CN104638903A - Washing machine and interference suppression module thereof - Google Patents
Washing machine and interference suppression module thereof Download PDFInfo
- Publication number
- CN104638903A CN104638903A CN201310552738.4A CN201310552738A CN104638903A CN 104638903 A CN104638903 A CN 104638903A CN 201310552738 A CN201310552738 A CN 201310552738A CN 104638903 A CN104638903 A CN 104638903A
- Authority
- CN
- China
- Prior art keywords
- protection circuit
- washing machine
- leakage current
- current protection
- codan
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005406 washing Methods 0.000 title claims abstract description 45
- 230000001629 suppression Effects 0.000 title abstract description 9
- 239000003990 capacitor Substances 0.000 abstract 1
- 230000005611 electricity Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 208000019622 heart disease Diseases 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/01—Arrangements for reducing harmonics or ripples
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Washing Machine And Dryer (AREA)
Abstract
The invention relates to a washing machine and an interference suppression module thereof. The interference suppression module comprises an input protection circuit, an interference suppression circuit and a leakage current protection circuit connected in parallel to a mains grid. An outgoing ground wire of the leakage current protection circuit is connected with a ground wire of the mains grid through a connecting wire. The output of the leakage current protection circuit is in circuit connection with a control system of the washing machine. The interference suppression circuit comprises at least two stages of common mode inductor coils L connected in series and at least one capacitor Cx. The interference suppression module has the advantages that stability of interference suppression is enhanced through the common mode inductor coils L, surge resistance and thunder resistance are improved, no electric shock occurs during running even when no ground wire connection is provided at home, safety of the washing machine is greatly improved, and the ability of the washing machine to adapt to different electricity consumption environments is enhanced.
Description
Technical field
The invention belongs to washing machine technology field, specifically, relate to a kind of for filtering washing machine to the suppression module of utility grid electromagnetic interference and the washing machine adopting described suppression module.
Background technology
Inner in washing machine electrical system, a large amount of electromagnetic interference (EMI) signals can be produced around switching power circuit, fly-wheel diode, high frequency transformer, direct current machine frequency changer circuit etc., these electromagnetic interference (EMI) signals can become more serious greatly along with the change of conversion frequencies, electromagnetic interference (EMI) signal generally has two modes outwards to carry out propagating and disturbing utility grid, is namely by conduction pattern and radiation mode.
At present, codan is widely adopted on washing machine, at the input of its power supply, anti-EMI filter codan is set, general codan only has attenuation to high frequency, low-energy electromagnetic interference (EMI) signal, or is consumed in codan by electromagnetic interference (EMI) signal.But weak point is also obvious, show as:
1, interference suppressioning effect is unstable.Conventional codan is generally made up of discrete components such as common mode inductance, differential mode inductance and electric capacity, and the distributed inductance that causes of the longer lead-in wire of discrete component and the irregular distribution of washing machine electric circuit and distributed capacitance have a great impact its noiseproof feature, therefore, conventional codan has very strong dependence for washing machine circuit design, production operation technique, is unfavorable for modernization, large-scale production line balance.
2, anti-lightning, surge shock resistance are weak.Electromagnetic interference (EMI) signal in utility grid and a large amount of surge pulse, lightning impulse pulse also produce washing machine electrical system and have a strong impact on, its operation irregularity is even occurred potential safety hazards such as electric component is quick-fried.And the codan of routine generally can only bear the test voltage of surge 1000V, the number of times simultaneously resisting surge is limited, the AF panel effect of therefore conventional codan can reduce greatly, make the electromagnetic interference (EMI) train of signal on washing machine enter in utility grid, affect the use of other electric devices.
3, fail safe is poor.Current washing machine has become one of requisite household electrical appliance in daily life, and the security requirement of user to it is also more and more higher, and according to Standard, as long as the leakage current of washing machine is less than 10mA, then it is qualified to think.But consider the particularity of unique user power utilization environment, particularly numerous rural subscribers, a lot of user's family does not all have ground wire, or imperfect earth, and the leakage current that the codan of routine produces is owing to deriving without ground wire, user can be allowed in use to occur comparatively strong electric shock feeling, and this is especially large for there being the user of heart disease to endanger.
Summary of the invention
The object of the present invention is to provide a kind of codan of washing machine, interference suppressioning effect obviously, antisurge impact capacity is strong, leakage current values is little, fail safe is high.
For solving the problems of the technologies described above, the present invention is achieved by the following technical solutions:
A kind of AF panel module of washing machine, comprise input protection circuit, codan and leakage current protection circuit, input protection circuit, codan and leakage current protection circuit are all connected to utility grid, leakage current protection circuit is exported ground wire and is connected with utility grid ground wire by connecting line, and leakage current protection circuit exports and is connected with control system for washing machine circuit; Codan comprises the common mode inductance coil L of at least two-stage serial connection, and comprises at least one electric capacity Cx.
Preferably, input protection circuit comprises at least one piezo-resistance Rv.
Preferably, leakage current protection circuit comprises at least one electric capacity Cy.
Further, the capacitance≤8.8nF of leakage current protection circuit Cy, ensures that the leakage current values that leakage current protection circuit self produces is less than 0.8mA, ensure that washing machine electrical safety.
Wherein, the capacitance≤5 μ F of the inductance value≤60mH of common mode inductance coil L, electric capacity Cx.
AF panel module as above, also comprises discharge protection circuit, and discharge protection circuit comprises the power resistor R of one or more in parallel and/or series connection between zero line and live wire, is conducive to the repid discharge of electric capacity in AF panel module after power-off.
Based on the design of above-mentioned AF panel module, the invention allows for a kind of washing machine, the control system circuit AF panel module of washing machine connects with utility grid, AF panel module comprises input protection circuit, codan and leakage current protection circuit, input protection circuit, codan and leakage current protection circuit are all connected to utility grid, leakage current protection circuit is exported ground wire and is connected with utility grid ground wire by connecting line, and leakage current protection circuit exports and is connected with control system for washing machine circuit; Codan comprises the common mode inductance coil L of at least two-stage serial connection, and comprises at least one electric capacity Cx.
Compared with prior art, advantage of the present invention and good effect are: AF panel module of the present invention, while meeting basic AF panel requirement, strengthen the stability of its interference suppressioning effect by organizing common mode inductance coil L more, large fluctuation is there is not because of the consistency of production technology, operating procedure, improve washing machine production efficiency, reduce management cost; By increasing the piezo-resistance Rv between zero live wire L and N, improving its antisurge, anti-lightning ability, making it to meet the requirement of surge 4000V voltage tester, also because anti-lightning, surge impact are repeatedly, interference rejection capability is declined to a great extent more simultaneously; Most important is capacitance by control capacitance Cy, indirect control its to the leakage current values of ground wire, it is made to be not more than 0.8mA according to GB GB 4706.1-2005 " the safe part 1 of family expenses and similar applications electrical equipment: General Requirement " test for leaks current value, even if reach washing machine user family to connect without ground wire, also the situation of electric shock is there will not be in washing machine running, significantly improve washing machine fail safe, strengthen the adaptive capacity of the different power utilization environment of washing machine simultaneously.
After reading the detailed description of embodiment of the present invention by reference to the accompanying drawings, the other features and advantages of the invention will become clearly.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the specific embodiment of the invention.
Wherein: L-power firestreak inputs, N-zero-power line inputs, and U-power firestreak exports, and V-zero-power line exports, G-ground wire, L1, L2-common mode inductance coil, R1, R2, R3, R4-power resistor, Rv-piezo-resistance, Cx1, Cx2, Cx3-electric capacity, Cy1, Cy2-electric capacity.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
As shown in Figure 1, the codan of washing machine comprises input protection circuit, codan, leakage current protection circuit and discharge protection circuit.
Input protection circuit is by the external utility grid of power-line of washing machine, and the input protection circuit of the present embodiment is pressure-sensitive protective circuit, for being connected to a piezo-resistance Rv between live wire L and zero line N.Certainly, piezo-resistance also can be the multiple piezo-resistances being connected to multiple parallel connection between live wire L and zero line N and/or series connection, all within protection scope of the present invention.
Input protection circuit connects with the front end of codan; the codan of the present embodiment comprises two-stage and common mode inductance coil L1, L2 of connecing; electric capacity Cx1 is connected with between the input of one-level common mode inductance coil L1; be connected with electric capacity Cx2 between the input of secondary common mode inductance coil L2, between the output of secondary common mode inductance coil L2, be connected with electric capacity Cx3.Wherein, the inductance value≤60mH of common mode inductance coil L1, L2, the capacitance≤5 μ F of electric capacity Cx1, Cx2, Cx3.Certainly, input protection circuit also can be connected to middle-end or the rear end of codan, is connected in parallel with codan, leakage current protection circuit, discharge protection circuit.
The rear end of codan connects with leakage current protection circuit, and the leakage current protection circuit of the present embodiment comprises two electric capacity Cy1, Cy2 being connected in series, earth connection G between two electric capacity Cy1, Cy2, the capacitance≤8.8nF of Cy1, Cy2.Certainly, leakage current protection circuit also can be made up of, all within protection scope of the present invention the electric capacity of multiple parallel connection, series connection.
Leakage current protection circuit connects with discharge protection circuit, and discharge protection circuit is connected with control system for washing machine circuit.Discharge protection circuit comprises power resistor R1, R2, R3, R4.Certainly, discharge protection circuit also can be connected in codan front end, middle-end or rear end, is connected in parallel with codan, pressure-sensitive protective circuit, leakage current protection circuit.
Based on the design of the codan of above-mentioned washing machine, the present embodiment also proposed a kind of washing machine, and the input of washing machine codan connects with utility grid, and output connects with control system for washing machine circuit.Wherein, codan comprises input protection circuit, codan, leakage current protection circuit and discharge protection circuit.Codan is described above, is not described in detail.
Last it is noted that above embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (7)
1. the AF panel module of a washing machine, it is characterized in that: described module comprises input protection circuit, codan and leakage current protection circuit, described input protection circuit, codan and leakage current protection circuit are all connected to utility grid, leakage current protection circuit is exported ground wire and is connected with utility grid ground wire by connecting line, and leakage current protection circuit exports and is connected with control system for washing machine circuit; Described codan comprises the common mode inductance coil L of at least two-stage serial connection, and comprises at least one electric capacity Cx.
2. the AF panel module of washing machine according to claim 1, is characterized in that: described input protection circuit comprises at least one piezo-resistance Rv.
3. the AF panel module of washing machine according to claim 1, is characterized in that: described leakage current protection circuit comprises at least one electric capacity Cy.
4. the AF panel module of washing machine according to claim 3, is characterized in that: the capacitance≤8.8nF of described leakage current protection circuit Cy.
5. the AF panel module of washing machine according to claim 1, is characterized in that: the capacitance≤5 μ F of the inductance value≤60mH of described common mode inductance coil L, electric capacity Cx.
6. the AF panel module of the washing machine according to claim 1-5 any one; it is characterized in that: described module comprises discharge protection circuit, described discharge protection circuit comprises the power resistor R of one or more parallel connection and/or series connection between zero line and live wire.
7. a washing machine, is characterized in that: the control system circuit of described washing machine is connected with utility grid by the AF panel module described in claim 1-6 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310552738.4A CN104638903A (en) | 2013-11-08 | 2013-11-08 | Washing machine and interference suppression module thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310552738.4A CN104638903A (en) | 2013-11-08 | 2013-11-08 | Washing machine and interference suppression module thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104638903A true CN104638903A (en) | 2015-05-20 |
Family
ID=53217324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310552738.4A Pending CN104638903A (en) | 2013-11-08 | 2013-11-08 | Washing machine and interference suppression module thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104638903A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105743334A (en) * | 2016-03-29 | 2016-07-06 | 上海中科深江电动车辆有限公司 | Filtering circuit of low-voltage power supply loop |
| WO2021052205A1 (en) * | 2019-09-17 | 2021-03-25 | 青岛海尔空调电子有限公司 | Surge absorption circuit for single-phase air conditioning system |
| CN113141002A (en) * | 2020-01-20 | 2021-07-20 | 青岛海尔空调电子有限公司 | Surge absorption circuit for three-phase air conditioning system |
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| US5636112A (en) * | 1995-07-13 | 1997-06-03 | Compaq Computer Corporation | Portable computer having built-in AC adapter incorporating a space efficient electromagnetic interference filter |
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| CN102176807A (en) * | 2011-03-08 | 2011-09-07 | 河海大学常州校区 | Self-protective variable frequency modulation ICP (Inductively Coupled Plasma) ballast |
| CN102510210A (en) * | 2011-12-23 | 2012-06-20 | 成都泰格微波技术股份有限公司 | Multifunctional anti-electromagnetic interference (EMI) filter |
| CN202798448U (en) * | 2012-09-13 | 2013-03-13 | 广州三晶电气有限公司 | Output electro magnetic compatibility circuit of photovoltaic grid-connected inverter |
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| CN203632543U (en) * | 2013-11-08 | 2014-06-04 | 海尔集团公司 | Washing machine and interference suppression module thereof |
-
2013
- 2013-11-08 CN CN201310552738.4A patent/CN104638903A/en active Pending
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| US5636112A (en) * | 1995-07-13 | 1997-06-03 | Compaq Computer Corporation | Portable computer having built-in AC adapter incorporating a space efficient electromagnetic interference filter |
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| CN101651408A (en) * | 2009-06-10 | 2010-02-17 | 上海爱瑞科技发展有限公司 | Filtering module inhibiting common mode noise and differential mode noise |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105743334A (en) * | 2016-03-29 | 2016-07-06 | 上海中科深江电动车辆有限公司 | Filtering circuit of low-voltage power supply loop |
| WO2021052205A1 (en) * | 2019-09-17 | 2021-03-25 | 青岛海尔空调电子有限公司 | Surge absorption circuit for single-phase air conditioning system |
| CN113141002A (en) * | 2020-01-20 | 2021-07-20 | 青岛海尔空调电子有限公司 | Surge absorption circuit for three-phase air conditioning system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20160614 Address after: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Applicant after: Qingdao Haier Washing Machine Co., Ltd. Address before: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Applicant before: haier group corporation Applicant before: Qingdao Haier Washing Machine Co., Ltd. |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150520 |
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| RJ01 | Rejection of invention patent application after publication |