JP7356633B2 - Water discharging device - Google Patents

Description

The present invention relates to a water discharging device that discharges hot water or water while vibrating it back and forth.

Patent Document 1 describes a water discharging device that utilizes an oscillation phenomenon caused by a vibration generating element (also referred to as a fluid element). According to the water discharging device, the jetting direction of water can be changed without providing a movable member. Therefore, a water discharging device capable of discharging water over a wider range can be realized with a simple and compact configuration.

In the water discharging device described in Patent Document 1, as shown in FIG. collides with the hot water collision area). When the fluids collide, on the downstream side of the obstacle 116, Karman vortices are generated alternately above and below the obstacle 116, forming a vortex train. The vortex train of this Karman vortex reaches the outlet 112 while growing. In the vicinity of the outlet 112, the flow velocity is high on the side of the vortex train where the vortex exists, and the flow velocity on the opposite side is slow. In the example shown in FIG. 8, Karman vortices are generated alternately above and below the obstacle 116, and these vortex trains sequentially reach the outlet 112, so that near the outlet 112, the upper flow velocity is high; States in which the flow velocity on the lower side is faster appear alternately. When the flow velocity on the upper side is high, the fluid with high flow velocity collides with the wall surface 110a on the upper side of the outlet 112 and its direction is changed, and the fluid injected from the outlet 112 as a whole becomes a jet flow diagonally downward. On the other hand, when the flow velocity on the lower side is high, the fluid with high flow velocity collides with the wall surface 110b on the lower side of the outlet 112, and a jet stream directed diagonally upward is ejected from the outlet 112. By repeating such a state alternately, the jet stream from the outlet 112 is ejected while vibrating back and forth. According to this type of water discharging device, a water discharging device capable of discharging water over a wider range can be realized with an extremely simple and compact configuration.

When the water discharging device of the method described in Patent Document 1 is used for a long period of time in an area where tap water contains a large amount of calcium components, scale produced by solidification of calcium components may adhere to the inner wall surface of the spout. It is possible. When scale adheres to the inner wall surface of the water spout in this way, the vibration amplitude and vibration period of the water spout change, causing a problem in that desired water spouting cannot be achieved. This scale is difficult to remove with the power of water flow alone, but it can be removed by physically rubbing it or by deforming the wall itself to which the scale is attached. For this reason, it is preferable that the spout section be formed of an elastically deformable soft member and attached to the main body of the water spouting device so that the user can deform the spout section.

However, when forming the spout portion with an elastically deformable soft member, for example, if the vortex generation passage that generates the Karman vortex is integrally molded with the soft member, the inner wall surface of the vortex generation passage will expand and deform. , there is a possibility that the desired vortex cannot be generated.

Patent Document 2 discloses a water discharging device employing a similar principle, in which a vibration generating element is manufactured by integral molding from a soft member. In the water discharging device described in Patent Document 2, in order to overcome the above-mentioned problem, measures such as providing a deformation regulating section are taken to prevent the inner wall surface of the vortex generation passage from expanding. There is.

Special Publication No. 58-49300 JP 2017-109152 Publication

As mentioned above, in the water discharging device described in Patent Document 2, the vibration generating element is manufactured by integral molding. Here, due to the principle of generating a vortex, it is necessary to provide a hot water collision part (obstruction) in the hot water or a passage through which water flows, so the mold for molding is designed to separate above and below the hot water collision part. must be designed.

On the other hand, from a functional standpoint as a water spouting device, at least a portion of the spout passage from the vortex generation passage to the spout is tapered from the vortex generation passage side to the spout side. format is often adopted. In such a case, at present, after the vibration generating element is integrally molded, a step of removing the tapered portion from the mold while elastically deforming the vibration generating element is required.

Therefore, at present, the material of the vibration generating element is limited to a material that can withstand the above process, and it has not been possible to use a material that is lower cost and/or easier to mold.

The present invention has been made based on the above background. An object of the present invention is to provide a water spouting device equipped with a vibration generating element of a type in which at least a portion of the spout passage forms a constricted passage tapered from the vortex generation passage side toward the spout side. It is an object of the present invention to provide a water discharging device that does not require elastic deformation of the tapered throttle passage at least at the time of manufacture.

The present invention is a water discharging device equipped with a vibration generating element that discharges hot water or water while vibrating it back and forth, and the vibration generating element is provided in a water supply passage into which hot water or water flows and on the downstream side of the water supply passage. and a hot water collision part provided so as to block a part of the flow passage cross section of the water supply passage; and a hot water collision part provided downstream of the water supply passage and the hot water collision part, and guided from the water supply passage to prevent the hot water collision from occurring. A vortex generation passage through which the hot water or water that collides with the part passes through as vortices in the opposite direction, and a vortex generation passage provided on the downstream side of the vortex generation passage, and the hot water or water that alternately becomes the vortex in the opposite direction is discharged. and a water spout passage that connects the vortex generation passage and the water spout, and the water spout passage has a water spout passage that extends from the vortex generation passage side toward the water spout side. A throttle passage is formed, at least a part of which is narrowed in a tapered shape, the water supply passage and the hot water collision part are integrally formed by a first member, and the throttle passage of the water outlet passage is , a water discharging device characterized in that it is constituted by a second member that is separable from the first member.

According to the present invention, the water supply passage and the hot water collision part are integrally constituted by the first member, and the tapered throttle passage of the water outlet passage is constituted by the second member that is separable from the first member. Therefore, when integrally molding the second member, it is possible to use a mold that separates the upper and lower parts of the tapered aperture passage, and after the second member is integrally molded, the tapered aperture passage can be elastically deformed. There's no need to do it. On the other hand, since the water supply passage and the hot water collision part are integrally formed by the first member, it is easy to form a region involved in vortex generation with high dimensional accuracy.

Preferably, the water supply passage, the hot water collision part, and the vortex generation passage are integrally formed by a first member.

According to this aspect, it is easier to form the region involved in vortex generation with high dimensional accuracy.

Further, preferably, the first member is formed of a hard member, and the second member is formed of a soft member.

In this case, even if the calcium component solidifies and adheres to the inner wall surface of the spout (the second member made of a soft material) due to use in an area where tap water contains a large amount of calcium components, It is easy to remove the calcium component (scale) by elastically deforming the inner wall surface itself, and at the same time, the area involved in vortex generation is formed with a hard material that is easy to mold, so it can be formed with high dimensional accuracy. It is even easier.

On the other hand, since the first member having the water supply passage is made of a hard material, so-called hunting (periodic deformation; for example, a substantially rectangular inlet is flattened and then returned to its original shape). ) can be suppressed.

This effect of suppressing hunting brings about the effect that generation of abnormal noise can be significantly reduced compared to the case where the water supply passage is formed of a soft member.

To add to the explanation, in a water discharging device using a vibration generating element, abnormal noise is generated due to periodic pressure fluctuations and cavitation accompanying the generation of Karman vortices. The faster the water flows, the louder the noise becomes and the easier it is to be detected. Therefore, if the first member is made of a soft material, if the water supply passage is deformed (flattened) due to an increase in water pressure, the water flow rate will increase and the noise will become louder. When the water supply passage is formed from a hard member, deformation of the water supply passage is suppressed, so that the flow velocity of water is maintained, and an increase in abnormal noise is also suppressed.

Moreover, in this case, it is preferable that the first member has an inner cylindrical wall that is fitted to the inner peripheral side of the annular wall provided on the second member.

According to this aspect, it is possible to seal the first member and the second member to each other without providing a separate seal member.

Moreover, in this case, it is preferable that the first member has an outer cylindrical wall that is fitted to the outer peripheral side of the annular wall of the second member.

According to this aspect, the first member can be positioned more easily with respect to the second member.

Further, it is preferable that the throttle passage of the water spout passage is tapered from the boundary between the first member and the second member.

According to such an aspect, integral molding of the second member becomes easier, and manufacturing costs can be suppressed.

Further, it is preferable that the vortex generation passage is longer than the water spout passage.

According to such an aspect, the size of the second member can be suppressed, so that manufacturing costs can be suppressed.

According to the present invention, the water supply passage and the hot water collision part are integrally constituted by the first member, and the tapered throttle passage of the water outlet passage is constituted by the second member that is separable from the first member. Therefore, when integrally molding the second member, it is possible to use a mold that separates the upper and lower parts of the tapered aperture passage, and after the second member is integrally molded, the tapered aperture passage can be elastically deformed. There's no need to do it. On the other hand, since the water supply passage and the hot water collision part are integrally formed by the first member, it is easy to form a region involved in vortex generation with high dimensional accuracy.

FIG. 1 is an exploded perspective view of a water discharging device according to an embodiment of the present invention, seen from above. FIG. 1 is an exploded perspective view from below of a water discharging device according to an embodiment of the present invention. FIG. 3 is a schematic perspective view of the vibration generating element of FIGS. 1 and 2. FIG. FIG. 3 is a schematic vertical cross-sectional view of the vibration generating element of FIGS. 1 and 2. FIG. FIG. 5 is a cross-sectional view of the vibration generating element in FIG. 4 taken along line VV. FIG. 4 is a diagram corresponding to FIG. 3 regarding a modification of the vibration generating element. FIG. 4 is a diagram corresponding to FIG. 3 regarding another modification of the vibration generating element. 1 is a diagram showing the configuration of a vibration generating element described in Patent Document 1. FIG.

Next, a water supply device according to an embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is an exploded perspective view of a water discharging device 1 according to an embodiment of the present invention seen from above, and FIG. 2 is an exploded perspective view of a water discharging device 1 according to an embodiment of the present invention seen from below. 3 is a schematic perspective view of the vibration generating element 2 of FIGS. 1 and 2, FIG. 4 is a schematic vertical sectional view of the vibration generating element 2 of FIGS. 1 and 2, and FIG. 5 is a schematic perspective view of the vibration generating element 2 of FIG. FIG. 2 is a cross-sectional view of the vibration generating element 2 in the VV line direction.

As shown in FIGS. 1 and 2, the water discharging device 1 of this embodiment is a so-called hand shower, and is composed of a water discharging device main body 10 and a vibration generating element 2 provided in the water discharging device main body 10. ing. The water discharging device main body 10 has a water discharging head 12 and a grip portion 14 .

As shown in FIGS. 3 to 5, the vibration generating element 2 in this embodiment is provided at a water supply passage 20 into which hot water or water flows, and at a downstream side of the water supply passage 20, and is provided in a part of a flow passage cross section of the water supply passage 20. The hot water or water colliding part 26 provided so as to block the water supply passage 20 and the hot water colliding part 26 provided on the downstream side of the water supply passage 20 and the hot water colliding part 26 and the hot water or water guided from the water supply passage 20 and colliding with the hot water colliding part 26 alternately rotating in opposite directions. A vortex generation passage 22 that passes through as a vortex, a spout 28 that is provided on the downstream side of the vortex generation passage 22 and from which hot water or water is alternately spouted in the opposite direction; It has a spout passage 24 that communicates with a water spout 28 .

Further, as shown in FIGS. 3 to 5, the water supply passage 20, the hot water collision part 26, and the vortex generation passage 22 are integrally formed by the first member A. On the other hand, the spout passage 24 and the spout 28 are constituted by a second member B that is separable from the first member.

Further, as shown in FIGS. 3 to 5, at least a portion of the water spout passage 24 is tapered from the vortex generation passage 22 side toward the water spout 28 side to form a throttle passage. . More specifically, the spout passage 24 of this embodiment starts tapered in the left-right direction in FIG. 5 from the boundary between the first member A and the second member B, and has an equal taper. The angle reaches close to the spout 28. (In the left-right direction in FIG. 4, the passage width of the water outlet passage 24 is constant.)

Note that in this embodiment, the first member A is made of a hard member (for example, POM (polyacetal)), and the second member B is made of a soft member (for example, TPE (thermoplastic elastomer)). .

Further, as shown in FIGS. 3 to 5, the first member A has an inner cylindrical wall 41 that is inserted and fitted inside the annular wall 31 provided on the second member B. (The inner wall surface of the cylindrical wall 41 forms part of the water supply passage 20 and the vortex generation passage 22.)

Further, as shown in FIGS. 3 to 5, the first member A has an outer cylindrical wall 42 that is fitted to the outer peripheral side of the annular wall 31 of the second member B.

On the other hand, a plurality of water discharge nozzles 16 are also formed on the second member B. The water spout 28 and the water spout nozzle 16 of the vibration generating element 2 are arranged so as to protrude from the lower surface side of the water spouting head 12, as shown in FIG. Two types of water spout groups, the plurality of water spouts 28 of the vibration generating element 2 and the plurality of water spout nozzles 16, can be used simultaneously or in a switched manner. As shown in FIG. 2, each water spout 28 of the vibration generating element 2 is a substantially rectangular opening, and is capable of spouting water in a pattern that vibrates back and forth in its longitudinal direction.

Further, a water supply channel is formed inside the grip portion 14, and hot water or water supplied from, for example, a shower hose (not shown) is supplied to the water spouting head 12.

According to the water discharging device 1 of the present embodiment as described above, the water supply passage 20, the hot water collision part 26, and the vortex generation passage 22 are integrally constituted by the first member A, while the water spout passage 24 and Since the water spout 28 is constituted by the second member B that is separable from the first member A, the water spout passage 24 is tapered from the vortex generation passage 22 side toward the water spout 28 side. Even if a throttle passage is formed, when integrally molding the second member B, it is possible to use molds that separate the upper and lower parts of the tapered throttle passage, and the second member B can be integrally molded. There is no need to elastically deform the tapered throttle passage afterwards. This expands the range of material selection for the second member B, making it possible to use a material that is lower in cost and/or easier to mold.

Further, according to the water discharging device 1 of the present embodiment, since the water supply passage 20, the hot water collision part 26, and the vortex generation passage 22 are integrally constituted by the first member A, the area involved in vortex generation is integrated. It is easy to form with high dimensional accuracy.

Moreover, according to the water discharging device 1 of this embodiment, the first member A is formed of a hard member, and the second member B is formed of a soft member.

As a result, even if the calcium component solidifies and adheres to the inner wall surface of the spout 28 (the second member B formed of a soft material) when used in an area where tap water contains a large amount of calcium components, the By elastically deforming the inner wall surface of the water port 28 itself, it is easy to remove the calcium component (scale).

On the other hand, since the first member A having the water supply passage 20 is made of a hard material, so-called hunting (periodic deformation; for example, a substantially rectangular inlet collapses into a flatter shape and then returns to its original shape). The occurrence of abnormal noise caused by cavitation or the like can be significantly reduced compared to the case where the water supply passage 20 is formed of a soft material.

Further, according to the water discharging device 1 of the present embodiment, the first member A has an inner cylindrical wall 41 that is inserted and fitted into the inner peripheral side of the annular wall 31 provided on the second member B. ing. This makes it possible to seal the first member A and the second member B to each other without providing a separate sealing member.

Moreover, according to the water discharging device 1 of this embodiment, the first member A has the outer cylindrical wall 42 fitted to the outer peripheral side of the annular wall 31 of the second member B. Thereby, positioning of the first member A with respect to the second member B can be performed more easily.

Further, according to the water spouting device 1 of this embodiment, the water spout passage 24 forms a constricted passage tapered from the boundary between the first member A and the second member B. This makes it easier to integrally mold the second member B, and further reduces manufacturing costs.

Next, FIG. 6 is a diagram corresponding to FIG. 3 regarding a modification of the vibration generating element. In the example shown in FIG. 6, the length of the vortex generation passage 22' in the vertical direction (water supply direction) is longer than the length of the water outlet passage 24' in the vertical direction. The other configuration of the vibration generating element in FIG. 6 is substantially the same as the configuration of the vibration generating element in FIG. 3. In the vibration generating element of FIG. 6, the same parts as those of the vibration generating element of FIG. 3 are denoted by the same reference numerals, and the description thereof will be omitted.

In such a case, since the size of the second member B can be suppressed, manufacturing costs can be further suppressed.

Next, FIG. 7 is a diagram corresponding to FIG. 3 regarding another modification of the vibration generating element. In the example shown in FIG. 7, the vortex generation passage 22'' is formed by the second member B and has a tapered shape that is continuous with the water outlet passage 24''. The other configuration of the vibration generating element in FIG. 7 is substantially the same as the configuration of the vibration generating element in FIG. 3. In the vibration generating element of FIG. 7, the same parts as those of the vibration generating element of FIG. 3 are denoted by the same reference numerals, and their description will be omitted. At least at the time of filing this application, an embodiment as shown in FIG. 7 is not excluded from the present invention.

1 Water discharging device 2 Vibration generating element 10 Water discharging device main body 12 Water discharging head 14 Grip portion 16 Water discharging nozzle 20 Water supply passage 22 Vortex generation passage 22' Vortex generation passage 22" Vortex generation passage 24 Spout passage 24' Spout passage 24" Spout Passage 26 Hot water collision part 28 Spout 31 Annular wall 41 Inner cylindrical wall 42 Outer cylindrical wall A First member B Second member 110 Front chamber 110a Wall surface 110b Wall surface 112 Outlet 114 Inlet hole 116 Obstacle

Claims (6)

A water discharging device equipped with a vibration generating element that discharges hot water or water while vibrating it back and forth,
The vibration generating element is
a water supply passage through which hot water or water flows;
a hot water collision part provided on the downstream side of the water supply passage so as to block a part of the cross section of the water supply passage;
a vortex generation passage provided on the downstream side of the water supply passage and the hot water collision part, through which hot water or water guided from the water supply passage and collided with the hot water collision part alternately turns into counter-rotating vortices and passes through;
a spout provided on the downstream side of the vortex generation passage, through which hot water or water that has alternately turned into a vortex in opposite directions is spouted;
a water spout passage that communicates the vortex generation passage and the water spout;
It has
The water spout passage forms a throttle passage that is at least partially tapered from the vortex generation passage side toward the water spout side,
The water supply passage and the hot water collision part are integrally constituted by a first member,
The throttle passage of the water spout passage is constituted by a second member that is separable from the first member ,
The first member is formed of a hard member,
The second member is formed of a soft member.
A water discharging device characterized by: The water discharging device according to claim 1, wherein the water supply passage, the hot water collision part, and the vortex generation passage are integrally constituted by a first member. The water discharging device according to claim 1 or 2 , wherein the first member has an inner cylindrical wall that is fitted on the inner peripheral side of an annular wall provided on the second member. 4. The water discharging device according to claim 3 , wherein the first member has an outer cylindrical wall fitted to an outer peripheral side of the annular wall of the second member. The water spouting device according to any one of claims 1 to 4 , wherein the throttle passage of the water spout passage is tapered from a boundary between the first member and the second member. The water spouting device according to claim 5 , wherein the vortex generation passage is longer than the water spout passage.

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