side of the lower air inlet hole (1113) approximately has the trend of gradually reducing the cross section, and the cross section line of the lower part of the inner side wall of the gas swirling cavity (1121) is zigzag; the cross section line of the lower part of the outer side wall of the gas vortex cavity (1121) is bent inwards.

5. The nozzle of claim 1, wherein:

the spiral arm (114) comprises a spiral inner wall (1142), a spiral outer wall (1143), a spiral lower wall (1144) and a spiral side wall (1145), the lower end of the side wall of the spiral arm (114) inclines outwards, a groove (1146) is formed in the side wall, and the depth of the groove (1146) is less than 1mm;

a second cavity (1141) communicated with the first cavity (112) is formed in the center of the spiral arm (114), and the second cavity (1141) is in a conical shape with a large upper part and a small lower part;

the number of turns of the spiral arm (114) is more than 3, the thickness range of the spiral arm (114) in the vertical direction is 7-12mm, and the height range of the spiral arm (114) is 50-70mm.

6. The nozzle of claim 1, wherein:

the number of the lower air inlet holes (1113) is multiple, the lower air inlet holes (1113) are distributed in an annular array by taking the central axis of the nozzle body (111) as a rotation center, and an included angle between the central axis of the lower air inlet holes (1113) and the central axis of the gas vortex cavity (1121) is an acute angle;

nozzle body (111) is including being cylindric first erection column (1111) and being second erection column (1112) of cylinder or prism form, second erection column (1112) are located the lower extreme of first erection column (1111), lower inlet port (1113) are located on second erection column (1112), the top of second erection column (1112) is formed with the step.

7. The nozzle of claim 1, wherein:

the upper portion of mixing whirl chamber (1131) is big-end-up's truncated cone shape, the lower part of mixing whirl chamber (1131) is cylindricly, the middle part of mixing whirl chamber (1131) is equipped with bevel (1132) face, the diameter of the lower part of mixing whirl chamber (1131) is less than the minimum diameter on the upper portion of mixing whirl chamber (1131).

8. A gas-liquid mixed flow atomizing showerhead comprising the gas-liquid mixed flow atomizing nozzle of any one of claims 1-7, further comprising a nozzle mount (120), characterized in that:

the nozzle mounting seat (120) comprises an outer mounting sleeve (121), an inner mounting sleeve (123) is arranged in the outer mounting sleeve (121), and a water inlet sleeve (124) is arranged at the top of the inner mounting sleeve (123);

an external air swirl groove (125) and an external air jet orifice (127) are formed between the outer mounting sleeve (121) and the inner mounting sleeve (123); an air inlet pipe (122) is arranged on the outer mounting sleeve (121), and the air inlet pipe (122) is communicated with the external air swirl groove (125);

an annular internal gas swirling cavity (128) is formed between the inner mounting sleeve (123) and the water inlet sleeve (124), and the cross-sectional area of the internal gas swirling cavity (128) is approximately in a trend of gradually reducing from top to bottom; a first mixed flow chamber (1231) is arranged at the lower part of the inner mounting sleeve (123), and the bottom of the inner gas swirling cavity (128) is communicated with the first mixed flow chamber (1231);

an inner air inlet hole (1232) is formed in the inner mounting sleeve (123); the inner air inlet hole (1232) is communicated with the inner gas swirling cavity (128) and the outer gas swirling groove (125);

a liquid rotational flow cavity (1241) communicated with the first flow mixing chamber (1231) is arranged in the water inlet sleeve (124);

the upper part of the nozzle body (111) is arranged in the first flow mixing chamber (1231), the air inlet hole is exposed below the inner mounting sleeve (123), the air inlet hole is arranged on the inner side of the external air jet port (127), and the external air jet port (127) is exposed on the outer side of the nozzle body (111).

9. The gas-liquid mixed flow atomizing spray header of claim 8, characterized in that:

the included angle between the central axis of intake pipe (122) and the central axis of outside gas whirl groove (125) is the acute angle, the central axis of interior inlet port (1232) with the included angle between the central axis of inside gas whirl chamber (128) is the acute angle, the direction of rotation of interior inlet port (1232), the direction of rotation of intake pipe (122) with the direction of rotation of lower inlet port (1113) all is unanimous.

10. A gas-liquid mixed flow atomizing showerhead comprising the gas-liquid mixed flow atomizing nozzle of any one of claims 1-7, further comprising a nozzle mount (120), characterized in that:

the nozzle mounting seat (120) comprises an air inlet channel (1291) and a water inlet channel (1292), wherein the bottom of the air inlet channel (1291) and the bottom of the water inlet channel (1292) are communicated with the top of the mixing vortex cavity (1131);

a flow restrictor (1293) is hermetically installed at the bottom of the air inlet channel (1291), a flow restricting channel in an inverted truncated cone shape is arranged in the flow restrictor (1293), the lower part of the flow restrictor (1293) is arranged in the mixing vortex cavity (1131), and the bottom of the flow restricting channel is communicated with the mixing vortex cavity (1131).

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