An aerosol valve and aerosol spray device

Abstract

The application discloses an aerosol valve and an aerosol spraying device. The aerosol valve is applied to the aerosol spraying device. The aerosol valve comprises a valve body connected with a sealing cup. A valve cavity is arranged in the valve body and can be used for allowing liquid in an aerosol tank to enter. A valve rod is arranged in the valve cavity and can slide up and down. The upper end of the valve rod penetrates the sealing cup. A spray cavity is arranged on the valve rod. An air inlet structure is arranged between the valve body and the valve rod. When the valve rod slides downward, the air inlet structure is used for allowing compressed gas in the aerosol tank to enter the spray cavity. A liquid inlet structure is arranged between the valve body and the valve rod. The liquid inlet structure is used for allowing the liquid in the aerosol tank to enter the spray cavity from the valve cavity. A flow guide structure is arranged in the spray cavity. The flow guide structure can guide the liquid and the compressed gas and make the liquid and the compressed gas mix and flow out in the spray cavity. The aerosol spraying device comprises an aerosol tank with a tank opening and an actuator which is inserted into the upper end of the valve rod and can be used for spraying the liquid in a mist form. A convex edge is arranged at the tank opening of the aerosol tank. A connecting flange is arranged on the sealing cup. The connecting flange is buckled on the convex edge and is used for fixing the aerosol valve on the aerosol tank.

Description

[Technical Field]

[0001] This invention relates to the field of aerosol product technology, and more particularly to an aerosol valve and an aerosol spraying device using the aerosol valve. [Background Technology]

[0002] The aerosol industry has faced two major shocks in its more than half a century of development. The first occurred in the 1970s and lasted until the mid-1980s, culminating in the Montreal Protocol of 1987, which explicitly prohibited the use of chlorofluorocarbons (CFCs) in aerosols. As substitutes, petrochemical gases, primarily liquefied petroleum gas (LPG) and dimethyl ether (DME), became the new propellant sources for aerosols. The second shock involved the debate over reducing or even restricting the use of volatile organic compounds (VOCs) in aerosols. Since LPG and DME themselves are VOCs, they also faced eventual replacement. Compressed gases such as air, nitrogen, and carbon dioxide, due to their non-destructive effects on the ozone layer and the overall ecosystem, and their lack of flammability, are considered superior propellant alternatives after the two shocks to the aerosol industry.

[0003] Currently, in aerosol cans using compressed gas as a propellant, the aerosol valves typically only allow compressed gas to squeeze the liquid inside the aerosol can and spray it onto an actuator, where it is then atomized by the actuator nozzle. Such aerosol valve structures, as disclosed in Chinese Patent Application No. CN201620896344.X entitled "A Powder-Spraying Aerosol Valve Structure," generally include a valve body connected to a sealing cup, a valve stem disposed within the valve body's cavity, one end of the valve stem passing through the sealing cup and valve body, an inner sealing gasket pressed between the end of the valve body and the inner wall of the sealing cup, and the inner sealing gasket fitted onto one end of the valve stem, forming a movable seal with the valve stem. One end of the valve stem has a spray chamber, and the middle of the valve stem has a flow-limiting orifice. The inner wall of the valve body's cavity and the outer wall of the valve stem together form a spray gap. By controlling whether the flow-limiting orifice in the spray channel connects with the spray gap, the liquid ejected from the product can be controlled. However, compressed gases generally do not have the effect of "liquid vaporization," that is, they do not have the phenomenon of rapid vaporization of liquefied gas during the discharge of liquid from the aerosol spraying device. This rapid expansion during vaporization leads to the formation of a fine spray. Moreover, the aforementioned aerosol valves themselves cannot achieve atomization. Therefore, when using compressed gas as a propellant, aerosol products using conventional aerosol valves often have problems such as large spray particle size and poor atomization effect.

[0004] Therefore, the present invention was developed based on the above-mentioned shortcomings. [Summary of the Invention]

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide an aerosol valve with a simple structure and improved atomization effect. This invention also provides an aerosol spraying device using the aerosol valve.

[0006] This invention is achieved through the following technical solution:

[0007] An aerosol valve, characterized in that: it includes a valve body 2 connected to a sealing cup 1, the valve body 2 having a valve chamber 21 for liquid to enter from the aerosol can, a valve stem 3 having its upper end protruding from the sealing cup 1 and slidably mounted inside the valve chamber 21, a spray chamber 31 being mounted on the valve stem 3, an air inlet structure 4 for compressed gas from the aerosol can to enter the spray chamber 31 when the valve stem 3 slides downwards, and a liquid inlet structure 5 for liquid from the aerosol can to enter the spray chamber 31 from the valve chamber 21, and a flow guide structure 6 for guiding the liquid and compressed gas and allowing them to mix and flow out within the spray chamber 31.

[0008] The aerosol valve described above is characterized in that: the air inlet structure 4 and the liquid inlet structure 5 are arranged opposite to each other, and the flow guiding structure 6 includes a gas guiding surface 61 on one side of the air inlet structure 4 that can guide the compressed gas into a vortex shape and a liquid guiding surface 62 on one side of the liquid inlet structure 5 that can guide the liquid into a vortex shape. The vortex-shaped compressed gas and the vortex-shaped liquid have the same rotation direction, so that the compressed gas and the liquid are mixed in a vortex shape.

[0009] The aerosol valve described above is characterized in that: the flow guiding structure 6 is a protrusion in the middle of the bottom wall of the spray chamber 31, the outer wall of the protrusion is spaced apart from the inner wall of the spray chamber 31, and the gas guiding surface 61 and the liquid guiding surface 62 are respectively provided on both sides of the protrusion.

[0010] The aerosol valve described above is characterized in that: the gas guiding surface 61 includes a first arc concave surface facing the air inlet structure 4 and a first arc convex surface connected to the first arc concave surface; the liquid guiding surface 62 includes a second arc concave surface facing the liquid inlet structure 5 and a second arc convex surface connected to the second arc concave surface.

[0011] The aerosol valve described above is characterized in that: the air intake structure 4 includes an air inlet 41 provided on the side wall of the valve body 2 for compressed gas from the aerosol can to enter, and a gas nozzle 42 provided on the side wall of the valve stem 3 and connecting the air inlet 41 and the spray chamber 31 when the valve stem 3 slides downward.

[0012] The aerosol valve described above is characterized in that: the air inlet 41 includes a large air inlet end 411 for compressed gas to enter, and a small air inlet end 412 for connecting the large air inlet end 411 and the gas nozzle 42, and having a smaller diameter than the large air inlet end 411.

[0013] The aerosol valve described above is characterized in that: the liquid inlet structure 5 includes a liquid nozzle 52 disposed on the side wall of the valve stem 3 and connecting the valve chamber 21 and the spray chamber 31 when the valve stem 3 slides downward.

[0014] The aerosol valve described above is characterized in that: both the gas nozzle 42 and the liquid nozzle 52 include an inlet section, an outlet section with a diameter smaller than that of the inlet section and communicating with the spray chamber 31, and a transition section connected between the inlet section and the outlet section, with the diameter gradually decreasing from the inlet section to the outlet section.

[0015] The aerosol valve described above is characterized in that: a sealing gasket 8 is installed between the valve body 2 and the sealing cup 1, and a sealing gasket 8 is installed on the valve stem 3; the gas nozzle 42 and the liquid nozzle 52 are located above the sealing gasket 8; when the valve stem 3 slides downward, the gas nozzle 42 moves below the sealing gasket 8 and communicates with the air inlet 41, and the liquid nozzle 52 moves below the sealing gasket 8 and communicates with the valve cavity 21; and a spring 9 is provided in the valve cavity 21 that can spring the valve stem 3 upward to reset.

[0016] An aerosol spraying device using the above-mentioned aerosol valve includes an aerosol can 20 with a can opening and an actuator 30 inserted into the upper end of a valve stem 3 and capable of spraying liquid in a mist form. The device is characterized in that: the can opening of the aerosol can 20 is provided with a raised edge 201, and the sealing cup 1 is provided with a connecting flange 12 that fastens to the raised edge 201 to fix the aerosol valve to the aerosol can 20.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. In this invention, the compressed gas entering the ejection chamber from the air intake structure and the liquid entering the ejection chamber from the liquid intake structure are guided by the flow guide structure to form a two-phase flow, so that the airflow mixes and impacts the liquid to disperse the liquid. The structure is simple and can perform preliminary atomization before atomization by the actuator, improve the atomization effect, meet the atomization requirements of using compressed gas as a propellant, and is beneficial to environmental protection.

[0019] 2. In this invention, the gas flow rate increases after the compressed gas passes through the air inlet with the aperture decreasing from large to small, which facilitates the dispersal of the liquid. [Attached Image Description]

[0020] Figure 1 This is a perspective view of the present invention;

[0021] Figure 2 This is a cross-sectional view of the initial state of the present invention;

[0022] Figure 3 This is a cross-sectional view of the present invention in use;

[0023] Figure 4 yes Figure 3 Cross-sectional view at point AA;

[0024] Figure 5 This is an exploded view of the present invention;

[0025] Figure 6 This is a schematic diagram of the structure of an aerosol spraying device equipped with the aerosol valve of the present invention.

Detailed Implementation Methods

[0026] The present invention will now be further described with reference to the accompanying drawings:

[0027] like Figures 1 to 6 As shown, an aerosol valve includes a valve body 2 connected to a sealing cup 1. The valve body 2 has a valve chamber 21 for allowing liquid from the aerosol can to enter. A valve stem 3, with its upper end extending out of the sealing cup 1, is slidably disposed in the valve chamber 21. The valve stem 3 has a spray chamber 31. An air inlet structure 4 is provided between the valve body 2 and the valve stem 3 for allowing compressed gas from the aerosol can to enter the spray chamber 31 when the valve stem 3 slides downward, and a liquid inlet structure 5 for allowing liquid from the aerosol can to enter the spray chamber 31 from the valve chamber 21. The spray chamber 31 has a flow guide structure 6 for guiding the liquid and compressed gas and allowing them to mix and flow out within the spray chamber 31. In this invention, the compressed gas entering the ejection chamber from the air intake structure and the liquid entering the ejection chamber from the liquid inlet structure are guided by the flow guide structure to form a two-phase flow, which causes the airflow to mix and impact the liquid, thus dispersing the liquid. The structure is simple and can perform preliminary atomization before atomization by the actuator, improving the atomization effect and meeting the atomization requirements of using compressed gas as a propellant, which is beneficial to environmental protection.

[0028] like Figure 4 As shown, the air intake structure 4 and the liquid intake structure 5 are arranged opposite to each other. The flow guiding structure 6 includes a gas guiding surface 61 on one side of the air intake structure 4 that can guide the compressed gas into a vortex shape and a liquid guiding surface 62 on one side of the liquid intake structure 5 that can guide the liquid into a vortex shape. The vortex-shaped compressed gas and the vortex-shaped liquid have the same rotation direction, so that the compressed gas and the liquid are mixed in a vortex shape.

[0029] Specifically, the flow guiding structure 6 is a protrusion in the middle of the bottom wall of the ejection chamber 31, with the outer wall of the protrusion spaced apart from the inner wall of the ejection chamber 31, and the gas guiding surface 61 and the liquid guiding surface 62 respectively located on both sides of the protrusion.

[0030] Specifically, the gas guiding surface 61 includes a first arcuate concave surface facing the air inlet structure 4 and a first arcuate convex surface connected to the first arcuate concave surface; the liquid guiding surface 62 includes a second arcuate concave surface facing the liquid inlet structure 5 and a second arcuate convex surface connected to the second arcuate concave surface. The flow guiding structure 6 is approximately S-shaped.

[0031] The air intake structure 4 includes an air intake hole 41 on the side wall of the valve body 2 for compressed gas from the aerosol can to enter, and a gas nozzle 42 on the side wall of the valve stem 3 that connects the air intake hole 41 and the ejection chamber 31 when the valve stem 3 slides downward. The liquid intake structure 5 includes a liquid nozzle 52 on the side wall of the valve stem 3 that connects the valve chamber 21 and the ejection chamber 31 when the valve stem 3 slides downward. The gas nozzle 42 and the liquid nozzle 52 are located on both sides of the flow guide structure 6. The gas nozzle 42 is directly opposite the first concave arc surface of the gas guide surface 61, and the liquid nozzle 52 is directly opposite the second concave arc surface of the liquid guide surface 62. When the air intake hole 41 connects to the gas nozzle 42 and the valve chamber 21 connects to the liquid nozzle 52, the compressed gas and liquid are sprayed onto both sides of the flow guide structure 6 and flow along the approximately S-shaped guide surface of the flow guide structure 6, eventually intertwining into a two-phase swirling flow.

[0032] Furthermore, the air inlet 41 includes a large air inlet end 411 for compressed gas to enter, and a small air inlet end 412 for connecting the large air inlet end 411 and the gas nozzle 42, with a diameter smaller than that of the large air inlet end 411. The above structure can control the air intake velocity. After the compressed gas passes through the air inlet with the diameter decreasing from large to small, the gas velocity increases, which facilitates the dispersion of liquid.

[0033] Furthermore, both the gas nozzle 42 and the liquid nozzle 52 include an inlet section, an outlet section with a smaller diameter than the inlet section and communicating with the spray chamber 31, and a transition section connecting the inlet section and the outlet section, with the diameter gradually decreasing from the inlet section to the outlet section. After the fluid passes through the gas nozzle 42 and the liquid nozzle 52, whose orifice diameters transition from large to small, the flow velocity of the gas and liquid entering the spray chamber 31 increases, which is more conducive to dispersing the liquid, thereby making the sprayed aerosol product atomized finer and more uniformly.

[0034] In this invention, a sealing washer 8, which is movable and fitted onto the valve stem 3, is installed between the valve body 2 and the sealing cup 1. Specifically, the sealing washer 8 is installed in the mounting groove 23 at the end of the valve body 2, and is clamped between the valve body 2 and the sealing cup 1 after the valve body 2 is snapped onto the sealing cup 1. Figure 2 As shown, in the initial state, the gas nozzle 42 and the liquid nozzle 52 are located above the sealing gasket 8, separated from the air inlet 41 and the valve chamber 21; Figure 3 As shown, when the valve stem 3 slides downward, the gas nozzle 42 moves below the sealing gasket 8 and communicates with the air inlet 41, while the liquid nozzle 52 moves below the sealing gasket 8 and communicates with the valve cavity 21. The valve cavity 21 is equipped with a spring 9 that can push the valve stem 3 upward to reset. The lower end of the spring 9 abuts against the bottom wall of the valve cavity 21, and the upper end abuts against the lower end of the valve stem 3. When the valve stem 3 slides downward to allow the two-phase flow to be ejected, the spring 9 can push the valve stem 3 upward to reset, so that the gas nozzle 42 and the liquid nozzle 52 are located above the sealing gasket 8, thus resealing the aerosol valve.

[0035] In this invention, the valve stem 3 is provided with a longitudinally extending guide groove 32, and the valve cavity 21 is provided with a guide slider 22 that is inserted into the guide groove 32 and slides along the guide groove 32 when the valve stem 3 slides up and down relative to the valve body 2. Specifically, two opposing guide sliders 22 are provided on the inner wall of the valve cavity 21, and correspondingly, guide grooves 32 are provided on both sides of the outer peripheral wall of the valve stem 3. When the valve stem 3 slides up and down relative to the valve body 2, the guide groove 32 and the guide slider 22 provide sliding guidance for the valve stem 3, making the valve stem slide stably and preventing misalignment, thus ensuring the unimpeded operation of the air intake structure and the liquid intake structure.

[0036] like Figure 6 As shown, an aerosol spraying device using the aforementioned aerosol valve includes an aerosol can 20 with a can opening and an actuator 30 inserted into the upper end of a valve stem 3 to supply liquid in a mist spray form. The actuator 30 adopts a two-piece precision mist dot structure, which is assembled from a mist dot body device and a mist dot diversion and positioning column device. The atomized particles are fine, the spray is gentle, and the noise is low. For the structure and principle of the mist dot structure, please refer to our company's previously applied Chinese patent, application number CN201510036877.0, patent name is A Two-Piece Precision Mist Dot. The can opening of the aerosol can 20 is provided with a raised edge 201, and the sealing cup 1 is provided with a connecting flange 12 that fastens the aerosol valve to the aerosol can 20 by fastening it to the raised edge 201. Specifically, the sealing cup 1 is provided with a sealing cup gasket 11. When the connecting flange 12 and the protruding edge 201 cooperate to install the sealing cup 1 on the aerosol can 20, the sealing cup 1 presses the sealing cup gasket 11 tightly against the can opening end of the aerosol can 20, thereby achieving a fixed seal between the sealing cup 1 and the aerosol can 20. A suction tube 10 is connected to the liquid inlet at the lower end of the valve body 2, and the suction tube 10 extends into the aerosol can 20. Because the gas phase is in the upper part of the can and the liquid phase is in the lower part of the can, when the aerosol valve is installed on the aerosol can 20 and used, the liquid enters the valve chamber 21 from the suction tube 10, and then is sprayed into the spray chamber 31 through the liquid nozzle 52, while the gas enters from the air inlet 41, passes through the gas nozzle 42 and is sprayed into the spray chamber 31. The compressed gas and liquid are sprayed onto both sides of the S-shaped block and flow along the S-shaped block on both sides, finally intertwining into a two-phase swirling flow. The airflow mixes and impacts, dispersing the liquid. Finally, when the actuator sprays out, the spray particle size is small and the atomization effect is good.

Claims

1. An aerosol valve, characterized in that: The device includes a valve body (2) connected to a sealing cup (1), a valve chamber (21) for liquid from the aerosol can into which it enters, a valve stem (3) extending out of the sealing cup (1) and slidably mounted in the valve chamber (21), and a spray chamber (31) on the valve stem (3). Between the valve body (2) and the valve stem (3) is an air intake structure (4) for compressed gas from the aerosol can into the spray chamber (31) when the valve stem (3) slides downwards, and a liquid intake structure (5) for liquid from the aerosol can into the spray chamber (31) from the valve chamber (21). The spray chamber (31) is equipped with a mechanism for guiding the liquid and compressed gas into the spray chamber (31). The flow guide structure (6) is used to guide the mixed flow out of the cavity. The air intake structure (4) and the liquid intake structure (5) are arranged opposite to each other. The flow guide structure (6) includes a gas guide surface (61) on one side of the air intake structure (4) that can guide the compressed gas into a vortex shape and a liquid guide surface (62) on one side of the liquid intake structure (5) that can guide the liquid into a vortex shape. The vortex-shaped compressed gas and the vortex-shaped liquid have the same rotation direction, so that the compressed gas and the liquid are mixed in a vortex shape. The flow guide structure (6) is a protrusion in the middle of the bottom wall of the ejection cavity (31). The outer wall of the protrusion is spaced apart from the inner wall of the ejection cavity (31). The gas guide surface (61) and the liquid guide surface (62) are respectively provided on both sides of the protrusion.

2. The aerosol valve according to claim 1, characterized in that: The gas guiding surface (61) includes a first arc concave surface facing the air intake structure (4) and a first arc convex surface connected to the first arc concave surface. The liquid guiding surface (62) includes a second arc concave surface facing the liquid intake structure (5) and a second arc convex surface connected to the second arc concave surface.

3. The aerosol valve according to claim 1, characterized in that: The air intake structure (4) includes an air intake hole (41) provided on the side wall of the valve body (2) for compressed gas from the aerosol can to enter, and a gas nozzle (42) provided on the side wall of the valve stem (3) and connecting the air intake hole (41) and the spray chamber (31) when the valve stem (3) slides down.

4. The aerosol valve according to claim 3, characterized in that: The air inlet (41) includes a large air inlet end (411) for compressed gas to enter and a small air inlet end (412) for connecting the large air inlet end (411) and the gas nozzle (42) with a diameter smaller than that of the large air inlet end (411).

5. The aerosol valve according to claim 3, characterized in that: The liquid inlet structure (5) includes a liquid nozzle (52) located on the side wall of the valve stem (3) and connecting the valve chamber (21) and the ejection chamber (31) when the valve stem (3) slides down.

6. The aerosol valve according to claim 5, characterized in that: Both the gas nozzle (42) and the liquid nozzle (52) include an inlet section, an outlet section with a smaller diameter than the inlet section and connected to the ejection chamber (31), and a transition section connected between the inlet section and the outlet section with a diameter that gradually decreases from the inlet section to the outlet section.

7. The aerosol valve according to claim 5, characterized in that: A sealing gasket (8) is installed between the valve body (2) and the sealing cup (1) and is fitted on the valve stem (3). The gas nozzle (42) and the liquid nozzle (52) are located above the sealing gasket (8). When the valve stem (3) slides down, the gas nozzle (42) moves below the sealing gasket (8) and communicates with the air inlet (41), and the liquid nozzle (52) moves below the sealing gasket (8) and communicates with the valve cavity (21). The valve cavity (21) is provided with a spring (9) that can push the valve stem (3) to return to its original position.

8. An aerosol spraying device using the aerosol valve according to any one of claims 1-7, comprising an aerosol can (20) having a can opening and an actuator (30) inserted into the upper end of the valve stem (3) and capable of spraying liquid in a mist, characterized in that: The aerosol can (20) has a raised edge (201) at the mouth, and the sealing cup (1) has a connecting flange (12) that fastens the aerosol valve to the aerosol can (20) by fastening it to the raised edge (201).

Images