CN105636421A - Domestic appliance and apparatus for reducing disturbance voltage - Google Patents
Domestic appliance and apparatus for reducing disturbance voltage Download PDFInfo
- Publication number
- CN105636421A CN105636421A CN201610045477.0A CN201610045477A CN105636421A CN 105636421 A CN105636421 A CN 105636421A CN 201610045477 A CN201610045477 A CN 201610045477A CN 105636421 A CN105636421 A CN 105636421A
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- CN
- China
- Prior art keywords
- circuit board
- metallic plate
- panel beating
- board box
- electrical appliance
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0007—Casings
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Detail Structures Of Washing Machines And Dryers (AREA)
- Cookers (AREA)
Abstract
The invention provides a domestic appliance and an apparatus for reducing disturbance voltage. The domestic appliance comprises a circuit board, a circuit board box and a metal plate; the circuit board box is made from an insulating material, and positioned between the circuit board and the metal plate, wherein the domestic appliance also comprises a metal sheet; the metal sheet is arranged between the circuit board and the circuit board box, or between the metal plate and the circuit board box; and the metal sheet, the metal plate and the circuit board are spaced at preset distances mutually, and are not electrically contacted. The invention also provides a method for reducing disturbance voltage of the domestic appliance. According to the domestic appliance and the method for reducing disturbance voltage of the domestic appliance provided by the invention, the dielectric constant and stray capacitance can be effectively lowered so as to reduce the disturbance voltage; and in addition, the domestic appliance has the advantages of simple mounting structure, convenience, and economical and practical performance.
Description
Technical field
The present invention relates to household appliance technical field, particularly relate to a kind of device reducing interference voltage in household electrical appliance.
Background technology
In some household electrical appliance, for the purpose of safety with the restriction in space, power panel is typically disposed in the box inside wall of household electrical appliance, under this mounting structure, power panel, fixed power source plate panel beating between have relatively larger parasitic capacitance, this electric capacity can produce interference voltage, and electrical equipment is had certain infringement by interference voltage, substantially reduce the service life of electrical equipment, so electrical equipment must be carried out the test of interference voltage. Sometimes for by the test of interference voltage, it is necessary to use noise killer, but such relatively costly, especially high-power household electrical appliance, more costly.
In prior art, notification number isCN204131486UChinese invention patent disclose the anti-tampering touch circuit of a kind of washing machine touch key-press, it specifically discloses and includes touching chip, touching chip filter capacitor, described touch chip filter capacitor is connected on described touch chip, and one end of described touch chip filter capacitor connects circuit by the first magnetic bead wave filter and accesses power Vcc end. This scheme is the integrated defect overcoming interference response by mistake and interference voltage test not to pass through of circuit consisted of electricity component, but its operation strategies is smaller.
The Chinese invention patent of notification number CN204325776U discloses a kind of washing machine start-up circuit, and specifically discloses the electrical equipment and annexation that solve to comprise in the washing machine start-up circuit of electromagnetic interference problem. This scheme solves the discontinuous disturbance of washing machine interference voltage by the start-up circuit arranged, but the design of its start-up circuit is complex.
Chinese invention patent application publication number CN101409137A discloses a kind of interference voltage wave filter being used between power supply and electronic product, and specifically disclose interference voltage wave filter and include at least one plane component and planar capacitor, described plane component includes relative a pair coreless spiral plane winding. This scheme solves the interference voltage between power supply and electronic product by interference filter, but it is relatively costly.
Summary of the invention
The device of minimizing interference voltage provided by the invention, it is possible to effectively reduce interference voltage, described device simple structure, with low cost, the interference voltage in household electrical appliance provided by the invention is few.
The present invention provides a kind of household electrical appliance to include circuit board, circuit board box and panel beating, and described circuit board box is that insulant is made, between described circuit board and described panel beating; Wherein, described household electrical appliance also include metallic plate, described metallic plate is placed between described circuit board and described circuit board box or between described panel beating and described circuit board box, and described metallic plate, described panel beating, described circuit board are spaced predeterminable range, and each other without electrical contact.
It is preferred that described household electrical appliance also include box side, described panel beating is fixed on described box side.
It is preferred that described circuit board is power panel, described power panel is provided with electronic component in the one side away from described circuit board box.
It is preferred that described metallic plate is sticked at a side surface of described circuit board box.
It is preferred that described metallic plate is provided with fixing hole, described circuit board box is provided with plastics projection, and during installation, described fixing hole is adaptive with described plastics projection.
It is preferred that the thickness d of described metallic plate sets according to below equation:
In above-mentioned formula, D is the distance between circuit board and panel beating, and described h is the thickness of circuit board box, and described r is reference factor, and its value is r=k(C1-C0), k is proportionality coefficient, and value is 1.0��k��5.0, C1For parasitic capacitance when not installing metallic plate between described panel beating and described circuit board detected, C0For reference threshold, exceed described reference threshold and then illustrate that parasitic capacitance does not reach preset requirement.
The present invention also provides for a kind of method reducing household electrical appliance interference voltage, described household electrical appliance include circuit board, circuit board box and panel beating, and described circuit board box is that insulant is made, between described circuit board and described panel beating, wherein, said method comprising the steps of:
S1 detects the parasitic capacitance value between described circuit board and described panel beating in advance;
S2 judges that whether described parasitic capacitance value is more than predetermined threshold value, if more than or equal to described predetermined threshold value, then enters step S3, if less than, then terminate;
S3 arranges a metallic plate between described circuit board and described circuit board box or between described panel beating and described circuit board box, described metallic plate is sized to the size of corresponding described circuit board size or described panel beating.
It is preferred that described method further comprises the steps of:, between described step S2 and S3, the metallic plate choosing a predetermined thickness.
It is preferred that set the predetermined thickness of described metallic plate as d, determine according to below equation:
In above-mentioned formula, D is the distance between circuit board and panel beating, and described h is the thickness of circuit board box, and described r is reference factor, and its value is r=k(C1-C0), k is proportionality coefficient, and value is 1.0��k��5.0, C1For parasitic capacitance when not installing metallic plate between described panel beating and described circuit board detected, C0For reference threshold, exceed described reference threshold and then illustrate that parasitic capacitance does not reach preset requirement.
The household electrical appliance of the present invention and the method for minimizing household electrical appliance interference voltage can effectively reduce dielectric constant and parasitic capacitance value by arranging metallic plate, thus realizing reducing interference voltage, and have the advantage that mounting structure is simple, convenient, economical and practical.
Accompanying drawing explanation
Fig. 1 is the structural representation of the household electrical appliance of a preferred embodiment of the present invention.
Fig. 2 is the circuit board top view of the household electrical appliance of a preferred embodiment of the present invention.
Fig. 3 is A-A generalized section in Fig. 2.
Fig. 4 is the enlarged diagram at B place in Fig. 3.
Fig. 5 is the schematic flow sheet of the method reducing household electrical appliance interference voltage of a preferred embodiment of the present invention.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in detail. If it should be noted that do not conflict, the embodiment of the present invention and each feature in embodiment can be combined with each other, all within protection scope of the present invention.
Embodiment 1
Referring to Fig. 1-4, Fig. 1 is the structural representation of the household electrical appliance of a preferred embodiment of the present invention. Fig. 2 is the circuit board top view of the household electrical appliance of a preferred embodiment of the present invention. Fig. 3 is A-A generalized section in Fig. 2. Fig. 4 is the enlarged diagram at B place in Fig. 3.
As shown in Figures 1 to 4, the present invention provides a kind of household electrical appliance to include circuit board, circuit board box and panel beating, and described circuit board box is that insulant is made, between described circuit board and described panel beating; Wherein, described household electrical appliance also include metallic plate, described metallic plate is placed between described circuit board and described circuit board box or between described panel beating and described circuit board box, and described metallic plate, described panel beating, described circuit board are spaced predeterminable range, and each other without electrical contact. The household electrical appliance of the present invention can effectively reduce dielectric constant and parasitic capacitance value by arranging metallic plate, thus realizing reducing interference voltage, and has the advantage that mounting structure is simple, convenient, economical and practical.
Specifically, described metallic plate 3, described circuit board box 4 are between described panel beating 1 and described circuit board 2, described metallic plate 3 and described circuit board 2, described panel beating 1 are without electrical contact, described metallic plate 3 is fixed in the one side of described circuit board box 4, described panel beating 1, described circuit board 2, described metallic plate 3 are spaced predeterminable range, and described panel beating 1, described circuit board 2, described circuit board box 4 are spaced predeterminable range. Circuit board 2 described in described metallic plate 3 area covering. Described metallic plate 3 can be replaced by graphite, and described metallic plate 3 also can be replaced by other conductor materials. Described metallic plate 3 is located adjacent in the one side of the described circuit board box 4 of described circuit board 2; Or described metallic plate 3 is located remotely from the one side of described circuit board box 4 of described circuit board 2. Described metallic plate 3 may be additionally located between described panel beating 1 and described circuit board box 4, and described metallic plate 3 is connected with described circuit board box 4 by insulating support, and described metallic plate 3, described panel beating 1, described circuit board box 4 are spaced predeterminable range; Or described metallic plate 3 is between described circuit board 2 and described circuit board box 4, described metallic plate 3 is connected with described circuit board box 4 by insulating support, and described metallic plate 3, described circuit board 2, described circuit board box 4 are spaced predeterminable range. Described metallic plate 3 can also pass through insulating support and be connected with described circuit board 2, and described metallic plate 3 is between described circuit board 2 and described circuit board box 4, and described metallic plate 3, described circuit board 2, described circuit board box 4 are spaced predeterminable range; Or described metallic plate 3 is connected with described panel beating 1 by insulating support, described metallic plate 3 is between described panel beating 1 and described circuit board box 4, and described metallic plate 3, described panel beating 1, described circuit board box 4 are spaced predeterminable range.
As shown in Figure 4, described household electrical appliance also include box side 8, and described panel beating 1 is fixed on described box side 8.
As shown in Figures 2 and 3, described circuit board 2 is provided with first electronic component the 5, second electronic component the 6, the 3rd electronic component 7, and other electricity components on described circuit board 2 just no longer repeat one by one.
Further, described circuit board 2 is power panel, and described power panel is provided with electronic component in the one side away from described circuit board box.
Further, described metallic plate 3 is sticked at a side surface of described circuit board box.
Further, described metallic plate 3 is provided with fixing hole, and described circuit board box is provided with plastics projection, and during installation, described fixing hole is adaptive with described plastics projection.
Further, the thickness d of described metallic plate sets according to below equation:
In above-mentioned formula, D is the distance between circuit board and panel beating, and described h is the thickness of circuit board box, and described r is reference factor, and its value is r=k(C1-C0), k is proportionality coefficient, and value is 1.0��k��5.0, C1For parasitic capacitance when not installing metallic plate between described panel beating and described circuit board detected, C0For reference threshold, exceed described reference threshold and then illustrate that parasitic capacitance does not reach preset requirement. The preferably span of usual k is 2.2��3.6, and best value is 2.8, and k value is generally according to being actually needed free appointment. By the metallic plate that above-mentioned formula is chosen, the saving of material can be taken into account, in carrying out reduction interference, obtain preferably effect simultaneously.
Refer to the schematic flow sheet of method reducing household electrical appliance interference voltage that Fig. 5, Fig. 5 are preferred embodiments of the present invention. As it is shown in figure 5, the present invention also provides for a kind of method reducing household electrical appliance interference voltage, described household electrical appliance include circuit board, circuit board box and panel beating, described circuit board box is that insulant is made, between described circuit board and described panel beating, wherein, said method comprising the steps of:
S1 detects the parasitic capacitance value between described circuit board and described panel beating in advance;
S2 judges that whether described parasitic capacitance value is more than predetermined threshold value, if more than or equal to described predetermined threshold value, then enters step S3, if less than, then terminate;
S3 arranges a metallic plate between described circuit board and described circuit board box or between described panel beating and described circuit board box, described metallic plate is sized to the size of corresponding described circuit board size or described panel beating.
The method reducing household electrical appliance interference voltage of the present invention can effectively reduce dielectric constant and parasitic capacitance value by arranging metallic plate, thus realizing reducing interference voltage, and has the advantage that mounting structure is simple, convenient, economical and practical.
Further, described method also includes step S4 between described step S2 and S3, chooses the metallic plate of a predetermined thickness.
Further, if the predetermined thickness of described metallic plate is d, determine according to below equation:
In above-mentioned formula, D is the distance between circuit board and panel beating, and described h is the thickness of circuit board box, and described r is reference factor, and its value is r=k(C1-C0), k is proportionality coefficient, and value is 1.0��k��5.0, C1For parasitic capacitance when not installing metallic plate between described panel beating and described circuit board detected, C0For reference threshold, exceed described reference threshold and then illustrate that parasitic capacitance does not reach preset requirement.
The foregoing is only embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure utilizing description of the present invention and accompanying drawing content to make or equivalence flow process conversion; or directly or indirectly it is used in other relevant technical fields, all in like manner include in the scope of patent protection of the present invention.
Claims (9)
1. household electrical appliance, including circuit board, circuit board box and panel beating, described circuit board box is that insulant is made and between described circuit board and described panel beating; It is characterized in that, described household electrical appliance also include metallic plate, described metallic plate is placed between described circuit board and described circuit board box, or described metallic plate is placed between described panel beating and described circuit board box, described metallic plate, described panel beating, described circuit board are spaced predeterminable range, and each other without electrical contact.
2. household electrical appliance as claimed in claim 1, it is characterised in that described household electrical appliance also include box side, and described panel beating is fixed on described box side.
3. household electrical appliance as claimed in claim 1, it is characterised in that described circuit board is power panel, and described power panel is provided with electronic component in the one side away from described circuit board box.
4. household electrical appliance as claimed in claim 1, it is characterised in that described metallic plate is sticked at a side surface of described circuit board box.
5. household electrical appliance as claimed in claim 1, it is characterised in that described metallic plate is provided with fixing hole, and described circuit board box is provided with plastics projection, during installation, described fixing hole is adaptive with described plastics projection.
6. the household electrical appliance as described in any one of claim 1 to 5, it is characterised in that the thickness d of described metallic plate sets according to below equation:
In above-mentioned formula, D is the distance between circuit board and panel beating, and described h is the thickness of circuit board box, and described r is reference factor, and its value is r=k(C1-C0), k is proportionality coefficient, and value is 1.0��k��5.0, C1For parasitic capacitance when not installing metallic plate between described panel beating and described circuit board detected, C0For reference threshold, exceed described reference threshold and then illustrate that parasitic capacitance does not reach preset requirement.
7. the method reducing household electrical appliance interference voltage, described household electrical appliance include circuit board, circuit board box and panel beating, described circuit board box is that insulant is made and between described circuit board and described panel beating, it is characterised in that said method comprising the steps of:
1) parasitic capacitance value between described circuit board and described panel beating is detected in advance;
2) judge that whether described parasitic capacitance value is more than predetermined threshold value, if more than or equal to described predetermined threshold value, then enter step 3), if less than, then terminate;
3) arranging a metallic plate between described circuit board and described circuit board box or between described panel beating and described circuit board box, described metallic plate is sized to the size of corresponding described circuit board size or described panel beating.
8. the as claimed in claim 7 method reducing household electrical appliance interference voltage, it is characterised in that described method is in described step 2) and step 3) between also include: choose the metallic plate of a predetermined thickness.
9. the as claimed in claim 8 method reducing household electrical appliance interference voltage, it is characterised in that set the predetermined thickness of described metallic plate as d, determine according to below equation:
In above-mentioned formula, D is the distance between circuit board and panel beating, and described h is the thickness of circuit board box, and described r is reference factor, and its value is r=k(C1-C0), k is proportionality coefficient, and value is 1.0��k��5.0, C1For parasitic capacitance when not installing metallic plate between described panel beating and described circuit board detected, C0For reference threshold, exceed described reference threshold and then illustrate that parasitic capacitance does not reach preset requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610045477.0A CN105636421B (en) | 2016-01-22 | 2016-01-22 | Household appliance and device for reducing interference voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610045477.0A CN105636421B (en) | 2016-01-22 | 2016-01-22 | Household appliance and device for reducing interference voltage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105636421A true CN105636421A (en) | 2016-06-01 |
| CN105636421B CN105636421B (en) | 2020-04-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610045477.0A Active CN105636421B (en) | 2016-01-22 | 2016-01-22 | Household appliance and device for reducing interference voltage |
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| Country | Link |
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| CN (1) | CN105636421B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110324994A (en) * | 2018-03-28 | 2019-10-11 | 青岛海尔滚筒洗衣机有限公司 | Power panel box and dryer |
| CN110325006A (en) * | 2018-03-28 | 2019-10-11 | 青岛海尔滚筒洗衣机有限公司 | Power panel box mounting structure and household electrical appliance |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060154526A1 (en) * | 2005-01-07 | 2006-07-13 | Funai Electric Co., Ltd. | Printed circuit board and electronic apparatus equipped with the same |
| CN103677455A (en) * | 2012-09-10 | 2014-03-26 | 海信（山东）冰箱有限公司 | Power grid interference preventing working circuit for refrigerator capacitive touch screen |
-
2016
- 2016-01-22 CN CN201610045477.0A patent/CN105636421B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060154526A1 (en) * | 2005-01-07 | 2006-07-13 | Funai Electric Co., Ltd. | Printed circuit board and electronic apparatus equipped with the same |
| CN103677455A (en) * | 2012-09-10 | 2014-03-26 | 海信（山东）冰箱有限公司 | Power grid interference preventing working circuit for refrigerator capacitive touch screen |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110324994A (en) * | 2018-03-28 | 2019-10-11 | 青岛海尔滚筒洗衣机有限公司 | Power panel box and dryer |
| CN110325006A (en) * | 2018-03-28 | 2019-10-11 | 青岛海尔滚筒洗衣机有限公司 | Power panel box mounting structure and household electrical appliance |
| CN110324994B (en) * | 2018-03-28 | 2022-04-12 | 青岛海尔洗涤电器有限公司 | Power supply board box and clothes dryer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105636421B (en) | 2020-04-17 |
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