CN101925747B

CN101925747B - Household appliance for washing articles

Info

Publication number: CN101925747B
Application number: CN2008801257909A
Authority: CN
Inventors: I·蒙蒂科; A·马松; M·德尔普波
Original assignee: Electrolux Home Products Corp NV
Current assignee: Electrolux Home Products Corp NV
Priority date: 2008-02-01
Filing date: 2008-12-19
Publication date: 2012-11-28
Anticipated expiration: 2028-12-19
Also published as: WO2009095065A1; CN101925747A; ATE504744T1; DE602008006007D1; EP2085619B1; PL2085619T3; EP2085619A1

Abstract

A household appliance (1) for washing articles having at least one electric pump (8) for circulating or draining water; the electric pump (8) having an outer volute (9) having an inner pumping chamber (9a), an impeller (10) housed in axially rotating manner inside the pumping chamber (9a), and an electric motor (11) connected mechanically to the impeller (10) to rotate it about a rotation axis (A); the impeller (10) in turn having a central hub (17) coaxial with the rotation axis (A), and at least one movable projecting blade (18) fitted to the central hub (17) and movable between a fully retracted position in which the blade (18) is almost totally withdrawn inside the central hub (17), and a fully extracted position in which the blade (18) projects from the central hub (17) so that the outer lateral edge (18a) of the blade is further from the rotation axis (A) than when the blade (18) is in the fully retracted position.

Description

The household electric appliance of washing articles

Technical field

The present invention relates to a kind of household electric appliance of washing articles.

More particularly, the present invention relates to a kind of washing machine or dishwasher with electronic draining pump, the description that below relates to this washing machine or dishwasher is carried out through example fully.

Background technique

As what known, washing machine and dishwasher are equipped with the electric water pump that is used for draining usually.This pump has the impeller that is connected to the motor reel end, and it rotates around the inner centre rotational axis of the pump chamber with intake pipe and delivery pipe.In known water pump; This impeller through articulated joint or clutch mechanism be connected to motor reel; Between said axle and impeller, allow to have certain amount of rotating relatively freely (for example 120 °); So that when motor start-up, it is that idle running is to reduce detent torque and current peak widely basically that motor reel begins.In fact, the high liquid inertia of the motionless water in the said pump chamber begins on said impeller, thereby also is on motor reel, to have produced high drag torque.

But the two all has a plurality of shortcomings articulated joint and clutch.Clutch be expensive and noise big, and articulated joint contains a certain amount of grease, this can lose its characteristic on the joint operating life, thereby causes noise or or even the blocking of joint.

The articulated joint or the clutch of cancellation electric water pump have been proposed at present.But, in this case, need quite powerful motor to overcome the high liquid inertia of the motionless water in the pump chamber, thereby increased cost and size widely.

Summary of the invention

The purpose of this invention is to provide a kind of electronic draining pump that is used for washing machine or dishwasher, it has been designed to eliminate above-mentioned shortcoming and has not made the size of pump motor too big.

According to the present invention, a kind of household electric appliance that are used for washing articles are provided, it has at least one motor-drive pump that is used to circulate or discharges wash liquid; Said motor-drive pump comprises: but have internal pump chamber shell, with the mode of axial rotation be contained in the impeller in the pump chamber and mechanically be connected to said impeller so that said impeller around the motor of pivot axis; Its improvement is; The center hub that said impeller comprises and said rotation axis is coaxial and at least one bulged blade movably that is installed to said center hub and can between complete retracted position and complete extended position, moves; Wherein, At said complete retracted position, said bulged blade almost completely is reduced to the inside of said center hub, and at said complete extended position; Said bulged blade stretches out from said center hub, thereby the said rotation axis of outer side distance of comparing said bulged blade when being in complete retracted position with said bulged blade is farther.

Description of drawings

To describe a non-limiting mode of execution of the present invention with reference to accompanying drawing, wherein:

-Fig. 1 shows the side view according to the washing machine of instruction of the present invention, and the some of them parts illustrate with the cross section, and has for the sake of clarity removed some parts;

-Fig. 2 shows the decomposition side view of the motor-drive pump of Fig. 1 washing machine, and the some of them parts illustrate with the cross section, and has for the sake of clarity removed some parts;

The motor-drive pump that-Fig. 3 and 4 shows Fig. 2 respectively stop with operating condition under the sectional view of front portion.

Embodiment

Referring to Fig. 1, the whole household electric appliance that are used to wash of numeral 1 expression, this electric household appliance are useful on the wash liquid that makes in this equipment hydraulic circuitry mobile and/or that when wash cycle finishes, said wash liquid is discharged from this equipment.

Specifically, in shown example, household electric appliance 1 are domestic washing machines 1, and it comprises the housing 2 that rests on the floor; The washing tube 3 of cylindrical (preferred but inessential), it is suspended on housing 1 inside through a plurality of helical springs 4 (only showing among Fig. 1) with ralocatable mode, and said helical spring 4 is preferably but unnecessarily be combined with one or more vibration damper (not shown); Be contained in the turning barrel 6 to rotate in the said washing tube 3 around its longitudinal axis; And supply water or from the hydraulic circuitry 7 of washing tube 3 drainings to washing tube 3 according to order.

Referring to Fig. 1 and 2; Hydraulic circuitry has the motor-drive pump 8 that is used to make water cycle or draining; This motor-drive pump 8 comprises: shell 9; This shell 9 has internal pump chamber 9a, and two openings and the outside UNICOM of the inlet 8a of this internal pump chamber 9a through defining pump respectively and outlet 8b are promptly with the water pipe UNICOM of hydraulic circuitry 7; Impeller 10, it is inner that it is contained in pump chamber 9a with axial rotary way, and rotating around rotating centroidal axis A, this centroidal axis A is preferably but unnecessarily consistent with the longitudinal axis of shell 9; And slewing motor 11 (for example permanent magnet synchronous motor or permanent magnetism asynchronous motor, synchronous motor or asynchronous motor); This motor 11 mechanically is connected to shell 9, so that its rotatingshaft 11a and centroidal axis A stretch into pump chamber 9a coaxially and directly also be connected to impeller 10 rigidly so that it rotates around its centroidal axis A.

Referring to Fig. 2; In shown mode of execution, shell 9 is to be made up of disk-shaped basically parts 12 and cup-shaped basically parts 13, wherein; Said disc-shaped part 12 is shaped to one with the shell of motor 11, thereby stretch out from the center of disc-shaped part 12 end of rotatingshaft 11a; Said cup 13 is installed on the disc-shaped part 12 in a fluid tight manner removedly, to limit the pump chamber 9a of impeller 10 in inside.

More particularly, disc-shaped part 12 is coaxial, promptly coaxial with centroidal axis A with the longitudinal axis of said frame or shell 9, and rotatingshaft 11a is inserted in the disc-shaped part 12 with rotatable mode with fluid-tight.

Cup 13 is screwed to disc-shaped part 12, and has and the longitudinal axis of shell 9 (promptly coaxial with centroidal axis A) axial inlet pipe 14 of extending coaxially; And with respect to the radial discharge pipe 15 of cup 13 horizontal expansions (promptly the longitudinal axis with shell 9 is vertical).Between cup 13 and disc-shaped part 12 preferably but flexible annular packing ring 16 unnecessarily is installed in case leak-stopping water.

Referring to Fig. 2; 3 and 4; The impeller 10 of motor-drive pump 8 is contained in the cup 13, promptly is contained in the pump chamber 9a, can rotate around centroidal axis A; And comprise: preferably but unnecessarily be the center hub 17 of Gothic arch, center hub 17 and the coaxial extension of centroidal axis A and be installed to the end of rotatingshaft 11a rigidly; And one or more (being four in the example that illustrates) be installed to the bulged blade 18 of center hub 17, and they preferably but unnecessarily around center hub 17 equal angles ground at interval.

Different with other washing machine; Each blade 18 of motor-drive pump 8 is being installed to center hub 17 in the mode of moving between retracted position and the complete extended position fully; At said complete retracted position; Blade 18 almost completely is withdrawn into the inside (see figure 3) of center hub 17, and at said complete extended position, blade 18 stretches out from center hub 17; And the amount of stretching out almost is perpendicular to its whole length (see figure 4) that rotation axis A measures, thereby the outer side 18a that compares blade when being on the complete retracted position with blade 18 is farther apart from rotation axis A.

In addition, referring to Fig. 2, impeller 10 also comprises and is used for controlling the movably position control of the position of bulged blade 18 on center hub 17 according to the instant angular velocity of impeller 10.

Specifically, impeller 10 comprise be used to offset centrifugal force and the angular velocity of center hub 17 drop to setting value make when following each movably bulged blade 18 get into device of complete retracted position.

Especially; Referring to Fig. 2; In shown example; Each movably bulged blade 18 be by being that trapezoidal tabular fin 18 constitutes basically, tabular fin 18 is positioned on the radial plane that overlaps with the rotation axis A of center hub 17, and slidably is inserted among the corresponding radial groove 17a that is molded on center hub 17 bodies; Being used to control movably, the position control of the position of bulged blade 18 comprises a plurality of helical springs 19; Each helical spring is contained among the corresponding radial groove 17a on the center hub 17; And second end that each helical spring has first end of the bottom that is installed to radial groove 17a and is installed to the fin body, so that whole fin 18 is moved on the bottom of corresponding radial groove 17a.

In other words, each helical spring 19 be designed to offset centrifugal force and when the angular velocity of center hub 17 just flexibly will be accordingly when setting value is following movably bulged blade 18 remain on the complete retracted position.

Generally speaking from top description, can clearly infer the operation that washing machine 1, no longer need further explain.

About motor-drive pump 8; Referring to Fig. 3; As long as impeller 10 is motionless perhaps with low-down angular velocity rotation; Helical spring 19 will offset said centrifugal force and will be movably bulged blade 18 remain on the inner complete retracted position of center hub 17, in case produce high drag torque when rotating in the actionless water of uppermost leaf wheel 10 in pump chamber 9a.

On the contrary; Referring to Fig. 4; When the angular velocity of impeller 10 reaches setting value (it is decided according to the mechanical property of helical spring 19); Said centrifugal force has overcome the elastic force of helical spring 19 and has made blade 18 come out to get into the position of stretching out fully from center hub 17, so impeller 10 can make water pass through shell 9 to flow.

As stated, the use of motor-drive pump 8 has a plurality of advantages.Because the design of impeller 10, motor-drive pump 8 do not need articulated joint or clutch to reduce the required detent torque of motor 11 between a 11a of impeller 10 and motor 11.

In addition, because as long as impeller 10 is motionless, movably bulged blade 18 just remains on the complete retracted position, so when turning off motor-drive pump 8, owing to any fine hair or chip in the water no longer are bonded on the impeller 10, so motor-drive pump 8 can not stopped up.

Obviously, can be without departing from the present invention to as described washing machine 1 and/or motor-drive pump 8 make a change here.

For example, the impeller 10 of motor-drive pump 8 can comprise one or more movably bulged blades 18, and one or more fixing bulged blade 18 that can not move radially that is connected to center hub 17 rigidly.

Obviously, in different embodiment, household electric appliance 1 can be dishwashers.Under this kind situation, motor-drive pump 8 is used for circulation or discharges dish water.

Claims

1. household electric appliance (1) that are used for washing articles, it has at least one motor-drive pump (8) that is used to circulate or discharges wash liquid; Said motor-drive pump (8) comprising: have internal pump chamber (9a) shell (9) but, be contained in the impeller (10) in the pump chamber (9a) and mechanically be connected to said impeller (10) with the mode of axial rotation so that the motor (11) that said impeller (10) rotates around rotation axis (A);

It is characterized in that: the center hub (17) that said impeller (10) comprises and said rotation axis (A) is coaxial and at least one bulged blade (18) movably that is installed to said center hub (17) and can between complete retracted position and complete extended position, moves; Wherein, At said complete retracted position; Said bulged blade (18) almost completely is reduced to the inside of said center hub (17), and at said complete extended position, said bulged blade (18) stretches out from said center hub (17); Thereby compare when being in complete retracted position with said bulged blade (18), the outer side of said bulged blade (18a) the said rotation axis of distance (A) is farther.

2. household electric appliance that are used for washing articles described in claim 1; It is characterized in that said impeller (10) comprises the device that is used for controlling according to the instant angular velocity of said center hub (17) position of said movably bulged blade on said center hub (17).

3. household electric appliance that are used for washing articles described in claim 2; It is characterized in that, be used to control said movably bulged blade the said device (19) of the position on the said center hub (17) the angular velocity of said impeller (10) drop to setting value make when following said at least one movably bulged blade (18) move to complete retracted position.

4. like each described household electric appliance that are used for washing articles in the aforementioned claim; It is characterized in that; Said at least one movably bulged blade (18) be to constitute by tabular basically fin (18); Said fin (18) is positioned on the radial plane that overlaps with the rotation axis (A) of said impeller (10), and is inserted into slide type in the corresponding radial groove (17a) on the body that is formed on said center hub (17).

5. the household electric appliance that are used for washing articles as claimed in claim 3; It is characterized in that; Said at least one movably bulged blade (18) be to constitute by tabular basically fin (18); Said fin (18) is positioned on the radial plane that overlaps with the rotation axis (A) of said impeller (10); And be inserted into slide type in the corresponding radial groove (17a) on the body that is formed on said center hub (17); And the said device (19) that is used to control the position of said movably bulged blade on said center hub (17) comprises at least one resilient member (19); Said resilient member is contained in the said radial groove (17a) of said center hub (17), and first end of said resilient member with the bottom that is installed to said radial groove (17a) be installed to second end of the body of said tabular fin (18) so that said tabular fin (18) is moved on the bottom of said radial groove (17a); Said resilient member (19) is designed to offset centrifugal force and when setting value is following, said movably bulged blade (18) is remained on complete retracted position at the angular velocity of said impeller (10).

6. the household electric appliance that are used for washing articles as claimed in claim 1 is characterized in that, said impeller (10) comprises around said center hub (17) equal angles a plurality of movably bulged blades (18) at interval.

7. the household electric appliance that are used for washing articles as claimed in claim 1 is characterized in that, these household electric appliance are washing machine or dishwasher.

8. the household electric appliance that are used for washing articles as claimed in claim 7 is characterized in that, said motor-drive pump (8) is draining pump (8).