CN1262393A

CN1262393A - Drainage pump

Info

Publication number: CN1262393A
Application number: CN99123160A
Authority: CN
Inventors: 二宫达志; 今井正幸
Original assignee: Fujikoki Corp
Current assignee: Fujikoki Corp
Priority date: 1999-01-27
Filing date: 1999-10-25
Publication date: 2000-08-09
Anticipated expiration: 2019-10-25
Also published as: EP1024297B1; EP1024297A2; ES2173693T3; CN1129717C; JP2000213769A; EP1024297A3; JP4267118B2; DE69900972T2; TW405023B; DE69900972D1; KR100571591B1; KR20000052358A

Abstract

A pump body of a drain pump comprises an intake opening protruded downward and a discharge opening extending to the side. A vane inside the pump body is rotated by a motor. The vane is formed so that the outer peripheral portion of large radius vanes is surrounded by a cylindrical wall member. The height of the cylindrical wall member against the height of the large radius vanes to the upper rim portion is set to be in a predetermined range, which effectively reduces the noise being generated.

Description

Drainage pump

The present invention relates to a kind of drainage pump, specifically, relate to a kind of drainage pump that is used for air conditioner.

When air conditioner moves with refrigerating mode, adhere to after the airborne condensate moisture on the heat exchanger of air conditioner indoor unit, water droplet is fallen on the drainage blade that is contained in the heat exchanger below then.To be collected in the moisture of draining on the blade in order discharging, to need drainage pump of configuration.Invent multiple drainage pump in the past, introduced one of them example below.Drainage pump of the prior art comprises that a bottom has suction port, top and has the housing that opening and sidepiece have floss hole, and enclosure interior is equipped with a rotatable blade.Utilize a motor rotor blade that is fixed to housing opening top by lid.The rotatingshaft of motor rotatably inserts the lid back and is connected with the axle part of blade.Cover a through hole that housing and atmosphere are communicated described.When motor operation makes blade rotation, be stored in the waste water drained on the blade and suck from the suction port of blade lower end, with the pumping that makes progress of its internal surface, then its floss hole from housing is discharged to the outside along housing.

The flat 9-68185 of Japan Patent open file has described a kind of blade that is used for above-mentioned drainage pump.Figure 12 is used to illustrate the integrally-built partial elevation view of traditional drainage pump.Represent that with label 1 overall structure of drainage pump, this drainage pump comprise 10, one pump housings 30 by the framework 20 of motor 10 bottoms of a motor.Framework 20 and a lid 32 that constitutes the top of pump case are one.Lid 32 links to each other with a housing 40 by a Sealing 34.Housing 40 is made of plastic material, and it comprises 42, one pump chambers 44 of a suction port and a floss hole 46.

Be contained in rotation blade 50 in the housing 40 and comprise the little spoke blade 54 of an axle spare 52 and a plurality of plate shapes, these small leaf stretch out along the diametric(al) that it is centered close on the axis of a part 52.In the accompanying drawings, rotation blade has four small size bar blades 54.The through hole 36 of axle part 52 through covering 32 middle parts reaches motor 10.Hole 36 is positioned at covers 32 central position.The rotating shaft 12 of motor 10 is inserted in the hole on the part 52.A water diversion disk 14 is contained on the upper surface of a part 52, has so just avoided the waste water of through hole 36 ejections to arrive motor 10.

The small size bar blade 54 of rotation blade 50 is injected in the import 42 of a tubular section of housings 40.The entrance point 43 of import 42 is made conical surface, the internal diameter of this import is diminished towards entrance point.Slightly also there is conical surface 56 end of bar blade.The significantly bar blade 60 of rotation blade 50 is contained in the pump chamber 44 of housing 40.

Figure 13 is the side view of rotation blade 50, and Figure 14 is the detailed view of the part B of Figure 13, and Figure 15 is the top view of rotation blade 50, and Figure 16 (A) is (B) with the A-A that (C) represents along Figure 15, the sectional drawing that B-B or C-C line are done.

Have an axle spare 52 on the rotation blade 50, and the template that radially extends outwardly from the periphery of axle spare 52 bar blade 60 significantly.The lower edge of bar blade 60 is significantly done tapered, and described lower edge is connected with a dish-type ring 62 with hollow space 63.Small size bar blade 54 is installed in the significantly below of bar blade 60.With resin will be significantly bar blade 60 and slightly bar blade 54 combine, they include four template blades, but can select the quantity of blade according to design conditions.At each auxiliary blade 68 is housed between the bar blade 60 significantly.Utilize auxiliary blade can improve the head of pump.The center of axle part 52 has the hole 53 of assigning machine shaft.The top of small size bar blade 54 made have conical surface 56.For example the angle of inclination of conical surface 56 is set for 45 degree.

Slightly forming the incline section 57 of an arc shaped surface on the bar blade 54 towards sense of rotation.The radius of curvature of arc incline section 57 approximates the thickness of small size bar blade.Owing to formed incline section 57, thus the noise that produces because of the waste water that stir in the import 42 reduced, and stability of rotation ground that can be by little spoke blade 54 is with in the waste water pumping pump chamber 44.

The outer circumference end of auxiliary blade 68 is connected with big spoke blade 60 by a cylindrical wall spare 64.The height of formed cylindrical wall spare 64 is lower than the upper limb of big spoke blade 60 or auxiliary blade 68.In addition, form a curve slope 70 in the inboard of cylindrical wall spare 64 upper limbs.When adopting this cylindrical wall spare 64, the bubble that produces because of the rotation of big spoke blade 60 can flow to floss hole 46 reposefully, has so also just reduced adhering to the impact of covering the bubble on 32 bottom surfaces 35, thereby has reduced the noise of generation.In addition, even drainage pump is out of service, also can deliver in the cylindrical wall spare 64 turn back in the housing water pump the pump chamber 44 from floss hole 46, utilize the damping effect of cylindrical wall spare 64, bubble progressively spreads, and the noise that backwater causes also just can reduce.In addition, because radius of curvature equals the arc incline section 70 of the thickness of cylindrical wall spare 64 substantially, be formed on the cylindrical wall spare, so the rotation of big spoke blade 60 and auxiliary blade 68 produces the energy that waste water is radially flowed, make overflow the reposefully upper limb of cylindrical wall spare 64 of waste water, this also helps to make the noise of generation to reduce.

The lower end of cylindrical wall spare 64 is be connected with ring part 62 ring-like, and described ring part connects the lower edge of big spoke blade 60 and auxiliary blade 68.In example shown in the drawings, cylindrical wall spare 64 and ring part 62 are an integral body, but they also can form respectively.Utilize ring part 62, the liquid level of the waste water that raises from import 42 is divided into two-part up and down substantially, has so just reduced the water yield that touches big spoke blade, therefore, can reduce the bubble of generation.Ring part 62 on the inner circumference edge in the center portion of rotor blade, an opening 63 is arranged.The inclination form that the lower edge of the auxiliary blade 68 of formation and big spoke blade 60 is become tilt to little spoke blade 64, it is corresponding dish-like that ring part 62 is become with this inclination.

According to the drainage pump structure of prior art, when drainage pump moves, be adjusted to the noise that just can reduce generation less than the upper limb height of big spoke blade by upper limb height with cylindrical wall.But, both there be not the relevant instruction that how to reduce the generation noise effectively in the prior art, there is not the consideration of this respect yet.

When drainage pump moves, just can reduce the noise that produces in continuous effective ground by the height that makes cylindrical wall less than big spoke blades height, the inventor finds the height of cylindrical wall and big spoke blades height is adjusted to a predetermined ratio or ratio is the most effective.

According to the present invention, drainage pump comprises a rotor blade that links to each other with motor transmission shaft and a housing of placing this rotor blade, described rotor blade comprises an axle part that links to each other with motor transmission shaft, along the big spoke blade of a plurality of templates that radially is installed on the described axle part, along the little spoke blade of a plurality of templates that axially is installed in described big spoke blade below, dish-type ring that links to each other with the lower edge of described big spoke blade with hollow space, and a cylindrical wall spare that is used to connect described each big spoke blade outer periphery that is installed on the described dish-type ring outer rim, wherein the height of described cylindrical wall spare and the ratio of big spoke blades height are adjusted to 66% to 83%.

In addition, drainage pump of the present invention also comprises an auxiliary blade on the dish-type ring that is formed in the described cylindrical wall spare.

The height setting of the cylindrical wall spare of drainage pump of the present invention is in 66% to 83% scope of big spoke blade height.Like this, when moving, can reduce by drainage pump the noise of generation effectively.

Fig. 1 is the front view of the rotor blade of drainage pump of the present invention;

Fig. 2 is the planimetric map of the rotor blade of drainage pump of the present invention;

Fig. 3 is the sectional drawing of doing along the A-A line of Fig. 2;

Fig. 4 is the sectional drawing of doing along the B-B line of Fig. 2;

Fig. 5 is the sectional drawing of doing along the G-G line of Fig. 2;

Fig. 6 is the sectional drawing of doing along the E-E line of Fig. 4;

What Fig. 7 represented is the detail at the F position of Fig. 1;

Fig. 8 is the sectional drawing of doing along the H-H line of Fig. 7;

The schematic representation of Fig. 9 is represented the size of rotor blade of the present invention;

Figure 10 is the performance diagram of explanation efficient of the present invention;

Figure 11 is the performance diagram of explanation efficient of the present invention;

Figure 12 is that the drainage pump of prior art carries out the side view after part is analysed and observe;

Figure 13 is the side view of the rotor blade of Figure 12;

What Figure 14 represented is the detail at the B position of Figure 13;

Figure 15 is the top view of the rotor blade of Figure 13;

Figure 16 is the schematic cross sectional view of Figure 13 and rotor blade shown in Figure 15.

The preferred embodiment of drainage pump of the present invention is described now in conjunction with the accompanying drawings.In embodiment's description, the parts that have identical function with parts among the prior art embodiment are represented with same numeral.In addition, used identical among used motor and the prior art embodiment in the present embodiment.So omit the description to motor, just the structure to rotor blade is described.

Fig. 1 is an embodiment's of drainage pump rotor blade a front view; Fig. 2 is the top view of doing from the direction shown in Fig. 1 arrow P; Fig. 3 is the sectional drawing of doing along the A-A line of Fig. 2; Fig. 4 is the sectional drawing of doing along the D-D line of Fig. 2; Fig. 5 is the sectional drawing of doing along the G-G line of Fig. 2; Fig. 6 is the sectional drawing of doing along the E-E line of Fig. 4; What Fig. 7 represented is the detail at the F position of Fig. 1; Fig. 8 is the sectional drawing of doing along the H-H line of Fig. 7.

Rotor blade 50 is made by moulding material, and it comprises the little spoke blade 410 of a plurality of (for example four) templates.The top of little spoke blade is connected on a plurality of (for example four) big spoke blade 450 by tapering 411.

Center portion at big spoke blade 450 forms a cylindrical shaft spare 420, and axle part 420 comprises a hole 430, has in the middle at the bottom of one.The output shaft of motor (not shown) is compressed into hole 430, so that send the rotating force of motor to rotor blade 50.

The lower edge of big spoke blade 450 covers with a dish-type ring 460.An opening 462 is formed on the middle part of ring 460.

The outer periphery of dish-type ring 460 are connected with a cylindrical wall spare 470.Wall spare 470 links to each other with the outer rim of big spoke blade 450, makes the upper limb 472 of the cylindrical wall spare 470 of formation be lower than the upper limb 451 of big spoke blade 450.

Four auxiliary blades 452 are installed in the cylindrical wall spare 470.Each auxiliary blade 452 is installed between four big spoke blades 450, and these blades are extended towards the direction of the opening 462 of dish-type ring 460.In the embodiment shown in fig. 6, in the radial direction, make auxiliary blade in the face of the edge 454 of the inside radially extend to the opening 462 of dish-type ring 460 near.

With the height of the upper limb 453 of auxiliary blade 452, set for consistent with the height of the upper limb 451 of big spoke blade 450.Make the upper limb 453 of the upper limb 451 of big spoke blade 450 and auxiliary blade 452 exceed the upper limb 472 of cylindrical wall spare 470.Exceeding part helps to make rotor blade to obtain the maximum pressure head of pump.In another embodiment, only make the upper limb of big spoke blade or auxiliary blade exceed wall spare 470.

Shown in Fig. 7 and Fig. 8 is the tapering part 412 that forms in little spoke blade 410 bottoms, and the shape of the curve slope 414 that forms on little spoke blade 410 outer rims.

According to the present invention, the blade that will have above-mentioned shape and structure is installed in rotation on the drainage pump, and these blades can be made the lightweight solid of rotation.Therefore, just can obtain noise and the minimum drainage pump of vibration.

The schematic representation of Fig. 9 is represented an example of the size of rotor blade 50.

Can select the outer warp of rotor blade 50, make it satisfy the required specification of drainage pump.The outer warp of the rotor blade that present embodiment is used is 35mm.

When the height setting of cylindrical wall spare 470 becomes S, when big spoke blades height is set T for, checks the variation of noise and the maximum pressure head of pump.In fact, be to be fixed on 6.0/mm, the height S of cylindrical wall spare 470 is changed to 6.0mm from 3.5mm to finish to the characteristic test of the maximum pressure head of noise and pump by height T with big spoke blade 450, its spacing is 0.5mm.

Figure 10 is the test result that obtains under 50 hertz voltage rating, and Figure 11 is the test result that obtains under 60 hertz voltage rating.In Figure 10 and 11, horizontal axis is represented ratio S/T, and vertical shaft is represented noise (dB) and the non-water height (mm) that send.

In Figure 10, when ratio S/T is 4.0/6.0, when pump head being maintained 700mm (curve representation that couples together with symbol △ among the figure) waste discharge, diminish with the noise characteristic that when pump head being maintained 700mm (curve representation that couples together with symbol among the figure) waste discharge, measures, and remain on bigger value with the non-water altitude response that send shown in the curve of symbol * couple together among the figure.When ratio S/T was 4.5/6.0 and 5.0/6.0, this noise characteristic also remained on low value, but when ratio S/T was 5.0/6.0, the non-water altitude response that send reduced.

Curve and Figure 10 shown in Figure 11 are similar, and what this illustrated is non-water altitude response and the noise characteristic sent.Test result shows, when ratio S/T is 4.0/6.0, the non-water height curve representation of symbol * couple together (among the figure with) that send keeps high value, and when pump head remains on 700mm waste discharge (curve representation that couples together with symbol △ among the figure) and when draining finishes (curve that couples together with symbol among the figure), noise characteristic all reduces.When ratio S/T was 4.5/6.0 and 5.0/6.0, noise characteristic remained on low value, but when ratio S/T was 5.0/6.0, the non-water height that send reduced.

Therefore, by the height S of cylindrical wall spare and the ratio between the big spoke blades height T are set in 4.0/6.0 to 5.0/6.0, in other words, the height of cylindrical wall spare and the ratio between the big spoke blades height are set in 66% to 83%, just can improve the noise characteristic of drainage pump, and can not reduce the non-water height that send.

Above embodiment's introduction be the situation that on rotor blade 50, forms auxiliary blade.But the upper limb that the present invention also goes for above-mentioned big spoke blade or auxiliary blade does not exceed the situation of the upper limb of cylindrical wall spare.

As mentioned above, drainage pump of the present invention defines the ratio between the big spoke blades height of the height of cylindrical wall spare and rotor blade, and this can reduce noise effectively, and can keep the non-water height that send.

In addition according to the present invention, owing in the process of making drainage pump, do not need to change significantly the profile and the critical piece of traditional drainage pump, thereby can reduce the drainage pump of noise effectively with low-cost manufacturing.

Claims

1. drainage pump, this pump comprises a rotor blade that links to each other with motor transmission shaft and a housing of placing this rotor blade, described rotor blade comprises an axle part that links to each other with motor transmission shaft, along the big spoke blade of a plurality of templates that radially is installed on the described axle part, along the little spoke blade of a plurality of templates that axially is installed in described big spoke blade below, dish-type ring that links to each other with the lower edge of described big spoke blade with hollow space, and one be installed in the cylindrical wall spare that being used on the described dish-type ring outer rim connects the outer periphery of described each big spoke blade, wherein, the height of described cylindrical wall spare and the ratio of big spoke blades height are adjusted to 66% to 83%.

2. drainage pump according to claim 1 wherein, also forms an auxiliary blade between described big spoke blade on the dish-type ring in described cylindrical wall spare.

3. drainage pump according to claim 1, wherein, the upper edge portion of described big spoke blade exceeds the upper edge portion of described cylindrical wall spare.

4. drainage pump according to claim 2, wherein, the upper edge portion of described auxiliary blade exceeds the upper edge portion of described cylindrical wall spare.