CN105305400A - Reverse connection protection circuit of power supply of power utilization equipment - Google Patents
Reverse connection protection circuit of power supply of power utilization equipment Download PDFInfo
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- CN105305400A CN105305400A CN201510772939.4A CN201510772939A CN105305400A CN 105305400 A CN105305400 A CN 105305400A CN 201510772939 A CN201510772939 A CN 201510772939A CN 105305400 A CN105305400 A CN 105305400A
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Abstract
The invention discloses a reverse connection protection circuit of a power supply of power utilization equipment. The reverse connection protection circuit comprises a first power supply connecting end P1, a second power supply connecting end P2 and a rectifier bridge circuit, wherein the first power supply connecting end P1 is connected between a negative pole of a first diode D1 and a positive pole of a second diode D2; the second power supply connecting end P2 is connected between a negative pole of a third diode D3 and a positive pole of a fourth diode D4; one end of a power supply circuit of the power utilization equipment is connected between a negative pole of the second diode D2 and a negative pole of the fourth diode D4; and the other end of the power supply circuit of the power utilization equipment is connected between a positive pole of the first diode D1 and a positive pole of the third diode D3. According to the reverse connection protection circuit, a power supply line of an alarm is allowed to be connected regardless of a positive pole or a negative pole; and no matter a positive pole of a power supply line of an adapter is connected with P1 and a negative pole of the power supply line of the adapter is connected with P2 or the negative pole of the power supply line of the adapter is connected with P1 and the positive pole of the power supply line of the adapter is connected with P2, a flow direction of current of a power supply circuit of the alarm is constant, and the power supply circuit can normally supply power for the alarm to allow the alarm to normally operate, so that damage of the alarm caused by reverse connection of the power supply line can be avoided.
Description
Technical field
The present invention relates to Fuel Gas Leak Alarm field, particularly relate to a kind of reverse-connection preventing circuit of power source of alarm.
Background technology
Fuel Gas Leak Alarm is very important gas safe equipment, and it is last pipe protection of safe handling combustion gas.Fuel Gas Leak Alarm is by the low-concentration combustible gas in gas sensor detection surrounding environment, pass through sample circuit, by detectable signal analog quantity or digital transfer to controller, when combustable gas concentration exceedes the value set in controller, controller sends alarm signal by actuator or performs the actions such as closing gas valve door.The acquisition sensor of flammable gas alarm mainly contains oxide semiconductor-type, catalytic combustion-type, hot wire type gas sensors, also has a small amount of other types, as chemical cell class sensor.These transducers are all by the absorption to fuel gas in surrounding environment, produce chemical reaction or electrochemical reaction, cause the change of the electric physical property of transducer at sensor surface.Fuel Gas Leak Alarm is widely used in the various fields such as city security protection, community, factory, company, school, family, villa, warehouse, resource, oil, chemical industry, gas transmission and distribution.
Household gas warner when mounted, pay special attention to the both positive and negative polarity of power line, once the reversal connection of power line both positive and negative polarity, by direct faiture alarm device after energising.And installer often needs to install continuously a large amount of alarm or continuous operation for a long time, occurs that power line connects instead by operate miss unavoidably.
Adapter and the main frame of a lot of fuel gas alarms occurred on the market are at present splits, need manually to be linked on the Wiring port of main frame by the power line of adapter, as shown in Figure 1 during use.But the Wiring port of existing product and power line do not provide clear and definite both positive and negative polarity mark, user or installation personnel are easy to the both positive and negative polarity of power line to connect instead when wiring.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of power consumption equipment circuit for preventing reverse connection of power supply is provided, allow power source of alarm line to access regardless of both positive and negative polarity, avoid because power line reversal connection causes alarm to damage.
The object of the invention is to be achieved through the following technical solutions: power consumption equipment circuit for preventing reverse connection of power supply, comprise the first power access end P1, second source incoming end P2 and rectifier circuit, rectifier circuit is by the first diode D1, second diode D2, 3rd diode D3 and the 4th diode D4 is formed, the negative pole of the first diode D1 is connected with the positive pole of the second diode D2, the negative pole of the second diode D2 is connected with the negative pole of the 4th diode D4, the positive pole of the 4th diode D4 is connected with the negative pole of the 3rd diode D3, the positive pole of the 3rd diode D3 is connected with the positive pole of the first diode D1, first power access end P1 is connected between the negative pole of the first diode D1 and the positive pole of the second diode D2, and second source incoming end P2 is connected between the negative pole of the 3rd diode D3 and the positive pole of the 4th diode D4, one end of power consumption equipment power circuit is connected between the negative pole of the second diode D2 and the negative pole of the 4th diode D4, and the other end of power consumption equipment power circuit is connected between the positive pole of the first diode D1 and the positive pole of the 3rd diode D3.
The first described diode D1, the second diode D2, the 3rd diode D3 and the 4th diode D4 all adopt 1N4007 diode.
Described power consumption equipment power circuit is fuel gas alarm power circuit.
Described power consumption equipment is fuel gas alarm, and fuel gas alarm comprises power supply adaptor and lower house, and one end of lower house is provided with Wiring port, and power supply adaptor is connected on Wiring port by power line.
The invention has the beneficial effects as follows: need in use manually the power line of adapter to be linked on the Wiring port of main frame for Split type gas alarm, and Wiring port and power line do not provide clear and definite both positive and negative polarity mark, user or installation personnel are easy to the both positive and negative polarity of power line to connect anti-problem when wiring, propose the design.The design allows power source of alarm line to access regardless of both positive and negative polarity, no matter be that adaptor power supplies line positive pole meets P1, negative pole meets P2, or negative pole meets P1, positive pole meets P2, the current direction of power source of alarm circuit is all constant, power circuit all can be alarm normal power supply, alarm is normally worked, the alarm caused because of power line reversal connection can be avoided to damage, safer, more reasonable, user uses more convenient.
Accompanying drawing explanation
Fig. 1 is Split type gas alarm arrangement schematic diagram;
Fig. 2 is electrical block diagram of the present invention;
Fig. 3 is equivalent circuit diagram of the present invention;
Fig. 4 is that P1 of the present invention connects positive pole, P2 connects negative pole schematic diagram;
Fig. 5 is that P1 of the present invention connects negative pole, P2 connects positive pole schematic diagram;
In figure, 1-power supply adaptor, 2-power line, 3-Wiring port, 4-lower house.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail, but protection scope of the present invention is not limited to the following stated.
As shown in Figure 1, power consumption equipment is fuel gas alarm, and fuel gas alarm comprises power supply adaptor 1 and lower house 4, and one end of lower house 4 is provided with Wiring port 3, and power supply adaptor 1 is connected on Wiring port 3 by power line 2.Need in use manually the power line 2 of power supply adaptor 1 to be linked on the Wiring port 3 of main frame, and Wiring port 3 and power line 2 do not provide clear and definite both positive and negative polarity mark, user or installation personnel are easy to the both positive and negative polarity of power line to connect instead when wiring.
As shown in Figure 2 and Figure 3, power consumption equipment circuit for preventing reverse connection of power supply, this power consumption equipment is fuel gas alarm, comprise the first power access end P1, second source incoming end P2 and rectifier circuit, rectifier circuit is made up of the first diode D1, the second diode D2, the 3rd diode D3 and the 4th diode D4, and the first described diode D1, the second diode D2, the 3rd diode D3 and the 4th diode D4 all adopt 1N4007 diode.The negative pole of the first diode D1 is connected with the positive pole of the second diode D2, the negative pole of the second diode D2 is connected with the negative pole of the 4th diode D4, the positive pole of the 4th diode D4 is connected with the negative pole of the 3rd diode D3, and the positive pole of the 3rd diode D3 is connected with the positive pole of the first diode D1; First power access end P1 is connected between the negative pole of the first diode D1 and the positive pole of the second diode D2, and second source incoming end P2 is connected between the negative pole of the 3rd diode D3 and the positive pole of the 4th diode D4; One end of fuel gas alarm power circuit is connected between the negative pole of the second diode D2 and the negative pole of the 4th diode D4, and the other end of fuel gas alarm power circuit is connected between the positive pole of the first diode D1 and the positive pole of the 3rd diode D3.
As shown in Figure 4, when P1 connect positive pole, P2 connect negative pole time, the electromotive force at P1 place is higher than VCC and earth terminal, but the second diode D2 can prevent current direction earth terminal, therefore electric current can only flow to VCC by the first diode D1 from P1, clockwise inflow alarm circuit, and flow to P2 by the 4th diode D4.
As shown in Figure 5, when P1 connect negative pole, P2 connect positive pole time, the electromotive force at P2 place is higher than VCC and earth terminal, but the 4th diode D4 can prevent current direction earth terminal, therefore electric current can only flow to VCC by the 3rd diode D3 from P2, clockwise inflow alarm circuit, and flow to P1 by the second diode D2.The same when current direction and the P1 of power source of alarm circuit connect positive pole, P2 connects negative pole, do not affect the normal work of alarm.
No matter be that power line positive pole meets P1, negative pole meets P2, or negative pole meets P1, positive pole meets P2, the current direction of power source of alarm circuit is all constant, and power circuit all can be alarm normal power supply, and alarm is normally worked.After the program effectively eliminates power line reversal connection, the hidden danger of alarm is burnt in energising.
The above is only the preferred embodiment of the present invention, be to be understood that the present invention is not limited to the form disclosed by this paper, should not regard the eliminating to other embodiments as, and can be used for other combinations various, amendment and environment, and can in contemplated scope described herein, changed by the technology of above-mentioned instruction or association area or knowledge.And the change that those skilled in the art carry out and change do not depart from the spirit and scope of the present invention, then all should in the protection range of claims of the present invention.
Claims (4)
1. power consumption equipment circuit for preventing reverse connection of power supply, it is characterized in that: comprise the first power access end P1, second source incoming end P2 and rectifier circuit, rectifier circuit is made up of the first diode D1, the second diode D2, the 3rd diode D3 and the 4th diode D4, the negative pole of the first diode D1 is connected with the positive pole of the second diode D2, the negative pole of the second diode D2 is connected with the negative pole of the 4th diode D4, the positive pole of the 4th diode D4 is connected with the negative pole of the 3rd diode D3, and the positive pole of the 3rd diode D3 is connected with the positive pole of the first diode D1; First power access end P1 is connected between the negative pole of the first diode D1 and the positive pole of the second diode D2, and second source incoming end P2 is connected between the negative pole of the 3rd diode D3 and the positive pole of the 4th diode D4; One end of power consumption equipment power circuit is connected between the negative pole of the second diode D2 and the negative pole of the 4th diode D4, and the other end of power consumption equipment power circuit is connected between the positive pole of the first diode D1 and the positive pole of the 3rd diode D3.
2. power consumption equipment circuit for preventing reverse connection of power supply according to claim 1, is characterized in that: the first described diode D1, the second diode D2, the 3rd diode D3 and the 4th diode D4 all adopt 1N4007 diode.
3. power consumption equipment circuit for preventing reverse connection of power supply according to claim 1, is characterized in that: described power consumption equipment power circuit is fuel gas alarm power circuit.
4. power consumption equipment circuit for preventing reverse connection of power supply according to claim 1, it is characterized in that: described power consumption equipment is fuel gas alarm, fuel gas alarm comprises power supply adaptor (1) and lower house (4), one end of lower house (4) is provided with Wiring port (3), and power supply adaptor (1) is connected on Wiring port (3) by power line (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510772939.4A CN105305400A (en) | 2015-11-13 | 2015-11-13 | Reverse connection protection circuit of power supply of power utilization equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510772939.4A CN105305400A (en) | 2015-11-13 | 2015-11-13 | Reverse connection protection circuit of power supply of power utilization equipment |
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| Publication Number | Publication Date |
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| CN105305400A true CN105305400A (en) | 2016-02-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510772939.4A Pending CN105305400A (en) | 2015-11-13 | 2015-11-13 | Reverse connection protection circuit of power supply of power utilization equipment |
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| Country | Link |
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| CN (1) | CN105305400A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109751743A (en) * | 2018-12-05 | 2019-05-14 | 珠海格力电器股份有限公司 | The full DC driven air-conditioner control system and air conditioner of reversed function are prevented with power supply |
| CN110794339A (en) * | 2019-10-09 | 2020-02-14 | 国网山东省电力公司东平县供电公司 | Centralized acousto-optic alarm power-off indicator, mechanism and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2133063Y (en) * | 1992-06-29 | 1993-05-12 | 赵安然 | Socket of same base, seperate wire plug |
| EP1978617A1 (en) * | 2007-04-02 | 2008-10-08 | Delphi Technologies, Inc. | Protection device |
| CN101964522A (en) * | 2010-04-19 | 2011-02-02 | 瑞声声学科技(深圳)有限公司 | Direct current positive and negative electrode anti-misconnection system and using method thereof |
| CN202930934U (en) * | 2012-09-29 | 2013-05-08 | 深圳市元正能源***有限公司 | Protective circuit |
| CN205160064U (en) * | 2015-11-13 | 2016-04-13 | 成都秦川科技发展有限公司 | Power consumption device power anti -reverse connection circuit |
-
2015
- 2015-11-13 CN CN201510772939.4A patent/CN105305400A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2133063Y (en) * | 1992-06-29 | 1993-05-12 | 赵安然 | Socket of same base, seperate wire plug |
| EP1978617A1 (en) * | 2007-04-02 | 2008-10-08 | Delphi Technologies, Inc. | Protection device |
| CN101964522A (en) * | 2010-04-19 | 2011-02-02 | 瑞声声学科技(深圳)有限公司 | Direct current positive and negative electrode anti-misconnection system and using method thereof |
| CN202930934U (en) * | 2012-09-29 | 2013-05-08 | 深圳市元正能源***有限公司 | Protective circuit |
| CN205160064U (en) * | 2015-11-13 | 2016-04-13 | 成都秦川科技发展有限公司 | Power consumption device power anti -reverse connection circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109751743A (en) * | 2018-12-05 | 2019-05-14 | 珠海格力电器股份有限公司 | The full DC driven air-conditioner control system and air conditioner of reversed function are prevented with power supply |
| CN110794339A (en) * | 2019-10-09 | 2020-02-14 | 国网山东省电力公司东平县供电公司 | Centralized acousto-optic alarm power-off indicator, mechanism and method |
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Address after: 610199 Longquanyi, Sichuan Province Industrial Park licensing Applicant after: Chengdu Qinchuan networking Polytron Technologies Inc Address before: 610199 Longquanyi, Sichuan Province Industrial Park licensing Applicant before: Chengdu Taichuan Technology Development Co., Ltd. |
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Application publication date: 20160203 |