JP3120021B2 - Steam humidifier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steam humidifier, and more particularly, to a steam humidifier which jets steam into an air passage in an air conditioner or a duct to humidify air.

[0002]

2. Description of the Related Art An example of this type of conventional steam humidifier is disclosed in Japanese Utility Model Publication No. 3-17159. In this steam humidifier 1, as shown in FIG. 5, the outer tube 2 is divided into two chambers by a porous partition wall 3 so as to divide the cross section into two, and one of the chambers 4a
An inner pipe (steam supply pipe) 5 is inserted into the other chamber, and a steam outlet (steam outlet) 6b is provided on the upper surface of the other chamber 4b.

When the steam humidifier 1 is installed in an air conditioner 7 as shown in FIG. 6, dust is removed through an air filter 8 and air heated or cooled to a predetermined temperature through a heat exchange coil 9. (Outside air) is humidified by the steam humidifier 1 according to the required humidity. At this time, a steam generation source (not shown) is connected to the inner pipe (steam supply pipe) 5, and steam from the steam generation source passes through the inner pipe (steam supply pipe) 5, the chamber 4a, the porous partition wall 3 and the chamber 4b. It is ejected from an ejection hole (steam ejection port) 6b.

[0004]

In the above-mentioned prior art,
Since the whole was formed in a substantially rod shape, as shown in FIG. 6, there was a problem that the humidified steam could not be evenly dispersed in the entire airflow, and the required humidity could not be satisfied. Also, as in the case of humidification during cooling, low-temperature air (for example, dry bulb temperature 1)
When humidifying (5 ° C.), a high relative humidity (for example, 78%) is required as shown in the humid air diagram of FIG. There is also a problem that the part is in a supersaturated state (humidity of 100% or more) and the steam condenses and wets the air conditioner 7 and the inner surface of the duct. As a means for solving these problems, it is conceivable to use a plurality of steam humidifiers in combination, but that would increase the cost.

[0005] Therefore, a main object of the present invention is to provide a steam humidifier which can satisfy the required humidity at a low cost and can prevent a supersaturated state.

[0006]

According to the present invention, there are provided a plurality of first devices.
An outer pipe having a steam outlet, and a steam supply pipe disposed in the outer pipe and having a plurality of second steam outlets,
In a steam humidifier configured to eject steam depressurized by being ejected from a steam outlet into an outer pipe through a first steam outlet, the steam humidifier is disposed between the first steam outlet and a steam supply pipe.
Porous barrier for capturing condensed water in steam along the length of the tube
A wall is provided and a plurality of third steam outlets are provided in each of the first steam outlets.
A steam humidifier, wherein a humidifier having a steam outlet is vertically mounted above an outer tube.

[0007]

The steam taken in from the steam generation source into the steam supply pipe is ejected from the second steam outlet into the outer pipe and decompressed, and the condensed water contained in the steam is removed by the porous partition in the outer pipe. Is done. Then, the steam in the outer tube is provided from the first steam outlet to each of the humidifying tubes vertically mounted on the outer tube above the outer tube, and a plurality of third steam jets provided in the humidifying tube are provided. It is ejected from the exit into the airflow.

[0008]

According to the present invention , condensed water is removed by the porous partition wall.
Since it can be removed and the humidified steam can be uniformly dispersed and jetted from the steam jet port of the humidifying pipe to the entire air stream, the required humidity can be satisfied at a low cost, and a partial supersaturation can be prevented. . The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A steam humidifier 1 of this embodiment shown in FIGS.
0 is for humidifying the air in the air conditioner 12 as shown in FIG. The air conditioner 12 includes a casing 14, and an air inlet 16 and an air outlet 18 are formed on one side and the other side of the casing 14 facing each other. Further, inside the casing 14, an air filter 20, a heat exchange coil 22 and a blower 24 are provided in this order from the upstream side (the air inlet 16 side) of the air flow path A, and an air outlet 24a of the blower 24 is connected to the air outlet. 18 is connected. And the steam humidifier 10 is installed between the heat exchange coil 22 and the blower 24.

The steam humidifier 10 (FIGS. 2 to 4) includes an outer tube 26 whose length is set slightly shorter than the width of the air flow path A in the air conditioner 12. Inside the outer tube 26, a porous partition wall 28 having a plurality of holes 28a is formed so as to extend in the tube axis direction. Divided into two. And the first room 30
A plurality of first steam outlets (steam distribution ports) 34
Are formed at predetermined intervals in the longitudinal direction, and the second chamber 32
Holes 36a and 36b are formed on both sides in the longitudinal direction. A drain outlet 37 is provided on the lower surface of the first chamber 30.
Is formed.

In the second chamber 32, a steam supply pipe 40 having a plurality of second steam outlets (pressure reducing ports) 38 (φ3 to 5) is provided at both ends of the outer pipe 26 (holes 36a and 36).
b) and projecting from the steam supply pipe 40
And the inner surfaces of the holes 36a and 36b are joined with airtightness. Each of the second steam outlets (pressure reducing ports) 38 is formed toward the side opposite to the porous partition wall 28 in order to prevent the steam from directly hitting the porous partition wall 28. A cap 42 is attached to one end of the steam supply pipe 40, and a connection portion 44 for connecting a pipe from a steam generation source (not shown) is formed at the other end.

Further, the first chamber 30 is formed on the upper surface of the first chamber 30.
Each of the steam outlets (steam distribution ports) 34 has a humidifying pipe 46.
Are mounted perpendicular to the outer tube 26. Humidifier tube 46
Is set slightly shorter than the height of the air flow path A in the air conditioner 12, and a plurality of third steam outlets 48 are formed on the side surface of the humidification pipe 46 at predetermined intervals. Therefore, in the steam humidifier 10 as a whole, the plurality of third steam outlets 48 are arranged substantially uniformly over the entire cross section of the air flow path A.

In the operation of the air conditioner 12 in which the steam humidifier 10 is incorporated, when the blower 24 is driven, air flows as shown by an arrow in FIG. That is, the air inlet 1
The air taken into the casing 14 from 6 is dust-removed by an air filter 20, heated or cooled to a predetermined temperature by a heat exchange coil 22, humidified by a steam humidifier 10 if necessary, and then air outlet by a blower 24. 18 and sent out.

At this time, in the steam humidifier 10, FIG.
As indicated by a middle arrow, steam from a steam generation source (not shown) is supplied into the steam supply pipe 40, and is ejected from the second steam outlet (decompression port) 38 into the second chamber 32 (outer pipe 26). The pressure is reduced. Then, the steam ejected into the second chamber 32 is supplied to the second chamber 30 through the hole 28 a of the porous partition wall 28. In the outer tube 26, the condensed water in the steam is captured by the steam contacting the porous partition wall 28 and the wall surface of the outer tube 26, and the captured condensed water is drained from the drain outlet 37. As the porous partition wall 28, any material having a large contact area with steam and a small pressure loss may be used, and a punching metal, a wire mesh, a metal scrubber, or the like can be used. Then, the steam from which the condensed water has been removed in the outer pipe 26 is distributed from each first steam jet port (steam distribution port) 34 to each humidifying pipe 46, and from each third steam jet port 48 to the inside of the air passage A. It is spouted evenly.

According to this embodiment, since the humidified steam can be uniformly dispersed and jetted into the air flow path A, the required humidity can be satisfied. In particular, in the case of low-temperature humidification, steam having a high relative humidity is required, but partial supersaturation does not occur because there is no uneven supply of steam to the air flow path A. In addition, since there is no need to use a plurality of steam humidifiers, the cost is low. The sizes of the second steam outlet (decompression port) 38 and the third steam outlet 48 are φ3 to 5 and φ10, respectively.
Since it is set to a relatively large value of 20, there is no risk of clogging due to foreign matter.

Further, by removing the cap 42, the inside of the steam supply pipe 40 can be easily inspected. In addition, the steam humidifier 10 can be applied to any device having an air flow path such as a duct in addition to the air conditioner 12 described above.
However, the length of the outer pipe 26, the steam supply pipe 40, the humidification pipe 46, the number of the third steam jet ports 48, and the like need to be appropriately changed according to the size of the air flow path.

[Brief description of the drawings]

FIG. 1 is an illustrative view showing an air conditioner incorporating one embodiment of the present invention;

FIG. 2 is an illustrative view showing one embodiment of the present invention;

FIG. 3 is a side view of the embodiment in FIG. 2;

FIG. 4 is a sectional view taken along line IV-IV in FIG. 2;

FIG. 5 is an illustrative view showing a conventional technique;

FIG. 6 is an illustrative view showing an air conditioner into which a conventional technique is incorporated.

FIG. 7 is a psychrometric chart showing the relationship between dry bulb temperature and relative humidity.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Steam humidifier 12 ... Air conditioner 26 ... Outer pipe 28 ... Perforated partition wall 34 ... 1st steam jet port 38 ... 2nd steam jet port 40 ... Steam supply pipe 46 ... Humidifying pipe 48 ... 3rd steam jet port

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shogo Tomita 28 Hirade Industrial Park, Utsunomiya City, Tochigi Prefecture Inside the Tokugi Plant of Kubota Train Co., Ltd. (56) References Japanese Utility Model 280-28026 (JP, U) Japanese Utility Model 2-41023 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24F 6/18 F24F 3/14

Claims (1)

(57) [Claims] An outer pipe having a plurality of first steam outlets, and a steam supply pipe disposed in the outer pipe and having a plurality of second steam outlets, wherein the outer pipe has a plurality of second steam outlets. In a steam humidifier configured to eject steam depressurized by being ejected into an outer tube from the first steam outlet, the steam humidifier is disposed between the first steam outlet and the steam supply pipe.
To capture the condensed water in the steam along the length of the outer tube.
And a humidifying pipe having a plurality of third steam jets at each of the first steam jets is connected to the outer pipe by
A steam humidifier mounted vertically upward .