CN203632543U - Washing machine and interference suppression module thereof - Google Patents
Washing machine and interference suppression module thereof Download PDFInfo
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- CN203632543U CN203632543U CN201320708386.2U CN201320708386U CN203632543U CN 203632543 U CN203632543 U CN 203632543U CN 201320708386 U CN201320708386 U CN 201320708386U CN 203632543 U CN203632543 U CN 203632543U
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Abstract
本实用新型涉及一种洗衣机及其干扰抑制模块，包括并接于市电电网的输入保护电路、干扰抑制电路和漏电流保护电路，漏电流保护电路输出地线通过连接线与市电电网地线相接，漏电流保护电路输出与洗衣机控制系统电路连接；干扰抑制电路包括至少两级串接的共模电感线圈L，以及包括至少一个电容Cx。本实用新型的干扰抑制模块，通过多组共模电感线圈L增强其干扰抑制效果的稳定性，提高其抗浪涌、抗雷击能力，即使用户家里无地线连接，运行过程中也不会出现触电的情况，大幅提高洗衣机安全性，同时增强洗衣机不同用电环境的适应能力。
The utility model relates to a washing machine and an interference suppression module thereof, comprising an input protection circuit, an interference suppression circuit and a leakage current protection circuit connected in parallel to the mains power grid, and the output ground wire of the leakage current protection circuit is connected to the ground wire of the mains power grid Connected, the leakage current protection circuit output is connected to the washing machine control system circuit; the interference suppression circuit includes at least two stages of common mode inductance coils L connected in series, and includes at least one capacitor Cx. The interference suppression module of the utility model enhances the stability of its interference suppression effect through multiple sets of common-mode inductance coils L, and improves its anti-surge and anti-lightning strike capabilities. In the event of an electric shock, the safety of the washing machine is greatly improved, and at the same time, the adaptability of the washing machine to different electricity environments is enhanced.
Description
Technical field
The utility model belongs to washing machine technical field, specifically, relate to a kind of for filtering washing machine the inhibition module to utility grid electromagnetic interference and adopt the washing machine of described inhibition module.
Background technology
In washing machine electrical system inside, can produce a large amount of electromagnetic interference (EMI) signals 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 frequency conversion frequency, electromagnetic interference (EMI) signal generally has two modes outwards to propagate and disturb utility grid, is by conduction pattern and radiation mode.
At present, codan is widely adopted on washing machine, at the input of its power supply, anti-EMI codan is set, general codan only has attenuation, or electromagnetic interference (EMI) signal is consumed in codan high frequency, low-energy electromagnetic interference (EMI) signal.But weak point is also obvious, shows 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 distributed inductance and distributed capacitance that the lead-in wire that discrete component is grown and the irregular distribution of washing machine electric circuit cause 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 streamline production.
2, a little less than anti-lightning, surge impact ability.Electromagnetic interference (EMI) signal in utility grid and a large amount of surge pulses, lightning impulse pulse also produce and have a strong impact on washing machine electrical system, make its operation irregularity even occur the potential safety hazards such as electric component is quick-fried.And the conventional codan test voltage that generally can only bear surge 1000V, the number of times of simultaneously resisting surge is limited, therefore the interference inhibitory action of conventional codan can reduce greatly, electromagnetic interference (EMI) train of signal on washing machine is entered in utility grid, affect the use of other electric devices.
3, fail safe is poor.Washing machine has become one of requisite household electrical appliance in daily life at present, and user is also more and more higher to its security requirement, and according to GB requirement, as long as the leakage current of washing machine is less than 10mA, it is qualified to think.But consider the particularity of unique user power utilization environment, particularly numerous rural subscribers, a lot of user's familys all do not have ground wire, or imperfect earth, and the leakage current that conventional codan produces is owing to deriving without ground wire, can allow user in use occur comparatively strong electric shock feeling, this is especially large for there being user's harm of heart disease.
Utility model content
The purpose of this utility model is to provide a kind of codan of washing machine, and interference suppressioning effect obviously, antisurge impact capacity is strong, leakage current values is little, safe.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of interference of washing machine suppresses module, comprise input protection circuit, codan and leakage current protective circuit, input protection circuit, codan and leakage current protective circuit are all connected to utility grid, leakage current protective circuit output ground wire joins by connecting line and utility grid ground wire, and the output of leakage current protective circuit is connected with control system for washing machine circuit; Codan comprises at least common mode inductance coil L of two-stage serial connection, and comprises at least one capacitor C x.
Preferably, input protection circuit comprises at least one piezo-resistance Rv.
Preferably, leakage current protective circuit comprises at least one capacitor C y.
Further, capacitance≤8.8nF of leakage current protective circuit Cy, guarantees that the leakage current values that leakage current protective circuit self produces is less than 0.8mA, has guaranteed washing machine electricity consumption fail safe.
Wherein, inductance value≤60mH of common mode inductance coil L, the capacitance≤5 μ F of capacitor C x.
Interference as above suppresses module, 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 disturb the repid discharge that suppresses electric capacity in module after power-off.
Suppress the design of module based on above-mentioned interference, the utility model has also proposed a kind of washing machine, the control system circuit of washing machine disturbs inhibition module and utility grid to join, disturb inhibition module to comprise input protection circuit, codan and leakage current protective circuit, input protection circuit, codan and leakage current protective circuit are all connected to utility grid, leakage current protective circuit output ground wire joins by connecting line and utility grid ground wire, and the output of leakage current protective circuit is connected with control system for washing machine circuit; Codan comprises at least common mode inductance coil L of two-stage serial connection, and comprises at least one capacitor C x.
Compared with prior art, advantage of the present utility model and good effect are: interference of the present utility model suppresses module, in meeting basic interference inhibition requirement, strengthen the stability of its interference suppressioning effect by many groups common mode inductance coil L, not because there is large fluctuation in 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, improve its antisurge, anti-lightning ability, make it to meet the requirement of surge 4000V voltage tester, also because anti-lightning, surge impact repeatedly more, interference rejection capability is not declined to a great extent simultaneously; Most important is by the capacitance of control capacitance Cy, indirectly control its leakage current values to ground wire, make it 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 reaching washing machine user family connects without ground wire, in washing machine running, also there will not be the situation of electric shock, significantly improve washing machine fail safe, strengthen the adaptive capacity of the different power utilization environments of washing machine simultaneously.
Read by reference to the accompanying drawings after the detailed description of the utility model execution mode, other features of the present utility model and advantage will become clearer.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the utility model specific embodiment.
Wherein: the input of L-power firestreak, the input of N-zero-power line, the output of U-power firestreak, the output of V-zero-power line, 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, embodiment of the present utility model is described in detail.
As shown in Figure 1, the codan of washing machine comprises input protection circuit, codan, leakage current protective 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 multiple parallel connections of being connected between live wire L and zero line N and/or multiple piezo-resistances of series connection, all within protection range of the present utility model.
The front end of input protection circuit and codan joins; common mode inductance coil L1, L2 that the codan of the present embodiment comprises two-stage and connects; between the input of one-level common mode inductance coil L1, be connected with capacitor C x1; between the input of secondary common mode inductance coil L2, be connected with capacitor C x2, between the output of secondary common mode inductance coil L2, be connected with capacitor C x3.Wherein, inductance value≤60mH of common mode inductance coil L1, L2, the capacitance≤5 μ F of capacitor C x1, 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 protective circuit, discharge protection circuit.
The rear end of codan and leakage current protective circuit are joined, and the leakage current protective circuit of the present embodiment comprises two capacitor C y1, Cy2 being connected in series, earth connection G between two capacitor C y1, Cy2, capacitance≤8.8nF of Cy1, Cy2.Certainly, leakage current protective circuit also can be made up of the electric capacity of multiple parallel connections, series connection, all within protection range of the present utility model.
Leakage current protective circuit and discharge protection circuit join, 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 protective circuit.
The design of the codan based on above-mentioned washing machine, the present embodiment has also proposed a kind of washing machine, and input and the utility grid of washing machine codan are joined, and output and control system for washing machine circuit join.Wherein, codan comprises input protection circuit, codan, leakage current protective circuit and discharge protection circuit.Codan is described above, is not described in detail.
Finally it should be noted that: above embodiment only, in order to the technical solution of the utility model to be described, is not intended to limit; Although the utility model is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of the each embodiment technical scheme of the utility model.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320708386.2U CN203632543U (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 |
|---|---|---|---|
| CN201320708386.2U CN203632543U (en) | 2013-11-08 | 2013-11-08 | Washing machine and interference suppression module thereof |
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| Publication Number | Publication Date |
|---|---|
| CN203632543U true CN203632543U (en) | 2014-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320708386.2U Expired - Lifetime CN203632543U (en) | 2013-11-08 | 2013-11-08 | Washing machine and interference suppression module thereof |
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| CN (1) | CN203632543U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104638903A (en) * | 2013-11-08 | 2015-05-20 | 海尔集团公司 | Washing machine and interference suppression module thereof |
-
2013
- 2013-11-08 CN CN201320708386.2U patent/CN203632543U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104638903A (en) * | 2013-11-08 | 2015-05-20 | 海尔集团公司 | Washing machine and interference suppression module thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160630 Address after: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Patentee after: QINGDAO HAIER WASHING MACHINE Co.,Ltd. Address before: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Patentee before: HAIER Group Corp. Patentee before: QINGDAO HAIER WASHING MACHINE Co.,Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20140604 |
|
| CX01 | Expiry of patent term |