JP6806831B2 - Steam humidifier - Google Patents

Description

The present invention relates to a steam humidifier used in an air conditioner or the like.

A steam humidifier generally sprays and diffuses steam into an air stream and takes it into the air for humidification. However, when such a steam humidifier is provided in, for example, an air conditioner, if the steam sprayed in the air flow touches the fan or filter of the air conditioner before it is taken into the air, water droplets collide with them or steam Condensation occurs due to condensation, which not only reduces the humidifying effect but also causes water leakage in air conditioning equipment.
Therefore, when the steam humidifier is used in combination with other equipment, in order to reduce the size of the entire equipment and improve the degree of freedom in design, the moving distance of this steam, that is, between the steam humidifier and other equipment , It is necessary to reduce the distance (called the humidification absorption distance) until the sprayed vapor is taken into the air.

As one method of reducing the humidification absorption distance, the humidification absorption distance is reduced by bypassing the steam sprayed from the steam humidifier. For example, in Patent Document 1, as shown in FIG. 9, a humidifier in which a steam spray tube 101 having a spray hole 101a for spraying steam and a diffusion box 102 forming a negative pressure region are arranged to face each other in an air flow is described. Has been done. As shown in the drawing, the diffusion box 102 is a groove-shaped member having a concave cross section, and by arranging the groove bottom 102a on the upstream side of the air flow, an air vortex is formed in the groove.
In this humidifier, steam is sprayed and diffused from the steam spray pipe 101 toward the vortex of air in the groove, and the vapor diffused in the vortex is diffused from the diffusion box 102 into the airflow together with the vortex. This makes it possible to shorten the humidification absorption distance as compared with spraying the steam directly into the air flow.

Further, although not described in the literature, as shown in FIG. 10, the steam humidifier is arranged in the steam receiving cover 202, which is a groove-shaped member having a concave cross section, and the groove of the steam receiving cover, and sprays. It is also conceivable to include a steam spray pipe 201 provided with holes 201a and a plate-shaped steam diffusion cover 203 facing the opening of the steam receiving cover 202 and wider than the opening.
In this steam humidifier, the steam diffusion cover 203 is arranged on the upstream side of the air flow, and the steam spray pipe 201 sprays steam toward the bottom wall 202a of the groove of the steam receiving cover 202. Here, the steam coming out from the steam receiving cover 202 in the direction opposite to the air flow is diffused along the steam diffusion cover 203 arranged in the direction orthogonal to the air flow, and then diffused into the air flow. The steam sprayed from the steam spray pipe 201 is diffused into the air flow through such a complicated path.
However, in any of the humidifiers, the steam once released into the airflow only diffuses in the airflow as it is, and the subsequent humidification absorption distance is not shortened, and it is impossible to do so.

Japanese Unexamined Patent Publication No. 2003-50027

The present invention has been made in view of such a situation, and an object of the present invention is that the humidification absorption distance can be shortened by the attraction effect of the slit provided in the steam receiving cover even after the humidifier is once discharged into the air flow. Is to do so.

The present invention includes a groove-shaped steam receiving cover having a concave cross section, which is an opening with an opening on one side, a steam spray tube arranged in the groove of the steam receiving cover and provided with a spray hole for spraying steam, and steam. A steam humidifier provided with a steam diffusion cover that is arranged to face the opening of the receiving cover and is wider than the opening width of the opening, and is a bottom wall of a groove having a concave cross section of the steam receiving cover. A slit having an effect of attracting a steam flow is provided in the center in the width direction along the longitudinal direction of the bottom wall, and the spray holes are formed on both sides of the slit in the bottom wall or both sides of the steam receiving cover. It is a steam humidifier provided to spray steam toward the wall .

According to the present invention, in addition to shortening the humidification absorption distance in the conventional humidifier, the humidification absorption distance can be further shortened after the steam is released into the air flow. Therefore, the humidifier and the equipment such as a fan and a filter arranged downstream thereof can be arranged closer to each other, and the air-conditioning equipment provided with the humidifier can be miniaturized.

It is an exploded perspective view of the steam humidifier which concerns on embodiment of this invention. It is a horizontal sectional view which shows the schematic structure of the steam humidifier which concerns on embodiment of this invention. It is a figure which shows the image of the steam flow and steam diffusion range of the steam humidifier which concerns on embodiment of this invention. It is a figure which shows the action of the slit provided in the steam receiving cover of the steam humidifier which concerns on embodiment of this invention, FIG. 4A is an image of the steam diffusion range and steam flow when there is a slit, and FIG. It is a figure which shows the image of the vapor diffusion range when there is not (comparative example). It is a figure which shows the operation of the condensed water scattering prevention plate provided in the steam receiving cover of the steam humidifier which concerns on embodiment of this invention, and FIG. 5A is an image of the movement of condensed water when there is a condensed water scattering prevention plate. FIG. 5B is a diagram showing an image of the movement of condensed water when there is no condensed water scattering prevention plate (comparative example). It is a figure which shows the arrangement of the spray hole provided in the steam spray tube in the steam humidifier which concerns on embodiment of this invention, FIG. 6A is the staggered arrangement with respect to the longitudinal direction of a slit, and FIG. 6B is the longitudinal direction of a slit. It is a figure which shows the arrangement (comparative example) which aligned the positions on both sides. It is a figure which shows the operation of the canopy and the bottom lid provided in the steam receiving cover of the steam humidifier which concerns on embodiment of this invention, FIG. 7A is an image of the steam diffusion range when there is a canopy and a bottom lid, FIG. 7B. Is a diagram showing an image of the vapor diffusion range when there is no canopy and bottom lid (comparative example). FIG. 8A is a diagram showing the relationship between the angle of the spray hole provided in the steam spray pipe of the steam humidifier according to the embodiment of the present invention and the steam flow, and FIG. 8A shows an inscribed angle of 60 with respect to the center line of the steam spray pipe. °, that is, an image of the steam flow when each angle of the spray hole with respect to the center of the steam spray tube is 30 ° with respect to the reference plane, FIG. 8B shows the case where the inscribed angle is 90 ° (comparative example), that is, spray It is a figure which shows the image of the steam flow which each angle seen from the center of the steam spray tube of a hole is 45 ° with respect to a reference plane. It is a horizontal sectional view which shows the schematic structure of an example of the conventional steam humidifier. It is a horizontal sectional view which shows the schematic structure of another example of the conventional steam humidifier.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
<Outline configuration of steam humidifier>
FIG. 1 is an exploded perspective view of the steam humidifier according to the embodiment of the present invention, and FIG. 2 is a horizontal sectional view showing a schematic configuration of the steam humidifier according to the embodiment of the present invention.

As shown in FIGS. 1 and 2, the steam humidifier 1 according to the present embodiment is roughly composed of a steam spray pipe 11, a steam receiving cover 12, and an evaporation diffusion cover 13. The steam spray tube 11 is a tube body provided with a spray hole 11a, and the steam receiving cover 12 is configured as a groove-shaped member having a concave cross section, which is an opening that is closed on three sides and opened on one side. Further, the steam diffusion cover 13 is arranged so as to face the opening of the steam receiving cover 12, and is made of a plate-like body having a width wider than the opening width of the opening.

A plurality of spray holes 11a are arranged on the peripheral surface of the steam spray pipe 11 in the longitudinal direction (vertical direction in FIG. 1). The arrangement of the spray holes 11a is arbitrary, but in the present embodiment, as will be described later with reference to FIG. 6, the spray holes 11a are arranged symmetrically in a staggered manner with a constant inscribed angle with respect to the center of the steam spray tube 11. There is. Further, the upper end of the steam spray pipe 11 is closed by a cap 11b, and steam is supplied to the lower end of the steam spray pipe 11 from a steam supply pipe (not shown).

The steam receiving cover 12 is a groove-shaped member having a concave cross section composed of a bottom surface connected to both side walls 12c and both side walls 12c, and a slit extending in the entire longitudinal direction of the bottom wall 12d of the groove in the center in the width direction. 12a is formed. Further, on the inner surfaces of both side walls, a condensed water scattering prevention plate 12b having an L-shaped cross section extending over the entire longitudinal direction is attached, one L-shaped piece is attached to both side walls 12c of the steam receiving cover 12, and the other piece is attached to both sides. It is arranged so as to project inward from the wall. The condensed water scattering prevention plate 12b is for receiving the condensed water generated in the steam receiving cover 12 and suppressing the condensed water from coming out from the opening.
The canopy 16 and the bottom lid 17 are covered on the upper end and the lower end of the steam receiving cover 12, respectively. The actions of the slit 12a, the condensed water scattering prevention plate 12b, the canopy 16 and the bottom lid 17 will be described later with reference to FIGS. 4, 5 and 7, respectively.

The steam spray pipe 11 is provided with pipe holding plates 14 and 15 at appropriate positions above and below the steam spray pipe 11 for positioning when the steam spray pipe 11 is arranged in the steam receiving cover 12. As shown in FIG. 1, for example, the pipe holding plates 14 and 15 are rectangular plates that match the groove shape of the steam receiving cover 12 having a concave cross section. The pipe holding plates 14 and 15 are provided with holes having a shape corresponding to the cross-sectional shape of the steam spray pipe 11, for example, a round hole, and the steam spray pipe 11 is positioned by inserting the steam spray pipe 11 into the holes. ..

Here, the position of the hole is not the center of the rectangular plate but the position near the bottom wall of the steam receiving cover 12, but the point is that the hole is arranged according to the position of the steam spray pipe 11 in the steam receiving cover. The position may be determined, and the position is not limited to that shown.
Further, when the steam spray pipe 11 is housed in the steam receiving cover 12, the reference planes of the spray holes 11a symmetrically arranged in a staggered manner with respect to the bottom wall of the groove (virtually described later with reference to FIG. 8). The arrangement is such that the surfaces P) are orthogonal to each other. As a result, the steam sprayed from the spray hole 11a is sprayed at the same inclination angle with respect to the bottom wall of the steam receiving cover 12.

<Steam flow and steam diffusion range>
Next, the schematic operation of the steam humidifier 1 having the above configuration will be described.
FIG. 3 is a diagram showing an image of the steam flow and steam diffusion range of the steam humidifier according to the embodiment of the present invention.

The figure shows a state in which the steam humidifier 1 is arranged so that the steam diffusion cover 13 is on the upstream side of the air flow. In this state, when steam is supplied from the steam supply pipe (not shown) to the steam spray pipe 11, the steam is obliquely sprayed from the spray hole 11a toward the bottom wall 12d of the steam receiving cover 12. The injected steam flows along the inner surface of the steam receiving cover 12 toward the opening (that is, in the direction opposite to the air flow). After exiting the opening, the vapor continues to diffuse in the negative pressure region blocked by the vapor diffusion cover 13, and then merges with the airflow to further diffuse. That is, the steam merges with the after-air flow diffused in the steam receiving cover 12 and on the steam diffusion cover 13, so that the steam is evenly diffused and the contact area with the surrounding air increases, so that the vapor is taken into the air. Be promoted. In the figure, A1 indicates a vapor diffusion range.

In the steam receiving cover 12, the sprayed steam in contact with the inner surface of the steam receiving cover 12 becomes condensed water, but as will be described later, the condensed water is captured by the condensed water scattering prevention plate 12b, so that the steam receiving Scattering of the cover 12 to the outside is prevented. Further, a part of the vapor flow diffused by the vapor diffusion cover 13 is attracted by the slit 12a, so that the width of the spray vapor diffusion range A1 is expanded, and as a result, the humidification absorption distance is shortened.

Next, the operation of the steam humidifier 1 will be specifically described.
<Slit action>
FIG. 4 is a diagram showing the action of a slit provided in the steam receiving cover of the steam humidifier according to the embodiment of the present invention, FIG. 4A is an image of a steam diffusion range and a steam flow when there is a slit, and FIG. 4B is an image. It is a figure which shows the image of the vapor diffusion range when there is no slit (comparative example). However, the steam humidifier shown in FIG. 4A is not provided with the condensed water scattering prevention plate 12b, and its width is shorter than that of the side wall of the groove shown in FIG. The steam humidifier shown in FIG. 4B is the same as the steam humidifier shown in FIG.

In the case of the steam humidifier shown in FIG. 4A, the steam flow a2 sprayed from the spray hole 11a is diffused into the after-air flow diffused by the steam receiving cover 12 and the steam diffusion cover 13, and becomes the steam flow a3. Further, a part of the steam flow diffused in the air flow is attracted by the negative pressure generated in the steam receiving cover through the slit 12a, and is drawn in like the steam flow a4. As a result, the entire steam diffusion range A2 is attracted to the steam receiving cover 12 side. As a result, the contact area with the surrounding air is increased, and the humidification absorption distance is shortened.

On the other hand, in the steam humidifier shown in FIG. 4B, the steam flow a5 sprayed from the spray hole 201a is only diffused into the air flow by the steam diffusion cover 203, so that the steam diffusion range A3 is the steam of FIG. 4A. It can be seen that the shape is vertically elongated as compared with the diffusion range A2, and the humidification absorption distance is clearly long.
Table 1 below shows the measurement results of the humidification absorption distance between the steam humidifier shown in FIG. 4A and the steam humidifier shown in FIG. 4B.

Here, as described above, the humidification absorption distance is the distance until the vapor sprayed in the air flow is taken into the air. Here, the distance from the steam spray pipe 11 at which the spray steam completely disappears is used. The saturation efficiency is an index showing how much humidification can be performed with respect to the saturation point (relative humidity 100%). The air temperature and wind speed before humidification are measured values on the upstream side of the steam diffusion cover 13 of the air flow. As shown in this table, the humidification absorption distance was shortened by about 9% by providing the slit, and the effect of shortening the humidification absorption distance by the slit was confirmed.

<Action of condensed water scattering prevention plate>
FIG. 5 is a diagram showing the operation of the condensed water scattering prevention plate provided on the steam receiving cover of the steam humidifier according to the embodiment of the present invention, and FIG. 5A is a diagram showing the operation of the condensed water scattering prevention plate when there is a condensed water scattering prevention plate. FIG. 5B is a diagram showing an image of the movement of the condensed water when there is no condensed water scattering prevention plate (comparative example).

As shown in FIG. 5A, when the vapor receiving cover 12 is provided with the condensed water scattering prevention plate 12b, the condensed water b1 in which the sprayed steam sprayed from the spray hole 11a is liquefied is as shown by the arrow c1 due to the air flow a6. Will be carried to. However, since it is captured by the condensed water scattering prevention plate 12b, it does not scatter to the outside through the opening of the steam receiving cover 12. The condensed water b1 captured by the condensed water scattering prevention plate 12b flows downward and is discharged.

On the other hand, when the steam receiving cover 12 is not provided with the condensed water scattering prevention plate 12b, as shown in FIG. 5B, the condensed water b1 is carried by the air flow a6 as shown by the arrow c1 and is carried by the arrow c2. As shown in the above, the steam receiving cover 12 scatters to the outside from the opening.

<Arrangement of spray holes>
6A and 6B are views showing the arrangement of spray holes provided in the steam spray tube in the steam humidifier according to the embodiment of the present invention, FIG. 6A is a staggered arrangement with respect to the longitudinal direction of the slit, and FIG. 6B is a slit. It is a figure which shows the arrangement (comparative example) which aligned the positions on both sides in the longitudinal direction of.

In the steam humidifier shown in FIGS. 6A and 6B, the steam supplied from the steam supply pipe 20 to the steam spray pipe 11 is sprayed from the spray hole 11a. In the steam humidifier shown in FIG. 6A, the spray holes 11a are arranged in a staggered manner in the vertical direction with the slit 12a interposed therebetween. Therefore, under the condition that the amount of humidification is the same and the number of holes is the same, the distance L1 of the spray holes when arranged in a staggered manner is such that the spray holes 11a are positioned in the vertical direction with the slit 12a in between, as shown in FIG. 6B. The interval in the vertical direction is shorter than the interval L2 when the above are aligned. Therefore, the humidity distribution in the vertical direction of the steam spray pipe 11 can be equalized.

<Action of canopy and bottom lid>
FIG. 7 is a diagram showing the operation of the canopy and the bottom lid provided on the steam receiving cover of the steam humidifier according to the embodiment of the present invention, and FIG. 7A is a diagram showing the steam diffusion range when the canopy and the bottom lid are present. Image, FIG. 7B is a diagram showing an image of the vapor diffusion range when there is no canopy and bottom lid (comparative example).

As shown in FIG. 7B, when there is no canopy and bottom lid, steam leaks at the upper and lower ends of the steam receiving cover 12, and therefore steam unevenness occurs in the vertical direction as shown in the steam diffusion range A5. .. That is, the vertical direction of the steam spray pipe 11 is not uniformly humidified.

On the other hand, as shown in FIG. 7A, when the canopy 16 and the bottom lid 17 are present, steam leakage at the upper and lower ends of the steam receiving cover 12 is prevented, so that the steam diffusion range A4 is vertical as shown in the steam diffusion range A4. No directional steam unevenness occurs. That is, the vertical direction of the steam spray pipe 11 is uniformly humidified.

<Angle of spray hole>
FIG. 8 is a diagram showing the relationship between the angle of the spray hole provided in the steam spray pipe of the steam humidifier according to the embodiment of the present invention and the steam flow, and FIG. 8A is a circle with respect to the center line of the steam spray pipe. Image of steam flow when the circumference angle is 60 °, that is, when each angle seen from the center of the steam spray pipe of the spray hole is 30 ° with respect to the reference plane, FIG. 8B shows the case where the circumference angle is 90 ° (comparative example). ), That is, it is a figure showing an image of a steam flow in which each angle seen from the center of the steam spray pipe of the spray hole is 45 ° with respect to the reference plane. Here, the reference surface P is a virtual surface that passes through the intermediate position of the adjacent spray holes 11a and the center line 11c of the steam spray pipe 11 on the circumferential surface in the transverse direction of the steam spray pipe 11.

As shown in FIG. 8A, when the angle is 60 °, the moving distance until the steam flow a7 sprayed from the spray hole 11a collides with the inner surface of the steam receiving cover 12 is 90 ° as shown in FIG. 8B. Since the steam flow a8 sprayed from the spray hole 11a is longer than the moving distance until it collides with the inner surface of the steam receiving cover 12, it becomes difficult for the steam to recondense. Therefore, the humidification efficiency can be improved and the humidification absorption distance can be shortened.

Finally, an example of each dimension of the steam spray pipe 11, the steam receiving cover 12, and the steam diffusion cover 13 will be shown.
Steam spray tube 11: diameter 30 mm, angle difference of spray hole 11a with respect to the axis of the steam spray tube 11: 60 °
Steam receiving cover 12: width 80 mm, depth 130 mm, slit width 10 mm
Steam diffusion cover 13: width 250 mm, distance from the opening of the steam receiving cover 12: 30 mm

The number of holes, the hole diameter, and the height of the humidifier of the spray hole 11a are determined by the design specifications. By changing the pore diameter, the amount of humidification per spray hole can be changed. That is, for example, by increasing the diameter, clogging of the scale can be improved and the amount of humidification per spray hole can be increased.

1 ... Steam humidifier, 11 ... Steam spray tube, 11a ... Spray hole, 11b ... Cap, 12 ... Steam receiving cover, 12a ... Slit, 12b ... Condensed water scattering prevention plate, 12c ... Side wall, 12d ... Bottom wall, 13 ... Steam diffusion cover, 14, 15 ... pipe holding plate, 16 ... canopy, 17 ... bottom lid, 20 ... steam supply pipe, A1 to A5 ... steam diffusion range, a1 to a8 ... steam flow, b1 ... condensed water, c1, c2 ... movement of condensed water, L1, L2 ... spray hole spacing.

Claims (4)

A groove-shaped steam receiving cover with a concave cross section, which is an opening with one side open,
A steam spray tube placed in the groove of the steam receiving cover and provided with a spray hole for spraying steam,
A steam diffusion cover that is placed facing the opening of the steam receiving cover and is wider than the opening width of the opening.
It is a steam humidifier equipped with
A slit having an effect of attracting a steam flow is provided at the center of the bottom wall of the groove having a concave cross section in the cross-section of the steam receiving cover along the longitudinal direction of the bottom wall .
The spray hole is a steam humidifier provided so as to spray steam toward both sides of the slit in the bottom wall or both side walls of the steam receiving cover . In the steam humidifier according to claim 1,
The steam receiving cover is characterized in that a plate-shaped member sprayed from the spray hole and prevented from discharging the water condensed in the steam receiving cover from the opening is provided on the side wall of the groove. Steam humidifier. In the steam humidifier according to claim 1 or 2.
The steam humidifier is characterized in that the spray holes are arranged in a staggered manner in the longitudinal direction of the steam spray pipe. In the steam humidifier according to any one of claims 1 to 3.
The steam humidifier is characterized in that the steam receiving cover has lids at its upper end and lower end.

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