A power distribution circuit for a busbar cabinet uninterruptible power supply

Abstract

The application discloses a power distribution circuit of a busbar cabinet uninterrupted power supply, which comprises a power module, a switch module and a second device. The power module comprises a first output end and a second output end. The first output end is used for supplying power to a first device. The first end of the switch module is connected with the second output end. The second end of the switch module is used for supplying power to the second device. The switch module is used for controlling the communication state between the power module and the second device. The application can avoid the safety hidden troubles such as electric leakage and short circuit caused by the fact that civil devices continue to operate under the condition of fire extinguishing water spraying or a damp environment due to the lack of waterproof measures, and can effectively reduce the redundancy waste of backup energy.

Description

Technical Field

[0001] This application relates to the field of circuit control technology, and in particular to a combiner cabinet uninterruptible power supply distribution circuit. Background Technology

[0002] An uninterruptible power supply (UPS) is a device that continuously provides stable power to electrical equipment when the mains power is suddenly interrupted or the voltage is abnormal. UPS typically consists of an energy storage device and corresponding control circuitry. It can charge the energy storage device, such as a battery, when the mains power is normal, and quickly switch to the energy storage device for power supply when the mains power is abnormal, thereby ensuring the continuity of power supply to critical load equipment.

[0003] In existing building electrical designs, due to economic constraints, the output of uninterruptible power supply (UPS) systems often provides power to both fire-fighting equipment and general non-fire-fighting equipment. Examples of the former include fire alarm systems, emergency lighting systems, fire pumps, and fire elevators, while examples of the latter include general lighting, sockets, and office equipment. This configuration, where fire-fighting loads and civil loads share the same UPS system, is common in various public buildings, office buildings, and mixed-use buildings.

[0004] However, the design of sharing an uninterruptible power supply (UPS) with fire-fighting loads and civil loads has significant drawbacks: fire-fighting loads require longer emergency power supply times, while civil loads require relatively shorter emergency power supply times. If the battery capacity is configured uniformly according to the continuous power supply time requirements of fire-fighting loads, the amount of electricity stored for civil loads will significantly exceed the actual demand, thereby increasing the overall energy storage capacity of the energy storage device, resulting in a waste of energy storage capacity configuration and increasing construction and operation and maintenance costs. At the same time, in actual fire-fighting operations, non-fire-fighting equipment generally lacks waterproof and moisture-proof measures. Maintaining energized operation during fire-fighting water spraying operations can lead to safety risks such as leakage and short circuits, seriously threatening the safety of personnel and property. Utility Model Content

[0005] One objective of this application is to provide a combiner cabinet uninterruptible power distribution circuit, which aims to solve the technical problems such as leakage and configuration waste caused by the mixed use of fire-fighting equipment and non-fire-fighting equipment in related technologies.

[0006] To achieve the above objectives, this application provides a solution: a combiner cabinet uninterruptible power supply distribution circuit, comprising: a power module, including a first output terminal and a second output terminal, the first output terminal being used to supply power to a first device, and the second output terminal being used to supply power to a second device; a switch module, the first terminal of the switch module being connected to the second output terminal, the second terminal of the switch module being used to connect to the second device, and the switch module being used to control the connection state between the power module and the second device.

[0007] This application employs an independently controlled power supply for the second device. The second device is connected to the second output terminal of the power module via a switch module. When firefighting operations are initiated, the switch module can quickly cut off the power supply to the second device, effectively preventing safety hazards such as leakage and short circuits caused by the second device continuing to operate energized in fire-fighting spray or humid environments due to a lack of waterproofing measures. Simultaneously, the first device connected to the first output terminal is unaffected by the switch module's operation and can maintain a continuous and stable power supply during firefighting. For example, the first device is a fire-fighting device, and the second device is a non-fire-fighting device such as a civilian appliance.

[0008] Furthermore, since the first and second devices are controlled independently, their emergency usage time can be determined according to actual needs, thereby enabling targeted configuration of power reserve capacity, effectively reducing redundant waste of backup energy, and lowering construction and operation and maintenance costs.

[0009] According to one embodiment of this application, the switch module includes a first electromechanical switch, a first end of which is connected to a power supply module, and a second end of which is connected to a second device; it also includes a control module for controlling the on / off state of the first electromechanical switch.

[0010] Through the above implementation method, when a fire occurs, the control module can promptly control the first electromechanical switch to disconnect, thereby actively cutting off the power supply to the second equipment. This avoids the risk of leakage and short circuit caused by water ingress, dampness, or other factors in the fire-fighting environment, effectively improving the safety of electricity use during fire-fighting and ensuring the safety of personnel and property.

[0011] According to one embodiment of this application, the first electromechanical switch includes: a first contact switch controlled by the same coil and with synchronized switching states, connected between a first terminal of the second output terminal and a first input terminal of the second device; and a second contact switch connected between a second terminal of the second output terminal and a second input terminal of the second device.

[0012] According to one embodiment of this application, the control module includes: a second electromechanical switch and a controller, wherein the first electromechanical switch is a circuit breaker and the second electromechanical switch is a relay; the relay is connected in series in the first power supply path corresponding to the coil of the circuit breaker, so as to control the switching state of the circuit breaker by controlling the conduction state of the first power supply path; the controller is connected to the second power supply path corresponding to the relay, so as to control the conduction state of the second power supply path and thus control the switching state of the relay.

[0013] According to one embodiment of this application, it also includes a time delay switch module, which is connected in series in the second power supply path and is used to delay changing the conduction state of the second power supply path after a power outage occurs, thereby realizing the time delay control circuit breaker to disconnect the connection between the power supply module and the second device.

[0014] Through the above implementation method, when a power outage occurs, the time-delay switch module can delay the connection between the second device and the power module for a certain period of time before controlling the switch module to disconnect the connection, thereby realizing differentiated power supply for fire-fighting loads and civil loads: on the one hand, the second device actively disconnects power after its corresponding power supply duration, avoiding unnecessary power consumption; on the other hand, while the second device disconnects power in advance, the first device can maintain operation for a long time to meet emergency power supply needs. Therefore, energy storage capacity can be configured according to the differentiated power supply duration requirements of different loads, significantly reducing redundant configuration of energy storage devices and lowering construction and operation and maintenance costs.

[0015] According to one embodiment of this application, the time delay switch module includes a delayed disconnection type time relay, the coil power supply terminal of the time relay being connected to the mains power so that the time relay is controlled by the mains power.

[0016] According to one embodiment of this application, the control module further includes a switching power supply connected to a first power supply path and a second power supply path, for providing operating power to the first power supply path and the second power supply path.

[0017] According to one embodiment of this application, it also includes a plurality of third switches corresponding to a plurality of second devices, wherein the first end of the third switch is connected to the switch module, and the second end of the third switch is used to connect to the corresponding second device.

[0018] According to one embodiment of this application, the third switch includes: a third positive switch connected between a first terminal in the second end of the switch module and a first input terminal of the second device; and a third negative switch connected between a second terminal in the second end of the switch module and a second input terminal of the second device.

[0019] According to one embodiment of this application, the power module includes a plurality of first output terminals, each of which is used to supply power to a corresponding first device.

[0020] Other advantages, objectives and features of this application will be partly apparent from the description below, and partly understood by those skilled in the art through study and practice of this application. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 This is a logic block diagram of the uninterruptible power supply distribution circuit of the combiner cabinet provided in the embodiments of this application;

[0023] Figure 2 This is a circuit diagram of the uninterruptible power supply distribution circuit of the combiner cabinet provided in the embodiment of this application;

[0024] Figure 3 This is a circuit diagram of the switching module, control module, and delay module provided in the embodiments of this application. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0026] An uninterruptible power supply (UPS) is a device that continuously provides stable power to electrical equipment when the mains power is abnormal. It typically includes an energy storage device and corresponding control circuitry. When the mains power is normal, the energy storage device is charged, and when the mains power fails, the system quickly switches to the energy storage device to ensure the continuity of power supply for critical equipment. In existing building electrical designs, due to cost constraints, UPS systems typically power both primary equipment (300) such as fire alarm systems, fire pumps, and fire elevators, and general secondary equipment (400) such as general lighting, sockets, and office equipment. However, this design, where fire and residential loads share a UPS system, has significant shortcomings: because fire loads require longer power supply times while residential loads require shorter times, uniformly configuring the energy storage capacity according to fire safety standards would result in a significant overcapacity for residential loads, increasing waste in energy storage capacity configuration and maintenance costs. Furthermore, during actual firefighting operations, the secondary equipment (400) lacks waterproofing and moisture-proofing measures, and continuous operation with power can easily lead to safety accidents such as leakage and short circuits.

[0027] Please refer to Figure 1 and Figure 2 To achieve the above objectives, this application provides a solution: a combiner cabinet uninterruptible power supply distribution circuit, including a power module 100 and a switch module 200.

[0028] The power module 100 includes a first output terminal and a second output terminal. The first output terminal is used to supply power to the first device 300, and the second output terminal is used to supply power to the second device 400.

[0029] The first end of the switch module 200 is connected to the second output end, and the second end of the switch module 200 is used to connect to the second device 400. The switch module 200 is used to control the connection state between the power module 100 and the second device 400.

[0030] The uninterruptible power supply (UPS) distribution circuit of this application employs an independent power supply control method for the second device 400. Specifically, the second device 400 is connected to the second output terminal of the power module 100 via the switch module 200. When fire-fighting operations are initiated, the switch module 200 disconnects the power connection between the power module 100 and the second device 400, thereby promptly de-energizing the second device 400. Simultaneously, the first device 300 maintains independent power supply through the first output terminal of the power module 100, unaffected by the power-off action of the switch module 200, and can continue to maintain a stable power supply after the fire-fighting operation is initiated.

[0031] Through the aforementioned independently controlled power supply method, the power supply to the second device 400 can be actively cut off when firefighting operations are initiated. This effectively avoids safety hazards such as leakage and short circuits caused by the second device 400 continuing to operate energized in fire-fighting spray or humid environments due to a lack of waterproofing measures, significantly improving power supply safety during firefighting operations. Furthermore, since the power supply control of the first device 300 and the second device 400 is independent, the emergency usage time of both types of equipment can be determined and optimized according to actual needs. This allows for targeted configuration of backup power reserve capacity, avoiding redundant waste of backup energy and reducing system construction and operation / maintenance costs.

[0032] For example, there are multiple first devices 300, namely 301, 302, 303...30n shown in the figure; and multiple second devices 400, namely 401, 402, 403, 404, 405...40n shown in the figure.

[0033] For example, the power module 100 includes an energy storage device and a UPS control module. The energy storage device is connected to the DC power supply terminal of the UPS control module, and the AC input terminal of the UPS control module is connected to the mains power. The energy storage device can be a battery or an emergency power generation system, etc.

[0034] Please refer to the above as well. Figure 3 According to one embodiment of this application:

[0035] The switch module 200 includes a first electromechanical switch QF1, the first end of which is connected to the power module 100, and the second end of which is connected to the second device 400.

[0036] The power distribution circuit also includes a control module, which is used to control the on / off state of the first electromechanical switch QF1.

[0037] Through the above embodiments, this application uses an electromechanical switch as the active power-off implementation element. When fire-fighting operations are initiated, the control module actively controls the first electromechanical switch QF1 to disconnect, thereby quickly and actively cutting off the power connection between the power module 100 and the second device 400, achieving timely and active power-off of the second device 400. Since the switch module 200 is controlled by the control module, in the event of an actual fire, firefighters can actively control the disconnection of the first electromechanical switch QF1, enabling faster and more accurate power-off control of the second device 400, avoiding safety hazards caused by delayed or unreliable power-off actions.

[0038] Furthermore, due to the use of electro-mechanical switches, the control terminal can be connected to a safe low-voltage circuit, which further improves the safety of the control circuit, effectively avoids the risk of electric shock that may be caused by high-voltage control signals, and significantly improves the overall control safety and reliability of the system.

[0039] For example, an electromechanical switch can be implemented using a contactor. A contactor typically includes a low-voltage controlled electromagnetic coil and mechanical contacts driven by that coil. When the control module outputs a low-voltage control signal to the contactor's electromagnetic coil, the coil generates a magnetic force that acts on the mechanical contacts, causing them to close or open, thus controlling the on / off state of the load circuit. Because the control voltage of the electromagnetic coil is relatively low, operators or firefighters can actively control the circuit in a safe low-voltage environment, effectively avoiding the risk of electric shock from direct contact with high-voltage control signals. Simultaneously, the contactor physically isolates the high-voltage main circuit from the low-voltage control circuit, further ensuring the safety of the control loop and operators, and significantly improving the overall control safety and operational reliability of the system.

[0040] There may be one or more first electromechanical switches QF1. In one embodiment of this application, the first electromechanical switch includes: a first contact switch controlled by the same coil and with synchronized switching states, connected between a first terminal of the second output terminal and a first input terminal of the second device 400; and a second contact switch connected between a second terminal of the second output terminal and a second input terminal of the second device 400. By separately controlling the positive and negative circuits of the second device 400, a better circuit control effect is achieved.

[0041] It should be understood that in this embodiment and subsequent technical solutions, the terms "first terminal" and "second terminal" are applicable to the common wiring definition of AC power lines, that is, the first terminal and the second terminal respectively represent the live wire (L wire) and the neutral wire (N wire) of the AC power supply.

[0042] Specifically, in one embodiment of this application, the control module includes a second electromechanical switch KA1 and a controller BMS. The first electromechanical switch QF1 is a circuit breaker, and the second electromechanical switch KA1 is a relay. The relay is connected in series in the first power supply path corresponding to the coil of the circuit breaker, so as to control the switching state of the circuit breaker by controlling the conduction state of the first power supply path. The controller BMS is connected to the second power supply path corresponding to the relay, so as to control the switching state of the relay by controlling the conduction state of the second power supply path.

[0043] For clarity, the process and configuration principle of a complete control module controlling the circuit breaker module 200 to disconnect the circuit are explained here. The circuit breaker includes a first coil and a first mechanical contact. The first coil is connected to the first power supply path, and the first mechanical contact is connected to the main power supply line between the power module 100 and the second device 400, used to directly control the power supply between the power module 100 and the second device 400. The relay includes a second coil and a second mechanical contact. The second mechanical contact is connected in series in the first power supply path corresponding to the first coil. That is, the coil power supply of the circuit breaker is connected or disconnected by the closing or opening action of the second mechanical contact, thereby realizing the switching state control of the circuit breaker.

[0044] The BMS (Battery Management System) can be a microprocessor, PLC controller, or other logic control unit. Its output is connected to the second power supply path corresponding to the relay coil to control the conduction state of the second power supply path. When firefighting operations are initiated, the BMS controls the second power supply path to disconnect according to preset logic or fire commands directly input by firefighters. This causes the relay coil to lose power, resulting in the mechanical contacts of the relay opening and cutting off the power supply to the circuit breaker coil. In this situation, the circuit breaker coil loses power due to the lack of supply, causing the first mechanical contacts to automatically open, thereby actively and quickly disconnecting the power supply from the power module 100 to the second device 400.

[0045] It should be noted that this illustration only demonstrates one configuration of the switch module 200 and the control module. Depending on the circuit connection and contactor type, the controller BMS can also control the second power supply path to be connected according to preset logic or fire command directly input by the firefighter, energizing the relay coil, which in turn causes the relay's mechanical contacts to connect, thereby energizing the circuit breaker coil and causing the first mechanical contact to open under magnetic force. The technical effect of this application is achieved as long as the main power supply line connected to the circuit breaker is disconnected after the controller BMS outputs a command, preventing the second device 400 from obtaining power from the power module 100. In the following embodiments, the connection or disconnection mentioned can be understood by those skilled in the art as other alternative solutions without creative effort.

[0046] This embodiment provides a specific circuit configuration for two-stage contactor series control. The control module can achieve active control of the high-voltage main circuit in a low-voltage safe manner, which not only ensures electrical isolation between the control circuit and the high-voltage main circuit, but also ensures rapid and reliable active power disconnection of the second equipment 400 during fire fighting operations, further improving the safety and reliability of the uninterruptible power supply distribution circuit in this application.

[0047] According to one embodiment of this application, the power distribution circuit further includes a time delay switch module 200, which is connected in series in the second power supply path and is used to delay changing the conduction state of the second power supply path after a power outage occurs, thereby realizing the time delay control circuit breaker to disconnect the connection between the power supply module 100 and the second device 400.

[0048] In this embodiment, the time-delay switch module 200 is connected in series in the second power supply path. It is used to actively disconnect the power connection between the power module 100 and the second device 400 after a power outage event. When the external mains power fails, the time-delay switch module 200 detects the power outage signal and starts a time-delay timing process. Once the delay time reaches the preset duration, the time-delay switch module 200 automatically disconnects the second power supply path, causing the relay coil to lose power, resulting in the relay mechanical contacts automatically opening, thereby cutting off the power supply to the circuit breaker coil, and ultimately actively and quickly disconnecting the power supply line between the power module 100 and the second device 400.

[0049] Compared with existing technologies, this embodiment achieves automatic time-sharing control of the second device 400 and the first device 300 while simultaneously supplying power to both. When the external power supply is interrupted, the system first uses the power module 100 to continue supplying power to the fire protection circuit and important equipment, while the second device 400 temporarily maintains a short-term power supply state. After supplying power to the second device 400 for a period of time, the delay switch module 200 automatically controls the switch module 200 to perform a power-off action, completely de-energizing the second device 400, thereby ensuring that the fire protection circuit and the first device 300 can obtain sufficient and stable power supply capabilities. The technical solution of this embodiment supplies power to the second device 400 and the first device 300 simultaneously without the need for additional emergency power capacity to supply the second device 400, avoiding the waste of power resources caused by additional loads in the fire emergency power supply system, and further improving the overall reliability, economy, and safety of the system.

[0050] According to one embodiment of this application, the time delay switch module 200 includes a delayed disconnection type time relay KT1, the coil power supply terminal of the time relay KT1 is connected to the mains power so that the time relay KT1 is controlled by the mains power.

[0051] For example, the time-delay switch module 200 includes a time relay KT1, which comprises a coil and mechanical contacts. The coil of the time relay KT1 is connected to the mains circuit to sense the on / off state of the mains power and is controlled by the mains power. When the mains power is normally supplied, the coil is energized, the mechanical contacts close, and the second power supply path remains open. When the mains power is lost or interrupted, the coil is de-energized, the time-delay mechanism starts timing, and after a preset delay time, the mechanical contacts of the time relay KT1 automatically open, cutting off the second power supply path and achieving the delayed automatic power-off function. Although the coil of the time relay KT1 is connected to the high-voltage circuit of the mains power, the mechanical contacts of the time relay KT1 are only connected in series in the second power supply path, i.e., the low-voltage circuit. The coil circuit and the contact circuit are electrically isolated through the internal structure of the time relay KT1. This method ensures that the control circuit in the second power supply path always remains in a low-voltage state, thereby ensuring the low-voltage properties of the control module and related devices, preventing high-voltage lines from directly entering the control circuit, and improving the safety and reliability of the control circuit.

[0052] For example, the control module further includes a switching power supply SP1, which is connected to the first power supply path and the second power supply path to provide operating power to the first power supply path and the second power supply path.

[0053] By setting up a switching power supply SP1 within the control module, which simultaneously provides low-voltage safe power to the first and second power supply paths, the control module as a whole can operate in a safe low-voltage environment, preventing high voltage from directly entering the control module and improving the safety of the control module.

[0054] According to one embodiment of this application, a plurality of third switches are included, each corresponding to a plurality of second devices 400. The first end of the third switch is connected to the switch module 200, and the second end of the third switch is used to connect to the corresponding second device 400.

[0055] By setting up multiple third switches connected to multiple second devices 400, power can be distributed and supplied to multiple second devices 400 independently, improving the convenience and controllability of power supply to the second devices 400.

[0056] Specifically, the third switch includes a third positive switch and a third negative switch:

[0057] The third positive switch is connected between the first terminal in the second end of the switch module 200 and the first input terminal of the second device 400;

[0058] The third negative switch is connected between the second terminal in the second terminal of the switch module 200 and the second input terminal of the second device 400.

[0059] The reliability of the third switch is ensured by simultaneously controlling both poles of the second device 400.

[0060] According to one embodiment of this application, the power module 100 includes a plurality of first output terminals, each of which is used to supply power to a corresponding first device. By providing a plurality of first output terminals, the power module 100 can supply power to a plurality of first devices 300 simultaneously, thereby improving the flexibility and scalability of the power supply system.

[0061] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0062] It should also be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0063] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0064] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural transformations made based on the design concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A combination cabinet uninterruptible power supply distribution circuit, characterized in that, include: The power module includes a first output terminal and a second output terminal, wherein the first output terminal is used to power a first device and the second output terminal is used to power a second device. A switch module, wherein a first end of the switch module is connected to a second output end, a second end of the switch module is used to connect to the second device, and the switch module is used to control the connection state between the power module and the second device.

2. The circuit according to claim 1, characterized in that, The switching module includes a first electromechanical switch, a first end of which is connected to the power module, and a second end of which is connected to the second device. It also includes a control module, which is used to control the on / off state of the first electromechanical switch.

3. The circuit according to claim 2, characterized in that, The first electromechanical switch includes those controlled by the same coil and whose switching states are synchronized: The first contact switch is connected between the first terminal of the second output terminal and the first input terminal of the second device; The second contact switch is connected between the second terminal of the second output terminal and the second input terminal of the second device.

4. The circuit according to claim 2, characterized in that, The control module includes a second electromechanical switch and a controller, wherein the first electromechanical switch is a circuit breaker and the second electromechanical switch is a relay; The relay is connected in series in the first power supply path corresponding to the coil of the circuit breaker, so as to control the switching state of the circuit breaker by controlling the conduction state of the first power supply path. The controller is connected to the second power supply path corresponding to the relay to control the conduction state of the second power supply path and thus control the switching state of the relay.

5. The circuit according to claim 4, characterized in that, Also includes: A time-delay switch module is connected in series in the second power supply path to delay changing the conduction state of the second power supply path after a power outage, thereby delaying the circuit breaker to disconnect the power supply module from the second device.

6. The circuit according to claim 5, characterized in that, The time delay switch module includes a delayed disconnection type time relay, the coil power supply terminal of which is connected to the mains power so that the time relay is controlled by the mains power.

7. The circuit according to claim 4, characterized in that, The control module further includes a switching power supply, which is connected to the first power supply path and the second power supply path to provide operating power to the first power supply path and the second power supply path.

8. The circuit according to any one of claims 1-7, characterized in that, It also includes a plurality of third switches corresponding to a plurality of the second devices, wherein the first end of the third switch is connected to the switch module and the second end of the third switch is used to connect to the corresponding second device.

9. The circuit according to claim 8, characterized in that, The third switch includes: The third positive switch is connected between the first terminal in the second end of the switch module and the first input terminal of the second device; The third negative switch is connected between the second terminal of the second end of the switch module and the second input terminal of the second device.

10. The circuit according to any one of claims 1-7, characterized in that, The power module includes multiple first output terminals, each of which is used to supply power to the corresponding first device.

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