Downward spraying atomizing head

Abstract

The application discloses a downward spraying atomizing head, which comprises a shell, a spraying cavity and a screening cavity. The spraying cavity is arranged in the shell, and the screening cavity is arranged in the spraying cavity. An atomizing nozzle is arranged in the screening cavity. The cavity wall of the screening cavity is provided with screening holes. The spraying cavity is provided with an air outlet channel. The air outlet channel is inclined downward. A gap is left between the air outlet end of the air outlet channel and the inner wall of the shell. The shell is provided with an air outlet. The position of the air outlet corresponds to the air outlet channel. The bottom wall of the shell is provided with a first backflow hole. The application can recycle essential oil gathered on the inner wall of the spraying channel.

Description

TECHNICAL FIELD

[0001] The present application relates to an atomizing head, in particular to a downward spraying atomizing head. BACKGROUND

[0002] The spray structure of the conventional fragrance machine (or called aromatherapy machine / spraying machine) cannot recycle the essential oil collected on the inner wall of the spray channel when spraying downward, so the spray direction of the existing fragrance machine on the market is mostly upward from the top, or obliquely upward from the side or front. In some existing fragrance machines placed in a higher position on the market, such as "suspended / ceiling-mounted fragrance machine", "wall-mounted fragrance machine", "lamp track fragrance machine" and other use scenarios, spraying essential oil upward or obliquely upward will cause the essential oil to collect on the ceiling and condense, thereby polluting the ceiling and greatly reducing the fragrance spreading effect. SUMMARY

[0003] In order to overcome the shortcomings of the prior art, the purpose of the present application is to provide a downward spraying atomizing head which can recycle the essential oil collected on the inner wall of the spray channel.

[0004] The purpose of the present application is achieved by adopting the following technical solutions:

[0005] The downward spraying atomizing head comprises a shell, a spray cavity and a screening cavity. The spray cavity is arranged in the shell, and the screening cavity is arranged in the spray cavity. An atomizing nozzle is arranged in the screening cavity. The cavity wall of the screening cavity is provided with a screening hole. The spray cavity is provided with an air outlet channel. The air outlet channel is inclined downward. A gap is left between the air outlet end of the air outlet channel and the inner wall of the shell. The shell is provided with an air outlet. The position of the air outlet corresponds to the air outlet channel. The bottom wall of the shell is provided with a first backflow hole.

[0006] Specifically, the air outlet channel is arranged inclined downward from the outer wall of the spray cavity to the outside. The included angle between the axial direction of the air outlet channel and the horizontal plane is 20°-25°. The inner wall of the air outlet channel is provided with a flow guide groove arranged along the axial direction of the air outlet channel.

[0007] Specifically, the outer wall of the spray cavity is provided with a flow guide rib plate. The top side edge of the flow guide rib plate is arranged along the bottom side of the air outlet channel. The top end of the front side edge of the flow guide rib plate is flush with the air outlet end edge of the air outlet channel. The front side edge of the flow guide rib plate is arranged inclined backward from top to bottom.

[0008] Specifically, the bottom wall edge of the spray cavity on one side of the air outlet channel and the inner cavity bottom wall of the shell leave a liquid leakage gap.

[0009] Specifically, the screening hole is a circular hole. The diameter of the circular hole is 0.5mm-2.5mm.

[0010] Specifically, the front side wall of the screening cavity is a plane, the screening holes are located on the lateral side walls of the screening cavity, the bottom wall of the screening cavity is provided with second backflow holes, the cross-sectional shape of the spray cavity corresponds to that of the screening cavity, the front wall of the spray cavity is a plane, the air outlet channel is arranged on the front wall of the spray cavity, and the bottom wall of the spray cavity is provided with third backflow holes on the lateral sides.

[0011] Specifically, the bottom wall of the spray cavity is provided with an arc-shaped opening, and the arc-shaped opening is matched with the bottom end profile of the screening cavity.

[0012] Specifically, the inner wall of the shell is provided with two vertically extending positioning strips, the two positioning strips are respectively abutted on the lateral sides of the front side plane of the spray cavity, and the spray cavity and the shell are positioned in the circumferential direction.

[0013] Specifically, the top opening of the shell is provided with a counterbore, the counterbore is fixedly connected with a top cover, the inner top wall of the top cover is provided with two arc-shaped flanges, the top end opening edge of the screening cavity is inserted between the two arc-shaped flanges, and the top end opening edge of the spray cavity is abutted to the inner top wall of the top cover.

[0014] Specifically, the edge of the top cover is provided with a plurality of connecting holes.

[0015] Compared with the prior art, the present application has the following beneficial effects:

[0016] The atomizing and screening cavity is arranged, and large-particle mist droplets are blocked after being screened by the screening cavity, so that the condensation condition of the oil mist in the air outlet channel is greatly reduced, and the risk of oil condensation due to large-particle mist oil being sprayed out of the air outlet channel is prevented.

[0017] Since the gap is left between the air outlet end of the air outlet channel and the inner wall of the shell, the liquid droplets attached to the inner wall of the air outlet channel flow downward along the inner wall of the air outlet channel after confluence, and can directly fall to the bottom wall of the shell. The bottom wall edge of the spray cavity on one side of the air outlet channel leaves a liquid leakage gap between the inner cavity bottom wall of the shell, and the essential oil flowing back along the air outlet channel and falling to the inner cavity bottom wall of the shell can flow back to the essential oil bottle through the liquid leakage gap and the first backflow hole.

[0018] The air outlet channel is arranged to be inclined downward from the inner wall to the outer wall of the spray cavity, and the inner wall bottom side of the air outlet channel is provided with a flow guide groove, which is beneficial to guiding the liquid flow collected on the inner wall of the air outlet channel.

[0019] The top end of the front side edge of the flow guide rib plate is flush with the air outlet end edge of the air outlet channel, and the front side edge of the flow guide rib plate is arranged to be inclined backward from top to bottom, so that the essential oil flowing out through the flow guide groove can be directly drained downward, thereby avoiding the essential oil from being retained and condensed on the bottom side of the air outlet channel. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 isometric view of the downward spraying atomizing head of the present application;

[0021] Figure 2 partial cutaway view of the downward spraying atomizing head of the present application;

[0022] Figure 3 partial exploded view of the downward spraying atomizing head of the present application;

[0023] Figure 4 internal view of the downward spraying atomizing head of the present application;

[0024] Figure 5 internal view of the shell and the spraying cavity;

[0025] Figure 6 isometric view of the spraying cavity.

[0026] In the figure: 1, shell; 11, air outlet; 12, first backflow hole; 13, positioning strip; 14, top cover; 141, arc-shaped flange; 142, connecting hole; 15, air nozzle; 2, spraying cavity; 21, air outlet channel; 211, flow guide groove; 22, flow guide rib; 23, third backflow hole; 24, arc-shaped opening; 3, screening cavity; 31, screening hole; 32, second backflow hole; 4, atomizing nozzle; 41, liquid suction pipe; 5, essential oil bottle. DETAILED DESCRIPTION

[0027] The present application will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the following described embodiments or technical features can be combined in any manner to form new embodiments without conflict.

[0028] See Figures 1 to 6 , the downward spraying atomizing head comprises a shell 1, a spraying cavity 2 and a screening cavity 3. The spraying cavity 2 is arranged in the shell 1, and the screening cavity 3 is arranged in the spraying cavity 2. An atomizing nozzle 4 is arranged in the screening cavity 3, and the cavity wall of the screening cavity 3 is provided with a screening hole 31. The spraying cavity 2 is provided with an air outlet channel 21, which is inclined downward. The air outlet end of the air outlet channel 21 is spaced apart from the inner wall of the shell 1. The shell 1 is provided with an air outlet 11, which is located correspondingly to the air outlet channel 21. The bottom wall of the shell 1 is provided with a first backflow hole 12.

[0029] Specifically, see Figure 2 , Figure 6 The air outlet channel 21 is arranged from the outer wall of the spraying cavity 2 to the inner wall and inclined downward. The included angle between the axial direction of the air outlet channel 21 and the horizontal plane is 20°-25°. The inner wall of the air outlet channel 21 is provided with a flow guide groove 211, which is arranged along the axial direction of the air outlet channel 21.

[0030] Specifically, see Figure 2、 Figure 6 The outer wall of the spray cavity 2 is provided with a flow guide rib plate 22, the top side edge of the flow guide rib plate 22 is arranged along the bottom side of the air outlet channel 21. The top end of the front side edge of the flow guide rib plate 22 is flush with the air outlet end edge of the air outlet channel 21. The front side edge of the flow guide rib plate 22 is arranged to be inclined downward from top to bottom.

[0031] Specifically, the spray cavity 2 is provided with a liquid leakage gap (A in the figure) between the bottom wall edge on one side of the air outlet channel 21 and the bottom wall of the inner cavity of the shell 1. Figure 2

[0032] Specifically, the screening hole 31 is a circular hole, and the diameter of the circular hole is 0.5mm-2.5mm.

[0033] Specifically, as shown in Figures 3 to 6 The screening cavity 3 is in a cylindrical shape, the front side wall of the screening cavity 3 is a plane, and the screening hole 31 is located on the transverse two side walls of the screening cavity 3. The bottom wall of the screening cavity 3 is provided with a second backflow hole 32 (see Figure 2 ). The cross-sectional shape of the spray cavity 2 corresponds to the screening cavity 3, the front wall of the spray cavity 2 is a plane, and the air outlet channel 21 is arranged on the front wall of the spray cavity 2. The bottom wall of the spray cavity 2 is provided with a third backflow hole 23 on the transverse two sides.

[0034] Specifically, as shown in Figure 3 The bottom wall of the spray cavity 2 is provided with an arc-shaped opening 24, and the arc-shaped opening 24 is matched with the bottom end profile of the screening cavity 3.

[0035] Specifically, as shown in Figure 4 The shell 1 is in a cylindrical shape, and the inner wall of the shell 1 is provided with two vertical positioning strips 13, and the two positioning strips 13 are respectively located on the transverse two sides of the front side plane of the spray cavity 2, so that the spray cavity 2 and the shell 1 are circumferentially positioned with each other.

[0036] Specifically, as shown in Figure 2 、 Figure 3 The top end opening of the shell 1 is provided with a counterbore, and the counterbore is fixedly connected with a top cover 14. The inner top wall of the top cover 14 is provided with two arc-shaped flanges 141. The top end opening edge of the screening cavity 3 is inserted between the two arc-shaped flanges 141, and the top end opening edge of the spray cavity 2 abuts against the inner top wall of the top cover 14.

[0037] Specifically, as shown in Figure 2 The edge of the top cover 14 is provided with a plurality of connecting holes 142, and the connecting holes 142 are used for connecting other structures.

[0038] The working principle of the downward spraying atomizing head is as follows:

[0039] ​The screening cavity 3 is provided with an atomizing nozzle 4. The atomizing nozzle 4 extracts essential oil from the essential oil bottle 5 through a liquid suction pipe 41 and sprays the essential oil at high pressure to form essential oil mist. The working principle of the atomizing nozzle 4 can refer to the "atomizing core 3" in Chinese patent CN114028598A. The shell 1 is provided with an air nozzle 15 (see Figure 3 ) for connecting high-pressure air. The air channel of the air nozzle 15 communicates with the air inlet of the atomizing nozzle 4. The edge of the atomizing nozzle 4 is provided with two sealing rubber rings, which play a role in air sealing. The atomizing nozzle 4 can be detached from the shell 1.

[0040] The cavity wall of the screening cavity 3 is provided with a screening hole 31. The screening hole 31 is a circular hole with a hole diameter of 0.5mm-2.5mm. The mist sprayed by the atomizing nozzle 4 contains mist droplets with different particle sizes. The mist droplets with larger particle sizes are either directly sprayed into the inner wall of the top cover 14 or quickly fall and adhere to the inner wall of the screening cavity 3, and then collect into a liquid flow, which flows back to the essential oil bottle 5 through the second backflow hole 32 and the first backflow hole 12. The mist droplets with smaller particle sizes have strong floating ability and can overflow through the screening hole 31.

[0041] The screening hole 31 is located on the lateral side walls of the screening cavity 3. The mist droplets overflowing through the screening hole 31 flow along the contour of the outer wall of the screening cavity 3 from the lateral side walls of the screening cavity 3 to the front wall of the screening cavity 3 (see Figure 4 ), and then are sprayed out through the air outlet channel 21. In the above flow process, the liquid droplets with larger particle sizes fall and adhere to the outer wall of the screening cavity 3 or the inner wall of the spraying cavity 2 under the action of gravity, and then collect and flow back to the essential oil bottle 5 through the third backflow hole 23 and the first backflow hole 12. The above flow process along the contour of the outer wall of the screening cavity 3 causes the liquid droplets with larger particle sizes to flow back, thereby making the particle size of the liquid droplets in the finally sprayed mist smaller.

[0042] The atomizing and screening cavity 3 is provided. After the mist is screened by the atomizing and screening cavity 3, large-particle mist droplets are blocked, thereby greatly reducing the condensation condition of the oil mist at the outlet of the air outlet channel 21 and preventing the risk of oil condensation due to large-particle mist oil being sprayed out of the air outlet channel 21.

[0043] Since there is a gap between the outlet end of the air outlet channel 21 and the inner wall of the shell 1, the liquid droplets adhering to the inner wall of the air outlet channel 21 flow downward along the inner wall of the air outlet channel 21 after converging, and can directly fall to the bottom wall of the shell 1. The spraying cavity 2 leaves a liquid leakage gap (A in the figure) between the edge of the bottom wall on one side of the air outlet channel 21 and the inner cavity bottom wall of the shell 1. The essential oil flowing back along the air outlet channel 21 and falling to the inner cavity bottom wall of the shell 1 can flow back to the essential oil bottle 5 through the liquid leakage gap and the first backflow hole 12.

[0044] The air outlet channel 21 is inclined downward from the outer wall of the spraying cavity 2. The inner wall bottom side of the air outlet channel 21 is provided with a flow guide groove 211, which is beneficial to guiding the liquid flow collected in the inner wall of the air outlet channel 21.

[0045] The top end of the front side edge of the flow guide rib plate 22 is flush with the air outlet end edge of the air outlet channel 21, and the front side edge of the flow guide rib plate 22 is arranged downwardly and rearwardly, so that the essential oil flowing out of the flow guide groove 211 can be directly drained downward, thereby avoiding the essential oil from being retained and condensed at the bottom side of the air outlet channel 21.

[0046] The top end opening of the shell 1 is provided with a counterbore, and the counterbore is fixedly connected with a top cover 14. The inner top wall of the top cover 14 is provided with two arc-shaped flanges 141. The top end opening edge of the screening cavity 3 is inserted between the two arc-shaped flanges 141, and the top end opening edge of the spray cavity 2 abuts against the inner top wall of the top cover 14, so that the mist can basically only flow out through the screening hole 31 and the air outlet channel 21, and a high-pressure spray flow is formed at the air outlet channel 21.

[0047] The above-mentioned embodiments are only preferred embodiments of the present application, and cannot be used to limit the protection scope of the present application. Any non-essential changes and replacements made by those skilled in the art on the basis of the present application shall fall within the protection scope of the present application.

Claims

1. A downward-facing spray atomizing head, characterized in that: The device includes a housing, a spray chamber, and a screening chamber. The spray chamber is located inside the housing, and the screening chamber is located inside the spray chamber. The screening chamber is equipped with an atomizing nozzle, and the wall of the screening chamber is provided with screening holes. The spray chamber has an air outlet channel that is inclined downwards. There is a gap between the air outlet end of the air outlet channel and the inner wall of the housing. The housing has an air outlet that is located corresponding to the air outlet channel. The bottom wall of the housing is provided with a first reflux hole. The spray chamber has a leakage gap between the bottom wall edge on one side of the air outlet channel and the bottom wall of the inner cavity of the housing.

2. The downward spray atomizing head according to claim 1, characterized in that: The air outlet channel is inclined downward from the inside to the outside starting from the outer wall of the spray chamber. The angle between the axial direction of the air outlet channel and the horizontal plane is 20°-25°. A guide groove is provided on the bottom side of the inner wall of the air outlet channel, and the guide groove is arranged along the axial direction of the air outlet channel.

3. The downward spray atomizing head according to claim 1, characterized in that: The outer wall of the spray chamber is provided with a flow guide rib. The top edge of the flow guide rib is provided along the bottom side of the air outlet channel. The top of the front edge of the flow guide rib is flush with the edge of the air outlet end of the air outlet channel. The front edge of the flow guide rib is inclined from top to bottom and backward.

4. The downward spray atomizing head according to claim 1, characterized in that: The screening hole is a round hole with a diameter of 0.5mm-2.5mm.

5. The downward spray atomizing head according to claim 1, characterized in that: The front wall of the screening chamber is flat, the screening holes are located on the two lateral side walls of the screening chamber, the bottom wall of the screening chamber is provided with a second reflux hole, the cross-sectional shape of the spray chamber corresponds to that of the screening chamber, the front wall of the spray chamber is flat, the air outlet channel is located on the front wall of the spray chamber, and the bottom wall of the spray chamber is provided with a third reflux hole on both lateral sides.

6. The downward spray atomizing head according to claim 1, characterized in that: The bottom wall of the spray chamber is provided with an arc-shaped opening, which is adapted to the bottom contour of the screening chamber.

7. The downward spray atomizing head according to claim 1, characterized in that: The inner wall of the housing is provided with two vertically extending positioning strips. The two positioning strips abut against the two transverse sides of the front plane of the spray cavity, so that the spray cavity and the housing are circumferentially positioned relative to each other.

8. The downward spray atomizing head according to claim 1, characterized in that: The top opening of the housing is provided with a countersunk hole, and a top cover is fixed to the countersunk hole. The inner top wall of the top cover is provided with two arc-shaped flanges. The edge of the top opening of the screening chamber is inserted between the two arc-shaped flanges, and the edge of the top opening of the spray chamber abuts against the inner top wall of the top cover.

9. The downward spray atomizing head according to claim 8, characterized in that: The edge of the top cover is provided with several connection holes.

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