Foam sprayer having pressure relief and explosion prevention functions

Abstract

A foam sprayer having pressure relief and explosion prevention functions. The foam sprayer comprises a bottle body (1) having a containing cavity (3), a lid body (2) detachably provided above the bottle body (1) by means of a locking structure and used for closing the containing cavity (3), a spraying assembly (4) for spraying liquid in the containing cavity (3) out of the bottle body (1), an air pumping assembly (5) for pumping air into the containing cavity (3), and a power assembly (6) for providing operation power for the air pumping assembly (5). A placement cavity (7) is formed in the lid body (2); the spraying assembly (4) and the air pumping assembly (5) are partially provided in the placement cavity (7); the foam sprayer further comprises a pressure relief assembly provided on the lid body (2) or the bottle body (1); and the pressure relief assembly can discharge excess gas in the containing cavity (3) to the outside.

Description

A foam sprayer with pressure relief and explosion-proof functions Technical Field

[0001] The utility model belongs to the technical field of cleaning tools and relates to a foam sprayer with pressure relief and explosion-proof functions. Background Art

[0002] A sprayer is a device that uses suction to convert liquids or other liquids into mist and sprays them evenly onto other objects. Existing sprayers spray liquids in a mist-like form. Due to their large spray area, sprayers can be applied to cleaning applications. The working principle of a sprayer can be described in prior art documents such as application number "202120485519.9," patent title "A Dual-Purpose Foam Sprayer," and application number "201920075697.7," patent title "An Electric Foam Sprayer."

[0003] In the prior art, when the sprayer is overfilled with gas, a large difference in air pressure between the inside and outside of the sprayer may occur. At this time, the air pressure inside the sprayer is very high, so there is a risk of the sprayer exploding.

[0004] Utility Model Content

[0005] The utility model aims to solve the problem that the existing foam sprayers have the risk of explosion when the air pressure in the inner cavity is too high, and proposes a foam sprayer with pressure relief and explosion-proof functions.

[0006] The purpose of this utility model can be achieved through the following technical solutions:

[0007] A foam sprayer with a pressure relief and explosion-proof function is characterized in that it includes a bottle body with a cavity, a cover body that is detachably arranged above the bottle body through a locking structure and seals the cavity, a spray assembly for spraying the liquid in the cavity from the bottle body, an air pump assembly for pumping air into the cavity, and a power assembly for providing power for the air pump assembly to operate. The bottle cap has an accommodation cavity, and the spray assembly and the air pump assembly are partially arranged in the accommodation cavity. The sprayer also includes a pressure relief assembly arranged on the cover body or the bottle body, and the pressure relief assembly can discharge excess gas in the cavity to the outside.

[0008] In the above-mentioned foam sprayer with pressure relief and explosion-proof functions, the bottom surface of the bottle cap is provided with an annular column extending downward, and the locking structure is arranged on the annular column. The bottom surface of the bottle cap is also provided with an annular surface body vertically. When the bottle cap is placed on the bottle body, a closed space is formed between the annular surface body and the cavity. The placement cavity in the upper part of the annular surface body of the bottle cap is connected to the outside world. The center of the annular surface body is recessed downward to provide a stepped notch, and the air pump assembly is partially arranged in the stepped notch.

[0009] In the above-mentioned foam sprayer with pressure relief and explosion-proof functions, a movable opening is opened on the outside of the bottle body, and the pressure relief assembly includes a button member slidably arranged in the movable opening and partially exposed to the outside and a bracket member fixedly arranged in the bottle body. A sealing ring is provided inside the button member, and an elastic member is provided between the bracket member and the button member. The elastic member makes the button member tend to bounce toward the outside of the bottle body when not subject to external force. When the button member bounces toward the outside of the bottle body, the sealing ring fits against the edge of the movable opening to seal the cavity.

[0010] In the above-mentioned foam sprayer with pressure relief and explosion-proof functions, a movable opening is provided on the outer side of the cover body, and a pressure relief port is provided on the annular surface body. The pressure relief assembly includes a button member slidably arranged in the movable opening and partially exposed to the outside, a pressure relief rod slidably arranged on the pressure relief port, and a bracket member fixedly arranged on the cover body. A sealing ring is provided at the bottom end of the pressure relief rod, and an elastic member is provided between the bracket member and the pressure relief rod. The elastic member makes the pressure relief rod tend to bounce upward toward the pressure relief port when not subject to external force. When the pressure relief rod bounces upward, the sealing ring fits with the edge of the pressure relief port to seal the cavity. The top of the pressure relief rod has a dome, and the inner end of the button member is provided with a bevel. After the button member moves inward, its bevel contacts the dome, causing the pressure relief rod to move downward.

[0011] In the above-mentioned foam sprayer with pressure relief and explosion-proof functions, a pressure relief port is provided on the annular surface body, and the pressure relief assembly includes a pressure relief rod slidably arranged on the pressure relief port and a bracket member fixedly arranged on the cover body. A sealing ring is provided at the bottom end of the pressure relief rod, and the cavity is closed when the sealing ring is in contact with the pressure relief port. A sensor for detecting the air pressure in the cavity is provided at the bottom of the annular surface body, and a linear drive member is also provided on the bracket member. The linear drive member is used to drive the lifting movement of the pressure relief rod in the pressure relief port, and the sensor is electrically connected to the linear drive member.

[0012] In the above-mentioned foam sprayer with pressure relief and explosion-proof function, the linear drive component is one of a micro motor and screw assembly, a micro motor and gear rack assembly, and a micro cylinder assembly.

[0013] In the above-mentioned foam sprayer with pressure relief and explosion-proof functions, the locking structure is a threaded locking structure.

[0014] In the above-mentioned foam sprayer with pressure relief and explosion-proof functions, the cover body is provided with a handle for hand-holding.

[0015] In the above-mentioned foam sprayer with pressure relief and explosion-proof function, the bottle body is provided with a plurality of raised ribs for enhancing the function.

[0016] In the above-mentioned foam sprayer with pressure relief and explosion-proof function, the cover body is provided with a pressing rod for starting and stopping the power component.

[0017] Compared with the prior art, the present sprayer can immediately release the gas in the chamber when the pressure is too high, thereby avoiding the risk of explosion caused by continuous injection of pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG1 is a schematic structural diagram of the sprayer;

[0019] FIG2 is a schematic sectional view of the side structure of the sprayer;

[0020] FIG3 is a schematic cross-sectional view of the forward structure of the sprayer;

[0021] In the figure, 1. bottle body; 2. cover body; 3. container cavity; 4. spray assembly; 5. air pump assembly; 6. power assembly; 7. placement cavity; 8. annular cylinder; 9. annular surface; 10. stepped notch; 11. button; 12. pressure relief rod; 13. sealing ring; 14. dome; 15. inclined surface; 16. handle; 17. raised rib; 18. pressing rod. DETAILED DESCRIPTION

[0022] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0023] As shown in Figures 1 to 3, the foam sprayer with pressure relief and explosion-proof functions includes a bottle body 1 with a cavity 3, a cover body 2 that is detachably arranged above the bottle body 1 through a locking structure and seals the cavity 3, a spray assembly 4 for spraying the liquid in the cavity 3 from the bottle body 1, an air pump assembly 5 for pumping air into the cavity 3, and a power assembly 6 for providing power for the air pump assembly 5. The bottle cap has an accommodation cavity 7, and the spray assembly 4 and the air pump assembly 5 are partially arranged in the accommodation cavity 7. The sprayer also includes a pressure relief assembly arranged on the cover body 2 or the bottle body 1, which can discharge excess gas in the cavity 3 to the outside.

[0024] As shown in Figures 2 and 3, the bottom surface of the bottle cap extends downward (downward refers to the direction in which the foam sprayer is placed on a plane and is upright downward) and is provided with an annular column 8. The locking structure is provided on the annular column 8. The bottom surface of the bottle cap is also vertically provided with an annular surface body 9. When the bottle cap is placed on the bottle body 1, a closed space is formed between the annular surface body 9 and the cavity 3. The placement cavity 7 in the upper part of the annular surface body 9 of the bottle cap is connected to the outside world. The center of the annular surface body 9 is recessed downward and provided with a stepped notch 10. Part of the air pump assembly 5 is disposed in the stepped notch 10.

[0025] The spray assembly 4, the air pump assembly 5, and the air pump assembly 5 have been fully explained in the prior art (document recorded with application number "201920075697.7" and named "An Electric Foam Sprayer"), so this application document will not elaborate on them.

[0026] An important design element of this application document is the design of the pressure relief assembly, which has three forms.

[0027] The first is to design directly on the bottle 1:

[0028] A movable opening is provided on the outside of the bottle body 1. The pressure relief assembly includes a button member 11 slidably arranged in the movable opening and partially exposed to the outside, and a bracket member fixedly arranged in the bottle body 1. A sealing ring 13 is provided inside the button member 11, and an elastic member is provided between the bracket member and the button member 11. The elastic member makes the button member 11 tend to bounce outward from the bottle body 1 when no external force is applied. When the button member 11 bounces outward from the bottle body 1, the sealing ring 13 fits against the edge of the movable opening to seal the cavity 3.

[0029] As long as the button 11 is pressed inwardly, the sealing ring 13 will leave the edge of the movable opening along with the button 11, allowing the gas in the bottle to be discharged through the movable opening, thereby achieving a pressure relief effect.

[0030] The second method is to design on the bottle cap. Because the bottle cap and the bottle body 1 form a closed space, the annular surface 9 is required to realize it. Therefore, the hole can only be made on the annular surface 9. The following manual pressure relief method is used:

[0031] As shown in Figure 2, a movable opening is provided on the outer side of the cover body 2, and a pressure relief opening is provided on the annular surface body 9. The pressure relief assembly includes a button member 11 slidably arranged in the movable opening and partially exposed on the outside, a pressure relief rod 12 slidably arranged on the pressure relief opening, and a bracket member fixedly arranged on the cover body 2. A sealing ring 13 is provided at the bottom end of the pressure relief rod 12, and an elastic member is provided between the bracket member and the pressure relief rod 12. The elastic member makes the pressure relief rod 12 tend to bounce above the pressure relief opening when not subject to external force. When the pressure relief rod 12 bounces upward, the sealing ring 13 fits with the edge of the pressure relief opening to seal the cavity 3. The top of the pressure relief rod 12 has a dome 14, and the inner end of the button member 11 is provided with a bevel 15. After the button member 11 moves inward, its bevel 15 contacts the dome 14, causing the pressure relief rod 12 to move downward.

[0032] After pressing the button 11, the inclined surface 15 of the button 11 squeezes the dome 14, causing the pressure relief rod 12 to move downward. After the pressure relief rod 12 moves, its sealing ring 13 will separate from the pressure relief port, allowing the gas in the bottle to be discharged from the pressure relief port of the bottle cap and connected to the outside world from the upper part of the annular surface 9.

[0033] The third method is to design the bottle cap and use the self-controlled pressure relief method:

[0034] In the above-mentioned foam sprayer with pressure relief and explosion-proof functions, a pressure relief port is provided on the annular surface body 9, and the pressure relief assembly includes a pressure relief rod 12 slidably arranged on the pressure relief port and a bracket member fixedly arranged on the cover body 2. The bottom end of the pressure relief rod 12 is provided with a sealing ring 13. When the sealing ring 13 is in contact with the pressure relief port, the cavity 3 is closed. A sensor for detecting the air pressure in the cavity 3 is provided at the bottom of the annular surface body 9, and a linear drive member is also provided on the bracket member. The linear drive member is used to drive the lifting movement of the pressure relief rod 12 in the pressure relief port, and the sensor is electrically connected to the linear drive member.

[0035] With the pressure sensor, the pressure in the bottle can be automatically detected. When the air pressure is too high, the linear drive component drives the pressure relief rod 12 to move, separating the sealing ring 13 from the pressure relief port to open the pressure relief port and complete the pressure relief function.

[0036] The linear drive component is one of a micro motor and screw assembly, a micro motor and gear rack assembly, and a micro cylinder assembly.

[0037] Specifically: any component that can achieve the linear drive function can be used. The micro motor and screw assembly is a small motor that works with the screw slider to achieve the lifting and lowering movement of the pressure relief rod 12; the micro motor and gear rack assembly is a small motor that works with the gear and gear, and the rack is placed on the pressure relief rod 12 to achieve the lifting and lowering movement of the pressure relief rod 12; the micro cylinder assembly is a micro cylinder that connects the piston rod end of the micro cylinder to the pressure relief rod 12 to achieve the lifting and lowering movement of the pressure relief rod 12

[0038] The locking structure is a thread locking structure.

[0039] Specifically: the top of the cavity 3 of the bottle body 1 is an upper opening, the outer circle of the upper opening of the bottle body 1 is provided with an external thread, and the inner circle of the cover body 2 / annular cylinder 8 has an internal thread, and the bottle body 1 and the cover body 2 are locked to each other by tightening the external thread and the internal thread.

[0040] In addition, the cover body 2 is provided with a handle 16 for holding, the bottle body 1 is provided with a plurality of raised ribs 17 for enhancing the function, and the cover body 2 is provided with a pressing rod 18 for starting and stopping the power assembly 6.

[0041] It should be understood that in the claims and description of the present utility model, all "including..." should be understood as open-ended, that is, its meaning is equivalent to "at least containing...", and should not be understood as closed-ended, that is, its meaning should not be understood as "only including...".

[0042] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. A foam sprayer with pressure relief and explosion-proof function, characterized in that: The sprayer comprises a bottle body with a cavity, a cover body which is detachably arranged on the bottle body through a locking structure and closes the cavity, a spray assembly for spraying the liquid in the cavity from the bottle body, an air pump assembly for pumping air into the cavity, and a power assembly for providing power for the air pump assembly to operate. The bottle cap has an accommodating cavity, and the spray assembly and the air pump assembly are partially arranged in the accommodating cavity. The sprayer also comprises a pressure relief assembly arranged on the cover body or the bottle body, and the pressure relief assembly can discharge the excessive gas in the cavity to the outside.

2. A foam sprayer with pressure relief and explosion-proof function according to claim 1, characterized in that: The bottom surface of the bottle cap is provided with an annular cylinder extending downward, and the locking structure is arranged on the annular cylinder. The bottom surface of the bottle cap is also provided with an annular surface body vertically. When the bottle cap is arranged on the bottle body, a closed space is formed between the annular surface body and the cavity. The placement cavity on the upper part of the annular surface body of the bottle cap is connected with the outside world. The center of the annular surface body is recessed downward and provided with a stepped notch, and the air pump assembly is partially arranged in the stepped notch.

3. The foam sprayer with pressure relief and explosion-proof function according to claim 1, characterized in that: A movable opening is provided on the outer side of the bottle body, and the pressure relief assembly includes a button component slidably arranged in the movable opening and partially exposed on the outer side, and a bracket component fixedly arranged in the bottle body. A sealing ring is provided inside the button component, and an elastic component is provided between the bracket component and the button component. The elastic component enables the button component to have a tendency to bounce out of the bottle body when no external force is applied. When the button component bounces out of the bottle body, the sealing ring fits against the edge of the movable opening to seal the cavity.

4. The foam sprayer with pressure relief and explosion-proof function according to claim 2, characterized in that: A movable opening is provided on the outer side of the cover body, and a pressure relief opening is provided on the annular surface body. The pressure relief assembly includes a button member slidably arranged in the movable opening and partially exposed on the outer side, a pressure relief rod slidably arranged on the pressure relief opening, and a bracket member fixedly arranged on the cover body. A sealing ring is provided at the bottom end of the pressure relief rod, and an elastic member is provided between the bracket member and the pressure relief rod. The elastic member enables the pressure relief rod to have a tendency to bounce upward toward the pressure relief opening when no external force is applied. When the pressure relief rod bounces upward, the sealing ring fits against the edge of the pressure relief opening to seal the cavity. The top end of the pressure relief rod has a dome, and the inner end of the button member is provided with a beveled body. After the button member moves inward, its beveled body contacts the dome to move the pressure relief rod downward.

5. The foam sprayer with pressure relief and explosion-proof function according to claim 2, characterized in that: A pressure relief port is provided on the annular surface body, and the pressure relief assembly includes a pressure relief rod slidably arranged on the pressure relief port and a bracket member fixedly arranged on the cover body. A sealing ring is provided at the bottom end of the pressure relief rod, and the cavity is closed when the sealing ring is in contact with the pressure relief port. A sensor for detecting the air pressure in the cavity is provided at the bottom of the annular surface body, and a linear driving member is also provided on the bracket member. The linear driving member is used to drive the lifting movement of the pressure relief rod in the pressure relief port, and the sensor is electrically connected to the linear driving member.

6. The foam sprayer with pressure relief and explosion-proof function according to claim 5, characterized in that: The linear drive component is one of a micro motor and screw assembly, a micro motor and gear rack assembly, and a micro cylinder assembly.

7. A foam sprayer with pressure relief and explosion-proof function according to any one of claims 1 to 6, characterized in that: The locking structure is a thread locking structure.

8. A foam sprayer with pressure relief and explosion-proof function according to any one of claims 1 to 6, characterized in that: The cover body is provided with a handle for hand-holding.

9. A foam sprayer with pressure relief and explosion-proof function according to any one of claims 1 to 6, characterized in that: The bottle body is provided with a plurality of raised ribs for enhancing the function.

10. A foam sprayer with pressure relief and explosion-proof function according to any one of claims 1 to 6, characterized in that: The cover body is provided with a pressing rod for starting and stopping the power assembly.

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