Foam shield nozzle

Abstract

The utility model discloses a foam shield sprayer which comprises a liquid inlet section, a foaming cavity and a liquid outlet section which are sequentially connected, a spinning disk is installed in the foaming cavity, the spinning disk extends in a spiral shape, a plurality of through holes are formed in the spinning disk, and at least one part of fluid sprayed into the foaming cavity from the liquid inlet section can impact on the spinning disk; the fluid impacted on the spinning disk can spirally flow towards the liquid outlet section along the spinning disk, so that the fluid in the foaming cavity is spirally disturbed and mixed; through the arrangement of the through holes, the flowing direction of part of fluid can be changed, so that the fluid in different flowing directions collides with one another, bubbles in the fluid can be cut, water and air are mixed more sufficiently, and the foaming rate is further increased.

Description

Technical Field

[0001] The utility model relates to a foam shield, in particular to a foam shield nozzle. Background Art

[0002] Most toilet foam shield nozzles on the market rely on a brush to generate foam, which results in inefficient use of the foam liquid and waste. Some foam shield nozzles use a filter to generate foam. However, over time, the filter can easily develop grooves or accumulate solid impurities, reducing the filter's water flow rate and severely affecting performance and liquid output. Utility Model Content

[0003] The present invention aims to solve at least one of the above-mentioned technical problems in the related art to a certain extent. To this end, the present invention provides a foam shield spray nozzle.

[0004] To achieve the above purpose, the technical solution of the utility model is as follows:

[0005] According to the first aspect of the present invention, the foam shield nozzle includes a liquid inlet section, a foaming chamber and a liquid outlet section connected in sequence. A swirl sheet is installed in the foaming chamber. The swirl sheet extends in a spiral shape and is provided with multiple through holes. At least a portion of the fluid sprayed from the liquid inlet section into the foaming chamber can impact the swirl sheet.

[0006] The foam shield nozzle according to the embodiment of the present invention has at least the following beneficial effects: the fluid impacting the swirl plate can flow in a spiral direction along the swirl plate toward the liquid outlet section, causing spiral disturbance and mixing of the fluid in the foaming chamber; the provision of the through hole can change the flow direction of part of the fluid so that fluids in different flow directions collide with each other, and can also cut the bubbles in the fluid, making the water and gas mixing more complete, thereby further improving the foaming rate.

[0007] According to some embodiments of the present invention, the axial direction of each through hole is parallel to the axis of the swirl plate.

[0008] According to some embodiments of the present invention, the swirl sheet extends spirally around a cylindrical space, the end of the liquid inlet section connected to the foaming chamber is the water outlet end, the maximum inner diameter of the foaming chamber is larger than the inner diameter of the water outlet end, the cylindrical space is located within the axial projection range of the water outlet end, the diameter of the cylindrical space is smaller than the inner diameter of the water outlet end, and the axial projection of the edge of the water outlet end is aligned with the surface of the swirl sheet.

[0009] According to some embodiments of the present invention, the outer edge of the swirl sheet abuts against the inner wall of the foaming cavity, or there is a gap between the outer edge of the swirl sheet and the inner wall of the foaming cavity.

[0010] According to some embodiments of the present invention, a first hole shoulder is formed at the transition position between the liquid outlet section and the foaming cavity, a second hole shoulder is formed at the transition position between the water outlet end and the foaming cavity, and the swirl plate is axially clamped between the first hole shoulder and the second hole shoulder.

[0011] According to some embodiments of the present invention, the inner diameter of the water outlet end is larger than the minimum inner diameter of the liquid outlet section, and the diameter of the cylindrical space is smaller than the minimum inner diameter of the liquid outlet section.

[0012] According to some embodiments of the present invention, a plurality of ribs are provided on the inner wall of one end of the liquid outlet section close to the swirl plate, and the ribs are spaced apart in sequence along the circumference of the liquid outlet section, and at least a portion of the ribs are located on the spiral extension path of the swirl plate.

[0013] According to some embodiments of the present invention, the liquid inlet section includes an incident area and a Venturi channel, the Venturi channel is located between the incident area and the foaming chamber, and the negative pressure area of ​​the Venturi channel is provided with an air suction channel, so that at least a portion of the fluid sprayed from the Venturi channel into the foaming chamber can impact the swirl sheet.

[0014] According to some embodiments of the present invention, the Venturi channel includes a mixing zone, a flow plate, the negative pressure zone and a rectifying zone arranged in sequence along the axial direction, the mixing zone is connected to the incident zone, a plurality of flow holes are provided on the flow plate, the aperture of the flow hole is smaller than the minimum inner diameter of the mixing zone, the aperture of the flow hole is smaller than the minimum inner diameter of the negative pressure zone, the rectifying zone is connected to the foaming chamber, and the end of the rectifying zone close to the foaming chamber is the water outlet end of the Venturi channel.

[0015] According to some embodiments of the present invention, a first liquid inlet and a second liquid inlet are provided on the incident area.

[0016] According to some embodiments of the present invention, the inner diameter of the rectifying zone is smaller than the inner diameter of the negative pressure zone, and the transition position between the rectifying zone and the negative pressure zone is in a constricted shape that gradually shrinks toward the rectifying zone.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 This is a cross-sectional view of the internal structure of the foam shield nozzle;

[0020] Figure 2 This is a cross-sectional view of the internal structure of the foam shield nozzle from another perspective;

[0021] Figure 3 It is a structural diagram of the swirl plate;

[0022] Figure 4 It is a top view of the swirl plate in the axial direction;

[0023] Figure 5 This is a cross-sectional view of the foam shield nozzle along the axial direction.

[0024] Figure numerals: liquid inlet section 100; incident area (101); first liquid inlet 110; second liquid inlet 120; Venturi channel 200; water outlet 201; negative pressure area 210; suction channel 211; mixing area 220; flow plate 230; flow hole 231; rectifying area 240; foaming cavity 300; liquid outlet section 400; rib 410; swirl plate 500; through hole 510; cylindrical space 520; first hole shoulder 601; second hole shoulder 602. DETAILED DESCRIPTION

[0025] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0026] The utility model relates to a foam shield nozzle, which comprises a liquid inlet section 100, a foaming cavity 300 and a liquid outlet section 400.

[0027] like Figure 1 、 Figure 2 and Figure 3As shown, the foam shield nozzle can be assembled from multiple tube sections, with a liquid inlet section 100, a foaming chamber 300, and a liquid outlet section 400 arranged in sequence within the tube. In this embodiment, the liquid inlet section 100, the foaming chamber 300, and the liquid outlet section 400 are coaxially arranged. External water and foaming agent enter the foam shield nozzle through the liquid inlet section 100. The liquid inlet section 100 may include an incident area 101 and a Venturi channel 200. The Venturi channel 200 is connected between the incident area 101 and the foaming chamber 300. The incident area 101 is provided with a first liquid inlet 110 and a second liquid inlet 120. The first liquid inlet 110 is used to connect to an external water supply system, such as tap water. The second liquid inlet 120 is used to connect to a foaming agent box. The mixed liquid of water and foaming agent flows from the incident area 101 to the Venturi channel 200. The Venturi channel 200 can be composed of a conventional entry section, a constricted section, a throat section, and a flared section. The flared section forms a negative pressure zone 210, and an air intake channel 211 is provided on the sidewall of the tube body at the position corresponding to the negative pressure zone 210. When the mixed liquid flows within the Venturi channel 200, a Venturi effect is generated. The negative pressure zone 210 in the Venturi channel 200 draws air from outside the foam shield nozzle into the negative pressure zone 210 through the air intake channel 211. The air and mixed liquid undergo preliminary mixing in the Venturi channel 200 to form a liquid-gas mixture. The foaming agent undergoes preliminary foaming under the action of the water-gas mixture. The fluid is sprayed from the Venturi channel 200 into the foaming chamber 300. A swirl plate 500 is installed in the foaming chamber 300. The swirl plate 500 can be made of metal or plastic and extends in a spiral shape. The axial direction of the swirl plate 500 aligns with the axial direction of the foaming chamber 300. The swirl plate 500 is provided with a plurality of through holes 510, which penetrate the swirl plate 500 in the thickness direction. The fluid in the venturi channel 200 is sprayed toward the foaming chamber 300. After the fluid enters the foaming chamber 300, at least a portion of the fluid can impact the swirl plate 500. The fluid impacting the swirl plate 500 can spirally flow along the swirl plate 500 toward the liquid outlet section 400, causing spiral disturbance and mixing of the fluid in the foaming chamber 300. At the same time, part of the fluid will pass through each through hole 510, and the fluid passing through the through hole 510 will impact the fluid on the side of the swirl plate 500 facing the liquid outlet section 400. The two streams of fluid collide to form foam, and different through holes 510 form different streams of water, causing the fluid to collide multiple times in the foaming chamber 300 and be fully foamed. Through-hole 510 can redirect some of the fluid flow, allowing fluids flowing in different directions to collide with each other. It also cuts bubbles in the fluid, ensuring more complete mixing of water and air, further improving the foaming rate. The foam ultimately flows from foaming chamber 300 into liquid outlet section 400 for discharge and use. The fluid foams efficiently within foaming chamber 300. The resulting foam is not obstructed by the filter screens typically used in conventional technologies when entering liquid outlet section 400 from foaming chamber 300.

[0028] The through holes 510 on the swirl plate 500 can be oriented in different directions. Some through holes 510 can be oriented axially parallel to the swirl plate 500, while others can intersect with the swirl plate 500 at varying angles. This allows the fluid streams to intersect and collide with each other, resulting in more efficient foaming. In this embodiment, the axial directions of the through holes 510 are parallel to the axis of the swirl plate 500. After passing through the through holes 510, the fluid flows in a directional manner, reducing turbulence and ensuring that foam is delivered to the liquid outlet section 400 at a stable rate while maintaining a consistent foaming rate.

[0029] In some specific embodiments of the present invention, Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, the swirl plate 500 extends spirally around a cylindrical space 520, and the cylindrical space 520 forms a passage in the axial direction of the swirl plate 500. One end of the venturi channel 200 connected to the foaming chamber 300 is the water outlet end 201. Among them, the foaming chamber 300 can be a cylindrical cavity with equal diameters at all places, or a conical cavity with varying inner diameters. The water outlet end 201 can be a cylindrical port with equal diameters at all places, or a conical port. The maximum inner diameter of the foaming chamber 300 is greater than the inner diameter of the water outlet end 201. The cylindrical space 520 is located within the axial projection range of the water outlet end 201. Preferably, the cylindrical space 520 and the water outlet end 201 are coaxially arranged. The diameter of the cylindrical space 520 is smaller than the inner diameter of the water outlet end 201, and the axial projection of the edge of the water outlet end 201 is aligned with the surface of the swirl plate 500. Fluid is sprayed into the foaming chamber 300 from the outlet end. Part of the fluid impacts the swirl plate 500, while part directly enters the columnar space 520. Under the spiral flow-guiding action of the swirl plate 500, the fluid flowing through the columnar space 520 also undergoes vortex-like flow. At the same time, because the fluid faces less axial obstruction when flowing through the columnar space 520, the fluid velocity in the columnar space 520 accelerates the foam formed and flows toward the liquid outlet section 400. As the fluid flows along the swirl plate 500, it impacts the inner wall of the foaming chamber 300 under the centrifugal force. Alternatively, a gap of no more than 2 mm exists between the outer edge of the swirl plate 500 and the inner wall of the foaming chamber 300. This gap is preferably less than 2 mm, ensuring that the fluid impacting the inner wall of the foaming chamber 300 continues to flow along the swirl plate 500, mixing and foaming.

[0030] Further, such as Figure 2As shown, a first shoulder 601 is formed at the transition between the liquid outlet section 400 and the foaming chamber 300. A second shoulder 602 is formed at the transition between the water outlet end 201 and the foaming chamber 300. The first shoulder 601 and the second shoulder 602 can be integrally formed within the tube wall, or they can be formed by the ends of different tube sections when they are plugged together. The swirl plate 500 is axially clamped between the first shoulder 601 and the second shoulder 602, thereby securing the swirl plate 500.

[0031] In some specific embodiments of the present invention, Figure 1 As shown, the liquid outlet section 400 can be a cylindrical cavity with a constant diameter at all locations, or it can be a cavity with a varying inner diameter, with the inner diameter of the water outlet end 201 being larger than the minimum inner diameter of the liquid outlet section 400. The diameter of the cylindrical space 520 is smaller than the minimum inner diameter of the liquid outlet section 400. As the fluid flows from the foaming chamber 300 to the liquid outlet section 400, some of the fluid will impact and rebound at the transition point between the foaming chamber 300 and the liquid outlet section 400, further mixing the fluid. After the foam flows from the water outlet end 201 through the foaming chamber 300 and into the liquid outlet section 400, it can be rectified.

[0032] Further, such as Figure 2 As shown, a plurality of ribs 410 are provided on the inner wall of the end of the liquid outlet section 400 near the swirl plate 500. The ribs 410 protrude radially inward from the liquid outlet section 400 and extend in an elongated strip shape along the axial direction of the liquid outlet section 400. The ribs 410 are spaced apart circumferentially around the liquid outlet section 400. At least some of the ribs 410 are located along the spiral extension path of the swirl plate 500. That is, the end of the swirl plate 500 near the liquid outlet section 400 is the downstream end of the swirl plate 500, some of the ribs 410 are located on the downstream side of the swirl plate 500, and at least some of the ribs 410 are located on a virtual spiral line that spirals from the downstream end of the swirl plate 500 toward the liquid outlet section 400. When the fluid spirals along the swirl plate 500 to the transition point between the foaming chamber 300 and the liquid outlet section 400, the fluid impacts the ribs 410, further increasing the foaming rate. A portion of the fluid will also flow out of the swirl plate 500 and hit the inner wall of the tube body where the ribs 410 are located, and then collide with each rib 410 .

[0033] In some embodiments of the present invention, Figure 1 and Figure 2As shown, the venturi channel 200 includes a mixing zone 220, a flow plate 230, the negative pressure zone 210 and a rectifying zone 240 arranged in sequence along the axial direction. The mixing zone 220 is connected to the incident zone 101. The flow plate 230 is provided with a plurality of flow holes 231, and the aperture of the flow holes 231 is smaller than the minimum inner diameter of the mixing zone 220. The aperture of the flow holes 231 is smaller than the minimum inner diameter of the negative pressure zone 210. Water and foaming agent enter the mixing zone 220 for preliminary mixing, and then form a high-speed fluid through the flow holes 231 to enter the negative pressure zone 210. The fluid forms a negative pressure in the negative pressure zone 210 to inhale the external air. The rectifying zone 240 is connected to the foaming chamber 300, and the end of the rectifying zone 240 close to the foaming chamber 300 is the water outlet end 201 of the venturi channel 200. The inner diameter of the rectifying region 240 is smaller than that of the negative pressure region 210. The transition between the rectifying region 240 and the negative pressure region 210 forms a tapered shape that gradually narrows toward the rectifying region 240. After entering the rectifying region 240 from the negative pressure region 210, the fluid undergoes initial rectification before being ejected into the foaming chamber 300 for foaming. Alternatively, the second shoulder 602 may be formed at the transition between the rectifying region 240 and the foaming chamber 300.

[0034] Throughout this specification, references to "some specific embodiments" and the like indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0035] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A foam shield nozzle, characterized by: The invention comprises a liquid inlet section (100), a foaming chamber (300) and a liquid outlet section (400) connected in sequence, wherein a swirl sheet (500) is installed in the foaming chamber (300), the swirl sheet (500) extending in a spiral shape, and a plurality of through holes (510) are provided on the swirl sheet (500), so that at least a portion of the fluid sprayed from the liquid inlet section (100) into the foaming chamber (300) can impact on the swirl sheet (500).

2. The foam shield nozzle according to claim 1, characterized in that: The axial direction of each through hole (510) is parallel to the axis of the swirl plate (500).

3. The foam shield nozzle according to claim 1, characterized in that: The swirl plate (500) spirally extends around a cylindrical space (520); one end of the liquid inlet section (100) connected to the foaming chamber (300) is a water outlet end (201); the maximum inner diameter of the foaming chamber (300) is greater than the inner diameter of the water outlet end (201); the cylindrical space (520) is located within the axial projection range of the water outlet end (201); the diameter of the cylindrical space (520) is smaller than the inner diameter of the water outlet end (201); and the axial projection of the edge of the water outlet end (201) is aligned with the surface of the swirl plate (500).

4. The foam shield nozzle according to claim 1 or 3, characterized in that: The outer edge of the swirl sheet (500) abuts against the inner wall of the foaming cavity (300), or there is a gap of no more than 2 mm between the outer edge of the swirl sheet (500) and the inner wall of the foaming cavity (300).

5. The foam shield nozzle according to claim 3, characterized in that: A first hole shoulder (601) is formed at a transition position between the liquid outlet section (400) and the foaming cavity (300), a second hole shoulder (602) is formed at a transition position between the water outlet end (201) and the foaming cavity (300), and the swirl plate (500) is clamped axially between the first hole shoulder (601) and the second hole shoulder (602).

6. The foam shield nozzle according to claim 3, characterized in that: The inner diameter of the water outlet end (201) is larger than the minimum inner diameter of the liquid outlet section (400), and the diameter of the columnar space (520) is smaller than the minimum inner diameter of the liquid outlet section (400).

7. The foam shield nozzle according to claim 1, characterized in that: A plurality of convex ribs (410) are provided on the inner wall of one end of the liquid outlet section (400) close to the swirl plate (500), and the convex ribs (410) are sequentially spaced along the circumference of the liquid outlet section (400), and at least a portion of the convex ribs (410) are located on the spiral extension path of the swirl plate (500).

8. The foam shield nozzle according to claim 1 or 3, characterized in that: The liquid inlet section (100) comprises an incident area (101) and a Venturi channel (200), wherein the Venturi channel (200) is located between the incident area (101) and the foaming chamber (300), and a suction channel (211) is provided in the negative pressure area (210) of the Venturi channel (200), so that at least a portion of the fluid sprayed from the Venturi channel (200) into the foaming chamber (300) can impact the swirl plate (500).

9. The foam shield nozzle according to claim 8, characterized in that: The Venturi channel (200) comprises a mixing zone (220), a flow plate (230), the negative pressure zone (210) and a rectifying zone (240) arranged in sequence along the axial direction, the mixing zone (220) being connected to the incident zone (101), the flow plate (230) being provided with a plurality of flow holes (231), the aperture of the flow holes (231) being smaller than the minimum inner diameter of the mixing zone (220), the aperture of the flow holes (231) being smaller than the minimum inner diameter of the negative pressure zone (210), the rectifying zone (240) being connected to the foaming chamber (300), and the end of the rectifying zone (240) close to the foaming chamber (300) being the water outlet end (201) of the Venturi channel (200).

10. The foam shield nozzle according to claim 8, characterized in that: A first liquid inlet (110) and a second liquid inlet (120) are provided on the incident area (101).

11. The foam shield nozzle according to claim 9, characterized in that: The inner diameter of the rectifying area (240) is smaller than the inner diameter of the negative pressure area (210), and the transition position between the rectifying area (240) and the negative pressure area (210) is in a constricted shape that gradually shrinks toward the rectifying area (240).

Images