CN202084742U

CN202084742U - Circuit device and electronic equipment

Info

Publication number: CN202084742U
Application number: CN2011200805695U
Authority: CN
Inventors: 赵修龙
Original assignee: Tottori Sanyo Electric Guangzhou Co Ltd
Current assignee: Tottori Sanyo Electric Guangzhou Co Ltd
Priority date: 2011-03-24
Filing date: 2011-03-24
Publication date: 2011-12-21
Anticipated expiration: 2021-03-24

Abstract

An embodiment of the utility model discloses a circuit device, which comprises an input socket and an output socket. The input socket comprises a live wire end L, a zero wire end N and a grounding end. A lightning protection loop is arranged between the end L and the grounding end, the end L, the grounding end and the end N are respectively connected with an electromagnetic interference stopping circuit, an overvoltage protecting circuit is arranged between the end L and the end N, and the input socket is connected with the output socket via the overvoltage protecting circuit. Correspondingly, the utility model further discloses electronic equipment, after the embodiment of the utility model is carried out, EMC (electro magnetic compatibility) of circuits is realized, requirements of low design cost for people, simple circuit and fine EMC of the electronic equipment are met, simultaneously the circuit device realizes over-voltage protection and lightning protection, functions of the circuit device are added, performances of the circuit device are improved, and the circuit device further can be applied to electronic equipment such as a fax machine or a sterilizer and the like.

Description

A kind of circuit arrangement and a kind of electronic equipment

Technical field

The utility model relates to electronic applications, relates in particular to a kind of circuit arrangement and a kind of electronic equipment.

Background technology

Electro Magnetic Compatibility (EMC, Electro Magnetic Compatibility) is meant that the operation that meets the requirements of equipment or system does not produce the ability of intolerable electromagnetic interference to any equipment in its environment in its electromagnetic environment.Therefore, EMC comprises the requirement of two aspects: be meant that on the one hand electronic equipment can not surpass certain limit value to the electromagnetic interference that the place environment produces in normal course of operation; Be meant that on the other hand electronic equipment has to a certain degree immunity to interference, i.e. electromagnetic susceptibility to the electromagnetic interference that exists in the environment of place.

Current, associated with each other and influence each other between the power equipment of various operations with electromagnetism conduction, electromagnetic induction and three kinds of modes of electromagnetic radiation, can cause interferences, influence and endanger the equipment of operation and personnel under certain conditions.

EMC mainly is research and the generation that solves interference, propagation, reception, inhibition mechanism and measures accordingly and measurement technology, and on this basis according to the most rational principle of Technological Economy, clear and definite regulation is made in the interference level, anti-interference level and the braking measure that produce, it all is compatible making the equipment that is in same electromagnetic environment, simultaneously again not any entity in this environment introduce unallowable electromagnetic distu.

The circuit how design cost is lower, circuit is simple, EMC is good is the hot issue that people study always.

The utility model content

The utility model embodiment technical problem to be solved is to provide a kind of circuit arrangement and a kind of electronic equipment, has realized the EMC of circuit, has satisfied the demand of the circuit arrangement that people's design cost is low, circuit is simple, EMC is good.

In order to solve the problems of the technologies described above, a kind of circuit arrangement that the utility model embodiment proposes comprises input socket and accessory power outlet, and described input socket comprises live wire L end, zero line N end and earth terminal, wherein

Be provided with the lightning protection loop between described L end and the described earth terminal;

Described L end, described earth terminal and described N end are connected with the electromagnetic interference block isolating circuit respectively; And

Be provided with overvoltage crowbar between described L end and the described N end; Described input socket is connected with described accessory power outlet by described overvoltage crowbar.

Wherein, described lightning protection loop is composed in series by first piezo-resistance and discharge tube.

Wherein, described electromagnetic interference block isolating circuit comprises first electric capacity, second electric capacity and the 3rd electric capacity, wherein

Described first electric capacity is connected with described earth terminal with described L end respectively;

Described second electric capacity is connected with described earth terminal with described N end respectively;

Described the 3rd electric capacity is connected with described N end with described L end respectively.

Wherein, described overvoltage crowbar is composed in series by first fuse, second piezo-resistance and second fuse successively; Wherein

Described first fuse is connected with described accessory power outlet with described L end respectively;

Described second fuse is connected with described accessory power outlet with described N end respectively.

Wherein, be provided with at least one input port between the L of described input socket end and the earth terminal.

Wherein, be provided with at least one input port between the N of described input socket end and the earth terminal.

Correspondingly, the invention also discloses a kind of electronic equipment, comprise running control circuit and above-mentioned circuit arrangement, the accessory power outlet of described circuit arrangement is connected with described running control circuit.

Wherein, described electronic equipment comprises facsimile machine or sterilizer.

Implement the utility model embodiment, have following beneficial effect:

By between the L of input socket end and earth terminal, being provided with the lightning protection loop; at the L of input socket end; earth terminal and N end are connected with the electromagnetic interference block isolating circuit respectively; and between the L of input socket end and described N end, be provided with overvoltage crowbar; realized the EMC of circuit; it is low to have satisfied people's design cost; circuit is simple; the demand of the circuit arrangement that EMC is good; that has also realized circuit arrangement simultaneously has overvoltage protection and an anti-lightning strike protection; increased the function of circuit arrangement; promoted the performance of circuit arrangement, this circuit arrangement can also be applied on the electronic equipments such as facsimile machine or sterilizer.

Description of drawings

In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the structured flowchart schematic diagram of the circuit arrangement of the utility model embodiment;

Fig. 2 is the electrical block diagram of the circuit arrangement of the utility model embodiment;

Fig. 3 is the structured flowchart schematic diagram of the electronic equipment of the utility model embodiment.

Embodiment

Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.

The structured flowchart schematic diagram of the circuit arrangement of the utility model embodiment as shown in Figure 1, circuit arrangement 1 comprise input socket 11 and accessory power outlet 12, and input socket 11 comprises live wire L end 111, zero line N end 112 and earth terminal 113, wherein

Be provided with lightning protection loop 13 between L end 111 and the earth terminal 113;

L end 111, earth terminal 113 and N end divide 112 not to be connected with electromagnetic interference block isolating circuit 14; And be provided with overvoltage crowbar 15 between L end 111 and the N end 112; Input socket 11 is connected with accessory power outlet 12 by overvoltage crowbar 15.

Further, the electrical block diagram of the circuit arrangement of the utility model embodiment as shown in Figure 2, the structure of each circuit function module of detailed description circuit arrangement 1, particularly:

Lightning protection loop 13 in the circuit arrangement 1 can be composed in series by first piezo-resistance 131 and discharge tube 132; The concrete model of first piezo-resistance 131 includes but not limited to 911D10A, and the concrete model of discharge tube 132 includes but not limited to DA38-302MB; First piezo-resistance 131 can be avoided the misoperation of discharge tube 132 and when discharge tube 132 actions, protect front stage circuits, and when electrical network was subjected to being struck by lightning, discharge tube 132 can consume the energy of thunderbolt in the moment reaction, the protection late-class circuit;

Electromagnetic interference block isolating circuit 14 in the circuit arrangement 1 can comprise first electric capacity 141, second electric capacity 142 and the 3rd electric capacity 143, wherein

First electric capacity 141 is connected with earth terminal 113 with L end 111 respectively;

Second electric capacity 142 is connected with earth terminal 113 with N end 112 respectively;

The 3rd electric capacity 143 is connected with N end 112 with L end 111 respectively;

First electric capacity 141 and second electric capacity 142 can be Y electric capacity, and this capacitance can include but not limited to 3300PF; The 3rd electric capacity 143 can be X electric capacity, and this capacitance can include but not limited to 2.2UF; The 3rd electric capacity 143 is generally selected metallic film electric capacity for use; Because X, Y electric capacity all are safety electric capacity, after capacitor lost efficacy, can not cause clicking, do not jeopardize personal safety; Based on the restriction of leakage current, first electric capacity 141 and second electric capacity 142 can not be too big, are generally the nF level; The 3rd electric capacity 143 is generally the uF level; The 3rd electric capacity 143 suppresses differential mode interference, and first electric capacity 141 and second electric capacity 142 suppress common mode disturbances;

Overvoltage crowbar 15 in the circuit arrangement 1 can be composed in series by first fuse 151, second piezo-resistance 152 and second fuse 153 successively, wherein

First fuse 151 is connected with accessory power outlet 12 with L end 111 respectively;

Second fuse 153 is connected with accessory power outlet 12 with N end 112 respectively;

That is, the two ends of second piezo-resistance 152 also connect accessory power outlet 12 simultaneously;

It is withstand voltage that first fuse 151 and second fuse 153 are specifically as follows 250V, the fuse of 5A rated current, and its model includes but not limited to HT5AN5; The concrete model of second piezo-resistance 152 includes but not limited to 10D471.

Again further, can be provided with at least one input port between the L end 111 of input socket 11 and the earth terminal 113, can be provided with at least one input port between the N of input socket 11 end 112 and the earth terminal 113, to guarantee that input has enough creepage distances and along the face gap; Can be provided with an input port between L end 111 and earth terminal 113, can be provided with an input port between N end 112 and the earth terminal 113 is example among Fig. 2; Input socket 11 can be connected with AC power 220V, and accessory power outlet 12 can be connected with the running control circuit of concrete electronic equipment; The model of input socket 11 can be B5P-VH-1, and the model of accessory power outlet 12 can be B06B-XASK-1-A.

Need to prove that the input socket 11 of the utility model embodiment and accessory power outlet 12 include but not limited to the structure that shows among Fig. 2, those skilled in the art as can be known, input socket 11 and accessory power outlet 12 can design according to concrete circuit requirements.

Correspondingly, the invention also discloses a kind of electronic equipment, the structured flowchart schematic diagram of the electronic equipment of the utility model embodiment as shown in Figure 3, electronic equipment 3 comprises circuit arrangement 1 and the running control circuit 31 in the foregoing description, and the accessory power outlet of circuit arrangement 1 is connected with running control circuit 31.

Further, the electronic equipment 3 among the utility model embodiment includes but not limited to facsimile machine or sterilizer or the like, that is, the circuit arrangement 1 of the utility model embodiment can be applied on the electronic equipments such as facsimile machine or sterilizer.

In sum; by between the L of input socket end and earth terminal, being provided with the lightning protection loop; at the L of input socket end; earth terminal and N end are connected with the electromagnetic interference block isolating circuit respectively; and between the L of input socket end and described N end, be provided with overvoltage crowbar; realized the EMC of circuit; it is low to have satisfied people's design cost; circuit is simple; the demand of the circuit arrangement that EMC is good; that has also realized circuit arrangement simultaneously has overvoltage protection and an anti-lightning strike protection; increased the function of circuit arrangement; promoted the performance of circuit arrangement, this circuit arrangement can also be applied on the electronic equipments such as facsimile machine or sterilizer.

Above disclosed only is preferred embodiment among the utility model embodiment, can not limit the interest field of the utility model certainly with this, and therefore the equivalent variations of being done according to the utility model claim still belongs to the scope that the utility model is contained.

Claims

1. a circuit arrangement comprises input socket and accessory power outlet, it is characterized in that, described input socket comprises live wire L end, zero line N end and earth terminal, wherein

2. circuit arrangement as claimed in claim 1 is characterized in that, described lightning protection loop is composed in series by first piezo-resistance and discharge tube.

3. circuit arrangement as claimed in claim 1 is characterized in that, described electromagnetic interference block isolating circuit comprises first electric capacity, second electric capacity and the 3rd electric capacity, wherein

4. circuit arrangement as claimed in claim 1 is characterized in that, described overvoltage crowbar is composed in series by first fuse, second piezo-resistance and second fuse successively; Wherein

5. circuit arrangement as claimed in claim 1 is characterized in that, is provided with at least one input port between the L end of described input socket and the earth terminal.

6. circuit arrangement as claimed in claim 1 is characterized in that, is provided with at least one input port between the N end of described input socket and the earth terminal.

7. an electronic equipment is characterized in that, comprises running control circuit and as each described circuit arrangement of claim 1-6, the accessory power outlet of described circuit arrangement is connected with described running control circuit.

8. electronic equipment as claimed in claim 7 is characterized in that described electronic equipment comprises facsimile machine or sterilizer.