CN215934742U - Rectifying and filtering circuit, control circuit and household appliance - Google Patents
Rectifying and filtering circuit, control circuit and household appliance Download PDFInfo
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- CN215934742U CN215934742U CN202121305000.4U CN202121305000U CN215934742U CN 215934742 U CN215934742 U CN 215934742U CN 202121305000 U CN202121305000 U CN 202121305000U CN 215934742 U CN215934742 U CN 215934742U
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Abstract
The application provides a rectification filter circuit, control circuit and domestic appliance, this rectification filter circuit includes: a power input terminal for inputting a voltage; the discharging module is electrically connected with the power supply input end; the filtering module is electrically connected with the discharging module and is used for filtering the input voltage of the power supply input end; the rectification module is electrically connected with the filtering module and is used for rectifying the input voltage output by the power input end; the discharging module is used for consuming the voltage stored in the filtering module when the voltage input at the power supply input end is stopped. Compared with the prior art, the discharging module is arranged in front of the rectifying module and the filtering module, so that when the voltage output of the power input end is stopped, the voltage stored in the filtering module is consumed, the electric shock condition of a user caused by the voltage stored in the filtering module is effectively avoided, and the safety of the rectifying and filtering circuit is improved.
Description
Technical Field
The application relates to the technical field of circuits, in particular to a rectifying and filtering circuit, a control circuit and a household appliance.
Background
Electromagnetic Compatibility (EMC) is a comprehensive assessment of the interference level and the anti-interference capability of electronic products in terms of electromagnetic fields, and is one of the most important indexes of product quality. National regulations require that household appliances also meet EMC requirements, such as air conditioners. The design of present air conditioner does not have filter circuit's design in the front of rectifier bridge, and clutter in the commercial power can't be avoided like this when passing through the rectifier bridge, radiates to the follow-up switching power supply module of daily household electrical appliances in, also can't reduce the radiation and the conduction of air conditioner during operation to the electric wire netting simultaneously.
However, in order to meet EMC requirements, after the filter circuit is arranged in front of the rectifier bridge, when a user disconnects the air conditioner power plug (AC-L, AC-N), the stored electric quantity in the X capacitor is released instantly and along the direction of the power plug (AC-L, AC-N), which is easy to cause the safety hazard of electric shock of the user.
Therefore, how to effectively improve the safety performance of the household electrical appliance is a technical problem which needs to be solved urgently in the current circuit technical field.
SUMMERY OF THE UTILITY MODEL
The application provides a rectification filter circuit, a control circuit and a household appliance, and aims to solve the problem of effectively improving the safety performance of the household appliance.
In one aspect, the present application provides a rectifying and filtering circuit, including:
a power input terminal for inputting a voltage;
the discharging module is electrically connected with the power supply input end;
the filtering module is electrically connected with the discharging module and is used for filtering the input voltage of the power supply input end;
the rectification module is electrically connected with the filtering module and is used for rectifying the input voltage output by the power supply input end;
the discharging module is used for consuming the voltage stored in the filtering module when the voltage input at the power supply input end is stopped.
In a possible implementation manner of the application, the power input end comprises a live wire and a zero line, the discharging module is connected in parallel between the live wire and the zero line, the discharging module comprises a first resistance unit, and the first resistance unit is connected in parallel between the live wire and the zero line.
In a possible implementation manner of the present application, the first resistance unit includes a first resistor, and the first resistor is connected in parallel between the live wire and the zero wire.
In one possible implementation manner of the present application, the first resistor is an oxide film resistor.
In a possible implementation manner of the present application, the first resistance unit includes at least two second resistances, the at least two second resistances are connected in parallel, and each of the at least two second resistances is connected in parallel between the live line and the zero line.
In one possible implementation manner of the present application, the second resistor is a chip resistor.
In a possible implementation manner of the present application, the discharging module further includes a second resistance unit, the second resistance unit is connected in series with the first resistance unit, the first resistance unit is connected in parallel with the second resistance unit between the live wire and the zero line, the second resistance unit includes at least two third resistances, and the at least two third resistances are connected in parallel with each other.
In a possible implementation manner of the present application, the filtering module includes a first capacitor, a common mode inductor and a second capacitor, the first capacitor is connected in parallel between the live wire and the zero line, the first input end of the common mode inductor with the one end of the discharging module the one end of the first capacitor is electrically connected, the second input end of the common mode inductor with the other end of the discharging module the other end of the first capacitor is electrically connected, the first output end of the common mode inductor with the first end of the second capacitor the first input end of the rectifying module is electrically connected, the second output end of the common mode inductor with the second end of the second capacitor the second input end of the rectifying module is electrically connected.
In a possible implementation manner of the present application, the rectification filter circuit further includes an anti-surge module, the anti-surge module is connected in parallel between the live wire and the zero line, and is configured to absorb an instantaneous overvoltage in a voltage signal output by the live wire.
In a possible implementation manner of the present application, a fuse is further electrically connected between the live wire and the first resistance unit.
In another aspect, the present application further provides a control circuit, which includes the rectification filter circuit.
In another aspect, the application also provides a household appliance comprising the control circuit.
The application provides a rectification filter circuit, this circuit includes: a power input terminal for inputting a voltage; the discharging module is electrically connected with the power supply input end; the filtering module is electrically connected with the discharging module and is used for filtering the input voltage of the power supply input end; the rectification module is electrically connected with the filtering module and is used for rectifying the input voltage output by the power input end; the discharging module is used for consuming the voltage stored in the filtering module when the voltage input at the power supply input end is stopped. Compared with the prior art, the discharging module is arranged in front of the rectifying module and the filtering module, so that when the voltage output of the power input end is stopped, the voltage stored in the filtering module is consumed, the electric shock condition of a user caused by the voltage stored in the filtering module is effectively avoided, and the safety of the rectifying and filtering circuit is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of a rectifying and filtering circuit provided in an embodiment of the present application;
fig. 2 is a schematic structural diagram of another embodiment of a rectifying and filtering circuit provided in the embodiment of the present application;
fig. 3 is a schematic structural diagram of another embodiment of a rectifying and filtering circuit according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be considered as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In this application, the word "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the application. In the following description, details are set forth for the purpose of explanation. It will be apparent to one of ordinary skill in the art that the present application may be practiced without these specific details. In other instances, well-known structures and processes are not set forth in detail in order to avoid obscuring the description of the present application with unnecessary detail. Thus, the present application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.
The embodiment of the application provides a rectification filter circuit, control circuit and domestic appliance, and this rectification filter circuit includes: a power input terminal for inputting a voltage; the discharging module is electrically connected with the power supply input end; the filtering module is electrically connected with the discharging module and is used for filtering the input voltage of the power supply input end; the rectification module is electrically connected with the filtering module and is used for rectifying the input voltage output by the power input end; the discharging module is used for consuming the voltage stored in the filtering module when the power input end stops inputting the voltage, and the details are respectively described below.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of a rectifying and filtering circuit according to an embodiment of the present disclosure. The rectifying and filtering circuit comprises: a power input terminal 101 for inputting a voltage; the discharging module 102 is electrically connected with the power supply input end; the filtering module 103 is electrically connected with the discharging module and is used for filtering the input voltage of the power supply input end; the rectifying module 104 is electrically connected with the filtering module and is used for rectifying the input voltage output by the power input end; the discharging module is used for consuming the voltage stored in the filtering module when the voltage input at the power supply input end is stopped.
The application provides a rectification filter circuit, this circuit includes: a power input terminal for inputting a voltage; the discharging module is electrically connected with the power supply input end; the filtering module is electrically connected with the discharging module and is used for filtering the input voltage of the power supply input end; the rectification module is electrically connected with the filtering module and is used for rectifying the input voltage output by the power input end; the discharging module is used for consuming the voltage stored in the filtering module when the voltage input at the power supply input end is stopped. Compared with the prior art, the discharging module is arranged in front of the rectifying module and the filtering module, so that when the voltage output of the power input end is stopped, the voltage stored in the filtering module is consumed, the electric shock condition of a user caused by the voltage stored in the filtering module is effectively avoided, and the safety of the rectifying and filtering circuit is improved.
In the embodiment of the present application, the power input end includes live wire L and zero line N, the module of discharging is parallelly connected the live wire with between the zero line, the module of discharging includes first resistance unit 105, first resistance unit is parallelly connected the live wire with between the zero line.
In the embodiment of the present application, the first resistance unit includes a first resistor R1, and the first resistor is connected in parallel between the live wire and the neutral wire.
In an embodiment of the present application, the first resistor is an oxide film resistor.
Referring to fig. 1 to fig. 3, in an embodiment of the present application, the first resistance unit includes at least two second resistances R2, the at least two second resistances are connected in parallel, and each of the at least two second resistances is connected in parallel between the live line and the neutral line.
In this embodiment, the second resistor is a chip resistor.
In the embodiment of the present application, the discharging module further includes a second resistance unit 106, the second resistance unit is connected in series with the first resistance unit, the first resistance unit is connected in parallel with the second resistance unit between the live wire and the zero line, the second resistance unit includes at least two third resistances R3, and the at least two third resistances are connected in parallel with each other. In the embodiment, in order to optimize the circuit structure and space, the chip resistors are adopted, but the power requirement of the rectifying and filtering circuit is considered, so that a scheme of multiple parallel strings is adopted, and the structural arrangement among the components is optimized under the condition of effective and safe discharge.
In the embodiment of the present application, the filtering module includes first electric capacity EC1, common mode inductance L1 and second electric capacity EC2, first electric capacity is parallelly connected the live wire with between the zero line, common mode inductance's first input with the one end of the module of discharging the one end electricity of first electric capacity is connected, common mode inductance's second input with the other end of the module of discharging the other end electricity of first electric capacity is connected, common mode inductance's first output with the first end of second electric capacity the first input electricity of rectifier module is connected, common mode inductance's second output with the second end of second electric capacity the second input electricity of rectifier module is connected.
In the embodiment of the present application, the rectification filter circuit further includes an anti-surge module 107, the anti-surge module is connected in parallel between the live wire and the zero line, and is used for absorbing the instantaneous overvoltage in the voltage signal output by the live wire. Specifically, the anti-surge module may include a varistor ZR1, the varistor ZR1 being connected in parallel directly between the live and neutral conductors.
In the embodiment of the present application, a FUSE1 is electrically connected between the live wire and the first resistance unit. The fuse can be fused to cut off the current when the current rises to a certain height and heat abnormally, and the safe operation of the circuit is protected. Specifically, the material of the fuse may be determined according to the setting range of the circuit power.
In this embodiment, the rectifying and filtering circuit may further include a thermistor NTC, one end of the thermistor is electrically connected to one end of the second capacitor EC2, and the other end of the thermistor is electrically connected to the first input end of the rectifying module, and the thermistor is used to perform overvoltage protection on the circuit.
In this embodiment, the rectifier module includes a rectifier bridge BR1, and a first output of the rectifier bridge corresponds to pin 1, a first input corresponds to pin 2, a second input corresponds to pin 3, and a second output corresponds to pin 4. The rectifying and filtering circuit can further comprise a third capacitor EC3 and a fourth capacitor EC4, wherein the third capacitor and the fourth capacitor are both connected in parallel between a live wire and a zero wire, one end of the fourth capacitor is respectively and electrically connected with a pin 1 of the rectifying bridge and one end of the third capacitor, the other end of the fourth capacitor is respectively and electrically connected with a pin 4 of the rectifying bridge and the other end of the third capacitor, and specifically, the third capacitor can be an electrolytic capacitor. Wherein the third capacitor is used for filtering the input voltage of the rectifier bridge.
In order to better implement the rectifying and filtering circuit in the embodiment of the present application, on the basis of the rectifying and filtering circuit, the embodiment of the present application further provides a control circuit, which includes the rectifying and filtering circuit.
The control circuit should adopt the above-mentioned rectifying and filtering circuit, and the specific structure of the rectifying and filtering circuit refers to the above-mentioned embodiments, and since the control circuit adopts all the technical solutions of all the above-mentioned embodiments, the control circuit at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and details are not repeated herein.
In order to better implement the control circuit in the embodiments of the present application, the present application further provides a household appliance including the control circuit. The household appliance can be an air conditioner, an induction cooker and other household appliances.
The household appliance adopts the control circuit, the specific structure of the control circuit refers to the above embodiments, and the household appliance adopts all the technical schemes of all the embodiments, so that the household appliance at least has all the beneficial effects brought by the technical schemes of the embodiments, and the details are not repeated herein.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The rectifying and filtering circuit, the control circuit and the household appliance provided by the embodiment of the present application are introduced in detail, a specific example is applied in the present application to explain the principle and the implementation manner of the present application, and the description of the above embodiment is only used to help understanding the method and the core idea of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (12)
1. A rectifying-filtering circuit, comprising:
a power input terminal for inputting a voltage;
the discharging module is electrically connected with the power supply input end;
the filtering module is electrically connected with the discharging module and is used for filtering the input voltage of the power supply input end;
the rectification module is electrically connected with the filtering module and is used for rectifying the input voltage output by the power supply input end;
the discharging module is used for consuming the voltage stored in the filtering module when the voltage input at the power supply input end is stopped.
2. The rectifying and filtering circuit according to claim 1, wherein the power input terminal comprises a live wire and a neutral wire, the discharging module is connected in parallel between the live wire and the neutral wire, and the discharging module comprises a first resistance unit connected in parallel between the live wire and the neutral wire.
3. The rectifying-filtering circuit according to claim 2, wherein said first resistance unit comprises a first resistor connected in parallel between said live line and said neutral line.
4. The rectifying-filtering circuit according to claim 3, wherein the first resistor is an oxide film resistor.
5. The rectifying-filtering circuit according to claim 2, wherein the first resistance unit comprises at least two second resistances, the at least two second resistances are connected in parallel with each other, and each of the at least two second resistances is connected in parallel between the live wire and the neutral wire.
6. The rectifying-filtering circuit according to claim 5, wherein the second resistor is a chip resistor.
7. The rectifying and filtering circuit according to claim 5, wherein the discharging module further comprises a second resistance unit, the second resistance unit is connected in series with the first resistance unit, the first resistance unit and the second resistance unit are connected in parallel between the live wire and the neutral wire, the second resistance unit comprises at least two third resistances, and the at least two third resistances are connected in parallel with each other.
8. The rectifying and filtering circuit according to claim 2, wherein the filtering module includes a first capacitor, a common mode inductor, and a second capacitor, the first capacitor is connected in parallel between the live wire and the neutral wire, a first input end of the common mode inductor is electrically connected to one end of the discharging module and one end of the first capacitor, a second input end of the common mode inductor is electrically connected to the other end of the discharging module and the other end of the first capacitor, a first output end of the common mode inductor is electrically connected to a first end of the second capacitor and a first input end of the rectifying module, and a second output end of the common mode inductor is electrically connected to a second end of the second capacitor and a second input end of the rectifying module.
9. The rectifying and filtering circuit according to claim 2, further comprising an anti-surge module connected in parallel between the live line and the neutral line for absorbing transient over-voltages in the voltage signal output from the live line.
10. The rectifying and filtering circuit according to claim 2, wherein a fuse is electrically connected between the live wire and the first resistance unit.
11. A control circuit comprising the rectifying-filtering circuit according to any one of claims 1 to 10.
12. A household appliance, characterized in that it comprises a control circuit according to claim 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121305000.4U CN215934742U (en) | 2021-06-10 | 2021-06-10 | Rectifying and filtering circuit, control circuit and household appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121305000.4U CN215934742U (en) | 2021-06-10 | 2021-06-10 | Rectifying and filtering circuit, control circuit and household appliance |
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| Publication Number | Publication Date |
|---|---|
| CN215934742U true CN215934742U (en) | 2022-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121305000.4U Active CN215934742U (en) | 2021-06-10 | 2021-06-10 | Rectifying and filtering circuit, control circuit and household appliance |
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| Country | Link |
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| CN (1) | CN215934742U (en) |
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- 2021-06-10 CN CN202121305000.4U patent/CN215934742U/en active Active
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