CN212379540U - Security check instrument and strong current interphase short circuit detection circuit thereof - Google Patents
Security check instrument and strong current interphase short circuit detection circuit thereof Download PDFInfo
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- CN212379540U CN212379540U CN202020293873.7U CN202020293873U CN212379540U CN 212379540 U CN212379540 U CN 212379540U CN 202020293873 U CN202020293873 U CN 202020293873U CN 212379540 U CN212379540 U CN 212379540U
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Abstract
The utility model discloses a security check appearance and alternate short circuit detection circuitry of forceful electric power thereof. This alternate short circuit detection circuitry of forceful electric power includes power input end and controller, and power input end includes 2 at least live wires, and the controller includes the bottom plate, and the bottom plate is including connecting each corresponding pin of 2 at least live wire first ends respectively, and the power of different phases is connected respectively to 2 at least live wire second ends. The safety inspection instrument comprises the strong electric interphase short circuit detection circuit and at least 2 output ends. The safety detector and the strong current interphase short circuit detection circuit thereof have the advantages that the input power supply of the detection circuit is not input by a single power supply end, but at least 2 power supplies are input, and the result is that the input end has a voltage phase difference, the interphase voltage of the power supplies can be directly measured, and when the interphase short circuit occurs in the electronic components in the unit of the equipment to be detected, the interphase short circuit can be directly reflected on the interphase voltage, so that the phenomenon of fire striking and damage caused by the short circuit between the electronic components when the electronic components are electrified for running test after electrical safety test is avoided.
Description
Technical Field
The utility model relates to an electrical safety performance integrated test appearance especially relates to a security check appearance and alternate short circuit detection circuitry of forceful electric power thereof.
Background
The safety inspection instrument is an instrument for detecting the electrical safety performance of an electrical appliance such as an air conditioner in the production process of the electrical appliance such as the air conditioner. The basic principle of voltage measurement is that when a circuit normally works, the working voltage of each point in the circuit has a relatively stable normal value or dynamic change range, and if the circuit has open circuit fault, short circuit fault or element performance parameters change, the working voltage in the circuit can also change accordingly.
The working principle of the detection circuit of the existing safety detector is that a voltage higher than the normal working voltage is applied to an insulator of a tested device, and the voltage applied to the insulator can only generate small leakage current after a period of time, so that the insulation property is good. The detection circuit consists of a power supply control module, a signal acquisition and conditioning module and a computer control system.
At present, an input end is adopted to input a power supply into a detection circuit, corresponding voltage changes are made through a power supply control module, the power supply is divided into three power supply wires after passing through the power supply control module, each power supply wire still keeps the same voltage, namely, no voltage drop is generated, and therefore when a multimeter is used for measuring, the voltage basically shows zero or changes in a small range. When the detection circuit is used for measuring, the input voltage keeps the same phase and is respectively input into different parts inside the unit of the tested equipment, different voltage drops are generated by passing voltages due to different electronic components of all parts, and at the moment, if the electronic components are internally short-circuited, the strong voltage part can discharge the relatively weak voltage part, so that the electronic components are burnt.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a security check appearance and alternate short circuit detection circuitry of forceful electric power thereof adopts single power end input to change into and inputs 2 at least powers through the detection circuitry input power with current, has solved effectively because of the unable measuring problem of same phase voltage input unit test to the alternate short circuit of electronic components and the condition of electronic components scaling loss in the test procedure.
In order to solve the technical problem, the utility model adopts the following technical scheme:
on the one hand, the utility model provides an alternate short circuit detection circuitry of forceful electric power. The alternate short circuit detection circuitry of forceful electric power is applied to the security check appearance, alternate short circuit detection circuitry of forceful electric power includes power input end and controller, wherein, power input end includes ground wire, zero line and 2 at least live wires, the controller includes the bottom plate, wherein, the bottom plate is including connecting respectively each of 2 at least live wire first ends correspond the pin, the power of different phases is connected respectively to 2 at least live wire second ends.
Optionally, for the strong electric interphase short detection circuit, the at least 2 live wires are 3 live wires.
Optionally, the strong electric interphase short circuit detection circuit further includes a power control module, where the power control module includes corresponding switches respectively controlling each live wire of the at least 2 live wires.
Optionally, for the strong electric interphase short circuit detection circuit, the controller further includes a main board, and the main board includes a voltage stabilizing module and/or a boosting module.
Optionally, for the strong electric interphase short circuit detection circuit, when the motherboard includes a voltage stabilization module, the voltage stabilization module includes power supply terminals for respectively connecting the at least 2 live wires; when the mainboard comprises the boost module, the boost module comprises power ends respectively corresponding to the at least 2 live wires.
Optionally, for the strong electric interphase short circuit detection circuit, the second ends of the at least 2 live wires are connected to power supplies of different phases through the voltage stabilizing module and/or the voltage boosting module.
On the other hand, the utility model provides a security check appearance. The safety inspection instrument comprises the strong electric interphase short circuit detection circuit and at least 2 output ends.
Compared with the prior art, the utility model discloses the main advantage of technical scheme as follows:
the utility model discloses security check appearance and alternate short circuit detection circuitry of forceful electric power thereof, to no longer adopting single power end input in detection circuitry input power, but 2 at least powers of direct input, its result is exactly the phase difference that there is voltage in the input, can the alternate voltage of direct measurement power, can direct reflection when alternate short circuit appears in the inside electronic components of unit of equipment under test on alternate voltage, just so avoided behind the electrical safety test circular telegram to operate when testing because of the short circuit causes the damage phenomenon of striking sparks between electronic components. Compared with the traditional scheme of inputting the detection circuit power supply, the scheme of inputting the power supply effectively solves the problems that the phase-to-phase short circuit of the electronic components cannot be measured in the test of the same-phase voltage input unit and the electronic components are burnt in the test process. The economic benefit brought is that the economic loss caused by burning of electronic components in the testing process due to the fact that interphase short circuit cannot be measured is directly reduced.
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 circuit diagram of an exemplary conventional security device;
FIG. 2 is a schematic diagram of the structure of the detection circuit portion involved in the improvement of the security inspection apparatus shown in FIG. 1;
fig. 3 is a schematic structural diagram of a strong current interphase short circuit detection circuit provided in embodiment 1 of the present invention;
fig. 4 is a working principle diagram of the security inspection instrument of embodiment 2 of the present invention.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can 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 invention to those skilled in the art.
The strong electric interphase short circuit detection circuit provided in embodiment 1 is applied to a security check instrument. Fig. 1 is a schematic circuit diagram of an example of a conventional security device. Fig. 2 is a schematic structural diagram of a detection circuit part related to improvement in the security inspection instrument shown in fig. 1. Fig. 3 is a schematic structural diagram of a strong current interphase short circuit detection circuit provided in embodiment 1 of the present invention. As shown in fig. 1, 2, and 3, the strong electric interphase short-circuit detecting circuit of embodiment 1 includes a power supply input terminal and a controller. Wherein, the power input end comprises a ground wire, a zero wire and at least 2 live wires. The controller includes a backplane. The bottom plate is including connecting each corresponding pin of the first end of 2 at least live wires respectively, and the power of different phases is connected respectively to the second end of 2 at least live wires. The controller is a module for adjusting and modifying a series of actions of the security inspection instrument system.
The at least 2 fire lines may be 3 fire lines. If the power input end comprises 2 live wires, the strong-current interphase short circuit detection circuit can only be used for testing a two-phase motor set; if the power input end includes the live wire more than 3, then the alternate short circuit detection circuitry of forceful electric power can enough test two-phase motor group and can test three-phase motor group.
In this embodiment, the strong electric interphase short circuit detection circuit further includes a power control module, and the power control module includes corresponding switches for respectively controlling each of the at least 2 live wires, so that compared with the existing detection circuit, the improved detection circuit adds switches to the power control module. To the condition that power input end includes the live wire more than 3, can open three power during test three-phase generator system through the power of the live wire input more than 3 of on-off control, only open two powers during test two-phase generator system.
In this embodiment, the controller further comprises a motherboard. The mainboard comprises a voltage stabilizing module and/or a boosting module. When the mainboard includes voltage stabilizing module, voltage stabilizing module includes each corresponding power end that is used for connecting at least 2 live wires respectively. When the mainboard includes the boost module, the boost module includes each corresponding power end that is used for connecting at least 2 live wires respectively. And the second ends of at least 2 live wires are connected with power supplies of different phases after passing through the voltage stabilizing module and/or the voltage boosting module.
The following description will be made by taking an example in which the power input terminal includes 3 fire wires.
The embodiment improves the existing detection circuit at the input power end, the improved detection circuit adopts three power supplies with different phases input at the power end, thus, the output power supplies can keep different phases after a series of actions of the detection circuit, such as the boosting module and the voltage stabilizing module, if the short circuit problem occurs inside the detected unit, the short circuit problem can be directly reflected in the current loop of the whole detection circuit, for example, an electronic component collides with other electronic components, the leakage current in the test loop is increased, the total current is reduced, the return voltage is lower than a set value, and the security inspection instrument gives an alarm to stop the test, so that the problem of the interphase short circuit can be found and checked in advance, and the damage of the electronic component caused by the fault is avoided.
Therefore, the abnormal point is exposed when the line is changed, and the input end of the detection circuit is directly input by at least three groups of live wires, so that the problem that the phases of input power supplies of the existing detection circuit are the same is fundamentally solved. The three power supplies are connected with corresponding pins 220V-L on a bottom plate of the controller through three live wires, the controller outputs the three power supplies after respectively doing the same actions as before, and the difference is that the three power supplies have different phases. The power supplies with different phases pass through the boosting module and the voltage stabilizing module and then are input into the device to be tested, and the device to be tested is not shown in the figure. The safety inspection instrument comprises an output end A1, an output end A2, an output end A3, an output end A4, an output end A5 and an output end A6, wherein the output end is connected with a power supply end of a tested device such as an air conditioner, when short circuit occurs between electronic components in the tested device, voltage change is directly reflected on a detection circuit loop, the detection circuit stops detecting after alarming, and the phenomenon that the electronic components are burnt and damaged due to the fact that the detection circuit cannot measure the inter-phase short circuit during electrical safety detection and power on is conducted during operation test is avoided.
As shown in fig. 1, the input end of the power supply of the conventional security inspection instrument includes 1 live wire, 1 zero wire and 1 ground wire, and the input end directly enters the main board and then performs corresponding voltage stabilization and voltage boosting processes, so that the same power supply does not generate corresponding phase change after voltage stabilization and voltage boosting processes, and therefore, after passing through electronic components, if an internal short circuit occurs, a high-voltage circuit may discharge relatively to a low-voltage circuit, resulting in occurrence of burning loss. As shown in fig. 3, the embodiment of the utility model provides a to detection circuitry improvement back, the three power of direct access entering controller part has different phases after corresponding steady voltage and the operation of stepping up, if the inside short circuit of electronic components just can direct feedback on power return when carrying out withstand voltage test like this, has avoided follow-up power-on test to lead to burning loss electronic components's phenomenon because of the inside short circuit of electronic components can't be discerned in advance to the electrical safety tester.
The embodiment 2 of the utility model provides a security check appearance, this security check appearance include above-mentioned alternate short circuit detection circuitry of forceful electric power and 2 at least outputs.
Next, use power input end to include 3 live wires as an example to current security check appearance with the embodiment of the utility model provides a security check appearance after the improvement carries out contrast test and effect verification.
For example, when the existing security check instrument is used for carrying out security check on an air conditioner, a power supply end is used for inputting a detection circuit, the phase of input current is basically not different, and corresponding voltage drop cannot be formed. The result that brings is exactly that when the input current passes through the voltage boost module and the voltage stabilization module of the detection circuit and then enters the electronic components, different voltage drops can be generated respectively after the resistances of different electronic components are consumed, that is to say, the voltage difference of the input current is not large, but there is a large voltage drop after consumption, under the condition, if an interphase short circuit between the electronic components occurs, the high-voltage circuit can discharge the relatively low-voltage circuit, so that the electronic components are burnt out, and the electric control and the chip can be damaged.
Because the detection circuit power input end of the existing security check instrument adopts live wire input of the same power line, after passing through the boosting module and the voltage stabilizing module, the same live wire is still a unit which directly divides the live wire into three parts after being output from the detection circuit and then inputs the three parts into the tested equipment, and no voltage drop exists among the live wires. Therefore, when the multimeter is used for testing the voltage between all parts in the working process of the detection circuit, the voltage cannot be tested, namely, the lines are not electrified, but the voltage drop between the lines is low, but the voltage drop between the lines and the ground still keeps 220 volts, 380 volts, 500 volts or higher. However, if the voltage between each part all can normally show when using the universal meter to measure when operation test, contrast whole testing process discovery, both are different on the input mode of power end, the embodiment of the utility model provides a security check appearance after the improvement directly inputs three power when the operation test, the phase place between the three is different, alright come out with measuring the universal meter.
Fig. 4 is a working schematic diagram of the security inspection instrument provided in embodiment 2 of the present invention.
As shown in fig. 4, in step S410, the power terminals of the device under test are respectively connected to at least two output terminals of the security check apparatus provided in embodiment 2.
In step S420, a current loop of the detection circuit is measured to detect whether a short circuit occurs between electronic components inside the device under test.
As an optional implementation mode, when the short circuit between the electronic components inside the tested device is detected, the security check instrument gives an alarm.
As an optional implementation mode, the safety inspection instrument stops detecting after alarming.
The utility model discloses security check appearance and alternate short circuit detection circuitry of forceful electric power thereof, to no longer adopting single power end input in detection circuitry input power, but 2 at least powers of direct input, its result is exactly the phase difference that there is voltage in the input, can the alternate voltage of direct measurement power, can direct reflection when alternate short circuit appears in the inside electronic components of unit of equipment under test on alternate voltage, just so avoided behind the electrical safety test circular telegram to operate when testing because of the short circuit causes the damage phenomenon of striking sparks between electronic components. Compared with the traditional scheme of inputting the detection circuit power supply, the scheme of inputting the power supply effectively solves the problems that the phase-to-phase short circuit of the electronic components cannot be measured in the test of the same-phase voltage input unit and the electronic components are burnt in the test process. The economic benefit brought is that the economic loss caused by burning of electronic components in the testing process due to the fact that interphase short circuit cannot be measured is directly reduced.
The above mentioned embodiments are only examples of the present invention, and not intended to limit the scope of the claims of the present invention, and all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings of the present invention or directly or indirectly applied to other related technical fields are also included in the scope of the claims of the present invention.
Claims (7)
1. A strong current interphase short circuit detection circuit is applied to a security check instrument and is characterized by comprising a power supply input end and a controller, wherein,
the power input end includes ground wire, zero line and 2 at least live wires, the controller includes the bottom plate, wherein, the bottom plate is including connecting respectively each of 2 at least live wire first ends correspond the pin, the power of different phases is connected respectively to 2 at least live wire second ends.
2. The strong electrical interphase short-circuit detection circuit according to claim 1, wherein the at least 2 fire lines is 3 fire lines.
3. The strong electric interphase short-circuit detection circuit according to claim 1 or 2, further comprising a power control module including respective corresponding switches respectively controlling respective ones of the at least 2 live wires.
4. The strong electric interphase short-circuit detection circuit according to claim 1, wherein the controller further includes a main board including a voltage stabilization module and/or a voltage boosting module.
5. The strong electric interphase short-circuit detection circuit according to claim 4,
when the mainboard comprises a voltage stabilizing module, the voltage stabilizing module comprises power supply ends which are used for being respectively connected with the at least 2 live wires;
when the mainboard comprises the boost module, the boost module comprises power ends respectively corresponding to the at least 2 live wires.
6. The strong electric interphase short circuit detection circuit according to claim 5, wherein the second ends of the at least 2 live wires are connected to power supplies of different phases after passing through the voltage stabilizing module and/or the voltage boosting module.
7. A security check apparatus, comprising a strong electric interphase short-circuit detection circuit according to any one of claims 1 to 6 and at least 2 output terminals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020293873.7U CN212379540U (en) | 2020-03-11 | 2020-03-11 | Security check instrument and strong current interphase short circuit detection circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020293873.7U CN212379540U (en) | 2020-03-11 | 2020-03-11 | Security check instrument and strong current interphase short circuit detection circuit thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212379540U true CN212379540U (en) | 2021-01-19 |
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| CN202020293873.7U Active CN212379540U (en) | 2020-03-11 | 2020-03-11 | Security check instrument and strong current interphase short circuit detection circuit thereof |
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