Water outlet device, water appliance and water outlet method

Abstract

A water outlet device, a water appliance, and a water outlet method. The water outlet device comprises a first water outlet portion (1) and a second water outlet portion (2) surrounding the first water outlet portion (1), wherein the first water outlet portion (1) is configured to discharge a first fluid (12), and the second water outlet portion (2) is configured to discharge a plurality of streams of a second fluid (7), the first fluid (12) and the second fluid (7) being distributed on a same water outlet surface (81); and a flow adjustment device (3), which is configured to adjust the flow rate of the second water outlet portion (2) to expand or reduce the projection area of the second fluid (7) centered around the first water outlet portion (1). The water outlet device not only enables free adjustment of spraying effects having different water outlet areas, but also has enhanced flow intensity of water discharged from the central part.

Description

A water outlet device, water-using appliance, and water outlet method Technical Field

[0001] This invention relates to the field of bathroom technology, and in particular to a water outlet device, water-using appliance, and water outlet method. Background Technology

[0002] Existing bathroom products offer different water outlet modes to improve user experience and meet various needs. For example, patent document CN114471978B discloses a "rotating shower head with a rotating cover," which uses a switching mechanism to connect the water inlet channel to the first and second water outlet chambers. When the rotating cover is used, the water flow is more concentrated and the outlet area is smaller, resulting in a stronger water jet effect. When the water outlet panel is used, the water flow is more dispersed and the outlet area is larger, achieving a larger spray area. However, this structure cannot achieve spray effects with different outlet areas or enhance the water flow intensity in the central outlet area.

[0003] Furthermore, patent document CN219280829U describes a water outlet structure with a water splash generator inside the water outlet end. The water splash generator is rotatably mounted on the inner side of the water outlet end of the water outlet structure. The outer circumferential surface of the water splash generator is an outwardly convex arc-shaped surface, while the inner side of the water outlet end is an inwardly concave arc-shaped surface that matches the arc-shaped outer circumferential surface of the water splash generator. An annular rubber seal is provided between the outer circumferential surface of the water splash generator and the inner side of the water outlet end, and the seal is fixed in a limiting groove on the outer circumferential surface of the water splash generator. The water outlet structure has a limiting part located on the water inlet side of the water splash generator. The inner diameter of the limiting part is smaller than the outer diameter of the water splash generator, and the limiting part is used to limit the water splash generator along the axial direction of the water outlet structure. Patent documents CN2806909Y, CN201026468Y, CN201223835Y, CN201949936U, CN202113962U, CN103962253B and CN111263665B disclose valves that adjust the flow rate of a single or multiple water channels by changing the flow area of ​​the water. Technical issues

[0004] The technical problem to be solved by the present invention is to provide a water outlet device that can enhance the intensity of the water flow in the middle of the outlet. Technical solutions

[0005] To solve the above-mentioned technical problems, the first technical solution adopted by the present invention is: a water outlet device, including a first water outlet section and a second water outlet section surrounding the first water outlet section; the first water outlet section is configured to discharge a first fluid; the second water outlet section is configured to discharge multiple streams of second fluid, the first fluid and the second fluid being distributed on the same water outlet surface; and a flow rate regulating device is configured to regulate the flow rate of the second water outlet section, thereby expanding or shrinking the projection area of ​​the second fluid with the first water outlet section as the center.

[0006] To solve the above-mentioned technical problems, the second technical solution adopted by the present invention is: a water discharge method, comprising a third fluid and a fourth fluid; the third fluid forms a first fluid outflow through the water discharge surface; the fourth fluid is split into at least two branch fluids with different flow directions and angles, and after the branch fluids converge, they are constrained to form a second fluid outflow; the first fluid and the second fluid are discharged separately or simultaneously; the second fluid has multiple streams, distributed on the same water discharge surface with the first fluid projection area as the rotational symmetry center; the second fluid can expand or shrink its projection area relative to the first water flow by adjusting the flow rate of at least one of the branch fluids. Beneficial effects

[0007] The beneficial effects of this invention are as follows: Because the flow regulating device can adjust the flow rate of the second water outlet, it allows the second water outlet to expand or shrink the projection area of ​​the second fluid with the first water outlet as the center, thus achieving a spraying effect with freely adjustable water outlet areas. If the first water outlet is also configured to discharge high-pressure water spray, the projection area of ​​the second fluid can be reduced, allowing the second fluid to converge with the first fluid, thereby enhancing the impact effect of the water flow. Attached Figure Description

[0008] Figure 1 is a schematic diagram of the structure of a water outlet device proposed in this invention;

[0009] Figure 2 is an enlarged view of part E of a water outlet device shown in Figure 1;

[0010] Figure 3 is a schematic diagram showing the formation of a second fluid after two branch fluids with different flow rates converge and are constrained.

[0011] Figure 4 is a schematic diagram of the unconstrained state of fluid particles after the two branch fluids converge from an overhead view.

[0012] Figure 5 is a schematic diagram of the discharge chamber of a water outlet device proposed in this invention;

[0013] Figure 6 is a cross-sectional structural diagram of a water outlet device proposed in this invention applied to a pull-out faucet.

[0014] Figure 7 is an enlarged view of part F of the pull-out faucet in Figure 6;

[0015] Figure 8 is a cross-sectional structural diagram of a water outlet device proposed in this invention applied to a pull-out faucet.

[0016] Figure 9 is a cross-sectional structural diagram of a water outlet device proposed in this invention applied to a shower head;

[0017] Figure 10 is a cross-sectional structural diagram of a water outlet device proposed in this invention applied to a sanitary spray gun;

[0018] Figure 11 is an enlarged view of part G of the sanitary spray gun in Figure 10;

[0019] Label Explanation:

[0020] 1. First water outlet; 11. Water surface; 12. First fluid; 13. Third fluid; 2. Second water outlet; 3. Flow regulating device; 4. Flow channel; 5. Cavity; 51. Outlet; 6. Branch fluid; 7. Second fluid; 71. Projection area; 8. Water outlet panel; 81. Water outlet surface;

[0021] 9. Water distribution plate; 91. Baffle plate; 92. Water passage hole; 93. Water flow hole; 10. Fourth fluid. Embodiments of the present invention

[0022] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0023] Referring to Figures 1-11, the present invention provides a water outlet device, comprising a first water outlet section 1 and a second water outlet section 2 surrounding the first water outlet section 1; the first water outlet section 1 is configured to discharge a first fluid 12; the second water outlet section 2 is configured to discharge multiple streams of second fluid 7, the first fluid 12 and the second fluid 7 being distributed on the same water outlet surface 81; and a flow rate regulating device 3 is configured to regulate the flow rate toward the second water outlet section 2, thereby expanding or shrinking the projection area 71 of the second fluid 7 centered on the first water outlet section 1.

[0024] Working principle: The flow regulating device 3 can adjust the flow rate to the second water outlet 2, thereby expanding or shrinking the projection area 71 of the second fluid 7 around the first water outlet 1. The size of the projection area 71 is the size of the spray area formed by the fluid on the surface to be projected (the solid and dashed fluid trajectories in Figure 1 represent the spray angles formed by the second fluid 7 under two different adjustment states), thus achieving free adjustment of the spraying effect of different water outlet areas. If the first water outlet 1 is also configured to discharge high-pressure water spray, the projection area of ​​the second fluid 7 can be reduced to allow the second fluid 7 to converge with the first fluid, thereby enhancing the impact effect of the water flow.

[0025] In some implementations, the following approach can be used to enhance the impact effect of the water flow: the flow regulating device 3 is configured to shut off the water supply to the first water outlet 1, while all the flow is delivered to the second water outlet 2 and adjusted so that all the second fluid 7 is concentrated at a focal point or an axis at the center of the water outlet device. In this way, the pressure of all the fluids can be focused at a point or a line, thereby generating a single powerful water flow.

[0026] In some embodiments, the water outlet device further includes a water outlet panel 8, with the first water outlet section 1 rotatably disposed at the center of the water outlet panel 8. Rotatability means that the first water outlet section 1 can be rotated relative to the water outlet panel 8. Specifically, the first water outlet section 1 has at least two water-passing surfaces 11. When one of the water-passing surfaces of the first water outlet section 1 is used for water outlet, the remaining water-passing surfaces are used for water inlet. By rotating and switching between different water-passing surfaces of the first water outlet section 1 for water outlet, it not only helps to clear the water outlet holes on each water-passing surface of the first water outlet section 1, but also, if the water outlet holes on each water-passing surface of the first water outlet section 1 are different, it is possible to achieve different water spray patterns. For example, each water-passing surface of the first water outlet section 1 can be configured to discharge high-pressure water spray and discharge gentle water spray respectively, thus providing the user with a richer experience.

[0027] Preferably, the first water outlet 1 and the second water outlet 2 are connected to the flow regulating device 3 through independent water channels, so that the flow regulating device 3 can independently control the discharge of the first fluid 12 and the second fluid 7.

[0028] Please refer to Figures 2 to 5. Further, the second water outlet 2 has multiple discharge chambers, each discharge chamber has two flow channels 4 and a cavity 5. The cavity 5 is arranged in the water outlet direction of the flow channel 4. The flow channel 4 and the cavity 5 are arranged in a Y-shape. The outlet 51 of the cavity 5 is distributed on the water outlet panel 8. The flow regulating device 3 is connected to at least one flow channel 4.

[0029] As described above, when two colliding water flows, if one flow is stronger than the other (i.e., has a larger flow rate), the discharge trajectory of the fluid after the collision will tend to follow the original discharge trajectory of the stronger flow, as shown in Figure 3. In Figure 3, the thickness of the arrows representing the strength of the two converging branch fluids 6 indicates their relative strength; the thicker branch fluid 6 is stronger than the thinner branch fluid 6. Therefore, by adjusting the strength of at least one branch fluid 6, the discharge trajectory of the second fluid 7 can be changed, meaning the intersecting flow deviates towards the direction of the stronger flow channel 4. Furthermore, considering that, as shown in Figure 4, when the two branch fluids 6 collide, some fluid will splash out as particles, mainly scattering irregularly to both sides of the water flow direction, a cavity 5 is added to constrain the scattered fluid particles, causing them to re-converge in a specific direction, forming a regular water splash of a specific shape. By using the above principle to adjust the flow rate of the branch fluid 6 in at least one flow channel 4 in each discharge chamber through the flow adjustment device 3, the projection area of ​​the second water outlet 2 can be expanded or reduced with the first water outlet 1 as the center.

[0030] It is worth noting that, referring to Figure 2, the water outlet directions of flow channels 4 form an angle A, where 10° ≤ A ≤ 100°. If the angle between flow channels 4 is larger, the collision between the two water streams is greater, resulting in more dispersed and scattered fluid particles. Consequently, the discharged water stream will have many dispersed fluid particles around it, making the visual outline of the discharged water stream appear blurry. Conversely, if the angle between flow channels 4 is smaller, the collision between the two water streams is lower, resulting in fewer and more concentrated dispersed fluid particles and a clearer water stream outline. However, a smaller angle leads to less noticeable changes in the fluid discharge trajectory. As described above, by limiting the angle between the water outlet directions of flow channels 4, both the fluid discharge pattern and the range of discharge angles can be considered. The preferred range for the angle A of the water outlet directions of flow channels 4 can be further configured as 65° ≤ A ≤ 75°.

[0031] It should be noted that, referring to Figure 2, with the central axis of the cavity 5 as the reference, the two flow channels 4 can be symmetrically arranged on both sides of the central axis of the cavity 5. For example, the water outlet direction of one flow channel 4 forms an angle B with the central axis of the cavity 5, and the water outlet direction of the other flow channel 4 forms an angle C with the central axis of the cavity 5. Angle B is equal to angle C, and angle B plus angle C equals angle A. Alternatively, the two flow channels 4 can be asymmetrically arranged on both sides of the central axis of the cavity 5. For example, the water outlet direction of one flow channel 4 forms an angle B with the central axis of the cavity 5, and the water outlet direction of the other flow channel 4 forms an angle C with the central axis of the cavity 5. Angle B is not equal to angle C, and angle B plus angle C equals angle A.

[0032] In some embodiments, the inlet flow area to the outlet flow area of ​​the flow channel 4 is equal, or the inlet flow area to the outlet flow area of ​​the flow channel 4 gradually decreases. If the inlet flow area to the outlet flow area of ​​the flow channel 4 is equal, it can ensure relative stability when the two streams of water collide. If the inlet flow area to the outlet flow area of ​​the flow channel 4 gradually decreases, the flow channel 4 has the effect of increasing water pressure, which can enhance the impact effect when the two streams of water collide.

[0033] Preferably, the ratio of the inlet flow area to the outlet flow area of ​​the flow channel 4 is X, where 1 ≤ X ≤ 2. The inlet flow area of ​​the flow channel 4 is limited to no more than twice the outlet flow area to avoid generating more fluid particles when the two streams collide, thus ensuring the effective formation of water splashes with clear flow outlines.

[0034] In some embodiments, as shown in Figure 2, the flow length of the cavity 5 is S, where 0.5mm ≤ S ≤ 2mm. If the flow length of the cavity 5 is too short, it is insufficient to gather a sufficient amount of fluid particles to form regular water droplets with a specific shape. Conversely, if the flow length is too long, it will limit the angle range of the gathered water flow to be discharged outward. Therefore, the flow length of the cavity 5 is limited to meet the forming effect after the fluid is discharged.

[0035] In some embodiments, the cavity 5 is preferably rectangular, elliptical, or trapezoidal in shape. Specifically, the aspect ratio of the cross-section of the rectangular or trapezoidal cavity 5 in the water-flow direction is 2 to 3:1. Preferably, the width of the cavity 5 is D, 0.3 mm ≤ D ≤ 2 mm. The aspect ratio of the major and minor axes of the cross-section of the elliptical cylinder 5 in the water-flow direction is 2 to 3:1. Preferably, the minor axis of the cavity 5 is D, 0.3 mm ≤ D ≤ 2 mm. Defining the width of the cavity 5 not only ensures the flow of the second fluid 7 but also ensures the effective collection of dispersed splashed fluid particles.

[0036] It should be noted that the flow regulating device 3 can be a valve commonly used in the art to regulate the flow of a single or multiple water channels by changing the water flow area, or it can be an external water pump that directly regulates the flow by changing the pump power.

[0037] In some embodiments, if the water outlet panel 8 is roughly circular, the outlets of the plurality of cavities 5 are symmetrically radially distributed on the water outlet panel with the first water outlet section 1 as the center. The plurality of cavity outlets 5 are radially distributed symmetrically on the roughly circular water outlet panel so that the water outlet area formed by the multiple streams of second fluid 7 is roughly conical or cylindrical.

[0038] In some embodiments, if the water outlet panel 8 is rectangular, the outlets of the multiple cavities 5 are axially symmetrically distributed on the water outlet panel 8, so that the water outlet area formed by the multiple streams of second fluid 7 is trapezoidal or rectangular.

[0039] Preferably, the ratio of the area occupied by the first water outlet 1 on the water outlet panel 8 to the area occupied by the second water outlet 2 on the water outlet panel 8 is 1:40 to 1:50.

[0040] A water discharge method includes a third fluid 13 and a fourth fluid 10; the third fluid 13 flows out as a first fluid 12 through an outlet surface 81; the fourth fluid 10 is split into at least two branch fluids 6 with different flow directions and angles, and after the branch fluids 6 converge, they are constrained to form a second fluid 7 that flows out; the first fluid and the second fluid 7 are discharged separately or simultaneously; the second fluid 7 has multiple streams, distributed on the same outlet surface 81 with the projection area of ​​the first fluid as the center of rotational symmetry; the second fluid 7 can expand or shrink its projection area relative to the first water flow by adjusting the flow rate of at least one branch fluid 6.

[0041] Furthermore, the projection area of ​​the multiple streams of the second fluid 7 is in the shape of a hollow cone.

[0042] Example 1

[0043] Referring to Figures 6 and 7, a pull-out faucet includes a housing and a water outlet device. The water outlet of the housing is fitted with a water outlet panel 8. A second water outlet 2 is located at the edge of the water outlet panel 8. The second water outlet 2 has multiple discharge chambers located on the water outlet panel 8. A water distribution plate 9 has partitions 91 and water passage holes 92 equal in number to the number of discharge chambers, as well as at least one water passage hole 93 for conveying fluid to the cavity between the water distribution plate 9 and the water outlet panel 8. The partitions 91 and the water passage holes 92 are arranged adjacent to each other, and the partitions 91 are located on the drainage surface of the water distribution plate 9.

[0044] The water distribution plate 9 is mounted on the water-facing surface of the water outlet panel 8. The partition plate 91 is embedded in the discharge chamber to separate the discharge chamber, forming two flow channels 4 and a cavity 5 on the water outlet side of the flow channels 4. The two flow channels 4 and the cavity 5 are arranged in a Y-shape. The water distribution plate 9 divides the water flow into two water paths. The water passage hole 92 guides the water flow through one of the flow channels 4 and directly into the cavity 5 of all discharge chambers. The water passage hole 93 guides the water flow to pass through the water distribution plate 9 and then into the cavity between the water distribution plate 9 and the water outlet panel 8. Then, from this cavity, it enters the cavity 5 of all discharge chambers through the other flow channel 4. In this way, the two water paths can independently supply water to the two flow channels 4 of each discharge chamber.

[0045] It also includes a flow regulating device 3, which has a valve core located inside the housing cavity and a push button slidably disposed outside the housing. The push button is connected to the regulating end of the valve core. By controlling the opening of the valve core with the push button, the flow regulating device 3 can regulate the flow rate of any one of the water channels after diversion, so that the two water streams collide with each other and are rectified by the cavity 5 to be discharged to the outside at a specific angle.

[0046] The first water outlet 1 is located in the middle of the water outlet panel 8. The water-facing side of the first water outlet 1 is independently connected to the valve core, so that whether the first water outlet 1 is flowing with water and the amount of water flow can be independently controlled by the valve core.

[0047] Please refer to Figure 8. Another type of pull-out faucet, different from the pull-out faucets shown in Figures 6 and 7, has a flow regulating device 3 with a knob rotatably mounted outside the housing. The knob is connected to the regulating end of the valve core, thereby driving the valve core to control the water flow variation mode of the pull-out faucet.

[0048] Example 2

[0049] Please refer to Figures 1 and 9. A shower head includes a shower head, a handle, and a water outlet device. The water outlet of the shower head is embedded in a water outlet panel 8. A second water outlet 2 is located at the edge of the water outlet panel 8. The second water outlet 2 has multiple discharge chambers located on the water outlet panel 8. A water distribution plate 9 has partitions 91 and water passage holes 92 equal in number to the number of discharge chambers. The partitions 91 and water passage holes 92 are arranged adjacent to each other. The partitions 91 are located on the drainage surface of the water distribution plate 9.

[0050] The water distribution plate 9 is assembled on the water-facing surface of the water outlet panel 8. The partition plate 91 is embedded in the discharge chamber to separate the discharge chamber, forming two flow channels 4 and a cavity 5 on the water outlet side of the flow channels 4. The two flow channels 4 and the cavity 5 are arranged in a Y-shape. The water distribution plate 9 divides the water flow into two water paths. The water passage hole 92 guides the water flow through one of the flow channels 4 into the cavity 5 of all discharge chambers. The cavity between the water distribution plate 9 and the water outlet panel 8 guides the water flow through the other flow channel 4 into the cavity 5 of all discharge chambers. In this way, the two water paths can independently supply water to the two flow channels 4 of each discharge chamber.

[0051] It also includes a flow regulating device 3, which has a valve core located inside the handle and an operating part located outside the handle. The operating part can be configured as a button, push knob, or knob, etc. The operating part is connected to the regulating end of the valve core. The valve core is configured to supply water independently to the water-facing surface of the water divider 9 and the cavity between the water divider 9 and the outlet panel 8. In this way, by controlling the opening of the valve core through the operating part, the flow regulating device 3 can regulate the flow of any one of the water paths after diversion, so that the two water streams collide with each other and are rectified by the cavity 5 to produce a specific angle for discharge to the outside.

[0052] The first water outlet 1 is located in the middle of the water outlet panel 8. The water-facing side of the first water outlet 1 is independently connected to the valve core, so that whether the first water outlet 1 is flowing with water and the amount of water flow can be independently controlled by the valve core.

[0053] Example 3

[0054] Sanitary showerheads are typically used with showerheads in bathrooms or toilets, and can also be used for car washing.

[0055] Please refer to Figures 10 and 11. A sanitary sprinkler head includes a housing and a water outlet device. The water outlet of the housing is embedded with a water outlet panel 8. A second water outlet 2 is disposed at the edge of the water outlet panel 8. The second water outlet 2 has multiple discharge chambers located on the water outlet panel 8. A water distribution plate 9 is provided with partitions 91 and water passage holes 92, which are equal in number to the number of discharge chambers. The partitions 91 and water passage holes 92 are arranged adjacent to each other and the partitions 91 are located on the drainage surface of the water distribution plate 9.

[0056] The water divider plate 9 is mounted on the water-facing surface of the water outlet panel 8. The partition plate 91 is embedded in the discharge chamber to separate the discharge chamber, forming two flow channels 4 and a cavity 5 on the water outlet side of the flow channels 4. The two flow channels 4 and the cavity 5 are arranged in a Y-shape. The water divider plate 9 divides the water flow into two water paths. The water passage guides the water flow through one of the flow channels 4 into the cavity 5 of all discharge chambers. The cavity between the water divider plate 9 and the water outlet panel 8 guides the water flow through the other flow channel 4 into the cavity 5 of all discharge chambers. In this way, the two water paths can independently supply water to the two flow channels 4 of each discharge chamber.

[0057] It also includes a flow regulating device 3 for regulating the flow rate of at least one water path after diversion; the flow regulating device 3 has a valve core located in the inner cavity of the housing, and the flow regulating device 3 has an operating part slidably disposed outside the housing, the operating part being drivenly connected to the regulating end of the valve core.

[0058] The first water outlet 1 is located in the middle of the water outlet panel 8. The water-facing side of the first water outlet 1 is independently connected to the valve core, so that whether the first water outlet 1 is flowing with water and the amount of water flow can be independently controlled by the valve core.

[0059] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A water outlet device, characterized in that: It includes a first water outlet and a second water outlet surrounding the first water outlet; The first water outlet is configured to discharge a first fluid; The second water outlet is configured to discharge multiple streams of second fluid, with the first fluid and the second fluid distributed on the same water outlet surface; It has a flow regulating device configured to regulate the flow rate of the second water outlet, thereby expanding or shrinking the projection area of ​​the second fluid with the first water outlet as the center.

2. The water outlet device according to claim 1, characterized in that... It also includes a water outlet panel, wherein the first water outlet is rotatably disposed in the middle position of the water outlet panel.

3. The water outlet device according to claim 2, characterized in that: The first water outlet has at least two water-passing surfaces. When one of the water-passing surfaces of the first water outlet is used for water discharge, the remaining water-passing surfaces of the first water outlet are used for water intake.

4. The water outlet device according to claim 2, characterized in that: The ratio of the area occupied by the first water outlet section to the area occupied by the second water outlet section on the water outlet panel is 1:40 to 1:

50.

5. The water outlet device according to claim 2, characterized in that: The second water outlet has multiple discharge chambers, each discharge chamber including two flow channels and a cavity. The cavity is located in the water outlet direction of the flow channels, and the flow channels and the cavity are arranged in a Y-shape. The outlet of the cavity is distributed on the water outlet panel. The flow regulating device is connected to at least one of the flow channels.

6. The water outlet device according to claim 5, characterized in that: The outlets of the multiple cavities are symmetrically radially distributed on the water outlet panel with the first water outlet as the center.

7. The water outlet device according to claim 1, characterized in that: The first water outlet and the second water outlet are respectively connected to the flow regulating device through independent water channels.

8. A water-using appliance, characterized in that: Includes the water outlet device according to any one of claims 1-7, wherein the water-using appliance is a pull-out faucet, a shower head, or a sanitary spray gun.

9. A method for discharging water, characterized in that: It has a third fluid and a fourth fluid; The third fluid flows out as the first fluid through the water outlet surface; The fourth fluid is split into at least two branch fluids with different flow angles. After the branch fluids converge, they are constrained to form a second fluid that flows out. The first fluid and the second fluid may be discharged separately or simultaneously; The second fluid has multiple streams, distributed on the water outlet surface with the projection area of ​​the first fluid as the center of rotational symmetry; The second fluid can expand or shrink the projection area relative to the first fluid by adjusting the flow rate of at least one of the branch fluids.

10. The water effluent method according to claim 9, characterized in that: The projection area of ​​the multiple streams of the second fluid is in the shape of a hollow cone.

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