WO2019111542A1

WO2019111542A1 - Drainage pump rotating blade and drainage pump having same

Info

Publication number: WO2019111542A1
Application number: PCT/JP2018/038470
Authority: WO
Inventors: 克司佐藤; 友也加藤; 永佐藤
Original assignee: 株式会社不二工機
Priority date: 2017-12-07
Filing date: 2018-10-16
Publication date: 2019-06-13
Also published as: JP2019100319A

Abstract

[Problem] To provide a drainage pump rotating blade capable of suppressing noise while effectively increasing water-pumping ability; and a drainage pump having this drainage pump rotating blade. [Solution] A rotating blade 30 of a drainage pump 1 has a shaft part 31, a plurality of large-diameter blades 33 which extend in the radial direction from the shaft part 31, and a plurality of small-diameter blades 34 which are connected to the bottom ends of the large-diameter blades 33. The bottom ends of the plurality of large-diameter blades 33 are connected to one another by a ring-shaped section 36, and the plurality of small-diameter blades 34 are inserted into the opening in the center of the ring-shaped section 36. The rotating blade 30 is configured in a manner such that the spaces between the adjacent large-diameter blades 33 open laterally. In addition, rising flow suppression parts 50 are provided on the front surfaces 33a of the large-diameter blades in order to suppress a rise of the water flowing along the front surfaces.

Description

Rotary blade for drainage pump and drainage pump having the same

The present invention relates to a rotary vane for a drainage pump and a drainage pump having the same.

The air conditioner installed on the ceiling of the room has a drain pan for receiving the drain water condensed on the surface of the indoor heat exchanger, and a drainage pump (drain pump) for discharging the drain water in the drain pan. Such a drainage pump has a drainage pump rotary blade for sucking up drain water.

An example of a drainage pump is disclosed in Patent Document 1. This drainage pump has a rotating blade that sucks up and discharges drain water. The rotary blade is connected between an outer peripheral edge of the large diameter blade and an annular disk provided between the large diameter blade, the small diameter blade, the large diameter blade and the small diameter blade and having an opening (a hole) at the center. And a wall member. In the drainage pump, when the operation is stopped, the return water flowing from the discharge port side to the suction port side is buffered by the wall member, and the drainage pump falls smoothly to the suction port side. As a result, return water does not spout from the top of the pump housing.

Patent No. 3317808

In the drainage pump disclosed in Patent Document 1, the suctioned drain water is pushed in the rotational direction by the large-diameter blades and travels laterally due to centrifugal force, but it strikes the wall member and is discharged upward. Therefore, this drainage pump has a relatively small centrifugal force applied to the drain water, and the pumping capacity is not particularly high. And, by adopting a configuration without such a wall member in the rotary vanes, it is possible to discharge drain water to the side, and it is possible to further increase the centrifugal force. However, part of the drain water may still flow upward, and an improvement is desired in that more drain water is subjected to centrifugal force. Also, the drain water flowing upward mixes with the air drawn in by the rotation of the rotary vanes to generate air bubbles, which also causes noise.

Then, the object of the present invention is to provide a drainage pump rotary vane capable of suppressing noise while effectively enhancing the pumping capacity and a drainage pump having the rotary vane for the drainage pump.

In order to solve the above-mentioned subject, a rotary blade for drainage pumps concerning one mode of the present invention is a rotary blade used for a drainage pump, Comprising: A shaft part and a plurality of large diameter blades which extend in the radial direction from the shaft part A plurality of small diameter blades connected to the lower end of the large diameter blade, and an annular portion connecting the lower ends of the plurality of large diameter blades and having an opening at the center through which the plurality of small diameter blades are inserted. The space between the large diameter blades adjacent to each other is opened to the side, and the surface of the large diameter blades facing the front in the rotational direction is an upward flow suppression that suppresses the rise of water flowing along the surface A part is provided.

In the present invention, it is preferable that the upward flow suppressing portion is at least one or more ridges extending in the radial direction.

In the present invention, preferably, the upward flow suppressing portion is at least one or more plate members intersecting the axial center direction of the shaft portion.

In the present invention, it is preferable that the upward flow suppressing portion is a surface inclined downward or a surface facing downward.

In the present invention, it further includes a plurality of auxiliary blades disposed between the plurality of adjacent large diameter blades and extending in the radial direction, and the surface of the auxiliary blades facing the front in the rotational direction is along the surface It is preferable that an upward flow suppressing portion is provided to suppress rising of flowing water.

In order to solve the above-mentioned subject, a drainage pump concerning other one mode of the present invention has the above-mentioned rotating blade for drainage pumps, a housing which accommodates the above-mentioned rotating blade, and a motor which rotates the above-mentioned rotating blade. It features.

According to the present invention, on the surface of the large diameter blade facing the front in the rotational direction, the upward flow suppressing portion for suppressing the rise of the water flowing along the surface is provided. Since it did in this way, it can suppress that the water pushed in the rotation direction by a large diameter blade flows upward, and can make it flow more water by the side. Therefore, the centrifugal force can be applied to more water to effectively enhance the pumping capacity, and the generation of air bubbles can be reduced to suppress noise.

It is a figure showing a drainage pump concerning a 1st example of the present invention. It is a figure which shows the rotary blade which the drainage pump of FIG. 1 has. It is a figure which shows typically the cross-sectional shape of an upflow suppression part. It is a figure which shows the rotary blade used with the drainage pump which concerns on 2nd Example of this invention. It is a figure which shows the rotary blade used with the drainage pump which concerns on 3rd Example of this invention. It is a figure which shows the rotary blade used with the drainage pump which concerns on 4th Example of this invention.

(First embodiment)
Hereinafter, the configuration of the drainage pump according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 3. The drainage pump which concerns on a present Example is for discharging | emitting the drain water accumulated in the drain pan of the indoor unit of the air conditioner outside as an example. Of course, the application of this drainage pump is not limited to drain water discharge, and can be used for discharge and pumping of various liquids.

FIG. 1 is a view showing a drainage pump according to a first embodiment of the present invention, and in detail, is a front view including a partial cross-sectional view of a lower portion of the drainage pump cut along a plane passing through an axis of a discharge pipe. FIG. 2 is a view showing a rotary vane of the drainage pump of FIG. 1, and FIGS. 2 (a) to 2 (c) are a perspective view, a plan view and a front view in order. FIG. 3: is a figure which shows typically the cross-sectional shape of a rising flow suppression part. In detail, FIG. 3A is a view schematically showing a cross section of the upflow suppressing portion (convex strip having a semicircular cross section) of the first embodiment. 3 (b) to 3 (f) are diagrams schematically showing a cross section of the upflow suppressing portion of the modification of FIG. 3 (a), and in the following, a convex stripe having a rectangular cross section and a triangular cross section Of the ridge, the two ridges of semicircular cross section, the surface inclined downward and the surface facing downward.

As shown in FIG. 1, the drainage pump 1 of the first embodiment has a housing 10, a cover 20, rotating blades 30, a motor unit 40, and an upward flow suppression unit 50. In the present embodiment, the housing 10, the cover 20, the rotary vanes 30, and the upward flow suppressing portion 50 are made of synthetic resin.

The housing 10 integrally includes a main body portion 11, a suction pipe 16, and a discharge pipe 18. The main body portion 11 has a bottom wall portion 12 having an inverted truncated cone shape, and a peripheral wall portion 13 continuously connected to the outer peripheral edge of the bottom wall portion 12. The suction pipe 16 extends downward from the center of the bottom wall 12 and has a suction port 17 directed downward. The discharge pipe 18 extends laterally (leftward in FIG. 1) from the peripheral wall portion 13 and has a discharge port 19 directed to the side. In the present embodiment, the discharge pipe 18 linearly extends laterally, but is not limited thereto. For example, the discharge port may be formed in a substantially L shape or a circular arc shape facing upward. A discharge pipe inlet 15 serving as an inlet to the discharge pipe 18 is provided on the inner circumferential surface 14 of the peripheral wall 13 of the main body 11.

The housing 10 has a space in which a rotary vane 30 described later is disposed, and the pump chamber 25 is formed (defined) by surrounding the space together with the cover 20.

The cover 20 has a substantially disc shape, and is fitted to the upper opening of the main body 11 of the housing 10 to be attached to the housing 10. The shaft portion 31 of the rotary blade 30 is inserted through a through hole 24 provided at the center of the cover 20, and a motor drive shaft 42 of a motor portion 40 described later is connected to the shaft portion 31.

The rotary vane 30 is a drainage pump rotary vane and is rotatably accommodated in the pump chamber 25. The rotary vane 30 has a shaft portion 31, a large diameter vane 33, a small diameter vane 34, and

annular portions

36 and 38. The rotary blade 30 has a plurality of large-diameter blades 33 and small-diameter blades 34 formed in a substantially flat plate shape, and has four each in the present embodiment.

The shaft portion 31 is formed in a cylindrical shape, and a mounting hole (not shown) into which the motor drive shaft 42 of the motor portion 40 described later is fitted is provided at the upper end portion.

The plurality of large-diameter blades 33 extend in the radial direction (radial direction) from the outer peripheral surface of the shaft portion 31. The plurality of large-diameter blades 33 are arranged at equal intervals in the rotational direction. The space between adjacent large-diameter blades 33 is opened laterally. In the present embodiment, the large diameter blade front surface 33a facing forward in the rotational direction R of the large diameter blade 33 and the large diameter blade rear surface 33b facing in the rotational direction R rear are formed in a planar shape. The large diameter vanes 33 are disposed in the pump chamber 25 such that their radially outer end faces the inner peripheral surface 14 of the peripheral wall 13 of the housing 10.

The plurality of small diameter blades 34 are connected to the radially inner portion of the lower end of each large diameter blade 33. The annular portion 36 provided on the lower side has a disk shape, and an opening 37 is provided at the center. The annular portion 36 connects the radially outer portions of the lower ends of the large diameter blades 33 to each other. The annular portion 38 provided on the upper side has a disk shape, and an opening 39 is provided at the center. The annular portion 38 connects the radially outer portions of the upper ends of the large diameter blades 33 to each other. The small diameter vanes 34 pass through the opening 37 of the annular portion 36 and are inserted into the suction pipe 16.

The upward flow suppressing portion 50 is provided integrally with the large diameter blade 33 on the large diameter blade front surface 33 a of the large diameter blade 33. In the first embodiment, the upward flow suppressing portion 50 is a single ridge extending from the outer peripheral surface of the shaft portion 31 to the radial outer end of the large diameter blade 33 (that is, in the radial direction). As shown in FIG. 3A, the upflow suppression portion 50 is formed such that the longitudinal cross section (the cross section along the line XX in FIG. 2C) has a semicircular shape throughout. In addition, it replaces with this upflow suppression part 50, the upflow suppression part 51 which the vertical cross section shown in FIG.3 (b) becomes a rectangular-shaped convex strip, and the vertical cross section shown in FIG.3 (c) is a convex of triangle shape. The upward flow suppression unit 52 formed of a strip may be employed. Alternatively, instead of the upward flow suppressing portion 50, as shown in FIG. 3D, the upward flow suppressing portion 53 formed of a plurality of convex lines may be employed.

Alternatively, as shown in FIG. 3 (e), the large diameter blade front surface 33a has a mountain-shaped vertical cross section extending from the upper end to the lower end, and instead of the upward flow suppressing portion 50 of the ridge, it faces downward. The upward flow suppressing portion 54 formed of the inclined surface 54a may be employed. Alternatively, as shown in FIG. 3 (f), the large diameter blade front surface 33a has a sawtooth-shaped longitudinal cross section, and includes a surface 55a facing downward instead of the upward flow suppressing portion 50 of the ridge. The upward flow suppression unit 55 may be employed. The surface 54a inclined to face downward in FIG. 3 (e) extends in the radial direction, and the angle α with the rotation axis L of the rotary vane 30 is 15 degrees. The angle α is preferably in the range of 10 degrees ≦ α ≦ 45 degrees. The downward surface 55a of FIG. 3 (f) extends in the radial direction, and the angle β with the rotation axis L of the rotary blade 30 is 90 degrees.

The motor unit 40 is accommodated in the motor case 41, and a bracket 44 is attached to an upper end portion of the motor case 41 via a locking portion 43. The bracket 44 is provided with a mounting portion 45 for mounting the drainage pump 1 to another device. The motor unit 40 is fixed to the cover 20 by the mounting member 46.

Next, the operation (action) of the drainage pump 1 of the present embodiment will be described.

When the rotary vanes 30 are rotated by the motor unit 40, drain water is sucked into the pump chamber 25 from the suction port 17. The drain water in the pump chamber 25 is pushed in the rotational direction R by the large-diameter vanes 33, and centrifugal force is generated radially outward. At this time, a part of the drain water tends to flow upward, but it abuts against the upward flow suppressing portion 50 and is led radially outward. This causes more drain water to flow laterally to provide centrifugal force. Then, the drain water flows from the inside to the outside in the radial direction along the large diameter blade front surface 33 a and strikes the inner circumferential surface 14 of the peripheral wall portion 13 of the housing 10. Then, when the large diameter vanes 33 pass through the discharge pipe inlet 15, drain water flows into the discharge pipe inlet 15 and is discharged from the discharge port 19 through the discharge pipe 18.

From the above, according to the drainage pump of the present embodiment, the large diameter blade front surface 33a is composed of one convex line having a semicircular longitudinal cross section that suppresses the rise of the water flowing along the large diameter blade front surface 33a. An upward flow suppression unit 50 is provided. Since it did in this way, it can suppress that the water pushed in the rotation direction R by the large diameter blade | wing 33 flows upward, and can make it flow more water by the side. Therefore, the centrifugal force can be applied to more water to effectively enhance the pumping capacity, and the generation of air bubbles can be reduced to suppress noise. The same effect can be obtained in the upward flow suppressing portions 51 to 55 shown in FIGS. 3 (b) to 3 (f).

Second to fourth embodiments
The configurations of the rotary blades used in the drainage pump according to the second to fourth embodiments of the present invention will be described below with reference to FIGS. 4 to 6.

FIGS. 4 to 6 are, in order, diagrams showing rotary blades used in the drainage pump according to the second to fourth embodiments of the present invention, and in each of the figures (a) to (c) are perspective views in order; It is a top view and a front view. The drainage pump according to the second to fourth embodiments has the same structure as the drainage pump according to the first embodiment described above except for the rotary vanes 30, and therefore, the illustration of the housing 10, the cover 20 and the motor unit 40 and I omit explanation. Further, in FIG. 4 to FIG. 6, the same components as those of the first embodiment described above are designated by the same reference numerals, and the description thereof will be omitted.

The rotary vanes 30A used in the drainage pump according to the second embodiment have an upward flow suppression portion 50A formed of a single convex strip shorter than the upward flow suppression portion 50, and the other parts are the same as the rotary vanes 30. It has a configuration.

The upward flow suppressing portion 50A of the second embodiment is provided integrally with the large diameter blade 33 on the large diameter blade front surface 33a of the large diameter blade 33. The upward flow suppressing portion 50A is a single convex extending in the radial direction, and extends from a location corresponding to the inner peripheral edge of the

annular portions

36, 38 to the radially outer end of the large diameter blade 33. The upward flow suppressing portion 50A is formed such that the longitudinal cross section has a semicircular shape throughout.

The rotary vanes 30B used in the drainage pump according to the third embodiment have an upward flow suppressing portion 50B formed of a flat plate member having a fan shape in a plan view, and the other configuration is the same as that of the rotary vanes 30. Have.

The upward flow suppressing portion 50B of the third embodiment is provided integrally with the large diameter blade 33 on the large diameter blade front surface 33a of the large diameter blade 33. The upward flow suppressing portion 50B has a plan view fan shape whose central angle is 30 degrees with a radius from the shaft portion 31 to the radial outer end portion, and is orthogonal to the rotation axis L which is the axial center direction of the shaft portion 31 It is one flat plate member arranged as described above. The upflow suppression unit 50B may be disposed to intersect the rotation axis L.

In the third embodiment, the upward flow suppressing portion 50B has a fan shape with a central angle of 30 degrees. Besides this, for example, the upward flow suppressing portion 50B is formed in a fan shape having a central angle close to 90 degrees, and the edge 58 at the front in the rotational direction R is the large diameter blade rear surface 33b of the large diameter blade 33 and It may be disposed in the vicinity of the large diameter blade rear surface 33b with a slight gap. Alternatively, a fan-shaped flat plate member having a central angle close to 90 degrees is provided on the large diameter blade rear surface 33b, and the edge at the rear in the rotational direction R is slightly separated from the large diameter blade front surface 33a A configuration may be considered in which it is spaced and disposed near the large diameter blade front surface 33a.

The rotary vanes 30C used in the drainage pump according to the fourth embodiment omit the annular portion 38 provided on the upper side of the rotary vanes 30 of the first embodiment described above, It has the same configuration.

Also in the drainage pumps according to the second to fourth embodiments, the same effects as those of the drainage pump of the first embodiment described above are obtained.

In the first embodiment described above, the rotary vanes 30 are configured to have the large diameter vanes 33 and the small diameter vanes 34. However, even in the configuration in which auxiliary vanes extending in the radial direction are further provided between the adjacent large diameter vanes 33 Good. Furthermore, a configuration may be employed in which an upward flow suppression unit similar to the upward flow suppression unit 50 is provided on the front surface of the auxiliary blade that faces the front in the rotational direction R of the auxiliary blade. The same applies to the second to fourth embodiments.

In the first embodiment described above, the rotary vane 30 is configured to have two

annular portions

36 and 38, but may be configured to have three or more annular portions. In this configuration, large diameter blades are disposed between the annular portions. The same applies to the second to fourth embodiments.

Although the embodiments of the present invention have been described above, the present invention is not limited to these examples. Those skilled in the art may appropriately add, delete, or change the design elements from the above-described embodiment, or appropriately combine the features of the embodiment, as long as the gist of the present invention is included. Included in the scope of the invention.

DESCRIPTION OF SYMBOLS 1 ... Drain pump, 10 ... Housing, 11 ... Body part, 12 ... Bottom wall part, 13 ... Peripheral wall part, 14 ... Inner peripheral surface, 15 ... Discharge pipe inlet, 16 ... Suction pipe, 17 ... Suction port, 18 ... Discharge Pipe 19 19 discharge port 20 cover 24 through hole 25

pump chamber

30, 30A, 30B, 30C rotary blade 31 shaft portion 33 large diameter blade 33a large diameter blade front surface 33b: large diameter blade rear surface, 34: small diameter blade, 36, 38: annular portion, 37, 39: opening, 40: motor portion, 41: motor case, 42: motor drive shaft, 43: locking portion, 44: bracket , 45: mounting portion, 46: mounting member, 50 to 54: upward flow suppressing portion, 54a: inclined surface facing downward, 55a: surface facing downward, 58: edge, 50A, 50B, 50C: rising Flow suppression unit, R: Direction of rotation

Claims

A rotating blade used for a drainage pump,
With the shaft,
A plurality of large diameter blades extending in the radial direction from the shaft;
A plurality of small diameter blades connected to a lower end of the large diameter blade;
And an annular portion having a central opening provided for connecting the lower ends of the plurality of large-diameter blades and through which the plurality of small-diameter blades are inserted.
The space between adjacent large-diameter blades is open to the side,
An upstream-flow suppressing portion is provided on a surface of the large-diameter vane that faces the front in the rotational direction, the upflow suppressing portion configured to suppress the rise of water flowing along the surface.
The rotary vane for a drainage pump according to claim 1, wherein the upward flow suppressing portion is at least one or more convex portions extending in the radial direction.
The rotary vane for a drainage pump according to claim 1, wherein the upward flow suppressing portion is at least one plate member intersecting the axial center direction of the shaft portion.
The rotary vane for a drainage pump according to claim 1, wherein the upward flow suppressing portion is a surface inclined to face downward or a surface facing downward.
It further comprises a plurality of auxiliary blades disposed between the plurality of adjacent large diameter blades and extending in the radial direction,
The upward flow suppression part which suppresses a raise of the water which flows along the said surface is provided in the surface which faces the rotation direction front in the said auxiliary blade, The any one of the Claims 1-4 characterized by the above-mentioned. The rotary pump for drainage pump according to.
A rotary vane for a drainage pump according to any one of claims 1 to 5;
A housing for accommodating the rotating blades;
And a motor for rotating the rotary vanes.