JPH05245354A - Air-water ejector - Google Patents

Abstract

PURPOSE:To increase quantity of bubbles in an air-water ejector which spouts pressure water together with bubbles into water of a water tank. CONSTITUTION:The outside diameter of the tip part 2 of a water feed pipe 1 is diminished toward the front part. The inside diameter of an air jacket 3 is diminished toward the front part via a gap (t) in the external circumference of the tip part 2. The air jacket 3 is connected to the water feed pipe 1 by the basic end part 3a. An air intake pipe 4 is connected to the large diameter part 3' of the air jacket 3. The tip part of the air jacket 3 is lengthened 3'' to the front part from the tip part 2 of the water feed pipe 1. The basic end face of a discharge pipe 5 engaged with the inside of the lengthened part 3'' is provided oppositely to the opening part t' of the tip of the gap (t).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air / water ejector for taking innumerable bubbles from outside air into a water pipe.

[0002]

2. Description of the Related Art Conventionally, in order to generate air bubbles in hot water such as a bathtub, an in-tub air discharge device has been developed in which a submersible pump is put into the bathtub and outside air is taken into the pump from a hose or a tube.

Since this device forcibly mixes air into the pressurized water discharged from the submersible pump, the number of bubbles is small, and the medical effect on the human body by air ions and the massage effect by vibration of the bubbles are small. Not only that, but because the pump power source is carried into the bathtub, there is a risk of human injury due to electrical leakage.

Therefore, a concept arises in which a circulation pump for hot water in the bathtub is arranged outside the bathtub and air is taken into the discharge pipe of the pump from the atmosphere. However, if the discharge pressure of the circulating water becomes high due to the length or the diameter of the tip pipe of the air intake part to the discharge pipe becomes high, the phenomenon that water flows backward from the air intake part to the atmosphere side occurs. There is a problem that it is difficult to eject multi-bubble air / water having high pressure.

[0005]

DISCLOSURE OF THE INVENTION According to the present invention, water with high pressure (hot water) is jetted into bath water and at the same time, an infinite number of bubbles are entrained in the pressurized water to supply an infinite number of bubbles to a human body, and The object is not only to improve the massage effect due to the vibration of bubbles and the osmotic pressure into the skin due to the vibration, but also to prevent the risk of electric leakage.

[0006]

In order to achieve the above object, the present invention is directed to a water pipe in which the outer diameter of the tip portion is reduced toward the front, and the inner diameter is directed toward the outer periphery of the tip portion through a gap. And a reduced air jacket at the base end, an air intake pipe is connected to the large diameter portion of the air jacket, and the tip of the air jacket is extended from the tip of the water pipe to the inside of the extension. The air / water ejector in which the base end face of the discharge pipe fitted to the above is provided in opposition to the tip opening of the gap. The air / water ejector according to the invention described above has a stepwise reduction. The first, in which the ejector is sequentially connected to the discharge pipe having a large inner diameter.
Or the air / water ejector according to the second aspect of the present invention, wherein a part of the outer diameter reducing surface of the tip of the water pipe and a part of the inner diameter reducing surface of the air sleeve are in contact with each other, and a plurality of air circulation grooves are formed on the outer diameter reducing surface of the water pipe The air / water ejector according to the first, second or third invention, wherein the inner diameter of the discharge pipe is larger than the reduced inner diameter of the tip of the water supply pipe. Alternatively, the air / water ejector described in the fourth invention is used.

[0007]

In the present invention, the water pipe 1 is connected to the discharge port 10 'of the pump 10 provided outside the water tank 9, and the pipe 11 and the discharge pipe 5 connected to the suction port 10 "are placed in the water 8 in the water tank 9. To form a circulation path for the water 8 and operate the pump 10 to
The water can be circulated and the pressure water can be ejected from the discharge pipe 5 into the aquarium water 8.

In this state, the tip end opening t'of the gap t
Then, air is sucked and wound around the outer periphery of the pressure water 12 jetted from the tip 2 of the water pipe 1, and the suction amount is a gap t in the large diameter portion 3 ′ between the air sleeve 3 and the tip 2 of the water pipe 1. This is facilitated by expanding the capacity of the.

Further, the amount of sucked air from the tip end opening portion t'has a sudden increase in the flow velocity between the outer diameter reducing step surface 6 of the tip portion 2 and the inner diameter reducing step surface 6'of the air sleeve 3, and It follows the flow velocity of the jetted pressure water 12 and moves along the boundary 12 'between the inner peripheral surface of the discharge pipe 5 and the outer periphery of the jetted pressure water 12 to reduce the resistance of the boundary 12'.

In FIG. 4, the air squeezed and sucked toward the front side is subdivided by the plurality of air circulation grooves 7 and jetted pressure water 12
The mixed bubbles with are made finer.

Further, when a plurality of ejectors are sequentially connected to each other by the discharge pipe 5 toward the destination, since the ejectors have successively larger sizes, the amount of air taken into the outer periphery of the jetted pressure water 12 increases and the jetted water is jetted out. The amount of mixed bubbles in the pressure water 12 increases.

[0012]

EXAMPLE A circulation pump 10 is provided outside a bath or water tank 9, a water supply pipe 1 is connected to a discharge port 10 'of the circulation pump 10, a pipe 11 is connected to a suction port 10 ", and a lower end opening of the pipe 11 is connected. The part 11 ′ is opened at the bottom of the water tank 9, and the water pipe 1
Is arranged in the water tank 9 or toward the water 8 in the water tank 9 to form hot water or a circulation path for the water 8.

The tip portion 2 of the water supply pipe 1 has an outer diameter reduced toward the front in a slanted or stepwise manner, and a gap t is formed on the outer circumference of the tip portion 2.
An air sleeve 3 whose inner diameter is reduced toward the front via an inclined or stepped shape is provided, and both are connected to one body at a base end portion 3a. The air intake pipe 4 is connected to the large-diameter portion 3'of the air sleeve 3 so as to communicate with the gap t, and the intake pipe 4 is opened to the atmosphere.

The tip of the air sleeve 3 extends 3 "forward from the tip 2 of the water supply pipe 1, and the base end face 5'of the discharge pipe 5 fitted in the extension 3" is opened at the tip of the gap t. A unit of air / water ejector is formed opposite to the part t ′.

As shown in FIG. 1, a small diameter portion of the diameter expansion joint 13 is fitted to the tip (lower end) of the discharge pipe 5, and the large diameter portion of the joint 13 has a diameter smaller than that of the water supply pipe 1 of the first unit. A large water pipe 1 is connected, a second air / water ejector unit similar to the above is formed at the tip portion 2 of the water pipe 1, and the size of the ejector of the second unit is the size of the ejector of the first unit. It is larger, and a plurality of units are sequentially connected. That is, in FIG. 1, the inner diameter D of the small diameter portion of the tip portion 2 of the water supply pipe 1 of the second unit is set to be larger than the inner diameter d of the small diameter portion of the tip portion 2 of the water supply pipe 1 of the first unit, and the discharge of the first unit is performed. The inner diameter D ′ of the discharge pipe 5 of the second unit is formed larger than the inner diameter d ′ of the pipe 5.

Further, as shown in FIG. 4, the step-like outer diameter reducing surface 6 of the tip portion 2 and the step-like inner diameter reducing surface 6'of the air sleeve 3 are brought into contact with each other to reduce the step-like outer diameter of the tip portion 2. A plurality of radial air circulation grooves 7 are formed on the surface 6 at equal intervals to form a large-diameter portion gap t.
And the small-diameter portion gap t can be connected and connected. The inner and outer diameter reducing surfaces 6, 6'may be tapered rather than stepped.

Reference numeral 14 in the figure denotes an annular projection for water flow agitation, and 15 denotes an annular projection for air agitation.

[0018]

Since the present invention is constructed as described above, it is easy to take in outside air from the tip opening t'of the gap t into the outer periphery of the pressure water 12 jetted from the tip 2 of the water pipe 1 to the jetted pressure water 12. This has the effect of increasing the amount of bubbles. Further, by connecting the ejectors having successively larger sizes to the discharge pipe 5 having successively larger inner diameters, the amount of ejected bubbles can be increased.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an air / water ejector of the present invention.

FIG. 2 is a vertical sectional view of one unit of the ejector.

FIG. 3 is a perspective view of a part of a water pipe having an air circulation groove.

FIG. 4 is a partial vertical cross-sectional view of a portion having an air circulation groove.

[Explanation of symbols]

 1 water supply pipe 2 tip part t gap t'tip opening part 3 air sleeve 3a base end part 3'large diameter part 3 "extension part 4 air intake pipe 5 discharge pipe 5'base end face 6 outer diameter reducing face 6'inner diameter reducing face 7 Air circulation groove d, D Reduced inner diameter of water supply pipe d ', D'Inner diameter of discharge pipe

Claims (5)

[Claims] 1. A water supply pipe having a distal end reduced in outer diameter toward the forward end, and an outer circumference of the distal end connected to a proximal end of an air sleeve having an inner diameter reduced toward the front through a gap, An air intake pipe is connected to the large diameter portion of the air sleeve, the tip of the air sleeve is extended forward from the tip of the water supply pipe, and the base end surface of the discharge pipe fitted in the extension is the tip of the gap. An air / water ejector that faces the opening. 2. The air / water ejector according to claim 1, wherein the reduction is stepwise. 3. The air / water ejector according to claim 1 or 2, wherein a plurality of ejectors having successively larger sizes are connected to each other by the discharge pipe having successively larger inner diameters. 4. A part of the outer diameter reducing surface of the water pipe and a part of the inner diameter reducing surface of the air sleeve are in contact with each other, and a plurality of air circulation grooves are formed on the outer diameter reducing surface of the water pipe. Claim (1) (2) or
Air / water ejector described in (3). 5. The air / water ejector according to claim 1, wherein the inner diameter of the discharge pipe is larger than the reduced inner diameter of the tip of the water supply pipe.