JP2593986Y2 - Blade for drainage pump - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blade used for a pump for draining drain water or the like of an air conditioner or the like.

[0002]

2. Description of the Related Art In an indoor unit of an air conditioner, moisture in the air condenses and adheres to a heat exchanger during cooling to generate drain. Since this drain travels down the surface of the heat exchanger along with the surrounding waste, it must be collected and drained.Therefore, a drain pan is placed at the bottom of the heat exchanger, and the drain and drain pan are placed on this drain pan. In addition to collecting garbage and the like accumulated in the tank, the suction port of the pump is arranged in a drain pan, and the pump is driven to discharge the drain outside the room.

Various pumps have been proposed as such a drain pump, and most of them are provided in a pump body having a suction port at a lower end and a discharge port oriented horizontally in a lateral direction. The blades are rotatably provided, and the blades are rotated by a motor fixed to the upper part of the pump body. In addition, the blade has a shaft portion provided with a hole for connecting a motor drive shaft at an upper portion, and the shaft portion is provided with a large-diameter plate-shaped rotary blade in a longitudinal axis direction. I have.

Thus, when the motor is driven to rotate the rotary blade via the shaft, if the drain is collected up to the suction port at the lower end of the pump body disposed in the drain pan, the drain is discharged from the lower end of the rotary blade. It is sucked up, discharged to the outer periphery of the rotating blade by the centrifugal force of the rotating blade, and discharged to the outside from the discharge port of the pump body.

At this time, when air is introduced from the opening at the upper center of the pump body, the drain rising along the inner wall of the pump body forms a free surface in the form of a paraboloid of revolution, and rises. The drain that has reached the upper end is discharged from the discharge port to the outside.

[0006]

In the above conventional drain pump, the drain sucked up to the inside of the rotary blade is
When the kinetic energy is given to the drain by the centrifugal force, and the kinetic energy is converted into pressure energy at the discharge part to perform the pumping action, the centrifugal force rises along the inner peripheral surface of the pump body and a free surface is formed inside. The drain that forms
It will collide with the lower surface of the fixed lid of the pump body while rotating at high speed. At this time, the drain receives a large flow resistance on the lower surface of the lid, and the free surface of the paraboloid of revolution is disturbed, agitated, and swells from the free surface.

Therefore, the drain flow discharged in the outer peripheral direction by the rotating blade is disturbed, and the kinetic energy due to the rotation of the rotating blade cannot be sufficiently transmitted to the drain.
Therefore, there is a drawback that the pump efficiency is reduced and the head is reduced. In addition, the drain flow is disturbed by the collision with the lower surface of the lid to generate noise, which is a factor that hinders noise reduction which is extremely important as an indoor unit of an air conditioner. Furthermore, the drain flow collides with the lower surface of the lid, and a part of the liquid flows into the inside of the free surface. As a result, a drain flow is generated toward the air introduction opening provided at the center of the lid, and the drain is introduced into the air. Since the ink is discharged to the outside through the use opening, it has a disadvantage that it has an adverse effect on the motor that rotationally drives the blades and also has an adverse effect on other devices in the air conditioner.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a vane for a drain pump which improves pump efficiency, has a high head and low noise, and does not discharge drain from an air inlet of a pump body. I do.

[0009]

According to the present invention, in order to solve the above-mentioned problems, a lower warhead and a flat auxiliary wing are provided on a center shaft provided with a motor shaft mounting portion on an upper side, and above the lower warhead. Provides a plurality of flat large-diameter main wings radially ,
By providing a donut-shaped disk on the outer peripheral portion of the upper edge of the main wing, a blade for a drainage pump is configured.
The pump efficiency is improved, the pump has a high head and low noise, and the drain is not discharged from the air inlet of the pump body.

[0010]

According to the present invention, as described above, when the blades are rotated by the motor, the drain sucked from the lower warhead provided on the center axis and the lower end of the auxiliary wing extends along the inner periphery of the lower lid member. And is sucked into the inside of the large-diameter main wing provided above the auxiliary wing. The drain sucked into the wing
The centrifugal force generated by the rotation of the main wings causes the wings to fly to the outer periphery, and the kinetic energy is converted into pressure energy at the discharge port of the pump and discharged to the outside. At this time, when outside air is introduced into the center of the blade, a parabolic free surface is formed inside the drain water flow that rotates and rises with the lower warhead, the auxiliary wing and the main wing, and the upper end of the drain water flow is It is held down by a donut-shaped disk and guides the drain water flow toward the outer periphery of the main wing, suppressing the flow of drain to the upper part of the blade.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. The blade 1 has an insertion hole 4 into which the rotating shaft 3 of the motor 2 is press-fitted.
And a warhead 6 below the center axis 5.
And a flat auxiliary wing 7. Above the auxiliary wing 7,
In the embodiment shown in FIG. 1, four flat large-diameter main wings 8 are provided radially, and a donut-shaped disk 11 having a center opening 10 is provided on the outer peripheral portion of the upper edge 9 of the main wing 8.

When the blade 1 is used, the blade 1 is incorporated in a lower lid member 12, as shown in FIG. The lower lid member 12 has a suction port 13 at a lower end, a suction cylinder 14 having an inner circumference larger than the outer diameter of the auxiliary wing 7, and a pump having an inner circumference larger than the outer diameter of the main wing 8. It comprises a chamber 40 and a water storage chamber 19 communicating with the pump chamber 40. On the upper surface of the lower lid member 12, a pump body 15 is provided with a tapping screw 16.
, The pump body 15 includes a cylindrical portion 17 that accommodates the central shaft 5 of the blade 1, and the discharge path 1 of the lower lid member 12.
A drainage pipe 22 having a discharge port 18 connected to the discharge port 18 and a pipe 20 connected to the outside is provided.

At the upper end of the cylindrical portion 17, there is provided a through hole 24 through which the rotating shaft 3 is inserted and the atmosphere is introduced into the pump chamber 40, and a partition wall 25 is formed on the upper surface of the pump body 15 so as to surround the cylindrical portion 17. Is provided. In addition, a drain plate 27 is provided on the rotating shaft 3 so as to cover the through hole 24 of the cylindrical portion 17.

The drain pump 30 having the above structure is provided on the bottom surface of the drain pan in the indoor unit of the air conditioner with its suction port 13
Are fixed to be close to each other, and the operation of the air conditioner causes the drain generated on the heat exchanger surface of the indoor unit to drip downward and accumulate in the drain pan together with the garbage. When the water level of the drain reaches the suction port 13, By the rotation of the blade 1 fixed to the rotation shaft 3 by the drive of the motor 2, the drain is scraped up at the lower end of the auxiliary wing 7 and rises along the inner peripheral surface of the suction cylinder 14.

The drain sucked up by the auxiliary wing 7 is sucked into the inside of the main wing 8 through the lower warhead 6 of the central axis 5 and is blown to the outer periphery by a large centrifugal force due to the rotation of the main wing 8 to give a large kinetic energy. obtain. This drain
Pushed into the discharge passage 19 communicating with the pump chamber 40,
The kinetic energy of the drain is converted to pressure energy,
The water is pushed up from the drain port 18 to the discharge port 21 of the drain cylinder 22, and is discharged outside by the pipe 20.

In the suction cylinder 14 and the pump chamber 40, the drain water flow swept up by the auxiliary wings 7 and the main wings 8 passes through a through hole 24 provided at the upper end of the cylindrical portion 17 of the pump body 15.
2 forms a parabolic free surface 31 as shown by a chain line, which is a boundary surface between the atmosphere and the gas-liquid mixed layer 32 below the through-hole 24 in FIG. Further, a boundary surface 33 between the gas-liquid mixture layer 32 and the drain water is formed at the tip of the auxiliary wing 7. At this time, the atmosphere is introduced into the center of the main wing 8 and the auxiliary wing 7 from the center opening 10 of the donut-shaped disc 11. The upper end of the drain water flow forming the parabolic free surface 31 is pressed by the lower surface of the donut-shaped disk 11 and serves to guide the drain water flow toward the inner peripheral wall of the pump chamber 40. Thereby, the free surface 31 of the drain water flow in the pump chamber 40 is stable without breaking,
Moreover, since the tip of the lower warhead 6 is provided in the gas-liquid mixing layer 32, the drain water flow is not disturbed, and the centrifugal force due to the rotation of the blade 1 can be reliably applied to the drain water flow. , That is, a higher head is achieved, and the degree of freedom of installation of the indoor unit is increased. Further, since the drain water flow is stabilized, noise due to stirring of water is reduced, and a low-noise air conditioner can be obtained.

Since the donut-shaped disk 11 prevents the drain from moving upward, the cylindrical portion 17
, And drain water discharged from the through hole 24 can be almost eliminated. Therefore, the drain discharged from the through hole 24 does not cause any drain to enter the motor 2 despite the presence of the draining plate 27 and the like, and it is possible to prevent adverse effects on peripheral devices.

[0018]

[Effect of the Invention] The present invention is configured as described above.
Since the lower warhead is provided in the gas-liquid mixture layer, the gas-liquid mixture layer flows without abrupt shape change, so that noise during drainage can be reduced. In addition, the upper end of the drain water flow that forms a parabolic free surface formed by the rotation of the blade is suppressed by the donut-shaped disk, and the free surface is smoothly guided to the outer peripheral direction without collapse, and the upper air Since the water flow to the introduction hole can be eliminated, and the drain water flow is not disturbed, the pump efficiency is improved, and a higher head can be achieved. Further, even if the clearance between the pump main body and the donut-shaped disk of the blade is increased, the water flow is suppressed by the donut-shaped disk, and a high-efficiency, high-head pump action can be obtained.

Further, the noise caused by the agitation of the drain water flow is reduced, and the water flow to the air inlet is eliminated, so that the discharge of the drain from the air inlet is stopped. Adverse effects can be eliminated.

[Brief description of the drawings]

FIG. 1 is a perspective view of an embodiment of the present invention.

FIG. 2 is a sectional view of a drainage pump to which the blade of the present invention is applied.

[Explanation of symbols]

 Reference Signs List 1 blade 2 motor 3 rotating shaft 4 insertion hole 5 center axis 6 warhead 7 auxiliary wing 8 main wing 9 upper edge 10 center opening 11 donut-shaped disk 12 lower lid member 13 suction port 14 suction cylinder 15 pump body 16 tapping screw 17 Cylindrical part 18 Drain port 19 Discharge path 20 Pipe 21 Discharge port 22 Drain cylinder 24 Through hole 25 Partition wall 30 Drain pump 31 Free surface 32 Gas-liquid mixing layer 33 Boundary surface between gas-liquid mixing layer and drain water 40 Pump room

──────────────────────────────────────────────────続 き Continuing on the front page (72) Katsuya Taguchi 535 Sasai, Sayama-shi, Saitama Pref. Sagimiya Co., Ltd. Sayama Works (56) References Japanese Utility Model Sho 60-116094 (JP, U) Japanese Utility Model Hei 2 69098 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) F04D 29/18-29/38

Claims (1)

(57) [Scope of request for utility model registration] 1. A provided below bullet head and flat aileron to the central axis having a motor shaft attachment portion upwardly and above the said lower warhead section providing a plurality of plate-shaped large-径主vanes radially together
A donut-shaped disk provided on the outer periphery of the upper edge of the main wing.