Elevator power failure rescue device

Abstract

The utility model relates to an elevator power failure rescue device which comprises a charging circuit, a relay K1, a storage battery pack, a control circuit, an inverter circuit and a transformer TR2. The input end of the charging circuit is connected to commercial power 220V AC, and the output end of the charging circuit is connected to the control circuit; the storage battery pack is communicated with the charging circuit and the control circuit through a relay K1, and the storage battery pack is connected with a load through an inverter circuit and a transformer TR2; and the control circuit is connected with the inverter circuit. According to the elevator power failure rescue device provided by the utility model, the relay is additionally arranged on the control loop for control, so that the power supply of the storage battery pack to the control circuit can be cut off by controlling the relay until the mains supply is recovered during power failure and after the storage battery pack finishes working, and the protection of the storage battery pack is realized; and irreparable damage caused by long-time discharging of the storage battery pack is avoided, and the elevator maintenance process is simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of elevator control, in particular to an elevator power failure rescue device. Background Art

[0002] With the increasing number of high-rise buildings, the use of elevators has become very popular. However, when there is a sudden power outage, people in the elevator cannot get out, causing passengers to panic and posing a great safety hazard. Elevator power outage rescue devices have emerged as the times require, and their use is gradually increasing. When the city power is out, the elevator power outage rescue device will power the elevator through a battery.

[0003] However, most of the elevator power failure rescue devices on the market will disconnect the inverter output power supply of the rescue device after the elevator power failure rescue is completed, but will not disconnect the power supply provided by the battery to the rescue device control circuit. In this case, if the power failure lasts for a long time and no staff manually controls to disconnect the battery power supply of the rescue device, the control circuit will run out of power in the battery, causing irreparable damage to the battery. Even after the mains power is restored, the battery cannot be charged and the rescue device will be in a faulty state. Utility Model Content

[0004] The utility model aims to solve the deficiencies of the prior art and provides an elevator power outage rescue device. After the elevator rescue work is completed, the power supply of the battery to the control circuit can be disconnected by controlling the relay until the mains power is restored, thereby protecting the battery, avoiding irreparable damage to the battery due to long-term discharge, and simplifying the elevator maintenance process.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] An elevator power failure rescue device comprises a charging circuit, a relay K1, a battery pack, a control circuit, an inverter circuit and a transformer TR2;

[0007] The input end of the charging circuit is connected to the mains 220VAC, and the output end of the charging circuit is connected to the control circuit; the battery pack is connected to the charging circuit and the control circuit through the relay K1, and the battery pack is connected to the load through the inverter circuit and the transformer TR2; the control circuit is connected to the inverter circuit.

[0008] The input end of the charging circuit is connected to the mains 220VAC, and the output end of the charging circuit is connected to the control circuit. After the control circuit is energized, the control relay K1 is closed, the charging circuit and the battery pack are connected to charge the battery pack; when the mains power supply is disconnected, the control circuit is powered by the battery pack; the inverter circuit inverts the DC power stored in the battery pack and outputs AC power, which is then increased to 380VAC through the transformer to power the rear-end load equipment; after the power outage rescue is completed, the control circuit will disconnect the output of the inverter circuit and disconnect relay K1 at the same time, disconnecting the battery pack and the control circuit. The battery pack is in a self-discharge state and is not connected to any load until the mains power is restored.

[0009] The charging circuit includes a rectifier bridge B1, a polarized capacitor C6, a high-frequency transformer TR1, a MOS tube Q1, a control chip U2, an optocoupler U1, and a chip U7;

[0010] Input AC 220V power supply L, N, after passing through the rectifier bridge B1, the AC voltage is converted into a pulsating DC voltage, and then filtered by the polar capacitor C6 to become a stable high-voltage DC power supply; the control chip U2 high-frequency PWM controls the MOS tube Q1 to turn on and off, realizing the charging and discharging energy storage control of the high-frequency transformer TR1, so that the high-frequency transformer outputs a stable low-voltage DC power; the chip U7 and the optocoupler U1 form a feedback loop to monitor the charging current and voltage of the battery pack and feed back to the control chip U2.

[0011] The battery pack includes four 12V batteries, which are connected in series one by one to form a 48V battery to provide power for the rear-end load.

[0012] The control circuit includes PWM drive optocoupler U3, PWM drive optocoupler U4, PWM drive optocoupler U6, PWM drive optocoupler U7, and logic control optocoupler U5;

[0013] Four drive circuits, optocoupler U3, U4, U6, and U7 circuits control a switch MOS tube respectively to achieve inverter control, converting AC power into DC power;

[0014] The logic control circuit controls the on / off of the control relay K1 by turning on / off the optocoupler U5.

[0015] The inverter circuit includes MOS tube Q3, MOS tube Q4, MOS tube Q5, and MOS tube Q6;

[0016] The D ends of the upper arm MOS tubes Q3 and Q4 are connected to the positive electrode of the battery pack; the S ends of the lower arm MOS tubes Q5 and Q6 are connected to the negative electrode of the battery pack; the S end of the upper arm MOS tube Q3 is connected to the D end of the lower arm MOS tube Q5, and is also connected to the R phase of the AC power output; the S end of the upper arm MOS tube Q4 is connected to the D end of the lower arm MOS tube Q6, and is also connected to the S phase of the AC power output.

[0017] The beneficial effect of the utility model is that the elevator power failure rescue device provided by the utility model adds relay control to the control circuit. When a power failure occurs, after the battery pack finishes working, the power supply of the control circuit by the battery pack can be disconnected by controlling the relay until the mains power is restored, thereby protecting the battery pack, avoiding irreparable damage to the battery pack due to long-term discharge, and simplifying the elevator maintenance process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is the main circuit block diagram of the elevator power failure rescue device of the utility model;

[0019] Figure 2 is a circuit diagram of a charging circuit;

[0020] Figure 3 It is the circuit diagram of the optocoupler U3 driving circuit in the control circuit;

[0021] Figure 4 It is the circuit diagram of the optocoupler U4 driving circuit in the control circuit;

[0022] Figure 5 It is the circuit diagram of the optocoupler U6 driving circuit in the control circuit;

[0023] Figure 6 It is the circuit diagram of the optocoupler U7 driving circuit in the control circuit;

[0024] Figure 7 It is the circuit diagram of the optocoupler U5 logic control circuit in the control circuit;

[0025] Figure 8 is a circuit diagram of an inverter circuit;

[0026] The following is a detailed description of the embodiments of the present invention with reference to the accompanying drawings. DETAILED DESCRIPTION

[0027] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention. The present invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become clearer according to the following description. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0029] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0030] An elevator power failure rescue device, such as Figure 1 As shown, it includes a charging circuit, a relay K1, a battery pack, a control circuit, an inverter circuit and a transformer TR2.

[0031] The input end of the charging circuit is connected to the mains 220VAC, and the output end of the charging circuit is connected to the control circuit; the battery pack is connected to the charging circuit and the control circuit through the relay K1, and the battery pack is connected to the load through the inverter circuit and the transformer TR2; the control circuit is connected to the inverter circuit.

[0032] The input end of the charging circuit is connected to the mains 220VAC, and the output end of the charging circuit is connected to the control circuit. After the control circuit is energized, the control relay K1 is closed, the charging circuit and the battery pack are connected to charge the battery pack; when the mains power supply is disconnected, the control circuit is powered by the battery pack; the inverter circuit inverts the DC power stored in the battery pack and outputs AC power, which is then increased to 380VAC through the transformer to power the rear-end load equipment; after the power outage rescue is completed, the control circuit will disconnect the output of the inverter circuit and disconnect relay K1 at the same time, disconnecting the battery pack and the control circuit. The battery pack is in a self-discharge state and is not connected to any load until the mains power is restored, thereby protecting the battery pack and avoiding irreparable damage to the battery pack due to long-term discharge, thereby simplifying the elevator maintenance process.

[0033] Charging circuit such as Figure 2 As shown, it includes a rectifier bridge B1, a polarized capacitor C6, a high-frequency transformer TR1, a MOS tube Q1, a control chip U2, an optocoupler U1, a chip U7, etc.

[0034] Input AC 220V power supply L, N, after passing through the rectifier bridge B1, the AC voltage is converted into a pulsating DC voltage, and then filtered by the polar capacitor C6 to become a stable high-voltage DC power supply; the control chip U2 high-frequency PWM controls the MOS tube Q1 to turn on and off, realizing the charging and discharging energy storage control of the high-frequency transformer TR1, so that the high-frequency transformer outputs a stable low-voltage DC power; the chip U7 and the optocoupler U1 form a feedback loop to monitor the charging current and voltage of the battery pack and feed back to the control chip U2.

[0035] The battery pack includes four 12V batteries, which are connected in series one by one to form a 48V battery to provide sufficient power for the rear-end load.

[0036] Control circuit such as Figure 3-Figure 7 As shown, it includes PWM drive optocoupler U3, PWM drive optocoupler U4, PWM drive optocoupler U6, PWM drive optocoupler U7, and logic control optocoupler U5.

[0037] The four driving circuits, optocouplers U3, U4, U6, and U7 circuits respectively control a switching MOS tube to achieve inverter control, that is, converting AC power into DC power.

[0038] The logic control circuit controls the on / off of the control relay K1 by turning on / off the optocoupler U5.

[0039] Inverter circuit such as Figure 8 As shown, it includes MOS transistor Q3, MOS transistor Q4, MOS transistor Q5, and MOS transistor Q6.

[0040] The D ends of the upper bridge arm MOS tubes Q3 and Q4 are connected to the positive electrode of the battery pack; the S ends of the lower bridge arm MOS tubes Q5 and Q6 are connected to the negative electrode of the battery pack; the S end of the upper bridge arm MOS tube Q3 is connected to the D end of the lower bridge arm MOS tube Q5, and is also connected to the R phase of the AC power output; the S end of the upper bridge arm MOS tube Q4 is connected to the D end of the lower bridge arm MOS tube Q6, and is also connected to the S phase of the AC power output. This circuit can convert the DC power supply BAT+ and BAT- of the battery pack into the AC power R and S outputs.

[0041] The elevator power failure rescue device provided by the utility model adds a relay control to the control circuit. When a power failure occurs, after the battery pack has finished working, the power supply of the control circuit to the battery pack can be disconnected by controlling the relay until the mains power is restored, thereby protecting the battery pack, avoiding irreparable damage to the battery pack due to long-term discharge, and simplifying the elevator maintenance process.

[0042] The utility model is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the utility model, or are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. An elevator power failure rescue device, characterized in that: It includes a charging circuit, a relay K1, a battery pack, a control circuit, an inverter circuit and a transformer TR2; The input end of the charging circuit is connected to the mains 220VAC, and the output end of the charging circuit is connected to the control circuit; the battery pack is connected to the charging circuit and the control circuit through the relay K1, and the battery pack is connected to the load through the inverter circuit and the transformer TR2; the control circuit is connected to the inverter circuit.

2. An elevator power failure rescue device according to claim 1, characterized in that: The input end of the charging circuit is connected to the mains 220VAC, and the output end of the charging circuit is connected to the control circuit. After the control circuit is energized, the control relay K1 is closed, the charging circuit and the battery pack are connected to charge the battery pack; when the mains power supply is disconnected, the control circuit is powered by the battery pack; the inverter circuit inverts the DC power stored in the battery pack and outputs AC power, which is then increased to 380VAC through the transformer to power the rear-end load equipment; after the power outage rescue is completed, the control circuit will disconnect the output of the inverter circuit and disconnect relay K1 at the same time, disconnecting the battery pack and the control circuit. The battery pack is in a self-discharge state and is not connected to any load until the mains power is restored.

3. The elevator power failure rescue device according to claim 2, characterized in that: The charging circuit includes a rectifier bridge B1, a polarized capacitor C6, a high-frequency transformer TR1, a MOS tube Q1, a control chip U2, an optocoupler U1, and a chip U7; Input AC 220V power supply L, N, after passing through the rectifier bridge B1, the AC voltage is converted into a pulsating DC voltage, and then filtered by the polar capacitor C6 to become a stable high-voltage DC power supply; the control chip U2 high-frequency PWM controls the MOS tube Q1 to turn on and off, realizing the charging and discharging energy storage control of the high-frequency transformer TR1, so that the high-frequency transformer outputs a stable low-voltage DC power; the chip U7 and the optocoupler U1 form a feedback loop to monitor the charging current and voltage of the battery pack and feed back to the control chip U2.

4. The elevator power failure rescue device according to claim 3, characterized in that: The battery pack includes four 12V batteries, which are connected in series one by one to form a 48V battery to provide power for the rear-end load.

5. The elevator power failure rescue device according to claim 4, characterized in that: The control circuit includes PWM drive optocoupler U3, PWM drive optocoupler U4, PWM drive optocoupler U6, PWM drive optocoupler U7, and logic control optocoupler U5; Four drive circuits, optocoupler U3, U4, U6, and U7 circuits control a switch MOS tube respectively to achieve inverter control, converting AC power into DC power; The logic control circuit controls the on / off of the control relay K1 by turning on / off the optocoupler U5.

6. The elevator power failure rescue device according to claim 5, characterized in that: The inverter circuit includes MOS tube Q3, MOS tube Q4, MOS tube Q5, and MOS tube Q6; The D terminals of the upper bridge arm MOS tubes Q3 and Q4 are connected to the positive electrode of the battery pack; the S terminals of the lower bridge arm MOS tubes Q5 and Q6 are connected to the negative electrode of the battery pack; the S terminal of the upper bridge arm MOS tube Q3 is connected to the D terminal of the lower bridge arm MOS tube Q5, and at the same time Connect to the R phase of the AC power output; the S end of the upper bridge arm MOS tube Q4 is connected to the D end of the lower bridge arm MOS tube Q6, Also connected to the S phase of the AC power output.

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