Low-voltage direct-current distribution device for hotels

Abstract

The utility model provides a low-voltage direct-current distribution device for a hotel. The low-voltage direct-current distribution device comprises a distribution box and distribution equipment arranged in the distribution box, the distribution device comprises a PCB, a lamp control module, a third AC-DC power supply module and an RCU main module, wherein the lamp control module, the third AC-DC power supply module and the RCU main module are arranged on the PCB. Compared with the prior art, the beneficial effects of the utility model are that low-voltage DC power distribution has better performance than AC power distribution in the aspects of transmission capacity, controllability, improvement of power supply quality, reduction of line loss, isolation of AC and DC faults, flexible and convenient access of renewable energy sources and the like; the method can effectively improve the electric energy quality, reduces the use of power electronic converters, reduces the electric energy loss and operation cost, and gives full play to the value and benefit of distributed energy.

Description

Technical Field

[0001] This utility model belongs to the field of power distribution box technology, and in particular to a hotel low-voltage DC distribution device. Background Technology

[0002] Currently, DC power transmission and distribution technology has become an important development direction for modern power grid construction. Household appliances require AC-DC conversion designs at their front-ends, increasing design complexity. Traditional buildings use AC power distribution systems, which suffer from energy losses during energy conversion and harmonic pollution from AC power, limiting the effective utilization of building energy.

[0003] In addition, existing hotel guest room control systems mix the incoming lines together during construction, which is not conducive to later construction and maintenance. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a hotel low-voltage DC distribution device that can improve the safety of the power distribution system, make the overall power supply system more energy-efficient and environmentally friendly, have better accessibility, and higher stability. At the same time, it can effectively control each line without affecting each other. The incoming lines adopt a distributed approach, which is beneficial for later construction and maintenance and improves the safety of use.

[0005] To solve the above-mentioned technical problems, the present invention provides a hotel low-voltage DC distribution device, comprising: a distribution box and distribution equipment disposed within the distribution box; the distribution equipment includes a PCB board and a lighting control module, a third AC-DC power supply module, and an RCU main module disposed on the PCB board; wherein the lighting control module includes a first AC-DC power supply module, a second AC-DC power supply module, and a DC digital lighting control module; the input terminal of the first AC-DC power supply module is connected to 220V AC power, and the output terminal of the first AC-DC power supply module is connected to the DC digital lighting control module to provide a 12V operating voltage; the input terminal of the second AC-DC power supply module is connected to 220V AC power, and the output terminal of the second AC-DC power supply module is connected to the DC digital lighting control module to provide a 48V driving voltage; the DC digital lighting control module... The module controls the external lighting fixtures of the distribution box via a set of 48V power line carriers to turn them on and off and dim them. The third AC-DC power module has its input connected to 220V AC power and its output used to power sockets, curtain motors, and VRV air conditioners. The RCU main module includes 220V and 48V lines. The input of the 220V line is used to connect to 220V AC power. The 220V line has two outputs. One output outputs 220V AC power to connect to an external 220V AC socket, and the other output outputs 12V DC power from an internal AC-DC converter circuit. This DC power is supplied to the air conditioner panel, scene panel, door magnet, probe, and dry contact equipment outside the distribution box via terminals. The input of the 48V line is connected to one of the outputs of the third AC-DC power module, and the output of the 48V line is used to connect to an external DC exhaust fan.

[0006] The distribution box includes a box body with a cavity and a door. One side of the box body is hinged to one side of the door. Heat dissipation vents are provided on both opposite inner sidewalls of the box body. The lighting control module, the third AC-DC power supply module, and the RCU main module are all installed in the inner cavity of the box body.

[0007] Multiple wire harness tubes and wire harness clips are installed in the lower part of the inner cavity of the box body. The multiple wire harness tubes are spaced apart on the box body through the wire harness clips. The wire harness clip includes: a base, which is an arc shape with an upward opening, and a locking mechanism is provided on the base. A locking element is provided on the inner side of the locking mechanism; a rotating seat, one side of which is rotatably connected to the base, and multiple locking teeth are provided on the rotating seat, with the multiple locking teeth corresponding to the locking element; and an insertion seat, which is located below the base and is inserted into the fixing hole of the box body.

[0008] The insertion seat includes: an insertion rod, one end of which is connected to the base; and a fixing member, which is disposed at the other end of the insertion rod and has multiple fixing teeth on its outer side.

[0009] A gasket is also provided on the inside of the base.

[0010] The enclosure body is equipped with a heat dissipation assembly, which includes an air inlet pipe and a blower nozzle outside the distribution box. One end of the air inlet pipe is connected to the blower nozzle, and the other end of the air inlet pipe is closed. The air inlet pipe has multiple small holes and is arranged in a spiral shape inside the cavity.

[0011] The first AC-DC power module is a 12V operating power supply, the second AC-DC power module is a 48V / 480W operating power supply, and the third AC-DC power module is a 48V / 600W operating power supply.

[0012] The DC digital lighting control module is connected to the RCU main module via a 485 bus to achieve signal control. The RCU main module communicates with the panel, door magnet, and probe devices outside the distribution box via a 485 bus.

[0013] It also includes an AC contactor and a fourth AC-DC power module. The input terminal of the AC contactor is used to connect to 220V AC power. The output terminal of the AC contactor is connected to the input terminal of the fourth AC-DC power module to reduce the no-load loss of AC-DC conversion. The output terminal of the fourth AC-DC power module is used to supply power to DC TVs and DC controlled sockets outside the distribution box. The RCU main module is connected to the AC contactor to control the conduction and disconnection of the AC contactor.

[0014] The RCU main module communicates with the floor switch via an Ethernet network to upload data to the cloud.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. Low-voltage DC power distribution has better performance than AC power distribution in terms of transmission capacity, controllability, power quality improvement, line loss reduction, AC / DC fault isolation, and flexible and convenient access to renewable energy. It can effectively improve power quality, reduce the use of power electronic converters, reduce power loss and operating costs, and give full play to the value and benefits of distributed energy.

[0017] 2. By placing the wire harness within the arc-shaped recess of the base and pressing down with the rotating seat, the wire harness tube is clamped. The locking teeth and locking elements on the rotating seat and base work together to hold the wire harness tube in place. Multiple locking teeth are available, adjustable to accommodate different wire harness diameters. A shim within the arc-shaped recess of the base provides support and protection for the wire harness tube. Furthermore, the base inserts into the fixing hole of the distribution box body via the lower insertion seat, and the fixing teeth on the outer side of the fixing element at the end of the insertion rod ensure the stability of the wire harness clamp. Attached Figure Description

[0018] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0019] Figure 1 This is a topological schematic diagram of the low-voltage DC guest room power distribution box of this utility model;

[0020] Figure 2 This is a schematic diagram of the distribution box of this utility model;

[0021] Figure 3 This is a schematic diagram of the wire harness clip of this utility model;

[0022] Figure 4 This is a schematic diagram of the wire harness clamp fixing of this utility model;

[0023] Figure 5 This is a schematic diagram of the DC digital lighting control module of this utility model;

[0024] Figure 6 This is a schematic diagram of the main control module structure of this utility model;

[0025] Figure 7 This is a schematic diagram of the drive module structure of this utility model. Detailed Implementation

[0026] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0027] For ease of description, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified. In this application, unless otherwise explicitly specified and limited, terms such as "installed," "connected," "joined," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] Unless otherwise specified, the terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains, and should be understood to have the meaning consistent with the meaning in the context of the relevant art, and should not be interpreted in an idealized or over-formalized manner, except as expressly defined in this invention.

[0029] Reference Figure 1 A low-voltage DC guest room distribution box, comprising:

[0030] The lighting control module includes a first AC-DC power supply module, a second AC-DC power supply module, and a DC digital lighting control module. The input terminal of the first AC-DC power supply module is connected to 220V AC power, and the output terminal of the first AC-DC power supply module is connected to the DC digital lighting control module to provide a 12V operating voltage. The input terminal of the second AC-DC power supply module is connected to 220V AC power, and the output terminal of the second AC-DC power supply module is connected to the DC digital lighting control module to provide a 48V driving voltage. The DC digital lighting control module controls the lighting fixtures outside the distribution box to turn on and off and dim via a set of 48V power line carrier waves.

[0031] Among them, such as Figures 5-7 As shown, the DC digital lighting control module includes a main control module 1 and a drive module 2. The main control module 1 and the drive module 2 are connected through an output bus 4. The main control module 1 supplies power to the drive module 2 and transmits control data through the output bus 4. The main control module 1 modulates the received external control data into lighting control data and transmits it to the drive module 2 through the output bus 4. The drive module 2 parses the lighting control data to control the connected lighting fixtures 3.

[0032] The main control module 1 includes a main controller 15, a reverse connection and impulse protection unit 11, a power decoupling unit 12, a modulation and overcurrent protection unit 13, and an output protection unit 14. The reverse connection and impulse protection unit 11, the power decoupling unit 12, the modulation and overcurrent protection unit 13, and the output protection unit 14 are connected in sequence to form a main power link. The main controller 15 is connected to the reverse connection and impulse protection unit 11, the modulation and overcurrent protection unit 13, and the output protection unit 14 respectively. The reverse connection and impulse protection unit 11 is connected to the DC power supply input 5, and the output protection unit 14 is connected to the drive module 2 through the output bus 4.

[0033] The reverse connection and surge protection unit 11 has a reverse connection protection function to prevent damage to the main controller 15 caused by the external power supply input being connected in reverse. The surge protection function is used to prevent the external power supply from failing to start or the input connector from failing under the surge of excessive current. Therefore, the DC power supply input 5 uses two wires, which do not need to distinguish between positive and negative, and supports output bus, star and tree wiring methods, so that it can be completed without additional learning during implementation.

[0034] The power decoupling unit 12 is used to maintain instantaneous high energy output during modulation communication; the modulation and overcurrent protection unit 13 is used to load communication data onto the power link, and also has the function of short-circuit protection for the output terminal of the downstream stage; the output protection unit 14 is used to prevent the modulation unit from failing due to excessive reverse electromotive force caused by excessive length of the downstream line during communication.

[0035] The main control module 1 also includes a low-voltage power supply unit 16, a data storage unit 17, and a communication unit 18. The main controller 15 is connected to the low-voltage power supply unit 16, the data storage unit 17, and the communication unit 18 respectively. The low-voltage power supply unit 16 supplies power to the main controller 15, the data storage unit 17, and the communication unit 18. The low-voltage power supply unit 16 is isolated from the main power link to ensure the reliability of the low-voltage part. The communication unit 18 is connected to an external communication interface 6, through which the communication unit 18 obtains external control data. The data storage unit 17 stores the configuration information of the drive module 2, which facilitates quick reconfiguration when the drive module 2 needs to be replaced.

[0036] The external communication interface 6 includes a 485 communication interface. The main control module 1 communicates with the outside world through the external communication interface 6 using the Modbus communication protocol, KNX communication protocol, or TCP / IP communication protocol.

[0037] The drive module 2 includes a first stepless processing unit 21, a power decoupling unit 22, a constant current unit 23, a second stepless processing unit 24, a signal modulation unit 26, and a processor 27. The first stepless processing unit 21 and the second stepless processing unit 24 are connected to the output bus 4. The first stepless processing unit 21, the power decoupling unit 22, and the constant current unit 23 are connected in sequence to form a drive power link. The constant current unit 23 is connected to the lamp 3. The second stepless processing unit 24, the signal modulation unit 26, and the processor 27 are connected in sequence to form a control link. The processor 27 is connected to the constant current unit 23 to control the lamp 3.

[0038] The first stepless processing unit 21 and the second stepless processing unit 24 eliminate the need for identifying DC positive and negative connections at the front-end input, reducing the requirements for wiring personnel and maintaining consistency with the current AC-powered LED driver wiring method; the constant current unit 23 provides constant current power to the downstream lamp 3; the signal demodulation unit 26 parses the loaded communication data signal into a level signal for the processor 27 to recognize as communication data; the processor 27 can adjust brightness, color temperature, etc. by controlling the current value of the constant current unit 23 through the PWM signal.

[0039] The drive module 2 also includes a low-power power supply unit 25, which supplies power to the signal conditioning unit 26 and the processor 27.

[0040] The processor 27 is equipped with an internal memory 28, which is used to store the configuration data of the lamp 3, including scene, maximum brightness, minimum brightness and dimming curve, etc. The processor 27 is connected to an address unit 29, which is used to set the address of the lamp 3 connected to the driver module 2 so as to realize the individual control of each lamp 3.

[0041] Scene data is stored in the internal memory 28. When a scene is invoked, multiple lights 3 can respond simultaneously with a single broadcast command. By setting address aliases (group names), in addition to broadcast group control and single control on the same circuit, it also allows for the setting of several different addresses driving the same logical group locally, enabling local group control via group names. A single device supports 255 scenes, 8 groups, and 16 scenes per group. The internal memory 28 contains a built-in dimming curve with optional configuration for easy light adjustment and control. The maximum and minimum brightness output ranges of the lights 3 can be configured via the internal memory 28, and the internal algorithm automatically stretches the range to 0-100% full scale.

[0042] Data transmission between the main control module 1 and the driver module 2 follows the DC digital lighting control protocol. Level transitions are indicated by the falling edge of the lower physical layer, ensuring that the output bus 4 is always physically high when idle. During communication, the duration of the physical high level is maximized to guarantee the power output capability of the output bus 4. The main control module 1 modulates external control data into lighting control data according to the DC digital lighting control protocol, and the driver module 2 parses the lighting control data according to the same protocol to control the connected lighting fixture 3. The specific DC digital lighting control protocol can use existing control protocols, which will not be elaborated upon here.

[0043] The DC digital lighting control module consists of a main control module 1 and a drive module 2. The main control module 1 and the drive module 2 are connected through an output bus 4. The output bus 4 is both a power supply line and a control line for transmitting control signals. This eliminates the need for additional control lines, reducing installation requirements, lowering costs, and improving efficiency. The output bus 4 is always physically high when idle, and during communication, it maximizes the duration of the physical high level to ensure the power output capability of the output bus 4.

[0044] Of course, any existing product on the market that meets the technical requirements can be used as the DC digital lighting control module, such as the HQ-DC-2M DC digital lighting control module from Bangqi Intelligent Technology (Shanghai) Co., Ltd.

[0045] The third AC-DC power module has its input end connected to 220V AC power, and its output end is used to power sockets, curtain motors, and VRV air conditioners.

[0046] The RCU main module (guest room controller main module, which can directly use any product on the market that meets the technical requirements, such as the BZ-HU003A-S RCU main module from Bangqi Intelligent Technology (Shanghai) Co., Ltd.) includes 220V and 48V lines. The input terminal of the 220V line is used to connect to 220V AC power. The 220V line has two output terminals. One output terminal outputs 220V AC power to connect to an external 220V AC socket, and the other output terminal outputs 12V DC power from the internal AC-DC converter circuit. This DC power is supplied to the air conditioning panel, scene panel, door magnet, probe, and dry contact equipment outside the distribution box through the wiring terminals. The input terminal of the 48V line is connected to one of the output terminals of the third AC-DC power module, and the output terminal of the 48V line is used to connect to an external DC exhaust fan.

[0047] The above solution has the following beneficial effects:

[0048] High safety: Low-voltage DC power supply is safer and more reliable than traditional AC power supply because the voltage of low-voltage DC is relatively low, making it less likely to cause electric shock accidents.

[0049] Energy-saving and environmentally friendly: Compared with the traditional AC power supply, low-voltage DC power supply is better adapted to the use of renewable energy sources such as solar and wind power, making the overall power supply system more energy-saving and environmentally friendly.

[0050] Excellent dimming performance: Compared with AC power supply, the low-voltage all-DC power supply for guest rooms can better realize the dimming function of the lighting system, making the lighting effect more flexible and diverse.

[0051] Cost savings: Reduced construction costs. This DC dimming method requires only one set of power lines to control and power DC lights in guest rooms. Compared to traditional DALI dimming and 0-10V dimming, which require two sets of lines (one power line and one signal line), it greatly saves on wiring and labor costs.

[0052] In one embodiment, the first AC-DC power module is a 12V AC-DC power module used to power the DC digital lighting control module; 220V AC power is input to this module, and this module outputs 12V DC power to the DC digital lighting control module; the second AC-DC power module is a 48V / 480W AC-DC power module used to power the lighting drive control circuit in the DC digital lighting control module; 220V AC power is input to this module, and this module outputs 48V DC power to the DC digital lighting control module.

[0053] The DC digital lighting control module is used for the control and power supply of external lighting fixtures and drivers within the distribution box. A 12V DC power supply from the first AC-DC power module (12V operating power) is input to the DC digital lighting control module, enabling it to enter normal operating mode. Simultaneously, a 48V DC power supply from the second AC-DC power module (48V / 480W) is input to the DC digital lighting control module, which then controls the external lighting fixture drivers to power the lighting fixtures. This module outputs 48V DC power, requiring only one set of power lines for the same lighting fixture or driver; this set of power lines can simultaneously handle both power supply and control functions.

[0054] Furthermore, the third AC-DC power module is a 48V / 600W AC-DC power module: used to power external equipment of the distribution box such as constantly powered sockets, constantly powered curtain motors, constantly powered DC air conditioners, and DC exhaust fans; 220V AC power is input to this module, and this module outputs 48V DC power to external equipment of the distribution box such as constantly powered sockets, constantly powered curtain motors, constantly powered DC air conditioners, and DC exhaust fans.

[0055] In one embodiment, the RCU main module is used for power supply and control of external devices in the distribution box, such as DC exhaust fans, 220V AC sockets, panels, door magnets, probes, dry contacts, and 485 communication devices. This module controls the closing of relays to make the power supply circuit of external devices such as DC exhaust fans and 220V AC sockets in the distribution box conductive. 220V AC power is input to this module, and this module outputs 12V and control signals to external devices in the distribution box, such as panels, door magnets, probes, dry contacts, and 485 communication devices.

[0056] In one embodiment, the low-voltage DC guest room distribution box further includes an AC contactor (in this embodiment, the AC contactor adopts the structure of the corresponding AC contactor in Chinese Utility Model Patent Application No. 201520080898.8, "A Novel Guest Room Emergency Lighting Control Circuit") and a fourth AC-DC power module. The input terminal of the AC contactor is used to connect to 220V AC power, and the output terminal of the AC contactor is connected to the input terminal of the fourth AC-DC power module to reduce the no-load loss of AC-DC conversion. The output terminal of the fourth AC-DC power module is used to supply power to the DC TV and DC controlled socket outside the distribution box. The RCU main module is connected to the AC contactor to control the conduction and disconnection of the AC contactor. When the RCU main module is faulty, it cannot control the conduction and disconnection of the AC contactor. Therefore, whether the AC contactor can conduct and disconnect can be used to determine whether the RCU main module is faulty.

[0057] In one embodiment, the AC contactor is used to connect or disconnect the 220V AC power supply to the fourth AC-DC power module (48V / 1200W). The connection or disconnection of the AC contactor is controlled by the RCU main module; 220V AC power is input to the AC contactor, and the AC contactor outputs 220V AC power to the fourth AC-DC power module (48V / 1200W); the fourth AC-DC power module (48V / 1200W) is used to power external equipment in the distribution box, such as DC TVs and DC controlled sockets; the 220V AC power output from the AC contactor is input to this module, and this module outputs 48V DC power to external equipment in the distribution box, such as DC TVs and DC controlled sockets.

[0058] The low-voltage DC guest room distribution box also includes a 485 communication network, an Ethernet network, and a 220V AC power supply network. The 485 communication network is used for communication between the DC digital lighting control module and the RCU main module, and for communication between the RCU main module and external devices such as panels, door magnets, and sensors. The Ethernet network is used for communication between the RCU main module and the outside world. The 220V AC power supply network is used to power all power modules, AC contactors, the RCU main module, and external 220V AC sockets. The AC power supply network inside the distribution box is formed by inputting power from the mains grid through an air switch.

[0059] The working process of the low-voltage DC guest room distribution box is as follows:

[0060] ① DC digital lighting control module: The 220V AC power supply is converted into 12V and 48V respectively through the first AC-DC power module (12V working power supply) and the second AC-DC power module (48V / 480W) to provide working voltage and lamp driving working voltage to the DC digital lighting control module. The DC digital lighting control module controls the lighting outside the distribution box to turn on and off, dim, etc. through a set of 48V power line carrier.

[0061] ②RCU Main Module: The RCU main module receives 220V AC power and outputs it from three parts. First, it supplies power to the external 220V AC socket via relay closure. Second, it sends control signals to the AC contactor via relay release and closure, controlling whether the contactor outputs 220V AC power, placing it in either a de-energized (released) or energized (operated) state. Third, it outputs 12V via an internal AC-DC converter circuit, supplying power to external devices such as air conditioner panels, scene panels, door sensors, probes, and dry contacts through terminal blocks.

[0062] ③ AC Contactor: 220V AC power is input to the fourth AC-DC power module (48V / 1200W) through the AC contactor to convert the 220V AC power to 48V, supplying power to the DC TV and DC controlled sockets outside the distribution box. The AC contactor only functions as a switch, used to indirectly control the opening and closing of the DC TV and the DC controlled sockets.

[0063] ④ Communication Network: When the DC digital lighting control module needs to communicate with the RCU main module, it communicates via the 485 communication network. When the RCU main module communicates with external devices such as panels, door sensors, and detectors in the distribution box, it communicates via the 485 communication network. When the RCU main module needs to upload data to the cloud, or when the cloud sends data to the RCU main module, it communicates with the floor switch via an Ethernet network. The RCU main module can send commands to the air conditioning panel outside the distribution box, and then the air conditioning panel outside the distribution box can control the DC air conditioner outside the distribution box to work, or the air conditioning panel outside the distribution box can directly control the DC air conditioner outside the distribution box to work.

[0064] ⑤ Third AC-DC power module (48V / 600W): 220V AC power is converted to 48V through the AC-DC power module, which powers the 48V constant power socket, 48V constant power curtain motor, and 48V constant power DC air conditioner outside the distribution box. The DC exhaust fan outside the distribution box is powered by the relay closed by the RCU main module.

[0065] Please see Figures 2-4 In one embodiment, the distribution box includes a box body 200 with a cavity and a door 100. One side of the box body 200 is hinged to one side of the door 100. Both inner sidewalls of the box body 200 are provided with heat dissipation vents 220. A PCB board is mounted on the module area 210 in the upper part of the cavity. The door 100 is provided with a transparent observation window 110.

[0066] The lower part of the cavity is equipped with multiple wire harness tubes 230 and wire harness clamps 240. The wire harness tubes 230 are arranged parallel and spaced apart by the wire harness clamps 240 at both ends, and are used to restrict the wire harness. The wire harness clamps 240 place the wire harness tubes 230 into the arc-shaped recess of the base 241. The rotating seat 242 presses down to clamp the wire harness tubes 230. The locking teeth 244 and locking elements 243 on the rotating seat 242 and the base 241 cooperate to clamp the wire harness tubes 230. Moreover, there are multiple locking teeth 244, which can be adjusted according to the wire diameter of different wire harness tubes 230. The gaskets 245 set in the arc-shaped recess of the base can provide a certain degree of support and protection for the wire harness tubes 230. On the other hand, the base 241 is inserted into the fixing hole (not shown in the figure) of the distribution box body through the lower insertion seat. Specifically, the stability of the wire harness tube 230 is ensured by the fixing teeth 248 on the outside of the fixing member 247 at the end of the insertion rod 246. The wire harness tube 230 can be a straight tube, or a tube with both curved and straight sections. The wire harness tube 230 makes the wiring orderly, which is convenient for installation and maintenance; the wire harness clamp 240 makes it easy to pass the wire harness out of the wire harness tube 230 and connect it to the corresponding module.

[0067] The enclosure is equipped with a heat dissipation system, which includes an air inlet duct (not shown in the figure) and an external air nozzle (not shown in the figure). One end of the air inlet duct is connected to the air nozzle, and the other end is closed. The air inlet duct has multiple small holes and is arranged in a spiral pattern within the enclosure's cavity. This heat dissipation system improves the heat dissipation of the enclosure while also preventing dust from entering the enclosure through the small holes, thus avoiding poor contact at the wiring terminals.

[0068] The above description of the embodiments is provided to enable those skilled in the art to understand and use the present invention. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the protection scope of the present invention.

Claims

1. A hotel low-voltage DC distribution device, characterized in that, Includes a distribution box and a distribution device disposed within the distribution box; The dispensing box includes a box body with a cavity and a door. One side of the box body is hinged to one side of the door. Heat dissipation vents are provided on both opposite inner sidewalls of the box body. The dispensing device is installed in the inner cavity of the box body. Multiple wire harness tubes and wire harness clamps are installed in the lower part of the inner cavity of the box body, and the multiple wire harness tubes are arranged on the box body at intervals through the wire harness clamps; in The wire harness clip includes: The base is an arc shape with an opening facing upwards, and a locking mechanism is provided on the base, with a locking element provided on the inner side of the locking mechanism; A rotating seat, one side of which is rotatably connected to the base, and a locking tooth is provided on the rotating seat, the locking tooth corresponding to the locking element; An insertion seat is provided below the base and is inserted into the fixing hole of the box body.

2. The hotel low-voltage DC distribution device according to claim 1, characterized in that, The distribution equipment includes a PCB board and a lighting control module, a third AC-DC power supply module, and an RCU main module mounted on the PCB board; wherein The lighting control module includes a first AC-DC power module, a second AC-DC power module, and a DC digital lighting control module. The input terminal of the first AC-DC power module is connected to 220V AC power, and the output terminal of the first AC-DC power module is connected to the DC digital lighting control module to provide a 12V operating voltage. The input terminal of the second AC-DC power module is connected to 220V AC power, and the output terminal of the second AC-DC power module is connected to the DC digital lighting control module to provide a 48V driving voltage. The DC digital lighting control module controls the lighting fixtures outside the distribution box to turn on / off and dim via a set of 48V power line carrier waves. The third AC-DC power module has its input end connected to 220V AC power, and its output end is used to power sockets, curtain motors and VRV air conditioners; The RCU main module includes a 220V line and a 48V line. The input terminal of the 220V line is used to connect to 220V AC power. The 220V line has two output terminals. One output terminal outputs 220V AC power to connect to an external 220V AC socket. The other output terminal outputs 12V DC power from an internal AC-DC converter circuit. This DC power is supplied to the air conditioning panel, scene panel, door magnet, probe, and dry contact equipment outside the distribution box through the wiring terminals. The input terminal of the 48V line is connected to one of the output terminals of the third AC-DC power module. The output terminal of the 48V line is used to connect to an external DC exhaust fan.

3. The hotel low-voltage DC distribution device according to claim 2, characterized in that, The insertion socket includes: An insertion rod, one end of which is connected to the base; A fixing member is provided at the other end of the insertion rod, and multiple fixing teeth are provided on the outer side of the fixing member.

4. The hotel low-voltage DC distribution device according to claim 3, characterized in that, A gasket is also provided on the inside of the base.

5. The hotel low-voltage DC distribution device according to claim 4, characterized in that, The rotating base is provided with multiple locking teeth.

6. The hotel low-voltage DC distribution device according to claim 5, characterized in that, The enclosure body is equipped with a heat dissipation assembly, which includes an air inlet pipe and a blower nozzle outside the distribution box. One end of the air inlet pipe is connected to the blower nozzle, and the other end of the air inlet pipe is closed. The air inlet pipe has multiple small holes and is arranged in a spiral shape inside the cavity.

7. The hotel low-voltage DC distribution device according to claim 6, characterized in that, The first AC-DC power module is a 12V operating power supply, the second AC-DC power module is a 48V / 480W operating power supply, and the third AC-DC power module is a 48V / 600W operating power supply.

8. The hotel low-voltage DC distribution device according to claim 7, characterized in that, The DC digital lighting control module is connected to the RCU main module via a 485 bus to achieve signal control. The RCU main module communicates with the panel, door magnet, and probe devices outside the distribution box via a 485 bus.

9. The hotel low-voltage DC distribution device according to claim 8, characterized in that, It also includes an AC contactor and a fourth AC-DC power module. The input terminal of the AC contactor is used to connect to 220V AC power. The output terminal of the AC contactor is connected to the input terminal of the fourth AC-DC power module to reduce the no-load loss of AC-DC conversion. The output terminal of the fourth AC-DC power module is used to supply power to DC TVs and DC controlled sockets outside the distribution box. The RCU main module is connected to the AC contactor to control the conduction and disconnection of the AC contactor.

10. The hotel low-voltage DC distribution device according to claim 9, characterized in that, The RCU main module communicates with the floor switch via an Ethernet network to upload data to the cloud.

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