JPH0336437A - Drain water splashing apparatus - Google Patents

Abstract

PURPOSE:To reduce the scooping resistance of drain water for diminishing water-splashing noise by a method wherein a drain-splash guard plate is located at around the periphery of a splasher main body on the downstream side in the splashing direction, and a scooping faces, that are bent forward in the rotating direction, are formed at the tips of blades, and escape faces, that are opened backward in the rotating direction at a specified angle, are formed. CONSTITUTION:A drain-splash guard plate 11 is furnished right above a splasher main body 2. Drain water A is scooped by blades 15 with the rotation of the splasher 2 and tends to splash backward in the rotating direction, however, it strikes on to a splash wall 13 formed on the guard plate 11. Moreover, as scooping faces 5a, which are bent forward in the rotational direction, are formed at tips of the blades 5, the scooping resistance of the drain water is decreased when the blades 5 scoop the drain water A, resulting in a decrease of water splash noise.

Description

[Detailed description of the invention] [Object of the invention] (Industrial application field) The present invention provides a drain water yP that scrapes out drain water and scatters it.
The present invention relates to a four-loss device, and particularly to a drain water splashing device that can reduce the collision sound caused by drain water splashing backward in the scooping direction and the draining sound when drain water is scooped out.

(Prior Art) In general, in a vertical air conditioner, a drain water scattering device as shown in Fig. 1O is used to scatter drain water dripping from the evaporation gap to the ms unit to increase the heat exchange efficiency of the condenser. is included.

As shown in the figure, the drain pan a has steamer J [(not shown)
Drain water A dripping from the drain water A is stored, and this drain water A is scraped out by a rotationally driven splasher b above the drain water A and is splashed into a condenser (not shown) as cooling water.

An annular plate d is attached to the outer periphery of the rotation axis C of the splasher b, and blades e for scraping out the drain water A are provided on both open surfaces of the plate d. The blades e extend radially at equal intervals in the circumferential direction of the plate d.

Therefore, the drain water A scraped out by the blade e
is sprayed as cooling water to the a2wI device to cool it down.

(Problem to be Solved by the Invention) By the way, when the splasher b is rotationally driven, the drain water A scraped out from it is scattered forward in the scraping direction, and also splashed backward in the scraping direction due to the rotational movement of the splasher b. Mflt will be done.

In particular, the drain water A scattered backward in the scraping direction is subjected to centrifugal force and falls to the drain water surface f.
was hit hard. Therefore, there was a problem in that the impinging sound (squealing sound) of the drain water A became louder, the fluctuation of the water level became larger, and the sound of water cutting by the blade e became unsteady and became noisy.

In addition, the tip of the blade e extends radially and linearly from the center of rotation, so that when the tip of the blade e sinks into the water surface f without scraping out the drain water A, the tip of the blade e A webbed surface g approximately perpendicular to the water surface f was formed on the surface. Therefore, there was a problem in that the resistance to draining the drain water was increased, and the draining sound (f) was increased.

The present invention has been devised to effectively solve the above problems.

SUMMARY OF THE INVENTION An object of the present invention is to provide a drain water splashing device that can reduce the collision sound caused by drain water splashing backward in the scraping direction and the water splashing sound of the blade.

[Structure of the Invention] (Means for Solving the Problems) The present invention includes a splasher body that scrapes out drain water stored in a drain pan and splashes it into a condenser, and a splasher body that scrapes out drain water stored in a drain pan and splashes it into a condenser, and a splasher body that scrapes out drain water stored in a drain pan and splashes it into a condenser. It is constructed from a drain scattering prevention plate located at the drain plate to prevent drain water from scattering backward in the scraping direction.

Further, the splasher main body has blades arranged at equal intervals in the circumferential direction for scraping out the drain water, and a rake face that is sequentially folded back in the forward direction in the rotational direction is formed at the tip of the blade. A relief surface that is open at a predetermined angle rearward in the rotational direction is formed on the back surface of the surface.

(Function) Since the drain scattering prevention plate is positioned near the outer periphery of the splasher body and at the rear in the scraping direction, the drain water forced backward in the scraping direction by the rotation of the splasher collides with the prevention plate. However, the drain water is prevented from scattering backward in the scraping direction.

In addition, a rake face that is folded forward in the rotational direction is formed at the tip of the blade, and a flank face that is open at a predetermined angle is formed at the rear in the rotational direction, so the resistance to scrape out drain water is reduced and the water drains. You can reduce the sound.

(Example) Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, drain water A dripping from an evaporation gap (not shown) is stored in a drain pan 1, and a condenser (not shown) is placed on top of this drain pan 1 to scrape out the drain water A and use it as cooling water. ) is provided with a splasher body 2 that is rotatably driven to cause splashing.

This splasher body 2 has an annular plate 4 on the outer periphery of its rotating shaft 3, and helically curved blades 5 arranged in the circumferential direction are attached to both sides of the plate 4.

In particular, a drain scattering prevention plate 11 is provided near the outer periphery of the splasher body 2 and positioned at the rear in the scraping direction.

This drain scattering prevention plate 11 is attached to the fixed side 12 of the frame etc.
and is suspended directly above the splasher body 2 at an interval that allows rotation of the splasher body 2,
In the front part, there is a drain collision wall 13 that is steep in the vertical direction.
is formed.

Since the drain scattering prevention plate 11 is formed right above the splasher main body 2 in this way, the drain water A that is scraped out by the blade 5 by the rotational movement of the splasher body 2 and is about to scatter backward in the scraping direction is prevented from being scattered by the drain water prevention plate 11. The drain collides with the drain collision wall 13 formed on the front surface of the drain colliding wall 11 . Therefore, the force of the drain water A is weakened, and no large impact sound is generated against the water surface 14 as in the conventional case.

In addition, FIG. 2 shows that the drain scattering prevention plate 11 is provided and this drain scattering prevention plate 11 is provided at any position behind the splasher body 2 in the scraping direction, and the drain scattering prevention plate 11 is provided. 11 is provided at one of five positions from the vertical direction to the horizontal direction.

FIGS. 3 and 4 show an embodiment of a pond for preventing drain water A from scattering backward in the pumping direction.

In FIG. 3, a drain scattering prevention plate 16 that is opened in an arc shape is provided along the outer periphery of the splasher body 2 toward the rear in the scraping direction.

Therefore, an arc-shaped drain collision wall 17 is formed on the drain scattering prevention plate 16 so as to be spaced apart from the outer circumference of the splasher main body 2. In FIG. 4, the bottom plate 1a of the drain pan 1 is raised in an arc shape rearward in the scraping direction along the outer periphery of the splasher body 2 to integrally form a drain scattering prevention plate 18. That is, the drain collision surface 19 is formed by raising the rear part of the bottom plate 1a in the scraping direction upward so as to cover the outer peripheral part of the splasher main body 2.

Fig. 5 shows a blade 5 for scraping out drain water A, and the tip of the blade 5 has a rake face 5a that is folded forward in the direction of rotation by one order, and a flank face 5b that is open to the rear in the direction of rotation. is formed.

That is, a rake face 5a that is open at a predetermined rake angle α is formed rearward in the rotation direction with respect to a center line R that passes through the blade tip from the rotation center O. Further, the clearance surface 5b is formed so as to be opened rearward in the rotation direction at a predetermined clearance angle β from the tangent S of the blade tip 11111 to the rotation center OS.

Therefore, the rake face 5a and the flank face 5b form a blade 5 whose tip end angle gradually decreases.

Specifically, the blade 5 is formed into a square shape as shown in FIG. In addition, it may be formed in a triangular shape as shown in FIG. 7, a fan shape as shown in FIG. 8, or a trapezoid as shown in FIG. 9.

The cut surface 5a is not limited to a flat surface, but may be formed in an arc shape or a dogleg shape opening forward in the direction of rotation, and the flank surface 5b can be formed in various shapes such as an arc shape or a trapezoid shape. You may.

In this way, the tip of the blade 5 is folded back forward in the rotational direction to form the rake surface 5a, so that the blade 5
When the drain water A is scraped out, the scraping resistance of the drain water A is reduced, and the draining sound is reduced.

In addition, since the flank 5b that is open to the rear in the rotational direction is formed, the angle of the tip of the blade 5 (π/2−α−β)
becomes smaller. Therefore, the resistance to scraping out the drain water A is reduced, and the draining noise is also reduced in this case. Furthermore, since the drain water A passes along the flank 5b and flows into the next blade 5 at the rear in the rotational direction, the amount of drain water A that is scraped out increases and the scraping efficiency is also improved.

[Effects of the Invention] In summary, according to the present invention, the following excellent effects are achieved.

(1) According to the first aspect, collision noise caused by drain water can be reduced because splashing of drain water to the rear in the scraping direction is prevented.

(2) According to the n-term 2, the water cutting noise caused by the blade can be reduced.

[Brief explanation of drawings]

Fig. 1 is a diagram showing the state of preventing drain water from scattering, Fig. 2 is a diagram showing the mounting position of the drain scattering prevention plate, Figs. 3 and 4 are diagrams showing other embodiments, and Fig. 5 is an enlarged view showing the tip of the blade, FIG. 6 is a view taken along the line v-V in FIG. 5,
Figures 7 to 9 are diagrams showing modifications of Figure 5;
0 and 11 are diagrams showing conventional examples. In the figure, 1 is a drain pan, 2 is a splasher body, 5 is a blade, 5a is a rake face, 5b is a flank face, 11, 16.
18 is a drain scattering prevention plate.

Claims (1)

[Claims] 1. A splasher body that scrapes out drain water stored in a drain pan and splashes it into a condenser; A drain water scattering device equipped with a drain scattering prevention plate for preventing drain water from scattering. 2. The splasher main body has blades arranged at equal intervals in the circumferential direction for scraping out the drain water, and a rake face that is sequentially folded forward in the rotational direction is formed at the tip of the blade. 2. The drain water scattering device according to claim 1, wherein a relief surface is formed on the back surface of the surface and is opened at a predetermined angle rearward in the rotational direction.