CN1282865C - Water level sensor for washing machine - Google Patents
Water level sensor for washing machine Download PDFInfo
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- CN1282865C CN1282865C CN 02123855 CN02123855A CN1282865C CN 1282865 C CN1282865 C CN 1282865C CN 02123855 CN02123855 CN 02123855 CN 02123855 A CN02123855 A CN 02123855A CN 1282865 C CN1282865 C CN 1282865C
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- water level
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Abstract
The present invention relates to a washing machine water-level device with the following structure that fluid enters or goes out of an air space with the variation of the water level; a hose supplies fluid to the air space; a fluid inflow inlet is formed on a lower part box body, the pressure of the fluid passing through the hose can be transferred by the fluid inflow inlet; an upper part box body is detachably combined on the upper side of the lower part box body, and the central part of the upper part box body is provided with a hollow circular reel; a partition plate can move up and down with the variation of the pressure of the fluid, and the partition plate is arranged on the lower part box body; an iron core can moves down with the movement of the partition plate; a coil is wound on the peripherical surface of the reel. The present invention can bring the effect that a water level perception device determines the water level of washing water, and the output frequency characteristic of the water level perception device is determined by the coefficient of induction of the coil of the reel. The water level perception device can obtain desired frequency characteristic only by being combined with a capacitor with certain capacity by stabilizing the coefficient of induction, so that the combined operation of multiple capacitors is avoided, working procedures of operation are simplified, production efficiency is enhanced; in addition, the structure of a water level perception sensor becomes simple.
Description
Technical field
The present invention relates to a kind of washing machine, relate in particular to a kind of water level, make the feedwater of each washing stroke and the level sensor of the perception washing machine that drainage works carries out smoothly by supply in the perception sink.
Background technology
General devices such as automatic washing machine all are provided with water level sensing device.Above-mentioned water level sensing device is exported to control device with autosense water level, makes control device to feed water and draining control.Above-mentioned water level sensing device can feed water in sink according to the open feed-water valve of the amount of the washing object in the sink; Along with the water level rising of above-mentioned feedwater, atmospheric pressure also can rise, and interrupts feedwater so above-mentioned water level sensing device cuts off feed-water valve, can finish automatically and regulate the interior water level of sink, so prevented the waste of washings.And by suitably regulating the supply of washings, improved the efficient of washing, realized the full automatic washing process simultaneously.
Fig. 1 schematically demonstrates the structure of the water level sensing device of general washing machine.Below with reference to Fig. 1, the structure and the effect of the washing machine water level sensing device of prior art is elaborated.
As shown in Figure 1, water level sensing device mainly comprises lower part box 1, upper box body 2, dividing plate (diaphragm) 20, drives mouth 30, iron core 40, spring 80, bobbin 50 and coil 60.Above-mentioned lower part box 1 is provided with fluid inflow entrance 1a, and washings or air etc. can flow into above-mentioned fluid inflow entrance 1a; Above-mentioned upper box body 2 is arranged on the above-mentioned lower part box 1; Aforementioned barriers 20 is positioned at the upside of above-mentioned lower part box; Above-mentioned driving mouth 30 is attached to above the aforementioned barriers 20; Above-mentioned iron core 40 is arranged on the upside of above-mentioned driving mouth 30; Above-mentioned collapse coil spring 80 is along the opposite direction of the pressure direction of above-mentioned fluid, the above-mentioned iron core 40 of resiliency supported; Above-mentioned bobbin 50 is arranged on the inboard of above-mentioned upper box body; Above-mentioned coil 60 is arranged on the outer peripheral face of above-mentioned bobbin 50.
The above-mentioned interior water level of water washing groove of giving has of the startup of the above-mentioned water level sensing device of said structure, feeds water, so will rise to the inboard of sink by washing machine.By being arranged on the air space (not expressing in the accompanying drawing) of sink bottom, the water level of the washings in the flexible pipe (not expressing in the accompanying drawing) also will rise then.So the internal pressure of above-mentioned air space also and then rises.
Then, the above-mentioned internal pressure of rising is delivered on the aforementioned barriers 20 by fluid inflow entrance 1a, overcomes the elastic force of above-mentioned collapse coil spring 80, promotes aforementioned barriers 20 upward.
At this moment, above-mentioned collapse coil spring 80 is along with pressure that SEA LEVEL VARIATION produced and be subjected to displacement; Driving mouth 30 above being arranged on aforementioned barriers 20 and above-mentioned iron core 40 also will rise along with the displacement of above-mentioned collapse coil spring 80; Along with the displacement of above-mentioned driving mouth 30, under the interaction between above-mentioned bobbin 50 and the coil 60, magnetic flux density will change.The variation of above-mentioned magnetic flux density causes that induction coefficient L changes on freq converting circuit, forms resonance with capacitor C.The mathematical expression of output frequency f is as follows:
The characteristic of above-mentioned output frequency f is subjected to the influence of above-mentioned induction coefficient L bigger, and above-mentioned induction coefficient L is by the permutation state or the decision of non-permutation state of the coiling state that is wound on the coil 60 on above-mentioned bobbin 50 outer peripheral faces, coiling.
Fig. 2 a demonstrates the neat state that is wound on coil on the bobbin among Fig. 1.Fig. 2 b demonstrates the non-neat state that is wound on coil on the bobbin among Fig. 1.That is to say that shown in Fig. 2 a, the coil 60 on the outer peripheral face of above-mentioned bobbin 70 carries out coiling according to the permutation state,, after assembling with the certain electric capacity of capacity, can obtain desirable frequency characteristic so the value of induction coefficient L is certain.
But; in the winding structure of coil 60 of the prior art; when the coil 60 of coiling on above-mentioned bobbin 50 is twined (winding) operation; the permutation that occurs above-mentioned coil 60 through regular meeting is bad; when the bad generation of permutation state of coil (with reference to Fig. 2 b); can cause the variation along with induction coefficient L value, output frequency characteristic also changes.If think to obtain the correspondent frequency characteristic, need make up by a plurality of electric capacity that capacity is different, finally caused the low problem of production efficiency.
Summary of the invention
The present invention proposes in order to address the above problem, the purpose of this invention is to provide the washing machine water level sensing device that can bring following effect: the water level of water level sensing device decision washings, and the output frequency characteristic of water level sensing device is decided by the induction coefficient L of bobbin coil.In the present invention, by stablizing above-mentioned induction coefficient L, only need just to make up and to obtain desirable frequency characteristic, so avoided carrying out the combination operation of a plurality of electric capacity in order to obtain desirable frequency characteristic with the certain electric capacity of capacity, simplify flow chart, improved production efficiency; Make the structure of water level detecting sensor also become simple in addition.
In order to reach the purpose of the invention described above, the invention provides a kind of water level sensing device of washing machine, mainly comprise: air space, flexible pipe, lower part box, upper box body, dividing plate, iron core and coil; Above-mentioned air space can make the increase and decrease discrepancy air space of fluids such as washings and air along with water level; Above-mentioned flexible pipe is to above-mentioned air space accommodating fluid; Be formed with the fluid inflow entrance on the above-mentioned lower part box, can transmit fluid pressure by above-mentioned flexible pipe by above-mentioned fluid inflow entrance; Above-mentioned upper box body removably be combined in above-mentioned lower part box above, the central portion of above-mentioned upper box body is provided with the bobbin of hollow circular; Aforementioned barriers is arranged on the upside of above-mentioned lower part box along with the increase and decrease of fluid pressure can move up and down; Above-mentioned iron core can be along with moving up and down of aforementioned barriers bobbin inboard in the above-mentioned upper box body move up and down; Above-mentioned coil winding is on the outer peripheral face of above-mentioned bobbin.
Can bring following effect by washing machine water level sensing device provided by the present invention.
At first, the water level of water level sensing device decision washings, and the output frequency characteristic of water level sensing device is decided by the induction coefficient L of bobbin coil.In the present invention, by stablizing above-mentioned induction coefficient L, only need just to make up and to obtain desirable frequency characteristic, so avoided carrying out the combination operation of a plurality of electric capacity in order to obtain desirable frequency characteristic with the certain electric capacity of capacity, simplify flow chart, improved production efficiency; Make the structure of water level detecting sensor also become simple in addition.
The second, because above-mentioned bobbin is formed on the above-mentioned upper box body, has simplified flow chart, and reduced part count, thereby improved production efficiency.
The 3rd, owing to fill application member, improved the fastness and the insulating property of coil with insulating property in the outside of above-mentioned coil.
Description of drawings
Fig. 1 schematically demonstrates the structure of the water level sensing device of general washing machine;
Fig. 2 a demonstrates the neat state of the coil that is wound among Fig. 1 on the bobbin;
Fig. 2 b demonstrates the non-neat state of the coil that is wound among Fig. 1 on the bobbin;
Fig. 3 schematically demonstrates the sectional view of the water level perceptual structure of the embodiment of the invention;
Fig. 4 is Fig. 3 " A " part enlarged drawing, demonstrates the sectional view of loop construction and coiling state.
The critical piece description of reference numerals
1: lower part box 1a: the fluid inflow entrance
100: upper box body 150: bobbin
160: coil 160a: copper cash
160b: coat 160c: bonding coat
Embodiment
With reference to the accompanying drawings, embodiments of the invention are elaborated.
Below in the declarative procedure that carries out, for the critical piece of washing machine water level detecting sensor of the present invention, part same as the prior art, Reference numeral is also identical, can be omitted explanation at this with reference to Fig. 1, Fig. 2 a and Fig. 2 b of prior art.
Fig. 3 schematically demonstrates the sectional view of the water level perceptual structure of the embodiment of the invention.Fig. 4 is Fig. 3 " A " part enlarged drawing, demonstrates the sectional view of loop construction and coiling state.Below with reference to above-mentioned accompanying drawing, the embodiment of washing machine water level sensing device of the present invention is elaborated.
As shown in Figure 3 and Figure 4, in above-mentioned water level sensing device, lower part box 1 and upper box body 100 constitute the outward appearance of water level sensing device.Above-mentioned lower part box 1 is provided with fluid inflow entrance 1a, and washing water and air etc. can flow in the above-mentioned fluid inflow entrance 1a, and above-mentioned washing water and air etc. can be come in and gone out by air space and flexible pipe from sink (not expressing the accompanying drawing) side; Above-mentioned upper box body 100 be removably disposed in above-mentioned lower part box 1 above.
The inside bottom surface of above-mentioned lower part box 1 is provided with dividing plate 20, and dividing plate can rise along with the increase and decrease of fluid pressure or descend; Be provided with above the aforementioned barriers 20 and drive mouth 30 and iron core 40; Above-mentioned driving mouth 30 and iron core 40 can move up and down along with moving up and down of aforementioned barriers 20.
In addition, above-mentioned lower part box central portion inboard is formed with bobbin 150, can move up and down along with the pressure change of fluid in order to make above-mentioned iron core, and above-mentioned bobbin 150 is designed to along the cylindrical shape of the hollow of the moving direction of above-mentioned iron core 40.The inboard of above-mentioned bobbin 150 is provided with collapse coil spring 80, and above-mentioned collapse coil spring is wound with coil 160 according to the above-mentioned iron core 40 of the opposite direction resiliency supported of fluid pressure direction on the outer peripheral face of above-mentioned bobbin 150.
At this moment, for the increase that prevents flow chart and the increase of number of components, above-mentioned bobbin 150 preferably forms one with above-mentioned upper box bodies 100.By above-mentioned bobbin 150 is formed on the above-mentioned upper box body 100, can before above-mentioned upper box body 100 of assembling and lower part box 1, above-mentioned coil 160 insertions be arranged on the outer peripheral face of above-mentioned bobbin 150.
And the above-mentioned coil 160 that is wound on the above-mentioned bobbin 150 preferably adopts autoadhesion lead (selfbonded wire).Above-mentioned autoadhesion lead is made of copper cash 160a, coating 160b and bonding coat 160c.Above-mentioned copper cash 160a has electric conductivity; Above-mentioned coating 160b is made of the material of enamel resin good insulation preformances such as (enamel), is enclosed in the outside of above-mentioned copper cash (160a); Above-mentioned bonding coat 160c has certain cohesive, covers the outside of above-mentioned coating 160b.
So, by water level sensing device of the present invention, stablized the induction coefficient L that changes along with the displacement of above-mentioned iron core 40, in order to obtain desirable frequency characteristic, need not a plurality of electric capacity different and make up, only need to get final product with the certain electric capacity combination of capacity with capacity.
In addition, polyurethane application members 170 such as (urethane) is filled in coil 160 outsides of coiling on the outer peripheral face of above-mentioned bobbin 150, has improved the stability of above-mentioned coil 160; Again owing to above-mentioned application member 170 is made of the insulation material, so improved the insulating property of above-mentioned coil 160 more.
Up to the present, though be that the center has been described in detail with embodiments of the invention, the personnel that have general knowledge in technical field of the present invention can propose a lot of distortion in basic fundamental thought range of the present invention.Basic fundamental thought of the present invention is embodied in the desired protection domain of claim, and all differences point in the equal with it scope all should be interpreted as belonging to scope of the present invention.
Claims (4)
1, a kind of water level sensing device that is used for washing machine is characterized in that, comprising:
Air space, flexible pipe, lower part box, upper box body, dividing plate, iron core and coil;
Above-mentioned air space can make washings and air along with the increase and decrease of the water level air space of coming in and going out;
Above-mentioned flexible pipe is to above-mentioned air space accommodating fluid;
Be formed with the fluid inflow entrance on the above-mentioned lower part box, can transmit fluid pressure by above-mentioned flexible pipe by above-mentioned fluid inflow entrance;
Above-mentioned upper box body removably be combined in above-mentioned lower part box above, the central portion of above-mentioned upper box body is provided with the bobbin of hollow circular;
Aforementioned barriers is arranged on the upside of above-mentioned lower part box along with the increase and decrease of fluid pressure can move up and down;
Above-mentioned iron core can be along with moving up and down of aforementioned barriers bobbin inboard in the above-mentioned upper box body move up and down;
Above-mentioned coil winding is on the outer peripheral face of above-mentioned bobbin;
Be wound on the outside surface of coil of above-mentioned bobbin outer peripheral face, be filled with the application member that improves fastness.
2, the water level sensing device that is used for washing machine according to claim 1 is characterized in that: above-mentioned application member is made of the insulation material.
3, the water level sensing device that is used for washing machine according to claim 1, it is characterized in that: above-mentioned coil is made of the autoadhesion lead, above-mentioned autoadhesion lead is coated with the bonding coat with bounding force on the outer peripheral face of lead, the oneself keeps the coil state of permutation.
4, the water level sensing device that is used for washing machine according to claim 1 is characterized in that: above-mentioned bobbin and above-mentioned upper box body form one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02123855 CN1282865C (en) | 2002-07-05 | 2002-07-05 | Water level sensor for washing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02123855 CN1282865C (en) | 2002-07-05 | 2002-07-05 | Water level sensor for washing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1465960A CN1465960A (en) | 2004-01-07 |
| CN1282865C true CN1282865C (en) | 2006-11-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02123855 Expired - Fee Related CN1282865C (en) | 2002-07-05 | 2002-07-05 | Water level sensor for washing machine |
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| Country | Link |
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| CN (1) | CN1282865C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITTO20050644A1 (en) | 2005-09-20 | 2007-03-21 | Itw Metalflex Druzba Za Proizv | SYSTEM FOR DETECTION OF OPERATING PARAMETERS OF A APPLIANCE EQUIPPED WITH A RELATIVELY MOBILE COMPONENT |
| ITTO20050643A1 (en) | 2005-09-20 | 2007-03-21 | Itw Metalflex Druzba Za Proisv | ANALOGUE TRANSLATOR OF POSITION OR OF A CORRELATED PHYSICAL SIZE EQUAL TO THE MECHANICAL CALIBRATION |
| JP5284767B2 (en) * | 2008-12-03 | 2013-09-11 | 東海旅客鉄道株式会社 | Vehicle bogie oil level inspection system |
| CN101832805B (en) * | 2009-03-10 | 2012-01-25 | 杭州神林电子有限公司 | Water level sensor for home appliance |
| KR101065258B1 (en) * | 2009-09-01 | 2011-09-19 | 우성전기공업 주식회사 | Apparatus for guarding of pressure sensor mounting in washing machine |
| CN101806606A (en) * | 2010-03-30 | 2010-08-18 | 南通市华冠电器有限公司 | Water-level sensor for full-automatic washing machine |
| JP5911288B2 (en) * | 2011-12-15 | 2016-04-27 | 中川電化産業株式会社 | Water level detector |
| CN104975471B (en) * | 2014-04-09 | 2019-04-05 | 青岛海尔滚筒洗衣机有限公司 | A kind of detergent throwing device, washing machine and detergent excess detection method |
| CN104878570B (en) * | 2015-05-29 | 2017-07-25 | 南京创维家用电器有限公司 | It is a kind of that there is the washing machine and detection method for detecting laundry agent surplus function |
-
2002
- 2002-07-05 CN CN 02123855 patent/CN1282865C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1465960A (en) | 2004-01-07 |
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| SE01 | Entry into force of request for substantive examination | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061101 Termination date: 20110705 |