JP2007056559A - Shower head - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shower head capable of foamingly discharging water to be supplied by efficiently mixing it with air without remarkably lowering the vigor of a stream. <P>SOLUTION: The shower head 1 has a water connection board 26 having a plurality of water connection holes 24 supplying water to a plurality of sprinkling holes 10, an air intake passage 33 taking air from the circumference by negative pressure resulted from the stream of water flowing out of at least the two water connection holes adjacent to each other of the water connection board, a water connection direction deciding section 34 deciding the direction of the stream so that water flowing out of at least the two water connection holes adjacent to each other can be made to collide with each other, a water connection collision section 36 formed in the shape of a foam by mixing water with the air taken into an air intake section while the water deciding directions by the water connection deciding section can be made to collide with each other and a rectifying section 38 discharging water formed in the shape of a foam by colliding with the water connection collision section from the sprinkling holes after it has been rectified. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a shower head, and more particularly to a shower head that discharges foamy water mixed with air.

  Conventionally, in a shower head used for a hot-water mixer tap for a kitchen, etc., when a user is performing work such as washing dishes in the sink using the water discharged from the shower head, water is discharged from the shower head. Shower head that discharges water in the form of foamy water mixed with air for the purpose of reducing the so-called "water splashing phenomenon" in which the discharged water hits the surface of the tableware or sink Is known (see, for example, Patent Document 1). In such a conventional shower head, a plurality of water passage holes are formed inside the shower head, and one water discharge hole (water spray hole) is formed corresponding to each one water passage hole. The water supplied to the inside of the head passes through each water passage hole and is discharged from the corresponding water discharge hole. In addition, a plurality of nets are provided between the water holes and the water discharge holes, and when the water flowing out from each water hole passes through these nets and flows into the water discharge holes, Air is drawn through the gap from the outside of the shower head by the negative pressure generated by the water flow. The drawn air and water flow are both agitated by passing through the net, so that foamy water mixed with air is generated and discharged from each water discharge hole.

JP 2004-181328 A

However, in the conventional showerhead described above, the flow of water flowing from the water passage hole to the water discharge hole is greatly affected by the pressure loss caused by passing through the net, so the momentum of water discharged from the water discharge hole is reduced. There is a problem that it ends up. In particular, when water having a relatively low water supply pressure is supplied to the shower head, there is a problem that the momentum of water discharged from the water discharge holes is remarkably reduced, and sufficient water discharge cannot be obtained.
In addition, the conventional mesh installed between the water flow hole and the water discharge hole of the shower head must be periodically removed and replaced due to clogging such as dust bites, which makes maintenance cumbersome. There is a problem that.

Therefore, the present invention has been made to solve the problems of the prior art, and efficiently discharges the supplied water into a foam by discharging air without significantly reducing the momentum of the water flow. It aims to provide a shower head that can be used.
Another object of the present invention is to provide a shower head that can reduce the maintenance burden by reducing the number of parts.

In order to achieve the above object, the present invention provides a shower head that discharges supplied water from a plurality of water discharge holes, and includes a plurality of water passage holes that supply water to the plurality of water discharge holes. A water part, an air intake part that generates a negative pressure by the water flow flowing out of at least two water holes adjacent to the water passage part, and draws air from the surroundings by the negative pressure, and the at least two adjacent water passages. The water flow direction determining unit that determines the direction of the water flow so that the water flowing out from the water holes collide with each other, and the water whose direction is determined by the water flow direction determining unit collide with each other and are drawn by the air intake unit. A water-impinging portion that mixes the air into a foam and a rectifying portion that rectifies the water that has collided with the water-impacting portion and foams the water from the water discharge hole. It is said.
In the present invention configured as described above, when the supplied water passes through the plurality of water passage holes of the water passage portion, the water passage direction determining portion causes at least two adjacent passages of the plurality of water passage holes to pass. The water flowing out from the water holes is directed so as to collide with each other, and air is drawn from the surroundings through the air intake portion using the negative pressure generated by the water flow. Further, the water directed by the water flow direction determining unit collides with each other at the water flow collision unit, and the air drawn from the air intake unit is mixed into a foam. Furthermore, the water which collided in the water flow collision part and became foamy is rectified by the rectification part, and is discharged from a water discharge hole. As a result, the supplied water can be discharged efficiently in the form of foam by mixing air efficiently without significantly reducing the momentum of the water flow. Moreover, since the number of parts of the shower head can be reduced by the water flow direction determining unit, the burden of maintenance of the shower head can be reduced.

In the present invention, the water flow direction determining unit is a flow channel formed so as to receive water flowing out from at least two adjacent water flow holes so that the cross section thereof becomes smaller in a mortar shape toward the downstream side. preferable.
With such a configuration, it is possible to make the supplied water foamy by efficiently mixing air without significantly reducing the momentum of the water flow. Moreover, since the number of parts of the shower head can be reduced by the water flow direction determining unit, the burden of maintenance of the shower head can be reduced.

In the present invention, the water flow direction determining unit may be water flow hole setting means for setting the direction of the water flow holes themselves so that water flowing out from at least two adjacent water flow holes collide with each other.
With such a configuration, it is possible to make the supplied water foamy by efficiently mixing air without significantly reducing the momentum of the water flow. Moreover, since the number of parts of the shower head can be reduced by the water flow direction determining unit, the burden of maintenance of the shower head can be reduced.

In this invention, a water flow direction determination part is provided in the exit vicinity of the adjacent at least 2 water flow hole, generates a negative pressure, and directs the water which flows out of the said water flow hole toward the said water flow collision part. Negative pressure generating means may be used.
With such a configuration, it is possible to make the supplied water foamy by efficiently mixing air without significantly reducing the momentum of the water flow. Since the number of parts of the shower head can be reduced by the water flow direction determining unit, the maintenance burden of the shower head can be reduced.

In the present invention, the rectifying unit includes a channel formed in a substantially cylindrical shape, and the length of the channel is preferably 4 to 20 mm.
With this configuration, the water that collides with the water-impacting part and becomes foamy flows through the substantially cylindrical flow path of the rectifying part, thereby rectifying the foamy water without significantly reducing the momentum of the water flow. Thus, water can be discharged from the water discharge hole.

  According to the shower head of the present invention, the supplied water can be discharged efficiently in the form of foam by mixing air efficiently without significantly reducing the momentum of the water flow. In addition, it is possible to reduce the maintenance burden by reducing the number of parts.

Hereinafter, embodiments of the shower head of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a schematic perspective view showing a water faucet device incorporating a shower head according to a first embodiment of the present invention. As shown in FIG. 1, the shower head 1 of this embodiment is incorporated in the water discharge side of a faucet device 2 called a “single lever hot / cold water mixing tap” used in a kitchen or the like.
Further, the faucet device 2 includes an operation lever 4, and the operation lever 4 is operated so that the temperature and the amount of water discharged from the water discharger 6 of the shower head 1 can be adjusted. ing.
Further, the water discharge portion 6 of the shower head 1 is formed with a single water discharge hole 8 opened at the center thereof, and a plurality of water discharge holes having a diameter smaller than the diameter of the water discharge hole 8 are formed around the water discharge hole 8. The watering hole 10 is formed. Moreover, the water discharge part 6 of the shower head 1 is provided with the switching handle | steering-wheel 12 which switches the water discharge state in the water discharge part 6 to a shower state or a non-shower state so that rotation is possible. By turning the switching handle 12, a setting for performing shower-like water discharge from only a plurality of water spray holes 10 (hereinafter referred to as “shower setting”), and a thick and single shape from only a single water discharge hole 8 It is comprised so that it can switch to the setting (henceforth "non-shower setting") which performs non-shower-like water discharge which becomes.

FIG. 2 is an enlarged side sectional view showing the shower head according to the first embodiment of the present invention. Here, the shower head 1 shown in FIG. 2 shows a state in which the switching handle 12 is set to the shower setting. In FIG. 2, the flow of water inside the shower head is indicated by solid arrows, and the flow of air is indicated by broken arrows.
As shown in FIG. 2, a water passage 16 through which water flowing in from the inflow portion 14 of the shower head 1 flows is formed inside the shower head 1. The water discharger 6 of the shower head 1 includes a flow path switching unit 18 provided integrally with the switching handle 12.
The flow path switching unit 18 is finally formed with a shower water passage 20 that communicates with each water spray hole 10 and a non-shower water passage 22 that communicates with a single water discharge hole 8. When the shower head 1 is in the shower setting state, only the water flow path 16a located upstream of the flow path switching unit 18 and the shower water flow path 20 of the flow path switching unit 18 communicate with each other, and the water flow path 16a and the non-shower water flow path. 22 does not communicate (see FIG. 2). On the contrary, when the shower head 1 is set to the non-shower setting, only the water passage 16a located upstream of the flow path switching unit 18 and the non-shower water passage 22 communicate with each other. The water channel 20 does not communicate.

Further, the shower water passage 20 of the flow path switching unit 18 is partitioned by a water passage plate 26 in which a plurality of water passage holes 24 are formed, and the water in the shower water passage 20 is supplied to each of the water passage plates 26. It passes only through the water passage hole 24 and flows to the water passage 30 of the water discharge unit 28 described later in detail.
Further, the water discharge unit 28 is disposed adjacent to the downstream side of the water flow plate 26. The water discharge unit 28 includes a plurality of water spray holes 10 at the downstream end thereof, and one water flow path 30 is formed for each water spray hole 10 in the water discharge unit 28.
Moreover, although mentioned later for details, about the some water flow hole 24 of the water flow board 26, it distinguishes for every water flow hole group G which makes three adjacent water flow holes 24 1 set, and each water flow path. The inlet 32 of the water flow direction determining unit 34, which will be described in detail later, which is the upstream end of 30, is arranged to face each water flow hole group G with a gap. That is, one water passage 30 (or one water spray hole 10) of the water discharge unit 28 communicates with three water holes 24 belonging to one corresponding water hole group G.
Further, an air intake passage 33 that is partially open to the atmosphere is formed between the water flow plate 26 and the water discharge unit 28.
Further, the water flowing out from each water hole 24 of each water hole group G passes through each water flow path 30 of the water discharge unit 28 corresponding to each water hole group G, and thereby passes through each air intake passage 33. Air drawn into the water passage 30 is mixed and maintained in a foamy state, and water is discharged from each water sprinkling hole 10.

Next, details of the water passage hole 24 of the water passage plate 26 and the water passage 30 of the water discharge unit 28 will be described.
FIG. 3 is an enlarged schematic view of only three water passage holes belonging to one water hole group of the water passage plate of the shower head of the present embodiment and one water passage of the water discharge unit corresponding thereto. FIG.
As shown in FIG. 3, the three water holes 24 belonging to one water hole group G of the water flow plate 26 are arranged so that the shape connecting the centers of the water holes 24 is an equilateral triangle. The water passage plate 24 extends so as to penetrate the normal direction.
In addition, the water flow path 30 of the water discharge unit 28 includes, in order from the upstream side toward the downstream side, an inlet portion 32 of the water flow direction determining unit 34, a water flow direction determining unit 34, and an outlet unit 40 of the water flow direction determining unit 34. The water flow collision part 36 and the water flow rectification part 38 are comprised.

  The inlet portion 32 of the water flow direction determining unit 34 is a portion into which water that has flowed out from the shower water flow channel 20 through each of the three water flow holes 24 of each water flow hole group G of the water flow plate 26 flows. The two inlet portions 32 are substantially sized so as to include all the corresponding three water passage holes 24. Specifically, the inlet portion 32 has a circular shape slightly larger than a circumscribed circle including all of the corresponding three water passage holes 24.

The water flow direction determining part 34 includes an inlet part 32 serving as an upstream end part thereof, and an outlet part 40 located on the downstream side of the inlet part 32 and having a diameter smaller than the diameter of the inlet part 32.
Further, a wall surface 42 is formed from the inlet portion 32 to the outlet portion 40 of the water flow direction determining portion 34 so as to be almost constricted in a mortar shape. When each water flow flowing out from each of the three water flow holes 24 of each water flow hole group G of the water flow plate 26 at a high flow rate is received by the inlet portion 32 of the water flow direction determining unit 34, each water flow direction is determined. Each water flow flows along the wall surface 42 of the water flow direction determining unit 34 and is directed toward the outlet 40.
Further, the water that has flowed out from the three water holes 24 of each water hole group G of the water flow plate 26 from the shower water flow path 20 flows into the water flow direction determining section 34 of each corresponding water flow path 30 at a high flow rate. Then, the air pressure in the air intake passage 33 is lowered by this water flow, and a negative pressure is generated from the outside of the shower head 1 through the air intake passage 33 to draw air in the direction of the water flow of the water flow direction determining unit 34. It is supposed to be.

  The inlet part 36 a of the water flow collision part 36 corresponds to the outlet part 40 of the water flow direction determination part 34. In the water flow collision unit 36, the water flows that have reached the outlet unit 40 collide with each other and start to merge, and the water flow that has been drawn into the water flow direction determination unit 34 from the air intake passage 33 collides at the outlet unit 40. In this way, foamy water mixed with a large amount of air is generated.

  The water flow rectification unit 38 includes a water spray hole 10 at the downstream end thereof, and the water flow collided by the water flow collision unit 36 and mixed with air to form a foam passes through the water flow rectification unit 38. The water is rectified and discharged from the water spray hole 10. The rectifying unit 38 has an upstream flow path 38a formed in a substantially truncated cone shape so as to slightly expand from the upstream end thereof to the downstream side, and water is sprayed from the downstream end of the upstream flow path 38a. A downstream flow path 38b formed in a substantially cylindrical shape over the hole 10 is provided.

Moreover, various dimensions of typical portions related to the water flow holes 24 of the water flow plate 26 and the water flow path 30 of the water discharge unit 28 that are desirable for realizing foamy water discharge from the water spray holes 10 are shown below.
In the case where hot water with a water supply pressure of 0.05 to 0.75 MPa is supplied to the water passage 16 of the shower head 1 using water for general daily use in the water supply, and the shower head 1 is used in a shower setting, the diameter of each water spray hole 10 is used. d1 is preferably 1 to 2 mm, and most preferably 1.5 mm.
As an example, when the diameter d1 of each water spray hole 10 corresponding to the three water holes 24 of each water hole group G is set to 1.5 mm, the diameter d2 of each water hole 24 is 0.3 to 0. 0.5 mm is preferred and 0.4 mm is most preferred.
The diameter d3 of the circumscribed circle including all the three water holes 24 of each water hole group G is preferably 2.8 to 4.0 mm, and most preferably 3.0 mm.
Furthermore, the diameter d4 of the inlet portion 32 of the water flow direction determining portion 34 is preferably larger than d3 by 0.1 mm or more, and most preferably 3.1 mm. Moreover, 1.5-2.0 mm is preferable and, as for the diameter d5 of the exit part 40 of the water flow direction determination part 34 of the water flow path 30, 2.0 mm is the most preferable.
In addition, the length L (the length of the rectification section) L of the downstream side flow path 38b portion of the rectification section 38 of the water passage 30 formed in a substantially cylindrical shape is preferably 4.0 to 20 mm, and most preferably 5.0 mm. .
Furthermore, assuming that the total channel cross-sectional area S1 of each water-hole group G, the channel cross-sectional area of one water hole 24 is s, and the channel cross-sectional area of each water hole 10 is S2, one water hole The ratio of the total channel cross-sectional area S2 of one water passage group G to the ten channel cross-sectional areas S2 (or the total channel cross-sectional area 3s of the three water holes 24), that is, the area ratio S1 / S2 (or 3s / S2) is preferably 0.10 to 0.40, and most preferably 0.16 to 0.27.

  In addition, in the shower head 1 of this embodiment, although the form which set the number of the water flow holes 24 which belong to one water flow hole group G to 3 as an example is demonstrated, it is limited to such a form. In addition, the number of water holes 24 belonging to one water hole group G may be set to two or four or more in addition to three. Any form may be used as long as a plurality of water holes belonging to the water hole group G are set. Moreover, when changing the water flow hole 24 into multiple pieces other than three in this way, each diameter d1, d2 is determined based on the area ratio S1 / S2 (= 0.10-0.40) mentioned above. can do.

Next, the operation of the shower head 1 of the present embodiment will be described.
The hot water flowing into the water flow path 16 from the inflow portion 14 of the shower head 1 set in the shower setting passes through the water flow path 16a located on the upstream side of the flow path switching unit 18 and then passes through the shower water flow path 20 of the flow path switching unit 18. Flowing into.
The water in the shower water channel 20 is diverted so as to pass through the three water holes 24 of each water hole group G of the water flow plate 26. Each water flow that has passed through each water flow hole 24 flows into the water flow direction determination unit 34 from the inlet 32 of each corresponding water flow direction determination unit 34 at a high flow velocity, and along the wall surface 42 of the water flow direction determination unit 34. And flow to the outlet 40 of the water flow direction determining unit 34. At this time, the atmospheric pressure around the water flow is lowered by the high flow velocity flowing from each water flow hole 24 to the water flow direction determining unit 34 and the air pressure in the air intake passage 33 is also lowered. A negative pressure is also generated through the intake passage 33 to draw air in the direction of the water flow in the water flow direction determining unit 34.
The respective water flows directed to the outlet 40 of the water flow direction determining unit 34 collide with each other in the water flow collision unit 36 of the water flow path 30 and are drawn from the air intake passage 33 together with the water flow of the water flow direction determining unit 34. It involves a lot of air. As a result, foamy water mixed with a large amount of air is generated in the water flow collision unit 36.
Water generated in the form of foam in the water flow collision unit 36 is rectified by flowing from the substantially truncated cone-shaped upstream flow channel 38a of the water flow rectification unit 38 through the substantially cylindrical downstream flow channel 38b. . Bubbles are distributed almost evenly in the rectified water flow, and the rectified water in a state of being maintained in the form of foam is discharged from the sprinkling holes 10.

Further, using the shower head 1 of the present embodiment, the foamed water discharge effect flowing out from each water spray hole is examined in the case where the number of water holes belonging to one water hole group G is two and three. An experiment (Experiment 1) was conducted. In this experiment 1, the diameter d1 of each water sprinkling hole is fixed to 1.5 mm, and the diameter d2 of the water passage hole is any of two or three water passage holes belonging to one water hole group G. Also in this case, d2 was changed by 0.05 mm from 0.2 to 1.0 mm, and the state of water discharged from each sprinkling hole 10 was confirmed.
When the number of water holes belonging to one water hole group G is set to two, when d2 = 0.3 mm (area ratio S1 / S2 = 0.08), the water discharge becomes a slag flow and is foamed. Although it confirmed that there was no, when it set to d2 = 0.35-0.60mm (area ratio S1 / S2 = 0.10-0.32), the foamy favorable water discharge was confirmed. In addition, when d2 = 0.70 mm (area ratio S1 / S2 = 0.44), it was confirmed that the water flowing into the water flow direction determining unit 34 overflows and flows back into the air intake passage 33.
On the other hand, when the number of water holes belonging to one water hole group G is set to 3, d2 = 0.3 mm to 0.45 mm (area ratio S1 / S2 = 0.12 to 0.27) is set. Then, foamy good water discharge was confirmed.
From the result of Experiment 1 when the number of the water passage holes is set to 2 and 3, the area ratio S1 / S2 is 0.10 to 0.10 in order to obtain a satisfactory foam-like water discharge from each sprinkling hole. It was found that setting to 0.40 was preferable.

Moreover, FIG. 4 is an experiment (experiment) in which the boundary between the rectified state and non-rectified state of the discharged water when the length of the rectifying section of the rectifying unit is changed and water is discharged from the sprinkling holes using the shower head of the present embodiment. It is a graph which shows the result of 2). Here, the horizontal axis of FIG. 4 indicates the pressure of water supplied to the shower head, and the vertical axis indicates the rectification section length L of the rectification unit of the shower head.
Each plot of FIG. 4 has shown the upper limit of the rectification | straightening area length used as a non-rectification state, such as the water discharge from the water sprinkling hole 10 becoming a slag flow. In addition to the plots shown in the figure, many experimental values were investigated in the range of the rectification section length L of 2 to 20 mm. If the experimental values were lower than the plot values in FIG. When it became a slag flow and became a non-rectification state and exceeded the plot value of FIG. 4, it has confirmed that foam-like water discharge was a favorable rectification state. That is, when the water pressure is in the range of 0.05 to 0.4 MPa, it was found that the foam-like water discharge is in a favorable rectified state by setting the rectifying section length L to at least 4 mm.
In addition, about the upper limit of the rectification | straightening area length L, since the magnitude | size of a shower head itself will also become large too large if the value is too large, in the shower head 1 of this embodiment, as a realistic value, as rectification | straightening area length L Is preferably about 20 mm.

According to the shower head 1 of this embodiment mentioned above, the water flow attached to the water flow path of the conventional shower head by the water flow direction determination part 34 and the water flow collision part 36 of the water flow path 30 of the water discharging unit 28 is made into foamy form. Without using a net for making it possible, water that has been mixed with air efficiently to form foam can be discharged from each sprinkling hole 10.
Moreover, according to the shower head 1 of this embodiment, since the net | network for making a water flow into a foam form becomes unnecessary, the influence of the pressure loss by water flow passing this net | network can be removed, Water can be discharged from each sprinkling hole 10 without significantly reducing the momentum. As a result, even when water having a relatively low water supply pressure is supplied to the shower head 1, sufficient water can be discharged from each water spray hole 10 without significantly reducing the momentum of the water flow.
Furthermore, according to the shower head 1 of this embodiment, since the net | network for making a water flow into a foam form becomes unnecessary, the burden of the maintenance of the shower head 1 can be reduced.

Moreover, the water discharge part 6 of the shower head 1 of this embodiment is provided with the single water discharge hole 8 and the several water spray hole 10, and the water discharge state in the water discharge part 6 is discharged from the some water spray hole 10 only by the switching handle 12. However, the present invention is not limited to such a form, and the water discharge part 6 is not provided with a single water discharge hole 8. Moreover, you may make it the form which has arrange | positioned only the several water spray hole 10 over the whole water discharging part 6. FIG.
Furthermore, although the shower head 1 of this embodiment demonstrated the form applied to the single lever hot-water mixing tap type faucet device 2, it is not limited to such a form, It can be applied to other types of shower faucet devices. Applicable.
In addition, the principle of performing foamy water discharge from the water spray hole 10 of the shower head 1 of the present embodiment is also applied to other water discharge devices that perform non-shower (single) water discharge from a single water discharge hole. Accordingly, foamy water discharge can be performed even in non-shower water discharge.

Next, a shower head according to a second embodiment of the present invention will be described.
FIG. 5 is an enlarged view of a portion of each water passage hole belonging to one water hole group of the water passage plate of the shower head according to the second embodiment of the present invention and a portion of one water passage of the water discharge unit corresponding thereto. FIG. 4 is a partially enlarged perspective view similar to FIG. Here, in FIG. 5, about the same part as the part of the shower head of 1st Embodiment, the same code | symbol is attached | subjected and those description is abbreviate | omitted.
As shown in FIG. 5, the shower head according to the present embodiment includes a group of water passage holes penetrating the water passage plate 50 as a means for replacing the water passage direction determining unit 34 in the water passage 30 of the shower head 1 according to the first embodiment. The flow paths 54 of the water holes 52 belonging to G ′ are formed obliquely so as to be directed to the central part 58 of the water flow collision part 36 of the water discharge unit 56, and flow out of the flow paths 54 of the water holes 52. The water flow is made to collide with the central portion 58 of the water collision portion 36.
In addition, two water holes 54 are arranged in each water hole group G ′, but the number of water holes 54 may be set to three or more.

In the shower head according to the second embodiment of the present invention configured as described above, each water flow that has passed through the flow channel 54 of each water flow hole 52 belonging to each water flow hole group G ′ passes through the water flow channel 30. It flows out at a high flow velocity toward the central portion 58 of the water collision portion 36 and collides with the central portion 58 of the water collision portion 36 of the water passage 30 as in the first embodiment. At the same time, the air drawn from the air intake passage 33 by each water flow flowing out from the flow path 54 of each water flow hole 52 is involved in the collided water flow, and a large amount of air is mixed in the water flow collision portion 36 of the water flow path 30. Foamy water is produced. The water generated in the form of foam in the water flow collision unit 36 is rectified in the water flow rectification unit 38 in the same manner as in the first embodiment, and the rectified water in a state of maintaining the foam shape is discharged from the sprinkling holes 10. .
According to the shower head of the present embodiment, by forming the flow paths 54 of the water flow holes 52 of the water flow plate 50 obliquely so as to be directed to the central portion 58 of the water flow collision part 36 of the water discharge unit 56, Similarly to the first embodiment, water that is efficiently mixed with air to be foamed can be discharged from each sprinkling hole 10 without reducing the momentum of the water flow. Moreover, since the net | network for making the water flow provided in the conventional shower head foamy becomes unnecessary, the burden of the maintenance of a shower head can be reduced.

Next, a shower head according to a third embodiment of the present invention will be described.
FIG. 6 is an enlarged view of a portion of each water passage hole belonging to one water hole group of the water passage plate of the shower head according to the third embodiment of the present invention and a part of one water passage of the water discharge unit corresponding thereto. FIG. 6 is a partially enlarged perspective view similar to FIG. 3 and FIG. Here, in FIG. 6, the same reference numerals are given to the same parts as the shower head parts of the first and second embodiments, and the description thereof is omitted.
As shown in FIG. 6, the shower head according to the present embodiment penetrates the substantially normal direction of the water flow plate 60 as a means for replacing the water flow direction determining unit 34 in the water flow path 30 of the shower head 1 according to the first embodiment. A negative pressure generating member 66 that generates a negative pressure that directs each water flow flowing out from each water flow hole 62 belonging to each water flow hole group G ″ to the central portion 58 of the water flow collision part 36 of the water discharge unit 56. I have.
The negative pressure generating member 66 is disposed at substantially the center of the three outlets 64a of the flow passages 64 of the water flow holes 62 in the water flow hole groups G '' located on the bottom surface 60a of the water flow plate 60. The downstream end 66a of the generating member 66 has a slightly narrowed shape as compared with the upstream end 66b.
Each water flow that flows out from the flow path 64 of each water flow hole 62 flows at a high flow rate in the vicinity of the side wall surface 66c of the negative pressure generating member 66 to the downstream side along the side wall surface 66c. A negative pressure is generated so as to be directed in a direction approaching the side wall surface 66c of the member 66, and each water flow is similar to that in the first and second embodiments in the water collision unit 36 in the water flow path 30 of the water discharge unit 56. A collision occurs at the central portion 58. At the same time, the air drawn from the air intake passage 33 by each water flow flowing out from the flow path 64 of each water flow hole 62 is caught in the water flow collided at the central portion 58 of the water flow collision portion 36, and the water flow collision portion. In the central portion 58 of 36, foamy water mixed with a large amount of air is generated.

  According to the shower head of the present embodiment, negative pressure is generated at substantially the center of the three outlets 64a of the flow passages 64 of the water flow holes 62 in the water flow hole groups G '' located on the bottom surface 60a of the water flow plate 60. By disposing the member 66, as in the first and second embodiments, it is possible to efficiently discharge water from each sprinkling hole 10 without reducing the momentum of the water flow, by mixing air efficiently into foam. . Moreover, since the net | network for making the water flow provided in the conventional shower head foamy becomes unnecessary, the burden of the maintenance of a shower head can be reduced.

It is a schematic perspective view which shows the water faucet apparatus in which the shower head by 1st Embodiment of this invention is integrated. It is an expanded side sectional view showing the shower head by a 1st embodiment of the present invention. 3 is an enlarged schematic view of only three water passage holes belonging to one water hole group of the water passage plate of the shower head according to the first embodiment of the present invention and one water passage of the water discharge unit corresponding thereto. FIG. Experiment (Experiment 2) which investigated the boundary of the rectification state of the discharged water and the non-rectified state when changing the length of the rectification section of the rectification unit by using the shower head according to the first embodiment of the present invention and discharging water from the water spray hole It is a graph which shows the result. Schematic by enlarging a part of each water hole belonging to one water hole group of the water hole group of the water flow plate of the shower head according to the second embodiment of the present invention and one water passage of the water discharge unit corresponding to them. FIG. 4 is a partially enlarged perspective view similar to FIG. 3. FIG. 5 is a schematic enlarged view of a portion of each water passage hole belonging to one water hole group of a water passage plate of a shower head according to the third embodiment of the present invention and a portion of one water passage of a water discharge unit corresponding thereto. FIG. 6 is a partially enlarged perspective view similar to FIGS. 3 and 5.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shower head 2 Water faucet device 4 Operation lever 6 Water discharge part of shower head 8 Water discharge hole 10 Water spray hole 12 Switching handle 14 Inflow part of shower head 1 16, 16a, 30 Water flow path 18 Flow path switching unit 20 Water flow path for shower 22 Non-shower water passage 24, 52, 62 Water passage hole 26, 50, 60 Water passage plate 28, 56 Water discharge unit 32 Entrance portion of water flow direction determining portion 33 Air intake passage 34 Water flow direction determining portion 36 Water flow collision Part 38 Water flow rectification part 40 Outlet part of water flow direction determination part 42 Wall surface 58 Central part of water flow collision part 66 Negative pressure generating member

Claims (5)

A shower head for discharging supplied water from a plurality of water discharge holes,
A water flow portion having a plurality of water flow holes for supplying water to the plurality of water discharge holes;
An air intake section that generates a negative pressure by the water flow of water flowing out from at least two adjacent water passage holes of the water passage section and draws air from the surroundings by the negative pressure;
A water flow direction determining unit that determines the direction of water flow so that the water that has flowed out from the at least two adjacent water flow holes collide with each other;
A water flow collision unit that collides the water whose directions are determined by the water flow direction determination unit with each other and mixes the air drawn in by the air intake unit into a foam,
A rectifying unit that rectifies water in a foam-like state by colliding with the water-impacting part and discharges water from the water discharge hole,
A shower head characterized by comprising:   2. The flow direction determining unit is a flow path formed so as to receive water flowing out from the at least two adjacent water flow holes so that a cross-section of the water flow direction determination unit decreases toward the downstream side in a mortar shape. Shower head.   2. The shower according to claim 1, wherein the water flow direction determining unit is a water flow hole setting unit that sets a direction of the water flow hole itself so that water flowing out from the at least two adjacent water flow holes collides with each other. head.   The water flow direction determining unit is provided near the outlets of the at least two adjacent water holes, generates negative pressure, and directs the water flowing out of the water holes toward the water collision part. The showerhead according to claim 1, which is a generating means.   The shower head according to any one of claims 1 to 4, wherein the rectifying unit includes a channel formed in a substantially cylindrical shape, and the length of the channel is 4 to 20 mm.

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