JP6699072B2 - Water discharge device - Google Patents

Description

  The present invention relates to a water discharge device that discharges hot water while reciprocally vibrating it.

  The following Patent Documents 1 to 3 describe water discharge devices that utilize an oscillation phenomenon by a fluid element. According to these water discharge devices, since the jet direction of the water discharge can be changed without providing a movable member, there is an advantage that a water discharge device capable of discharging water in a wide range can be realized with a simple and compact structure.

  In the water discharge device described in Patent Document 3 below, as shown in FIG. 10, first, the fluid that has flowed into the front chamber 110 through the inlet hole 114 has an obstruction 116 of triangular cross section that is provided in the front chamber 110 in an island shape. Clash with. When the fluid collides, Karman vortices are alternately generated on the upper side and the lower side of the obstacle 116 on the downstream side of the obstacle 116 to form a vortex row. The vortex street of this Karman vortex reaches the outlet 112 while growing. In the vicinity of the outlet 112, the flow velocity on the side where the vortex in the vortex array is present is high, and the flow velocity on the opposite side is low. In the example shown in FIG. 10, Karman vortices are alternately generated on the upper side and the lower side of the obstacle 116, and the vortex train sequentially reaches the outlet 112. Therefore, in the vicinity of the outlet 112, the upper flow velocity is high. The lower flow velocity appears alternately. When the flow velocity on the upper side is high, the fluid having a high flow velocity collides with the wall surface 110a on the upper side of the outlet 112 to change its direction, and the fluid ejected from the outlet 112 becomes a jet flow directed obliquely downward. On the other hand, when the flow velocity on the lower side is high, the fluid having a high flow velocity collides with the wall surface 110b on the lower side of the outlet 112, and a jet flow obliquely upward is ejected from the outlet 112. By repeating such a state alternately, the jet flow from the outlet 112 is jetted while reciprocally vibrating. According to this type of water discharger, it is possible to realize a water discharger capable of discharging water in a wide range with an extremely simple and compact structure.

JP 2000-120141 A JP, 2004-275985, A Japanese Patent Publication No. 58-49300

However, in the water spouting device of the method described in Patent Document 3, when the flow rate adjusting means is provided on the upstream side and the flow rate is changed by this flow rate adjusting means, the instantaneous flow rate of the fluid flowing into the water spouting device Will change. That is, the instantaneous flow rate of the fluid that collides with the obstacle 116 changes, and the velocity of the fluid that passes through both sides of the obstacle 116 changes.

When the velocity of the fluid changes, the cycle of the generated Karman vortices changes, which affects the cycle of reciprocating motion. In other words, the reciprocating motion is not intended by the designer, and the desired vibration water discharge cannot be performed. Especially when the instantaneous flow rate increases and the Karman vortex generation period becomes shorter, water droplets near the turn-back end of the reciprocating motion come into contact with each other and become coupled, resulting in an uneven discharge of water. There is a risk of adverse effects.

The present invention has been made in view of such a problem, and an object thereof is to provide a water discharge device capable of suppressing a great influence on water discharge due to an instantaneous flow rate of a flowing fluid in a fluid element using a Karman vortex. It is to be.

In order to solve the above problems, a water spouting device according to the present invention is a water spouting device that discharges hot water while reciprocally vibrating, and the water spouting device main body and the hot water supplied to the water spouting device main body are reciprocally vibrated. And a vibration generating element that discharges while performing the discharge. Further, the vibration generating element is provided in a water supply passage into which hot water supplied from the water discharger body flows, and a hot water/water collision unit provided on the downstream side of the water supply passage so as to block a part of a cross section of the flow path. When a part of the hot and cold water introduced from the water supply passage collides with the hot and cold water collision portion, a vortex generation passage for alternately generating opposite vortices on the downstream side thereof and a downstream side of the vortex generation passage provided, when the spout passage for discharging while reciprocally vibrating the hot water containing the vortex that is derived from the vortex generating path, hot water instantaneous flow rate supplied to the water supply passage is increased, and the collision portion And a flow path varying portion for enlarging the flow passage cross-sectional area of the vortex generating portion formed between the inner wall surface of the periphery and the inner wall surface.

According to the present invention configured as described above, since the hot water discharged from the water discharge device can be reciprocally oscillated by the vibration generating element, the hot water can be spread over a wide range from one water discharge outlet with a compact and simple structure. Can be discharged. Further, since the water discharge direction can be changed without moving the nozzle for discharging, it is possible to configure a water discharge device having a low cost and high durability without problems such as wear of the movable portion. Further, by providing the flow path varying unit, it is possible to suppress a large change in the flow velocity of the hot water flowing between the hot water collision unit and the water supply passage even if the flow rate of the hot water supplied is changed. That is, it is possible to stably generate a desired Karman vortex and generate a desired vibration water discharge regardless of the instantaneous flow rate of the hot water.

In the water discharge device according to the present invention is also the passage variable region, from the water supply passage is connected to the vortex generation communication path, even if the flow path changing unit is enlarged, the stepped portion is not formed Is also preferably connected.

According to the present invention having such a configuration, no step is formed between the flow path varying portion and the vortex generating passage even when the flow path varying portion is enlarged. As a result, a stable Karman vortex is generated, and the reciprocating motion of hot and cold water can be stabilized.

Further, in the water discharge device according to the present invention, it is also preferable that the flow path varying portion is formed of a soft member.

According to the present invention having such a configuration, it is possible to increase the flow passage cross-sectional area of the vortex generating portion with a simple configuration.

According to the present invention, in a fluid element using a Karman vortex, there is provided a water discharge device in which hot water discharged from the water discharge device stably reciprocates even when the instantaneous flow rate of the supplied hot water changes. be able to.

It is an external view of the water discharger in this invention. It is an exploded perspective view of the water discharger in the present invention. It is sectional drawing of the water discharge apparatus in this invention. It is an external view of the vibration generating element in this invention. It is a schematic diagram showing a state of oscillation of water discharge in the present invention. It is a schematic diagram of a vibration generating element when the instantaneous flow rate changes in a proportional manner. It is a schematic diagram of the vibration generating element when the instantaneous flow rate changes in the present invention. It is a schematic diagram of the vibration generating element when the instantaneous flow rate changes in the modification of the present invention. It is a schematic diagram of the vibration generating element when the instantaneous flow rate changes in the modification of the present invention. It is a figure which shows the structure of the fluid element described in patent document 3.

Hereinafter, the water discharger 1 according to the embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is an external view of a water discharger 1 according to the present invention. The water spouting device 1 is a so-called hand shower, and includes a water spouting device main body 10 and a vibration generating element 2 provided in the water spouting device main body 10. The water discharger main body 10 is largely composed of a water discharge head 12 and a grip portion 14. The water discharge head 10 is provided with two kinds of water discharge nozzles, that is, a plurality of water discharge nozzles 16 and a vibration generating element 2. The water discharge head 10 is configured to discharge water at the same time or by switching.

FIG. 2 is an exploded perspective view of the water discharger 1 according to the present invention. The water spouting head 12 is composed of a water sprinkling plate 18 provided on the surface, a vibration generating element 2, and a water sprinkling packing 4 made of a soft material and having a water spouting nozzle 16. The water spray plate 18 is provided with a plurality of openings, and the vibration generating element 2 and the water discharge nozzle 16 are assembled so as to project from the openings through the openings.

FIG. 3 is a sectional view of the water discharger 1 according to the present invention. As shown in FIG. 3, the water sprinkling packing 4 is fixed so as to be sandwiched between the water spouting head main body 120 and the water sprinkling plate 18. In addition, a water supply path 140 is formed inside the grip portion 14, and has a structure for supplying hot water supplied from a shower hose (not shown) to the water discharge head 12.

FIG. 4 shows an external view of the vibration generating element 2 according to the present invention. The vibration generating element 2 is a nozzle that has a substantially rectangular water discharge port and discharges water while reciprocally vibrating in the longitudinal direction of the rectangle. At this time, the first wall surface has a pair of first wall surface portions 242 on the longitudinal side that coincides with the direction in which the hot and cold water reciprocates and a pair of second wall surface portions 244 on the transverse direction side that is orthogonal. The portion 242 is thicker than the second wall surface portion 244.

FIG. 5 is a schematic diagram showing how the vibration generating element 2 in the main body operates.
5A is a sectional view taken along the line AA in FIG. 4, and as shown here, a passage having a rectangular cross section is formed inside the vibration generating element 2 so as to penetrate in the longitudinal direction. This passage is formed as a water supply passage 20, a vortex generating passage 22, and a water outlet passage 26 in this order from the upstream side. The water supply passage 20 is a linear passage having a rectangular cross section with a constant cross-sectional area extending from the back-side inlet of the vibration generating element 2. The wall surface of the water supply passage 20 is made of a soft material.

The vortex generation passage 22 is a passage having a rectangular cross section that is provided on the downstream side of the water supply passage 20 so as to be continuous with the water supply passage 20 (without a step). That is, the water supply passage 20 to the vortex generation passage 22 have the same size and shape.
The spout passage 24 is a passage having a rectangular cross section that is provided further downstream of the vortex generation passage 22 so as to be continuous with the vortex generation passage 22. The spout passage 24 is configured such that the length of the rectangular cross section in the long side direction is shorter than that of the vortex generation passage 22, and the cross sectional area is smaller.

A hot and cold water collision portion 26 is provided between the water supply passage 20 and the vortex generation passage 22. As shown in FIG. 5B (a sectional view taken along the line BB in FIG. 4), the hot and cold water collision portion 26 is a triangle extending so as to connect wall surfaces (ceiling surface and floor surface) that oppose each other in the height direction of the water supply passage 20. It is a columnar portion, and is arranged in an island shape at the center of the water supply passage 20 in the width direction. The cross section of the hot and cold water collision portion 26 is formed in an isosceles triangular shape, and the two sides having the same length are arranged so as to face the downstream side. By providing the hot and cold water collision portion 26, a Karman vortex is generated in the vortex generation passage 22 on the downstream side, and hot and cold water discharged from the water discharge passage 24 is reciprocally oscillated. At this time, the hot water spouted from the spout passage 24 is discharged from the spout passage 24 and then ruptures into water droplets.

The area of the surface of the hot and cold water collision portion 26 on which hot and cold water flowing from the water supply passage 20 collides, that is, the flow passage cross-sectional area of the portion of the water supply passage 20 which is blocked by the hot and cold water collision portion 26, is the outlet. It is configured to be larger than the flow passage cross-sectional area of the passage 24.

FIG. 6 schematically shows how the instantaneous flow rate of the vibration generating element 2 changes in comparison. 6A shows the case where the instantaneous flow rate is small, and FIG. 6B shows the case where the instantaneous flow rate is large.
When the instantaneous flow rate is constant as shown in FIG. 6(a), the velocity of the hot water passing through the vortex generator between the hot water collision unit 26 and the surrounding water supply passage 20 is also constant. Therefore, the Karman vortices generated in the vortex generation passage 22 on the downstream side are also generated at the upper side and the lower side alternately at a constant size and speed, and the water discharged from the water discharge passage 24 also performs a constant reciprocating motion. It is spouted.

However, as shown in FIG. 6(b), when the instantaneous flow rate increases, the speed of the hot water passing through the vortex generator becomes faster. Therefore, the cycle of the Karman vortices generated in the vortex generation passage 22 becomes shorter, and finally the oscillation cycle of the water discharged from the water discharge passage 24 becomes faster. In addition, when the instantaneous flow rate exceeds the predetermined flow rate and the velocity of the hot water passing through the vortex generator becomes equal to or higher than the predetermined velocity, the hot and cold water droplets discharged from the spout passage 24 are mutually separated at the turnaround portion of the vibration. The phenomenon of collision occurs. As a result, a state in which the water droplets are large only at the folded back portion of the vibration, that is, the left and right end portions of the reciprocating motion, and the sensation of the water droplets is sparse occurs, which adversely affects the bathing comfort.

On the other hand, although not shown, when the instantaneous flow rate decreases, the velocity of the hot water passing through the vortex generator becomes slow. For this reason, the period of the Karman vortex generated in the vortex generation passage 22 becomes long, and finally the reciprocating motion of the water discharge from the water discharge passage 24 becomes slow. Further, if the instantaneous flow rate falls below a certain level, the Karman vortex will not be generated and the reciprocating motion of the discharged water may be lost.

FIG. 7 shows a schematic diagram of water discharge of the vibration generating element 2 according to the present invention. FIG. 7A shows a state of the vibration generating element 2 at the standard instantaneous flow rate. When the hot water flows in at a constant instantaneous flow rate, it passes through the upper and lower sides of the hot water collision flow path at a constant speed, so that a constant Karman vortex is generated and a constant reciprocating motion is performed from the spout passage 24. While being discharged.

FIG. 7B shows a case where the instantaneous flow rate of the hot water supplied next increases. Since the water supply passage 20 is made of a soft member, when the instantaneous flow rate of the hot water increases, the diaphragm variable portion 60 deforms in the expanding direction due to the water pressure. That is, the gap between the hot water collision unit 26 and the water supply passage 20 is enlarged. As a result, even if the instantaneous flow rate increases, the flow passage cross-sectional area of the vortex generator changes, so the velocity of the hot water passing through the vortex generator has a standard instantaneous flow rate as shown in FIG. Compared with the case, it can be made substantially constant. In other words, the generated Karman vortex and the reciprocating motion of the hot water caused by the Karman vortex are substantially constant.

On the other hand, although not shown, a case where the instantaneous flow rate of the supplied hot water decreases will be described. In this case, contrary to FIG. 7B, the diaphragm variable portion 60 contracts due to the elastic force of the soft member, and the water supply passage 20 deforms in the direction of contraction. That is, the gap between the hot water collision unit 26 and the water supply passage 20 is reduced. As a result, even if the instantaneous flow rate is decreased, the cross-sectional area of the flow path is reduced, so that the velocity of the hot water flowing above and below the hot water collision unit is the standard instantaneous flow rate shown in FIG. It can be made substantially constant as compared with the case of. That is, both the generated Karman vortex and the reciprocating motion of hot and cold water caused by the Karman vortex can be brought close to the desired vibration.

The soft member constituting the water supply passage 20 is fixed between the vortex generation passage 22 and the soft member, and is configured to perform expansion/contraction movements with this connection point serving as a fulcrum. That is, as shown in (b) and (c) of FIG. 7, even when the water supply passage 20 is enlarged or reduced, a step is not formed between the water supply passage 20 and the vortex generation passage 22. is there. As a result, the generation of Karman vortices becomes more stable, and the reciprocating motion of the discharged water becomes more stable.

A modification of the present invention is shown in FIG. In the modification, the water supply passage 20 is made of a hard member, but is urged by a constant force from the outer peripheral direction by a spring or the like. According to the balance between this urging force and the instantaneous flow rate of the supplied hot water, that is, the water pressure, the diaphragm variable portion 60 formed of a hard member moves to change the flow passage cross-sectional area of the vortex generating portion. Has been done.

If the instantaneous flow rate of the hot water supplied is a standard amount, the position is as shown in FIG. 8(a). As the instantaneous flow rate increases, the force of the hot water increases, and as shown in FIG. 8B, the water supply passage 20 expands in the direction in which it overcomes the urging force, that is, in the direction away from the hot water collision unit 26, and the flow passage cross-sectional area also increases. To do. On the other hand, when the instantaneous flow rate decreases, the force of the hot water decreases, and although not shown, the urging force narrows the water supply passage 20 in the direction approaching the hot water collision unit 26, and the flow passage cross-sectional area also decreases.
By these movements of the water supply passage 20, the velocity of the hot water flowing on the upper side and the lower side of the hot water colliding portion 26 is kept substantially constant, and the Karman vortex and the reciprocating motion of the hot water caused thereby are also kept substantially constant. Of.

The embodiments and modifications of the present invention have been described above with reference to the drawings. The present invention is not limited to these exemplifications, and various designs can be made without departing from the present invention.
For example, only the diaphragm variable portion 60 may be made of a soft member, or, as shown in FIG. 9, the entire vibration generating element 2 may be made of a soft member. Further, as shown in FIG. 9, an expansion restricting member 70 that restricts the expansion amount may be provided with a gap provided on the outer periphery of the diaphragm variable portion.

Water discharge device 1
Water discharge device body 10
Spout head 12
Water discharge head body 120
Gripping part 14
Water channel 140
Water discharge nozzle 16
Watering plate 18
Vibration generator 2
Water supply passage 20
Vortex path 22
Spout passage 24
First wall surface part 242
Second wall surface 244
Hot water collision part 26
Watering packing 4
Seal part 40
Deformation control part 42
Fixed part 44
Deformation control member 6
Variable aperture 60

Claims (3)

A water discharge device for discharging hot water while reciprocally vibrating,
The water discharge device body,
A vibration generating element which is attached to the body of the water discharger and discharges the supplied hot and cold water while reciprocally vibrating the water.
The vibration generating element,
A water supply passage into which hot water supplied from the water discharger body flows,
It has a hot and cold water collision portion which is provided on the downstream side of the water supply passage and is provided so as to close a part of the flow passage cross section, and a part of the hot water and water introduced from the water supply passage collides with the hot water and water collision portion. , And a vortex generation passage that alternately generates vortices of opposite directions on the downstream side,
A spout passage that is provided on the downstream side of the vortex generation passage and discharges hot and cold water including the vortex row guided from the vortex generation passage while reciprocally oscillating.
When hot water of instantaneous flow rate supplied to the water supply passage is increased, and a vortex generating portion of the flow path flow to enlarge the cross-sectional area path variable portion formed between the collision portion and the inner wall surface of the surrounding, A water spouting device comprising: The flow path changing unit from the water supply passage is connected to the vortex generation communication path, even if the flow path variable portion is expanded, and characterized in that it is connected to the stepped portion is not formed The water discharger according to claim 1. The water discharger according to claim 1 or 2, wherein the flow path varying portion is formed of a soft member.

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