JPH06149386A - Mixer for vapor and water - Google Patents

Abstract

PURPOSE:To provide the mixer of vapor with water in which a thermal efficiency can be improved by controlling the blowing-out speed of babbles. CONSTITUTION:Water W is introduced from a water introducing port 22 to a mixer 20, and vapor S is introduced from a vapor introducing port 25 to a cylindrical body, 31. A coil spring 33 is provided in the cylindrical body 31, and a pressure receiving member 34 is attached to the top end of the coil spring 33. The pressure receiving member 34 receives a vapor pressure from a left side, and receives a water pressure from a right side (mixing chamber 21). When the vapor pressure is beyond the water pressure, the pressure receiving member 34 is moved to the right side, the coil sprint 33 is extended, and the vapor S is allowed to blow out from the clearance of each coil 33b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mixer for producing hot water by mixing steam and water.

[0002]

2. Description of the Related Art Conventionally, there is a mixer that mixes steam and water to produce hot water. Since such a mixer utilizes latent heat of steam, it has excellent thermal efficiency. An example of this type of mixer is shown in FIG.

In FIG. 5, water W is introduced from a water inlet 22 into a mixing chamber 21 for mixing steam and water. Into the mixing chamber 21, there is inserted a steam blowing device 30 composed of a pipe having a large number of small holes 23. The steam blowing device 30 is configured to supply the steam S from the steam inlet 25 to the small holes 23.
It is blown out into the mixing chamber 21 through the. The water W is mixed with the steam S to raise the temperature, becomes hot water H, and is discharged from the hot water discharge port 26.

[0004]

In the mixer 20, in order to keep the temperature of the hot water H at a constant value, the supply amount of the steam S is changed by the steam amount adjusting valve 8. Here, in the mixer 20 of this type, the steam S and the water W are better mixed when the blowing speed of the steam S blown out from the small holes 23 is reduced to some extent, so that the thermal efficiency is good. However, in the above-mentioned conventional technique, when the supply amount of the steam S is increased, the blowing speed of the steam S blown out from the small holes 23 is increased, so that the thermal efficiency is lowered.

The present invention has been made in view of the above conventional problems, and an object of the present invention is to provide a steam-water mixer capable of improving the thermal efficiency by controlling the blowing rate of bubbles.

[0006]

In order to achieve the above object, a steam blowing device according to the present invention has a pressure receiving member that receives water pressure from an outer mixing chamber and steam pressure from an inner side, and a tip portion. The coil spring is attached to the pressure receiving member and has a large gap for blowing out steam by expansion.

[0007]

According to the present invention, the amount of steam supplied is increased,
When the vapor pressure rises, the pressure receiving member moves and the coil spring expands. As a result, the gap between the coils becomes large, and the steam blowing area becomes large. Therefore, even if the supply amount of steam is increased, there is no fear that the blowing speed of steam becomes too high.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show a first embodiment of the present invention. Prior to the description of the mixer, a hot water production system in which the mixer is used will be described. In FIG. 3, the tank 1 is provided with a float valve 2. This float valve 2 is a tank 1
The water level is kept constant, and the flow rate of the cold water C from the water supply pipe 3 is controlled. The tank 1 is provided in the circulation path 4. The circulation path 4 is provided with a pump 5 that supplies the water in the tank 1 to the mixer 20. The temperature of the hot water in the mixer 20 is detected by the temperature sensor 6, the controller 7 adjusts the opening degree of the steam amount adjusting valve 8 based on the detected temperature, and flows into the mixer 20 from the steam pipe 9. Control the amount of steam. From the hot water discharge pipe 10 in the circulation path 4, the extraction pipe 1
1 is branched. The tip 12 of the hot water discharge pipe 10 is inserted into the tank 1, and the hot water H is collected in the tank 1.

Next, the mixer 20 will be described. In FIG. 1, the case 24 of the mixer 20 includes a water inlet 22
Further, an introduction pipe part 27 having the steam introduction port 25 and a mixing pipe part 28 having the hot water discharge port 26 are fastened together by bolts (not shown). The tubular body 31 of the steam blowing device 30 is fixed to the elbow 27a communicating with the steam introducing port 25 of the introducing pipe portion 27 with a screw 31a.
In addition, on the inner circumference of the mixing pipe portion 28, a spiral protrusion 28
a is formed, and promotes mixing of the steam S and the water W.

Both ends 31b of the tubular body 31 are open, and four vapor passage holes 31c and 31d are provided in the upstream portion and the downstream portion, respectively. Steam passage hole 3 in the downstream part
1d is longer than the steam passage hole 31c in the upstream portion. The cotter pin 3 is provided on the base end 31e of the tubular body 31.
2 is fixed in a state of penetrating in the radial direction. An engagement portion 33a of a coil spring 33 is engaged with the cotter pin 32, and the coil spring 33 is mounted along the inner circumference of the tubular body 31.

As clearly shown in FIG. 2, the outer diameter of the coil spring 33 is slightly smaller than the inner diameter of the tubular body 31, so that the coil spring 33 can expand and contract within the tubular body 31. This coil spring 33
Has its interior communicating with the steam inlet 25,
In the unloaded state in which no load is applied, as shown in FIG. 1, the coils 33b are in pressure contact with each other, and therefore the steam S does not pass through. A pressure receiving member 34 is fixed to a tip portion 33c of the coil spring 33 shown in FIG. The pressure receiving member 34 receives water pressure from the mixing chamber 21 outside the tip portion of the coil spring 33 to the outer end surface 34a, and receives steam pressure from the inner side of the coil spring 33 to the inner end surface 34b so that the steam pressure exceeds the water pressure. The coil spring 33 is extended when it is released. The other configurations are similar to those of the conventional example, and the same portions or corresponding portions will be denoted by the same reference numerals and detailed description thereof will be omitted.

Next, the operation of the above configuration will be described. In FIG. 3, the cold water C flowing into the tank 1 from the water supply pipe 3 is passed through the circulation path 4 by the pump 5 and the mixer 2
It is pumped into 0. On the other hand, from the steam pipe 9 to the steam amount adjusting valve 8
The steam S is pressure-fed into the tubular body 31 of FIG. 2 via the, and the steam S is blown out from the gap 33d between the coils 33b in the coil spring 33, and the water W and the steam S are mixed. As a result, the temperature of the water W rises, part of the hot water H is taken out from the take-out pipe 11 in FIG. 3, and the surplus hot water H is returned to the tank 1. Here, when the temperature detected by the temperature sensor 6 has not reached the set temperature, the controller 7 increases the opening degree of the steam amount adjusting valve 8 to increase the inflow amount of the steam S, so that the hot water H The temperature is controlled so that it becomes the set temperature.

In the above structure, when the supply amount of the steam S in FIG. 2 increases, the pressure in the coil spring 33 rises and the steam pressure acting on the pressure receiving member 34 increases, so that the gaps between the coils 33b are increased. 33d becomes slightly larger.
Therefore, as the supply amount of the steam S increases, the blowing area of the steam S increases, so that the blowing speed of the steam S can be suppressed from increasing. As a result, the thermal efficiency is improved.

FIGS. 4A and 4B show a second embodiment.
In the second embodiment, as clearly shown in FIG. 4A, the shapes of the vapor passage holes 31c and 31d of the tubular body 31 are different from those of the first embodiment. That is, as shown in FIG. 4B, the vapor passage holes 31c and 31d are formed so that the vapor passage holes 31c and 31d become significantly larger as they go outward in the radial direction R.
1g and 31f are formed. This makes the flow of the water W smooth. The rest of the configuration of the second embodiment is the same as that of the first embodiment, and the same parts or corresponding parts are designated by the same reference numerals and their description and illustration are omitted.

[0015]

As described above, according to the present invention, the pressure receiving member that receives the water pressure from the outer mixing chamber and the vapor pressure from the inner side is provided, and the tip end portion of the coil spring is attached to this pressure receiving member. Therefore, as the supply amount of steam increases, the steam outlet holes formed in the gaps between the coils become larger, so that the speed of steam outlet can be suppressed from increasing. Therefore, the thermal efficiency is improved.

[Brief description of drawings]

FIG. 1 is a sectional view of a mixer showing a first embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view showing a part of a steam blowing device.

FIG. 3 is a schematic configuration diagram of a hot water production system.

FIG. 4A is a front view of a tubular body according to a second embodiment,
(B) is sectional drawing of the steam blowing device.

FIG. 5 is a schematic front view of a conventional mixer.

[Explanation of symbols]

20 ... Mixer, 21 ... Mixing chamber, 22 ... Water inlet, 25 ...
Steam inlet, 26 ... Warm water outlet, 30 ... Steam blowing device,
33 ... Coil spring, 33d ... Gap, 34 ... Pressure receiving member, H ... Warm water, S ... Steam, W ... Water.

Claims (1)

[Claims] 1. A water introducing port for introducing water into a steam / water mixing chamber; a steam blowing device which is inserted into the mixing chamber and blows steam introduced from the steam introducing port into the mixing chamber in a bubble state; In a steam and water mixer having a hot water outlet for discharging heated water that has been heated, the steam blowing device receives water pressure from the mixing chamber on the outside and steam pressure from the inside. And a coil spring having a tip end attached to the pressure receiving member and having a large gap for blowing out steam by expansion, a mixer of steam and water.