阅读说明：本技术 交流电并线的装置 (Alternating current doubling device ) 是由 郭瑞 吴强华 何皇芝 于 2019-11-11 设计创作，主要内容包括：本申请公开了一种交流电并线的装置。该申请的装置包括主插头,用于插入第一插座,接收第一插座的第一输出电流；从插头,用于插入第二插座,接收第二插座的第二输出电流；并线控制模块,用于将第一输出电流和第二输出电流并联后输出并联电流给连接器；所述连接器,用于将所述并联电流输出给负载。本申请解决现有的为了满足较大电流的设备的供电需求时,造成时间和资源浪费的问题。(The application discloses device of alternating current doubling. The device of the application comprises a main plug, a first switch and a second switch, wherein the main plug is used for being plugged into a first socket and receiving first output current of the first socket; the slave plug is used for being plugged into the second socket and receiving the second output current of the second socket; the parallel control module is used for outputting parallel current to the connector after the first output current and the second output current are connected in parallel; the connector is used for outputting the parallel current to a load. The problem of current in order to satisfy the power supply demand of the equipment of great electric current, cause time and wasting of resources is solved to this application.)

1. An apparatus for AC doubling, the apparatus comprising:

the main plug is used for being inserted into the first socket and receiving the first output current of the first socket;

the slave plug is used for being plugged into the second socket and receiving the second output current of the second socket;

the parallel control module is used for outputting parallel current to the connector after the first output current and the second output current are connected in parallel;

the connector is used for outputting the parallel current to a load.

2. The ac current doubling apparatus according to claim 1, wherein the doubling control module comprises:

the phase line detection unit is used for detecting phase lines of the main plug and the slave plug;

a current detection unit for detecting the first output current and the second output current;

the position detection unit is used for detecting the positions of the zero line and the live line corresponding to the main plug and the auxiliary plug respectively;

the first parallel unit is used for outputting parallel current to the connector after connecting a first output current and a second output current corresponding to the master plug and the slave plug in parallel;

the main control unit is used for acquiring phase line detection signals detected by the phase line detection unit and judging whether the phase lines of the main plug and the slave plug are the same or not according to the phase line detection signals; if the first output current and the second output current are the same, acquiring the first output current and the second output current detected by the current detection unit; if the first output current and the second output current are not zero, starting a position detection unit to respectively detect the positions of a zero line and a live line corresponding to the main plug and the auxiliary plug respectively; and after the positions of the zero line and the live line of the master plug and the slave plug are determined, controlling the first parallel unit to execute according to the determined positions.

3. The alternating current power combining device according to claim 2, wherein the phase line detection unit comprises photoelectric coupling chips for detecting the phase lines of the corresponding live lines of the master plug and the slave plug, and each plug is connected with one photoelectric coupling chip.

4. The ac power paralleling apparatus according to claim 2, wherein the current detecting unit includes a current transformer for detecting the first output current and the second output current of the master plug and the slave plug, respectively.

5. The ac power paralleling apparatus according to claim 2, wherein the position detecting unit includes a first relay, a second relay, a third relay, a fourth relay, a fifth relay, a sixth relay, a direction detecting circuit:

the first relay and the second relay are respectively connected with the main plug and a fifth relay, and the fifth relay is connected with the connector;

the third relay and the fourth relay are respectively connected with the main plug and a sixth relay, and the sixth relay is connected with the connector;

the first relay, the second relay, the third relay and the fourth relay receive switching signals sent by the main control unit for switching, so that zero lines of the main plug and the slave plug are connected with a zero line, and a live line is connected with a live line;

and the fifth relay and the sixth relay receive a closing signal sent by the main control unit to close, so that the first output current and the second output current respectively corresponding to the main plug and the slave plug are connected in parallel and then output parallel currents to the connector.

6. The ac current doubling apparatus according to claim 1, wherein the doubling control module comprises:

the multi-path signal detection unit is used for detecting multi-path electric signals output by the live wire and the zero line corresponding to the main plug and the auxiliary plug through a detection circuit comprising photoelectric coupling;

the second doubling unit is used for outputting parallel current to the connector after connecting the first output current and the second output current corresponding to the main plug and the auxiliary plug in parallel;

the micro control unit is used for acquiring the multi-path electric signals detected by the multi-path signal detection unit, and judging whether phase lines of the main plug and the slave plug are the same, whether the first output current and the second output current are zero, and whether positions of zero lines and live wires of the main plug and the slave plug are the same according to the multi-path electric signals; and if the phase lines of the main plug and the slave plug are the same, the first output current and the second output current cannot be zero, and the positions of the zero line and the live line of the main plug and the slave plug are correspondingly the same, controlling the second parallel unit to execute.

7. The ac power combining apparatus according to claim 6, wherein the multi-path signal detecting unit comprises four signal detecting circuits, each of which comprises a photoelectric coupling circuit, the first signal detecting circuit is connected to the zero line of the master plug and the zero line of the slave plug; the second path of signal detection circuit is connected with a zero line of the main plug and a live line of the slave plug; the third signal detection circuit is connected with the live wire of the master plug and the zero wire of the slave plug; the first path of signal detection circuit is connected with the live wire of the main plug and the live wire of the slave plug.

8. The alternating current power combining apparatus according to claim 6, wherein the second combining unit includes a seventh relay, an eighth relay, a ninth relay;

the seventh relay is respectively connected with the main plug and the connector;

the eighth relay and the ninth relay are respectively connected with the slave plug and the connector;

the seventh relay, the eighth relay and the ninth relay receive switching signals sent by the micro control unit for switching, so that first output current and second output current corresponding to the master plug and the slave plug are connected in parallel respectively and then parallel current is output to the connector.

9. The apparatus for AC doubling according to claim 6, further comprising a temperature detection unit;

the temperature detection unit is used for detecting the temperatures of the main plug and the slave plug, so that the micro control unit collects the temperatures of the main plug and the slave plug through the temperature detection unit, and the wire combination is prevented under the condition that the temperature exceeds the preset temperature.

10. The apparatus for ac power combining of claim 1, further comprising a current conversion module:

and the current conversion module is used for performing alternating current/direct current AC/DC conversion on the current acquired by the main plug and then supplying power to all units in the parallel control module.

Technical Field

The application relates to the technical field of circuits, in particular to an alternating current doubling device.

Background

When the alternating current is used daily, if a large power demand exists, the current output interface has an upper power limit. For example: the power supply socket for household electricity except for the air conditioner does not exceed 10A current output, however, when some equipment (such as the charging pile 16A) needs larger current, the 10A socket cannot be provided. When the required current cannot be supplied, the power distribution facility needs to be rebuilt, and waste of time and resources is caused.

Disclosure of Invention

The main object of this application is to provide a device of alternating current doubling to when solving current power supply demand for satisfying the equipment of great electric current, cause the extravagant problem of time and resource.

In order to achieve the above object, according to a first aspect of the present application, there is provided an apparatus for merging alternating currents.

The device for combining alternating current comprises:

the main plug is used for being inserted into the first socket and receiving the first output current of the first socket;

the slave plug is used for being plugged into the second socket and receiving the second output current of the second socket;

the parallel control module is used for outputting parallel current to the connector after the first output current and the second output current are connected in parallel;

the connector is used for outputting the parallel current to a load.

Further, the doubling control module includes:

the phase line detection unit is used for detecting phase lines of the main plug and the slave plug;

a current detection unit for detecting the first output current and the second output current;

the position detection unit is used for detecting the positions of the zero line and the live line corresponding to the main plug and the auxiliary plug respectively;

the first parallel unit is used for outputting parallel current to the connector after connecting a first output current and a second output current corresponding to the master plug and the slave plug in parallel;

the main control unit is used for acquiring phase line detection signals detected by the phase line detection unit and judging whether the phase lines of the main plug and the slave plug are the same or not according to the phase line detection signals; if the first output current and the second output current are the same, acquiring the first output current and the second output current detected by the current detection unit; if the first output current and the second output current are not zero, starting a position detection unit to respectively detect the positions of a zero line and a live line corresponding to the main plug and the auxiliary plug respectively; and after the positions of the zero line and the live line of the master plug and the slave plug are determined, controlling the first parallel unit to execute according to the determined positions.

Furthermore, the phase line detection unit comprises photoelectric coupling chips for detecting the phase lines of the live wires corresponding to the main plug and the slave plug, and each plug is connected with one photoelectric coupling chip.

Further, the current detection unit includes a current transformer for detecting a first output current and a second output current corresponding to the master plug and the slave plug.

Further, the position detection unit includes a first relay, a second relay, a third relay, a fourth relay, a fifth relay, a sixth relay, and a direction detection circuit:

the first relay and the second relay are respectively connected with the main plug and a fifth relay, and the fifth relay is connected with the connector;

the third relay and the fourth relay are respectively connected with the main plug and a sixth relay, and the sixth relay is connected with the connector;

the first relay, the second relay, the third relay and the fourth relay receive switching signals sent by the main control unit for switching, so that zero lines of the main plug and the slave plug are connected with a zero line, and a live line is connected with a live line;

and the fifth relay and the sixth relay receive a closing signal sent by the main control unit to close, so that the first output current and the second output current respectively corresponding to the main plug and the slave plug are connected in parallel and then output parallel currents to the connector.

Further, the doubling control module includes:

the multi-path signal detection unit is used for detecting multi-path electric signals output by the live wire and the zero line corresponding to the main plug and the auxiliary plug through a detection circuit comprising photoelectric coupling;

the second doubling unit is used for outputting parallel current to the connector after connecting the first output current and the second output current corresponding to the main plug and the auxiliary plug in parallel;

the micro control unit is used for acquiring the multi-path electric signals detected by the multi-path signal detection unit, and judging whether phase lines of the main plug and the slave plug are the same, whether the first output current and the second output current are zero, and whether positions of zero lines and live wires of the main plug and the slave plug are the same according to the multi-path electric signals; and if the phase lines of the main plug and the slave plug are the same, the first output current and the second output current cannot be zero, and the positions of the zero line and the live line of the main plug and the slave plug are correspondingly the same, controlling the second parallel unit to execute.

Furthermore, the multi-path signal detection unit comprises four paths of signal detection circuits, each path of signal detection circuit comprises a photoelectric coupling circuit, and the first path of signal detection circuit is connected with the zero line of the main plug and the zero line of the auxiliary plug; the second path of signal detection circuit is connected with a zero line of the main plug and a live line of the slave plug; the third signal detection circuit is connected with the live wire of the master plug and the zero wire of the slave plug; the first path of signal detection circuit is connected with the live wire of the main plug and the live wire of the slave plug.

Further, the second parallel unit comprises a seventh relay, an eighth relay and a ninth relay;

the seventh relay is respectively connected with the main plug and the connector;

the eighth relay and the ninth relay are respectively connected with the slave plug and the connector;

the seventh relay, the eighth relay and the ninth relay receive switching signals sent by the micro control unit for switching, so that first output current and second output current corresponding to the master plug and the slave plug are connected in parallel respectively and then parallel current is output to the connector.

Further, the device also comprises a temperature detection unit;

the temperature detection unit is used for detecting the temperatures of the main plug and the slave plug, so that the micro control unit collects the temperatures of the main plug and the slave plug through the temperature detection unit, and the wire combination is prevented under the condition that the temperature exceeds the preset temperature.

Further, the apparatus further comprises a current conversion module:

and the current conversion module is used for performing alternating current/direct current AC/DC conversion on the current acquired by the main plug and then supplying power to all units in the parallel control module.

In the embodiment of the application, in the alternating current parallel connection device, the main plug and the slave plug respectively receive the multiple paths of output currents of the sockets, then the parallel control module connects the multiple paths of output currents in parallel to obtain a larger current larger than each path of output current, and then the parallel currents obtained through parallel connection are output through the connector (output socket), so that a load obtains the larger current through the connector, and the working requirement of the load is met. It can be seen that the device for combining alternating current does not need to reform the power distribution device again, so that the waste of time and resources can be effectively avoided.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, serve to provide a further understanding of the application and to enable other features, objects, and advantages of the application to be more apparent. The drawings and their description illustrate the embodiments of the invention and do not limit it. In the drawings:

fig. 1 is a block diagram of an apparatus for combining ac power according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of an ac power combining apparatus according to an embodiment of the present application;

FIG. 3 is a block diagram of a combining control module according to an embodiment of the present disclosure;

fig. 4 is a circuit diagram of a phase line detection unit and a current detection unit provided according to an embodiment of the present application;

fig. 5 is a circuit diagram of a position detection circuit corresponding to a position detection unit and a first parallel unit provided in an embodiment of the present application;

FIG. 6 is a block diagram of another configuration of a doubling control module according to an embodiment of the present application;

FIG. 7 is a circuit diagram of another parallel control module according to an embodiment of the present disclosure;

fig. 8 is a flowchart corresponding to an operating principle of an ac doubling device according to an embodiment of the present application.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, 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 partial embodiments of the present application, but not all 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.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

According to an embodiment of the present application, there is provided an ac power combining apparatus, as shown in fig. 1 and 2 (where a is a front view, b is a side view, and c is a rear view of ac power combining), the apparatus including:

a main plug 1 for being inserted into the first outlet J1 and receiving a first output current of the first outlet J1;

receiving a second output current of the second outlet J2 from the plug 2 for insertion into the second outlet J2;

the parallel control module 3 is used for connecting the first output current and the second output current in parallel and then outputting the parallel current to a connector J4;

and a connector J4 for outputting the parallel current to the load.

Connector J4 is a device, such as a socket, that outputs current and allows a load to draw current through it. The slave plug 2 in fig. 1 may be one or more plugs. The number of slave plugs 2 may be selected according to the magnitude of the current required by the load, the greater the current required, the greater the number of slave plugs 2. Specifically, the magnitude of the parallel current after the parallel connection can be displayed by the display device, and then the number of the slave plugs 2 can be adjusted according to the displayed magnitude of the variable current. In the case where the output currents of the master plug 1 and the slave plug 2 are fixed values, the correspondence between the rated values of the parallel currents and the data of the slave plug 2 can be given for the user to refer to.

The alternating current doubling device in the embodiment can realize the effect of increasing the output current through the mutual matching of the main plug 1, the auxiliary plug 2, the connector J4 and the doubling control module 3, and has a simple structure. In addition, the device of alternating current doubling in this embodiment need not reform transform original distribution facility, just can realize the demand to the load power supply that needs more electric current, saves time and resources again.

Further, as a further supplement and refinement to the embodiment in fig. 1 described above, as shown in fig. 3, the doubling control module 3 includes:

a phase line detection unit 31 for detecting phase lines of the master plug 1 and the slave plug 2;

a current detection unit 32 for detecting the first output current and the second output current;

the position detection unit 33 is used for detecting the positions of the zero line and the live line corresponding to the master plug 1 and the slave plug 2 respectively;

in this embodiment, the positions of the neutral wire and the live wire refer to positions of jacks of the socket corresponding to the plug, that is, positions of the jacks corresponding to the neutral wire and positions of the jacks corresponding to the live wire. If the position of the jack corresponding to the zero line is left, the position of the zero line corresponding to the plug is left; and if the position of the jack corresponding to the live wire is right, the position of the live wire corresponding to the plug is right.

A first parallel unit 34, configured to output a parallel current to a connector J4 after connecting a first output current and a second output current corresponding to the master plug 1 and the slave plug 2 in parallel;

the main control unit 35 is configured to collect phase line detection signals detected by the phase line detection unit 31, and determine whether the phase lines of the master plug 1 and the slave plug 2 are the same according to the phase line detection signals; if the first output current and the second output current are the same, the first output current and the second output current detected by the current detection unit 32 are collected; if the first output current and the second output current are not zero, the position detection unit 33 is started to respectively detect the positions of the zero line and the live line corresponding to the master plug 1 and the slave plug 2; after the positions of the neutral wire and the live wire of the master plug 1 and the slave plug 2 are determined, the first parallel unit 34 is controlled to execute according to the determined positions, so that the first parallel unit 34 outputs parallel current to the connector J4 after connecting the first output current and the second output current corresponding to the master plug 1 and the slave plug 2 in parallel.

It should be noted that if the phase lines of the main plug 1 and the slave plug 2 are judged to be different according to the phase line detection signal, the parallel connection is exited and the prompt information (the parallel connection cannot be performed if the phase lines are different; and the like) is output through the display device. If the first output current and the second output current detected by the current detection unit 32 are collected, it is determined that one of the first output current and the second output current is zero (i.e. an open circuit condition occurs), the first output current and the second output current cannot be doubled, and prompt information (plug open circuit cannot be doubled; and the like) is output through the display device. In addition, if the main plug 1 or the slave plug 2 is suddenly unplugged from the corresponding socket during the parallel output process, the main control unit 35 will instantly cut off the output to ensure that the unplugged plug is not charged. The above-mentioned disconnection case includes that the master plug 1 is not inserted into the first outlet J1 and/or that the slave plug 2 is not inserted into the second outlet J2; or a disconnection fault of the line between the main plug 1 or the sub-plug 2 and the connector J4.

Further, as shown in fig. 4, a circuit diagram corresponding to the phase line detection unit 31 and the current detection unit 32 is provided.

In fig. 4, the circuit on the left side of the master plug 1 and the circuit on the left side of the slave plug 2 are phase line detection circuits; the circuit on the right side of the master plug 1 and the circuit on the right side of the slave plug 2 are current detection circuits. The phase line detection circuit detects through photoelectric coupling chips U3 and U4, and the specific photoelectric coupling chip in FIG. 4 is K1010 CXSM. The current detection circuit is detected by the mutual inductors CT1 and CT 2. In addition, TESTA _ ZERO and TESTB _ ZERO in fig. 4 are collection points at which the main control unit 35 collects signals through the phase line detection circuit to perform phase line determination.

Further, as shown in fig. 5, there is provided a circuit diagram of a position detection circuit corresponding to the position detection unit 33 and the first wiring unit 34.

In fig. 5, a first relay RL1 and a second relay RL2 are connected to the main plug 1 and a fifth relay RL5, respectively, and a fifth relay RL5 is connected to the connector J4;

the third relay RL3 and the fourth relay RL4 are connected with the main plug 1 and the sixth relay RL6, respectively, and the sixth relay RL6 is connected with the connector J4;

the first relay RL1, the second relay RL2, the third relay RL3 and the fourth relay RL4 receive switching signals sent by the main control unit 35 for switching, so that zero lines of the main plug 1 and the auxiliary plug 2 are connected with a zero line, and a live line is connected with a live line;

the fifth relay RL5 and the sixth relay RL6 receive the closing signal sent by the main control unit 35 to close, so that the first output current and the second output current corresponding to the master plug 1 and the slave plug 2 are connected in parallel, and then parallel current is output to the connector J4.

The circuit part composed of RL5 and RL6, diode D8, transistor Q5, resistor R42 and R36 is a circuit diagram corresponding to the first parallel unit 34. The portion of fig. 5 other than the circuit diagram corresponding to the first line-dividing unit 34 belongs to the circuit diagram corresponding to the position detecting unit 33.

The operating principle of the circuit diagram in fig. 5 is described below: the main plug 1 and the live wire L and the zero line N position of the slave plug 2 are detected in sequence, the RL1 relay is closed firstly, and the main control unit 35 judges which of the ends of the main plug 1 is the zero line and which is the live wire through the collected N _ GND and L _ GND signals. When the left side of the main plug 1 is detected to be a zero line N and the right side is detected to be a live line L, the RL1 is attracted; and when the left side of the main plug 1 is detected to be the live wire L and the right side is detected to be the zero wire N, the RL2 is attracted, and the RL1 is disconnected after the detection is finished. Similarly, the pair of terminals of the plug 2, i.e., the live wire L and the zero line N, are detected, the RL3 relay is closed, and the main control unit 35 determines which terminal of the plug 2 is the zero line and which terminal is the live wire through the N _ GND signal and the L _ GND signal. When the left side of the plug 2 is detected to be a zero line N and the right side is detected to be a live line L, the middle pull RL3 is output; when the left side of the plug 2 is detected to be a live wire L and the right side is detected to be a zero wire N, the RL4 is attracted in the output process; after the detection is finished, RL3 is disconnected. After the positions of the live wire L and the zero wire N of the phase line and the two plugs are determined, the relays RL5 and RL6 are switched on, namely the first output current and the second output current are connected in parallel, and then the parallel current is output to the connector J4, so that the parallel current is output to supply power to a load, namely the first socket J1 and the second socket J2 provide current for the load together. When the parallel currents are unbalanced, relays RL5 and RL6 need to be turned off at the same time.

In the above fig. 4 and 5, the current transformer is adopted to collect current to judge whether the plug is pulled out (whether the first output current and the second output current are zero), the live wire and the zero line are judged by adopting the voltage value of the live wire and the zero line to the ground, and then the relays are switched, so that at least 6 relays are needed, and the number of the relays is large. The detection time is relatively long. In order to reduce the detection time and the cost, the present embodiment further provides another structure diagram of the parallel control module 3, as shown in fig. 6.

The parallel control module 3 includes:

the multi-path signal detection unit 36 is used for detecting multi-path electric signals output by the live wire and the zero wire corresponding to the main plug 1 and the auxiliary plug 2 through a detection circuit comprising photoelectric coupling;

the second parallel unit 37 is configured to output a parallel current to the connector J4 after connecting the first output current and the second output current corresponding to the master plug 1 and the slave plug 2 in parallel;

the micro control unit 38 is configured to collect multiple electrical signals detected by the multiple signal detection unit 36, and determine whether phase lines of the master plug 1 and the slave plug 2 are the same, whether the first output current and the second output current are zero, and whether positions of a zero line and a live line of the master plug 1 and the slave plug 2 are the same according to the multiple electrical signals; and if the phase lines of the master plug 1 and the slave plug 2 are the same, neither the first output current nor the second output current is zero, and the positions of the zero line and the live line of the master plug 1 and the slave plug 2 are correspondingly the same, controlling the second parallel unit 37 to execute the operation.

Further, as shown in fig. 7, a corresponding circuit diagram of the parallel control module 3 is provided.

In fig. 7, the multi-path signal detection unit 36 includes four paths of signal detection circuits, each path of signal detection circuit includes a photoelectric coupling circuit, and the first path of signal detection circuit is connected to the zero line of the master plug 1 and the zero line of the slave plug 2; the second path of signal detection circuit is connected with the zero line of the main plug 1 and the live wire of the slave plug 2; the third signal detection circuit is connected with the live wire of the master plug 1 and the zero wire of the slave plug 2; the first path of signal detection circuit is connected with the live wire of the main plug 1 and the live wire of the slave plug 2. The first path of signal detection circuit comprises R44, R45, D10, U5, R52 and C25; the second path of signal detection circuit comprises R46, R47, D11, U6, R53 and C26; the third signal detection circuit comprises R48, R49, D12, U7, R54 and C27; the fourth signal detection circuit comprises R50, R51, D13, U8, R55 and C28. The micro control unit 38 judges whether the phase lines of the master plug 1 and the slave plug 2 are the same, whether the first output current and the second output current are zero, and whether the positions of the neutral line and the live line of the master plug 1 and the slave plug 2 are the same through four signals of TEST _ U1, TEST _ U2, TEST _ U3 and TEST _ U4.

In fig. 7, the circuit diagram corresponding to the second merging unit 37 includes RL7, RL8, RL9, D14, D15, D16, R56, R57, R58, R59, R60, R61, Q6, Q7, and Q8.

In addition, a temperature detection unit 39 is also included in fig. 6, and is used for detecting the temperatures of the master plug 1 and the slave plug 2, so that the micro control unit 38 collects the temperatures of the master plug 1 and the slave plug 2 through the temperature detection unit 39 to prevent the merging when the preset temperature is exceeded. The circuit diagram corresponding to the temperature detection unit 39 in fig. 7 includes T3, R62, R63, C29, and C30.

The working principle of the circuit diagram in fig. 7 is explained taking the predetermined temperature of 65 ℃ as an example:

the main plug 1 and the slave plug 2 are detected by a four-way detection circuit composed of photoelectric coupling chips U5, U6, U7 and U8, and the micro control unit 38MCU collects four-way signals of TEST _ U1, TEST _ U2, TEST _ U3 and TEST _ U4 and temperature signals of the main plug 1 and the slave plug 2 collected by T3 for processing and analysis. Whether the main plug 1 and the slave plug 2 are in the same phase line, whether the main plug 1 and the slave plug 2 are in an unplugged state and whether the polarity directions of the live wire and the zero wire of the main plug 1 and the slave plug 2 are consistent are detected by judging four-way signals of TEST _ U1, TEST _ U2, TEST _ U3 and TEST _ U4, and the temperatures of the main plug 1 and the slave plug 2 are detected through TEMP _ T1 and TEMP _ T2 signals. When detecting that the master plug 1 and the slave plug 2 are different phase lines, the MCU does not control the master plug 2 and the slave plug 2 to be connected in parallel. When the same phase of the main plug 1 and the slave plug 2 is detected and the temperature of the main plug 1 and the temperature of the slave plug 2 are lower than 65 ℃, the polarity (or the position) of the live wire and the zero line of the main plug 1 and the polarity (or the position) of the live wire and the zero line of the slave plug 2 are detected, and when the polarity (or the position) of the live wire and the zero line of the main plug 1 and the slave plug 2 are consistent, the MCU sends switching signals to drive the RL7 and the RL8 relays to suck and output in parallel. When the polarities of the live wire and the zero wire of the main plug 1 and the polarity of the live wire and the zero wire of the auxiliary plug 2 are inconsistent, the MCU sends switching signals to drive the RL7 relay and the RL9 relay to suck and output in parallel. And the temperature and the four-way signal are continuously detected in the output process, and when the temperature is detected to be higher than 65 ℃ or the main plug 1 or the auxiliary plug 2 is pulled out of the corresponding socket, the RL7, RL8 and RL9 relays are immediately cut off to stop outputting. The plug is pulled out to cut off the output, so that the plug is prevented from being electrified and electric shock is prevented.

Further, the apparatus for combining AC power corresponding to fig. 1 further includes a current converting module 4, configured to perform AC/DC conversion on the current obtained through the main plug 1 and then supply power to all units in the combining control module 3.

Further, with respect to the configuration of the ac parallel apparatus corresponding to fig. 1, 6, and 7, a flow corresponding to the operation principle of the apparatus will be described, as shown in fig. 8:

after the equipment (the alternating current parallel connection device) is powered on, the equipment is initialized, the temperature of a master plug and a slave plug is collected, the collected current temperature is displayed through a display screen, four signals corresponding to four detection circuits are collected, whether the bus state is an output state is judged, if not, whether a switch key is pressed is judged, if not, the reason and the non-parallel connection are displayed, if so, whether the temperature of the master plug and the slave plug is normal (the preset temperature is not exceeded) is judged, if not, the reason and the non-parallel connection are displayed, if so, whether the master plug and the slave plug are in the same phase line is detected, if not, the reason and the non-parallel connection are displayed, if the same phase line is judged, whether the master plug and the slave plug are inserted into corresponding sockets or not is judged, if not, the non-parallel connection and the reason are displayed, if the master plug and the slave plug are inserted, the polarity of the zero line of the master plug and the, RL7, RL9 or RL7, RL8 are closed and the parallel current is output from the connector.

In addition, if the bus is in an output state, whether a switch key is pressed down is judged, if the switch key is pressed down, RL7, RL8 and RL9 are disconnected, the bus state is modified to be in a non-output state, the phenomenon that the bus can not be connected and the reason can not be displayed is judged, if the switch key is not pressed down, whether the temperature of the main plug and the slave plug is normal (the preset temperature is not exceeded) is judged, if the temperature of the main plug and the slave plug is abnormal, RL7, RL8 and RL9 are disconnected, the bus state is modified to be in a non-output state, the phenomenon that the bus can not be connected and the reason can not be displayed is judged, if the temperature of the main plug and the slave plug is normal, whether the main plug and the slave plug are not in the same phase line is detected, if the main plug and the slave plug are not in the same phase line, RL7, RL8 and RL9 are disconnected, the bus state is modified to be in a non-output state, the phenomenon, and shows the failure to merge and the reason.

In fig. 8, the bus is connected with the connector, the switch button is started by the whole ac parallel device, and the indicator light state includes a bus output state, a button state, and the like.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.