KR20130024729A - Drain pump - Google Patents

Abstract

PURPOSE: A drainage pump is provided to prevent vibration or noise even lowering the height of a ring-shaped wall member, thereby improving a discharging capacity and operating quietly. CONSTITUTION: A drainage pump comprises a motor, a rotary blade(70), and a housing unit. The rotary blade is connected to an output shaft of the motor. An inlet is formed in the lower part of the housing unit, and an outlet is formed in a side of the housing unit. The housing unit accommodates the rotary blade to be freely rotated. The rotary blade includes a shaft unit(52) connected to the output shaft of the motor, a plurality of plate-shaped large blades(60A,60B) extended in a radial direction from a shaft unit, and a plurality of plate-shaped small blades(54) connected to the lower parts of the large blades.

Description

Drain Pump {DRAIN PUMP}

The present invention relates to a drain pump for draining drain water in a drain pan that receives water condensed in an indoor heat exchanger of an air conditioner.

Conventionally, in the air conditioner of the type embedded in the ceiling of a room, the drain pan which receives the drain water condensed on the surface of the indoor heat exchanger of an air conditioner is equipped. In order to drain the drain water in this drain pan outside, a drain pump (drain pump) is used.

One example of a drain pump for use in an air conditioner is shown in FIG. 17. In FIG. 17, (a) is a front view which breaks and shows a part of drain pump, (b) is a top view of an example of the rotary blade used for the drain pump shown in (a), (c) is shown in (b) It is a front view of the rotating blade to mention (refer patent document 1).

The drain pump which shows the whole by the code | symbol 1 has the motor 10 and the pump main body 30 attached to the motor 10 via the bracket 20. As shown in FIG. The pump main body 30 is made of plastic, and has a housing 40 having an upper opening, and a cover 32 covering the upper opening of the housing 40. The housing 40 has a pipe-shaped suction port 42 having an opening 43 at its lower end, a pump chamber 44 formed therein, and a discharge port 46 protruding toward the side. The cover 32 is formed integrally with the bracket 20, and is connected to the housing 40 with the seal member 34 sandwiched between the housing 40.

In the pump chamber 44 of the housing 40, the rotary blade 50 which rotates by the motor 10 is accommodated. The rotary blade 50 includes a shaft portion 52, a plurality of flat blades 60 in the radial direction extending from the outer peripheral portion of the shaft portion 52 (four in the illustrated example), and each large blade 60. It is connected to the lower edge of the and has a plurality of flat-shaped small-diameter wings 54 (four equal to the large-diameter wings 60) inserted into the suction port 42. .

The shaft portion 52 penetrates the through hole 36 formed in the center of the cover 32 and protrudes toward the motor 10 side, and the motor 10 is provided in a hole 53 provided along the central axis of the shaft portion 52. The drive shaft 12 of is inserted and fixed. On the upper surface of the shaft portion 52, a water cutting disk 14 is attached, and the water cutting disk 14 has drain water ejected from the through hole 36 of the cover 32 by the motor 10. It prevents from flying to the side.

The lower edge of the large-diameter wing 60 is formed in a tapered shape, and the lower edge is connected by a disk-shaped annular member 62 having an opening 63. An auxiliary wing 68 (four in the illustrated example) is provided between the neighboring large-diameter wings 60 and 60, and the auxiliary head 68 and the large-diameter wing 60 allow the pump head to be lifted. It can be secured. The outer edges of the large-diameter wing 60 and the auxiliary wing 68 are connected by a ring-shaped wall member 64. The position of the upper edge of the ring-shaped wall member 64 is lower than the position of the upper edge of the large-diameter wing 60 and the auxiliary wing 68. Since bubbles generated in the drain water by the rotation of the large-diameter wing 60 flow smoothly through the ring-shaped wall member 64 to the discharge port 46, the bubble to the bottom 35 of the cover 32 Collision is mitigated and noise is reduced. In addition, when the drain pump 1 stops, water returning from the discharge port 46 to the pump chamber 44 of the housing 40 strikes the ring-shaped wall member 64 and the ring-shaped wall member 64. Due to the slow diffusion, the noise caused by the feedback water is also reduced.

The lower end portion of the ring-shaped wall member 64 is annularly connected to an annular member 62 that connects the large-diameter wing 60 and the lower edge of the auxiliary wing 68, by the annular member 62. The liquid surface of the drain water rising from the suction port 42 is divided up and down substantially, the amount of water in contact with the large-diameter wing 60 decreases, and the amount of bubbles generated decreases. The lower edges of the large-diameter wing 60 and the auxiliary wing 68 are formed to be inclined toward the small-diameter wing 54, and the annular member 62 is also formed in a dish shape in accordance with this inclination.

The operation of the drain pump 1 is set to stop after the main switch of the air conditioner is turned off, when the falling water from the surface of the evaporator which is the heat exchanger is almost completed, and the drainage is completed. When the drain pump 1 stops, the drain water in the upward drain pipe passing through the outside of the indoor unit flows in the reverse direction through the discharge port 46 to return to the drain pump 1, and the drain in the drain pump 1 returned from the drain pipe. Water enters and is stored in the drain pan.

Japanese Patent Application Laid-Open No. 2006-29214

In the above conventional drainage pump, the ring-shaped wall member 64 is provided around the outer side of the blade to prevent the return of the drain water from the drainage pipe and the quietness of the drainage pump. The ring-shaped wall member 64 acts like a wall with respect to the water swept away by the wing, causing the drainage performance (discharge capacity) to deteriorate. It is considered that the height of the ring-shaped wall member 64 is lowered to avoid the lowering of the discharge capacity, but in this case, water easily enters the space between the blades on the rear side in the rotational direction, resulting in high noise and vibration of the drain pump. Has a problem.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object thereof is to provide a drainage pump that has achieved both an improvement in discharge capacity and quietness during operation.

In order to solve the above problems, the drainage pump according to the present invention, the motor, a rotary blade connected to the output shaft of the motor, the inlet is provided on the lower end and the discharge port is provided on the side, the rotation blade freely rotate And a housing for accommodating the blade, wherein the rotary blade includes a shaft portion connected to an output shaft of the motor, a plurality of plate-shaped large diameter wings extending in a radial direction from the shaft portion, and a plurality of plate shapes connected to the lower edge of the large diameter blade. A drain pump having a small diameter wing, characterized in that a guide portion is provided at the edge of the large diameter wing to guide the water flow agitated by the large diameter wing toward the outside of the large diameter wing.

In this drainage pump, the guide portion provided on the edge of the large diameter blade, for example, the upper edge portion of the large diameter blade and the outer edge portion of the large diameter blade, or the upper edge portion and the outer edge portion of the large diameter blade. It can be set as the edge part provided in one.

In addition, a guide part for guiding the water flow of the small-wing blades to the outside of the small-wing blade can also be provided in the small-wing blade. This guide part can also be comprised by the edge part provided in the outer edge part of a small diameter blade | wing.

According to the drainage pump of this invention, since the water which the large diameter blade | wing whisks is guided outward by the guide part provided in the edge part of the large diameter blade, it becomes difficult to flow into the space downstream of the large diameter blade, and gaseous liquid液) Vibration or noise can be reduced when the interface is in contact with large diameter wing. Therefore, even if the height of the ring-shaped wall member is reduced, vibration and noise can be suppressed, so that the discharge capacity can be improved and the quietness at the time of operation can be achieved.

Moreover, when providing a guide part in a small diameter wing, the quietness at the time of starting especially improves.

BRIEF DESCRIPTION OF THE DRAWINGS The figure which shows the 1st Example of the rotary blade used for the drain pump by this invention, (a) is a perspective view, (b) is a partial enlarged plan view, (c) is a front view.
Figure 2 is a view showing a second embodiment of the rotary blade used in the drain pump according to the present invention, (a) is a perspective view, (b) is a partially enlarged plan view, (c) is a front view.
Figure 3 is a view showing a third embodiment of the rotary blade used in the drain pump according to the present invention, (a) is a perspective view, (b) is a partially enlarged plan view, (c) is a front view.
4 is a view showing a comparative example for explaining the effect of the rotary blade used in the drain pump according to the present invention, (a) is a perspective view, (b) is a partially enlarged plan view, (c) is a front view.
5 is a view showing a modification of the rotary blade of FIG. 1, (a) is a partially enlarged plan view, (b) is a partially enlarged front view.
6 is a view showing a modification of the rotary blade of FIG. 1, (a) is a plan view, and (b) is a front view.
7 is a view showing a modification of the rotary blade of FIG. 1, (a) is a plan view, and (b) is a front view.
8 is a view showing a modification of the rotary blade of FIG. 1, (a) is a plan view, and (b) is a front view.
9 is a view showing a fourth embodiment of the rotary blade used in the drainage pump according to the present invention, (a) is a plan view, (b) is a front view, (c) is a bottom view.
Fig. 10 is an explanatory view of the rotary blade shown in Fig. 9, (a) is a plan view, (b) is a front view, and (c) is a D-D cross sectional view of (b).
(A) is AA sectional drawing of FIG. 10a), (b) is BB sectional drawing, (c) is CC sectional drawing.
12 is a perspective view in which part of the rotary blades of the fourth embodiment is notched;
Fig. 13 shows a fifth embodiment of a rotary blade for use in a drain pump according to the present invention, (a) is a plan view, (b) is a front view, and (c) is a DD sectional view of (b).
Fig. 14 is a sectional view of the rotary blade shown in Fig. 13, (a) is a sectional view taken along AA of Fig. 13 (a), (b) is a sectional view taken along BB, and (c) is a sectional view taken from CC.
15 is a perspective view in which part of the fifth embodiment is notched;
Fig. 16 is a graph showing the effects of the present invention.
17 shows an example of a conventional drain pump.

EMBODIMENT OF THE INVENTION Hereinafter, based on an accompanying drawing, the Example of the drain pump by this invention is described. 1 to 3 show an embodiment of the invention. Prior to the description of the present embodiment, an example of a rotary blade having no structure of the present invention will be described with reference to FIG. And the same code | symbol is attached | subjected to the part common to the conventional rotary blade shown in FIG. The edge part of the large diameter blade 60 and the auxiliary blade 68 of this rotary blade 100 is not provided. Moreover, the ring-shaped wall member which connects the outer peripheral part of the large diameter wing | blade 60 is not provided, Instead, the ring which turned in the outer peripheral part of the annular member 62 toward the direction substantially parallel to the axial direction of the axial part 52 is provided. The shape flat surface 164 is formed. With such a structure, the discharge capacity can be improved, but the flow F4 of the drain water entering the outside of the large-diameter wing 60 and the auxiliary wing 68 easily enters the space behind the rotational direction. As a result, the gas-liquid boundary surface S is formed above the large-diameter wing 60 and the auxiliary wing 68, and the gas-liquid boundary surface S is in contact with the large-diameter wing 60 and the auxiliary wing 68. As a result, it is observed that vibration and noise occur.

(Embodiment 1)

BRIEF DESCRIPTION OF THE DRAWINGS The figure which shows an example of the rotary blade used for the drain pump by this invention, (a) is a perspective view which shows the whole rotary blade, (b) is a part of the rotary blade shown to (a) (C) is a front view of the rotating blade shown to (a). In description of the Example of this invention, the same code | symbol is attached | subjected about the structure common to the conventional rotary blade shown in FIG. 17, and the rotary blade of the comparative example shown in FIG. 4, and detailed description is abbreviate | omitted again. Incidentally, reference numerals 60A and 68A are attached to the large diameter wing and the auxiliary wing of the rotary wing 70 of this embodiment.

The rotary blade 70 of the drain pump shown in FIG. 1 has an end portion 72 at the upper end edge 71 and an outer edge 81 at the edge portion of the large-diameter blade 60A. 82) is provided. In addition, in this example, not only the large diameter wing 60A but also the auxiliary wing 68A, the edge part 74 is provided in the upper edge 73 and the edge 84 in the outer edge 83. The end portions 72 and 74 are formed over the entire length of the upper edge portions 71 and 73 of the respective blades 60A and 68A. The end parts 72 and 74 have an effect | action which splashes drain water upward and guides it to the upper and outer sides. In addition, the edge parts 82 and 84 are formed over the full length of the outer edge parts 81 and 83 of each blade 60A, 68A. As indicated by reference numeral F1, the end portions 82 and 84 serve to guide the drain water in the radially outward direction of the rotary blade 70. Due to the synergistic action of the end portions 72, 74, 82, and 84, the position of the gas-liquid boundary surface of the drain water expands to the dome shape from the conventional S to the outside and becomes a position represented by S '. As shown in the figure, vibration and noise can be reduced because it becomes a degree of being applied to the outer end of the blade.

In addition, at the outermost circumference of the annular member 62, a cylindrical wall member 64 connecting the large diameter wing 60 and the outer circumferential end of the auxiliary wing 68 as provided in the conventional example shown in FIG. 17 is provided. It is not provided, and the annular flat surface 164 which faces the direction substantially parallel to the axial direction of the axial part 52 is formed. With this structure, the discharge capacity can be improved. However, as in the example shown in Fig. 4, since the drain water easily flows into the space between the blades in the rearward direction of rotation, noise and vibration increase. In the present embodiment, as described above, since the drain water is guided outward to the end portions 72, 74, 82, and 84 of the respective blades 60A, 68A, even if such an annular flat surface 164 is provided, Noise and vibration can be suppressed. Further, by providing the annular flat surface 164, the drain water flow f (see FIG. 5) that rises along the bottom surface of the annular member 62 is the outer edge of the large-diameter wing 60A and the auxiliary wing 68A. It does not interfere with the drain flow (F1) flowing over the part, thereby achieving the effect that the generation of bubbles is suppressed.

(Second Embodiment)

2 is a view showing another example of the rotary blade used in the drain pump according to the present invention, (a) is a perspective view showing the entire rotary blade, (b) is a part of the rotary blade shown in (a) (C) is a front view of the rotating blade shown to (a). Incidentally, reference numerals 60B and 68B are attached to the large diameter wing and the auxiliary wing of the rotary wing 80 of this embodiment.

In the rotary blade 80 of the drain pump shown in FIG. 2, the edge part 82 is provided only in the outer edge part 81 of the edge part of the large diameter blade 60B. Moreover, the edge part 84 is also provided in the outer edge part 83 of the auxiliary blade 68B. The edge parts 82 and 84 are formed over the full length of the outer edge parts 81 and 83 of each blade 60B, 68B. As shown by F2, the edge parts 82 and 84 serve to guide the drain water to the radially outer side of the rotary blade 80. Thereby, the operation | movement which drain water returns from the side in the space between the large diameter blade 60 and the auxiliary blade 68 of the rotation direction back can be suppressed, and a noise and a vibration can be reduced.

(Third Embodiment)

Fig. 3 is a view showing a third embodiment of the rotary blade used for the drain pump according to the present invention, (a) is a perspective view showing the whole of the rotary blade, and (b) is a rotation shown in (a). The top view which expands and shows a part of a wing, (c) is a front view of the rotary blade shown to (a). Incidentally, reference numerals 60C and 68C are attached to the large-diameter wing and the auxiliary wing of the rotary wing 90 in this embodiment.

In the rotary blade 90 of the drain pump shown in FIG. 3, the edge part 72 is provided in the upper edge 71 of the edge of the large diameter blade 60c. Moreover, the edge part 74 is also provided in the upper edge 73 of the auxiliary blade 68C. The end portions 72 and 74 are formed over the entire length of the upper edge portions 71 and 73 of the respective blades 60c and 68C. The end parts 72 and 74 have an effect | action which splashes drain water upwards and guides them upwards and outwards. Therefore, compared with the case where the end parts 72 and 74 are not provided, the operation | movement which drain water returns to the space between the large diameter blade 60c of the rotation direction back, and the auxiliary blade 68C is suppressed, and the noise and water are stirred. Sound can be reduced. In addition, the gas-liquid boundary line moves from the conventional position of S to the position of S "in the radially outer side. The flow of the drain water returning to the outside of the blades 60c and 68c is indicated by F3.

5 is an enlarged view showing a modification of the rotary blades used in the drainage pump according to the present invention. In this rotary blade 100, the edge part 82 of the large diameter blade 60A is formed in the curved surface of a cross-sectional arc so that it may follow the direction which guides water. The rest of the structure is the same as in the first embodiment. When formed in this way, peeling can be reduced when water passes over the edge part 82, and vibration and noise can be reduced more, and since resistance becomes less, power consumption is also reduced. The same effect can be obtained also by forming the edge part 72 in the curved surface of the longitudinal cross section arc in the direction which guides water.

6 to 8 show a modification of the rotary blade of the first embodiment. FIG. 6 shows an example in which a ring-shaped wall member 64 is provided in place of the annular flat surface 164, (a) is a plan view, and (b) is a front view. In the rotary blade 110, the height of the ring-shaped wall member 64 is lower than that of the large-diameter blade 60A, and the noise caused by the water returned is reduced, and the end portions 72, 74, 82 and 84) aims to reduce noise and vibration.

In the example shown in FIG. 7, the outer peripheral part 62a of the annular member 62 which connected the lower edge of 60 A of large diameter wings is projected to the position which opposes the outer edge surface of 60 A of large diameter wings. In this rotary blade 120, the discharge capacity can be improved as compared with the case of providing the ring-shaped wall member 64, and has the advantage that the effect can be close to the ring-shaped wall member 64.

In the example shown in FIG. 8, the outer peripheral surface 62b of the annular member 62 is formed so that it may become the same surface as the outer surface of 60 A of large diameter blades. In the rotary blade 130, there is an advantage that the diameter can be reduced.

The lower the ring-shaped wall member 64 or the smaller the diameter (protrusion amount from the larger diameter wing) of the outer circumferential portion 62a of the annular member 62 is, the better the discharge capacity is. Since the suppressing effect becomes small, the height of the ring-shaped wall member and the diameter of the annular member are selected in consideration of the balance between the effect and the discharge capacity.

(Example 4)

9-12 show the rotary blades of the drain pump which concerns on 4th Example of this invention.

The rotary blade 200 is provided with a shaft portion 210 having a hole 212 is the same as in the previous embodiment.

The large-diameter wings 230 provided in the cylindrical wall member 220 have an end portion 232, and the auxiliary wing 240 also has an end portion 242. In the rotary blade 200 of the present embodiment, the height position of the upper edge of the cylindrical wall member 220 coincides with the height position of the upper edge of the large diameter wing 230 and the auxiliary wing 240, the cylindrical wall member An end portion 222 of the cylindrical wall member is formed on the inner wall surface of the 220.

The effect of the end portion 222 of the cylindrical wall member 220 is to smoothly drain the drain water upwards and outwards to reduce the noise, so that the end portion 232 of the large-diameter wing 230 or the auxiliary wing 240 may be reduced. Same as end 242.

In addition, the small blade 250 of the rotary blade 200 of the present embodiment has an end 252.

FIG. 10: is explanatory drawing of the rotary blade 200, (c) shows the D-D cross section of (b). In FIG. 10C, the small-winged blade 250 rotates in the direction of the arrow R1. When the small-diameter vane 250 in the suction port of the pump main body pumps water by rotation, the water flow flows as indicated by arrow F6, and the effect of reducing noise is produced.

(Fifth Embodiment)

13 to 15 show a rotary blade of the drain pump according to the fifth embodiment of the present invention.

The rotary blade 300 includes a shaft portion 310 having a hole 312.

The height position of the upper edge of the large-diameter wing 330 and the auxiliary wing 340 is formed to be higher than the height position of the upper edge of the cylindrical wall member 320. In this embodiment, none of the cylindrical wall member 320, the large diameter wing 330, the auxiliary wing 340 has an end portion.

The small-winged blade 350 has an end portion 352 similar to the small-winged blade 250 described in the fourth embodiment. As shown in Fig. 13C, the small-diameter wing 350 rotates in the direction of the arrow R1, and when the small-diameter wing 350 pumps by rotation, the water flow is indicated by the arrow F6. Flows together and reduces noise.

It is a graph which compared the noise of the drain pump of this invention which provided the edge part in the small diameter blade, and the conventional drain pump.

The graph shows the rotational speed on the horizontal axis and the noise level on the vertical axis, the broken line shows the conventional one, and the solid line shows the thing of the present invention.

(A) of FIG. 16 shows the state of a suction start, (b) shows a discharge state with a predetermined | prescribed head, and (c) shows the state balanced by a predetermined head.

Although the noise of the drain pump of this invention was shown with (a), (b), (c), although the noise reduction effect of the drain pump of this invention was especially large in the suction start state, it was confirmed by experiment. .

In addition, this invention is not limited to each Example mentioned above. Various modifications can be made.

For example, in the said 1st thru | or 3rd embodiment, although the guide part is provided in both the large diameter blade and the auxiliary blade, you may make it provide the guide part only to a large diameter blade.

In addition, various modifications can be made to the above-described embodiments without departing from the gist of the present invention.

10: Motor
12: drive shaft
40: Housing
42: suction port
46: discharge port
52: shaft portion
54: narrow blade
60A, 60B, 60C: Large diameter wing
62: annular member
68A, 68B, 68C: auxiliary wing
70, 80, 90, 100, 110, l20, 130: rotary wing
72, 74, 82, 84: end portion (guide)
164: annular flat portion
200, 300: rotor blade
210, 310: Shaft
212, 312: holes
220, 320: cylindrical wall member
222, 322: end of the cylindrical wall member
230, 330: Large diameter wing
232, 332: end of the large blade
240, 340: auxiliary wing
242, 342: end of auxiliary blade
250, 350: Narrow wing
252, 352: end of narrow blade

Claims (14)

A motor, a rotary blade connected to the output shaft of the motor, and a suction port is provided at the lower end, and a discharge port is provided at the side, and the housing for rotatably receiving the rotary blade, the rotary blade, the output shaft of the motor A drainage pump having a shaft portion connected to the blade, a plurality of plate-shaped large diameter blades extending radially from the shaft portion, and a plurality of plate-shaped small diameter wings connected to the lower edge of the large diameter blade, wherein the edge of the large diameter blade includes: A drain pump comprising a guide for guiding a stream of water that a large diameter wing stirs outward. The method of claim 1,
The guide portion is an end portion provided on the upper edge portion and the outer edge portion of the large diameter wing. The method of claim 1,
The guide part is a drain pump, characterized in that the end provided on the upper edge of the large diameter blades. The method of claim 1,
The said guide part is an end part provided in the outer edge part of the said large diameter blade, The waste pump characterized by the above-mentioned. The method according to any one of claims 2 to 4,
An auxiliary wing is provided between adjacent large diameter wings, and the auxiliary wing is provided with a guide part having the same aspect as the guide part provided in the large diameter wing. The method according to any one of claims 1 to 5,
An annular member connecting the lower edges of the plurality of large-diameter blades, the outer peripheral portion of the annular member protrudes outward from the outer edge of the large-diameter blade, and an upper surface thereof is roughly aligned with the axial direction of the shaft portion. A drain pump comprising an orthogonal annular flat surface. The method according to any one of claims 1 to 5,
And a ring-shaped wall member for connecting the outer circumferential portions of the plurality of large-diameter blades. 8. The method of claim 7,
A height of the ring-shaped wall member is set to be lower than the height of the large diameter blades. The method according to any one of claims 1 to 5,
The annular member which connects the lower edge part of the said plurality of large diameter blades, The outer periphery of the said annular member protrudes to the position which opposes the outer end surface of the said large diameter blade, The waste pump of Claim 1 characterized by the above-mentioned. 10. The method according to any one of claims 1 to 9,
The said guide part is formed in the curved surface of circular cross section along the direction which guides drain water, The waste pump characterized by the above-mentioned. 11. The method according to any one of claims 1 to 10,
The said small diameter blade, The drain pump provided with the guide part which guides the water stream which the said small diameter blade | wing stirs toward the outer side. 12. The method of claim 11,
The said guide part is an end part provided in the outer edge part of a small diameter blade | wing. And a motor, a rotary blade connected to the output shaft of the motor, a suction port provided at a lower end thereof, a discharge port provided at a side thereof, and a housing configured to freely receive the rotary wing. A drainage pump having a shaft portion connected to an output shaft of the motor, a plurality of plate-shaped large diameter blades extending radially from the shaft portion, and a plurality of plate-shaped small diameter wings connected to the lower edge of the large diameter blades. And a guide part for guiding the water flow stirred by the small-winged blade toward the outside. The method of claim 13,
The said guide part is an end part provided in the outer edge of the said small diameter blade | wing.

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