Optimization system for realizing card-inserting electricity taking and eliminating reverse electromotive force in hotel control system

Abstract

The utility model relates to an optimization system for realizing card-inserting electricity taking and eliminating reverse electromotive force in a hotel control system, which comprises a power conversion circuit, a master control circuit, a radio frequency card reading circuit, a relay driving circuit and a resistance-capacitance absorption circuit, the output end of the power conversion circuit is connected with the master control circuit, the master control circuit is connected with the radio frequency card reading circuit, and the relay driving circuit is connected with the radio frequency card reading circuit. The relay drive circuit is connected with the master control circuit, and the resistance-capacitance absorption circuit is connected between the output end of the relay drive circuit and the zero line in parallel. According to the optimization system for eliminating the reverse electromotive force by using the plug-in card to take electricity in the hotel control system, the plug-in card to take electricity switch can better resist the interference of surge, so that the use of the product is more stable and reliable. By adopting the resistance-capacitance absorption circuit, coils of the contactor and the relay can be effectively protected, interference of overvoltage on electronic equipment in the control system is avoided, meanwhile, the electromagnetic environment is improved to a certain extent, and the reliability of the control system is improved.

Description

Technical Field

[0001] The utility model relates to the field of hotel control systems, in particular to the field of card-insertion power-taking equipment, and specifically refers to an optimization system for eliminating reverse electromotive force by implementing card-insertion power-taking in a hotel control system. Background Art

[0002] Existing card-based power supply products typically consist of a power conversion circuit, a main control circuit, an RFID reader circuit, and a relay driver circuit. In actual hotel deployments, an AC contactor is connected to the relay output to support a larger load. The AC contactor coil generates a high reverse electromotive force when switching on and off, which has a significant impact on the electronic components within the card-based power supply. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings of the above-mentioned prior art and provide a system for optimizing the elimination of reverse electromotive force in a hotel control system which is stable, reliable, simple in structure and has a wide range of applications.

[0004] In order to achieve the above objectives, the hotel control system of the present invention realizes the card insertion power elimination back electromotive force optimization system as follows:

[0005] The hotel control system implements a card-insertion power supply elimination and reverse electromotive force optimization system. Its main features are: the system includes a power conversion circuit, a main control circuit, a radio frequency card reader circuit, a relay drive circuit and a resistance-capacitance absorption circuit. The output end of the power conversion circuit is connected to the main control circuit, the main control circuit is connected to the radio frequency card reader circuit, the relay drive circuit is connected to the main control circuit, and the resistance-capacitance absorption circuit is connected in parallel between the output end of the relay drive circuit and the neutral line.

[0006] Preferably, the power conversion circuit includes a rectifier bridge and an AC / DC conversion chip. The power conversion circuit receives 220V AC power. The rectifier bridge is connected to the AC / DC conversion chip. The AC / DC conversion chip outputs a low-voltage DC power supply.

[0007] Preferably, the RC absorption circuit includes a resistor and a capacitor, the resistor and the capacitor are connected in series, the relay drive circuit includes a coil part, and the RC absorption circuit is connected in parallel at both ends of the coil.

[0008] Preferably, the system further includes an indicator light structure connected to the main control circuit.

[0009] The hotel control system implemented with this utility model implements a card-powered access system that eliminates reverse electromotive force optimization. The card-powered access switch can better resist surge interference, making the product more stable and reliable. The use of a resistance-capacitance snubber circuit can effectively protect the coils of contactors and relays, preventing overvoltage interference on electronic equipment in the control system. At the same time, it improves the electromagnetic environment to a certain extent and enhances the reliability of the control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 The schematic diagram of the circuit framework of the hotel control system of the utility model is a circuit diagram of the system for optimizing the elimination of reverse electromotive force by plugging in a card to obtain power.

[0011] Figure 2 This is a schematic diagram of a power supply board for implementing a card-insertion power supply elimination and back electromotive force optimization system in a hotel control system of the present invention.

[0012] Figure 3 This is a schematic diagram of a control panel for implementing a card-insertion power supply elimination and back electromotive force optimization system in a hotel control system of the present invention. DETAILED DESCRIPTION

[0013] In order to more clearly describe the technical content of the present invention, further description will be given below in conjunction with specific embodiments.

[0014] The hotel control system of the present invention realizes a card-insertion power-taking and reverse electromotive force elimination optimization system, which includes a power conversion circuit, a main control circuit, a radio frequency card reader circuit, a relay drive circuit and a resistance-capacitance absorption circuit. The output end of the power conversion circuit is connected to the main control circuit, the main control circuit is connected to the radio frequency card reader circuit, the relay drive circuit is connected to the main control circuit, and the resistance-capacitance absorption circuit is connected in parallel between the output end of the relay drive circuit and the neutral line.

[0015] As a preferred embodiment of the present invention, the power conversion circuit includes a rectifier bridge and an AC-DC conversion chip. The power conversion circuit receives 220V AC power, the rectifier bridge is connected to the AC-DC conversion chip, and the AC-DC conversion chip outputs a low-voltage DC power supply.

[0016] As a preferred embodiment of the present invention, the RC absorption circuit includes a resistor and a capacitor, the resistor and the capacitor are connected in series, the relay drive circuit includes a coil part, and the RC absorption circuit is connected in parallel at both ends of the coil.

[0017] As a preferred embodiment of the present invention, the system further includes an indicator light structure connected to the main control circuit.

[0018] In a specific embodiment of the utility model, it relates to a card-insertion power supply product, which includes a power conversion circuit, a main control circuit, a radio frequency card reading circuit, a relay drive circuit and a resistance-capacitance absorption circuit.

[0019] like Figure 1 As shown, the utility model relates to a card-insertion power supply product. The card-insertion power supply shown in the figure is not limited to the traditional wired card-insertion power supply, and is also applicable to wireless card-insertion power supply.

[0020] The card-insertion power switch consists of a power conversion circuit, a main control circuit, an RFID card reader circuit, a relay drive circuit, a button, and an indicator light. A resistor-capacitor absorption circuit is connected across the relay output to suppress surge voltage.

[0021] This product is powered by 220V AC power, which is converted into low-voltage DC power by the power supply part for use in the main control circuit, radio frequency card reader circuit, relay drive circuit and indicator light. An RC circuit composed of a resistor and a capacitor is connected in parallel between the output end of the relay drive circuit and the neutral line.

[0022] like Figure 2 As shown, the card-insertion power supply product involved in the present invention has an 86 switch size, and the power board part of the product includes an ACDC power supply part and a relay drive part.

[0023] The power board solution converts 220V AC power through a rectifier bridge and AC / DC converter chip to output low-voltage DC power for the subsequent identification circuit and output part. An RC circuit is connected in parallel between the relay's live wire output terminal and the neutral wire.

[0024] like Figure 3 The figure shows the control board for card insertion and power supply. The control board consists of a power conversion chip LDO, a main control circuit, and a radio frequency card reading circuit.

[0025] The control board solution includes a main control circuit, an RFID card reader circuit, a relay drive coil, buttons, and indicator lights. The RFID card reader circuit reads the card information and determines whether to connect the power supply by detecting whether the inserted card meets the preset standards. Once the RFID card reader confirms that the card meets the standards, the output circuit connects the AC power supply, allowing the electrical devices in the guest room to operate normally.

[0026] Connect an RC circuit in parallel between the relay's live and neutral wires. This product's RC absorption circuit allows for optimal use in harsh operating environments by absorbing interference signals in the AC circuit. A RC absorption circuit is a typical RC series circuit. It is typically used with inductive loads such as contactors and relays. Connected in parallel across the contactor coil, it acts in conjunction with the equivalent inductance of the inductive load, providing significant surge protection. Inductive loads in this context include AC contactor coils, etc.

[0027] Its working principle is: the RC absorption circuit is connected in parallel with the inductive load to form an RCL oscillation circuit. When a voltage with a high amplitude and frequency is generated due to the closing or disconnection of the control loop of the contactor coil, the capacitor is charged by utilizing the function of storing electrical energy. The capacitor, resistor and inductor form a cyclic charge and discharge circuit, and the energy is absorbed by the resistor and dissipated in the form of heat, thereby achieving the effect of suppressing overvoltage.

[0028] It is not limited to wired or wireless communication. It can be ZigBee, Thread, Wi-Fi, Bluetooth, or 485 bus, KNX bus, or DALI bus.

[0029] The specific implementation scheme of this embodiment can be found in the relevant descriptions in the above embodiments and will not be repeated here.

[0030] It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

[0031] It should be noted that, in the description of the present invention, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "plurality" is at least two.

[0032] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0033] The hotel control system implemented with this utility model implements a card-powered access system that eliminates reverse electromotive force optimization. The card-powered access switch can better resist surge interference, making the product more stable and reliable. The use of a resistance-capacitance snubber circuit can effectively protect the coils of contactors and relays, preventing overvoltage interference on electronic equipment in the control system. At the same time, it improves the electromagnetic environment to a certain extent and enhances the reliability of the control system.

[0034] In this specification, the present invention has been described with reference to specific embodiments thereof. However, it will be apparent that various modifications and variations may be made without departing from the spirit and scope of the present invention. Accordingly, the specification and drawings are to be regarded as illustrative rather than restrictive.

Claims

1. A card-insertion power supply elimination and reverse electromotive force optimization system in a hotel control system, characterized in that: The system includes a power conversion circuit, a main control circuit, a radio frequency card reader circuit, a relay drive circuit and a resistance-capacitance absorption circuit. The output end of the power conversion circuit is connected to the main control circuit, the main control circuit is connected to the radio frequency card reader circuit, the relay drive circuit is connected to the main control circuit, and the resistance-capacitance absorption circuit is connected in parallel between the output end of the relay drive circuit and the neutral line.

2. The hotel control system according to claim 1, wherein the card insertion power supply and the back electromotive force elimination optimization system are characterized in that: The power conversion circuit includes a rectifier bridge and an AC / DC conversion chip. The power conversion circuit receives 220V AC power. The rectifier bridge is connected to the AC / DC conversion chip, and the AC / DC conversion chip outputs a low-voltage DC power supply.

3. The system for optimizing the card insertion and power withdrawal to eliminate reverse electromotive force in the hotel control system according to claim 1, characterized in that: The RC absorption circuit includes a resistor and a capacitor, which are connected in series. The relay drive circuit includes a coil part, and the RC absorption circuit is connected in parallel at both ends of the coil.

4. The system for optimizing the card insertion and power removal and eliminating reverse electromotive force in the hotel control system according to claim 1, characterized in that: The system also includes an indicator light structure connected to the main control circuit.

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