A diffusion apparatus

Abstract

The utility model embodiment provides a kind of diffusion equipment, it includes gas supply unit, diffusion main body, atomization unit, liquid suction pipeline and liquid storage unit, diffusion main body is connected with liquid storage unit and gas supply unit, diffusion outlet is formed on diffusion main body, atomization unit has airflow output channel and liquid output channel, the airflow output channel includes the introduction channel, transition channel and discharge channel connected in airflow conveying direction in proper order, the cross section of the introduction channel is circular, the cross section of the discharge channel is "D" letter shape. By the cross section of discharge channel is D letter shape setting, can reach better gas-liquid ratio, the unit time of diffusion equipment can effectively generate more fog drop, to improve atomization efficiency, ensure the required fragrance concentration level in target space.

Description

Technical Field

[0001] This utility model relates to the field of liquid diffusion technology, and in particular to a diffusion device. Background Technology

[0002] Diffusion devices based on the principle of pneumatic atomization currently occupy an important position in the field of indoor air conditioning. The core of these devices typically includes a gas power module and an atomization chamber structural unit. Their basic working principle is as follows: the high-pressure, high-speed airflow generated by the gas power module is introduced into the atomization chamber, where a strong shear force is applied to the introduced liquid medium, thereby breaking the liquid into micron-sized droplets. These droplets are then diffused into the target air medium with the airflow, achieving functions such as humidification or fragrance diffusion.

[0003] However, current aroma diffusers based on this principle generally suffer from insufficient atomization efficiency. The total amount of effective droplets generated per unit time is low, which restricts the aroma release efficiency and diffusion coverage, making it difficult for the device to maintain the required aroma concentration level in the target space for a sustained period.

[0004] Therefore, based on the above problems, further improvements are needed to the existing technology. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model aims to provide a diffusion device with high-efficiency atomization performance.

[0006] To solve the above-mentioned technical problems, the technical solution used in this utility model is as follows:

[0007] A diffusion device includes a gas supply unit, a diffusion body, an atomizing unit, a liquid intake pipe, and a liquid storage unit. The diffusion body is connected to the liquid storage unit and the gas supply unit. A diffusion outlet is formed on the diffusion body. The atomizing unit is located within the diffusion body, or it is connected to the diffusion body and extends into the liquid storage unit. The atomizing unit has an airflow output channel and a liquid output channel. The airflow output channel is connected to the diffusion body. The airflow supplied by the gas supply unit passes through the diffusion body and enters the airflow output channel. The liquid output channel is connected to the liquid intake pipe, which extends into the liquid storage unit. Liquid in the liquid storage unit is supplied to the liquid output channel via siphon. The output end of the airflow output channel contracts to form a gas outlet. The output end of the outlet channel forms a liquid outlet. The gas outlet and the liquid outlet are spaced at a preset distance and form an angle between their axes. The gas flow ejected from the gas outlet blows from one side of the outer end face of the liquid outlet to the other side, atomizing the liquid output from the liquid outlet. The atomized liquid forms atomized particles, which pass through the diffuser body and are discharged from the diffuser outlet. The airflow output channel includes an inlet channel, a transition channel, and an outlet channel connected sequentially along the airflow conveying direction. The inlet channel has a circular cross-section, and the outlet channel has a "D" shaped cross-section. The outlet channel has an arc-shaped edge and a straight edge parallel to the chord of the arc-shaped edge. The arc-shaped edge is located on the side of the outlet channel away from the liquid outlet, and the straight edge is opposite to the arc-shaped edge and located on the side of the outlet channel closer to the liquid outlet.

[0008] Preferably, the diffuser body has a diffuser cavity communicating with the diffuser outlet. A silencer is installed in the diffuser cavity, and the silencer is located between the atomizing unit and the diffuser outlet. The silencer includes a base plate and multiple concentric annular walls connected to the base plate. An airflow silencer channel is formed between the multiple annular walls, which is composed of multiple concentric annular channels connected in sequence. The inlet of the airflow silencer channel is located on the outermost radial side of the base plate, and the outlet of the airflow silencer channel is located in the innermost annular wall. The outlet of the airflow silencer channel is directly connected to the diffuser outlet. The minimum inner diameter of the diffuser outlet is D1, and the minimum inner diameter of the outlet of the airflow silencer channel is D2. The ratio of D2 to D1 is in the range of 1.4-2.0.

[0009] Preferably, the width of the airflow silencing channel gradually increases from the inside to the outside or is set to a constant width.

[0010] Preferably, all annular walls are circular, with the innermost annular wall having an inner diameter of r1, and the inner diameter of the nth annular wall from the inside out being r.n If the distance between two adjacent annular walls is λ, then r n =r1+λ(x n-1 -1) / (x-1), where n=2,3,4...,x∈[1,2).

[0011] Preferably, the ratio of the cross-sectional area of ​​the airflow silencing channel inlet to the cross-sectional area of ​​the silencing cover is between 0.024 and 0.04, and the number of annular walls is 3.

[0012] Preferably, the silencing cover is located at the upper part of the diffusion cavity, and a buffer cavity is formed below the silencing cover. The mist generated by the atomizing unit is buffered in the buffer cavity and then enters the silencing cover from the inlet of the airflow silencing channel. The ratio of the height of the silencing cover to the height of the diffusion cavity is between 0.4 and 0.6.

[0013] Preferably, the bottom plate of the silencing cover is a cone shape that convexes upwards, and the semi-apex angle of the cone is between 45 degrees and 80 degrees.

[0014] Preferably, the length of the cross-section of the discharge channel in the direction perpendicular to the straight edge is y, the radius of the arc-shaped edge is x, and the ratio of y to x is between 1.5 and 1.7.

[0015] Preferably, the cross-section of the discharge channel has a length L in the direction parallel to the straight side, and the ratio of L to x is between 1.8 and 2.5.

[0016] Preferably, an arc-shaped guide block is provided on the outer side of the arc-shaped edge, and the arc-shaped guide block protrudes outward along the axial direction of the discharge channel relative to the outer end face of the discharge channel.

[0017] Preferably, the inner edge of the arc-shaped guide block is arc-shaped and its radius is equal to the radius of the arc-shaped edge, and the inner edge of the arc-shaped guide block fits into the arc-shaped edge.

[0018] Preferably, the ratio of the inner edge curvature of the arc-shaped guide block to the curvature of the arc-shaped edge is 0.5-0.75, and the height of the arc-shaped guide block is 0.08mm-0.18mm.

[0019] Preferably, the gas supply unit has a start-up phase, a normal operation phase, and an end phase during operation, and the power of the gas supply unit in the start-up phase and the end phase is 50-70% of the power in the normal operation phase.

[0020] Preferably, the gas supply unit intermittently supplies gas to the atomizing unit, with the ratio of gas supply time to intermittent time between 0.1 and 1.

[0021] The diffusion device of this utility model, by setting the cross-section of the discharge channel in a D-shape, can achieve a better gas-liquid ratio compared with the circular cross-section of the discharge channel in the prior art. The diffusion device can effectively generate more droplets per unit time, thereby improving atomization efficiency and ensuring the required fragrance concentration level in the target space. Attached Figure Description

[0022] The above and other objects, features and advantages of the present invention will become clearer through a more detailed description of the preferred embodiments of the present invention shown in the accompanying drawings.

[0023] Figure 1 This is a schematic diagram of the diffusion device according to an embodiment of the present invention.

[0024] Figure 2 This is a partial schematic diagram of the diffusion device according to an embodiment of the present invention.

[0025] Figure 3 This is a schematic diagram of the sound-absorbing cover in the diffusion device.

[0026] Figure 4 This is a 3D view of the atomizing unit.

[0027] Figure 5 for Figure 4 A perspective view of the atomizing unit in the image.

[0028] Figure 6 for Figure 5 A partial schematic diagram.

[0029] Figure 7 for Figure 4 A partial schematic diagram of the atomizing unit. Detailed Implementation

[0030] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand this utility model and implement it. However, the embodiments are not intended to limit this utility model.

[0031] Please refer to Figures 1 to 2 This invention provides a diffusion device for atomizing and diffusing liquid. The diffusion device includes a gas supply unit 1, a diffusion body 2, an atomizing unit 3, a liquid suction pipe 4, and a liquid storage unit 5. The diffusion body 2 is connected to the liquid storage unit 5 and the gas supply unit 1. The gas supply unit may be an air pump, used to provide a high-speed airflow to the diffusion body 2 through a gas supply pipe 11. A diffusion outlet 21 for discharging the atomized liquid is formed on the diffusion body 2. The atomizing unit 3 is located in the diffusion body 2, or the atomizing unit 3 is connected to the diffusion body 2 and extends into the liquid storage unit 5, and is located above the liquid surface in the liquid storage unit 5.

[0032] Atomizing unit 3 can be Figures 4 to 7 The atomizing unit 3a is shown. The atomizing unit 3a includes a liquid phase connection portion 34a and a gas phase connection portion 35a. The gas phase connection portion 35a has an airflow output channel 31a connected to the diffuser body 2. The airflow supplied by the gas supply unit 1 passes through the diffuser body 2 and enters the airflow output channel 31a. The liquid phase connection portion 34a has a liquid output channel 32a connected to a liquid suction pipe 4. The liquid suction pipe 4 extends into the liquid storage unit 5. When the atomizing unit 3 atomizes the liquid, a negative pressure is formed near the liquid output channel 32a, causing the liquid suction pipe 4 to supply the liquid from the liquid storage unit 5 to the liquid output channel 32a via siphon.

[0033] The output end of the airflow output channel 31a contracts to form a gas outlet 313a, and the output end of the liquid output channel 32a forms a liquid outlet 321a, with the axes of the gas outlet 313a and the liquid outlet 321a forming an angle. In this embodiment, the angle is 90°. The airflow ejected from the gas outlet 313a blows from one side of the outer end face of the liquid outlet 321a to the other side, atomizing the liquid output from the liquid outlet 321a. The atomized liquid forms atomized particles, which then pass through the diffuser body 2 and are discharged from the diffuser outlet 21.

[0034] The airflow output channel 31a includes an inlet channel 311a, a transition channel 312a, and an outlet channel 313a connected sequentially along the airflow delivery direction. The outlet channel 313a is the gas outlet 313a. The ratio of the cross-sectional area of ​​the inlet channel 311a to that of the outlet channel 313a is 9-30. When this ratio is less than 9, the acceleration effect of the airflow in the outlet channel 313a is not obvious, and the speed of the output airflow is relatively small. Therefore, under the same output power of the airflow supply unit 1, the atomization amount of the atomizing unit 3 will be significantly smaller. When this ratio is greater than 30, it may cause the airflow to over-expand in the transition channel 312a, forming a shock wave, increasing energy loss, and also affecting the atomization effect.

[0035] The transition channel 312a is truncated cone-shaped (i.e., the inner hole is truncated cone-shaped). The conical surface of the transition channel 312a forms an angle α with the central axis of the discharge channel 313a, with α ranging from 15° to 45°. When α is less than 15°, due to the relatively low velocity of the output airflow, the atomization amount of the atomizing unit 3 will be significantly reduced under the same output power of the airflow supply unit 1, failing to meet the user's needs. When α is greater than 45°, the noise of the diffusion device will significantly increase, exceeding 55 decibels, under the same output power of the airflow supply unit 1, affecting the user experience. Therefore, this embodiment of the invention controls the angle range of α between 15° and 45°, thereby balancing atomization efficiency and noise level.

[0036] The atomizing unit 3a has a protrusion 33a located in front of the gas outlet 313a at a predetermined distance. The protrusion 33a partially obstructs the gas outlet 313a, but does not exceed the central axis of the gas outlet 313a; that is, in the direction perpendicular to the central axis of the gas outlet 313a, the protrusion 33a obstructs no more than half of the gas outlet 313a. The predetermined distance between the protrusion 33a and the gas outlet 313a refers to the portion of the protrusion 33a directly in front of the gas outlet 313a at a predetermined distance from the gas outlet 313a.

[0037] Liquid outlet 321a is located on protrusion 33a, and a guide slope 331a is formed on the side of protrusion 33a facing gas outlet 313a. The guide slope 331a is inclined relative to the end face of gas outlet 313a in a direction away from gas outlet 313a. Figure 6 The viewing angle is tilted upwards), and an angle β is formed between the guide slope 331a and the end face of the gas outlet 313a, with the angle ranging from 5° to 25°. It should be noted that the side of the protrusion 33 facing the gas outlet 313a can be formed by connecting multiple slopes, or its top can have an arc transition. The included angle β referred to here is the angle between the guide slope 331a at the connection point between the protrusion 33a and the end face of the gas outlet 313a, that is... Figure 5 The angle β between the guide slope 331a and the end face of the gas outlet 313a shown in the figure. The range of the angle β has a significant impact on the atomization efficiency and atomization noise of the atomizing unit 3. When β is less than 5°, the atomization efficiency decreases. When β is greater than 25°, the structure loses its guiding function, and the atomized particles generated by the atomizing unit 3 move more irregularly in the cavity, resulting in greater atomization noise.

[0038] Please refer to Figure 6 and Figure 7 In this embodiment, the inlet channel 311a has a circular cross-section, and the outlet channel 313a has a "D"-shaped cross-section. The outlet channel 313a has an arc-shaped edge 3131a and a straight edge 3132a parallel to the chord of the arc-shaped edge 3131a. The arc-shaped edge 3131a is located on the side of the outlet channel 313a away from the liquid outlet 321a, while the straight edge 3132a is opposite to the arc-shaped edge 3131a and located on the side of the outlet channel 313a closer to the liquid outlet 321a. The "D"-shaped outlet channel 313a has high atomization efficiency and can achieve a better gas-liquid ratio.

[0039] Please refer to Figure 7The length of the cross-section of the discharge channel 313a in the direction perpendicular to the straight side 3132a is y, and the radius of the arc-shaped edge 3131a is x. The ratio of y to x ranges from 1.5 to 1.7. When the ratio of y to x is greater than 1.7, the atomization efficiency of the atomizing unit 3a decreases; when the ratio of y to x is less than 1.5, its atomization efficiency also decreases. The length of the cross-section of the discharge channel 313a in the direction parallel to the straight side 3132a is L, and the ratio of L to x ranges from 1.8 to 2.5.

[0040] In a preferred embodiment, an arc-shaped guide block 36a is provided on the outer side of the arc-shaped edge 3131a. The arc-shaped guide block 36a protrudes outward along the axial direction of the discharge channel 313a relative to the outer end face of the discharge channel 313a. Figure 6 From a certain perspective, the arc-shaped guide block 36a protrudes upward relative to the outer end face of the discharge channel 313a. The arc-shaped guide block 36a can enhance the atomization efficiency of the atomizing unit 3a. More preferably, the inner edge of the arc-shaped guide block 36a is arc-shaped and its radius is equal to the radius of the arc-shaped edge 3131a, and the inner edge of the arc-shaped guide block 36a is in contact with the arc-shaped edge 3131a. The ratio of the curvature of the inner edge of the arc-shaped guide block 36a to the curvature of the arc-shaped edge 3131a is 0.5-0.75, and the height of the arc-shaped guide block is 0.08mm-0.18mm.

[0041] Please refer to Figure 2 and Figure 3In a preferred embodiment, a diffusion cavity communicating with the diffusion outlet 21 is formed within the diffusion body 2. A silencer 22 is installed within the diffusion cavity, located between the atomizing unit 3 and the diffusion outlet 21, to reduce the atomization noise of the atomizing unit 3. The silencer 22 includes a base plate 221 and multiple concentric annular walls 222 connected to the base plate 221. An airflow silencer channel 225, formed by multiple concentric annular channels connected sequentially, is formed between the multiple annular walls 222. In a preferred embodiment, the number of annular walls is three. In a preferred embodiment, the diffusion body 2 includes a generally cylindrical body 26 and a top cover 27. The silencer 22 is fixed within the body 26, and the top cover 27 is fixed to the top of the body 26, enclosing the silencer 22 within the body 26. The diffusion outlet 21 is opened on the top cover 27 and corresponds to the position of the silencer 22. The top of the annular wall 222 abuts against the inner wall of the upper cover 27, sealing the upper end of the airflow silencing channel 225. The inlet 223 of the airflow silencing channel 225 is located on the outermost radial side of the base plate 221, and the outlet 224 of the airflow silencing channel 225 is located in the innermost annular wall 222. The outlet 224 of the airflow silencing channel 225 is directly connected to the diffusion outlet 21. The liquid atomized by the atomizing unit 3 enters the airflow silencing channel 225 through the inlet 223, enters the diffusion outlet 21 through the outlet 224, and finally diffuses into the external space. The minimum inner diameter of the diffusion outlet 21 is D1, and the minimum inner diameter of the outlet 224 of the airflow silencing channel 225 is D2. The ratio of D2 to D1 ranges from 1.4 to 2.0. The ratio of D2 to D1 will affect the fluid velocity at the diffusion outlet 21 and the noise of the diffusion device. When the ratio of D2 to D1 is less than 1.4, the noise suppression effect of the silencing cover 22 on the atomizing unit 3 is weakened, and the noise of the diffusion device increases significantly. When the ratio of D2 to D1 is greater than 2.0, the atomized liquid is not easy to drift out from the diffusion outlet 21, which reduces the atomization efficiency and fails to meet the user's needs.

[0042] In a preferred embodiment, the width m of the airflow silencing channel 225 gradually increases from the inside to the outside or is set to a constant width. When the width m of the airflow silencing channel 225 gradually increases from the inside to the outside, the airflow will be accelerated when flowing from the outside to the inside within the airflow silencing channel 225, which is suitable for applications requiring a specific spraying speed or concentration of atomized particles. Preferably, all annular walls 222 are circular, with the innermost annular wall 222 having an inner diameter of r1, and the nth annular wall 222 having an inner diameter of r. n If the distance between two adjacent annular walls 222 is λ, then r n =r1+λ(x n-1 -1) / (x-1), where n=2,3,4...,x∈[1,2).

[0043] In a preferred embodiment, the cross-sectional area of ​​the inlet 223 of the airflow silencing channel 225 (i.e., Figure 3 The ratio of the area of ​​the inlet 223 (as shown in the diagram) to the cross-sectional area of ​​the silencer 22 is between 0.024 and 0.04. In some embodiments, the airflow silencer channel 225 may have multiple inlets 223, where the cross-sectional area of ​​the inlet 223 refers to the sum of the cross-sectional areas of the multiple inlets 223. When the ratio of the inlet 223 to the cross-sectional area of ​​the silencer 22 is less than 0.024, most of the atomized particles cannot enter the silencer 22 and drift out from the diffusion outlet 21, resulting in a low mist output and low atomization efficiency of the diffusion device. When the ratio of the inlet 223 to the cross-sectional area of ​​the silencer 22 is greater than 0.04, the silencing effect of the silencer 22 will be reduced, resulting in higher noise levels in the diffusion device.

[0044] In a preferred embodiment, the silencer 22 is located at the upper part of the diffuser cavity, and a buffer cavity 23 is formed below the silencer 22. The mist generated by the atomizing unit 3 is buffered in the buffer cavity 23 and then enters the silencer 22 from the inlet 223 of the airflow silencer channel 224. The height h of the silencer 22 is... x With respect to the height h of the diffusion cavity t The ratio is between 0.4 and 0.6, and the height h of the diffusion cavity... t The height h of the soundproof cover 22 x The height h of the buffer cavity 23 q The sum. If the height h of the silencer 22 x With respect to the height h of the diffusion cavity t If the ratio is less than 0.4, the flow channel area of ​​the airflow silencing channel 224 is small, the noise reduction effect is not obvious, and more large-diameter droplets are easily carried out of the diffusion outlet 21 by the fluid with a certain kinetic energy, making it easy for droplets to settle around the diffusion device, affecting the user experience; if the height h of the silencing cover 2 ... x With respect to the height h of the diffusion cavity t If the ratio is higher than 0.6, the flow channel area of ​​the airflow silencing channel 224 is larger. More fluid flows through the silencing cover, which will also cause more energy dissipation, making it difficult to guarantee the effective atomization amount of the diffusion outlet 21.

[0045] In a further preferred embodiment, the base plate 221 of the silencer 22 is a conical shape that convexes upwards, and the semi-apex angle θ of the cone (i.e. Figure 1The angle θ between the cone surface and the midline of the apex is between 45 and 80 degrees. When the half-apex angle θ is greater than 80°, more fluid energy will be dissipated by the silencer 22, making it difficult to guarantee the effective atomization of the diffuser outlet 21. Moreover, the droplets settling inside the silencer 22 are not easy to flow back to the liquid storage unit 5. When the half-apex angle θ is less than 45°, the flow channel area of ​​the airflow silencer channel 224 is small, the noise reduction effect is not obvious, and more droplets with larger particle sizes are easily carried out of the diffuser outlet 21 by the fluid with a certain kinetic energy, making it easy for droplets to settle around the diffuser, affecting the user experience.

[0046] Please refer to Figure 2 The lower part of the diffuser body 2 is provided with a connecting part 24 for connecting the liquid storage unit 5. The inner surface of the connecting part 24 is provided with an internal thread, which is engaged with the external thread of the neck of the liquid storage unit 5. The diffuser body 2 is also provided with an airflow input channel 25 connected to the gas supply unit 1. The airflow input channel 25 is integrally formed with the connecting part 24. The first end of the airflow input channel 25 is located on the side wall of the diffuser body 2, and the second end of the airflow input channel 25 extends downward into the connecting part 24. The atomizing unit 3 is located in the connecting part 24, and the inlet channel 311 of the airflow output channel 31 of the atomizing unit 3 is inserted into the second end of the airflow input channel 25. In other embodiments, the second end of the airflow input channel 25 may also extend upward into the buffer cavity 23, and the atomizing unit 3 is also installed in the buffer cavity 23 accordingly.

[0047] In a preferred embodiment, the atomization phase change process is optimized through a dynamic modulation strategy of pneumatic power. The gas supply unit 1 operates with a start-up phase, a normal operating phase, and a termination phase. The power of the gas supply unit 1 during the start-up and termination phases is lower than the power during the normal operating phase, thereby reducing the gas supply pressure to 50%-70% of the normal operating pressure. When existing diffusion devices terminate, liquid accumulates in the liquid output channel 32. When the diffusion device restarts, if the gas supply pressure of the gas supply unit 1 is high, the inertial impact force will peel the accumulated liquid off the structural surface, failing to completely disperse it. This causes large-diameter droplets to spray out from the diffusion outlet 21, resulting in large droplets settling around the diffusion device and affecting the user experience. Therefore, this embodiment of the invention sets the power of the gas supply unit 1 during the start-up phase to be lower than its power during the normal operating phase. This reduces the problem of uncontrolled atomization particle size caused by residual liquid film in the liquid output channel 32. Setting the power during the termination phase to be lower than its power during the normal operating phase reduces liquid accumulation. Therefore, the overall situation of large droplets being sprayed out when the diffusion device restarts can be avoided.

[0048] In a preferred embodiment, the gas supply unit 1 intermittently supplies gas to the atomizing unit 3, with the ratio of supply time to interval time between 0.1 and 1. Since users experience decreased sensitivity to the same odor after prolonged exposure, leading to olfactory fatigue, this embodiment of the invention uses intermittent gas supply from the gas supply unit 1 to avoid olfactory fatigue and extend its service life. When the ratio of supply time to interval time is less than 0.1, the amount of atomized liquid in the air is too low, making it difficult for users to smell the liquid. When the ratio is greater than 1, it can cause olfactory fatigue in users.

[0049] In the description of this specification, the references to terms such as "preferred embodiment," "another embodiment," "other embodiment," or "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0050] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A diffusion device comprising a gas supply unit, a diffusion body, an atomizing unit, a liquid intake pipe, and a liquid storage unit, wherein the diffusion body is connected to the liquid storage unit and the gas supply unit, a diffusion outlet is formed on the diffusion body, the atomizing unit is located in the diffusion body, or the atomizing unit is connected to the diffusion body and extends into the liquid storage unit, the atomizing unit has an airflow output channel and a liquid output channel, the airflow output channel is connected to the diffusion body, the airflow supplied by the gas supply unit passes through the diffusion body and enters the airflow output channel, and the liquid output channel is connected to the liquid storage unit. The liquid intake pipe extends into the liquid storage unit, supplying liquid from the liquid storage unit to the liquid output channel via siphon. The output end of the airflow output channel contracts to form a gas outlet, and the output end of the liquid output channel forms a liquid outlet. The gas outlet and the liquid outlet are spaced a predetermined distance apart, and their axes form an angle. The airflow ejected from the gas outlet blows from one side of the outer end face of the liquid outlet to the other, atomizing the liquid output from the liquid outlet. The atomized liquid forms atomized particles, which pass through the diffuser body and are discharged from the diffuser outlet. The system is characterized in that… The airflow output channel includes an inlet channel, a transition channel, and an outlet channel connected sequentially along the airflow delivery direction. The inlet channel has a circular cross-section, and the outlet channel has a "D"-shaped cross-section. The outlet channel has an arc-shaped edge and a straight edge parallel to the chord of the arc-shaped edge. The arc-shaped edge is located on the side of the outlet channel away from the liquid outlet, and the straight edge is opposite to the arc-shaped edge and located on the side of the outlet channel closer to the liquid outlet.

2. The diffusion apparatus according to claim 1, characterized in that, The diffuser body has a diffuser cavity communicating with the diffuser outlet. A silencer is installed in the diffuser cavity and is located between the atomizing unit and the diffuser outlet. The silencer includes a base plate and multiple concentric annular walls connected to the base plate. An airflow silencer channel is formed between the multiple annular walls, consisting of multiple concentric annular channels connected in sequence. The inlet of the airflow silencer channel is located on the outermost radial side of the base plate, and the outlet of the airflow silencer channel is located in the innermost annular wall. The outlet of the airflow silencer channel is directly connected to the diffuser outlet. The minimum inner diameter of the diffuser outlet is D1, and the minimum inner diameter of the outlet of the airflow silencer channel is D2. The ratio of D2 to D1 is in the range of 1.4-2.

0.

3. The diffusion device according to claim 2, characterized in that, The width of the airflow silencing channel gradually increases from the inside to the outside or is set to a constant width.

4. The diffusion apparatus according to claim 2, characterized in that, The annular walls are all circular, with the innermost annular wall having an inner diameter of r1, and the inner diameter of the nth annular wall from the inside out being r. n If the distance between two adjacent annular walls is λ, then r n =r1+λ(x) n-1 -1) / (x-1), where n=2,3,4...,x∈[1,2).

5. The diffusion apparatus according to claim 2, characterized in that, The ratio of the cross-sectional area of ​​the airflow silencing channel inlet to the cross-sectional area of ​​the silencing cover is between 0.024 and 0.04, and there are 3 annular walls.

6. The diffusion apparatus according to claim 2, characterized in that, The silencer is located at the upper part of the diffuser cavity, and a buffer cavity is formed below the silencer. The mist generated by the atomizing unit is buffered in the buffer cavity and then enters the silencer from the inlet of the airflow silencer channel. The ratio of the height of the silencer to the height of the diffuser cavity is between 0.4 and 0.

6.

7. The diffusion apparatus according to claim 6, characterized in that, The bottom plate of the silencing cover is a cone shape that convexes upwards, and the semi-apex angle of the cone is between 45 degrees and 80 degrees.

8. The diffusion apparatus according to claim 1, characterized in that, The length of the cross-section of the discharge channel in the direction perpendicular to the straight edge is y, the radius of the arc-shaped edge is x, and the ratio of y to x is between 1.5 and 1.

7.

9. The diffusion apparatus according to claim 8, characterized in that, The cross-section of the discharge channel has a length L in the direction parallel to the straight side, and the ratio of L to x is between 1.8 and 2.

5.

10. The diffusion apparatus according to claim 1, characterized in that, An arc-shaped guide block is provided on the outer side of the arc-shaped edge, and the arc-shaped guide block protrudes outward along the axial direction of the discharge channel relative to the outer end face of the discharge channel.

11. The diffusion apparatus according to claim 10, characterized in that, The inner edge of the arc-shaped guide block is arc-shaped and its radius is equal to the radius of the arc-shaped edge. The inner edge of the arc-shaped guide block fits into the arc-shaped edge.

12. The diffusion apparatus according to claim 11, characterized in that, The ratio of the inner edge curvature of the arc-shaped guide block to the curvature of the arc-shaped edge is 0.5-0.75, and the height of the arc-shaped guide block is 0.08mm-0.18mm.

13. The diffusion apparatus according to claim 1, characterized in that, The gas supply unit has a start-up phase, a normal operation phase, and an end phase when it is working. The power of the gas supply unit in the start-up phase and the end phase is 50-70% of the power in the normal operation phase.

14. The diffusion apparatus according to claim 1, characterized in that, The gas supply unit intermittently supplies gas to the atomizing unit, with the ratio of gas supply time to intermittent time between 0.1 and 1.

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