CN209748407U - Household appliance grounding device, household appliance controller and household appliance - Google Patents
Household appliance grounding device, household appliance controller and household appliance Download PDFInfo
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- CN209748407U CN209748407U CN201920832471.7U CN201920832471U CN209748407U CN 209748407 U CN209748407 U CN 209748407U CN 201920832471 U CN201920832471 U CN 201920832471U CN 209748407 U CN209748407 U CN 209748407U
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Abstract
The utility model provides a household appliance grounding device, a household appliance controller and a household appliance, wherein the household appliance grounding device comprises a circuit board, a first grounding point and a second grounding point which are arranged on the circuit board, and a filter circuit connected with the first grounding point and the second grounding point, and the filter circuit carries out filtering processing on signals transmitted between the first grounding point and the second grounding point; the first grounding point is connected with a grounding wire connecting end on a controller circuit board of the household appliance so as to be connected with a grounding wire of a power wire; and the second grounding point is respectively connected with the live wire connecting end, the zero line connecting end and the exposed conductive part of the household appliance on the controller circuit board of the household appliance so as to be connected with the live wire and the zero line of the power line and connect the exposed conductive part of the household appliance with the ground wire through the filter circuit. The utility model discloses effectively restrain the complete machine and expose the interference of conducting part, improve the EMC design effect of complete machine, circuit design is simple easily installs, improves assembly efficiency, reduces design cost.
Description
Technical Field
The utility model relates to the technical field of household appliances, especially, relate to a household appliance earthing device, household appliance controller and household appliance.
Background
At present, appliances of household appliances have safety grounding requirements, namely three-plug power lines are generally adopted for connection, and the appliances also comprise a ground wire besides a conventional zero-fire wire. In the prior art, when a household appliance is electrified to work, the ground wire is directly connected with the exposed conductive part of the whole machine in a connecting mode. For a type of appliance with a controller, this connection has the problem that interference signals of the controller are radiated to the exposed conductive part and then flow through the power line and ground into the EMC (electromagnetic compatibility) test equipment, thereby often causing EMC test failure or insufficient margin.
In view of the above problems, the conventional solutions in the prior art mainly solve the EMC problem by winding a magnetic ring around a power line or by shielding the controller itself of the household appliance. However, the method not only has poor interference filtering effect and greatly increases design cost, but also causes problems of low assembly efficiency, difficult assembly and the like caused by insufficient assembly space, and affects the mass production and marketing of products.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a domestic appliance earthing device, domestic appliance controller and domestic appliance to solve the problem that the filtering effect that the mode of current solution EMC problem exists is poor, the design cost is high and influence assembly efficiency.
The embodiment of the utility model provides a household appliance grounding device, including the circuit board and set up first ground point, second ground point on the circuit board and with the filter circuit of first ground point, second ground point electricity connection, filter circuit is used for carrying out filtering processing to the signal of transmission between first ground point and the second ground point; the first grounding point is connected with a grounding wire connecting end on a controller circuit board of the household appliance so as to be connected with a grounding wire of a power wire; the second grounding point is respectively connected with the live wire connecting end and the zero line connecting end on the controller circuit board of the household appliance and the exposed conductive part of the household appliance so as to be connected with the live wire and the zero line of the power line and connect the exposed conductive part of the household appliance with the ground wire of the power line through the filter circuit.
Optionally, the filter circuit is implemented by using a filter device.
Optionally, the filter device is a high-frequency interference suppression device, and includes a magnetic bead, an inductor, or a magnetic ring.
The embodiment of the utility model also provides a household appliance controller, be provided with first ground point, second ground point and with the filter circuit of first ground point, second ground point electricity connection on the controller circuit board of controller, filter circuit is used for carrying out filtering processing to the signal of transmission between first ground point and the second ground point; the first grounding point is connected with the ground wire connecting end on the controller circuit board so as to be connected with the ground wire of the power wire; the second grounding point is respectively connected with the live wire connecting end and the zero line connecting end on the controller circuit board and the exposed conductive part of the household appliance so as to be connected with the live wire and the zero line of the power line and connect the exposed conductive part of the household appliance with the ground wire of the power line through the filter circuit.
optionally, the filter circuit is implemented by using a filter device.
Optionally, the filter device is a high-frequency interference suppression device, and includes a magnetic bead, an inductor, or a magnetic ring.
The embodiment of the utility model provides a still provide a domestic appliance, domestic appliance includes as above domestic appliance earthing device, and/or as above domestic appliance controller.
Optionally, the exposed conductive portion comprises a metal housing or a metal ground plate.
Optionally, a ground terminal is disposed on the metal casing or the metal ground plate, and the second ground point is connected to the ground terminal through a conductive wire.
The embodiment of the utility model provides a household electrical appliance earthing device, household electrical appliance controller and household electrical appliance can effectively improve the EMC test that conventional ground connection mode arouses and become invalid or the surplus not enough problem, effectively restrain the complete machine and expose the conducting part low frequency common mode interference amplitude, improve the EMC design effect of complete machine. And, the utility model discloses circuit design is simple easily to be installed, can improve assembly efficiency greatly, reduces design cost.
The above description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of the present invention is given.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
Fig. 1 is a schematic structural diagram of a grounding device for a household electrical appliance according to an embodiment of the present invention;
Fig. 2 is a schematic structural diagram of a household appliance controller according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It will be understood by those within the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Fig. 1 is a block diagram of a grounding device for a household electrical appliance according to an embodiment of the present invention. As shown in fig. 1, an embodiment of the present invention provides a grounding device for a household electrical appliance, including a circuit board 10, a first grounding point 101 and a second grounding point 102 disposed on the circuit board 10, and a filter circuit 103 electrically connected to the first grounding point 101 and the second grounding point 102, where the filter circuit 103 is configured to filter a signal transmitted between the first grounding point 101 and the second grounding point 102; the first grounding point 101 is connected with a grounding wire connecting end on a controller circuit board of the household appliance so as to be connected with a grounding wire of the power wire 30; the second ground point 102 is connected to the live wire connection end and the zero wire connection end of the controller circuit board of the household appliance, and the exposed conductive portion 40 of the household appliance, respectively, to connect the live wire and the zero wire of the power line 30, and connect the exposed conductive portion of the household appliance to the ground wire of the power line through the filter circuit. Further, in order to facilitate the connection between the exposed conductive portion 40 and the second grounding point 102, a grounding terminal 401 is disposed on the metal casing or the metal grounding plate in the present embodiment, and the second grounding point 102 is connected to the grounding terminal 401 through a conductive wire.
In this embodiment, the ground wire connection end, the live wire connection end and the zero line connection end on the controller circuit board are used for connecting a three-plug power line of the ground wire.
In this embodiment, the first grounding point 101 and the filter circuit 103 may be electrically connected through a wire or a copper foil on a PCB, and the filter circuit 103 and the second grounding point 102 may be electrically connected through a wire or a copper foil on a PCB.
In this embodiment, the second ground point 102 is connected to the live line connection end and the neutral line connection end of the controller circuit board through a Y capacitor or an X capacitor, respectively, and the connection mode is a wire electrical connection.
the embodiment of the utility model provides an in, filter circuit 103 can adopt the filter device to realize, filter circuit has the function of filtering high frequency interference signal. Specifically, the filter device includes a magnetic bead, an inductor, or a magnetic ring, and other high-frequency interference suppression devices that pass low frequencies and block high frequencies.
It should be noted that, above is only a better more succinct implementation, and first ground point and second ground point on the earthing device circuit board can increase quantity according to concrete design, the utility model discloses do not specifically limit to this.
The embodiment of the utility model provides a domestic appliance earthing device is independent of the domestic appliance controller and realizes, through setting up two ground points on the circuit board, first ground point and second ground point promptly, first ground point is connected with the ground wire link on the controller circuit board of domestic appliance, with the ground wire of connecting power cord, through the live wire link on second ground point and the controller circuit board of domestic appliance, the zero line link, and domestic appliance's the electrically conductive part that exposes is connected, with the live wire of connecting power cord, the zero line, and pass through the filter circuit with domestic appliance's the electrically conductive part that exposes and be connected with the ground wire of power cord. The embodiment of the utility model provides an in, the domestic appliance controller radiates to expose conducting part's high frequency interference signal and passes through Y electric capacity flow fire (L) behind the second ground point, zero (N) line most return interference source itself, and form from the loop, and through at first ground point, set up logical low frequency between the second ground point, hinder the filter circuit of frequency, make the interference signal of controller can't flow in the ground wire of power cord, thereby the EMC test result has been improved greatly, this kind of connected mode neither can influence the function of complete machine safety ground, can increase the filter effect of PCB board function ground again.
Fig. 2 is a block diagram of a grounding device for a household electrical appliance according to an embodiment of the present invention. As shown in fig. 2, the embodiment of the present invention provides a controller of a household electrical appliance, wherein a controller circuit board 20 is provided with a first grounding point 201, a second grounding point 202, and a filter circuit 203 electrically connected to the first grounding point 201 and the second grounding point 202, and the filter circuit 203 is configured to filter a signal transmitted between the first grounding point 201 and the second grounding point 202; the first grounding point 201 is connected with the ground wire connecting end on the controller circuit board so as to be connected with the ground wire of the power wire 30; the second ground point 202 is connected to the live wire connection end and the zero wire connection end of the controller circuit board, and the exposed conductive portion of the household appliance, respectively, to connect the live wire and the zero wire of the power line 30, and connect the exposed conductive portion 40 of the household appliance to the ground wire of the power line through the filter circuit 203. Further, in order to facilitate the connection between the exposed conductive portion 40 and the second grounding point 202, a grounding terminal 401 is disposed on the metal casing or the metal grounding plate in this embodiment, and the second grounding point 202 is connected to the grounding terminal 401 through a conductive wire.
In this embodiment, the ground wire connection end, the live wire connection end and the neutral wire connection end on the controller circuit board 20 are used for connecting three-plug power lines of the ground wire.
In this embodiment, the first grounding point 201 and the filter circuit 203 can be electrically connected through a wire or a copper foil on a PCB, and the filter circuit 203 and the second grounding point 202 can be electrically connected through a wire or a copper foil on a PCB.
In this embodiment, the second ground point 202 is connected to the live line connection end and the neutral line connection end of the controller circuit board through a Y capacitor or an X capacitor, respectively, and the connection mode is an electrical connection through a copper foil on the PCB.
The embodiment of the utility model provides an in, filter circuit 203 can adopt the filter device to realize, filter circuit has the function of filtering high frequency interference signal. Specifically, the filter device includes a magnetic bead, an inductor, or a magnetic ring, and other high-frequency interference suppression devices that pass low frequencies and block high frequencies.
It should be noted that, the above is only an optional implementation manner, and the first grounding point and the second grounding point on the controller circuit board may be increased in number according to a specific design, and the present invention is not specifically limited to this.
The embodiment of the utility model provides a household appliance controller, through reserving two ground points on controller circuit board 20, first ground point and second ground point promptly, first ground point is connected with the ground wire link on the controller circuit board, with the ground wire of connecting the power cord, through the live wire link on second ground point and the controller circuit board, the zero line link, and household appliance's the conductive part that exposes is connected, with the live wire of connecting the power cord, the zero line, and pass through filter circuit with household appliance's the conductive part that exposes and be connected with the ground wire of power cord. The utility model discloses a set up logical low frequency, hinder the filter circuit of frequency between first ground point, second ground point for the interfering signal of controller can't flow in the ground wire of power cord, thereby improved the EMC test result greatly, this kind of connected mode neither can influence the function of complete machine safety ground, can increase the filtering effect of PCB board function ground again.
In addition, the embodiment of the present invention further provides a household appliance, which includes the grounding device of the household appliance as described in any one of the above embodiments, and/or the controller of the household appliance as described in any one of the above embodiments.
Specifically, the exposed conductive portion in this embodiment includes an exposed conductive material of the household appliance, such as a metal shell or a metal ground plate.
Further, in order to facilitate the connection between the exposed conductive portion and the second grounding point, a grounding terminal is disposed on the metal casing or the metal grounding plate in this embodiment, and the second grounding point is connected to the grounding terminal through a conductive wire.
The embodiment of the utility model provides a, assemble household electrical appliances earthing device in household electrical appliances or improve the household electrical appliances controller, through the first ground point at the connection ground wire, connect and set up logical low frequency, hinder the filter circuit of high frequency between the second ground point of household electrical appliances's the conductive part that exposes, make the interfering signal of controller can't flow in the ground wire of power cord, thereby improved the EMC test result greatly, this kind of connected mode neither can influence the function of complete machine safety ground, can increase the filter effect of PCB board function ground again.
The embodiment of the utility model provides a household electrical appliance earthing device, household electrical appliance controller and household electrical appliance can effectively improve the EMC test that conventional ground connection mode arouses and become invalid or the surplus not enough problem, effectively restrain the complete machine and expose the conducting part low frequency common mode interference amplitude, improve the EMC design effect of complete machine. And, the utility model discloses circuit design is simple easily to be installed, can improve assembly efficiency greatly, reduces design cost.
In the specification of the present invention, a large number of specific details are explained. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.
Claims (9)
1. A household appliance grounding device is characterized by comprising a circuit board, a first grounding point, a second grounding point and a filter circuit, wherein the first grounding point and the second grounding point are arranged on the circuit board, the filter circuit is electrically connected with the first grounding point and the second grounding point, and the filter circuit is used for filtering signals transmitted between the first grounding point and the second grounding point; the first grounding point is connected with a grounding wire connecting end on a controller circuit board of the household appliance so as to be connected with a grounding wire of a power wire; the second grounding point is respectively connected with the live wire connecting end and the zero line connecting end on the controller circuit board of the household appliance and the exposed conductive part of the household appliance so as to be connected with the live wire and the zero line of the power line and connect the exposed conductive part of the household appliance with the ground wire of the power line through the filter circuit.
2. The home appliance grounding device of claim 1, wherein said filter circuit is implemented using a filter device.
3. The grounding device of claim 2, wherein said filter device is a high frequency interference suppression device comprising a magnetic bead, an inductor or a magnetic ring.
4. A controller of a household appliance is characterized in that a controller circuit board of the controller is provided with a first grounding point, a second grounding point and a filter circuit electrically connected with the first grounding point and the second grounding point, wherein the filter circuit is used for filtering signals transmitted between the first grounding point and the second grounding point; the first grounding point is connected with the ground wire connecting end on the controller circuit board so as to be connected with the ground wire of the power wire; the second grounding point is respectively connected with the live wire connecting end and the zero line connecting end on the controller circuit board and the exposed conductive part of the household appliance so as to be connected with the live wire and the zero line of the power line and connect the exposed conductive part of the household appliance with the ground wire of the power line through the filter circuit.
5. The controller for household appliances according to claim 4, wherein the filter circuit is implemented using a filter device.
6. A household appliance controller as claimed in claim 5, wherein said filter device is a high frequency interference suppression device comprising a magnetic bead, an inductor or a magnetic ring.
7. A domestic appliance comprising a domestic appliance grounding device as claimed in any one of claims 1 to 3 and/or a domestic appliance controller as claimed in any one of claims 4 to 6.
8. The household appliance of claim 7, wherein the exposed conductive portion comprises a metal housing or a metal ground plate.
9. The household appliance according to claim 8, wherein a ground terminal is provided on the metal housing or the metal ground plate, and the second ground point is connected to the ground terminal by a conductive wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920832471.7U CN209748407U (en) | 2019-06-03 | 2019-06-03 | Household appliance grounding device, household appliance controller and household appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920832471.7U CN209748407U (en) | 2019-06-03 | 2019-06-03 | Household appliance grounding device, household appliance controller and household appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209748407U true CN209748407U (en) | 2019-12-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920832471.7U Active CN209748407U (en) | 2019-06-03 | 2019-06-03 | Household appliance grounding device, household appliance controller and household appliance |
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| Country | Link |
|---|---|
| CN (1) | CN209748407U (en) |
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- 2019-06-03 CN CN201920832471.7U patent/CN209748407U/en active Active
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