JP2006015239A - Air mixing jet type flow fitting and check valve provided in air mixing jet mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air mixing jet type flow fitting and a check valve with outstanding durability and provided in an air mixing jet mechanism which have very small intake resistance and allow a large amount of outside air to be sucked thereby to enable an air-mixed jet containing large amount of air to be formed, and to cause no vibration nor noise. <P>SOLUTION: In this air mixing jet type flow fitting in a water passage formed between a discharge part and a water supply part, provided with the air mixing jet mechanism, a structure is employed in a ventilation path so that the ventilation path is opened by the pressure of pressurized water supplied to an injection nozzle and that the ventilation path is closed when the pressure of the pressurized water supplied to the injection nozzle decreases and/or the air mixing part side pressure increases. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a check valve provided in an air-mixing jet mechanism such as a shower nozzle provided in a bathroom or the like, a vacuum forming device, a dredge device, or the like.

As an example of the mixed jet type flow feeder, for example, there is a shower nozzle that is provided in the bathroom with an mixed jet mechanism inside (for example, Patent Document 1).
The shower nozzle provided with this air-mixing jet mechanism injects pressure water from the water supply hose between the water supply hose and the water sprinkling part from the small-diameter injection nozzle to the air-fuel mixture part having a larger diameter than this, It is configured to suck the gas from the air passage into the air-mixing portion with the formed negative pressure, and the water-saving effect is attracting attention by mixing air.

In the shower nozzle provided with the above-described air-mixing jet mechanism, since the air passage communicating with the air-mixing part is always in the outward communication state, water is sprayed from the air-mixing part when water supply from the water supply hose is stopped. There was a problem that water remaining between the two parts leaked out from the air passage.
In particular, in the case where a water stop cock is provided on the side of the water sprinkling part from the air-mixing part, such as a shower nozzle of a care product, there is a problem that water is jetted from the air passage by water pressure at the time of water stoppage.
In view of this, a ball spring type check valve is provided in the air passage to prevent water leakage at the time of water stoppage using the check valve (for example, Patent Document 2).
Japanese Utility Model Publication No. 5-26151 Japanese Patent Laid-Open No. 2002-96000

In the check valve formed in the air passage of the shower nozzle provided with the air-mixing jet mechanism, the ball is sucked at a negative pressure against the valve closing pressing force of the spring pressing the ball in the valve closing direction. There is a problem that the valve must be moved and opened, and the resistance to the valve is high due to the strong pressure for closing the valve.
Further, since the ball that is being opened is in an unstable state in which the intake pressure and the pressing force for closing the spring are balanced, the ball is likely to fluctuate. There is also a problem that chattering occurs and this causes vibration and noise of the shower nozzle.
Further, when the ball chatters, there is a problem that the ball and the peripheral wall portion in which the ball is stored are quickly worn, and the durability, and consequently the durability of the shower nozzle, is lowered.

The present invention has been proposed in view of the above-described problems, and it is possible to form an air-fuel mixture jet with a very small intake resistance by sucking a large amount of outside air and having no vibration and noise, and having excellent durability. An object of the present invention is to provide a check valve provided in an air jet type flow feeder and an air-mixing jet mechanism.

In order to achieve the above-mentioned object, the air-fueled jet type flow tool according to the present invention has a discharge part at one end and a water supply part at the other end, and supplies pressure water from the water supply part from a small-diameter injection nozzle. A mixed-air jet mechanism configured to inject into a large-diameter mixed portion to form a negative pressure in the mixed-portion portion and to suck a gas from the air passage with a negative pressure formed in the mixed-portion portion is referred to as a discharge portion. In the mixed-jet jet delivery device provided in the water flow path formed between the water supply unit, the pressure supplied to the injection nozzle by opening the air flow path with the pressure water pressure supplied to the injection nozzle in the air flow path The main feature is the provision of a check valve configured to close the air passage when the pressure of water becomes low and / or the pressure on the air-mixing part side becomes high.

In the mixed-air jet type flow tool according to the present invention, the check valve includes a valve box and a valve body that slides in the valve box, and forms a ventilation path across the valve box and the valve body. A pressure receiving surface is formed on the water supply portion side portion of the injection nozzle, and an urging means for pressing the valve body in a direction to close the air passage against the pressure received by the pressure receiving surface is provided.

In the mixed jet type flow feeder, the valve body is formed integrally with the pressure receiving surface part and the part that opens and closes the air passage, and the valve body is formed separately from the pressure receiving surface part and the part that opens and closes the air passage. In addition, the mixed air jet type flow tool is a shower nozzle, or the mixed gas jet type flow tool is a suction flow device that sucks and flows a solid mass with the mixed gas jet. Is.

Further, in the check valve provided in the air-fuel mixture jet mechanism according to the present invention, the pressure water from the water supply part is injected from the small-diameter injection nozzle to the air-fuel mixture part having a larger diameter than this, and negative pressure is applied to the air-fuel mixture part. A check valve provided in an air-mixing jet mechanism configured to suck gas from the air passage into the air-mixing portion with this negative pressure, and comprising a valve box and a valve body that slides on the valve box A pressure receiving surface is formed on the water supply portion side portion of the injection nozzle, and the valve body is closed in a direction to close the air passage formed between the valve box and the valve body against the pressure received by the pressure receiving surface. The main feature is that an urging means for pressing is provided.

Furthermore, in the check valve provided in the mixed gas jet mechanism according to the present invention, the suction passage is formed so that the suction direction of the gas to the mixed gas part is sucked at an acute angle with respect to the jet flow of the mixed gas part. It is a feature.

According to the present invention, the air passage is opened in the air passage by the pressure water supplied to the injection nozzle, the pressure water supplied to the injection nozzle is reduced, and / or the pressure on the air-mixing portion side is reduced. A check valve configured to close the air passage when it becomes high and such a check valve are provided in the water flow passage, so that when the pressure water is supplied, the air passage is always kept open. The
Thereby, there is an advantage that a large amount of outside air can be sucked without resistance as in the ball spring type to form an air-fuel mixture jet with a large amount of air, and the water saving effect can be improved.

In addition, since the check valve is constantly pressed in the direction in which the air passage opens by the pressure of the pressure water supplied, the ball being opened is in a state where the intake pressure is balanced with the closing pressure of the spring There is no so-called chattering that the ball fluctuates and the ball repeatedly collides with the air passage etc. unlike the conventional ball spring type in which the ball is unstable, so there is no vibration or noise of the shower nozzle and durability There is also an advantage that can be greatly improved.

Preferred embodiments of a shower nozzle with a check valve according to the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view of a bathroom shower head, in which reference numeral 1 denotes the shower head as a whole.
The shower head 1 for a bathroom is provided with a water supply part 4 provided with an air-mixing jet mechanism 3 at the lower end of a cylindrical main body 2, and a water spray part (discharge part) 5 is formed at the upper end part. 4 and the water sprinkling part 5 are communicated with each other through a flowing water channel 6 formed in the cylindrical main body 2.

The cylindrical main body 2 is formed of a synthetic resin in a gentle arc shape, and a bent pipe portion 7 is formed near the upper end. A large number of small water spray holes 8 are formed at the open end of the bent pipe portion 7. The perforated diffusion water discharge plate 9 is attached to form the water sprinkling part 5.
The water supply unit 4 is formed by connecting a lower end portion of the tubular main body 2 and an end portion of a water supply hose 10 connected to a tap faucet or a hot water supply portion of a water heater (not shown). The mixed gas jet mechanism 3 is formed.

As shown in FIGS. 2 and 3, the air-mixing jet mechanism 3 is provided with a valve body 13 of a check valve 12 slidably provided in a cylindrical valve box 11 formed by the water supply unit 4. A small-diameter injection nozzle 14 and a straight tubular air-mixing portion 15 larger in diameter than the injection nozzle 14 are disposed concentrically on the valve body 13, and a valve is provided on the injection nozzle 14 side portion of the air-mixing portion 15. The body side intake passage 16 is formed.
The valve-body-side intake passage 16 is narrowed at the intermediate portion of the valve body 13 from the lower portion of the tapered peripheral surface 17 toward the air-mixing portion 15 with respect to the injection nozzle 14 and the axis 18 of the air-mixing portion 15. It is formed to have an acute angle θ.
Thus, when the valve body side intake passage 16 is formed at an acute angle θ with respect to the injection nozzle 14 and the axis 18 of the air mixture portion 15, the air sucked from the valve body side intake passage 16 into the air mixture portion 15 Generation of wind noise is prevented as much as possible, and the air-fuel mixture jet mechanism 3 can be made quiet.

The check valve 12 includes a valve body 13, a valve box 11 that houses the valve body 13 so as to be movable up and down, and a coil spring (biasing means) 19 that presses and biases the valve body 13 downward.
The valve body 13 has the above-described mixed-air jet mechanism 3 in the inside thereof, the above-mentioned constricted tapered peripheral surface 17 is formed in an intermediate portion, and a large-diameter cylindrical portion 20 is formed in the upper portion thereof, A small-diameter cylindrical portion 21 is formed in the lower portion.
And the lower end surface part of the valve body 13 is the pressure receiving surface 22 which receives the pressure water from the water supply hose 10 on the outer periphery of the injection nozzle 14.
In the figure, reference numeral 23 denotes a sealing O-ring, and reference numeral 24 denotes a plate for receiving the end of the coil spring 19.

The valve box 11 that houses the valve body 13 includes a small-diameter cylindrical portion 25 in which the small-diameter cylindrical portion 21 of the valve body 13 is slidably fitted up and down inside a portion to which the water supply hose 10 is connected, and a valve A tapered peripheral surface portion 26 that abuts the tapered peripheral surface 17 of the body 13 on the surface and a large diameter cylindrical portion 27 in which the large diameter cylindrical portion 20 of the valve body 13 is slidably fitted up and down are provided from the water supply portion 4. It forms in order toward the watering part 5 side.
A valve box side intake passage 28 is formed in the taper peripheral surface portion 26, and the valve box side intake passage 28 is configured such that the tapered peripheral surface 17 of the valve body 13 contacts the taper peripheral surface portion 26 of the valve box 11. In this case, the position where the valve body side intake passage 16 is not communicated, that is, the height position is made different.

Next, the operation of the check valve 12 configured as described above will be described.
First, a water supply hose 10 is connected to the water supply unit 4 of the valve body 13, and hot water pressurized from the water supply hose 10 is supplied to the air-mixing jet mechanism 3.
At this time, the valve body 13 of the check valve 12 housed in the mixed air jet mechanism 3 is pressed downward by the coil spring 19 as shown in FIG. 4, and the tapered peripheral surface 17 of the valve body 13 is the valve box. 11, the valve box side intake passage 28 and the valve body side air supply passage 16 having different heights are in a state of being cut off.

Then, when pressurized hot water is supplied to the air-fuel mixture jet mechanism 3, the pressure acts on the pressure receiving surface 22 formed at the lower end surface portion of the valve body 13, and the valve body 13 is pushed by the coil spring 19. The valve body 13 is raised against the pressure.
When the valve body 13 is lifted in this way, a clearance S is formed between the tapered peripheral surface 17 of the valve body 13 and the tapered peripheral surface portion 26 of the valve box 11 as shown in FIG. The passage 16 and the valve box side passage 28 communicate with each other to form an intake passage 29.
On the other hand, the hot water supplied to the mixed-air jet mechanism 3 is jetted from the small-diameter injection nozzle 14 to the straight-tube mixed-portion 15 having a diameter larger than that of the injection nozzle 14 and this jet flow is mixed with the mixed-flow unit 15. When the pressure spreads, a negative pressure due to cavitation is formed at the portion of the air-mixing portion 15 on the injection nozzle 14 side.

Outside air is sucked from the intake passage 29 by the negative pressure formed in the air-mixing portion 15 and mixed with the jet flow of the air-mixing portion 15 to form an air-mixed jet flow.
When the mixed jet flow is sent from the flowing water channel 6 in the shower head 1, a large number of air bubbles mixed in the mixed jet flow when colliding with the bent pipe portion 7 are further subdivided. The water is discharged as a shower water flow gentle to the skin containing a large amount of micro bubbles from the diffusion water discharge plate 9 of the water spray part (discharge part) 5 having the small water spray holes 8 formed therein.

Next, in order to stop the shower water flow, when the cock of the hot water supply device (not shown) is closed and the supply of pressurized hot water from the water supply hose 10 to the mixed-air jet mechanism 3 is stopped, this supply stop Accordingly, the pressure acting on the pressure receiving surface 22 formed on the lower end surface portion of the valve body 13 is reduced.
The valve element 13 is lowered by the pressing force of the coil spring 19 due to a decrease in pressure acting on the pressure receiving surface 22.
When the valve body 13 is lowered and the tapered peripheral surface 17 of the valve body 13 and the tapered peripheral surface portion 26 of the valve box 11 are brought into close contact with each other, and there is no gap S as shown in FIG. The body side intake passage 16 and the valve box side passage 28 are divided.
As a result, the water that has formed the mixed air jet flow remaining in the air mixing section 15 and the flowing water passage 6 in the shower head 1 from the valve body side intake passage 16 leaks to the outside through the blocked intake passage 29. Is prevented.

On the other hand, in the above example, the pressure acting on the pressure receiving surface 22 by closing the cock of the hot water supply device (not shown) and stopping the supply of hot water pressurized from the water supply hose 10 to the mixed-air jet mechanism 3 is stopped. However, in the check valve 12 of the present invention, for some reason (for example, clogging of the small holes 8 for watering or the discharge part (watering part) 5). This also works when the pressure on the discharge part 5 side becomes high due to an open / close valve provided on the side portion and the open / close valve is closed.
That is, if the pressure on the discharge unit 5 side becomes higher than the mixed gas jet mechanism 3 due to clogging of the small holes 8 for watering or closing of the opening / closing valve provided on the discharge unit 5 side, the pressure on the discharge unit 5 side is increased. And the pressure acting on the pressure receiving surface 22 is reduced.
Then, the valve body 13 is lowered by the pressing force of the coil spring 19, the tapered peripheral surface 17 of the valve body 13 and the tapered peripheral surface portion 26 of the valve box 11 are brought into close contact with each other, and the intake passage 29 is in the valve body side intake as described above. The water which was divided into the passage 16 and the valve box side passage 28 and formed the mixed jet flow remaining in the mixed portion 15 and the flowing water passage 6 in the shower head 1 from the valve body side intake passage 16 is blocked. Leakage to the outside is prevented by the intake passage 29.

In the above embodiment, the valve body 13 of the check valve 12 is formed integrally with the pressure receiving surface 22 part and the air-mixing part 15 part, but these are divided as shown in FIGS. Thus, the valve body 13 can be formed.
That is, as shown in FIG. 6, the injection nozzle 14 is formed on the pressure receiving surface 22 portion of the valve body 13, the tapered peripheral surface 17 is formed on the air-mixing portion 15, and the injection is in contact with the bottom of the tapered peripheral surface 17. A valve body side intake passage 16 is formed on the peripheral surface portion of the nozzle 14.
Incidentally, in the case of this example, the valve body side intake passage 16 can also be formed at the bottom of the tapered peripheral surface 17.

In the check valve 12 of this example, when the pressure of the hot water pressurized from the water supply hose 10 acts on the pressure receiving surface 22 as shown in FIG. 7, the pressure receiving surface 22 portion and the air-mixing portion 15 portion are integrated with each other by the pressure. And rises against the pressing force of the coil spring 19 to form a clearance S between the tapered peripheral surface 17 and the tapered peripheral surface portion 26 of the valve box 11, so that the valve body side intake passage 16 and the The point at which the intake passage 29 is formed by communicating with the valve box side intake passage 28, the pressure acting on the pressure receiving surface 22 decreases, or the pressure on the discharge portion (sprinkling portion) 5 side increases, and the discharge portion The action of blocking the intake passage 29 when the differential pressure between the pressure on the 5 side and the pressure on the pressure receiving surface 22 side is the same as in the above embodiment.

Moreover, in the said embodiment, although the example which mounted | wore with the non-return valve 13 was demonstrated, it is not restricted to such a thing, In order to flow the fluid and powder which contain a liquid and a solid lump Needless to say, it can be used as a check valve for an air-jet pump used for cleaning or an air-jet pump used for washing bags and articles.

It is a perspective view of the shower nozzle part for bathrooms which equipped with the check valve concerning the present invention. It is a disassembled perspective view of the non-return valve concerning this invention. It is a vertical front view of the state which decomposed | disassembled the non-return valve concerning this invention. It is a vertical front view of the check valve concerning the present invention. It is operation | movement explanatory drawing of the non-return valve concerning this invention. It is a vertical side view which shows another form of the non-return valve concerning this invention. It is operation | movement explanatory drawing in another form of the non-return valve concerning this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Bathroom shower nozzle 2 ... Cylindrical main body 3 ... Mixed air jet mechanism 4 ... Water supply part 5 ... Watering part (discharge part)
6 ... Water channel 10 ... Water supply hose 11 ... Valve box 12 ... Check valve 13 ... Valve element 14 ... Injection nozzle 15 ... Air mixture 16 ... Valve side Intake passage 17 ... tapered peripheral surface 18 ... shaft core 19 ... coil spring (biasing means)
20.21 ... Cylindrical portion 25 ... Small diameter cylindrical portion 26 ... Tapered peripheral surface portion 27 ... Large diameter cylindrical portion 28 ... Valve box side intake passage 29 ... Intake passage S ... Clearance θ ... Acute angle

Claims (8)

It has a discharge part at one end and a water supply part at the other end, and injects pressure water from the water supply part from a small diameter injection nozzle to an air mixture part having a larger diameter than this to form a negative pressure in the air mixture part, A mixed-jet jet transport system in which a mixed-jet mechanism configured to suck gas from the intake passage with a negative pressure formed in the mixed-portion section is provided in a flow channel formed between the discharge section and the water supply section. In the apparatus, the intake passage is opened in the intake passage by the pressure water pressure supplied to the injection nozzle, the pressure water pressure supplied to the injection nozzle is lowered, and / or the pressure on the air-fuel mixture side is increased. An air-mixing jet-type flow feeder characterized by the provision of a check valve that is sometimes configured to close the intake passage. The check valve includes a valve box and a valve body that slides on the valve box, forms an intake passage across the valve box and the valve body, and forms a pressure receiving surface on a water supply portion side portion of the injection nozzle. 2. The air-jet flow feeder according to claim 1, further comprising an urging means for pressing the valve body in a direction to close the intake passage against the pressure received by the pressure receiving surface. The air-fueled jet flow feeder according to claim 2, wherein the valve body is integrally formed with a pressure receiving surface portion and a portion that opens and closes the intake passage. The mixed air jet type flow feeding device according to claim 2, wherein the valve body is formed separately from a pressure receiving surface portion and a portion for opening and closing the intake passage. The mixed-air jet type flow tool according to claim 1, wherein the mixed-air jet type flow tool is a shower nozzle. The mixed-air jet type flow tool according to claim 1, wherein the mixed-air type flow tool is a suction flow tool that sucks and sends a solid mass with a mixed gas jet. Pressure water from the water supply section is sprayed from the small diameter injection nozzle to the larger diameter mixture section to form a negative pressure in the mixture section, and gas is sucked from the intake passage to the mixture section by this negative pressure. A check valve provided in the air-fuel mixture jet mechanism configured as described above, comprising a valve box and a valve body that slides on the valve box, forming a pressure receiving surface on the water supply portion side portion of the injection nozzle, and a pressure receiving surface An air-mixing jet mechanism comprising an urging means that presses the valve body in a direction to close the intake passage formed between the valve box and the valve body against the pressure received by Check valve provided. 8. The check provided in the mixed-air jet mechanism according to claim 7, wherein a suction passage is formed so that the suction direction of the gas to the mixed-portion is sucked at an acute angle with respect to the jet flow of the mixed-portion. valve.

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