Power supply wall box and communication vehicle

Abstract

The invention relates to a power supply wall box and a communication van, and the power supply wall box comprises a first sampling device which is used for sampling the current of commercial power to obtain a first sampling current; the electric leakage detection device is provided with a first current end, a first voltage end, a first power supply end and a first signal end, the first current end is electrically connected with the first acquisition device, and the first voltage end is used for being electrically connected with a vehicle body ground and a measurement ground to obtain a first sampling voltage; the power supply device is electrically connected with the mains supply and the first power supply end and is used for converting alternating current of the mains supply into direct current; the controller is provided with a power supply pin and a signal pin, the signal pin is electrically connected with the first signal end, and the power supply pin is electrically connected with the power supply device; and the first switch component is electrically connected with the controller and the commercial power and is used for controlling connection and disconnection between the commercial power and a load.

Description

Technical Field

[0001] This application relates to the technical field of power wall boxes, and particularly to power wall boxes and communication vehicles. Background Art

[0002] A communication vehicle is a special vehicle equipped with communication equipment, used to ensure communication links, especially in remote areas or under complex climatic conditions. It is usually divided into emergency integrated communication vehicles, network management vehicles, program-controlled telephone vehicles, adaptive frequency-hopping radio vehicles, digital spread-spectrum relay vehicles, scatter communication vehicles, satellite communication vehicles, optical cable connection vehicles, cable winding and unwinding vehicles, and communication power vehicles, etc.

[0003] As a key component of a communication vehicle, the power wall box plays a crucial role. It is not only the interface for connecting the communication vehicle to an external power source but also responsible for providing a stable and safe power supply to communication equipment.

[0004] In a communication vehicle, the power wall box provides a flexible power access solution for communication equipment through its diverse interfaces and connection methods. It supports mains input, generator input, AC output, and grounding, meeting the power requirements of the communication vehicle in different environments.

[0005] Currently, for the power wall box of a communication vehicle, the leakage current situation of the power wall box is mainly detected manually, with relatively low real-time performance. Summary of the Invention

[0006] To solve or partially solve the problems existing in the related art, this application provides a power wall box and a communication vehicle, which can solve the technical problem that the leakage current situation of the power wall box of the current communication vehicle is mainly detected manually, with relatively low real-time performance.

[0007] In the first aspect of this application, a power wall box is provided, which includes:

[0008] A first sampling device, configured to sample the current of the mains electricity to obtain a first sampled current;

[0009] A leakage detection device, having a first current terminal, a first voltage terminal, a first power terminal, and a first signal terminal. The first current terminal is electrically connected to the first acquisition device, and the first voltage terminal is used to be electrically connected to the vehicle body ground and the measurement ground to obtain a first sampled voltage;

[0010] A power supply device, electrically connected to the mains electricity and the first power terminal, configured to convert the alternating current of the mains electricity into direct current;

[0011] A controller, having a power pin and a signal pin. The signal pin is electrically connected to the first signal terminal, and the power pin is electrically connected to the power supply device; and

[0012] A first switch component, electrically connected to the controller and the mains power supply, for controlling the on / off between the mains power supply and the load;

[0013] Wherein, the leakage detection device generates a first signal according to the comparison result between the first sampled current obtained from the first current terminal and the first set current, and sends the first signal to the controller. The controller generates a first control signal according to the first signal to control the first switch component to connect or disconnect the connection between the mains power supply and the load;

[0014] The leakage detection device generates a second signal according to the comparison result between the first sampled voltage obtained from the first voltage terminal and the first set voltage, and sends the second signal to the controller. The controller generates a second control signal according to the second signal to control the first switch component to connect or disconnect the connection between the mains power supply and the load.

[0015] In some embodiments of the present application, it further includes:

[0016] A second acquisition device, for sampling the current of the mains power supply to obtain a second sampled current;

[0017] A voltage and current detection device, having a second current terminal, a second voltage terminal, a second power supply terminal and a second signal terminal. The second current terminal is electrically connected to the second acquisition device, the second voltage terminal is used to connect to the mains power supply to obtain a second sampled voltage, the second power supply terminal is electrically connected to the power supply device, and the second signal terminal is electrically connected to the signal pin;

[0018] Wherein, the voltage and current detection device generates a third signal according to the comparison result between the second sampled current obtained from the second current terminal and the second set current, and sends the third signal to the controller. The controller generates a third control signal according to the third signal to control the first switch component to connect or disconnect the connection between the mains power supply and the load;

[0019] The voltage and current detection device generates a fourth signal according to the comparison result between the second sampled voltage obtained from the second voltage terminal and the second set voltage, and sends the fourth signal to the controller. The controller generates a fourth control signal according to the fourth signal to control the first switch component to connect or disconnect the connection between the mains power supply and the load.

[0020] In some embodiments of the present application, the alarm circuit includes:

[0021] An alarm, electrically connected to the negative electrode of the power supply device. The controller has an alarm pin, and the alarm is electrically connected to the alarm pin. When a high level is output at the alarm pin, the alarm gives an alarm.

[0022] In some embodiments of the present application, it further includes:

[0023] An insurance switch, having a trigger and a normally closed contact, the trigger being connected in parallel with the neutral wire and the live wire of the mains power supply, the trigger being triggered when a mains power failure occurs, the controller having a power control terminal, the power control terminal being electrically connected to the positive pole of the power supply device, the normally closed contact being connected in series between the power control terminal and the positive pole of the power supply device;

[0024] Wherein, when the trigger is not triggered, the normally closed contact is closed to connect the positive pole of the power control terminal and the power control terminal;

[0025] When the trigger is triggered during a mains power failure, the normally closed contact is opened to disconnect the positive pole of the power control terminal and the power control terminal.

[0026] In some embodiments of the present application, the trigger includes:

[0027] A first trigger, connected in parallel with the neutral wire and the live wire of the mains power supply;

[0028] A second trigger, connected in parallel with the neutral wire and the live wire of the mains power supply;

[0029] A third trigger, connected in parallel with the neutral wire and the live wire of the mains power supply, the first trigger, the second trigger and the third trigger are sequentially connected in series to form a series circuit, both ends of the series circuit are connected to the neutral wire of the mains power supply, and the circuit between the second trigger and the third trigger is grounded;

[0030] Wherein, when any one of the first trigger, the second trigger or the third trigger is triggered, the normally closed contact is opened.

[0031] In some embodiments of the present application, the first switch component includes:

[0032] A first switch, connected in series on the live wire between the mains power supply and the load;

[0033] A second switch, connected in series on the live wire between the mains power supply and the load;

[0034] A fourth trigger, electrically connected to the negative pole of the power supply device, the controller having a first control terminal, the fourth trigger being electrically connected to the first control terminal, for when a high level is output at the first control terminal, the first switch is closed to conduct the live wire between the mains power supply and the load, and when a low level is output at the first control terminal, the first switch is opened to disconnect the live wire between the mains power supply and the load;

[0035] The fifth trigger is electrically connected to the negative electrode of the power supply device. The controller has a second control terminal, and the fifth trigger is electrically connected to the second control terminal. When a high level is output at the second control terminal, the second switch closes to conduct the neutral wire between the commercial power and the load. When a low level is output at the second control terminal, the second switch opens to disconnect the neutral wire between the commercial power and the load.

[0036] In some embodiments of the present application, it further includes:

[0037] The first diode is connected in parallel with the fourth trigger;

[0038] The second diode is connected in parallel with the fifth trigger.

[0039] In some embodiments of the present application, it further includes:

[0040] The security board is electrically connected to the power supply device, the vehicle body ground, and the measurement ground. The controller has a ground wire terminal and an audio terminal, and the security board is electrically connected to the ground wire terminal and the audio terminal respectively;

[0041] The third switch is connected in series between the security board and the audio terminal, and one end of the third switch is electrically connected to the positive electrode of the power supply device. When the alarm sounds, the third switch closes, and the audio terminal receives the high level of the positive electrode of the power supply device;

[0042] The sound device is electrically connected to the power supply device, the leakage detection device, and the power supply voltage detection device, and is used to perform corresponding voice alarms or mutes according to the received first signal, the second signal, the third signal, or the fourth signal.

[0043] In some embodiments of the present application, it further includes:

[0044] The first CAN bus. The controller has a positive electrode feedback terminal, and the positive electrode feedback terminal is connected to the first CAN bus;

[0045] The second CAN bus. The controller has a negative electrode feedback terminal, and the negative electrode feedback terminal is electrically connected to the second CAN bus.

[0046] The second aspect of the present application provides a communication vehicle, including:

[0047] The power wall box according to any one of the above embodiments.

[0048] The technical solution provided by the present application can include the following beneficial effects:

[0049] The power supply wall box and communication vehicle of the present application. The power supply wall box includes a first sampling device, a leakage detection device, a power supply device, a controller, and a first switch component. The first sampling device samples the current of the commercial power to obtain a first sampled current. The power supply device is connected to the commercial power and converts the alternating current of the commercial power into direct current. The controller has a power supply pin and a signal pin. The signal pin is electrically connected to the first signal terminal, and the power supply pin is electrically connected to the power supply device. Among them, the leakage detection device generates a first signal according to the result of comparing the first sampled current obtained from the first current terminal with a first set current and sends it to the controller. The controller generates a first control signal according to the first signal to control the first switch component to connect or disconnect the connection between the commercial power and the load; the leakage detection device generates a second signal according to the result of comparing the first sampled voltage obtained from the first voltage terminal with the first set voltage and sends it to the controller. The controller generates a second control signal according to the second signal to control the first switch component to connect or disconnect the connection between the commercial power and the load. Through the power supply wall box of this embodiment, it can effectively solve the problem that the power supply wall box of the current communication vehicle mainly detects the leakage of the power supply wall box manually, and its real-time performance is relatively low. Moreover, it can reduce the labor cost and can respond in time when the power supply wall box leaks. Its structure is simple, has strong versatility and anti-interference ability, can adapt to the power supply wall box in various environments, can meet the needs of different users, and ensures the safe and stable operation of the power supply wall box.

[0050] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. Brief Description of the Drawings

[0051] By describing the exemplary embodiments of the present application in more detail in conjunction with the drawings, the above and other objects, features, and advantages of the present application will become more obvious. Among them, in the exemplary embodiments of the present application, the same reference numerals generally represent the same components.

[0052] Figure 1 It is a circuit schematic diagram of the power supply wall box shown in the embodiment of the present application.

[0053] Wherein:

[0054] KM11, the first switch; KM12, the second switch; KM1, the fourth flip-flop; KM2, the fifth flip-flop; Z1, the safety isolation transformer; U1, the controller; U2, the voltage and current detection device; U3, the leakage detection device; U4, the power supply device; U5, the sound device; U6, the security board; F1, the first flip-flop; F2, the second flip-flop; F3, the third flip-flop; F, the normally closed contact; H12, the alarm; M, the first CAN bus; N, the second CAN bus; D1, the first diode; D2, the second diode; SB1, the third switch; QF, the leakage voltage protector. Detailed implementation mode

[0055] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0056] It should be understood that although the terms "first", "second", "third", etc. may be used in the present application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present application, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0057] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application.

[0058] Unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0059] Figure 1 It is a circuit schematic diagram of the power wall box shown in the embodiments of the present application.

[0060] See Figure 1 , the first aspect of the present application provides a power wall box, including:

[0061] A first sampling device for sampling the current of the commercial power to obtain a first sampled current;

[0062] A leakage detection device U3 having a first current terminal, a first voltage terminal, a first power terminal and a first signal terminal. The first current terminal is electrically connected to the first acquisition device, and the first voltage terminal is used to be electrically connected to the vehicle body ground and the measurement ground to obtain a first sampled voltage;

[0063] A power supply device U4 electrically connected to the commercial power and the first power terminal for converting the alternating current of the commercial power into direct current;

[0064] A controller U1 having a power supply pin and a signal pin. The signal pin is electrically connected to the first signal terminal, and the power supply pin is electrically connected to the power supply device U4; and

[0065] A first switch component electrically connected to the controller U1 and the commercial power for controlling the on-off between the commercial power and the load;

[0066] Wherein, the leakage detection device U3 generates a first signal according to the comparison result of the first sampled current obtained from the first current terminal and a first set current, and sends the first signal to the controller U1. The controller U1 generates a first control signal according to the first signal to control the first switch component to connect or disconnect the connection between the commercial power and the load;

[0067] The leakage detection device U3 generates a second signal according to the comparison result of the first sampled voltage obtained from the first voltage terminal and the first set voltage, and sends the second signal to the controller U1. The controller U1 generates a second control signal according to the second signal to control the first switch component to connect or disconnect the connection between the commercial power and the load.

[0068] In some embodiments of the present application, a second acquisition device for sampling the current of the commercial power to obtain a second sampled current;

[0069] A voltage and current detection device U2 having a second current terminal, a second voltage terminal, a second power terminal and a second signal terminal. The second current terminal is electrically connected to the second acquisition device, the second voltage terminal is used to connect to the commercial power to obtain a second sampled voltage, the second power terminal is electrically connected to the power supply device U4, and the second signal terminal is electrically connected to the signal pin;

[0070] Among them, the voltage and current detection device U2 generates a third signal according to the result of comparing the second sampled current obtained from the second current terminal with the second set current, and sends the third signal to the controller U1. The controller U1 generates a third control signal according to the third signal to control the first switching component to connect or disconnect the connection between the mains power and the load.

[0071] The voltage and current detection device U2 generates a fourth signal according to the result of comparing the second sampled voltage obtained from the second voltage terminal with the second set voltage, and sends the fourth signal to the controller U1. The controller U1 generates a fourth control signal according to the fourth signal to control the first switching component to connect or disconnect the connection between the mains power and the load.

[0072] The power wall box and communication vehicle of the present application. The power wall box includes a first sampling device, a leakage detection device U3, a power supply device U4, a controller U1, and a first switching component. The first sampling device samples the current of the mains power to obtain a first sampled current. The power supply device U4 is connected to the mains power and converts the alternating current of the mains power into direct current. The controller U1 has a power supply pin and a signal pin. The signal pin is electrically connected to the first signal terminal, and the power supply pin is electrically connected to the power supply device U4.

[0073] Among them, the leakage detection device U3 generates a first signal according to the result of comparing the first sampled current obtained from the first current terminal with the first set current, and sends the first signal to the controller U1. The controller U1 generates a first control signal according to the first signal to control the first switching component to connect or disconnect the connection between the mains power and the load. The leakage detection device U3 generates a second signal according to the result of comparing the first sampled voltage obtained from the first voltage terminal with the first set voltage, and sends the second signal to the controller U1. The controller U1 generates a second control signal according to the second signal to control the first switching component to connect or disconnect the connection between the mains power and the load. Through the power wall box of this embodiment, it can effectively solve the problem that the power wall box of the current communication vehicle mainly detects the leakage of the power wall box manually, and its real-time performance is low. Moreover, it can reduce the labor cost, and can respond in time when the power wall box leaks. Its structure is simple, with strong versatility and anti-interference ability. It can adapt to the power wall box in various environments, can meet the needs of different users, and ensures the safe and stable operation of the power wall box.

[0074] In the embodiment of the present application, the mains power includes a live wire, a neutral wire, and a ground wire. In this embodiment, the ground wire of the mains power is directly grounded, and the mains power is connected to the load through the live wire and the neutral wire to supply power to the load.

[0075] In this embodiment, a linked leakage voltage protector QF can also be connected in series between the mains power supply and the load. In the case of a leakage voltage, the leakage voltage protector QF connects the live wire and the neutral wire. In the event of a leakage voltage, the leakage voltage protector QF disconnects to protect the load.

[0076] In this embodiment, a linked leakage voltage protector QF can also be connected in series between the mains power supply and the load. In the case of a leakage voltage, the leakage voltage protector QF connects the live wire and the neutral wire. In the event of a leakage voltage, the leakage voltage protector QF disconnects to protect the load.

[0077] In some embodiments of the present application, it further includes:

[0078] A safety isolation transformer Z1, the first end of the safety isolation transformer Z1 is grounded, the second end of the safety isolation transformer Z1 is used as the input end to connect to the live wire, the third end of the safety isolation transformer Z1 is used as the input end to connect to the neutral wire, the fourth end of the safety isolation transformer Z1 is used as the output end to be electrically connected to the load, and the fifth end of the safety isolation transformer Z1 is used as the output end to be electrically connected to the load. The safety isolation transformer Z1 is used to improve the safety and anti-interference ability of the power supply wall box through electrical isolation. It isolates the input and output circuits through the principle of electromagnetic induction, cuts off the influence of the input-side fault current (such as leakage, short circuit) on the output side, and prevents the risk of electric shock.

[0079] In this embodiment, the leakage detection device U3 actually includes a leakage voltage detection device and a leakage current detection device. The leakage voltage detection device and the leakage current detection device can also be integrated into a leakage detection device U3 in an integrated manner.

[0080] The first sampling device can be a combined current transformer or a voltage-current integrated sensor, including a current transformer (CT) and a voltage transformer (PT). The voltage transformer (PT) or a voltage-dividing resistor reduces the high voltage (such as 220V AC) to a safe range (such as 0 - 5V) in proportion.

[0081] The current transformer (CT) converts a large current into a small current signal (such as 100A → 5A or milliamp level) through the principle of electromagnetic induction. The output signal is proportional to the input current and is used for meters or protection devices.

[0082] In this embodiment, the power supply device U4 can be a device that converts the mains power supply into direct current, for example, a device that converts it into 24V direct current. The power supply device U4 has a positive pole and a negative pole.

[0083] The controller U1 can be a PLC programmable controller U1, specifically an RS485 type PLC programmable controller U1. Its power supply pins include a power supply positive pole pin and a power supply negative pole pin, which can be respectively connected to the positive pole and the negative pole of the power supply.

[0084] The first switching component can be a relay, which is connected in series between the mains power supply and the load, and the opening and closing of the first switching component are controlled by the first control signal or the second control signal of the controller U1.

[0085] In this embodiment, the leakage detection device U3 generates a first signal according to the result of comparing the first sampled current obtained from the first current terminal with the first set current, and sends the first signal to the controller U1.

[0086] Among them, when the first sampled current obtained from the first current terminal is greater than the first set current, that is, a leakage problem occurs, a first signal with a high level is generated and sent into the controller U1. The controller U1 controls the first switching component by outputting a first control signal with a low level. For example, when the first switching component is connected to the positive pole of the power supply, the controller U1 outputs a first control signal with a low level at this time to trigger the first switching component, so that the mains power supply is disconnected from the load.

[0087] When the first sampled current obtained from the first current terminal is less than or equal to the first set current, that is, no leakage problem occurs, a second signal with a low level is generated and sent into the controller U1. The controller U1 controls the first switching component by outputting a first control signal with a high level. For example, when the first switching component is connected to the positive pole of the power supply, the controller U1 outputs a first control signal with a high level at this time to trigger the first switching component, so that the mains power supply is connected to the load.

[0088] In this embodiment, the leakage detection device U3 generates a second signal according to the result of comparing the first sampled voltage obtained from the first voltage terminal with the first set voltage, and sends the second signal to the controller U1.

[0089] Among them, when the first sampled voltage obtained from the first voltage terminal is greater than the first set voltage, that is, a leakage problem occurs, a second signal with a high level is generated and sent into the controller U1. The controller U1 controls the first switching component by outputting a second control signal with a low level. For example, when the first switching component is connected to the positive pole of the power supply, the controller U1 outputs a second control signal with a low level at this time to trigger the first switching component, so that the mains power supply is disconnected from the load.

[0090] When the first sampled voltage obtained from the first voltage terminal is less than or equal to the first set voltage, that is, no leakage problem occurs, a second signal with a low level is generated and sent into the controller U1. The controller U1 controls the first switching component by outputting a second control signal with a high level. For example, when the first switching component is connected to the positive pole of the power supply, the controller U1 outputs a second control signal with a high level at this time to trigger the first switching component, so that the mains power supply is connected to the load.

[0091] In this embodiment, the vehicle body ground (chassis ground) is directly connected to the vehicle metal frame to serve as the safety ground for the equipment housing. In the event of a leakage or insulation fault, the vehicle body ground can direct the dangerous current to the ground to prevent the risk of electric shock.

[0092] The measurement ground (signal ground) provides a low-noise reference potential for sensors, control circuits, etc., and is usually connected to the vehicle body ground through isolation or filtering to avoid interference of fault current with sensitive circuits.

[0093] In some embodiments of the present application, it further includes:

[0094] A second acquisition device for sampling the current of the commercial power to obtain a second sampled current;

[0095] A voltage and current detection device U2 having a second current terminal, a second voltage terminal, a second power terminal, and a second signal terminal. The second current terminal is electrically connected to the second acquisition device. The second voltage terminal is used to connect to the commercial power to obtain a second sampled voltage. The second power terminal is electrically connected to the power supply device U4, and the second signal terminal is electrically connected to the signal pin;

[0096] Wherein, the voltage and current detection device U2 generates a third signal according to the result of comparing the second sampled current obtained from the second current terminal with a second set current and sends it to the controller U1. The controller U1 generates a third control signal according to the third signal to control the first switch component to connect or disconnect the connection between the commercial power and the load;

[0097] The voltage and current detection device U2 generates a fourth signal according to the result of comparing the second sampled voltage obtained from the second voltage terminal with a second set voltage and sends it to the controller U1. The controller U1 generates a fourth control signal according to the fourth signal to control the first switch component to connect or disconnect the connection between the commercial power and the load.

[0098] In this embodiment, the second acquisition device can be a current transformer and a voltage transformer to sample the current of the commercial power to obtain a second sampled current.

[0099] The voltage and current detection device U2 generates a third signal according to the result of comparing the second sampled current obtained from the second current terminal with a second set current and sends it to the controller U1. When the second sampled current obtained from the second current terminal is greater than the second set current, that is, an overcurrent problem, a high-level third signal is sent into the controller U1. The controller U1 controls the first switch component by outputting a low-level second control signal. For example, when the first switch component is connected to the positive pole of the power supply, the controller U1 outputs a low-level second control signal at this time to trigger the first switch component, so that the connection between the commercial power and the load is disconnected.

[0100] When the second sampled current obtained at the second current terminal is less than or equal to the second set current, that is, when there is no overcurrent problem, a third signal with a low level is generated and sent to the controller U1. The controller U1 controls the first switching component by outputting a second control signal with a high level. For example, when the first switching component is connected to the positive pole of the power supply, the second control signal output by the controller U1 at this time is at a high level to trigger the first switching component, so that the mains power is connected to the load indirectly.

[0101] The voltage and current detection device U2 generates a fourth signal according to the result of comparing the second sampled voltage obtained at the second voltage terminal with the second set voltage and sends it to the controller U1. When the second sampled voltage obtained at the second voltage terminal is greater than the second set voltage, that is, when there is an overvoltage problem, a fourth signal with a high level is generated and sent to the controller U1. The controller U1 controls the first switching component by outputting a second control signal with a low level. For example, when the first switching component is connected to the positive pole of the power supply, the second control signal output by the controller U1 at this time is at a low level to trigger the first switching component, so that the mains power is disconnected from the load.

[0102] When the second sampled voltage obtained at the second voltage terminal is less than or equal to the second set voltage, that is, when there is no overvoltage problem, a fourth signal with a low level is generated and sent to the controller U1. The controller U1 controls the first switching component by outputting a second control signal with a high level. For example, when the first switching component is connected to the positive pole of the power supply, the second control signal output by the controller U1 at this time is at a high level to trigger the first switching component, so that the mains power is connected to the load indirectly.

[0103] Among them, the first acquisition device and the second acquisition device can also be electric quantity isolation transmitters.

[0104] In some embodiments of the present application, the alarm circuit includes:

[0105] An alarm H12, electrically connected to the negative pole of the power supply device U4. The controller U1 has an alarm pin, and the alarm H12 is electrically connected to the alarm pin. When a high level is output at the alarm pin, the alarm H12 gives an alarm.

[0106] In this embodiment, the alarm H12 can be a buzzer or an alarm lamp, etc. When a high level is output at the alarm pin of the controller U1, the alarm H12 gives an alarm to prompt the user to process it in time.

[0107] In some embodiments of the present application, it further includes:

[0108] The fuse switch has a trigger and a normally closed contact F. The trigger is connected in parallel with the neutral wire and the live wire of the mains power supply. The trigger is triggered when there is a fault in the mains power supply. The controller U1 has a power control terminal, and the power control terminal is electrically connected to the positive pole of the power supply device U4. The normally closed contact F is connected in series between the power control terminal and the positive pole of the power supply device U4;

[0109] Wherein, when the trigger is not triggered, the normally closed contact F is closed to connect the positive pole of the power control terminal and the power control terminal;

[0110] When the trigger is triggered during a mains power supply fault, the normally closed contact F is opened to disconnect the positive pole of the power control terminal and the power control terminal.

[0111] In this embodiment, through the normally closed contact F of the fuse switch, the positive pole of the power supply device U4 can continuously output a high level to the controller U1. When the controller U1 receives the high level, it can know that there is no fault such as a short circuit in the current mains power supply circuit.

[0112] When the trigger is triggered during a mains power supply fault, the normally closed contact F is opened to disconnect the positive pole of the power control terminal and the power control terminal. At this time, the power control terminal of the controller U1 receives a low level or no level input after the normally closed contact F is opened, and it can know that there is a fault in the current mains power supply circuit, and perform corresponding alarm processing or disconnect other circuits in time to prevent the controller U1 itself or other devices from being damaged.

[0113] In some embodiments of the present application, the trigger includes:

[0114] A first trigger F1, connected in parallel with the neutral wire and the live wire of the mains power supply;

[0115] A second trigger F2, connected in parallel with the neutral wire and the live wire of the mains power supply;

[0116] A third trigger F3, connected in parallel with the neutral wire and the live wire of the mains power supply. The first trigger F1, the second trigger F2, and the third trigger F3 are sequentially connected in series to form a series circuit. Both ends of the series circuit are connected to the neutral wire of the mains power supply, and the circuit between the second trigger F2 and the third trigger F3 is grounded;

[0117] Wherein, when any one of the first trigger F1, the second trigger F2, or the third trigger F3 is triggered, the normally closed contact F is opened.

[0118] In this embodiment, the first trigger F1, the second trigger F2, or the third trigger F3 can be triggered in a timely manner when a fault occurs in any section of the multi-section mains circuit.

[0119] Moreover, the first trigger F1, the second trigger F2, and the third trigger F3 are connected in series in sequence to form a series circuit. Both ends of the series circuit are connected to the neutral line of the mains power supply, so that when a fault occurs anywhere in the mains power supply, the loop impedance increases suddenly, accelerating the current to zero and reducing the arc risk. Compared with the traditional fuse that only cuts off the live wire, but there is still a risk that the neutral wire is energized; the series connection method of this embodiment can directly cut off the neutral wire and completely isolate the power supply.

[0120] In some embodiments of the present application, the first switch component includes:

[0121] The first switch KM11, which is connected in series on the live wire between the mains power supply and the load;

[0122] The second switch KM12, which is connected in series on the live wire between the mains power supply and the load;

[0123] The fourth trigger KM1 is electrically connected to the negative pole of the power supply device U4. The controller U1 has a first control end, and the fourth trigger KM1 is electrically connected to the first control end. When a high level is output at the first control end, the first switch KM11 is closed to conduct the live wire between the mains power supply and the load. When a low level is output at the first control end, the first switch KM11 is opened to disconnect the live wire between the mains power supply and the load;

[0124] The fifth trigger KM2 is electrically connected to the negative pole of the power supply device U4. The controller U1 has a second control end, and the fifth trigger KM2 is electrically connected to the second control end. When a high level is output at the second control end, the second switch KM12 is closed to conduct the neutral wire between the mains power supply and the load. When a low level is output at the second control end, the second switch KM12 is opened to disconnect the neutral wire between the mains power supply and the load.

[0125] In this embodiment, the first switch component can be controlled by the fourth trigger KM1 and the fifth trigger KM2, and the fourth trigger KM1 and the fifth trigger KM2 can be controlled according to the controller U1, so that when problems such as leakage voltage, leakage current, overvoltage, or overcurrent occur, the live wire and the neutral wire between the mains power supply and the load can be disconnected in a timely manner through the controller U1, thus ensuring the safety of the equipment and the operator.

[0126] In some embodiments of the present application, it further includes:

[0127] The first diode D1 is connected in parallel with the fourth flip-flop KM1;

[0128] The second diode D2 is connected in parallel with the fifth flip-flop KM2.

[0129] In this embodiment, the first diode D1 and the second diode D2 are lit simultaneously when the fourth flip-flop KM1 and the fifth flip-flop KM2 receive a high level, so as to be able to remind the user that the device is in a normal working state at this time. When the fourth flip-flop KM1 and the fifth flip-flop KM2 receive a low level, the first diode D1 and the second diode D2 cannot be lit, which also reminds the user that the first switch KM11 and the second switch KM12 have been disconnected at this time.

[0130] In some embodiments of the present application, it further includes:

[0131] A security board U6 is electrically connected to the power supply device U4, the vehicle body ground, and the measurement ground. The controller U1 has a ground wire terminal and an audio terminal, and the security board U6 is electrically connected to the ground wire terminal and the audio terminal respectively;

[0132] A third switch SB1 is connected in series between the security board U6 and the audio terminal, and one end of the third switch SB1 is electrically connected to the positive pole of the power supply device U4. When the alarm H12 alarms, the third switch SB1 closes, and the audio terminal receives the high level of the positive pole of the power supply device U4;

[0133] A sound device U5 is electrically connected to the power supply device U4, the leakage detection device U3, and the power supply voltage detection device, and is used to perform corresponding voice warnings or mutes when receiving the first signal, the second signal, the third signal, or the fourth signal.

[0134] In this embodiment, the security board U6 can be connected to the ground wire signal pin of the PLC to ensure consistent logic levels, avoid communication interference, and collect the information of the ground wire.

[0135] Through the third switch SB1, when the alarm H12 alarms, the high level received by the audio terminal of the controller U1 can be used to control a buzzer or other warning devices to give a warning to remind the user to pay attention.

[0136] The sound device U5 can directly perform corresponding voice warnings or mutes according to the leakage detection device U3 and the power supply voltage detection device when receiving the first signal, the second signal, the third signal, or the fourth signal, so as to timely remind the user to pay attention in case of leakage, overcurrent, or overvoltage.

[0137] In some embodiments of the present application, it further includes:

[0138] The first CAN bus M, the controller U1 has a positive feedback terminal, and the positive feedback terminal is connected to the first CAN bus M;

[0139] The second CAN bus N, the controller U1 has a negative feedback terminal, and the negative feedback terminal is electrically connected to the second CAN bus N.

[0140] In this embodiment, the values of the input voltage, input current, leakage current, leakage voltage, and ground wire collected by the PLC are transmitted to the host computer or the centralized management and control device through the communication methods of the first CAN bus M and the second CAN bus N. The host computer or the centralized management and control device can also set the thresholds of various protections by issuing instructions.

[0141] The second aspect of the present application provides a communication vehicle, including:

[0142] The power supply wall box according to any one of the above embodiments.

[0143] The communication vehicle of the present application, wherein the power supply wall box includes a first sampling device, a leakage detection device U3, a power supply device U4, a controller U1, and a first switch component. The first sampling device samples the current of the commercial power to obtain a first sampling current. The power supply device U4 is connected to the commercial power and converts the alternating current of the commercial power into direct current. The controller U1 has a power supply pin and a signal pin. The signal pin is electrically connected to the first signal terminal, and the power supply pin is electrically connected to the power supply device U4. Among them, the leakage detection device U3 generates a first signal according to the comparison result of the first sampling current obtained from the first current terminal and a first set current and sends it to the controller U1. The controller U1 generates a first control signal according to the first signal to control the first switch component to connect or disconnect the connection between the commercial power and the load; the leakage detection device U3 generates a second signal according to the comparison result of the first sampling voltage obtained from the first voltage terminal and the first set voltage and sends it to the controller U1. The controller U1 generates a second control signal according to the second signal to control the first switch component to connect or disconnect the connection between the commercial power and the load. Through the power supply wall box of this embodiment, it can effectively solve the problem that the power supply wall box of the current communication vehicle mainly detects the leakage situation of the power supply wall box manually, and its real-time performance is relatively low, and it can reduce the labor cost. It can respond in time when the power supply wall box leaks. Its structure is simple, has strong versatility and strong anti-interference ability, can adapt to the power supply wall boxes in various environments, can meet the needs of different users, and ensures the safe and stable operation of the power supply wall box.

[0144] The solutions of the present application have been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of the various embodiments each have their own focuses. For parts not described in detail in a certain embodiment, reference may be made to the relevant descriptions of other embodiments. Those skilled in the art should also be aware that the actions and modules involved in the specification are not necessarily essential to the present application. Additionally, it can be understood that the steps in the method embodiments of the present application can be adjusted, combined, and deleted according to actual needs, and the modules in the device embodiments of the present application can be combined, divided, and deleted according to actual needs.

[0145] The various embodiments of the present application have been described above. The above description is exemplary and not exhaustive, and is also not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to technologies in the market, or to enable other ordinary skilled in the art in the technical field to understand the disclosed embodiments.

Claims

1. A power wall box, characterized in that, Including: A first sampling device for sampling the current of the mains power supply to obtain a first sampled current; A leakage detection device having a first current terminal, a first voltage terminal, a first power supply terminal and a first signal terminal. The first current terminal is electrically connected to the first acquisition device, and the first voltage terminal is used to be electrically connected to the vehicle body ground and the measurement ground to obtain a first sampled voltage; A power supply device electrically connected to the mains power supply and the first power supply terminal for converting the alternating current of the mains power supply into direct current; A controller having a power supply pin and a signal pin. The signal pin is electrically connected to the first signal terminal, and the power supply pin is electrically connected to the power supply device; And A first switch component electrically connected to the controller and the mains power supply for controlling the on / off between the mains power supply and the load; Wherein, the leakage detection device generates a first signal according to the result of comparing the first sampled current obtained from the first current terminal with a first set current and sends it to the controller. The controller generates a first control signal according to the first signal to control the first switch component to connect or disconnect the connection between the mains power supply and the load; The leakage detection device generates a second signal according to the result of comparing the first sampled voltage obtained from the first voltage terminal with the first set voltage and sends it to the controller. The controller generates a second control signal according to the second signal to control the first switch component to connect or disconnect the connection between the mains power supply and the load.

2. The power supply wall box according to claim 1, characterized in that, Further including: A second acquisition device for sampling the current of the mains power supply to obtain a second sampled current; A voltage and current detection device having a second current terminal, a second voltage terminal, a second power supply terminal and a second signal terminal. The second current terminal is electrically connected to the second acquisition device, the second voltage terminal is used to connect to the mains power supply to obtain a second sampled voltage, the second power supply terminal is electrically connected to the power supply device, and the second signal terminal is electrically connected to the signal pin; Wherein, the voltage and current detection device generates a third signal according to the result of comparing the second sampled current obtained from the second current terminal with a second set current and sends it to the controller. The controller generates a third control signal according to the third signal to control the first switch component to connect or disconnect the connection between the mains power supply and the load; The voltage and current detection device generates a fourth signal according to the result of comparing the second sampled voltage obtained from the second voltage terminal with a second set voltage and sends it to the controller. The controller generates a fourth control signal according to the fourth signal to control the first switch component to connect or disconnect the connection between the mains power supply and the load.

3. The power supply wall box according to claim 2, characterized in that, The alarm circuit includes: An alarm electrically connected to the negative electrode of the power supply device. The controller has an alarm pin, and the alarm is electrically connected to the alarm pin. When a high level is output at the alarm pin, the alarm gives an alarm.

4. The power supply wall box according to claim 3, characterized in that, Further including: The insurance switch has a trigger and a normally closed contact. The trigger is connected in parallel with the neutral wire and the live wire of the mains power supply. The trigger is triggered when there is a fault in the mains power supply. The controller has a power control terminal, and the power control terminal is electrically connected to the positive pole of the power supply device. The normally closed contact is connected in series between the power control terminal and the positive pole of the power supply device; Wherein, when the trigger is not triggered, the normally closed contact is closed to connect the positive pole of the power control terminal and the power control terminal; When the trigger is triggered during a mains power supply fault, the normally closed contact is opened to disconnect the positive pole of the power control terminal and the power control terminal.

5. The power supply wall box according to claim 4, wherein The trigger includes: The first trigger, connected in parallel with the neutral wire and the live wire of the mains power supply; The second trigger, connected in parallel with the neutral wire and the live wire of the mains power supply; The third trigger, connected in parallel with the neutral wire and the live wire of the mains power supply. The first trigger, the second trigger, and the third trigger are sequentially connected in series to form a series circuit. Both ends of the series circuit are connected to the neutral wire of the mains power supply, and the circuit between the second trigger and the third trigger is grounded; Wherein, when any one of the first trigger, the second trigger, or the third trigger is triggered, the normally closed contact is opened.

6. The power supply wall box according to claim 5, wherein The first switch component includes: The first switch, connected in series on the live wire between the mains power supply and the load; The second switch, connected in series on the live wire between the mains power supply and the load; The fourth trigger, electrically connected to the negative pole of the power supply device. The controller has a first control terminal, and the fourth trigger is electrically connected to the first control terminal. When a high level is output at the first control terminal, the first switch is closed to conduct the live wire between the mains power supply and the load. When a low level is output at the first control terminal, the first switch is opened to disconnect the live wire between the mains power supply and the load; The fifth trigger, electrically connected to the negative pole of the power supply device. The controller has a second control terminal, and the fifth trigger is electrically connected to the second control terminal. When a high level is output at the second control terminal, the second switch is closed to conduct the neutral wire between the mains power supply and the load. When a low level is output at the second control terminal, the second switch is opened to disconnect the neutral wire between the mains power supply and the load.

7. The power supply wall box according to claim 6, wherein, It further includes: The first diode, connected in parallel with the fourth trigger; The second diode, connected in parallel with the fifth trigger.

8. The power supply wall box according to claim 7, wherein, It further includes: The security board, electrically connected to the power supply device, the vehicle body ground, and the measurement ground. The controller has a ground wire terminal and an audio terminal, and the security board is electrically connected to the ground wire terminal and the audio terminal respectively; The third switch, connected in series between the security board and the audio terminal, and one end of the third switch is electrically connected to the positive pole of the power supply device. When the alarm sounds, the third switch is closed, and the audio terminal receives the high level of the positive pole of the power supply device; The sound device, electrically connected to the power supply device, the leakage detection device, and the power supply voltage detection device, for performing corresponding voice warnings or mutes according to the received first signal, the second signal, the third signal, or the fourth signal.

9. The power supply wall box according to claim 8, characterized in that, Further comprising: A first CAN bus, the controller has a positive feedback terminal, and the positive feedback terminal is connected to the first CAN bus; A second CAN bus, the controller has a negative feedback terminal, and the negative feedback terminal is electrically connected to the second CAN bus.

10. A communication vehicle, characterized in that, Comprising: The power wall box according to any one of claims 1-9.

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