JP2004181328A - Shower head - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the detergency of the foamy water to be discharged from a shower head and the water-saving effect by adjusting the water pressure according to the discharge amount of the foamy water. <P>SOLUTION: This shower head is constituted so that air is sucked from an air intake, the sucked air is mixed in a water current to obtain foamy water and the foamy water is discharged from a water sprinkling hole of a water sprinkling plate. A net, an air mixing chamber to which the sucked air sucked from the air intake is supplied and a water passage hole through which water is supplied to the air mixing chamber are arranged in the shower head on the upstream side of the water sprinkling hole in this order from the side of the water sprinkling hole. The diameter of the water passage hole is made smaller than that of the water sprinkling hole. This shower head has the water passage holes of the same number as that of the water sprinkling holes. The central axis of the water sprinkling hole is made coincident with that of the water passage hole. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a shower head having a foamy shower water discharge function mixed with air.
[0002]
[Prior art]
In a kitchen faucet, since there is a distance from the spout to the bottom of the sink, there is a possibility that the hot water hits the bottom of the sink when the water is spouted and the hot water spatters around the sink. (This phenomenon is called the water splash phenomenon.)
Therefore, measures have been taken to prevent water splashing by mixing bubbles in hot and cold water to form a foamy spout.
On the other hand, at the time of washing the dishes, if the water spouting area is widened as a plurality of spouts instead of one spout, and the spouts are evenly applied to the dishes, the washing action becomes easier.
For this reason, a shower head and a faucet equipped with the shower head are proposed, which employ shower water spouts used in bathrooms and vanities so that large water can be spouted at a time when washing large-sized dishes. Have been.
[0003]
However, in the case of shower water spouting, when the amount of water is increased, the force of the water increases, and there is a possibility that a water splashing phenomenon may occur.
Particularly in kitchens, single-lever hot-water mixer taps that adjust the temperature of hot water and the amount of water discharged with a single lever are often used in consideration of operability. This single lever can perform all operations with one single lever, so it is very easy to operate, but it is difficult to make fine adjustments, and the amount of water increases more than necessary. There is a risk of splashing.
Therefore, it is desirable to make the shower spout foamy. However, it has not been proposed to foam the spout to a thin spout like a shower in a bathroom or a vanity stand. By adopting a plurality of watering holes that are slightly thinner than a single thick foamy spout as shown in FIG. 14 and FIG. 15, it is possible to obtain a spouty shower-like spout and perform widespread spouting. Prevents splashing.
[0004]
A specific configuration will be described with reference to FIGS.
In the shower head BX, a switching handle 122X is provided on the head body 2X, and by operating the switching handle 122X, the water discharge mode is switched to normal water discharge or a plurality of foam-like water discharges.
Specifically, the position of the ball 6X in the head body 2X changes in conjunction with the switching handle 122X, and closes one of the water holes 53X (one is shown in the figure), and the other is closed. Water is discharged from the water holes that are not filled.
And the normal water discharge is performed from the water discharge port 131X provided in the center of the watering plate 10X.
Further, the plurality of foamy water spouts are spouted from water sprinkling holes 101X arranged in the circumferential direction of the water sprinkling plate 10X.
As shown in FIG. 15, the water sprinkling holes 101 </ b> X for discharging a plurality of foamy waters have a diameter of 6.5 mm, and the number of the water sprinkling holes 101 </ b> X is eight. An air suction port 134X is provided between the water sprinkling holes 101X.
A water hole 81X is provided upstream of the water hole 101X. The water holes 81X have a diameter of 1.2 mm, and the number of the water holes 81X is three for one watering hole 101X.
Further, an air mixing chamber 106X and a net 11X are provided between the water passage hole 81X and the water spray hole 101X. The air suction port 134X extends from the sprinkling plate 10X through the net 11X to the center of the aeration chamber 106X.
Then, in order to form a foamy water discharge, when the air flows into the aeration chamber 106X from the water hole 81X, the air is sucked from the air suction port 134X, and the air is mixed into the water flow to form a foam, and the water is sprayed. Water is discharged from the hole 101X.
(For example, see Non-Patent Document 1)
[0005]
[Non-patent document 1]
TOTO General Catalog 2002-2003 P720-723
[0006]
[Problems to be solved by the invention]
However, the conventionally proposed faucet having a plurality of foamy water discharging functions has the following advantages and disadvantages.
(merit)
By using foam spouting, splashing can be reduced.
By using a plurality of water spouts, the water is spouted over a wide area, and the water spouts evenly on the tableware, and the washing action is easily performed.
(Demerit)
A plurality of water spray holes 101X (6.5 mm in diameter) for discharging water in a foamy manner are provided, but water spray holes (0.7 mm to diameter) capable of obtaining shower water discharge equivalent to those employed in a bathroom or a vanity stand are provided. (Approximately 1.2 mm). Therefore, a sufficient shower feeling could not be obtained.
Also, because the diameter of the water spouting hole is large, even if the water discharge amount is increased, the flow velocity does not increase so much.When washing dishes in the kitchen or removing the dirt around the sink with the force of water, sufficient water force can be obtained. Did not.
Furthermore, even if the water discharge amount is increased, the flow velocity does not increase so much and the water splash hardly occurs. Therefore, the dishes are washed with the water discharge amount more than necessary, and extra water is used. As an improvement measure, for example, it is possible to take a countermeasure by adopting a click mechanism in which the operating force is slightly heavier at a predetermined position so that the single handle does not suddenly reach maximum water discharge.
In addition, in order to form a foamy spout, air is taken into the water and mixed with stirring, so that a certain flow rate is required. However, since the diameter of the sprinkling hole is large, there is a possibility that in a low water pressure area or at a low flow velocity, the flow velocity does not increase, and it is difficult to generate foam water.
Further, from a structural point of view, the air suction port 134X is arranged on the same circumference as the water sprinkling hole 101X, and further, the air suction port 134X extends to the center of the aeration chamber 106X. Tend to be.
[0007]
Therefore, in the present invention, in order to solve the above-described problems, in a shower head that performs foamy shower water discharge, the power of water is adjusted according to the amount of water discharged to improve the cleaning power and the water saving effect, and furthermore, An object of the present invention is to provide a compact shower head capable of obtaining a foamy shower water spout and improving a shower feeling and reducing water splash even if the sprinkling hole has a small diameter.
[0008]
[Means for Solving the Problems]
Therefore, in a shower head provided with an air suction port, the air from the air suction port is mixed into the water, and the water is sprayed from the water spray hole of the water spray plate as foamy water. In the shower head on the upstream side of the water sprinkling hole, in order from the water sprinkling hole side, a net, an air mixing chamber to which air is supplied from the air suction port, and a water flowing hole for flowing water to the air mixing chamber. The diameter of the water hole is smaller than the water hole and the same number as the water hole, and the water hole and the water hole are arranged in the shower head such that their respective central axes coincide with each other. The shower head is characterized in that:
[0009]
This makes it possible to mix air into the water flowing through the water hole to form a foam, and to discharge water from the coaxial water spray hole while maintaining the water discharging force to some extent. For this reason, it is possible to make the shower water discharged from the sprinkler plate into a foam having air mixed therein. Note that the center axis coincides with that in which the water spouting hole is arranged on the axis of the water spouting hole, and also includes the water spouting hole located in the hole area of the water sprinkling hole in plan view. Most preferably, the central axes of the water hole and the watering hole are designed to be on the same line.
Further, according to the present invention, it is possible to provide a shower head capable of improving the shower feeling and reducing the effect of water splash by obtaining a foamy shower water discharge even if the water spray hole has a small water spray hole diameter.
[0010]
According to a second aspect of the present invention, in the shower head according to the first aspect, the water spray hole of the water spray plate has a diameter on an inner side of the water spray plate larger than a diameter on an outer side thereof.
[0011]
Thereby, even if the diameter of the water sprinkling hole is small, it is possible to improve the shower feeling by obtaining a foamy shower water spout, and furthermore, by facilitating the passage of the water from the water sprinkling hole by passing it through the water sprinkling hole. This prevents water from entering the aeration chamber and enables stable foamy spouting.
In other words, if the water flowing from the water hole is not sufficiently received by the water hole and the hot and cold water is difficult to pass through, the amount of water supplied from the water hole is smaller than the amount of water discharged from the water hole. Will increase. For this reason, the hot water gradually stagnates and fills the air mixing chamber forming the foamy hot water, and the hot water cannot be stirred in the air mixing chamber, and the air cannot be mixed into the hot water. It is.
[0012]
A shower according to claim 3 of the present invention, wherein the water sprinkling holes of the water sprinkling plate are formed in the water sprinkling plate so as to be double in the circumferential direction, and the water sprinkling hole diameter on the outer peripheral side is larger than the water sprinkling hole diameter on the inner peripheral side. Head.
[0013]
In this way, the spouting water from the water sprinkling hole on the outer peripheral side has a sense of volume due to the thick streamline, it is hard to splash water, and it has a soft touch. Can be.
And since the water spouting from the water sprinkling hole on the inner peripheral side has a momentum, if the water spouting is only that, water spatters will be generated, but the water spattering from the water sprinkling holes on the outer peripheral side will block the water spatters. It also has the effect of being able to do so. Therefore, it is possible to prevent water spatter while obtaining vigorous spouting.
In other words, it is intended to increase the detergency by the inner water jet with a strong momentum and to reduce the water splash by the outer water jet.
[0014]
According to claim 4 of the present invention, the outer diameter of the sprinkling hole is set in a range of 1 mm to 2.5 mm in diameter, and the water passage hole is set in a range of 0.5 mm to 1 mm in diameter. The shower head according to any one of claims 1 to 3, wherein
[0015]
In this way, by setting each diameter range of the water sprinkling hole and the water passage hole, the power of the water is adjusted according to the amount of water discharged to improve the washing power and the water saving effect, and the diameter of the water sprinkling hole is further reduced. It is possible to provide a compact shower head capable of obtaining a foamy shower water discharge and improving a shower feeling even with a small water spray hole.
In other words, it is possible to obtain spouting water having a shower feeling in appearance, and in spouting water in the range of the sprinkling hole diameter, air is sufficiently mixed in, so that it is possible to make the spouting water of a vibrant foamy shower.
[0016]
According to a fifth aspect of the present invention, the shower head according to the fourth aspect is characterized in that a distance between the water passage hole and the water sprinkling hole is set in a range of 4 to 8 mm.
[0017]
Thereby, in the water discharge in the range of the water sprinkling hole diameter according to claim 4, it is possible to reduce the unstable water spouting such that the water spouting from the water sprinkling hole is disturbed or the air is not sufficiently mixed. In other words, the air is sufficiently mixed in, and the appearance of the shower has a feeling of shower, so that a vibrant foamy shower water can be stably obtained.
[0018]
According to a sixth aspect of the present invention, the mesh is 40 to 80 mesh, and two meshes are arranged at an interval, and the interval is set in a range of 0.5 to 2.5 mm. The shower head according to item 4 or 5 was used.
[0019]
Thereby, it is possible to reduce unstable water discharge such that water discharge from the water spray hole is disturbed, the flow velocity is reduced, and air is not sufficiently mixed.
In particular, in the spouting in the range of the sprinkling hole diameter in claim 4, since the spouting diameter is small, before the water is hit on the net and stirred, the air is sufficiently mixed in the water and the water is spouted from the sprinkling hole. In addition, there is a high possibility that the water may be completely filled into the aeration chamber, or the water discharge direction may be disturbed, resulting in undesired water discharge. However, by arranging the nets as in the present invention, it is possible to form a sufficiently stable foamy spouting water, and to further improve a sufficient spouting momentum.
[0020]
The showerhead according to any one of claims 4 to 6, wherein the number of the water sprinkling holes and the water passing holes is set in a range of 30 to 60. And
[0021]
Thereby, the water discharge velocity from the water hole was made sufficient, and the water discharge from the water hole was made to have sufficient momentum.
If the number of holes is less than 30 in the range of the water passage hole diameter described in claim 4, the pressure loss due to the water passage hole diameter becomes large. Therefore, especially in a shower head in which the water discharge mode is switched, a difference in pressure loss occurs when switching between shower water discharge and another water discharge. If the difference in pressure loss is large, the mixing ratio of hot and cold water will change due to the switching of the water discharge mode.
In the present invention, even in the range of the water passage hole diameter according to the fourth aspect, there is no difference in pressure loss that the temperature of hot and cold water greatly changes at the time of switching of the water discharge mode.
In addition, if the number of holes exceeds 60 in the range of the water passage hole diameter described in claim 4, a sufficient water discharge velocity cannot be secured. Therefore, the momentum of the spouting water is lost, and the feeling of washing is reduced. Further, the flow rate of the foamy shower water cannot be adjusted.
In the present invention, even in the range of the water passage hole diameter according to the fourth aspect, the momentum of the spouting water can be sufficiently ensured, and the flow rate of the foamy shower spouting water can be adjusted, so that the usability can be greatly improved.
[0022]
According to claim 8 of the present invention, the showerhead according to any one of claims 4 to 7, wherein the thickness of the sprinkler plate is set in a range of 1.5 to 6 mm.
[0023]
Thereby, in the range of the watering hole diameter shown in claim 4, the strength of the watering plate can be sufficiently maintained, and the foamy shower water can be discharged. If the thickness of the water spray plate at the portion where the water holes are formed is less than 1.5 mm, the strength becomes weak and the possibility of breakage during use becomes extremely high. On the other hand, if it exceeds 6 mm, it becomes difficult to form a foam very easily, and satisfactory shower water discharge cannot be obtained.
[0024]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described more specifically with reference to the drawings.
FIG. 1 shows a sectional view of the entire faucet.
This faucet A is a single-lever hot-water mixing faucet used especially in a kitchen.
Mixing of hot and cold water and adjustment of the amount of discharged water are performed by operating a single lever 19 by a single lever hot / water mixing cartridge 19 built in the faucet A. Specifically, this is performed by adjusting the degree of overlap of the water passage holes of the movable disk 18a and the fixed disk 18b arranged in the single lever hot / water mixing cartridge 19.
Then, hot and cold water is mixed in the single lever hot and cold water mixing cartridge 19, and hot and cold water is supplied to the shower head B via the flexible hose 16, and discharged to perform one straightened water discharge (normal water discharge). Water is discharged from either the water outlet 131 or the water spray hole 101 for performing a foamy and shower-like water discharge.
As shown in FIG. 3, the water outlet 131 is arranged at the center of the lower surface of the shower head B, and a plurality of water sprinkling holes 101 are arranged around the water outlet 131 in double.
These water discharge modes can be selected by operating the switching handle 122 provided on the shower head B.
FIG. 4A shows a case where water is spouted from the sprinkling hole 101, and FIG. 4B shows a case where water is spouted from the water spout 131.
[0025]
Next, the internal structure of the shower head B will be described more specifically below.
FIG. 2 shows a sectional view of the shower head B.
The appearance of the shower head B is constituted by a plated head cover 1, and the shower head main body 2 is fixed inside the cover 1 with a screw 3 with an O-ring. At this time, the rib provided on the inner surface of the head cover 1 and the rib provided on the upper surface of the shower head main body 2 are engaged with each other so that the shower head main body 2 can be fixed in a specific arrangement direction.
The distal end of the water-passing member 15 inserted from the grip side of the head cover 1 is inserted into the water passage 21 of the shower head main body 2 via an O-ring.
[0026]
Then, as shown in FIG. 2, a spring 4 and a valve seat 5 to which a packing such as an X-ring or an O-ring is attached are sequentially installed inside the shower head main body 2.
The valve seat 5 is attached so as not to rotate with respect to the shower head main body 2. As shown in FIG. 7, the rotation preventing means is prevented from rotating by the engagement between the projection 51 provided on the valve seat 5 and the groove 22 provided on the inner surface of the shower head main body 2 as shown in FIG. I have to.
As shown in FIG. 7, three water passage holes 53 are formed at equal intervals in the valve seat 5. A packing recess 52 is formed on the side surface, and a packing such as an X-ring or an O-ring is fitted into the packing recess 52 to maintain water tightness between the valve seat 5 and the shower head main body 2.
Further, a lower surface 55 of the valve seat 5 is formed in a flat shape, and a water passage hole 53 is arranged on the flat surface.
In addition, 56 is formed into a concave shape by removing the thickness of the resin for molding.
[0027]
The lower surface 55 of the valve seat 5 is installed such that the upper surface 61 of the flow path switching cylinder 6 shown in FIG. Further, three claw portions 62 provided on the upper surface side of the flow path switching cylinder 6 are arranged so as to fit into the grooves 23 or the concave portions 24 provided inside the shower head main body 2.
[0028]
Note that a plate 7 shown in FIG. 9 is used as a retaining means so that the channel switching cylinder 6 does not come off from the shower head main body 2.
With the central opening 73 provided at the center of the plate 7 penetrating the lower side of the flow path switching cylinder 6, the claw 62 provided on the upper surface side of the flow path switching cylinder 6 is further fitted with the plate 7 and the shower. The plate 7 is fixed to the shower head main body 2 so as to be sandwiched between the head main body 2.
At this time, the plate 7 was fixed by fitting two claw portions 71 of the plate 7 into two square holes 25 formed in the shower head main body 2 as shown in FIG.
In addition, a plurality of water passage grooves 72 as shown in FIG. 9 are provided on the inner peripheral surface of the plate 7, and water is passed through the water passage grooves 72 to the water sprinkling holes 101 for discharging foamy showers. By providing the water passage groove 72 in this manner, pressure loss during water passage can be reduced.
[0029]
In the state where the shower head is assembled as described above, the valve seat 5 is always in contact with the flow switching cylinder 6 by receiving the pressing force of the spring 4, and thus the valve seat 5 is provided on the upper surface 61 of the flow switching cylinder 6. The sealing property between the O-ring provided in the packing recess 66 on the outer periphery of the water hole 63 and the lower surface 55 of the valve seat 5 is ensured. Therefore, when the water passage is switched by the rotation of the flow path switching cylinder 6 to discharge water from the water outlet 131 or the water sprinkling hole 101, a problem that hot water leaks from the unselected water discharging port 131 or the water sprinkling hole 101 is reduced. be able to.
[0030]
Next, the sprinkling nozzle 8 shown in FIG. 10 is attached to the shower head main body 2, and at this time, the portions in contact with the shower head main body 2 and the flow path switching cylinder 6 are sealed with packing, as shown in FIG. Then, in order to fix the arrangement position, the projection 83 of the watering nozzle 8 shown in FIG. 10 is arranged in a state of being engaged with the groove 64 of the flow path switching cylinder 6 shown in FIG.
The water spray nozzle 8 is provided with a plurality of water holes 81 smaller than the water holes 101 provided in the water spray plate 10 so as to be arranged on the same axis of the water holes 101.
Then, as shown in FIG. 2, a filter 9 is arranged upstream of the water passage hole 81 so as to remove foreign substances in the water passage from the water passage. Further, the filter 9 is provided with a filter 9 having a plurality of holes smaller than the water passage hole 81 in order to also function to prevent clogging of the water passage hole 81.
[0031]
Next, a watering plate 10 shown in FIG.
At this time, as described above, the water supply hole 81 is installed so as to be located directly above the water spray hole 101 of the water spray plate 10. As positioning means for this purpose, the projection 82 of the watering nozzle 8 and the cutout groove 102 of the watering plate 10 are arranged in an engaged state.
Further, two nets 11 are installed at an interval on the inner side of the water sprinkling hole 101.
Further, the water sprinkling holes 101 are arranged on the double circumference of the water sprinkling plate 10, and the diameter of the water sprinkling holes 101 on the inner peripheral side is smaller than the diameter of the water sprinkling holes 101 on the outer peripheral side. For this reason, the water spray from the water spray hole 101 on the inner peripheral side is secured, and the water discharge from the water spray hole 101 on the outer peripheral side realizes a voluminous water discharge, and the water discharge from the water spray hole 101 on the inner circumferential side is scattered. Can be prevented.
[0032]
Note that the cover 12 is attached to the sprinkling plate 10 when the sprinkling plate 10 is attached. As a means for securely attaching the cover 10 so that the cover 10 does not come off, the projection 121 of the cover 12 is fitted into the cutout groove 102 of the sprinkling plate 10 and connected to the sprinkling nozzle 8 in that state, thereby connecting the sprinkling nozzle 8 and the sprinkling plate 10. The cover 12 is sandwiched between them.
A center opening 105 for passing the flow switching tube 6 is provided at the center of the water spray plate 10, and the projection of the flow switching tube 6 is formed in the cutout groove 103 of the water spray plate 10 when the water spray plate 10 is attached. 65 are fitted. Therefore, the sprinkling plate 10 and the sprinkling nozzle 8 rotate simultaneously with the rotation of the flow path switching cylinder 6.
[0033]
The water outlet 13 is screwed and connected to the channel switching cylinder 6 as a retaining means for the water spray nozzle 8 and the water spray plate 10, and the collar 132 formed in the water outlet 13 is opened at the center of the water spray plate 10. The concave surface 104 formed at 105 is supported.
A rectification net 14 is provided inside the flow switching cylinder 6 to improve rectification, and the water discharge port 13 prevents the rectification net 14 from falling off.
In addition, a tool insertion groove 133 is formed on the flange 132 of the water outlet 13 to securely attach the water outlet 13. By inserting a flat plate or the like into this tool insertion groove 133 and rotating it, the water discharge port 13 can be easily screwed into the flow path switching cylinder 6. Since the water outlet 13 can be removed using the tool insertion groove 133, the filter 9 can be cleaned by removing the water spray plate 10 and the water spray nozzle 8.
Further, an air inlet 134 is formed in the flange 132 of the water outlet 13, and the air mixing chamber in the water spray plate 10 passes through the notch 103 formed in the central opening 105 of the water spray plate 10. Air can be sucked into 106.
[0034]
Next, a description will be given of a structure for switching the water discharge mode.
The water discharging mode can be switched by reciprocating the switching handle 122 provided on the cover 12 by 60 degrees. At this time, the channel switching cylinder 6 also rotates at the same time.
Then, the claw portion 62 formed on the flow path switching cylinder 6 first escapes from the concave portion 24 of the shower head main body, moves along the groove 23 in a state where it is pushed inward and is bent, and is fitted into another concave portion 24. Put in.
When the claw portion 62 is fitted in the concave portion 24, it has a water discharge form of either shower water discharge or one rectified water discharge, and the claw portion 62 of the flow path switching cylinder 6 is located in the groove 23. Is a state during the switching of the water discharge mode. That is, the arrangement interval of the concave portions 24 (the same angle as the operation angle of the switching handle 122 of 60 degrees) is one half of the arrangement interval (120 degrees) of the water passage holes 53 and 63. Therefore, when the claw portion 62 moves from the concave portion 24 to the next adjacent concave portion 24, the water discharge mode is switched.
[0035]
Note that, in the case of a specification in which the water discharge is switched by restricting the rotation as described above and the water discharge is switched by moving between the determined angles, as shown in FIG. 24 may be connected by a groove 23.
As another example of the water discharge switching, there is a specification in which the water discharge form is repeatedly switched while rotating the sprinkling plate 10. In this case, the groove 23 is connected 360 degrees as shown in FIG. 6C so that the rotation of the claw 62 is not restricted. Then, the concave portion 24 may be arranged at a predetermined angle (60 degrees) as the target.
When the rotation control is not provided, as shown in FIGS. 2 and 3, the cover 12 having a non-slip surface on the outer periphery may be formed as a switching handle without forming the switching handle 122 in a protruding shape. .
[0036]
Next, formation of a foamy shower that discharges water from the water sprinkling hole 101 will be described.
In order to improve the feeling of showering, as compared with the conventional shower head BX shown in FIGS. 14 and 15, the watering holes 101 of the watering plate are made as small as possible, and the number of watering holes is also increased as much as possible. We succeeded in obtaining foamy spouting water in the range of 1.0 mm to 2.5 mm in diameter.
In order to obtain a shower feeling similar to that of a shower in a bathroom or a vanity table, and to make a foamy shower water discharge, the following matters are important. Therefore, in order to obtain a better foamy shower water discharge and a shower sensation, it is necessary to appropriately correlate the dimensions and arrangement.
(1) Reduce the diameter of the watering holes 101 and increase the number of holes
(2) Ensuring the flow velocity from the water hole 81
(3) To sufficiently mix air in the aeration chamber 106
(4) Spraying water from the water sprinkling hole 101 with a small diameter in a foamed state
(5) Preventing the aeration chamber 106 from being filled with water before the water flowing out of the water holes 81 is foamed and discharged from the water holes 101.
[0037]
Further, in the shower head B provided with the water discharge switching mechanism as shown in FIGS.
(1) The pressure loss in the shower head B tends to increase when the shower water is discharged by reducing the diameter of the water passage hole 81, but the normal water discharge from the water discharge port 131 and the shower water discharge from the water spray hole 101 are likely to occur. The difference between the pressure loss and the pressure must not be large.
The reason will be described below.
If the pressure loss in the water flow path is large, water flow becomes difficult.
While the water pressure on the water supply side is about 0.2 MPa, the water pressure on the hot water supply side is only about 0.05 MPa. Such a difference occurs because the water passes through a water heater, and the water pressure further decreases when the water passes through an electric water heater or the like.
Therefore, in particular, since the water pressure on the hot water supply side is smaller than the water pressure on the water supply side, the water pressure is easily affected by the pressure loss in the water flow path, and the hot water is difficult to flow.
On the other hand, in the shower head B equipped with the water discharge switching mechanism, the water passage of the shower water is complicated, and thus the pressure loss tends to be larger than that of the water passage of the normal water discharge.
Therefore, in a shower head having a large difference between the pressure loss in the shower water passage and the pressure loss in the normal water passage, when hot water is mixed at an appropriate temperature and used as the shower water, the normal water discharge is performed. When the water discharge mode is switched, the amount of hot water that has been more affected by the pressure loss relatively increases, so that the temperature of the discharged hot water increases.
Further, if the mode is switched to the shower water discharge when the water is normally used for the water discharge, the amount of the hot water which is more susceptible to the pressure loss is relatively reduced, so that the temperature of the hot water is lowered.
It is necessary to minimize the difference in pressure loss as much as possible in order to reduce the temperature change of hot and cold water caused by such water discharge switching.
[0038]
In view of the above, it is preferable to set the dimensions of each component as follows in order to discharge water with a foamy shower feeling.
First, it is preferable that the water sprinkling hole 101 (diameter on the outer side) is set in a range of 1.0 mm to 2.5 mm in diameter.
In particular, by changing the hole diameter of the water sprinkling hole 101 between the outer periphery and the inner periphery, and making the outer hole diameter larger than the inner peripheral hole diameter, the outer periphery is relatively thick and soft water discharge, and the inner periphery is thin and relatively strong water discharge. Is preferred. With this hail, water discharge from the outer peripheral hole reduces water splash, and also plays a role of preventing water splash from the inner peripheral hole with vigorous water discharge, and water discharge from the inner peripheral hole is a vigorous water discharge. It plays a role in improving cleanability.
Specifically, the water sprinkling holes 101 are arranged 24 pieces in two rounds, the outer circumference is 2.1 mm in diameter, and the inner circumference is 1.5 mm in diameter. The reason why the diameter of the outer peripheral hole is not set to 2.0 mm in diameter but to 2.1 mm in diameter is to make the water discharge more voluminous. In addition, the number of holes of the water sprinkling holes 101 is set to 48 in total, but it is preferable to change the number according to the hole diameter, so that the foaming shower feeling and the flow rate can be adjusted to adjust the momentum of water spouting. The number is preferably 20 to 100, and more preferably 30 to 60. In particular, by setting the number of water sprinkling holes 101 to 30 to 60, a shower feeling can be obtained, the shower head B (water sprinkling plate 10) can be made compact, and a water discharge switching means is provided. Therefore, the change in hot water temperature can be further reduced since there is no large difference in pressure loss at the time of water discharge switching.
[0039]
In addition, although the flow rate increases as the total area of the water holes 81 of the watering nozzle 8 decreases, the difference between the pressure loss and the normal water discharge increases as the pressure loss increases. Was found.
That is, it is preferable to set the water passage hole 81 in a range of 0.5 mm to 1.0 mm in diameter.
With respect to the water passage hole 81, if the diameter is less than 0.5 mm, the water has a momentum, but the water discharge diameter is smaller than the water sprinkle hole diameter, and the shower lacks a sense of volume. Therefore, comfort is lacking.
Further, when the diameter exceeds 1.0 mm, the amount of water discharged from the water passage hole 81 increases, and therefore, in the water spray hole 101 having the above-described hole diameter, before the water is discharged from the water spray hole 101, the air mixing chamber 106 However, there is a problem that the water stays and does not foam.
Further, it is most preferable that the water passage holes 81 have a diameter of 0.7 mm from the viewpoint of water force and foaming, and furthermore, in consideration of a shower feeling and a pressure loss, 48 water holes are arranged in the same number as the water spray holes 101. Is preferred.
[0040]
Further, the water discharge state also changes due to a change in the distance L from the water passage hole 81 of the water spray nozzle 8 to the water spray hole 101 of the water spray plate 10. The smaller the distance L from the water supply hole 81 of the watering nozzle 8 to the watering hole 101 of the watering plate 10 is, the higher the flow velocity is, but the spouting is in a disturbed state. Will decrease. Therefore, it is preferable to set it in the range of 4 to 8 mm.
Then, in the range of the hole diameter of the above-mentioned water sprinkling hole 101 of 1.5 mm to 2.1 mm, the most stable water discharge is obtained in an optimum foam state when the distance L is around 5 mm.
[0041]
The water spouting hole 101 of the water sprinkling plate 10 has a higher spout than the water spouting 81 because the water spouting from the sprinkling nozzle 8 is disturbed by the net 11, and it is necessary to pass the foamed spouting while mixing air. It is preferable to make it larger.
However, if it is too large, the water discharged from the water sprinkling hole 101 becomes thick and the flow velocity decreases, so that the shower feeling and the detergency decrease.
That is, as shown in FIG. 7 (b), by increasing the diameter of the inside of the water sprinkling hole 101, the water flowing from the water sprinkling hole 81 can be sufficiently received by the water sprinkling hole 101 and can be passed through the hole. In addition, by reducing the diameter on the outer side, it is possible to obtain water discharge at a sufficient flow rate with a water discharge diameter having a shower feeling. Therefore, for example, as a specific shape, a conical watering hole 101 may be used. When the inside diameter and the outside diameter of the water sprinkling hole 101 are changed in this way, the hole diameter of the water sprinkling hole 101 indicates the outside diameter. When the outer diameter was 1.5 mm and the diameter was 2.1 mm, the inner diameter was 2.6 mm.
[0042]
In addition, it is preferable to select and install a net that provides optimal foam-like water discharge for the hole diameters of the watering nozzle and the watering plate. Therefore, as shown in FIG. 5, two nets 11 are installed inside the watering plate 10 at intervals to form foam.
Although the number of the nets 11 is one, if the number is one, the force of the water discharge becomes strong, and the water discharge becomes thin, lacking a sense of volume. It is good to use two.
In this embodiment, the mesh 11 is 40 to 80 mesh, and two meshes are arranged at an interval S, and the interval S is preferably set in a range of 0.5 to 2.5 mm. In particular, it is preferable to set the wire diameter of the net 11 in the range of 0.12 to 0.18 mm to make the wire diameter smaller.
In the case of 80 mesh, the interval S is set as narrow as 0.5 mm, and in the case of 40 mesh, the interval S is set as wide as 2.5 mm. In other words, the more the number of meshes is increased, the narrower the interval S is, the more stable foamy water discharge can be formed.
If the number of meshes exceeds 80, the pressure loss increases, and even if the interval is reduced, satisfactory foam will not be obtained. And, when the water supply pressure is low, the foam is less likely to be foamed. If the number of meshes is less than 50, the water discharge becomes unstable and disturbed.
The gap S has a role of stabilizing water discharge. However, if the distance of the gap S is smaller than 0.5 mm, the water discharge diameter becomes small, the water discharge is disturbed, and the appearance of the water discharge state deteriorates. Further, under the conditions of the present embodiment, a foam state is obtained at the gap S2.5 mm, but when the gap is larger than that, the foaming is further reduced, the flow velocity is decreased, and it cannot be said that the water is discharged satisfactorily.
When the hole diameter of the water spray hole 101, the hole diameter of the water hole 81, and the distance L from the water hole 81 of the water spray nozzle 8 to the water hole 101 of the water spray plate 10, the gap S is about 2 mm. is there. This is because the smaller the size is, the more easily the water discharge becomes turbulent, and the larger the size becomes, the less the foam becomes.
[0043]
Further, as an element that affects water discharge, such as the distance L and the gap S, the plate thickness T of the sprinkling plate 10 can be cited.
This plate thickness T corresponds to the depth of the water sprinkling hole 101 and has an effect on the water discharge state.
Although the optimum value of the plate thickness T also varies depending on the watering hole diameter, the plate thickness T is preferably set to 1.5 to 6 mm with respect to the watering hole diameter. More preferably, it is preferably 1.5 to 3 mm.
Under the conditions of the present embodiment, if the plate thickness T is smaller than 1.5 mm, the plate thickness becomes extremely thin, and the strength becomes weak, which is not preferable. In addition, as the plate thickness T increases, the hole depth of the water sprinkling holes 101 increases, and the pressure loss increases. Therefore, it is difficult to form a foam, and when the plate thickness T exceeds 6 mm, it does not completely form a foam. In particular, when the diameter of the sprinkling hole 101 is smaller, it is preferable to set the diameter so as not to exceed 3 mm.
Therefore, it is particularly preferable to set the plate thickness T to 2 mm. By setting the plate thickness T to a sufficient value, it is possible to secure sufficient foam-like water discharge without affecting the thickness, and there is no problem in strength.
[0044]
As described above, in order to obtain the optimum foam spouting with the required sprinkling hole diameter 101, it is preferable to take the optimum values of the water passing hole 81 of the watering nozzle 8, the distance L, and the gap S between the nets.
[0045]
【The invention's effect】
The foam shower of the present invention has a structure as described above, and in a shower head that performs foam shower water discharge, the power of water is adjusted according to the amount of water discharged to improve the cleaning power and the water saving effect. In addition, it is possible to provide a compact shower head capable of obtaining a foamy shower water discharge and improving a shower feeling even if the water spray hole has a small water spray hole diameter.
[0046]
That is, the shower water was thinner and more vibrant than the conventional foam shower. In addition, it is a vigorous shower due to the foam spouting water mixed with air, but the shower spouting has a soft feel and has both water splash reduction effect and water saving effect. According to the present invention, a soft touch and reduced water splash due to foam water discharge, a water saving effect due to vigorous water discharge, and an improvement in shower feeling due to fine water discharge are achieved.
[Brief description of the drawings]
FIG. 1 is a sectional view of a single-lever hot-water mixing tap to which a shower head according to the present invention is applied.
FIG. 2 is a cross-sectional view of the shower head of FIG.
FIG. 3 is a view of the shower head of FIG. 2 as viewed from a sprinkling hole side.
FIG. 4 is a diagram illustrating a switching state of a water discharge mode in the shower head of FIG. 2;
FIG. 5 is a partial sectional view showing a positional relationship between a water passage hole and a water spray hole in the shower head of FIG.
FIG. 6 is a shower head main body constituting the shower head of FIG. 2;
FIG. 7 is a valve seat constituting the shower head of FIG. 2;
FIG. 8 is a flow path switching cylinder constituting the shower head of FIG. 2;
FIG. 9 is a plate constituting the shower head of FIG. 2;
FIG. 10 is a watering nozzle constituting the shower head of FIG. 2;
FIG. 11 is a cover constituting the shower head of FIG. 2;
FIG. 12 is a sprinkler plate constituting the shower head of FIG. 2;
FIG. 13 shows a water discharge port constituting the shower head of FIG. 2;
FIG. 14 is a conventional shower head.
FIG. 15 is a view of the conventional shower head (FIG. 14) as viewed from a water spray hole side.
[Explanation of symbols]
A water faucet (single lever hot water mixing faucet)
B shower head
1 Head cover
2 Shower head body
21 Waterway
22 grooves
23 grooves
24 recess
25 square hole
26 Screw hole
27 Packing recess
3 Screw with O-ring
4 Spring
5 Valve seat
51 protrusion
52 Packing recess
53 water hole
54 Top
55 bottom
56
6 Channel switching cylinder
61 Top
62 Claw
63 water hole
64 groove
65 protrusion
66 Packing recess
67 Water passage recess
68 Packing recess
7 plate
71 Claw
72 Water ditches
73 Central opening
8 Watering nozzle
81 Water hole
82 Projection
83 projection
84 Central opening
9 Filter
10 Watering board
101 watering hole
102 Notch groove
103 Notch groove
104 concave
105 Central opening
106 Air mixing room
11 net
11a chewing material
12 Cover
121 protrusion
122 Switching handle
123 center opening
13 spout
131 spout
132 Collar
133 Tool insertion groove
134 air inlet
14 Rectifier network
15 Water passing members
16 Flexible hose
17 Water supply pipe, hot water supply pipe
18 Single lever hot and cold water mixing cartridge
18a movable disk
18b fixed disk
19 Single lever

Claims (8)

In the shower head which has an air suction port and mixes air from the air suction port into water and discharges water from a water spray hole of a water spray plate as foamy water discharge,
In the shower head upstream of the sprinkling hole of the sprinkling plate, in order from the sprinkling hole side, a net, an air mixing chamber to which air is supplied from the air suction port, and water flow for flowing water to the air mixing chamber. And a hole,
The diameter of this water hole is smaller than the water hole and the same number as the water hole,
Further, the water spray hole and the water passage hole are arranged on the shower head such that their respective central axes coincide with each other. 2. The shower head according to claim 1, wherein a diameter of the water spray hole of the water spray plate is larger on the inner side than on the outer side of the water spray plate. 3. A shower head, wherein the water sprinkling holes of the water sprinkling plate are formed in the water sprinkling plate so as to be double in the circumferential direction, and the diameter of the water sprinkling holes on the outer peripheral side is larger than the diameter of the water sprinkling holes on the inner peripheral side. The outer diameter of the sprinkling hole is set in a range of 1 mm to 2.5 mm in diameter, and the water hole is set in a range of 0.5 mm to 1 mm in diameter. The showerhead according to any one of claims 1 to 3. The showerhead according to claim 4, wherein the distance between the water hole and the water hole is set in a range of 4 to 8 mm. The shower according to claim 4 or 5, wherein the mesh is 40 to 80 mesh and two meshes are arranged at an interval, and the interval is set in a range of 0.5 to 2.5 mm. head. The showerhead according to any one of claims 4 to 6, wherein the number of the water holes and the water holes is set in a range of 30 to 60. The showerhead according to any one of claims 4 to 7, wherein a thickness of the water spray plate is set in a range of 1.5 to 6 mm.

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